2 This file is part of GNUnet.
3 (C) 2009 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file dv/gnunet-service-dv.c
23 * @brief the distance vector service, primarily handles gossip of nearby
24 * peers and sending/receiving DV messages from core and decapsulating
27 * @author Christian Grothoff
28 * @author Nathan Evans
30 * TODO: The gossip rates need to be worked out. Probably many other things
35 #include "gnunet_client_lib.h"
36 #include "gnunet_getopt_lib.h"
37 #include "gnunet_os_lib.h"
38 #include "gnunet_protocols.h"
39 #include "gnunet_service_lib.h"
40 #include "gnunet_core_service.h"
41 #include "gnunet_signal_lib.h"
42 #include "gnunet_util_lib.h"
43 #include "gnunet_hello_lib.h"
44 #include "gnunet_peerinfo_service.h"
45 #include "gnunet_crypto_lib.h"
49 * For testing mostly, remember only the
50 * shortest path to a distant neighbor.
52 #define AT_MOST_ONE GNUNET_NO
54 #define USE_PEER_ID GNUNET_YES
57 * How many outstanding messages (unknown sender) will we allow per peer?
59 #define MAX_OUTSTANDING_MESSAGES 5
62 * How often do we check about sending out more peer information (if
63 * we are connected to no peers previously).
65 #define GNUNET_DV_DEFAULT_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
68 * How long do we wait at most between sending out information?
70 #define GNUNET_DV_MAX_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
73 * How long can we have not heard from a peer and
74 * still have it in our tables?
76 #define GNUNET_DV_PEER_EXPIRATION_TIME GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 1000))
79 * Priority for gossip.
81 #define GNUNET_DV_DHT_GOSSIP_PRIORITY (GNUNET_EXTREME_PRIORITY / 10)
84 * How often should we check if expiration time has elapsed for
87 #define GNUNET_DV_MAINTAIN_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
90 * How long to allow a message to be delayed?
92 #define DV_DELAY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
95 * Priority to use for DV data messages.
100 * The cost to a direct neighbor. We used to use 0, but 1 makes more sense.
102 #define DIRECT_NEIGHBOR_COST 1
105 * The default number of direct connections to store in DV (max)
107 #define DEFAULT_DIRECT_CONNECTIONS 50
110 * The default size of direct + extended peers in DV (max)
112 #define DEFAULT_DV_SIZE 100
115 * The default fisheye depth, from how many hops away will
118 #define DEFAULT_FISHEYE_DEPTH 4
121 * Linked list of messages to send to clients.
123 struct PendingMessage
126 * Pointer to next item in the list
128 struct PendingMessage *next;
131 * Pointer to previous item in the list
133 struct PendingMessage *prev;
136 * The PeerIdentity to send to
138 struct GNUNET_PeerIdentity recipient;
141 * The result of message sending.
143 struct GNUNET_DV_SendResultMessage *send_result;
146 * Message importance level.
148 unsigned int importance;
153 unsigned int msg_size;
156 * How long to wait before sending message.
158 struct GNUNET_TIME_Relative timeout;
161 * Actual message to be sent; // avoid allocation
163 const struct GNUNET_MessageHeader *msg; // msg = (cast) &pm[1]; // memcpy (&pm[1], data, len);
167 struct FastGossipNeighborList
170 * Next element of DLL
172 struct FastGossipNeighborList *next;
175 * Prev element of DLL
177 struct FastGossipNeighborList *prev;
180 * The neighbor to gossip about
182 struct DistantNeighbor *about;
186 * Context created whenever a direct peer connects to us,
187 * used to gossip other peers to it.
189 struct NeighborSendContext
192 * The peer we will gossip to.
194 struct DirectNeighbor *toNeighbor;
197 * The task associated with this context.
199 GNUNET_SCHEDULER_TaskIdentifier task;
202 * Head of DLL of peers to gossip about
203 * as fast as possible to this peer, for initial
206 struct FastGossipNeighborList *fast_gossip_list_head;
209 * Tail of DLL of peers to gossip about
210 * as fast as possible to this peer, for initial
213 struct FastGossipNeighborList *fast_gossip_list_tail;
219 * Struct to hold information for updating existing neighbors
221 struct NeighborUpdateInfo
229 * The existing neighbor
231 struct DistantNeighbor *neighbor;
234 * The referrer of the possibly existing peer
236 struct DirectNeighbor *referrer;
239 * The time we heard about this peer
241 struct GNUNET_TIME_Absolute now;
244 * Peer id this peer uses to refer to neighbor.
246 unsigned int referrer_peer_id;
251 * Struct to store a single message received with
254 struct UnknownSenderMessage
257 * Message sender (immediate)
259 struct GNUNET_PeerIdentity sender;
262 * The actual message received
264 struct GNUNET_MessageHeader *message;
267 * Latency of connection
269 struct GNUNET_TIME_Relative latency;
272 * Distance to destination
283 * Struct where actual neighbor information is stored,
284 * referenced by min_heap and max_heap. Freeing dealt
285 * with when items removed from hashmap.
287 struct DirectNeighbor
290 * Identity of neighbor.
292 struct GNUNET_PeerIdentity identity;
295 * PublicKey of neighbor.
297 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
300 * Head of DLL of nodes that this direct neighbor referred to us.
302 struct DistantNeighbor *referee_head;
305 * Tail of DLL of nodes that this direct neighbor referred to us.
307 struct DistantNeighbor *referee_tail;
310 * The sending context for gossiping peers to this neighbor.
312 struct NeighborSendContext *send_context;
315 * Is this one of the direct neighbors that we are "hiding"
321 * Save messages immediately from this direct neighbor from a
322 * distan peer we don't know on the chance that it will be
323 * gossiped about and we can deliver the message.
325 struct UnknownSenderMessage pending_messages[MAX_OUTSTANDING_MESSAGES];
330 * Struct where actual neighbor information is stored,
331 * referenced by min_heap and max_heap. Freeing dealt
332 * with when items removed from hashmap.
334 struct DistantNeighbor
337 * We keep distant neighbor's of the same referrer in a DLL.
339 struct DistantNeighbor *next;
342 * We keep distant neighbor's of the same referrer in a DLL.
344 struct DistantNeighbor *prev;
349 struct GNUNET_CONTAINER_HeapNode *min_loc;
354 struct GNUNET_CONTAINER_HeapNode *max_loc;
357 * Identity of referrer (next hop towards 'neighbor').
359 struct DirectNeighbor *referrer;
362 * Identity of neighbor.
364 struct GNUNET_PeerIdentity identity;
367 * PublicKey of neighbor.
369 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey;
372 * Last time we received routing information from this peer
374 struct GNUNET_TIME_Absolute last_activity;
377 * Last time we sent routing information about this peer
379 struct GNUNET_TIME_Absolute last_gossip;
382 * Cost to neighbor, used for actual distance vector computations
387 * Random identifier *we* use for this peer, to be used as shortcut
388 * instead of sending full peer id for each message
393 * Random identifier the *referrer* uses for this peer.
395 unsigned int referrer_id;
398 * Is this one of the direct neighbors that we are "hiding"
405 struct PeerIteratorContext
408 * The actual context, to be freed later.
410 struct GNUNET_PEERINFO_IteratorContext *ic;
413 * The neighbor about which we are concerned.
415 struct DirectNeighbor *neighbor;
418 * The distant neighbor entry for this direct neighbor.
420 struct DistantNeighbor *distant;
425 * Context used for creating hello messages when
426 * gossips are received.
431 * Identity of distant neighbor.
433 struct GNUNET_PeerIdentity distant_peer;
436 * Identity of direct neighbor, via which we send this message.
438 const struct GNUNET_PeerIdentity *direct_peer;
441 * How many addresses do we need to add (always starts at 1, then set to 0)
443 int addresses_to_add;
447 struct DV_SendContext
450 * The distant peer (should always match)
452 struct GNUNET_PeerIdentity *distant_peer;
455 * The direct peer, we need to verify the referrer of.
457 struct GNUNET_PeerIdentity *direct_peer;
460 * The message to be sent
462 struct GNUNET_MessageHeader *message;
465 * The pre-built send result message. Simply needs to be queued
466 * and freed once send has been called!
468 struct GNUNET_DV_SendResultMessage *send_result;
471 * The size of the message being sent, may be larger
472 * than message->header.size because it's multiple
473 * messages packed into one!
478 * How important is this message?
480 unsigned int importance;
483 * Timeout for this message
485 struct GNUNET_TIME_Relative timeout;
488 * Unique ID for DV message
493 struct FindDestinationContext
496 struct DistantNeighbor *dest;
502 struct GNUNET_PeerIdentity *dest;
503 const struct GNUNET_PeerIdentity *via;
506 struct DisconnectContext
509 * Distant neighbor to get pid from.
511 struct DistantNeighbor *distant;
514 * Direct neighbor that disconnected.
516 struct DirectNeighbor *direct;
519 struct TokenizedMessageContext
522 * Immediate sender of this message
524 const struct GNUNET_PeerIdentity *peer;
527 * Distant sender of the message
529 struct DistantNeighbor *distant;
532 * Uid for this set of messages
538 * Context for finding the least cost peer to send to.
539 * Transport selection can only go so far.
541 struct FindLeastCostContext
543 struct DistantNeighbor *target;
544 unsigned int least_cost;
548 * Handle to the core service api.
550 static struct GNUNET_CORE_Handle *coreAPI;
553 * Stream tokenizer to handle messages coming in from core.
555 static struct GNUNET_SERVER_MessageStreamTokenizer *coreMST;
558 * The identity of our peer.
560 static struct GNUNET_PeerIdentity my_identity;
563 * The configuration for this service.
565 static const struct GNUNET_CONFIGURATION_Handle *cfg;
568 * The scheduler for this service.
570 static struct GNUNET_SCHEDULER_Handle *sched;
573 * The client, the DV plugin connected to us. Hopefully
574 * this client will never change, although if the plugin dies
575 * and returns for some reason it may happen.
577 static struct GNUNET_SERVER_Client * client_handle;
580 * Task to run when we shut down, cleaning up all our trash
582 static GNUNET_SCHEDULER_TaskIdentifier cleanup_task;
584 static size_t default_dv_priority = 0;
586 static char *my_short_id;
589 * Transmit handle to the plugin.
591 static struct GNUNET_CONNECTION_TransmitHandle * plugin_transmit_handle;
594 * Head of DLL for client messages
596 static struct PendingMessage *plugin_pending_head;
599 * Tail of DLL for client messages
601 static struct PendingMessage *plugin_pending_tail;
604 * Handle to the peerinfo service
606 static struct GNUNET_PEERINFO_Handle *peerinfo_handle;
609 * Transmit handle to core service.
611 static struct GNUNET_CORE_TransmitHandle * core_transmit_handle;
614 * Head of DLL for core messages
616 static struct PendingMessage *core_pending_head;
619 * Tail of DLL for core messages
621 static struct PendingMessage *core_pending_tail;
624 * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for all
625 * directly connected peers.
627 static struct GNUNET_CONTAINER_MultiHashMap *direct_neighbors;
630 * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for
631 * peers connected via DV (extended neighborhood). Does ALSO
632 * include any peers that are in 'direct_neighbors'; for those
633 * peers, the cost will be zero and the referrer all zeros.
635 static struct GNUNET_CONTAINER_MultiHashMap *extended_neighbors;
638 * We use the min heap (min refers to cost) to prefer
639 * gossipping about peers with small costs.
641 static struct GNUNET_CONTAINER_Heap *neighbor_min_heap;
644 * We use the max heap (max refers to cost) for general
645 * iterations over all peers and to remove the most costly
646 * connection if we have too many.
648 static struct GNUNET_CONTAINER_Heap *neighbor_max_heap;
651 * How far out to keep peers we learn about.
653 static unsigned long long fisheye_depth;
656 * How many peers to store at most.
658 static unsigned long long max_table_size;
661 * We've been given a target ID based on the random numbers that
662 * we assigned to our DV-neighborhood. Find the entry for the
663 * respective neighbor.
666 find_destination (void *cls,
667 struct GNUNET_CONTAINER_HeapNode *node,
668 void *element, GNUNET_CONTAINER_HeapCostType cost)
670 struct FindDestinationContext *fdc = cls;
671 struct DistantNeighbor *dn = element;
673 if (fdc->tid != dn->our_id)
681 * We've been given a target ID based on the random numbers that
682 * we assigned to our DV-neighborhood. Find the entry for the
683 * respective neighbor.
686 find_specific_id (void *cls,
687 const GNUNET_HashCode *key,
690 struct FindIDContext *fdc = cls;
691 struct DistantNeighbor *dn = value;
693 if (memcmp(&dn->referrer->identity, fdc->via, sizeof(struct GNUNET_PeerIdentity)) == 0)
695 fdc->tid = dn->referrer_id;
702 * Find a distant peer whose referrer_id matches what we're
703 * looking for. For looking up a peer we've gossipped about
704 * but is now disconnected. Need to do this because we don't
705 * want to remove those that may be accessible via a different
708 static int find_distant_peer (void *cls,
709 const GNUNET_HashCode * key,
712 struct FindDestinationContext *fdc = cls;
713 struct DistantNeighbor *distant = value;
715 if (fdc->tid == distant->referrer_id)
724 * Function called to notify a client about the socket
725 * begin ready to queue more data. "buf" will be
726 * NULL and "size" zero if the socket was closed for
727 * writing in the meantime.
730 * @param size number of bytes available in buf
731 * @param buf where the callee should write the message
732 * @return number of bytes written to buf
734 size_t transmit_to_plugin (void *cls,
735 size_t size, void *buf)
738 struct PendingMessage *reply;
744 /* client disconnected */
745 #if DEBUG_DV_MESSAGES
746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: %s buffer was NULL (client disconnect?)\n", my_short_id, "transmit_to_plugin");
750 plugin_transmit_handle = NULL;
752 while ( (NULL != (reply = plugin_pending_head)) &&
753 (size >= off + (msize = ntohs (reply->msg->size))))
755 GNUNET_CONTAINER_DLL_remove (plugin_pending_head,
758 memcpy (&cbuf[off], reply->msg, msize);
763 if (plugin_pending_head != NULL)
764 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
765 ntohs(plugin_pending_head->msg->size),
766 GNUNET_TIME_UNIT_FOREVER_REL,
767 &transmit_to_plugin, NULL);
773 * Send a message to the dv plugin.
775 * @param sender the direct sender of the message
776 * @param message the message to send to the plugin
777 * (may be an encapsulated type)
778 * @param message_size the size of the message to be sent
779 * @param distant_neighbor the original sender of the message
780 * @param cost the cost to the original sender of the message
782 void send_to_plugin(const struct GNUNET_PeerIdentity * sender,
783 const struct GNUNET_MessageHeader *message,
785 struct GNUNET_PeerIdentity *distant_neighbor,
788 struct GNUNET_DV_MessageReceived *received_msg;
789 struct PendingMessage *pending_message;
790 char *sender_address;
791 size_t sender_address_len;
792 char *packed_msg_start;
796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_to_plugin called with peer %s as sender\n", GNUNET_i2s(distant_neighbor));
799 if (memcmp(sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity)) != 0)
801 sender_address_len = sizeof(struct GNUNET_PeerIdentity) * 2;
802 sender_address = GNUNET_malloc(sender_address_len);
803 memcpy(sender_address, distant_neighbor, sizeof(struct GNUNET_PeerIdentity));
804 memcpy(&sender_address[sizeof(struct GNUNET_PeerIdentity)], sender, sizeof(struct GNUNET_PeerIdentity));
808 sender_address_len = sizeof(struct GNUNET_PeerIdentity);
809 sender_address = GNUNET_malloc(sender_address_len);
810 memcpy(sender_address, sender, sizeof(struct GNUNET_PeerIdentity));
813 size = sizeof(struct GNUNET_DV_MessageReceived) + sender_address_len + message_size;
814 received_msg = GNUNET_malloc(size);
815 received_msg->header.size = htons(size);
816 received_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_RECEIVE);
817 received_msg->distance = htonl(cost);
818 received_msg->msg_len = htonl(message_size);
819 /* Set the sender in this message to be the original sender! */
820 memcpy(&received_msg->sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity));
821 /* Copy the intermediate sender to the end of the message, this is how the transport identifies this peer */
822 memcpy(&received_msg[1], sender_address, sender_address_len);
823 GNUNET_free(sender_address);
824 /* Copy the actual message after the sender */
825 packed_msg_start = (char *)&received_msg[1];
826 packed_msg_start = &packed_msg_start[sender_address_len];
827 memcpy(packed_msg_start, message, message_size);
828 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + size);
829 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
830 memcpy(&pending_message[1], received_msg, size);
831 GNUNET_free(received_msg);
833 GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
835 if (client_handle != NULL)
837 if (plugin_transmit_handle == NULL)
839 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
840 size, GNUNET_TIME_UNIT_FOREVER_REL,
841 &transmit_to_plugin, NULL);
846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, client_handle not yet set (how?)!\n");
850 /* Declare here so retry_core_send is aware of it */
851 size_t core_transmit_notify (void *cls,
852 size_t size, void *buf);
855 * Try to send another message from our core sending list
858 try_core_send (void *cls,
859 const struct GNUNET_SCHEDULER_TaskContext *tc)
861 struct PendingMessage *pending;
862 pending = core_pending_head;
864 if (core_transmit_handle != NULL)
865 return; /* Message send already in progress */
868 core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, pending->importance, pending->timeout, &pending->recipient, pending->msg_size, &core_transmit_notify, NULL);
872 * Function called to notify a client about the socket
873 * being ready to queue more data. "buf" will be
874 * NULL and "size" zero if the socket was closed for
875 * writing in the meantime.
877 * @param cls closure (NULL)
878 * @param size number of bytes available in buf
879 * @param buf where the callee should write the message
880 * @return number of bytes written to buf
882 size_t core_transmit_notify (void *cls,
883 size_t size, void *buf)
886 struct PendingMessage *pending;
887 struct PendingMessage *client_reply;
893 /* client disconnected */
895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s': buffer was NULL\n", "DHT");
900 core_transmit_handle = NULL;
902 pending = core_pending_head;
903 if ( (pending != NULL) &&
904 (size >= (msize = ntohs (pending->msg->size))))
907 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "`%s' : transmit_notify (core) called with size %d\n", "dv service", msize);
909 GNUNET_CONTAINER_DLL_remove (core_pending_head,
912 if (pending->send_result != NULL) /* Will only be non-null if a real client asked for this send */
914 client_reply = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
915 client_reply->msg = (struct GNUNET_MessageHeader *)&client_reply[1];
916 memcpy(&client_reply[1], pending->send_result, sizeof(struct GNUNET_DV_SendResultMessage));
917 GNUNET_free(pending->send_result);
919 GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, client_reply);
920 if (client_handle != NULL)
922 if (plugin_transmit_handle == NULL)
924 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
925 sizeof(struct GNUNET_DV_SendResultMessage),
926 GNUNET_TIME_UNIT_FOREVER_REL,
927 &transmit_to_plugin, NULL);
931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
935 memcpy (&cbuf[off], pending->msg, msize);
936 GNUNET_free (pending);
939 /*reply = core_pending_head;*/
941 GNUNET_SCHEDULER_add_now(sched, &try_core_send, NULL);
943 core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, reply->importance, reply->timeout, &reply->recipient, reply->msg_size, &core_transmit_notify, NULL);*/
950 * Send a DV data message via DV.
952 * @param sender the original sender of the message
953 * @param recipient the next hop recipient, may be our direct peer, maybe not
954 * @param send_context the send context
957 send_message_via (const struct GNUNET_PeerIdentity *sender,
958 const struct GNUNET_PeerIdentity *recipient,
959 struct DV_SendContext *send_context)
961 p2p_dv_MESSAGE_Data *toSend;
962 unsigned int msg_size;
963 unsigned int recipient_id;
964 unsigned int sender_id;
965 struct DistantNeighbor *source;
966 struct PendingMessage *pending_message;
967 struct FindIDContext find_context;
972 msg_size = send_context->message_size + sizeof (p2p_dv_MESSAGE_Data);
974 find_context.dest = send_context->distant_peer;
975 find_context.via = recipient;
976 find_context.tid = 0;
977 GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors, &send_context->distant_peer->hashPubKey,
978 &find_specific_id, &find_context);
980 if (find_context.tid == 0)
982 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: find_specific_id failed to find peer!\n", my_short_id);
983 /* target unknown to us, drop! */
984 return GNUNET_SYSERR;
986 recipient_id = find_context.tid;
988 if (0 == (memcmp (&my_identity,
989 sender, sizeof (struct GNUNET_PeerIdentity))))
992 source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
993 &sender->hashPubKey);
995 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: send_message_via found %s, myself in extended peer list???\n", my_short_id, GNUNET_i2s(&source->identity));
999 source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1000 &sender->hashPubKey);
1003 /* sender unknown to us, drop! */
1004 return GNUNET_SYSERR;
1006 sender_id = source->our_id;
1009 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + msg_size);
1010 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1011 pending_message->send_result = send_context->send_result;
1012 memcpy(&pending_message->recipient, recipient, sizeof(struct GNUNET_PeerIdentity));
1013 pending_message->msg_size = msg_size;
1014 pending_message->importance = send_context->importance;
1015 pending_message->timeout = send_context->timeout;
1016 toSend = (p2p_dv_MESSAGE_Data *)pending_message->msg;
1017 toSend->header.size = htons (msg_size);
1018 toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA);
1019 toSend->sender = htonl (sender_id);
1020 toSend->recipient = htonl (recipient_id);
1021 #if DEBUG_DV_MESSAGES
1022 toSend->uid = send_context->uid; /* Still sent around in network byte order */
1024 toSend->uid = htonl(0);
1027 memcpy (&toSend[1], send_context->message, send_context->message_size);
1030 memcpy(&shortname, GNUNET_i2s(send_context->distant_peer), 4);
1031 shortname[4] = '\0';
1032 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Notifying core of send to destination `%s' via `%s' size %u\n", "DV", &shortname, GNUNET_i2s(recipient), msg_size);
1035 GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
1040 GNUNET_SCHEDULER_add_now(sched, try_core_send, NULL);
1046 * Given a FindLeastCostContext, and a set
1047 * of peers that match the target, return the cheapest.
1049 * @param cls closure, a struct FindLeastCostContext
1050 * @param key the key identifying the target peer
1051 * @param value the target peer
1053 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
1056 find_least_cost_peer (void *cls,
1057 const GNUNET_HashCode *key,
1060 struct FindLeastCostContext *find_context = cls;
1061 struct DistantNeighbor *dn = value;
1063 if (dn->cost < find_context->least_cost)
1065 find_context->target = dn;
1067 if (dn->cost == DIRECT_NEIGHBOR_COST)
1073 * Send a DV data message via DV.
1075 * @param recipient the ultimate recipient of this message
1076 * @param sender the original sender of the message
1077 * @param specific_neighbor the specific neighbor to send this message via
1078 * @param message the packed message
1079 * @param message_size size of the message
1080 * @param importance what priority to send this message with
1081 * @param uid the unique identifier of this message (or 0 for none)
1082 * @param timeout how long to possibly delay sending this message
1085 send_message (const struct GNUNET_PeerIdentity * recipient,
1086 const struct GNUNET_PeerIdentity * sender,
1087 const struct DistantNeighbor * specific_neighbor,
1088 const struct GNUNET_MessageHeader * message,
1089 size_t message_size,
1090 unsigned int importance,
1092 struct GNUNET_TIME_Relative timeout)
1094 p2p_dv_MESSAGE_Data *toSend;
1095 unsigned int msg_size;
1097 unsigned int recipient_id;
1098 unsigned int sender_id;
1099 struct DistantNeighbor *target;
1100 struct DistantNeighbor *source;
1101 struct PendingMessage *pending_message;
1102 struct FindLeastCostContext find_least_ctx;
1103 #if DEBUG_DV_PEER_NUMBERS
1104 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerFrom;
1105 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerTo;
1106 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerVia;
1108 msg_size = message_size + sizeof (p2p_dv_MESSAGE_Data);
1110 find_least_ctx.least_cost = -1;
1111 find_least_ctx.target = NULL;
1113 * Need to find the least cost peer, lest the transport selection keep
1114 * picking the same DV route for the same destination which results
1115 * in messages looping forever. Relatively cheap, we don't iterate
1116 * over all known peers, just those that apply.
1118 GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors,
1119 &recipient->hashPubKey, &find_least_cost_peer, &find_least_ctx);
1120 target = find_least_ctx.target;
1124 /* target unknown to us, drop! */
1125 return GNUNET_SYSERR;
1127 recipient_id = target->referrer_id;
1129 source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1130 &sender->hashPubKey);
1133 if (0 != (memcmp (&my_identity,
1134 sender, sizeof (struct GNUNET_PeerIdentity))))
1136 /* sender unknown to us, drop! */
1137 return GNUNET_SYSERR;
1139 sender_id = 0; /* 0 == us */
1143 /* find out the number that we use when we gossip about
1145 sender_id = source->our_id;
1148 #if DEBUG_DV_PEER_NUMBERS
1149 GNUNET_CRYPTO_hash_to_enc (&source->identity.hashPubKey, &encPeerFrom);
1150 GNUNET_CRYPTO_hash_to_enc (&target->referrer->identity.hashPubKey, &encPeerVia);
1151 encPeerFrom.encoding[4] = '\0';
1152 encPeerVia.encoding[4] = '\0';
1154 if ((sender_id != 0) && (0 == memcmp(&source->identity, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity))))
1159 cost = target->cost;
1160 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + msg_size);
1161 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1162 pending_message->send_result = NULL;
1163 pending_message->importance = importance;
1164 pending_message->timeout = timeout;
1165 memcpy(&pending_message->recipient, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity));
1166 pending_message->msg_size = msg_size;
1167 toSend = (p2p_dv_MESSAGE_Data *)pending_message->msg;
1168 toSend->header.size = htons (msg_size);
1169 toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA);
1170 toSend->sender = htonl (sender_id);
1171 toSend->recipient = htonl (recipient_id);
1172 #if DEBUG_DV_MESSAGES
1173 toSend->uid = htonl(uid);
1175 toSend->uid = htonl(0);
1178 #if DEBUG_DV_PEER_NUMBERS
1179 GNUNET_CRYPTO_hash_to_enc (&target->identity.hashPubKey, &encPeerTo);
1180 encPeerTo.encoding[4] = '\0';
1181 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Sending DATA message. Sender id %u, source %s, destination %s, via %s\n", GNUNET_i2s(&my_identity), sender_id, &encPeerFrom, &encPeerTo, &encPeerVia);
1183 memcpy (&toSend[1], message, message_size);
1184 if ((source != NULL) && (source->pkey == NULL)) /* Test our hypothesis about message failures! */
1186 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: Sending message, but anticipate recipient will not know sender!!!\n\n\n");
1188 GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
1193 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Notifying core of send size %d to destination `%s'\n", "DV SEND MESSAGE", msg_size, GNUNET_i2s(recipient));
1196 GNUNET_SCHEDULER_add_now(sched, try_core_send, NULL);
1201 struct CheckPeerContext
1206 struct DistantNeighbor *peer;
1209 * Sender id to search for
1211 unsigned int sender_id;
1215 * Iterator over hash map entries.
1217 * @param cls closure
1218 * @param key current key code
1219 * @param value value in the hash map
1220 * @return GNUNET_YES if we should continue to
1224 int checkPeerID (void *cls,
1225 const GNUNET_HashCode * key,
1228 struct CheckPeerContext *ctx = cls;
1229 struct DistantNeighbor *distant = value;
1231 if (memcmp(key, &ctx->sender_id, sizeof(unsigned int)) == 0)
1233 ctx->peer = distant;
1243 * Handler for messages parsed out by the tokenizer from
1244 * DV DATA received for this peer.
1247 * @param client the TokenizedMessageContext which contains message information
1248 * @param message the actual message
1250 void tokenized_message_handler (void *cls,
1252 const struct GNUNET_MessageHeader *message)
1254 struct TokenizedMessageContext *ctx = client;
1255 GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP);
1256 GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA);
1257 if ( (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP) &&
1258 (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA) )
1260 #if DEBUG_DV_MESSAGES
1261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1262 "%s: Receives %s message for me, uid %u, size %d, type %d cost %u from %s!\n", my_short_id, "DV DATA", ctx->uid, ntohs(message->size), ntohs(message->type), ctx->distant->cost, GNUNET_i2s(&ctx->distant->identity));
1264 GNUNET_assert(memcmp(ctx->peer, &ctx->distant->identity, sizeof(struct GNUNET_PeerIdentity)) != 0);
1265 send_to_plugin(ctx->peer, message, ntohs(message->size), &ctx->distant->identity, ctx->distant->cost);
1270 struct DelayedMessageContext
1272 struct GNUNET_PeerIdentity dest;
1273 struct GNUNET_PeerIdentity sender;
1274 struct GNUNET_MessageHeader *message;
1275 size_t message_size;
1279 void send_message_delayed (void *cls,
1280 const struct GNUNET_SCHEDULER_TaskContext *tc)
1282 struct DelayedMessageContext *msg_ctx = cls;
1283 if (msg_ctx != NULL)
1285 send_message(&msg_ctx->dest,
1289 msg_ctx->message_size,
1290 default_dv_priority,
1292 GNUNET_TIME_relative_get_forever());
1293 GNUNET_free(msg_ctx->message);
1294 GNUNET_free(msg_ctx);
1301 * Core handler for dv data messages. Whatever this message
1302 * contains all we really have to do is rip it out of its
1303 * DV layering and give it to our pal the DV plugin to report
1306 * @param cls closure
1307 * @param peer peer which sent the message (immediate sender)
1308 * @param message the message
1309 * @param latency the latency of the connection we received the message from
1310 * @param distance the distance to the immediate peer
1312 static int handle_dv_data_message (void *cls,
1313 const struct GNUNET_PeerIdentity * peer,
1314 const struct GNUNET_MessageHeader * message,
1315 struct GNUNET_TIME_Relative latency,
1318 const p2p_dv_MESSAGE_Data *incoming = (const p2p_dv_MESSAGE_Data *) message;
1319 const struct GNUNET_MessageHeader *packed_message;
1320 struct DirectNeighbor *dn;
1321 struct DistantNeighbor *pos;
1322 unsigned int sid; /* Sender id */
1323 unsigned int tid; /* Target id */
1324 struct GNUNET_PeerIdentity *original_sender;
1325 struct GNUNET_PeerIdentity *destination;
1326 struct FindDestinationContext fdc;
1327 struct TokenizedMessageContext tkm_ctx;
1331 struct DelayedMessageContext *delayed_context;
1334 struct CheckPeerContext checkPeerCtx;
1336 #if DEBUG_DV_MESSAGES
1340 size_t packed_message_size;
1343 packed_message_size = ntohs(incoming->header.size) - sizeof(p2p_dv_MESSAGE_Data);
1345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1346 "%s: Receives DATA message from %s size %d, packed size %d!\n", my_short_id, GNUNET_i2s(peer) , ntohs(incoming->header.size), packed_message_size);
1349 if (ntohs (incoming->header.size) < sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader))
1353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1354 "`%s': Message sizes don't add up, total size %u, expected at least %u!\n", "dv service", ntohs(incoming->header.size), sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader));
1356 return GNUNET_SYSERR;
1359 dn = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
1364 sid = ntohl (incoming->sender);
1368 checkPeerCtx.sender_id = sid;
1369 checkPeerCtx.peer = NULL;
1370 GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &checkPeerID, &checkPeerCtx);
1371 pos = checkPeerCtx.peer;
1375 pos = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1379 pos = dn->referee_head;
1380 while ((NULL != pos) && (pos->referrer_id != sid))
1386 #if DEBUG_DV_MESSAGES
1387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1388 "%s: unknown sender (%u), Message uid %u from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity));
1389 pos = dn->referee_head;
1390 while ((NULL != pos) && (pos->referrer_id != sid))
1392 sender_id = strdup(GNUNET_i2s(&pos->identity));
1393 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "I know sender %u %s\n", pos->referrer_id, sender_id);
1394 GNUNET_free(sender_id);
1398 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1399 "%s: unknown sender (%u), Message uid %u from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity));
1402 for (i = 0; i< MAX_OUTSTANDING_MESSAGES; i++)
1404 if (dn->pending_messages[i].sender_id == 0)
1411 if (found_pos == -1)
1413 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1414 "%s: Too many unknown senders (%u), ignoring message! Message uid %llu from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity));
1418 dn->pending_messages[found_pos].message = GNUNET_malloc(ntohs (message->size));
1419 memcpy(dn->pending_messages[found_pos].message, message, ntohs(message->size));
1420 dn->pending_messages[found_pos].distance = distance;
1421 dn->pending_messages[found_pos].latency = latency;
1422 memcpy(&dn->pending_messages[found_pos].sender, peer, sizeof(struct GNUNET_PeerIdentity));
1423 dn->pending_messages[found_pos].sender_id = sid;
1425 /* unknown sender */
1428 original_sender = &pos->identity;
1429 tid = ntohl (incoming->recipient);
1433 cbuf = (char *)&incoming[1];
1435 tkm_ctx.peer = peer;
1436 tkm_ctx.distant = pos;
1437 tkm_ctx.uid = ntohl(incoming->uid);
1438 if (GNUNET_OK != GNUNET_SERVER_mst_receive (coreMST,
1441 packed_message_size,
1446 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: %s Received corrupt data, discarding!", my_short_id, "DV SERVICE");
1452 packed_message = (struct GNUNET_MessageHeader *)&incoming[1];
1455 /* FIXME: this is the *only* per-request operation we have in DV
1456 that is O(n) in relation to the number of connected peers; a
1457 hash-table lookup could easily solve this (minor performance
1461 GNUNET_CONTAINER_heap_iterate (neighbor_max_heap,
1462 &find_destination, &fdc);
1465 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1466 "%s: Receives %s message for someone else!\n", "dv", "DV DATA");
1469 if (fdc.dest == NULL)
1471 #if DEBUG_DV_MESSAGES
1472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1473 "%s: Receives %s message uid %u for someone we don't know (id %u)!\n", my_short_id, "DV DATA", ntohl(incoming->uid), tid);
1477 destination = &fdc.dest->identity;
1479 if (0 == memcmp (destination, peer, sizeof (struct GNUNET_PeerIdentity)))
1481 /* FIXME: create stat: routing loop-discard! */
1482 #if DEBUG_DV_PEER_NUMBERS
1483 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "\n\n\nLoopy loo message\n\n\n");
1486 #if DEBUG_DV_MESSAGES
1487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1488 "%s: DROPPING MESSAGE uid %u type %d, routing loop! Message immediately from %s!\n", my_short_id, ntohl(incoming->uid), ntohs(packed_message->type), GNUNET_i2s(&dn->identity));
1493 /* At this point we have a message, and we need to forward it on to the
1496 #if DEBUG_DV_MESSAGES
1497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1498 "%s: FORWARD %s message for %s, uid %u, size %d type %d, cost %u!\n", my_short_id, "DV DATA", GNUNET_i2s(destination), ntohl(incoming->uid), ntohs(packed_message->size), ntohs(packed_message->type), pos->cost);
1502 if (GNUNET_TIME_absolute_get_duration(pos->last_gossip).value < GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 2).value)
1504 delayed_context = GNUNET_malloc(sizeof(struct DelayedMessageContext));
1505 memcpy(&delayed_context->dest, destination, sizeof(struct GNUNET_PeerIdentity));
1506 memcpy(&delayed_context->sender, original_sender, sizeof(struct GNUNET_PeerIdentity));
1507 delayed_context->message = GNUNET_malloc(packed_message_size);
1508 memcpy(delayed_context->message, packed_message, packed_message_size);
1509 delayed_context->message_size = packed_message_size;
1510 delayed_context->uid = ntohl(incoming->uid);
1511 GNUNET_SCHEDULER_add_delayed(sched, GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 2500), &send_message_delayed, delayed_context);
1517 ret = send_message(destination,
1521 packed_message_size,
1522 default_dv_priority,
1523 ntohl(incoming->uid),
1524 GNUNET_TIME_relative_get_forever());
1526 if (ret != GNUNET_SYSERR)
1530 #if DEBUG_MESSAGE_DROP
1531 direct_id = GNUNET_strdup(GNUNET_i2s(&dn->identity));
1532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1533 "%s: DROPPING MESSAGE type %d, forwarding failed! Message immediately from %s!\n", GNUNET_i2s(&my_identity), ntohs(((struct GNUNET_MessageHeader *)&incoming[1])->type), direct_id);
1535 return GNUNET_SYSERR;
1541 * Iterator over hash map entries.
1543 * @param cls closure (NULL)
1544 * @param key current key code
1545 * @param value value in the hash map (DistantNeighbor)
1546 * @return GNUNET_YES if we should continue to
1550 int print_neighbors (void *cls,
1551 const GNUNET_HashCode * key,
1554 struct DistantNeighbor *distant_neighbor = value;
1555 char my_shortname[5];
1556 char referrer_shortname[5];
1557 memcpy(&my_shortname, GNUNET_i2s(&my_identity), 4);
1558 my_shortname[4] = '\0';
1559 memcpy(&referrer_shortname, GNUNET_i2s(&distant_neighbor->referrer->identity), 4);
1560 referrer_shortname[4] = '\0';
1562 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "`%s' %s: Peer `%s', distance %d, referrer `%s' pkey: %s\n", &my_shortname, "DV", GNUNET_i2s(&distant_neighbor->identity), distant_neighbor->cost, &referrer_shortname, distant_neighbor->pkey == NULL ? "no" : "yes");
1568 * Scheduled task which gossips about known direct peers to other connected
1569 * peers. Will run until called with reason shutdown.
1572 neighbor_send_task (void *cls,
1573 const struct GNUNET_SCHEDULER_TaskContext *tc)
1575 struct NeighborSendContext *send_context = cls;
1576 #if DEBUG_DV_GOSSIP_SEND
1577 char * encPeerAbout;
1580 struct DistantNeighbor *about;
1581 struct DirectNeighbor *to;
1582 struct FastGossipNeighborList *about_list;
1584 p2p_dv_MESSAGE_NeighborInfo *message;
1585 struct PendingMessage *pending_message;
1587 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1591 "%s: Called with reason shutdown, shutting down!\n",
1592 GNUNET_i2s(&my_identity));
1597 if (send_context->fast_gossip_list_head != NULL)
1599 about_list = send_context->fast_gossip_list_head;
1600 about = about_list->about;
1601 GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head,
1602 send_context->fast_gossip_list_tail,
1604 GNUNET_free(about_list);
1608 /* FIXME: this may become a problem, because the heap walk has only one internal "walker". This means
1609 * that if two neighbor_send_tasks are operating in lockstep (which is quite possible, given default
1610 * values for all connected peers) there may be a serious bias as to which peers get gossiped about!
1611 * Probably the *best* way to fix would be to have an opaque pointer to the walk position passed as
1612 * part of the walk_get_next call. Then the heap would have to keep a list of walks, or reset the walk
1613 * whenever a modification has been detected. Yuck either way. Perhaps we could iterate over the heap
1614 * once to get a list of peers to gossip about and gossip them over time... But then if one goes away
1615 * in the mean time that becomes nasty. For now we'll just assume that the walking is done
1616 * asynchronously enough to avoid major problems (-;
1618 * NOTE: probably fixed once we decided send rate based on allowed bandwidth.
1620 about = GNUNET_CONTAINER_heap_walk_get_next (neighbor_min_heap);
1622 to = send_context->toNeighbor;
1624 if ((about != NULL) && (to != about->referrer /* split horizon */ ) &&
1626 (about->hidden == GNUNET_NO) &&
1629 (0 != memcmp (&about->identity,
1630 &to->identity, sizeof (struct GNUNET_PeerIdentity))) &&
1631 (about->pkey != NULL))
1633 #if DEBUG_DV_GOSSIP_SEND
1634 encPeerAbout = GNUNET_strdup(GNUNET_i2s(&about->identity));
1635 encPeerTo = GNUNET_strdup(GNUNET_i2s(&to->identity));
1636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1637 "%s: Sending info about peer %s id %u to directly connected peer %s\n",
1638 GNUNET_i2s(&my_identity),
1639 encPeerAbout, about->our_id, encPeerTo);
1640 GNUNET_free(encPeerAbout);
1641 GNUNET_free(encPeerTo);
1643 about->last_gossip = GNUNET_TIME_absolute_get();
1644 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_NeighborInfo));
1645 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1646 pending_message->importance = default_dv_priority;
1647 pending_message->timeout = GNUNET_TIME_relative_get_forever();
1648 memcpy(&pending_message->recipient, &to->identity, sizeof(struct GNUNET_PeerIdentity));
1649 pending_message->msg_size = sizeof(p2p_dv_MESSAGE_NeighborInfo);
1650 message = (p2p_dv_MESSAGE_NeighborInfo *)pending_message->msg;
1651 message->header.size = htons (sizeof (p2p_dv_MESSAGE_NeighborInfo));
1652 message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_GOSSIP);
1653 message->cost = htonl (about->cost);
1654 message->neighbor_id = htonl (about->our_id);
1656 memcpy (&message->pkey, about->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
1657 memcpy (&message->neighbor,
1658 &about->identity, sizeof (struct GNUNET_PeerIdentity));
1660 GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
1665 GNUNET_SCHEDULER_add_now(sched, try_core_send, NULL);
1666 /*if (core_transmit_handle == NULL)
1667 core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, default_dv_priority, GNUNET_TIME_relative_get_forever(), &to->identity, sizeof(p2p_dv_MESSAGE_NeighborInfo), &core_transmit_notify, NULL);*/
1671 if (send_context->fast_gossip_list_head != NULL) /* If there are other peers in the fast list, schedule right away */
1673 #if DEBUG_DV_PEER_NUMBERS
1674 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: still in fast send mode\n");
1676 send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
1680 #if DEBUG_DV_PEER_NUMBERS
1681 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: entering slow send mode\n");
1683 send_context->task = GNUNET_SCHEDULER_add_delayed(sched, GNUNET_DV_DEFAULT_SEND_INTERVAL, &neighbor_send_task, send_context);
1691 * Handle START-message. This is the first message sent to us
1692 * by the client (can only be one!).
1694 * @param cls closure (always NULL)
1695 * @param client identification of the client
1696 * @param message the actual message
1699 handle_start (void *cls,
1700 struct GNUNET_SERVER_Client *client,
1701 const struct GNUNET_MessageHeader *message)
1705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1706 "Received `%s' request from client\n", "START");
1709 client_handle = client;
1711 GNUNET_SERVER_client_keep(client_handle);
1712 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1717 * Iterate over hash map entries for a distant neighbor,
1718 * if direct neighbor matches context call send message
1720 * @param cls closure, a DV_SendContext
1721 * @param key current key code
1722 * @param value value in the hash map
1723 * @return GNUNET_YES if we should continue to
1727 int send_iterator (void *cls,
1728 const GNUNET_HashCode * key,
1731 struct DV_SendContext *send_context = cls;
1732 struct DistantNeighbor *distant_neighbor = value;
1734 if (memcmp(distant_neighbor->referrer, send_context->direct_peer, sizeof(struct GNUNET_PeerIdentity)) == 0) /* They match, send and free */
1736 send_message_via(&my_identity, distant_neighbor, send_context);
1744 * Service server's handler for message send requests (which come
1745 * bubbling up to us through the DV plugin).
1747 * @param cls closure
1748 * @param client identification of the client
1749 * @param message the actual message
1751 void handle_dv_send_message (void *cls,
1752 struct GNUNET_SERVER_Client * client,
1753 const struct GNUNET_MessageHeader * message)
1755 struct GNUNET_DV_SendMessage *send_msg;
1756 struct GNUNET_DV_SendResultMessage *send_result_msg;
1757 struct PendingMessage *pending_message;
1759 size_t message_size;
1760 struct GNUNET_PeerIdentity *destination;
1761 struct GNUNET_PeerIdentity *direct;
1762 struct GNUNET_MessageHeader *message_buf;
1765 static struct GNUNET_CRYPTO_HashAsciiEncoded dest_hash;
1766 struct DV_SendContext *send_context;
1767 #if DEBUG_DV_MESSAGES
1769 struct GNUNET_MessageHeader *packed_message;
1772 if (client_handle == NULL)
1774 client_handle = client;
1775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1776 "%s: Setting initial client handle, never received `%s' message?\n", "dv", "START");
1778 else if (client_handle != client)
1780 client_handle = client;
1781 /* What should we do in this case, assert fail or just log the warning? */
1783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1784 "%s: Setting client handle (was a different client!)!\n", "dv");
1788 GNUNET_assert(ntohs(message->size) > sizeof(struct GNUNET_DV_SendMessage));
1789 send_msg = (struct GNUNET_DV_SendMessage *)message;
1791 address_len = ntohl(send_msg->addrlen);
1792 GNUNET_assert(address_len == sizeof(struct GNUNET_PeerIdentity) * 2);
1793 message_size = ntohs(message->size) - sizeof(struct GNUNET_DV_SendMessage) - address_len;
1794 destination = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity));
1795 direct = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity));
1796 message_buf = GNUNET_malloc(message_size);
1798 temp_pos = (char *)&send_msg[1]; /* Set pointer to end of message */
1799 offset = 0; /* Offset starts at zero */
1801 memcpy(destination, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity));
1802 offset += sizeof(struct GNUNET_PeerIdentity);
1804 memcpy(direct, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity));
1805 offset += sizeof(struct GNUNET_PeerIdentity);
1808 memcpy(message_buf, &temp_pos[offset], message_size);
1809 if (memcmp(&send_msg->target, destination, sizeof(struct GNUNET_PeerIdentity)) != 0)
1811 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1812 dest_hash.encoding[4] = '\0';
1813 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: asked to send message to `%s', but address is for `%s'!", "DV SERVICE", GNUNET_i2s(&send_msg->target), (const char *)&dest_hash.encoding);
1816 #if DEBUG_DV_MESSAGES
1817 cbuf = (char *)message_buf;
1819 while(offset < message_size)
1821 packed_message = (struct GNUNET_MessageHeader *)&cbuf[offset];
1822 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id, ntohl(send_msg->uid), ntohs(packed_message->type), GNUNET_i2s(destination));
1823 offset += ntohs(packed_message->size);
1825 /*GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id, ntohl(send_msg->uid), ntohs(message_buf->type), GNUNET_i2s(destination));*/
1827 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1828 dest_hash.encoding[4] = '\0';
1829 send_context = GNUNET_malloc(sizeof(struct DV_SendContext));
1831 send_result_msg = GNUNET_malloc(sizeof(struct GNUNET_DV_SendResultMessage));
1832 send_result_msg->header.size = htons(sizeof(struct GNUNET_DV_SendResultMessage));
1833 send_result_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND_RESULT);
1834 send_result_msg->uid = send_msg->uid; /* No need to ntohl->htonl this */
1836 send_context->importance = ntohl(send_msg->priority);
1837 send_context->timeout = send_msg->timeout;
1838 send_context->direct_peer = direct;
1839 send_context->distant_peer = destination;
1840 send_context->message = message_buf;
1841 send_context->message_size = message_size;
1842 send_context->send_result = send_result_msg;
1843 #if DEBUG_DV_MESSAGES
1844 send_context->uid = send_msg->uid;
1847 if (send_message_via(&my_identity, direct, send_context) != GNUNET_YES)
1849 send_result_msg->result = htons(1);
1850 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
1851 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1852 memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage));
1853 GNUNET_free(send_result_msg);
1855 GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
1857 if (client_handle != NULL)
1859 if (plugin_transmit_handle == NULL)
1861 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
1862 sizeof(struct GNUNET_DV_SendResultMessage),
1863 GNUNET_TIME_UNIT_FOREVER_REL,
1864 &transmit_to_plugin, NULL);
1868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
1871 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1872 dest_hash.encoding[4] = '\0';
1873 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s DV SEND failed to send message to destination `%s' via `%s'\n", my_short_id, (const char *)&dest_hash.encoding, GNUNET_i2s(direct));
1876 /* In bizarro world GNUNET_SYSERR indicates that we succeeded */
1878 if (GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors, &destination->hashPubKey, &send_iterator, send_context))
1880 send_result_msg->result = htons(1);
1881 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
1882 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1883 memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage));
1884 GNUNET_free(send_result_msg);
1886 GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
1888 if (client_handle != NULL)
1890 if (plugin_transmit_handle == NULL)
1892 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
1893 sizeof(struct GNUNET_DV_SendResultMessage),
1894 GNUNET_TIME_UNIT_FOREVER_REL,
1895 &transmit_to_plugin, NULL);
1899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
1902 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1903 dest_hash.encoding[4] = '\0';
1904 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s DV SEND failed to send message to destination `%s' via `%s'\n", my_short_id, (const char *)&dest_hash.encoding, GNUNET_i2s(direct));
1907 GNUNET_free(message_buf);
1908 GNUNET_free(send_context);
1909 GNUNET_free(direct);
1910 GNUNET_free(destination);
1912 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1915 /** Forward declarations **/
1916 static int handle_dv_gossip_message (void *cls,
1917 const struct GNUNET_PeerIdentity *peer,
1918 const struct GNUNET_MessageHeader *message,
1919 struct GNUNET_TIME_Relative latency,
1922 static int handle_dv_disconnect_message (void *cls,
1923 const struct GNUNET_PeerIdentity *peer,
1924 const struct GNUNET_MessageHeader *message,
1925 struct GNUNET_TIME_Relative latency,
1927 /** End forward declarations **/
1931 * List of handlers for the messages understood by this
1934 * Hmm... will we need to register some handlers with core and
1935 * some handlers with our server here? Because core should be
1936 * getting the incoming DV messages (from whichever lower level
1937 * transport) and then our server should be getting messages
1938 * from the dv_plugin, right?
1940 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1941 {&handle_dv_data_message, GNUNET_MESSAGE_TYPE_DV_DATA, 0},
1942 {&handle_dv_gossip_message, GNUNET_MESSAGE_TYPE_DV_GOSSIP, 0},
1943 {&handle_dv_disconnect_message, GNUNET_MESSAGE_TYPE_DV_DISCONNECT, 0},
1947 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1948 {&handle_dv_send_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0},
1949 {&handle_start, NULL, GNUNET_MESSAGE_TYPE_DV_START, 0},
1954 * Free a DistantNeighbor node, including removing it
1955 * from the referer's list.
1958 distant_neighbor_free (struct DistantNeighbor *referee)
1960 struct DirectNeighbor *referrer;
1962 referrer = referee->referrer;
1963 if (referrer != NULL)
1965 GNUNET_CONTAINER_DLL_remove (referrer->referee_head,
1966 referrer->referee_tail, referee);
1968 GNUNET_CONTAINER_heap_remove_node (neighbor_max_heap, referee->max_loc);
1969 GNUNET_CONTAINER_heap_remove_node (neighbor_min_heap, referee->min_loc);
1970 GNUNET_CONTAINER_multihashmap_remove_all (extended_neighbors,
1971 &referee->identity.hashPubKey);
1972 GNUNET_free_non_null (referee->pkey);
1973 GNUNET_free (referee);
1977 * Free a DirectNeighbor node, including removing it
1978 * from the referer's list.
1981 direct_neighbor_free (struct DirectNeighbor *direct)
1983 struct NeighborSendContext *send_context;
1984 struct FastGossipNeighborList *about_list;
1985 struct FastGossipNeighborList *prev_about;
1987 send_context = direct->send_context;
1989 if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
1990 GNUNET_SCHEDULER_cancel(sched, send_context->task);
1992 about_list = send_context->fast_gossip_list_head;
1993 while (about_list != NULL)
1995 GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head, send_context->fast_gossip_list_tail, about_list);
1996 prev_about = about_list;
1997 about_list = about_list->next;
1998 GNUNET_free(prev_about);
2000 GNUNET_free(send_context);
2001 GNUNET_free(direct);
2005 * Multihashmap iterator for sending out disconnect messages
2008 * @param cls the peer that was disconnected
2009 * @param key key value stored under
2010 * @param value the direct neighbor to send disconnect to
2012 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2014 static int schedule_disconnect_messages (void *cls,
2015 const GNUNET_HashCode * key,
2018 struct DisconnectContext *disconnect_context = cls;
2019 struct DirectNeighbor *disconnected = disconnect_context->direct;
2020 struct DirectNeighbor *notify = value;
2021 struct PendingMessage *pending_message;
2022 p2p_dv_MESSAGE_Disconnect *disconnect_message;
2024 if (memcmp(¬ify->identity, &disconnected->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
2025 return GNUNET_YES; /* Don't send disconnect message to peer that disconnected! */
2027 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_Disconnect));
2028 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
2029 pending_message->importance = default_dv_priority;
2030 pending_message->timeout = GNUNET_TIME_relative_get_forever();
2031 memcpy(&pending_message->recipient, ¬ify->identity, sizeof(struct GNUNET_PeerIdentity));
2032 pending_message->msg_size = sizeof(p2p_dv_MESSAGE_Disconnect);
2033 disconnect_message = (p2p_dv_MESSAGE_Disconnect *)pending_message->msg;
2034 disconnect_message->header.size = htons (sizeof (p2p_dv_MESSAGE_Disconnect));
2035 disconnect_message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DISCONNECT);
2036 disconnect_message->peer_id = htonl(disconnect_context->distant->our_id);
2038 GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
2043 GNUNET_SCHEDULER_add_now(sched, try_core_send, NULL);
2044 /*if (core_transmit_handle == NULL)
2045 core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, default_dv_priority, GNUNET_TIME_relative_get_forever(), ¬ify->identity, sizeof(p2p_dv_MESSAGE_Disconnect), &core_transmit_notify, NULL);*/
2051 * Multihashmap iterator for freeing extended neighbors.
2054 * @param key key value stored under
2055 * @param value the distant neighbor to be freed
2057 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2059 static int free_extended_neighbors (void *cls,
2060 const GNUNET_HashCode * key,
2063 struct DistantNeighbor *distant = value;
2064 distant_neighbor_free(distant);
2069 * Multihashmap iterator for freeing direct neighbors.
2072 * @param key key value stored under
2073 * @param value the direct neighbor to be freed
2075 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2077 static int free_direct_neighbors (void *cls,
2078 const GNUNET_HashCode * key,
2081 struct DirectNeighbor *direct = value;
2082 direct_neighbor_free(direct);
2088 * Task run during shutdown.
2094 shutdown_task (void *cls,
2095 const struct GNUNET_SCHEDULER_TaskContext *tc)
2098 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "calling CORE_DISCONNECT\n");
2099 GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &print_neighbors, NULL);
2101 GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &free_extended_neighbors, NULL);
2102 GNUNET_CONTAINER_multihashmap_destroy(extended_neighbors);
2103 GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &free_direct_neighbors, NULL);
2104 GNUNET_CONTAINER_multihashmap_destroy(direct_neighbors);
2106 GNUNET_CONTAINER_heap_destroy(neighbor_max_heap);
2107 GNUNET_CONTAINER_heap_destroy(neighbor_min_heap);
2109 GNUNET_CORE_disconnect (coreAPI);
2110 GNUNET_PEERINFO_disconnect(peerinfo_handle);
2111 GNUNET_SERVER_mst_destroy(coreMST);
2112 GNUNET_free_non_null(my_short_id);
2114 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "CORE_DISCONNECT completed\n");
2119 * To be called on core init/fail.
2121 void core_init (void *cls,
2122 struct GNUNET_CORE_Handle * server,
2123 const struct GNUNET_PeerIdentity *identity,
2124 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded * publicKey)
2129 GNUNET_SCHEDULER_cancel(sched, cleanup_task);
2130 GNUNET_SCHEDULER_add_now(sched, &shutdown_task, NULL);
2134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2135 "%s: Core connection initialized, I am peer: %s\n", "dv", GNUNET_i2s(identity));
2137 memcpy(&my_identity, identity, sizeof(struct GNUNET_PeerIdentity));
2138 my_short_id = GNUNET_strdup(GNUNET_i2s(&my_identity));
2143 #if PKEY_NO_NEIGHBOR_ON_ADD
2145 * Iterator over hash map entries.
2147 * @param cls closure
2148 * @param key current key code
2149 * @param value value in the hash map
2150 * @return GNUNET_YES if we should continue to
2154 static int add_pkey_to_extended (void *cls,
2155 const GNUNET_HashCode * key,
2158 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey = cls;
2159 struct DistantNeighbor *distant_neighbor = value;
2161 if (distant_neighbor->pkey == NULL)
2163 distant_neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2164 memcpy(distant_neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2172 * Iterator over hash map entries.
2174 * @param cls closure
2175 * @param key current key code
2176 * @param value value in the hash map
2177 * @return GNUNET_YES if we should continue to
2181 static int update_matching_neighbors (void *cls,
2182 const GNUNET_HashCode * key,
2185 struct NeighborUpdateInfo * update_info = cls;
2186 struct DistantNeighbor *distant_neighbor = value;
2188 if (update_info->referrer == distant_neighbor->referrer) /* Direct neighbor matches, update it's info and return GNUNET_NO */
2190 /* same referrer, cost change! */
2191 GNUNET_CONTAINER_heap_update_cost (neighbor_max_heap,
2192 update_info->neighbor->max_loc, update_info->cost);
2193 GNUNET_CONTAINER_heap_update_cost (neighbor_min_heap,
2194 update_info->neighbor->min_loc, update_info->cost);
2195 update_info->neighbor->last_activity = update_info->now;
2196 update_info->neighbor->cost = update_info->cost;
2197 update_info->neighbor->referrer_id = update_info->referrer_peer_id;
2206 * Iterate over all current direct peers, add DISTANT newly connected
2207 * peer to the fast gossip list for that peer so we get DV routing
2208 * information out as fast as possible!
2210 * @param cls the newly connected neighbor we will gossip about
2211 * @param key the hashcode of the peer
2212 * @param value the direct neighbor we should gossip to
2214 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2216 static int add_distant_all_direct_neighbors (void *cls,
2217 const GNUNET_HashCode * key,
2220 struct DirectNeighbor *direct = (struct DirectNeighbor *)value;
2221 struct DistantNeighbor *distant = (struct DistantNeighbor *)cls;
2222 struct NeighborSendContext *send_context = direct->send_context;
2223 struct FastGossipNeighborList *gossip_entry;
2229 if (distant == NULL)
2234 if (memcmp(&direct->identity, &distant->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
2236 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2240 if (distant->hidden == GNUNET_YES)
2241 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2243 gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
2244 gossip_entry->about = distant;
2246 GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
2247 send_context->fast_gossip_list_tail,
2248 send_context->fast_gossip_list_tail,
2251 encPeerAbout = GNUNET_strdup(GNUNET_i2s(&distant->identity));
2252 encPeerTo = GNUNET_strdup(GNUNET_i2s(&direct->identity));
2254 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Fast send info about peer %s id %u for directly connected peer %s\n",
2255 GNUNET_i2s(&my_identity),
2256 encPeerAbout, distant->our_id, encPeerTo);
2257 GNUNET_free(encPeerAbout);
2258 GNUNET_free(encPeerTo);
2260 /*if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
2261 GNUNET_SCHEDULER_cancel(sched, send_context->task);*/
2263 send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
2268 * Callback for hello address creation.
2270 * @param cls closure, a struct HelloContext
2271 * @param max maximum number of bytes that can be written to buf
2272 * @param buf where to write the address information
2274 * @return number of bytes written, 0 to signal the
2275 * end of the iteration.
2278 generate_hello_address (void *cls, size_t max, void *buf)
2280 struct HelloContext *hello_context = cls;
2286 if (hello_context->addresses_to_add == 0)
2289 /* Hello "address" will be concatenation of distant peer and direct peer identities */
2290 size = 2 * sizeof(struct GNUNET_PeerIdentity);
2291 GNUNET_assert(max >= size);
2293 addr_buffer = GNUNET_malloc(size);
2295 /* Copy the distant peer identity to buffer */
2296 memcpy(addr_buffer, &hello_context->distant_peer, sizeof(struct GNUNET_PeerIdentity));
2297 offset += sizeof(struct GNUNET_PeerIdentity);
2298 /* Copy the direct peer identity to buffer */
2299 memcpy(&addr_buffer[offset], hello_context->direct_peer, sizeof(struct GNUNET_PeerIdentity));
2300 ret = GNUNET_HELLO_add_address ("dv",
2301 GNUNET_TIME_relative_to_absolute
2302 (GNUNET_TIME_UNIT_HOURS), addr_buffer, size,
2305 hello_context->addresses_to_add--;
2307 GNUNET_free(addr_buffer);
2313 * Handles when a peer is either added due to being newly connected
2314 * or having been gossiped about, also called when the cost for a neighbor
2315 * needs to be updated.
2317 * @param peer identity of the peer whose info is being added/updated
2318 * @param pkey public key of the peer whose info is being added/updated
2319 * @param referrer_peer_id id to use when sending to 'peer'
2320 * @param referrer if this is a gossiped peer, who did we hear it from?
2321 * @param cost the cost of communicating with this peer via 'referrer'
2323 * @return the added neighbor, the updated neighbor or NULL (neighbor
2326 static struct DistantNeighbor *
2327 addUpdateNeighbor (const struct GNUNET_PeerIdentity * peer, struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey,
2328 unsigned int referrer_peer_id,
2329 struct DirectNeighbor *referrer, unsigned int cost)
2331 struct DistantNeighbor *neighbor;
2332 struct DistantNeighbor *max;
2333 struct GNUNET_TIME_Absolute now;
2334 struct NeighborUpdateInfo *neighbor_update;
2335 struct HelloContext *hello_context;
2336 struct GNUNET_HELLO_Message *hello_msg;
2337 unsigned int our_id;
2342 #if DEBUG_DV_PEER_NUMBERS
2344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2345 "%s Received sender id (%u)!\n", "DV SERVICE", referrer_peer_id);
2348 now = GNUNET_TIME_absolute_get ();
2349 neighbor = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
2351 neighbor_update = GNUNET_malloc(sizeof(struct NeighborUpdateInfo));
2352 neighbor_update->neighbor = neighbor;
2353 neighbor_update->cost = cost;
2354 neighbor_update->now = now;
2355 neighbor_update->referrer = referrer;
2356 neighbor_update->referrer_peer_id = referrer_peer_id;
2358 if (neighbor != NULL)
2361 memcpy(&our_id, &neighbor->identity, sizeof(unsigned int));
2363 our_id = neighbor->our_id;
2369 memcpy(&our_id, peer, sizeof(unsigned int));
2371 our_id = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, RAND_MAX - 1) + 1;
2375 /* Either we do not know this peer, or we already do but via a different immediate peer */
2376 if ((neighbor == NULL) ||
2377 (GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors,
2379 &update_matching_neighbors,
2380 neighbor_update) != GNUNET_SYSERR))
2384 if ((neighbor != NULL) && (cost < neighbor->cost)) /* New cost is less than old, remove old */
2386 distant_neighbor_free(neighbor);
2388 else if (neighbor != NULL) /* Only allow one DV connection to each peer */
2394 if (cost > fisheye_depth)
2397 GNUNET_free(neighbor_update);
2401 #if DEBUG_DV_PEER_NUMBERS
2402 encAbout = GNUNET_strdup(GNUNET_i2s(peer));
2403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2404 "%s: %s Chose NEW id (%u) for peer %s!\n", GNUNET_i2s(&my_identity), "DV SERVICE", our_id, encAbout);
2405 GNUNET_free(encAbout);
2408 if (max_table_size <=
2409 GNUNET_CONTAINER_multihashmap_size (extended_neighbors))
2411 /* remove most expensive entry */
2412 max = GNUNET_CONTAINER_heap_peek (neighbor_max_heap);
2413 GNUNET_assert(max != NULL);
2414 if (cost > max->cost)
2416 /* new entry most expensive, don't create */
2417 GNUNET_free(neighbor_update);
2422 /* only free if this is not a direct connection;
2423 we could theoretically have more direct
2424 connections than DV entries allowed total! */
2425 distant_neighbor_free (max);
2429 neighbor = GNUNET_malloc (sizeof (struct DistantNeighbor));
2430 GNUNET_CONTAINER_DLL_insert (referrer->referee_head,
2431 referrer->referee_tail, neighbor);
2432 neighbor->max_loc = GNUNET_CONTAINER_heap_insert (neighbor_max_heap,
2434 neighbor->min_loc = GNUNET_CONTAINER_heap_insert (neighbor_min_heap,
2436 neighbor->referrer = referrer;
2437 memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
2438 if (pkey != NULL) /* pkey will be null on direct neighbor addition */
2440 neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2441 memcpy (neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2444 neighbor->pkey = pkey;
2446 neighbor->last_activity = now;
2447 neighbor->cost = cost;
2448 neighbor->referrer_id = referrer_peer_id;
2449 neighbor->our_id = our_id;
2451 (cost == DIRECT_NEIGHBOR_COST) ? (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 4) ==
2454 GNUNET_CONTAINER_multihashmap_put (extended_neighbors, &peer->hashPubKey,
2456 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2457 if (referrer_peer_id != 0)
2459 for (i = 0; i< MAX_OUTSTANDING_MESSAGES; i++)
2461 if (referrer->pending_messages[i].sender_id == referrer_peer_id) /* We have a queued message from just learned about peer! */
2463 #if DEBUG_DV_MESSAGES
2464 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: learned about peer %llu from which we have a previous unknown message, processing!\n", my_short_id, referrer_peer_id);
2466 handle_dv_data_message(NULL, &referrer->pending_messages[i].sender, referrer->pending_messages[i].message, referrer->pending_messages[i].latency, referrer->pending_messages[i].distance);
2467 GNUNET_free(referrer->pending_messages[i].message);
2468 referrer->pending_messages[i].sender_id = 0;
2472 if ((cost != DIRECT_NEIGHBOR_COST) && (neighbor->pkey != NULL))
2474 /* Added neighbor, now send HELLO to transport */
2475 hello_context = GNUNET_malloc(sizeof(struct HelloContext));
2476 hello_context->direct_peer = &referrer->identity;
2477 memcpy(&hello_context->distant_peer, peer, sizeof(struct GNUNET_PeerIdentity));
2478 hello_context->addresses_to_add = 1;
2479 hello_msg = GNUNET_HELLO_create(pkey, &generate_hello_address, hello_context);
2480 GNUNET_assert(memcmp(hello_context->direct_peer, &hello_context->distant_peer, sizeof(struct GNUNET_PeerIdentity)) != 0);
2481 addr1 = GNUNET_strdup(GNUNET_i2s(hello_context->direct_peer));
2482 addr2 = GNUNET_strdup(GNUNET_i2s(&hello_context->distant_peer));
2484 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: GIVING HELLO size %d for %s via %s to TRANSPORT\n", my_short_id, GNUNET_HELLO_size(hello_msg), addr2, addr1);
2488 send_to_plugin(hello_context->direct_peer, GNUNET_HELLO_get_header(hello_msg), GNUNET_HELLO_size(hello_msg), &hello_context->distant_peer, cost);
2489 GNUNET_free(hello_context);
2490 GNUNET_free(hello_msg);
2497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2498 "%s: Already know peer %s distance %d, referrer id %d!\n", "dv", GNUNET_i2s(peer), cost, referrer_peer_id);
2502 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2503 "%s: Size of extended_neighbors is %d\n", "dv", GNUNET_CONTAINER_multihashmap_size(extended_neighbors));
2506 GNUNET_free(neighbor_update);
2512 * Core handler for dv disconnect messages. These will be used
2513 * by us to tell transport via the dv plugin that a peer can
2514 * no longer be contacted by us via a certain address. We should
2515 * then propagate these messages on, given that the distance to
2516 * the peer indicates we would have gossiped about it to others.
2518 * @param cls closure
2519 * @param peer peer which sent the message (immediate sender)
2520 * @param message the message
2521 * @param latency the latency of the connection we received the message from
2522 * @param distance the distance to the immediate peer
2524 static int handle_dv_disconnect_message (void *cls,
2525 const struct GNUNET_PeerIdentity *peer,
2526 const struct GNUNET_MessageHeader *message,
2527 struct GNUNET_TIME_Relative latency,
2530 struct DirectNeighbor *referrer;
2531 struct DistantNeighbor *distant;
2532 p2p_dv_MESSAGE_Disconnect *enc_message = (p2p_dv_MESSAGE_Disconnect *)message;
2534 if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_Disconnect))
2536 return GNUNET_SYSERR; /* invalid message */
2539 referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
2541 if (referrer == NULL)
2544 distant = referrer->referee_head;
2545 while (distant != NULL)
2547 if (distant->referrer_id == ntohl(enc_message->peer_id))
2549 distant_neighbor_free(distant);
2551 distant = referrer->referee_head;
2559 * Core handler for dv gossip messages. These will be used
2560 * by us to create a HELLO message for the newly peer containing
2561 * which direct peer we can connect through, and what the cost
2562 * is. This HELLO will then be scheduled for validation by the
2563 * transport service so that it can be used by all others.
2565 * @param cls closure
2566 * @param peer peer which sent the message (immediate sender)
2567 * @param message the message
2568 * @param latency the latency of the connection we received the message from
2569 * @param distance the distance to the immediate peer
2571 static int handle_dv_gossip_message (void *cls,
2572 const struct GNUNET_PeerIdentity *peer,
2573 const struct GNUNET_MessageHeader *message,
2574 struct GNUNET_TIME_Relative latency,
2577 struct DirectNeighbor *referrer;
2578 p2p_dv_MESSAGE_NeighborInfo *enc_message = (p2p_dv_MESSAGE_NeighborInfo *)message;
2580 if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_NeighborInfo))
2582 return GNUNET_SYSERR; /* invalid message */
2585 #if DEBUG_DV_GOSSIP_RECEIPT
2586 char * encPeerAbout;
2589 encPeerAbout = GNUNET_strdup(GNUNET_i2s(&enc_message->neighbor));
2590 encPeerFrom = GNUNET_strdup(GNUNET_i2s(peer));
2591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2592 "%s: Received %s message from peer %s about peer %s id %u distance %d!\n", GNUNET_i2s(&my_identity), "DV GOSSIP", encPeerFrom, encPeerAbout, ntohl(enc_message->neighbor_id), ntohl (enc_message->cost) + 1);
2593 GNUNET_free(encPeerAbout);
2594 GNUNET_free(encPeerFrom);
2597 referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
2599 if (referrer == NULL)
2602 addUpdateNeighbor (&enc_message->neighbor, &enc_message->pkey,
2603 ntohl (enc_message->neighbor_id),
2604 referrer, ntohl (enc_message->cost) + 1);
2611 * Iterate over all currently known peers, add them to the
2612 * fast gossip list for this peer so we get DV routing information
2613 * out as fast as possible!
2615 * @param cls the direct neighbor we will gossip to
2616 * @param key the hashcode of the peer
2617 * @param value the distant neighbor we should add to the list
2619 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2621 static int add_all_extended_peers (void *cls,
2622 const GNUNET_HashCode * key,
2625 struct NeighborSendContext *send_context = (struct NeighborSendContext *)cls;
2626 struct DistantNeighbor *distant = (struct DistantNeighbor *)value;
2627 struct FastGossipNeighborList *gossip_entry;
2629 if (memcmp(&send_context->toNeighbor->identity, &distant->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
2630 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2633 if (distant->hidden == GNUNET_YES)
2634 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2636 gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
2637 gossip_entry->about = distant;
2639 GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
2640 send_context->fast_gossip_list_tail,
2641 send_context->fast_gossip_list_tail,
2649 * Iterator over hash map entries.
2651 * @param cls closure
2652 * @param key current key code
2653 * @param value value in the hash map
2654 * @return GNUNET_YES if we should continue to
2658 static int gossip_all_to_all_iterator (void *cls,
2659 const GNUNET_HashCode * key,
2662 struct DirectNeighbor *direct = value;
2664 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, direct->send_context);
2666 if (direct->send_context->task != GNUNET_SCHEDULER_NO_TASK)
2667 GNUNET_SCHEDULER_cancel(sched, direct->send_context->task);
2669 direct->send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, direct->send_context);
2674 * Task run during shutdown.
2680 gossip_all_to_all (void *cls,
2681 const struct GNUNET_SCHEDULER_TaskContext *tc)
2683 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &gossip_all_to_all_iterator, NULL);
2685 GNUNET_SCHEDULER_add_delayed (sched,
2686 GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5),
2693 * Iterate over all current direct peers, add newly connected peer
2694 * to the fast gossip list for that peer so we get DV routing
2695 * information out as fast as possible!
2697 * @param cls the newly connected neighbor we will gossip about
2698 * @param key the hashcode of the peer
2699 * @param value the direct neighbor we should gossip to
2701 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2703 static int add_all_direct_neighbors (void *cls,
2704 const GNUNET_HashCode * key,
2707 struct DirectNeighbor *direct = (struct DirectNeighbor *)value;
2708 struct DirectNeighbor *to = (struct DirectNeighbor *)cls;
2709 struct DistantNeighbor *distant;
2710 struct NeighborSendContext *send_context = direct->send_context;
2711 struct FastGossipNeighborList *gossip_entry;
2715 distant = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &to->identity.hashPubKey);
2716 if (distant == NULL)
2721 if (memcmp(&direct->identity, &to->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
2723 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2727 if (distant->hidden == GNUNET_YES)
2728 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2730 direct_id = GNUNET_strdup(GNUNET_i2s(&direct->identity));
2732 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: adding peer %s to fast send list for %s\n", my_short_id, GNUNET_i2s(&distant->identity), direct_id);
2734 GNUNET_free(direct_id);
2735 gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
2736 gossip_entry->about = distant;
2738 GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
2739 send_context->fast_gossip_list_tail,
2740 send_context->fast_gossip_list_tail,
2742 if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
2743 GNUNET_SCHEDULER_cancel(sched, send_context->task);
2745 send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, send_context);
2746 //tc.reason = GNUNET_SCHEDULER_REASON_TIMEOUT;
2747 //neighbor_send_task(send_context, &tc);
2752 * Type of an iterator over the hosts. Note that each
2753 * host will be called with each available protocol.
2755 * @param cls closure
2756 * @param peer id of the peer, NULL for last call
2757 * @param hello hello message for the peer (can be NULL)
2758 * @param trust amount of trust we have in the peer
2761 process_peerinfo (void *cls,
2762 const struct GNUNET_PeerIdentity *peer,
2763 const struct GNUNET_HELLO_Message *hello, uint32_t trust)
2765 struct PeerIteratorContext *peerinfo_iterator = cls;
2766 struct DirectNeighbor *neighbor = peerinfo_iterator->neighbor;
2767 struct DistantNeighbor *distant = peerinfo_iterator->distant;
2768 #if DEBUG_DV_PEER_NUMBERS
2775 if (distant->pkey == NULL)
2778 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Failed to get peerinfo information for this peer, retrying!\n");
2780 peerinfo_iterator->ic = GNUNET_PEERINFO_iterate(peerinfo_handle,
2781 &peerinfo_iterator->neighbor->identity,
2783 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3),
2789 GNUNET_free(peerinfo_iterator);
2794 if (memcmp(&neighbor->identity, peer, sizeof(struct GNUNET_PeerIdentity) != 0))
2797 if ((hello != NULL) && (GNUNET_HELLO_get_key (hello, &neighbor->pkey) == GNUNET_OK))
2799 if (distant->pkey == NULL)
2801 distant->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2802 memcpy(distant->pkey, &neighbor->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2805 sent = GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, neighbor->send_context);
2807 #if DEBUG_DV_PEER_NUMBERS
2808 neighbor_pid = GNUNET_strdup(GNUNET_i2s(&neighbor->identity));
2809 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped %d extended peers to %s\n", GNUNET_i2s(&my_identity), sent, neighbor_pid);
2811 sent = GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &add_all_direct_neighbors, neighbor);
2812 #if DEBUG_DV_PEER_NUMBERS
2813 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped about %s to %d direct peers\n", GNUNET_i2s(&my_identity), neighbor_pid, sent);
2814 GNUNET_free(neighbor_pid);
2816 neighbor->send_context->task = GNUNET_SCHEDULER_add_now(sched, &neighbor_send_task, neighbor->send_context);
2822 * Method called whenever a peer connects.
2824 * @param cls closure
2825 * @param peer peer identity this notification is about
2826 * @param latency reported latency of the connection with peer
2827 * @param distance reported distance (DV) to peer
2829 void handle_core_connect (void *cls,
2830 const struct GNUNET_PeerIdentity * peer,
2831 struct GNUNET_TIME_Relative latency,
2834 struct DirectNeighbor *neighbor;
2835 struct DistantNeighbor *about;
2836 struct PeerIteratorContext *peerinfo_iterator;
2839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2840 "%s: Receives core connect message for peer %s distance %d!\n", "dv", GNUNET_i2s(peer), distance);
2843 if ((distance == DIRECT_NEIGHBOR_COST) && (GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL))
2845 peerinfo_iterator = GNUNET_malloc(sizeof(struct PeerIteratorContext));
2846 neighbor = GNUNET_malloc (sizeof (struct DirectNeighbor));
2847 neighbor->send_context = GNUNET_malloc(sizeof(struct NeighborSendContext));
2848 neighbor->send_context->toNeighbor = neighbor;
2849 memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
2851 GNUNET_assert(GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_put (direct_neighbors,
2853 neighbor, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
2854 about = addUpdateNeighbor (peer, NULL, 0, neighbor, DIRECT_NEIGHBOR_COST);
2855 peerinfo_iterator->distant = about;
2856 peerinfo_iterator->neighbor = neighbor;
2857 peerinfo_iterator->ic = GNUNET_PEERINFO_iterate (peerinfo_handle,
2860 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3),
2864 if ((about != NULL) && (about->pkey == NULL))
2867 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Newly added peer %s has NULL pkey!\n", GNUNET_i2s(peer));
2870 else if (about != NULL)
2872 GNUNET_free(peerinfo_iterator);
2877 about = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &peer->hashPubKey);
2878 if ((GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL) && (about != NULL))
2879 sent = GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &add_distant_all_direct_neighbors, about);
2881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2882 "%s: Distance (%d) greater than %d or already know about peer (%s), not re-adding!\n", "dv", distance, DIRECT_NEIGHBOR_COST, GNUNET_i2s(peer));
2889 * Method called whenever a given peer disconnects.
2891 * @param cls closure
2892 * @param peer peer identity this notification is about
2894 void handle_core_disconnect (void *cls,
2895 const struct GNUNET_PeerIdentity * peer)
2897 struct DirectNeighbor *neighbor;
2898 struct DistantNeighbor *referee;
2899 struct FindDestinationContext fdc;
2900 struct DisconnectContext disconnect_context;
2903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2904 "%s: Receives core peer disconnect message!\n", "dv");
2908 GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
2909 if (neighbor == NULL)
2913 while (NULL != (referee = neighbor->referee_head))
2914 distant_neighbor_free (referee);
2919 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &find_distant_peer, &fdc);
2921 if (fdc.dest != NULL)
2923 disconnect_context.direct = neighbor;
2924 disconnect_context.distant = fdc.dest;
2925 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &schedule_disconnect_messages, &disconnect_context);
2928 GNUNET_assert (neighbor->referee_tail == NULL);
2929 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_remove (direct_neighbors,
2930 &peer->hashPubKey, neighbor))
2934 if ((neighbor->send_context != NULL) && (neighbor->send_context->task != GNUNET_SCHEDULER_NO_TASK))
2935 GNUNET_SCHEDULER_cancel(sched, neighbor->send_context->task);
2936 GNUNET_free (neighbor);
2941 * Process dv requests.
2943 * @param cls closure
2944 * @param scheduler scheduler to use
2945 * @param server the initialized server
2946 * @param c configuration to use
2950 struct GNUNET_SCHEDULER_Handle *scheduler,
2951 struct GNUNET_SERVER_Handle *server,
2952 const struct GNUNET_CONFIGURATION_Handle *c)
2954 unsigned long long max_hosts;
2958 /* FIXME: Read from config, or calculate, or something other than this! */
2959 max_hosts = DEFAULT_DIRECT_CONNECTIONS;
2960 max_table_size = DEFAULT_DV_SIZE;
2961 fisheye_depth = DEFAULT_FISHEYE_DEPTH;
2963 if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_direct_connections"))
2964 GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_direct_connections", &max_hosts));
2966 if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_total_connections"))
2967 GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_total_connections", &max_table_size));
2970 if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "fisheye_depth"))
2971 GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "fisheye_depth", &fisheye_depth));
2974 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
2976 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MAX);
2978 direct_neighbors = GNUNET_CONTAINER_multihashmap_create (max_hosts);
2979 extended_neighbors =
2980 GNUNET_CONTAINER_multihashmap_create (max_table_size * 3);
2982 GNUNET_SERVER_add_handlers (server, plugin_handlers);
2984 GNUNET_CORE_connect (sched,
2986 GNUNET_TIME_relative_get_forever(),
2987 NULL, /* FIXME: anything we want to pass around? */
2989 &handle_core_connect,
2990 &handle_core_disconnect,
2997 if (coreAPI == NULL)
3000 coreMST = GNUNET_SERVER_mst_create (&tokenized_message_handler,
3003 peerinfo_handle = GNUNET_PEERINFO_connect(sched, cfg);
3005 if (peerinfo_handle == NULL)
3007 GNUNET_CORE_disconnect(coreAPI);
3011 /* Scheduled the task to clean up when shutdown is called */
3012 cleanup_task = GNUNET_SCHEDULER_add_delayed (sched,
3013 GNUNET_TIME_UNIT_FOREVER_REL,
3020 * The main function for the dv service.
3022 * @param argc number of arguments from the command line
3023 * @param argv command line arguments
3024 * @return 0 ok, 1 on error
3027 main (int argc, char *const *argv)
3029 return (GNUNET_OK ==
3030 GNUNET_SERVICE_run (argc,
3033 GNUNET_SERVICE_OPTION_NONE,
3034 &run, NULL)) ? 0 : 1;