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 (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1352 peer_info_connect (path_info->peer, path_info->t);
1358 * Destroy the peer_info and free any allocated resources linked to it
1360 * @param pi The peer_info to destroy.
1362 * @return GNUNET_OK on success
1365 peer_info_destroy (struct MeshPeerInfo *pi)
1367 struct GNUNET_PeerIdentity id;
1368 struct MeshPeerPath *p;
1369 struct MeshPeerPath *nextp;
1372 GNUNET_PEER_resolve (pi->id, &id);
1373 GNUNET_PEER_change_rc (pi->id, -1);
1376 GNUNET_CONTAINER_multihashmap_remove (peers,&id.hashPubKey, pi))
1379 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1380 "MESH: removing peer %s, not in hashmap\n",
1383 if (NULL != pi->dhtget)
1385 GNUNET_DHT_get_stop(pi->dhtget);
1386 GNUNET_free (pi->dhtgetcls);
1388 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1390 peer_info_cancel_transmission(pi, i);
1396 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1406 * Remove all paths that rely on a direct connection between p1 and p2
1407 * from the peer itself and notify all tunnels about it.
1409 * @param peer PeerInfo of affected peer.
1410 * @param p1 GNUNET_PEER_Id of one peer.
1411 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1414 * TODO: optimize (see below)
1417 path_remove_from_peer (struct MeshPeerInfo *peer,
1421 struct MeshPeerPath *p;
1422 struct MeshPeerPath *aux;
1423 struct MeshPeerInfo *peer_d;
1425 unsigned int destroyed;
1431 p = peer->path_head;
1435 for (i = 0; i < (p->length - 1); i++)
1437 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1438 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1440 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1451 for (i = 0; i < peer->ntunnels; i++)
1453 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1455 * Problem: one or more peers have been deleted from the tunnel tree.
1456 * We don't know who they are to try to add them again.
1457 * We need to try to find a new path for each of the disconnected peers.
1458 * Some of them might already have a path to reach them that does not
1459 * involve p1 and p2. Adding all anew might render in a better tree than
1460 * the trivial immediate fix.
1462 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1463 * its children will be reachable trough him.
1465 peer_d = peer_info_get_short(d);
1468 for (p = peer_d->path_head; NULL != p; p = p->next)
1470 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1478 /* No callback, as peer will be already disconnected */
1479 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1483 peer_info_connect (peer_d, peer->tunnels[i]);
1490 * Add the path to the peer and update the path used to reach it in case this
1493 * @param peer_info Destination peer to add the path to.
1494 * @param path New path to add. Last peer must be the peer in arg 1.
1495 * Path will be either used of freed if already known.
1497 * TODO: trim the part from origin to us? Add it as path to origin?
1500 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1502 struct MeshPeerPath *aux;
1506 if ((NULL == peer_info) || (NULL == path))
1509 path_destroy (path);
1512 for (l = 1; l < path->length; l++)
1514 if (path->peers[l] == myid)
1516 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1517 "MESH: shortening path by %u\n",
1519 for (l2 = 0; l2 < path->length - l - 1 ; l2++)
1521 path->peers[l2] = path->peers[l + l2];
1525 path->peers = GNUNET_realloc (path->peers,
1526 path->length * sizeof (GNUNET_PEER_Id));
1531 struct GNUNET_PeerIdentity id;
1533 GNUNET_PEER_resolve (peer_info->id, &id);
1534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1535 "MESH: adding path [%u] to peer %s\n",
1540 l = path_get_length (path);
1547 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1549 l2 = path_get_length (aux);
1552 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1553 peer_info->path_tail,
1560 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1567 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head,
1568 peer_info->path_tail,
1575 * Add the path to the origin peer and update the path used to reach it in case
1576 * this is the shortest.
1577 * The path is given in peer_info -> destination, therefore we turn the path
1578 * upside down first.
1580 * @param peer_info Peer to add the path to, being the origin of the path.
1581 * @param path New path to add after being inversed.
1584 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1587 path_add_to_peer (peer_info, path);
1592 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1593 * to obtain a local peer -> destination path and interning the peer ids.
1595 * @return Newly allocated and created path
1597 static struct MeshPeerPath *
1598 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1599 unsigned int get_path_length,
1600 const struct GNUNET_PeerIdentity *put_path,
1601 unsigned int put_path_length)
1603 struct MeshPeerPath *p;
1609 GNUNET_PEER_change_rc(myid, 1);
1610 i = get_path_length;
1611 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1612 for (i--; i >= 0; i--)
1614 id = GNUNET_PEER_intern (&get_path[i]);
1615 if (p->length > 0 && id == p->peers[p->length - 1])
1617 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1618 GNUNET_PEER_change_rc(id, -1);
1622 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1623 "MESH: Adding from GET: %s.\n",
1624 GNUNET_i2s(&get_path[i]));
1626 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1627 p->peers[p->length - 1] = id;
1630 i = put_path_length;
1631 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1632 for (i--; i >= 0; i--)
1634 id = GNUNET_PEER_intern (&put_path[i]);
1637 /* PUT path went through us, so discard the path up until now and start
1638 * from here to get a much shorter (and loop-free) path.
1643 if (p->length > 0 && id == p->peers[p->length - 1])
1645 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1646 GNUNET_PEER_change_rc(id, -1);
1650 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1651 "MESH: Adding from PUT: %s.\n",
1652 GNUNET_i2s(&put_path[i]));
1654 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1655 p->peers[p->length - 1] = id;
1659 if (get_path_length > 0)
1660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1661 "MESH: (first of GET: %s)\n",
1662 GNUNET_i2s(&get_path[0]));
1663 if (put_path_length > 0)
1664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1665 "MESH: (first of PUT: %s)\n",
1666 GNUNET_i2s(&put_path[0]));
1667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1668 "MESH: In total: %d hops\n",
1670 for (i = 0; i < p->length; i++)
1672 struct GNUNET_PeerIdentity peer_id;
1674 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1678 GNUNET_i2s(&peer_id));
1686 * Send keepalive packets for a peer
1688 * @param cls Closure (tunnel for which to send the keepalive).
1689 * @param tc Notification context.
1691 * TODO: implement explicit multicast keepalive?
1694 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1698 * Search for a tunnel among the tunnels for a client
1700 * @param c the client whose tunnels to search in
1701 * @param tid the local id of the tunnel
1703 * @return tunnel handler, NULL if doesn't exist
1705 static struct MeshTunnel *
1706 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1708 GNUNET_HashCode hash;
1710 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1711 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1713 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1715 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1720 * Search for a tunnel by global ID using PEER_ID
1722 * @param pi owner of the tunnel
1723 * @param tid global tunnel number
1725 * @return tunnel handler, NULL if doesn't exist
1727 static struct MeshTunnel *
1728 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1730 struct MESH_TunnelID id;
1731 GNUNET_HashCode hash;
1736 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1737 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1742 * Search for a tunnel by global ID using full PeerIdentities
1744 * @param oid owner of the tunnel
1745 * @param tid global tunnel number
1747 * @return tunnel handler, NULL if doesn't exist
1749 static struct MeshTunnel *
1750 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1752 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1757 * Callback used to notify a client owner of a tunnel that a peer has
1758 * disconnected, most likely because of a path change.
1760 * @param n Node in the tree representing the disconnected peer
1762 * FIXME: pass tunnel via cls, make param just a peer identity
1765 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1767 struct MeshPeerInfo *peer;
1768 struct MeshPathInfo *path_info;
1770 if (NULL != n->t->client && NULL != nc)
1772 struct GNUNET_MESH_PeerControl msg;
1773 msg.header.size = htons (sizeof (msg));
1774 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1775 msg.tunnel_id = htonl (n->t->local_tid);
1776 GNUNET_PEER_resolve (n->peer, &msg.peer);
1777 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1778 &msg.header, GNUNET_NO);
1780 peer = peer_info_get_short(n->peer);
1781 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1782 path_info->peer = peer;
1783 path_info->t = n->t;
1784 GNUNET_SCHEDULER_add_now(&peer_info_connect_task, path_info);
1789 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1790 * needed rescources.
1791 * If peer already exists, reevaluate shortest path and change if different.
1793 * @param t Tunnel we want to add a new peer to
1794 * @param peer PeerInfo of the peer being added
1798 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1800 struct GNUNET_PeerIdentity id;
1801 struct MeshPeerPath *best_p;
1802 struct MeshPeerPath *p;
1803 unsigned int best_cost;
1806 GNUNET_PEER_resolve(peer->id, &id);
1808 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1811 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1812 GNUNET_CONTAINER_multihashmap_put(
1816 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1819 if (NULL != (p = peer->path_head))
1822 best_cost = path_get_cost(t->tree, p);
1825 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1832 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1833 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1834 t->path_refresh_task =
1835 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1839 /* Start a DHT get if necessary */
1840 peer_info_connect(peer, t);
1845 * Add a path to a tunnel which we don't own, just to remember the next hop.
1846 * If destination node was already in the tunnel, the first hop information
1847 * will be replaced with the new path.
1849 * @param t Tunnel we want to add a new peer to
1850 * @param p Path to add
1851 * @param own_pos Position of local node in path.
1855 tunnel_add_path (struct MeshTunnel *t,
1856 struct MeshPeerPath *p,
1857 unsigned int own_pos)
1859 struct GNUNET_PeerIdentity id;
1861 GNUNET_assert (0 != own_pos);
1862 tree_add_path(t->tree, p, NULL);
1863 if (NULL == t->tree->me)
1864 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1865 if (own_pos < p->length - 1)
1867 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1868 tree_update_first_hops(t->tree, t->tree->me, &id);
1874 * Notifies a tunnel that a connection has broken that affects at least
1875 * some of its peers. Sends a notification towards the root of the tree.
1876 * In case the peer is the owner of the tree, notifies the client that owns
1877 * the tunnel and tries to reconnect.
1879 * @param t Tunnel affected.
1880 * @param p1 Peer that got disconnected from p2.
1881 * @param p2 Peer that got disconnected from p1.
1883 * @return Short ID of the peer disconnected (either p1 or p2).
1884 * 0 if the tunnel remained unaffected.
1886 static GNUNET_PEER_Id
1887 tunnel_notify_connection_broken (struct MeshTunnel *t,
1893 pid = tree_notify_connection_broken (t->tree,
1896 ¬ify_peer_disconnected);
1897 if (myid != p1 && myid != p2)
1903 if (NULL != t->tree->me->parent)
1905 /* We are the peer still connected, notify owner of the disconnection. */
1906 struct GNUNET_MESH_PathBroken msg;
1907 struct GNUNET_PeerIdentity neighbor;
1909 msg.header.size = htons (sizeof (msg));
1910 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1911 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1912 msg.tid = htonl (t->id.tid);
1913 msg.peer1 = my_full_id;
1914 GNUNET_PEER_resolve (pid, &msg.peer2);
1915 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1916 send_message (&msg.header, &neighbor);
1924 * Send a message in a tunnel in multicast, sending a copy to each child node
1925 * down the local one in the tunnel tree.
1927 * @param t Tunnel in which to send the data.
1928 * @param msg Message to be sent
1930 * @return Number of copies sent.
1932 * TODO: unifiy shared resources and reference counter management
1935 tunnel_send_multicast (struct MeshTunnel *t,
1936 const struct GNUNET_MessageHeader *msg)
1938 struct GNUNET_PeerIdentity neighbor;
1939 struct MeshDataDescriptor *info;
1940 struct MeshTunnelTreeNode *n;
1941 struct MeshTunnelTreeNode *counter;
1942 GNUNET_SCHEDULER_TaskIdentifier *task;
1943 unsigned int *copies;
1948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1949 "MESH: sending a multicast packet...\n");
1950 size = ntohs (msg->size);
1951 GNUNET_assert (NULL != t->tree->me);
1952 n = t->tree->me->children_head;
1955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1956 "MESH: no children in the tree, no one to send.\n");
1959 copies = GNUNET_malloc (sizeof (unsigned int));
1960 for (counter = n; NULL != counter; counter = counter->next)
1962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1963 data = GNUNET_malloc (size);
1964 memcpy (data, msg, size);
1965 if (NULL != t->client)
1967 task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
1968 *task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1973 task = NULL; // So GCC shuts up about task being potentially uninitialized
1976 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1979 info->copies = copies;
1980 if (NULL != t->client)
1982 info->client = t->client->handle;
1983 info->timeout_task = task;
1985 info->destination = n->peer;
1986 GNUNET_PEER_resolve (n->peer, &neighbor);
1987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1988 "MESH: sending to %s...\n",
1989 GNUNET_i2s (&neighbor));
1990 info->peer = peer_info_get(&neighbor);
1991 GNUNET_assert (NULL != info->peer);
1992 i = peer_info_transmit_slot(info->peer);
1993 info->handler_n = i;
1994 info->peer->infos[i] = info;
1995 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1996 info->peer->core_transmit[i] =
1997 GNUNET_CORE_notify_transmit_ready (core_handle,
2000 GNUNET_TIME_UNIT_FOREVER_REL,
2003 &send_core_data_multicast, info);
2011 * Send a message to all peers in this tunnel that the tunnel is no longer
2014 * @param t The tunnel whose peers to notify.
2017 tunnel_send_destroy (struct MeshTunnel *t)
2019 struct GNUNET_MESH_TunnelDestroy msg;
2021 msg.header.size = htons (sizeof (msg));
2022 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2023 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2024 msg.tid = htonl (t->id.tid);
2025 tunnel_send_multicast (t, &msg.header);
2031 * Destroy the tunnel and free any allocated resources linked to it
2033 * @param t the tunnel to destroy
2035 * @return GNUNET_OK on success
2038 tunnel_destroy (struct MeshTunnel *t)
2040 struct MeshClient *c;
2041 struct MeshQueue *q;
2042 struct MeshQueue *qn;
2043 GNUNET_HashCode hash;
2052 struct GNUNET_PeerIdentity id;
2054 GNUNET_PEER_resolve(t->id.oid, &id);
2055 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2056 "MESH: destroying tunnel %s [%x]\n",
2060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2064 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2065 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2070 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2072 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2076 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2078 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2079 GNUNET_break (GNUNET_YES ==
2080 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
2083 if (NULL != t->peers)
2085 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
2086 &peer_info_delete_tunnel, t);
2087 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2092 if (NULL != q->data)
2093 GNUNET_free (q->data);
2097 /* TODO cancel core transmit ready in case it was active */
2099 tree_destroy(t->tree);
2100 if (NULL != t->dht_get_type)
2101 GNUNET_DHT_get_stop(t->dht_get_type);
2102 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2103 GNUNET_SCHEDULER_cancel(t->timeout_task);
2104 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2105 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
2112 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2113 * that are no longer needed, as well as nodes of no longer reachable peers.
2114 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2116 * @param t Tunnel from which to remove the path.
2117 * @param p Peer which should be removed.
2120 tunnel_delete_peer (struct MeshTunnel *t,
2121 GNUNET_PEER_Id peer)
2123 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2124 if (NULL == t->tree->root)
2130 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2131 * client when the client disconnects.
2133 * @param cls closure (client that is disconnecting)
2134 * @param key the hash of the local tunnel id (used to access the hashmap)
2135 * @param value the value stored at the key (tunnel to destroy)
2137 * @return GNUNET_OK on success
2140 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2142 struct MeshTunnel *t = value;
2145 if (NULL != t->dht_get_type)
2147 GNUNET_DHT_get_stop (t->dht_get_type);
2149 r = tunnel_destroy (t);
2155 * Timeout function, destroys tunnel if called
2157 * @param cls Closure (tunnel to destroy).
2158 * @param tc TaskContext
2161 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2163 struct MeshTunnel *t = cls;
2165 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2167 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2172 * Resets the tunnel timeout. Starts it if no timeout was running.
2174 * @param t Tunnel whose timeout to reset.
2177 tunnel_reset_timeout (struct MeshTunnel *t)
2179 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2180 GNUNET_SCHEDULER_cancel (t->timeout_task);
2181 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2182 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2188 /******************************************************************************/
2189 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2190 /******************************************************************************/
2193 * Function called to notify a client about the socket
2194 * being ready to queue more data. "buf" will be
2195 * NULL and "size" zero if the socket was closed for
2196 * writing in the meantime.
2198 * @param cls closure
2199 * @param size number of bytes available in buf
2200 * @param buf where the callee should write the message
2201 * @return number of bytes written to buf
2204 send_core_create_path (void *cls, size_t size, void *buf)
2206 struct MeshPathInfo *info = cls;
2207 struct GNUNET_MESH_ManipulatePath *msg;
2208 struct GNUNET_PeerIdentity *peer_ptr;
2209 struct MeshPeerInfo *peer = info->peer;
2210 struct MeshTunnel *t = info->t;
2211 struct MeshPeerPath *p = info->path;
2215 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2216 "MESH: CREATE PATH sending...\n");
2218 sizeof (struct GNUNET_MESH_ManipulatePath) +
2219 p->length * sizeof (struct GNUNET_PeerIdentity);
2221 if (size < size_needed || NULL == buf)
2223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2227 info->peer->core_transmit[info->pos] =
2228 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2229 GNUNET_TIME_UNIT_FOREVER_REL,
2230 path_get_first_hop (t->tree, peer->id),
2232 &send_core_create_path,
2236 info->peer->core_transmit[info->pos] = NULL;
2239 struct GNUNET_PeerIdentity id;
2241 GNUNET_PEER_resolve (peer->id, &id);
2242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2243 "MESH: setting core_transmit %s [%u] to NULL\n",
2248 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2249 msg->header.size = htons (size_needed);
2250 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2251 msg->tid = ntohl (t->id.tid);
2253 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2254 for (i = 0; i < p->length; i++)
2256 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2263 "MESH: CREATE PATH (%u bytes long) sent!\n",
2270 * Function called to notify a client about the socket
2271 * being ready to queue more data. "buf" will be
2272 * NULL and "size" zero if the socket was closed for
2273 * writing in the meantime.
2275 * @param cls closure (data itself)
2276 * @param size number of bytes available in buf
2277 * @param buf where the callee should write the message
2279 * @return number of bytes written to buf
2282 send_core_data_multicast (void *cls, size_t size, void *buf)
2284 struct MeshDataDescriptor *info = cls;
2287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2288 GNUNET_assert (NULL != info);
2289 GNUNET_assert (NULL != info->peer);
2290 total_size = info->size;
2291 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2293 if (total_size > size)
2296 struct GNUNET_PeerIdentity id;
2298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2299 "MESH: Multicast: retransmitting... (%u/%u)\n",
2301 GNUNET_PEER_resolve(info->peer->id, &id);
2302 info->peer->core_transmit[info->handler_n] =
2303 GNUNET_CORE_notify_transmit_ready (core_handle,
2306 GNUNET_TIME_UNIT_FOREVER_REL,
2309 &send_core_data_multicast,
2313 info->peer->core_transmit[info->handler_n] = NULL;
2314 info->peer->infos[info->handler_n] = NULL;
2315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2316 memcpy (buf, info->data, total_size);
2319 struct GNUNET_MESH_Multicast *mc;
2320 struct GNUNET_MessageHeader *mh;
2323 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2325 mc = (struct GNUNET_MESH_Multicast *) mh;
2326 mh = (struct GNUNET_MessageHeader *) &mc[1];
2327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2328 "MESH: multicast, payload type %u\n",
2330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2331 "MESH: multicast, payload size %u\n",
2336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2342 data_descriptor_decrement_multicast (info);
2343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2351 * Function called to notify a client about the socket
2352 * being ready to queue more data. "buf" will be
2353 * NULL and "size" zero if the socket was closed for
2354 * writing in the meantime.
2356 * @param cls closure (MeshDataDescriptor)
2357 * @param size number of bytes available in buf
2358 * @param buf where the callee should write the message
2359 * @return number of bytes written to buf
2362 send_core_path_ack (void *cls, size_t size, void *buf)
2364 struct MeshDataDescriptor *info = cls;
2365 struct GNUNET_MESH_PathACK *msg = buf;
2367 GNUNET_assert (NULL != info);
2370 info->peer->core_transmit[info->handler_n] = NULL;
2372 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2377 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2378 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2379 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2380 msg->tid = htonl (info->origin->tid);
2381 msg->peer_id = my_full_id;
2383 /* TODO add signature */
2385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2386 return sizeof (struct GNUNET_MESH_PathACK);
2390 /******************************************************************************/
2391 /******************** MESH NETWORK HANDLERS **************************/
2392 /******************************************************************************/
2396 * Core handler for path creation
2398 * @param cls closure
2399 * @param message message
2400 * @param peer peer identity this notification is about
2401 * @param atsi performance data
2402 * @param atsi_count number of records in 'atsi'
2404 * @return GNUNET_OK to keep the connection open,
2405 * GNUNET_SYSERR to close it (signal serious error)
2408 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2409 const struct GNUNET_MessageHeader *message,
2410 const struct GNUNET_ATS_Information *atsi,
2411 unsigned int atsi_count)
2413 unsigned int own_pos;
2416 MESH_TunnelNumber tid;
2417 struct GNUNET_MESH_ManipulatePath *msg;
2418 struct GNUNET_PeerIdentity *pi;
2419 GNUNET_HashCode hash;
2420 struct MeshPeerPath *path;
2421 struct MeshPeerInfo *dest_peer_info;
2422 struct MeshPeerInfo *orig_peer_info;
2423 struct MeshTunnel *t;
2425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2426 "MESH: Received a path create msg [%s]\n",
2427 GNUNET_i2s(&my_full_id));
2428 size = ntohs (message->size);
2429 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2431 GNUNET_break_op (0);
2435 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2436 if (size % sizeof (struct GNUNET_PeerIdentity))
2438 GNUNET_break_op (0);
2441 size /= sizeof (struct GNUNET_PeerIdentity);
2444 GNUNET_break_op (0);
2447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2448 "MESH: path has %u hops.\n",
2450 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2452 tid = ntohl (msg->tid);
2453 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2454 t = tunnel_get (pi, tid);
2455 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2456 "MESH: path is for tunnel %s [%X].\n",
2461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2462 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2463 t->id.oid = GNUNET_PEER_intern (pi);
2465 t->local_tid = next_local_tid++;
2466 /* FIXME test if taken */
2467 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2468 t->tree = tree_new(t, t->id.oid);
2470 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2472 GNUNET_CONTAINER_multihashmap_put (
2476 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2482 tunnel_reset_timeout (t);
2483 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2485 GNUNET_CONTAINER_multihashmap_put (
2489 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2497 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2498 if (NULL == dest_peer_info)
2500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2501 "MESH: Creating PeerInfo for destination.\n");
2502 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2503 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2504 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2506 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2508 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2509 if (NULL == orig_peer_info)
2511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2512 "MESH: Creating PeerInfo for origin.\n");
2513 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2514 orig_peer_info->id = GNUNET_PEER_intern (pi);
2515 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2516 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2519 path = path_new (size);
2521 for (i = 0; i < size; i++)
2523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2524 "MESH: ... adding %s\n",
2525 GNUNET_i2s(&pi[i]));
2526 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2527 if (path->peers[i] == myid)
2530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2531 "MESH: Own position: %u\n", own_pos);
2534 /* cannot be self, must be 'not found' */
2535 /* create path: self not found in path through self */
2536 GNUNET_break_op (0);
2537 path_destroy (path);
2538 /* FIXME error. destroy tunnel? leave for timeout? */
2541 tunnel_add_path (t, path, own_pos);
2542 if (own_pos == size - 1)
2544 /* It is for us! Send ack. */
2545 struct GNUNET_MESH_TunnelNotification cmsg;
2546 struct MeshDataDescriptor *info;
2549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2550 "MESH: It's for us!\n");
2551 path_add_to_origin (orig_peer_info, path);
2552 if (NULL == t->peers)
2553 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2554 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2556 &my_full_id.hashPubKey,
2557 peer_info_get(&my_full_id),
2558 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2559 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2560 info->origin = &t->id;
2561 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2562 GNUNET_assert (NULL != info->peer);
2563 j = peer_info_transmit_slot(info->peer);
2564 info->handler_n = j;
2565 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2566 info->peer->infos[j] = info;
2567 info->peer->core_transmit[j] =
2568 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2569 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2570 sizeof (struct GNUNET_MESH_PathACK),
2571 &send_core_path_ack, info);
2572 cmsg.header.size = htons(sizeof(cmsg));
2573 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2574 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2575 cmsg.tunnel_id = htonl(t->local_tid);
2576 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2580 struct MeshPeerPath *path2;
2582 /* It's for somebody else! Retransmit. */
2583 path2 = path_duplicate(path);
2584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2585 "MESH: Retransmitting.\n");
2586 path_add_to_peer(dest_peer_info, path);
2587 path = path_duplicate(path2);
2588 path_add_to_origin(orig_peer_info, path2);
2589 send_create_path(dest_peer_info, path, t);
2596 * Core handler for path destruction
2598 * @param cls closure
2599 * @param message message
2600 * @param peer peer identity this notification is about
2601 * @param atsi performance data
2602 * @param atsi_count number of records in 'atsi'
2604 * @return GNUNET_OK to keep the connection open,
2605 * GNUNET_SYSERR to close it (signal serious error)
2608 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2609 const struct GNUNET_MessageHeader *message,
2610 const struct GNUNET_ATS_Information *atsi,
2611 unsigned int atsi_count)
2613 struct GNUNET_MESH_ManipulatePath *msg;
2614 struct GNUNET_PeerIdentity *pi;
2615 struct MeshPeerPath *path;
2616 struct MeshTunnel *t;
2617 unsigned int own_pos;
2621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2622 "MESH: Received a PATH DESTROY msg from %s\n",
2624 size = ntohs (message->size);
2625 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2627 GNUNET_break_op (0);
2631 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2632 if (size % sizeof (struct GNUNET_PeerIdentity))
2634 GNUNET_break_op (0);
2637 size /= sizeof (struct GNUNET_PeerIdentity);
2640 GNUNET_break_op (0);
2643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2644 "MESH: path has %u hops.\n",
2647 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2648 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2650 "MESH: path is for tunnel %s [%X].\n",
2653 t = tunnel_get (pi, ntohl (msg->tid));
2656 /* TODO notify back: we don't know this tunnel */
2657 GNUNET_break_op (0);
2660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2661 path = path_new (size);
2663 for (i = 0; i < size; i++)
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2666 "MESH: ... adding %s\n",
2667 GNUNET_i2s(&pi[i]));
2668 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2669 if (path->peers[i] == myid)
2672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2673 "MESH: Own position: %u\n", own_pos);
2674 if (own_pos < path->length - 1)
2675 send_message (message, &pi[own_pos + 1]);
2676 tunnel_delete_peer (t, path->peers[path->length - 1]);
2677 path_destroy (path);
2683 * Core handler for notifications of broken paths
2685 * @param cls closure
2686 * @param message message
2687 * @param peer peer identity this notification is about
2688 * @param atsi performance data
2689 * @param atsi_count number of records in 'atsi'
2691 * @return GNUNET_OK to keep the connection open,
2692 * GNUNET_SYSERR to close it (signal serious error)
2695 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2696 const struct GNUNET_MessageHeader *message,
2697 const struct GNUNET_ATS_Information *atsi,
2698 unsigned int atsi_count)
2700 struct GNUNET_MESH_PathBroken *msg;
2701 struct MeshTunnel *t;
2703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2704 "MESH: Received a PATH BROKEN msg from %s\n",
2706 msg = (struct GNUNET_MESH_PathBroken *) message;
2707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2708 "MESH: regarding %s\n",
2709 GNUNET_i2s(&msg->peer1));
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2711 "MESH: regarding %s\n",
2712 GNUNET_i2s(&msg->peer2));
2713 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2716 GNUNET_break_op (0);
2719 tunnel_notify_connection_broken(t,
2720 GNUNET_PEER_search(&msg->peer1),
2721 GNUNET_PEER_search(&msg->peer2));
2728 * Core handler for tunnel destruction
2730 * @param cls closure
2731 * @param message message
2732 * @param peer peer identity this notification is about
2733 * @param atsi performance data
2734 * @param atsi_count number of records in 'atsi'
2736 * @return GNUNET_OK to keep the connection open,
2737 * GNUNET_SYSERR to close it (signal serious error)
2740 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2741 const struct GNUNET_MessageHeader *message,
2742 const struct GNUNET_ATS_Information *atsi,
2743 unsigned int atsi_count)
2745 struct GNUNET_MESH_TunnelDestroy *msg;
2746 struct MeshTunnel *t;
2748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2749 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2751 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2753 "MESH: for tunnel %s [%u]\n",
2754 GNUNET_i2s (&msg->oid),
2756 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2759 /* Probably already got the message from another path,
2760 * destroyed the tunnel and retransmitted to children.
2765 if (t->id.oid == myid)
2767 GNUNET_break_op (0);
2770 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2772 /* Tunnel was incoming, notify clients */
2773 send_clients_tunnel_destroy (t);
2775 tunnel_send_destroy (t);
2782 * Core handler for mesh network traffic going from the origin to a peer
2784 * @param cls closure
2785 * @param peer peer identity this notification is about
2786 * @param message message
2787 * @param atsi performance data
2788 * @param atsi_count number of records in 'atsi'
2789 * @return GNUNET_OK to keep the connection open,
2790 * GNUNET_SYSERR to close it (signal serious error)
2793 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2794 const struct GNUNET_MessageHeader *message,
2795 const struct GNUNET_ATS_Information *atsi,
2796 unsigned int atsi_count)
2798 struct GNUNET_MESH_Unicast *msg;
2799 struct MeshTunnel *t;
2803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2804 "MESH: got a unicast packet from %s\n",
2806 size = ntohs (message->size);
2808 sizeof (struct GNUNET_MESH_Unicast) +
2809 sizeof (struct GNUNET_MessageHeader))
2814 msg = (struct GNUNET_MESH_Unicast *) message;
2815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2816 "MESH: of type %u\n",
2817 ntohs (msg[1].header.type));
2818 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2821 /* TODO notify back: we don't know this tunnel */
2822 GNUNET_break_op (0);
2825 tunnel_reset_timeout (t);
2826 pid = GNUNET_PEER_search(&msg->destination);
2829 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2830 "MESH: it's for us! sending to clients...\n");
2831 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2835 "MESH: not for us, retransmitting...\n");
2836 send_message (message, path_get_first_hop(t->tree, pid));
2842 * Core handler for mesh network traffic going from the origin to all peers
2844 * @param cls closure
2845 * @param message message
2846 * @param peer peer identity this notification is about
2847 * @param atsi performance data
2848 * @param atsi_count number of records in 'atsi'
2849 * @return GNUNET_OK to keep the connection open,
2850 * GNUNET_SYSERR to close it (signal serious error)
2852 * TODO: Check who we got this from, to validate route.
2855 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2856 const struct GNUNET_MessageHeader *message,
2857 const struct GNUNET_ATS_Information *atsi,
2858 unsigned int atsi_count)
2860 struct GNUNET_MESH_Multicast *msg;
2861 struct MeshTunnel *t;
2864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2865 "MESH: got a multicast packet from %s\n",
2867 size = ntohs (message->size);
2868 if (sizeof (struct GNUNET_MESH_Multicast) +
2869 sizeof (struct GNUNET_MessageHeader) > size)
2871 GNUNET_break_op (0);
2874 msg = (struct GNUNET_MESH_Multicast *) message;
2875 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2879 /* TODO notify that we dont know that tunnel */
2880 GNUNET_break_op (0);
2883 tunnel_reset_timeout (t);
2885 /* Transmit to locally interested clients */
2886 if (NULL != t->peers &&
2887 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2889 send_subscribed_clients (message, &msg[1].header);
2891 tunnel_send_multicast(t, message);
2897 * Core handler for mesh network traffic toward the owner of a tunnel
2899 * @param cls closure
2900 * @param message message
2901 * @param peer peer identity this notification is about
2902 * @param atsi performance data
2903 * @param atsi_count number of records in 'atsi'
2905 * @return GNUNET_OK to keep the connection open,
2906 * GNUNET_SYSERR to close it (signal serious error)
2909 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2910 const struct GNUNET_MessageHeader *message,
2911 const struct GNUNET_ATS_Information *atsi,
2912 unsigned int atsi_count)
2914 struct GNUNET_MESH_ToOrigin *msg;
2915 struct GNUNET_PeerIdentity id;
2916 struct MeshPeerInfo *peer_info;
2917 struct MeshTunnel *t;
2920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2921 "MESH: got a ToOrigin packet from %s\n",
2923 size = ntohs (message->size);
2924 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2925 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2927 GNUNET_break_op (0);
2930 msg = (struct GNUNET_MESH_ToOrigin *) message;
2931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2932 "MESH: of type %u\n",
2933 ntohs (msg[1].header.type));
2934 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2938 /* TODO notify that we dont know this tunnel (whom)? */
2939 GNUNET_break_op (0);
2943 if (t->id.oid == myid)
2946 struct GNUNET_MESH_ToOrigin *copy;
2948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2949 "MESH: it's for us! sending to clients...\n");
2950 if (NULL == t->client)
2952 /* got data packet for ownerless tunnel */
2953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2954 "MESH: no clients!\n");
2955 GNUNET_break_op (0);
2958 /* TODO signature verification */
2959 memcpy (cbuf, message, size);
2960 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2961 copy->tid = htonl (t->local_tid);
2962 GNUNET_SERVER_notification_context_unicast (nc,
2968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2969 "MESH: not for us, retransmitting...\n");
2971 peer_info = peer_info_get (&msg->oid);
2972 if (NULL == peer_info)
2974 /* unknown origin of tunnel */
2978 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2979 send_message (message, &id);
2986 * Core handler for path ACKs
2988 * @param cls closure
2989 * @param message message
2990 * @param peer peer identity this notification is about
2991 * @param atsi performance data
2992 * @param atsi_count number of records in 'atsi'
2994 * @return GNUNET_OK to keep the connection open,
2995 * GNUNET_SYSERR to close it (signal serious error)
2998 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2999 const struct GNUNET_MessageHeader *message,
3000 const struct GNUNET_ATS_Information *atsi,
3001 unsigned int atsi_count)
3003 struct GNUNET_MESH_PathACK *msg;
3004 struct GNUNET_PeerIdentity id;
3005 struct MeshTunnelTreeNode *n;
3006 struct MeshPeerInfo *peer_info;
3007 struct MeshTunnel *t;
3009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3010 "MESH: Received a path ACK msg [%s]\n",
3011 GNUNET_i2s(&my_full_id));
3012 msg = (struct GNUNET_MESH_PathACK *) message;
3013 t = tunnel_get (&msg->oid, msg->tid);
3016 /* TODO notify that we don't know the tunnel */
3020 /* Message for us? */
3021 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
3024 if (NULL == t->client)
3026 GNUNET_break_op (0);
3029 if (NULL != t->dht_get_type)
3031 GNUNET_DHT_get_stop (t->dht_get_type);
3032 t->dht_get_type = NULL;
3034 peer_info = peer_info_get (&msg->peer_id);
3035 n = tree_find_peer(t->tree->root, peer_info->id);
3038 GNUNET_break_op (0);
3041 n->status = MESH_PEER_READY;
3042 send_client_peer_connected(t, peer_info->id);
3046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3047 "MESH: not for us, retransmitting...\n");
3048 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
3049 peer_info = peer_info_get (&msg->oid);
3050 if (NULL == peer_info)
3052 /* If we know the tunnel, we should DEFINITELY know the peer */
3056 send_message (message, &id);
3062 * Functions to handle messages from core
3064 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3065 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3066 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3067 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3068 sizeof (struct GNUNET_MESH_PathBroken)},
3069 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3070 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3071 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3072 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3073 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3074 sizeof (struct GNUNET_MESH_PathACK)},
3080 /******************************************************************************/
3081 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3082 /******************************************************************************/
3085 * deregister_app: iterator for removing each application registered by a client
3087 * @param cls closure
3088 * @param key the hash of the application id (used to access the hashmap)
3089 * @param value the value stored at the key (client)
3091 * @return GNUNET_OK on success
3094 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3096 GNUNET_break (GNUNET_YES ==
3097 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
3103 * notify_client_connection_failure: notify a client that the connection to the
3104 * requested remote peer is not possible (for instance, no route found)
3105 * Function called when the socket is ready to queue more data. "buf" will be
3106 * NULL and "size" zero if the socket was closed for writing in the meantime.
3108 * @param cls closure
3109 * @param size number of bytes available in buf
3110 * @param buf where the callee should write the message
3111 * @return number of bytes written to buf
3114 notify_client_connection_failure (void *cls, size_t size, void *buf)
3117 struct MeshPeerInfo *peer_info;
3118 struct GNUNET_MESH_PeerControl *msg;
3119 struct GNUNET_PeerIdentity id;
3121 if (0 == size && NULL == buf)
3123 // TODO retry? cancel?
3127 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3128 peer_info = (struct MeshPeerInfo *) cls;
3129 msg = (struct GNUNET_MESH_PeerControl *) buf;
3130 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3131 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3132 // msg->tunnel_id = htonl(peer_info->t->tid);
3133 GNUNET_PEER_resolve (peer_info->id, &id);
3134 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3142 * Send keepalive packets for a peer
3144 * @param cls Closure (tunnel for which to send the keepalive).
3145 * @param tc Notification context.
3147 * TODO: implement explicit multicast keepalive?
3150 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3152 struct MeshTunnel *t = cls;
3153 struct GNUNET_MessageHeader *payload;
3154 struct GNUNET_MESH_Multicast *msg;
3155 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3156 sizeof(struct GNUNET_MessageHeader);
3159 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3163 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3165 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3166 "MESH: sending keepalive for tunnel %d\n",
3169 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3170 msg->header.size = htons (size);
3171 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3172 msg->oid = my_full_id;
3173 msg->tid = htonl(t->id.tid);
3174 payload = (struct GNUNET_MessageHeader *) &msg[1];
3175 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3176 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3177 tunnel_send_multicast (t, &msg->header);
3179 t->path_refresh_task =
3180 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3186 * Function to process paths received for a new peer addition. The recorded
3187 * paths form the initial tunnel, which can be optimized later.
3188 * Called on each result obtained for the DHT search.
3190 * @param cls closure
3191 * @param exp when will this value expire
3192 * @param key key of the result
3193 * @param type type of the result
3194 * @param size number of bytes in data
3195 * @param data pointer to the result data
3197 * TODO: re-issue the request after certain time? cancel after X results?
3200 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3201 const GNUNET_HashCode * key,
3202 const struct GNUNET_PeerIdentity *get_path,
3203 unsigned int get_path_length,
3204 const struct GNUNET_PeerIdentity *put_path,
3205 unsigned int put_path_length,
3206 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3208 struct MeshPathInfo *path_info = cls;
3209 struct MeshPeerPath *p;
3210 struct GNUNET_PeerIdentity pi;
3213 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3214 "MESH: Got results from DHT!\n");
3215 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3216 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3219 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3220 // path_info->peer->dhtget = NULL;
3222 p = path_build_from_dht (get_path, get_path_length,
3223 put_path, put_path_length);
3224 path_add_to_peer (path_info->peer, p);
3225 for (i = 0; i < path_info->peer->ntunnels; i++)
3227 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3228 peer_info_connect(path_info->peer, path_info->t);
3230 // GNUNET_free (path_info);
3237 * Function to process paths received for a new peer addition. The recorded
3238 * paths form the initial tunnel, which can be optimized later.
3239 * Called on each result obtained for the DHT search.
3241 * @param cls closure
3242 * @param exp when will this value expire
3243 * @param key key of the result
3244 * @param type type of the result
3245 * @param size number of bytes in data
3246 * @param data pointer to the result data
3249 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3250 const GNUNET_HashCode * key,
3251 const struct GNUNET_PeerIdentity *get_path,
3252 unsigned int get_path_length,
3253 const struct GNUNET_PeerIdentity *put_path,
3254 unsigned int put_path_length,
3255 enum GNUNET_BLOCK_Type type, size_t size,
3258 const struct GNUNET_PeerIdentity *pi = data;
3259 struct MeshTunnel *t = cls;
3260 struct MeshPeerInfo *peer_info;
3261 struct MeshPeerPath *p;
3263 if (size != sizeof (struct GNUNET_PeerIdentity))
3265 GNUNET_break_op (0);
3268 GNUNET_assert (NULL != t->client);
3269 peer_info = peer_info_get (pi);
3270 (void) GNUNET_CONTAINER_multihashmap_put (
3274 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3276 p = path_build_from_dht (get_path, get_path_length,
3277 put_path, put_path_length);
3278 path_add_to_peer (peer_info, p);
3279 tunnel_add_peer(t, peer_info);
3280 peer_info_connect (peer_info, t);
3284 /******************************************************************************/
3285 /********************* MESH LOCAL HANDLES **************************/
3286 /******************************************************************************/
3290 * Handler for client disconnection
3292 * @param cls closure
3293 * @param client identification of the client; NULL
3294 * for the last call when the server is destroyed
3297 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3299 struct MeshClient *c;
3300 struct MeshClient *next;
3302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3311 if (c->handle != client && NULL != client)
3313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3318 GNUNET_SERVER_client_drop (c->handle);
3319 if (NULL != c->tunnels)
3321 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3322 &tunnel_destroy_iterator,
3324 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3327 /* deregister clients applications */
3328 if (NULL != c->apps)
3330 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3331 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3333 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3334 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3336 GNUNET_SCHEDULER_cancel (announce_applications_task);
3337 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3339 if (NULL != c->types)
3340 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3342 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3354 * Handler for new clients
3356 * @param cls closure
3357 * @param client identification of the client
3358 * @param message the actual message, which includes messages the client wants
3361 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3362 const struct GNUNET_MessageHeader *message)
3364 struct GNUNET_MESH_ClientConnect *cc_msg;
3365 struct MeshClient *c;
3366 GNUNET_MESH_ApplicationType *a;
3373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3374 /* Check data sanity */
3375 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3376 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3377 ntypes = ntohs (cc_msg->types);
3378 napps = ntohs (cc_msg->applications);
3380 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3383 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3387 /* Create new client structure */
3388 c = GNUNET_malloc (sizeof (struct MeshClient));
3390 c->id = next_client_id++;
3392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id, c);
3394 GNUNET_SERVER_client_keep (client);
3395 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3398 GNUNET_MESH_ApplicationType at;
3401 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3402 for (i = 0; i < napps; i++)
3405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3406 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3407 /* store in clients hashmap */
3408 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3409 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3410 /* store in global hashmap, for announcements */
3411 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3412 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3414 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3415 announce_applications_task =
3416 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3424 t = (uint16_t *) & a[napps];
3425 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3426 for (i = 0; i < ntypes; i++)
3429 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3431 /* store in clients hashmap */
3432 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3433 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3434 /* store in global hashmap */
3435 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3436 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3440 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3442 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3443 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3444 GNUNET_SERVER_notification_context_add (nc, client);
3446 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3454 * Handler for requests of new tunnels
3456 * @param cls closure
3457 * @param client identification of the client
3458 * @param message the actual message
3461 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3462 const struct GNUNET_MessageHeader *message)
3464 struct GNUNET_MESH_TunnelMessage *t_msg;
3465 struct MeshTunnel *t;
3466 struct MeshClient *c;
3467 GNUNET_HashCode hash;
3469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3471 /* Sanity check for client registration */
3472 if (NULL == (c = client_get (client)))
3475 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3482 /* Message sanity check */
3483 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3486 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3490 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3491 /* Sanity check for tunnel numbering */
3492 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3495 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3498 /* Sanity check for duplicate tunnel IDs */
3499 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3502 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3506 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3507 while (NULL != tunnel_get_by_pi (myid, next_tid))
3508 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3509 t->id.tid = next_tid++;
3511 t->local_tid = ntohl (t_msg->tunnel_id);
3513 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3514 "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3515 GNUNET_i2s (&my_full_id),
3520 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3522 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3524 GNUNET_CONTAINER_multihashmap_put (
3525 c->tunnels, &hash, t,
3526 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3529 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3533 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3535 GNUNET_CONTAINER_multihashmap_put (
3537 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3540 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3543 t->tree = tree_new (t, myid);
3544 t->tree->refresh = REFRESH_PATH_TIME;
3545 t->tree->root->status = MESH_PEER_READY;
3546 t->tree->me = t->tree->root;
3548 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3554 * Handler for requests of deleting tunnels
3556 * @param cls closure
3557 * @param client identification of the client
3558 * @param message the actual message
3561 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3562 const struct GNUNET_MessageHeader *message)
3564 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3565 struct MeshClient *c;
3566 struct MeshTunnel *t;
3567 MESH_TunnelNumber tid;
3568 GNUNET_HashCode hash;
3570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3571 "MESH: Got a DESTROY TUNNEL from client!\n");
3573 /* Sanity check for client registration */
3574 if (NULL == (c = client_get (client)))
3577 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3580 /* Message sanity check */
3581 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3584 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3590 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3592 /* Retrieve tunnel */
3593 tid = ntohl (tunnel_msg->tunnel_id);
3595 /* Remove from local id hashmap */
3596 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3597 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3598 GNUNET_assert (GNUNET_YES ==
3599 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t));
3602 tunnel_send_destroy (t);
3604 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3610 * Handler for connection requests to new peers
3612 * @param cls closure
3613 * @param client identification of the client
3614 * @param message the actual message (PeerControl)
3617 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3618 const struct GNUNET_MessageHeader *message)
3620 struct GNUNET_MESH_PeerControl *peer_msg;
3621 struct MeshPeerInfo *peer_info;
3622 struct MeshClient *c;
3623 struct MeshTunnel *t;
3624 MESH_TunnelNumber tid;
3626 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3627 /* Sanity check for client registration */
3628 if (NULL == (c = client_get (client)))
3631 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3635 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3636 /* Sanity check for message size */
3637 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3640 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3644 /* Tunnel exists? */
3645 tid = ntohl (peer_msg->tunnel_id);
3646 t = tunnel_get_by_local_id (c, tid);
3650 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3654 /* Does client own tunnel? */
3655 if (t->client->handle != client)
3658 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3661 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3662 GNUNET_i2s(&peer_msg->peer));
3663 peer_info = peer_info_get (&peer_msg->peer);
3665 tunnel_add_peer(t, peer_info);
3666 peer_info_connect(peer_info, t);
3668 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3674 * Handler for disconnection requests of peers in a tunnel
3676 * @param cls closure
3677 * @param client identification of the client
3678 * @param message the actual message (PeerControl)
3681 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3682 const struct GNUNET_MessageHeader *message)
3684 struct GNUNET_MESH_PeerControl *peer_msg;
3685 struct MeshPeerInfo *peer_info;
3686 struct MeshClient *c;
3687 struct MeshTunnel *t;
3688 MESH_TunnelNumber tid;
3690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3691 /* Sanity check for client registration */
3692 if (NULL == (c = client_get (client)))
3695 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3698 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3699 /* Sanity check for message size */
3700 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3703 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3707 /* Tunnel exists? */
3708 tid = ntohl (peer_msg->tunnel_id);
3709 t = tunnel_get_by_local_id (c, tid);
3713 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3716 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3718 /* Does client own tunnel? */
3719 if (t->client->handle != client)
3722 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3726 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3727 "MESH: for peer %s\n",
3728 GNUNET_i2s(&peer_msg->peer));
3729 /* Is the peer in the tunnel? */
3730 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3731 &peer_msg->peer.hashPubKey);
3732 if (NULL == peer_info)
3735 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3739 /* Ok, delete peer from tunnel */
3740 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3741 &peer_msg->peer.hashPubKey);
3743 send_destroy_path (t, peer_info->id);
3744 tunnel_delete_peer(t, peer_info->id);
3745 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3751 * Handler for connection requests to new peers by type
3753 * @param cls closure
3754 * @param client identification of the client
3755 * @param message the actual message (ConnectPeerByType)
3758 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3759 const struct GNUNET_MessageHeader *message)
3761 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3762 struct MeshClient *c;
3763 struct MeshTunnel *t;
3764 GNUNET_HashCode hash;
3765 MESH_TunnelNumber tid;
3767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3768 /* Sanity check for client registration */
3769 if (NULL == (c = client_get (client)))
3772 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3776 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3777 /* Sanity check for message size */
3778 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3779 ntohs (connect_msg->header.size))
3782 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3786 /* Tunnel exists? */
3787 tid = ntohl (connect_msg->tunnel_id);
3788 t = tunnel_get_by_local_id (c, tid);
3792 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3796 /* Does client own tunnel? */
3797 if (t->client->handle != client)
3800 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3804 /* Do WE have the service? */
3805 t->type = ntohl (connect_msg->type);
3806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3807 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3808 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3811 /* Yes! Fast forward, add ourselves to the tunnel and send the
3812 * good news to the client
3814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3815 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3816 peer_info_get (&my_full_id),
3817 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3820 send_client_peer_connected(t, myid);
3821 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3822 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3825 /* Ok, lets find a peer offering the service */
3826 if (NULL != t->dht_get_type)
3828 GNUNET_DHT_get_stop (t->dht_get_type);
3830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3831 GNUNET_h2s (&hash));
3833 GNUNET_DHT_get_start (dht_handle,
3834 GNUNET_TIME_UNIT_FOREVER_REL,
3835 GNUNET_BLOCK_TYPE_TEST,
3838 GNUNET_DHT_RO_RECORD_ROUTE |
3839 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3841 &dht_get_type_handler, t);
3843 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3849 * Handler for client traffic directed to one peer
3851 * @param cls closure
3852 * @param client identification of the client
3853 * @param message the actual message
3856 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3857 const struct GNUNET_MessageHeader *message)
3859 struct MeshClient *c;
3860 struct MeshTunnel *t;
3861 struct MeshPeerInfo *pi;
3862 struct GNUNET_MESH_Unicast *data_msg;
3863 MESH_TunnelNumber tid;
3866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3867 "MESH: Got a unicast request from a client!\n");
3869 /* Sanity check for client registration */
3870 if (NULL == (c = client_get (client)))
3873 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3876 data_msg = (struct GNUNET_MESH_Unicast *) message;
3877 /* Sanity check for message size */
3878 size = ntohs (message->size);
3879 if (sizeof (struct GNUNET_MESH_Unicast) +
3880 sizeof (struct GNUNET_MessageHeader) > size)
3883 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3887 /* Tunnel exists? */
3888 tid = ntohl (data_msg->tid);
3889 t = tunnel_get_by_local_id (c, tid);
3893 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3897 /* Is it a local tunnel? Then, does client own the tunnel? */
3898 if (NULL != t->client &&
3899 NULL != t->client->handle &&
3900 t->client->handle != client)
3903 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3907 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3908 &data_msg->destination.hashPubKey);
3909 /* Is the selected peer in the tunnel? */
3913 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3917 /* Ok, everything is correct, send the message
3918 * (pretend we got it from a mesh peer)
3921 char buf[ntohs (message->size)];
3922 struct GNUNET_MESH_Unicast *copy;
3924 /* Work around const limitation */
3925 copy = (struct GNUNET_MESH_Unicast *) buf;
3926 memcpy (buf, data_msg, size);
3927 copy->oid = my_full_id;
3928 copy->tid = htonl (t->id.tid);
3929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3930 "MESH: calling generic handler...\n");
3931 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3933 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3939 * Handler for client traffic directed to the origin
3941 * @param cls closure
3942 * @param client identification of the client
3943 * @param message the actual message
3946 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3947 const struct GNUNET_MessageHeader *message)
3949 struct GNUNET_MESH_ToOrigin *data_msg;
3950 struct GNUNET_PeerIdentity id;
3951 struct MeshClient *c;
3952 struct MeshTunnel *t;
3953 MESH_TunnelNumber tid;
3956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3957 "MESH: Got a ToOrigin request from a client!\n");
3959 /* Sanity check for client registration */
3960 if (NULL == (c = client_get (client)))
3963 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3966 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3967 /* Sanity check for message size */
3968 size = ntohs (message->size);
3969 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3970 sizeof (struct GNUNET_MessageHeader) > size)
3973 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3977 /* Tunnel exists? */
3978 tid = ntohl (data_msg->tid);
3979 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3982 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3985 t = tunnel_get_by_local_id (c, tid);
3989 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3993 /* It shouldn't be a local tunnel. */
3994 if (NULL != t->client)
3997 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4000 GNUNET_PEER_resolve(t->id.oid, &id);
4002 /* Ok, everything is correct, send the message
4003 * (pretend we got it from a mesh peer)
4006 char buf[ntohs (message->size)];
4007 struct GNUNET_MESH_ToOrigin *copy;
4009 /* Work around const limitation */
4010 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4011 memcpy (buf, data_msg, size);
4013 copy->tid = htonl (t->id.tid);
4014 copy->sender = my_full_id;
4015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4016 "MESH: calling generic handler...\n");
4017 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
4019 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4025 * Handler for client traffic directed to all peers in a tunnel
4027 * @param cls closure
4028 * @param client identification of the client
4029 * @param message the actual message
4032 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
4033 const struct GNUNET_MessageHeader *message)
4035 struct MeshClient *c;
4036 struct MeshTunnel *t;
4037 struct GNUNET_MESH_Multicast *data_msg;
4038 MESH_TunnelNumber tid;
4040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4041 "MESH: Got a multicast request from a client!\n");
4043 /* Sanity check for client registration */
4044 if (NULL == (c = client_get (client)))
4047 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4050 data_msg = (struct GNUNET_MESH_Multicast *) message;
4051 /* Sanity check for message size */
4052 if (sizeof (struct GNUNET_MESH_Multicast) +
4053 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4056 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4060 /* Tunnel exists? */
4061 tid = ntohl (data_msg->tid);
4062 t = tunnel_get_by_local_id (c, tid);
4066 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4070 /* Does client own tunnel? */
4071 if (t->client->handle != client)
4074 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4079 char buf[ntohs(message->size)];
4080 struct GNUNET_MESH_Multicast *copy;
4082 copy = (struct GNUNET_MESH_Multicast *)buf;
4083 memcpy(buf, message, ntohs(message->size));
4084 copy->oid = my_full_id;
4085 copy->tid = htonl(t->id.tid);
4086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4087 "MESH: calling generic handler...\n");
4088 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
4091 /* receive done gets called when last copy is sent to a neighbor */
4096 * Functions to handle messages from clients
4098 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4099 {&handle_local_new_client, NULL,
4100 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4101 {&handle_local_tunnel_create, NULL,
4102 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4103 sizeof (struct GNUNET_MESH_TunnelMessage)},
4104 {&handle_local_tunnel_destroy, NULL,
4105 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4106 sizeof (struct GNUNET_MESH_TunnelMessage)},
4107 {&handle_local_connect_add, NULL,
4108 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4109 sizeof (struct GNUNET_MESH_PeerControl)},
4110 {&handle_local_connect_del, NULL,
4111 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4112 sizeof (struct GNUNET_MESH_PeerControl)},
4113 {&handle_local_connect_by_type, NULL,
4114 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4115 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4116 {&handle_local_unicast, NULL,
4117 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4118 {&handle_local_to_origin, NULL,
4119 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4120 {&handle_local_multicast, NULL,
4121 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4127 * To be called on core init/fail.
4129 * @param cls service closure
4130 * @param server handle to the server for this service
4131 * @param identity the public identity of this peer
4134 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4135 const struct GNUNET_PeerIdentity *identity)
4137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4138 core_handle = server;
4139 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4141 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4142 GNUNET_SCHEDULER_shutdown();
4148 * Method called whenever a given peer connects.
4150 * @param cls closure
4151 * @param peer peer identity this notification is about
4152 * @param atsi performance data for the connection
4153 * @param atsi_count number of records in 'atsi'
4156 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4157 const struct GNUNET_ATS_Information *atsi,
4158 unsigned int atsi_count)
4160 struct MeshPeerInfo *peer_info;
4161 struct MeshPeerPath *path;
4163 #if MESH_DEBUG_CONNECTION
4164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4165 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4166 GNUNET_i2s(&my_full_id));
4168 peer_info = peer_info_get (peer);
4169 if (myid == peer_info->id)
4171 #if MESH_DEBUG_CONNECTION
4172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4176 #if MESH_DEBUG_CONNECTION
4179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4183 path = path_new (2);
4184 path->peers[0] = myid;
4185 path->peers[1] = peer_info->id;
4186 GNUNET_PEER_change_rc(myid, 1);
4187 GNUNET_PEER_change_rc(peer_info->id, 1);
4188 path_add_to_peer (peer_info, path);
4193 * Method called whenever a peer disconnects.
4195 * @param cls closure
4196 * @param peer peer identity this notification is about
4199 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4201 struct MeshPeerInfo *pi;
4204 #if MESH_DEBUG_CONNECTION
4205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4207 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4213 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4215 /* TODO: notify that the transmission failed */
4216 peer_info_cancel_transmission(pi, i);
4218 path_remove_from_peer (pi, pi->id, myid);
4219 #if MESH_DEBUG_CONNECTION
4222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4229 /******************************************************************************/
4230 /************************ MAIN FUNCTIONS ****************************/
4231 /******************************************************************************/
4234 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4236 * @param cls closure
4237 * @param key current key code
4238 * @param value value in the hash map
4239 * @return GNUNET_YES if we should continue to iterate,
4243 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4245 struct MeshTunnel *t = value;
4251 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4253 * @param cls closure
4254 * @param key current key code
4255 * @param value value in the hash map
4256 * @return GNUNET_YES if we should continue to iterate,
4260 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4262 struct MeshPeerInfo *p = value;
4263 peer_info_destroy (p);
4268 * Task run during shutdown.
4274 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4276 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4277 /* TODO: destroy tunnels? */
4278 if (core_handle != NULL)
4280 GNUNET_CORE_disconnect (core_handle);
4283 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4284 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4285 if (dht_handle != NULL)
4287 GNUNET_DHT_disconnect (dht_handle);
4292 GNUNET_SERVER_notification_context_destroy (nc);
4295 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4297 GNUNET_SCHEDULER_cancel (announce_id_task);
4298 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4304 * Process mesh requests.
4306 * @param cls closure
4307 * @param server the initialized server
4308 * @param c configuration to use
4311 run (void *cls, struct GNUNET_SERVER_Handle *server,
4312 const struct GNUNET_CONFIGURATION_Handle *c)
4314 struct MeshPeerInfo *peer;
4315 struct MeshPeerPath *p;
4318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4319 server_handle = server;
4320 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4321 CORE_QUEUE_SIZE, /* queue size */
4322 NULL, /* Closure passed to MESH functions */
4323 &core_init, /* Call core_init once connected */
4324 &core_connect, /* Handle connects */
4325 &core_disconnect, /* remove peers on disconnects */
4326 NULL, /* Don't notify about all incoming messages */
4327 GNUNET_NO, /* For header only in notification */
4328 NULL, /* Don't notify about all outbound messages */
4329 GNUNET_NO, /* For header-only out notification */
4330 core_handlers); /* Register these handlers */
4331 if (core_handle == NULL)
4334 GNUNET_SCHEDULER_shutdown ();
4339 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4342 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4344 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4345 GNUNET_SCHEDULER_shutdown ();
4348 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4349 GNUNET_free (keyfile);
4350 if (my_private_key == NULL)
4352 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4353 _("Mesh service could not access hostkey. Exiting.\n"));
4354 GNUNET_SCHEDULER_shutdown ();
4357 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4358 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4359 &my_full_id.hashPubKey);
4360 myid = GNUNET_PEER_intern (&my_full_id);
4362 dht_handle = GNUNET_DHT_connect (c, 64);
4363 if (dht_handle == NULL)
4369 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4371 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4372 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4373 peers = GNUNET_CONTAINER_multihashmap_create (32);
4374 applications = GNUNET_CONTAINER_multihashmap_create (32);
4375 types = GNUNET_CONTAINER_multihashmap_create (32);
4377 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4378 nc = GNUNET_SERVER_notification_context_create (server_handle,
4380 GNUNET_SERVER_disconnect_notify (server_handle,
4381 &handle_local_client_disconnect,
4386 clients_tail = NULL;
4391 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4392 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4394 /* Create a peer_info for the local peer */
4395 peer = peer_info_get(&my_full_id);
4398 path_add_to_peer(peer, p);
4400 /* Scheduled the task to clean up when shutdown is called */
4401 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4408 * The main function for the mesh service.
4410 * @param argc number of arguments from the command line
4411 * @param argv command line arguments
4412 * @return 0 ok, 1 on error
4415 main (int argc, char *const *argv)
4419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4422 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");