2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - add connection confirmation message
44 * - handle trnsmt_rdy return values
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,\
95 /******************************************************************************/
96 /************************ DATA STRUCTURES ****************************/
97 /******************************************************************************/
100 * Information regarding a path
108 struct MeshPath *next;
109 struct MeshPath *prev;
112 * Whether the path is serving traffic in a tunnel or is a backup
117 * List of all the peers that form the path from origin to target
119 GNUNET_PEER_Id *peers;
122 * Number of peers (hops) in the path
129 * All the states a peer participating in a tunnel can be in.
134 * Path to the peer not known yet
139 * Request sent, not yet answered.
144 * Peer connected and ready to accept data
149 * Peer connected previosly but not responding
151 MESH_PEER_RECONNECTING
155 /** FWD declaration */
159 * Struct containing all info possibly needed to build a package when called
162 struct MeshDataDescriptor
164 /** ID of the tunnel this packet travels in */
165 struct MESH_TunnelID *origin;
167 /** Ultimate destination of the packet */
168 GNUNET_PEER_Id destination;
170 /** Number of identical messages sent to different hops (multicast) */
173 /** Size of the data */
176 /** Client that asked for the transmission, if any */
177 struct GNUNET_SERVER_Client *client;
179 /** Who was is message being sent to */
180 struct MeshPeerInfo *peer;
182 /** Which handler was used to request the transmission */
183 unsigned int handler_n;
185 /* Data at the end */
190 * Struct containing all information regarding a given peer
200 * Is the peer reachable? Is the peer even connected?
202 enum MeshPeerState state;
205 * Last time we heard from this peer
207 struct GNUNET_TIME_Absolute last_contact;
210 * Number of attempts to reconnect so far
212 int n_reconnect_attempts;
215 * Paths to reach the peer
217 struct MeshPath *path;
218 struct MeshPath *path_tail;
221 * Handle to stop the DHT search for a path to this peer
223 struct GNUNET_DHT_GetHandle *dhtget;
226 * Handles to stop queued transmissions for this peer
228 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
231 * Pointer to info stuctures used as cls for queued transmissions
233 struct MeshDataDescriptor *infos[CORE_QUEUE_SIZE];
236 * Task to send keepalive packets over the current active path
238 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
243 * Data scheduled to transmit (to local client or remote peer)
250 struct MeshQueue *next;
251 struct MeshQueue *prev;
254 * Target of the data (NULL if target is client)
256 struct MeshPeerInfo *peer;
259 * Client to send the data to (NULL if target is peer)
261 struct MeshClient *client;
264 * Size of the message to transmit
269 * How old is the data?
271 struct GNUNET_TIME_Absolute timestamp;
276 struct GNUNET_MessageHeader *data;
280 * Globally unique tunnel identification (owner + number)
281 * DO NOT USE OVER THE NETWORK
286 * Node that owns the tunnel
291 * Tunnel number to differentiate all the tunnels owned by the node oid
292 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
294 MESH_TunnelNumber tid;
298 struct MeshClient; /* FWD declaration */
301 * Struct containing all information regarding a tunnel
302 * For an intermediate node the improtant info used will be:
303 * - id Tunnel unique identification
304 * - paths[0] To know where to send it next
305 * - metainfo: ready, speeds, accounting
312 struct MESH_TunnelID id;
315 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
317 MESH_TunnelNumber local_tid;
320 * Last time the tunnel was used
322 struct GNUNET_TIME_Absolute timestamp;
325 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
327 struct GNUNET_CONTAINER_MultiHashMap *peers;
330 * Number of peers that are connected and potentially ready to receive data
332 unsigned int peers_ready;
335 * Number of peers that have been added to the tunnel
337 unsigned int peers_total;
341 * Client owner of the tunnel, if any
343 struct MeshClient *client;
346 * Messages ready to transmit
348 struct MeshQueue *queue_head;
349 struct MeshQueue *queue_tail;
354 * Struct containing information about a client of the service
361 struct MeshClient *next;
362 struct MeshClient *prev;
365 * Tunnels that belong to this client, indexed by local id
367 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
370 * Handle to communicate with the client
372 struct GNUNET_SERVER_Client *handle;
375 * Applications that this client has claimed to provide
377 struct GNUNET_CONTAINER_MultiHashMap *apps;
380 * Messages that this client has declared interest in
382 struct GNUNET_CONTAINER_MultiHashMap *types;
385 * Used for seachching peers offering a service
387 struct GNUNET_DHT_GetHandle *dht_get_type;
391 /******************************************************************************/
392 /*********************** GLOBAL VARIABLES ****************************/
393 /******************************************************************************/
398 static struct MeshClient *clients;
399 static struct MeshClient *clients_tail;
402 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
404 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
407 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
409 static struct GNUNET_CONTAINER_MultiHashMap *peers;
412 * Handle to communicate with core
414 static struct GNUNET_CORE_Handle *core_handle;
419 static struct GNUNET_DHT_Handle *dht_handle;
424 static struct GNUNET_SERVER_Handle *server_handle;
427 * Notification context, to send messages to local clients
429 static struct GNUNET_SERVER_NotificationContext *nc;
432 * Local peer own ID (memory efficient handle)
434 static GNUNET_PEER_Id myid;
437 * Local peer own ID (full value)
439 static struct GNUNET_PeerIdentity my_full_id;
442 * Tunnel ID for the next created tunnel (global tunnel number)
444 static MESH_TunnelNumber next_tid;
447 * All application types provided by this peer
449 static struct GNUNET_CONTAINER_MultiHashMap *applications;
452 * All message types clients of this peer are interested in
454 static struct GNUNET_CONTAINER_MultiHashMap *types;
457 * Task to periodically announce provided applications
459 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
462 * Task to periodically announce itself in the network
464 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
467 /******************************************************************************/
468 /****************** GENERAL HELPER FUNCTIONS ************************/
469 /******************************************************************************/
472 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
473 * and inster it in the appropiate structures if the peer is not known yet.
474 * @param peer Identity of the peer
475 * @return Existing or newly created peer info
477 static struct MeshPeerInfo *
478 get_peer_info (const struct GNUNET_PeerIdentity *peer)
480 struct MeshPeerInfo *peer_info;
482 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
483 if (NULL == peer_info)
486 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
487 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
488 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
489 peer_info->id = GNUNET_PEER_intern (peer);
490 peer_info->state = MESH_PEER_SEARCHING;
497 * Find the first peer whom to send a packet to go down this path
498 * @param path The path to use
499 * @return short id of the next peer, myid in case of local delivery,
500 * or 0 in case of error
502 static GNUNET_PEER_Id
503 get_first_hop (struct MeshPath *path)
515 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
516 "tried to get the next hop from an invalid path\n");
520 for (i = 0; i < path->length; i++)
522 if (path->peers[i] == myid)
524 if (i < path->length - 1)
526 return path->peers[i + 1];
539 * Get the cost of the path.
540 * @param path The path to analyze
541 * @return Number of hops to reach destination, UINT_MAX in case the peer is not
545 get_path_cost (struct MeshPath *path)
551 for (i = 0; i < path->length; i++)
553 if (path->peers[i] == myid)
555 return path->length - i;
563 * Add the path to the peer and update the path used to reach it in case this
565 * @param peer_info Destination peer to add the path to.
566 * @param path New path to add. Last peer must be the peer in arg 1.
569 add_path_to_peer (struct MeshPeerInfo *peer_info, struct MeshPath *path)
572 unsigned int new_cost;
573 unsigned int best_cost;
574 struct MeshPath *aux;
575 struct MeshPath *best;
577 if (NULL == peer_info || NULL == path)
580 new_cost = get_path_cost (path);
581 best_cost = UINT_MAX;
583 for (aux = peer_info->path; aux != NULL; aux = aux->next)
585 if ((i = get_path_cost (aux)) < best_cost)
591 if (best_cost < new_cost)
594 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path, peer_info->path_tail,
602 GNUNET_CONTAINER_DLL_insert (peer_info->path, peer_info->path_tail, path);
609 * Add the path to the peer and update the path used to reach it in case this
610 * is the shortest. The path is given in reverse, the destination peer is
611 * path[0]. The function modifies the path, inverting it to use the origin as
613 * @param peer_info Destination peer to add the path to.
614 * @param path New path to add. First peer must be the peer in arg 1.
617 add_path_to_origin (struct MeshPeerInfo *peer_info, struct MeshPath *path)
622 for (i = 0; i < path->length / 2; i++)
624 aux = path->peers[i];
625 path->peers[i] = path->peers[path->length - i - 1];
626 path->peers[path->length - i - 1] = aux;
628 add_path_to_peer (peer_info, path);
633 * Check if client has registered with the service and has not disconnected
634 * @param client the client to check
635 * @return non-NULL if client exists in the global DLL
637 static struct MeshClient *
638 retrieve_client (struct GNUNET_SERVER_Client *client)
640 struct MeshClient *c;
645 if (c->handle == client)
654 * Checks if a given client has subscribed to certain message type
655 * @param message_type Type of message to check
656 * @param c Client to check
657 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
659 static int /* FIXME inline? */
660 is_client_subscribed (uint16_t message_type, struct MeshClient *c)
664 GNUNET_CRYPTO_hash(&message_type, sizeof(uint16_t), &hc);
665 return GNUNET_CONTAINER_multihashmap_contains(c->types, &hc);
670 * Search for a tunnel among the tunnels for a client
671 * @param c the client whose tunnels to search in
672 * @param tid the local id of the tunnel
673 * @return tunnel handler, NULL if doesn't exist
675 static struct MeshTunnel *
676 retrieve_tunnel_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
678 GNUNET_HashCode hash;
680 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
681 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
685 * Search for a tunnel by global ID using PEER_ID
686 * @param pi owner of the tunnel
687 * @param tid global tunnel number
688 * @return tunnel handler, NULL if doesn't exist
690 static struct MeshTunnel *
691 retrieve_tunnel_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
693 struct MESH_TunnelID id;
694 GNUNET_HashCode hash;
699 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
700 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
706 * Search for a tunnel by global ID using full PeerIdentities
707 * @param oid owner of the tunnel
708 * @param tid global tunnel number
709 * @return tunnel handler, NULL if doesn't exist
711 static struct MeshTunnel *
712 retrieve_tunnel (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
714 return retrieve_tunnel_by_pi (GNUNET_PEER_search (oid), tid);
719 * Destroy the path and free any allocated resources linked to it
720 * @param p the path to destroy
721 * @return GNUNET_OK on success
724 destroy_path (struct MeshPath *p)
726 GNUNET_PEER_decrement_rcs (p->peers, p->length);
727 GNUNET_free (p->peers);
734 * Destroy the peer_info and free any allocated resources linked to it
735 * @param t tunnel the path belongs to
736 * @param pi the peer_info to destroy
737 * @return GNUNET_OK on success
740 destroy_peer_info (struct MeshPeerInfo *pi)
742 GNUNET_HashCode hash;
743 struct GNUNET_PeerIdentity id;
745 GNUNET_PEER_resolve (pi->id, &id);
746 GNUNET_PEER_change_rc (pi->id, -1);
747 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
749 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
750 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
758 * Destroy the tunnel and free any allocated resources linked to it
759 * @param t the tunnel to destroy
760 * @return GNUNET_OK on success
763 destroy_tunnel (struct MeshTunnel *t)
765 struct MeshClient *c;
767 struct MeshQueue *qn;
768 GNUNET_HashCode hash;
776 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
777 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
782 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
783 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
787 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
792 GNUNET_free (q->data);
796 /* TODO cancel core transmit ready in case it was active */
802 /******************************************************************************/
803 /************************ PERIODIC FUNCTIONS ****************************/
804 /******************************************************************************/
807 * Announce iterator over for each application provided by the peer
810 * @param key current key code
811 * @param value value in the hash map
812 * @return GNUNET_YES if we should continue to
817 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
819 /* FIXME are hashes in multihash map equal on all aquitectures? */
820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
821 "MESH: putting in DHT %s\n",
822 GNUNET_h2s_full(key));
823 GNUNET_DHT_put (dht_handle, key, 10U, GNUNET_DHT_RO_RECORD_ROUTE,
824 GNUNET_BLOCK_TYPE_TEST, sizeof (struct GNUNET_PeerIdentity),
825 (const char *) &my_full_id,
826 // GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
827 // APP_ANNOUNCE_TIME), FIXME
828 // APP_ANNOUNCE_TIME,
829 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
831 &mesh_debug, "DHT_put for app completed");
840 * Periodically announce what applications are provided by local clients
843 * @param tc task context
846 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
848 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
850 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
854 GNUNET_CONTAINER_multihashmap_iterate(applications,
855 &announce_application,
857 announce_applications_task =
858 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
860 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
866 * Periodically announce self id in the DHT
869 * @param tc task context
872 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
874 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
876 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
880 * - Set data expiration in function of X
883 GNUNET_DHT_put (dht_handle, /* DHT handle */
884 &my_full_id.hashPubKey, /* Key to use */
885 10U, /* Replication level */
886 GNUNET_DHT_RO_RECORD_ROUTE, /* DHT options */
887 GNUNET_BLOCK_TYPE_TEST, /* Block type */
888 0, /* Size of the data */
889 NULL, /* Data itself */
890 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
891 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
893 &mesh_debug, "DHT_put for id completed");
895 NULL, /* Continuation */
896 NULL); /* Continuation closure */
899 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
902 /******************************************************************************/
903 /**************** MESH NETWORK HANDLER HELPERS ***********************/
904 /******************************************************************************/
907 * Function called to notify a client about the socket
908 * being ready to queue more data. "buf" will be
909 * NULL and "size" zero if the socket was closed for
910 * writing in the meantime.
913 * @param size number of bytes available in buf
914 * @param buf where the callee should write the message
915 * @return number of bytes written to buf
918 send_core_create_path_for_peer (void *cls, size_t size, void *buf)
920 struct MeshPeerInfo *peer_info = cls;
921 struct GNUNET_MESH_ManipulatePath *msg;
923 struct GNUNET_PeerIdentity *peer_ptr;
924 struct GNUNET_PeerIdentity id;
928 if (0 == size && NULL == buf)
930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting create path\n");
931 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
932 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
933 GNUNET_TIME_UNIT_FOREVER_REL, &id,
935 GNUNET_MESH_ManipulatePath) +
936 (peer_info->path->length *
937 sizeof (struct GNUNET_PeerIdentity)),
938 &send_core_create_path_for_peer,
952 return 0; // TODO Notify ERROR Path not found
955 sizeof (struct GNUNET_MESH_ManipulatePath) +
956 p->length * sizeof (struct GNUNET_PeerIdentity);
957 if (size < size_needed)
959 // TODO retry? cancel?
963 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
964 msg->header.size = htons (size_needed);
965 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
967 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
968 for (i = 0; i < p->length; i++)
970 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
973 peer_info->state = MESH_PEER_WAITING;
981 * Function called to notify a client about the socket
982 * being ready to queue more data. "buf" will be
983 * NULL and "size" zero if the socket was closed for
984 * writing in the meantime.
986 * @param cls closure (MeshDataDescriptor with all info to build packet)
987 * @param size number of bytes available in buf
988 * @param buf where the callee should write the message
989 * @return number of bytes written to buf
992 send_core_data_to_origin (void *cls, size_t size, void *buf)
994 struct MeshDataDescriptor *info = cls;
995 struct GNUNET_MESH_ToOrigin *msg = buf;
998 GNUNET_assert (NULL != info);
999 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
1000 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1002 if (total_size > size)
1004 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1005 "not enough buffer to send data to origin\n");
1008 msg->header.size = htons (total_size);
1009 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1010 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1011 msg->tid = htonl (info->origin->tid);
1012 if (0 != info->size)
1014 memcpy (&msg[1], &info[1], info->size);
1016 if (NULL != info->client)
1018 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1026 * Function called to notify a client about the socket
1027 * being ready to queue more data. "buf" will be
1028 * NULL and "size" zero if the socket was closed for
1029 * writing in the meantime.
1031 * @param cls closure (data itself)
1032 * @param size number of bytes available in buf
1033 * @param buf where the callee should write the message
1034 * @return number of bytes written to buf
1037 send_core_data_unicast (void *cls, size_t size, void *buf)
1039 struct MeshDataDescriptor *info = cls;
1040 struct GNUNET_MESH_Unicast *msg = buf;
1043 GNUNET_assert (NULL != info);
1044 total_size = sizeof (struct GNUNET_MESH_Unicast) + info->size;
1045 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1047 if (total_size > size)
1049 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1050 "not enough buffer to send data to peer\n");
1053 msg->header.size = htons (total_size);
1054 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
1055 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1056 GNUNET_PEER_resolve (info->destination, &msg->destination);
1057 msg->tid = htonl (info->origin->tid);
1058 if (0 != info->size)
1060 memcpy (&msg[1], &info[1], info->size);
1062 if (NULL != info->client)
1064 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1072 * Function called to notify a client about the socket
1073 * being ready to queue more data. "buf" will be
1074 * NULL and "size" zero if the socket was closed for
1075 * writing in the meantime.
1077 * @param cls closure (data itself)
1078 * @param size number of bytes available in buf
1079 * @param buf where the callee should write the message
1080 * @return number of bytes written to buf
1083 send_core_data_multicast (void *cls, size_t size, void *buf)
1085 struct MeshDataDescriptor *info = cls;
1086 struct GNUNET_MESH_Multicast *msg = buf;
1089 GNUNET_assert (NULL != info);
1090 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1091 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1095 info->peer->core_transmit[info->handler_n] = NULL;
1097 if (total_size > size)
1099 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1100 "not enough buffer to send data futher\n");
1103 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1104 msg->header.size = htons (total_size);
1105 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1106 msg->tid = htonl (info->origin->tid);
1107 memcpy (&msg[1], &info[1], total_size);
1108 if (0 == --info->copies)
1110 if (NULL != info->client)
1112 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1121 * Function called to notify a client about the socket
1122 * being ready to queue more data. "buf" will be
1123 * NULL and "size" zero if the socket was closed for
1124 * writing in the meantime.
1126 * @param cls closure (MeshDataDescriptor)
1127 * @param size number of bytes available in buf
1128 * @param buf where the callee should write the message
1129 * @return number of bytes written to buf
1132 send_core_path_ack (void *cls, size_t size, void *buf)
1134 struct MeshDataDescriptor *info = cls;
1135 struct GNUNET_MESH_PathACK *msg = buf;
1137 GNUNET_assert (NULL != info);
1140 info->peer->core_transmit[info->handler_n] = NULL;
1142 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1147 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1148 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1149 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1150 msg->tid = htonl (info->origin->tid);
1151 msg->peer_id = my_full_id;
1152 /* TODO add signature */
1154 return sizeof (struct GNUNET_MESH_PathACK);
1159 * Function called to notify a client about the socket
1160 * being ready to queue more data. "buf" will be
1161 * NULL and "size" zero if the socket was closed for
1162 * writing in the meantime.
1164 * @param cls closure (data itself)
1165 * @param size number of bytes available in buf
1166 * @param buf where the callee should write the message
1167 * @return number of bytes written to buf
1170 send_core_data_raw (void *cls, size_t size, void *buf)
1172 struct GNUNET_MessageHeader *msg = cls;
1175 GNUNET_assert (NULL != msg);
1176 total_size = ntohs (msg->size);
1178 if (total_size > size)
1183 memcpy (buf, msg, total_size);
1191 * Send another peer a notification to destroy a tunnel
1192 * @param cls The tunnel to destroy
1193 * @param size Size in the buffer
1194 * @param buf Memory where to put the data to transmit
1195 * @return Size of data put in buffer
1198 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1200 struct MeshTunnel *t = cls;
1201 struct MeshClient *c;
1202 struct GNUNET_MESH_TunnelMessage *msg;
1206 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1207 /*FIXME*/ msg->header.size =
1208 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1209 msg->tunnel_id = htonl (t->id.tid);
1211 destroy_tunnel (c, t);
1212 return sizeof (struct GNUNET_MESH_TunnelMessage);
1218 * Send the message to all clients that have subscribed to its type
1220 * @param msg Pointer to the message itself
1221 * @return number of clients this message was sent to
1224 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1226 struct MeshClient *c;
1230 type = ntohs (msg->type);
1231 for (count = 0, c = clients; c != NULL; c = c->next)
1233 if (is_client_subscribed (type, c))
1236 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1245 * Iterator over hash map peer entries collect all neighbors who to resend the
1248 * @param cls closure (**GNUNET_PEER_Id to store hops to send packet)
1249 * @param key current key code (peer id hash)
1250 * @param value value in the hash map (peer_info)
1251 * @return GNUNET_YES if we should continue to iterate, GNUNET_NO if not.
1254 iterate_collect_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
1256 struct MeshPeerInfo *peer_info = value;
1257 GNUNET_PEER_Id **neighbors = cls;
1261 if (peer_info->id == myid)
1265 id = get_first_hop (peer_info->path);
1266 for (i = 0; *neighbors[i] != 0; i++)
1268 if (*neighbors[i] == id)
1271 *neighbors = GNUNET_realloc (*neighbors, (i + 2) * sizeof (GNUNET_PEER_Id));
1273 *neighbors[i + 1] = 0;
1279 /******************************************************************************/
1280 /******************** MESH NETWORK HANDLERS **************************/
1281 /******************************************************************************/
1285 * Core handler for path creation
1286 * struct GNUNET_CORE_MessageHandler
1288 * @param cls closure
1289 * @param message message
1290 * @param peer peer identity this notification is about
1291 * @param atsi performance data
1292 * @return GNUNET_OK to keep the connection open,
1293 * GNUNET_SYSERR to close it (signal serious error)
1297 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1298 const struct GNUNET_MessageHeader *message,
1299 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1301 unsigned int own_pos;
1304 MESH_TunnelNumber tid;
1305 struct GNUNET_MESH_ManipulatePath *msg;
1306 struct GNUNET_PeerIdentity *pi;
1307 struct GNUNET_PeerIdentity id;
1308 GNUNET_HashCode hash;
1309 struct MeshPath *path;
1310 struct MeshPeerInfo *dest_peer_info;
1311 struct MeshPeerInfo *orig_peer_info;
1312 struct MeshTunnel *t;
1314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1315 "MESH: Received a MESH path create msg\n");
1316 size = ntohs (message->size);
1317 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1319 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1320 "received create path message too short\n");
1324 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1325 if (size < 2 * sizeof (struct GNUNET_PeerIdentity))
1327 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1328 "create path message lacks enough peers\n");
1331 if (size % sizeof (struct GNUNET_PeerIdentity))
1333 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1334 "create path message of wrong size\n");
1337 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1338 size /= sizeof (struct GNUNET_PeerIdentity);
1340 tid = ntohl (msg->tid);
1341 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1342 t = retrieve_tunnel (pi, tid);
1346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1347 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1348 t->id.oid = GNUNET_PEER_intern (pi);
1350 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1352 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1354 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1355 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1363 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1364 if (NULL == dest_peer_info)
1366 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1367 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1368 dest_peer_info->state = MESH_PEER_WAITING;
1369 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1371 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1373 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1374 if (NULL == orig_peer_info)
1376 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1377 orig_peer_info->id = GNUNET_PEER_intern (pi);
1378 orig_peer_info->state = MESH_PEER_WAITING;
1379 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1380 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1384 path = GNUNET_malloc (sizeof (struct MeshPath));
1385 path->length = size;
1386 path->peers = GNUNET_malloc (size * sizeof (GNUNET_PEER_Id));
1388 for (i = 0; i < size; i++)
1390 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1391 if (path->peers[i] == myid)
1395 { /* cannot be self, must be 'not found' */
1396 /* create path: self not found in path through self */
1397 GNUNET_break_op (0);
1398 destroy_path (path);
1399 /* FIXME error. destroy tunnel? leave for timeout? */
1402 if (own_pos == size - 1)
1403 { /* it is for us! */
1404 struct MeshDataDescriptor *info;
1407 add_path_to_origin (orig_peer_info, path); /* inverts path! */
1408 GNUNET_PEER_resolve (get_first_hop (path), &id); /* path is inverted :) */
1409 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1410 info->origin = &t->id;
1411 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1412 GNUNET_assert (info->peer);
1413 for (j = 0; info->peer->core_transmit[j]; j++)
1421 info->handler_n = j;
1422 info->peer->core_transmit[j] =
1423 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1424 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1425 sizeof (struct GNUNET_MessageHeader),
1426 &send_core_path_ack, info);
1430 add_path_to_peer (dest_peer_info, path);
1431 GNUNET_PEER_resolve (get_first_hop (path), &id);
1432 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1433 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1434 sizeof (struct GNUNET_MessageHeader),
1435 &send_core_create_path_for_peer,
1443 * Core handler for mesh network traffic going from the origin to a peer
1445 * @param cls closure
1446 * @param peer peer identity this notification is about
1447 * @param message message
1448 * @param atsi performance data
1449 * @return GNUNET_OK to keep the connection open,
1450 * GNUNET_SYSERR to close it (signal serious error)
1453 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1454 const struct GNUNET_MessageHeader *message,
1455 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1457 struct GNUNET_MESH_Unicast *msg;
1458 struct GNUNET_PeerIdentity id;
1459 struct MeshTunnel *t;
1460 struct MeshPeerInfo *pi;
1463 size = ntohs (message->size);
1465 sizeof (struct GNUNET_MESH_Unicast) +
1466 sizeof (struct GNUNET_MessageHeader))
1471 msg = (struct GNUNET_MESH_Unicast *) message;
1472 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1475 /* TODO notify back: we don't know this tunnel */
1478 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1479 &msg->destination.hashPubKey);
1482 /* TODO maybe feedback, log to statistics */
1487 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1490 GNUNET_PEER_resolve (get_first_hop (pi->path), &id);
1491 msg = GNUNET_malloc (size);
1492 memcpy (msg, message, size);
1493 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1494 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1495 &send_core_data_raw, msg);
1501 * Core handler for mesh network traffic going from the origin to all peers
1503 * @param cls closure
1504 * @param message message
1505 * @param peer peer identity this notification is about
1506 * @param atsi performance data
1507 * @return GNUNET_OK to keep the connection open,
1508 * GNUNET_SYSERR to close it (signal serious error)
1511 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1512 const struct GNUNET_MessageHeader *message,
1513 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1515 struct GNUNET_MESH_Multicast *msg;
1516 struct GNUNET_PeerIdentity id;
1517 struct MeshTunnel *t;
1518 struct MeshDataDescriptor *info;
1519 GNUNET_PEER_Id *neighbors;
1525 size = ntohs (message->size);
1527 sizeof (struct GNUNET_MESH_Multicast) +
1528 sizeof (struct GNUNET_MessageHeader))
1530 GNUNET_break_op (0);
1533 msg = (struct GNUNET_MESH_Multicast *) message;
1534 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1538 /* TODO notify that we dont know that tunnel */
1542 /* Transmit to locally interested clients */
1543 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
1545 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1548 /* Retransmit to other peers */
1549 neighbors = GNUNET_malloc (sizeof (GNUNET_PEER_Id));
1551 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &iterate_collect_neighbors,
1557 size -= sizeof (struct GNUNET_MESH_Multicast);
1558 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + size);
1559 info->origin = &t->id;
1561 for (i = 0; 0 != neighbors[i]; i++)
1563 GNUNET_PEER_resolve (neighbors[i], &id);
1565 info->destination = neighbors[i];
1566 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1567 GNUNET_assert (info->peer);
1568 for (j = 0; info->peer->core_transmit[j]; j++)
1576 info->handler_n = j;
1577 info->peer->infos[j] = info;
1578 info->peer->core_transmit[j] =
1579 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1580 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1581 ntohs (msg->header.size),
1582 &send_core_data_multicast, info);
1589 * Core handler for mesh network traffic
1591 * @param cls closure
1592 * @param message message
1593 * @param peer peer identity this notification is about
1594 * @param atsi performance data
1595 * @return GNUNET_OK to keep the connection open,
1596 * GNUNET_SYSERR to close it (signal serious error)
1599 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
1600 const struct GNUNET_MessageHeader *message,
1601 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1603 struct GNUNET_MESH_ToOrigin *msg;
1604 struct GNUNET_PeerIdentity id;
1605 struct MeshTunnel *t;
1606 struct MeshPeerInfo *peer_info;
1609 size = ntohs (message->size);
1611 sizeof (struct GNUNET_MESH_ToOrigin) +
1612 sizeof (struct GNUNET_MessageHeader))
1614 GNUNET_break_op (0);
1617 msg = (struct GNUNET_MESH_ToOrigin *) message;
1618 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1622 /* TODO notify that we dont know this tunnel (whom)? */
1626 if (t->id.oid == myid)
1628 if (NULL == t->client)
1630 /* got data packet for ownerless tunnel */
1631 GNUNET_break_op (0);
1634 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
1638 peer_info = get_peer_info (&msg->oid);
1639 if (NULL == peer_info)
1641 /* unknown origin of tunnel */
1645 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1646 msg = GNUNET_malloc (size);
1647 memcpy (msg, message, size);
1648 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1649 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1650 &send_core_data_raw, msg);
1657 * Core handler for path ACKs
1659 * @param cls closure
1660 * @param message message
1661 * @param peer peer identity this notification is about
1662 * @param atsi performance data
1663 * @return GNUNET_OK to keep the connection open,
1664 * GNUNET_SYSERR to close it (signal serious error)
1667 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
1668 const struct GNUNET_MessageHeader *message,
1669 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1671 struct GNUNET_MESH_PathACK *msg;
1672 struct GNUNET_PeerIdentity id;
1673 struct MeshTunnel *t;
1674 struct MeshPeerInfo *peer_info;
1676 msg = (struct GNUNET_MESH_PathACK *) message;
1677 t = retrieve_tunnel (&msg->oid, msg->tid);
1680 /* TODO notify that we don't know the tunnel */
1684 /* Message for us? */
1685 if (0 == memcmp (&msg->oid, &my_full_id, sizeof(struct GNUNET_PeerIdentity)))
1687 struct GNUNET_MESH_PeerControl pc;
1689 if (NULL == t->client)
1694 peer_info = get_peer_info (&msg->peer_id);
1695 if (NULL == peer_info)
1697 GNUNET_break_op (0);
1700 peer_info->state = MESH_PEER_READY;
1701 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1702 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1703 pc.tunnel_id = htonl (t->local_tid);
1704 GNUNET_PEER_resolve (peer_info->id, &pc.peer);
1705 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1706 &pc.header, GNUNET_NO);
1710 peer_info = get_peer_info (&msg->oid);
1711 if (NULL == peer_info)
1713 /* If we know the tunnel, we should DEFINITELY know the peer */
1717 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1718 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
1719 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
1720 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1721 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1722 sizeof (struct GNUNET_MESH_PathACK),
1723 &send_core_data_raw, msg);
1729 * Functions to handle messages from core
1731 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1732 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
1733 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
1734 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
1735 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
1736 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1737 sizeof (struct GNUNET_MESH_PathACK)},
1743 /******************************************************************************/
1744 /**************** MESH LOCAL HANDLER HELPERS ***********************/
1745 /******************************************************************************/
1748 * delete_tunnel_entry: iterator for deleting each tunnel that belongs to a
1749 * client when the client disconnects.
1750 * @param cls closure (client that is disconnecting)
1751 * @param key the hash of the local tunnel id (used to access the hashmap)
1752 * @param value the value stored at the key (tunnel to destroy)
1753 * @return GNUNET_OK on success
1756 delete_tunnel_entry (void *cls, const GNUNET_HashCode * key, void *value)
1760 r = destroy_tunnel ((struct MeshTunnel *) value);
1766 * deregister_app: iterator for removing each application registered by a client
1767 * @param cls closure
1768 * @param key the hash of the application id (used to access the hashmap)
1769 * @param value the value stored at the key (client)
1770 * @return GNUNET_OK on success
1773 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
1775 GNUNET_CONTAINER_multihashmap_remove(applications, key, value);
1781 * notify_client_connection_failure: notify a client that the connection to the
1782 * requested remote peer is not possible (for instance, no route found)
1783 * Function called when the socket is ready to queue more data. "buf" will be
1784 * NULL and "size" zero if the socket was closed for writing in the meantime.
1786 * @param cls closure
1787 * @param size number of bytes available in buf
1788 * @param buf where the callee should write the message
1789 * @return number of bytes written to buf
1792 notify_client_connection_failure (void *cls, size_t size, void *buf)
1795 struct MeshPeerInfo *peer_info;
1796 struct GNUNET_MESH_PeerControl *msg;
1797 struct GNUNET_PeerIdentity id;
1799 if (0 == size && NULL == buf)
1801 // TODO retry? cancel?
1805 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
1806 peer_info = (struct MeshPeerInfo *) cls;
1807 msg = (struct GNUNET_MESH_PeerControl *) buf;
1808 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1809 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
1810 // msg->tunnel_id = htonl(peer_info->t->tid);
1811 GNUNET_PEER_resolve (peer_info->id, &id);
1812 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
1820 * Send keepalive packets for a peer
1826 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1828 struct MeshPeerInfo *peer_info = cls;
1829 struct GNUNET_PeerIdentity id;
1831 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1833 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1834 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1835 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1836 sizeof (struct GNUNET_MESH_ManipulatePath)
1838 (peer_info->path->length *
1839 sizeof (struct GNUNET_PeerIdentity)),
1840 &send_core_create_path_for_peer,
1842 peer_info->path_refresh_task =
1843 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh,
1850 * Function to process paths received for a new peer addition. The recorded
1851 * paths form the initial tunnel, which can be optimized later.
1852 * Called on each result obtained for the DHT search.
1854 * @param cls closure
1855 * @param exp when will this value expire
1856 * @param key key of the result
1857 * @param get_path NULL-terminated array of pointers
1858 * to the peers on reverse GET path (or NULL if not recorded)
1859 * @param put_path NULL-terminated array of pointers
1860 * to the peers on the PUT path (or NULL if not recorded)
1861 * @param type type of the result
1862 * @param size number of bytes in data
1863 * @param data pointer to the result data
1866 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1867 const GNUNET_HashCode * key,
1868 const struct GNUNET_PeerIdentity *const *get_path,
1869 const struct GNUNET_PeerIdentity *const *put_path,
1870 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
1872 struct MeshPeerInfo *peer_info = cls;
1874 struct GNUNET_PeerIdentity pi;
1877 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path)
1879 // Find ourselves some alternate initial path to the destination: retry
1880 GNUNET_DHT_get_stop (peer_info->dhtget);
1881 GNUNET_PEER_resolve (peer_info->id, &pi);
1882 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1883 GNUNET_TIME_UNIT_FOREVER_REL,
1884 GNUNET_BLOCK_TYPE_TEST, /* type */
1885 &pi.hashPubKey, /*key to search */
1886 4, /* replication level */
1887 GNUNET_DHT_RO_RECORD_ROUTE,
1888 NULL, /* bloom filter */
1891 0, /* xquery bits */
1893 (void *) peer_info);
1896 p = GNUNET_malloc (sizeof (struct MeshPath));
1897 for (i = 0; get_path[i] != NULL; i++) ;
1898 for (i--; i >= 0; i--)
1901 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1902 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1905 for (i = 0; put_path[i] != NULL; i++) ;
1906 for (i--; i >= 0; i--)
1909 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1910 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
1913 add_path_to_peer (peer_info, p);
1914 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1915 GNUNET_TIME_UNIT_FOREVER_REL, get_path[1],
1916 sizeof (struct GNUNET_MESH_ManipulatePath)
1919 sizeof (struct GNUNET_PeerIdentity)),
1920 &send_core_create_path_for_peer,
1922 if (0 == peer_info->path_refresh_task)
1924 peer_info->path_refresh_task =
1925 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh,
1933 * Function to process paths received for a new peer addition. The recorded
1934 * paths form the initial tunnel, which can be optimized later.
1935 * Called on each result obtained for the DHT search.
1937 * @param cls closure
1938 * @param exp when will this value expire
1939 * @param key key of the result
1940 * @param get_path NULL-terminated array of pointers
1941 * to the peers on reverse GET path (or NULL if not recorded)
1942 * @param put_path NULL-terminated array of pointers
1943 * to the peers on the PUT path (or NULL if not recorded)
1944 * @param type type of the result
1945 * @param size number of bytes in data
1946 * @param data pointer to the result data
1949 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1950 const GNUNET_HashCode * key,
1951 const struct GNUNET_PeerIdentity *const *get_path,
1952 const struct GNUNET_PeerIdentity *const *put_path,
1953 enum GNUNET_BLOCK_Type type, size_t size,
1956 const struct GNUNET_PeerIdentity *pi = data;
1957 struct MeshTunnel *t = cls;
1958 struct MeshPeerInfo *peer_info;
1963 if (size != sizeof (struct GNUNET_PeerIdentity))
1965 GNUNET_break_op (0);
1968 GNUNET_assert (NULL != t->client);
1969 GNUNET_DHT_get_stop(t->client->dht_get_type);
1970 t->client->dht_get_type = NULL;
1971 peer_info = get_peer_info (pi);
1972 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
1973 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1974 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path)
1976 /* we don't have a route to the peer, let's try a direct lookup */
1977 if (NULL == peer_info->dhtget)
1979 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1980 GNUNET_TIME_UNIT_FOREVER_REL,
1981 GNUNET_BLOCK_TYPE_TEST,
1983 10U, /* replication level */
1984 GNUNET_DHT_RO_RECORD_ROUTE,
1985 NULL, /* bloom filter */
1988 0, /* xquery bits */
1989 dht_get_id_handler, peer_info);
1993 p = GNUNET_malloc (sizeof (struct MeshPath));
1994 for (i = 0; get_path[i] != NULL; i++) ;
1995 for (i--; i >= 0; i--)
1998 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1999 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
2002 for (i = 0; put_path[i] != NULL; i++) ;
2003 for (i--; i >= 0; i--)
2006 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
2007 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
2010 add_path_to_peer (peer_info, p);
2011 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2012 GNUNET_TIME_UNIT_FOREVER_REL, get_path[1],
2013 sizeof (struct GNUNET_MESH_ManipulatePath)
2016 sizeof (struct GNUNET_PeerIdentity)),
2017 &send_core_create_path_for_peer,
2022 /******************************************************************************/
2023 /********************* MESH LOCAL HANDLES **************************/
2024 /******************************************************************************/
2028 * Handler for client disconnection
2030 * @param cls closure
2031 * @param client identification of the client; NULL
2032 * for the last call when the server is destroyed
2035 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2037 struct MeshClient *c;
2038 struct MeshClient *next;
2040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2044 if (c->handle != client)
2046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2051 if (NULL != c->tunnels)
2053 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2054 &delete_tunnel_entry,
2056 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2059 /* deregister clients applications */
2060 if (NULL != c->apps)
2062 GNUNET_CONTAINER_multihashmap_iterate(c->apps, &deregister_app, NULL);
2063 GNUNET_CONTAINER_multihashmap_destroy(c->apps);
2065 if (0 == GNUNET_CONTAINER_multihashmap_size(applications) &&
2066 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
2068 GNUNET_SCHEDULER_cancel (announce_applications_task);
2069 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
2071 if (NULL != c->types)
2072 GNUNET_CONTAINER_multihashmap_destroy(c->types);
2073 if (NULL != c->dht_get_type)
2074 GNUNET_DHT_get_stop(c->dht_get_type);
2075 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2087 * Handler for new clients
2089 * @param cls closure
2090 * @param client identification of the client
2091 * @param message the actual message, which includes messages the client wants
2094 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2095 const struct GNUNET_MessageHeader *message)
2097 struct GNUNET_MESH_ClientConnect *cc_msg;
2098 struct MeshClient *c;
2099 GNUNET_MESH_ApplicationType *a;
2106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2107 /* Check data sanity */
2108 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2109 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2110 ntypes = ntohs (cc_msg->types);
2111 napps = ntohs (cc_msg->applications);
2113 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2116 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2120 /* Create new client structure */
2121 c = GNUNET_malloc (sizeof (struct MeshClient));
2123 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2126 GNUNET_MESH_ApplicationType at;
2129 c->apps = GNUNET_CONTAINER_multihashmap_create(napps);
2130 for (i = 0; i < napps; i++)
2133 GNUNET_CRYPTO_hash(&at, sizeof(at), &hc);
2134 /* store in clients hashmap */
2135 GNUNET_CONTAINER_multihashmap_put(
2139 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2140 /* store in global hashmap, for announcements */
2141 GNUNET_CONTAINER_multihashmap_put(
2145 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2147 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2148 announce_applications_task = GNUNET_SCHEDULER_add_now (
2149 &announce_applications, NULL);
2157 t = (uint16_t *) &a[napps];
2158 c->types = GNUNET_CONTAINER_multihashmap_create(ntypes);
2159 for (i =0; i < ntypes; i++)
2162 GNUNET_CRYPTO_hash(&u16, sizeof(u16), &hc);
2163 /* store in clients hashmap */
2164 GNUNET_CONTAINER_multihashmap_put(
2168 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2169 /* store in global hashmap */
2170 GNUNET_CONTAINER_multihashmap_put(
2174 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2177 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2178 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2180 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2181 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2182 GNUNET_SERVER_notification_context_add (nc, client);
2184 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2190 * Handler for requests of new tunnels
2192 * @param cls closure
2193 * @param client identification of the client
2194 * @param message the actual message
2197 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2198 const struct GNUNET_MessageHeader *message)
2200 struct GNUNET_MESH_TunnelMessage *t_msg;
2201 struct MeshTunnel *t;
2202 struct MeshClient *c;
2203 GNUNET_HashCode hash;
2205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2207 /* Sanity check for client registration */
2208 if (NULL == (c = retrieve_client (client)))
2211 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2215 /* Message sanity check */
2216 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2219 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2223 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2224 /* Sanity check for tunnel numbering */
2225 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2228 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2231 /* Sanity check for duplicate tunnel IDs */
2232 if (NULL != retrieve_tunnel_by_local_id (c, ntohl (t_msg->tunnel_id)))
2235 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2239 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2240 while (NULL != retrieve_tunnel_by_pi (myid, next_tid))
2241 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2242 t->id.tid = next_tid++;
2244 t->local_tid = ntohl (t_msg->tunnel_id);
2246 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2248 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2250 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2251 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2254 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2258 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2260 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2261 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2264 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2268 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2274 * Handler for requests of deleting tunnels
2276 * @param cls closure
2277 * @param client identification of the client
2278 * @param message the actual message
2281 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2282 const struct GNUNET_MessageHeader *message)
2284 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2285 struct MeshClient *c;
2286 struct MeshTunnel *t;
2287 MESH_TunnelNumber tid;
2288 GNUNET_HashCode hash;
2290 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2292 /* Sanity check for client registration */
2293 if (NULL == (c = retrieve_client (client)))
2296 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2299 /* Message sanity check */
2300 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2303 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2307 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2309 /* Retrieve tunnel */
2310 tid = ntohl (tunnel_msg->tunnel_id);
2312 /* Remove from local id hashmap */
2313 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2314 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2315 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2317 /* Remove from global id hashmap */
2318 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2319 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2321 // notify_tunnel_destroy(t);
2322 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2328 * Handler for connection requests to new peers
2330 * @param cls closure
2331 * @param client identification of the client
2332 * @param message the actual message (PeerControl)
2335 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2336 const struct GNUNET_MessageHeader *message)
2338 struct GNUNET_MESH_PeerControl *peer_msg;
2339 struct MeshClient *c;
2340 struct MeshTunnel *t;
2341 MESH_TunnelNumber tid;
2342 struct MeshPeerInfo *peer_info;
2345 /* Sanity check for client registration */
2346 if (NULL == (c = retrieve_client (client)))
2349 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2353 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2354 /* Sanity check for message size */
2355 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2358 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2362 /* Tunnel exists? */
2363 tid = ntohl (peer_msg->tunnel_id);
2364 t = retrieve_tunnel_by_local_id (c, tid);
2368 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2372 /* Does client own tunnel? */
2373 if (t->client->handle != client)
2376 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2381 peer_info = get_peer_info (&peer_msg->peer);
2383 /* Start DHT search if needed */
2384 if (MESH_PEER_READY != peer_info->state && NULL == peer_info->dhtget)
2386 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
2387 GNUNET_BLOCK_TYPE_TEST,
2388 &peer_msg->peer.hashPubKey, 4, /* replication level */
2389 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2392 0, /* xquery bits */
2394 (void *) peer_info);
2397 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2403 * Handler for disconnection requests of peers in a tunnel
2405 * @param cls closure
2406 * @param client identification of the client
2407 * @param message the actual message (PeerControl)
2410 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2411 const struct GNUNET_MessageHeader *message)
2413 struct GNUNET_MESH_PeerControl *peer_msg;
2414 struct MeshClient *c;
2415 struct MeshTunnel *t;
2416 MESH_TunnelNumber tid;
2418 /* Sanity check for client registration */
2419 if (NULL == (c = retrieve_client (client)))
2422 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2425 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2426 /* Sanity check for message size */
2427 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2430 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2434 /* Tunnel exists? */
2435 tid = ntohl (peer_msg->tunnel_id);
2436 t = retrieve_tunnel_by_local_id (c, tid);
2440 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2444 /* Does client own tunnel? */
2445 if (t->client->handle != client)
2448 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2452 /* Ok, delete peer from tunnel */
2453 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2454 &peer_msg->peer.hashPubKey);
2456 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2462 * Handler for connection requests to new peers by type
2464 * @param cls closure
2465 * @param client identification of the client
2466 * @param message the actual message (ConnectPeerByType)
2469 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2470 const struct GNUNET_MessageHeader *message)
2472 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2473 struct MeshClient *c;
2474 struct MeshTunnel *t;
2475 GNUNET_HashCode hash;
2476 GNUNET_MESH_ApplicationType type;
2477 MESH_TunnelNumber tid;
2479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
2480 /* Sanity check for client registration */
2481 if (NULL == (c = retrieve_client (client)))
2484 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2488 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2489 /* Sanity check for message size */
2490 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
2491 ntohs (connect_msg->header.size))
2494 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2498 /* Tunnel exists? */
2499 tid = ntohl (connect_msg->tunnel_id);
2500 t = retrieve_tunnel_by_local_id (c, tid);
2504 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2508 /* Does client own tunnel? */
2509 if (t->client->handle != client)
2512 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2516 /* Do WE have the service? */
2517 type = ntohl (connect_msg->type);
2518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", type);
2519 GNUNET_CRYPTO_hash (&type, sizeof (GNUNET_MESH_ApplicationType), &hash);
2520 if (GNUNET_CONTAINER_multihashmap_contains(applications, &hash) == GNUNET_YES)
2522 /* Yes! Fast forward, add ourselves to the tunnel and send the
2523 * good news to the client
2525 struct GNUNET_MESH_PeerControl pc;
2527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
2528 pc.peer = my_full_id;
2529 GNUNET_CONTAINER_multihashmap_put (t->peers, &pc.peer.hashPubKey,
2530 get_peer_info (&pc.peer),
2531 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2532 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2533 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2534 pc.tunnel_id = htonl (t->local_tid);
2535 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
2536 GNUNET_SERVER_notification_context_unicast (nc, /* context */
2538 &pc.header, /* msg */
2539 GNUNET_NO); /* can drop? */
2540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
2541 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2544 /* Ok, lets find a peer offering the service */
2545 if (c->dht_get_type)
2547 GNUNET_DHT_get_stop (c->dht_get_type);
2549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2550 "MESH: looking in DHT for %s\n",
2551 GNUNET_h2s_full(&hash));
2553 GNUNET_DHT_get_start (dht_handle,
2554 GNUNET_TIME_UNIT_FOREVER_REL,
2555 GNUNET_BLOCK_TYPE_TEST,
2558 GNUNET_DHT_RO_RECORD_ROUTE,
2563 &dht_get_type_handler,
2566 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2572 * Handler for client traffic directed to one peer
2574 * @param cls closure
2575 * @param client identification of the client
2576 * @param message the actual message
2579 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
2580 const struct GNUNET_MessageHeader *message)
2582 struct MeshClient *c;
2583 struct MeshTunnel *t;
2584 struct MeshPeerInfo *pi;
2585 struct GNUNET_MESH_Unicast *data_msg;
2586 struct GNUNET_PeerIdentity next_hop;
2587 struct MeshDataDescriptor *info;
2588 MESH_TunnelNumber tid;
2591 /* Sanity check for client registration */
2592 if (NULL == (c = retrieve_client (client)))
2595 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2598 data_msg = (struct GNUNET_MESH_Unicast *) message;
2599 /* Sanity check for message size */
2600 if (sizeof (struct GNUNET_MESH_Unicast) +
2601 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
2604 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2608 /* Tunnel exists? */
2609 tid = ntohl (data_msg->tid);
2610 t = retrieve_tunnel_by_local_id (c, tid);
2614 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2618 /* Is it a local tunnel? Then, does client own the tunnel? */
2619 if (t->client->handle != NULL && t->client->handle != client)
2622 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2626 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2627 &data_msg->destination.hashPubKey);
2628 /* Is the selected peer in the tunnel? */
2632 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2637 struct GNUNET_MESH_Unicast copy;
2639 /* Work around const limitation */
2640 memcpy (©, data_msg, sizeof (struct GNUNET_MESH_Unicast));
2641 copy.oid = my_full_id;
2642 copy.tid = htonl(t->id.tid);
2643 handle_mesh_data_unicast (NULL, &my_full_id, ©.header, NULL);
2646 GNUNET_PEER_resolve (get_first_hop (pi->path), &next_hop);
2647 data_size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Unicast);
2648 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + data_size);
2649 memcpy (&info[1], &data_msg[1], data_size);
2650 info->destination = pi->id;
2651 info->origin = &t->id;
2652 info->size = data_size;
2653 info->client = client;
2654 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2655 GNUNET_TIME_UNIT_FOREVER_REL, &next_hop,
2656 /* FIXME re-check types */
2658 sizeof (struct GNUNET_MESH_Unicast),
2659 &send_core_data_unicast, info);
2664 * Handler for client traffic directed to all peers in a tunnel
2666 * @param cls closure
2667 * @param client identification of the client
2668 * @param message the actual message
2671 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
2672 const struct GNUNET_MessageHeader *message)
2674 struct MeshClient *c;
2675 struct MeshTunnel *t;
2676 struct GNUNET_MESH_Multicast *data_msg;
2677 MESH_TunnelNumber tid;
2679 /* Sanity check for client registration */
2680 if (NULL == (c = retrieve_client (client)))
2683 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2686 data_msg = (struct GNUNET_MESH_Multicast *) message;
2687 /* Sanity check for message size */
2688 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
2691 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2695 /* Tunnel exists? */
2696 tid = ntohl (data_msg->tid);
2697 t = retrieve_tunnel_by_local_id (c, tid);
2701 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2705 /* Does client own tunnel? */
2706 if (t->client->handle != client)
2709 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2715 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2720 * Functions to handle messages from clients
2722 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
2723 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
2724 {&handle_local_tunnel_create, NULL,
2725 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
2726 sizeof (struct GNUNET_MESH_TunnelMessage)},
2727 {&handle_local_tunnel_destroy, NULL,
2728 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
2729 sizeof (struct GNUNET_MESH_TunnelMessage)},
2730 {&handle_local_connect_add, NULL,
2731 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
2732 sizeof (struct GNUNET_MESH_PeerControl)},
2733 {&handle_local_connect_del, NULL,
2734 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
2735 sizeof (struct GNUNET_MESH_PeerControl)},
2736 {&handle_local_connect_by_type, NULL,
2737 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
2738 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
2739 {&handle_local_unicast, NULL,
2740 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2741 {&handle_local_unicast, NULL,
2742 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2743 {&handle_local_multicast, NULL,
2744 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2750 * To be called on core init/fail.
2752 * @param cls service closure
2753 * @param server handle to the server for this service
2754 * @param identity the public identity of this peer
2755 * @param publicKey the public key of this peer
2758 core_init (void *cls, struct GNUNET_CORE_Handle *server,
2759 const struct GNUNET_PeerIdentity *identity,
2760 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
2762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
2763 core_handle = server;
2764 my_full_id = *identity;
2765 myid = GNUNET_PEER_intern (identity);
2766 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
2771 * Method called whenever a given peer connects.
2773 * @param cls closure
2774 * @param peer peer identity this notification is about
2775 * @param atsi performance data for the connection
2778 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
2779 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2781 // GNUNET_PEER_Id pid;
2782 struct MeshPeerInfo *peer_info;
2783 struct MeshPath *path;
2785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
2786 peer_info = get_peer_info (peer);
2787 if (myid == peer_info->id)
2789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
2791 path = GNUNET_malloc (sizeof (struct MeshPath));
2793 path->peers = GNUNET_malloc (sizeof (GNUNET_PEER_Id) * 2);
2794 path->peers[0] = myid;
2795 path->peers[1] = peer_info->id;
2796 add_path_to_peer (peer_info, path);
2801 * Method called whenever a peer disconnects.
2803 * @param cls closure
2804 * @param peer peer identity this notification is about
2807 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
2809 struct MeshPeerInfo *pi;
2812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
2813 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2819 for (i = 0; i < CORE_QUEUE_SIZE; i++)
2821 if (pi->core_transmit[i])
2823 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
2824 /* TODO: notify that tranmission has failed */
2825 GNUNET_free (pi->infos[i]);
2830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
2836 /******************************************************************************/
2837 /************************ MAIN FUNCTIONS ****************************/
2838 /******************************************************************************/
2841 * Task run during shutdown.
2847 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2849 struct MeshClient *c;
2851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
2852 if (core_handle != NULL)
2854 GNUNET_CORE_disconnect (core_handle);
2857 if (dht_handle != NULL)
2859 for (c = clients; NULL != c; c = c->next)
2860 if (NULL != c->dht_get_type)
2861 GNUNET_DHT_get_stop(c->dht_get_type);
2862 GNUNET_DHT_disconnect (dht_handle);
2867 GNUNET_SERVER_notification_context_destroy (nc);
2870 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
2872 GNUNET_SCHEDULER_cancel (announce_id_task);
2873 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
2875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
2879 * Process mesh requests.
2881 * @param cls closure
2882 * @param server the initialized server
2883 * @param c configuration to use
2886 run (void *cls, struct GNUNET_SERVER_Handle *server,
2887 const struct GNUNET_CONFIGURATION_Handle *c)
2889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
2890 GNUNET_SERVER_add_handlers (server, plugin_handlers);
2891 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
2892 server_handle = server;
2893 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
2894 CORE_QUEUE_SIZE, /* queue size */
2895 NULL, /* Closure passed to MESH functions */
2896 &core_init, /* Call core_init once connected */
2897 &core_connect, /* Handle connects */
2898 &core_disconnect, /* remove peers on disconnects */
2899 NULL, /* Do we care about "status" updates? */
2900 NULL, /* Don't notify about all incoming messages */
2901 GNUNET_NO, /* For header only in notification */
2902 NULL, /* Don't notify about all outbound messages */
2903 GNUNET_NO, /* For header-only out notification */
2904 core_handlers); /* Register these handlers */
2905 if (core_handle == NULL)
2909 dht_handle = GNUNET_DHT_connect (c, 64);
2910 if (dht_handle == NULL)
2912 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Error connecting to DHT.\
2913 Running without DHT has a severe\
2914 impact in MESH capabilities.\n\
2915 Plase check your configuretion and enable DHT.\n");
2921 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2922 peers = GNUNET_CONTAINER_multihashmap_create (32);
2923 applications = GNUNET_CONTAINER_multihashmap_create (32);
2924 types = GNUNET_CONTAINER_multihashmap_create (32);
2925 nc = GNUNET_SERVER_notification_context_create (server_handle,
2928 clients_tail = NULL;
2930 announce_applications_task = 0;
2932 /* Scheduled the task to clean up when shutdown is called */
2933 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
2936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
2940 * The main function for the mesh service.
2942 * @param argc number of arguments from the command line
2943 * @param argv command line arguments
2944 * @return 0 ok, 1 on error
2947 main (int argc, char *const *argv)
2951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
2954 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
2956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");