2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - 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. Fucntion makes a copy of it.
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 MeshPeerPath *p;
1242 p = tree_get_path_to_peer(t->tree, destination);
1248 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1249 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1251 struct GNUNET_MESH_ManipulatePath *msg;
1252 struct GNUNET_PeerIdentity *pi;
1256 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1257 msg->header.size = htons (size);
1258 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1259 msg->tid = htonl (t->id.tid);
1260 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1261 for (i = 0; i < p->length; i++)
1263 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1265 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1272 * Try to establish a new connection to this peer.
1273 * Use the best path for the given tunnel.
1274 * If the peer doesn't have any path to it yet, try to get one.
1275 * If the peer already has some path, send a CREATE PATH towards it.
1277 * @param peer PeerInfo of the peer.
1278 * @param t Tunnel for which to create the path, if possible.
1281 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1283 struct MeshPeerPath *p;
1284 struct MeshPathInfo *path_info;
1286 if (NULL != peer->path_head)
1288 p = tree_get_path_to_peer(t->tree, peer->id);
1291 send_create_path(peer, p, t);
1296 send_client_peer_connected(t, myid);
1299 else if (NULL == peer->dhtget)
1301 struct GNUNET_PeerIdentity id;
1303 GNUNET_PEER_resolve(peer->id, &id);
1304 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1305 path_info->peer = peer;
1307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1308 "MESH: Starting DHT GET for peer %s\n",
1310 peer->dhtgetcls = path_info;
1312 GNUNET_DHT_get_start(dht_handle, /* handle */
1313 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1314 GNUNET_BLOCK_TYPE_TEST, /* type */
1315 &id.hashPubKey, /* key to search */
1316 4, /* replication level */
1317 GNUNET_DHT_RO_RECORD_ROUTE |
1318 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1320 0, /* xquery bits */
1321 &dht_get_id_handler,
1324 /* Otherwise, there is no path but the DHT get is already started. */
1329 * Destroy the peer_info and free any allocated resources linked to it
1331 * @param pi The peer_info to destroy.
1333 * @return GNUNET_OK on success
1336 peer_info_destroy (struct MeshPeerInfo *pi)
1338 struct GNUNET_PeerIdentity id;
1339 struct MeshPeerPath *p;
1340 struct MeshPeerPath *nextp;
1343 GNUNET_PEER_resolve (pi->id, &id);
1344 GNUNET_PEER_change_rc (pi->id, -1);
1347 GNUNET_CONTAINER_multihashmap_remove (peers,&id.hashPubKey, pi))
1350 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1351 "MESH: removing peer %s, not in hashmap\n",
1354 if (NULL != pi->dhtget)
1356 GNUNET_DHT_get_stop(pi->dhtget);
1357 GNUNET_free (pi->dhtgetcls);
1359 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1361 peer_info_cancel_transmission(pi, i);
1367 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1377 * Remove all paths that rely on a direct connection between p1 and p2
1378 * from the peer itself and notify all tunnels about it.
1380 * @param peer PeerInfo of affected peer.
1381 * @param p1 GNUNET_PEER_Id of one peer.
1382 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1385 * TODO: optimize (see below)
1388 path_remove_from_peer (struct MeshPeerInfo *peer,
1392 struct MeshPeerPath *p;
1393 struct MeshPeerPath *aux;
1394 struct MeshPeerInfo *peer_d;
1396 unsigned int destroyed;
1402 p = peer->path_head;
1406 for (i = 0; i < (p->length - 1); i++)
1408 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1409 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1411 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1422 for (i = 0; i < peer->ntunnels; i++)
1424 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1426 * Problem: one or more peers have been deleted from the tunnel tree.
1427 * We don't know who they are to try to add them again.
1428 * We need to try to find a new path for each of the disconnected peers.
1429 * Some of them might already have a path to reach them that does not
1430 * involve p1 and p2. Adding all anew might render in a better tree than
1431 * the trivial immediate fix.
1433 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1434 * its children will be reachable trough him.
1436 peer_d = peer_info_get_short(d);
1439 for (p = peer_d->path_head; NULL != p; p = p->next)
1441 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1449 /* No callback, as peer will be already disconnected */
1450 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1454 peer_info_connect (peer_d, peer->tunnels[i]);
1461 * Add the path to the peer and update the path used to reach it in case this
1464 * @param peer_info Destination peer to add the path to.
1465 * @param path New path to add. Last peer must be the peer in arg 1.
1466 * Path will be either used of freed if already known.
1468 * TODO: trim the part from origin to us? Add it as path to origin?
1471 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1473 struct MeshPeerPath *aux;
1478 struct GNUNET_PeerIdentity id;
1480 GNUNET_PEER_resolve (peer_info->id, &id);
1481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1482 "MESH: adding path [%u] to peer %s\n",
1486 if (NULL == peer_info || NULL == path)
1489 path_destroy (path);
1493 l = path_get_length (path);
1500 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1502 l2 = path_get_length (aux);
1505 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1506 peer_info->path_tail,
1513 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1520 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1521 peer_info->path_tail,
1528 * Add the path to the origin peer and update the path used to reach it in case
1529 * this is the shortest.
1530 * The path is given in peer_info -> destination, therefore we turn the path
1531 * upside down first.
1533 * @param peer_info Peer to add the path to, being the origin of the path.
1534 * @param path New path to add after being inversed.
1537 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1540 path_add_to_peer (peer_info, path);
1545 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1546 * to obtain a local peer -> destination path and interning the peer ids.
1548 * @return Newly allocated and created path
1550 static struct MeshPeerPath *
1551 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1552 unsigned int get_path_length,
1553 const struct GNUNET_PeerIdentity *put_path,
1554 unsigned int put_path_length)
1556 struct MeshPeerPath *p;
1562 GNUNET_PEER_change_rc(myid, 1);
1563 i = get_path_length;
1564 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1565 for (i--; i >= 0; i--)
1567 id = GNUNET_PEER_intern (&get_path[i]);
1568 if (p->length > 0 && id == p->peers[p->length - 1])
1570 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1571 GNUNET_PEER_change_rc(id, -1);
1575 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1576 "MESH: Adding from GET: %s.\n",
1577 GNUNET_i2s(&get_path[i]));
1579 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1580 p->peers[p->length - 1] = id;
1583 i = put_path_length;
1584 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1585 for (i--; i >= 0; i--)
1587 id = GNUNET_PEER_intern (&put_path[i]);
1590 /* PUT path went through us, so discard the path up until now and start
1591 * from here to get a much shorter (and loop-free) path.
1596 if (p->length > 0 && id == p->peers[p->length - 1])
1598 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1599 GNUNET_PEER_change_rc(id, -1);
1603 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1604 "MESH: Adding from PUT: %s.\n",
1605 GNUNET_i2s(&put_path[i]));
1607 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1608 p->peers[p->length - 1] = id;
1612 if (get_path_length > 0)
1613 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1614 "MESH: (first of GET: %s)\n",
1615 GNUNET_i2s(&get_path[0]));
1616 if (put_path_length > 0)
1617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1618 "MESH: (first of PUT: %s)\n",
1619 GNUNET_i2s(&put_path[0]));
1620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1621 "MESH: In total: %d hops\n",
1623 for (i = 0; i < p->length; i++)
1625 struct GNUNET_PeerIdentity peer_id;
1627 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1628 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1631 GNUNET_i2s(&peer_id));
1639 * Send keepalive packets for a peer
1641 * @param cls Closure (tunnel for which to send the keepalive).
1642 * @param tc Notification context.
1644 * TODO: implement explicit multicast keepalive?
1647 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1651 * Search for a tunnel among the tunnels for a client
1653 * @param c the client whose tunnels to search in
1654 * @param tid the local id of the tunnel
1656 * @return tunnel handler, NULL if doesn't exist
1658 static struct MeshTunnel *
1659 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1661 GNUNET_HashCode hash;
1663 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1664 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1666 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1668 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1673 * Search for a tunnel by global ID using PEER_ID
1675 * @param pi owner of the tunnel
1676 * @param tid global tunnel number
1678 * @return tunnel handler, NULL if doesn't exist
1680 static struct MeshTunnel *
1681 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1683 struct MESH_TunnelID id;
1684 GNUNET_HashCode hash;
1689 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1690 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1695 * Search for a tunnel by global ID using full PeerIdentities
1697 * @param oid owner of the tunnel
1698 * @param tid global tunnel number
1700 * @return tunnel handler, NULL if doesn't exist
1702 static struct MeshTunnel *
1703 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1705 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1710 * Callback used to notify a client owner of a tunnel that a peer has
1711 * disconnected, most likely because of a path change.
1713 * @param n Node in the tree representing the disconnected peer
1715 * FIXME: pass tunnel via cls, make param just a peer identity
1718 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1720 struct MeshPeerInfo *peer;
1722 if (NULL != n->t->client && NULL != nc)
1724 struct GNUNET_MESH_PeerControl msg;
1725 msg.header.size = htons (sizeof (msg));
1726 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1727 msg.tunnel_id = htonl (n->t->local_tid);
1728 GNUNET_PEER_resolve (n->peer, &msg.peer);
1729 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1730 &msg.header, GNUNET_NO);
1732 peer = peer_info_get_short(n->peer);
1733 peer_info_connect(peer, n->t);
1738 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1739 * needed rescources.
1740 * If peer already exists, reevaluate shortest path and change if different.
1742 * @param t Tunnel we want to add a new peer to
1743 * @param peer PeerInfo of the peer being added
1747 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1749 struct GNUNET_PeerIdentity id;
1750 struct MeshPeerPath *best_p;
1751 struct MeshPeerPath *p;
1752 unsigned int best_cost;
1755 GNUNET_PEER_resolve(peer->id, &id);
1757 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1760 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1761 GNUNET_CONTAINER_multihashmap_put(
1765 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1768 if (NULL != (p = peer->path_head))
1771 best_cost = path_get_cost(t->tree, p);
1774 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1781 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1782 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1783 t->path_refresh_task =
1784 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1788 /* Start a DHT get if necessary */
1789 peer_info_connect(peer, t);
1794 * Add a path to a tunnel which we don't own, just to remember the next hop.
1795 * If destination node was already in the tunnel, the first hop information
1796 * will be replaced with the new path.
1798 * @param t Tunnel we want to add a new peer to
1799 * @param p Path to add
1800 * @param own_pos Position of local node in path.
1804 tunnel_add_path (struct MeshTunnel *t,
1805 struct MeshPeerPath *p,
1806 unsigned int own_pos)
1808 struct GNUNET_PeerIdentity id;
1810 GNUNET_assert (0 != own_pos);
1811 tree_add_path(t->tree, p, NULL);
1812 if (NULL == t->tree->me)
1813 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1814 if (own_pos < p->length - 1)
1816 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1817 tree_update_first_hops(t->tree, t->tree->me, &id);
1823 * Notifies a tunnel that a connection has broken that affects at least
1824 * some of its peers. Sends a notification towards the root of the tree.
1825 * In case the peer is the owner of the tree, notifies the client that owns
1826 * the tunnel and tries to reconnect.
1828 * @param t Tunnel affected.
1829 * @param p1 Peer that got disconnected from p2.
1830 * @param p2 Peer that got disconnected from p1.
1832 * @return Short ID of the peer disconnected (either p1 or p2).
1833 * 0 if the tunnel remained unaffected.
1835 static GNUNET_PEER_Id
1836 tunnel_notify_connection_broken (struct MeshTunnel *t,
1842 pid = tree_notify_connection_broken (t->tree,
1845 ¬ify_peer_disconnected);
1846 if (myid != p1 && myid != p2)
1852 if (NULL != t->tree->me->parent)
1854 /* We are the peer still connected, notify owner of the disconnection. */
1855 struct GNUNET_MESH_PathBroken msg;
1856 struct GNUNET_PeerIdentity neighbor;
1858 msg.header.size = htons (sizeof (msg));
1859 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1860 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1861 msg.tid = htonl (t->id.tid);
1862 msg.peer1 = my_full_id;
1863 GNUNET_PEER_resolve (pid, &msg.peer2);
1864 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1865 send_message (&msg.header, &neighbor);
1873 * Send a message in a tunnel in multicast, sending a copy to each child node
1874 * down the local one in the tunnel tree.
1876 * @param t Tunnel in which to send the data.
1877 * @param msg Message to be sent
1879 * @return Number of copies sent.
1881 * TODO: unifiy shared resources and reference counter management
1884 tunnel_send_multicast (struct MeshTunnel *t,
1885 const struct GNUNET_MessageHeader *msg)
1887 struct GNUNET_PeerIdentity neighbor;
1888 struct MeshDataDescriptor *info;
1889 struct MeshTunnelTreeNode *n;
1890 struct MeshTunnelTreeNode *counter;
1891 GNUNET_SCHEDULER_TaskIdentifier *task;
1892 unsigned int *copies;
1897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1898 "MESH: sending a multicast packet...\n");
1899 size = ntohs (msg->size);
1900 GNUNET_assert (NULL != t->tree->me);
1901 n = t->tree->me->children_head;
1904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1905 "MESH: no children in the tree, no one to send.\n");
1908 copies = GNUNET_malloc (sizeof (unsigned int));
1909 for (counter = n; NULL != counter; counter = counter->next)
1911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1912 data = GNUNET_malloc (size);
1913 memcpy (data, msg, size);
1914 if (NULL != t->client)
1916 task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
1917 *task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1922 task = NULL; // So GCC shuts up about task being potentially uninitialized
1925 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1928 info->copies = copies;
1929 if (NULL != t->client)
1931 info->client = t->client->handle;
1932 info->timeout_task = task;
1934 info->destination = n->peer;
1935 GNUNET_PEER_resolve (n->peer, &neighbor);
1936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1937 "MESH: sending to %s...\n",
1938 GNUNET_i2s (&neighbor));
1939 info->peer = peer_info_get(&neighbor);
1940 GNUNET_assert (NULL != info->peer);
1941 i = peer_info_transmit_slot(info->peer);
1942 info->handler_n = i;
1943 info->peer->infos[i] = info;
1944 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1945 info->peer->core_transmit[i] =
1946 GNUNET_CORE_notify_transmit_ready (core_handle,
1949 GNUNET_TIME_UNIT_FOREVER_REL,
1952 &send_core_data_multicast, info);
1960 * Send a message to all peers in this tunnel that the tunnel is no longer
1963 * @param t The tunnel whose peers to notify.
1966 tunnel_send_destroy (struct MeshTunnel *t)
1968 struct GNUNET_MESH_TunnelDestroy msg;
1970 msg.header.size = htons (sizeof (msg));
1971 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
1972 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1973 msg.tid = htonl (t->id.tid);
1974 tunnel_send_multicast (t, &msg.header);
1980 * Destroy the tunnel and free any allocated resources linked to it
1982 * @param t the tunnel to destroy
1984 * @return GNUNET_OK on success
1987 tunnel_destroy (struct MeshTunnel *t)
1989 struct MeshClient *c;
1990 struct MeshQueue *q;
1991 struct MeshQueue *qn;
1992 GNUNET_HashCode hash;
2001 struct GNUNET_PeerIdentity id;
2003 GNUNET_PEER_resolve(t->id.oid, &id);
2004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2005 "MESH: destroying tunnel %s [%x]\n",
2009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2013 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2014 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2019 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2021 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2025 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2027 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2028 GNUNET_break (GNUNET_YES ==
2029 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2032 if (NULL != t->peers)
2034 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2035 &peer_info_delete_tunnel, t);
2036 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2041 if (NULL != q->data)
2042 GNUNET_free (q->data);
2046 /* TODO cancel core transmit ready in case it was active */
2048 tree_destroy(t->tree);
2049 if (NULL != t->dht_get_type)
2050 GNUNET_DHT_get_stop(t->dht_get_type);
2051 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2052 GNUNET_SCHEDULER_cancel(t->timeout_task);
2053 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2054 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2061 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2062 * that are no longer needed, as well as nodes of no longer reachable peers.
2063 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2065 * @param t Tunnel from which to remove the path.
2066 * @param p Peer which should be removed.
2069 tunnel_delete_peer (struct MeshTunnel *t,
2070 GNUNET_PEER_Id peer)
2072 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2073 if (NULL == t->tree->root)
2079 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2080 * client when the client disconnects.
2082 * @param cls closure (client that is disconnecting)
2083 * @param key the hash of the local tunnel id (used to access the hashmap)
2084 * @param value the value stored at the key (tunnel to destroy)
2086 * @return GNUNET_OK on success
2089 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2091 struct MeshTunnel *t = value;
2094 if (NULL != t->dht_get_type)
2096 GNUNET_DHT_get_stop (t->dht_get_type);
2098 r = tunnel_destroy (t);
2104 * Timeout function, destroys tunnel if called
2106 * @param cls Closure (tunnel to destroy).
2107 * @param tc TaskContext
2110 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2112 struct MeshTunnel *t = cls;
2114 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2116 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2121 * Resets the tunnel timeout. Starts it if no timeout was running.
2123 * @param t Tunnel whose timeout to reset.
2126 tunnel_reset_timeout (struct MeshTunnel *t)
2128 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2129 GNUNET_SCHEDULER_cancel (t->timeout_task);
2130 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2131 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2137 /******************************************************************************/
2138 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2139 /******************************************************************************/
2142 * Function called to notify a client about the socket
2143 * being ready to queue more data. "buf" will be
2144 * NULL and "size" zero if the socket was closed for
2145 * writing in the meantime.
2147 * @param cls closure
2148 * @param size number of bytes available in buf
2149 * @param buf where the callee should write the message
2150 * @return number of bytes written to buf
2153 send_core_create_path (void *cls, size_t size, void *buf)
2155 struct MeshPathInfo *info = cls;
2156 struct GNUNET_MESH_ManipulatePath *msg;
2157 struct GNUNET_PeerIdentity *peer_ptr;
2158 struct MeshPeerInfo *peer = info->peer;
2159 struct MeshTunnel *t = info->t;
2160 struct MeshPeerPath *p = info->path;
2164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2165 "MESH: CREATE PATH sending...\n");
2167 sizeof (struct GNUNET_MESH_ManipulatePath) +
2168 p->length * sizeof (struct GNUNET_PeerIdentity);
2170 if (size < size_needed || NULL == buf)
2172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2176 info->peer->core_transmit[info->pos] =
2177 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2178 GNUNET_TIME_UNIT_FOREVER_REL,
2179 path_get_first_hop (t->tree, peer->id),
2181 &send_core_create_path,
2185 info->peer->core_transmit[info->pos] = NULL;
2188 struct GNUNET_PeerIdentity id;
2190 GNUNET_PEER_resolve (peer->id, &id);
2191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2192 "MESH: setting core_transmit %s [%u] to NULL\n",
2197 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2198 msg->header.size = htons (size_needed);
2199 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2200 msg->tid = ntohl (t->id.tid);
2202 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2203 for (i = 0; i < p->length; i++)
2205 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2211 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2212 "MESH: CREATE PATH (%u bytes long) sent!\n",
2219 * Function called to notify a client about the socket
2220 * being ready to queue more data. "buf" will be
2221 * NULL and "size" zero if the socket was closed for
2222 * writing in the meantime.
2224 * @param cls closure (data itself)
2225 * @param size number of bytes available in buf
2226 * @param buf where the callee should write the message
2228 * @return number of bytes written to buf
2231 send_core_data_multicast (void *cls, size_t size, void *buf)
2233 struct MeshDataDescriptor *info = cls;
2236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2237 GNUNET_assert (NULL != info);
2238 GNUNET_assert (NULL != info->peer);
2239 total_size = info->size;
2240 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2242 if (total_size > size)
2245 struct GNUNET_PeerIdentity id;
2247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2248 "MESH: Multicast: retransmitting... (%u/%u)\n",
2250 GNUNET_PEER_resolve(info->peer->id, &id);
2251 info->peer->core_transmit[info->handler_n] =
2252 GNUNET_CORE_notify_transmit_ready (core_handle,
2255 GNUNET_TIME_UNIT_FOREVER_REL,
2258 &send_core_data_multicast,
2262 info->peer->core_transmit[info->handler_n] = NULL;
2263 info->peer->infos[info->handler_n] = NULL;
2264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2265 memcpy (buf, info->data, total_size);
2268 struct GNUNET_MESH_Multicast *mc;
2269 struct GNUNET_MessageHeader *mh;
2272 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2274 mc = (struct GNUNET_MESH_Multicast *) mh;
2275 mh = (struct GNUNET_MessageHeader *) &mc[1];
2276 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2277 "MESH: multicast, payload type %u\n",
2279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2280 "MESH: multicast, payload size %u\n",
2285 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2291 data_descriptor_decrement_multicast (info);
2292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2300 * Function called to notify a client about the socket
2301 * being ready to queue more data. "buf" will be
2302 * NULL and "size" zero if the socket was closed for
2303 * writing in the meantime.
2305 * @param cls closure (MeshDataDescriptor)
2306 * @param size number of bytes available in buf
2307 * @param buf where the callee should write the message
2308 * @return number of bytes written to buf
2311 send_core_path_ack (void *cls, size_t size, void *buf)
2313 struct MeshDataDescriptor *info = cls;
2314 struct GNUNET_MESH_PathACK *msg = buf;
2316 GNUNET_assert (NULL != info);
2319 info->peer->core_transmit[info->handler_n] = NULL;
2321 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2326 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2327 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2328 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2329 msg->tid = htonl (info->origin->tid);
2330 msg->peer_id = my_full_id;
2332 /* TODO add signature */
2334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2335 return sizeof (struct GNUNET_MESH_PathACK);
2339 /******************************************************************************/
2340 /******************** MESH NETWORK HANDLERS **************************/
2341 /******************************************************************************/
2345 * Core handler for path creation
2347 * @param cls closure
2348 * @param message message
2349 * @param peer peer identity this notification is about
2350 * @param atsi performance data
2351 * @param atsi_count number of records in 'atsi'
2353 * @return GNUNET_OK to keep the connection open,
2354 * GNUNET_SYSERR to close it (signal serious error)
2357 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2358 const struct GNUNET_MessageHeader *message,
2359 const struct GNUNET_ATS_Information *atsi,
2360 unsigned int atsi_count)
2362 unsigned int own_pos;
2365 MESH_TunnelNumber tid;
2366 struct GNUNET_MESH_ManipulatePath *msg;
2367 struct GNUNET_PeerIdentity *pi;
2368 GNUNET_HashCode hash;
2369 struct MeshPeerPath *path;
2370 struct MeshPeerInfo *dest_peer_info;
2371 struct MeshPeerInfo *orig_peer_info;
2372 struct MeshTunnel *t;
2374 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2375 "MESH: Received a path create msg [%s]\n",
2376 GNUNET_i2s(&my_full_id));
2377 size = ntohs (message->size);
2378 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2380 GNUNET_break_op (0);
2384 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2385 if (size % sizeof (struct GNUNET_PeerIdentity))
2387 GNUNET_break_op (0);
2390 size /= sizeof (struct GNUNET_PeerIdentity);
2393 GNUNET_break_op (0);
2396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2397 "MESH: path has %u hops.\n",
2399 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2401 tid = ntohl (msg->tid);
2402 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2403 t = tunnel_get (pi, tid);
2404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2405 "MESH: path is for tunnel %s [%X].\n",
2410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2411 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2412 t->id.oid = GNUNET_PEER_intern (pi);
2414 t->local_tid = next_local_tid++;
2415 /* FIXME test if taken */
2416 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2417 t->tree = tree_new(t, t->id.oid);
2419 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2421 GNUNET_CONTAINER_multihashmap_put (
2425 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2431 tunnel_reset_timeout (t);
2432 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2434 GNUNET_CONTAINER_multihashmap_put (
2438 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2446 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2447 if (NULL == dest_peer_info)
2449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2450 "MESH: Creating PeerInfo for destination.\n");
2451 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2452 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2453 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2455 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2457 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2458 if (NULL == orig_peer_info)
2460 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2461 "MESH: Creating PeerInfo for origin.\n");
2462 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2463 orig_peer_info->id = GNUNET_PEER_intern (pi);
2464 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2465 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2467 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2468 path = path_new (size);
2470 for (i = 0; i < size; i++)
2472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2473 "MESH: ... adding %s\n",
2474 GNUNET_i2s(&pi[i]));
2475 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2476 if (path->peers[i] == myid)
2479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2480 "MESH: Own position: %u\n", own_pos);
2483 /* cannot be self, must be 'not found' */
2484 /* create path: self not found in path through self */
2485 GNUNET_break_op (0);
2486 path_destroy (path);
2487 /* FIXME error. destroy tunnel? leave for timeout? */
2490 tunnel_add_path (t, path, own_pos);
2491 if (own_pos == size - 1)
2493 /* It is for us! Send ack. */
2494 struct GNUNET_MESH_TunnelNotification cmsg;
2495 struct MeshDataDescriptor *info;
2498 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2499 "MESH: It's for us!\n");
2500 path_add_to_origin (orig_peer_info, path);
2501 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2502 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2504 &my_full_id.hashPubKey,
2505 peer_info_get(&my_full_id),
2506 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2507 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2508 info->origin = &t->id;
2509 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2510 GNUNET_assert (NULL != info->peer);
2511 j = peer_info_transmit_slot(info->peer);
2512 info->handler_n = j;
2513 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2514 info->peer->infos[j] = info;
2515 info->peer->core_transmit[j] =
2516 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2517 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2518 sizeof (struct GNUNET_MESH_PathACK),
2519 &send_core_path_ack, info);
2520 cmsg.header.size = htons(sizeof(cmsg));
2521 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2522 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2523 cmsg.tunnel_id = htonl(t->local_tid);
2524 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2528 struct MeshPeerPath *path2;
2530 /* It's for somebody else! Retransmit. */
2531 path2 = path_duplicate(path);
2532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2533 "MESH: Retransmitting.\n");
2534 path_add_to_peer(dest_peer_info, path);
2535 path = path_duplicate(path2);
2536 path_add_to_origin(orig_peer_info, path2);
2537 send_create_path(dest_peer_info, path, t);
2544 * Core handler for path destruction
2546 * @param cls closure
2547 * @param message message
2548 * @param peer peer identity this notification is about
2549 * @param atsi performance data
2550 * @param atsi_count number of records in 'atsi'
2552 * @return GNUNET_OK to keep the connection open,
2553 * GNUNET_SYSERR to close it (signal serious error)
2556 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2557 const struct GNUNET_MessageHeader *message,
2558 const struct GNUNET_ATS_Information *atsi,
2559 unsigned int atsi_count)
2561 struct GNUNET_MESH_ManipulatePath *msg;
2562 struct GNUNET_PeerIdentity *pi;
2563 struct MeshPeerPath *path;
2564 struct MeshTunnel *t;
2565 unsigned int own_pos;
2569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2570 "MESH: Received a PATH DESTROY msg from %s\n",
2572 size = ntohs (message->size);
2573 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2575 GNUNET_break_op (0);
2579 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2580 if (size % sizeof (struct GNUNET_PeerIdentity))
2582 GNUNET_break_op (0);
2585 size /= sizeof (struct GNUNET_PeerIdentity);
2588 GNUNET_break_op (0);
2591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2592 "MESH: path has %u hops.\n",
2595 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2596 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2598 "MESH: path is for tunnel %s [%X].\n",
2601 t = tunnel_get (pi, ntohl (msg->tid));
2604 /* TODO notify back: we don't know this tunnel */
2605 GNUNET_break_op (0);
2608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2609 path = path_new (size);
2611 for (i = 0; i < size; i++)
2613 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2614 "MESH: ... adding %s\n",
2615 GNUNET_i2s(&pi[i]));
2616 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2617 if (path->peers[i] == myid)
2620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2621 "MESH: Own position: %u\n", own_pos);
2622 if (own_pos < path->length - 1)
2623 send_message (message, &pi[own_pos + 1]);
2624 tunnel_delete_peer (t, path->peers[path->length - 1]);
2625 path_destroy (path);
2631 * Core handler for notifications of broken paths
2633 * @param cls closure
2634 * @param message message
2635 * @param peer peer identity this notification is about
2636 * @param atsi performance data
2637 * @param atsi_count number of records in 'atsi'
2639 * @return GNUNET_OK to keep the connection open,
2640 * GNUNET_SYSERR to close it (signal serious error)
2643 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2644 const struct GNUNET_MessageHeader *message,
2645 const struct GNUNET_ATS_Information *atsi,
2646 unsigned int atsi_count)
2648 struct GNUNET_MESH_PathBroken *msg;
2649 struct MeshTunnel *t;
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2652 "MESH: Received a PATH BROKEN msg from %s\n",
2654 msg = (struct GNUNET_MESH_PathBroken *) message;
2655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2656 "MESH: regarding %s\n",
2657 GNUNET_i2s(&msg->peer1));
2658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2659 "MESH: regarding %s\n",
2660 GNUNET_i2s(&msg->peer2));
2661 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2664 GNUNET_break_op (0);
2667 tunnel_notify_connection_broken(t,
2668 GNUNET_PEER_search(&msg->peer1),
2669 GNUNET_PEER_search(&msg->peer2));
2676 * Core handler for tunnel destruction
2678 * @param cls closure
2679 * @param message message
2680 * @param peer peer identity this notification is about
2681 * @param atsi performance data
2682 * @param atsi_count number of records in 'atsi'
2684 * @return GNUNET_OK to keep the connection open,
2685 * GNUNET_SYSERR to close it (signal serious error)
2688 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2689 const struct GNUNET_MessageHeader *message,
2690 const struct GNUNET_ATS_Information *atsi,
2691 unsigned int atsi_count)
2693 struct GNUNET_MESH_TunnelDestroy *msg;
2694 struct MeshTunnel *t;
2696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2697 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2699 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2701 "MESH: for tunnel %s [%u]\n",
2702 GNUNET_i2s (&msg->oid),
2704 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2707 /* Probably already got the message from another path,
2708 * destroyed the tunnel and retransmitted to children.
2713 if (t->id.oid == myid)
2715 GNUNET_break_op (0);
2718 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2720 /* Tunnel was incoming, notify clients */
2721 send_clients_tunnel_destroy (t);
2723 tunnel_send_destroy (t);
2730 * Core handler for mesh network traffic going from the origin to a peer
2732 * @param cls closure
2733 * @param peer peer identity this notification is about
2734 * @param message message
2735 * @param atsi performance data
2736 * @param atsi_count number of records in 'atsi'
2737 * @return GNUNET_OK to keep the connection open,
2738 * GNUNET_SYSERR to close it (signal serious error)
2741 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2742 const struct GNUNET_MessageHeader *message,
2743 const struct GNUNET_ATS_Information *atsi,
2744 unsigned int atsi_count)
2746 struct GNUNET_MESH_Unicast *msg;
2747 struct MeshTunnel *t;
2751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2752 "MESH: got a unicast packet from %s\n",
2754 size = ntohs (message->size);
2756 sizeof (struct GNUNET_MESH_Unicast) +
2757 sizeof (struct GNUNET_MessageHeader))
2762 msg = (struct GNUNET_MESH_Unicast *) message;
2763 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2764 "MESH: of type %u\n",
2765 ntohs (msg[1].header.type));
2766 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2769 /* TODO notify back: we don't know this tunnel */
2770 GNUNET_break_op (0);
2773 tunnel_reset_timeout (t);
2774 pid = GNUNET_PEER_search(&msg->destination);
2777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2778 "MESH: it's for us! sending to clients...\n");
2779 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2783 "MESH: not for us, retransmitting...\n");
2784 send_message (message, path_get_first_hop(t->tree, pid));
2790 * Core handler for mesh network traffic going from the origin to all peers
2792 * @param cls closure
2793 * @param message message
2794 * @param peer peer identity this notification is about
2795 * @param atsi performance data
2796 * @param atsi_count number of records in 'atsi'
2797 * @return GNUNET_OK to keep the connection open,
2798 * GNUNET_SYSERR to close it (signal serious error)
2800 * TODO: Check who we got this from, to validate route.
2803 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2804 const struct GNUNET_MessageHeader *message,
2805 const struct GNUNET_ATS_Information *atsi,
2806 unsigned int atsi_count)
2808 struct GNUNET_MESH_Multicast *msg;
2809 struct MeshTunnel *t;
2812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2813 "MESH: got a multicast packet from %s\n",
2815 size = ntohs (message->size);
2816 if (sizeof (struct GNUNET_MESH_Multicast) +
2817 sizeof (struct GNUNET_MessageHeader) > size)
2819 GNUNET_break_op (0);
2822 msg = (struct GNUNET_MESH_Multicast *) message;
2823 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2827 /* TODO notify that we dont know that tunnel */
2828 GNUNET_break_op (0);
2831 tunnel_reset_timeout (t);
2833 /* Transmit to locally interested clients */
2834 if (NULL != t->peers &&
2835 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2837 send_subscribed_clients (message, &msg[1].header);
2839 tunnel_send_multicast(t, message);
2845 * Core handler for mesh network traffic toward the owner of a tunnel
2847 * @param cls closure
2848 * @param message message
2849 * @param peer peer identity this notification is about
2850 * @param atsi performance data
2851 * @param atsi_count number of records in 'atsi'
2853 * @return GNUNET_OK to keep the connection open,
2854 * GNUNET_SYSERR to close it (signal serious error)
2857 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2858 const struct GNUNET_MessageHeader *message,
2859 const struct GNUNET_ATS_Information *atsi,
2860 unsigned int atsi_count)
2862 struct GNUNET_MESH_ToOrigin *msg;
2863 struct GNUNET_PeerIdentity id;
2864 struct MeshPeerInfo *peer_info;
2865 struct MeshTunnel *t;
2868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2869 "MESH: got a ToOrigin packet from %s\n",
2871 size = ntohs (message->size);
2872 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2873 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2875 GNUNET_break_op (0);
2878 msg = (struct GNUNET_MESH_ToOrigin *) message;
2879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2880 "MESH: of type %u\n",
2881 ntohs (msg[1].header.type));
2882 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2886 /* TODO notify that we dont know this tunnel (whom)? */
2887 GNUNET_break_op (0);
2891 if (t->id.oid == myid)
2894 struct GNUNET_MESH_ToOrigin *copy;
2896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2897 "MESH: it's for us! sending to clients...\n");
2898 if (NULL == t->client)
2900 /* got data packet for ownerless tunnel */
2901 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2902 "MESH: no clients!\n");
2903 GNUNET_break_op (0);
2906 /* TODO signature verification */
2907 memcpy (cbuf, message, size);
2908 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2909 copy->tid = htonl (t->local_tid);
2910 GNUNET_SERVER_notification_context_unicast (nc,
2916 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2917 "MESH: not for us, retransmitting...\n");
2919 peer_info = peer_info_get (&msg->oid);
2920 if (NULL == peer_info)
2922 /* unknown origin of tunnel */
2926 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2927 send_message (message, &id);
2934 * Core handler for path ACKs
2936 * @param cls closure
2937 * @param message message
2938 * @param peer peer identity this notification is about
2939 * @param atsi performance data
2940 * @param atsi_count number of records in 'atsi'
2942 * @return GNUNET_OK to keep the connection open,
2943 * GNUNET_SYSERR to close it (signal serious error)
2946 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2947 const struct GNUNET_MessageHeader *message,
2948 const struct GNUNET_ATS_Information *atsi,
2949 unsigned int atsi_count)
2951 struct GNUNET_MESH_PathACK *msg;
2952 struct GNUNET_PeerIdentity id;
2953 struct MeshTunnelTreeNode *n;
2954 struct MeshPeerInfo *peer_info;
2955 struct MeshTunnel *t;
2957 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2958 "MESH: Received a path ACK msg [%s]\n",
2959 GNUNET_i2s(&my_full_id));
2960 msg = (struct GNUNET_MESH_PathACK *) message;
2961 t = tunnel_get (&msg->oid, msg->tid);
2964 /* TODO notify that we don't know the tunnel */
2968 /* Message for us? */
2969 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2972 if (NULL == t->client)
2974 GNUNET_break_op (0);
2977 if (NULL != t->dht_get_type)
2979 GNUNET_DHT_get_stop (t->dht_get_type);
2980 t->dht_get_type = NULL;
2982 peer_info = peer_info_get (&msg->peer_id);
2983 n = tree_find_peer(t->tree->root, peer_info->id);
2986 GNUNET_break_op (0);
2989 n->status = MESH_PEER_READY;
2990 send_client_peer_connected(t, peer_info->id);
2994 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2995 "MESH: not for us, retransmitting...\n");
2996 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2997 peer_info = peer_info_get (&msg->oid);
2998 if (NULL == peer_info)
3000 /* If we know the tunnel, we should DEFINITELY know the peer */
3004 send_message (message, &id);
3010 * Functions to handle messages from core
3012 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3013 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3014 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3015 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3016 sizeof (struct GNUNET_MESH_PathBroken)},
3017 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3018 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3019 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3020 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3021 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3022 sizeof (struct GNUNET_MESH_PathACK)},
3028 /******************************************************************************/
3029 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3030 /******************************************************************************/
3033 * deregister_app: iterator for removing each application registered by a client
3035 * @param cls closure
3036 * @param key the hash of the application id (used to access the hashmap)
3037 * @param value the value stored at the key (client)
3039 * @return GNUNET_OK on success
3042 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3044 GNUNET_break (GNUNET_YES ==
3045 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3051 * notify_client_connection_failure: notify a client that the connection to the
3052 * requested remote peer is not possible (for instance, no route found)
3053 * Function called when the socket is ready to queue more data. "buf" will be
3054 * NULL and "size" zero if the socket was closed for writing in the meantime.
3056 * @param cls closure
3057 * @param size number of bytes available in buf
3058 * @param buf where the callee should write the message
3059 * @return number of bytes written to buf
3062 notify_client_connection_failure (void *cls, size_t size, void *buf)
3065 struct MeshPeerInfo *peer_info;
3066 struct GNUNET_MESH_PeerControl *msg;
3067 struct GNUNET_PeerIdentity id;
3069 if (0 == size && NULL == buf)
3071 // TODO retry? cancel?
3075 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3076 peer_info = (struct MeshPeerInfo *) cls;
3077 msg = (struct GNUNET_MESH_PeerControl *) buf;
3078 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3079 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3080 // msg->tunnel_id = htonl(peer_info->t->tid);
3081 GNUNET_PEER_resolve (peer_info->id, &id);
3082 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3090 * Send keepalive packets for a peer
3092 * @param cls Closure (tunnel for which to send the keepalive).
3093 * @param tc Notification context.
3095 * TODO: implement explicit multicast keepalive?
3098 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3100 struct MeshTunnel *t = cls;
3101 struct GNUNET_MessageHeader *payload;
3102 struct GNUNET_MESH_Multicast *msg;
3103 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3104 sizeof(struct GNUNET_MessageHeader);
3107 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3111 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3114 "MESH: sending keepalive for tunnel %d\n",
3117 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3118 msg->header.size = htons (size);
3119 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3120 msg->oid = my_full_id;
3121 msg->tid = htonl(t->id.tid);
3122 payload = (struct GNUNET_MessageHeader *) &msg[1];
3123 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3124 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3125 tunnel_send_multicast (t, &msg->header);
3127 t->path_refresh_task =
3128 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3134 * Function to process paths received for a new peer addition. The recorded
3135 * paths form the initial tunnel, which can be optimized later.
3136 * Called on each result obtained for the DHT search.
3138 * @param cls closure
3139 * @param exp when will this value expire
3140 * @param key key of the result
3141 * @param type type of the result
3142 * @param size number of bytes in data
3143 * @param data pointer to the result data
3145 * TODO: re-issue the request after certain time? cancel after X results?
3148 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3149 const GNUNET_HashCode * key,
3150 const struct GNUNET_PeerIdentity *get_path,
3151 unsigned int get_path_length,
3152 const struct GNUNET_PeerIdentity *put_path,
3153 unsigned int put_path_length,
3154 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3156 struct MeshPathInfo *path_info = cls;
3157 struct MeshPeerPath *p;
3158 struct GNUNET_PeerIdentity pi;
3161 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3162 "MESH: Got results from DHT!\n");
3163 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3164 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3167 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3168 // path_info->peer->dhtget = NULL;
3170 p = path_build_from_dht (get_path, get_path_length,
3171 put_path, put_path_length);
3172 path_add_to_peer (path_info->peer, p);
3173 for (i = 0; i < path_info->peer->ntunnels; i++)
3175 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3176 peer_info_connect(path_info->peer, path_info->t);
3178 // GNUNET_free (path_info);
3185 * Function to process paths received for a new peer addition. The recorded
3186 * paths form the initial tunnel, which can be optimized later.
3187 * Called on each result obtained for the DHT search.
3189 * @param cls closure
3190 * @param exp when will this value expire
3191 * @param key key of the result
3192 * @param type type of the result
3193 * @param size number of bytes in data
3194 * @param data pointer to the result data
3197 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3198 const GNUNET_HashCode * key,
3199 const struct GNUNET_PeerIdentity *get_path,
3200 unsigned int get_path_length,
3201 const struct GNUNET_PeerIdentity *put_path,
3202 unsigned int put_path_length,
3203 enum GNUNET_BLOCK_Type type, size_t size,
3206 const struct GNUNET_PeerIdentity *pi = data;
3207 struct MeshTunnel *t = cls;
3208 struct MeshPeerInfo *peer_info;
3209 struct MeshPeerPath *p;
3211 if (size != sizeof (struct GNUNET_PeerIdentity))
3213 GNUNET_break_op (0);
3216 GNUNET_assert (NULL != t->client);
3217 peer_info = peer_info_get (pi);
3218 (void) GNUNET_CONTAINER_multihashmap_put (
3222 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3224 p = path_build_from_dht (get_path, get_path_length,
3225 put_path, put_path_length);
3226 path_add_to_peer (peer_info, p);
3227 tunnel_add_peer(t, peer_info);
3228 peer_info_connect (peer_info, t);
3232 /******************************************************************************/
3233 /********************* MESH LOCAL HANDLES **************************/
3234 /******************************************************************************/
3238 * Handler for client disconnection
3240 * @param cls closure
3241 * @param client identification of the client; NULL
3242 * for the last call when the server is destroyed
3245 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3247 struct MeshClient *c;
3248 struct MeshClient *next;
3250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3253 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3259 if (c->handle != client && NULL != client)
3261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3266 GNUNET_SERVER_client_drop (c->handle);
3267 if (NULL != c->tunnels)
3269 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3270 &tunnel_destroy_iterator,
3272 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3275 /* deregister clients applications */
3276 if (NULL != c->apps)
3278 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3279 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3281 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3282 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3284 GNUNET_SCHEDULER_cancel (announce_applications_task);
3285 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3287 if (NULL != c->types)
3288 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3290 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3302 * Handler for new clients
3304 * @param cls closure
3305 * @param client identification of the client
3306 * @param message the actual message, which includes messages the client wants
3309 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3310 const struct GNUNET_MessageHeader *message)
3312 struct GNUNET_MESH_ClientConnect *cc_msg;
3313 struct MeshClient *c;
3314 GNUNET_MESH_ApplicationType *a;
3321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3322 /* Check data sanity */
3323 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3324 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3325 ntypes = ntohs (cc_msg->types);
3326 napps = ntohs (cc_msg->applications);
3328 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3331 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3335 /* Create new client structure */
3336 c = GNUNET_malloc (sizeof (struct MeshClient));
3338 c->id = next_client_id++;
3340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3342 GNUNET_SERVER_client_keep (client);
3343 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3346 GNUNET_MESH_ApplicationType at;
3349 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3350 for (i = 0; i < napps; i++)
3353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3354 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3355 /* store in clients hashmap */
3356 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3357 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3358 /* store in global hashmap, for announcements */
3359 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3360 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3362 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3363 announce_applications_task =
3364 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3372 t = (uint16_t *) & a[napps];
3373 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3374 for (i = 0; i < ntypes; i++)
3377 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3379 /* store in clients hashmap */
3380 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3381 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3382 /* store in global hashmap */
3383 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3384 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3388 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3390 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3391 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3392 GNUNET_SERVER_notification_context_add (nc, client);
3394 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3402 * Handler for requests of new tunnels
3404 * @param cls closure
3405 * @param client identification of the client
3406 * @param message the actual message
3409 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3410 const struct GNUNET_MessageHeader *message)
3412 struct GNUNET_MESH_TunnelMessage *t_msg;
3413 struct MeshTunnel *t;
3414 struct MeshClient *c;
3415 GNUNET_HashCode hash;
3417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3419 /* Sanity check for client registration */
3420 if (NULL == (c = client_get (client)))
3423 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3427 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3430 /* Message sanity check */
3431 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3434 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3438 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3439 /* Sanity check for tunnel numbering */
3440 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3443 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3446 /* Sanity check for duplicate tunnel IDs */
3447 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3450 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3454 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3455 while (NULL != tunnel_get_by_pi (myid, next_tid))
3456 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3457 t->id.tid = next_tid++;
3459 t->local_tid = ntohl (t_msg->tunnel_id);
3461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3462 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3463 GNUNET_i2s (&my_full_id),
3468 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3470 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3472 GNUNET_CONTAINER_multihashmap_put (
3473 c->tunnels, &hash, t,
3474 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3477 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3481 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3483 GNUNET_CONTAINER_multihashmap_put (
3485 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3488 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3491 t->tree = tree_new (t, myid);
3492 t->tree->refresh = REFRESH_PATH_TIME;
3493 t->tree->root->status = MESH_PEER_READY;
3494 t->tree->me = t->tree->root;
3496 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3502 * Handler for requests of deleting tunnels
3504 * @param cls closure
3505 * @param client identification of the client
3506 * @param message the actual message
3509 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3510 const struct GNUNET_MessageHeader *message)
3512 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3513 struct MeshClient *c;
3514 struct MeshTunnel *t;
3515 MESH_TunnelNumber tid;
3516 GNUNET_HashCode hash;
3518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3519 "MESH: Got a DESTROY TUNNEL from client!\n");
3521 /* Sanity check for client registration */
3522 if (NULL == (c = client_get (client)))
3525 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3528 /* Message sanity check */
3529 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3532 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3538 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3540 /* Retrieve tunnel */
3541 tid = ntohl (tunnel_msg->tunnel_id);
3543 /* Remove from local id hashmap */
3544 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3545 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3546 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
3549 tunnel_send_destroy (t);
3551 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3557 * Handler for connection requests to new peers
3559 * @param cls closure
3560 * @param client identification of the client
3561 * @param message the actual message (PeerControl)
3564 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3565 const struct GNUNET_MessageHeader *message)
3567 struct GNUNET_MESH_PeerControl *peer_msg;
3568 struct MeshPeerInfo *peer_info;
3569 struct MeshClient *c;
3570 struct MeshTunnel *t;
3571 MESH_TunnelNumber tid;
3573 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3574 /* Sanity check for client registration */
3575 if (NULL == (c = client_get (client)))
3578 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3582 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3583 /* Sanity check for message size */
3584 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3587 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3591 /* Tunnel exists? */
3592 tid = ntohl (peer_msg->tunnel_id);
3593 t = tunnel_get_by_local_id (c, tid);
3597 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3601 /* Does client own tunnel? */
3602 if (t->client->handle != client)
3605 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3608 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3609 GNUNET_i2s(&peer_msg->peer));
3610 peer_info = peer_info_get (&peer_msg->peer);
3612 tunnel_add_peer(t, peer_info);
3613 peer_info_connect(peer_info, t);
3615 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3621 * Handler for disconnection requests of peers in a tunnel
3623 * @param cls closure
3624 * @param client identification of the client
3625 * @param message the actual message (PeerControl)
3628 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3629 const struct GNUNET_MessageHeader *message)
3631 struct GNUNET_MESH_PeerControl *peer_msg;
3632 struct MeshPeerInfo *peer_info;
3633 struct MeshClient *c;
3634 struct MeshTunnel *t;
3635 MESH_TunnelNumber tid;
3637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3638 /* Sanity check for client registration */
3639 if (NULL == (c = client_get (client)))
3642 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3645 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3646 /* Sanity check for message size */
3647 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3650 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3654 /* Tunnel exists? */
3655 tid = ntohl (peer_msg->tunnel_id);
3656 t = tunnel_get_by_local_id (c, tid);
3660 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3665 /* Does client own tunnel? */
3666 if (t->client->handle != client)
3669 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3674 "MESH: for peer %s\n",
3675 GNUNET_i2s(&peer_msg->peer));
3676 /* Is the peer in the tunnel? */
3677 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3678 &peer_msg->peer.hashPubKey);
3679 if (NULL == peer_info)
3682 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3686 /* Ok, delete peer from tunnel */
3687 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3688 &peer_msg->peer.hashPubKey);
3690 send_destroy_path (t, peer_info->id);
3691 tunnel_delete_peer(t, peer_info->id);
3692 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3698 * Handler for connection requests to new peers by type
3700 * @param cls closure
3701 * @param client identification of the client
3702 * @param message the actual message (ConnectPeerByType)
3705 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3706 const struct GNUNET_MessageHeader *message)
3708 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3709 struct MeshClient *c;
3710 struct MeshTunnel *t;
3711 GNUNET_HashCode hash;
3712 MESH_TunnelNumber tid;
3714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3715 /* Sanity check for client registration */
3716 if (NULL == (c = client_get (client)))
3719 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3723 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3724 /* Sanity check for message size */
3725 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3726 ntohs (connect_msg->header.size))
3729 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3733 /* Tunnel exists? */
3734 tid = ntohl (connect_msg->tunnel_id);
3735 t = tunnel_get_by_local_id (c, tid);
3739 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3743 /* Does client own tunnel? */
3744 if (t->client->handle != client)
3747 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3751 /* Do WE have the service? */
3752 t->type = ntohl (connect_msg->type);
3753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3754 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3755 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3758 /* Yes! Fast forward, add ourselves to the tunnel and send the
3759 * good news to the client
3761 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3762 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3763 peer_info_get (&my_full_id),
3764 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3767 send_client_peer_connected(t, myid);
3768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3769 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3772 /* Ok, lets find a peer offering the service */
3773 if (NULL != t->dht_get_type)
3775 GNUNET_DHT_get_stop (t->dht_get_type);
3777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3778 GNUNET_h2s (&hash));
3780 GNUNET_DHT_get_start (dht_handle,
3781 GNUNET_TIME_UNIT_FOREVER_REL,
3782 GNUNET_BLOCK_TYPE_TEST,
3785 GNUNET_DHT_RO_RECORD_ROUTE |
3786 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3788 &dht_get_type_handler, t);
3790 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3796 * Handler for client traffic directed to one peer
3798 * @param cls closure
3799 * @param client identification of the client
3800 * @param message the actual message
3803 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3804 const struct GNUNET_MessageHeader *message)
3806 struct MeshClient *c;
3807 struct MeshTunnel *t;
3808 struct MeshPeerInfo *pi;
3809 struct GNUNET_MESH_Unicast *data_msg;
3810 MESH_TunnelNumber tid;
3813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3814 "MESH: Got a unicast request from a client!\n");
3816 /* Sanity check for client registration */
3817 if (NULL == (c = client_get (client)))
3820 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3823 data_msg = (struct GNUNET_MESH_Unicast *) message;
3824 /* Sanity check for message size */
3825 size = ntohs (message->size);
3826 if (sizeof (struct GNUNET_MESH_Unicast) +
3827 sizeof (struct GNUNET_MessageHeader) > size)
3830 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3834 /* Tunnel exists? */
3835 tid = ntohl (data_msg->tid);
3836 t = tunnel_get_by_local_id (c, tid);
3840 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3844 /* Is it a local tunnel? Then, does client own the tunnel? */
3845 if (NULL != t->client &&
3846 NULL != t->client->handle &&
3847 t->client->handle != client)
3850 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3854 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3855 &data_msg->destination.hashPubKey);
3856 /* Is the selected peer in the tunnel? */
3860 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3864 /* Ok, everything is correct, send the message
3865 * (pretend we got it from a mesh peer)
3868 char buf[ntohs (message->size)];
3869 struct GNUNET_MESH_Unicast *copy;
3871 /* Work around const limitation */
3872 copy = (struct GNUNET_MESH_Unicast *) buf;
3873 memcpy (buf, data_msg, size);
3874 copy->oid = my_full_id;
3875 copy->tid = htonl (t->id.tid);
3876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3877 "MESH: calling generic handler...\n");
3878 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3880 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3886 * Handler for client traffic directed to the origin
3888 * @param cls closure
3889 * @param client identification of the client
3890 * @param message the actual message
3893 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3894 const struct GNUNET_MessageHeader *message)
3896 struct GNUNET_MESH_ToOrigin *data_msg;
3897 struct GNUNET_PeerIdentity id;
3898 struct MeshClient *c;
3899 struct MeshTunnel *t;
3900 MESH_TunnelNumber tid;
3903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3904 "MESH: Got a ToOrigin request from a client!\n");
3906 /* Sanity check for client registration */
3907 if (NULL == (c = client_get (client)))
3910 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3913 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3914 /* Sanity check for message size */
3915 size = ntohs (message->size);
3916 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3917 sizeof (struct GNUNET_MessageHeader) > size)
3920 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3924 /* Tunnel exists? */
3925 tid = ntohl (data_msg->tid);
3926 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3929 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3932 t = tunnel_get_by_local_id (c, tid);
3936 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3940 /* It shouldn't be a local tunnel. */
3941 if (NULL != t->client)
3944 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3947 GNUNET_PEER_resolve(t->id.oid, &id);
3949 /* Ok, everything is correct, send the message
3950 * (pretend we got it from a mesh peer)
3953 char buf[ntohs (message->size)];
3954 struct GNUNET_MESH_ToOrigin *copy;
3956 /* Work around const limitation */
3957 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3958 memcpy (buf, data_msg, size);
3960 copy->tid = htonl (t->id.tid);
3961 copy->sender = my_full_id;
3962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3963 "MESH: calling generic handler...\n");
3964 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3966 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3972 * Handler for client traffic directed to all peers in a tunnel
3974 * @param cls closure
3975 * @param client identification of the client
3976 * @param message the actual message
3979 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3980 const struct GNUNET_MessageHeader *message)
3982 struct MeshClient *c;
3983 struct MeshTunnel *t;
3984 struct GNUNET_MESH_Multicast *data_msg;
3985 MESH_TunnelNumber tid;
3987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3988 "MESH: Got a multicast request from a client!\n");
3990 /* Sanity check for client registration */
3991 if (NULL == (c = client_get (client)))
3994 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3997 data_msg = (struct GNUNET_MESH_Multicast *) message;
3998 /* Sanity check for message size */
3999 if (sizeof (struct GNUNET_MESH_Multicast) +
4000 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4003 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4007 /* Tunnel exists? */
4008 tid = ntohl (data_msg->tid);
4009 t = tunnel_get_by_local_id (c, tid);
4013 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4017 /* Does client own tunnel? */
4018 if (t->client->handle != client)
4021 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4026 char buf[ntohs(message->size)];
4027 struct GNUNET_MESH_Multicast *copy;
4029 copy = (struct GNUNET_MESH_Multicast *)buf;
4030 memcpy(buf, message, ntohs(message->size));
4031 copy->oid = my_full_id;
4032 copy->tid = htonl(t->id.tid);
4033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4034 "MESH: calling generic handler...\n");
4035 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4038 /* receive done gets called when last copy is sent to a neighbor */
4043 * Functions to handle messages from clients
4045 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4046 {&handle_local_new_client, NULL,
4047 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4048 {&handle_local_tunnel_create, NULL,
4049 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4050 sizeof (struct GNUNET_MESH_TunnelMessage)},
4051 {&handle_local_tunnel_destroy, NULL,
4052 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4053 sizeof (struct GNUNET_MESH_TunnelMessage)},
4054 {&handle_local_connect_add, NULL,
4055 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4056 sizeof (struct GNUNET_MESH_PeerControl)},
4057 {&handle_local_connect_del, NULL,
4058 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4059 sizeof (struct GNUNET_MESH_PeerControl)},
4060 {&handle_local_connect_by_type, NULL,
4061 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4062 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4063 {&handle_local_unicast, NULL,
4064 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4065 {&handle_local_to_origin, NULL,
4066 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4067 {&handle_local_multicast, NULL,
4068 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4074 * To be called on core init/fail.
4076 * @param cls service closure
4077 * @param server handle to the server for this service
4078 * @param identity the public identity of this peer
4081 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4082 const struct GNUNET_PeerIdentity *identity)
4084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4085 core_handle = server;
4086 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4088 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4089 GNUNET_SCHEDULER_shutdown();
4095 * Method called whenever a given peer connects.
4097 * @param cls closure
4098 * @param peer peer identity this notification is about
4099 * @param atsi performance data for the connection
4100 * @param atsi_count number of records in 'atsi'
4103 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4104 const struct GNUNET_ATS_Information *atsi,
4105 unsigned int atsi_count)
4107 struct MeshPeerInfo *peer_info;
4108 struct MeshPeerPath *path;
4110 #if MESH_DEBUG_CONNECTION
4111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4113 GNUNET_i2s(&my_full_id));
4115 peer_info = peer_info_get (peer);
4116 if (myid == peer_info->id)
4118 #if MESH_DEBUG_CONNECTION
4119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4123 #if MESH_DEBUG_CONNECTION
4126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4130 path = path_new (2);
4131 path->peers[0] = myid;
4132 path->peers[1] = peer_info->id;
4133 GNUNET_PEER_change_rc(myid, 1);
4134 GNUNET_PEER_change_rc(peer_info->id, 1);
4135 path_add_to_peer (peer_info, path);
4140 * Method called whenever a peer disconnects.
4142 * @param cls closure
4143 * @param peer peer identity this notification is about
4146 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4148 struct MeshPeerInfo *pi;
4151 #if MESH_DEBUG_CONNECTION
4152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4154 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4160 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4162 /* TODO: notify that the transmission failed */
4163 peer_info_cancel_transmission(pi, i);
4165 path_remove_from_peer (pi, pi->id, myid);
4166 #if MESH_DEBUG_CONNECTION
4169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4176 /******************************************************************************/
4177 /************************ MAIN FUNCTIONS ****************************/
4178 /******************************************************************************/
4181 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4183 * @param cls closure
4184 * @param key current key code
4185 * @param value value in the hash map
4186 * @return GNUNET_YES if we should continue to iterate,
4190 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4192 struct MeshTunnel *t = value;
4198 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4200 * @param cls closure
4201 * @param key current key code
4202 * @param value value in the hash map
4203 * @return GNUNET_YES if we should continue to iterate,
4207 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4209 struct MeshPeerInfo *p = value;
4210 peer_info_destroy (p);
4215 * Task run during shutdown.
4221 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4224 /* TODO: destroy tunnels? */
4225 if (core_handle != NULL)
4227 GNUNET_CORE_disconnect (core_handle);
4230 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4231 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4232 if (dht_handle != NULL)
4234 GNUNET_DHT_disconnect (dht_handle);
4239 GNUNET_SERVER_notification_context_destroy (nc);
4242 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4244 GNUNET_SCHEDULER_cancel (announce_id_task);
4245 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4251 * Process mesh requests.
4253 * @param cls closure
4254 * @param server the initialized server
4255 * @param c configuration to use
4258 run (void *cls, struct GNUNET_SERVER_Handle *server,
4259 const struct GNUNET_CONFIGURATION_Handle *c)
4261 struct MeshPeerInfo *peer;
4262 struct MeshPeerPath *p;
4265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4266 server_handle = server;
4267 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4268 CORE_QUEUE_SIZE, /* queue size */
4269 NULL, /* Closure passed to MESH functions */
4270 &core_init, /* Call core_init once connected */
4271 &core_connect, /* Handle connects */
4272 &core_disconnect, /* remove peers on disconnects */
4273 NULL, /* Don't notify about all incoming messages */
4274 GNUNET_NO, /* For header only in notification */
4275 NULL, /* Don't notify about all outbound messages */
4276 GNUNET_NO, /* For header-only out notification */
4277 core_handlers); /* Register these handlers */
4278 if (core_handle == NULL)
4281 GNUNET_SCHEDULER_shutdown ();
4286 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4289 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4291 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4292 GNUNET_SCHEDULER_shutdown ();
4295 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4296 GNUNET_free (keyfile);
4297 if (my_private_key == NULL)
4299 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4300 _("Mesh service could not access hostkey. Exiting.\n"));
4301 GNUNET_SCHEDULER_shutdown ();
4304 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4305 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4306 &my_full_id.hashPubKey);
4307 myid = GNUNET_PEER_intern (&my_full_id);
4309 dht_handle = GNUNET_DHT_connect (c, 64);
4310 if (dht_handle == NULL)
4316 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4318 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4319 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4320 peers = GNUNET_CONTAINER_multihashmap_create (32);
4321 applications = GNUNET_CONTAINER_multihashmap_create (32);
4322 types = GNUNET_CONTAINER_multihashmap_create (32);
4324 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4325 nc = GNUNET_SERVER_notification_context_create (server_handle,
4327 GNUNET_SERVER_disconnect_notify (server_handle,
4328 &handle_local_client_disconnect,
4333 clients_tail = NULL;
4338 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4339 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4341 /* Create a peer_info for the local peer */
4342 peer = peer_info_get(&my_full_id);
4345 path_add_to_peer(peer, p);
4347 /* Scheduled the task to clean up when shutdown is called */
4348 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4355 * The main function for the mesh service.
4357 * @param argc number of arguments from the command line
4358 * @param argv command line arguments
4359 * @return 0 ok, 1 on error
4362 main (int argc, char *const *argv)
4366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4369 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");