2 This file is part of GNUnet.
3 (C) 2001 - 2011 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 mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - relay corking down to core
48 #include "mesh_protocol.h"
49 #include "gnunet_dht_service.h"
50 #include "mesh_tunnel_tree.h"
52 /* TODO: move into configuration file */
53 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
54 GNUNET_TIME_UNIT_SECONDS,\
56 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
57 GNUNET_TIME_UNIT_SECONDS,\
60 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
61 GNUNET_TIME_UNIT_SECONDS,\
64 #define GET_RESTART_TIME GNUNET_TIME_relative_multiply(\
65 GNUNET_TIME_UNIT_SECONDS,\
68 #define UNACKNOWLEDGED_WAIT GNUNET_TIME_relative_multiply(\
69 GNUNET_TIME_UNIT_SECONDS,\
72 #define MESH_DEBUG_DHT GNUNET_NO
74 /******************************************************************************/
75 /************************ DATA STRUCTURES ****************************/
76 /******************************************************************************/
78 /** FWD declaration */
82 * Struct containing all info possibly needed to build a package when called
85 struct MeshDataDescriptor
87 /** ID of the tunnel this packet travels in */
88 struct MESH_TunnelID *origin;
93 /** Client that asked for the transmission, if any */
94 struct GNUNET_SERVER_Client *client;
96 /** Who was this message being sent to */
97 struct MeshPeerInfo *peer;
99 /** Ultimate destination of the packet */
100 GNUNET_PEER_Id destination;
102 /** Number of identical messages sent to different hops (multicast) */
103 unsigned int *copies;
105 /** Which handler was used to request the transmission */
106 unsigned int handler_n;
108 /** Size of the data */
111 /** Used to allow a client send more traffic to the service after a
112 * previous packet was tried to be sent to a neighbor and couldn't */
113 GNUNET_SCHEDULER_TaskIdentifier *timeout_task;
118 * Struct containing all information regarding a given peer
128 * Last time we heard from this peer
130 struct GNUNET_TIME_Absolute last_contact;
133 * Number of attempts to reconnect so far
135 int n_reconnect_attempts;
138 * Paths to reach the peer, ordered by ascending hop count
140 struct MeshPeerPath *path_head;
143 * Paths to reach the peer, ordered by ascending hop count
145 struct MeshPeerPath *path_tail;
148 * Handle to stop the DHT search for a path to this peer
150 struct GNUNET_DHT_GetHandle *dhtget;
153 * Closure given to the DHT GET
155 struct MeshPathInfo *dhtgetcls;
158 * Handles to stop queued transmissions for this peer
160 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
163 * Pointer to info stuctures used as cls for queued transmissions
165 void *infos[CORE_QUEUE_SIZE];
168 * Type of message being in each transmission
170 uint16_t types[CORE_QUEUE_SIZE];
173 * Array of tunnels this peer participates in
174 * (most probably a small amount, therefore not a hashmap)
175 * When the path to the peer changes, notify these tunnels to let them
176 * re-adjust their path trees.
178 struct MeshTunnel **tunnels;
181 * Number of tunnels this peers participates in
183 unsigned int ntunnels;
188 * Data scheduled to transmit (to local client or remote peer)
195 struct MeshQueue *next;
196 struct MeshQueue *prev;
199 * Target of the data (NULL if target is client)
201 struct MeshPeerInfo *peer;
204 * Client to send the data to (NULL if target is peer)
206 struct MeshClient *client;
209 * Size of the message to transmit
214 * How old is the data?
216 struct GNUNET_TIME_Absolute timestamp;
221 struct GNUNET_MessageHeader *data;
225 * Globally unique tunnel identification (owner + number)
226 * DO NOT USE OVER THE NETWORK
231 * Node that owns the tunnel
236 * Tunnel number to differentiate all the tunnels owned by the node oid
237 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
239 MESH_TunnelNumber tid;
243 struct MeshClient; /* FWD declaration */
246 * Struct containing all information regarding a tunnel
247 * For an intermediate node the improtant info used will be:
248 * - id Tunnel unique identification
249 * - paths[0] To know where to send it next
250 * - metainfo: ready, speeds, accounting
257 struct MESH_TunnelID id;
260 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
262 MESH_TunnelNumber local_tid;
265 * Last time the tunnel was used
267 struct GNUNET_TIME_Absolute timestamp;
270 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
271 * containing peers added by id or by type, not intermediate peers.
273 struct GNUNET_CONTAINER_MultiHashMap *peers;
276 * Number of peers that are connected and potentially ready to receive data
278 unsigned int peers_ready;
281 * Number of peers that have been added to the tunnel
283 unsigned int peers_total;
286 * Client owner of the tunnel, if any
288 struct MeshClient *client;
291 * Messages ready to transmit
293 struct MeshQueue *queue_head;
294 struct MeshQueue *queue_tail;
299 struct MeshTunnelTree *tree;
302 * Application type we are looking for in this tunnel
304 GNUNET_MESH_ApplicationType type;
307 * Used to search peers offering a service
309 struct GNUNET_DHT_GetHandle *dht_get_type;
312 * Task to keep the used paths alive
314 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
317 * Task to destroy the tunnel after timeout
319 * FIXME: merge the two? a tunnel will have either
320 * a path refresh OR a timeout, never both!
322 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
327 * Info needed to work with tunnel paths and peers
334 struct MeshTunnel *t;
337 * Neighbouring peer to whom we send the packet to
339 struct MeshPeerInfo *peer;
344 struct MeshPeerPath *path;
347 * Position in peer's transmit queue
354 * Struct containing information about a client of the service
361 struct MeshClient *next;
362 struct MeshClient *prev;
365 * Tunnels that belong to this client, indexed by local id
367 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
370 * Handle to communicate with the client
372 struct GNUNET_SERVER_Client *handle;
375 * Applications that this client has claimed to provide
377 struct GNUNET_CONTAINER_MultiHashMap *apps;
380 * Messages that this client has declared interest in
382 struct GNUNET_CONTAINER_MultiHashMap *types;
386 * ID of the client, for debug messages
395 /******************************************************************************/
396 /************************ DEBUG FUNCTIONS ****************************/
397 /******************************************************************************/
401 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
402 * @param cls string to print
403 * @param tc task context
406 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
410 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
418 /******************************************************************************/
419 /*********************** GLOBAL VARIABLES ****************************/
420 /******************************************************************************/
425 static struct MeshClient *clients;
426 static struct MeshClient *clients_tail;
429 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
431 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
434 * Tunnels incoming, indexed by MESH_TunnelNumber
435 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
437 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
440 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
442 static struct GNUNET_CONTAINER_MultiHashMap *peers;
445 * Handle to communicate with core
447 static struct GNUNET_CORE_Handle *core_handle;
450 * Handle to communicate with transport
452 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
457 static struct GNUNET_DHT_Handle *dht_handle;
462 static struct GNUNET_SERVER_Handle *server_handle;
465 * Notification context, to send messages to local clients
467 static struct GNUNET_SERVER_NotificationContext *nc;
470 * Local peer own ID (memory efficient handle)
472 static GNUNET_PEER_Id myid;
475 * Local peer own ID (full value)
477 static struct GNUNET_PeerIdentity my_full_id;
482 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
487 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
490 * Tunnel ID for the next created tunnel (global tunnel number)
492 static MESH_TunnelNumber next_tid;
495 * Tunnel ID for the next incoming tunnel (local tunnel number)
497 static MESH_TunnelNumber next_local_tid;
500 * All application types provided by this peer
502 static struct GNUNET_CONTAINER_MultiHashMap *applications;
505 * All message types clients of this peer are interested in
507 static struct GNUNET_CONTAINER_MultiHashMap *types;
510 * Task to periodically announce provided applications
512 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
515 * Task to periodically announce itself in the network
517 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
520 unsigned int next_client_id;
524 /******************************************************************************/
525 /************************ ITERATORS ****************************/
526 /******************************************************************************/
528 /* FIXME move iterators here */
531 /******************************************************************************/
532 /************************ PERIODIC FUNCTIONS ****************************/
533 /******************************************************************************/
536 * Announce iterator over for each application provided by the peer
539 * @param key current key code
540 * @param value value in the hash map
541 * @return GNUNET_YES if we should continue to
546 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
548 /* FIXME are hashes in multihash map equal on all aquitectures? */
549 GNUNET_DHT_put (dht_handle,
552 GNUNET_DHT_RO_RECORD_ROUTE |
553 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
554 GNUNET_BLOCK_TYPE_TEST,
555 sizeof (struct GNUNET_PeerIdentity),
556 (const char *) &my_full_id,
558 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
559 &mesh_debug, "DHT_put for app completed");
561 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
563 APP_ANNOUNCE_TIME, NULL, NULL);
570 * Periodically announce what applications are provided by local clients
573 * @param tc task context
576 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
578 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
580 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
586 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
588 announce_applications_task =
589 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
599 * Periodically announce self id in the DHT
602 * @param tc task context
605 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
607 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
609 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
613 * - Set data expiration in function of X
617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
618 GNUNET_i2s (&my_full_id));
620 GNUNET_DHT_put (dht_handle, /* DHT handle */
621 &my_full_id.hashPubKey, /* Key to use */
622 10U, /* Replication level */
623 GNUNET_DHT_RO_RECORD_ROUTE |
624 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
625 GNUNET_BLOCK_TYPE_TEST, /* Block type */
626 sizeof(my_full_id), /* Size of the data */
627 (char *)&my_full_id, /* Data itself */
628 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
629 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
631 &mesh_debug, "DHT_put for id completed");
633 NULL, /* Continuation */
634 NULL); /* Continuation closure */
637 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
642 * Function to process paths received for a new peer addition. The recorded
643 * paths form the initial tunnel, which can be optimized later.
644 * Called on each result obtained for the DHT search.
647 * @param exp when will this value expire
648 * @param key key of the result
649 * @param type type of the result
650 * @param size number of bytes in data
651 * @param data pointer to the result data
654 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
655 const GNUNET_HashCode * key,
656 const struct GNUNET_PeerIdentity *get_path,
657 unsigned int get_path_length,
658 const struct GNUNET_PeerIdentity *put_path,
659 unsigned int put_path_length,
660 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
663 /******************************************************************************/
664 /****************** GENERAL HELPER FUNCTIONS ************************/
665 /******************************************************************************/
668 * Check if client has registered with the service and has not disconnected
670 * @param client the client to check
672 * @return non-NULL if client exists in the global DLL
674 static struct MeshClient *
675 client_get (struct GNUNET_SERVER_Client *client)
677 struct MeshClient *c;
682 if (c->handle == client)
691 * Checks if a given client has subscribed to certain message type
693 * @param message_type Type of message to check
694 * @param c Client to check
696 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
701 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
705 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
706 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
711 * Allow a client to send more data after transmitting a multicast message
712 * which some neighbor has not yet accepted altough a reasonable time has
715 * @param cls Closure (DataDescriptor containing the task identifier)
716 * @param tc Task Context
719 client_allow_send(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
721 struct MeshDataDescriptor *info = cls;
723 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
726 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
727 "MESH: CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
730 *(info->timeout_task) = GNUNET_SCHEDULER_NO_TASK;
731 GNUNET_SERVER_receive_done(info->client, GNUNET_OK);
736 * Search for a tunnel by global ID using full PeerIdentities
738 * @param oid owner of the tunnel
739 * @param tid global tunnel number
741 * @return tunnel handler, NULL if doesn't exist
743 static struct MeshTunnel *
744 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
748 * Notify a tunnel that a connection has broken that affects at least
751 * @param t Tunnel affected.
752 * @param p1 Peer that got disconnected from p2.
753 * @param p2 Peer that got disconnected from p1.
755 * @return Short ID of the peer disconnected (either p1 or p2).
756 * 0 if the tunnel remained unaffected.
758 static GNUNET_PEER_Id
759 tunnel_notify_connection_broken (struct MeshTunnel *t,
765 * Send the message to all clients that have subscribed to its type
767 * @param msg Pointer to the message itself
768 * @return number of clients this message was sent to
771 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
772 const struct GNUNET_MessageHeader *payload)
774 struct GNUNET_PeerIdentity *oid;
775 struct MeshClient *c;
776 struct MeshTunnel *t;
777 MESH_TunnelNumber *tid;
780 char cbuf[htons(msg->size)];
782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Sending to clients...\n");
783 type = ntohs (payload->type);
784 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message of type %u\n", type);
786 memcpy (cbuf, msg, sizeof(cbuf));
787 switch (htons(msg->type))
789 struct GNUNET_MESH_Unicast *uc;
790 struct GNUNET_MESH_Multicast *mc;
791 struct GNUNET_MESH_ToOrigin *to;
793 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
794 uc = (struct GNUNET_MESH_Unicast *) cbuf;
798 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
799 mc = (struct GNUNET_MESH_Multicast *) cbuf;
803 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
804 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
812 t = tunnel_get (oid, ntohl(*tid));
818 *tid = htonl (t->local_tid);
819 for (count = 0, c = clients; c != NULL; c = c->next)
821 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client %u\n", c->id);
822 if (client_is_subscribed (type, c))
825 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending\n");
826 GNUNET_SERVER_notification_context_unicast (
829 (struct GNUNET_MessageHeader *) cbuf,
838 * Notify the client that owns the tunnel that a peer has connected to it
839 * (the requested path to it has been confirmed).
841 * @param t Tunnel whose owner to notify
842 * @param id Short id of the peer that has connected
845 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
847 struct GNUNET_MESH_PeerControl pc;
849 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
850 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
851 pc.tunnel_id = htonl (t->local_tid);
852 GNUNET_PEER_resolve (id, &pc.peer);
853 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
854 &pc.header, GNUNET_NO);
859 * Notify all clients (not depending on registration status) that the incoming
860 * tunnel is no longer valid.
862 * @param t Tunnel that was destroyed.
865 send_clients_tunnel_destroy (struct MeshTunnel *t)
867 struct GNUNET_MESH_TunnelMessage msg;
869 msg.header.size = htons (sizeof (msg));
870 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
871 msg.tunnel_id = htonl (t->local_tid);
872 GNUNET_SERVER_notification_context_broadcast(nc, &msg.header, GNUNET_NO);
877 * Function called to notify a client about the socket
878 * being ready to queue more data. "buf" will be
879 * NULL and "size" zero if the socket was closed for
880 * writing in the meantime.
883 * @param size number of bytes available in buf
884 * @param buf where the callee should write the message
885 * @return number of bytes written to buf
888 send_core_create_path (void *cls, size_t size, void *buf);
892 * Function called to notify a client about the socket
893 * being ready to queue more data. "buf" will be
894 * NULL and "size" zero if the socket was closed for
895 * writing in the meantime.
897 * @param cls closure (data itself)
898 * @param size number of bytes available in buf
899 * @param buf where the callee should write the message
901 * @return number of bytes written to buf
904 send_core_data_multicast (void *cls, size_t size, void *buf);
908 * Decrements the reference counter and frees all resources if needed
910 * @param dd Data Descriptor used in a multicast message
913 data_descriptor_decrement_multicast (struct MeshDataDescriptor *dd)
915 if (0 == --(*(dd->copies)))
917 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
918 if (NULL != dd->client)
920 if (GNUNET_SCHEDULER_NO_TASK != *(dd->timeout_task))
922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
923 "MESH: cancelling client timeout (%u)...\n",
924 *(dd->timeout_task));
925 GNUNET_SCHEDULER_cancel(*(dd->timeout_task));
926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
927 GNUNET_SERVER_receive_done (dd->client, GNUNET_OK);
929 GNUNET_free (dd->timeout_task);
931 GNUNET_free (dd->copies);
932 GNUNET_free (dd->data);
938 * Cancel a core transmission that was already requested and free all resources
939 * associated to the request.
941 * @param peer PeeInfo of the peer whose transmission is cancelled.
942 * @param i Position of the transmission to be cancelled.
945 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
947 if (NULL != peer->core_transmit[i])
949 struct MeshDataDescriptor *dd;
950 struct MeshPathInfo *path_info;
954 struct GNUNET_PeerIdentity id;
956 GNUNET_PEER_resolve (peer->id, &id);
957 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
958 "MESH: Cancelling data transmission at %s [%u]\n",
961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
962 "MESH: message type %u\n",
966 /* TODO: notify that tranmission has failed */
967 switch (peer->types[i])
969 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
970 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
971 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
974 data_descriptor_decrement_multicast (dd);
976 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
978 path_info = peer->infos[i];
979 path_destroy(path_info->path);
983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
985 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
986 peer->core_transmit[i] = NULL;
987 GNUNET_free (peer->infos[i]);
993 * Get a unused CORE slot to transmit a message to a peer. If all the slots
994 * are used, cancel one and return it's position.
996 * @param peer PeerInfo of the neighbor we want to transmit to.
998 * @return The index of an available slot to transmit to the neighbor.
1001 peer_info_transmit_slot (struct MeshPeerInfo *peer)
1005 for (i = 0; peer->core_transmit[i]; i++)
1007 if (i == (CORE_QUEUE_SIZE - 1))
1009 /* All positions are taken! Overwriting! */
1011 peer_info_cancel_transmission(peer, 0);
1020 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1021 * and insert it in the appropiate structures if the peer is not known yet.
1023 * @param peer Full identity of the peer.
1025 * @return Existing or newly created peer info.
1027 static struct MeshPeerInfo *
1028 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1030 struct MeshPeerInfo *peer_info;
1032 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1033 if (NULL == peer_info)
1036 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1037 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1038 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1039 peer_info->id = GNUNET_PEER_intern (peer);
1047 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1048 * and insert it in the appropiate structures if the peer is not known yet.
1050 * @param peer Short identity of the peer.
1052 * @return Existing or newly created peer info.
1054 static struct MeshPeerInfo *
1055 peer_info_get_short (const GNUNET_PEER_Id peer)
1057 struct GNUNET_PeerIdentity id;
1059 GNUNET_PEER_resolve(peer, &id);
1060 return peer_info_get(&id);
1065 * Iterator to remove the tunnel from the list of tunnels a peer participates
1068 * @param cls Closure (tunnel info)
1069 * @param key GNUNET_PeerIdentity of the peer (unused)
1070 * @param value PeerInfo of the peer
1072 * @return always GNUNET_YES, to keep iterating
1075 peer_info_delete_tunnel (void* cls, const GNUNET_HashCode* key, void* value)
1077 struct MeshTunnel *t = cls;
1078 struct MeshPeerInfo *peer = value;
1081 for (i = 0; i < peer->ntunnels; i++)
1083 if (0 == memcmp(&peer->tunnels[i]->id,
1085 sizeof(struct MESH_TunnelID)))
1088 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1089 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1098 * Core callback to write a
1100 * @param cls Closure (MeshDataDescriptor with data in "data" member).
1101 * @param size Number of bytes available in buf.
1102 * @param buf Where the to write the message.
1104 * @return number of bytes written to buf
1107 send_core_data_raw (void *cls, size_t size, void *buf)
1109 struct MeshDataDescriptor *info = cls;
1110 struct GNUNET_MessageHeader *msg;
1113 GNUNET_assert (NULL != info);
1114 GNUNET_assert (NULL != info->data);
1115 msg = (struct GNUNET_MessageHeader *) info->data;
1116 total_size = ntohs (msg->size);
1118 if (total_size > size)
1120 struct GNUNET_PeerIdentity id;
1122 GNUNET_PEER_resolve (info->peer->id, &id);
1123 info->peer->core_transmit[info->handler_n] =
1124 GNUNET_CORE_notify_transmit_ready(core_handle,
1127 GNUNET_TIME_UNIT_FOREVER_REL,
1130 &send_core_data_raw,
1134 info->peer->core_transmit[info->handler_n] = NULL;
1135 memcpy (buf, msg, total_size);
1136 GNUNET_free (info->data);
1143 * Sends an already built message to a peer, properly registrating
1144 * all used resources.
1146 * @param message Message to send. Fucntion makes a copy of it.
1147 * @param peer Short ID of the neighbor whom to send the message.
1150 send_message (const struct GNUNET_MessageHeader *message,
1151 const struct GNUNET_PeerIdentity *peer)
1153 struct MeshDataDescriptor *info;
1154 struct MeshPeerInfo *neighbor;
1155 struct MeshPeerPath *p;
1159 // GNUNET_TRANSPORT_try_connect();
1161 size = ntohs (message->size);
1162 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1163 info->data = GNUNET_malloc (size);
1164 memcpy (info->data, message, size);
1165 neighbor = peer_info_get (peer);
1166 for (p = neighbor->path_head; NULL != p; p = p->next)
1178 i = peer_info_transmit_slot (neighbor);
1179 info->handler_n = i;
1180 info->peer = neighbor;
1181 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1182 neighbor->infos[i] = info;
1183 neighbor->core_transmit[i] =
1184 GNUNET_CORE_notify_transmit_ready(core_handle,
1187 GNUNET_TIME_UNIT_FOREVER_REL,
1190 &send_core_data_raw,
1197 * Sends a CREATE PATH message for a path to a peer, properly registrating
1198 * all used resources.
1200 * @param peer PeerInfo of the final peer for whom this path is being created.
1201 * @param p Path itself.
1202 * @param t Tunnel for which the path is created.
1205 send_create_path (struct MeshPeerInfo *peer,
1206 struct MeshPeerPath *p,
1207 struct MeshTunnel *t)
1209 struct GNUNET_PeerIdentity id;
1210 struct MeshPathInfo *path_info;
1211 struct MeshPeerInfo *neighbor;
1216 p = tree_get_path_to_peer(t->tree, peer->id);
1223 for (i = 0; i < p->length; i++)
1225 if (p->peers[i] == myid)
1228 if (i >= p->length - 1)
1234 GNUNET_PEER_resolve(p->peers[i + 1], &id);
1236 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1237 path_info->path = p;
1239 neighbor = peer_info_get(&id);
1240 path_info->peer = neighbor;
1241 path_info->pos = peer_info_transmit_slot(neighbor);
1242 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1243 neighbor->infos[path_info->pos] = path_info;
1244 neighbor->core_transmit[path_info->pos] =
1245 GNUNET_CORE_notify_transmit_ready (
1246 core_handle, /* handle */
1249 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1251 sizeof (struct GNUNET_MESH_ManipulatePath)
1252 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1253 &send_core_create_path, /* callback */
1254 path_info); /* cls */
1259 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1261 * @param t Tunnel whose path to destroy.
1262 * @param destination Short ID of the peer to whom the path to destroy.
1265 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1267 struct MeshPeerPath *p;
1270 p = tree_get_path_to_peer(t->tree, destination);
1276 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1277 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1279 struct GNUNET_MESH_ManipulatePath *msg;
1280 struct GNUNET_PeerIdentity *pi;
1284 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1285 msg->header.size = htons (size);
1286 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1287 msg->tid = htonl (t->id.tid);
1288 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1289 for (i = 0; i < p->length; i++)
1291 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1293 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1300 * Try to establish a new connection to this peer.
1301 * Use the best path for the given tunnel.
1302 * If the peer doesn't have any path to it yet, try to get one.
1303 * If the peer already has some path, send a CREATE PATH towards it.
1305 * @param peer PeerInfo of the peer.
1306 * @param t Tunnel for which to create the path, if possible.
1309 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1311 struct MeshPeerPath *p;
1312 struct MeshPathInfo *path_info;
1314 if (NULL != peer->path_head)
1316 p = tree_get_path_to_peer(t->tree, peer->id);
1325 send_create_path(peer, p, t);
1330 send_client_peer_connected(t, myid);
1333 else if (NULL == peer->dhtget)
1335 struct GNUNET_PeerIdentity id;
1337 GNUNET_PEER_resolve(peer->id, &id);
1338 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1339 path_info->peer = peer;
1341 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1342 "MESH: Starting DHT GET for peer %s\n",
1344 peer->dhtgetcls = path_info;
1346 GNUNET_DHT_get_start(dht_handle, /* handle */
1347 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1348 GNUNET_BLOCK_TYPE_TEST, /* type */
1349 &id.hashPubKey, /* key to search */
1350 4, /* replication level */
1351 GNUNET_DHT_RO_RECORD_ROUTE |
1352 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1354 0, /* xquery bits */
1355 &dht_get_id_handler,
1358 /* Otherwise, there is no path but the DHT get is already started. */
1363 * Task to delay the connection of a peer
1365 * @param cls Closure (path info with tunnel and peer to connect).
1366 * Will be free'd on exection.
1367 * @param tc TaskContext
1370 peer_info_connect_task (void *cls,
1371 const struct GNUNET_SCHEDULER_TaskContext *tc)
1373 struct MeshPathInfo *path_info = cls;
1375 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1380 peer_info_connect (path_info->peer, path_info->t);
1386 * Destroy the peer_info and free any allocated resources linked to it
1388 * @param pi The peer_info to destroy.
1390 * @return GNUNET_OK on success
1393 peer_info_destroy (struct MeshPeerInfo *pi)
1395 struct GNUNET_PeerIdentity id;
1396 struct MeshPeerPath *p;
1397 struct MeshPeerPath *nextp;
1400 GNUNET_PEER_resolve (pi->id, &id);
1401 GNUNET_PEER_change_rc (pi->id, -1);
1404 GNUNET_CONTAINER_multihashmap_remove (peers,&id.hashPubKey, pi))
1407 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1408 "MESH: removing peer %s, not in hashmap\n",
1411 if (NULL != pi->dhtget)
1413 GNUNET_DHT_get_stop(pi->dhtget);
1414 GNUNET_free (pi->dhtgetcls);
1416 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1418 peer_info_cancel_transmission(pi, i);
1424 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1434 * Remove all paths that rely on a direct connection between p1 and p2
1435 * from the peer itself and notify all tunnels about it.
1437 * @param peer PeerInfo of affected peer.
1438 * @param p1 GNUNET_PEER_Id of one peer.
1439 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1442 * TODO: optimize (see below)
1445 path_remove_from_peer (struct MeshPeerInfo *peer,
1449 struct MeshPeerPath *p;
1450 struct MeshPeerPath *aux;
1451 struct MeshPeerInfo *peer_d;
1453 unsigned int destroyed;
1459 p = peer->path_head;
1463 for (i = 0; i < (p->length - 1); i++)
1465 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1466 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1468 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1479 for (i = 0; i < peer->ntunnels; i++)
1481 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1483 * Problem: one or more peers have been deleted from the tunnel tree.
1484 * We don't know who they are to try to add them again.
1485 * We need to try to find a new path for each of the disconnected peers.
1486 * Some of them might already have a path to reach them that does not
1487 * involve p1 and p2. Adding all anew might render in a better tree than
1488 * the trivial immediate fix.
1490 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1491 * its children will be reachable trough him.
1493 peer_d = peer_info_get_short(d);
1496 for (p = peer_d->path_head; NULL != p; p = p->next)
1498 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1506 /* No callback, as peer will be already disconnected */
1507 tree_add_path(peer->tunnels[i]->tree, aux, NULL, NULL);
1511 peer_info_connect (peer_d, peer->tunnels[i]);
1518 * Add the path to the peer and update the path used to reach it in case this
1521 * @param peer_info Destination peer to add the path to.
1522 * @param path New path to add. Last peer must be the peer in arg 1.
1523 * Path will be either used of freed if already known.
1524 * @param trusted Do we trust that this path is real?
1527 path_add_to_peer (struct MeshPeerInfo *peer_info,
1528 struct MeshPeerPath *path,
1531 struct MeshPeerPath *aux;
1535 if ((NULL == peer_info) || (NULL == path))
1538 path_destroy (path);
1541 if (path->length <= 2 && GNUNET_NO == trusted)
1543 /* Only allow CORE to tell us about direct paths */
1544 path_destroy (path);
1547 for (l = 1; l < path->length; l++)
1549 if (path->peers[l] == myid)
1551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1552 "MESH: shortening path by %u\n",
1554 for (l2 = 0; l2 < path->length - l - 1 ; l2++)
1556 path->peers[l2] = path->peers[l + l2];
1560 path->peers = GNUNET_realloc (path->peers,
1561 path->length * sizeof (GNUNET_PEER_Id));
1566 struct GNUNET_PeerIdentity id;
1568 GNUNET_PEER_resolve (peer_info->id, &id);
1569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1570 "MESH: adding path [%u] to peer %s\n",
1575 l = path_get_length (path);
1582 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1584 l2 = path_get_length (aux);
1587 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1588 peer_info->path_tail,
1595 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1602 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1603 peer_info->path_tail,
1610 * Add the path to the origin peer and update the path used to reach it in case
1611 * this is the shortest.
1612 * The path is given in peer_info -> destination, therefore we turn the path
1613 * upside down first.
1615 * @param peer_info Peer to add the path to, being the origin of the path.
1616 * @param path New path to add after being inversed.
1617 * @param trusted Do we trust that this path is real?
1620 path_add_to_origin (struct MeshPeerInfo *peer_info,
1621 struct MeshPeerPath *path,
1625 path_add_to_peer (peer_info, path, trusted);
1630 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1631 * to obtain a local peer -> destination path and interning the peer ids.
1633 * @return Newly allocated and created path
1635 static struct MeshPeerPath *
1636 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1637 unsigned int get_path_length,
1638 const struct GNUNET_PeerIdentity *put_path,
1639 unsigned int put_path_length)
1641 struct MeshPeerPath *p;
1647 GNUNET_PEER_change_rc(myid, 1);
1648 i = get_path_length;
1649 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1650 for (i--; i >= 0; i--)
1652 id = GNUNET_PEER_intern (&get_path[i]);
1653 if (p->length > 0 && id == p->peers[p->length - 1])
1655 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1656 GNUNET_PEER_change_rc(id, -1);
1660 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1661 "MESH: Adding from GET: %s.\n",
1662 GNUNET_i2s(&get_path[i]));
1664 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1665 p->peers[p->length - 1] = id;
1668 i = put_path_length;
1669 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1670 for (i--; i >= 0; i--)
1672 id = GNUNET_PEER_intern (&put_path[i]);
1675 /* PUT path went through us, so discard the path up until now and start
1676 * from here to get a much shorter (and loop-free) path.
1681 if (p->length > 0 && id == p->peers[p->length - 1])
1683 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1684 GNUNET_PEER_change_rc(id, -1);
1688 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1689 "MESH: Adding from PUT: %s.\n",
1690 GNUNET_i2s(&put_path[i]));
1692 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1693 p->peers[p->length - 1] = id;
1697 if (get_path_length > 0)
1698 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1699 "MESH: (first of GET: %s)\n",
1700 GNUNET_i2s(&get_path[0]));
1701 if (put_path_length > 0)
1702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1703 "MESH: (first of PUT: %s)\n",
1704 GNUNET_i2s(&put_path[0]));
1705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1706 "MESH: In total: %d hops\n",
1708 for (i = 0; i < p->length; i++)
1710 struct GNUNET_PeerIdentity peer_id;
1712 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1716 GNUNET_i2s(&peer_id));
1724 * Send keepalive packets for a peer
1726 * @param cls Closure (tunnel for which to send the keepalive).
1727 * @param tc Notification context.
1729 * TODO: implement explicit multicast keepalive?
1732 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1736 * Search for a tunnel among the incoming tunnels
1738 * @param tid the local id of the tunnel
1740 * @return tunnel handler, NULL if doesn't exist
1742 static struct MeshTunnel *
1743 tunnel_get_incoming (MESH_TunnelNumber tid)
1745 GNUNET_HashCode hash;
1747 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1748 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1749 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1754 * Search for a tunnel among the tunnels for a client
1756 * @param c the client whose tunnels to search in
1757 * @param tid the local id of the tunnel
1759 * @return tunnel handler, NULL if doesn't exist
1761 static struct MeshTunnel *
1762 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1764 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1766 return tunnel_get_incoming (tid);
1770 GNUNET_HashCode hash;
1772 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1773 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1779 * Search for a tunnel by global ID using PEER_ID
1781 * @param pi owner of the tunnel
1782 * @param tid global tunnel number
1784 * @return tunnel handler, NULL if doesn't exist
1786 static struct MeshTunnel *
1787 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1789 struct MESH_TunnelID id;
1790 GNUNET_HashCode hash;
1795 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1796 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1801 * Search for a tunnel by global ID using full PeerIdentities
1803 * @param oid owner of the tunnel
1804 * @param tid global tunnel number
1806 * @return tunnel handler, NULL if doesn't exist
1808 static struct MeshTunnel *
1809 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1811 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1816 * Callback used to notify a client owner of a tunnel that a peer has
1817 * disconnected, most likely because of a path change.
1819 * @param cls Closure (tunnel this notification is about).
1820 * @param peer_id Short ID of disconnected peer.
1823 notify_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
1825 struct MeshTunnel *t = cls;
1826 struct MeshPeerInfo *peer;
1827 struct MeshPathInfo *path_info;
1829 if (NULL != t->client && NULL != nc)
1831 struct GNUNET_MESH_PeerControl msg;
1832 msg.header.size = htons (sizeof (msg));
1833 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1834 msg.tunnel_id = htonl (t->local_tid);
1835 GNUNET_PEER_resolve (peer_id, &msg.peer);
1836 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1837 &msg.header, GNUNET_NO);
1839 peer = peer_info_get_short(peer_id);
1840 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1841 path_info->peer = peer;
1843 GNUNET_SCHEDULER_add_now(&peer_info_connect_task, path_info);
1848 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1849 * needed rescources.
1850 * If peer already exists, reevaluate shortest path and change if different.
1852 * @param t Tunnel we want to add a new peer to
1853 * @param peer PeerInfo of the peer being added
1857 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1859 struct GNUNET_PeerIdentity id;
1860 struct MeshPeerPath *best_p;
1861 struct MeshPeerPath *p;
1862 unsigned int best_cost;
1865 GNUNET_PEER_resolve(peer->id, &id);
1867 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1870 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1871 GNUNET_assert (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put(
1875 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1878 if (NULL != (p = peer->path_head))
1881 best_cost = path_get_cost(t->tree, p);
1884 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1891 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected, t);
1892 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1893 t->path_refresh_task =
1894 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
1898 /* Start a DHT get if necessary */
1899 peer_info_connect(peer, t);
1904 * Add a path to a tunnel which we don't own, just to remember the next hop.
1905 * If destination node was already in the tunnel, the first hop information
1906 * will be replaced with the new path.
1908 * @param t Tunnel we want to add a new peer to
1909 * @param p Path to add
1910 * @param own_pos Position of local node in path.
1914 tunnel_add_path (struct MeshTunnel *t,
1915 struct MeshPeerPath *p,
1916 unsigned int own_pos)
1918 struct GNUNET_PeerIdentity id;
1920 GNUNET_assert (0 != own_pos);
1921 tree_add_path(t->tree, p, NULL, NULL);
1922 if (tree_get_me (t->tree) == 0)
1923 tree_set_me (t->tree, p->peers[own_pos]);
1924 if (own_pos < p->length - 1)
1926 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1927 tree_update_first_hops(t->tree,
1928 tree_get_me (t->tree),
1935 * Notifies a tunnel that a connection has broken that affects at least
1936 * some of its peers. Sends a notification towards the root of the tree.
1937 * In case the peer is the owner of the tree, notifies the client that owns
1938 * the tunnel and tries to reconnect.
1940 * @param t Tunnel affected.
1941 * @param p1 Peer that got disconnected from p2.
1942 * @param p2 Peer that got disconnected from p1.
1944 * @return Short ID of the peer disconnected (either p1 or p2).
1945 * 0 if the tunnel remained unaffected.
1947 static GNUNET_PEER_Id
1948 tunnel_notify_connection_broken (struct MeshTunnel *t,
1954 pid = tree_notify_connection_broken (t->tree,
1957 ¬ify_peer_disconnected,
1959 if (myid != p1 && myid != p2)
1965 if (tree_get_predecessor(t->tree) != 0)
1967 /* We are the peer still connected, notify owner of the disconnection. */
1968 struct GNUNET_MESH_PathBroken msg;
1969 struct GNUNET_PeerIdentity neighbor;
1971 msg.header.size = htons (sizeof (msg));
1972 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1973 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1974 msg.tid = htonl (t->id.tid);
1975 msg.peer1 = my_full_id;
1976 GNUNET_PEER_resolve (pid, &msg.peer2);
1977 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
1978 send_message (&msg.header, &neighbor);
1985 struct MeshMulticastData
1987 struct MeshTunnel *t;
1989 GNUNET_SCHEDULER_TaskIdentifier *task;
1991 unsigned int *reference_counter;
2000 * Send a multicast packet to a neighbor.
2003 tunnel_send_multicast_iterator (void *cls,
2004 GNUNET_PEER_Id neighbor_id)
2006 struct MeshMulticastData *mdata = cls;
2007 struct MeshDataDescriptor *info;
2008 struct GNUNET_PeerIdentity neighbor;
2011 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2013 info->data = mdata->data;
2014 info->size = mdata->data_len;
2015 info->copies = mdata->reference_counter;
2016 (*(mdata->reference_counter))++;
2018 if (NULL != mdata->t->client)
2020 info->client = mdata->t->client->handle;
2021 info->timeout_task = mdata->task;
2023 info->destination = neighbor_id;
2024 GNUNET_PEER_resolve (neighbor_id, &neighbor);
2026 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2027 "MESH: sending to %s...\n",
2028 GNUNET_i2s (&neighbor));
2030 info->peer = peer_info_get(&neighbor);
2031 GNUNET_assert (NULL != info->peer);
2032 i = peer_info_transmit_slot(info->peer);
2033 info->handler_n = i;
2034 info->peer->infos[i] = info;
2035 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2036 info->peer->core_transmit[i] =
2037 GNUNET_CORE_notify_transmit_ready (core_handle,
2040 GNUNET_TIME_UNIT_FOREVER_REL,
2043 &send_core_data_multicast, info);
2047 * Send a message in a tunnel in multicast, sending a copy to each child node
2048 * down the local one in the tunnel tree.
2050 * @param t Tunnel in which to send the data.
2051 * @param msg Message to be sent
2054 tunnel_send_multicast (struct MeshTunnel *t,
2055 const struct GNUNET_MessageHeader *msg)
2057 struct MeshMulticastData *mdata;
2060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2061 "MESH: sending a multicast packet...\n");
2063 GNUNET_assert (tree_get_me (t->tree) != 0);
2064 mdata = GNUNET_malloc (sizeof (struct MeshMulticastData));
2065 mdata->data_len = ntohs (msg->size);
2066 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2067 mdata->data = GNUNET_malloc (mdata->data_len);
2069 memcpy (mdata->data, msg, mdata->data_len);
2070 if (NULL != t->client)
2072 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
2073 *(mdata->task) = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
2078 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
2079 if (*(mdata->reference_counter) == 0)
2081 GNUNET_free (mdata->data);
2082 GNUNET_free (mdata->reference_counter);
2083 if (NULL != mdata->task)
2085 GNUNET_free (mdata->task);
2088 GNUNET_free (mdata);
2090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2091 "MESH: sending a multicast packet done\n");
2098 * Send a message to all peers in this tunnel that the tunnel is no longer
2101 * @param t The tunnel whose peers to notify.
2104 tunnel_send_destroy (struct MeshTunnel *t)
2106 struct GNUNET_MESH_TunnelDestroy msg;
2108 msg.header.size = htons (sizeof (msg));
2109 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2110 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2111 msg.tid = htonl (t->id.tid);
2112 tunnel_send_multicast (t, &msg.header);
2118 * Destroy the tunnel and free any allocated resources linked to it
2120 * @param t the tunnel to destroy
2122 * @return GNUNET_OK on success
2125 tunnel_destroy (struct MeshTunnel *t)
2127 struct MeshClient *c;
2128 struct MeshQueue *q;
2129 struct MeshQueue *qn;
2130 GNUNET_HashCode hash;
2139 struct GNUNET_PeerIdentity id;
2141 GNUNET_PEER_resolve(t->id.oid, &id);
2142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2143 "MESH: destroying tunnel %s [%x]\n",
2147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2151 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2152 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2157 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2159 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2163 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2165 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2166 GNUNET_break (GNUNET_YES ==
2167 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2169 if (NULL != t->peers)
2171 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2172 &peer_info_delete_tunnel, t);
2173 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2178 if (NULL != q->data)
2179 GNUNET_free (q->data);
2183 /* TODO cancel core transmit ready in case it was active */
2185 tree_destroy(t->tree);
2186 if (NULL != t->dht_get_type)
2187 GNUNET_DHT_get_stop(t->dht_get_type);
2188 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2189 GNUNET_SCHEDULER_cancel(t->timeout_task);
2190 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2191 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2198 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2199 * that are no longer needed, as well as nodes of no longer reachable peers.
2200 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2202 * @param t Tunnel from which to remove the path.
2203 * @param p Peer which should be removed.
2206 tunnel_delete_peer (struct MeshTunnel *t,
2207 GNUNET_PEER_Id peer)
2209 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
2215 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2216 * client when the client disconnects.
2218 * @param cls closure (client that is disconnecting)
2219 * @param key the hash of the local tunnel id (used to access the hashmap)
2220 * @param value the value stored at the key (tunnel to destroy)
2222 * @return GNUNET_OK on success
2225 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2227 struct MeshTunnel *t = value;
2230 r = tunnel_destroy (t);
2236 * Timeout function, destroys tunnel if called
2238 * @param cls Closure (tunnel to destroy).
2239 * @param tc TaskContext
2242 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2244 struct MeshTunnel *t = cls;
2246 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2248 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2253 * Resets the tunnel timeout. Starts it if no timeout was running.
2255 * @param t Tunnel whose timeout to reset.
2258 tunnel_reset_timeout (struct MeshTunnel *t)
2260 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2261 GNUNET_SCHEDULER_cancel (t->timeout_task);
2262 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2263 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2269 /******************************************************************************/
2270 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2271 /******************************************************************************/
2274 * Function called to notify a client about the socket
2275 * being ready to queue more data. "buf" will be
2276 * NULL and "size" zero if the socket was closed for
2277 * writing in the meantime.
2279 * @param cls closure
2280 * @param size number of bytes available in buf
2281 * @param buf where the callee should write the message
2282 * @return number of bytes written to buf
2285 send_core_create_path (void *cls, size_t size, void *buf)
2287 struct MeshPathInfo *info = cls;
2288 struct GNUNET_MESH_ManipulatePath *msg;
2289 struct GNUNET_PeerIdentity *peer_ptr;
2290 struct MeshPeerInfo *peer = info->peer;
2291 struct MeshTunnel *t = info->t;
2292 struct MeshPeerPath *p = info->path;
2296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2297 "MESH: CREATE PATH sending...\n");
2299 sizeof (struct GNUNET_MESH_ManipulatePath) +
2300 p->length * sizeof (struct GNUNET_PeerIdentity);
2302 if (size < size_needed || NULL == buf)
2304 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2308 info->peer->core_transmit[info->pos] =
2309 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2310 GNUNET_TIME_UNIT_FOREVER_REL,
2311 path_get_first_hop (t->tree, peer->id),
2313 &send_core_create_path,
2317 info->peer->core_transmit[info->pos] = NULL;
2320 struct GNUNET_PeerIdentity id;
2322 GNUNET_PEER_resolve (peer->id, &id);
2323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2324 "MESH: setting core_transmit %s [%u] to NULL\n",
2329 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2330 msg->header.size = htons (size_needed);
2331 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2332 msg->tid = ntohl (t->id.tid);
2334 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2335 for (i = 0; i < p->length; i++)
2337 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2344 "MESH: CREATE PATH (%u bytes long) sent!\n",
2351 * Function called to notify a client about the socket
2352 * being ready to queue more data. "buf" will be
2353 * NULL and "size" zero if the socket was closed for
2354 * writing in the meantime.
2356 * @param cls closure (data itself)
2357 * @param size number of bytes available in buf
2358 * @param buf where the callee should write the message
2360 * @return number of bytes written to buf
2363 send_core_data_multicast (void *cls, size_t size, void *buf)
2365 struct MeshDataDescriptor *info = cls;
2368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2369 GNUNET_assert (NULL != info);
2370 GNUNET_assert (NULL != info->peer);
2371 total_size = info->size;
2372 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2374 if (total_size > size)
2377 struct GNUNET_PeerIdentity id;
2379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2380 "MESH: Multicast: retransmitting... (%u/%u)\n",
2382 GNUNET_PEER_resolve(info->peer->id, &id);
2383 info->peer->core_transmit[info->handler_n] =
2384 GNUNET_CORE_notify_transmit_ready (core_handle,
2387 GNUNET_TIME_UNIT_FOREVER_REL,
2390 &send_core_data_multicast,
2394 info->peer->core_transmit[info->handler_n] = NULL;
2395 info->peer->infos[info->handler_n] = NULL;
2396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2397 memcpy (buf, info->data, total_size);
2400 struct GNUNET_MESH_Multicast *mc;
2401 struct GNUNET_MessageHeader *mh;
2404 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2406 mc = (struct GNUNET_MESH_Multicast *) mh;
2407 mh = (struct GNUNET_MessageHeader *) &mc[1];
2408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2409 "MESH: multicast, payload type %u\n",
2411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2412 "MESH: multicast, payload size %u\n",
2417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2423 data_descriptor_decrement_multicast (info);
2424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2432 * Function called to notify a client about the socket
2433 * being ready to queue more data. "buf" will be
2434 * NULL and "size" zero if the socket was closed for
2435 * writing in the meantime.
2437 * @param cls closure (MeshDataDescriptor)
2438 * @param size number of bytes available in buf
2439 * @param buf where the callee should write the message
2440 * @return number of bytes written to buf
2443 send_core_path_ack (void *cls, size_t size, void *buf)
2445 struct MeshDataDescriptor *info = cls;
2446 struct GNUNET_MESH_PathACK *msg = buf;
2448 GNUNET_assert (NULL != info);
2451 info->peer->core_transmit[info->handler_n] = NULL;
2453 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2458 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2459 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2460 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2461 msg->tid = htonl (info->origin->tid);
2462 msg->peer_id = my_full_id;
2464 /* TODO add signature */
2466 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2467 return sizeof (struct GNUNET_MESH_PathACK);
2471 /******************************************************************************/
2472 /******************** MESH NETWORK HANDLERS **************************/
2473 /******************************************************************************/
2477 * Core handler for path creation
2479 * @param cls closure
2480 * @param message message
2481 * @param peer peer identity this notification is about
2482 * @param atsi performance data
2483 * @param atsi_count number of records in 'atsi'
2485 * @return GNUNET_OK to keep the connection open,
2486 * GNUNET_SYSERR to close it (signal serious error)
2489 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2490 const struct GNUNET_MessageHeader *message,
2491 const struct GNUNET_ATS_Information *atsi,
2492 unsigned int atsi_count)
2494 unsigned int own_pos;
2497 MESH_TunnelNumber tid;
2498 struct GNUNET_MESH_ManipulatePath *msg;
2499 struct GNUNET_PeerIdentity *pi;
2500 GNUNET_HashCode hash;
2501 struct MeshPeerPath *path;
2502 struct MeshPeerInfo *dest_peer_info;
2503 struct MeshPeerInfo *orig_peer_info;
2504 struct MeshTunnel *t;
2506 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2507 "MESH: Received a path create msg [%s]\n",
2508 GNUNET_i2s(&my_full_id));
2509 size = ntohs (message->size);
2510 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2512 GNUNET_break_op (0);
2516 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2517 if (size % sizeof (struct GNUNET_PeerIdentity))
2519 GNUNET_break_op (0);
2522 size /= sizeof (struct GNUNET_PeerIdentity);
2525 GNUNET_break_op (0);
2528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2529 "MESH: path has %u hops.\n",
2531 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2533 tid = ntohl (msg->tid);
2534 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2535 t = tunnel_get (pi, tid);
2536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2537 "MESH: path is for tunnel %s [%X].\n",
2542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2543 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2544 t->id.oid = GNUNET_PEER_intern (pi);
2546 while (NULL != tunnel_get_incoming (next_local_tid))
2547 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2548 t->local_tid = next_local_tid++;
2549 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2550 t->tree = tree_new(t->id.oid);
2552 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2554 GNUNET_CONTAINER_multihashmap_put (
2558 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2564 tunnel_reset_timeout (t);
2565 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2567 GNUNET_CONTAINER_multihashmap_put (
2571 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2579 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2580 if (NULL == dest_peer_info)
2582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2583 "MESH: Creating PeerInfo for destination.\n");
2584 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2585 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2586 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2588 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2590 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2591 if (NULL == orig_peer_info)
2593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2594 "MESH: Creating PeerInfo for origin.\n");
2595 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2596 orig_peer_info->id = GNUNET_PEER_intern (pi);
2597 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2598 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2601 path = path_new (size);
2603 for (i = 0; i < size; i++)
2605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2606 "MESH: ... adding %s\n",
2607 GNUNET_i2s(&pi[i]));
2608 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2609 if (path->peers[i] == myid)
2612 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2613 "MESH: Own position: %u\n", own_pos);
2616 /* cannot be self, must be 'not found' */
2617 /* create path: self not found in path through self */
2618 GNUNET_break_op (0);
2619 path_destroy (path);
2620 /* FIXME error. destroy tunnel? leave for timeout? */
2623 tunnel_add_path (t, path, own_pos);
2624 if (own_pos == size - 1)
2626 /* It is for us! Send ack. */
2627 struct GNUNET_MESH_TunnelNotification cmsg;
2628 struct MeshDataDescriptor *info;
2631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2632 "MESH: It's for us!\n");
2633 path_add_to_origin (orig_peer_info, path, GNUNET_NO);
2634 if (NULL == t->peers)
2635 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2636 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2638 &my_full_id.hashPubKey,
2639 peer_info_get(&my_full_id),
2640 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2641 /* FIXME use send_message */
2642 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2643 info->origin = &t->id;
2644 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2645 GNUNET_assert (NULL != info->peer);
2646 j = peer_info_transmit_slot(info->peer);
2647 info->handler_n = j;
2648 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2649 info->peer->infos[j] = info;
2650 info->peer->core_transmit[j] =
2651 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2652 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2653 sizeof (struct GNUNET_MESH_PathACK),
2654 &send_core_path_ack, info);
2655 cmsg.header.size = htons(sizeof(cmsg));
2656 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2657 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2658 cmsg.tunnel_id = htonl(t->local_tid);
2659 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2663 struct MeshPeerPath *path2;
2665 /* It's for somebody else! Retransmit. */
2666 path2 = path_duplicate(path);
2667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2668 "MESH: Retransmitting.\n");
2669 path_add_to_peer(dest_peer_info, path2, GNUNET_NO);
2670 path2 = path_duplicate(path);
2671 path_add_to_origin(orig_peer_info, path2, GNUNET_NO);
2672 send_create_path(dest_peer_info, path, t);
2679 * Core handler for path destruction
2681 * @param cls closure
2682 * @param message message
2683 * @param peer peer identity this notification is about
2684 * @param atsi performance data
2685 * @param atsi_count number of records in 'atsi'
2687 * @return GNUNET_OK to keep the connection open,
2688 * GNUNET_SYSERR to close it (signal serious error)
2691 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2692 const struct GNUNET_MessageHeader *message,
2693 const struct GNUNET_ATS_Information *atsi,
2694 unsigned int atsi_count)
2696 struct GNUNET_MESH_ManipulatePath *msg;
2697 struct GNUNET_PeerIdentity *pi;
2698 struct MeshPeerPath *path;
2699 struct MeshTunnel *t;
2700 unsigned int own_pos;
2704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2705 "MESH: Received a PATH DESTROY msg from %s\n",
2707 size = ntohs (message->size);
2708 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2710 GNUNET_break_op (0);
2714 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2715 if (size % sizeof (struct GNUNET_PeerIdentity))
2717 GNUNET_break_op (0);
2720 size /= sizeof (struct GNUNET_PeerIdentity);
2723 GNUNET_break_op (0);
2726 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2727 "MESH: path has %u hops.\n",
2730 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2731 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2733 "MESH: path is for tunnel %s [%X].\n",
2736 t = tunnel_get (pi, ntohl (msg->tid));
2739 /* TODO notify back: we don't know this tunnel */
2740 GNUNET_break_op (0);
2743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2744 path = path_new (size);
2746 for (i = 0; i < size; i++)
2748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2749 "MESH: ... adding %s\n",
2750 GNUNET_i2s(&pi[i]));
2751 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2752 if (path->peers[i] == myid)
2755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2756 "MESH: Own position: %u\n", own_pos);
2757 if (own_pos < path->length - 1)
2758 send_message (message, &pi[own_pos + 1]);
2759 tunnel_delete_peer (t, path->peers[path->length - 1]);
2760 path_destroy (path);
2766 * Core handler for notifications of broken paths
2768 * @param cls closure
2769 * @param message message
2770 * @param peer peer identity this notification is about
2771 * @param atsi performance data
2772 * @param atsi_count number of records in 'atsi'
2774 * @return GNUNET_OK to keep the connection open,
2775 * GNUNET_SYSERR to close it (signal serious error)
2778 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2779 const struct GNUNET_MessageHeader *message,
2780 const struct GNUNET_ATS_Information *atsi,
2781 unsigned int atsi_count)
2783 struct GNUNET_MESH_PathBroken *msg;
2784 struct MeshTunnel *t;
2786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2787 "MESH: Received a PATH BROKEN msg from %s\n",
2789 msg = (struct GNUNET_MESH_PathBroken *) message;
2790 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2791 "MESH: regarding %s\n",
2792 GNUNET_i2s(&msg->peer1));
2793 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2794 "MESH: regarding %s\n",
2795 GNUNET_i2s(&msg->peer2));
2796 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2799 GNUNET_break_op (0);
2802 tunnel_notify_connection_broken(t,
2803 GNUNET_PEER_search(&msg->peer1),
2804 GNUNET_PEER_search(&msg->peer2));
2811 * Core handler for tunnel destruction
2813 * @param cls closure
2814 * @param message message
2815 * @param peer peer identity this notification is about
2816 * @param atsi performance data
2817 * @param atsi_count number of records in 'atsi'
2819 * @return GNUNET_OK to keep the connection open,
2820 * GNUNET_SYSERR to close it (signal serious error)
2823 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2824 const struct GNUNET_MessageHeader *message,
2825 const struct GNUNET_ATS_Information *atsi,
2826 unsigned int atsi_count)
2828 struct GNUNET_MESH_TunnelDestroy *msg;
2829 struct MeshTunnel *t;
2831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2832 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2834 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2836 "MESH: for tunnel %s [%u]\n",
2837 GNUNET_i2s (&msg->oid),
2839 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2842 /* Probably already got the message from another path,
2843 * destroyed the tunnel and retransmitted to children.
2848 if (t->id.oid == myid)
2850 GNUNET_break_op (0);
2853 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2855 /* Tunnel was incoming, notify clients */
2856 send_clients_tunnel_destroy (t);
2858 tunnel_send_destroy (t);
2865 * Core handler for mesh network traffic going from the origin to a peer
2867 * @param cls closure
2868 * @param peer peer identity this notification is about
2869 * @param message message
2870 * @param atsi performance data
2871 * @param atsi_count number of records in 'atsi'
2872 * @return GNUNET_OK to keep the connection open,
2873 * GNUNET_SYSERR to close it (signal serious error)
2876 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2877 const struct GNUNET_MessageHeader *message,
2878 const struct GNUNET_ATS_Information *atsi,
2879 unsigned int atsi_count)
2881 struct GNUNET_MESH_Unicast *msg;
2882 struct MeshTunnel *t;
2886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2887 "MESH: got a unicast packet from %s\n",
2889 size = ntohs (message->size);
2891 sizeof (struct GNUNET_MESH_Unicast) +
2892 sizeof (struct GNUNET_MessageHeader))
2897 msg = (struct GNUNET_MESH_Unicast *) message;
2898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2899 "MESH: of type %u\n",
2900 ntohs (msg[1].header.type));
2901 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2904 /* TODO notify back: we don't know this tunnel */
2905 GNUNET_break_op (0);
2908 tunnel_reset_timeout (t);
2909 pid = GNUNET_PEER_search(&msg->destination);
2912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2913 "MESH: it's for us! sending to clients...\n");
2914 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2917 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2918 "MESH: not for us, retransmitting...\n");
2919 send_message (message, path_get_first_hop(t->tree, pid));
2925 * Core handler for mesh network traffic going from the origin to all peers
2927 * @param cls closure
2928 * @param message message
2929 * @param peer peer identity this notification is about
2930 * @param atsi performance data
2931 * @param atsi_count number of records in 'atsi'
2932 * @return GNUNET_OK to keep the connection open,
2933 * GNUNET_SYSERR to close it (signal serious error)
2935 * TODO: Check who we got this from, to validate route.
2938 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2939 const struct GNUNET_MessageHeader *message,
2940 const struct GNUNET_ATS_Information *atsi,
2941 unsigned int atsi_count)
2943 struct GNUNET_MESH_Multicast *msg;
2944 struct MeshTunnel *t;
2947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2948 "MESH: got a multicast packet from %s\n",
2950 size = ntohs (message->size);
2951 if (sizeof (struct GNUNET_MESH_Multicast) +
2952 sizeof (struct GNUNET_MessageHeader) > size)
2954 GNUNET_break_op (0);
2957 msg = (struct GNUNET_MESH_Multicast *) message;
2958 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2962 /* TODO notify that we dont know that tunnel */
2963 GNUNET_break_op (0);
2966 tunnel_reset_timeout (t);
2968 /* Transmit to locally interested clients */
2969 if (NULL != t->peers &&
2970 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2972 send_subscribed_clients (message, &msg[1].header);
2974 tunnel_send_multicast(t, message);
2980 * Core handler for mesh network traffic toward the owner of a tunnel
2982 * @param cls closure
2983 * @param message message
2984 * @param peer peer identity this notification is about
2985 * @param atsi performance data
2986 * @param atsi_count number of records in 'atsi'
2988 * @return GNUNET_OK to keep the connection open,
2989 * GNUNET_SYSERR to close it (signal serious error)
2992 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2993 const struct GNUNET_MessageHeader *message,
2994 const struct GNUNET_ATS_Information *atsi,
2995 unsigned int atsi_count)
2997 struct GNUNET_MESH_ToOrigin *msg;
2998 struct GNUNET_PeerIdentity id;
2999 struct MeshPeerInfo *peer_info;
3000 struct MeshTunnel *t;
3003 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3004 "MESH: got a ToOrigin packet from %s\n",
3006 size = ntohs (message->size);
3007 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3008 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3010 GNUNET_break_op (0);
3013 msg = (struct GNUNET_MESH_ToOrigin *) message;
3014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3015 "MESH: of type %u\n",
3016 ntohs (msg[1].header.type));
3017 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3021 /* TODO notify that we dont know this tunnel (whom)? */
3022 GNUNET_break_op (0);
3026 if (t->id.oid == myid)
3029 struct GNUNET_MESH_ToOrigin *copy;
3031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3032 "MESH: it's for us! sending to clients...\n");
3033 if (NULL == t->client)
3035 /* got data packet for ownerless tunnel */
3036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3037 "MESH: no clients!\n");
3038 GNUNET_break_op (0);
3041 /* TODO signature verification */
3042 memcpy (cbuf, message, size);
3043 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3044 copy->tid = htonl (t->local_tid);
3045 GNUNET_SERVER_notification_context_unicast (nc,
3051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3052 "MESH: not for us, retransmitting...\n");
3054 peer_info = peer_info_get (&msg->oid);
3055 if (NULL == peer_info)
3057 /* unknown origin of tunnel */
3061 GNUNET_PEER_resolve (tree_get_predecessor(t->tree), &id);
3062 send_message (message, &id);
3069 * Core handler for path ACKs
3071 * @param cls closure
3072 * @param message message
3073 * @param peer peer identity this notification is about
3074 * @param atsi performance data
3075 * @param atsi_count number of records in 'atsi'
3077 * @return GNUNET_OK to keep the connection open,
3078 * GNUNET_SYSERR to close it (signal serious error)
3081 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3082 const struct GNUNET_MessageHeader *message,
3083 const struct GNUNET_ATS_Information *atsi,
3084 unsigned int atsi_count)
3086 struct GNUNET_MESH_PathACK *msg;
3087 struct GNUNET_PeerIdentity id;
3088 struct MeshPeerInfo *peer_info;
3089 struct MeshTunnel *t;
3091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3092 "MESH: Received a path ACK msg [%s]\n",
3093 GNUNET_i2s(&my_full_id));
3094 msg = (struct GNUNET_MESH_PathACK *) message;
3095 t = tunnel_get (&msg->oid, msg->tid);
3098 /* TODO notify that we don't know the tunnel */
3102 /* Message for us? */
3103 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
3106 if (NULL == t->client)
3108 GNUNET_break_op (0);
3111 if (NULL != t->dht_get_type)
3113 GNUNET_DHT_get_stop (t->dht_get_type);
3114 t->dht_get_type = NULL;
3116 peer_info = peer_info_get (&msg->peer_id);
3117 tree_set_status(t->tree, peer_info->id, MESH_PEER_READY);
3118 send_client_peer_connected(t, peer_info->id);
3122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3123 "MESH: not for us, retransmitting...\n");
3124 GNUNET_PEER_resolve(tree_get_predecessor(t->tree), &id);
3125 peer_info = peer_info_get (&msg->oid);
3126 if (NULL == peer_info)
3128 /* If we know the tunnel, we should DEFINITELY know the peer */
3132 send_message (message, &id);
3138 * Functions to handle messages from core
3140 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3141 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3142 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3143 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3144 sizeof (struct GNUNET_MESH_PathBroken)},
3145 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3146 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3147 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3148 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3149 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3150 sizeof (struct GNUNET_MESH_PathACK)},
3156 /******************************************************************************/
3157 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3158 /******************************************************************************/
3161 * deregister_app: iterator for removing each application registered by a client
3163 * @param cls closure
3164 * @param key the hash of the application id (used to access the hashmap)
3165 * @param value the value stored at the key (client)
3167 * @return GNUNET_OK on success
3170 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3172 GNUNET_break (GNUNET_YES ==
3173 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3179 * notify_client_connection_failure: notify a client that the connection to the
3180 * requested remote peer is not possible (for instance, no route found)
3181 * Function called when the socket is ready to queue more data. "buf" will be
3182 * NULL and "size" zero if the socket was closed for writing in the meantime.
3184 * @param cls closure
3185 * @param size number of bytes available in buf
3186 * @param buf where the callee should write the message
3187 * @return number of bytes written to buf
3190 notify_client_connection_failure (void *cls, size_t size, void *buf)
3193 struct MeshPeerInfo *peer_info;
3194 struct GNUNET_MESH_PeerControl *msg;
3195 struct GNUNET_PeerIdentity id;
3197 if (0 == size && NULL == buf)
3199 // TODO retry? cancel?
3203 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3204 peer_info = (struct MeshPeerInfo *) cls;
3205 msg = (struct GNUNET_MESH_PeerControl *) buf;
3206 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3207 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3208 // msg->tunnel_id = htonl(peer_info->t->tid);
3209 GNUNET_PEER_resolve (peer_info->id, &id);
3210 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3218 * Send keepalive packets for a peer
3220 * @param cls Closure (tunnel for which to send the keepalive).
3221 * @param tc Notification context.
3223 * TODO: implement explicit multicast keepalive?
3226 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3228 struct MeshTunnel *t = cls;
3229 struct GNUNET_MessageHeader *payload;
3230 struct GNUNET_MESH_Multicast *msg;
3231 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3232 sizeof(struct GNUNET_MessageHeader);
3235 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3239 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3242 "MESH: sending keepalive for tunnel %d\n",
3245 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3246 msg->header.size = htons (size);
3247 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3248 msg->oid = my_full_id;
3249 msg->tid = htonl(t->id.tid);
3250 payload = (struct GNUNET_MessageHeader *) &msg[1];
3251 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3252 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3253 tunnel_send_multicast (t, &msg->header);
3255 t->path_refresh_task =
3256 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
3262 * Function to process paths received for a new peer addition. The recorded
3263 * paths form the initial tunnel, which can be optimized later.
3264 * Called on each result obtained for the DHT search.
3266 * @param cls closure
3267 * @param exp when will this value expire
3268 * @param key key of the result
3269 * @param type type of the result
3270 * @param size number of bytes in data
3271 * @param data pointer to the result data
3273 * TODO: re-issue the request after certain time? cancel after X results?
3276 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3277 const GNUNET_HashCode * key,
3278 const struct GNUNET_PeerIdentity *get_path,
3279 unsigned int get_path_length,
3280 const struct GNUNET_PeerIdentity *put_path,
3281 unsigned int put_path_length,
3282 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3284 struct MeshPathInfo *path_info = cls;
3285 struct MeshPeerPath *p;
3286 struct GNUNET_PeerIdentity pi;
3289 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3290 "MESH: Got results from DHT!\n");
3291 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3292 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3295 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3296 // path_info->peer->dhtget = NULL;
3298 p = path_build_from_dht (get_path, get_path_length,
3299 put_path, put_path_length);
3300 path_add_to_peer (path_info->peer, p, GNUNET_NO);
3301 for (i = 0; i < path_info->peer->ntunnels; i++)
3303 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3304 peer_info_connect(path_info->peer, path_info->t);
3306 // GNUNET_free (path_info);
3313 * Function to process paths received for a new peer addition. The recorded
3314 * paths form the initial tunnel, which can be optimized later.
3315 * Called on each result obtained for the DHT search.
3317 * @param cls closure
3318 * @param exp when will this value expire
3319 * @param key key of the result
3320 * @param type type of the result
3321 * @param size number of bytes in data
3322 * @param data pointer to the result data
3325 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3326 const GNUNET_HashCode * key,
3327 const struct GNUNET_PeerIdentity *get_path,
3328 unsigned int get_path_length,
3329 const struct GNUNET_PeerIdentity *put_path,
3330 unsigned int put_path_length,
3331 enum GNUNET_BLOCK_Type type, size_t size,
3334 const struct GNUNET_PeerIdentity *pi = data;
3335 struct MeshTunnel *t = cls;
3336 struct MeshPeerInfo *peer_info;
3337 struct MeshPeerPath *p;
3339 if (size != sizeof (struct GNUNET_PeerIdentity))
3341 GNUNET_break_op (0);
3344 GNUNET_assert (NULL != t->client);
3345 peer_info = peer_info_get (pi);
3346 (void) GNUNET_CONTAINER_multihashmap_put (
3350 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3352 p = path_build_from_dht (get_path, get_path_length,
3353 put_path, put_path_length);
3354 path_add_to_peer (peer_info, p, GNUNET_NO);
3355 tunnel_add_peer(t, peer_info);
3356 peer_info_connect (peer_info, t);
3360 /******************************************************************************/
3361 /********************* MESH LOCAL HANDLES **************************/
3362 /******************************************************************************/
3366 * Handler for client disconnection
3368 * @param cls closure
3369 * @param client identification of the client; NULL
3370 * for the last call when the server is destroyed
3373 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3375 struct MeshClient *c;
3376 struct MeshClient *next;
3378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3387 if (c->handle != client && NULL != client)
3389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3394 GNUNET_SERVER_client_drop (c->handle);
3395 if (NULL != c->tunnels)
3397 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3398 &tunnel_destroy_iterator,
3400 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3403 /* deregister clients applications */
3404 if (NULL != c->apps)
3406 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3407 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3409 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3410 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3412 GNUNET_SCHEDULER_cancel (announce_applications_task);
3413 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3415 if (NULL != c->types)
3416 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3418 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3430 * Handler for new clients
3432 * @param cls closure
3433 * @param client identification of the client
3434 * @param message the actual message, which includes messages the client wants
3437 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3438 const struct GNUNET_MessageHeader *message)
3440 struct GNUNET_MESH_ClientConnect *cc_msg;
3441 struct MeshClient *c;
3442 GNUNET_MESH_ApplicationType *a;
3449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3450 /* Check data sanity */
3451 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3452 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3453 ntypes = ntohs (cc_msg->types);
3454 napps = ntohs (cc_msg->applications);
3456 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3459 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3463 /* Create new client structure */
3464 c = GNUNET_malloc (sizeof (struct MeshClient));
3466 c->id = next_client_id++;
3468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3470 GNUNET_SERVER_client_keep (client);
3471 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3474 GNUNET_MESH_ApplicationType at;
3477 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3478 for (i = 0; i < napps; i++)
3481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3482 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3483 /* store in clients hashmap */
3484 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3485 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3486 /* store in global hashmap, for announcements */
3487 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3488 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3490 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3491 announce_applications_task =
3492 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3500 t = (uint16_t *) & a[napps];
3501 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3502 for (i = 0; i < ntypes; i++)
3505 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3507 /* store in clients hashmap */
3508 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3509 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3510 /* store in global hashmap */
3511 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3512 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3516 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3518 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3519 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3520 GNUNET_SERVER_notification_context_add (nc, client);
3522 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3530 * Handler for requests of new tunnels
3532 * @param cls closure
3533 * @param client identification of the client
3534 * @param message the actual message
3537 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3538 const struct GNUNET_MessageHeader *message)
3540 struct GNUNET_MESH_TunnelMessage *t_msg;
3541 struct MeshTunnel *t;
3542 struct MeshClient *c;
3543 GNUNET_HashCode hash;
3545 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3547 /* Sanity check for client registration */
3548 if (NULL == (c = client_get (client)))
3551 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3558 /* Message sanity check */
3559 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3562 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3566 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3567 /* Sanity check for tunnel numbering */
3568 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3571 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3574 /* Sanity check for duplicate tunnel IDs */
3575 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3578 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3582 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3583 while (NULL != tunnel_get_by_pi (myid, next_tid))
3584 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3585 t->id.tid = next_tid++;
3586 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3588 t->local_tid = ntohl (t_msg->tunnel_id);
3590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3591 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3592 GNUNET_i2s (&my_full_id),
3597 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3599 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3601 GNUNET_CONTAINER_multihashmap_put (
3602 c->tunnels, &hash, t,
3603 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3606 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3610 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3612 GNUNET_CONTAINER_multihashmap_put (
3614 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3617 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3620 t->tree = tree_new (myid);
3621 tree_set_me(t->tree, myid);
3623 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3629 * Handler for requests of deleting tunnels
3631 * @param cls closure
3632 * @param client identification of the client
3633 * @param message the actual message
3636 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3637 const struct GNUNET_MessageHeader *message)
3639 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3640 struct MeshClient *c;
3641 struct MeshTunnel *t;
3642 MESH_TunnelNumber tid;
3643 GNUNET_HashCode hash;
3645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3646 "MESH: Got a DESTROY TUNNEL from client!\n");
3648 /* Sanity check for client registration */
3649 if (NULL == (c = client_get (client)))
3652 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3655 /* Message sanity check */
3656 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3659 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3665 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3667 /* Retrieve tunnel */
3668 tid = ntohl (tunnel_msg->tunnel_id);
3670 /* Remove from local id hashmap */
3671 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3672 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3673 GNUNET_assert (GNUNET_YES ==
3674 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t));
3677 tunnel_send_destroy (t);
3679 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3685 * Handler for connection requests to new peers
3687 * @param cls closure
3688 * @param client identification of the client
3689 * @param message the actual message (PeerControl)
3692 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3693 const struct GNUNET_MessageHeader *message)
3695 struct GNUNET_MESH_PeerControl *peer_msg;
3696 struct MeshPeerInfo *peer_info;
3697 struct MeshClient *c;
3698 struct MeshTunnel *t;
3699 MESH_TunnelNumber tid;
3701 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3702 /* Sanity check for client registration */
3703 if (NULL == (c = client_get (client)))
3706 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3710 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3711 /* Sanity check for message size */
3712 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3715 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3719 /* Tunnel exists? */
3720 tid = ntohl (peer_msg->tunnel_id);
3721 t = tunnel_get_by_local_id (c, tid);
3725 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3729 /* Does client own tunnel? */
3730 if (t->client->handle != client)
3733 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3736 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3737 GNUNET_i2s(&peer_msg->peer));
3738 peer_info = peer_info_get (&peer_msg->peer);
3740 tunnel_add_peer(t, peer_info);
3741 peer_info_connect(peer_info, t);
3743 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3749 * Handler for disconnection requests of peers in a tunnel
3751 * @param cls closure
3752 * @param client identification of the client
3753 * @param message the actual message (PeerControl)
3756 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3757 const struct GNUNET_MessageHeader *message)
3759 struct GNUNET_MESH_PeerControl *peer_msg;
3760 struct MeshPeerInfo *peer_info;
3761 struct MeshClient *c;
3762 struct MeshTunnel *t;
3763 MESH_TunnelNumber tid;
3765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3766 /* Sanity check for client registration */
3767 if (NULL == (c = client_get (client)))
3770 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3773 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3774 /* Sanity check for message size */
3775 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3778 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3782 /* Tunnel exists? */
3783 tid = ntohl (peer_msg->tunnel_id);
3784 t = tunnel_get_by_local_id (c, tid);
3788 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3793 /* Does client own tunnel? */
3794 if (t->client->handle != client)
3797 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3802 "MESH: for peer %s\n",
3803 GNUNET_i2s(&peer_msg->peer));
3804 /* Is the peer in the tunnel? */
3805 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3806 &peer_msg->peer.hashPubKey);
3807 if (NULL == peer_info)
3810 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3814 /* Ok, delete peer from tunnel */
3815 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3816 &peer_msg->peer.hashPubKey);
3818 send_destroy_path (t, peer_info->id);
3819 tunnel_delete_peer(t, peer_info->id);
3820 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3826 * Handler for connection requests to new peers by type
3828 * @param cls closure
3829 * @param client identification of the client
3830 * @param message the actual message (ConnectPeerByType)
3833 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3834 const struct GNUNET_MessageHeader *message)
3836 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3837 struct MeshClient *c;
3838 struct MeshTunnel *t;
3839 GNUNET_HashCode hash;
3840 MESH_TunnelNumber tid;
3842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3843 /* Sanity check for client registration */
3844 if (NULL == (c = client_get (client)))
3847 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3851 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3852 /* Sanity check for message size */
3853 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3854 ntohs (connect_msg->header.size))
3857 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3861 /* Tunnel exists? */
3862 tid = ntohl (connect_msg->tunnel_id);
3863 t = tunnel_get_by_local_id (c, tid);
3867 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3871 /* Does client own tunnel? */
3872 if (t->client->handle != client)
3875 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3879 /* Do WE have the service? */
3880 t->type = ntohl (connect_msg->type);
3881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3882 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3883 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3886 /* Yes! Fast forward, add ourselves to the tunnel and send the
3887 * good news to the client
3889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3890 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3891 peer_info_get (&my_full_id),
3892 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3895 send_client_peer_connected(t, myid);
3896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3897 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3900 /* Ok, lets find a peer offering the service */
3901 if (NULL != t->dht_get_type)
3903 GNUNET_DHT_get_stop (t->dht_get_type);
3905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3906 GNUNET_h2s (&hash));
3908 GNUNET_DHT_get_start (dht_handle,
3909 GNUNET_TIME_UNIT_FOREVER_REL,
3910 GNUNET_BLOCK_TYPE_TEST,
3913 GNUNET_DHT_RO_RECORD_ROUTE |
3914 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3916 &dht_get_type_handler, t);
3918 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3924 * Handler for client traffic directed to one peer
3926 * @param cls closure
3927 * @param client identification of the client
3928 * @param message the actual message
3931 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3932 const struct GNUNET_MessageHeader *message)
3934 struct MeshClient *c;
3935 struct MeshTunnel *t;
3936 struct MeshPeerInfo *pi;
3937 struct GNUNET_MESH_Unicast *data_msg;
3938 MESH_TunnelNumber tid;
3941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3942 "MESH: Got a unicast request from a client!\n");
3944 /* Sanity check for client registration */
3945 if (NULL == (c = client_get (client)))
3948 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3951 data_msg = (struct GNUNET_MESH_Unicast *) message;
3952 /* Sanity check for message size */
3953 size = ntohs (message->size);
3954 if (sizeof (struct GNUNET_MESH_Unicast) +
3955 sizeof (struct GNUNET_MessageHeader) > size)
3958 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3962 /* Tunnel exists? */
3963 tid = ntohl (data_msg->tid);
3964 t = tunnel_get_by_local_id (c, tid);
3968 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3972 /* Is it a local tunnel? Then, does client own the tunnel? */
3973 if (NULL != t->client &&
3974 NULL != t->client->handle &&
3975 t->client->handle != client)
3978 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3982 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3983 &data_msg->destination.hashPubKey);
3984 /* Is the selected peer in the tunnel? */
3988 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3992 /* Ok, everything is correct, send the message
3993 * (pretend we got it from a mesh peer)
3996 char buf[ntohs (message->size)];
3997 struct GNUNET_MESH_Unicast *copy;
3999 /* Work around const limitation */
4000 copy = (struct GNUNET_MESH_Unicast *) buf;
4001 memcpy (buf, data_msg, size);
4002 copy->oid = my_full_id;
4003 copy->tid = htonl (t->id.tid);
4004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4005 "MESH: calling generic handler...\n");
4006 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
4008 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4014 * Handler for client traffic directed to the origin
4016 * @param cls closure
4017 * @param client identification of the client
4018 * @param message the actual message
4021 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4022 const struct GNUNET_MessageHeader *message)
4024 struct GNUNET_MESH_ToOrigin *data_msg;
4025 struct GNUNET_PeerIdentity id;
4026 struct MeshClient *c;
4027 struct MeshTunnel *t;
4028 MESH_TunnelNumber tid;
4031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4032 "MESH: Got a ToOrigin request from a client!\n");
4034 /* Sanity check for client registration */
4035 if (NULL == (c = client_get (client)))
4038 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4041 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4042 /* Sanity check for message size */
4043 size = ntohs (message->size);
4044 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4045 sizeof (struct GNUNET_MessageHeader) > size)
4048 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4052 /* Tunnel exists? */
4053 tid = ntohl (data_msg->tid);
4054 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4057 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4060 t = tunnel_get_by_local_id (c, tid);
4064 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4068 /* It shouldn't be a local tunnel. */
4069 if (NULL != t->client)
4072 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4075 GNUNET_PEER_resolve(t->id.oid, &id);
4077 /* Ok, everything is correct, send the message
4078 * (pretend we got it from a mesh peer)
4081 char buf[ntohs (message->size)];
4082 struct GNUNET_MESH_ToOrigin *copy;
4084 /* Work around const limitation */
4085 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4086 memcpy (buf, data_msg, size);
4088 copy->tid = htonl (t->id.tid);
4089 copy->sender = my_full_id;
4090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4091 "MESH: calling generic handler...\n");
4092 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
4094 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4100 * Handler for client traffic directed to all peers in a tunnel
4102 * @param cls closure
4103 * @param client identification of the client
4104 * @param message the actual message
4107 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
4108 const struct GNUNET_MessageHeader *message)
4110 struct MeshClient *c;
4111 struct MeshTunnel *t;
4112 struct GNUNET_MESH_Multicast *data_msg;
4113 MESH_TunnelNumber tid;
4115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4116 "MESH: Got a multicast request from a client!\n");
4118 /* Sanity check for client registration */
4119 if (NULL == (c = client_get (client)))
4122 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4125 data_msg = (struct GNUNET_MESH_Multicast *) message;
4126 /* Sanity check for message size */
4127 if (sizeof (struct GNUNET_MESH_Multicast) +
4128 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4131 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4135 /* Tunnel exists? */
4136 tid = ntohl (data_msg->tid);
4137 t = tunnel_get_by_local_id (c, tid);
4141 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4145 /* Does client own tunnel? */
4146 if (t->client->handle != client)
4149 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4154 char buf[ntohs(message->size)];
4155 struct GNUNET_MESH_Multicast *copy;
4157 copy = (struct GNUNET_MESH_Multicast *)buf;
4158 memcpy(buf, message, ntohs(message->size));
4159 copy->oid = my_full_id;
4160 copy->tid = htonl(t->id.tid);
4161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4162 "MESH: calling generic handler...\n");
4163 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4166 /* receive done gets called when last copy is sent to a neighbor */
4171 * Functions to handle messages from clients
4173 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4174 {&handle_local_new_client, NULL,
4175 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4176 {&handle_local_tunnel_create, NULL,
4177 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4178 sizeof (struct GNUNET_MESH_TunnelMessage)},
4179 {&handle_local_tunnel_destroy, NULL,
4180 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4181 sizeof (struct GNUNET_MESH_TunnelMessage)},
4182 {&handle_local_connect_add, NULL,
4183 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4184 sizeof (struct GNUNET_MESH_PeerControl)},
4185 {&handle_local_connect_del, NULL,
4186 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4187 sizeof (struct GNUNET_MESH_PeerControl)},
4188 {&handle_local_connect_by_type, NULL,
4189 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4190 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4191 {&handle_local_unicast, NULL,
4192 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4193 {&handle_local_to_origin, NULL,
4194 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4195 {&handle_local_multicast, NULL,
4196 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4202 * To be called on core init/fail.
4204 * @param cls service closure
4205 * @param server handle to the server for this service
4206 * @param identity the public identity of this peer
4209 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4210 const struct GNUNET_PeerIdentity *identity)
4212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4213 core_handle = server;
4214 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4216 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4217 GNUNET_SCHEDULER_shutdown();
4223 * Method called whenever a given peer connects.
4225 * @param cls closure
4226 * @param peer peer identity this notification is about
4227 * @param atsi performance data for the connection
4228 * @param atsi_count number of records in 'atsi'
4231 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4232 const struct GNUNET_ATS_Information *atsi,
4233 unsigned int atsi_count)
4235 struct MeshPeerInfo *peer_info;
4236 struct MeshPeerPath *path;
4238 #if MESH_DEBUG_CONNECTION
4239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4241 GNUNET_i2s(&my_full_id));
4243 peer_info = peer_info_get (peer);
4244 if (myid == peer_info->id)
4246 #if MESH_DEBUG_CONNECTION
4247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4251 #if MESH_DEBUG_CONNECTION
4254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4258 path = path_new (2);
4259 path->peers[0] = myid;
4260 path->peers[1] = peer_info->id;
4261 GNUNET_PEER_change_rc(myid, 1);
4262 GNUNET_PEER_change_rc(peer_info->id, 1);
4263 path_add_to_peer (peer_info, path, GNUNET_YES);
4268 * Method called whenever a peer disconnects.
4270 * @param cls closure
4271 * @param peer peer identity this notification is about
4274 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4276 struct MeshPeerInfo *pi;
4279 #if MESH_DEBUG_CONNECTION
4280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4282 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4288 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4290 /* TODO: notify that the transmission failed */
4291 peer_info_cancel_transmission(pi, i);
4293 path_remove_from_peer (pi, pi->id, myid);
4294 #if MESH_DEBUG_CONNECTION
4297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4304 /******************************************************************************/
4305 /************************ MAIN FUNCTIONS ****************************/
4306 /******************************************************************************/
4309 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4311 * @param cls closure
4312 * @param key current key code
4313 * @param value value in the hash map
4314 * @return GNUNET_YES if we should continue to iterate,
4318 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4320 struct MeshTunnel *t = value;
4326 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4328 * @param cls closure
4329 * @param key current key code
4330 * @param value value in the hash map
4331 * @return GNUNET_YES if we should continue to iterate,
4335 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4337 struct MeshPeerInfo *p = value;
4338 peer_info_destroy (p);
4343 * Task run during shutdown.
4349 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4352 /* TODO: destroy tunnels? */
4353 if (core_handle != NULL)
4355 GNUNET_CORE_disconnect (core_handle);
4358 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4359 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4360 if (dht_handle != NULL)
4362 GNUNET_DHT_disconnect (dht_handle);
4367 GNUNET_SERVER_notification_context_destroy (nc);
4370 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4372 GNUNET_SCHEDULER_cancel (announce_id_task);
4373 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4379 * Process mesh requests.
4381 * @param cls closure
4382 * @param server the initialized server
4383 * @param c configuration to use
4386 run (void *cls, struct GNUNET_SERVER_Handle *server,
4387 const struct GNUNET_CONFIGURATION_Handle *c)
4389 struct MeshPeerInfo *peer;
4390 struct MeshPeerPath *p;
4393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4394 server_handle = server;
4395 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4396 CORE_QUEUE_SIZE, /* queue size */
4397 NULL, /* Closure passed to MESH functions */
4398 &core_init, /* Call core_init once connected */
4399 &core_connect, /* Handle connects */
4400 &core_disconnect, /* remove peers on disconnects */
4401 NULL, /* Don't notify about all incoming messages */
4402 GNUNET_NO, /* For header only in notification */
4403 NULL, /* Don't notify about all outbound messages */
4404 GNUNET_NO, /* For header-only out notification */
4405 core_handlers); /* Register these handlers */
4407 if (core_handle == NULL)
4410 GNUNET_SCHEDULER_shutdown ();
4415 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4418 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4420 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4421 GNUNET_SCHEDULER_shutdown ();
4424 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4425 GNUNET_free (keyfile);
4426 if (my_private_key == NULL)
4428 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4429 _("Mesh service could not access hostkey. Exiting.\n"));
4430 GNUNET_SCHEDULER_shutdown ();
4433 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4434 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4435 &my_full_id.hashPubKey);
4436 myid = GNUNET_PEER_intern (&my_full_id);
4438 // // transport_handle = GNUNET_TRANSPORT_connect(c,
4445 dht_handle = GNUNET_DHT_connect (c, 64);
4446 if (dht_handle == NULL)
4452 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4454 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4455 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4456 peers = GNUNET_CONTAINER_multihashmap_create (32);
4457 applications = GNUNET_CONTAINER_multihashmap_create (32);
4458 types = GNUNET_CONTAINER_multihashmap_create (32);
4460 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4461 nc = GNUNET_SERVER_notification_context_create (server_handle,
4463 GNUNET_SERVER_disconnect_notify (server_handle,
4464 &handle_local_client_disconnect,
4469 clients_tail = NULL;
4474 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4475 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4477 /* Create a peer_info for the local peer */
4478 peer = peer_info_get(&my_full_id);
4481 GNUNET_PEER_change_rc (myid, 1);
4482 path_add_to_peer(peer, p, GNUNET_YES);
4484 /* Scheduled the task to clean up when shutdown is called */
4485 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4492 * The main function for the mesh service.
4494 * @param argc number of arguments from the command line
4495 * @param argv command line arguments
4496 * @return 0 ok, 1 on error
4499 main (int argc, char *const *argv)
4503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4506 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");