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. Fucntion makes a copy of it.
1134 * @param peer Short ID of the neighbor whom to send the message.
1137 send_message (const struct GNUNET_MessageHeader *message,
1138 const struct GNUNET_PeerIdentity *peer)
1140 struct MeshDataDescriptor *info;
1141 struct MeshPeerInfo *neighbor;
1145 size = ntohs (message->size);
1146 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1147 info->data = GNUNET_malloc (size);
1148 memcpy (info->data, message, size);
1149 neighbor = peer_info_get (peer);
1150 i = peer_info_transmit_slot (neighbor);
1151 info->handler_n = i;
1152 info->peer = neighbor;
1153 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1154 neighbor->infos[i] = info;
1155 neighbor->core_transmit[i] =
1156 GNUNET_CORE_notify_transmit_ready(core_handle,
1159 GNUNET_TIME_UNIT_FOREVER_REL,
1162 &send_core_data_raw,
1169 * Sends a CREATE PATH message for a path to a peer, properly registrating
1170 * all used resources.
1172 * @param peer PeerInfo of the final peer for whom this path is being created.
1173 * @param p Path itself.
1174 * @param t Tunnel for which the path is created.
1177 send_create_path (struct MeshPeerInfo *peer,
1178 struct MeshPeerPath *p,
1179 struct MeshTunnel *t)
1181 struct GNUNET_PeerIdentity id;
1182 struct MeshPathInfo *path_info;
1183 struct MeshPeerInfo *neighbor;
1188 p = tree_get_path_to_peer(t->tree, peer->id);
1195 for (i = 0; i < p->length; i++)
1197 if (p->peers[i] == myid)
1200 if (i >= p->length - 1)
1206 GNUNET_PEER_resolve(p->peers[i + 1], &id);
1208 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1209 path_info->path = p;
1211 neighbor = peer_info_get(&id);
1212 path_info->peer = neighbor;
1213 path_info->pos = peer_info_transmit_slot(neighbor);
1214 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1215 neighbor->infos[path_info->pos] = path_info;
1216 neighbor->core_transmit[path_info->pos] =
1217 GNUNET_CORE_notify_transmit_ready (
1218 core_handle, /* handle */
1221 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1223 sizeof (struct GNUNET_MESH_ManipulatePath)
1224 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1225 &send_core_create_path, /* callback */
1226 path_info); /* cls */
1231 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1233 * @param t Tunnel whose path to destroy.
1234 * @param destination Short ID of the peer to whom the path to destroy.
1237 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1239 struct MeshPeerPath *p;
1242 p = tree_get_path_to_peer(t->tree, destination);
1248 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1249 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1251 struct GNUNET_MESH_ManipulatePath *msg;
1252 struct GNUNET_PeerIdentity *pi;
1256 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1257 msg->header.size = htons (size);
1258 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1259 msg->tid = htonl (t->id.tid);
1260 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1261 for (i = 0; i < p->length; i++)
1263 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1265 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1272 * Try to establish a new connection to this peer.
1273 * Use the best path for the given tunnel.
1274 * If the peer doesn't have any path to it yet, try to get one.
1275 * If the peer already has some path, send a CREATE PATH towards it.
1277 * @param peer PeerInfo of the peer.
1278 * @param t Tunnel for which to create the path, if possible.
1281 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1283 struct MeshPeerPath *p;
1284 struct MeshPathInfo *path_info;
1286 if (NULL != peer->path_head)
1288 p = tree_get_path_to_peer(t->tree, peer->id);
1297 send_create_path(peer, p, t);
1302 send_client_peer_connected(t, myid);
1305 else if (NULL == peer->dhtget)
1307 struct GNUNET_PeerIdentity id;
1309 GNUNET_PEER_resolve(peer->id, &id);
1310 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1311 path_info->peer = peer;
1313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1314 "MESH: Starting DHT GET for peer %s\n",
1316 peer->dhtgetcls = path_info;
1318 GNUNET_DHT_get_start(dht_handle, /* handle */
1319 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1320 GNUNET_BLOCK_TYPE_TEST, /* type */
1321 &id.hashPubKey, /* key to search */
1322 4, /* replication level */
1323 GNUNET_DHT_RO_RECORD_ROUTE |
1324 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1326 0, /* xquery bits */
1327 &dht_get_id_handler,
1330 /* Otherwise, there is no path but the DHT get is already started. */
1335 * Task to delay the connection of a peer
1337 * @param cls Closure (path info with tunnel and peer to connect).
1338 * Will be free'd on exection.
1339 * @param tc TaskContext
1342 peer_info_connect_task (void *cls,
1343 const struct GNUNET_SCHEDULER_TaskContext *tc)
1345 struct MeshPathInfo *path_info = cls;
1347 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
1351 peer_info_connect (path_info->peer, path_info->t);
1357 * Destroy the peer_info and free any allocated resources linked to it
1359 * @param pi The peer_info to destroy.
1361 * @return GNUNET_OK on success
1364 peer_info_destroy (struct MeshPeerInfo *pi)
1366 struct GNUNET_PeerIdentity id;
1367 struct MeshPeerPath *p;
1368 struct MeshPeerPath *nextp;
1371 GNUNET_PEER_resolve (pi->id, &id);
1372 GNUNET_PEER_change_rc (pi->id, -1);
1375 GNUNET_CONTAINER_multihashmap_remove (peers,&id.hashPubKey, pi))
1378 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1379 "MESH: removing peer %s, not in hashmap\n",
1382 if (NULL != pi->dhtget)
1384 GNUNET_DHT_get_stop(pi->dhtget);
1385 GNUNET_free (pi->dhtgetcls);
1387 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1389 peer_info_cancel_transmission(pi, i);
1395 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1405 * Remove all paths that rely on a direct connection between p1 and p2
1406 * from the peer itself and notify all tunnels about it.
1408 * @param peer PeerInfo of affected peer.
1409 * @param p1 GNUNET_PEER_Id of one peer.
1410 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1413 * TODO: optimize (see below)
1416 path_remove_from_peer (struct MeshPeerInfo *peer,
1420 struct MeshPeerPath *p;
1421 struct MeshPeerPath *aux;
1422 struct MeshPeerInfo *peer_d;
1424 unsigned int destroyed;
1430 p = peer->path_head;
1434 for (i = 0; i < (p->length - 1); i++)
1436 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1437 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1439 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1450 for (i = 0; i < peer->ntunnels; i++)
1452 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1454 * Problem: one or more peers have been deleted from the tunnel tree.
1455 * We don't know who they are to try to add them again.
1456 * We need to try to find a new path for each of the disconnected peers.
1457 * Some of them might already have a path to reach them that does not
1458 * involve p1 and p2. Adding all anew might render in a better tree than
1459 * the trivial immediate fix.
1461 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1462 * its children will be reachable trough him.
1464 peer_d = peer_info_get_short(d);
1467 for (p = peer_d->path_head; NULL != p; p = p->next)
1469 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1477 /* No callback, as peer will be already disconnected */
1478 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1482 peer_info_connect (peer_d, peer->tunnels[i]);
1489 * Add the path to the peer and update the path used to reach it in case this
1492 * @param peer_info Destination peer to add the path to.
1493 * @param path New path to add. Last peer must be the peer in arg 1.
1494 * Path will be either used of freed if already known.
1496 * TODO: trim the part from origin to us? Add it as path to origin?
1499 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1501 struct MeshPeerPath *aux;
1506 struct GNUNET_PeerIdentity id;
1508 GNUNET_PEER_resolve (peer_info->id, &id);
1509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1510 "MESH: adding path [%u] to peer %s\n",
1514 if (NULL == peer_info || NULL == path)
1517 path_destroy (path);
1521 l = path_get_length (path);
1528 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1530 l2 = path_get_length (aux);
1533 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1534 peer_info->path_tail,
1541 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1548 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1549 peer_info->path_tail,
1556 * Add the path to the origin peer and update the path used to reach it in case
1557 * this is the shortest.
1558 * The path is given in peer_info -> destination, therefore we turn the path
1559 * upside down first.
1561 * @param peer_info Peer to add the path to, being the origin of the path.
1562 * @param path New path to add after being inversed.
1565 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1568 path_add_to_peer (peer_info, path);
1573 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1574 * to obtain a local peer -> destination path and interning the peer ids.
1576 * @return Newly allocated and created path
1578 static struct MeshPeerPath *
1579 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1580 unsigned int get_path_length,
1581 const struct GNUNET_PeerIdentity *put_path,
1582 unsigned int put_path_length)
1584 struct MeshPeerPath *p;
1590 GNUNET_PEER_change_rc(myid, 1);
1591 i = get_path_length;
1592 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1593 for (i--; i >= 0; i--)
1595 id = GNUNET_PEER_intern (&get_path[i]);
1596 if (p->length > 0 && id == p->peers[p->length - 1])
1598 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1599 GNUNET_PEER_change_rc(id, -1);
1603 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1604 "MESH: Adding from GET: %s.\n",
1605 GNUNET_i2s(&get_path[i]));
1607 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1608 p->peers[p->length - 1] = id;
1611 i = put_path_length;
1612 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1613 for (i--; i >= 0; i--)
1615 id = GNUNET_PEER_intern (&put_path[i]);
1618 /* PUT path went through us, so discard the path up until now and start
1619 * from here to get a much shorter (and loop-free) path.
1624 if (p->length > 0 && id == p->peers[p->length - 1])
1626 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1627 GNUNET_PEER_change_rc(id, -1);
1631 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1632 "MESH: Adding from PUT: %s.\n",
1633 GNUNET_i2s(&put_path[i]));
1635 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1636 p->peers[p->length - 1] = id;
1640 if (get_path_length > 0)
1641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1642 "MESH: (first of GET: %s)\n",
1643 GNUNET_i2s(&get_path[0]));
1644 if (put_path_length > 0)
1645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1646 "MESH: (first of PUT: %s)\n",
1647 GNUNET_i2s(&put_path[0]));
1648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1649 "MESH: In total: %d hops\n",
1651 for (i = 0; i < p->length; i++)
1653 struct GNUNET_PeerIdentity peer_id;
1655 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1659 GNUNET_i2s(&peer_id));
1667 * Send keepalive packets for a peer
1669 * @param cls Closure (tunnel for which to send the keepalive).
1670 * @param tc Notification context.
1672 * TODO: implement explicit multicast keepalive?
1675 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1679 * Search for a tunnel among the tunnels for a client
1681 * @param c the client whose tunnels to search in
1682 * @param tid the local id of the tunnel
1684 * @return tunnel handler, NULL if doesn't exist
1686 static struct MeshTunnel *
1687 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1689 GNUNET_HashCode hash;
1691 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1692 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1694 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1696 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1701 * Search for a tunnel by global ID using PEER_ID
1703 * @param pi owner of the tunnel
1704 * @param tid global tunnel number
1706 * @return tunnel handler, NULL if doesn't exist
1708 static struct MeshTunnel *
1709 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1711 struct MESH_TunnelID id;
1712 GNUNET_HashCode hash;
1717 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1718 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1723 * Search for a tunnel by global ID using full PeerIdentities
1725 * @param oid owner of the tunnel
1726 * @param tid global tunnel number
1728 * @return tunnel handler, NULL if doesn't exist
1730 static struct MeshTunnel *
1731 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1733 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1738 * Callback used to notify a client owner of a tunnel that a peer has
1739 * disconnected, most likely because of a path change.
1741 * @param n Node in the tree representing the disconnected peer
1743 * FIXME: pass tunnel via cls, make param just a peer identity
1746 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1748 struct MeshPeerInfo *peer;
1749 struct MeshPathInfo *path_info;
1751 if (NULL != n->t->client && NULL != nc)
1753 struct GNUNET_MESH_PeerControl msg;
1754 msg.header.size = htons (sizeof (msg));
1755 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1756 msg.tunnel_id = htonl (n->t->local_tid);
1757 GNUNET_PEER_resolve (n->peer, &msg.peer);
1758 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1759 &msg.header, GNUNET_NO);
1761 peer = peer_info_get_short(n->peer);
1762 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1763 path_info->peer = peer;
1764 path_info->t = n->t;
1765 GNUNET_SCHEDULER_add_now(&peer_info_connect_task, path_info);
1770 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1771 * needed rescources.
1772 * If peer already exists, reevaluate shortest path and change if different.
1774 * @param t Tunnel we want to add a new peer to
1775 * @param peer PeerInfo of the peer being added
1779 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1781 struct GNUNET_PeerIdentity id;
1782 struct MeshPeerPath *best_p;
1783 struct MeshPeerPath *p;
1784 unsigned int best_cost;
1787 GNUNET_PEER_resolve(peer->id, &id);
1789 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1792 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1793 GNUNET_CONTAINER_multihashmap_put(
1797 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1800 if (NULL != (p = peer->path_head))
1803 best_cost = path_get_cost(t->tree, p);
1806 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1813 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1814 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1815 t->path_refresh_task =
1816 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1820 /* Start a DHT get if necessary */
1821 peer_info_connect(peer, t);
1826 * Add a path to a tunnel which we don't own, just to remember the next hop.
1827 * If destination node was already in the tunnel, the first hop information
1828 * will be replaced with the new path.
1830 * @param t Tunnel we want to add a new peer to
1831 * @param p Path to add
1832 * @param own_pos Position of local node in path.
1836 tunnel_add_path (struct MeshTunnel *t,
1837 struct MeshPeerPath *p,
1838 unsigned int own_pos)
1840 struct GNUNET_PeerIdentity id;
1842 GNUNET_assert (0 != own_pos);
1843 tree_add_path(t->tree, p, NULL);
1844 if (NULL == t->tree->me)
1845 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1846 if (own_pos < p->length - 1)
1848 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1849 tree_update_first_hops(t->tree, t->tree->me, &id);
1855 * Notifies a tunnel that a connection has broken that affects at least
1856 * some of its peers. Sends a notification towards the root of the tree.
1857 * In case the peer is the owner of the tree, notifies the client that owns
1858 * the tunnel and tries to reconnect.
1860 * @param t Tunnel affected.
1861 * @param p1 Peer that got disconnected from p2.
1862 * @param p2 Peer that got disconnected from p1.
1864 * @return Short ID of the peer disconnected (either p1 or p2).
1865 * 0 if the tunnel remained unaffected.
1867 static GNUNET_PEER_Id
1868 tunnel_notify_connection_broken (struct MeshTunnel *t,
1874 pid = tree_notify_connection_broken (t->tree,
1877 ¬ify_peer_disconnected);
1878 if (myid != p1 && myid != p2)
1884 if (NULL != t->tree->me->parent)
1886 /* We are the peer still connected, notify owner of the disconnection. */
1887 struct GNUNET_MESH_PathBroken msg;
1888 struct GNUNET_PeerIdentity neighbor;
1890 msg.header.size = htons (sizeof (msg));
1891 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1892 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1893 msg.tid = htonl (t->id.tid);
1894 msg.peer1 = my_full_id;
1895 GNUNET_PEER_resolve (pid, &msg.peer2);
1896 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1897 send_message (&msg.header, &neighbor);
1905 * Send a message in a tunnel in multicast, sending a copy to each child node
1906 * down the local one in the tunnel tree.
1908 * @param t Tunnel in which to send the data.
1909 * @param msg Message to be sent
1911 * @return Number of copies sent.
1913 * TODO: unifiy shared resources and reference counter management
1916 tunnel_send_multicast (struct MeshTunnel *t,
1917 const struct GNUNET_MessageHeader *msg)
1919 struct GNUNET_PeerIdentity neighbor;
1920 struct MeshDataDescriptor *info;
1921 struct MeshTunnelTreeNode *n;
1922 struct MeshTunnelTreeNode *counter;
1923 GNUNET_SCHEDULER_TaskIdentifier *task;
1924 unsigned int *copies;
1929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1930 "MESH: sending a multicast packet...\n");
1931 size = ntohs (msg->size);
1932 GNUNET_assert (NULL != t->tree->me);
1933 n = t->tree->me->children_head;
1936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1937 "MESH: no children in the tree, no one to send.\n");
1940 copies = GNUNET_malloc (sizeof (unsigned int));
1941 for (counter = n; NULL != counter; counter = counter->next)
1943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1944 data = GNUNET_malloc (size);
1945 memcpy (data, msg, size);
1946 if (NULL != t->client)
1948 task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
1949 *task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1954 task = NULL; // So GCC shuts up about task being potentially uninitialized
1957 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1960 info->copies = copies;
1961 if (NULL != t->client)
1963 info->client = t->client->handle;
1964 info->timeout_task = task;
1966 info->destination = n->peer;
1967 GNUNET_PEER_resolve (n->peer, &neighbor);
1968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1969 "MESH: sending to %s...\n",
1970 GNUNET_i2s (&neighbor));
1971 info->peer = peer_info_get(&neighbor);
1972 GNUNET_assert (NULL != info->peer);
1973 i = peer_info_transmit_slot(info->peer);
1974 info->handler_n = i;
1975 info->peer->infos[i] = info;
1976 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1977 info->peer->core_transmit[i] =
1978 GNUNET_CORE_notify_transmit_ready (core_handle,
1981 GNUNET_TIME_UNIT_FOREVER_REL,
1984 &send_core_data_multicast, info);
1992 * Send a message to all peers in this tunnel that the tunnel is no longer
1995 * @param t The tunnel whose peers to notify.
1998 tunnel_send_destroy (struct MeshTunnel *t)
2000 struct GNUNET_MESH_TunnelDestroy msg;
2002 msg.header.size = htons (sizeof (msg));
2003 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2004 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2005 msg.tid = htonl (t->id.tid);
2006 tunnel_send_multicast (t, &msg.header);
2012 * Destroy the tunnel and free any allocated resources linked to it
2014 * @param t the tunnel to destroy
2016 * @return GNUNET_OK on success
2019 tunnel_destroy (struct MeshTunnel *t)
2021 struct MeshClient *c;
2022 struct MeshQueue *q;
2023 struct MeshQueue *qn;
2024 GNUNET_HashCode hash;
2033 struct GNUNET_PeerIdentity id;
2035 GNUNET_PEER_resolve(t->id.oid, &id);
2036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2037 "MESH: destroying tunnel %s [%x]\n",
2041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2045 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2046 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2051 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2053 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2057 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2059 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2060 GNUNET_break (GNUNET_YES ==
2061 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2064 if (NULL != t->peers)
2066 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2067 &peer_info_delete_tunnel, t);
2068 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2073 if (NULL != q->data)
2074 GNUNET_free (q->data);
2078 /* TODO cancel core transmit ready in case it was active */
2080 tree_destroy(t->tree);
2081 if (NULL != t->dht_get_type)
2082 GNUNET_DHT_get_stop(t->dht_get_type);
2083 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2084 GNUNET_SCHEDULER_cancel(t->timeout_task);
2085 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2086 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2093 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2094 * that are no longer needed, as well as nodes of no longer reachable peers.
2095 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2097 * @param t Tunnel from which to remove the path.
2098 * @param p Peer which should be removed.
2101 tunnel_delete_peer (struct MeshTunnel *t,
2102 GNUNET_PEER_Id peer)
2104 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2105 if (NULL == t->tree->root)
2111 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2112 * client when the client disconnects.
2114 * @param cls closure (client that is disconnecting)
2115 * @param key the hash of the local tunnel id (used to access the hashmap)
2116 * @param value the value stored at the key (tunnel to destroy)
2118 * @return GNUNET_OK on success
2121 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2123 struct MeshTunnel *t = value;
2126 if (NULL != t->dht_get_type)
2128 GNUNET_DHT_get_stop (t->dht_get_type);
2130 r = tunnel_destroy (t);
2136 * Timeout function, destroys tunnel if called
2138 * @param cls Closure (tunnel to destroy).
2139 * @param tc TaskContext
2142 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2144 struct MeshTunnel *t = cls;
2146 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2148 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2153 * Resets the tunnel timeout. Starts it if no timeout was running.
2155 * @param t Tunnel whose timeout to reset.
2158 tunnel_reset_timeout (struct MeshTunnel *t)
2160 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2161 GNUNET_SCHEDULER_cancel (t->timeout_task);
2162 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2163 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2169 /******************************************************************************/
2170 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2171 /******************************************************************************/
2174 * Function called to notify a client about the socket
2175 * being ready to queue more data. "buf" will be
2176 * NULL and "size" zero if the socket was closed for
2177 * writing in the meantime.
2179 * @param cls closure
2180 * @param size number of bytes available in buf
2181 * @param buf where the callee should write the message
2182 * @return number of bytes written to buf
2185 send_core_create_path (void *cls, size_t size, void *buf)
2187 struct MeshPathInfo *info = cls;
2188 struct GNUNET_MESH_ManipulatePath *msg;
2189 struct GNUNET_PeerIdentity *peer_ptr;
2190 struct MeshPeerInfo *peer = info->peer;
2191 struct MeshTunnel *t = info->t;
2192 struct MeshPeerPath *p = info->path;
2196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2197 "MESH: CREATE PATH sending...\n");
2199 sizeof (struct GNUNET_MESH_ManipulatePath) +
2200 p->length * sizeof (struct GNUNET_PeerIdentity);
2202 if (size < size_needed || NULL == buf)
2204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2208 info->peer->core_transmit[info->pos] =
2209 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2210 GNUNET_TIME_UNIT_FOREVER_REL,
2211 path_get_first_hop (t->tree, peer->id),
2213 &send_core_create_path,
2217 info->peer->core_transmit[info->pos] = NULL;
2220 struct GNUNET_PeerIdentity id;
2222 GNUNET_PEER_resolve (peer->id, &id);
2223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2224 "MESH: setting core_transmit %s [%u] to NULL\n",
2229 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2230 msg->header.size = htons (size_needed);
2231 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2232 msg->tid = ntohl (t->id.tid);
2234 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2235 for (i = 0; i < p->length; i++)
2237 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2244 "MESH: CREATE PATH (%u bytes long) sent!\n",
2251 * Function called to notify a client about the socket
2252 * being ready to queue more data. "buf" will be
2253 * NULL and "size" zero if the socket was closed for
2254 * writing in the meantime.
2256 * @param cls closure (data itself)
2257 * @param size number of bytes available in buf
2258 * @param buf where the callee should write the message
2260 * @return number of bytes written to buf
2263 send_core_data_multicast (void *cls, size_t size, void *buf)
2265 struct MeshDataDescriptor *info = cls;
2268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2269 GNUNET_assert (NULL != info);
2270 GNUNET_assert (NULL != info->peer);
2271 total_size = info->size;
2272 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2274 if (total_size > size)
2277 struct GNUNET_PeerIdentity id;
2279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2280 "MESH: Multicast: retransmitting... (%u/%u)\n",
2282 GNUNET_PEER_resolve(info->peer->id, &id);
2283 info->peer->core_transmit[info->handler_n] =
2284 GNUNET_CORE_notify_transmit_ready (core_handle,
2287 GNUNET_TIME_UNIT_FOREVER_REL,
2290 &send_core_data_multicast,
2294 info->peer->core_transmit[info->handler_n] = NULL;
2295 info->peer->infos[info->handler_n] = NULL;
2296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2297 memcpy (buf, info->data, total_size);
2300 struct GNUNET_MESH_Multicast *mc;
2301 struct GNUNET_MessageHeader *mh;
2304 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2306 mc = (struct GNUNET_MESH_Multicast *) mh;
2307 mh = (struct GNUNET_MessageHeader *) &mc[1];
2308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2309 "MESH: multicast, payload type %u\n",
2311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2312 "MESH: multicast, payload size %u\n",
2317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2323 data_descriptor_decrement_multicast (info);
2324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2332 * Function called to notify a client about the socket
2333 * being ready to queue more data. "buf" will be
2334 * NULL and "size" zero if the socket was closed for
2335 * writing in the meantime.
2337 * @param cls closure (MeshDataDescriptor)
2338 * @param size number of bytes available in buf
2339 * @param buf where the callee should write the message
2340 * @return number of bytes written to buf
2343 send_core_path_ack (void *cls, size_t size, void *buf)
2345 struct MeshDataDescriptor *info = cls;
2346 struct GNUNET_MESH_PathACK *msg = buf;
2348 GNUNET_assert (NULL != info);
2351 info->peer->core_transmit[info->handler_n] = NULL;
2353 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2358 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2359 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2360 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2361 msg->tid = htonl (info->origin->tid);
2362 msg->peer_id = my_full_id;
2364 /* TODO add signature */
2366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2367 return sizeof (struct GNUNET_MESH_PathACK);
2371 /******************************************************************************/
2372 /******************** MESH NETWORK HANDLERS **************************/
2373 /******************************************************************************/
2377 * Core handler for path creation
2379 * @param cls closure
2380 * @param message message
2381 * @param peer peer identity this notification is about
2382 * @param atsi performance data
2383 * @param atsi_count number of records in 'atsi'
2385 * @return GNUNET_OK to keep the connection open,
2386 * GNUNET_SYSERR to close it (signal serious error)
2389 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2390 const struct GNUNET_MessageHeader *message,
2391 const struct GNUNET_ATS_Information *atsi,
2392 unsigned int atsi_count)
2394 unsigned int own_pos;
2397 MESH_TunnelNumber tid;
2398 struct GNUNET_MESH_ManipulatePath *msg;
2399 struct GNUNET_PeerIdentity *pi;
2400 GNUNET_HashCode hash;
2401 struct MeshPeerPath *path;
2402 struct MeshPeerInfo *dest_peer_info;
2403 struct MeshPeerInfo *orig_peer_info;
2404 struct MeshTunnel *t;
2406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2407 "MESH: Received a path create msg [%s]\n",
2408 GNUNET_i2s(&my_full_id));
2409 size = ntohs (message->size);
2410 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2412 GNUNET_break_op (0);
2416 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2417 if (size % sizeof (struct GNUNET_PeerIdentity))
2419 GNUNET_break_op (0);
2422 size /= sizeof (struct GNUNET_PeerIdentity);
2425 GNUNET_break_op (0);
2428 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2429 "MESH: path has %u hops.\n",
2431 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2433 tid = ntohl (msg->tid);
2434 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2435 t = tunnel_get (pi, tid);
2436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2437 "MESH: path is for tunnel %s [%X].\n",
2442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2443 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2444 t->id.oid = GNUNET_PEER_intern (pi);
2446 t->local_tid = next_local_tid++;
2447 /* FIXME test if taken */
2448 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2449 t->tree = tree_new(t, t->id.oid);
2451 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2453 GNUNET_CONTAINER_multihashmap_put (
2457 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2463 tunnel_reset_timeout (t);
2464 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2466 GNUNET_CONTAINER_multihashmap_put (
2470 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2478 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2479 if (NULL == dest_peer_info)
2481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2482 "MESH: Creating PeerInfo for destination.\n");
2483 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2484 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2485 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2487 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2489 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2490 if (NULL == orig_peer_info)
2492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2493 "MESH: Creating PeerInfo for origin.\n");
2494 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2495 orig_peer_info->id = GNUNET_PEER_intern (pi);
2496 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2497 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2500 path = path_new (size);
2502 for (i = 0; i < size; i++)
2504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2505 "MESH: ... adding %s\n",
2506 GNUNET_i2s(&pi[i]));
2507 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2508 if (path->peers[i] == myid)
2511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2512 "MESH: Own position: %u\n", own_pos);
2515 /* cannot be self, must be 'not found' */
2516 /* create path: self not found in path through self */
2517 GNUNET_break_op (0);
2518 path_destroy (path);
2519 /* FIXME error. destroy tunnel? leave for timeout? */
2522 tunnel_add_path (t, path, own_pos);
2523 if (own_pos == size - 1)
2525 /* It is for us! Send ack. */
2526 struct GNUNET_MESH_TunnelNotification cmsg;
2527 struct MeshDataDescriptor *info;
2530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2531 "MESH: It's for us!\n");
2532 path_add_to_origin (orig_peer_info, path);
2533 if (NULL == t->peers)
2534 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2535 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2537 &my_full_id.hashPubKey,
2538 peer_info_get(&my_full_id),
2539 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2540 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2541 info->origin = &t->id;
2542 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2543 GNUNET_assert (NULL != info->peer);
2544 j = peer_info_transmit_slot(info->peer);
2545 info->handler_n = j;
2546 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2547 info->peer->infos[j] = info;
2548 info->peer->core_transmit[j] =
2549 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2550 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2551 sizeof (struct GNUNET_MESH_PathACK),
2552 &send_core_path_ack, info);
2553 cmsg.header.size = htons(sizeof(cmsg));
2554 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2555 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2556 cmsg.tunnel_id = htonl(t->local_tid);
2557 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2561 struct MeshPeerPath *path2;
2563 /* It's for somebody else! Retransmit. */
2564 path2 = path_duplicate(path);
2565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2566 "MESH: Retransmitting.\n");
2567 path_add_to_peer(dest_peer_info, path);
2568 path = path_duplicate(path2);
2569 path_add_to_origin(orig_peer_info, path2);
2570 send_create_path(dest_peer_info, path, t);
2577 * Core handler for path destruction
2579 * @param cls closure
2580 * @param message message
2581 * @param peer peer identity this notification is about
2582 * @param atsi performance data
2583 * @param atsi_count number of records in 'atsi'
2585 * @return GNUNET_OK to keep the connection open,
2586 * GNUNET_SYSERR to close it (signal serious error)
2589 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2590 const struct GNUNET_MessageHeader *message,
2591 const struct GNUNET_ATS_Information *atsi,
2592 unsigned int atsi_count)
2594 struct GNUNET_MESH_ManipulatePath *msg;
2595 struct GNUNET_PeerIdentity *pi;
2596 struct MeshPeerPath *path;
2597 struct MeshTunnel *t;
2598 unsigned int own_pos;
2602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2603 "MESH: Received a PATH DESTROY msg from %s\n",
2605 size = ntohs (message->size);
2606 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2608 GNUNET_break_op (0);
2612 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2613 if (size % sizeof (struct GNUNET_PeerIdentity))
2615 GNUNET_break_op (0);
2618 size /= sizeof (struct GNUNET_PeerIdentity);
2621 GNUNET_break_op (0);
2624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2625 "MESH: path has %u hops.\n",
2628 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2629 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2631 "MESH: path is for tunnel %s [%X].\n",
2634 t = tunnel_get (pi, ntohl (msg->tid));
2637 /* TODO notify back: we don't know this tunnel */
2638 GNUNET_break_op (0);
2641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2642 path = path_new (size);
2644 for (i = 0; i < size; i++)
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2647 "MESH: ... adding %s\n",
2648 GNUNET_i2s(&pi[i]));
2649 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2650 if (path->peers[i] == myid)
2653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2654 "MESH: Own position: %u\n", own_pos);
2655 if (own_pos < path->length - 1)
2656 send_message (message, &pi[own_pos + 1]);
2657 tunnel_delete_peer (t, path->peers[path->length - 1]);
2658 path_destroy (path);
2664 * Core handler for notifications of broken paths
2666 * @param cls closure
2667 * @param message message
2668 * @param peer peer identity this notification is about
2669 * @param atsi performance data
2670 * @param atsi_count number of records in 'atsi'
2672 * @return GNUNET_OK to keep the connection open,
2673 * GNUNET_SYSERR to close it (signal serious error)
2676 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2677 const struct GNUNET_MessageHeader *message,
2678 const struct GNUNET_ATS_Information *atsi,
2679 unsigned int atsi_count)
2681 struct GNUNET_MESH_PathBroken *msg;
2682 struct MeshTunnel *t;
2684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2685 "MESH: Received a PATH BROKEN msg from %s\n",
2687 msg = (struct GNUNET_MESH_PathBroken *) message;
2688 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2689 "MESH: regarding %s\n",
2690 GNUNET_i2s(&msg->peer1));
2691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2692 "MESH: regarding %s\n",
2693 GNUNET_i2s(&msg->peer2));
2694 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2697 GNUNET_break_op (0);
2700 tunnel_notify_connection_broken(t,
2701 GNUNET_PEER_search(&msg->peer1),
2702 GNUNET_PEER_search(&msg->peer2));
2709 * Core handler for tunnel destruction
2711 * @param cls closure
2712 * @param message message
2713 * @param peer peer identity this notification is about
2714 * @param atsi performance data
2715 * @param atsi_count number of records in 'atsi'
2717 * @return GNUNET_OK to keep the connection open,
2718 * GNUNET_SYSERR to close it (signal serious error)
2721 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2722 const struct GNUNET_MessageHeader *message,
2723 const struct GNUNET_ATS_Information *atsi,
2724 unsigned int atsi_count)
2726 struct GNUNET_MESH_TunnelDestroy *msg;
2727 struct MeshTunnel *t;
2729 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2730 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2732 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2734 "MESH: for tunnel %s [%u]\n",
2735 GNUNET_i2s (&msg->oid),
2737 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2740 /* Probably already got the message from another path,
2741 * destroyed the tunnel and retransmitted to children.
2746 if (t->id.oid == myid)
2748 GNUNET_break_op (0);
2751 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2753 /* Tunnel was incoming, notify clients */
2754 send_clients_tunnel_destroy (t);
2756 tunnel_send_destroy (t);
2763 * Core handler for mesh network traffic going from the origin to a peer
2765 * @param cls closure
2766 * @param peer peer identity this notification is about
2767 * @param message message
2768 * @param atsi performance data
2769 * @param atsi_count number of records in 'atsi'
2770 * @return GNUNET_OK to keep the connection open,
2771 * GNUNET_SYSERR to close it (signal serious error)
2774 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2775 const struct GNUNET_MessageHeader *message,
2776 const struct GNUNET_ATS_Information *atsi,
2777 unsigned int atsi_count)
2779 struct GNUNET_MESH_Unicast *msg;
2780 struct MeshTunnel *t;
2784 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2785 "MESH: got a unicast packet from %s\n",
2787 size = ntohs (message->size);
2789 sizeof (struct GNUNET_MESH_Unicast) +
2790 sizeof (struct GNUNET_MessageHeader))
2795 msg = (struct GNUNET_MESH_Unicast *) message;
2796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2797 "MESH: of type %u\n",
2798 ntohs (msg[1].header.type));
2799 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2802 /* TODO notify back: we don't know this tunnel */
2803 GNUNET_break_op (0);
2806 tunnel_reset_timeout (t);
2807 pid = GNUNET_PEER_search(&msg->destination);
2810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2811 "MESH: it's for us! sending to clients...\n");
2812 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2816 "MESH: not for us, retransmitting...\n");
2817 send_message (message, path_get_first_hop(t->tree, pid));
2823 * Core handler for mesh network traffic going from the origin to all peers
2825 * @param cls closure
2826 * @param message message
2827 * @param peer peer identity this notification is about
2828 * @param atsi performance data
2829 * @param atsi_count number of records in 'atsi'
2830 * @return GNUNET_OK to keep the connection open,
2831 * GNUNET_SYSERR to close it (signal serious error)
2833 * TODO: Check who we got this from, to validate route.
2836 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2837 const struct GNUNET_MessageHeader *message,
2838 const struct GNUNET_ATS_Information *atsi,
2839 unsigned int atsi_count)
2841 struct GNUNET_MESH_Multicast *msg;
2842 struct MeshTunnel *t;
2845 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2846 "MESH: got a multicast packet from %s\n",
2848 size = ntohs (message->size);
2849 if (sizeof (struct GNUNET_MESH_Multicast) +
2850 sizeof (struct GNUNET_MessageHeader) > size)
2852 GNUNET_break_op (0);
2855 msg = (struct GNUNET_MESH_Multicast *) message;
2856 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2860 /* TODO notify that we dont know that tunnel */
2861 GNUNET_break_op (0);
2864 tunnel_reset_timeout (t);
2866 /* Transmit to locally interested clients */
2867 if (NULL != t->peers &&
2868 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2870 send_subscribed_clients (message, &msg[1].header);
2872 tunnel_send_multicast(t, message);
2878 * Core handler for mesh network traffic toward the owner of a tunnel
2880 * @param cls closure
2881 * @param message message
2882 * @param peer peer identity this notification is about
2883 * @param atsi performance data
2884 * @param atsi_count number of records in 'atsi'
2886 * @return GNUNET_OK to keep the connection open,
2887 * GNUNET_SYSERR to close it (signal serious error)
2890 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2891 const struct GNUNET_MessageHeader *message,
2892 const struct GNUNET_ATS_Information *atsi,
2893 unsigned int atsi_count)
2895 struct GNUNET_MESH_ToOrigin *msg;
2896 struct GNUNET_PeerIdentity id;
2897 struct MeshPeerInfo *peer_info;
2898 struct MeshTunnel *t;
2901 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2902 "MESH: got a ToOrigin packet from %s\n",
2904 size = ntohs (message->size);
2905 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2906 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2908 GNUNET_break_op (0);
2911 msg = (struct GNUNET_MESH_ToOrigin *) message;
2912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2913 "MESH: of type %u\n",
2914 ntohs (msg[1].header.type));
2915 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2919 /* TODO notify that we dont know this tunnel (whom)? */
2920 GNUNET_break_op (0);
2924 if (t->id.oid == myid)
2927 struct GNUNET_MESH_ToOrigin *copy;
2929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2930 "MESH: it's for us! sending to clients...\n");
2931 if (NULL == t->client)
2933 /* got data packet for ownerless tunnel */
2934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2935 "MESH: no clients!\n");
2936 GNUNET_break_op (0);
2939 /* TODO signature verification */
2940 memcpy (cbuf, message, size);
2941 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2942 copy->tid = htonl (t->local_tid);
2943 GNUNET_SERVER_notification_context_unicast (nc,
2949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2950 "MESH: not for us, retransmitting...\n");
2952 peer_info = peer_info_get (&msg->oid);
2953 if (NULL == peer_info)
2955 /* unknown origin of tunnel */
2959 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2960 send_message (message, &id);
2967 * Core handler for path ACKs
2969 * @param cls closure
2970 * @param message message
2971 * @param peer peer identity this notification is about
2972 * @param atsi performance data
2973 * @param atsi_count number of records in 'atsi'
2975 * @return GNUNET_OK to keep the connection open,
2976 * GNUNET_SYSERR to close it (signal serious error)
2979 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2980 const struct GNUNET_MessageHeader *message,
2981 const struct GNUNET_ATS_Information *atsi,
2982 unsigned int atsi_count)
2984 struct GNUNET_MESH_PathACK *msg;
2985 struct GNUNET_PeerIdentity id;
2986 struct MeshTunnelTreeNode *n;
2987 struct MeshPeerInfo *peer_info;
2988 struct MeshTunnel *t;
2990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2991 "MESH: Received a path ACK msg [%s]\n",
2992 GNUNET_i2s(&my_full_id));
2993 msg = (struct GNUNET_MESH_PathACK *) message;
2994 t = tunnel_get (&msg->oid, msg->tid);
2997 /* TODO notify that we don't know the tunnel */
3001 /* Message for us? */
3002 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
3005 if (NULL == t->client)
3007 GNUNET_break_op (0);
3010 if (NULL != t->dht_get_type)
3012 GNUNET_DHT_get_stop (t->dht_get_type);
3013 t->dht_get_type = NULL;
3015 peer_info = peer_info_get (&msg->peer_id);
3016 n = tree_find_peer(t->tree->root, peer_info->id);
3019 GNUNET_break_op (0);
3022 n->status = MESH_PEER_READY;
3023 send_client_peer_connected(t, peer_info->id);
3027 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3028 "MESH: not for us, retransmitting...\n");
3029 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
3030 peer_info = peer_info_get (&msg->oid);
3031 if (NULL == peer_info)
3033 /* If we know the tunnel, we should DEFINITELY know the peer */
3037 send_message (message, &id);
3043 * Functions to handle messages from core
3045 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3046 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3047 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3048 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3049 sizeof (struct GNUNET_MESH_PathBroken)},
3050 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3051 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3052 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3053 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3054 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3055 sizeof (struct GNUNET_MESH_PathACK)},
3061 /******************************************************************************/
3062 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3063 /******************************************************************************/
3066 * deregister_app: iterator for removing each application registered by a client
3068 * @param cls closure
3069 * @param key the hash of the application id (used to access the hashmap)
3070 * @param value the value stored at the key (client)
3072 * @return GNUNET_OK on success
3075 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3077 GNUNET_break (GNUNET_YES ==
3078 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3084 * notify_client_connection_failure: notify a client that the connection to the
3085 * requested remote peer is not possible (for instance, no route found)
3086 * Function called when the socket is ready to queue more data. "buf" will be
3087 * NULL and "size" zero if the socket was closed for writing in the meantime.
3089 * @param cls closure
3090 * @param size number of bytes available in buf
3091 * @param buf where the callee should write the message
3092 * @return number of bytes written to buf
3095 notify_client_connection_failure (void *cls, size_t size, void *buf)
3098 struct MeshPeerInfo *peer_info;
3099 struct GNUNET_MESH_PeerControl *msg;
3100 struct GNUNET_PeerIdentity id;
3102 if (0 == size && NULL == buf)
3104 // TODO retry? cancel?
3108 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3109 peer_info = (struct MeshPeerInfo *) cls;
3110 msg = (struct GNUNET_MESH_PeerControl *) buf;
3111 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3112 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3113 // msg->tunnel_id = htonl(peer_info->t->tid);
3114 GNUNET_PEER_resolve (peer_info->id, &id);
3115 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3123 * Send keepalive packets for a peer
3125 * @param cls Closure (tunnel for which to send the keepalive).
3126 * @param tc Notification context.
3128 * TODO: implement explicit multicast keepalive?
3131 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3133 struct MeshTunnel *t = cls;
3134 struct GNUNET_MessageHeader *payload;
3135 struct GNUNET_MESH_Multicast *msg;
3136 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3137 sizeof(struct GNUNET_MessageHeader);
3140 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3144 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3147 "MESH: sending keepalive for tunnel %d\n",
3150 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3151 msg->header.size = htons (size);
3152 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3153 msg->oid = my_full_id;
3154 msg->tid = htonl(t->id.tid);
3155 payload = (struct GNUNET_MessageHeader *) &msg[1];
3156 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3157 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3158 tunnel_send_multicast (t, &msg->header);
3160 t->path_refresh_task =
3161 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3167 * Function to process paths received for a new peer addition. The recorded
3168 * paths form the initial tunnel, which can be optimized later.
3169 * Called on each result obtained for the DHT search.
3171 * @param cls closure
3172 * @param exp when will this value expire
3173 * @param key key of the result
3174 * @param type type of the result
3175 * @param size number of bytes in data
3176 * @param data pointer to the result data
3178 * TODO: re-issue the request after certain time? cancel after X results?
3181 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3182 const GNUNET_HashCode * key,
3183 const struct GNUNET_PeerIdentity *get_path,
3184 unsigned int get_path_length,
3185 const struct GNUNET_PeerIdentity *put_path,
3186 unsigned int put_path_length,
3187 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3189 struct MeshPathInfo *path_info = cls;
3190 struct MeshPeerPath *p;
3191 struct GNUNET_PeerIdentity pi;
3194 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3195 "MESH: Got results from DHT!\n");
3196 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3197 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3200 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3201 // path_info->peer->dhtget = NULL;
3203 p = path_build_from_dht (get_path, get_path_length,
3204 put_path, put_path_length);
3205 path_add_to_peer (path_info->peer, p);
3206 for (i = 0; i < path_info->peer->ntunnels; i++)
3208 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3209 peer_info_connect(path_info->peer, path_info->t);
3211 // GNUNET_free (path_info);
3218 * Function to process paths received for a new peer addition. The recorded
3219 * paths form the initial tunnel, which can be optimized later.
3220 * Called on each result obtained for the DHT search.
3222 * @param cls closure
3223 * @param exp when will this value expire
3224 * @param key key of the result
3225 * @param type type of the result
3226 * @param size number of bytes in data
3227 * @param data pointer to the result data
3230 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3231 const GNUNET_HashCode * key,
3232 const struct GNUNET_PeerIdentity *get_path,
3233 unsigned int get_path_length,
3234 const struct GNUNET_PeerIdentity *put_path,
3235 unsigned int put_path_length,
3236 enum GNUNET_BLOCK_Type type, size_t size,
3239 const struct GNUNET_PeerIdentity *pi = data;
3240 struct MeshTunnel *t = cls;
3241 struct MeshPeerInfo *peer_info;
3242 struct MeshPeerPath *p;
3244 if (size != sizeof (struct GNUNET_PeerIdentity))
3246 GNUNET_break_op (0);
3249 GNUNET_assert (NULL != t->client);
3250 peer_info = peer_info_get (pi);
3251 (void) GNUNET_CONTAINER_multihashmap_put (
3255 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3257 p = path_build_from_dht (get_path, get_path_length,
3258 put_path, put_path_length);
3259 path_add_to_peer (peer_info, p);
3260 tunnel_add_peer(t, peer_info);
3261 peer_info_connect (peer_info, t);
3265 /******************************************************************************/
3266 /********************* MESH LOCAL HANDLES **************************/
3267 /******************************************************************************/
3271 * Handler for client disconnection
3273 * @param cls closure
3274 * @param client identification of the client; NULL
3275 * for the last call when the server is destroyed
3278 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3280 struct MeshClient *c;
3281 struct MeshClient *next;
3283 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3292 if (c->handle != client && NULL != client)
3294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3299 GNUNET_SERVER_client_drop (c->handle);
3300 if (NULL != c->tunnels)
3302 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3303 &tunnel_destroy_iterator,
3305 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3308 /* deregister clients applications */
3309 if (NULL != c->apps)
3311 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3312 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3314 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3315 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3317 GNUNET_SCHEDULER_cancel (announce_applications_task);
3318 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3320 if (NULL != c->types)
3321 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3323 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3335 * Handler for new clients
3337 * @param cls closure
3338 * @param client identification of the client
3339 * @param message the actual message, which includes messages the client wants
3342 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3343 const struct GNUNET_MessageHeader *message)
3345 struct GNUNET_MESH_ClientConnect *cc_msg;
3346 struct MeshClient *c;
3347 GNUNET_MESH_ApplicationType *a;
3354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3355 /* Check data sanity */
3356 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3357 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3358 ntypes = ntohs (cc_msg->types);
3359 napps = ntohs (cc_msg->applications);
3361 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3364 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3368 /* Create new client structure */
3369 c = GNUNET_malloc (sizeof (struct MeshClient));
3371 c->id = next_client_id++;
3373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3375 GNUNET_SERVER_client_keep (client);
3376 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3379 GNUNET_MESH_ApplicationType at;
3382 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3383 for (i = 0; i < napps; i++)
3386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3387 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3388 /* store in clients hashmap */
3389 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3390 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3391 /* store in global hashmap, for announcements */
3392 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3393 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3395 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3396 announce_applications_task =
3397 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3405 t = (uint16_t *) & a[napps];
3406 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3407 for (i = 0; i < ntypes; i++)
3410 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3412 /* store in clients hashmap */
3413 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3414 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3415 /* store in global hashmap */
3416 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3417 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3421 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3423 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3424 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3425 GNUNET_SERVER_notification_context_add (nc, client);
3427 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3435 * Handler for requests of new tunnels
3437 * @param cls closure
3438 * @param client identification of the client
3439 * @param message the actual message
3442 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3443 const struct GNUNET_MessageHeader *message)
3445 struct GNUNET_MESH_TunnelMessage *t_msg;
3446 struct MeshTunnel *t;
3447 struct MeshClient *c;
3448 GNUNET_HashCode hash;
3450 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3452 /* Sanity check for client registration */
3453 if (NULL == (c = client_get (client)))
3456 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3460 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3463 /* Message sanity check */
3464 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3467 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3471 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3472 /* Sanity check for tunnel numbering */
3473 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3476 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3479 /* Sanity check for duplicate tunnel IDs */
3480 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3483 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3487 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3488 while (NULL != tunnel_get_by_pi (myid, next_tid))
3489 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3490 t->id.tid = next_tid++;
3492 t->local_tid = ntohl (t_msg->tunnel_id);
3494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3495 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3496 GNUNET_i2s (&my_full_id),
3501 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3503 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3505 GNUNET_CONTAINER_multihashmap_put (
3506 c->tunnels, &hash, t,
3507 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3510 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3514 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3516 GNUNET_CONTAINER_multihashmap_put (
3518 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3521 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3524 t->tree = tree_new (t, myid);
3525 t->tree->refresh = REFRESH_PATH_TIME;
3526 t->tree->root->status = MESH_PEER_READY;
3527 t->tree->me = t->tree->root;
3529 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3535 * Handler for requests of deleting tunnels
3537 * @param cls closure
3538 * @param client identification of the client
3539 * @param message the actual message
3542 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3543 const struct GNUNET_MessageHeader *message)
3545 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3546 struct MeshClient *c;
3547 struct MeshTunnel *t;
3548 MESH_TunnelNumber tid;
3549 GNUNET_HashCode hash;
3551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3552 "MESH: Got a DESTROY TUNNEL from client!\n");
3554 /* Sanity check for client registration */
3555 if (NULL == (c = client_get (client)))
3558 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3561 /* Message sanity check */
3562 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3565 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3571 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3573 /* Retrieve tunnel */
3574 tid = ntohl (tunnel_msg->tunnel_id);
3576 /* Remove from local id hashmap */
3577 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3578 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3579 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
3582 tunnel_send_destroy (t);
3584 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3590 * Handler for connection requests to new peers
3592 * @param cls closure
3593 * @param client identification of the client
3594 * @param message the actual message (PeerControl)
3597 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3598 const struct GNUNET_MessageHeader *message)
3600 struct GNUNET_MESH_PeerControl *peer_msg;
3601 struct MeshPeerInfo *peer_info;
3602 struct MeshClient *c;
3603 struct MeshTunnel *t;
3604 MESH_TunnelNumber tid;
3606 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3607 /* Sanity check for client registration */
3608 if (NULL == (c = client_get (client)))
3611 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3615 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3616 /* Sanity check for message size */
3617 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3620 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3624 /* Tunnel exists? */
3625 tid = ntohl (peer_msg->tunnel_id);
3626 t = tunnel_get_by_local_id (c, tid);
3630 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3634 /* Does client own tunnel? */
3635 if (t->client->handle != client)
3638 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3641 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3642 GNUNET_i2s(&peer_msg->peer));
3643 peer_info = peer_info_get (&peer_msg->peer);
3645 tunnel_add_peer(t, peer_info);
3646 peer_info_connect(peer_info, t);
3648 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3654 * Handler for disconnection requests of peers in a tunnel
3656 * @param cls closure
3657 * @param client identification of the client
3658 * @param message the actual message (PeerControl)
3661 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3662 const struct GNUNET_MessageHeader *message)
3664 struct GNUNET_MESH_PeerControl *peer_msg;
3665 struct MeshPeerInfo *peer_info;
3666 struct MeshClient *c;
3667 struct MeshTunnel *t;
3668 MESH_TunnelNumber tid;
3670 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3671 /* Sanity check for client registration */
3672 if (NULL == (c = client_get (client)))
3675 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3678 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3679 /* Sanity check for message size */
3680 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3683 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3687 /* Tunnel exists? */
3688 tid = ntohl (peer_msg->tunnel_id);
3689 t = tunnel_get_by_local_id (c, tid);
3693 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3698 /* Does client own tunnel? */
3699 if (t->client->handle != client)
3702 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3706 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3707 "MESH: for peer %s\n",
3708 GNUNET_i2s(&peer_msg->peer));
3709 /* Is the peer in the tunnel? */
3710 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3711 &peer_msg->peer.hashPubKey);
3712 if (NULL == peer_info)
3715 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3719 /* Ok, delete peer from tunnel */
3720 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3721 &peer_msg->peer.hashPubKey);
3723 send_destroy_path (t, peer_info->id);
3724 tunnel_delete_peer(t, peer_info->id);
3725 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3731 * Handler for connection requests to new peers by type
3733 * @param cls closure
3734 * @param client identification of the client
3735 * @param message the actual message (ConnectPeerByType)
3738 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3739 const struct GNUNET_MessageHeader *message)
3741 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3742 struct MeshClient *c;
3743 struct MeshTunnel *t;
3744 GNUNET_HashCode hash;
3745 MESH_TunnelNumber tid;
3747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3748 /* Sanity check for client registration */
3749 if (NULL == (c = client_get (client)))
3752 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3756 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3757 /* Sanity check for message size */
3758 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3759 ntohs (connect_msg->header.size))
3762 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3766 /* Tunnel exists? */
3767 tid = ntohl (connect_msg->tunnel_id);
3768 t = tunnel_get_by_local_id (c, tid);
3772 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3776 /* Does client own tunnel? */
3777 if (t->client->handle != client)
3780 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3784 /* Do WE have the service? */
3785 t->type = ntohl (connect_msg->type);
3786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3787 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3788 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3791 /* Yes! Fast forward, add ourselves to the tunnel and send the
3792 * good news to the client
3794 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3795 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3796 peer_info_get (&my_full_id),
3797 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3800 send_client_peer_connected(t, myid);
3801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3802 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3805 /* Ok, lets find a peer offering the service */
3806 if (NULL != t->dht_get_type)
3808 GNUNET_DHT_get_stop (t->dht_get_type);
3810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3811 GNUNET_h2s (&hash));
3813 GNUNET_DHT_get_start (dht_handle,
3814 GNUNET_TIME_UNIT_FOREVER_REL,
3815 GNUNET_BLOCK_TYPE_TEST,
3818 GNUNET_DHT_RO_RECORD_ROUTE |
3819 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3821 &dht_get_type_handler, t);
3823 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3829 * Handler for client traffic directed to one peer
3831 * @param cls closure
3832 * @param client identification of the client
3833 * @param message the actual message
3836 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3837 const struct GNUNET_MessageHeader *message)
3839 struct MeshClient *c;
3840 struct MeshTunnel *t;
3841 struct MeshPeerInfo *pi;
3842 struct GNUNET_MESH_Unicast *data_msg;
3843 MESH_TunnelNumber tid;
3846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3847 "MESH: Got a unicast request from a client!\n");
3849 /* Sanity check for client registration */
3850 if (NULL == (c = client_get (client)))
3853 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3856 data_msg = (struct GNUNET_MESH_Unicast *) message;
3857 /* Sanity check for message size */
3858 size = ntohs (message->size);
3859 if (sizeof (struct GNUNET_MESH_Unicast) +
3860 sizeof (struct GNUNET_MessageHeader) > size)
3863 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3867 /* Tunnel exists? */
3868 tid = ntohl (data_msg->tid);
3869 t = tunnel_get_by_local_id (c, tid);
3873 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3877 /* Is it a local tunnel? Then, does client own the tunnel? */
3878 if (NULL != t->client &&
3879 NULL != t->client->handle &&
3880 t->client->handle != client)
3883 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3887 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3888 &data_msg->destination.hashPubKey);
3889 /* Is the selected peer in the tunnel? */
3893 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3897 /* Ok, everything is correct, send the message
3898 * (pretend we got it from a mesh peer)
3901 char buf[ntohs (message->size)];
3902 struct GNUNET_MESH_Unicast *copy;
3904 /* Work around const limitation */
3905 copy = (struct GNUNET_MESH_Unicast *) buf;
3906 memcpy (buf, data_msg, size);
3907 copy->oid = my_full_id;
3908 copy->tid = htonl (t->id.tid);
3909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3910 "MESH: calling generic handler...\n");
3911 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3913 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3919 * Handler for client traffic directed to the origin
3921 * @param cls closure
3922 * @param client identification of the client
3923 * @param message the actual message
3926 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3927 const struct GNUNET_MessageHeader *message)
3929 struct GNUNET_MESH_ToOrigin *data_msg;
3930 struct GNUNET_PeerIdentity id;
3931 struct MeshClient *c;
3932 struct MeshTunnel *t;
3933 MESH_TunnelNumber tid;
3936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3937 "MESH: Got a ToOrigin request from a client!\n");
3939 /* Sanity check for client registration */
3940 if (NULL == (c = client_get (client)))
3943 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3946 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3947 /* Sanity check for message size */
3948 size = ntohs (message->size);
3949 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3950 sizeof (struct GNUNET_MessageHeader) > size)
3953 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3957 /* Tunnel exists? */
3958 tid = ntohl (data_msg->tid);
3959 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3962 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3965 t = tunnel_get_by_local_id (c, tid);
3969 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3973 /* It shouldn't be a local tunnel. */
3974 if (NULL != t->client)
3977 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3980 GNUNET_PEER_resolve(t->id.oid, &id);
3982 /* Ok, everything is correct, send the message
3983 * (pretend we got it from a mesh peer)
3986 char buf[ntohs (message->size)];
3987 struct GNUNET_MESH_ToOrigin *copy;
3989 /* Work around const limitation */
3990 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3991 memcpy (buf, data_msg, size);
3993 copy->tid = htonl (t->id.tid);
3994 copy->sender = my_full_id;
3995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3996 "MESH: calling generic handler...\n");
3997 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3999 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4005 * Handler for client traffic directed to all peers in a tunnel
4007 * @param cls closure
4008 * @param client identification of the client
4009 * @param message the actual message
4012 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
4013 const struct GNUNET_MessageHeader *message)
4015 struct MeshClient *c;
4016 struct MeshTunnel *t;
4017 struct GNUNET_MESH_Multicast *data_msg;
4018 MESH_TunnelNumber tid;
4020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4021 "MESH: Got a multicast request from a client!\n");
4023 /* Sanity check for client registration */
4024 if (NULL == (c = client_get (client)))
4027 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4030 data_msg = (struct GNUNET_MESH_Multicast *) message;
4031 /* Sanity check for message size */
4032 if (sizeof (struct GNUNET_MESH_Multicast) +
4033 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4036 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4040 /* Tunnel exists? */
4041 tid = ntohl (data_msg->tid);
4042 t = tunnel_get_by_local_id (c, tid);
4046 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4050 /* Does client own tunnel? */
4051 if (t->client->handle != client)
4054 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4059 char buf[ntohs(message->size)];
4060 struct GNUNET_MESH_Multicast *copy;
4062 copy = (struct GNUNET_MESH_Multicast *)buf;
4063 memcpy(buf, message, ntohs(message->size));
4064 copy->oid = my_full_id;
4065 copy->tid = htonl(t->id.tid);
4066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4067 "MESH: calling generic handler...\n");
4068 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4071 /* receive done gets called when last copy is sent to a neighbor */
4076 * Functions to handle messages from clients
4078 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4079 {&handle_local_new_client, NULL,
4080 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4081 {&handle_local_tunnel_create, NULL,
4082 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4083 sizeof (struct GNUNET_MESH_TunnelMessage)},
4084 {&handle_local_tunnel_destroy, NULL,
4085 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4086 sizeof (struct GNUNET_MESH_TunnelMessage)},
4087 {&handle_local_connect_add, NULL,
4088 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4089 sizeof (struct GNUNET_MESH_PeerControl)},
4090 {&handle_local_connect_del, NULL,
4091 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4092 sizeof (struct GNUNET_MESH_PeerControl)},
4093 {&handle_local_connect_by_type, NULL,
4094 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4095 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4096 {&handle_local_unicast, NULL,
4097 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4098 {&handle_local_to_origin, NULL,
4099 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4100 {&handle_local_multicast, NULL,
4101 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4107 * To be called on core init/fail.
4109 * @param cls service closure
4110 * @param server handle to the server for this service
4111 * @param identity the public identity of this peer
4114 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4115 const struct GNUNET_PeerIdentity *identity)
4117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4118 core_handle = server;
4119 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4121 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4122 GNUNET_SCHEDULER_shutdown();
4128 * Method called whenever a given peer connects.
4130 * @param cls closure
4131 * @param peer peer identity this notification is about
4132 * @param atsi performance data for the connection
4133 * @param atsi_count number of records in 'atsi'
4136 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4137 const struct GNUNET_ATS_Information *atsi,
4138 unsigned int atsi_count)
4140 struct MeshPeerInfo *peer_info;
4141 struct MeshPeerPath *path;
4143 #if MESH_DEBUG_CONNECTION
4144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4146 GNUNET_i2s(&my_full_id));
4148 peer_info = peer_info_get (peer);
4149 if (myid == peer_info->id)
4151 #if MESH_DEBUG_CONNECTION
4152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4156 #if MESH_DEBUG_CONNECTION
4159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4163 path = path_new (2);
4164 path->peers[0] = myid;
4165 path->peers[1] = peer_info->id;
4166 GNUNET_PEER_change_rc(myid, 1);
4167 GNUNET_PEER_change_rc(peer_info->id, 1);
4168 path_add_to_peer (peer_info, path);
4173 * Method called whenever a peer disconnects.
4175 * @param cls closure
4176 * @param peer peer identity this notification is about
4179 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4181 struct MeshPeerInfo *pi;
4184 #if MESH_DEBUG_CONNECTION
4185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4187 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4193 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4195 /* TODO: notify that the transmission failed */
4196 peer_info_cancel_transmission(pi, i);
4198 path_remove_from_peer (pi, pi->id, myid);
4199 #if MESH_DEBUG_CONNECTION
4202 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4209 /******************************************************************************/
4210 /************************ MAIN FUNCTIONS ****************************/
4211 /******************************************************************************/
4214 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4216 * @param cls closure
4217 * @param key current key code
4218 * @param value value in the hash map
4219 * @return GNUNET_YES if we should continue to iterate,
4223 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4225 struct MeshTunnel *t = value;
4231 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4233 * @param cls closure
4234 * @param key current key code
4235 * @param value value in the hash map
4236 * @return GNUNET_YES if we should continue to iterate,
4240 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4242 struct MeshPeerInfo *p = value;
4243 peer_info_destroy (p);
4248 * Task run during shutdown.
4254 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4256 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4257 /* TODO: destroy tunnels? */
4258 if (core_handle != NULL)
4260 GNUNET_CORE_disconnect (core_handle);
4263 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4264 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4265 if (dht_handle != NULL)
4267 GNUNET_DHT_disconnect (dht_handle);
4272 GNUNET_SERVER_notification_context_destroy (nc);
4275 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4277 GNUNET_SCHEDULER_cancel (announce_id_task);
4278 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4284 * Process mesh requests.
4286 * @param cls closure
4287 * @param server the initialized server
4288 * @param c configuration to use
4291 run (void *cls, struct GNUNET_SERVER_Handle *server,
4292 const struct GNUNET_CONFIGURATION_Handle *c)
4294 struct MeshPeerInfo *peer;
4295 struct MeshPeerPath *p;
4298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4299 server_handle = server;
4300 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4301 CORE_QUEUE_SIZE, /* queue size */
4302 NULL, /* Closure passed to MESH functions */
4303 &core_init, /* Call core_init once connected */
4304 &core_connect, /* Handle connects */
4305 &core_disconnect, /* remove peers on disconnects */
4306 NULL, /* Don't notify about all incoming messages */
4307 GNUNET_NO, /* For header only in notification */
4308 NULL, /* Don't notify about all outbound messages */
4309 GNUNET_NO, /* For header-only out notification */
4310 core_handlers); /* Register these handlers */
4311 if (core_handle == NULL)
4314 GNUNET_SCHEDULER_shutdown ();
4319 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4322 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4324 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4325 GNUNET_SCHEDULER_shutdown ();
4328 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4329 GNUNET_free (keyfile);
4330 if (my_private_key == NULL)
4332 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4333 _("Mesh service could not access hostkey. Exiting.\n"));
4334 GNUNET_SCHEDULER_shutdown ();
4337 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4338 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4339 &my_full_id.hashPubKey);
4340 myid = GNUNET_PEER_intern (&my_full_id);
4342 dht_handle = GNUNET_DHT_connect (c, 64);
4343 if (dht_handle == NULL)
4349 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4351 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4352 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4353 peers = GNUNET_CONTAINER_multihashmap_create (32);
4354 applications = GNUNET_CONTAINER_multihashmap_create (32);
4355 types = GNUNET_CONTAINER_multihashmap_create (32);
4357 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4358 nc = GNUNET_SERVER_notification_context_create (server_handle,
4360 GNUNET_SERVER_disconnect_notify (server_handle,
4361 &handle_local_client_disconnect,
4366 clients_tail = NULL;
4371 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4372 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4374 /* Create a peer_info for the local peer */
4375 peer = peer_info_get(&my_full_id);
4378 path_add_to_peer(peer, p);
4380 /* Scheduled the task to clean up when shutdown is called */
4381 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4388 * The main function for the mesh service.
4390 * @param argc number of arguments from the command line
4391 * @param argv command line arguments
4392 * @return 0 ok, 1 on error
4395 main (int argc, char *const *argv)
4399 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4402 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");