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,
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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
32 #include "gnunet_client_lib.h"
33 #include "gnunet_getopt_lib.h"
34 #include "gnunet_os_lib.h"
35 #include "gnunet_protocols.h"
36 #include "gnunet_service_lib.h"
37 #include "gnunet_core_service.h"
38 #include "gnunet_signal_lib.h"
39 #include "gnunet_util_lib.h"
40 #include "gnunet_hello_lib.h"
41 #include "gnunet_peerinfo_service.h"
42 #include "gnunet_crypto_lib.h"
43 #include "gnunet_statistics_service.h"
47 * For testing mostly, remember only the
48 * shortest path to a distant neighbor.
50 #define AT_MOST_ONE GNUNET_NO
52 #define USE_PEER_ID GNUNET_YES
55 * How many outstanding messages (unknown sender) will we allow per peer?
57 #define MAX_OUTSTANDING_MESSAGES 5
60 * How often do we check about sending out more peer information (if
61 * we are connected to no peers previously).
63 #define GNUNET_DV_DEFAULT_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
66 * How long do we wait at most between sending out information?
68 #define GNUNET_DV_MAX_SEND_INTERVAL GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_MILLISECONDS, 500000)
71 * How long can we have not heard from a peer and
72 * still have it in our tables?
74 #define GNUNET_DV_PEER_EXPIRATION_TIME GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 1000))
77 * Priority for gossip.
79 #define GNUNET_DV_DHT_GOSSIP_PRIORITY (GNUNET_EXTREME_PRIORITY / 10)
82 * How often should we check if expiration time has elapsed for
85 #define GNUNET_DV_MAINTAIN_FREQUENCY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
88 * How long to allow a message to be delayed?
90 #define DV_DELAY GNUNET_TIME_relative_multiply(GNUNET_TIME_UNIT_SECONDS, 5))
93 * Priority to use for DV data messages.
98 * The cost to a direct neighbor. We used to use 0, but 1 makes more sense.
100 #define DIRECT_NEIGHBOR_COST 1
103 * The default number of direct connections to store in DV (max)
105 #define DEFAULT_DIRECT_CONNECTIONS 50
108 * The default size of direct + extended peers in DV (max)
110 #define DEFAULT_DV_SIZE 100
113 * The default fisheye depth, from how many hops away will
116 #define DEFAULT_FISHEYE_DEPTH 4
119 * Linked list of messages to send to clients.
121 struct PendingMessage
124 * Pointer to next item in the list
126 struct PendingMessage *next;
129 * Pointer to previous item in the list
131 struct PendingMessage *prev;
134 * The PeerIdentity to send to
136 struct GNUNET_PeerIdentity recipient;
139 * The result of message sending.
141 struct GNUNET_DV_SendResultMessage *send_result;
144 * Message importance level.
146 unsigned int importance;
151 unsigned int msg_size;
154 * How long to wait before sending message.
156 struct GNUNET_TIME_Relative timeout;
159 * Actual message to be sent; // avoid allocation
161 const struct GNUNET_MessageHeader *msg; // msg = (cast) &pm[1]; // memcpy (&pm[1], data, len);
165 struct FastGossipNeighborList
168 * Next element of DLL
170 struct FastGossipNeighborList *next;
173 * Prev element of DLL
175 struct FastGossipNeighborList *prev;
178 * The neighbor to gossip about
180 struct DistantNeighbor *about;
184 * Context created whenever a direct peer connects to us,
185 * used to gossip other peers to it.
187 struct NeighborSendContext
190 * The peer we will gossip to.
192 struct DirectNeighbor *toNeighbor;
195 * The task associated with this context.
197 GNUNET_SCHEDULER_TaskIdentifier task;
200 * Head of DLL of peers to gossip about
201 * as fast as possible to this peer, for initial
204 struct FastGossipNeighborList *fast_gossip_list_head;
207 * Tail of DLL of peers to gossip about
208 * as fast as possible to this peer, for initial
211 struct FastGossipNeighborList *fast_gossip_list_tail;
217 * Struct to hold information for updating existing neighbors
219 struct NeighborUpdateInfo
227 * The existing neighbor
229 struct DistantNeighbor *neighbor;
232 * The referrer of the possibly existing peer
234 struct DirectNeighbor *referrer;
237 * The time we heard about this peer
239 struct GNUNET_TIME_Absolute now;
242 * Peer id this peer uses to refer to neighbor.
244 unsigned int referrer_peer_id;
249 * Struct to store a single message received with
252 struct UnknownSenderMessage
255 * Message sender (immediate)
257 struct GNUNET_PeerIdentity sender;
260 * The actual message received
262 struct GNUNET_MessageHeader *message;
265 * Latency of connection
267 struct GNUNET_TIME_Relative latency;
270 * Distance to destination
281 * Struct where actual neighbor information is stored,
282 * referenced by min_heap and max_heap. Freeing dealt
283 * with when items removed from hashmap.
285 struct DirectNeighbor
288 * Identity of neighbor.
290 struct GNUNET_PeerIdentity identity;
293 * PublicKey of neighbor.
295 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
298 * Head of DLL of nodes that this direct neighbor referred to us.
300 struct DistantNeighbor *referee_head;
303 * Tail of DLL of nodes that this direct neighbor referred to us.
305 struct DistantNeighbor *referee_tail;
308 * The sending context for gossiping peers to this neighbor.
310 struct NeighborSendContext *send_context;
313 * Is this one of the direct neighbors that we are "hiding"
319 * Save messages immediately from this direct neighbor from a
320 * distan peer we don't know on the chance that it will be
321 * gossiped about and we can deliver the message.
323 struct UnknownSenderMessage pending_messages[MAX_OUTSTANDING_MESSAGES];
328 * Struct where actual neighbor information is stored,
329 * referenced by min_heap and max_heap. Freeing dealt
330 * with when items removed from hashmap.
332 struct DistantNeighbor
335 * We keep distant neighbor's of the same referrer in a DLL.
337 struct DistantNeighbor *next;
340 * We keep distant neighbor's of the same referrer in a DLL.
342 struct DistantNeighbor *prev;
347 struct GNUNET_CONTAINER_HeapNode *min_loc;
352 struct GNUNET_CONTAINER_HeapNode *max_loc;
355 * Identity of referrer (next hop towards 'neighbor').
357 struct DirectNeighbor *referrer;
360 * Identity of neighbor.
362 struct GNUNET_PeerIdentity identity;
365 * PublicKey of neighbor.
367 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey;
370 * Last time we received routing information from this peer
372 struct GNUNET_TIME_Absolute last_activity;
375 * Last time we sent routing information about this peer
377 struct GNUNET_TIME_Absolute last_gossip;
380 * Cost to neighbor, used for actual distance vector computations
385 * Random identifier *we* use for this peer, to be used as shortcut
386 * instead of sending full peer id for each message
391 * Random identifier the *referrer* uses for this peer.
393 unsigned int referrer_id;
396 * Is this one of the direct neighbors that we are "hiding"
403 struct PeerIteratorContext
406 * The actual context, to be freed later.
408 struct GNUNET_PEERINFO_IteratorContext *ic;
411 * The neighbor about which we are concerned.
413 struct DirectNeighbor *neighbor;
416 * The distant neighbor entry for this direct neighbor.
418 struct DistantNeighbor *distant;
423 * Context used for creating hello messages when
424 * gossips are received.
429 * Identity of distant neighbor.
431 struct GNUNET_PeerIdentity distant_peer;
434 * Identity of direct neighbor, via which we send this message.
436 const struct GNUNET_PeerIdentity *direct_peer;
439 * How many addresses do we need to add (always starts at 1, then set to 0)
441 int addresses_to_add;
445 struct DV_SendContext
448 * The distant peer (should always match)
450 struct GNUNET_PeerIdentity *distant_peer;
453 * The direct peer, we need to verify the referrer of.
455 struct GNUNET_PeerIdentity *direct_peer;
458 * The message to be sent
460 struct GNUNET_MessageHeader *message;
463 * The pre-built send result message. Simply needs to be queued
464 * and freed once send has been called!
466 struct GNUNET_DV_SendResultMessage *send_result;
469 * The size of the message being sent, may be larger
470 * than message->header.size because it's multiple
471 * messages packed into one!
476 * How important is this message?
478 unsigned int importance;
481 * Timeout for this message
483 struct GNUNET_TIME_Relative timeout;
486 * Unique ID for DV message
491 struct FindDestinationContext
494 struct DistantNeighbor *dest;
500 struct GNUNET_PeerIdentity *dest;
501 const struct GNUNET_PeerIdentity *via;
504 struct DisconnectContext
507 * Distant neighbor to get pid from.
509 struct DistantNeighbor *distant;
512 * Direct neighbor that disconnected.
514 struct DirectNeighbor *direct;
517 struct TokenizedMessageContext
520 * Immediate sender of this message
522 const struct GNUNET_PeerIdentity *peer;
525 * Distant sender of the message
527 struct DistantNeighbor *distant;
530 * Uid for this set of messages
536 * Context for finding the least cost peer to send to.
537 * Transport selection can only go so far.
539 struct FindLeastCostContext
541 struct DistantNeighbor *target;
542 unsigned int least_cost;
546 * Handle to the core service api.
548 static struct GNUNET_CORE_Handle *coreAPI;
551 * Stream tokenizer to handle messages coming in from core.
553 static struct GNUNET_SERVER_MessageStreamTokenizer *coreMST;
556 * The identity of our peer.
558 static struct GNUNET_PeerIdentity my_identity;
561 * The configuration for this service.
563 static const struct GNUNET_CONFIGURATION_Handle *cfg;
567 * The client, the DV plugin connected to us. Hopefully
568 * this client will never change, although if the plugin dies
569 * and returns for some reason it may happen.
571 static struct GNUNET_SERVER_Client *client_handle;
574 * Task to run when we shut down, cleaning up all our trash
576 static GNUNET_SCHEDULER_TaskIdentifier cleanup_task;
578 static size_t default_dv_priority = 0;
580 static char *my_short_id;
583 * Transmit handle to the plugin.
585 static struct GNUNET_CONNECTION_TransmitHandle *plugin_transmit_handle;
588 * Head of DLL for client messages
590 static struct PendingMessage *plugin_pending_head;
593 * Tail of DLL for client messages
595 static struct PendingMessage *plugin_pending_tail;
598 * Handle to the peerinfo service
600 static struct GNUNET_PEERINFO_Handle *peerinfo_handle;
603 * Transmit handle to core service.
605 static struct GNUNET_CORE_TransmitHandle *core_transmit_handle;
608 * Head of DLL for core messages
610 static struct PendingMessage *core_pending_head;
613 * Tail of DLL for core messages
615 static struct PendingMessage *core_pending_tail;
618 * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for all
619 * directly connected peers.
621 static struct GNUNET_CONTAINER_MultiHashMap *direct_neighbors;
624 * Map of PeerIdentifiers to 'struct GNUNET_dv_neighbor*'s for
625 * peers connected via DV (extended neighborhood). Does ALSO
626 * include any peers that are in 'direct_neighbors'; for those
627 * peers, the cost will be zero and the referrer all zeros.
629 static struct GNUNET_CONTAINER_MultiHashMap *extended_neighbors;
632 * We use the min heap (min refers to cost) to prefer
633 * gossipping about peers with small costs.
635 static struct GNUNET_CONTAINER_Heap *neighbor_min_heap;
638 * We use the max heap (max refers to cost) for general
639 * iterations over all peers and to remove the most costly
640 * connection if we have too many.
642 static struct GNUNET_CONTAINER_Heap *neighbor_max_heap;
645 * Handle for the statistics service.
647 struct GNUNET_STATISTICS_Handle *stats;
650 * How far out to keep peers we learn about.
652 static unsigned long long fisheye_depth;
655 * How many peers to store at most.
657 static unsigned long long max_table_size;
660 * We've been given a target ID based on the random numbers that
661 * we assigned to our DV-neighborhood. Find the entry for the
662 * respective neighbor.
665 find_destination (void *cls, struct GNUNET_CONTAINER_HeapNode *node,
666 void *element, GNUNET_CONTAINER_HeapCostType cost)
668 struct FindDestinationContext *fdc = cls;
669 struct DistantNeighbor *dn = element;
671 if (fdc->tid != dn->our_id)
679 * We've been given a target ID based on the random numbers that
680 * we assigned to our DV-neighborhood. Find the entry for the
681 * respective neighbor.
684 find_specific_id (void *cls, const GNUNET_HashCode * key, void *value)
686 struct FindIDContext *fdc = cls;
687 struct DistantNeighbor *dn = value;
690 (&dn->referrer->identity, fdc->via,
691 sizeof (struct GNUNET_PeerIdentity)) == 0)
693 fdc->tid = dn->referrer_id;
700 * Find a distant peer whose referrer_id matches what we're
701 * looking for. For looking up a peer we've gossipped about
702 * but is now disconnected. Need to do this because we don't
703 * want to remove those that may be accessible via a different
707 find_distant_peer (void *cls, const GNUNET_HashCode * key, void *value)
709 struct FindDestinationContext *fdc = cls;
710 struct DistantNeighbor *distant = value;
712 if (fdc->tid == distant->referrer_id)
721 * Function called to notify a client about the socket
722 * begin ready to queue more data. "buf" will be
723 * NULL and "size" zero if the socket was closed for
724 * writing in the meantime.
727 * @param size number of bytes available in buf
728 * @param buf where the callee should write the message
729 * @return number of bytes written to buf
732 transmit_to_plugin (void *cls, size_t size, void *buf)
735 struct PendingMessage *reply;
741 /* client disconnected */
742 #if DEBUG_DV_MESSAGES
743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
744 "%s: %s buffer was NULL (client disconnect?)\n", my_short_id,
745 "transmit_to_plugin");
749 plugin_transmit_handle = NULL;
751 while ((NULL != (reply = plugin_pending_head)) &&
752 (size >= off + (msize = ntohs (reply->msg->size))))
754 GNUNET_CONTAINER_DLL_remove (plugin_pending_head, plugin_pending_tail,
756 memcpy (&cbuf[off], reply->msg, msize);
761 if (plugin_pending_head != NULL)
762 plugin_transmit_handle =
763 GNUNET_SERVER_notify_transmit_ready (client_handle,
764 ntohs (plugin_pending_head->
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
783 send_to_plugin (const struct GNUNET_PeerIdentity *sender,
784 const struct GNUNET_MessageHeader *message, size_t message_size,
785 struct GNUNET_PeerIdentity *distant_neighbor, size_t cost)
787 struct GNUNET_DV_MessageReceived *received_msg;
788 struct PendingMessage *pending_message;
789 char *sender_address;
790 size_t sender_address_len;
791 char *packed_msg_start;
795 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
796 "send_to_plugin called with peer %s as sender\n",
797 GNUNET_i2s (distant_neighbor));
800 if (memcmp (sender, distant_neighbor, sizeof (struct GNUNET_PeerIdentity)) !=
803 sender_address_len = sizeof (struct GNUNET_PeerIdentity) * 2;
804 sender_address = GNUNET_malloc (sender_address_len);
805 memcpy (sender_address, distant_neighbor,
806 sizeof (struct GNUNET_PeerIdentity));
807 memcpy (&sender_address[sizeof (struct GNUNET_PeerIdentity)], sender,
808 sizeof (struct GNUNET_PeerIdentity));
812 sender_address_len = sizeof (struct GNUNET_PeerIdentity);
813 sender_address = GNUNET_malloc (sender_address_len);
814 memcpy (sender_address, sender, sizeof (struct GNUNET_PeerIdentity));
818 sizeof (struct GNUNET_DV_MessageReceived) + sender_address_len +
820 received_msg = GNUNET_malloc (size);
821 received_msg->header.size = htons (size);
822 received_msg->header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DV_RECEIVE);
823 received_msg->distance = htonl (cost);
824 received_msg->msg_len = htonl (message_size);
825 /* Set the sender in this message to be the original sender! */
826 memcpy (&received_msg->sender, distant_neighbor,
827 sizeof (struct GNUNET_PeerIdentity));
828 /* Copy the intermediate sender to the end of the message, this is how the transport identifies this peer */
829 memcpy (&received_msg[1], sender_address, sender_address_len);
830 GNUNET_free (sender_address);
831 /* Copy the actual message after the sender */
832 packed_msg_start = (char *) &received_msg[1];
833 packed_msg_start = &packed_msg_start[sender_address_len];
834 memcpy (packed_msg_start, message, message_size);
835 pending_message = GNUNET_malloc (sizeof (struct PendingMessage) + size);
836 pending_message->msg = (struct GNUNET_MessageHeader *) &pending_message[1];
837 memcpy (&pending_message[1], received_msg, size);
838 GNUNET_free (received_msg);
840 GNUNET_CONTAINER_DLL_insert_after (plugin_pending_head, plugin_pending_tail,
841 plugin_pending_tail, pending_message);
843 if (client_handle != NULL)
845 if (plugin_transmit_handle == NULL)
847 plugin_transmit_handle =
848 GNUNET_SERVER_notify_transmit_ready (client_handle, size,
849 GNUNET_TIME_UNIT_FOREVER_REL,
850 &transmit_to_plugin, NULL);
855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
856 "Failed to queue message for plugin, client_handle not yet set (how?)!\n");
860 /* Declare here so retry_core_send is aware of it */
861 size_t core_transmit_notify (void *cls, size_t size, void *buf);
864 * Try to send another message from our core sending list
867 try_core_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
869 struct PendingMessage *pending;
871 pending = core_pending_head;
873 if (core_transmit_handle != NULL)
874 return; /* Message send already in progress */
876 if ((pending != NULL) && (coreAPI != NULL))
877 core_transmit_handle =
878 GNUNET_CORE_notify_transmit_ready (coreAPI, GNUNET_YES,
883 &core_transmit_notify, NULL);
888 * Function called to notify a client about the socket
889 * being ready to queue more data. "buf" will be
890 * NULL and "size" zero if the socket was closed for
891 * writing in the meantime.
893 * @param cls closure (NULL)
894 * @param size number of bytes available in buf
895 * @param buf where the callee should write the message
896 * @return number of bytes written to buf
899 core_transmit_notify (void *cls, size_t size, void *buf)
902 struct PendingMessage *pending;
903 struct PendingMessage *client_reply;
909 /* client disconnected */
911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "`%s': buffer was NULL\n", "DHT");
916 core_transmit_handle = NULL;
918 pending = core_pending_head;
919 if ((pending != NULL) && (size >= (msize = ntohs (pending->msg->size))))
922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
923 "`%s' : transmit_notify (core) called with size %d\n",
924 "dv service", msize);
926 GNUNET_CONTAINER_DLL_remove (core_pending_head, core_pending_tail, pending);
927 if (pending->send_result != NULL) /* Will only be non-null if a real client asked for this send */
930 GNUNET_malloc (sizeof (struct PendingMessage) +
931 sizeof (struct GNUNET_DV_SendResultMessage));
932 client_reply->msg = (struct GNUNET_MessageHeader *) &client_reply[1];
933 memcpy (&client_reply[1], pending->send_result,
934 sizeof (struct GNUNET_DV_SendResultMessage));
935 GNUNET_free (pending->send_result);
937 GNUNET_CONTAINER_DLL_insert_after (plugin_pending_head,
939 plugin_pending_tail, client_reply);
940 if (client_handle != NULL)
942 if (plugin_transmit_handle == NULL)
944 plugin_transmit_handle =
945 GNUNET_SERVER_notify_transmit_ready (client_handle,
947 GNUNET_DV_SendResultMessage),
948 GNUNET_TIME_UNIT_FOREVER_REL,
949 &transmit_to_plugin, NULL);
953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
954 "Failed to queue message for plugin, must be one in progress already!!\n");
958 memcpy (&cbuf[off], pending->msg, msize);
959 GNUNET_free (pending);
962 /*reply = core_pending_head; */
964 GNUNET_SCHEDULER_add_now (&try_core_send, NULL);
966 * core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, GNUNET_YES, reply->importance, reply->timeout, &reply->recipient, reply->msg_size, &core_transmit_notify, NULL); */
973 * Send a DV data message via DV.
975 * @param sender the original sender of the message
976 * @param recipient the next hop recipient, may be our direct peer, maybe not
977 * @param send_context the send context
980 send_message_via (const struct GNUNET_PeerIdentity *sender,
981 const struct GNUNET_PeerIdentity *recipient,
982 struct DV_SendContext *send_context)
984 p2p_dv_MESSAGE_Data *toSend;
985 unsigned int msg_size;
986 unsigned int recipient_id;
987 unsigned int sender_id;
988 struct DistantNeighbor *source;
989 struct PendingMessage *pending_message;
990 struct FindIDContext find_context;
996 msg_size = send_context->message_size + sizeof (p2p_dv_MESSAGE_Data);
998 find_context.dest = send_context->distant_peer;
999 find_context.via = recipient;
1000 find_context.tid = 0;
1001 GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors,
1002 &send_context->distant_peer->
1003 hashPubKey, &find_specific_id,
1006 if (find_context.tid == 0)
1008 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1009 "%s: find_specific_id failed to find peer!\n", my_short_id);
1010 /* target unknown to us, drop! */
1011 return GNUNET_SYSERR;
1013 recipient_id = find_context.tid;
1015 if (0 == (memcmp (&my_identity, sender, sizeof (struct GNUNET_PeerIdentity))))
1019 GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1020 &sender->hashPubKey);
1022 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1023 "%s: send_message_via found %s, myself in extended peer list???\n",
1024 my_short_id, GNUNET_i2s (&source->identity));
1029 GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1030 &sender->hashPubKey);
1033 /* sender unknown to us, drop! */
1034 return GNUNET_SYSERR;
1036 sender_id = source->our_id;
1039 pending_message = GNUNET_malloc (sizeof (struct PendingMessage) + msg_size);
1040 pending_message->msg = (struct GNUNET_MessageHeader *) &pending_message[1];
1041 pending_message->send_result = send_context->send_result;
1042 memcpy (&pending_message->recipient, recipient,
1043 sizeof (struct GNUNET_PeerIdentity));
1044 pending_message->msg_size = msg_size;
1045 pending_message->importance = send_context->importance;
1046 pending_message->timeout = send_context->timeout;
1047 toSend = (p2p_dv_MESSAGE_Data *) pending_message->msg;
1048 toSend->header.size = htons (msg_size);
1049 toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA);
1050 toSend->sender = htonl (sender_id);
1051 toSend->recipient = htonl (recipient_id);
1052 #if DEBUG_DV_MESSAGES
1053 toSend->uid = send_context->uid; /* Still sent around in network byte order */
1055 toSend->uid = htonl (0);
1058 memcpy (&toSend[1], send_context->message, send_context->message_size);
1061 memcpy (&shortname, GNUNET_i2s (send_context->distant_peer), 4);
1062 shortname[4] = '\0';
1063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1064 "%s: Notifying core of send to destination `%s' via `%s' size %u\n",
1065 "DV", &shortname, GNUNET_i2s (recipient), msg_size);
1068 GNUNET_CONTAINER_DLL_insert_after (core_pending_head, core_pending_tail,
1069 core_pending_tail, pending_message);
1071 GNUNET_SCHEDULER_add_now (try_core_send, NULL);
1077 * Given a FindLeastCostContext, and a set
1078 * of peers that match the target, return the cheapest.
1080 * @param cls closure, a struct FindLeastCostContext
1081 * @param key the key identifying the target peer
1082 * @param value the target peer
1084 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
1087 find_least_cost_peer (void *cls, const GNUNET_HashCode * key, void *value)
1089 struct FindLeastCostContext *find_context = cls;
1090 struct DistantNeighbor *dn = value;
1092 if (dn->cost < find_context->least_cost)
1094 find_context->target = dn;
1096 if (dn->cost == DIRECT_NEIGHBOR_COST)
1102 * Send a DV data message via DV.
1104 * @param recipient the ultimate recipient of this message
1105 * @param sender the original sender of the message
1106 * @param specific_neighbor the specific neighbor to send this message via
1107 * @param message the packed message
1108 * @param message_size size of the message
1109 * @param importance what priority to send this message with
1110 * @param uid the unique identifier of this message (or 0 for none)
1111 * @param timeout how long to possibly delay sending this message
1114 send_message (const struct GNUNET_PeerIdentity *recipient,
1115 const struct GNUNET_PeerIdentity *sender,
1116 const struct DistantNeighbor *specific_neighbor,
1117 const struct GNUNET_MessageHeader *message, size_t message_size,
1118 unsigned int importance, unsigned int uid,
1119 struct GNUNET_TIME_Relative timeout)
1121 p2p_dv_MESSAGE_Data *toSend;
1122 unsigned int msg_size;
1124 unsigned int recipient_id;
1125 unsigned int sender_id;
1126 struct DistantNeighbor *target;
1127 struct DistantNeighbor *source;
1128 struct PendingMessage *pending_message;
1129 struct FindLeastCostContext find_least_ctx;
1131 #if DEBUG_DV_PEER_NUMBERS
1132 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerFrom;
1133 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerTo;
1134 struct GNUNET_CRYPTO_HashAsciiEncoded encPeerVia;
1136 msg_size = message_size + sizeof (p2p_dv_MESSAGE_Data);
1138 find_least_ctx.least_cost = -1;
1139 find_least_ctx.target = NULL;
1141 * Need to find the least cost peer, lest the transport selection keep
1142 * picking the same DV route for the same destination which results
1143 * in messages looping forever. Relatively cheap, we don't iterate
1144 * over all known peers, just those that apply.
1146 GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors,
1147 &recipient->hashPubKey,
1148 &find_least_cost_peer,
1150 target = find_least_ctx.target;
1154 /* target unknown to us, drop! */
1155 return GNUNET_SYSERR;
1157 recipient_id = target->referrer_id;
1160 GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1161 &sender->hashPubKey);
1165 (memcmp (&my_identity, sender, sizeof (struct GNUNET_PeerIdentity))))
1167 /* sender unknown to us, drop! */
1168 return GNUNET_SYSERR;
1170 sender_id = 0; /* 0 == us */
1174 /* find out the number that we use when we gossip about
1176 sender_id = source->our_id;
1179 #if DEBUG_DV_PEER_NUMBERS
1180 GNUNET_CRYPTO_hash_to_enc (&source->identity.hashPubKey, &encPeerFrom);
1181 GNUNET_CRYPTO_hash_to_enc (&target->referrer->identity.hashPubKey,
1183 encPeerFrom.encoding[4] = '\0';
1184 encPeerVia.encoding[4] = '\0';
1186 if ((sender_id != 0) &&
1188 memcmp (&source->identity, &target->referrer->identity,
1189 sizeof (struct GNUNET_PeerIdentity))))
1194 cost = target->cost;
1195 pending_message = GNUNET_malloc (sizeof (struct PendingMessage) + msg_size);
1196 pending_message->msg = (struct GNUNET_MessageHeader *) &pending_message[1];
1197 pending_message->send_result = NULL;
1198 pending_message->importance = importance;
1199 pending_message->timeout = timeout;
1200 memcpy (&pending_message->recipient, &target->referrer->identity,
1201 sizeof (struct GNUNET_PeerIdentity));
1202 pending_message->msg_size = msg_size;
1203 toSend = (p2p_dv_MESSAGE_Data *) pending_message->msg;
1204 toSend->header.size = htons (msg_size);
1205 toSend->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DATA);
1206 toSend->sender = htonl (sender_id);
1207 toSend->recipient = htonl (recipient_id);
1208 #if DEBUG_DV_MESSAGES
1209 toSend->uid = htonl (uid);
1211 toSend->uid = htonl (0);
1214 #if DEBUG_DV_PEER_NUMBERS
1215 GNUNET_CRYPTO_hash_to_enc (&target->identity.hashPubKey, &encPeerTo);
1216 encPeerTo.encoding[4] = '\0';
1217 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1218 "%s: Sending DATA message. Sender id %u, source %s, destination %s, via %s\n",
1219 GNUNET_i2s (&my_identity), sender_id, &encPeerFrom, &encPeerTo,
1222 memcpy (&toSend[1], message, message_size);
1223 if ((source != NULL) && (source->pkey == NULL)) /* Test our hypothesis about message failures! */
1225 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1226 "%s: Sending message, but anticipate recipient will not know sender!!!\n\n\n",
1229 GNUNET_CONTAINER_DLL_insert_after (core_pending_head, core_pending_tail,
1230 core_pending_tail, pending_message);
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1233 "%s: Notifying core of send size %d to destination `%s'\n",
1234 "DV SEND MESSAGE", msg_size, GNUNET_i2s (recipient));
1237 GNUNET_SCHEDULER_add_now (try_core_send, NULL);
1242 struct CheckPeerContext
1247 struct DistantNeighbor *peer;
1250 * Sender id to search for
1252 unsigned int sender_id;
1256 * Iterator over hash map entries.
1258 * @param cls closure
1259 * @param key current key code
1260 * @param value value in the hash map
1261 * @return GNUNET_YES if we should continue to
1266 checkPeerID (void *cls, const GNUNET_HashCode * key, void *value)
1268 struct CheckPeerContext *ctx = cls;
1269 struct DistantNeighbor *distant = value;
1271 if (memcmp (key, &ctx->sender_id, sizeof (unsigned int)) == 0)
1273 ctx->peer = distant;
1283 * Handler for messages parsed out by the tokenizer from
1284 * DV DATA received for this peer.
1287 * @param client the TokenizedMessageContext which contains message information
1288 * @param message the actual message
1291 tokenized_message_handler (void *cls, void *client,
1292 const struct GNUNET_MessageHeader *message)
1294 struct TokenizedMessageContext *ctx = client;
1296 GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP);
1297 GNUNET_break_op (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA);
1298 if ((ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_GOSSIP) &&
1299 (ntohs (message->type) != GNUNET_MESSAGE_TYPE_DV_DATA))
1301 #if DEBUG_DV_MESSAGES
1302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1303 "%s: Receives %s message for me, uid %u, size %d, type %d cost %u from %s!\n",
1304 my_short_id, "DV DATA", ctx->uid, ntohs (message->size),
1305 ntohs (message->type), ctx->distant->cost,
1306 GNUNET_i2s (&ctx->distant->identity));
1308 GNUNET_assert (memcmp
1309 (ctx->peer, &ctx->distant->identity,
1310 sizeof (struct GNUNET_PeerIdentity)) != 0);
1311 send_to_plugin (ctx->peer, message, ntohs (message->size),
1312 &ctx->distant->identity, ctx->distant->cost);
1317 struct DelayedMessageContext
1319 struct GNUNET_PeerIdentity dest;
1320 struct GNUNET_PeerIdentity sender;
1321 struct GNUNET_MessageHeader *message;
1322 size_t message_size;
1327 send_message_delayed (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1329 struct DelayedMessageContext *msg_ctx = cls;
1331 if (msg_ctx != NULL)
1333 send_message (&msg_ctx->dest, &msg_ctx->sender, NULL, msg_ctx->message,
1334 msg_ctx->message_size, default_dv_priority, msg_ctx->uid,
1335 GNUNET_TIME_relative_get_forever ());
1336 GNUNET_free (msg_ctx->message);
1337 GNUNET_free (msg_ctx);
1343 * Get distance information from 'atsi'.
1345 * @param atsi performance data
1346 * @return connected transport distance
1349 get_atsi_distance (const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1351 while ((ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) &&
1352 (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE))
1354 if (ntohl (atsi->type) == GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR)
1357 /* FIXME: we do not have distance data? Assume direct neighbor. */
1358 return DIRECT_NEIGHBOR_COST;
1360 return ntohl (atsi->value);
1364 * Find latency information in 'atsi'.
1366 * @param atsi performance data
1367 * @return connection latency
1369 static struct GNUNET_TIME_Relative
1370 get_atsi_latency (const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1372 while ((ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR) &&
1373 (ntohl (atsi->type) != GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY))
1375 if (ntohl (atsi->type) == GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR)
1378 /* how can we not have latency data? */
1379 return GNUNET_TIME_UNIT_SECONDS;
1381 /* FIXME: Multiply by GNUNET_TIME_UNIT_MILLISECONDS (1) to get as a GNUNET_TIME_Relative */
1382 return GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
1383 ntohl (atsi->value));
1387 * Core handler for dv data messages. Whatever this message
1388 * contains all we really have to do is rip it out of its
1389 * DV layering and give it to our pal the DV plugin to report
1392 * @param cls closure
1393 * @param peer peer which sent the message (immediate sender)
1394 * @param message the message
1395 * @param atsi transport ATS information (latency, distance, etc.)
1398 handle_dv_data_message (void *cls, const struct GNUNET_PeerIdentity *peer,
1399 const struct GNUNET_MessageHeader *message,
1400 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1402 const p2p_dv_MESSAGE_Data *incoming = (const p2p_dv_MESSAGE_Data *) message;
1403 const struct GNUNET_MessageHeader *packed_message;
1404 struct DirectNeighbor *dn;
1405 struct DistantNeighbor *pos;
1406 unsigned int sid; /* Sender id */
1407 unsigned int tid; /* Target id */
1408 struct GNUNET_PeerIdentity *original_sender;
1409 struct GNUNET_PeerIdentity *destination;
1410 struct FindDestinationContext fdc;
1411 struct TokenizedMessageContext tkm_ctx;
1416 struct DelayedMessageContext *delayed_context;
1419 struct CheckPeerContext checkPeerCtx;
1421 #if DEBUG_DV_MESSAGES
1425 size_t packed_message_size;
1427 uint32_t distance; /* Distance information */
1428 struct GNUNET_TIME_Relative latency; /* Latency information */
1430 packed_message_size =
1431 ntohs (incoming->header.size) - sizeof (p2p_dv_MESSAGE_Data);
1433 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1434 "%s: Receives DATA message from %s size %d, packed size %d!\n",
1435 my_short_id, GNUNET_i2s (peer), ntohs (incoming->header.size),
1436 packed_message_size);
1439 if (ntohs (incoming->header.size) <
1440 sizeof (p2p_dv_MESSAGE_Data) + sizeof (struct GNUNET_MessageHeader))
1443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1444 "`%s': Message sizes don't add up, total size %u, expected at least %u!\n",
1445 "dv service", ntohs (incoming->header.size),
1446 sizeof (p2p_dv_MESSAGE_Data) +
1447 sizeof (struct GNUNET_MessageHeader));
1449 return GNUNET_SYSERR;
1452 /* Iterate over ATS_Information to get distance and latency */
1453 latency = get_atsi_latency (atsi);
1454 distance = get_atsi_distance (atsi);
1455 dn = GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
1459 sid = ntohl (incoming->sender);
1463 checkPeerCtx.sender_id = sid;
1464 checkPeerCtx.peer = NULL;
1465 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &checkPeerID,
1467 pos = checkPeerCtx.peer;
1472 GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
1476 pos = dn->referee_head;
1477 while ((NULL != pos) && (pos->referrer_id != sid))
1483 #if DEBUG_DV_MESSAGES
1484 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1485 "%s: unknown sender (%u), Message uid %u from %s!\n",
1486 my_short_id, ntohl (incoming->sender), ntohl (incoming->uid),
1487 GNUNET_i2s (&dn->identity));
1488 pos = dn->referee_head;
1489 while ((NULL != pos) && (pos->referrer_id != sid))
1491 sender_id = strdup (GNUNET_i2s (&pos->identity));
1492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "I know sender %u %s\n",
1493 pos->referrer_id, sender_id);
1494 GNUNET_free (sender_id);
1500 for (i = 0; i < MAX_OUTSTANDING_MESSAGES; i++)
1502 if (dn->pending_messages[i].sender_id == 0)
1509 if (found_pos == -1)
1511 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1512 "%s: Too many unknown senders (%u), ignoring message! Message uid %llu from %s!\n",
1513 my_short_id, ntohl (incoming->sender), ntohl (incoming->uid),
1514 GNUNET_i2s (&dn->identity));
1518 dn->pending_messages[found_pos].message =
1519 GNUNET_malloc (ntohs (message->size));
1520 memcpy (dn->pending_messages[found_pos].message, message,
1521 ntohs (message->size));
1522 dn->pending_messages[found_pos].distance = distance;
1523 dn->pending_messages[found_pos].latency = latency;
1524 memcpy (&dn->pending_messages[found_pos].sender, peer,
1525 sizeof (struct GNUNET_PeerIdentity));
1526 dn->pending_messages[found_pos].sender_id = sid;
1528 /* unknown sender */
1531 original_sender = &pos->identity;
1532 tid = ntohl (incoming->recipient);
1536 cbuf = (char *) &incoming[1];
1538 tkm_ctx.peer = peer;
1539 tkm_ctx.distant = pos;
1540 tkm_ctx.uid = ntohl (incoming->uid);
1542 GNUNET_SERVER_mst_receive (coreMST, &tkm_ctx, cbuf, packed_message_size,
1543 GNUNET_NO, GNUNET_NO))
1545 GNUNET_break_op (0);
1546 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1547 "%s: %s Received corrupt data, discarding!", my_short_id,
1554 packed_message = (struct GNUNET_MessageHeader *) &incoming[1];
1557 /* FIXME: this is the *only* per-request operation we have in DV
1558 * that is O(n) in relation to the number of connected peers; a
1559 * hash-table lookup could easily solve this (minor performance
1563 GNUNET_CONTAINER_heap_iterate (neighbor_max_heap, &find_destination, &fdc);
1566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1567 "%s: Receives %s message for someone else!\n", "dv", "DV DATA");
1570 if (fdc.dest == NULL)
1572 #if DEBUG_DV_MESSAGES
1573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1574 "%s: Receives %s message uid %u for someone we don't know (id %u)!\n",
1575 my_short_id, "DV DATA", ntohl (incoming->uid), tid);
1579 destination = &fdc.dest->identity;
1581 if (0 == memcmp (destination, peer, sizeof (struct GNUNET_PeerIdentity)))
1583 /* FIXME: create stat: routing loop-discard! */
1585 #if DEBUG_DV_MESSAGES
1586 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1587 "%s: DROPPING MESSAGE uid %u type %d, routing loop! Message immediately from %s!\n",
1588 my_short_id, ntohl (incoming->uid),
1589 ntohs (packed_message->type), GNUNET_i2s (&dn->identity));
1594 /* At this point we have a message, and we need to forward it on to the
1597 #if DEBUG_DV_MESSAGES
1598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1599 "%s: FORWARD %s message for %s, uid %u, size %d type %d, cost %u!\n",
1600 my_short_id, "DV DATA", GNUNET_i2s (destination),
1601 ntohl (incoming->uid), ntohs (packed_message->size),
1602 ntohs (packed_message->type), pos->cost);
1606 if (GNUNET_TIME_absolute_get_duration (pos->last_gossip).abs_value <
1607 GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 2).abs_value)
1609 delayed_context = GNUNET_malloc (sizeof (struct DelayedMessageContext));
1610 memcpy (&delayed_context->dest, destination,
1611 sizeof (struct GNUNET_PeerIdentity));
1612 memcpy (&delayed_context->sender, original_sender,
1613 sizeof (struct GNUNET_PeerIdentity));
1614 delayed_context->message = GNUNET_malloc (packed_message_size);
1615 memcpy (delayed_context->message, packed_message, packed_message_size);
1616 delayed_context->message_size = packed_message_size;
1617 delayed_context->uid = ntohl (incoming->uid);
1618 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
1619 (GNUNET_TIME_UNIT_MILLISECONDS, 2500),
1620 &send_message_delayed, delayed_context);
1627 send_message (destination, original_sender, NULL, packed_message,
1628 packed_message_size, default_dv_priority,
1629 ntohl (incoming->uid),
1630 GNUNET_TIME_relative_get_forever ());
1632 if (ret != GNUNET_SYSERR)
1636 #if DEBUG_MESSAGE_DROP
1637 char *direct_id = GNUNET_strdup (GNUNET_i2s (&dn->identity));
1639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1640 "%s: DROPPING MESSAGE type %d, forwarding failed! Message immediately from %s!\n",
1641 GNUNET_i2s (&my_identity),
1642 ntohs (((struct GNUNET_MessageHeader *) &incoming[1])->type),
1644 GNUNET_free (direct_id);
1646 return GNUNET_SYSERR;
1652 * Iterator over hash map entries.
1654 * @param cls closure (NULL)
1655 * @param key current key code
1656 * @param value value in the hash map (DistantNeighbor)
1657 * @return GNUNET_YES if we should continue to
1662 print_neighbors (void *cls, const GNUNET_HashCode * key, void *abs_value)
1664 struct DistantNeighbor *distant_neighbor = abs_value;
1665 char my_shortname[5];
1666 char referrer_shortname[5];
1668 memcpy (&my_shortname, GNUNET_i2s (&my_identity), 4);
1669 my_shortname[4] = '\0';
1670 memcpy (&referrer_shortname,
1671 GNUNET_i2s (&distant_neighbor->referrer->identity), 4);
1672 referrer_shortname[4] = '\0';
1674 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1675 "`%s' %s: Peer `%s', distance %d, referrer `%s' pkey: %s\n",
1676 &my_shortname, "DV", GNUNET_i2s (&distant_neighbor->identity),
1677 distant_neighbor->cost, &referrer_shortname,
1678 distant_neighbor->pkey == NULL ? "no" : "yes");
1684 * Scheduled task which gossips about known direct peers to other connected
1685 * peers. Will run until called with reason shutdown.
1688 neighbor_send_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1690 struct NeighborSendContext *send_context = cls;
1692 #if DEBUG_DV_GOSSIP_SEND
1696 struct DistantNeighbor *about;
1697 struct DirectNeighbor *to;
1698 struct FastGossipNeighborList *about_list;
1700 p2p_dv_MESSAGE_NeighborInfo *message;
1701 struct PendingMessage *pending_message;
1703 if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
1706 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1707 "%s: Called with reason shutdown, shutting down!\n",
1708 GNUNET_i2s (&my_identity));
1713 if (send_context->fast_gossip_list_head != NULL)
1715 about_list = send_context->fast_gossip_list_head;
1716 about = about_list->about;
1717 GNUNET_CONTAINER_DLL_remove (send_context->fast_gossip_list_head,
1718 send_context->fast_gossip_list_tail,
1720 GNUNET_free (about_list);
1724 /* FIXME: this may become a problem, because the heap walk has only one internal "walker". This means
1725 * that if two neighbor_send_tasks are operating in lockstep (which is quite possible, given default
1726 * values for all connected peers) there may be a serious bias as to which peers get gossiped about!
1727 * Probably the *best* way to fix would be to have an opaque pointer to the walk position passed as
1728 * part of the walk_get_next call. Then the heap would have to keep a list of walks, or reset the walk
1729 * whenever a modification has been detected. Yuck either way. Perhaps we could iterate over the heap
1730 * once to get a list of peers to gossip about and gossip them over time... But then if one goes away
1731 * in the mean time that becomes nasty. For now we'll just assume that the walking is done
1732 * asynchronously enough to avoid major problems (-;
1734 * NOTE: probably fixed once we decided send rate based on allowed bandwidth.
1736 about = GNUNET_CONTAINER_heap_walk_get_next (neighbor_min_heap);
1738 to = send_context->toNeighbor;
1740 if ((about != NULL) && (to != about->referrer /* split horizon */ ) &&
1742 (about->hidden == GNUNET_NO) &&
1746 memcmp (&about->identity, &to->identity,
1747 sizeof (struct GNUNET_PeerIdentity))) && (about->pkey != NULL))
1749 #if DEBUG_DV_GOSSIP_SEND
1750 encPeerAbout = GNUNET_strdup (GNUNET_i2s (&about->identity));
1751 encPeerTo = GNUNET_strdup (GNUNET_i2s (&to->identity));
1752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1753 "%s: Sending info about peer %s id %u to directly connected peer %s\n",
1754 GNUNET_i2s (&my_identity), encPeerAbout, about->our_id,
1756 GNUNET_free (encPeerAbout);
1757 GNUNET_free (encPeerTo);
1759 about->last_gossip = GNUNET_TIME_absolute_get ();
1761 GNUNET_malloc (sizeof (struct PendingMessage) +
1762 sizeof (p2p_dv_MESSAGE_NeighborInfo));
1763 pending_message->msg = (struct GNUNET_MessageHeader *) &pending_message[1];
1764 pending_message->importance = default_dv_priority;
1765 pending_message->timeout = GNUNET_TIME_relative_get_forever ();
1766 memcpy (&pending_message->recipient, &to->identity,
1767 sizeof (struct GNUNET_PeerIdentity));
1768 pending_message->msg_size = sizeof (p2p_dv_MESSAGE_NeighborInfo);
1769 message = (p2p_dv_MESSAGE_NeighborInfo *) pending_message->msg;
1770 message->header.size = htons (sizeof (p2p_dv_MESSAGE_NeighborInfo));
1771 message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_GOSSIP);
1772 message->cost = htonl (about->cost);
1773 message->neighbor_id = htonl (about->our_id);
1775 memcpy (&message->pkey, about->pkey,
1776 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
1777 memcpy (&message->neighbor, &about->identity,
1778 sizeof (struct GNUNET_PeerIdentity));
1780 GNUNET_CONTAINER_DLL_insert_after (core_pending_head, core_pending_tail,
1781 core_pending_tail, pending_message);
1783 GNUNET_SCHEDULER_add_now (try_core_send, NULL);
1784 /*if (core_transmit_handle == NULL)
1785 * core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, GNUNET_YES, default_dv_priority, GNUNET_TIME_relative_get_forever(), &to->identity, sizeof(p2p_dv_MESSAGE_NeighborInfo), &core_transmit_notify, NULL); */
1789 if (send_context->fast_gossip_list_head != NULL) /* If there are other peers in the fast list, schedule right away */
1791 #if DEBUG_DV_PEER_NUMBERS
1792 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1793 "DV SERVICE: still in fast send mode\n");
1795 send_context->task =
1796 GNUNET_SCHEDULER_add_now (&neighbor_send_task, send_context);
1800 #if DEBUG_DV_PEER_NUMBERS
1801 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1802 "DV SERVICE: entering slow send mode\n");
1804 send_context->task =
1805 GNUNET_SCHEDULER_add_delayed (GNUNET_DV_DEFAULT_SEND_INTERVAL,
1806 &neighbor_send_task, send_context);
1814 * Handle START-message. This is the first message sent to us
1815 * by the client (can only be one!).
1817 * @param cls closure (always NULL)
1818 * @param client identification of the client
1819 * @param message the actual message
1822 handle_start (void *cls, struct GNUNET_SERVER_Client *client,
1823 const struct GNUNET_MessageHeader *message)
1827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' request from client\n",
1831 client_handle = client;
1833 GNUNET_SERVER_client_keep (client_handle);
1834 GNUNET_SERVER_receive_done (client, GNUNET_OK);
1839 * Iterate over hash map entries for a distant neighbor,
1840 * if direct neighbor matches context call send message
1842 * @param cls closure, a DV_SendContext
1843 * @param key current key code
1844 * @param value value in the hash map
1845 * @return GNUNET_YES if we should continue to
1850 send_iterator (void *cls, const GNUNET_HashCode * key, void *abs_value)
1852 struct DV_SendContext *send_context = cls;
1853 struct DistantNeighbor *distant_neighbor = abs_value;
1855 if (memcmp (distant_neighbor->referrer, send_context->direct_peer, sizeof (struct GNUNET_PeerIdentity)) == 0) /* They match, send and free */
1857 send_message_via (&my_identity, distant_neighbor, send_context);
1865 * Service server's handler for message send requests (which come
1866 * bubbling up to us through the DV plugin).
1868 * @param cls closure
1869 * @param client identification of the client
1870 * @param message the actual message
1873 handle_dv_send_message (void *cls, struct GNUNET_SERVER_Client *client,
1874 const struct GNUNET_MessageHeader *message)
1876 struct GNUNET_DV_SendMessage *send_msg;
1877 struct GNUNET_DV_SendResultMessage *send_result_msg;
1878 struct PendingMessage *pending_message;
1880 size_t message_size;
1881 struct GNUNET_PeerIdentity *destination;
1882 struct GNUNET_PeerIdentity *direct;
1883 struct GNUNET_MessageHeader *message_buf;
1886 static struct GNUNET_CRYPTO_HashAsciiEncoded dest_hash;
1887 struct DV_SendContext *send_context;
1889 #if DEBUG_DV_MESSAGES
1891 struct GNUNET_MessageHeader *packed_message;
1894 if (client_handle == NULL)
1896 client_handle = client;
1897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1898 "%s: Setting initial client handle, never received `%s' message?\n",
1901 else if (client_handle != client)
1903 client_handle = client;
1904 /* What should we do in this case, assert fail or just log the warning? */
1906 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1907 "%s: Setting client handle (was a different client!)!\n", "dv");
1911 GNUNET_assert (ntohs (message->size) > sizeof (struct GNUNET_DV_SendMessage));
1912 send_msg = (struct GNUNET_DV_SendMessage *) message;
1914 address_len = ntohl (send_msg->addrlen);
1915 GNUNET_assert (address_len == sizeof (struct GNUNET_PeerIdentity) * 2);
1917 ntohs (message->size) - sizeof (struct GNUNET_DV_SendMessage) -
1919 destination = GNUNET_malloc (sizeof (struct GNUNET_PeerIdentity));
1920 direct = GNUNET_malloc (sizeof (struct GNUNET_PeerIdentity));
1921 message_buf = GNUNET_malloc (message_size);
1923 temp_pos = (char *) &send_msg[1]; /* Set pointer to end of message */
1924 offset = 0; /* Offset starts at zero */
1926 memcpy (destination, &temp_pos[offset], sizeof (struct GNUNET_PeerIdentity));
1927 offset += sizeof (struct GNUNET_PeerIdentity);
1929 memcpy (direct, &temp_pos[offset], sizeof (struct GNUNET_PeerIdentity));
1930 offset += sizeof (struct GNUNET_PeerIdentity);
1933 memcpy (message_buf, &temp_pos[offset], message_size);
1935 (&send_msg->target, destination,
1936 sizeof (struct GNUNET_PeerIdentity)) != 0)
1938 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1939 dest_hash.encoding[4] = '\0';
1940 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1941 "%s: asked to send message to `%s', but address is for `%s'!",
1942 "DV SERVICE", GNUNET_i2s (&send_msg->target),
1943 (const char *) &dest_hash.encoding);
1946 #if DEBUG_DV_MESSAGES
1947 cbuf = (char *) message_buf;
1949 while (offset < message_size)
1951 packed_message = (struct GNUNET_MessageHeader *) &cbuf[offset];
1952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1953 "%s: DV PLUGIN SEND uid %u type %d to %s\n", my_short_id,
1954 ntohl (send_msg->uid), ntohs (packed_message->type),
1955 GNUNET_i2s (destination));
1956 offset += ntohs (packed_message->size);
1958 /*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)); */
1960 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
1961 dest_hash.encoding[4] = '\0';
1962 send_context = GNUNET_malloc (sizeof (struct DV_SendContext));
1964 send_result_msg = GNUNET_malloc (sizeof (struct GNUNET_DV_SendResultMessage));
1965 send_result_msg->header.size =
1966 htons (sizeof (struct GNUNET_DV_SendResultMessage));
1967 send_result_msg->header.type =
1968 htons (GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND_RESULT);
1969 send_result_msg->uid = send_msg->uid; /* No need to ntohl->htonl this */
1971 send_context->importance = ntohl (send_msg->priority);
1972 send_context->timeout = send_msg->timeout;
1973 send_context->direct_peer = direct;
1974 send_context->distant_peer = destination;
1975 send_context->message = message_buf;
1976 send_context->message_size = message_size;
1977 send_context->send_result = send_result_msg;
1978 #if DEBUG_DV_MESSAGES
1979 send_context->uid = send_msg->uid;
1982 if (send_message_via (&my_identity, direct, send_context) != GNUNET_YES)
1984 send_result_msg->result = htons (1);
1986 GNUNET_malloc (sizeof (struct PendingMessage) +
1987 sizeof (struct GNUNET_DV_SendResultMessage));
1988 pending_message->msg = (struct GNUNET_MessageHeader *) &pending_message[1];
1989 memcpy (&pending_message[1], send_result_msg,
1990 sizeof (struct GNUNET_DV_SendResultMessage));
1991 GNUNET_free (send_result_msg);
1993 GNUNET_CONTAINER_DLL_insert_after (plugin_pending_head, plugin_pending_tail,
1994 plugin_pending_tail, pending_message);
1996 if (client_handle != NULL)
1998 if (plugin_transmit_handle == NULL)
2000 plugin_transmit_handle =
2001 GNUNET_SERVER_notify_transmit_ready (client_handle,
2003 GNUNET_DV_SendResultMessage),
2004 GNUNET_TIME_UNIT_FOREVER_REL,
2005 &transmit_to_plugin, NULL);
2009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2010 "Failed to queue message for plugin, must be one in progress already!!\n");
2013 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
2014 dest_hash.encoding[4] = '\0';
2015 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2016 "%s DV SEND failed to send message to destination `%s' via `%s'\n",
2017 my_short_id, (const char *) &dest_hash.encoding,
2018 GNUNET_i2s (direct));
2021 /* In bizarro world GNUNET_SYSERR indicates that we succeeded */
2023 if (GNUNET_SYSERR !=
2024 GNUNET_CONTAINER_multihashmap_get_multiple (extended_neighbors,
2025 &destination->hashPubKey,
2026 &send_iterator, send_context))
2028 send_result_msg->result = htons (1);
2030 GNUNET_malloc (sizeof (struct PendingMessage) +
2031 sizeof (struct GNUNET_DV_SendResultMessage));
2032 pending_message->msg = (struct GNUNET_MessageHeader *) &pending_message[1];
2033 memcpy (&pending_message[1], send_result_msg,
2034 sizeof (struct GNUNET_DV_SendResultMessage));
2035 GNUNET_free (send_result_msg);
2037 GNUNET_CONTAINER_DLL_insert_after (plugin_pending_head, plugin_pending_tail,
2038 plugin_pending_tail, pending_message);
2040 if (client_handle != NULL)
2042 if (plugin_transmit_handle == NULL)
2044 plugin_transmit_handle =
2045 GNUNET_SERVER_notify_transmit_ready (client_handle,
2047 GNUNET_DV_SendResultMessage),
2048 GNUNET_TIME_UNIT_FOREVER_REL,
2049 &transmit_to_plugin, NULL);
2053 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2054 "Failed to queue message for plugin, must be one in progress already!!\n");
2057 GNUNET_CRYPTO_hash_to_enc (&destination->hashPubKey, &dest_hash); /* GNUNET_i2s won't properly work, need to hash one ourselves */
2058 dest_hash.encoding[4] = '\0';
2059 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2060 "%s DV SEND failed to send message to destination `%s' via `%s'\n",
2061 my_short_id, (const char *) &dest_hash.encoding,
2062 GNUNET_i2s (direct));
2065 GNUNET_free (message_buf);
2066 GNUNET_free (send_context);
2067 GNUNET_free (direct);
2068 GNUNET_free (destination);
2070 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2073 /** Forward declarations **/
2074 static int handle_dv_gossip_message (void *cls,
2075 const struct GNUNET_PeerIdentity *peer,
2076 const struct GNUNET_MessageHeader *message,
2078 GNUNET_TRANSPORT_ATS_Information *atsi);
2080 static int handle_dv_disconnect_message (void *cls,
2081 const struct GNUNET_PeerIdentity *peer,
2082 const struct GNUNET_MessageHeader
2085 GNUNET_TRANSPORT_ATS_Information
2087 /** End forward declarations **/
2091 * List of handlers for the messages understood by this
2094 * Hmm... will we need to register some handlers with core and
2095 * some handlers with our server here? Because core should be
2096 * getting the incoming DV messages (from whichever lower level
2097 * transport) and then our server should be getting messages
2098 * from the dv_plugin, right?
2100 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2101 {&handle_dv_data_message, GNUNET_MESSAGE_TYPE_DV_DATA, 0},
2102 {&handle_dv_gossip_message, GNUNET_MESSAGE_TYPE_DV_GOSSIP, 0},
2103 {&handle_dv_disconnect_message, GNUNET_MESSAGE_TYPE_DV_DISCONNECT, 0},
2107 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
2108 {&handle_dv_send_message, NULL, GNUNET_MESSAGE_TYPE_TRANSPORT_DV_SEND, 0},
2109 {&handle_start, NULL, GNUNET_MESSAGE_TYPE_DV_START, 0},
2114 * Free a DistantNeighbor node, including removing it
2115 * from the referer's list.
2118 distant_neighbor_free (struct DistantNeighbor *referee)
2120 struct DirectNeighbor *referrer;
2122 referrer = referee->referrer;
2123 if (referrer != NULL)
2125 GNUNET_CONTAINER_DLL_remove (referrer->referee_head, referrer->referee_tail,
2128 GNUNET_CONTAINER_heap_remove_node (referee->max_loc);
2129 GNUNET_CONTAINER_heap_remove_node (referee->min_loc);
2130 GNUNET_CONTAINER_multihashmap_remove_all (extended_neighbors,
2131 &referee->identity.hashPubKey);
2132 GNUNET_free_non_null (referee->pkey);
2133 GNUNET_free (referee);
2137 * Free a DirectNeighbor node, including removing it
2138 * from the referer's list.
2141 direct_neighbor_free (struct DirectNeighbor *direct)
2143 struct NeighborSendContext *send_context;
2144 struct FastGossipNeighborList *about_list;
2145 struct FastGossipNeighborList *prev_about;
2147 send_context = direct->send_context;
2149 if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
2150 GNUNET_SCHEDULER_cancel (send_context->task);
2152 about_list = send_context->fast_gossip_list_head;
2153 while (about_list != NULL)
2155 GNUNET_CONTAINER_DLL_remove (send_context->fast_gossip_list_head,
2156 send_context->fast_gossip_list_tail,
2158 prev_about = about_list;
2159 about_list = about_list->next;
2160 GNUNET_free (prev_about);
2162 GNUNET_free (send_context);
2163 GNUNET_free (direct);
2167 * Multihashmap iterator for sending out disconnect messages
2170 * @param cls the peer that was disconnected
2171 * @param key key value stored under
2172 * @param value the direct neighbor to send disconnect to
2174 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2177 schedule_disconnect_messages (void *cls, const GNUNET_HashCode * key,
2180 struct DisconnectContext *disconnect_context = cls;
2181 struct DirectNeighbor *disconnected = disconnect_context->direct;
2182 struct DirectNeighbor *notify = value;
2183 struct PendingMessage *pending_message;
2184 p2p_dv_MESSAGE_Disconnect *disconnect_message;
2187 (¬ify->identity, &disconnected->identity,
2188 sizeof (struct GNUNET_PeerIdentity)) == 0)
2189 return GNUNET_YES; /* Don't send disconnect message to peer that disconnected! */
2192 GNUNET_malloc (sizeof (struct PendingMessage) +
2193 sizeof (p2p_dv_MESSAGE_Disconnect));
2194 pending_message->msg = (struct GNUNET_MessageHeader *) &pending_message[1];
2195 pending_message->importance = default_dv_priority;
2196 pending_message->timeout = GNUNET_TIME_relative_get_forever ();
2197 memcpy (&pending_message->recipient, ¬ify->identity,
2198 sizeof (struct GNUNET_PeerIdentity));
2199 pending_message->msg_size = sizeof (p2p_dv_MESSAGE_Disconnect);
2200 disconnect_message = (p2p_dv_MESSAGE_Disconnect *) pending_message->msg;
2201 disconnect_message->header.size = htons (sizeof (p2p_dv_MESSAGE_Disconnect));
2202 disconnect_message->header.type = htons (GNUNET_MESSAGE_TYPE_DV_DISCONNECT);
2203 disconnect_message->peer_id = htonl (disconnect_context->distant->our_id);
2205 GNUNET_CONTAINER_DLL_insert_after (core_pending_head, core_pending_tail,
2206 core_pending_tail, pending_message);
2208 GNUNET_SCHEDULER_add_now (try_core_send, NULL);
2209 /*if (core_transmit_handle == NULL)
2210 * core_transmit_handle = GNUNET_CORE_notify_transmit_ready(coreAPI, GNUNET_YES, default_dv_priority, GNUNET_TIME_relative_get_forever(), ¬ify->identity, sizeof(p2p_dv_MESSAGE_Disconnect), &core_transmit_notify, NULL); */
2216 * Multihashmap iterator for freeing extended neighbors.
2219 * @param key key value stored under
2220 * @param value the distant neighbor to be freed
2222 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2225 free_extended_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
2227 struct DistantNeighbor *distant = value;
2229 distant_neighbor_free (distant);
2234 * Multihashmap iterator for freeing direct neighbors.
2237 * @param key key value stored under
2238 * @param value the direct neighbor to be freed
2240 * @return GNUNET_YES to continue iteration, GNUNET_NO to stop
2243 free_direct_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
2245 struct DirectNeighbor *direct = value;
2247 direct_neighbor_free (direct);
2253 * Task run during shutdown.
2259 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "calling CORE_DISCONNECT\n");
2263 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &print_neighbors,
2266 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors,
2267 &free_extended_neighbors, NULL);
2268 GNUNET_CONTAINER_multihashmap_destroy (extended_neighbors);
2269 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors,
2270 &free_direct_neighbors, NULL);
2271 GNUNET_CONTAINER_multihashmap_destroy (direct_neighbors);
2273 GNUNET_CONTAINER_heap_destroy (neighbor_max_heap);
2274 GNUNET_CONTAINER_heap_destroy (neighbor_min_heap);
2276 GNUNET_CORE_disconnect (coreAPI);
2278 GNUNET_PEERINFO_disconnect (peerinfo_handle);
2279 GNUNET_SERVER_mst_destroy (coreMST);
2280 GNUNET_free_non_null (my_short_id);
2282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CORE_DISCONNECT completed\n");
2287 * To be called on core init/fail.
2290 core_init (void *cls, struct GNUNET_CORE_Handle *server,
2291 const struct GNUNET_PeerIdentity *identity,
2292 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
2297 GNUNET_SCHEDULER_cancel (cleanup_task);
2298 GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
2302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2303 "%s: Core connection initialized, I am peer: %s\n", "dv",
2304 GNUNET_i2s (identity));
2306 memcpy (&my_identity, identity, sizeof (struct GNUNET_PeerIdentity));
2307 my_short_id = GNUNET_strdup (GNUNET_i2s (&my_identity));
2312 #if PKEY_NO_NEIGHBOR_ON_ADD
2314 * Iterator over hash map entries.
2316 * @param cls closure
2317 * @param key current key code
2318 * @param value value in the hash map
2319 * @return GNUNET_YES if we should continue to
2324 add_pkey_to_extended (void *cls, const GNUNET_HashCode * key, void *abs_value)
2326 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey = cls;
2327 struct DistantNeighbor *distant_neighbor = abs_value;
2329 if (distant_neighbor->pkey == NULL)
2331 distant_neighbor->pkey =
2332 GNUNET_malloc (sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2333 memcpy (distant_neighbor->pkey, pkey,
2334 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2342 * Iterator over hash map entries.
2344 * @param cls closure
2345 * @param key current key code
2346 * @param value value in the hash map
2347 * @return GNUNET_YES if we should continue to
2352 update_matching_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
2354 struct NeighborUpdateInfo *update_info = cls;
2355 struct DistantNeighbor *distant_neighbor = value;
2357 if (update_info->referrer == distant_neighbor->referrer) /* Direct neighbor matches, update it's info and return GNUNET_NO */
2359 /* same referrer, cost change! */
2360 GNUNET_CONTAINER_heap_update_cost (neighbor_max_heap,
2361 update_info->neighbor->max_loc,
2363 GNUNET_CONTAINER_heap_update_cost (neighbor_min_heap,
2364 update_info->neighbor->min_loc,
2366 update_info->neighbor->last_activity = update_info->now;
2367 update_info->neighbor->cost = update_info->cost;
2368 update_info->neighbor->referrer_id = update_info->referrer_peer_id;
2377 * Iterate over all current direct peers, add DISTANT newly connected
2378 * peer to the fast gossip list for that peer so we get DV routing
2379 * information out as fast as possible!
2381 * @param cls the newly connected neighbor we will gossip about
2382 * @param key the hashcode of the peer
2383 * @param value the direct neighbor we should gossip to
2385 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2388 add_distant_all_direct_neighbors (void *cls, const GNUNET_HashCode * key,
2391 struct DirectNeighbor *direct = (struct DirectNeighbor *) value;
2392 struct DistantNeighbor *distant = (struct DistantNeighbor *) cls;
2393 struct NeighborSendContext *send_context = direct->send_context;
2394 struct FastGossipNeighborList *gossip_entry;
2401 if (distant == NULL)
2407 (&direct->identity, &distant->identity,
2408 sizeof (struct GNUNET_PeerIdentity)) == 0)
2410 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2414 if (distant->hidden == GNUNET_YES)
2415 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2417 gossip_entry = GNUNET_malloc (sizeof (struct FastGossipNeighborList));
2418 gossip_entry->about = distant;
2420 GNUNET_CONTAINER_DLL_insert_after (send_context->fast_gossip_list_head,
2421 send_context->fast_gossip_list_tail,
2422 send_context->fast_gossip_list_tail,
2425 encPeerAbout = GNUNET_strdup (GNUNET_i2s (&distant->identity));
2426 encPeerTo = GNUNET_strdup (GNUNET_i2s (&direct->identity));
2428 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2429 "%s: Fast send info about peer %s id %u for directly connected peer %s\n",
2430 GNUNET_i2s (&my_identity), encPeerAbout, distant->our_id,
2432 GNUNET_free (encPeerAbout);
2433 GNUNET_free (encPeerTo);
2435 /*if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
2436 * GNUNET_SCHEDULER_cancel(send_context->task); */
2438 send_context->task =
2439 GNUNET_SCHEDULER_add_now (&neighbor_send_task, send_context);
2444 * Callback for hello address creation.
2446 * @param cls closure, a struct HelloContext
2447 * @param max maximum number of bytes that can be written to buf
2448 * @param buf where to write the address information
2450 * @return number of bytes written, 0 to signal the
2451 * end of the iteration.
2454 generate_hello_address (void *cls, size_t max, void *buf)
2456 struct HelloContext *hello_context = cls;
2462 if (hello_context->addresses_to_add == 0)
2465 /* Hello "address" will be concatenation of distant peer and direct peer identities */
2466 size = 2 * sizeof (struct GNUNET_PeerIdentity);
2467 GNUNET_assert (max >= size);
2469 addr_buffer = GNUNET_malloc (size);
2471 /* Copy the distant peer identity to buffer */
2472 memcpy (addr_buffer, &hello_context->distant_peer,
2473 sizeof (struct GNUNET_PeerIdentity));
2474 offset += sizeof (struct GNUNET_PeerIdentity);
2475 /* Copy the direct peer identity to buffer */
2476 memcpy (&addr_buffer[offset], hello_context->direct_peer,
2477 sizeof (struct GNUNET_PeerIdentity));
2479 GNUNET_HELLO_add_address ("dv",
2480 GNUNET_TIME_relative_to_absolute
2481 (GNUNET_TIME_UNIT_HOURS), addr_buffer, size,
2484 hello_context->addresses_to_add--;
2486 GNUNET_free (addr_buffer);
2492 * Handles when a peer is either added due to being newly connected
2493 * or having been gossiped about, also called when the cost for a neighbor
2494 * needs to be updated.
2496 * @param peer identity of the peer whose info is being added/updated
2497 * @param pkey public key of the peer whose info is being added/updated
2498 * @param referrer_peer_id id to use when sending to 'peer'
2499 * @param referrer if this is a gossiped peer, who did we hear it from?
2500 * @param cost the cost of communicating with this peer via 'referrer'
2502 * @return the added neighbor, the updated neighbor or NULL (neighbor
2505 static struct DistantNeighbor *
2506 addUpdateNeighbor (const struct GNUNET_PeerIdentity *peer,
2507 struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey,
2508 unsigned int referrer_peer_id,
2509 struct DirectNeighbor *referrer, unsigned int cost)
2511 struct DistantNeighbor *neighbor;
2512 struct DistantNeighbor *max;
2513 struct GNUNET_TIME_Absolute now;
2514 struct NeighborUpdateInfo *neighbor_update;
2515 struct HelloContext *hello_context;
2516 struct GNUNET_HELLO_Message *hello_msg;
2517 unsigned int our_id;
2522 #if DEBUG_DV_PEER_NUMBERS
2525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s Received sender id (%u)!\n",
2526 "DV SERVICE", referrer_peer_id);
2529 now = GNUNET_TIME_absolute_get ();
2531 GNUNET_CONTAINER_multihashmap_get (extended_neighbors, &peer->hashPubKey);
2532 neighbor_update = GNUNET_malloc (sizeof (struct NeighborUpdateInfo));
2533 neighbor_update->neighbor = neighbor;
2534 neighbor_update->cost = cost;
2535 neighbor_update->now = now;
2536 neighbor_update->referrer = referrer;
2537 neighbor_update->referrer_peer_id = referrer_peer_id;
2539 if (neighbor != NULL)
2542 memcpy (&our_id, &neighbor->identity, sizeof (unsigned int));
2544 our_id = neighbor->our_id;
2550 memcpy (&our_id, peer, sizeof (unsigned int));
2553 GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_STRONG,
2558 /* Either we do not know this peer, or we already do but via a different immediate peer */
2559 if ((neighbor == NULL) ||
2560 (GNUNET_CONTAINER_multihashmap_get_multiple
2561 (extended_neighbors, &peer->hashPubKey, &update_matching_neighbors,
2562 neighbor_update) != GNUNET_SYSERR))
2565 if ((neighbor != NULL) && (cost < neighbor->cost)) /* New cost is less than old, remove old */
2567 distant_neighbor_free (neighbor);
2569 else if (neighbor != NULL) /* Only allow one DV connection to each peer */
2575 if (cost > fisheye_depth)
2578 GNUNET_free (neighbor_update);
2582 #if DEBUG_DV_PEER_NUMBERS
2583 encAbout = GNUNET_strdup (GNUNET_i2s (peer));
2584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2585 "%s: %s Chose NEW id (%u) for peer %s!\n",
2586 GNUNET_i2s (&my_identity), "DV SERVICE", our_id, encAbout);
2587 GNUNET_free (encAbout);
2590 if (max_table_size <=
2591 GNUNET_CONTAINER_multihashmap_size (extended_neighbors))
2593 /* remove most expensive entry */
2594 max = GNUNET_CONTAINER_heap_peek (neighbor_max_heap);
2595 GNUNET_assert (max != NULL);
2596 if (cost > max->cost)
2598 /* new entry most expensive, don't create */
2599 GNUNET_free (neighbor_update);
2604 /* only free if this is not a direct connection;
2605 * we could theoretically have more direct
2606 * connections than DV entries allowed total! */
2607 distant_neighbor_free (max);
2611 neighbor = GNUNET_malloc (sizeof (struct DistantNeighbor));
2612 GNUNET_CONTAINER_DLL_insert (referrer->referee_head, referrer->referee_tail,
2615 GNUNET_CONTAINER_heap_insert (neighbor_max_heap, neighbor, cost);
2617 GNUNET_CONTAINER_heap_insert (neighbor_min_heap, neighbor, cost);
2618 neighbor->referrer = referrer;
2619 memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
2620 if (pkey != NULL) /* pkey will be null on direct neighbor addition */
2623 GNUNET_malloc (sizeof
2624 (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2625 memcpy (neighbor->pkey, pkey,
2626 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
2629 neighbor->pkey = pkey;
2631 neighbor->last_activity = now;
2632 neighbor->cost = cost;
2633 neighbor->referrer_id = referrer_peer_id;
2634 neighbor->our_id = our_id;
2637 DIRECT_NEIGHBOR_COST)
2638 ? (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK, 4) ==
2641 GNUNET_CONTAINER_multihashmap_put (extended_neighbors, &peer->hashPubKey,
2643 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2644 if (referrer_peer_id != 0)
2646 for (i = 0; i < MAX_OUTSTANDING_MESSAGES; i++)
2648 if (referrer->pending_messages[i].sender_id == referrer_peer_id) /* We have a queued message from just learned about peer! */
2650 #if DEBUG_DV_MESSAGES
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2652 "%s: learned about peer %llu from which we have a previous unknown message, processing!\n",
2653 my_short_id, referrer_peer_id);
2655 struct GNUNET_TRANSPORT_ATS_Information atsi[3];
2657 atsi[0].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DISTANCE);
2658 atsi[0].value = htonl (referrer->pending_messages[i].distance);
2659 atsi[1].type = htonl (GNUNET_TRANSPORT_ATS_QUALITY_NET_DELAY);
2661 htonl ((uint32_t) referrer->pending_messages[i].latency.
2663 atsi[2].type = htonl (GNUNET_TRANSPORT_ATS_ARRAY_TERMINATOR);
2664 atsi[2].value = htonl (0);
2665 handle_dv_data_message (NULL, &referrer->pending_messages[i].sender,
2666 referrer->pending_messages[i].message,
2667 (const struct GNUNET_TRANSPORT_ATS_Information
2669 GNUNET_free (referrer->pending_messages[i].message);
2670 referrer->pending_messages[i].sender_id = 0;
2674 if ((cost != DIRECT_NEIGHBOR_COST) && (neighbor->pkey != NULL))
2676 /* Added neighbor, now send HELLO to transport */
2677 hello_context = GNUNET_malloc (sizeof (struct HelloContext));
2678 hello_context->direct_peer = &referrer->identity;
2679 memcpy (&hello_context->distant_peer, peer,
2680 sizeof (struct GNUNET_PeerIdentity));
2681 hello_context->addresses_to_add = 1;
2683 GNUNET_HELLO_create (pkey, &generate_hello_address, hello_context);
2684 GNUNET_assert (memcmp
2685 (hello_context->direct_peer, &hello_context->distant_peer,
2686 sizeof (struct GNUNET_PeerIdentity)) != 0);
2687 addr1 = GNUNET_strdup (GNUNET_i2s (hello_context->direct_peer));
2688 addr2 = GNUNET_strdup (GNUNET_i2s (&hello_context->distant_peer));
2690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2691 "%s: GIVING HELLO size %d for %s via %s to TRANSPORT\n",
2692 my_short_id, GNUNET_HELLO_size (hello_msg), addr2, addr1);
2694 GNUNET_free (addr1);
2695 GNUNET_free (addr2);
2696 send_to_plugin (hello_context->direct_peer,
2697 GNUNET_HELLO_get_header (hello_msg),
2698 GNUNET_HELLO_size (hello_msg),
2699 &hello_context->distant_peer, cost);
2700 GNUNET_free (hello_context);
2701 GNUNET_free (hello_msg);
2708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2709 "%s: Already know peer %s distance %d, referrer id %d!\n", "dv",
2710 GNUNET_i2s (peer), cost, referrer_peer_id);
2714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s: Size of extended_neighbors is %d\n",
2715 "dv", GNUNET_CONTAINER_multihashmap_size (extended_neighbors));
2718 GNUNET_free (neighbor_update);
2724 * Core handler for dv disconnect messages. These will be used
2725 * by us to tell transport via the dv plugin that a peer can
2726 * no longer be contacted by us via a certain address. We should
2727 * then propagate these messages on, given that the distance to
2728 * the peer indicates we would have gossiped about it to others.
2730 * @param cls closure
2731 * @param peer peer which sent the message (immediate sender)
2732 * @param message the message
2733 * @param atsi performance data
2736 handle_dv_disconnect_message (void *cls, const struct GNUNET_PeerIdentity *peer,
2737 const struct GNUNET_MessageHeader *message,
2738 const struct GNUNET_TRANSPORT_ATS_Information
2741 struct DirectNeighbor *referrer;
2742 struct DistantNeighbor *distant;
2743 p2p_dv_MESSAGE_Disconnect *enc_message =
2744 (p2p_dv_MESSAGE_Disconnect *) message;
2746 if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_Disconnect))
2748 return GNUNET_SYSERR; /* invalid message */
2752 GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
2753 if (referrer == NULL)
2756 distant = referrer->referee_head;
2757 while (distant != NULL)
2759 if (distant->referrer_id == ntohl (enc_message->peer_id))
2761 distant_neighbor_free (distant);
2762 distant = referrer->referee_head;
2765 distant = distant->next;
2773 * Core handler for dv gossip messages. These will be used
2774 * by us to create a HELLO message for the newly peer containing
2775 * which direct peer we can connect through, and what the cost
2776 * is. This HELLO will then be scheduled for validation by the
2777 * transport service so that it can be used by all others.
2779 * @param cls closure
2780 * @param peer peer which sent the message (immediate sender)
2781 * @param message the message
2782 * @param atsi performance data
2785 handle_dv_gossip_message (void *cls, const struct GNUNET_PeerIdentity *peer,
2786 const struct GNUNET_MessageHeader *message,
2787 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2789 struct DirectNeighbor *referrer;
2790 p2p_dv_MESSAGE_NeighborInfo *enc_message =
2791 (p2p_dv_MESSAGE_NeighborInfo *) message;
2793 if (ntohs (message->size) < sizeof (p2p_dv_MESSAGE_NeighborInfo))
2795 return GNUNET_SYSERR; /* invalid message */
2798 #if DEBUG_DV_GOSSIP_RECEIPT
2802 encPeerAbout = GNUNET_strdup (GNUNET_i2s (&enc_message->neighbor));
2803 encPeerFrom = GNUNET_strdup (GNUNET_i2s (peer));
2804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2805 "%s: Received %s message from peer %s about peer %s id %u distance %d!\n",
2806 GNUNET_i2s (&my_identity), "DV GOSSIP", encPeerFrom, encPeerAbout,
2807 ntohl (enc_message->neighbor_id), ntohl (enc_message->cost) + 1);
2808 GNUNET_free (encPeerAbout);
2809 GNUNET_free (encPeerFrom);
2813 GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
2814 if (referrer == NULL)
2817 addUpdateNeighbor (&enc_message->neighbor, &enc_message->pkey,
2818 ntohl (enc_message->neighbor_id), referrer,
2819 ntohl (enc_message->cost) + 1);
2826 * Iterate over all currently known peers, add them to the
2827 * fast gossip list for this peer so we get DV routing information
2828 * out as fast as possible!
2830 * @param cls the direct neighbor we will gossip to
2831 * @param key the hashcode of the peer
2832 * @param value the distant neighbor we should add to the list
2834 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2837 add_all_extended_peers (void *cls, const GNUNET_HashCode * key, void *value)
2839 struct NeighborSendContext *send_context = (struct NeighborSendContext *) cls;
2840 struct DistantNeighbor *distant = (struct DistantNeighbor *) value;
2841 struct FastGossipNeighborList *gossip_entry;
2844 (&send_context->toNeighbor->identity, &distant->identity,
2845 sizeof (struct GNUNET_PeerIdentity)) == 0)
2846 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2849 if (distant->hidden == GNUNET_YES)
2850 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2852 gossip_entry = GNUNET_malloc (sizeof (struct FastGossipNeighborList));
2853 gossip_entry->about = distant;
2855 GNUNET_CONTAINER_DLL_insert_after (send_context->fast_gossip_list_head,
2856 send_context->fast_gossip_list_tail,
2857 send_context->fast_gossip_list_tail,
2865 * Iterator over hash map entries.
2867 * @param cls closure
2868 * @param key current key code
2869 * @param value value in the hash map
2870 * @return GNUNET_YES if we should continue to
2875 gossip_all_to_all_iterator (void *cls, const GNUNET_HashCode * key,
2878 struct DirectNeighbor *direct = abs_value;
2880 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors,
2881 &add_all_extended_peers,
2882 direct->send_context);
2884 if (direct->send_context->task != GNUNET_SCHEDULER_NO_TASK)
2885 GNUNET_SCHEDULER_cancel (direct->send_context->task);
2887 direct->send_context->task =
2888 GNUNET_SCHEDULER_add_now (&neighbor_send_task, direct->send_context);
2893 * Task run during shutdown.
2899 gossip_all_to_all (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2901 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors,
2902 &gossip_all_to_all_iterator, NULL);
2904 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2905 (GNUNET_TIME_UNIT_SECONDS, 5),
2906 &gossip_all_to_all, NULL);
2911 * Iterate over all current direct peers, add newly connected peer
2912 * to the fast gossip list for that peer so we get DV routing
2913 * information out as fast as possible!
2915 * @param cls the newly connected neighbor we will gossip about
2916 * @param key the hashcode of the peer
2917 * @param value the direct neighbor we should gossip to
2919 * @return GNUNET_YES to continue iteration, GNUNET_NO otherwise
2922 add_all_direct_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
2924 struct DirectNeighbor *direct = (struct DirectNeighbor *) value;
2925 struct DirectNeighbor *to = (struct DirectNeighbor *) cls;
2926 struct DistantNeighbor *distant;
2927 struct NeighborSendContext *send_context = direct->send_context;
2928 struct FastGossipNeighborList *gossip_entry;
2933 GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
2934 &to->identity.hashPubKey);
2935 if (distant == NULL)
2941 (&direct->identity, &to->identity,
2942 sizeof (struct GNUNET_PeerIdentity)) == 0)
2944 return GNUNET_YES; /* Don't gossip to a peer about itself! */
2948 if (distant->hidden == GNUNET_YES)
2949 return GNUNET_YES; /* This peer should not be gossipped about (hidden) */
2951 direct_id = GNUNET_strdup (GNUNET_i2s (&direct->identity));
2953 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2954 "%s: adding peer %s to fast send list for %s\n", my_short_id,
2955 GNUNET_i2s (&distant->identity), direct_id);
2957 GNUNET_free (direct_id);
2958 gossip_entry = GNUNET_malloc (sizeof (struct FastGossipNeighborList));
2959 gossip_entry->about = distant;
2961 GNUNET_CONTAINER_DLL_insert_after (send_context->fast_gossip_list_head,
2962 send_context->fast_gossip_list_tail,
2963 send_context->fast_gossip_list_tail,
2965 if (send_context->task != GNUNET_SCHEDULER_NO_TASK)
2966 GNUNET_SCHEDULER_cancel (send_context->task);
2968 send_context->task =
2969 GNUNET_SCHEDULER_add_now (&neighbor_send_task, send_context);
2970 //tc.reason = GNUNET_SCHEDULER_REASON_TIMEOUT;
2971 //neighbor_send_task(send_context, &tc);
2976 * Type of an iterator over the hosts. Note that each
2977 * host will be called with each available protocol.
2979 * @param cls closure
2980 * @param peer id of the peer, NULL for last call
2981 * @param hello hello message for the peer (can be NULL)
2982 * @param err_msg NULL if successful, otherwise contains error message
2985 process_peerinfo (void *cls, const struct GNUNET_PeerIdentity *peer,
2986 const struct GNUNET_HELLO_Message *hello, const char *err_msg)
2988 struct PeerIteratorContext *peerinfo_iterator = cls;
2989 struct DirectNeighbor *neighbor = peerinfo_iterator->neighbor;
2990 struct DistantNeighbor *distant = peerinfo_iterator->distant;
2992 #if DEBUG_DV_PEER_NUMBERS
2997 if (err_msg != NULL)
2999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3000 _("Error in communication with PEERINFO service\n"));
3005 if (distant->pkey == NULL)
3008 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3009 "Failed to get peerinfo information for this peer, retrying!\n");
3011 peerinfo_iterator->ic =
3012 GNUNET_PEERINFO_iterate (peerinfo_handle,
3013 &peerinfo_iterator->neighbor->identity,
3014 GNUNET_TIME_relative_multiply
3015 (GNUNET_TIME_UNIT_SECONDS, 3),
3016 &process_peerinfo, peerinfo_iterator);
3020 GNUNET_free (peerinfo_iterator);
3026 (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity) != 0))
3029 if ((hello != NULL) &&
3030 (GNUNET_HELLO_get_key (hello, &neighbor->pkey) == GNUNET_OK))
3032 if (distant->pkey == NULL)
3035 GNUNET_malloc (sizeof
3036 (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3037 memcpy (distant->pkey, &neighbor->pkey,
3038 sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
3042 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors,
3043 &add_all_extended_peers,
3044 neighbor->send_context);
3047 GNUNET_STATISTICS_update (stats,
3048 "# distant peers gossiped to direct neighbors",
3051 #if DEBUG_DV_PEER_NUMBERS
3052 neighbor_pid = GNUNET_strdup (GNUNET_i2s (&neighbor->identity));
3053 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3054 "%s: Gossipped %d extended peers to %s\n",
3055 GNUNET_i2s (&my_identity), sent, neighbor_pid);
3058 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors,
3059 &add_all_direct_neighbors,
3063 GNUNET_STATISTICS_update (stats,
3064 "# direct peers gossiped to direct neighbors",
3067 #if DEBUG_DV_PEER_NUMBERS
3068 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3069 "%s: Gossipped about %s to %d direct peers\n",
3070 GNUNET_i2s (&my_identity), neighbor_pid, sent);
3071 GNUNET_free (neighbor_pid);
3073 neighbor->send_context->task =
3074 GNUNET_SCHEDULER_add_now (&neighbor_send_task, neighbor->send_context);
3080 * Method called whenever a peer connects.
3082 * @param cls closure
3083 * @param peer peer identity this notification is about
3084 * @param atsi performance data
3087 handle_core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3088 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3090 struct DirectNeighbor *neighbor;
3091 struct DistantNeighbor *about;
3092 struct PeerIteratorContext *peerinfo_iterator;
3097 /* Check for connect to self message */
3098 if (0 == memcmp (&my_identity, peer, sizeof (struct GNUNET_PeerIdentity)))
3101 distance = get_atsi_distance (atsi);
3102 if ((distance == DIRECT_NEIGHBOR_COST) &&
3103 (GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey)
3106 peerinfo_iterator = GNUNET_malloc (sizeof (struct PeerIteratorContext));
3107 neighbor = GNUNET_malloc (sizeof (struct DirectNeighbor));
3108 neighbor->send_context =
3109 GNUNET_malloc (sizeof (struct NeighborSendContext));
3110 neighbor->send_context->toNeighbor = neighbor;
3111 memcpy (&neighbor->identity, peer, sizeof (struct GNUNET_PeerIdentity));
3113 GNUNET_assert (GNUNET_SYSERR !=
3114 GNUNET_CONTAINER_multihashmap_put (direct_neighbors,
3117 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
3118 about = addUpdateNeighbor (peer, NULL, 0, neighbor, DIRECT_NEIGHBOR_COST);
3119 peerinfo_iterator->distant = about;
3120 peerinfo_iterator->neighbor = neighbor;
3121 peerinfo_iterator->ic =
3122 GNUNET_PEERINFO_iterate (peerinfo_handle, peer,
3123 GNUNET_TIME_relative_multiply
3124 (GNUNET_TIME_UNIT_SECONDS, 3),
3125 &process_peerinfo, peerinfo_iterator);
3127 if ((about != NULL) && (about->pkey == NULL))
3130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3131 "Newly added peer %s has NULL pkey!\n", GNUNET_i2s (peer));
3134 else if (about != NULL)
3136 GNUNET_free (peerinfo_iterator);
3142 GNUNET_CONTAINER_multihashmap_get (extended_neighbors,
3144 if ((GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey)
3145 == NULL) && (about != NULL))
3148 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors,
3149 &add_distant_all_direct_neighbors,
3152 GNUNET_STATISTICS_update (stats,
3153 "# direct peers gossiped to new direct neighbors",
3157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3158 "%s: Distance (%d) greater than %d or already know about peer (%s), not re-adding!\n",
3159 "dv", distance, DIRECT_NEIGHBOR_COST, GNUNET_i2s (peer));
3166 * Method called whenever a given peer disconnects.
3168 * @param cls closure
3169 * @param peer peer identity this notification is about
3172 handle_core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3174 struct DirectNeighbor *neighbor;
3175 struct DistantNeighbor *referee;
3176 struct FindDestinationContext fdc;
3177 struct DisconnectContext disconnect_context;
3178 struct PendingMessage *pending_pos;
3181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3182 "%s: Receives core peer disconnect message!\n", "dv");
3185 /* Check for disconnect from self message */
3186 if (0 == memcmp (&my_identity, peer, sizeof (struct GNUNET_PeerIdentity)))
3190 GNUNET_CONTAINER_multihashmap_get (direct_neighbors, &peer->hashPubKey);
3192 if (neighbor == NULL)
3197 pending_pos = core_pending_head;
3198 while (NULL != pending_pos)
3201 memcmp (&pending_pos->recipient, &neighbor->identity,
3202 sizeof (struct GNUNET_PeerIdentity)))
3204 GNUNET_CONTAINER_DLL_remove (core_pending_head, core_pending_tail,
3206 pending_pos = core_pending_head;
3209 pending_pos = pending_pos->next;
3212 while (NULL != (referee = neighbor->referee_head))
3213 distant_neighbor_free (referee);
3218 GNUNET_CONTAINER_multihashmap_iterate (extended_neighbors, &find_distant_peer,
3221 if (fdc.dest != NULL)
3223 disconnect_context.direct = neighbor;
3224 disconnect_context.distant = fdc.dest;
3225 GNUNET_CONTAINER_multihashmap_iterate (direct_neighbors,
3226 &schedule_disconnect_messages,
3227 &disconnect_context);
3230 GNUNET_assert (neighbor->referee_tail == NULL);
3232 GNUNET_CONTAINER_multihashmap_remove (direct_neighbors, &peer->hashPubKey,
3237 if ((neighbor->send_context != NULL) &&
3238 (neighbor->send_context->task != GNUNET_SCHEDULER_NO_TASK))
3239 GNUNET_SCHEDULER_cancel (neighbor->send_context->task);
3240 GNUNET_free (neighbor);
3245 * Process dv requests.
3247 * @param cls closure
3248 * @param server the initialized server
3249 * @param c configuration to use
3252 run (void *cls, struct GNUNET_SERVER_Handle *server,
3253 const struct GNUNET_CONFIGURATION_Handle *c)
3255 unsigned long long max_hosts;
3259 /* FIXME: Read from config, or calculate, or something other than this! */
3260 max_hosts = DEFAULT_DIRECT_CONNECTIONS;
3261 max_table_size = DEFAULT_DV_SIZE;
3262 fisheye_depth = DEFAULT_FISHEYE_DEPTH;
3264 if (GNUNET_CONFIGURATION_have_value (cfg, "dv", "max_direct_connections"))
3265 GNUNET_assert (GNUNET_OK ==
3266 GNUNET_CONFIGURATION_get_value_number (cfg, "dv",
3267 "max_direct_connections",
3270 if (GNUNET_CONFIGURATION_have_value (cfg, "dv", "max_total_connections"))
3271 GNUNET_assert (GNUNET_OK ==
3272 GNUNET_CONFIGURATION_get_value_number (cfg, "dv",
3273 "max_total_connections",
3277 if (GNUNET_CONFIGURATION_have_value (cfg, "dv", "fisheye_depth"))
3278 GNUNET_assert (GNUNET_OK ==
3279 GNUNET_CONFIGURATION_get_value_number (cfg, "dv",
3284 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MIN);
3286 GNUNET_CONTAINER_heap_create (GNUNET_CONTAINER_HEAP_ORDER_MAX);
3288 direct_neighbors = GNUNET_CONTAINER_multihashmap_create (max_hosts);
3289 extended_neighbors =
3290 GNUNET_CONTAINER_multihashmap_create (max_table_size * 3);
3292 GNUNET_SERVER_add_handlers (server, plugin_handlers);
3293 coreAPI = GNUNET_CORE_connect (cfg, 1, NULL, /* FIXME: anything we want to pass around? */
3294 &core_init, &handle_core_connect,
3295 &handle_core_disconnect, NULL, NULL, GNUNET_NO,
3296 NULL, GNUNET_NO, core_handlers);
3298 if (coreAPI == NULL)
3301 coreMST = GNUNET_SERVER_mst_create (&tokenized_message_handler, NULL);
3303 peerinfo_handle = GNUNET_PEERINFO_connect (cfg);
3305 if (peerinfo_handle == NULL)
3307 GNUNET_CORE_disconnect (coreAPI);
3311 /* Scheduled the task to clean up when shutdown is called */
3313 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
3314 &shutdown_task, NULL);
3319 * The main function for the dv service.
3321 * @param argc number of arguments from the command line
3322 * @param argv command line arguments
3323 * @return 0 ok, 1 on error
3326 main (int argc, char *const *argv)
3328 return (GNUNET_OK ==
3329 GNUNET_SERVICE_run (argc, argv, "dv", GNUNET_SERVICE_OPTION_NONE,
3330 &run, NULL)) ? 0 : 1;