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 /******************************************************************************/
73 /************************ DATA STRUCTURES ****************************/
74 /******************************************************************************/
76 /** FWD declaration */
80 * Struct containing all info possibly needed to build a package when called
83 struct MeshDataDescriptor
85 /** ID of the tunnel this packet travels in */
86 struct MESH_TunnelID *origin;
91 /** Client that asked for the transmission, if any */
92 struct GNUNET_SERVER_Client *client;
94 /** Who was this message being sent to */
95 struct MeshPeerInfo *peer;
97 /** Ultimate destination of the packet */
98 GNUNET_PEER_Id destination;
100 /** Number of identical messages sent to different hops (multicast) */
101 unsigned int *copies;
103 /** Which handler was used to request the transmission */
104 unsigned int handler_n;
106 /** Size of the data */
109 /** Used to allow a client send more traffic to the service after a
110 * previous packet was tried to be sent to a neighbor and couldn't */
111 GNUNET_SCHEDULER_TaskIdentifier *timeout_task;
116 * Struct containing all information regarding a given peer
126 * Last time we heard from this peer
128 struct GNUNET_TIME_Absolute last_contact;
131 * Number of attempts to reconnect so far
133 int n_reconnect_attempts;
136 * Paths to reach the peer, ordered by ascending hop count
138 struct MeshPeerPath *path_head;
141 * Paths to reach the peer, ordered by ascending hop count
143 struct MeshPeerPath *path_tail;
146 * Handle to stop the DHT search for a path to this peer
148 struct GNUNET_DHT_GetHandle *dhtget;
151 * Closure given to the DHT GET
153 struct MeshPathInfo *dhtgetcls;
156 * Handles to stop queued transmissions for this peer
158 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
161 * Pointer to info stuctures used as cls for queued transmissions
163 void *infos[CORE_QUEUE_SIZE];
166 * Type of message being in each transmission
168 uint16_t types[CORE_QUEUE_SIZE];
171 * Array of tunnels this peer participates in
172 * (most probably a small amount, therefore not a hashmap)
173 * When the path to the peer changes, notify these tunnels to let them
174 * re-adjust their path trees.
176 struct MeshTunnel **tunnels;
179 * Number of tunnels this peers participates in
181 unsigned int ntunnels;
186 * Data scheduled to transmit (to local client or remote peer)
193 struct MeshQueue *next;
194 struct MeshQueue *prev;
197 * Target of the data (NULL if target is client)
199 struct MeshPeerInfo *peer;
202 * Client to send the data to (NULL if target is peer)
204 struct MeshClient *client;
207 * Size of the message to transmit
212 * How old is the data?
214 struct GNUNET_TIME_Absolute timestamp;
219 struct GNUNET_MessageHeader *data;
223 * Globally unique tunnel identification (owner + number)
224 * DO NOT USE OVER THE NETWORK
229 * Node that owns the tunnel
234 * Tunnel number to differentiate all the tunnels owned by the node oid
235 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
237 MESH_TunnelNumber tid;
241 struct MeshClient; /* FWD declaration */
244 * Struct containing all information regarding a tunnel
245 * For an intermediate node the improtant info used will be:
246 * - id Tunnel unique identification
247 * - paths[0] To know where to send it next
248 * - metainfo: ready, speeds, accounting
255 struct MESH_TunnelID id;
258 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
260 MESH_TunnelNumber local_tid;
263 * Last time the tunnel was used
265 struct GNUNET_TIME_Absolute timestamp;
268 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
269 * containing peers added by id or by type, not intermediate peers.
271 struct GNUNET_CONTAINER_MultiHashMap *peers;
274 * Number of peers that are connected and potentially ready to receive data
276 unsigned int peers_ready;
279 * Number of peers that have been added to the tunnel
281 unsigned int peers_total;
284 * Client owner of the tunnel, if any
286 struct MeshClient *client;
289 * Messages ready to transmit
291 struct MeshQueue *queue_head;
292 struct MeshQueue *queue_tail;
297 struct MeshTunnelTree *tree;
300 * Application type we are looking for in this tunnel
302 GNUNET_MESH_ApplicationType type;
305 * Used to search peers offering a service
307 struct GNUNET_DHT_GetHandle *dht_get_type;
310 * Task to keep the used paths alive
312 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
315 * Task to destroy the tunnel after timeout
317 * FIXME: merge the two? a tunnel will have either
318 * a path refresh OR a timeout, never both!
320 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
325 * Info needed to work with tunnel paths and peers
332 struct MeshTunnel *t;
335 * Neighbouring peer to whom we send the packet to
337 struct MeshPeerInfo *peer;
342 struct MeshPeerPath *path;
345 * Position in peer's transmit queue
352 * Struct containing information about a client of the service
359 struct MeshClient *next;
360 struct MeshClient *prev;
363 * Tunnels that belong to this client, indexed by local id
365 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
368 * Handle to communicate with the client
370 struct GNUNET_SERVER_Client *handle;
373 * Applications that this client has claimed to provide
375 struct GNUNET_CONTAINER_MultiHashMap *apps;
378 * Messages that this client has declared interest in
380 struct GNUNET_CONTAINER_MultiHashMap *types;
384 * ID of the client, for debug messages
393 /******************************************************************************/
394 /************************ DEBUG FUNCTIONS ****************************/
395 /******************************************************************************/
399 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
400 * @param cls string to print
401 * @param tc task context
404 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
408 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
416 /******************************************************************************/
417 /*********************** GLOBAL VARIABLES ****************************/
418 /******************************************************************************/
423 static struct MeshClient *clients;
424 static struct MeshClient *clients_tail;
427 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
429 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
432 * Tunnels incoming, indexed by MESH_TunnelNumber
433 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
435 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
438 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
440 static struct GNUNET_CONTAINER_MultiHashMap *peers;
443 * Handle to communicate with core
445 static struct GNUNET_CORE_Handle *core_handle;
448 * Handle to communicate with transport
450 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
455 static struct GNUNET_DHT_Handle *dht_handle;
460 static struct GNUNET_SERVER_Handle *server_handle;
463 * Notification context, to send messages to local clients
465 static struct GNUNET_SERVER_NotificationContext *nc;
468 * Local peer own ID (memory efficient handle)
470 static GNUNET_PEER_Id myid;
473 * Local peer own ID (full value)
475 static struct GNUNET_PeerIdentity my_full_id;
480 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
485 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
488 * Tunnel ID for the next created tunnel (global tunnel number)
490 static MESH_TunnelNumber next_tid;
493 * Tunnel ID for the next incoming tunnel (local tunnel number)
495 static MESH_TunnelNumber next_local_tid;
498 * All application types provided by this peer
500 static struct GNUNET_CONTAINER_MultiHashMap *applications;
503 * All message types clients of this peer are interested in
505 static struct GNUNET_CONTAINER_MultiHashMap *types;
508 * Task to periodically announce provided applications
510 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
513 * Task to periodically announce itself in the network
515 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
518 unsigned int next_client_id;
522 /******************************************************************************/
523 /************************ ITERATORS ****************************/
524 /******************************************************************************/
526 /* FIXME move iterators here */
529 /******************************************************************************/
530 /************************ PERIODIC FUNCTIONS ****************************/
531 /******************************************************************************/
534 * Announce iterator over for each application provided by the peer
537 * @param key current key code
538 * @param value value in the hash map
539 * @return GNUNET_YES if we should continue to
544 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
546 /* FIXME are hashes in multihash map equal on all aquitectures? */
547 GNUNET_DHT_put (dht_handle,
550 GNUNET_DHT_RO_RECORD_ROUTE |
551 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
552 GNUNET_BLOCK_TYPE_TEST,
553 sizeof (struct GNUNET_PeerIdentity),
554 (const char *) &my_full_id,
556 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
557 &mesh_debug, "DHT_put for app completed");
559 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
561 APP_ANNOUNCE_TIME, NULL, NULL);
568 * Periodically announce what applications are provided by local clients
571 * @param tc task context
574 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
576 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
578 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
582 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
584 announce_applications_task =
585 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
593 * Periodically announce self id in the DHT
596 * @param tc task context
599 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
601 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
603 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
607 * - Set data expiration in function of X
610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
611 GNUNET_i2s (&my_full_id));
612 GNUNET_DHT_put (dht_handle, /* DHT handle */
613 &my_full_id.hashPubKey, /* Key to use */
614 10U, /* Replication level */
615 GNUNET_DHT_RO_RECORD_ROUTE |
616 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
617 GNUNET_BLOCK_TYPE_TEST, /* Block type */
618 sizeof(my_full_id), /* Size of the data */
619 (char *)&my_full_id, /* Data itself */
620 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
621 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
623 &mesh_debug, "DHT_put for id completed");
625 NULL, /* Continuation */
626 NULL); /* Continuation closure */
629 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
634 * Function to process paths received for a new peer addition. The recorded
635 * paths form the initial tunnel, which can be optimized later.
636 * Called on each result obtained for the DHT search.
639 * @param exp when will this value expire
640 * @param key key of the result
641 * @param type type of the result
642 * @param size number of bytes in data
643 * @param data pointer to the result data
646 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
647 const GNUNET_HashCode * key,
648 const struct GNUNET_PeerIdentity *get_path,
649 unsigned int get_path_length,
650 const struct GNUNET_PeerIdentity *put_path,
651 unsigned int put_path_length,
652 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
655 /******************************************************************************/
656 /****************** GENERAL HELPER FUNCTIONS ************************/
657 /******************************************************************************/
660 * Check if client has registered with the service and has not disconnected
662 * @param client the client to check
664 * @return non-NULL if client exists in the global DLL
666 static struct MeshClient *
667 client_get (struct GNUNET_SERVER_Client *client)
669 struct MeshClient *c;
674 if (c->handle == client)
683 * Checks if a given client has subscribed to certain message type
685 * @param message_type Type of message to check
686 * @param c Client to check
688 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
693 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
697 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
698 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
703 * Allow a client to send more data after transmitting a multicast message
704 * which some neighbor has not yet accepted altough a reasonable time has
707 * @param cls Closure (DataDescriptor containing the task identifier)
708 * @param tc Task Context
711 client_allow_send(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
713 struct MeshDataDescriptor *info = cls;
715 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
718 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
719 "MESH: CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
722 *(info->timeout_task) = GNUNET_SCHEDULER_NO_TASK;
723 GNUNET_SERVER_receive_done(info->client, GNUNET_OK);
728 * Search for a tunnel by global ID using full PeerIdentities
730 * @param oid owner of the tunnel
731 * @param tid global tunnel number
733 * @return tunnel handler, NULL if doesn't exist
735 static struct MeshTunnel *
736 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
740 * Notify a tunnel that a connection has broken that affects at least
743 * @param t Tunnel affected.
744 * @param p1 Peer that got disconnected from p2.
745 * @param p2 Peer that got disconnected from p1.
747 * @return Short ID of the peer disconnected (either p1 or p2).
748 * 0 if the tunnel remained unaffected.
750 static GNUNET_PEER_Id
751 tunnel_notify_connection_broken (struct MeshTunnel *t,
757 * Send the message to all clients that have subscribed to its type
759 * @param msg Pointer to the message itself
760 * @return number of clients this message was sent to
763 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
764 const struct GNUNET_MessageHeader *payload)
766 struct GNUNET_PeerIdentity *oid;
767 struct MeshClient *c;
768 struct MeshTunnel *t;
769 MESH_TunnelNumber *tid;
772 char cbuf[htons(msg->size)];
774 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Sending to clients...\n");
775 type = ntohs (payload->type);
776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message of type %u\n", type);
778 memcpy (cbuf, msg, sizeof(cbuf));
779 switch (htons(msg->type))
781 struct GNUNET_MESH_Unicast *uc;
782 struct GNUNET_MESH_Multicast *mc;
783 struct GNUNET_MESH_ToOrigin *to;
785 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
786 uc = (struct GNUNET_MESH_Unicast *) cbuf;
790 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
791 mc = (struct GNUNET_MESH_Multicast *) cbuf;
795 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
796 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
804 t = tunnel_get (oid, ntohl(*tid));
810 *tid = htonl (t->local_tid);
811 for (count = 0, c = clients; c != NULL; c = c->next)
813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client %u\n", c->id);
814 if (client_is_subscribed (type, c))
817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending\n");
818 GNUNET_SERVER_notification_context_unicast (
821 (struct GNUNET_MessageHeader *) cbuf,
830 * Notify the client that owns the tunnel that a peer has connected to it
831 * (the requested path to it has been confirmed).
833 * @param t Tunnel whose owner to notify
834 * @param id Short id of the peer that has connected
837 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
839 struct GNUNET_MESH_PeerControl pc;
841 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
842 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
843 pc.tunnel_id = htonl (t->local_tid);
844 GNUNET_PEER_resolve (id, &pc.peer);
845 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
846 &pc.header, GNUNET_NO);
851 * Notify all clients (not depending on registration status) that the incoming
852 * tunnel is no longer valid.
854 * @param t Tunnel that was destroyed.
857 send_clients_tunnel_destroy (struct MeshTunnel *t)
859 struct GNUNET_MESH_TunnelMessage msg;
861 msg.header.size = htons (sizeof (msg));
862 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
863 msg.tunnel_id = htonl (t->local_tid);
864 GNUNET_SERVER_notification_context_broadcast(nc, &msg.header, GNUNET_NO);
869 * Function called to notify a client about the socket
870 * being ready to queue more data. "buf" will be
871 * NULL and "size" zero if the socket was closed for
872 * writing in the meantime.
875 * @param size number of bytes available in buf
876 * @param buf where the callee should write the message
877 * @return number of bytes written to buf
880 send_core_create_path (void *cls, size_t size, void *buf);
884 * Function called to notify a client about the socket
885 * being ready to queue more data. "buf" will be
886 * NULL and "size" zero if the socket was closed for
887 * writing in the meantime.
889 * @param cls closure (data itself)
890 * @param size number of bytes available in buf
891 * @param buf where the callee should write the message
893 * @return number of bytes written to buf
896 send_core_data_multicast (void *cls, size_t size, void *buf);
900 * Decrements the reference counter and frees all resources if needed
902 * @param dd Data Descriptor used in a multicast message
905 data_descriptor_decrement_multicast (struct MeshDataDescriptor *dd)
907 if (0 == --(*(dd->copies)))
909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
910 if (NULL != dd->client)
912 if (GNUNET_SCHEDULER_NO_TASK != *(dd->timeout_task))
914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
915 "MESH: cancelling client timeout (%u)...\n",
916 *(dd->timeout_task));
917 GNUNET_SCHEDULER_cancel(*(dd->timeout_task));
918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
919 GNUNET_SERVER_receive_done (dd->client, GNUNET_OK);
921 GNUNET_free (dd->timeout_task);
923 GNUNET_free (dd->copies);
924 GNUNET_free (dd->data);
930 * Cancel a core transmission that was already requested and free all resources
931 * associated to the request.
933 * @param peer PeeInfo of the peer whose transmission is cancelled.
934 * @param i Position of the transmission to be cancelled.
937 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
939 if (NULL != peer->core_transmit[i])
941 struct MeshDataDescriptor *dd;
942 struct MeshPathInfo *path_info;
946 struct GNUNET_PeerIdentity id;
948 GNUNET_PEER_resolve (peer->id, &id);
949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
950 "MESH: Cancelling data transmission at %s [%u]\n",
953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
954 "MESH: message type %u\n",
958 /* TODO: notify that tranmission has failed */
959 switch (peer->types[i])
961 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
962 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
963 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
966 data_descriptor_decrement_multicast (dd);
968 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
970 path_info = peer->infos[i];
971 path_destroy(path_info->path);
975 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
977 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
978 peer->core_transmit[i] = NULL;
979 GNUNET_free (peer->infos[i]);
985 * Get a unused CORE slot to transmit a message to a peer. If all the slots
986 * are used, cancel one and return it's position.
988 * @param peer PeerInfo of the neighbor we want to transmit to.
990 * @return The index of an available slot to transmit to the neighbor.
993 peer_info_transmit_slot (struct MeshPeerInfo *peer)
997 for (i = 0; peer->core_transmit[i]; i++)
999 if (i == (CORE_QUEUE_SIZE - 1))
1001 /* All positions are taken! Overwriting! */
1003 peer_info_cancel_transmission(peer, 0);
1012 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1013 * and insert it in the appropiate structures if the peer is not known yet.
1015 * @param peer Full identity of the peer.
1017 * @return Existing or newly created peer info.
1019 static struct MeshPeerInfo *
1020 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1022 struct MeshPeerInfo *peer_info;
1024 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1025 if (NULL == peer_info)
1028 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1029 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1030 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1031 peer_info->id = GNUNET_PEER_intern (peer);
1039 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1040 * and insert it in the appropiate structures if the peer is not known yet.
1042 * @param peer Short identity of the peer.
1044 * @return Existing or newly created peer info.
1046 static struct MeshPeerInfo *
1047 peer_info_get_short (const GNUNET_PEER_Id peer)
1049 struct GNUNET_PeerIdentity id;
1051 GNUNET_PEER_resolve(peer, &id);
1052 return peer_info_get(&id);
1057 * Iterator to remove the tunnel from the list of tunnels a peer participates
1060 * @param cls Closure (tunnel info)
1061 * @param key GNUNET_PeerIdentity of the peer (unused)
1062 * @param value PeerInfo of the peer
1064 * @return always GNUNET_YES, to keep iterating
1067 peer_info_delete_tunnel (void* cls, const GNUNET_HashCode* key, void* value)
1069 struct MeshTunnel *t = cls;
1070 struct MeshPeerInfo *peer = value;
1073 for (i = 0; i < peer->ntunnels; i++)
1075 if (0 == memcmp(&peer->tunnels[i]->id,
1077 sizeof(struct MESH_TunnelID)))
1080 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1081 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1090 * Core callback to write a
1092 * @param cls Closure (MeshDataDescriptor with data in "data" member).
1093 * @param size Number of bytes available in buf.
1094 * @param buf Where the to write the message.
1096 * @return number of bytes written to buf
1099 send_core_data_raw (void *cls, size_t size, void *buf)
1101 struct MeshDataDescriptor *info = cls;
1102 struct GNUNET_MessageHeader *msg;
1105 GNUNET_assert (NULL != info);
1106 GNUNET_assert (NULL != info->data);
1107 msg = (struct GNUNET_MessageHeader *) info->data;
1108 total_size = ntohs (msg->size);
1110 if (total_size > size)
1112 struct GNUNET_PeerIdentity id;
1114 GNUNET_PEER_resolve (info->peer->id, &id);
1115 info->peer->core_transmit[info->handler_n] =
1116 GNUNET_CORE_notify_transmit_ready(core_handle,
1119 GNUNET_TIME_UNIT_FOREVER_REL,
1122 &send_core_data_raw,
1126 info->peer->core_transmit[info->handler_n] = NULL;
1127 memcpy (buf, msg, total_size);
1128 GNUNET_free (info->data);
1135 * Sends an already built message to a peer, properly registrating
1136 * all used resources.
1138 * @param message Message to send. Fucntion makes a copy of it.
1139 * @param peer Short ID of the neighbor whom to send the message.
1142 send_message (const struct GNUNET_MessageHeader *message,
1143 const struct GNUNET_PeerIdentity *peer)
1145 struct MeshDataDescriptor *info;
1146 struct MeshPeerInfo *neighbor;
1147 struct MeshPeerPath *p;
1151 // GNUNET_TRANSPORT_try_connect();
1153 size = ntohs (message->size);
1154 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1155 info->data = GNUNET_malloc (size);
1156 memcpy (info->data, message, size);
1157 neighbor = peer_info_get (peer);
1158 for (p = neighbor->path_head; NULL != p; p = p->next)
1170 i = peer_info_transmit_slot (neighbor);
1171 info->handler_n = i;
1172 info->peer = neighbor;
1173 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1174 neighbor->infos[i] = info;
1175 neighbor->core_transmit[i] =
1176 GNUNET_CORE_notify_transmit_ready(core_handle,
1179 GNUNET_TIME_UNIT_FOREVER_REL,
1182 &send_core_data_raw,
1189 * Sends a CREATE PATH message for a path to a peer, properly registrating
1190 * all used resources.
1192 * @param peer PeerInfo of the final peer for whom this path is being created.
1193 * @param p Path itself.
1194 * @param t Tunnel for which the path is created.
1197 send_create_path (struct MeshPeerInfo *peer,
1198 struct MeshPeerPath *p,
1199 struct MeshTunnel *t)
1201 struct GNUNET_PeerIdentity id;
1202 struct MeshPathInfo *path_info;
1203 struct MeshPeerInfo *neighbor;
1208 p = tree_get_path_to_peer(t->tree, peer->id);
1215 for (i = 0; i < p->length; i++)
1217 if (p->peers[i] == myid)
1220 if (i >= p->length - 1)
1226 GNUNET_PEER_resolve(p->peers[i + 1], &id);
1228 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1229 path_info->path = p;
1231 neighbor = peer_info_get(&id);
1232 path_info->peer = neighbor;
1233 path_info->pos = peer_info_transmit_slot(neighbor);
1234 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1235 neighbor->infos[path_info->pos] = path_info;
1236 neighbor->core_transmit[path_info->pos] =
1237 GNUNET_CORE_notify_transmit_ready (
1238 core_handle, /* handle */
1241 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1243 sizeof (struct GNUNET_MESH_ManipulatePath)
1244 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1245 &send_core_create_path, /* callback */
1246 path_info); /* cls */
1251 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1253 * @param t Tunnel whose path to destroy.
1254 * @param destination Short ID of the peer to whom the path to destroy.
1257 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1259 struct MeshPeerPath *p;
1262 p = tree_get_path_to_peer(t->tree, destination);
1268 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1269 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1271 struct GNUNET_MESH_ManipulatePath *msg;
1272 struct GNUNET_PeerIdentity *pi;
1276 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1277 msg->header.size = htons (size);
1278 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1279 msg->tid = htonl (t->id.tid);
1280 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1281 for (i = 0; i < p->length; i++)
1283 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1285 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1292 * Try to establish a new connection to this peer.
1293 * Use the best path for the given tunnel.
1294 * If the peer doesn't have any path to it yet, try to get one.
1295 * If the peer already has some path, send a CREATE PATH towards it.
1297 * @param peer PeerInfo of the peer.
1298 * @param t Tunnel for which to create the path, if possible.
1301 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1303 struct MeshPeerPath *p;
1304 struct MeshPathInfo *path_info;
1306 if (NULL != peer->path_head)
1308 p = tree_get_path_to_peer(t->tree, peer->id);
1317 send_create_path(peer, p, t);
1322 send_client_peer_connected(t, myid);
1325 else if (NULL == peer->dhtget)
1327 struct GNUNET_PeerIdentity id;
1329 GNUNET_PEER_resolve(peer->id, &id);
1330 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1331 path_info->peer = peer;
1333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1334 "MESH: Starting DHT GET for peer %s\n",
1336 peer->dhtgetcls = path_info;
1338 GNUNET_DHT_get_start(dht_handle, /* handle */
1339 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1340 GNUNET_BLOCK_TYPE_TEST, /* type */
1341 &id.hashPubKey, /* key to search */
1342 4, /* replication level */
1343 GNUNET_DHT_RO_RECORD_ROUTE |
1344 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1346 0, /* xquery bits */
1347 &dht_get_id_handler,
1350 /* Otherwise, there is no path but the DHT get is already started. */
1355 * Task to delay the connection of a peer
1357 * @param cls Closure (path info with tunnel and peer to connect).
1358 * Will be free'd on exection.
1359 * @param tc TaskContext
1362 peer_info_connect_task (void *cls,
1363 const struct GNUNET_SCHEDULER_TaskContext *tc)
1365 struct MeshPathInfo *path_info = cls;
1367 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1372 peer_info_connect (path_info->peer, path_info->t);
1378 * Destroy the peer_info and free any allocated resources linked to it
1380 * @param pi The peer_info to destroy.
1382 * @return GNUNET_OK on success
1385 peer_info_destroy (struct MeshPeerInfo *pi)
1387 struct GNUNET_PeerIdentity id;
1388 struct MeshPeerPath *p;
1389 struct MeshPeerPath *nextp;
1392 GNUNET_PEER_resolve (pi->id, &id);
1393 GNUNET_PEER_change_rc (pi->id, -1);
1396 GNUNET_CONTAINER_multihashmap_remove (peers,&id.hashPubKey, pi))
1399 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1400 "MESH: removing peer %s, not in hashmap\n",
1403 if (NULL != pi->dhtget)
1405 GNUNET_DHT_get_stop(pi->dhtget);
1406 GNUNET_free (pi->dhtgetcls);
1408 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1410 peer_info_cancel_transmission(pi, i);
1416 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1426 * Remove all paths that rely on a direct connection between p1 and p2
1427 * from the peer itself and notify all tunnels about it.
1429 * @param peer PeerInfo of affected peer.
1430 * @param p1 GNUNET_PEER_Id of one peer.
1431 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1434 * TODO: optimize (see below)
1437 path_remove_from_peer (struct MeshPeerInfo *peer,
1441 struct MeshPeerPath *p;
1442 struct MeshPeerPath *aux;
1443 struct MeshPeerInfo *peer_d;
1445 unsigned int destroyed;
1451 p = peer->path_head;
1455 for (i = 0; i < (p->length - 1); i++)
1457 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1458 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1460 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1471 for (i = 0; i < peer->ntunnels; i++)
1473 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1475 * Problem: one or more peers have been deleted from the tunnel tree.
1476 * We don't know who they are to try to add them again.
1477 * We need to try to find a new path for each of the disconnected peers.
1478 * Some of them might already have a path to reach them that does not
1479 * involve p1 and p2. Adding all anew might render in a better tree than
1480 * the trivial immediate fix.
1482 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1483 * its children will be reachable trough him.
1485 peer_d = peer_info_get_short(d);
1488 for (p = peer_d->path_head; NULL != p; p = p->next)
1490 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1498 /* No callback, as peer will be already disconnected */
1499 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1503 peer_info_connect (peer_d, peer->tunnels[i]);
1510 * Add the path to the peer and update the path used to reach it in case this
1513 * @param peer_info Destination peer to add the path to.
1514 * @param path New path to add. Last peer must be the peer in arg 1.
1515 * Path will be either used of freed if already known.
1516 * @param trusted Do we trust that this path is real?
1519 path_add_to_peer (struct MeshPeerInfo *peer_info,
1520 struct MeshPeerPath *path,
1523 struct MeshPeerPath *aux;
1527 if ((NULL == peer_info) || (NULL == path))
1530 path_destroy (path);
1533 if (path->length <= 2 && GNUNET_NO == trusted)
1535 /* Only allow CORE to tell us about direct paths */
1536 path_destroy (path);
1539 for (l = 1; l < path->length; l++)
1541 if (path->peers[l] == myid)
1543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1544 "MESH: shortening path by %u\n",
1546 for (l2 = 0; l2 < path->length - l - 1 ; l2++)
1548 path->peers[l2] = path->peers[l + l2];
1552 path->peers = GNUNET_realloc (path->peers,
1553 path->length * sizeof (GNUNET_PEER_Id));
1558 struct GNUNET_PeerIdentity id;
1560 GNUNET_PEER_resolve (peer_info->id, &id);
1561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1562 "MESH: adding path [%u] to peer %s\n",
1567 l = path_get_length (path);
1574 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1576 l2 = path_get_length (aux);
1579 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1580 peer_info->path_tail,
1587 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1594 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1595 peer_info->path_tail,
1602 * Add the path to the origin peer and update the path used to reach it in case
1603 * this is the shortest.
1604 * The path is given in peer_info -> destination, therefore we turn the path
1605 * upside down first.
1607 * @param peer_info Peer to add the path to, being the origin of the path.
1608 * @param path New path to add after being inversed.
1609 * @param trusted Do we trust that this path is real?
1612 path_add_to_origin (struct MeshPeerInfo *peer_info,
1613 struct MeshPeerPath *path,
1617 path_add_to_peer (peer_info, path, trusted);
1622 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1623 * to obtain a local peer -> destination path and interning the peer ids.
1625 * @return Newly allocated and created path
1627 static struct MeshPeerPath *
1628 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1629 unsigned int get_path_length,
1630 const struct GNUNET_PeerIdentity *put_path,
1631 unsigned int put_path_length)
1633 struct MeshPeerPath *p;
1639 GNUNET_PEER_change_rc(myid, 1);
1640 i = get_path_length;
1641 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1642 for (i--; i >= 0; i--)
1644 id = GNUNET_PEER_intern (&get_path[i]);
1645 if (p->length > 0 && id == p->peers[p->length - 1])
1647 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1648 GNUNET_PEER_change_rc(id, -1);
1652 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1653 "MESH: Adding from GET: %s.\n",
1654 GNUNET_i2s(&get_path[i]));
1656 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1657 p->peers[p->length - 1] = id;
1660 i = put_path_length;
1661 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1662 for (i--; i >= 0; i--)
1664 id = GNUNET_PEER_intern (&put_path[i]);
1667 /* PUT path went through us, so discard the path up until now and start
1668 * from here to get a much shorter (and loop-free) path.
1673 if (p->length > 0 && id == p->peers[p->length - 1])
1675 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1676 GNUNET_PEER_change_rc(id, -1);
1680 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1681 "MESH: Adding from PUT: %s.\n",
1682 GNUNET_i2s(&put_path[i]));
1684 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1685 p->peers[p->length - 1] = id;
1689 if (get_path_length > 0)
1690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1691 "MESH: (first of GET: %s)\n",
1692 GNUNET_i2s(&get_path[0]));
1693 if (put_path_length > 0)
1694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1695 "MESH: (first of PUT: %s)\n",
1696 GNUNET_i2s(&put_path[0]));
1697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1698 "MESH: In total: %d hops\n",
1700 for (i = 0; i < p->length; i++)
1702 struct GNUNET_PeerIdentity peer_id;
1704 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1708 GNUNET_i2s(&peer_id));
1716 * Send keepalive packets for a peer
1718 * @param cls Closure (tunnel for which to send the keepalive).
1719 * @param tc Notification context.
1721 * TODO: implement explicit multicast keepalive?
1724 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1728 * Search for a tunnel among the incoming tunnels
1730 * @param tid the local id of the tunnel
1732 * @return tunnel handler, NULL if doesn't exist
1734 static struct MeshTunnel *
1735 tunnel_get_incoming (MESH_TunnelNumber tid)
1737 GNUNET_HashCode hash;
1739 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1740 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1741 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1746 * Search for a tunnel among the tunnels for a client
1748 * @param c the client whose tunnels to search in
1749 * @param tid the local id of the tunnel
1751 * @return tunnel handler, NULL if doesn't exist
1753 static struct MeshTunnel *
1754 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1756 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1758 return tunnel_get_incoming (tid);
1762 GNUNET_HashCode hash;
1764 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1765 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1771 * Search for a tunnel by global ID using PEER_ID
1773 * @param pi owner of the tunnel
1774 * @param tid global tunnel number
1776 * @return tunnel handler, NULL if doesn't exist
1778 static struct MeshTunnel *
1779 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1781 struct MESH_TunnelID id;
1782 GNUNET_HashCode hash;
1787 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1788 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1793 * Search for a tunnel by global ID using full PeerIdentities
1795 * @param oid owner of the tunnel
1796 * @param tid global tunnel number
1798 * @return tunnel handler, NULL if doesn't exist
1800 static struct MeshTunnel *
1801 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1803 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1808 * Callback used to notify a client owner of a tunnel that a peer has
1809 * disconnected, most likely because of a path change.
1811 * @param n Node in the tree representing the disconnected peer
1813 * FIXME: pass tunnel via cls, make param just a peer identity
1816 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1818 struct MeshPeerInfo *peer;
1819 struct MeshPathInfo *path_info;
1821 if (NULL != n->t->client && NULL != nc)
1823 struct GNUNET_MESH_PeerControl msg;
1824 msg.header.size = htons (sizeof (msg));
1825 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1826 msg.tunnel_id = htonl (n->t->local_tid);
1827 GNUNET_PEER_resolve (n->peer, &msg.peer);
1828 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1829 &msg.header, GNUNET_NO);
1831 peer = peer_info_get_short(n->peer);
1832 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1833 path_info->peer = peer;
1834 path_info->t = n->t;
1835 GNUNET_SCHEDULER_add_now(&peer_info_connect_task, path_info);
1840 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1841 * needed rescources.
1842 * If peer already exists, reevaluate shortest path and change if different.
1844 * @param t Tunnel we want to add a new peer to
1845 * @param peer PeerInfo of the peer being added
1849 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1851 struct GNUNET_PeerIdentity id;
1852 struct MeshPeerPath *best_p;
1853 struct MeshPeerPath *p;
1854 unsigned int best_cost;
1857 GNUNET_PEER_resolve(peer->id, &id);
1859 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1862 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1863 GNUNET_assert (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put(
1867 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1870 if (NULL != (p = peer->path_head))
1873 best_cost = path_get_cost(t->tree, p);
1876 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1883 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1884 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1885 t->path_refresh_task =
1886 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1890 /* Start a DHT get if necessary */
1891 peer_info_connect(peer, t);
1896 * Add a path to a tunnel which we don't own, just to remember the next hop.
1897 * If destination node was already in the tunnel, the first hop information
1898 * will be replaced with the new path.
1900 * @param t Tunnel we want to add a new peer to
1901 * @param p Path to add
1902 * @param own_pos Position of local node in path.
1906 tunnel_add_path (struct MeshTunnel *t,
1907 struct MeshPeerPath *p,
1908 unsigned int own_pos)
1910 struct GNUNET_PeerIdentity id;
1912 GNUNET_assert (0 != own_pos);
1913 tree_add_path(t->tree, p, NULL);
1914 if (NULL == t->tree->me)
1915 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1916 if (own_pos < p->length - 1)
1918 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1919 tree_update_first_hops(t->tree, t->tree->me, &id);
1925 * Notifies a tunnel that a connection has broken that affects at least
1926 * some of its peers. Sends a notification towards the root of the tree.
1927 * In case the peer is the owner of the tree, notifies the client that owns
1928 * the tunnel and tries to reconnect.
1930 * @param t Tunnel affected.
1931 * @param p1 Peer that got disconnected from p2.
1932 * @param p2 Peer that got disconnected from p1.
1934 * @return Short ID of the peer disconnected (either p1 or p2).
1935 * 0 if the tunnel remained unaffected.
1937 static GNUNET_PEER_Id
1938 tunnel_notify_connection_broken (struct MeshTunnel *t,
1944 pid = tree_notify_connection_broken (t->tree,
1947 ¬ify_peer_disconnected);
1948 if (myid != p1 && myid != p2)
1954 if (NULL != t->tree->me->parent)
1956 /* We are the peer still connected, notify owner of the disconnection. */
1957 struct GNUNET_MESH_PathBroken msg;
1958 struct GNUNET_PeerIdentity neighbor;
1960 msg.header.size = htons (sizeof (msg));
1961 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1962 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1963 msg.tid = htonl (t->id.tid);
1964 msg.peer1 = my_full_id;
1965 GNUNET_PEER_resolve (pid, &msg.peer2);
1966 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1967 send_message (&msg.header, &neighbor);
1975 * Send a message in a tunnel in multicast, sending a copy to each child node
1976 * down the local one in the tunnel tree.
1978 * @param t Tunnel in which to send the data.
1979 * @param msg Message to be sent
1981 * @return Number of copies sent.
1983 * TODO: unifiy shared resources and reference counter management
1986 tunnel_send_multicast (struct MeshTunnel *t,
1987 const struct GNUNET_MessageHeader *msg)
1989 struct GNUNET_PeerIdentity neighbor;
1990 struct MeshDataDescriptor *info;
1991 struct MeshTunnelTreeNode *n;
1992 struct MeshTunnelTreeNode *counter;
1993 GNUNET_SCHEDULER_TaskIdentifier *task;
1994 unsigned int *copies;
1999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2000 "MESH: sending a multicast packet...\n");
2001 size = ntohs (msg->size);
2002 GNUNET_assert (NULL != t->tree->me);
2003 n = t->tree->me->children_head;
2006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2007 "MESH: no children in the tree, no one to send.\n");
2010 copies = GNUNET_malloc (sizeof (unsigned int));
2011 for (counter = n; NULL != counter; counter = counter->next)
2013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
2014 data = GNUNET_malloc (size);
2015 memcpy (data, msg, size);
2016 if (NULL != t->client)
2018 task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
2019 *task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
2024 task = NULL; // So GCC shuts up about task being potentially uninitialized
2027 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2030 info->copies = copies;
2031 if (NULL != t->client)
2033 info->client = t->client->handle;
2034 info->timeout_task = task;
2036 info->destination = n->peer;
2037 GNUNET_PEER_resolve (n->peer, &neighbor);
2038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2039 "MESH: sending to %s...\n",
2040 GNUNET_i2s (&neighbor));
2041 info->peer = peer_info_get(&neighbor);
2042 GNUNET_assert (NULL != info->peer);
2043 i = peer_info_transmit_slot(info->peer);
2044 info->handler_n = i;
2045 info->peer->infos[i] = info;
2046 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2047 info->peer->core_transmit[i] =
2048 GNUNET_CORE_notify_transmit_ready (core_handle,
2051 GNUNET_TIME_UNIT_FOREVER_REL,
2054 &send_core_data_multicast, info);
2062 * Send a message to all peers in this tunnel that the tunnel is no longer
2065 * @param t The tunnel whose peers to notify.
2068 tunnel_send_destroy (struct MeshTunnel *t)
2070 struct GNUNET_MESH_TunnelDestroy msg;
2072 msg.header.size = htons (sizeof (msg));
2073 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2074 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2075 msg.tid = htonl (t->id.tid);
2076 tunnel_send_multicast (t, &msg.header);
2082 * Destroy the tunnel and free any allocated resources linked to it
2084 * @param t the tunnel to destroy
2086 * @return GNUNET_OK on success
2089 tunnel_destroy (struct MeshTunnel *t)
2091 struct MeshClient *c;
2092 struct MeshQueue *q;
2093 struct MeshQueue *qn;
2094 GNUNET_HashCode hash;
2103 struct GNUNET_PeerIdentity id;
2105 GNUNET_PEER_resolve(t->id.oid, &id);
2106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2107 "MESH: destroying tunnel %s [%x]\n",
2111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2115 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2116 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2121 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2123 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2127 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2129 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2130 GNUNET_break (GNUNET_YES ==
2131 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2134 if (NULL != t->peers)
2136 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2137 &peer_info_delete_tunnel, t);
2138 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2143 if (NULL != q->data)
2144 GNUNET_free (q->data);
2148 /* TODO cancel core transmit ready in case it was active */
2150 tree_destroy(t->tree);
2151 if (NULL != t->dht_get_type)
2152 GNUNET_DHT_get_stop(t->dht_get_type);
2153 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2154 GNUNET_SCHEDULER_cancel(t->timeout_task);
2155 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2156 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2163 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2164 * that are no longer needed, as well as nodes of no longer reachable peers.
2165 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2167 * @param t Tunnel from which to remove the path.
2168 * @param p Peer which should be removed.
2171 tunnel_delete_peer (struct MeshTunnel *t,
2172 GNUNET_PEER_Id peer)
2174 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2175 if (NULL == t->tree->root)
2181 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2182 * client when the client disconnects.
2184 * @param cls closure (client that is disconnecting)
2185 * @param key the hash of the local tunnel id (used to access the hashmap)
2186 * @param value the value stored at the key (tunnel to destroy)
2188 * @return GNUNET_OK on success
2191 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2193 struct MeshTunnel *t = value;
2196 r = tunnel_destroy (t);
2202 * Timeout function, destroys tunnel if called
2204 * @param cls Closure (tunnel to destroy).
2205 * @param tc TaskContext
2208 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2210 struct MeshTunnel *t = cls;
2212 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2214 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2219 * Resets the tunnel timeout. Starts it if no timeout was running.
2221 * @param t Tunnel whose timeout to reset.
2224 tunnel_reset_timeout (struct MeshTunnel *t)
2226 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2227 GNUNET_SCHEDULER_cancel (t->timeout_task);
2228 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2229 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2235 /******************************************************************************/
2236 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2237 /******************************************************************************/
2240 * Function called to notify a client about the socket
2241 * being ready to queue more data. "buf" will be
2242 * NULL and "size" zero if the socket was closed for
2243 * writing in the meantime.
2245 * @param cls closure
2246 * @param size number of bytes available in buf
2247 * @param buf where the callee should write the message
2248 * @return number of bytes written to buf
2251 send_core_create_path (void *cls, size_t size, void *buf)
2253 struct MeshPathInfo *info = cls;
2254 struct GNUNET_MESH_ManipulatePath *msg;
2255 struct GNUNET_PeerIdentity *peer_ptr;
2256 struct MeshPeerInfo *peer = info->peer;
2257 struct MeshTunnel *t = info->t;
2258 struct MeshPeerPath *p = info->path;
2262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2263 "MESH: CREATE PATH sending...\n");
2265 sizeof (struct GNUNET_MESH_ManipulatePath) +
2266 p->length * sizeof (struct GNUNET_PeerIdentity);
2268 if (size < size_needed || NULL == buf)
2270 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2274 info->peer->core_transmit[info->pos] =
2275 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2276 GNUNET_TIME_UNIT_FOREVER_REL,
2277 path_get_first_hop (t->tree, peer->id),
2279 &send_core_create_path,
2283 info->peer->core_transmit[info->pos] = NULL;
2286 struct GNUNET_PeerIdentity id;
2288 GNUNET_PEER_resolve (peer->id, &id);
2289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2290 "MESH: setting core_transmit %s [%u] to NULL\n",
2295 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2296 msg->header.size = htons (size_needed);
2297 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2298 msg->tid = ntohl (t->id.tid);
2300 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2301 for (i = 0; i < p->length; i++)
2303 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2310 "MESH: CREATE PATH (%u bytes long) sent!\n",
2317 * Function called to notify a client about the socket
2318 * being ready to queue more data. "buf" will be
2319 * NULL and "size" zero if the socket was closed for
2320 * writing in the meantime.
2322 * @param cls closure (data itself)
2323 * @param size number of bytes available in buf
2324 * @param buf where the callee should write the message
2326 * @return number of bytes written to buf
2329 send_core_data_multicast (void *cls, size_t size, void *buf)
2331 struct MeshDataDescriptor *info = cls;
2334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2335 GNUNET_assert (NULL != info);
2336 GNUNET_assert (NULL != info->peer);
2337 total_size = info->size;
2338 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2340 if (total_size > size)
2343 struct GNUNET_PeerIdentity id;
2345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2346 "MESH: Multicast: retransmitting... (%u/%u)\n",
2348 GNUNET_PEER_resolve(info->peer->id, &id);
2349 info->peer->core_transmit[info->handler_n] =
2350 GNUNET_CORE_notify_transmit_ready (core_handle,
2353 GNUNET_TIME_UNIT_FOREVER_REL,
2356 &send_core_data_multicast,
2360 info->peer->core_transmit[info->handler_n] = NULL;
2361 info->peer->infos[info->handler_n] = NULL;
2362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2363 memcpy (buf, info->data, total_size);
2366 struct GNUNET_MESH_Multicast *mc;
2367 struct GNUNET_MessageHeader *mh;
2370 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2372 mc = (struct GNUNET_MESH_Multicast *) mh;
2373 mh = (struct GNUNET_MessageHeader *) &mc[1];
2374 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2375 "MESH: multicast, payload type %u\n",
2377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2378 "MESH: multicast, payload size %u\n",
2383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2389 data_descriptor_decrement_multicast (info);
2390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2398 * Function called to notify a client about the socket
2399 * being ready to queue more data. "buf" will be
2400 * NULL and "size" zero if the socket was closed for
2401 * writing in the meantime.
2403 * @param cls closure (MeshDataDescriptor)
2404 * @param size number of bytes available in buf
2405 * @param buf where the callee should write the message
2406 * @return number of bytes written to buf
2409 send_core_path_ack (void *cls, size_t size, void *buf)
2411 struct MeshDataDescriptor *info = cls;
2412 struct GNUNET_MESH_PathACK *msg = buf;
2414 GNUNET_assert (NULL != info);
2417 info->peer->core_transmit[info->handler_n] = NULL;
2419 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2424 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2425 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2426 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2427 msg->tid = htonl (info->origin->tid);
2428 msg->peer_id = my_full_id;
2430 /* TODO add signature */
2432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2433 return sizeof (struct GNUNET_MESH_PathACK);
2437 /******************************************************************************/
2438 /******************** MESH NETWORK HANDLERS **************************/
2439 /******************************************************************************/
2443 * Core handler for path creation
2445 * @param cls closure
2446 * @param message message
2447 * @param peer peer identity this notification is about
2448 * @param atsi performance data
2449 * @param atsi_count number of records in 'atsi'
2451 * @return GNUNET_OK to keep the connection open,
2452 * GNUNET_SYSERR to close it (signal serious error)
2455 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2456 const struct GNUNET_MessageHeader *message,
2457 const struct GNUNET_ATS_Information *atsi,
2458 unsigned int atsi_count)
2460 unsigned int own_pos;
2463 MESH_TunnelNumber tid;
2464 struct GNUNET_MESH_ManipulatePath *msg;
2465 struct GNUNET_PeerIdentity *pi;
2466 GNUNET_HashCode hash;
2467 struct MeshPeerPath *path;
2468 struct MeshPeerInfo *dest_peer_info;
2469 struct MeshPeerInfo *orig_peer_info;
2470 struct MeshTunnel *t;
2472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2473 "MESH: Received a path create msg [%s]\n",
2474 GNUNET_i2s(&my_full_id));
2475 size = ntohs (message->size);
2476 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2478 GNUNET_break_op (0);
2482 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2483 if (size % sizeof (struct GNUNET_PeerIdentity))
2485 GNUNET_break_op (0);
2488 size /= sizeof (struct GNUNET_PeerIdentity);
2491 GNUNET_break_op (0);
2494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2495 "MESH: path has %u hops.\n",
2497 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2499 tid = ntohl (msg->tid);
2500 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2501 t = tunnel_get (pi, tid);
2502 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2503 "MESH: path is for tunnel %s [%X].\n",
2508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2509 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2510 t->id.oid = GNUNET_PEER_intern (pi);
2512 while (NULL != tunnel_get_incoming (next_local_tid))
2513 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2514 t->local_tid = next_local_tid++;
2515 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2516 t->tree = tree_new(t, t->id.oid);
2518 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2520 GNUNET_CONTAINER_multihashmap_put (
2524 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2530 tunnel_reset_timeout (t);
2531 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2533 GNUNET_CONTAINER_multihashmap_put (
2537 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2545 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2546 if (NULL == dest_peer_info)
2548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2549 "MESH: Creating PeerInfo for destination.\n");
2550 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2551 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2552 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2554 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2556 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2557 if (NULL == orig_peer_info)
2559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2560 "MESH: Creating PeerInfo for origin.\n");
2561 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2562 orig_peer_info->id = GNUNET_PEER_intern (pi);
2563 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2564 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2567 path = path_new (size);
2569 for (i = 0; i < size; i++)
2571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2572 "MESH: ... adding %s\n",
2573 GNUNET_i2s(&pi[i]));
2574 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2575 if (path->peers[i] == myid)
2578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2579 "MESH: Own position: %u\n", own_pos);
2582 /* cannot be self, must be 'not found' */
2583 /* create path: self not found in path through self */
2584 GNUNET_break_op (0);
2585 path_destroy (path);
2586 /* FIXME error. destroy tunnel? leave for timeout? */
2589 tunnel_add_path (t, path, own_pos);
2590 if (own_pos == size - 1)
2592 /* It is for us! Send ack. */
2593 struct GNUNET_MESH_TunnelNotification cmsg;
2594 struct MeshDataDescriptor *info;
2597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2598 "MESH: It's for us!\n");
2599 path_add_to_origin (orig_peer_info, path, GNUNET_NO);
2600 if (NULL == t->peers)
2601 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2602 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2604 &my_full_id.hashPubKey,
2605 peer_info_get(&my_full_id),
2606 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2607 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2608 info->origin = &t->id;
2609 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2610 GNUNET_assert (NULL != info->peer);
2611 j = peer_info_transmit_slot(info->peer);
2612 info->handler_n = j;
2613 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2614 info->peer->infos[j] = info;
2615 info->peer->core_transmit[j] =
2616 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2617 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2618 sizeof (struct GNUNET_MESH_PathACK),
2619 &send_core_path_ack, info);
2620 cmsg.header.size = htons(sizeof(cmsg));
2621 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2622 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2623 cmsg.tunnel_id = htonl(t->local_tid);
2624 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2628 struct MeshPeerPath *path2;
2630 /* It's for somebody else! Retransmit. */
2631 path2 = path_duplicate(path);
2632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2633 "MESH: Retransmitting.\n");
2634 path_add_to_peer(dest_peer_info, path, GNUNET_NO);
2635 path = path_duplicate(path2);
2636 path_add_to_origin(orig_peer_info, path2, GNUNET_NO);
2637 send_create_path(dest_peer_info, path, t);
2644 * Core handler for path destruction
2646 * @param cls closure
2647 * @param message message
2648 * @param peer peer identity this notification is about
2649 * @param atsi performance data
2650 * @param atsi_count number of records in 'atsi'
2652 * @return GNUNET_OK to keep the connection open,
2653 * GNUNET_SYSERR to close it (signal serious error)
2656 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2657 const struct GNUNET_MessageHeader *message,
2658 const struct GNUNET_ATS_Information *atsi,
2659 unsigned int atsi_count)
2661 struct GNUNET_MESH_ManipulatePath *msg;
2662 struct GNUNET_PeerIdentity *pi;
2663 struct MeshPeerPath *path;
2664 struct MeshTunnel *t;
2665 unsigned int own_pos;
2669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2670 "MESH: Received a PATH DESTROY msg from %s\n",
2672 size = ntohs (message->size);
2673 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2675 GNUNET_break_op (0);
2679 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2680 if (size % sizeof (struct GNUNET_PeerIdentity))
2682 GNUNET_break_op (0);
2685 size /= sizeof (struct GNUNET_PeerIdentity);
2688 GNUNET_break_op (0);
2691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2692 "MESH: path has %u hops.\n",
2695 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2696 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2698 "MESH: path is for tunnel %s [%X].\n",
2701 t = tunnel_get (pi, ntohl (msg->tid));
2704 /* TODO notify back: we don't know this tunnel */
2705 GNUNET_break_op (0);
2708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2709 path = path_new (size);
2711 for (i = 0; i < size; i++)
2713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2714 "MESH: ... adding %s\n",
2715 GNUNET_i2s(&pi[i]));
2716 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2717 if (path->peers[i] == myid)
2720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2721 "MESH: Own position: %u\n", own_pos);
2722 if (own_pos < path->length - 1)
2723 send_message (message, &pi[own_pos + 1]);
2724 tunnel_delete_peer (t, path->peers[path->length - 1]);
2725 path_destroy (path);
2731 * Core handler for notifications of broken paths
2733 * @param cls closure
2734 * @param message message
2735 * @param peer peer identity this notification is about
2736 * @param atsi performance data
2737 * @param atsi_count number of records in 'atsi'
2739 * @return GNUNET_OK to keep the connection open,
2740 * GNUNET_SYSERR to close it (signal serious error)
2743 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2744 const struct GNUNET_MessageHeader *message,
2745 const struct GNUNET_ATS_Information *atsi,
2746 unsigned int atsi_count)
2748 struct GNUNET_MESH_PathBroken *msg;
2749 struct MeshTunnel *t;
2751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2752 "MESH: Received a PATH BROKEN msg from %s\n",
2754 msg = (struct GNUNET_MESH_PathBroken *) message;
2755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2756 "MESH: regarding %s\n",
2757 GNUNET_i2s(&msg->peer1));
2758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2759 "MESH: regarding %s\n",
2760 GNUNET_i2s(&msg->peer2));
2761 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2764 GNUNET_break_op (0);
2767 tunnel_notify_connection_broken(t,
2768 GNUNET_PEER_search(&msg->peer1),
2769 GNUNET_PEER_search(&msg->peer2));
2776 * Core handler for tunnel destruction
2778 * @param cls closure
2779 * @param message message
2780 * @param peer peer identity this notification is about
2781 * @param atsi performance data
2782 * @param atsi_count number of records in 'atsi'
2784 * @return GNUNET_OK to keep the connection open,
2785 * GNUNET_SYSERR to close it (signal serious error)
2788 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2789 const struct GNUNET_MessageHeader *message,
2790 const struct GNUNET_ATS_Information *atsi,
2791 unsigned int atsi_count)
2793 struct GNUNET_MESH_TunnelDestroy *msg;
2794 struct MeshTunnel *t;
2796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2797 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2799 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2801 "MESH: for tunnel %s [%u]\n",
2802 GNUNET_i2s (&msg->oid),
2804 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2807 /* Probably already got the message from another path,
2808 * destroyed the tunnel and retransmitted to children.
2813 if (t->id.oid == myid)
2815 GNUNET_break_op (0);
2818 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2820 /* Tunnel was incoming, notify clients */
2821 send_clients_tunnel_destroy (t);
2823 tunnel_send_destroy (t);
2830 * Core handler for mesh network traffic going from the origin to a peer
2832 * @param cls closure
2833 * @param peer peer identity this notification is about
2834 * @param message message
2835 * @param atsi performance data
2836 * @param atsi_count number of records in 'atsi'
2837 * @return GNUNET_OK to keep the connection open,
2838 * GNUNET_SYSERR to close it (signal serious error)
2841 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2842 const struct GNUNET_MessageHeader *message,
2843 const struct GNUNET_ATS_Information *atsi,
2844 unsigned int atsi_count)
2846 struct GNUNET_MESH_Unicast *msg;
2847 struct MeshTunnel *t;
2851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2852 "MESH: got a unicast packet from %s\n",
2854 size = ntohs (message->size);
2856 sizeof (struct GNUNET_MESH_Unicast) +
2857 sizeof (struct GNUNET_MessageHeader))
2862 msg = (struct GNUNET_MESH_Unicast *) message;
2863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2864 "MESH: of type %u\n",
2865 ntohs (msg[1].header.type));
2866 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2869 /* TODO notify back: we don't know this tunnel */
2870 GNUNET_break_op (0);
2873 tunnel_reset_timeout (t);
2874 pid = GNUNET_PEER_search(&msg->destination);
2877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2878 "MESH: it's for us! sending to clients...\n");
2879 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2883 "MESH: not for us, retransmitting...\n");
2884 send_message (message, path_get_first_hop(t->tree, pid));
2890 * Core handler for mesh network traffic going from the origin to all peers
2892 * @param cls closure
2893 * @param message message
2894 * @param peer peer identity this notification is about
2895 * @param atsi performance data
2896 * @param atsi_count number of records in 'atsi'
2897 * @return GNUNET_OK to keep the connection open,
2898 * GNUNET_SYSERR to close it (signal serious error)
2900 * TODO: Check who we got this from, to validate route.
2903 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2904 const struct GNUNET_MessageHeader *message,
2905 const struct GNUNET_ATS_Information *atsi,
2906 unsigned int atsi_count)
2908 struct GNUNET_MESH_Multicast *msg;
2909 struct MeshTunnel *t;
2912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2913 "MESH: got a multicast packet from %s\n",
2915 size = ntohs (message->size);
2916 if (sizeof (struct GNUNET_MESH_Multicast) +
2917 sizeof (struct GNUNET_MessageHeader) > size)
2919 GNUNET_break_op (0);
2922 msg = (struct GNUNET_MESH_Multicast *) message;
2923 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2927 /* TODO notify that we dont know that tunnel */
2928 GNUNET_break_op (0);
2931 tunnel_reset_timeout (t);
2933 /* Transmit to locally interested clients */
2934 if (NULL != t->peers &&
2935 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2937 send_subscribed_clients (message, &msg[1].header);
2939 tunnel_send_multicast(t, message);
2945 * Core handler for mesh network traffic toward the owner of a tunnel
2947 * @param cls closure
2948 * @param message message
2949 * @param peer peer identity this notification is about
2950 * @param atsi performance data
2951 * @param atsi_count number of records in 'atsi'
2953 * @return GNUNET_OK to keep the connection open,
2954 * GNUNET_SYSERR to close it (signal serious error)
2957 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2958 const struct GNUNET_MessageHeader *message,
2959 const struct GNUNET_ATS_Information *atsi,
2960 unsigned int atsi_count)
2962 struct GNUNET_MESH_ToOrigin *msg;
2963 struct GNUNET_PeerIdentity id;
2964 struct MeshPeerInfo *peer_info;
2965 struct MeshTunnel *t;
2968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2969 "MESH: got a ToOrigin packet from %s\n",
2971 size = ntohs (message->size);
2972 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2973 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2975 GNUNET_break_op (0);
2978 msg = (struct GNUNET_MESH_ToOrigin *) message;
2979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2980 "MESH: of type %u\n",
2981 ntohs (msg[1].header.type));
2982 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2986 /* TODO notify that we dont know this tunnel (whom)? */
2987 GNUNET_break_op (0);
2991 if (t->id.oid == myid)
2994 struct GNUNET_MESH_ToOrigin *copy;
2996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2997 "MESH: it's for us! sending to clients...\n");
2998 if (NULL == t->client)
3000 /* got data packet for ownerless tunnel */
3001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3002 "MESH: no clients!\n");
3003 GNUNET_break_op (0);
3006 /* TODO signature verification */
3007 memcpy (cbuf, message, size);
3008 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3009 copy->tid = htonl (t->local_tid);
3010 GNUNET_SERVER_notification_context_unicast (nc,
3016 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3017 "MESH: not for us, retransmitting...\n");
3019 peer_info = peer_info_get (&msg->oid);
3020 if (NULL == peer_info)
3022 /* unknown origin of tunnel */
3026 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
3027 send_message (message, &id);
3034 * Core handler for path ACKs
3036 * @param cls closure
3037 * @param message message
3038 * @param peer peer identity this notification is about
3039 * @param atsi performance data
3040 * @param atsi_count number of records in 'atsi'
3042 * @return GNUNET_OK to keep the connection open,
3043 * GNUNET_SYSERR to close it (signal serious error)
3046 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3047 const struct GNUNET_MessageHeader *message,
3048 const struct GNUNET_ATS_Information *atsi,
3049 unsigned int atsi_count)
3051 struct GNUNET_MESH_PathACK *msg;
3052 struct GNUNET_PeerIdentity id;
3053 struct MeshTunnelTreeNode *n;
3054 struct MeshPeerInfo *peer_info;
3055 struct MeshTunnel *t;
3057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3058 "MESH: Received a path ACK msg [%s]\n",
3059 GNUNET_i2s(&my_full_id));
3060 msg = (struct GNUNET_MESH_PathACK *) message;
3061 t = tunnel_get (&msg->oid, msg->tid);
3064 /* TODO notify that we don't know the tunnel */
3068 /* Message for us? */
3069 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
3072 if (NULL == t->client)
3074 GNUNET_break_op (0);
3077 if (NULL != t->dht_get_type)
3079 GNUNET_DHT_get_stop (t->dht_get_type);
3080 t->dht_get_type = NULL;
3082 peer_info = peer_info_get (&msg->peer_id);
3083 n = tree_find_peer(t->tree->root, peer_info->id);
3086 GNUNET_break_op (0);
3089 n->status = MESH_PEER_READY;
3090 send_client_peer_connected(t, peer_info->id);
3094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3095 "MESH: not for us, retransmitting...\n");
3096 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
3097 peer_info = peer_info_get (&msg->oid);
3098 if (NULL == peer_info)
3100 /* If we know the tunnel, we should DEFINITELY know the peer */
3104 send_message (message, &id);
3110 * Functions to handle messages from core
3112 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3113 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3114 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3115 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3116 sizeof (struct GNUNET_MESH_PathBroken)},
3117 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3118 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3119 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3120 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3121 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3122 sizeof (struct GNUNET_MESH_PathACK)},
3128 /******************************************************************************/
3129 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3130 /******************************************************************************/
3133 * deregister_app: iterator for removing each application registered by a client
3135 * @param cls closure
3136 * @param key the hash of the application id (used to access the hashmap)
3137 * @param value the value stored at the key (client)
3139 * @return GNUNET_OK on success
3142 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3144 GNUNET_break (GNUNET_YES ==
3145 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3151 * notify_client_connection_failure: notify a client that the connection to the
3152 * requested remote peer is not possible (for instance, no route found)
3153 * Function called when the socket is ready to queue more data. "buf" will be
3154 * NULL and "size" zero if the socket was closed for writing in the meantime.
3156 * @param cls closure
3157 * @param size number of bytes available in buf
3158 * @param buf where the callee should write the message
3159 * @return number of bytes written to buf
3162 notify_client_connection_failure (void *cls, size_t size, void *buf)
3165 struct MeshPeerInfo *peer_info;
3166 struct GNUNET_MESH_PeerControl *msg;
3167 struct GNUNET_PeerIdentity id;
3169 if (0 == size && NULL == buf)
3171 // TODO retry? cancel?
3175 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3176 peer_info = (struct MeshPeerInfo *) cls;
3177 msg = (struct GNUNET_MESH_PeerControl *) buf;
3178 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3179 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3180 // msg->tunnel_id = htonl(peer_info->t->tid);
3181 GNUNET_PEER_resolve (peer_info->id, &id);
3182 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3190 * Send keepalive packets for a peer
3192 * @param cls Closure (tunnel for which to send the keepalive).
3193 * @param tc Notification context.
3195 * TODO: implement explicit multicast keepalive?
3198 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3200 struct MeshTunnel *t = cls;
3201 struct GNUNET_MessageHeader *payload;
3202 struct GNUNET_MESH_Multicast *msg;
3203 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3204 sizeof(struct GNUNET_MessageHeader);
3207 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3211 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3214 "MESH: sending keepalive for tunnel %d\n",
3217 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3218 msg->header.size = htons (size);
3219 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3220 msg->oid = my_full_id;
3221 msg->tid = htonl(t->id.tid);
3222 payload = (struct GNUNET_MessageHeader *) &msg[1];
3223 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3224 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3225 tunnel_send_multicast (t, &msg->header);
3227 t->path_refresh_task =
3228 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3234 * Function to process paths received for a new peer addition. The recorded
3235 * paths form the initial tunnel, which can be optimized later.
3236 * Called on each result obtained for the DHT search.
3238 * @param cls closure
3239 * @param exp when will this value expire
3240 * @param key key of the result
3241 * @param type type of the result
3242 * @param size number of bytes in data
3243 * @param data pointer to the result data
3245 * TODO: re-issue the request after certain time? cancel after X results?
3248 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3249 const GNUNET_HashCode * key,
3250 const struct GNUNET_PeerIdentity *get_path,
3251 unsigned int get_path_length,
3252 const struct GNUNET_PeerIdentity *put_path,
3253 unsigned int put_path_length,
3254 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3256 struct MeshPathInfo *path_info = cls;
3257 struct MeshPeerPath *p;
3258 struct GNUNET_PeerIdentity pi;
3261 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3262 "MESH: Got results from DHT!\n");
3263 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3264 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3267 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3268 // path_info->peer->dhtget = NULL;
3270 p = path_build_from_dht (get_path, get_path_length,
3271 put_path, put_path_length);
3272 path_add_to_peer (path_info->peer, p, GNUNET_NO);
3273 for (i = 0; i < path_info->peer->ntunnels; i++)
3275 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3276 peer_info_connect(path_info->peer, path_info->t);
3278 // GNUNET_free (path_info);
3285 * Function to process paths received for a new peer addition. The recorded
3286 * paths form the initial tunnel, which can be optimized later.
3287 * Called on each result obtained for the DHT search.
3289 * @param cls closure
3290 * @param exp when will this value expire
3291 * @param key key of the result
3292 * @param type type of the result
3293 * @param size number of bytes in data
3294 * @param data pointer to the result data
3297 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3298 const GNUNET_HashCode * key,
3299 const struct GNUNET_PeerIdentity *get_path,
3300 unsigned int get_path_length,
3301 const struct GNUNET_PeerIdentity *put_path,
3302 unsigned int put_path_length,
3303 enum GNUNET_BLOCK_Type type, size_t size,
3306 const struct GNUNET_PeerIdentity *pi = data;
3307 struct MeshTunnel *t = cls;
3308 struct MeshPeerInfo *peer_info;
3309 struct MeshPeerPath *p;
3311 if (size != sizeof (struct GNUNET_PeerIdentity))
3313 GNUNET_break_op (0);
3316 GNUNET_assert (NULL != t->client);
3317 peer_info = peer_info_get (pi);
3318 (void) GNUNET_CONTAINER_multihashmap_put (
3322 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3324 p = path_build_from_dht (get_path, get_path_length,
3325 put_path, put_path_length);
3326 path_add_to_peer (peer_info, p, GNUNET_NO);
3327 tunnel_add_peer(t, peer_info);
3328 peer_info_connect (peer_info, t);
3332 /******************************************************************************/
3333 /********************* MESH LOCAL HANDLES **************************/
3334 /******************************************************************************/
3338 * Handler for client disconnection
3340 * @param cls closure
3341 * @param client identification of the client; NULL
3342 * for the last call when the server is destroyed
3345 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3347 struct MeshClient *c;
3348 struct MeshClient *next;
3350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3359 if (c->handle != client && NULL != client)
3361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3366 GNUNET_SERVER_client_drop (c->handle);
3367 if (NULL != c->tunnels)
3369 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3370 &tunnel_destroy_iterator,
3372 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3375 /* deregister clients applications */
3376 if (NULL != c->apps)
3378 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3379 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3381 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3382 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3384 GNUNET_SCHEDULER_cancel (announce_applications_task);
3385 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3387 if (NULL != c->types)
3388 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3390 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3402 * Handler for new clients
3404 * @param cls closure
3405 * @param client identification of the client
3406 * @param message the actual message, which includes messages the client wants
3409 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3410 const struct GNUNET_MessageHeader *message)
3412 struct GNUNET_MESH_ClientConnect *cc_msg;
3413 struct MeshClient *c;
3414 GNUNET_MESH_ApplicationType *a;
3421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3422 /* Check data sanity */
3423 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3424 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3425 ntypes = ntohs (cc_msg->types);
3426 napps = ntohs (cc_msg->applications);
3428 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3431 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3435 /* Create new client structure */
3436 c = GNUNET_malloc (sizeof (struct MeshClient));
3438 c->id = next_client_id++;
3440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3442 GNUNET_SERVER_client_keep (client);
3443 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3446 GNUNET_MESH_ApplicationType at;
3449 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3450 for (i = 0; i < napps; i++)
3453 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3454 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3455 /* store in clients hashmap */
3456 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3457 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3458 /* store in global hashmap, for announcements */
3459 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3460 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3462 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3463 announce_applications_task =
3464 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3472 t = (uint16_t *) & a[napps];
3473 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3474 for (i = 0; i < ntypes; i++)
3477 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3479 /* store in clients hashmap */
3480 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3481 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3482 /* store in global hashmap */
3483 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3484 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3488 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3490 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3491 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3492 GNUNET_SERVER_notification_context_add (nc, client);
3494 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3502 * Handler for requests of new tunnels
3504 * @param cls closure
3505 * @param client identification of the client
3506 * @param message the actual message
3509 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3510 const struct GNUNET_MessageHeader *message)
3512 struct GNUNET_MESH_TunnelMessage *t_msg;
3513 struct MeshTunnel *t;
3514 struct MeshClient *c;
3515 GNUNET_HashCode hash;
3517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3519 /* Sanity check for client registration */
3520 if (NULL == (c = client_get (client)))
3523 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3530 /* Message sanity check */
3531 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3534 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3538 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3539 /* Sanity check for tunnel numbering */
3540 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3543 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3546 /* Sanity check for duplicate tunnel IDs */
3547 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3550 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3554 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3555 while (NULL != tunnel_get_by_pi (myid, next_tid))
3556 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3557 t->id.tid = next_tid++;
3558 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3560 t->local_tid = ntohl (t_msg->tunnel_id);
3562 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3563 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3564 GNUNET_i2s (&my_full_id),
3569 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3571 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3573 GNUNET_CONTAINER_multihashmap_put (
3574 c->tunnels, &hash, t,
3575 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3578 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3582 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3584 GNUNET_CONTAINER_multihashmap_put (
3586 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3589 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3592 t->tree = tree_new (t, myid);
3593 t->tree->refresh = REFRESH_PATH_TIME;
3594 t->tree->root->status = MESH_PEER_READY;
3595 t->tree->me = t->tree->root;
3597 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3603 * Handler for requests of deleting tunnels
3605 * @param cls closure
3606 * @param client identification of the client
3607 * @param message the actual message
3610 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3611 const struct GNUNET_MessageHeader *message)
3613 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3614 struct MeshClient *c;
3615 struct MeshTunnel *t;
3616 MESH_TunnelNumber tid;
3617 GNUNET_HashCode hash;
3619 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3620 "MESH: Got a DESTROY TUNNEL from client!\n");
3622 /* Sanity check for client registration */
3623 if (NULL == (c = client_get (client)))
3626 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3629 /* Message sanity check */
3630 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3633 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3639 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3641 /* Retrieve tunnel */
3642 tid = ntohl (tunnel_msg->tunnel_id);
3644 /* Remove from local id hashmap */
3645 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3646 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3647 GNUNET_assert (GNUNET_YES ==
3648 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t));
3651 tunnel_send_destroy (t);
3653 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3659 * Handler for connection requests to new peers
3661 * @param cls closure
3662 * @param client identification of the client
3663 * @param message the actual message (PeerControl)
3666 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3667 const struct GNUNET_MessageHeader *message)
3669 struct GNUNET_MESH_PeerControl *peer_msg;
3670 struct MeshPeerInfo *peer_info;
3671 struct MeshClient *c;
3672 struct MeshTunnel *t;
3673 MESH_TunnelNumber tid;
3675 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3676 /* Sanity check for client registration */
3677 if (NULL == (c = client_get (client)))
3680 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3684 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3685 /* Sanity check for message size */
3686 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3689 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3693 /* Tunnel exists? */
3694 tid = ntohl (peer_msg->tunnel_id);
3695 t = tunnel_get_by_local_id (c, tid);
3699 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3703 /* Does client own tunnel? */
3704 if (t->client->handle != client)
3707 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3710 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3711 GNUNET_i2s(&peer_msg->peer));
3712 peer_info = peer_info_get (&peer_msg->peer);
3714 tunnel_add_peer(t, peer_info);
3715 peer_info_connect(peer_info, t);
3717 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3723 * Handler for disconnection requests of peers in a tunnel
3725 * @param cls closure
3726 * @param client identification of the client
3727 * @param message the actual message (PeerControl)
3730 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3731 const struct GNUNET_MessageHeader *message)
3733 struct GNUNET_MESH_PeerControl *peer_msg;
3734 struct MeshPeerInfo *peer_info;
3735 struct MeshClient *c;
3736 struct MeshTunnel *t;
3737 MESH_TunnelNumber tid;
3739 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3740 /* Sanity check for client registration */
3741 if (NULL == (c = client_get (client)))
3744 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3747 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3748 /* Sanity check for message size */
3749 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3752 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3756 /* Tunnel exists? */
3757 tid = ntohl (peer_msg->tunnel_id);
3758 t = tunnel_get_by_local_id (c, tid);
3762 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3767 /* Does client own tunnel? */
3768 if (t->client->handle != client)
3771 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3776 "MESH: for peer %s\n",
3777 GNUNET_i2s(&peer_msg->peer));
3778 /* Is the peer in the tunnel? */
3779 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3780 &peer_msg->peer.hashPubKey);
3781 if (NULL == peer_info)
3784 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3788 /* Ok, delete peer from tunnel */
3789 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3790 &peer_msg->peer.hashPubKey);
3792 send_destroy_path (t, peer_info->id);
3793 tunnel_delete_peer(t, peer_info->id);
3794 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3800 * Handler for connection requests to new peers by type
3802 * @param cls closure
3803 * @param client identification of the client
3804 * @param message the actual message (ConnectPeerByType)
3807 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3808 const struct GNUNET_MessageHeader *message)
3810 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3811 struct MeshClient *c;
3812 struct MeshTunnel *t;
3813 GNUNET_HashCode hash;
3814 MESH_TunnelNumber tid;
3816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3817 /* Sanity check for client registration */
3818 if (NULL == (c = client_get (client)))
3821 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3825 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3826 /* Sanity check for message size */
3827 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3828 ntohs (connect_msg->header.size))
3831 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3835 /* Tunnel exists? */
3836 tid = ntohl (connect_msg->tunnel_id);
3837 t = tunnel_get_by_local_id (c, tid);
3841 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3845 /* Does client own tunnel? */
3846 if (t->client->handle != client)
3849 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3853 /* Do WE have the service? */
3854 t->type = ntohl (connect_msg->type);
3855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3856 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3857 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3860 /* Yes! Fast forward, add ourselves to the tunnel and send the
3861 * good news to the client
3863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3864 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3865 peer_info_get (&my_full_id),
3866 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3869 send_client_peer_connected(t, myid);
3870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3871 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3874 /* Ok, lets find a peer offering the service */
3875 if (NULL != t->dht_get_type)
3877 GNUNET_DHT_get_stop (t->dht_get_type);
3879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3880 GNUNET_h2s (&hash));
3882 GNUNET_DHT_get_start (dht_handle,
3883 GNUNET_TIME_UNIT_FOREVER_REL,
3884 GNUNET_BLOCK_TYPE_TEST,
3887 GNUNET_DHT_RO_RECORD_ROUTE |
3888 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3890 &dht_get_type_handler, t);
3892 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3898 * Handler for client traffic directed to one peer
3900 * @param cls closure
3901 * @param client identification of the client
3902 * @param message the actual message
3905 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3906 const struct GNUNET_MessageHeader *message)
3908 struct MeshClient *c;
3909 struct MeshTunnel *t;
3910 struct MeshPeerInfo *pi;
3911 struct GNUNET_MESH_Unicast *data_msg;
3912 MESH_TunnelNumber tid;
3915 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3916 "MESH: Got a unicast request from a client!\n");
3918 /* Sanity check for client registration */
3919 if (NULL == (c = client_get (client)))
3922 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3925 data_msg = (struct GNUNET_MESH_Unicast *) message;
3926 /* Sanity check for message size */
3927 size = ntohs (message->size);
3928 if (sizeof (struct GNUNET_MESH_Unicast) +
3929 sizeof (struct GNUNET_MessageHeader) > size)
3932 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3936 /* Tunnel exists? */
3937 tid = ntohl (data_msg->tid);
3938 t = tunnel_get_by_local_id (c, tid);
3942 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3946 /* Is it a local tunnel? Then, does client own the tunnel? */
3947 if (NULL != t->client &&
3948 NULL != t->client->handle &&
3949 t->client->handle != client)
3952 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3956 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3957 &data_msg->destination.hashPubKey);
3958 /* Is the selected peer in the tunnel? */
3962 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3966 /* Ok, everything is correct, send the message
3967 * (pretend we got it from a mesh peer)
3970 char buf[ntohs (message->size)];
3971 struct GNUNET_MESH_Unicast *copy;
3973 /* Work around const limitation */
3974 copy = (struct GNUNET_MESH_Unicast *) buf;
3975 memcpy (buf, data_msg, size);
3976 copy->oid = my_full_id;
3977 copy->tid = htonl (t->id.tid);
3978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3979 "MESH: calling generic handler...\n");
3980 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3982 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3988 * Handler for client traffic directed to the origin
3990 * @param cls closure
3991 * @param client identification of the client
3992 * @param message the actual message
3995 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3996 const struct GNUNET_MessageHeader *message)
3998 struct GNUNET_MESH_ToOrigin *data_msg;
3999 struct GNUNET_PeerIdentity id;
4000 struct MeshClient *c;
4001 struct MeshTunnel *t;
4002 MESH_TunnelNumber tid;
4005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4006 "MESH: Got a ToOrigin request from a client!\n");
4008 /* Sanity check for client registration */
4009 if (NULL == (c = client_get (client)))
4012 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4015 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4016 /* Sanity check for message size */
4017 size = ntohs (message->size);
4018 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4019 sizeof (struct GNUNET_MessageHeader) > size)
4022 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4026 /* Tunnel exists? */
4027 tid = ntohl (data_msg->tid);
4028 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4031 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4034 t = tunnel_get_by_local_id (c, tid);
4038 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4042 /* It shouldn't be a local tunnel. */
4043 if (NULL != t->client)
4046 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4049 GNUNET_PEER_resolve(t->id.oid, &id);
4051 /* Ok, everything is correct, send the message
4052 * (pretend we got it from a mesh peer)
4055 char buf[ntohs (message->size)];
4056 struct GNUNET_MESH_ToOrigin *copy;
4058 /* Work around const limitation */
4059 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4060 memcpy (buf, data_msg, size);
4062 copy->tid = htonl (t->id.tid);
4063 copy->sender = my_full_id;
4064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4065 "MESH: calling generic handler...\n");
4066 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
4068 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4074 * Handler for client traffic directed to all peers in a tunnel
4076 * @param cls closure
4077 * @param client identification of the client
4078 * @param message the actual message
4081 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
4082 const struct GNUNET_MessageHeader *message)
4084 struct MeshClient *c;
4085 struct MeshTunnel *t;
4086 struct GNUNET_MESH_Multicast *data_msg;
4087 MESH_TunnelNumber tid;
4089 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4090 "MESH: Got a multicast request from a client!\n");
4092 /* Sanity check for client registration */
4093 if (NULL == (c = client_get (client)))
4096 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4099 data_msg = (struct GNUNET_MESH_Multicast *) message;
4100 /* Sanity check for message size */
4101 if (sizeof (struct GNUNET_MESH_Multicast) +
4102 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4105 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4109 /* Tunnel exists? */
4110 tid = ntohl (data_msg->tid);
4111 t = tunnel_get_by_local_id (c, tid);
4115 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4119 /* Does client own tunnel? */
4120 if (t->client->handle != client)
4123 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4128 char buf[ntohs(message->size)];
4129 struct GNUNET_MESH_Multicast *copy;
4131 copy = (struct GNUNET_MESH_Multicast *)buf;
4132 memcpy(buf, message, ntohs(message->size));
4133 copy->oid = my_full_id;
4134 copy->tid = htonl(t->id.tid);
4135 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4136 "MESH: calling generic handler...\n");
4137 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4140 /* receive done gets called when last copy is sent to a neighbor */
4145 * Functions to handle messages from clients
4147 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4148 {&handle_local_new_client, NULL,
4149 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4150 {&handle_local_tunnel_create, NULL,
4151 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4152 sizeof (struct GNUNET_MESH_TunnelMessage)},
4153 {&handle_local_tunnel_destroy, NULL,
4154 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4155 sizeof (struct GNUNET_MESH_TunnelMessage)},
4156 {&handle_local_connect_add, NULL,
4157 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4158 sizeof (struct GNUNET_MESH_PeerControl)},
4159 {&handle_local_connect_del, NULL,
4160 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4161 sizeof (struct GNUNET_MESH_PeerControl)},
4162 {&handle_local_connect_by_type, NULL,
4163 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4164 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4165 {&handle_local_unicast, NULL,
4166 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4167 {&handle_local_to_origin, NULL,
4168 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4169 {&handle_local_multicast, NULL,
4170 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4176 * To be called on core init/fail.
4178 * @param cls service closure
4179 * @param server handle to the server for this service
4180 * @param identity the public identity of this peer
4183 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4184 const struct GNUNET_PeerIdentity *identity)
4186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4187 core_handle = server;
4188 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4190 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4191 GNUNET_SCHEDULER_shutdown();
4197 * Method called whenever a given peer connects.
4199 * @param cls closure
4200 * @param peer peer identity this notification is about
4201 * @param atsi performance data for the connection
4202 * @param atsi_count number of records in 'atsi'
4205 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4206 const struct GNUNET_ATS_Information *atsi,
4207 unsigned int atsi_count)
4209 struct MeshPeerInfo *peer_info;
4210 struct MeshPeerPath *path;
4212 #if MESH_DEBUG_CONNECTION
4213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4215 GNUNET_i2s(&my_full_id));
4217 peer_info = peer_info_get (peer);
4218 if (myid == peer_info->id)
4220 #if MESH_DEBUG_CONNECTION
4221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4225 #if MESH_DEBUG_CONNECTION
4228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4232 path = path_new (2);
4233 path->peers[0] = myid;
4234 path->peers[1] = peer_info->id;
4235 GNUNET_PEER_change_rc(myid, 1);
4236 GNUNET_PEER_change_rc(peer_info->id, 1);
4237 path_add_to_peer (peer_info, path, GNUNET_YES);
4242 * Method called whenever a peer disconnects.
4244 * @param cls closure
4245 * @param peer peer identity this notification is about
4248 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4250 struct MeshPeerInfo *pi;
4253 #if MESH_DEBUG_CONNECTION
4254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4256 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4262 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4264 /* TODO: notify that the transmission failed */
4265 peer_info_cancel_transmission(pi, i);
4267 path_remove_from_peer (pi, pi->id, myid);
4268 #if MESH_DEBUG_CONNECTION
4271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4278 /******************************************************************************/
4279 /************************ MAIN FUNCTIONS ****************************/
4280 /******************************************************************************/
4283 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4285 * @param cls closure
4286 * @param key current key code
4287 * @param value value in the hash map
4288 * @return GNUNET_YES if we should continue to iterate,
4292 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4294 struct MeshTunnel *t = value;
4300 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4302 * @param cls closure
4303 * @param key current key code
4304 * @param value value in the hash map
4305 * @return GNUNET_YES if we should continue to iterate,
4309 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4311 struct MeshPeerInfo *p = value;
4312 peer_info_destroy (p);
4317 * Task run during shutdown.
4323 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4326 /* TODO: destroy tunnels? */
4327 if (core_handle != NULL)
4329 GNUNET_CORE_disconnect (core_handle);
4332 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4333 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4334 if (dht_handle != NULL)
4336 GNUNET_DHT_disconnect (dht_handle);
4341 GNUNET_SERVER_notification_context_destroy (nc);
4344 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4346 GNUNET_SCHEDULER_cancel (announce_id_task);
4347 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4349 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4353 * Process mesh requests.
4355 * @param cls closure
4356 * @param server the initialized server
4357 * @param c configuration to use
4360 run (void *cls, struct GNUNET_SERVER_Handle *server,
4361 const struct GNUNET_CONFIGURATION_Handle *c)
4363 struct MeshPeerInfo *peer;
4364 struct MeshPeerPath *p;
4367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4368 server_handle = server;
4369 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4370 CORE_QUEUE_SIZE, /* queue size */
4371 NULL, /* Closure passed to MESH functions */
4372 &core_init, /* Call core_init once connected */
4373 &core_connect, /* Handle connects */
4374 &core_disconnect, /* remove peers on disconnects */
4375 NULL, /* Don't notify about all incoming messages */
4376 GNUNET_NO, /* For header only in notification */
4377 NULL, /* Don't notify about all outbound messages */
4378 GNUNET_NO, /* For header-only out notification */
4379 core_handlers); /* Register these handlers */
4381 if (core_handle == NULL)
4384 GNUNET_SCHEDULER_shutdown ();
4389 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4392 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4394 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4395 GNUNET_SCHEDULER_shutdown ();
4398 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4399 GNUNET_free (keyfile);
4400 if (my_private_key == NULL)
4402 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4403 _("Mesh service could not access hostkey. Exiting.\n"));
4404 GNUNET_SCHEDULER_shutdown ();
4407 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4408 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4409 &my_full_id.hashPubKey);
4410 myid = GNUNET_PEER_intern (&my_full_id);
4412 // // transport_handle = GNUNET_TRANSPORT_connect(c,
4419 dht_handle = GNUNET_DHT_connect (c, 64);
4420 if (dht_handle == NULL)
4426 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4428 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4429 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4430 peers = GNUNET_CONTAINER_multihashmap_create (32);
4431 applications = GNUNET_CONTAINER_multihashmap_create (32);
4432 types = GNUNET_CONTAINER_multihashmap_create (32);
4434 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4435 nc = GNUNET_SERVER_notification_context_create (server_handle,
4437 GNUNET_SERVER_disconnect_notify (server_handle,
4438 &handle_local_client_disconnect,
4443 clients_tail = NULL;
4448 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4449 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4451 /* Create a peer_info for the local peer */
4452 peer = peer_info_get(&my_full_id);
4455 path_add_to_peer(peer, p, GNUNET_YES);
4457 /* Scheduled the task to clean up when shutdown is called */
4458 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4465 * The main function for the mesh service.
4467 * @param argc number of arguments from the command line
4468 * @param argv command line arguments
4469 * @return 0 ok, 1 on error
4472 main (int argc, char *const *argv)
4476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4479 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");