2 This file is part of GNUnet.
3 Copyright (C) 2013-2015 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Affero General Public License for more details.
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
18 SPDX-License-Identifier: AGPL3.0-or-later
22 * @file rps/gnunet-service-rps.c
23 * @brief rps service implementation
24 * @author Julius Bünger
27 #include "gnunet_applications.h"
28 #include "gnunet_util_lib.h"
29 #include "gnunet_cadet_service.h"
30 #include "gnunet_core_service.h"
31 #include "gnunet_peerinfo_service.h"
32 #include "gnunet_nse_service.h"
33 #include "gnunet_statistics_service.h"
35 #include "rps-test_util.h"
36 #include "gnunet-service-rps_sampler.h"
37 #include "gnunet-service-rps_custommap.h"
38 #include "gnunet-service-rps_view.h"
44 #define LOG(kind, ...) GNUNET_log (kind, __VA_ARGS__)
46 // TODO check for overflows
48 // TODO align message structs
50 // TODO connect to friends
52 // TODO blacklist? (-> mal peer detection on top of brahms)
54 // hist_size_init, hist_size_max
56 /***********************************************************************
57 * Old gnunet-service-rps_peers.c
58 ***********************************************************************/
61 * Set a peer flag of given peer context.
63 #define SET_PEER_FLAG(peer_ctx, mask) ((peer_ctx->peer_flags) |= (mask))
66 * Get peer flag of given peer context.
68 #define check_peer_flag_set(peer_ctx, mask) \
69 ((peer_ctx->peer_flags) & (mask) ? GNUNET_YES : GNUNET_NO)
72 * Unset flag of given peer context.
74 #define UNSET_PEER_FLAG(peer_ctx, mask) ((peer_ctx->peer_flags) &= ~(mask))
77 * Get channel flag of given channel context.
79 #define check_channel_flag_set(channel_flags, mask) \
80 ((*channel_flags) & (mask) ? GNUNET_YES : GNUNET_NO)
83 * Unset flag of given channel context.
85 #define unset_channel_flag(channel_flags, mask) ((*channel_flags) &= ~(mask))
90 * Pending operation on peer consisting of callback and closure
92 * When an operation cannot be executed right now this struct is used to store
93 * the callback and closure for later execution.
109 * List containing all messages that are yet to be send
111 * This is used to keep track of all messages that have not been sent yet. When
112 * a peer is to be removed the pending messages can be removed properly.
114 struct PendingMessage
119 struct PendingMessage *next;
120 struct PendingMessage *prev;
123 * The envelope to the corresponding message
125 struct GNUNET_MQ_Envelope *ev;
128 * The corresponding context
130 struct PeerContext *peer_ctx;
139 * @brief Context for a channel
144 * Struct used to keep track of other peer's status
146 * This is stored in a multipeermap.
147 * It contains information such as cadet channels, a message queue for sending,
148 * status about the channels, the pending operations on this peer and some flags
149 * about the status of the peer itself. (online, valid, ...)
154 * The Sub this context belongs to.
159 * Message queue open to client
161 struct GNUNET_MQ_Handle *mq;
164 * Channel open to client.
166 struct ChannelCtx *send_channel_ctx;
169 * Channel open from client.
171 struct ChannelCtx *recv_channel_ctx;
174 * Array of pending operations on this peer.
176 struct PeerPendingOp *pending_ops;
179 * Handle to the callback given to cadet_ntfy_tmt_rdy()
181 * To be canceled on shutdown.
183 struct PendingMessage *online_check_pending;
186 * Number of pending operations.
188 unsigned int num_pending_ops;
191 * Identity of the peer
193 struct GNUNET_PeerIdentity peer_id;
196 * Flags indicating status of peer
201 * Last time we received something from that peer.
203 struct GNUNET_TIME_Absolute last_message_recv;
206 * Last time we received a keepalive message.
208 struct GNUNET_TIME_Absolute last_keepalive;
211 * DLL with all messages that are yet to be sent
213 struct PendingMessage *pending_messages_head;
214 struct PendingMessage *pending_messages_tail;
217 * This is pobably followed by 'statistical' data (when we first saw
218 * it, how did we get its ID, how many pushes (in a timeinterval),
221 uint32_t round_pull_req;
225 * @brief Closure to #valid_peer_iterator
227 struct PeersIteratorCls
232 PeersIterator iterator;
235 * Closure to iterator
241 * @brief Context for a channel
246 * @brief The channel itself
248 struct GNUNET_CADET_Channel *channel;
251 * @brief The peer context associated with the channel
253 struct PeerContext *peer_ctx;
256 * @brief When channel destruction needs to be delayed (because it is called
257 * from within the cadet routine of another channel destruction) this task
258 * refers to the respective _SCHEDULER_Task.
260 struct GNUNET_SCHEDULER_Task *destruction_task;
267 * If type is 2 This struct is used to store the attacked peers in a DLL
274 struct AttackedPeer *next;
275 struct AttackedPeer *prev;
280 struct GNUNET_PeerIdentity peer_id;
283 #endif /* ENABLE_MALICIOUS */
286 * @brief This number determines the number of slots for files that represent
289 #define HISTOGRAM_FILE_SLOTS 32
292 * @brief The size (in bytes) a file needs to store the histogram
294 * Per slot: 1 newline, up to 4 chars,
295 * Additionally: 1 null termination
297 #define SIZE_DUMP_FILE (HISTOGRAM_FILE_SLOTS * 5) + 1
302 * Essentially one instance of brahms that only connects to other instances
303 * with the same (secret) value.
308 * @brief Hash of the shared value that defines Subs.
310 struct GNUNET_HashCode hash;
313 * @brief Port to communicate to other peers.
315 struct GNUNET_CADET_Port *cadet_port;
318 * @brief Hashmap of valid peers.
320 struct GNUNET_CONTAINER_MultiPeerMap *valid_peers;
323 * @brief Filename of the file that stores the valid peers persistently.
325 char *filename_valid_peers;
328 * Set of all peers to keep track of them.
330 struct GNUNET_CONTAINER_MultiPeerMap *peer_map;
333 * @brief This is the minimum estimate used as sampler size.
335 * It is configured by the user.
337 unsigned int sampler_size_est_min;
340 * The size of sampler we need to be able to satisfy the Brahms protocol's
341 * need of random peers.
343 * This is one minimum size the sampler grows to.
345 unsigned int sampler_size_est_need;
348 * Time interval the do_round task runs in.
350 struct GNUNET_TIME_Relative round_interval;
353 * Sampler used for the Brahms protocol itself.
355 struct RPS_Sampler *sampler;
359 * Name to log view to
361 char *file_name_view_log;
362 #endif /* TO_FILE_FULL */
367 * Name to log number of observed peers to
369 char *file_name_observed_log;
370 #endif /* TO_FILE_FULL */
373 * @brief Count the observed peers
375 uint32_t num_observed_peers;
378 * @brief Multipeermap (ab-) used to count unique peer_ids
380 struct GNUNET_CONTAINER_MultiPeerMap *observed_unique_peers;
384 * List to store peers received through pushes temporary.
386 struct CustomPeerMap *push_map;
389 * List to store peers received through pulls temporary.
391 struct CustomPeerMap *pull_map;
394 * @brief This is the estimate used as view size.
396 * It is initialised with the minimum
398 unsigned int view_size_est_need;
401 * @brief This is the minimum estimate used as view size.
403 * It is configured by the user.
405 unsigned int view_size_est_min;
413 * Identifier for the main task that runs periodically.
415 struct GNUNET_SCHEDULER_Task *do_round_task;
420 * @brief Counts the executed rounds.
425 * @brief This array accumulates the number of received pushes per round.
427 * Number at index i represents the number of rounds with i observed pushes.
429 uint32_t push_recv[HISTOGRAM_FILE_SLOTS];
432 * @brief Histogram of deltas between the expected and actual number of
435 * As half of the entries are expected to be negative, this is shifted by
436 * #HISTOGRAM_FILE_SLOTS/2.
438 uint32_t push_delta[HISTOGRAM_FILE_SLOTS];
441 * @brief Number of pull replies with this delay measured in rounds.
443 * Number at index i represents the number of pull replies with a delay of i
446 uint32_t pull_delays[HISTOGRAM_FILE_SLOTS];
450 /***********************************************************************
452 ***********************************************************************/
457 static const struct GNUNET_CONFIGURATION_Handle *cfg;
460 * Handle to the statistics service.
462 struct GNUNET_STATISTICS_Handle *stats;
467 struct GNUNET_CADET_Handle *cadet_handle;
472 struct GNUNET_CORE_Handle *core_handle;
475 * @brief PeerMap to keep track of connected peers.
477 struct GNUNET_CONTAINER_MultiPeerMap *map_single_hop;
482 static struct GNUNET_PeerIdentity own_identity;
485 * Percentage of total peer number in the view
486 * to send random PUSHes to
491 * Percentage of total peer number in the view
492 * to send random PULLs to
499 static struct GNUNET_NSE_Handle *nse;
502 * Handler to PEERINFO.
504 static struct GNUNET_PEERINFO_Handle *peerinfo_handle;
507 * Handle for cancellation of iteration over peers.
509 static struct GNUNET_PEERINFO_NotifyContext *peerinfo_notify_handle;
514 * Type of malicious peer
516 * 0 Don't act malicious at all - Default
517 * 1 Try to maximise representation
518 * 2 Try to partition the network
521 static uint32_t mal_type;
524 * Other malicious peers
526 static struct GNUNET_PeerIdentity *mal_peers;
529 * Hashmap of malicious peers used as set.
530 * Used to more efficiently check whether we know that peer.
532 static struct GNUNET_CONTAINER_MultiPeerMap *mal_peer_set;
535 * Number of other malicious peers
537 static uint32_t num_mal_peers;
541 * If type is 2 this is the DLL of attacked peers
543 static struct AttackedPeer *att_peers_head;
544 static struct AttackedPeer *att_peers_tail;
547 * This index is used to point to an attacked peer to
548 * implement the round-robin-ish way to select attacked peers.
550 static struct AttackedPeer *att_peer_index;
553 * Hashmap of attacked peers used as set.
554 * Used to more efficiently check whether we know that peer.
556 static struct GNUNET_CONTAINER_MultiPeerMap *att_peer_set;
559 * Number of attacked peers
561 static uint32_t num_attacked_peers;
564 * If type is 1 this is the attacked peer
566 static struct GNUNET_PeerIdentity attacked_peer;
569 * The limit of PUSHes we can send in one round.
570 * This is an assumption of the Brahms protocol and either implemented
573 * assumend to be the bandwidth limitation.
575 static uint32_t push_limit = 10000;
576 #endif /* ENABLE_MALICIOUS */
581 * This is run in any case by all peers and connects to all peers without
582 * specifying a shared value.
584 static struct Sub *msub;
587 * @brief Maximum number of valid peers to keep.
588 * TODO read from config
590 static const uint32_t num_valid_peers_max = UINT32_MAX;
592 /***********************************************************************
594 ***********************************************************************/
598 do_round (void *cls);
601 do_mal_round (void *cls);
605 * @brief Get the #PeerContext associated with a peer
607 * @param peer_map The peer map containing the context
608 * @param peer the peer id
610 * @return the #PeerContext
612 static struct PeerContext *
613 get_peer_ctx (const struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
614 const struct GNUNET_PeerIdentity *peer)
616 struct PeerContext *ctx;
619 ret = GNUNET_CONTAINER_multipeermap_contains (peer_map, peer);
620 GNUNET_assert (GNUNET_YES == ret);
621 ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
622 GNUNET_assert (NULL != ctx);
627 * @brief Check whether we have information about the given peer.
629 * FIXME probably deprecated. Make this the new _online.
631 * @param peer_map The peer map to check for the existence of @a peer
632 * @param peer peer in question
634 * @return #GNUNET_YES if peer is known
635 * #GNUNET_NO if peer is not knwon
638 check_peer_known (const struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
639 const struct GNUNET_PeerIdentity *peer)
641 if (NULL != peer_map)
643 return GNUNET_CONTAINER_multipeermap_contains (peer_map, peer);
653 * @brief Create a new #PeerContext and insert it into the peer map
655 * @param sub The Sub this context belongs to.
656 * @param peer the peer to create the #PeerContext for
658 * @return the #PeerContext
660 static struct PeerContext *
661 create_peer_ctx (struct Sub *sub,
662 const struct GNUNET_PeerIdentity *peer)
664 struct PeerContext *ctx;
667 GNUNET_assert (GNUNET_NO == check_peer_known (sub->peer_map, peer));
669 ctx = GNUNET_new (struct PeerContext);
670 ctx->peer_id = *peer;
672 ret = GNUNET_CONTAINER_multipeermap_put (sub->peer_map, peer, ctx,
673 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
674 GNUNET_assert (GNUNET_OK == ret);
677 GNUNET_STATISTICS_set (stats,
679 GNUNET_CONTAINER_multipeermap_size (sub->peer_map),
687 * @brief Create or get a #PeerContext
689 * @param sub The Sub to which the created context belongs to
690 * @param peer the peer to get the associated context to
692 * @return the context
694 static struct PeerContext *
695 create_or_get_peer_ctx (struct Sub *sub,
696 const struct GNUNET_PeerIdentity *peer)
698 if (GNUNET_NO == check_peer_known (sub->peer_map, peer))
700 return create_peer_ctx (sub, peer);
702 return get_peer_ctx (sub->peer_map, peer);
707 * @brief Check whether we have a connection to this @a peer
709 * Also sets the #Peers_ONLINE flag accordingly
711 * @param peer_ctx Context of the peer of which connectivity is to be checked
713 * @return #GNUNET_YES if we are connected
714 * #GNUNET_NO otherwise
717 check_connected (struct PeerContext *peer_ctx)
719 /* If we don't know about this peer we don't know whether it's online */
720 if (GNUNET_NO == check_peer_known (peer_ctx->sub->peer_map,
725 /* Get the context */
726 peer_ctx = get_peer_ctx (peer_ctx->sub->peer_map, &peer_ctx->peer_id);
727 /* If we have no channel to this peer we don't know whether it's online */
728 if ((NULL == peer_ctx->send_channel_ctx) &&
729 (NULL == peer_ctx->recv_channel_ctx))
731 UNSET_PEER_FLAG (peer_ctx, Peers_ONLINE);
734 /* Otherwise (if we have a channel, we know that it's online */
735 SET_PEER_FLAG (peer_ctx, Peers_ONLINE);
741 * @brief The closure to #get_rand_peer_iterator.
743 struct GetRandPeerIteratorCls
746 * @brief The index of the peer to return.
747 * Will be decreased until 0.
748 * Then current peer is returned.
753 * @brief Pointer to peer to return.
755 const struct GNUNET_PeerIdentity *peer;
760 * @brief Iterator function for #get_random_peer_from_peermap.
762 * Implements #GNUNET_CONTAINER_PeerMapIterator.
763 * Decreases the index until the index is null.
764 * Then returns the current peer.
766 * @param cls the #GetRandPeerIteratorCls containing index and peer
767 * @param peer current peer
768 * @param value unused
770 * @return #GNUNET_YES if we should continue to
775 get_rand_peer_iterator (void *cls,
776 const struct GNUNET_PeerIdentity *peer,
779 struct GetRandPeerIteratorCls *iterator_cls = cls;
783 if (0 >= iterator_cls->index)
785 iterator_cls->peer = peer;
788 iterator_cls->index--;
794 * @brief Get a random peer from @a peer_map
796 * @param valid_peers Peer map containing valid peers from which to select a
799 * @return a random peer
801 static const struct GNUNET_PeerIdentity *
802 get_random_peer_from_peermap (struct GNUNET_CONTAINER_MultiPeerMap *valid_peers)
804 struct GetRandPeerIteratorCls *iterator_cls;
805 const struct GNUNET_PeerIdentity *ret;
807 iterator_cls = GNUNET_new (struct GetRandPeerIteratorCls);
808 iterator_cls->index = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
809 GNUNET_CONTAINER_multipeermap_size (
811 (void) GNUNET_CONTAINER_multipeermap_iterate (valid_peers,
812 get_rand_peer_iterator,
814 ret = iterator_cls->peer;
815 GNUNET_free (iterator_cls);
821 * @brief Add a given @a peer to valid peers.
823 * If valid peers are already #num_valid_peers_max, delete a peer previously.
825 * @param peer The peer that is added to the valid peers.
826 * @param valid_peers Peer map of valid peers to which to add the @a peer
828 * @return #GNUNET_YES if no other peer had to be removed
829 * #GNUNET_NO otherwise
832 add_valid_peer (const struct GNUNET_PeerIdentity *peer,
833 struct GNUNET_CONTAINER_MultiPeerMap *valid_peers)
835 const struct GNUNET_PeerIdentity *rand_peer;
839 /* Remove random peers until there is space for a new one */
840 while (num_valid_peers_max <=
841 GNUNET_CONTAINER_multipeermap_size (valid_peers))
843 rand_peer = get_random_peer_from_peermap (valid_peers);
844 GNUNET_CONTAINER_multipeermap_remove_all (valid_peers, rand_peer);
847 (void) GNUNET_CONTAINER_multipeermap_put (valid_peers, peer, NULL,
848 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
849 if (valid_peers == msub->valid_peers)
851 GNUNET_STATISTICS_set (stats,
853 GNUNET_CONTAINER_multipeermap_size (valid_peers),
860 remove_pending_message (struct PendingMessage *pending_msg, int cancel);
863 * @brief Set the peer flag to living and
864 * call the pending operations on this peer.
866 * Also adds peer to #valid_peers.
868 * @param peer_ctx the #PeerContext of the peer to set online
871 set_peer_online (struct PeerContext *peer_ctx)
873 struct GNUNET_PeerIdentity *peer;
876 peer = &peer_ctx->peer_id;
877 LOG (GNUNET_ERROR_TYPE_DEBUG,
878 "Peer %s is online and valid, calling %i pending operations on it\n",
880 peer_ctx->num_pending_ops);
882 if (NULL != peer_ctx->online_check_pending)
884 LOG (GNUNET_ERROR_TYPE_DEBUG,
885 "Removing pending online check for peer %s\n",
886 GNUNET_i2s (&peer_ctx->peer_id));
887 // TODO wait until cadet sets mq->cancel_impl
888 // GNUNET_MQ_send_cancel (peer_ctx->online_check_pending->ev);
889 remove_pending_message (peer_ctx->online_check_pending, GNUNET_YES);
890 peer_ctx->online_check_pending = NULL;
893 SET_PEER_FLAG (peer_ctx, Peers_ONLINE);
895 /* Call pending operations */
896 for (i = 0; i < peer_ctx->num_pending_ops; i++)
898 peer_ctx->pending_ops[i].op (peer_ctx->pending_ops[i].op_cls, peer);
900 GNUNET_array_grow (peer_ctx->pending_ops, peer_ctx->num_pending_ops, 0);
904 cleanup_destroyed_channel (void *cls,
905 const struct GNUNET_CADET_Channel *channel);
907 /* Declaration of handlers */
909 handle_peer_check (void *cls,
910 const struct GNUNET_MessageHeader *msg);
913 handle_peer_push (void *cls,
914 const struct GNUNET_MessageHeader *msg);
917 handle_peer_pull_request (void *cls,
918 const struct GNUNET_MessageHeader *msg);
921 check_peer_pull_reply (void *cls,
922 const struct GNUNET_RPS_P2P_PullReplyMessage *msg);
925 handle_peer_pull_reply (void *cls,
926 const struct GNUNET_RPS_P2P_PullReplyMessage *msg);
928 /* End declaration of handlers */
931 * @brief Allocate memory for a new channel context and insert it into DLL
933 * @param peer_ctx context of the according peer
935 * @return The channel context
937 static struct ChannelCtx *
938 add_channel_ctx (struct PeerContext *peer_ctx)
940 struct ChannelCtx *channel_ctx;
942 channel_ctx = GNUNET_new (struct ChannelCtx);
943 channel_ctx->peer_ctx = peer_ctx;
949 * @brief Free memory and NULL pointers.
951 * @param channel_ctx The channel context.
954 remove_channel_ctx (struct ChannelCtx *channel_ctx)
956 struct PeerContext *peer_ctx = channel_ctx->peer_ctx;
958 if (NULL != channel_ctx->destruction_task)
960 GNUNET_SCHEDULER_cancel (channel_ctx->destruction_task);
961 channel_ctx->destruction_task = NULL;
964 GNUNET_free (channel_ctx);
966 if (NULL == peer_ctx)
968 if (channel_ctx == peer_ctx->send_channel_ctx)
970 peer_ctx->send_channel_ctx = NULL;
973 else if (channel_ctx == peer_ctx->recv_channel_ctx)
975 peer_ctx->recv_channel_ctx = NULL;
981 * @brief Get the channel of a peer. If not existing, create.
983 * @param peer_ctx Context of the peer of which to get the channel
984 * @return the #GNUNET_CADET_Channel used to send data to @a peer_ctx
986 struct GNUNET_CADET_Channel *
987 get_channel (struct PeerContext *peer_ctx)
989 /* There exists a copy-paste-clone in run() */
990 struct GNUNET_MQ_MessageHandler cadet_handlers[] = {
991 GNUNET_MQ_hd_fixed_size (peer_check,
992 GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE,
993 struct GNUNET_MessageHeader,
995 GNUNET_MQ_hd_fixed_size (peer_push,
996 GNUNET_MESSAGE_TYPE_RPS_PP_PUSH,
997 struct GNUNET_MessageHeader,
999 GNUNET_MQ_hd_fixed_size (peer_pull_request,
1000 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
1001 struct GNUNET_MessageHeader,
1003 GNUNET_MQ_hd_var_size (peer_pull_reply,
1004 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY,
1005 struct GNUNET_RPS_P2P_PullReplyMessage,
1007 GNUNET_MQ_handler_end ()
1011 if (NULL == peer_ctx->send_channel_ctx)
1013 LOG (GNUNET_ERROR_TYPE_DEBUG,
1014 "Trying to establish channel to peer %s\n",
1015 GNUNET_i2s (&peer_ctx->peer_id));
1016 peer_ctx->send_channel_ctx = add_channel_ctx (peer_ctx);
1017 peer_ctx->send_channel_ctx->channel =
1018 GNUNET_CADET_channel_create (cadet_handle,
1019 peer_ctx->send_channel_ctx, /* context */
1021 &peer_ctx->sub->hash,
1022 NULL, /* WindowSize handler */
1023 &cleanup_destroyed_channel, /* Disconnect handler */
1026 GNUNET_assert (NULL != peer_ctx->send_channel_ctx);
1027 GNUNET_assert (NULL != peer_ctx->send_channel_ctx->channel);
1028 return peer_ctx->send_channel_ctx->channel;
1033 * Get the message queue (#GNUNET_MQ_Handle) of a specific peer.
1035 * If we already have a message queue open to this client,
1036 * simply return it, otherways create one.
1038 * @param peer_ctx Context of the peer of whicht to get the mq
1039 * @return the #GNUNET_MQ_Handle
1041 static struct GNUNET_MQ_Handle *
1042 get_mq (struct PeerContext *peer_ctx)
1044 if (NULL == peer_ctx->mq)
1046 peer_ctx->mq = GNUNET_CADET_get_mq (get_channel (peer_ctx));
1048 return peer_ctx->mq;
1052 * @brief Add an envelope to a message passed to mq to list of pending messages
1054 * @param peer_ctx Context of the peer for which to insert the envelope
1055 * @param ev envelope to the message
1056 * @param type type of the message to be sent
1057 * @return pointer to pending message
1059 static struct PendingMessage *
1060 insert_pending_message (struct PeerContext *peer_ctx,
1061 struct GNUNET_MQ_Envelope *ev,
1064 struct PendingMessage *pending_msg;
1066 pending_msg = GNUNET_new (struct PendingMessage);
1067 pending_msg->ev = ev;
1068 pending_msg->peer_ctx = peer_ctx;
1069 pending_msg->type = type;
1070 GNUNET_CONTAINER_DLL_insert (peer_ctx->pending_messages_head,
1071 peer_ctx->pending_messages_tail,
1078 * @brief Remove a pending message from the respective DLL
1080 * @param pending_msg the pending message to remove
1081 * @param cancel whether to cancel the pending message, too
1084 remove_pending_message (struct PendingMessage *pending_msg, int cancel)
1086 struct PeerContext *peer_ctx;
1090 peer_ctx = pending_msg->peer_ctx;
1091 GNUNET_assert (NULL != peer_ctx);
1092 GNUNET_CONTAINER_DLL_remove (peer_ctx->pending_messages_head,
1093 peer_ctx->pending_messages_tail,
1095 // TODO wait for the cadet implementation of message cancellation
1096 // if (GNUNET_YES == cancel)
1098 // GNUNET_MQ_send_cancel (pending_msg->ev);
1100 GNUNET_free (pending_msg);
1105 * @brief This is called in response to the first message we sent as a
1108 * @param cls #PeerContext of peer with pending online check
1111 mq_online_check_successful (void *cls)
1113 struct PeerContext *peer_ctx = cls;
1115 if (NULL != peer_ctx->online_check_pending)
1117 LOG (GNUNET_ERROR_TYPE_DEBUG,
1118 "Online check for peer %s was successfull\n",
1119 GNUNET_i2s (&peer_ctx->peer_id));
1120 remove_pending_message (peer_ctx->online_check_pending, GNUNET_YES);
1121 peer_ctx->online_check_pending = NULL;
1122 set_peer_online (peer_ctx);
1123 (void) add_valid_peer (&peer_ctx->peer_id, peer_ctx->sub->valid_peers);
1128 * Issue a check whether peer is online
1130 * @param peer_ctx the context of the peer
1133 check_peer_online (struct PeerContext *peer_ctx)
1135 LOG (GNUNET_ERROR_TYPE_DEBUG,
1136 "Get informed about peer %s getting online\n",
1137 GNUNET_i2s (&peer_ctx->peer_id));
1139 struct GNUNET_MQ_Handle *mq;
1140 struct GNUNET_MQ_Envelope *ev;
1142 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE);
1143 peer_ctx->online_check_pending =
1144 insert_pending_message (peer_ctx, ev, "Check online");
1145 mq = get_mq (peer_ctx);
1146 GNUNET_MQ_notify_sent (ev,
1147 mq_online_check_successful,
1149 GNUNET_MQ_send (mq, ev);
1150 if (peer_ctx->sub == msub)
1152 GNUNET_STATISTICS_update (stats,
1153 "# pending online checks",
1161 * @brief Check whether function of type #PeerOp was already scheduled
1163 * The array with pending operations will probably never grow really big, so
1164 * iterating over it should be ok.
1166 * @param peer_ctx Context of the peer to check for the operation
1167 * @param peer_op the operation (#PeerOp) on the peer
1169 * @return #GNUNET_YES if this operation is scheduled on that peer
1170 * #GNUNET_NO otherwise
1173 check_operation_scheduled (const struct PeerContext *peer_ctx,
1174 const PeerOp peer_op)
1178 for (i = 0; i < peer_ctx->num_pending_ops; i++)
1179 if (peer_op == peer_ctx->pending_ops[i].op)
1186 * @brief Callback for scheduler to destroy a channel
1188 * @param cls Context of the channel
1191 destroy_channel (struct ChannelCtx *channel_ctx)
1193 struct GNUNET_CADET_Channel *channel;
1195 if (NULL != channel_ctx->destruction_task)
1197 GNUNET_SCHEDULER_cancel (channel_ctx->destruction_task);
1198 channel_ctx->destruction_task = NULL;
1200 GNUNET_assert (channel_ctx->channel != NULL);
1201 channel = channel_ctx->channel;
1202 channel_ctx->channel = NULL;
1203 GNUNET_CADET_channel_destroy (channel);
1204 remove_channel_ctx (channel_ctx);
1209 * @brief Destroy a cadet channel.
1211 * This satisfies the function signature of #GNUNET_SCHEDULER_TaskCallback.
1216 destroy_channel_cb (void *cls)
1218 struct ChannelCtx *channel_ctx = cls;
1220 channel_ctx->destruction_task = NULL;
1221 destroy_channel (channel_ctx);
1226 * @brief Schedule the destruction of a channel for immediately afterwards.
1228 * In case a channel is to be destroyed from within the callback to the
1229 * destruction of another channel (send channel), we cannot call
1230 * GNUNET_CADET_channel_destroy directly, but need to use this scheduling
1233 * @param channel_ctx channel to be destroyed.
1236 schedule_channel_destruction (struct ChannelCtx *channel_ctx)
1238 GNUNET_assert (NULL ==
1239 channel_ctx->destruction_task);
1240 GNUNET_assert (NULL !=
1241 channel_ctx->channel);
1242 channel_ctx->destruction_task =
1243 GNUNET_SCHEDULER_add_now (&destroy_channel_cb,
1249 * @brief Remove peer
1251 * - Empties the list with pending operations
1252 * - Empties the list with pending messages
1253 * - Cancels potentially existing online check
1254 * - Schedules closing of send and recv channels
1255 * - Removes peer from peer map
1257 * @param peer_ctx Context of the peer to be destroyed
1258 * @return #GNUNET_YES if peer was removed
1259 * #GNUNET_NO otherwise
1262 destroy_peer (struct PeerContext *peer_ctx)
1264 GNUNET_assert (NULL != peer_ctx);
1265 GNUNET_assert (NULL != peer_ctx->sub->peer_map);
1267 GNUNET_CONTAINER_multipeermap_contains (peer_ctx->sub->peer_map,
1268 &peer_ctx->peer_id))
1272 SET_PEER_FLAG (peer_ctx, Peers_TO_DESTROY);
1273 LOG (GNUNET_ERROR_TYPE_DEBUG,
1274 "Going to remove peer %s\n",
1275 GNUNET_i2s (&peer_ctx->peer_id));
1276 UNSET_PEER_FLAG (peer_ctx, Peers_ONLINE);
1278 /* Clear list of pending operations */
1279 // TODO this probably leaks memory
1280 // ('only' the cls to the function. Not sure what to do with it)
1281 GNUNET_array_grow (peer_ctx->pending_ops,
1282 peer_ctx->num_pending_ops,
1284 /* Remove all pending messages */
1285 while (NULL != peer_ctx->pending_messages_head)
1287 LOG (GNUNET_ERROR_TYPE_DEBUG,
1288 "Removing unsent %s\n",
1289 peer_ctx->pending_messages_head->type);
1290 /* Cancle pending message, too */
1291 if ((NULL != peer_ctx->online_check_pending) &&
1292 (0 == memcmp (peer_ctx->pending_messages_head,
1293 peer_ctx->online_check_pending,
1294 sizeof(struct PendingMessage))))
1296 peer_ctx->online_check_pending = NULL;
1297 if (peer_ctx->sub == msub)
1299 GNUNET_STATISTICS_update (stats,
1300 "# pending online checks",
1305 remove_pending_message (peer_ctx->pending_messages_head,
1309 /* If we are still waiting for notification whether this peer is online
1310 * cancel the according task */
1311 if (NULL != peer_ctx->online_check_pending)
1313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1314 "Removing pending online check for peer %s\n",
1315 GNUNET_i2s (&peer_ctx->peer_id));
1316 // TODO wait until cadet sets mq->cancel_impl
1317 // GNUNET_MQ_send_cancel (peer_ctx->online_check_pending->ev);
1318 remove_pending_message (peer_ctx->online_check_pending,
1320 peer_ctx->online_check_pending = NULL;
1323 if (NULL != peer_ctx->send_channel_ctx)
1325 /* This is possibly called from within channel destruction */
1326 peer_ctx->send_channel_ctx->peer_ctx = NULL;
1327 schedule_channel_destruction (peer_ctx->send_channel_ctx);
1328 peer_ctx->send_channel_ctx = NULL;
1329 peer_ctx->mq = NULL;
1331 if (NULL != peer_ctx->recv_channel_ctx)
1333 /* This is possibly called from within channel destruction */
1334 peer_ctx->recv_channel_ctx->peer_ctx = NULL;
1335 schedule_channel_destruction (peer_ctx->recv_channel_ctx);
1336 peer_ctx->recv_channel_ctx = NULL;
1340 GNUNET_CONTAINER_multipeermap_remove_all (peer_ctx->sub->peer_map,
1341 &peer_ctx->peer_id))
1343 LOG (GNUNET_ERROR_TYPE_WARNING,
1344 "removing peer from peer_ctx->sub->peer_map failed\n");
1346 if (peer_ctx->sub == msub)
1348 GNUNET_STATISTICS_set (stats,
1350 GNUNET_CONTAINER_multipeermap_size (
1351 peer_ctx->sub->peer_map),
1354 GNUNET_free (peer_ctx);
1360 * Iterator over hash map entries. Deletes all contexts of peers.
1362 * @param cls closure
1363 * @param key current public key
1364 * @param value value in the hash map
1365 * @return #GNUNET_YES if we should continue to iterate,
1366 * #GNUNET_NO if not.
1369 peermap_clear_iterator (void *cls,
1370 const struct GNUNET_PeerIdentity *key,
1373 struct Sub *sub = cls;
1377 destroy_peer (get_peer_ctx (sub->peer_map, key));
1383 * @brief This is called once a message is sent.
1385 * Removes the pending message
1387 * @param cls type of the message that was sent
1390 mq_notify_sent_cb (void *cls)
1392 struct PendingMessage *pending_msg = (struct PendingMessage *) cls;
1394 LOG (GNUNET_ERROR_TYPE_DEBUG,
1397 if (pending_msg->peer_ctx->sub == msub)
1399 if (0 == strncmp ("PULL REPLY", pending_msg->type, 10))
1400 GNUNET_STATISTICS_update (stats, "# pull replys sent", 1, GNUNET_NO);
1401 if (0 == strncmp ("PULL REQUEST", pending_msg->type, 12))
1402 GNUNET_STATISTICS_update (stats, "# pull requests sent", 1, GNUNET_NO);
1403 if (0 == strncmp ("PUSH", pending_msg->type, 4))
1404 GNUNET_STATISTICS_update (stats, "# pushes sent", 1, GNUNET_NO);
1405 if ((0 == strncmp ("PULL REQUEST", pending_msg->type, 12)) &&
1406 (NULL != map_single_hop) &&
1407 (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (map_single_hop,
1409 peer_ctx->peer_id)) )
1410 GNUNET_STATISTICS_update (stats,
1411 "# pull requests sent (multi-hop peer)",
1415 /* Do not cancle message */
1416 remove_pending_message (pending_msg, GNUNET_NO);
1421 * @brief Iterator function for #store_valid_peers.
1423 * Implements #GNUNET_CONTAINER_PeerMapIterator.
1424 * Writes single peer to disk.
1426 * @param cls the file handle to write to.
1427 * @param peer current peer
1428 * @param value unused
1430 * @return #GNUNET_YES if we should continue to
1432 * #GNUNET_NO if not.
1435 store_peer_presistently_iterator (void *cls,
1436 const struct GNUNET_PeerIdentity *peer,
1439 const struct GNUNET_DISK_FileHandle *fh = cls;
1440 char peer_string[128];
1450 size = GNUNET_snprintf (peer_string,
1451 sizeof(peer_string),
1453 GNUNET_i2s_full (peer));
1454 GNUNET_assert (53 == size);
1455 ret = GNUNET_DISK_file_write (fh,
1458 GNUNET_assert (size == ret);
1464 * @brief Store the peers currently in #valid_peers to disk.
1466 * @param sub Sub for which to store the valid peers
1469 store_valid_peers (const struct Sub *sub)
1471 struct GNUNET_DISK_FileHandle *fh;
1472 uint32_t number_written_peers;
1475 if (0 == strncmp ("DISABLE", sub->filename_valid_peers, 7))
1480 ret = GNUNET_DISK_directory_create_for_file (sub->filename_valid_peers);
1481 if (GNUNET_SYSERR == ret)
1483 LOG (GNUNET_ERROR_TYPE_WARNING,
1484 "Not able to create directory for file `%s'\n",
1485 sub->filename_valid_peers);
1488 else if (GNUNET_NO == ret)
1490 LOG (GNUNET_ERROR_TYPE_WARNING,
1491 "Directory for file `%s' exists but is not writable for us\n",
1492 sub->filename_valid_peers);
1495 fh = GNUNET_DISK_file_open (sub->filename_valid_peers,
1496 GNUNET_DISK_OPEN_WRITE
1497 | GNUNET_DISK_OPEN_CREATE,
1498 GNUNET_DISK_PERM_USER_READ
1499 | GNUNET_DISK_PERM_USER_WRITE);
1502 LOG (GNUNET_ERROR_TYPE_WARNING,
1503 "Not able to write valid peers to file `%s'\n",
1504 sub->filename_valid_peers);
1507 LOG (GNUNET_ERROR_TYPE_DEBUG,
1508 "Writing %u valid peers to disk\n",
1509 GNUNET_CONTAINER_multipeermap_size (sub->valid_peers));
1510 number_written_peers =
1511 GNUNET_CONTAINER_multipeermap_iterate (sub->valid_peers,
1512 store_peer_presistently_iterator,
1514 GNUNET_assert (GNUNET_OK == GNUNET_DISK_file_close (fh));
1515 GNUNET_assert (number_written_peers ==
1516 GNUNET_CONTAINER_multipeermap_size (sub->valid_peers));
1521 * @brief Convert string representation of peer id to peer id.
1523 * Counterpart to #GNUNET_i2s_full.
1525 * @param string_repr The string representation of the peer id
1527 * @return The peer id
1529 static const struct GNUNET_PeerIdentity *
1530 s2i_full (const char *string_repr)
1532 struct GNUNET_PeerIdentity *peer;
1536 peer = GNUNET_new (struct GNUNET_PeerIdentity);
1537 len = strlen (string_repr);
1540 LOG (GNUNET_ERROR_TYPE_WARNING,
1541 "Not able to convert string representation of PeerID to PeerID\n"
1542 "Sting representation: %s (len %lu) - too short\n",
1551 ret = GNUNET_CRYPTO_eddsa_public_key_from_string (string_repr,
1554 if (GNUNET_OK != ret)
1556 LOG (GNUNET_ERROR_TYPE_WARNING,
1557 "Not able to convert string representation of PeerID to PeerID\n"
1558 "Sting representation: %s\n",
1567 * @brief Restore the peers on disk to #valid_peers.
1569 * @param sub Sub for which to restore the valid peers
1572 restore_valid_peers (const struct Sub *sub)
1576 struct GNUNET_DISK_FileHandle *fh;
1581 const struct GNUNET_PeerIdentity *peer;
1583 if (0 == strncmp ("DISABLE", sub->filename_valid_peers, 7))
1588 if (GNUNET_OK != GNUNET_DISK_file_test (sub->filename_valid_peers))
1592 fh = GNUNET_DISK_file_open (sub->filename_valid_peers,
1593 GNUNET_DISK_OPEN_READ,
1594 GNUNET_DISK_PERM_NONE);
1595 GNUNET_assert (NULL != fh);
1596 GNUNET_assert (GNUNET_OK == GNUNET_DISK_file_handle_size (fh, &file_size));
1597 num_peers = file_size / 53;
1598 buf = GNUNET_malloc (file_size);
1599 size_read = GNUNET_DISK_file_read (fh, buf, file_size);
1600 GNUNET_assert (size_read == file_size);
1601 LOG (GNUNET_ERROR_TYPE_DEBUG,
1602 "Restoring %" PRIu32 " peers from file `%s'\n",
1604 sub->filename_valid_peers);
1605 for (iter_buf = buf; iter_buf < buf + file_size - 1; iter_buf += 53)
1607 str_repr = GNUNET_strndup (iter_buf, 53);
1608 peer = s2i_full (str_repr);
1609 GNUNET_free (str_repr);
1610 add_valid_peer (peer, sub->valid_peers);
1611 LOG (GNUNET_ERROR_TYPE_DEBUG,
1612 "Restored valid peer %s from disk\n",
1613 GNUNET_i2s_full (peer));
1617 LOG (GNUNET_ERROR_TYPE_DEBUG,
1618 "num_peers: %" PRIu32 ", _size (sub->valid_peers): %u\n",
1620 GNUNET_CONTAINER_multipeermap_size (sub->valid_peers));
1621 if (num_peers != GNUNET_CONTAINER_multipeermap_size (sub->valid_peers))
1623 LOG (GNUNET_ERROR_TYPE_WARNING,
1624 "Number of restored peers does not match file size. Have probably duplicates.\n");
1626 GNUNET_assert (GNUNET_OK == GNUNET_DISK_file_close (fh));
1627 LOG (GNUNET_ERROR_TYPE_DEBUG,
1628 "Restored %u valid peers from disk\n",
1629 GNUNET_CONTAINER_multipeermap_size (sub->valid_peers));
1634 * @brief Delete storage of peers that was created with #initialise_peers ()
1636 * @param sub Sub for which the storage is deleted
1639 peers_terminate (struct Sub *sub)
1641 if (GNUNET_SYSERR ==
1642 GNUNET_CONTAINER_multipeermap_iterate (sub->peer_map,
1643 &peermap_clear_iterator,
1646 LOG (GNUNET_ERROR_TYPE_WARNING,
1647 "Iteration destroying peers was aborted.\n");
1649 GNUNET_CONTAINER_multipeermap_destroy (sub->peer_map);
1650 sub->peer_map = NULL;
1651 store_valid_peers (sub);
1652 GNUNET_free (sub->filename_valid_peers);
1653 sub->filename_valid_peers = NULL;
1654 GNUNET_CONTAINER_multipeermap_destroy (sub->valid_peers);
1655 sub->valid_peers = NULL;
1660 * Iterator over #valid_peers hash map entries.
1662 * @param cls Closure that contains iterator function and closure
1663 * @param peer current peer id
1664 * @param value value in the hash map - unused
1665 * @return #GNUNET_YES if we should continue to
1667 * #GNUNET_NO if not.
1670 valid_peer_iterator (void *cls,
1671 const struct GNUNET_PeerIdentity *peer,
1674 struct PeersIteratorCls *it_cls = cls;
1678 return it_cls->iterator (it_cls->cls, peer);
1683 * @brief Get all currently known, valid peer ids.
1685 * @param valid_peers Peer map containing the valid peers in question
1686 * @param iterator function to call on each peer id
1687 * @param it_cls extra argument to @a iterator
1688 * @return the number of key value pairs processed,
1689 * #GNUNET_SYSERR if it aborted iteration
1692 get_valid_peers (struct GNUNET_CONTAINER_MultiPeerMap *valid_peers,
1693 PeersIterator iterator,
1696 struct PeersIteratorCls *cls;
1699 cls = GNUNET_new (struct PeersIteratorCls);
1700 cls->iterator = iterator;
1702 ret = GNUNET_CONTAINER_multipeermap_iterate (valid_peers,
1703 valid_peer_iterator,
1711 * @brief Add peer to known peers.
1713 * This function is called on new peer_ids from 'external' sources
1714 * (client seed, cadet get_peers(), ...)
1716 * @param sub Sub with the peer map that the @a peer will be added to
1717 * @param peer the new #GNUNET_PeerIdentity
1719 * @return #GNUNET_YES if peer was inserted
1720 * #GNUNET_NO otherwise
1723 insert_peer (struct Sub *sub,
1724 const struct GNUNET_PeerIdentity *peer)
1726 if (GNUNET_YES == check_peer_known (sub->peer_map, peer))
1728 return GNUNET_NO; /* We already know this peer - nothing to do */
1730 (void) create_peer_ctx (sub, peer);
1736 * @brief Check whether flags on a peer are set.
1738 * @param peer_map Peer map that is expected to contain the @a peer
1739 * @param peer the peer to check the flag of
1740 * @param flags the flags to check
1742 * @return #GNUNET_SYSERR if peer is not known
1743 * #GNUNET_YES if all given flags are set
1744 * #GNUNET_NO otherwise
1747 check_peer_flag (const struct GNUNET_CONTAINER_MultiPeerMap *peer_map,
1748 const struct GNUNET_PeerIdentity *peer,
1749 enum Peers_PeerFlags flags)
1751 struct PeerContext *peer_ctx;
1753 if (GNUNET_NO == check_peer_known (peer_map, peer))
1755 return GNUNET_SYSERR;
1757 peer_ctx = get_peer_ctx (peer_map, peer);
1758 return check_peer_flag_set (peer_ctx, flags);
1762 * @brief Try connecting to a peer to see whether it is online
1764 * If not known yet, insert into known peers
1766 * @param sub Sub which would contain the @a peer
1767 * @param peer the peer whose online is to be checked
1768 * @return #GNUNET_YES if the check was issued
1769 * #GNUNET_NO otherwise
1772 issue_peer_online_check (struct Sub *sub,
1773 const struct GNUNET_PeerIdentity *peer)
1775 struct PeerContext *peer_ctx;
1777 (void) insert_peer (sub, peer); // TODO even needed?
1778 peer_ctx = get_peer_ctx (sub->peer_map, peer);
1779 if ((GNUNET_NO == check_peer_flag (sub->peer_map, peer, Peers_ONLINE)) &&
1780 (NULL == peer_ctx->online_check_pending))
1782 check_peer_online (peer_ctx);
1790 * @brief Check if peer is removable.
1793 * - a recv channel exists
1794 * - there are pending messages
1795 * - there is no pending pull reply
1797 * @param peer_ctx Context of the peer in question
1798 * @return #GNUNET_YES if peer is removable
1799 * #GNUNET_NO if peer is NOT removable
1800 * #GNUNET_SYSERR if peer is not known
1803 check_removable (const struct PeerContext *peer_ctx)
1805 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (
1806 peer_ctx->sub->peer_map,
1807 &peer_ctx->peer_id))
1809 return GNUNET_SYSERR;
1812 if ((NULL != peer_ctx->recv_channel_ctx) ||
1813 (NULL != peer_ctx->pending_messages_head) ||
1814 (GNUNET_YES == check_peer_flag_set (peer_ctx, Peers_PULL_REPLY_PENDING)))
1823 * @brief Check whether @a peer is actually a peer.
1825 * A valid peer is a peer that we know exists eg. we were connected to once.
1827 * @param valid_peers Peer map that would contain the @a peer
1828 * @param peer peer in question
1830 * @return #GNUNET_YES if peer is valid
1831 * #GNUNET_NO if peer is not valid
1834 check_peer_valid (const struct GNUNET_CONTAINER_MultiPeerMap *valid_peers,
1835 const struct GNUNET_PeerIdentity *peer)
1837 return GNUNET_CONTAINER_multipeermap_contains (valid_peers, peer);
1842 * @brief Indicate that we want to send to the other peer
1844 * This establishes a sending channel
1846 * @param peer_ctx Context of the target peer
1849 indicate_sending_intention (struct PeerContext *peer_ctx)
1851 GNUNET_assert (GNUNET_YES == check_peer_known (peer_ctx->sub->peer_map,
1852 &peer_ctx->peer_id));
1853 (void) get_channel (peer_ctx);
1858 * @brief Check whether other peer has the intention to send/opened channel
1861 * @param peer_ctx Context of the peer in question
1863 * @return #GNUNET_YES if peer has the intention to send
1864 * #GNUNET_NO otherwise
1867 check_peer_send_intention (const struct PeerContext *peer_ctx)
1869 if (NULL != peer_ctx->recv_channel_ctx)
1878 * Handle the channel a peer opens to us.
1880 * @param cls The closure - Sub
1881 * @param channel The channel the peer wants to establish
1882 * @param initiator The peer's peer ID
1884 * @return initial channel context for the channel
1885 * (can be NULL -- that's not an error)
1888 handle_inbound_channel (void *cls,
1889 struct GNUNET_CADET_Channel *channel,
1890 const struct GNUNET_PeerIdentity *initiator)
1892 struct PeerContext *peer_ctx;
1893 struct ChannelCtx *channel_ctx;
1894 struct Sub *sub = cls;
1896 LOG (GNUNET_ERROR_TYPE_DEBUG,
1897 "New channel was established to us (Peer %s).\n",
1898 GNUNET_i2s (initiator));
1899 GNUNET_assert (NULL != channel); /* according to cadet API */
1900 /* Make sure we 'know' about this peer */
1901 peer_ctx = create_or_get_peer_ctx (sub, initiator);
1902 set_peer_online (peer_ctx);
1903 (void) add_valid_peer (&peer_ctx->peer_id, peer_ctx->sub->valid_peers);
1904 channel_ctx = add_channel_ctx (peer_ctx);
1905 channel_ctx->channel = channel;
1906 /* We only accept one incoming channel per peer */
1907 if (GNUNET_YES == check_peer_send_intention (get_peer_ctx (sub->peer_map,
1910 LOG (GNUNET_ERROR_TYPE_WARNING,
1911 "Already got one receive channel. Destroying old one.\n");
1912 GNUNET_break_op (0);
1913 destroy_channel (peer_ctx->recv_channel_ctx);
1914 peer_ctx->recv_channel_ctx = channel_ctx;
1915 /* return the channel context */
1918 peer_ctx->recv_channel_ctx = channel_ctx;
1924 * @brief Check whether a sending channel towards the given peer exists
1926 * @param peer_ctx Context of the peer in question
1928 * @return #GNUNET_YES if a sending channel towards that peer exists
1929 * #GNUNET_NO otherwise
1932 check_sending_channel_exists (const struct PeerContext *peer_ctx)
1934 if (GNUNET_NO == check_peer_known (peer_ctx->sub->peer_map,
1935 &peer_ctx->peer_id))
1936 { /* If no such peer exists, there is no channel */
1939 if (NULL == peer_ctx->send_channel_ctx)
1948 * @brief Destroy the send channel of a peer e.g. stop indicating a sending
1949 * intention to another peer
1951 * @param peer_ctx Context to the peer
1952 * @return #GNUNET_YES if channel was destroyed
1953 * #GNUNET_NO otherwise
1956 destroy_sending_channel (struct PeerContext *peer_ctx)
1958 if (GNUNET_NO == check_peer_known (peer_ctx->sub->peer_map,
1959 &peer_ctx->peer_id))
1963 if (NULL != peer_ctx->send_channel_ctx)
1965 destroy_channel (peer_ctx->send_channel_ctx);
1966 (void) check_connected (peer_ctx);
1973 * @brief Send a message to another peer.
1975 * Keeps track about pending messages so they can be properly removed when the
1976 * peer is destroyed.
1978 * @param peer_ctx Context of the peer to which the message is to be sent
1979 * @param ev envelope of the message
1980 * @param type type of the message
1983 send_message (struct PeerContext *peer_ctx,
1984 struct GNUNET_MQ_Envelope *ev,
1987 struct PendingMessage *pending_msg;
1988 struct GNUNET_MQ_Handle *mq;
1990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1991 "Sending message to %s of type %s\n",
1992 GNUNET_i2s (&peer_ctx->peer_id),
1994 pending_msg = insert_pending_message (peer_ctx, ev, type);
1995 mq = get_mq (peer_ctx);
1996 GNUNET_MQ_notify_sent (ev,
1999 GNUNET_MQ_send (mq, ev);
2003 * @brief Schedule a operation on given peer
2005 * Avoids scheduling an operation twice.
2007 * @param peer_ctx Context of the peer for which to schedule the operation
2008 * @param peer_op the operation to schedule
2009 * @param cls Closure to @a peer_op
2011 * @return #GNUNET_YES if the operation was scheduled
2012 * #GNUNET_NO otherwise
2015 schedule_operation (struct PeerContext *peer_ctx,
2016 const PeerOp peer_op,
2019 struct PeerPendingOp pending_op;
2021 GNUNET_assert (GNUNET_YES == check_peer_known (peer_ctx->sub->peer_map,
2022 &peer_ctx->peer_id));
2024 // TODO if ONLINE execute immediately
2026 if (GNUNET_NO == check_operation_scheduled (peer_ctx, peer_op))
2028 pending_op.op = peer_op;
2029 pending_op.op_cls = cls;
2030 GNUNET_array_append (peer_ctx->pending_ops,
2031 peer_ctx->num_pending_ops,
2038 /***********************************************************************
2039 * /Old gnunet-service-rps_peers.c
2040 ***********************************************************************/
2043 /***********************************************************************
2044 * Housekeeping with clients
2045 ***********************************************************************/
2048 * Closure used to pass the client and the id to the callback
2049 * that replies to a client's request
2056 struct ReplyCls *next;
2057 struct ReplyCls *prev;
2060 * The identifier of the request
2065 * The handle to the request
2067 struct RPS_SamplerRequestHandle *req_handle;
2070 * The client handle to send the reply to
2072 struct ClientContext *cli_ctx;
2077 * Struct used to store the context of a connected client.
2079 struct ClientContext
2084 struct ClientContext *next;
2085 struct ClientContext *prev;
2088 * The message queue to communicate with the client.
2090 struct GNUNET_MQ_Handle *mq;
2093 * @brief How many updates this client expects to receive.
2095 int64_t view_updates_left;
2098 * @brief Whether this client wants to receive stream updates.
2099 * Either #GNUNET_YES or #GNUNET_NO
2101 int8_t stream_update;
2104 * The client handle to send the reply to
2106 struct GNUNET_SERVICE_Client *client;
2109 * The #Sub this context belongs to
2115 * DLL with all clients currently connected to us
2117 struct ClientContext *cli_ctx_head;
2118 struct ClientContext *cli_ctx_tail;
2120 /***********************************************************************
2121 * /Housekeeping with clients
2122 ***********************************************************************/
2128 /***********************************************************************
2130 ***********************************************************************/
2134 * Print peerlist to log.
2137 print_peer_list (struct GNUNET_PeerIdentity *list,
2142 LOG (GNUNET_ERROR_TYPE_DEBUG,
2143 "Printing peer list of length %u at %p:\n",
2146 for (i = 0; i < len; i++)
2148 LOG (GNUNET_ERROR_TYPE_DEBUG,
2150 i, GNUNET_i2s (&list[i]));
2156 * Remove peer from list.
2159 rem_from_list (struct GNUNET_PeerIdentity **peer_list,
2160 unsigned int *list_size,
2161 const struct GNUNET_PeerIdentity *peer)
2164 struct GNUNET_PeerIdentity *tmp;
2168 LOG (GNUNET_ERROR_TYPE_DEBUG,
2169 "Removing peer %s from list at %p\n",
2173 for (i = 0; i < *list_size; i++)
2175 if (0 == GNUNET_memcmp (&tmp[i], peer))
2177 if (i < *list_size - 1)
2178 { /* Not at the last entry -- shift peers left */
2179 memmove (&tmp[i], &tmp[i + 1],
2180 ((*list_size) - i - 1) * sizeof(struct GNUNET_PeerIdentity));
2182 /* Remove last entry (should be now useless PeerID) */
2183 GNUNET_array_grow (tmp, *list_size, (*list_size) - 1);
2191 * Insert PeerID in #view
2193 * Called once we know a peer is online.
2194 * Implements #PeerOp
2196 * @return GNUNET_OK if peer was actually inserted
2197 * GNUNET_NO if peer was not inserted
2200 insert_in_view_op (void *cls,
2201 const struct GNUNET_PeerIdentity *peer);
2204 * Insert PeerID in #view
2206 * Called once we know a peer is online.
2208 * @param sub Sub in with the view to insert in
2209 * @param peer the peer to insert
2211 * @return GNUNET_OK if peer was actually inserted
2212 * GNUNET_NO if peer was not inserted
2215 insert_in_view (struct Sub *sub,
2216 const struct GNUNET_PeerIdentity *peer)
2218 struct PeerContext *peer_ctx;
2222 online = check_peer_flag (sub->peer_map, peer, Peers_ONLINE);
2223 peer_ctx = get_peer_ctx (sub->peer_map, peer); // TODO indirection needed?
2224 if ((GNUNET_NO == online) ||
2225 (GNUNET_SYSERR == online)) /* peer is not even known */
2227 (void) issue_peer_online_check (sub, peer);
2228 (void) schedule_operation (peer_ctx, insert_in_view_op, sub);
2231 /* Open channel towards peer to keep connection open */
2232 indicate_sending_intention (peer_ctx);
2233 ret = View_put (sub->view, peer);
2234 if (peer_ctx->sub == msub)
2236 GNUNET_STATISTICS_set (stats,
2238 View_size (peer_ctx->sub->view),
2246 * @brief Send view to client
2248 * @param cli_ctx the context of the client
2249 * @param view_array the peerids of the view as array (can be empty)
2250 * @param view_size the size of the view array (can be 0)
2253 send_view (const struct ClientContext *cli_ctx,
2254 const struct GNUNET_PeerIdentity *view_array,
2257 struct GNUNET_MQ_Envelope *ev;
2258 struct GNUNET_RPS_CS_DEBUG_ViewReply *out_msg;
2261 if (NULL == view_array)
2263 if (NULL == cli_ctx->sub)
2267 view_size = View_size (sub->view);
2268 view_array = View_get_as_array (sub->view);
2271 ev = GNUNET_MQ_msg_extra (out_msg,
2272 view_size * sizeof(struct GNUNET_PeerIdentity),
2273 GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_VIEW_REPLY);
2274 out_msg->num_peers = htonl (view_size);
2276 GNUNET_memcpy (&out_msg[1],
2278 view_size * sizeof(struct GNUNET_PeerIdentity));
2279 GNUNET_MQ_send (cli_ctx->mq, ev);
2284 * @brief Send peer from biased stream to client.
2286 * TODO merge with send_view, parameterise
2288 * @param cli_ctx the context of the client
2289 * @param view_array the peerids of the view as array (can be empty)
2290 * @param view_size the size of the view array (can be 0)
2293 send_stream_peers (const struct ClientContext *cli_ctx,
2295 const struct GNUNET_PeerIdentity *peers)
2297 struct GNUNET_MQ_Envelope *ev;
2298 struct GNUNET_RPS_CS_DEBUG_StreamReply *out_msg;
2300 GNUNET_assert (NULL != peers);
2302 ev = GNUNET_MQ_msg_extra (out_msg,
2303 num_peers * sizeof(struct GNUNET_PeerIdentity),
2304 GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_STREAM_REPLY);
2305 out_msg->num_peers = htonl (num_peers);
2307 GNUNET_memcpy (&out_msg[1],
2309 num_peers * sizeof(struct GNUNET_PeerIdentity));
2310 GNUNET_MQ_send (cli_ctx->mq, ev);
2315 * @brief sends updates to clients that are interested
2317 * @param sub Sub for which to notify clients
2320 clients_notify_view_update (const struct Sub *sub)
2322 struct ClientContext *cli_ctx_iter;
2324 const struct GNUNET_PeerIdentity *view_array;
2326 num_peers = View_size (sub->view);
2327 view_array = View_get_as_array (sub->view);
2328 /* check size of view is small enough */
2329 if (GNUNET_MAX_MESSAGE_SIZE < num_peers)
2331 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2332 "View is too big to send\n");
2336 for (cli_ctx_iter = cli_ctx_head;
2337 NULL != cli_ctx_iter;
2338 cli_ctx_iter = cli_ctx_iter->next)
2340 if (1 < cli_ctx_iter->view_updates_left)
2342 /* Client wants to receive limited amount of updates */
2343 cli_ctx_iter->view_updates_left -= 1;
2345 else if (1 == cli_ctx_iter->view_updates_left)
2347 /* Last update of view for client */
2348 cli_ctx_iter->view_updates_left = -1;
2350 else if (0 > cli_ctx_iter->view_updates_left)
2352 /* Client is not interested in updates */
2355 /* else _updates_left == 0 - infinite amount of updates */
2358 send_view (cli_ctx_iter, view_array, num_peers);
2364 * @brief sends updates to clients that are interested
2366 * @param num_peers Number of peers to send
2367 * @param peers the array of peers to send
2370 clients_notify_stream_peer (const struct Sub *sub,
2372 const struct GNUNET_PeerIdentity *peers)
2373 // TODO enum StreamPeerSource)
2375 struct ClientContext *cli_ctx_iter;
2377 LOG (GNUNET_ERROR_TYPE_DEBUG,
2378 "Got peer (%s) from biased stream - update all clients\n",
2379 GNUNET_i2s (peers));
2381 for (cli_ctx_iter = cli_ctx_head;
2382 NULL != cli_ctx_iter;
2383 cli_ctx_iter = cli_ctx_iter->next)
2385 if ((GNUNET_YES == cli_ctx_iter->stream_update) &&
2386 ((sub == cli_ctx_iter->sub) ||(sub == msub) ))
2388 send_stream_peers (cli_ctx_iter, num_peers, peers);
2395 * Put random peer from sampler into the view as history update.
2397 * @param ids Array of Peers to insert into view
2398 * @param num_peers Number of peers to insert
2399 * @param cls Closure - The Sub for which this is to be done
2402 hist_update (const struct GNUNET_PeerIdentity *ids,
2407 struct Sub *sub = cls;
2409 for (i = 0; i < num_peers; i++)
2412 if (GNUNET_YES != check_peer_known (sub->peer_map, &ids[i]))
2414 LOG (GNUNET_ERROR_TYPE_WARNING,
2415 "Peer in history update not known!\n");
2418 inserted = insert_in_view (sub, &ids[i]);
2419 if (GNUNET_OK == inserted)
2421 clients_notify_stream_peer (sub, 1, &ids[i]);
2424 to_file (sub->file_name_view_log,
2426 GNUNET_i2s_full (ids));
2427 #endif /* TO_FILE_FULL */
2429 clients_notify_view_update (sub);
2434 * Wrapper around #RPS_sampler_resize()
2436 * If we do not have enough sampler elements, double current sampler size
2437 * If we have more than enough sampler elements, halv current sampler size
2439 * @param sampler The sampler to resize
2440 * @param new_size New size to which to resize
2443 resize_wrapper (struct RPS_Sampler *sampler, uint32_t new_size)
2445 unsigned int sampler_size;
2448 // TODO respect the min, max
2449 sampler_size = RPS_sampler_get_size (sampler);
2450 if (sampler_size > new_size * 4)
2452 RPS_sampler_resize (sampler, sampler_size / 2);
2454 else if (sampler_size < new_size)
2456 RPS_sampler_resize (sampler, sampler_size * 2);
2458 LOG (GNUNET_ERROR_TYPE_DEBUG, "sampler_size is now %u\n", sampler_size);
2463 * Add all peers in @a peer_array to @a peer_map used as set.
2465 * @param peer_array array containing the peers
2466 * @param num_peers number of peers in @peer_array
2467 * @param peer_map the peermap to use as set
2470 add_peer_array_to_set (const struct GNUNET_PeerIdentity *peer_array,
2471 unsigned int num_peers,
2472 struct GNUNET_CONTAINER_MultiPeerMap *peer_map)
2476 if (NULL == peer_map)
2478 LOG (GNUNET_ERROR_TYPE_WARNING,
2479 "Trying to add peers to non-existing peermap.\n");
2483 for (i = 0; i < num_peers; i++)
2485 GNUNET_CONTAINER_multipeermap_put (peer_map,
2488 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
2489 if (msub->peer_map == peer_map)
2491 GNUNET_STATISTICS_set (stats,
2493 GNUNET_CONTAINER_multipeermap_size (peer_map),
2501 * Send a PULL REPLY to @a peer_id
2503 * @param peer_ctx Context of the peer to send the reply to
2504 * @param peer_ids the peers to send to @a peer_id
2505 * @param num_peer_ids the number of peers to send to @a peer_id
2508 send_pull_reply (struct PeerContext *peer_ctx,
2509 const struct GNUNET_PeerIdentity *peer_ids,
2510 unsigned int num_peer_ids)
2513 struct GNUNET_MQ_Envelope *ev;
2514 struct GNUNET_RPS_P2P_PullReplyMessage *out_msg;
2516 /* Compute actual size */
2517 send_size = sizeof(struct GNUNET_RPS_P2P_PullReplyMessage)
2518 + num_peer_ids * sizeof(struct GNUNET_PeerIdentity);
2520 if (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < send_size)
2521 /* Compute number of peers to send
2522 * If too long, simply truncate */
2523 // TODO select random ones via permutation
2524 // or even better: do good protocol design
2526 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE
2527 - sizeof(struct GNUNET_RPS_P2P_PullReplyMessage))
2528 / sizeof(struct GNUNET_PeerIdentity);
2530 send_size = num_peer_ids;
2532 LOG (GNUNET_ERROR_TYPE_DEBUG,
2533 "Going to send PULL REPLY with %u peers to %s\n",
2534 send_size, GNUNET_i2s (&peer_ctx->peer_id));
2536 ev = GNUNET_MQ_msg_extra (out_msg,
2537 send_size * sizeof(struct GNUNET_PeerIdentity),
2538 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY);
2539 out_msg->num_peers = htonl (send_size);
2540 GNUNET_memcpy (&out_msg[1], peer_ids,
2541 send_size * sizeof(struct GNUNET_PeerIdentity));
2543 send_message (peer_ctx, ev, "PULL REPLY");
2544 if (peer_ctx->sub == msub)
2546 GNUNET_STATISTICS_update (stats, "# pull reply send issued", 1, GNUNET_NO);
2548 // TODO check with send intention: as send_channel is used/opened we indicate
2549 // a sending intention without intending it.
2550 // -> clean peer afterwards?
2551 // -> use recv_channel?
2556 * Insert PeerID in #pull_map
2558 * Called once we know a peer is online.
2560 * @param cls Closure - Sub with the pull map to insert into
2561 * @param peer Peer to insert
2564 insert_in_pull_map (void *cls,
2565 const struct GNUNET_PeerIdentity *peer)
2567 struct Sub *sub = cls;
2569 CustomPeerMap_put (sub->pull_map, peer);
2574 * Insert PeerID in #view
2576 * Called once we know a peer is online.
2577 * Implements #PeerOp
2579 * @param cls Closure - Sub with view to insert peer into
2580 * @param peer the peer to insert
2583 insert_in_view_op (void *cls,
2584 const struct GNUNET_PeerIdentity *peer)
2586 struct Sub *sub = cls;
2589 inserted = insert_in_view (sub, peer);
2590 if (GNUNET_OK == inserted)
2592 clients_notify_stream_peer (sub, 1, peer);
2598 * Update sampler with given PeerID.
2599 * Implements #PeerOp
2601 * @param cls Closure - Sub containing the sampler to insert into
2602 * @param peer Peer to insert
2605 insert_in_sampler (void *cls,
2606 const struct GNUNET_PeerIdentity *peer)
2608 struct Sub *sub = cls;
2610 LOG (GNUNET_ERROR_TYPE_DEBUG,
2611 "Updating samplers with peer %s from insert_in_sampler()\n",
2613 RPS_sampler_update (sub->sampler, peer);
2614 if (0 < RPS_sampler_count_id (sub->sampler, peer))
2616 /* Make sure we 'know' about this peer */
2617 (void) issue_peer_online_check (sub, peer);
2618 /* Establish a channel towards that peer to indicate we are going to send
2620 // indicate_sending_intention (peer);
2624 GNUNET_STATISTICS_update (stats,
2625 "# observed peers in gossip",
2630 sub->num_observed_peers++;
2631 GNUNET_CONTAINER_multipeermap_put
2632 (sub->observed_unique_peers,
2635 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2636 uint32_t num_observed_unique_peers =
2637 GNUNET_CONTAINER_multipeermap_size (sub->observed_unique_peers);
2638 GNUNET_STATISTICS_set (stats,
2639 "# unique peers in gossip",
2640 num_observed_unique_peers,
2643 to_file (sub->file_name_observed_log,
2644 "%" PRIu32 " %" PRIu32 " %f\n",
2645 sub->num_observed_peers,
2646 num_observed_unique_peers,
2647 1.0 * num_observed_unique_peers / sub->num_observed_peers)
2648 #endif /* TO_FILE_FULL */
2649 #endif /* TO_FILE */
2654 * @brief This is called on peers from external sources (cadet, peerinfo, ...)
2655 * If the peer is not known, online check is issued and it is
2656 * scheduled to be inserted in sampler and view.
2658 * "External sources" refer to every source except the gossip.
2660 * @param sub Sub for which @a peer was received
2661 * @param peer peer to insert/peer received
2664 got_peer (struct Sub *sub,
2665 const struct GNUNET_PeerIdentity *peer)
2667 /* If we did not know this peer already, insert it into sampler and view */
2668 if (GNUNET_YES == issue_peer_online_check (sub, peer))
2670 schedule_operation (get_peer_ctx (sub->peer_map, peer),
2671 &insert_in_sampler, sub);
2672 schedule_operation (get_peer_ctx (sub->peer_map, peer),
2673 &insert_in_view_op, sub);
2677 GNUNET_STATISTICS_update (stats,
2686 * @brief Checks if there is a sending channel and if it is needed
2688 * @param peer_ctx Context of the peer to check
2689 * @return GNUNET_YES if sending channel exists and is still needed
2690 * GNUNET_NO otherwise
2693 check_sending_channel_needed (const struct PeerContext *peer_ctx)
2695 /* struct GNUNET_CADET_Channel *channel; */
2696 if (GNUNET_NO == check_peer_known (peer_ctx->sub->peer_map,
2697 &peer_ctx->peer_id))
2701 if (GNUNET_YES == check_sending_channel_exists (peer_ctx))
2703 if ((0 < RPS_sampler_count_id (peer_ctx->sub->sampler,
2704 &peer_ctx->peer_id)) ||
2705 (GNUNET_YES == View_contains_peer (peer_ctx->sub->view,
2706 &peer_ctx->peer_id)) ||
2707 (GNUNET_YES == CustomPeerMap_contains_peer (peer_ctx->sub->push_map,
2708 &peer_ctx->peer_id)) ||
2709 (GNUNET_YES == CustomPeerMap_contains_peer (peer_ctx->sub->pull_map,
2710 &peer_ctx->peer_id)) ||
2711 (GNUNET_YES == check_peer_flag (peer_ctx->sub->peer_map,
2713 Peers_PULL_REPLY_PENDING)))
2714 { /* If we want to keep the connection to peer open */
2724 * @brief remove peer from our knowledge, the view, push and pull maps and
2727 * @param sub Sub with the data structures the peer is to be removed from
2728 * @param peer the peer to remove
2731 remove_peer (struct Sub *sub,
2732 const struct GNUNET_PeerIdentity *peer)
2734 (void) View_remove_peer (sub->view,
2736 CustomPeerMap_remove_peer (sub->pull_map,
2738 CustomPeerMap_remove_peer (sub->push_map,
2740 RPS_sampler_reinitialise_by_value (sub->sampler,
2742 /* We want to destroy the peer now.
2743 * Sometimes, it just seems that it's already been removed from the peer_map,
2744 * so check the peer_map first. */
2745 if (GNUNET_YES == check_peer_known (sub->peer_map,
2748 destroy_peer (get_peer_ctx (sub->peer_map,
2755 * @brief Remove data that is not needed anymore.
2757 * If the sending channel is no longer needed it is destroyed.
2759 * @param sub Sub in which the current peer is to be cleaned
2760 * @param peer the peer whose data is about to be cleaned
2763 clean_peer (struct Sub *sub,
2764 const struct GNUNET_PeerIdentity *peer)
2766 if (GNUNET_NO == check_sending_channel_needed (get_peer_ctx (sub->peer_map,
2769 LOG (GNUNET_ERROR_TYPE_DEBUG,
2770 "Going to remove send channel to peer %s\n",
2772 #if ENABLE_MALICIOUS
2773 if (0 != GNUNET_memcmp (&attacked_peer,
2775 (void) destroy_sending_channel (get_peer_ctx (sub->peer_map,
2777 #else /* ENABLE_MALICIOUS */
2778 (void) destroy_sending_channel (get_peer_ctx (sub->peer_map,
2780 #endif /* ENABLE_MALICIOUS */
2783 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (sub->peer_map,
2786 /* Peer was already removed by callback on destroyed channel */
2787 LOG (GNUNET_ERROR_TYPE_WARNING,
2788 "Peer was removed from our knowledge during cleanup\n");
2792 if ((GNUNET_NO == check_peer_send_intention (get_peer_ctx (sub->peer_map,
2794 (GNUNET_NO == View_contains_peer (sub->view, peer)) &&
2795 (GNUNET_NO == CustomPeerMap_contains_peer (sub->push_map, peer)) &&
2796 (GNUNET_NO == CustomPeerMap_contains_peer (sub->push_map, peer)) &&
2797 (0 == RPS_sampler_count_id (sub->sampler, peer)) &&
2798 (GNUNET_YES == check_removable (get_peer_ctx (sub->peer_map, peer))))
2799 { /* We can safely remove this peer */
2800 LOG (GNUNET_ERROR_TYPE_DEBUG,
2801 "Going to remove peer %s\n",
2803 remove_peer (sub, peer);
2810 * @brief This is called when a channel is destroyed.
2812 * Removes peer completely from our knowledge if the send_channel was destroyed
2813 * Otherwise simply delete the recv_channel
2814 * Also check if the knowledge about this peer is still needed.
2815 * If not, remove this peer from our knowledge.
2817 * @param cls The closure - Context to the channel
2818 * @param channel The channel being closed
2821 cleanup_destroyed_channel (void *cls,
2822 const struct GNUNET_CADET_Channel *channel)
2824 struct ChannelCtx *channel_ctx = cls;
2825 struct PeerContext *peer_ctx = channel_ctx->peer_ctx;
2829 channel_ctx->channel = NULL;
2830 remove_channel_ctx (channel_ctx);
2831 if ((NULL != peer_ctx)&&
2832 (peer_ctx->send_channel_ctx == channel_ctx) &&
2833 (GNUNET_YES == check_sending_channel_needed (channel_ctx->peer_ctx)) )
2835 remove_peer (peer_ctx->sub, &peer_ctx->peer_id);
2839 /***********************************************************************
2841 ***********************************************************************/
2845 /***********************************************************************
2847 ***********************************************************************/
2850 * @brief Create a new Sub
2852 * @param hash Hash of value shared among rps instances on other hosts that
2853 * defines a subgroup to sample from.
2854 * @param sampler_size Size of the sampler
2855 * @param round_interval Interval (in average) between two rounds
2860 new_sub (const struct GNUNET_HashCode *hash,
2861 uint32_t sampler_size,
2862 struct GNUNET_TIME_Relative round_interval)
2866 sub = GNUNET_new (struct Sub);
2868 /* With the hash generated from the secret value this service only connects
2869 * to rps instances that share the value */
2870 struct GNUNET_MQ_MessageHandler cadet_handlers[] = {
2871 GNUNET_MQ_hd_fixed_size (peer_check,
2872 GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE,
2873 struct GNUNET_MessageHeader,
2875 GNUNET_MQ_hd_fixed_size (peer_push,
2876 GNUNET_MESSAGE_TYPE_RPS_PP_PUSH,
2877 struct GNUNET_MessageHeader,
2879 GNUNET_MQ_hd_fixed_size (peer_pull_request,
2880 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
2881 struct GNUNET_MessageHeader,
2883 GNUNET_MQ_hd_var_size (peer_pull_reply,
2884 GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY,
2885 struct GNUNET_RPS_P2P_PullReplyMessage,
2887 GNUNET_MQ_handler_end ()
2891 GNUNET_CADET_open_port (cadet_handle,
2893 &handle_inbound_channel, /* Connect handler */
2895 NULL, /* WindowSize handler */
2896 &cleanup_destroyed_channel, /* Disconnect handler */
2898 if (NULL == sub->cadet_port)
2900 LOG (GNUNET_ERROR_TYPE_ERROR,
2901 "Cadet port `%s' is already in use.\n",
2902 GNUNET_APPLICATION_PORT_RPS);
2906 /* Set up general data structure to keep track about peers */
2907 sub->valid_peers = GNUNET_CONTAINER_multipeermap_create (4, GNUNET_NO);
2909 GNUNET_CONFIGURATION_get_value_filename (cfg,
2911 "FILENAME_VALID_PEERS",
2912 &sub->filename_valid_peers))
2914 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
2916 "FILENAME_VALID_PEERS");
2918 if (0 != strncmp ("DISABLE", sub->filename_valid_peers, 7))
2920 char *tmp_filename_valid_peers;
2923 GNUNET_snprintf (str_hash,
2925 GNUNET_h2s_full (hash));
2926 tmp_filename_valid_peers = sub->filename_valid_peers;
2927 GNUNET_asprintf (&sub->filename_valid_peers,
2929 tmp_filename_valid_peers,
2931 GNUNET_free (tmp_filename_valid_peers);
2933 sub->peer_map = GNUNET_CONTAINER_multipeermap_create (4, GNUNET_NO);
2935 /* Set up the sampler */
2936 sub->sampler_size_est_min = sampler_size;
2937 sub->sampler_size_est_need = sampler_size;;
2938 LOG (GNUNET_ERROR_TYPE_DEBUG, "MINSIZE is %u\n", sub->sampler_size_est_min);
2939 GNUNET_assert (0 != round_interval.rel_value_us);
2940 sub->round_interval = round_interval;
2941 sub->sampler = RPS_sampler_init (sampler_size,
2944 /* Logging of internals */
2946 sub->file_name_view_log = store_prefix_file_name (&own_identity, "view");
2947 #endif /* TO_FILE_FULL */
2950 sub->file_name_observed_log = store_prefix_file_name (&own_identity,
2952 #endif /* TO_FILE_FULL */
2953 sub->num_observed_peers = 0;
2954 sub->observed_unique_peers = GNUNET_CONTAINER_multipeermap_create (1,
2956 #endif /* TO_FILE */
2958 /* Set up data structures for gossip */
2959 sub->push_map = CustomPeerMap_create (4);
2960 sub->pull_map = CustomPeerMap_create (4);
2961 sub->view_size_est_min = sampler_size;;
2962 sub->view = View_create (sub->view_size_est_min);
2965 GNUNET_STATISTICS_set (stats,
2967 sub->view_size_est_min,
2971 /* Start executing rounds */
2972 sub->do_round_task = GNUNET_SCHEDULER_add_now (&do_round, sub);
2980 * @brief Write all numbers in the given array into the given file
2982 * Single numbers devided by a newline
2984 * @param hist_array[] the array to dump
2985 * @param file_name file to dump into
2988 write_histogram_to_file (const uint32_t hist_array[],
2989 const char *file_name)
2991 char collect_str[SIZE_DUMP_FILE + 1] = "";
2992 char *recv_str_iter;
2993 char *file_name_full;
2995 recv_str_iter = collect_str;
2996 file_name_full = store_prefix_file_name (&own_identity,
2998 for (uint32_t i = 0; i < HISTOGRAM_FILE_SLOTS; i++)
3000 char collect_str_tmp[8];
3002 GNUNET_snprintf (collect_str_tmp,
3003 sizeof(collect_str_tmp),
3006 recv_str_iter = stpncpy (recv_str_iter,
3010 (void) stpcpy (recv_str_iter,
3012 LOG (GNUNET_ERROR_TYPE_DEBUG,
3013 "Writing push stats to disk\n");
3014 to_file_w_len (file_name_full,
3017 GNUNET_free (file_name_full);
3019 #endif /* TO_FILE */
3023 * @brief Destroy Sub.
3025 * @param sub Sub to destroy
3028 destroy_sub (struct Sub *sub)
3030 GNUNET_assert (NULL != sub);
3031 GNUNET_assert (NULL != sub->do_round_task);
3032 GNUNET_SCHEDULER_cancel (sub->do_round_task);
3033 sub->do_round_task = NULL;
3035 /* Disconnect from cadet */
3036 GNUNET_CADET_close_port (sub->cadet_port);
3037 sub->cadet_port = NULL;
3039 /* Clean up data structures for peers */
3040 RPS_sampler_destroy (sub->sampler);
3041 sub->sampler = NULL;
3042 View_destroy (sub->view);
3044 CustomPeerMap_destroy (sub->push_map);
3045 sub->push_map = NULL;
3046 CustomPeerMap_destroy (sub->pull_map);
3047 sub->pull_map = NULL;
3048 peers_terminate (sub);
3050 /* Free leftover data structures */
3052 GNUNET_free (sub->file_name_view_log);
3053 sub->file_name_view_log = NULL;
3054 #endif /* TO_FILE_FULL */
3057 GNUNET_free (sub->file_name_observed_log);
3058 sub->file_name_observed_log = NULL;
3059 #endif /* TO_FILE_FULL */
3061 /* Write push frequencies to disk */
3062 write_histogram_to_file (sub->push_recv,
3065 /* Write push deltas to disk */
3066 write_histogram_to_file (sub->push_delta,
3069 /* Write pull delays to disk */
3070 write_histogram_to_file (sub->pull_delays,
3073 GNUNET_CONTAINER_multipeermap_destroy (sub->observed_unique_peers);
3074 sub->observed_unique_peers = NULL;
3075 #endif /* TO_FILE */
3081 /***********************************************************************
3083 ***********************************************************************/
3086 /***********************************************************************
3088 ***********************************************************************/
3091 * @brief Callback on initialisation of Core.
3093 * @param cls - unused
3094 * @param my_identity - unused
3097 core_init (void *cls,
3098 const struct GNUNET_PeerIdentity *my_identity)
3103 map_single_hop = GNUNET_CONTAINER_multipeermap_create (4, GNUNET_NO);
3108 * @brief Callback for core.
3109 * Method called whenever a given peer connects.
3111 * @param cls closure - unused
3112 * @param peer peer identity this notification is about
3113 * @return closure given to #core_disconnects as peer_cls
3116 core_connects (void *cls,
3117 const struct GNUNET_PeerIdentity *peer,
3118 struct GNUNET_MQ_Handle *mq)
3123 GNUNET_assert (GNUNET_YES ==
3124 GNUNET_CONTAINER_multipeermap_put (map_single_hop,
3127 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
3133 * @brief Callback for core.
3134 * Method called whenever a peer disconnects.
3136 * @param cls closure - unused
3137 * @param peer peer identity this notification is about
3138 * @param peer_cls closure given in #core_connects - unused
3141 core_disconnects (void *cls,
3142 const struct GNUNET_PeerIdentity *peer,
3148 GNUNET_CONTAINER_multipeermap_remove_all (map_single_hop, peer);
3151 /***********************************************************************
3153 ***********************************************************************/
3157 * @brief Destroy the context for a (connected) client
3159 * @param cli_ctx Context to destroy
3162 destroy_cli_ctx (struct ClientContext *cli_ctx)
3164 GNUNET_assert (NULL != cli_ctx);
3165 GNUNET_CONTAINER_DLL_remove (cli_ctx_head,
3168 if (NULL != cli_ctx->sub)
3170 destroy_sub (cli_ctx->sub);
3171 cli_ctx->sub = NULL;
3173 GNUNET_free (cli_ctx);
3178 * @brief Update sizes in sampler and view on estimate update from nse service
3181 * @param logestimate the log(Base 2) value of the current network size estimate
3182 * @param std_dev standard deviation for the estimate
3185 adapt_sizes (struct Sub *sub, double logestimate, double std_dev)
3189 // double scale; // TODO this might go gloabal/config
3191 LOG (GNUNET_ERROR_TYPE_DEBUG,
3192 "Received a ns estimate - logest: %f, std_dev: %f (old_size: %u)\n",
3193 logestimate, std_dev, RPS_sampler_get_size (sub->sampler));
3195 estimate = GNUNET_NSE_log_estimate_to_n (logestimate);
3196 // GNUNET_NSE_log_estimate_to_n (logestimate);
3197 estimate = pow (estimate, 1.0 / 3);
3198 // TODO add if std_dev is a number
3199 // estimate += (std_dev * scale);
3200 if (sub->view_size_est_min < ceil (estimate))
3202 LOG (GNUNET_ERROR_TYPE_DEBUG, "Changing estimate to %f\n", estimate);
3203 sub->sampler_size_est_need = estimate;
3204 sub->view_size_est_need = estimate;
3208 LOG (GNUNET_ERROR_TYPE_DEBUG, "Not using estimate %f\n", estimate);
3209 // sub->sampler_size_est_need = sub->view_size_est_min;
3210 sub->view_size_est_need = sub->view_size_est_min;
3214 GNUNET_STATISTICS_set (stats,
3216 sub->view_size_est_need,
3220 /* If the NSE has changed adapt the lists accordingly */
3221 resize_wrapper (sub->sampler, sub->sampler_size_est_need);
3222 View_change_len (sub->view, sub->view_size_est_need);
3227 * Function called by NSE.
3229 * Updates sizes of sampler list and view and adapt those lists
3232 * implements #GNUNET_NSE_Callback
3234 * @param cls Closure - unused
3235 * @param timestamp time when the estimate was received from the server (or created by the server)
3236 * @param logestimate the log(Base 2) value of the current network size estimate
3237 * @param std_dev standard deviation for the estimate
3240 nse_callback (void *cls,
3241 struct GNUNET_TIME_Absolute timestamp,
3242 double logestimate, double std_dev)
3246 struct ClientContext *cli_ctx_iter;
3248 adapt_sizes (msub, logestimate, std_dev);
3249 for (cli_ctx_iter = cli_ctx_head;
3250 NULL != cli_ctx_iter;
3251 cli_ctx_iter = cli_ctx_iter->next)
3253 if (NULL != cli_ctx_iter->sub)
3255 adapt_sizes (cli_ctx_iter->sub, logestimate, std_dev);
3262 * @brief This function is called, when the client seeds peers.
3263 * It verifies that @a msg is well-formed.
3265 * @param cls the closure (#ClientContext)
3266 * @param msg the message
3267 * @return #GNUNET_OK if @a msg is well-formed
3268 * #GNUNET_SYSERR otherwise
3271 check_client_seed (void *cls, const struct GNUNET_RPS_CS_SeedMessage *msg)
3273 struct ClientContext *cli_ctx = cls;
3274 uint16_t msize = ntohs (msg->header.size);
3275 uint32_t num_peers = ntohl (msg->num_peers);
3277 msize -= sizeof(struct GNUNET_RPS_CS_SeedMessage);
3278 if ((msize / sizeof(struct GNUNET_PeerIdentity) != num_peers) ||
3279 (msize % sizeof(struct GNUNET_PeerIdentity) != 0))
3281 LOG (GNUNET_ERROR_TYPE_ERROR,
3282 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
3283 ntohl (msg->num_peers),
3284 (msize / sizeof(struct GNUNET_PeerIdentity)));
3286 GNUNET_SERVICE_client_drop (cli_ctx->client);
3287 return GNUNET_SYSERR;
3294 * Handle seed from the client.
3296 * @param cls closure
3297 * @param message the actual message
3300 handle_client_seed (void *cls,
3301 const struct GNUNET_RPS_CS_SeedMessage *msg)
3303 struct ClientContext *cli_ctx = cls;
3304 struct GNUNET_PeerIdentity *peers;
3308 num_peers = ntohl (msg->num_peers);
3309 peers = (struct GNUNET_PeerIdentity *) &msg[1];
3311 LOG (GNUNET_ERROR_TYPE_DEBUG,
3312 "Client seeded peers:\n");
3313 print_peer_list (peers, num_peers);
3315 for (i = 0; i < num_peers; i++)
3317 LOG (GNUNET_ERROR_TYPE_DEBUG,
3318 "Updating samplers with seed %" PRIu32 ": %s\n",
3320 GNUNET_i2s (&peers[i]));
3323 got_peer (msub, &peers[i]); /* Condition needed? */
3324 if (NULL != cli_ctx->sub)
3325 got_peer (cli_ctx->sub, &peers[i]);
3327 GNUNET_SERVICE_client_continue (cli_ctx->client);
3332 * Handle RPS request from the client.
3334 * @param cls Client context
3335 * @param message Message containing the numer of updates the client wants to
3339 handle_client_view_request (void *cls,
3340 const struct GNUNET_RPS_CS_DEBUG_ViewRequest *msg)
3342 struct ClientContext *cli_ctx = cls;
3343 uint64_t num_updates;
3345 num_updates = ntohl (msg->num_updates);
3347 LOG (GNUNET_ERROR_TYPE_DEBUG,
3348 "Client requested %" PRIu64 " updates of view.\n",
3351 GNUNET_assert (NULL != cli_ctx);
3352 cli_ctx->view_updates_left = num_updates;
3353 send_view (cli_ctx, NULL, 0);
3354 GNUNET_SERVICE_client_continue (cli_ctx->client);
3359 * @brief Handle the cancellation of the view updates.
3361 * @param cls The client context
3365 handle_client_view_cancel (void *cls,
3366 const struct GNUNET_MessageHeader *msg)
3368 struct ClientContext *cli_ctx = cls;
3372 LOG (GNUNET_ERROR_TYPE_DEBUG,
3373 "Client does not want to receive updates of view any more.\n");
3375 GNUNET_assert (NULL != cli_ctx);
3376 cli_ctx->view_updates_left = 0;
3377 GNUNET_SERVICE_client_continue (cli_ctx->client);
3378 if (GNUNET_YES == cli_ctx->stream_update)
3380 destroy_cli_ctx (cli_ctx);
3386 * Handle RPS request for biased stream from the client.
3388 * @param cls Client context
3389 * @param message unused
3392 handle_client_stream_request (void *cls,
3394 GNUNET_RPS_CS_DEBUG_StreamRequest *msg)
3396 struct ClientContext *cli_ctx = cls;
3400 LOG (GNUNET_ERROR_TYPE_DEBUG,
3401 "Client requested peers from biased stream.\n");
3402 cli_ctx->stream_update = GNUNET_YES;
3404 GNUNET_assert (NULL != cli_ctx);
3405 GNUNET_SERVICE_client_continue (cli_ctx->client);
3410 * @brief Handles the cancellation of the stream of biased peer ids
3412 * @param cls The client context
3416 handle_client_stream_cancel (void *cls,
3417 const struct GNUNET_MessageHeader *msg)
3419 struct ClientContext *cli_ctx = cls;
3423 LOG (GNUNET_ERROR_TYPE_DEBUG,
3424 "Client canceled receiving peers from biased stream.\n");
3425 cli_ctx->stream_update = GNUNET_NO;
3427 GNUNET_assert (NULL != cli_ctx);
3428 GNUNET_SERVICE_client_continue (cli_ctx->client);
3433 * @brief Create and start a Sub.
3435 * @param cls Closure - unused
3436 * @param msg Message containing the necessary information
3439 handle_client_start_sub (void *cls,
3440 const struct GNUNET_RPS_CS_SubStartMessage *msg)
3442 struct ClientContext *cli_ctx = cls;
3444 LOG (GNUNET_ERROR_TYPE_DEBUG, "Client requested start of a new sub.\n");
3445 if ((NULL != cli_ctx->sub)&&
3446 (0 != memcmp (&cli_ctx->sub->hash,
3448 sizeof(struct GNUNET_HashCode))) )
3450 LOG (GNUNET_ERROR_TYPE_WARNING,
3451 "Already have a Sub with different share for this client. Remove old one, add new.\n");
3452 destroy_sub (cli_ctx->sub);
3453 cli_ctx->sub = NULL;
3455 cli_ctx->sub = new_sub (&msg->hash,
3456 msub->sampler_size_est_min, // TODO make api input?
3457 GNUNET_TIME_relative_ntoh (msg->round_interval));
3458 GNUNET_SERVICE_client_continue (cli_ctx->client);
3463 * @brief Destroy the Sub
3465 * @param cls Closure - unused
3466 * @param msg Message containing the hash that identifies the Sub
3469 handle_client_stop_sub (void *cls,
3470 const struct GNUNET_RPS_CS_SubStopMessage *msg)
3472 struct ClientContext *cli_ctx = cls;
3474 GNUNET_assert (NULL != cli_ctx->sub);
3475 if (0 != memcmp (&cli_ctx->sub->hash, &msg->hash, sizeof(struct
3478 LOG (GNUNET_ERROR_TYPE_WARNING,
3479 "Share of current sub and request differ!\n");
3481 destroy_sub (cli_ctx->sub);
3482 cli_ctx->sub = NULL;
3483 GNUNET_SERVICE_client_continue (cli_ctx->client);
3488 * Handle a CHECK_LIVE message from another peer.
3490 * This does nothing. But without calling #GNUNET_CADET_receive_done()
3491 * the channel is blocked for all other communication.
3493 * @param cls Closure - Context of channel
3494 * @param msg Message - unused
3497 handle_peer_check (void *cls,
3498 const struct GNUNET_MessageHeader *msg)
3500 const struct ChannelCtx *channel_ctx = cls;
3501 const struct GNUNET_PeerIdentity *peer = &channel_ctx->peer_ctx->peer_id;
3505 LOG (GNUNET_ERROR_TYPE_DEBUG,
3506 "Received CHECK_LIVE (%s)\n", GNUNET_i2s (peer));
3507 if (channel_ctx->peer_ctx->sub == msub)
3509 GNUNET_STATISTICS_update (stats,
3510 "# pending online checks",
3515 GNUNET_CADET_receive_done (channel_ctx->channel);
3520 * Handle a PUSH message from another peer.
3522 * Check the proof of work and store the PeerID
3523 * in the temporary list for pushed PeerIDs.
3525 * @param cls Closure - Context of channel
3526 * @param msg Message - unused
3529 handle_peer_push (void *cls,
3530 const struct GNUNET_MessageHeader *msg)
3532 const struct ChannelCtx *channel_ctx = cls;
3533 const struct GNUNET_PeerIdentity *peer = &channel_ctx->peer_ctx->peer_id;
3537 // (check the proof of work (?))
3539 LOG (GNUNET_ERROR_TYPE_DEBUG,
3540 "Received PUSH (%s)\n",
3542 if (channel_ctx->peer_ctx->sub == msub)
3544 GNUNET_STATISTICS_update (stats, "# push message received", 1, GNUNET_NO);
3545 if ((NULL != map_single_hop) &&
3546 (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (map_single_hop,
3549 GNUNET_STATISTICS_update (stats,
3550 "# push message received (multi-hop peer)",
3556 #if ENABLE_MALICIOUS
3557 struct AttackedPeer *tmp_att_peer;
3559 if ((1 == mal_type) ||
3561 { /* Try to maximise representation */
3562 tmp_att_peer = GNUNET_new (struct AttackedPeer);
3563 tmp_att_peer->peer_id = *peer;
3564 if (NULL == att_peer_set)
3565 att_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
3566 if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
3569 GNUNET_CONTAINER_DLL_insert (att_peers_head,
3572 add_peer_array_to_set (peer, 1, att_peer_set);
3576 GNUNET_free (tmp_att_peer);
3581 else if (2 == mal_type)
3583 /* We attack one single well-known peer - simply ignore */
3585 #endif /* ENABLE_MALICIOUS */
3587 /* Add the sending peer to the push_map */
3588 CustomPeerMap_put (channel_ctx->peer_ctx->sub->push_map, peer);
3590 GNUNET_break_op (check_peer_known (channel_ctx->peer_ctx->sub->peer_map,
3591 &channel_ctx->peer_ctx->peer_id));
3592 GNUNET_CADET_receive_done (channel_ctx->channel);
3597 * Handle PULL REQUEST request message from another peer.
3599 * Reply with the view of PeerIDs.
3601 * @param cls Closure - Context of channel
3602 * @param msg Message - unused
3605 handle_peer_pull_request (void *cls,
3606 const struct GNUNET_MessageHeader *msg)
3608 const struct ChannelCtx *channel_ctx = cls;
3609 struct PeerContext *peer_ctx = channel_ctx->peer_ctx;
3610 const struct GNUNET_PeerIdentity *peer = &peer_ctx->peer_id;
3611 const struct GNUNET_PeerIdentity *view_array;
3615 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REQUEST (%s)\n", GNUNET_i2s (
3617 if (peer_ctx->sub == msub)
3619 GNUNET_STATISTICS_update (stats,
3620 "# pull request message received",
3623 if ((NULL != map_single_hop) &&
3624 (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (map_single_hop,
3625 &peer_ctx->peer_id)))
3627 GNUNET_STATISTICS_update (stats,
3628 "# pull request message received (multi-hop peer)",
3634 #if ENABLE_MALICIOUS
3637 { /* Try to maximise representation */
3638 send_pull_reply (peer_ctx, mal_peers, num_mal_peers);
3641 else if (2 == mal_type)
3642 { /* Try to partition network */
3643 if (0 == GNUNET_memcmp (&attacked_peer, peer))
3645 send_pull_reply (peer_ctx, mal_peers, num_mal_peers);
3648 #endif /* ENABLE_MALICIOUS */
3650 GNUNET_break_op (check_peer_known (channel_ctx->peer_ctx->sub->peer_map,
3651 &channel_ctx->peer_ctx->peer_id));
3652 GNUNET_CADET_receive_done (channel_ctx->channel);
3653 view_array = View_get_as_array (channel_ctx->peer_ctx->sub->view);
3654 send_pull_reply (peer_ctx,
3656 View_size (channel_ctx->peer_ctx->sub->view));
3661 * Check whether we sent a corresponding request and
3662 * whether this reply is the first one.
3664 * @param cls Closure - Context of channel
3665 * @param msg Message containing the replied peers
3668 check_peer_pull_reply (void *cls,
3669 const struct GNUNET_RPS_P2P_PullReplyMessage *msg)
3671 struct ChannelCtx *channel_ctx = cls;
3672 struct PeerContext *sender_ctx = channel_ctx->peer_ctx;
3674 if (sizeof(struct GNUNET_RPS_P2P_PullReplyMessage) > ntohs (msg->header.size))
3676 GNUNET_break_op (0);
3677 return GNUNET_SYSERR;
3680 if ((ntohs (msg->header.size) - sizeof(struct
3681 GNUNET_RPS_P2P_PullReplyMessage))
3682 / sizeof(struct GNUNET_PeerIdentity) != ntohl (msg->num_peers))
3684 LOG (GNUNET_ERROR_TYPE_ERROR,
3685 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
3686 ntohl (msg->num_peers),
3687 (ntohs (msg->header.size) - sizeof(struct
3688 GNUNET_RPS_P2P_PullReplyMessage))
3689 / sizeof(struct GNUNET_PeerIdentity));
3690 GNUNET_break_op (0);
3691 return GNUNET_SYSERR;
3694 if (GNUNET_YES != check_peer_flag (sender_ctx->sub->peer_map,
3695 &sender_ctx->peer_id,
3696 Peers_PULL_REPLY_PENDING))
3698 LOG (GNUNET_ERROR_TYPE_WARNING,
3699 "Received a pull reply from a peer (%s) we didn't request one from!\n",
3700 GNUNET_i2s (&sender_ctx->peer_id));
3701 if (sender_ctx->sub == msub)
3703 GNUNET_STATISTICS_update (stats,
3704 "# unrequested pull replies",
3714 * Handle PULL REPLY message from another peer.
3716 * @param cls Closure
3717 * @param msg The message header
3720 handle_peer_pull_reply (void *cls,
3721 const struct GNUNET_RPS_P2P_PullReplyMessage *msg)
3723 const struct ChannelCtx *channel_ctx = cls;
3724 const struct GNUNET_PeerIdentity *sender = &channel_ctx->peer_ctx->peer_id;
3725 const struct GNUNET_PeerIdentity *peers;
3726 struct Sub *sub = channel_ctx->peer_ctx->sub;
3729 #if ENABLE_MALICIOUS
3730 struct AttackedPeer *tmp_att_peer;
3731 #endif /* ENABLE_MALICIOUS */
3733 sub->pull_delays[sub->num_rounds - channel_ctx->peer_ctx->round_pull_req]++;
3734 LOG (GNUNET_ERROR_TYPE_DEBUG, "Received PULL REPLY (%s)\n", GNUNET_i2s (
3736 if (channel_ctx->peer_ctx->sub == msub)
3738 GNUNET_STATISTICS_update (stats,
3739 "# pull reply messages received",
3742 if ((NULL != map_single_hop) &&
3743 (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (map_single_hop,
3745 peer_ctx->peer_id)) )
3747 GNUNET_STATISTICS_update (stats,
3748 "# pull reply messages received (multi-hop peer)",
3754 #if ENABLE_MALICIOUS
3755 // We shouldn't even receive pull replies as we're not sending
3759 #endif /* ENABLE_MALICIOUS */
3761 /* Do actual logic */
3762 peers = (const struct GNUNET_PeerIdentity *) &msg[1];
3764 LOG (GNUNET_ERROR_TYPE_DEBUG,
3765 "PULL REPLY received, got following %u peers:\n",
3766 ntohl (msg->num_peers));
3768 for (i = 0; i < ntohl (msg->num_peers); i++)
3770 LOG (GNUNET_ERROR_TYPE_DEBUG,
3773 GNUNET_i2s (&peers[i]));
3775 #if ENABLE_MALICIOUS
3776 if ((NULL != att_peer_set) &&
3777 ((1 == mal_type) ||(3 == mal_type) ))
3778 { /* Add attacked peer to local list */
3779 // TODO check if we sent a request and this was the first reply
3780 if ((GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
3782 &&(GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (mal_peer_set,
3785 tmp_att_peer = GNUNET_new (struct AttackedPeer);
3786 tmp_att_peer->peer_id = peers[i];
3787 GNUNET_CONTAINER_DLL_insert (att_peers_head,
3790 add_peer_array_to_set (&peers[i], 1, att_peer_set);
3794 #endif /* ENABLE_MALICIOUS */
3795 /* Make sure we 'know' about this peer */
3796 (void) insert_peer (channel_ctx->peer_ctx->sub,
3799 if (GNUNET_YES == check_peer_valid (channel_ctx->peer_ctx->sub->valid_peers,
3802 CustomPeerMap_put (channel_ctx->peer_ctx->sub->pull_map,
3807 schedule_operation (channel_ctx->peer_ctx,
3809 channel_ctx->peer_ctx->sub); /* cls */
3810 (void) issue_peer_online_check (channel_ctx->peer_ctx->sub,
3815 UNSET_PEER_FLAG (get_peer_ctx (channel_ctx->peer_ctx->sub->peer_map,
3817 Peers_PULL_REPLY_PENDING);
3818 clean_peer (channel_ctx->peer_ctx->sub,
3821 GNUNET_break_op (check_peer_known (channel_ctx->peer_ctx->sub->peer_map,
3823 GNUNET_CADET_receive_done (channel_ctx->channel);
3828 * Compute a random delay.
3829 * A uniformly distributed value between mean + spread and mean - spread.
3831 * For example for mean 4 min and spread 2 the minimum is (4 min - (1/2 * 4 min))
3832 * It would return a random value between 2 and 6 min.
3834 * @param mean the mean time until the next round
3835 * @param spread the inverse amount of deviation from the mean
3837 static struct GNUNET_TIME_Relative
3838 compute_rand_delay (struct GNUNET_TIME_Relative mean,
3839 unsigned int spread)
3841 struct GNUNET_TIME_Relative half_interval;
3842 struct GNUNET_TIME_Relative ret;
3843 unsigned int rand_delay;
3844 unsigned int max_rand_delay;
3848 LOG (GNUNET_ERROR_TYPE_WARNING,
3849 "Not accepting spread of 0\n");
3853 GNUNET_assert (0 != mean.rel_value_us);
3855 /* Compute random time value between spread * mean and spread * mean */
3856 half_interval = GNUNET_TIME_relative_divide (mean, spread);
3858 max_rand_delay = GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us
3859 / mean.rel_value_us * (2 / spread);
3861 * Compute random value between (0 and 1) * round_interval
3862 * via multiplying round_interval with a 'fraction' (0 to value)/value
3864 rand_delay = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
3866 ret = GNUNET_TIME_relative_saturating_multiply (mean, rand_delay);
3867 ret = GNUNET_TIME_relative_divide (ret, max_rand_delay);
3868 ret = GNUNET_TIME_relative_add (ret, half_interval);
3870 if (GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us == ret.rel_value_us)
3871 LOG (GNUNET_ERROR_TYPE_WARNING,
3872 "Returning FOREVER_REL\n");
3879 * Send single pull request
3881 * @param peer_ctx Context to the peer to send request to
3884 send_pull_request (struct PeerContext *peer_ctx)
3886 struct GNUNET_MQ_Envelope *ev;
3888 GNUNET_assert (GNUNET_NO == check_peer_flag (peer_ctx->sub->peer_map,
3890 Peers_PULL_REPLY_PENDING));
3891 SET_PEER_FLAG (peer_ctx,
3892 Peers_PULL_REPLY_PENDING);
3893 peer_ctx->round_pull_req = peer_ctx->sub->num_rounds;
3895 LOG (GNUNET_ERROR_TYPE_DEBUG,
3896 "Going to send PULL REQUEST to peer %s.\n",
3897 GNUNET_i2s (&peer_ctx->peer_id));
3899 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST);
3900 send_message (peer_ctx,
3905 GNUNET_STATISTICS_update (stats,
3906 "# pull request send issued",
3909 if ((NULL != map_single_hop) &&
3910 (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (map_single_hop,
3911 &peer_ctx->peer_id)))
3913 GNUNET_STATISTICS_update (stats,
3914 "# pull request send issued (multi-hop peer)",
3925 * @param peer_ctx Context of peer to send push to
3928 send_push (struct PeerContext *peer_ctx)
3930 struct GNUNET_MQ_Envelope *ev;
3932 LOG (GNUNET_ERROR_TYPE_DEBUG,
3933 "Going to send PUSH to peer %s.\n",
3934 GNUNET_i2s (&peer_ctx->peer_id));
3936 ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_PUSH);
3937 send_message (peer_ctx, ev, "PUSH");
3940 GNUNET_STATISTICS_update (stats,
3941 "# push send issued",
3944 if ((NULL != map_single_hop) &&
3945 (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (map_single_hop,
3946 &peer_ctx->peer_id)))
3948 GNUNET_STATISTICS_update (stats,
3949 "# push send issued (multi-hop peer)",
3957 #if ENABLE_MALICIOUS
3961 * @brief This function is called, when the client tells us to act malicious.
3962 * It verifies that @a msg is well-formed.
3964 * @param cls the closure (#ClientContext)
3965 * @param msg the message
3966 * @return #GNUNET_OK if @a msg is well-formed
3969 check_client_act_malicious (void *cls,
3970 const struct GNUNET_RPS_CS_ActMaliciousMessage *msg)
3972 struct ClientContext *cli_ctx = cls;
3973 uint16_t msize = ntohs (msg->header.size);
3974 uint32_t num_peers = ntohl (msg->num_peers);
3976 msize -= sizeof(struct GNUNET_RPS_CS_ActMaliciousMessage);
3977 if ((msize / sizeof(struct GNUNET_PeerIdentity) != num_peers) ||
3978 (msize % sizeof(struct GNUNET_PeerIdentity) != 0))
3980 LOG (GNUNET_ERROR_TYPE_ERROR,
3981 "message says it sends %" PRIu32 " peers, have space for %lu peers\n",
3982 ntohl (msg->num_peers),
3983 (msize / sizeof(struct GNUNET_PeerIdentity)));
3985 GNUNET_SERVICE_client_drop (cli_ctx->client);
3986 return GNUNET_SYSERR;
3992 * Turn RPS service to act malicious.
3994 * @param cls Closure
3995 * @param client The client that sent the message
3996 * @param msg The message header
3999 handle_client_act_malicious (void *cls,
4001 GNUNET_RPS_CS_ActMaliciousMessage *msg)
4003 struct ClientContext *cli_ctx = cls;
4004 struct GNUNET_PeerIdentity *peers;
4005 uint32_t num_mal_peers_sent;
4006 uint32_t num_mal_peers_old;
4007 struct Sub *sub = cli_ctx->sub;
4011 /* Do actual logic */
4012 peers = (struct GNUNET_PeerIdentity *) &msg[1];
4013 mal_type = ntohl (msg->type);
4014 if (NULL == mal_peer_set)
4015 mal_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
4017 LOG (GNUNET_ERROR_TYPE_DEBUG,
4018 "Now acting malicious type %" PRIu32 ", got %" PRIu32 " peers.\n",
4020 ntohl (msg->num_peers));
4023 { /* Try to maximise representation */
4024 /* Add other malicious peers to those we already know */
4026 num_mal_peers_sent = ntohl (msg->num_peers);
4027 num_mal_peers_old = num_mal_peers;
4028 GNUNET_array_grow (mal_peers,
4030 num_mal_peers + num_mal_peers_sent);
4031 GNUNET_memcpy (&mal_peers[num_mal_peers_old],
4033 num_mal_peers_sent * sizeof(struct GNUNET_PeerIdentity));
4035 /* Add all mal peers to mal_peer_set */
4036 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
4040 /* Substitute do_round () with do_mal_round () */
4041 GNUNET_assert (NULL != sub->do_round_task);
4042 GNUNET_SCHEDULER_cancel (sub->do_round_task);
4043 sub->do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, sub);
4046 else if ((2 == mal_type) ||
4048 { /* Try to partition the network */
4049 /* Add other malicious peers to those we already know */
4051 num_mal_peers_sent = ntohl (msg->num_peers) - 1;
4052 num_mal_peers_old = num_mal_peers;
4053 GNUNET_assert (GNUNET_MAX_MALLOC_CHECKED > num_mal_peers_sent);
4054 GNUNET_array_grow (mal_peers,
4056 num_mal_peers + num_mal_peers_sent);
4057 if ((NULL != mal_peers) &&
4058 (0 != num_mal_peers) )
4060 GNUNET_memcpy (&mal_peers[num_mal_peers_old],
4062 num_mal_peers_sent * sizeof(struct GNUNET_PeerIdentity));
4064 /* Add all mal peers to mal_peer_set */
4065 add_peer_array_to_set (&mal_peers[num_mal_peers_old],
4070 /* Store the one attacked peer */
4071 GNUNET_memcpy (&attacked_peer,
4072 &msg->attacked_peer,
4073 sizeof(struct GNUNET_PeerIdentity));
4074 /* Set the flag of the attacked peer to valid to avoid problems */
4075 if (GNUNET_NO == check_peer_known (sub->peer_map, &attacked_peer))
4077 (void) issue_peer_online_check (sub, &attacked_peer);
4080 LOG (GNUNET_ERROR_TYPE_DEBUG,
4081 "Attacked peer is %s\n",
4082 GNUNET_i2s (&attacked_peer));
4084 /* Substitute do_round () with do_mal_round () */
4085 if (NULL != sub->do_round_task)
4087 /* Probably in shutdown */
4088 GNUNET_SCHEDULER_cancel (sub->do_round_task);
4089 sub->do_round_task = GNUNET_SCHEDULER_add_now (&do_mal_round, sub);
4092 else if (0 == mal_type)
4093 { /* Stop acting malicious */
4094 GNUNET_array_grow (mal_peers, num_mal_peers, 0);
4096 /* Substitute do_mal_round () with do_round () */
4097 GNUNET_SCHEDULER_cancel (sub->do_round_task);
4098 sub->do_round_task = GNUNET_SCHEDULER_add_now (&do_round, sub);
4103 GNUNET_SERVICE_client_continue (cli_ctx->client);
4105 GNUNET_SERVICE_client_continue (cli_ctx->client);
4110 * Send out PUSHes and PULLs maliciously.
4112 * This is executed regylary.
4114 * @param cls Closure - Sub
4117 do_mal_round (void *cls)
4119 uint32_t num_pushes;
4121 struct GNUNET_TIME_Relative time_next_round;
4122 struct AttackedPeer *tmp_att_peer;
4123 struct Sub *sub = cls;
4125 LOG (GNUNET_ERROR_TYPE_DEBUG,
4126 "Going to execute next round maliciously type %" PRIu32 ".\n",
4128 sub->do_round_task = NULL;
4129 GNUNET_assert (mal_type <= 3);
4130 /* Do malicious actions */
4132 { /* Try to maximise representation */
4133 /* The maximum of pushes we're going to send this round */
4134 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit,
4135 num_attacked_peers),
4136 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
4138 LOG (GNUNET_ERROR_TYPE_DEBUG,
4139 "Going to send %" PRIu32 " pushes\n",
4142 /* Send PUSHes to attacked peers */
4143 for (i = 0; i < num_pushes; i++)
4145 if (att_peers_tail == att_peer_index)
4146 att_peer_index = att_peers_head;
4148 att_peer_index = att_peer_index->next;
4150 send_push (get_peer_ctx (sub->peer_map, &att_peer_index->peer_id));
4153 /* Send PULLs to some peers to learn about additional peers to attack */
4154 tmp_att_peer = att_peer_index;
4155 for (i = 0; i < num_pushes * alpha; i++)
4157 if (att_peers_tail == tmp_att_peer)
4158 tmp_att_peer = att_peers_head;
4160 att_peer_index = tmp_att_peer->next;
4162 send_pull_request (get_peer_ctx (sub->peer_map, &tmp_att_peer->peer_id));
4167 else if (2 == mal_type)
4169 * Try to partition the network
4170 * Send as many pushes to the attacked peer as possible
4171 * That is one push per round as it will ignore more.
4173 (void) issue_peer_online_check (sub, &attacked_peer);
4174 if (GNUNET_YES == check_peer_flag (sub->peer_map,
4177 send_push (get_peer_ctx (sub->peer_map, &attacked_peer));
4182 { /* Combined attack */
4183 /* Send PUSH to attacked peers */
4184 if (GNUNET_YES == check_peer_known (sub->peer_map, &attacked_peer))
4186 (void) issue_peer_online_check (sub, &attacked_peer);
4187 if (GNUNET_YES == check_peer_flag (sub->peer_map,
4191 LOG (GNUNET_ERROR_TYPE_DEBUG,
4192 "Goding to send push to attacked peer (%s)\n",
4193 GNUNET_i2s (&attacked_peer));
4194 send_push (get_peer_ctx (sub->peer_map, &attacked_peer));
4197 (void) issue_peer_online_check (sub, &attacked_peer);
4199 /* The maximum of pushes we're going to send this round */
4200 num_pushes = GNUNET_MIN (GNUNET_MIN (push_limit - 1,
4201 num_attacked_peers),
4202 GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE);
4204 LOG (GNUNET_ERROR_TYPE_DEBUG,
4205 "Going to send %" PRIu32 " pushes\n",
4208 for (i = 0; i < num_pushes; i++)
4210 if (att_peers_tail == att_peer_index)
4211 att_peer_index = att_peers_head;
4213 att_peer_index = att_peer_index->next;
4215 send_push (get_peer_ctx (sub->peer_map, &att_peer_index->peer_id));
4218 /* Send PULLs to some peers to learn about additional peers to attack */
4219 tmp_att_peer = att_peer_index;
4220 for (i = 0; i < num_pushes * alpha; i++)
4222 if (att_peers_tail == tmp_att_peer)
4223 tmp_att_peer = att_peers_head;
4225 att_peer_index = tmp_att_peer->next;
4227 send_pull_request (get_peer_ctx (sub->peer_map, &tmp_att_peer->peer_id));
4231 /* Schedule next round */
4232 time_next_round = compute_rand_delay (sub->round_interval, 2);
4234 GNUNET_assert (NULL == sub->do_round_task);
4235 sub->do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
4236 &do_mal_round, sub);
4237 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
4239 #endif /* ENABLE_MALICIOUS */
4243 * Send out PUSHes and PULLs, possibly update #view, samplers.
4245 * This is executed regylary.
4247 * @param cls Closure - Sub
4250 do_round (void *cls)
4253 const struct GNUNET_PeerIdentity *view_array;
4254 unsigned int *permut;
4255 unsigned int a_peers; /* Number of peers we send pushes to */
4256 unsigned int b_peers; /* Number of peers we send pull requests to */
4257 uint32_t first_border;
4258 uint32_t second_border;
4259 struct GNUNET_PeerIdentity peer;
4260 struct GNUNET_PeerIdentity *update_peer;
4261 struct Sub *sub = cls;
4264 LOG (GNUNET_ERROR_TYPE_DEBUG,
4265 "Going to execute next round.\n");
4268 GNUNET_STATISTICS_update (stats, "# rounds", 1, GNUNET_NO);
4270 sub->do_round_task = NULL;
4272 to_file (sub->file_name_view_log,
4273 "___ new round ___");
4274 #endif /* TO_FILE_FULL */
4275 view_array = View_get_as_array (sub->view);
4276 for (i = 0; i < View_size (sub->view); i++)
4278 LOG (GNUNET_ERROR_TYPE_DEBUG,
4279 "\t%s\n", GNUNET_i2s (&view_array[i]));
4281 to_file (sub->file_name_view_log,
4283 GNUNET_i2s_full (&view_array[i]));
4284 #endif /* TO_FILE_FULL */
4288 /* Send pushes and pull requests */
4289 if (0 < View_size (sub->view))
4291 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
4292 View_size (sub->view));
4295 a_peers = ceil (alpha * View_size (sub->view));
4297 LOG (GNUNET_ERROR_TYPE_DEBUG,
4298 "Going to send pushes to %u (ceil (%f * %u)) peers.\n",
4299 a_peers, alpha, View_size (sub->view));
4300 for (i = 0; i < a_peers; i++)
4302 peer = view_array[permut[i]];
4303 // FIXME if this fails schedule/loop this for later
4304 send_push (get_peer_ctx (sub->peer_map, &peer));
4307 /* Send PULL requests */
4308 b_peers = ceil (beta * View_size (sub->view));
4309 first_border = a_peers;
4310 second_border = a_peers + b_peers;
4311 if (second_border > View_size (sub->view))
4313 first_border = View_size (sub->view) - b_peers;
4314 second_border = View_size (sub->view);
4316 LOG (GNUNET_ERROR_TYPE_DEBUG,
4317 "Going to send pulls to %u (ceil (%f * %u)) peers.\n",
4318 b_peers, beta, View_size (sub->view));
4319 for (i = first_border; i < second_border; i++)
4321 peer = view_array[permut[i]];
4322 if (GNUNET_NO == check_peer_flag (sub->peer_map,
4324 Peers_PULL_REPLY_PENDING))
4325 { // FIXME if this fails schedule/loop this for later
4326 send_pull_request (get_peer_ctx (sub->peer_map, &peer));
4330 GNUNET_free (permut);
4336 /* TODO see how many peers are in push-/pull- list! */
4338 if ((CustomPeerMap_size (sub->push_map) <= alpha * sub->view_size_est_need) &&
4339 (0 < CustomPeerMap_size (sub->push_map)) &&
4340 (0 < CustomPeerMap_size (sub->pull_map)))
4341 { /* If conditions for update are fulfilled, update */
4342 LOG (GNUNET_ERROR_TYPE_DEBUG, "Update of the view.\n");
4344 uint32_t final_size;
4345 uint32_t peers_to_clean_size;
4346 struct GNUNET_PeerIdentity *peers_to_clean;
4348 peers_to_clean = NULL;
4349 peers_to_clean_size = 0;
4350 GNUNET_array_grow (peers_to_clean,
4351 peers_to_clean_size,
4352 View_size (sub->view));
4353 GNUNET_memcpy (peers_to_clean,
4355 View_size (sub->view) * sizeof(struct GNUNET_PeerIdentity));
4357 /* Seems like recreating is the easiest way of emptying the peermap */
4358 View_clear (sub->view);
4360 to_file (sub->file_name_view_log,
4362 #endif /* TO_FILE_FULL */
4364 first_border = GNUNET_MIN (ceil (alpha * sub->view_size_est_need),
4365 CustomPeerMap_size (sub->push_map));
4366 second_border = first_border
4367 + GNUNET_MIN (floor (beta * sub->view_size_est_need),
4368 CustomPeerMap_size (sub->pull_map));
4369 final_size = second_border
4370 + ceil ((1 - (alpha + beta)) * sub->view_size_est_need);
4371 LOG (GNUNET_ERROR_TYPE_DEBUG,
4372 "first border: %" PRIu32 ", second border: %" PRIu32 ", final size: %"
4378 /* Update view with peers received through PUSHes */
4379 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
4380 CustomPeerMap_size (sub->push_map));
4381 for (i = 0; i < first_border; i++)
4384 inserted = insert_in_view (sub,
4385 CustomPeerMap_get_peer_by_index (sub->push_map,
4387 if (GNUNET_OK == inserted)
4389 clients_notify_stream_peer (sub,
4391 CustomPeerMap_get_peer_by_index (
4392 sub->push_map, permut[i]));
4395 to_file (sub->file_name_view_log,
4397 GNUNET_i2s_full (&view_array[i]));
4398 #endif /* TO_FILE_FULL */
4399 // TODO change the peer_flags accordingly
4401 GNUNET_free (permut);
4404 /* Update view with peers received through PULLs */
4405 permut = GNUNET_CRYPTO_random_permute (GNUNET_CRYPTO_QUALITY_STRONG,
4406 CustomPeerMap_size (sub->pull_map));
4407 for (i = first_border; i < second_border; i++)
4410 inserted = insert_in_view (sub,
4411 CustomPeerMap_get_peer_by_index (sub->pull_map,
4416 if (GNUNET_OK == inserted)
4418 clients_notify_stream_peer (sub,
4420 CustomPeerMap_get_peer_by_index (
4426 to_file (sub->file_name_view_log,
4428 GNUNET_i2s_full (&view_array[i]));
4429 #endif /* TO_FILE_FULL */
4430 // TODO change the peer_flags accordingly
4432 GNUNET_free (permut);
4435 /* Update view with peers from history */
4436 RPS_sampler_get_n_rand_peers (sub->sampler,
4437 final_size - second_border,
4440 // TODO change the peer_flags accordingly
4442 for (i = 0; i < View_size (sub->view); i++)
4443 rem_from_list (&peers_to_clean, &peers_to_clean_size, &view_array[i]);
4445 /* Clean peers that were removed from the view */
4446 for (i = 0; i < peers_to_clean_size; i++)
4449 to_file (sub->file_name_view_log,
4451 GNUNET_i2s_full (&peers_to_clean[i]));
4452 #endif /* TO_FILE_FULL */
4453 clean_peer (sub, &peers_to_clean[i]);
4456 GNUNET_array_grow (peers_to_clean, peers_to_clean_size, 0);
4457 clients_notify_view_update (sub);
4461 LOG (GNUNET_ERROR_TYPE_DEBUG, "No update of the view.\n");
4464 GNUNET_STATISTICS_update (stats, "# rounds blocked", 1, GNUNET_NO);
4465 if ((CustomPeerMap_size (sub->push_map) > alpha
4466 * sub->view_size_est_need) &&
4467 ! (0 >= CustomPeerMap_size (sub->pull_map)))
4468 GNUNET_STATISTICS_update (stats, "# rounds blocked - too many pushes",
4470 if ((CustomPeerMap_size (sub->push_map) > alpha
4471 * sub->view_size_est_need) &&
4472 (0 >= CustomPeerMap_size (sub->pull_map)))
4473 GNUNET_STATISTICS_update (stats,
4474 "# rounds blocked - too many pushes, no pull replies",
4476 if ((0 >= CustomPeerMap_size (sub->push_map)) &&
4477 ! (0 >= CustomPeerMap_size (sub->pull_map)))
4478 GNUNET_STATISTICS_update (stats, "# rounds blocked - no pushes", 1,
4480 if ((0 >= CustomPeerMap_size (sub->push_map)) &&
4481 (0 >= CustomPeerMap_size (sub->pull_map)))
4482 GNUNET_STATISTICS_update (stats,
4483 "# rounds blocked - no pushes, no pull replies",
4485 if ((0 >= CustomPeerMap_size (sub->pull_map)) &&
4486 (CustomPeerMap_size (sub->push_map) > alpha
4487 * sub->view_size_est_need) &&
4488 (0 >= CustomPeerMap_size (sub->push_map)) )
4489 GNUNET_STATISTICS_update (stats, "# rounds blocked - no pull replies",
4493 // TODO independent of that also get some peers from CADET_get_peers()?
4494 if (CustomPeerMap_size (sub->push_map) < HISTOGRAM_FILE_SLOTS)
4496 sub->push_recv[CustomPeerMap_size (sub->push_map)]++;
4500 LOG (GNUNET_ERROR_TYPE_WARNING,
4501 "Push map size too big for histogram (%u, %u)\n",
4502 CustomPeerMap_size (sub->push_map),
4503 HISTOGRAM_FILE_SLOTS);
4505 // FIXME check bounds of histogram
4506 sub->push_delta[(int32_t) (CustomPeerMap_size (sub->push_map)
4507 - (alpha * sub->view_size_est_need))
4508 + (HISTOGRAM_FILE_SLOTS / 2)]++;
4511 GNUNET_STATISTICS_set (stats,
4512 "# peers in push map at end of round",
4513 CustomPeerMap_size (sub->push_map),
4515 GNUNET_STATISTICS_set (stats,
4516 "# peers in pull map at end of round",
4517 CustomPeerMap_size (sub->pull_map),
4519 GNUNET_STATISTICS_set (stats,
4520 "# peers in view at end of round",
4521 View_size (sub->view),
4523 GNUNET_STATISTICS_set (stats,
4524 "# expected pushes",
4525 alpha * sub->view_size_est_need,
4527 GNUNET_STATISTICS_set (stats,
4528 "delta expected - received pushes",
4529 CustomPeerMap_size (sub->push_map) - (alpha
4531 view_size_est_need),
4535 LOG (GNUNET_ERROR_TYPE_DEBUG,
4536 "Received %u pushes and %u pulls last round (alpha (%.2f) * view_size (sub->view%u) = %.2f)\n",
4537 CustomPeerMap_size (sub->push_map),
4538 CustomPeerMap_size (sub->pull_map),
4540 View_size (sub->view),
4541 alpha * View_size (sub->view));
4543 /* Update samplers */
4544 for (i = 0; i < CustomPeerMap_size (sub->push_map); i++)
4546 update_peer = CustomPeerMap_get_peer_by_index (sub->push_map, i);
4547 LOG (GNUNET_ERROR_TYPE_DEBUG,
4548 "Updating with peer %s from push list\n",
4549 GNUNET_i2s (update_peer));
4550 insert_in_sampler (sub, update_peer);
4551 clean_peer (sub, update_peer); /* This cleans only if it is not in the view */
4554 for (i = 0; i < CustomPeerMap_size (sub->pull_map); i++)
4556 LOG (GNUNET_ERROR_TYPE_DEBUG,
4557 "Updating with peer %s from pull list\n",
4558 GNUNET_i2s (CustomPeerMap_get_peer_by_index (sub->pull_map, i)));
4559 insert_in_sampler (sub, CustomPeerMap_get_peer_by_index (sub->pull_map, i));
4560 /* This cleans only if it is not in the view */
4561 clean_peer (sub, CustomPeerMap_get_peer_by_index (sub->pull_map, i));
4565 /* Empty push/pull lists */
4566 CustomPeerMap_clear (sub->push_map);
4567 CustomPeerMap_clear (sub->pull_map);
4571 GNUNET_STATISTICS_set (stats,
4573 View_size (sub->view),
4577 struct GNUNET_TIME_Relative time_next_round;
4579 time_next_round = compute_rand_delay (sub->round_interval, 2);
4581 /* Schedule next round */
4582 sub->do_round_task = GNUNET_SCHEDULER_add_delayed (time_next_round,
4584 LOG (GNUNET_ERROR_TYPE_DEBUG, "Finished round\n");
4589 * This is called from GNUNET_CADET_get_peers().
4591 * It is called on every peer(ID) that cadet somehow has contact with.
4592 * We use those to initialise the sampler.
4594 * implements #GNUNET_CADET_PeersCB
4596 * @param cls Closure - Sub
4597 * @param peer Peer, or NULL on "EOF".
4598 * @param tunnel Do we have a tunnel towards this peer?
4599 * @param n_paths Number of known paths towards this peer.
4600 * @param best_path How long is the best path?
4601 * (0 = unknown, 1 = ourselves, 2 = neighbor)
4604 init_peer_cb (void *cls,
4605 const struct GNUNET_PeerIdentity *peer,
4606 int tunnel, /* "Do we have a tunnel towards this peer?" */
4607 unsigned int n_paths, /* "Number of known paths towards this peer" */
4608 unsigned int best_path) /* "How long is the best path?
4609 * (0 = unknown, 1 = ourselves, 2 = neighbor)" */
4611 struct Sub *sub = cls;
4619 LOG (GNUNET_ERROR_TYPE_DEBUG,
4620 "Got peer_id %s from cadet\n",
4622 got_peer (sub, peer);
4628 * @brief Iterator function over stored, valid peers.
4630 * We initialise the sampler with those.
4632 * @param cls Closure - Sub
4633 * @param peer the peer id
4634 * @return #GNUNET_YES if we should continue to
4636 * #GNUNET_NO if not.
4639 valid_peers_iterator (void *cls,
4640 const struct GNUNET_PeerIdentity *peer)
4642 struct Sub *sub = cls;
4646 LOG (GNUNET_ERROR_TYPE_DEBUG,
4647 "Got stored, valid peer %s\n",
4649 got_peer (sub, peer);
4656 * Iterator over peers from peerinfo.
4658 * @param cls Closure - Sub
4659 * @param peer id of the peer, NULL for last call
4660 * @param hello hello message for the peer (can be NULL)
4661 * @param error message
4664 process_peerinfo_peers (void *cls,
4665 const struct GNUNET_PeerIdentity *peer,
4666 const struct GNUNET_HELLO_Message *hello,
4667 const char *err_msg)
4669 struct Sub *sub = cls;
4676 LOG (GNUNET_ERROR_TYPE_DEBUG,
4677 "Got peer_id %s from peerinfo\n",
4679 got_peer (sub, peer);
4685 * Task run during shutdown.
4687 * @param cls Closure - unused
4690 shutdown_task (void *cls)
4693 struct ClientContext *client_ctx;
4695 LOG (GNUNET_ERROR_TYPE_DEBUG,
4696 "RPS service is going down\n");
4698 /* Clean all clients */
4699 for (client_ctx = cli_ctx_head;
4700 NULL != cli_ctx_head;
4701 client_ctx = cli_ctx_head)
4703 destroy_cli_ctx (client_ctx);
4711 /* Disconnect from other services */
4712 GNUNET_PEERINFO_notify_cancel (peerinfo_notify_handle);
4713 GNUNET_PEERINFO_disconnect (peerinfo_handle);
4714 peerinfo_handle = NULL;
4715 GNUNET_NSE_disconnect (nse);
4716 if (NULL != map_single_hop)
4718 /* core_init was called - core was initialised */
4719 /* disconnect first, so no callback tries to access missing peermap */
4720 GNUNET_CORE_disconnect (core_handle);
4722 GNUNET_CONTAINER_multipeermap_destroy (map_single_hop);
4723 map_single_hop = NULL;
4728 GNUNET_STATISTICS_destroy (stats,
4732 GNUNET_CADET_disconnect (cadet_handle);
4733 cadet_handle = NULL;
4734 #if ENABLE_MALICIOUS
4735 struct AttackedPeer *tmp_att_peer;
4736 GNUNET_array_grow (mal_peers,
4739 if (NULL != mal_peer_set)
4740 GNUNET_CONTAINER_multipeermap_destroy (mal_peer_set);
4741 if (NULL != att_peer_set)
4742 GNUNET_CONTAINER_multipeermap_destroy (att_peer_set);
4743 while (NULL != att_peers_head)
4745 tmp_att_peer = att_peers_head;
4746 GNUNET_CONTAINER_DLL_remove (att_peers_head,
4749 GNUNET_free (tmp_att_peer);
4751 #endif /* ENABLE_MALICIOUS */
4757 * Handle client connecting to the service.
4760 * @param client the new client
4761 * @param mq the message queue of @a client
4765 client_connect_cb (void *cls,
4766 struct GNUNET_SERVICE_Client *client,
4767 struct GNUNET_MQ_Handle *mq)
4769 struct ClientContext *cli_ctx;
4773 LOG (GNUNET_ERROR_TYPE_DEBUG,
4774 "Client connected\n");
4776 return client; /* Server was destroyed before a client connected. Shutting down */
4777 cli_ctx = GNUNET_new (struct ClientContext);
4779 cli_ctx->view_updates_left = -1;
4780 cli_ctx->stream_update = GNUNET_NO;
4781 cli_ctx->client = client;
4782 GNUNET_CONTAINER_DLL_insert (cli_ctx_head,
4789 * Callback called when a client disconnected from the service
4791 * @param cls closure for the service
4792 * @param c the client that disconnected
4793 * @param internal_cls should be equal to @a c
4796 client_disconnect_cb (void *cls,
4797 struct GNUNET_SERVICE_Client *client,
4800 struct ClientContext *cli_ctx = internal_cls;
4803 GNUNET_assert (client == cli_ctx->client);
4805 { /* shutdown task - destroy all clients */
4806 while (NULL != cli_ctx_head)
4807 destroy_cli_ctx (cli_ctx_head);
4810 { /* destroy this client */
4811 LOG (GNUNET_ERROR_TYPE_DEBUG,
4812 "Client disconnected. Destroy its context.\n");
4813 destroy_cli_ctx (cli_ctx);
4819 * Handle random peer sampling clients.
4821 * @param cls closure
4822 * @param c configuration to use
4823 * @param service the initialized service
4827 const struct GNUNET_CONFIGURATION_Handle *c,
4828 struct GNUNET_SERVICE_Handle *service)
4830 struct GNUNET_TIME_Relative round_interval;
4831 long long unsigned int sampler_size;
4832 char hash_port_string[] = GNUNET_APPLICATION_PORT_RPS;
4833 struct GNUNET_HashCode hash;
4838 GNUNET_log_setup ("rps",
4839 GNUNET_error_type_to_string (GNUNET_ERROR_TYPE_DEBUG),
4843 GNUNET_CRYPTO_get_peer_identity (cfg,
4844 &own_identity); // TODO check return value
4845 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4846 "STARTING SERVICE (rps) for peer [%s]\n",
4847 GNUNET_i2s (&own_identity));
4848 #if ENABLE_MALICIOUS
4849 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4850 "Malicious execution compiled in.\n");
4851 #endif /* ENABLE_MALICIOUS */
4853 /* Get time interval from the configuration */
4855 GNUNET_CONFIGURATION_get_value_time (cfg,
4860 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
4861 "RPS", "ROUNDINTERVAL");
4862 GNUNET_SCHEDULER_shutdown ();
4866 /* Get initial size of sampler/view from the configuration */
4868 GNUNET_CONFIGURATION_get_value_number (cfg,
4873 GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
4875 GNUNET_SCHEDULER_shutdown ();
4879 cadet_handle = GNUNET_CADET_connect (cfg);
4880 GNUNET_assert (NULL != cadet_handle);
4881 core_handle = GNUNET_CORE_connect (cfg,
4883 core_init, /* init */
4884 core_connects, /* connects */
4885 core_disconnects, /* disconnects */
4886 NULL); /* handlers */
4887 GNUNET_assert (NULL != core_handle);
4894 /* Set up main Sub */
4895 GNUNET_CRYPTO_hash (hash_port_string,
4896 strlen (hash_port_string),
4898 msub = new_sub (&hash,
4899 sampler_size, /* Will be overwritten by config */
4903 peerinfo_handle = GNUNET_PEERINFO_connect (cfg);
4905 /* connect to NSE */
4906 nse = GNUNET_NSE_connect (cfg, nse_callback, NULL);
4908 // LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting peers from CADET\n");
4909 // GNUNET_CADET_get_peers (cadet_handle, &init_peer_cb, msub);
4910 // TODO send push/pull to each of those peers?
4911 LOG (GNUNET_ERROR_TYPE_DEBUG, "Requesting stored valid peers\n");
4912 restore_valid_peers (msub);
4913 get_valid_peers (msub->valid_peers, valid_peers_iterator, msub);
4915 peerinfo_notify_handle = GNUNET_PEERINFO_notify (cfg,
4917 process_peerinfo_peers,
4920 LOG (GNUNET_ERROR_TYPE_INFO, "Ready to receive requests from clients\n");
4922 GNUNET_SCHEDULER_add_shutdown (&shutdown_task, NULL);
4923 stats = GNUNET_STATISTICS_create ("rps", cfg);
4928 * Define "main" method using service macro.
4932 GNUNET_SERVICE_OPTION_NONE,
4935 &client_disconnect_cb,
4937 GNUNET_MQ_hd_var_size (client_seed,
4938 GNUNET_MESSAGE_TYPE_RPS_CS_SEED,
4939 struct GNUNET_RPS_CS_SeedMessage,
4941 #if ENABLE_MALICIOUS
4942 GNUNET_MQ_hd_var_size (client_act_malicious,
4943 GNUNET_MESSAGE_TYPE_RPS_ACT_MALICIOUS,
4944 struct GNUNET_RPS_CS_ActMaliciousMessage,
4946 #endif /* ENABLE_MALICIOUS */
4947 GNUNET_MQ_hd_fixed_size (client_view_request,
4948 GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_VIEW_REQUEST,
4949 struct GNUNET_RPS_CS_DEBUG_ViewRequest,
4951 GNUNET_MQ_hd_fixed_size (client_view_cancel,
4952 GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_VIEW_CANCEL,
4953 struct GNUNET_MessageHeader,
4955 GNUNET_MQ_hd_fixed_size (client_stream_request,
4956 GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_STREAM_REQUEST,
4957 struct GNUNET_RPS_CS_DEBUG_StreamRequest,
4959 GNUNET_MQ_hd_fixed_size (client_stream_cancel,
4960 GNUNET_MESSAGE_TYPE_RPS_CS_DEBUG_STREAM_CANCEL,
4961 struct GNUNET_MessageHeader,
4963 GNUNET_MQ_hd_fixed_size (client_start_sub,
4964 GNUNET_MESSAGE_TYPE_RPS_CS_SUB_START,
4965 struct GNUNET_RPS_CS_SubStartMessage,
4967 GNUNET_MQ_hd_fixed_size (client_stop_sub,
4968 GNUNET_MESSAGE_TYPE_RPS_CS_SUB_STOP,
4969 struct GNUNET_RPS_CS_SubStopMessage,
4971 GNUNET_MQ_handler_end ());
4973 /* end of gnunet-service-rps.c */