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
8 option) any later version.
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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.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
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"
46 #include "gnunet_statistics_service.h"
50 * For testing mostly, remember only the
51 * shortest path to a distant neighbor.
53 #define AT_MOST_ONE GNUNET_NO
55 #define USE_PEER_ID GNUNET_YES
58 * How many outstanding messages (unknown sender) will we allow per peer?
60 #define MAX_OUTSTANDING_MESSAGES 5
63 * How often do we check about sending out more peer information (if
64 * we are connected to no peers previously).
66 #define GNUNET_DV_DEFAULT_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
69 * How long do we wait at most between sending out information?
71 #define GNUNET_DV_MAX_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
74 * How long can we have not heard from a peer and
75 * still have it in our tables?
77 #define GNUNET_DV_PEER_EXPIRATION_TIME GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 1000))
80 * Priority for gossip.
82 #define GNUNET_DV_DHT_GOSSIP_PRIORITY (GNUNET_EXTREME_PRIORITY / 10)
85 * How often should we check if expiration time has elapsed for
88 #define GNUNET_DV_MAINTAIN_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
91 * How long to allow a message to be delayed?
93 #define DV_DELAY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
96 * Priority to use for DV data messages.
101 * The cost to a direct neighbor. We used to use 0, but 1 makes more sense.
103 #define DIRECT_NEIGHBOR_COST 1
106 * The default number of direct connections to store in DV (max)
108 #define DEFAULT_DIRECT_CONNECTIONS 50
111 * The default size of direct + extended peers in DV (max)
113 #define DEFAULT_DV_SIZE 100
116 * The default fisheye depth, from how many hops away will
119 #define DEFAULT_FISHEYE_DEPTH 4
122 * Linked list of messages to send to clients.
124 struct PendingMessage
127 * Pointer to next item in the list
129 struct PendingMessage *next;
132 * Pointer to previous item in the list
134 struct PendingMessage *prev;
137 * The PeerIdentity to send to
139 struct GNUNET_PeerIdentity recipient;
142 * The result of message sending.
144 struct GNUNET_DV_SendResultMessage *send_result;
147 * Message importance level.
149 unsigned int importance;
154 unsigned int msg_size;
157 * How long to wait before sending message.
159 struct GNUNET_TIME_Relative timeout;
162 * Actual message to be sent; // avoid allocation
164 const struct GNUNET_MessageHeader *msg; // msg = (cast) &pm[1]; // memcpy (&pm[1], data, len);
168 struct FastGossipNeighborList
171 * Next element of DLL
173 struct FastGossipNeighborList *next;
176 * Prev element of DLL
178 struct FastGossipNeighborList *prev;
181 * The neighbor to gossip about
183 struct DistantNeighbor *about;
187 * Context created whenever a direct peer connects to us,
188 * used to gossip other peers to it.
190 struct NeighborSendContext
193 * The peer we will gossip to.
195 struct DirectNeighbor *toNeighbor;
198 * The task associated with this context.
200 GNUNET_SCHEDULER_TaskIdentifier task;
203 * Head of DLL of peers to gossip about
204 * as fast as possible to this peer, for initial
207 struct FastGossipNeighborList *fast_gossip_list_head;
210 * Tail of DLL of peers to gossip about
211 * as fast as possible to this peer, for initial
214 struct FastGossipNeighborList *fast_gossip_list_tail;
220 * Struct to hold information for updating existing neighbors
222 struct NeighborUpdateInfo
230 * The existing neighbor
232 struct DistantNeighbor *neighbor;
235 * The referrer of the possibly existing peer
237 struct DirectNeighbor *referrer;
240 * The time we heard about this peer
242 struct GNUNET_TIME_Absolute now;
245 * Peer id this peer uses to refer to neighbor.
247 unsigned int referrer_peer_id;
252 * Struct to store a single message received with
255 struct UnknownSenderMessage
258 * Message sender (immediate)
260 struct GNUNET_PeerIdentity sender;
263 * The actual message received
265 struct GNUNET_MessageHeader *message;
268 * Latency of connection
270 struct GNUNET_TIME_Relative latency;
273 * Distance to destination
284 * Struct where actual neighbor information is stored,
285 * referenced by min_heap and max_heap. Freeing dealt
286 * with when items removed from hashmap.
288 struct DirectNeighbor
291 * Identity of neighbor.
293 struct GNUNET_PeerIdentity identity;
296 * PublicKey of neighbor.
298 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
301 * Head of DLL of nodes that this direct neighbor referred to us.
303 struct DistantNeighbor *referee_head;
306 * Tail of DLL of nodes that this direct neighbor referred to us.
308 struct DistantNeighbor *referee_tail;
311 * The sending context for gossiping peers to this neighbor.
313 struct NeighborSendContext *send_context;
316 * Is this one of the direct neighbors that we are "hiding"
322 * Save messages immediately from this direct neighbor from a
323 * distan peer we don't know on the chance that it will be
324 * gossiped about and we can deliver the message.
326 struct UnknownSenderMessage pending_messages[MAX_OUTSTANDING_MESSAGES];
331 * Struct where actual neighbor information is stored,
332 * referenced by min_heap and max_heap. Freeing dealt
333 * with when items removed from hashmap.
335 struct DistantNeighbor
338 * We keep distant neighbor's of the same referrer in a DLL.
340 struct DistantNeighbor *next;
343 * We keep distant neighbor's of the same referrer in a DLL.
345 struct DistantNeighbor *prev;
350 struct GNUNET_CONTAINER_HeapNode *min_loc;
355 struct GNUNET_CONTAINER_HeapNode *max_loc;
358 * Identity of referrer (next hop towards 'neighbor').
360 struct DirectNeighbor *referrer;
363 * Identity of neighbor.
365 struct GNUNET_PeerIdentity identity;
368 * PublicKey of neighbor.
370 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey;
373 * Last time we received routing information from this peer
375 struct GNUNET_TIME_Absolute last_activity;
378 * Last time we sent routing information about this peer
380 struct GNUNET_TIME_Absolute last_gossip;
383 * Cost to neighbor, used for actual distance vector computations
388 * Random identifier *we* use for this peer, to be used as shortcut
389 * instead of sending full peer id for each message
394 * Random identifier the *referrer* uses for this peer.
396 unsigned int referrer_id;
399 * Is this one of the direct neighbors that we are "hiding"
406 struct PeerIteratorContext
409 * The actual context, to be freed later.
411 struct GNUNET_PEERINFO_IteratorContext *ic;
414 * The neighbor about which we are concerned.
416 struct DirectNeighbor *neighbor;
419 * The distant neighbor entry for this direct neighbor.
421 struct DistantNeighbor *distant;
426 * Context used for creating hello messages when
427 * gossips are received.
432 * Identity of distant neighbor.
434 struct GNUNET_PeerIdentity distant_peer;
437 * Identity of direct neighbor, via which we send this message.
439 const struct GNUNET_PeerIdentity *direct_peer;
442 * How many addresses do we need to add (always starts at 1, then set to 0)
444 int addresses_to_add;
448 struct DV_SendContext
451 * The distant peer (should always match)
453 struct GNUNET_PeerIdentity *distant_peer;
456 * The direct peer, we need to verify the referrer of.
458 struct GNUNET_PeerIdentity *direct_peer;
461 * The message to be sent
463 struct GNUNET_MessageHeader *message;
466 * The pre-built send result message. Simply needs to be queued
467 * and freed once send has been called!
469 struct GNUNET_DV_SendResultMessage *send_result;
472 * The size of the message being sent, may be larger
473 * than message->header.size because it's multiple
474 * messages packed into one!
479 * How important is this message?
481 unsigned int importance;
484 * Timeout for this message
486 struct GNUNET_TIME_Relative timeout;
489 * Unique ID for DV message
494 struct FindDestinationContext
497 struct DistantNeighbor *dest;
503 struct GNUNET_PeerIdentity *dest;
504 const struct GNUNET_PeerIdentity *via;
507 struct DisconnectContext
510 * Distant neighbor to get pid from.
512 struct DistantNeighbor *distant;
515 * Direct neighbor that disconnected.
517 struct DirectNeighbor *direct;
520 struct TokenizedMessageContext
523 * Immediate sender of this message
525 const struct GNUNET_PeerIdentity *peer;
528 * Distant sender of the message
530 struct DistantNeighbor *distant;
533 * Uid for this set of messages
539 * Context for finding the least cost peer to send to.
540 * Transport selection can only go so far.
542 struct FindLeastCostContext
544 struct DistantNeighbor *target;
545 unsigned int least_cost;
549 * Handle to the core service api.
551 static struct GNUNET_CORE_Handle *coreAPI;
554 * Stream tokenizer to handle messages coming in from core.
556 static struct GNUNET_SERVER_MessageStreamTokenizer *coreMST;
559 * The identity of our peer.
561 static struct GNUNET_PeerIdentity my_identity;
564 * The configuration for this service.
566 static const struct GNUNET_CONFIGURATION_Handle *cfg;
570 * The client, the DV plugin connected to us. Hopefully
571 * this client will never change, although if the plugin dies
572 * and returns for some reason it may happen.
574 static struct GNUNET_SERVER_Client * client_handle;
577 * Task to run when we shut down, cleaning up all our trash
579 static GNUNET_SCHEDULER_TaskIdentifier cleanup_task;
581 static size_t default_dv_priority = 0;
583 static char *my_short_id;
586 * Transmit handle to the plugin.
588 static struct GNUNET_CONNECTION_TransmitHandle * plugin_transmit_handle;
591 * Head of DLL for client messages
593 static struct PendingMessage *plugin_pending_head;
596 * Tail of DLL for client messages
598 static struct PendingMessage *plugin_pending_tail;
601 * Handle to the peerinfo service
603 static struct GNUNET_PEERINFO_Handle *peerinfo_handle;
606 * Transmit handle to core service.
608 static struct GNUNET_CORE_TransmitHandle * core_transmit_handle;
611 * Head of DLL for core messages
613 static struct PendingMessage *core_pending_head;
616 * Tail of DLL for core messages
618 static struct PendingMessage *core_pending_tail;
621 * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for all
622 * directly connected peers.
624 static struct GNUNET_CONTAINER_MultiHashMap *direct_neighbors;
627 * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for
628 * peers connected via DV (extended neighborhood). Does ALSO
629 * include any peers that are in 'direct_neighbors'; for those
630 * peers, the cost will be zero and the referrer all zeros.
632 static struct GNUNET_CONTAINER_MultiHashMap *extended_neighbors;
635 * We use the min heap (min refers to cost) to prefer
636 * gossipping about peers with small costs.
638 static struct GNUNET_CONTAINER_Heap *neighbor_min_heap;
641 * We use the max heap (max refers to cost) for general
642 * iterations over all peers and to remove the most costly
643 * connection if we have too many.
645 static struct GNUNET_CONTAINER_Heap *neighbor_max_heap;
648 * Handle for the statistics service.
650 struct GNUNET_STATISTICS_Handle *stats;
653 * How far out to keep peers we learn about.
655 static unsigned long long fisheye_depth;
658 * How many peers to store at most.
660 static unsigned long long max_table_size;
663 * We've been given a target ID based on the random numbers that
664 * we assigned to our DV-neighborhood. Find the entry for the
665 * respective neighbor.
668 find_destination (void *cls,
669 struct GNUNET_CONTAINER_HeapNode *node,
670 void *element, GNUNET_CONTAINER_HeapCostType cost)
672 struct FindDestinationContext *fdc = cls;
673 struct DistantNeighbor *dn = element;
675 if (fdc->tid != dn->our_id)
683 * We've been given a target ID based on the random numbers that
684 * we assigned to our DV-neighborhood. Find the entry for the
685 * respective neighbor.
688 find_specific_id (void *cls,
689 const GNUNET_HashCode *key,
692 struct FindIDContext *fdc = cls;
693 struct DistantNeighbor *dn = value;
695 if (memcmp(&dn->referrer->identity, fdc->via, sizeof(struct GNUNET_PeerIdentity)) == 0)
697 fdc->tid = dn->referrer_id;
704 * Find a distant peer whose referrer_id matches what we're
705 * looking for. For looking up a peer we've gossipped about
706 * but is now disconnected. Need to do this because we don't
707 * want to remove those that may be accessible via a different
710 static int find_distant_peer (void *cls,
711 const GNUNET_HashCode * key,
714 struct FindDestinationContext *fdc = cls;
715 struct DistantNeighbor *distant = value;
717 if (fdc->tid == distant->referrer_id)
726 * Function called to notify a client about the socket
727 * begin ready to queue more data. "buf" will be
728 * NULL and "size" zero if the socket was closed for
729 * writing in the meantime.
732 * @param size number of bytes available in buf
733 * @param buf where the callee should write the message
734 * @return number of bytes written to buf
736 size_t transmit_to_plugin (void *cls,
737 size_t size, void *buf)
740 struct PendingMessage *reply;
746 /* client disconnected */
747 #if DEBUG_DV_MESSAGES
748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: %s buffer was NULL (client disconnect?)\n", my_short_id, "transmit_to_plugin");
752 plugin_transmit_handle = NULL;
754 while ( (NULL != (reply = plugin_pending_head)) &&
755 (size >= off + (msize = ntohs (reply->msg->size))))
757 GNUNET_CONTAINER_DLL_remove (plugin_pending_head,
760 memcpy (&cbuf[off], reply->msg, msize);
765 if (plugin_pending_head != NULL)
766 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
767 ntohs(plugin_pending_head->msg->size),
768 GNUNET_TIME_UNIT_FOREVER_REL,
769 &transmit_to_plugin, NULL);
775 * Send a message to the dv plugin.
777 * @param sender the direct sender of the message
778 * @param message the message to send to the plugin
779 * (may be an encapsulated type)
780 * @param message_size the size of the message to be sent
781 * @param distant_neighbor the original sender of the message
782 * @param cost the cost to the original sender of the message
784 void send_to_plugin(const struct GNUNET_PeerIdentity * sender,
785 const struct GNUNET_MessageHeader *message,
787 struct GNUNET_PeerIdentity *distant_neighbor,
790 struct GNUNET_DV_MessageReceived *received_msg;
791 struct PendingMessage *pending_message;
792 char *sender_address;
793 size_t sender_address_len;
794 char *packed_msg_start;
798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_to_plugin called with peer %s as sender\n", GNUNET_i2s(distant_neighbor));
801 if (memcmp(sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity)) != 0)
803 sender_address_len = sizeof(struct GNUNET_PeerIdentity) * 2;
804 sender_address = GNUNET_malloc(sender_address_len);
805 memcpy(sender_address, distant_neighbor, sizeof(struct GNUNET_PeerIdentity));
806 memcpy(&sender_address[sizeof(struct GNUNET_PeerIdentity)], sender, sizeof(struct GNUNET_PeerIdentity));
810 sender_address_len = sizeof(struct GNUNET_PeerIdentity);
811 sender_address = GNUNET_malloc(sender_address_len);
812 memcpy(sender_address, sender, sizeof(struct GNUNET_PeerIdentity));
815 size = sizeof(struct GNUNET_DV_MessageReceived) + sender_address_len + message_size;
816 received_msg = GNUNET_malloc(size);
817 received_msg->header.size = htons(size);
818 received_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_RECEIVE);
819 received_msg->distance = htonl(cost);
820 received_msg->msg_len = htonl(message_size);
821 /* Set the sender in this message to be the original sender! */
822 memcpy(&received_msg->sender, distant_neighbor, sizeof(struct GNUNET_PeerIdentity));
823 /* Copy the intermediate sender to the end of the message, this is how the transport identifies this peer */
824 memcpy(&received_msg[1], sender_address, sender_address_len);
825 GNUNET_free(sender_address);
826 /* Copy the actual message after the sender */
827 packed_msg_start = (char *)&received_msg[1];
828 packed_msg_start = &packed_msg_start[sender_address_len];
829 memcpy(packed_msg_start, message, message_size);
830 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + size);
831 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
832 memcpy(&pending_message[1], received_msg, size);
833 GNUNET_free(received_msg);
835 GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
837 if (client_handle != NULL)
839 if (plugin_transmit_handle == NULL)
841 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
842 size, GNUNET_TIME_UNIT_FOREVER_REL,
843 &transmit_to_plugin, NULL);
848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, client_handle not yet set (how?)!\n");
852 /* Declare here so retry_core_send is aware of it */
853 size_t core_transmit_notify (void *cls,
854 size_t size, void *buf);
857 * Try to send another message from our core sending list
860 try_core_send (void *cls,
861 const struct GNUNET_SCHEDULER_TaskContext *tc)
863 struct PendingMessage *pending;
864 pending = core_pending_head;
866 if (core_transmit_handle != NULL)
867 return; /* Message send already in progress */
870 core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, pending->importance, pending->timeout, &pending->recipient, pending->msg_size, &core_transmit_notify, NULL);
874 * Function called to notify a client about the socket
875 * being ready to queue more data. "buf" will be
876 * NULL and "size" zero if the socket was closed for
877 * writing in the meantime.
879 * @param cls closure (NULL)
880 * @param size number of bytes available in buf
881 * @param buf where the callee should write the message
882 * @return number of bytes written to buf
884 size_t core_transmit_notify (void *cls,
885 size_t size, void *buf)
888 struct PendingMessage *pending;
889 struct PendingMessage *client_reply;
895 /* client disconnected */
897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s': buffer was NULL\n", "DHT");
902 core_transmit_handle = NULL;
904 pending = core_pending_head;
905 if ( (pending != NULL) &&
906 (size >= (msize = ntohs (pending->msg->size))))
909 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "`%s' : transmit_notify (core) called with size %d\n", "dv service", msize);
911 GNUNET_CONTAINER_DLL_remove (core_pending_head,
914 if (pending->send_result != NULL) /* Will only be non-null if a real client asked for this send */
916 client_reply = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
917 client_reply->msg = (struct GNUNET_MessageHeader *)&client_reply[1];
918 memcpy(&client_reply[1], pending->send_result, sizeof(struct GNUNET_DV_SendResultMessage));
919 GNUNET_free(pending->send_result);
921 GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, client_reply);
922 if (client_handle != NULL)
924 if (plugin_transmit_handle == NULL)
926 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
927 sizeof(struct GNUNET_DV_SendResultMessage),
928 GNUNET_TIME_UNIT_FOREVER_REL,
929 &transmit_to_plugin, NULL);
933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
937 memcpy (&cbuf[off], pending->msg, msize);
938 GNUNET_free (pending);
941 /*reply = core_pending_head;*/
943 GNUNET_SCHEDULER_add_now(&try_core_send, NULL);
945 core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, reply->importance, reply->timeout, &reply->recipient, reply->msg_size, &core_transmit_notify, NULL);*/
952 * Send a DV data message via DV.
954 * @param sender the original sender of the message
955 * @param recipient the next hop recipient, may be our direct peer, maybe not
956 * @param send_context the send context
959 send_message_via (const struct GNUNET_PeerIdentity *sender,
960 const struct GNUNET_PeerIdentity *recipient,
961 struct DV_SendContext *send_context)
963 p2p_dv_MESSAGE_Data *toSend;
964 unsigned int msg_size;
965 unsigned int recipient_id;
966 unsigned int sender_id;
967 struct DistantNeighbor *source;
968 struct PendingMessage *pending_message;
969 struct FindIDContext find_context;
974 msg_size = send_context->message_size + sizeof (p2p_dv_MESSAGE_Data);
976 find_context.dest = send_context->distant_peer;
977 find_context.via = recipient;
978 find_context.tid = 0;
979 GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors, &send_context->distant_peer->hashPubKey,
980 &find_specific_id, &find_context);
982 if (find_context.tid == 0)
984 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: find_specific_id failed to find peer!\n", my_short_id);
985 /* target unknown to us, drop! */
986 return GNUNET_SYSERR;
988 recipient_id = find_context.tid;
990 if (0 == (memcmp (&my_identity,
991 sender, sizeof (struct GNUNET_PeerIdentity))))
994 source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
995 &sender->hashPubKey);
997 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));
1001 source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1002 &sender->hashPubKey);
1005 /* sender unknown to us, drop! */
1006 return GNUNET_SYSERR;
1008 sender_id = source->our_id;
1011 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + msg_size);
1012 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1013 pending_message->send_result = send_context->send_result;
1014 memcpy(&pending_message->recipient, recipient, sizeof(struct GNUNET_PeerIdentity));
1015 pending_message->msg_size = msg_size;
1016 pending_message->importance = send_context->importance;
1017 pending_message->timeout = send_context->timeout;
1018 toSend = (p2p_dv_MESSAGE_Data *)pending_message->msg;
1019 toSend->header.size = htons (msg_size);
1020 toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA);
1021 toSend->sender = htonl (sender_id);
1022 toSend->recipient = htonl (recipient_id);
1023 #if DEBUG_DV_MESSAGES
1024 toSend->uid = send_context->uid; /* Still sent around in network byte order */
1026 toSend->uid = htonl(0);
1029 memcpy (&toSend[1], send_context->message, send_context->message_size);
1032 memcpy(&shortname, GNUNET_i2s(send_context->distant_peer), 4);
1033 shortname[4] = '\0';
1034 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);
1037 GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
1042 GNUNET_SCHEDULER_add_now(try_core_send, NULL);
1048 * Given a FindLeastCostContext, and a set
1049 * of peers that match the target, return the cheapest.
1051 * @param cls closure, a struct FindLeastCostContext
1052 * @param key the key identifying the target peer
1053 * @param value the target peer
1055 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
1058 find_least_cost_peer (void *cls,
1059 const GNUNET_HashCode *key,
1062 struct FindLeastCostContext *find_context = cls;
1063 struct DistantNeighbor *dn = value;
1065 if (dn->cost < find_context->least_cost)
1067 find_context->target = dn;
1069 if (dn->cost == DIRECT_NEIGHBOR_COST)
1075 * Send a DV data message via DV.
1077 * @param recipient the ultimate recipient of this message
1078 * @param sender the original sender of the message
1079 * @param specific_neighbor the specific neighbor to send this message via
1080 * @param message the packed message
1081 * @param message_size size of the message
1082 * @param importance what priority to send this message with
1083 * @param uid the unique identifier of this message (or 0 for none)
1084 * @param timeout how long to possibly delay sending this message
1087 send_message (const struct GNUNET_PeerIdentity * recipient,
1088 const struct GNUNET_PeerIdentity * sender,
1089 const struct DistantNeighbor * specific_neighbor,
1090 const struct GNUNET_MessageHeader * message,
1091 size_t message_size,
1092 unsigned int importance,
1094 struct GNUNET_TIME_Relative timeout)
1096 p2p_dv_MESSAGE_Data *toSend;
1097 unsigned int msg_size;
1099 unsigned int recipient_id;
1100 unsigned int sender_id;
1101 struct DistantNeighbor *target;
1102 struct DistantNeighbor *source;
1103 struct PendingMessage *pending_message;
1104 struct FindLeastCostContext find_least_ctx;
1105 #if DEBUG_DV_PEER_NUMBERS
1106 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerFrom;
1107 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerTo;
1108 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerVia;
1110 msg_size = message_size + sizeof (p2p_dv_MESSAGE_Data);
1112 find_least_ctx.least_cost = -1;
1113 find_least_ctx.target = NULL;
1115 * Need to find the least cost peer, lest the transport selection keep
1116 * picking the same DV route for the same destination which results
1117 * in messages looping forever. Relatively cheap, we don't iterate
1118 * over all known peers, just those that apply.
1120 GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors,
1121 &recipient->hashPubKey, &find_least_cost_peer, &find_least_ctx);
1122 target = find_least_ctx.target;
1126 /* target unknown to us, drop! */
1127 return GNUNET_SYSERR;
1129 recipient_id = target->referrer_id;
1131 source = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1132 &sender->hashPubKey);
1135 if (0 != (memcmp (&my_identity,
1136 sender, sizeof (struct GNUNET_PeerIdentity))))
1138 /* sender unknown to us, drop! */
1139 return GNUNET_SYSERR;
1141 sender_id = 0; /* 0 == us */
1145 /* find out the number that we use when we gossip about
1147 sender_id = source->our_id;
1150 #if DEBUG_DV_PEER_NUMBERS
1151 GNUNET_CRYPTO_hash_to_enc (&source->identity.hashPubKey, &encPeerFrom);
1152 GNUNET_CRYPTO_hash_to_enc (&target->referrer->identity.hashPubKey, &encPeerVia);
1153 encPeerFrom.encoding[4] = '\0';
1154 encPeerVia.encoding[4] = '\0';
1156 if ((sender_id != 0) && (0 == memcmp(&source->identity, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity))))
1161 cost = target->cost;
1162 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + msg_size);
1163 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1164 pending_message->send_result = NULL;
1165 pending_message->importance = importance;
1166 pending_message->timeout = timeout;
1167 memcpy(&pending_message->recipient, &target->referrer->identity, sizeof(struct GNUNET_PeerIdentity));
1168 pending_message->msg_size = msg_size;
1169 toSend = (p2p_dv_MESSAGE_Data *)pending_message->msg;
1170 toSend->header.size = htons (msg_size);
1171 toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA);
1172 toSend->sender = htonl (sender_id);
1173 toSend->recipient = htonl (recipient_id);
1174 #if DEBUG_DV_MESSAGES
1175 toSend->uid = htonl(uid);
1177 toSend->uid = htonl(0);
1180 #if DEBUG_DV_PEER_NUMBERS
1181 GNUNET_CRYPTO_hash_to_enc (&target->identity.hashPubKey, &encPeerTo);
1182 encPeerTo.encoding[4] = '\0';
1183 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);
1185 memcpy (&toSend[1], message, message_size);
1186 if ((source != NULL) && (source->pkey == NULL)) /* Test our hypothesis about message failures! */
1188 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: Sending message, but anticipate recipient will not know sender!!!\n\n\n", my_short_id);
1190 GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
1195 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));
1198 GNUNET_SCHEDULER_add_now(try_core_send, NULL);
1203 struct CheckPeerContext
1208 struct DistantNeighbor *peer;
1211 * Sender id to search for
1213 unsigned int sender_id;
1217 * Iterator over hash map entries.
1219 * @param cls closure
1220 * @param key current key code
1221 * @param value value in the hash map
1222 * @return GNUNET_YES if we should continue to
1226 int checkPeerID (void *cls,
1227 const GNUNET_HashCode * key,
1230 struct CheckPeerContext *ctx = cls;
1231 struct DistantNeighbor *distant = value;
1233 if (memcmp(key, &ctx->sender_id, sizeof(unsigned int)) == 0)
1235 ctx->peer = distant;
1245 * Handler for messages parsed out by the tokenizer from
1246 * DV DATA received for this peer.
1249 * @param client the TokenizedMessageContext which contains message information
1250 * @param message the actual message
1252 void tokenized_message_handler (void *cls,
1254 const struct GNUNET_MessageHeader *message)
1256 struct TokenizedMessageContext *ctx = client;
1257 GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP);
1258 GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA);
1259 if ( (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP) &&
1260 (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA) )
1262 #if DEBUG_DV_MESSAGES
1263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1264 "%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));
1266 GNUNET_assert(memcmp(ctx->peer, &ctx->distant->identity, sizeof(struct GNUNET_PeerIdentity)) != 0);
1267 send_to_plugin(ctx->peer, message, ntohs(message->size), &ctx->distant->identity, ctx->distant->cost);
1272 struct DelayedMessageContext
1274 struct GNUNET_PeerIdentity dest;
1275 struct GNUNET_PeerIdentity sender;
1276 struct GNUNET_MessageHeader *message;
1277 size_t message_size;
1281 void send_message_delayed (void *cls,
1282 const struct GNUNET_SCHEDULER_TaskContext *tc)
1284 struct DelayedMessageContext *msg_ctx = cls;
1285 if (msg_ctx != NULL)
1287 send_message(&msg_ctx->dest,
1291 msg_ctx->message_size,
1292 default_dv_priority,
1294 GNUNET_TIME_relative_get_forever());
1295 GNUNET_free(msg_ctx->message);
1296 GNUNET_free(msg_ctx);
1303 * Core handler for dv data messages. Whatever this message
1304 * contains all we really have to do is rip it out of its
1305 * DV layering and give it to our pal the DV plugin to report
1308 * @param cls closure
1309 * @param peer peer which sent the message (immediate sender)
1310 * @param message the message
1311 * @param latency the latency of the connection we received the message from
1312 * @param distance the distance to the immediate peer
1314 static int handle_dv_data_message (void *cls,
1315 const struct GNUNET_PeerIdentity * peer,
1316 const struct GNUNET_MessageHeader * message,
1317 struct GNUNET_TIME_Relative latency,
1320 const p2p_dv_MESSAGE_Data *incoming = (const p2p_dv_MESSAGE_Data *) message;
1321 const struct GNUNET_MessageHeader *packed_message;
1322 struct DirectNeighbor *dn;
1323 struct DistantNeighbor *pos;
1324 unsigned int sid; /* Sender id */
1325 unsigned int tid; /* Target id */
1326 struct GNUNET_PeerIdentity *original_sender;
1327 struct GNUNET_PeerIdentity *destination;
1328 struct FindDestinationContext fdc;
1329 struct TokenizedMessageContext tkm_ctx;
1333 struct DelayedMessageContext *delayed_context;
1336 struct CheckPeerContext checkPeerCtx;
1338 #if DEBUG_DV_MESSAGES
1342 size_t packed_message_size;
1345 packed_message_size = ntohs(incoming->header.size) - sizeof(p2p_dv_MESSAGE_Data);
1347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1348 "%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);
1351 if (ntohs (incoming->header.size) < sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader))
1355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1356 "`%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));
1358 return GNUNET_SYSERR;
1361 dn = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
1366 sid = ntohl (incoming->sender);
1370 checkPeerCtx.sender_id = sid;
1371 checkPeerCtx.peer = NULL;
1372 GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &checkPeerID, &checkPeerCtx);
1373 pos = checkPeerCtx.peer;
1377 pos = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1381 pos = dn->referee_head;
1382 while ((NULL != pos) && (pos->referrer_id != sid))
1388 #if DEBUG_DV_MESSAGES
1389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1390 "%s: unknown sender (%u), Message uid %u from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity));
1391 pos = dn->referee_head;
1392 while ((NULL != pos) && (pos->referrer_id != sid))
1394 sender_id = strdup(GNUNET_i2s(&pos->identity));
1395 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "I know sender %u %s\n", pos->referrer_id, sender_id);
1396 GNUNET_free(sender_id);
1400 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1401 "%s: unknown sender (%u), Message uid %u from %s!\n", my_short_id, ntohl(incoming->sender), ntohl(incoming->uid), GNUNET_i2s(&dn->identity));
1404 for (i = 0; i< MAX_OUTSTANDING_MESSAGES; i++)
1406 if (dn->pending_messages[i].sender_id == 0)
1413 if (found_pos == -1)
1415 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1416 "%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));
1420 dn->pending_messages[found_pos].message = GNUNET_malloc(ntohs (message->size));
1421 memcpy(dn->pending_messages[found_pos].message, message, ntohs(message->size));
1422 dn->pending_messages[found_pos].distance = distance;
1423 dn->pending_messages[found_pos].latency = latency;
1424 memcpy(&dn->pending_messages[found_pos].sender, peer, sizeof(struct GNUNET_PeerIdentity));
1425 dn->pending_messages[found_pos].sender_id = sid;
1427 /* unknown sender */
1430 original_sender = &pos->identity;
1431 tid = ntohl (incoming->recipient);
1435 cbuf = (char *)&incoming[1];
1437 tkm_ctx.peer = peer;
1438 tkm_ctx.distant = pos;
1439 tkm_ctx.uid = ntohl(incoming->uid);
1440 if (GNUNET_OK != GNUNET_SERVER_mst_receive (coreMST,
1443 packed_message_size,
1448 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: %s Received corrupt data, discarding!", my_short_id, "DV SERVICE");
1454 packed_message = (struct GNUNET_MessageHeader *)&incoming[1];
1457 /* FIXME: this is the *only* per-request operation we have in DV
1458 that is O(n) in relation to the number of connected peers; a
1459 hash-table lookup could easily solve this (minor performance
1463 GNUNET_CONTAINER_heap_iterate (neighbor_max_heap,
1464 &find_destination, &fdc);
1467 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1468 "%s: Receives %s message for someone else!\n", "dv", "DV DATA");
1471 if (fdc.dest == NULL)
1473 #if DEBUG_DV_MESSAGES
1474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1475 "%s: Receives %s message uid %u for someone we don't know (id %u)!\n", my_short_id, "DV DATA", ntohl(incoming->uid), tid);
1479 destination = &fdc.dest->identity;
1481 if (0 == memcmp (destination, peer, sizeof (struct GNUNET_PeerIdentity)))
1483 /* FIXME: create stat: routing loop-discard! */
1484 #if DEBUG_DV_PEER_NUMBERS
1485 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "\n\n\nLoopy loo message\n\n\n");
1488 #if DEBUG_DV_MESSAGES
1489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1490 "%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));
1495 /* At this point we have a message, and we need to forward it on to the
1498 #if DEBUG_DV_MESSAGES
1499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1500 "%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);
1504 if (GNUNET_TIME_absolute_get_duration(pos->last_gossip).abs_value < GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 2).abs_value)
1506 delayed_context = GNUNET_malloc(sizeof(struct DelayedMessageContext));
1507 memcpy(&delayed_context->dest, destination, sizeof(struct GNUNET_PeerIdentity));
1508 memcpy(&delayed_context->sender, original_sender, sizeof(struct GNUNET_PeerIdentity));
1509 delayed_context->message = GNUNET_malloc(packed_message_size);
1510 memcpy(delayed_context->message, packed_message, packed_message_size);
1511 delayed_context->message_size = packed_message_size;
1512 delayed_context->uid = ntohl(incoming->uid);
1513 GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 2500), &send_message_delayed, delayed_context);
1519 ret = send_message(destination,
1523 packed_message_size,
1524 default_dv_priority,
1525 ntohl(incoming->uid),
1526 GNUNET_TIME_relative_get_forever());
1528 if (ret != GNUNET_SYSERR)
1532 #if DEBUG_MESSAGE_DROP
1533 char *direct_id = GNUNET_strdup(GNUNET_i2s(&dn->identity));
1534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1535 "%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);
1536 GNUNET_free (direct_id);
1538 return GNUNET_SYSERR;
1544 * Iterator over hash map entries.
1546 * @param cls closure (NULL)
1547 * @param key current key code
1548 * @param value value in the hash map (DistantNeighbor)
1549 * @return GNUNET_YES if we should continue to
1553 int print_neighbors (void *cls,
1554 const GNUNET_HashCode * key,
1557 struct DistantNeighbor *distant_neighbor = abs_value;
1558 char my_shortname[5];
1559 char referrer_shortname[5];
1560 memcpy(&my_shortname, GNUNET_i2s(&my_identity), 4);
1561 my_shortname[4] = '\0';
1562 memcpy(&referrer_shortname, GNUNET_i2s(&distant_neighbor->referrer->identity), 4);
1563 referrer_shortname[4] = '\0';
1565 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");
1571 * Scheduled task which gossips about known direct peers to other connected
1572 * peers. Will run until called with reason shutdown.
1575 neighbor_send_task (void *cls,
1576 const struct GNUNET_SCHEDULER_TaskContext *tc)
1578 struct NeighborSendContext *send_context = cls;
1579 #if DEBUG_DV_GOSSIP_SEND
1580 char * encPeerAbout;
1583 struct DistantNeighbor *about;
1584 struct DirectNeighbor *to;
1585 struct FastGossipNeighborList *about_list;
1587 p2p_dv_MESSAGE_NeighborInfo *message;
1588 struct PendingMessage *pending_message;
1590 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1594 "%s: Called with reason shutdown, shutting down!\n",
1595 GNUNET_i2s(&my_identity));
1600 if (send_context->fast_gossip_list_head != NULL)
1602 about_list = send_context->fast_gossip_list_head;
1603 about = about_list->about;
1604 GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head,
1605 send_context->fast_gossip_list_tail,
1607 GNUNET_free(about_list);
1611 /* FIXME: this may become a problem, because the heap walk has only one internal "walker". This means
1612 * that if two neighbor_send_tasks are operating in lockstep (which is quite possible, given default
1613 * values for all connected peers) there may be a serious bias as to which peers get gossiped about!
1614 * Probably the *best* way to fix would be to have an opaque pointer to the walk position passed as
1615 * part of the walk_get_next call. Then the heap would have to keep a list of walks, or reset the walk
1616 * whenever a modification has been detected. Yuck either way. Perhaps we could iterate over the heap
1617 * once to get a list of peers to gossip about and gossip them over time... But then if one goes away
1618 * in the mean time that becomes nasty. For now we'll just assume that the walking is done
1619 * asynchronously enough to avoid major problems (-;
1621 * NOTE: probably fixed once we decided send rate based on allowed bandwidth.
1623 about = GNUNET_CONTAINER_heap_walk_get_next (neighbor_min_heap);
1625 to = send_context->toNeighbor;
1627 if ((about != NULL) && (to != about->referrer /* split horizon */ ) &&
1629 (about->hidden == GNUNET_NO) &&
1632 (0 != memcmp (&about->identity,
1633 &to->identity, sizeof (struct GNUNET_PeerIdentity))) &&
1634 (about->pkey != NULL))
1636 #if DEBUG_DV_GOSSIP_SEND
1637 encPeerAbout = GNUNET_strdup(GNUNET_i2s(&about->identity));
1638 encPeerTo = GNUNET_strdup(GNUNET_i2s(&to->identity));
1639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1640 "%s: Sending info about peer %s id %u to directly connected peer %s\n",
1641 GNUNET_i2s(&my_identity),
1642 encPeerAbout, about->our_id, encPeerTo);
1643 GNUNET_free(encPeerAbout);
1644 GNUNET_free(encPeerTo);
1646 about->last_gossip = GNUNET_TIME_absolute_get();
1647 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_NeighborInfo));
1648 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1649 pending_message->importance = default_dv_priority;
1650 pending_message->timeout = GNUNET_TIME_relative_get_forever();
1651 memcpy(&pending_message->recipient, &to->identity, sizeof(struct GNUNET_PeerIdentity));
1652 pending_message->msg_size = sizeof(p2p_dv_MESSAGE_NeighborInfo);
1653 message = (p2p_dv_MESSAGE_NeighborInfo *)pending_message->msg;
1654 message->header.size = htons (sizeof (p2p_dv_MESSAGE_NeighborInfo));
1655 message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_GOSSIP);
1656 message->cost = htonl (about->cost);
1657 message->neighbor_id = htonl (about->our_id);
1659 memcpy (&message->pkey, about->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
1660 memcpy (&message->neighbor,
1661 &about->identity, sizeof (struct GNUNET_PeerIdentity));
1663 GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
1668 GNUNET_SCHEDULER_add_now(try_core_send, NULL);
1669 /*if (core_transmit_handle == NULL)
1670 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);*/
1674 if (send_context->fast_gossip_list_head != NULL) /* If there are other peers in the fast list, schedule right away */
1676 #if DEBUG_DV_PEER_NUMBERS
1677 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: still in fast send mode\n");
1679 send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, send_context);
1683 #if DEBUG_DV_PEER_NUMBERS
1684 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "DV SERVICE: entering slow send mode\n");
1686 send_context->task = GNUNET_SCHEDULER_add_delayed(GNUNET_DV_DEFAULT_SEND_INTERVAL, &neighbor_send_task, send_context);
1694 * Handle START-message. This is the first message sent to us
1695 * by the client (can only be one!).
1697 * @param cls closure (always NULL)
1698 * @param client identification of the client
1699 * @param message the actual message
1702 handle_start (void *cls,
1703 struct GNUNET_SERVER_Client *client,
1704 const struct GNUNET_MessageHeader *message)
1708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1709 "Received `%s' request from client\n", "START");
1712 client_handle = client;
1714 GNUNET_SERVER_client_keep(client_handle);
1715 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1720 * Iterate over hash map entries for a distant neighbor,
1721 * if direct neighbor matches context call send message
1723 * @param cls closure, a DV_SendContext
1724 * @param key current key code
1725 * @param value value in the hash map
1726 * @return GNUNET_YES if we should continue to
1730 int send_iterator (void *cls,
1731 const GNUNET_HashCode * key,
1734 struct DV_SendContext *send_context = cls;
1735 struct DistantNeighbor *distant_neighbor = abs_value;
1737 if (memcmp(distant_neighbor->referrer, send_context->direct_peer, sizeof(struct GNUNET_PeerIdentity)) == 0) /* They match, send and free */
1739 send_message_via(&my_identity, distant_neighbor, send_context);
1747 * Service server's handler for message send requests (which come
1748 * bubbling up to us through the DV plugin).
1750 * @param cls closure
1751 * @param client identification of the client
1752 * @param message the actual message
1754 void handle_dv_send_message (void *cls,
1755 struct GNUNET_SERVER_Client * client,
1756 const struct GNUNET_MessageHeader * message)
1758 struct GNUNET_DV_SendMessage *send_msg;
1759 struct GNUNET_DV_SendResultMessage *send_result_msg;
1760 struct PendingMessage *pending_message;
1762 size_t message_size;
1763 struct GNUNET_PeerIdentity *destination;
1764 struct GNUNET_PeerIdentity *direct;
1765 struct GNUNET_MessageHeader *message_buf;
1768 static struct GNUNET_CRYPTO_HashAsciiEncoded dest_hash;
1769 struct DV_SendContext *send_context;
1770 #if DEBUG_DV_MESSAGES
1772 struct GNUNET_MessageHeader *packed_message;
1775 if (client_handle == NULL)
1777 client_handle = client;
1778 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1779 "%s: Setting initial client handle, never received `%s' message?\n", "dv", "START");
1781 else if (client_handle != client)
1783 client_handle = client;
1784 /* What should we do in this case, assert fail or just log the warning? */
1786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1787 "%s: Setting client handle (was a different client!)!\n", "dv");
1791 GNUNET_assert(ntohs(message->size) > sizeof(struct GNUNET_DV_SendMessage));
1792 send_msg = (struct GNUNET_DV_SendMessage *)message;
1794 address_len = ntohl(send_msg->addrlen);
1795 GNUNET_assert(address_len == sizeof(struct GNUNET_PeerIdentity) * 2);
1796 message_size = ntohs(message->size) - sizeof(struct GNUNET_DV_SendMessage) - address_len;
1797 destination = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity));
1798 direct = GNUNET_malloc(sizeof(struct GNUNET_PeerIdentity));
1799 message_buf = GNUNET_malloc(message_size);
1801 temp_pos = (char *)&send_msg[1]; /* Set pointer to end of message */
1802 offset = 0; /* Offset starts at zero */
1804 memcpy(destination, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity));
1805 offset += sizeof(struct GNUNET_PeerIdentity);
1807 memcpy(direct, &temp_pos[offset], sizeof(struct GNUNET_PeerIdentity));
1808 offset += sizeof(struct GNUNET_PeerIdentity);
1811 memcpy(message_buf, &temp_pos[offset], message_size);
1812 if (memcmp(&send_msg->target, destination, sizeof(struct GNUNET_PeerIdentity)) != 0)
1814 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1815 dest_hash.encoding[4] = '\0';
1816 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);
1819 #if DEBUG_DV_MESSAGES
1820 cbuf = (char *)message_buf;
1822 while(offset < message_size)
1824 packed_message = (struct GNUNET_MessageHeader *)&cbuf[offset];
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(packed_message->type), GNUNET_i2s(destination));
1826 offset += ntohs(packed_message->size);
1828 /*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));*/
1830 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1831 dest_hash.encoding[4] = '\0';
1832 send_context = GNUNET_malloc(sizeof(struct DV_SendContext));
1834 send_result_msg = GNUNET_malloc(sizeof(struct GNUNET_DV_SendResultMessage));
1835 send_result_msg->header.size = htons(sizeof(struct GNUNET_DV_SendResultMessage));
1836 send_result_msg->header.type = htons(GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND_RESULT);
1837 send_result_msg->uid = send_msg->uid; /* No need to ntohl->htonl this */
1839 send_context->importance = ntohl(send_msg->priority);
1840 send_context->timeout = send_msg->timeout;
1841 send_context->direct_peer = direct;
1842 send_context->distant_peer = destination;
1843 send_context->message = message_buf;
1844 send_context->message_size = message_size;
1845 send_context->send_result = send_result_msg;
1846 #if DEBUG_DV_MESSAGES
1847 send_context->uid = send_msg->uid;
1850 if (send_message_via(&my_identity, direct, send_context) != GNUNET_YES)
1852 send_result_msg->result = htons(1);
1853 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
1854 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1855 memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage));
1856 GNUNET_free(send_result_msg);
1858 GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
1860 if (client_handle != NULL)
1862 if (plugin_transmit_handle == NULL)
1864 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
1865 sizeof(struct GNUNET_DV_SendResultMessage),
1866 GNUNET_TIME_UNIT_FOREVER_REL,
1867 &transmit_to_plugin, NULL);
1871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
1874 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1875 dest_hash.encoding[4] = '\0';
1876 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));
1879 /* In bizarro world GNUNET_SYSERR indicates that we succeeded */
1881 if (GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors, &destination->hashPubKey, &send_iterator, send_context))
1883 send_result_msg->result = htons(1);
1884 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(struct GNUNET_DV_SendResultMessage));
1885 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
1886 memcpy(&pending_message[1], send_result_msg, sizeof(struct GNUNET_DV_SendResultMessage));
1887 GNUNET_free(send_result_msg);
1889 GNUNET_CONTAINER_DLL_insert_after(plugin_pending_head, plugin_pending_tail, plugin_pending_tail, pending_message);
1891 if (client_handle != NULL)
1893 if (plugin_transmit_handle == NULL)
1895 plugin_transmit_handle = GNUNET_SERVER_notify_transmit_ready (client_handle,
1896 sizeof(struct GNUNET_DV_SendResultMessage),
1897 GNUNET_TIME_UNIT_FOREVER_REL,
1898 &transmit_to_plugin, NULL);
1902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Failed to queue message for plugin, must be one in progress already!!\n");
1905 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1906 dest_hash.encoding[4] = '\0';
1907 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));
1910 GNUNET_free(message_buf);
1911 GNUNET_free(send_context);
1912 GNUNET_free(direct);
1913 GNUNET_free(destination);
1915 GNUNET_SERVER_receive_done(client, GNUNET_OK);
1918 /** Forward declarations **/
1919 static int handle_dv_gossip_message (void *cls,
1920 const struct GNUNET_PeerIdentity *peer,
1921 const struct GNUNET_MessageHeader *message,
1922 struct GNUNET_TIME_Relative latency,
1925 static int handle_dv_disconnect_message (void *cls,
1926 const struct GNUNET_PeerIdentity *peer,
1927 const struct GNUNET_MessageHeader *message,
1928 struct GNUNET_TIME_Relative latency,
1930 /** End forward declarations **/
1934 * List of handlers for the messages understood by this
1937 * Hmm... will we need to register some handlers with core and
1938 * some handlers with our server here? Because core should be
1939 * getting the incoming DV messages (from whichever lower level
1940 * transport) and then our server should be getting messages
1941 * from the dv_plugin, right?
1943 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1944 {&handle_dv_data_message, GNUNET_MESSAGE_TYPE_DV_DATA, 0},
1945 {&handle_dv_gossip_message, GNUNET_MESSAGE_TYPE_DV_GOSSIP, 0},
1946 {&handle_dv_disconnect_message, GNUNET_MESSAGE_TYPE_DV_DISCONNECT, 0},
1950 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
1951 {&handle_dv_send_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0},
1952 {&handle_start, NULL, GNUNET_MESSAGE_TYPE_DV_START, 0},
1957 * Free a DistantNeighbor node, including removing it
1958 * from the referer's list.
1961 distant_neighbor_free (struct DistantNeighbor *referee)
1963 struct DirectNeighbor *referrer;
1965 referrer = referee->referrer;
1966 if (referrer != NULL)
1968 GNUNET_CONTAINER_DLL_remove (referrer->referee_head,
1969 referrer->referee_tail, referee);
1971 GNUNET_CONTAINER_heap_remove_node (neighbor_max_heap, referee->max_loc);
1972 GNUNET_CONTAINER_heap_remove_node (neighbor_min_heap, referee->min_loc);
1973 GNUNET_CONTAINER_multihashmap_remove_all (extended_neighbors,
1974 &referee->identity.hashPubKey);
1975 GNUNET_free_non_null (referee->pkey);
1976 GNUNET_free (referee);
1980 * Free a DirectNeighbor node, including removing it
1981 * from the referer's list.
1984 direct_neighbor_free (struct DirectNeighbor *direct)
1986 struct NeighborSendContext *send_context;
1987 struct FastGossipNeighborList *about_list;
1988 struct FastGossipNeighborList *prev_about;
1990 send_context = direct->send_context;
1992 if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
1993 GNUNET_SCHEDULER_cancel(send_context->task);
1995 about_list = send_context->fast_gossip_list_head;
1996 while (about_list != NULL)
1998 GNUNET_CONTAINER_DLL_remove(send_context->fast_gossip_list_head, send_context->fast_gossip_list_tail, about_list);
1999 prev_about = about_list;
2000 about_list = about_list->next;
2001 GNUNET_free(prev_about);
2003 GNUNET_free(send_context);
2004 GNUNET_free(direct);
2008 * Multihashmap iterator for sending out disconnect messages
2011 * @param cls the peer that was disconnected
2012 * @param key key value stored under
2013 * @param value the direct neighbor to send disconnect to
2015 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2017 static int schedule_disconnect_messages (void *cls,
2018 const GNUNET_HashCode * key,
2021 struct DisconnectContext *disconnect_context = cls;
2022 struct DirectNeighbor *disconnected = disconnect_context->direct;
2023 struct DirectNeighbor *notify = value;
2024 struct PendingMessage *pending_message;
2025 p2p_dv_MESSAGE_Disconnect *disconnect_message;
2027 if (memcmp(¬ify->identity, &disconnected->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
2028 return GNUNET_YES; /* Don't send disconnect message to peer that disconnected! */
2030 pending_message = GNUNET_malloc(sizeof(struct PendingMessage) + sizeof(p2p_dv_MESSAGE_Disconnect));
2031 pending_message->msg = (struct GNUNET_MessageHeader *)&pending_message[1];
2032 pending_message->importance = default_dv_priority;
2033 pending_message->timeout = GNUNET_TIME_relative_get_forever();
2034 memcpy(&pending_message->recipient, ¬ify->identity, sizeof(struct GNUNET_PeerIdentity));
2035 pending_message->msg_size = sizeof(p2p_dv_MESSAGE_Disconnect);
2036 disconnect_message = (p2p_dv_MESSAGE_Disconnect *)pending_message->msg;
2037 disconnect_message->header.size = htons (sizeof (p2p_dv_MESSAGE_Disconnect));
2038 disconnect_message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DISCONNECT);
2039 disconnect_message->peer_id = htonl(disconnect_context->distant->our_id);
2041 GNUNET_CONTAINER_DLL_insert_after (core_pending_head,
2046 GNUNET_SCHEDULER_add_now(try_core_send, NULL);
2047 /*if (core_transmit_handle == NULL)
2048 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);*/
2054 * Multihashmap iterator for freeing extended neighbors.
2057 * @param key key value stored under
2058 * @param value the distant neighbor to be freed
2060 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2062 static int free_extended_neighbors (void *cls,
2063 const GNUNET_HashCode * key,
2066 struct DistantNeighbor *distant = value;
2067 distant_neighbor_free(distant);
2072 * Multihashmap iterator for freeing direct neighbors.
2075 * @param key key value stored under
2076 * @param value the direct neighbor to be freed
2078 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2080 static int free_direct_neighbors (void *cls,
2081 const GNUNET_HashCode * key,
2084 struct DirectNeighbor *direct = value;
2085 direct_neighbor_free(direct);
2091 * Task run during shutdown.
2097 shutdown_task (void *cls,
2098 const struct GNUNET_SCHEDULER_TaskContext *tc)
2101 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "calling CORE_DISCONNECT\n");
2102 GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &print_neighbors, NULL);
2104 GNUNET_CONTAINER_multihashmap_iterate(extended_neighbors, &free_extended_neighbors, NULL);
2105 GNUNET_CONTAINER_multihashmap_destroy(extended_neighbors);
2106 GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &free_direct_neighbors, NULL);
2107 GNUNET_CONTAINER_multihashmap_destroy(direct_neighbors);
2109 GNUNET_CONTAINER_heap_destroy(neighbor_max_heap);
2110 GNUNET_CONTAINER_heap_destroy(neighbor_min_heap);
2112 GNUNET_CORE_disconnect (coreAPI);
2113 GNUNET_PEERINFO_disconnect(peerinfo_handle);
2114 GNUNET_SERVER_mst_destroy(coreMST);
2115 GNUNET_free_non_null(my_short_id);
2117 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "CORE_DISCONNECT completed\n");
2122 * To be called on core init/fail.
2124 void core_init (void *cls,
2125 struct GNUNET_CORE_Handle * server,
2126 const struct GNUNET_PeerIdentity *identity,
2127 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded * publicKey)
2132 GNUNET_SCHEDULER_cancel(cleanup_task);
2133 GNUNET_SCHEDULER_add_now(&shutdown_task, NULL);
2137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2138 "%s: Core connection initialized, I am peer: %s\n", "dv", GNUNET_i2s(identity));
2140 memcpy(&my_identity, identity, sizeof(struct GNUNET_PeerIdentity));
2141 my_short_id = GNUNET_strdup(GNUNET_i2s(&my_identity));
2146 #if PKEY_NO_NEIGHBOR_ON_ADD
2148 * Iterator over hash map entries.
2150 * @param cls closure
2151 * @param key current key code
2152 * @param value value in the hash map
2153 * @return GNUNET_YES if we should continue to
2157 static int add_pkey_to_extended (void *cls,
2158 const GNUNET_HashCode * key,
2161 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey = cls;
2162 struct DistantNeighbor *distant_neighbor = abs_value;
2164 if (distant_neighbor->pkey == NULL)
2166 distant_neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2167 memcpy(distant_neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2175 * Iterator over hash map entries.
2177 * @param cls closure
2178 * @param key current key code
2179 * @param value value in the hash map
2180 * @return GNUNET_YES if we should continue to
2184 static int update_matching_neighbors (void *cls,
2185 const GNUNET_HashCode * key,
2188 struct NeighborUpdateInfo * update_info = cls;
2189 struct DistantNeighbor *distant_neighbor = value;
2191 if (update_info->referrer == distant_neighbor->referrer) /* Direct neighbor matches, update it's info and return GNUNET_NO */
2193 /* same referrer, cost change! */
2194 GNUNET_CONTAINER_heap_update_cost (neighbor_max_heap,
2195 update_info->neighbor->max_loc, update_info->cost);
2196 GNUNET_CONTAINER_heap_update_cost (neighbor_min_heap,
2197 update_info->neighbor->min_loc, update_info->cost);
2198 update_info->neighbor->last_activity = update_info->now;
2199 update_info->neighbor->cost = update_info->cost;
2200 update_info->neighbor->referrer_id = update_info->referrer_peer_id;
2209 * Iterate over all current direct peers, add DISTANT newly connected
2210 * peer to the fast gossip list for that peer so we get DV routing
2211 * information out as fast as possible!
2213 * @param cls the newly connected neighbor we will gossip about
2214 * @param key the hashcode of the peer
2215 * @param value the direct neighbor we should gossip to
2217 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2219 static int add_distant_all_direct_neighbors (void *cls,
2220 const GNUNET_HashCode * key,
2223 struct DirectNeighbor *direct = (struct DirectNeighbor *)value;
2224 struct DistantNeighbor *distant = (struct DistantNeighbor *)cls;
2225 struct NeighborSendContext *send_context = direct->send_context;
2226 struct FastGossipNeighborList *gossip_entry;
2232 if (distant == NULL)
2237 if (memcmp(&direct->identity, &distant->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
2239 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2243 if (distant->hidden == GNUNET_YES)
2244 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2246 gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
2247 gossip_entry->about = distant;
2249 GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
2250 send_context->fast_gossip_list_tail,
2251 send_context->fast_gossip_list_tail,
2254 encPeerAbout = GNUNET_strdup(GNUNET_i2s(&distant->identity));
2255 encPeerTo = GNUNET_strdup(GNUNET_i2s(&direct->identity));
2257 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Fast send info about peer %s id %u for directly connected peer %s\n",
2258 GNUNET_i2s(&my_identity),
2259 encPeerAbout, distant->our_id, encPeerTo);
2260 GNUNET_free(encPeerAbout);
2261 GNUNET_free(encPeerTo);
2263 /*if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
2264 GNUNET_SCHEDULER_cancel(send_context->task);*/
2266 send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, send_context);
2271 * Callback for hello address creation.
2273 * @param cls closure, a struct HelloContext
2274 * @param max maximum number of bytes that can be written to buf
2275 * @param buf where to write the address information
2277 * @return number of bytes written, 0 to signal the
2278 * end of the iteration.
2281 generate_hello_address (void *cls, size_t max, void *buf)
2283 struct HelloContext *hello_context = cls;
2289 if (hello_context->addresses_to_add == 0)
2292 /* Hello "address" will be concatenation of distant peer and direct peer identities */
2293 size = 2 * sizeof(struct GNUNET_PeerIdentity);
2294 GNUNET_assert(max >= size);
2296 addr_buffer = GNUNET_malloc(size);
2298 /* Copy the distant peer identity to buffer */
2299 memcpy(addr_buffer, &hello_context->distant_peer, sizeof(struct GNUNET_PeerIdentity));
2300 offset += sizeof(struct GNUNET_PeerIdentity);
2301 /* Copy the direct peer identity to buffer */
2302 memcpy(&addr_buffer[offset], hello_context->direct_peer, sizeof(struct GNUNET_PeerIdentity));
2303 ret = GNUNET_HELLO_add_address ("dv",
2304 GNUNET_TIME_relative_to_absolute
2305 (GNUNET_TIME_UNIT_HOURS), addr_buffer, size,
2308 hello_context->addresses_to_add--;
2310 GNUNET_free(addr_buffer);
2316 * Handles when a peer is either added due to being newly connected
2317 * or having been gossiped about, also called when the cost for a neighbor
2318 * needs to be updated.
2320 * @param peer identity of the peer whose info is being added/updated
2321 * @param pkey public key of the peer whose info is being added/updated
2322 * @param referrer_peer_id id to use when sending to 'peer'
2323 * @param referrer if this is a gossiped peer, who did we hear it from?
2324 * @param cost the cost of communicating with this peer via 'referrer'
2326 * @return the added neighbor, the updated neighbor or NULL (neighbor
2329 static struct DistantNeighbor *
2330 addUpdateNeighbor (const struct GNUNET_PeerIdentity * peer, struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey,
2331 unsigned int referrer_peer_id,
2332 struct DirectNeighbor *referrer, unsigned int cost)
2334 struct DistantNeighbor *neighbor;
2335 struct DistantNeighbor *max;
2336 struct GNUNET_TIME_Absolute now;
2337 struct NeighborUpdateInfo *neighbor_update;
2338 struct HelloContext *hello_context;
2339 struct GNUNET_HELLO_Message *hello_msg;
2340 unsigned int our_id;
2345 #if DEBUG_DV_PEER_NUMBERS
2347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2348 "%s Received sender id (%u)!\n", "DV SERVICE", referrer_peer_id);
2351 now = GNUNET_TIME_absolute_get ();
2352 neighbor = GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
2354 neighbor_update = GNUNET_malloc(sizeof(struct NeighborUpdateInfo));
2355 neighbor_update->neighbor = neighbor;
2356 neighbor_update->cost = cost;
2357 neighbor_update->now = now;
2358 neighbor_update->referrer = referrer;
2359 neighbor_update->referrer_peer_id = referrer_peer_id;
2361 if (neighbor != NULL)
2364 memcpy(&our_id, &neighbor->identity, sizeof(unsigned int));
2366 our_id = neighbor->our_id;
2372 memcpy(&our_id, peer, sizeof(unsigned int));
2374 our_id = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG, RAND_MAX - 1) + 1;
2378 /* Either we do not know this peer, or we already do but via a different immediate peer */
2379 if ((neighbor == NULL) ||
2380 (GNUNET_CONTAINER_multihashmap_get_multiple(extended_neighbors,
2382 &update_matching_neighbors,
2383 neighbor_update) != GNUNET_SYSERR))
2387 if ((neighbor != NULL) && (cost < neighbor->cost)) /* New cost is less than old, remove old */
2389 distant_neighbor_free(neighbor);
2391 else if (neighbor != NULL) /* Only allow one DV connection to each peer */
2397 if (cost > fisheye_depth)
2400 GNUNET_free(neighbor_update);
2404 #if DEBUG_DV_PEER_NUMBERS
2405 encAbout = GNUNET_strdup(GNUNET_i2s(peer));
2406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2407 "%s: %s Chose NEW id (%u) for peer %s!\n", GNUNET_i2s(&my_identity), "DV SERVICE", our_id, encAbout);
2408 GNUNET_free(encAbout);
2411 if (max_table_size <=
2412 GNUNET_CONTAINER_multihashmap_size (extended_neighbors))
2414 /* remove most expensive entry */
2415 max = GNUNET_CONTAINER_heap_peek (neighbor_max_heap);
2416 GNUNET_assert(max != NULL);
2417 if (cost > max->cost)
2419 /* new entry most expensive, don't create */
2420 GNUNET_free(neighbor_update);
2425 /* only free if this is not a direct connection;
2426 we could theoretically have more direct
2427 connections than DV entries allowed total! */
2428 distant_neighbor_free (max);
2432 neighbor = GNUNET_malloc (sizeof (struct DistantNeighbor));
2433 GNUNET_CONTAINER_DLL_insert (referrer->referee_head,
2434 referrer->referee_tail, neighbor);
2435 neighbor->max_loc = GNUNET_CONTAINER_heap_insert (neighbor_max_heap,
2437 neighbor->min_loc = GNUNET_CONTAINER_heap_insert (neighbor_min_heap,
2439 neighbor->referrer = referrer;
2440 memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
2441 if (pkey != NULL) /* pkey will be null on direct neighbor addition */
2443 neighbor->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2444 memcpy (neighbor->pkey, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2447 neighbor->pkey = pkey;
2449 neighbor->last_activity = now;
2450 neighbor->cost = cost;
2451 neighbor->referrer_id = referrer_peer_id;
2452 neighbor->our_id = our_id;
2454 (cost == DIRECT_NEIGHBOR_COST) ? (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 4) ==
2457 GNUNET_CONTAINER_multihashmap_put (extended_neighbors, &peer->hashPubKey,
2459 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2460 if (referrer_peer_id != 0)
2462 for (i = 0; i< MAX_OUTSTANDING_MESSAGES; i++)
2464 if (referrer->pending_messages[i].sender_id == referrer_peer_id) /* We have a queued message from just learned about peer! */
2466 #if DEBUG_DV_MESSAGES
2467 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);
2469 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);
2470 GNUNET_free(referrer->pending_messages[i].message);
2471 referrer->pending_messages[i].sender_id = 0;
2475 if ((cost != DIRECT_NEIGHBOR_COST) && (neighbor->pkey != NULL))
2477 /* Added neighbor, now send HELLO to transport */
2478 hello_context = GNUNET_malloc(sizeof(struct HelloContext));
2479 hello_context->direct_peer = &referrer->identity;
2480 memcpy(&hello_context->distant_peer, peer, sizeof(struct GNUNET_PeerIdentity));
2481 hello_context->addresses_to_add = 1;
2482 hello_msg = GNUNET_HELLO_create(pkey, &generate_hello_address, hello_context);
2483 GNUNET_assert(memcmp(hello_context->direct_peer, &hello_context->distant_peer, sizeof(struct GNUNET_PeerIdentity)) != 0);
2484 addr1 = GNUNET_strdup(GNUNET_i2s(hello_context->direct_peer));
2485 addr2 = GNUNET_strdup(GNUNET_i2s(&hello_context->distant_peer));
2487 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);
2491 send_to_plugin(hello_context->direct_peer, GNUNET_HELLO_get_header(hello_msg), GNUNET_HELLO_size(hello_msg), &hello_context->distant_peer, cost);
2492 GNUNET_free(hello_context);
2493 GNUNET_free(hello_msg);
2500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2501 "%s: Already know peer %s distance %d, referrer id %d!\n", "dv", GNUNET_i2s(peer), cost, referrer_peer_id);
2505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2506 "%s: Size of extended_neighbors is %d\n", "dv", GNUNET_CONTAINER_multihashmap_size(extended_neighbors));
2509 GNUNET_free(neighbor_update);
2515 * Core handler for dv disconnect messages. These will be used
2516 * by us to tell transport via the dv plugin that a peer can
2517 * no longer be contacted by us via a certain address. We should
2518 * then propagate these messages on, given that the distance to
2519 * the peer indicates we would have gossiped about it to others.
2521 * @param cls closure
2522 * @param peer peer which sent the message (immediate sender)
2523 * @param message the message
2524 * @param latency the latency of the connection we received the message from
2525 * @param distance the distance to the immediate peer
2527 static int handle_dv_disconnect_message (void *cls,
2528 const struct GNUNET_PeerIdentity *peer,
2529 const struct GNUNET_MessageHeader *message,
2530 struct GNUNET_TIME_Relative latency,
2533 struct DirectNeighbor *referrer;
2534 struct DistantNeighbor *distant;
2535 p2p_dv_MESSAGE_Disconnect *enc_message = (p2p_dv_MESSAGE_Disconnect *)message;
2537 if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_Disconnect))
2539 return GNUNET_SYSERR; /* invalid message */
2542 referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
2544 if (referrer == NULL)
2547 distant = referrer->referee_head;
2548 while (distant != NULL)
2550 if (distant->referrer_id == ntohl(enc_message->peer_id))
2552 distant_neighbor_free(distant);
2553 distant = referrer->referee_head;
2556 distant = distant->next;
2564 * Core handler for dv gossip messages. These will be used
2565 * by us to create a HELLO message for the newly peer containing
2566 * which direct peer we can connect through, and what the cost
2567 * is. This HELLO will then be scheduled for validation by the
2568 * transport service so that it can be used by all others.
2570 * @param cls closure
2571 * @param peer peer which sent the message (immediate sender)
2572 * @param message the message
2573 * @param latency the latency of the connection we received the message from
2574 * @param distance the distance to the immediate peer
2576 static int handle_dv_gossip_message (void *cls,
2577 const struct GNUNET_PeerIdentity *peer,
2578 const struct GNUNET_MessageHeader *message,
2579 struct GNUNET_TIME_Relative latency,
2582 struct DirectNeighbor *referrer;
2583 p2p_dv_MESSAGE_NeighborInfo *enc_message = (p2p_dv_MESSAGE_NeighborInfo *)message;
2585 if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_NeighborInfo))
2587 return GNUNET_SYSERR; /* invalid message */
2590 #if DEBUG_DV_GOSSIP_RECEIPT
2591 char * encPeerAbout;
2594 encPeerAbout = GNUNET_strdup(GNUNET_i2s(&enc_message->neighbor));
2595 encPeerFrom = GNUNET_strdup(GNUNET_i2s(peer));
2596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2597 "%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);
2598 GNUNET_free(encPeerAbout);
2599 GNUNET_free(encPeerFrom);
2602 referrer = GNUNET_CONTAINER_multihashmap_get (direct_neighbors,
2604 if (referrer == NULL)
2607 addUpdateNeighbor (&enc_message->neighbor, &enc_message->pkey,
2608 ntohl (enc_message->neighbor_id),
2609 referrer, ntohl (enc_message->cost) + 1);
2616 * Iterate over all currently known peers, add them to the
2617 * fast gossip list for this peer so we get DV routing information
2618 * out as fast as possible!
2620 * @param cls the direct neighbor we will gossip to
2621 * @param key the hashcode of the peer
2622 * @param value the distant neighbor we should add to the list
2624 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2626 static int add_all_extended_peers (void *cls,
2627 const GNUNET_HashCode * key,
2630 struct NeighborSendContext *send_context = (struct NeighborSendContext *)cls;
2631 struct DistantNeighbor *distant = (struct DistantNeighbor *)value;
2632 struct FastGossipNeighborList *gossip_entry;
2634 if (memcmp(&send_context->toNeighbor->identity, &distant->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
2635 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2638 if (distant->hidden == GNUNET_YES)
2639 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2641 gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
2642 gossip_entry->about = distant;
2644 GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
2645 send_context->fast_gossip_list_tail,
2646 send_context->fast_gossip_list_tail,
2654 * Iterator over hash map entries.
2656 * @param cls closure
2657 * @param key current key code
2658 * @param value value in the hash map
2659 * @return GNUNET_YES if we should continue to
2663 static int gossip_all_to_all_iterator (void *cls,
2664 const GNUNET_HashCode * key,
2667 struct DirectNeighbor *direct = abs_value;
2669 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, direct->send_context);
2671 if (direct->send_context->task != GNUNET_SCHEDULER_NO_TASK)
2672 GNUNET_SCHEDULER_cancel(direct->send_context->task);
2674 direct->send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, direct->send_context);
2679 * Task run during shutdown.
2685 gossip_all_to_all (void *cls,
2686 const struct GNUNET_SCHEDULER_TaskContext *tc)
2688 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &gossip_all_to_all_iterator, NULL);
2690 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5),
2697 * Iterate over all current direct peers, add newly connected peer
2698 * to the fast gossip list for that peer so we get DV routing
2699 * information out as fast as possible!
2701 * @param cls the newly connected neighbor we will gossip about
2702 * @param key the hashcode of the peer
2703 * @param value the direct neighbor we should gossip to
2705 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2707 static int add_all_direct_neighbors (void *cls,
2708 const GNUNET_HashCode * key,
2711 struct DirectNeighbor *direct = (struct DirectNeighbor *)value;
2712 struct DirectNeighbor *to = (struct DirectNeighbor *)cls;
2713 struct DistantNeighbor *distant;
2714 struct NeighborSendContext *send_context = direct->send_context;
2715 struct FastGossipNeighborList *gossip_entry;
2719 distant = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &to->identity.hashPubKey);
2720 if (distant == NULL)
2725 if (memcmp(&direct->identity, &to->identity, sizeof(struct GNUNET_PeerIdentity)) == 0)
2727 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2731 if (distant->hidden == GNUNET_YES)
2732 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2734 direct_id = GNUNET_strdup(GNUNET_i2s(&direct->identity));
2736 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);
2738 GNUNET_free(direct_id);
2739 gossip_entry = GNUNET_malloc(sizeof(struct FastGossipNeighborList));
2740 gossip_entry->about = distant;
2742 GNUNET_CONTAINER_DLL_insert_after(send_context->fast_gossip_list_head,
2743 send_context->fast_gossip_list_tail,
2744 send_context->fast_gossip_list_tail,
2746 if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
2747 GNUNET_SCHEDULER_cancel(send_context->task);
2749 send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, send_context);
2750 //tc.reason = GNUNET_SCHEDULER_REASON_TIMEOUT;
2751 //neighbor_send_task(send_context, &tc);
2756 * Type of an iterator over the hosts. Note that each
2757 * host will be called with each available protocol.
2759 * @param cls closure
2760 * @param peer id of the peer, NULL for last call
2761 * @param hello hello message for the peer (can be NULL)
2764 process_peerinfo (void *cls,
2765 const struct GNUNET_PeerIdentity *peer,
2766 const struct GNUNET_HELLO_Message *hello)
2768 struct PeerIteratorContext *peerinfo_iterator = cls;
2769 struct DirectNeighbor *neighbor = peerinfo_iterator->neighbor;
2770 struct DistantNeighbor *distant = peerinfo_iterator->distant;
2771 #if DEBUG_DV_PEER_NUMBERS
2778 if (distant->pkey == NULL)
2781 GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Failed to get peerinfo information for this peer, retrying!\n");
2783 peerinfo_iterator->ic = GNUNET_PEERINFO_iterate(peerinfo_handle,
2784 &peerinfo_iterator->neighbor->identity,
2785 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3),
2791 GNUNET_free(peerinfo_iterator);
2796 if (memcmp(&neighbor->identity, peer, sizeof(struct GNUNET_PeerIdentity) != 0))
2799 if ((hello != NULL) && (GNUNET_HELLO_get_key (hello, &neighbor->pkey) == GNUNET_OK))
2801 if (distant->pkey == NULL)
2803 distant->pkey = GNUNET_malloc(sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2804 memcpy(distant->pkey, &neighbor->pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2807 sent = GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &add_all_extended_peers, neighbor->send_context);
2810 GNUNET_STATISTICS_update (stats, "# distant peers gossiped to direct neighbors", sent, GNUNET_NO);
2812 #if DEBUG_DV_PEER_NUMBERS
2813 neighbor_pid = GNUNET_strdup(GNUNET_i2s(&neighbor->identity));
2814 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped %d extended peers to %s\n", GNUNET_i2s(&my_identity), sent, neighbor_pid);
2816 sent = GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &add_all_direct_neighbors, neighbor);
2819 GNUNET_STATISTICS_update (stats, "# direct peers gossiped to direct neighbors", sent, GNUNET_NO);
2821 #if DEBUG_DV_PEER_NUMBERS
2822 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "%s: Gossipped about %s to %d direct peers\n", GNUNET_i2s(&my_identity), neighbor_pid, sent);
2823 GNUNET_free(neighbor_pid);
2825 neighbor->send_context->task = GNUNET_SCHEDULER_add_now(&neighbor_send_task, neighbor->send_context);
2831 * Method called whenever a peer connects.
2833 * @param cls closure
2834 * @param peer peer identity this notification is about
2835 * @param latency reported latency of the connection with peer
2836 * @param distance reported distance (DV) to peer
2838 void handle_core_connect (void *cls,
2839 const struct GNUNET_PeerIdentity * peer,
2840 struct GNUNET_TIME_Relative latency,
2843 struct DirectNeighbor *neighbor;
2844 struct DistantNeighbor *about;
2845 struct PeerIteratorContext *peerinfo_iterator;
2848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2849 "%s: Receives core connect message for peer %s distance %d!\n", "dv", GNUNET_i2s(peer), distance);
2852 if ((distance == DIRECT_NEIGHBOR_COST) && (GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL))
2854 peerinfo_iterator = GNUNET_malloc(sizeof(struct PeerIteratorContext));
2855 neighbor = GNUNET_malloc (sizeof (struct DirectNeighbor));
2856 neighbor->send_context = GNUNET_malloc(sizeof(struct NeighborSendContext));
2857 neighbor->send_context->toNeighbor = neighbor;
2858 memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
2860 GNUNET_assert(GNUNET_SYSERR != GNUNET_CONTAINER_multihashmap_put (direct_neighbors,
2862 neighbor, GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
2863 about = addUpdateNeighbor (peer, NULL, 0, neighbor, DIRECT_NEIGHBOR_COST);
2864 peerinfo_iterator->distant = about;
2865 peerinfo_iterator->neighbor = neighbor;
2866 peerinfo_iterator->ic = GNUNET_PEERINFO_iterate (peerinfo_handle,
2868 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 3),
2872 if ((about != NULL) && (about->pkey == NULL))
2875 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Newly added peer %s has NULL pkey!\n", GNUNET_i2s(peer));
2878 else if (about != NULL)
2880 GNUNET_free(peerinfo_iterator);
2885 about = GNUNET_CONTAINER_multihashmap_get(extended_neighbors, &peer->hashPubKey);
2886 if ((GNUNET_CONTAINER_multihashmap_get(direct_neighbors, &peer->hashPubKey) == NULL) && (about != NULL))
2888 sent = GNUNET_CONTAINER_multihashmap_iterate(direct_neighbors, &add_distant_all_direct_neighbors, about);
2891 GNUNET_STATISTICS_update (stats, "# direct peers gossiped to new direct neighbors", sent, GNUNET_NO);
2895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2896 "%s: Distance (%d) greater than %d or already know about peer (%s), not re-adding!\n", "dv", distance, DIRECT_NEIGHBOR_COST, GNUNET_i2s(peer));
2903 * Method called whenever a given peer disconnects.
2905 * @param cls closure
2906 * @param peer peer identity this notification is about
2908 void handle_core_disconnect (void *cls,
2909 const struct GNUNET_PeerIdentity * peer)
2911 struct DirectNeighbor *neighbor;
2912 struct DistantNeighbor *referee;
2913 struct FindDestinationContext fdc;
2914 struct DisconnectContext disconnect_context;
2917 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2918 "%s: Receives core peer disconnect message!\n", "dv");
2922 GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
2923 if (neighbor == NULL)
2927 while (NULL != (referee = neighbor->referee_head))
2928 distant_neighbor_free (referee);
2933 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &find_distant_peer, &fdc);
2935 if (fdc.dest != NULL)
2937 disconnect_context.direct = neighbor;
2938 disconnect_context.distant = fdc.dest;
2939 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors, &schedule_disconnect_messages, &disconnect_context);
2942 GNUNET_assert (neighbor->referee_tail == NULL);
2943 if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_remove (direct_neighbors,
2944 &peer->hashPubKey, neighbor))
2948 if ((neighbor->send_context != NULL) && (neighbor->send_context->task != GNUNET_SCHEDULER_NO_TASK))
2949 GNUNET_SCHEDULER_cancel(neighbor->send_context->task);
2950 GNUNET_free (neighbor);
2955 * Process dv requests.
2957 * @param cls closure
2958 * @param server the initialized server
2959 * @param c configuration to use
2963 struct GNUNET_SERVER_Handle *server,
2964 const struct GNUNET_CONFIGURATION_Handle *c)
2966 unsigned long long max_hosts;
2969 /* FIXME: Read from config, or calculate, or something other than this! */
2970 max_hosts = DEFAULT_DIRECT_CONNECTIONS;
2971 max_table_size = DEFAULT_DV_SIZE;
2972 fisheye_depth = DEFAULT_FISHEYE_DEPTH;
2974 if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_direct_connections"))
2975 GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_direct_connections", &max_hosts));
2977 if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "max_total_connections"))
2978 GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "max_total_connections", &max_table_size));
2981 if (GNUNET_CONFIGURATION_have_value(cfg, "dv", "fisheye_depth"))
2982 GNUNET_assert(GNUNET_OK == GNUNET_CONFIGURATION_get_value_number(cfg, "dv", "fisheye_depth", &fisheye_depth));
2985 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
2987 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MAX);
2989 direct_neighbors = GNUNET_CONTAINER_multihashmap_create (max_hosts);
2990 extended_neighbors =
2991 GNUNET_CONTAINER_multihashmap_create (max_table_size * 3);
2993 GNUNET_SERVER_add_handlers (server, plugin_handlers);
2995 GNUNET_CORE_connect (cfg,
2997 GNUNET_TIME_relative_get_forever(),
2998 NULL, /* FIXME: anything we want to pass around? */
3000 &handle_core_connect,
3001 &handle_core_disconnect,
3009 if (coreAPI == NULL)
3012 coreMST = GNUNET_SERVER_mst_create (&tokenized_message_handler,
3015 peerinfo_handle = GNUNET_PEERINFO_connect(cfg);
3017 if (peerinfo_handle == NULL)
3019 GNUNET_CORE_disconnect(coreAPI);
3023 /* Scheduled the task to clean up when shutdown is called */
3024 cleanup_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
3031 * The main function for the dv service.
3033 * @param argc number of arguments from the command line
3034 * @param argv command line arguments
3035 * @return 0 ok, 1 on error
3038 main (int argc, char *const *argv)
3040 return (GNUNET_OK ==
3041 GNUNET_SERVICE_run (argc,
3044 GNUNET_SERVICE_OPTION_NONE,
3045 &run, NULL)) ? 0 : 1;