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
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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;
861 p = tree_get_path_to_peer(t->tree, peer->id);
862 for (i = 0; i < p->length; i++)
864 if (p->peers[i] == myid)
867 if (i >= p->length - 1)
872 GNUNET_PEER_resolve(p->peers[i + 1], &id);
874 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
876 path_info->peer = peer;
878 neighbor = peer_info_get(&id);
879 path_info->pos = peer_info_transmit_position(neighbor);
880 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
881 neighbor->infos[path_info->pos] = path_info;
882 neighbor->core_transmit[path_info->pos] =
883 GNUNET_CORE_notify_transmit_ready (
884 core_handle, /* handle */
887 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
889 sizeof (struct GNUNET_MESH_ManipulatePath)
890 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
891 &send_core_create_path, /* callback */
892 path_info); /* cls */
898 * Try to establish a new connection to this peer.
899 * Use the best path for the given tunnel.
900 * If the peer doesn't have any path to it yet, try to get one.
901 * If the peer already has some path, send a CREATE PATH towards it.
903 * @param peer PeerInfo of the peer.
904 * @param t Tunnel for which to create the path, if possible.
907 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
909 struct MeshPeerPath *p;
910 struct MeshPathInfo *path_info;
912 if (NULL != peer->path_head)
914 p = tree_get_path_to_peer(t->tree, peer->id);
917 send_create_path(peer, p, t);
921 send_client_peer_connected(t, myid);
924 else if (NULL == peer->dhtget)
926 struct GNUNET_PeerIdentity id;
928 GNUNET_PEER_resolve(peer->id, &id);
929 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
930 path_info->peer = peer;
933 GNUNET_DHT_get_start(dht_handle, /* handle */
934 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
935 GNUNET_BLOCK_TYPE_TEST, /* type */
936 &id.hashPubKey, /* key to search */
937 4, /* replication level */
938 GNUNET_DHT_RO_RECORD_ROUTE |
939 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
945 /* Otherwise, there is no path but the DHT get is already started. */
951 * Destroy the peer_info and free any allocated resources linked to it
952 * @param t tunnel the path belongs to
953 * @param pi the peer_info to destroy
954 * @return GNUNET_OK on success
957 peer_info_destroy (struct MeshPeerInfo *pi)
959 GNUNET_HashCode hash;
960 struct GNUNET_PeerIdentity id;
962 GNUNET_PEER_resolve (pi->id, &id);
963 GNUNET_PEER_change_rc (pi->id, -1);
964 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
966 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
967 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
975 * Notify a tunnel that a connection has broken that affects at least
978 * @param t Tunnel affected.
979 * @param peer Peer that (at least) has been affected by the disconnection.
980 * @param p1 Peer that got disconnected from p2.
981 * @param p2 Peer that got disconnected from p1.
983 * @return Short ID of the peer disconnected (either p1 or p2).
984 * 0 if the tunnel remained unaffected.
986 static GNUNET_PEER_Id
987 tunnel_notify_connection_broken (struct MeshTunnel *t,
988 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
992 * Remove all paths that rely on a direct connection between p1 and p2
993 * from the peer itself and notify all tunnels about it.
995 * @param peer PeerInfo of affected peer.
996 * @param p1 GNUNET_PEER_Id of one peer.
997 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1000 * TODO: optimize (see below)
1003 path_remove_from_peer (struct MeshPeerInfo *peer,
1007 struct GNUNET_PeerIdentity id;
1008 struct MeshPeerPath *p;
1009 struct MeshPeerPath *aux;
1010 struct MeshPeerInfo *peer_d;
1012 unsigned int destroyed;
1018 p = peer->path_head;
1022 for (i = 0; i < (p->length - 1); i++)
1024 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1025 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1037 for (i = 0; i < peer->ntunnels; i++)
1039 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
1041 * Problem: one or more peers have been deleted from the tunnel tree.
1042 * We don't know who they are to try to add them again.
1043 * We need to try to find a new path for each of the disconnected peers.
1044 * Some of them might already have a path to reach them that does not
1045 * involve p1 and p2. Adding all anew might render in a better tree than
1046 * the trivial immediate fix.
1048 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1049 * its children will be reachable trough him.
1051 peer_d = peer_info_get_short(d);
1054 for (p = peer_d->path_head; NULL != p; p = p->next)
1056 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1064 /* No callback, as peer will be already disconnected */
1065 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1069 struct MeshPathInfo *path_info;
1071 if (NULL != peer_d->dhtget)
1073 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1074 path_info->path = p;
1075 path_info->peer = peer_d;
1076 path_info->t = peer->tunnels[i];
1078 GNUNET_DHT_get_start(dht_handle, /* handle */
1079 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1080 GNUNET_BLOCK_TYPE_TEST, /* type */
1081 &id.hashPubKey, /*key to search */
1082 4, /* replication level */
1083 GNUNET_DHT_RO_RECORD_ROUTE |
1084 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1086 0, /* xquery bits */
1087 &dht_get_id_handler,
1088 (void *) path_info);
1095 * Add the path to the peer and update the path used to reach it in case this
1098 * @param peer_info Destination peer to add the path to.
1099 * @param path New path to add. Last peer must be the peer in arg 1.
1100 * Path will be either used of freed if already known.
1102 * TODO: trim the part from origin to us? Add it as path to origin?
1105 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1107 struct MeshPeerPath *aux;
1111 if (NULL == peer_info || NULL == path)
1117 l = path_get_length (path);
1124 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1126 l2 = path_get_length (aux);
1129 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1130 peer_info->path_tail, aux, path);
1134 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1141 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1148 * Add the path to the origin peer and update the path used to reach it in case
1149 * this is the shortest.
1150 * The path is given in peer_info -> destination, therefore we turn the path
1151 * upside down first.
1153 * @param peer_info Peer to add the path to, being the origin of the path.
1154 * @param path New path to add after being inversed.
1157 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1160 path_add_to_peer (peer_info, path);
1165 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1166 * to obtain a local peer -> destination path and interning the peer ids.
1168 * @return Newly allocated and created path
1170 static struct MeshPeerPath *
1171 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1172 unsigned int get_path_length,
1173 const struct GNUNET_PeerIdentity *put_path,
1174 unsigned int put_path_length)
1176 struct MeshPeerPath *p;
1182 GNUNET_PEER_change_rc(myid, 1);
1183 i = get_path_length;
1184 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1185 for (i--; i >= 0; i--)
1187 id = GNUNET_PEER_intern (&get_path[i]);
1188 if (p->length > 0 && id == p->peers[p->length - 1])
1190 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1191 GNUNET_PEER_change_rc(id, -1);
1195 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1196 "MESH: Adding from GET: %s.\n",
1197 GNUNET_i2s(&get_path[i]));
1199 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1200 p->peers[p->length - 1] = id;
1203 i = put_path_length;
1204 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1205 for (i--; i >= 0; i--)
1207 id = GNUNET_PEER_intern (&put_path[i]);
1210 /* PUT path went through us, so discard the path up until now and start
1211 * from here to get a much shorter (and loop-free) path.
1216 if (p->length > 0 && id == p->peers[p->length - 1])
1218 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1219 GNUNET_PEER_change_rc(id, -1);
1223 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1224 "MESH: Adding from PUT: %s.\n",
1225 GNUNET_i2s(&put_path[i]));
1227 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1228 p->peers[p->length - 1] = id;
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1233 "MESH: (first of GET: %s)\n",
1234 GNUNET_h2s_full(&get_path[0].hashPubKey));
1235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1236 "MESH: (first of PUT: %s)\n",
1237 GNUNET_h2s_full(&put_path[0].hashPubKey));
1238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1239 "MESH: In total: %d hops\n",
1241 for (i = 0; i < p->length; i++)
1243 struct GNUNET_PeerIdentity peer_id;
1245 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1249 GNUNET_h2s_full(&peer_id.hashPubKey));
1257 * Send keepalive packets for a peer
1259 * @param cls Closure (tunnel for which to send the keepalive).
1260 * @param tc Notification context.
1262 * TODO: implement explicit multicast keepalive?
1265 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1269 * Search for a tunnel among the tunnels for a client
1271 * @param c the client whose tunnels to search in
1272 * @param tid the local id of the tunnel
1274 * @return tunnel handler, NULL if doesn't exist
1276 static struct MeshTunnel *
1277 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1279 GNUNET_HashCode hash;
1281 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1282 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1287 * Search for a tunnel by global ID using PEER_ID
1289 * @param pi owner of the tunnel
1290 * @param tid global tunnel number
1292 * @return tunnel handler, NULL if doesn't exist
1294 static struct MeshTunnel *
1295 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1297 struct MESH_TunnelID id;
1298 GNUNET_HashCode hash;
1303 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1304 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1309 * Search for a tunnel by global ID using full PeerIdentities
1311 * @param oid owner of the tunnel
1312 * @param tid global tunnel number
1314 * @return tunnel handler, NULL if doesn't exist
1316 static struct MeshTunnel *
1317 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1319 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1324 * Callback used to notify a client owner of a tunnel that a peer has
1325 * disconnected, most likely because of a path change.
1327 * @param n Node in the tree representing the disconnected peer
1330 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1332 struct MeshPeerInfo *peer;
1334 if (NULL != n->t->client && NULL != nc)
1336 struct GNUNET_MESH_PeerControl msg;
1337 msg.header.size = htons (sizeof (msg));
1338 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1339 msg.tunnel_id = htonl (n->t->local_tid);
1340 GNUNET_PEER_resolve (n->peer, &msg.peer);
1341 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1342 &msg.header, GNUNET_NO);
1344 peer = peer_info_get_short(n->peer);
1345 peer_info_connect(peer, n->t);
1350 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1351 * needed rescources.
1352 * If peer already exists, reevaluate shortest path and change if different.
1354 * @param t Tunnel we want to add a new peer to
1355 * @param peer PeerInfo of the peer being added
1359 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1361 struct GNUNET_PeerIdentity id;
1362 struct MeshPeerPath *best_p;
1363 struct MeshPeerPath *p;
1364 unsigned int best_cost;
1367 GNUNET_PEER_resolve(peer->id, &id);
1369 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1372 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1373 GNUNET_CONTAINER_multihashmap_put(
1377 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1380 if (NULL != (p = peer->path_head))
1383 best_cost = path_get_cost(t->tree, p);
1386 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1393 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1394 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1395 t->path_refresh_task =
1396 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1400 /* Start a DHT get if necessary */
1401 peer_info_connect(peer, t);
1407 * Notify a tunnel that a connection has broken that affects at least
1408 * some of its peers.
1410 * @param t Tunnel affected.
1411 * @param peer Peer that (at least) has been affected by the disconnection.
1412 * @param p1 Peer that got disconnected from p2.
1413 * @param p2 Peer that got disconnected from p1.
1415 * @return Short ID of the peer disconnected (either p1 or p2).
1416 * 0 if the tunnel remained unaffected.
1418 static GNUNET_PEER_Id
1419 tunnel_notify_connection_broken (struct MeshTunnel *t,
1420 struct MeshPeerInfo *peer,
1424 return tree_notify_connection_broken (t->tree, p1, p2,
1425 ¬ify_peer_disconnected);
1430 * Destroy the tunnel and free any allocated resources linked to it
1432 * @param t the tunnel to destroy
1434 * @return GNUNET_OK on success
1437 tunnel_destroy (struct MeshTunnel *t)
1439 struct MeshClient *c;
1440 struct MeshQueue *q;
1441 struct MeshQueue *qn;
1442 GNUNET_HashCode hash;
1445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1454 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1455 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1460 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1461 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1465 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1469 if (NULL != q->data)
1470 GNUNET_free (q->data);
1474 /* TODO cancel core transmit ready in case it was active */
1476 tree_destroy(t->tree);
1477 if (NULL != t->dht_get_type)
1478 GNUNET_DHT_get_stop(t->dht_get_type);
1479 t->dht_get_type = NULL;
1486 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1487 * client when the client disconnects.
1489 * @param cls closure (client that is disconnecting)
1490 * @param key the hash of the local tunnel id (used to access the hashmap)
1491 * @param value the value stored at the key (tunnel to destroy)
1493 * @return GNUNET_OK on success
1496 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1498 struct MeshTunnel *t = value;
1501 if (NULL != t->dht_get_type)
1503 GNUNET_DHT_get_stop (t->dht_get_type);
1505 r = tunnel_destroy (t);
1510 /******************************************************************************/
1511 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1512 /******************************************************************************/
1515 * Function called to notify a client about the socket
1516 * being ready to queue more data. "buf" will be
1517 * NULL and "size" zero if the socket was closed for
1518 * writing in the meantime.
1520 * @param cls closure
1521 * @param size number of bytes available in buf
1522 * @param buf where the callee should write the message
1523 * @return number of bytes written to buf
1526 send_core_create_path (void *cls, size_t size, void *buf)
1528 struct MeshPathInfo *info = cls;
1529 struct GNUNET_MESH_ManipulatePath *msg;
1530 struct GNUNET_PeerIdentity *peer_ptr;
1531 struct MeshPeerInfo *peer = info->peer;
1532 struct MeshTunnel *t = info->t;
1533 struct MeshPeerPath *p = info->path;
1538 sizeof (struct GNUNET_MESH_ManipulatePath) +
1539 p->length * sizeof (struct GNUNET_PeerIdentity);
1541 if (size < size_needed || NULL == buf)
1543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
1544 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
1545 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
1547 info->peer->core_transmit[info->pos] =
1548 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1549 GNUNET_TIME_UNIT_FOREVER_REL,
1550 path_get_first_hop (t->tree, peer->id),
1552 &send_core_create_path,
1557 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1558 msg->header.size = htons (size_needed);
1559 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1560 msg->tid = ntohl (t->id.tid);
1562 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1563 for (i = 0; i < p->length; i++)
1565 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1572 "MESH: CREATE PATH (%u bytes long) sent!\n",
1580 * Function called to notify a client about the socket
1581 * being ready to queue more data. "buf" will be
1582 * NULL and "size" zero if the socket was closed for
1583 * writing in the meantime.
1585 * @param cls closure (MeshDataDescriptor with all info to build packet)
1586 * @param size number of bytes available in buf
1587 * @param buf where the callee should write the message
1588 * @return number of bytes written to buf
1591 send_core_data_to_origin (void *cls, size_t size, void *buf)
1593 struct MeshDataDescriptor *info = cls;
1594 struct GNUNET_MESH_ToOrigin *msg = buf;
1597 GNUNET_assert (NULL != info);
1598 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1599 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1601 if (total_size > size)
1603 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1604 "not enough buffer to send data to origin\n");
1607 msg->header.size = htons (total_size);
1608 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1609 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1610 msg->tid = htonl (info->origin->tid);
1611 if (0 != info->size)
1613 memcpy (&msg[1], &info[1], info->size);
1615 if (NULL != info->client)
1617 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1626 * Function called to notify a client about the socket
1627 * being ready to queue more data. "buf" will be
1628 * NULL and "size" zero if the socket was closed for
1629 * writing in the meantime.
1631 * @param cls closure (data itself)
1632 * @param size number of bytes available in buf
1633 * @param buf where the callee should write the message
1635 * @return number of bytes written to buf
1638 send_core_data_multicast (void *cls, size_t size, void *buf)
1640 struct MeshDataDescriptor *info = cls;
1641 struct GNUNET_MESH_Multicast *msg = buf;
1644 GNUNET_assert (NULL != info);
1645 GNUNET_assert (NULL != info->peer);
1646 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1647 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1649 if (total_size > size)
1652 struct GNUNET_PeerIdentity id;
1654 GNUNET_PEER_resolve(info->peer->id, &id);
1655 info->peer->infos[info->handler_n] = info;
1656 info->peer->types[info->handler_n] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1657 info->peer->core_transmit[info->handler_n] =
1658 GNUNET_CORE_notify_transmit_ready (core_handle,
1661 GNUNET_TIME_UNIT_FOREVER_REL,
1664 &send_core_data_multicast,
1668 info->peer->core_transmit[info->handler_n] = NULL;
1669 info->peer->infos[info->handler_n] = NULL;
1670 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1671 msg->header.size = htons (total_size);
1672 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1673 msg->tid = htonl (info->origin->tid);
1674 memcpy (&msg[1], info->data, info->size);
1675 if (0 == --(*info->copies))
1677 if (NULL != info->client)
1679 /* FIXME One unresponsive neighbor (who doesn't "call" tmt_rdy) can lock
1680 * the client from sending anything else to the service.
1681 * - Call receive_done after certain timeout.
1682 * - Here cancel the timeout.
1684 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1686 GNUNET_free (info->data);
1687 GNUNET_free (info->copies);
1695 * Function called to notify a client about the socket
1696 * being ready to queue more data. "buf" will be
1697 * NULL and "size" zero if the socket was closed for
1698 * writing in the meantime.
1700 * @param cls closure (MeshDataDescriptor)
1701 * @param size number of bytes available in buf
1702 * @param buf where the callee should write the message
1703 * @return number of bytes written to buf
1706 send_core_path_ack (void *cls, size_t size, void *buf)
1708 struct MeshDataDescriptor *info = cls;
1709 struct GNUNET_MESH_PathACK *msg = buf;
1711 GNUNET_assert (NULL != info);
1714 info->peer->core_transmit[info->handler_n] = NULL;
1716 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1721 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1722 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1723 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1724 msg->tid = htonl (info->origin->tid);
1725 msg->peer_id = my_full_id;
1727 /* TODO add signature */
1729 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
1730 return sizeof (struct GNUNET_MESH_PathACK);
1735 * Function called to notify a client about the socket
1736 * being ready to queue more data. "buf" will be
1737 * NULL and "size" zero if the socket was closed for
1738 * writing in the meantime.
1740 * @param cls closure (data itself)
1741 * @param size number of bytes available in buf
1742 * @param buf where the callee should write the message
1743 * @return number of bytes written to buf
1746 send_core_data_raw (void *cls, size_t size, void *buf)
1748 struct GNUNET_MessageHeader *msg = cls;
1751 GNUNET_assert (NULL != msg);
1752 total_size = ntohs (msg->size);
1754 if (total_size > size)
1759 memcpy (buf, msg, total_size);
1767 * Send another peer a notification to destroy a tunnel
1768 * @param cls The tunnel to destroy
1769 * @param size Size in the buffer
1770 * @param buf Memory where to put the data to transmit
1771 * @return Size of data put in buffer
1774 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1776 struct MeshTunnel *t = cls;
1777 struct MeshClient *c;
1778 struct GNUNET_MESH_TunnelMessage *msg;
1782 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1783 /*FIXME*/ msg->header.size =
1784 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1785 msg->tunnel_id = htonl (t->id.tid);
1787 tunnel_destroy (c, t);
1788 return sizeof (struct GNUNET_MESH_TunnelMessage);
1793 /******************************************************************************/
1794 /******************** MESH NETWORK HANDLERS **************************/
1795 /******************************************************************************/
1799 * Core handler for path creation
1800 * struct GNUNET_CORE_MessageHandler
1802 * @param cls closure
1803 * @param message message
1804 * @param peer peer identity this notification is about
1805 * @param atsi performance data
1806 * @return GNUNET_OK to keep the connection open,
1807 * GNUNET_SYSERR to close it (signal serious error)
1811 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1812 const struct GNUNET_MessageHeader *message,
1813 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1815 unsigned int own_pos;
1818 MESH_TunnelNumber tid;
1819 struct GNUNET_MESH_ManipulatePath *msg;
1820 struct GNUNET_PeerIdentity *pi;
1821 GNUNET_HashCode hash;
1822 struct MeshPeerPath *path;
1823 struct MeshPeerInfo *dest_peer_info;
1824 struct MeshPeerInfo *orig_peer_info;
1825 struct MeshTunnel *t;
1827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1828 "MESH: Received a path create msg [%s]\n",
1829 GNUNET_i2s(&my_full_id));
1830 size = ntohs (message->size);
1831 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1833 GNUNET_break_op (0);
1837 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1838 if (size % sizeof (struct GNUNET_PeerIdentity))
1840 GNUNET_break_op (0);
1843 size /= sizeof (struct GNUNET_PeerIdentity);
1846 GNUNET_break_op (0);
1849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1850 "MESH: path has %u hops.\n",
1852 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1854 tid = ntohl (msg->tid);
1855 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1856 t = tunnel_get (pi, tid);
1857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1858 "MESH: path is for tunnel %s [%X].\n",
1863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1864 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1865 t->id.oid = GNUNET_PEER_intern (pi);
1867 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1868 t->local_tid = next_local_tid++;
1869 /* FIXME test if taken */
1870 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
1871 t->tree = tree_new(t, t->id.oid);
1873 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1875 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1876 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1883 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1884 if (NULL == dest_peer_info)
1886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1887 "MESH: Creating PeerInfo for destination.\n");
1888 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1889 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1890 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1892 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1894 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1895 if (NULL == orig_peer_info)
1897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1898 "MESH: Creating PeerInfo for origin.\n");
1899 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1900 orig_peer_info->id = GNUNET_PEER_intern (pi);
1901 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1902 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
1905 path = path_new (size);
1907 for (i = 0; i < size; i++)
1909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1910 "MESH: ... adding %s\n",
1911 GNUNET_i2s(&pi[i]));
1912 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1913 if (path->peers[i] == myid)
1916 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1917 "MESH: Own position: %u\n", own_pos);
1920 /* cannot be self, must be 'not found' */
1921 /* create path: self not found in path through self */
1922 GNUNET_break_op (0);
1923 path_destroy (path);
1924 /* FIXME error. destroy tunnel? leave for timeout? */
1927 if (own_pos == size - 1)
1929 /* It is for us! Send ack. */
1930 struct GNUNET_MESH_TunnelNotification cmsg;
1931 struct MeshDataDescriptor *info;
1934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1935 "MESH: It's for us!\n");
1936 path_add_to_origin (orig_peer_info, path); /* inverts path! */
1937 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1938 info->origin = &t->id;
1939 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1940 GNUNET_assert (NULL != info->peer);
1941 for (j = 0; info->peer->core_transmit[j]; j++)
1943 if (j == (CORE_QUEUE_SIZE - 1))
1949 info->handler_n = j;
1950 info->peer->core_transmit[j] =
1951 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1952 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1953 sizeof (struct GNUNET_MESH_PathACK),
1954 &send_core_path_ack, info);
1955 cmsg.header.size = htons(sizeof(cmsg));
1956 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1957 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
1958 cmsg.tunnel_id = htonl(t->local_tid);
1959 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
1963 struct MeshPeerPath *path2;
1965 path2 = path_duplicate(path);
1966 /* It's for somebody else! Retransmit. */
1967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1968 "MESH: Retransmitting.\n");
1969 path_add_to_peer(dest_peer_info, path);
1970 tunnel_add_peer(t, dest_peer_info);
1971 path = path_duplicate(path2);
1972 path_add_to_origin(orig_peer_info, path2);
1973 send_create_path(dest_peer_info, path, t);
1980 * Core handler for mesh network traffic going from the origin to a peer
1982 * @param cls closure
1983 * @param peer peer identity this notification is about
1984 * @param message message
1985 * @param atsi performance data
1986 * @return GNUNET_OK to keep the connection open,
1987 * GNUNET_SYSERR to close it (signal serious error)
1990 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1991 const struct GNUNET_MessageHeader *message,
1992 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1994 struct GNUNET_MESH_Unicast *msg;
1995 struct MeshTunnel *t;
1996 struct MeshPeerInfo *pi;
1999 size = ntohs (message->size);
2001 sizeof (struct GNUNET_MESH_Unicast) +
2002 sizeof (struct GNUNET_MessageHeader))
2007 msg = (struct GNUNET_MESH_Unicast *) message;
2008 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2011 /* TODO notify back: we don't know this tunnel */
2012 GNUNET_break_op (0);
2015 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2016 &msg->destination.hashPubKey);
2019 /* TODO maybe feedback, log to statistics */
2020 GNUNET_break_op (0);
2025 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2028 msg = GNUNET_malloc (size);
2029 memcpy (msg, message, size);
2030 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2031 GNUNET_TIME_UNIT_FOREVER_REL,
2032 path_get_first_hop (t->tree, pi->id),
2034 &send_core_data_raw, msg);
2040 * Core handler for mesh network traffic going from the origin to all peers
2042 * @param cls closure
2043 * @param message message
2044 * @param peer peer identity this notification is about
2045 * @param atsi performance data
2046 * @return GNUNET_OK to keep the connection open,
2047 * GNUNET_SYSERR to close it (signal serious error)
2049 * TODO: Check who we got this from, to validate route.
2052 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2053 const struct GNUNET_MessageHeader *message,
2054 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2056 struct GNUNET_MESH_Multicast *msg;
2057 struct GNUNET_PeerIdentity *id;
2058 struct MeshDataDescriptor *info;
2059 struct MeshTunnelTreeNode *n;
2060 struct MeshTunnel *t;
2061 unsigned int *copies;
2066 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Multicast);
2067 if (size < sizeof (struct GNUNET_MessageHeader))
2069 GNUNET_break_op (0);
2072 msg = (struct GNUNET_MESH_Multicast *) message;
2073 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2077 /* TODO notify that we dont know that tunnel */
2078 GNUNET_break_op (0);
2082 /* Transmit to locally interested clients */
2083 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2085 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2087 n = t->tree->me->children_head;
2090 copies = GNUNET_malloc (sizeof (unsigned int));
2091 for (*copies = 0; NULL != n; n = n->next)
2093 n = t->tree->me->children_head;
2094 data = GNUNET_malloc (size);
2095 memcpy (data, &msg[1], size);
2098 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2099 info->origin = &t->id;
2102 info->copies = copies;
2103 info->client = t->client->handle;
2104 info->destination = n->peer;
2105 id = path_get_first_hop(t->tree, n->peer);
2106 info->peer = peer_info_get(id);
2107 GNUNET_assert (NULL != info->peer);
2108 for (i = 0; NULL != info->peer->core_transmit[i]; i++)
2110 if (i == (CORE_QUEUE_SIZE - 1))
2116 info->handler_n = i;
2117 info->peer->infos[i] = info;
2118 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2119 info->peer->core_transmit[i] =
2120 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2121 GNUNET_TIME_UNIT_FOREVER_REL, id,
2122 ntohs (msg->header.size),
2123 &send_core_data_multicast, info);
2131 * Core handler for mesh network traffic
2133 * @param cls closure
2134 * @param message message
2135 * @param peer peer identity this notification is about
2136 * @param atsi performance data
2138 * @return GNUNET_OK to keep the connection open,
2139 * GNUNET_SYSERR to close it (signal serious error)
2142 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2143 const struct GNUNET_MessageHeader *message,
2144 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2146 struct GNUNET_MESH_ToOrigin *msg;
2147 struct GNUNET_PeerIdentity id;
2148 struct MeshPeerInfo *peer_info;
2149 struct MeshTunnel *t;
2152 size = ntohs (message->size);
2153 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2154 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2156 GNUNET_break_op (0);
2159 msg = (struct GNUNET_MESH_ToOrigin *) message;
2160 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2164 /* TODO notify that we dont know this tunnel (whom)? */
2168 if (t->id.oid == myid)
2170 if (NULL == t->client)
2172 /* got data packet for ownerless tunnel */
2173 GNUNET_break_op (0);
2176 /* TODO signature verification */
2177 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
2181 peer_info = peer_info_get (&msg->oid);
2182 if (NULL == peer_info)
2184 /* unknown origin of tunnel */
2188 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2189 msg = GNUNET_malloc (size);
2190 memcpy (msg, message, size);
2191 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2192 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2193 &send_core_data_raw, msg);
2200 * Core handler for path ACKs
2202 * @param cls closure
2203 * @param message message
2204 * @param peer peer identity this notification is about
2205 * @param atsi performance data
2207 * @return GNUNET_OK to keep the connection open,
2208 * GNUNET_SYSERR to close it (signal serious error)
2211 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2212 const struct GNUNET_MessageHeader *message,
2213 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2215 struct GNUNET_MESH_PathACK *msg;
2216 struct MeshTunnelTreeNode *n;
2217 struct MeshPeerInfo *peer_info;
2218 struct MeshTunnel *t;
2220 msg = (struct GNUNET_MESH_PathACK *) message;
2221 t = tunnel_get (&msg->oid, msg->tid);
2224 /* TODO notify that we don't know the tunnel */
2228 /* Message for us? */
2229 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2231 if (NULL == t->client)
2233 GNUNET_break_op (0);
2236 peer_info = peer_info_get (&msg->peer_id);
2237 if (NULL == peer_info)
2239 GNUNET_break_op (0);
2242 n = tree_find_peer(t->tree->root, peer_info->id);
2245 GNUNET_break_op (0);
2248 n->status = MESH_PEER_READY;
2249 send_client_peer_connected(t, peer_info->id);
2253 peer_info = peer_info_get (&msg->oid);
2254 if (NULL == peer_info)
2256 /* If we know the tunnel, we should DEFINITELY know the peer */
2260 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2261 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2262 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2263 GNUNET_TIME_UNIT_FOREVER_REL,
2264 path_get_first_hop (t->tree,
2266 sizeof (struct GNUNET_MESH_PathACK),
2267 &send_core_data_raw, msg);
2273 * Functions to handle messages from core
2275 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2276 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2277 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2278 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2279 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2280 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2281 sizeof (struct GNUNET_MESH_PathACK)},
2287 /******************************************************************************/
2288 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2289 /******************************************************************************/
2292 * deregister_app: iterator for removing each application registered by a client
2294 * @param cls closure
2295 * @param key the hash of the application id (used to access the hashmap)
2296 * @param value the value stored at the key (client)
2298 * @return GNUNET_OK on success
2301 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2303 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2309 * notify_client_connection_failure: notify a client that the connection to the
2310 * requested remote peer is not possible (for instance, no route found)
2311 * Function called when the socket is ready to queue more data. "buf" will be
2312 * NULL and "size" zero if the socket was closed for writing in the meantime.
2314 * @param cls closure
2315 * @param size number of bytes available in buf
2316 * @param buf where the callee should write the message
2317 * @return number of bytes written to buf
2320 notify_client_connection_failure (void *cls, size_t size, void *buf)
2323 struct MeshPeerInfo *peer_info;
2324 struct GNUNET_MESH_PeerControl *msg;
2325 struct GNUNET_PeerIdentity id;
2327 if (0 == size && NULL == buf)
2329 // TODO retry? cancel?
2333 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2334 peer_info = (struct MeshPeerInfo *) cls;
2335 msg = (struct GNUNET_MESH_PeerControl *) buf;
2336 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2337 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2338 // msg->tunnel_id = htonl(peer_info->t->tid);
2339 GNUNET_PEER_resolve (peer_info->id, &id);
2340 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2348 * Send keepalive packets for a peer
2350 * @param cls Closure (tunnel for which to send the keepalive).
2351 * @param tc Notification context.
2353 * TODO: implement explicit multicast keepalive?
2356 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2358 struct MeshTunnel *t = cls;
2359 struct GNUNET_MessageHeader *payload;
2360 struct GNUNET_MESH_Multicast *msg;
2363 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2364 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2370 "MESH: sending keepalive for tunnel %d\n",
2373 size = sizeof(struct GNUNET_MESH_Multicast) +
2374 sizeof(struct GNUNET_MessageHeader);
2375 msg = GNUNET_malloc (size);
2376 msg->header.size = htons (size);
2377 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2378 msg->oid = my_full_id;
2379 msg->tid = htonl(t->id.tid);
2380 payload = (struct GNUNET_MessageHeader *) &msg[1];
2381 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2382 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2383 handle_mesh_data_multicast (NULL, &my_full_id, &msg->header, NULL);
2386 t->path_refresh_task =
2387 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
2393 * Function to process paths received for a new peer addition. The recorded
2394 * paths form the initial tunnel, which can be optimized later.
2395 * Called on each result obtained for the DHT search.
2397 * @param cls closure
2398 * @param exp when will this value expire
2399 * @param key key of the result
2400 * @param type type of the result
2401 * @param size number of bytes in data
2402 * @param data pointer to the result data
2404 * TODO: re-issue the request after certain time? cancel after X results?
2407 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2408 const GNUNET_HashCode * key,
2409 const struct GNUNET_PeerIdentity *get_path,
2410 unsigned int get_path_length,
2411 const struct GNUNET_PeerIdentity *put_path,
2412 unsigned int put_path_length,
2413 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2415 struct MeshPathInfo *path_info = cls;
2416 struct MeshPeerPath *p;
2417 struct GNUNET_PeerIdentity pi;
2420 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2421 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2422 "MESH: Got results from DHT for %s\n",
2423 GNUNET_h2s_full(&pi.hashPubKey));
2424 GNUNET_DHT_get_stop(path_info->peer->dhtget);
2425 path_info->peer->dhtget = NULL;
2427 p = path_build_from_dht (get_path, get_path_length,
2428 put_path, put_path_length);
2429 path_add_to_peer (path_info->peer, p);
2430 for (i = 0; i < path_info->peer->ntunnels; i++)
2432 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2433 peer_info_connect(path_info->peer, path_info->t);
2435 GNUNET_free (path_info);
2442 * Function to process paths received for a new peer addition. The recorded
2443 * paths form the initial tunnel, which can be optimized later.
2444 * Called on each result obtained for the DHT search.
2446 * @param cls closure
2447 * @param exp when will this value expire
2448 * @param key key of the result
2449 * @param type type of the result
2450 * @param size number of bytes in data
2451 * @param data pointer to the result data
2454 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2455 const GNUNET_HashCode * key,
2456 const struct GNUNET_PeerIdentity *get_path,
2457 unsigned int get_path_length,
2458 const struct GNUNET_PeerIdentity *put_path,
2459 unsigned int put_path_length,
2460 enum GNUNET_BLOCK_Type type, size_t size,
2463 const struct GNUNET_PeerIdentity *pi = data;
2464 struct GNUNET_PeerIdentity id;
2465 struct MeshTunnel *t = cls;
2466 struct MeshPeerInfo *peer_info;
2467 struct MeshPathInfo *path_info;
2468 struct MeshPeerPath *p;
2471 if (size != sizeof (struct GNUNET_PeerIdentity))
2473 GNUNET_break_op (0);
2476 GNUNET_assert (NULL != t->client);
2477 GNUNET_DHT_get_stop (t->dht_get_type);
2478 t->dht_get_type = NULL;
2479 peer_info = peer_info_get (pi);
2480 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2481 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2483 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2484 NULL == peer_info->dhtget)
2486 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2487 path_info->peer = peer_info;
2489 /* we don't have a route to the peer, let's try a direct lookup */
2491 GNUNET_DHT_get_start (dht_handle, /* handle */
2492 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2493 GNUNET_BLOCK_TYPE_TEST, /* block type */
2494 &pi->hashPubKey, /* key to look up */
2495 10U, /* replication level */
2496 GNUNET_DHT_RO_RECORD_ROUTE |
2497 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2498 /* option to dht: record route */
2500 0, /* xquery bits */
2501 dht_get_id_handler, /* callback */
2502 path_info); /* closure */
2506 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2507 path_add_to_peer (peer_info, p);
2508 tunnel_add_peer(t, peer_info);
2509 p = tree_get_path_to_peer(t->tree, peer_info->id);
2511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2512 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2513 t->local_tid, p->length);
2514 for (i = 0; i < p->length; i++)
2516 GNUNET_PEER_resolve (p->peers[0], &id);
2517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2518 GNUNET_h2s_full (&id.hashPubKey));
2524 send_create_path(peer_info, p, t);
2528 send_client_peer_connected(t, myid);
2532 /******************************************************************************/
2533 /********************* MESH LOCAL HANDLES **************************/
2534 /******************************************************************************/
2538 * Handler for client disconnection
2540 * @param cls closure
2541 * @param client identification of the client; NULL
2542 * for the last call when the server is destroyed
2545 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2547 struct MeshClient *c;
2548 struct MeshClient *next;
2550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2556 if (c->handle != client && NULL != client)
2558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2562 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2563 if (NULL != c->tunnels)
2565 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2566 &tunnel_destroy_iterator,
2568 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2571 /* deregister clients applications */
2572 if (NULL != c->apps)
2574 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2575 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2577 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2578 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2580 GNUNET_SCHEDULER_cancel (announce_applications_task);
2581 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2583 if (NULL != c->types)
2584 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2585 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2597 * Handler for new clients
2599 * @param cls closure
2600 * @param client identification of the client
2601 * @param message the actual message, which includes messages the client wants
2604 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2605 const struct GNUNET_MessageHeader *message)
2607 struct GNUNET_MESH_ClientConnect *cc_msg;
2608 struct MeshClient *c;
2609 GNUNET_MESH_ApplicationType *a;
2616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2617 /* Check data sanity */
2618 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2619 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2620 ntypes = ntohs (cc_msg->types);
2621 napps = ntohs (cc_msg->applications);
2623 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2626 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2630 /* Create new client structure */
2631 c = GNUNET_malloc (sizeof (struct MeshClient));
2633 c->id = next_client_id++;
2636 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2639 GNUNET_MESH_ApplicationType at;
2642 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2643 for (i = 0; i < napps; i++)
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2647 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2648 /* store in clients hashmap */
2649 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2650 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2651 /* store in global hashmap, for announcements */
2652 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2653 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2655 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2656 announce_applications_task =
2657 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2665 t = (uint16_t *) & a[napps];
2666 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2667 for (i = 0; i < ntypes; i++)
2670 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2672 /* store in clients hashmap */
2673 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2674 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2675 /* store in global hashmap */
2676 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2677 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2681 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2683 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2684 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2685 GNUNET_SERVER_notification_context_add (nc, client);
2687 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2695 * Handler for requests of new tunnels
2697 * @param cls closure
2698 * @param client identification of the client
2699 * @param message the actual message
2702 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2703 const struct GNUNET_MessageHeader *message)
2705 struct GNUNET_MESH_TunnelMessage *t_msg;
2706 struct MeshTunnel *t;
2707 struct MeshClient *c;
2708 GNUNET_HashCode hash;
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2712 /* Sanity check for client registration */
2713 if (NULL == (c = client_get (client)))
2716 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2723 /* Message sanity check */
2724 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2727 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2731 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2732 /* Sanity check for tunnel numbering */
2733 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2736 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2739 /* Sanity check for duplicate tunnel IDs */
2740 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2743 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2747 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2749 while (NULL != tunnel_get_by_pi (myid, next_tid))
2750 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2751 t->id.tid = next_tid++;
2753 t->local_tid = ntohl (t_msg->tunnel_id);
2755 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2757 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2759 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2760 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2763 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2767 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2769 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2770 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2773 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2776 t->tree = tree_new (t, myid);
2777 t->tree->refresh = REFRESH_PATH_TIME;
2778 t->tree->root->status = MESH_PEER_READY;
2779 t->tree->me = t->tree->root;
2781 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2787 * Handler for requests of deleting tunnels
2789 * @param cls closure
2790 * @param client identification of the client
2791 * @param message the actual message
2794 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2795 const struct GNUNET_MessageHeader *message)
2797 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2798 struct MeshClient *c;
2799 struct MeshTunnel *t;
2800 MESH_TunnelNumber tid;
2801 GNUNET_HashCode hash;
2803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2805 /* Sanity check for client registration */
2806 if (NULL == (c = client_get (client)))
2809 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2812 /* Message sanity check */
2813 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2816 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2822 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2824 /* Retrieve tunnel */
2825 tid = ntohl (tunnel_msg->tunnel_id);
2827 /* Remove from local id hashmap */
2828 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2829 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2830 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2832 /* Remove from global id hashmap */
2833 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2834 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2836 // notify_tunnel_destroy(t); FIXME
2838 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2844 * Handler for connection requests to new peers
2846 * @param cls closure
2847 * @param client identification of the client
2848 * @param message the actual message (PeerControl)
2851 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2852 const struct GNUNET_MessageHeader *message)
2854 struct GNUNET_MESH_PeerControl *peer_msg;
2855 struct MeshPeerInfo *peer_info;
2856 struct MeshClient *c;
2857 struct MeshTunnel *t;
2858 MESH_TunnelNumber tid;
2860 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
2861 /* Sanity check for client registration */
2862 if (NULL == (c = client_get (client)))
2865 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2869 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2870 /* Sanity check for message size */
2871 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2874 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2878 /* Tunnel exists? */
2879 tid = ntohl (peer_msg->tunnel_id);
2880 t = tunnel_get_by_local_id (c, tid);
2884 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2888 /* Does client own tunnel? */
2889 if (t->client->handle != client)
2892 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2895 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
2896 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
2897 peer_info = peer_info_get (&peer_msg->peer);
2899 tunnel_add_peer(t, peer_info);
2900 peer_info_connect(peer_info, t);
2902 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2908 * Handler for disconnection requests of peers in a tunnel
2910 * @param cls closure
2911 * @param client identification of the client
2912 * @param message the actual message (PeerControl)
2915 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2916 const struct GNUNET_MessageHeader *message)
2918 struct GNUNET_MESH_PeerControl *peer_msg;
2919 struct MeshClient *c;
2920 struct MeshTunnel *t;
2921 MESH_TunnelNumber tid;
2923 /* Sanity check for client registration */
2924 if (NULL == (c = client_get (client)))
2927 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2930 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2931 /* Sanity check for message size */
2932 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2935 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2939 /* Tunnel exists? */
2940 tid = ntohl (peer_msg->tunnel_id);
2941 t = tunnel_get_by_local_id (c, tid);
2945 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2949 /* Does client own tunnel? */
2950 if (t->client->handle != client)
2953 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2957 /* Ok, delete peer from tunnel */
2958 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2959 &peer_msg->peer.hashPubKey);
2961 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2967 * Handler for connection requests to new peers by type
2969 * @param cls closure
2970 * @param client identification of the client
2971 * @param message the actual message (ConnectPeerByType)
2974 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2975 const struct GNUNET_MessageHeader *message)
2977 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2978 struct MeshClient *c;
2979 struct MeshTunnel *t;
2980 GNUNET_HashCode hash;
2981 MESH_TunnelNumber tid;
2983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
2984 /* Sanity check for client registration */
2985 if (NULL == (c = client_get (client)))
2988 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2992 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2993 /* Sanity check for message size */
2994 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
2995 ntohs (connect_msg->header.size))
2998 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3002 /* Tunnel exists? */
3003 tid = ntohl (connect_msg->tunnel_id);
3004 t = tunnel_get_by_local_id (c, tid);
3008 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3012 /* Does client own tunnel? */
3013 if (t->client->handle != client)
3016 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3020 /* Do WE have the service? */
3021 t->type = ntohl (connect_msg->type);
3022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3023 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3024 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3027 /* Yes! Fast forward, add ourselves to the tunnel and send the
3028 * good news to the client
3030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3031 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3032 peer_info_get (&my_full_id),
3033 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3036 send_client_peer_connected(t, myid);
3037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3038 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3041 /* Ok, lets find a peer offering the service */
3042 if (NULL != t->dht_get_type)
3044 GNUNET_DHT_get_stop (t->dht_get_type);
3046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3047 GNUNET_h2s_full (&hash));
3049 GNUNET_DHT_get_start (dht_handle,
3050 GNUNET_TIME_UNIT_FOREVER_REL,
3051 GNUNET_BLOCK_TYPE_TEST,
3054 GNUNET_DHT_RO_RECORD_ROUTE |
3055 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3057 &dht_get_type_handler, t);
3059 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3065 * Handler for client traffic directed to one peer
3067 * @param cls closure
3068 * @param client identification of the client
3069 * @param message the actual message
3072 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3073 const struct GNUNET_MessageHeader *message)
3075 struct MeshClient *c;
3076 struct MeshTunnel *t;
3077 struct MeshPeerInfo *pi;
3078 struct GNUNET_MESH_Unicast *data_msg;
3079 MESH_TunnelNumber tid;
3082 /* Sanity check for client registration */
3083 if (NULL == (c = client_get (client)))
3086 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3089 data_msg = (struct GNUNET_MESH_Unicast *) message;
3090 /* Sanity check for message size */
3091 size = ntohs (message->size);
3092 if (sizeof (struct GNUNET_MESH_Unicast) +
3093 sizeof (struct GNUNET_MessageHeader) > size)
3096 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3100 /* Tunnel exists? */
3101 tid = ntohl (data_msg->tid);
3102 t = tunnel_get_by_local_id (c, tid);
3106 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3110 /* Is it a local tunnel? Then, does client own the tunnel? */
3111 if (t->client->handle != NULL && t->client->handle != client)
3114 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3118 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3119 &data_msg->destination.hashPubKey);
3120 /* Is the selected peer in the tunnel? */
3124 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3128 /* Ok, everything is correct, send the message
3129 * (pretend we got it from a mesh peer)
3132 char buf[ntohs (message->size)];
3133 struct GNUNET_MESH_Unicast *copy;
3135 /* Work around const limitation */
3136 copy = (struct GNUNET_MESH_Unicast *) buf;
3137 memcpy (buf, data_msg, size);
3138 copy->oid = my_full_id;
3139 copy->tid = htonl (t->id.tid);
3140 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL);
3142 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3147 * Handler for client traffic directed to all peers in a tunnel
3149 * @param cls closure
3150 * @param client identification of the client
3151 * @param message the actual message
3154 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3155 const struct GNUNET_MessageHeader *message)
3157 struct MeshClient *c;
3158 struct MeshTunnel *t;
3159 struct GNUNET_MESH_Multicast *data_msg;
3160 MESH_TunnelNumber tid;
3162 /* Sanity check for client registration */
3163 if (NULL == (c = client_get (client)))
3166 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3169 data_msg = (struct GNUNET_MESH_Multicast *) message;
3170 /* Sanity check for message size */
3171 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3174 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3178 /* Tunnel exists? */
3179 tid = ntohl (data_msg->tid);
3180 t = tunnel_get_by_local_id (c, tid);
3184 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3188 /* Does client own tunnel? */
3189 if (t->client->handle != client)
3192 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3197 char buf[ntohs(message->size)];
3198 struct GNUNET_MESH_Multicast *copy;
3200 copy = (struct GNUNET_MESH_Multicast *)buf;
3201 memcpy(buf, message, ntohs(message->size));
3202 copy->oid = my_full_id;
3203 copy->tid = htonl(t->id.tid);
3204 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL);
3207 /* receive done gets called when last copy is sent */
3212 * Functions to handle messages from clients
3214 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3215 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3216 {&handle_local_tunnel_create, NULL,
3217 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3218 sizeof (struct GNUNET_MESH_TunnelMessage)},
3219 {&handle_local_tunnel_destroy, NULL,
3220 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3221 sizeof (struct GNUNET_MESH_TunnelMessage)},
3222 {&handle_local_connect_add, NULL,
3223 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3224 sizeof (struct GNUNET_MESH_PeerControl)},
3225 {&handle_local_connect_del, NULL,
3226 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3227 sizeof (struct GNUNET_MESH_PeerControl)},
3228 {&handle_local_connect_by_type, NULL,
3229 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3230 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3231 {&handle_local_unicast, NULL,
3232 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3233 {&handle_local_unicast, NULL,
3234 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3235 {&handle_local_multicast, NULL,
3236 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3242 * To be called on core init/fail.
3244 * @param cls service closure
3245 * @param server handle to the server for this service
3246 * @param identity the public identity of this peer
3249 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3250 const struct GNUNET_PeerIdentity *identity)
3252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3253 core_handle = server;
3254 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3256 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3257 GNUNET_SCHEDULER_shutdown();
3263 * Method called whenever a given peer connects.
3265 * @param cls closure
3266 * @param peer peer identity this notification is about
3267 * @param atsi performance data for the connection
3270 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3271 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3273 struct MeshPeerInfo *peer_info;
3274 struct MeshPeerPath *path;
3276 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3278 GNUNET_h2s(&my_full_id.hashPubKey));
3279 peer_info = peer_info_get (peer);
3280 if (myid == peer_info->id)
3282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3288 GNUNET_h2s(&peer->hashPubKey));
3290 path = path_new (2);
3291 path->peers[0] = myid;
3292 path->peers[1] = peer_info->id;
3293 GNUNET_PEER_change_rc(myid, 1);
3294 GNUNET_PEER_change_rc(peer_info->id, 1);
3295 path_add_to_peer (peer_info, path);
3300 * Method called whenever a peer disconnects.
3302 * @param cls closure
3303 * @param peer peer identity this notification is about
3306 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3308 struct MeshPeerInfo *pi;
3311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3312 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3318 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3320 peer_info_cancel_transmission(pi, i);
3322 path_remove_from_peer (pi, pi->id, myid);
3325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3331 /******************************************************************************/
3332 /************************ MAIN FUNCTIONS ****************************/
3333 /******************************************************************************/
3336 * Iterator over hash map entries.
3338 * @param cls closure
3339 * @param key current key code
3340 * @param value value in the hash map
3341 * @return GNUNET_YES if we should continue to
3346 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
3348 struct MeshTunnel *t = value;
3354 * Task run during shutdown.
3360 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3363 /* TODO: destroy tunnels? */
3364 if (core_handle != NULL)
3366 GNUNET_CORE_disconnect (core_handle);
3369 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
3370 if (dht_handle != NULL)
3372 GNUNET_DHT_disconnect (dht_handle);
3377 GNUNET_SERVER_notification_context_destroy (nc);
3380 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3382 GNUNET_SCHEDULER_cancel (announce_id_task);
3383 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3389 * Process mesh requests.
3391 * @param cls closure
3392 * @param server the initialized server
3393 * @param c configuration to use
3396 run (void *cls, struct GNUNET_SERVER_Handle *server,
3397 const struct GNUNET_CONFIGURATION_Handle *c)
3399 struct MeshPeerInfo *peer;
3400 struct MeshPeerPath *p;
3403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3404 server_handle = server;
3405 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3406 CORE_QUEUE_SIZE, /* queue size */
3407 NULL, /* Closure passed to MESH functions */
3408 &core_init, /* Call core_init once connected */
3409 &core_connect, /* Handle connects */
3410 &core_disconnect, /* remove peers on disconnects */
3411 NULL, /* Don't notify about all incoming messages */
3412 GNUNET_NO, /* For header only in notification */
3413 NULL, /* Don't notify about all outbound messages */
3414 GNUNET_NO, /* For header-only out notification */
3415 core_handlers); /* Register these handlers */
3416 if (core_handle == NULL)
3419 GNUNET_SCHEDULER_shutdown ();
3424 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3427 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3429 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3430 GNUNET_SCHEDULER_shutdown ();
3433 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3434 GNUNET_free (keyfile);
3435 if (my_private_key == NULL)
3437 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3438 _("Mesh service could not access hostkey. Exiting.\n"));
3439 GNUNET_SCHEDULER_shutdown ();
3442 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3443 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3444 &my_full_id.hashPubKey);
3445 myid = GNUNET_PEER_intern (&my_full_id);
3447 dht_handle = GNUNET_DHT_connect (c, 64);
3448 if (dht_handle == NULL)
3454 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3456 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3457 peers = GNUNET_CONTAINER_multihashmap_create (32);
3458 applications = GNUNET_CONTAINER_multihashmap_create (32);
3459 types = GNUNET_CONTAINER_multihashmap_create (32);
3461 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3462 nc = GNUNET_SERVER_notification_context_create (server_handle,
3464 GNUNET_SERVER_disconnect_notify (server_handle,
3465 &handle_local_client_disconnect,
3470 clients_tail = NULL;
3475 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3476 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3478 /* Create a peer_info for the local peer */
3479 peer = peer_info_get(&my_full_id);
3482 path_add_to_peer(peer, p);
3484 /* Scheduled the task to clean up when shutdown is called */
3485 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3492 * The main function for the mesh service.
3494 * @param argc number of arguments from the command line
3495 * @param argv command line arguments
3496 * @return 0 ok, 1 on error
3499 main (int argc, char *const *argv)
3504 // fprintf (stderr, "main ()\n");
3506 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3509 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3513 // fprintf (stderr, "main () END\n");