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
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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;
450 static struct GNUNET_DHT_Handle *dht_handle;
455 static struct GNUNET_SERVER_Handle *server_handle;
458 * Notification context, to send messages to local clients
460 static struct GNUNET_SERVER_NotificationContext *nc;
463 * Local peer own ID (memory efficient handle)
465 static GNUNET_PEER_Id myid;
468 * Local peer own ID (full value)
470 static struct GNUNET_PeerIdentity my_full_id;
475 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
480 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
483 * Tunnel ID for the next created tunnel (global tunnel number)
485 static MESH_TunnelNumber next_tid;
488 * Tunnel ID for the next incoming tunnel (local tunnel number)
490 static MESH_TunnelNumber next_local_tid;
493 * All application types provided by this peer
495 static struct GNUNET_CONTAINER_MultiHashMap *applications;
498 * All message types clients of this peer are interested in
500 static struct GNUNET_CONTAINER_MultiHashMap *types;
503 * Task to periodically announce provided applications
505 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
508 * Task to periodically announce itself in the network
510 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
513 unsigned int next_client_id;
517 /******************************************************************************/
518 /************************ ITERATORS ****************************/
519 /******************************************************************************/
521 /* FIXME move iterators here */
524 /******************************************************************************/
525 /************************ PERIODIC FUNCTIONS ****************************/
526 /******************************************************************************/
529 * Announce iterator over for each application provided by the peer
532 * @param key current key code
533 * @param value value in the hash map
534 * @return GNUNET_YES if we should continue to
539 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
541 /* FIXME are hashes in multihash map equal on all aquitectures? */
542 GNUNET_DHT_put (dht_handle,
545 GNUNET_DHT_RO_RECORD_ROUTE |
546 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
547 GNUNET_BLOCK_TYPE_TEST,
548 sizeof (struct GNUNET_PeerIdentity),
549 (const char *) &my_full_id,
551 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
552 &mesh_debug, "DHT_put for app completed");
554 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
556 APP_ANNOUNCE_TIME, NULL, NULL);
563 * Periodically announce what applications are provided by local clients
566 * @param tc task context
569 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
571 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
573 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
577 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
579 announce_applications_task =
580 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
588 * Periodically announce self id in the DHT
591 * @param tc task context
594 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
596 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
598 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
602 * - Set data expiration in function of X
605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
606 GNUNET_i2s (&my_full_id));
607 GNUNET_DHT_put (dht_handle, /* DHT handle */
608 &my_full_id.hashPubKey, /* Key to use */
609 10U, /* Replication level */
610 GNUNET_DHT_RO_RECORD_ROUTE |
611 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
612 GNUNET_BLOCK_TYPE_TEST, /* Block type */
613 sizeof(my_full_id), /* Size of the data */
614 (char *)&my_full_id, /* Data itself */
615 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
616 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
618 &mesh_debug, "DHT_put for id completed");
620 NULL, /* Continuation */
621 NULL); /* Continuation closure */
624 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
629 * Function to process paths received for a new peer addition. The recorded
630 * paths form the initial tunnel, which can be optimized later.
631 * Called on each result obtained for the DHT search.
634 * @param exp when will this value expire
635 * @param key key of the result
636 * @param type type of the result
637 * @param size number of bytes in data
638 * @param data pointer to the result data
641 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
642 const GNUNET_HashCode * key,
643 const struct GNUNET_PeerIdentity *get_path,
644 unsigned int get_path_length,
645 const struct GNUNET_PeerIdentity *put_path,
646 unsigned int put_path_length,
647 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
650 /******************************************************************************/
651 /****************** GENERAL HELPER FUNCTIONS ************************/
652 /******************************************************************************/
655 * Check if client has registered with the service and has not disconnected
657 * @param client the client to check
659 * @return non-NULL if client exists in the global DLL
661 static struct MeshClient *
662 client_get (struct GNUNET_SERVER_Client *client)
664 struct MeshClient *c;
669 if (c->handle == client)
678 * Checks if a given client has subscribed to certain message type
680 * @param message_type Type of message to check
681 * @param c Client to check
683 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
688 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
692 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
693 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
698 * Allow a client to send more data after transmitting a multicast message
699 * which some neighbor has not yet accepted altough a reasonable time has
702 * @param cls Closure (DataDescriptor containing the task identifier)
703 * @param tc Task Context
706 client_allow_send(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
708 struct MeshDataDescriptor *info = cls;
710 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
714 "MESH: CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
717 *(info->timeout_task) = GNUNET_SCHEDULER_NO_TASK;
718 GNUNET_SERVER_receive_done(info->client, GNUNET_OK);
723 * Search for a tunnel by global ID using full PeerIdentities
725 * @param oid owner of the tunnel
726 * @param tid global tunnel number
728 * @return tunnel handler, NULL if doesn't exist
730 static struct MeshTunnel *
731 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
735 * Notify a tunnel that a connection has broken that affects at least
738 * @param t Tunnel affected.
739 * @param p1 Peer that got disconnected from p2.
740 * @param p2 Peer that got disconnected from p1.
742 * @return Short ID of the peer disconnected (either p1 or p2).
743 * 0 if the tunnel remained unaffected.
745 static GNUNET_PEER_Id
746 tunnel_notify_connection_broken (struct MeshTunnel *t,
752 * Send the message to all clients that have subscribed to its type
754 * @param msg Pointer to the message itself
755 * @return number of clients this message was sent to
758 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
759 const struct GNUNET_MessageHeader *payload)
761 struct GNUNET_PeerIdentity *oid;
762 struct MeshClient *c;
763 struct MeshTunnel *t;
764 MESH_TunnelNumber *tid;
767 char cbuf[htons(msg->size)];
769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Sending to clients...\n");
770 type = ntohs (payload->type);
771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message of type %u\n", type);
773 memcpy (cbuf, msg, sizeof(cbuf));
774 switch (htons(msg->type))
776 struct GNUNET_MESH_Unicast *uc;
777 struct GNUNET_MESH_Multicast *mc;
778 struct GNUNET_MESH_ToOrigin *to;
780 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
781 uc = (struct GNUNET_MESH_Unicast *) cbuf;
785 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
786 mc = (struct GNUNET_MESH_Multicast *) cbuf;
790 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
791 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
799 t = tunnel_get (oid, ntohl(*tid));
805 *tid = htonl (t->local_tid);
806 for (count = 0, c = clients; c != NULL; c = c->next)
808 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client %u\n", c->id);
809 if (client_is_subscribed (type, c))
812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending\n");
813 GNUNET_SERVER_notification_context_unicast (
816 (struct GNUNET_MessageHeader *) cbuf,
825 * Notify the client that owns the tunnel that a peer has connected to it
826 * (the requested path to it has been confirmed).
828 * @param t Tunnel whose owner to notify
829 * @param id Short id of the peer that has connected
832 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
834 struct GNUNET_MESH_PeerControl pc;
836 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
837 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
838 pc.tunnel_id = htonl (t->local_tid);
839 GNUNET_PEER_resolve (id, &pc.peer);
840 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
841 &pc.header, GNUNET_NO);
846 * Notify all clients (not depending on registration status) that the incoming
847 * tunnel is no longer valid.
849 * @param t Tunnel that was destroyed.
852 send_clients_tunnel_destroy (struct MeshTunnel *t)
854 struct GNUNET_MESH_TunnelMessage msg;
856 msg.header.size = htons (sizeof (msg));
857 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
858 msg.tunnel_id = htonl (t->local_tid);
859 GNUNET_SERVER_notification_context_broadcast(nc, &msg.header, GNUNET_NO);
864 * Function called to notify a client about the socket
865 * being ready to queue more data. "buf" will be
866 * NULL and "size" zero if the socket was closed for
867 * writing in the meantime.
870 * @param size number of bytes available in buf
871 * @param buf where the callee should write the message
872 * @return number of bytes written to buf
875 send_core_create_path (void *cls, size_t size, void *buf);
879 * Function called to notify a client about the socket
880 * being ready to queue more data. "buf" will be
881 * NULL and "size" zero if the socket was closed for
882 * writing in the meantime.
884 * @param cls closure (data itself)
885 * @param size number of bytes available in buf
886 * @param buf where the callee should write the message
888 * @return number of bytes written to buf
891 send_core_data_multicast (void *cls, size_t size, void *buf);
895 * Decrements the reference counter and frees all resources if needed
897 * @param dd Data Descriptor used in a multicast message
900 data_descriptor_decrement_multicast (struct MeshDataDescriptor *dd)
902 if (0 == --(*(dd->copies)))
904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
905 if (NULL != dd->client)
907 if (GNUNET_SCHEDULER_NO_TASK != *(dd->timeout_task))
909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
910 "MESH: cancelling client timeout (%u)...\n",
911 *(dd->timeout_task));
912 GNUNET_SCHEDULER_cancel(*(dd->timeout_task));
913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
914 GNUNET_SERVER_receive_done (dd->client, GNUNET_OK);
916 GNUNET_free (dd->timeout_task);
918 GNUNET_free (dd->copies);
919 GNUNET_free (dd->data);
925 * Cancel a core transmission that was already requested and free all resources
926 * associated to the request.
928 * @param peer PeeInfo of the peer whose transmission is cancelled.
929 * @param i Position of the transmission to be cancelled.
932 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
934 if (NULL != peer->core_transmit[i])
936 struct MeshDataDescriptor *dd;
937 struct MeshPathInfo *path_info;
941 struct GNUNET_PeerIdentity id;
943 GNUNET_PEER_resolve (peer->id, &id);
944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
945 "MESH: Cancelling data transmission at %s [%u]\n",
948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
949 "MESH: message type %u\n",
953 /* TODO: notify that tranmission has failed */
954 switch (peer->types[i])
956 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
957 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
958 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
959 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
961 data_descriptor_decrement_multicast (dd);
963 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
965 path_info = peer->infos[i];
966 path_destroy(path_info->path);
970 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
972 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
973 peer->core_transmit[i] = NULL;
974 GNUNET_free (peer->infos[i]);
980 * Get a unused CORE slot to transmit a message to a peer. If all the slots
981 * are used, cancel one and return it's position.
983 * @param peer PeerInfo of the neighbor we want to transmit to.
985 * @return The index of an available slot to transmit to the neighbor.
988 peer_info_transmit_slot (struct MeshPeerInfo *peer)
992 for (i = 0; peer->core_transmit[i]; i++)
994 if (i == (CORE_QUEUE_SIZE - 1))
996 /* All positions are taken! Overwriting! */
998 peer_info_cancel_transmission(peer, 0);
1007 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1008 * and insert it in the appropiate structures if the peer is not known yet.
1010 * @param peer Full identity of the peer.
1012 * @return Existing or newly created peer info.
1014 static struct MeshPeerInfo *
1015 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1017 struct MeshPeerInfo *peer_info;
1019 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1020 if (NULL == peer_info)
1023 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1024 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1025 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1026 peer_info->id = GNUNET_PEER_intern (peer);
1034 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1035 * and insert it in the appropiate structures if the peer is not known yet.
1037 * @param peer Short identity of the peer.
1039 * @return Existing or newly created peer info.
1041 static struct MeshPeerInfo *
1042 peer_info_get_short (const GNUNET_PEER_Id peer)
1044 struct GNUNET_PeerIdentity id;
1046 GNUNET_PEER_resolve(peer, &id);
1047 return peer_info_get(&id);
1052 * Iterator to remove the tunnel from the list of tunnels a peer participates
1055 * @param cls Closure (tunnel info)
1056 * @param key GNUNET_PeerIdentity of the peer (unused)
1057 * @param value PeerInfo of the peer
1059 * @return always GNUNET_YES, to keep iterating
1062 peer_info_delete_tunnel (void* cls, const GNUNET_HashCode* key, void* value)
1064 struct MeshTunnel *t = cls;
1065 struct MeshPeerInfo *peer = value;
1068 for (i = 0; i < peer->ntunnels; i++)
1070 if (0 == memcmp(&peer->tunnels[i]->id,
1072 sizeof(struct MESH_TunnelID)))
1075 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1076 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1085 * Core callback to write a
1087 * @param cls Closure (MeshDataDescriptor with data in "data" member).
1088 * @param size Number of bytes available in buf.
1089 * @param buf Where the to write the message.
1091 * @return number of bytes written to buf
1094 send_core_data_raw (void *cls, size_t size, void *buf)
1096 struct MeshDataDescriptor *info = cls;
1097 struct GNUNET_MessageHeader *msg;
1100 GNUNET_assert (NULL != info);
1101 GNUNET_assert (NULL != info->data);
1102 msg = (struct GNUNET_MessageHeader *) info->data;
1103 total_size = ntohs (msg->size);
1105 if (total_size > size)
1107 struct GNUNET_PeerIdentity id;
1109 GNUNET_PEER_resolve (info->peer->id, &id);
1110 info->peer->core_transmit[info->handler_n] =
1111 GNUNET_CORE_notify_transmit_ready(core_handle,
1114 GNUNET_TIME_UNIT_FOREVER_REL,
1117 &send_core_data_raw,
1121 info->peer->core_transmit[info->handler_n] = NULL;
1122 memcpy (buf, msg, total_size);
1123 GNUNET_free (info->data);
1130 * Sends an already built message to a peer, properly registrating
1131 * all used resources.
1133 * @param message Message to send.
1134 * @param peer Short ID of the neighbor whom to send the message.
1137 send_message (const struct GNUNET_MessageHeader *message,
1138 const struct GNUNET_PeerIdentity *peer)
1140 struct MeshDataDescriptor *info;
1141 struct MeshPeerInfo *neighbor;
1145 size = ntohs (message->size);
1146 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1147 info->data = GNUNET_malloc (size);
1148 memcpy (info->data, message, size);
1149 neighbor = peer_info_get (peer);
1150 i = peer_info_transmit_slot (neighbor);
1151 info->handler_n = i;
1152 info->peer = neighbor;
1153 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1154 neighbor->infos[i] = info;
1155 neighbor->core_transmit[i] =
1156 GNUNET_CORE_notify_transmit_ready(core_handle,
1159 GNUNET_TIME_UNIT_FOREVER_REL,
1162 &send_core_data_raw,
1169 * Sends a CREATE PATH message for a path to a peer, properly registrating
1170 * all used resources.
1172 * @param peer PeerInfo of the final peer for whom this path is being created.
1173 * @param p Path itself.
1174 * @param t Tunnel for which the path is created.
1177 send_create_path (struct MeshPeerInfo *peer,
1178 struct MeshPeerPath *p,
1179 struct MeshTunnel *t)
1181 struct GNUNET_PeerIdentity id;
1182 struct MeshPathInfo *path_info;
1183 struct MeshPeerInfo *neighbor;
1188 p = tree_get_path_to_peer(t->tree, peer->id);
1195 for (i = 0; i < p->length; i++)
1197 if (p->peers[i] == myid)
1200 if (i >= p->length - 1)
1206 GNUNET_PEER_resolve(p->peers[i + 1], &id);
1208 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1209 path_info->path = p;
1211 neighbor = peer_info_get(&id);
1212 path_info->peer = neighbor;
1213 path_info->pos = peer_info_transmit_slot(neighbor);
1214 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1215 neighbor->infos[path_info->pos] = path_info;
1216 neighbor->core_transmit[path_info->pos] =
1217 GNUNET_CORE_notify_transmit_ready (
1218 core_handle, /* handle */
1221 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1223 sizeof (struct GNUNET_MESH_ManipulatePath)
1224 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1225 &send_core_create_path, /* callback */
1226 path_info); /* cls */
1231 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1233 * @param t Tunnel whose path to destroy.
1234 * @param destination Short ID of the peer to whom the path to destroy.
1237 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1239 struct GNUNET_MESH_ManipulatePath *msg;
1240 struct GNUNET_PeerIdentity *pi;
1241 struct MeshPeerPath *p;
1245 p = tree_get_path_to_peer(t->tree, destination);
1251 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1252 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1253 msg = GNUNET_malloc (size);
1254 msg->header.size = htons (size);
1255 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1256 msg->tid = htonl (t->id.tid);
1257 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1258 for (i = 0; i < p->length; i++)
1260 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1262 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1268 * Try to establish a new connection to this peer.
1269 * Use the best path for the given tunnel.
1270 * If the peer doesn't have any path to it yet, try to get one.
1271 * If the peer already has some path, send a CREATE PATH towards it.
1273 * @param peer PeerInfo of the peer.
1274 * @param t Tunnel for which to create the path, if possible.
1277 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1279 struct MeshPeerPath *p;
1280 struct MeshPathInfo *path_info;
1282 if (NULL != peer->path_head)
1284 p = tree_get_path_to_peer(t->tree, peer->id);
1287 send_create_path(peer, p, t);
1292 send_client_peer_connected(t, myid);
1295 else if (NULL == peer->dhtget)
1297 struct GNUNET_PeerIdentity id;
1299 GNUNET_PEER_resolve(peer->id, &id);
1300 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1301 path_info->peer = peer;
1303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1304 "MESH: Starting DHT GET for peer %s\n",
1306 peer->dhtgetcls = path_info;
1308 GNUNET_DHT_get_start(dht_handle, /* handle */
1309 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1310 GNUNET_BLOCK_TYPE_TEST, /* type */
1311 &id.hashPubKey, /* key to search */
1312 4, /* replication level */
1313 GNUNET_DHT_RO_RECORD_ROUTE |
1314 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1316 0, /* xquery bits */
1317 &dht_get_id_handler,
1320 /* Otherwise, there is no path but the DHT get is already started. */
1325 * Destroy the peer_info and free any allocated resources linked to it
1327 * @param pi The peer_info to destroy.
1329 * @return GNUNET_OK on success
1332 peer_info_destroy (struct MeshPeerInfo *pi)
1334 struct GNUNET_PeerIdentity id;
1335 struct MeshPeerPath *p;
1336 struct MeshPeerPath *nextp;
1339 GNUNET_PEER_resolve (pi->id, &id);
1340 GNUNET_PEER_change_rc (pi->id, -1);
1343 GNUNET_CONTAINER_multihashmap_remove (peers,&id.hashPubKey, pi))
1346 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1347 "MESH: removing peer %s, not in hashmap\n",
1350 if (NULL != pi->dhtget)
1352 GNUNET_DHT_get_stop(pi->dhtget);
1353 GNUNET_free (pi->dhtgetcls);
1355 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1357 peer_info_cancel_transmission(pi, i);
1363 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1373 * Remove all paths that rely on a direct connection between p1 and p2
1374 * from the peer itself and notify all tunnels about it.
1376 * @param peer PeerInfo of affected peer.
1377 * @param p1 GNUNET_PEER_Id of one peer.
1378 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1381 * TODO: optimize (see below)
1384 path_remove_from_peer (struct MeshPeerInfo *peer,
1388 struct MeshPeerPath *p;
1389 struct MeshPeerPath *aux;
1390 struct MeshPeerInfo *peer_d;
1392 unsigned int destroyed;
1398 p = peer->path_head;
1402 for (i = 0; i < (p->length - 1); i++)
1404 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1405 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1407 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1418 for (i = 0; i < peer->ntunnels; i++)
1420 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1422 * Problem: one or more peers have been deleted from the tunnel tree.
1423 * We don't know who they are to try to add them again.
1424 * We need to try to find a new path for each of the disconnected peers.
1425 * Some of them might already have a path to reach them that does not
1426 * involve p1 and p2. Adding all anew might render in a better tree than
1427 * the trivial immediate fix.
1429 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1430 * its children will be reachable trough him.
1432 peer_d = peer_info_get_short(d);
1435 for (p = peer_d->path_head; NULL != p; p = p->next)
1437 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1445 /* No callback, as peer will be already disconnected */
1446 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1450 peer_info_connect (peer_d, peer->tunnels[i]);
1457 * Add the path to the peer and update the path used to reach it in case this
1460 * @param peer_info Destination peer to add the path to.
1461 * @param path New path to add. Last peer must be the peer in arg 1.
1462 * Path will be either used of freed if already known.
1464 * TODO: trim the part from origin to us? Add it as path to origin?
1467 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1469 struct MeshPeerPath *aux;
1473 if (NULL == peer_info || NULL == path)
1479 l = path_get_length (path);
1486 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1488 l2 = path_get_length (aux);
1491 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1492 peer_info->path_tail, aux, path);
1496 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1503 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1504 peer_info->path_tail,
1511 * Add the path to the origin peer and update the path used to reach it in case
1512 * this is the shortest.
1513 * The path is given in peer_info -> destination, therefore we turn the path
1514 * upside down first.
1516 * @param peer_info Peer to add the path to, being the origin of the path.
1517 * @param path New path to add after being inversed.
1520 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1523 path_add_to_peer (peer_info, path);
1528 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1529 * to obtain a local peer -> destination path and interning the peer ids.
1531 * @return Newly allocated and created path
1533 static struct MeshPeerPath *
1534 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1535 unsigned int get_path_length,
1536 const struct GNUNET_PeerIdentity *put_path,
1537 unsigned int put_path_length)
1539 struct MeshPeerPath *p;
1545 GNUNET_PEER_change_rc(myid, 1);
1546 i = get_path_length;
1547 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1548 for (i--; i >= 0; i--)
1550 id = GNUNET_PEER_intern (&get_path[i]);
1551 if (p->length > 0 && id == p->peers[p->length - 1])
1553 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1554 GNUNET_PEER_change_rc(id, -1);
1558 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1559 "MESH: Adding from GET: %s.\n",
1560 GNUNET_i2s(&get_path[i]));
1562 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1563 p->peers[p->length - 1] = id;
1566 i = put_path_length;
1567 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1568 for (i--; i >= 0; i--)
1570 id = GNUNET_PEER_intern (&put_path[i]);
1573 /* PUT path went through us, so discard the path up until now and start
1574 * from here to get a much shorter (and loop-free) path.
1579 if (p->length > 0 && id == p->peers[p->length - 1])
1581 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1582 GNUNET_PEER_change_rc(id, -1);
1586 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1587 "MESH: Adding from PUT: %s.\n",
1588 GNUNET_i2s(&put_path[i]));
1590 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1591 p->peers[p->length - 1] = id;
1595 if (get_path_length > 0)
1596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1597 "MESH: (first of GET: %s)\n",
1598 GNUNET_i2s(&get_path[0]));
1599 if (put_path_length > 0)
1600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1601 "MESH: (first of PUT: %s)\n",
1602 GNUNET_i2s(&put_path[0]));
1603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1604 "MESH: In total: %d hops\n",
1606 for (i = 0; i < p->length; i++)
1608 struct GNUNET_PeerIdentity peer_id;
1610 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1614 GNUNET_i2s(&peer_id));
1622 * Send keepalive packets for a peer
1624 * @param cls Closure (tunnel for which to send the keepalive).
1625 * @param tc Notification context.
1627 * TODO: implement explicit multicast keepalive?
1630 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1634 * Search for a tunnel among the tunnels for a client
1636 * @param c the client whose tunnels to search in
1637 * @param tid the local id of the tunnel
1639 * @return tunnel handler, NULL if doesn't exist
1641 static struct MeshTunnel *
1642 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1644 GNUNET_HashCode hash;
1646 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1647 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1649 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1651 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1656 * Search for a tunnel by global ID using PEER_ID
1658 * @param pi owner of the tunnel
1659 * @param tid global tunnel number
1661 * @return tunnel handler, NULL if doesn't exist
1663 static struct MeshTunnel *
1664 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1666 struct MESH_TunnelID id;
1667 GNUNET_HashCode hash;
1672 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1673 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1678 * Search for a tunnel by global ID using full PeerIdentities
1680 * @param oid owner of the tunnel
1681 * @param tid global tunnel number
1683 * @return tunnel handler, NULL if doesn't exist
1685 static struct MeshTunnel *
1686 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1688 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1693 * Callback used to notify a client owner of a tunnel that a peer has
1694 * disconnected, most likely because of a path change.
1696 * @param n Node in the tree representing the disconnected peer
1698 * FIXME: pass tunnel via cls, make param just a peer identity
1701 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1703 struct MeshPeerInfo *peer;
1705 if (NULL != n->t->client && NULL != nc)
1707 struct GNUNET_MESH_PeerControl msg;
1708 msg.header.size = htons (sizeof (msg));
1709 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1710 msg.tunnel_id = htonl (n->t->local_tid);
1711 GNUNET_PEER_resolve (n->peer, &msg.peer);
1712 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1713 &msg.header, GNUNET_NO);
1715 peer = peer_info_get_short(n->peer);
1716 peer_info_connect(peer, n->t);
1721 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1722 * needed rescources.
1723 * If peer already exists, reevaluate shortest path and change if different.
1725 * @param t Tunnel we want to add a new peer to
1726 * @param peer PeerInfo of the peer being added
1730 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1732 struct GNUNET_PeerIdentity id;
1733 struct MeshPeerPath *best_p;
1734 struct MeshPeerPath *p;
1735 unsigned int best_cost;
1738 GNUNET_PEER_resolve(peer->id, &id);
1740 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1743 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1744 GNUNET_CONTAINER_multihashmap_put(
1748 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1751 if (NULL != (p = peer->path_head))
1754 best_cost = path_get_cost(t->tree, p);
1757 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1764 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1765 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1766 t->path_refresh_task =
1767 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1771 /* Start a DHT get if necessary */
1772 peer_info_connect(peer, t);
1777 * Add a path to a tunnel which we don't own, just to remember the next hop.
1778 * If destination node was already in the tunnel, the first hop information
1779 * will be replaced with the new path.
1781 * @param t Tunnel we want to add a new peer to
1782 * @param p Path to add
1783 * @param own_pos Position of local node in path.
1787 tunnel_add_path (struct MeshTunnel *t,
1788 struct MeshPeerPath *p,
1789 unsigned int own_pos)
1791 struct GNUNET_PeerIdentity id;
1793 GNUNET_assert (0 != own_pos);
1794 tree_add_path(t->tree, p, NULL);
1795 if (NULL == t->tree->me)
1796 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1797 if (own_pos < p->length - 1)
1799 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1800 tree_update_first_hops(t->tree, t->tree->me, &id);
1806 * Notifies a tunnel that a connection has broken that affects at least
1807 * some of its peers. Sends a notification towards the root of the tree.
1808 * In case the peer is the owner of the tree, notifies the client that owns
1809 * the tunnel and tries to reconnect.
1811 * @param t Tunnel affected.
1812 * @param p1 Peer that got disconnected from p2.
1813 * @param p2 Peer that got disconnected from p1.
1815 * @return Short ID of the peer disconnected (either p1 or p2).
1816 * 0 if the tunnel remained unaffected.
1818 static GNUNET_PEER_Id
1819 tunnel_notify_connection_broken (struct MeshTunnel *t,
1825 pid = tree_notify_connection_broken (t->tree,
1828 ¬ify_peer_disconnected);
1829 if (myid != p1 && myid != p2)
1835 if (NULL != t->tree->me->parent)
1837 /* We are the peer still connected, notify owner of the disconnection. */
1838 struct GNUNET_MESH_PathBroken msg;
1839 struct GNUNET_PeerIdentity neighbor;
1841 msg.header.size = htons (sizeof (msg));
1842 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1843 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1844 msg.tid = htonl (t->id.tid);
1845 msg.peer1 = my_full_id;
1846 GNUNET_PEER_resolve (pid, &msg.peer2);
1847 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1848 send_message (&msg.header, &neighbor);
1856 * Send a message in a tunnel in multicast, sending a copy to each child node
1857 * down the local one in the tunnel tree.
1859 * @param t Tunnel in which to send the data.
1860 * @param msg Message to be sent
1862 * @return Number of copies sent.
1864 * TODO: unifiy shared resources and reference counter management
1867 tunnel_send_multicast (struct MeshTunnel *t,
1868 const struct GNUNET_MessageHeader *msg)
1870 struct GNUNET_PeerIdentity neighbor;
1871 struct MeshDataDescriptor *info;
1872 struct MeshTunnelTreeNode *n;
1873 struct MeshTunnelTreeNode *counter;
1874 GNUNET_SCHEDULER_TaskIdentifier *task;
1875 unsigned int *copies;
1880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1881 "MESH: sending a multicast packet...\n");
1882 size = ntohs (msg->size);
1883 GNUNET_assert (NULL != t->tree->me);
1884 n = t->tree->me->children_head;
1887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1888 "MESH: no children in the tree, no one to send.\n");
1891 copies = GNUNET_malloc (sizeof (unsigned int));
1892 for (counter = n; NULL != counter; counter = counter->next)
1894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1895 data = GNUNET_malloc (size);
1896 memcpy (data, msg, size);
1897 if (NULL != t->client)
1899 task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
1900 *task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1905 task = NULL; // So GCC shuts up about task being potentially uninitialized
1908 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1911 info->copies = copies;
1912 if (NULL != t->client)
1914 info->client = t->client->handle;
1915 info->timeout_task = task;
1917 info->destination = n->peer;
1918 GNUNET_PEER_resolve (n->peer, &neighbor);
1919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1920 "MESH: sending to %s...\n",
1921 GNUNET_i2s (&neighbor));
1922 info->peer = peer_info_get(&neighbor);
1923 GNUNET_assert (NULL != info->peer);
1924 i = peer_info_transmit_slot(info->peer);
1925 info->handler_n = i;
1926 info->peer->infos[i] = info;
1927 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1928 info->peer->core_transmit[i] =
1929 GNUNET_CORE_notify_transmit_ready (core_handle,
1932 GNUNET_TIME_UNIT_FOREVER_REL,
1935 &send_core_data_multicast, info);
1943 * Send a message to all peers in this tunnel that the tunnel is no longer
1946 * @param t The tunnel whose peers to notify.
1949 tunnel_send_destroy (struct MeshTunnel *t)
1951 struct GNUNET_MESH_TunnelDestroy msg;
1953 msg.header.size = htons (sizeof (msg));
1954 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
1955 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1956 msg.tid = htonl (t->id.tid);
1957 tunnel_send_multicast (t, &msg.header);
1963 * Destroy the tunnel and free any allocated resources linked to it
1965 * @param t the tunnel to destroy
1967 * @return GNUNET_OK on success
1970 tunnel_destroy (struct MeshTunnel *t)
1972 struct MeshClient *c;
1973 struct MeshQueue *q;
1974 struct MeshQueue *qn;
1975 GNUNET_HashCode hash;
1984 struct GNUNET_PeerIdentity id;
1986 GNUNET_PEER_resolve(t->id.oid, &id);
1987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1988 "MESH: destroying tunnel %s [%x]\n",
1992 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1996 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1997 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2002 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2004 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2008 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2010 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2011 GNUNET_break (GNUNET_YES ==
2012 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2015 if (NULL != t->peers)
2017 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2018 &peer_info_delete_tunnel, t);
2019 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2024 if (NULL != q->data)
2025 GNUNET_free (q->data);
2029 /* TODO cancel core transmit ready in case it was active */
2031 tree_destroy(t->tree);
2032 if (NULL != t->dht_get_type)
2033 GNUNET_DHT_get_stop(t->dht_get_type);
2034 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2035 GNUNET_SCHEDULER_cancel(t->timeout_task);
2036 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2037 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2044 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2045 * that are no longer needed, as well as nodes of no longer reachable peers.
2046 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2048 * @param t Tunnel from which to remove the path.
2049 * @param p Peer which should be removed.
2052 tunnel_delete_peer (struct MeshTunnel *t,
2053 GNUNET_PEER_Id peer)
2055 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2056 if (NULL == t->tree->root)
2062 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2063 * client when the client disconnects.
2065 * @param cls closure (client that is disconnecting)
2066 * @param key the hash of the local tunnel id (used to access the hashmap)
2067 * @param value the value stored at the key (tunnel to destroy)
2069 * @return GNUNET_OK on success
2072 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2074 struct MeshTunnel *t = value;
2077 if (NULL != t->dht_get_type)
2079 GNUNET_DHT_get_stop (t->dht_get_type);
2081 r = tunnel_destroy (t);
2087 * Timeout function, destroys tunnel if called
2089 * @param cls Closure (tunnel to destroy).
2090 * @param tc TaskContext
2093 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2095 struct MeshTunnel *t = cls;
2097 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2099 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2104 * Resets the tunnel timeout. Starts it if no timeout was running.
2106 * @param t Tunnel whose timeout to reset.
2109 tunnel_reset_timeout (struct MeshTunnel *t)
2111 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2112 GNUNET_SCHEDULER_cancel (t->timeout_task);
2113 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2114 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2120 /******************************************************************************/
2121 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2122 /******************************************************************************/
2125 * Function called to notify a client about the socket
2126 * being ready to queue more data. "buf" will be
2127 * NULL and "size" zero if the socket was closed for
2128 * writing in the meantime.
2130 * @param cls closure
2131 * @param size number of bytes available in buf
2132 * @param buf where the callee should write the message
2133 * @return number of bytes written to buf
2136 send_core_create_path (void *cls, size_t size, void *buf)
2138 struct MeshPathInfo *info = cls;
2139 struct GNUNET_MESH_ManipulatePath *msg;
2140 struct GNUNET_PeerIdentity *peer_ptr;
2141 struct MeshPeerInfo *peer = info->peer;
2142 struct MeshTunnel *t = info->t;
2143 struct MeshPeerPath *p = info->path;
2147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2148 "MESH: CREATE PATH sending...\n");
2150 sizeof (struct GNUNET_MESH_ManipulatePath) +
2151 p->length * sizeof (struct GNUNET_PeerIdentity);
2153 if (size < size_needed || NULL == buf)
2155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2159 info->peer->core_transmit[info->pos] =
2160 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2161 GNUNET_TIME_UNIT_FOREVER_REL,
2162 path_get_first_hop (t->tree, peer->id),
2164 &send_core_create_path,
2168 info->peer->core_transmit[info->pos] = NULL;
2171 struct GNUNET_PeerIdentity id;
2173 GNUNET_PEER_resolve (peer->id, &id);
2174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2175 "MESH: setting core_transmit %s [%u] to NULL\n",
2180 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2181 msg->header.size = htons (size_needed);
2182 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2183 msg->tid = ntohl (t->id.tid);
2185 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2186 for (i = 0; i < p->length; i++)
2188 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2195 "MESH: CREATE PATH (%u bytes long) sent!\n",
2202 * Function called to notify a client about the socket
2203 * being ready to queue more data. "buf" will be
2204 * NULL and "size" zero if the socket was closed for
2205 * writing in the meantime.
2207 * @param cls closure (data itself)
2208 * @param size number of bytes available in buf
2209 * @param buf where the callee should write the message
2211 * @return number of bytes written to buf
2214 send_core_data_multicast (void *cls, size_t size, void *buf)
2216 struct MeshDataDescriptor *info = cls;
2219 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2220 GNUNET_assert (NULL != info);
2221 GNUNET_assert (NULL != info->peer);
2222 total_size = info->size;
2223 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2225 if (total_size > size)
2228 struct GNUNET_PeerIdentity id;
2230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2231 "MESH: Multicast: retransmitting... (%u/%u)\n",
2233 GNUNET_PEER_resolve(info->peer->id, &id);
2234 info->peer->core_transmit[info->handler_n] =
2235 GNUNET_CORE_notify_transmit_ready (core_handle,
2238 GNUNET_TIME_UNIT_FOREVER_REL,
2241 &send_core_data_multicast,
2245 info->peer->core_transmit[info->handler_n] = NULL;
2246 info->peer->infos[info->handler_n] = NULL;
2247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2248 memcpy (buf, info->data, total_size);
2251 struct GNUNET_MESH_Multicast *mc;
2252 struct GNUNET_MessageHeader *mh;
2255 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2257 mc = (struct GNUNET_MESH_Multicast *) mh;
2258 mh = (struct GNUNET_MessageHeader *) &mc[1];
2259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2260 "MESH: multicast, payload type %u\n",
2262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2263 "MESH: multicast, payload size %u\n",
2268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2274 data_descriptor_decrement_multicast (info);
2275 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2283 * Function called to notify a client about the socket
2284 * being ready to queue more data. "buf" will be
2285 * NULL and "size" zero if the socket was closed for
2286 * writing in the meantime.
2288 * @param cls closure (MeshDataDescriptor)
2289 * @param size number of bytes available in buf
2290 * @param buf where the callee should write the message
2291 * @return number of bytes written to buf
2294 send_core_path_ack (void *cls, size_t size, void *buf)
2296 struct MeshDataDescriptor *info = cls;
2297 struct GNUNET_MESH_PathACK *msg = buf;
2299 GNUNET_assert (NULL != info);
2302 info->peer->core_transmit[info->handler_n] = NULL;
2304 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2309 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2310 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2311 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2312 msg->tid = htonl (info->origin->tid);
2313 msg->peer_id = my_full_id;
2315 /* TODO add signature */
2317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2318 return sizeof (struct GNUNET_MESH_PathACK);
2322 /******************************************************************************/
2323 /******************** MESH NETWORK HANDLERS **************************/
2324 /******************************************************************************/
2328 * Core handler for path creation
2330 * @param cls closure
2331 * @param message message
2332 * @param peer peer identity this notification is about
2333 * @param atsi performance data
2334 * @param atsi_count number of records in 'atsi'
2336 * @return GNUNET_OK to keep the connection open,
2337 * GNUNET_SYSERR to close it (signal serious error)
2340 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2341 const struct GNUNET_MessageHeader *message,
2342 const struct GNUNET_ATS_Information *atsi,
2343 unsigned int atsi_count)
2345 unsigned int own_pos;
2348 MESH_TunnelNumber tid;
2349 struct GNUNET_MESH_ManipulatePath *msg;
2350 struct GNUNET_PeerIdentity *pi;
2351 GNUNET_HashCode hash;
2352 struct MeshPeerPath *path;
2353 struct MeshPeerInfo *dest_peer_info;
2354 struct MeshPeerInfo *orig_peer_info;
2355 struct MeshTunnel *t;
2357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2358 "MESH: Received a path create msg [%s]\n",
2359 GNUNET_i2s(&my_full_id));
2360 size = ntohs (message->size);
2361 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2363 GNUNET_break_op (0);
2367 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2368 if (size % sizeof (struct GNUNET_PeerIdentity))
2370 GNUNET_break_op (0);
2373 size /= sizeof (struct GNUNET_PeerIdentity);
2376 GNUNET_break_op (0);
2379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2380 "MESH: path has %u hops.\n",
2382 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2384 tid = ntohl (msg->tid);
2385 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2386 t = tunnel_get (pi, tid);
2387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2388 "MESH: path is for tunnel %s [%X].\n",
2393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2394 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2395 t->id.oid = GNUNET_PEER_intern (pi);
2397 t->local_tid = next_local_tid++;
2398 /* FIXME test if taken */
2399 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2400 t->tree = tree_new(t, t->id.oid);
2402 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2404 GNUNET_CONTAINER_multihashmap_put (
2408 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2414 tunnel_reset_timeout (t);
2415 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2417 GNUNET_CONTAINER_multihashmap_put (
2421 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2429 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2430 if (NULL == dest_peer_info)
2432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2433 "MESH: Creating PeerInfo for destination.\n");
2434 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2435 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2436 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2438 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2440 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2441 if (NULL == orig_peer_info)
2443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2444 "MESH: Creating PeerInfo for origin.\n");
2445 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2446 orig_peer_info->id = GNUNET_PEER_intern (pi);
2447 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2448 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2450 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2451 path = path_new (size);
2453 for (i = 0; i < size; i++)
2455 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2456 "MESH: ... adding %s\n",
2457 GNUNET_i2s(&pi[i]));
2458 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2459 if (path->peers[i] == myid)
2462 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2463 "MESH: Own position: %u\n", own_pos);
2466 /* cannot be self, must be 'not found' */
2467 /* create path: self not found in path through self */
2468 GNUNET_break_op (0);
2469 path_destroy (path);
2470 /* FIXME error. destroy tunnel? leave for timeout? */
2473 tunnel_add_path (t, path, own_pos);
2474 if (own_pos == size - 1)
2476 /* It is for us! Send ack. */
2477 struct GNUNET_MESH_TunnelNotification cmsg;
2478 struct MeshDataDescriptor *info;
2481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2482 "MESH: It's for us!\n");
2483 path_add_to_origin (orig_peer_info, path);
2484 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2485 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2487 &my_full_id.hashPubKey,
2488 peer_info_get(&my_full_id),
2489 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2490 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2491 info->origin = &t->id;
2492 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2493 GNUNET_assert (NULL != info->peer);
2494 j = peer_info_transmit_slot(info->peer);
2495 info->handler_n = j;
2496 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2497 info->peer->infos[j] = info;
2498 info->peer->core_transmit[j] =
2499 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2500 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2501 sizeof (struct GNUNET_MESH_PathACK),
2502 &send_core_path_ack, info);
2503 cmsg.header.size = htons(sizeof(cmsg));
2504 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2505 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2506 cmsg.tunnel_id = htonl(t->local_tid);
2507 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2511 struct MeshPeerPath *path2;
2513 /* It's for somebody else! Retransmit. */
2514 path2 = path_duplicate(path);
2515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2516 "MESH: Retransmitting.\n");
2517 path_add_to_peer(dest_peer_info, path);
2518 path = path_duplicate(path2);
2519 path_add_to_origin(orig_peer_info, path2);
2520 send_create_path(dest_peer_info, path, t);
2527 * Core handler for path destruction
2529 * @param cls closure
2530 * @param message message
2531 * @param peer peer identity this notification is about
2532 * @param atsi performance data
2533 * @param atsi_count number of records in 'atsi'
2535 * @return GNUNET_OK to keep the connection open,
2536 * GNUNET_SYSERR to close it (signal serious error)
2539 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2540 const struct GNUNET_MessageHeader *message,
2541 const struct GNUNET_ATS_Information *atsi,
2542 unsigned int atsi_count)
2544 struct GNUNET_MESH_ManipulatePath *msg;
2545 struct GNUNET_PeerIdentity *pi;
2546 struct MeshPeerPath *path;
2547 struct MeshTunnel *t;
2548 unsigned int own_pos;
2552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2553 "MESH: Received a PATH DESTROY msg from %s\n",
2555 size = ntohs (message->size);
2556 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2558 GNUNET_break_op (0);
2562 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2563 if (size % sizeof (struct GNUNET_PeerIdentity))
2565 GNUNET_break_op (0);
2568 size /= sizeof (struct GNUNET_PeerIdentity);
2571 GNUNET_break_op (0);
2574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2575 "MESH: path has %u hops.\n",
2578 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2579 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2581 "MESH: path is for tunnel %s [%X].\n",
2584 t = tunnel_get (pi, ntohl (msg->tid));
2587 /* TODO notify back: we don't know this tunnel */
2588 GNUNET_break_op (0);
2591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2592 path = path_new (size);
2594 for (i = 0; i < size; i++)
2596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2597 "MESH: ... adding %s\n",
2598 GNUNET_i2s(&pi[i]));
2599 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2600 if (path->peers[i] == myid)
2603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2604 "MESH: Own position: %u\n", own_pos);
2605 if (own_pos < path->length - 1)
2606 send_message (message, &pi[own_pos + 1]);
2607 tunnel_delete_peer (t, path->peers[path->length - 1]);
2613 * Core handler for notifications of broken paths
2615 * @param cls closure
2616 * @param message message
2617 * @param peer peer identity this notification is about
2618 * @param atsi performance data
2619 * @param atsi_count number of records in 'atsi'
2621 * @return GNUNET_OK to keep the connection open,
2622 * GNUNET_SYSERR to close it (signal serious error)
2625 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2626 const struct GNUNET_MessageHeader *message,
2627 const struct GNUNET_ATS_Information *atsi,
2628 unsigned int atsi_count)
2630 struct GNUNET_MESH_PathBroken *msg;
2631 struct MeshTunnel *t;
2633 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2634 "MESH: Received a PATH BROKEN msg from %s\n",
2636 msg = (struct GNUNET_MESH_PathBroken *) message;
2637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2638 "MESH: regarding %s\n",
2639 GNUNET_i2s(&msg->peer1));
2640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2641 "MESH: regarding %s\n",
2642 GNUNET_i2s(&msg->peer2));
2643 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2646 GNUNET_break_op (0);
2649 tunnel_notify_connection_broken(t,
2650 GNUNET_PEER_search(&msg->peer1),
2651 GNUNET_PEER_search(&msg->peer2));
2658 * Core handler for tunnel destruction
2660 * @param cls closure
2661 * @param message message
2662 * @param peer peer identity this notification is about
2663 * @param atsi performance data
2664 * @param atsi_count number of records in 'atsi'
2666 * @return GNUNET_OK to keep the connection open,
2667 * GNUNET_SYSERR to close it (signal serious error)
2670 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2671 const struct GNUNET_MessageHeader *message,
2672 const struct GNUNET_ATS_Information *atsi,
2673 unsigned int atsi_count)
2675 struct GNUNET_MESH_TunnelDestroy *msg;
2676 struct MeshTunnel *t;
2678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2679 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2681 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2683 "MESH: for tunnel %s [%u]\n",
2684 GNUNET_i2s (&msg->oid),
2686 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2689 /* Probably already got the message from another path,
2690 * destroyed the tunnel and retransmitted to children.
2695 if (t->id.oid == myid)
2697 GNUNET_break_op (0);
2700 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2702 /* Tunnel was incoming, notify clients */
2703 send_clients_tunnel_destroy (t);
2705 tunnel_send_destroy (t);
2712 * Core handler for mesh network traffic going from the origin to a peer
2714 * @param cls closure
2715 * @param peer peer identity this notification is about
2716 * @param message message
2717 * @param atsi performance data
2718 * @param atsi_count number of records in 'atsi'
2719 * @return GNUNET_OK to keep the connection open,
2720 * GNUNET_SYSERR to close it (signal serious error)
2723 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2724 const struct GNUNET_MessageHeader *message,
2725 const struct GNUNET_ATS_Information *atsi,
2726 unsigned int atsi_count)
2728 struct GNUNET_MESH_Unicast *msg;
2729 struct MeshTunnel *t;
2733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2734 "MESH: got a unicast packet from %s\n",
2736 size = ntohs (message->size);
2738 sizeof (struct GNUNET_MESH_Unicast) +
2739 sizeof (struct GNUNET_MessageHeader))
2744 msg = (struct GNUNET_MESH_Unicast *) message;
2745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2746 "MESH: of type %u\n",
2747 ntohs (msg[1].header.type));
2748 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2751 /* TODO notify back: we don't know this tunnel */
2752 GNUNET_break_op (0);
2755 tunnel_reset_timeout (t);
2756 pid = GNUNET_PEER_search(&msg->destination);
2759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2760 "MESH: it's for us! sending to clients...\n");
2761 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2764 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2765 "MESH: not for us, retransmitting...\n");
2766 send_message (message, path_get_first_hop(t->tree, pid));
2772 * Core handler for mesh network traffic going from the origin to all peers
2774 * @param cls closure
2775 * @param message message
2776 * @param peer peer identity this notification is about
2777 * @param atsi performance data
2778 * @param atsi_count number of records in 'atsi'
2779 * @return GNUNET_OK to keep the connection open,
2780 * GNUNET_SYSERR to close it (signal serious error)
2782 * TODO: Check who we got this from, to validate route.
2785 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2786 const struct GNUNET_MessageHeader *message,
2787 const struct GNUNET_ATS_Information *atsi,
2788 unsigned int atsi_count)
2790 struct GNUNET_MESH_Multicast *msg;
2791 struct MeshTunnel *t;
2794 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2795 "MESH: got a multicast packet from %s\n",
2797 size = ntohs (message->size);
2798 if (sizeof (struct GNUNET_MESH_Multicast) +
2799 sizeof (struct GNUNET_MessageHeader) > size)
2801 GNUNET_break_op (0);
2804 msg = (struct GNUNET_MESH_Multicast *) message;
2805 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2809 /* TODO notify that we dont know that tunnel */
2810 GNUNET_break_op (0);
2813 tunnel_reset_timeout (t);
2815 /* Transmit to locally interested clients */
2816 if (NULL != t->peers &&
2817 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2819 send_subscribed_clients (message, &msg[1].header);
2821 tunnel_send_multicast(t, message);
2827 * Core handler for mesh network traffic toward the owner of a tunnel
2829 * @param cls closure
2830 * @param message message
2831 * @param peer peer identity this notification is about
2832 * @param atsi performance data
2833 * @param atsi_count number of records in 'atsi'
2835 * @return GNUNET_OK to keep the connection open,
2836 * GNUNET_SYSERR to close it (signal serious error)
2839 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2840 const struct GNUNET_MessageHeader *message,
2841 const struct GNUNET_ATS_Information *atsi,
2842 unsigned int atsi_count)
2844 struct GNUNET_MESH_ToOrigin *msg;
2845 struct GNUNET_PeerIdentity id;
2846 struct MeshPeerInfo *peer_info;
2847 struct MeshTunnel *t;
2850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2851 "MESH: got a ToOrigin packet from %s\n",
2853 size = ntohs (message->size);
2854 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2855 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2857 GNUNET_break_op (0);
2860 msg = (struct GNUNET_MESH_ToOrigin *) message;
2861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2862 "MESH: of type %u\n",
2863 ntohs (msg[1].header.type));
2864 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2868 /* TODO notify that we dont know this tunnel (whom)? */
2869 GNUNET_break_op (0);
2873 if (t->id.oid == myid)
2876 struct GNUNET_MESH_ToOrigin *copy;
2878 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2879 "MESH: it's for us! sending to clients...\n");
2880 if (NULL == t->client)
2882 /* got data packet for ownerless tunnel */
2883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2884 "MESH: no clients!\n");
2885 GNUNET_break_op (0);
2888 /* TODO signature verification */
2889 memcpy (cbuf, message, size);
2890 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2891 copy->tid = htonl (t->local_tid);
2892 GNUNET_SERVER_notification_context_unicast (nc,
2898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2899 "MESH: not for us, retransmitting...\n");
2901 peer_info = peer_info_get (&msg->oid);
2902 if (NULL == peer_info)
2904 /* unknown origin of tunnel */
2908 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2909 send_message (message, &id);
2916 * Core handler for path ACKs
2918 * @param cls closure
2919 * @param message message
2920 * @param peer peer identity this notification is about
2921 * @param atsi performance data
2922 * @param atsi_count number of records in 'atsi'
2924 * @return GNUNET_OK to keep the connection open,
2925 * GNUNET_SYSERR to close it (signal serious error)
2928 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2929 const struct GNUNET_MessageHeader *message,
2930 const struct GNUNET_ATS_Information *atsi,
2931 unsigned int atsi_count)
2933 struct GNUNET_MESH_PathACK *msg;
2934 struct GNUNET_PeerIdentity id;
2935 struct MeshTunnelTreeNode *n;
2936 struct MeshPeerInfo *peer_info;
2937 struct MeshTunnel *t;
2939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2940 "MESH: Received a path ACK msg [%s]\n",
2941 GNUNET_i2s(&my_full_id));
2942 msg = (struct GNUNET_MESH_PathACK *) message;
2943 t = tunnel_get (&msg->oid, msg->tid);
2946 /* TODO notify that we don't know the tunnel */
2950 /* Message for us? */
2951 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2954 if (NULL == t->client)
2956 GNUNET_break_op (0);
2959 if (NULL != t->dht_get_type)
2961 GNUNET_DHT_get_stop (t->dht_get_type);
2962 t->dht_get_type = NULL;
2964 peer_info = peer_info_get (&msg->peer_id);
2965 n = tree_find_peer(t->tree->root, peer_info->id);
2968 GNUNET_break_op (0);
2971 n->status = MESH_PEER_READY;
2972 send_client_peer_connected(t, peer_info->id);
2976 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2977 "MESH: not for us, retransmitting...\n");
2978 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2979 peer_info = peer_info_get (&msg->oid);
2980 if (NULL == peer_info)
2982 /* If we know the tunnel, we should DEFINITELY know the peer */
2986 send_message (message, &id);
2992 * Functions to handle messages from core
2994 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2995 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2996 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
2997 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
2998 sizeof (struct GNUNET_MESH_PathBroken)},
2999 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3000 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3001 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3002 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3003 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3004 sizeof (struct GNUNET_MESH_PathACK)},
3010 /******************************************************************************/
3011 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3012 /******************************************************************************/
3015 * deregister_app: iterator for removing each application registered by a client
3017 * @param cls closure
3018 * @param key the hash of the application id (used to access the hashmap)
3019 * @param value the value stored at the key (client)
3021 * @return GNUNET_OK on success
3024 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3026 GNUNET_break (GNUNET_YES ==
3027 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3033 * notify_client_connection_failure: notify a client that the connection to the
3034 * requested remote peer is not possible (for instance, no route found)
3035 * Function called when the socket is ready to queue more data. "buf" will be
3036 * NULL and "size" zero if the socket was closed for writing in the meantime.
3038 * @param cls closure
3039 * @param size number of bytes available in buf
3040 * @param buf where the callee should write the message
3041 * @return number of bytes written to buf
3044 notify_client_connection_failure (void *cls, size_t size, void *buf)
3047 struct MeshPeerInfo *peer_info;
3048 struct GNUNET_MESH_PeerControl *msg;
3049 struct GNUNET_PeerIdentity id;
3051 if (0 == size && NULL == buf)
3053 // TODO retry? cancel?
3057 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3058 peer_info = (struct MeshPeerInfo *) cls;
3059 msg = (struct GNUNET_MESH_PeerControl *) buf;
3060 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3061 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3062 // msg->tunnel_id = htonl(peer_info->t->tid);
3063 GNUNET_PEER_resolve (peer_info->id, &id);
3064 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3072 * Send keepalive packets for a peer
3074 * @param cls Closure (tunnel for which to send the keepalive).
3075 * @param tc Notification context.
3077 * TODO: implement explicit multicast keepalive?
3080 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3082 struct MeshTunnel *t = cls;
3083 struct GNUNET_MessageHeader *payload;
3084 struct GNUNET_MESH_Multicast *msg;
3085 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3086 sizeof(struct GNUNET_MessageHeader);
3089 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3093 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3095 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3096 "MESH: sending keepalive for tunnel %d\n",
3099 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3100 msg->header.size = htons (size);
3101 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3102 msg->oid = my_full_id;
3103 msg->tid = htonl(t->id.tid);
3104 payload = (struct GNUNET_MessageHeader *) &msg[1];
3105 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3106 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3107 tunnel_send_multicast (t, &msg->header);
3109 t->path_refresh_task =
3110 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3116 * Function to process paths received for a new peer addition. The recorded
3117 * paths form the initial tunnel, which can be optimized later.
3118 * Called on each result obtained for the DHT search.
3120 * @param cls closure
3121 * @param exp when will this value expire
3122 * @param key key of the result
3123 * @param type type of the result
3124 * @param size number of bytes in data
3125 * @param data pointer to the result data
3127 * TODO: re-issue the request after certain time? cancel after X results?
3130 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3131 const GNUNET_HashCode * key,
3132 const struct GNUNET_PeerIdentity *get_path,
3133 unsigned int get_path_length,
3134 const struct GNUNET_PeerIdentity *put_path,
3135 unsigned int put_path_length,
3136 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3138 struct MeshPathInfo *path_info = cls;
3139 struct MeshPeerPath *p;
3140 struct GNUNET_PeerIdentity pi;
3143 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3144 "MESH: Got results from DHT!\n");
3145 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3146 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3149 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3150 // path_info->peer->dhtget = NULL;
3152 p = path_build_from_dht (get_path, get_path_length,
3153 put_path, put_path_length);
3154 path_add_to_peer (path_info->peer, p);
3155 for (i = 0; i < path_info->peer->ntunnels; i++)
3157 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3158 peer_info_connect(path_info->peer, path_info->t);
3160 // GNUNET_free (path_info);
3167 * Function to process paths received for a new peer addition. The recorded
3168 * paths form the initial tunnel, which can be optimized later.
3169 * Called on each result obtained for the DHT search.
3171 * @param cls closure
3172 * @param exp when will this value expire
3173 * @param key key of the result
3174 * @param type type of the result
3175 * @param size number of bytes in data
3176 * @param data pointer to the result data
3179 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3180 const GNUNET_HashCode * key,
3181 const struct GNUNET_PeerIdentity *get_path,
3182 unsigned int get_path_length,
3183 const struct GNUNET_PeerIdentity *put_path,
3184 unsigned int put_path_length,
3185 enum GNUNET_BLOCK_Type type, size_t size,
3188 const struct GNUNET_PeerIdentity *pi = data;
3189 struct MeshTunnel *t = cls;
3190 struct MeshPeerInfo *peer_info;
3191 struct MeshPeerPath *p;
3193 if (size != sizeof (struct GNUNET_PeerIdentity))
3195 GNUNET_break_op (0);
3198 GNUNET_assert (NULL != t->client);
3199 peer_info = peer_info_get (pi);
3200 (void) GNUNET_CONTAINER_multihashmap_put (
3204 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3206 p = path_build_from_dht (get_path, get_path_length,
3207 put_path, put_path_length);
3208 path_add_to_peer (peer_info, p);
3209 tunnel_add_peer(t, peer_info);
3210 peer_info_connect (peer_info, t);
3214 /******************************************************************************/
3215 /********************* MESH LOCAL HANDLES **************************/
3216 /******************************************************************************/
3220 * Handler for client disconnection
3222 * @param cls closure
3223 * @param client identification of the client; NULL
3224 * for the last call when the server is destroyed
3227 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3229 struct MeshClient *c;
3230 struct MeshClient *next;
3232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3238 GNUNET_SERVER_client_drop (client);
3242 if (c->handle != client && NULL != client)
3244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3249 if (NULL != c->tunnels)
3251 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3252 &tunnel_destroy_iterator,
3254 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3257 /* deregister clients applications */
3258 if (NULL != c->apps)
3260 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3261 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3263 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3264 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3266 GNUNET_SCHEDULER_cancel (announce_applications_task);
3267 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3269 if (NULL != c->types)
3270 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3272 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3284 * Handler for new clients
3286 * @param cls closure
3287 * @param client identification of the client
3288 * @param message the actual message, which includes messages the client wants
3291 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3292 const struct GNUNET_MessageHeader *message)
3294 struct GNUNET_MESH_ClientConnect *cc_msg;
3295 struct MeshClient *c;
3296 GNUNET_MESH_ApplicationType *a;
3303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3304 GNUNET_SERVER_client_keep (client);
3305 /* Check data sanity */
3306 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3307 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3308 ntypes = ntohs (cc_msg->types);
3309 napps = ntohs (cc_msg->applications);
3311 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3314 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3318 /* Create new client structure */
3319 c = GNUNET_malloc (sizeof (struct MeshClient));
3321 c->id = next_client_id++;
3323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3325 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3328 GNUNET_MESH_ApplicationType at;
3331 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3332 for (i = 0; i < napps; i++)
3335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3336 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3337 /* store in clients hashmap */
3338 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3339 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3340 /* store in global hashmap, for announcements */
3341 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3342 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3344 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3345 announce_applications_task =
3346 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3354 t = (uint16_t *) & a[napps];
3355 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3356 for (i = 0; i < ntypes; i++)
3359 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3361 /* store in clients hashmap */
3362 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3363 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3364 /* store in global hashmap */
3365 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3366 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3370 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3372 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3373 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3374 GNUNET_SERVER_notification_context_add (nc, client);
3376 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3384 * Handler for requests of new tunnels
3386 * @param cls closure
3387 * @param client identification of the client
3388 * @param message the actual message
3391 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3392 const struct GNUNET_MessageHeader *message)
3394 struct GNUNET_MESH_TunnelMessage *t_msg;
3395 struct MeshTunnel *t;
3396 struct MeshClient *c;
3397 GNUNET_HashCode hash;
3399 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3401 /* Sanity check for client registration */
3402 if (NULL == (c = client_get (client)))
3405 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3412 /* Message sanity check */
3413 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3416 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3420 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3421 /* Sanity check for tunnel numbering */
3422 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3425 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3428 /* Sanity check for duplicate tunnel IDs */
3429 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3432 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3436 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3437 while (NULL != tunnel_get_by_pi (myid, next_tid))
3438 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3439 t->id.tid = next_tid++;
3441 t->local_tid = ntohl (t_msg->tunnel_id);
3443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3444 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3445 GNUNET_i2s (&my_full_id),
3450 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3452 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3454 GNUNET_CONTAINER_multihashmap_put (
3455 c->tunnels, &hash, t,
3456 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3459 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3463 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3465 GNUNET_CONTAINER_multihashmap_put (
3467 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3470 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3473 t->tree = tree_new (t, myid);
3474 t->tree->refresh = REFRESH_PATH_TIME;
3475 t->tree->root->status = MESH_PEER_READY;
3476 t->tree->me = t->tree->root;
3478 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3484 * Handler for requests of deleting tunnels
3486 * @param cls closure
3487 * @param client identification of the client
3488 * @param message the actual message
3491 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3492 const struct GNUNET_MessageHeader *message)
3494 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3495 struct MeshClient *c;
3496 struct MeshTunnel *t;
3497 MESH_TunnelNumber tid;
3498 GNUNET_HashCode hash;
3500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3501 "MESH: Got a DESTROY TUNNEL from client!\n");
3503 /* Sanity check for client registration */
3504 if (NULL == (c = client_get (client)))
3507 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3510 /* Message sanity check */
3511 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3514 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3520 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3522 /* Retrieve tunnel */
3523 tid = ntohl (tunnel_msg->tunnel_id);
3525 /* Remove from local id hashmap */
3526 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3527 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3528 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
3531 tunnel_send_destroy (t);
3533 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3539 * Handler for connection requests to new peers
3541 * @param cls closure
3542 * @param client identification of the client
3543 * @param message the actual message (PeerControl)
3546 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3547 const struct GNUNET_MessageHeader *message)
3549 struct GNUNET_MESH_PeerControl *peer_msg;
3550 struct MeshPeerInfo *peer_info;
3551 struct MeshClient *c;
3552 struct MeshTunnel *t;
3553 MESH_TunnelNumber tid;
3555 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3556 /* Sanity check for client registration */
3557 if (NULL == (c = client_get (client)))
3560 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3564 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3565 /* Sanity check for message size */
3566 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3569 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3573 /* Tunnel exists? */
3574 tid = ntohl (peer_msg->tunnel_id);
3575 t = tunnel_get_by_local_id (c, tid);
3579 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3583 /* Does client own tunnel? */
3584 if (t->client->handle != client)
3587 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3590 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3591 GNUNET_i2s(&peer_msg->peer));
3592 peer_info = peer_info_get (&peer_msg->peer);
3594 tunnel_add_peer(t, peer_info);
3595 peer_info_connect(peer_info, t);
3597 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3603 * Handler for disconnection requests of peers in a tunnel
3605 * @param cls closure
3606 * @param client identification of the client
3607 * @param message the actual message (PeerControl)
3610 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3611 const struct GNUNET_MessageHeader *message)
3613 struct GNUNET_MESH_PeerControl *peer_msg;
3614 struct MeshPeerInfo *peer_info;
3615 struct MeshClient *c;
3616 struct MeshTunnel *t;
3617 MESH_TunnelNumber tid;
3619 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3620 /* Sanity check for client registration */
3621 if (NULL == (c = client_get (client)))
3624 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3627 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3628 /* Sanity check for message size */
3629 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3632 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3636 /* Tunnel exists? */
3637 tid = ntohl (peer_msg->tunnel_id);
3638 t = tunnel_get_by_local_id (c, tid);
3642 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3647 /* Does client own tunnel? */
3648 if (t->client->handle != client)
3651 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3656 "MESH: for peer %s\n",
3657 GNUNET_i2s(&peer_msg->peer));
3658 /* Is the peer in the tunnel? */
3659 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3660 &peer_msg->peer.hashPubKey);
3661 if (NULL == peer_info)
3664 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3668 /* Ok, delete peer from tunnel */
3669 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3670 &peer_msg->peer.hashPubKey);
3672 send_destroy_path (t, peer_info->id);
3673 tunnel_delete_peer(t, peer_info->id);
3674 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3680 * Handler for connection requests to new peers by type
3682 * @param cls closure
3683 * @param client identification of the client
3684 * @param message the actual message (ConnectPeerByType)
3687 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3688 const struct GNUNET_MessageHeader *message)
3690 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3691 struct MeshClient *c;
3692 struct MeshTunnel *t;
3693 GNUNET_HashCode hash;
3694 MESH_TunnelNumber tid;
3696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3697 /* Sanity check for client registration */
3698 if (NULL == (c = client_get (client)))
3701 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3705 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3706 /* Sanity check for message size */
3707 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3708 ntohs (connect_msg->header.size))
3711 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3715 /* Tunnel exists? */
3716 tid = ntohl (connect_msg->tunnel_id);
3717 t = tunnel_get_by_local_id (c, tid);
3721 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3725 /* Does client own tunnel? */
3726 if (t->client->handle != client)
3729 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3733 /* Do WE have the service? */
3734 t->type = ntohl (connect_msg->type);
3735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3736 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3737 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3740 /* Yes! Fast forward, add ourselves to the tunnel and send the
3741 * good news to the client
3743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3744 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3745 peer_info_get (&my_full_id),
3746 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3749 send_client_peer_connected(t, myid);
3750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3751 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3754 /* Ok, lets find a peer offering the service */
3755 if (NULL != t->dht_get_type)
3757 GNUNET_DHT_get_stop (t->dht_get_type);
3759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3760 GNUNET_h2s (&hash));
3762 GNUNET_DHT_get_start (dht_handle,
3763 GNUNET_TIME_UNIT_FOREVER_REL,
3764 GNUNET_BLOCK_TYPE_TEST,
3767 GNUNET_DHT_RO_RECORD_ROUTE |
3768 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3770 &dht_get_type_handler, t);
3772 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3778 * Handler for client traffic directed to one peer
3780 * @param cls closure
3781 * @param client identification of the client
3782 * @param message the actual message
3785 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3786 const struct GNUNET_MessageHeader *message)
3788 struct MeshClient *c;
3789 struct MeshTunnel *t;
3790 struct MeshPeerInfo *pi;
3791 struct GNUNET_MESH_Unicast *data_msg;
3792 MESH_TunnelNumber tid;
3795 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3796 "MESH: Got a unicast request from a client!\n");
3798 /* Sanity check for client registration */
3799 if (NULL == (c = client_get (client)))
3802 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3805 data_msg = (struct GNUNET_MESH_Unicast *) message;
3806 /* Sanity check for message size */
3807 size = ntohs (message->size);
3808 if (sizeof (struct GNUNET_MESH_Unicast) +
3809 sizeof (struct GNUNET_MessageHeader) > size)
3812 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3816 /* Tunnel exists? */
3817 tid = ntohl (data_msg->tid);
3818 t = tunnel_get_by_local_id (c, tid);
3822 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3826 /* Is it a local tunnel? Then, does client own the tunnel? */
3827 if (NULL != t->client &&
3828 NULL != t->client->handle &&
3829 t->client->handle != client)
3832 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3836 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3837 &data_msg->destination.hashPubKey);
3838 /* Is the selected peer in the tunnel? */
3842 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3846 /* Ok, everything is correct, send the message
3847 * (pretend we got it from a mesh peer)
3850 char buf[ntohs (message->size)];
3851 struct GNUNET_MESH_Unicast *copy;
3853 /* Work around const limitation */
3854 copy = (struct GNUNET_MESH_Unicast *) buf;
3855 memcpy (buf, data_msg, size);
3856 copy->oid = my_full_id;
3857 copy->tid = htonl (t->id.tid);
3858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3859 "MESH: calling generic handler...\n");
3860 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3862 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3868 * Handler for client traffic directed to the origin
3870 * @param cls closure
3871 * @param client identification of the client
3872 * @param message the actual message
3875 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3876 const struct GNUNET_MessageHeader *message)
3878 struct GNUNET_MESH_ToOrigin *data_msg;
3879 struct GNUNET_PeerIdentity id;
3880 struct MeshClient *c;
3881 struct MeshTunnel *t;
3882 MESH_TunnelNumber tid;
3885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3886 "MESH: Got a ToOrigin request from a client!\n");
3888 /* Sanity check for client registration */
3889 if (NULL == (c = client_get (client)))
3892 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3895 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3896 /* Sanity check for message size */
3897 size = ntohs (message->size);
3898 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3899 sizeof (struct GNUNET_MessageHeader) > size)
3902 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3906 /* Tunnel exists? */
3907 tid = ntohl (data_msg->tid);
3908 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3911 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3914 t = tunnel_get_by_local_id (c, tid);
3918 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3922 /* It shouldn't be a local tunnel. */
3923 if (NULL != t->client)
3926 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3929 GNUNET_PEER_resolve(t->id.oid, &id);
3931 /* Ok, everything is correct, send the message
3932 * (pretend we got it from a mesh peer)
3935 char buf[ntohs (message->size)];
3936 struct GNUNET_MESH_ToOrigin *copy;
3938 /* Work around const limitation */
3939 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3940 memcpy (buf, data_msg, size);
3942 copy->tid = htonl (t->id.tid);
3943 copy->sender = my_full_id;
3944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3945 "MESH: calling generic handler...\n");
3946 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3948 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3954 * Handler for client traffic directed to all peers in a tunnel
3956 * @param cls closure
3957 * @param client identification of the client
3958 * @param message the actual message
3961 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3962 const struct GNUNET_MessageHeader *message)
3964 struct MeshClient *c;
3965 struct MeshTunnel *t;
3966 struct GNUNET_MESH_Multicast *data_msg;
3967 MESH_TunnelNumber tid;
3969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3970 "MESH: Got a multicast request from a client!\n");
3972 /* Sanity check for client registration */
3973 if (NULL == (c = client_get (client)))
3976 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3979 data_msg = (struct GNUNET_MESH_Multicast *) message;
3980 /* Sanity check for message size */
3981 if (sizeof (struct GNUNET_MESH_Multicast) +
3982 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
3985 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3989 /* Tunnel exists? */
3990 tid = ntohl (data_msg->tid);
3991 t = tunnel_get_by_local_id (c, tid);
3995 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3999 /* Does client own tunnel? */
4000 if (t->client->handle != client)
4003 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4008 char buf[ntohs(message->size)];
4009 struct GNUNET_MESH_Multicast *copy;
4011 copy = (struct GNUNET_MESH_Multicast *)buf;
4012 memcpy(buf, message, ntohs(message->size));
4013 copy->oid = my_full_id;
4014 copy->tid = htonl(t->id.tid);
4015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4016 "MESH: calling generic handler...\n");
4017 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4020 /* receive done gets called when last copy is sent to a neighbor */
4025 * Functions to handle messages from clients
4027 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4028 {&handle_local_new_client, NULL,
4029 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4030 {&handle_local_tunnel_create, NULL,
4031 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4032 sizeof (struct GNUNET_MESH_TunnelMessage)},
4033 {&handle_local_tunnel_destroy, NULL,
4034 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4035 sizeof (struct GNUNET_MESH_TunnelMessage)},
4036 {&handle_local_connect_add, NULL,
4037 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4038 sizeof (struct GNUNET_MESH_PeerControl)},
4039 {&handle_local_connect_del, NULL,
4040 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4041 sizeof (struct GNUNET_MESH_PeerControl)},
4042 {&handle_local_connect_by_type, NULL,
4043 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4044 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4045 {&handle_local_unicast, NULL,
4046 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4047 {&handle_local_to_origin, NULL,
4048 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4049 {&handle_local_multicast, NULL,
4050 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4056 * To be called on core init/fail.
4058 * @param cls service closure
4059 * @param server handle to the server for this service
4060 * @param identity the public identity of this peer
4063 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4064 const struct GNUNET_PeerIdentity *identity)
4066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4067 core_handle = server;
4068 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4070 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4071 GNUNET_SCHEDULER_shutdown();
4077 * Method called whenever a given peer connects.
4079 * @param cls closure
4080 * @param peer peer identity this notification is about
4081 * @param atsi performance data for the connection
4082 * @param atsi_count number of records in 'atsi'
4085 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4086 const struct GNUNET_ATS_Information *atsi,
4087 unsigned int atsi_count)
4089 struct MeshPeerInfo *peer_info;
4090 struct MeshPeerPath *path;
4092 #if MESH_DEBUG_CONNECTION
4093 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4095 GNUNET_i2s(&my_full_id));
4097 peer_info = peer_info_get (peer);
4098 if (myid == peer_info->id)
4100 #if MESH_DEBUG_CONNECTION
4101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4105 #if MESH_DEBUG_CONNECTION
4108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4112 path = path_new (2);
4113 path->peers[0] = myid;
4114 path->peers[1] = peer_info->id;
4115 GNUNET_PEER_change_rc(myid, 1);
4116 GNUNET_PEER_change_rc(peer_info->id, 1);
4117 path_add_to_peer (peer_info, path);
4122 * Method called whenever a peer disconnects.
4124 * @param cls closure
4125 * @param peer peer identity this notification is about
4128 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4130 struct MeshPeerInfo *pi;
4133 #if MESH_DEBUG_CONNECTION
4134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4136 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4142 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4144 /* TODO: notify that the transmission failed */
4145 peer_info_cancel_transmission(pi, i);
4147 path_remove_from_peer (pi, pi->id, myid);
4148 #if MESH_DEBUG_CONNECTION
4151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4158 /******************************************************************************/
4159 /************************ MAIN FUNCTIONS ****************************/
4160 /******************************************************************************/
4163 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4165 * @param cls closure
4166 * @param key current key code
4167 * @param value value in the hash map
4168 * @return GNUNET_YES if we should continue to iterate,
4172 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4174 struct MeshTunnel *t = value;
4180 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4182 * @param cls closure
4183 * @param key current key code
4184 * @param value value in the hash map
4185 * @return GNUNET_YES if we should continue to iterate,
4189 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4191 struct MeshPeerInfo *p = value;
4192 peer_info_destroy (p);
4197 * Task run during shutdown.
4203 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4206 /* TODO: destroy tunnels? */
4207 if (core_handle != NULL)
4209 GNUNET_CORE_disconnect (core_handle);
4212 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4213 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4214 if (dht_handle != NULL)
4216 GNUNET_DHT_disconnect (dht_handle);
4221 GNUNET_SERVER_notification_context_destroy (nc);
4224 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4226 GNUNET_SCHEDULER_cancel (announce_id_task);
4227 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4229 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4233 * Process mesh requests.
4235 * @param cls closure
4236 * @param server the initialized server
4237 * @param c configuration to use
4240 run (void *cls, struct GNUNET_SERVER_Handle *server,
4241 const struct GNUNET_CONFIGURATION_Handle *c)
4243 struct MeshPeerInfo *peer;
4244 struct MeshPeerPath *p;
4247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4248 server_handle = server;
4249 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4250 CORE_QUEUE_SIZE, /* queue size */
4251 NULL, /* Closure passed to MESH functions */
4252 &core_init, /* Call core_init once connected */
4253 &core_connect, /* Handle connects */
4254 &core_disconnect, /* remove peers on disconnects */
4255 NULL, /* Don't notify about all incoming messages */
4256 GNUNET_NO, /* For header only in notification */
4257 NULL, /* Don't notify about all outbound messages */
4258 GNUNET_NO, /* For header-only out notification */
4259 core_handlers); /* Register these handlers */
4260 if (core_handle == NULL)
4263 GNUNET_SCHEDULER_shutdown ();
4268 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4271 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4273 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4274 GNUNET_SCHEDULER_shutdown ();
4277 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4278 GNUNET_free (keyfile);
4279 if (my_private_key == NULL)
4281 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4282 _("Mesh service could not access hostkey. Exiting.\n"));
4283 GNUNET_SCHEDULER_shutdown ();
4286 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4287 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4288 &my_full_id.hashPubKey);
4289 myid = GNUNET_PEER_intern (&my_full_id);
4291 dht_handle = GNUNET_DHT_connect (c, 64);
4292 if (dht_handle == NULL)
4298 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4300 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4301 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4302 peers = GNUNET_CONTAINER_multihashmap_create (32);
4303 applications = GNUNET_CONTAINER_multihashmap_create (32);
4304 types = GNUNET_CONTAINER_multihashmap_create (32);
4306 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4307 nc = GNUNET_SERVER_notification_context_create (server_handle,
4309 GNUNET_SERVER_disconnect_notify (server_handle,
4310 &handle_local_client_disconnect,
4315 clients_tail = NULL;
4320 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4321 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4323 /* Create a peer_info for the local peer */
4324 peer = peer_info_get(&my_full_id);
4327 path_add_to_peer(peer, p);
4329 /* Scheduled the task to clean up when shutdown is called */
4330 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4337 * The main function for the mesh service.
4339 * @param argc number of arguments from the command line
4340 * @param argv command line arguments
4341 * @return 0 ok, 1 on error
4344 main (int argc, char *const *argv)
4348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4351 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");