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.
10 GNUnet is distributed in the hope that it will be useful, but
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 above
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;
327 * Struct containing information about a client of the service
334 struct MeshClient *next;
335 struct MeshClient *prev;
338 * Tunnels that belong to this client, indexed by local id
340 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
343 * Handle to communicate with the client
345 struct GNUNET_SERVER_Client *handle;
348 * Applications that this client has claimed to provide
350 struct GNUNET_CONTAINER_MultiHashMap *apps;
353 * Messages that this client has declared interest in
355 struct GNUNET_CONTAINER_MultiHashMap *types;
359 * ID of the client, for debug messages
368 /******************************************************************************/
369 /************************ DEBUG FUNCTIONS ****************************/
370 /******************************************************************************/
374 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
375 * @param cls string to print
376 * @param tc task context
379 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
383 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
391 /******************************************************************************/
392 /*********************** GLOBAL VARIABLES ****************************/
393 /******************************************************************************/
398 static struct MeshClient *clients;
399 static struct MeshClient *clients_tail;
402 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
404 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
407 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
409 static struct GNUNET_CONTAINER_MultiHashMap *peers;
412 * Handle to communicate with core
414 static struct GNUNET_CORE_Handle *core_handle;
419 static struct GNUNET_DHT_Handle *dht_handle;
424 static struct GNUNET_SERVER_Handle *server_handle;
427 * Notification context, to send messages to local clients
429 static struct GNUNET_SERVER_NotificationContext *nc;
432 * Local peer own ID (memory efficient handle)
434 static GNUNET_PEER_Id myid;
437 * Local peer own ID (full value)
439 static struct GNUNET_PeerIdentity my_full_id;
444 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
449 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
452 * Tunnel ID for the next created tunnel (global tunnel number)
454 static MESH_TunnelNumber next_tid;
457 * Tunnel ID for the next incoming tunnel (local tunnel number)
459 static MESH_TunnelNumber next_local_tid;
462 * All application types provided by this peer
464 static struct GNUNET_CONTAINER_MultiHashMap *applications;
467 * All message types clients of this peer are interested in
469 static struct GNUNET_CONTAINER_MultiHashMap *types;
472 * Task to periodically announce provided applications
474 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
477 * Task to periodically announce itself in the network
479 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
482 unsigned int next_client_id;
486 /******************************************************************************/
487 /************************ ITERATORS ****************************/
488 /******************************************************************************/
490 /* FIXME move iterators here */
493 /******************************************************************************/
494 /************************ PERIODIC FUNCTIONS ****************************/
495 /******************************************************************************/
498 * Announce iterator over for each application provided by the peer
501 * @param key current key code
502 * @param value value in the hash map
503 * @return GNUNET_YES if we should continue to
508 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
510 /* FIXME are hashes in multihash map equal on all aquitectures? */
511 GNUNET_DHT_put (dht_handle,
514 GNUNET_DHT_RO_RECORD_ROUTE |
515 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
516 GNUNET_BLOCK_TYPE_TEST,
517 sizeof (struct GNUNET_PeerIdentity),
518 (const char *) &my_full_id,
520 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
521 &mesh_debug, "DHT_put for app completed");
523 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
525 APP_ANNOUNCE_TIME, NULL, NULL);
532 * Periodically announce what applications are provided by local clients
535 * @param tc task context
538 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
540 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
542 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
545 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
546 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
548 announce_applications_task =
549 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
557 * Periodically announce self id in the DHT
560 * @param tc task context
563 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
565 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
567 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
571 * - Set data expiration in function of X
574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
575 GNUNET_h2s_full (&my_full_id.hashPubKey));
576 GNUNET_DHT_put (dht_handle, /* DHT handle */
577 &my_full_id.hashPubKey, /* Key to use */
578 10U, /* Replication level */
579 GNUNET_DHT_RO_RECORD_ROUTE |
580 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
581 GNUNET_BLOCK_TYPE_TEST, /* Block type */
582 sizeof(my_full_id), /* Size of the data */
583 (char *)&my_full_id, /* Data itself */
584 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
585 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
587 &mesh_debug, "DHT_put for id completed");
589 NULL, /* Continuation */
590 NULL); /* Continuation closure */
593 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
598 * Function to process paths received for a new peer addition. The recorded
599 * paths form the initial tunnel, which can be optimized later.
600 * Called on each result obtained for the DHT search.
603 * @param exp when will this value expire
604 * @param key key of the result
605 * @param type type of the result
606 * @param size number of bytes in data
607 * @param data pointer to the result data
610 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
611 const GNUNET_HashCode * key,
612 const struct GNUNET_PeerIdentity *get_path,
613 unsigned int get_path_length,
614 const struct GNUNET_PeerIdentity *put_path,
615 unsigned int put_path_length,
616 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
619 /******************************************************************************/
620 /****************** GENERAL HELPER FUNCTIONS ************************/
621 /******************************************************************************/
624 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
625 * and insert it in the appropiate structures if the peer is not known yet.
627 * @param peer Identity of the peer
629 * @return Existing or newly created peer info
631 static struct MeshPeerInfo *
632 peer_info_get (const struct GNUNET_PeerIdentity *peer)
634 struct MeshPeerInfo *peer_info;
636 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
637 if (NULL == peer_info)
640 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
641 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
642 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
643 peer_info->id = GNUNET_PEER_intern (peer);
652 * Destroy the peer_info and free any allocated resources linked to it
653 * @param t tunnel the path belongs to
654 * @param pi the peer_info to destroy
655 * @return GNUNET_OK on success
658 peer_info_destroy (struct MeshPeerInfo *pi)
660 GNUNET_HashCode hash;
661 struct GNUNET_PeerIdentity id;
663 GNUNET_PEER_resolve (pi->id, &id);
664 GNUNET_PEER_change_rc (pi->id, -1);
665 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
667 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
668 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
676 * Notify a tunnel that a connection has broken that affects at least
679 * @param t Tunnel affected.
680 * @param peer Peer that (at least) has been affected by the disconnection.
681 * @param p1 Peer that got disconnected from p2.
682 * @param p2 Peer that got disconnected from p1.
684 * @return Short ID of the peer disconnected (either p1 or p2).
685 * 0 if the tunnel remained unaffected.
687 static GNUNET_PEER_Id
688 tunnel_notify_connection_broken (struct MeshTunnel *t,
689 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
693 * Remove all paths that rely on a direct connection between p1 and p2
694 * from the peer itself and notify all tunnels about it.
696 * @param peer PeerInfo of affected peer.
697 * @param p1 GNUNET_PEER_Id of one peer.
698 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
701 * TODO: optimize (see below)
704 path_remove_from_peer (struct MeshPeerInfo *peer,
708 struct GNUNET_PeerIdentity id;
709 struct MeshPeerPath *p;
710 struct MeshPeerPath *aux;
711 struct MeshPeerInfo *peer_d;
713 unsigned int destroyed;
723 for (i = 0; i < (p->length - 1); i++)
725 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
726 (p->peers[i] == p2 && p->peers[i + 1] == p1))
738 for (i = 0; i < peer->ntunnels; i++)
740 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
742 * Problem: one or more peers have been deleted from the tunnel tree.
743 * We don't know who they are to try to add them again.
744 * We need to try to find a new path for each of the disconnected peers.
745 * Some of them might already have a path to reach them that does not
746 * involve p1 and p2. Adding all anew might render in a better tree than
747 * the trivial immediate fix.
749 * Trivial immiediate fix: try to reconnect to the disconnected node. All
750 * its children will be reachable trough him.
752 GNUNET_PEER_resolve(d, &id);
753 peer_d = peer_info_get(&id);
756 for (p = peer_d->path_head; NULL != p; p = p->next)
758 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
766 /* No callback, as peer will be already disconnected */
767 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
771 struct MeshPathInfo *path_info;
773 if (NULL != peer_d->dhtget)
775 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
777 path_info->peer = peer_d;
778 path_info->t = peer->tunnels[i];
780 GNUNET_DHT_get_start(dht_handle, /* handle */
781 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
782 GNUNET_BLOCK_TYPE_TEST, /* type */
783 &id.hashPubKey, /*key to search */
784 4, /* replication level */
785 GNUNET_DHT_RO_RECORD_ROUTE |
786 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
797 * Add the path to the peer and update the path used to reach it in case this
800 * @param peer_info Destination peer to add the path to.
801 * @param path New path to add. Last peer must be the peer in arg 1.
802 * Path will be either used of freed if already known.
804 * TODO: trim the part from origin to us? Add it as path to origin?
807 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
809 struct MeshPeerPath *aux;
813 if (NULL == peer_info || NULL == path)
819 l = path_get_length (path);
821 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
823 l2 = path_get_length (aux);
826 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
827 peer_info->path_tail, aux, path);
831 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
838 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
845 * Add the path to the origin peer and update the path used to reach it in case
846 * this is the shortest.
847 * The path is given in peer_info -> destination, therefore we turn the path
850 * @param peer_info Peer to add the path to, being the origin of the path.
851 * @param path New path to add after being inversed.
854 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
857 path_add_to_peer (peer_info, path);
862 * Build a PeerPath from the paths returned from the DHT, reversing the paths
863 * to obtain a local peer -> destination path and interning the peer ids.
865 * @return Newly allocated and created path
867 static struct MeshPeerPath *
868 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
869 unsigned int get_path_length,
870 const struct GNUNET_PeerIdentity *put_path,
871 unsigned int put_path_length)
873 struct MeshPeerPath *p;
879 GNUNET_PEER_change_rc(myid, 1);
881 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
882 for (i--; i >= 0; i--)
884 id = GNUNET_PEER_intern (&get_path[i]);
885 if (p->length > 0 && id == p->peers[p->length - 1])
887 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
888 GNUNET_PEER_change_rc(id, -1);
893 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
894 p->peers[p->length] = id;
898 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
899 for (i--; i >= 0; i--)
901 id = GNUNET_PEER_intern (&put_path[i]);
904 /* PUT path went through us, so discard the path up until now and start
905 * from here to get a much shorter (and loop-free) path.
910 if (p->length > 0 && id == p->peers[p->length - 1])
912 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
913 GNUNET_PEER_change_rc(id, -1);
918 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
919 p->peers[p->length] = id;
923 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
924 "MESH: (first of GET: %s)\n",
925 GNUNET_h2s_full(&get_path[0].hashPubKey));
926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
927 "MESH: (first of PUT: %s)\n",
928 GNUNET_h2s_full(&put_path[0].hashPubKey));
929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
930 "MESH: In total: %d hops\n",
938 * Send keepalive packets for a peer
940 * @param cls Closure (tunnel for which to send the keepalive).
941 * @param tc Notification context.
943 * TODO: implement explicit multicast keepalive?
946 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
950 * Check if client has registered with the service and has not disconnected
952 * @param client the client to check
954 * @return non-NULL if client exists in the global DLL
956 static struct MeshClient *
957 client_get (struct GNUNET_SERVER_Client *client)
959 struct MeshClient *c;
964 if (c->handle == client)
973 * Checks if a given client has subscribed to certain message type
975 * @param message_type Type of message to check
976 * @param c Client to check
978 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
983 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
987 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
988 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
993 * Search for a tunnel among the tunnels for a client
995 * @param c the client whose tunnels to search in
996 * @param tid the local id of the tunnel
998 * @return tunnel handler, NULL if doesn't exist
1000 static struct MeshTunnel *
1001 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1003 GNUNET_HashCode hash;
1005 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1006 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1011 * Search for a tunnel by global ID using PEER_ID
1013 * @param pi owner of the tunnel
1014 * @param tid global tunnel number
1016 * @return tunnel handler, NULL if doesn't exist
1018 static struct MeshTunnel *
1019 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1021 struct MESH_TunnelID id;
1022 GNUNET_HashCode hash;
1027 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1028 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1033 * Search for a tunnel by global ID using full PeerIdentities
1035 * @param oid owner of the tunnel
1036 * @param tid global tunnel number
1038 * @return tunnel handler, NULL if doesn't exist
1040 static struct MeshTunnel *
1041 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1043 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1048 * Callback used to notify a client owner of a tunnel that a peer has
1049 * disconnected, most likely because of a path change.
1051 * @param n Node in the tree representing the disconnected peer
1054 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1056 struct GNUNET_MESH_PeerControl msg;
1058 if (NULL == n->t->client || NULL == nc)
1061 msg.header.size = htons (sizeof (msg));
1062 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1063 msg.tunnel_id = htonl (n->t->local_tid);
1064 GNUNET_PEER_resolve (n->peer, &msg.peer);
1065 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1066 &msg.header, GNUNET_NO);
1071 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1072 * needed rescources.
1074 * @param t Tunnel we want to add a new peer to
1075 * @param peer PeerInfo of the peer being added
1079 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1081 struct MeshPeerPath *p;
1082 struct MeshPeerPath *best_p;
1083 unsigned int best_cost;
1086 if (NULL != tree_find_peer(t->tree->root, peer->id))
1088 /* Already have it, nothing to do. */
1093 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1094 if (NULL == (p = peer->path_head))
1101 best_cost = UINT_MAX;
1104 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1111 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1112 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1113 t->path_refresh_task =
1114 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1120 * Notify a tunnel that a connection has broken that affects at least
1121 * some of its peers.
1123 * @param t Tunnel affected.
1124 * @param peer Peer that (at least) has been affected by the disconnection.
1125 * @param p1 Peer that got disconnected from p2.
1126 * @param p2 Peer that got disconnected from p1.
1128 * @return Short ID of the peer disconnected (either p1 or p2).
1129 * 0 if the tunnel remained unaffected.
1131 static GNUNET_PEER_Id
1132 tunnel_notify_connection_broken (struct MeshTunnel *t,
1133 struct MeshPeerInfo *peer,
1137 return tree_notify_connection_broken (t->tree, p1, p2,
1138 ¬ify_peer_disconnected);
1143 * Destroy the tunnel and free any allocated resources linked to it
1145 * @param t the tunnel to destroy
1147 * @return GNUNET_OK on success
1150 tunnel_destroy (struct MeshTunnel *t)
1152 struct MeshClient *c;
1153 struct MeshQueue *q;
1154 struct MeshQueue *qn;
1155 GNUNET_HashCode hash;
1158 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1167 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1168 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1173 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1174 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1178 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1182 if (NULL != q->data)
1183 GNUNET_free (q->data);
1187 /* TODO cancel core transmit ready in case it was active */
1189 tree_destroy(t->tree);
1190 if (NULL != t->dht_get_type)
1191 GNUNET_DHT_get_stop(t->dht_get_type);
1192 t->dht_get_type = NULL;
1199 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1200 * client when the client disconnects.
1202 * @param cls closure (client that is disconnecting)
1203 * @param key the hash of the local tunnel id (used to access the hashmap)
1204 * @param value the value stored at the key (tunnel to destroy)
1206 * @return GNUNET_OK on success
1209 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1211 struct MeshTunnel *t = value;
1214 if (NULL != t->dht_get_type)
1216 GNUNET_DHT_get_stop (t->dht_get_type);
1218 r = tunnel_destroy (t);
1223 /******************************************************************************/
1224 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1225 /******************************************************************************/
1229 * Function called to notify a client about the socket
1230 * being ready to queue more data. "buf" will be
1231 * NULL and "size" zero if the socket was closed for
1232 * writing in the meantime.
1234 * @param cls closure
1235 * @param size number of bytes available in buf
1236 * @param buf where the callee should write the message
1237 * @return number of bytes written to buf
1240 send_core_create_path (void *cls, size_t size, void *buf)
1242 struct MeshPathInfo *info = cls;
1243 struct GNUNET_MESH_ManipulatePath *msg;
1244 struct GNUNET_PeerIdentity *peer_ptr;
1245 struct MeshPeerInfo *peer = info->peer;
1246 struct MeshTunnel *t = info->t;
1247 struct MeshPeerPath *p = info->path;
1252 sizeof (struct GNUNET_MESH_ManipulatePath) +
1253 p->length * sizeof (struct GNUNET_PeerIdentity);
1255 if (size < size_needed || NULL == buf)
1257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
1258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
1259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
1261 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1262 GNUNET_TIME_UNIT_FOREVER_REL,
1263 path_get_first_hop (t->tree, peer->id),
1265 &send_core_create_path,
1270 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1271 msg->header.size = htons (size_needed);
1272 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1273 msg->tid = ntohl (t->id.tid);
1275 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1276 for (i = 0; i < p->length; i++)
1278 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1285 "MESH: CREATE PATH (%u bytes long) sent!\n",
1293 * Function called to notify a client about the socket
1294 * being ready to queue more data. "buf" will be
1295 * NULL and "size" zero if the socket was closed for
1296 * writing in the meantime.
1298 * @param cls closure (MeshDataDescriptor with all info to build packet)
1299 * @param size number of bytes available in buf
1300 * @param buf where the callee should write the message
1301 * @return number of bytes written to buf
1304 send_core_data_to_origin (void *cls, size_t size, void *buf)
1306 struct MeshDataDescriptor *info = cls;
1307 struct GNUNET_MESH_ToOrigin *msg = buf;
1310 GNUNET_assert (NULL != info);
1311 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1312 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1314 if (total_size > size)
1316 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1317 "not enough buffer to send data to origin\n");
1320 msg->header.size = htons (total_size);
1321 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1322 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1323 msg->tid = htonl (info->origin->tid);
1324 if (0 != info->size)
1326 memcpy (&msg[1], &info[1], info->size);
1328 if (NULL != info->client)
1330 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1339 * Function called to notify a client about the socket
1340 * being ready to queue more data. "buf" will be
1341 * NULL and "size" zero if the socket was closed for
1342 * writing in the meantime.
1344 * @param cls closure (data itself)
1345 * @param size number of bytes available in buf
1346 * @param buf where the callee should write the message
1348 * @return number of bytes written to buf
1351 send_core_data_multicast (void *cls, size_t size, void *buf)
1353 struct MeshDataDescriptor *info = cls;
1354 struct GNUNET_MESH_Multicast *msg = buf;
1357 GNUNET_assert (NULL != info);
1358 GNUNET_assert (NULL != info->peer);
1359 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1360 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1362 if (total_size > size)
1365 struct GNUNET_PeerIdentity id;
1367 GNUNET_PEER_resolve(info->peer->id, &id);
1368 info->peer->infos[info->handler_n] = info;
1369 info->peer->types[info->handler_n] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1370 info->peer->core_transmit[info->handler_n] =
1371 GNUNET_CORE_notify_transmit_ready (core_handle,
1374 GNUNET_TIME_UNIT_FOREVER_REL,
1377 &send_core_data_multicast,
1381 info->peer->core_transmit[info->handler_n] = NULL;
1382 info->peer->infos[info->handler_n] = NULL;
1383 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1384 msg->header.size = htons (total_size);
1385 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1386 msg->tid = htonl (info->origin->tid);
1387 memcpy (&msg[1], info->data, info->size);
1388 if (0 == --(*info->copies))
1390 if (NULL != info->client)
1392 /* FIXME One unresponsive neighbor (who doesn't "call" tmt_rdy) can lock
1393 * the client from sending anything else to the service.
1394 * - Call receive_done after certain timeout.
1395 * - Here cancel the timeout.
1397 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1399 GNUNET_free (info->data);
1400 GNUNET_free (info->copies);
1408 * Function called to notify a client about the socket
1409 * being ready to queue more data. "buf" will be
1410 * NULL and "size" zero if the socket was closed for
1411 * writing in the meantime.
1413 * @param cls closure (MeshDataDescriptor)
1414 * @param size number of bytes available in buf
1415 * @param buf where the callee should write the message
1416 * @return number of bytes written to buf
1419 send_core_path_ack (void *cls, size_t size, void *buf)
1421 struct MeshDataDescriptor *info = cls;
1422 struct GNUNET_MESH_PathACK *msg = buf;
1424 GNUNET_assert (NULL != info);
1427 info->peer->core_transmit[info->handler_n] = NULL;
1429 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1434 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1435 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1436 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1437 msg->tid = htonl (info->origin->tid);
1438 msg->peer_id = my_full_id;
1440 /* TODO add signature */
1442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
1443 return sizeof (struct GNUNET_MESH_PathACK);
1448 * Function called to notify a client about the socket
1449 * being ready to queue more data. "buf" will be
1450 * NULL and "size" zero if the socket was closed for
1451 * writing in the meantime.
1453 * @param cls closure (data itself)
1454 * @param size number of bytes available in buf
1455 * @param buf where the callee should write the message
1456 * @return number of bytes written to buf
1459 send_core_data_raw (void *cls, size_t size, void *buf)
1461 struct GNUNET_MessageHeader *msg = cls;
1464 GNUNET_assert (NULL != msg);
1465 total_size = ntohs (msg->size);
1467 if (total_size > size)
1472 memcpy (buf, msg, total_size);
1480 * Send another peer a notification to destroy a tunnel
1481 * @param cls The tunnel to destroy
1482 * @param size Size in the buffer
1483 * @param buf Memory where to put the data to transmit
1484 * @return Size of data put in buffer
1487 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1489 struct MeshTunnel *t = cls;
1490 struct MeshClient *c;
1491 struct GNUNET_MESH_TunnelMessage *msg;
1495 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1496 /*FIXME*/ msg->header.size =
1497 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1498 msg->tunnel_id = htonl (t->id.tid);
1500 tunnel_destroy (c, t);
1501 return sizeof (struct GNUNET_MESH_TunnelMessage);
1507 * Send the message to all clients that have subscribed to its type
1509 * @param msg Pointer to the message itself
1510 * @return number of clients this message was sent to
1513 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1515 struct MeshClient *c;
1519 type = ntohs (msg->type);
1520 for (count = 0, c = clients; c != NULL; c = c->next)
1522 if (client_is_subscribed (type, c))
1525 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1535 * Notify the client that owns the tunnel that a peer has connected to it
1537 * @param t Tunnel whose owner to notify
1538 * @param id Short id of the peer that has connected
1541 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
1543 struct GNUNET_MESH_PeerControl pc;
1545 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1546 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1547 pc.tunnel_id = htonl (t->local_tid);
1548 GNUNET_PEER_resolve (id, &pc.peer);
1549 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1550 &pc.header, GNUNET_NO);
1554 /******************************************************************************/
1555 /******************** MESH NETWORK HANDLERS **************************/
1556 /******************************************************************************/
1560 * Core handler for path creation
1561 * struct GNUNET_CORE_MessageHandler
1563 * @param cls closure
1564 * @param message message
1565 * @param peer peer identity this notification is about
1566 * @param atsi performance data
1567 * @return GNUNET_OK to keep the connection open,
1568 * GNUNET_SYSERR to close it (signal serious error)
1572 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1573 const struct GNUNET_MessageHeader *message,
1574 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1576 unsigned int own_pos;
1579 MESH_TunnelNumber tid;
1580 struct GNUNET_MESH_ManipulatePath *msg;
1581 struct GNUNET_PeerIdentity *pi;
1582 struct GNUNET_PeerIdentity id;
1583 GNUNET_HashCode hash;
1584 struct MeshPeerPath *path;
1585 struct MeshPeerInfo *dest_peer_info;
1586 struct MeshPeerInfo *orig_peer_info;
1587 struct MeshTunnel *t;
1589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1590 "MESH: Received a path create msg\n");
1591 size = ntohs (message->size);
1592 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1594 GNUNET_break_op (0);
1598 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1599 if (size % sizeof (struct GNUNET_PeerIdentity))
1601 GNUNET_break_op (0);
1604 size /= sizeof (struct GNUNET_PeerIdentity);
1607 GNUNET_break_op (0);
1610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1611 "MESH: path as %u hops.\n",
1613 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1615 tid = ntohl (msg->tid);
1616 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1617 t = tunnel_get (pi, tid);
1618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1619 "MESH: path is for tunnel %s [%X].\n",
1624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1625 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1626 t->id.oid = GNUNET_PEER_intern (pi);
1628 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1629 t->local_tid = next_local_tid++;
1630 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
1632 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1634 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1635 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1642 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1643 if (NULL == dest_peer_info)
1645 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1646 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1647 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1649 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1651 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1652 if (NULL == orig_peer_info)
1654 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1655 orig_peer_info->id = GNUNET_PEER_intern (pi);
1656 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1657 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1660 path = path_new (size);
1662 for (i = 0; i < size; i++)
1664 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1665 if (path->peers[i] == myid)
1669 { /* cannot be self, must be 'not found' */
1670 /* create path: self not found in path through self */
1671 GNUNET_break_op (0);
1672 path_destroy (path);
1673 /* FIXME error. destroy tunnel? leave for timeout? */
1676 if (own_pos == size - 1)
1678 /* It is for us! Send ack. */
1679 struct GNUNET_MESH_TunnelNotification cmsg;
1680 struct MeshDataDescriptor *info;
1683 path_add_to_origin (orig_peer_info, path); /* inverts path! */
1684 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1685 info->origin = &t->id;
1686 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1687 GNUNET_assert (NULL != info->peer);
1688 for (j = 0; info->peer->core_transmit[j]; j++)
1690 if (j == (CORE_QUEUE_SIZE - 1))
1696 info->handler_n = j;
1697 info->peer->core_transmit[j] =
1698 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1699 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1700 sizeof (struct GNUNET_MESH_PathACK),
1701 &send_core_path_ack, info);
1702 cmsg.header.size = htons(sizeof(cmsg));
1703 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1704 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
1705 cmsg.tunnel_id = htonl(t->local_tid);
1706 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
1710 /* It's for somebody else! Retransmit. */
1711 struct MeshPathInfo *path_info;
1713 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1715 path_info->path = path;
1716 path_info->peer = dest_peer_info;
1718 path_add_to_peer (dest_peer_info, path);
1719 GNUNET_PEER_resolve (path->peers[own_pos + 1], &id);
1720 GNUNET_CORE_notify_transmit_ready (
1724 GNUNET_TIME_UNIT_FOREVER_REL,
1726 sizeof (struct GNUNET_MESH_ManipulatePath) +
1727 path->length * sizeof(struct GNUNET_PeerIdentity),
1728 &send_core_create_path,
1736 * Core handler for mesh network traffic going from the origin to a peer
1738 * @param cls closure
1739 * @param peer peer identity this notification is about
1740 * @param message message
1741 * @param atsi performance data
1742 * @return GNUNET_OK to keep the connection open,
1743 * GNUNET_SYSERR to close it (signal serious error)
1746 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1747 const struct GNUNET_MessageHeader *message,
1748 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1750 struct GNUNET_MESH_Unicast *msg;
1751 struct MeshTunnel *t;
1752 struct MeshPeerInfo *pi;
1755 size = ntohs (message->size);
1757 sizeof (struct GNUNET_MESH_Unicast) +
1758 sizeof (struct GNUNET_MessageHeader))
1763 msg = (struct GNUNET_MESH_Unicast *) message;
1764 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1767 /* TODO notify back: we don't know this tunnel */
1768 GNUNET_break_op (0);
1771 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1772 &msg->destination.hashPubKey);
1775 /* TODO maybe feedback, log to statistics */
1776 GNUNET_break_op (0);
1781 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1784 msg = GNUNET_malloc (size);
1785 memcpy (msg, message, size);
1786 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1787 GNUNET_TIME_UNIT_FOREVER_REL,
1788 path_get_first_hop (t->tree, pi->id),
1790 &send_core_data_raw, msg);
1796 * Core handler for mesh network traffic going from the origin to all peers
1798 * @param cls closure
1799 * @param message message
1800 * @param peer peer identity this notification is about
1801 * @param atsi performance data
1802 * @return GNUNET_OK to keep the connection open,
1803 * GNUNET_SYSERR to close it (signal serious error)
1805 * TODO: Check who we got this from, to validate route.
1808 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1809 const struct GNUNET_MessageHeader *message,
1810 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1812 struct GNUNET_MESH_Multicast *msg;
1813 struct GNUNET_PeerIdentity *id;
1814 struct MeshDataDescriptor *info;
1815 struct MeshTunnelTreeNode *n;
1816 struct MeshTunnel *t;
1817 unsigned int *copies;
1822 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Multicast);
1823 if (size < sizeof (struct GNUNET_MessageHeader))
1825 GNUNET_break_op (0);
1828 msg = (struct GNUNET_MESH_Multicast *) message;
1829 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1833 /* TODO notify that we dont know that tunnel */
1834 GNUNET_break_op (0);
1838 /* Transmit to locally interested clients */
1839 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
1841 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1843 n = t->tree->me->children_head;
1846 copies = GNUNET_malloc (sizeof (unsigned int));
1847 for (*copies = 0; NULL != n; n = n->next)
1849 n = t->tree->me->children_head;
1850 data = GNUNET_malloc (size);
1851 memcpy (data, &msg[1], size);
1854 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1855 info->origin = &t->id;
1858 info->copies = copies;
1859 info->client = t->client->handle;
1860 info->destination = n->peer;
1861 id = path_get_first_hop(t->tree, n->peer);
1862 info->peer = peer_info_get(id);
1863 GNUNET_assert (NULL != info->peer);
1864 for (i = 0; NULL != info->peer->core_transmit[i]; i++)
1866 if (i == (CORE_QUEUE_SIZE - 1))
1872 info->handler_n = i;
1873 info->peer->infos[i] = info;
1874 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1875 info->peer->core_transmit[i] =
1876 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1877 GNUNET_TIME_UNIT_FOREVER_REL, id,
1878 ntohs (msg->header.size),
1879 &send_core_data_multicast, info);
1887 * Core handler for mesh network traffic
1889 * @param cls closure
1890 * @param message message
1891 * @param peer peer identity this notification is about
1892 * @param atsi performance data
1894 * @return GNUNET_OK to keep the connection open,
1895 * GNUNET_SYSERR to close it (signal serious error)
1898 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
1899 const struct GNUNET_MessageHeader *message,
1900 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1902 struct GNUNET_MESH_ToOrigin *msg;
1903 struct GNUNET_PeerIdentity id;
1904 struct MeshPeerInfo *peer_info;
1905 struct MeshTunnel *t;
1908 size = ntohs (message->size);
1909 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
1910 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
1912 GNUNET_break_op (0);
1915 msg = (struct GNUNET_MESH_ToOrigin *) message;
1916 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1920 /* TODO notify that we dont know this tunnel (whom)? */
1924 if (t->id.oid == myid)
1926 if (NULL == t->client)
1928 /* got data packet for ownerless tunnel */
1929 GNUNET_break_op (0);
1932 /* TODO signature verification */
1933 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
1937 peer_info = peer_info_get (&msg->oid);
1938 if (NULL == peer_info)
1940 /* unknown origin of tunnel */
1944 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
1945 msg = GNUNET_malloc (size);
1946 memcpy (msg, message, size);
1947 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1948 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1949 &send_core_data_raw, msg);
1956 * Core handler for path ACKs
1958 * @param cls closure
1959 * @param message message
1960 * @param peer peer identity this notification is about
1961 * @param atsi performance data
1963 * @return GNUNET_OK to keep the connection open,
1964 * GNUNET_SYSERR to close it (signal serious error)
1967 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
1968 const struct GNUNET_MessageHeader *message,
1969 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1971 struct GNUNET_MESH_PathACK *msg;
1972 struct MeshTunnelTreeNode *n;
1973 struct MeshPeerInfo *peer_info;
1974 struct MeshTunnel *t;
1976 msg = (struct GNUNET_MESH_PathACK *) message;
1977 t = tunnel_get (&msg->oid, msg->tid);
1980 /* TODO notify that we don't know the tunnel */
1984 /* Message for us? */
1985 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
1987 if (NULL == t->client)
1989 GNUNET_break_op (0);
1992 peer_info = peer_info_get (&msg->peer_id);
1993 if (NULL == peer_info)
1995 GNUNET_break_op (0);
1998 n = tree_find_peer(t->tree->root, peer_info->id);
2001 GNUNET_break_op (0);
2004 n->status = MESH_PEER_READY;
2005 send_client_peer_connected(t, peer_info->id);
2009 peer_info = peer_info_get (&msg->oid);
2010 if (NULL == peer_info)
2012 /* If we know the tunnel, we should DEFINITELY know the peer */
2016 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2017 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2018 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2019 GNUNET_TIME_UNIT_FOREVER_REL,
2020 path_get_first_hop (t->tree,
2022 sizeof (struct GNUNET_MESH_PathACK),
2023 &send_core_data_raw, msg);
2029 * Functions to handle messages from core
2031 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2032 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2033 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2034 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2035 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2036 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2037 sizeof (struct GNUNET_MESH_PathACK)},
2043 /******************************************************************************/
2044 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2045 /******************************************************************************/
2048 * deregister_app: iterator for removing each application registered by a client
2050 * @param cls closure
2051 * @param key the hash of the application id (used to access the hashmap)
2052 * @param value the value stored at the key (client)
2054 * @return GNUNET_OK on success
2057 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2059 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2065 * notify_client_connection_failure: notify a client that the connection to the
2066 * requested remote peer is not possible (for instance, no route found)
2067 * Function called when the socket is ready to queue more data. "buf" will be
2068 * NULL and "size" zero if the socket was closed for writing in the meantime.
2070 * @param cls closure
2071 * @param size number of bytes available in buf
2072 * @param buf where the callee should write the message
2073 * @return number of bytes written to buf
2076 notify_client_connection_failure (void *cls, size_t size, void *buf)
2079 struct MeshPeerInfo *peer_info;
2080 struct GNUNET_MESH_PeerControl *msg;
2081 struct GNUNET_PeerIdentity id;
2083 if (0 == size && NULL == buf)
2085 // TODO retry? cancel?
2089 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2090 peer_info = (struct MeshPeerInfo *) cls;
2091 msg = (struct GNUNET_MESH_PeerControl *) buf;
2092 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2093 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2094 // msg->tunnel_id = htonl(peer_info->t->tid);
2095 GNUNET_PEER_resolve (peer_info->id, &id);
2096 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2104 * Send keepalive packets for a peer
2106 * @param cls Closure (tunnel for which to send the keepalive).
2107 * @param tc Notification context.
2109 * TODO: implement explicit multicast keepalive?
2112 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2114 struct MeshTunnel *t = cls;
2115 struct GNUNET_MessageHeader *payload;
2116 struct GNUNET_MESH_Multicast *msg;
2119 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2120 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2126 "MESH: sending keepalive for tunnel %d\n",
2129 size = sizeof(struct GNUNET_MESH_Multicast) +
2130 sizeof(struct GNUNET_MessageHeader);
2131 msg = GNUNET_malloc (size);
2132 msg->header.size = htons (size);
2133 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2134 msg->oid = my_full_id;
2135 msg->tid = htonl(t->id.tid);
2136 payload = (struct GNUNET_MessageHeader *) &msg[1];
2137 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2138 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2139 handle_mesh_data_multicast (NULL, &my_full_id, &msg->header, NULL);
2142 t->path_refresh_task =
2143 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
2149 * Function to process paths received for a new peer addition. The recorded
2150 * paths form the initial tunnel, which can be optimized later.
2151 * Called on each result obtained for the DHT search.
2153 * @param cls closure
2154 * @param exp when will this value expire
2155 * @param key key of the result
2156 * @param type type of the result
2157 * @param size number of bytes in data
2158 * @param data pointer to the result data
2160 * TODO: re-issue the request after certain time? cancel after X results?
2163 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2164 const GNUNET_HashCode * key,
2165 const struct GNUNET_PeerIdentity *get_path,
2166 unsigned int get_path_length,
2167 const struct GNUNET_PeerIdentity *put_path,
2168 unsigned int put_path_length,
2169 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2171 struct MeshPathInfo *path_info = cls;
2172 struct MeshPathInfo *path_info_aux;
2173 struct MeshPeerPath *p;
2174 struct MeshPeerPath *aux;
2175 struct GNUNET_PeerIdentity pi;
2178 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2179 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2180 "MESH: Got results from DHT for %s\n",
2181 GNUNET_h2s_full(&pi.hashPubKey));
2182 GNUNET_DHT_get_stop(path_info->peer->dhtget);
2183 path_info->peer->dhtget = NULL;
2184 if (NULL == get_path || NULL == put_path)
2186 if (NULL == path_info->peer->path_head)
2188 // Find ourselves some alternate initial path to the destination: retry
2189 GNUNET_PEER_resolve(path_info->peer->id, &pi);
2190 path_info->peer->dhtget =
2191 GNUNET_DHT_get_start(dht_handle, /* handle */
2192 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2193 GNUNET_BLOCK_TYPE_TEST, /* type */
2194 &pi.hashPubKey, /*key to search */
2195 4, /* replication level */
2196 GNUNET_DHT_RO_RECORD_ROUTE |
2197 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2199 0, /* xquery bits */
2200 &dht_get_id_handler,
2201 (void *) path_info);
2206 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2207 path_add_to_peer (path_info->peer, p);
2208 for (i = 0; i < path_info->peer->ntunnels; i++)
2210 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2211 aux = tree_get_path_to_peer(path_info->peer->tunnels[i]->tree,
2212 path_info->peer->id);
2213 if (aux->length > 1)
2215 struct GNUNET_PeerIdentity id;
2217 path_info_aux = GNUNET_malloc (sizeof (struct MeshPathInfo));
2218 path_info_aux->path = aux;
2219 path_info_aux->peer = path_info->peer;
2220 path_info_aux->t = path_info->t;
2221 GNUNET_PEER_resolve (p->peers[1], &id);
2222 GNUNET_CORE_notify_transmit_ready (core_handle, /* handle */
2225 GNUNET_TIME_UNIT_FOREVER_REL,
2228 sizeof (struct GNUNET_MESH_ManipulatePath)
2231 sizeof (struct GNUNET_PeerIdentity)),
2233 &send_core_create_path,
2235 path_info_aux); /* cls */
2239 send_client_peer_connected(path_info->t, myid);
2242 GNUNET_free (path_info);
2249 * Function to process paths received for a new peer addition. The recorded
2250 * paths form the initial tunnel, which can be optimized later.
2251 * Called on each result obtained for the DHT search.
2253 * @param cls closure
2254 * @param exp when will this value expire
2255 * @param key key of the result
2256 * @param type type of the result
2257 * @param size number of bytes in data
2258 * @param data pointer to the result data
2261 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2262 const GNUNET_HashCode * key,
2263 const struct GNUNET_PeerIdentity *get_path,
2264 unsigned int get_path_length,
2265 const struct GNUNET_PeerIdentity *put_path,
2266 unsigned int put_path_length,
2267 enum GNUNET_BLOCK_Type type, size_t size,
2270 const struct GNUNET_PeerIdentity *pi = data;
2271 struct GNUNET_PeerIdentity id;
2272 struct MeshTunnel *t = cls;
2273 struct MeshPeerInfo *peer_info;
2274 struct MeshPathInfo *path_info;
2275 struct MeshPeerPath *p;
2278 if (size != sizeof (struct GNUNET_PeerIdentity))
2280 GNUNET_break_op (0);
2283 GNUNET_assert (NULL != t->client);
2284 GNUNET_DHT_get_stop (t->dht_get_type);
2285 t->dht_get_type = NULL;
2286 peer_info = peer_info_get (pi);
2287 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2288 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2290 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2291 NULL == peer_info->dhtget)
2293 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2294 path_info->peer = peer_info;
2296 /* we don't have a route to the peer, let's try a direct lookup */
2298 GNUNET_DHT_get_start (dht_handle, /* handle */
2299 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2300 GNUNET_BLOCK_TYPE_TEST, /* block type */
2301 &pi->hashPubKey, /* key to look up */
2302 10U, /* replication level */
2303 GNUNET_DHT_RO_RECORD_ROUTE |
2304 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2305 /* option to dht: record route */
2307 0, /* xquery bits */
2308 dht_get_id_handler, /* callback */
2309 path_info); /* closure */
2313 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2314 path_add_to_peer (peer_info, p);
2315 tunnel_add_peer(t, peer_info);
2316 p = tree_get_path_to_peer(t->tree, peer_info->id);
2318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2319 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2320 t->local_tid, p->length);
2321 for (i = 0; i < p->length; i++)
2323 GNUNET_PEER_resolve (p->peers[0], &id);
2324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2325 GNUNET_h2s_full (&id.hashPubKey));
2331 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2333 path_info->peer = peer_info;
2334 path_info->path = p;
2335 GNUNET_PEER_resolve (p->peers[1], &id);
2336 GNUNET_CORE_notify_transmit_ready (core_handle,
2342 GNUNET_TIME_UNIT_FOREVER_REL,
2346 sizeof (struct GNUNET_MESH_ManipulatePath)
2349 sizeof (struct GNUNET_PeerIdentity)),
2351 &send_core_create_path,
2353 path_info); /* cls */
2357 send_client_peer_connected(t, myid);
2361 /******************************************************************************/
2362 /********************* MESH LOCAL HANDLES **************************/
2363 /******************************************************************************/
2367 * Handler for client disconnection
2369 * @param cls closure
2370 * @param client identification of the client; NULL
2371 * for the last call when the server is destroyed
2374 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2376 struct MeshClient *c;
2377 struct MeshClient *next;
2379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2385 if (c->handle != client && NULL != client)
2387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2392 if (NULL != c->tunnels)
2394 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2395 &tunnel_destroy_iterator,
2397 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2400 /* deregister clients applications */
2401 if (NULL != c->apps)
2403 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2404 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2406 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2407 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2409 GNUNET_SCHEDULER_cancel (announce_applications_task);
2410 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2412 if (NULL != c->types)
2413 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2414 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2426 * Handler for new clients
2428 * @param cls closure
2429 * @param client identification of the client
2430 * @param message the actual message, which includes messages the client wants
2433 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2434 const struct GNUNET_MessageHeader *message)
2436 struct GNUNET_MESH_ClientConnect *cc_msg;
2437 struct MeshClient *c;
2438 GNUNET_MESH_ApplicationType *a;
2445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2446 /* Check data sanity */
2447 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2448 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2449 ntypes = ntohs (cc_msg->types);
2450 napps = ntohs (cc_msg->applications);
2452 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2455 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2459 /* Create new client structure */
2460 c = GNUNET_malloc (sizeof (struct MeshClient));
2462 c->id = next_client_id++;
2465 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2468 GNUNET_MESH_ApplicationType at;
2471 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2472 for (i = 0; i < napps; i++)
2475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2476 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2477 /* store in clients hashmap */
2478 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2479 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2480 /* store in global hashmap, for announcements */
2481 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2482 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2484 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2485 announce_applications_task =
2486 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2494 t = (uint16_t *) & a[napps];
2495 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2496 for (i = 0; i < ntypes; i++)
2499 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2501 /* store in clients hashmap */
2502 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2503 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2504 /* store in global hashmap */
2505 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2506 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2510 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2512 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2513 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2514 GNUNET_SERVER_notification_context_add (nc, client);
2516 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2524 * Handler for requests of new tunnels
2526 * @param cls closure
2527 * @param client identification of the client
2528 * @param message the actual message
2531 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2532 const struct GNUNET_MessageHeader *message)
2534 struct GNUNET_MESH_TunnelMessage *t_msg;
2535 struct MeshTunnel *t;
2536 struct MeshClient *c;
2537 GNUNET_HashCode hash;
2539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2541 /* Sanity check for client registration */
2542 if (NULL == (c = client_get (client)))
2545 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2552 /* Message sanity check */
2553 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2556 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2560 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2561 /* Sanity check for tunnel numbering */
2562 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2565 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2568 /* Sanity check for duplicate tunnel IDs */
2569 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2572 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2576 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2577 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2578 while (NULL != tunnel_get_by_pi (myid, next_tid))
2579 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2580 t->id.tid = next_tid++;
2582 t->local_tid = ntohl (t_msg->tunnel_id);
2584 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2586 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2588 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2589 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2592 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2596 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2598 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2599 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2602 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2605 t->tree = tree_new (t, myid);
2606 t->tree->refresh = REFRESH_PATH_TIME;
2607 t->tree->root->status = MESH_PEER_READY;
2608 t->tree->me = t->tree->root;
2610 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2616 * Handler for requests of deleting tunnels
2618 * @param cls closure
2619 * @param client identification of the client
2620 * @param message the actual message
2623 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2624 const struct GNUNET_MessageHeader *message)
2626 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2627 struct MeshClient *c;
2628 struct MeshTunnel *t;
2629 MESH_TunnelNumber tid;
2630 GNUNET_HashCode hash;
2632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2634 /* Sanity check for client registration */
2635 if (NULL == (c = client_get (client)))
2638 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2641 /* Message sanity check */
2642 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2645 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2651 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2653 /* Retrieve tunnel */
2654 tid = ntohl (tunnel_msg->tunnel_id);
2656 /* Remove from local id hashmap */
2657 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2658 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2659 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2661 /* Remove from global id hashmap */
2662 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2663 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2665 // notify_tunnel_destroy(t); FIXME
2667 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2673 * Handler for connection requests to new peers
2675 * @param cls closure
2676 * @param client identification of the client
2677 * @param message the actual message (PeerControl)
2680 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2681 const struct GNUNET_MessageHeader *message)
2683 struct GNUNET_MESH_PeerControl *peer_msg;
2684 struct MeshPathInfo *path_info;
2685 struct MeshPeerInfo *peer_info;
2686 struct MeshClient *c;
2687 struct MeshTunnel *t;
2688 MESH_TunnelNumber tid;
2690 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
2691 /* Sanity check for client registration */
2692 if (NULL == (c = client_get (client)))
2695 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2699 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2700 /* Sanity check for message size */
2701 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2704 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2708 /* Tunnel exists? */
2709 tid = ntohl (peer_msg->tunnel_id);
2710 t = tunnel_get_by_local_id (c, tid);
2714 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2718 /* Does client own tunnel? */
2719 if (t->client->handle != client)
2722 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2725 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
2726 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
2727 peer_info = peer_info_get (&peer_msg->peer);
2729 /* Start DHT search if needed, otherwise just add peer to tunnel. */
2730 if (NULL == peer_info->dhtget && NULL == peer_info->path_head)
2732 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2733 path_info->peer = peer_info;
2736 GNUNET_DHT_get_start(dht_handle, /* handle */
2737 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2738 GNUNET_BLOCK_TYPE_TEST, /* type */
2739 &peer_msg->peer.hashPubKey, /*key to search */
2740 4, /* replication level */
2741 GNUNET_DHT_RO_RECORD_ROUTE |
2742 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2744 0, /* xquery bits */
2745 &dht_get_id_handler,
2746 (void *) path_info);
2748 else if (NULL != peer_info->path_head)
2751 for (i = 0; i < CORE_QUEUE_SIZE; i++)
2753 if (NULL == peer_info->core_transmit[i])
2756 if (CORE_QUEUE_SIZE == i)
2759 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2762 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2763 path_info->peer = peer_info;
2765 tunnel_add_peer(t, peer_info);
2766 path_info->path = tree_get_path_to_peer(t->tree, peer_info->id);
2767 peer_info = peer_info_get(path_get_first_hop(t->tree, path_info->peer->id));
2768 peer_info->infos[i] = path_info;
2769 peer_info->types[i] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
2770 peer_info->core_transmit[i] =
2771 GNUNET_CORE_notify_transmit_ready (
2775 GNUNET_TIME_UNIT_FOREVER_REL,
2776 path_get_first_hop(t->tree, path_info->peer->id),
2777 sizeof (struct GNUNET_MESH_ManipulatePath)
2778 + path_info->path->length * sizeof(struct GNUNET_PeerIdentity),
2779 &send_core_create_path,
2782 /* Otherwise: there is no path yet, but there is a DHT_get active already. */
2783 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2789 * Handler for disconnection requests of peers in a tunnel
2791 * @param cls closure
2792 * @param client identification of the client
2793 * @param message the actual message (PeerControl)
2796 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2797 const struct GNUNET_MessageHeader *message)
2799 struct GNUNET_MESH_PeerControl *peer_msg;
2800 struct MeshClient *c;
2801 struct MeshTunnel *t;
2802 MESH_TunnelNumber tid;
2804 /* Sanity check for client registration */
2805 if (NULL == (c = client_get (client)))
2808 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2811 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2812 /* Sanity check for message size */
2813 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2816 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2820 /* Tunnel exists? */
2821 tid = ntohl (peer_msg->tunnel_id);
2822 t = tunnel_get_by_local_id (c, tid);
2826 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2830 /* Does client own tunnel? */
2831 if (t->client->handle != client)
2834 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2838 /* Ok, delete peer from tunnel */
2839 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2840 &peer_msg->peer.hashPubKey);
2842 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2848 * Handler for connection requests to new peers by type
2850 * @param cls closure
2851 * @param client identification of the client
2852 * @param message the actual message (ConnectPeerByType)
2855 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2856 const struct GNUNET_MessageHeader *message)
2858 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2859 struct MeshClient *c;
2860 struct MeshTunnel *t;
2861 GNUNET_HashCode hash;
2862 MESH_TunnelNumber tid;
2864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
2865 /* Sanity check for client registration */
2866 if (NULL == (c = client_get (client)))
2869 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2873 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2874 /* Sanity check for message size */
2875 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
2876 ntohs (connect_msg->header.size))
2879 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2883 /* Tunnel exists? */
2884 tid = ntohl (connect_msg->tunnel_id);
2885 t = tunnel_get_by_local_id (c, tid);
2889 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2893 /* Does client own tunnel? */
2894 if (t->client->handle != client)
2897 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2901 /* Do WE have the service? */
2902 t->type = ntohl (connect_msg->type);
2903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
2904 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
2905 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
2908 /* Yes! Fast forward, add ourselves to the tunnel and send the
2909 * good news to the client
2911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
2912 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
2913 peer_info_get (&my_full_id),
2914 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2916 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
2917 send_client_peer_connected(t, myid);
2918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
2919 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2922 /* Ok, lets find a peer offering the service */
2923 if (NULL != t->dht_get_type)
2925 GNUNET_DHT_get_stop (t->dht_get_type);
2927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
2928 GNUNET_h2s_full (&hash));
2930 GNUNET_DHT_get_start (dht_handle,
2931 GNUNET_TIME_UNIT_FOREVER_REL,
2932 GNUNET_BLOCK_TYPE_TEST,
2935 GNUNET_DHT_RO_RECORD_ROUTE |
2936 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2938 &dht_get_type_handler, t);
2940 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2946 * Handler for client traffic directed to one peer
2948 * @param cls closure
2949 * @param client identification of the client
2950 * @param message the actual message
2953 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
2954 const struct GNUNET_MessageHeader *message)
2956 struct MeshClient *c;
2957 struct MeshTunnel *t;
2958 struct MeshPeerInfo *pi;
2959 struct GNUNET_MESH_Unicast *data_msg;
2960 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 data_msg = (struct GNUNET_MESH_Unicast *) message;
2971 /* Sanity check for message size */
2972 size = ntohs (message->size);
2973 if (sizeof (struct GNUNET_MESH_Unicast) +
2974 sizeof (struct GNUNET_MessageHeader) > size)
2977 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2981 /* Tunnel exists? */
2982 tid = ntohl (data_msg->tid);
2983 t = tunnel_get_by_local_id (c, tid);
2987 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2991 /* Is it a local tunnel? Then, does client own the tunnel? */
2992 if (t->client->handle != NULL && t->client->handle != client)
2995 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2999 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3000 &data_msg->destination.hashPubKey);
3001 /* Is the selected peer in the tunnel? */
3005 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3009 /* Ok, everything is correct, send the message
3010 * (pretend we got it from a mesh peer)
3013 char buf[ntohs (message->size)];
3014 struct GNUNET_MESH_Unicast *copy;
3016 /* Work around const limitation */
3017 copy = (struct GNUNET_MESH_Unicast *) buf;
3018 memcpy (buf, data_msg, size);
3019 copy->oid = my_full_id;
3020 copy->tid = htonl (t->id.tid);
3021 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL);
3023 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3028 * Handler for client traffic directed to all peers in a tunnel
3030 * @param cls closure
3031 * @param client identification of the client
3032 * @param message the actual message
3035 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3036 const struct GNUNET_MessageHeader *message)
3038 struct MeshClient *c;
3039 struct MeshTunnel *t;
3040 struct GNUNET_MESH_Multicast *data_msg;
3041 MESH_TunnelNumber tid;
3043 /* Sanity check for client registration */
3044 if (NULL == (c = client_get (client)))
3047 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3050 data_msg = (struct GNUNET_MESH_Multicast *) message;
3051 /* Sanity check for message size */
3052 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3055 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3059 /* Tunnel exists? */
3060 tid = ntohl (data_msg->tid);
3061 t = tunnel_get_by_local_id (c, tid);
3065 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3069 /* Does client own tunnel? */
3070 if (t->client->handle != client)
3073 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3078 char buf[ntohs(message->size)];
3079 struct GNUNET_MESH_Multicast *copy;
3081 copy = (struct GNUNET_MESH_Multicast *)buf;
3082 memcpy(buf, message, ntohs(message->size));
3083 copy->oid = my_full_id;
3084 copy->tid = htonl(t->id.tid);
3085 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL);
3088 /* receive done gets called when last copy is sent */
3093 * Functions to handle messages from clients
3095 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3096 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3097 {&handle_local_tunnel_create, NULL,
3098 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3099 sizeof (struct GNUNET_MESH_TunnelMessage)},
3100 {&handle_local_tunnel_destroy, NULL,
3101 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3102 sizeof (struct GNUNET_MESH_TunnelMessage)},
3103 {&handle_local_connect_add, NULL,
3104 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3105 sizeof (struct GNUNET_MESH_PeerControl)},
3106 {&handle_local_connect_del, NULL,
3107 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3108 sizeof (struct GNUNET_MESH_PeerControl)},
3109 {&handle_local_connect_by_type, NULL,
3110 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3111 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3112 {&handle_local_unicast, NULL,
3113 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3114 {&handle_local_unicast, NULL,
3115 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3116 {&handle_local_multicast, NULL,
3117 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3123 * To be called on core init/fail.
3125 * @param cls service closure
3126 * @param server handle to the server for this service
3127 * @param identity the public identity of this peer
3128 * @param publicKey the public key of this peer
3131 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3132 const struct GNUNET_PeerIdentity *identity,
3133 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
3135 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3136 core_handle = server;
3137 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3139 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3140 GNUNET_SCHEDULER_shutdown();
3146 * Method called whenever a given peer connects.
3148 * @param cls closure
3149 * @param peer peer identity this notification is about
3150 * @param atsi performance data for the connection
3153 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3154 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3156 struct MeshPeerInfo *peer_info;
3157 struct MeshPeerPath *path;
3159 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3160 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3161 // GNUNET_h2s(&my_full_id.hashPubKey));
3162 peer_info = peer_info_get (peer);
3163 if (myid == peer_info->id)
3165 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3170 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3171 // GNUNET_h2s(&peer->hashPubKey));
3173 path = path_new (2);
3174 path->peers[0] = myid;
3175 path->peers[1] = peer_info->id;
3176 GNUNET_PEER_change_rc(myid, 1);
3177 GNUNET_PEER_change_rc(peer_info->id, 1);
3178 path_add_to_peer (peer_info, path);
3183 * Method called whenever a peer disconnects.
3185 * @param cls closure
3186 * @param peer peer identity this notification is about
3189 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3191 struct MeshPeerInfo *pi;
3194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3195 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3201 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3203 if (pi->core_transmit[i])
3205 struct MeshDataDescriptor *dd;
3206 struct MeshPathInfo *path_info;
3207 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
3208 /* TODO: notify that tranmission has failed */
3209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: data at %u\n", i);
3210 switch (pi->types[i])
3212 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3213 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3214 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3215 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
3217 if (0 == --(*dd->copies))
3219 GNUNET_free (dd->copies);
3220 GNUNET_free (dd->data);
3223 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
3225 path_info = pi->infos[i];
3226 path_destroy(path_info->path);
3229 GNUNET_free (pi->infos[i]);
3232 path_remove_from_peer (pi, pi->id, myid);
3235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3241 /******************************************************************************/
3242 /************************ MAIN FUNCTIONS ****************************/
3243 /******************************************************************************/
3246 * Iterator over hash map entries.
3248 * @param cls closure
3249 * @param key current key code
3250 * @param value value in the hash map
3251 * @return GNUNET_YES if we should continue to
3256 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
3258 struct MeshTunnel *t = value;
3264 * Task run during shutdown.
3270 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3273 /* TODO: destroy tunnels? */
3274 if (core_handle != NULL)
3276 GNUNET_CORE_disconnect (core_handle);
3279 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
3280 if (dht_handle != NULL)
3282 GNUNET_DHT_disconnect (dht_handle);
3287 GNUNET_SERVER_notification_context_destroy (nc);
3290 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3292 GNUNET_SCHEDULER_cancel (announce_id_task);
3293 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3299 * Process mesh requests.
3301 * @param cls closure
3302 * @param server the initialized server
3303 * @param c configuration to use
3306 run (void *cls, struct GNUNET_SERVER_Handle *server,
3307 const struct GNUNET_CONFIGURATION_Handle *c)
3309 struct MeshPeerInfo *peer;
3310 struct MeshPeerPath *p;
3313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3314 server_handle = server;
3315 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3316 CORE_QUEUE_SIZE, /* queue size */
3317 NULL, /* Closure passed to MESH functions */
3318 &core_init, /* Call core_init once connected */
3319 &core_connect, /* Handle connects */
3320 &core_disconnect, /* remove peers on disconnects */
3321 NULL, /* Do we care about "status" updates? */
3322 NULL, /* Don't notify about all incoming messages */
3323 GNUNET_NO, /* For header only in notification */
3324 NULL, /* Don't notify about all outbound messages */
3325 GNUNET_NO, /* For header-only out notification */
3326 core_handlers); /* Register these handlers */
3327 if (core_handle == NULL)
3330 GNUNET_SCHEDULER_shutdown ();
3335 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3338 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3340 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3341 GNUNET_SCHEDULER_shutdown ();
3344 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3345 GNUNET_free (keyfile);
3346 if (my_private_key == NULL)
3348 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3349 _("Mesh service could not access hostkey. Exiting.\n"));
3350 GNUNET_SCHEDULER_shutdown ();
3353 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3354 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3355 &my_full_id.hashPubKey);
3356 myid = GNUNET_PEER_intern (&my_full_id);
3358 dht_handle = GNUNET_DHT_connect (c, 64);
3359 if (dht_handle == NULL)
3365 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3367 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3368 peers = GNUNET_CONTAINER_multihashmap_create (32);
3369 applications = GNUNET_CONTAINER_multihashmap_create (32);
3370 types = GNUNET_CONTAINER_multihashmap_create (32);
3372 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3373 nc = GNUNET_SERVER_notification_context_create (server_handle,
3375 GNUNET_SERVER_disconnect_notify (server_handle,
3376 &handle_local_client_disconnect,
3381 clients_tail = NULL;
3386 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3387 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3389 /* Create a peer_info for the local peer */
3390 peer = peer_info_get(&my_full_id);
3393 path_add_to_peer(peer, p);
3395 /* Scheduled the task to clean up when shutdown is called */
3396 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3399 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3403 * The main function for the mesh service.
3405 * @param argc number of arguments from the command line
3406 * @param argv command line arguments
3407 * @return 0 ok, 1 on error
3410 main (int argc, char *const *argv)
3415 // fprintf (stderr, "main ()\n");
3417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3420 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3422 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3424 // fprintf (stderr, "main () END\n");