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_apps;
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;
772 struct MeshQueue *qn;
773 GNUNET_HashCode hash;
781 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
782 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
787 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
788 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
792 GNUNET_CONTAINER_multihashmap_destroy(t->peers);
797 GNUNET_free(q->data);
801 /* TODO cancel core transmit ready in case it was active */
807 /******************************************************************************/
808 /************************ PERIODIC FUNCTIONS ****************************/
809 /******************************************************************************/
812 * Periodically announce what applications are provided by local clients
815 * @param tc task context
818 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
820 struct GNUNET_PeerIdentity id;
821 GNUNET_HashCode hash;
822 uint8_t buffer[12] = "MESH_APP";
826 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
828 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
831 p = (unsigned int *) &buffer[8];
832 GNUNET_PEER_resolve (myid, &id);
833 for (i = 0; i < n_apps; i++)
835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for app %d\n",
837 *p = htonl (applications[i]);
838 GNUNET_CRYPTO_hash (buffer, 12, &hash);
839 GNUNET_DHT_put (dht_handle, &hash, 10U, GNUNET_DHT_RO_RECORD_ROUTE,
840 GNUNET_BLOCK_TYPE_ANY, sizeof (struct GNUNET_PeerIdentity),
842 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
846 &mesh_debug, "MESH: DHT_put for app completed\n");
851 announce_applications_task =
852 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
859 * Periodically announce self id in the DHT
862 * @param tc task context
865 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
867 struct GNUNET_PeerIdentity id;
869 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
871 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
874 GNUNET_PEER_resolve (myid, &id);
876 * - Set data expiration in function of X
879 GNUNET_DHT_put (dht_handle, /* DHT handle */
880 &id.hashPubKey, /* Key to use */
881 10U, /* Replication level */
882 GNUNET_DHT_RO_RECORD_ROUTE, /* DHT options */
883 GNUNET_BLOCK_TYPE_ANY, /* Block type */
884 0, /* Size of the data */
885 NULL, /* Data itself */
886 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
887 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
889 &mesh_debug, "DHT_put for id completed\n");
891 NULL, /* Continuation */
892 NULL); /* Continuation closure */
895 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
898 /******************************************************************************/
899 /**************** MESH NETWORK HANDLER HELPERS ***********************/
900 /******************************************************************************/
903 * Function called to notify a client about the socket
904 * being ready to queue more data. "buf" will be
905 * NULL and "size" zero if the socket was closed for
906 * writing in the meantime.
909 * @param size number of bytes available in buf
910 * @param buf where the callee should write the message
911 * @return number of bytes written to buf
914 send_core_create_path_for_peer (void *cls, size_t size, void *buf)
916 struct MeshPeerInfo *peer_info = cls;
917 struct GNUNET_MESH_ManipulatePath *msg;
919 struct GNUNET_PeerIdentity *peer_ptr;
920 struct GNUNET_PeerIdentity id;
924 if (0 == size && NULL == buf)
926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting create path\n");
927 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
928 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
929 GNUNET_TIME_UNIT_FOREVER_REL, &id,
931 GNUNET_MESH_ManipulatePath) +
932 (peer_info->path->length *
933 sizeof (struct GNUNET_PeerIdentity)),
934 &send_core_create_path_for_peer,
948 return 0; // TODO Notify ERROR Path not found
951 sizeof (struct GNUNET_MESH_ManipulatePath) +
952 p->length * sizeof (struct GNUNET_PeerIdentity);
953 if (size < size_needed)
955 // TODO retry? cancel?
959 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
960 msg->header.size = htons (size_needed);
961 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
963 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
964 for (i = 0; i < p->length; i++)
966 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
969 peer_info->state = MESH_PEER_WAITING;
977 * Function called to notify a client about the socket
978 * being ready to queue more data. "buf" will be
979 * NULL and "size" zero if the socket was closed for
980 * writing in the meantime.
982 * @param cls closure (MeshDataDescriptor with all info to build packet)
983 * @param size number of bytes available in buf
984 * @param buf where the callee should write the message
985 * @return number of bytes written to buf
988 send_core_data_to_origin (void *cls, size_t size, void *buf)
990 struct MeshDataDescriptor *info = cls;
991 struct GNUNET_MESH_ToOrigin *msg = buf;
994 GNUNET_assert (NULL != info);
995 total_size = sizeof (struct GNUNET_MESH_ToOrigin) + info->size;
996 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
998 if (total_size > size)
1000 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1001 "not enough buffer to send data to origin\n");
1004 msg->header.size = htons (total_size);
1005 msg->header.type = htons (GNUNET_MESSAGE_TYPE_DATA_MESSAGE_TO_ORIGIN);
1006 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1007 msg->tid = htonl (info->origin->tid);
1008 if (0 != info->size)
1010 memcpy (&msg[1], &info[1], info->size);
1012 if (NULL != info->client)
1014 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1022 * Function called to notify a client about the socket
1023 * being ready to queue more data. "buf" will be
1024 * NULL and "size" zero if the socket was closed for
1025 * writing in the meantime.
1027 * @param cls closure (data itself)
1028 * @param size number of bytes available in buf
1029 * @param buf where the callee should write the message
1030 * @return number of bytes written to buf
1033 send_core_data_unicast (void *cls, size_t size, void *buf)
1035 struct MeshDataDescriptor *info = cls;
1036 struct GNUNET_MESH_Unicast *msg = buf;
1039 GNUNET_assert (NULL != info);
1040 total_size = sizeof (struct GNUNET_MESH_Unicast) + info->size;
1041 GNUNET_assert (total_size < 65536); /* UNIT16_MAX */
1043 if (total_size > size)
1045 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1046 "not enough buffer to send data to peer\n");
1049 msg->header.size = htons (total_size);
1050 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST);
1051 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1052 GNUNET_PEER_resolve (info->destination, &msg->destination);
1053 msg->tid = htonl (info->origin->tid);
1054 if (0 != info->size)
1056 memcpy (&msg[1], &info[1], info->size);
1058 if (NULL != info->client)
1060 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1068 * Function called to notify a client about the socket
1069 * being ready to queue more data. "buf" will be
1070 * NULL and "size" zero if the socket was closed for
1071 * writing in the meantime.
1073 * @param cls closure (data itself)
1074 * @param size number of bytes available in buf
1075 * @param buf where the callee should write the message
1076 * @return number of bytes written to buf
1079 send_core_data_multicast (void *cls, size_t size, void *buf)
1081 struct MeshDataDescriptor *info = cls;
1082 struct GNUNET_MESH_Multicast *msg = buf;
1085 GNUNET_assert (NULL != info);
1086 total_size = info->size + sizeof (struct GNUNET_MESH_Multicast);
1087 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
1091 info->peer->core_transmit[info->handler_n] = NULL;
1093 if (total_size > size)
1095 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1096 "not enough buffer to send data futher\n");
1099 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
1100 msg->header.size = htons (total_size);
1101 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1102 msg->tid = htonl (info->origin->tid);
1103 memcpy (&msg[1], &info[1], total_size);
1104 if (0 == --info->copies)
1106 if (NULL != info->client)
1108 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
1117 * Function called to notify a client about the socket
1118 * being ready to queue more data. "buf" will be
1119 * NULL and "size" zero if the socket was closed for
1120 * writing in the meantime.
1122 * @param cls closure (MeshDataDescriptor)
1123 * @param size number of bytes available in buf
1124 * @param buf where the callee should write the message
1125 * @return number of bytes written to buf
1128 send_core_path_ack (void *cls, size_t size, void *buf)
1130 struct MeshDataDescriptor *info = cls;
1131 struct GNUNET_MESH_PathACK *msg = buf;
1133 GNUNET_assert (NULL != info);
1136 info->peer->core_transmit[info->handler_n] = NULL;
1138 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1143 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1144 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1145 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
1146 msg->tid = htonl (info->origin->tid);
1147 GNUNET_PEER_resolve (myid, &msg->peer_id);
1148 /* TODO add signature */
1150 return sizeof (struct GNUNET_MESH_PathACK);
1155 * Function called to notify a client about the socket
1156 * being ready to queue more data. "buf" will be
1157 * NULL and "size" zero if the socket was closed for
1158 * writing in the meantime.
1160 * @param cls closure (data itself)
1161 * @param size number of bytes available in buf
1162 * @param buf where the callee should write the message
1163 * @return number of bytes written to buf
1166 send_core_data_raw (void *cls, size_t size, void *buf)
1168 struct GNUNET_MessageHeader *msg = cls;
1171 GNUNET_assert (NULL != msg);
1172 total_size = ntohs (msg->size);
1174 if (total_size > size)
1179 memcpy (buf, msg, total_size);
1187 * Send another peer a notification to destroy a tunnel
1188 * @param cls The tunnel to destroy
1189 * @param size Size in the buffer
1190 * @param buf Memory where to put the data to transmit
1191 * @return Size of data put in buffer
1194 send_p2p_tunnel_destroy (void *cls, size_t size, void *buf)
1196 struct MeshTunnel *t = cls;
1197 struct MeshClient *c;
1198 struct GNUNET_MESH_TunnelMessage *msg;
1202 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1203 /*FIXME*/ msg->header.size =
1204 htons (sizeof (struct GNUNET_MESH_TunnelMessage));
1205 msg->tunnel_id = htonl (t->id.tid);
1207 destroy_tunnel (c, t);
1208 return sizeof (struct GNUNET_MESH_TunnelMessage);
1214 * Send the message to all clients that have subscribed to its type
1216 * @param msg Pointer to the message itself
1217 * @return number of clients this message was sent to
1220 send_subscribed_clients (struct GNUNET_MessageHeader *msg)
1222 struct MeshClient *c;
1226 type = ntohs (msg->type);
1227 for (count = 0, c = clients; c != NULL; c = c->next)
1229 if (is_client_subscribed (type, c))
1232 GNUNET_SERVER_notification_context_unicast (nc, c->handle, msg,
1241 * Iterator over hash map peer entries collect all neighbors who to resend the
1244 * @param cls closure (**GNUNET_PEER_Id to store hops to send packet)
1245 * @param key current key code (peer id hash)
1246 * @param value value in the hash map (peer_info)
1247 * @return GNUNET_YES if we should continue to iterate, GNUNET_NO if not.
1250 iterate_collect_neighbors (void *cls, const GNUNET_HashCode * key, void *value)
1252 struct MeshPeerInfo *peer_info = value;
1253 GNUNET_PEER_Id **neighbors = cls;
1257 if (peer_info->id == myid)
1261 id = get_first_hop (peer_info->path);
1262 for (i = 0; *neighbors[i] != 0; i++)
1264 if (*neighbors[i] == id)
1267 *neighbors = GNUNET_realloc (*neighbors, (i + 2) * sizeof (GNUNET_PEER_Id));
1269 *neighbors[i + 1] = 0;
1275 /******************************************************************************/
1276 /******************** MESH NETWORK HANDLERS **************************/
1277 /******************************************************************************/
1281 * Core handler for path creation
1282 * struct GNUNET_CORE_MessageHandler
1284 * @param cls closure
1285 * @param message message
1286 * @param peer peer identity this notification is about
1287 * @param atsi performance data
1288 * @return GNUNET_OK to keep the connection open,
1289 * GNUNET_SYSERR to close it (signal serious error)
1293 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
1294 const struct GNUNET_MessageHeader *message,
1295 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1297 unsigned int own_pos;
1300 MESH_TunnelNumber tid;
1301 struct GNUNET_MESH_ManipulatePath *msg;
1302 struct GNUNET_PeerIdentity *pi;
1303 struct GNUNET_PeerIdentity id;
1304 GNUNET_HashCode hash;
1305 struct MeshPath *path;
1306 struct MeshPeerInfo *dest_peer_info;
1307 struct MeshPeerInfo *orig_peer_info;
1308 struct MeshTunnel *t;
1310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1311 "MESH: Received a MESH path create msg\n");
1312 size = ntohs (message->size);
1313 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
1315 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1316 "received create path message too short\n");
1320 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
1321 if (size < 2 * sizeof (struct GNUNET_PeerIdentity))
1323 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1324 "create path message lacks enough peers\n");
1327 if (size % sizeof (struct GNUNET_PeerIdentity))
1329 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1330 "create path message of wrong size\n");
1333 msg = (struct GNUNET_MESH_ManipulatePath *) message;
1334 size /= sizeof (struct GNUNET_PeerIdentity);
1336 tid = ntohl (msg->tid);
1337 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1338 t = retrieve_tunnel (pi, tid);
1342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
1343 t = GNUNET_malloc (sizeof (struct MeshTunnel));
1344 t->id.oid = GNUNET_PEER_intern (pi);
1346 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
1348 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1350 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
1351 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
1359 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
1360 if (NULL == dest_peer_info)
1362 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1363 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
1364 dest_peer_info->state = MESH_PEER_WAITING;
1365 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
1367 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1369 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
1370 if (NULL == orig_peer_info)
1372 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
1373 orig_peer_info->id = GNUNET_PEER_intern (pi);
1374 orig_peer_info->state = MESH_PEER_WAITING;
1375 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
1376 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1380 path = GNUNET_malloc (sizeof (struct MeshPath));
1381 path->length = size;
1382 path->peers = GNUNET_malloc (size * sizeof (GNUNET_PEER_Id));
1384 for (i = 0; i < size; i++)
1386 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
1387 if (path->peers[i] == myid)
1391 { /* cannot be self, must be 'not found' */
1392 /* create path: self not found in path through self */
1393 GNUNET_break_op (0);
1394 destroy_path (path);
1395 /* FIXME error. destroy tunnel? leave for timeout? */
1398 if (own_pos == size - 1)
1399 { /* it is for us! */
1400 struct MeshDataDescriptor *info;
1403 add_path_to_origin (orig_peer_info, path); /* inverts path! */
1404 GNUNET_PEER_resolve (get_first_hop (path), &id); /* path is inverted :) */
1405 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1406 info->origin = &t->id;
1407 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1408 GNUNET_assert (info->peer);
1409 for (j = 0; info->peer->core_transmit[j]; j++)
1417 info->handler_n = j;
1418 info->peer->core_transmit[j] =
1419 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1420 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1421 sizeof (struct GNUNET_MessageHeader),
1422 &send_core_path_ack, info);
1426 add_path_to_peer (dest_peer_info, path);
1427 GNUNET_PEER_resolve (get_first_hop (path), &id);
1428 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1429 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1430 sizeof (struct GNUNET_MessageHeader),
1431 &send_core_create_path_for_peer,
1439 * Core handler for mesh network traffic going from the origin to a peer
1441 * @param cls closure
1442 * @param message message
1443 * @param peer peer identity this notification is about
1444 * @param atsi performance data
1445 * @return GNUNET_OK to keep the connection open,
1446 * GNUNET_SYSERR to close it (signal serious error)
1449 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1450 const struct GNUNET_MessageHeader *message,
1451 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1453 struct GNUNET_MESH_Unicast *msg;
1454 struct GNUNET_PeerIdentity id;
1455 struct MeshTunnel *t;
1456 struct MeshPeerInfo *pi;
1459 size = ntohs (message->size);
1461 sizeof (struct GNUNET_MESH_Unicast) +
1462 sizeof (struct GNUNET_MessageHeader))
1467 msg = (struct GNUNET_MESH_Unicast *) message;
1468 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1471 /* TODO notify back: we don't know this tunnel */
1474 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
1475 &msg->destination.hashPubKey);
1478 /* TODO maybe feedback, log to statistics */
1483 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1486 GNUNET_PEER_resolve (get_first_hop (pi->path), &id);
1487 msg = GNUNET_malloc (size);
1488 memcpy (msg, message, size);
1489 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1490 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1491 &send_core_data_raw, msg);
1497 * Core handler for mesh network traffic going from the origin to all peers
1499 * @param cls closure
1500 * @param message message
1501 * @param peer peer identity this notification is about
1502 * @param atsi performance data
1503 * @return GNUNET_OK to keep the connection open,
1504 * GNUNET_SYSERR to close it (signal serious error)
1507 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
1508 const struct GNUNET_MessageHeader *message,
1509 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1511 struct GNUNET_MESH_Multicast *msg;
1512 struct GNUNET_PeerIdentity id;
1513 struct MeshTunnel *t;
1514 struct MeshDataDescriptor *info;
1515 GNUNET_PEER_Id *neighbors;
1521 size = ntohs (message->size);
1523 sizeof (struct GNUNET_MESH_Multicast) +
1524 sizeof (struct GNUNET_MessageHeader))
1526 GNUNET_break_op (0);
1529 msg = (struct GNUNET_MESH_Multicast *) message;
1530 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1534 /* TODO notify that we dont know that tunnel */
1538 /* Transmit to locally interested clients */
1539 GNUNET_PEER_resolve (myid, &id);
1540 if (GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
1542 send_subscribed_clients ((struct GNUNET_MessageHeader *) &msg[1]);
1545 /* Retransmit to other peers */
1546 neighbors = GNUNET_malloc (sizeof (GNUNET_PEER_Id));
1548 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &iterate_collect_neighbors,
1554 size -= sizeof (struct GNUNET_MESH_Multicast);
1555 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + size);
1556 info->origin = &t->id;
1558 for (i = 0; 0 != neighbors[i]; i++)
1560 GNUNET_PEER_resolve (neighbors[i], &id);
1562 info->destination = neighbors[i];
1563 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1564 GNUNET_assert (info->peer);
1565 for (j = 0; info->peer->core_transmit[j]; j++)
1573 info->handler_n = j;
1574 info->peer->infos[j] = info;
1575 info->peer->core_transmit[j] =
1576 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1577 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1578 ntohs (msg->header.size),
1579 &send_core_data_multicast, info);
1586 * Core handler for mesh network traffic
1588 * @param cls closure
1589 * @param message message
1590 * @param peer peer identity this notification is about
1591 * @param atsi performance data
1592 * @return GNUNET_OK to keep the connection open,
1593 * GNUNET_SYSERR to close it (signal serious error)
1596 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
1597 const struct GNUNET_MessageHeader *message,
1598 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1600 struct GNUNET_MESH_ToOrigin *msg;
1601 struct GNUNET_PeerIdentity id;
1602 struct MeshTunnel *t;
1603 struct MeshPeerInfo *peer_info;
1606 size = ntohs (message->size);
1608 sizeof (struct GNUNET_MESH_ToOrigin) +
1609 sizeof (struct GNUNET_MessageHeader))
1611 GNUNET_break_op (0);
1614 msg = (struct GNUNET_MESH_ToOrigin *) message;
1615 t = retrieve_tunnel (&msg->oid, ntohl (msg->tid));
1619 /* TODO notify that we dont know this tunnel (whom)? */
1623 if (t->id.oid == myid)
1625 if (NULL == t->client)
1627 /* got data packet for ownerless tunnel */
1628 GNUNET_break_op (0);
1631 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, message,
1635 peer_info = get_peer_info (&msg->oid);
1636 if (NULL == peer_info)
1638 /* unknown origin of tunnel */
1642 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1643 msg = GNUNET_malloc (size);
1644 memcpy (msg, message, size);
1645 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1646 GNUNET_TIME_UNIT_FOREVER_REL, &id, size,
1647 &send_core_data_raw, msg);
1654 * Core handler for path ACKs
1656 * @param cls closure
1657 * @param message message
1658 * @param peer peer identity this notification is about
1659 * @param atsi performance data
1660 * @return GNUNET_OK to keep the connection open,
1661 * GNUNET_SYSERR to close it (signal serious error)
1664 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
1665 const struct GNUNET_MessageHeader *message,
1666 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
1668 struct GNUNET_MESH_PathACK *msg;
1669 struct GNUNET_PeerIdentity id;
1670 struct MeshTunnel *t;
1671 struct MeshPeerInfo *peer_info;
1673 msg = (struct GNUNET_MESH_PathACK *) message;
1674 t = retrieve_tunnel (&msg->oid, msg->tid);
1677 /* TODO notify that we don't know the tunnel */
1681 /* Message for us? */
1682 if (GNUNET_PEER_search (&msg->oid) == myid)
1684 struct GNUNET_MESH_PeerControl pc;
1686 if (NULL == t->client)
1691 peer_info = get_peer_info (&msg->peer_id);
1692 if (NULL == peer_info)
1694 GNUNET_break_op (0);
1697 peer_info->state = MESH_PEER_READY;
1698 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1699 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1700 pc.tunnel_id = htonl (t->local_tid);
1701 GNUNET_PEER_resolve (peer_info->id, &pc.peer);
1702 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1703 &pc.header, GNUNET_NO);
1707 peer_info = get_peer_info (&msg->oid);
1708 if (NULL == peer_info)
1710 /* If we know the tunnel, we should DEFINITELY know the peer */
1714 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1715 msg = GNUNET_malloc (sizeof (struct GNUNET_MESH_PathACK));
1716 memcpy (msg, message, sizeof (struct GNUNET_MESH_PathACK));
1717 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1718 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1719 sizeof (struct GNUNET_MESH_PathACK),
1720 &send_core_data_raw, msg);
1726 * Functions to handle messages from core
1728 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
1729 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
1730 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
1731 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
1732 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
1733 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1734 sizeof (struct GNUNET_MESH_PathACK)},
1740 /******************************************************************************/
1741 /**************** MESH LOCAL HANDLER HELPERS ***********************/
1742 /******************************************************************************/
1745 * delete_tunnel_entry: iterator for deleting each tunnel that belongs to a
1746 * client when the client disconnects.
1747 * @param cls closure (client that is disconnecting)
1748 * @param key the hash of the local tunnel id (used to access the hashmap)
1749 * @param value the value stored at the key (tunnel to destroy)
1750 * @return GNUNET_OK on success
1753 delete_tunnel_entry (void *cls, const GNUNET_HashCode * key, void *value)
1757 r = destroy_tunnel ((struct MeshTunnel *) value);
1763 * notify_client_connection_failure: notify a client that the connection to the
1764 * requested remote peer is not possible (for instance, no route found)
1765 * Function called when the socket is ready to queue more data. "buf" will be
1766 * NULL and "size" zero if the socket was closed for writing in the meantime.
1768 * @param cls closure
1769 * @param size number of bytes available in buf
1770 * @param buf where the callee should write the message
1771 * @return number of bytes written to buf
1774 notify_client_connection_failure (void *cls, size_t size, void *buf)
1777 struct MeshPeerInfo *peer_info;
1778 struct GNUNET_MESH_PeerControl *msg;
1779 struct GNUNET_PeerIdentity id;
1781 if (0 == size && NULL == buf)
1783 // TODO retry? cancel?
1787 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
1788 peer_info = (struct MeshPeerInfo *) cls;
1789 msg = (struct GNUNET_MESH_PeerControl *) buf;
1790 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1791 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
1792 // msg->tunnel_id = htonl(peer_info->t->tid);
1793 GNUNET_PEER_resolve (peer_info->id, &id);
1794 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
1802 * Send keepalive packets for a peer
1808 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1810 struct MeshPeerInfo *peer_info = cls;
1811 struct GNUNET_PeerIdentity id;
1813 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
1815 GNUNET_PEER_resolve (get_first_hop (peer_info->path), &id);
1816 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1817 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1818 sizeof (struct GNUNET_MESH_ManipulatePath)
1820 (peer_info->path->length *
1821 sizeof (struct GNUNET_PeerIdentity)),
1822 &send_core_create_path_for_peer,
1824 peer_info->path_refresh_task =
1825 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh,
1832 * Function to process paths received for a new peer addition. The recorded
1833 * paths form the initial tunnel, which can be optimized later.
1834 * Called on each result obtained for the DHT search.
1836 * @param cls closure
1837 * @param exp when will this value expire
1838 * @param key key of the result
1839 * @param get_path NULL-terminated array of pointers
1840 * to the peers on reverse GET path (or NULL if not recorded)
1841 * @param put_path NULL-terminated array of pointers
1842 * to the peers on the PUT path (or NULL if not recorded)
1843 * @param type type of the result
1844 * @param size number of bytes in data
1845 * @param data pointer to the result data
1848 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1849 const GNUNET_HashCode * key,
1850 const struct GNUNET_PeerIdentity *const *get_path,
1851 const struct GNUNET_PeerIdentity *const *put_path,
1852 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
1854 struct MeshPeerInfo *peer_info = cls;
1856 struct GNUNET_PeerIdentity pi;
1859 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path)
1861 // Find ourselves some alternate initial path to the destination: retry
1862 GNUNET_DHT_get_stop (peer_info->dhtget);
1863 GNUNET_PEER_resolve (peer_info->id, &pi);
1864 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_BLOCK_TYPE_ANY, &pi.hashPubKey, 4, /* replication level */
1865 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
1868 0, /* xquery bits */
1870 (void *) peer_info);
1873 p = GNUNET_malloc (sizeof (struct MeshPath));
1874 for (i = 0; get_path[i] != NULL; i++) ;
1875 for (i--; i >= 0; i--)
1878 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1879 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1882 for (i = 0; put_path[i] != NULL; i++) ;
1883 for (i--; i >= 0; i--)
1886 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1887 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
1890 add_path_to_peer (peer_info, p);
1891 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1892 GNUNET_TIME_UNIT_FOREVER_REL, get_path[1],
1893 sizeof (struct GNUNET_MESH_ManipulatePath)
1896 sizeof (struct GNUNET_PeerIdentity)),
1897 &send_core_create_path_for_peer,
1899 if (0 == peer_info->path_refresh_task)
1901 peer_info->path_refresh_task =
1902 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh,
1910 * Function to process paths received for a new peer addition. The recorded
1911 * paths form the initial tunnel, which can be optimized later.
1912 * Called on each result obtained for the DHT search.
1914 * @param cls closure
1915 * @param exp when will this value expire
1916 * @param key key of the result
1917 * @param get_path NULL-terminated array of pointers
1918 * to the peers on reverse GET path (or NULL if not recorded)
1919 * @param put_path NULL-terminated array of pointers
1920 * to the peers on the PUT path (or NULL if not recorded)
1921 * @param type type of the result
1922 * @param size number of bytes in data
1923 * @param data pointer to the result data
1926 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1927 const GNUNET_HashCode * key,
1928 const struct GNUNET_PeerIdentity *const *get_path,
1929 const struct GNUNET_PeerIdentity *const *put_path,
1930 enum GNUNET_BLOCK_Type type, size_t size,
1933 const struct GNUNET_PeerIdentity *pi = data;
1934 struct MeshTunnel *t = cls;
1935 struct MeshPeerInfo *peer_info;
1940 if (size != sizeof (struct GNUNET_PeerIdentity))
1942 GNUNET_break_op (0);
1945 peer_info = get_peer_info (pi);
1946 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
1947 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1948 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path)
1950 /* we don't have a route to the peer, let's try a direct lookup */
1951 if (NULL == peer_info->dhtget)
1953 peer_info->dhtget = GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL, GNUNET_BLOCK_TYPE_ANY, &pi->hashPubKey, 10U, /* replication level */
1954 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
1957 0, /* xquery bits */
1958 dht_get_id_handler, peer_info);
1962 p = GNUNET_malloc (sizeof (struct MeshPath));
1963 for (i = 0; get_path[i] != NULL; i++) ;
1964 for (i--; i >= 0; i--)
1967 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1968 p->peers[p->length] = GNUNET_PEER_intern (get_path[i]);
1971 for (i = 0; put_path[i] != NULL; i++) ;
1972 for (i--; i >= 0; i--)
1975 GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * (p->length + 1));
1976 p->peers[p->length] = GNUNET_PEER_intern (put_path[i]);
1979 add_path_to_peer (peer_info, p);
1980 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1981 GNUNET_TIME_UNIT_FOREVER_REL, get_path[1],
1982 sizeof (struct GNUNET_MESH_ManipulatePath)
1985 sizeof (struct GNUNET_PeerIdentity)),
1986 &send_core_create_path_for_peer,
1991 /******************************************************************************/
1992 /********************* MESH LOCAL HANDLES **************************/
1993 /******************************************************************************/
1997 * Handler for client disconnection
1999 * @param cls closure
2000 * @param client identification of the client; NULL
2001 * for the last call when the server is destroyed
2004 handle_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
2006 struct MeshClient *c;
2007 struct MeshClient *next;
2011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
2015 if (c->handle != client)
2017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
2021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " matching client found, cleaning\n");
2022 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels, &delete_tunnel_entry, c);
2023 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
2024 if (0 != c->app_counter)
2026 /* deregister clients applications */
2027 for (i = 0; i < c->app_counter; i++)
2029 for (j = 0; j < n_apps; j++)
2031 if (c->apps[i] == applications[j] && 0 == --applications_rc[j])
2033 applications[j] = applications[n_apps - 1];
2034 GNUNET_array_grow(applications, n_apps, n_apps - 1);
2036 applications_rc[j] = applications_rc[n_apps - 1];
2037 GNUNET_array_grow(applications_rc, n_apps, n_apps - 1);
2043 GNUNET_free (c->apps);
2046 GNUNET_SCHEDULER_cancel (announce_applications_task);
2049 if (0 != c->type_counter)
2050 GNUNET_free (c->types);
2051 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
2057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
2063 * Handler for new clients
2065 * @param cls closure
2066 * @param client identification of the client
2067 * @param message the actual message, which includes messages the client wants
2070 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
2071 const struct GNUNET_MessageHeader *message)
2073 struct GNUNET_MESH_ClientConnect *cc_msg;
2074 struct MeshClient *c;
2082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
2083 /* Check data sanity */
2084 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
2085 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
2086 types = ntohs (cc_msg->types);
2087 apps = ntohs (cc_msg->applications);
2089 types * sizeof (uint16_t) + apps * sizeof (GNUNET_MESH_ApplicationType))
2092 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2096 /* Create new client structure */
2097 c = GNUNET_malloc (sizeof (struct MeshClient));
2101 c->type_counter = types;
2102 c->types = GNUNET_malloc (types * sizeof (uint16_t));
2103 memcpy (c->types, &message[1], types * sizeof (uint16_t));
2107 c->app_counter = apps;
2108 c->apps = GNUNET_malloc (apps * sizeof (GNUNET_MESH_ApplicationType));
2109 memcpy (c->apps, &message[1] + types * sizeof (uint16_t),
2110 apps * sizeof (GNUNET_MESH_ApplicationType));
2112 for (i = 0; i < apps; i++)
2115 for (j = 0; i < n_apps; j++)
2117 if (c->apps[i] == applications[j])
2120 applications_rc[j]++;
2126 /* Register previously unknown application */
2127 GNUNET_array_append(applications, n_apps, c->apps[i]);
2129 GNUNET_array_append(applications_rc, n_apps, 1);
2130 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
2132 announce_applications_task =
2133 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME,
2134 &announce_applications, NULL);
2138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2139 "MESH: client has %u+%u subscriptions\n", c->type_counter,
2142 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
2143 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2144 GNUNET_SERVER_notification_context_add (nc, client);
2146 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2152 * Handler for requests of new tunnels
2154 * @param cls closure
2155 * @param client identification of the client
2156 * @param message the actual message
2159 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
2160 const struct GNUNET_MessageHeader *message)
2162 struct GNUNET_MESH_TunnelMessage *t_msg;
2163 struct MeshTunnel *t;
2164 struct MeshClient *c;
2165 GNUNET_HashCode hash;
2167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
2169 /* Sanity check for client registration */
2170 if (NULL == (c = retrieve_client (client)))
2173 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2177 /* Message sanity check */
2178 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2181 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2185 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2186 /* Sanity check for tunnel numbering */
2187 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2190 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2193 /* Sanity check for duplicate tunnel IDs */
2194 if (NULL != retrieve_tunnel_by_local_id (c, ntohl (t_msg->tunnel_id)))
2197 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2201 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2202 while (NULL != retrieve_tunnel_by_pi (myid, next_tid))
2203 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
2204 t->id.tid = next_tid++;
2206 t->local_tid = ntohl (t_msg->tunnel_id);
2208 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
2210 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2212 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
2213 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2216 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2220 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2222 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2223 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2226 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2230 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2236 * Handler for requests of deleting tunnels
2238 * @param cls closure
2239 * @param client identification of the client
2240 * @param message the actual message
2243 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
2244 const struct GNUNET_MessageHeader *message)
2246 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
2247 struct MeshClient *c;
2248 struct MeshTunnel *t;
2249 MESH_TunnelNumber tid;
2250 GNUNET_HashCode hash;
2252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel\n");
2254 /* Sanity check for client registration */
2255 if (NULL == (c = retrieve_client (client)))
2258 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2261 /* Message sanity check */
2262 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
2265 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2269 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
2271 /* Retrieve tunnel */
2272 tid = ntohl (tunnel_msg->tunnel_id);
2274 /* Remove from local id hashmap */
2275 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2276 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
2277 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
2279 /* Remove from global id hashmap */
2280 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2281 GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t);
2283 // notify_tunnel_destroy(t);
2284 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2290 * Handler for connection requests to new peers
2292 * @param cls closure
2293 * @param client identification of the client
2294 * @param message the actual message (PeerControl)
2297 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
2298 const struct GNUNET_MessageHeader *message)
2300 struct GNUNET_MESH_PeerControl *peer_msg;
2301 struct MeshClient *c;
2302 struct MeshTunnel *t;
2303 MESH_TunnelNumber tid;
2304 struct MeshPeerInfo *peer_info;
2307 /* Sanity check for client registration */
2308 if (NULL == (c = retrieve_client (client)))
2311 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2315 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2316 /* Sanity check for message size */
2317 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2320 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2324 /* Tunnel exists? */
2325 tid = ntohl (peer_msg->tunnel_id);
2326 t = retrieve_tunnel_by_local_id (c, tid);
2330 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2334 /* Does client own tunnel? */
2335 if (t->client->handle != client)
2338 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2343 peer_info = get_peer_info (&peer_msg->peer);
2345 /* Start DHT search if needed */
2346 if (MESH_PEER_READY != peer_info->state && NULL == peer_info->dhtget)
2348 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 */
2349 GNUNET_DHT_RO_RECORD_ROUTE, NULL, /* bloom filter */
2352 0, /* xquery bits */
2354 (void *) peer_info);
2357 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2363 * Handler for disconnection requests of peers in a tunnel
2365 * @param cls closure
2366 * @param client identification of the client
2367 * @param message the actual message (PeerControl)
2370 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
2371 const struct GNUNET_MessageHeader *message)
2373 struct GNUNET_MESH_PeerControl *peer_msg;
2374 struct MeshClient *c;
2375 struct MeshTunnel *t;
2376 MESH_TunnelNumber tid;
2378 /* Sanity check for client registration */
2379 if (NULL == (c = retrieve_client (client)))
2382 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2385 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
2386 /* Sanity check for message size */
2387 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
2390 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2394 /* Tunnel exists? */
2395 tid = ntohl (peer_msg->tunnel_id);
2396 t = retrieve_tunnel_by_local_id (c, tid);
2400 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2404 /* Does client own tunnel? */
2405 if (t->client->handle != client)
2408 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2412 /* Ok, delete peer from tunnel */
2413 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
2414 &peer_msg->peer.hashPubKey);
2416 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2422 * Handler for connection requests to new peers by type
2424 * @param cls closure
2425 * @param client identification of the client
2426 * @param message the actual message (ConnectPeerByType)
2429 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
2430 const struct GNUNET_MessageHeader *message)
2432 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
2433 struct MeshClient *c;
2434 struct MeshTunnel *t;
2435 GNUNET_HashCode hash;
2436 GNUNET_MESH_ApplicationType type;
2437 MESH_TunnelNumber tid;
2438 uint8_t buffer[12] = "MESH_APP";
2442 /* Sanity check for client registration */
2443 if (NULL == (c = retrieve_client (client)))
2446 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2450 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
2451 /* Sanity check for message size */
2452 if (sizeof (struct GNUNET_MESH_PeerControl) !=
2453 ntohs (connect_msg->header.size))
2456 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2460 /* Tunnel exists? */
2461 tid = ntohl (connect_msg->tunnel_id);
2462 t = retrieve_tunnel_by_local_id (c, tid);
2466 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2470 /* Does client own tunnel? */
2471 if (t->client->handle != client)
2474 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2478 /* Do WE have the service? */
2479 type = ntohl (connect_msg->type);
2480 for (i = 0; i < n_apps; i++)
2482 if (applications[i] == type)
2484 /* Yes! Fast forward, add ourselves to the tunnel and send the
2485 * good news to the client
2487 struct GNUNET_MESH_PeerControl pc;
2489 GNUNET_PEER_resolve (myid, &pc.peer);
2490 GNUNET_CONTAINER_multihashmap_put (t->peers, &pc.peer.hashPubKey,
2491 get_peer_info (&pc.peer),
2492 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2493 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2494 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2495 pc.tunnel_id = htonl (t->local_tid);
2496 GNUNET_SERVER_notification_context_unicast (nc, client, NULL, GNUNET_NO);
2499 /* Ok, lets find a peer offering the service */
2500 p = (uint32_t *) & buffer[8];
2501 *p = connect_msg->type; /* Already in Network Byte Order! */
2502 GNUNET_CRYPTO_hash (buffer, 12, &hash);
2503 if (c->dht_get_type)
2505 GNUNET_DHT_get_stop (c->dht_get_type);
2508 GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
2509 GNUNET_BLOCK_TYPE_ANY, &hash, 10U,
2510 GNUNET_DHT_RO_RECORD_ROUTE, NULL, 0, NULL, 0,
2511 &dht_get_type_handler, t);
2513 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2519 * Handler for client traffic directed to one peer
2521 * @param cls closure
2522 * @param client identification of the client
2523 * @param message the actual message
2526 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
2527 const struct GNUNET_MessageHeader *message)
2529 struct MeshClient *c;
2530 struct MeshTunnel *t;
2531 struct MeshPeerInfo *pi;
2532 struct GNUNET_MESH_Unicast *data_msg;
2533 struct GNUNET_PeerIdentity next_hop;
2534 struct MeshDataDescriptor *info;
2535 MESH_TunnelNumber tid;
2538 /* Sanity check for client registration */
2539 if (NULL == (c = retrieve_client (client)))
2542 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2545 data_msg = (struct GNUNET_MESH_Unicast *) message;
2546 /* Sanity check for message size */
2547 if (sizeof (struct GNUNET_MESH_Unicast) +
2548 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
2551 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2555 /* Tunnel exists? */
2556 tid = ntohl (data_msg->tid);
2557 t = retrieve_tunnel_by_local_id (c, tid);
2561 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2565 /* Is it a local tunnel? Then, does client own the tunnel? */
2566 if (t->client->handle != NULL && t->client->handle != client)
2569 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2573 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
2574 &data_msg->destination.hashPubKey);
2575 /* Is the selected peer in the tunnel? */
2579 * Are we SO nice that we automatically try to add him to the tunnel?
2582 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2587 struct GNUNET_MESH_Unicast copy;
2589 memcpy (©, data_msg, sizeof (struct GNUNET_MESH_Unicast));
2591 handle_mesh_data_unicast (NULL, NULL, ©.header, NULL);
2594 GNUNET_PEER_resolve (get_first_hop (pi->path), &next_hop);
2595 data_size = ntohs (message->size) - sizeof (struct GNUNET_MESH_Unicast);
2596 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor) + data_size);
2597 memcpy (&info[1], &data_msg[1], data_size);
2598 info->destination = pi->id;
2599 info->origin = &t->id;
2600 info->size = data_size;
2601 info->client = client;
2602 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2603 GNUNET_TIME_UNIT_FOREVER_REL, &next_hop,
2604 /* FIXME re-check types */
2606 sizeof (struct GNUNET_MESH_Unicast),
2607 &send_core_data_unicast, info);
2612 * Handler for client traffic directed to all peers in a tunnel
2614 * @param cls closure
2615 * @param client identification of the client
2616 * @param message the actual message
2619 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
2620 const struct GNUNET_MessageHeader *message)
2622 struct MeshClient *c;
2623 struct MeshTunnel *t;
2624 struct GNUNET_MESH_Multicast *data_msg;
2625 MESH_TunnelNumber tid;
2627 /* Sanity check for client registration */
2628 if (NULL == (c = retrieve_client (client)))
2631 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2634 data_msg = (struct GNUNET_MESH_Multicast *) message;
2635 /* Sanity check for message size */
2636 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (data_msg->header.size))
2639 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2643 /* Tunnel exists? */
2644 tid = ntohl (data_msg->tid);
2645 t = retrieve_tunnel_by_local_id (c, tid);
2649 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2653 /* Does client own tunnel? */
2654 if (t->client->handle != client)
2657 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
2663 GNUNET_SERVER_receive_done (client, GNUNET_OK);
2668 * Functions to handle messages from clients
2670 static struct GNUNET_SERVER_MessageHandler plugin_handlers[] = {
2671 {&handle_local_new_client, NULL, GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
2672 {&handle_local_tunnel_create, NULL,
2673 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
2674 sizeof (struct GNUNET_MESH_TunnelMessage)},
2675 {&handle_local_tunnel_destroy, NULL,
2676 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
2677 sizeof (struct GNUNET_MESH_TunnelMessage)},
2678 {&handle_local_connect_add, NULL,
2679 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
2680 sizeof (struct GNUNET_MESH_PeerControl)},
2681 {&handle_local_connect_del, NULL,
2682 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
2683 sizeof (struct GNUNET_MESH_PeerControl)},
2684 {&handle_local_connect_by_type, NULL,
2685 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
2686 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
2687 {&handle_local_unicast, NULL,
2688 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2689 {&handle_local_unicast, NULL,
2690 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2691 {&handle_local_multicast, NULL,
2692 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2698 * To be called on core init/fail.
2700 * @param cls service closure
2701 * @param server handle to the server for this service
2702 * @param identity the public identity of this peer
2703 * @param publicKey the public key of this peer
2706 core_init (void *cls, struct GNUNET_CORE_Handle *server,
2707 const struct GNUNET_PeerIdentity *identity,
2708 const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
2711 core_handle = server;
2712 myid = GNUNET_PEER_intern (identity);
2713 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
2718 * Method called whenever a given peer connects.
2720 * @param cls closure
2721 * @param peer peer identity this notification is about
2722 * @param atsi performance data for the connection
2725 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
2726 const struct GNUNET_TRANSPORT_ATS_Information *atsi)
2728 // GNUNET_PEER_Id pid;
2729 struct MeshPeerInfo *peer_info;
2730 struct MeshPath *path;
2732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
2733 peer_info = get_peer_info (peer);
2734 if (myid == peer_info->id)
2736 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
2738 path = GNUNET_malloc (sizeof (struct MeshPath));
2740 path->peers = GNUNET_malloc (sizeof (GNUNET_PEER_Id) * 2);
2741 path->peers[0] = myid;
2742 path->peers[1] = peer_info->id;
2743 add_path_to_peer (peer_info, path);
2748 * Method called whenever a peer disconnects.
2750 * @param cls closure
2751 * @param peer peer identity this notification is about
2754 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
2756 struct MeshPeerInfo *pi;
2759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
2760 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2766 for (i = 0; i < CORE_QUEUE_SIZE; i++)
2768 if (pi->core_transmit[i])
2770 GNUNET_CORE_notify_transmit_ready_cancel (pi->core_transmit[i]);
2771 /* TODO: notify that tranmission has failed */
2772 GNUNET_free (pi->infos[i]);
2777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
2783 /******************************************************************************/
2784 /************************ MAIN FUNCTIONS ****************************/
2785 /******************************************************************************/
2788 * Task run during shutdown.
2794 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
2797 if (core_handle != NULL)
2799 GNUNET_CORE_disconnect (core_handle);
2802 if (dht_handle != NULL)
2804 GNUNET_DHT_disconnect (dht_handle);
2809 GNUNET_SERVER_notification_context_destroy (nc);
2812 if (0 != announce_id_task)
2814 GNUNET_SCHEDULER_cancel (announce_id_task);
2815 announce_id_task = 0;
2817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
2821 * Process mesh requests.
2823 * @param cls closure
2824 * @param server the initialized server
2825 * @param c configuration to use
2828 run (void *cls, struct GNUNET_SERVER_Handle *server,
2829 const struct GNUNET_CONFIGURATION_Handle *c)
2831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
2832 GNUNET_SERVER_add_handlers (server, plugin_handlers);
2833 GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
2834 server_handle = server;
2835 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
2836 CORE_QUEUE_SIZE, /* queue size */
2837 NULL, /* Closure passed to MESH functions */
2838 &core_init, /* Call core_init once connected */
2839 &core_connect, /* Handle connects */
2840 &core_disconnect, /* remove peers on disconnects */
2841 NULL, /* Do we care about "status" updates? */
2842 NULL, /* Don't notify about all incoming messages */
2843 GNUNET_NO, /* For header only in notification */
2844 NULL, /* Don't notify about all outbound messages */
2845 GNUNET_NO, /* For header-only out notification */
2846 core_handlers); /* Register these handlers */
2847 if (core_handle == NULL)
2851 dht_handle = GNUNET_DHT_connect (c, 64);
2852 if (dht_handle == NULL)
2854 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Error connecting to DHT.\
2855 Running without DHT has a severe\
2856 impact in MESH capabilities.\n\
2857 Plase check your configuretion and enable DHT.\n");
2863 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
2864 peers = GNUNET_CONTAINER_multihashmap_create (32);
2865 nc = GNUNET_SERVER_notification_context_create (server_handle,
2868 clients_tail = NULL;
2870 applications = NULL;
2871 applications_rc = NULL;
2873 announce_applications_task = 0;
2875 /* Scheduled the task to clean up when shutdown is called */
2876 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
2879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
2883 * The main function for the mesh service.
2885 * @param argc number of arguments from the command line
2886 * @param argv command line arguments
2887 * @return 0 ok, 1 on error
2890 main (int argc, char *const *argv)
2894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
2897 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
2899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");