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 (),
830 &mesh_debug, "DHT_put for app completed");
839 * Periodically announce what applications are provided by local clients
842 * @param tc task context
845 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
847 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
849 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
853 GNUNET_CONTAINER_multihashmap_iterate(applications,
854 &announce_application,
856 announce_applications_task =
857 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
859 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
865 * Periodically announce self id in the DHT
868 * @param tc task context
871 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
873 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
875 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
879 * - Set data expiration in function of X
882 GNUNET_DHT_put (dht_handle, /* DHT handle */
883 &my_full_id.hashPubKey, /* Key to use */
884 10U, /* Replication level */
885 GNUNET_DHT_RO_RECORD_ROUTE, /* DHT options */
886 GNUNET_BLOCK_TYPE_TEST, /* Block type */
887 0, /* Size of the data */
888 NULL, /* Data itself */
889 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
890 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
892 &mesh_debug, "DHT_put for id completed");
894 NULL, /* Continuation */
895 NULL); /* Continuation closure */
898 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
901 /******************************************************************************/
902 /**************** MESH NETWORK HANDLER HELPERS ***********************/
903 /******************************************************************************/
906 * Function called to notify a client about the socket
907 * being ready to queue more data. "buf" will be
908 * NULL and "size" zero if the socket was closed for
909 * writing in the meantime.
912 * @param size number of bytes available in buf
913 * @param buf where the callee should write the message
914 * @return number of bytes written to buf
917 send_core_create_path_for_peer (void *cls, size_t size, void *buf)
919 struct MeshPeerInfo *peer_info = cls;
920 struct GNUNET_MESH_ManipulatePath *msg;
922 struct GNUNET_PeerIdentity *peer_ptr;
923 struct GNUNET_PeerIdentity id;
927 if (0 == size && NULL == buf)
929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting create path\n");
930 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
931 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
932 GNUNET_TIME_UNIT_FOREVER_REL, &id,
934 GNUNET_MESH_ManipulatePath) +
935 (peer_info->path->length *
936 sizeof (struct GNUNET_PeerIdentity)),
937 &send_core_create_path_for_peer,
951 return 0; // TODO Notify ERROR Path not found
954 sizeof (struct GNUNET_MESH_ManipulatePath) +
955 p->length * sizeof (struct GNUNET_PeerIdentity);
956 if (size < size_needed)
958 // TODO retry? cancel?
962 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
963 msg->header.size = htons (size_needed);
964 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
966 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
967 for (i = 0; i < p->length; i++)
969 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
972 peer_info->state = MESH_PEER_WAITING;
980 * Function called to notify a client about the socket
981 * being ready to queue more data. "buf" will be
982 * NULL and "size" zero if the socket was closed for
983 * writing in the meantime.
985 * @param cls closure (MeshDataDescriptor with all info to build packet)
986 * @param size number of bytes available in buf
987 * @param buf where the callee should write the message
988 * @return number of bytes written to buf
991 send_core_data_to_origin (void *cls, size_t size, void *buf)
993 struct MeshDataDescriptor *info = cls;
994 struct GNUNET_MESH_ToOrigin *msg = buf;
997 GNUNET_assert (NULL != info);
998 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
999 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1001 if (total_size > size)
1003 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1004 "not enough buffer to send data to origin\n");
1007 msg->header.size = htons (total_size);
1008 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1009 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1010 msg->tid = htonl (info->origin->tid);
1011 if (0 != info->size)
1013 memcpy (&msg[1], &info[1], info->size);
1015 if (NULL != info->client)
1017 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1025 * Function called to notify a client about the socket
1026 * being ready to queue more data. "buf" will be
1027 * NULL and "size" zero if the socket was closed for
1028 * writing in the meantime.
1030 * @param cls closure (data itself)
1031 * @param size number of bytes available in buf
1032 * @param buf where the callee should write the message
1033 * @return number of bytes written to buf
1036 send_core_data_unicast (void *cls, size_t size, void *buf)
1038 struct MeshDataDescriptor *info = cls;
1039 struct GNUNET_MESH_Unicast *msg = buf;
1042 GNUNET_assert (NULL != info);
1043 total_size = sizeof (struct GNUNET_MESH_Unicast) + info->size;
1044 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1046 if (total_size > size)
1048 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1049 "not enough buffer to send data to peer\n");
1052 msg->header.size = htons (total_size);
1053 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
1054 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1055 GNUNET_PEER_resolve (info->destination, &msg->destination);
1056 msg->tid = htonl (info->origin->tid);
1057 if (0 != info->size)
1059 memcpy (&msg[1], &info[1], info->size);
1061 if (NULL != info->client)
1063 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1071 * Function called to notify a client about the socket
1072 * being ready to queue more data. "buf" will be
1073 * NULL and "size" zero if the socket was closed for
1074 * writing in the meantime.
1076 * @param cls closure (data itself)
1077 * @param size number of bytes available in buf
1078 * @param buf where the callee should write the message
1079 * @return number of bytes written to buf
1082 send_core_data_multicast (void *cls, size_t size, void *buf)
1084 struct MeshDataDescriptor *info = cls;
1085 struct GNUNET_MESH_Multicast *msg = buf;
1088 GNUNET_assert (NULL != info);
1089 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1090 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1094 info->peer->core_transmit[info->handler_n] = NULL;
1096 if (total_size > size)
1098 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1099 "not enough buffer to send data futher\n");
1102 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1103 msg->header.size = htons (total_size);
1104 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1105 msg->tid = htonl (info->origin->tid);
1106 memcpy (&msg[1], &info[1], total_size);
1107 if (0 == --info->copies)
1109 if (NULL != info->client)
1111 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1120 * Function called to notify a client about the socket
1121 * being ready to queue more data. "buf" will be
1122 * NULL and "size" zero if the socket was closed for
1123 * writing in the meantime.
1125 * @param cls closure (MeshDataDescriptor)
1126 * @param size number of bytes available in buf
1127 * @param buf where the callee should write the message
1128 * @return number of bytes written to buf
1131 send_core_path_ack (void *cls, size_t size, void *buf)
1133 struct MeshDataDescriptor *info = cls;
1134 struct GNUNET_MESH_PathACK *msg = buf;
1136 GNUNET_assert (NULL != info);
1139 info->peer->core_transmit[info->handler_n] = NULL;
1141 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1146 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1147 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1148 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1149 msg->tid = htonl (info->origin->tid);
1150 msg->peer_id = my_full_id;
1151 /* TODO add signature */
1153 return sizeof (struct GNUNET_MESH_PathACK);
1158 * Function called to notify a client about the socket
1159 * being ready to queue more data. "buf" will be
1160 * NULL and "size" zero if the socket was closed for
1161 * writing in the meantime.
1163 * @param cls closure (data itself)
1164 * @param size number of bytes available in buf
1165 * @param buf where the callee should write the message
1166 * @return number of bytes written to buf
1169 send_core_data_raw (void *cls, size_t size, void *buf)
1171 struct GNUNET_MessageHeader *msg = cls;
1174 GNUNET_assert (NULL != msg);
1175 total_size = ntohs (msg->size);
1177 if (total_size > size)
1182 memcpy (buf, msg, total_size);
1190 * Send another peer a notification to destroy a tunnel
1191 * @param cls The tunnel to destroy
1192 * @param size Size in the buffer
1193 * @param buf Memory where to put the data to transmit
1194 * @return Size of data put in buffer
1197 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1199 struct MeshTunnel *t = cls;
1200 struct MeshClient *c;
1201 struct GNUNET_MESH_TunnelMessage *msg;
1205 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1206 /*FIXME*/ msg->header.size =
1207 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1208 msg->tunnel_id = htonl (t->id.tid);
1210 destroy_tunnel (c, t);
1211 return sizeof (struct GNUNET_MESH_TunnelMessage);
1217 * Send the message to all clients that have subscribed to its type
1219 * @param msg Pointer to the message itself
1220 * @return number of clients this message was sent to
1223 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1225 struct MeshClient *c;
1229 type = ntohs (msg->type);
1230 for (count = 0, c = clients; c != NULL; c = c->next)
1232 if (is_client_subscribed (type, c))
1235 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1244 * Iterator over hash map peer entries collect all neighbors who to resend the
1247 * @param cls closure (**GNUNET_PEER_Id to store hops to send packet)
1248 * @param key current key code (peer id hash)
1249 * @param value value in the hash map (peer_info)
1250 * @return GNUNET_YES if we should continue to iterate, GNUNET_NO if not.
1253 iterate_collect_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
1255 struct MeshPeerInfo *peer_info = value;
1256 GNUNET_PEER_Id **neighbors = cls;
1260 if (peer_info->id == myid)
1264 id = get_first_hop (peer_info->path);
1265 for (i = 0; *neighbors[i] != 0; i++)
1267 if (*neighbors[i] == id)
1270 *neighbors = GNUNET_realloc (*neighbors, (i + 2) * sizeof (GNUNET_PEER_Id));
1272 *neighbors[i + 1] = 0;
1278 /******************************************************************************/
1279 /******************** MESH NETWORK HANDLERS **************************/
1280 /******************************************************************************/
1284 * Core handler for path creation
1285 * struct GNUNET_CORE_MessageHandler
1287 * @param cls closure
1288 * @param message message
1289 * @param peer peer identity this notification is about
1290 * @param atsi performance data
1291 * @return GNUNET_OK to keep the connection open,
1292 * GNUNET_SYSERR to close it (signal serious error)
1296 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1297 const struct GNUNET_MessageHeader *message,
1298 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1300 unsigned int own_pos;
1303 MESH_TunnelNumber tid;
1304 struct GNUNET_MESH_ManipulatePath *msg;
1305 struct GNUNET_PeerIdentity *pi;
1306 struct GNUNET_PeerIdentity id;
1307 GNUNET_HashCode hash;
1308 struct MeshPath *path;
1309 struct MeshPeerInfo *dest_peer_info;
1310 struct MeshPeerInfo *orig_peer_info;
1311 struct MeshTunnel *t;
1313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1314 "MESH: Received a MESH path create msg\n");
1315 size = ntohs (message->size);
1316 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1318 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1319 "received create path message too short\n");
1323 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1324 if (size < 2 * sizeof (struct GNUNET_PeerIdentity))
1326 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1327 "create path message lacks enough peers\n");
1330 if (size % sizeof (struct GNUNET_PeerIdentity))
1332 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1333 "create path message of wrong size\n");
1336 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1337 size /= sizeof (struct GNUNET_PeerIdentity);
1339 tid = ntohl (msg->tid);
1340 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1341 t = retrieve_tunnel (pi, tid);
1345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1346 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1347 t->id.oid = GNUNET_PEER_intern (pi);
1349 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1351 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1353 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1354 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1362 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1363 if (NULL == dest_peer_info)
1365 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1366 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1367 dest_peer_info->state = MESH_PEER_WAITING;
1368 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1370 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1372 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1373 if (NULL == orig_peer_info)
1375 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1376 orig_peer_info->id = GNUNET_PEER_intern (pi);
1377 orig_peer_info->state = MESH_PEER_WAITING;
1378 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1379 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1383 path = GNUNET_malloc (sizeof (struct MeshPath));
1384 path->length = size;
1385 path->peers = GNUNET_malloc (size * sizeof (GNUNET_PEER_Id));
1387 for (i = 0; i < size; i++)
1389 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1390 if (path->peers[i] == myid)
1394 { /* cannot be self, must be 'not found' */
1395 /* create path: self not found in path through self */
1396 GNUNET_break_op (0);
1397 destroy_path (path);
1398 /* FIXME error. destroy tunnel? leave for timeout? */
1401 if (own_pos == size - 1)
1402 { /* it is for us! */
1403 struct MeshDataDescriptor *info;
1406 add_path_to_origin (orig_peer_info, path); /* inverts path! */
1407 GNUNET_PEER_resolve (get_first_hop (path), &id); /* path is inverted :) */
1408 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1409 info->origin = &t->id;
1410 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1411 GNUNET_assert (info->peer);
1412 for (j = 0; info->peer->core_transmit[j]; j++)
1420 info->handler_n = j;
1421 info->peer->core_transmit[j] =
1422 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1423 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1424 sizeof (struct GNUNET_MessageHeader),
1425 &send_core_path_ack, info);
1429 add_path_to_peer (dest_peer_info, path);
1430 GNUNET_PEER_resolve (get_first_hop (path), &id);
1431 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1432 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1433 sizeof (struct GNUNET_MessageHeader),
1434 &send_core_create_path_for_peer,
1442 * Core handler for mesh network traffic going from the origin to a peer
1444 * @param cls closure
1445 * @param peer peer identity this notification is about
1446 * @param message message
1447 * @param atsi performance data
1448 * @return GNUNET_OK to keep the connection open,
1449 * GNUNET_SYSERR to close it (signal serious error)
1452 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1453 const struct GNUNET_MessageHeader *message,
1454 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1456 struct GNUNET_MESH_Unicast *msg;
1457 struct GNUNET_PeerIdentity id;
1458 struct MeshTunnel *t;
1459 struct MeshPeerInfo *pi;
1462 size = ntohs (message->size);
1464 sizeof (struct GNUNET_MESH_Unicast) +
1465 sizeof (struct GNUNET_MessageHeader))
1470 msg = (struct GNUNET_MESH_Unicast *) message;
1471 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1474 /* TODO notify back: we don't know this tunnel */
1477 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1478 &msg->destination.hashPubKey);
1481 /* TODO maybe feedback, log to statistics */
1486 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1489 GNUNET_PEER_resolve (get_first_hop (pi->path), &id);
1490 msg = GNUNET_malloc (size);
1491 memcpy (msg, message, size);
1492 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1493 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1494 &send_core_data_raw, msg);
1500 * Core handler for mesh network traffic going from the origin to all peers
1502 * @param cls closure
1503 * @param message message
1504 * @param peer peer identity this notification is about
1505 * @param atsi performance data
1506 * @return GNUNET_OK to keep the connection open,
1507 * GNUNET_SYSERR to close it (signal serious error)
1510 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1511 const struct GNUNET_MessageHeader *message,
1512 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1514 struct GNUNET_MESH_Multicast *msg;
1515 struct GNUNET_PeerIdentity id;
1516 struct MeshTunnel *t;
1517 struct MeshDataDescriptor *info;
1518 GNUNET_PEER_Id *neighbors;
1524 size = ntohs (message->size);
1526 sizeof (struct GNUNET_MESH_Multicast) +
1527 sizeof (struct GNUNET_MessageHeader))
1529 GNUNET_break_op (0);
1532 msg = (struct GNUNET_MESH_Multicast *) message;
1533 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1537 /* TODO notify that we dont know that tunnel */
1541 /* Transmit to locally interested clients */
1542 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
1544 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1547 /* Retransmit to other peers */
1548 neighbors = GNUNET_malloc (sizeof (GNUNET_PEER_Id));
1550 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &iterate_collect_neighbors,
1556 size -= sizeof (struct GNUNET_MESH_Multicast);
1557 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + size);
1558 info->origin = &t->id;
1560 for (i = 0; 0 != neighbors[i]; i++)
1562 GNUNET_PEER_resolve (neighbors[i], &id);
1564 info->destination = neighbors[i];
1565 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1566 GNUNET_assert (info->peer);
1567 for (j = 0; info->peer->core_transmit[j]; j++)
1575 info->handler_n = j;
1576 info->peer->infos[j] = info;
1577 info->peer->core_transmit[j] =
1578 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1579 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1580 ntohs (msg->header.size),
1581 &send_core_data_multicast, info);
1588 * Core handler for mesh network traffic
1590 * @param cls closure
1591 * @param message message
1592 * @param peer peer identity this notification is about
1593 * @param atsi performance data
1594 * @return GNUNET_OK to keep the connection open,
1595 * GNUNET_SYSERR to close it (signal serious error)
1598 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
1599 const struct GNUNET_MessageHeader *message,
1600 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1602 struct GNUNET_MESH_ToOrigin *msg;
1603 struct GNUNET_PeerIdentity id;
1604 struct MeshTunnel *t;
1605 struct MeshPeerInfo *peer_info;
1608 size = ntohs (message->size);
1610 sizeof (struct GNUNET_MESH_ToOrigin) +
1611 sizeof (struct GNUNET_MessageHeader))
1613 GNUNET_break_op (0);
1616 msg = (struct GNUNET_MESH_ToOrigin *) message;
1617 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1621 /* TODO notify that we dont know this tunnel (whom)? */
1625 if (t->id.oid == myid)
1627 if (NULL == t->client)
1629 /* got data packet for ownerless tunnel */
1630 GNUNET_break_op (0);
1633 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
1637 peer_info = get_peer_info (&msg->oid);
1638 if (NULL == peer_info)
1640 /* unknown origin of tunnel */
1644 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1645 msg = GNUNET_malloc (size);
1646 memcpy (msg, message, size);
1647 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1648 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1649 &send_core_data_raw, msg);
1656 * Core handler for path ACKs
1658 * @param cls closure
1659 * @param message message
1660 * @param peer peer identity this notification is about
1661 * @param atsi performance data
1662 * @return GNUNET_OK to keep the connection open,
1663 * GNUNET_SYSERR to close it (signal serious error)
1666 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
1667 const struct GNUNET_MessageHeader *message,
1668 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1670 struct GNUNET_MESH_PathACK *msg;
1671 struct GNUNET_PeerIdentity id;
1672 struct MeshTunnel *t;
1673 struct MeshPeerInfo *peer_info;
1675 msg = (struct GNUNET_MESH_PathACK *) message;
1676 t = retrieve_tunnel (&msg->oid, msg->tid);
1679 /* TODO notify that we don't know the tunnel */
1683 /* Message for us? */
1684 if (0 == memcmp (&msg->oid, &my_full_id, sizeof(struct GNUNET_PeerIdentity)))
1686 struct GNUNET_MESH_PeerControl pc;
1688 if (NULL == t->client)
1693 peer_info = get_peer_info (&msg->peer_id);
1694 if (NULL == peer_info)
1696 GNUNET_break_op (0);
1699 peer_info->state = MESH_PEER_READY;
1700 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1701 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1702 pc.tunnel_id = htonl (t->local_tid);
1703 GNUNET_PEER_resolve (peer_info->id, &pc.peer);
1704 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1705 &pc.header, GNUNET_NO);
1709 peer_info = get_peer_info (&msg->oid);
1710 if (NULL == peer_info)
1712 /* If we know the tunnel, we should DEFINITELY know the peer */
1716 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1717 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
1718 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
1719 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1720 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1721 sizeof (struct GNUNET_MESH_PathACK),
1722 &send_core_data_raw, msg);
1728 * Functions to handle messages from core
1730 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1731 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
1732 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
1733 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
1734 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
1735 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1736 sizeof (struct GNUNET_MESH_PathACK)},
1742 /******************************************************************************/
1743 /**************** MESH LOCAL HANDLER HELPERS ***********************/
1744 /******************************************************************************/
1747 * delete_tunnel_entry: iterator for deleting each tunnel that belongs to a
1748 * client when the client disconnects.
1749 * @param cls closure (client that is disconnecting)
1750 * @param key the hash of the local tunnel id (used to access the hashmap)
1751 * @param value the value stored at the key (tunnel to destroy)
1752 * @return GNUNET_OK on success
1755 delete_tunnel_entry (void *cls, const GNUNET_HashCode * key, void *value)
1759 r = destroy_tunnel ((struct MeshTunnel *) value);
1765 * deregister_app: iterator for removing each application registered by a client
1766 * @param cls closure
1767 * @param key the hash of the application id (used to access the hashmap)
1768 * @param value the value stored at the key (client)
1769 * @return GNUNET_OK on success
1772 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
1774 GNUNET_CONTAINER_multihashmap_remove(applications, key, value);
1780 * notify_client_connection_failure: notify a client that the connection to the
1781 * requested remote peer is not possible (for instance, no route found)
1782 * Function called when the socket is ready to queue more data. "buf" will be
1783 * NULL and "size" zero if the socket was closed for writing in the meantime.
1785 * @param cls closure
1786 * @param size number of bytes available in buf
1787 * @param buf where the callee should write the message
1788 * @return number of bytes written to buf
1791 notify_client_connection_failure (void *cls, size_t size, void *buf)
1794 struct MeshPeerInfo *peer_info;
1795 struct GNUNET_MESH_PeerControl *msg;
1796 struct GNUNET_PeerIdentity id;
1798 if (0 == size && NULL == buf)
1800 // TODO retry? cancel?
1804 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
1805 peer_info = (struct MeshPeerInfo *) cls;
1806 msg = (struct GNUNET_MESH_PeerControl *) buf;
1807 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1808 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
1809 // msg->tunnel_id = htonl(peer_info->t->tid);
1810 GNUNET_PEER_resolve (peer_info->id, &id);
1811 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
1819 * Send keepalive packets for a peer
1825 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1827 struct MeshPeerInfo *peer_info = cls;
1828 struct GNUNET_PeerIdentity id;
1830 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1832 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1833 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1834 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1835 sizeof (struct GNUNET_MESH_ManipulatePath)
1837 (peer_info->path->length *
1838 sizeof (struct GNUNET_PeerIdentity)),
1839 &send_core_create_path_for_peer,
1841 peer_info->path_refresh_task =
1842 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh,
1849 * Function to process paths received for a new peer addition. The recorded
1850 * paths form the initial tunnel, which can be optimized later.
1851 * Called on each result obtained for the DHT search.
1853 * @param cls closure
1854 * @param exp when will this value expire
1855 * @param key key of the result
1856 * @param get_path NULL-terminated array of pointers
1857 * to the peers on reverse GET path (or NULL if not recorded)
1858 * @param put_path NULL-terminated array of pointers
1859 * to the peers on the PUT path (or NULL if not recorded)
1860 * @param type type of the result
1861 * @param size number of bytes in data
1862 * @param data pointer to the result data
1865 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1866 const GNUNET_HashCode * key,
1867 const struct GNUNET_PeerIdentity *const *get_path,
1868 const struct GNUNET_PeerIdentity *const *put_path,
1869 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
1871 struct MeshPeerInfo *peer_info = cls;
1873 struct GNUNET_PeerIdentity pi;
1876 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path)
1878 // Find ourselves some alternate initial path to the destination: retry
1879 GNUNET_DHT_get_stop (peer_info->dhtget);
1880 GNUNET_PEER_resolve (peer_info->id, &pi);
1881 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1882 GNUNET_TIME_UNIT_FOREVER_REL,
1883 GNUNET_BLOCK_TYPE_TEST, /* type */
1884 &pi.hashPubKey, /*key to search */
1885 4, /* replication level */
1886 GNUNET_DHT_RO_RECORD_ROUTE,
1887 NULL, /* bloom filter */
1890 0, /* xquery bits */
1892 (void *) peer_info);
1895 p = GNUNET_malloc (sizeof (struct MeshPath));
1896 for (i = 0; get_path[i] != NULL; i++) ;
1897 for (i--; i >= 0; i--)
1900 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1901 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1904 for (i = 0; put_path[i] != NULL; i++) ;
1905 for (i--; i >= 0; i--)
1908 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1909 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
1912 add_path_to_peer (peer_info, p);
1913 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1914 GNUNET_TIME_UNIT_FOREVER_REL, get_path[1],
1915 sizeof (struct GNUNET_MESH_ManipulatePath)
1918 sizeof (struct GNUNET_PeerIdentity)),
1919 &send_core_create_path_for_peer,
1921 if (0 == peer_info->path_refresh_task)
1923 peer_info->path_refresh_task =
1924 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh,
1932 * Function to process paths received for a new peer addition. The recorded
1933 * paths form the initial tunnel, which can be optimized later.
1934 * Called on each result obtained for the DHT search.
1936 * @param cls closure
1937 * @param exp when will this value expire
1938 * @param key key of the result
1939 * @param get_path NULL-terminated array of pointers
1940 * to the peers on reverse GET path (or NULL if not recorded)
1941 * @param put_path NULL-terminated array of pointers
1942 * to the peers on the PUT path (or NULL if not recorded)
1943 * @param type type of the result
1944 * @param size number of bytes in data
1945 * @param data pointer to the result data
1948 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1949 const GNUNET_HashCode * key,
1950 const struct GNUNET_PeerIdentity *const *get_path,
1951 const struct GNUNET_PeerIdentity *const *put_path,
1952 enum GNUNET_BLOCK_Type type, size_t size,
1955 const struct GNUNET_PeerIdentity *pi = data;
1956 struct MeshTunnel *t = cls;
1957 struct MeshPeerInfo *peer_info;
1962 if (size != sizeof (struct GNUNET_PeerIdentity))
1964 GNUNET_break_op (0);
1967 peer_info = get_peer_info (pi);
1968 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
1969 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1970 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path)
1972 /* we don't have a route to the peer, let's try a direct lookup */
1973 if (NULL == peer_info->dhtget)
1975 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1976 GNUNET_TIME_UNIT_FOREVER_REL,
1977 GNUNET_BLOCK_TYPE_TEST,
1979 10U, /* replication level */
1980 GNUNET_DHT_RO_RECORD_ROUTE,
1981 NULL, /* bloom filter */
1984 0, /* xquery bits */
1985 dht_get_id_handler, peer_info);
1989 p = GNUNET_malloc (sizeof (struct MeshPath));
1990 for (i = 0; get_path[i] != NULL; i++) ;
1991 for (i--; i >= 0; i--)
1994 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1995 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1998 for (i = 0; put_path[i] != NULL; i++) ;
1999 for (i--; i >= 0; i--)
2002 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
2003 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
2006 add_path_to_peer (peer_info, p);
2007 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2008 GNUNET_TIME_UNIT_FOREVER_REL, get_path[1],
2009 sizeof (struct GNUNET_MESH_ManipulatePath)
2012 sizeof (struct GNUNET_PeerIdentity)),
2013 &send_core_create_path_for_peer,
2018 /******************************************************************************/
2019 /********************* MESH LOCAL HANDLES **************************/
2020 /******************************************************************************/
2024 * Handler for client disconnection
2026 * @param cls closure
2027 * @param client identification of the client; NULL
2028 * for the last call when the server is destroyed
2031 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2033 struct MeshClient *c;
2034 struct MeshClient *next;
2036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2040 if (c->handle != client)
2042 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
2047 if (NULL != c->tunnels)
2049 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
2050 &delete_tunnel_entry,
2052 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2055 /* deregister clients applications */
2056 if (NULL != c->apps)
2058 GNUNET_CONTAINER_multihashmap_iterate(c->apps, &deregister_app, NULL);
2059 GNUNET_CONTAINER_multihashmap_destroy(c->apps);
2061 if (0 == GNUNET_CONTAINER_multihashmap_size(applications))
2063 GNUNET_SCHEDULER_cancel (announce_applications_task);
2065 if (NULL != c->types)
2066 GNUNET_CONTAINER_multihashmap_destroy(c->types);
2067 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2079 * Handler for new clients
2081 * @param cls closure
2082 * @param client identification of the client
2083 * @param message the actual message, which includes messages the client wants
2086 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2087 const struct GNUNET_MessageHeader *message)
2089 struct GNUNET_MESH_ClientConnect *cc_msg;
2090 struct MeshClient *c;
2091 GNUNET_MESH_ApplicationType *a;
2098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2099 /* Check data sanity */
2100 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2101 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2102 ntypes = ntohs (cc_msg->types);
2103 napps = ntohs (cc_msg->applications);
2105 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
2108 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2112 /* Create new client structure */
2113 c = GNUNET_malloc (sizeof (struct MeshClient));
2115 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
2118 GNUNET_MESH_ApplicationType at;
2121 c->apps = GNUNET_CONTAINER_multihashmap_create(napps);
2122 for (i = 0; i < napps; i++)
2125 GNUNET_CRYPTO_hash(&at, sizeof(at), &hc);
2126 /* store in clients hashmap */
2127 GNUNET_CONTAINER_multihashmap_put(
2131 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2132 /* store in global hashmap, for announcements */
2133 GNUNET_CONTAINER_multihashmap_put(
2137 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2139 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2140 announce_applications_task = GNUNET_SCHEDULER_add_now (
2141 &announce_applications, NULL);
2149 t = (uint16_t *) &a[napps];
2150 c->types = GNUNET_CONTAINER_multihashmap_create(ntypes);
2151 for (i =0; i < ntypes; i++)
2154 GNUNET_CRYPTO_hash(&u16, sizeof(u16), &hc);
2155 /* store in clients hashmap */
2156 GNUNET_CONTAINER_multihashmap_put(
2160 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2161 /* store in global hashmap */
2162 GNUNET_CONTAINER_multihashmap_put(
2166 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
2169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2170 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
2172 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2173 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2174 GNUNET_SERVER_notification_context_add (nc, client);
2176 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2182 * Handler for requests of new tunnels
2184 * @param cls closure
2185 * @param client identification of the client
2186 * @param message the actual message
2189 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2190 const struct GNUNET_MessageHeader *message)
2192 struct GNUNET_MESH_TunnelMessage *t_msg;
2193 struct MeshTunnel *t;
2194 struct MeshClient *c;
2195 GNUNET_HashCode hash;
2197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2199 /* Sanity check for client registration */
2200 if (NULL == (c = retrieve_client (client)))
2203 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2207 /* Message sanity check */
2208 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2211 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2215 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2216 /* Sanity check for tunnel numbering */
2217 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2220 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2223 /* Sanity check for duplicate tunnel IDs */
2224 if (NULL != retrieve_tunnel_by_local_id (c, ntohl (t_msg->tunnel_id)))
2227 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2231 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2232 while (NULL != retrieve_tunnel_by_pi (myid, next_tid))
2233 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2234 t->id.tid = next_tid++;
2236 t->local_tid = ntohl (t_msg->tunnel_id);
2238 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2240 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2242 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2243 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2246 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2250 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2252 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2253 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2256 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2260 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2266 * Handler for requests of deleting tunnels
2268 * @param cls closure
2269 * @param client identification of the client
2270 * @param message the actual message
2273 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2274 const struct GNUNET_MessageHeader *message)
2276 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2277 struct MeshClient *c;
2278 struct MeshTunnel *t;
2279 MESH_TunnelNumber tid;
2280 GNUNET_HashCode hash;
2282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2284 /* Sanity check for client registration */
2285 if (NULL == (c = retrieve_client (client)))
2288 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2291 /* Message sanity check */
2292 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2295 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2299 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2301 /* Retrieve tunnel */
2302 tid = ntohl (tunnel_msg->tunnel_id);
2304 /* Remove from local id hashmap */
2305 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2306 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2307 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2309 /* Remove from global id hashmap */
2310 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2311 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2313 // notify_tunnel_destroy(t);
2314 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2320 * Handler for connection requests to new peers
2322 * @param cls closure
2323 * @param client identification of the client
2324 * @param message the actual message (PeerControl)
2327 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2328 const struct GNUNET_MessageHeader *message)
2330 struct GNUNET_MESH_PeerControl *peer_msg;
2331 struct MeshClient *c;
2332 struct MeshTunnel *t;
2333 MESH_TunnelNumber tid;
2334 struct MeshPeerInfo *peer_info;
2337 /* Sanity check for client registration */
2338 if (NULL == (c = retrieve_client (client)))
2341 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2345 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2346 /* Sanity check for message size */
2347 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2350 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2354 /* Tunnel exists? */
2355 tid = ntohl (peer_msg->tunnel_id);
2356 t = retrieve_tunnel_by_local_id (c, tid);
2360 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2364 /* Does client own tunnel? */
2365 if (t->client->handle != client)
2368 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2373 peer_info = get_peer_info (&peer_msg->peer);
2375 /* Start DHT search if needed */
2376 if (MESH_PEER_READY != peer_info->state && NULL == peer_info->dhtget)
2378 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
2379 GNUNET_BLOCK_TYPE_TEST,
2380 &peer_msg->peer.hashPubKey, 4, /* replication level */
2381 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2384 0, /* xquery bits */
2386 (void *) peer_info);
2389 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2395 * Handler for disconnection requests of peers in a tunnel
2397 * @param cls closure
2398 * @param client identification of the client
2399 * @param message the actual message (PeerControl)
2402 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2403 const struct GNUNET_MessageHeader *message)
2405 struct GNUNET_MESH_PeerControl *peer_msg;
2406 struct MeshClient *c;
2407 struct MeshTunnel *t;
2408 MESH_TunnelNumber tid;
2410 /* Sanity check for client registration */
2411 if (NULL == (c = retrieve_client (client)))
2414 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2417 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2418 /* Sanity check for message size */
2419 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2422 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2426 /* Tunnel exists? */
2427 tid = ntohl (peer_msg->tunnel_id);
2428 t = retrieve_tunnel_by_local_id (c, tid);
2432 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2436 /* Does client own tunnel? */
2437 if (t->client->handle != client)
2440 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2444 /* Ok, delete peer from tunnel */
2445 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2446 &peer_msg->peer.hashPubKey);
2448 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2454 * Handler for connection requests to new peers by type
2456 * @param cls closure
2457 * @param client identification of the client
2458 * @param message the actual message (ConnectPeerByType)
2461 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2462 const struct GNUNET_MessageHeader *message)
2464 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2465 struct MeshClient *c;
2466 struct MeshTunnel *t;
2467 GNUNET_HashCode hash;
2468 GNUNET_MESH_ApplicationType type;
2469 MESH_TunnelNumber tid;
2471 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
2472 /* Sanity check for client registration */
2473 if (NULL == (c = retrieve_client (client)))
2476 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2480 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2481 /* Sanity check for message size */
2482 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
2483 ntohs (connect_msg->header.size))
2486 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2490 /* Tunnel exists? */
2491 tid = ntohl (connect_msg->tunnel_id);
2492 t = retrieve_tunnel_by_local_id (c, tid);
2496 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2500 /* Does client own tunnel? */
2501 if (t->client->handle != client)
2504 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2508 /* Do WE have the service? */
2509 type = ntohl (connect_msg->type);
2510 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", type);
2511 GNUNET_CRYPTO_hash (&type, sizeof (GNUNET_MESH_ApplicationType), &hash);
2512 if (GNUNET_CONTAINER_multihashmap_contains(applications, &hash) == GNUNET_YES)
2514 /* Yes! Fast forward, add ourselves to the tunnel and send the
2515 * good news to the client
2517 struct GNUNET_MESH_PeerControl pc;
2519 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
2520 pc.peer = my_full_id;
2521 GNUNET_CONTAINER_multihashmap_put (t->peers, &pc.peer.hashPubKey,
2522 get_peer_info (&pc.peer),
2523 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2524 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2525 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2526 pc.tunnel_id = htonl (t->local_tid);
2527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
2528 GNUNET_SERVER_notification_context_unicast (nc, /* context */
2530 &pc.header, /* msg */
2531 GNUNET_NO); /* can drop? */
2532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
2533 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2536 /* Ok, lets find a peer offering the service */
2537 if (c->dht_get_type)
2539 GNUNET_DHT_get_stop (c->dht_get_type);
2541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2542 "MESH: looking in DHT for %s\n",
2543 GNUNET_h2s_full(&hash));
2545 GNUNET_DHT_get_start (dht_handle,
2546 GNUNET_TIME_UNIT_FOREVER_REL,
2547 GNUNET_BLOCK_TYPE_TEST,
2550 GNUNET_DHT_RO_RECORD_ROUTE,
2555 &dht_get_type_handler,
2558 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2564 * Handler for client traffic directed to one peer
2566 * @param cls closure
2567 * @param client identification of the client
2568 * @param message the actual message
2571 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
2572 const struct GNUNET_MessageHeader *message)
2574 struct MeshClient *c;
2575 struct MeshTunnel *t;
2576 struct MeshPeerInfo *pi;
2577 struct GNUNET_MESH_Unicast *data_msg;
2578 struct GNUNET_PeerIdentity next_hop;
2579 struct MeshDataDescriptor *info;
2580 MESH_TunnelNumber tid;
2583 /* Sanity check for client registration */
2584 if (NULL == (c = retrieve_client (client)))
2587 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2590 data_msg = (struct GNUNET_MESH_Unicast *) message;
2591 /* Sanity check for message size */
2592 if (sizeof (struct GNUNET_MESH_Unicast) +
2593 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
2596 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2600 /* Tunnel exists? */
2601 tid = ntohl (data_msg->tid);
2602 t = retrieve_tunnel_by_local_id (c, tid);
2606 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2610 /* Is it a local tunnel? Then, does client own the tunnel? */
2611 if (t->client->handle != NULL && t->client->handle != client)
2614 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2618 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2619 &data_msg->destination.hashPubKey);
2620 /* Is the selected peer in the tunnel? */
2624 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2629 struct GNUNET_MESH_Unicast copy;
2631 /* Work around const limitation */
2632 memcpy (©, data_msg, sizeof (struct GNUNET_MESH_Unicast));
2633 copy.oid = my_full_id;
2634 copy.tid = htonl(t->id.tid);
2635 handle_mesh_data_unicast (NULL, &my_full_id, ©.header, NULL);
2638 GNUNET_PEER_resolve (get_first_hop (pi->path), &next_hop);
2639 data_size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Unicast);
2640 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + data_size);
2641 memcpy (&info[1], &data_msg[1], data_size);
2642 info->destination = pi->id;
2643 info->origin = &t->id;
2644 info->size = data_size;
2645 info->client = client;
2646 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2647 GNUNET_TIME_UNIT_FOREVER_REL, &next_hop,
2648 /* FIXME re-check types */
2650 sizeof (struct GNUNET_MESH_Unicast),
2651 &send_core_data_unicast, info);
2656 * Handler for client traffic directed to all peers in a tunnel
2658 * @param cls closure
2659 * @param client identification of the client
2660 * @param message the actual message
2663 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
2664 const struct GNUNET_MessageHeader *message)
2666 struct MeshClient *c;
2667 struct MeshTunnel *t;
2668 struct GNUNET_MESH_Multicast *data_msg;
2669 MESH_TunnelNumber tid;
2671 /* Sanity check for client registration */
2672 if (NULL == (c = retrieve_client (client)))
2675 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2678 data_msg = (struct GNUNET_MESH_Multicast *) message;
2679 /* Sanity check for message size */
2680 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
2683 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2687 /* Tunnel exists? */
2688 tid = ntohl (data_msg->tid);
2689 t = retrieve_tunnel_by_local_id (c, tid);
2693 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2697 /* Does client own tunnel? */
2698 if (t->client->handle != client)
2701 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2707 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2712 * Functions to handle messages from clients
2714 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
2715 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
2716 {&handle_local_tunnel_create, NULL,
2717 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
2718 sizeof (struct GNUNET_MESH_TunnelMessage)},
2719 {&handle_local_tunnel_destroy, NULL,
2720 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
2721 sizeof (struct GNUNET_MESH_TunnelMessage)},
2722 {&handle_local_connect_add, NULL,
2723 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
2724 sizeof (struct GNUNET_MESH_PeerControl)},
2725 {&handle_local_connect_del, NULL,
2726 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
2727 sizeof (struct GNUNET_MESH_PeerControl)},
2728 {&handle_local_connect_by_type, NULL,
2729 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
2730 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
2731 {&handle_local_unicast, NULL,
2732 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2733 {&handle_local_unicast, NULL,
2734 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2735 {&handle_local_multicast, NULL,
2736 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2742 * To be called on core init/fail.
2744 * @param cls service closure
2745 * @param server handle to the server for this service
2746 * @param identity the public identity of this peer
2747 * @param publicKey the public key of this peer
2750 core_init (void *cls, struct GNUNET_CORE_Handle *server,
2751 const struct GNUNET_PeerIdentity *identity,
2752 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
2754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
2755 core_handle = server;
2756 my_full_id = *identity;
2757 myid = GNUNET_PEER_intern (identity);
2758 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
2763 * Method called whenever a given peer connects.
2765 * @param cls closure
2766 * @param peer peer identity this notification is about
2767 * @param atsi performance data for the connection
2770 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
2771 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2773 // GNUNET_PEER_Id pid;
2774 struct MeshPeerInfo *peer_info;
2775 struct MeshPath *path;
2777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
2778 peer_info = get_peer_info (peer);
2779 if (myid == peer_info->id)
2781 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
2783 path = GNUNET_malloc (sizeof (struct MeshPath));
2785 path->peers = GNUNET_malloc (sizeof (GNUNET_PEER_Id) * 2);
2786 path->peers[0] = myid;
2787 path->peers[1] = peer_info->id;
2788 add_path_to_peer (peer_info, path);
2793 * Method called whenever a peer disconnects.
2795 * @param cls closure
2796 * @param peer peer identity this notification is about
2799 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
2801 struct MeshPeerInfo *pi;
2804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
2805 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2811 for (i = 0; i < CORE_QUEUE_SIZE; i++)
2813 if (pi->core_transmit[i])
2815 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
2816 /* TODO: notify that tranmission has failed */
2817 GNUNET_free (pi->infos[i]);
2822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
2828 /******************************************************************************/
2829 /************************ MAIN FUNCTIONS ****************************/
2830 /******************************************************************************/
2833 * Task run during shutdown.
2839 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
2842 if (core_handle != NULL)
2844 GNUNET_CORE_disconnect (core_handle);
2847 if (dht_handle != NULL)
2849 GNUNET_DHT_disconnect (dht_handle);
2854 GNUNET_SERVER_notification_context_destroy (nc);
2857 if (0 != announce_id_task)
2859 GNUNET_SCHEDULER_cancel (announce_id_task);
2860 announce_id_task = 0;
2862 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
2866 * Process mesh requests.
2868 * @param cls closure
2869 * @param server the initialized server
2870 * @param c configuration to use
2873 run (void *cls, struct GNUNET_SERVER_Handle *server,
2874 const struct GNUNET_CONFIGURATION_Handle *c)
2876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
2877 GNUNET_SERVER_add_handlers (server, plugin_handlers);
2878 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
2879 server_handle = server;
2880 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
2881 CORE_QUEUE_SIZE, /* queue size */
2882 NULL, /* Closure passed to MESH functions */
2883 &core_init, /* Call core_init once connected */
2884 &core_connect, /* Handle connects */
2885 &core_disconnect, /* remove peers on disconnects */
2886 NULL, /* Do we care about "status" updates? */
2887 NULL, /* Don't notify about all incoming messages */
2888 GNUNET_NO, /* For header only in notification */
2889 NULL, /* Don't notify about all outbound messages */
2890 GNUNET_NO, /* For header-only out notification */
2891 core_handlers); /* Register these handlers */
2892 if (core_handle == NULL)
2896 dht_handle = GNUNET_DHT_connect (c, 64);
2897 if (dht_handle == NULL)
2899 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Error connecting to DHT.\
2900 Running without DHT has a severe\
2901 impact in MESH capabilities.\n\
2902 Plase check your configuretion and enable DHT.\n");
2908 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2909 peers = GNUNET_CONTAINER_multihashmap_create (32);
2910 applications = GNUNET_CONTAINER_multihashmap_create (32);
2911 types = GNUNET_CONTAINER_multihashmap_create (32);
2912 nc = GNUNET_SERVER_notification_context_create (server_handle,
2915 clients_tail = NULL;
2917 announce_applications_task = 0;
2919 /* Scheduled the task to clean up when shutdown is called */
2920 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
2923 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
2927 * The main function for the mesh service.
2929 * @param argc number of arguments from the command line
2930 * @param argv command line arguments
2931 * @return 0 ok, 1 on error
2934 main (int argc, char *const *argv)
2938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
2941 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
2943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");