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,\
66 /******************************************************************************/
67 /************************ DATA STRUCTURES ****************************/
68 /******************************************************************************/
70 /** FWD declaration */
74 * Struct containing all info possibly needed to build a package when called
77 struct MeshDataDescriptor
79 /** ID of the tunnel this packet travels in */
80 struct MESH_TunnelID *origin;
82 /** Ultimate destination of the packet */
83 GNUNET_PEER_Id destination;
85 /** Number of identical messages sent to different hops (multicast) */
88 /** Size of the data */
91 /** Client that asked for the transmission, if any */
92 struct GNUNET_SERVER_Client *client;
94 /** Who was is message being sent to */
95 struct MeshPeerInfo *peer;
97 /** Which handler was used to request the transmission */
98 unsigned int handler_n;
100 /* Data at the end */
105 * Struct containing all information regarding a given peer
115 * Last time we heard from this peer
117 struct GNUNET_TIME_Absolute last_contact;
120 * Number of attempts to reconnect so far
122 int n_reconnect_attempts;
125 * Paths to reach the peer, ordered by ascending hop count
127 struct MeshPeerPath *path_head;
130 * Paths to reach the peer, ordered by ascending hop count
132 struct MeshPeerPath *path_tail;
135 * Handle to stop the DHT search for a path to this peer
137 struct GNUNET_DHT_GetHandle *dhtget;
140 * Handles to stop queued transmissions for this peer
142 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
145 * Pointer to info stuctures used as cls for queued transmissions
147 struct MeshDataDescriptor *infos[CORE_QUEUE_SIZE];
150 * Array of tunnels this peer participates in
151 * (most probably a small amount, therefore not a hashmap)
152 * When the path to the peer changes, notify these tunnels to let them
153 * re-adjust their path trees.
155 struct MeshTunnel **tunnels;
158 * Number of tunnels above
160 unsigned int ntunnels;
165 * Data scheduled to transmit (to local client or remote peer)
172 struct MeshQueue *next;
173 struct MeshQueue *prev;
176 * Target of the data (NULL if target is client)
178 struct MeshPeerInfo *peer;
181 * Client to send the data to (NULL if target is peer)
183 struct MeshClient *client;
186 * Size of the message to transmit
191 * How old is the data?
193 struct GNUNET_TIME_Absolute timestamp;
198 struct GNUNET_MessageHeader *data;
202 * Globally unique tunnel identification (owner + number)
203 * DO NOT USE OVER THE NETWORK
208 * Node that owns the tunnel
213 * Tunnel number to differentiate all the tunnels owned by the node oid
214 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
216 MESH_TunnelNumber tid;
220 struct MeshClient; /* FWD declaration */
223 * Struct containing all information regarding a tunnel
224 * For an intermediate node the improtant info used will be:
225 * - id Tunnel unique identification
226 * - paths[0] To know where to send it next
227 * - metainfo: ready, speeds, accounting
234 struct MESH_TunnelID id;
237 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
239 MESH_TunnelNumber local_tid;
242 * Last time the tunnel was used
244 struct GNUNET_TIME_Absolute timestamp;
247 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
249 struct GNUNET_CONTAINER_MultiHashMap *peers;
252 * Number of peers that are connected and potentially ready to receive data
254 unsigned int peers_ready;
257 * Number of peers that have been added to the tunnel
259 unsigned int peers_total;
262 * Client owner of the tunnel, if any
264 struct MeshClient *client;
267 * Messages ready to transmit
269 struct MeshQueue *queue_head;
270 struct MeshQueue *queue_tail;
275 struct MeshTunnelTree *tree;
278 * Task to keep the used paths alive
280 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
285 * Info needed to work with tunnel paths and peers
292 struct MeshTunnel *t;
297 struct MeshPeerInfo *peer;
302 struct MeshPeerPath *path;
307 * Struct containing information about a client of the service
314 struct MeshClient *next;
315 struct MeshClient *prev;
318 * Tunnels that belong to this client, indexed by local id
320 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
323 * Handle to communicate with the client
325 struct GNUNET_SERVER_Client *handle;
328 * Applications that this client has claimed to provide
330 struct GNUNET_CONTAINER_MultiHashMap *apps;
333 * Messages that this client has declared interest in
335 struct GNUNET_CONTAINER_MultiHashMap *types;
338 * Used to search peers offering a service
340 struct GNUNET_DHT_GetHandle *dht_get_type;
344 * ID of the client, for debug messages
353 /******************************************************************************/
354 /************************ DEBUG FUNCTIONS ****************************/
355 /******************************************************************************/
359 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
360 * @param cls string to print
361 * @param tc task context
364 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
368 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
377 /******************************************************************************/
378 /*********************** GLOBAL VARIABLES ****************************/
379 /******************************************************************************/
384 static struct MeshClient *clients;
385 static struct MeshClient *clients_tail;
388 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
390 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
393 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
395 static struct GNUNET_CONTAINER_MultiHashMap *peers;
398 * Handle to communicate with core
400 static struct GNUNET_CORE_Handle *core_handle;
405 static struct GNUNET_DHT_Handle *dht_handle;
410 static struct GNUNET_SERVER_Handle *server_handle;
413 * Notification context, to send messages to local clients
415 static struct GNUNET_SERVER_NotificationContext *nc;
418 * Local peer own ID (memory efficient handle)
420 static GNUNET_PEER_Id myid;
423 * Local peer own ID (full value)
425 static struct GNUNET_PeerIdentity my_full_id;
430 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
435 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
438 * Tunnel ID for the next created tunnel (global tunnel number)
440 static MESH_TunnelNumber next_tid;
443 * All application types provided by this peer
445 static struct GNUNET_CONTAINER_MultiHashMap *applications;
448 * All message types clients of this peer are interested in
450 static struct GNUNET_CONTAINER_MultiHashMap *types;
453 * Task to periodically announce provided applications
455 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
458 * Task to periodically announce itself in the network
460 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
463 unsigned int next_client_id;
467 /******************************************************************************/
468 /************************ ITERATORS ****************************/
469 /******************************************************************************/
473 * Iterator over hash map peer entries collect all neighbors who to resend the
476 * @param cls closure (**GNUNET_PEER_Id to store hops to send packet)
477 * @param key current key code (peer id hash)
478 * @param value value in the hash map (peer_info)
479 * @return GNUNET_YES if we should continue to iterate, GNUNET_NO if not.
482 iterate_collect_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
484 struct MeshPeerInfo *peer_info = value;
485 struct MeshPathInfo *neighbors = cls;
486 struct GNUNET_PeerIdentity *id;
487 GNUNET_PEER_Id peer_id;
490 if (peer_info->id == myid)
494 id = path_get_first_hop (neighbors->t->tree, peer_info->id);
495 peer_id = GNUNET_PEER_search(id);
496 for (i = 0; i < neighbors->path->length; i++)
498 if (neighbors->path->peers[i] == peer_id)
501 GNUNET_array_append (neighbors->path->peers, neighbors->path->length,
508 /******************************************************************************/
509 /************************ PERIODIC FUNCTIONS ****************************/
510 /******************************************************************************/
513 * Announce iterator over for each application provided by the peer
516 * @param key current key code
517 * @param value value in the hash map
518 * @return GNUNET_YES if we should continue to
523 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
525 /* FIXME are hashes in multihash map equal on all aquitectures? */
526 GNUNET_DHT_put (dht_handle, key, 10U, GNUNET_DHT_RO_RECORD_ROUTE,
527 GNUNET_BLOCK_TYPE_TEST, sizeof (struct GNUNET_PeerIdentity),
528 (const char *) &my_full_id,
530 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
531 &mesh_debug, "DHT_put for app completed");
533 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
535 APP_ANNOUNCE_TIME, NULL, NULL);
542 * Periodically announce what applications are provided by local clients
545 * @param tc task context
548 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
550 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
552 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
556 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
558 announce_applications_task =
559 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
567 * Periodically announce self id in the DHT
570 * @param tc task context
573 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
575 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
577 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
581 * - Set data expiration in function of X
584 GNUNET_DHT_put (dht_handle, /* DHT handle */
585 &my_full_id.hashPubKey, /* Key to use */
586 10U, /* Replication level */
587 GNUNET_DHT_RO_RECORD_ROUTE, /* DHT options */
588 GNUNET_BLOCK_TYPE_TEST, /* Block type */
589 0, /* Size of the data */
590 NULL, /* Data itself */
591 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
592 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
594 &mesh_debug, "DHT_put for id completed");
596 NULL, /* Continuation */
597 NULL); /* Continuation closure */
600 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
605 * Function to process paths received for a new peer addition. The recorded
606 * paths form the initial tunnel, which can be optimized later.
607 * Called on each result obtained for the DHT search.
610 * @param exp when will this value expire
611 * @param key key of the result
612 * @param get_path NULL-terminated array of pointers
613 * to the peers on reverse GET path (or NULL if not recorded)
614 * @param put_path NULL-terminated array of pointers
615 * to the peers on the PUT path (or NULL if not recorded)
616 * @param type type of the result
617 * @param size number of bytes in data
618 * @param data pointer to the result data
623 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
624 const GNUNET_HashCode * key,
625 const struct GNUNET_PeerIdentity *const *get_path,
626 const struct GNUNET_PeerIdentity *const *put_path,
627 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
630 /******************************************************************************/
631 /****************** GENERAL HELPER FUNCTIONS ************************/
632 /******************************************************************************/
635 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
636 * and insert it in the appropiate structures if the peer is not known yet.
638 * @param peer Identity of the peer
640 * @return Existing or newly created peer info
642 static struct MeshPeerInfo *
643 peer_info_get (const struct GNUNET_PeerIdentity *peer)
645 struct MeshPeerInfo *peer_info;
647 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
648 if (NULL == peer_info)
651 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
652 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
653 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
654 peer_info->id = GNUNET_PEER_intern (peer);
663 * Destroy the peer_info and free any allocated resources linked to it
664 * @param t tunnel the path belongs to
665 * @param pi the peer_info to destroy
666 * @return GNUNET_OK on success
669 peer_info_destroy (struct MeshPeerInfo *pi)
671 GNUNET_HashCode hash;
672 struct GNUNET_PeerIdentity id;
674 GNUNET_PEER_resolve (pi->id, &id);
675 GNUNET_PEER_change_rc (pi->id, -1);
676 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
678 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
679 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
687 * Notify a tunnel that a connection has broken that affects at least
690 * @param t Tunnel affected.
691 * @param peer Peer that (at least) has been affected by the disconnection.
692 * @param p1 Peer that got disconnected from p2.
693 * @param p2 Peer that got disconnected from p1.
695 * @return Short ID of the peer disconnected (either p1 or p2).
696 * 0 if the tunnel remained unaffected.
698 static GNUNET_PEER_Id
699 tunnel_notify_connection_broken (struct MeshTunnel *t,
700 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
704 * Remove all paths that rely on a direct connection between p1 and p2
705 * from the peer itself and notify all tunnels about it.
707 * @param peer PeerInfo of affected peer.
708 * @param p1 GNUNET_PEER_Id of one peer.
709 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
712 * TODO: optimize (see below)
715 path_remove_from_peer (struct MeshPeerInfo *peer,
719 struct GNUNET_PeerIdentity id;
720 struct MeshPeerPath *p;
721 struct MeshPeerPath *aux;
722 struct MeshPeerInfo *peer_d;
724 unsigned int destroyed;
734 for (i = 0; i < (p->length - 1); i++)
736 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
737 (p->peers[i] == p2 && p->peers[i + 1] == p1))
749 for (i = 0; i < peer->ntunnels; i++)
751 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
753 * Problem: one or more peers have been deleted from the tunnel tree.
754 * We don't know who they are to try to add them again.
755 * We need to try to find a new path for each of the disconnected peers.
756 * Some of them might already have a path to reach them that does not
757 * involve p1 and p2. Adding all anew might render in a better tree than
758 * the trivial immediate fix.
760 * Trivial immiediate fix: try to reconnect to the disconnected node. All
761 * its children will be reachable trough him.
763 GNUNET_PEER_resolve(d, &id);
764 peer_d = peer_info_get(&id);
767 for (p = peer_d->path_head; NULL != p; p = p->next)
769 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
777 /* No callback, as peer will be already disconnected */
778 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
782 struct MeshPathInfo *path_info;
784 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
786 path_info->peer = peer_d;
787 path_info->t = peer->tunnels[i];
788 peer_d->dhtget = GNUNET_DHT_get_start(dht_handle, /* handle */
789 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
790 GNUNET_BLOCK_TYPE_TEST, /* type */
791 &id.hashPubKey, /*key to search */
792 4, /* replication level */
793 GNUNET_DHT_RO_RECORD_ROUTE,
794 NULL, /* bloom filter */
806 * Add the path to the peer and update the path used to reach it in case this
809 * @param peer_info Destination peer to add the path to.
810 * @param path New path to add. Last peer must be the peer in arg 1.
811 * Path will be either used of freed if already known.
813 * TODO: trim the part from origin to us? Add it as path to origin?
816 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
818 struct MeshPeerPath *aux;
822 if (NULL == peer_info || NULL == path)
828 l = path_get_length (path);
830 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
832 l2 = path_get_length (aux);
835 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
836 peer_info->path_tail, aux, path);
840 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
847 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
854 * Add the path to the origin peer and update the path used to reach it in case
855 * this is the shortest.
856 * The path is given in peer_info -> destination, therefore we turn the path
859 * @param peer_info Peer to add the path to, being the origin of the path.
860 * @param path New path to add after being inversed.
863 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
866 path_add_to_peer (peer_info, path);
871 * Build a PeerPath from the paths returned from the DHT, reversing the paths
872 * to obtain a local peer -> destination path and interning the peer ids.
874 * @param get_path NULL-terminated array of pointers
875 * to the peers on reverse GET path (or NULL if not recorded)
876 * @param put_path NULL-terminated array of pointers
877 * to the peers on the PUT path (or NULL if not recorded)
879 * @return Newly allocated and created path
881 static struct MeshPeerPath *
882 path_build_from_dht (const struct GNUNET_PeerIdentity *const *get_path,
883 const struct GNUNET_PeerIdentity *const *put_path)
885 struct MeshPeerPath *p;
890 for (i = 0; get_path[i] != NULL; i++) ;
891 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
892 for (i--; i >= 0; i--)
894 id = GNUNET_PEER_intern (get_path[i]);
895 if (p->length > 0 && id == p->peers[p->length - 1])
897 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
898 GNUNET_PEER_change_rc(id, -1);
903 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
904 p->peers[p->length] = id;
908 for (i = 0; put_path[i] != NULL; i++) ;
909 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
910 for (i--; i >= 0; i--)
912 id = GNUNET_PEER_intern (put_path[i]);
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);
921 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
922 p->peers[p->length] = id;
927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
928 "MESH: (first of GET: %s)\n",
929 GNUNET_h2s_full(&get_path[0]->hashPubKey));
930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
931 "MESH: (first of PUT: %s)\n",
932 GNUNET_h2s_full(&put_path[0]->hashPubKey));
933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
934 "MESH: In total: %d hops\n",
942 * Send keepalive packets for a peer
950 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
952 struct MeshTunnel *t = cls;
954 // struct GNUNET_PeerIdentity id;
956 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
960 /* FIXME implement multicast keepalive. Just an empty multicast packet? */
961 // GNUNET_PEER_resolve (path_get_first_hop (path->t, path->peer)->id, &id);
962 // GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
963 // GNUNET_TIME_UNIT_FOREVER_REL, &id,
964 // sizeof (struct GNUNET_MESH_ManipulatePath)
966 // (path->path->length *
967 // sizeof (struct GNUNET_PeerIdentity)),
968 // &send_core_create_path,
970 t->path_refresh_task =
971 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
977 * Check if client has registered with the service and has not disconnected
979 * @param client the client to check
981 * @return non-NULL if client exists in the global DLL
983 static struct MeshClient *
984 client_get (struct GNUNET_SERVER_Client *client)
986 struct MeshClient *c;
991 if (c->handle == client)
1000 * Checks if a given client has subscribed to certain message type
1002 * @param message_type Type of message to check
1003 * @param c Client to check
1005 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1010 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1014 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1015 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1020 * Search for a tunnel among the tunnels for a client
1022 * @param c the client whose tunnels to search in
1023 * @param tid the local id of the tunnel
1025 * @return tunnel handler, NULL if doesn't exist
1027 static struct MeshTunnel *
1028 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1030 GNUNET_HashCode hash;
1032 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1033 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1038 * Search for a tunnel by global ID using PEER_ID
1040 * @param pi owner of the tunnel
1041 * @param tid global tunnel number
1043 * @return tunnel handler, NULL if doesn't exist
1045 static struct MeshTunnel *
1046 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1048 struct MESH_TunnelID id;
1049 GNUNET_HashCode hash;
1054 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1055 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1060 * Search for a tunnel by global ID using full PeerIdentities
1062 * @param oid owner of the tunnel
1063 * @param tid global tunnel number
1065 * @return tunnel handler, NULL if doesn't exist
1067 static struct MeshTunnel *
1068 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1070 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1075 * Callback used to notify a client owner of a tunnel that a peer has
1076 * disconnected, most likely because of a path change.
1078 * @param n Node in the tree representing the disconnected peer
1081 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1083 struct GNUNET_MESH_PeerControl msg;
1085 if (NULL == n->t->client || NULL == nc)
1088 msg.header.size = htons (sizeof (msg));
1089 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1090 msg.tunnel_id = htonl (n->t->local_tid);
1091 GNUNET_PEER_resolve (n->peer, &msg.peer);
1092 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1093 &msg.header, GNUNET_NO);
1098 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1099 * needed rescources.
1101 * @param t Tunnel we want to add a new peer to
1102 * @param peer PeerInfo of the peer being added
1106 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1108 struct MeshPeerPath *p;
1109 struct MeshPeerPath *best_p;
1110 unsigned int best_cost;
1113 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1114 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 * FIXME working on it
1149 static GNUNET_PEER_Id
1150 tunnel_notify_connection_broken (struct MeshTunnel *t,
1151 struct MeshPeerInfo *peer,
1155 return tree_notify_connection_broken (t->tree, p1, p2,
1156 ¬ify_peer_disconnected);
1161 * Destroy the tunnel and free any allocated resources linked to it
1163 * @param t the tunnel to destroy
1165 * @return GNUNET_OK on success
1168 tunnel_destroy (struct MeshTunnel *t)
1170 struct MeshClient *c;
1171 struct MeshQueue *q;
1172 struct MeshQueue *qn;
1173 GNUNET_HashCode hash;
1176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1182 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1185 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1186 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1191 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1192 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1196 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1200 if (NULL != q->data)
1201 GNUNET_free (q->data);
1205 /* TODO cancel core transmit ready in case it was active */
1207 tree_destroy(t->tree);
1214 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1215 * client when the client disconnects.
1217 * @param cls closure (client that is disconnecting)
1218 * @param key the hash of the local tunnel id (used to access the hashmap)
1219 * @param value the value stored at the key (tunnel to destroy)
1221 * @return GNUNET_OK on success
1224 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1228 r = tunnel_destroy ((struct MeshTunnel *) value);
1233 /******************************************************************************/
1234 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1235 /******************************************************************************/
1239 * Function called to notify a client about the socket
1240 * being ready to queue more data. "buf" will be
1241 * NULL and "size" zero if the socket was closed for
1242 * writing in the meantime.
1244 * @param cls closure
1245 * @param size number of bytes available in buf
1246 * @param buf where the callee should write the message
1247 * @return number of bytes written to buf
1250 send_core_create_path (void *cls, size_t size, void *buf)
1252 struct MeshPathInfo *info = cls;
1253 struct GNUNET_MESH_ManipulatePath *msg;
1254 struct GNUNET_PeerIdentity *peer_ptr;
1255 struct MeshPeerInfo *peer = info->peer;
1256 struct MeshTunnel *t = info->t;
1257 struct MeshPeerPath *p = info->path;
1262 sizeof (struct GNUNET_MESH_ManipulatePath) +
1263 p->length * sizeof (struct GNUNET_PeerIdentity);
1265 if (size < size_needed || NULL == buf)
1267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting create path\n");
1268 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1269 GNUNET_TIME_UNIT_FOREVER_REL,
1270 path_get_first_hop (t->tree, peer->id),
1271 size_needed, &send_core_create_path,
1276 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1277 msg->header.size = htons (size_needed);
1278 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1279 msg->tid = ntohl (t->id.tid);
1281 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1282 for (i = 0; i < p->length; i++)
1284 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1296 * Function called to notify a client about the socket
1297 * being ready to queue more data. "buf" will be
1298 * NULL and "size" zero if the socket was closed for
1299 * writing in the meantime.
1301 * @param cls closure (MeshDataDescriptor with all info to build packet)
1302 * @param size number of bytes available in buf
1303 * @param buf where the callee should write the message
1304 * @return number of bytes written to buf
1307 send_core_data_to_origin (void *cls, size_t size, void *buf)
1309 struct MeshDataDescriptor *info = cls;
1310 struct GNUNET_MESH_ToOrigin *msg = buf;
1313 GNUNET_assert (NULL != info);
1314 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1315 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1317 if (total_size > size)
1319 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1320 "not enough buffer to send data to origin\n");
1323 msg->header.size = htons (total_size);
1324 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1325 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1326 msg->tid = htonl (info->origin->tid);
1327 if (0 != info->size)
1329 memcpy (&msg[1], &info[1], info->size);
1331 if (NULL != info->client)
1333 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1341 * Function called to notify a client about the socket
1342 * being ready to queue more data. "buf" will be
1343 * NULL and "size" zero if the socket was closed for
1344 * writing in the meantime.
1346 * @param cls closure (data itself)
1347 * @param size number of bytes available in buf
1348 * @param buf where the callee should write the message
1349 * @return number of bytes written to buf
1352 send_core_data_unicast (void *cls, size_t size, void *buf)
1354 struct MeshDataDescriptor *info = cls;
1355 struct GNUNET_MESH_Unicast *msg = buf;
1358 GNUNET_assert (NULL != info);
1359 total_size = sizeof (struct GNUNET_MESH_Unicast) + info->size;
1360 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1362 if (total_size > size)
1364 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1365 "not enough buffer to send data to peer\n");
1368 msg->header.size = htons (total_size);
1369 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
1370 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1371 GNUNET_PEER_resolve (info->destination, &msg->destination);
1372 msg->tid = htonl (info->origin->tid);
1373 if (0 != info->size)
1375 memcpy (&msg[1], &info[1], info->size);
1377 if (NULL != info->client)
1379 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1387 * Function called to notify a client about the socket
1388 * being ready to queue more data. "buf" will be
1389 * NULL and "size" zero if the socket was closed for
1390 * writing in the meantime.
1392 * @param cls closure (data itself)
1393 * @param size number of bytes available in buf
1394 * @param buf where the callee should write the message
1395 * @return number of bytes written to buf
1398 send_core_data_multicast (void *cls, size_t size, void *buf)
1400 struct MeshDataDescriptor *info = cls;
1401 struct GNUNET_MESH_Multicast *msg = buf;
1404 GNUNET_assert (NULL != info);
1405 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1406 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1410 info->peer->core_transmit[info->handler_n] = NULL;
1412 if (total_size > size)
1414 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1415 "not enough buffer to send data futher\n");
1418 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1419 msg->header.size = htons (total_size);
1420 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1421 msg->tid = htonl (info->origin->tid);
1422 memcpy (&msg[1], &info[1], total_size);
1423 if (0 == --info->copies)
1425 if (NULL != info->client)
1427 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1436 * Function called to notify a client about the socket
1437 * being ready to queue more data. "buf" will be
1438 * NULL and "size" zero if the socket was closed for
1439 * writing in the meantime.
1441 * @param cls closure (MeshDataDescriptor)
1442 * @param size number of bytes available in buf
1443 * @param buf where the callee should write the message
1444 * @return number of bytes written to buf
1447 send_core_path_ack (void *cls, size_t size, void *buf)
1449 struct MeshDataDescriptor *info = cls;
1450 struct GNUNET_MESH_PathACK *msg = buf;
1452 GNUNET_assert (NULL != info);
1455 info->peer->core_transmit[info->handler_n] = NULL;
1457 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1462 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1463 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1464 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1465 msg->tid = htonl (info->origin->tid);
1466 msg->peer_id = my_full_id;
1468 /* TODO add signature */
1470 return sizeof (struct GNUNET_MESH_PathACK);
1475 * Function called to notify a client about the socket
1476 * being ready to queue more data. "buf" will be
1477 * NULL and "size" zero if the socket was closed for
1478 * writing in the meantime.
1480 * @param cls closure (data itself)
1481 * @param size number of bytes available in buf
1482 * @param buf where the callee should write the message
1483 * @return number of bytes written to buf
1486 send_core_data_raw (void *cls, size_t size, void *buf)
1488 struct GNUNET_MessageHeader *msg = cls;
1491 GNUNET_assert (NULL != msg);
1492 total_size = ntohs (msg->size);
1494 if (total_size > size)
1499 memcpy (buf, msg, total_size);
1507 * Send another peer a notification to destroy a tunnel
1508 * @param cls The tunnel to destroy
1509 * @param size Size in the buffer
1510 * @param buf Memory where to put the data to transmit
1511 * @return Size of data put in buffer
1514 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1516 struct MeshTunnel *t = cls;
1517 struct MeshClient *c;
1518 struct GNUNET_MESH_TunnelMessage *msg;
1522 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1523 /*FIXME*/ msg->header.size =
1524 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1525 msg->tunnel_id = htonl (t->id.tid);
1527 tunnel_destroy (c, t);
1528 return sizeof (struct GNUNET_MESH_TunnelMessage);
1534 * Send the message to all clients that have subscribed to its type
1536 * @param msg Pointer to the message itself
1537 * @return number of clients this message was sent to
1540 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1542 struct MeshClient *c;
1546 type = ntohs (msg->type);
1547 for (count = 0, c = clients; c != NULL; c = c->next)
1549 if (client_is_subscribed (type, c))
1552 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1562 * Notify the client that owns the tunnel that a peer has connected to it
1564 * @param t Tunnel whose owner to notify
1565 * @param id Short id of the peer that has connected
1568 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
1570 struct GNUNET_MESH_PeerControl pc;
1572 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1573 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1574 pc.tunnel_id = htonl (t->local_tid);
1575 GNUNET_PEER_resolve (id, &pc.peer);
1576 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1577 &pc.header, GNUNET_NO);
1581 /******************************************************************************/
1582 /******************** MESH NETWORK HANDLERS **************************/
1583 /******************************************************************************/
1587 * Core handler for path creation
1588 * struct GNUNET_CORE_MessageHandler
1590 * @param cls closure
1591 * @param message message
1592 * @param peer peer identity this notification is about
1593 * @param atsi performance data
1594 * @return GNUNET_OK to keep the connection open,
1595 * GNUNET_SYSERR to close it (signal serious error)
1599 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1600 const struct GNUNET_MessageHeader *message,
1601 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1603 unsigned int own_pos;
1606 MESH_TunnelNumber tid;
1607 struct GNUNET_MESH_ManipulatePath *msg;
1608 struct GNUNET_PeerIdentity *pi;
1609 struct GNUNET_PeerIdentity id;
1610 GNUNET_HashCode hash;
1611 struct MeshPeerPath *path;
1612 struct MeshPeerInfo *dest_peer_info;
1613 struct MeshPeerInfo *orig_peer_info;
1614 struct MeshTunnel *t;
1616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1617 "MESH: Received a MESH path create msg\n");
1618 size = ntohs (message->size);
1619 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1621 GNUNET_break_op (0);
1625 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1626 if (size % sizeof (struct GNUNET_PeerIdentity))
1628 GNUNET_break_op (0);
1631 size /= sizeof (struct GNUNET_PeerIdentity);
1634 GNUNET_break_op (0);
1637 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1639 tid = ntohl (msg->tid);
1640 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1641 t = tunnel_get (pi, tid);
1645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1646 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1647 t->id.oid = GNUNET_PEER_intern (pi);
1649 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1651 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1653 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1654 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1662 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1663 if (NULL == dest_peer_info)
1665 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1666 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1667 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1669 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1671 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1672 if (NULL == orig_peer_info)
1674 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1675 orig_peer_info->id = GNUNET_PEER_intern (pi);
1676 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1677 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1680 path = path_new (size);
1682 for (i = 0; i < size; i++)
1684 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1685 if (path->peers[i] == myid)
1689 { /* cannot be self, must be 'not found' */
1690 /* create path: self not found in path through self */
1691 GNUNET_break_op (0);
1692 path_destroy (path);
1693 /* FIXME error. destroy tunnel? leave for timeout? */
1696 if (own_pos == size - 1)
1698 /* It is for us! Send ack. */
1699 struct MeshDataDescriptor *info;
1702 path_add_to_origin (orig_peer_info, path); /* inverts path! */
1703 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1704 info->origin = &t->id;
1705 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1706 GNUNET_assert (info->peer);
1707 for (j = 0; info->peer->core_transmit[j]; j++)
1715 info->handler_n = j;
1716 info->peer->core_transmit[j] =
1717 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1718 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1719 sizeof (struct GNUNET_MessageHeader),
1720 &send_core_path_ack, info);
1724 /* It's for somebody else! Retransmit. */
1725 struct MeshPathInfo *path_info;
1727 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1729 path_info->path = path;
1730 path_info->peer = dest_peer_info;
1732 path_add_to_peer (dest_peer_info, path);
1733 GNUNET_PEER_resolve (path->peers[own_pos + 1], &id);
1734 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1735 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1736 sizeof (struct GNUNET_MessageHeader),
1737 &send_core_create_path, path_info);
1744 * Core handler for mesh network traffic going from the origin to a peer
1746 * @param cls closure
1747 * @param peer peer identity this notification is about
1748 * @param message message
1749 * @param atsi performance data
1750 * @return GNUNET_OK to keep the connection open,
1751 * GNUNET_SYSERR to close it (signal serious error)
1754 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1755 const struct GNUNET_MessageHeader *message,
1756 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1758 struct GNUNET_MESH_Unicast *msg;
1759 struct MeshTunnel *t;
1760 struct MeshPeerInfo *pi;
1763 size = ntohs (message->size);
1765 sizeof (struct GNUNET_MESH_Unicast) +
1766 sizeof (struct GNUNET_MessageHeader))
1771 msg = (struct GNUNET_MESH_Unicast *) message;
1772 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1775 /* TODO notify back: we don't know this tunnel */
1778 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1779 &msg->destination.hashPubKey);
1782 /* TODO maybe feedback, log to statistics */
1787 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1790 msg = GNUNET_malloc (size);
1791 memcpy (msg, message, size);
1792 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1793 GNUNET_TIME_UNIT_FOREVER_REL,
1794 path_get_first_hop (t->tree, pi->id),
1796 &send_core_data_raw, msg);
1802 * Core handler for mesh network traffic going from the origin to all peers
1804 * @param cls closure
1805 * @param message message
1806 * @param peer peer identity this notification is about
1807 * @param atsi performance data
1808 * @return GNUNET_OK to keep the connection open,
1809 * GNUNET_SYSERR to close it (signal serious error)
1812 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1813 const struct GNUNET_MessageHeader *message,
1814 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1816 struct GNUNET_MESH_Multicast *msg;
1817 struct GNUNET_PeerIdentity id;
1818 struct MeshDataDescriptor *info;
1819 struct MeshPathInfo neighbors;
1820 struct MeshTunnel *t;
1826 size = ntohs (message->size);
1828 sizeof (struct GNUNET_MESH_Multicast) +
1829 sizeof (struct GNUNET_MessageHeader))
1831 GNUNET_break_op (0);
1834 msg = (struct GNUNET_MESH_Multicast *) message;
1835 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1839 /* TODO notify that we dont know that tunnel */
1843 /* Transmit to locally interested clients */
1844 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
1846 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1849 /* Retransmit to other peers.
1850 * Using path here as just a collection of peers, not a path per se.
1853 neighbors.path = path_new (0);
1854 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &iterate_collect_neighbors,
1856 if (0 == neighbors.path->length)
1858 GNUNET_free (neighbors.path);
1861 size -= sizeof (struct GNUNET_MESH_Multicast);
1862 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + size);
1863 info->origin = &t->id;
1864 info->copies = neighbors.path->length;
1865 for (i = 0; i < info->copies; i++)
1867 GNUNET_PEER_resolve (neighbors.path->peers[i], &id);
1868 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1869 GNUNET_assert (NULL != info->peer);
1870 for (j = 0; 0 != info->peer->core_transmit[j]; j++)
1872 if (j == (CORE_QUEUE_SIZE - 1))
1878 info->handler_n = j;
1879 info->peer->infos[j] = info;
1880 info->peer->core_transmit[j] =
1881 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1882 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1883 ntohs (msg->header.size),
1884 &send_core_data_multicast, info);
1886 GNUNET_free (neighbors.path->peers);
1887 GNUNET_free (neighbors.path);
1893 * Core handler for mesh network traffic
1895 * @param cls closure
1896 * @param message message
1897 * @param peer peer identity this notification is about
1898 * @param atsi performance data
1900 * @return GNUNET_OK to keep the connection open,
1901 * GNUNET_SYSERR to close it (signal serious error)
1904 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
1905 const struct GNUNET_MessageHeader *message,
1906 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1908 struct GNUNET_MESH_ToOrigin *msg;
1909 struct GNUNET_PeerIdentity id;
1910 struct MeshPeerInfo *peer_info;
1911 struct MeshTunnel *t;
1914 size = ntohs (message->size);
1915 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
1916 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
1918 GNUNET_break_op (0);
1921 msg = (struct GNUNET_MESH_ToOrigin *) message;
1922 t = tunnel_get (&msg->oid, ntohl (msg->tid));
1926 /* TODO notify that we dont know this tunnel (whom)? */
1930 if (t->id.oid == myid)
1932 if (NULL == t->client)
1934 /* got data packet for ownerless tunnel */
1935 GNUNET_break_op (0);
1938 /* TODO signature verification */
1939 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
1943 peer_info = peer_info_get (&msg->oid);
1944 if (NULL == peer_info)
1946 /* unknown origin of tunnel */
1950 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
1951 msg = GNUNET_malloc (size);
1952 memcpy (msg, message, size);
1953 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1954 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1955 &send_core_data_raw, msg);
1962 * Core handler for path ACKs
1964 * @param cls closure
1965 * @param message message
1966 * @param peer peer identity this notification is about
1967 * @param atsi performance data
1969 * @return GNUNET_OK to keep the connection open,
1970 * GNUNET_SYSERR to close it (signal serious error)
1972 * FIXME path change state
1975 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
1976 const struct GNUNET_MessageHeader *message,
1977 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1979 struct GNUNET_MESH_PathACK *msg;
1980 struct MeshTunnel *t;
1981 struct MeshPeerInfo *peer_info;
1983 msg = (struct GNUNET_MESH_PathACK *) message;
1984 t = tunnel_get (&msg->oid, msg->tid);
1987 /* TODO notify that we don't know the tunnel */
1991 /* Message for us? */
1992 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
1995 if (NULL == t->client)
2000 peer_info = peer_info_get (&msg->peer_id);
2001 if (NULL == peer_info)
2003 GNUNET_break_op (0);
2006 /* FIXME change state of peer */
2007 send_client_peer_connected(t, peer_info->id);
2011 peer_info = peer_info_get (&msg->oid);
2012 if (NULL == peer_info)
2014 /* If we know the tunnel, we should DEFINITELY know the peer */
2018 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2019 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2020 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2021 GNUNET_TIME_UNIT_FOREVER_REL,
2022 path_get_first_hop (t->tree,
2024 sizeof (struct GNUNET_MESH_PathACK),
2025 &send_core_data_raw, msg);
2031 * Functions to handle messages from core
2033 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2034 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2035 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2036 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2037 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2038 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2039 sizeof (struct GNUNET_MESH_PathACK)},
2045 /******************************************************************************/
2046 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2047 /******************************************************************************/
2050 * deregister_app: iterator for removing each application registered by a client
2052 * @param cls closure
2053 * @param key the hash of the application id (used to access the hashmap)
2054 * @param value the value stored at the key (client)
2056 * @return GNUNET_OK on success
2059 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2061 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2067 * notify_client_connection_failure: notify a client that the connection to the
2068 * requested remote peer is not possible (for instance, no route found)
2069 * Function called when the socket is ready to queue more data. "buf" will be
2070 * NULL and "size" zero if the socket was closed for writing in the meantime.
2072 * @param cls closure
2073 * @param size number of bytes available in buf
2074 * @param buf where the callee should write the message
2075 * @return number of bytes written to buf
2078 notify_client_connection_failure (void *cls, size_t size, void *buf)
2081 struct MeshPeerInfo *peer_info;
2082 struct GNUNET_MESH_PeerControl *msg;
2083 struct GNUNET_PeerIdentity id;
2085 if (0 == size && NULL == buf)
2087 // TODO retry? cancel?
2091 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2092 peer_info = (struct MeshPeerInfo *) cls;
2093 msg = (struct GNUNET_MESH_PeerControl *) buf;
2094 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2095 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2096 // msg->tunnel_id = htonl(peer_info->t->tid);
2097 GNUNET_PEER_resolve (peer_info->id, &id);
2098 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2106 * Function to process paths received for a new peer addition. The recorded
2107 * paths form the initial tunnel, which can be optimized later.
2108 * Called on each result obtained for the DHT search.
2110 * @param cls closure
2111 * @param exp when will this value expire
2112 * @param key key of the result
2113 * @param get_path NULL-terminated array of pointers
2114 * to the peers on reverse GET path (or NULL if not recorded)
2115 * @param put_path NULL-terminated array of pointers
2116 * to the peers on the PUT path (or NULL if not recorded)
2117 * @param type type of the result
2118 * @param size number of bytes in data
2119 * @param data pointer to the result data
2124 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2125 const GNUNET_HashCode * key,
2126 const struct GNUNET_PeerIdentity *const *get_path,
2127 const struct GNUNET_PeerIdentity *const *put_path,
2128 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2130 struct MeshPathInfo *path_info = cls;
2131 struct MeshPeerPath *p;
2132 struct GNUNET_PeerIdentity pi;
2135 if (NULL == get_path || NULL == put_path)
2137 if (NULL == path_info->peer->path_head)
2139 // Find ourselves some alternate initial path to the destination: retry
2140 GNUNET_DHT_get_stop (path_info->peer->dhtget);
2141 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2142 path_info->peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2143 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2144 GNUNET_BLOCK_TYPE_TEST, /* type */
2145 &pi.hashPubKey, /*key to search */
2146 4, /* replication level */
2147 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2150 0, /* xquery bits */
2152 (void *) path_info);
2157 p = path_build_from_dht (get_path, put_path);
2158 path_add_to_peer (path_info->peer, p);
2159 for (i = 0; i < path_info->peer->ntunnels; i++)
2161 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2163 GNUNET_free (path_info);
2170 * Function to process paths received for a new peer addition. The recorded
2171 * paths form the initial tunnel, which can be optimized later.
2172 * Called on each result obtained for the DHT search.
2174 * @param cls closure
2175 * @param exp when will this value expire
2176 * @param key key of the result
2177 * @param get_path NULL-terminated array of pointers
2178 * to the peers on reverse GET path (or NULL if not recorded)
2179 * @param put_path NULL-terminated array of pointers
2180 * to the peers on the PUT path (or NULL if not recorded)
2181 * @param type type of the result
2182 * @param size number of bytes in data
2183 * @param data pointer to the result data
2186 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2187 const GNUNET_HashCode * key,
2188 const struct GNUNET_PeerIdentity *const *get_path,
2189 const struct GNUNET_PeerIdentity *const *put_path,
2190 enum GNUNET_BLOCK_Type type, size_t size,
2193 const struct GNUNET_PeerIdentity *pi = data;
2194 struct GNUNET_PeerIdentity id;
2195 struct MeshTunnel *t = cls;
2196 struct MeshPeerInfo *peer_info;
2197 struct MeshPathInfo *path_info;
2198 struct MeshPeerPath *p;
2201 if (size != sizeof (struct GNUNET_PeerIdentity))
2203 GNUNET_break_op (0);
2206 GNUNET_assert (NULL != t->client);
2207 GNUNET_DHT_get_stop (t->client->dht_get_type);
2208 t->client->dht_get_type = NULL;
2209 peer_info = peer_info_get (pi);
2210 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2211 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2213 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2214 NULL == peer_info->dhtget)
2216 /* we don't have a route to the peer, let's try a direct lookup */
2217 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle,
2219 GNUNET_TIME_UNIT_FOREVER_REL,
2221 GNUNET_BLOCK_TYPE_TEST,
2224 /* key to look up */
2226 /* replication level */
2227 GNUNET_DHT_RO_RECORD_ROUTE,
2228 /* option to dht: record route */
2229 NULL, /* bloom filter */
2232 0, /* xquery bits */
2235 peer_info); /* closure */
2238 p = path_build_from_dht (get_path, put_path);
2239 path_add_to_peer (peer_info, p);
2240 tunnel_add_peer(t, peer_info);
2241 p = tree_get_path_to_peer(t->tree, peer_info->id);
2243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2244 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2245 t->local_tid, p->length);
2246 for (i = 0; i < p->length; i++)
2248 GNUNET_PEER_resolve (p->peers[0], &id);
2249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2250 GNUNET_h2s_full (&id.hashPubKey));
2256 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2258 path_info->peer = peer_info;
2259 path_info->path = p;
2260 GNUNET_PEER_resolve (p->peers[1], &id);
2261 GNUNET_CORE_notify_transmit_ready (core_handle,
2267 GNUNET_TIME_UNIT_FOREVER_REL,
2271 sizeof (struct GNUNET_MESH_ManipulatePath)
2274 sizeof (struct GNUNET_PeerIdentity)),
2276 &send_core_create_path,
2278 path_info); /* cls */
2282 send_client_peer_connected(t, myid);
2285 /******************************************************************************/
2286 /********************* MESH LOCAL HANDLES **************************/
2287 /******************************************************************************/
2291 * Handler for client disconnection
2293 * @param cls closure
2294 * @param client identification of the client; NULL
2295 * for the last call when the server is destroyed
2298 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2300 struct MeshClient *c;
2301 struct MeshClient *next;
2303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2309 if (c->handle != client && NULL != client)
2311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2316 if (NULL != c->tunnels)
2318 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2319 &tunnel_destroy_iterator,
2321 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2324 /* deregister clients applications */
2325 if (NULL != c->apps)
2327 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2328 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2330 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2331 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2333 GNUNET_SCHEDULER_cancel (announce_applications_task);
2334 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2336 if (NULL != c->types)
2337 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2338 if (NULL != c->dht_get_type)
2339 GNUNET_DHT_get_stop (c->dht_get_type);
2340 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2352 * Handler for new clients
2354 * @param cls closure
2355 * @param client identification of the client
2356 * @param message the actual message, which includes messages the client wants
2359 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2360 const struct GNUNET_MessageHeader *message)
2362 struct GNUNET_MESH_ClientConnect *cc_msg;
2363 struct MeshClient *c;
2364 GNUNET_MESH_ApplicationType *a;
2371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2372 /* Check data sanity */
2373 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2374 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2375 ntypes = ntohs (cc_msg->types);
2376 napps = ntohs (cc_msg->applications);
2378 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2381 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2385 /* Create new client structure */
2386 c = GNUNET_malloc (sizeof (struct MeshClient));
2388 c->id = next_client_id++;
2391 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2394 GNUNET_MESH_ApplicationType at;
2397 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2398 for (i = 0; i < napps; i++)
2401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2402 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2403 /* store in clients hashmap */
2404 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2405 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2406 /* store in global hashmap, for announcements */
2407 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2408 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2410 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2411 announce_applications_task =
2412 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2420 t = (uint16_t *) & a[napps];
2421 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2422 for (i = 0; i < ntypes; i++)
2425 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2427 /* store in clients hashmap */
2428 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2429 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2430 /* store in global hashmap */
2431 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2432 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2436 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2438 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2439 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2440 GNUNET_SERVER_notification_context_add (nc, client);
2442 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2450 * Handler for requests of new tunnels
2452 * @param cls closure
2453 * @param client identification of the client
2454 * @param message the actual message
2457 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2458 const struct GNUNET_MessageHeader *message)
2460 struct GNUNET_MESH_TunnelMessage *t_msg;
2461 struct MeshTunnel *t;
2462 struct MeshClient *c;
2463 GNUNET_HashCode hash;
2465 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2467 /* Sanity check for client registration */
2468 if (NULL == (c = client_get (client)))
2471 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2478 /* Message sanity check */
2479 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2482 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2486 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2487 /* Sanity check for tunnel numbering */
2488 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2491 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2494 /* Sanity check for duplicate tunnel IDs */
2495 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2498 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2502 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2504 while (NULL != tunnel_get_by_pi (myid, next_tid))
2505 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2506 t->id.tid = next_tid++;
2508 t->local_tid = ntohl (t_msg->tunnel_id);
2510 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2512 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2514 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2515 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2518 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2522 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2524 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2525 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2528 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2531 t->tree = tree_new (t, myid);
2532 t->tree->refresh = REFRESH_PATH_TIME;
2533 t->tree->root->status = MESH_PEER_READY;
2534 t->tree->me = t->tree->root;
2536 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2542 * Handler for requests of deleting tunnels
2544 * @param cls closure
2545 * @param client identification of the client
2546 * @param message the actual message
2549 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2550 const struct GNUNET_MessageHeader *message)
2552 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2553 struct MeshClient *c;
2554 struct MeshTunnel *t;
2555 MESH_TunnelNumber tid;
2556 GNUNET_HashCode hash;
2558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2560 /* Sanity check for client registration */
2561 if (NULL == (c = client_get (client)))
2564 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2567 /* Message sanity check */
2568 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2571 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2577 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2579 /* Retrieve tunnel */
2580 tid = ntohl (tunnel_msg->tunnel_id);
2582 /* Remove from local id hashmap */
2583 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2584 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2585 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2587 /* Remove from global id hashmap */
2588 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2589 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2591 // notify_tunnel_destroy(t); FIXME
2593 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2599 * Handler for connection requests to new peers
2601 * @param cls closure
2602 * @param client identification of the client
2603 * @param message the actual message (PeerControl)
2608 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2609 const struct GNUNET_MessageHeader *message)
2611 struct GNUNET_MESH_PeerControl *peer_msg;
2612 struct MeshClient *c;
2613 struct MeshTunnel *t;
2614 MESH_TunnelNumber tid;
2615 struct MeshPeerInfo *peer_info;
2618 /* Sanity check for client registration */
2619 if (NULL == (c = client_get (client)))
2622 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2626 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2627 /* Sanity check for message size */
2628 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2631 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2635 /* Tunnel exists? */
2636 tid = ntohl (peer_msg->tunnel_id);
2637 t = tunnel_get_by_local_id (c, tid);
2641 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2645 /* Does client own tunnel? */
2646 if (t->client->handle != client)
2649 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2654 peer_info = peer_info_get (&peer_msg->peer);
2656 /* Start DHT search if needed FIXME: if not already connected */
2657 if (NULL == peer_info->dhtget)
2659 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_BLOCK_TYPE_TEST, &peer_msg->peer.hashPubKey, 4, /* replication level */
2660 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2663 0, /* xquery bits */
2665 (void *) peer_info);
2668 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2674 * Handler for disconnection requests of peers in a tunnel
2676 * @param cls closure
2677 * @param client identification of the client
2678 * @param message the actual message (PeerControl)
2681 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2682 const struct GNUNET_MessageHeader *message)
2684 struct GNUNET_MESH_PeerControl *peer_msg;
2685 struct MeshClient *c;
2686 struct MeshTunnel *t;
2687 MESH_TunnelNumber tid;
2689 /* Sanity check for client registration */
2690 if (NULL == (c = client_get (client)))
2693 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2696 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2697 /* Sanity check for message size */
2698 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2701 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2705 /* Tunnel exists? */
2706 tid = ntohl (peer_msg->tunnel_id);
2707 t = tunnel_get_by_local_id (c, tid);
2711 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2715 /* Does client own tunnel? */
2716 if (t->client->handle != client)
2719 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2723 /* Ok, delete peer from tunnel */
2724 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2725 &peer_msg->peer.hashPubKey);
2727 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2733 * Handler for connection requests to new peers by type
2735 * @param cls closure
2736 * @param client identification of the client
2737 * @param message the actual message (ConnectPeerByType)
2740 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2741 const struct GNUNET_MessageHeader *message)
2743 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2744 struct MeshClient *c;
2745 struct MeshTunnel *t;
2746 GNUNET_HashCode hash;
2747 GNUNET_MESH_ApplicationType type;
2748 MESH_TunnelNumber tid;
2750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
2751 /* Sanity check for client registration */
2752 if (NULL == (c = client_get (client)))
2755 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2759 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2760 /* Sanity check for message size */
2761 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
2762 ntohs (connect_msg->header.size))
2765 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2769 /* Tunnel exists? */
2770 tid = ntohl (connect_msg->tunnel_id);
2771 t = tunnel_get_by_local_id (c, tid);
2775 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2779 /* Does client own tunnel? */
2780 if (t->client->handle != client)
2783 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2787 /* Do WE have the service? */
2788 type = ntohl (connect_msg->type);
2789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", type);
2790 GNUNET_CRYPTO_hash (&type, sizeof (GNUNET_MESH_ApplicationType), &hash);
2791 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
2794 /* Yes! Fast forward, add ourselves to the tunnel and send the
2795 * good news to the client
2797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
2798 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
2799 peer_info_get (&my_full_id),
2800 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
2803 send_client_peer_connected(t, myid);
2804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
2805 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2808 /* Ok, lets find a peer offering the service */
2809 if (c->dht_get_type)
2811 GNUNET_DHT_get_stop (c->dht_get_type);
2813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
2814 GNUNET_h2s_full (&hash));
2816 GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
2817 GNUNET_BLOCK_TYPE_TEST, &hash, 10U,
2818 GNUNET_DHT_RO_RECORD_ROUTE, NULL, 0, NULL, 0,
2819 &dht_get_type_handler, t);
2821 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2827 * Handler for client traffic directed to one peer
2829 * @param cls closure
2830 * @param client identification of the client
2831 * @param message the actual message
2834 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
2835 const struct GNUNET_MessageHeader *message)
2837 struct MeshClient *c;
2838 struct MeshTunnel *t;
2839 struct MeshPeerInfo *pi;
2840 struct GNUNET_MESH_Unicast *data_msg;
2841 struct MeshDataDescriptor *info;
2842 MESH_TunnelNumber tid;
2845 /* Sanity check for client registration */
2846 if (NULL == (c = client_get (client)))
2849 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2852 data_msg = (struct GNUNET_MESH_Unicast *) message;
2853 /* Sanity check for message size */
2854 if (sizeof (struct GNUNET_MESH_Unicast) +
2855 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
2858 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2862 /* Tunnel exists? */
2863 tid = ntohl (data_msg->tid);
2864 t = tunnel_get_by_local_id (c, tid);
2868 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2872 /* Is it a local tunnel? Then, does client own the tunnel? */
2873 if (t->client->handle != NULL && t->client->handle != client)
2876 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2880 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2881 &data_msg->destination.hashPubKey);
2882 /* Is the selected peer in the tunnel? */
2886 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2891 struct GNUNET_MESH_Unicast copy;
2893 /* Work around const limitation */
2894 memcpy (©, data_msg, sizeof (struct GNUNET_MESH_Unicast));
2895 copy.oid = my_full_id;
2896 copy.tid = htonl (t->id.tid);
2897 handle_mesh_data_unicast (NULL, &my_full_id, ©.header, NULL);
2900 data_size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Unicast);
2901 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + data_size);
2902 memcpy (&info[1], &data_msg[1], data_size);
2903 info->destination = pi->id;
2904 info->origin = &t->id;
2905 info->size = data_size;
2906 info->client = client;
2907 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2908 GNUNET_TIME_UNIT_FOREVER_REL,
2909 path_get_first_hop (t->tree, pi->id),
2910 /* FIXME re-check types */
2912 sizeof (struct GNUNET_MESH_Unicast),
2913 &send_core_data_unicast, info);
2918 * Handler for client traffic directed to all peers in a tunnel
2920 * @param cls closure
2921 * @param client identification of the client
2922 * @param message the actual message
2925 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
2926 const struct GNUNET_MessageHeader *message)
2928 struct MeshClient *c;
2929 struct MeshTunnel *t;
2930 struct GNUNET_MESH_Multicast *data_msg;
2931 MESH_TunnelNumber tid;
2933 /* Sanity check for client registration */
2934 if (NULL == (c = client_get (client)))
2937 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2940 data_msg = (struct GNUNET_MESH_Multicast *) message;
2941 /* Sanity check for message size */
2942 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
2945 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2949 /* Tunnel exists? */
2950 tid = ntohl (data_msg->tid);
2951 t = tunnel_get_by_local_id (c, tid);
2955 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2959 /* Does client own tunnel? */
2960 if (t->client->handle != client)
2963 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2969 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2974 * Functions to handle messages from clients
2976 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
2977 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
2978 {&handle_local_tunnel_create, NULL,
2979 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
2980 sizeof (struct GNUNET_MESH_TunnelMessage)},
2981 {&handle_local_tunnel_destroy, NULL,
2982 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
2983 sizeof (struct GNUNET_MESH_TunnelMessage)},
2984 {&handle_local_connect_add, NULL,
2985 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
2986 sizeof (struct GNUNET_MESH_PeerControl)},
2987 {&handle_local_connect_del, NULL,
2988 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
2989 sizeof (struct GNUNET_MESH_PeerControl)},
2990 {&handle_local_connect_by_type, NULL,
2991 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
2992 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
2993 {&handle_local_unicast, NULL,
2994 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2995 {&handle_local_unicast, NULL,
2996 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2997 {&handle_local_multicast, NULL,
2998 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3004 * To be called on core init/fail.
3006 * @param cls service closure
3007 * @param server handle to the server for this service
3008 * @param identity the public identity of this peer
3009 * @param publicKey the public key of this peer
3012 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3013 const struct GNUNET_PeerIdentity *identity,
3014 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
3016 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3017 core_handle = server;
3018 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3020 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3021 GNUNET_SCHEDULER_shutdown();
3027 * Method called whenever a given peer connects.
3029 * @param cls closure
3030 * @param peer peer identity this notification is about
3031 * @param atsi performance data for the connection
3034 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3035 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3037 // GNUNET_PEER_Id pid;
3038 struct MeshPeerInfo *peer_info;
3039 struct MeshPeerPath *path;
3041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3042 peer_info = peer_info_get (peer);
3043 if (myid == peer_info->id)
3045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3048 path = path_new (2);
3049 path->peers[0] = myid;
3050 path->peers[1] = peer_info->id;
3051 path_add_to_peer (peer_info, path);
3056 * Method called whenever a peer disconnects.
3058 * @param cls closure
3059 * @param peer peer identity this notification is about
3062 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3064 struct MeshPeerInfo *pi;
3067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3068 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3074 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3076 if (pi->core_transmit[i])
3078 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
3079 /* TODO: notify that tranmission has failed */
3080 GNUNET_free (pi->infos[i]);
3083 path_remove_from_peer (pi, pi->id, myid);
3086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3092 /******************************************************************************/
3093 /************************ MAIN FUNCTIONS ****************************/
3094 /******************************************************************************/
3097 * Task run during shutdown.
3103 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3105 struct MeshClient *c;
3107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3108 if (core_handle != NULL)
3110 GNUNET_CORE_disconnect (core_handle);
3113 if (dht_handle != NULL)
3115 for (c = clients; NULL != c; c = c->next)
3116 if (NULL != c->dht_get_type)
3117 GNUNET_DHT_get_stop (c->dht_get_type);
3118 GNUNET_DHT_disconnect (dht_handle);
3123 GNUNET_SERVER_notification_context_destroy (nc);
3126 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3128 GNUNET_SCHEDULER_cancel (announce_id_task);
3129 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3131 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3135 * Process mesh requests.
3137 * @param cls closure
3138 * @param server the initialized server
3139 * @param c configuration to use
3142 run (void *cls, struct GNUNET_SERVER_Handle *server,
3143 const struct GNUNET_CONFIGURATION_Handle *c)
3145 struct MeshPeerInfo *peer;
3146 struct MeshPeerPath *p;
3149 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3150 server_handle = server;
3151 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3152 CORE_QUEUE_SIZE, /* queue size */
3153 NULL, /* Closure passed to MESH functions */
3154 &core_init, /* Call core_init once connected */
3155 &core_connect, /* Handle connects */
3156 &core_disconnect, /* remove peers on disconnects */
3157 NULL, /* Do we care about "status" updates? */
3158 NULL, /* Don't notify about all incoming messages */
3159 GNUNET_NO, /* For header only in notification */
3160 NULL, /* Don't notify about all outbound messages */
3161 GNUNET_NO, /* For header-only out notification */
3162 core_handlers); /* Register these handlers */
3163 if (core_handle == NULL)
3166 GNUNET_SCHEDULER_shutdown ();
3171 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
3174 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3176 ("Mesh service is lacking key configuration settings. Exiting.\n"));
3177 GNUNET_SCHEDULER_shutdown ();
3180 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
3181 GNUNET_free (keyfile);
3182 if (my_private_key == NULL)
3184 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3185 _("Mesh service could not access hostkey. Exiting.\n"));
3186 GNUNET_SCHEDULER_shutdown ();
3189 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
3190 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
3191 &my_full_id.hashPubKey);
3192 myid = GNUNET_PEER_intern (&my_full_id);
3194 dht_handle = GNUNET_DHT_connect (c, 64);
3195 if (dht_handle == NULL)
3197 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Error connecting to DHT.\
3198 Running without DHT has a severe\
3199 impact in MESH capabilities.\n\
3200 Plase check your configuretion and enable DHT.\n");
3206 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3207 peers = GNUNET_CONTAINER_multihashmap_create (32);
3208 applications = GNUNET_CONTAINER_multihashmap_create (32);
3209 types = GNUNET_CONTAINER_multihashmap_create (32);
3211 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
3212 nc = GNUNET_SERVER_notification_context_create (server_handle,
3214 GNUNET_SERVER_disconnect_notify (server_handle,
3215 &handle_local_client_disconnect,
3220 clients_tail = NULL;
3225 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3226 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3228 /* Create a peer_info for the local peer */
3229 peer = peer_info_get(&my_full_id);
3232 path_add_to_peer(peer, p);
3234 /* Scheduled the task to clean up when shutdown is called */
3235 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3242 * The main function for the mesh service.
3244 * @param argc number of arguments from the command line
3245 * @param argv command line arguments
3246 * @return 0 ok, 1 on error
3249 main (int argc, char *const *argv)
3254 fprintf (stderr, "main ()\n");
3256 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3259 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");
3263 fprintf (stderr, "main () END\n");