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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_check_peer_live (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_check_peer_live (peer);
708 /* Establish a channel towards that peer to indicate we are going to send
710 Peers_indicate_sending_intention (peer);
711 //Peers_issue_peer_liveliness_check (peer);
716 * @brief If @a peer was unknown, check liveliness and insert it in view and
719 * @param peer peer to insert
722 got_peer (const struct GNUNET_PeerIdentity *peer)
724 /* If we did not know this peer already, insert it into sampler and view */
725 if (GNUNET_YES == Peers_check_peer_live (peer))
727 Peers_schedule_operation (peer, insert_in_sampler);
728 Peers_schedule_operation (peer, insert_in_view_op);
733 * @brief Checks if there is a sending channel and if it is needed
735 * @param peer the peer whose sending channel is checked
736 * @return GNUNET_YES if sending channel exists and is still needed
737 * GNUNET_NO otherwise
740 check_sending_channel_needed (const struct GNUNET_PeerIdentity *peer)
742 /* struct GNUNET_CADET_Channel *channel; */
743 if (GNUNET_NO == Peers_check_peer_known (peer))
747 if (GNUNET_YES == Peers_check_sending_channel_exists (peer))
749 if ( (0 < RPS_sampler_count_id (prot_sampler, peer)) ||
750 (GNUNET_YES == View_contains_peer (peer)) ||
751 (GNUNET_YES == CustomPeerMap_contains_peer (push_map, peer)) ||
752 (GNUNET_YES == CustomPeerMap_contains_peer (pull_map, peer)) ||
753 (GNUNET_YES == Peers_check_peer_flag (peer, Peers_PULL_REPLY_PENDING)))
754 { /* If we want to keep the connection to peer open */
763 * @brief remove peer from our knowledge, the view, push and pull maps and
766 * @param peer the peer to remove
769 remove_peer (const struct GNUNET_PeerIdentity *peer)
771 View_remove_peer (peer);
772 CustomPeerMap_remove_peer (pull_map, peer);
773 CustomPeerMap_remove_peer (push_map, peer);
774 RPS_sampler_reinitialise_by_value (prot_sampler, peer);
775 RPS_sampler_reinitialise_by_value (client_sampler, peer);
776 Peers_remove_peer (peer);
781 * @brief Remove data that is not needed anymore.
783 * If the sending channel is no longer needed it is destroyed.
785 * @param peer the peer whose data is about to be cleaned
788 clean_peer (const struct GNUNET_PeerIdentity *peer)
790 if (GNUNET_NO == check_sending_channel_needed (peer))
792 #ifdef ENABLE_MALICIOUS
793 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
794 Peers_destroy_sending_channel (peer);
795 #else /* ENABLE_MALICIOUS */
796 Peers_destroy_sending_channel (peer);
797 #endif /* ENABLE_MALICIOUS */
800 if ( (GNUNET_NO == Peers_check_peer_send_intention (peer)) &&
801 (GNUNET_NO == View_contains_peer (peer)) &&
802 (GNUNET_NO == CustomPeerMap_contains_peer (push_map, peer)) &&
803 (GNUNET_NO == CustomPeerMap_contains_peer (push_map, peer)) &&
804 (0 == RPS_sampler_count_id (prot_sampler, peer)) &&
805 (0 == RPS_sampler_count_id (client_sampler, peer)) )
806 { /* We can safely remov this peer */
810 Peers_clean_peer (peer);
814 * @brief This is called when a channel is destroyed.
816 * Removes peer completely from our knowledge if the send_channel was destroyed
817 * Otherwise simply delete the recv_channel
819 * @param cls The closure
820 * @param channel The channel being closed
821 * @param channel_ctx The context associated with this channel
824 cleanup_destroyed_channel (void *cls,
825 const struct GNUNET_CADET_Channel *channel,
828 struct GNUNET_PeerIdentity *peer;
830 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
831 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
832 // FIXME wait for cadet to change this function
834 if (GNUNET_NO == Peers_check_peer_known (peer))
835 { /* We don't know a context to that peer */
836 LOG (GNUNET_ERROR_TYPE_WARNING,
837 "channel (%s) without associated context was destroyed\n",
842 if (GNUNET_YES == Peers_check_peer_flag (peer, Peers_TO_DESTROY))
843 { /* We are in the middle of removing that peer from our knowledge. In this
844 case simply make sure that the channels are cleaned. */
845 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
846 to_file (file_name_view_log,
847 "-%s\t(cleanup channel, ourself)",
848 GNUNET_i2s_full (peer));
853 Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_SENDING))
854 { /* Channel used for sending was destroyed */
855 /* Possible causes of channel destruction:
856 * - ourselves -> cleaning send channel -> clean context
857 * - other peer -> peer probably went down -> remove
859 if (GNUNET_YES == Peers_check_channel_flag (channel_ctx, Peers_CHANNEL_CLEAN))
860 { /* We are about to clean the sending channel. Clean the respective
862 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
866 { /* Other peer destroyed our sending channel that he is supposed to keep
867 * open. It probably went down. Remove it from our knowledge. */
868 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
873 else if (GNUNET_YES ==
874 Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_RECEIVING))
875 { /* Channel used for receiving was destroyed */
876 /* Possible causes of channel destruction:
877 * - ourselves -> peer tried to establish channel twice -> clean context
878 * - other peer -> peer doesn't want to send us data -> clean
881 Peers_check_channel_flag (channel_ctx, Peers_CHANNEL_ESTABLISHED_TWICE))
882 { /* Other peer tried to establish a channel to us twice. We do not accept
883 * that. Clean the context. */
884 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
888 { /* Other peer doesn't want to send us data anymore. We are free to clean
890 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
897 LOG (GNUNET_ERROR_TYPE_WARNING,
898 "Destroyed channel is neither sending nor receiving channel\n");
902 /***********************************************************************
904 ***********************************************************************/
907 destroy_reply_cls (struct ReplyCls *rep_cls)
909 struct ClientContext *cli_ctx;
911 cli_ctx = GNUNET_SERVER_client_get_user_context (rep_cls->client,
912 struct ClientContext);
913 GNUNET_assert (NULL != cli_ctx);
914 GNUNET_CONTAINER_DLL_remove (cli_ctx->rep_cls_head,
915 cli_ctx->rep_cls_tail,
917 GNUNET_free (rep_cls);
922 destroy_cli_ctx (struct ClientContext *cli_ctx)
924 GNUNET_assert (NULL != cli_ctx);
925 if (NULL != cli_ctx->mq)
927 GNUNET_MQ_destroy (cli_ctx->mq);
929 if (NULL != cli_ctx->rep_cls_head)
931 LOG (GNUNET_ERROR_TYPE_WARNING,
932 "Trying to destroy the context of a client that still has pending requests. Going to clean those\n");
933 while (NULL != cli_ctx->rep_cls_head)
934 destroy_reply_cls (cli_ctx->rep_cls_head);
936 GNUNET_CONTAINER_DLL_remove (cli_ctx_head,
939 GNUNET_free (cli_ctx);
944 * Function called by NSE.
946 * Updates sizes of sampler list and view and adapt those lists
950 nse_callback (void *cls,
951 struct GNUNET_TIME_Absolute timestamp,
952 double logestimate, double std_dev)
955 //double scale; // TODO this might go gloabal/config
957 LOG (GNUNET_ERROR_TYPE_DEBUG,
958 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
959 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
961 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
962 // GNUNET_NSE_log_estimate_to_n (logestimate);
963 estimate = pow (estimate, 1.0 / 3);
964 // TODO add if std_dev is a number
965 // estimate += (std_dev * scale);
966 if (2 < ceil (estimate))
968 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
969 sampler_size_est_need = estimate;
971 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
973 /* If the NSE has changed adapt the lists accordingly */
974 resize_wrapper (prot_sampler, sampler_size_est_need);
975 client_resize_wrapper ();
980 * Callback called once the requested PeerIDs are ready.
982 * Sends those to the requesting client.
985 client_respond (void *cls,
986 struct GNUNET_PeerIdentity *peer_ids,
990 struct GNUNET_MQ_Envelope *ev;
991 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
992 struct ReplyCls *reply_cls = (struct ReplyCls *) cls;
993 uint32_t size_needed;
994 struct ClientContext *cli_ctx;
996 GNUNET_assert (NULL != reply_cls);
997 LOG (GNUNET_ERROR_TYPE_DEBUG,
998 "sampler returned %" PRIu32 " peers:\n",
1000 for (i = 0; i < num_peers; i++)
1002 LOG (GNUNET_ERROR_TYPE_DEBUG,
1003 " %" PRIu32 ": %s\n",
1005 GNUNET_i2s (&peer_ids[i]));
1008 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1009 num_peers * sizeof (struct GNUNET_PeerIdentity);
1011 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1013 ev = GNUNET_MQ_msg_extra (out_msg,
1014 num_peers * sizeof (struct GNUNET_PeerIdentity),
1015 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1016 out_msg->num_peers = htonl (num_peers);
1017 out_msg->id = htonl (reply_cls->id);
1019 memcpy (&out_msg[1],
1021 num_peers * sizeof (struct GNUNET_PeerIdentity));
1022 GNUNET_free (peer_ids);
1024 cli_ctx = GNUNET_SERVER_client_get_user_context (reply_cls->client,
1025 struct ClientContext);
1026 GNUNET_assert (NULL != cli_ctx);
1027 destroy_reply_cls (reply_cls);
1028 GNUNET_MQ_send (cli_ctx->mq, ev);
1033 * Handle RPS request from the client.
1035 * @param cls closure
1036 * @param client identification of the client
1037 * @param message the actual message
1040 handle_client_request (void *cls,
1041 struct GNUNET_SERVER_Client *client,
1042 const struct GNUNET_MessageHeader *message)
1044 struct GNUNET_RPS_CS_RequestMessage *msg;
1046 uint32_t size_needed;
1047 struct ReplyCls *reply_cls;
1049 struct ClientContext *cli_ctx;
1051 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1053 num_peers = ntohl (msg->num_peers);
1054 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1055 num_peers * sizeof (struct GNUNET_PeerIdentity);
1057 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1059 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1060 "Message received from client has size larger than expected\n");
1061 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1065 for (i = 0 ; i < num_peers ; i++)
1068 LOG (GNUNET_ERROR_TYPE_DEBUG,
1069 "Client requested %" PRIu32 " random peer(s).\n",
1072 reply_cls = GNUNET_new (struct ReplyCls);
1073 reply_cls->id = ntohl (msg->id);
1074 reply_cls->client = client;
1075 reply_cls->req_handle = RPS_sampler_get_n_rand_peers (client_sampler,
1080 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
1081 GNUNET_assert (NULL != cli_ctx);
1082 GNUNET_CONTAINER_DLL_insert (cli_ctx->rep_cls_head,
1083 cli_ctx->rep_cls_tail,
1085 GNUNET_SERVER_receive_done (client,
1091 * @brief Handle a message that requests the cancellation of a request
1094 * @param client the client that requests the cancellation
1095 * @param message the message containing the id of the request
1098 handle_client_request_cancel (void *cls,
1099 struct GNUNET_SERVER_Client *client,
1100 const struct GNUNET_MessageHeader *message)
1102 struct GNUNET_RPS_CS_RequestCancelMessage *msg =
1103 (struct GNUNET_RPS_CS_RequestCancelMessage *) message;
1104 struct ClientContext *cli_ctx;
1105 struct ReplyCls *rep_cls;
1107 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
1108 GNUNET_assert (NULL != cli_ctx->rep_cls_head);
1109 rep_cls = cli_ctx->rep_cls_head;
1110 LOG (GNUNET_ERROR_TYPE_DEBUG,
1111 "Client cancels request with id %" PRIu32 "\n",
1113 while ( (NULL != rep_cls->next) &&
1114 (rep_cls->id != ntohl (msg->id)) )
1115 rep_cls = rep_cls->next;
1116 GNUNET_assert (rep_cls->id == ntohl (msg->id));
1117 RPS_sampler_request_cancel (rep_cls->req_handle);
1118 destroy_reply_cls (rep_cls);
1119 GNUNET_SERVER_receive_done (client,
1125 * Handle seed from the client.
1127 * @param cls closure
1128 * @param client identification of the client
1129 * @param message the actual message
1132 handle_client_seed (void *cls,
1133 struct GNUNET_SERVER_Client *client,
1134 const struct GNUNET_MessageHeader *message)
1136 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1137 struct GNUNET_PeerIdentity *peers;
1141 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1143 GNUNET_break_op (0);
1144 GNUNET_SERVER_receive_done (client,
1148 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1149 num_peers = ntohl (in_msg->num_peers);
1150 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1151 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1152 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1154 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1155 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1157 GNUNET_break_op (0);
1158 GNUNET_SERVER_receive_done (client,
1163 LOG (GNUNET_ERROR_TYPE_DEBUG,
1164 "Client seeded peers:\n");
1165 print_peer_list (peers, num_peers);
1167 for (i = 0; i < num_peers; i++)
1169 LOG (GNUNET_ERROR_TYPE_DEBUG,
1170 "Updating samplers with seed %" PRIu32 ": %s\n",
1172 GNUNET_i2s (&peers[i]));
1174 got_peer (&peers[i]);
1176 //RPS_sampler_update (prot_sampler, &peers[i]);
1177 //RPS_sampler_update (client_sampler, &peers[i]);
1180 ////GNUNET_free (peers);
1182 GNUNET_SERVER_receive_done (client,
1188 * Handle a PUSH message from another peer.
1190 * Check the proof of work and store the PeerID
1191 * in the temporary list for pushed PeerIDs.
1193 * @param cls Closure
1194 * @param channel The channel the PUSH was received over
1195 * @param channel_ctx The context associated with this channel
1196 * @param msg The message header
1199 handle_peer_push (void *cls,
1200 struct GNUNET_CADET_Channel *channel,
1202 const struct GNUNET_MessageHeader *msg)
1204 const struct GNUNET_PeerIdentity *peer;
1206 // (check the proof of work (?))
1208 peer = (const struct GNUNET_PeerIdentity *)
1209 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1210 // FIXME wait for cadet to change this function
1212 LOG (GNUNET_ERROR_TYPE_DEBUG,
1213 "Received PUSH (%s)\n",
1216 #ifdef ENABLE_MALICIOUS
1217 struct AttackedPeer *tmp_att_peer;
1219 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1220 memcpy (&tmp_att_peer->peer_id, peer, sizeof (struct GNUNET_PeerIdentity));
1223 { /* Try to maximise representation */
1224 if (NULL == att_peer_set)
1225 att_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1226 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1229 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1232 add_peer_array_to_set (peer, 1, att_peer_set);
1238 else if (2 == mal_type)
1239 { /* We attack one single well-known peer - simply ignore */
1244 GNUNET_free (tmp_att_peer);
1247 #endif /* ENABLE_MALICIOUS */
1249 /* Add the sending peer to the push_map */
1250 CustomPeerMap_put (push_map, peer);
1252 GNUNET_CADET_receive_done (channel);
1258 * Handle PULL REQUEST request message from another peer.
1260 * Reply with the view of PeerIDs.
1262 * @param cls Closure
1263 * @param channel The channel the PULL REQUEST was received over
1264 * @param channel_ctx The context associated with this channel
1265 * @param msg The message header
1268 handle_peer_pull_request (void *cls,
1269 struct GNUNET_CADET_Channel *channel,
1271 const struct GNUNET_MessageHeader *msg)
1273 struct GNUNET_PeerIdentity *peer;
1274 const struct GNUNET_PeerIdentity *view_array;
1276 peer = (struct GNUNET_PeerIdentity *)
1277 GNUNET_CADET_channel_get_info (channel,
1278 GNUNET_CADET_OPTION_PEER);
1279 // FIXME wait for cadet to change this function
1281 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REQUEST (%s)\n", GNUNET_i2s (peer));
1283 #ifdef ENABLE_MALICIOUS
1286 { /* Try to maximise representation */
1287 send_pull_reply (peer, mal_peers, num_mal_peers);
1291 else if (2 == mal_type)
1292 { /* Try to partition network */
1293 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
1295 send_pull_reply (peer, mal_peers, num_mal_peers);
1299 #endif /* ENABLE_MALICIOUS */
1301 view_array = View_get_as_array ();
1303 send_pull_reply (peer, view_array, View_size ());
1305 GNUNET_CADET_receive_done (channel);
1311 * Handle PULL REPLY message from another peer.
1313 * Check whether we sent a corresponding request and
1314 * whether this reply is the first one.
1316 * @param cls Closure
1317 * @param channel The channel the PUSH was received over
1318 * @param channel_ctx The context associated with this channel
1319 * @param msg The message header
1322 handle_peer_pull_reply (void *cls,
1323 struct GNUNET_CADET_Channel *channel,
1325 const struct GNUNET_MessageHeader *msg)
1327 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1328 struct GNUNET_PeerIdentity *peers;
1329 struct GNUNET_PeerIdentity *sender;
1331 #ifdef ENABLE_MALICIOUS
1332 struct AttackedPeer *tmp_att_peer;
1333 #endif /* ENABLE_MALICIOUS */
1335 /* Check for protocol violation */
1336 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1338 GNUNET_break_op (0);
1339 GNUNET_CADET_receive_done (channel);
1340 return GNUNET_SYSERR;
1343 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1344 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1345 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1347 LOG (GNUNET_ERROR_TYPE_ERROR,
1348 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
1349 ntohl (in_msg->num_peers),
1350 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1351 sizeof (struct GNUNET_PeerIdentity));
1352 GNUNET_break_op (0);
1353 GNUNET_CADET_receive_done (channel);
1354 return GNUNET_SYSERR;
1357 // Guess simply casting isn't the nicest way...
1358 // FIXME wait for cadet to change this function
1359 sender = (struct GNUNET_PeerIdentity *)
1360 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1362 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REPLY (%s)\n", GNUNET_i2s (sender));
1364 if (GNUNET_YES != Peers_check_peer_flag (sender, Peers_PULL_REPLY_PENDING))
1366 LOG (GNUNET_ERROR_TYPE_WARNING,
1367 "Received a pull reply from a peer we didn't request one from!\n");
1368 GNUNET_break_op (0);
1369 GNUNET_CADET_receive_done (channel);
1374 #ifdef ENABLE_MALICIOUS
1375 // We shouldn't even receive pull replies as we're not sending
1378 #endif /* ENABLE_MALICIOUS */
1380 /* Do actual logic */
1381 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1383 LOG (GNUNET_ERROR_TYPE_DEBUG,
1384 "PULL REPLY received, got following %u peers:\n",
1385 ntohl (in_msg->num_peers));
1387 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1389 LOG (GNUNET_ERROR_TYPE_DEBUG,
1392 GNUNET_i2s (&peers[i]));
1394 #ifdef ENABLE_MALICIOUS
1395 if ((NULL != att_peer_set) &&
1396 (1 == mal_type || 3 == mal_type))
1397 { /* Add attacked peer to local list */
1398 // TODO check if we sent a request and this was the first reply
1399 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1401 && GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (mal_peer_set,
1403 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&peers[i],
1406 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1407 tmp_att_peer->peer_id = peers[i];
1408 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1411 add_peer_array_to_set (&peers[i], 1, att_peer_set);
1415 #endif /* ENABLE_MALICIOUS */
1416 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity,
1419 /* Make sure we 'know' about this peer */
1420 (void) Peers_check_peer_live (&peers[i]);
1422 if (GNUNET_YES == Peers_check_peer_valid (&peers[i]))
1424 CustomPeerMap_put (pull_map, &peers[i]);
1428 Peers_schedule_operation (&peers[i], insert_in_pull_map);
1429 Peers_issue_peer_liveliness_check (&peers[i]);
1434 Peers_unset_peer_flag (sender, Peers_PULL_REPLY_PENDING);
1435 clean_peer (sender);
1437 GNUNET_CADET_receive_done (channel);
1443 * Compute a random delay.
1444 * A uniformly distributed value between mean + spread and mean - spread.
1446 * For example for mean 4 min and spread 2 the minimum is (4 min - (1/2 * 4 min))
1447 * It would return a random value between 2 and 6 min.
1449 * @param mean the mean
1450 * @param spread the inverse amount of deviation from the mean
1452 static struct GNUNET_TIME_Relative
1453 compute_rand_delay (struct GNUNET_TIME_Relative mean,
1454 unsigned int spread)
1456 struct GNUNET_TIME_Relative half_interval;
1457 struct GNUNET_TIME_Relative ret;
1458 unsigned int rand_delay;
1459 unsigned int max_rand_delay;
1463 LOG (GNUNET_ERROR_TYPE_WARNING,
1464 "Not accepting spread of 0\n");
1468 /* Compute random time value between spread * mean and spread * mean */
1469 half_interval = GNUNET_TIME_relative_divide (mean, spread);
1471 max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us / mean.rel_value_us * (2/spread);
1473 * Compute random value between (0 and 1) * round_interval
1474 * via multiplying round_interval with a 'fraction' (0 to value)/value
1476 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, max_rand_delay);
1477 ret = GNUNET_TIME_relative_multiply (mean, rand_delay);
1478 ret = GNUNET_TIME_relative_divide (ret, max_rand_delay);
1479 ret = GNUNET_TIME_relative_add (ret, half_interval);
1481 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
1482 LOG (GNUNET_ERROR_TYPE_WARNING,
1483 "Returning FOREVER_REL\n");
1490 * Send single pull request
1492 * @param peer_id the peer to send the pull request to.
1495 send_pull_request (const struct GNUNET_PeerIdentity *peer)
1497 struct GNUNET_MQ_Envelope *ev;
1499 GNUNET_assert (GNUNET_NO == Peers_check_peer_flag (peer,
1500 Peers_PULL_REPLY_PENDING));
1501 Peers_set_peer_flag (peer, Peers_PULL_REPLY_PENDING);
1503 LOG (GNUNET_ERROR_TYPE_DEBUG,
1504 "Going to send PULL REQUEST to peer %s.\n",
1507 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1508 Peers_send_message (peer, ev, "PULL REQUEST");
1515 * @param peer_id the peer to send the push to.
1518 send_push (const struct GNUNET_PeerIdentity *peer_id)
1520 struct GNUNET_MQ_Envelope *ev;
1522 LOG (GNUNET_ERROR_TYPE_DEBUG,
1523 "Going to send PUSH to peer %s.\n",
1524 GNUNET_i2s (peer_id));
1526 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1527 Peers_send_message (peer_id, ev, "PUSH");
1532 do_round (void *cls);
1535 do_mal_round (void *cls);
1538 #ifdef ENABLE_MALICIOUS
1540 * Turn RPS service to act malicious.
1542 * @param cls Closure
1543 * @param client The client that sent the message
1544 * @param msg The message header
1547 handle_client_act_malicious (void *cls,
1548 struct GNUNET_SERVER_Client *client,
1549 const struct GNUNET_MessageHeader *msg)
1551 struct GNUNET_RPS_CS_ActMaliciousMessage *in_msg;
1552 struct GNUNET_PeerIdentity *peers;
1553 uint32_t num_mal_peers_sent;
1554 uint32_t num_mal_peers_old;
1556 /* Check for protocol violation */
1557 if (sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage) > ntohs (msg->size))
1559 GNUNET_break_op (0);
1562 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1563 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1564 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1566 LOG (GNUNET_ERROR_TYPE_ERROR,
1567 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
1568 ntohl (in_msg->num_peers),
1569 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1570 sizeof (struct GNUNET_PeerIdentity));
1571 GNUNET_break_op (0);
1575 /* Do actual logic */
1576 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1577 mal_type = ntohl (in_msg->type);
1578 if (NULL == mal_peer_set)
1579 mal_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1581 LOG (GNUNET_ERROR_TYPE_DEBUG,
1582 "Now acting malicious type %" PRIu32 ", got %" PRIu32 " peers.\n",
1584 ntohl (in_msg->num_peers));
1587 { /* Try to maximise representation */
1588 /* Add other malicious peers to those we already know */
1590 num_mal_peers_sent = ntohl (in_msg->num_peers);
1591 num_mal_peers_old = num_mal_peers;
1592 GNUNET_array_grow (mal_peers,
1594 num_mal_peers + num_mal_peers_sent);
1595 memcpy (&mal_peers[num_mal_peers_old],
1597 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1599 /* Add all mal peers to mal_peer_set */
1600 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1604 /* Substitute do_round () with do_mal_round () */
1605 GNUNET_SCHEDULER_cancel (do_round_task);
1606 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1609 else if ( (2 == mal_type) ||
1611 { /* Try to partition the network */
1612 /* Add other malicious peers to those we already know */
1614 num_mal_peers_sent = ntohl (in_msg->num_peers) - 1;
1615 num_mal_peers_old = num_mal_peers;
1616 GNUNET_array_grow (mal_peers,
1618 num_mal_peers + num_mal_peers_sent);
1619 if (NULL != mal_peers &&
1622 memcpy (&mal_peers[num_mal_peers_old],
1624 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1626 /* Add all mal peers to mal_peer_set */
1627 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1632 /* Store the one attacked peer */
1633 memcpy (&attacked_peer,
1634 &in_msg->attacked_peer,
1635 sizeof (struct GNUNET_PeerIdentity));
1636 /* Set the flag of the attacked peer to valid to avoid problems */
1637 if (GNUNET_NO == Peers_check_peer_known (&attacked_peer))
1639 Peers_check_peer_live (&attacked_peer);
1640 Peers_issue_peer_liveliness_check (&attacked_peer);
1643 LOG (GNUNET_ERROR_TYPE_DEBUG,
1644 "Attacked peer is %s\n",
1645 GNUNET_i2s (&attacked_peer));
1647 /* Substitute do_round () with do_mal_round () */
1648 GNUNET_SCHEDULER_cancel (do_round_task);
1649 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1651 else if (0 == mal_type)
1652 { /* Stop acting malicious */
1653 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
1655 /* Substitute do_mal_round () with do_round () */
1656 GNUNET_SCHEDULER_cancel (do_round_task);
1657 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1663 GNUNET_SERVER_receive_done (client,
1669 * Send out PUSHes and PULLs maliciously.
1671 * This is executed regylary.
1674 do_mal_round (void *cls)
1676 uint32_t num_pushes;
1678 struct GNUNET_TIME_Relative time_next_round;
1679 struct AttackedPeer *tmp_att_peer;
1681 LOG (GNUNET_ERROR_TYPE_DEBUG,
1682 "Going to execute next round maliciously type %" PRIu32 ".\n",
1684 do_round_task = NULL;
1685 GNUNET_assert (mal_type <= 3);
1686 /* Do malicious actions */
1688 { /* Try to maximise representation */
1690 /* The maximum of pushes we're going to send this round */
1691 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit,
1692 num_attacked_peers),
1693 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1695 LOG (GNUNET_ERROR_TYPE_DEBUG,
1696 "Going to send %" PRIu32 " pushes\n",
1699 /* Send PUSHes to attacked peers */
1700 for (i = 0 ; i < num_pushes ; i++)
1702 if (att_peers_tail == att_peer_index)
1703 att_peer_index = att_peers_head;
1705 att_peer_index = att_peer_index->next;
1707 send_push (&att_peer_index->peer_id);
1710 /* Send PULLs to some peers to learn about additional peers to attack */
1711 tmp_att_peer = att_peer_index;
1712 for (i = 0 ; i < num_pushes * alpha ; i++)
1714 if (att_peers_tail == tmp_att_peer)
1715 tmp_att_peer = att_peers_head;
1717 att_peer_index = tmp_att_peer->next;
1719 send_pull_request (&tmp_att_peer->peer_id);
1724 else if (2 == mal_type)
1726 * Try to partition the network
1727 * Send as many pushes to the attacked peer as possible
1728 * That is one push per round as it will ignore more.
1730 Peers_check_peer_live (&attacked_peer);
1731 if (GNUNET_YES == Peers_check_peer_valid (&attacked_peer))
1732 send_push (&attacked_peer);
1737 { /* Combined attack */
1739 /* Send PUSH to attacked peers */
1740 if (GNUNET_YES == Peers_check_peer_known (&attacked_peer))
1742 Peers_check_peer_live (&attacked_peer);
1743 if (GNUNET_YES == Peers_check_peer_valid (&attacked_peer))
1745 LOG (GNUNET_ERROR_TYPE_DEBUG,
1746 "Goding to send push to attacked peer (%s)\n",
1747 GNUNET_i2s (&attacked_peer));
1748 send_push (&attacked_peer);
1751 Peers_issue_peer_liveliness_check (&attacked_peer);
1754 Peers_check_peer_live (&attacked_peer);
1755 Peers_issue_peer_liveliness_check (&attacked_peer);
1757 /* The maximum of pushes we're going to send this round */
1758 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit - 1,
1759 num_attacked_peers),
1760 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1762 LOG (GNUNET_ERROR_TYPE_DEBUG,
1763 "Going to send %" PRIu32 " pushes\n",
1766 for (i = 0; i < num_pushes; i++)
1768 if (att_peers_tail == att_peer_index)
1769 att_peer_index = att_peers_head;
1771 att_peer_index = att_peer_index->next;
1773 send_push (&att_peer_index->peer_id);
1776 /* Send PULLs to some peers to learn about additional peers to attack */
1777 tmp_att_peer = att_peer_index;
1778 for (i = 0; i < num_pushes * alpha; i++)
1780 if (att_peers_tail == tmp_att_peer)
1781 tmp_att_peer = att_peers_head;
1783 att_peer_index = tmp_att_peer->next;
1785 send_pull_request (&tmp_att_peer->peer_id);
1789 /* Schedule next round */
1790 time_next_round = compute_rand_delay (round_interval, 2);
1792 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round,
1794 GNUNET_assert (NULL == do_round_task);
1795 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
1796 &do_mal_round, NULL);
1797 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1799 #endif /* ENABLE_MALICIOUS */
1803 * Send out PUSHes and PULLs, possibly update #view, samplers.
1805 * This is executed regylary.
1808 do_round (void *cls)
1811 const struct GNUNET_PeerIdentity *view_array;
1812 unsigned int *permut;
1813 unsigned int a_peers; /* Number of peers we send pushes to */
1814 unsigned int b_peers; /* Number of peers we send pull requests to */
1815 uint32_t first_border;
1816 uint32_t second_border;
1817 struct GNUNET_PeerIdentity peer;
1818 struct GNUNET_PeerIdentity *update_peer;
1820 LOG (GNUNET_ERROR_TYPE_DEBUG,
1821 "Going to execute next round.\n");
1822 do_round_task = NULL;
1823 LOG (GNUNET_ERROR_TYPE_DEBUG,
1824 "Printing view:\n");
1825 to_file (file_name_view_log,
1826 "___ new round ___");
1827 view_array = View_get_as_array ();
1828 for (i = 0; i < View_size (); i++)
1830 LOG (GNUNET_ERROR_TYPE_DEBUG,
1831 "\t%s\n", GNUNET_i2s (&view_array[i]));
1832 to_file (file_name_view_log,
1834 GNUNET_i2s_full (&view_array[i]));
1838 /* Send pushes and pull requests */
1839 if (0 < View_size ())
1841 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1845 a_peers = ceil (alpha * View_size ());
1847 LOG (GNUNET_ERROR_TYPE_DEBUG,
1848 "Going to send pushes to %u (ceil (%f * %u)) peers.\n",
1849 a_peers, alpha, View_size ());
1850 for (i = 0; i < a_peers; i++)
1852 peer = view_array[permut[i]];
1853 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1854 { // FIXME if this fails schedule/loop this for later
1859 /* Send PULL requests */
1860 b_peers = ceil (beta * View_size ());
1861 first_border = a_peers;
1862 second_border = a_peers + b_peers;
1863 if (second_border > View_size ())
1865 first_border = View_size () - b_peers;
1866 second_border = View_size ();
1868 LOG (GNUNET_ERROR_TYPE_DEBUG,
1869 "Going to send pulls to %u (ceil (%f * %u)) peers.\n",
1870 b_peers, beta, View_size ());
1871 for (i = first_border; i < second_border; i++)
1873 peer = view_array[permut[i]];
1874 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer) &&
1875 GNUNET_NO == Peers_check_peer_flag (&peer, Peers_PULL_REPLY_PENDING)) // TODO
1876 { // FIXME if this fails schedule/loop this for later
1877 send_pull_request (&peer);
1881 GNUNET_free (permut);
1887 /* TODO see how many peers are in push-/pull- list! */
1889 if ((CustomPeerMap_size (push_map) <= alpha * View_size ()) &&
1890 (0 < CustomPeerMap_size (push_map)) &&
1891 (0 < CustomPeerMap_size (pull_map)))
1892 { /* If conditions for update are fulfilled, update */
1893 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the view.\n");
1895 uint32_t final_size;
1896 uint32_t peers_to_clean_size;
1897 struct GNUNET_PeerIdentity *peers_to_clean;
1899 peers_to_clean = NULL;
1900 peers_to_clean_size = 0;
1901 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, View_size ());
1902 memcpy (peers_to_clean,
1904 View_size () * sizeof (struct GNUNET_PeerIdentity));
1906 /* Seems like recreating is the easiest way of emptying the peermap */
1908 to_file (file_name_view_log,
1911 first_border = GNUNET_MIN (ceil (alpha * sampler_size_est_need),
1912 CustomPeerMap_size (push_map));
1913 second_border = first_border +
1914 GNUNET_MIN (floor (beta * sampler_size_est_need),
1915 CustomPeerMap_size (pull_map));
1916 final_size = second_border +
1917 ceil ((1 - (alpha + beta)) * sampler_size_est_need);
1919 /* Update view with peers received through PUSHes */
1920 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1921 CustomPeerMap_size (push_map));
1922 for (i = 0; i < first_border; i++)
1924 (void) insert_in_view (CustomPeerMap_get_peer_by_index (push_map,
1926 to_file (file_name_view_log,
1928 GNUNET_i2s_full (&view_array[i]));
1929 // TODO change the peer_flags accordingly
1931 GNUNET_free (permut);
1934 /* Update view with peers received through PULLs */
1935 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1936 CustomPeerMap_size (pull_map));
1937 for (i = first_border; i < second_border; i++)
1939 (void) insert_in_view (CustomPeerMap_get_peer_by_index (pull_map,
1940 permut[i - first_border]));
1941 to_file (file_name_view_log,
1943 GNUNET_i2s_full (&view_array[i]));
1944 // TODO change the peer_flags accordingly
1946 GNUNET_free (permut);
1949 /* Update view with peers from history */
1950 RPS_sampler_get_n_rand_peers (prot_sampler,
1953 final_size - second_border);
1954 // TODO change the peer_flags accordingly
1956 for (i = 0; i < View_size (); i++)
1957 rem_from_list (&peers_to_clean, &peers_to_clean_size, &view_array[i]);
1959 /* Clean peers that were removed from the view */
1960 for (i = 0; i < peers_to_clean_size; i++)
1962 to_file (file_name_view_log,
1964 GNUNET_i2s_full (&peers_to_clean[i]));
1965 Peers_clean_peer (&peers_to_clean[i]);
1966 //peer_destroy_channel_send (sender);
1969 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, 0);
1970 peers_to_clean = NULL;
1974 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the view.\n");
1976 // TODO independent of that also get some peers from CADET_get_peers()?
1978 LOG (GNUNET_ERROR_TYPE_DEBUG,
1979 "Received %u pushes and %u pulls last round (alpha (%.2f) * view_size (%u) = %.2f)\n",
1980 CustomPeerMap_size (push_map),
1981 CustomPeerMap_size (pull_map),
1984 alpha * View_size ());
1986 /* Update samplers */
1987 for (i = 0; i < CustomPeerMap_size (push_map); i++)
1989 update_peer = CustomPeerMap_get_peer_by_index (push_map, i);
1990 LOG (GNUNET_ERROR_TYPE_DEBUG,
1991 "Updating with peer %s from push list\n",
1992 GNUNET_i2s (update_peer));
1993 insert_in_sampler (NULL, update_peer);
1994 Peers_clean_peer (update_peer); /* This cleans only if it is not in the view */
1995 //peer_destroy_channel_send (sender);
1998 for (i = 0; i < CustomPeerMap_size (pull_map); i++)
2000 LOG (GNUNET_ERROR_TYPE_DEBUG,
2001 "Updating with peer %s from pull list\n",
2002 GNUNET_i2s (CustomPeerMap_get_peer_by_index (pull_map, i)));
2003 insert_in_sampler (NULL, CustomPeerMap_get_peer_by_index (pull_map, i));
2004 /* This cleans only if it is not in the view */
2005 Peers_clean_peer (CustomPeerMap_get_peer_by_index (pull_map, i));
2006 //peer_destroy_channel_send (sender);
2010 /* Empty push/pull lists */
2011 CustomPeerMap_clear (push_map);
2012 CustomPeerMap_clear (pull_map);
2014 struct GNUNET_TIME_Relative time_next_round;
2016 time_next_round = compute_rand_delay (round_interval, 2);
2018 /* Schedule next round */
2019 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
2021 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
2026 rps_start (struct GNUNET_SERVER_Handle *server);
2030 * This is called from GNUNET_CADET_get_peers().
2032 * It is called on every peer(ID) that cadet somehow has contact with.
2033 * We use those to initialise the sampler.
2036 init_peer_cb (void *cls,
2037 const struct GNUNET_PeerIdentity *peer,
2038 int tunnel, // "Do we have a tunnel towards this peer?"
2039 unsigned int n_paths, // "Number of known paths towards this peer"
2040 unsigned int best_path) // "How long is the best path?
2041 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
2045 LOG (GNUNET_ERROR_TYPE_DEBUG,
2046 "Got peer_id %s from cadet\n",
2053 * @brief Iterator function over stored, valid peers.
2055 * We initialise the sampler with those.
2057 * @param cls the closure
2058 * @param peer the peer id
2059 * @return #GNUNET_YES if we should continue to
2061 * #GNUNET_NO if not.
2064 valid_peers_iterator (void *cls,
2065 const struct GNUNET_PeerIdentity *peer)
2069 LOG (GNUNET_ERROR_TYPE_DEBUG,
2070 "Got stored, valid peer %s\n",
2079 * Iterator over peers from peerinfo.
2081 * @param cls closure
2082 * @param peer id of the peer, NULL for last call
2083 * @param hello hello message for the peer (can be NULL)
2084 * @param error message
2087 process_peerinfo_peers (void *cls,
2088 const struct GNUNET_PeerIdentity *peer,
2089 const struct GNUNET_HELLO_Message *hello,
2090 const char *err_msg)
2094 LOG (GNUNET_ERROR_TYPE_DEBUG,
2095 "Got peer_id %s from peerinfo\n",
2103 * Task run during shutdown.
2108 shutdown_task (void *cls)
2110 LOG (GNUNET_ERROR_TYPE_DEBUG,
2111 "RPS is going down\n");
2112 GNUNET_PEERINFO_notify_cancel (peerinfo_notify_handle);
2113 GNUNET_PEERINFO_disconnect (peerinfo_handle);
2115 if (NULL != do_round_task)
2117 GNUNET_SCHEDULER_cancel (do_round_task);
2118 do_round_task = NULL;
2123 GNUNET_NSE_disconnect (nse);
2124 RPS_sampler_destroy (prot_sampler);
2125 RPS_sampler_destroy (client_sampler);
2126 GNUNET_CADET_disconnect (cadet_handle);
2128 CustomPeerMap_destroy (push_map);
2129 CustomPeerMap_destroy (pull_map);
2130 #ifdef ENABLE_MALICIOUS
2131 struct AttackedPeer *tmp_att_peer;
2132 GNUNET_free (file_name_view_log);
2133 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
2134 if (NULL != mal_peer_set)
2135 GNUNET_CONTAINER_multipeermap_destroy (mal_peer_set);
2136 if (NULL != att_peer_set)
2137 GNUNET_CONTAINER_multipeermap_destroy (att_peer_set);
2138 while (NULL != att_peers_head)
2140 tmp_att_peer = att_peers_head;
2141 GNUNET_CONTAINER_DLL_remove (att_peers_head, att_peers_tail, tmp_att_peer);
2143 #endif /* ENABLE_MALICIOUS */
2148 * @brief Get informed about a connecting client.
2151 * @param client the client that connects
2154 handle_client_connect (void *cls,
2155 struct GNUNET_SERVER_Client *client)
2157 struct ClientContext *cli_ctx;
2159 LOG (GNUNET_ERROR_TYPE_DEBUG,
2160 "Client connected\n");
2162 return; /* Server was destroyed before a client connected. Shutting down */
2163 cli_ctx = GNUNET_new (struct ClientContext);
2164 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
2165 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
2166 GNUNET_CONTAINER_DLL_insert (cli_ctx_head,
2172 * A client disconnected. Remove all of its data structure entries.
2174 * @param cls closure, NULL
2175 * @param client identification of the client
2178 handle_client_disconnect (void *cls,
2179 struct GNUNET_SERVER_Client *client)
2181 struct ClientContext *cli_ctx;
2184 {/* shutdown task */
2185 while (NULL != cli_ctx_head)
2186 destroy_cli_ctx (cli_ctx_head);
2190 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
2191 destroy_cli_ctx (cli_ctx);
2197 * Actually start the service.
2200 rps_start (struct GNUNET_SERVER_Handle *server)
2202 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
2203 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
2204 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
2205 {&handle_client_request_cancel, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST_CANCEL,
2206 sizeof (struct GNUNET_RPS_CS_RequestCancelMessage)},
2207 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
2208 #ifdef ENABLE_MALICIOUS
2209 {&handle_client_act_malicious, NULL, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
2210 #endif /* ENABLE_MALICIOUS */
2214 GNUNET_SERVER_add_handlers (server, handlers);
2215 GNUNET_SERVER_connect_notify (server,
2216 &handle_client_connect,
2218 GNUNET_SERVER_disconnect_notify (server,
2219 &handle_client_disconnect,
2221 LOG (GNUNET_ERROR_TYPE_INFO, "Ready to receive requests from clients\n");
2224 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
2225 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
2227 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
2233 * Process statistics requests.
2235 * @param cls closure
2236 * @param server the initialized server
2237 * @param c configuration to use
2241 struct GNUNET_SERVER_Handle *server,
2242 const struct GNUNET_CONFIGURATION_Handle *c)
2246 char* fn_valid_peers;
2248 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2253 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2254 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2255 "STARTING SERVICE (rps) for peer [%s]\n",
2256 GNUNET_i2s (&own_identity));
2257 #ifdef ENABLE_MALICIOUS
2258 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2259 "Malicious execution compiled in.\n");
2260 #endif /* ENABLE_MALICIOUS */
2264 /* Get time interval from the configuration */
2265 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2269 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2270 "RPS", "ROUNDINTERVAL");
2271 GNUNET_SCHEDULER_shutdown ();
2275 /* Get initial size of sampler/view from the configuration */
2277 GNUNET_CONFIGURATION_get_value_number (cfg, "RPS", "INITSIZE",
2278 (long long unsigned int *) &sampler_size_est_need))
2280 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2282 GNUNET_SCHEDULER_shutdown ();
2285 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %u\n", sampler_size_est_need);
2288 GNUNET_CONFIGURATION_get_value_filename (cfg,
2290 "FILENAME_VALID_PEERS",
2293 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2294 "rps", "FILENAME_VALID_PEERS");
2300 /* file_name_view_log */
2301 if (GNUNET_OK != GNUNET_DISK_directory_create ("/tmp/rps/"))
2303 LOG (GNUNET_ERROR_TYPE_WARNING,
2304 "Failed to create directory /tmp/rps/\n");
2307 size = (14 + strlen (GNUNET_i2s_full (&own_identity)) + 1) * sizeof (char);
2308 file_name_view_log = GNUNET_malloc (size);
2309 out_size = GNUNET_snprintf (file_name_view_log,
2312 GNUNET_i2s_full (&own_identity));
2313 if (size < out_size ||
2316 LOG (GNUNET_ERROR_TYPE_WARNING,
2317 "Failed to write string to buffer (size: %i, out_size: %i)\n",
2323 /* connect to NSE */
2324 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2331 /* Initialise cadet */
2332 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2333 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
2334 sizeof (struct GNUNET_MessageHeader)},
2335 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2336 sizeof (struct GNUNET_MessageHeader)},
2337 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
2340 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
2341 cadet_handle = GNUNET_CADET_connect (cfg,
2343 &Peers_handle_inbound_channel,
2344 &cleanup_destroyed_channel,
2348 peerinfo_handle = GNUNET_PEERINFO_connect (cfg);
2349 Peers_initialise (fn_valid_peers, cadet_handle, &own_identity);
2350 GNUNET_free (fn_valid_peers);
2352 /* Initialise sampler */
2353 struct GNUNET_TIME_Relative half_round_interval;
2354 struct GNUNET_TIME_Relative max_round_interval;
2356 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2357 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2359 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2360 client_sampler = RPS_sampler_mod_init (sampler_size_est_need, max_round_interval);
2362 /* Initialise push and pull maps */
2363 push_map = CustomPeerMap_create (4);
2364 pull_map = CustomPeerMap_create (4);
2367 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2368 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2369 // TODO send push/pull to each of those peers?
2370 // TODO read stored valid peers from last run
2371 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting stored valid peers\n");
2372 Peers_get_valid_peers (valid_peers_iterator, NULL);
2374 peerinfo_notify_handle = GNUNET_PEERINFO_notify (cfg,
2376 process_peerinfo_peers,
2384 * The main function for the rps service.
2386 * @param argc number of arguments from the command line
2387 * @param argv command line arguments
2388 * @return 0 ok, 1 on error
2391 main (int argc, char *const *argv)
2393 return (GNUNET_OK ==
2394 GNUNET_SERVICE_run (argc,
2397 GNUNET_SERVICE_OPTION_NONE,
2398 &run, NULL)) ? 0 : 1;
2401 /* end of gnunet-service-rps.c */