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22 * @file rps/gnunet-service-rps.c
23 * @brief rps service implementation
24 * @author Julius Bünger
27 #include "gnunet_util_lib.h"
28 #include "gnunet_cadet_service.h"
29 #include "gnunet_nse_service.h"
32 #include "gnunet-service-rps_sampler.h"
37 #define LOG(kind, ...) GNUNET_log(kind, __VA_ARGS__)
39 // TODO modify @brief in every file
41 // TODO check for overflows
43 // TODO align message structs
45 // (TODO api -- possibility of getting weak random peer immideately)
47 // TODO connect to friends
49 // TODO store peers somewhere
53 // hist_size_init, hist_size_max
58 static const struct GNUNET_CONFIGURATION_Handle *cfg;
63 static struct GNUNET_PeerIdentity own_identity;
66 struct GNUNET_PeerIdentity *
67 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list, unsigned int size,
68 const struct GNUNET_PeerIdentity *ignore_list, unsigned int ignore_size);
71 /***********************************************************************
72 * Housekeeping with peers
73 ***********************************************************************/
76 * Struct used to store the context of a connected client.
81 * The message queue to communicate with the client.
83 struct GNUNET_MQ_Handle *mq;
87 * Used to keep track in what lists single peerIDs are.
91 PULL_REPLY_PENDING = 0x01,
92 IN_OTHER_GOSSIP_LIST = 0x02, // unneeded?
93 IN_OWN_SAMPLER_LIST = 0x04, // unneeded?
94 IN_OWN_GOSSIP_LIST = 0x08, // unneeded?
97 * We set this bit when we can be sure the other peer is/was live.
104 * Functions of this type can be used to be stored at a peer for later execution.
106 typedef void (* PeerOp) (void *cls, const struct GNUNET_PeerIdentity *peer);
109 * Outstanding operation on peer consisting of callback and closure
111 struct PeerOutstandingOp
126 * Struct used to keep track of other peer's status
128 * This is stored in a multipeermap.
133 * In own gossip/sampler list, in other's gossip/sampler list
138 * Message queue open to client
140 struct GNUNET_MQ_Handle *mq;
143 * Channel open to client.
145 struct GNUNET_CADET_Channel *send_channel;
148 * Channel open from client.
150 struct GNUNET_CADET_Channel *recv_channel; // unneeded?
153 * Array of outstanding operations on this peer.
155 struct PeerOutstandingOp *outstanding_ops;
158 * Number of outstanding operations.
160 unsigned int num_outstanding_ops;
161 //size_t num_outstanding_ops;
164 * Handle to the callback given to cadet_ntfy_tmt_rdy()
166 * To be canceled on shutdown.
168 struct GNUNET_CADET_TransmitHandle *is_live_task;
171 * Identity of the peer
173 struct GNUNET_PeerIdentity peer_id;
176 * This is pobably followed by 'statistical' data (when we first saw
177 * him, how did we get his ID, how many pushes (in a timeinterval),
182 /***********************************************************************
183 * /Housekeeping with peers
184 ***********************************************************************/
190 /***********************************************************************
192 ***********************************************************************/
195 * Sampler used for the Brahms protocol itself.
197 static struct RPS_Sampler *prot_sampler;
200 * Sampler used for the clients.
202 static struct RPS_Sampler *client_sampler;
205 * Set of all peers to keep track of them.
207 static struct GNUNET_CONTAINER_MultiPeerMap *peer_map;
211 * The gossiped list of peers.
213 static struct GNUNET_PeerIdentity *gossip_list;
216 * Size of the gossiped list
218 //static unsigned int gossip_list_size;
219 static uint32_t gossip_list_size;
223 * The size of sampler we need to be able to satisfy the client's need of
226 static unsigned int sampler_size_client_need;
229 * The size of sampler we need to be able to satisfy the Brahms protocol's
230 * need of random peers.
232 * This is directly taken as the #gossip_list_size on update of the
235 * This is one minimum size the sampler grows to.
237 static unsigned int sampler_size_est_need;
241 * Percentage of total peer number in the gossip list
242 * to send random PUSHes to
247 * Percentage of total peer number in the gossip list
248 * to send random PULLs to
253 * The percentage gamma of history updates.
254 * Simply 1 - alpha - beta
259 * Identifier for the main task that runs periodically.
261 static struct GNUNET_SCHEDULER_Task *do_round_task;
264 * Time inverval the do_round task runs in.
266 static struct GNUNET_TIME_Relative round_interval;
271 * List to store peers received through pushes temporary.
273 * TODO -> multipeermap
275 static struct GNUNET_PeerIdentity *push_list;
278 * Size of the push_list;
280 static unsigned int push_list_size;
281 //size_t push_list_size;
284 * List to store peers received through pulls temporary.
286 * TODO -> multipeermap
288 static struct GNUNET_PeerIdentity *pull_list;
291 * Size of the pull_list;
293 static unsigned int pull_list_size;
294 //size_t pull_list_size;
300 static struct GNUNET_NSE_Handle *nse;
305 static struct GNUNET_CADET_Handle *cadet_handle;
311 * Only needed in the beginning to check how many of the 64 deltas
314 static unsigned int req_counter;
317 * Time of the last request we received.
319 * Used to compute the expected request rate.
321 static struct GNUNET_TIME_Absolute last_request;
324 * Size of #request_deltas.
326 #define REQUEST_DELTAS_SIZE 64
327 static unsigned int request_deltas_size = REQUEST_DELTAS_SIZE;
330 * Last 64 deltas between requests
332 static struct GNUNET_TIME_Relative request_deltas[REQUEST_DELTAS_SIZE];
335 * The prediction of the rate of requests
337 static struct GNUNET_TIME_Relative request_rate;
341 * List with the peers we sent requests to.
343 struct GNUNET_PeerIdentity *pending_pull_reply_list;
346 * Size of #pending_pull_reply_list.
348 uint32_t pending_pull_reply_list_size;
352 * Number of history update tasks.
354 uint32_t num_hist_update_tasks;
358 * Closure used to pass the client and the id to the callback
359 * that replies to a client's request
364 * The identifier of the request
369 * The client handle to send the reply to
371 struct GNUNET_SERVER_Client *client;
375 #ifdef ENABLE_MALICIOUS
377 * Type of malicious peer
379 * 0 Don't act malicious at all - Default
380 * 1 Try to maximise representation
381 * 2 Try to partition the network
383 uint32_t mal_type = 0;
386 * Other malicious peers
388 static struct GNUNET_PeerIdentity *mal_peers = NULL;
391 * Hashmap of malicious peers used as set.
392 * Used to more efficiently check whether we know that peer.
394 static struct GNUNET_CONTAINER_MultiPeerMap *mal_peer_set = NULL;
397 * Number of other malicious peers
399 static uint32_t num_mal_peers = 0;
403 * If type is 2 This struct is used to store the attacked peers in a DLL
410 struct AttackedPeer *next;
411 struct AttackedPeer *prev;
416 struct GNUNET_PeerIdentity peer_id;
420 * If type is 2 this is the DLL of attacked peers
422 static struct AttackedPeer *att_peers_head = NULL;
423 static struct AttackedPeer *att_peers_tail = NULL;
426 * This index is used to point to an attacked peer to
427 * implement the round-robin-ish way to select attacked peers.
429 static struct AttackedPeer *att_peer_index = NULL;
432 * Hashmap of attacked peers used as set.
433 * Used to more efficiently check whether we know that peer.
435 static struct GNUNET_CONTAINER_MultiPeerMap *att_peer_set = NULL;
438 * Number of attacked peers
440 static uint32_t num_attacked_peers = 0;
444 * If type is 1 this is the attacked peer
446 static struct GNUNET_PeerIdentity attacked_peer;
449 * The limit of PUSHes we can send in one round.
450 * This is an assumption of the Brahms protocol and either implemented
453 * assumend to be the bandwidth limitation.
455 static uint32_t push_limit = 10000;
456 #endif /* ENABLE_MALICIOUS */
459 /***********************************************************************
461 ***********************************************************************/
468 /***********************************************************************
470 ***********************************************************************/
473 * Set a peer flag of given peer context.
475 #define set_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags |= mask)
478 * Get peer flag of given peer context.
480 #define get_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags & mask ? GNUNET_YES : GNUNET_NO)
483 * Unset flag of given peer context.
485 #define unset_peer_flag(peer_ctx, mask) (peer_ctx->peer_flags &= (~mask))
488 * Compute the minimum of two ints
490 #define min(x, y) ((x < y) ? x : y)
493 * Clean the send channel of a peer
496 peer_clean (const struct GNUNET_PeerIdentity *peer);
500 * Check if peer is already in peer array.
503 in_arr (const struct GNUNET_PeerIdentity *array,
504 unsigned int arr_size,
505 const struct GNUNET_PeerIdentity *peer)
507 GNUNET_assert (NULL != peer);
512 GNUNET_assert (NULL != array);
516 for (i = 0; i < arr_size ; i++)
517 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&array[i], peer))
524 * Print peerlist to log.
527 print_peer_list (struct GNUNET_PeerIdentity *list, unsigned int len)
531 LOG (GNUNET_ERROR_TYPE_DEBUG,
532 "Printing peer list of length %u at %p:\n",
535 for (i = 0 ; i < len ; i++)
537 LOG (GNUNET_ERROR_TYPE_DEBUG,
539 i, GNUNET_i2s (&list[i]));
545 * Remove peer from list.
548 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
549 unsigned int *list_size,
550 const struct GNUNET_PeerIdentity *peer)
553 struct GNUNET_PeerIdentity *tmp;
557 LOG (GNUNET_ERROR_TYPE_DEBUG,
558 "Removing peer %s from list at %p\n",
562 for ( i = 0 ; i < *list_size ; i++ )
564 if (0 == GNUNET_CRYPTO_cmp_peer_identity (&tmp[i], peer))
566 if (i < *list_size -1)
567 { /* Not at the last entry -- shift peers left */
568 memcpy (&tmp[i], &tmp[i +1],
569 ((*list_size) - i -1) * sizeof (struct GNUNET_PeerIdentity));
571 /* Remove last entry (should be now useless PeerID) */
572 GNUNET_array_grow (tmp, *list_size, (*list_size) -1);
579 * Get random peer from the given list but don't return one from the @a ignore_list.
581 struct GNUNET_PeerIdentity *
582 get_rand_peer_ignore_list (const struct GNUNET_PeerIdentity *peer_list,
584 const struct GNUNET_PeerIdentity *ignore_list,
585 uint32_t ignore_size)
589 struct GNUNET_PeerIdentity *tmp_peer_list;
590 struct GNUNET_PeerIdentity *peer;
592 GNUNET_assert (NULL != peer_list);
597 tmp_peer_list = NULL;
598 GNUNET_array_grow (tmp_peer_list, tmp_size, list_size);
599 memcpy (tmp_peer_list,
601 list_size * sizeof (struct GNUNET_PeerIdentity));
602 peer = GNUNET_new (struct GNUNET_PeerIdentity);
605 * Choose the r_index of the peer we want to return
606 * at random from the interval of the gossip list
608 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
610 *peer = tmp_peer_list[r_index];
612 while (in_arr (ignore_list, ignore_size, peer))
614 rem_from_list (&tmp_peer_list, &tmp_size, peer);
616 print_peer_list (tmp_peer_list, tmp_size);
625 * Choose the r_index of the peer we want to return
626 * at random from the interval of the gossip list
628 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
630 *peer = tmp_peer_list[r_index];
634 GNUNET_array_grow (tmp_peer_list, tmp_size, 0);
641 * Get the context of a peer. If not existing, create.
644 get_peer_ctx (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
645 const struct GNUNET_PeerIdentity *peer)
647 struct PeerContext *ctx;
649 if ( GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
651 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
655 ctx = GNUNET_new (struct PeerContext);
658 ctx->send_channel = NULL;
659 ctx->recv_channel = NULL;
660 ctx->outstanding_ops = NULL;
661 ctx->num_outstanding_ops = 0;
662 ctx->is_live_task = NULL;
663 ctx->peer_id = *peer;
664 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
665 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
672 * Put random peer from sampler into the gossip list as history update.
675 hist_update (void *cls, struct GNUNET_PeerIdentity *ids, uint32_t num_peers)
677 GNUNET_assert (1 == num_peers);
679 if (gossip_list_size < sampler_size_est_need)
680 GNUNET_array_append (gossip_list, gossip_list_size, *ids);
682 if (0 < num_hist_update_tasks)
683 num_hist_update_tasks--;
688 * Set the peer flag to living and call the outstanding operations on this peer.
691 peer_is_live (struct PeerContext *peer_ctx)
693 struct GNUNET_PeerIdentity *peer;
695 /* Cancle is_live_task if still scheduled */
696 if (NULL != peer_ctx->is_live_task)
698 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
699 peer_ctx->is_live_task = NULL;
702 peer = &peer_ctx->peer_id;
703 set_peer_flag (peer_ctx, VALID);
705 LOG (GNUNET_ERROR_TYPE_DEBUG, "Peer %s is live\n", GNUNET_i2s (peer));
707 if (0 < peer_ctx->num_outstanding_ops)
708 { /* Call outstanding operations */
711 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
712 peer_ctx->outstanding_ops[i].op (peer_ctx->outstanding_ops[i].op_cls, peer);
713 GNUNET_array_grow (peer_ctx->outstanding_ops, peer_ctx->num_outstanding_ops, 0);
721 * Callback that is called when a channel was effectively established.
722 * This is given to ntfy_tmt_rdy and called when the channel was
723 * successfully established.
726 cadet_ntfy_tmt_rdy_cb (void *cls, size_t size, void *buf)
728 struct PeerContext *peer_ctx = (struct PeerContext *) cls;
730 peer_ctx->is_live_task = NULL;
731 LOG (GNUNET_ERROR_TYPE_DEBUG,
732 "Set ->is_live_task = NULL for peer %s\n",
733 GNUNET_i2s (&peer_ctx->peer_id));
738 peer_is_live (peer_ctx);
742 LOG (GNUNET_ERROR_TYPE_WARNING,
743 "Problems establishing a connection to peer %s in order to check liveliness\n",
744 GNUNET_i2s (&peer_ctx->peer_id));
745 // TODO reschedule? cleanup?
748 //if (NULL != peer_ctx->is_live_task)
750 // LOG (GNUNET_ERROR_TYPE_DEBUG,
751 // "Trying to cancle is_live_task for peer %s\n",
752 // GNUNET_i2s (&peer_ctx->peer_id));
753 // GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
754 // peer_ctx->is_live_task = NULL;
762 * Get the channel of a peer. If not existing, create.
764 struct GNUNET_CADET_Channel *
765 get_channel (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
766 const struct GNUNET_PeerIdentity *peer)
768 struct PeerContext *peer_ctx;
770 peer_ctx = get_peer_ctx (peer_map, peer);
772 GNUNET_assert (NULL == peer_ctx->is_live_task);
774 if (NULL == peer_ctx->send_channel)
776 LOG (GNUNET_ERROR_TYPE_DEBUG,
777 "Trying to establish channel to peer %s\n",
780 peer_ctx->send_channel =
781 GNUNET_CADET_channel_create (cadet_handle,
784 GNUNET_RPS_CADET_PORT,
785 GNUNET_CADET_OPTION_RELIABLE);
787 // do I have to explicitly put it in the peer_map?
788 (void) GNUNET_CONTAINER_multipeermap_put
792 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
794 return peer_ctx->send_channel;
799 * Get the message queue of a specific peer.
801 * If we already have a message queue open to this client,
802 * simply return it, otherways create one.
804 struct GNUNET_MQ_Handle *
805 get_mq (struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
806 const struct GNUNET_PeerIdentity *peer_id)
808 struct PeerContext *peer_ctx;
810 peer_ctx = get_peer_ctx (peer_map, peer_id);
812 GNUNET_assert (NULL == peer_ctx->is_live_task);
814 if (NULL == peer_ctx->mq)
816 (void) get_channel (peer_map, peer_id);
817 peer_ctx->mq = GNUNET_CADET_mq_create (peer_ctx->send_channel);
818 //do I have to explicitly put it in the peer_map?
819 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, peer_id, peer_ctx,
820 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
827 * Issue check whether peer is live
829 * @param peer_ctx the context of the peer
832 check_peer_live (struct PeerContext *peer_ctx)
834 (void) get_channel (peer_map, &peer_ctx->peer_id);
835 LOG (GNUNET_ERROR_TYPE_DEBUG,
836 "Get informed about peer %s getting live\n",
837 GNUNET_i2s (&peer_ctx->peer_id));
838 if (NULL == peer_ctx->is_live_task)
840 peer_ctx->is_live_task =
841 GNUNET_CADET_notify_transmit_ready (peer_ctx->send_channel,
843 GNUNET_TIME_UNIT_FOREVER_REL,
844 sizeof (struct GNUNET_MessageHeader),
845 cadet_ntfy_tmt_rdy_cb,
850 LOG (GNUNET_ERROR_TYPE_DEBUG,
851 "Already waiting for notification\n");
857 * Sum all time relatives of an array.
859 struct GNUNET_TIME_Relative
860 T_relative_sum (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
862 struct GNUNET_TIME_Relative sum;
865 sum = GNUNET_TIME_UNIT_ZERO;
866 for ( i = 0 ; i < arr_size ; i++ )
868 sum = GNUNET_TIME_relative_add (sum, rel_array[i]);
875 * Compute the average of given time relatives.
877 struct GNUNET_TIME_Relative
878 T_relative_avg (const struct GNUNET_TIME_Relative *rel_array, uint32_t arr_size)
880 return GNUNET_TIME_relative_divide (T_relative_sum (rel_array, arr_size), arr_size);
885 * Insert PeerID in #pull_list
887 * Called once we know a peer is live.
890 insert_in_pull_list (void *cls, const struct GNUNET_PeerIdentity *peer)
892 if (GNUNET_NO == in_arr (pull_list, pull_list_size, peer))
893 GNUNET_array_append (pull_list, pull_list_size, *peer);
899 * Check whether #insert_in_pull_list was already scheduled
902 insert_in_pull_list_scheduled (const struct PeerContext *peer_ctx)
906 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
907 if (insert_in_pull_list == peer_ctx->outstanding_ops[i].op)
914 * Insert PeerID in #gossip_list
916 * Called once we know a peer is live.
919 insert_in_gossip_list (void *cls, const struct GNUNET_PeerIdentity *peer)
921 if (GNUNET_NO == in_arr (gossip_list, gossip_list_size, peer))
922 GNUNET_array_append (gossip_list, gossip_list_size, *peer);
924 (void) get_channel (peer_map, peer);
928 * Check whether #insert_in_gossip_list was already scheduled
931 insert_in_gossip_list_scheduled (const struct PeerContext *peer_ctx)
935 for ( i = 0 ; i < peer_ctx->num_outstanding_ops ; i++ )
936 if (insert_in_gossip_list == peer_ctx->outstanding_ops[i].op)
943 * Update sampler with given PeerID.
946 insert_in_sampler (void *cls, const struct GNUNET_PeerIdentity *peer)
948 LOG (GNUNET_ERROR_TYPE_DEBUG,
949 "Updating samplers with peer %s from insert_in_sampler()\n",
951 RPS_sampler_update (prot_sampler, peer);
952 RPS_sampler_update (client_sampler, peer);
957 * Check whether #insert_in_sampler was already scheduled
960 insert_in_sampler_scheduled (const struct PeerContext *peer_ctx)
964 for (i = 0 ; i < peer_ctx->num_outstanding_ops ; i++)
965 if (insert_in_sampler== peer_ctx->outstanding_ops[i].op)
972 * Wrapper around #RPS_sampler_resize()
974 * If we do not have enough sampler elements, double current sampler size
975 * If we have more than enough sampler elements, halv current sampler size
978 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
980 unsigned int sampler_size;
983 // TODO respect the min, max
984 sampler_size = RPS_sampler_get_size (sampler);
985 if (sampler_size > new_size * 4)
987 RPS_sampler_resize (sampler, sampler_size / 2);
989 else if (sampler_size < new_size)
991 RPS_sampler_resize (sampler, sampler_size * 2);
993 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
998 * Wrapper around #RPS_sampler_resize() resizing the client sampler
1001 client_resize_wrapper ()
1003 uint32_t bigger_size;
1004 unsigned int sampler_size;
1008 sampler_size = RPS_sampler_get_size (client_sampler);
1010 if (sampler_size_est_need > sampler_size_client_need)
1011 bigger_size = sampler_size_est_need;
1013 bigger_size = sampler_size_client_need;
1015 // TODO respect the min, max
1016 resize_wrapper (client_sampler, bigger_size);
1017 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
1022 * Estimate request rate
1024 * Called every time we receive a request from the client.
1029 struct GNUNET_TIME_Relative max_round_duration;
1031 if (request_deltas_size > req_counter)
1033 if ( 1 < req_counter)
1035 /* Shift last request deltas to the right */
1036 memcpy (&request_deltas[1],
1038 (req_counter - 1) * sizeof (struct GNUNET_TIME_Relative));
1040 /* Add current delta to beginning */
1042 GNUNET_TIME_absolute_get_difference (last_request,
1043 GNUNET_TIME_absolute_get ());
1044 request_rate = T_relative_avg (request_deltas, req_counter);
1046 /* Compute the duration a round will maximally take */
1047 max_round_duration =
1048 GNUNET_TIME_relative_add (round_interval,
1049 GNUNET_TIME_relative_divide (round_interval, 2));
1051 /* Set the estimated size the sampler has to have to
1052 * satisfy the current client request rate */
1053 sampler_size_client_need =
1054 max_round_duration.rel_value_us / request_rate.rel_value_us;
1056 /* Resize the sampler */
1057 client_resize_wrapper ();
1059 last_request = GNUNET_TIME_absolute_get ();
1064 * Add all peers in @a peer_array to @peer_map used as set.
1066 * @param peer_array array containing the peers
1067 * @param num_peers number of peers in @peer_array
1068 * @param peer_map the peermap to use as set
1071 add_peer_array_to_set (const struct GNUNET_PeerIdentity *peer_array,
1072 unsigned int num_peers,
1073 struct GNUNET_CONTAINER_MultiPeerMap *peer_map)
1076 if (NULL == peer_map)
1077 peer_map = GNUNET_CONTAINER_multipeermap_create (num_peers + 1,
1079 for (i = 0 ; i < num_peers ; i++)
1081 GNUNET_CONTAINER_multipeermap_put (peer_map,
1084 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1090 * Send a PULL REPLY to @a peer_id
1092 * @param peer_id the peer to send the reply to.
1093 * @param peer_ids the peers to send to @a peer_id
1094 * @param num_peer_ids the number of peers to send to @a peer_id
1097 send_pull_reply (const struct GNUNET_PeerIdentity *peer_id,
1098 const struct GNUNET_PeerIdentity *peer_ids,
1099 unsigned int num_peer_ids)
1102 struct GNUNET_MQ_Handle *mq;
1103 struct GNUNET_MQ_Envelope *ev;
1104 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
1106 /* Compute actual size */
1107 send_size = sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) +
1108 num_peer_ids * sizeof (struct GNUNET_PeerIdentity);
1110 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
1111 /* Compute number of peers to send
1112 * If too long, simply truncate */
1113 // TODO select random ones via permutation
1114 // or even better: do good protocol design
1116 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE -
1117 sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1118 sizeof (struct GNUNET_PeerIdentity);
1120 send_size = num_peer_ids;
1122 LOG (GNUNET_ERROR_TYPE_DEBUG,
1123 "PULL REQUEST from peer %s received, going to send %u peers\n",
1124 GNUNET_i2s (peer_id), send_size);
1126 mq = get_mq (peer_map, peer_id);
1128 ev = GNUNET_MQ_msg_extra (out_msg,
1129 send_size * sizeof (struct GNUNET_PeerIdentity),
1130 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
1131 out_msg->num_peers = htonl (send_size);
1132 memcpy (&out_msg[1], peer_ids,
1133 send_size * sizeof (struct GNUNET_PeerIdentity));
1135 GNUNET_MQ_send (mq, ev);
1139 /***********************************************************************
1141 ***********************************************************************/
1148 * Function called by NSE.
1150 * Updates sizes of sampler list and gossip list and adapt those lists
1154 nse_callback (void *cls, struct GNUNET_TIME_Absolute timestamp,
1155 double logestimate, double std_dev)
1158 //double scale; // TODO this might go gloabal/config
1160 LOG (GNUNET_ERROR_TYPE_DEBUG,
1161 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
1162 logestimate, std_dev, RPS_sampler_get_size (prot_sampler));
1164 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
1165 // GNUNET_NSE_log_estimate_to_n (logestimate);
1166 estimate = pow (estimate, 1.0 / 3);
1167 // TODO add if std_dev is a number
1168 // estimate += (std_dev * scale);
1169 if (2 < ceil (estimate))
1171 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
1172 sampler_size_est_need = estimate;
1174 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
1176 /* If the NSE has changed adapt the lists accordingly */
1177 resize_wrapper (prot_sampler, sampler_size_est_need);
1178 client_resize_wrapper ();
1183 * Callback called once the requested PeerIDs are ready.
1185 * Sends those to the requesting client.
1187 void client_respond (void *cls,
1188 struct GNUNET_PeerIdentity *peer_ids, uint32_t num_peers)
1190 struct GNUNET_MQ_Envelope *ev;
1191 struct GNUNET_RPS_CS_ReplyMessage *out_msg;
1192 struct ReplyCls *reply_cls = (struct ReplyCls *) cls;
1193 uint32_t size_needed;
1194 struct client_ctx *cli_ctx;
1196 LOG (GNUNET_ERROR_TYPE_DEBUG,
1197 "sampler returned %" PRIu32 " peers\n",
1200 size_needed = sizeof (struct GNUNET_RPS_CS_ReplyMessage) +
1201 num_peers * sizeof (struct GNUNET_PeerIdentity);
1203 GNUNET_assert (GNUNET_SERVER_MAX_MESSAGE_SIZE >= size_needed);
1205 ev = GNUNET_MQ_msg_extra (out_msg,
1206 num_peers * sizeof (struct GNUNET_PeerIdentity),
1207 GNUNET_MESSAGE_TYPE_RPS_CS_REPLY);
1208 out_msg->num_peers = htonl (num_peers);
1209 out_msg->id = htonl (reply_cls->id);
1211 memcpy (&out_msg[1],
1213 num_peers * sizeof (struct GNUNET_PeerIdentity));
1214 GNUNET_free (peer_ids);
1216 cli_ctx = GNUNET_SERVER_client_get_user_context (reply_cls->client, struct client_ctx);
1217 if (NULL == cli_ctx) {
1218 cli_ctx = GNUNET_new (struct client_ctx);
1219 cli_ctx->mq = GNUNET_MQ_queue_for_server_client (reply_cls->client);
1220 GNUNET_SERVER_client_set_user_context (reply_cls->client, cli_ctx);
1223 GNUNET_free (reply_cls);
1225 GNUNET_MQ_send (cli_ctx->mq, ev);
1230 * Handle RPS request from the client.
1232 * @param cls closure
1233 * @param client identification of the client
1234 * @param message the actual message
1237 handle_client_request (void *cls,
1238 struct GNUNET_SERVER_Client *client,
1239 const struct GNUNET_MessageHeader *message)
1241 struct GNUNET_RPS_CS_RequestMessage *msg;
1243 uint32_t size_needed;
1244 struct ReplyCls *reply_cls;
1247 msg = (struct GNUNET_RPS_CS_RequestMessage *) message;
1249 num_peers = ntohl (msg->num_peers);
1250 size_needed = sizeof (struct GNUNET_RPS_CS_RequestMessage) +
1251 num_peers * sizeof (struct GNUNET_PeerIdentity);
1253 if (GNUNET_SERVER_MAX_MESSAGE_SIZE < size_needed)
1255 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
1259 for (i = 0 ; i < num_peers ; i++)
1262 LOG (GNUNET_ERROR_TYPE_DEBUG,
1263 "Client requested %" PRIu32 " random peer(s).\n",
1266 reply_cls = GNUNET_new (struct ReplyCls);
1267 reply_cls->id = ntohl (msg->id);
1268 reply_cls->client = client;
1270 RPS_sampler_get_n_rand_peers (client_sampler,
1276 GNUNET_SERVER_receive_done (client,
1282 * Handle seed from the client.
1284 * @param cls closure
1285 * @param client identification of the client
1286 * @param message the actual message
1289 handle_client_seed (void *cls,
1290 struct GNUNET_SERVER_Client *client,
1291 const struct GNUNET_MessageHeader *message)
1293 struct GNUNET_RPS_CS_SeedMessage *in_msg;
1294 struct GNUNET_PeerIdentity *peers;
1298 if (sizeof (struct GNUNET_RPS_CS_SeedMessage) > ntohs (message->size))
1300 GNUNET_break_op (0);
1301 GNUNET_SERVER_receive_done (client,
1305 in_msg = (struct GNUNET_RPS_CS_SeedMessage *) message;
1306 num_peers = ntohl (in_msg->num_peers);
1307 peers = (struct GNUNET_PeerIdentity *) &in_msg[1];
1308 //peers = GNUNET_new_array (num_peers, struct GNUNET_PeerIdentity);
1309 //memcpy (peers, &in_msg[1], num_peers * sizeof (struct GNUNET_PeerIdentity));
1311 if ((ntohs (message->size) - sizeof (struct GNUNET_RPS_CS_SeedMessage)) /
1312 sizeof (struct GNUNET_PeerIdentity) != num_peers)
1314 GNUNET_break_op (0);
1315 GNUNET_SERVER_receive_done (client,
1319 LOG (GNUNET_ERROR_TYPE_DEBUG,
1320 "Client seeded peers:\n");
1321 print_peer_list (peers, num_peers);
1323 for (i = 0 ; i < num_peers ; i++)
1325 LOG (GNUNET_ERROR_TYPE_DEBUG,
1326 "Updating samplers with seed %" PRIu32 ": %s\n",
1328 GNUNET_i2s (&peers[i]));
1330 RPS_sampler_update (prot_sampler, &peers[i]);
1331 RPS_sampler_update (client_sampler, &peers[i]);
1334 //GNUNET_free (peers);
1336 GNUNET_SERVER_receive_done (client,
1342 * Handle a PUSH message from another peer.
1344 * Check the proof of work and store the PeerID
1345 * in the temporary list for pushed PeerIDs.
1347 * @param cls Closure
1348 * @param channel The channel the PUSH was received over
1349 * @param channel_ctx The context associated with this channel
1350 * @param msg The message header
1353 handle_peer_push (void *cls,
1354 struct GNUNET_CADET_Channel *channel,
1356 const struct GNUNET_MessageHeader *msg)
1358 const struct GNUNET_PeerIdentity *peer;
1360 // (check the proof of work)
1362 peer = (const struct GNUNET_PeerIdentity *)
1363 GNUNET_CADET_channel_get_info (channel, GNUNET_CADET_OPTION_PEER);
1364 // FIXME wait for cadet to change this function
1366 LOG (GNUNET_ERROR_TYPE_DEBUG, "PUSH received (%s)\n", GNUNET_i2s (peer));
1368 #ifdef ENABLE_MALICIOUS
1369 struct AttackedPeer *tmp_att_peer;
1371 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1372 memcpy (&tmp_att_peer->peer_id, peer, sizeof (struct GNUNET_PeerIdentity));
1374 { /* Try to maximise representation */
1375 if (NULL == att_peer_set)
1376 att_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
1377 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1380 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1383 add_peer_array_to_set (peer, 1, att_peer_set);
1389 else if (2 == mal_type)
1390 { /* We attack one single well-known peer - simply ignore */
1394 #endif /* ENABLE_MALICIOUS */
1396 /* Add the sending peer to the push_list */
1397 if (GNUNET_NO == in_arr (push_list, push_list_size, peer))
1398 GNUNET_array_append (push_list, push_list_size, *peer);
1405 * Handle PULL REQUEST request message from another peer.
1407 * Reply with the gossip list of PeerIDs.
1409 * @param cls Closure
1410 * @param channel The channel the PUSH was received over
1411 * @param channel_ctx The context associated with this channel
1412 * @param msg The message header
1415 handle_peer_pull_request (void *cls,
1416 struct GNUNET_CADET_Channel *channel,
1418 const struct GNUNET_MessageHeader *msg)
1420 struct GNUNET_PeerIdentity *peer;
1422 peer = (struct GNUNET_PeerIdentity *)
1423 GNUNET_CADET_channel_get_info (channel,
1424 GNUNET_CADET_OPTION_PEER);
1425 // FIXME wait for cadet to change this function
1427 #ifdef ENABLE_MALICIOUS
1429 { /* Try to maximise representation */
1430 send_pull_reply (peer, mal_peers, num_mal_peers);
1434 else if (2 == mal_type)
1435 { /* Try to partition network */
1436 if (GNUNET_YES == GNUNET_CRYPTO_cmp_peer_identity (&attacked_peer, peer))
1438 send_pull_reply (peer, mal_peers, num_mal_peers);
1442 #endif /* ENABLE_MALICIOUS */
1444 send_pull_reply (peer, gossip_list, gossip_list_size);
1451 * Handle PULL REPLY message from another peer.
1453 * Check whether we sent a corresponding request and
1454 * whether this reply is the first one.
1456 * @param cls Closure
1457 * @param channel The channel the PUSH was received over
1458 * @param channel_ctx The context associated with this channel
1459 * @param msg The message header
1462 handle_peer_pull_reply (void *cls,
1463 struct GNUNET_CADET_Channel *channel,
1465 const struct GNUNET_MessageHeader *msg)
1467 LOG (GNUNET_ERROR_TYPE_DEBUG, "PULL REPLY received\n");
1469 struct GNUNET_RPS_P2P_PullReplyMessage *in_msg;
1470 struct GNUNET_PeerIdentity *peers;
1471 struct PeerContext *peer_ctx;
1472 struct GNUNET_PeerIdentity *sender;
1473 struct PeerContext *sender_ctx;
1474 struct PeerOutstandingOp out_op;
1476 #ifdef ENABLE_MALICIOUS
1477 struct AttackedPeer *tmp_att_peer;
1478 #endif /* ENABLE_MALICIOUS */
1480 /* Check for protocol violation */
1481 if (sizeof (struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->size))
1483 GNUNET_break_op (0);
1484 return GNUNET_SYSERR;
1487 in_msg = (struct GNUNET_RPS_P2P_PullReplyMessage *) msg;
1488 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1489 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1491 LOG (GNUNET_ERROR_TYPE_ERROR,
1492 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1493 ntohl (in_msg->num_peers),
1494 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_P2P_PullReplyMessage)) /
1495 sizeof (struct GNUNET_PeerIdentity));
1496 GNUNET_break_op (0);
1497 return GNUNET_SYSERR;
1500 sender = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
1501 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
1502 // Guess simply casting isn't the nicest way...
1503 // FIXME wait for cadet to change this function
1504 sender_ctx = get_peer_ctx (peer_map, sender);
1506 if (GNUNET_YES == get_peer_flag (sender_ctx, PULL_REPLY_PENDING))
1508 GNUNET_break_op (0);
1513 #ifdef ENABLE_MALICIOUS
1514 // We shouldn't even receive pull replies as we're not sending
1517 #endif /* ENABLE_MALICIOUS */
1519 /* Do actual logic */
1520 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1522 for (i = 0 ; i < ntohl (in_msg->num_peers) ; i++)
1524 #ifdef ENABLE_MALICIOUS
1527 // TODO check if we sent a request and this was the first reply
1528 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
1530 && GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (mal_peer_set,
1532 && GNUNET_NO == GNUNET_CRYPTO_cmp_peer_identity (&peers[i],
1535 tmp_att_peer = GNUNET_new (struct AttackedPeer);
1536 tmp_att_peer->peer_id = peers[i];
1537 GNUNET_CONTAINER_DLL_insert (att_peers_head,
1540 add_peer_array_to_set (&peers[i], 1, att_peer_set);
1544 #endif /* ENABLE_MALICIOUS */
1545 peer_ctx = get_peer_ctx (peer_map, &peers[i]);
1546 if (GNUNET_YES == get_peer_flag (peer_ctx, VALID)
1547 || NULL != peer_ctx->send_channel
1548 || NULL != peer_ctx->recv_channel)
1550 if (GNUNET_NO == in_arr (pull_list, pull_list_size, &peers[i])
1551 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peers[i]))
1552 GNUNET_array_append (pull_list, pull_list_size, peers[i]);
1554 else if (GNUNET_NO == insert_in_pull_list_scheduled (peer_ctx))
1556 out_op.op = insert_in_pull_list;
1557 out_op.op_cls = NULL;
1558 GNUNET_array_append (peer_ctx->outstanding_ops,
1559 peer_ctx->num_outstanding_ops,
1561 check_peer_live (peer_ctx);
1565 unset_peer_flag (sender_ctx, PULL_REPLY_PENDING);
1566 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, sender);
1573 * Compute a random delay.
1574 * A uniformly distributed value between mean + spread and mean - spread.
1576 * For example for mean 4 min and spread 2 the minimum is (4 min - (1/2 * 4 min))
1577 * It would return a random value between 2 and 6 min.
1579 * @param mean the mean
1580 * @param spread the inverse amount of deviation from the mean
1582 static struct GNUNET_TIME_Relative
1583 compute_rand_delay (struct GNUNET_TIME_Relative mean, unsigned int spread)
1585 struct GNUNET_TIME_Relative half_interval;
1586 struct GNUNET_TIME_Relative ret;
1587 unsigned int rand_delay;
1588 unsigned int max_rand_delay;
1592 LOG (GNUNET_ERROR_TYPE_WARNING,
1593 "Not accepting spread of 0\n");
1597 /* Compute random time value between spread * mean and spread * mean */
1598 half_interval = GNUNET_TIME_relative_divide (mean, spread);
1600 max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us / mean.rel_value_us * (2/spread);
1602 * Compute random value between (0 and 1) * round_interval
1603 * via multiplying round_interval with a 'fraction' (0 to value)/value
1605 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, max_rand_delay);
1606 ret = GNUNET_TIME_relative_multiply (mean, rand_delay);
1607 ret = GNUNET_TIME_relative_divide (ret, max_rand_delay);
1608 ret = GNUNET_TIME_relative_add (ret, half_interval);
1610 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
1611 LOG (GNUNET_ERROR_TYPE_WARNING,
1612 "Returning FOREVER_REL\n");
1619 * Send single pull request
1621 * @param peer_id the peer to send the pull request to.
1624 send_pull_request (struct GNUNET_PeerIdentity *peer_id)
1626 struct GNUNET_MQ_Envelope *ev;
1627 struct GNUNET_MQ_Handle *mq;
1629 LOG (GNUNET_ERROR_TYPE_DEBUG,
1630 "Sending PULL request to peer %s of gossiped list.\n",
1631 GNUNET_i2s (peer_id));
1633 GNUNET_array_append (pending_pull_reply_list, pending_pull_reply_list_size, *peer_id);
1635 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
1636 mq = get_mq (peer_map, peer_id);
1637 GNUNET_MQ_send (mq, ev);
1644 * @param peer_id the peer to send the push to.
1647 send_push (struct GNUNET_PeerIdentity *peer_id)
1649 struct GNUNET_MQ_Envelope *ev;
1650 struct GNUNET_MQ_Handle *mq;
1652 LOG (GNUNET_ERROR_TYPE_DEBUG,
1653 "Sending PUSH to peer %s of gossiped list.\n",
1654 GNUNET_i2s (peer_id));
1656 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
1657 mq = get_mq (peer_map, peer_id);
1658 GNUNET_MQ_send (mq, ev);
1663 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1666 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1669 #ifdef ENABLE_MALICIOUS
1671 * Turn RPS service to act malicious.
1673 * @param cls Closure
1674 * @param channel The channel the PUSH was received over
1675 * @param channel_ctx The context associated with this channel
1676 * @param msg The message header
1679 handle_client_act_malicious (void *cls,
1680 struct GNUNET_SERVER_Client *client,
1681 const struct GNUNET_MessageHeader *msg)
1683 struct GNUNET_RPS_CS_ActMaliciousMessage *in_msg;
1684 struct GNUNET_PeerIdentity *peers;
1685 uint32_t num_mal_peers_sent;
1686 uint32_t num_mal_peers_old;
1688 /* Check for protocol violation */
1689 if (sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage) > ntohs (msg->size))
1691 GNUNET_break_op (0);
1694 in_msg = (struct GNUNET_RPS_CS_ActMaliciousMessage *) msg;
1695 if ((ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1696 sizeof (struct GNUNET_PeerIdentity) != ntohl (in_msg->num_peers))
1698 LOG (GNUNET_ERROR_TYPE_ERROR,
1699 "message says it sends %" PRIu64 " peers, have space for %i peers\n",
1700 ntohl (in_msg->num_peers),
1701 (ntohs (msg->size) - sizeof (struct GNUNET_RPS_CS_ActMaliciousMessage)) /
1702 sizeof (struct GNUNET_PeerIdentity));
1703 GNUNET_break_op (0);
1707 /* Do actual logic */
1708 // FIXME ingore own id
1709 peers = (struct GNUNET_PeerIdentity *) &msg[1];
1710 mal_type = ntohl (in_msg->type);
1712 LOG (GNUNET_ERROR_TYPE_DEBUG,
1713 "Now acting malicious type %" PRIu32 "\n",
1717 { /* Try to maximise representation */
1718 /* Add other malicious peers to those we already know */
1720 num_mal_peers_sent = ntohl (in_msg->num_peers);
1721 num_mal_peers_old = num_mal_peers;
1722 GNUNET_array_grow (mal_peers,
1724 num_mal_peers + num_mal_peers_sent);
1725 memcpy (&mal_peers[num_mal_peers_old],
1727 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1729 /* Add all mal peers to mal_peer_set */
1730 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1734 /* Substitute do_round () with do_mal_round () */
1735 GNUNET_SCHEDULER_cancel (do_round_task);
1736 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1739 else if (2 == mal_type)
1740 { /* Try to partition the network */
1741 /* Add other malicious peers to those we already know */
1742 num_mal_peers_sent = ntohl (in_msg->num_peers) - 1;
1743 num_mal_peers_old = num_mal_peers;
1744 GNUNET_array_grow (mal_peers,
1746 num_mal_peers + num_mal_peers_sent);
1747 memcpy (&mal_peers[num_mal_peers_old],
1749 num_mal_peers_sent * sizeof (struct GNUNET_PeerIdentity));
1751 /* Add all mal peers to mal_peer_set */
1752 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
1756 /* Store the one attacked peer */
1757 memcpy (&attacked_peer,
1758 &in_msg->attacked_peer,
1759 sizeof (struct GNUNET_PeerIdentity));
1761 LOG (GNUNET_ERROR_TYPE_DEBUG,
1762 "Attacked peer is %s\n",
1763 GNUNET_i2s (&attacked_peer));
1765 /* Substitute do_round () with do_mal_round () */
1766 GNUNET_SCHEDULER_cancel (do_round_task);
1767 do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, NULL);
1769 else if (0 == mal_type)
1770 { /* Stop acting malicious */
1772 if (NULL != mal_peers)
1773 GNUNET_free (mal_peers);
1775 /* Substitute do_mal_round () with do_round () */
1776 GNUNET_SCHEDULER_cancel (do_round_task);
1777 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
1787 * Send out PUSHes and PULLs maliciously.
1789 * This is executed regylary.
1792 do_mal_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1794 uint32_t num_pushes;
1796 struct GNUNET_TIME_Relative time_next_round;
1797 struct AttackedPeer *tmp_att_peer;
1799 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round maliciously.\n");
1801 /* Do malicious actions */
1803 { /* Try to maximise representation */
1805 /* The maximum of pushes we're going to send this round */
1806 num_pushes = min (min (push_limit,
1807 num_attacked_peers),
1808 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
1810 /* Send PUSHes to attacked peers */
1811 for (i = 0 ; i < num_pushes ; i++)
1813 if (att_peers_tail == att_peer_index)
1814 att_peer_index = att_peers_head;
1816 att_peer_index = att_peer_index->next;
1818 send_push (&att_peer_index->peer_id);
1821 /* Send PULLs to some peers to learn about additional peers to attack */
1822 for (i = 0 ; i < num_pushes * alpha ; i++)
1824 if (att_peers_tail == tmp_att_peer)
1825 tmp_att_peer = att_peers_head;
1827 att_peer_index = tmp_att_peer->next;
1829 send_pull_request (&tmp_att_peer->peer_id);
1834 else if (2 == mal_type)
1836 * Try to partition the network
1837 * Send as many pushes to the attacked peer as possible
1838 * That is one push per round as it will ignore more.
1840 send_push (&attacked_peer);
1844 /* Schedule next round */
1845 time_next_round = compute_rand_delay (round_interval, 2);
1847 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_mal_round, NULL);
1848 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round, &do_mal_round, NULL);
1849 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
1851 #endif /* ENABLE_MALICIOUS */
1855 * Send out PUSHes and PULLs, possibly update #gossip_list, samplers.
1857 * This is executed regylary.
1860 do_round (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1862 LOG (GNUNET_ERROR_TYPE_DEBUG, "Going to execute next round.\n");
1865 unsigned int *permut;
1866 unsigned int n_peers; /* Number of peers we send pushes/pulls to */
1867 struct GNUNET_PeerIdentity peer;
1868 struct GNUNET_PeerIdentity *tmp_peer;
1870 LOG (GNUNET_ERROR_TYPE_DEBUG,
1871 "Printing gossip list:\n");
1872 for (i = 0 ; i < gossip_list_size ; i++)
1873 LOG (GNUNET_ERROR_TYPE_DEBUG,
1874 "\t%s\n", GNUNET_i2s (&gossip_list[i]));
1875 // TODO log lists, ...
1877 /* Would it make sense to have one shuffeled gossip list and then
1878 * to send PUSHes to first alpha peers, PULL requests to next beta peers and
1879 * use the rest to update sampler?
1880 * in essence get random peers with consumption */
1883 if (0 < gossip_list_size)
1885 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
1886 (unsigned int) gossip_list_size);
1887 n_peers = ceil (alpha * gossip_list_size);
1888 LOG (GNUNET_ERROR_TYPE_DEBUG,
1889 "Going to send pushes to %u ceil (%f * %u) peers.\n",
1890 n_peers, alpha, gossip_list_size);
1891 for (i = 0 ; i < n_peers ; i++)
1893 peer = gossip_list[permut[i]];
1894 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer)) // TODO
1895 { // FIXME if this fails schedule/loop this for later
1899 GNUNET_free (permut);
1903 /* Send PULL requests */
1904 //permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG, (unsigned int) sampler_list->size);
1905 n_peers = ceil (beta * gossip_list_size);
1906 LOG (GNUNET_ERROR_TYPE_DEBUG,
1907 "Going to send pulls to %u ceil (%f * %u) peers.\n",
1908 n_peers, beta, gossip_list_size);
1909 for (i = 0 ; i < n_peers ; i++)
1911 tmp_peer = get_rand_peer_ignore_list (gossip_list, gossip_list_size,
1912 pending_pull_reply_list, pending_pull_reply_list_size);
1913 if (NULL != tmp_peer)
1916 GNUNET_free (tmp_peer);
1918 if (0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, &peer))
1920 send_pull_request (&peer);
1926 /* Update gossip list */
1928 if ( push_list_size <= alpha * gossip_list_size &&
1929 push_list_size != 0 &&
1930 pull_list_size != 0 )
1932 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the gossip list.\n");
1934 uint32_t first_border;
1935 uint32_t second_border;
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, gossip_list_size);
1943 memcpy (peers_to_clean,
1945 gossip_list_size * sizeof (struct GNUNET_PeerIdentity));
1947 first_border = ceil (alpha * sampler_size_est_need);
1948 second_border = first_border + ceil (beta * sampler_size_est_need);
1950 GNUNET_array_grow (gossip_list, gossip_list_size, second_border);
1952 for (i = 0 ; i < first_border ; i++)
1953 { // TODO use RPS_sampler_get_n_rand_peers
1954 /* Update gossip list with peers received through PUSHes */
1955 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1957 gossip_list[i] = push_list[r_index];
1958 // TODO change the peer_flags accordingly
1961 for (i = first_border ; i < second_border ; i++)
1963 /* Update gossip list with peers received through PULLs */
1964 r_index = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_STRONG,
1966 gossip_list[i] = pull_list[r_index];
1967 // TODO change the peer_flags accordingly
1970 for (i = second_border ; i < sampler_size_est_need ; i++)
1972 /* Update gossip list with peers from history */
1973 RPS_sampler_get_n_rand_peers (prot_sampler, hist_update, NULL, 1, GNUNET_NO);
1974 num_hist_update_tasks++;
1975 // TODO change the peer_flags accordingly
1978 for (i = 0 ; i < gossip_list_size ; i++)
1979 rem_from_list (&peers_to_clean, &peers_to_clean_size, &gossip_list[i]);
1981 for (i = 0 ; i < peers_to_clean_size ; i++)
1982 peer_clean (&peers_to_clean[i]);
1984 GNUNET_free (peers_to_clean);
1988 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the gossip list.\n");
1990 // TODO independent of that also get some peers from CADET_get_peers()?
1993 /* Update samplers */
1994 for ( i = 0 ; i < push_list_size ; i++ )
1996 LOG (GNUNET_ERROR_TYPE_DEBUG,
1997 "Updating with peer %s from push list\n",
1998 GNUNET_i2s (&push_list[i]));
1999 RPS_sampler_update (prot_sampler, &push_list[i]);
2000 RPS_sampler_update (client_sampler, &push_list[i]);
2001 // TODO set in_flag?
2004 for ( i = 0 ; i < pull_list_size ; i++ )
2006 LOG (GNUNET_ERROR_TYPE_DEBUG,
2007 "Updating with peer %s from pull list\n",
2008 GNUNET_i2s (&pull_list[i]));
2009 RPS_sampler_update (prot_sampler, &pull_list[i]);
2010 RPS_sampler_update (client_sampler, &pull_list[i]);
2011 // TODO set in_flag?
2015 /* Empty push/pull lists */
2016 GNUNET_array_grow (push_list, push_list_size, 0);
2017 GNUNET_array_grow (pull_list, pull_list_size, 0);
2019 struct GNUNET_TIME_Relative time_next_round;
2021 time_next_round = compute_rand_delay (round_interval, 2);
2023 /* Schedule next round */
2024 //do_round_task = GNUNET_SCHEDULER_add_delayed (round_interval, &do_round, NULL);
2025 do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round, &do_round, NULL);
2026 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
2031 rps_start (struct GNUNET_SERVER_Handle *server);
2035 * This is called from GNUNET_CADET_get_peers().
2037 * It is called on every peer(ID) that cadet somehow has contact with.
2038 * We use those to initialise the sampler.
2041 init_peer_cb (void *cls,
2042 const struct GNUNET_PeerIdentity *peer,
2043 int tunnel, // "Do we have a tunnel towards this peer?"
2044 unsigned int n_paths, // "Number of known paths towards this peer"
2045 unsigned int best_path) // "How long is the best path?
2046 // (0 = unknown, 1 = ourselves, 2 = neighbor)"
2048 struct PeerOutstandingOp out_op;
2049 struct PeerContext *peer_ctx;
2052 && 0 != GNUNET_CRYPTO_cmp_peer_identity (&own_identity, peer))
2054 LOG (GNUNET_ERROR_TYPE_DEBUG,
2055 "Got peer %s (at %p) from CADET (gossip_list_size: %u)\n",
2056 GNUNET_i2s (peer), peer, gossip_list_size);
2058 // maybe create a function for that
2059 peer_ctx = get_peer_ctx (peer_map, peer);
2060 if (GNUNET_YES != get_peer_flag (peer_ctx, VALID))
2062 if (GNUNET_NO == insert_in_sampler_scheduled (peer_ctx))
2064 out_op.op = insert_in_sampler;
2065 out_op.op_cls = NULL;
2066 GNUNET_array_append (peer_ctx->outstanding_ops,
2067 peer_ctx->num_outstanding_ops,
2071 if (GNUNET_NO == insert_in_gossip_list_scheduled (peer_ctx))
2073 out_op.op = insert_in_gossip_list;
2074 out_op.op_cls = NULL;
2075 GNUNET_array_append (peer_ctx->outstanding_ops,
2076 peer_ctx->num_outstanding_ops,
2080 /* Trigger livelyness test on peer */
2081 check_peer_live (peer_ctx);
2084 // send push/pull to each of those peers?
2090 * Clean the send channel of a peer
2093 peer_clean (const struct GNUNET_PeerIdentity *peer)
2095 struct PeerContext *peer_ctx;
2096 struct GNUNET_CADET_Channel *channel;
2098 if (GNUNET_YES != in_arr (gossip_list, gossip_list_size, peer)
2099 && GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
2101 peer_ctx = get_peer_ctx (peer_map, peer);
2102 if (NULL != peer_ctx->send_channel)
2104 channel = peer_ctx->send_channel;
2105 peer_ctx->send_channel = NULL;
2106 GNUNET_CADET_channel_destroy (channel);
2113 * Callback used to remove peers from the multipeermap.
2116 peer_remove_cb (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
2118 struct PeerContext *peer_ctx;
2119 const struct GNUNET_CADET_Channel *channel =
2120 (const struct GNUNET_CADET_Channel *) cls;
2121 struct GNUNET_CADET_Channel *recv;
2122 struct GNUNET_CADET_Channel *send;
2124 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, value))
2126 peer_ctx = (struct PeerContext *) value;
2128 if (0 != peer_ctx->num_outstanding_ops)
2129 GNUNET_array_grow (peer_ctx->outstanding_ops,
2130 peer_ctx->num_outstanding_ops,
2133 if (NULL != peer_ctx->mq)
2135 GNUNET_MQ_destroy (peer_ctx->mq);
2136 peer_ctx->mq = NULL;
2140 if (NULL != peer_ctx->is_live_task)
2142 LOG (GNUNET_ERROR_TYPE_DEBUG,
2143 "Trying to cancle is_live_task for peer %s\n",
2145 GNUNET_CADET_notify_transmit_ready_cancel (peer_ctx->is_live_task);
2146 peer_ctx->is_live_task = NULL;
2149 send = peer_ctx->send_channel;
2150 peer_ctx->send_channel = NULL;
2154 GNUNET_CADET_channel_destroy (send);
2157 recv = peer_ctx->send_channel;
2158 peer_ctx->recv_channel = NULL;
2162 GNUNET_CADET_channel_destroy (recv);
2165 if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove_all (peer_map, key))
2166 LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
2168 GNUNET_free (peer_ctx);
2176 * Task run during shutdown.
2182 shutdown_task (void *cls,
2183 const struct GNUNET_SCHEDULER_TaskContext *tc)
2186 LOG (GNUNET_ERROR_TYPE_DEBUG, "RPS is going down\n");
2188 if (NULL != do_round_task)
2190 GNUNET_SCHEDULER_cancel (do_round_task);
2191 do_round_task = NULL;
2196 if (GNUNET_SYSERR ==
2197 GNUNET_CONTAINER_multipeermap_iterate (peer_map, peer_remove_cb, NULL))
2198 LOG (GNUNET_ERROR_TYPE_WARNING,
2199 "Iterating over peers to disconnect from them was cancelled\n");
2202 GNUNET_NSE_disconnect (nse);
2203 GNUNET_CADET_disconnect (cadet_handle);
2204 RPS_sampler_destroy (prot_sampler);
2205 RPS_sampler_destroy (client_sampler);
2206 LOG (GNUNET_ERROR_TYPE_DEBUG,
2207 "Size of the peermap: %u\n",
2208 GNUNET_CONTAINER_multipeermap_size (peer_map));
2209 GNUNET_break (0 == GNUNET_CONTAINER_multipeermap_size (peer_map));
2210 GNUNET_CONTAINER_multipeermap_destroy (peer_map);
2211 GNUNET_array_grow (gossip_list, gossip_list_size, 0);
2212 GNUNET_array_grow (push_list, push_list_size, 0);
2213 GNUNET_array_grow (pull_list, pull_list_size, 0);
2214 #ifdef ENABLE_MALICIOUS
2215 struct AttackedPeer *tmp_att_peer;
2216 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
2217 if (NULL != mal_peer_set)
2218 GNUNET_CONTAINER_multipeermap_destroy (mal_peer_set);
2219 if (NULL != att_peer_set)
2220 GNUNET_CONTAINER_multipeermap_destroy (att_peer_set);
2221 while (NULL != att_peers_head)
2223 tmp_att_peer = att_peers_head;
2224 GNUNET_CONTAINER_DLL_remove (att_peers_head, att_peers_tail, tmp_att_peer);
2226 #endif /* ENABLE_MALICIOUS */
2231 * A client disconnected. Remove all of its data structure entries.
2233 * @param cls closure, NULL
2234 * @param client identification of the client
2237 handle_client_disconnect (void *cls,
2238 struct GNUNET_SERVER_Client * client)
2244 * Handle the channel a peer opens to us.
2246 * @param cls The closure
2247 * @param channel The channel the peer wants to establish
2248 * @param initiator The peer's peer ID
2249 * @param port The port the channel is being established over
2250 * @param options Further options
2253 handle_inbound_channel (void *cls,
2254 struct GNUNET_CADET_Channel *channel,
2255 const struct GNUNET_PeerIdentity *initiator,
2257 enum GNUNET_CADET_ChannelOption options)
2259 struct PeerContext *peer_ctx;
2260 struct GNUNET_PeerIdentity peer;
2263 LOG (GNUNET_ERROR_TYPE_DEBUG,
2264 "New channel was established to us (Peer %s).\n",
2265 GNUNET_i2s (&peer));
2267 GNUNET_assert (NULL != channel);
2269 // we might not even store the recv_channel
2271 peer_ctx = get_peer_ctx (peer_map, &peer);
2272 // FIXME what do we do if a channel is established twice?
2273 // overwrite? Clean old channel? ...?
2274 //if (NULL != peer_ctx->recv_channel)
2276 // peer_ctx->recv_channel = channel;
2278 peer_ctx->recv_channel = channel;
2280 (void) GNUNET_CONTAINER_multipeermap_put (peer_map, &peer, peer_ctx,
2281 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
2283 peer_is_live (peer_ctx);
2285 return NULL; // TODO
2290 * This is called when a remote peer destroys a channel.
2292 * @param cls The closure
2293 * @param channel The channel being closed
2294 * @param channel_ctx The context associated with this channel
2297 cleanup_channel (void *cls,
2298 const struct GNUNET_CADET_Channel *channel,
2301 struct GNUNET_PeerIdentity *peer;
2302 struct PeerContext *peer_ctx;
2304 peer = (struct GNUNET_PeerIdentity *) GNUNET_CADET_channel_get_info (
2305 (struct GNUNET_CADET_Channel *) channel, GNUNET_CADET_OPTION_PEER);
2306 // Guess simply casting isn't the nicest way...
2307 // FIXME wait for cadet to change this function
2309 if (GNUNET_YES == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
2311 peer_ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
2313 if (NULL == peer_ctx) /* It could have been removed by shutdown_task */
2316 if (channel == peer_ctx->send_channel)
2317 { /* Peer probably went down */
2318 LOG (GNUNET_ERROR_TYPE_DEBUG,
2319 "Peer %s destroyed send channel - probably went down, cleaning up\n",
2321 rem_from_list (&gossip_list, &gossip_list_size, peer);
2322 rem_from_list (&pending_pull_reply_list, &pending_pull_reply_list_size, peer);
2324 peer_ctx->send_channel = NULL;
2325 /* Somwewhat {ab,re}use the iterator function */
2326 /* Cast to void is ok, because it's used as void in peer_remove_cb */
2327 (void) peer_remove_cb ((void *) channel, peer, peer_ctx);
2329 else if (channel == peer_ctx->recv_channel)
2330 { /* Other peer doesn't want to send us messages anymore */
2331 LOG (GNUNET_ERROR_TYPE_DEBUG,
2332 "Peer %s destroyed recv channel - cleaning up channel\n",
2334 peer_ctx->recv_channel = NULL;
2341 * Actually start the service.
2344 rps_start (struct GNUNET_SERVER_Handle *server)
2346 static const struct GNUNET_SERVER_MessageHandler handlers[] = {
2347 {&handle_client_request, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_REQUEST,
2348 sizeof (struct GNUNET_RPS_CS_RequestMessage)},
2349 {&handle_client_seed, NULL, GNUNET_MESSAGE_TYPE_RPS_CS_SEED, 0},
2350 #ifdef ENABLE_MALICIOUS
2351 {&handle_client_act_malicious, NULL, GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS , 0},
2352 #endif /* ENABLE_MALICIOUS */
2356 GNUNET_SERVER_add_handlers (server, handlers);
2357 GNUNET_SERVER_disconnect_notify (server,
2358 &handle_client_disconnect,
2360 LOG (GNUNET_ERROR_TYPE_DEBUG, "Ready to receive requests from clients\n");
2363 do_round_task = GNUNET_SCHEDULER_add_now (&do_round, NULL);
2364 LOG (GNUNET_ERROR_TYPE_DEBUG, "Scheduled first round\n");
2366 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
2373 * Process statistics requests.
2375 * @param cls closure
2376 * @param server the initialized server
2377 * @param c configuration to use
2381 struct GNUNET_SERVER_Handle *server,
2382 const struct GNUNET_CONFIGURATION_Handle *c)
2384 // TODO check what this does -- copied from gnunet-boss
2385 // - seems to work as expected
2386 GNUNET_log_setup ("rps", GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG), NULL);
2391 GNUNET_CRYPTO_get_peer_identity (cfg, &own_identity); // TODO check return value
2392 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2393 "STARTING SERVICE (rps) for peer [%s]\n",
2394 GNUNET_i2s (&own_identity));
2395 #ifdef ENABLE_MALICIOUS
2396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2397 "Malicious execution compiled in.\n");
2398 #endif /* ENABLE_MALICIOUS */
2402 /* Get time interval from the configuration */
2403 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_time (cfg, "RPS",
2407 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read ROUNDINTERVAL from config\n");
2408 GNUNET_SCHEDULER_shutdown ();
2412 /* Get initial size of sampler/gossip list from the configuration */
2413 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (cfg, "RPS",
2415 (long long unsigned int *) &sampler_size_est_need))
2417 LOG (GNUNET_ERROR_TYPE_DEBUG, "Failed to read INITSIZE from config\n");
2418 GNUNET_SCHEDULER_shutdown ();
2421 LOG (GNUNET_ERROR_TYPE_DEBUG, "INITSIZE is %" PRIu64 "\n", sampler_size_est_need);
2427 /* connect to NSE */
2428 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
2429 // TODO check whether that was successful
2430 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to NSE\n");
2436 peer_map = GNUNET_CONTAINER_multipeermap_create (sampler_size_est_need, GNUNET_NO);
2439 /* Initialise cadet */
2440 static const struct GNUNET_CADET_MessageHandler cadet_handlers[] = {
2441 {&handle_peer_push , GNUNET_MESSAGE_TYPE_RPS_PP_PUSH ,
2442 sizeof (struct GNUNET_MessageHeader)},
2443 {&handle_peer_pull_request, GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2444 sizeof (struct GNUNET_MessageHeader)},
2445 {&handle_peer_pull_reply , GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY , 0},
2449 const uint32_t ports[] = {GNUNET_RPS_CADET_PORT, 0}; // _PORT specified in src/rps/rps.h
2450 cadet_handle = GNUNET_CADET_connect (cfg,
2452 &handle_inbound_channel,
2456 LOG (GNUNET_ERROR_TYPE_DEBUG, "Connected to CADET\n");
2459 /* Initialise sampler */
2460 struct GNUNET_TIME_Relative half_round_interval;
2461 struct GNUNET_TIME_Relative max_round_interval;
2463 half_round_interval = GNUNET_TIME_relative_multiply (round_interval, .5);
2464 max_round_interval = GNUNET_TIME_relative_add (round_interval, half_round_interval);
2466 prot_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2467 client_sampler = RPS_sampler_init (sampler_size_est_need, max_round_interval);
2469 /* Initialise push and pull maps */
2474 pending_pull_reply_list = NULL;
2475 pending_pull_reply_list_size = 0;
2478 num_hist_update_tasks = 0;
2481 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
2482 GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, NULL);
2483 // TODO send push/pull to each of those peers?
2491 * The main function for the rps service.
2493 * @param argc number of arguments from the command line
2494 * @param argv command line arguments
2495 * @return 0 ok, 1 on error
2498 main (int argc, char *const *argv)
2500 return (GNUNET_OK ==
2501 GNUNET_SERVICE_run (argc,
2504 GNUNET_SERVICE_OPTION_NONE,
2505 &run, NULL)) ? 0 : 1;
2508 /* end of gnunet-service-rps.c */