2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - relay corking down to core
48 #include "mesh_protocol.h"
49 #include "gnunet_dht_service.h"
50 #include "mesh_tunnel_tree.h"
52 /* TODO: move into configuration file */
53 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
54 GNUNET_TIME_UNIT_SECONDS,\
56 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
57 GNUNET_TIME_UNIT_SECONDS,\
60 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
61 GNUNET_TIME_UNIT_SECONDS,\
64 #define GET_RESTART_TIME GNUNET_TIME_relative_multiply(\
65 GNUNET_TIME_UNIT_SECONDS,\
68 #define UNACKNOWLEDGED_WAIT GNUNET_TIME_relative_multiply(\
69 GNUNET_TIME_UNIT_SECONDS,\
72 /******************************************************************************/
73 /************************ DATA STRUCTURES ****************************/
74 /******************************************************************************/
76 /** FWD declaration */
80 * Struct containing all info possibly needed to build a package when called
83 struct MeshDataDescriptor
85 /** ID of the tunnel this packet travels in */
86 struct MESH_TunnelID *origin;
91 /** Client that asked for the transmission, if any */
92 struct GNUNET_SERVER_Client *client;
94 /** Who was this message being sent to */
95 struct MeshPeerInfo *peer;
97 /** Ultimate destination of the packet */
98 GNUNET_PEER_Id destination;
100 /** Number of identical messages sent to different hops (multicast) */
101 unsigned int *copies;
103 /** Which handler was used to request the transmission */
104 unsigned int handler_n;
106 /** Size of the data */
109 /** Used to allow a client send more traffic to the service after a
110 * previous packet was tried to be sent to a neighbor and couldn't */
111 GNUNET_SCHEDULER_TaskIdentifier *timeout_task;
116 * Struct containing all information regarding a given peer
126 * Last time we heard from this peer
128 struct GNUNET_TIME_Absolute last_contact;
131 * Number of attempts to reconnect so far
133 int n_reconnect_attempts;
136 * Paths to reach the peer, ordered by ascending hop count
138 struct MeshPeerPath *path_head;
141 * Paths to reach the peer, ordered by ascending hop count
143 struct MeshPeerPath *path_tail;
146 * Handle to stop the DHT search for a path to this peer
148 struct GNUNET_DHT_GetHandle *dhtget;
151 * Closure given to the DHT GET
153 struct MeshPathInfo *dhtgetcls;
156 * Handles to stop queued transmissions for this peer
158 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
161 * Pointer to info stuctures used as cls for queued transmissions
163 void *infos[CORE_QUEUE_SIZE];
166 * Type of message being in each transmission
168 uint16_t types[CORE_QUEUE_SIZE];
171 * Array of tunnels this peer participates in
172 * (most probably a small amount, therefore not a hashmap)
173 * When the path to the peer changes, notify these tunnels to let them
174 * re-adjust their path trees.
176 struct MeshTunnel **tunnels;
179 * Number of tunnels this peers participates in
181 unsigned int ntunnels;
186 * Data scheduled to transmit (to local client or remote peer)
193 struct MeshQueue *next;
194 struct MeshQueue *prev;
197 * Target of the data (NULL if target is client)
199 struct MeshPeerInfo *peer;
202 * Client to send the data to (NULL if target is peer)
204 struct MeshClient *client;
207 * Size of the message to transmit
212 * How old is the data?
214 struct GNUNET_TIME_Absolute timestamp;
219 struct GNUNET_MessageHeader *data;
223 * Globally unique tunnel identification (owner + number)
224 * DO NOT USE OVER THE NETWORK
229 * Node that owns the tunnel
234 * Tunnel number to differentiate all the tunnels owned by the node oid
235 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
237 MESH_TunnelNumber tid;
241 struct MeshClient; /* FWD declaration */
244 * Struct containing all information regarding a tunnel
245 * For an intermediate node the improtant info used will be:
246 * - id Tunnel unique identification
247 * - paths[0] To know where to send it next
248 * - metainfo: ready, speeds, accounting
255 struct MESH_TunnelID id;
258 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
260 MESH_TunnelNumber local_tid;
263 * Last time the tunnel was used
265 struct GNUNET_TIME_Absolute timestamp;
268 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
269 * containing peers added by id or by type, not intermediate peers.
271 struct GNUNET_CONTAINER_MultiHashMap *peers;
274 * Number of peers that are connected and potentially ready to receive data
276 unsigned int peers_ready;
279 * Number of peers that have been added to the tunnel
281 unsigned int peers_total;
284 * Client owner of the tunnel, if any
286 struct MeshClient *client;
289 * Messages ready to transmit
291 struct MeshQueue *queue_head;
292 struct MeshQueue *queue_tail;
297 struct MeshTunnelTree *tree;
300 * Application type we are looking for in this tunnel
302 GNUNET_MESH_ApplicationType type;
305 * Used to search peers offering a service
307 struct GNUNET_DHT_GetHandle *dht_get_type;
310 * Task to keep the used paths alive
312 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
315 * Task to destroy the tunnel after timeout
317 * FIXME: merge the two? a tunnel will have either
318 * a path refresh OR a timeout, never both!
320 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
325 * Info needed to work with tunnel paths and peers
332 struct MeshTunnel *t;
335 * Neighbouring peer to whom we send the packet to
337 struct MeshPeerInfo *peer;
342 struct MeshPeerPath *path;
345 * Position in peer's transmit queue
352 * Struct containing information about a client of the service
359 struct MeshClient *next;
360 struct MeshClient *prev;
363 * Tunnels that belong to this client, indexed by local id
365 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
368 * Handle to communicate with the client
370 struct GNUNET_SERVER_Client *handle;
373 * Applications that this client has claimed to provide
375 struct GNUNET_CONTAINER_MultiHashMap *apps;
378 * Messages that this client has declared interest in
380 struct GNUNET_CONTAINER_MultiHashMap *types;
384 * ID of the client, for debug messages
393 /******************************************************************************/
394 /************************ DEBUG FUNCTIONS ****************************/
395 /******************************************************************************/
399 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
400 * @param cls string to print
401 * @param tc task context
404 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
408 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
416 /******************************************************************************/
417 /*********************** GLOBAL VARIABLES ****************************/
418 /******************************************************************************/
423 static struct MeshClient *clients;
424 static struct MeshClient *clients_tail;
427 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
429 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
432 * Tunnels incoming, indexed by MESH_TunnelNumber
433 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
435 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
438 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
440 static struct GNUNET_CONTAINER_MultiHashMap *peers;
443 * Handle to communicate with core
445 static struct GNUNET_CORE_Handle *core_handle;
450 static struct GNUNET_DHT_Handle *dht_handle;
455 static struct GNUNET_SERVER_Handle *server_handle;
458 * Notification context, to send messages to local clients
460 static struct GNUNET_SERVER_NotificationContext *nc;
463 * Local peer own ID (memory efficient handle)
465 static GNUNET_PEER_Id myid;
468 * Local peer own ID (full value)
470 static struct GNUNET_PeerIdentity my_full_id;
475 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
480 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
483 * Tunnel ID for the next created tunnel (global tunnel number)
485 static MESH_TunnelNumber next_tid;
488 * Tunnel ID for the next incoming tunnel (local tunnel number)
490 static MESH_TunnelNumber next_local_tid;
493 * All application types provided by this peer
495 static struct GNUNET_CONTAINER_MultiHashMap *applications;
498 * All message types clients of this peer are interested in
500 static struct GNUNET_CONTAINER_MultiHashMap *types;
503 * Task to periodically announce provided applications
505 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
508 * Task to periodically announce itself in the network
510 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
513 unsigned int next_client_id;
517 /******************************************************************************/
518 /************************ ITERATORS ****************************/
519 /******************************************************************************/
521 /* FIXME move iterators here */
524 /******************************************************************************/
525 /************************ PERIODIC FUNCTIONS ****************************/
526 /******************************************************************************/
529 * Announce iterator over for each application provided by the peer
532 * @param key current key code
533 * @param value value in the hash map
534 * @return GNUNET_YES if we should continue to
539 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
541 /* FIXME are hashes in multihash map equal on all aquitectures? */
542 GNUNET_DHT_put (dht_handle,
545 GNUNET_DHT_RO_RECORD_ROUTE |
546 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
547 GNUNET_BLOCK_TYPE_TEST,
548 sizeof (struct GNUNET_PeerIdentity),
549 (const char *) &my_full_id,
551 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
552 &mesh_debug, "DHT_put for app completed");
554 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
556 APP_ANNOUNCE_TIME, NULL, NULL);
563 * Periodically announce what applications are provided by local clients
566 * @param tc task context
569 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
571 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
573 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
577 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
579 announce_applications_task =
580 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
588 * Periodically announce self id in the DHT
591 * @param tc task context
594 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
596 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
598 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
602 * - Set data expiration in function of X
605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
606 GNUNET_i2s (&my_full_id));
607 GNUNET_DHT_put (dht_handle, /* DHT handle */
608 &my_full_id.hashPubKey, /* Key to use */
609 10U, /* Replication level */
610 GNUNET_DHT_RO_RECORD_ROUTE |
611 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
612 GNUNET_BLOCK_TYPE_TEST, /* Block type */
613 sizeof(my_full_id), /* Size of the data */
614 (char *)&my_full_id, /* Data itself */
615 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
616 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
618 &mesh_debug, "DHT_put for id completed");
620 NULL, /* Continuation */
621 NULL); /* Continuation closure */
624 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
629 * Function to process paths received for a new peer addition. The recorded
630 * paths form the initial tunnel, which can be optimized later.
631 * Called on each result obtained for the DHT search.
634 * @param exp when will this value expire
635 * @param key key of the result
636 * @param type type of the result
637 * @param size number of bytes in data
638 * @param data pointer to the result data
641 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
642 const GNUNET_HashCode * key,
643 const struct GNUNET_PeerIdentity *get_path,
644 unsigned int get_path_length,
645 const struct GNUNET_PeerIdentity *put_path,
646 unsigned int put_path_length,
647 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
650 /******************************************************************************/
651 /****************** GENERAL HELPER FUNCTIONS ************************/
652 /******************************************************************************/
655 * Check if client has registered with the service and has not disconnected
657 * @param client the client to check
659 * @return non-NULL if client exists in the global DLL
661 static struct MeshClient *
662 client_get (struct GNUNET_SERVER_Client *client)
664 struct MeshClient *c;
669 if (c->handle == client)
678 * Checks if a given client has subscribed to certain message type
680 * @param message_type Type of message to check
681 * @param c Client to check
683 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
688 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
692 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
693 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
698 * Allow a client to send more data after transmitting a multicast message
699 * which some neighbor has not yet accepted altough a reasonable time has
702 * @param cls Closure (DataDescriptor containing the task identifier)
703 * @param tc Task Context
706 client_allow_send(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
708 struct MeshDataDescriptor *info = cls;
710 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
714 "MESH: CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
717 *(info->timeout_task) = GNUNET_SCHEDULER_NO_TASK;
718 GNUNET_SERVER_receive_done(info->client, GNUNET_OK);
723 * Search for a tunnel by global ID using full PeerIdentities
725 * @param oid owner of the tunnel
726 * @param tid global tunnel number
728 * @return tunnel handler, NULL if doesn't exist
730 static struct MeshTunnel *
731 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
735 * Notify a tunnel that a connection has broken that affects at least
738 * @param t Tunnel affected.
739 * @param p1 Peer that got disconnected from p2.
740 * @param p2 Peer that got disconnected from p1.
742 * @return Short ID of the peer disconnected (either p1 or p2).
743 * 0 if the tunnel remained unaffected.
745 static GNUNET_PEER_Id
746 tunnel_notify_connection_broken (struct MeshTunnel *t,
752 * Send the message to all clients that have subscribed to its type
754 * @param msg Pointer to the message itself
755 * @return number of clients this message was sent to
758 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
759 const struct GNUNET_MessageHeader *payload)
761 struct GNUNET_PeerIdentity *oid;
762 struct MeshClient *c;
763 struct MeshTunnel *t;
764 MESH_TunnelNumber *tid;
767 char cbuf[htons(msg->size)];
769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Sending to clients...\n");
770 type = ntohs (payload->type);
771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message of type %u\n", type);
773 memcpy (cbuf, msg, sizeof(cbuf));
774 switch (htons(msg->type))
776 struct GNUNET_MESH_Unicast *uc;
777 struct GNUNET_MESH_Multicast *mc;
778 struct GNUNET_MESH_ToOrigin *to;
780 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
781 uc = (struct GNUNET_MESH_Unicast *) cbuf;
785 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
786 mc = (struct GNUNET_MESH_Multicast *) cbuf;
790 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
791 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
799 t = tunnel_get (oid, ntohl(*tid));
805 *tid = htonl (t->local_tid);
806 for (count = 0, c = clients; c != NULL; c = c->next)
808 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client %u\n", c->id);
809 if (client_is_subscribed (type, c))
812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending\n");
813 GNUNET_SERVER_notification_context_unicast (
816 (struct GNUNET_MessageHeader *) cbuf,
825 * Notify the client that owns the tunnel that a peer has connected to it
826 * (the requested path to it has been confirmed).
828 * @param t Tunnel whose owner to notify
829 * @param id Short id of the peer that has connected
832 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
834 struct GNUNET_MESH_PeerControl pc;
836 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
837 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
838 pc.tunnel_id = htonl (t->local_tid);
839 GNUNET_PEER_resolve (id, &pc.peer);
840 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
841 &pc.header, GNUNET_NO);
846 * Notify all clients (not depending on registration status) that the incoming
847 * tunnel is no longer valid.
849 * @param t Tunnel that was destroyed.
852 send_clients_tunnel_destroy (struct MeshTunnel *t)
854 struct GNUNET_MESH_TunnelMessage msg;
856 msg.header.size = htons (sizeof (msg));
857 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
858 msg.tunnel_id = htonl (t->local_tid);
859 GNUNET_SERVER_notification_context_broadcast(nc, &msg.header, GNUNET_NO);
864 * Function called to notify a client about the socket
865 * being ready to queue more data. "buf" will be
866 * NULL and "size" zero if the socket was closed for
867 * writing in the meantime.
870 * @param size number of bytes available in buf
871 * @param buf where the callee should write the message
872 * @return number of bytes written to buf
875 send_core_create_path (void *cls, size_t size, void *buf);
879 * Function called to notify a client about the socket
880 * being ready to queue more data. "buf" will be
881 * NULL and "size" zero if the socket was closed for
882 * writing in the meantime.
884 * @param cls closure (data itself)
885 * @param size number of bytes available in buf
886 * @param buf where the callee should write the message
888 * @return number of bytes written to buf
891 send_core_data_multicast (void *cls, size_t size, void *buf);
895 * Decrements the reference counter and frees all resources if needed
897 * @param dd Data Descriptor used in a multicast message
900 data_descriptor_decrement_multicast (struct MeshDataDescriptor *dd)
902 if (0 == --(*(dd->copies)))
904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
905 if (NULL != dd->client)
907 if (GNUNET_SCHEDULER_NO_TASK != *(dd->timeout_task))
909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
910 "MESH: cancelling client timeout (%u)...\n",
911 *(dd->timeout_task));
912 GNUNET_SCHEDULER_cancel(*(dd->timeout_task));
913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
914 GNUNET_SERVER_receive_done (dd->client, GNUNET_OK);
916 GNUNET_free (dd->timeout_task);
918 GNUNET_free (dd->copies);
919 GNUNET_free (dd->data);
925 * Cancel a core transmission that was already requested and free all resources
926 * associated to the request.
928 * @param peer PeeInfo of the peer whose transmission is cancelled.
929 * @param i Position of the transmission to be cancelled.
932 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
934 if (NULL != peer->core_transmit[i])
936 struct MeshDataDescriptor *dd;
937 struct MeshPathInfo *path_info;
941 struct GNUNET_PeerIdentity id;
943 GNUNET_PEER_resolve (peer->id, &id);
944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
945 "MESH: Cancelling data transmission at %s [%u]\n",
948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
949 "MESH: message type %u\n",
953 /* TODO: notify that tranmission has failed */
954 switch (peer->types[i])
956 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
957 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
958 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
959 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
961 data_descriptor_decrement_multicast (dd);
963 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
965 path_info = peer->infos[i];
966 path_destroy(path_info->path);
970 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
972 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
973 peer->core_transmit[i] = NULL;
974 GNUNET_free (peer->infos[i]);
980 * Get a unused CORE slot to transmit a message to a peer. If all the slots
981 * are used, cancel one and return it's position.
983 * @param peer PeerInfo of the neighbor we want to transmit to.
985 * @return The index of an available slot to transmit to the neighbor.
988 peer_info_transmit_slot (struct MeshPeerInfo *peer)
992 for (i = 0; peer->core_transmit[i]; i++)
994 if (i == (CORE_QUEUE_SIZE - 1))
996 /* All positions are taken! Overwriting! */
998 peer_info_cancel_transmission(peer, 0);
1007 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1008 * and insert it in the appropiate structures if the peer is not known yet.
1010 * @param peer Full identity of the peer.
1012 * @return Existing or newly created peer info.
1014 static struct MeshPeerInfo *
1015 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1017 struct MeshPeerInfo *peer_info;
1019 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1020 if (NULL == peer_info)
1023 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1024 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1025 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1026 peer_info->id = GNUNET_PEER_intern (peer);
1034 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1035 * and insert it in the appropiate structures if the peer is not known yet.
1037 * @param peer Short identity of the peer.
1039 * @return Existing or newly created peer info.
1041 static struct MeshPeerInfo *
1042 peer_info_get_short (const GNUNET_PEER_Id peer)
1044 struct GNUNET_PeerIdentity id;
1046 GNUNET_PEER_resolve(peer, &id);
1047 return peer_info_get(&id);
1052 * Iterator to remove the tunnel from the list of tunnels a peer participates
1055 * @param cls Closure (tunnel info)
1056 * @param key GNUNET_PeerIdentity of the peer (unused)
1057 * @param value PeerInfo of the peer
1059 * @return always GNUNET_YES, to keep iterating
1062 peer_info_delete_tunnel (void* cls, const GNUNET_HashCode* key, void* value)
1064 struct MeshTunnel *t = cls;
1065 struct MeshPeerInfo *peer = value;
1068 for (i = 0; i < peer->ntunnels; i++)
1070 if (0 == memcmp(&peer->tunnels[i]->id,
1072 sizeof(struct MESH_TunnelID)))
1075 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1076 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1085 * Core callback to write a
1087 * @param cls Closure (MeshDataDescriptor with data in "data" member).
1088 * @param size Number of bytes available in buf.
1089 * @param buf Where the to write the message.
1091 * @return number of bytes written to buf
1094 send_core_data_raw (void *cls, size_t size, void *buf)
1096 struct MeshDataDescriptor *info = cls;
1097 struct GNUNET_MessageHeader *msg;
1100 GNUNET_assert (NULL != info);
1101 GNUNET_assert (NULL != info->data);
1102 msg = (struct GNUNET_MessageHeader *) info->data;
1103 total_size = ntohs (msg->size);
1105 if (total_size > size)
1107 struct GNUNET_PeerIdentity id;
1109 GNUNET_PEER_resolve (info->peer->id, &id);
1110 info->peer->core_transmit[info->handler_n] =
1111 GNUNET_CORE_notify_transmit_ready(core_handle,
1114 GNUNET_TIME_UNIT_FOREVER_REL,
1117 &send_core_data_raw,
1121 info->peer->core_transmit[info->handler_n] = NULL;
1122 memcpy (buf, msg, total_size);
1123 GNUNET_free (info->data);
1130 * Sends an already built message to a peer, properly registrating
1131 * all used resources.
1133 * @param message Message to send.
1134 * @param peer Short ID of the neighbor whom to send the message.
1137 send_message (const struct GNUNET_MessageHeader *message,
1138 const struct GNUNET_PeerIdentity *peer)
1140 struct MeshDataDescriptor *info;
1141 struct MeshPeerInfo *neighbor;
1145 size = ntohs (message->size);
1146 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1147 info->data = GNUNET_malloc (size);
1148 memcpy (info->data, message, size);
1149 neighbor = peer_info_get (peer);
1150 i = peer_info_transmit_slot (neighbor);
1151 info->handler_n = i;
1152 info->peer = neighbor;
1153 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1154 neighbor->infos[i] = info;
1155 neighbor->core_transmit[i] =
1156 GNUNET_CORE_notify_transmit_ready(core_handle,
1159 GNUNET_TIME_UNIT_FOREVER_REL,
1162 &send_core_data_raw,
1169 * Sends a CREATE PATH message for a path to a peer, properly registrating
1170 * all used resources.
1172 * @param peer PeerInfo of the final peer for whom this path is being created.
1173 * @param p Path itself.
1174 * @param t Tunnel for which the path is created.
1177 send_create_path (struct MeshPeerInfo *peer,
1178 struct MeshPeerPath *p,
1179 struct MeshTunnel *t)
1181 struct GNUNET_PeerIdentity id;
1182 struct MeshPathInfo *path_info;
1183 struct MeshPeerInfo *neighbor;
1188 p = tree_get_path_to_peer(t->tree, peer->id);
1195 for (i = 0; i < p->length; i++)
1197 if (p->peers[i] == myid)
1200 if (i >= p->length - 1)
1206 GNUNET_PEER_resolve(p->peers[i + 1], &id);
1208 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1209 path_info->path = p;
1211 neighbor = peer_info_get(&id);
1212 path_info->peer = neighbor;
1213 path_info->pos = peer_info_transmit_slot(neighbor);
1214 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1215 neighbor->infos[path_info->pos] = path_info;
1216 neighbor->core_transmit[path_info->pos] =
1217 GNUNET_CORE_notify_transmit_ready (
1218 core_handle, /* handle */
1221 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1223 sizeof (struct GNUNET_MESH_ManipulatePath)
1224 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1225 &send_core_create_path, /* callback */
1226 path_info); /* cls */
1231 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1233 * @param t Tunnel whose path to destroy.
1234 * @param destination Short ID of the peer to whom the path to destroy.
1237 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1239 struct GNUNET_MESH_ManipulatePath *msg;
1240 struct GNUNET_PeerIdentity *pi;
1241 struct MeshPeerPath *p;
1245 p = tree_get_path_to_peer(t->tree, destination);
1251 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1252 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1253 msg = GNUNET_malloc (size);
1254 msg->header.size = htons (size);
1255 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1256 msg->tid = htonl (t->id.tid);
1257 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1258 for (i = 0; i < p->length; i++)
1260 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1262 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1268 * Try to establish a new connection to this peer.
1269 * Use the best path for the given tunnel.
1270 * If the peer doesn't have any path to it yet, try to get one.
1271 * If the peer already has some path, send a CREATE PATH towards it.
1273 * @param peer PeerInfo of the peer.
1274 * @param t Tunnel for which to create the path, if possible.
1277 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1279 struct MeshPeerPath *p;
1280 struct MeshPathInfo *path_info;
1282 if (NULL != peer->path_head)
1284 p = tree_get_path_to_peer(t->tree, peer->id);
1287 send_create_path(peer, p, t);
1292 send_client_peer_connected(t, myid);
1295 else if (NULL == peer->dhtget)
1297 struct GNUNET_PeerIdentity id;
1299 GNUNET_PEER_resolve(peer->id, &id);
1300 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1301 path_info->peer = peer;
1303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1304 "MESH: Starting DHT GET for peer %s\n",
1306 peer->dhtgetcls = path_info;
1308 GNUNET_DHT_get_start(dht_handle, /* handle */
1309 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1310 GNUNET_BLOCK_TYPE_TEST, /* type */
1311 &id.hashPubKey, /* key to search */
1312 4, /* replication level */
1313 GNUNET_DHT_RO_RECORD_ROUTE |
1314 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1316 0, /* xquery bits */
1317 &dht_get_id_handler,
1320 /* Otherwise, there is no path but the DHT get is already started. */
1325 * Destroy the peer_info and free any allocated resources linked to it
1327 * @param pi The peer_info to destroy.
1329 * @return GNUNET_OK on success
1332 peer_info_destroy (struct MeshPeerInfo *pi)
1334 struct GNUNET_PeerIdentity id;
1335 struct MeshPeerPath *p;
1336 struct MeshPeerPath *nextp;
1339 GNUNET_PEER_resolve (pi->id, &id);
1340 GNUNET_PEER_change_rc (pi->id, -1);
1343 GNUNET_CONTAINER_multihashmap_remove (peers,&id.hashPubKey, pi))
1346 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1347 "MESH: removing peer %s, not in hashmap\n",
1350 if (NULL != pi->dhtget)
1352 GNUNET_DHT_get_stop(pi->dhtget);
1353 GNUNET_free (pi->dhtgetcls);
1355 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1357 peer_info_cancel_transmission(pi, i);
1363 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1373 * Remove all paths that rely on a direct connection between p1 and p2
1374 * from the peer itself and notify all tunnels about it.
1376 * @param peer PeerInfo of affected peer.
1377 * @param p1 GNUNET_PEER_Id of one peer.
1378 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1381 * TODO: optimize (see below)
1384 path_remove_from_peer (struct MeshPeerInfo *peer,
1388 struct MeshPeerPath *p;
1389 struct MeshPeerPath *aux;
1390 struct MeshPeerInfo *peer_d;
1392 unsigned int destroyed;
1398 p = peer->path_head;
1402 for (i = 0; i < (p->length - 1); i++)
1404 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1405 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1407 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1418 for (i = 0; i < peer->ntunnels; i++)
1420 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1422 * Problem: one or more peers have been deleted from the tunnel tree.
1423 * We don't know who they are to try to add them again.
1424 * We need to try to find a new path for each of the disconnected peers.
1425 * Some of them might already have a path to reach them that does not
1426 * involve p1 and p2. Adding all anew might render in a better tree than
1427 * the trivial immediate fix.
1429 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1430 * its children will be reachable trough him.
1432 peer_d = peer_info_get_short(d);
1435 for (p = peer_d->path_head; NULL != p; p = p->next)
1437 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1445 /* No callback, as peer will be already disconnected */
1446 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1450 peer_info_connect (peer_d, peer->tunnels[i]);
1457 * Add the path to the peer and update the path used to reach it in case this
1460 * @param peer_info Destination peer to add the path to.
1461 * @param path New path to add. Last peer must be the peer in arg 1.
1462 * Path will be either used of freed if already known.
1464 * TODO: trim the part from origin to us? Add it as path to origin?
1467 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1469 struct MeshPeerPath *aux;
1474 struct GNUNET_PeerIdentity id;
1476 GNUNET_PEER_resolve (peer_info->id, &id);
1477 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1478 "MESH: adding path [%u] to peer %s\n",
1482 if (NULL == peer_info || NULL == path)
1485 path_destroy (path);
1489 l = path_get_length (path);
1496 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1498 l2 = path_get_length (aux);
1501 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1502 peer_info->path_tail,
1509 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1516 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1517 peer_info->path_tail,
1524 * Add the path to the origin peer and update the path used to reach it in case
1525 * this is the shortest.
1526 * The path is given in peer_info -> destination, therefore we turn the path
1527 * upside down first.
1529 * @param peer_info Peer to add the path to, being the origin of the path.
1530 * @param path New path to add after being inversed.
1533 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1536 path_add_to_peer (peer_info, path);
1541 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1542 * to obtain a local peer -> destination path and interning the peer ids.
1544 * @return Newly allocated and created path
1546 static struct MeshPeerPath *
1547 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1548 unsigned int get_path_length,
1549 const struct GNUNET_PeerIdentity *put_path,
1550 unsigned int put_path_length)
1552 struct MeshPeerPath *p;
1558 GNUNET_PEER_change_rc(myid, 1);
1559 i = get_path_length;
1560 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1561 for (i--; i >= 0; i--)
1563 id = GNUNET_PEER_intern (&get_path[i]);
1564 if (p->length > 0 && id == p->peers[p->length - 1])
1566 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1567 GNUNET_PEER_change_rc(id, -1);
1571 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1572 "MESH: Adding from GET: %s.\n",
1573 GNUNET_i2s(&get_path[i]));
1575 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1576 p->peers[p->length - 1] = id;
1579 i = put_path_length;
1580 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1581 for (i--; i >= 0; i--)
1583 id = GNUNET_PEER_intern (&put_path[i]);
1586 /* PUT path went through us, so discard the path up until now and start
1587 * from here to get a much shorter (and loop-free) path.
1592 if (p->length > 0 && id == p->peers[p->length - 1])
1594 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1595 GNUNET_PEER_change_rc(id, -1);
1599 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1600 "MESH: Adding from PUT: %s.\n",
1601 GNUNET_i2s(&put_path[i]));
1603 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1604 p->peers[p->length - 1] = id;
1608 if (get_path_length > 0)
1609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1610 "MESH: (first of GET: %s)\n",
1611 GNUNET_i2s(&get_path[0]));
1612 if (put_path_length > 0)
1613 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1614 "MESH: (first of PUT: %s)\n",
1615 GNUNET_i2s(&put_path[0]));
1616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1617 "MESH: In total: %d hops\n",
1619 for (i = 0; i < p->length; i++)
1621 struct GNUNET_PeerIdentity peer_id;
1623 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1627 GNUNET_i2s(&peer_id));
1635 * Send keepalive packets for a peer
1637 * @param cls Closure (tunnel for which to send the keepalive).
1638 * @param tc Notification context.
1640 * TODO: implement explicit multicast keepalive?
1643 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1647 * Search for a tunnel among the tunnels for a client
1649 * @param c the client whose tunnels to search in
1650 * @param tid the local id of the tunnel
1652 * @return tunnel handler, NULL if doesn't exist
1654 static struct MeshTunnel *
1655 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1657 GNUNET_HashCode hash;
1659 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1660 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1662 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1664 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1669 * Search for a tunnel by global ID using PEER_ID
1671 * @param pi owner of the tunnel
1672 * @param tid global tunnel number
1674 * @return tunnel handler, NULL if doesn't exist
1676 static struct MeshTunnel *
1677 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1679 struct MESH_TunnelID id;
1680 GNUNET_HashCode hash;
1685 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1686 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1691 * Search for a tunnel by global ID using full PeerIdentities
1693 * @param oid owner of the tunnel
1694 * @param tid global tunnel number
1696 * @return tunnel handler, NULL if doesn't exist
1698 static struct MeshTunnel *
1699 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1701 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1706 * Callback used to notify a client owner of a tunnel that a peer has
1707 * disconnected, most likely because of a path change.
1709 * @param n Node in the tree representing the disconnected peer
1711 * FIXME: pass tunnel via cls, make param just a peer identity
1714 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1716 struct MeshPeerInfo *peer;
1718 if (NULL != n->t->client && NULL != nc)
1720 struct GNUNET_MESH_PeerControl msg;
1721 msg.header.size = htons (sizeof (msg));
1722 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1723 msg.tunnel_id = htonl (n->t->local_tid);
1724 GNUNET_PEER_resolve (n->peer, &msg.peer);
1725 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1726 &msg.header, GNUNET_NO);
1728 peer = peer_info_get_short(n->peer);
1729 peer_info_connect(peer, n->t);
1734 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1735 * needed rescources.
1736 * If peer already exists, reevaluate shortest path and change if different.
1738 * @param t Tunnel we want to add a new peer to
1739 * @param peer PeerInfo of the peer being added
1743 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1745 struct GNUNET_PeerIdentity id;
1746 struct MeshPeerPath *best_p;
1747 struct MeshPeerPath *p;
1748 unsigned int best_cost;
1751 GNUNET_PEER_resolve(peer->id, &id);
1753 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1756 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1757 GNUNET_CONTAINER_multihashmap_put(
1761 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1764 if (NULL != (p = peer->path_head))
1767 best_cost = path_get_cost(t->tree, p);
1770 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1777 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1778 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1779 t->path_refresh_task =
1780 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1784 /* Start a DHT get if necessary */
1785 peer_info_connect(peer, t);
1790 * Add a path to a tunnel which we don't own, just to remember the next hop.
1791 * If destination node was already in the tunnel, the first hop information
1792 * will be replaced with the new path.
1794 * @param t Tunnel we want to add a new peer to
1795 * @param p Path to add
1796 * @param own_pos Position of local node in path.
1800 tunnel_add_path (struct MeshTunnel *t,
1801 struct MeshPeerPath *p,
1802 unsigned int own_pos)
1804 struct GNUNET_PeerIdentity id;
1806 GNUNET_assert (0 != own_pos);
1807 tree_add_path(t->tree, p, NULL);
1808 if (NULL == t->tree->me)
1809 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1810 if (own_pos < p->length - 1)
1812 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1813 tree_update_first_hops(t->tree, t->tree->me, &id);
1819 * Notifies a tunnel that a connection has broken that affects at least
1820 * some of its peers. Sends a notification towards the root of the tree.
1821 * In case the peer is the owner of the tree, notifies the client that owns
1822 * the tunnel and tries to reconnect.
1824 * @param t Tunnel affected.
1825 * @param p1 Peer that got disconnected from p2.
1826 * @param p2 Peer that got disconnected from p1.
1828 * @return Short ID of the peer disconnected (either p1 or p2).
1829 * 0 if the tunnel remained unaffected.
1831 static GNUNET_PEER_Id
1832 tunnel_notify_connection_broken (struct MeshTunnel *t,
1838 pid = tree_notify_connection_broken (t->tree,
1841 ¬ify_peer_disconnected);
1842 if (myid != p1 && myid != p2)
1848 if (NULL != t->tree->me->parent)
1850 /* We are the peer still connected, notify owner of the disconnection. */
1851 struct GNUNET_MESH_PathBroken msg;
1852 struct GNUNET_PeerIdentity neighbor;
1854 msg.header.size = htons (sizeof (msg));
1855 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1856 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1857 msg.tid = htonl (t->id.tid);
1858 msg.peer1 = my_full_id;
1859 GNUNET_PEER_resolve (pid, &msg.peer2);
1860 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1861 send_message (&msg.header, &neighbor);
1869 * Send a message in a tunnel in multicast, sending a copy to each child node
1870 * down the local one in the tunnel tree.
1872 * @param t Tunnel in which to send the data.
1873 * @param msg Message to be sent
1875 * @return Number of copies sent.
1877 * TODO: unifiy shared resources and reference counter management
1880 tunnel_send_multicast (struct MeshTunnel *t,
1881 const struct GNUNET_MessageHeader *msg)
1883 struct GNUNET_PeerIdentity neighbor;
1884 struct MeshDataDescriptor *info;
1885 struct MeshTunnelTreeNode *n;
1886 struct MeshTunnelTreeNode *counter;
1887 GNUNET_SCHEDULER_TaskIdentifier *task;
1888 unsigned int *copies;
1893 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1894 "MESH: sending a multicast packet...\n");
1895 size = ntohs (msg->size);
1896 GNUNET_assert (NULL != t->tree->me);
1897 n = t->tree->me->children_head;
1900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1901 "MESH: no children in the tree, no one to send.\n");
1904 copies = GNUNET_malloc (sizeof (unsigned int));
1905 for (counter = n; NULL != counter; counter = counter->next)
1907 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1908 data = GNUNET_malloc (size);
1909 memcpy (data, msg, size);
1910 if (NULL != t->client)
1912 task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
1913 *task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1918 task = NULL; // So GCC shuts up about task being potentially uninitialized
1921 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1924 info->copies = copies;
1925 if (NULL != t->client)
1927 info->client = t->client->handle;
1928 info->timeout_task = task;
1930 info->destination = n->peer;
1931 GNUNET_PEER_resolve (n->peer, &neighbor);
1932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1933 "MESH: sending to %s...\n",
1934 GNUNET_i2s (&neighbor));
1935 info->peer = peer_info_get(&neighbor);
1936 GNUNET_assert (NULL != info->peer);
1937 i = peer_info_transmit_slot(info->peer);
1938 info->handler_n = i;
1939 info->peer->infos[i] = info;
1940 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1941 info->peer->core_transmit[i] =
1942 GNUNET_CORE_notify_transmit_ready (core_handle,
1945 GNUNET_TIME_UNIT_FOREVER_REL,
1948 &send_core_data_multicast, info);
1956 * Send a message to all peers in this tunnel that the tunnel is no longer
1959 * @param t The tunnel whose peers to notify.
1962 tunnel_send_destroy (struct MeshTunnel *t)
1964 struct GNUNET_MESH_TunnelDestroy msg;
1966 msg.header.size = htons (sizeof (msg));
1967 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
1968 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1969 msg.tid = htonl (t->id.tid);
1970 tunnel_send_multicast (t, &msg.header);
1976 * Destroy the tunnel and free any allocated resources linked to it
1978 * @param t the tunnel to destroy
1980 * @return GNUNET_OK on success
1983 tunnel_destroy (struct MeshTunnel *t)
1985 struct MeshClient *c;
1986 struct MeshQueue *q;
1987 struct MeshQueue *qn;
1988 GNUNET_HashCode hash;
1997 struct GNUNET_PeerIdentity id;
1999 GNUNET_PEER_resolve(t->id.oid, &id);
2000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2001 "MESH: destroying tunnel %s [%x]\n",
2005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2009 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2010 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2015 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2017 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2021 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2023 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2024 GNUNET_break (GNUNET_YES ==
2025 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2028 if (NULL != t->peers)
2030 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2031 &peer_info_delete_tunnel, t);
2032 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2037 if (NULL != q->data)
2038 GNUNET_free (q->data);
2042 /* TODO cancel core transmit ready in case it was active */
2044 tree_destroy(t->tree);
2045 if (NULL != t->dht_get_type)
2046 GNUNET_DHT_get_stop(t->dht_get_type);
2047 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2048 GNUNET_SCHEDULER_cancel(t->timeout_task);
2049 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2050 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2057 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2058 * that are no longer needed, as well as nodes of no longer reachable peers.
2059 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2061 * @param t Tunnel from which to remove the path.
2062 * @param p Peer which should be removed.
2065 tunnel_delete_peer (struct MeshTunnel *t,
2066 GNUNET_PEER_Id peer)
2068 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2069 if (NULL == t->tree->root)
2075 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2076 * client when the client disconnects.
2078 * @param cls closure (client that is disconnecting)
2079 * @param key the hash of the local tunnel id (used to access the hashmap)
2080 * @param value the value stored at the key (tunnel to destroy)
2082 * @return GNUNET_OK on success
2085 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2087 struct MeshTunnel *t = value;
2090 if (NULL != t->dht_get_type)
2092 GNUNET_DHT_get_stop (t->dht_get_type);
2094 r = tunnel_destroy (t);
2100 * Timeout function, destroys tunnel if called
2102 * @param cls Closure (tunnel to destroy).
2103 * @param tc TaskContext
2106 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2108 struct MeshTunnel *t = cls;
2110 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2112 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2117 * Resets the tunnel timeout. Starts it if no timeout was running.
2119 * @param t Tunnel whose timeout to reset.
2122 tunnel_reset_timeout (struct MeshTunnel *t)
2124 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2125 GNUNET_SCHEDULER_cancel (t->timeout_task);
2126 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2127 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2133 /******************************************************************************/
2134 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2135 /******************************************************************************/
2138 * Function called to notify a client about the socket
2139 * being ready to queue more data. "buf" will be
2140 * NULL and "size" zero if the socket was closed for
2141 * writing in the meantime.
2143 * @param cls closure
2144 * @param size number of bytes available in buf
2145 * @param buf where the callee should write the message
2146 * @return number of bytes written to buf
2149 send_core_create_path (void *cls, size_t size, void *buf)
2151 struct MeshPathInfo *info = cls;
2152 struct GNUNET_MESH_ManipulatePath *msg;
2153 struct GNUNET_PeerIdentity *peer_ptr;
2154 struct MeshPeerInfo *peer = info->peer;
2155 struct MeshTunnel *t = info->t;
2156 struct MeshPeerPath *p = info->path;
2160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2161 "MESH: CREATE PATH sending...\n");
2163 sizeof (struct GNUNET_MESH_ManipulatePath) +
2164 p->length * sizeof (struct GNUNET_PeerIdentity);
2166 if (size < size_needed || NULL == buf)
2168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2170 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2172 info->peer->core_transmit[info->pos] =
2173 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2174 GNUNET_TIME_UNIT_FOREVER_REL,
2175 path_get_first_hop (t->tree, peer->id),
2177 &send_core_create_path,
2181 info->peer->core_transmit[info->pos] = NULL;
2184 struct GNUNET_PeerIdentity id;
2186 GNUNET_PEER_resolve (peer->id, &id);
2187 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2188 "MESH: setting core_transmit %s [%u] to NULL\n",
2193 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2194 msg->header.size = htons (size_needed);
2195 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2196 msg->tid = ntohl (t->id.tid);
2198 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2199 for (i = 0; i < p->length; i++)
2201 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2208 "MESH: CREATE PATH (%u bytes long) sent!\n",
2215 * Function called to notify a client about the socket
2216 * being ready to queue more data. "buf" will be
2217 * NULL and "size" zero if the socket was closed for
2218 * writing in the meantime.
2220 * @param cls closure (data itself)
2221 * @param size number of bytes available in buf
2222 * @param buf where the callee should write the message
2224 * @return number of bytes written to buf
2227 send_core_data_multicast (void *cls, size_t size, void *buf)
2229 struct MeshDataDescriptor *info = cls;
2232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2233 GNUNET_assert (NULL != info);
2234 GNUNET_assert (NULL != info->peer);
2235 total_size = info->size;
2236 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2238 if (total_size > size)
2241 struct GNUNET_PeerIdentity id;
2243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2244 "MESH: Multicast: retransmitting... (%u/%u)\n",
2246 GNUNET_PEER_resolve(info->peer->id, &id);
2247 info->peer->core_transmit[info->handler_n] =
2248 GNUNET_CORE_notify_transmit_ready (core_handle,
2251 GNUNET_TIME_UNIT_FOREVER_REL,
2254 &send_core_data_multicast,
2258 info->peer->core_transmit[info->handler_n] = NULL;
2259 info->peer->infos[info->handler_n] = NULL;
2260 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2261 memcpy (buf, info->data, total_size);
2264 struct GNUNET_MESH_Multicast *mc;
2265 struct GNUNET_MessageHeader *mh;
2268 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2270 mc = (struct GNUNET_MESH_Multicast *) mh;
2271 mh = (struct GNUNET_MessageHeader *) &mc[1];
2272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2273 "MESH: multicast, payload type %u\n",
2275 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2276 "MESH: multicast, payload size %u\n",
2281 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2287 data_descriptor_decrement_multicast (info);
2288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2290 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2296 * Function called to notify a client about the socket
2297 * being ready to queue more data. "buf" will be
2298 * NULL and "size" zero if the socket was closed for
2299 * writing in the meantime.
2301 * @param cls closure (MeshDataDescriptor)
2302 * @param size number of bytes available in buf
2303 * @param buf where the callee should write the message
2304 * @return number of bytes written to buf
2307 send_core_path_ack (void *cls, size_t size, void *buf)
2309 struct MeshDataDescriptor *info = cls;
2310 struct GNUNET_MESH_PathACK *msg = buf;
2312 GNUNET_assert (NULL != info);
2315 info->peer->core_transmit[info->handler_n] = NULL;
2317 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2322 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2323 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2324 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2325 msg->tid = htonl (info->origin->tid);
2326 msg->peer_id = my_full_id;
2328 /* TODO add signature */
2330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2331 return sizeof (struct GNUNET_MESH_PathACK);
2335 /******************************************************************************/
2336 /******************** MESH NETWORK HANDLERS **************************/
2337 /******************************************************************************/
2341 * Core handler for path creation
2343 * @param cls closure
2344 * @param message message
2345 * @param peer peer identity this notification is about
2346 * @param atsi performance data
2347 * @param atsi_count number of records in 'atsi'
2349 * @return GNUNET_OK to keep the connection open,
2350 * GNUNET_SYSERR to close it (signal serious error)
2353 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2354 const struct GNUNET_MessageHeader *message,
2355 const struct GNUNET_ATS_Information *atsi,
2356 unsigned int atsi_count)
2358 unsigned int own_pos;
2361 MESH_TunnelNumber tid;
2362 struct GNUNET_MESH_ManipulatePath *msg;
2363 struct GNUNET_PeerIdentity *pi;
2364 GNUNET_HashCode hash;
2365 struct MeshPeerPath *path;
2366 struct MeshPeerInfo *dest_peer_info;
2367 struct MeshPeerInfo *orig_peer_info;
2368 struct MeshTunnel *t;
2370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2371 "MESH: Received a path create msg [%s]\n",
2372 GNUNET_i2s(&my_full_id));
2373 size = ntohs (message->size);
2374 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2376 GNUNET_break_op (0);
2380 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2381 if (size % sizeof (struct GNUNET_PeerIdentity))
2383 GNUNET_break_op (0);
2386 size /= sizeof (struct GNUNET_PeerIdentity);
2389 GNUNET_break_op (0);
2392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2393 "MESH: path has %u hops.\n",
2395 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2397 tid = ntohl (msg->tid);
2398 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2399 t = tunnel_get (pi, tid);
2400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2401 "MESH: path is for tunnel %s [%X].\n",
2406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2407 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2408 t->id.oid = GNUNET_PEER_intern (pi);
2410 t->local_tid = next_local_tid++;
2411 /* FIXME test if taken */
2412 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2413 t->tree = tree_new(t, t->id.oid);
2415 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2417 GNUNET_CONTAINER_multihashmap_put (
2421 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2427 tunnel_reset_timeout (t);
2428 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2430 GNUNET_CONTAINER_multihashmap_put (
2434 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2442 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2443 if (NULL == dest_peer_info)
2445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2446 "MESH: Creating PeerInfo for destination.\n");
2447 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2448 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2449 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2451 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2453 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2454 if (NULL == orig_peer_info)
2456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2457 "MESH: Creating PeerInfo for origin.\n");
2458 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2459 orig_peer_info->id = GNUNET_PEER_intern (pi);
2460 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2461 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2464 path = path_new (size);
2466 for (i = 0; i < size; i++)
2468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2469 "MESH: ... adding %s\n",
2470 GNUNET_i2s(&pi[i]));
2471 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2472 if (path->peers[i] == myid)
2475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2476 "MESH: Own position: %u\n", own_pos);
2479 /* cannot be self, must be 'not found' */
2480 /* create path: self not found in path through self */
2481 GNUNET_break_op (0);
2482 path_destroy (path);
2483 /* FIXME error. destroy tunnel? leave for timeout? */
2486 tunnel_add_path (t, path, own_pos);
2487 if (own_pos == size - 1)
2489 /* It is for us! Send ack. */
2490 struct GNUNET_MESH_TunnelNotification cmsg;
2491 struct MeshDataDescriptor *info;
2494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2495 "MESH: It's for us!\n");
2496 path_add_to_origin (orig_peer_info, path);
2497 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2498 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2500 &my_full_id.hashPubKey,
2501 peer_info_get(&my_full_id),
2502 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2503 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2504 info->origin = &t->id;
2505 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2506 GNUNET_assert (NULL != info->peer);
2507 j = peer_info_transmit_slot(info->peer);
2508 info->handler_n = j;
2509 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2510 info->peer->infos[j] = info;
2511 info->peer->core_transmit[j] =
2512 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2513 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2514 sizeof (struct GNUNET_MESH_PathACK),
2515 &send_core_path_ack, info);
2516 cmsg.header.size = htons(sizeof(cmsg));
2517 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2518 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2519 cmsg.tunnel_id = htonl(t->local_tid);
2520 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2524 struct MeshPeerPath *path2;
2526 /* It's for somebody else! Retransmit. */
2527 path2 = path_duplicate(path);
2528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2529 "MESH: Retransmitting.\n");
2530 path_add_to_peer(dest_peer_info, path);
2531 path = path_duplicate(path2);
2532 path_add_to_origin(orig_peer_info, path2);
2533 send_create_path(dest_peer_info, path, t);
2540 * Core handler for path destruction
2542 * @param cls closure
2543 * @param message message
2544 * @param peer peer identity this notification is about
2545 * @param atsi performance data
2546 * @param atsi_count number of records in 'atsi'
2548 * @return GNUNET_OK to keep the connection open,
2549 * GNUNET_SYSERR to close it (signal serious error)
2552 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2553 const struct GNUNET_MessageHeader *message,
2554 const struct GNUNET_ATS_Information *atsi,
2555 unsigned int atsi_count)
2557 struct GNUNET_MESH_ManipulatePath *msg;
2558 struct GNUNET_PeerIdentity *pi;
2559 struct MeshPeerPath *path;
2560 struct MeshTunnel *t;
2561 unsigned int own_pos;
2565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2566 "MESH: Received a PATH DESTROY msg from %s\n",
2568 size = ntohs (message->size);
2569 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2571 GNUNET_break_op (0);
2575 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2576 if (size % sizeof (struct GNUNET_PeerIdentity))
2578 GNUNET_break_op (0);
2581 size /= sizeof (struct GNUNET_PeerIdentity);
2584 GNUNET_break_op (0);
2587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2588 "MESH: path has %u hops.\n",
2591 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2592 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2594 "MESH: path is for tunnel %s [%X].\n",
2597 t = tunnel_get (pi, ntohl (msg->tid));
2600 /* TODO notify back: we don't know this tunnel */
2601 GNUNET_break_op (0);
2604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2605 path = path_new (size);
2607 for (i = 0; i < size; i++)
2609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2610 "MESH: ... adding %s\n",
2611 GNUNET_i2s(&pi[i]));
2612 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2613 if (path->peers[i] == myid)
2616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2617 "MESH: Own position: %u\n", own_pos);
2618 if (own_pos < path->length - 1)
2619 send_message (message, &pi[own_pos + 1]);
2620 tunnel_delete_peer (t, path->peers[path->length - 1]);
2626 * Core handler for notifications of broken paths
2628 * @param cls closure
2629 * @param message message
2630 * @param peer peer identity this notification is about
2631 * @param atsi performance data
2632 * @param atsi_count number of records in 'atsi'
2634 * @return GNUNET_OK to keep the connection open,
2635 * GNUNET_SYSERR to close it (signal serious error)
2638 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2639 const struct GNUNET_MessageHeader *message,
2640 const struct GNUNET_ATS_Information *atsi,
2641 unsigned int atsi_count)
2643 struct GNUNET_MESH_PathBroken *msg;
2644 struct MeshTunnel *t;
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2647 "MESH: Received a PATH BROKEN msg from %s\n",
2649 msg = (struct GNUNET_MESH_PathBroken *) message;
2650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2651 "MESH: regarding %s\n",
2652 GNUNET_i2s(&msg->peer1));
2653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2654 "MESH: regarding %s\n",
2655 GNUNET_i2s(&msg->peer2));
2656 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2659 GNUNET_break_op (0);
2662 tunnel_notify_connection_broken(t,
2663 GNUNET_PEER_search(&msg->peer1),
2664 GNUNET_PEER_search(&msg->peer2));
2671 * Core handler for tunnel destruction
2673 * @param cls closure
2674 * @param message message
2675 * @param peer peer identity this notification is about
2676 * @param atsi performance data
2677 * @param atsi_count number of records in 'atsi'
2679 * @return GNUNET_OK to keep the connection open,
2680 * GNUNET_SYSERR to close it (signal serious error)
2683 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2684 const struct GNUNET_MessageHeader *message,
2685 const struct GNUNET_ATS_Information *atsi,
2686 unsigned int atsi_count)
2688 struct GNUNET_MESH_TunnelDestroy *msg;
2689 struct MeshTunnel *t;
2691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2692 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2694 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2696 "MESH: for tunnel %s [%u]\n",
2697 GNUNET_i2s (&msg->oid),
2699 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2702 /* Probably already got the message from another path,
2703 * destroyed the tunnel and retransmitted to children.
2708 if (t->id.oid == myid)
2710 GNUNET_break_op (0);
2713 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2715 /* Tunnel was incoming, notify clients */
2716 send_clients_tunnel_destroy (t);
2718 tunnel_send_destroy (t);
2725 * Core handler for mesh network traffic going from the origin to a peer
2727 * @param cls closure
2728 * @param peer peer identity this notification is about
2729 * @param message message
2730 * @param atsi performance data
2731 * @param atsi_count number of records in 'atsi'
2732 * @return GNUNET_OK to keep the connection open,
2733 * GNUNET_SYSERR to close it (signal serious error)
2736 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2737 const struct GNUNET_MessageHeader *message,
2738 const struct GNUNET_ATS_Information *atsi,
2739 unsigned int atsi_count)
2741 struct GNUNET_MESH_Unicast *msg;
2742 struct MeshTunnel *t;
2746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2747 "MESH: got a unicast packet from %s\n",
2749 size = ntohs (message->size);
2751 sizeof (struct GNUNET_MESH_Unicast) +
2752 sizeof (struct GNUNET_MessageHeader))
2757 msg = (struct GNUNET_MESH_Unicast *) message;
2758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2759 "MESH: of type %u\n",
2760 ntohs (msg[1].header.type));
2761 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2764 /* TODO notify back: we don't know this tunnel */
2765 GNUNET_break_op (0);
2768 tunnel_reset_timeout (t);
2769 pid = GNUNET_PEER_search(&msg->destination);
2772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2773 "MESH: it's for us! sending to clients...\n");
2774 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2778 "MESH: not for us, retransmitting...\n");
2779 send_message (message, path_get_first_hop(t->tree, pid));
2785 * Core handler for mesh network traffic going from the origin to all peers
2787 * @param cls closure
2788 * @param message message
2789 * @param peer peer identity this notification is about
2790 * @param atsi performance data
2791 * @param atsi_count number of records in 'atsi'
2792 * @return GNUNET_OK to keep the connection open,
2793 * GNUNET_SYSERR to close it (signal serious error)
2795 * TODO: Check who we got this from, to validate route.
2798 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2799 const struct GNUNET_MessageHeader *message,
2800 const struct GNUNET_ATS_Information *atsi,
2801 unsigned int atsi_count)
2803 struct GNUNET_MESH_Multicast *msg;
2804 struct MeshTunnel *t;
2807 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2808 "MESH: got a multicast packet from %s\n",
2810 size = ntohs (message->size);
2811 if (sizeof (struct GNUNET_MESH_Multicast) +
2812 sizeof (struct GNUNET_MessageHeader) > size)
2814 GNUNET_break_op (0);
2817 msg = (struct GNUNET_MESH_Multicast *) message;
2818 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2822 /* TODO notify that we dont know that tunnel */
2823 GNUNET_break_op (0);
2826 tunnel_reset_timeout (t);
2828 /* Transmit to locally interested clients */
2829 if (NULL != t->peers &&
2830 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2832 send_subscribed_clients (message, &msg[1].header);
2834 tunnel_send_multicast(t, message);
2840 * Core handler for mesh network traffic toward the owner of a tunnel
2842 * @param cls closure
2843 * @param message message
2844 * @param peer peer identity this notification is about
2845 * @param atsi performance data
2846 * @param atsi_count number of records in 'atsi'
2848 * @return GNUNET_OK to keep the connection open,
2849 * GNUNET_SYSERR to close it (signal serious error)
2852 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2853 const struct GNUNET_MessageHeader *message,
2854 const struct GNUNET_ATS_Information *atsi,
2855 unsigned int atsi_count)
2857 struct GNUNET_MESH_ToOrigin *msg;
2858 struct GNUNET_PeerIdentity id;
2859 struct MeshPeerInfo *peer_info;
2860 struct MeshTunnel *t;
2863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2864 "MESH: got a ToOrigin packet from %s\n",
2866 size = ntohs (message->size);
2867 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2868 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2870 GNUNET_break_op (0);
2873 msg = (struct GNUNET_MESH_ToOrigin *) message;
2874 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2875 "MESH: of type %u\n",
2876 ntohs (msg[1].header.type));
2877 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2881 /* TODO notify that we dont know this tunnel (whom)? */
2882 GNUNET_break_op (0);
2886 if (t->id.oid == myid)
2889 struct GNUNET_MESH_ToOrigin *copy;
2891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2892 "MESH: it's for us! sending to clients...\n");
2893 if (NULL == t->client)
2895 /* got data packet for ownerless tunnel */
2896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2897 "MESH: no clients!\n");
2898 GNUNET_break_op (0);
2901 /* TODO signature verification */
2902 memcpy (cbuf, message, size);
2903 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2904 copy->tid = htonl (t->local_tid);
2905 GNUNET_SERVER_notification_context_unicast (nc,
2911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2912 "MESH: not for us, retransmitting...\n");
2914 peer_info = peer_info_get (&msg->oid);
2915 if (NULL == peer_info)
2917 /* unknown origin of tunnel */
2921 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2922 send_message (message, &id);
2929 * Core handler for path ACKs
2931 * @param cls closure
2932 * @param message message
2933 * @param peer peer identity this notification is about
2934 * @param atsi performance data
2935 * @param atsi_count number of records in 'atsi'
2937 * @return GNUNET_OK to keep the connection open,
2938 * GNUNET_SYSERR to close it (signal serious error)
2941 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2942 const struct GNUNET_MessageHeader *message,
2943 const struct GNUNET_ATS_Information *atsi,
2944 unsigned int atsi_count)
2946 struct GNUNET_MESH_PathACK *msg;
2947 struct GNUNET_PeerIdentity id;
2948 struct MeshTunnelTreeNode *n;
2949 struct MeshPeerInfo *peer_info;
2950 struct MeshTunnel *t;
2952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2953 "MESH: Received a path ACK msg [%s]\n",
2954 GNUNET_i2s(&my_full_id));
2955 msg = (struct GNUNET_MESH_PathACK *) message;
2956 t = tunnel_get (&msg->oid, msg->tid);
2959 /* TODO notify that we don't know the tunnel */
2963 /* Message for us? */
2964 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2967 if (NULL == t->client)
2969 GNUNET_break_op (0);
2972 if (NULL != t->dht_get_type)
2974 GNUNET_DHT_get_stop (t->dht_get_type);
2975 t->dht_get_type = NULL;
2977 peer_info = peer_info_get (&msg->peer_id);
2978 n = tree_find_peer(t->tree->root, peer_info->id);
2981 GNUNET_break_op (0);
2984 n->status = MESH_PEER_READY;
2985 send_client_peer_connected(t, peer_info->id);
2989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2990 "MESH: not for us, retransmitting...\n");
2991 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2992 peer_info = peer_info_get (&msg->oid);
2993 if (NULL == peer_info)
2995 /* If we know the tunnel, we should DEFINITELY know the peer */
2999 send_message (message, &id);
3005 * Functions to handle messages from core
3007 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3008 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3009 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3010 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3011 sizeof (struct GNUNET_MESH_PathBroken)},
3012 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3013 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3014 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3015 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3016 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3017 sizeof (struct GNUNET_MESH_PathACK)},
3023 /******************************************************************************/
3024 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3025 /******************************************************************************/
3028 * deregister_app: iterator for removing each application registered by a client
3030 * @param cls closure
3031 * @param key the hash of the application id (used to access the hashmap)
3032 * @param value the value stored at the key (client)
3034 * @return GNUNET_OK on success
3037 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3039 GNUNET_break (GNUNET_YES ==
3040 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3046 * notify_client_connection_failure: notify a client that the connection to the
3047 * requested remote peer is not possible (for instance, no route found)
3048 * Function called when the socket is ready to queue more data. "buf" will be
3049 * NULL and "size" zero if the socket was closed for writing in the meantime.
3051 * @param cls closure
3052 * @param size number of bytes available in buf
3053 * @param buf where the callee should write the message
3054 * @return number of bytes written to buf
3057 notify_client_connection_failure (void *cls, size_t size, void *buf)
3060 struct MeshPeerInfo *peer_info;
3061 struct GNUNET_MESH_PeerControl *msg;
3062 struct GNUNET_PeerIdentity id;
3064 if (0 == size && NULL == buf)
3066 // TODO retry? cancel?
3070 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3071 peer_info = (struct MeshPeerInfo *) cls;
3072 msg = (struct GNUNET_MESH_PeerControl *) buf;
3073 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3074 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3075 // msg->tunnel_id = htonl(peer_info->t->tid);
3076 GNUNET_PEER_resolve (peer_info->id, &id);
3077 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3085 * Send keepalive packets for a peer
3087 * @param cls Closure (tunnel for which to send the keepalive).
3088 * @param tc Notification context.
3090 * TODO: implement explicit multicast keepalive?
3093 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3095 struct MeshTunnel *t = cls;
3096 struct GNUNET_MessageHeader *payload;
3097 struct GNUNET_MESH_Multicast *msg;
3098 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3099 sizeof(struct GNUNET_MessageHeader);
3102 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3106 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3109 "MESH: sending keepalive for tunnel %d\n",
3112 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3113 msg->header.size = htons (size);
3114 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3115 msg->oid = my_full_id;
3116 msg->tid = htonl(t->id.tid);
3117 payload = (struct GNUNET_MessageHeader *) &msg[1];
3118 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3119 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3120 tunnel_send_multicast (t, &msg->header);
3122 t->path_refresh_task =
3123 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3129 * Function to process paths received for a new peer addition. The recorded
3130 * paths form the initial tunnel, which can be optimized later.
3131 * Called on each result obtained for the DHT search.
3133 * @param cls closure
3134 * @param exp when will this value expire
3135 * @param key key of the result
3136 * @param type type of the result
3137 * @param size number of bytes in data
3138 * @param data pointer to the result data
3140 * TODO: re-issue the request after certain time? cancel after X results?
3143 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3144 const GNUNET_HashCode * key,
3145 const struct GNUNET_PeerIdentity *get_path,
3146 unsigned int get_path_length,
3147 const struct GNUNET_PeerIdentity *put_path,
3148 unsigned int put_path_length,
3149 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3151 struct MeshPathInfo *path_info = cls;
3152 struct MeshPeerPath *p;
3153 struct GNUNET_PeerIdentity pi;
3156 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3157 "MESH: Got results from DHT!\n");
3158 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3159 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3162 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3163 // path_info->peer->dhtget = NULL;
3165 p = path_build_from_dht (get_path, get_path_length,
3166 put_path, put_path_length);
3167 path_add_to_peer (path_info->peer, p);
3168 for (i = 0; i < path_info->peer->ntunnels; i++)
3170 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3171 peer_info_connect(path_info->peer, path_info->t);
3173 // GNUNET_free (path_info);
3180 * Function to process paths received for a new peer addition. The recorded
3181 * paths form the initial tunnel, which can be optimized later.
3182 * Called on each result obtained for the DHT search.
3184 * @param cls closure
3185 * @param exp when will this value expire
3186 * @param key key of the result
3187 * @param type type of the result
3188 * @param size number of bytes in data
3189 * @param data pointer to the result data
3192 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3193 const GNUNET_HashCode * key,
3194 const struct GNUNET_PeerIdentity *get_path,
3195 unsigned int get_path_length,
3196 const struct GNUNET_PeerIdentity *put_path,
3197 unsigned int put_path_length,
3198 enum GNUNET_BLOCK_Type type, size_t size,
3201 const struct GNUNET_PeerIdentity *pi = data;
3202 struct MeshTunnel *t = cls;
3203 struct MeshPeerInfo *peer_info;
3204 struct MeshPeerPath *p;
3206 if (size != sizeof (struct GNUNET_PeerIdentity))
3208 GNUNET_break_op (0);
3211 GNUNET_assert (NULL != t->client);
3212 peer_info = peer_info_get (pi);
3213 (void) GNUNET_CONTAINER_multihashmap_put (
3217 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3219 p = path_build_from_dht (get_path, get_path_length,
3220 put_path, put_path_length);
3221 path_add_to_peer (peer_info, p);
3222 tunnel_add_peer(t, peer_info);
3223 peer_info_connect (peer_info, t);
3227 /******************************************************************************/
3228 /********************* MESH LOCAL HANDLES **************************/
3229 /******************************************************************************/
3233 * Handler for client disconnection
3235 * @param cls closure
3236 * @param client identification of the client; NULL
3237 * for the last call when the server is destroyed
3240 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3242 struct MeshClient *c;
3243 struct MeshClient *next;
3245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3254 if (c->handle != client && NULL != client)
3256 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3260 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3261 GNUNET_SERVER_client_drop (c->handle);
3262 if (NULL != c->tunnels)
3264 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3265 &tunnel_destroy_iterator,
3267 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3270 /* deregister clients applications */
3271 if (NULL != c->apps)
3273 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3274 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3276 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3277 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3279 GNUNET_SCHEDULER_cancel (announce_applications_task);
3280 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3282 if (NULL != c->types)
3283 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3285 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3297 * Handler for new clients
3299 * @param cls closure
3300 * @param client identification of the client
3301 * @param message the actual message, which includes messages the client wants
3304 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3305 const struct GNUNET_MessageHeader *message)
3307 struct GNUNET_MESH_ClientConnect *cc_msg;
3308 struct MeshClient *c;
3309 GNUNET_MESH_ApplicationType *a;
3316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3317 /* Check data sanity */
3318 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3319 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3320 ntypes = ntohs (cc_msg->types);
3321 napps = ntohs (cc_msg->applications);
3323 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3326 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3330 /* Create new client structure */
3331 c = GNUNET_malloc (sizeof (struct MeshClient));
3333 c->id = next_client_id++;
3335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3337 GNUNET_SERVER_client_keep (client);
3338 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3341 GNUNET_MESH_ApplicationType at;
3344 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3345 for (i = 0; i < napps; i++)
3348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3349 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3350 /* store in clients hashmap */
3351 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3352 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3353 /* store in global hashmap, for announcements */
3354 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3355 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3357 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3358 announce_applications_task =
3359 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3367 t = (uint16_t *) & a[napps];
3368 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3369 for (i = 0; i < ntypes; i++)
3372 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3374 /* store in clients hashmap */
3375 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3376 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3377 /* store in global hashmap */
3378 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3379 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3382 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3383 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3385 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3386 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3387 GNUNET_SERVER_notification_context_add (nc, client);
3389 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3397 * Handler for requests of new tunnels
3399 * @param cls closure
3400 * @param client identification of the client
3401 * @param message the actual message
3404 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3405 const struct GNUNET_MessageHeader *message)
3407 struct GNUNET_MESH_TunnelMessage *t_msg;
3408 struct MeshTunnel *t;
3409 struct MeshClient *c;
3410 GNUNET_HashCode hash;
3412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3414 /* Sanity check for client registration */
3415 if (NULL == (c = client_get (client)))
3418 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3422 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3425 /* Message sanity check */
3426 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3429 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3433 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3434 /* Sanity check for tunnel numbering */
3435 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3438 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3441 /* Sanity check for duplicate tunnel IDs */
3442 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3445 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3449 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3450 while (NULL != tunnel_get_by_pi (myid, next_tid))
3451 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3452 t->id.tid = next_tid++;
3454 t->local_tid = ntohl (t_msg->tunnel_id);
3456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3457 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3458 GNUNET_i2s (&my_full_id),
3463 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3465 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3467 GNUNET_CONTAINER_multihashmap_put (
3468 c->tunnels, &hash, t,
3469 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3472 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3476 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3478 GNUNET_CONTAINER_multihashmap_put (
3480 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3483 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3486 t->tree = tree_new (t, myid);
3487 t->tree->refresh = REFRESH_PATH_TIME;
3488 t->tree->root->status = MESH_PEER_READY;
3489 t->tree->me = t->tree->root;
3491 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3497 * Handler for requests of deleting tunnels
3499 * @param cls closure
3500 * @param client identification of the client
3501 * @param message the actual message
3504 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3505 const struct GNUNET_MessageHeader *message)
3507 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3508 struct MeshClient *c;
3509 struct MeshTunnel *t;
3510 MESH_TunnelNumber tid;
3511 GNUNET_HashCode hash;
3513 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3514 "MESH: Got a DESTROY TUNNEL from client!\n");
3516 /* Sanity check for client registration */
3517 if (NULL == (c = client_get (client)))
3520 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3523 /* Message sanity check */
3524 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3527 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3533 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3535 /* Retrieve tunnel */
3536 tid = ntohl (tunnel_msg->tunnel_id);
3538 /* Remove from local id hashmap */
3539 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3540 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3541 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
3544 tunnel_send_destroy (t);
3546 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3552 * Handler for connection requests to new peers
3554 * @param cls closure
3555 * @param client identification of the client
3556 * @param message the actual message (PeerControl)
3559 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3560 const struct GNUNET_MessageHeader *message)
3562 struct GNUNET_MESH_PeerControl *peer_msg;
3563 struct MeshPeerInfo *peer_info;
3564 struct MeshClient *c;
3565 struct MeshTunnel *t;
3566 MESH_TunnelNumber tid;
3568 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3569 /* Sanity check for client registration */
3570 if (NULL == (c = client_get (client)))
3573 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3577 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3578 /* Sanity check for message size */
3579 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3582 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3586 /* Tunnel exists? */
3587 tid = ntohl (peer_msg->tunnel_id);
3588 t = tunnel_get_by_local_id (c, tid);
3592 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3596 /* Does client own tunnel? */
3597 if (t->client->handle != client)
3600 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3603 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3604 GNUNET_i2s(&peer_msg->peer));
3605 peer_info = peer_info_get (&peer_msg->peer);
3607 tunnel_add_peer(t, peer_info);
3608 peer_info_connect(peer_info, t);
3610 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3616 * Handler for disconnection requests of peers in a tunnel
3618 * @param cls closure
3619 * @param client identification of the client
3620 * @param message the actual message (PeerControl)
3623 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3624 const struct GNUNET_MessageHeader *message)
3626 struct GNUNET_MESH_PeerControl *peer_msg;
3627 struct MeshPeerInfo *peer_info;
3628 struct MeshClient *c;
3629 struct MeshTunnel *t;
3630 MESH_TunnelNumber tid;
3632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3633 /* Sanity check for client registration */
3634 if (NULL == (c = client_get (client)))
3637 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3640 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3641 /* Sanity check for message size */
3642 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3645 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3649 /* Tunnel exists? */
3650 tid = ntohl (peer_msg->tunnel_id);
3651 t = tunnel_get_by_local_id (c, tid);
3655 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3660 /* Does client own tunnel? */
3661 if (t->client->handle != client)
3664 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3668 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3669 "MESH: for peer %s\n",
3670 GNUNET_i2s(&peer_msg->peer));
3671 /* Is the peer in the tunnel? */
3672 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3673 &peer_msg->peer.hashPubKey);
3674 if (NULL == peer_info)
3677 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3681 /* Ok, delete peer from tunnel */
3682 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3683 &peer_msg->peer.hashPubKey);
3685 send_destroy_path (t, peer_info->id);
3686 tunnel_delete_peer(t, peer_info->id);
3687 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3693 * Handler for connection requests to new peers by type
3695 * @param cls closure
3696 * @param client identification of the client
3697 * @param message the actual message (ConnectPeerByType)
3700 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3701 const struct GNUNET_MessageHeader *message)
3703 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3704 struct MeshClient *c;
3705 struct MeshTunnel *t;
3706 GNUNET_HashCode hash;
3707 MESH_TunnelNumber tid;
3709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3710 /* Sanity check for client registration */
3711 if (NULL == (c = client_get (client)))
3714 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3718 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3719 /* Sanity check for message size */
3720 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3721 ntohs (connect_msg->header.size))
3724 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3728 /* Tunnel exists? */
3729 tid = ntohl (connect_msg->tunnel_id);
3730 t = tunnel_get_by_local_id (c, tid);
3734 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3738 /* Does client own tunnel? */
3739 if (t->client->handle != client)
3742 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3746 /* Do WE have the service? */
3747 t->type = ntohl (connect_msg->type);
3748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3749 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3750 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3753 /* Yes! Fast forward, add ourselves to the tunnel and send the
3754 * good news to the client
3756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3757 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3758 peer_info_get (&my_full_id),
3759 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3761 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3762 send_client_peer_connected(t, myid);
3763 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3764 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3767 /* Ok, lets find a peer offering the service */
3768 if (NULL != t->dht_get_type)
3770 GNUNET_DHT_get_stop (t->dht_get_type);
3772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3773 GNUNET_h2s (&hash));
3775 GNUNET_DHT_get_start (dht_handle,
3776 GNUNET_TIME_UNIT_FOREVER_REL,
3777 GNUNET_BLOCK_TYPE_TEST,
3780 GNUNET_DHT_RO_RECORD_ROUTE |
3781 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3783 &dht_get_type_handler, t);
3785 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3791 * Handler for client traffic directed to one peer
3793 * @param cls closure
3794 * @param client identification of the client
3795 * @param message the actual message
3798 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3799 const struct GNUNET_MessageHeader *message)
3801 struct MeshClient *c;
3802 struct MeshTunnel *t;
3803 struct MeshPeerInfo *pi;
3804 struct GNUNET_MESH_Unicast *data_msg;
3805 MESH_TunnelNumber tid;
3808 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3809 "MESH: Got a unicast request from a client!\n");
3811 /* Sanity check for client registration */
3812 if (NULL == (c = client_get (client)))
3815 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3818 data_msg = (struct GNUNET_MESH_Unicast *) message;
3819 /* Sanity check for message size */
3820 size = ntohs (message->size);
3821 if (sizeof (struct GNUNET_MESH_Unicast) +
3822 sizeof (struct GNUNET_MessageHeader) > size)
3825 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3829 /* Tunnel exists? */
3830 tid = ntohl (data_msg->tid);
3831 t = tunnel_get_by_local_id (c, tid);
3835 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3839 /* Is it a local tunnel? Then, does client own the tunnel? */
3840 if (NULL != t->client &&
3841 NULL != t->client->handle &&
3842 t->client->handle != client)
3845 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3849 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3850 &data_msg->destination.hashPubKey);
3851 /* Is the selected peer in the tunnel? */
3855 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3859 /* Ok, everything is correct, send the message
3860 * (pretend we got it from a mesh peer)
3863 char buf[ntohs (message->size)];
3864 struct GNUNET_MESH_Unicast *copy;
3866 /* Work around const limitation */
3867 copy = (struct GNUNET_MESH_Unicast *) buf;
3868 memcpy (buf, data_msg, size);
3869 copy->oid = my_full_id;
3870 copy->tid = htonl (t->id.tid);
3871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3872 "MESH: calling generic handler...\n");
3873 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3875 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3881 * Handler for client traffic directed to the origin
3883 * @param cls closure
3884 * @param client identification of the client
3885 * @param message the actual message
3888 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3889 const struct GNUNET_MessageHeader *message)
3891 struct GNUNET_MESH_ToOrigin *data_msg;
3892 struct GNUNET_PeerIdentity id;
3893 struct MeshClient *c;
3894 struct MeshTunnel *t;
3895 MESH_TunnelNumber tid;
3898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3899 "MESH: Got a ToOrigin request from a client!\n");
3901 /* Sanity check for client registration */
3902 if (NULL == (c = client_get (client)))
3905 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3908 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3909 /* Sanity check for message size */
3910 size = ntohs (message->size);
3911 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3912 sizeof (struct GNUNET_MessageHeader) > size)
3915 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3919 /* Tunnel exists? */
3920 tid = ntohl (data_msg->tid);
3921 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3924 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3927 t = tunnel_get_by_local_id (c, tid);
3931 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3935 /* It shouldn't be a local tunnel. */
3936 if (NULL != t->client)
3939 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3942 GNUNET_PEER_resolve(t->id.oid, &id);
3944 /* Ok, everything is correct, send the message
3945 * (pretend we got it from a mesh peer)
3948 char buf[ntohs (message->size)];
3949 struct GNUNET_MESH_ToOrigin *copy;
3951 /* Work around const limitation */
3952 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3953 memcpy (buf, data_msg, size);
3955 copy->tid = htonl (t->id.tid);
3956 copy->sender = my_full_id;
3957 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3958 "MESH: calling generic handler...\n");
3959 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3961 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3967 * Handler for client traffic directed to all peers in a tunnel
3969 * @param cls closure
3970 * @param client identification of the client
3971 * @param message the actual message
3974 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3975 const struct GNUNET_MessageHeader *message)
3977 struct MeshClient *c;
3978 struct MeshTunnel *t;
3979 struct GNUNET_MESH_Multicast *data_msg;
3980 MESH_TunnelNumber tid;
3982 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3983 "MESH: Got a multicast request from a client!\n");
3985 /* Sanity check for client registration */
3986 if (NULL == (c = client_get (client)))
3989 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3992 data_msg = (struct GNUNET_MESH_Multicast *) message;
3993 /* Sanity check for message size */
3994 if (sizeof (struct GNUNET_MESH_Multicast) +
3995 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
3998 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4002 /* Tunnel exists? */
4003 tid = ntohl (data_msg->tid);
4004 t = tunnel_get_by_local_id (c, tid);
4008 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4012 /* Does client own tunnel? */
4013 if (t->client->handle != client)
4016 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4021 char buf[ntohs(message->size)];
4022 struct GNUNET_MESH_Multicast *copy;
4024 copy = (struct GNUNET_MESH_Multicast *)buf;
4025 memcpy(buf, message, ntohs(message->size));
4026 copy->oid = my_full_id;
4027 copy->tid = htonl(t->id.tid);
4028 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4029 "MESH: calling generic handler...\n");
4030 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4033 /* receive done gets called when last copy is sent to a neighbor */
4038 * Functions to handle messages from clients
4040 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4041 {&handle_local_new_client, NULL,
4042 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4043 {&handle_local_tunnel_create, NULL,
4044 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4045 sizeof (struct GNUNET_MESH_TunnelMessage)},
4046 {&handle_local_tunnel_destroy, NULL,
4047 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4048 sizeof (struct GNUNET_MESH_TunnelMessage)},
4049 {&handle_local_connect_add, NULL,
4050 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4051 sizeof (struct GNUNET_MESH_PeerControl)},
4052 {&handle_local_connect_del, NULL,
4053 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4054 sizeof (struct GNUNET_MESH_PeerControl)},
4055 {&handle_local_connect_by_type, NULL,
4056 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4057 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4058 {&handle_local_unicast, NULL,
4059 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4060 {&handle_local_to_origin, NULL,
4061 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4062 {&handle_local_multicast, NULL,
4063 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4069 * To be called on core init/fail.
4071 * @param cls service closure
4072 * @param server handle to the server for this service
4073 * @param identity the public identity of this peer
4076 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4077 const struct GNUNET_PeerIdentity *identity)
4079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4080 core_handle = server;
4081 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4083 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4084 GNUNET_SCHEDULER_shutdown();
4090 * Method called whenever a given peer connects.
4092 * @param cls closure
4093 * @param peer peer identity this notification is about
4094 * @param atsi performance data for the connection
4095 * @param atsi_count number of records in 'atsi'
4098 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4099 const struct GNUNET_ATS_Information *atsi,
4100 unsigned int atsi_count)
4102 struct MeshPeerInfo *peer_info;
4103 struct MeshPeerPath *path;
4105 #if MESH_DEBUG_CONNECTION
4106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4108 GNUNET_i2s(&my_full_id));
4110 peer_info = peer_info_get (peer);
4111 if (myid == peer_info->id)
4113 #if MESH_DEBUG_CONNECTION
4114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4118 #if MESH_DEBUG_CONNECTION
4121 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4125 path = path_new (2);
4126 path->peers[0] = myid;
4127 path->peers[1] = peer_info->id;
4128 GNUNET_PEER_change_rc(myid, 1);
4129 GNUNET_PEER_change_rc(peer_info->id, 1);
4130 path_add_to_peer (peer_info, path);
4135 * Method called whenever a peer disconnects.
4137 * @param cls closure
4138 * @param peer peer identity this notification is about
4141 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4143 struct MeshPeerInfo *pi;
4146 #if MESH_DEBUG_CONNECTION
4147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4149 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4155 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4157 /* TODO: notify that the transmission failed */
4158 peer_info_cancel_transmission(pi, i);
4160 path_remove_from_peer (pi, pi->id, myid);
4161 #if MESH_DEBUG_CONNECTION
4164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4171 /******************************************************************************/
4172 /************************ MAIN FUNCTIONS ****************************/
4173 /******************************************************************************/
4176 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4178 * @param cls closure
4179 * @param key current key code
4180 * @param value value in the hash map
4181 * @return GNUNET_YES if we should continue to iterate,
4185 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4187 struct MeshTunnel *t = value;
4193 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4195 * @param cls closure
4196 * @param key current key code
4197 * @param value value in the hash map
4198 * @return GNUNET_YES if we should continue to iterate,
4202 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4204 struct MeshPeerInfo *p = value;
4205 peer_info_destroy (p);
4210 * Task run during shutdown.
4216 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4219 /* TODO: destroy tunnels? */
4220 if (core_handle != NULL)
4222 GNUNET_CORE_disconnect (core_handle);
4225 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4226 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4227 if (dht_handle != NULL)
4229 GNUNET_DHT_disconnect (dht_handle);
4234 GNUNET_SERVER_notification_context_destroy (nc);
4237 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4239 GNUNET_SCHEDULER_cancel (announce_id_task);
4240 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4246 * Process mesh requests.
4248 * @param cls closure
4249 * @param server the initialized server
4250 * @param c configuration to use
4253 run (void *cls, struct GNUNET_SERVER_Handle *server,
4254 const struct GNUNET_CONFIGURATION_Handle *c)
4256 struct MeshPeerInfo *peer;
4257 struct MeshPeerPath *p;
4260 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4261 server_handle = server;
4262 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4263 CORE_QUEUE_SIZE, /* queue size */
4264 NULL, /* Closure passed to MESH functions */
4265 &core_init, /* Call core_init once connected */
4266 &core_connect, /* Handle connects */
4267 &core_disconnect, /* remove peers on disconnects */
4268 NULL, /* Don't notify about all incoming messages */
4269 GNUNET_NO, /* For header only in notification */
4270 NULL, /* Don't notify about all outbound messages */
4271 GNUNET_NO, /* For header-only out notification */
4272 core_handlers); /* Register these handlers */
4273 if (core_handle == NULL)
4276 GNUNET_SCHEDULER_shutdown ();
4281 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4284 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4286 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4287 GNUNET_SCHEDULER_shutdown ();
4290 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4291 GNUNET_free (keyfile);
4292 if (my_private_key == NULL)
4294 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4295 _("Mesh service could not access hostkey. Exiting.\n"));
4296 GNUNET_SCHEDULER_shutdown ();
4299 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4300 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4301 &my_full_id.hashPubKey);
4302 myid = GNUNET_PEER_intern (&my_full_id);
4304 dht_handle = GNUNET_DHT_connect (c, 64);
4305 if (dht_handle == NULL)
4311 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4313 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4314 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4315 peers = GNUNET_CONTAINER_multihashmap_create (32);
4316 applications = GNUNET_CONTAINER_multihashmap_create (32);
4317 types = GNUNET_CONTAINER_multihashmap_create (32);
4319 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4320 nc = GNUNET_SERVER_notification_context_create (server_handle,
4322 GNUNET_SERVER_disconnect_notify (server_handle,
4323 &handle_local_client_disconnect,
4328 clients_tail = NULL;
4333 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4334 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4336 /* Create a peer_info for the local peer */
4337 peer = peer_info_get(&my_full_id);
4340 path_add_to_peer(peer, p);
4342 /* Scheduled the task to clean up when shutdown is called */
4343 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4350 * The main function for the mesh service.
4352 * @param argc number of arguments from the command line
4353 * @param argv command line arguments
4354 * @return 0 ok, 1 on error
4357 main (int argc, char *const *argv)
4361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4364 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");