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22 * @file rps/gnunet-service-rps.c
23 * @brief rps service implementation
24 * @author Julius Bünger
27 #include "gnunet_applications.h"
28 #include "gnunet_util_lib.h"
29 #include "gnunet_cadet_service.h"
30 #include "gnunet_peerinfo_service.h"
31 #include "gnunet_nse_service.h"
33 #include "rps-test_util.h"
34 #include "gnunet-service-rps_sampler.h"
35 #include "gnunet-service-rps_custommap.h"
36 #include "gnunet-service-rps_peers.h"
37 #include "gnunet-service-rps_view.h"
42 #define LOG(kind, ...) GNUNET_log(kind, __VA_ARGS__)
44 // TODO modify @brief in every file
46 // TODO check for overflows
48 // TODO align message structs
50 // TODO connect to friends
52 // TODO store peers somewhere persistent
54 // TODO blacklist? (-> mal peer detection on top of brahms)
56 // hist_size_init, hist_size_max
61 static const struct GNUNET_CONFIGURATION_Handle *cfg;
66 static struct GNUNET_PeerIdentity own_identity;
69 /***********************************************************************
70 * Housekeeping with clients
71 ***********************************************************************/
74 * Closure used to pass the client and the id to the callback
75 * that replies to a client's request
82 struct ReplyCls *next;
83 struct ReplyCls *prev;
86 * The identifier of the request
91 * The handle to the request
93 struct RPS_SamplerRequestHandle *req_handle;
96 * The client handle to send the reply to
98 struct ClientContext *cli_ctx;
103 * Struct used to store the context of a connected client.
110 struct ClientContext *next;
111 struct ClientContext *prev;
114 * The message queue to communicate with the client.
116 struct GNUNET_MQ_Handle *mq;
119 * DLL with handles to single requests from the client
121 struct ReplyCls *rep_cls_head;
122 struct ReplyCls *rep_cls_tail;
125 * The client handle to send the reply to
127 struct GNUNET_SERVICE_Client *client;
131 * DLL with all clients currently connected to us
133 struct ClientContext *cli_ctx_head;
134 struct ClientContext *cli_ctx_tail;
136 /***********************************************************************
137 * /Housekeeping with clients
138 ***********************************************************************/
144 /***********************************************************************
146 ***********************************************************************/
149 * Sampler used for the Brahms protocol itself.
151 static struct RPS_Sampler *prot_sampler;
154 * Sampler used for the clients.
156 static struct RPS_Sampler *client_sampler;
159 * Name to log view to
161 static char *file_name_view_log;
164 * The size of sampler we need to be able to satisfy the client's need
167 static unsigned int sampler_size_client_need;
170 * The size of sampler we need to be able to satisfy the Brahms protocol's
171 * need of random peers.
173 * This is one minimum size the sampler grows to.
175 static unsigned int sampler_size_est_need;
178 * Percentage of total peer number in the view
179 * to send random PUSHes to
184 * Percentage of total peer number in the view
185 * to send random PULLs to
190 * Identifier for the main task that runs periodically.
192 static struct GNUNET_SCHEDULER_Task *do_round_task;
195 * Time inverval the do_round task runs in.
197 static struct GNUNET_TIME_Relative round_interval;
200 * List to store peers received through pushes temporary.
202 static struct CustomPeerMap *push_map;
205 * List to store peers received through pulls temporary.
207 static struct CustomPeerMap *pull_map;
212 static struct GNUNET_NSE_Handle *nse;
217 static struct GNUNET_CADET_Handle *cadet_handle;
220 * Handler to PEERINFO.
222 static struct GNUNET_PEERINFO_Handle *peerinfo_handle;
225 * Handle for cancellation of iteration over peers.
227 static struct GNUNET_PEERINFO_NotifyContext *peerinfo_notify_handle;
232 * Counts how many requets clients already issued.
233 * Only needed in the beginning to check how many of the 64 deltas
236 static unsigned int req_counter;
239 * Time of the last request we received.
241 * Used to compute the expected request rate.
243 static struct GNUNET_TIME_Absolute last_request;
246 * Size of #request_deltas.
248 #define REQUEST_DELTAS_SIZE 64
249 static unsigned int request_deltas_size = REQUEST_DELTAS_SIZE;
252 * Last 64 deltas between requests
254 static struct GNUNET_TIME_Relative request_deltas[REQUEST_DELTAS_SIZE];
257 * The prediction of the rate of requests
259 static struct GNUNET_TIME_Relative request_rate;
262 #ifdef ENABLE_MALICIOUS
264 * Type of malicious peer
266 * 0 Don't act malicious at all - Default
267 * 1 Try to maximise representation
268 * 2 Try to partition the network
271 static uint32_t mal_type;
274 * Other malicious peers
276 static struct GNUNET_PeerIdentity *mal_peers;
279 * Hashmap of malicious peers used as set.
280 * Used to more efficiently check whether we know that peer.
282 static struct GNUNET_CONTAINER_MultiPeerMap *mal_peer_set;
285 * Number of other malicious peers
287 static uint32_t num_mal_peers;
291 * If type is 2 This struct is used to store the attacked peers in a DLL
298 struct AttackedPeer *next;
299 struct AttackedPeer *prev;
304 struct GNUNET_PeerIdentity peer_id;
308 * If type is 2 this is the DLL of attacked peers
310 static struct AttackedPeer *att_peers_head;
311 static struct AttackedPeer *att_peers_tail;
314 * This index is used to point to an attacked peer to
315 * implement the round-robin-ish way to select attacked peers.
317 static struct AttackedPeer *att_peer_index;
320 * Hashmap of attacked peers used as set.
321 * Used to more efficiently check whether we know that peer.
323 static struct GNUNET_CONTAINER_MultiPeerMap *att_peer_set;
326 * Number of attacked peers
328 static uint32_t num_attacked_peers;
331 * If type is 1 this is the attacked peer
333 static struct GNUNET_PeerIdentity attacked_peer;
336 * The limit of PUSHes we can send in one round.
337 * This is an assumption of the Brahms protocol and either implemented
340 * assumend to be the bandwidth limitation.
342 static uint32_t push_limit = 10000;
343 #endif /* ENABLE_MALICIOUS */
346 /***********************************************************************
348 ***********************************************************************/
351 /***********************************************************************
353 ***********************************************************************/
357 * Print peerlist to log.
360 print_peer_list (struct GNUNET_PeerIdentity *list,
365 LOG (GNUNET_ERROR_TYPE_DEBUG,
366 "Printing peer list of length %u at %p:\n",
369 for (i = 0 ; i < len ; i++)
371 LOG (GNUNET_ERROR_TYPE_DEBUG,
373 i, GNUNET_i2s (&list[i]));
379 * Remove peer from list.
382 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
383 unsigned int *list_size,
384 const struct GNUNET_PeerIdentity *peer)
387 struct GNUNET_PeerIdentity *tmp;
391 LOG (GNUNET_ERROR_TYPE_DEBUG,
392 "Removing peer %s from list at %p\n",
396 for ( i = 0 ; i < *list_size ; i++ )
398 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
400 if (i < *list_size -1)
401 { /* Not at the last entry -- shift peers left */
402 memmove (&tmp[i], &tmp[i +1],
403 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
405 /* Remove last entry (should be now useless PeerID) */
406 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
414 * Sum all time relatives of an array.
416 static struct GNUNET_TIME_Relative
417 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array,
420 struct GNUNET_TIME_Relative sum;
423 sum = GNUNET_TIME_UNIT_ZERO;
424 for ( i = 0 ; i < arr_size ; i++ )
426 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
433 * Compute the average of given time relatives.
435 static struct GNUNET_TIME_Relative
436 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array,
439 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array,
446 * Insert PeerID in #view
448 * Called once we know a peer is live.
451 * @return GNUNET_OK if peer was actually inserted
452 * GNUNET_NO if peer was not inserted
455 insert_in_view_op (void *cls,
456 const struct GNUNET_PeerIdentity *peer);
459 * Insert PeerID in #view
461 * Called once we know a peer is live.
463 * @return GNUNET_OK if peer was actually inserted
464 * GNUNET_NO if peer was not inserted
467 insert_in_view (const struct GNUNET_PeerIdentity *peer)
471 online = Peers_check_peer_flag (peer, Peers_ONLINE);
472 if ( (GNUNET_NO == online) ||
473 (GNUNET_SYSERR == online) ) /* peer is not even known */
475 (void) Peers_issue_peer_liveliness_check (peer);
476 (void) Peers_schedule_operation (peer, insert_in_view_op);
479 /* Open channel towards peer to keep connection open */
480 Peers_indicate_sending_intention (peer);
481 return View_put (peer);
485 * Put random peer from sampler into the view as history update.
488 hist_update (void *cls,
489 struct GNUNET_PeerIdentity *ids,
494 for (i = 0; i < num_peers; i++)
496 (void) insert_in_view (&ids[i]);
497 to_file (file_name_view_log,
499 GNUNET_i2s_full (ids));
505 * Wrapper around #RPS_sampler_resize()
507 * If we do not have enough sampler elements, double current sampler size
508 * If we have more than enough sampler elements, halv current sampler size
511 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
513 unsigned int sampler_size;
516 // TODO respect the min, max
517 sampler_size = RPS_sampler_get_size (sampler);
518 if (sampler_size > new_size * 4)
520 RPS_sampler_resize (sampler, sampler_size / 2);
522 else if (sampler_size < new_size)
524 RPS_sampler_resize (sampler, sampler_size * 2);
526 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
531 * Wrapper around #RPS_sampler_resize() resizing the client sampler
534 client_resize_wrapper ()
536 uint32_t bigger_size;
540 bigger_size = GNUNET_MAX (sampler_size_est_need, sampler_size_client_need);
542 // TODO respect the min, max
543 resize_wrapper (client_sampler, bigger_size);
544 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size_client is now %" PRIu32 "\n",
550 * Estimate request rate
552 * Called every time we receive a request from the client.
557 struct GNUNET_TIME_Relative max_round_duration;
559 if (request_deltas_size > req_counter)
561 if ( 1 < req_counter)
563 /* Shift last request deltas to the right */
564 memmove (&request_deltas[1],
566 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
568 /* Add current delta to beginning */
570 GNUNET_TIME_absolute_get_difference (last_request,
571 GNUNET_TIME_absolute_get ());
572 request_rate = T_relative_avg (request_deltas, req_counter);
573 request_rate = (request_rate.rel_value_us < 1) ?
574 GNUNET_TIME_relative_get_unit_ () : request_rate;
576 /* Compute the duration a round will maximally take */
578 GNUNET_TIME_relative_add (round_interval,
579 GNUNET_TIME_relative_divide (round_interval, 2));
581 /* Set the estimated size the sampler has to have to
582 * satisfy the current client request rate */
583 sampler_size_client_need =
584 max_round_duration.rel_value_us / request_rate.rel_value_us;
586 /* Resize the sampler */
587 client_resize_wrapper ();
589 last_request = GNUNET_TIME_absolute_get ();
594 * Add all peers in @a peer_array to @a peer_map used as set.
596 * @param peer_array array containing the peers
597 * @param num_peers number of peers in @peer_array
598 * @param peer_map the peermap to use as set
601 add_peer_array_to_set (const struct GNUNET_PeerIdentity *peer_array,
602 unsigned int num_peers,
603 struct GNUNET_CONTAINER_MultiPeerMap *peer_map)
606 if (NULL == peer_map)
608 LOG (GNUNET_ERROR_TYPE_WARNING,
609 "Trying to add peers to non-existing peermap.\n");
613 for (i = 0; i < num_peers; i++)
615 GNUNET_CONTAINER_multipeermap_put (peer_map,
618 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
624 * Send a PULL REPLY to @a peer_id
626 * @param peer_id the peer to send the reply to.
627 * @param peer_ids the peers to send to @a peer_id
628 * @param num_peer_ids the number of peers to send to @a peer_id
631 send_pull_reply (const struct GNUNET_PeerIdentity *peer_id,
632 const struct GNUNET_PeerIdentity *peer_ids,
633 unsigned int num_peer_ids)
636 struct GNUNET_MQ_Envelope *ev;
637 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
639 /* Compute actual size */
640 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
641 num_peer_ids * sizeof (struct GNUNET_PeerIdentity);
643 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
644 /* Compute number of peers to send
645 * If too long, simply truncate */
646 // TODO select random ones via permutation
647 // or even better: do good protocol design
649 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
650 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
651 sizeof (struct GNUNET_PeerIdentity);
653 send_size = num_peer_ids;
655 LOG (GNUNET_ERROR_TYPE_DEBUG,
656 "Going to send PULL REPLY with %u peers to %s\n",
657 send_size, GNUNET_i2s (peer_id));
659 ev = GNUNET_MQ_msg_extra (out_msg,
660 send_size * sizeof (struct GNUNET_PeerIdentity),
661 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
662 out_msg->num_peers = htonl (send_size);
663 GNUNET_memcpy (&out_msg[1], peer_ids,
664 send_size * sizeof (struct GNUNET_PeerIdentity));
666 Peers_send_message (peer_id, ev, "PULL REPLY");
671 * Insert PeerID in #pull_map
673 * Called once we know a peer is live.
676 insert_in_pull_map (void *cls,
677 const struct GNUNET_PeerIdentity *peer)
679 CustomPeerMap_put (pull_map, peer);
684 * Insert PeerID in #view
686 * Called once we know a peer is live.
690 insert_in_view_op (void *cls,
691 const struct GNUNET_PeerIdentity *peer)
693 (void) insert_in_view (peer);
698 * Update sampler with given PeerID.
702 insert_in_sampler (void *cls,
703 const struct GNUNET_PeerIdentity *peer)
705 LOG (GNUNET_ERROR_TYPE_DEBUG,
706 "Updating samplers with peer %s from insert_in_sampler()\n",
708 RPS_sampler_update (prot_sampler, peer);
709 RPS_sampler_update (client_sampler, peer);
710 if (0 < RPS_sampler_count_id (prot_sampler, peer))
712 /* Make sure we 'know' about this peer */
713 (void) Peers_issue_peer_liveliness_check (peer);
714 /* Establish a channel towards that peer to indicate we are going to send
716 //Peers_indicate_sending_intention (peer);
721 * @brief This is called on peers from external sources (cadet, peerinfo, ...)
722 * If the peer is not known, liveliness check is issued and it is
723 * scheduled to be inserted in sampler and view.
725 * "External sources" refer to every source except the gossip.
727 * @param peer peer to insert
730 got_peer (const struct GNUNET_PeerIdentity *peer)
732 /* If we did not know this peer already, insert it into sampler and view */
733 if (GNUNET_YES == Peers_issue_peer_liveliness_check (peer))
735 Peers_schedule_operation (peer, insert_in_sampler);
736 Peers_schedule_operation (peer, insert_in_view_op);
741 * @brief Checks if there is a sending channel and if it is needed
743 * @param peer the peer whose sending channel is checked
744 * @return GNUNET_YES if sending channel exists and is still needed
745 * GNUNET_NO otherwise
748 check_sending_channel_needed (const struct GNUNET_PeerIdentity *peer)
750 /* struct GNUNET_CADET_Channel *channel; */
751 if (GNUNET_NO == Peers_check_peer_known (peer))
755 if (GNUNET_YES == Peers_check_sending_channel_exists (peer))
757 if ( (0 < RPS_sampler_count_id (prot_sampler, peer)) ||
758 (GNUNET_YES == View_contains_peer (peer)) ||
759 (GNUNET_YES == CustomPeerMap_contains_peer (push_map, peer)) ||
760 (GNUNET_YES == CustomPeerMap_contains_peer (pull_map, peer)) ||
761 (GNUNET_YES == Peers_check_peer_flag (peer, Peers_PULL_REPLY_PENDING)))
762 { /* If we want to keep the connection to peer open */
771 * @brief remove peer from our knowledge, the view, push and pull maps and
774 * @param peer the peer to remove
777 remove_peer (const struct GNUNET_PeerIdentity *peer)
779 (void) View_remove_peer (peer);
780 CustomPeerMap_remove_peer (pull_map, peer);
781 CustomPeerMap_remove_peer (push_map, peer);
782 RPS_sampler_reinitialise_by_value (prot_sampler, peer);
783 RPS_sampler_reinitialise_by_value (client_sampler, peer);
784 Peers_remove_peer (peer);
789 * @brief Remove data that is not needed anymore.
791 * If the sending channel is no longer needed it is destroyed.
793 * @param peer the peer whose data is about to be cleaned
796 clean_peer (const struct GNUNET_PeerIdentity *peer)
798 if (GNUNET_NO == check_sending_channel_needed (peer))
800 LOG (GNUNET_ERROR_TYPE_DEBUG,
801 "Going to remove send channel to peer %s\n",
803 #ifdef ENABLE_MALICIOUS
804 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
805 (void) Peers_destroy_sending_channel (peer);
806 #else /* ENABLE_MALICIOUS */
807 (void) Peers_destroy_sending_channel (peer);
808 #endif /* ENABLE_MALICIOUS */
811 if ( (GNUNET_NO == Peers_check_peer_send_intention (peer)) &&
812 (GNUNET_NO == View_contains_peer (peer)) &&
813 (GNUNET_NO == CustomPeerMap_contains_peer (push_map, peer)) &&
814 (GNUNET_NO == CustomPeerMap_contains_peer (push_map, peer)) &&
815 (0 == RPS_sampler_count_id (prot_sampler, peer)) &&
816 (0 == RPS_sampler_count_id (client_sampler, peer)) &&
817 (GNUNET_NO != Peers_check_removable (peer)) )
818 { /* We can safely remove this peer */
819 LOG (GNUNET_ERROR_TYPE_DEBUG,
820 "Going to remove peer %s\n",
828 * @brief This is called when a channel is destroyed.
830 * Removes peer completely from our knowledge if the send_channel was destroyed
831 * Otherwise simply delete the recv_channel
832 * Also check if the knowledge about this peer is still needed.
833 * If not, remove this peer from our knowledge.
835 * @param cls The closure
836 * @param channel The channel being closed
837 * @param channel_ctx The context associated with this channel
840 cleanup_destroyed_channel (void *cls,
841 const struct GNUNET_CADET_Channel *channel,
844 struct GNUNET_PeerIdentity *peer;
846 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
847 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
848 // FIXME wait for cadet to change this function
850 if (GNUNET_NO == Peers_check_peer_known (peer))
851 { /* We don't know a context to that peer */
852 LOG (GNUNET_ERROR_TYPE_WARNING,
853 "channel (%s) without associated context was destroyed\n",
858 if (GNUNET_YES == Peers_check_peer_flag (peer, Peers_TO_DESTROY))
859 { /* We are in the middle of removing that peer from our knowledge. In this
860 case simply make sure that the channels are cleaned. */
861 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
862 to_file (file_name_view_log,
863 "-%s\t(cleanup channel, ourself)",
864 GNUNET_i2s_full (peer));
869 Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_SENDING))
870 { /* Channel used for sending was destroyed */
871 /* Possible causes of channel destruction:
872 * - ourselves -> cleaning send channel -> clean context
873 * - other peer -> peer probably went down -> remove
875 if (GNUNET_YES == Peers_check_channel_flag (channel_ctx, Peers_CHANNEL_CLEAN))
876 { /* We are about to clean the sending channel. Clean the respective
878 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
882 { /* Other peer destroyed our sending channel that he is supposed to keep
883 * open. It probably went down. Remove it from our knowledge. */
884 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
889 else if (GNUNET_YES ==
890 Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_RECEIVING))
891 { /* Channel used for receiving was destroyed */
892 /* Possible causes of channel destruction:
893 * - ourselves -> peer tried to establish channel twice -> clean context
894 * - other peer -> peer doesn't want to send us data -> clean
897 Peers_check_channel_flag (channel_ctx, Peers_CHANNEL_ESTABLISHED_TWICE))
898 { /* Other peer tried to establish a channel to us twice. We do not accept
899 * that. Clean the context. */
900 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
904 { /* Other peer doesn't want to send us data anymore. We are free to clean
906 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
913 LOG (GNUNET_ERROR_TYPE_WARNING,
914 "Destroyed channel is neither sending nor receiving channel\n");
918 /***********************************************************************
920 ***********************************************************************/
923 destroy_reply_cls (struct ReplyCls *rep_cls)
925 struct ClientContext *cli_ctx;
927 cli_ctx = rep_cls->cli_ctx;
928 GNUNET_assert (NULL != cli_ctx);
929 if (NULL != rep_cls->req_handle)
931 RPS_sampler_request_cancel (rep_cls->req_handle);
933 GNUNET_CONTAINER_DLL_remove (cli_ctx->rep_cls_head,
934 cli_ctx->rep_cls_tail,
936 GNUNET_free (rep_cls);
941 destroy_cli_ctx (struct ClientContext *cli_ctx)
943 GNUNET_assert (NULL != cli_ctx);
944 if (NULL != cli_ctx->rep_cls_head)
946 LOG (GNUNET_ERROR_TYPE_WARNING,
947 "Trying to destroy the context of a client that still has pending requests. Going to clean those\n");
948 while (NULL != cli_ctx->rep_cls_head)
949 destroy_reply_cls (cli_ctx->rep_cls_head);
951 GNUNET_CONTAINER_DLL_remove (cli_ctx_head,
954 GNUNET_free (cli_ctx);
959 * Function called by NSE.
961 * Updates sizes of sampler list and view and adapt those lists
965 nse_callback (void *cls,
966 struct GNUNET_TIME_Absolute timestamp,
967 double logestimate, double std_dev)
970 //double scale; // TODO this might go gloabal/config
972 LOG (GNUNET_ERROR_TYPE_DEBUG,
973 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
974 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
976 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
977 // GNUNET_NSE_log_estimate_to_n (logestimate);
978 estimate = pow (estimate, 1.0 / 3);
979 // TODO add if std_dev is a number
980 // estimate += (std_dev * scale);
981 if (2 < ceil (estimate))
983 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
984 sampler_size_est_need = estimate;
986 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
988 /* If the NSE has changed adapt the lists accordingly */
989 resize_wrapper (prot_sampler, sampler_size_est_need);
990 client_resize_wrapper ();
995 * Callback called once the requested PeerIDs are ready.
997 * Sends those to the requesting client.
1000 client_respond (void *cls,
1001 struct GNUNET_PeerIdentity *peer_ids,
1004 struct ReplyCls *reply_cls = cls;
1006 struct GNUNET_MQ_Envelope *ev;
1007 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
1008 uint32_t size_needed;
1009 struct ClientContext *cli_ctx;
1011 GNUNET_assert (NULL != reply_cls);
1012 LOG (GNUNET_ERROR_TYPE_DEBUG,
1013 "sampler returned %" PRIu32 " peers:\n",
1015 for (i = 0; i < num_peers; i++)
1017 LOG (GNUNET_ERROR_TYPE_DEBUG,
1018 " %" PRIu32 ": %s\n",
1020 GNUNET_i2s (&peer_ids[i]));
1023 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1024 num_peers * sizeof (struct GNUNET_PeerIdentity);
1026 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1028 ev = GNUNET_MQ_msg_extra (out_msg,
1029 num_peers * sizeof (struct GNUNET_PeerIdentity),
1030 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1031 out_msg->num_peers = htonl (num_peers);
1032 out_msg->id = htonl (reply_cls->id);
1034 GNUNET_memcpy (&out_msg[1],
1036 num_peers * sizeof (struct GNUNET_PeerIdentity));
1037 GNUNET_free (peer_ids);
1039 cli_ctx = reply_cls->cli_ctx;
1040 GNUNET_assert (NULL != cli_ctx);
1041 reply_cls->req_handle = NULL;
1042 destroy_reply_cls (reply_cls);
1043 GNUNET_MQ_send (cli_ctx->mq, ev);
1048 * Handle RPS request from the client.
1050 * @param cls closure
1051 * @param client identification of the client
1052 * @param message the actual message
1055 handle_client_request (void *cls,
1056 const struct GNUNET_RPS_CS_RequestMessage *msg)
1058 struct ClientContext *cli_ctx = cls;
1060 uint32_t size_needed;
1061 struct ReplyCls *reply_cls;
1064 num_peers = ntohl (msg->num_peers);
1065 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1066 num_peers * sizeof (struct GNUNET_PeerIdentity);
1068 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1070 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1071 "Message received from client has size larger than expected\n");
1072 GNUNET_SERVICE_client_drop (cli_ctx->client);
1076 for (i = 0 ; i < num_peers ; i++)
1079 LOG (GNUNET_ERROR_TYPE_DEBUG,
1080 "Client requested %" PRIu32 " random peer(s).\n",
1083 reply_cls = GNUNET_new (struct ReplyCls);
1084 reply_cls->id = ntohl (msg->id);
1085 reply_cls->cli_ctx = cli_ctx;
1086 reply_cls->req_handle = RPS_sampler_get_n_rand_peers (client_sampler,
1091 GNUNET_assert (NULL != cli_ctx);
1092 GNUNET_CONTAINER_DLL_insert (cli_ctx->rep_cls_head,
1093 cli_ctx->rep_cls_tail,
1095 GNUNET_SERVICE_client_continue (cli_ctx->client);
1100 * @brief Handle a message that requests the cancellation of a request
1103 * @param client the client that requests the cancellation
1104 * @param message the message containing the id of the request
1107 handle_client_request_cancel (void *cls,
1108 const struct GNUNET_RPS_CS_RequestCancelMessage *msg)
1110 struct ClientContext *cli_ctx = cls;
1111 struct ReplyCls *rep_cls;
1113 GNUNET_assert (NULL != cli_ctx);
1114 GNUNET_assert (NULL != cli_ctx->rep_cls_head);
1115 rep_cls = cli_ctx->rep_cls_head;
1116 LOG (GNUNET_ERROR_TYPE_DEBUG,
1117 "Client cancels request with id %" PRIu32 "\n",
1119 while ( (NULL != rep_cls->next) &&
1120 (rep_cls->id != ntohl (msg->id)) )
1121 rep_cls = rep_cls->next;
1122 GNUNET_assert (rep_cls->id == ntohl (msg->id));
1123 RPS_sampler_request_cancel (rep_cls->req_handle);
1124 destroy_reply_cls (rep_cls);
1125 GNUNET_SERVICE_client_continue (cli_ctx->client);
1130 * @brief This function is called, when the client seeds peers.
1131 * It verifies that @a msg is well-formed.
1133 * @param cls the closure (#ClientContext)
1134 * @param msg the message
1135 * @return #GNUNET_OK if @a msg is well-formed
1138 check_client_seed (void *cls, const struct GNUNET_RPS_CS_SeedMessage *msg)
1140 struct ClientContext *cli_ctx = cls;
1141 uint16_t msize = ntohs (msg->header.size);
1142 uint32_t num_peers = ntohl (msg->num_peers);
1144 msize -= sizeof (struct GNUNET_RPS_CS_SeedMessage);
1145 if ( (msize / sizeof (struct GNUNET_PeerIdentity) != num_peers) ||
1146 (msize % sizeof (struct GNUNET_PeerIdentity) != 0) )
1149 GNUNET_SERVICE_client_drop (cli_ctx->client);
1150 return GNUNET_SYSERR;
1157 * Handle seed from the client.
1159 * @param cls closure
1160 * @param client identification of the client
1161 * @param message the actual message
1164 handle_client_seed (void *cls,
1165 const struct GNUNET_RPS_CS_SeedMessage *msg)
1167 struct ClientContext *cli_ctx = cls;
1168 struct GNUNET_PeerIdentity *peers;
1172 num_peers = ntohl (msg->num_peers);
1173 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1174 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1175 //GNUNET_memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1177 LOG (GNUNET_ERROR_TYPE_DEBUG,
1178 "Client seeded peers:\n");
1179 print_peer_list (peers, num_peers);
1181 for (i = 0; i < num_peers; i++)
1183 LOG (GNUNET_ERROR_TYPE_DEBUG,
1184 "Updating samplers with seed %" PRIu32 ": %s\n",
1186 GNUNET_i2s (&peers[i]));
1188 got_peer (&peers[i]);
1191 ////GNUNET_free (peers);
1193 GNUNET_SERVICE_client_continue (cli_ctx->client);
1197 * Handle a CHECK_LIVE message from another peer.
1199 * This does nothing. But without calling #GNUNET_CADET_receive_done()
1200 * the channel is blocked for all other communication.
1202 * @param cls Closure
1203 * @param channel The channel the CHECK was received over
1204 * @param channel_ctx The context associated with this channel
1205 * @param msg The message header
1208 handle_peer_check (void *cls,
1209 struct GNUNET_CADET_Channel *channel,
1211 const struct GNUNET_MessageHeader *msg)
1213 GNUNET_CADET_receive_done (channel);
1218 * Handle a PUSH message from another peer.
1220 * Check the proof of work and store the PeerID
1221 * in the temporary list for pushed PeerIDs.
1223 * @param cls Closure
1224 * @param channel The channel the PUSH was received over
1225 * @param channel_ctx The context associated with this channel
1226 * @param msg The message header
1229 handle_peer_push (void *cls,
1230 struct GNUNET_CADET_Channel *channel,
1232 const struct GNUNET_MessageHeader *msg)
1234 const struct GNUNET_PeerIdentity *peer;
1236 // (check the proof of work (?))
1238 peer = (const struct GNUNET_PeerIdentity *)
1239 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1240 // FIXME wait for cadet to change this function
1242 LOG (GNUNET_ERROR_TYPE_DEBUG,
1243 "Received PUSH (%s)\n",
1246 #ifdef ENABLE_MALICIOUS
1247 struct AttackedPeer *tmp_att_peer;
1249 if ( (1 == mal_type) ||
1251 { /* Try to maximise representation */
1252 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1253 GNUNET_memcpy (&tmp_att_peer->peer_id, peer, sizeof (struct GNUNET_PeerIdentity));
1254 if (NULL == att_peer_set)
1255 att_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1256 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1259 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1262 add_peer_array_to_set (peer, 1, att_peer_set);
1264 GNUNET_CADET_receive_done (channel);
1269 else if (2 == mal_type)
1270 { /* We attack one single well-known peer - simply ignore */
1271 GNUNET_CADET_receive_done (channel);
1274 #endif /* ENABLE_MALICIOUS */
1276 /* Add the sending peer to the push_map */
1277 CustomPeerMap_put (push_map, peer);
1279 GNUNET_CADET_receive_done (channel);
1285 * Handle PULL REQUEST request message from another peer.
1287 * Reply with the view of PeerIDs.
1289 * @param cls Closure
1290 * @param channel The channel the PULL REQUEST was received over
1291 * @param channel_ctx The context associated with this channel
1292 * @param msg The message header
1295 handle_peer_pull_request (void *cls,
1296 struct GNUNET_CADET_Channel *channel,
1298 const struct GNUNET_MessageHeader *msg)
1300 struct GNUNET_PeerIdentity *peer;
1301 const struct GNUNET_PeerIdentity *view_array;
1303 peer = (struct GNUNET_PeerIdentity *)
1304 GNUNET_CADET_channel_get_info (channel,
1305 GNUNET_CADET_OPTION_PEER);
1306 // FIXME wait for cadet to change this function
1308 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REQUEST (%s)\n", GNUNET_i2s (peer));
1310 #ifdef ENABLE_MALICIOUS
1313 { /* Try to maximise representation */
1314 send_pull_reply (peer, mal_peers, num_mal_peers);
1315 GNUNET_CADET_receive_done (channel);
1319 else if (2 == mal_type)
1320 { /* Try to partition network */
1321 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
1323 send_pull_reply (peer, mal_peers, num_mal_peers);
1325 GNUNET_CADET_receive_done (channel);
1328 #endif /* ENABLE_MALICIOUS */
1330 view_array = View_get_as_array ();
1332 send_pull_reply (peer, view_array, View_size ());
1334 GNUNET_CADET_receive_done (channel);
1340 * Handle PULL REPLY message from another peer.
1342 * Check whether we sent a corresponding request and
1343 * whether this reply is the first one.
1345 * @param cls Closure
1346 * @param channel The channel the PUSH was received over
1347 * @param channel_ctx The context associated with this channel
1348 * @param msg The message header
1351 handle_peer_pull_reply (void *cls,
1352 struct GNUNET_CADET_Channel *channel,
1354 const struct GNUNET_MessageHeader *msg)
1356 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1357 struct GNUNET_PeerIdentity *peers;
1358 struct GNUNET_PeerIdentity *sender;
1360 #ifdef ENABLE_MALICIOUS
1361 struct AttackedPeer *tmp_att_peer;
1362 #endif /* ENABLE_MALICIOUS */
1364 /* Check for protocol violation */
1365 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1367 GNUNET_break_op (0);
1368 GNUNET_CADET_receive_done (channel);
1369 return GNUNET_SYSERR;
1372 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1373 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1374 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1376 LOG (GNUNET_ERROR_TYPE_ERROR,
1377 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
1378 ntohl (in_msg->num_peers),
1379 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1380 sizeof (struct GNUNET_PeerIdentity));
1381 GNUNET_break_op (0);
1382 GNUNET_CADET_receive_done (channel);
1383 return GNUNET_SYSERR;
1386 // Guess simply casting isn't the nicest way...
1387 // FIXME wait for cadet to change this function
1388 sender = (struct GNUNET_PeerIdentity *)
1389 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1391 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REPLY (%s)\n", GNUNET_i2s (sender));
1393 if (GNUNET_YES != Peers_check_peer_flag (sender, Peers_PULL_REPLY_PENDING))
1395 LOG (GNUNET_ERROR_TYPE_WARNING,
1396 "Received a pull reply from a peer we didn't request one from!\n");
1397 GNUNET_CADET_receive_done (channel);
1398 GNUNET_break_op (0);
1403 #ifdef ENABLE_MALICIOUS
1404 // We shouldn't even receive pull replies as we're not sending
1407 GNUNET_CADET_receive_done (channel);
1410 #endif /* ENABLE_MALICIOUS */
1412 /* Do actual logic */
1413 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1415 LOG (GNUNET_ERROR_TYPE_DEBUG,
1416 "PULL REPLY received, got following %u peers:\n",
1417 ntohl (in_msg->num_peers));
1419 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1421 LOG (GNUNET_ERROR_TYPE_DEBUG,
1424 GNUNET_i2s (&peers[i]));
1426 #ifdef ENABLE_MALICIOUS
1427 if ((NULL != att_peer_set) &&
1428 (1 == mal_type || 3 == mal_type))
1429 { /* Add attacked peer to local list */
1430 // TODO check if we sent a request and this was the first reply
1431 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1433 && GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (mal_peer_set,
1435 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&peers[i],
1438 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1439 tmp_att_peer->peer_id = peers[i];
1440 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1443 add_peer_array_to_set (&peers[i], 1, att_peer_set);
1447 #endif /* ENABLE_MALICIOUS */
1448 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity,
1451 /* Make sure we 'know' about this peer */
1452 (void) Peers_insert_peer (&peers[i]);
1454 if (GNUNET_YES == Peers_check_peer_valid (&peers[i]))
1456 CustomPeerMap_put (pull_map, &peers[i]);
1460 Peers_schedule_operation (&peers[i], insert_in_pull_map);
1461 (void) Peers_issue_peer_liveliness_check (&peers[i]);
1466 Peers_unset_peer_flag (sender, Peers_PULL_REPLY_PENDING);
1467 clean_peer (sender);
1469 GNUNET_CADET_receive_done (channel);
1475 * Compute a random delay.
1476 * A uniformly distributed value between mean + spread and mean - spread.
1478 * For example for mean 4 min and spread 2 the minimum is (4 min - (1/2 * 4 min))
1479 * It would return a random value between 2 and 6 min.
1481 * @param mean the mean
1482 * @param spread the inverse amount of deviation from the mean
1484 static struct GNUNET_TIME_Relative
1485 compute_rand_delay (struct GNUNET_TIME_Relative mean,
1486 unsigned int spread)
1488 struct GNUNET_TIME_Relative half_interval;
1489 struct GNUNET_TIME_Relative ret;
1490 unsigned int rand_delay;
1491 unsigned int max_rand_delay;
1495 LOG (GNUNET_ERROR_TYPE_WARNING,
1496 "Not accepting spread of 0\n");
1500 GNUNET_assert (0 != mean.rel_value_us);
1502 /* Compute random time value between spread * mean and spread * mean */
1503 half_interval = GNUNET_TIME_relative_divide (mean, spread);
1505 max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us / mean.rel_value_us * (2/spread);
1507 * Compute random value between (0 and 1) * round_interval
1508 * via multiplying round_interval with a 'fraction' (0 to value)/value
1510 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, max_rand_delay);
1511 ret = GNUNET_TIME_relative_saturating_multiply (mean, rand_delay);
1512 ret = GNUNET_TIME_relative_divide (ret, max_rand_delay);
1513 ret = GNUNET_TIME_relative_add (ret, half_interval);
1515 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
1516 LOG (GNUNET_ERROR_TYPE_WARNING,
1517 "Returning FOREVER_REL\n");
1524 * Send single pull request
1526 * @param peer_id the peer to send the pull request to.
1529 send_pull_request (const struct GNUNET_PeerIdentity *peer)
1531 struct GNUNET_MQ_Envelope *ev;
1533 GNUNET_assert (GNUNET_NO == Peers_check_peer_flag (peer,
1534 Peers_PULL_REPLY_PENDING));
1535 Peers_set_peer_flag (peer, Peers_PULL_REPLY_PENDING);
1537 LOG (GNUNET_ERROR_TYPE_DEBUG,
1538 "Going to send PULL REQUEST to peer %s.\n",
1541 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1542 Peers_send_message (peer, ev, "PULL REQUEST");
1549 * @param peer_id the peer to send the push to.
1552 send_push (const struct GNUNET_PeerIdentity *peer_id)
1554 struct GNUNET_MQ_Envelope *ev;
1556 LOG (GNUNET_ERROR_TYPE_DEBUG,
1557 "Going to send PUSH to peer %s.\n",
1558 GNUNET_i2s (peer_id));
1560 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1561 Peers_send_message (peer_id, ev, "PUSH");
1566 do_round (void *cls);
1569 do_mal_round (void *cls);
1571 #ifdef ENABLE_MALICIOUS
1575 * @brief This function is called, when the client tells us to act malicious.
1576 * It verifies that @a msg is well-formed.
1578 * @param cls the closure (#ClientContext)
1579 * @param msg the message
1580 * @return #GNUNET_OK if @a msg is well-formed
1583 check_client_act_malicious (void *cls,
1584 const struct GNUNET_RPS_CS_ActMaliciousMessage *msg)
1586 struct ClientContext *cli_ctx = cls;
1587 uint16_t msize = ntohs (msg->header.size);
1588 uint32_t num_peers = ntohl (msg->num_peers);
1590 msize -= sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage);
1591 if ( (msize / sizeof (struct GNUNET_PeerIdentity) != num_peers) ||
1592 (msize % sizeof (struct GNUNET_PeerIdentity) != 0) )
1594 LOG (GNUNET_ERROR_TYPE_ERROR,
1595 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
1596 ntohl (msg->num_peers),
1597 (msize / sizeof (struct GNUNET_PeerIdentity)));
1599 GNUNET_SERVICE_client_drop (cli_ctx->client);
1600 return GNUNET_SYSERR;
1606 * Turn RPS service to act malicious.
1608 * @param cls Closure
1609 * @param client The client that sent the message
1610 * @param msg The message header
1613 handle_client_act_malicious (void *cls,
1614 const struct GNUNET_RPS_CS_ActMaliciousMessage *msg)
1616 struct ClientContext *cli_ctx = cls;
1617 struct GNUNET_PeerIdentity *peers;
1618 uint32_t num_mal_peers_sent;
1619 uint32_t num_mal_peers_old;
1621 /* Do actual logic */
1622 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1623 mal_type = ntohl (msg->type);
1624 if (NULL == mal_peer_set)
1625 mal_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1627 LOG (GNUNET_ERROR_TYPE_DEBUG,
1628 "Now acting malicious type %" PRIu32 ", got %" PRIu32 " peers.\n",
1630 ntohl (msg->num_peers));
1633 { /* Try to maximise representation */
1634 /* Add other malicious peers to those we already know */
1636 num_mal_peers_sent = ntohl (msg->num_peers);
1637 num_mal_peers_old = num_mal_peers;
1638 GNUNET_array_grow (mal_peers,
1640 num_mal_peers + num_mal_peers_sent);
1641 GNUNET_memcpy (&mal_peers[num_mal_peers_old],
1643 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1645 /* Add all mal peers to mal_peer_set */
1646 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1650 /* Substitute do_round () with do_mal_round () */
1651 GNUNET_SCHEDULER_cancel (do_round_task);
1652 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1655 else if ( (2 == mal_type) ||
1657 { /* Try to partition the network */
1658 /* Add other malicious peers to those we already know */
1660 num_mal_peers_sent = ntohl (msg->num_peers) - 1;
1661 num_mal_peers_old = num_mal_peers;
1662 GNUNET_array_grow (mal_peers,
1664 num_mal_peers + num_mal_peers_sent);
1665 if (NULL != mal_peers &&
1668 GNUNET_memcpy (&mal_peers[num_mal_peers_old],
1670 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1672 /* Add all mal peers to mal_peer_set */
1673 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1678 /* Store the one attacked peer */
1679 GNUNET_memcpy (&attacked_peer,
1680 &msg->attacked_peer,
1681 sizeof (struct GNUNET_PeerIdentity));
1682 /* Set the flag of the attacked peer to valid to avoid problems */
1683 if (GNUNET_NO == Peers_check_peer_known (&attacked_peer))
1685 (void) Peers_issue_peer_liveliness_check (&attacked_peer);
1688 LOG (GNUNET_ERROR_TYPE_DEBUG,
1689 "Attacked peer is %s\n",
1690 GNUNET_i2s (&attacked_peer));
1692 /* Substitute do_round () with do_mal_round () */
1693 GNUNET_SCHEDULER_cancel (do_round_task);
1694 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1696 else if (0 == mal_type)
1697 { /* Stop acting malicious */
1698 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
1700 /* Substitute do_mal_round () with do_round () */
1701 GNUNET_SCHEDULER_cancel (do_round_task);
1702 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1707 GNUNET_SERVICE_client_continue (cli_ctx->client);
1709 GNUNET_SERVICE_client_continue (cli_ctx->client);
1714 * Send out PUSHes and PULLs maliciously.
1716 * This is executed regylary.
1719 do_mal_round (void *cls)
1721 uint32_t num_pushes;
1723 struct GNUNET_TIME_Relative time_next_round;
1724 struct AttackedPeer *tmp_att_peer;
1726 LOG (GNUNET_ERROR_TYPE_DEBUG,
1727 "Going to execute next round maliciously type %" PRIu32 ".\n",
1729 do_round_task = NULL;
1730 GNUNET_assert (mal_type <= 3);
1731 /* Do malicious actions */
1733 { /* Try to maximise representation */
1735 /* The maximum of pushes we're going to send this round */
1736 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit,
1737 num_attacked_peers),
1738 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1740 LOG (GNUNET_ERROR_TYPE_DEBUG,
1741 "Going to send %" PRIu32 " pushes\n",
1744 /* Send PUSHes to attacked peers */
1745 for (i = 0 ; i < num_pushes ; i++)
1747 if (att_peers_tail == att_peer_index)
1748 att_peer_index = att_peers_head;
1750 att_peer_index = att_peer_index->next;
1752 send_push (&att_peer_index->peer_id);
1755 /* Send PULLs to some peers to learn about additional peers to attack */
1756 tmp_att_peer = att_peer_index;
1757 for (i = 0 ; i < num_pushes * alpha ; i++)
1759 if (att_peers_tail == tmp_att_peer)
1760 tmp_att_peer = att_peers_head;
1762 att_peer_index = tmp_att_peer->next;
1764 send_pull_request (&tmp_att_peer->peer_id);
1769 else if (2 == mal_type)
1771 * Try to partition the network
1772 * Send as many pushes to the attacked peer as possible
1773 * That is one push per round as it will ignore more.
1775 (void) Peers_issue_peer_liveliness_check (&attacked_peer);
1776 if (GNUNET_YES == Peers_check_peer_flag (&attacked_peer, Peers_ONLINE))
1777 send_push (&attacked_peer);
1782 { /* Combined attack */
1784 /* Send PUSH to attacked peers */
1785 if (GNUNET_YES == Peers_check_peer_known (&attacked_peer))
1787 (void) Peers_issue_peer_liveliness_check (&attacked_peer);
1788 if (GNUNET_YES == Peers_check_peer_flag (&attacked_peer, Peers_ONLINE))
1790 LOG (GNUNET_ERROR_TYPE_DEBUG,
1791 "Goding to send push to attacked peer (%s)\n",
1792 GNUNET_i2s (&attacked_peer));
1793 send_push (&attacked_peer);
1796 (void) Peers_issue_peer_liveliness_check (&attacked_peer);
1798 /* The maximum of pushes we're going to send this round */
1799 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit - 1,
1800 num_attacked_peers),
1801 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1803 LOG (GNUNET_ERROR_TYPE_DEBUG,
1804 "Going to send %" PRIu32 " pushes\n",
1807 for (i = 0; i < num_pushes; i++)
1809 if (att_peers_tail == att_peer_index)
1810 att_peer_index = att_peers_head;
1812 att_peer_index = att_peer_index->next;
1814 send_push (&att_peer_index->peer_id);
1817 /* Send PULLs to some peers to learn about additional peers to attack */
1818 tmp_att_peer = att_peer_index;
1819 for (i = 0; i < num_pushes * alpha; i++)
1821 if (att_peers_tail == tmp_att_peer)
1822 tmp_att_peer = att_peers_head;
1824 att_peer_index = tmp_att_peer->next;
1826 send_pull_request (&tmp_att_peer->peer_id);
1830 /* Schedule next round */
1831 time_next_round = compute_rand_delay (round_interval, 2);
1833 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round,
1835 GNUNET_assert (NULL == do_round_task);
1836 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
1837 &do_mal_round, NULL);
1838 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1840 #endif /* ENABLE_MALICIOUS */
1844 * Send out PUSHes and PULLs, possibly update #view, samplers.
1846 * This is executed regylary.
1849 do_round (void *cls)
1852 const struct GNUNET_PeerIdentity *view_array;
1853 unsigned int *permut;
1854 unsigned int a_peers; /* Number of peers we send pushes to */
1855 unsigned int b_peers; /* Number of peers we send pull requests to */
1856 uint32_t first_border;
1857 uint32_t second_border;
1858 struct GNUNET_PeerIdentity peer;
1859 struct GNUNET_PeerIdentity *update_peer;
1861 LOG (GNUNET_ERROR_TYPE_DEBUG,
1862 "Going to execute next round.\n");
1863 do_round_task = NULL;
1864 LOG (GNUNET_ERROR_TYPE_DEBUG,
1865 "Printing view:\n");
1866 to_file (file_name_view_log,
1867 "___ new round ___");
1868 view_array = View_get_as_array ();
1869 for (i = 0; i < View_size (); i++)
1871 LOG (GNUNET_ERROR_TYPE_DEBUG,
1872 "\t%s\n", GNUNET_i2s (&view_array[i]));
1873 to_file (file_name_view_log,
1875 GNUNET_i2s_full (&view_array[i]));
1879 /* Send pushes and pull requests */
1880 if (0 < View_size ())
1882 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1886 a_peers = ceil (alpha * View_size ());
1888 LOG (GNUNET_ERROR_TYPE_DEBUG,
1889 "Going to send pushes to %u (ceil (%f * %u)) peers.\n",
1890 a_peers, alpha, View_size ());
1891 for (i = 0; i < a_peers; i++)
1893 peer = view_array[permut[i]];
1894 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1895 { // FIXME if this fails schedule/loop this for later
1900 /* Send PULL requests */
1901 b_peers = ceil (beta * View_size ());
1902 first_border = a_peers;
1903 second_border = a_peers + b_peers;
1904 if (second_border > View_size ())
1906 first_border = View_size () - b_peers;
1907 second_border = View_size ();
1909 LOG (GNUNET_ERROR_TYPE_DEBUG,
1910 "Going to send pulls to %u (ceil (%f * %u)) peers.\n",
1911 b_peers, beta, View_size ());
1912 for (i = first_border; i < second_border; i++)
1914 peer = view_array[permut[i]];
1915 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer) &&
1916 GNUNET_NO == Peers_check_peer_flag (&peer, Peers_PULL_REPLY_PENDING)) // TODO
1917 { // FIXME if this fails schedule/loop this for later
1918 send_pull_request (&peer);
1922 GNUNET_free (permut);
1928 /* TODO see how many peers are in push-/pull- list! */
1930 if ((CustomPeerMap_size (push_map) <= alpha * View_size ()) &&
1931 (0 < CustomPeerMap_size (push_map)) &&
1932 (0 < CustomPeerMap_size (pull_map)))
1933 { /* If conditions for update are fulfilled, update */
1934 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the view.\n");
1936 uint32_t final_size;
1937 uint32_t peers_to_clean_size;
1938 struct GNUNET_PeerIdentity *peers_to_clean;
1940 peers_to_clean = NULL;
1941 peers_to_clean_size = 0;
1942 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, View_size ());
1943 GNUNET_memcpy (peers_to_clean,
1945 View_size () * sizeof (struct GNUNET_PeerIdentity));
1947 /* Seems like recreating is the easiest way of emptying the peermap */
1949 to_file (file_name_view_log,
1952 first_border = GNUNET_MIN (ceil (alpha * sampler_size_est_need),
1953 CustomPeerMap_size (push_map));
1954 second_border = first_border +
1955 GNUNET_MIN (floor (beta * sampler_size_est_need),
1956 CustomPeerMap_size (pull_map));
1957 final_size = second_border +
1958 ceil ((1 - (alpha + beta)) * sampler_size_est_need);
1960 /* Update view with peers received through PUSHes */
1961 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1962 CustomPeerMap_size (push_map));
1963 for (i = 0; i < first_border; i++)
1965 (void) insert_in_view (CustomPeerMap_get_peer_by_index (push_map,
1967 to_file (file_name_view_log,
1969 GNUNET_i2s_full (&view_array[i]));
1970 // TODO change the peer_flags accordingly
1972 GNUNET_free (permut);
1975 /* Update view with peers received through PULLs */
1976 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1977 CustomPeerMap_size (pull_map));
1978 for (i = first_border; i < second_border; i++)
1980 (void) insert_in_view (CustomPeerMap_get_peer_by_index (pull_map,
1981 permut[i - first_border]));
1982 to_file (file_name_view_log,
1984 GNUNET_i2s_full (&view_array[i]));
1985 // TODO change the peer_flags accordingly
1987 GNUNET_free (permut);
1990 /* Update view with peers from history */
1991 RPS_sampler_get_n_rand_peers (prot_sampler,
1994 final_size - second_border);
1995 // TODO change the peer_flags accordingly
1997 for (i = 0; i < View_size (); i++)
1998 rem_from_list (&peers_to_clean, &peers_to_clean_size, &view_array[i]);
2000 /* Clean peers that were removed from the view */
2001 for (i = 0; i < peers_to_clean_size; i++)
2003 to_file (file_name_view_log,
2005 GNUNET_i2s_full (&peers_to_clean[i]));
2006 clean_peer (&peers_to_clean[i]);
2007 //peer_destroy_channel_send (sender);
2010 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, 0);
2014 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the view.\n");
2016 // TODO independent of that also get some peers from CADET_get_peers()?
2018 LOG (GNUNET_ERROR_TYPE_DEBUG,
2019 "Received %u pushes and %u pulls last round (alpha (%.2f) * view_size (%u) = %.2f)\n",
2020 CustomPeerMap_size (push_map),
2021 CustomPeerMap_size (pull_map),
2024 alpha * View_size ());
2026 /* Update samplers */
2027 for (i = 0; i < CustomPeerMap_size (push_map); i++)
2029 update_peer = CustomPeerMap_get_peer_by_index (push_map, i);
2030 LOG (GNUNET_ERROR_TYPE_DEBUG,
2031 "Updating with peer %s from push list\n",
2032 GNUNET_i2s (update_peer));
2033 insert_in_sampler (NULL, update_peer);
2034 clean_peer (update_peer); /* This cleans only if it is not in the view */
2035 //peer_destroy_channel_send (sender);
2038 for (i = 0; i < CustomPeerMap_size (pull_map); i++)
2040 LOG (GNUNET_ERROR_TYPE_DEBUG,
2041 "Updating with peer %s from pull list\n",
2042 GNUNET_i2s (CustomPeerMap_get_peer_by_index (pull_map, i)));
2043 insert_in_sampler (NULL, CustomPeerMap_get_peer_by_index (pull_map, i));
2044 /* This cleans only if it is not in the view */
2045 clean_peer (CustomPeerMap_get_peer_by_index (pull_map, i));
2046 //peer_destroy_channel_send (sender);
2050 /* Empty push/pull lists */
2051 CustomPeerMap_clear (push_map);
2052 CustomPeerMap_clear (pull_map);
2054 struct GNUNET_TIME_Relative time_next_round;
2056 time_next_round = compute_rand_delay (round_interval, 2);
2058 /* Schedule next round */
2059 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
2061 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
2066 * This is called from GNUNET_CADET_get_peers().
2068 * It is called on every peer(ID) that cadet somehow has contact with.
2069 * We use those to initialise the sampler.
2072 init_peer_cb (void *cls,
2073 const struct GNUNET_PeerIdentity *peer,
2074 int tunnel, // "Do we have a tunnel towards this peer?"
2075 unsigned int n_paths, // "Number of known paths towards this peer"
2076 unsigned int best_path) // "How long is the best path?
2077 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
2081 LOG (GNUNET_ERROR_TYPE_DEBUG,
2082 "Got peer_id %s from cadet\n",
2089 * @brief Iterator function over stored, valid peers.
2091 * We initialise the sampler with those.
2093 * @param cls the closure
2094 * @param peer the peer id
2095 * @return #GNUNET_YES if we should continue to
2097 * #GNUNET_NO if not.
2100 valid_peers_iterator (void *cls,
2101 const struct GNUNET_PeerIdentity *peer)
2105 LOG (GNUNET_ERROR_TYPE_DEBUG,
2106 "Got stored, valid peer %s\n",
2115 * Iterator over peers from peerinfo.
2117 * @param cls closure
2118 * @param peer id of the peer, NULL for last call
2119 * @param hello hello message for the peer (can be NULL)
2120 * @param error message
2123 process_peerinfo_peers (void *cls,
2124 const struct GNUNET_PeerIdentity *peer,
2125 const struct GNUNET_HELLO_Message *hello,
2126 const char *err_msg)
2130 LOG (GNUNET_ERROR_TYPE_DEBUG,
2131 "Got peer_id %s from peerinfo\n",
2139 * Task run during shutdown.
2144 shutdown_task (void *cls)
2146 struct ClientContext *client_ctx;
2147 struct ReplyCls *reply_cls;
2149 LOG (GNUNET_ERROR_TYPE_DEBUG,
2150 "RPS is going down\n");
2152 /* Clean all clients */
2153 for (client_ctx = cli_ctx_head;
2154 NULL != cli_ctx_head;
2155 client_ctx = cli_ctx_head)
2157 /* Clean pending requests to the sampler */
2158 for (reply_cls = client_ctx->rep_cls_head;
2159 NULL != client_ctx->rep_cls_head;
2160 reply_cls = client_ctx->rep_cls_head)
2162 RPS_sampler_request_cancel (reply_cls->req_handle);
2163 GNUNET_CONTAINER_DLL_remove (client_ctx->rep_cls_head,
2164 client_ctx->rep_cls_tail,
2166 GNUNET_free (reply_cls);
2168 GNUNET_MQ_destroy (client_ctx->mq);
2169 GNUNET_CONTAINER_DLL_remove (cli_ctx_head, cli_ctx_tail, client_ctx);
2170 GNUNET_free (client_ctx);
2172 GNUNET_PEERINFO_notify_cancel (peerinfo_notify_handle);
2173 GNUNET_PEERINFO_disconnect (peerinfo_handle);
2175 if (NULL != do_round_task)
2177 GNUNET_SCHEDULER_cancel (do_round_task);
2178 do_round_task = NULL;
2183 GNUNET_NSE_disconnect (nse);
2184 RPS_sampler_destroy (prot_sampler);
2185 RPS_sampler_destroy (client_sampler);
2186 GNUNET_CADET_disconnect (cadet_handle);
2188 CustomPeerMap_destroy (push_map);
2189 CustomPeerMap_destroy (pull_map);
2190 #ifdef ENABLE_MALICIOUS
2191 struct AttackedPeer *tmp_att_peer;
2192 GNUNET_free (file_name_view_log);
2193 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
2194 if (NULL != mal_peer_set)
2195 GNUNET_CONTAINER_multipeermap_destroy (mal_peer_set);
2196 if (NULL != att_peer_set)
2197 GNUNET_CONTAINER_multipeermap_destroy (att_peer_set);
2198 while (NULL != att_peers_head)
2200 tmp_att_peer = att_peers_head;
2201 GNUNET_CONTAINER_DLL_remove (att_peers_head, att_peers_tail, tmp_att_peer);
2203 #endif /* ENABLE_MALICIOUS */
2208 * Handle client connecting to the service.
2211 * @param client the new client
2212 * @param mq the message queue of @a client
2216 client_connect_cb (void *cls,
2217 struct GNUNET_SERVICE_Client *client,
2218 struct GNUNET_MQ_Handle *mq)
2220 struct ClientContext *cli_ctx;
2222 LOG (GNUNET_ERROR_TYPE_DEBUG,
2223 "Client connected\n");
2225 return client; /* Server was destroyed before a client connected. Shutting down */
2226 cli_ctx = GNUNET_new (struct ClientContext);
2227 cli_ctx->mq = GNUNET_SERVICE_client_get_mq (client);
2228 cli_ctx->client = client;
2229 GNUNET_CONTAINER_DLL_insert (cli_ctx_head,
2236 * Callback called when a client disconnected from the service
2238 * @param cls closure for the service
2239 * @param c the client that disconnected
2240 * @param internal_cls should be equal to @a c
2243 client_disconnect_cb (void *cls,
2244 struct GNUNET_SERVICE_Client *client,
2247 struct ClientContext *cli_ctx = internal_cls;
2249 GNUNET_assert (client == cli_ctx->client);
2251 {/* shutdown task - destroy all clients */
2252 while (NULL != cli_ctx_head)
2253 destroy_cli_ctx (cli_ctx_head);
2256 { /* destroy this client */
2257 LOG (GNUNET_ERROR_TYPE_DEBUG,
2258 "Client disconnected. Destroy its context.\n");
2259 destroy_cli_ctx (cli_ctx);
2265 * Handle random peer sampling clients.
2267 * @param cls closure
2268 * @param c configuration to use
2269 * @param service the initialized service
2273 const struct GNUNET_CONFIGURATION_Handle *c,
2274 struct GNUNET_SERVICE_Handle *service)
2276 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2277 {&handle_peer_check , GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE,
2278 sizeof (struct GNUNET_MessageHeader)},
2279 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH,
2280 sizeof (struct GNUNET_MessageHeader)},
2281 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2282 sizeof (struct GNUNET_MessageHeader)},
2283 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY, 0},
2289 char* fn_valid_peers;
2290 struct GNUNET_HashCode port;
2292 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2297 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2298 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2299 "STARTING SERVICE (rps) for peer [%s]\n",
2300 GNUNET_i2s (&own_identity));
2301 #ifdef ENABLE_MALICIOUS
2302 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2303 "Malicious execution compiled in.\n");
2304 #endif /* ENABLE_MALICIOUS */
2308 /* Get time interval from the configuration */
2309 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2313 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2314 "RPS", "ROUNDINTERVAL");
2315 GNUNET_SCHEDULER_shutdown ();
2319 /* Get initial size of sampler/view from the configuration */
2321 GNUNET_CONFIGURATION_get_value_number (cfg, "RPS", "INITSIZE",
2322 (long long unsigned int *) &sampler_size_est_need))
2324 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2326 GNUNET_SCHEDULER_shutdown ();
2329 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %u\n", sampler_size_est_need);
2332 GNUNET_CONFIGURATION_get_value_filename (cfg,
2334 "FILENAME_VALID_PEERS",
2337 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2338 "rps", "FILENAME_VALID_PEERS");
2344 /* file_name_view_log */
2345 if (GNUNET_OK != GNUNET_DISK_directory_create ("/tmp/rps/"))
2347 LOG (GNUNET_ERROR_TYPE_WARNING,
2348 "Failed to create directory /tmp/rps/\n");
2351 size = (14 + strlen (GNUNET_i2s_full (&own_identity)) + 1) * sizeof (char);
2352 file_name_view_log = GNUNET_malloc (size);
2353 out_size = GNUNET_snprintf (file_name_view_log,
2356 GNUNET_i2s_full (&own_identity));
2357 if (size < out_size ||
2360 LOG (GNUNET_ERROR_TYPE_WARNING,
2361 "Failed to write string to buffer (size: %i, out_size: %i)\n",
2367 /* connect to NSE */
2368 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2375 /* Initialise cadet */
2376 cadet_handle = GNUNET_CADET_connect (cfg,
2378 &cleanup_destroyed_channel,
2380 GNUNET_assert (NULL != cadet_handle);
2381 GNUNET_CRYPTO_hash (GNUNET_APPLICATION_PORT_RPS,
2382 strlen (GNUNET_APPLICATION_PORT_RPS),
2384 GNUNET_CADET_open_port (cadet_handle,
2386 &Peers_handle_inbound_channel, cls);
2389 peerinfo_handle = GNUNET_PEERINFO_connect (cfg);
2390 Peers_initialise (fn_valid_peers, cadet_handle, &own_identity);
2391 GNUNET_free (fn_valid_peers);
2393 /* Initialise sampler */
2394 struct GNUNET_TIME_Relative half_round_interval;
2395 struct GNUNET_TIME_Relative max_round_interval;
2397 half_round_interval = GNUNET_TIME_relative_divide (round_interval, 2);
2398 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2400 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2401 client_sampler = RPS_sampler_mod_init (sampler_size_est_need, max_round_interval);
2403 /* Initialise push and pull maps */
2404 push_map = CustomPeerMap_create (4);
2405 pull_map = CustomPeerMap_create (4);
2408 //LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2409 //GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2410 // TODO send push/pull to each of those peers?
2411 // TODO read stored valid peers from last run
2412 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting stored valid peers\n");
2413 Peers_get_valid_peers (valid_peers_iterator, NULL);
2415 peerinfo_notify_handle = GNUNET_PEERINFO_notify (cfg,
2417 process_peerinfo_peers,
2420 LOG (GNUNET_ERROR_TYPE_INFO, "Ready to receive requests from clients\n");
2422 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
2423 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
2425 GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
2430 * Define "main" method using service macro.
2434 GNUNET_SERVICE_OPTION_NONE,
2437 &client_disconnect_cb,
2439 GNUNET_MQ_hd_fixed_size (client_request,
2440 GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
2441 struct GNUNET_RPS_CS_RequestMessage,
2443 GNUNET_MQ_hd_fixed_size (client_request_cancel,
2444 GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST_CANCEL,
2445 struct GNUNET_RPS_CS_RequestCancelMessage,
2447 GNUNET_MQ_hd_var_size (client_seed,
2448 GNUNET_MESSAGE_TYPE_RPS_CS_SEED,
2449 struct GNUNET_RPS_CS_SeedMessage,
2451 #ifdef ENABLE_MALICIOUS
2452 GNUNET_MQ_hd_var_size (client_act_malicious,
2453 GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS,
2454 struct GNUNET_RPS_CS_ActMaliciousMessage,
2456 #endif /* ENABLE_MALICIOUS */
2457 GNUNET_MQ_handler_end());
2459 /* end of gnunet-service-rps.c */