2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - add connection confirmation message
44 * - handle trnsmt_rdy return values
48 #include "gnunet_common.h"
49 #include "gnunet_util_lib.h"
50 #include "gnunet_peer_lib.h"
51 #include "gnunet_core_service.h"
52 #include "gnunet_protocols.h"
55 #include "mesh_protocol.h"
56 #include "gnunet_dht_service.h"
58 #define MESH_DEBUG GNUNET_YES
62 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
63 * @param cls string to print
64 * @param tc task context
67 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
71 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
75 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
79 /* TODO: move into configuration file */
80 #define CORE_QUEUE_SIZE 10
81 #define LOCAL_QUEUE_SIZE 100
82 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
83 GNUNET_TIME_UNIT_SECONDS,\
85 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
86 GNUNET_TIME_UNIT_SECONDS,\
89 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
90 GNUNET_TIME_UNIT_SECONDS,\
93 /******************************************************************************/
94 /************************ ENUMERATIONS ****************************/
95 /******************************************************************************/
98 * All the states a peer participating in a tunnel can be in.
103 * Peer only retransmits traffic, is not a final destination
108 * Path to the peer not known yet
113 * Request sent, not yet answered.
118 * Peer connected and ready to accept data
123 * Peer connected previosly but not responding
125 MESH_PEER_RECONNECTING
129 /******************************************************************************/
130 /************************ DATA STRUCTURES ****************************/
131 /******************************************************************************/
134 * Information regarding a possible path to reach a single peer
142 struct MeshPeerPath *next;
143 struct MeshPeerPath *prev;
146 * List of all the peers that form the path from origin to target.
148 GNUNET_PEER_Id *peers;
151 * Number of peers (hops) in the path
159 * Node of path tree for a tunnel
161 struct MeshTunnelPathNode
164 * Tunnel this node belongs to (and therefore tree)
166 struct MeshTunnel *t;
169 * Peer this node describes
171 struct MeshPeerInfo *peer;
174 * Parent node in the tree
176 struct MeshTunnelPathNode *parent;
181 struct MeshTunnelPathNode *children;
186 unsigned int nchildren;
189 * Status of the peer in the tunnel
191 enum MeshPeerState status;
196 * Tree to reach all peers in the tunnel
198 struct MeshTunnelPath
201 * Tunnel this path belongs to
203 struct MeshTunnel *t;
206 * Root node of peer tree
208 struct MeshTunnelPathNode *root;
211 * Node that represents our position in the tree (for non local tunnels)
213 struct MeshTunnelPathNode *me;
216 * Cache of all peers and the first hop to them.
217 * Indexed by Peer_Identity, contains a pointer to the PeerInfo of 1st hop.
219 struct GNUNET_CONTAINER_MultiHashMap *first_hops;
224 /** FWD declaration */
228 * Struct containing all info possibly needed to build a package when called
231 struct MeshDataDescriptor
233 /** ID of the tunnel this packet travels in */
234 struct MESH_TunnelID *origin;
236 /** Ultimate destination of the packet */
237 GNUNET_PEER_Id destination;
239 /** Number of identical messages sent to different hops (multicast) */
242 /** Size of the data */
245 /** Client that asked for the transmission, if any */
246 struct GNUNET_SERVER_Client *client;
248 /** Who was is message being sent to */
249 struct MeshPeerInfo *peer;
251 /** Which handler was used to request the transmission */
252 unsigned int handler_n;
254 /* Data at the end */
259 * Struct containing all information regarding a given peer
269 * Last time we heard from this peer
271 struct GNUNET_TIME_Absolute last_contact;
274 * Number of attempts to reconnect so far
276 int n_reconnect_attempts;
279 * Paths to reach the peer, ordered by ascending hop count
281 struct MeshPeerPath *path_head;
284 * Paths to reach the peer, ordered by ascending hop count
286 struct MeshPeerPath *path_tail;
289 * Handle to stop the DHT search for a path to this peer
291 struct GNUNET_DHT_GetHandle *dhtget;
294 * Handles to stop queued transmissions for this peer
296 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
299 * Pointer to info stuctures used as cls for queued transmissions
301 struct MeshDataDescriptor *infos[CORE_QUEUE_SIZE];
304 * Array of tunnels this peer participates in
305 * (most probably a small amount, therefore not a hashmap)
306 * When the path to the peer changes, notify these tunnels to let them
307 * re-adjust their path trees.
309 struct MeshTunnel **tunnels;
312 * Number of tunnels above
314 unsigned int ntunnels;
319 * Data scheduled to transmit (to local client or remote peer)
326 struct MeshQueue *next;
327 struct MeshQueue *prev;
330 * Target of the data (NULL if target is client)
332 struct MeshPeerInfo *peer;
335 * Client to send the data to (NULL if target is peer)
337 struct MeshClient *client;
340 * Size of the message to transmit
345 * How old is the data?
347 struct GNUNET_TIME_Absolute timestamp;
352 struct GNUNET_MessageHeader *data;
356 * Globally unique tunnel identification (owner + number)
357 * DO NOT USE OVER THE NETWORK
362 * Node that owns the tunnel
367 * Tunnel number to differentiate all the tunnels owned by the node oid
368 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
370 MESH_TunnelNumber tid;
374 struct MeshClient; /* FWD declaration */
377 * Struct containing all information regarding a tunnel
378 * For an intermediate node the improtant info used will be:
379 * - id Tunnel unique identification
380 * - paths[0] To know where to send it next
381 * - metainfo: ready, speeds, accounting
388 struct MESH_TunnelID id;
391 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
393 MESH_TunnelNumber local_tid;
396 * Last time the tunnel was used
398 struct GNUNET_TIME_Absolute timestamp;
401 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
403 struct GNUNET_CONTAINER_MultiHashMap *peers;
406 * Number of peers that are connected and potentially ready to receive data
408 unsigned int peers_ready;
411 * Number of peers that have been added to the tunnel
413 unsigned int peers_total;
416 * Client owner of the tunnel, if any
418 struct MeshClient *client;
421 * Messages ready to transmit
423 struct MeshQueue *queue_head;
424 struct MeshQueue *queue_tail;
429 struct MeshTunnelPath *paths;
432 * Task to keep the used paths alive
434 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
439 * Info needed to work with tunnel paths and peers
446 struct MeshTunnel *t;
451 struct MeshPeerInfo *peer;
456 struct MeshPeerPath *path;
461 * Struct containing information about a client of the service
468 struct MeshClient *next;
469 struct MeshClient *prev;
472 * Tunnels that belong to this client, indexed by local id
474 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
477 * Handle to communicate with the client
479 struct GNUNET_SERVER_Client *handle;
482 * Applications that this client has claimed to provide
484 struct GNUNET_CONTAINER_MultiHashMap *apps;
487 * Messages that this client has declared interest in
489 struct GNUNET_CONTAINER_MultiHashMap *types;
492 * Used to search peers offering a service
494 struct GNUNET_DHT_GetHandle *dht_get_type;
498 * ID of the client, for debug messages
505 /******************************************************************************/
506 /*********************** GLOBAL VARIABLES ****************************/
507 /******************************************************************************/
512 static struct MeshClient *clients;
513 static struct MeshClient *clients_tail;
516 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
518 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
521 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
523 static struct GNUNET_CONTAINER_MultiHashMap *peers;
526 * Handle to communicate with core
528 static struct GNUNET_CORE_Handle *core_handle;
533 static struct GNUNET_DHT_Handle *dht_handle;
538 static struct GNUNET_SERVER_Handle *server_handle;
541 * Notification context, to send messages to local clients
543 static struct GNUNET_SERVER_NotificationContext *nc;
546 * Local peer own ID (memory efficient handle)
548 static GNUNET_PEER_Id myid;
551 * Local peer own ID (full value)
553 static struct GNUNET_PeerIdentity my_full_id;
556 * Tunnel ID for the next created tunnel (global tunnel number)
558 static MESH_TunnelNumber next_tid;
561 * All application types provided by this peer
563 static struct GNUNET_CONTAINER_MultiHashMap *applications;
566 * All message types clients of this peer are interested in
568 static struct GNUNET_CONTAINER_MultiHashMap *types;
571 * Task to periodically announce provided applications
573 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
576 * Task to periodically announce itself in the network
578 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
581 unsigned int next_client_id;
585 /******************************************************************************/
586 /************************ PERIODIC FUNCTIONS ****************************/
587 /******************************************************************************/
590 * Announce iterator over for each application provided by the peer
593 * @param key current key code
594 * @param value value in the hash map
595 * @return GNUNET_YES if we should continue to
600 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
602 /* FIXME are hashes in multihash map equal on all aquitectures? */
603 GNUNET_DHT_put (dht_handle, key, 10U, GNUNET_DHT_RO_RECORD_ROUTE,
604 GNUNET_BLOCK_TYPE_TEST, sizeof (struct GNUNET_PeerIdentity),
605 (const char *) &my_full_id,
607 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
608 &mesh_debug, "DHT_put for app completed");
610 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
612 APP_ANNOUNCE_TIME, NULL, NULL);
619 * Periodically announce what applications are provided by local clients
622 * @param tc task context
625 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
627 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
629 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
633 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
635 announce_applications_task =
636 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
644 * Periodically announce self id in the DHT
647 * @param tc task context
650 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
652 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
654 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
658 * - Set data expiration in function of X
661 GNUNET_DHT_put (dht_handle, /* DHT handle */
662 &my_full_id.hashPubKey, /* Key to use */
663 10U, /* Replication level */
664 GNUNET_DHT_RO_RECORD_ROUTE, /* DHT options */
665 GNUNET_BLOCK_TYPE_TEST, /* Block type */
666 0, /* Size of the data */
667 NULL, /* Data itself */
668 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
669 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
671 &mesh_debug, "DHT_put for id completed");
673 NULL, /* Continuation */
674 NULL); /* Continuation closure */
677 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
682 * Send keepalive packets for a peer
690 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
692 struct MeshTunnel *t = cls;
694 // struct GNUNET_PeerIdentity id;
696 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
700 /* FIXME implement multicast keepalive. Just an empty multicast packet? */
701 // GNUNET_PEER_resolve (path_get_first_hop (path->t, path->peer)->id, &id);
702 // GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
703 // GNUNET_TIME_UNIT_FOREVER_REL, &id,
704 // sizeof (struct GNUNET_MESH_ManipulatePath)
706 // (path->path->length *
707 // sizeof (struct GNUNET_PeerIdentity)),
708 // &send_core_create_path,
710 t->path_refresh_task =
711 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
716 /******************************************************************************/
717 /****************** GENERAL HELPER FUNCTIONS ************************/
718 /******************************************************************************/
721 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
722 * and insert it in the appropiate structures if the peer is not known yet.
724 * @param peer Identity of the peer
726 * @return Existing or newly created peer info
728 static struct MeshPeerInfo *
729 peer_info_get (const struct GNUNET_PeerIdentity *peer)
731 struct MeshPeerInfo *peer_info;
733 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
734 if (NULL == peer_info)
737 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
738 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
739 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
740 peer_info->id = GNUNET_PEER_intern (peer);
749 * Destroy the peer_info and free any allocated resources linked to it
750 * @param t tunnel the path belongs to
751 * @param pi the peer_info to destroy
752 * @return GNUNET_OK on success
755 peer_info_destroy (struct MeshPeerInfo *pi)
757 GNUNET_HashCode hash;
758 struct GNUNET_PeerIdentity id;
760 GNUNET_PEER_resolve (pi->id, &id);
761 GNUNET_PEER_change_rc (pi->id, -1);
762 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
764 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
765 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
773 * Destroy the path and free any allocated resources linked to it
775 * @param p the path to destroy
777 * @return GNUNET_OK on success
780 path_destroy (struct MeshPeerPath *p)
782 GNUNET_PEER_decrement_rcs (p->peers, p->length);
783 GNUNET_free (p->peers);
792 * @param p the path to invert
795 path_invert (struct MeshPeerPath *path)
800 for (i = 0; i < path->length / 2; i++)
802 aux = path->peers[i];
803 path->peers[i] = path->peers[path->length - i - 1];
804 path->peers[path->length - i - 1] = aux;
810 * Find the first peer whom to send a packet to go down this path
812 * @param t The tunnel to use
813 * @param peer The peerinfo of the peer we are trying to reach
815 * @return peerinfo of the peer who is the first hop in the tunnel
818 static struct MeshPeerInfo *
819 path_get_first_hop (struct MeshTunnel *t, struct MeshPeerInfo *peer)
821 struct GNUNET_PeerIdentity id;
823 GNUNET_PEER_resolve (peer->id, &id);
824 return GNUNET_CONTAINER_multihashmap_get (t->paths->first_hops,
830 * Get the length of a path
832 * @param path The path to measure, with the local peer at any point of it
834 * @return Number of hops to reach destination
835 * UINT_MAX in case the peer is not in the path
838 path_get_length (struct MeshPeerPath *path)
844 for (i = 0; i < path->length; i++)
846 if (path->peers[i] == myid)
848 return path->length - i;
856 * Get the cost of the path relative to the already built tunnel tree
858 * @param t The tunnel to which compare
859 * @param path The individual path to reach a peer
861 * @return Number of hops to reach destination, UINT_MAX in case the peer is not
864 * TODO: remove dummy implementation, look into the tunnel tree
867 path_get_cost (struct MeshTunnel *t, struct MeshPeerPath *path)
869 return path_get_length (path);
874 * Add the path to the peer and update the path used to reach it in case this
877 * @param peer_info Destination peer to add the path to.
878 * @param path New path to add. Last peer must be the peer in arg 1.
880 * TODO: trim the part from origin to us? Add it as path to origin?
883 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
886 struct MeshPeerPath *aux;
888 if (NULL == peer_info || NULL == path)
894 l = path_get_length (path);
896 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
898 if (path_get_length (aux) > l)
900 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
901 peer_info->path_tail, aux, path);
904 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
911 * Notify a tunnel that a connection has broken that affects at least
914 * @param t Tunnel affected
915 * @param peer Peer that (at least) has been affected by the disconnection
916 * @param p1 Peer that got disconnected from p2
917 * @param p2 Peer that got disconnected from p1
920 tunnel_notify_connection_broken (struct MeshTunnel *t,
921 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
926 * Remove all paths that rely on a direct connection between p1 and p2
927 * from the peer itself and notify all tunnels about it.
929 * @param pi PeerInfo of affected peer
930 * @param p1 GNUNET_PEER_Id of one peer.
931 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
935 path_remove_from_peer (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
938 struct MeshPeerPath *p;
939 struct MeshPeerPath *aux;
940 unsigned int destroyed;
948 for (i = 0; i < (p->length - 1); i++)
950 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
951 (p->peers[i] == p2 && p->peers[i + 1] == p1))
963 for (i = 0; i < peer->ntunnels; i++)
965 tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
971 * Add the path to the origin peer and update the path used to reach it in case
972 * this is the shortest.
973 * The path is given in peer_info -> destination, therefore we turn the path
976 * @param peer_info Peer to add the path to, being the origin of the path.
977 * @param path New path to add after being inversed.
980 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
983 path_add_to_peer (peer_info, path);
988 * Build a PeerPath from the paths returned from the DHT, reversing the paths
989 * to obtain a local peer -> destination path and interning the peer ids.
991 * @param get_path NULL-terminated array of pointers
992 * to the peers on reverse GET path (or NULL if not recorded)
993 * @param put_path NULL-terminated array of pointers
994 * to the peers on the PUT path (or NULL if not recorded)
996 * @return Newly allocated and created path
998 static struct MeshPeerPath *
999 path_build_from_dht (const struct GNUNET_PeerIdentity *const *get_path,
1000 const struct GNUNET_PeerIdentity *const *put_path)
1002 struct MeshPeerPath *p;
1005 p = GNUNET_malloc (sizeof (struct MeshPeerPath));
1006 for (i = 0; get_path[i] != NULL; i++) ;
1007 for (i--; i >= 0; i--)
1010 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1011 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1014 for (i = 0; put_path[i] != NULL; i++) ;
1015 for (i--; i >= 0; i--)
1018 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1019 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
1027 * Check if client has registered with the service and has not disconnected
1029 * @param client the client to check
1031 * @return non-NULL if client exists in the global DLL
1033 static struct MeshClient *
1034 client_get (struct GNUNET_SERVER_Client *client)
1036 struct MeshClient *c;
1041 if (c->handle == client)
1050 * Checks if a given client has subscribed to certain message type
1052 * @param message_type Type of message to check
1053 * @param c Client to check
1055 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1060 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1064 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1065 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1070 * Search for a tunnel among the tunnels for a client
1072 * @param c the client whose tunnels to search in
1073 * @param tid the local id of the tunnel
1075 * @return tunnel handler, NULL if doesn't exist
1077 static struct MeshTunnel *
1078 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1080 GNUNET_HashCode hash;
1082 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1083 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1088 * Search for a tunnel by global ID using PEER_ID
1090 * @param pi owner of the tunnel
1091 * @param tid global tunnel number
1093 * @return tunnel handler, NULL if doesn't exist
1095 static struct MeshTunnel *
1096 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1098 struct MESH_TunnelID id;
1099 GNUNET_HashCode hash;
1104 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1105 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1111 * Search for a tunnel by global ID using full PeerIdentities
1113 * @param oid owner of the tunnel
1114 * @param tid global tunnel number
1116 * @return tunnel handler, NULL if doesn't exist
1118 static struct MeshTunnel *
1119 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1121 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1126 * Recursively find the given peer in the tree.
1128 * @param t Tunnel where to add the new path.
1129 * @param p Path to look for.
1131 * @return Pointer to the node of the peer. NULL if not found.
1133 static struct MeshTunnelPathNode *
1134 tunnel_find_peer (struct MeshTunnelPathNode *root, struct MeshPeerInfo *peer)
1136 struct MeshTunnelPathNode *n;
1139 if (root->peer == peer)
1141 for (i = 0; i < root->nchildren; i++)
1143 n = tunnel_find_peer (&root->children[i], peer);
1152 * Recusively mark peer and children as disconnected, notify client
1154 * @param parent Node to be clean, potentially with children
1157 tunnel_mark_peers_disconnected (struct MeshTunnelPathNode *parent)
1159 struct GNUNET_MESH_PeerControl msg;
1162 parent->status = MESH_PEER_RECONNECTING;
1163 for (i = 0; i < parent->nchildren; i++)
1165 tunnel_mark_peers_disconnected (&parent->children[i]);
1167 if (NULL == parent->t->client)
1169 msg.header.size = htons (sizeof (msg));
1170 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1171 msg.tunnel_id = htonl (parent->t->local_tid);
1172 GNUNET_PEER_resolve (parent->peer->id, &msg.peer);
1173 GNUNET_SERVER_notification_context_unicast (nc, parent->t->client->handle,
1174 &msg.header, GNUNET_NO);
1178 * Delete the current path to the peer, including all now unused relays.
1180 * @param t Tunnel where to add the new path.
1181 * @param p Path to be integrated.
1183 * @return pointer to the pathless node, NULL on error
1185 * TODO: notify peers of deletion
1187 static struct MeshTunnelPathNode *
1188 tunnel_del_path (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1190 struct MeshTunnelPathNode *parent;
1191 struct MeshTunnelPathNode *node;
1192 struct MeshTunnelPathNode *n;
1194 node = n = tunnel_find_peer (t->paths->me, peer);
1199 while (NULL != parent && MESH_PEER_RELAY == parent->status &&
1200 1 == parent->nchildren)
1203 GNUNET_free (parent->children);
1204 parent = parent->parent;
1208 *n = parent->children[parent->nchildren - 1];
1209 parent->nchildren--;
1210 parent->children = GNUNET_realloc (parent->children, parent->nchildren);
1212 tunnel_mark_peers_disconnected (node);
1219 * Return a newly allocated individual path to reach a peer from the local peer,
1220 * according to the path tree of some tunnel.
1222 * @param t Tunnel from which to read the path tree
1223 * @param peer_info Destination peer to whom we want a path
1225 * @return A newly allocated individual path to reach the destination peer.
1226 * Path must be destroyed afterwards.
1228 static struct MeshPeerPath *
1229 tunnel_get_path_to_peer(struct MeshTunnel *t, struct MeshPeerInfo *peer_info)
1231 struct MeshTunnelPathNode *n;
1232 struct MeshPeerPath *p;
1234 n = tunnel_find_peer(t->paths->me, peer_info);
1235 p = GNUNET_malloc(sizeof(struct MeshPeerPath));
1237 /* Building the path (inverted!) */
1238 while (n->peer->id != myid)
1240 GNUNET_array_append(p->peers, p->length, n->peer->id);
1241 GNUNET_PEER_change_rc(n->peer->id, 1);
1243 GNUNET_assert(NULL != n);
1245 GNUNET_array_append(p->peers, p->length, myid);
1246 GNUNET_PEER_change_rc(myid, 1);
1255 * Integrate a stand alone path into the tunnel tree.
1257 * @param t Tunnel where to add the new path.
1258 * @param p Path to be integrated.
1260 * @return GNUNET_OK in case of success.
1261 * GNUNET_SYSERR in case of error.
1264 * - go backwards on path looking for each peer in the present tree
1267 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1269 struct MeshTunnelPathNode *parent;
1270 struct MeshTunnelPathNode *oldnode;
1271 struct MeshTunnelPathNode *n;
1272 struct GNUNET_PeerIdentity id;
1273 struct GNUNET_PeerIdentity hop;
1279 if (n->peer->id != p->peers[0])
1282 return GNUNET_SYSERR;
1284 /* Ignore return value, if not found it's ok. */
1285 GNUNET_PEER_resolve (p->peers[p->length - 1], &id);
1286 oldnode = tunnel_del_path (t, peer_info_get (&id));
1287 /* Look for the first node that is not already present in the tree
1289 * Assuming that the tree is somewhat balanced, O(log n * log N).
1290 * - Length of the path is expected to be log N (size of whole network).
1291 * - Each level of the tree is expected to have log n children (size of tree).
1293 for (i = 1, me = -1; i < p->length; i++)
1296 if (p->peers[i] == myid)
1298 for (j = 0; j < n->nchildren; j++)
1300 if (n->children[j].peer->id == p->peers[i])
1302 n = &n->children[j];
1306 /* If we couldn't find a child equal to path[i], we have reached the end
1307 * of the common path. */
1313 /* New path deviates from tree before reaching us. What happened? */
1315 return GNUNET_SYSERR;
1317 /* Add the rest of the path as a branch from parent. */
1318 while (i < p->length)
1320 parent->nchildren++;
1321 parent->children = GNUNET_realloc (parent->children, parent->nchildren);
1322 n = &parent->children[parent->nchildren - 1];
1323 if (i == p->length - 1)
1325 if (NULL != oldnode)
1327 /* Assignation and free can be misleading, using explicit mempcy */
1328 memcpy (n, oldnode, sizeof (struct MeshTunnelPathNode));
1329 GNUNET_free (oldnode);
1335 n->status = MESH_PEER_RELAY;
1336 GNUNET_PEER_resolve (p->peers[i], &id);
1337 n->peer = peer_info_get (&id);
1344 /* Add info about first hop into hashmap. */
1345 if (me < p->length - 1)
1347 GNUNET_PEER_resolve (p->peers[p->length - 1], &id);
1348 GNUNET_PEER_resolve (p->peers[me + 1], &hop);
1349 GNUNET_CONTAINER_multihashmap_put (t->paths->first_hops, &id.hashPubKey,
1350 peer_info_get (&hop),
1351 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1358 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1359 * needed rescources.
1361 * @param t Tunnel we want to add a new peer to
1362 * @param peer PeerInfo of the peer being added
1366 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1368 struct MeshPeerPath *p;
1369 struct MeshPeerPath *best_p;
1370 unsigned int best_cost;
1373 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1374 if (NULL == (p = peer->path_head))
1378 best_cost = UINT_MAX;
1381 if ((cost = path_get_cost (t, p)) < best_cost)
1388 tunnel_add_path (t, best_p);
1389 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1390 t->path_refresh_task =
1391 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
1396 * Notify a tunnel that a connection has broken that affects at least
1397 * some of its peers.
1399 * @param t Tunnel affected
1400 * @param peer Peer that (at least) has been affected by the disconnection
1401 * @param p1 Peer that got disconnected from p2
1402 * @param p2 Peer that got disconnected from p1
1407 tunnel_notify_connection_broken (struct MeshTunnel *t,
1408 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1415 * Recursively destory the path tree of a tunnel.
1416 * Note: it does not liberate memory for itself, parent must do it!
1418 * @param n The node to destroy, along with children.
1420 * @return GNUNET_OK on success
1423 tunnel_destroy_tree_node (struct MeshTunnelPathNode *n)
1427 for (i = 0; i < n->nchildren; i++)
1429 tunnel_destroy_tree_node(&n->children[i]);
1431 GNUNET_free (n->children);
1436 * Destroy the tunnel and free any allocated resources linked to it
1438 * @param t the tunnel to destroy
1440 * @return GNUNET_OK on success
1443 tunnel_destroy (struct MeshTunnel *t)
1445 struct MeshClient *c;
1446 struct MeshQueue *q;
1447 struct MeshQueue *qn;
1448 GNUNET_HashCode hash;
1451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DESTROYING TUNNEL at %p\n", t);
1457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1460 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1461 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1466 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1467 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1471 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1475 if (NULL != q->data)
1476 GNUNET_free (q->data);
1480 /* TODO cancel core transmit ready in case it was active */
1483 GNUNET_CONTAINER_multihashmap_destroy(t->paths->first_hops);
1484 tunnel_destroy_tree_node(t->paths->root);
1485 GNUNET_free(t->paths->root);
1486 GNUNET_free (t->paths);
1493 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1494 * client when the client disconnects.
1496 * @param cls closure (client that is disconnecting)
1497 * @param key the hash of the local tunnel id (used to access the hashmap)
1498 * @param value the value stored at the key (tunnel to destroy)
1500 * @return GNUNET_OK on success
1503 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1507 r = tunnel_destroy ((struct MeshTunnel *) value);
1512 /******************************************************************************/
1513 /**************** MESH NETWORK HANDLER HELPERS ***********************/
1514 /******************************************************************************/
1518 * Function called to notify a client about the socket
1519 * being ready to queue more data. "buf" will be
1520 * NULL and "size" zero if the socket was closed for
1521 * writing in the meantime.
1523 * @param cls closure
1524 * @param size number of bytes available in buf
1525 * @param buf where the callee should write the message
1526 * @return number of bytes written to buf
1529 send_core_create_path (void *cls, size_t size, void *buf)
1531 struct MeshPathInfo *info = cls;
1532 struct GNUNET_MESH_ManipulatePath *msg;
1533 struct GNUNET_PeerIdentity *peer_ptr;
1534 struct GNUNET_PeerIdentity id;
1535 struct MeshPeerInfo *peer = info->peer;
1536 struct MeshTunnel *t = info->t;
1537 struct MeshPeerPath *p = info->path;
1542 sizeof (struct GNUNET_MESH_ManipulatePath) +
1543 p->length * sizeof (struct GNUNET_PeerIdentity);
1545 if (size < size_needed || NULL == buf)
1547 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting create path\n");
1548 GNUNET_PEER_resolve (path_get_first_hop (t, peer)->id, &id);
1549 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1550 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1551 size_needed, &send_core_create_path,
1556 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
1557 msg->header.size = htons (size_needed);
1558 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1559 msg->tid = ntohl (t->id.tid);
1561 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1562 for (i = 0; i < p->length; i++)
1564 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1576 * Function called to notify a client about the socket
1577 * being ready to queue more data. "buf" will be
1578 * NULL and "size" zero if the socket was closed for
1579 * writing in the meantime.
1581 * @param cls closure (MeshDataDescriptor with all info to build packet)
1582 * @param size number of bytes available in buf
1583 * @param buf where the callee should write the message
1584 * @return number of bytes written to buf
1587 send_core_data_to_origin (void *cls, size_t size, void *buf)
1589 struct MeshDataDescriptor *info = cls;
1590 struct GNUNET_MESH_ToOrigin *msg = buf;
1593 GNUNET_assert (NULL != info);
1594 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1595 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1597 if (total_size > size)
1599 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1600 "not enough buffer to send data to origin\n");
1603 msg->header.size = htons (total_size);
1604 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1605 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1606 msg->tid = htonl (info->origin->tid);
1607 if (0 != info->size)
1609 memcpy (&msg[1], &info[1], info->size);
1611 if (NULL != info->client)
1613 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1621 * Function called to notify a client about the socket
1622 * being ready to queue more data. "buf" will be
1623 * NULL and "size" zero if the socket was closed for
1624 * writing in the meantime.
1626 * @param cls closure (data itself)
1627 * @param size number of bytes available in buf
1628 * @param buf where the callee should write the message
1629 * @return number of bytes written to buf
1632 send_core_data_unicast (void *cls, size_t size, void *buf)
1634 struct MeshDataDescriptor *info = cls;
1635 struct GNUNET_MESH_Unicast *msg = buf;
1638 GNUNET_assert (NULL != info);
1639 total_size = sizeof (struct GNUNET_MESH_Unicast) + info->size;
1640 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1642 if (total_size > size)
1644 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1645 "not enough buffer to send data to peer\n");
1648 msg->header.size = htons (total_size);
1649 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
1650 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1651 GNUNET_PEER_resolve (info->destination, &msg->destination);
1652 msg->tid = htonl (info->origin->tid);
1653 if (0 != info->size)
1655 memcpy (&msg[1], &info[1], info->size);
1657 if (NULL != info->client)
1659 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1667 * Function called to notify a client about the socket
1668 * being ready to queue more data. "buf" will be
1669 * NULL and "size" zero if the socket was closed for
1670 * writing in the meantime.
1672 * @param cls closure (data itself)
1673 * @param size number of bytes available in buf
1674 * @param buf where the callee should write the message
1675 * @return number of bytes written to buf
1678 send_core_data_multicast (void *cls, size_t size, void *buf)
1680 struct MeshDataDescriptor *info = cls;
1681 struct GNUNET_MESH_Multicast *msg = buf;
1684 GNUNET_assert (NULL != info);
1685 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1686 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1690 info->peer->core_transmit[info->handler_n] = NULL;
1692 if (total_size > size)
1694 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1695 "not enough buffer to send data futher\n");
1698 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1699 msg->header.size = htons (total_size);
1700 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1701 msg->tid = htonl (info->origin->tid);
1702 memcpy (&msg[1], &info[1], total_size);
1703 if (0 == --info->copies)
1705 if (NULL != info->client)
1707 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1716 * Function called to notify a client about the socket
1717 * being ready to queue more data. "buf" will be
1718 * NULL and "size" zero if the socket was closed for
1719 * writing in the meantime.
1721 * @param cls closure (MeshDataDescriptor)
1722 * @param size number of bytes available in buf
1723 * @param buf where the callee should write the message
1724 * @return number of bytes written to buf
1727 send_core_path_ack (void *cls, size_t size, void *buf)
1729 struct MeshDataDescriptor *info = cls;
1730 struct GNUNET_MESH_PathACK *msg = buf;
1732 GNUNET_assert (NULL != info);
1735 info->peer->core_transmit[info->handler_n] = NULL;
1737 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1742 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1743 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1744 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1745 msg->tid = htonl (info->origin->tid);
1746 msg->peer_id = my_full_id;
1748 /* TODO add signature */
1750 return sizeof (struct GNUNET_MESH_PathACK);
1755 * Function called to notify a client about the socket
1756 * being ready to queue more data. "buf" will be
1757 * NULL and "size" zero if the socket was closed for
1758 * writing in the meantime.
1760 * @param cls closure (data itself)
1761 * @param size number of bytes available in buf
1762 * @param buf where the callee should write the message
1763 * @return number of bytes written to buf
1766 send_core_data_raw (void *cls, size_t size, void *buf)
1768 struct GNUNET_MessageHeader *msg = cls;
1771 GNUNET_assert (NULL != msg);
1772 total_size = ntohs (msg->size);
1774 if (total_size > size)
1779 memcpy (buf, msg, total_size);
1787 * Send another peer a notification to destroy a tunnel
1788 * @param cls The tunnel to destroy
1789 * @param size Size in the buffer
1790 * @param buf Memory where to put the data to transmit
1791 * @return Size of data put in buffer
1794 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1796 struct MeshTunnel *t = cls;
1797 struct MeshClient *c;
1798 struct GNUNET_MESH_TunnelMessage *msg;
1802 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1803 /*FIXME*/ msg->header.size =
1804 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1805 msg->tunnel_id = htonl (t->id.tid);
1807 tunnel_destroy (c, t);
1808 return sizeof (struct GNUNET_MESH_TunnelMessage);
1814 * Send the message to all clients that have subscribed to its type
1816 * @param msg Pointer to the message itself
1817 * @return number of clients this message was sent to
1820 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1822 struct MeshClient *c;
1826 type = ntohs (msg->type);
1827 for (count = 0, c = clients; c != NULL; c = c->next)
1829 if (client_is_subscribed (type, c))
1832 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1841 * Iterator over hash map peer entries collect all neighbors who to resend the
1844 * @param cls closure (**GNUNET_PEER_Id to store hops to send packet)
1845 * @param key current key code (peer id hash)
1846 * @param value value in the hash map (peer_info)
1847 * @return GNUNET_YES if we should continue to iterate, GNUNET_NO if not.
1850 iterate_collect_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
1852 struct MeshPeerInfo *peer_info = value;
1853 struct MeshPathInfo *neighbors = cls;
1856 if (peer_info->id == myid)
1860 peer_info = path_get_first_hop (neighbors->t, peer_info);
1861 for (i = 0; i < neighbors->path->length; i++)
1863 if (neighbors->path->peers[i] == peer_info->id)
1866 GNUNET_array_append (neighbors->path->peers, neighbors->path->length,
1873 /******************************************************************************/
1874 /******************** MESH NETWORK HANDLERS **************************/
1875 /******************************************************************************/
1879 * Core handler for path creation
1880 * struct GNUNET_CORE_MessageHandler
1882 * @param cls closure
1883 * @param message message
1884 * @param peer peer identity this notification is about
1885 * @param atsi performance data
1886 * @return GNUNET_OK to keep the connection open,
1887 * GNUNET_SYSERR to close it (signal serious error)
1891 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1892 const struct GNUNET_MessageHeader *message,
1893 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1895 unsigned int own_pos;
1898 MESH_TunnelNumber tid;
1899 struct GNUNET_MESH_ManipulatePath *msg;
1900 struct GNUNET_PeerIdentity *pi;
1901 struct GNUNET_PeerIdentity id;
1902 GNUNET_HashCode hash;
1903 struct MeshPeerPath *path;
1904 struct MeshPeerInfo *dest_peer_info;
1905 struct MeshPeerInfo *orig_peer_info;
1906 struct MeshTunnel *t;
1908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1909 "MESH: Received a MESH path create msg\n");
1910 size = ntohs (message->size);
1911 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1913 GNUNET_break_op (0);
1917 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1918 if (size % sizeof (struct GNUNET_PeerIdentity))
1920 GNUNET_break_op (0);
1923 size /= sizeof (struct GNUNET_PeerIdentity);
1926 GNUNET_break_op (0);
1929 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1931 tid = ntohl (msg->tid);
1932 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1933 t = tunnel_get (pi, tid);
1937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1938 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1939 t->id.oid = GNUNET_PEER_intern (pi);
1941 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1943 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1945 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1946 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1954 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1955 if (NULL == dest_peer_info)
1957 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1958 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1959 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1961 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1963 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1964 if (NULL == orig_peer_info)
1966 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1967 orig_peer_info->id = GNUNET_PEER_intern (pi);
1968 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1969 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1972 path = GNUNET_malloc (sizeof (struct MeshPeerPath));
1973 path->length = size;
1974 path->peers = GNUNET_malloc (size * sizeof (GNUNET_PEER_Id));
1976 for (i = 0; i < size; i++)
1978 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1979 if (path->peers[i] == myid)
1983 { /* cannot be self, must be 'not found' */
1984 /* create path: self not found in path through self */
1985 GNUNET_break_op (0);
1986 path_destroy (path);
1987 /* FIXME error. destroy tunnel? leave for timeout? */
1990 if (own_pos == size - 1)
1992 /* It is for us! Send ack. */
1993 struct MeshDataDescriptor *info;
1996 path_add_to_origin (orig_peer_info, path); /* inverts path! */
1997 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1998 info->origin = &t->id;
1999 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
2000 GNUNET_assert (info->peer);
2001 for (j = 0; info->peer->core_transmit[j]; j++)
2009 info->handler_n = j;
2010 info->peer->core_transmit[j] =
2011 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2012 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2013 sizeof (struct GNUNET_MessageHeader),
2014 &send_core_path_ack, info);
2018 /* It's for somebody else! Retransmit. */
2019 struct MeshPathInfo *path_info;
2021 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2023 path_info->path = path;
2024 path_info->peer = dest_peer_info;
2026 path_add_to_peer (dest_peer_info, path);
2027 GNUNET_PEER_resolve (path->peers[own_pos + 1], &id);
2028 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2029 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2030 sizeof (struct GNUNET_MessageHeader),
2031 &send_core_create_path, path_info);
2038 * Core handler for mesh network traffic going from the origin to a peer
2040 * @param cls closure
2041 * @param peer peer identity this notification is about
2042 * @param message message
2043 * @param atsi performance data
2044 * @return GNUNET_OK to keep the connection open,
2045 * GNUNET_SYSERR to close it (signal serious error)
2048 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2049 const struct GNUNET_MessageHeader *message,
2050 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2052 struct GNUNET_MESH_Unicast *msg;
2053 struct GNUNET_PeerIdentity id;
2054 struct MeshTunnel *t;
2055 struct MeshPeerInfo *pi;
2058 size = ntohs (message->size);
2060 sizeof (struct GNUNET_MESH_Unicast) +
2061 sizeof (struct GNUNET_MessageHeader))
2066 msg = (struct GNUNET_MESH_Unicast *) message;
2067 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2070 /* TODO notify back: we don't know this tunnel */
2073 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2074 &msg->destination.hashPubKey);
2077 /* TODO maybe feedback, log to statistics */
2082 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2085 GNUNET_PEER_resolve (path_get_first_hop (t, pi)->id, &id);
2086 msg = GNUNET_malloc (size);
2087 memcpy (msg, message, size);
2088 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2089 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2090 &send_core_data_raw, msg);
2096 * Core handler for mesh network traffic going from the origin to all peers
2098 * @param cls closure
2099 * @param message message
2100 * @param peer peer identity this notification is about
2101 * @param atsi performance data
2102 * @return GNUNET_OK to keep the connection open,
2103 * GNUNET_SYSERR to close it (signal serious error)
2106 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2107 const struct GNUNET_MessageHeader *message,
2108 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2110 struct GNUNET_MESH_Multicast *msg;
2111 struct GNUNET_PeerIdentity id;
2112 struct MeshDataDescriptor *info;
2113 struct MeshPathInfo neighbors;
2114 struct MeshTunnel *t;
2120 size = ntohs (message->size);
2122 sizeof (struct GNUNET_MESH_Multicast) +
2123 sizeof (struct GNUNET_MessageHeader))
2125 GNUNET_break_op (0);
2128 msg = (struct GNUNET_MESH_Multicast *) message;
2129 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2133 /* TODO notify that we dont know that tunnel */
2137 /* Transmit to locally interested clients */
2138 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2140 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
2143 /* Retransmit to other peers.
2144 * Using path here as just a collection of peers, not a path per se.
2147 neighbors.path = GNUNET_malloc (sizeof (struct MeshPeerPath));
2148 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &iterate_collect_neighbors,
2150 if (0 == neighbors.path->length)
2152 GNUNET_free (neighbors.path);
2155 size -= sizeof (struct GNUNET_MESH_Multicast);
2156 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + size);
2157 info->origin = &t->id;
2158 info->copies = neighbors.path->length;
2159 for (i = 0; i < info->copies; i++)
2161 GNUNET_PEER_resolve (neighbors.path->peers[i], &id);
2162 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
2163 GNUNET_assert (NULL != info->peer);
2164 for (j = 0; 0 != info->peer->core_transmit[j]; j++)
2166 if (j == (CORE_QUEUE_SIZE - 1))
2172 info->handler_n = j;
2173 info->peer->infos[j] = info;
2174 info->peer->core_transmit[j] =
2175 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2176 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2177 ntohs (msg->header.size),
2178 &send_core_data_multicast, info);
2180 GNUNET_free (neighbors.path->peers);
2181 GNUNET_free (neighbors.path);
2187 * Core handler for mesh network traffic
2189 * @param cls closure
2190 * @param message message
2191 * @param peer peer identity this notification is about
2192 * @param atsi performance data
2194 * @return GNUNET_OK to keep the connection open,
2195 * GNUNET_SYSERR to close it (signal serious error)
2198 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2199 const struct GNUNET_MessageHeader *message,
2200 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2202 struct GNUNET_MESH_ToOrigin *msg;
2203 struct GNUNET_PeerIdentity id;
2204 struct MeshPeerInfo *peer_info;
2205 struct MeshTunnel *t;
2208 size = ntohs (message->size);
2209 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2210 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2212 GNUNET_break_op (0);
2215 msg = (struct GNUNET_MESH_ToOrigin *) message;
2216 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2220 /* TODO notify that we dont know this tunnel (whom)? */
2224 if (t->id.oid == myid)
2226 if (NULL == t->client)
2228 /* got data packet for ownerless tunnel */
2229 GNUNET_break_op (0);
2232 /* TODO signature verification */
2233 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
2237 peer_info = peer_info_get (&msg->oid);
2238 if (NULL == peer_info)
2240 /* unknown origin of tunnel */
2244 GNUNET_PEER_resolve (t->paths->me->parent->peer->id, &id);
2245 msg = GNUNET_malloc (size);
2246 memcpy (msg, message, size);
2247 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2248 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
2249 &send_core_data_raw, msg);
2256 * Core handler for path ACKs
2258 * @param cls closure
2259 * @param message message
2260 * @param peer peer identity this notification is about
2261 * @param atsi performance data
2263 * @return GNUNET_OK to keep the connection open,
2264 * GNUNET_SYSERR to close it (signal serious error)
2266 * FIXME path change state
2269 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2270 const struct GNUNET_MessageHeader *message,
2271 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2273 struct GNUNET_MESH_PathACK *msg;
2274 struct GNUNET_PeerIdentity id;
2275 struct MeshTunnel *t;
2276 struct MeshPeerInfo *peer_info;
2278 msg = (struct GNUNET_MESH_PathACK *) message;
2279 t = tunnel_get (&msg->oid, msg->tid);
2282 /* TODO notify that we don't know the tunnel */
2286 /* Message for us? */
2287 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2289 struct GNUNET_MESH_PeerControl pc;
2291 if (NULL == t->client)
2296 peer_info = peer_info_get (&msg->peer_id);
2297 if (NULL == peer_info)
2299 GNUNET_break_op (0);
2302 /* FIXME change state of peer */
2303 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2304 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2305 pc.tunnel_id = htonl (t->local_tid);
2306 GNUNET_PEER_resolve (peer_info->id, &pc.peer);
2307 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
2308 &pc.header, GNUNET_NO);
2312 peer_info = peer_info_get (&msg->oid);
2313 if (NULL == peer_info)
2315 /* If we know the tunnel, we should DEFINITELY know the peer */
2319 GNUNET_PEER_resolve (path_get_first_hop (t, peer_info)->id, &id);
2320 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
2321 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
2322 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2323 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2324 sizeof (struct GNUNET_MESH_PathACK),
2325 &send_core_data_raw, msg);
2331 * Functions to handle messages from core
2333 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2334 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2335 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2336 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2337 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2338 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2339 sizeof (struct GNUNET_MESH_PathACK)},
2345 /******************************************************************************/
2346 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2347 /******************************************************************************/
2350 * deregister_app: iterator for removing each application registered by a client
2352 * @param cls closure
2353 * @param key the hash of the application id (used to access the hashmap)
2354 * @param value the value stored at the key (client)
2356 * @return GNUNET_OK on success
2359 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2361 GNUNET_CONTAINER_multihashmap_remove (applications, key, value);
2367 * notify_client_connection_failure: notify a client that the connection to the
2368 * requested remote peer is not possible (for instance, no route found)
2369 * Function called when the socket is ready to queue more data. "buf" will be
2370 * NULL and "size" zero if the socket was closed for writing in the meantime.
2372 * @param cls closure
2373 * @param size number of bytes available in buf
2374 * @param buf where the callee should write the message
2375 * @return number of bytes written to buf
2378 notify_client_connection_failure (void *cls, size_t size, void *buf)
2381 struct MeshPeerInfo *peer_info;
2382 struct GNUNET_MESH_PeerControl *msg;
2383 struct GNUNET_PeerIdentity id;
2385 if (0 == size && NULL == buf)
2387 // TODO retry? cancel?
2391 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2392 peer_info = (struct MeshPeerInfo *) cls;
2393 msg = (struct GNUNET_MESH_PeerControl *) buf;
2394 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2395 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2396 // msg->tunnel_id = htonl(peer_info->t->tid);
2397 GNUNET_PEER_resolve (peer_info->id, &id);
2398 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2406 * Function to process paths received for a new peer addition. The recorded
2407 * paths form the initial tunnel, which can be optimized later.
2408 * Called on each result obtained for the DHT search.
2410 * @param cls closure
2411 * @param exp when will this value expire
2412 * @param key key of the result
2413 * @param get_path NULL-terminated array of pointers
2414 * to the peers on reverse GET path (or NULL if not recorded)
2415 * @param put_path NULL-terminated array of pointers
2416 * to the peers on the PUT path (or NULL if not recorded)
2417 * @param type type of the result
2418 * @param size number of bytes in data
2419 * @param data pointer to the result data
2424 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2425 const GNUNET_HashCode * key,
2426 const struct GNUNET_PeerIdentity *const *get_path,
2427 const struct GNUNET_PeerIdentity *const *put_path,
2428 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
2430 struct MeshPathInfo *path_info = cls;
2431 struct MeshPeerPath *p;
2432 struct GNUNET_PeerIdentity pi;
2435 if (NULL == get_path || NULL == put_path)
2437 if (NULL == path_info->peer->path_head)
2439 // Find ourselves some alternate initial path to the destination: retry
2440 GNUNET_DHT_get_stop (path_info->peer->dhtget);
2441 GNUNET_PEER_resolve (path_info->peer->id, &pi);
2442 path_info->peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2443 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
2444 GNUNET_BLOCK_TYPE_TEST, /* type */
2445 &pi.hashPubKey, /*key to search */
2446 4, /* replication level */
2447 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2450 0, /* xquery bits */
2452 (void *) path_info);
2457 p = path_build_from_dht (get_path, put_path);
2458 path_add_to_peer (path_info->peer, p);
2459 for (i = 0; i < path_info->peer->ntunnels; i++)
2461 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
2463 GNUNET_free (path_info);
2470 * Function to process paths received for a new peer addition. The recorded
2471 * paths form the initial tunnel, which can be optimized later.
2472 * Called on each result obtained for the DHT search.
2474 * @param cls closure
2475 * @param exp when will this value expire
2476 * @param key key of the result
2477 * @param get_path NULL-terminated array of pointers
2478 * to the peers on reverse GET path (or NULL if not recorded)
2479 * @param put_path NULL-terminated array of pointers
2480 * to the peers on the PUT path (or NULL if not recorded)
2481 * @param type type of the result
2482 * @param size number of bytes in data
2483 * @param data pointer to the result data
2486 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
2487 const GNUNET_HashCode * key,
2488 const struct GNUNET_PeerIdentity *const *get_path,
2489 const struct GNUNET_PeerIdentity *const *put_path,
2490 enum GNUNET_BLOCK_Type type, size_t size,
2493 const struct GNUNET_PeerIdentity *pi = data;
2494 struct GNUNET_PeerIdentity id;
2495 struct MeshTunnel *t = cls;
2496 struct MeshPeerInfo *peer_info;
2497 struct MeshPathInfo *path_info;
2498 struct MeshPeerPath *p;
2501 if (size != sizeof (struct GNUNET_PeerIdentity))
2503 GNUNET_break_op (0);
2506 GNUNET_assert (NULL != t->client);
2507 GNUNET_DHT_get_stop (t->client->dht_get_type);
2508 t->client->dht_get_type = NULL;
2509 peer_info = peer_info_get (pi);
2510 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
2511 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2513 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
2514 NULL == peer_info->dhtget)
2516 /* we don't have a route to the peer, let's try a direct lookup */
2517 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle,
2519 GNUNET_TIME_UNIT_FOREVER_REL,
2521 GNUNET_BLOCK_TYPE_TEST,
2524 /* key to look up */
2526 /* replication level */
2527 GNUNET_DHT_RO_RECORD_ROUTE,
2528 /* option to dht: record route */
2529 NULL, /* bloom filter */
2532 0, /* xquery bits */
2535 peer_info); /* closure */
2538 p = path_build_from_dht (get_path, put_path);
2539 path_add_to_peer (peer_info, p);
2540 tunnel_add_peer(t, peer_info);
2541 p = tunnel_get_path_to_peer(t, peer_info);
2542 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
2544 path_info->peer = peer_info;
2545 path_info->path = p;
2547 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2548 "MESH: new route for tunnel 0x%x found, has %u hops\n",
2549 t->local_tid, p->length);
2550 for (i = 0; i < p->length; i++)
2552 GNUNET_PEER_resolve (p->peers[0], &id);
2553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
2554 GNUNET_h2s_full (&id.hashPubKey));
2558 GNUNET_PEER_resolve (p->peers[1], &id);
2559 GNUNET_CORE_notify_transmit_ready (core_handle,
2565 GNUNET_TIME_UNIT_FOREVER_REL,
2569 sizeof (struct GNUNET_MESH_ManipulatePath)
2572 sizeof (struct GNUNET_PeerIdentity)),
2574 &send_core_create_path,
2576 path_info); /* cls */
2579 /******************************************************************************/
2580 /********************* MESH LOCAL HANDLES **************************/
2581 /******************************************************************************/
2585 * Handler for client disconnection
2587 * @param cls closure
2588 * @param client identification of the client; NULL
2589 * for the last call when the server is destroyed
2592 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2594 struct MeshClient *c;
2595 struct MeshClient *next;
2597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2599 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
2603 if (c->handle != client && NULL != client)
2605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2610 if (NULL != c->tunnels)
2612 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2613 &tunnel_destroy_iterator,
2615 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2618 /* deregister clients applications */
2619 if (NULL != c->apps)
2621 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
2622 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
2624 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
2625 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2627 GNUNET_SCHEDULER_cancel (announce_applications_task);
2628 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2630 if (NULL != c->types)
2631 GNUNET_CONTAINER_multihashmap_destroy (c->types);
2632 if (NULL != c->dht_get_type)
2633 GNUNET_DHT_get_stop (c->dht_get_type);
2634 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2646 * Handler for new clients
2648 * @param cls closure
2649 * @param client identification of the client
2650 * @param message the actual message, which includes messages the client wants
2653 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2654 const struct GNUNET_MessageHeader *message)
2656 struct GNUNET_MESH_ClientConnect *cc_msg;
2657 struct MeshClient *c;
2658 GNUNET_MESH_ApplicationType *a;
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2666 /* Check data sanity */
2667 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2668 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2669 ntypes = ntohs (cc_msg->types);
2670 napps = ntohs (cc_msg->applications);
2672 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2675 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2679 /* Create new client structure */
2680 c = GNUNET_malloc (sizeof (struct MeshClient));
2682 c->id = next_client_id++;
2685 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2688 GNUNET_MESH_ApplicationType at;
2691 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
2692 for (i = 0; i < napps; i++)
2695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
2696 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
2697 /* store in clients hashmap */
2698 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
2699 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2700 /* store in global hashmap, for announcements */
2701 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
2702 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2704 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2705 announce_applications_task =
2706 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
2714 t = (uint16_t *) & a[napps];
2715 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
2716 for (i = 0; i < ntypes; i++)
2719 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
2721 /* store in clients hashmap */
2722 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
2723 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2724 /* store in global hashmap */
2725 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
2726 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2729 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2730 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2732 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2733 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2734 GNUNET_SERVER_notification_context_add (nc, client);
2736 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
2744 * Handler for requests of new tunnels
2746 * @param cls closure
2747 * @param client identification of the client
2748 * @param message the actual message
2751 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2752 const struct GNUNET_MessageHeader *message)
2754 struct GNUNET_MESH_TunnelMessage *t_msg;
2755 struct MeshTunnel *t;
2756 struct MeshClient *c;
2757 GNUNET_HashCode hash;
2759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2761 /* Sanity check for client registration */
2762 if (NULL == (c = client_get (client)))
2765 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2772 /* Message sanity check */
2773 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2776 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2780 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2781 /* Sanity check for tunnel numbering */
2782 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2785 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2788 /* Sanity check for duplicate tunnel IDs */
2789 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
2792 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2796 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
2798 while (NULL != tunnel_get_by_pi (myid, next_tid))
2799 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2800 t->id.tid = next_tid++;
2802 t->local_tid = ntohl (t_msg->tunnel_id);
2804 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2806 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2808 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2809 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2812 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2816 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2818 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2819 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2822 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2825 t->paths = GNUNET_malloc (sizeof(struct MeshTunnelPath));
2826 t->paths->first_hops = GNUNET_CONTAINER_multihashmap_create(32);
2828 t->paths->root = GNUNET_malloc(sizeof(struct MeshTunnelPathNode));
2829 t->paths->root->status = MESH_PEER_READY;
2830 t->paths->root->t = t;
2831 t->paths->root->peer = peer_info_get(&my_full_id);
2832 t->paths->me = t->paths->root;
2834 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2840 * Handler for requests of deleting tunnels
2842 * @param cls closure
2843 * @param client identification of the client
2844 * @param message the actual message
2847 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2848 const struct GNUNET_MessageHeader *message)
2850 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2851 struct MeshClient *c;
2852 struct MeshTunnel *t;
2853 MESH_TunnelNumber tid;
2854 GNUNET_HashCode hash;
2856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2858 /* Sanity check for client registration */
2859 if (NULL == (c = client_get (client)))
2862 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2865 /* Message sanity check */
2866 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2869 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2875 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2877 /* Retrieve tunnel */
2878 tid = ntohl (tunnel_msg->tunnel_id);
2880 /* Remove from local id hashmap */
2881 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2882 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2883 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2885 /* Remove from global id hashmap */
2886 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2887 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2889 // notify_tunnel_destroy(t); FIXME
2891 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2897 * Handler for connection requests to new peers
2899 * @param cls closure
2900 * @param client identification of the client
2901 * @param message the actual message (PeerControl)
2906 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2907 const struct GNUNET_MessageHeader *message)
2909 struct GNUNET_MESH_PeerControl *peer_msg;
2910 struct MeshClient *c;
2911 struct MeshTunnel *t;
2912 MESH_TunnelNumber tid;
2913 struct MeshPeerInfo *peer_info;
2916 /* Sanity check for client registration */
2917 if (NULL == (c = client_get (client)))
2920 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2924 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2925 /* Sanity check for message size */
2926 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2929 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2933 /* Tunnel exists? */
2934 tid = ntohl (peer_msg->tunnel_id);
2935 t = tunnel_get_by_local_id (c, tid);
2939 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2943 /* Does client own tunnel? */
2944 if (t->client->handle != client)
2947 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2952 peer_info = peer_info_get (&peer_msg->peer);
2954 /* Start DHT search if needed FIXME: if not already connected */
2955 if (NULL == peer_info->dhtget)
2957 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 */
2958 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2961 0, /* xquery bits */
2963 (void *) peer_info);
2966 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2972 * Handler for disconnection requests of peers in a tunnel
2974 * @param cls closure
2975 * @param client identification of the client
2976 * @param message the actual message (PeerControl)
2979 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2980 const struct GNUNET_MessageHeader *message)
2982 struct GNUNET_MESH_PeerControl *peer_msg;
2983 struct MeshClient *c;
2984 struct MeshTunnel *t;
2985 MESH_TunnelNumber tid;
2987 /* Sanity check for client registration */
2988 if (NULL == (c = client_get (client)))
2991 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2994 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2995 /* Sanity check for message size */
2996 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2999 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3003 /* Tunnel exists? */
3004 tid = ntohl (peer_msg->tunnel_id);
3005 t = tunnel_get_by_local_id (c, tid);
3009 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3013 /* Does client own tunnel? */
3014 if (t->client->handle != client)
3017 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3021 /* Ok, delete peer from tunnel */
3022 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3023 &peer_msg->peer.hashPubKey);
3025 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3031 * Handler for connection requests to new peers by type
3033 * @param cls closure
3034 * @param client identification of the client
3035 * @param message the actual message (ConnectPeerByType)
3038 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3039 const struct GNUNET_MessageHeader *message)
3041 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3042 struct MeshClient *c;
3043 struct MeshTunnel *t;
3044 GNUNET_HashCode hash;
3045 GNUNET_MESH_ApplicationType type;
3046 MESH_TunnelNumber tid;
3048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3049 /* Sanity check for client registration */
3050 if (NULL == (c = client_get (client)))
3053 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3057 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3058 /* Sanity check for message size */
3059 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3060 ntohs (connect_msg->header.size))
3063 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3067 /* Tunnel exists? */
3068 tid = ntohl (connect_msg->tunnel_id);
3069 t = tunnel_get_by_local_id (c, tid);
3073 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3077 /* Does client own tunnel? */
3078 if (t->client->handle != client)
3081 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3085 /* Do WE have the service? */
3086 type = ntohl (connect_msg->type);
3087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", type);
3088 GNUNET_CRYPTO_hash (&type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3089 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3092 /* Yes! Fast forward, add ourselves to the tunnel and send the
3093 * good news to the client
3095 struct GNUNET_MESH_PeerControl pc;
3097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3098 pc.peer = my_full_id;
3099 GNUNET_CONTAINER_multihashmap_put (t->peers, &pc.peer.hashPubKey,
3100 peer_info_get (&pc.peer),
3101 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3102 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3103 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
3104 pc.tunnel_id = htonl (t->local_tid);
3105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3106 GNUNET_SERVER_notification_context_unicast (nc, /* context */
3108 &pc.header, /* msg */
3109 GNUNET_NO); /* can drop? */
3110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3111 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3114 /* Ok, lets find a peer offering the service */
3115 if (c->dht_get_type)
3117 GNUNET_DHT_get_stop (c->dht_get_type);
3119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3120 GNUNET_h2s_full (&hash));
3122 GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
3123 GNUNET_BLOCK_TYPE_TEST, &hash, 10U,
3124 GNUNET_DHT_RO_RECORD_ROUTE, NULL, 0, NULL, 0,
3125 &dht_get_type_handler, t);
3127 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3133 * Handler for client traffic directed to one peer
3135 * @param cls closure
3136 * @param client identification of the client
3137 * @param message the actual message
3140 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3141 const struct GNUNET_MessageHeader *message)
3143 struct MeshClient *c;
3144 struct MeshTunnel *t;
3145 struct MeshPeerInfo *pi;
3146 struct GNUNET_MESH_Unicast *data_msg;
3147 struct GNUNET_PeerIdentity next_hop;
3148 struct MeshDataDescriptor *info;
3149 MESH_TunnelNumber tid;
3152 /* Sanity check for client registration */
3153 if (NULL == (c = client_get (client)))
3156 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3159 data_msg = (struct GNUNET_MESH_Unicast *) message;
3160 /* Sanity check for message size */
3161 if (sizeof (struct GNUNET_MESH_Unicast) +
3162 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
3165 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3169 /* Tunnel exists? */
3170 tid = ntohl (data_msg->tid);
3171 t = tunnel_get_by_local_id (c, tid);
3175 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3179 /* Is it a local tunnel? Then, does client own the tunnel? */
3180 if (t->client->handle != NULL && t->client->handle != client)
3183 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3187 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3188 &data_msg->destination.hashPubKey);
3189 /* Is the selected peer in the tunnel? */
3193 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3198 struct GNUNET_MESH_Unicast copy;
3200 /* Work around const limitation */
3201 memcpy (©, data_msg, sizeof (struct GNUNET_MESH_Unicast));
3202 copy.oid = my_full_id;
3203 copy.tid = htonl (t->id.tid);
3204 handle_mesh_data_unicast (NULL, &my_full_id, ©.header, NULL);
3207 GNUNET_PEER_resolve (path_get_first_hop (t, pi)->id, &next_hop);
3208 data_size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Unicast);
3209 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + data_size);
3210 memcpy (&info[1], &data_msg[1], data_size);
3211 info->destination = pi->id;
3212 info->origin = &t->id;
3213 info->size = data_size;
3214 info->client = client;
3215 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
3216 GNUNET_TIME_UNIT_FOREVER_REL, &next_hop,
3217 /* FIXME re-check types */
3219 sizeof (struct GNUNET_MESH_Unicast),
3220 &send_core_data_unicast, info);
3225 * Handler for client traffic directed to all peers in a tunnel
3227 * @param cls closure
3228 * @param client identification of the client
3229 * @param message the actual message
3232 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3233 const struct GNUNET_MessageHeader *message)
3235 struct MeshClient *c;
3236 struct MeshTunnel *t;
3237 struct GNUNET_MESH_Multicast *data_msg;
3238 MESH_TunnelNumber tid;
3240 /* Sanity check for client registration */
3241 if (NULL == (c = client_get (client)))
3244 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3247 data_msg = (struct GNUNET_MESH_Multicast *) message;
3248 /* Sanity check for message size */
3249 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
3252 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3256 /* Tunnel exists? */
3257 tid = ntohl (data_msg->tid);
3258 t = tunnel_get_by_local_id (c, tid);
3262 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3266 /* Does client own tunnel? */
3267 if (t->client->handle != client)
3270 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3276 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3281 * Functions to handle messages from clients
3283 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3284 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3285 {&handle_local_tunnel_create, NULL,
3286 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3287 sizeof (struct GNUNET_MESH_TunnelMessage)},
3288 {&handle_local_tunnel_destroy, NULL,
3289 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3290 sizeof (struct GNUNET_MESH_TunnelMessage)},
3291 {&handle_local_connect_add, NULL,
3292 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3293 sizeof (struct GNUNET_MESH_PeerControl)},
3294 {&handle_local_connect_del, NULL,
3295 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3296 sizeof (struct GNUNET_MESH_PeerControl)},
3297 {&handle_local_connect_by_type, NULL,
3298 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3299 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3300 {&handle_local_unicast, NULL,
3301 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3302 {&handle_local_unicast, NULL,
3303 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3304 {&handle_local_multicast, NULL,
3305 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3311 * To be called on core init/fail.
3313 * @param cls service closure
3314 * @param server handle to the server for this service
3315 * @param identity the public identity of this peer
3316 * @param publicKey the public key of this peer
3319 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3320 const struct GNUNET_PeerIdentity *identity,
3321 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
3323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3324 core_handle = server;
3325 my_full_id = *identity;
3326 myid = GNUNET_PEER_intern (identity);
3327 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
3332 * Method called whenever a given peer connects.
3334 * @param cls closure
3335 * @param peer peer identity this notification is about
3336 * @param atsi performance data for the connection
3339 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3340 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
3342 // GNUNET_PEER_Id pid;
3343 struct MeshPeerInfo *peer_info;
3344 struct MeshPeerPath *path;
3346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3347 peer_info = peer_info_get (peer);
3348 if (myid == peer_info->id)
3350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3352 path = GNUNET_malloc (sizeof (struct MeshPeerPath));
3354 path->peers = GNUNET_malloc (sizeof (GNUNET_PEER_Id) * 2);
3355 path->peers[0] = myid;
3356 path->peers[1] = peer_info->id;
3357 path_add_to_peer (peer_info, path);
3362 * Method called whenever a peer disconnects.
3364 * @param cls closure
3365 * @param peer peer identity this notification is about
3368 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
3370 struct MeshPeerInfo *pi;
3373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
3374 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
3380 for (i = 0; i < CORE_QUEUE_SIZE; i++)
3382 if (pi->core_transmit[i])
3384 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
3385 /* TODO: notify that tranmission has failed */
3386 GNUNET_free (pi->infos[i]);
3389 path_remove_from_peer (pi, pi->id, myid);
3392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
3398 /******************************************************************************/
3399 /************************ MAIN FUNCTIONS ****************************/
3400 /******************************************************************************/
3403 * Task run during shutdown.
3409 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3411 struct MeshClient *c;
3413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
3414 if (core_handle != NULL)
3416 GNUNET_CORE_disconnect (core_handle);
3419 if (dht_handle != NULL)
3421 for (c = clients; NULL != c; c = c->next)
3422 if (NULL != c->dht_get_type)
3423 GNUNET_DHT_get_stop (c->dht_get_type);
3424 GNUNET_DHT_disconnect (dht_handle);
3429 GNUNET_SERVER_notification_context_destroy (nc);
3432 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
3434 GNUNET_SCHEDULER_cancel (announce_id_task);
3435 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
3437 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
3441 * Process mesh requests.
3443 * @param cls closure
3444 * @param server the initialized server
3445 * @param c configuration to use
3448 run (void *cls, struct GNUNET_SERVER_Handle *server,
3449 const struct GNUNET_CONFIGURATION_Handle *c)
3451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
3452 GNUNET_SERVER_add_handlers (server, client_handlers);
3453 GNUNET_SERVER_disconnect_notify (server,
3454 &handle_local_client_disconnect,
3456 server_handle = server;
3457 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
3458 CORE_QUEUE_SIZE, /* queue size */
3459 NULL, /* Closure passed to MESH functions */
3460 &core_init, /* Call core_init once connected */
3461 &core_connect, /* Handle connects */
3462 &core_disconnect, /* remove peers on disconnects */
3463 NULL, /* Do we care about "status" updates? */
3464 NULL, /* Don't notify about all incoming messages */
3465 GNUNET_NO, /* For header only in notification */
3466 NULL, /* Don't notify about all outbound messages */
3467 GNUNET_NO, /* For header-only out notification */
3468 core_handlers); /* Register these handlers */
3469 if (core_handle == NULL)
3473 dht_handle = GNUNET_DHT_connect (c, 64);
3474 if (dht_handle == NULL)
3476 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Error connecting to DHT.\
3477 Running without DHT has a severe\
3478 impact in MESH capabilities.\n\
3479 Plase check your configuretion and enable DHT.\n");
3485 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3486 peers = GNUNET_CONTAINER_multihashmap_create (32);
3487 applications = GNUNET_CONTAINER_multihashmap_create (32);
3488 types = GNUNET_CONTAINER_multihashmap_create (32);
3489 nc = GNUNET_SERVER_notification_context_create (server_handle,
3492 clients_tail = NULL;
3497 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3499 /* Scheduled the task to clean up when shutdown is called */
3500 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
3503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
3507 * The main function for the mesh service.
3509 * @param argc number of arguments from the command line
3510 * @param argv command line arguments
3511 * @return 0 ok, 1 on error
3514 main (int argc, char *const *argv)
3518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
3521 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
3523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");