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
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file 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 * - add connection confirmation message
44 * - handle trnsmt_rdy return values
49 #include "mesh_protocol.h"
50 #include "gnunet_dht_service.h"
51 #include "mesh_tunnel_tree.h"
53 /* TODO: move into configuration file */
54 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
55 GNUNET_TIME_UNIT_SECONDS,\
57 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
58 GNUNET_TIME_UNIT_SECONDS,\
61 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
62 GNUNET_TIME_UNIT_SECONDS,\
65 #define GET_RESTART_TIME GNUNET_TIME_relative_multiply(\
66 GNUNET_TIME_UNIT_SECONDS,\
69 /******************************************************************************/
70 /************************ DATA STRUCTURES ****************************/
71 /******************************************************************************/
73 /** FWD declaration */
77 * Struct containing all info possibly needed to build a package when called
80 struct MeshDataDescriptor
82 /** ID of the tunnel this packet travels in */
83 struct MESH_TunnelID *origin;
88 /** Client that asked for the transmission, if any */
89 struct GNUNET_SERVER_Client *client;
91 /** Who was this message being sent to */
92 struct MeshPeerInfo *peer;
94 /** Ultimate destination of the packet */
95 GNUNET_PEER_Id destination;
97 /** Number of identical messages sent to different hops (multicast) */
100 /** Which handler was used to request the transmission */
101 unsigned int handler_n;
103 /** Size of the data */
110 * Struct containing all information regarding a given peer
120 * Last time we heard from this peer
122 struct GNUNET_TIME_Absolute last_contact;
125 * Number of attempts to reconnect so far
127 int n_reconnect_attempts;
130 * Paths to reach the peer, ordered by ascending hop count
132 struct MeshPeerPath *path_head;
135 * Paths to reach the peer, ordered by ascending hop count
137 struct MeshPeerPath *path_tail;
140 * Handle to stop the DHT search for a path to this peer
142 struct GNUNET_DHT_GetHandle *dhtget;
145 * Handles to stop queued transmissions for this peer
147 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
150 * Pointer to info stuctures used as cls for queued transmissions
152 void *infos[CORE_QUEUE_SIZE];
155 * Type of message being in each transmission
157 uint16_t types[CORE_QUEUE_SIZE];
160 * Array of tunnels this peer participates in
161 * (most probably a small amount, therefore not a hashmap)
162 * When the path to the peer changes, notify these tunnels to let them
163 * re-adjust their path trees.
165 struct MeshTunnel **tunnels;
168 * Number of tunnels this peers participates in
170 unsigned int ntunnels;
175 * Data scheduled to transmit (to local client or remote peer)
182 struct MeshQueue *next;
183 struct MeshQueue *prev;
186 * Target of the data (NULL if target is client)
188 struct MeshPeerInfo *peer;
191 * Client to send the data to (NULL if target is peer)
193 struct MeshClient *client;
196 * Size of the message to transmit
201 * How old is the data?
203 struct GNUNET_TIME_Absolute timestamp;
208 struct GNUNET_MessageHeader *data;
212 * Globally unique tunnel identification (owner + number)
213 * DO NOT USE OVER THE NETWORK
218 * Node that owns the tunnel
223 * Tunnel number to differentiate all the tunnels owned by the node oid
224 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
226 MESH_TunnelNumber tid;
230 struct MeshClient; /* FWD declaration */
233 * Struct containing all information regarding a tunnel
234 * For an intermediate node the improtant info used will be:
235 * - id Tunnel unique identification
236 * - paths[0] To know where to send it next
237 * - metainfo: ready, speeds, accounting
244 struct MESH_TunnelID id;
247 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
249 MESH_TunnelNumber local_tid;
252 * Last time the tunnel was used
254 struct GNUNET_TIME_Absolute timestamp;
257 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
259 struct GNUNET_CONTAINER_MultiHashMap *peers;
262 * Number of peers that are connected and potentially ready to receive data
264 unsigned int peers_ready;
267 * Number of peers that have been added to the tunnel
269 unsigned int peers_total;
272 * Client owner of the tunnel, if any
274 struct MeshClient *client;
277 * Messages ready to transmit
279 struct MeshQueue *queue_head;
280 struct MeshQueue *queue_tail;
285 struct MeshTunnelTree *tree;
288 * Application type we are looking for in this tunnel
290 GNUNET_MESH_ApplicationType type;
293 * Used to search peers offering a service
295 struct GNUNET_DHT_GetHandle *dht_get_type;
298 * Task to keep the used paths alive
300 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
305 * Info needed to work with tunnel paths and peers
312 struct MeshTunnel *t;
317 struct MeshPeerInfo *peer;
322 struct MeshPeerPath *path;
325 * Position in peer's transmit queue
332 * Struct containing information about a client of the service
339 struct MeshClient *next;
340 struct MeshClient *prev;
343 * Tunnels that belong to this client, indexed by local id
345 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
348 * Handle to communicate with the client
350 struct GNUNET_SERVER_Client *handle;
353 * Applications that this client has claimed to provide
355 struct GNUNET_CONTAINER_MultiHashMap *apps;
358 * Messages that this client has declared interest in
360 struct GNUNET_CONTAINER_MultiHashMap *types;
364 * ID of the client, for debug messages
373 /******************************************************************************/
374 /************************ DEBUG FUNCTIONS ****************************/
375 /******************************************************************************/
379 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
380 * @param cls string to print
381 * @param tc task context
384 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
388 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
396 /******************************************************************************/
397 /*********************** GLOBAL VARIABLES ****************************/
398 /******************************************************************************/
403 static struct MeshClient *clients;
404 static struct MeshClient *clients_tail;
407 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
409 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
412 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
414 static struct GNUNET_CONTAINER_MultiHashMap *peers;
417 * Handle to communicate with core
419 static struct GNUNET_CORE_Handle *core_handle;
424 static struct GNUNET_DHT_Handle *dht_handle;
429 static struct GNUNET_SERVER_Handle *server_handle;
432 * Notification context, to send messages to local clients
434 static struct GNUNET_SERVER_NotificationContext *nc;
437 * Local peer own ID (memory efficient handle)
439 static GNUNET_PEER_Id myid;
442 * Local peer own ID (full value)
444 static struct GNUNET_PeerIdentity my_full_id;
449 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
454 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
457 * Tunnel ID for the next created tunnel (global tunnel number)
459 static MESH_TunnelNumber next_tid;
462 * Tunnel ID for the next incoming tunnel (local tunnel number)
464 static MESH_TunnelNumber next_local_tid;
467 * All application types provided by this peer
469 static struct GNUNET_CONTAINER_MultiHashMap *applications;
472 * All message types clients of this peer are interested in
474 static struct GNUNET_CONTAINER_MultiHashMap *types;
477 * Task to periodically announce provided applications
479 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
482 * Task to periodically announce itself in the network
484 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
487 unsigned int next_client_id;
491 /******************************************************************************/
492 /************************ ITERATORS ****************************/
493 /******************************************************************************/
495 /* FIXME move iterators here */
498 /******************************************************************************/
499 /************************ PERIODIC FUNCTIONS ****************************/
500 /******************************************************************************/
503 * Announce iterator over for each application provided by the peer
506 * @param key current key code
507 * @param value value in the hash map
508 * @return GNUNET_YES if we should continue to
513 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
515 /* FIXME are hashes in multihash map equal on all aquitectures? */
516 GNUNET_DHT_put (dht_handle,
519 GNUNET_DHT_RO_RECORD_ROUTE |
520 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
521 GNUNET_BLOCK_TYPE_TEST,
522 sizeof (struct GNUNET_PeerIdentity),
523 (const char *) &my_full_id,
525 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
526 &mesh_debug, "DHT_put for app completed");
528 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
530 APP_ANNOUNCE_TIME, NULL, NULL);
537 * Periodically announce what applications are provided by local clients
540 * @param tc task context
543 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
545 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
547 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
551 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
553 announce_applications_task =
554 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
562 * Periodically announce self id in the DHT
565 * @param tc task context
568 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
570 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
572 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
576 * - Set data expiration in function of X
579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
580 GNUNET_h2s_full (&my_full_id.hashPubKey));
581 GNUNET_DHT_put (dht_handle, /* DHT handle */
582 &my_full_id.hashPubKey, /* Key to use */
583 10U, /* Replication level */
584 GNUNET_DHT_RO_RECORD_ROUTE |
585 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
586 GNUNET_BLOCK_TYPE_TEST, /* Block type */
587 sizeof(my_full_id), /* Size of the data */
588 (char *)&my_full_id, /* Data itself */
589 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
590 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
592 &mesh_debug, "DHT_put for id completed");
594 NULL, /* Continuation */
595 NULL); /* Continuation closure */
598 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
603 * Function to process paths received for a new peer addition. The recorded
604 * paths form the initial tunnel, which can be optimized later.
605 * Called on each result obtained for the DHT search.
608 * @param exp when will this value expire
609 * @param key key of the result
610 * @param type type of the result
611 * @param size number of bytes in data
612 * @param data pointer to the result data
615 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
616 const GNUNET_HashCode * key,
617 const struct GNUNET_PeerIdentity *get_path,
618 unsigned int get_path_length,
619 const struct GNUNET_PeerIdentity *put_path,
620 unsigned int put_path_length,
621 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
624 /******************************************************************************/
625 /****************** GENERAL HELPER FUNCTIONS ************************/
626 /******************************************************************************/
629 * Check if client has registered with the service and has not disconnected
631 * @param client the client to check
633 * @return non-NULL if client exists in the global DLL
635 static struct MeshClient *
636 client_get (struct GNUNET_SERVER_Client *client)
638 struct MeshClient *c;
643 if (c->handle == client)
652 * Checks if a given client has subscribed to certain message type
654 * @param message_type Type of message to check
655 * @param c Client to check
657 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
662 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
666 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
667 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
672 * Send the message to all clients that have subscribed to its type
674 * @param msg Pointer to the message itself
675 * @return number of clients this message was sent to
678 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
680 struct MeshClient *c;
684 type = ntohs (msg->type);
685 for (count = 0, c = clients; c != NULL; c = c->next)
687 if (client_is_subscribed (type, c))
690 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
699 * Notify the client that owns the tunnel that a peer has connected to it
701 * @param t Tunnel whose owner to notify
702 * @param id Short id of the peer that has connected
705 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
707 struct GNUNET_MESH_PeerControl pc;
709 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
710 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
711 pc.tunnel_id = htonl (t->local_tid);
712 GNUNET_PEER_resolve (id, &pc.peer);
713 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
714 &pc.header, GNUNET_NO);
719 * Function called to notify a client about the socket
720 * being ready to queue more data. "buf" will be
721 * NULL and "size" zero if the socket was closed for
722 * writing in the meantime.
725 * @param size number of bytes available in buf
726 * @param buf where the callee should write the message
727 * @return number of bytes written to buf
730 send_core_create_path (void *cls, size_t size, void *buf);
733 * Cancel a core transmission that was already requested and free all resources
734 * associated to the request.
736 * @param peer PeeInfo of the peer whose transmission is cancelled.
737 * @param i Position of the transmission to be cancelled.
740 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
742 if (peer->core_transmit[i])
744 struct MeshDataDescriptor *dd;
745 struct MeshPathInfo *path_info;
746 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
747 /* TODO: notify that tranmission has failed */
748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
749 "MESH: Cancelled data transmission at %u\n",
751 switch (peer->types[i])
753 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
754 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
755 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
758 if (0 == --(*dd->copies))
760 GNUNET_free (dd->copies);
761 GNUNET_free (dd->data);
764 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
766 path_info = peer->infos[i];
767 path_destroy(path_info->path);
770 GNUNET_free (peer->infos[i]);
779 peer_info_transmit_position (struct MeshPeerInfo *peer)
783 for (i = 0; peer->core_transmit[i]; i++)
785 if (i == (CORE_QUEUE_SIZE - 1))
787 /* All positions are taken! Overwriting! */
789 peer_info_cancel_transmission(peer, 0);
798 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
799 * and insert it in the appropiate structures if the peer is not known yet.
801 * @param peer Full identity of the peer.
803 * @return Existing or newly created peer info.
805 static struct MeshPeerInfo *
806 peer_info_get (const struct GNUNET_PeerIdentity *peer)
808 struct MeshPeerInfo *peer_info;
810 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
811 if (NULL == peer_info)
814 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
815 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
816 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
817 peer_info->id = GNUNET_PEER_intern (peer);
825 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
826 * and insert it in the appropiate structures if the peer is not known yet.
828 * @param peer Short identity of the peer.
830 * @return Existing or newly created peer info.
832 static struct MeshPeerInfo *
833 peer_info_get_short (const GNUNET_PEER_Id peer)
835 struct GNUNET_PeerIdentity id;
837 GNUNET_PEER_resolve(peer, &id);
838 return peer_info_get(&id);
843 * Sends a CREATE PATH message for a path to a peer, properly registrating
844 * all used resources.
846 * @param peer PeerInfo of the final peer for whom this path is being created.
847 * @param p Path itself.
848 * @param t Tunnel for which the path is created.
851 send_create_path (struct MeshPeerInfo *peer,
852 struct MeshPeerPath *p,
853 struct MeshTunnel *t)
855 struct GNUNET_PeerIdentity *id;
856 struct MeshPathInfo *path_info;
857 struct MeshPeerInfo *neighbor;
859 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
861 path_info->peer = peer;
863 id = path_get_first_hop(t->tree, peer->id);
864 neighbor = peer_info_get(id);
865 path_info->pos = peer_info_transmit_position(neighbor);
866 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
867 neighbor->infos[path_info->pos] = path_info;
868 neighbor->core_transmit[path_info->pos] =
869 GNUNET_CORE_notify_transmit_ready (
870 core_handle, /* handle */
873 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
875 sizeof (struct GNUNET_MESH_ManipulatePath)
876 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
877 &send_core_create_path, /* callback */
878 path_info); /* cls */
884 * Try to establish a new connection to this peer.
885 * Use the best path for the given tunnel.
886 * If the peer doesn't have any path to it yet, try to get one.
887 * If the peer already has some path, send a CREATE PATH towards it.
889 * @param peer PeerInfo of the peer.
890 * @param t Tunnel for which to create the path, if possible.
893 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
895 struct MeshPeerPath *p;
896 struct MeshPathInfo *path_info;
898 if (NULL != peer->path_head)
900 p = tree_get_path_to_peer(t->tree, peer->id);
903 send_create_path(peer, p, t);
907 send_client_peer_connected(t, myid);
910 else if (NULL == peer->dhtget)
912 struct GNUNET_PeerIdentity id;
914 GNUNET_PEER_resolve(peer->id, &id);
915 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
916 path_info->peer = peer;
919 GNUNET_DHT_get_start(dht_handle, /* handle */
920 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
921 GNUNET_BLOCK_TYPE_TEST, /* type */
922 &id.hashPubKey, /* key to search */
923 4, /* replication level */
924 GNUNET_DHT_RO_RECORD_ROUTE |
925 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
931 /* Otherwise, there is no path but the DHT get is already started. */
937 * Destroy the peer_info and free any allocated resources linked to it
938 * @param t tunnel the path belongs to
939 * @param pi the peer_info to destroy
940 * @return GNUNET_OK on success
943 peer_info_destroy (struct MeshPeerInfo *pi)
945 GNUNET_HashCode hash;
946 struct GNUNET_PeerIdentity id;
948 GNUNET_PEER_resolve (pi->id, &id);
949 GNUNET_PEER_change_rc (pi->id, -1);
950 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
952 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
953 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
961 * Notify a tunnel that a connection has broken that affects at least
964 * @param t Tunnel affected.
965 * @param peer Peer that (at least) has been affected by the disconnection.
966 * @param p1 Peer that got disconnected from p2.
967 * @param p2 Peer that got disconnected from p1.
969 * @return Short ID of the peer disconnected (either p1 or p2).
970 * 0 if the tunnel remained unaffected.
972 static GNUNET_PEER_Id
973 tunnel_notify_connection_broken (struct MeshTunnel *t,
974 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
978 * Remove all paths that rely on a direct connection between p1 and p2
979 * from the peer itself and notify all tunnels about it.
981 * @param peer PeerInfo of affected peer.
982 * @param p1 GNUNET_PEER_Id of one peer.
983 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
986 * TODO: optimize (see below)
989 path_remove_from_peer (struct MeshPeerInfo *peer,
993 struct GNUNET_PeerIdentity id;
994 struct MeshPeerPath *p;
995 struct MeshPeerPath *aux;
996 struct MeshPeerInfo *peer_d;
998 unsigned int destroyed;
1004 p = peer->path_head;
1008 for (i = 0; i < (p->length - 1); i++)
1010 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1011 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1023 for (i = 0; i < peer->ntunnels; i++)
1025 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
1027 * Problem: one or more peers have been deleted from the tunnel tree.
1028 * We don't know who they are to try to add them again.
1029 * We need to try to find a new path for each of the disconnected peers.
1030 * Some of them might already have a path to reach them that does not
1031 * involve p1 and p2. Adding all anew might render in a better tree than
1032 * the trivial immediate fix.
1034 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1035 * its children will be reachable trough him.
1037 peer_d = peer_info_get_short(d);
1040 for (p = peer_d->path_head; NULL != p; p = p->next)
1042 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1050 /* No callback, as peer will be already disconnected */
1051 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1055 struct MeshPathInfo *path_info;
1057 if (NULL != peer_d->dhtget)
1059 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1060 path_info->path = p;
1061 path_info->peer = peer_d;
1062 path_info->t = peer->tunnels[i];
1064 GNUNET_DHT_get_start(dht_handle, /* handle */
1065 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1066 GNUNET_BLOCK_TYPE_TEST, /* type */
1067 &id.hashPubKey, /*key to search */
1068 4, /* replication level */
1069 GNUNET_DHT_RO_RECORD_ROUTE |
1070 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1072 0, /* xquery bits */
1073 &dht_get_id_handler,
1074 (void *) path_info);
1081 * Add the path to the peer and update the path used to reach it in case this
1084 * @param peer_info Destination peer to add the path to.
1085 * @param path New path to add. Last peer must be the peer in arg 1.
1086 * Path will be either used of freed if already known.
1088 * TODO: trim the part from origin to us? Add it as path to origin?
1091 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1093 struct MeshPeerPath *aux;
1097 if (NULL == peer_info || NULL == path)
1103 l = path_get_length (path);
1110 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1112 l2 = path_get_length (aux);
1115 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1116 peer_info->path_tail, aux, path);
1120 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1127 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1134 * Add the path to the origin peer and update the path used to reach it in case
1135 * this is the shortest.
1136 * The path is given in peer_info -> destination, therefore we turn the path
1137 * upside down first.
1139 * @param peer_info Peer to add the path to, being the origin of the path.
1140 * @param path New path to add after being inversed.
1143 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1146 path_add_to_peer (peer_info, path);
1151 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1152 * to obtain a local peer -> destination path and interning the peer ids.
1154 * @return Newly allocated and created path
1156 static struct MeshPeerPath *
1157 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1158 unsigned int get_path_length,
1159 const struct GNUNET_PeerIdentity *put_path,
1160 unsigned int put_path_length)
1162 struct MeshPeerPath *p;
1168 GNUNET_PEER_change_rc(myid, 1);
1169 i = get_path_length;
1170 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1171 for (i--; i >= 0; i--)
1173 id = GNUNET_PEER_intern (&get_path[i]);
1174 if (p->length > 0 && id == p->peers[p->length - 1])
1176 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1177 GNUNET_PEER_change_rc(id, -1);
1181 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1182 "MESH: Adding from GET: %s.\n",
1183 GNUNET_i2s(&get_path[i]));
1185 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1186 p->peers[p->length - 1] = id;
1189 i = put_path_length;
1190 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1191 for (i--; i >= 0; i--)
1193 id = GNUNET_PEER_intern (&put_path[i]);
1196 /* PUT path went through us, so discard the path up until now and start
1197 * from here to get a much shorter (and loop-free) path.
1202 if (p->length > 0 && id == p->peers[p->length - 1])
1204 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1205 GNUNET_PEER_change_rc(id, -1);
1209 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1210 "MESH: Adding from PUT: %s.\n",
1211 GNUNET_i2s(&put_path[i]));
1213 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1214 p->peers[p->length - 1] = id;
1218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1219 "MESH: (first of GET: %s)\n",
1220 GNUNET_h2s_full(&get_path[0].hashPubKey));
1221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1222 "MESH: (first of PUT: %s)\n",
1223 GNUNET_h2s_full(&put_path[0].hashPubKey));
1224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1225 "MESH: In total: %d hops\n",
1227 for (i = 0; i < p->length; i++)
1229 struct GNUNET_PeerIdentity peer_id;
1231 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1235 GNUNET_h2s_full(&peer_id.hashPubKey));
1243 * Send keepalive packets for a peer
1245 * @param cls Closure (tunnel for which to send the keepalive).
1246 * @param tc Notification context.
1248 * TODO: implement explicit multicast keepalive?
1251 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1255 * Search for a tunnel among the tunnels for a client
1257 * @param c the client whose tunnels to search in
1258 * @param tid the local id of the tunnel
1260 * @return tunnel handler, NULL if doesn't exist
1262 static struct MeshTunnel *
1263 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1265 GNUNET_HashCode hash;
1267 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1268 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1273 * Search for a tunnel by global ID using PEER_ID
1275 * @param pi owner of the tunnel
1276 * @param tid global tunnel number
1278 * @return tunnel handler, NULL if doesn't exist
1280 static struct MeshTunnel *
1281 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1283 struct MESH_TunnelID id;
1284 GNUNET_HashCode hash;
1289 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1290 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1295 * Search for a tunnel by global ID using full PeerIdentities
1297 * @param oid owner of the tunnel
1298 * @param tid global tunnel number
1300 * @return tunnel handler, NULL if doesn't exist
1302 static struct MeshTunnel *
1303 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1305 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1310 * Callback used to notify a client owner of a tunnel that a peer has
1311 * disconnected, most likely because of a path change.
1313 * @param n Node in the tree representing the disconnected peer
1316 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1318 struct MeshPeerInfo *peer;
1320 if (NULL != n->t->client && NULL != nc)
1322 struct GNUNET_MESH_PeerControl msg;
1323 msg.header.size = htons (sizeof (msg));
1324 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1325 msg.tunnel_id = htonl (n->t->local_tid);
1326 GNUNET_PEER_resolve (n->peer, &msg.peer);
1327 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1328 &msg.header, GNUNET_NO);
1330 peer = peer_info_get_short(n->peer);
1331 peer_info_connect(peer, n->t);
1336 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1337 * needed rescources.
1338 * If peer already exists, reevaluate shortest path and change if different.
1340 * @param t Tunnel we want to add a new peer to
1341 * @param peer PeerInfo of the peer being added
1345 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1347 struct GNUNET_PeerIdentity id;
1348 struct MeshPeerPath *best_p;
1349 struct MeshPeerPath *p;
1350 unsigned int best_cost;
1353 GNUNET_PEER_resolve(peer->id, &id);
1355 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1358 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1359 GNUNET_CONTAINER_multihashmap_put(
1363 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1366 if (NULL != (p = peer->path_head))
1369 best_cost = UINT_MAX;
1372 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1379 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1380 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1381 t->path_refresh_task =
1382 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1386 /* Start a DHT get if necessary */
1387 peer_info_connect(peer, t);
1393 * Notify a tunnel that a connection has broken that affects at least
1394 * some of its peers.
1396 * @param t Tunnel affected.
1397 * @param peer Peer that (at least) has been affected by the disconnection.
1398 * @param p1 Peer that got disconnected from p2.
1399 * @param p2 Peer that got disconnected from p1.
1401 * @return Short ID of the peer disconnected (either p1 or p2).
1402 * 0 if the tunnel remained unaffected.
1404 static GNUNET_PEER_Id
1405 tunnel_notify_connection_broken (struct MeshTunnel *t,
1406 struct MeshPeerInfo *peer,
1410 return tree_notify_connection_broken (t->tree, p1, p2,
1411 ¬ify_peer_disconnected);
1416 * Destroy the tunnel and free any allocated resources linked to it
1418 * @param t the tunnel to destroy
1420 * @return GNUNET_OK on success
1423 tunnel_destroy (struct MeshTunnel *t)
1425 struct MeshClient *c;
1426 struct MeshQueue *q;
1427 struct MeshQueue *qn;
1428 GNUNET_HashCode hash;
1431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1437 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1440 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1441 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1446 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1447 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1451 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1455 if (NULL != q->data)
1456 GNUNET_free (q->data);
1460 /* TODO cancel core transmit ready in case it was active */
1462 tree_destroy(t->tree);
1463 if (NULL != t->dht_get_type)
1464 GNUNET_DHT_get_stop(t->dht_get_type);
1465 t->dht_get_type = NULL;
1472 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1473 * client when the client disconnects.
1475 * @param cls closure (client that is disconnecting)
1476 * @param key the hash of the local tunnel id (used to access the hashmap)
1477 * @param value the value stored at the key (tunnel to destroy)
1479 * @return GNUNET_OK on success
1482 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1484 struct MeshTunnel *t = value;
1487 if (NULL != t->dht_get_type)
1489 GNUNET_DHT_get_stop (t->dht_get_type);
1491 r = tunnel_destroy (t);
1496 /******************************************************************************/
1497 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1498 /******************************************************************************/
1501 * Function called to notify a client about the socket
1502 * being ready to queue more data. "buf" will be
1503 * NULL and "size" zero if the socket was closed for
1504 * writing in the meantime.
1506 * @param cls closure
1507 * @param size number of bytes available in buf
1508 * @param buf where the callee should write the message
1509 * @return number of bytes written to buf
1512 send_core_create_path (void *cls, size_t size, void *buf)
1514 struct MeshPathInfo *info = cls;
1515 struct GNUNET_MESH_ManipulatePath *msg;
1516 struct GNUNET_PeerIdentity *peer_ptr;
1517 struct MeshPeerInfo *peer = info->peer;
1518 struct MeshTunnel *t = info->t;
1519 struct MeshPeerPath *p = info->path;
1524 sizeof (struct GNUNET_MESH_ManipulatePath) +
1525 p->length * sizeof (struct GNUNET_PeerIdentity);
1527 if (size < size_needed || NULL == buf)
1529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
1530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
1531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
1533 info->peer->core_transmit[info->pos] =
1534 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1535 GNUNET_TIME_UNIT_FOREVER_REL,
1536 path_get_first_hop (t->tree, peer->id),
1538 &send_core_create_path,
1543 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1544 msg->header.size = htons (size_needed);
1545 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1546 msg->tid = ntohl (t->id.tid);
1548 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1549 for (i = 0; i < p->length; i++)
1551 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1557 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1558 "MESH: CREATE PATH (%u bytes long) sent!\n",
1566 * Function called to notify a client about the socket
1567 * being ready to queue more data. "buf" will be
1568 * NULL and "size" zero if the socket was closed for
1569 * writing in the meantime.
1571 * @param cls closure (MeshDataDescriptor with all info to build packet)
1572 * @param size number of bytes available in buf
1573 * @param buf where the callee should write the message
1574 * @return number of bytes written to buf
1577 send_core_data_to_origin (void *cls, size_t size, void *buf)
1579 struct MeshDataDescriptor *info = cls;
1580 struct GNUNET_MESH_ToOrigin *msg = buf;
1583 GNUNET_assert (NULL != info);
1584 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1585 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1587 if (total_size > size)
1589 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1590 "not enough buffer to send data to origin\n");
1593 msg->header.size = htons (total_size);
1594 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1595 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1596 msg->tid = htonl (info->origin->tid);
1597 if (0 != info->size)
1599 memcpy (&msg[1], &info[1], info->size);
1601 if (NULL != info->client)
1603 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1612 * Function called to notify a client about the socket
1613 * being ready to queue more data. "buf" will be
1614 * NULL and "size" zero if the socket was closed for
1615 * writing in the meantime.
1617 * @param cls closure (data itself)
1618 * @param size number of bytes available in buf
1619 * @param buf where the callee should write the message
1621 * @return number of bytes written to buf
1624 send_core_data_multicast (void *cls, size_t size, void *buf)
1626 struct MeshDataDescriptor *info = cls;
1627 struct GNUNET_MESH_Multicast *msg = buf;
1630 GNUNET_assert (NULL != info);
1631 GNUNET_assert (NULL != info->peer);
1632 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1633 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1635 if (total_size > size)
1638 struct GNUNET_PeerIdentity id;
1640 GNUNET_PEER_resolve(info->peer->id, &id);
1641 info->peer->infos[info->handler_n] = info;
1642 info->peer->types[info->handler_n] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1643 info->peer->core_transmit[info->handler_n] =
1644 GNUNET_CORE_notify_transmit_ready (core_handle,
1647 GNUNET_TIME_UNIT_FOREVER_REL,
1650 &send_core_data_multicast,
1654 info->peer->core_transmit[info->handler_n] = NULL;
1655 info->peer->infos[info->handler_n] = NULL;
1656 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1657 msg->header.size = htons (total_size);
1658 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1659 msg->tid = htonl (info->origin->tid);
1660 memcpy (&msg[1], info->data, info->size);
1661 if (0 == --(*info->copies))
1663 if (NULL != info->client)
1665 /* FIXME One unresponsive neighbor (who doesn't "call" tmt_rdy) can lock
1666 * the client from sending anything else to the service.
1667 * - Call receive_done after certain timeout.
1668 * - Here cancel the timeout.
1670 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1672 GNUNET_free (info->data);
1673 GNUNET_free (info->copies);
1681 * Function called to notify a client about the socket
1682 * being ready to queue more data. "buf" will be
1683 * NULL and "size" zero if the socket was closed for
1684 * writing in the meantime.
1686 * @param cls closure (MeshDataDescriptor)
1687 * @param size number of bytes available in buf
1688 * @param buf where the callee should write the message
1689 * @return number of bytes written to buf
1692 send_core_path_ack (void *cls, size_t size, void *buf)
1694 struct MeshDataDescriptor *info = cls;
1695 struct GNUNET_MESH_PathACK *msg = buf;
1697 GNUNET_assert (NULL != info);
1700 info->peer->core_transmit[info->handler_n] = NULL;
1702 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1707 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1708 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1709 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1710 msg->tid = htonl (info->origin->tid);
1711 msg->peer_id = my_full_id;
1713 /* TODO add signature */
1715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
1716 return sizeof (struct GNUNET_MESH_PathACK);
1721 * Function called to notify a client about the socket
1722 * being ready to queue more data. "buf" will be
1723 * NULL and "size" zero if the socket was closed for
1724 * writing in the meantime.
1726 * @param cls closure (data itself)
1727 * @param size number of bytes available in buf
1728 * @param buf where the callee should write the message
1729 * @return number of bytes written to buf
1732 send_core_data_raw (void *cls, size_t size, void *buf)
1734 struct GNUNET_MessageHeader *msg = cls;
1737 GNUNET_assert (NULL != msg);
1738 total_size = ntohs (msg->size);
1740 if (total_size > size)
1745 memcpy (buf, msg, total_size);
1753 * Send another peer a notification to destroy a tunnel
1754 * @param cls The tunnel to destroy
1755 * @param size Size in the buffer
1756 * @param buf Memory where to put the data to transmit
1757 * @return Size of data put in buffer
1760 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1762 struct MeshTunnel *t = cls;
1763 struct MeshClient *c;
1764 struct GNUNET_MESH_TunnelMessage *msg;
1768 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1769 /*FIXME*/ msg->header.size =
1770 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1771 msg->tunnel_id = htonl (t->id.tid);
1773 tunnel_destroy (c, t);
1774 return sizeof (struct GNUNET_MESH_TunnelMessage);
1779 /******************************************************************************/
1780 /******************** MESH NETWORK HANDLERS **************************/
1781 /******************************************************************************/
1785 * Core handler for path creation
1786 * struct GNUNET_CORE_MessageHandler
1788 * @param cls closure
1789 * @param message message
1790 * @param peer peer identity this notification is about
1791 * @param atsi performance data
1792 * @return GNUNET_OK to keep the connection open,
1793 * GNUNET_SYSERR to close it (signal serious error)
1797 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1798 const struct GNUNET_MessageHeader *message,
1799 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1801 unsigned int own_pos;
1804 MESH_TunnelNumber tid;
1805 struct GNUNET_MESH_ManipulatePath *msg;
1806 struct GNUNET_PeerIdentity *pi;
1807 GNUNET_HashCode hash;
1808 struct MeshPeerPath *path;
1809 struct MeshPeerInfo *dest_peer_info;
1810 struct MeshPeerInfo *orig_peer_info;
1811 struct MeshTunnel *t;
1813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1814 "MESH: Received a path create msg\n");
1815 size = ntohs (message->size);
1816 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1818 GNUNET_break_op (0);
1822 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1823 if (size % sizeof (struct GNUNET_PeerIdentity))
1825 GNUNET_break_op (0);
1828 size /= sizeof (struct GNUNET_PeerIdentity);
1831 GNUNET_break_op (0);
1834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1835 "MESH: path as %u hops.\n",
1837 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1839 tid = ntohl (msg->tid);
1840 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1841 t = tunnel_get (pi, tid);
1842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1843 "MESH: path is for tunnel %s [%X].\n",
1848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1849 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1850 t->id.oid = GNUNET_PEER_intern (pi);
1852 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1853 t->local_tid = next_local_tid++;
1854 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
1856 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1858 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1859 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1866 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1867 if (NULL == dest_peer_info)
1869 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1870 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1871 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1873 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1875 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1876 if (NULL == orig_peer_info)
1878 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1879 orig_peer_info->id = GNUNET_PEER_intern (pi);
1880 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1881 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1884 path = path_new (size);
1886 for (i = 0; i < size; i++)
1888 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1889 if (path->peers[i] == myid)
1893 { /* cannot be self, must be 'not found' */
1894 /* create path: self not found in path through self */
1895 GNUNET_break_op (0);
1896 path_destroy (path);
1897 /* FIXME error. destroy tunnel? leave for timeout? */
1900 if (own_pos == size - 1)
1902 /* It is for us! Send ack. */
1903 struct GNUNET_MESH_TunnelNotification cmsg;
1904 struct MeshDataDescriptor *info;
1907 path_add_to_origin (orig_peer_info, path); /* inverts path! */
1908 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1909 info->origin = &t->id;
1910 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1911 GNUNET_assert (NULL != info->peer);
1912 for (j = 0; info->peer->core_transmit[j]; j++)
1914 if (j == (CORE_QUEUE_SIZE - 1))
1920 info->handler_n = j;
1921 info->peer->core_transmit[j] =
1922 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1923 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1924 sizeof (struct GNUNET_MESH_PathACK),
1925 &send_core_path_ack, info);
1926 cmsg.header.size = htons(sizeof(cmsg));
1927 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1928 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
1929 cmsg.tunnel_id = htonl(t->local_tid);
1930 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
1934 /* It's for somebody else! Retransmit. */
1935 send_create_path(dest_peer_info, path, t);
1942 * Core handler for mesh network traffic going from the origin to a peer
1944 * @param cls closure
1945 * @param peer peer identity this notification is about
1946 * @param message message
1947 * @param atsi performance data
1948 * @return GNUNET_OK to keep the connection open,
1949 * GNUNET_SYSERR to close it (signal serious error)
1952 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1953 const struct GNUNET_MessageHeader *message,
1954 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1956 struct GNUNET_MESH_Unicast *msg;
1957 struct MeshTunnel *t;
1958 struct MeshPeerInfo *pi;
1961 size = ntohs (message->size);
1963 sizeof (struct GNUNET_MESH_Unicast) +
1964 sizeof (struct GNUNET_MessageHeader))
1969 msg = (struct GNUNET_MESH_Unicast *) message;
1970 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1973 /* TODO notify back: we don't know this tunnel */
1974 GNUNET_break_op (0);
1977 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1978 &msg->destination.hashPubKey);
1981 /* TODO maybe feedback, log to statistics */
1982 GNUNET_break_op (0);
1987 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1990 msg = GNUNET_malloc (size);
1991 memcpy (msg, message, size);
1992 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1993 GNUNET_TIME_UNIT_FOREVER_REL,
1994 path_get_first_hop (t->tree, pi->id),
1996 &send_core_data_raw, msg);
2002 * Core handler for mesh network traffic going from the origin to all peers
2004 * @param cls closure
2005 * @param message message
2006 * @param peer peer identity this notification is about
2007 * @param atsi performance data
2008 * @return GNUNET_OK to keep the connection open,
2009 * GNUNET_SYSERR to close it (signal serious error)
2011 * TODO: Check who we got this from, to validate route.
2014 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2015 const struct GNUNET_MessageHeader *message,
2016 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2018 struct GNUNET_MESH_Multicast *msg;
2019 struct GNUNET_PeerIdentity *id;
2020 struct MeshDataDescriptor *info;
2021 struct MeshTunnelTreeNode *n;
2022 struct MeshTunnel *t;
2023 unsigned int *copies;
2028 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Multicast);
2029 if (size < sizeof (struct GNUNET_MessageHeader))
2031 GNUNET_break_op (0);
2034 msg = (struct GNUNET_MESH_Multicast *) message;
2035 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2039 /* TODO notify that we dont know that tunnel */
2040 GNUNET_break_op (0);
2044 /* Transmit to locally interested clients */
2045 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2047 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2049 n = t->tree->me->children_head;
2052 copies = GNUNET_malloc (sizeof (unsigned int));
2053 for (*copies = 0; NULL != n; n = n->next)
2055 n = t->tree->me->children_head;
2056 data = GNUNET_malloc (size);
2057 memcpy (data, &msg[1], size);
2060 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2061 info->origin = &t->id;
2064 info->copies = copies;
2065 info->client = t->client->handle;
2066 info->destination = n->peer;
2067 id = path_get_first_hop(t->tree, n->peer);
2068 info->peer = peer_info_get(id);
2069 GNUNET_assert (NULL != info->peer);
2070 for (i = 0; NULL != info->peer->core_transmit[i]; i++)
2072 if (i == (CORE_QUEUE_SIZE - 1))
2078 info->handler_n = i;
2079 info->peer->infos[i] = info;
2080 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2081 info->peer->core_transmit[i] =
2082 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2083 GNUNET_TIME_UNIT_FOREVER_REL, id,
2084 ntohs (msg->header.size),
2085 &send_core_data_multicast, info);
2093 * Core handler for mesh network traffic
2095 * @param cls closure
2096 * @param message message
2097 * @param peer peer identity this notification is about
2098 * @param atsi performance data
2100 * @return GNUNET_OK to keep the connection open,
2101 * GNUNET_SYSERR to close it (signal serious error)
2104 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2105 const struct GNUNET_MessageHeader *message,
2106 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2108 struct GNUNET_MESH_ToOrigin *msg;
2109 struct GNUNET_PeerIdentity id;
2110 struct MeshPeerInfo *peer_info;
2111 struct MeshTunnel *t;
2114 size = ntohs (message->size);
2115 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2116 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2118 GNUNET_break_op (0);
2121 msg = (struct GNUNET_MESH_ToOrigin *) message;
2122 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2126 /* TODO notify that we dont know this tunnel (whom)? */
2130 if (t->id.oid == myid)
2132 if (NULL == t->client)
2134 /* got data packet for ownerless tunnel */
2135 GNUNET_break_op (0);
2138 /* TODO signature verification */
2139 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
2143 peer_info = peer_info_get (&msg->oid);
2144 if (NULL == peer_info)
2146 /* unknown origin of tunnel */
2150 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2151 msg = GNUNET_malloc (size);
2152 memcpy (msg, message, size);
2153 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2154 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2155 &send_core_data_raw, msg);
2162 * Core handler for path ACKs
2164 * @param cls closure
2165 * @param message message
2166 * @param peer peer identity this notification is about
2167 * @param atsi performance data
2169 * @return GNUNET_OK to keep the connection open,
2170 * GNUNET_SYSERR to close it (signal serious error)
2173 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2174 const struct GNUNET_MessageHeader *message,
2175 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2177 struct GNUNET_MESH_PathACK *msg;
2178 struct MeshTunnelTreeNode *n;
2179 struct MeshPeerInfo *peer_info;
2180 struct MeshTunnel *t;
2182 msg = (struct GNUNET_MESH_PathACK *) message;
2183 t = tunnel_get (&msg->oid, msg->tid);
2186 /* TODO notify that we don't know the tunnel */
2190 /* Message for us? */
2191 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2193 if (NULL == t->client)
2195 GNUNET_break_op (0);
2198 peer_info = peer_info_get (&msg->peer_id);
2199 if (NULL == peer_info)
2201 GNUNET_break_op (0);
2204 n = tree_find_peer(t->tree->root, peer_info->id);
2207 GNUNET_break_op (0);
2210 n->status = MESH_PEER_READY;
2211 send_client_peer_connected(t, peer_info->id);
2215 peer_info = peer_info_get (&msg->oid);
2216 if (NULL == peer_info)
2218 /* If we know the tunnel, we should DEFINITELY know the peer */
2222 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2223 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2224 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2225 GNUNET_TIME_UNIT_FOREVER_REL,
2226 path_get_first_hop (t->tree,
2228 sizeof (struct GNUNET_MESH_PathACK),
2229 &send_core_data_raw, msg);
2235 * Functions to handle messages from core
2237 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2238 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2239 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2240 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2241 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2242 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2243 sizeof (struct GNUNET_MESH_PathACK)},
2249 /******************************************************************************/
2250 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2251 /******************************************************************************/
2254 * deregister_app: iterator for removing each application registered by a client
2256 * @param cls closure
2257 * @param key the hash of the application id (used to access the hashmap)
2258 * @param value the value stored at the key (client)
2260 * @return GNUNET_OK on success
2263 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2265 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2271 * notify_client_connection_failure: notify a client that the connection to the
2272 * requested remote peer is not possible (for instance, no route found)
2273 * Function called when the socket is ready to queue more data. "buf" will be
2274 * NULL and "size" zero if the socket was closed for writing in the meantime.
2276 * @param cls closure
2277 * @param size number of bytes available in buf
2278 * @param buf where the callee should write the message
2279 * @return number of bytes written to buf
2282 notify_client_connection_failure (void *cls, size_t size, void *buf)
2285 struct MeshPeerInfo *peer_info;
2286 struct GNUNET_MESH_PeerControl *msg;
2287 struct GNUNET_PeerIdentity id;
2289 if (0 == size && NULL == buf)
2291 // TODO retry? cancel?
2295 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2296 peer_info = (struct MeshPeerInfo *) cls;
2297 msg = (struct GNUNET_MESH_PeerControl *) buf;
2298 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2299 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2300 // msg->tunnel_id = htonl(peer_info->t->tid);
2301 GNUNET_PEER_resolve (peer_info->id, &id);
2302 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2310 * Send keepalive packets for a peer
2312 * @param cls Closure (tunnel for which to send the keepalive).
2313 * @param tc Notification context.
2315 * TODO: implement explicit multicast keepalive?
2318 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2320 struct MeshTunnel *t = cls;
2321 struct GNUNET_MessageHeader *payload;
2322 struct GNUNET_MESH_Multicast *msg;
2325 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2326 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2332 "MESH: sending keepalive for tunnel %d\n",
2335 size = sizeof(struct GNUNET_MESH_Multicast) +
2336 sizeof(struct GNUNET_MessageHeader);
2337 msg = GNUNET_malloc (size);
2338 msg->header.size = htons (size);
2339 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2340 msg->oid = my_full_id;
2341 msg->tid = htonl(t->id.tid);
2342 payload = (struct GNUNET_MessageHeader *) &msg[1];
2343 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2344 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2345 handle_mesh_data_multicast (NULL, &my_full_id, &msg->header, NULL);
2348 t->path_refresh_task =
2349 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
2355 * Function to process paths received for a new peer addition. The recorded
2356 * paths form the initial tunnel, which can be optimized later.
2357 * Called on each result obtained for the DHT search.
2359 * @param cls closure
2360 * @param exp when will this value expire
2361 * @param key key of the result
2362 * @param type type of the result
2363 * @param size number of bytes in data
2364 * @param data pointer to the result data
2366 * TODO: re-issue the request after certain time? cancel after X results?
2369 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2370 const GNUNET_HashCode * key,
2371 const struct GNUNET_PeerIdentity *get_path,
2372 unsigned int get_path_length,
2373 const struct GNUNET_PeerIdentity *put_path,
2374 unsigned int put_path_length,
2375 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2377 struct MeshPathInfo *path_info = cls;
2378 struct MeshPeerPath *p;
2379 struct GNUNET_PeerIdentity pi;
2382 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2383 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2384 "MESH: Got results from DHT for %s\n",
2385 GNUNET_h2s_full(&pi.hashPubKey));
2386 GNUNET_DHT_get_stop(path_info->peer->dhtget);
2387 path_info->peer->dhtget = NULL;
2389 p = path_build_from_dht (get_path, get_path_length,
2390 put_path, put_path_length);
2391 path_add_to_peer (path_info->peer, p);
2392 for (i = 0; i < path_info->peer->ntunnels; i++)
2394 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2395 peer_info_connect(path_info->peer, path_info->t);
2397 GNUNET_free (path_info);
2404 * Function to process paths received for a new peer addition. The recorded
2405 * paths form the initial tunnel, which can be optimized later.
2406 * Called on each result obtained for the DHT search.
2408 * @param cls closure
2409 * @param exp when will this value expire
2410 * @param key key of the result
2411 * @param type type of the result
2412 * @param size number of bytes in data
2413 * @param data pointer to the result data
2416 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2417 const GNUNET_HashCode * key,
2418 const struct GNUNET_PeerIdentity *get_path,
2419 unsigned int get_path_length,
2420 const struct GNUNET_PeerIdentity *put_path,
2421 unsigned int put_path_length,
2422 enum GNUNET_BLOCK_Type type, size_t size,
2425 const struct GNUNET_PeerIdentity *pi = data;
2426 struct GNUNET_PeerIdentity id;
2427 struct MeshTunnel *t = cls;
2428 struct MeshPeerInfo *peer_info;
2429 struct MeshPathInfo *path_info;
2430 struct MeshPeerPath *p;
2433 if (size != sizeof (struct GNUNET_PeerIdentity))
2435 GNUNET_break_op (0);
2438 GNUNET_assert (NULL != t->client);
2439 GNUNET_DHT_get_stop (t->dht_get_type);
2440 t->dht_get_type = NULL;
2441 peer_info = peer_info_get (pi);
2442 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2443 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2445 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2446 NULL == peer_info->dhtget)
2448 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2449 path_info->peer = peer_info;
2451 /* we don't have a route to the peer, let's try a direct lookup */
2453 GNUNET_DHT_get_start (dht_handle, /* handle */
2454 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2455 GNUNET_BLOCK_TYPE_TEST, /* block type */
2456 &pi->hashPubKey, /* key to look up */
2457 10U, /* replication level */
2458 GNUNET_DHT_RO_RECORD_ROUTE |
2459 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2460 /* option to dht: record route */
2462 0, /* xquery bits */
2463 dht_get_id_handler, /* callback */
2464 path_info); /* closure */
2468 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2469 path_add_to_peer (peer_info, p);
2470 tunnel_add_peer(t, peer_info);
2471 p = tree_get_path_to_peer(t->tree, peer_info->id);
2473 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2474 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2475 t->local_tid, p->length);
2476 for (i = 0; i < p->length; i++)
2478 GNUNET_PEER_resolve (p->peers[0], &id);
2479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2480 GNUNET_h2s_full (&id.hashPubKey));
2486 send_create_path(peer_info, p, t);
2490 send_client_peer_connected(t, myid);
2494 /******************************************************************************/
2495 /********************* MESH LOCAL HANDLES **************************/
2496 /******************************************************************************/
2500 * Handler for client disconnection
2502 * @param cls closure
2503 * @param client identification of the client; NULL
2504 * for the last call when the server is destroyed
2507 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2509 struct MeshClient *c;
2510 struct MeshClient *next;
2512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2518 if (c->handle != client && NULL != client)
2520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2525 if (NULL != c->tunnels)
2527 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2528 &tunnel_destroy_iterator,
2530 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2533 /* deregister clients applications */
2534 if (NULL != c->apps)
2536 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2537 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2539 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2540 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2542 GNUNET_SCHEDULER_cancel (announce_applications_task);
2543 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2545 if (NULL != c->types)
2546 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2547 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2559 * Handler for new clients
2561 * @param cls closure
2562 * @param client identification of the client
2563 * @param message the actual message, which includes messages the client wants
2566 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2567 const struct GNUNET_MessageHeader *message)
2569 struct GNUNET_MESH_ClientConnect *cc_msg;
2570 struct MeshClient *c;
2571 GNUNET_MESH_ApplicationType *a;
2578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2579 /* Check data sanity */
2580 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2581 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2582 ntypes = ntohs (cc_msg->types);
2583 napps = ntohs (cc_msg->applications);
2585 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2588 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2592 /* Create new client structure */
2593 c = GNUNET_malloc (sizeof (struct MeshClient));
2595 c->id = next_client_id++;
2598 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2601 GNUNET_MESH_ApplicationType at;
2604 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2605 for (i = 0; i < napps; i++)
2608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2609 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2610 /* store in clients hashmap */
2611 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2612 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2613 /* store in global hashmap, for announcements */
2614 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2615 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2617 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2618 announce_applications_task =
2619 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2627 t = (uint16_t *) & a[napps];
2628 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2629 for (i = 0; i < ntypes; i++)
2632 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2634 /* store in clients hashmap */
2635 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2636 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2637 /* store in global hashmap */
2638 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2639 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2642 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2643 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2645 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2646 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2647 GNUNET_SERVER_notification_context_add (nc, client);
2649 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2657 * Handler for requests of new tunnels
2659 * @param cls closure
2660 * @param client identification of the client
2661 * @param message the actual message
2664 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2665 const struct GNUNET_MessageHeader *message)
2667 struct GNUNET_MESH_TunnelMessage *t_msg;
2668 struct MeshTunnel *t;
2669 struct MeshClient *c;
2670 GNUNET_HashCode hash;
2672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2674 /* Sanity check for client registration */
2675 if (NULL == (c = client_get (client)))
2678 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2685 /* Message sanity check */
2686 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2689 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2693 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2694 /* Sanity check for tunnel numbering */
2695 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2698 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2701 /* Sanity check for duplicate tunnel IDs */
2702 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2705 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2709 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2711 while (NULL != tunnel_get_by_pi (myid, next_tid))
2712 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2713 t->id.tid = next_tid++;
2715 t->local_tid = ntohl (t_msg->tunnel_id);
2717 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2719 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2721 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2722 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2725 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2729 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2731 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2732 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2735 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2738 t->tree = tree_new (t, myid);
2739 t->tree->refresh = REFRESH_PATH_TIME;
2740 t->tree->root->status = MESH_PEER_READY;
2741 t->tree->me = t->tree->root;
2743 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2749 * Handler for requests of deleting tunnels
2751 * @param cls closure
2752 * @param client identification of the client
2753 * @param message the actual message
2756 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2757 const struct GNUNET_MessageHeader *message)
2759 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2760 struct MeshClient *c;
2761 struct MeshTunnel *t;
2762 MESH_TunnelNumber tid;
2763 GNUNET_HashCode hash;
2765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2767 /* Sanity check for client registration */
2768 if (NULL == (c = client_get (client)))
2771 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2774 /* Message sanity check */
2775 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2778 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2784 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2786 /* Retrieve tunnel */
2787 tid = ntohl (tunnel_msg->tunnel_id);
2789 /* Remove from local id hashmap */
2790 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2791 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2792 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2794 /* Remove from global id hashmap */
2795 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2796 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2798 // notify_tunnel_destroy(t); FIXME
2800 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2806 * Handler for connection requests to new peers
2808 * @param cls closure
2809 * @param client identification of the client
2810 * @param message the actual message (PeerControl)
2813 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2814 const struct GNUNET_MessageHeader *message)
2816 struct GNUNET_MESH_PeerControl *peer_msg;
2817 struct MeshPeerInfo *peer_info;
2818 struct MeshClient *c;
2819 struct MeshTunnel *t;
2820 MESH_TunnelNumber tid;
2822 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
2823 /* Sanity check for client registration */
2824 if (NULL == (c = client_get (client)))
2827 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2831 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2832 /* Sanity check for message size */
2833 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2836 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2840 /* Tunnel exists? */
2841 tid = ntohl (peer_msg->tunnel_id);
2842 t = tunnel_get_by_local_id (c, tid);
2846 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2850 /* Does client own tunnel? */
2851 if (t->client->handle != client)
2854 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2857 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
2858 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
2859 peer_info = peer_info_get (&peer_msg->peer);
2861 tunnel_add_peer(t, peer_info);
2862 peer_info_connect(peer_info, t);
2864 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2870 * Handler for disconnection requests of peers in a tunnel
2872 * @param cls closure
2873 * @param client identification of the client
2874 * @param message the actual message (PeerControl)
2877 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2878 const struct GNUNET_MessageHeader *message)
2880 struct GNUNET_MESH_PeerControl *peer_msg;
2881 struct MeshClient *c;
2882 struct MeshTunnel *t;
2883 MESH_TunnelNumber tid;
2885 /* Sanity check for client registration */
2886 if (NULL == (c = client_get (client)))
2889 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2892 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2893 /* Sanity check for message size */
2894 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2897 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2901 /* Tunnel exists? */
2902 tid = ntohl (peer_msg->tunnel_id);
2903 t = tunnel_get_by_local_id (c, tid);
2907 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2911 /* Does client own tunnel? */
2912 if (t->client->handle != client)
2915 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2919 /* Ok, delete peer from tunnel */
2920 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2921 &peer_msg->peer.hashPubKey);
2923 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2929 * Handler for connection requests to new peers by type
2931 * @param cls closure
2932 * @param client identification of the client
2933 * @param message the actual message (ConnectPeerByType)
2936 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2937 const struct GNUNET_MessageHeader *message)
2939 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2940 struct MeshClient *c;
2941 struct MeshTunnel *t;
2942 GNUNET_HashCode hash;
2943 MESH_TunnelNumber tid;
2945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
2946 /* Sanity check for client registration */
2947 if (NULL == (c = client_get (client)))
2950 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2954 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2955 /* Sanity check for message size */
2956 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
2957 ntohs (connect_msg->header.size))
2960 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2964 /* Tunnel exists? */
2965 tid = ntohl (connect_msg->tunnel_id);
2966 t = tunnel_get_by_local_id (c, tid);
2970 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2974 /* Does client own tunnel? */
2975 if (t->client->handle != client)
2978 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2982 /* Do WE have the service? */
2983 t->type = ntohl (connect_msg->type);
2984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
2985 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
2986 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
2989 /* Yes! Fast forward, add ourselves to the tunnel and send the
2990 * good news to the client
2992 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
2993 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
2994 peer_info_get (&my_full_id),
2995 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
2998 send_client_peer_connected(t, myid);
2999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3000 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3003 /* Ok, lets find a peer offering the service */
3004 if (NULL != t->dht_get_type)
3006 GNUNET_DHT_get_stop (t->dht_get_type);
3008 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3009 GNUNET_h2s_full (&hash));
3011 GNUNET_DHT_get_start (dht_handle,
3012 GNUNET_TIME_UNIT_FOREVER_REL,
3013 GNUNET_BLOCK_TYPE_TEST,
3016 GNUNET_DHT_RO_RECORD_ROUTE |
3017 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3019 &dht_get_type_handler, t);
3021 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3027 * Handler for client traffic directed to one peer
3029 * @param cls closure
3030 * @param client identification of the client
3031 * @param message the actual message
3034 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3035 const struct GNUNET_MessageHeader *message)
3037 struct MeshClient *c;
3038 struct MeshTunnel *t;
3039 struct MeshPeerInfo *pi;
3040 struct GNUNET_MESH_Unicast *data_msg;
3041 MESH_TunnelNumber tid;
3044 /* Sanity check for client registration */
3045 if (NULL == (c = client_get (client)))
3048 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3051 data_msg = (struct GNUNET_MESH_Unicast *) message;
3052 /* Sanity check for message size */
3053 size = ntohs (message->size);
3054 if (sizeof (struct GNUNET_MESH_Unicast) +
3055 sizeof (struct GNUNET_MessageHeader) > size)
3058 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3062 /* Tunnel exists? */
3063 tid = ntohl (data_msg->tid);
3064 t = tunnel_get_by_local_id (c, tid);
3068 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3072 /* Is it a local tunnel? Then, does client own the tunnel? */
3073 if (t->client->handle != NULL && t->client->handle != client)
3076 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3080 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3081 &data_msg->destination.hashPubKey);
3082 /* Is the selected peer in the tunnel? */
3086 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3090 /* Ok, everything is correct, send the message
3091 * (pretend we got it from a mesh peer)
3094 char buf[ntohs (message->size)];
3095 struct GNUNET_MESH_Unicast *copy;
3097 /* Work around const limitation */
3098 copy = (struct GNUNET_MESH_Unicast *) buf;
3099 memcpy (buf, data_msg, size);
3100 copy->oid = my_full_id;
3101 copy->tid = htonl (t->id.tid);
3102 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL);
3104 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3109 * Handler for client traffic directed to all peers in a tunnel
3111 * @param cls closure
3112 * @param client identification of the client
3113 * @param message the actual message
3116 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3117 const struct GNUNET_MessageHeader *message)
3119 struct MeshClient *c;
3120 struct MeshTunnel *t;
3121 struct GNUNET_MESH_Multicast *data_msg;
3122 MESH_TunnelNumber tid;
3124 /* Sanity check for client registration */
3125 if (NULL == (c = client_get (client)))
3128 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3131 data_msg = (struct GNUNET_MESH_Multicast *) message;
3132 /* Sanity check for message size */
3133 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3136 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3140 /* Tunnel exists? */
3141 tid = ntohl (data_msg->tid);
3142 t = tunnel_get_by_local_id (c, tid);
3146 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3150 /* Does client own tunnel? */
3151 if (t->client->handle != client)
3154 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3159 char buf[ntohs(message->size)];
3160 struct GNUNET_MESH_Multicast *copy;
3162 copy = (struct GNUNET_MESH_Multicast *)buf;
3163 memcpy(buf, message, ntohs(message->size));
3164 copy->oid = my_full_id;
3165 copy->tid = htonl(t->id.tid);
3166 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL);
3169 /* receive done gets called when last copy is sent */
3174 * Functions to handle messages from clients
3176 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3177 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3178 {&handle_local_tunnel_create, NULL,
3179 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3180 sizeof (struct GNUNET_MESH_TunnelMessage)},
3181 {&handle_local_tunnel_destroy, NULL,
3182 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3183 sizeof (struct GNUNET_MESH_TunnelMessage)},
3184 {&handle_local_connect_add, NULL,
3185 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3186 sizeof (struct GNUNET_MESH_PeerControl)},
3187 {&handle_local_connect_del, NULL,
3188 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3189 sizeof (struct GNUNET_MESH_PeerControl)},
3190 {&handle_local_connect_by_type, NULL,
3191 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3192 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3193 {&handle_local_unicast, NULL,
3194 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3195 {&handle_local_unicast, NULL,
3196 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3197 {&handle_local_multicast, NULL,
3198 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3204 * To be called on core init/fail.
3206 * @param cls service closure
3207 * @param server handle to the server for this service
3208 * @param identity the public identity of this peer
3211 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3212 const struct GNUNET_PeerIdentity *identity)
3214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3215 core_handle = server;
3216 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3218 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3219 GNUNET_SCHEDULER_shutdown();
3225 * Method called whenever a given peer connects.
3227 * @param cls closure
3228 * @param peer peer identity this notification is about
3229 * @param atsi performance data for the connection
3232 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3233 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3235 struct MeshPeerInfo *peer_info;
3236 struct MeshPeerPath *path;
3238 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3239 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3240 // GNUNET_h2s(&my_full_id.hashPubKey));
3241 peer_info = peer_info_get (peer);
3242 if (myid == peer_info->id)
3244 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3249 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3250 // GNUNET_h2s(&peer->hashPubKey));
3252 path = path_new (2);
3253 path->peers[0] = myid;
3254 path->peers[1] = peer_info->id;
3255 GNUNET_PEER_change_rc(myid, 1);
3256 GNUNET_PEER_change_rc(peer_info->id, 1);
3257 path_add_to_peer (peer_info, path);
3262 * Method called whenever a peer disconnects.
3264 * @param cls closure
3265 * @param peer peer identity this notification is about
3268 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3270 struct MeshPeerInfo *pi;
3273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3274 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3280 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3282 peer_info_cancel_transmission(pi, i);
3284 path_remove_from_peer (pi, pi->id, myid);
3287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3293 /******************************************************************************/
3294 /************************ MAIN FUNCTIONS ****************************/
3295 /******************************************************************************/
3298 * Iterator over hash map entries.
3300 * @param cls closure
3301 * @param key current key code
3302 * @param value value in the hash map
3303 * @return GNUNET_YES if we should continue to
3308 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
3310 struct MeshTunnel *t = value;
3316 * Task run during shutdown.
3322 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3325 /* TODO: destroy tunnels? */
3326 if (core_handle != NULL)
3328 GNUNET_CORE_disconnect (core_handle);
3331 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
3332 if (dht_handle != NULL)
3334 GNUNET_DHT_disconnect (dht_handle);
3339 GNUNET_SERVER_notification_context_destroy (nc);
3342 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3344 GNUNET_SCHEDULER_cancel (announce_id_task);
3345 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3351 * Process mesh requests.
3353 * @param cls closure
3354 * @param server the initialized server
3355 * @param c configuration to use
3358 run (void *cls, struct GNUNET_SERVER_Handle *server,
3359 const struct GNUNET_CONFIGURATION_Handle *c)
3361 struct MeshPeerInfo *peer;
3362 struct MeshPeerPath *p;
3365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3366 server_handle = server;
3367 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3368 CORE_QUEUE_SIZE, /* queue size */
3369 NULL, /* Closure passed to MESH functions */
3370 &core_init, /* Call core_init once connected */
3371 &core_connect, /* Handle connects */
3372 &core_disconnect, /* remove peers on disconnects */
3373 NULL, /* Do we care about "status" updates? */
3374 NULL, /* Don't notify about all incoming messages */
3375 GNUNET_NO, /* For header only in notification */
3376 NULL, /* Don't notify about all outbound messages */
3377 GNUNET_NO, /* For header-only out notification */
3378 core_handlers); /* Register these handlers */
3379 if (core_handle == NULL)
3382 GNUNET_SCHEDULER_shutdown ();
3387 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3390 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3392 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3393 GNUNET_SCHEDULER_shutdown ();
3396 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3397 GNUNET_free (keyfile);
3398 if (my_private_key == NULL)
3400 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3401 _("Mesh service could not access hostkey. Exiting.\n"));
3402 GNUNET_SCHEDULER_shutdown ();
3405 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3406 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3407 &my_full_id.hashPubKey);
3408 myid = GNUNET_PEER_intern (&my_full_id);
3410 dht_handle = GNUNET_DHT_connect (c, 64);
3411 if (dht_handle == NULL)
3417 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3419 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3420 peers = GNUNET_CONTAINER_multihashmap_create (32);
3421 applications = GNUNET_CONTAINER_multihashmap_create (32);
3422 types = GNUNET_CONTAINER_multihashmap_create (32);
3424 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3425 nc = GNUNET_SERVER_notification_context_create (server_handle,
3427 GNUNET_SERVER_disconnect_notify (server_handle,
3428 &handle_local_client_disconnect,
3433 clients_tail = NULL;
3438 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3439 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3441 /* Create a peer_info for the local peer */
3442 peer = peer_info_get(&my_full_id);
3445 path_add_to_peer(peer, p);
3447 /* Scheduled the task to clean up when shutdown is called */
3448 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3455 * The main function for the mesh service.
3457 * @param argc number of arguments from the command line
3458 * @param argv command line arguments
3459 * @return 0 ok, 1 on error
3462 main (int argc, char *const *argv)
3467 // fprintf (stderr, "main ()\n");
3469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3472 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3476 // fprintf (stderr, "main () END\n");