2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - add connection confirmation message
44 * - handle trnsmt_rdy return values
49 #include "mesh_protocol.h"
50 #include "gnunet_dht_service.h"
51 #include "mesh_tunnel_tree.h"
53 /* TODO: move into configuration file */
54 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
55 GNUNET_TIME_UNIT_SECONDS,\
57 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
58 GNUNET_TIME_UNIT_SECONDS,\
61 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
62 GNUNET_TIME_UNIT_SECONDS,\
65 #define GET_RESTART_TIME GNUNET_TIME_relative_multiply(\
66 GNUNET_TIME_UNIT_SECONDS,\
69 /******************************************************************************/
70 /************************ DATA STRUCTURES ****************************/
71 /******************************************************************************/
73 /** FWD declaration */
77 * Struct containing all info possibly needed to build a package when called
80 struct MeshDataDescriptor
82 /** ID of the tunnel this packet travels in */
83 struct MESH_TunnelID *origin;
88 /** Client that asked for the transmission, if any */
89 struct GNUNET_SERVER_Client *client;
91 /** Who was this message being sent to */
92 struct MeshPeerInfo *peer;
94 /** Ultimate destination of the packet */
95 GNUNET_PEER_Id destination;
97 /** Number of identical messages sent to different hops (multicast) */
100 /** Which handler was used to request the transmission */
101 unsigned int handler_n;
103 /** Size of the data */
110 * Struct containing all information regarding a given peer
120 * Last time we heard from this peer
122 struct GNUNET_TIME_Absolute last_contact;
125 * Number of attempts to reconnect so far
127 int n_reconnect_attempts;
130 * Paths to reach the peer, ordered by ascending hop count
132 struct MeshPeerPath *path_head;
135 * Paths to reach the peer, ordered by ascending hop count
137 struct MeshPeerPath *path_tail;
140 * Handle to stop the DHT search for a path to this peer
142 struct GNUNET_DHT_GetHandle *dhtget;
145 * Handles to stop queued transmissions for this peer
147 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
150 * Pointer to info stuctures used as cls for queued transmissions
152 void *infos[CORE_QUEUE_SIZE];
155 * Type of message being in each transmission
157 uint16_t types[CORE_QUEUE_SIZE];
160 * Array of tunnels this peer participates in
161 * (most probably a small amount, therefore not a hashmap)
162 * When the path to the peer changes, notify these tunnels to let them
163 * re-adjust their path trees.
165 struct MeshTunnel **tunnels;
168 * Number of tunnels this peers participates in
170 unsigned int ntunnels;
175 * Data scheduled to transmit (to local client or remote peer)
182 struct MeshQueue *next;
183 struct MeshQueue *prev;
186 * Target of the data (NULL if target is client)
188 struct MeshPeerInfo *peer;
191 * Client to send the data to (NULL if target is peer)
193 struct MeshClient *client;
196 * Size of the message to transmit
201 * How old is the data?
203 struct GNUNET_TIME_Absolute timestamp;
208 struct GNUNET_MessageHeader *data;
212 * Globally unique tunnel identification (owner + number)
213 * DO NOT USE OVER THE NETWORK
218 * Node that owns the tunnel
223 * Tunnel number to differentiate all the tunnels owned by the node oid
224 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
226 MESH_TunnelNumber tid;
230 struct MeshClient; /* FWD declaration */
233 * Struct containing all information regarding a tunnel
234 * For an intermediate node the improtant info used will be:
235 * - id Tunnel unique identification
236 * - paths[0] To know where to send it next
237 * - metainfo: ready, speeds, accounting
244 struct MESH_TunnelID id;
247 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
249 MESH_TunnelNumber local_tid;
252 * Last time the tunnel was used
254 struct GNUNET_TIME_Absolute timestamp;
257 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
259 struct GNUNET_CONTAINER_MultiHashMap *peers;
262 * Number of peers that are connected and potentially ready to receive data
264 unsigned int peers_ready;
267 * Number of peers that have been added to the tunnel
269 unsigned int peers_total;
272 * Client owner of the tunnel, if any
274 struct MeshClient *client;
277 * Messages ready to transmit
279 struct MeshQueue *queue_head;
280 struct MeshQueue *queue_tail;
285 struct MeshTunnelTree *tree;
288 * Application type we are looking for in this tunnel
290 GNUNET_MESH_ApplicationType type;
293 * Used to search peers offering a service
295 struct GNUNET_DHT_GetHandle *dht_get_type;
298 * Task to keep the used paths alive
300 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
305 * Info needed to work with tunnel paths and peers
312 struct MeshTunnel *t;
317 struct MeshPeerInfo *peer;
322 struct MeshPeerPath *path;
325 * Position in peer's transmit queue
332 * Struct containing information about a client of the service
339 struct MeshClient *next;
340 struct MeshClient *prev;
343 * Tunnels that belong to this client, indexed by local id
345 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
348 * Handle to communicate with the client
350 struct GNUNET_SERVER_Client *handle;
353 * Applications that this client has claimed to provide
355 struct GNUNET_CONTAINER_MultiHashMap *apps;
358 * Messages that this client has declared interest in
360 struct GNUNET_CONTAINER_MultiHashMap *types;
364 * ID of the client, for debug messages
373 /******************************************************************************/
374 /************************ DEBUG FUNCTIONS ****************************/
375 /******************************************************************************/
379 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
380 * @param cls string to print
381 * @param tc task context
384 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
388 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
396 /******************************************************************************/
397 /*********************** GLOBAL VARIABLES ****************************/
398 /******************************************************************************/
403 static struct MeshClient *clients;
404 static struct MeshClient *clients_tail;
407 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
409 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
412 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
414 static struct GNUNET_CONTAINER_MultiHashMap *peers;
417 * Handle to communicate with core
419 static struct GNUNET_CORE_Handle *core_handle;
424 static struct GNUNET_DHT_Handle *dht_handle;
429 static struct GNUNET_SERVER_Handle *server_handle;
432 * Notification context, to send messages to local clients
434 static struct GNUNET_SERVER_NotificationContext *nc;
437 * Local peer own ID (memory efficient handle)
439 static GNUNET_PEER_Id myid;
442 * Local peer own ID (full value)
444 static struct GNUNET_PeerIdentity my_full_id;
449 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
454 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
457 * Tunnel ID for the next created tunnel (global tunnel number)
459 static MESH_TunnelNumber next_tid;
462 * Tunnel ID for the next incoming tunnel (local tunnel number)
464 static MESH_TunnelNumber next_local_tid;
467 * All application types provided by this peer
469 static struct GNUNET_CONTAINER_MultiHashMap *applications;
472 * All message types clients of this peer are interested in
474 static struct GNUNET_CONTAINER_MultiHashMap *types;
477 * Task to periodically announce provided applications
479 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
482 * Task to periodically announce itself in the network
484 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
487 unsigned int next_client_id;
491 /******************************************************************************/
492 /************************ ITERATORS ****************************/
493 /******************************************************************************/
495 /* FIXME move iterators here */
498 /******************************************************************************/
499 /************************ PERIODIC FUNCTIONS ****************************/
500 /******************************************************************************/
503 * Announce iterator over for each application provided by the peer
506 * @param key current key code
507 * @param value value in the hash map
508 * @return GNUNET_YES if we should continue to
513 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
515 /* FIXME are hashes in multihash map equal on all aquitectures? */
516 GNUNET_DHT_put (dht_handle,
519 GNUNET_DHT_RO_RECORD_ROUTE |
520 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
521 GNUNET_BLOCK_TYPE_TEST,
522 sizeof (struct GNUNET_PeerIdentity),
523 (const char *) &my_full_id,
525 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
526 &mesh_debug, "DHT_put for app completed");
528 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
530 APP_ANNOUNCE_TIME, NULL, NULL);
537 * Periodically announce what applications are provided by local clients
540 * @param tc task context
543 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
545 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
547 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
551 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
553 announce_applications_task =
554 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
562 * Periodically announce self id in the DHT
565 * @param tc task context
568 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
570 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
572 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
576 * - Set data expiration in function of X
579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
580 GNUNET_h2s_full (&my_full_id.hashPubKey));
581 GNUNET_DHT_put (dht_handle, /* DHT handle */
582 &my_full_id.hashPubKey, /* Key to use */
583 10U, /* Replication level */
584 GNUNET_DHT_RO_RECORD_ROUTE |
585 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
586 GNUNET_BLOCK_TYPE_TEST, /* Block type */
587 sizeof(my_full_id), /* Size of the data */
588 (char *)&my_full_id, /* Data itself */
589 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
590 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
592 &mesh_debug, "DHT_put for id completed");
594 NULL, /* Continuation */
595 NULL); /* Continuation closure */
598 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
603 * Function to process paths received for a new peer addition. The recorded
604 * paths form the initial tunnel, which can be optimized later.
605 * Called on each result obtained for the DHT search.
608 * @param exp when will this value expire
609 * @param key key of the result
610 * @param type type of the result
611 * @param size number of bytes in data
612 * @param data pointer to the result data
615 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
616 const GNUNET_HashCode * key,
617 const struct GNUNET_PeerIdentity *get_path,
618 unsigned int get_path_length,
619 const struct GNUNET_PeerIdentity *put_path,
620 unsigned int put_path_length,
621 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
624 /******************************************************************************/
625 /****************** GENERAL HELPER FUNCTIONS ************************/
626 /******************************************************************************/
629 * Check if client has registered with the service and has not disconnected
631 * @param client the client to check
633 * @return non-NULL if client exists in the global DLL
635 static struct MeshClient *
636 client_get (struct GNUNET_SERVER_Client *client)
638 struct MeshClient *c;
643 if (c->handle == client)
652 * Checks if a given client has subscribed to certain message type
654 * @param message_type Type of message to check
655 * @param c Client to check
657 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
662 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
666 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
667 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
672 * Send the message to all clients that have subscribed to its type
674 * @param msg Pointer to the message itself
675 * @return number of clients this message was sent to
678 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
680 struct MeshClient *c;
684 type = ntohs (msg->type);
685 for (count = 0, c = clients; c != NULL; c = c->next)
687 if (client_is_subscribed (type, c))
690 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
699 * Notify the client that owns the tunnel that a peer has connected to it
701 * @param t Tunnel whose owner to notify
702 * @param id Short id of the peer that has connected
705 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
707 struct GNUNET_MESH_PeerControl pc;
709 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
710 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
711 pc.tunnel_id = htonl (t->local_tid);
712 GNUNET_PEER_resolve (id, &pc.peer);
713 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
714 &pc.header, GNUNET_NO);
719 * Cancel a core transmission that was already requested and free all resources
720 * associated to the request.
722 * @param peer PeeInfo of the peer whose transmission is cancelled.
723 * @param i Position of the transmission to be cancelled.
726 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
728 if (peer->core_transmit[i])
730 struct MeshDataDescriptor *dd;
731 struct MeshPathInfo *path_info;
732 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
733 /* TODO: notify that tranmission has failed */
734 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
735 "MESH: Cancelled data transmission at %u\n",
737 switch (peer->types[i])
739 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
740 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
741 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
744 if (0 == --(*dd->copies))
746 GNUNET_free (dd->copies);
747 GNUNET_free (dd->data);
750 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
752 path_info = peer->infos[i];
753 path_destroy(path_info->path);
756 GNUNET_free (peer->infos[i]);
765 peer_info_transmit_position (struct MeshPeerInfo *peer)
769 for (i = 0; peer->core_transmit[i]; i++)
771 if (i == (CORE_QUEUE_SIZE - 1))
773 /* All positions are taken! Overwriting! */
775 peer_info_cancel_transmission(peer, 0);
784 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
785 * and insert it in the appropiate structures if the peer is not known yet.
787 * @param peer Full identity of the peer.
789 * @return Existing or newly created peer info.
791 static struct MeshPeerInfo *
792 peer_info_get (const struct GNUNET_PeerIdentity *peer)
794 struct MeshPeerInfo *peer_info;
796 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
797 if (NULL == peer_info)
800 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
801 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
802 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
803 peer_info->id = GNUNET_PEER_intern (peer);
811 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
812 * and insert it in the appropiate structures if the peer is not known yet.
814 * @param peer Short identity of the peer.
816 * @return Existing or newly created peer info.
818 static struct MeshPeerInfo *
819 peer_info_get_short (const GNUNET_PEER_Id peer)
821 struct GNUNET_PeerIdentity id;
823 GNUNET_PEER_resolve(peer, &id);
824 return peer_info_get(&id);
829 * Function called to notify a client about the socket
830 * being ready to queue more data. "buf" will be
831 * NULL and "size" zero if the socket was closed for
832 * writing in the meantime.
835 * @param size number of bytes available in buf
836 * @param buf where the callee should write the message
837 * @return number of bytes written to buf
840 send_core_create_path (void *cls, size_t size, void *buf);
844 * Try to establish a new connection to this peer.
845 * Use the best path for the given tunnel.
846 * If the peer doesn't have any path to it yet, try to get one.
847 * If the peer already has some path, send a CREATE PATH towards it.
849 * @param peer PeerInfo of the peer.
850 * @param t Tunnel for which to create the path, if possible.
853 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
855 struct MeshPeerPath *p;
856 struct MeshPathInfo *path_info;
857 struct MeshPeerInfo *neighbor;
859 if (NULL != peer->path_head)
861 p = tree_get_path_to_peer(t->tree, peer->id);
864 struct GNUNET_PeerIdentity *id;
866 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
868 path_info->peer = peer;
870 id = path_get_first_hop(t->tree, peer->id);
871 neighbor = peer_info_get(id);
872 path_info->pos = peer_info_transmit_position(neighbor);
873 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
874 neighbor->infos[path_info->pos] = path_info;
875 neighbor->core_transmit[path_info->pos] =
876 GNUNET_CORE_notify_transmit_ready (
877 core_handle, /* handle */
880 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
882 sizeof (struct GNUNET_MESH_ManipulatePath)
883 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
884 &send_core_create_path, /* callback */
885 path_info); /* cls */
889 send_client_peer_connected(t, myid);
892 else if (NULL == peer->dhtget)
894 struct GNUNET_PeerIdentity id;
896 GNUNET_PEER_resolve(peer->id, &id);
897 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
898 path_info->peer = peer;
901 GNUNET_DHT_get_start(dht_handle, /* handle */
902 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
903 GNUNET_BLOCK_TYPE_TEST, /* type */
904 &id.hashPubKey, /* key to search */
905 4, /* replication level */
906 GNUNET_DHT_RO_RECORD_ROUTE |
907 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
913 /* Otherwise, there is no path but the DHT get is already started. */
919 * Destroy the peer_info and free any allocated resources linked to it
920 * @param t tunnel the path belongs to
921 * @param pi the peer_info to destroy
922 * @return GNUNET_OK on success
925 peer_info_destroy (struct MeshPeerInfo *pi)
927 GNUNET_HashCode hash;
928 struct GNUNET_PeerIdentity id;
930 GNUNET_PEER_resolve (pi->id, &id);
931 GNUNET_PEER_change_rc (pi->id, -1);
932 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
934 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
935 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
943 * Notify a tunnel that a connection has broken that affects at least
946 * @param t Tunnel affected.
947 * @param peer Peer that (at least) has been affected by the disconnection.
948 * @param p1 Peer that got disconnected from p2.
949 * @param p2 Peer that got disconnected from p1.
951 * @return Short ID of the peer disconnected (either p1 or p2).
952 * 0 if the tunnel remained unaffected.
954 static GNUNET_PEER_Id
955 tunnel_notify_connection_broken (struct MeshTunnel *t,
956 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
960 * Remove all paths that rely on a direct connection between p1 and p2
961 * from the peer itself and notify all tunnels about it.
963 * @param peer PeerInfo of affected peer.
964 * @param p1 GNUNET_PEER_Id of one peer.
965 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
968 * TODO: optimize (see below)
971 path_remove_from_peer (struct MeshPeerInfo *peer,
975 struct GNUNET_PeerIdentity id;
976 struct MeshPeerPath *p;
977 struct MeshPeerPath *aux;
978 struct MeshPeerInfo *peer_d;
980 unsigned int destroyed;
990 for (i = 0; i < (p->length - 1); i++)
992 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
993 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1005 for (i = 0; i < peer->ntunnels; i++)
1007 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
1009 * Problem: one or more peers have been deleted from the tunnel tree.
1010 * We don't know who they are to try to add them again.
1011 * We need to try to find a new path for each of the disconnected peers.
1012 * Some of them might already have a path to reach them that does not
1013 * involve p1 and p2. Adding all anew might render in a better tree than
1014 * the trivial immediate fix.
1016 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1017 * its children will be reachable trough him.
1019 peer_d = peer_info_get_short(d);
1022 for (p = peer_d->path_head; NULL != p; p = p->next)
1024 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1032 /* No callback, as peer will be already disconnected */
1033 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1037 struct MeshPathInfo *path_info;
1039 if (NULL != peer_d->dhtget)
1041 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1042 path_info->path = p;
1043 path_info->peer = peer_d;
1044 path_info->t = peer->tunnels[i];
1046 GNUNET_DHT_get_start(dht_handle, /* handle */
1047 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1048 GNUNET_BLOCK_TYPE_TEST, /* type */
1049 &id.hashPubKey, /*key to search */
1050 4, /* replication level */
1051 GNUNET_DHT_RO_RECORD_ROUTE |
1052 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1054 0, /* xquery bits */
1055 &dht_get_id_handler,
1056 (void *) path_info);
1063 * Add the path to the peer and update the path used to reach it in case this
1066 * @param peer_info Destination peer to add the path to.
1067 * @param path New path to add. Last peer must be the peer in arg 1.
1068 * Path will be either used of freed if already known.
1070 * TODO: trim the part from origin to us? Add it as path to origin?
1073 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1075 struct MeshPeerPath *aux;
1079 if (NULL == peer_info || NULL == path)
1085 l = path_get_length (path);
1092 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1094 l2 = path_get_length (aux);
1097 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1098 peer_info->path_tail, aux, path);
1102 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1109 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1116 * Add the path to the origin peer and update the path used to reach it in case
1117 * this is the shortest.
1118 * The path is given in peer_info -> destination, therefore we turn the path
1119 * upside down first.
1121 * @param peer_info Peer to add the path to, being the origin of the path.
1122 * @param path New path to add after being inversed.
1125 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1128 path_add_to_peer (peer_info, path);
1133 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1134 * to obtain a local peer -> destination path and interning the peer ids.
1136 * @return Newly allocated and created path
1138 static struct MeshPeerPath *
1139 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1140 unsigned int get_path_length,
1141 const struct GNUNET_PeerIdentity *put_path,
1142 unsigned int put_path_length)
1144 struct MeshPeerPath *p;
1150 GNUNET_PEER_change_rc(myid, 1);
1151 i = get_path_length;
1152 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1153 for (i--; i >= 0; i--)
1155 id = GNUNET_PEER_intern (&get_path[i]);
1156 if (p->length > 0 && id == p->peers[p->length - 1])
1158 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1159 GNUNET_PEER_change_rc(id, -1);
1163 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1164 "MESH: Adding from GET: %s.\n",
1165 GNUNET_i2s(&get_path[i]));
1167 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1168 p->peers[p->length - 1] = id;
1171 i = put_path_length;
1172 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1173 for (i--; i >= 0; i--)
1175 id = GNUNET_PEER_intern (&put_path[i]);
1178 /* PUT path went through us, so discard the path up until now and start
1179 * from here to get a much shorter (and loop-free) path.
1184 if (p->length > 0 && id == p->peers[p->length - 1])
1186 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1187 GNUNET_PEER_change_rc(id, -1);
1191 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1192 "MESH: Adding from PUT: %s.\n",
1193 GNUNET_i2s(&put_path[i]));
1195 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1196 p->peers[p->length - 1] = id;
1200 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1201 "MESH: (first of GET: %s)\n",
1202 GNUNET_h2s_full(&get_path[0].hashPubKey));
1203 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1204 "MESH: (first of PUT: %s)\n",
1205 GNUNET_h2s_full(&put_path[0].hashPubKey));
1206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1207 "MESH: In total: %d hops\n",
1209 for (i = 0; i < p->length; i++)
1211 struct GNUNET_PeerIdentity peer_id;
1213 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1217 GNUNET_h2s_full(&peer_id.hashPubKey));
1225 * Send keepalive packets for a peer
1227 * @param cls Closure (tunnel for which to send the keepalive).
1228 * @param tc Notification context.
1230 * TODO: implement explicit multicast keepalive?
1233 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1237 * Search for a tunnel among the tunnels for a client
1239 * @param c the client whose tunnels to search in
1240 * @param tid the local id of the tunnel
1242 * @return tunnel handler, NULL if doesn't exist
1244 static struct MeshTunnel *
1245 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1247 GNUNET_HashCode hash;
1249 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1250 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1255 * Search for a tunnel by global ID using PEER_ID
1257 * @param pi owner of the tunnel
1258 * @param tid global tunnel number
1260 * @return tunnel handler, NULL if doesn't exist
1262 static struct MeshTunnel *
1263 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1265 struct MESH_TunnelID id;
1266 GNUNET_HashCode hash;
1271 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1272 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1277 * Search for a tunnel by global ID using full PeerIdentities
1279 * @param oid owner of the tunnel
1280 * @param tid global tunnel number
1282 * @return tunnel handler, NULL if doesn't exist
1284 static struct MeshTunnel *
1285 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1287 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1292 * Callback used to notify a client owner of a tunnel that a peer has
1293 * disconnected, most likely because of a path change.
1295 * @param n Node in the tree representing the disconnected peer
1298 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1300 struct MeshPeerInfo *peer;
1302 if (NULL != n->t->client && NULL != nc)
1304 struct GNUNET_MESH_PeerControl msg;
1305 msg.header.size = htons (sizeof (msg));
1306 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1307 msg.tunnel_id = htonl (n->t->local_tid);
1308 GNUNET_PEER_resolve (n->peer, &msg.peer);
1309 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1310 &msg.header, GNUNET_NO);
1312 peer = peer_info_get_short(n->peer);
1313 peer_info_connect(peer, n->t);
1318 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1319 * needed rescources.
1320 * If peer already exists, reevaluate shortest path and change if different.
1322 * @param t Tunnel we want to add a new peer to
1323 * @param peer PeerInfo of the peer being added
1327 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1329 struct GNUNET_PeerIdentity id;
1330 struct MeshPeerPath *best_p;
1331 struct MeshPeerPath *p;
1332 unsigned int best_cost;
1335 GNUNET_PEER_resolve(peer->id, &id);
1337 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1340 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1341 GNUNET_CONTAINER_multihashmap_put(
1345 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1348 if (NULL != (p = peer->path_head))
1351 best_cost = UINT_MAX;
1354 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1361 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1362 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1363 t->path_refresh_task =
1364 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1368 /* Start a DHT get if necessary */
1369 peer_info_connect(peer, t);
1375 * Notify a tunnel that a connection has broken that affects at least
1376 * some of its peers.
1378 * @param t Tunnel affected.
1379 * @param peer Peer that (at least) has been affected by the disconnection.
1380 * @param p1 Peer that got disconnected from p2.
1381 * @param p2 Peer that got disconnected from p1.
1383 * @return Short ID of the peer disconnected (either p1 or p2).
1384 * 0 if the tunnel remained unaffected.
1386 static GNUNET_PEER_Id
1387 tunnel_notify_connection_broken (struct MeshTunnel *t,
1388 struct MeshPeerInfo *peer,
1392 return tree_notify_connection_broken (t->tree, p1, p2,
1393 ¬ify_peer_disconnected);
1398 * Destroy the tunnel and free any allocated resources linked to it
1400 * @param t the tunnel to destroy
1402 * @return GNUNET_OK on success
1405 tunnel_destroy (struct MeshTunnel *t)
1407 struct MeshClient *c;
1408 struct MeshQueue *q;
1409 struct MeshQueue *qn;
1410 GNUNET_HashCode hash;
1413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1422 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1423 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1428 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1429 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1433 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1437 if (NULL != q->data)
1438 GNUNET_free (q->data);
1442 /* TODO cancel core transmit ready in case it was active */
1444 tree_destroy(t->tree);
1445 if (NULL != t->dht_get_type)
1446 GNUNET_DHT_get_stop(t->dht_get_type);
1447 t->dht_get_type = NULL;
1454 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1455 * client when the client disconnects.
1457 * @param cls closure (client that is disconnecting)
1458 * @param key the hash of the local tunnel id (used to access the hashmap)
1459 * @param value the value stored at the key (tunnel to destroy)
1461 * @return GNUNET_OK on success
1464 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1466 struct MeshTunnel *t = value;
1469 if (NULL != t->dht_get_type)
1471 GNUNET_DHT_get_stop (t->dht_get_type);
1473 r = tunnel_destroy (t);
1478 /******************************************************************************/
1479 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1480 /******************************************************************************/
1483 * Function called to notify a client about the socket
1484 * being ready to queue more data. "buf" will be
1485 * NULL and "size" zero if the socket was closed for
1486 * writing in the meantime.
1488 * @param cls closure
1489 * @param size number of bytes available in buf
1490 * @param buf where the callee should write the message
1491 * @return number of bytes written to buf
1494 send_core_create_path (void *cls, size_t size, void *buf)
1496 struct MeshPathInfo *info = cls;
1497 struct GNUNET_MESH_ManipulatePath *msg;
1498 struct GNUNET_PeerIdentity *peer_ptr;
1499 struct MeshPeerInfo *peer = info->peer;
1500 struct MeshTunnel *t = info->t;
1501 struct MeshPeerPath *p = info->path;
1506 sizeof (struct GNUNET_MESH_ManipulatePath) +
1507 p->length * sizeof (struct GNUNET_PeerIdentity);
1509 if (size < size_needed || NULL == buf)
1511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
1512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
1513 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
1515 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1516 GNUNET_TIME_UNIT_FOREVER_REL,
1517 path_get_first_hop (t->tree, peer->id),
1519 &send_core_create_path,
1524 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1525 msg->header.size = htons (size_needed);
1526 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1527 msg->tid = ntohl (t->id.tid);
1529 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1530 for (i = 0; i < p->length; i++)
1532 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1539 "MESH: CREATE PATH (%u bytes long) sent!\n",
1547 * Function called to notify a client about the socket
1548 * being ready to queue more data. "buf" will be
1549 * NULL and "size" zero if the socket was closed for
1550 * writing in the meantime.
1552 * @param cls closure (MeshDataDescriptor with all info to build packet)
1553 * @param size number of bytes available in buf
1554 * @param buf where the callee should write the message
1555 * @return number of bytes written to buf
1558 send_core_data_to_origin (void *cls, size_t size, void *buf)
1560 struct MeshDataDescriptor *info = cls;
1561 struct GNUNET_MESH_ToOrigin *msg = buf;
1564 GNUNET_assert (NULL != info);
1565 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1566 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1568 if (total_size > size)
1570 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1571 "not enough buffer to send data to origin\n");
1574 msg->header.size = htons (total_size);
1575 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1576 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1577 msg->tid = htonl (info->origin->tid);
1578 if (0 != info->size)
1580 memcpy (&msg[1], &info[1], info->size);
1582 if (NULL != info->client)
1584 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1593 * Function called to notify a client about the socket
1594 * being ready to queue more data. "buf" will be
1595 * NULL and "size" zero if the socket was closed for
1596 * writing in the meantime.
1598 * @param cls closure (data itself)
1599 * @param size number of bytes available in buf
1600 * @param buf where the callee should write the message
1602 * @return number of bytes written to buf
1605 send_core_data_multicast (void *cls, size_t size, void *buf)
1607 struct MeshDataDescriptor *info = cls;
1608 struct GNUNET_MESH_Multicast *msg = buf;
1611 GNUNET_assert (NULL != info);
1612 GNUNET_assert (NULL != info->peer);
1613 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1614 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1616 if (total_size > size)
1619 struct GNUNET_PeerIdentity id;
1621 GNUNET_PEER_resolve(info->peer->id, &id);
1622 info->peer->infos[info->handler_n] = info;
1623 info->peer->types[info->handler_n] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1624 info->peer->core_transmit[info->handler_n] =
1625 GNUNET_CORE_notify_transmit_ready (core_handle,
1628 GNUNET_TIME_UNIT_FOREVER_REL,
1631 &send_core_data_multicast,
1635 info->peer->core_transmit[info->handler_n] = NULL;
1636 info->peer->infos[info->handler_n] = NULL;
1637 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1638 msg->header.size = htons (total_size);
1639 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1640 msg->tid = htonl (info->origin->tid);
1641 memcpy (&msg[1], info->data, info->size);
1642 if (0 == --(*info->copies))
1644 if (NULL != info->client)
1646 /* FIXME One unresponsive neighbor (who doesn't "call" tmt_rdy) can lock
1647 * the client from sending anything else to the service.
1648 * - Call receive_done after certain timeout.
1649 * - Here cancel the timeout.
1651 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1653 GNUNET_free (info->data);
1654 GNUNET_free (info->copies);
1662 * Function called to notify a client about the socket
1663 * being ready to queue more data. "buf" will be
1664 * NULL and "size" zero if the socket was closed for
1665 * writing in the meantime.
1667 * @param cls closure (MeshDataDescriptor)
1668 * @param size number of bytes available in buf
1669 * @param buf where the callee should write the message
1670 * @return number of bytes written to buf
1673 send_core_path_ack (void *cls, size_t size, void *buf)
1675 struct MeshDataDescriptor *info = cls;
1676 struct GNUNET_MESH_PathACK *msg = buf;
1678 GNUNET_assert (NULL != info);
1681 info->peer->core_transmit[info->handler_n] = NULL;
1683 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1688 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1689 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1690 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1691 msg->tid = htonl (info->origin->tid);
1692 msg->peer_id = my_full_id;
1694 /* TODO add signature */
1696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
1697 return sizeof (struct GNUNET_MESH_PathACK);
1702 * Function called to notify a client about the socket
1703 * being ready to queue more data. "buf" will be
1704 * NULL and "size" zero if the socket was closed for
1705 * writing in the meantime.
1707 * @param cls closure (data itself)
1708 * @param size number of bytes available in buf
1709 * @param buf where the callee should write the message
1710 * @return number of bytes written to buf
1713 send_core_data_raw (void *cls, size_t size, void *buf)
1715 struct GNUNET_MessageHeader *msg = cls;
1718 GNUNET_assert (NULL != msg);
1719 total_size = ntohs (msg->size);
1721 if (total_size > size)
1726 memcpy (buf, msg, total_size);
1734 * Send another peer a notification to destroy a tunnel
1735 * @param cls The tunnel to destroy
1736 * @param size Size in the buffer
1737 * @param buf Memory where to put the data to transmit
1738 * @return Size of data put in buffer
1741 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1743 struct MeshTunnel *t = cls;
1744 struct MeshClient *c;
1745 struct GNUNET_MESH_TunnelMessage *msg;
1749 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1750 /*FIXME*/ msg->header.size =
1751 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1752 msg->tunnel_id = htonl (t->id.tid);
1754 tunnel_destroy (c, t);
1755 return sizeof (struct GNUNET_MESH_TunnelMessage);
1760 /******************************************************************************/
1761 /******************** MESH NETWORK HANDLERS **************************/
1762 /******************************************************************************/
1766 * Core handler for path creation
1767 * struct GNUNET_CORE_MessageHandler
1769 * @param cls closure
1770 * @param message message
1771 * @param peer peer identity this notification is about
1772 * @param atsi performance data
1773 * @return GNUNET_OK to keep the connection open,
1774 * GNUNET_SYSERR to close it (signal serious error)
1778 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1779 const struct GNUNET_MessageHeader *message,
1780 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1782 unsigned int own_pos;
1785 MESH_TunnelNumber tid;
1786 struct GNUNET_MESH_ManipulatePath *msg;
1787 struct GNUNET_PeerIdentity *pi;
1788 struct GNUNET_PeerIdentity id;
1789 GNUNET_HashCode hash;
1790 struct MeshPeerPath *path;
1791 struct MeshPeerInfo *dest_peer_info;
1792 struct MeshPeerInfo *orig_peer_info;
1793 struct MeshTunnel *t;
1795 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1796 "MESH: Received a path create msg\n");
1797 size = ntohs (message->size);
1798 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1800 GNUNET_break_op (0);
1804 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1805 if (size % sizeof (struct GNUNET_PeerIdentity))
1807 GNUNET_break_op (0);
1810 size /= sizeof (struct GNUNET_PeerIdentity);
1813 GNUNET_break_op (0);
1816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1817 "MESH: path as %u hops.\n",
1819 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1821 tid = ntohl (msg->tid);
1822 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1823 t = tunnel_get (pi, tid);
1824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1825 "MESH: path is for tunnel %s [%X].\n",
1830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1831 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1832 t->id.oid = GNUNET_PEER_intern (pi);
1834 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1835 t->local_tid = next_local_tid++;
1836 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
1838 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1840 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1841 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1848 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1849 if (NULL == dest_peer_info)
1851 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1852 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1853 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1855 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1857 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1858 if (NULL == orig_peer_info)
1860 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1861 orig_peer_info->id = GNUNET_PEER_intern (pi);
1862 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1863 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1866 path = path_new (size);
1868 for (i = 0; i < size; i++)
1870 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1871 if (path->peers[i] == myid)
1875 { /* cannot be self, must be 'not found' */
1876 /* create path: self not found in path through self */
1877 GNUNET_break_op (0);
1878 path_destroy (path);
1879 /* FIXME error. destroy tunnel? leave for timeout? */
1882 if (own_pos == size - 1)
1884 /* It is for us! Send ack. */
1885 struct GNUNET_MESH_TunnelNotification cmsg;
1886 struct MeshDataDescriptor *info;
1889 path_add_to_origin (orig_peer_info, path); /* inverts path! */
1890 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1891 info->origin = &t->id;
1892 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1893 GNUNET_assert (NULL != info->peer);
1894 for (j = 0; info->peer->core_transmit[j]; j++)
1896 if (j == (CORE_QUEUE_SIZE - 1))
1902 info->handler_n = j;
1903 info->peer->core_transmit[j] =
1904 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1905 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1906 sizeof (struct GNUNET_MESH_PathACK),
1907 &send_core_path_ack, info);
1908 cmsg.header.size = htons(sizeof(cmsg));
1909 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1910 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
1911 cmsg.tunnel_id = htonl(t->local_tid);
1912 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
1916 /* It's for somebody else! Retransmit. */
1917 struct MeshPathInfo *path_info;
1919 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1921 path_info->path = path;
1922 path_info->peer = dest_peer_info;
1924 path_add_to_peer (dest_peer_info, path);
1925 GNUNET_PEER_resolve (path->peers[own_pos + 1], &id);
1926 GNUNET_CORE_notify_transmit_ready (
1930 GNUNET_TIME_UNIT_FOREVER_REL,
1932 sizeof (struct GNUNET_MESH_ManipulatePath) +
1933 path->length * sizeof(struct GNUNET_PeerIdentity),
1934 &send_core_create_path,
1942 * Core handler for mesh network traffic going from the origin to a peer
1944 * @param cls closure
1945 * @param peer peer identity this notification is about
1946 * @param message message
1947 * @param atsi performance data
1948 * @return GNUNET_OK to keep the connection open,
1949 * GNUNET_SYSERR to close it (signal serious error)
1952 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1953 const struct GNUNET_MessageHeader *message,
1954 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1956 struct GNUNET_MESH_Unicast *msg;
1957 struct MeshTunnel *t;
1958 struct MeshPeerInfo *pi;
1961 size = ntohs (message->size);
1963 sizeof (struct GNUNET_MESH_Unicast) +
1964 sizeof (struct GNUNET_MessageHeader))
1969 msg = (struct GNUNET_MESH_Unicast *) message;
1970 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1973 /* TODO notify back: we don't know this tunnel */
1974 GNUNET_break_op (0);
1977 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1978 &msg->destination.hashPubKey);
1981 /* TODO maybe feedback, log to statistics */
1982 GNUNET_break_op (0);
1987 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1990 msg = GNUNET_malloc (size);
1991 memcpy (msg, message, size);
1992 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1993 GNUNET_TIME_UNIT_FOREVER_REL,
1994 path_get_first_hop (t->tree, pi->id),
1996 &send_core_data_raw, msg);
2002 * Core handler for mesh network traffic going from the origin to all peers
2004 * @param cls closure
2005 * @param message message
2006 * @param peer peer identity this notification is about
2007 * @param atsi performance data
2008 * @return GNUNET_OK to keep the connection open,
2009 * GNUNET_SYSERR to close it (signal serious error)
2011 * TODO: Check who we got this from, to validate route.
2014 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2015 const struct GNUNET_MessageHeader *message,
2016 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2018 struct GNUNET_MESH_Multicast *msg;
2019 struct GNUNET_PeerIdentity *id;
2020 struct MeshDataDescriptor *info;
2021 struct MeshTunnelTreeNode *n;
2022 struct MeshTunnel *t;
2023 unsigned int *copies;
2028 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Multicast);
2029 if (size < sizeof (struct GNUNET_MessageHeader))
2031 GNUNET_break_op (0);
2034 msg = (struct GNUNET_MESH_Multicast *) message;
2035 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2039 /* TODO notify that we dont know that tunnel */
2040 GNUNET_break_op (0);
2044 /* Transmit to locally interested clients */
2045 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2047 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2049 n = t->tree->me->children_head;
2052 copies = GNUNET_malloc (sizeof (unsigned int));
2053 for (*copies = 0; NULL != n; n = n->next)
2055 n = t->tree->me->children_head;
2056 data = GNUNET_malloc (size);
2057 memcpy (data, &msg[1], size);
2060 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2061 info->origin = &t->id;
2064 info->copies = copies;
2065 info->client = t->client->handle;
2066 info->destination = n->peer;
2067 id = path_get_first_hop(t->tree, n->peer);
2068 info->peer = peer_info_get(id);
2069 GNUNET_assert (NULL != info->peer);
2070 for (i = 0; NULL != info->peer->core_transmit[i]; i++)
2072 if (i == (CORE_QUEUE_SIZE - 1))
2078 info->handler_n = i;
2079 info->peer->infos[i] = info;
2080 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2081 info->peer->core_transmit[i] =
2082 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2083 GNUNET_TIME_UNIT_FOREVER_REL, id,
2084 ntohs (msg->header.size),
2085 &send_core_data_multicast, info);
2093 * Core handler for mesh network traffic
2095 * @param cls closure
2096 * @param message message
2097 * @param peer peer identity this notification is about
2098 * @param atsi performance data
2100 * @return GNUNET_OK to keep the connection open,
2101 * GNUNET_SYSERR to close it (signal serious error)
2104 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2105 const struct GNUNET_MessageHeader *message,
2106 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2108 struct GNUNET_MESH_ToOrigin *msg;
2109 struct GNUNET_PeerIdentity id;
2110 struct MeshPeerInfo *peer_info;
2111 struct MeshTunnel *t;
2114 size = ntohs (message->size);
2115 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2116 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2118 GNUNET_break_op (0);
2121 msg = (struct GNUNET_MESH_ToOrigin *) message;
2122 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2126 /* TODO notify that we dont know this tunnel (whom)? */
2130 if (t->id.oid == myid)
2132 if (NULL == t->client)
2134 /* got data packet for ownerless tunnel */
2135 GNUNET_break_op (0);
2138 /* TODO signature verification */
2139 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
2143 peer_info = peer_info_get (&msg->oid);
2144 if (NULL == peer_info)
2146 /* unknown origin of tunnel */
2150 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2151 msg = GNUNET_malloc (size);
2152 memcpy (msg, message, size);
2153 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2154 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2155 &send_core_data_raw, msg);
2162 * Core handler for path ACKs
2164 * @param cls closure
2165 * @param message message
2166 * @param peer peer identity this notification is about
2167 * @param atsi performance data
2169 * @return GNUNET_OK to keep the connection open,
2170 * GNUNET_SYSERR to close it (signal serious error)
2173 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2174 const struct GNUNET_MessageHeader *message,
2175 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2177 struct GNUNET_MESH_PathACK *msg;
2178 struct MeshTunnelTreeNode *n;
2179 struct MeshPeerInfo *peer_info;
2180 struct MeshTunnel *t;
2182 msg = (struct GNUNET_MESH_PathACK *) message;
2183 t = tunnel_get (&msg->oid, msg->tid);
2186 /* TODO notify that we don't know the tunnel */
2190 /* Message for us? */
2191 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2193 if (NULL == t->client)
2195 GNUNET_break_op (0);
2198 peer_info = peer_info_get (&msg->peer_id);
2199 if (NULL == peer_info)
2201 GNUNET_break_op (0);
2204 n = tree_find_peer(t->tree->root, peer_info->id);
2207 GNUNET_break_op (0);
2210 n->status = MESH_PEER_READY;
2211 send_client_peer_connected(t, peer_info->id);
2215 peer_info = peer_info_get (&msg->oid);
2216 if (NULL == peer_info)
2218 /* If we know the tunnel, we should DEFINITELY know the peer */
2222 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2223 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2224 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2225 GNUNET_TIME_UNIT_FOREVER_REL,
2226 path_get_first_hop (t->tree,
2228 sizeof (struct GNUNET_MESH_PathACK),
2229 &send_core_data_raw, msg);
2235 * Functions to handle messages from core
2237 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2238 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2239 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2240 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2241 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2242 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2243 sizeof (struct GNUNET_MESH_PathACK)},
2249 /******************************************************************************/
2250 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2251 /******************************************************************************/
2254 * deregister_app: iterator for removing each application registered by a client
2256 * @param cls closure
2257 * @param key the hash of the application id (used to access the hashmap)
2258 * @param value the value stored at the key (client)
2260 * @return GNUNET_OK on success
2263 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2265 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2271 * notify_client_connection_failure: notify a client that the connection to the
2272 * requested remote peer is not possible (for instance, no route found)
2273 * Function called when the socket is ready to queue more data. "buf" will be
2274 * NULL and "size" zero if the socket was closed for writing in the meantime.
2276 * @param cls closure
2277 * @param size number of bytes available in buf
2278 * @param buf where the callee should write the message
2279 * @return number of bytes written to buf
2282 notify_client_connection_failure (void *cls, size_t size, void *buf)
2285 struct MeshPeerInfo *peer_info;
2286 struct GNUNET_MESH_PeerControl *msg;
2287 struct GNUNET_PeerIdentity id;
2289 if (0 == size && NULL == buf)
2291 // TODO retry? cancel?
2295 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2296 peer_info = (struct MeshPeerInfo *) cls;
2297 msg = (struct GNUNET_MESH_PeerControl *) buf;
2298 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2299 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2300 // msg->tunnel_id = htonl(peer_info->t->tid);
2301 GNUNET_PEER_resolve (peer_info->id, &id);
2302 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2310 * Send keepalive packets for a peer
2312 * @param cls Closure (tunnel for which to send the keepalive).
2313 * @param tc Notification context.
2315 * TODO: implement explicit multicast keepalive?
2318 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2320 struct MeshTunnel *t = cls;
2321 struct GNUNET_MessageHeader *payload;
2322 struct GNUNET_MESH_Multicast *msg;
2325 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2326 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2332 "MESH: sending keepalive for tunnel %d\n",
2335 size = sizeof(struct GNUNET_MESH_Multicast) +
2336 sizeof(struct GNUNET_MessageHeader);
2337 msg = GNUNET_malloc (size);
2338 msg->header.size = htons (size);
2339 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2340 msg->oid = my_full_id;
2341 msg->tid = htonl(t->id.tid);
2342 payload = (struct GNUNET_MessageHeader *) &msg[1];
2343 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2344 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2345 handle_mesh_data_multicast (NULL, &my_full_id, &msg->header, NULL);
2348 t->path_refresh_task =
2349 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
2355 * Function to process paths received for a new peer addition. The recorded
2356 * paths form the initial tunnel, which can be optimized later.
2357 * Called on each result obtained for the DHT search.
2359 * @param cls closure
2360 * @param exp when will this value expire
2361 * @param key key of the result
2362 * @param type type of the result
2363 * @param size number of bytes in data
2364 * @param data pointer to the result data
2366 * TODO: re-issue the request after certain time? cancel after X results?
2369 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2370 const GNUNET_HashCode * key,
2371 const struct GNUNET_PeerIdentity *get_path,
2372 unsigned int get_path_length,
2373 const struct GNUNET_PeerIdentity *put_path,
2374 unsigned int put_path_length,
2375 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2377 struct MeshPathInfo *path_info = cls;
2378 struct MeshPeerPath *p;
2379 struct GNUNET_PeerIdentity pi;
2382 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2383 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
2384 "MESH: Got results from DHT for %s\n",
2385 GNUNET_h2s_full(&pi.hashPubKey));
2386 GNUNET_DHT_get_stop(path_info->peer->dhtget);
2387 path_info->peer->dhtget = NULL;
2389 p = path_build_from_dht (get_path, get_path_length,
2390 put_path, put_path_length);
2391 path_add_to_peer (path_info->peer, p);
2392 for (i = 0; i < path_info->peer->ntunnels; i++)
2394 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2395 peer_info_connect(path_info->peer, path_info->t);
2397 GNUNET_free (path_info);
2404 * Function to process paths received for a new peer addition. The recorded
2405 * paths form the initial tunnel, which can be optimized later.
2406 * Called on each result obtained for the DHT search.
2408 * @param cls closure
2409 * @param exp when will this value expire
2410 * @param key key of the result
2411 * @param type type of the result
2412 * @param size number of bytes in data
2413 * @param data pointer to the result data
2416 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2417 const GNUNET_HashCode * key,
2418 const struct GNUNET_PeerIdentity *get_path,
2419 unsigned int get_path_length,
2420 const struct GNUNET_PeerIdentity *put_path,
2421 unsigned int put_path_length,
2422 enum GNUNET_BLOCK_Type type, size_t size,
2425 const struct GNUNET_PeerIdentity *pi = data;
2426 struct GNUNET_PeerIdentity id;
2427 struct MeshTunnel *t = cls;
2428 struct MeshPeerInfo *peer_info;
2429 struct MeshPathInfo *path_info;
2430 struct MeshPeerPath *p;
2433 if (size != sizeof (struct GNUNET_PeerIdentity))
2435 GNUNET_break_op (0);
2438 GNUNET_assert (NULL != t->client);
2439 GNUNET_DHT_get_stop (t->dht_get_type);
2440 t->dht_get_type = NULL;
2441 peer_info = peer_info_get (pi);
2442 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2443 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2445 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2446 NULL == peer_info->dhtget)
2448 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2449 path_info->peer = peer_info;
2451 /* we don't have a route to the peer, let's try a direct lookup */
2453 GNUNET_DHT_get_start (dht_handle, /* handle */
2454 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2455 GNUNET_BLOCK_TYPE_TEST, /* block type */
2456 &pi->hashPubKey, /* key to look up */
2457 10U, /* replication level */
2458 GNUNET_DHT_RO_RECORD_ROUTE |
2459 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2460 /* option to dht: record route */
2462 0, /* xquery bits */
2463 dht_get_id_handler, /* callback */
2464 path_info); /* closure */
2468 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
2469 path_add_to_peer (peer_info, p);
2470 tunnel_add_peer(t, peer_info);
2471 p = tree_get_path_to_peer(t->tree, peer_info->id);
2473 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2474 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2475 t->local_tid, p->length);
2476 for (i = 0; i < p->length; i++)
2478 GNUNET_PEER_resolve (p->peers[0], &id);
2479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2480 GNUNET_h2s_full (&id.hashPubKey));
2486 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2488 path_info->peer = peer_info;
2489 path_info->path = p;
2490 GNUNET_PEER_resolve (p->peers[1], &id);
2491 GNUNET_CORE_notify_transmit_ready (core_handle,
2497 GNUNET_TIME_UNIT_FOREVER_REL,
2501 sizeof (struct GNUNET_MESH_ManipulatePath)
2504 sizeof (struct GNUNET_PeerIdentity)),
2506 &send_core_create_path,
2508 path_info); /* cls */
2512 send_client_peer_connected(t, myid);
2516 /******************************************************************************/
2517 /********************* MESH LOCAL HANDLES **************************/
2518 /******************************************************************************/
2522 * Handler for client disconnection
2524 * @param cls closure
2525 * @param client identification of the client; NULL
2526 * for the last call when the server is destroyed
2529 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2531 struct MeshClient *c;
2532 struct MeshClient *next;
2534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2540 if (c->handle != client && NULL != client)
2542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2547 if (NULL != c->tunnels)
2549 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2550 &tunnel_destroy_iterator,
2552 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2555 /* deregister clients applications */
2556 if (NULL != c->apps)
2558 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2559 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2561 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2562 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2564 GNUNET_SCHEDULER_cancel (announce_applications_task);
2565 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2567 if (NULL != c->types)
2568 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2569 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2581 * Handler for new clients
2583 * @param cls closure
2584 * @param client identification of the client
2585 * @param message the actual message, which includes messages the client wants
2588 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2589 const struct GNUNET_MessageHeader *message)
2591 struct GNUNET_MESH_ClientConnect *cc_msg;
2592 struct MeshClient *c;
2593 GNUNET_MESH_ApplicationType *a;
2600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2601 /* Check data sanity */
2602 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2603 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2604 ntypes = ntohs (cc_msg->types);
2605 napps = ntohs (cc_msg->applications);
2607 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2610 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2614 /* Create new client structure */
2615 c = GNUNET_malloc (sizeof (struct MeshClient));
2617 c->id = next_client_id++;
2620 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2623 GNUNET_MESH_ApplicationType at;
2626 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2627 for (i = 0; i < napps; i++)
2630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2631 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2632 /* store in clients hashmap */
2633 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2634 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2635 /* store in global hashmap, for announcements */
2636 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2637 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2639 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2640 announce_applications_task =
2641 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2649 t = (uint16_t *) & a[napps];
2650 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2651 for (i = 0; i < ntypes; i++)
2654 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2656 /* store in clients hashmap */
2657 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2658 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2659 /* store in global hashmap */
2660 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2661 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2665 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2667 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2668 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2669 GNUNET_SERVER_notification_context_add (nc, client);
2671 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2679 * Handler for requests of new tunnels
2681 * @param cls closure
2682 * @param client identification of the client
2683 * @param message the actual message
2686 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2687 const struct GNUNET_MessageHeader *message)
2689 struct GNUNET_MESH_TunnelMessage *t_msg;
2690 struct MeshTunnel *t;
2691 struct MeshClient *c;
2692 GNUNET_HashCode hash;
2694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2696 /* Sanity check for client registration */
2697 if (NULL == (c = client_get (client)))
2700 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2707 /* Message sanity check */
2708 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2711 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2715 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2716 /* Sanity check for tunnel numbering */
2717 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2720 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2723 /* Sanity check for duplicate tunnel IDs */
2724 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2727 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2731 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2733 while (NULL != tunnel_get_by_pi (myid, next_tid))
2734 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2735 t->id.tid = next_tid++;
2737 t->local_tid = ntohl (t_msg->tunnel_id);
2739 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2741 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2743 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2744 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2747 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2751 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2753 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2754 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2757 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2760 t->tree = tree_new (t, myid);
2761 t->tree->refresh = REFRESH_PATH_TIME;
2762 t->tree->root->status = MESH_PEER_READY;
2763 t->tree->me = t->tree->root;
2765 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2771 * Handler for requests of deleting tunnels
2773 * @param cls closure
2774 * @param client identification of the client
2775 * @param message the actual message
2778 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2779 const struct GNUNET_MessageHeader *message)
2781 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2782 struct MeshClient *c;
2783 struct MeshTunnel *t;
2784 MESH_TunnelNumber tid;
2785 GNUNET_HashCode hash;
2787 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2789 /* Sanity check for client registration */
2790 if (NULL == (c = client_get (client)))
2793 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2796 /* Message sanity check */
2797 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2800 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2806 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2808 /* Retrieve tunnel */
2809 tid = ntohl (tunnel_msg->tunnel_id);
2811 /* Remove from local id hashmap */
2812 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2813 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2814 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2816 /* Remove from global id hashmap */
2817 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2818 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2820 // notify_tunnel_destroy(t); FIXME
2822 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2828 * Handler for connection requests to new peers
2830 * @param cls closure
2831 * @param client identification of the client
2832 * @param message the actual message (PeerControl)
2835 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2836 const struct GNUNET_MessageHeader *message)
2838 struct GNUNET_MESH_PeerControl *peer_msg;
2839 struct MeshPathInfo *path_info;
2840 struct MeshPeerInfo *peer_info;
2841 struct MeshClient *c;
2842 struct MeshTunnel *t;
2843 MESH_TunnelNumber tid;
2845 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
2846 /* Sanity check for client registration */
2847 if (NULL == (c = client_get (client)))
2850 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2854 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2855 /* Sanity check for message size */
2856 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2859 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2863 /* Tunnel exists? */
2864 tid = ntohl (peer_msg->tunnel_id);
2865 t = tunnel_get_by_local_id (c, tid);
2869 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2873 /* Does client own tunnel? */
2874 if (t->client->handle != client)
2877 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2880 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
2881 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
2882 peer_info = peer_info_get (&peer_msg->peer);
2884 /* Start DHT search if needed, otherwise just add peer to tunnel. */
2885 if (NULL == peer_info->dhtget && NULL == peer_info->path_head)
2887 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2888 path_info->peer = peer_info;
2891 GNUNET_DHT_get_start(dht_handle, /* handle */
2892 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2893 GNUNET_BLOCK_TYPE_TEST, /* type */
2894 &peer_msg->peer.hashPubKey, /*key to search */
2895 4, /* replication level */
2896 GNUNET_DHT_RO_RECORD_ROUTE |
2897 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2899 0, /* xquery bits */
2900 &dht_get_id_handler,
2901 (void *) path_info);
2903 else if (NULL != peer_info->path_head)
2906 for (i = 0; i < CORE_QUEUE_SIZE; i++)
2908 if (NULL == peer_info->core_transmit[i])
2911 if (CORE_QUEUE_SIZE == i)
2914 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2917 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2918 path_info->peer = peer_info;
2920 tunnel_add_peer(t, peer_info);
2921 path_info->path = tree_get_path_to_peer(t->tree, peer_info->id);
2922 peer_info = peer_info_get(path_get_first_hop(t->tree, path_info->peer->id));
2923 peer_info->infos[i] = path_info;
2924 peer_info->types[i] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
2925 peer_info->core_transmit[i] =
2926 GNUNET_CORE_notify_transmit_ready (
2930 GNUNET_TIME_UNIT_FOREVER_REL,
2931 path_get_first_hop(t->tree, path_info->peer->id),
2932 sizeof (struct GNUNET_MESH_ManipulatePath)
2933 + path_info->path->length * sizeof(struct GNUNET_PeerIdentity),
2934 &send_core_create_path,
2937 /* Otherwise: there is no path yet, but there is a DHT_get active already. */
2938 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2944 * Handler for disconnection requests of peers in a tunnel
2946 * @param cls closure
2947 * @param client identification of the client
2948 * @param message the actual message (PeerControl)
2951 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2952 const struct GNUNET_MessageHeader *message)
2954 struct GNUNET_MESH_PeerControl *peer_msg;
2955 struct MeshClient *c;
2956 struct MeshTunnel *t;
2957 MESH_TunnelNumber tid;
2959 /* Sanity check for client registration */
2960 if (NULL == (c = client_get (client)))
2963 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2966 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2967 /* Sanity check for message size */
2968 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2971 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2975 /* Tunnel exists? */
2976 tid = ntohl (peer_msg->tunnel_id);
2977 t = tunnel_get_by_local_id (c, tid);
2981 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2985 /* Does client own tunnel? */
2986 if (t->client->handle != client)
2989 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2993 /* Ok, delete peer from tunnel */
2994 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2995 &peer_msg->peer.hashPubKey);
2997 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3003 * Handler for connection requests to new peers by type
3005 * @param cls closure
3006 * @param client identification of the client
3007 * @param message the actual message (ConnectPeerByType)
3010 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3011 const struct GNUNET_MessageHeader *message)
3013 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3014 struct MeshClient *c;
3015 struct MeshTunnel *t;
3016 GNUNET_HashCode hash;
3017 MESH_TunnelNumber tid;
3019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3020 /* Sanity check for client registration */
3021 if (NULL == (c = client_get (client)))
3024 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3028 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3029 /* Sanity check for message size */
3030 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3031 ntohs (connect_msg->header.size))
3034 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3038 /* Tunnel exists? */
3039 tid = ntohl (connect_msg->tunnel_id);
3040 t = tunnel_get_by_local_id (c, tid);
3044 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3048 /* Does client own tunnel? */
3049 if (t->client->handle != client)
3052 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3056 /* Do WE have the service? */
3057 t->type = ntohl (connect_msg->type);
3058 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3059 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3060 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3063 /* Yes! Fast forward, add ourselves to the tunnel and send the
3064 * good news to the client
3066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3067 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3068 peer_info_get (&my_full_id),
3069 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3072 send_client_peer_connected(t, myid);
3073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3074 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3077 /* Ok, lets find a peer offering the service */
3078 if (NULL != t->dht_get_type)
3080 GNUNET_DHT_get_stop (t->dht_get_type);
3082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3083 GNUNET_h2s_full (&hash));
3085 GNUNET_DHT_get_start (dht_handle,
3086 GNUNET_TIME_UNIT_FOREVER_REL,
3087 GNUNET_BLOCK_TYPE_TEST,
3090 GNUNET_DHT_RO_RECORD_ROUTE |
3091 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3093 &dht_get_type_handler, t);
3095 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3101 * Handler for client traffic directed to one peer
3103 * @param cls closure
3104 * @param client identification of the client
3105 * @param message the actual message
3108 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3109 const struct GNUNET_MessageHeader *message)
3111 struct MeshClient *c;
3112 struct MeshTunnel *t;
3113 struct MeshPeerInfo *pi;
3114 struct GNUNET_MESH_Unicast *data_msg;
3115 MESH_TunnelNumber tid;
3118 /* Sanity check for client registration */
3119 if (NULL == (c = client_get (client)))
3122 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3125 data_msg = (struct GNUNET_MESH_Unicast *) message;
3126 /* Sanity check for message size */
3127 size = ntohs (message->size);
3128 if (sizeof (struct GNUNET_MESH_Unicast) +
3129 sizeof (struct GNUNET_MessageHeader) > size)
3132 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3136 /* Tunnel exists? */
3137 tid = ntohl (data_msg->tid);
3138 t = tunnel_get_by_local_id (c, tid);
3142 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3146 /* Is it a local tunnel? Then, does client own the tunnel? */
3147 if (t->client->handle != NULL && t->client->handle != client)
3150 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3154 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3155 &data_msg->destination.hashPubKey);
3156 /* Is the selected peer in the tunnel? */
3160 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3164 /* Ok, everything is correct, send the message
3165 * (pretend we got it from a mesh peer)
3168 char buf[ntohs (message->size)];
3169 struct GNUNET_MESH_Unicast *copy;
3171 /* Work around const limitation */
3172 copy = (struct GNUNET_MESH_Unicast *) buf;
3173 memcpy (buf, data_msg, size);
3174 copy->oid = my_full_id;
3175 copy->tid = htonl (t->id.tid);
3176 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL);
3178 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3183 * Handler for client traffic directed to all peers in a tunnel
3185 * @param cls closure
3186 * @param client identification of the client
3187 * @param message the actual message
3190 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3191 const struct GNUNET_MessageHeader *message)
3193 struct MeshClient *c;
3194 struct MeshTunnel *t;
3195 struct GNUNET_MESH_Multicast *data_msg;
3196 MESH_TunnelNumber tid;
3198 /* Sanity check for client registration */
3199 if (NULL == (c = client_get (client)))
3202 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3205 data_msg = (struct GNUNET_MESH_Multicast *) message;
3206 /* Sanity check for message size */
3207 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3210 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3214 /* Tunnel exists? */
3215 tid = ntohl (data_msg->tid);
3216 t = tunnel_get_by_local_id (c, tid);
3220 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3224 /* Does client own tunnel? */
3225 if (t->client->handle != client)
3228 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3233 char buf[ntohs(message->size)];
3234 struct GNUNET_MESH_Multicast *copy;
3236 copy = (struct GNUNET_MESH_Multicast *)buf;
3237 memcpy(buf, message, ntohs(message->size));
3238 copy->oid = my_full_id;
3239 copy->tid = htonl(t->id.tid);
3240 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL);
3243 /* receive done gets called when last copy is sent */
3248 * Functions to handle messages from clients
3250 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3251 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3252 {&handle_local_tunnel_create, NULL,
3253 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3254 sizeof (struct GNUNET_MESH_TunnelMessage)},
3255 {&handle_local_tunnel_destroy, NULL,
3256 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3257 sizeof (struct GNUNET_MESH_TunnelMessage)},
3258 {&handle_local_connect_add, NULL,
3259 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3260 sizeof (struct GNUNET_MESH_PeerControl)},
3261 {&handle_local_connect_del, NULL,
3262 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3263 sizeof (struct GNUNET_MESH_PeerControl)},
3264 {&handle_local_connect_by_type, NULL,
3265 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3266 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3267 {&handle_local_unicast, NULL,
3268 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3269 {&handle_local_unicast, NULL,
3270 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3271 {&handle_local_multicast, NULL,
3272 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3278 * To be called on core init/fail.
3280 * @param cls service closure
3281 * @param server handle to the server for this service
3282 * @param identity the public identity of this peer
3285 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3286 const struct GNUNET_PeerIdentity *identity)
3288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3289 core_handle = server;
3290 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3292 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3293 GNUNET_SCHEDULER_shutdown();
3299 * Method called whenever a given peer connects.
3301 * @param cls closure
3302 * @param peer peer identity this notification is about
3303 * @param atsi performance data for the connection
3306 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3307 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3309 struct MeshPeerInfo *peer_info;
3310 struct MeshPeerPath *path;
3312 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3313 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3314 // GNUNET_h2s(&my_full_id.hashPubKey));
3315 peer_info = peer_info_get (peer);
3316 if (myid == peer_info->id)
3318 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3323 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3324 // GNUNET_h2s(&peer->hashPubKey));
3326 path = path_new (2);
3327 path->peers[0] = myid;
3328 path->peers[1] = peer_info->id;
3329 GNUNET_PEER_change_rc(myid, 1);
3330 GNUNET_PEER_change_rc(peer_info->id, 1);
3331 path_add_to_peer (peer_info, path);
3336 * Method called whenever a peer disconnects.
3338 * @param cls closure
3339 * @param peer peer identity this notification is about
3342 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3344 struct MeshPeerInfo *pi;
3347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3348 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3354 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3356 peer_info_cancel_transmission(pi, i);
3358 path_remove_from_peer (pi, pi->id, myid);
3361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3367 /******************************************************************************/
3368 /************************ MAIN FUNCTIONS ****************************/
3369 /******************************************************************************/
3372 * Iterator over hash map entries.
3374 * @param cls closure
3375 * @param key current key code
3376 * @param value value in the hash map
3377 * @return GNUNET_YES if we should continue to
3382 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
3384 struct MeshTunnel *t = value;
3390 * Task run during shutdown.
3396 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3399 /* TODO: destroy tunnels? */
3400 if (core_handle != NULL)
3402 GNUNET_CORE_disconnect (core_handle);
3405 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
3406 if (dht_handle != NULL)
3408 GNUNET_DHT_disconnect (dht_handle);
3413 GNUNET_SERVER_notification_context_destroy (nc);
3416 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3418 GNUNET_SCHEDULER_cancel (announce_id_task);
3419 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3425 * Process mesh requests.
3427 * @param cls closure
3428 * @param server the initialized server
3429 * @param c configuration to use
3432 run (void *cls, struct GNUNET_SERVER_Handle *server,
3433 const struct GNUNET_CONFIGURATION_Handle *c)
3435 struct MeshPeerInfo *peer;
3436 struct MeshPeerPath *p;
3439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3440 server_handle = server;
3441 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3442 CORE_QUEUE_SIZE, /* queue size */
3443 NULL, /* Closure passed to MESH functions */
3444 &core_init, /* Call core_init once connected */
3445 &core_connect, /* Handle connects */
3446 &core_disconnect, /* remove peers on disconnects */
3447 NULL, /* Do we care about "status" updates? */
3448 NULL, /* Don't notify about all incoming messages */
3449 GNUNET_NO, /* For header only in notification */
3450 NULL, /* Don't notify about all outbound messages */
3451 GNUNET_NO, /* For header-only out notification */
3452 core_handlers); /* Register these handlers */
3453 if (core_handle == NULL)
3456 GNUNET_SCHEDULER_shutdown ();
3461 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3464 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3466 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3467 GNUNET_SCHEDULER_shutdown ();
3470 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3471 GNUNET_free (keyfile);
3472 if (my_private_key == NULL)
3474 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3475 _("Mesh service could not access hostkey. Exiting.\n"));
3476 GNUNET_SCHEDULER_shutdown ();
3479 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3480 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3481 &my_full_id.hashPubKey);
3482 myid = GNUNET_PEER_intern (&my_full_id);
3484 dht_handle = GNUNET_DHT_connect (c, 64);
3485 if (dht_handle == NULL)
3491 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3493 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3494 peers = GNUNET_CONTAINER_multihashmap_create (32);
3495 applications = GNUNET_CONTAINER_multihashmap_create (32);
3496 types = GNUNET_CONTAINER_multihashmap_create (32);
3498 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3499 nc = GNUNET_SERVER_notification_context_create (server_handle,
3501 GNUNET_SERVER_disconnect_notify (server_handle,
3502 &handle_local_client_disconnect,
3507 clients_tail = NULL;
3512 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3513 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3515 /* Create a peer_info for the local peer */
3516 peer = peer_info_get(&my_full_id);
3519 path_add_to_peer(peer, p);
3521 /* Scheduled the task to clean up when shutdown is called */
3522 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3529 * The main function for the mesh service.
3531 * @param argc number of arguments from the command line
3532 * @param argv command line arguments
3533 * @return 0 ok, 1 on error
3536 main (int argc, char *const *argv)
3541 // fprintf (stderr, "main ()\n");
3543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3546 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3550 // fprintf (stderr, "main () END\n");