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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 * Number of history update tasks.
258 static uint32_t num_hist_update_tasks;
261 #ifdef ENABLE_MALICIOUS
263 * Type of malicious peer
265 * 0 Don't act malicious at all - Default
266 * 1 Try to maximise representation
267 * 2 Try to partition the network
270 static uint32_t mal_type;
273 * Other malicious peers
275 static struct GNUNET_PeerIdentity *mal_peers;
278 * Hashmap of malicious peers used as set.
279 * Used to more efficiently check whether we know that peer.
281 static struct GNUNET_CONTAINER_MultiPeerMap *mal_peer_set;
284 * Number of other malicious peers
286 static uint32_t num_mal_peers;
290 * If type is 2 This struct is used to store the attacked peers in a DLL
297 struct AttackedPeer *next;
298 struct AttackedPeer *prev;
303 struct GNUNET_PeerIdentity peer_id;
307 * If type is 2 this is the DLL of attacked peers
309 static struct AttackedPeer *att_peers_head;
310 static struct AttackedPeer *att_peers_tail;
313 * This index is used to point to an attacked peer to
314 * implement the round-robin-ish way to select attacked peers.
316 static struct AttackedPeer *att_peer_index;
319 * Hashmap of attacked peers used as set.
320 * Used to more efficiently check whether we know that peer.
322 static struct GNUNET_CONTAINER_MultiPeerMap *att_peer_set;
325 * Number of attacked peers
327 static uint32_t num_attacked_peers;
330 * If type is 1 this is the attacked peer
332 static struct GNUNET_PeerIdentity attacked_peer;
335 * The limit of PUSHes we can send in one round.
336 * This is an assumption of the Brahms protocol and either implemented
339 * assumend to be the bandwidth limitation.
341 static uint32_t push_limit = 10000;
342 #endif /* ENABLE_MALICIOUS */
345 /***********************************************************************
347 ***********************************************************************/
350 /***********************************************************************
352 ***********************************************************************/
356 * Print peerlist to log.
359 print_peer_list (struct GNUNET_PeerIdentity *list,
364 LOG (GNUNET_ERROR_TYPE_DEBUG,
365 "Printing peer list of length %u at %p:\n",
368 for (i = 0 ; i < len ; i++)
370 LOG (GNUNET_ERROR_TYPE_DEBUG,
372 i, GNUNET_i2s (&list[i]));
378 * Remove peer from list.
381 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
382 unsigned int *list_size,
383 const struct GNUNET_PeerIdentity *peer)
386 struct GNUNET_PeerIdentity *tmp;
390 LOG (GNUNET_ERROR_TYPE_DEBUG,
391 "Removing peer %s from list at %p\n",
395 for ( i = 0 ; i < *list_size ; i++ )
397 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
399 if (i < *list_size -1)
400 { /* Not at the last entry -- shift peers left */
401 memcpy (&tmp[i], &tmp[i +1],
402 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
404 /* Remove last entry (should be now useless PeerID) */
405 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
413 * Sum all time relatives of an array.
415 static struct GNUNET_TIME_Relative
416 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array,
419 struct GNUNET_TIME_Relative sum;
422 sum = GNUNET_TIME_UNIT_ZERO;
423 for ( i = 0 ; i < arr_size ; i++ )
425 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
432 * Compute the average of given time relatives.
434 static struct GNUNET_TIME_Relative
435 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array,
438 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array,
445 * Put random peer from sampler into the view as history update.
448 hist_update (void *cls,
449 struct GNUNET_PeerIdentity *ids,
454 for (i = 0; i < num_peers; i++)
457 to_file (file_name_view_log,
459 GNUNET_i2s_full (ids));
461 if (0 < num_hist_update_tasks)
462 num_hist_update_tasks--;
467 * Wrapper around #RPS_sampler_resize()
469 * If we do not have enough sampler elements, double current sampler size
470 * If we have more than enough sampler elements, halv current sampler size
473 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
475 unsigned int sampler_size;
478 // TODO respect the min, max
479 sampler_size = RPS_sampler_get_size (sampler);
480 if (sampler_size > new_size * 4)
482 RPS_sampler_resize (sampler, sampler_size / 2);
484 else if (sampler_size < new_size)
486 RPS_sampler_resize (sampler, sampler_size * 2);
488 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
493 * Wrapper around #RPS_sampler_resize() resizing the client sampler
496 client_resize_wrapper ()
498 uint32_t bigger_size;
502 bigger_size = GNUNET_MAX (sampler_size_est_need, sampler_size_client_need);
504 // TODO respect the min, max
505 resize_wrapper (client_sampler, bigger_size);
506 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size_client is now %" PRIu32 "\n",
512 * Estimate request rate
514 * Called every time we receive a request from the client.
519 struct GNUNET_TIME_Relative max_round_duration;
521 if (request_deltas_size > req_counter)
523 if ( 1 < req_counter)
525 /* Shift last request deltas to the right */
526 memcpy (&request_deltas[1],
528 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
530 /* Add current delta to beginning */
532 GNUNET_TIME_absolute_get_difference (last_request,
533 GNUNET_TIME_absolute_get ());
534 request_rate = T_relative_avg (request_deltas, req_counter);
535 request_rate = (request_rate.rel_value_us < 1) ?
536 GNUNET_TIME_relative_get_unit_ () : request_rate;
538 /* Compute the duration a round will maximally take */
540 GNUNET_TIME_relative_add (round_interval,
541 GNUNET_TIME_relative_divide (round_interval, 2));
543 /* Set the estimated size the sampler has to have to
544 * satisfy the current client request rate */
545 sampler_size_client_need =
546 max_round_duration.rel_value_us / request_rate.rel_value_us;
548 /* Resize the sampler */
549 client_resize_wrapper ();
551 last_request = GNUNET_TIME_absolute_get ();
556 * Add all peers in @a peer_array to @a peer_map used as set.
558 * @param peer_array array containing the peers
559 * @param num_peers number of peers in @peer_array
560 * @param peer_map the peermap to use as set
563 add_peer_array_to_set (const struct GNUNET_PeerIdentity *peer_array,
564 unsigned int num_peers,
565 struct GNUNET_CONTAINER_MultiPeerMap *peer_map)
568 if (NULL == peer_map)
570 LOG (GNUNET_ERROR_TYPE_WARNING,
571 "Trying to add peers to non-existing peermap.\n");
575 for (i = 0; i < num_peers; i++)
577 GNUNET_CONTAINER_multipeermap_put (peer_map,
580 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
586 * Send a PULL REPLY to @a peer_id
588 * @param peer_id the peer to send the reply to.
589 * @param peer_ids the peers to send to @a peer_id
590 * @param num_peer_ids the number of peers to send to @a peer_id
593 send_pull_reply (const struct GNUNET_PeerIdentity *peer_id,
594 const struct GNUNET_PeerIdentity *peer_ids,
595 unsigned int num_peer_ids)
598 struct GNUNET_MQ_Envelope *ev;
599 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
601 /* Compute actual size */
602 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
603 num_peer_ids * sizeof (struct GNUNET_PeerIdentity);
605 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
606 /* Compute number of peers to send
607 * If too long, simply truncate */
608 // TODO select random ones via permutation
609 // or even better: do good protocol design
611 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
612 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
613 sizeof (struct GNUNET_PeerIdentity);
615 send_size = num_peer_ids;
617 LOG (GNUNET_ERROR_TYPE_DEBUG,
618 "Going to send PULL REPLY with %u peers to %s\n",
619 send_size, GNUNET_i2s (peer_id));
621 ev = GNUNET_MQ_msg_extra (out_msg,
622 send_size * sizeof (struct GNUNET_PeerIdentity),
623 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
624 out_msg->num_peers = htonl (send_size);
625 memcpy (&out_msg[1], peer_ids,
626 send_size * sizeof (struct GNUNET_PeerIdentity));
628 Peers_send_message (peer_id, ev, "PULL REPLY");
633 * Insert PeerID in #pull_map
635 * Called once we know a peer is live.
638 insert_in_pull_map (void *cls,
639 const struct GNUNET_PeerIdentity *peer)
641 CustomPeerMap_put (pull_map, peer);
646 * Insert PeerID in #view
648 * Called once we know a peer is live.
652 insert_in_view (void *cls,
653 const struct GNUNET_PeerIdentity *peer)
655 GNUNET_assert (GNUNET_YES == Peers_check_peer_flag (peer, Peers_ONLINE));
661 * Update sampler with given PeerID.
665 insert_in_sampler (void *cls,
666 const struct GNUNET_PeerIdentity *peer)
668 LOG (GNUNET_ERROR_TYPE_DEBUG,
669 "Updating samplers with peer %s from insert_in_sampler()\n",
671 RPS_sampler_update (prot_sampler, peer);
672 RPS_sampler_update (client_sampler, peer);
673 if (0 < RPS_sampler_count_id (prot_sampler, peer))
675 /* Make sure we 'know' about this peer */
676 (void) Peers_insert_peer_check_liveliness (peer);
677 /* Establish a channel towards that peer to indicate we are going to send
679 Peers_indicate_sending_intention (peer);
680 //Peers_issue_peer_liveliness_check (peer);
685 * @brief If @a peer was unknown, check liveliness and insert it in view and
688 * @param peer peer to insert
691 got_peer (const struct GNUNET_PeerIdentity *peer)
693 /* If we did not know this peer already, insert it into sampler and view */
694 if (GNUNET_YES == Peers_insert_peer_check_liveliness (peer))
696 Peers_schedule_operation (peer, insert_in_sampler);
697 Peers_schedule_operation (peer, insert_in_view);
703 * @brief Checks if there is a sending channel and if it is needed
705 * @param peer the peer whose sending channel is checked
706 * @return GNUNET_YES if sending channel exists and is still needed
707 * GNUNET_NO otherwise
710 check_sending_channel_needed (const struct GNUNET_PeerIdentity *peer)
712 /* struct GNUNET_CADET_Channel *channel; */
713 if (GNUNET_NO == Peers_check_peer_known (peer))
717 if (GNUNET_YES == Peers_check_sending_channel_exists (peer))
719 if ( (0 < RPS_sampler_count_id (prot_sampler, peer)) ||
720 (GNUNET_YES == View_contains_peer (peer)) ||
721 (GNUNET_YES == CustomPeerMap_contains_peer (push_map, peer)) ||
722 (GNUNET_YES == CustomPeerMap_contains_peer (pull_map, peer)) ||
723 (GNUNET_YES == Peers_check_peer_flag (peer, Peers_PULL_REPLY_PENDING)))
724 { /* If we want to keep the connection to peer open */
733 * @brief remove peer from our knowledge, the view, push and pull maps and
736 * @param peer the peer to remove
739 remove_peer (const struct GNUNET_PeerIdentity *peer)
741 View_remove_peer (peer);
742 CustomPeerMap_remove_peer (pull_map, peer);
743 CustomPeerMap_remove_peer (push_map, peer);
744 RPS_sampler_reinitialise_by_value (prot_sampler, peer);
745 RPS_sampler_reinitialise_by_value (client_sampler, peer);
746 Peers_remove_peer (peer);
751 * @brief Remove data that is not needed anymore.
753 * If the sending channel is no longer needed it is destroyed.
755 * @param peer the peer whose data is about to be cleaned
758 clean_peer (const struct GNUNET_PeerIdentity *peer)
760 if (GNUNET_NO == check_sending_channel_needed (peer))
762 #ifdef ENABLE_MALICIOUS
763 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
764 Peers_destroy_sending_channel (peer);
765 #else /* ENABLE_MALICIOUS */
766 Peers_destroy_sending_channel (peer);
767 #endif /* ENABLE_MALICIOUS */
770 if ( (GNUNET_NO == Peers_check_peer_send_intention (peer)) &&
771 (GNUNET_NO == View_contains_peer (peer)) &&
772 (GNUNET_NO == CustomPeerMap_contains_peer (push_map, peer)) &&
773 (GNUNET_NO == CustomPeerMap_contains_peer (push_map, peer)) &&
774 (0 == RPS_sampler_count_id (prot_sampler, peer)) &&
775 (0 == RPS_sampler_count_id (client_sampler, peer)) )
776 { /* We can safely remov this peer */
780 Peers_clean_peer (peer);
784 * @brief This is called when a channel is destroyed.
786 * Removes peer completely from our knowledge if the send_channel was destroyed
787 * Otherwise simply delete the recv_channel
789 * @param cls The closure
790 * @param channel The channel being closed
791 * @param channel_ctx The context associated with this channel
794 cleanup_destroyed_channel (void *cls,
795 const struct GNUNET_CADET_Channel *channel,
798 struct GNUNET_PeerIdentity *peer;
800 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
801 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
802 // FIXME wait for cadet to change this function
804 if (GNUNET_NO == Peers_check_peer_known (peer))
805 { /* We don't know a context to that peer */
806 LOG (GNUNET_ERROR_TYPE_WARNING,
807 "channel (%s) without associated context was destroyed\n",
812 if (GNUNET_YES == Peers_check_peer_flag (peer, Peers_TO_DESTROY))
813 { /* We are in the middle of removing that peer from our knowledge. In this
814 case simply make sure that the channels are cleaned. */
815 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
816 to_file (file_name_view_log,
817 "-%s\t(cleanup channel, ourself)",
818 GNUNET_i2s_full (peer));
823 Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_SENDING))
824 { /* Channel used for sending was destroyed */
825 /* Possible causes of channel destruction:
826 * - ourselves -> cleaning send channel -> clean context
827 * - other peer -> peer probably went down -> remove
829 if (GNUNET_YES == Peers_check_channel_flag (channel_ctx, Peers_CHANNEL_CLEAN))
830 { /* We are about to clean the sending channel. Clean the respective
832 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
836 { /* Other peer destroyed our sending channel that he is supposed to keep
837 * open. It probably went down. Remove it from our knowledge. */
838 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
843 else if (GNUNET_YES ==
844 Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_RECEIVING))
845 { /* Channel used for receiving was destroyed */
846 /* Possible causes of channel destruction:
847 * - ourselves -> peer tried to establish channel twice -> clean context
848 * - other peer -> peer doesn't want to send us data -> clean
851 Peers_check_channel_flag (channel_ctx, Peers_CHANNEL_ESTABLISHED_TWICE))
852 { /* Other peer tried to establish a channel to us twice. We do not accept
853 * that. Clean the context. */
854 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
858 { /* Other peer doesn't want to send us data anymore. We are free to clean
860 Peers_cleanup_destroyed_channel (cls, channel, channel_ctx);
867 LOG (GNUNET_ERROR_TYPE_WARNING,
868 "Destroyed channel is neither sending nor receiving channel\n");
872 /***********************************************************************
874 ***********************************************************************/
877 destroy_reply_cls (struct ReplyCls *rep_cls)
879 struct ClientContext *cli_ctx;
881 cli_ctx = GNUNET_SERVER_client_get_user_context (rep_cls->client,
882 struct ClientContext);
883 GNUNET_assert (NULL != cli_ctx);
884 GNUNET_CONTAINER_DLL_remove (cli_ctx->rep_cls_head,
885 cli_ctx->rep_cls_tail,
887 GNUNET_free (rep_cls);
892 destroy_cli_ctx (struct ClientContext *cli_ctx)
894 GNUNET_assert (NULL != cli_ctx);
895 if (NULL != cli_ctx->mq)
897 GNUNET_MQ_destroy (cli_ctx->mq);
899 if (NULL != cli_ctx->rep_cls_head)
901 LOG (GNUNET_ERROR_TYPE_WARNING,
902 "Trying to destroy the context of a client that still has pending requests. Going to clean those\n");
903 while (NULL != cli_ctx->rep_cls_head)
904 destroy_reply_cls (cli_ctx->rep_cls_head);
906 GNUNET_CONTAINER_DLL_remove (cli_ctx_head,
909 GNUNET_free (cli_ctx);
914 * Function called by NSE.
916 * Updates sizes of sampler list and view and adapt those lists
920 nse_callback (void *cls,
921 struct GNUNET_TIME_Absolute timestamp,
922 double logestimate, double std_dev)
925 //double scale; // TODO this might go gloabal/config
927 LOG (GNUNET_ERROR_TYPE_DEBUG,
928 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
929 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
931 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
932 // GNUNET_NSE_log_estimate_to_n (logestimate);
933 estimate = pow (estimate, 1.0 / 3);
934 // TODO add if std_dev is a number
935 // estimate += (std_dev * scale);
936 if (2 < ceil (estimate))
938 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
939 sampler_size_est_need = estimate;
941 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
943 /* If the NSE has changed adapt the lists accordingly */
944 resize_wrapper (prot_sampler, sampler_size_est_need);
945 client_resize_wrapper ();
950 * Callback called once the requested PeerIDs are ready.
952 * Sends those to the requesting client.
955 client_respond (void *cls,
956 struct GNUNET_PeerIdentity *peer_ids,
960 struct GNUNET_MQ_Envelope *ev;
961 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
962 struct ReplyCls *reply_cls = (struct ReplyCls *) cls;
963 uint32_t size_needed;
964 struct ClientContext *cli_ctx;
966 GNUNET_assert (NULL != reply_cls);
967 LOG (GNUNET_ERROR_TYPE_DEBUG,
968 "sampler returned %" PRIu32 " peers:\n",
970 for (i = 0; i < num_peers; i++)
972 LOG (GNUNET_ERROR_TYPE_DEBUG,
973 " %" PRIu32 ": %s\n",
975 GNUNET_i2s (&peer_ids[i]));
978 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
979 num_peers * sizeof (struct GNUNET_PeerIdentity);
981 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
983 ev = GNUNET_MQ_msg_extra (out_msg,
984 num_peers * sizeof (struct GNUNET_PeerIdentity),
985 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
986 out_msg->num_peers = htonl (num_peers);
987 out_msg->id = htonl (reply_cls->id);
991 num_peers * sizeof (struct GNUNET_PeerIdentity));
992 GNUNET_free (peer_ids);
994 cli_ctx = GNUNET_SERVER_client_get_user_context (reply_cls->client,
995 struct ClientContext);
996 GNUNET_assert (NULL != cli_ctx);
997 destroy_reply_cls (reply_cls);
998 GNUNET_MQ_send (cli_ctx->mq, ev);
1003 * Handle RPS request from the client.
1005 * @param cls closure
1006 * @param client identification of the client
1007 * @param message the actual message
1010 handle_client_request (void *cls,
1011 struct GNUNET_SERVER_Client *client,
1012 const struct GNUNET_MessageHeader *message)
1014 struct GNUNET_RPS_CS_RequestMessage *msg;
1016 uint32_t size_needed;
1017 struct ReplyCls *reply_cls;
1019 struct ClientContext *cli_ctx;
1021 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1023 num_peers = ntohl (msg->num_peers);
1024 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1025 num_peers * sizeof (struct GNUNET_PeerIdentity);
1027 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1029 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1030 "Message received from client has size larger than expected\n");
1031 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1035 for (i = 0 ; i < num_peers ; i++)
1038 LOG (GNUNET_ERROR_TYPE_DEBUG,
1039 "Client requested %" PRIu32 " random peer(s).\n",
1042 reply_cls = GNUNET_new (struct ReplyCls);
1043 reply_cls->id = ntohl (msg->id);
1044 reply_cls->client = client;
1045 reply_cls->req_handle = RPS_sampler_get_n_rand_peers (client_sampler,
1050 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
1051 GNUNET_assert (NULL != cli_ctx);
1052 GNUNET_CONTAINER_DLL_insert (cli_ctx->rep_cls_head,
1053 cli_ctx->rep_cls_tail,
1055 GNUNET_SERVER_receive_done (client,
1061 * @brief Handle a message that requests the cancellation of a request
1064 * @param client the client that requests the cancellation
1065 * @param message the message containing the id of the request
1068 handle_client_request_cancel (void *cls,
1069 struct GNUNET_SERVER_Client *client,
1070 const struct GNUNET_MessageHeader *message)
1072 struct GNUNET_RPS_CS_RequestCancelMessage *msg =
1073 (struct GNUNET_RPS_CS_RequestCancelMessage *) message;
1074 struct ClientContext *cli_ctx;
1075 struct ReplyCls *rep_cls;
1077 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
1078 GNUNET_assert (NULL != cli_ctx->rep_cls_head);
1079 rep_cls = cli_ctx->rep_cls_head;
1080 LOG (GNUNET_ERROR_TYPE_DEBUG,
1081 "Client cancels request with id %" PRIu32 "\n",
1083 while ( (NULL != rep_cls->next) &&
1084 (rep_cls->id != ntohl (msg->id)) )
1085 rep_cls = rep_cls->next;
1086 GNUNET_assert (rep_cls->id == ntohl (msg->id));
1087 RPS_sampler_request_cancel (rep_cls->req_handle);
1088 destroy_reply_cls (rep_cls);
1089 GNUNET_SERVER_receive_done (client,
1095 * Handle seed from the client.
1097 * @param cls closure
1098 * @param client identification of the client
1099 * @param message the actual message
1102 handle_client_seed (void *cls,
1103 struct GNUNET_SERVER_Client *client,
1104 const struct GNUNET_MessageHeader *message)
1106 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1107 struct GNUNET_PeerIdentity *peers;
1111 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1113 GNUNET_break_op (0);
1114 GNUNET_SERVER_receive_done (client,
1118 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1119 num_peers = ntohl (in_msg->num_peers);
1120 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1121 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1122 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1124 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1125 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1127 GNUNET_break_op (0);
1128 GNUNET_SERVER_receive_done (client,
1133 LOG (GNUNET_ERROR_TYPE_DEBUG,
1134 "Client seeded peers:\n");
1135 print_peer_list (peers, num_peers);
1137 for (i = 0; i < num_peers; i++)
1139 LOG (GNUNET_ERROR_TYPE_DEBUG,
1140 "Updating samplers with seed %" PRIu32 ": %s\n",
1142 GNUNET_i2s (&peers[i]));
1144 got_peer (&peers[i]);
1146 //RPS_sampler_update (prot_sampler, &peers[i]);
1147 //RPS_sampler_update (client_sampler, &peers[i]);
1150 ////GNUNET_free (peers);
1152 GNUNET_SERVER_receive_done (client,
1158 * Handle a PUSH message from another peer.
1160 * Check the proof of work and store the PeerID
1161 * in the temporary list for pushed PeerIDs.
1163 * @param cls Closure
1164 * @param channel The channel the PUSH was received over
1165 * @param channel_ctx The context associated with this channel
1166 * @param msg The message header
1169 handle_peer_push (void *cls,
1170 struct GNUNET_CADET_Channel *channel,
1172 const struct GNUNET_MessageHeader *msg)
1174 const struct GNUNET_PeerIdentity *peer;
1176 // (check the proof of work (?))
1178 peer = (const struct GNUNET_PeerIdentity *)
1179 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1180 // FIXME wait for cadet to change this function
1182 LOG (GNUNET_ERROR_TYPE_DEBUG,
1183 "Received PUSH (%s)\n",
1186 #ifdef ENABLE_MALICIOUS
1187 struct AttackedPeer *tmp_att_peer;
1189 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1190 memcpy (&tmp_att_peer->peer_id, peer, sizeof (struct GNUNET_PeerIdentity));
1193 { /* Try to maximise representation */
1194 if (NULL == att_peer_set)
1195 att_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1196 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1199 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1202 add_peer_array_to_set (peer, 1, att_peer_set);
1208 else if (2 == mal_type)
1209 { /* We attack one single well-known peer - simply ignore */
1214 GNUNET_free (tmp_att_peer);
1217 #endif /* ENABLE_MALICIOUS */
1219 /* Add the sending peer to the push_map */
1220 CustomPeerMap_put (push_map, peer);
1222 GNUNET_CADET_receive_done (channel);
1228 * Handle PULL REQUEST request message from another peer.
1230 * Reply with the view of PeerIDs.
1232 * @param cls Closure
1233 * @param channel The channel the PULL REQUEST was received over
1234 * @param channel_ctx The context associated with this channel
1235 * @param msg The message header
1238 handle_peer_pull_request (void *cls,
1239 struct GNUNET_CADET_Channel *channel,
1241 const struct GNUNET_MessageHeader *msg)
1243 struct GNUNET_PeerIdentity *peer;
1244 const struct GNUNET_PeerIdentity *view_array;
1246 peer = (struct GNUNET_PeerIdentity *)
1247 GNUNET_CADET_channel_get_info (channel,
1248 GNUNET_CADET_OPTION_PEER);
1249 // FIXME wait for cadet to change this function
1251 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REQUEST (%s)\n", GNUNET_i2s (peer));
1253 #ifdef ENABLE_MALICIOUS
1256 { /* Try to maximise representation */
1257 send_pull_reply (peer, mal_peers, num_mal_peers);
1261 else if (2 == mal_type)
1262 { /* Try to partition network */
1263 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
1265 send_pull_reply (peer, mal_peers, num_mal_peers);
1269 #endif /* ENABLE_MALICIOUS */
1271 view_array = View_get_as_array ();
1273 send_pull_reply (peer, view_array, View_size ());
1275 GNUNET_CADET_receive_done (channel);
1281 * Handle PULL REPLY message from another peer.
1283 * Check whether we sent a corresponding request and
1284 * whether this reply is the first one.
1286 * @param cls Closure
1287 * @param channel The channel the PUSH was received over
1288 * @param channel_ctx The context associated with this channel
1289 * @param msg The message header
1292 handle_peer_pull_reply (void *cls,
1293 struct GNUNET_CADET_Channel *channel,
1295 const struct GNUNET_MessageHeader *msg)
1297 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1298 struct GNUNET_PeerIdentity *peers;
1299 struct GNUNET_PeerIdentity *sender;
1301 #ifdef ENABLE_MALICIOUS
1302 struct AttackedPeer *tmp_att_peer;
1303 #endif /* ENABLE_MALICIOUS */
1305 /* Check for protocol violation */
1306 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1308 GNUNET_break_op (0);
1309 GNUNET_CADET_receive_done (channel);
1310 return GNUNET_SYSERR;
1313 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1314 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1315 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1317 LOG (GNUNET_ERROR_TYPE_ERROR,
1318 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
1319 ntohl (in_msg->num_peers),
1320 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1321 sizeof (struct GNUNET_PeerIdentity));
1322 GNUNET_break_op (0);
1323 GNUNET_CADET_receive_done (channel);
1324 return GNUNET_SYSERR;
1327 // Guess simply casting isn't the nicest way...
1328 // FIXME wait for cadet to change this function
1329 sender = (struct GNUNET_PeerIdentity *)
1330 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1332 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REPLY (%s)\n", GNUNET_i2s (sender));
1334 if (GNUNET_YES != Peers_check_peer_flag (sender, Peers_PULL_REPLY_PENDING))
1336 LOG (GNUNET_ERROR_TYPE_WARNING,
1337 "Received a pull reply from a peer we didn't request one from!\n");
1338 GNUNET_break_op (0);
1339 GNUNET_CADET_receive_done (channel);
1344 #ifdef ENABLE_MALICIOUS
1345 // We shouldn't even receive pull replies as we're not sending
1348 #endif /* ENABLE_MALICIOUS */
1350 /* Do actual logic */
1351 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1353 LOG (GNUNET_ERROR_TYPE_DEBUG,
1354 "PULL REPLY received, got following %u peers:\n",
1355 ntohl (in_msg->num_peers));
1357 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1359 LOG (GNUNET_ERROR_TYPE_DEBUG,
1362 GNUNET_i2s (&peers[i]));
1364 #ifdef ENABLE_MALICIOUS
1365 if ((NULL != att_peer_set) &&
1366 (1 == mal_type || 3 == mal_type))
1367 { /* Add attacked peer to local list */
1368 // TODO check if we sent a request and this was the first reply
1369 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1371 && GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (mal_peer_set,
1373 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&peers[i],
1376 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1377 tmp_att_peer->peer_id = peers[i];
1378 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1381 add_peer_array_to_set (&peers[i], 1, att_peer_set);
1385 #endif /* ENABLE_MALICIOUS */
1386 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity,
1389 /* Make sure we 'know' about this peer */
1390 (void) Peers_insert_peer_check_liveliness (&peers[i]);
1392 if (GNUNET_YES == Peers_check_peer_valid (&peers[i]))
1394 CustomPeerMap_put (pull_map, &peers[i]);
1398 Peers_schedule_operation (&peers[i], insert_in_pull_map);
1399 Peers_issue_peer_liveliness_check (&peers[i]);
1404 Peers_unset_peer_flag (sender, Peers_PULL_REPLY_PENDING);
1405 clean_peer (sender);
1407 GNUNET_CADET_receive_done (channel);
1413 * Compute a random delay.
1414 * A uniformly distributed value between mean + spread and mean - spread.
1416 * For example for mean 4 min and spread 2 the minimum is (4 min - (1/2 * 4 min))
1417 * It would return a random value between 2 and 6 min.
1419 * @param mean the mean
1420 * @param spread the inverse amount of deviation from the mean
1422 static struct GNUNET_TIME_Relative
1423 compute_rand_delay (struct GNUNET_TIME_Relative mean,
1424 unsigned int spread)
1426 struct GNUNET_TIME_Relative half_interval;
1427 struct GNUNET_TIME_Relative ret;
1428 unsigned int rand_delay;
1429 unsigned int max_rand_delay;
1433 LOG (GNUNET_ERROR_TYPE_WARNING,
1434 "Not accepting spread of 0\n");
1438 /* Compute random time value between spread * mean and spread * mean */
1439 half_interval = GNUNET_TIME_relative_divide (mean, spread);
1441 max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us / mean.rel_value_us * (2/spread);
1443 * Compute random value between (0 and 1) * round_interval
1444 * via multiplying round_interval with a 'fraction' (0 to value)/value
1446 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, max_rand_delay);
1447 ret = GNUNET_TIME_relative_multiply (mean, rand_delay);
1448 ret = GNUNET_TIME_relative_divide (ret, max_rand_delay);
1449 ret = GNUNET_TIME_relative_add (ret, half_interval);
1451 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
1452 LOG (GNUNET_ERROR_TYPE_WARNING,
1453 "Returning FOREVER_REL\n");
1460 * Send single pull request
1462 * @param peer_id the peer to send the pull request to.
1465 send_pull_request (const struct GNUNET_PeerIdentity *peer)
1467 struct GNUNET_MQ_Envelope *ev;
1469 GNUNET_assert (GNUNET_NO == Peers_check_peer_flag (peer,
1470 Peers_PULL_REPLY_PENDING));
1471 Peers_set_peer_flag (peer, Peers_PULL_REPLY_PENDING);
1473 LOG (GNUNET_ERROR_TYPE_DEBUG,
1474 "Going to send PULL REQUEST to peer %s.\n",
1477 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1478 Peers_send_message (peer, ev, "PULL REQUEST");
1485 * @param peer_id the peer to send the push to.
1488 send_push (const struct GNUNET_PeerIdentity *peer_id)
1490 struct GNUNET_MQ_Envelope *ev;
1492 LOG (GNUNET_ERROR_TYPE_DEBUG,
1493 "Going to send PUSH to peer %s.\n",
1494 GNUNET_i2s (peer_id));
1496 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1497 Peers_send_message (peer_id, ev, "PUSH");
1502 do_round (void *cls);
1505 do_mal_round (void *cls);
1508 #ifdef ENABLE_MALICIOUS
1510 * Turn RPS service to act malicious.
1512 * @param cls Closure
1513 * @param client The client that sent the message
1514 * @param msg The message header
1517 handle_client_act_malicious (void *cls,
1518 struct GNUNET_SERVER_Client *client,
1519 const struct GNUNET_MessageHeader *msg)
1521 struct GNUNET_RPS_CS_ActMaliciousMessage *in_msg;
1522 struct GNUNET_PeerIdentity *peers;
1523 uint32_t num_mal_peers_sent;
1524 uint32_t num_mal_peers_old;
1526 /* Check for protocol violation */
1527 if (sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage) > ntohs (msg->size))
1529 GNUNET_break_op (0);
1532 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1533 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1534 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1536 LOG (GNUNET_ERROR_TYPE_ERROR,
1537 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
1538 ntohl (in_msg->num_peers),
1539 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1540 sizeof (struct GNUNET_PeerIdentity));
1541 GNUNET_break_op (0);
1545 /* Do actual logic */
1546 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1547 mal_type = ntohl (in_msg->type);
1548 if (NULL == mal_peer_set)
1549 mal_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1551 LOG (GNUNET_ERROR_TYPE_DEBUG,
1552 "Now acting malicious type %" PRIu32 ", got %" PRIu32 " peers.\n",
1554 ntohl (in_msg->num_peers));
1557 { /* Try to maximise representation */
1558 /* Add other malicious peers to those we already know */
1560 num_mal_peers_sent = ntohl (in_msg->num_peers);
1561 num_mal_peers_old = num_mal_peers;
1562 GNUNET_array_grow (mal_peers,
1564 num_mal_peers + num_mal_peers_sent);
1565 memcpy (&mal_peers[num_mal_peers_old],
1567 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1569 /* Add all mal peers to mal_peer_set */
1570 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1574 /* Substitute do_round () with do_mal_round () */
1575 GNUNET_SCHEDULER_cancel (do_round_task);
1576 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1579 else if ( (2 == mal_type) ||
1581 { /* Try to partition the network */
1582 /* Add other malicious peers to those we already know */
1584 num_mal_peers_sent = ntohl (in_msg->num_peers) - 1;
1585 num_mal_peers_old = num_mal_peers;
1586 GNUNET_array_grow (mal_peers,
1588 num_mal_peers + num_mal_peers_sent);
1589 if (NULL != mal_peers &&
1592 memcpy (&mal_peers[num_mal_peers_old],
1594 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1596 /* Add all mal peers to mal_peer_set */
1597 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1602 /* Store the one attacked peer */
1603 memcpy (&attacked_peer,
1604 &in_msg->attacked_peer,
1605 sizeof (struct GNUNET_PeerIdentity));
1606 /* Set the flag of the attacked peer to valid to avoid problems */
1607 if (GNUNET_NO == Peers_check_peer_known (&attacked_peer))
1609 Peers_insert_peer_check_liveliness (&attacked_peer);
1610 Peers_issue_peer_liveliness_check (&attacked_peer);
1613 LOG (GNUNET_ERROR_TYPE_DEBUG,
1614 "Attacked peer is %s\n",
1615 GNUNET_i2s (&attacked_peer));
1617 /* Substitute do_round () with do_mal_round () */
1618 GNUNET_SCHEDULER_cancel (do_round_task);
1619 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1621 else if (0 == mal_type)
1622 { /* Stop acting malicious */
1623 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
1625 /* Substitute do_mal_round () with do_round () */
1626 GNUNET_SCHEDULER_cancel (do_round_task);
1627 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1633 GNUNET_SERVER_receive_done (client,
1639 * Send out PUSHes and PULLs maliciously.
1641 * This is executed regylary.
1644 do_mal_round (void *cls)
1646 uint32_t num_pushes;
1648 struct GNUNET_TIME_Relative time_next_round;
1649 struct AttackedPeer *tmp_att_peer;
1651 LOG (GNUNET_ERROR_TYPE_DEBUG,
1652 "Going to execute next round maliciously type %" PRIu32 ".\n",
1654 do_round_task = NULL;
1655 GNUNET_assert (mal_type <= 3);
1656 /* Do malicious actions */
1658 { /* Try to maximise representation */
1660 /* The maximum of pushes we're going to send this round */
1661 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit,
1662 num_attacked_peers),
1663 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1665 LOG (GNUNET_ERROR_TYPE_DEBUG,
1666 "Going to send %" PRIu32 " pushes\n",
1669 /* Send PUSHes to attacked peers */
1670 for (i = 0 ; i < num_pushes ; i++)
1672 if (att_peers_tail == att_peer_index)
1673 att_peer_index = att_peers_head;
1675 att_peer_index = att_peer_index->next;
1677 send_push (&att_peer_index->peer_id);
1680 /* Send PULLs to some peers to learn about additional peers to attack */
1681 tmp_att_peer = att_peer_index;
1682 for (i = 0 ; i < num_pushes * alpha ; i++)
1684 if (att_peers_tail == tmp_att_peer)
1685 tmp_att_peer = att_peers_head;
1687 att_peer_index = tmp_att_peer->next;
1689 send_pull_request (&tmp_att_peer->peer_id);
1694 else if (2 == mal_type)
1696 * Try to partition the network
1697 * Send as many pushes to the attacked peer as possible
1698 * That is one push per round as it will ignore more.
1700 Peers_insert_peer_check_liveliness (&attacked_peer);
1701 if (GNUNET_YES == Peers_check_peer_valid (&attacked_peer))
1702 send_push (&attacked_peer);
1707 { /* Combined attack */
1709 /* Send PUSH to attacked peers */
1710 if (GNUNET_YES == Peers_check_peer_known (&attacked_peer))
1712 Peers_insert_peer_check_liveliness (&attacked_peer);
1713 if (GNUNET_YES == Peers_check_peer_valid (&attacked_peer))
1715 LOG (GNUNET_ERROR_TYPE_DEBUG,
1716 "Goding to send push to attacked peer (%s)\n",
1717 GNUNET_i2s (&attacked_peer));
1718 send_push (&attacked_peer);
1721 Peers_issue_peer_liveliness_check (&attacked_peer);
1724 Peers_insert_peer_check_liveliness (&attacked_peer);
1725 Peers_issue_peer_liveliness_check (&attacked_peer);
1727 /* The maximum of pushes we're going to send this round */
1728 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit - 1,
1729 num_attacked_peers),
1730 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1732 LOG (GNUNET_ERROR_TYPE_DEBUG,
1733 "Going to send %" PRIu32 " pushes\n",
1736 for (i = 0; i < num_pushes; i++)
1738 if (att_peers_tail == att_peer_index)
1739 att_peer_index = att_peers_head;
1741 att_peer_index = att_peer_index->next;
1743 send_push (&att_peer_index->peer_id);
1746 /* Send PULLs to some peers to learn about additional peers to attack */
1747 tmp_att_peer = att_peer_index;
1748 for (i = 0; i < num_pushes * alpha; i++)
1750 if (att_peers_tail == tmp_att_peer)
1751 tmp_att_peer = att_peers_head;
1753 att_peer_index = tmp_att_peer->next;
1755 send_pull_request (&tmp_att_peer->peer_id);
1759 /* Schedule next round */
1760 time_next_round = compute_rand_delay (round_interval, 2);
1762 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round,
1764 GNUNET_assert (NULL == do_round_task);
1765 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
1766 &do_mal_round, NULL);
1767 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1769 #endif /* ENABLE_MALICIOUS */
1773 * Send out PUSHes and PULLs, possibly update #view, samplers.
1775 * This is executed regylary.
1778 do_round (void *cls)
1781 const struct GNUNET_PeerIdentity *view_array;
1782 unsigned int *permut;
1783 unsigned int a_peers; /* Number of peers we send pushes to */
1784 unsigned int b_peers; /* Number of peers we send pull requests to */
1785 uint32_t first_border;
1786 uint32_t second_border;
1787 struct GNUNET_PeerIdentity peer;
1788 struct GNUNET_PeerIdentity *update_peer;
1790 LOG (GNUNET_ERROR_TYPE_DEBUG,
1791 "Going to execute next round.\n");
1792 do_round_task = NULL;
1793 LOG (GNUNET_ERROR_TYPE_DEBUG,
1794 "Printing view:\n");
1795 to_file (file_name_view_log,
1796 "___ new round ___");
1797 view_array = View_get_as_array ();
1798 for (i = 0; i < View_size (); i++)
1800 LOG (GNUNET_ERROR_TYPE_DEBUG,
1801 "\t%s\n", GNUNET_i2s (&view_array[i]));
1802 to_file (file_name_view_log,
1804 GNUNET_i2s_full (&view_array[i]));
1808 /* Send pushes and pull requests */
1809 if (0 < View_size ())
1811 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1815 a_peers = ceil (alpha * View_size ());
1817 LOG (GNUNET_ERROR_TYPE_DEBUG,
1818 "Going to send pushes to %u (ceil (%f * %u)) peers.\n",
1819 a_peers, alpha, View_size ());
1820 for (i = 0; i < a_peers; i++)
1822 peer = view_array[permut[i]];
1823 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1824 { // FIXME if this fails schedule/loop this for later
1829 /* Send PULL requests */
1830 b_peers = ceil (beta * View_size ());
1831 first_border = a_peers;
1832 second_border = a_peers + b_peers;
1833 if (second_border > View_size ())
1835 first_border = View_size () - b_peers;
1836 second_border = View_size ();
1838 LOG (GNUNET_ERROR_TYPE_DEBUG,
1839 "Going to send pulls to %u (ceil (%f * %u)) peers.\n",
1840 b_peers, beta, View_size ());
1841 for (i = first_border; i < second_border; i++)
1843 peer = view_array[permut[i]];
1844 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer) &&
1845 GNUNET_NO == Peers_check_peer_flag (&peer, Peers_PULL_REPLY_PENDING)) // TODO
1846 { // FIXME if this fails schedule/loop this for later
1847 send_pull_request (&peer);
1851 GNUNET_free (permut);
1857 /* TODO see how many peers are in push-/pull- list! */
1859 if ((CustomPeerMap_size (push_map) <= alpha * View_size ()) &&
1860 (0 < CustomPeerMap_size (push_map)) &&
1861 (0 < CustomPeerMap_size (pull_map)))
1862 { /* If conditions for update are fulfilled, update */
1863 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the view.\n");
1865 uint32_t final_size;
1866 uint32_t peers_to_clean_size;
1867 struct GNUNET_PeerIdentity *peers_to_clean;
1869 peers_to_clean = NULL;
1870 peers_to_clean_size = 0;
1871 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, View_size ());
1872 memcpy (peers_to_clean,
1874 View_size () * sizeof (struct GNUNET_PeerIdentity));
1876 /* Seems like recreating is the easiest way of emptying the peermap */
1878 to_file (file_name_view_log,
1881 first_border = GNUNET_MIN (ceil (alpha * sampler_size_est_need),
1882 CustomPeerMap_size (push_map));
1883 second_border = first_border +
1884 GNUNET_MIN (floor (beta * sampler_size_est_need),
1885 CustomPeerMap_size (pull_map));
1886 final_size = second_border +
1887 ceil ((1 - (alpha + beta)) * sampler_size_est_need);
1889 /* Update view with peers received through PUSHes */
1890 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1891 CustomPeerMap_size (push_map));
1892 for (i = 0; i < first_border; i++)
1894 View_put (CustomPeerMap_get_peer_by_index (push_map, permut[i]));
1895 to_file (file_name_view_log,
1897 GNUNET_i2s_full (&view_array[i]));
1898 // TODO change the peer_flags accordingly
1900 GNUNET_free (permut);
1903 /* Update view with peers received through PULLs */
1904 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1905 CustomPeerMap_size (pull_map));
1906 for (i = first_border; i < second_border; i++)
1908 View_put (CustomPeerMap_get_peer_by_index (pull_map,
1909 permut[i - first_border]));
1910 to_file (file_name_view_log,
1912 GNUNET_i2s_full (&view_array[i]));
1913 // TODO change the peer_flags accordingly
1915 GNUNET_free (permut);
1918 /* Update view with peers from history */
1919 RPS_sampler_get_n_rand_peers (prot_sampler,
1922 final_size - second_border);
1923 num_hist_update_tasks = final_size - second_border;
1924 // TODO change the peer_flags accordingly
1926 for (i = 0; i < View_size (); i++)
1927 rem_from_list (&peers_to_clean, &peers_to_clean_size, &view_array[i]);
1929 /* Clean peers that were removed from the view */
1930 for (i = 0; i < peers_to_clean_size; i++)
1932 to_file (file_name_view_log,
1934 GNUNET_i2s_full (&peers_to_clean[i]));
1935 Peers_clean_peer (&peers_to_clean[i]);
1936 //peer_destroy_channel_send (sender);
1939 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, 0);
1940 peers_to_clean = NULL;
1944 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the view.\n");
1946 // TODO independent of that also get some peers from CADET_get_peers()?
1948 LOG (GNUNET_ERROR_TYPE_DEBUG,
1949 "Received %u pushes and %u pulls last round (alpha (%.2f) * view_size (%u) = %.2f)\n",
1950 CustomPeerMap_size (push_map),
1951 CustomPeerMap_size (pull_map),
1954 alpha * View_size ());
1956 /* Update samplers */
1957 for (i = 0; i < CustomPeerMap_size (push_map); i++)
1959 update_peer = CustomPeerMap_get_peer_by_index (push_map, i);
1960 LOG (GNUNET_ERROR_TYPE_DEBUG,
1961 "Updating with peer %s from push list\n",
1962 GNUNET_i2s (update_peer));
1963 insert_in_sampler (NULL, update_peer);
1964 Peers_clean_peer (update_peer); /* This cleans only if it is not in the view */
1965 //peer_destroy_channel_send (sender);
1968 for (i = 0; i < CustomPeerMap_size (pull_map); i++)
1970 LOG (GNUNET_ERROR_TYPE_DEBUG,
1971 "Updating with peer %s from pull list\n",
1972 GNUNET_i2s (CustomPeerMap_get_peer_by_index (pull_map, i)));
1973 insert_in_sampler (NULL, CustomPeerMap_get_peer_by_index (pull_map, i));
1974 /* This cleans only if it is not in the view */
1975 Peers_clean_peer (CustomPeerMap_get_peer_by_index (pull_map, i));
1976 //peer_destroy_channel_send (sender);
1980 /* Empty push/pull lists */
1981 CustomPeerMap_clear (push_map);
1982 CustomPeerMap_clear (pull_map);
1984 struct GNUNET_TIME_Relative time_next_round;
1986 time_next_round = compute_rand_delay (round_interval, 2);
1988 /* Schedule next round */
1989 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
1991 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1996 rps_start (struct GNUNET_SERVER_Handle *server);
2000 * This is called from GNUNET_CADET_get_peers().
2002 * It is called on every peer(ID) that cadet somehow has contact with.
2003 * We use those to initialise the sampler.
2006 init_peer_cb (void *cls,
2007 const struct GNUNET_PeerIdentity *peer,
2008 int tunnel, // "Do we have a tunnel towards this peer?"
2009 unsigned int n_paths, // "Number of known paths towards this peer"
2010 unsigned int best_path) // "How long is the best path?
2011 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
2015 LOG (GNUNET_ERROR_TYPE_DEBUG,
2016 "Got peer_id %s from cadet\n",
2024 * Iterator over peers from peerinfo.
2026 * @param cls closure
2027 * @param peer id of the peer, NULL for last call
2028 * @param hello hello message for the peer (can be NULL)
2029 * @param error message
2032 process_peerinfo_peers (void *cls,
2033 const struct GNUNET_PeerIdentity *peer,
2034 const struct GNUNET_HELLO_Message *hello,
2035 const char *err_msg)
2039 LOG (GNUNET_ERROR_TYPE_DEBUG,
2040 "Got peer_id %s from peerinfo\n",
2048 * Task run during shutdown.
2053 shutdown_task (void *cls)
2055 LOG (GNUNET_ERROR_TYPE_DEBUG,
2056 "RPS is going down\n");
2057 GNUNET_PEERINFO_notify_cancel (peerinfo_notify_handle);
2058 GNUNET_PEERINFO_disconnect (peerinfo_handle);
2060 if (NULL != do_round_task)
2062 GNUNET_SCHEDULER_cancel (do_round_task);
2063 do_round_task = NULL;
2068 GNUNET_NSE_disconnect (nse);
2069 RPS_sampler_destroy (prot_sampler);
2070 RPS_sampler_destroy (client_sampler);
2071 GNUNET_CADET_disconnect (cadet_handle);
2073 CustomPeerMap_destroy (push_map);
2074 CustomPeerMap_destroy (pull_map);
2075 #ifdef ENABLE_MALICIOUS
2076 struct AttackedPeer *tmp_att_peer;
2077 GNUNET_free (file_name_view_log);
2078 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
2079 if (NULL != mal_peer_set)
2080 GNUNET_CONTAINER_multipeermap_destroy (mal_peer_set);
2081 if (NULL != att_peer_set)
2082 GNUNET_CONTAINER_multipeermap_destroy (att_peer_set);
2083 while (NULL != att_peers_head)
2085 tmp_att_peer = att_peers_head;
2086 GNUNET_CONTAINER_DLL_remove (att_peers_head, att_peers_tail, tmp_att_peer);
2088 #endif /* ENABLE_MALICIOUS */
2093 * @brief Get informed about a connecting client.
2096 * @param client the client that connects
2099 handle_client_connect (void *cls,
2100 struct GNUNET_SERVER_Client *client)
2102 struct ClientContext *cli_ctx;
2104 LOG (GNUNET_ERROR_TYPE_DEBUG,
2105 "Client connected\n");
2107 return; /* Server was destroyed before a client connected. Shutting down */
2108 cli_ctx = GNUNET_new (struct ClientContext);
2109 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (client);
2110 GNUNET_SERVER_client_set_user_context (client, cli_ctx);
2111 GNUNET_CONTAINER_DLL_insert (cli_ctx_head,
2117 * A client disconnected. Remove all of its data structure entries.
2119 * @param cls closure, NULL
2120 * @param client identification of the client
2123 handle_client_disconnect (void *cls,
2124 struct GNUNET_SERVER_Client *client)
2126 struct ClientContext *cli_ctx;
2129 {/* shutdown task */
2130 while (NULL != cli_ctx_head)
2131 destroy_cli_ctx (cli_ctx_head);
2135 cli_ctx = GNUNET_SERVER_client_get_user_context (client, struct ClientContext);
2136 destroy_cli_ctx (cli_ctx);
2142 * Actually start the service.
2145 rps_start (struct GNUNET_SERVER_Handle *server)
2147 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
2148 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
2149 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
2150 {&handle_client_request_cancel, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST_CANCEL,
2151 sizeof (struct GNUNET_RPS_CS_RequestCancelMessage)},
2152 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
2153 #ifdef ENABLE_MALICIOUS
2154 {&handle_client_act_malicious, NULL, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
2155 #endif /* ENABLE_MALICIOUS */
2159 GNUNET_SERVER_add_handlers (server, handlers);
2160 GNUNET_SERVER_connect_notify (server,
2161 &handle_client_connect,
2163 GNUNET_SERVER_disconnect_notify (server,
2164 &handle_client_disconnect,
2166 LOG (GNUNET_ERROR_TYPE_INFO, "Ready to receive requests from clients\n");
2169 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
2170 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
2172 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
2178 * Process statistics requests.
2180 * @param cls closure
2181 * @param server the initialized server
2182 * @param c configuration to use
2186 struct GNUNET_SERVER_Handle *server,
2187 const struct GNUNET_CONFIGURATION_Handle *c)
2191 char* fn_valid_peers;
2193 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2198 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2199 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2200 "STARTING SERVICE (rps) for peer [%s]\n",
2201 GNUNET_i2s (&own_identity));
2202 #ifdef ENABLE_MALICIOUS
2203 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2204 "Malicious execution compiled in.\n");
2205 #endif /* ENABLE_MALICIOUS */
2209 /* Get time interval from the configuration */
2210 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2214 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2215 "RPS", "ROUNDINTERVAL");
2216 GNUNET_SCHEDULER_shutdown ();
2220 /* Get initial size of sampler/view from the configuration */
2222 GNUNET_CONFIGURATION_get_value_number (cfg, "RPS", "INITSIZE",
2223 (long long unsigned int *) &sampler_size_est_need))
2225 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2227 GNUNET_SCHEDULER_shutdown ();
2230 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %u\n", sampler_size_est_need);
2233 GNUNET_CONFIGURATION_get_value_filename (cfg,
2235 "FILENAME_VALID_PEERS",
2238 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2239 "rps", "FILENAME_VALID_PEERS");
2245 /* file_name_view_log */
2246 if (GNUNET_OK != GNUNET_DISK_directory_create ("/tmp/rps/"))
2248 LOG (GNUNET_ERROR_TYPE_WARNING,
2249 "Failed to create directory /tmp/rps/\n");
2252 size = (14 + strlen (GNUNET_i2s_full (&own_identity)) + 1) * sizeof (char);
2253 file_name_view_log = GNUNET_malloc (size);
2254 out_size = GNUNET_snprintf (file_name_view_log,
2257 GNUNET_i2s_full (&own_identity));
2258 if (size < out_size ||
2261 LOG (GNUNET_ERROR_TYPE_WARNING,
2262 "Failed to write string to buffer (size: %i, out_size: %i)\n",
2268 /* connect to NSE */
2269 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2276 /* Initialise cadet */
2277 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2278 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
2279 sizeof (struct GNUNET_MessageHeader)},
2280 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2281 sizeof (struct GNUNET_MessageHeader)},
2282 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
2285 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
2286 cadet_handle = GNUNET_CADET_connect (cfg,
2288 &Peers_handle_inbound_channel,
2289 &cleanup_destroyed_channel,
2293 peerinfo_handle = GNUNET_PEERINFO_connect (cfg);
2294 Peers_initialise (fn_valid_peers, cadet_handle, &own_identity);
2295 GNUNET_free (fn_valid_peers);
2297 /* Initialise sampler */
2298 struct GNUNET_TIME_Relative half_round_interval;
2299 struct GNUNET_TIME_Relative max_round_interval;
2301 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2302 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2304 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2305 client_sampler = RPS_sampler_mod_init (sampler_size_est_need, max_round_interval);
2307 /* Initialise push and pull maps */
2308 push_map = CustomPeerMap_create (4);
2309 pull_map = CustomPeerMap_create (4);
2312 num_hist_update_tasks = 0;
2315 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2316 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2317 // TODO send push/pull to each of those peers?
2318 // TODO read stored valid peers from last run
2320 peerinfo_notify_handle = GNUNET_PEERINFO_notify (cfg,
2322 process_peerinfo_peers,
2330 * The main function for the rps service.
2332 * @param argc number of arguments from the command line
2333 * @param argv command line arguments
2334 * @return 0 ok, 1 on error
2337 main (int argc, char *const *argv)
2339 return (GNUNET_OK ==
2340 GNUNET_SERVICE_run (argc,
2343 GNUNET_SERVICE_OPTION_NONE,
2344 &run, NULL)) ? 0 : 1;
2347 /* end of gnunet-service-rps.c */