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);
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.
1517 * TODO: trim the part from origin to us? Add it as path to origin?
1520 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1522 struct MeshPeerPath *aux;
1526 if ((NULL == peer_info) || (NULL == path))
1529 path_destroy (path);
1532 for (l = 1; l < path->length; l++)
1534 if (path->peers[l] == myid)
1536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1537 "MESH: shortening path by %u\n",
1539 for (l2 = 0; l2 < path->length - l - 1 ; l2++)
1541 path->peers[l2] = path->peers[l + l2];
1545 path->peers = GNUNET_realloc (path->peers,
1546 path->length * sizeof (GNUNET_PEER_Id));
1551 struct GNUNET_PeerIdentity id;
1553 GNUNET_PEER_resolve (peer_info->id, &id);
1554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1555 "MESH: adding path [%u] to peer %s\n",
1560 l = path_get_length (path);
1567 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1569 l2 = path_get_length (aux);
1572 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1573 peer_info->path_tail,
1580 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1587 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1588 peer_info->path_tail,
1595 * Add the path to the origin peer and update the path used to reach it in case
1596 * this is the shortest.
1597 * The path is given in peer_info -> destination, therefore we turn the path
1598 * upside down first.
1600 * @param peer_info Peer to add the path to, being the origin of the path.
1601 * @param path New path to add after being inversed.
1604 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1607 path_add_to_peer (peer_info, path);
1612 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1613 * to obtain a local peer -> destination path and interning the peer ids.
1615 * @return Newly allocated and created path
1617 static struct MeshPeerPath *
1618 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1619 unsigned int get_path_length,
1620 const struct GNUNET_PeerIdentity *put_path,
1621 unsigned int put_path_length)
1623 struct MeshPeerPath *p;
1629 GNUNET_PEER_change_rc(myid, 1);
1630 i = get_path_length;
1631 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1632 for (i--; i >= 0; i--)
1634 id = GNUNET_PEER_intern (&get_path[i]);
1635 if (p->length > 0 && id == p->peers[p->length - 1])
1637 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1638 GNUNET_PEER_change_rc(id, -1);
1642 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1643 "MESH: Adding from GET: %s.\n",
1644 GNUNET_i2s(&get_path[i]));
1646 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1647 p->peers[p->length - 1] = id;
1650 i = put_path_length;
1651 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1652 for (i--; i >= 0; i--)
1654 id = GNUNET_PEER_intern (&put_path[i]);
1657 /* PUT path went through us, so discard the path up until now and start
1658 * from here to get a much shorter (and loop-free) path.
1663 if (p->length > 0 && id == p->peers[p->length - 1])
1665 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1666 GNUNET_PEER_change_rc(id, -1);
1670 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1671 "MESH: Adding from PUT: %s.\n",
1672 GNUNET_i2s(&put_path[i]));
1674 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1675 p->peers[p->length - 1] = id;
1679 if (get_path_length > 0)
1680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1681 "MESH: (first of GET: %s)\n",
1682 GNUNET_i2s(&get_path[0]));
1683 if (put_path_length > 0)
1684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1685 "MESH: (first of PUT: %s)\n",
1686 GNUNET_i2s(&put_path[0]));
1687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1688 "MESH: In total: %d hops\n",
1690 for (i = 0; i < p->length; i++)
1692 struct GNUNET_PeerIdentity peer_id;
1694 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1698 GNUNET_i2s(&peer_id));
1706 * Send keepalive packets for a peer
1708 * @param cls Closure (tunnel for which to send the keepalive).
1709 * @param tc Notification context.
1711 * TODO: implement explicit multicast keepalive?
1714 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1718 * Search for a tunnel among the tunnels for a client
1720 * @param c the client whose tunnels to search in
1721 * @param tid the local id of the tunnel
1723 * @return tunnel handler, NULL if doesn't exist
1725 static struct MeshTunnel *
1726 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1728 GNUNET_HashCode hash;
1730 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1731 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1733 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1735 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1740 * Search for a tunnel by global ID using PEER_ID
1742 * @param pi owner of the tunnel
1743 * @param tid global tunnel number
1745 * @return tunnel handler, NULL if doesn't exist
1747 static struct MeshTunnel *
1748 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1750 struct MESH_TunnelID id;
1751 GNUNET_HashCode hash;
1756 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1757 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1762 * Search for a tunnel by global ID using full PeerIdentities
1764 * @param oid owner of the tunnel
1765 * @param tid global tunnel number
1767 * @return tunnel handler, NULL if doesn't exist
1769 static struct MeshTunnel *
1770 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1772 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1777 * Callback used to notify a client owner of a tunnel that a peer has
1778 * disconnected, most likely because of a path change.
1780 * @param n Node in the tree representing the disconnected peer
1782 * FIXME: pass tunnel via cls, make param just a peer identity
1785 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1787 struct MeshPeerInfo *peer;
1788 struct MeshPathInfo *path_info;
1790 if (NULL != n->t->client && NULL != nc)
1792 struct GNUNET_MESH_PeerControl msg;
1793 msg.header.size = htons (sizeof (msg));
1794 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1795 msg.tunnel_id = htonl (n->t->local_tid);
1796 GNUNET_PEER_resolve (n->peer, &msg.peer);
1797 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1798 &msg.header, GNUNET_NO);
1800 peer = peer_info_get_short(n->peer);
1801 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1802 path_info->peer = peer;
1803 path_info->t = n->t;
1804 GNUNET_SCHEDULER_add_now(&peer_info_connect_task, path_info);
1809 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1810 * needed rescources.
1811 * If peer already exists, reevaluate shortest path and change if different.
1813 * @param t Tunnel we want to add a new peer to
1814 * @param peer PeerInfo of the peer being added
1818 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1820 struct GNUNET_PeerIdentity id;
1821 struct MeshPeerPath *best_p;
1822 struct MeshPeerPath *p;
1823 unsigned int best_cost;
1826 GNUNET_PEER_resolve(peer->id, &id);
1828 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1831 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1832 GNUNET_CONTAINER_multihashmap_put(
1836 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1839 if (NULL != (p = peer->path_head))
1842 best_cost = path_get_cost(t->tree, p);
1845 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1852 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1853 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1854 t->path_refresh_task =
1855 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1859 /* Start a DHT get if necessary */
1860 peer_info_connect(peer, t);
1865 * Add a path to a tunnel which we don't own, just to remember the next hop.
1866 * If destination node was already in the tunnel, the first hop information
1867 * will be replaced with the new path.
1869 * @param t Tunnel we want to add a new peer to
1870 * @param p Path to add
1871 * @param own_pos Position of local node in path.
1875 tunnel_add_path (struct MeshTunnel *t,
1876 struct MeshPeerPath *p,
1877 unsigned int own_pos)
1879 struct GNUNET_PeerIdentity id;
1881 GNUNET_assert (0 != own_pos);
1882 tree_add_path(t->tree, p, NULL);
1883 if (NULL == t->tree->me)
1884 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1885 if (own_pos < p->length - 1)
1887 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1888 tree_update_first_hops(t->tree, t->tree->me, &id);
1894 * Notifies a tunnel that a connection has broken that affects at least
1895 * some of its peers. Sends a notification towards the root of the tree.
1896 * In case the peer is the owner of the tree, notifies the client that owns
1897 * the tunnel and tries to reconnect.
1899 * @param t Tunnel affected.
1900 * @param p1 Peer that got disconnected from p2.
1901 * @param p2 Peer that got disconnected from p1.
1903 * @return Short ID of the peer disconnected (either p1 or p2).
1904 * 0 if the tunnel remained unaffected.
1906 static GNUNET_PEER_Id
1907 tunnel_notify_connection_broken (struct MeshTunnel *t,
1913 pid = tree_notify_connection_broken (t->tree,
1916 ¬ify_peer_disconnected);
1917 if (myid != p1 && myid != p2)
1923 if (NULL != t->tree->me->parent)
1925 /* We are the peer still connected, notify owner of the disconnection. */
1926 struct GNUNET_MESH_PathBroken msg;
1927 struct GNUNET_PeerIdentity neighbor;
1929 msg.header.size = htons (sizeof (msg));
1930 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1931 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1932 msg.tid = htonl (t->id.tid);
1933 msg.peer1 = my_full_id;
1934 GNUNET_PEER_resolve (pid, &msg.peer2);
1935 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1936 send_message (&msg.header, &neighbor);
1944 * Send a message in a tunnel in multicast, sending a copy to each child node
1945 * down the local one in the tunnel tree.
1947 * @param t Tunnel in which to send the data.
1948 * @param msg Message to be sent
1950 * @return Number of copies sent.
1952 * TODO: unifiy shared resources and reference counter management
1955 tunnel_send_multicast (struct MeshTunnel *t,
1956 const struct GNUNET_MessageHeader *msg)
1958 struct GNUNET_PeerIdentity neighbor;
1959 struct MeshDataDescriptor *info;
1960 struct MeshTunnelTreeNode *n;
1961 struct MeshTunnelTreeNode *counter;
1962 GNUNET_SCHEDULER_TaskIdentifier *task;
1963 unsigned int *copies;
1968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1969 "MESH: sending a multicast packet...\n");
1970 size = ntohs (msg->size);
1971 GNUNET_assert (NULL != t->tree->me);
1972 n = t->tree->me->children_head;
1975 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1976 "MESH: no children in the tree, no one to send.\n");
1979 copies = GNUNET_malloc (sizeof (unsigned int));
1980 for (counter = n; NULL != counter; counter = counter->next)
1982 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1983 data = GNUNET_malloc (size);
1984 memcpy (data, msg, size);
1985 if (NULL != t->client)
1987 task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
1988 *task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1993 task = NULL; // So GCC shuts up about task being potentially uninitialized
1996 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1999 info->copies = copies;
2000 if (NULL != t->client)
2002 info->client = t->client->handle;
2003 info->timeout_task = task;
2005 info->destination = n->peer;
2006 GNUNET_PEER_resolve (n->peer, &neighbor);
2007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2008 "MESH: sending to %s...\n",
2009 GNUNET_i2s (&neighbor));
2010 info->peer = peer_info_get(&neighbor);
2011 GNUNET_assert (NULL != info->peer);
2012 i = peer_info_transmit_slot(info->peer);
2013 info->handler_n = i;
2014 info->peer->infos[i] = info;
2015 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2016 info->peer->core_transmit[i] =
2017 GNUNET_CORE_notify_transmit_ready (core_handle,
2020 GNUNET_TIME_UNIT_FOREVER_REL,
2023 &send_core_data_multicast, info);
2031 * Send a message to all peers in this tunnel that the tunnel is no longer
2034 * @param t The tunnel whose peers to notify.
2037 tunnel_send_destroy (struct MeshTunnel *t)
2039 struct GNUNET_MESH_TunnelDestroy msg;
2041 msg.header.size = htons (sizeof (msg));
2042 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2043 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2044 msg.tid = htonl (t->id.tid);
2045 tunnel_send_multicast (t, &msg.header);
2051 * Destroy the tunnel and free any allocated resources linked to it
2053 * @param t the tunnel to destroy
2055 * @return GNUNET_OK on success
2058 tunnel_destroy (struct MeshTunnel *t)
2060 struct MeshClient *c;
2061 struct MeshQueue *q;
2062 struct MeshQueue *qn;
2063 GNUNET_HashCode hash;
2072 struct GNUNET_PeerIdentity id;
2074 GNUNET_PEER_resolve(t->id.oid, &id);
2075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2076 "MESH: destroying tunnel %s [%x]\n",
2080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2084 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2085 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2090 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2092 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2096 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2098 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2099 GNUNET_break (GNUNET_YES ==
2100 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2103 if (NULL != t->peers)
2105 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2106 &peer_info_delete_tunnel, t);
2107 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2112 if (NULL != q->data)
2113 GNUNET_free (q->data);
2117 /* TODO cancel core transmit ready in case it was active */
2119 tree_destroy(t->tree);
2120 if (NULL != t->dht_get_type)
2121 GNUNET_DHT_get_stop(t->dht_get_type);
2122 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2123 GNUNET_SCHEDULER_cancel(t->timeout_task);
2124 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2125 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2132 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2133 * that are no longer needed, as well as nodes of no longer reachable peers.
2134 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2136 * @param t Tunnel from which to remove the path.
2137 * @param p Peer which should be removed.
2140 tunnel_delete_peer (struct MeshTunnel *t,
2141 GNUNET_PEER_Id peer)
2143 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2144 if (NULL == t->tree->root)
2150 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2151 * client when the client disconnects.
2153 * @param cls closure (client that is disconnecting)
2154 * @param key the hash of the local tunnel id (used to access the hashmap)
2155 * @param value the value stored at the key (tunnel to destroy)
2157 * @return GNUNET_OK on success
2160 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2162 struct MeshTunnel *t = value;
2165 if (NULL != t->dht_get_type)
2167 GNUNET_DHT_get_stop (t->dht_get_type);
2169 r = tunnel_destroy (t);
2175 * Timeout function, destroys tunnel if called
2177 * @param cls Closure (tunnel to destroy).
2178 * @param tc TaskContext
2181 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2183 struct MeshTunnel *t = cls;
2185 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2187 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2192 * Resets the tunnel timeout. Starts it if no timeout was running.
2194 * @param t Tunnel whose timeout to reset.
2197 tunnel_reset_timeout (struct MeshTunnel *t)
2199 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2200 GNUNET_SCHEDULER_cancel (t->timeout_task);
2201 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2202 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2208 /******************************************************************************/
2209 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2210 /******************************************************************************/
2213 * Function called to notify a client about the socket
2214 * being ready to queue more data. "buf" will be
2215 * NULL and "size" zero if the socket was closed for
2216 * writing in the meantime.
2218 * @param cls closure
2219 * @param size number of bytes available in buf
2220 * @param buf where the callee should write the message
2221 * @return number of bytes written to buf
2224 send_core_create_path (void *cls, size_t size, void *buf)
2226 struct MeshPathInfo *info = cls;
2227 struct GNUNET_MESH_ManipulatePath *msg;
2228 struct GNUNET_PeerIdentity *peer_ptr;
2229 struct MeshPeerInfo *peer = info->peer;
2230 struct MeshTunnel *t = info->t;
2231 struct MeshPeerPath *p = info->path;
2235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2236 "MESH: CREATE PATH sending...\n");
2238 sizeof (struct GNUNET_MESH_ManipulatePath) +
2239 p->length * sizeof (struct GNUNET_PeerIdentity);
2241 if (size < size_needed || NULL == buf)
2243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2247 info->peer->core_transmit[info->pos] =
2248 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2249 GNUNET_TIME_UNIT_FOREVER_REL,
2250 path_get_first_hop (t->tree, peer->id),
2252 &send_core_create_path,
2256 info->peer->core_transmit[info->pos] = NULL;
2259 struct GNUNET_PeerIdentity id;
2261 GNUNET_PEER_resolve (peer->id, &id);
2262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2263 "MESH: setting core_transmit %s [%u] to NULL\n",
2268 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2269 msg->header.size = htons (size_needed);
2270 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2271 msg->tid = ntohl (t->id.tid);
2273 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2274 for (i = 0; i < p->length; i++)
2276 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2283 "MESH: CREATE PATH (%u bytes long) sent!\n",
2290 * Function called to notify a client about the socket
2291 * being ready to queue more data. "buf" will be
2292 * NULL and "size" zero if the socket was closed for
2293 * writing in the meantime.
2295 * @param cls closure (data itself)
2296 * @param size number of bytes available in buf
2297 * @param buf where the callee should write the message
2299 * @return number of bytes written to buf
2302 send_core_data_multicast (void *cls, size_t size, void *buf)
2304 struct MeshDataDescriptor *info = cls;
2307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2308 GNUNET_assert (NULL != info);
2309 GNUNET_assert (NULL != info->peer);
2310 total_size = info->size;
2311 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2313 if (total_size > size)
2316 struct GNUNET_PeerIdentity id;
2318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2319 "MESH: Multicast: retransmitting... (%u/%u)\n",
2321 GNUNET_PEER_resolve(info->peer->id, &id);
2322 info->peer->core_transmit[info->handler_n] =
2323 GNUNET_CORE_notify_transmit_ready (core_handle,
2326 GNUNET_TIME_UNIT_FOREVER_REL,
2329 &send_core_data_multicast,
2333 info->peer->core_transmit[info->handler_n] = NULL;
2334 info->peer->infos[info->handler_n] = NULL;
2335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2336 memcpy (buf, info->data, total_size);
2339 struct GNUNET_MESH_Multicast *mc;
2340 struct GNUNET_MessageHeader *mh;
2343 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2345 mc = (struct GNUNET_MESH_Multicast *) mh;
2346 mh = (struct GNUNET_MessageHeader *) &mc[1];
2347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2348 "MESH: multicast, payload type %u\n",
2350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2351 "MESH: multicast, payload size %u\n",
2356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2362 data_descriptor_decrement_multicast (info);
2363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2371 * Function called to notify a client about the socket
2372 * being ready to queue more data. "buf" will be
2373 * NULL and "size" zero if the socket was closed for
2374 * writing in the meantime.
2376 * @param cls closure (MeshDataDescriptor)
2377 * @param size number of bytes available in buf
2378 * @param buf where the callee should write the message
2379 * @return number of bytes written to buf
2382 send_core_path_ack (void *cls, size_t size, void *buf)
2384 struct MeshDataDescriptor *info = cls;
2385 struct GNUNET_MESH_PathACK *msg = buf;
2387 GNUNET_assert (NULL != info);
2390 info->peer->core_transmit[info->handler_n] = NULL;
2392 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2397 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2398 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2399 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2400 msg->tid = htonl (info->origin->tid);
2401 msg->peer_id = my_full_id;
2403 /* TODO add signature */
2405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2406 return sizeof (struct GNUNET_MESH_PathACK);
2410 /******************************************************************************/
2411 /******************** MESH NETWORK HANDLERS **************************/
2412 /******************************************************************************/
2416 * Core handler for path creation
2418 * @param cls closure
2419 * @param message message
2420 * @param peer peer identity this notification is about
2421 * @param atsi performance data
2422 * @param atsi_count number of records in 'atsi'
2424 * @return GNUNET_OK to keep the connection open,
2425 * GNUNET_SYSERR to close it (signal serious error)
2428 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2429 const struct GNUNET_MessageHeader *message,
2430 const struct GNUNET_ATS_Information *atsi,
2431 unsigned int atsi_count)
2433 unsigned int own_pos;
2436 MESH_TunnelNumber tid;
2437 struct GNUNET_MESH_ManipulatePath *msg;
2438 struct GNUNET_PeerIdentity *pi;
2439 GNUNET_HashCode hash;
2440 struct MeshPeerPath *path;
2441 struct MeshPeerInfo *dest_peer_info;
2442 struct MeshPeerInfo *orig_peer_info;
2443 struct MeshTunnel *t;
2445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2446 "MESH: Received a path create msg [%s]\n",
2447 GNUNET_i2s(&my_full_id));
2448 size = ntohs (message->size);
2449 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2451 GNUNET_break_op (0);
2455 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2456 if (size % sizeof (struct GNUNET_PeerIdentity))
2458 GNUNET_break_op (0);
2461 size /= sizeof (struct GNUNET_PeerIdentity);
2464 GNUNET_break_op (0);
2467 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2468 "MESH: path has %u hops.\n",
2470 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2472 tid = ntohl (msg->tid);
2473 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2474 t = tunnel_get (pi, tid);
2475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2476 "MESH: path is for tunnel %s [%X].\n",
2481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2482 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2483 t->id.oid = GNUNET_PEER_intern (pi);
2485 t->local_tid = next_local_tid++;
2486 /* FIXME test if taken */
2487 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2488 t->tree = tree_new(t, t->id.oid);
2490 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2492 GNUNET_CONTAINER_multihashmap_put (
2496 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2502 tunnel_reset_timeout (t);
2503 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2505 GNUNET_CONTAINER_multihashmap_put (
2509 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2517 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2518 if (NULL == dest_peer_info)
2520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2521 "MESH: Creating PeerInfo for destination.\n");
2522 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2523 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2524 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2526 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2528 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2529 if (NULL == orig_peer_info)
2531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2532 "MESH: Creating PeerInfo for origin.\n");
2533 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2534 orig_peer_info->id = GNUNET_PEER_intern (pi);
2535 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2536 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2539 path = path_new (size);
2541 for (i = 0; i < size; i++)
2543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2544 "MESH: ... adding %s\n",
2545 GNUNET_i2s(&pi[i]));
2546 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2547 if (path->peers[i] == myid)
2550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2551 "MESH: Own position: %u\n", own_pos);
2554 /* cannot be self, must be 'not found' */
2555 /* create path: self not found in path through self */
2556 GNUNET_break_op (0);
2557 path_destroy (path);
2558 /* FIXME error. destroy tunnel? leave for timeout? */
2561 tunnel_add_path (t, path, own_pos);
2562 if (own_pos == size - 1)
2564 /* It is for us! Send ack. */
2565 struct GNUNET_MESH_TunnelNotification cmsg;
2566 struct MeshDataDescriptor *info;
2569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2570 "MESH: It's for us!\n");
2571 path_add_to_origin (orig_peer_info, path);
2572 if (NULL == t->peers)
2573 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2574 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2576 &my_full_id.hashPubKey,
2577 peer_info_get(&my_full_id),
2578 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2579 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2580 info->origin = &t->id;
2581 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2582 GNUNET_assert (NULL != info->peer);
2583 j = peer_info_transmit_slot(info->peer);
2584 info->handler_n = j;
2585 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2586 info->peer->infos[j] = info;
2587 info->peer->core_transmit[j] =
2588 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2589 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2590 sizeof (struct GNUNET_MESH_PathACK),
2591 &send_core_path_ack, info);
2592 cmsg.header.size = htons(sizeof(cmsg));
2593 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2594 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2595 cmsg.tunnel_id = htonl(t->local_tid);
2596 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2600 struct MeshPeerPath *path2;
2602 /* It's for somebody else! Retransmit. */
2603 path2 = path_duplicate(path);
2604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2605 "MESH: Retransmitting.\n");
2606 path_add_to_peer(dest_peer_info, path);
2607 path = path_duplicate(path2);
2608 path_add_to_origin(orig_peer_info, path2);
2609 send_create_path(dest_peer_info, path, t);
2616 * Core handler for path destruction
2618 * @param cls closure
2619 * @param message message
2620 * @param peer peer identity this notification is about
2621 * @param atsi performance data
2622 * @param atsi_count number of records in 'atsi'
2624 * @return GNUNET_OK to keep the connection open,
2625 * GNUNET_SYSERR to close it (signal serious error)
2628 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2629 const struct GNUNET_MessageHeader *message,
2630 const struct GNUNET_ATS_Information *atsi,
2631 unsigned int atsi_count)
2633 struct GNUNET_MESH_ManipulatePath *msg;
2634 struct GNUNET_PeerIdentity *pi;
2635 struct MeshPeerPath *path;
2636 struct MeshTunnel *t;
2637 unsigned int own_pos;
2641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2642 "MESH: Received a PATH DESTROY msg from %s\n",
2644 size = ntohs (message->size);
2645 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2647 GNUNET_break_op (0);
2651 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2652 if (size % sizeof (struct GNUNET_PeerIdentity))
2654 GNUNET_break_op (0);
2657 size /= sizeof (struct GNUNET_PeerIdentity);
2660 GNUNET_break_op (0);
2663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2664 "MESH: path has %u hops.\n",
2667 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2668 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2670 "MESH: path is for tunnel %s [%X].\n",
2673 t = tunnel_get (pi, ntohl (msg->tid));
2676 /* TODO notify back: we don't know this tunnel */
2677 GNUNET_break_op (0);
2680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2681 path = path_new (size);
2683 for (i = 0; i < size; i++)
2685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2686 "MESH: ... adding %s\n",
2687 GNUNET_i2s(&pi[i]));
2688 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2689 if (path->peers[i] == myid)
2692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2693 "MESH: Own position: %u\n", own_pos);
2694 if (own_pos < path->length - 1)
2695 send_message (message, &pi[own_pos + 1]);
2696 tunnel_delete_peer (t, path->peers[path->length - 1]);
2697 path_destroy (path);
2703 * Core handler for notifications of broken paths
2705 * @param cls closure
2706 * @param message message
2707 * @param peer peer identity this notification is about
2708 * @param atsi performance data
2709 * @param atsi_count number of records in 'atsi'
2711 * @return GNUNET_OK to keep the connection open,
2712 * GNUNET_SYSERR to close it (signal serious error)
2715 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2716 const struct GNUNET_MessageHeader *message,
2717 const struct GNUNET_ATS_Information *atsi,
2718 unsigned int atsi_count)
2720 struct GNUNET_MESH_PathBroken *msg;
2721 struct MeshTunnel *t;
2723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2724 "MESH: Received a PATH BROKEN msg from %s\n",
2726 msg = (struct GNUNET_MESH_PathBroken *) message;
2727 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2728 "MESH: regarding %s\n",
2729 GNUNET_i2s(&msg->peer1));
2730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2731 "MESH: regarding %s\n",
2732 GNUNET_i2s(&msg->peer2));
2733 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2736 GNUNET_break_op (0);
2739 tunnel_notify_connection_broken(t,
2740 GNUNET_PEER_search(&msg->peer1),
2741 GNUNET_PEER_search(&msg->peer2));
2748 * Core handler for tunnel destruction
2750 * @param cls closure
2751 * @param message message
2752 * @param peer peer identity this notification is about
2753 * @param atsi performance data
2754 * @param atsi_count number of records in 'atsi'
2756 * @return GNUNET_OK to keep the connection open,
2757 * GNUNET_SYSERR to close it (signal serious error)
2760 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2761 const struct GNUNET_MessageHeader *message,
2762 const struct GNUNET_ATS_Information *atsi,
2763 unsigned int atsi_count)
2765 struct GNUNET_MESH_TunnelDestroy *msg;
2766 struct MeshTunnel *t;
2768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2769 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2771 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2773 "MESH: for tunnel %s [%u]\n",
2774 GNUNET_i2s (&msg->oid),
2776 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2779 /* Probably already got the message from another path,
2780 * destroyed the tunnel and retransmitted to children.
2785 if (t->id.oid == myid)
2787 GNUNET_break_op (0);
2790 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2792 /* Tunnel was incoming, notify clients */
2793 send_clients_tunnel_destroy (t);
2795 tunnel_send_destroy (t);
2802 * Core handler for mesh network traffic going from the origin to a peer
2804 * @param cls closure
2805 * @param peer peer identity this notification is about
2806 * @param message message
2807 * @param atsi performance data
2808 * @param atsi_count number of records in 'atsi'
2809 * @return GNUNET_OK to keep the connection open,
2810 * GNUNET_SYSERR to close it (signal serious error)
2813 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2814 const struct GNUNET_MessageHeader *message,
2815 const struct GNUNET_ATS_Information *atsi,
2816 unsigned int atsi_count)
2818 struct GNUNET_MESH_Unicast *msg;
2819 struct MeshTunnel *t;
2823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2824 "MESH: got a unicast packet from %s\n",
2826 size = ntohs (message->size);
2828 sizeof (struct GNUNET_MESH_Unicast) +
2829 sizeof (struct GNUNET_MessageHeader))
2834 msg = (struct GNUNET_MESH_Unicast *) message;
2835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2836 "MESH: of type %u\n",
2837 ntohs (msg[1].header.type));
2838 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2841 /* TODO notify back: we don't know this tunnel */
2842 GNUNET_break_op (0);
2845 tunnel_reset_timeout (t);
2846 pid = GNUNET_PEER_search(&msg->destination);
2849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2850 "MESH: it's for us! sending to clients...\n");
2851 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2855 "MESH: not for us, retransmitting...\n");
2856 send_message (message, path_get_first_hop(t->tree, pid));
2862 * Core handler for mesh network traffic going from the origin to all peers
2864 * @param cls closure
2865 * @param message message
2866 * @param peer peer identity this notification is about
2867 * @param atsi performance data
2868 * @param atsi_count number of records in 'atsi'
2869 * @return GNUNET_OK to keep the connection open,
2870 * GNUNET_SYSERR to close it (signal serious error)
2872 * TODO: Check who we got this from, to validate route.
2875 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2876 const struct GNUNET_MessageHeader *message,
2877 const struct GNUNET_ATS_Information *atsi,
2878 unsigned int atsi_count)
2880 struct GNUNET_MESH_Multicast *msg;
2881 struct MeshTunnel *t;
2884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2885 "MESH: got a multicast packet from %s\n",
2887 size = ntohs (message->size);
2888 if (sizeof (struct GNUNET_MESH_Multicast) +
2889 sizeof (struct GNUNET_MessageHeader) > size)
2891 GNUNET_break_op (0);
2894 msg = (struct GNUNET_MESH_Multicast *) message;
2895 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2899 /* TODO notify that we dont know that tunnel */
2900 GNUNET_break_op (0);
2903 tunnel_reset_timeout (t);
2905 /* Transmit to locally interested clients */
2906 if (NULL != t->peers &&
2907 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2909 send_subscribed_clients (message, &msg[1].header);
2911 tunnel_send_multicast(t, message);
2917 * Core handler for mesh network traffic toward the owner of a tunnel
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'
2925 * @return GNUNET_OK to keep the connection open,
2926 * GNUNET_SYSERR to close it (signal serious error)
2929 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2930 const struct GNUNET_MessageHeader *message,
2931 const struct GNUNET_ATS_Information *atsi,
2932 unsigned int atsi_count)
2934 struct GNUNET_MESH_ToOrigin *msg;
2935 struct GNUNET_PeerIdentity id;
2936 struct MeshPeerInfo *peer_info;
2937 struct MeshTunnel *t;
2940 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2941 "MESH: got a ToOrigin packet from %s\n",
2943 size = ntohs (message->size);
2944 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2945 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2947 GNUNET_break_op (0);
2950 msg = (struct GNUNET_MESH_ToOrigin *) message;
2951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2952 "MESH: of type %u\n",
2953 ntohs (msg[1].header.type));
2954 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2958 /* TODO notify that we dont know this tunnel (whom)? */
2959 GNUNET_break_op (0);
2963 if (t->id.oid == myid)
2966 struct GNUNET_MESH_ToOrigin *copy;
2968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2969 "MESH: it's for us! sending to clients...\n");
2970 if (NULL == t->client)
2972 /* got data packet for ownerless tunnel */
2973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2974 "MESH: no clients!\n");
2975 GNUNET_break_op (0);
2978 /* TODO signature verification */
2979 memcpy (cbuf, message, size);
2980 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2981 copy->tid = htonl (t->local_tid);
2982 GNUNET_SERVER_notification_context_unicast (nc,
2988 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2989 "MESH: not for us, retransmitting...\n");
2991 peer_info = peer_info_get (&msg->oid);
2992 if (NULL == peer_info)
2994 /* unknown origin of tunnel */
2998 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2999 send_message (message, &id);
3006 * Core handler for path ACKs
3008 * @param cls closure
3009 * @param message message
3010 * @param peer peer identity this notification is about
3011 * @param atsi performance data
3012 * @param atsi_count number of records in 'atsi'
3014 * @return GNUNET_OK to keep the connection open,
3015 * GNUNET_SYSERR to close it (signal serious error)
3018 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3019 const struct GNUNET_MessageHeader *message,
3020 const struct GNUNET_ATS_Information *atsi,
3021 unsigned int atsi_count)
3023 struct GNUNET_MESH_PathACK *msg;
3024 struct GNUNET_PeerIdentity id;
3025 struct MeshTunnelTreeNode *n;
3026 struct MeshPeerInfo *peer_info;
3027 struct MeshTunnel *t;
3029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3030 "MESH: Received a path ACK msg [%s]\n",
3031 GNUNET_i2s(&my_full_id));
3032 msg = (struct GNUNET_MESH_PathACK *) message;
3033 t = tunnel_get (&msg->oid, msg->tid);
3036 /* TODO notify that we don't know the tunnel */
3040 /* Message for us? */
3041 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
3044 if (NULL == t->client)
3046 GNUNET_break_op (0);
3049 if (NULL != t->dht_get_type)
3051 GNUNET_DHT_get_stop (t->dht_get_type);
3052 t->dht_get_type = NULL;
3054 peer_info = peer_info_get (&msg->peer_id);
3055 n = tree_find_peer(t->tree->root, peer_info->id);
3058 GNUNET_break_op (0);
3061 n->status = MESH_PEER_READY;
3062 send_client_peer_connected(t, peer_info->id);
3066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3067 "MESH: not for us, retransmitting...\n");
3068 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
3069 peer_info = peer_info_get (&msg->oid);
3070 if (NULL == peer_info)
3072 /* If we know the tunnel, we should DEFINITELY know the peer */
3076 send_message (message, &id);
3082 * Functions to handle messages from core
3084 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3085 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3086 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3087 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3088 sizeof (struct GNUNET_MESH_PathBroken)},
3089 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3090 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3091 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3092 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3093 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3094 sizeof (struct GNUNET_MESH_PathACK)},
3100 /******************************************************************************/
3101 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3102 /******************************************************************************/
3105 * deregister_app: iterator for removing each application registered by a client
3107 * @param cls closure
3108 * @param key the hash of the application id (used to access the hashmap)
3109 * @param value the value stored at the key (client)
3111 * @return GNUNET_OK on success
3114 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3116 GNUNET_break (GNUNET_YES ==
3117 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3123 * notify_client_connection_failure: notify a client that the connection to the
3124 * requested remote peer is not possible (for instance, no route found)
3125 * Function called when the socket is ready to queue more data. "buf" will be
3126 * NULL and "size" zero if the socket was closed for writing in the meantime.
3128 * @param cls closure
3129 * @param size number of bytes available in buf
3130 * @param buf where the callee should write the message
3131 * @return number of bytes written to buf
3134 notify_client_connection_failure (void *cls, size_t size, void *buf)
3137 struct MeshPeerInfo *peer_info;
3138 struct GNUNET_MESH_PeerControl *msg;
3139 struct GNUNET_PeerIdentity id;
3141 if (0 == size && NULL == buf)
3143 // TODO retry? cancel?
3147 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3148 peer_info = (struct MeshPeerInfo *) cls;
3149 msg = (struct GNUNET_MESH_PeerControl *) buf;
3150 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3151 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3152 // msg->tunnel_id = htonl(peer_info->t->tid);
3153 GNUNET_PEER_resolve (peer_info->id, &id);
3154 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3162 * Send keepalive packets for a peer
3164 * @param cls Closure (tunnel for which to send the keepalive).
3165 * @param tc Notification context.
3167 * TODO: implement explicit multicast keepalive?
3170 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3172 struct MeshTunnel *t = cls;
3173 struct GNUNET_MessageHeader *payload;
3174 struct GNUNET_MESH_Multicast *msg;
3175 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3176 sizeof(struct GNUNET_MessageHeader);
3179 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3183 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3186 "MESH: sending keepalive for tunnel %d\n",
3189 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3190 msg->header.size = htons (size);
3191 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3192 msg->oid = my_full_id;
3193 msg->tid = htonl(t->id.tid);
3194 payload = (struct GNUNET_MessageHeader *) &msg[1];
3195 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3196 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3197 tunnel_send_multicast (t, &msg->header);
3199 t->path_refresh_task =
3200 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3206 * Function to process paths received for a new peer addition. The recorded
3207 * paths form the initial tunnel, which can be optimized later.
3208 * Called on each result obtained for the DHT search.
3210 * @param cls closure
3211 * @param exp when will this value expire
3212 * @param key key of the result
3213 * @param type type of the result
3214 * @param size number of bytes in data
3215 * @param data pointer to the result data
3217 * TODO: re-issue the request after certain time? cancel after X results?
3220 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3221 const GNUNET_HashCode * key,
3222 const struct GNUNET_PeerIdentity *get_path,
3223 unsigned int get_path_length,
3224 const struct GNUNET_PeerIdentity *put_path,
3225 unsigned int put_path_length,
3226 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3228 struct MeshPathInfo *path_info = cls;
3229 struct MeshPeerPath *p;
3230 struct GNUNET_PeerIdentity pi;
3233 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3234 "MESH: Got results from DHT!\n");
3235 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3236 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3239 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3240 // path_info->peer->dhtget = NULL;
3242 p = path_build_from_dht (get_path, get_path_length,
3243 put_path, put_path_length);
3244 path_add_to_peer (path_info->peer, p);
3245 for (i = 0; i < path_info->peer->ntunnels; i++)
3247 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3248 peer_info_connect(path_info->peer, path_info->t);
3250 // GNUNET_free (path_info);
3257 * Function to process paths received for a new peer addition. The recorded
3258 * paths form the initial tunnel, which can be optimized later.
3259 * Called on each result obtained for the DHT search.
3261 * @param cls closure
3262 * @param exp when will this value expire
3263 * @param key key of the result
3264 * @param type type of the result
3265 * @param size number of bytes in data
3266 * @param data pointer to the result data
3269 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3270 const GNUNET_HashCode * key,
3271 const struct GNUNET_PeerIdentity *get_path,
3272 unsigned int get_path_length,
3273 const struct GNUNET_PeerIdentity *put_path,
3274 unsigned int put_path_length,
3275 enum GNUNET_BLOCK_Type type, size_t size,
3278 const struct GNUNET_PeerIdentity *pi = data;
3279 struct MeshTunnel *t = cls;
3280 struct MeshPeerInfo *peer_info;
3281 struct MeshPeerPath *p;
3283 if (size != sizeof (struct GNUNET_PeerIdentity))
3285 GNUNET_break_op (0);
3288 GNUNET_assert (NULL != t->client);
3289 peer_info = peer_info_get (pi);
3290 (void) GNUNET_CONTAINER_multihashmap_put (
3294 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3296 p = path_build_from_dht (get_path, get_path_length,
3297 put_path, put_path_length);
3298 path_add_to_peer (peer_info, p);
3299 tunnel_add_peer(t, peer_info);
3300 peer_info_connect (peer_info, t);
3304 /******************************************************************************/
3305 /********************* MESH LOCAL HANDLES **************************/
3306 /******************************************************************************/
3310 * Handler for client disconnection
3312 * @param cls closure
3313 * @param client identification of the client; NULL
3314 * for the last call when the server is destroyed
3317 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3319 struct MeshClient *c;
3320 struct MeshClient *next;
3322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3331 if (c->handle != client && NULL != client)
3333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3337 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3338 GNUNET_SERVER_client_drop (c->handle);
3339 if (NULL != c->tunnels)
3341 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3342 &tunnel_destroy_iterator,
3344 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3347 /* deregister clients applications */
3348 if (NULL != c->apps)
3350 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3351 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3353 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3354 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3356 GNUNET_SCHEDULER_cancel (announce_applications_task);
3357 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3359 if (NULL != c->types)
3360 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3362 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3374 * Handler for new clients
3376 * @param cls closure
3377 * @param client identification of the client
3378 * @param message the actual message, which includes messages the client wants
3381 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3382 const struct GNUNET_MessageHeader *message)
3384 struct GNUNET_MESH_ClientConnect *cc_msg;
3385 struct MeshClient *c;
3386 GNUNET_MESH_ApplicationType *a;
3393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3394 /* Check data sanity */
3395 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3396 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3397 ntypes = ntohs (cc_msg->types);
3398 napps = ntohs (cc_msg->applications);
3400 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3403 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3407 /* Create new client structure */
3408 c = GNUNET_malloc (sizeof (struct MeshClient));
3410 c->id = next_client_id++;
3412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3414 GNUNET_SERVER_client_keep (client);
3415 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3418 GNUNET_MESH_ApplicationType at;
3421 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3422 for (i = 0; i < napps; i++)
3425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3426 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3427 /* store in clients hashmap */
3428 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3429 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3430 /* store in global hashmap, for announcements */
3431 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3432 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3434 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3435 announce_applications_task =
3436 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3444 t = (uint16_t *) & a[napps];
3445 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3446 for (i = 0; i < ntypes; i++)
3449 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3451 /* store in clients hashmap */
3452 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3453 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3454 /* store in global hashmap */
3455 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3456 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3459 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3460 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3462 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3463 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3464 GNUNET_SERVER_notification_context_add (nc, client);
3466 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3474 * Handler for requests of new tunnels
3476 * @param cls closure
3477 * @param client identification of the client
3478 * @param message the actual message
3481 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3482 const struct GNUNET_MessageHeader *message)
3484 struct GNUNET_MESH_TunnelMessage *t_msg;
3485 struct MeshTunnel *t;
3486 struct MeshClient *c;
3487 GNUNET_HashCode hash;
3489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3491 /* Sanity check for client registration */
3492 if (NULL == (c = client_get (client)))
3495 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3502 /* Message sanity check */
3503 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3506 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3510 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3511 /* Sanity check for tunnel numbering */
3512 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3515 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3518 /* Sanity check for duplicate tunnel IDs */
3519 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3522 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3526 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3527 while (NULL != tunnel_get_by_pi (myid, next_tid))
3528 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3529 t->id.tid = next_tid++;
3531 t->local_tid = ntohl (t_msg->tunnel_id);
3533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3534 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3535 GNUNET_i2s (&my_full_id),
3540 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3542 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3544 GNUNET_CONTAINER_multihashmap_put (
3545 c->tunnels, &hash, t,
3546 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3549 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3553 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3555 GNUNET_CONTAINER_multihashmap_put (
3557 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3560 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3563 t->tree = tree_new (t, myid);
3564 t->tree->refresh = REFRESH_PATH_TIME;
3565 t->tree->root->status = MESH_PEER_READY;
3566 t->tree->me = t->tree->root;
3568 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3574 * Handler for requests of deleting tunnels
3576 * @param cls closure
3577 * @param client identification of the client
3578 * @param message the actual message
3581 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3582 const struct GNUNET_MessageHeader *message)
3584 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3585 struct MeshClient *c;
3586 struct MeshTunnel *t;
3587 MESH_TunnelNumber tid;
3588 GNUNET_HashCode hash;
3590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3591 "MESH: Got a DESTROY TUNNEL from client!\n");
3593 /* Sanity check for client registration */
3594 if (NULL == (c = client_get (client)))
3597 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3600 /* Message sanity check */
3601 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3604 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3610 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3612 /* Retrieve tunnel */
3613 tid = ntohl (tunnel_msg->tunnel_id);
3615 /* Remove from local id hashmap */
3616 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3617 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3618 GNUNET_assert (GNUNET_YES ==
3619 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t));
3622 tunnel_send_destroy (t);
3624 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3630 * Handler for connection requests to new peers
3632 * @param cls closure
3633 * @param client identification of the client
3634 * @param message the actual message (PeerControl)
3637 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3638 const struct GNUNET_MessageHeader *message)
3640 struct GNUNET_MESH_PeerControl *peer_msg;
3641 struct MeshPeerInfo *peer_info;
3642 struct MeshClient *c;
3643 struct MeshTunnel *t;
3644 MESH_TunnelNumber tid;
3646 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3647 /* Sanity check for client registration */
3648 if (NULL == (c = client_get (client)))
3651 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3655 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3656 /* Sanity check for message size */
3657 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3660 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3664 /* Tunnel exists? */
3665 tid = ntohl (peer_msg->tunnel_id);
3666 t = tunnel_get_by_local_id (c, tid);
3670 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3674 /* Does client own tunnel? */
3675 if (t->client->handle != client)
3678 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3681 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3682 GNUNET_i2s(&peer_msg->peer));
3683 peer_info = peer_info_get (&peer_msg->peer);
3685 tunnel_add_peer(t, peer_info);
3686 peer_info_connect(peer_info, t);
3688 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3694 * Handler for disconnection requests of peers in a tunnel
3696 * @param cls closure
3697 * @param client identification of the client
3698 * @param message the actual message (PeerControl)
3701 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3702 const struct GNUNET_MessageHeader *message)
3704 struct GNUNET_MESH_PeerControl *peer_msg;
3705 struct MeshPeerInfo *peer_info;
3706 struct MeshClient *c;
3707 struct MeshTunnel *t;
3708 MESH_TunnelNumber tid;
3710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3711 /* Sanity check for client registration */
3712 if (NULL == (c = client_get (client)))
3715 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3718 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3719 /* Sanity check for message size */
3720 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3723 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3727 /* Tunnel exists? */
3728 tid = ntohl (peer_msg->tunnel_id);
3729 t = tunnel_get_by_local_id (c, tid);
3733 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3736 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3738 /* Does client own tunnel? */
3739 if (t->client->handle != client)
3742 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3747 "MESH: for peer %s\n",
3748 GNUNET_i2s(&peer_msg->peer));
3749 /* Is the peer in the tunnel? */
3750 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3751 &peer_msg->peer.hashPubKey);
3752 if (NULL == peer_info)
3755 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3759 /* Ok, delete peer from tunnel */
3760 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3761 &peer_msg->peer.hashPubKey);
3763 send_destroy_path (t, peer_info->id);
3764 tunnel_delete_peer(t, peer_info->id);
3765 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3771 * Handler for connection requests to new peers by type
3773 * @param cls closure
3774 * @param client identification of the client
3775 * @param message the actual message (ConnectPeerByType)
3778 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3779 const struct GNUNET_MessageHeader *message)
3781 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3782 struct MeshClient *c;
3783 struct MeshTunnel *t;
3784 GNUNET_HashCode hash;
3785 MESH_TunnelNumber tid;
3787 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3788 /* Sanity check for client registration */
3789 if (NULL == (c = client_get (client)))
3792 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3796 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3797 /* Sanity check for message size */
3798 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3799 ntohs (connect_msg->header.size))
3802 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3806 /* Tunnel exists? */
3807 tid = ntohl (connect_msg->tunnel_id);
3808 t = tunnel_get_by_local_id (c, tid);
3812 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3816 /* Does client own tunnel? */
3817 if (t->client->handle != client)
3820 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3824 /* Do WE have the service? */
3825 t->type = ntohl (connect_msg->type);
3826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3827 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3828 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3831 /* Yes! Fast forward, add ourselves to the tunnel and send the
3832 * good news to the client
3834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3835 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3836 peer_info_get (&my_full_id),
3837 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3840 send_client_peer_connected(t, myid);
3841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3842 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3845 /* Ok, lets find a peer offering the service */
3846 if (NULL != t->dht_get_type)
3848 GNUNET_DHT_get_stop (t->dht_get_type);
3850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3851 GNUNET_h2s (&hash));
3853 GNUNET_DHT_get_start (dht_handle,
3854 GNUNET_TIME_UNIT_FOREVER_REL,
3855 GNUNET_BLOCK_TYPE_TEST,
3858 GNUNET_DHT_RO_RECORD_ROUTE |
3859 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3861 &dht_get_type_handler, t);
3863 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3869 * Handler for client traffic directed to one peer
3871 * @param cls closure
3872 * @param client identification of the client
3873 * @param message the actual message
3876 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3877 const struct GNUNET_MessageHeader *message)
3879 struct MeshClient *c;
3880 struct MeshTunnel *t;
3881 struct MeshPeerInfo *pi;
3882 struct GNUNET_MESH_Unicast *data_msg;
3883 MESH_TunnelNumber tid;
3886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3887 "MESH: Got a unicast request from a client!\n");
3889 /* Sanity check for client registration */
3890 if (NULL == (c = client_get (client)))
3893 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3896 data_msg = (struct GNUNET_MESH_Unicast *) message;
3897 /* Sanity check for message size */
3898 size = ntohs (message->size);
3899 if (sizeof (struct GNUNET_MESH_Unicast) +
3900 sizeof (struct GNUNET_MessageHeader) > size)
3903 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3907 /* Tunnel exists? */
3908 tid = ntohl (data_msg->tid);
3909 t = tunnel_get_by_local_id (c, tid);
3913 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3917 /* Is it a local tunnel? Then, does client own the tunnel? */
3918 if (NULL != t->client &&
3919 NULL != t->client->handle &&
3920 t->client->handle != client)
3923 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3927 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3928 &data_msg->destination.hashPubKey);
3929 /* Is the selected peer in the tunnel? */
3933 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3937 /* Ok, everything is correct, send the message
3938 * (pretend we got it from a mesh peer)
3941 char buf[ntohs (message->size)];
3942 struct GNUNET_MESH_Unicast *copy;
3944 /* Work around const limitation */
3945 copy = (struct GNUNET_MESH_Unicast *) buf;
3946 memcpy (buf, data_msg, size);
3947 copy->oid = my_full_id;
3948 copy->tid = htonl (t->id.tid);
3949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3950 "MESH: calling generic handler...\n");
3951 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3953 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3959 * Handler for client traffic directed to the origin
3961 * @param cls closure
3962 * @param client identification of the client
3963 * @param message the actual message
3966 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3967 const struct GNUNET_MessageHeader *message)
3969 struct GNUNET_MESH_ToOrigin *data_msg;
3970 struct GNUNET_PeerIdentity id;
3971 struct MeshClient *c;
3972 struct MeshTunnel *t;
3973 MESH_TunnelNumber tid;
3976 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3977 "MESH: Got a ToOrigin request from a client!\n");
3979 /* Sanity check for client registration */
3980 if (NULL == (c = client_get (client)))
3983 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3986 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3987 /* Sanity check for message size */
3988 size = ntohs (message->size);
3989 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3990 sizeof (struct GNUNET_MessageHeader) > size)
3993 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3997 /* Tunnel exists? */
3998 tid = ntohl (data_msg->tid);
3999 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4002 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4005 t = tunnel_get_by_local_id (c, tid);
4009 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4013 /* It shouldn't be a local tunnel. */
4014 if (NULL != t->client)
4017 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4020 GNUNET_PEER_resolve(t->id.oid, &id);
4022 /* Ok, everything is correct, send the message
4023 * (pretend we got it from a mesh peer)
4026 char buf[ntohs (message->size)];
4027 struct GNUNET_MESH_ToOrigin *copy;
4029 /* Work around const limitation */
4030 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4031 memcpy (buf, data_msg, size);
4033 copy->tid = htonl (t->id.tid);
4034 copy->sender = my_full_id;
4035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4036 "MESH: calling generic handler...\n");
4037 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
4039 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4045 * Handler for client traffic directed to all peers in a tunnel
4047 * @param cls closure
4048 * @param client identification of the client
4049 * @param message the actual message
4052 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
4053 const struct GNUNET_MessageHeader *message)
4055 struct MeshClient *c;
4056 struct MeshTunnel *t;
4057 struct GNUNET_MESH_Multicast *data_msg;
4058 MESH_TunnelNumber tid;
4060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4061 "MESH: Got a multicast request from a client!\n");
4063 /* Sanity check for client registration */
4064 if (NULL == (c = client_get (client)))
4067 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4070 data_msg = (struct GNUNET_MESH_Multicast *) message;
4071 /* Sanity check for message size */
4072 if (sizeof (struct GNUNET_MESH_Multicast) +
4073 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4076 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4080 /* Tunnel exists? */
4081 tid = ntohl (data_msg->tid);
4082 t = tunnel_get_by_local_id (c, tid);
4086 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4090 /* Does client own tunnel? */
4091 if (t->client->handle != client)
4094 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4099 char buf[ntohs(message->size)];
4100 struct GNUNET_MESH_Multicast *copy;
4102 copy = (struct GNUNET_MESH_Multicast *)buf;
4103 memcpy(buf, message, ntohs(message->size));
4104 copy->oid = my_full_id;
4105 copy->tid = htonl(t->id.tid);
4106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4107 "MESH: calling generic handler...\n");
4108 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4111 /* receive done gets called when last copy is sent to a neighbor */
4116 * Functions to handle messages from clients
4118 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4119 {&handle_local_new_client, NULL,
4120 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4121 {&handle_local_tunnel_create, NULL,
4122 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4123 sizeof (struct GNUNET_MESH_TunnelMessage)},
4124 {&handle_local_tunnel_destroy, NULL,
4125 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4126 sizeof (struct GNUNET_MESH_TunnelMessage)},
4127 {&handle_local_connect_add, NULL,
4128 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4129 sizeof (struct GNUNET_MESH_PeerControl)},
4130 {&handle_local_connect_del, NULL,
4131 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4132 sizeof (struct GNUNET_MESH_PeerControl)},
4133 {&handle_local_connect_by_type, NULL,
4134 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4135 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4136 {&handle_local_unicast, NULL,
4137 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4138 {&handle_local_to_origin, NULL,
4139 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4140 {&handle_local_multicast, NULL,
4141 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4147 * To be called on core init/fail.
4149 * @param cls service closure
4150 * @param server handle to the server for this service
4151 * @param identity the public identity of this peer
4154 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4155 const struct GNUNET_PeerIdentity *identity)
4157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4158 core_handle = server;
4159 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4161 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4162 GNUNET_SCHEDULER_shutdown();
4168 * Method called whenever a given peer connects.
4170 * @param cls closure
4171 * @param peer peer identity this notification is about
4172 * @param atsi performance data for the connection
4173 * @param atsi_count number of records in 'atsi'
4176 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4177 const struct GNUNET_ATS_Information *atsi,
4178 unsigned int atsi_count)
4180 struct MeshPeerInfo *peer_info;
4181 struct MeshPeerPath *path;
4183 #if MESH_DEBUG_CONNECTION
4184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4186 GNUNET_i2s(&my_full_id));
4188 peer_info = peer_info_get (peer);
4189 if (myid == peer_info->id)
4191 #if MESH_DEBUG_CONNECTION
4192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4196 #if MESH_DEBUG_CONNECTION
4199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4203 path = path_new (2);
4204 path->peers[0] = myid;
4205 path->peers[1] = peer_info->id;
4206 GNUNET_PEER_change_rc(myid, 1);
4207 GNUNET_PEER_change_rc(peer_info->id, 1);
4208 path_add_to_peer (peer_info, path);
4213 * Method called whenever a peer disconnects.
4215 * @param cls closure
4216 * @param peer peer identity this notification is about
4219 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4221 struct MeshPeerInfo *pi;
4224 #if MESH_DEBUG_CONNECTION
4225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4227 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4233 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4235 /* TODO: notify that the transmission failed */
4236 peer_info_cancel_transmission(pi, i);
4238 path_remove_from_peer (pi, pi->id, myid);
4239 #if MESH_DEBUG_CONNECTION
4242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4249 /******************************************************************************/
4250 /************************ MAIN FUNCTIONS ****************************/
4251 /******************************************************************************/
4254 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4256 * @param cls closure
4257 * @param key current key code
4258 * @param value value in the hash map
4259 * @return GNUNET_YES if we should continue to iterate,
4263 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4265 struct MeshTunnel *t = value;
4271 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4273 * @param cls closure
4274 * @param key current key code
4275 * @param value value in the hash map
4276 * @return GNUNET_YES if we should continue to iterate,
4280 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4282 struct MeshPeerInfo *p = value;
4283 peer_info_destroy (p);
4288 * Task run during shutdown.
4294 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4297 /* TODO: destroy tunnels? */
4298 if (core_handle != NULL)
4300 GNUNET_CORE_disconnect (core_handle);
4303 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4304 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4305 if (dht_handle != NULL)
4307 GNUNET_DHT_disconnect (dht_handle);
4312 GNUNET_SERVER_notification_context_destroy (nc);
4315 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4317 GNUNET_SCHEDULER_cancel (announce_id_task);
4318 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4324 * Process mesh requests.
4326 * @param cls closure
4327 * @param server the initialized server
4328 * @param c configuration to use
4331 run (void *cls, struct GNUNET_SERVER_Handle *server,
4332 const struct GNUNET_CONFIGURATION_Handle *c)
4334 struct MeshPeerInfo *peer;
4335 struct MeshPeerPath *p;
4338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4339 server_handle = server;
4340 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4341 CORE_QUEUE_SIZE, /* queue size */
4342 NULL, /* Closure passed to MESH functions */
4343 &core_init, /* Call core_init once connected */
4344 &core_connect, /* Handle connects */
4345 &core_disconnect, /* remove peers on disconnects */
4346 NULL, /* Don't notify about all incoming messages */
4347 GNUNET_NO, /* For header only in notification */
4348 NULL, /* Don't notify about all outbound messages */
4349 GNUNET_NO, /* For header-only out notification */
4350 core_handlers); /* Register these handlers */
4352 if (core_handle == NULL)
4355 GNUNET_SCHEDULER_shutdown ();
4360 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4363 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4365 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4366 GNUNET_SCHEDULER_shutdown ();
4369 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4370 GNUNET_free (keyfile);
4371 if (my_private_key == NULL)
4373 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4374 _("Mesh service could not access hostkey. Exiting.\n"));
4375 GNUNET_SCHEDULER_shutdown ();
4378 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4379 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4380 &my_full_id.hashPubKey);
4381 myid = GNUNET_PEER_intern (&my_full_id);
4383 // // transport_handle = GNUNET_TRANSPORT_connect(c,
4390 dht_handle = GNUNET_DHT_connect (c, 64);
4391 if (dht_handle == NULL)
4397 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4399 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4400 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4401 peers = GNUNET_CONTAINER_multihashmap_create (32);
4402 applications = GNUNET_CONTAINER_multihashmap_create (32);
4403 types = GNUNET_CONTAINER_multihashmap_create (32);
4405 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4406 nc = GNUNET_SERVER_notification_context_create (server_handle,
4408 GNUNET_SERVER_disconnect_notify (server_handle,
4409 &handle_local_client_disconnect,
4414 clients_tail = NULL;
4419 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4420 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4422 /* Create a peer_info for the local peer */
4423 peer = peer_info_get(&my_full_id);
4426 path_add_to_peer(peer, p);
4428 /* Scheduled the task to clean up when shutdown is called */
4429 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4436 * The main function for the mesh service.
4438 * @param argc number of arguments from the command line
4439 * @param argv command line arguments
4440 * @return 0 ok, 1 on error
4443 main (int argc, char *const *argv)
4447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4450 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4452 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");