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 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;
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);
892 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
893 "MESH: Adding from GET: %s.\n",
894 GNUNET_i2s(&get_path[i]));
896 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
897 p->peers[p->length - 1] = id;
901 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
902 for (i--; i >= 0; i--)
904 id = GNUNET_PEER_intern (&put_path[i]);
907 /* PUT path went through us, so discard the path up until now and start
908 * from here to get a much shorter (and loop-free) path.
913 if (p->length > 0 && id == p->peers[p->length - 1])
915 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
916 GNUNET_PEER_change_rc(id, -1);
920 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
921 "MESH: Adding from PUT: %s.\n",
922 GNUNET_i2s(&put_path[i]));
924 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
925 p->peers[p->length - 1] = id;
929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
930 "MESH: (first of GET: %s)\n",
931 GNUNET_h2s_full(&get_path[0].hashPubKey));
932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
933 "MESH: (first of PUT: %s)\n",
934 GNUNET_h2s_full(&put_path[0].hashPubKey));
935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
936 "MESH: In total: %d hops\n",
938 for (i = 0; i < p->length; i++)
940 struct GNUNET_PeerIdentity peer_id;
942 GNUNET_PEER_resolve(p->peers[i], &peer_id);
943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
946 GNUNET_h2s_full(&peer_id.hashPubKey));
954 * Send keepalive packets for a peer
956 * @param cls Closure (tunnel for which to send the keepalive).
957 * @param tc Notification context.
959 * TODO: implement explicit multicast keepalive?
962 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
966 * Check if client has registered with the service and has not disconnected
968 * @param client the client to check
970 * @return non-NULL if client exists in the global DLL
972 static struct MeshClient *
973 client_get (struct GNUNET_SERVER_Client *client)
975 struct MeshClient *c;
980 if (c->handle == client)
989 * Checks if a given client has subscribed to certain message type
991 * @param message_type Type of message to check
992 * @param c Client to check
994 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
999 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1003 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1004 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1009 * Search for a tunnel among the tunnels for a client
1011 * @param c the client whose tunnels to search in
1012 * @param tid the local id of the tunnel
1014 * @return tunnel handler, NULL if doesn't exist
1016 static struct MeshTunnel *
1017 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1019 GNUNET_HashCode hash;
1021 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1022 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1027 * Search for a tunnel by global ID using PEER_ID
1029 * @param pi owner of the tunnel
1030 * @param tid global tunnel number
1032 * @return tunnel handler, NULL if doesn't exist
1034 static struct MeshTunnel *
1035 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1037 struct MESH_TunnelID id;
1038 GNUNET_HashCode hash;
1043 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1044 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1049 * Search for a tunnel by global ID using full PeerIdentities
1051 * @param oid owner of the tunnel
1052 * @param tid global tunnel number
1054 * @return tunnel handler, NULL if doesn't exist
1056 static struct MeshTunnel *
1057 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1059 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1064 * Callback used to notify a client owner of a tunnel that a peer has
1065 * disconnected, most likely because of a path change.
1067 * @param n Node in the tree representing the disconnected peer
1070 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1072 struct GNUNET_MESH_PeerControl msg;
1074 if (NULL == n->t->client || NULL == nc)
1077 msg.header.size = htons (sizeof (msg));
1078 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1079 msg.tunnel_id = htonl (n->t->local_tid);
1080 GNUNET_PEER_resolve (n->peer, &msg.peer);
1081 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1082 &msg.header, GNUNET_NO);
1087 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1088 * needed rescources.
1089 * If peer already exists, do nothing.
1091 * @param t Tunnel we want to add a new peer to
1092 * @param peer PeerInfo of the peer being added
1096 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1098 struct MeshPeerPath *p;
1099 struct MeshPeerPath *best_p;
1100 unsigned int best_cost;
1103 if (NULL != tree_find_peer(t->tree->root, peer->id))
1105 /* Already have it, nothing to do. */
1110 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1111 if (NULL == (p = peer->path_head))
1118 best_cost = UINT_MAX;
1121 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1128 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1129 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1130 t->path_refresh_task =
1131 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1136 * Notify a tunnel that a connection has broken that affects at least
1137 * some of its peers.
1139 * @param t Tunnel affected.
1140 * @param peer Peer that (at least) has been affected by the disconnection.
1141 * @param p1 Peer that got disconnected from p2.
1142 * @param p2 Peer that got disconnected from p1.
1144 * @return Short ID of the peer disconnected (either p1 or p2).
1145 * 0 if the tunnel remained unaffected.
1147 static GNUNET_PEER_Id
1148 tunnel_notify_connection_broken (struct MeshTunnel *t,
1149 struct MeshPeerInfo *peer,
1153 return tree_notify_connection_broken (t->tree, p1, p2,
1154 ¬ify_peer_disconnected);
1159 * Destroy the tunnel and free any allocated resources linked to it
1161 * @param t the tunnel to destroy
1163 * @return GNUNET_OK on success
1166 tunnel_destroy (struct MeshTunnel *t)
1168 struct MeshClient *c;
1169 struct MeshQueue *q;
1170 struct MeshQueue *qn;
1171 GNUNET_HashCode hash;
1174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1183 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1184 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1189 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1190 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1194 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1198 if (NULL != q->data)
1199 GNUNET_free (q->data);
1203 /* TODO cancel core transmit ready in case it was active */
1205 tree_destroy(t->tree);
1206 if (NULL != t->dht_get_type)
1207 GNUNET_DHT_get_stop(t->dht_get_type);
1208 t->dht_get_type = NULL;
1215 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1216 * client when the client disconnects.
1218 * @param cls closure (client that is disconnecting)
1219 * @param key the hash of the local tunnel id (used to access the hashmap)
1220 * @param value the value stored at the key (tunnel to destroy)
1222 * @return GNUNET_OK on success
1225 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1227 struct MeshTunnel *t = value;
1230 if (NULL != t->dht_get_type)
1232 GNUNET_DHT_get_stop (t->dht_get_type);
1234 r = tunnel_destroy (t);
1239 /******************************************************************************/
1240 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1241 /******************************************************************************/
1245 * Function called to notify a client about the socket
1246 * being ready to queue more data. "buf" will be
1247 * NULL and "size" zero if the socket was closed for
1248 * writing in the meantime.
1250 * @param cls closure
1251 * @param size number of bytes available in buf
1252 * @param buf where the callee should write the message
1253 * @return number of bytes written to buf
1256 send_core_create_path (void *cls, size_t size, void *buf)
1258 struct MeshPathInfo *info = cls;
1259 struct GNUNET_MESH_ManipulatePath *msg;
1260 struct GNUNET_PeerIdentity *peer_ptr;
1261 struct MeshPeerInfo *peer = info->peer;
1262 struct MeshTunnel *t = info->t;
1263 struct MeshPeerPath *p = info->path;
1268 sizeof (struct GNUNET_MESH_ManipulatePath) +
1269 p->length * sizeof (struct GNUNET_PeerIdentity);
1271 if (size < size_needed || NULL == buf)
1273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
1274 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
1275 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
1277 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1278 GNUNET_TIME_UNIT_FOREVER_REL,
1279 path_get_first_hop (t->tree, peer->id),
1281 &send_core_create_path,
1286 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1287 msg->header.size = htons (size_needed);
1288 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1289 msg->tid = ntohl (t->id.tid);
1291 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1292 for (i = 0; i < p->length; i++)
1294 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1301 "MESH: CREATE PATH (%u bytes long) sent!\n",
1309 * Function called to notify a client about the socket
1310 * being ready to queue more data. "buf" will be
1311 * NULL and "size" zero if the socket was closed for
1312 * writing in the meantime.
1314 * @param cls closure (MeshDataDescriptor with all info to build packet)
1315 * @param size number of bytes available in buf
1316 * @param buf where the callee should write the message
1317 * @return number of bytes written to buf
1320 send_core_data_to_origin (void *cls, size_t size, void *buf)
1322 struct MeshDataDescriptor *info = cls;
1323 struct GNUNET_MESH_ToOrigin *msg = buf;
1326 GNUNET_assert (NULL != info);
1327 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1328 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1330 if (total_size > size)
1332 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1333 "not enough buffer to send data to origin\n");
1336 msg->header.size = htons (total_size);
1337 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1338 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1339 msg->tid = htonl (info->origin->tid);
1340 if (0 != info->size)
1342 memcpy (&msg[1], &info[1], info->size);
1344 if (NULL != info->client)
1346 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1355 * Function called to notify a client about the socket
1356 * being ready to queue more data. "buf" will be
1357 * NULL and "size" zero if the socket was closed for
1358 * writing in the meantime.
1360 * @param cls closure (data itself)
1361 * @param size number of bytes available in buf
1362 * @param buf where the callee should write the message
1364 * @return number of bytes written to buf
1367 send_core_data_multicast (void *cls, size_t size, void *buf)
1369 struct MeshDataDescriptor *info = cls;
1370 struct GNUNET_MESH_Multicast *msg = buf;
1373 GNUNET_assert (NULL != info);
1374 GNUNET_assert (NULL != info->peer);
1375 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1376 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1378 if (total_size > size)
1381 struct GNUNET_PeerIdentity id;
1383 GNUNET_PEER_resolve(info->peer->id, &id);
1384 info->peer->infos[info->handler_n] = info;
1385 info->peer->types[info->handler_n] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1386 info->peer->core_transmit[info->handler_n] =
1387 GNUNET_CORE_notify_transmit_ready (core_handle,
1390 GNUNET_TIME_UNIT_FOREVER_REL,
1393 &send_core_data_multicast,
1397 info->peer->core_transmit[info->handler_n] = NULL;
1398 info->peer->infos[info->handler_n] = NULL;
1399 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1400 msg->header.size = htons (total_size);
1401 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1402 msg->tid = htonl (info->origin->tid);
1403 memcpy (&msg[1], info->data, info->size);
1404 if (0 == --(*info->copies))
1406 if (NULL != info->client)
1408 /* FIXME One unresponsive neighbor (who doesn't "call" tmt_rdy) can lock
1409 * the client from sending anything else to the service.
1410 * - Call receive_done after certain timeout.
1411 * - Here cancel the timeout.
1413 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1415 GNUNET_free (info->data);
1416 GNUNET_free (info->copies);
1424 * Function called to notify a client about the socket
1425 * being ready to queue more data. "buf" will be
1426 * NULL and "size" zero if the socket was closed for
1427 * writing in the meantime.
1429 * @param cls closure (MeshDataDescriptor)
1430 * @param size number of bytes available in buf
1431 * @param buf where the callee should write the message
1432 * @return number of bytes written to buf
1435 send_core_path_ack (void *cls, size_t size, void *buf)
1437 struct MeshDataDescriptor *info = cls;
1438 struct GNUNET_MESH_PathACK *msg = buf;
1440 GNUNET_assert (NULL != info);
1443 info->peer->core_transmit[info->handler_n] = NULL;
1445 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1450 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1451 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1452 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1453 msg->tid = htonl (info->origin->tid);
1454 msg->peer_id = my_full_id;
1456 /* TODO add signature */
1458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
1459 return sizeof (struct GNUNET_MESH_PathACK);
1464 * Function called to notify a client about the socket
1465 * being ready to queue more data. "buf" will be
1466 * NULL and "size" zero if the socket was closed for
1467 * writing in the meantime.
1469 * @param cls closure (data itself)
1470 * @param size number of bytes available in buf
1471 * @param buf where the callee should write the message
1472 * @return number of bytes written to buf
1475 send_core_data_raw (void *cls, size_t size, void *buf)
1477 struct GNUNET_MessageHeader *msg = cls;
1480 GNUNET_assert (NULL != msg);
1481 total_size = ntohs (msg->size);
1483 if (total_size > size)
1488 memcpy (buf, msg, total_size);
1496 * Send another peer a notification to destroy a tunnel
1497 * @param cls The tunnel to destroy
1498 * @param size Size in the buffer
1499 * @param buf Memory where to put the data to transmit
1500 * @return Size of data put in buffer
1503 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1505 struct MeshTunnel *t = cls;
1506 struct MeshClient *c;
1507 struct GNUNET_MESH_TunnelMessage *msg;
1511 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1512 /*FIXME*/ msg->header.size =
1513 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1514 msg->tunnel_id = htonl (t->id.tid);
1516 tunnel_destroy (c, t);
1517 return sizeof (struct GNUNET_MESH_TunnelMessage);
1523 * Send the message to all clients that have subscribed to its type
1525 * @param msg Pointer to the message itself
1526 * @return number of clients this message was sent to
1529 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1531 struct MeshClient *c;
1535 type = ntohs (msg->type);
1536 for (count = 0, c = clients; c != NULL; c = c->next)
1538 if (client_is_subscribed (type, c))
1541 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1551 * Notify the client that owns the tunnel that a peer has connected to it
1553 * @param t Tunnel whose owner to notify
1554 * @param id Short id of the peer that has connected
1557 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
1559 struct GNUNET_MESH_PeerControl pc;
1561 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1562 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1563 pc.tunnel_id = htonl (t->local_tid);
1564 GNUNET_PEER_resolve (id, &pc.peer);
1565 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1566 &pc.header, GNUNET_NO);
1570 /******************************************************************************/
1571 /******************** MESH NETWORK HANDLERS **************************/
1572 /******************************************************************************/
1576 * Core handler for path creation
1577 * struct GNUNET_CORE_MessageHandler
1579 * @param cls closure
1580 * @param message message
1581 * @param peer peer identity this notification is about
1582 * @param atsi performance data
1583 * @return GNUNET_OK to keep the connection open,
1584 * GNUNET_SYSERR to close it (signal serious error)
1588 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1589 const struct GNUNET_MessageHeader *message,
1590 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1592 unsigned int own_pos;
1595 MESH_TunnelNumber tid;
1596 struct GNUNET_MESH_ManipulatePath *msg;
1597 struct GNUNET_PeerIdentity *pi;
1598 struct GNUNET_PeerIdentity id;
1599 GNUNET_HashCode hash;
1600 struct MeshPeerPath *path;
1601 struct MeshPeerInfo *dest_peer_info;
1602 struct MeshPeerInfo *orig_peer_info;
1603 struct MeshTunnel *t;
1605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1606 "MESH: Received a path create msg\n");
1607 size = ntohs (message->size);
1608 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1610 GNUNET_break_op (0);
1614 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1615 if (size % sizeof (struct GNUNET_PeerIdentity))
1617 GNUNET_break_op (0);
1620 size /= sizeof (struct GNUNET_PeerIdentity);
1623 GNUNET_break_op (0);
1626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1627 "MESH: path as %u hops.\n",
1629 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1631 tid = ntohl (msg->tid);
1632 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1633 t = tunnel_get (pi, tid);
1634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1635 "MESH: path is for tunnel %s [%X].\n",
1640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1641 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1642 t->id.oid = GNUNET_PEER_intern (pi);
1644 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1645 t->local_tid = next_local_tid++;
1646 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
1648 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1650 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1651 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1658 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1659 if (NULL == dest_peer_info)
1661 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1662 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1663 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1665 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1667 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1668 if (NULL == orig_peer_info)
1670 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1671 orig_peer_info->id = GNUNET_PEER_intern (pi);
1672 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1673 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1676 path = path_new (size);
1678 for (i = 0; i < size; i++)
1680 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1681 if (path->peers[i] == myid)
1685 { /* cannot be self, must be 'not found' */
1686 /* create path: self not found in path through self */
1687 GNUNET_break_op (0);
1688 path_destroy (path);
1689 /* FIXME error. destroy tunnel? leave for timeout? */
1692 if (own_pos == size - 1)
1694 /* It is for us! Send ack. */
1695 struct GNUNET_MESH_TunnelNotification cmsg;
1696 struct MeshDataDescriptor *info;
1699 path_add_to_origin (orig_peer_info, path); /* inverts path! */
1700 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1701 info->origin = &t->id;
1702 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1703 GNUNET_assert (NULL != info->peer);
1704 for (j = 0; info->peer->core_transmit[j]; j++)
1706 if (j == (CORE_QUEUE_SIZE - 1))
1712 info->handler_n = j;
1713 info->peer->core_transmit[j] =
1714 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1715 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1716 sizeof (struct GNUNET_MESH_PathACK),
1717 &send_core_path_ack, info);
1718 cmsg.header.size = htons(sizeof(cmsg));
1719 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1720 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
1721 cmsg.tunnel_id = htonl(t->local_tid);
1722 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
1726 /* It's for somebody else! Retransmit. */
1727 struct MeshPathInfo *path_info;
1729 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1731 path_info->path = path;
1732 path_info->peer = dest_peer_info;
1734 path_add_to_peer (dest_peer_info, path);
1735 GNUNET_PEER_resolve (path->peers[own_pos + 1], &id);
1736 GNUNET_CORE_notify_transmit_ready (
1740 GNUNET_TIME_UNIT_FOREVER_REL,
1742 sizeof (struct GNUNET_MESH_ManipulatePath) +
1743 path->length * sizeof(struct GNUNET_PeerIdentity),
1744 &send_core_create_path,
1752 * Core handler for mesh network traffic going from the origin to a peer
1754 * @param cls closure
1755 * @param peer peer identity this notification is about
1756 * @param message message
1757 * @param atsi performance data
1758 * @return GNUNET_OK to keep the connection open,
1759 * GNUNET_SYSERR to close it (signal serious error)
1762 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1763 const struct GNUNET_MessageHeader *message,
1764 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1766 struct GNUNET_MESH_Unicast *msg;
1767 struct MeshTunnel *t;
1768 struct MeshPeerInfo *pi;
1771 size = ntohs (message->size);
1773 sizeof (struct GNUNET_MESH_Unicast) +
1774 sizeof (struct GNUNET_MessageHeader))
1779 msg = (struct GNUNET_MESH_Unicast *) message;
1780 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1783 /* TODO notify back: we don't know this tunnel */
1784 GNUNET_break_op (0);
1787 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1788 &msg->destination.hashPubKey);
1791 /* TODO maybe feedback, log to statistics */
1792 GNUNET_break_op (0);
1797 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1800 msg = GNUNET_malloc (size);
1801 memcpy (msg, message, size);
1802 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1803 GNUNET_TIME_UNIT_FOREVER_REL,
1804 path_get_first_hop (t->tree, pi->id),
1806 &send_core_data_raw, msg);
1812 * Core handler for mesh network traffic going from the origin to all peers
1814 * @param cls closure
1815 * @param message message
1816 * @param peer peer identity this notification is about
1817 * @param atsi performance data
1818 * @return GNUNET_OK to keep the connection open,
1819 * GNUNET_SYSERR to close it (signal serious error)
1821 * TODO: Check who we got this from, to validate route.
1824 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1825 const struct GNUNET_MessageHeader *message,
1826 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1828 struct GNUNET_MESH_Multicast *msg;
1829 struct GNUNET_PeerIdentity *id;
1830 struct MeshDataDescriptor *info;
1831 struct MeshTunnelTreeNode *n;
1832 struct MeshTunnel *t;
1833 unsigned int *copies;
1838 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Multicast);
1839 if (size < sizeof (struct GNUNET_MessageHeader))
1841 GNUNET_break_op (0);
1844 msg = (struct GNUNET_MESH_Multicast *) message;
1845 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1849 /* TODO notify that we dont know that tunnel */
1850 GNUNET_break_op (0);
1854 /* Transmit to locally interested clients */
1855 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
1857 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1859 n = t->tree->me->children_head;
1862 copies = GNUNET_malloc (sizeof (unsigned int));
1863 for (*copies = 0; NULL != n; n = n->next)
1865 n = t->tree->me->children_head;
1866 data = GNUNET_malloc (size);
1867 memcpy (data, &msg[1], size);
1870 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1871 info->origin = &t->id;
1874 info->copies = copies;
1875 info->client = t->client->handle;
1876 info->destination = n->peer;
1877 id = path_get_first_hop(t->tree, n->peer);
1878 info->peer = peer_info_get(id);
1879 GNUNET_assert (NULL != info->peer);
1880 for (i = 0; NULL != info->peer->core_transmit[i]; i++)
1882 if (i == (CORE_QUEUE_SIZE - 1))
1888 info->handler_n = i;
1889 info->peer->infos[i] = info;
1890 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1891 info->peer->core_transmit[i] =
1892 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1893 GNUNET_TIME_UNIT_FOREVER_REL, id,
1894 ntohs (msg->header.size),
1895 &send_core_data_multicast, info);
1903 * Core handler for mesh network traffic
1905 * @param cls closure
1906 * @param message message
1907 * @param peer peer identity this notification is about
1908 * @param atsi performance data
1910 * @return GNUNET_OK to keep the connection open,
1911 * GNUNET_SYSERR to close it (signal serious error)
1914 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
1915 const struct GNUNET_MessageHeader *message,
1916 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1918 struct GNUNET_MESH_ToOrigin *msg;
1919 struct GNUNET_PeerIdentity id;
1920 struct MeshPeerInfo *peer_info;
1921 struct MeshTunnel *t;
1924 size = ntohs (message->size);
1925 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
1926 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
1928 GNUNET_break_op (0);
1931 msg = (struct GNUNET_MESH_ToOrigin *) message;
1932 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1936 /* TODO notify that we dont know this tunnel (whom)? */
1940 if (t->id.oid == myid)
1942 if (NULL == t->client)
1944 /* got data packet for ownerless tunnel */
1945 GNUNET_break_op (0);
1948 /* TODO signature verification */
1949 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
1953 peer_info = peer_info_get (&msg->oid);
1954 if (NULL == peer_info)
1956 /* unknown origin of tunnel */
1960 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
1961 msg = GNUNET_malloc (size);
1962 memcpy (msg, message, size);
1963 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1964 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1965 &send_core_data_raw, msg);
1972 * Core handler for path ACKs
1974 * @param cls closure
1975 * @param message message
1976 * @param peer peer identity this notification is about
1977 * @param atsi performance data
1979 * @return GNUNET_OK to keep the connection open,
1980 * GNUNET_SYSERR to close it (signal serious error)
1983 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
1984 const struct GNUNET_MessageHeader *message,
1985 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1987 struct GNUNET_MESH_PathACK *msg;
1988 struct MeshTunnelTreeNode *n;
1989 struct MeshPeerInfo *peer_info;
1990 struct MeshTunnel *t;
1992 msg = (struct GNUNET_MESH_PathACK *) message;
1993 t = tunnel_get (&msg->oid, msg->tid);
1996 /* TODO notify that we don't know the tunnel */
2000 /* Message for us? */
2001 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2003 if (NULL == t->client)
2005 GNUNET_break_op (0);
2008 peer_info = peer_info_get (&msg->peer_id);
2009 if (NULL == peer_info)
2011 GNUNET_break_op (0);
2014 n = tree_find_peer(t->tree->root, peer_info->id);
2017 GNUNET_break_op (0);
2020 n->status = MESH_PEER_READY;
2021 send_client_peer_connected(t, peer_info->id);
2025 peer_info = peer_info_get (&msg->oid);
2026 if (NULL == peer_info)
2028 /* If we know the tunnel, we should DEFINITELY know the peer */
2032 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2033 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2034 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2035 GNUNET_TIME_UNIT_FOREVER_REL,
2036 path_get_first_hop (t->tree,
2038 sizeof (struct GNUNET_MESH_PathACK),
2039 &send_core_data_raw, msg);
2045 * Functions to handle messages from core
2047 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2048 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2049 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2050 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2051 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2052 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2053 sizeof (struct GNUNET_MESH_PathACK)},
2059 /******************************************************************************/
2060 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2061 /******************************************************************************/
2064 * deregister_app: iterator for removing each application registered by a client
2066 * @param cls closure
2067 * @param key the hash of the application id (used to access the hashmap)
2068 * @param value the value stored at the key (client)
2070 * @return GNUNET_OK on success
2073 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2075 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2081 * notify_client_connection_failure: notify a client that the connection to the
2082 * requested remote peer is not possible (for instance, no route found)
2083 * Function called when the socket is ready to queue more data. "buf" will be
2084 * NULL and "size" zero if the socket was closed for writing in the meantime.
2086 * @param cls closure
2087 * @param size number of bytes available in buf
2088 * @param buf where the callee should write the message
2089 * @return number of bytes written to buf
2092 notify_client_connection_failure (void *cls, size_t size, void *buf)
2095 struct MeshPeerInfo *peer_info;
2096 struct GNUNET_MESH_PeerControl *msg;
2097 struct GNUNET_PeerIdentity id;
2099 if (0 == size && NULL == buf)
2101 // TODO retry? cancel?
2105 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2106 peer_info = (struct MeshPeerInfo *) cls;
2107 msg = (struct GNUNET_MESH_PeerControl *) buf;
2108 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2109 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2110 // msg->tunnel_id = htonl(peer_info->t->tid);
2111 GNUNET_PEER_resolve (peer_info->id, &id);
2112 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2120 * Send keepalive packets for a peer
2122 * @param cls Closure (tunnel for which to send the keepalive).
2123 * @param tc Notification context.
2125 * TODO: implement explicit multicast keepalive?
2128 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2130 struct MeshTunnel *t = cls;
2131 struct GNUNET_MessageHeader *payload;
2132 struct GNUNET_MESH_Multicast *msg;
2135 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2136 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2142 "MESH: sending keepalive for tunnel %d\n",
2145 size = sizeof(struct GNUNET_MESH_Multicast) +
2146 sizeof(struct GNUNET_MessageHeader);
2147 msg = GNUNET_malloc (size);
2148 msg->header.size = htons (size);
2149 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2150 msg->oid = my_full_id;
2151 msg->tid = htonl(t->id.tid);
2152 payload = (struct GNUNET_MessageHeader *) &msg[1];
2153 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2154 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2155 handle_mesh_data_multicast (NULL, &my_full_id, &msg->header, NULL);
2158 t->path_refresh_task =
2159 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
2165 * Function to process paths received for a new peer addition. The recorded
2166 * paths form the initial tunnel, which can be optimized later.
2167 * Called on each result obtained for the DHT search.
2169 * @param cls closure
2170 * @param exp when will this value expire
2171 * @param key key of the result
2172 * @param type type of the result
2173 * @param size number of bytes in data
2174 * @param data pointer to the result data
2176 * TODO: re-issue the request after certain time? cancel after X results?
2179 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2180 const GNUNET_HashCode * key,
2181 const struct GNUNET_PeerIdentity *get_path,
2182 unsigned int get_path_length,
2183 const struct GNUNET_PeerIdentity *put_path,
2184 unsigned int put_path_length,
2185 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2187 struct MeshPathInfo *path_info = cls;
2188 struct MeshPathInfo *path_info_aux;
2189 struct MeshPeerPath *p;
2190 struct MeshPeerPath *aux;
2191 struct GNUNET_PeerIdentity pi;
2194 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2195 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2196 "MESH: Got results from DHT for %s\n",
2197 GNUNET_h2s_full(&pi.hashPubKey));
2198 GNUNET_DHT_get_stop(path_info->peer->dhtget);
2199 path_info->peer->dhtget = NULL;
2200 if (NULL == get_path || NULL == put_path)
2202 if (NULL == path_info->peer->path_head)
2204 // Find ourselves some alternate initial path to the destination: retry
2205 GNUNET_PEER_resolve(path_info->peer->id, &pi);
2206 path_info->peer->dhtget =
2207 GNUNET_DHT_get_start(dht_handle, /* handle */
2208 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2209 GNUNET_BLOCK_TYPE_TEST, /* type */
2210 &pi.hashPubKey, /*key to search */
2211 4, /* replication level */
2212 GNUNET_DHT_RO_RECORD_ROUTE |
2213 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2215 0, /* xquery bits */
2216 &dht_get_id_handler,
2217 (void *) path_info);
2222 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2223 path_add_to_peer (path_info->peer, p);
2224 for (i = 0; i < path_info->peer->ntunnels; i++)
2226 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2227 aux = tree_get_path_to_peer(path_info->peer->tunnels[i]->tree,
2228 path_info->peer->id);
2229 if (aux->length > 1)
2231 struct GNUNET_PeerIdentity id;
2233 path_info_aux = GNUNET_malloc (sizeof (struct MeshPathInfo));
2234 path_info_aux->path = aux;
2235 path_info_aux->peer = path_info->peer;
2236 path_info_aux->t = path_info->t;
2237 GNUNET_PEER_resolve (p->peers[1], &id);
2238 GNUNET_CORE_notify_transmit_ready (core_handle, /* handle */
2241 GNUNET_TIME_UNIT_FOREVER_REL,
2244 sizeof (struct GNUNET_MESH_ManipulatePath)
2247 sizeof (struct GNUNET_PeerIdentity)),
2249 &send_core_create_path,
2251 path_info_aux); /* cls */
2255 send_client_peer_connected(path_info->t, myid);
2258 GNUNET_free (path_info);
2265 * Function to process paths received for a new peer addition. The recorded
2266 * paths form the initial tunnel, which can be optimized later.
2267 * Called on each result obtained for the DHT search.
2269 * @param cls closure
2270 * @param exp when will this value expire
2271 * @param key key of the result
2272 * @param type type of the result
2273 * @param size number of bytes in data
2274 * @param data pointer to the result data
2277 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2278 const GNUNET_HashCode * key,
2279 const struct GNUNET_PeerIdentity *get_path,
2280 unsigned int get_path_length,
2281 const struct GNUNET_PeerIdentity *put_path,
2282 unsigned int put_path_length,
2283 enum GNUNET_BLOCK_Type type, size_t size,
2286 const struct GNUNET_PeerIdentity *pi = data;
2287 struct GNUNET_PeerIdentity id;
2288 struct MeshTunnel *t = cls;
2289 struct MeshPeerInfo *peer_info;
2290 struct MeshPathInfo *path_info;
2291 struct MeshPeerPath *p;
2294 if (size != sizeof (struct GNUNET_PeerIdentity))
2296 GNUNET_break_op (0);
2299 GNUNET_assert (NULL != t->client);
2300 GNUNET_DHT_get_stop (t->dht_get_type);
2301 t->dht_get_type = NULL;
2302 peer_info = peer_info_get (pi);
2303 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2304 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2306 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2307 NULL == peer_info->dhtget)
2309 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2310 path_info->peer = peer_info;
2312 /* we don't have a route to the peer, let's try a direct lookup */
2314 GNUNET_DHT_get_start (dht_handle, /* handle */
2315 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2316 GNUNET_BLOCK_TYPE_TEST, /* block type */
2317 &pi->hashPubKey, /* key to look up */
2318 10U, /* replication level */
2319 GNUNET_DHT_RO_RECORD_ROUTE |
2320 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2321 /* option to dht: record route */
2323 0, /* xquery bits */
2324 dht_get_id_handler, /* callback */
2325 path_info); /* closure */
2329 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2330 path_add_to_peer (peer_info, p);
2331 tunnel_add_peer(t, peer_info);
2332 p = tree_get_path_to_peer(t->tree, peer_info->id);
2334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2335 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2336 t->local_tid, p->length);
2337 for (i = 0; i < p->length; i++)
2339 GNUNET_PEER_resolve (p->peers[0], &id);
2340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2341 GNUNET_h2s_full (&id.hashPubKey));
2347 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2349 path_info->peer = peer_info;
2350 path_info->path = p;
2351 GNUNET_PEER_resolve (p->peers[1], &id);
2352 GNUNET_CORE_notify_transmit_ready (core_handle,
2358 GNUNET_TIME_UNIT_FOREVER_REL,
2362 sizeof (struct GNUNET_MESH_ManipulatePath)
2365 sizeof (struct GNUNET_PeerIdentity)),
2367 &send_core_create_path,
2369 path_info); /* cls */
2373 send_client_peer_connected(t, myid);
2377 /******************************************************************************/
2378 /********************* MESH LOCAL HANDLES **************************/
2379 /******************************************************************************/
2383 * Handler for client disconnection
2385 * @param cls closure
2386 * @param client identification of the client; NULL
2387 * for the last call when the server is destroyed
2390 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2392 struct MeshClient *c;
2393 struct MeshClient *next;
2395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2401 if (c->handle != client && NULL != client)
2403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2408 if (NULL != c->tunnels)
2410 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2411 &tunnel_destroy_iterator,
2413 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2416 /* deregister clients applications */
2417 if (NULL != c->apps)
2419 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2420 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2422 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2423 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2425 GNUNET_SCHEDULER_cancel (announce_applications_task);
2426 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2428 if (NULL != c->types)
2429 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2430 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2442 * Handler for new clients
2444 * @param cls closure
2445 * @param client identification of the client
2446 * @param message the actual message, which includes messages the client wants
2449 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2450 const struct GNUNET_MessageHeader *message)
2452 struct GNUNET_MESH_ClientConnect *cc_msg;
2453 struct MeshClient *c;
2454 GNUNET_MESH_ApplicationType *a;
2461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2462 /* Check data sanity */
2463 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2464 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2465 ntypes = ntohs (cc_msg->types);
2466 napps = ntohs (cc_msg->applications);
2468 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2471 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2475 /* Create new client structure */
2476 c = GNUNET_malloc (sizeof (struct MeshClient));
2478 c->id = next_client_id++;
2481 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2484 GNUNET_MESH_ApplicationType at;
2487 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2488 for (i = 0; i < napps; i++)
2491 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2492 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2493 /* store in clients hashmap */
2494 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2495 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2496 /* store in global hashmap, for announcements */
2497 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2498 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2500 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2501 announce_applications_task =
2502 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2510 t = (uint16_t *) & a[napps];
2511 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2512 for (i = 0; i < ntypes; i++)
2515 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2517 /* store in clients hashmap */
2518 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2519 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2520 /* store in global hashmap */
2521 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2522 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2526 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2528 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2529 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2530 GNUNET_SERVER_notification_context_add (nc, client);
2532 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2540 * Handler for requests of new tunnels
2542 * @param cls closure
2543 * @param client identification of the client
2544 * @param message the actual message
2547 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2548 const struct GNUNET_MessageHeader *message)
2550 struct GNUNET_MESH_TunnelMessage *t_msg;
2551 struct MeshTunnel *t;
2552 struct MeshClient *c;
2553 GNUNET_HashCode hash;
2555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2557 /* Sanity check for client registration */
2558 if (NULL == (c = client_get (client)))
2561 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2568 /* Message sanity check */
2569 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2572 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2576 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2577 /* Sanity check for tunnel numbering */
2578 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2581 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2584 /* Sanity check for duplicate tunnel IDs */
2585 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2588 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2592 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2594 while (NULL != tunnel_get_by_pi (myid, next_tid))
2595 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2596 t->id.tid = next_tid++;
2598 t->local_tid = ntohl (t_msg->tunnel_id);
2600 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2602 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2604 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2605 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2608 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2612 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2614 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2615 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2618 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2621 t->tree = tree_new (t, myid);
2622 t->tree->refresh = REFRESH_PATH_TIME;
2623 t->tree->root->status = MESH_PEER_READY;
2624 t->tree->me = t->tree->root;
2626 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2632 * Handler for requests of deleting tunnels
2634 * @param cls closure
2635 * @param client identification of the client
2636 * @param message the actual message
2639 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2640 const struct GNUNET_MessageHeader *message)
2642 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2643 struct MeshClient *c;
2644 struct MeshTunnel *t;
2645 MESH_TunnelNumber tid;
2646 GNUNET_HashCode hash;
2648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2650 /* Sanity check for client registration */
2651 if (NULL == (c = client_get (client)))
2654 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2657 /* Message sanity check */
2658 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2661 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2667 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2669 /* Retrieve tunnel */
2670 tid = ntohl (tunnel_msg->tunnel_id);
2672 /* Remove from local id hashmap */
2673 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2674 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2675 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2677 /* Remove from global id hashmap */
2678 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2679 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2681 // notify_tunnel_destroy(t); FIXME
2683 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2689 * Handler for connection requests to new peers
2691 * @param cls closure
2692 * @param client identification of the client
2693 * @param message the actual message (PeerControl)
2696 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2697 const struct GNUNET_MessageHeader *message)
2699 struct GNUNET_MESH_PeerControl *peer_msg;
2700 struct MeshPathInfo *path_info;
2701 struct MeshPeerInfo *peer_info;
2702 struct MeshClient *c;
2703 struct MeshTunnel *t;
2704 MESH_TunnelNumber tid;
2706 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
2707 /* Sanity check for client registration */
2708 if (NULL == (c = client_get (client)))
2711 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2715 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2716 /* Sanity check for message size */
2717 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2720 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2724 /* Tunnel exists? */
2725 tid = ntohl (peer_msg->tunnel_id);
2726 t = tunnel_get_by_local_id (c, tid);
2730 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2734 /* Does client own tunnel? */
2735 if (t->client->handle != client)
2738 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2741 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
2742 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
2743 peer_info = peer_info_get (&peer_msg->peer);
2745 /* Start DHT search if needed, otherwise just add peer to tunnel. */
2746 if (NULL == peer_info->dhtget && NULL == peer_info->path_head)
2748 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2749 path_info->peer = peer_info;
2752 GNUNET_DHT_get_start(dht_handle, /* handle */
2753 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2754 GNUNET_BLOCK_TYPE_TEST, /* type */
2755 &peer_msg->peer.hashPubKey, /*key to search */
2756 4, /* replication level */
2757 GNUNET_DHT_RO_RECORD_ROUTE |
2758 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2760 0, /* xquery bits */
2761 &dht_get_id_handler,
2762 (void *) path_info);
2764 else if (NULL != peer_info->path_head)
2767 for (i = 0; i < CORE_QUEUE_SIZE; i++)
2769 if (NULL == peer_info->core_transmit[i])
2772 if (CORE_QUEUE_SIZE == i)
2775 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2778 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2779 path_info->peer = peer_info;
2781 tunnel_add_peer(t, peer_info);
2782 path_info->path = tree_get_path_to_peer(t->tree, peer_info->id);
2783 peer_info = peer_info_get(path_get_first_hop(t->tree, path_info->peer->id));
2784 peer_info->infos[i] = path_info;
2785 peer_info->types[i] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
2786 peer_info->core_transmit[i] =
2787 GNUNET_CORE_notify_transmit_ready (
2791 GNUNET_TIME_UNIT_FOREVER_REL,
2792 path_get_first_hop(t->tree, path_info->peer->id),
2793 sizeof (struct GNUNET_MESH_ManipulatePath)
2794 + path_info->path->length * sizeof(struct GNUNET_PeerIdentity),
2795 &send_core_create_path,
2798 /* Otherwise: there is no path yet, but there is a DHT_get active already. */
2799 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2805 * Handler for disconnection requests of peers in a tunnel
2807 * @param cls closure
2808 * @param client identification of the client
2809 * @param message the actual message (PeerControl)
2812 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2813 const struct GNUNET_MessageHeader *message)
2815 struct GNUNET_MESH_PeerControl *peer_msg;
2816 struct MeshClient *c;
2817 struct MeshTunnel *t;
2818 MESH_TunnelNumber tid;
2820 /* Sanity check for client registration */
2821 if (NULL == (c = client_get (client)))
2824 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2827 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2828 /* Sanity check for message size */
2829 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2832 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2836 /* Tunnel exists? */
2837 tid = ntohl (peer_msg->tunnel_id);
2838 t = tunnel_get_by_local_id (c, tid);
2842 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2846 /* Does client own tunnel? */
2847 if (t->client->handle != client)
2850 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2854 /* Ok, delete peer from tunnel */
2855 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2856 &peer_msg->peer.hashPubKey);
2858 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2864 * Handler for connection requests to new peers by type
2866 * @param cls closure
2867 * @param client identification of the client
2868 * @param message the actual message (ConnectPeerByType)
2871 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2872 const struct GNUNET_MessageHeader *message)
2874 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2875 struct MeshClient *c;
2876 struct MeshTunnel *t;
2877 GNUNET_HashCode hash;
2878 MESH_TunnelNumber tid;
2880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
2881 /* Sanity check for client registration */
2882 if (NULL == (c = client_get (client)))
2885 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2889 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2890 /* Sanity check for message size */
2891 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
2892 ntohs (connect_msg->header.size))
2895 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2899 /* Tunnel exists? */
2900 tid = ntohl (connect_msg->tunnel_id);
2901 t = tunnel_get_by_local_id (c, tid);
2905 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2909 /* Does client own tunnel? */
2910 if (t->client->handle != client)
2913 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2917 /* Do WE have the service? */
2918 t->type = ntohl (connect_msg->type);
2919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
2920 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
2921 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
2924 /* Yes! Fast forward, add ourselves to the tunnel and send the
2925 * good news to the client
2927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
2928 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
2929 peer_info_get (&my_full_id),
2930 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
2933 send_client_peer_connected(t, myid);
2934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
2935 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2938 /* Ok, lets find a peer offering the service */
2939 if (NULL != t->dht_get_type)
2941 GNUNET_DHT_get_stop (t->dht_get_type);
2943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
2944 GNUNET_h2s_full (&hash));
2946 GNUNET_DHT_get_start (dht_handle,
2947 GNUNET_TIME_UNIT_FOREVER_REL,
2948 GNUNET_BLOCK_TYPE_TEST,
2951 GNUNET_DHT_RO_RECORD_ROUTE |
2952 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2954 &dht_get_type_handler, t);
2956 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2962 * Handler for client traffic directed to one peer
2964 * @param cls closure
2965 * @param client identification of the client
2966 * @param message the actual message
2969 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
2970 const struct GNUNET_MessageHeader *message)
2972 struct MeshClient *c;
2973 struct MeshTunnel *t;
2974 struct MeshPeerInfo *pi;
2975 struct GNUNET_MESH_Unicast *data_msg;
2976 MESH_TunnelNumber tid;
2979 /* Sanity check for client registration */
2980 if (NULL == (c = client_get (client)))
2983 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2986 data_msg = (struct GNUNET_MESH_Unicast *) message;
2987 /* Sanity check for message size */
2988 size = ntohs (message->size);
2989 if (sizeof (struct GNUNET_MESH_Unicast) +
2990 sizeof (struct GNUNET_MessageHeader) > size)
2993 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2997 /* Tunnel exists? */
2998 tid = ntohl (data_msg->tid);
2999 t = tunnel_get_by_local_id (c, tid);
3003 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3007 /* Is it a local tunnel? Then, does client own the tunnel? */
3008 if (t->client->handle != NULL && t->client->handle != client)
3011 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3015 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3016 &data_msg->destination.hashPubKey);
3017 /* Is the selected peer in the tunnel? */
3021 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3025 /* Ok, everything is correct, send the message
3026 * (pretend we got it from a mesh peer)
3029 char buf[ntohs (message->size)];
3030 struct GNUNET_MESH_Unicast *copy;
3032 /* Work around const limitation */
3033 copy = (struct GNUNET_MESH_Unicast *) buf;
3034 memcpy (buf, data_msg, size);
3035 copy->oid = my_full_id;
3036 copy->tid = htonl (t->id.tid);
3037 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL);
3039 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3044 * Handler for client traffic directed to all peers in a tunnel
3046 * @param cls closure
3047 * @param client identification of the client
3048 * @param message the actual message
3051 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3052 const struct GNUNET_MessageHeader *message)
3054 struct MeshClient *c;
3055 struct MeshTunnel *t;
3056 struct GNUNET_MESH_Multicast *data_msg;
3057 MESH_TunnelNumber tid;
3059 /* Sanity check for client registration */
3060 if (NULL == (c = client_get (client)))
3063 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3066 data_msg = (struct GNUNET_MESH_Multicast *) message;
3067 /* Sanity check for message size */
3068 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3071 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3075 /* Tunnel exists? */
3076 tid = ntohl (data_msg->tid);
3077 t = tunnel_get_by_local_id (c, tid);
3081 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3085 /* Does client own tunnel? */
3086 if (t->client->handle != client)
3089 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3094 char buf[ntohs(message->size)];
3095 struct GNUNET_MESH_Multicast *copy;
3097 copy = (struct GNUNET_MESH_Multicast *)buf;
3098 memcpy(buf, message, ntohs(message->size));
3099 copy->oid = my_full_id;
3100 copy->tid = htonl(t->id.tid);
3101 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL);
3104 /* receive done gets called when last copy is sent */
3109 * Functions to handle messages from clients
3111 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3112 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3113 {&handle_local_tunnel_create, NULL,
3114 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3115 sizeof (struct GNUNET_MESH_TunnelMessage)},
3116 {&handle_local_tunnel_destroy, NULL,
3117 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3118 sizeof (struct GNUNET_MESH_TunnelMessage)},
3119 {&handle_local_connect_add, NULL,
3120 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3121 sizeof (struct GNUNET_MESH_PeerControl)},
3122 {&handle_local_connect_del, NULL,
3123 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3124 sizeof (struct GNUNET_MESH_PeerControl)},
3125 {&handle_local_connect_by_type, NULL,
3126 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3127 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3128 {&handle_local_unicast, NULL,
3129 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3130 {&handle_local_unicast, NULL,
3131 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3132 {&handle_local_multicast, NULL,
3133 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3139 * To be called on core init/fail.
3141 * @param cls service closure
3142 * @param server handle to the server for this service
3143 * @param identity the public identity of this peer
3144 * @param publicKey the public key of this peer
3147 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3148 const struct GNUNET_PeerIdentity *identity,
3149 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
3151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3152 core_handle = server;
3153 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3155 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3156 GNUNET_SCHEDULER_shutdown();
3162 * Method called whenever a given peer connects.
3164 * @param cls closure
3165 * @param peer peer identity this notification is about
3166 * @param atsi performance data for the connection
3169 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3170 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3172 struct MeshPeerInfo *peer_info;
3173 struct MeshPeerPath *path;
3175 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3176 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3177 // GNUNET_h2s(&my_full_id.hashPubKey));
3178 peer_info = peer_info_get (peer);
3179 if (myid == peer_info->id)
3181 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3186 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3187 // GNUNET_h2s(&peer->hashPubKey));
3189 path = path_new (2);
3190 path->peers[0] = myid;
3191 path->peers[1] = peer_info->id;
3192 GNUNET_PEER_change_rc(myid, 1);
3193 GNUNET_PEER_change_rc(peer_info->id, 1);
3194 path_add_to_peer (peer_info, path);
3199 * Method called whenever a peer disconnects.
3201 * @param cls closure
3202 * @param peer peer identity this notification is about
3205 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3207 struct MeshPeerInfo *pi;
3210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3211 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3217 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3219 if (pi->core_transmit[i])
3221 struct MeshDataDescriptor *dd;
3222 struct MeshPathInfo *path_info;
3223 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
3224 /* TODO: notify that tranmission has failed */
3225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: data at %u\n", i);
3226 switch (pi->types[i])
3228 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3229 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3230 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
3233 if (0 == --(*dd->copies))
3235 GNUNET_free (dd->copies);
3236 GNUNET_free (dd->data);
3239 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
3241 path_info = pi->infos[i];
3242 path_destroy(path_info->path);
3245 GNUNET_free (pi->infos[i]);
3248 path_remove_from_peer (pi, pi->id, myid);
3251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3257 /******************************************************************************/
3258 /************************ MAIN FUNCTIONS ****************************/
3259 /******************************************************************************/
3262 * Iterator over hash map entries.
3264 * @param cls closure
3265 * @param key current key code
3266 * @param value value in the hash map
3267 * @return GNUNET_YES if we should continue to
3272 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
3274 struct MeshTunnel *t = value;
3280 * Task run during shutdown.
3286 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3289 /* TODO: destroy tunnels? */
3290 if (core_handle != NULL)
3292 GNUNET_CORE_disconnect (core_handle);
3295 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
3296 if (dht_handle != NULL)
3298 GNUNET_DHT_disconnect (dht_handle);
3303 GNUNET_SERVER_notification_context_destroy (nc);
3306 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3308 GNUNET_SCHEDULER_cancel (announce_id_task);
3309 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3315 * Process mesh requests.
3317 * @param cls closure
3318 * @param server the initialized server
3319 * @param c configuration to use
3322 run (void *cls, struct GNUNET_SERVER_Handle *server,
3323 const struct GNUNET_CONFIGURATION_Handle *c)
3325 struct MeshPeerInfo *peer;
3326 struct MeshPeerPath *p;
3329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3330 server_handle = server;
3331 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3332 CORE_QUEUE_SIZE, /* queue size */
3333 NULL, /* Closure passed to MESH functions */
3334 &core_init, /* Call core_init once connected */
3335 &core_connect, /* Handle connects */
3336 &core_disconnect, /* remove peers on disconnects */
3337 NULL, /* Do we care about "status" updates? */
3338 NULL, /* Don't notify about all incoming messages */
3339 GNUNET_NO, /* For header only in notification */
3340 NULL, /* Don't notify about all outbound messages */
3341 GNUNET_NO, /* For header-only out notification */
3342 core_handlers); /* Register these handlers */
3343 if (core_handle == NULL)
3346 GNUNET_SCHEDULER_shutdown ();
3351 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3354 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3356 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3357 GNUNET_SCHEDULER_shutdown ();
3360 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3361 GNUNET_free (keyfile);
3362 if (my_private_key == NULL)
3364 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3365 _("Mesh service could not access hostkey. Exiting.\n"));
3366 GNUNET_SCHEDULER_shutdown ();
3369 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3370 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3371 &my_full_id.hashPubKey);
3372 myid = GNUNET_PEER_intern (&my_full_id);
3374 dht_handle = GNUNET_DHT_connect (c, 64);
3375 if (dht_handle == NULL)
3381 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3383 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3384 peers = GNUNET_CONTAINER_multihashmap_create (32);
3385 applications = GNUNET_CONTAINER_multihashmap_create (32);
3386 types = GNUNET_CONTAINER_multihashmap_create (32);
3388 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3389 nc = GNUNET_SERVER_notification_context_create (server_handle,
3391 GNUNET_SERVER_disconnect_notify (server_handle,
3392 &handle_local_client_disconnect,
3397 clients_tail = NULL;
3402 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3403 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3405 /* Create a peer_info for the local peer */
3406 peer = peer_info_get(&my_full_id);
3409 path_add_to_peer(peer, p);
3411 /* Scheduled the task to clean up when shutdown is called */
3412 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3419 * The main function for the mesh service.
3421 * @param argc number of arguments from the command line
3422 * @param argv command line arguments
3423 * @return 0 ok, 1 on error
3426 main (int argc, char *const *argv)
3431 // fprintf (stderr, "main ()\n");
3433 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3436 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3440 // fprintf (stderr, "main () END\n");