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.
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16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - 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_slot (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;
862 p = tree_get_path_to_peer(t->tree, peer->id);
869 for (i = 0; i < p->length; i++)
871 if (p->peers[i] == myid)
874 if (i >= p->length - 1)
879 GNUNET_PEER_resolve(p->peers[i + 1], &id);
881 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
883 path_info->peer = peer;
885 neighbor = peer_info_get(&id);
886 path_info->pos = peer_info_transmit_slot(neighbor);
887 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
888 neighbor->infos[path_info->pos] = path_info;
889 neighbor->core_transmit[path_info->pos] =
890 GNUNET_CORE_notify_transmit_ready (
891 core_handle, /* handle */
894 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
896 sizeof (struct GNUNET_MESH_ManipulatePath)
897 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
898 &send_core_create_path, /* callback */
899 path_info); /* cls */
904 * Try to establish a new connection to this peer.
905 * Use the best path for the given tunnel.
906 * If the peer doesn't have any path to it yet, try to get one.
907 * If the peer already has some path, send a CREATE PATH towards it.
909 * @param peer PeerInfo of the peer.
910 * @param t Tunnel for which to create the path, if possible.
913 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
915 struct MeshPeerPath *p;
916 struct MeshPathInfo *path_info;
918 if (NULL != peer->path_head)
920 p = tree_get_path_to_peer(t->tree, peer->id);
923 send_create_path(peer, p, t);
928 send_client_peer_connected(t, myid);
931 else if (NULL == peer->dhtget)
933 struct GNUNET_PeerIdentity id;
935 GNUNET_PEER_resolve(peer->id, &id);
936 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
937 path_info->peer = peer;
940 GNUNET_DHT_get_start(dht_handle, /* handle */
941 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
942 GNUNET_BLOCK_TYPE_TEST, /* type */
943 &id.hashPubKey, /* key to search */
944 4, /* replication level */
945 GNUNET_DHT_RO_RECORD_ROUTE |
946 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
952 /* Otherwise, there is no path but the DHT get is already started. */
958 * Destroy the peer_info and free any allocated resources linked to it
959 * @param t tunnel the path belongs to
960 * @param pi the peer_info to destroy
961 * @return GNUNET_OK on success
964 peer_info_destroy (struct MeshPeerInfo *pi)
966 GNUNET_HashCode hash;
967 struct GNUNET_PeerIdentity id;
969 GNUNET_PEER_resolve (pi->id, &id);
970 GNUNET_PEER_change_rc (pi->id, -1);
971 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
973 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
974 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
982 * Notify a tunnel that a connection has broken that affects at least
985 * @param t Tunnel affected.
986 * @param peer Peer that (at least) has been affected by the disconnection.
987 * @param p1 Peer that got disconnected from p2.
988 * @param p2 Peer that got disconnected from p1.
990 * @return Short ID of the peer disconnected (either p1 or p2).
991 * 0 if the tunnel remained unaffected.
993 static GNUNET_PEER_Id
994 tunnel_notify_connection_broken (struct MeshTunnel *t,
995 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
999 * Remove all paths that rely on a direct connection between p1 and p2
1000 * from the peer itself and notify all tunnels about it.
1002 * @param peer PeerInfo of affected peer.
1003 * @param p1 GNUNET_PEER_Id of one peer.
1004 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1007 * TODO: optimize (see below)
1010 path_remove_from_peer (struct MeshPeerInfo *peer,
1014 struct GNUNET_PeerIdentity id;
1015 struct MeshPeerPath *p;
1016 struct MeshPeerPath *aux;
1017 struct MeshPeerInfo *peer_d;
1019 unsigned int destroyed;
1025 p = peer->path_head;
1029 for (i = 0; i < (p->length - 1); i++)
1031 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1032 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1044 for (i = 0; i < peer->ntunnels; i++)
1046 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
1048 * Problem: one or more peers have been deleted from the tunnel tree.
1049 * We don't know who they are to try to add them again.
1050 * We need to try to find a new path for each of the disconnected peers.
1051 * Some of them might already have a path to reach them that does not
1052 * involve p1 and p2. Adding all anew might render in a better tree than
1053 * the trivial immediate fix.
1055 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1056 * its children will be reachable trough him.
1058 peer_d = peer_info_get_short(d);
1061 for (p = peer_d->path_head; NULL != p; p = p->next)
1063 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1071 /* No callback, as peer will be already disconnected */
1072 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1076 struct MeshPathInfo *path_info;
1078 if (NULL != peer_d->dhtget)
1080 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1081 path_info->path = p;
1082 path_info->peer = peer_d;
1083 path_info->t = peer->tunnels[i];
1085 GNUNET_DHT_get_start(dht_handle, /* handle */
1086 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1087 GNUNET_BLOCK_TYPE_TEST, /* type */
1088 &id.hashPubKey, /*key to search */
1089 4, /* replication level */
1090 GNUNET_DHT_RO_RECORD_ROUTE |
1091 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1093 0, /* xquery bits */
1094 &dht_get_id_handler,
1095 (void *) path_info);
1102 * Add the path to the peer and update the path used to reach it in case this
1105 * @param peer_info Destination peer to add the path to.
1106 * @param path New path to add. Last peer must be the peer in arg 1.
1107 * Path will be either used of freed if already known.
1109 * TODO: trim the part from origin to us? Add it as path to origin?
1112 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1114 struct MeshPeerPath *aux;
1118 if (NULL == peer_info || NULL == path)
1124 l = path_get_length (path);
1131 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1133 l2 = path_get_length (aux);
1136 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1137 peer_info->path_tail, aux, path);
1141 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1148 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1155 * Add the path to the origin peer and update the path used to reach it in case
1156 * this is the shortest.
1157 * The path is given in peer_info -> destination, therefore we turn the path
1158 * upside down first.
1160 * @param peer_info Peer to add the path to, being the origin of the path.
1161 * @param path New path to add after being inversed.
1164 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1167 path_add_to_peer (peer_info, path);
1172 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1173 * to obtain a local peer -> destination path and interning the peer ids.
1175 * @return Newly allocated and created path
1177 static struct MeshPeerPath *
1178 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1179 unsigned int get_path_length,
1180 const struct GNUNET_PeerIdentity *put_path,
1181 unsigned int put_path_length)
1183 struct MeshPeerPath *p;
1189 GNUNET_PEER_change_rc(myid, 1);
1190 i = get_path_length;
1191 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1192 for (i--; i >= 0; i--)
1194 id = GNUNET_PEER_intern (&get_path[i]);
1195 if (p->length > 0 && id == p->peers[p->length - 1])
1197 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1198 GNUNET_PEER_change_rc(id, -1);
1202 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1203 "MESH: Adding from GET: %s.\n",
1204 GNUNET_i2s(&get_path[i]));
1206 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1207 p->peers[p->length - 1] = id;
1210 i = put_path_length;
1211 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1212 for (i--; i >= 0; i--)
1214 id = GNUNET_PEER_intern (&put_path[i]);
1217 /* PUT path went through us, so discard the path up until now and start
1218 * from here to get a much shorter (and loop-free) path.
1223 if (p->length > 0 && id == p->peers[p->length - 1])
1225 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1226 GNUNET_PEER_change_rc(id, -1);
1230 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1231 "MESH: Adding from PUT: %s.\n",
1232 GNUNET_i2s(&put_path[i]));
1234 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1235 p->peers[p->length - 1] = id;
1239 if (get_path_length > 0)
1240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1241 "MESH: (first of GET: %s)\n",
1242 GNUNET_h2s_full(&get_path[0].hashPubKey));
1243 if (put_path_length > 0)
1244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1245 "MESH: (first of PUT: %s)\n",
1246 GNUNET_h2s_full(&put_path[0].hashPubKey));
1247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1248 "MESH: In total: %d hops\n",
1250 for (i = 0; i < p->length; i++)
1252 struct GNUNET_PeerIdentity peer_id;
1254 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1255 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1258 GNUNET_h2s_full(&peer_id.hashPubKey));
1266 * Send keepalive packets for a peer
1268 * @param cls Closure (tunnel for which to send the keepalive).
1269 * @param tc Notification context.
1271 * TODO: implement explicit multicast keepalive?
1274 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1278 * Search for a tunnel among the tunnels for a client
1280 * @param c the client whose tunnels to search in
1281 * @param tid the local id of the tunnel
1283 * @return tunnel handler, NULL if doesn't exist
1285 static struct MeshTunnel *
1286 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1288 GNUNET_HashCode hash;
1290 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1291 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1296 * Search for a tunnel by global ID using PEER_ID
1298 * @param pi owner of the tunnel
1299 * @param tid global tunnel number
1301 * @return tunnel handler, NULL if doesn't exist
1303 static struct MeshTunnel *
1304 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1306 struct MESH_TunnelID id;
1307 GNUNET_HashCode hash;
1312 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1313 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1318 * Search for a tunnel by global ID using full PeerIdentities
1320 * @param oid owner of the tunnel
1321 * @param tid global tunnel number
1323 * @return tunnel handler, NULL if doesn't exist
1325 static struct MeshTunnel *
1326 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1328 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1333 * Callback used to notify a client owner of a tunnel that a peer has
1334 * disconnected, most likely because of a path change.
1336 * @param n Node in the tree representing the disconnected peer
1339 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1341 struct MeshPeerInfo *peer;
1343 if (NULL != n->t->client && NULL != nc)
1345 struct GNUNET_MESH_PeerControl msg;
1346 msg.header.size = htons (sizeof (msg));
1347 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1348 msg.tunnel_id = htonl (n->t->local_tid);
1349 GNUNET_PEER_resolve (n->peer, &msg.peer);
1350 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1351 &msg.header, GNUNET_NO);
1353 peer = peer_info_get_short(n->peer);
1354 peer_info_connect(peer, n->t);
1359 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1360 * needed rescources.
1361 * If peer already exists, reevaluate shortest path and change if different.
1363 * @param t Tunnel we want to add a new peer to
1364 * @param peer PeerInfo of the peer being added
1368 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1370 struct GNUNET_PeerIdentity id;
1371 struct MeshPeerPath *best_p;
1372 struct MeshPeerPath *p;
1373 unsigned int best_cost;
1376 GNUNET_PEER_resolve(peer->id, &id);
1378 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1381 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1382 GNUNET_CONTAINER_multihashmap_put(
1386 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1389 if (NULL != (p = peer->path_head))
1392 best_cost = path_get_cost(t->tree, p);
1395 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1402 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1403 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1404 t->path_refresh_task =
1405 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1409 /* Start a DHT get if necessary */
1410 peer_info_connect(peer, t);
1415 * Add a path to a tunnel which we don't own, just to remember the next hop.
1416 * If destination node was already in the tunnel, the first hop information
1417 * will be replaced with the new path.
1419 * @param t Tunnel we want to add a new peer to
1420 * @param p Path to add
1421 * @param own_pos Position of local node in path.
1425 tunnel_add_path (struct MeshTunnel *t,
1426 struct MeshPeerPath *p,
1427 unsigned int own_pos)
1429 GNUNET_assert (0 != own_pos);
1430 tree_add_path(t->tree, p, NULL);
1431 if (NULL == t->tree->me)
1432 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1437 * Notify a tunnel that a connection has broken that affects at least
1438 * some of its peers.
1440 * @param t Tunnel affected.
1441 * @param peer Peer that (at least) has been affected by the disconnection.
1442 * @param p1 Peer that got disconnected from p2.
1443 * @param p2 Peer that got disconnected from p1.
1445 * @return Short ID of the peer disconnected (either p1 or p2).
1446 * 0 if the tunnel remained unaffected.
1448 static GNUNET_PEER_Id
1449 tunnel_notify_connection_broken (struct MeshTunnel *t,
1450 struct MeshPeerInfo *peer,
1454 return tree_notify_connection_broken (t->tree, p1, p2,
1455 ¬ify_peer_disconnected);
1460 * Destroy the tunnel and free any allocated resources linked to it
1462 * @param t the tunnel to destroy
1464 * @return GNUNET_OK on success
1467 tunnel_destroy (struct MeshTunnel *t)
1469 struct MeshClient *c;
1470 struct MeshQueue *q;
1471 struct MeshQueue *qn;
1472 GNUNET_HashCode hash;
1475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1484 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1485 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1490 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1491 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1495 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1499 if (NULL != q->data)
1500 GNUNET_free (q->data);
1504 /* TODO cancel core transmit ready in case it was active */
1506 tree_destroy(t->tree);
1507 if (NULL != t->dht_get_type)
1508 GNUNET_DHT_get_stop(t->dht_get_type);
1509 t->dht_get_type = NULL;
1516 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1517 * client when the client disconnects.
1519 * @param cls closure (client that is disconnecting)
1520 * @param key the hash of the local tunnel id (used to access the hashmap)
1521 * @param value the value stored at the key (tunnel to destroy)
1523 * @return GNUNET_OK on success
1526 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1528 struct MeshTunnel *t = value;
1531 if (NULL != t->dht_get_type)
1533 GNUNET_DHT_get_stop (t->dht_get_type);
1535 r = tunnel_destroy (t);
1540 /******************************************************************************/
1541 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1542 /******************************************************************************/
1545 * Function called to notify a client about the socket
1546 * being ready to queue more data. "buf" will be
1547 * NULL and "size" zero if the socket was closed for
1548 * writing in the meantime.
1550 * @param cls closure
1551 * @param size number of bytes available in buf
1552 * @param buf where the callee should write the message
1553 * @return number of bytes written to buf
1556 send_core_create_path (void *cls, size_t size, void *buf)
1558 struct MeshPathInfo *info = cls;
1559 struct GNUNET_MESH_ManipulatePath *msg;
1560 struct GNUNET_PeerIdentity *peer_ptr;
1561 struct MeshPeerInfo *peer = info->peer;
1562 struct MeshTunnel *t = info->t;
1563 struct MeshPeerPath *p = info->path;
1568 sizeof (struct GNUNET_MESH_ManipulatePath) +
1569 p->length * sizeof (struct GNUNET_PeerIdentity);
1571 if (size < size_needed || NULL == buf)
1573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
1574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
1575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
1577 info->peer->core_transmit[info->pos] =
1578 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1579 GNUNET_TIME_UNIT_FOREVER_REL,
1580 path_get_first_hop (t->tree, peer->id),
1582 &send_core_create_path,
1587 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1588 msg->header.size = htons (size_needed);
1589 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1590 msg->tid = ntohl (t->id.tid);
1592 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1593 for (i = 0; i < p->length; i++)
1595 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1602 "MESH: CREATE PATH (%u bytes long) sent!\n",
1610 * Function called to notify a client about the socket
1611 * being ready to queue more data. "buf" will be
1612 * NULL and "size" zero if the socket was closed for
1613 * writing in the meantime.
1615 * @param cls closure (MeshDataDescriptor with all info to build packet)
1616 * @param size number of bytes available in buf
1617 * @param buf where the callee should write the message
1618 * @return number of bytes written to buf
1621 send_core_data_to_origin (void *cls, size_t size, void *buf)
1623 struct MeshDataDescriptor *info = cls;
1624 struct GNUNET_MESH_ToOrigin *msg = buf;
1627 GNUNET_assert (NULL != info);
1628 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1629 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1631 if (total_size > size)
1633 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1634 "not enough buffer to send data to origin\n");
1637 msg->header.size = htons (total_size);
1638 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1639 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1640 msg->tid = htonl (info->origin->tid);
1641 if (0 != info->size)
1643 memcpy (&msg[1], &info[1], info->size);
1645 if (NULL != info->client)
1647 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1656 * Function called to notify a client about the socket
1657 * being ready to queue more data. "buf" will be
1658 * NULL and "size" zero if the socket was closed for
1659 * writing in the meantime.
1661 * @param cls closure (data itself)
1662 * @param size number of bytes available in buf
1663 * @param buf where the callee should write the message
1665 * @return number of bytes written to buf
1668 send_core_data_multicast (void *cls, size_t size, void *buf)
1670 struct MeshDataDescriptor *info = cls;
1671 struct GNUNET_MESH_Multicast *msg = buf;
1674 GNUNET_assert (NULL != info);
1675 GNUNET_assert (NULL != info->peer);
1676 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1677 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1679 if (total_size > size)
1682 struct GNUNET_PeerIdentity id;
1684 GNUNET_PEER_resolve(info->peer->id, &id);
1685 info->peer->infos[info->handler_n] = info;
1686 info->peer->types[info->handler_n] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1687 info->peer->core_transmit[info->handler_n] =
1688 GNUNET_CORE_notify_transmit_ready (core_handle,
1691 GNUNET_TIME_UNIT_FOREVER_REL,
1694 &send_core_data_multicast,
1698 info->peer->core_transmit[info->handler_n] = NULL;
1699 info->peer->infos[info->handler_n] = NULL;
1700 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1701 msg->header.size = htons (total_size);
1702 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1703 msg->tid = htonl (info->origin->tid);
1704 memcpy (&msg[1], info->data, info->size);
1705 if (0 == --(*info->copies))
1707 if (NULL != info->client)
1709 /* FIXME One unresponsive neighbor (who doesn't "call" tmt_rdy) can lock
1710 * the client from sending anything else to the service.
1711 * - Call receive_done after certain timeout.
1712 * - Here cancel the timeout.
1714 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1716 GNUNET_free (info->data);
1717 GNUNET_free (info->copies);
1725 * Function called to notify a client about the socket
1726 * being ready to queue more data. "buf" will be
1727 * NULL and "size" zero if the socket was closed for
1728 * writing in the meantime.
1730 * @param cls closure (MeshDataDescriptor)
1731 * @param size number of bytes available in buf
1732 * @param buf where the callee should write the message
1733 * @return number of bytes written to buf
1736 send_core_path_ack (void *cls, size_t size, void *buf)
1738 struct MeshDataDescriptor *info = cls;
1739 struct GNUNET_MESH_PathACK *msg = buf;
1741 GNUNET_assert (NULL != info);
1744 info->peer->core_transmit[info->handler_n] = NULL;
1746 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1751 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1752 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1753 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1754 msg->tid = htonl (info->origin->tid);
1755 msg->peer_id = my_full_id;
1757 /* TODO add signature */
1759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
1760 return sizeof (struct GNUNET_MESH_PathACK);
1765 * Function called to notify a client about the socket
1766 * being ready to queue more data. "buf" will be
1767 * NULL and "size" zero if the socket was closed for
1768 * writing in the meantime.
1770 * @param cls closure (data itself)
1771 * @param size number of bytes available in buf
1772 * @param buf where the callee should write the message
1773 * @return number of bytes written to buf
1776 send_core_data_raw (void *cls, size_t size, void *buf)
1778 struct GNUNET_MessageHeader *msg = cls;
1781 GNUNET_assert (NULL != msg);
1782 total_size = ntohs (msg->size);
1784 if (total_size > size)
1789 memcpy (buf, msg, total_size);
1797 * Send another peer a notification to destroy a tunnel
1798 * @param cls The tunnel to destroy
1799 * @param size Size in the buffer
1800 * @param buf Memory where to put the data to transmit
1801 * @return Size of data put in buffer
1804 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1806 struct MeshTunnel *t = cls;
1807 struct MeshClient *c;
1808 struct GNUNET_MESH_TunnelMessage *msg;
1812 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1813 /*FIXME*/ msg->header.size =
1814 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1815 msg->tunnel_id = htonl (t->id.tid);
1817 tunnel_destroy (c, t);
1818 return sizeof (struct GNUNET_MESH_TunnelMessage);
1823 /******************************************************************************/
1824 /******************** MESH NETWORK HANDLERS **************************/
1825 /******************************************************************************/
1829 * Core handler for path creation
1830 * struct GNUNET_CORE_MessageHandler
1832 * @param cls closure
1833 * @param message message
1834 * @param peer peer identity this notification is about
1835 * @param atsi performance data
1836 * @return GNUNET_OK to keep the connection open,
1837 * GNUNET_SYSERR to close it (signal serious error)
1841 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1842 const struct GNUNET_MessageHeader *message,
1843 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1845 unsigned int own_pos;
1848 MESH_TunnelNumber tid;
1849 struct GNUNET_MESH_ManipulatePath *msg;
1850 struct GNUNET_PeerIdentity *pi;
1851 GNUNET_HashCode hash;
1852 struct MeshPeerPath *path;
1853 struct MeshPeerInfo *dest_peer_info;
1854 struct MeshPeerInfo *orig_peer_info;
1855 struct MeshTunnel *t;
1857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1858 "MESH: Received a path create msg [%s]\n",
1859 GNUNET_i2s(&my_full_id));
1860 size = ntohs (message->size);
1861 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1863 GNUNET_break_op (0);
1867 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1868 if (size % sizeof (struct GNUNET_PeerIdentity))
1870 GNUNET_break_op (0);
1873 size /= sizeof (struct GNUNET_PeerIdentity);
1876 GNUNET_break_op (0);
1879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1880 "MESH: path has %u hops.\n",
1882 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1884 tid = ntohl (msg->tid);
1885 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1886 t = tunnel_get (pi, tid);
1887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1888 "MESH: path is for tunnel %s [%X].\n",
1893 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1894 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1895 t->id.oid = GNUNET_PEER_intern (pi);
1897 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1898 t->local_tid = next_local_tid++;
1899 /* FIXME test if taken */
1900 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
1901 t->tree = tree_new(t, t->id.oid);
1903 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1905 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1906 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1913 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1914 if (NULL == dest_peer_info)
1916 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1917 "MESH: Creating PeerInfo for destination.\n");
1918 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1919 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1920 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1922 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1924 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1925 if (NULL == orig_peer_info)
1927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1928 "MESH: Creating PeerInfo for origin.\n");
1929 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1930 orig_peer_info->id = GNUNET_PEER_intern (pi);
1931 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1932 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
1935 path = path_new (size);
1937 for (i = 0; i < size; i++)
1939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1940 "MESH: ... adding %s\n",
1941 GNUNET_i2s(&pi[i]));
1942 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1943 if (path->peers[i] == myid)
1946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1947 "MESH: Own position: %u\n", own_pos);
1950 /* cannot be self, must be 'not found' */
1951 /* create path: self not found in path through self */
1952 GNUNET_break_op (0);
1953 path_destroy (path);
1954 /* FIXME error. destroy tunnel? leave for timeout? */
1957 tunnel_add_path (t, path, own_pos);
1958 t->tree->me = tree_find_peer(t->tree->root, myid);
1959 if (own_pos == size - 1)
1961 /* It is for us! Send ack. */
1962 struct GNUNET_MESH_TunnelNotification cmsg;
1963 struct MeshDataDescriptor *info;
1966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1967 "MESH: It's for us!\n");
1968 path_add_to_origin (orig_peer_info, path);
1969 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1970 info->origin = &t->id;
1971 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1972 GNUNET_assert (NULL != info->peer);
1973 for (j = 0; info->peer->core_transmit[j]; j++)
1975 if (j == (CORE_QUEUE_SIZE - 1))
1981 info->handler_n = j;
1982 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
1983 info->peer->infos[j] = info;
1984 info->peer->core_transmit[j] =
1985 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1986 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1987 sizeof (struct GNUNET_MESH_PathACK),
1988 &send_core_path_ack, info);
1989 cmsg.header.size = htons(sizeof(cmsg));
1990 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1991 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
1992 cmsg.tunnel_id = htonl(t->local_tid);
1993 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
1997 struct MeshPeerPath *path2;
1999 /* It's for somebody else! Retransmit. */
2000 path2 = path_duplicate(path);
2001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2002 "MESH: Retransmitting.\n");
2003 path_add_to_peer(dest_peer_info, path);
2004 path = path_duplicate(path2);
2005 path_add_to_origin(orig_peer_info, path2);
2006 send_create_path(dest_peer_info, path, t);
2013 * Core handler for mesh network traffic going from the origin to a peer
2015 * @param cls closure
2016 * @param peer peer identity this notification is about
2017 * @param message message
2018 * @param atsi performance data
2019 * @return GNUNET_OK to keep the connection open,
2020 * GNUNET_SYSERR to close it (signal serious error)
2023 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2024 const struct GNUNET_MessageHeader *message,
2025 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2027 struct GNUNET_MESH_Unicast *msg;
2028 struct MeshTunnel *t;
2029 struct MeshPeerInfo *pi;
2032 size = ntohs (message->size);
2034 sizeof (struct GNUNET_MESH_Unicast) +
2035 sizeof (struct GNUNET_MessageHeader))
2040 msg = (struct GNUNET_MESH_Unicast *) message;
2041 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2044 /* TODO notify back: we don't know this tunnel */
2045 GNUNET_break_op (0);
2048 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2049 &msg->destination.hashPubKey);
2052 /* TODO maybe feedback, log to statistics */
2053 GNUNET_break_op (0);
2058 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2061 msg = GNUNET_malloc (size);
2062 memcpy (msg, message, size);
2063 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2064 GNUNET_TIME_UNIT_FOREVER_REL,
2065 path_get_first_hop (t->tree, pi->id),
2067 &send_core_data_raw, msg);
2073 * Core handler for mesh network traffic going from the origin to all peers
2075 * @param cls closure
2076 * @param message message
2077 * @param peer peer identity this notification is about
2078 * @param atsi performance data
2079 * @return GNUNET_OK to keep the connection open,
2080 * GNUNET_SYSERR to close it (signal serious error)
2082 * TODO: Check who we got this from, to validate route.
2085 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2086 const struct GNUNET_MessageHeader *message,
2087 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2089 struct GNUNET_MESH_Multicast *msg;
2090 struct GNUNET_PeerIdentity *id;
2091 struct MeshDataDescriptor *info;
2092 struct MeshTunnelTreeNode *n;
2093 struct MeshTunnel *t;
2094 unsigned int *copies;
2099 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Multicast);
2100 if (size < sizeof (struct GNUNET_MessageHeader))
2102 GNUNET_break_op (0);
2105 msg = (struct GNUNET_MESH_Multicast *) message;
2106 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2110 /* TODO notify that we dont know that tunnel */
2111 GNUNET_break_op (0);
2115 /* Transmit to locally interested clients */
2116 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2118 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2120 n = t->tree->me->children_head;
2123 copies = GNUNET_malloc (sizeof (unsigned int));
2124 for (*copies = 0; NULL != n; n = n->next)
2126 n = t->tree->me->children_head;
2127 data = GNUNET_malloc (size);
2128 memcpy (data, &msg[1], size);
2131 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2132 info->origin = &t->id;
2135 info->copies = copies;
2136 info->client = t->client->handle;
2137 info->destination = n->peer;
2138 id = path_get_first_hop(t->tree, n->peer);
2139 info->peer = peer_info_get(id);
2140 GNUNET_assert (NULL != info->peer);
2141 for (i = 0; NULL != info->peer->core_transmit[i]; i++)
2143 if (i == (CORE_QUEUE_SIZE - 1))
2149 info->handler_n = i;
2150 info->peer->infos[i] = info;
2151 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2152 info->peer->core_transmit[i] =
2153 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2154 GNUNET_TIME_UNIT_FOREVER_REL, id,
2155 ntohs (msg->header.size),
2156 &send_core_data_multicast, info);
2164 * Core handler for mesh network traffic
2166 * @param cls closure
2167 * @param message message
2168 * @param peer peer identity this notification is about
2169 * @param atsi performance data
2171 * @return GNUNET_OK to keep the connection open,
2172 * GNUNET_SYSERR to close it (signal serious error)
2175 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2176 const struct GNUNET_MessageHeader *message,
2177 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2179 struct GNUNET_MESH_ToOrigin *msg;
2180 struct GNUNET_PeerIdentity id;
2181 struct MeshPeerInfo *peer_info;
2182 struct MeshTunnel *t;
2185 size = ntohs (message->size);
2186 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2187 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2189 GNUNET_break_op (0);
2192 msg = (struct GNUNET_MESH_ToOrigin *) message;
2193 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2197 /* TODO notify that we dont know this tunnel (whom)? */
2201 if (t->id.oid == myid)
2203 if (NULL == t->client)
2205 /* got data packet for ownerless tunnel */
2206 GNUNET_break_op (0);
2209 /* TODO signature verification */
2210 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
2214 peer_info = peer_info_get (&msg->oid);
2215 if (NULL == peer_info)
2217 /* unknown origin of tunnel */
2221 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2222 msg = GNUNET_malloc (size);
2223 memcpy (msg, message, size);
2224 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2225 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2226 &send_core_data_raw, msg);
2233 * Core handler for path ACKs
2235 * @param cls closure
2236 * @param message message
2237 * @param peer peer identity this notification is about
2238 * @param atsi performance data
2240 * @return GNUNET_OK to keep the connection open,
2241 * GNUNET_SYSERR to close it (signal serious error)
2244 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2245 const struct GNUNET_MessageHeader *message,
2246 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2248 struct GNUNET_MESH_PathACK *msg;
2249 struct GNUNET_PeerIdentity id;
2250 struct MeshTunnelTreeNode *n;
2251 struct MeshPeerInfo *peer_info;
2252 struct MeshTunnel *t;
2254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2255 "MESH: Received a path ACK msg [%s]\n",
2256 GNUNET_i2s(&my_full_id));
2257 msg = (struct GNUNET_MESH_PathACK *) message;
2258 t = tunnel_get (&msg->oid, msg->tid);
2261 /* TODO notify that we don't know the tunnel */
2265 /* Message for us? */
2266 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2269 "MESH: It's for us!\n");
2270 if (NULL == t->client)
2272 GNUNET_break_op (0);
2275 peer_info = peer_info_get (&msg->peer_id);
2276 if (NULL == peer_info)
2278 GNUNET_break_op (0);
2281 n = tree_find_peer(t->tree->root, peer_info->id);
2284 GNUNET_break_op (0);
2287 n->status = MESH_PEER_READY;
2288 send_client_peer_connected(t, peer_info->id);
2292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2293 "MESH: not for us, retransmitting...\n");
2294 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2295 peer_info = peer_info_get (&msg->oid);
2296 if (NULL == peer_info)
2298 /* If we know the tunnel, we should DEFINITELY know the peer */
2302 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2303 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2304 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2305 GNUNET_TIME_UNIT_FOREVER_REL,
2307 sizeof (struct GNUNET_MESH_PathACK),
2308 &send_core_data_raw, msg);
2314 * Functions to handle messages from core
2316 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2317 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2318 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2319 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2320 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2321 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2322 sizeof (struct GNUNET_MESH_PathACK)},
2328 /******************************************************************************/
2329 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2330 /******************************************************************************/
2333 * deregister_app: iterator for removing each application registered by a client
2335 * @param cls closure
2336 * @param key the hash of the application id (used to access the hashmap)
2337 * @param value the value stored at the key (client)
2339 * @return GNUNET_OK on success
2342 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2344 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2350 * notify_client_connection_failure: notify a client that the connection to the
2351 * requested remote peer is not possible (for instance, no route found)
2352 * Function called when the socket is ready to queue more data. "buf" will be
2353 * NULL and "size" zero if the socket was closed for writing in the meantime.
2355 * @param cls closure
2356 * @param size number of bytes available in buf
2357 * @param buf where the callee should write the message
2358 * @return number of bytes written to buf
2361 notify_client_connection_failure (void *cls, size_t size, void *buf)
2364 struct MeshPeerInfo *peer_info;
2365 struct GNUNET_MESH_PeerControl *msg;
2366 struct GNUNET_PeerIdentity id;
2368 if (0 == size && NULL == buf)
2370 // TODO retry? cancel?
2374 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2375 peer_info = (struct MeshPeerInfo *) cls;
2376 msg = (struct GNUNET_MESH_PeerControl *) buf;
2377 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2378 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2379 // msg->tunnel_id = htonl(peer_info->t->tid);
2380 GNUNET_PEER_resolve (peer_info->id, &id);
2381 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2389 * Send keepalive packets for a peer
2391 * @param cls Closure (tunnel for which to send the keepalive).
2392 * @param tc Notification context.
2394 * TODO: implement explicit multicast keepalive?
2397 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2399 struct MeshTunnel *t = cls;
2400 struct GNUNET_MessageHeader *payload;
2401 struct GNUNET_MESH_Multicast *msg;
2404 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2405 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2411 "MESH: sending keepalive for tunnel %d\n",
2414 size = sizeof(struct GNUNET_MESH_Multicast) +
2415 sizeof(struct GNUNET_MessageHeader);
2416 msg = GNUNET_malloc (size);
2417 msg->header.size = htons (size);
2418 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2419 msg->oid = my_full_id;
2420 msg->tid = htonl(t->id.tid);
2421 payload = (struct GNUNET_MessageHeader *) &msg[1];
2422 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2423 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2424 handle_mesh_data_multicast (NULL, &my_full_id, &msg->header, NULL);
2427 t->path_refresh_task =
2428 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
2434 * Function to process paths received for a new peer addition. The recorded
2435 * paths form the initial tunnel, which can be optimized later.
2436 * Called on each result obtained for the DHT search.
2438 * @param cls closure
2439 * @param exp when will this value expire
2440 * @param key key of the result
2441 * @param type type of the result
2442 * @param size number of bytes in data
2443 * @param data pointer to the result data
2445 * TODO: re-issue the request after certain time? cancel after X results?
2448 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2449 const GNUNET_HashCode * key,
2450 const struct GNUNET_PeerIdentity *get_path,
2451 unsigned int get_path_length,
2452 const struct GNUNET_PeerIdentity *put_path,
2453 unsigned int put_path_length,
2454 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2456 struct MeshPathInfo *path_info = cls;
2457 struct MeshPeerPath *p;
2458 struct GNUNET_PeerIdentity pi;
2461 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2462 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2463 "MESH: Got results from DHT for %s\n",
2464 GNUNET_h2s_full(&pi.hashPubKey));
2465 GNUNET_DHT_get_stop(path_info->peer->dhtget);
2466 path_info->peer->dhtget = NULL;
2468 p = path_build_from_dht (get_path, get_path_length,
2469 put_path, put_path_length);
2470 path_add_to_peer (path_info->peer, p);
2471 for (i = 0; i < path_info->peer->ntunnels; i++)
2473 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2474 peer_info_connect(path_info->peer, path_info->t);
2476 GNUNET_free (path_info);
2483 * Function to process paths received for a new peer addition. The recorded
2484 * paths form the initial tunnel, which can be optimized later.
2485 * Called on each result obtained for the DHT search.
2487 * @param cls closure
2488 * @param exp when will this value expire
2489 * @param key key of the result
2490 * @param type type of the result
2491 * @param size number of bytes in data
2492 * @param data pointer to the result data
2495 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2496 const GNUNET_HashCode * key,
2497 const struct GNUNET_PeerIdentity *get_path,
2498 unsigned int get_path_length,
2499 const struct GNUNET_PeerIdentity *put_path,
2500 unsigned int put_path_length,
2501 enum GNUNET_BLOCK_Type type, size_t size,
2504 const struct GNUNET_PeerIdentity *pi = data;
2505 struct GNUNET_PeerIdentity id;
2506 struct MeshTunnel *t = cls;
2507 struct MeshPeerInfo *peer_info;
2508 struct MeshPathInfo *path_info;
2509 struct MeshPeerPath *p;
2512 if (size != sizeof (struct GNUNET_PeerIdentity))
2514 GNUNET_break_op (0);
2517 GNUNET_assert (NULL != t->client);
2518 GNUNET_DHT_get_stop (t->dht_get_type);
2519 t->dht_get_type = NULL;
2520 peer_info = peer_info_get (pi);
2521 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2522 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2524 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2525 NULL == peer_info->dhtget)
2527 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2528 path_info->peer = peer_info;
2530 /* we don't have a route to the peer, let's try a direct lookup */
2532 GNUNET_DHT_get_start (dht_handle, /* handle */
2533 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2534 GNUNET_BLOCK_TYPE_TEST, /* block type */
2535 &pi->hashPubKey, /* key to look up */
2536 10U, /* replication level */
2537 GNUNET_DHT_RO_RECORD_ROUTE |
2538 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2539 /* option to dht: record route */
2541 0, /* xquery bits */
2542 dht_get_id_handler, /* callback */
2543 path_info); /* closure */
2547 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2548 path_add_to_peer (peer_info, p);
2549 tunnel_add_peer(t, peer_info);
2550 p = tree_get_path_to_peer(t->tree, peer_info->id);
2552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2553 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2554 t->local_tid, p->length);
2555 for (i = 0; i < p->length; i++)
2557 GNUNET_PEER_resolve (p->peers[0], &id);
2558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2559 GNUNET_h2s_full (&id.hashPubKey));
2565 send_create_path(peer_info, p, t);
2569 send_client_peer_connected(t, myid);
2573 /******************************************************************************/
2574 /********************* MESH LOCAL HANDLES **************************/
2575 /******************************************************************************/
2579 * Handler for client disconnection
2581 * @param cls closure
2582 * @param client identification of the client; NULL
2583 * for the last call when the server is destroyed
2586 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2588 struct MeshClient *c;
2589 struct MeshClient *next;
2591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2597 if (c->handle != client && NULL != client)
2599 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2604 if (NULL != c->tunnels)
2606 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2607 &tunnel_destroy_iterator,
2609 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2612 /* deregister clients applications */
2613 if (NULL != c->apps)
2615 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2616 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2618 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2619 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2621 GNUNET_SCHEDULER_cancel (announce_applications_task);
2622 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2624 if (NULL != c->types)
2625 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2626 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2638 * Handler for new clients
2640 * @param cls closure
2641 * @param client identification of the client
2642 * @param message the actual message, which includes messages the client wants
2645 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2646 const struct GNUNET_MessageHeader *message)
2648 struct GNUNET_MESH_ClientConnect *cc_msg;
2649 struct MeshClient *c;
2650 GNUNET_MESH_ApplicationType *a;
2657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2658 /* Check data sanity */
2659 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2660 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2661 ntypes = ntohs (cc_msg->types);
2662 napps = ntohs (cc_msg->applications);
2664 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2667 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2671 /* Create new client structure */
2672 c = GNUNET_malloc (sizeof (struct MeshClient));
2674 c->id = next_client_id++;
2677 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2680 GNUNET_MESH_ApplicationType at;
2683 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2684 for (i = 0; i < napps; i++)
2687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2688 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2689 /* store in clients hashmap */
2690 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2691 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2692 /* store in global hashmap, for announcements */
2693 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2694 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2696 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2697 announce_applications_task =
2698 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2706 t = (uint16_t *) & a[napps];
2707 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2708 for (i = 0; i < ntypes; i++)
2711 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2713 /* store in clients hashmap */
2714 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2715 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2716 /* store in global hashmap */
2717 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2718 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2722 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2724 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2725 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2726 GNUNET_SERVER_notification_context_add (nc, client);
2728 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2736 * Handler for requests of new tunnels
2738 * @param cls closure
2739 * @param client identification of the client
2740 * @param message the actual message
2743 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2744 const struct GNUNET_MessageHeader *message)
2746 struct GNUNET_MESH_TunnelMessage *t_msg;
2747 struct MeshTunnel *t;
2748 struct MeshClient *c;
2749 GNUNET_HashCode hash;
2751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2753 /* Sanity check for client registration */
2754 if (NULL == (c = client_get (client)))
2757 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2761 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2764 /* Message sanity check */
2765 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2768 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2772 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2773 /* Sanity check for tunnel numbering */
2774 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2777 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2780 /* Sanity check for duplicate tunnel IDs */
2781 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2784 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2788 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2790 while (NULL != tunnel_get_by_pi (myid, next_tid))
2791 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2792 t->id.tid = next_tid++;
2794 t->local_tid = ntohl (t_msg->tunnel_id);
2796 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2798 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2800 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2801 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2804 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2808 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2810 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2811 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2814 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2817 t->tree = tree_new (t, myid);
2818 t->tree->refresh = REFRESH_PATH_TIME;
2819 t->tree->root->status = MESH_PEER_READY;
2820 t->tree->me = t->tree->root;
2822 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2828 * Handler for requests of deleting tunnels
2830 * @param cls closure
2831 * @param client identification of the client
2832 * @param message the actual message
2835 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2836 const struct GNUNET_MessageHeader *message)
2838 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2839 struct MeshClient *c;
2840 struct MeshTunnel *t;
2841 MESH_TunnelNumber tid;
2842 GNUNET_HashCode hash;
2844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2846 /* Sanity check for client registration */
2847 if (NULL == (c = client_get (client)))
2850 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2853 /* Message sanity check */
2854 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2857 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2863 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2865 /* Retrieve tunnel */
2866 tid = ntohl (tunnel_msg->tunnel_id);
2868 /* Remove from local id hashmap */
2869 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2870 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2871 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2873 /* Remove from global id hashmap */
2874 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2875 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2877 // notify_tunnel_destroy(t); FIXME
2879 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2885 * Handler for connection requests to new peers
2887 * @param cls closure
2888 * @param client identification of the client
2889 * @param message the actual message (PeerControl)
2892 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2893 const struct GNUNET_MessageHeader *message)
2895 struct GNUNET_MESH_PeerControl *peer_msg;
2896 struct MeshPeerInfo *peer_info;
2897 struct MeshClient *c;
2898 struct MeshTunnel *t;
2899 MESH_TunnelNumber tid;
2901 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
2902 /* Sanity check for client registration */
2903 if (NULL == (c = client_get (client)))
2906 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2910 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2911 /* Sanity check for message size */
2912 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2915 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2919 /* Tunnel exists? */
2920 tid = ntohl (peer_msg->tunnel_id);
2921 t = tunnel_get_by_local_id (c, tid);
2925 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2929 /* Does client own tunnel? */
2930 if (t->client->handle != client)
2933 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2936 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
2937 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
2938 peer_info = peer_info_get (&peer_msg->peer);
2940 tunnel_add_peer(t, peer_info);
2941 peer_info_connect(peer_info, t);
2943 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2949 * Handler for disconnection requests of peers in a tunnel
2951 * @param cls closure
2952 * @param client identification of the client
2953 * @param message the actual message (PeerControl)
2956 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2957 const struct GNUNET_MessageHeader *message)
2959 struct GNUNET_MESH_PeerControl *peer_msg;
2960 struct MeshClient *c;
2961 struct MeshTunnel *t;
2962 MESH_TunnelNumber tid;
2964 /* Sanity check for client registration */
2965 if (NULL == (c = client_get (client)))
2968 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2971 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2972 /* Sanity check for message size */
2973 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2976 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2980 /* Tunnel exists? */
2981 tid = ntohl (peer_msg->tunnel_id);
2982 t = tunnel_get_by_local_id (c, tid);
2986 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2990 /* Does client own tunnel? */
2991 if (t->client->handle != client)
2994 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2998 /* Ok, delete peer from tunnel */
2999 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3000 &peer_msg->peer.hashPubKey);
3002 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3008 * Handler for connection requests to new peers by type
3010 * @param cls closure
3011 * @param client identification of the client
3012 * @param message the actual message (ConnectPeerByType)
3015 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3016 const struct GNUNET_MessageHeader *message)
3018 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3019 struct MeshClient *c;
3020 struct MeshTunnel *t;
3021 GNUNET_HashCode hash;
3022 MESH_TunnelNumber tid;
3024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3025 /* Sanity check for client registration */
3026 if (NULL == (c = client_get (client)))
3029 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3033 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3034 /* Sanity check for message size */
3035 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3036 ntohs (connect_msg->header.size))
3039 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3043 /* Tunnel exists? */
3044 tid = ntohl (connect_msg->tunnel_id);
3045 t = tunnel_get_by_local_id (c, tid);
3049 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3053 /* Does client own tunnel? */
3054 if (t->client->handle != client)
3057 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3061 /* Do WE have the service? */
3062 t->type = ntohl (connect_msg->type);
3063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3064 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3065 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3068 /* Yes! Fast forward, add ourselves to the tunnel and send the
3069 * good news to the client
3071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3072 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3073 peer_info_get (&my_full_id),
3074 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3077 send_client_peer_connected(t, myid);
3078 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3079 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3082 /* Ok, lets find a peer offering the service */
3083 if (NULL != t->dht_get_type)
3085 GNUNET_DHT_get_stop (t->dht_get_type);
3087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3088 GNUNET_h2s_full (&hash));
3090 GNUNET_DHT_get_start (dht_handle,
3091 GNUNET_TIME_UNIT_FOREVER_REL,
3092 GNUNET_BLOCK_TYPE_TEST,
3095 GNUNET_DHT_RO_RECORD_ROUTE |
3096 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3098 &dht_get_type_handler, t);
3100 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3106 * Handler for client traffic directed to one peer
3108 * @param cls closure
3109 * @param client identification of the client
3110 * @param message the actual message
3113 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3114 const struct GNUNET_MessageHeader *message)
3116 struct MeshClient *c;
3117 struct MeshTunnel *t;
3118 struct MeshPeerInfo *pi;
3119 struct GNUNET_MESH_Unicast *data_msg;
3120 MESH_TunnelNumber tid;
3123 /* Sanity check for client registration */
3124 if (NULL == (c = client_get (client)))
3127 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3130 data_msg = (struct GNUNET_MESH_Unicast *) message;
3131 /* Sanity check for message size */
3132 size = ntohs (message->size);
3133 if (sizeof (struct GNUNET_MESH_Unicast) +
3134 sizeof (struct GNUNET_MessageHeader) > size)
3137 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3141 /* Tunnel exists? */
3142 tid = ntohl (data_msg->tid);
3143 t = tunnel_get_by_local_id (c, tid);
3147 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3151 /* Is it a local tunnel? Then, does client own the tunnel? */
3152 if (t->client->handle != NULL && t->client->handle != client)
3155 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3159 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3160 &data_msg->destination.hashPubKey);
3161 /* Is the selected peer in the tunnel? */
3165 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3169 /* Ok, everything is correct, send the message
3170 * (pretend we got it from a mesh peer)
3173 char buf[ntohs (message->size)];
3174 struct GNUNET_MESH_Unicast *copy;
3176 /* Work around const limitation */
3177 copy = (struct GNUNET_MESH_Unicast *) buf;
3178 memcpy (buf, data_msg, size);
3179 copy->oid = my_full_id;
3180 copy->tid = htonl (t->id.tid);
3181 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL);
3183 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3188 * Handler for client traffic directed to all peers in a tunnel
3190 * @param cls closure
3191 * @param client identification of the client
3192 * @param message the actual message
3195 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3196 const struct GNUNET_MessageHeader *message)
3198 struct MeshClient *c;
3199 struct MeshTunnel *t;
3200 struct GNUNET_MESH_Multicast *data_msg;
3201 MESH_TunnelNumber tid;
3203 /* Sanity check for client registration */
3204 if (NULL == (c = client_get (client)))
3207 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3210 data_msg = (struct GNUNET_MESH_Multicast *) message;
3211 /* Sanity check for message size */
3212 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3215 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3219 /* Tunnel exists? */
3220 tid = ntohl (data_msg->tid);
3221 t = tunnel_get_by_local_id (c, tid);
3225 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3229 /* Does client own tunnel? */
3230 if (t->client->handle != client)
3233 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3238 char buf[ntohs(message->size)];
3239 struct GNUNET_MESH_Multicast *copy;
3241 copy = (struct GNUNET_MESH_Multicast *)buf;
3242 memcpy(buf, message, ntohs(message->size));
3243 copy->oid = my_full_id;
3244 copy->tid = htonl(t->id.tid);
3245 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL);
3248 /* receive done gets called when last copy is sent */
3253 * Functions to handle messages from clients
3255 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3256 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3257 {&handle_local_tunnel_create, NULL,
3258 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3259 sizeof (struct GNUNET_MESH_TunnelMessage)},
3260 {&handle_local_tunnel_destroy, NULL,
3261 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3262 sizeof (struct GNUNET_MESH_TunnelMessage)},
3263 {&handle_local_connect_add, NULL,
3264 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3265 sizeof (struct GNUNET_MESH_PeerControl)},
3266 {&handle_local_connect_del, NULL,
3267 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3268 sizeof (struct GNUNET_MESH_PeerControl)},
3269 {&handle_local_connect_by_type, NULL,
3270 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3271 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3272 {&handle_local_unicast, NULL,
3273 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3274 {&handle_local_unicast, NULL,
3275 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3276 {&handle_local_multicast, NULL,
3277 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3283 * To be called on core init/fail.
3285 * @param cls service closure
3286 * @param server handle to the server for this service
3287 * @param identity the public identity of this peer
3290 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3291 const struct GNUNET_PeerIdentity *identity)
3293 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3294 core_handle = server;
3295 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3297 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3298 GNUNET_SCHEDULER_shutdown();
3304 * Method called whenever a given peer connects.
3306 * @param cls closure
3307 * @param peer peer identity this notification is about
3308 * @param atsi performance data for the connection
3311 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3312 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3314 struct MeshPeerInfo *peer_info;
3315 struct MeshPeerPath *path;
3317 #if MESH_DEBUG_CONNECTION
3318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3320 GNUNET_h2s(&my_full_id.hashPubKey));
3322 peer_info = peer_info_get (peer);
3323 if (myid == peer_info->id)
3325 #if MESH_DEBUG_CONNECTION
3326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3330 #if MESH_DEBUG_CONNECTION
3333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3334 GNUNET_h2s(&peer->hashPubKey));
3337 path = path_new (2);
3338 path->peers[0] = myid;
3339 path->peers[1] = peer_info->id;
3340 GNUNET_PEER_change_rc(myid, 1);
3341 GNUNET_PEER_change_rc(peer_info->id, 1);
3342 path_add_to_peer (peer_info, path);
3347 * Method called whenever a peer disconnects.
3349 * @param cls closure
3350 * @param peer peer identity this notification is about
3353 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3355 struct MeshPeerInfo *pi;
3358 #if MESH_DEBUG_CONNECTION
3359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3361 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3367 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3369 peer_info_cancel_transmission(pi, i);
3371 path_remove_from_peer (pi, pi->id, myid);
3372 #if MESH_DEBUG_CONNECTION
3375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3382 /******************************************************************************/
3383 /************************ MAIN FUNCTIONS ****************************/
3384 /******************************************************************************/
3387 * Iterator over hash map entries.
3389 * @param cls closure
3390 * @param key current key code
3391 * @param value value in the hash map
3392 * @return GNUNET_YES if we should continue to
3397 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
3399 struct MeshTunnel *t = value;
3405 * Task run during shutdown.
3411 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3414 /* TODO: destroy tunnels? */
3415 if (core_handle != NULL)
3417 GNUNET_CORE_disconnect (core_handle);
3420 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
3421 if (dht_handle != NULL)
3423 GNUNET_DHT_disconnect (dht_handle);
3428 GNUNET_SERVER_notification_context_destroy (nc);
3431 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3433 GNUNET_SCHEDULER_cancel (announce_id_task);
3434 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3440 * Process mesh requests.
3442 * @param cls closure
3443 * @param server the initialized server
3444 * @param c configuration to use
3447 run (void *cls, struct GNUNET_SERVER_Handle *server,
3448 const struct GNUNET_CONFIGURATION_Handle *c)
3450 struct MeshPeerInfo *peer;
3451 struct MeshPeerPath *p;
3454 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3455 server_handle = server;
3456 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3457 CORE_QUEUE_SIZE, /* queue size */
3458 NULL, /* Closure passed to MESH functions */
3459 &core_init, /* Call core_init once connected */
3460 &core_connect, /* Handle connects */
3461 &core_disconnect, /* remove peers on disconnects */
3462 NULL, /* Don't notify about all incoming messages */
3463 GNUNET_NO, /* For header only in notification */
3464 NULL, /* Don't notify about all outbound messages */
3465 GNUNET_NO, /* For header-only out notification */
3466 core_handlers); /* Register these handlers */
3467 if (core_handle == NULL)
3470 GNUNET_SCHEDULER_shutdown ();
3475 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3478 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3480 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3481 GNUNET_SCHEDULER_shutdown ();
3484 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3485 GNUNET_free (keyfile);
3486 if (my_private_key == NULL)
3488 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3489 _("Mesh service could not access hostkey. Exiting.\n"));
3490 GNUNET_SCHEDULER_shutdown ();
3493 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3494 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3495 &my_full_id.hashPubKey);
3496 myid = GNUNET_PEER_intern (&my_full_id);
3498 dht_handle = GNUNET_DHT_connect (c, 64);
3499 if (dht_handle == NULL)
3505 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3507 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3508 peers = GNUNET_CONTAINER_multihashmap_create (32);
3509 applications = GNUNET_CONTAINER_multihashmap_create (32);
3510 types = GNUNET_CONTAINER_multihashmap_create (32);
3512 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3513 nc = GNUNET_SERVER_notification_context_create (server_handle,
3515 GNUNET_SERVER_disconnect_notify (server_handle,
3516 &handle_local_client_disconnect,
3521 clients_tail = NULL;
3526 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3527 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3529 /* Create a peer_info for the local peer */
3530 peer = peer_info_get(&my_full_id);
3533 path_add_to_peer(peer, p);
3535 /* Scheduled the task to clean up when shutdown is called */
3536 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3543 * The main function for the mesh service.
3545 * @param argc number of arguments from the command line
3546 * @param argv command line arguments
3547 * @return 0 ok, 1 on error
3550 main (int argc, char *const *argv)
3555 // fprintf (stderr, "main ()\n");
3557 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3560 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3562 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3564 // fprintf (stderr, "main () END\n");