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
65 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
69 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
73 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s", s);
77 #define CORE_QUEUE_SIZE 10
78 #define LOCAL_QUEUE_SIZE 100
79 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
80 GNUNET_TIME_UNIT_SECONDS,\
82 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
83 GNUNET_TIME_UNIT_SECONDS,\
86 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
87 GNUNET_TIME_UNIT_SECONDS,\
92 /******************************************************************************/
93 /************************ DATA STRUCTURES ****************************/
94 /******************************************************************************/
97 * Information regarding a path
105 struct MeshPath *next;
106 struct MeshPath *prev;
109 * Whether the path is serving traffic in a tunnel or is a backup
114 * List of all the peers that form the path from origin to target
116 GNUNET_PEER_Id *peers;
119 * Number of peers (hops) in the path
126 * All the states a peer participating in a tunnel can be in.
131 * Path to the peer not known yet
136 * Request sent, not yet answered.
141 * Peer connected and ready to accept data
146 * Peer connected previosly but not responding
148 MESH_PEER_RECONNECTING
152 /** FWD declaration */
156 * Struct containing all info possibly needed to build a package when called
159 struct MeshDataDescriptor
161 /** ID of the tunnel this packet travels in */
162 struct MESH_TunnelID *origin;
164 /** Ultimate destination of the packet */
165 GNUNET_PEER_Id destination;
167 /** Number of identical messages sent to different hops (multicast) */
170 /** Size of the data */
173 /** Client that asked for the transmission, if any */
174 struct GNUNET_SERVER_Client *client;
176 /** Who was is message being sent to */
177 struct MeshPeerInfo *peer;
179 /** Which handler was used to request the transmission */
180 unsigned int handler_n;
182 /* Data at the end */
187 * Struct containing all information regarding a given peer
197 * Is the peer reachable? Is the peer even connected?
199 enum MeshPeerState state;
202 * Last time we heard from this peer
204 struct GNUNET_TIME_Absolute last_contact;
207 * Number of attempts to reconnect so far
209 int n_reconnect_attempts;
212 * Paths to reach the peer
214 struct MeshPath *path;
215 struct MeshPath *path_tail;
218 * Handle to stop the DHT search for a path to this peer
220 struct GNUNET_DHT_GetHandle *dhtget;
223 * Handles to stop queued transmissions for this peer
225 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
228 * Pointer to info stuctures used as cls for queued transmissions
230 struct MeshDataDescriptor *infos[CORE_QUEUE_SIZE];
233 * Task to send keepalive packets over the current active path
235 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
240 * Data scheduled to transmit (to local client or remote peer)
247 struct MeshQueue *next;
248 struct MeshQueue *prev;
251 * Target of the data (NULL if target is client)
253 struct MeshPeerInfo *peer;
256 * Client to send the data to (NULL if target is peer)
258 struct MeshClient *client;
261 * Size of the message to transmit
266 * How old is the data?
268 struct GNUNET_TIME_Absolute timestamp;
273 struct GNUNET_MessageHeader *data;
277 * Globally unique tunnel identification (owner + number)
278 * DO NOT USE OVER THE NETWORK
283 * Node that owns the tunnel
288 * Tunnel number to differentiate all the tunnels owned by the node oid
289 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
291 MESH_TunnelNumber tid;
295 struct MeshClient; /* FWD declaration */
298 * Struct containing all information regarding a tunnel
299 * For an intermediate node the improtant info used will be:
300 * - id Tunnel unique identification
301 * - paths[0] To know where to send it next
302 * - metainfo: ready, speeds, accounting
309 struct MESH_TunnelID id;
312 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
314 MESH_TunnelNumber local_tid;
317 * Last time the tunnel was used
319 struct GNUNET_TIME_Absolute timestamp;
322 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
324 struct GNUNET_CONTAINER_MultiHashMap *peers;
327 * Number of peers that are connected and potentially ready to receive data
329 unsigned int peers_ready;
332 * Number of peers that have been added to the tunnel
334 unsigned int peers_total;
338 * Client owner of the tunnel, if any
340 struct MeshClient *client;
343 * Messages ready to transmit
345 struct MeshQueue *queue_head;
346 struct MeshQueue *queue_tail;
351 * Struct containing information about a client of the service
358 struct MeshClient *next;
359 struct MeshClient *prev;
362 * Tunnels that belong to this client, indexed by local id
364 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
367 * Handle to communicate with the client
369 struct GNUNET_SERVER_Client *handle;
372 * Applications that this client has claimed to provide
374 GNUNET_MESH_ApplicationType *apps;
375 unsigned int app_counter;
378 * Messages that this client has declared interest in
381 unsigned int type_counter;
384 * Used for seachching peers offering a service
386 struct GNUNET_DHT_GetHandle *dht_get_type;
390 /******************************************************************************/
391 /*********************** GLOBAL VARIABLES ****************************/
392 /******************************************************************************/
397 static struct MeshClient *clients;
398 static struct MeshClient *clients_tail;
401 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
403 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
406 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
408 static struct GNUNET_CONTAINER_MultiHashMap *peers;
411 * Handle to communicate with core
413 static struct GNUNET_CORE_Handle *core_handle;
418 static struct GNUNET_DHT_Handle *dht_handle;
423 static struct GNUNET_SERVER_Handle *server_handle;
426 * Notification context, to send messages to local clients
428 static struct GNUNET_SERVER_NotificationContext *nc;
431 * Local peer own ID (memory efficient handle)
433 static GNUNET_PEER_Id myid;
436 * Tunnel ID for the next created tunnel (global tunnel number)
438 static MESH_TunnelNumber next_tid;
441 * All application types provided by this peer
443 static GNUNET_MESH_ApplicationType *applications;
446 * All application types provided by this peer (reference counter)
448 static unsigned int *applications_rc;
451 * Number of applications provided by this peer
453 static unsigned int n_applications;
456 * Task to periodically announce provided applications
458 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
461 * Task to periodically announce itself in the network
463 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
466 /******************************************************************************/
467 /****************** GENERAL HELPER FUNCTIONS ************************/
468 /******************************************************************************/
471 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
472 * and inster it in the appropiate structures if the peer is not known yet.
473 * @param peer Identity of the peer
474 * @return Existing or newly created peer info
476 static struct MeshPeerInfo *
477 get_peer_info (const struct GNUNET_PeerIdentity *peer)
479 struct MeshPeerInfo *peer_info;
481 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
482 if (NULL == peer_info)
485 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
486 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
487 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
488 peer_info->id = GNUNET_PEER_intern (peer);
489 peer_info->state = MESH_PEER_SEARCHING;
496 * Find the first peer whom to send a packet to go down this path
497 * @param path The path to use
498 * @return short id of the next peer, myid in case of local delivery,
499 * or 0 in case of error
501 static GNUNET_PEER_Id
502 get_first_hop (struct MeshPath *path)
514 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
515 "tried to get the next hop from an invalid path\n");
519 for (i = 0; i < path->length; i++)
521 if (path->peers[i] == myid)
523 if (i < path->length - 1)
525 return path->peers[i + 1];
538 * Get the cost of the path.
539 * @param path The path to analyze
540 * @return Number of hops to reach destination, UINT_MAX in case the peer is not
544 get_path_cost (struct MeshPath *path)
550 for (i = 0; i < path->length; i++)
552 if (path->peers[i] == myid)
554 return path->length - i;
562 * Add the path to the peer and update the path used to reach it in case this
564 * @param peer_info Destination peer to add the path to.
565 * @param path New path to add. Last peer must be the peer in arg 1.
568 add_path_to_peer (struct MeshPeerInfo *peer_info, struct MeshPath *path)
571 unsigned int new_cost;
572 unsigned int best_cost;
573 struct MeshPath *aux;
574 struct MeshPath *best;
576 if (NULL == peer_info || NULL == path)
579 new_cost = get_path_cost (path);
580 best_cost = UINT_MAX;
582 for (aux = peer_info->path; aux != NULL; aux = aux->next)
584 if ((i = get_path_cost (aux)) < best_cost)
590 if (best_cost < new_cost)
593 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path, peer_info->path_tail,
601 GNUNET_CONTAINER_DLL_insert (peer_info->path, peer_info->path_tail, path);
608 * Add the path to the peer and update the path used to reach it in case this
609 * is the shortest. The path is given in reverse, the destination peer is
610 * path[0]. The function modifies the path, inverting it to use the origin as
612 * @param peer_info Destination peer to add the path to.
613 * @param path New path to add. First peer must be the peer in arg 1.
616 add_path_to_origin (struct MeshPeerInfo *peer_info, struct MeshPath *path)
621 for (i = 0; i < path->length / 2; i++)
623 aux = path->peers[i];
624 path->peers[i] = path->peers[path->length - i - 1];
625 path->peers[path->length - i - 1] = aux;
627 add_path_to_peer (peer_info, path);
632 * Check if client has registered with the service and has not disconnected
633 * @param client the client to check
634 * @return non-NULL if client exists in the global DLL
636 static struct MeshClient *
637 retrieve_client (struct GNUNET_SERVER_Client *client)
639 struct MeshClient *c;
644 if (c->handle == client)
653 * Checks if a given client has subscribed to certain message type
654 * @param message_type Type of message to check
655 * @param c Client to check
656 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
658 static int /* FIXME inline? */
659 is_client_subscribed (uint16_t message_type, struct MeshClient *c)
663 for (i = 0; i < c->type_counter; i++)
665 if (c->types[i] == message_type)
673 * Search for a tunnel among the tunnels for a client
674 * @param client the client whose tunnels to search in
675 * @param tid the local id of the tunnel
676 * @return tunnel handler, NULL if doesn't exist
678 static struct MeshTunnel *
679 retrieve_tunnel_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
681 GNUNET_HashCode hash;
683 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
684 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
688 * Search for a tunnel by global ID using PEER_ID
689 * @param pi owner of the tunnel
690 * @param tid global tunnel number
691 * @return tunnel handler, NULL if doesn't exist
693 static struct MeshTunnel *
694 retrieve_tunnel_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
696 struct MESH_TunnelID id;
697 GNUNET_HashCode hash;
702 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
703 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
709 * Search for a tunnel by global ID using full PeerIdentities
710 * @param oid owner of the tunnel
711 * @param tid global tunnel number
712 * @return tunnel handler, NULL if doesn't exist
714 static struct MeshTunnel *
715 retrieve_tunnel (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
717 return retrieve_tunnel_by_pi (GNUNET_PEER_search (oid), tid);
722 * Destroy the path and free any allocated resources linked to it
723 * @param t tunnel the path belongs to
724 * @param p the path to destroy
725 * @return GNUNET_OK on success
728 destroy_path (struct MeshPath *p)
730 GNUNET_PEER_decrement_rcs (p->peers, p->length);
731 GNUNET_free (p->peers);
738 * Destroy the peer_info and free any allocated resources linked to it
739 * @param t tunnel the path belongs to
740 * @param pi the peer_info to destroy
741 * @return GNUNET_OK on success
744 destroy_peer_info (struct MeshPeerInfo *pi)
746 GNUNET_HashCode hash;
747 struct GNUNET_PeerIdentity id;
749 GNUNET_PEER_resolve (pi->id, &id);
750 GNUNET_PEER_change_rc (pi->id, -1);
751 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
753 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
754 GNUNET_SCHEDULER_cancel (pi->path_refresh_task);
762 * Destroy the tunnel and free any allocated resources linked to it
763 * @param c client the tunnel belongs to
764 * @param t the tunnel to destroy
765 * @return GNUNET_OK on success
768 destroy_tunnel (struct MeshTunnel *t)
770 struct MeshClient *c;
771 GNUNET_HashCode hash;
779 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
780 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
785 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
786 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
794 /******************************************************************************/
795 /************************ PERIODIC FUNCTIONS ****************************/
796 /******************************************************************************/
799 * Periodically announce what applications are provided by local clients
802 * @param tc task context
805 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
807 struct GNUNET_PeerIdentity id;
808 GNUNET_HashCode hash;
809 uint8_t buffer[12] = "MESH_APP";
813 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
815 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
818 p = (unsigned int *) &buffer[8];
819 GNUNET_PEER_resolve (myid, &id);
820 for (i = 0; i < n_applications; i++)
822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for app %d\n",
824 *p = htonl (applications[i]);
825 GNUNET_CRYPTO_hash (buffer, 12, &hash);
826 GNUNET_DHT_put (dht_handle, &hash, 10U, GNUNET_DHT_RO_RECORD_ROUTE,
827 GNUNET_BLOCK_TYPE_ANY, sizeof (struct GNUNET_PeerIdentity),
829 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
833 &mesh_debug, "MESH: DHT_put for app completed\n");
838 announce_applications_task =
839 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
846 * Periodically announce self id in the DHT
849 * @param tc task context
852 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
854 struct GNUNET_PeerIdentity id;
856 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
858 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
861 GNUNET_PEER_resolve (myid, &id);
863 * - Set data expiration in function of X
866 GNUNET_DHT_put (dht_handle, /* DHT handle */
867 &id.hashPubKey, /* Key to use */
868 10U, /* Replication level */
869 GNUNET_DHT_RO_RECORD_ROUTE, /* DHT options */
870 GNUNET_BLOCK_TYPE_ANY, /* Block type */
871 0, /* Size of the data */
872 NULL, /* Data itself */
873 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
874 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
876 &mesh_debug, "DHT_put for id completed\n");
878 NULL, /* Continuation */
879 NULL); /* Continuation closure */
882 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
885 /******************************************************************************/
886 /**************** MESH NETWORK HANDLER HELPERS ***********************/
887 /******************************************************************************/
890 * Function called to notify a client about the socket
891 * being ready to queue more data. "buf" will be
892 * NULL and "size" zero if the socket was closed for
893 * writing in the meantime.
896 * @param size number of bytes available in buf
897 * @param buf where the callee should write the message
898 * @return number of bytes written to buf
901 send_core_create_path_for_peer (void *cls, size_t size, void *buf)
903 struct MeshPeerInfo *peer_info = cls;
904 struct GNUNET_MESH_ManipulatePath *msg;
906 struct GNUNET_PeerIdentity *peer_ptr;
907 struct GNUNET_PeerIdentity id;
911 if (0 == size && NULL == buf)
913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting create path\n");
914 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
915 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
916 GNUNET_TIME_UNIT_FOREVER_REL, &id,
918 GNUNET_MESH_ManipulatePath) +
919 (peer_info->path->length *
920 sizeof (struct GNUNET_PeerIdentity)),
921 &send_core_create_path_for_peer,
935 return 0; // TODO Notify ERROR Path not found
938 sizeof (struct GNUNET_MESH_ManipulatePath) +
939 p->length * sizeof (struct GNUNET_PeerIdentity);
940 if (size < size_needed)
942 // TODO retry? cancel?
946 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
947 msg->header.size = htons (size_needed);
948 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
950 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
951 for (i = 0; i < p->length; i++)
953 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
956 peer_info->state = MESH_PEER_WAITING;
964 * Function called to notify a client about the socket
965 * being ready to queue more data. "buf" will be
966 * NULL and "size" zero if the socket was closed for
967 * writing in the meantime.
969 * @param cls closure (MeshDataDescriptor with all info to build packet)
970 * @param size number of bytes available in buf
971 * @param buf where the callee should write the message
972 * @return number of bytes written to buf
975 send_core_data_to_origin (void *cls, size_t size, void *buf)
977 struct MeshDataDescriptor *info = cls;
978 struct GNUNET_MESH_ToOrigin *msg = buf;
981 GNUNET_assert (NULL != info);
982 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
983 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
985 if (total_size > size)
987 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
988 "not enough buffer to send data to origin\n");
991 msg->header.size = htons (total_size);
992 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
993 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
994 msg->tid = htonl (info->origin->tid);
997 memcpy (&msg[1], &info[1], info->size);
999 if (NULL != info->client)
1001 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1009 * Function called to notify a client about the socket
1010 * being ready to queue more data. "buf" will be
1011 * NULL and "size" zero if the socket was closed for
1012 * writing in the meantime.
1014 * @param cls closure (data itself)
1015 * @param size number of bytes available in buf
1016 * @param buf where the callee should write the message
1017 * @return number of bytes written to buf
1020 send_core_data_unicast (void *cls, size_t size, void *buf)
1022 struct MeshDataDescriptor *info = cls;
1023 struct GNUNET_MESH_Unicast *msg = buf;
1026 GNUNET_assert (NULL != info);
1027 total_size = sizeof (struct GNUNET_MESH_Unicast) + info->size;
1028 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1030 if (total_size > size)
1032 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1033 "not enough buffer to send data to peer\n");
1036 msg->header.size = htons (total_size);
1037 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
1038 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1039 GNUNET_PEER_resolve (info->destination, &msg->destination);
1040 msg->tid = htonl (info->origin->tid);
1041 if (0 != info->size)
1043 memcpy (&msg[1], &info[1], info->size);
1045 if (NULL != info->client)
1047 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1055 * Function called to notify a client about the socket
1056 * being ready to queue more data. "buf" will be
1057 * NULL and "size" zero if the socket was closed for
1058 * writing in the meantime.
1060 * @param cls closure (data itself)
1061 * @param size number of bytes available in buf
1062 * @param buf where the callee should write the message
1063 * @return number of bytes written to buf
1066 send_core_data_multicast (void *cls, size_t size, void *buf)
1068 struct MeshDataDescriptor *info = cls;
1069 struct GNUNET_MESH_Multicast *msg = buf;
1072 GNUNET_assert (NULL != info);
1073 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1074 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1078 info->peer->core_transmit[info->handler_n] = NULL;
1080 if (total_size > size)
1082 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1083 "not enough buffer to send data futher\n");
1086 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1087 msg->header.size = htons (total_size);
1088 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1089 msg->tid = htonl (info->origin->tid);
1090 memcpy (&msg[1], &info[1], total_size);
1091 if (0 == --info->copies)
1093 if (NULL != info->client)
1095 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1104 * Function called to notify a client about the socket
1105 * being ready to queue more data. "buf" will be
1106 * NULL and "size" zero if the socket was closed for
1107 * writing in the meantime.
1109 * @param cls closure (MeshDataDescriptor)
1110 * @param size number of bytes available in buf
1111 * @param buf where the callee should write the message
1112 * @return number of bytes written to buf
1115 send_core_path_ack (void *cls, size_t size, void *buf)
1117 struct MeshDataDescriptor *info = cls;
1118 struct GNUNET_MESH_PathACK *msg = buf;
1120 GNUNET_assert (NULL != info);
1123 info->peer->core_transmit[info->handler_n] = NULL;
1125 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1130 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1131 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1132 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1133 msg->tid = htonl (info->origin->tid);
1134 GNUNET_PEER_resolve (myid, &msg->peer_id);
1135 /* TODO add signature */
1137 return sizeof (struct GNUNET_MESH_PathACK);
1142 * Function called to notify a client about the socket
1143 * being ready to queue more data. "buf" will be
1144 * NULL and "size" zero if the socket was closed for
1145 * writing in the meantime.
1147 * @param cls closure (data itself)
1148 * @param size number of bytes available in buf
1149 * @param buf where the callee should write the message
1150 * @return number of bytes written to buf
1153 send_core_data_raw (void *cls, size_t size, void *buf)
1155 struct GNUNET_MessageHeader *msg = cls;
1158 GNUNET_assert (NULL != msg);
1159 total_size = ntohs (msg->size);
1161 if (total_size > size)
1166 memcpy (buf, msg, total_size);
1174 * Send another peer a notification to destroy a tunnel
1175 * @param cls The tunnel to destroy
1176 * @param size Size in the buffer
1177 * @param buf Memory where to put the data to transmit
1178 * @return Size of data put in buffer
1181 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1183 struct MeshTunnel *t = cls;
1184 struct MeshClient *c;
1185 struct GNUNET_MESH_TunnelMessage *msg;
1189 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1190 /*FIXME*/ msg->header.size =
1191 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1192 msg->tunnel_id = htonl (t->id.tid);
1194 destroy_tunnel (c, t);
1195 return sizeof (struct GNUNET_MESH_TunnelMessage);
1201 * Send the message to all clients that have subscribed to its type
1203 * @param msg Pointer to the message itself
1204 * @return number of clients this message was sent to
1207 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1209 struct MeshClient *c;
1213 type = ntohs (msg->type);
1214 for (count = 0, c = clients; c != NULL; c = c->next)
1216 if (is_client_subscribed (type, c))
1219 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1228 * Iterator over hash map peer entries collect all neighbors who to resend the
1231 * @param cls closure (**GNUNET_PEER_Id to store hops to send packet)
1232 * @param key current key code (peer id hash)
1233 * @param value value in the hash map (peer_info)
1234 * @return GNUNET_YES if we should continue to iterate, GNUNET_NO if not.
1237 iterate_collect_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
1239 struct MeshPeerInfo *peer_info = value;
1240 GNUNET_PEER_Id **neighbors = cls;
1244 if (peer_info->id == myid)
1248 id = get_first_hop (peer_info->path);
1249 for (i = 0; *neighbors[i] != 0; i++)
1251 if (*neighbors[i] == id)
1254 *neighbors = GNUNET_realloc (*neighbors, (i + 2) * sizeof (GNUNET_PEER_Id));
1256 *neighbors[i + 1] = 0;
1262 /******************************************************************************/
1263 /******************** MESH NETWORK HANDLERS **************************/
1264 /******************************************************************************/
1268 * Core handler for path creation
1269 * struct GNUNET_CORE_MessageHandler
1271 * @param cls closure
1272 * @param message message
1273 * @param peer peer identity this notification is about
1274 * @param atsi performance data
1275 * @return GNUNET_OK to keep the connection open,
1276 * GNUNET_SYSERR to close it (signal serious error)
1280 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1281 const struct GNUNET_MessageHeader *message,
1282 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1284 unsigned int own_pos;
1287 MESH_TunnelNumber tid;
1288 struct GNUNET_MESH_ManipulatePath *msg;
1289 struct GNUNET_PeerIdentity *pi;
1290 struct GNUNET_PeerIdentity id;
1291 GNUNET_HashCode hash;
1292 struct MeshPath *path;
1293 struct MeshPeerInfo *dest_peer_info;
1294 struct MeshPeerInfo *orig_peer_info;
1295 struct MeshTunnel *t;
1297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1298 "MESH: Received a MESH path create msg\n");
1299 size = ntohs (message->size);
1300 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1302 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1303 "received create path message too short\n");
1307 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1308 if (size < 2 * sizeof (struct GNUNET_PeerIdentity))
1310 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1311 "create path message lacks enough peers\n");
1314 if (size % sizeof (struct GNUNET_PeerIdentity))
1316 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1317 "create path message of wrong size\n");
1320 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1321 size /= sizeof (struct GNUNET_PeerIdentity);
1323 tid = ntohl (msg->tid);
1324 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1325 t = retrieve_tunnel (pi, tid);
1329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1330 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1331 t->id.oid = GNUNET_PEER_intern (pi);
1333 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1335 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1337 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1338 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1346 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1347 if (NULL == dest_peer_info)
1349 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1350 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1351 dest_peer_info->state = MESH_PEER_WAITING;
1352 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1354 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1356 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1357 if (NULL == orig_peer_info)
1359 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1360 orig_peer_info->id = GNUNET_PEER_intern (pi);
1361 orig_peer_info->state = MESH_PEER_WAITING;
1362 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1363 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1367 path = GNUNET_malloc (sizeof (struct MeshPath));
1368 path->length = size;
1369 path->peers = GNUNET_malloc (size * sizeof (GNUNET_PEER_Id));
1371 for (i = 0; i < size; i++)
1373 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1374 if (path->peers[i] == myid)
1378 { /* cannot be self, must be 'not found' */
1379 /* create path: self not found in path through self */
1380 GNUNET_break_op (0);
1381 destroy_path (path);
1382 /* FIXME error. destroy tunnel? leave for timeout? */
1385 if (own_pos == size - 1)
1386 { /* it is for us! */
1387 struct MeshDataDescriptor *info;
1390 add_path_to_origin (orig_peer_info, path); /* inverts path! */
1391 GNUNET_PEER_resolve (get_first_hop (path), &id); /* path is inverted :) */
1392 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1393 info->origin = &t->id;
1394 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1395 GNUNET_assert (info->peer);
1396 for (j = 0; info->peer->core_transmit[j]; j++)
1404 info->handler_n = j;
1405 info->peer->core_transmit[j] =
1406 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1407 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1408 sizeof (struct GNUNET_MessageHeader),
1409 &send_core_path_ack, info);
1413 add_path_to_peer (dest_peer_info, path);
1414 GNUNET_PEER_resolve (get_first_hop (path), &id);
1415 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1416 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1417 sizeof (struct GNUNET_MessageHeader),
1418 &send_core_create_path_for_peer,
1426 * Core handler for mesh network traffic going from the origin to a peer
1428 * @param cls closure
1429 * @param message message
1430 * @param peer peer identity this notification is about
1431 * @param atsi performance data
1432 * @return GNUNET_OK to keep the connection open,
1433 * GNUNET_SYSERR to close it (signal serious error)
1436 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1437 const struct GNUNET_MessageHeader *message,
1438 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1440 struct GNUNET_MESH_Unicast *msg;
1441 struct GNUNET_PeerIdentity id;
1442 struct MeshTunnel *t;
1443 struct MeshPeerInfo *pi;
1446 size = ntohs (message->size);
1448 sizeof (struct GNUNET_MESH_Unicast) +
1449 sizeof (struct GNUNET_MessageHeader))
1454 msg = (struct GNUNET_MESH_Unicast *) message;
1455 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1458 /* TODO notify back: we don't know this tunnel */
1461 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1462 &msg->destination.hashPubKey);
1465 /* TODO maybe feedback, log to statistics */
1470 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1473 GNUNET_PEER_resolve (get_first_hop (pi->path), &id);
1474 msg = GNUNET_malloc (size);
1475 memcpy (msg, message, size);
1476 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1477 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1478 &send_core_data_raw, msg);
1484 * Core handler for mesh network traffic going from the origin to all peers
1486 * @param cls closure
1487 * @param message message
1488 * @param peer peer identity this notification is about
1489 * @param atsi performance data
1490 * @return GNUNET_OK to keep the connection open,
1491 * GNUNET_SYSERR to close it (signal serious error)
1494 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1495 const struct GNUNET_MessageHeader *message,
1496 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1498 struct GNUNET_MESH_Multicast *msg;
1499 struct GNUNET_PeerIdentity id;
1500 struct MeshTunnel *t;
1501 struct MeshDataDescriptor *info;
1502 GNUNET_PEER_Id *neighbors;
1508 size = ntohs (message->size);
1510 sizeof (struct GNUNET_MESH_Multicast) +
1511 sizeof (struct GNUNET_MessageHeader))
1513 GNUNET_break_op (0);
1516 msg = (struct GNUNET_MESH_Multicast *) message;
1517 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1521 /* TODO notify that we dont know that tunnel */
1525 /* Transmit to locally interested clients */
1526 GNUNET_PEER_resolve (myid, &id);
1527 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
1529 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1532 /* Retransmit to other peers */
1533 neighbors = GNUNET_malloc (sizeof (GNUNET_PEER_Id));
1535 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &iterate_collect_neighbors,
1541 size -= sizeof (struct GNUNET_MESH_Multicast);
1542 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + size);
1543 info->origin = &t->id;
1545 for (i = 0; 0 != neighbors[i]; i++)
1547 GNUNET_PEER_resolve (neighbors[i], &id);
1549 info->destination = neighbors[i];
1550 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1551 GNUNET_assert (info->peer);
1552 for (j = 0; info->peer->core_transmit[j]; j++)
1560 info->handler_n = j;
1561 info->peer->infos[j] = info;
1562 info->peer->core_transmit[j] =
1563 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1564 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1565 ntohs (msg->header.size),
1566 &send_core_data_multicast, info);
1573 * Core handler for mesh network traffic
1575 * @param cls closure
1576 * @param message message
1577 * @param peer peer identity this notification is about
1578 * @param atsi performance data
1579 * @return GNUNET_OK to keep the connection open,
1580 * GNUNET_SYSERR to close it (signal serious error)
1583 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
1584 const struct GNUNET_MessageHeader *message,
1585 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1587 struct GNUNET_MESH_ToOrigin *msg;
1588 struct GNUNET_PeerIdentity id;
1589 struct MeshTunnel *t;
1590 struct MeshPeerInfo *peer_info;
1593 size = ntohs (message->size);
1595 sizeof (struct GNUNET_MESH_ToOrigin) +
1596 sizeof (struct GNUNET_MessageHeader))
1598 GNUNET_break_op (0);
1601 msg = (struct GNUNET_MESH_ToOrigin *) message;
1602 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1606 /* TODO notify that we dont know this tunnel (whom)? */
1610 if (t->id.oid == myid)
1612 if (NULL == t->client)
1614 /* got data packet for ownerless tunnel */
1615 GNUNET_break_op (0);
1618 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
1622 peer_info = get_peer_info (&msg->oid);
1623 if (NULL == peer_info)
1625 /* unknown origin of tunnel */
1629 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1630 msg = GNUNET_malloc (size);
1631 memcpy (msg, message, size);
1632 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1633 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1634 &send_core_data_raw, msg);
1641 * Core handler for path ACKs
1643 * @param cls closure
1644 * @param message message
1645 * @param peer peer identity this notification is about
1646 * @param atsi performance data
1647 * @return GNUNET_OK to keep the connection open,
1648 * GNUNET_SYSERR to close it (signal serious error)
1651 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
1652 const struct GNUNET_MessageHeader *message,
1653 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1655 struct GNUNET_MESH_PathACK *msg;
1656 struct GNUNET_PeerIdentity id;
1657 struct MeshTunnel *t;
1658 struct MeshPeerInfo *peer_info;
1660 msg = (struct GNUNET_MESH_PathACK *) message;
1661 t = retrieve_tunnel (&msg->oid, msg->tid);
1664 /* TODO notify that we don't know the tunnel */
1668 /* Message for us? */
1669 if (GNUNET_PEER_search (&msg->oid) == myid)
1671 struct GNUNET_MESH_PeerControl pc;
1673 if (NULL == t->client)
1678 peer_info = get_peer_info (&msg->peer_id);
1679 if (NULL == peer_info)
1681 GNUNET_break_op (0);
1684 peer_info->state = MESH_PEER_READY;
1685 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1686 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1687 pc.tunnel_id = htonl (t->local_tid);
1688 GNUNET_PEER_resolve (peer_info->id, &pc.peer);
1689 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1690 &pc.header, GNUNET_NO);
1694 peer_info = get_peer_info (&msg->oid);
1695 if (NULL == peer_info)
1697 /* If we know the tunnel, we should DEFINITELY know the peer */
1701 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1702 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
1703 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
1704 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1705 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1706 sizeof (struct GNUNET_MESH_PathACK),
1707 &send_core_data_raw, msg);
1713 * Functions to handle messages from core
1715 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1716 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
1717 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
1718 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
1719 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
1720 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1721 sizeof (struct GNUNET_MESH_PathACK)},
1727 /******************************************************************************/
1728 /**************** MESH LOCAL HANDLER HELPERS ***********************/
1729 /******************************************************************************/
1732 * delete_tunnel_entry: iterator for deleting each tunnel that belongs to a
1733 * client when the client disconnects.
1734 * @param cls closure (client that is disconnecting)
1735 * @param key the hash of the local tunnel id (used to access the hashmap)
1736 * @param value the value stored at the key (tunnel to destroy)
1737 * @return GNUNET_OK on success
1740 delete_tunnel_entry (void *cls, const GNUNET_HashCode * key, void *value)
1744 r = destroy_tunnel ((struct MeshTunnel *) value);
1750 * notify_client_connection_failure: notify a client that the connection to the
1751 * requested remote peer is not possible (for instance, no route found)
1752 * Function called when the socket is ready to queue more data. "buf" will be
1753 * NULL and "size" zero if the socket was closed for writing in the meantime.
1755 * @param cls closure
1756 * @param size number of bytes available in buf
1757 * @param buf where the callee should write the message
1758 * @return number of bytes written to buf
1761 notify_client_connection_failure (void *cls, size_t size, void *buf)
1764 struct MeshPeerInfo *peer_info;
1765 struct GNUNET_MESH_PeerControl *msg;
1766 struct GNUNET_PeerIdentity id;
1768 if (0 == size && NULL == buf)
1770 // TODO retry? cancel?
1774 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
1775 peer_info = (struct MeshPeerInfo *) cls;
1776 msg = (struct GNUNET_MESH_PeerControl *) buf;
1777 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1778 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
1779 // msg->tunnel_id = htonl(peer_info->t->tid);
1780 GNUNET_PEER_resolve (peer_info->id, &id);
1781 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
1789 * Send keepalive packets for a peer
1795 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1797 struct MeshPeerInfo *peer_info = cls;
1798 struct GNUNET_PeerIdentity id;
1800 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1802 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1803 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1804 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1805 sizeof (struct GNUNET_MESH_ManipulatePath)
1807 (peer_info->path->length *
1808 sizeof (struct GNUNET_PeerIdentity)),
1809 &send_core_create_path_for_peer,
1811 peer_info->path_refresh_task =
1812 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh,
1819 * Function to process paths received for a new peer addition. The recorded
1820 * paths form the initial tunnel, which can be optimized later.
1821 * Called on each result obtained for the DHT search.
1823 * @param cls closure
1824 * @param exp when will this value expire
1825 * @param key key of the result
1826 * @param get_path NULL-terminated array of pointers
1827 * to the peers on reverse GET path (or NULL if not recorded)
1828 * @param put_path NULL-terminated array of pointers
1829 * to the peers on the PUT path (or NULL if not recorded)
1830 * @param type type of the result
1831 * @param size number of bytes in data
1832 * @param data pointer to the result data
1835 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1836 const GNUNET_HashCode * key,
1837 const struct GNUNET_PeerIdentity *const *get_path,
1838 const struct GNUNET_PeerIdentity *const *put_path,
1839 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
1841 struct MeshPeerInfo *peer_info = cls;
1843 struct GNUNET_PeerIdentity pi;
1846 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path)
1848 // Find ourselves some alternate initial path to the destination: retry
1849 GNUNET_DHT_get_stop (peer_info->dhtget);
1850 GNUNET_PEER_resolve (peer_info->id, &pi);
1851 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_BLOCK_TYPE_ANY, &pi.hashPubKey, 4, /* replication level */
1852 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
1855 0, /* xquery bits */
1857 (void *) peer_info);
1860 p = GNUNET_malloc (sizeof (struct MeshPath));
1861 for (i = 0; get_path[i] != NULL; i++) ;
1862 for (i--; i >= 0; i--)
1865 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1866 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1869 for (i = 0; put_path[i] != NULL; i++) ;
1870 for (i--; i >= 0; i--)
1873 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1874 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
1877 add_path_to_peer (peer_info, p);
1878 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1879 GNUNET_TIME_UNIT_FOREVER_REL, get_path[1],
1880 sizeof (struct GNUNET_MESH_ManipulatePath)
1883 sizeof (struct GNUNET_PeerIdentity)),
1884 &send_core_create_path_for_peer,
1886 if (0 == peer_info->path_refresh_task)
1888 peer_info->path_refresh_task =
1889 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh,
1897 * Function to process paths received for a new peer addition. The recorded
1898 * paths form the initial tunnel, which can be optimized later.
1899 * Called on each result obtained for the DHT search.
1901 * @param cls closure
1902 * @param exp when will this value expire
1903 * @param key key of the result
1904 * @param get_path NULL-terminated array of pointers
1905 * to the peers on reverse GET path (or NULL if not recorded)
1906 * @param put_path NULL-terminated array of pointers
1907 * to the peers on the PUT path (or NULL if not recorded)
1908 * @param type type of the result
1909 * @param size number of bytes in data
1910 * @param data pointer to the result data
1913 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1914 const GNUNET_HashCode * key,
1915 const struct GNUNET_PeerIdentity *const *get_path,
1916 const struct GNUNET_PeerIdentity *const *put_path,
1917 enum GNUNET_BLOCK_Type type, size_t size,
1920 const struct GNUNET_PeerIdentity *pi = data;
1921 struct MeshTunnel *t = cls;
1922 struct MeshPeerInfo *peer_info;
1927 if (size != sizeof (struct GNUNET_PeerIdentity))
1929 GNUNET_break_op (0);
1932 peer_info = get_peer_info (pi);
1933 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
1934 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1935 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path)
1937 /* we don't have a route to the peer, let's try a direct lookup */
1938 if (NULL == peer_info->dhtget)
1940 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_BLOCK_TYPE_ANY, &pi->hashPubKey, 10U, /* replication level */
1941 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
1944 0, /* xquery bits */
1945 dht_get_id_handler, peer_info);
1949 p = GNUNET_malloc (sizeof (struct MeshPath));
1950 for (i = 0; get_path[i] != NULL; i++) ;
1951 for (i--; i >= 0; i--)
1954 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1955 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1958 for (i = 0; put_path[i] != NULL; i++) ;
1959 for (i--; i >= 0; i--)
1962 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1963 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
1966 add_path_to_peer (peer_info, p);
1967 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1968 GNUNET_TIME_UNIT_FOREVER_REL, get_path[1],
1969 sizeof (struct GNUNET_MESH_ManipulatePath)
1972 sizeof (struct GNUNET_PeerIdentity)),
1973 &send_core_create_path_for_peer,
1978 /******************************************************************************/
1979 /********************* MESH LOCAL HANDLES **************************/
1980 /******************************************************************************/
1984 * Handler for client disconnection
1986 * @param cls closure
1987 * @param client identification of the client; NULL
1988 * for the last call when the server is destroyed
1991 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
1993 struct MeshClient *c;
1994 struct MeshClient *next;
1998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2002 if (c->handle == client)
2004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2005 " matching client found, cleaning\n");
2006 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels, &delete_tunnel_entry,
2008 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2009 if (0 != c->app_counter)
2010 { /* deregister clients applications */
2011 for (i = 0; i < c->app_counter; i++)
2013 for (j = 0; j < n_applications; j++)
2015 if (c->apps[i] == applications[j])
2017 if (0 == --applications_rc[j])
2019 applications[j] = applications[n_applications - 1];
2020 applications_rc[j] = applications_rc[n_applications - 1];
2023 GNUNET_realloc (applications,
2025 sizeof (GNUNET_MESH_ApplicationType));
2027 GNUNET_realloc (applications_rc,
2028 n_applications * sizeof (unsigned int));
2034 GNUNET_free (c->apps);
2035 if (0 == n_applications)
2037 GNUNET_SCHEDULER_cancel (announce_applications_task);
2040 if (0 != c->type_counter)
2041 GNUNET_free (c->types);
2042 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2060 * Handler for new clients
2062 * @param cls closure
2063 * @param client identification of the client
2064 * @param message the actual message, which includes messages the client wants
2067 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2068 const struct GNUNET_MessageHeader *message)
2070 struct GNUNET_MESH_ClientConnect *cc_msg;
2071 struct MeshClient *c;
2079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2080 /* Check data sanity */
2081 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2082 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2083 types = ntohs (cc_msg->types);
2084 apps = ntohs (cc_msg->applications);
2086 types * sizeof (uint16_t) + apps * sizeof (GNUNET_MESH_ApplicationType))
2089 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2093 /* Create new client structure */
2094 c = GNUNET_malloc (sizeof (struct MeshClient));
2098 c->type_counter = types;
2099 c->types = GNUNET_malloc (types * sizeof (uint16_t));
2100 memcpy (c->types, &message[1], types * sizeof (uint16_t));
2104 c->app_counter = apps;
2105 c->apps = GNUNET_malloc (apps * sizeof (GNUNET_MESH_ApplicationType));
2106 memcpy (c->apps, &message[1] + types * sizeof (uint16_t),
2107 apps * sizeof (GNUNET_MESH_ApplicationType));
2109 for (i = 0; i < apps; i++)
2112 for (j = 0; i < n_applications; j++)
2114 if (c->apps[i] == applications[j])
2117 applications_rc[j]++;
2122 { /* Register previously unknown application */
2125 GNUNET_realloc (applications,
2127 sizeof (GNUNET_MESH_ApplicationType));
2129 GNUNET_realloc (applications_rc,
2130 n_applications * sizeof (unsigned int));
2131 applications[n_applications - 1] = c->apps[i];
2132 applications_rc[n_applications - 1] = 1;
2133 if (0 == announce_applications_task)
2135 announce_applications_task =
2136 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME,
2137 &announce_applications, NULL);
2141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2142 "MESH: client has %u+%u subscriptions\n", c->type_counter,
2145 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2146 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2147 GNUNET_SERVER_notification_context_add (nc, client);
2149 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2155 * Handler for requests of new tunnels
2157 * @param cls closure
2158 * @param client identification of the client
2159 * @param message the actual message
2162 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2163 const struct GNUNET_MessageHeader *message)
2165 struct GNUNET_MESH_TunnelMessage *t_msg;
2166 struct MeshTunnel *t;
2167 struct MeshClient *c;
2168 GNUNET_HashCode hash;
2170 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2172 /* Sanity check for client registration */
2173 if (NULL == (c = retrieve_client (client)))
2176 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2180 /* Message sanity check */
2181 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2184 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2188 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2189 /* Sanity check for tunnel numbering */
2190 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2193 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2196 /* Sanity check for duplicate tunnel IDs */
2197 if (NULL != retrieve_tunnel_by_local_id (c, ntohl (t_msg->tunnel_id)))
2200 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2204 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2205 while (NULL != retrieve_tunnel_by_pi (myid, next_tid))
2206 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2207 t->id.tid = next_tid++;
2209 t->local_tid = ntohl (t_msg->tunnel_id);
2211 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2213 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2215 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2216 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2219 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2223 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2225 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2226 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2229 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2233 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2239 * Handler for requests of deleting tunnels
2241 * @param cls closure
2242 * @param client identification of the client
2243 * @param message the actual message
2246 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2247 const struct GNUNET_MessageHeader *message)
2249 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2250 struct MeshClient *c;
2251 struct MeshTunnel *t;
2252 MESH_TunnelNumber tid;
2253 GNUNET_HashCode hash;
2255 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2257 /* Sanity check for client registration */
2258 if (NULL == (c = retrieve_client (client)))
2261 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2264 /* Message sanity check */
2265 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2268 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2272 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2274 /* Retrieve tunnel */
2275 tid = ntohl (tunnel_msg->tunnel_id);
2277 /* Remove from local id hashmap */
2278 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2279 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2280 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2282 /* Remove from global id hashmap */
2283 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2284 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2286 // notify_tunnel_destroy(t);
2287 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2293 * Handler for connection requests to new peers
2295 * @param cls closure
2296 * @param client identification of the client
2297 * @param message the actual message (PeerControl)
2300 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2301 const struct GNUNET_MessageHeader *message)
2303 struct GNUNET_MESH_PeerControl *peer_msg;
2304 struct MeshClient *c;
2305 struct MeshTunnel *t;
2306 MESH_TunnelNumber tid;
2307 struct MeshPeerInfo *peer_info;
2310 /* Sanity check for client registration */
2311 if (NULL == (c = retrieve_client (client)))
2314 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2318 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2319 /* Sanity check for message size */
2320 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2323 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2327 /* Tunnel exists? */
2328 tid = ntohl (peer_msg->tunnel_id);
2329 t = retrieve_tunnel_by_local_id (c, tid);
2333 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2337 /* Does client own tunnel? */
2338 if (t->client->handle != client)
2341 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2346 peer_info = get_peer_info (&peer_msg->peer);
2348 /* Start DHT search if needed */
2349 if (MESH_PEER_READY != peer_info->state && NULL == peer_info->dhtget)
2351 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_BLOCK_TYPE_ANY, &peer_msg->peer.hashPubKey, 4, /* replication level */
2352 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2355 0, /* xquery bits */
2357 (void *) peer_info);
2360 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2366 * Handler for disconnection requests of peers in a tunnel
2368 * @param cls closure
2369 * @param client identification of the client
2370 * @param message the actual message (PeerControl)
2373 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2374 const struct GNUNET_MessageHeader *message)
2376 struct GNUNET_MESH_PeerControl *peer_msg;
2377 struct MeshClient *c;
2378 struct MeshTunnel *t;
2379 MESH_TunnelNumber tid;
2381 /* Sanity check for client registration */
2382 if (NULL == (c = retrieve_client (client)))
2385 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2388 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2389 /* Sanity check for message size */
2390 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2393 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2397 /* Tunnel exists? */
2398 tid = ntohl (peer_msg->tunnel_id);
2399 t = retrieve_tunnel_by_local_id (c, tid);
2403 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2407 /* Does client own tunnel? */
2408 if (t->client->handle != client)
2411 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2415 /* Ok, delete peer from tunnel */
2416 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2417 &peer_msg->peer.hashPubKey);
2419 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2425 * Handler for connection requests to new peers by type
2427 * @param cls closure
2428 * @param client identification of the client
2429 * @param message the actual message (ConnectPeerByType)
2432 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2433 const struct GNUNET_MessageHeader *message)
2435 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2436 struct MeshClient *c;
2437 struct MeshTunnel *t;
2438 GNUNET_HashCode hash;
2439 GNUNET_MESH_ApplicationType type;
2440 MESH_TunnelNumber tid;
2441 uint8_t buffer[12] = "MESH_APP";
2445 /* Sanity check for client registration */
2446 if (NULL == (c = retrieve_client (client)))
2449 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2453 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2454 /* Sanity check for message size */
2455 if (sizeof (struct GNUNET_MESH_PeerControl) !=
2456 ntohs (connect_msg->header.size))
2459 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2463 /* Tunnel exists? */
2464 tid = ntohl (connect_msg->tunnel_id);
2465 t = retrieve_tunnel_by_local_id (c, tid);
2469 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2473 /* Does client own tunnel? */
2474 if (t->client->handle != client)
2477 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2481 /* Do WE have the service? */
2482 type = ntohl (connect_msg->type);
2483 for (i = 0; i < n_applications; i++)
2485 if (applications[i] == type)
2487 /* Yes! Fast forward, add ourselves to the tunnel and send the
2488 * good news to the client
2490 struct GNUNET_MESH_PeerControl pc;
2492 GNUNET_PEER_resolve (myid, &pc.peer);
2493 GNUNET_CONTAINER_multihashmap_put (t->peers, &pc.peer.hashPubKey,
2494 get_peer_info (&pc.peer),
2495 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2496 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2497 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2498 pc.tunnel_id = htonl (t->local_tid);
2499 GNUNET_SERVER_notification_context_unicast (nc, client, NULL, GNUNET_NO);
2502 /* Ok, lets find a peer offering the service */
2503 p = (uint32_t *) & buffer[8];
2504 *p = connect_msg->type; /* Already in Network Byte Order! */
2505 GNUNET_CRYPTO_hash (buffer, 12, &hash);
2506 if (c->dht_get_type)
2508 GNUNET_DHT_get_stop (c->dht_get_type);
2511 GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
2512 GNUNET_BLOCK_TYPE_ANY, &hash, 10U,
2513 GNUNET_DHT_RO_RECORD_ROUTE, NULL, 0, NULL, 0,
2514 &dht_get_type_handler, t);
2516 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2522 * Handler for client traffic directed to one peer
2524 * @param cls closure
2525 * @param client identification of the client
2526 * @param message the actual message
2529 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
2530 const struct GNUNET_MessageHeader *message)
2532 struct MeshClient *c;
2533 struct MeshTunnel *t;
2534 struct MeshPeerInfo *pi;
2535 struct GNUNET_MESH_Unicast *data_msg;
2536 struct GNUNET_PeerIdentity next_hop;
2537 struct MeshDataDescriptor *info;
2538 MESH_TunnelNumber tid;
2541 /* Sanity check for client registration */
2542 if (NULL == (c = retrieve_client (client)))
2545 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2548 data_msg = (struct GNUNET_MESH_Unicast *) message;
2549 /* Sanity check for message size */
2550 if (sizeof (struct GNUNET_MESH_Unicast) +
2551 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
2554 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2558 /* Tunnel exists? */
2559 tid = ntohl (data_msg->tid);
2560 t = retrieve_tunnel_by_local_id (c, tid);
2564 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2568 /* Is it a local tunnel? Then, does client own the tunnel? */
2569 if (t->client->handle != NULL && t->client->handle != client)
2572 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2576 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2577 &data_msg->destination.hashPubKey);
2578 /* Is the selected peer in the tunnel? */
2582 * Are we SO nice that we automatically try to add him to the tunnel?
2585 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2590 struct GNUNET_MESH_Unicast copy;
2592 memcpy (©, data_msg, sizeof (struct GNUNET_MESH_Unicast));
2594 handle_mesh_data_unicast (NULL, NULL, ©.header, NULL);
2597 GNUNET_PEER_resolve (get_first_hop (pi->path), &next_hop);
2598 data_size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Unicast);
2599 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + data_size);
2600 memcpy (&info[1], &data_msg[1], data_size);
2601 info->destination = pi->id;
2602 info->origin = &t->id;
2603 info->size = data_size;
2604 info->client = client;
2605 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2606 GNUNET_TIME_UNIT_FOREVER_REL, &next_hop,
2607 /* FIXME re-check types */
2609 sizeof (struct GNUNET_MESH_Unicast),
2610 &send_core_data_unicast, info);
2615 * Handler for client traffic directed to all peers in a tunnel
2617 * @param cls closure
2618 * @param client identification of the client
2619 * @param message the actual message
2622 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
2623 const struct GNUNET_MessageHeader *message)
2625 struct MeshClient *c;
2626 struct MeshTunnel *t;
2627 struct GNUNET_MESH_Multicast *data_msg;
2628 MESH_TunnelNumber tid;
2630 /* Sanity check for client registration */
2631 if (NULL == (c = retrieve_client (client)))
2634 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2637 data_msg = (struct GNUNET_MESH_Multicast *) message;
2638 /* Sanity check for message size */
2639 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
2642 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2646 /* Tunnel exists? */
2647 tid = ntohl (data_msg->tid);
2648 t = retrieve_tunnel_by_local_id (c, tid);
2652 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2656 /* Does client own tunnel? */
2657 if (t->client->handle != client)
2660 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2666 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2671 * Functions to handle messages from clients
2673 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
2674 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
2675 {&handle_local_tunnel_create, NULL,
2676 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
2677 sizeof (struct GNUNET_MESH_TunnelMessage)},
2678 {&handle_local_tunnel_destroy, NULL,
2679 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
2680 sizeof (struct GNUNET_MESH_TunnelMessage)},
2681 {&handle_local_connect_add, NULL,
2682 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
2683 sizeof (struct GNUNET_MESH_PeerControl)},
2684 {&handle_local_connect_del, NULL,
2685 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
2686 sizeof (struct GNUNET_MESH_PeerControl)},
2687 {&handle_local_connect_by_type, NULL,
2688 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
2689 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
2690 {&handle_local_unicast, NULL,
2691 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2692 {&handle_local_unicast, NULL,
2693 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2694 {&handle_local_multicast, NULL,
2695 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2701 * To be called on core init/fail.
2703 * @param cls service closure
2704 * @param server handle to the server for this service
2705 * @param identity the public identity of this peer
2706 * @param publicKey the public key of this peer
2709 core_init (void *cls, struct GNUNET_CORE_Handle *server,
2710 const struct GNUNET_PeerIdentity *identity,
2711 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
2713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
2714 core_handle = server;
2715 myid = GNUNET_PEER_intern (identity);
2716 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
2721 * Method called whenever a given peer connects.
2723 * @param cls closure
2724 * @param peer peer identity this notification is about
2725 * @param atsi performance data for the connection
2728 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
2729 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2731 // GNUNET_PEER_Id pid;
2732 struct MeshPeerInfo *peer_info;
2733 struct MeshPath *path;
2735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
2736 peer_info = get_peer_info (peer);
2737 if (myid == peer_info->id)
2739 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
2741 path = GNUNET_malloc (sizeof (struct MeshPath));
2743 path->peers = GNUNET_malloc (sizeof (GNUNET_PEER_Id) * 2);
2744 path->peers[0] = myid;
2745 path->peers[1] = peer_info->id;
2746 add_path_to_peer (peer_info, path);
2751 * Method called whenever a peer disconnects.
2753 * @param cls closure
2754 * @param peer peer identity this notification is about
2757 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
2759 struct MeshPeerInfo *pi;
2762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
2763 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2769 for (i = 0; i < CORE_QUEUE_SIZE; i++)
2771 if (pi->core_transmit[i])
2773 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
2774 /* TODO: notify that tranmission has failed */
2775 GNUNET_free (pi->infos[i]);
2780 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
2786 /******************************************************************************/
2787 /************************ MAIN FUNCTIONS ****************************/
2788 /******************************************************************************/
2791 * Task run during shutdown.
2797 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
2800 if (core_handle != NULL)
2802 GNUNET_CORE_disconnect (core_handle);
2805 if (dht_handle != NULL)
2807 GNUNET_DHT_disconnect (dht_handle);
2812 GNUNET_SERVER_notification_context_destroy (nc);
2815 if (0 != announce_id_task)
2817 GNUNET_SCHEDULER_cancel (announce_id_task);
2818 announce_id_task = 0;
2820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
2824 * Process mesh requests.
2826 * @param cls closure
2827 * @param server the initialized server
2828 * @param c configuration to use
2831 run (void *cls, struct GNUNET_SERVER_Handle *server,
2832 const struct GNUNET_CONFIGURATION_Handle *c)
2834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
2835 GNUNET_SERVER_add_handlers (server, plugin_handlers);
2836 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
2837 server_handle = server;
2838 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
2839 CORE_QUEUE_SIZE, /* queue size */
2840 NULL, /* Closure passed to MESH functions */
2841 &core_init, /* Call core_init once connected */
2842 &core_connect, /* Handle connects */
2843 &core_disconnect, /* remove peers on disconnects */
2844 NULL, /* Do we care about "status" updates? */
2845 NULL, /* Don't notify about all incoming messages */
2846 GNUNET_NO, /* For header only in notification */
2847 NULL, /* Don't notify about all outbound messages */
2848 GNUNET_NO, /* For header-only out notification */
2849 core_handlers); /* Register these handlers */
2850 if (core_handle == NULL)
2854 dht_handle = GNUNET_DHT_connect (c, 64);
2855 if (dht_handle == NULL)
2857 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Error connecting to DHT.\
2858 Running without DHT has a severe\
2859 impact in MESH capabilities.\n\
2860 Plase check your configuretion and enable DHT.\n");
2866 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2867 peers = GNUNET_CONTAINER_multihashmap_create (32);
2868 nc = GNUNET_SERVER_notification_context_create (server_handle,
2871 clients_tail = NULL;
2873 applications = NULL;
2874 applications_rc = NULL;
2876 announce_applications_task = 0;
2878 /* Scheduled the task to clean up when shutdown is called */
2879 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
2882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
2886 * The main function for the mesh service.
2888 * @param argc number of arguments from the command line
2889 * @param argv command line arguments
2890 * @return 0 ok, 1 on error
2893 main (int argc, char *const *argv)
2897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
2900 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
2902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");