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.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - relay corking down to core
48 #include "mesh_protocol.h"
49 #include "gnunet_dht_service.h"
50 #include "mesh_tunnel_tree.h"
52 /* TODO: move into configuration file */
53 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
54 GNUNET_TIME_UNIT_SECONDS,\
56 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
57 GNUNET_TIME_UNIT_SECONDS,\
60 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
61 GNUNET_TIME_UNIT_SECONDS,\
64 #define GET_RESTART_TIME GNUNET_TIME_relative_multiply(\
65 GNUNET_TIME_UNIT_SECONDS,\
68 #define UNACKNOWLEDGED_WAIT GNUNET_TIME_relative_multiply(\
69 GNUNET_TIME_UNIT_SECONDS,\
72 /******************************************************************************/
73 /************************ DATA STRUCTURES ****************************/
74 /******************************************************************************/
76 /** FWD declaration */
80 * Struct containing all info possibly needed to build a package when called
83 struct MeshDataDescriptor
85 /** ID of the tunnel this packet travels in */
86 struct MESH_TunnelID *origin;
91 /** Client that asked for the transmission, if any */
92 struct GNUNET_SERVER_Client *client;
94 /** Who was this message being sent to */
95 struct MeshPeerInfo *peer;
97 /** Ultimate destination of the packet */
98 GNUNET_PEER_Id destination;
100 /** Number of identical messages sent to different hops (multicast) */
101 unsigned int *copies;
103 /** Which handler was used to request the transmission */
104 unsigned int handler_n;
106 /** Size of the data */
109 /** Used to allow a client send more traffic to the service after a
110 * previous packet was tried to be sent to a neighbor and couldn't */
111 GNUNET_SCHEDULER_TaskIdentifier *timeout_task;
116 * Struct containing all information regarding a given peer
126 * Last time we heard from this peer
128 struct GNUNET_TIME_Absolute last_contact;
131 * Number of attempts to reconnect so far
133 int n_reconnect_attempts;
136 * Paths to reach the peer, ordered by ascending hop count
138 struct MeshPeerPath *path_head;
141 * Paths to reach the peer, ordered by ascending hop count
143 struct MeshPeerPath *path_tail;
146 * Handle to stop the DHT search for a path to this peer
148 struct GNUNET_DHT_GetHandle *dhtget;
151 * Closure given to the DHT GET
153 struct MeshPathInfo *dhtgetcls;
156 * Handles to stop queued transmissions for this peer
158 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
161 * Pointer to info stuctures used as cls for queued transmissions
163 void *infos[CORE_QUEUE_SIZE];
166 * Type of message being in each transmission
168 uint16_t types[CORE_QUEUE_SIZE];
171 * Array of tunnels this peer participates in
172 * (most probably a small amount, therefore not a hashmap)
173 * When the path to the peer changes, notify these tunnels to let them
174 * re-adjust their path trees.
176 struct MeshTunnel **tunnels;
179 * Number of tunnels this peers participates in
181 unsigned int ntunnels;
186 * Data scheduled to transmit (to local client or remote peer)
193 struct MeshQueue *next;
194 struct MeshQueue *prev;
197 * Target of the data (NULL if target is client)
199 struct MeshPeerInfo *peer;
202 * Client to send the data to (NULL if target is peer)
204 struct MeshClient *client;
207 * Size of the message to transmit
212 * How old is the data?
214 struct GNUNET_TIME_Absolute timestamp;
219 struct GNUNET_MessageHeader *data;
223 * Globally unique tunnel identification (owner + number)
224 * DO NOT USE OVER THE NETWORK
229 * Node that owns the tunnel
234 * Tunnel number to differentiate all the tunnels owned by the node oid
235 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
237 MESH_TunnelNumber tid;
241 struct MeshClient; /* FWD declaration */
244 * Struct containing all information regarding a tunnel
245 * For an intermediate node the improtant info used will be:
246 * - id Tunnel unique identification
247 * - paths[0] To know where to send it next
248 * - metainfo: ready, speeds, accounting
255 struct MESH_TunnelID id;
258 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
260 MESH_TunnelNumber local_tid;
263 * Last time the tunnel was used
265 struct GNUNET_TIME_Absolute timestamp;
268 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
269 * containing peers added by id or by type, not intermediate peers.
271 struct GNUNET_CONTAINER_MultiHashMap *peers;
274 * Number of peers that are connected and potentially ready to receive data
276 unsigned int peers_ready;
279 * Number of peers that have been added to the tunnel
281 unsigned int peers_total;
284 * Client owner of the tunnel, if any
286 struct MeshClient *client;
289 * Messages ready to transmit
291 struct MeshQueue *queue_head;
292 struct MeshQueue *queue_tail;
297 struct MeshTunnelTree *tree;
300 * Application type we are looking for in this tunnel
302 GNUNET_MESH_ApplicationType type;
305 * Used to search peers offering a service
307 struct GNUNET_DHT_GetHandle *dht_get_type;
310 * Task to keep the used paths alive
312 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
315 * Task to destroy the tunnel after timeout
317 * FIXME: merge the two? a tunnel will have either
318 * a path refresh OR a timeout, never both!
320 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
325 * Info needed to work with tunnel paths and peers
332 struct MeshTunnel *t;
335 * Neighbouring peer to whom we send the packet to
337 struct MeshPeerInfo *peer;
342 struct MeshPeerPath *path;
345 * Position in peer's transmit queue
352 * Struct containing information about a client of the service
359 struct MeshClient *next;
360 struct MeshClient *prev;
363 * Tunnels that belong to this client, indexed by local id
365 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
368 * Handle to communicate with the client
370 struct GNUNET_SERVER_Client *handle;
373 * Applications that this client has claimed to provide
375 struct GNUNET_CONTAINER_MultiHashMap *apps;
378 * Messages that this client has declared interest in
380 struct GNUNET_CONTAINER_MultiHashMap *types;
384 * ID of the client, for debug messages
393 /******************************************************************************/
394 /************************ DEBUG FUNCTIONS ****************************/
395 /******************************************************************************/
399 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
400 * @param cls string to print
401 * @param tc task context
404 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
408 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
416 /******************************************************************************/
417 /*********************** GLOBAL VARIABLES ****************************/
418 /******************************************************************************/
423 static struct MeshClient *clients;
424 static struct MeshClient *clients_tail;
427 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
429 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
432 * Tunnels incoming, indexed by MESH_TunnelNumber
433 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
435 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
438 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
440 static struct GNUNET_CONTAINER_MultiHashMap *peers;
443 * Handle to communicate with core
445 static struct GNUNET_CORE_Handle *core_handle;
448 * Handle to communicate with transport
450 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
455 static struct GNUNET_DHT_Handle *dht_handle;
460 static struct GNUNET_SERVER_Handle *server_handle;
463 * Notification context, to send messages to local clients
465 static struct GNUNET_SERVER_NotificationContext *nc;
468 * Local peer own ID (memory efficient handle)
470 static GNUNET_PEER_Id myid;
473 * Local peer own ID (full value)
475 static struct GNUNET_PeerIdentity my_full_id;
480 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
485 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
488 * Tunnel ID for the next created tunnel (global tunnel number)
490 static MESH_TunnelNumber next_tid;
493 * Tunnel ID for the next incoming tunnel (local tunnel number)
495 static MESH_TunnelNumber next_local_tid;
498 * All application types provided by this peer
500 static struct GNUNET_CONTAINER_MultiHashMap *applications;
503 * All message types clients of this peer are interested in
505 static struct GNUNET_CONTAINER_MultiHashMap *types;
508 * Task to periodically announce provided applications
510 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
513 * Task to periodically announce itself in the network
515 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
518 unsigned int next_client_id;
522 /******************************************************************************/
523 /************************ ITERATORS ****************************/
524 /******************************************************************************/
526 /* FIXME move iterators here */
529 /******************************************************************************/
530 /************************ PERIODIC FUNCTIONS ****************************/
531 /******************************************************************************/
534 * Announce iterator over for each application provided by the peer
537 * @param key current key code
538 * @param value value in the hash map
539 * @return GNUNET_YES if we should continue to
544 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
546 /* FIXME are hashes in multihash map equal on all aquitectures? */
547 GNUNET_DHT_put (dht_handle,
550 GNUNET_DHT_RO_RECORD_ROUTE |
551 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
552 GNUNET_BLOCK_TYPE_TEST,
553 sizeof (struct GNUNET_PeerIdentity),
554 (const char *) &my_full_id,
556 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
557 &mesh_debug, "DHT_put for app completed");
559 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
561 APP_ANNOUNCE_TIME, NULL, NULL);
568 * Periodically announce what applications are provided by local clients
571 * @param tc task context
574 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
576 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
578 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
582 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
584 announce_applications_task =
585 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
593 * Periodically announce self id in the DHT
596 * @param tc task context
599 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
601 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
603 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
607 * - Set data expiration in function of X
610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
611 GNUNET_i2s (&my_full_id));
612 GNUNET_DHT_put (dht_handle, /* DHT handle */
613 &my_full_id.hashPubKey, /* Key to use */
614 10U, /* Replication level */
615 GNUNET_DHT_RO_RECORD_ROUTE |
616 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
617 GNUNET_BLOCK_TYPE_TEST, /* Block type */
618 sizeof(my_full_id), /* Size of the data */
619 (char *)&my_full_id, /* Data itself */
620 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
621 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
623 &mesh_debug, "DHT_put for id completed");
625 NULL, /* Continuation */
626 NULL); /* Continuation closure */
629 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
634 * Function to process paths received for a new peer addition. The recorded
635 * paths form the initial tunnel, which can be optimized later.
636 * Called on each result obtained for the DHT search.
639 * @param exp when will this value expire
640 * @param key key of the result
641 * @param type type of the result
642 * @param size number of bytes in data
643 * @param data pointer to the result data
646 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
647 const GNUNET_HashCode * key,
648 const struct GNUNET_PeerIdentity *get_path,
649 unsigned int get_path_length,
650 const struct GNUNET_PeerIdentity *put_path,
651 unsigned int put_path_length,
652 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
655 /******************************************************************************/
656 /****************** GENERAL HELPER FUNCTIONS ************************/
657 /******************************************************************************/
660 * Check if client has registered with the service and has not disconnected
662 * @param client the client to check
664 * @return non-NULL if client exists in the global DLL
666 static struct MeshClient *
667 client_get (struct GNUNET_SERVER_Client *client)
669 struct MeshClient *c;
674 if (c->handle == client)
683 * Checks if a given client has subscribed to certain message type
685 * @param message_type Type of message to check
686 * @param c Client to check
688 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
693 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
697 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
698 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
703 * Allow a client to send more data after transmitting a multicast message
704 * which some neighbor has not yet accepted altough a reasonable time has
707 * @param cls Closure (DataDescriptor containing the task identifier)
708 * @param tc Task Context
711 client_allow_send(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
713 struct MeshDataDescriptor *info = cls;
715 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
718 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
719 "MESH: CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
722 *(info->timeout_task) = GNUNET_SCHEDULER_NO_TASK;
723 GNUNET_SERVER_receive_done(info->client, GNUNET_OK);
728 * Search for a tunnel by global ID using full PeerIdentities
730 * @param oid owner of the tunnel
731 * @param tid global tunnel number
733 * @return tunnel handler, NULL if doesn't exist
735 static struct MeshTunnel *
736 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
740 * Notify a tunnel that a connection has broken that affects at least
743 * @param t Tunnel affected.
744 * @param p1 Peer that got disconnected from p2.
745 * @param p2 Peer that got disconnected from p1.
747 * @return Short ID of the peer disconnected (either p1 or p2).
748 * 0 if the tunnel remained unaffected.
750 static GNUNET_PEER_Id
751 tunnel_notify_connection_broken (struct MeshTunnel *t,
757 * Send the message to all clients that have subscribed to its type
759 * @param msg Pointer to the message itself
760 * @return number of clients this message was sent to
763 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
764 const struct GNUNET_MessageHeader *payload)
766 struct GNUNET_PeerIdentity *oid;
767 struct MeshClient *c;
768 struct MeshTunnel *t;
769 MESH_TunnelNumber *tid;
772 char cbuf[htons(msg->size)];
774 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Sending to clients...\n");
775 type = ntohs (payload->type);
776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message of type %u\n", type);
778 memcpy (cbuf, msg, sizeof(cbuf));
779 switch (htons(msg->type))
781 struct GNUNET_MESH_Unicast *uc;
782 struct GNUNET_MESH_Multicast *mc;
783 struct GNUNET_MESH_ToOrigin *to;
785 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
786 uc = (struct GNUNET_MESH_Unicast *) cbuf;
790 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
791 mc = (struct GNUNET_MESH_Multicast *) cbuf;
795 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
796 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
804 t = tunnel_get (oid, ntohl(*tid));
810 *tid = htonl (t->local_tid);
811 for (count = 0, c = clients; c != NULL; c = c->next)
813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client %u\n", c->id);
814 if (client_is_subscribed (type, c))
817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending\n");
818 GNUNET_SERVER_notification_context_unicast (
821 (struct GNUNET_MessageHeader *) cbuf,
830 * Notify the client that owns the tunnel that a peer has connected to it
831 * (the requested path to it has been confirmed).
833 * @param t Tunnel whose owner to notify
834 * @param id Short id of the peer that has connected
837 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
839 struct GNUNET_MESH_PeerControl pc;
841 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
842 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
843 pc.tunnel_id = htonl (t->local_tid);
844 GNUNET_PEER_resolve (id, &pc.peer);
845 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
846 &pc.header, GNUNET_NO);
851 * Notify all clients (not depending on registration status) that the incoming
852 * tunnel is no longer valid.
854 * @param t Tunnel that was destroyed.
857 send_clients_tunnel_destroy (struct MeshTunnel *t)
859 struct GNUNET_MESH_TunnelMessage msg;
861 msg.header.size = htons (sizeof (msg));
862 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
863 msg.tunnel_id = htonl (t->local_tid);
864 GNUNET_SERVER_notification_context_broadcast(nc, &msg.header, GNUNET_NO);
869 * Function called to notify a client about the socket
870 * being ready to queue more data. "buf" will be
871 * NULL and "size" zero if the socket was closed for
872 * writing in the meantime.
875 * @param size number of bytes available in buf
876 * @param buf where the callee should write the message
877 * @return number of bytes written to buf
880 send_core_create_path (void *cls, size_t size, void *buf);
884 * Function called to notify a client about the socket
885 * being ready to queue more data. "buf" will be
886 * NULL and "size" zero if the socket was closed for
887 * writing in the meantime.
889 * @param cls closure (data itself)
890 * @param size number of bytes available in buf
891 * @param buf where the callee should write the message
893 * @return number of bytes written to buf
896 send_core_data_multicast (void *cls, size_t size, void *buf);
900 * Decrements the reference counter and frees all resources if needed
902 * @param dd Data Descriptor used in a multicast message
905 data_descriptor_decrement_multicast (struct MeshDataDescriptor *dd)
907 if (0 == --(*(dd->copies)))
909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
910 if (NULL != dd->client)
912 if (GNUNET_SCHEDULER_NO_TASK != *(dd->timeout_task))
914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
915 "MESH: cancelling client timeout (%u)...\n",
916 *(dd->timeout_task));
917 GNUNET_SCHEDULER_cancel(*(dd->timeout_task));
918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
919 GNUNET_SERVER_receive_done (dd->client, GNUNET_OK);
921 GNUNET_free (dd->timeout_task);
923 GNUNET_free (dd->copies);
924 GNUNET_free (dd->data);
930 * Cancel a core transmission that was already requested and free all resources
931 * associated to the request.
933 * @param peer PeeInfo of the peer whose transmission is cancelled.
934 * @param i Position of the transmission to be cancelled.
937 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
939 if (NULL != peer->core_transmit[i])
941 struct MeshDataDescriptor *dd;
942 struct MeshPathInfo *path_info;
946 struct GNUNET_PeerIdentity id;
948 GNUNET_PEER_resolve (peer->id, &id);
949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
950 "MESH: Cancelling data transmission at %s [%u]\n",
953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
954 "MESH: message type %u\n",
958 /* TODO: notify that tranmission has failed */
959 switch (peer->types[i])
961 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
962 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
963 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
966 data_descriptor_decrement_multicast (dd);
968 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
970 path_info = peer->infos[i];
971 path_destroy(path_info->path);
975 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
977 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
978 peer->core_transmit[i] = NULL;
979 GNUNET_free (peer->infos[i]);
985 * Get a unused CORE slot to transmit a message to a peer. If all the slots
986 * are used, cancel one and return it's position.
988 * @param peer PeerInfo of the neighbor we want to transmit to.
990 * @return The index of an available slot to transmit to the neighbor.
993 peer_info_transmit_slot (struct MeshPeerInfo *peer)
997 for (i = 0; peer->core_transmit[i]; i++)
999 if (i == (CORE_QUEUE_SIZE - 1))
1001 /* All positions are taken! Overwriting! */
1003 peer_info_cancel_transmission(peer, 0);
1012 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1013 * and insert it in the appropiate structures if the peer is not known yet.
1015 * @param peer Full identity of the peer.
1017 * @return Existing or newly created peer info.
1019 static struct MeshPeerInfo *
1020 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1022 struct MeshPeerInfo *peer_info;
1024 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1025 if (NULL == peer_info)
1028 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1029 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1030 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1031 peer_info->id = GNUNET_PEER_intern (peer);
1039 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1040 * and insert it in the appropiate structures if the peer is not known yet.
1042 * @param peer Short identity of the peer.
1044 * @return Existing or newly created peer info.
1046 static struct MeshPeerInfo *
1047 peer_info_get_short (const GNUNET_PEER_Id peer)
1049 struct GNUNET_PeerIdentity id;
1051 GNUNET_PEER_resolve(peer, &id);
1052 return peer_info_get(&id);
1057 * Iterator to remove the tunnel from the list of tunnels a peer participates
1060 * @param cls Closure (tunnel info)
1061 * @param key GNUNET_PeerIdentity of the peer (unused)
1062 * @param value PeerInfo of the peer
1064 * @return always GNUNET_YES, to keep iterating
1067 peer_info_delete_tunnel (void* cls, const GNUNET_HashCode* key, void* value)
1069 struct MeshTunnel *t = cls;
1070 struct MeshPeerInfo *peer = value;
1073 for (i = 0; i < peer->ntunnels; i++)
1075 if (0 == memcmp(&peer->tunnels[i]->id,
1077 sizeof(struct MESH_TunnelID)))
1080 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1081 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1090 * Core callback to write a
1092 * @param cls Closure (MeshDataDescriptor with data in "data" member).
1093 * @param size Number of bytes available in buf.
1094 * @param buf Where the to write the message.
1096 * @return number of bytes written to buf
1099 send_core_data_raw (void *cls, size_t size, void *buf)
1101 struct MeshDataDescriptor *info = cls;
1102 struct GNUNET_MessageHeader *msg;
1105 GNUNET_assert (NULL != info);
1106 GNUNET_assert (NULL != info->data);
1107 msg = (struct GNUNET_MessageHeader *) info->data;
1108 total_size = ntohs (msg->size);
1110 if (total_size > size)
1112 struct GNUNET_PeerIdentity id;
1114 GNUNET_PEER_resolve (info->peer->id, &id);
1115 info->peer->core_transmit[info->handler_n] =
1116 GNUNET_CORE_notify_transmit_ready(core_handle,
1119 GNUNET_TIME_UNIT_FOREVER_REL,
1122 &send_core_data_raw,
1126 info->peer->core_transmit[info->handler_n] = NULL;
1127 memcpy (buf, msg, total_size);
1128 GNUNET_free (info->data);
1135 * Sends an already built message to a peer, properly registrating
1136 * all used resources.
1138 * @param message Message to send. Fucntion makes a copy of it.
1139 * @param peer Short ID of the neighbor whom to send the message.
1142 send_message (const struct GNUNET_MessageHeader *message,
1143 const struct GNUNET_PeerIdentity *peer)
1145 struct MeshDataDescriptor *info;
1146 struct MeshPeerInfo *neighbor;
1147 struct MeshPeerPath *p;
1151 // GNUNET_TRANSPORT_try_connect();
1153 size = ntohs (message->size);
1154 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1155 info->data = GNUNET_malloc (size);
1156 memcpy (info->data, message, size);
1157 neighbor = peer_info_get (peer);
1158 for (p = neighbor->path_head; NULL != p; p = p->next)
1170 i = peer_info_transmit_slot (neighbor);
1171 info->handler_n = i;
1172 info->peer = neighbor;
1173 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1174 neighbor->infos[i] = info;
1175 neighbor->core_transmit[i] =
1176 GNUNET_CORE_notify_transmit_ready(core_handle,
1179 GNUNET_TIME_UNIT_FOREVER_REL,
1182 &send_core_data_raw,
1189 * Sends a CREATE PATH message for a path to a peer, properly registrating
1190 * all used resources.
1192 * @param peer PeerInfo of the final peer for whom this path is being created.
1193 * @param p Path itself.
1194 * @param t Tunnel for which the path is created.
1197 send_create_path (struct MeshPeerInfo *peer,
1198 struct MeshPeerPath *p,
1199 struct MeshTunnel *t)
1201 struct GNUNET_PeerIdentity id;
1202 struct MeshPathInfo *path_info;
1203 struct MeshPeerInfo *neighbor;
1208 p = tree_get_path_to_peer(t->tree, peer->id);
1215 for (i = 0; i < p->length; i++)
1217 if (p->peers[i] == myid)
1220 if (i >= p->length - 1)
1226 GNUNET_PEER_resolve(p->peers[i + 1], &id);
1228 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1229 path_info->path = p;
1231 neighbor = peer_info_get(&id);
1232 path_info->peer = neighbor;
1233 path_info->pos = peer_info_transmit_slot(neighbor);
1234 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1235 neighbor->infos[path_info->pos] = path_info;
1236 neighbor->core_transmit[path_info->pos] =
1237 GNUNET_CORE_notify_transmit_ready (
1238 core_handle, /* handle */
1241 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1243 sizeof (struct GNUNET_MESH_ManipulatePath)
1244 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1245 &send_core_create_path, /* callback */
1246 path_info); /* cls */
1251 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1253 * @param t Tunnel whose path to destroy.
1254 * @param destination Short ID of the peer to whom the path to destroy.
1257 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1259 struct MeshPeerPath *p;
1262 p = tree_get_path_to_peer(t->tree, destination);
1268 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1269 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1271 struct GNUNET_MESH_ManipulatePath *msg;
1272 struct GNUNET_PeerIdentity *pi;
1276 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1277 msg->header.size = htons (size);
1278 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1279 msg->tid = htonl (t->id.tid);
1280 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1281 for (i = 0; i < p->length; i++)
1283 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1285 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1292 * Try to establish a new connection to this peer.
1293 * Use the best path for the given tunnel.
1294 * If the peer doesn't have any path to it yet, try to get one.
1295 * If the peer already has some path, send a CREATE PATH towards it.
1297 * @param peer PeerInfo of the peer.
1298 * @param t Tunnel for which to create the path, if possible.
1301 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1303 struct MeshPeerPath *p;
1304 struct MeshPathInfo *path_info;
1306 if (NULL != peer->path_head)
1308 p = tree_get_path_to_peer(t->tree, peer->id);
1317 send_create_path(peer, p, t);
1322 send_client_peer_connected(t, myid);
1325 else if (NULL == peer->dhtget)
1327 struct GNUNET_PeerIdentity id;
1329 GNUNET_PEER_resolve(peer->id, &id);
1330 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1331 path_info->peer = peer;
1333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1334 "MESH: Starting DHT GET for peer %s\n",
1336 peer->dhtgetcls = path_info;
1338 GNUNET_DHT_get_start(dht_handle, /* handle */
1339 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1340 GNUNET_BLOCK_TYPE_TEST, /* type */
1341 &id.hashPubKey, /* key to search */
1342 4, /* replication level */
1343 GNUNET_DHT_RO_RECORD_ROUTE |
1344 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1346 0, /* xquery bits */
1347 &dht_get_id_handler,
1350 /* Otherwise, there is no path but the DHT get is already started. */
1355 * Task to delay the connection of a peer
1357 * @param cls Closure (path info with tunnel and peer to connect).
1358 * Will be free'd on exection.
1359 * @param tc TaskContext
1362 peer_info_connect_task (void *cls,
1363 const struct GNUNET_SCHEDULER_TaskContext *tc)
1365 struct MeshPathInfo *path_info = cls;
1367 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1372 peer_info_connect (path_info->peer, path_info->t);
1378 * Destroy the peer_info and free any allocated resources linked to it
1380 * @param pi The peer_info to destroy.
1382 * @return GNUNET_OK on success
1385 peer_info_destroy (struct MeshPeerInfo *pi)
1387 struct GNUNET_PeerIdentity id;
1388 struct MeshPeerPath *p;
1389 struct MeshPeerPath *nextp;
1392 GNUNET_PEER_resolve (pi->id, &id);
1393 GNUNET_PEER_change_rc (pi->id, -1);
1396 GNUNET_CONTAINER_multihashmap_remove (peers,&id.hashPubKey, pi))
1399 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1400 "MESH: removing peer %s, not in hashmap\n",
1403 if (NULL != pi->dhtget)
1405 GNUNET_DHT_get_stop(pi->dhtget);
1406 GNUNET_free (pi->dhtgetcls);
1408 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1410 peer_info_cancel_transmission(pi, i);
1416 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1426 * Remove all paths that rely on a direct connection between p1 and p2
1427 * from the peer itself and notify all tunnels about it.
1429 * @param peer PeerInfo of affected peer.
1430 * @param p1 GNUNET_PEER_Id of one peer.
1431 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1434 * TODO: optimize (see below)
1437 path_remove_from_peer (struct MeshPeerInfo *peer,
1441 struct MeshPeerPath *p;
1442 struct MeshPeerPath *aux;
1443 struct MeshPeerInfo *peer_d;
1445 unsigned int destroyed;
1451 p = peer->path_head;
1455 for (i = 0; i < (p->length - 1); i++)
1457 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1458 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1460 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1471 for (i = 0; i < peer->ntunnels; i++)
1473 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1475 * Problem: one or more peers have been deleted from the tunnel tree.
1476 * We don't know who they are to try to add them again.
1477 * We need to try to find a new path for each of the disconnected peers.
1478 * Some of them might already have a path to reach them that does not
1479 * involve p1 and p2. Adding all anew might render in a better tree than
1480 * the trivial immediate fix.
1482 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1483 * its children will be reachable trough him.
1485 peer_d = peer_info_get_short(d);
1488 for (p = peer_d->path_head; NULL != p; p = p->next)
1490 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1498 /* No callback, as peer will be already disconnected */
1499 tree_add_path(peer->tunnels[i]->tree, aux, NULL, NULL);
1503 peer_info_connect (peer_d, peer->tunnels[i]);
1510 * Add the path to the peer and update the path used to reach it in case this
1513 * @param peer_info Destination peer to add the path to.
1514 * @param path New path to add. Last peer must be the peer in arg 1.
1515 * Path will be either used of freed if already known.
1516 * @param trusted Do we trust that this path is real?
1519 path_add_to_peer (struct MeshPeerInfo *peer_info,
1520 struct MeshPeerPath *path,
1523 struct MeshPeerPath *aux;
1527 if ((NULL == peer_info) || (NULL == path))
1530 path_destroy (path);
1533 if (path->length <= 2 && GNUNET_NO == trusted)
1535 /* Only allow CORE to tell us about direct paths */
1536 path_destroy (path);
1539 for (l = 1; l < path->length; l++)
1541 if (path->peers[l] == myid)
1543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1544 "MESH: shortening path by %u\n",
1546 for (l2 = 0; l2 < path->length - l - 1 ; l2++)
1548 path->peers[l2] = path->peers[l + l2];
1552 path->peers = GNUNET_realloc (path->peers,
1553 path->length * sizeof (GNUNET_PEER_Id));
1558 struct GNUNET_PeerIdentity id;
1560 GNUNET_PEER_resolve (peer_info->id, &id);
1561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1562 "MESH: adding path [%u] to peer %s\n",
1567 l = path_get_length (path);
1574 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1576 l2 = path_get_length (aux);
1579 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1580 peer_info->path_tail,
1587 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1594 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1595 peer_info->path_tail,
1602 * Add the path to the origin peer and update the path used to reach it in case
1603 * this is the shortest.
1604 * The path is given in peer_info -> destination, therefore we turn the path
1605 * upside down first.
1607 * @param peer_info Peer to add the path to, being the origin of the path.
1608 * @param path New path to add after being inversed.
1609 * @param trusted Do we trust that this path is real?
1612 path_add_to_origin (struct MeshPeerInfo *peer_info,
1613 struct MeshPeerPath *path,
1617 path_add_to_peer (peer_info, path, trusted);
1622 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1623 * to obtain a local peer -> destination path and interning the peer ids.
1625 * @return Newly allocated and created path
1627 static struct MeshPeerPath *
1628 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1629 unsigned int get_path_length,
1630 const struct GNUNET_PeerIdentity *put_path,
1631 unsigned int put_path_length)
1633 struct MeshPeerPath *p;
1639 GNUNET_PEER_change_rc(myid, 1);
1640 i = get_path_length;
1641 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1642 for (i--; i >= 0; i--)
1644 id = GNUNET_PEER_intern (&get_path[i]);
1645 if (p->length > 0 && id == p->peers[p->length - 1])
1647 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1648 GNUNET_PEER_change_rc(id, -1);
1652 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1653 "MESH: Adding from GET: %s.\n",
1654 GNUNET_i2s(&get_path[i]));
1656 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1657 p->peers[p->length - 1] = id;
1660 i = put_path_length;
1661 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1662 for (i--; i >= 0; i--)
1664 id = GNUNET_PEER_intern (&put_path[i]);
1667 /* PUT path went through us, so discard the path up until now and start
1668 * from here to get a much shorter (and loop-free) path.
1673 if (p->length > 0 && id == p->peers[p->length - 1])
1675 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1676 GNUNET_PEER_change_rc(id, -1);
1680 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1681 "MESH: Adding from PUT: %s.\n",
1682 GNUNET_i2s(&put_path[i]));
1684 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1685 p->peers[p->length - 1] = id;
1689 if (get_path_length > 0)
1690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1691 "MESH: (first of GET: %s)\n",
1692 GNUNET_i2s(&get_path[0]));
1693 if (put_path_length > 0)
1694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1695 "MESH: (first of PUT: %s)\n",
1696 GNUNET_i2s(&put_path[0]));
1697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1698 "MESH: In total: %d hops\n",
1700 for (i = 0; i < p->length; i++)
1702 struct GNUNET_PeerIdentity peer_id;
1704 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1708 GNUNET_i2s(&peer_id));
1716 * Send keepalive packets for a peer
1718 * @param cls Closure (tunnel for which to send the keepalive).
1719 * @param tc Notification context.
1721 * TODO: implement explicit multicast keepalive?
1724 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1728 * Search for a tunnel among the incoming tunnels
1730 * @param tid the local id of the tunnel
1732 * @return tunnel handler, NULL if doesn't exist
1734 static struct MeshTunnel *
1735 tunnel_get_incoming (MESH_TunnelNumber tid)
1737 GNUNET_HashCode hash;
1739 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1740 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1741 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1746 * Search for a tunnel among the tunnels for a client
1748 * @param c the client whose tunnels to search in
1749 * @param tid the local id of the tunnel
1751 * @return tunnel handler, NULL if doesn't exist
1753 static struct MeshTunnel *
1754 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1756 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1758 return tunnel_get_incoming (tid);
1762 GNUNET_HashCode hash;
1764 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1765 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1771 * Search for a tunnel by global ID using PEER_ID
1773 * @param pi owner of the tunnel
1774 * @param tid global tunnel number
1776 * @return tunnel handler, NULL if doesn't exist
1778 static struct MeshTunnel *
1779 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1781 struct MESH_TunnelID id;
1782 GNUNET_HashCode hash;
1787 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1788 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1793 * Search for a tunnel by global ID using full PeerIdentities
1795 * @param oid owner of the tunnel
1796 * @param tid global tunnel number
1798 * @return tunnel handler, NULL if doesn't exist
1800 static struct MeshTunnel *
1801 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1803 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1808 * Callback used to notify a client owner of a tunnel that a peer has
1809 * disconnected, most likely because of a path change.
1811 * @param cls Closure (tunnel this notification is about).
1812 * @param peer_id Short ID of disconnected peer.
1815 notify_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
1817 struct MeshTunnel *t = cls;
1818 struct MeshPeerInfo *peer;
1819 struct MeshPathInfo *path_info;
1821 if (NULL != t->client && NULL != nc)
1823 struct GNUNET_MESH_PeerControl msg;
1824 msg.header.size = htons (sizeof (msg));
1825 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1826 msg.tunnel_id = htonl (t->local_tid);
1827 GNUNET_PEER_resolve (peer_id, &msg.peer);
1828 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1829 &msg.header, GNUNET_NO);
1831 peer = peer_info_get_short(peer_id);
1832 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1833 path_info->peer = peer;
1835 GNUNET_SCHEDULER_add_now(&peer_info_connect_task, path_info);
1840 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1841 * needed rescources.
1842 * If peer already exists, reevaluate shortest path and change if different.
1844 * @param t Tunnel we want to add a new peer to
1845 * @param peer PeerInfo of the peer being added
1849 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1851 struct GNUNET_PeerIdentity id;
1852 struct MeshPeerPath *best_p;
1853 struct MeshPeerPath *p;
1854 unsigned int best_cost;
1857 GNUNET_PEER_resolve(peer->id, &id);
1859 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1862 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1863 GNUNET_assert (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put(
1867 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1870 if (NULL != (p = peer->path_head))
1873 best_cost = path_get_cost(t->tree, p);
1876 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1883 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected, t);
1884 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1885 t->path_refresh_task =
1886 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
1890 /* Start a DHT get if necessary */
1891 peer_info_connect(peer, t);
1896 * Add a path to a tunnel which we don't own, just to remember the next hop.
1897 * If destination node was already in the tunnel, the first hop information
1898 * will be replaced with the new path.
1900 * @param t Tunnel we want to add a new peer to
1901 * @param p Path to add
1902 * @param own_pos Position of local node in path.
1906 tunnel_add_path (struct MeshTunnel *t,
1907 struct MeshPeerPath *p,
1908 unsigned int own_pos)
1910 struct GNUNET_PeerIdentity id;
1912 GNUNET_assert (0 != own_pos);
1913 tree_add_path(t->tree, p, NULL, NULL);
1914 if (tree_get_me (t->tree) == 0)
1915 tree_set_me (t->tree, p->peers[own_pos]);
1916 if (own_pos < p->length - 1)
1918 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1919 tree_update_first_hops(t->tree,
1920 tree_get_me (t->tree),
1927 * Notifies a tunnel that a connection has broken that affects at least
1928 * some of its peers. Sends a notification towards the root of the tree.
1929 * In case the peer is the owner of the tree, notifies the client that owns
1930 * the tunnel and tries to reconnect.
1932 * @param t Tunnel affected.
1933 * @param p1 Peer that got disconnected from p2.
1934 * @param p2 Peer that got disconnected from p1.
1936 * @return Short ID of the peer disconnected (either p1 or p2).
1937 * 0 if the tunnel remained unaffected.
1939 static GNUNET_PEER_Id
1940 tunnel_notify_connection_broken (struct MeshTunnel *t,
1946 pid = tree_notify_connection_broken (t->tree,
1949 ¬ify_peer_disconnected,
1951 if (myid != p1 && myid != p2)
1957 if (tree_get_predecessor(t->tree) != 0)
1959 /* We are the peer still connected, notify owner of the disconnection. */
1960 struct GNUNET_MESH_PathBroken msg;
1961 struct GNUNET_PeerIdentity neighbor;
1963 msg.header.size = htons (sizeof (msg));
1964 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1965 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1966 msg.tid = htonl (t->id.tid);
1967 msg.peer1 = my_full_id;
1968 GNUNET_PEER_resolve (pid, &msg.peer2);
1969 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
1970 send_message (&msg.header, &neighbor);
1977 struct MeshMulticastData
1979 struct MeshTunnel *t;
1981 GNUNET_SCHEDULER_TaskIdentifier *task;
1983 unsigned int *reference_counter;
1992 * Send a multicast packet to a neighbor.
1995 tunnel_send_multicast_iterator (void *cls,
1996 GNUNET_PEER_Id neighbor_id)
1998 struct MeshMulticastData *mdata = cls;
1999 struct MeshDataDescriptor *info;
2000 struct GNUNET_PeerIdentity neighbor;
2003 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2005 info->data = mdata->data;
2006 info->size = mdata->data_len;
2007 info->copies = mdata->reference_counter;
2008 (*(mdata->reference_counter))++;
2010 if (NULL != mdata->t->client)
2012 info->client = mdata->t->client->handle;
2013 info->timeout_task = mdata->task;
2015 info->destination = neighbor_id;
2016 GNUNET_PEER_resolve (neighbor_id, &neighbor);
2018 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2019 "MESH: sending to %s...\n",
2020 GNUNET_i2s (&neighbor));
2022 info->peer = peer_info_get(&neighbor);
2023 GNUNET_assert (NULL != info->peer);
2024 i = peer_info_transmit_slot(info->peer);
2025 info->handler_n = i;
2026 info->peer->infos[i] = info;
2027 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2028 info->peer->core_transmit[i] =
2029 GNUNET_CORE_notify_transmit_ready (core_handle,
2032 GNUNET_TIME_UNIT_FOREVER_REL,
2035 &send_core_data_multicast, info);
2039 * Send a message in a tunnel in multicast, sending a copy to each child node
2040 * down the local one in the tunnel tree.
2042 * @param t Tunnel in which to send the data.
2043 * @param msg Message to be sent
2046 tunnel_send_multicast (struct MeshTunnel *t,
2047 const struct GNUNET_MessageHeader *msg)
2049 struct MeshMulticastData *mdata;
2052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2053 "MESH: sending a multicast packet...\n");
2055 GNUNET_assert (tree_get_me (t->tree) != 0);
2056 mdata = GNUNET_malloc (sizeof (struct MeshMulticastData));
2057 mdata->data_len = ntohs (msg->size);
2058 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2059 mdata->data = GNUNET_malloc (mdata->data_len);
2061 memcpy (mdata->data, msg, mdata->data_len);
2062 if (NULL != t->client)
2064 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
2065 *(mdata->task) = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
2070 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
2071 if (*(mdata->reference_counter) == 0)
2073 GNUNET_free (mdata->data);
2074 GNUNET_free (mdata->reference_counter);
2075 if (NULL != mdata->task)
2077 GNUNET_free (mdata->task);
2080 GNUNET_free (mdata);
2082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2083 "MESH: sending a multicast packet done\n");
2090 * Send a message to all peers in this tunnel that the tunnel is no longer
2093 * @param t The tunnel whose peers to notify.
2096 tunnel_send_destroy (struct MeshTunnel *t)
2098 struct GNUNET_MESH_TunnelDestroy msg;
2100 msg.header.size = htons (sizeof (msg));
2101 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2102 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2103 msg.tid = htonl (t->id.tid);
2104 tunnel_send_multicast (t, &msg.header);
2110 * Destroy the tunnel and free any allocated resources linked to it
2112 * @param t the tunnel to destroy
2114 * @return GNUNET_OK on success
2117 tunnel_destroy (struct MeshTunnel *t)
2119 struct MeshClient *c;
2120 struct MeshQueue *q;
2121 struct MeshQueue *qn;
2122 GNUNET_HashCode hash;
2131 struct GNUNET_PeerIdentity id;
2133 GNUNET_PEER_resolve(t->id.oid, &id);
2134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2135 "MESH: destroying tunnel %s [%x]\n",
2139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2143 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2144 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2149 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2151 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2155 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2157 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2158 GNUNET_break (GNUNET_YES ==
2159 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2161 if (NULL != t->peers)
2163 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2164 &peer_info_delete_tunnel, t);
2165 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2170 if (NULL != q->data)
2171 GNUNET_free (q->data);
2175 /* TODO cancel core transmit ready in case it was active */
2177 tree_destroy(t->tree);
2178 if (NULL != t->dht_get_type)
2179 GNUNET_DHT_get_stop(t->dht_get_type);
2180 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2181 GNUNET_SCHEDULER_cancel(t->timeout_task);
2182 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2183 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2190 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2191 * that are no longer needed, as well as nodes of no longer reachable peers.
2192 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2194 * @param t Tunnel from which to remove the path.
2195 * @param p Peer which should be removed.
2198 tunnel_delete_peer (struct MeshTunnel *t,
2199 GNUNET_PEER_Id peer)
2201 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
2207 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2208 * client when the client disconnects.
2210 * @param cls closure (client that is disconnecting)
2211 * @param key the hash of the local tunnel id (used to access the hashmap)
2212 * @param value the value stored at the key (tunnel to destroy)
2214 * @return GNUNET_OK on success
2217 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2219 struct MeshTunnel *t = value;
2222 r = tunnel_destroy (t);
2228 * Timeout function, destroys tunnel if called
2230 * @param cls Closure (tunnel to destroy).
2231 * @param tc TaskContext
2234 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2236 struct MeshTunnel *t = cls;
2238 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2240 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2245 * Resets the tunnel timeout. Starts it if no timeout was running.
2247 * @param t Tunnel whose timeout to reset.
2250 tunnel_reset_timeout (struct MeshTunnel *t)
2252 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2253 GNUNET_SCHEDULER_cancel (t->timeout_task);
2254 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2255 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2261 /******************************************************************************/
2262 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2263 /******************************************************************************/
2266 * Function called to notify a client about the socket
2267 * being ready to queue more data. "buf" will be
2268 * NULL and "size" zero if the socket was closed for
2269 * writing in the meantime.
2271 * @param cls closure
2272 * @param size number of bytes available in buf
2273 * @param buf where the callee should write the message
2274 * @return number of bytes written to buf
2277 send_core_create_path (void *cls, size_t size, void *buf)
2279 struct MeshPathInfo *info = cls;
2280 struct GNUNET_MESH_ManipulatePath *msg;
2281 struct GNUNET_PeerIdentity *peer_ptr;
2282 struct MeshPeerInfo *peer = info->peer;
2283 struct MeshTunnel *t = info->t;
2284 struct MeshPeerPath *p = info->path;
2288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2289 "MESH: CREATE PATH sending...\n");
2291 sizeof (struct GNUNET_MESH_ManipulatePath) +
2292 p->length * sizeof (struct GNUNET_PeerIdentity);
2294 if (size < size_needed || NULL == buf)
2296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2300 info->peer->core_transmit[info->pos] =
2301 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2302 GNUNET_TIME_UNIT_FOREVER_REL,
2303 path_get_first_hop (t->tree, peer->id),
2305 &send_core_create_path,
2309 info->peer->core_transmit[info->pos] = NULL;
2312 struct GNUNET_PeerIdentity id;
2314 GNUNET_PEER_resolve (peer->id, &id);
2315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2316 "MESH: setting core_transmit %s [%u] to NULL\n",
2321 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2322 msg->header.size = htons (size_needed);
2323 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2324 msg->tid = ntohl (t->id.tid);
2326 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2327 for (i = 0; i < p->length; i++)
2329 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2336 "MESH: CREATE PATH (%u bytes long) sent!\n",
2343 * Function called to notify a client about the socket
2344 * being ready to queue more data. "buf" will be
2345 * NULL and "size" zero if the socket was closed for
2346 * writing in the meantime.
2348 * @param cls closure (data itself)
2349 * @param size number of bytes available in buf
2350 * @param buf where the callee should write the message
2352 * @return number of bytes written to buf
2355 send_core_data_multicast (void *cls, size_t size, void *buf)
2357 struct MeshDataDescriptor *info = cls;
2360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2361 GNUNET_assert (NULL != info);
2362 GNUNET_assert (NULL != info->peer);
2363 total_size = info->size;
2364 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2366 if (total_size > size)
2369 struct GNUNET_PeerIdentity id;
2371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2372 "MESH: Multicast: retransmitting... (%u/%u)\n",
2374 GNUNET_PEER_resolve(info->peer->id, &id);
2375 info->peer->core_transmit[info->handler_n] =
2376 GNUNET_CORE_notify_transmit_ready (core_handle,
2379 GNUNET_TIME_UNIT_FOREVER_REL,
2382 &send_core_data_multicast,
2386 info->peer->core_transmit[info->handler_n] = NULL;
2387 info->peer->infos[info->handler_n] = NULL;
2388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2389 memcpy (buf, info->data, total_size);
2392 struct GNUNET_MESH_Multicast *mc;
2393 struct GNUNET_MessageHeader *mh;
2396 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2398 mc = (struct GNUNET_MESH_Multicast *) mh;
2399 mh = (struct GNUNET_MessageHeader *) &mc[1];
2400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2401 "MESH: multicast, payload type %u\n",
2403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2404 "MESH: multicast, payload size %u\n",
2409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2415 data_descriptor_decrement_multicast (info);
2416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2424 * Function called to notify a client about the socket
2425 * being ready to queue more data. "buf" will be
2426 * NULL and "size" zero if the socket was closed for
2427 * writing in the meantime.
2429 * @param cls closure (MeshDataDescriptor)
2430 * @param size number of bytes available in buf
2431 * @param buf where the callee should write the message
2432 * @return number of bytes written to buf
2435 send_core_path_ack (void *cls, size_t size, void *buf)
2437 struct MeshDataDescriptor *info = cls;
2438 struct GNUNET_MESH_PathACK *msg = buf;
2440 GNUNET_assert (NULL != info);
2443 info->peer->core_transmit[info->handler_n] = NULL;
2445 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2450 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2451 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2452 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2453 msg->tid = htonl (info->origin->tid);
2454 msg->peer_id = my_full_id;
2456 /* TODO add signature */
2458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2459 return sizeof (struct GNUNET_MESH_PathACK);
2463 /******************************************************************************/
2464 /******************** MESH NETWORK HANDLERS **************************/
2465 /******************************************************************************/
2469 * Core handler for path creation
2471 * @param cls closure
2472 * @param message message
2473 * @param peer peer identity this notification is about
2474 * @param atsi performance data
2475 * @param atsi_count number of records in 'atsi'
2477 * @return GNUNET_OK to keep the connection open,
2478 * GNUNET_SYSERR to close it (signal serious error)
2481 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2482 const struct GNUNET_MessageHeader *message,
2483 const struct GNUNET_ATS_Information *atsi,
2484 unsigned int atsi_count)
2486 unsigned int own_pos;
2489 MESH_TunnelNumber tid;
2490 struct GNUNET_MESH_ManipulatePath *msg;
2491 struct GNUNET_PeerIdentity *pi;
2492 GNUNET_HashCode hash;
2493 struct MeshPeerPath *path;
2494 struct MeshPeerInfo *dest_peer_info;
2495 struct MeshPeerInfo *orig_peer_info;
2496 struct MeshTunnel *t;
2498 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2499 "MESH: Received a path create msg [%s]\n",
2500 GNUNET_i2s(&my_full_id));
2501 size = ntohs (message->size);
2502 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2504 GNUNET_break_op (0);
2508 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2509 if (size % sizeof (struct GNUNET_PeerIdentity))
2511 GNUNET_break_op (0);
2514 size /= sizeof (struct GNUNET_PeerIdentity);
2517 GNUNET_break_op (0);
2520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2521 "MESH: path has %u hops.\n",
2523 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2525 tid = ntohl (msg->tid);
2526 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2527 t = tunnel_get (pi, tid);
2528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2529 "MESH: path is for tunnel %s [%X].\n",
2534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2535 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2536 t->id.oid = GNUNET_PEER_intern (pi);
2538 while (NULL != tunnel_get_incoming (next_local_tid))
2539 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2540 t->local_tid = next_local_tid++;
2541 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2542 t->tree = tree_new(t->id.oid);
2544 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2546 GNUNET_CONTAINER_multihashmap_put (
2550 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2556 tunnel_reset_timeout (t);
2557 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2559 GNUNET_CONTAINER_multihashmap_put (
2563 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2571 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2572 if (NULL == dest_peer_info)
2574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2575 "MESH: Creating PeerInfo for destination.\n");
2576 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2577 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2578 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2580 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2582 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2583 if (NULL == orig_peer_info)
2585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2586 "MESH: Creating PeerInfo for origin.\n");
2587 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2588 orig_peer_info->id = GNUNET_PEER_intern (pi);
2589 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2590 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2593 path = path_new (size);
2595 for (i = 0; i < size; i++)
2597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2598 "MESH: ... adding %s\n",
2599 GNUNET_i2s(&pi[i]));
2600 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2601 if (path->peers[i] == myid)
2604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2605 "MESH: Own position: %u\n", own_pos);
2608 /* cannot be self, must be 'not found' */
2609 /* create path: self not found in path through self */
2610 GNUNET_break_op (0);
2611 path_destroy (path);
2612 /* FIXME error. destroy tunnel? leave for timeout? */
2615 tunnel_add_path (t, path, own_pos);
2616 if (own_pos == size - 1)
2618 /* It is for us! Send ack. */
2619 struct GNUNET_MESH_TunnelNotification cmsg;
2620 struct MeshDataDescriptor *info;
2623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2624 "MESH: It's for us!\n");
2625 path_add_to_origin (orig_peer_info, path, GNUNET_NO);
2626 if (NULL == t->peers)
2627 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2628 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2630 &my_full_id.hashPubKey,
2631 peer_info_get(&my_full_id),
2632 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2633 /* FIXME use send_message */
2634 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2635 info->origin = &t->id;
2636 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2637 GNUNET_assert (NULL != info->peer);
2638 j = peer_info_transmit_slot(info->peer);
2639 info->handler_n = j;
2640 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2641 info->peer->infos[j] = info;
2642 info->peer->core_transmit[j] =
2643 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2644 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2645 sizeof (struct GNUNET_MESH_PathACK),
2646 &send_core_path_ack, info);
2647 cmsg.header.size = htons(sizeof(cmsg));
2648 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2649 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2650 cmsg.tunnel_id = htonl(t->local_tid);
2651 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2655 struct MeshPeerPath *path2;
2657 /* It's for somebody else! Retransmit. */
2658 path2 = path_duplicate(path);
2659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2660 "MESH: Retransmitting.\n");
2661 path_add_to_peer(dest_peer_info, path2, GNUNET_NO);
2662 path2 = path_duplicate(path);
2663 path_add_to_origin(orig_peer_info, path2, GNUNET_NO);
2664 send_create_path(dest_peer_info, path, t);
2671 * Core handler for path destruction
2673 * @param cls closure
2674 * @param message message
2675 * @param peer peer identity this notification is about
2676 * @param atsi performance data
2677 * @param atsi_count number of records in 'atsi'
2679 * @return GNUNET_OK to keep the connection open,
2680 * GNUNET_SYSERR to close it (signal serious error)
2683 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2684 const struct GNUNET_MessageHeader *message,
2685 const struct GNUNET_ATS_Information *atsi,
2686 unsigned int atsi_count)
2688 struct GNUNET_MESH_ManipulatePath *msg;
2689 struct GNUNET_PeerIdentity *pi;
2690 struct MeshPeerPath *path;
2691 struct MeshTunnel *t;
2692 unsigned int own_pos;
2696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2697 "MESH: Received a PATH DESTROY msg from %s\n",
2699 size = ntohs (message->size);
2700 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2702 GNUNET_break_op (0);
2706 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2707 if (size % sizeof (struct GNUNET_PeerIdentity))
2709 GNUNET_break_op (0);
2712 size /= sizeof (struct GNUNET_PeerIdentity);
2715 GNUNET_break_op (0);
2718 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2719 "MESH: path has %u hops.\n",
2722 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2723 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2725 "MESH: path is for tunnel %s [%X].\n",
2728 t = tunnel_get (pi, ntohl (msg->tid));
2731 /* TODO notify back: we don't know this tunnel */
2732 GNUNET_break_op (0);
2735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2736 path = path_new (size);
2738 for (i = 0; i < size; i++)
2740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2741 "MESH: ... adding %s\n",
2742 GNUNET_i2s(&pi[i]));
2743 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2744 if (path->peers[i] == myid)
2747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2748 "MESH: Own position: %u\n", own_pos);
2749 if (own_pos < path->length - 1)
2750 send_message (message, &pi[own_pos + 1]);
2751 tunnel_delete_peer (t, path->peers[path->length - 1]);
2752 path_destroy (path);
2758 * Core handler for notifications of broken paths
2760 * @param cls closure
2761 * @param message message
2762 * @param peer peer identity this notification is about
2763 * @param atsi performance data
2764 * @param atsi_count number of records in 'atsi'
2766 * @return GNUNET_OK to keep the connection open,
2767 * GNUNET_SYSERR to close it (signal serious error)
2770 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2771 const struct GNUNET_MessageHeader *message,
2772 const struct GNUNET_ATS_Information *atsi,
2773 unsigned int atsi_count)
2775 struct GNUNET_MESH_PathBroken *msg;
2776 struct MeshTunnel *t;
2778 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2779 "MESH: Received a PATH BROKEN msg from %s\n",
2781 msg = (struct GNUNET_MESH_PathBroken *) message;
2782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2783 "MESH: regarding %s\n",
2784 GNUNET_i2s(&msg->peer1));
2785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2786 "MESH: regarding %s\n",
2787 GNUNET_i2s(&msg->peer2));
2788 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2791 GNUNET_break_op (0);
2794 tunnel_notify_connection_broken(t,
2795 GNUNET_PEER_search(&msg->peer1),
2796 GNUNET_PEER_search(&msg->peer2));
2803 * Core handler for tunnel destruction
2805 * @param cls closure
2806 * @param message message
2807 * @param peer peer identity this notification is about
2808 * @param atsi performance data
2809 * @param atsi_count number of records in 'atsi'
2811 * @return GNUNET_OK to keep the connection open,
2812 * GNUNET_SYSERR to close it (signal serious error)
2815 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2816 const struct GNUNET_MessageHeader *message,
2817 const struct GNUNET_ATS_Information *atsi,
2818 unsigned int atsi_count)
2820 struct GNUNET_MESH_TunnelDestroy *msg;
2821 struct MeshTunnel *t;
2823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2824 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2826 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2828 "MESH: for tunnel %s [%u]\n",
2829 GNUNET_i2s (&msg->oid),
2831 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2834 /* Probably already got the message from another path,
2835 * destroyed the tunnel and retransmitted to children.
2840 if (t->id.oid == myid)
2842 GNUNET_break_op (0);
2845 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2847 /* Tunnel was incoming, notify clients */
2848 send_clients_tunnel_destroy (t);
2850 tunnel_send_destroy (t);
2857 * Core handler for mesh network traffic going from the origin to a peer
2859 * @param cls closure
2860 * @param peer peer identity this notification is about
2861 * @param message message
2862 * @param atsi performance data
2863 * @param atsi_count number of records in 'atsi'
2864 * @return GNUNET_OK to keep the connection open,
2865 * GNUNET_SYSERR to close it (signal serious error)
2868 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2869 const struct GNUNET_MessageHeader *message,
2870 const struct GNUNET_ATS_Information *atsi,
2871 unsigned int atsi_count)
2873 struct GNUNET_MESH_Unicast *msg;
2874 struct MeshTunnel *t;
2878 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2879 "MESH: got a unicast packet from %s\n",
2881 size = ntohs (message->size);
2883 sizeof (struct GNUNET_MESH_Unicast) +
2884 sizeof (struct GNUNET_MessageHeader))
2889 msg = (struct GNUNET_MESH_Unicast *) message;
2890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2891 "MESH: of type %u\n",
2892 ntohs (msg[1].header.type));
2893 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2896 /* TODO notify back: we don't know this tunnel */
2897 GNUNET_break_op (0);
2900 tunnel_reset_timeout (t);
2901 pid = GNUNET_PEER_search(&msg->destination);
2904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2905 "MESH: it's for us! sending to clients...\n");
2906 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2910 "MESH: not for us, retransmitting...\n");
2911 send_message (message, path_get_first_hop(t->tree, pid));
2917 * Core handler for mesh network traffic going from the origin to all peers
2919 * @param cls closure
2920 * @param message message
2921 * @param peer peer identity this notification is about
2922 * @param atsi performance data
2923 * @param atsi_count number of records in 'atsi'
2924 * @return GNUNET_OK to keep the connection open,
2925 * GNUNET_SYSERR to close it (signal serious error)
2927 * TODO: Check who we got this from, to validate route.
2930 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2931 const struct GNUNET_MessageHeader *message,
2932 const struct GNUNET_ATS_Information *atsi,
2933 unsigned int atsi_count)
2935 struct GNUNET_MESH_Multicast *msg;
2936 struct MeshTunnel *t;
2939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2940 "MESH: got a multicast packet from %s\n",
2942 size = ntohs (message->size);
2943 if (sizeof (struct GNUNET_MESH_Multicast) +
2944 sizeof (struct GNUNET_MessageHeader) > size)
2946 GNUNET_break_op (0);
2949 msg = (struct GNUNET_MESH_Multicast *) message;
2950 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2954 /* TODO notify that we dont know that tunnel */
2955 GNUNET_break_op (0);
2958 tunnel_reset_timeout (t);
2960 /* Transmit to locally interested clients */
2961 if (NULL != t->peers &&
2962 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2964 send_subscribed_clients (message, &msg[1].header);
2966 tunnel_send_multicast(t, message);
2972 * Core handler for mesh network traffic toward the owner of a tunnel
2974 * @param cls closure
2975 * @param message message
2976 * @param peer peer identity this notification is about
2977 * @param atsi performance data
2978 * @param atsi_count number of records in 'atsi'
2980 * @return GNUNET_OK to keep the connection open,
2981 * GNUNET_SYSERR to close it (signal serious error)
2984 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2985 const struct GNUNET_MessageHeader *message,
2986 const struct GNUNET_ATS_Information *atsi,
2987 unsigned int atsi_count)
2989 struct GNUNET_MESH_ToOrigin *msg;
2990 struct GNUNET_PeerIdentity id;
2991 struct MeshPeerInfo *peer_info;
2992 struct MeshTunnel *t;
2995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2996 "MESH: got a ToOrigin packet from %s\n",
2998 size = ntohs (message->size);
2999 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3000 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3002 GNUNET_break_op (0);
3005 msg = (struct GNUNET_MESH_ToOrigin *) message;
3006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3007 "MESH: of type %u\n",
3008 ntohs (msg[1].header.type));
3009 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3013 /* TODO notify that we dont know this tunnel (whom)? */
3014 GNUNET_break_op (0);
3018 if (t->id.oid == myid)
3021 struct GNUNET_MESH_ToOrigin *copy;
3023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3024 "MESH: it's for us! sending to clients...\n");
3025 if (NULL == t->client)
3027 /* got data packet for ownerless tunnel */
3028 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3029 "MESH: no clients!\n");
3030 GNUNET_break_op (0);
3033 /* TODO signature verification */
3034 memcpy (cbuf, message, size);
3035 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3036 copy->tid = htonl (t->local_tid);
3037 GNUNET_SERVER_notification_context_unicast (nc,
3043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3044 "MESH: not for us, retransmitting...\n");
3046 peer_info = peer_info_get (&msg->oid);
3047 if (NULL == peer_info)
3049 /* unknown origin of tunnel */
3053 GNUNET_PEER_resolve (tree_get_predecessor(t->tree), &id);
3054 send_message (message, &id);
3061 * Core handler for path ACKs
3063 * @param cls closure
3064 * @param message message
3065 * @param peer peer identity this notification is about
3066 * @param atsi performance data
3067 * @param atsi_count number of records in 'atsi'
3069 * @return GNUNET_OK to keep the connection open,
3070 * GNUNET_SYSERR to close it (signal serious error)
3073 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3074 const struct GNUNET_MessageHeader *message,
3075 const struct GNUNET_ATS_Information *atsi,
3076 unsigned int atsi_count)
3078 struct GNUNET_MESH_PathACK *msg;
3079 struct GNUNET_PeerIdentity id;
3080 struct MeshPeerInfo *peer_info;
3081 struct MeshTunnel *t;
3083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3084 "MESH: Received a path ACK msg [%s]\n",
3085 GNUNET_i2s(&my_full_id));
3086 msg = (struct GNUNET_MESH_PathACK *) message;
3087 t = tunnel_get (&msg->oid, msg->tid);
3090 /* TODO notify that we don't know the tunnel */
3094 /* Message for us? */
3095 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
3098 if (NULL == t->client)
3100 GNUNET_break_op (0);
3103 if (NULL != t->dht_get_type)
3105 GNUNET_DHT_get_stop (t->dht_get_type);
3106 t->dht_get_type = NULL;
3108 peer_info = peer_info_get (&msg->peer_id);
3109 tree_set_status(t->tree, peer_info->id, MESH_PEER_READY);
3110 send_client_peer_connected(t, peer_info->id);
3114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3115 "MESH: not for us, retransmitting...\n");
3116 GNUNET_PEER_resolve(tree_get_predecessor(t->tree), &id);
3117 peer_info = peer_info_get (&msg->oid);
3118 if (NULL == peer_info)
3120 /* If we know the tunnel, we should DEFINITELY know the peer */
3124 send_message (message, &id);
3130 * Functions to handle messages from core
3132 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3133 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3134 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3135 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3136 sizeof (struct GNUNET_MESH_PathBroken)},
3137 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3138 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3139 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3140 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3141 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3142 sizeof (struct GNUNET_MESH_PathACK)},
3148 /******************************************************************************/
3149 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3150 /******************************************************************************/
3153 * deregister_app: iterator for removing each application registered by a client
3155 * @param cls closure
3156 * @param key the hash of the application id (used to access the hashmap)
3157 * @param value the value stored at the key (client)
3159 * @return GNUNET_OK on success
3162 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3164 GNUNET_break (GNUNET_YES ==
3165 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3171 * notify_client_connection_failure: notify a client that the connection to the
3172 * requested remote peer is not possible (for instance, no route found)
3173 * Function called when the socket is ready to queue more data. "buf" will be
3174 * NULL and "size" zero if the socket was closed for writing in the meantime.
3176 * @param cls closure
3177 * @param size number of bytes available in buf
3178 * @param buf where the callee should write the message
3179 * @return number of bytes written to buf
3182 notify_client_connection_failure (void *cls, size_t size, void *buf)
3185 struct MeshPeerInfo *peer_info;
3186 struct GNUNET_MESH_PeerControl *msg;
3187 struct GNUNET_PeerIdentity id;
3189 if (0 == size && NULL == buf)
3191 // TODO retry? cancel?
3195 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3196 peer_info = (struct MeshPeerInfo *) cls;
3197 msg = (struct GNUNET_MESH_PeerControl *) buf;
3198 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3199 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3200 // msg->tunnel_id = htonl(peer_info->t->tid);
3201 GNUNET_PEER_resolve (peer_info->id, &id);
3202 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3210 * Send keepalive packets for a peer
3212 * @param cls Closure (tunnel for which to send the keepalive).
3213 * @param tc Notification context.
3215 * TODO: implement explicit multicast keepalive?
3218 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3220 struct MeshTunnel *t = cls;
3221 struct GNUNET_MessageHeader *payload;
3222 struct GNUNET_MESH_Multicast *msg;
3223 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3224 sizeof(struct GNUNET_MessageHeader);
3227 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3231 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3234 "MESH: sending keepalive for tunnel %d\n",
3237 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3238 msg->header.size = htons (size);
3239 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3240 msg->oid = my_full_id;
3241 msg->tid = htonl(t->id.tid);
3242 payload = (struct GNUNET_MessageHeader *) &msg[1];
3243 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3244 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3245 tunnel_send_multicast (t, &msg->header);
3247 t->path_refresh_task =
3248 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
3254 * Function to process paths received for a new peer addition. The recorded
3255 * paths form the initial tunnel, which can be optimized later.
3256 * Called on each result obtained for the DHT search.
3258 * @param cls closure
3259 * @param exp when will this value expire
3260 * @param key key of the result
3261 * @param type type of the result
3262 * @param size number of bytes in data
3263 * @param data pointer to the result data
3265 * TODO: re-issue the request after certain time? cancel after X results?
3268 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3269 const GNUNET_HashCode * key,
3270 const struct GNUNET_PeerIdentity *get_path,
3271 unsigned int get_path_length,
3272 const struct GNUNET_PeerIdentity *put_path,
3273 unsigned int put_path_length,
3274 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3276 struct MeshPathInfo *path_info = cls;
3277 struct MeshPeerPath *p;
3278 struct GNUNET_PeerIdentity pi;
3281 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3282 "MESH: Got results from DHT!\n");
3283 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3284 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3287 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3288 // path_info->peer->dhtget = NULL;
3290 p = path_build_from_dht (get_path, get_path_length,
3291 put_path, put_path_length);
3292 path_add_to_peer (path_info->peer, p, GNUNET_NO);
3293 for (i = 0; i < path_info->peer->ntunnels; i++)
3295 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3296 peer_info_connect(path_info->peer, path_info->t);
3298 // GNUNET_free (path_info);
3305 * Function to process paths received for a new peer addition. The recorded
3306 * paths form the initial tunnel, which can be optimized later.
3307 * Called on each result obtained for the DHT search.
3309 * @param cls closure
3310 * @param exp when will this value expire
3311 * @param key key of the result
3312 * @param type type of the result
3313 * @param size number of bytes in data
3314 * @param data pointer to the result data
3317 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3318 const GNUNET_HashCode * key,
3319 const struct GNUNET_PeerIdentity *get_path,
3320 unsigned int get_path_length,
3321 const struct GNUNET_PeerIdentity *put_path,
3322 unsigned int put_path_length,
3323 enum GNUNET_BLOCK_Type type, size_t size,
3326 const struct GNUNET_PeerIdentity *pi = data;
3327 struct MeshTunnel *t = cls;
3328 struct MeshPeerInfo *peer_info;
3329 struct MeshPeerPath *p;
3331 if (size != sizeof (struct GNUNET_PeerIdentity))
3333 GNUNET_break_op (0);
3336 GNUNET_assert (NULL != t->client);
3337 peer_info = peer_info_get (pi);
3338 (void) GNUNET_CONTAINER_multihashmap_put (
3342 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3344 p = path_build_from_dht (get_path, get_path_length,
3345 put_path, put_path_length);
3346 path_add_to_peer (peer_info, p, GNUNET_NO);
3347 tunnel_add_peer(t, peer_info);
3348 peer_info_connect (peer_info, t);
3352 /******************************************************************************/
3353 /********************* MESH LOCAL HANDLES **************************/
3354 /******************************************************************************/
3358 * Handler for client disconnection
3360 * @param cls closure
3361 * @param client identification of the client; NULL
3362 * for the last call when the server is destroyed
3365 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3367 struct MeshClient *c;
3368 struct MeshClient *next;
3370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3379 if (c->handle != client && NULL != client)
3381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3386 GNUNET_SERVER_client_drop (c->handle);
3387 if (NULL != c->tunnels)
3389 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3390 &tunnel_destroy_iterator,
3392 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3395 /* deregister clients applications */
3396 if (NULL != c->apps)
3398 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3399 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3401 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3402 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3404 GNUNET_SCHEDULER_cancel (announce_applications_task);
3405 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3407 if (NULL != c->types)
3408 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3410 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3422 * Handler for new clients
3424 * @param cls closure
3425 * @param client identification of the client
3426 * @param message the actual message, which includes messages the client wants
3429 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3430 const struct GNUNET_MessageHeader *message)
3432 struct GNUNET_MESH_ClientConnect *cc_msg;
3433 struct MeshClient *c;
3434 GNUNET_MESH_ApplicationType *a;
3441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3442 /* Check data sanity */
3443 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3444 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3445 ntypes = ntohs (cc_msg->types);
3446 napps = ntohs (cc_msg->applications);
3448 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3451 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3455 /* Create new client structure */
3456 c = GNUNET_malloc (sizeof (struct MeshClient));
3458 c->id = next_client_id++;
3460 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3462 GNUNET_SERVER_client_keep (client);
3463 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3466 GNUNET_MESH_ApplicationType at;
3469 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3470 for (i = 0; i < napps; i++)
3473 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3474 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3475 /* store in clients hashmap */
3476 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3477 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3478 /* store in global hashmap, for announcements */
3479 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3480 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3482 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3483 announce_applications_task =
3484 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3492 t = (uint16_t *) & a[napps];
3493 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3494 for (i = 0; i < ntypes; i++)
3497 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3499 /* store in clients hashmap */
3500 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3501 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3502 /* store in global hashmap */
3503 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3504 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3508 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3510 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3511 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3512 GNUNET_SERVER_notification_context_add (nc, client);
3514 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3516 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3522 * Handler for requests of new tunnels
3524 * @param cls closure
3525 * @param client identification of the client
3526 * @param message the actual message
3529 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3530 const struct GNUNET_MessageHeader *message)
3532 struct GNUNET_MESH_TunnelMessage *t_msg;
3533 struct MeshTunnel *t;
3534 struct MeshClient *c;
3535 GNUNET_HashCode hash;
3537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3539 /* Sanity check for client registration */
3540 if (NULL == (c = client_get (client)))
3543 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3547 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3550 /* Message sanity check */
3551 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3554 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3558 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3559 /* Sanity check for tunnel numbering */
3560 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3563 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3566 /* Sanity check for duplicate tunnel IDs */
3567 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3570 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3574 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3575 while (NULL != tunnel_get_by_pi (myid, next_tid))
3576 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3577 t->id.tid = next_tid++;
3578 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3580 t->local_tid = ntohl (t_msg->tunnel_id);
3582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3583 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3584 GNUNET_i2s (&my_full_id),
3589 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3591 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3593 GNUNET_CONTAINER_multihashmap_put (
3594 c->tunnels, &hash, t,
3595 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3598 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3602 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3604 GNUNET_CONTAINER_multihashmap_put (
3606 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3609 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3612 t->tree = tree_new (myid);
3613 tree_set_me(t->tree, myid);
3615 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3621 * Handler for requests of deleting tunnels
3623 * @param cls closure
3624 * @param client identification of the client
3625 * @param message the actual message
3628 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3629 const struct GNUNET_MessageHeader *message)
3631 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3632 struct MeshClient *c;
3633 struct MeshTunnel *t;
3634 MESH_TunnelNumber tid;
3635 GNUNET_HashCode hash;
3637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3638 "MESH: Got a DESTROY TUNNEL from client!\n");
3640 /* Sanity check for client registration */
3641 if (NULL == (c = client_get (client)))
3644 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3647 /* Message sanity check */
3648 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3651 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3657 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3659 /* Retrieve tunnel */
3660 tid = ntohl (tunnel_msg->tunnel_id);
3662 /* Remove from local id hashmap */
3663 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3664 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3665 GNUNET_assert (GNUNET_YES ==
3666 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t));
3669 tunnel_send_destroy (t);
3671 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3677 * Handler for connection requests to new peers
3679 * @param cls closure
3680 * @param client identification of the client
3681 * @param message the actual message (PeerControl)
3684 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3685 const struct GNUNET_MessageHeader *message)
3687 struct GNUNET_MESH_PeerControl *peer_msg;
3688 struct MeshPeerInfo *peer_info;
3689 struct MeshClient *c;
3690 struct MeshTunnel *t;
3691 MESH_TunnelNumber tid;
3693 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3694 /* Sanity check for client registration */
3695 if (NULL == (c = client_get (client)))
3698 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3702 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3703 /* Sanity check for message size */
3704 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3707 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3711 /* Tunnel exists? */
3712 tid = ntohl (peer_msg->tunnel_id);
3713 t = tunnel_get_by_local_id (c, tid);
3717 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3721 /* Does client own tunnel? */
3722 if (t->client->handle != client)
3725 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3728 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3729 GNUNET_i2s(&peer_msg->peer));
3730 peer_info = peer_info_get (&peer_msg->peer);
3732 tunnel_add_peer(t, peer_info);
3733 peer_info_connect(peer_info, t);
3735 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3741 * Handler for disconnection requests of peers in a tunnel
3743 * @param cls closure
3744 * @param client identification of the client
3745 * @param message the actual message (PeerControl)
3748 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3749 const struct GNUNET_MessageHeader *message)
3751 struct GNUNET_MESH_PeerControl *peer_msg;
3752 struct MeshPeerInfo *peer_info;
3753 struct MeshClient *c;
3754 struct MeshTunnel *t;
3755 MESH_TunnelNumber tid;
3757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3758 /* Sanity check for client registration */
3759 if (NULL == (c = client_get (client)))
3762 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3765 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3766 /* Sanity check for message size */
3767 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3770 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3774 /* Tunnel exists? */
3775 tid = ntohl (peer_msg->tunnel_id);
3776 t = tunnel_get_by_local_id (c, tid);
3780 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3785 /* Does client own tunnel? */
3786 if (t->client->handle != client)
3789 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3793 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3794 "MESH: for peer %s\n",
3795 GNUNET_i2s(&peer_msg->peer));
3796 /* Is the peer in the tunnel? */
3797 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3798 &peer_msg->peer.hashPubKey);
3799 if (NULL == peer_info)
3802 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3806 /* Ok, delete peer from tunnel */
3807 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3808 &peer_msg->peer.hashPubKey);
3810 send_destroy_path (t, peer_info->id);
3811 tunnel_delete_peer(t, peer_info->id);
3812 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3818 * Handler for connection requests to new peers by type
3820 * @param cls closure
3821 * @param client identification of the client
3822 * @param message the actual message (ConnectPeerByType)
3825 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3826 const struct GNUNET_MessageHeader *message)
3828 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3829 struct MeshClient *c;
3830 struct MeshTunnel *t;
3831 GNUNET_HashCode hash;
3832 MESH_TunnelNumber tid;
3834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3835 /* Sanity check for client registration */
3836 if (NULL == (c = client_get (client)))
3839 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3843 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3844 /* Sanity check for message size */
3845 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3846 ntohs (connect_msg->header.size))
3849 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3853 /* Tunnel exists? */
3854 tid = ntohl (connect_msg->tunnel_id);
3855 t = tunnel_get_by_local_id (c, tid);
3859 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3863 /* Does client own tunnel? */
3864 if (t->client->handle != client)
3867 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3871 /* Do WE have the service? */
3872 t->type = ntohl (connect_msg->type);
3873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3874 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3875 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3878 /* Yes! Fast forward, add ourselves to the tunnel and send the
3879 * good news to the client
3881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3882 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3883 peer_info_get (&my_full_id),
3884 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3887 send_client_peer_connected(t, myid);
3888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3889 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3892 /* Ok, lets find a peer offering the service */
3893 if (NULL != t->dht_get_type)
3895 GNUNET_DHT_get_stop (t->dht_get_type);
3897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3898 GNUNET_h2s (&hash));
3900 GNUNET_DHT_get_start (dht_handle,
3901 GNUNET_TIME_UNIT_FOREVER_REL,
3902 GNUNET_BLOCK_TYPE_TEST,
3905 GNUNET_DHT_RO_RECORD_ROUTE |
3906 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3908 &dht_get_type_handler, t);
3910 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3916 * Handler for client traffic directed to one peer
3918 * @param cls closure
3919 * @param client identification of the client
3920 * @param message the actual message
3923 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3924 const struct GNUNET_MessageHeader *message)
3926 struct MeshClient *c;
3927 struct MeshTunnel *t;
3928 struct MeshPeerInfo *pi;
3929 struct GNUNET_MESH_Unicast *data_msg;
3930 MESH_TunnelNumber tid;
3933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3934 "MESH: Got a unicast request from a client!\n");
3936 /* Sanity check for client registration */
3937 if (NULL == (c = client_get (client)))
3940 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3943 data_msg = (struct GNUNET_MESH_Unicast *) message;
3944 /* Sanity check for message size */
3945 size = ntohs (message->size);
3946 if (sizeof (struct GNUNET_MESH_Unicast) +
3947 sizeof (struct GNUNET_MessageHeader) > size)
3950 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3954 /* Tunnel exists? */
3955 tid = ntohl (data_msg->tid);
3956 t = tunnel_get_by_local_id (c, tid);
3960 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3964 /* Is it a local tunnel? Then, does client own the tunnel? */
3965 if (NULL != t->client &&
3966 NULL != t->client->handle &&
3967 t->client->handle != client)
3970 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3974 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3975 &data_msg->destination.hashPubKey);
3976 /* Is the selected peer in the tunnel? */
3980 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3984 /* Ok, everything is correct, send the message
3985 * (pretend we got it from a mesh peer)
3988 char buf[ntohs (message->size)];
3989 struct GNUNET_MESH_Unicast *copy;
3991 /* Work around const limitation */
3992 copy = (struct GNUNET_MESH_Unicast *) buf;
3993 memcpy (buf, data_msg, size);
3994 copy->oid = my_full_id;
3995 copy->tid = htonl (t->id.tid);
3996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3997 "MESH: calling generic handler...\n");
3998 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
4000 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4006 * Handler for client traffic directed to the origin
4008 * @param cls closure
4009 * @param client identification of the client
4010 * @param message the actual message
4013 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4014 const struct GNUNET_MessageHeader *message)
4016 struct GNUNET_MESH_ToOrigin *data_msg;
4017 struct GNUNET_PeerIdentity id;
4018 struct MeshClient *c;
4019 struct MeshTunnel *t;
4020 MESH_TunnelNumber tid;
4023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4024 "MESH: Got a ToOrigin request from a client!\n");
4026 /* Sanity check for client registration */
4027 if (NULL == (c = client_get (client)))
4030 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4033 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4034 /* Sanity check for message size */
4035 size = ntohs (message->size);
4036 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4037 sizeof (struct GNUNET_MessageHeader) > size)
4040 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4044 /* Tunnel exists? */
4045 tid = ntohl (data_msg->tid);
4046 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4049 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4052 t = tunnel_get_by_local_id (c, tid);
4056 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4060 /* It shouldn't be a local tunnel. */
4061 if (NULL != t->client)
4064 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4067 GNUNET_PEER_resolve(t->id.oid, &id);
4069 /* Ok, everything is correct, send the message
4070 * (pretend we got it from a mesh peer)
4073 char buf[ntohs (message->size)];
4074 struct GNUNET_MESH_ToOrigin *copy;
4076 /* Work around const limitation */
4077 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4078 memcpy (buf, data_msg, size);
4080 copy->tid = htonl (t->id.tid);
4081 copy->sender = my_full_id;
4082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4083 "MESH: calling generic handler...\n");
4084 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
4086 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4092 * Handler for client traffic directed to all peers in a tunnel
4094 * @param cls closure
4095 * @param client identification of the client
4096 * @param message the actual message
4099 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
4100 const struct GNUNET_MessageHeader *message)
4102 struct MeshClient *c;
4103 struct MeshTunnel *t;
4104 struct GNUNET_MESH_Multicast *data_msg;
4105 MESH_TunnelNumber tid;
4107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4108 "MESH: Got a multicast request from a client!\n");
4110 /* Sanity check for client registration */
4111 if (NULL == (c = client_get (client)))
4114 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4117 data_msg = (struct GNUNET_MESH_Multicast *) message;
4118 /* Sanity check for message size */
4119 if (sizeof (struct GNUNET_MESH_Multicast) +
4120 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4123 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4127 /* Tunnel exists? */
4128 tid = ntohl (data_msg->tid);
4129 t = tunnel_get_by_local_id (c, tid);
4133 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4137 /* Does client own tunnel? */
4138 if (t->client->handle != client)
4141 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4146 char buf[ntohs(message->size)];
4147 struct GNUNET_MESH_Multicast *copy;
4149 copy = (struct GNUNET_MESH_Multicast *)buf;
4150 memcpy(buf, message, ntohs(message->size));
4151 copy->oid = my_full_id;
4152 copy->tid = htonl(t->id.tid);
4153 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4154 "MESH: calling generic handler...\n");
4155 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4158 /* receive done gets called when last copy is sent to a neighbor */
4163 * Functions to handle messages from clients
4165 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4166 {&handle_local_new_client, NULL,
4167 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4168 {&handle_local_tunnel_create, NULL,
4169 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4170 sizeof (struct GNUNET_MESH_TunnelMessage)},
4171 {&handle_local_tunnel_destroy, NULL,
4172 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4173 sizeof (struct GNUNET_MESH_TunnelMessage)},
4174 {&handle_local_connect_add, NULL,
4175 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4176 sizeof (struct GNUNET_MESH_PeerControl)},
4177 {&handle_local_connect_del, NULL,
4178 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4179 sizeof (struct GNUNET_MESH_PeerControl)},
4180 {&handle_local_connect_by_type, NULL,
4181 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4182 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4183 {&handle_local_unicast, NULL,
4184 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4185 {&handle_local_to_origin, NULL,
4186 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4187 {&handle_local_multicast, NULL,
4188 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4194 * To be called on core init/fail.
4196 * @param cls service closure
4197 * @param server handle to the server for this service
4198 * @param identity the public identity of this peer
4201 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4202 const struct GNUNET_PeerIdentity *identity)
4204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4205 core_handle = server;
4206 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4208 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4209 GNUNET_SCHEDULER_shutdown();
4215 * Method called whenever a given peer connects.
4217 * @param cls closure
4218 * @param peer peer identity this notification is about
4219 * @param atsi performance data for the connection
4220 * @param atsi_count number of records in 'atsi'
4223 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4224 const struct GNUNET_ATS_Information *atsi,
4225 unsigned int atsi_count)
4227 struct MeshPeerInfo *peer_info;
4228 struct MeshPeerPath *path;
4230 #if MESH_DEBUG_CONNECTION
4231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4233 GNUNET_i2s(&my_full_id));
4235 peer_info = peer_info_get (peer);
4236 if (myid == peer_info->id)
4238 #if MESH_DEBUG_CONNECTION
4239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4243 #if MESH_DEBUG_CONNECTION
4246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4250 path = path_new (2);
4251 path->peers[0] = myid;
4252 path->peers[1] = peer_info->id;
4253 GNUNET_PEER_change_rc(myid, 1);
4254 GNUNET_PEER_change_rc(peer_info->id, 1);
4255 path_add_to_peer (peer_info, path, GNUNET_YES);
4260 * Method called whenever a peer disconnects.
4262 * @param cls closure
4263 * @param peer peer identity this notification is about
4266 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4268 struct MeshPeerInfo *pi;
4271 #if MESH_DEBUG_CONNECTION
4272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4274 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4280 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4282 /* TODO: notify that the transmission failed */
4283 peer_info_cancel_transmission(pi, i);
4285 path_remove_from_peer (pi, pi->id, myid);
4286 #if MESH_DEBUG_CONNECTION
4289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4296 /******************************************************************************/
4297 /************************ MAIN FUNCTIONS ****************************/
4298 /******************************************************************************/
4301 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4303 * @param cls closure
4304 * @param key current key code
4305 * @param value value in the hash map
4306 * @return GNUNET_YES if we should continue to iterate,
4310 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4312 struct MeshTunnel *t = value;
4318 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4320 * @param cls closure
4321 * @param key current key code
4322 * @param value value in the hash map
4323 * @return GNUNET_YES if we should continue to iterate,
4327 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4329 struct MeshPeerInfo *p = value;
4330 peer_info_destroy (p);
4335 * Task run during shutdown.
4341 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4344 /* TODO: destroy tunnels? */
4345 if (core_handle != NULL)
4347 GNUNET_CORE_disconnect (core_handle);
4350 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4351 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4352 if (dht_handle != NULL)
4354 GNUNET_DHT_disconnect (dht_handle);
4359 GNUNET_SERVER_notification_context_destroy (nc);
4362 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4364 GNUNET_SCHEDULER_cancel (announce_id_task);
4365 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4371 * Process mesh requests.
4373 * @param cls closure
4374 * @param server the initialized server
4375 * @param c configuration to use
4378 run (void *cls, struct GNUNET_SERVER_Handle *server,
4379 const struct GNUNET_CONFIGURATION_Handle *c)
4381 struct MeshPeerInfo *peer;
4382 struct MeshPeerPath *p;
4385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4386 server_handle = server;
4387 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4388 CORE_QUEUE_SIZE, /* queue size */
4389 NULL, /* Closure passed to MESH functions */
4390 &core_init, /* Call core_init once connected */
4391 &core_connect, /* Handle connects */
4392 &core_disconnect, /* remove peers on disconnects */
4393 NULL, /* Don't notify about all incoming messages */
4394 GNUNET_NO, /* For header only in notification */
4395 NULL, /* Don't notify about all outbound messages */
4396 GNUNET_NO, /* For header-only out notification */
4397 core_handlers); /* Register these handlers */
4399 if (core_handle == NULL)
4402 GNUNET_SCHEDULER_shutdown ();
4407 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4410 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4412 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4413 GNUNET_SCHEDULER_shutdown ();
4416 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4417 GNUNET_free (keyfile);
4418 if (my_private_key == NULL)
4420 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4421 _("Mesh service could not access hostkey. Exiting.\n"));
4422 GNUNET_SCHEDULER_shutdown ();
4425 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4426 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4427 &my_full_id.hashPubKey);
4428 myid = GNUNET_PEER_intern (&my_full_id);
4430 // // transport_handle = GNUNET_TRANSPORT_connect(c,
4437 dht_handle = GNUNET_DHT_connect (c, 64);
4438 if (dht_handle == NULL)
4444 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4446 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4447 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4448 peers = GNUNET_CONTAINER_multihashmap_create (32);
4449 applications = GNUNET_CONTAINER_multihashmap_create (32);
4450 types = GNUNET_CONTAINER_multihashmap_create (32);
4452 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4453 nc = GNUNET_SERVER_notification_context_create (server_handle,
4455 GNUNET_SERVER_disconnect_notify (server_handle,
4456 &handle_local_client_disconnect,
4461 clients_tail = NULL;
4466 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4467 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4469 /* Create a peer_info for the local peer */
4470 peer = peer_info_get(&my_full_id);
4473 GNUNET_PEER_change_rc (myid, 1);
4474 path_add_to_peer(peer, p, GNUNET_YES);
4476 /* Scheduled the task to clean up when shutdown is called */
4477 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4484 * The main function for the mesh service.
4486 * @param argc number of arguments from the command line
4487 * @param argv command line arguments
4488 * @return 0 ok, 1 on error
4491 main (int argc, char *const *argv)
4495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4498 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");