2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - 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)
880 GNUNET_PEER_resolve(p->peers[i + 1], &id);
882 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
884 path_info->peer = peer;
886 neighbor = peer_info_get(&id);
887 path_info->pos = peer_info_transmit_slot(neighbor);
888 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
889 neighbor->infos[path_info->pos] = path_info;
890 neighbor->core_transmit[path_info->pos] =
891 GNUNET_CORE_notify_transmit_ready (
892 core_handle, /* handle */
895 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
897 sizeof (struct GNUNET_MESH_ManipulatePath)
898 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
899 &send_core_create_path, /* callback */
900 path_info); /* cls */
905 * Try to establish a new connection to this peer.
906 * Use the best path for the given tunnel.
907 * If the peer doesn't have any path to it yet, try to get one.
908 * If the peer already has some path, send a CREATE PATH towards it.
910 * @param peer PeerInfo of the peer.
911 * @param t Tunnel for which to create the path, if possible.
914 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
916 struct MeshPeerPath *p;
917 struct MeshPathInfo *path_info;
919 if (NULL != peer->path_head)
921 p = tree_get_path_to_peer(t->tree, peer->id);
924 send_create_path(peer, p, t);
929 send_client_peer_connected(t, myid);
932 else if (NULL == peer->dhtget)
934 struct GNUNET_PeerIdentity id;
936 GNUNET_PEER_resolve(peer->id, &id);
937 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
938 path_info->peer = peer;
941 GNUNET_DHT_get_start(dht_handle, /* handle */
942 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
943 GNUNET_BLOCK_TYPE_TEST, /* type */
944 &id.hashPubKey, /* key to search */
945 4, /* replication level */
946 GNUNET_DHT_RO_RECORD_ROUTE |
947 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
953 /* Otherwise, there is no path but the DHT get is already started. */
959 * Destroy the peer_info and free any allocated resources linked to it
960 * @param t tunnel the path belongs to
961 * @param pi the peer_info to destroy
962 * @return GNUNET_OK on success
965 peer_info_destroy (struct MeshPeerInfo *pi)
967 GNUNET_HashCode hash;
968 struct GNUNET_PeerIdentity id;
970 GNUNET_PEER_resolve (pi->id, &id);
971 GNUNET_PEER_change_rc (pi->id, -1);
972 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
974 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
975 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
983 * Notify a tunnel that a connection has broken that affects at least
986 * @param t Tunnel affected.
987 * @param peer Peer that (at least) has been affected by the disconnection.
988 * @param p1 Peer that got disconnected from p2.
989 * @param p2 Peer that got disconnected from p1.
991 * @return Short ID of the peer disconnected (either p1 or p2).
992 * 0 if the tunnel remained unaffected.
994 static GNUNET_PEER_Id
995 tunnel_notify_connection_broken (struct MeshTunnel *t,
996 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1000 * Remove all paths that rely on a direct connection between p1 and p2
1001 * from the peer itself and notify all tunnels about it.
1003 * @param peer PeerInfo of affected peer.
1004 * @param p1 GNUNET_PEER_Id of one peer.
1005 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1008 * TODO: optimize (see below)
1011 path_remove_from_peer (struct MeshPeerInfo *peer,
1015 struct GNUNET_PeerIdentity id;
1016 struct MeshPeerPath *p;
1017 struct MeshPeerPath *aux;
1018 struct MeshPeerInfo *peer_d;
1020 unsigned int destroyed;
1026 p = peer->path_head;
1030 for (i = 0; i < (p->length - 1); i++)
1032 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1033 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1045 for (i = 0; i < peer->ntunnels; i++)
1047 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
1049 * Problem: one or more peers have been deleted from the tunnel tree.
1050 * We don't know who they are to try to add them again.
1051 * We need to try to find a new path for each of the disconnected peers.
1052 * Some of them might already have a path to reach them that does not
1053 * involve p1 and p2. Adding all anew might render in a better tree than
1054 * the trivial immediate fix.
1056 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1057 * its children will be reachable trough him.
1059 peer_d = peer_info_get_short(d);
1062 for (p = peer_d->path_head; NULL != p; p = p->next)
1064 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1072 /* No callback, as peer will be already disconnected */
1073 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1077 struct MeshPathInfo *path_info;
1079 if (NULL != peer_d->dhtget)
1081 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1082 path_info->path = p;
1083 path_info->peer = peer_d;
1084 path_info->t = peer->tunnels[i];
1086 GNUNET_DHT_get_start(dht_handle, /* handle */
1087 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1088 GNUNET_BLOCK_TYPE_TEST, /* type */
1089 &id.hashPubKey, /*key to search */
1090 4, /* replication level */
1091 GNUNET_DHT_RO_RECORD_ROUTE |
1092 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1094 0, /* xquery bits */
1095 &dht_get_id_handler,
1096 (void *) path_info);
1103 * Add the path to the peer and update the path used to reach it in case this
1106 * @param peer_info Destination peer to add the path to.
1107 * @param path New path to add. Last peer must be the peer in arg 1.
1108 * Path will be either used of freed if already known.
1110 * TODO: trim the part from origin to us? Add it as path to origin?
1113 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1115 struct MeshPeerPath *aux;
1119 if (NULL == peer_info || NULL == path)
1125 l = path_get_length (path);
1132 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1134 l2 = path_get_length (aux);
1137 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1138 peer_info->path_tail, aux, path);
1142 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1149 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1156 * Add the path to the origin peer and update the path used to reach it in case
1157 * this is the shortest.
1158 * The path is given in peer_info -> destination, therefore we turn the path
1159 * upside down first.
1161 * @param peer_info Peer to add the path to, being the origin of the path.
1162 * @param path New path to add after being inversed.
1165 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1168 path_add_to_peer (peer_info, path);
1173 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1174 * to obtain a local peer -> destination path and interning the peer ids.
1176 * @return Newly allocated and created path
1178 static struct MeshPeerPath *
1179 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1180 unsigned int get_path_length,
1181 const struct GNUNET_PeerIdentity *put_path,
1182 unsigned int put_path_length)
1184 struct MeshPeerPath *p;
1190 GNUNET_PEER_change_rc(myid, 1);
1191 i = get_path_length;
1192 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1193 for (i--; i >= 0; i--)
1195 id = GNUNET_PEER_intern (&get_path[i]);
1196 if (p->length > 0 && id == p->peers[p->length - 1])
1198 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1199 GNUNET_PEER_change_rc(id, -1);
1203 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1204 "MESH: Adding from GET: %s.\n",
1205 GNUNET_i2s(&get_path[i]));
1207 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1208 p->peers[p->length - 1] = id;
1211 i = put_path_length;
1212 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1213 for (i--; i >= 0; i--)
1215 id = GNUNET_PEER_intern (&put_path[i]);
1218 /* PUT path went through us, so discard the path up until now and start
1219 * from here to get a much shorter (and loop-free) path.
1224 if (p->length > 0 && id == p->peers[p->length - 1])
1226 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1227 GNUNET_PEER_change_rc(id, -1);
1231 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1232 "MESH: Adding from PUT: %s.\n",
1233 GNUNET_i2s(&put_path[i]));
1235 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1236 p->peers[p->length - 1] = id;
1240 if (get_path_length > 0)
1241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1242 "MESH: (first of GET: %s)\n",
1243 GNUNET_h2s_full(&get_path[0].hashPubKey));
1244 if (put_path_length > 0)
1245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1246 "MESH: (first of PUT: %s)\n",
1247 GNUNET_h2s_full(&put_path[0].hashPubKey));
1248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1249 "MESH: In total: %d hops\n",
1251 for (i = 0; i < p->length; i++)
1253 struct GNUNET_PeerIdentity peer_id;
1255 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1256 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1259 GNUNET_h2s_full(&peer_id.hashPubKey));
1267 * Send keepalive packets for a peer
1269 * @param cls Closure (tunnel for which to send the keepalive).
1270 * @param tc Notification context.
1272 * TODO: implement explicit multicast keepalive?
1275 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1279 * Search for a tunnel among the tunnels for a client
1281 * @param c the client whose tunnels to search in
1282 * @param tid the local id of the tunnel
1284 * @return tunnel handler, NULL if doesn't exist
1286 static struct MeshTunnel *
1287 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1289 GNUNET_HashCode hash;
1291 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1292 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1297 * Search for a tunnel by global ID using PEER_ID
1299 * @param pi owner of the tunnel
1300 * @param tid global tunnel number
1302 * @return tunnel handler, NULL if doesn't exist
1304 static struct MeshTunnel *
1305 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1307 struct MESH_TunnelID id;
1308 GNUNET_HashCode hash;
1313 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1314 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1319 * Search for a tunnel by global ID using full PeerIdentities
1321 * @param oid owner of the tunnel
1322 * @param tid global tunnel number
1324 * @return tunnel handler, NULL if doesn't exist
1326 static struct MeshTunnel *
1327 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1329 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1334 * Callback used to notify a client owner of a tunnel that a peer has
1335 * disconnected, most likely because of a path change.
1337 * @param n Node in the tree representing the disconnected peer
1340 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1342 struct MeshPeerInfo *peer;
1344 if (NULL != n->t->client && NULL != nc)
1346 struct GNUNET_MESH_PeerControl msg;
1347 msg.header.size = htons (sizeof (msg));
1348 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1349 msg.tunnel_id = htonl (n->t->local_tid);
1350 GNUNET_PEER_resolve (n->peer, &msg.peer);
1351 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1352 &msg.header, GNUNET_NO);
1354 peer = peer_info_get_short(n->peer);
1355 peer_info_connect(peer, n->t);
1360 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1361 * needed rescources.
1362 * If peer already exists, reevaluate shortest path and change if different.
1364 * @param t Tunnel we want to add a new peer to
1365 * @param peer PeerInfo of the peer being added
1369 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1371 struct GNUNET_PeerIdentity id;
1372 struct MeshPeerPath *best_p;
1373 struct MeshPeerPath *p;
1374 unsigned int best_cost;
1377 GNUNET_PEER_resolve(peer->id, &id);
1379 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1382 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1383 GNUNET_CONTAINER_multihashmap_put(
1387 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1390 if (NULL != (p = peer->path_head))
1393 best_cost = path_get_cost(t->tree, p);
1396 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1403 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1404 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1405 t->path_refresh_task =
1406 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1410 /* Start a DHT get if necessary */
1411 peer_info_connect(peer, t);
1416 * Add a path to a tunnel which we don't own, just to remember the next hop.
1417 * If destination node was already in the tunnel, the first hop information
1418 * will be replaced with the new path.
1420 * @param t Tunnel we want to add a new peer to
1421 * @param p Path to add
1422 * @param own_pos Position of local node in path.
1426 tunnel_add_path (struct MeshTunnel *t,
1427 struct MeshPeerPath *p,
1428 unsigned int own_pos)
1430 struct GNUNET_PeerIdentity id;
1432 GNUNET_assert (0 != own_pos);
1433 tree_add_path(t->tree, p, NULL);
1434 if (NULL == t->tree->me)
1435 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1436 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1437 tree_update_first_hops(t->tree, t->tree->me, &id);
1442 * Notify a tunnel that a connection has broken that affects at least
1443 * some of its peers.
1445 * @param t Tunnel affected.
1446 * @param peer Peer that (at least) has been affected by the disconnection.
1447 * @param p1 Peer that got disconnected from p2.
1448 * @param p2 Peer that got disconnected from p1.
1450 * @return Short ID of the peer disconnected (either p1 or p2).
1451 * 0 if the tunnel remained unaffected.
1453 static GNUNET_PEER_Id
1454 tunnel_notify_connection_broken (struct MeshTunnel *t,
1455 struct MeshPeerInfo *peer,
1459 return tree_notify_connection_broken (t->tree, p1, p2,
1460 ¬ify_peer_disconnected);
1465 * Destroy the tunnel and free any allocated resources linked to it
1467 * @param t the tunnel to destroy
1469 * @return GNUNET_OK on success
1472 tunnel_destroy (struct MeshTunnel *t)
1474 struct MeshClient *c;
1475 struct MeshQueue *q;
1476 struct MeshQueue *qn;
1477 GNUNET_HashCode hash;
1480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1489 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1490 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1495 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1496 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1500 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1504 if (NULL != q->data)
1505 GNUNET_free (q->data);
1509 /* TODO cancel core transmit ready in case it was active */
1511 tree_destroy(t->tree);
1512 if (NULL != t->dht_get_type)
1513 GNUNET_DHT_get_stop(t->dht_get_type);
1514 t->dht_get_type = NULL;
1521 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1522 * client when the client disconnects.
1524 * @param cls closure (client that is disconnecting)
1525 * @param key the hash of the local tunnel id (used to access the hashmap)
1526 * @param value the value stored at the key (tunnel to destroy)
1528 * @return GNUNET_OK on success
1531 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1533 struct MeshTunnel *t = value;
1536 if (NULL != t->dht_get_type)
1538 GNUNET_DHT_get_stop (t->dht_get_type);
1540 r = tunnel_destroy (t);
1545 /******************************************************************************/
1546 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1547 /******************************************************************************/
1550 * Function called to notify a client about the socket
1551 * being ready to queue more data. "buf" will be
1552 * NULL and "size" zero if the socket was closed for
1553 * writing in the meantime.
1555 * @param cls closure
1556 * @param size number of bytes available in buf
1557 * @param buf where the callee should write the message
1558 * @return number of bytes written to buf
1561 send_core_create_path (void *cls, size_t size, void *buf)
1563 struct MeshPathInfo *info = cls;
1564 struct GNUNET_MESH_ManipulatePath *msg;
1565 struct GNUNET_PeerIdentity *peer_ptr;
1566 struct MeshPeerInfo *peer = info->peer;
1567 struct MeshTunnel *t = info->t;
1568 struct MeshPeerPath *p = info->path;
1573 sizeof (struct GNUNET_MESH_ManipulatePath) +
1574 p->length * sizeof (struct GNUNET_PeerIdentity);
1576 if (size < size_needed || NULL == buf)
1578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
1579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
1580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
1582 info->peer->core_transmit[info->pos] =
1583 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1584 GNUNET_TIME_UNIT_FOREVER_REL,
1585 path_get_first_hop (t->tree, peer->id),
1587 &send_core_create_path,
1592 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1593 msg->header.size = htons (size_needed);
1594 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1595 msg->tid = ntohl (t->id.tid);
1597 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1598 for (i = 0; i < p->length; i++)
1600 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1607 "MESH: CREATE PATH (%u bytes long) sent!\n",
1615 * Function called to notify a client about the socket
1616 * being ready to queue more data. "buf" will be
1617 * NULL and "size" zero if the socket was closed for
1618 * writing in the meantime.
1620 * @param cls closure (MeshDataDescriptor with all info to build packet)
1621 * @param size number of bytes available in buf
1622 * @param buf where the callee should write the message
1623 * @return number of bytes written to buf
1626 send_core_data_to_origin (void *cls, size_t size, void *buf)
1628 struct MeshDataDescriptor *info = cls;
1629 struct GNUNET_MESH_ToOrigin *msg = buf;
1632 GNUNET_assert (NULL != info);
1633 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1634 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1636 if (total_size > size)
1638 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1639 "not enough buffer to send data to origin\n");
1642 msg->header.size = htons (total_size);
1643 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1644 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1645 msg->tid = htonl (info->origin->tid);
1646 if (0 != info->size)
1648 memcpy (&msg[1], &info[1], info->size);
1650 if (NULL != info->client)
1652 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1661 * Function called to notify a client about the socket
1662 * being ready to queue more data. "buf" will be
1663 * NULL and "size" zero if the socket was closed for
1664 * writing in the meantime.
1666 * @param cls closure (data itself)
1667 * @param size number of bytes available in buf
1668 * @param buf where the callee should write the message
1670 * @return number of bytes written to buf
1673 send_core_data_multicast (void *cls, size_t size, void *buf)
1675 struct MeshDataDescriptor *info = cls;
1676 struct GNUNET_MESH_Multicast *msg = buf;
1679 GNUNET_assert (NULL != info);
1680 GNUNET_assert (NULL != info->peer);
1681 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1682 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1684 if (total_size > size)
1687 struct GNUNET_PeerIdentity id;
1689 GNUNET_PEER_resolve(info->peer->id, &id);
1690 info->peer->infos[info->handler_n] = info;
1691 info->peer->types[info->handler_n] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1692 info->peer->core_transmit[info->handler_n] =
1693 GNUNET_CORE_notify_transmit_ready (core_handle,
1696 GNUNET_TIME_UNIT_FOREVER_REL,
1699 &send_core_data_multicast,
1703 info->peer->core_transmit[info->handler_n] = NULL;
1704 info->peer->infos[info->handler_n] = NULL;
1705 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1706 msg->header.size = htons (total_size);
1707 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1708 msg->tid = htonl (info->origin->tid);
1709 memcpy (&msg[1], info->data, info->size);
1710 if (0 == --(*info->copies))
1712 if (NULL != info->client)
1714 /* FIXME One unresponsive neighbor (who doesn't "call" tmt_rdy) can lock
1715 * the client from sending anything else to the service.
1716 * - Call receive_done after certain timeout.
1717 * - Here cancel the timeout.
1719 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1721 GNUNET_free (info->data);
1722 GNUNET_free (info->copies);
1730 * Function called to notify a client about the socket
1731 * being ready to queue more data. "buf" will be
1732 * NULL and "size" zero if the socket was closed for
1733 * writing in the meantime.
1735 * @param cls closure (MeshDataDescriptor)
1736 * @param size number of bytes available in buf
1737 * @param buf where the callee should write the message
1738 * @return number of bytes written to buf
1741 send_core_path_ack (void *cls, size_t size, void *buf)
1743 struct MeshDataDescriptor *info = cls;
1744 struct GNUNET_MESH_PathACK *msg = buf;
1746 GNUNET_assert (NULL != info);
1749 info->peer->core_transmit[info->handler_n] = NULL;
1751 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1756 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1757 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1758 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1759 msg->tid = htonl (info->origin->tid);
1760 msg->peer_id = my_full_id;
1762 /* TODO add signature */
1764 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
1765 return sizeof (struct GNUNET_MESH_PathACK);
1770 * Function called to notify a client about the socket
1771 * being ready to queue more data. "buf" will be
1772 * NULL and "size" zero if the socket was closed for
1773 * writing in the meantime.
1775 * @param cls closure (data itself)
1776 * @param size number of bytes available in buf
1777 * @param buf where the callee should write the message
1778 * @return number of bytes written to buf
1781 send_core_data_raw (void *cls, size_t size, void *buf)
1783 struct GNUNET_MessageHeader *msg = cls;
1786 GNUNET_assert (NULL != msg);
1787 total_size = ntohs (msg->size);
1789 if (total_size > size)
1794 memcpy (buf, msg, total_size);
1802 * Send another peer a notification to destroy a tunnel
1803 * @param cls The tunnel to destroy
1804 * @param size Size in the buffer
1805 * @param buf Memory where to put the data to transmit
1806 * @return Size of data put in buffer
1809 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1811 struct MeshTunnel *t = cls;
1812 struct MeshClient *c;
1813 struct GNUNET_MESH_TunnelMessage *msg;
1817 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1818 /*FIXME*/ msg->header.size =
1819 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1820 msg->tunnel_id = htonl (t->id.tid);
1822 tunnel_destroy (c, t);
1823 return sizeof (struct GNUNET_MESH_TunnelMessage);
1828 /******************************************************************************/
1829 /******************** MESH NETWORK HANDLERS **************************/
1830 /******************************************************************************/
1834 * Core handler for path creation
1835 * struct GNUNET_CORE_MessageHandler
1837 * @param cls closure
1838 * @param message message
1839 * @param peer peer identity this notification is about
1840 * @param atsi performance data
1841 * @return GNUNET_OK to keep the connection open,
1842 * GNUNET_SYSERR to close it (signal serious error)
1846 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1847 const struct GNUNET_MessageHeader *message,
1848 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1850 unsigned int own_pos;
1853 MESH_TunnelNumber tid;
1854 struct GNUNET_MESH_ManipulatePath *msg;
1855 struct GNUNET_PeerIdentity *pi;
1856 GNUNET_HashCode hash;
1857 struct MeshPeerPath *path;
1858 struct MeshPeerInfo *dest_peer_info;
1859 struct MeshPeerInfo *orig_peer_info;
1860 struct MeshTunnel *t;
1862 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1863 "MESH: Received a path create msg [%s]\n",
1864 GNUNET_i2s(&my_full_id));
1865 size = ntohs (message->size);
1866 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1868 GNUNET_break_op (0);
1872 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1873 if (size % sizeof (struct GNUNET_PeerIdentity))
1875 GNUNET_break_op (0);
1878 size /= sizeof (struct GNUNET_PeerIdentity);
1881 GNUNET_break_op (0);
1884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1885 "MESH: path has %u hops.\n",
1887 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1889 tid = ntohl (msg->tid);
1890 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1891 t = tunnel_get (pi, tid);
1892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1893 "MESH: path is for tunnel %s [%X].\n",
1898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1899 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1900 t->id.oid = GNUNET_PEER_intern (pi);
1902 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1903 t->local_tid = next_local_tid++;
1904 /* FIXME test if taken */
1905 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
1906 t->tree = tree_new(t, t->id.oid);
1908 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1910 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1911 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1918 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1919 if (NULL == dest_peer_info)
1921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1922 "MESH: Creating PeerInfo for destination.\n");
1923 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1924 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1925 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1927 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1929 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1930 if (NULL == orig_peer_info)
1932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1933 "MESH: Creating PeerInfo for origin.\n");
1934 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1935 orig_peer_info->id = GNUNET_PEER_intern (pi);
1936 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1937 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
1940 path = path_new (size);
1942 for (i = 0; i < size; i++)
1944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1945 "MESH: ... adding %s\n",
1946 GNUNET_i2s(&pi[i]));
1947 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1948 if (path->peers[i] == myid)
1951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1952 "MESH: Own position: %u\n", own_pos);
1955 /* cannot be self, must be 'not found' */
1956 /* create path: self not found in path through self */
1957 GNUNET_break_op (0);
1958 path_destroy (path);
1959 /* FIXME error. destroy tunnel? leave for timeout? */
1962 tunnel_add_path (t, path, own_pos);
1963 t->tree->me = tree_find_peer(t->tree->root, myid);
1964 if (own_pos == size - 1)
1966 /* It is for us! Send ack. */
1967 struct GNUNET_MESH_TunnelNotification cmsg;
1968 struct MeshDataDescriptor *info;
1971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1972 "MESH: It's for us!\n");
1973 path_add_to_origin (orig_peer_info, path);
1974 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1975 info->origin = &t->id;
1976 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1977 GNUNET_assert (NULL != info->peer);
1978 for (j = 0; info->peer->core_transmit[j]; j++)
1980 if (j == (CORE_QUEUE_SIZE - 1))
1987 info->handler_n = j;
1988 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
1989 info->peer->infos[j] = info;
1990 info->peer->core_transmit[j] =
1991 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1992 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1993 sizeof (struct GNUNET_MESH_PathACK),
1994 &send_core_path_ack, info);
1995 cmsg.header.size = htons(sizeof(cmsg));
1996 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1997 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
1998 cmsg.tunnel_id = htonl(t->local_tid);
1999 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2003 struct MeshPeerPath *path2;
2005 /* It's for somebody else! Retransmit. */
2006 path2 = path_duplicate(path);
2007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2008 "MESH: Retransmitting.\n");
2009 path_add_to_peer(dest_peer_info, path);
2010 path = path_duplicate(path2);
2011 path_add_to_origin(orig_peer_info, path2);
2012 send_create_path(dest_peer_info, path, t);
2019 * Core handler for mesh network traffic going from the origin to a peer
2021 * @param cls closure
2022 * @param peer peer identity this notification is about
2023 * @param message message
2024 * @param atsi performance data
2025 * @return GNUNET_OK to keep the connection open,
2026 * GNUNET_SYSERR to close it (signal serious error)
2029 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2030 const struct GNUNET_MessageHeader *message,
2031 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2033 struct GNUNET_MESH_Unicast *msg;
2034 struct MeshTunnel *t;
2038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2039 "MESH: got a unicast packet from %s\n",
2041 size = ntohs (message->size);
2043 sizeof (struct GNUNET_MESH_Unicast) +
2044 sizeof (struct GNUNET_MessageHeader))
2049 msg = (struct GNUNET_MESH_Unicast *) message;
2050 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2053 /* TODO notify back: we don't know this tunnel */
2054 GNUNET_break_op (0);
2057 pid = GNUNET_PEER_search(&msg->destination);
2060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2061 "MESH: it's for us! sending to clients...\n");
2062 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2066 "MESH: not for us, retransmitting...\n");
2067 msg = GNUNET_malloc (size);
2068 memcpy (msg, message, size);
2069 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2070 GNUNET_TIME_UNIT_FOREVER_REL,
2071 path_get_first_hop (t->tree, pid),
2073 &send_core_data_raw, msg);
2079 * Core handler for mesh network traffic going from the origin to all peers
2081 * @param cls closure
2082 * @param message message
2083 * @param peer peer identity this notification is about
2084 * @param atsi performance data
2085 * @return GNUNET_OK to keep the connection open,
2086 * GNUNET_SYSERR to close it (signal serious error)
2088 * TODO: Check who we got this from, to validate route.
2091 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2092 const struct GNUNET_MessageHeader *message,
2093 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2095 struct GNUNET_MESH_Multicast *msg;
2096 struct GNUNET_PeerIdentity *id;
2097 struct MeshDataDescriptor *info;
2098 struct MeshTunnelTreeNode *n;
2099 struct MeshTunnel *t;
2100 unsigned int *copies;
2105 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Multicast);
2106 if (size < sizeof (struct GNUNET_MessageHeader))
2108 GNUNET_break_op (0);
2111 msg = (struct GNUNET_MESH_Multicast *) message;
2112 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2116 /* TODO notify that we dont know that tunnel */
2117 GNUNET_break_op (0);
2121 /* Transmit to locally interested clients */
2122 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2124 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2126 n = t->tree->me->children_head;
2129 copies = GNUNET_malloc (sizeof (unsigned int));
2130 for (*copies = 0; NULL != n; n = n->next)
2132 n = t->tree->me->children_head;
2133 data = GNUNET_malloc (size);
2134 memcpy (data, &msg[1], size);
2137 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2138 info->origin = &t->id;
2141 info->copies = copies;
2142 info->client = t->client->handle;
2143 info->destination = n->peer;
2144 id = path_get_first_hop(t->tree, n->peer);
2145 info->peer = peer_info_get(id);
2146 GNUNET_assert (NULL != info->peer);
2147 for (i = 0; NULL != info->peer->core_transmit[i]; i++)
2149 if (i == (CORE_QUEUE_SIZE - 1))
2156 info->handler_n = i;
2157 info->peer->infos[i] = info;
2158 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2159 info->peer->core_transmit[i] =
2160 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2161 GNUNET_TIME_UNIT_FOREVER_REL, id,
2162 ntohs (msg->header.size),
2163 &send_core_data_multicast, info);
2171 * Core handler for mesh network traffic
2173 * @param cls closure
2174 * @param message message
2175 * @param peer peer identity this notification is about
2176 * @param atsi performance data
2178 * @return GNUNET_OK to keep the connection open,
2179 * GNUNET_SYSERR to close it (signal serious error)
2182 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2183 const struct GNUNET_MessageHeader *message,
2184 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2186 struct GNUNET_MESH_ToOrigin *msg;
2187 struct GNUNET_PeerIdentity id;
2188 struct MeshPeerInfo *peer_info;
2189 struct MeshTunnel *t;
2192 size = ntohs (message->size);
2193 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2194 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2196 GNUNET_break_op (0);
2199 msg = (struct GNUNET_MESH_ToOrigin *) message;
2200 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2204 /* TODO notify that we dont know this tunnel (whom)? */
2208 if (t->id.oid == myid)
2210 if (NULL == t->client)
2212 /* got data packet for ownerless tunnel */
2213 GNUNET_break_op (0);
2216 /* TODO signature verification */
2217 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
2221 peer_info = peer_info_get (&msg->oid);
2222 if (NULL == peer_info)
2224 /* unknown origin of tunnel */
2228 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2229 msg = GNUNET_malloc (size);
2230 memcpy (msg, message, size);
2231 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2232 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2233 &send_core_data_raw, msg);
2240 * Core handler for path ACKs
2242 * @param cls closure
2243 * @param message message
2244 * @param peer peer identity this notification is about
2245 * @param atsi performance data
2247 * @return GNUNET_OK to keep the connection open,
2248 * GNUNET_SYSERR to close it (signal serious error)
2251 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2252 const struct GNUNET_MessageHeader *message,
2253 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2255 struct GNUNET_MESH_PathACK *msg;
2256 struct GNUNET_PeerIdentity id;
2257 struct MeshTunnelTreeNode *n;
2258 struct MeshPeerInfo *peer_info;
2259 struct MeshTunnel *t;
2261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2262 "MESH: Received a path ACK msg [%s]\n",
2263 GNUNET_i2s(&my_full_id));
2264 msg = (struct GNUNET_MESH_PathACK *) message;
2265 t = tunnel_get (&msg->oid, msg->tid);
2268 /* TODO notify that we don't know the tunnel */
2272 /* Message for us? */
2273 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2275 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2276 "MESH: It's for us!\n");
2277 if (NULL == t->client)
2279 GNUNET_break_op (0);
2282 peer_info = peer_info_get (&msg->peer_id);
2283 if (NULL == peer_info)
2285 GNUNET_break_op (0);
2288 n = tree_find_peer(t->tree->root, peer_info->id);
2291 GNUNET_break_op (0);
2294 n->status = MESH_PEER_READY;
2295 send_client_peer_connected(t, peer_info->id);
2299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2300 "MESH: not for us, retransmitting...\n");
2301 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2302 peer_info = peer_info_get (&msg->oid);
2303 if (NULL == peer_info)
2305 /* If we know the tunnel, we should DEFINITELY know the peer */
2309 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2310 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2311 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2312 GNUNET_TIME_UNIT_FOREVER_REL,
2314 sizeof (struct GNUNET_MESH_PathACK),
2315 &send_core_data_raw, msg);
2321 * Functions to handle messages from core
2323 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2324 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2325 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2326 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2327 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2328 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2329 sizeof (struct GNUNET_MESH_PathACK)},
2335 /******************************************************************************/
2336 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2337 /******************************************************************************/
2340 * deregister_app: iterator for removing each application registered by a client
2342 * @param cls closure
2343 * @param key the hash of the application id (used to access the hashmap)
2344 * @param value the value stored at the key (client)
2346 * @return GNUNET_OK on success
2349 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2351 GNUNET_break (GNUNET_YES ==
2352 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
2358 * notify_client_connection_failure: notify a client that the connection to the
2359 * requested remote peer is not possible (for instance, no route found)
2360 * Function called when the socket is ready to queue more data. "buf" will be
2361 * NULL and "size" zero if the socket was closed for writing in the meantime.
2363 * @param cls closure
2364 * @param size number of bytes available in buf
2365 * @param buf where the callee should write the message
2366 * @return number of bytes written to buf
2369 notify_client_connection_failure (void *cls, size_t size, void *buf)
2372 struct MeshPeerInfo *peer_info;
2373 struct GNUNET_MESH_PeerControl *msg;
2374 struct GNUNET_PeerIdentity id;
2376 if (0 == size && NULL == buf)
2378 // TODO retry? cancel?
2382 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2383 peer_info = (struct MeshPeerInfo *) cls;
2384 msg = (struct GNUNET_MESH_PeerControl *) buf;
2385 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2386 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2387 // msg->tunnel_id = htonl(peer_info->t->tid);
2388 GNUNET_PEER_resolve (peer_info->id, &id);
2389 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2397 * Send keepalive packets for a peer
2399 * @param cls Closure (tunnel for which to send the keepalive).
2400 * @param tc Notification context.
2402 * TODO: implement explicit multicast keepalive?
2405 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2407 struct MeshTunnel *t = cls;
2408 struct GNUNET_MessageHeader *payload;
2409 struct GNUNET_MESH_Multicast *msg;
2412 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2413 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2419 "MESH: sending keepalive for tunnel %d\n",
2422 size = sizeof(struct GNUNET_MESH_Multicast) +
2423 sizeof(struct GNUNET_MessageHeader);
2424 msg = GNUNET_malloc (size);
2425 msg->header.size = htons (size);
2426 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2427 msg->oid = my_full_id;
2428 msg->tid = htonl(t->id.tid);
2429 payload = (struct GNUNET_MessageHeader *) &msg[1];
2430 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2431 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2432 handle_mesh_data_multicast (NULL, &my_full_id, &msg->header, NULL);
2435 t->path_refresh_task =
2436 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
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
2453 * TODO: re-issue the request after certain time? cancel after X results?
2456 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2457 const GNUNET_HashCode * key,
2458 const struct GNUNET_PeerIdentity *get_path,
2459 unsigned int get_path_length,
2460 const struct GNUNET_PeerIdentity *put_path,
2461 unsigned int put_path_length,
2462 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2464 struct MeshPathInfo *path_info = cls;
2465 struct MeshPeerPath *p;
2466 struct GNUNET_PeerIdentity pi;
2469 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2470 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2471 "MESH: Got results from DHT for %s\n",
2472 GNUNET_h2s_full(&pi.hashPubKey));
2473 GNUNET_DHT_get_stop(path_info->peer->dhtget);
2474 path_info->peer->dhtget = NULL;
2476 p = path_build_from_dht (get_path, get_path_length,
2477 put_path, put_path_length);
2478 path_add_to_peer (path_info->peer, p);
2479 for (i = 0; i < path_info->peer->ntunnels; i++)
2481 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2482 peer_info_connect(path_info->peer, path_info->t);
2484 GNUNET_free (path_info);
2491 * Function to process paths received for a new peer addition. The recorded
2492 * paths form the initial tunnel, which can be optimized later.
2493 * Called on each result obtained for the DHT search.
2495 * @param cls closure
2496 * @param exp when will this value expire
2497 * @param key key of the result
2498 * @param type type of the result
2499 * @param size number of bytes in data
2500 * @param data pointer to the result data
2503 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2504 const GNUNET_HashCode * key,
2505 const struct GNUNET_PeerIdentity *get_path,
2506 unsigned int get_path_length,
2507 const struct GNUNET_PeerIdentity *put_path,
2508 unsigned int put_path_length,
2509 enum GNUNET_BLOCK_Type type, size_t size,
2512 const struct GNUNET_PeerIdentity *pi = data;
2513 struct GNUNET_PeerIdentity id;
2514 struct MeshTunnel *t = cls;
2515 struct MeshPeerInfo *peer_info;
2516 struct MeshPathInfo *path_info;
2517 struct MeshPeerPath *p;
2520 if (size != sizeof (struct GNUNET_PeerIdentity))
2522 GNUNET_break_op (0);
2525 GNUNET_assert (NULL != t->client);
2526 GNUNET_DHT_get_stop (t->dht_get_type);
2527 t->dht_get_type = NULL;
2528 peer_info = peer_info_get (pi);
2529 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2530 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2532 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2533 NULL == peer_info->dhtget)
2535 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2536 path_info->peer = peer_info;
2538 /* we don't have a route to the peer, let's try a direct lookup */
2540 GNUNET_DHT_get_start (dht_handle, /* handle */
2541 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2542 GNUNET_BLOCK_TYPE_TEST, /* block type */
2543 &pi->hashPubKey, /* key to look up */
2544 10U, /* replication level */
2545 GNUNET_DHT_RO_RECORD_ROUTE |
2546 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2547 /* option to dht: record route */
2549 0, /* xquery bits */
2550 dht_get_id_handler, /* callback */
2551 path_info); /* closure */
2555 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2556 path_add_to_peer (peer_info, p);
2557 tunnel_add_peer(t, peer_info);
2558 p = tree_get_path_to_peer(t->tree, peer_info->id);
2560 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2561 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2562 t->local_tid, p->length);
2563 for (i = 0; i < p->length; i++)
2565 GNUNET_PEER_resolve (p->peers[0], &id);
2566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2567 GNUNET_h2s_full (&id.hashPubKey));
2573 send_create_path(peer_info, p, t);
2577 send_client_peer_connected(t, myid);
2581 /******************************************************************************/
2582 /********************* MESH LOCAL HANDLES **************************/
2583 /******************************************************************************/
2587 * Handler for client disconnection
2589 * @param cls closure
2590 * @param client identification of the client; NULL
2591 * for the last call when the server is destroyed
2594 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2596 struct MeshClient *c;
2597 struct MeshClient *next;
2599 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2605 if (c->handle != client && NULL != client)
2607 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2612 if (NULL != c->tunnels)
2614 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2615 &tunnel_destroy_iterator,
2617 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2620 /* deregister clients applications */
2621 if (NULL != c->apps)
2623 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2624 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2626 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2627 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2629 GNUNET_SCHEDULER_cancel (announce_applications_task);
2630 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2632 if (NULL != c->types)
2633 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2634 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2646 * Handler for new clients
2648 * @param cls closure
2649 * @param client identification of the client
2650 * @param message the actual message, which includes messages the client wants
2653 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2654 const struct GNUNET_MessageHeader *message)
2656 struct GNUNET_MESH_ClientConnect *cc_msg;
2657 struct MeshClient *c;
2658 GNUNET_MESH_ApplicationType *a;
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2666 /* Check data sanity */
2667 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2668 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2669 ntypes = ntohs (cc_msg->types);
2670 napps = ntohs (cc_msg->applications);
2672 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2675 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2679 /* Create new client structure */
2680 c = GNUNET_malloc (sizeof (struct MeshClient));
2682 c->id = next_client_id++;
2685 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2688 GNUNET_MESH_ApplicationType at;
2691 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2692 for (i = 0; i < napps; i++)
2695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2696 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2697 /* store in clients hashmap */
2698 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2699 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2700 /* store in global hashmap, for announcements */
2701 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2702 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2704 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2705 announce_applications_task =
2706 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2714 t = (uint16_t *) & a[napps];
2715 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2716 for (i = 0; i < ntypes; i++)
2719 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2721 /* store in clients hashmap */
2722 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2723 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2724 /* store in global hashmap */
2725 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2726 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2729 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2730 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2732 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2733 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2734 GNUNET_SERVER_notification_context_add (nc, client);
2736 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2744 * Handler for requests of new tunnels
2746 * @param cls closure
2747 * @param client identification of the client
2748 * @param message the actual message
2751 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2752 const struct GNUNET_MessageHeader *message)
2754 struct GNUNET_MESH_TunnelMessage *t_msg;
2755 struct MeshTunnel *t;
2756 struct MeshClient *c;
2757 GNUNET_HashCode hash;
2759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2761 /* Sanity check for client registration */
2762 if (NULL == (c = client_get (client)))
2765 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2772 /* Message sanity check */
2773 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2776 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2780 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2781 /* Sanity check for tunnel numbering */
2782 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2785 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2788 /* Sanity check for duplicate tunnel IDs */
2789 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2792 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2796 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2798 while (NULL != tunnel_get_by_pi (myid, next_tid))
2799 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2800 t->id.tid = next_tid++;
2802 t->local_tid = ntohl (t_msg->tunnel_id);
2804 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2806 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2808 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2809 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2812 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2816 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2818 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2819 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2822 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2825 t->tree = tree_new (t, myid);
2826 t->tree->refresh = REFRESH_PATH_TIME;
2827 t->tree->root->status = MESH_PEER_READY;
2828 t->tree->me = t->tree->root;
2830 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2836 * Handler for requests of deleting tunnels
2838 * @param cls closure
2839 * @param client identification of the client
2840 * @param message the actual message
2843 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2844 const struct GNUNET_MessageHeader *message)
2846 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2847 struct MeshClient *c;
2848 struct MeshTunnel *t;
2849 MESH_TunnelNumber tid;
2850 GNUNET_HashCode hash;
2852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2854 /* Sanity check for client registration */
2855 if (NULL == (c = client_get (client)))
2858 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2861 /* Message sanity check */
2862 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2865 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2871 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2873 /* Retrieve tunnel */
2874 tid = ntohl (tunnel_msg->tunnel_id);
2876 /* Remove from local id hashmap */
2877 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2878 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2879 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2881 /* Remove from global id hashmap */
2882 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2883 GNUNET_break (GNUNET_YES ==
2884 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t));
2886 // notify_tunnel_destroy(t); FIXME
2888 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2894 * Handler for connection requests to new peers
2896 * @param cls closure
2897 * @param client identification of the client
2898 * @param message the actual message (PeerControl)
2901 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2902 const struct GNUNET_MessageHeader *message)
2904 struct GNUNET_MESH_PeerControl *peer_msg;
2905 struct MeshPeerInfo *peer_info;
2906 struct MeshClient *c;
2907 struct MeshTunnel *t;
2908 MESH_TunnelNumber tid;
2910 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
2911 /* Sanity check for client registration */
2912 if (NULL == (c = client_get (client)))
2915 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2919 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2920 /* Sanity check for message size */
2921 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2924 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2928 /* Tunnel exists? */
2929 tid = ntohl (peer_msg->tunnel_id);
2930 t = tunnel_get_by_local_id (c, tid);
2934 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2938 /* Does client own tunnel? */
2939 if (t->client->handle != client)
2942 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2945 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
2946 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
2947 peer_info = peer_info_get (&peer_msg->peer);
2949 tunnel_add_peer(t, peer_info);
2950 peer_info_connect(peer_info, t);
2952 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2958 * Handler for disconnection requests of peers in a tunnel
2960 * @param cls closure
2961 * @param client identification of the client
2962 * @param message the actual message (PeerControl)
2965 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2966 const struct GNUNET_MessageHeader *message)
2968 struct GNUNET_MESH_PeerControl *peer_msg;
2969 struct MeshClient *c;
2970 struct MeshTunnel *t;
2971 MESH_TunnelNumber tid;
2973 /* Sanity check for client registration */
2974 if (NULL == (c = client_get (client)))
2977 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2980 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2981 /* Sanity check for message size */
2982 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2985 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2989 /* Tunnel exists? */
2990 tid = ntohl (peer_msg->tunnel_id);
2991 t = tunnel_get_by_local_id (c, tid);
2995 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2999 /* Does client own tunnel? */
3000 if (t->client->handle != client)
3003 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3007 /* Ok, delete peer from tunnel */
3008 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3009 &peer_msg->peer.hashPubKey);
3011 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3017 * Handler for connection requests to new peers by type
3019 * @param cls closure
3020 * @param client identification of the client
3021 * @param message the actual message (ConnectPeerByType)
3024 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3025 const struct GNUNET_MessageHeader *message)
3027 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3028 struct MeshClient *c;
3029 struct MeshTunnel *t;
3030 GNUNET_HashCode hash;
3031 MESH_TunnelNumber tid;
3033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3034 /* Sanity check for client registration */
3035 if (NULL == (c = client_get (client)))
3038 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3042 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3043 /* Sanity check for message size */
3044 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3045 ntohs (connect_msg->header.size))
3048 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3052 /* Tunnel exists? */
3053 tid = ntohl (connect_msg->tunnel_id);
3054 t = tunnel_get_by_local_id (c, tid);
3058 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3062 /* Does client own tunnel? */
3063 if (t->client->handle != client)
3066 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3070 /* Do WE have the service? */
3071 t->type = ntohl (connect_msg->type);
3072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3073 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3074 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3077 /* Yes! Fast forward, add ourselves to the tunnel and send the
3078 * good news to the client
3080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3081 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3082 peer_info_get (&my_full_id),
3083 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3085 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3086 send_client_peer_connected(t, myid);
3087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3088 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3091 /* Ok, lets find a peer offering the service */
3092 if (NULL != t->dht_get_type)
3094 GNUNET_DHT_get_stop (t->dht_get_type);
3096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3097 GNUNET_h2s_full (&hash));
3099 GNUNET_DHT_get_start (dht_handle,
3100 GNUNET_TIME_UNIT_FOREVER_REL,
3101 GNUNET_BLOCK_TYPE_TEST,
3104 GNUNET_DHT_RO_RECORD_ROUTE |
3105 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3107 &dht_get_type_handler, t);
3109 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3115 * Handler for client traffic directed to one peer
3117 * @param cls closure
3118 * @param client identification of the client
3119 * @param message the actual message
3122 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3123 const struct GNUNET_MessageHeader *message)
3125 struct MeshClient *c;
3126 struct MeshTunnel *t;
3127 struct MeshPeerInfo *pi;
3128 struct GNUNET_MESH_Unicast *data_msg;
3129 MESH_TunnelNumber tid;
3132 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3133 "MESH: Got a unicast request from a client!\n");
3135 /* Sanity check for client registration */
3136 if (NULL == (c = client_get (client)))
3139 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3142 data_msg = (struct GNUNET_MESH_Unicast *) message;
3143 /* Sanity check for message size */
3144 size = ntohs (message->size);
3145 if (sizeof (struct GNUNET_MESH_Unicast) +
3146 sizeof (struct GNUNET_MessageHeader) > size)
3149 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3153 /* Tunnel exists? */
3154 tid = ntohl (data_msg->tid);
3155 t = tunnel_get_by_local_id (c, tid);
3159 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3163 /* Is it a local tunnel? Then, does client own the tunnel? */
3164 if (t->client->handle != NULL && t->client->handle != client)
3167 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3171 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3172 &data_msg->destination.hashPubKey);
3173 /* Is the selected peer in the tunnel? */
3177 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3181 /* Ok, everything is correct, send the message
3182 * (pretend we got it from a mesh peer)
3185 char buf[ntohs (message->size)];
3186 struct GNUNET_MESH_Unicast *copy;
3188 /* Work around const limitation */
3189 copy = (struct GNUNET_MESH_Unicast *) buf;
3190 memcpy (buf, data_msg, size);
3191 copy->oid = my_full_id;
3192 copy->tid = htonl (t->id.tid);
3193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3194 "MESH: calling generic handler...\n");
3195 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL);
3197 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3202 * Handler for client traffic directed to all peers in a tunnel
3204 * @param cls closure
3205 * @param client identification of the client
3206 * @param message the actual message
3209 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3210 const struct GNUNET_MessageHeader *message)
3212 struct MeshClient *c;
3213 struct MeshTunnel *t;
3214 struct GNUNET_MESH_Multicast *data_msg;
3215 MESH_TunnelNumber tid;
3217 /* Sanity check for client registration */
3218 if (NULL == (c = client_get (client)))
3221 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3224 data_msg = (struct GNUNET_MESH_Multicast *) message;
3225 /* Sanity check for message size */
3226 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3229 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3233 /* Tunnel exists? */
3234 tid = ntohl (data_msg->tid);
3235 t = tunnel_get_by_local_id (c, tid);
3239 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3243 /* Does client own tunnel? */
3244 if (t->client->handle != client)
3247 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3252 char buf[ntohs(message->size)];
3253 struct GNUNET_MESH_Multicast *copy;
3255 copy = (struct GNUNET_MESH_Multicast *)buf;
3256 memcpy(buf, message, ntohs(message->size));
3257 copy->oid = my_full_id;
3258 copy->tid = htonl(t->id.tid);
3259 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL);
3262 /* receive done gets called when last copy is sent */
3267 * Functions to handle messages from clients
3269 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3270 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3271 {&handle_local_tunnel_create, NULL,
3272 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3273 sizeof (struct GNUNET_MESH_TunnelMessage)},
3274 {&handle_local_tunnel_destroy, NULL,
3275 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3276 sizeof (struct GNUNET_MESH_TunnelMessage)},
3277 {&handle_local_connect_add, NULL,
3278 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3279 sizeof (struct GNUNET_MESH_PeerControl)},
3280 {&handle_local_connect_del, NULL,
3281 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3282 sizeof (struct GNUNET_MESH_PeerControl)},
3283 {&handle_local_connect_by_type, NULL,
3284 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3285 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3286 {&handle_local_unicast, NULL,
3287 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3288 {&handle_local_unicast, NULL,
3289 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3290 {&handle_local_multicast, NULL,
3291 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3297 * To be called on core init/fail.
3299 * @param cls service closure
3300 * @param server handle to the server for this service
3301 * @param identity the public identity of this peer
3304 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3305 const struct GNUNET_PeerIdentity *identity)
3307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3308 core_handle = server;
3309 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3311 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3312 GNUNET_SCHEDULER_shutdown();
3318 * Method called whenever a given peer connects.
3320 * @param cls closure
3321 * @param peer peer identity this notification is about
3322 * @param atsi performance data for the connection
3325 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3326 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3328 struct MeshPeerInfo *peer_info;
3329 struct MeshPeerPath *path;
3331 #if MESH_DEBUG_CONNECTION
3332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3334 GNUNET_h2s(&my_full_id.hashPubKey));
3336 peer_info = peer_info_get (peer);
3337 if (myid == peer_info->id)
3339 #if MESH_DEBUG_CONNECTION
3340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3344 #if MESH_DEBUG_CONNECTION
3347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3348 GNUNET_h2s(&peer->hashPubKey));
3351 path = path_new (2);
3352 path->peers[0] = myid;
3353 path->peers[1] = peer_info->id;
3354 GNUNET_PEER_change_rc(myid, 1);
3355 GNUNET_PEER_change_rc(peer_info->id, 1);
3356 path_add_to_peer (peer_info, path);
3361 * Method called whenever a peer disconnects.
3363 * @param cls closure
3364 * @param peer peer identity this notification is about
3367 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3369 struct MeshPeerInfo *pi;
3372 #if MESH_DEBUG_CONNECTION
3373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3375 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3381 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3383 peer_info_cancel_transmission(pi, i);
3385 path_remove_from_peer (pi, pi->id, myid);
3386 #if MESH_DEBUG_CONNECTION
3389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3396 /******************************************************************************/
3397 /************************ MAIN FUNCTIONS ****************************/
3398 /******************************************************************************/
3401 * Iterator over hash map entries.
3403 * @param cls closure
3404 * @param key current key code
3405 * @param value value in the hash map
3406 * @return GNUNET_YES if we should continue to
3411 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
3413 struct MeshTunnel *t = value;
3419 * Task run during shutdown.
3425 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3427 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3428 /* TODO: destroy tunnels? */
3429 if (core_handle != NULL)
3431 GNUNET_CORE_disconnect (core_handle);
3434 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
3435 if (dht_handle != NULL)
3437 GNUNET_DHT_disconnect (dht_handle);
3442 GNUNET_SERVER_notification_context_destroy (nc);
3445 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3447 GNUNET_SCHEDULER_cancel (announce_id_task);
3448 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3450 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3454 * Process mesh requests.
3456 * @param cls closure
3457 * @param server the initialized server
3458 * @param c configuration to use
3461 run (void *cls, struct GNUNET_SERVER_Handle *server,
3462 const struct GNUNET_CONFIGURATION_Handle *c)
3464 struct MeshPeerInfo *peer;
3465 struct MeshPeerPath *p;
3468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3469 server_handle = server;
3470 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3471 CORE_QUEUE_SIZE, /* queue size */
3472 NULL, /* Closure passed to MESH functions */
3473 &core_init, /* Call core_init once connected */
3474 &core_connect, /* Handle connects */
3475 &core_disconnect, /* remove peers on disconnects */
3476 NULL, /* Don't notify about all incoming messages */
3477 GNUNET_NO, /* For header only in notification */
3478 NULL, /* Don't notify about all outbound messages */
3479 GNUNET_NO, /* For header-only out notification */
3480 core_handlers); /* Register these handlers */
3481 if (core_handle == NULL)
3484 GNUNET_SCHEDULER_shutdown ();
3489 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3492 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3494 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3495 GNUNET_SCHEDULER_shutdown ();
3498 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3499 GNUNET_free (keyfile);
3500 if (my_private_key == NULL)
3502 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3503 _("Mesh service could not access hostkey. Exiting.\n"));
3504 GNUNET_SCHEDULER_shutdown ();
3507 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3508 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3509 &my_full_id.hashPubKey);
3510 myid = GNUNET_PEER_intern (&my_full_id);
3512 dht_handle = GNUNET_DHT_connect (c, 64);
3513 if (dht_handle == NULL)
3519 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3521 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3522 peers = GNUNET_CONTAINER_multihashmap_create (32);
3523 applications = GNUNET_CONTAINER_multihashmap_create (32);
3524 types = GNUNET_CONTAINER_multihashmap_create (32);
3526 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3527 nc = GNUNET_SERVER_notification_context_create (server_handle,
3529 GNUNET_SERVER_disconnect_notify (server_handle,
3530 &handle_local_client_disconnect,
3535 clients_tail = NULL;
3540 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3541 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3543 /* Create a peer_info for the local peer */
3544 peer = peer_info_get(&my_full_id);
3547 path_add_to_peer(peer, p);
3549 /* Scheduled the task to clean up when shutdown is called */
3550 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3557 * The main function for the mesh service.
3559 * @param argc number of arguments from the command line
3560 * @param argv command line arguments
3561 * @return 0 ok, 1 on error
3564 main (int argc, char *const *argv)
3569 // fprintf (stderr, "main ()\n");
3571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3574 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3578 // fprintf (stderr, "main () END\n");