2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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)
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);
927 send_client_peer_connected(t, myid);
930 else if (NULL == peer->dhtget)
932 struct GNUNET_PeerIdentity id;
934 GNUNET_PEER_resolve(peer->id, &id);
935 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
936 path_info->peer = peer;
939 GNUNET_DHT_get_start(dht_handle, /* handle */
940 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
941 GNUNET_BLOCK_TYPE_TEST, /* type */
942 &id.hashPubKey, /* key to search */
943 4, /* replication level */
944 GNUNET_DHT_RO_RECORD_ROUTE |
945 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
951 /* Otherwise, there is no path but the DHT get is already started. */
957 * Destroy the peer_info and free any allocated resources linked to it
958 * @param t tunnel the path belongs to
959 * @param pi the peer_info to destroy
960 * @return GNUNET_OK on success
963 peer_info_destroy (struct MeshPeerInfo *pi)
965 GNUNET_HashCode hash;
966 struct GNUNET_PeerIdentity id;
968 GNUNET_PEER_resolve (pi->id, &id);
969 GNUNET_PEER_change_rc (pi->id, -1);
970 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
972 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
973 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
981 * Notify a tunnel that a connection has broken that affects at least
984 * @param t Tunnel affected.
985 * @param peer Peer that (at least) has been affected by the disconnection.
986 * @param p1 Peer that got disconnected from p2.
987 * @param p2 Peer that got disconnected from p1.
989 * @return Short ID of the peer disconnected (either p1 or p2).
990 * 0 if the tunnel remained unaffected.
992 static GNUNET_PEER_Id
993 tunnel_notify_connection_broken (struct MeshTunnel *t,
994 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
998 * Remove all paths that rely on a direct connection between p1 and p2
999 * from the peer itself and notify all tunnels about it.
1001 * @param peer PeerInfo of affected peer.
1002 * @param p1 GNUNET_PEER_Id of one peer.
1003 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1006 * TODO: optimize (see below)
1009 path_remove_from_peer (struct MeshPeerInfo *peer,
1013 struct GNUNET_PeerIdentity id;
1014 struct MeshPeerPath *p;
1015 struct MeshPeerPath *aux;
1016 struct MeshPeerInfo *peer_d;
1018 unsigned int destroyed;
1024 p = peer->path_head;
1028 for (i = 0; i < (p->length - 1); i++)
1030 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1031 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1043 for (i = 0; i < peer->ntunnels; i++)
1045 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
1047 * Problem: one or more peers have been deleted from the tunnel tree.
1048 * We don't know who they are to try to add them again.
1049 * We need to try to find a new path for each of the disconnected peers.
1050 * Some of them might already have a path to reach them that does not
1051 * involve p1 and p2. Adding all anew might render in a better tree than
1052 * the trivial immediate fix.
1054 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1055 * its children will be reachable trough him.
1057 peer_d = peer_info_get_short(d);
1060 for (p = peer_d->path_head; NULL != p; p = p->next)
1062 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1070 /* No callback, as peer will be already disconnected */
1071 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1075 struct MeshPathInfo *path_info;
1077 if (NULL != peer_d->dhtget)
1079 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1080 path_info->path = p;
1081 path_info->peer = peer_d;
1082 path_info->t = peer->tunnels[i];
1084 GNUNET_DHT_get_start(dht_handle, /* handle */
1085 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1086 GNUNET_BLOCK_TYPE_TEST, /* type */
1087 &id.hashPubKey, /*key to search */
1088 4, /* replication level */
1089 GNUNET_DHT_RO_RECORD_ROUTE |
1090 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1092 0, /* xquery bits */
1093 &dht_get_id_handler,
1094 (void *) path_info);
1101 * Add the path to the peer and update the path used to reach it in case this
1104 * @param peer_info Destination peer to add the path to.
1105 * @param path New path to add. Last peer must be the peer in arg 1.
1106 * Path will be either used of freed if already known.
1108 * TODO: trim the part from origin to us? Add it as path to origin?
1111 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1113 struct MeshPeerPath *aux;
1117 if (NULL == peer_info || NULL == path)
1123 l = path_get_length (path);
1130 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1132 l2 = path_get_length (aux);
1135 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1136 peer_info->path_tail, aux, path);
1140 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1147 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1154 * Add the path to the origin peer and update the path used to reach it in case
1155 * this is the shortest.
1156 * The path is given in peer_info -> destination, therefore we turn the path
1157 * upside down first.
1159 * @param peer_info Peer to add the path to, being the origin of the path.
1160 * @param path New path to add after being inversed.
1163 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1166 path_add_to_peer (peer_info, path);
1171 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1172 * to obtain a local peer -> destination path and interning the peer ids.
1174 * @return Newly allocated and created path
1176 static struct MeshPeerPath *
1177 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1178 unsigned int get_path_length,
1179 const struct GNUNET_PeerIdentity *put_path,
1180 unsigned int put_path_length)
1182 struct MeshPeerPath *p;
1188 GNUNET_PEER_change_rc(myid, 1);
1189 i = get_path_length;
1190 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1191 for (i--; i >= 0; i--)
1193 id = GNUNET_PEER_intern (&get_path[i]);
1194 if (p->length > 0 && id == p->peers[p->length - 1])
1196 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1197 GNUNET_PEER_change_rc(id, -1);
1201 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1202 "MESH: Adding from GET: %s.\n",
1203 GNUNET_i2s(&get_path[i]));
1205 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1206 p->peers[p->length - 1] = id;
1209 i = put_path_length;
1210 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1211 for (i--; i >= 0; i--)
1213 id = GNUNET_PEER_intern (&put_path[i]);
1216 /* PUT path went through us, so discard the path up until now and start
1217 * from here to get a much shorter (and loop-free) path.
1222 if (p->length > 0 && id == p->peers[p->length - 1])
1224 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1225 GNUNET_PEER_change_rc(id, -1);
1229 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1230 "MESH: Adding from PUT: %s.\n",
1231 GNUNET_i2s(&put_path[i]));
1233 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1234 p->peers[p->length - 1] = id;
1238 if (get_path_length > 0)
1239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1240 "MESH: (first of GET: %s)\n",
1241 GNUNET_h2s_full(&get_path[0].hashPubKey));
1242 if (put_path_length > 0)
1243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1244 "MESH: (first of PUT: %s)\n",
1245 GNUNET_h2s_full(&put_path[0].hashPubKey));
1246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1247 "MESH: In total: %d hops\n",
1249 for (i = 0; i < p->length; i++)
1251 struct GNUNET_PeerIdentity peer_id;
1253 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1257 GNUNET_h2s_full(&peer_id.hashPubKey));
1265 * Send keepalive packets for a peer
1267 * @param cls Closure (tunnel for which to send the keepalive).
1268 * @param tc Notification context.
1270 * TODO: implement explicit multicast keepalive?
1273 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1277 * Search for a tunnel among the tunnels for a client
1279 * @param c the client whose tunnels to search in
1280 * @param tid the local id of the tunnel
1282 * @return tunnel handler, NULL if doesn't exist
1284 static struct MeshTunnel *
1285 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1287 GNUNET_HashCode hash;
1289 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1290 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1295 * Search for a tunnel by global ID using PEER_ID
1297 * @param pi owner of the tunnel
1298 * @param tid global tunnel number
1300 * @return tunnel handler, NULL if doesn't exist
1302 static struct MeshTunnel *
1303 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1305 struct MESH_TunnelID id;
1306 GNUNET_HashCode hash;
1311 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1312 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1317 * Search for a tunnel by global ID using full PeerIdentities
1319 * @param oid owner of the tunnel
1320 * @param tid global tunnel number
1322 * @return tunnel handler, NULL if doesn't exist
1324 static struct MeshTunnel *
1325 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1327 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1332 * Callback used to notify a client owner of a tunnel that a peer has
1333 * disconnected, most likely because of a path change.
1335 * @param n Node in the tree representing the disconnected peer
1338 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1340 struct MeshPeerInfo *peer;
1342 if (NULL != n->t->client && NULL != nc)
1344 struct GNUNET_MESH_PeerControl msg;
1345 msg.header.size = htons (sizeof (msg));
1346 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1347 msg.tunnel_id = htonl (n->t->local_tid);
1348 GNUNET_PEER_resolve (n->peer, &msg.peer);
1349 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1350 &msg.header, GNUNET_NO);
1352 peer = peer_info_get_short(n->peer);
1353 peer_info_connect(peer, n->t);
1358 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1359 * needed rescources.
1360 * If peer already exists, reevaluate shortest path and change if different.
1362 * @param t Tunnel we want to add a new peer to
1363 * @param peer PeerInfo of the peer being added
1367 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1369 struct GNUNET_PeerIdentity id;
1370 struct MeshPeerPath *best_p;
1371 struct MeshPeerPath *p;
1372 unsigned int best_cost;
1375 GNUNET_PEER_resolve(peer->id, &id);
1377 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1380 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1381 GNUNET_CONTAINER_multihashmap_put(
1385 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1388 if (NULL != (p = peer->path_head))
1391 best_cost = path_get_cost(t->tree, p);
1394 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1401 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1402 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1403 t->path_refresh_task =
1404 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1408 /* Start a DHT get if necessary */
1409 peer_info_connect(peer, t);
1414 * Add a path to a tunnel which we don't own, just to remember the next hop.
1415 * If destination node was already in the tunnel, the first hop information
1416 * will be replaced with the new path.
1418 * @param t Tunnel we want to add a new peer to
1419 * @param p Path to add
1420 * @param own_pos Position of local node in path.
1424 tunnel_add_path (struct MeshTunnel *t,
1425 struct MeshPeerPath *p,
1426 unsigned int own_pos)
1428 GNUNET_assert (0 != own_pos);
1429 tree_add_path(t->tree, p, NULL);
1430 if (NULL == t->tree->me)
1431 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1436 * Notify a tunnel that a connection has broken that affects at least
1437 * some of its peers.
1439 * @param t Tunnel affected.
1440 * @param peer Peer that (at least) has been affected by the disconnection.
1441 * @param p1 Peer that got disconnected from p2.
1442 * @param p2 Peer that got disconnected from p1.
1444 * @return Short ID of the peer disconnected (either p1 or p2).
1445 * 0 if the tunnel remained unaffected.
1447 static GNUNET_PEER_Id
1448 tunnel_notify_connection_broken (struct MeshTunnel *t,
1449 struct MeshPeerInfo *peer,
1453 return tree_notify_connection_broken (t->tree, p1, p2,
1454 ¬ify_peer_disconnected);
1459 * Destroy the tunnel and free any allocated resources linked to it
1461 * @param t the tunnel to destroy
1463 * @return GNUNET_OK on success
1466 tunnel_destroy (struct MeshTunnel *t)
1468 struct MeshClient *c;
1469 struct MeshQueue *q;
1470 struct MeshQueue *qn;
1471 GNUNET_HashCode hash;
1474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1483 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1484 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1489 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1490 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1494 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1498 if (NULL != q->data)
1499 GNUNET_free (q->data);
1503 /* TODO cancel core transmit ready in case it was active */
1505 tree_destroy(t->tree);
1506 if (NULL != t->dht_get_type)
1507 GNUNET_DHT_get_stop(t->dht_get_type);
1508 t->dht_get_type = NULL;
1515 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1516 * client when the client disconnects.
1518 * @param cls closure (client that is disconnecting)
1519 * @param key the hash of the local tunnel id (used to access the hashmap)
1520 * @param value the value stored at the key (tunnel to destroy)
1522 * @return GNUNET_OK on success
1525 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1527 struct MeshTunnel *t = value;
1530 if (NULL != t->dht_get_type)
1532 GNUNET_DHT_get_stop (t->dht_get_type);
1534 r = tunnel_destroy (t);
1539 /******************************************************************************/
1540 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1541 /******************************************************************************/
1544 * Function called to notify a client about the socket
1545 * being ready to queue more data. "buf" will be
1546 * NULL and "size" zero if the socket was closed for
1547 * writing in the meantime.
1549 * @param cls closure
1550 * @param size number of bytes available in buf
1551 * @param buf where the callee should write the message
1552 * @return number of bytes written to buf
1555 send_core_create_path (void *cls, size_t size, void *buf)
1557 struct MeshPathInfo *info = cls;
1558 struct GNUNET_MESH_ManipulatePath *msg;
1559 struct GNUNET_PeerIdentity *peer_ptr;
1560 struct MeshPeerInfo *peer = info->peer;
1561 struct MeshTunnel *t = info->t;
1562 struct MeshPeerPath *p = info->path;
1567 sizeof (struct GNUNET_MESH_ManipulatePath) +
1568 p->length * sizeof (struct GNUNET_PeerIdentity);
1570 if (size < size_needed || NULL == buf)
1572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
1573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
1574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
1576 info->peer->core_transmit[info->pos] =
1577 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1578 GNUNET_TIME_UNIT_FOREVER_REL,
1579 path_get_first_hop (t->tree, peer->id),
1581 &send_core_create_path,
1586 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1587 msg->header.size = htons (size_needed);
1588 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1589 msg->tid = ntohl (t->id.tid);
1591 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1592 for (i = 0; i < p->length; i++)
1594 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1601 "MESH: CREATE PATH (%u bytes long) sent!\n",
1609 * Function called to notify a client about the socket
1610 * being ready to queue more data. "buf" will be
1611 * NULL and "size" zero if the socket was closed for
1612 * writing in the meantime.
1614 * @param cls closure (MeshDataDescriptor with all info to build packet)
1615 * @param size number of bytes available in buf
1616 * @param buf where the callee should write the message
1617 * @return number of bytes written to buf
1620 send_core_data_to_origin (void *cls, size_t size, void *buf)
1622 struct MeshDataDescriptor *info = cls;
1623 struct GNUNET_MESH_ToOrigin *msg = buf;
1626 GNUNET_assert (NULL != info);
1627 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1628 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1630 if (total_size > size)
1632 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1633 "not enough buffer to send data to origin\n");
1636 msg->header.size = htons (total_size);
1637 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1638 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1639 msg->tid = htonl (info->origin->tid);
1640 if (0 != info->size)
1642 memcpy (&msg[1], &info[1], info->size);
1644 if (NULL != info->client)
1646 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1655 * Function called to notify a client about the socket
1656 * being ready to queue more data. "buf" will be
1657 * NULL and "size" zero if the socket was closed for
1658 * writing in the meantime.
1660 * @param cls closure (data itself)
1661 * @param size number of bytes available in buf
1662 * @param buf where the callee should write the message
1664 * @return number of bytes written to buf
1667 send_core_data_multicast (void *cls, size_t size, void *buf)
1669 struct MeshDataDescriptor *info = cls;
1670 struct GNUNET_MESH_Multicast *msg = buf;
1673 GNUNET_assert (NULL != info);
1674 GNUNET_assert (NULL != info->peer);
1675 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1676 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1678 if (total_size > size)
1681 struct GNUNET_PeerIdentity id;
1683 GNUNET_PEER_resolve(info->peer->id, &id);
1684 info->peer->infos[info->handler_n] = info;
1685 info->peer->types[info->handler_n] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1686 info->peer->core_transmit[info->handler_n] =
1687 GNUNET_CORE_notify_transmit_ready (core_handle,
1690 GNUNET_TIME_UNIT_FOREVER_REL,
1693 &send_core_data_multicast,
1697 info->peer->core_transmit[info->handler_n] = NULL;
1698 info->peer->infos[info->handler_n] = NULL;
1699 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1700 msg->header.size = htons (total_size);
1701 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1702 msg->tid = htonl (info->origin->tid);
1703 memcpy (&msg[1], info->data, info->size);
1704 if (0 == --(*info->copies))
1706 if (NULL != info->client)
1708 /* FIXME One unresponsive neighbor (who doesn't "call" tmt_rdy) can lock
1709 * the client from sending anything else to the service.
1710 * - Call receive_done after certain timeout.
1711 * - Here cancel the timeout.
1713 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1715 GNUNET_free (info->data);
1716 GNUNET_free (info->copies);
1724 * Function called to notify a client about the socket
1725 * being ready to queue more data. "buf" will be
1726 * NULL and "size" zero if the socket was closed for
1727 * writing in the meantime.
1729 * @param cls closure (MeshDataDescriptor)
1730 * @param size number of bytes available in buf
1731 * @param buf where the callee should write the message
1732 * @return number of bytes written to buf
1735 send_core_path_ack (void *cls, size_t size, void *buf)
1737 struct MeshDataDescriptor *info = cls;
1738 struct GNUNET_MESH_PathACK *msg = buf;
1740 GNUNET_assert (NULL != info);
1743 info->peer->core_transmit[info->handler_n] = NULL;
1745 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1750 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1751 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1752 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1753 msg->tid = htonl (info->origin->tid);
1754 msg->peer_id = my_full_id;
1756 /* TODO add signature */
1758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
1759 return sizeof (struct GNUNET_MESH_PathACK);
1764 * Function called to notify a client about the socket
1765 * being ready to queue more data. "buf" will be
1766 * NULL and "size" zero if the socket was closed for
1767 * writing in the meantime.
1769 * @param cls closure (data itself)
1770 * @param size number of bytes available in buf
1771 * @param buf where the callee should write the message
1772 * @return number of bytes written to buf
1775 send_core_data_raw (void *cls, size_t size, void *buf)
1777 struct GNUNET_MessageHeader *msg = cls;
1780 GNUNET_assert (NULL != msg);
1781 total_size = ntohs (msg->size);
1783 if (total_size > size)
1788 memcpy (buf, msg, total_size);
1796 * Send another peer a notification to destroy a tunnel
1797 * @param cls The tunnel to destroy
1798 * @param size Size in the buffer
1799 * @param buf Memory where to put the data to transmit
1800 * @return Size of data put in buffer
1803 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1805 struct MeshTunnel *t = cls;
1806 struct MeshClient *c;
1807 struct GNUNET_MESH_TunnelMessage *msg;
1811 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1812 /*FIXME*/ msg->header.size =
1813 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1814 msg->tunnel_id = htonl (t->id.tid);
1816 tunnel_destroy (c, t);
1817 return sizeof (struct GNUNET_MESH_TunnelMessage);
1822 /******************************************************************************/
1823 /******************** MESH NETWORK HANDLERS **************************/
1824 /******************************************************************************/
1828 * Core handler for path creation
1829 * struct GNUNET_CORE_MessageHandler
1831 * @param cls closure
1832 * @param message message
1833 * @param peer peer identity this notification is about
1834 * @param atsi performance data
1835 * @return GNUNET_OK to keep the connection open,
1836 * GNUNET_SYSERR to close it (signal serious error)
1840 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1841 const struct GNUNET_MessageHeader *message,
1842 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1844 unsigned int own_pos;
1847 MESH_TunnelNumber tid;
1848 struct GNUNET_MESH_ManipulatePath *msg;
1849 struct GNUNET_PeerIdentity *pi;
1850 GNUNET_HashCode hash;
1851 struct MeshPeerPath *path;
1852 struct MeshPeerInfo *dest_peer_info;
1853 struct MeshPeerInfo *orig_peer_info;
1854 struct MeshTunnel *t;
1856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1857 "MESH: Received a path create msg [%s]\n",
1858 GNUNET_i2s(&my_full_id));
1859 size = ntohs (message->size);
1860 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1862 GNUNET_break_op (0);
1866 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1867 if (size % sizeof (struct GNUNET_PeerIdentity))
1869 GNUNET_break_op (0);
1872 size /= sizeof (struct GNUNET_PeerIdentity);
1875 GNUNET_break_op (0);
1878 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1879 "MESH: path has %u hops.\n",
1881 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1883 tid = ntohl (msg->tid);
1884 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1885 t = tunnel_get (pi, tid);
1886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1887 "MESH: path is for tunnel %s [%X].\n",
1892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1893 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1894 t->id.oid = GNUNET_PEER_intern (pi);
1896 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1897 t->local_tid = next_local_tid++;
1898 /* FIXME test if taken */
1899 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
1900 t->tree = tree_new(t, t->id.oid);
1902 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1904 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1905 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1912 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1913 if (NULL == dest_peer_info)
1915 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1916 "MESH: Creating PeerInfo for destination.\n");
1917 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1918 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1919 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1921 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1923 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1924 if (NULL == orig_peer_info)
1926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1927 "MESH: Creating PeerInfo for origin.\n");
1928 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1929 orig_peer_info->id = GNUNET_PEER_intern (pi);
1930 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1931 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
1934 path = path_new (size);
1936 for (i = 0; i < size; i++)
1938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1939 "MESH: ... adding %s\n",
1940 GNUNET_i2s(&pi[i]));
1941 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1942 if (path->peers[i] == myid)
1945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1946 "MESH: Own position: %u\n", own_pos);
1949 /* cannot be self, must be 'not found' */
1950 /* create path: self not found in path through self */
1951 GNUNET_break_op (0);
1952 path_destroy (path);
1953 /* FIXME error. destroy tunnel? leave for timeout? */
1956 tunnel_add_path (t, path, own_pos);
1957 t->tree->me = tree_find_peer(t->tree->root, myid);
1958 if (own_pos == size - 1)
1960 /* It is for us! Send ack. */
1961 struct GNUNET_MESH_TunnelNotification cmsg;
1962 struct MeshDataDescriptor *info;
1965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1966 "MESH: It's for us!\n");
1967 path_add_to_origin (orig_peer_info, path);
1968 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1969 info->origin = &t->id;
1970 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1971 GNUNET_assert (NULL != info->peer);
1972 for (j = 0; info->peer->core_transmit[j]; j++)
1974 if (j == (CORE_QUEUE_SIZE - 1))
1980 info->handler_n = j;
1981 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
1982 info->peer->infos[j] = info;
1983 info->peer->core_transmit[j] =
1984 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1985 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1986 sizeof (struct GNUNET_MESH_PathACK),
1987 &send_core_path_ack, info);
1988 cmsg.header.size = htons(sizeof(cmsg));
1989 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1990 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
1991 cmsg.tunnel_id = htonl(t->local_tid);
1992 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
1996 struct MeshPeerPath *path2;
1998 /* It's for somebody else! Retransmit. */
1999 path2 = path_duplicate(path);
2000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2001 "MESH: Retransmitting.\n");
2002 path_add_to_peer(dest_peer_info, path);
2003 path = path_duplicate(path2);
2004 path_add_to_origin(orig_peer_info, path2);
2005 send_create_path(dest_peer_info, path, t);
2012 * Core handler for mesh network traffic going from the origin to a peer
2014 * @param cls closure
2015 * @param peer peer identity this notification is about
2016 * @param message message
2017 * @param atsi performance data
2018 * @return GNUNET_OK to keep the connection open,
2019 * GNUNET_SYSERR to close it (signal serious error)
2022 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2023 const struct GNUNET_MessageHeader *message,
2024 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2026 struct GNUNET_MESH_Unicast *msg;
2027 struct MeshTunnel *t;
2028 struct MeshPeerInfo *pi;
2031 size = ntohs (message->size);
2033 sizeof (struct GNUNET_MESH_Unicast) +
2034 sizeof (struct GNUNET_MessageHeader))
2039 msg = (struct GNUNET_MESH_Unicast *) message;
2040 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2043 /* TODO notify back: we don't know this tunnel */
2044 GNUNET_break_op (0);
2047 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2048 &msg->destination.hashPubKey);
2051 /* TODO maybe feedback, log to statistics */
2052 GNUNET_break_op (0);
2057 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2060 msg = GNUNET_malloc (size);
2061 memcpy (msg, message, size);
2062 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2063 GNUNET_TIME_UNIT_FOREVER_REL,
2064 path_get_first_hop (t->tree, pi->id),
2066 &send_core_data_raw, msg);
2072 * Core handler for mesh network traffic going from the origin to all peers
2074 * @param cls closure
2075 * @param message message
2076 * @param peer peer identity this notification is about
2077 * @param atsi performance data
2078 * @return GNUNET_OK to keep the connection open,
2079 * GNUNET_SYSERR to close it (signal serious error)
2081 * TODO: Check who we got this from, to validate route.
2084 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2085 const struct GNUNET_MessageHeader *message,
2086 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2088 struct GNUNET_MESH_Multicast *msg;
2089 struct GNUNET_PeerIdentity *id;
2090 struct MeshDataDescriptor *info;
2091 struct MeshTunnelTreeNode *n;
2092 struct MeshTunnel *t;
2093 unsigned int *copies;
2098 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Multicast);
2099 if (size < sizeof (struct GNUNET_MessageHeader))
2101 GNUNET_break_op (0);
2104 msg = (struct GNUNET_MESH_Multicast *) message;
2105 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2109 /* TODO notify that we dont know that tunnel */
2110 GNUNET_break_op (0);
2114 /* Transmit to locally interested clients */
2115 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2117 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2119 n = t->tree->me->children_head;
2122 copies = GNUNET_malloc (sizeof (unsigned int));
2123 for (*copies = 0; NULL != n; n = n->next)
2125 n = t->tree->me->children_head;
2126 data = GNUNET_malloc (size);
2127 memcpy (data, &msg[1], size);
2130 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2131 info->origin = &t->id;
2134 info->copies = copies;
2135 info->client = t->client->handle;
2136 info->destination = n->peer;
2137 id = path_get_first_hop(t->tree, n->peer);
2138 info->peer = peer_info_get(id);
2139 GNUNET_assert (NULL != info->peer);
2140 for (i = 0; NULL != info->peer->core_transmit[i]; i++)
2142 if (i == (CORE_QUEUE_SIZE - 1))
2148 info->handler_n = i;
2149 info->peer->infos[i] = info;
2150 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2151 info->peer->core_transmit[i] =
2152 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2153 GNUNET_TIME_UNIT_FOREVER_REL, id,
2154 ntohs (msg->header.size),
2155 &send_core_data_multicast, info);
2163 * Core handler for mesh network traffic
2165 * @param cls closure
2166 * @param message message
2167 * @param peer peer identity this notification is about
2168 * @param atsi performance data
2170 * @return GNUNET_OK to keep the connection open,
2171 * GNUNET_SYSERR to close it (signal serious error)
2174 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2175 const struct GNUNET_MessageHeader *message,
2176 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2178 struct GNUNET_MESH_ToOrigin *msg;
2179 struct GNUNET_PeerIdentity id;
2180 struct MeshPeerInfo *peer_info;
2181 struct MeshTunnel *t;
2184 size = ntohs (message->size);
2185 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2186 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2188 GNUNET_break_op (0);
2191 msg = (struct GNUNET_MESH_ToOrigin *) message;
2192 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2196 /* TODO notify that we dont know this tunnel (whom)? */
2200 if (t->id.oid == myid)
2202 if (NULL == t->client)
2204 /* got data packet for ownerless tunnel */
2205 GNUNET_break_op (0);
2208 /* TODO signature verification */
2209 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
2213 peer_info = peer_info_get (&msg->oid);
2214 if (NULL == peer_info)
2216 /* unknown origin of tunnel */
2220 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2221 msg = GNUNET_malloc (size);
2222 memcpy (msg, message, size);
2223 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2224 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2225 &send_core_data_raw, msg);
2232 * Core handler for path ACKs
2234 * @param cls closure
2235 * @param message message
2236 * @param peer peer identity this notification is about
2237 * @param atsi performance data
2239 * @return GNUNET_OK to keep the connection open,
2240 * GNUNET_SYSERR to close it (signal serious error)
2243 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2244 const struct GNUNET_MessageHeader *message,
2245 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2247 struct GNUNET_MESH_PathACK *msg;
2248 struct GNUNET_PeerIdentity id;
2249 struct MeshTunnelTreeNode *n;
2250 struct MeshPeerInfo *peer_info;
2251 struct MeshTunnel *t;
2253 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2254 "MESH: Received a path ACK msg [%s]\n",
2255 GNUNET_i2s(&my_full_id));
2256 msg = (struct GNUNET_MESH_PathACK *) message;
2257 t = tunnel_get (&msg->oid, msg->tid);
2260 /* TODO notify that we don't know the tunnel */
2264 /* Message for us? */
2265 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2268 "MESH: It's for us!\n");
2269 if (NULL == t->client)
2271 GNUNET_break_op (0);
2274 peer_info = peer_info_get (&msg->peer_id);
2275 if (NULL == peer_info)
2277 GNUNET_break_op (0);
2280 n = tree_find_peer(t->tree->root, peer_info->id);
2283 GNUNET_break_op (0);
2286 n->status = MESH_PEER_READY;
2287 send_client_peer_connected(t, peer_info->id);
2291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2292 "MESH: not for us, retransmitting...\n");
2293 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2294 peer_info = peer_info_get (&msg->oid);
2295 if (NULL == peer_info)
2297 /* If we know the tunnel, we should DEFINITELY know the peer */
2301 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2302 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2303 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2304 GNUNET_TIME_UNIT_FOREVER_REL,
2306 sizeof (struct GNUNET_MESH_PathACK),
2307 &send_core_data_raw, msg);
2313 * Functions to handle messages from core
2315 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2316 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2317 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2318 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2319 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2320 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2321 sizeof (struct GNUNET_MESH_PathACK)},
2327 /******************************************************************************/
2328 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2329 /******************************************************************************/
2332 * deregister_app: iterator for removing each application registered by a client
2334 * @param cls closure
2335 * @param key the hash of the application id (used to access the hashmap)
2336 * @param value the value stored at the key (client)
2338 * @return GNUNET_OK on success
2341 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2343 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2349 * notify_client_connection_failure: notify a client that the connection to the
2350 * requested remote peer is not possible (for instance, no route found)
2351 * Function called when the socket is ready to queue more data. "buf" will be
2352 * NULL and "size" zero if the socket was closed for writing in the meantime.
2354 * @param cls closure
2355 * @param size number of bytes available in buf
2356 * @param buf where the callee should write the message
2357 * @return number of bytes written to buf
2360 notify_client_connection_failure (void *cls, size_t size, void *buf)
2363 struct MeshPeerInfo *peer_info;
2364 struct GNUNET_MESH_PeerControl *msg;
2365 struct GNUNET_PeerIdentity id;
2367 if (0 == size && NULL == buf)
2369 // TODO retry? cancel?
2373 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2374 peer_info = (struct MeshPeerInfo *) cls;
2375 msg = (struct GNUNET_MESH_PeerControl *) buf;
2376 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2377 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2378 // msg->tunnel_id = htonl(peer_info->t->tid);
2379 GNUNET_PEER_resolve (peer_info->id, &id);
2380 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2388 * Send keepalive packets for a peer
2390 * @param cls Closure (tunnel for which to send the keepalive).
2391 * @param tc Notification context.
2393 * TODO: implement explicit multicast keepalive?
2396 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2398 struct MeshTunnel *t = cls;
2399 struct GNUNET_MessageHeader *payload;
2400 struct GNUNET_MESH_Multicast *msg;
2403 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2404 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2410 "MESH: sending keepalive for tunnel %d\n",
2413 size = sizeof(struct GNUNET_MESH_Multicast) +
2414 sizeof(struct GNUNET_MessageHeader);
2415 msg = GNUNET_malloc (size);
2416 msg->header.size = htons (size);
2417 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2418 msg->oid = my_full_id;
2419 msg->tid = htonl(t->id.tid);
2420 payload = (struct GNUNET_MessageHeader *) &msg[1];
2421 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2422 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2423 handle_mesh_data_multicast (NULL, &my_full_id, &msg->header, NULL);
2426 t->path_refresh_task =
2427 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
2433 * Function to process paths received for a new peer addition. The recorded
2434 * paths form the initial tunnel, which can be optimized later.
2435 * Called on each result obtained for the DHT search.
2437 * @param cls closure
2438 * @param exp when will this value expire
2439 * @param key key of the result
2440 * @param type type of the result
2441 * @param size number of bytes in data
2442 * @param data pointer to the result data
2444 * TODO: re-issue the request after certain time? cancel after X results?
2447 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2448 const GNUNET_HashCode * key,
2449 const struct GNUNET_PeerIdentity *get_path,
2450 unsigned int get_path_length,
2451 const struct GNUNET_PeerIdentity *put_path,
2452 unsigned int put_path_length,
2453 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2455 struct MeshPathInfo *path_info = cls;
2456 struct MeshPeerPath *p;
2457 struct GNUNET_PeerIdentity pi;
2460 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2461 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2462 "MESH: Got results from DHT for %s\n",
2463 GNUNET_h2s_full(&pi.hashPubKey));
2464 GNUNET_DHT_get_stop(path_info->peer->dhtget);
2465 path_info->peer->dhtget = NULL;
2467 p = path_build_from_dht (get_path, get_path_length,
2468 put_path, put_path_length);
2469 path_add_to_peer (path_info->peer, p);
2470 for (i = 0; i < path_info->peer->ntunnels; i++)
2472 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2473 peer_info_connect(path_info->peer, path_info->t);
2475 GNUNET_free (path_info);
2482 * Function to process paths received for a new peer addition. The recorded
2483 * paths form the initial tunnel, which can be optimized later.
2484 * Called on each result obtained for the DHT search.
2486 * @param cls closure
2487 * @param exp when will this value expire
2488 * @param key key of the result
2489 * @param type type of the result
2490 * @param size number of bytes in data
2491 * @param data pointer to the result data
2494 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2495 const GNUNET_HashCode * key,
2496 const struct GNUNET_PeerIdentity *get_path,
2497 unsigned int get_path_length,
2498 const struct GNUNET_PeerIdentity *put_path,
2499 unsigned int put_path_length,
2500 enum GNUNET_BLOCK_Type type, size_t size,
2503 const struct GNUNET_PeerIdentity *pi = data;
2504 struct GNUNET_PeerIdentity id;
2505 struct MeshTunnel *t = cls;
2506 struct MeshPeerInfo *peer_info;
2507 struct MeshPathInfo *path_info;
2508 struct MeshPeerPath *p;
2511 if (size != sizeof (struct GNUNET_PeerIdentity))
2513 GNUNET_break_op (0);
2516 GNUNET_assert (NULL != t->client);
2517 GNUNET_DHT_get_stop (t->dht_get_type);
2518 t->dht_get_type = NULL;
2519 peer_info = peer_info_get (pi);
2520 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2521 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2523 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2524 NULL == peer_info->dhtget)
2526 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2527 path_info->peer = peer_info;
2529 /* we don't have a route to the peer, let's try a direct lookup */
2531 GNUNET_DHT_get_start (dht_handle, /* handle */
2532 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2533 GNUNET_BLOCK_TYPE_TEST, /* block type */
2534 &pi->hashPubKey, /* key to look up */
2535 10U, /* replication level */
2536 GNUNET_DHT_RO_RECORD_ROUTE |
2537 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2538 /* option to dht: record route */
2540 0, /* xquery bits */
2541 dht_get_id_handler, /* callback */
2542 path_info); /* closure */
2546 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2547 path_add_to_peer (peer_info, p);
2548 tunnel_add_peer(t, peer_info);
2549 p = tree_get_path_to_peer(t->tree, peer_info->id);
2551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2552 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2553 t->local_tid, p->length);
2554 for (i = 0; i < p->length; i++)
2556 GNUNET_PEER_resolve (p->peers[0], &id);
2557 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2558 GNUNET_h2s_full (&id.hashPubKey));
2564 send_create_path(peer_info, p, t);
2568 send_client_peer_connected(t, myid);
2572 /******************************************************************************/
2573 /********************* MESH LOCAL HANDLES **************************/
2574 /******************************************************************************/
2578 * Handler for client disconnection
2580 * @param cls closure
2581 * @param client identification of the client; NULL
2582 * for the last call when the server is destroyed
2585 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2587 struct MeshClient *c;
2588 struct MeshClient *next;
2590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2596 if (c->handle != client && NULL != client)
2598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2603 if (NULL != c->tunnels)
2605 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2606 &tunnel_destroy_iterator,
2608 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2611 /* deregister clients applications */
2612 if (NULL != c->apps)
2614 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2615 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2617 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2618 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2620 GNUNET_SCHEDULER_cancel (announce_applications_task);
2621 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2623 if (NULL != c->types)
2624 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2625 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2637 * Handler for new clients
2639 * @param cls closure
2640 * @param client identification of the client
2641 * @param message the actual message, which includes messages the client wants
2644 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2645 const struct GNUNET_MessageHeader *message)
2647 struct GNUNET_MESH_ClientConnect *cc_msg;
2648 struct MeshClient *c;
2649 GNUNET_MESH_ApplicationType *a;
2656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2657 /* Check data sanity */
2658 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2659 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2660 ntypes = ntohs (cc_msg->types);
2661 napps = ntohs (cc_msg->applications);
2663 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2666 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2670 /* Create new client structure */
2671 c = GNUNET_malloc (sizeof (struct MeshClient));
2673 c->id = next_client_id++;
2676 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2679 GNUNET_MESH_ApplicationType at;
2682 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2683 for (i = 0; i < napps; i++)
2686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2687 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2688 /* store in clients hashmap */
2689 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2690 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2691 /* store in global hashmap, for announcements */
2692 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2693 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2695 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2696 announce_applications_task =
2697 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2705 t = (uint16_t *) & a[napps];
2706 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2707 for (i = 0; i < ntypes; i++)
2710 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2712 /* store in clients hashmap */
2713 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2714 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2715 /* store in global hashmap */
2716 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2717 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2721 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2723 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2724 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2725 GNUNET_SERVER_notification_context_add (nc, client);
2727 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2729 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2735 * Handler for requests of new tunnels
2737 * @param cls closure
2738 * @param client identification of the client
2739 * @param message the actual message
2742 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2743 const struct GNUNET_MessageHeader *message)
2745 struct GNUNET_MESH_TunnelMessage *t_msg;
2746 struct MeshTunnel *t;
2747 struct MeshClient *c;
2748 GNUNET_HashCode hash;
2750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2752 /* Sanity check for client registration */
2753 if (NULL == (c = client_get (client)))
2756 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2763 /* Message sanity check */
2764 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2767 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2771 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2772 /* Sanity check for tunnel numbering */
2773 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2776 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2779 /* Sanity check for duplicate tunnel IDs */
2780 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2783 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2787 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2789 while (NULL != tunnel_get_by_pi (myid, next_tid))
2790 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2791 t->id.tid = next_tid++;
2793 t->local_tid = ntohl (t_msg->tunnel_id);
2795 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2797 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2799 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2800 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2803 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2807 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2809 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2810 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2813 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2816 t->tree = tree_new (t, myid);
2817 t->tree->refresh = REFRESH_PATH_TIME;
2818 t->tree->root->status = MESH_PEER_READY;
2819 t->tree->me = t->tree->root;
2821 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2827 * Handler for requests of deleting tunnels
2829 * @param cls closure
2830 * @param client identification of the client
2831 * @param message the actual message
2834 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2835 const struct GNUNET_MessageHeader *message)
2837 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2838 struct MeshClient *c;
2839 struct MeshTunnel *t;
2840 MESH_TunnelNumber tid;
2841 GNUNET_HashCode hash;
2843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2845 /* Sanity check for client registration */
2846 if (NULL == (c = client_get (client)))
2849 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2852 /* Message sanity check */
2853 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2856 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2860 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2862 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2864 /* Retrieve tunnel */
2865 tid = ntohl (tunnel_msg->tunnel_id);
2867 /* Remove from local id hashmap */
2868 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2869 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2870 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2872 /* Remove from global id hashmap */
2873 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2874 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2876 // notify_tunnel_destroy(t); FIXME
2878 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2884 * Handler for connection requests to new peers
2886 * @param cls closure
2887 * @param client identification of the client
2888 * @param message the actual message (PeerControl)
2891 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2892 const struct GNUNET_MessageHeader *message)
2894 struct GNUNET_MESH_PeerControl *peer_msg;
2895 struct MeshPeerInfo *peer_info;
2896 struct MeshClient *c;
2897 struct MeshTunnel *t;
2898 MESH_TunnelNumber tid;
2900 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
2901 /* Sanity check for client registration */
2902 if (NULL == (c = client_get (client)))
2905 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2909 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2910 /* Sanity check for message size */
2911 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2914 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2918 /* Tunnel exists? */
2919 tid = ntohl (peer_msg->tunnel_id);
2920 t = tunnel_get_by_local_id (c, tid);
2924 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2928 /* Does client own tunnel? */
2929 if (t->client->handle != client)
2932 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2935 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
2936 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
2937 peer_info = peer_info_get (&peer_msg->peer);
2939 tunnel_add_peer(t, peer_info);
2940 peer_info_connect(peer_info, t);
2942 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2948 * Handler for disconnection requests of peers in a tunnel
2950 * @param cls closure
2951 * @param client identification of the client
2952 * @param message the actual message (PeerControl)
2955 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2956 const struct GNUNET_MessageHeader *message)
2958 struct GNUNET_MESH_PeerControl *peer_msg;
2959 struct MeshClient *c;
2960 struct MeshTunnel *t;
2961 MESH_TunnelNumber tid;
2963 /* Sanity check for client registration */
2964 if (NULL == (c = client_get (client)))
2967 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2970 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2971 /* Sanity check for message size */
2972 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2975 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2979 /* Tunnel exists? */
2980 tid = ntohl (peer_msg->tunnel_id);
2981 t = tunnel_get_by_local_id (c, tid);
2985 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2989 /* Does client own tunnel? */
2990 if (t->client->handle != client)
2993 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2997 /* Ok, delete peer from tunnel */
2998 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2999 &peer_msg->peer.hashPubKey);
3001 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3007 * Handler for connection requests to new peers by type
3009 * @param cls closure
3010 * @param client identification of the client
3011 * @param message the actual message (ConnectPeerByType)
3014 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3015 const struct GNUNET_MessageHeader *message)
3017 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3018 struct MeshClient *c;
3019 struct MeshTunnel *t;
3020 GNUNET_HashCode hash;
3021 MESH_TunnelNumber tid;
3023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3024 /* Sanity check for client registration */
3025 if (NULL == (c = client_get (client)))
3028 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3032 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3033 /* Sanity check for message size */
3034 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3035 ntohs (connect_msg->header.size))
3038 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3042 /* Tunnel exists? */
3043 tid = ntohl (connect_msg->tunnel_id);
3044 t = tunnel_get_by_local_id (c, tid);
3048 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3052 /* Does client own tunnel? */
3053 if (t->client->handle != client)
3056 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3060 /* Do WE have the service? */
3061 t->type = ntohl (connect_msg->type);
3062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3063 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3064 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3067 /* Yes! Fast forward, add ourselves to the tunnel and send the
3068 * good news to the client
3070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3071 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3072 peer_info_get (&my_full_id),
3073 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3076 send_client_peer_connected(t, myid);
3077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3078 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3081 /* Ok, lets find a peer offering the service */
3082 if (NULL != t->dht_get_type)
3084 GNUNET_DHT_get_stop (t->dht_get_type);
3086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3087 GNUNET_h2s_full (&hash));
3089 GNUNET_DHT_get_start (dht_handle,
3090 GNUNET_TIME_UNIT_FOREVER_REL,
3091 GNUNET_BLOCK_TYPE_TEST,
3094 GNUNET_DHT_RO_RECORD_ROUTE |
3095 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3097 &dht_get_type_handler, t);
3099 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3105 * Handler for client traffic directed to one peer
3107 * @param cls closure
3108 * @param client identification of the client
3109 * @param message the actual message
3112 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3113 const struct GNUNET_MessageHeader *message)
3115 struct MeshClient *c;
3116 struct MeshTunnel *t;
3117 struct MeshPeerInfo *pi;
3118 struct GNUNET_MESH_Unicast *data_msg;
3119 MESH_TunnelNumber tid;
3122 /* Sanity check for client registration */
3123 if (NULL == (c = client_get (client)))
3126 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3129 data_msg = (struct GNUNET_MESH_Unicast *) message;
3130 /* Sanity check for message size */
3131 size = ntohs (message->size);
3132 if (sizeof (struct GNUNET_MESH_Unicast) +
3133 sizeof (struct GNUNET_MessageHeader) > size)
3136 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3140 /* Tunnel exists? */
3141 tid = ntohl (data_msg->tid);
3142 t = tunnel_get_by_local_id (c, tid);
3146 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3150 /* Is it a local tunnel? Then, does client own the tunnel? */
3151 if (t->client->handle != NULL && t->client->handle != client)
3154 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3158 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3159 &data_msg->destination.hashPubKey);
3160 /* Is the selected peer in the tunnel? */
3164 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3168 /* Ok, everything is correct, send the message
3169 * (pretend we got it from a mesh peer)
3172 char buf[ntohs (message->size)];
3173 struct GNUNET_MESH_Unicast *copy;
3175 /* Work around const limitation */
3176 copy = (struct GNUNET_MESH_Unicast *) buf;
3177 memcpy (buf, data_msg, size);
3178 copy->oid = my_full_id;
3179 copy->tid = htonl (t->id.tid);
3180 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL);
3182 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3187 * Handler for client traffic directed to all peers in a tunnel
3189 * @param cls closure
3190 * @param client identification of the client
3191 * @param message the actual message
3194 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3195 const struct GNUNET_MessageHeader *message)
3197 struct MeshClient *c;
3198 struct MeshTunnel *t;
3199 struct GNUNET_MESH_Multicast *data_msg;
3200 MESH_TunnelNumber tid;
3202 /* Sanity check for client registration */
3203 if (NULL == (c = client_get (client)))
3206 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3209 data_msg = (struct GNUNET_MESH_Multicast *) message;
3210 /* Sanity check for message size */
3211 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3214 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3218 /* Tunnel exists? */
3219 tid = ntohl (data_msg->tid);
3220 t = tunnel_get_by_local_id (c, tid);
3224 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3228 /* Does client own tunnel? */
3229 if (t->client->handle != client)
3232 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3237 char buf[ntohs(message->size)];
3238 struct GNUNET_MESH_Multicast *copy;
3240 copy = (struct GNUNET_MESH_Multicast *)buf;
3241 memcpy(buf, message, ntohs(message->size));
3242 copy->oid = my_full_id;
3243 copy->tid = htonl(t->id.tid);
3244 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL);
3247 /* receive done gets called when last copy is sent */
3252 * Functions to handle messages from clients
3254 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3255 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3256 {&handle_local_tunnel_create, NULL,
3257 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3258 sizeof (struct GNUNET_MESH_TunnelMessage)},
3259 {&handle_local_tunnel_destroy, NULL,
3260 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3261 sizeof (struct GNUNET_MESH_TunnelMessage)},
3262 {&handle_local_connect_add, NULL,
3263 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3264 sizeof (struct GNUNET_MESH_PeerControl)},
3265 {&handle_local_connect_del, NULL,
3266 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3267 sizeof (struct GNUNET_MESH_PeerControl)},
3268 {&handle_local_connect_by_type, NULL,
3269 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3270 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3271 {&handle_local_unicast, NULL,
3272 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3273 {&handle_local_unicast, NULL,
3274 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3275 {&handle_local_multicast, NULL,
3276 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3282 * To be called on core init/fail.
3284 * @param cls service closure
3285 * @param server handle to the server for this service
3286 * @param identity the public identity of this peer
3289 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3290 const struct GNUNET_PeerIdentity *identity)
3292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3293 core_handle = server;
3294 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3296 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3297 GNUNET_SCHEDULER_shutdown();
3303 * Method called whenever a given peer connects.
3305 * @param cls closure
3306 * @param peer peer identity this notification is about
3307 * @param atsi performance data for the connection
3310 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3311 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3313 struct MeshPeerInfo *peer_info;
3314 struct MeshPeerPath *path;
3316 #if MESH_DEBUG_CONNECTION
3317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3319 GNUNET_h2s(&my_full_id.hashPubKey));
3321 peer_info = peer_info_get (peer);
3322 if (myid == peer_info->id)
3324 #if MESH_DEBUG_CONNECTION
3325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3329 #if MESH_DEBUG_CONNECTION
3332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3333 GNUNET_h2s(&peer->hashPubKey));
3336 path = path_new (2);
3337 path->peers[0] = myid;
3338 path->peers[1] = peer_info->id;
3339 GNUNET_PEER_change_rc(myid, 1);
3340 GNUNET_PEER_change_rc(peer_info->id, 1);
3341 path_add_to_peer (peer_info, path);
3346 * Method called whenever a peer disconnects.
3348 * @param cls closure
3349 * @param peer peer identity this notification is about
3352 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3354 struct MeshPeerInfo *pi;
3357 #if MESH_DEBUG_CONNECTION
3358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3360 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3366 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3368 peer_info_cancel_transmission(pi, i);
3370 path_remove_from_peer (pi, pi->id, myid);
3371 #if MESH_DEBUG_CONNECTION
3374 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3381 /******************************************************************************/
3382 /************************ MAIN FUNCTIONS ****************************/
3383 /******************************************************************************/
3386 * Iterator over hash map entries.
3388 * @param cls closure
3389 * @param key current key code
3390 * @param value value in the hash map
3391 * @return GNUNET_YES if we should continue to
3396 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
3398 struct MeshTunnel *t = value;
3404 * Task run during shutdown.
3410 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3413 /* TODO: destroy tunnels? */
3414 if (core_handle != NULL)
3416 GNUNET_CORE_disconnect (core_handle);
3419 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
3420 if (dht_handle != NULL)
3422 GNUNET_DHT_disconnect (dht_handle);
3427 GNUNET_SERVER_notification_context_destroy (nc);
3430 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3432 GNUNET_SCHEDULER_cancel (announce_id_task);
3433 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3439 * Process mesh requests.
3441 * @param cls closure
3442 * @param server the initialized server
3443 * @param c configuration to use
3446 run (void *cls, struct GNUNET_SERVER_Handle *server,
3447 const struct GNUNET_CONFIGURATION_Handle *c)
3449 struct MeshPeerInfo *peer;
3450 struct MeshPeerPath *p;
3453 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3454 server_handle = server;
3455 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3456 CORE_QUEUE_SIZE, /* queue size */
3457 NULL, /* Closure passed to MESH functions */
3458 &core_init, /* Call core_init once connected */
3459 &core_connect, /* Handle connects */
3460 &core_disconnect, /* remove peers on disconnects */
3461 NULL, /* Don't notify about all incoming messages */
3462 GNUNET_NO, /* For header only in notification */
3463 NULL, /* Don't notify about all outbound messages */
3464 GNUNET_NO, /* For header-only out notification */
3465 core_handlers); /* Register these handlers */
3466 if (core_handle == NULL)
3469 GNUNET_SCHEDULER_shutdown ();
3474 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3477 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3479 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3480 GNUNET_SCHEDULER_shutdown ();
3483 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3484 GNUNET_free (keyfile);
3485 if (my_private_key == NULL)
3487 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3488 _("Mesh service could not access hostkey. Exiting.\n"));
3489 GNUNET_SCHEDULER_shutdown ();
3492 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3493 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3494 &my_full_id.hashPubKey);
3495 myid = GNUNET_PEER_intern (&my_full_id);
3497 dht_handle = GNUNET_DHT_connect (c, 64);
3498 if (dht_handle == NULL)
3504 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3506 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3507 peers = GNUNET_CONTAINER_multihashmap_create (32);
3508 applications = GNUNET_CONTAINER_multihashmap_create (32);
3509 types = GNUNET_CONTAINER_multihashmap_create (32);
3511 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3512 nc = GNUNET_SERVER_notification_context_create (server_handle,
3514 GNUNET_SERVER_disconnect_notify (server_handle,
3515 &handle_local_client_disconnect,
3520 clients_tail = NULL;
3525 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3526 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3528 /* Create a peer_info for the local peer */
3529 peer = peer_info_get(&my_full_id);
3532 path_add_to_peer(peer, p);
3534 /* Scheduled the task to clean up when shutdown is called */
3535 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3542 * The main function for the mesh service.
3544 * @param argc number of arguments from the command line
3545 * @param argv command line arguments
3546 * @return 0 ok, 1 on error
3549 main (int argc, char *const *argv)
3554 // fprintf (stderr, "main ()\n");
3556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3559 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3563 // fprintf (stderr, "main () END\n");