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
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - relay corking down to core
48 #include "mesh_protocol.h"
49 #include "gnunet_dht_service.h"
50 #include "mesh_tunnel_tree.h"
52 /* TODO: move into configuration file */
53 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
54 GNUNET_TIME_UNIT_SECONDS,\
56 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
57 GNUNET_TIME_UNIT_SECONDS,\
60 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
61 GNUNET_TIME_UNIT_SECONDS,\
64 #define GET_RESTART_TIME GNUNET_TIME_relative_multiply(\
65 GNUNET_TIME_UNIT_SECONDS,\
68 #define UNACKNOWLEDGED_WAIT GNUNET_TIME_relative_multiply(\
69 GNUNET_TIME_UNIT_SECONDS,\
72 /******************************************************************************/
73 /************************ DATA STRUCTURES ****************************/
74 /******************************************************************************/
76 /** FWD declaration */
80 * Struct containing all info possibly needed to build a package when called
83 struct MeshDataDescriptor
85 /** ID of the tunnel this packet travels in */
86 struct MESH_TunnelID *origin;
91 /** Client that asked for the transmission, if any */
92 struct GNUNET_SERVER_Client *client;
94 /** Who was this message being sent to */
95 struct MeshPeerInfo *peer;
97 /** Ultimate destination of the packet */
98 GNUNET_PEER_Id destination;
100 /** Number of identical messages sent to different hops (multicast) */
101 unsigned int *copies;
103 /** Which handler was used to request the transmission */
104 unsigned int handler_n;
106 /** Size of the data */
109 /** Used to allow a client send more traffic to the service after a
110 * previous packet was tried to be sent to a neighbor and couldn't */
111 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
116 * Struct containing all information regarding a given peer
126 * Last time we heard from this peer
128 struct GNUNET_TIME_Absolute last_contact;
131 * Number of attempts to reconnect so far
133 int n_reconnect_attempts;
136 * Paths to reach the peer, ordered by ascending hop count
138 struct MeshPeerPath *path_head;
141 * Paths to reach the peer, ordered by ascending hop count
143 struct MeshPeerPath *path_tail;
146 * Handle to stop the DHT search for a path to this peer
148 struct GNUNET_DHT_GetHandle *dhtget;
151 * Closure given to the DHT GET
153 struct MeshPathInfo *dhtgetcls;
156 * Handles to stop queued transmissions for this peer
158 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
161 * Pointer to info stuctures used as cls for queued transmissions
163 void *infos[CORE_QUEUE_SIZE];
166 * Type of message being in each transmission
168 uint16_t types[CORE_QUEUE_SIZE];
171 * Array of tunnels this peer participates in
172 * (most probably a small amount, therefore not a hashmap)
173 * When the path to the peer changes, notify these tunnels to let them
174 * re-adjust their path trees.
176 struct MeshTunnel **tunnels;
179 * Number of tunnels this peers participates in
181 unsigned int ntunnels;
186 * Data scheduled to transmit (to local client or remote peer)
193 struct MeshQueue *next;
194 struct MeshQueue *prev;
197 * Target of the data (NULL if target is client)
199 struct MeshPeerInfo *peer;
202 * Client to send the data to (NULL if target is peer)
204 struct MeshClient *client;
207 * Size of the message to transmit
212 * How old is the data?
214 struct GNUNET_TIME_Absolute timestamp;
219 struct GNUNET_MessageHeader *data;
223 * Globally unique tunnel identification (owner + number)
224 * DO NOT USE OVER THE NETWORK
229 * Node that owns the tunnel
234 * Tunnel number to differentiate all the tunnels owned by the node oid
235 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
237 MESH_TunnelNumber tid;
241 struct MeshClient; /* FWD declaration */
244 * Struct containing all information regarding a tunnel
245 * For an intermediate node the improtant info used will be:
246 * - id Tunnel unique identification
247 * - paths[0] To know where to send it next
248 * - metainfo: ready, speeds, accounting
255 struct MESH_TunnelID id;
258 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
260 MESH_TunnelNumber local_tid;
263 * Last time the tunnel was used
265 struct GNUNET_TIME_Absolute timestamp;
268 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
269 * containing peers added by id or by type, not intermediate peers.
271 struct GNUNET_CONTAINER_MultiHashMap *peers;
274 * Number of peers that are connected and potentially ready to receive data
276 unsigned int peers_ready;
279 * Number of peers that have been added to the tunnel
281 unsigned int peers_total;
284 * Client owner of the tunnel, if any
286 struct MeshClient *client;
289 * Messages ready to transmit
291 struct MeshQueue *queue_head;
292 struct MeshQueue *queue_tail;
297 struct MeshTunnelTree *tree;
300 * Application type we are looking for in this tunnel
302 GNUNET_MESH_ApplicationType type;
305 * Used to search peers offering a service
307 struct GNUNET_DHT_GetHandle *dht_get_type;
310 * Task to keep the used paths alive
312 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
315 * Task to destroy the tunnel after timeout
317 * FIXME: merge the two? a tunnel will have either
318 * a path refresh OR a timeout, never both!
320 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
325 * Info needed to work with tunnel paths and peers
332 struct MeshTunnel *t;
335 * Neighbouring peer to whom we send the packet to
337 struct MeshPeerInfo *peer;
342 struct MeshPeerPath *path;
345 * Position in peer's transmit queue
352 * Struct containing information about a client of the service
359 struct MeshClient *next;
360 struct MeshClient *prev;
363 * Tunnels that belong to this client, indexed by local id
365 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
368 * Handle to communicate with the client
370 struct GNUNET_SERVER_Client *handle;
373 * Applications that this client has claimed to provide
375 struct GNUNET_CONTAINER_MultiHashMap *apps;
378 * Messages that this client has declared interest in
380 struct GNUNET_CONTAINER_MultiHashMap *types;
384 * ID of the client, for debug messages
393 /******************************************************************************/
394 /************************ DEBUG FUNCTIONS ****************************/
395 /******************************************************************************/
399 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
400 * @param cls string to print
401 * @param tc task context
404 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
408 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
416 /******************************************************************************/
417 /*********************** GLOBAL VARIABLES ****************************/
418 /******************************************************************************/
423 static struct MeshClient *clients;
424 static struct MeshClient *clients_tail;
427 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
429 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
432 * Tunnels incoming, indexed by MESH_TunnelNumber
433 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
435 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
438 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
440 static struct GNUNET_CONTAINER_MultiHashMap *peers;
443 * Handle to communicate with core
445 static struct GNUNET_CORE_Handle *core_handle;
450 static struct GNUNET_DHT_Handle *dht_handle;
455 static struct GNUNET_SERVER_Handle *server_handle;
458 * Notification context, to send messages to local clients
460 static struct GNUNET_SERVER_NotificationContext *nc;
463 * Local peer own ID (memory efficient handle)
465 static GNUNET_PEER_Id myid;
468 * Local peer own ID (full value)
470 static struct GNUNET_PeerIdentity my_full_id;
475 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
480 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
483 * Tunnel ID for the next created tunnel (global tunnel number)
485 static MESH_TunnelNumber next_tid;
488 * Tunnel ID for the next incoming tunnel (local tunnel number)
490 static MESH_TunnelNumber next_local_tid;
493 * All application types provided by this peer
495 static struct GNUNET_CONTAINER_MultiHashMap *applications;
498 * All message types clients of this peer are interested in
500 static struct GNUNET_CONTAINER_MultiHashMap *types;
503 * Task to periodically announce provided applications
505 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
508 * Task to periodically announce itself in the network
510 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
513 unsigned int next_client_id;
517 /******************************************************************************/
518 /************************ ITERATORS ****************************/
519 /******************************************************************************/
521 /* FIXME move iterators here */
524 /******************************************************************************/
525 /************************ PERIODIC FUNCTIONS ****************************/
526 /******************************************************************************/
529 * Announce iterator over for each application provided by the peer
532 * @param key current key code
533 * @param value value in the hash map
534 * @return GNUNET_YES if we should continue to
539 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
541 /* FIXME are hashes in multihash map equal on all aquitectures? */
542 GNUNET_DHT_put (dht_handle,
545 GNUNET_DHT_RO_RECORD_ROUTE |
546 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
547 GNUNET_BLOCK_TYPE_TEST,
548 sizeof (struct GNUNET_PeerIdentity),
549 (const char *) &my_full_id,
551 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
552 &mesh_debug, "DHT_put for app completed");
554 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
556 APP_ANNOUNCE_TIME, NULL, NULL);
563 * Periodically announce what applications are provided by local clients
566 * @param tc task context
569 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
571 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
573 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
577 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
579 announce_applications_task =
580 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
588 * Periodically announce self id in the DHT
591 * @param tc task context
594 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
596 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
598 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
602 * - Set data expiration in function of X
605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
606 GNUNET_h2s_full (&my_full_id.hashPubKey));
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);
697 client_allow_send(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
699 struct MeshDataDescriptor *info = cls;
701 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
703 info->timeout_task = GNUNET_SCHEDULER_NO_TASK;
704 GNUNET_SERVER_receive_done(info->client, GNUNET_OK);
709 * Search for a tunnel by global ID using full PeerIdentities
711 * @param oid owner of the tunnel
712 * @param tid global tunnel number
714 * @return tunnel handler, NULL if doesn't exist
716 static struct MeshTunnel *
717 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
721 * Notify a tunnel that a connection has broken that affects at least
724 * @param t Tunnel affected.
725 * @param p1 Peer that got disconnected from p2.
726 * @param p2 Peer that got disconnected from p1.
728 * @return Short ID of the peer disconnected (either p1 or p2).
729 * 0 if the tunnel remained unaffected.
731 static GNUNET_PEER_Id
732 tunnel_notify_connection_broken (struct MeshTunnel *t,
738 * Send the message to all clients that have subscribed to its type
740 * @param msg Pointer to the message itself
741 * @return number of clients this message was sent to
744 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
745 const struct GNUNET_MessageHeader *payload)
747 struct GNUNET_PeerIdentity *oid;
748 struct MeshClient *c;
749 struct MeshTunnel *t;
750 MESH_TunnelNumber *tid;
753 char cbuf[htons(msg->size)];
755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Sending to clients...\n");
756 type = ntohs (payload->type);
757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message of type %u\n", type);
759 memcpy (cbuf, msg, sizeof(cbuf));
760 switch (htons(msg->type))
762 struct GNUNET_MESH_Unicast *uc;
763 struct GNUNET_MESH_Multicast *mc;
764 struct GNUNET_MESH_ToOrigin *to;
766 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
767 uc = (struct GNUNET_MESH_Unicast *) cbuf;
771 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
772 mc = (struct GNUNET_MESH_Multicast *) cbuf;
776 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
777 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
785 t = tunnel_get (oid, ntohl(*tid));
791 *tid = htonl (t->local_tid);
792 for (count = 0, c = clients; c != NULL; c = c->next)
794 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client %u\n", c->id);
795 if (client_is_subscribed (type, c))
798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending\n");
799 GNUNET_SERVER_notification_context_unicast (
802 (struct GNUNET_MessageHeader *) cbuf,
811 * Notify the client that owns the tunnel that a peer has connected to it
812 * (the requested path to it has been confirmed).
814 * @param t Tunnel whose owner to notify
815 * @param id Short id of the peer that has connected
818 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
820 struct GNUNET_MESH_PeerControl pc;
822 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
823 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
824 pc.tunnel_id = htonl (t->local_tid);
825 GNUNET_PEER_resolve (id, &pc.peer);
826 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
827 &pc.header, GNUNET_NO);
832 * Notify all clients (not depending on registration status) that the incoming
833 * tunnel is no longer valid.
835 * @param t Tunnel that was destroyed.
838 send_clients_tunnel_destroy (struct MeshTunnel *t)
840 struct GNUNET_MESH_TunnelMessage msg;
842 msg.header.size = htons (sizeof (msg));
843 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
844 msg.tunnel_id = htonl (t->local_tid);
845 GNUNET_SERVER_notification_context_broadcast(nc, &msg.header, GNUNET_NO);
850 * Function called to notify a client about the socket
851 * being ready to queue more data. "buf" will be
852 * NULL and "size" zero if the socket was closed for
853 * writing in the meantime.
856 * @param size number of bytes available in buf
857 * @param buf where the callee should write the message
858 * @return number of bytes written to buf
861 send_core_create_path (void *cls, size_t size, void *buf);
865 * Function called to notify a client about the socket
866 * being ready to queue more data. "buf" will be
867 * NULL and "size" zero if the socket was closed for
868 * writing in the meantime.
870 * @param cls closure (data itself)
871 * @param size number of bytes available in buf
872 * @param buf where the callee should write the message
874 * @return number of bytes written to buf
877 send_core_data_multicast (void *cls, size_t size, void *buf);
881 * Cancel a core transmission that was already requested and free all resources
882 * associated to the request.
884 * @param peer PeeInfo of the peer whose transmission is cancelled.
885 * @param i Position of the transmission to be cancelled.
888 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
890 if (NULL != peer->core_transmit[i])
892 struct MeshDataDescriptor *dd;
893 struct MeshPathInfo *path_info;
897 struct GNUNET_PeerIdentity id;
899 GNUNET_PEER_resolve (peer->id, &id);
900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
901 "MESH: Cancelling data transmission at %s [%u]\n",
904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
905 "MESH: message type %u\n",
909 /* TODO: notify that tranmission has failed */
910 switch (peer->types[i])
912 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
913 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
914 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
915 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
917 if (0 == --(*dd->copies))
919 GNUNET_free (dd->copies);
920 GNUNET_free (dd->data);
923 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
924 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
925 path_info = peer->infos[i];
926 path_destroy(path_info->path);
930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
932 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
933 peer->core_transmit[i] = NULL;
934 GNUNET_free (peer->infos[i]);
940 * Get a unused CORE slot to transmit a message to a peer. If all the slots
941 * are used, cancel one and return it's position.
943 * @param peer PeerInfo of the neighbor we want to transmit to.
945 * @return The index of an available slot to transmit to the neighbor.
948 peer_info_transmit_slot (struct MeshPeerInfo *peer)
952 for (i = 0; peer->core_transmit[i]; i++)
954 if (i == (CORE_QUEUE_SIZE - 1))
956 /* All positions are taken! Overwriting! */
958 peer_info_cancel_transmission(peer, 0);
967 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
968 * and insert it in the appropiate structures if the peer is not known yet.
970 * @param peer Full identity of the peer.
972 * @return Existing or newly created peer info.
974 static struct MeshPeerInfo *
975 peer_info_get (const struct GNUNET_PeerIdentity *peer)
977 struct MeshPeerInfo *peer_info;
979 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
980 if (NULL == peer_info)
983 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
984 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
985 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
986 peer_info->id = GNUNET_PEER_intern (peer);
994 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
995 * and insert it in the appropiate structures if the peer is not known yet.
997 * @param peer Short identity of the peer.
999 * @return Existing or newly created peer info.
1001 static struct MeshPeerInfo *
1002 peer_info_get_short (const GNUNET_PEER_Id peer)
1004 struct GNUNET_PeerIdentity id;
1006 GNUNET_PEER_resolve(peer, &id);
1007 return peer_info_get(&id);
1012 * Iterator to remove the tunnel from the list of tunnels a peer participates
1015 * @param cls Closure (tunnel info)
1016 * @param key GNUNET_PeerIdentity of the peer (unused)
1017 * @param value PeerInfo of the peer
1019 * @return always GNUNET_YES, to keep iterating
1022 peer_info_delete_tunnel (void* cls, const GNUNET_HashCode* key, void* value)
1024 struct MeshTunnel *t = cls;
1025 struct MeshPeerInfo *peer = value;
1028 for (i = 0; i < peer->ntunnels; i++)
1030 if (0 == memcmp(&peer->tunnels[i]->id,
1032 sizeof(struct MESH_TunnelID)))
1035 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1036 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1045 * Core callback to write a
1047 * @param cls Closure (MeshDataDescriptor with data in "data" member).
1048 * @param size Number of bytes available in buf.
1049 * @param buf Where the to write the message.
1051 * @return number of bytes written to buf
1054 send_core_data_raw (void *cls, size_t size, void *buf)
1056 struct MeshDataDescriptor *info = cls;
1057 struct GNUNET_MessageHeader *msg;
1060 GNUNET_assert (NULL != info);
1061 GNUNET_assert (NULL != info->data);
1062 msg = (struct GNUNET_MessageHeader *) info->data;
1063 total_size = ntohs (msg->size);
1065 if (total_size > size)
1067 struct GNUNET_PeerIdentity id;
1069 GNUNET_PEER_resolve (info->peer->id, &id);
1070 info->peer->core_transmit[info->handler_n] =
1071 GNUNET_CORE_notify_transmit_ready(core_handle,
1074 GNUNET_TIME_UNIT_FOREVER_REL,
1077 &send_core_data_raw,
1081 info->peer->core_transmit[info->handler_n] = NULL;
1082 memcpy (buf, msg, total_size);
1083 GNUNET_free (info->data);
1090 * Sends an already built message to a peer, properly registrating
1091 * all used resources.
1093 * @param message Message to send.
1094 * @param peer Short ID of the neighbor whom to send the message.
1097 send_message (const struct GNUNET_MessageHeader *message,
1098 const struct GNUNET_PeerIdentity *peer)
1100 struct MeshDataDescriptor *info;
1101 struct MeshPeerInfo *neighbor;
1105 size = ntohs (message->size);
1106 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1107 info->data = GNUNET_malloc (size);
1108 memcpy (info->data, message, size);
1109 neighbor = peer_info_get (peer);
1110 i = peer_info_transmit_slot (neighbor);
1111 info->handler_n = i;
1112 info->peer = neighbor;
1113 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1114 neighbor->infos[i] = info;
1115 neighbor->core_transmit[i] =
1116 GNUNET_CORE_notify_transmit_ready(core_handle,
1119 GNUNET_TIME_UNIT_FOREVER_REL,
1122 &send_core_data_raw,
1129 * Sends a CREATE PATH message for a path to a peer, properly registrating
1130 * all used resources.
1132 * @param peer PeerInfo of the final peer for whom this path is being created.
1133 * @param p Path itself.
1134 * @param t Tunnel for which the path is created.
1137 send_create_path (struct MeshPeerInfo *peer,
1138 struct MeshPeerPath *p,
1139 struct MeshTunnel *t)
1141 struct GNUNET_PeerIdentity id;
1142 struct MeshPathInfo *path_info;
1143 struct MeshPeerInfo *neighbor;
1148 p = tree_get_path_to_peer(t->tree, peer->id);
1155 for (i = 0; i < p->length; i++)
1157 if (p->peers[i] == myid)
1160 if (i >= p->length - 1)
1166 GNUNET_PEER_resolve(p->peers[i + 1], &id);
1168 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1169 path_info->path = p;
1171 neighbor = peer_info_get(&id);
1172 path_info->peer = neighbor;
1173 path_info->pos = peer_info_transmit_slot(neighbor);
1174 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1175 neighbor->infos[path_info->pos] = path_info;
1176 neighbor->core_transmit[path_info->pos] =
1177 GNUNET_CORE_notify_transmit_ready (
1178 core_handle, /* handle */
1181 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1183 sizeof (struct GNUNET_MESH_ManipulatePath)
1184 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1185 &send_core_create_path, /* callback */
1186 path_info); /* cls */
1191 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1193 * @param t Tunnel whose path to destroy.
1194 * @param destination Short ID of the peer to whom the path to destroy.
1197 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1199 struct GNUNET_MESH_ManipulatePath *msg;
1200 struct GNUNET_PeerIdentity *pi;
1201 struct MeshPeerPath *p;
1205 p = tree_get_path_to_peer(t->tree, destination);
1211 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1212 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1213 msg = GNUNET_malloc (size);
1214 msg->header.size = htons (size);
1215 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1216 msg->tid = htonl (t->id.tid);
1217 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1218 for (i = 0; i < p->length; i++)
1220 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1222 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1228 * Try to establish a new connection to this peer.
1229 * Use the best path for the given tunnel.
1230 * If the peer doesn't have any path to it yet, try to get one.
1231 * If the peer already has some path, send a CREATE PATH towards it.
1233 * @param peer PeerInfo of the peer.
1234 * @param t Tunnel for which to create the path, if possible.
1237 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1239 struct MeshPeerPath *p;
1240 struct MeshPathInfo *path_info;
1242 if (NULL != peer->path_head)
1244 p = tree_get_path_to_peer(t->tree, peer->id);
1247 send_create_path(peer, p, t);
1252 send_client_peer_connected(t, myid);
1255 else if (NULL == peer->dhtget)
1257 struct GNUNET_PeerIdentity id;
1259 GNUNET_PEER_resolve(peer->id, &id);
1260 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1261 path_info->peer = peer;
1263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1264 "MESH: Starting DHT GET for peer %s\n",
1266 peer->dhtgetcls = path_info;
1268 GNUNET_DHT_get_start(dht_handle, /* handle */
1269 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1270 GNUNET_BLOCK_TYPE_TEST, /* type */
1271 &id.hashPubKey, /* key to search */
1272 4, /* replication level */
1273 GNUNET_DHT_RO_RECORD_ROUTE |
1274 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1276 0, /* xquery bits */
1277 &dht_get_id_handler,
1280 /* Otherwise, there is no path but the DHT get is already started. */
1285 * Destroy the peer_info and free any allocated resources linked to it
1287 * @param pi The peer_info to destroy.
1289 * @return GNUNET_OK on success
1292 peer_info_destroy (struct MeshPeerInfo *pi)
1294 struct GNUNET_PeerIdentity id;
1295 GNUNET_HashCode hash;
1296 struct MeshPeerPath *p;
1297 struct MeshPeerPath *nextp;
1300 GNUNET_PEER_resolve (pi->id, &id);
1301 GNUNET_PEER_change_rc (pi->id, -1);
1302 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
1304 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi))
1307 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1308 "MESH: removing peer %s, not in hashmap\n",
1311 if (NULL != pi->dhtget)
1313 GNUNET_DHT_get_stop(pi->dhtget);
1314 GNUNET_free (pi->dhtgetcls);
1316 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1318 peer_info_cancel_transmission(pi, i);
1324 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1334 * Remove all paths that rely on a direct connection between p1 and p2
1335 * from the peer itself and notify all tunnels about it.
1337 * @param peer PeerInfo of affected peer.
1338 * @param p1 GNUNET_PEER_Id of one peer.
1339 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1342 * TODO: optimize (see below)
1345 path_remove_from_peer (struct MeshPeerInfo *peer,
1349 struct MeshPeerPath *p;
1350 struct MeshPeerPath *aux;
1351 struct MeshPeerInfo *peer_d;
1353 unsigned int destroyed;
1359 p = peer->path_head;
1363 for (i = 0; i < (p->length - 1); i++)
1365 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1366 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1368 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1379 for (i = 0; i < peer->ntunnels; i++)
1381 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1383 * Problem: one or more peers have been deleted from the tunnel tree.
1384 * We don't know who they are to try to add them again.
1385 * We need to try to find a new path for each of the disconnected peers.
1386 * Some of them might already have a path to reach them that does not
1387 * involve p1 and p2. Adding all anew might render in a better tree than
1388 * the trivial immediate fix.
1390 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1391 * its children will be reachable trough him.
1393 peer_d = peer_info_get_short(d);
1396 for (p = peer_d->path_head; NULL != p; p = p->next)
1398 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1406 /* No callback, as peer will be already disconnected */
1407 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1411 peer_info_connect (peer_d, peer->tunnels[i]);
1418 * Add the path to the peer and update the path used to reach it in case this
1421 * @param peer_info Destination peer to add the path to.
1422 * @param path New path to add. Last peer must be the peer in arg 1.
1423 * Path will be either used of freed if already known.
1425 * TODO: trim the part from origin to us? Add it as path to origin?
1428 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1430 struct MeshPeerPath *aux;
1434 if (NULL == peer_info || NULL == path)
1440 l = path_get_length (path);
1447 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1449 l2 = path_get_length (aux);
1452 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1453 peer_info->path_tail, aux, path);
1457 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1464 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1471 * Add the path to the origin peer and update the path used to reach it in case
1472 * this is the shortest.
1473 * The path is given in peer_info -> destination, therefore we turn the path
1474 * upside down first.
1476 * @param peer_info Peer to add the path to, being the origin of the path.
1477 * @param path New path to add after being inversed.
1480 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1483 path_add_to_peer (peer_info, path);
1488 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1489 * to obtain a local peer -> destination path and interning the peer ids.
1491 * @return Newly allocated and created path
1493 static struct MeshPeerPath *
1494 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1495 unsigned int get_path_length,
1496 const struct GNUNET_PeerIdentity *put_path,
1497 unsigned int put_path_length)
1499 struct MeshPeerPath *p;
1505 GNUNET_PEER_change_rc(myid, 1);
1506 i = get_path_length;
1507 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1508 for (i--; i >= 0; i--)
1510 id = GNUNET_PEER_intern (&get_path[i]);
1511 if (p->length > 0 && id == p->peers[p->length - 1])
1513 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1514 GNUNET_PEER_change_rc(id, -1);
1518 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1519 "MESH: Adding from GET: %s.\n",
1520 GNUNET_i2s(&get_path[i]));
1522 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1523 p->peers[p->length - 1] = id;
1526 i = put_path_length;
1527 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1528 for (i--; i >= 0; i--)
1530 id = GNUNET_PEER_intern (&put_path[i]);
1533 /* PUT path went through us, so discard the path up until now and start
1534 * from here to get a much shorter (and loop-free) path.
1539 if (p->length > 0 && id == p->peers[p->length - 1])
1541 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1542 GNUNET_PEER_change_rc(id, -1);
1546 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1547 "MESH: Adding from PUT: %s.\n",
1548 GNUNET_i2s(&put_path[i]));
1550 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1551 p->peers[p->length - 1] = id;
1555 if (get_path_length > 0)
1556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1557 "MESH: (first of GET: %s)\n",
1558 GNUNET_h2s_full(&get_path[0].hashPubKey));
1559 if (put_path_length > 0)
1560 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1561 "MESH: (first of PUT: %s)\n",
1562 GNUNET_h2s_full(&put_path[0].hashPubKey));
1563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1564 "MESH: In total: %d hops\n",
1566 for (i = 0; i < p->length; i++)
1568 struct GNUNET_PeerIdentity peer_id;
1570 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1574 GNUNET_h2s_full(&peer_id.hashPubKey));
1582 * Send keepalive packets for a peer
1584 * @param cls Closure (tunnel for which to send the keepalive).
1585 * @param tc Notification context.
1587 * TODO: implement explicit multicast keepalive?
1590 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1594 * Search for a tunnel among the tunnels for a client
1596 * @param c the client whose tunnels to search in
1597 * @param tid the local id of the tunnel
1599 * @return tunnel handler, NULL if doesn't exist
1601 static struct MeshTunnel *
1602 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1604 GNUNET_HashCode hash;
1606 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1607 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1609 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1611 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1616 * Search for a tunnel by global ID using PEER_ID
1618 * @param pi owner of the tunnel
1619 * @param tid global tunnel number
1621 * @return tunnel handler, NULL if doesn't exist
1623 static struct MeshTunnel *
1624 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1626 struct MESH_TunnelID id;
1627 GNUNET_HashCode hash;
1632 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1633 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1638 * Search for a tunnel by global ID using full PeerIdentities
1640 * @param oid owner of the tunnel
1641 * @param tid global tunnel number
1643 * @return tunnel handler, NULL if doesn't exist
1645 static struct MeshTunnel *
1646 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1648 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1653 * Callback used to notify a client owner of a tunnel that a peer has
1654 * disconnected, most likely because of a path change.
1656 * @param n Node in the tree representing the disconnected peer
1658 * FIXME: pass tunnel via cls, make param just a peer identity
1661 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1663 struct MeshPeerInfo *peer;
1665 if (NULL != n->t->client && NULL != nc)
1667 struct GNUNET_MESH_PeerControl msg;
1668 msg.header.size = htons (sizeof (msg));
1669 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1670 msg.tunnel_id = htonl (n->t->local_tid);
1671 GNUNET_PEER_resolve (n->peer, &msg.peer);
1672 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1673 &msg.header, GNUNET_NO);
1675 peer = peer_info_get_short(n->peer);
1676 peer_info_connect(peer, n->t);
1681 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1682 * needed rescources.
1683 * If peer already exists, reevaluate shortest path and change if different.
1685 * @param t Tunnel we want to add a new peer to
1686 * @param peer PeerInfo of the peer being added
1690 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1692 struct GNUNET_PeerIdentity id;
1693 struct MeshPeerPath *best_p;
1694 struct MeshPeerPath *p;
1695 unsigned int best_cost;
1698 GNUNET_PEER_resolve(peer->id, &id);
1700 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1703 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1704 GNUNET_CONTAINER_multihashmap_put(
1708 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1711 if (NULL != (p = peer->path_head))
1714 best_cost = path_get_cost(t->tree, p);
1717 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1724 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1725 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1726 t->path_refresh_task =
1727 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1731 /* Start a DHT get if necessary */
1732 peer_info_connect(peer, t);
1737 * Add a path to a tunnel which we don't own, just to remember the next hop.
1738 * If destination node was already in the tunnel, the first hop information
1739 * will be replaced with the new path.
1741 * @param t Tunnel we want to add a new peer to
1742 * @param p Path to add
1743 * @param own_pos Position of local node in path.
1747 tunnel_add_path (struct MeshTunnel *t,
1748 struct MeshPeerPath *p,
1749 unsigned int own_pos)
1751 struct GNUNET_PeerIdentity id;
1753 GNUNET_assert (0 != own_pos);
1754 tree_add_path(t->tree, p, NULL);
1755 if (NULL == t->tree->me)
1756 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1757 if (own_pos < p->length - 1)
1759 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1760 tree_update_first_hops(t->tree, t->tree->me, &id);
1766 * Notifies a tunnel that a connection has broken that affects at least
1767 * some of its peers. Sends a notification towards the root of the tree.
1768 * In case the peer is the owner of the tree, notifies the client that owns
1769 * the tunnel and tries to reconnect.
1771 * @param t Tunnel affected.
1772 * @param p1 Peer that got disconnected from p2.
1773 * @param p2 Peer that got disconnected from p1.
1775 * @return Short ID of the peer disconnected (either p1 or p2).
1776 * 0 if the tunnel remained unaffected.
1778 static GNUNET_PEER_Id
1779 tunnel_notify_connection_broken (struct MeshTunnel *t,
1785 pid = tree_notify_connection_broken (t->tree,
1788 ¬ify_peer_disconnected);
1789 if (myid != p1 && myid != p2)
1795 if (NULL != t->tree->me->parent)
1797 /* We are the peer still connected, notify owner of the disconnection. */
1798 struct GNUNET_MESH_PathBroken msg;
1799 struct GNUNET_PeerIdentity neighbor;
1801 msg.header.size = htons (sizeof (msg));
1802 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1803 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1804 msg.tid = htonl (t->id.tid);
1805 msg.peer1 = my_full_id;
1806 GNUNET_PEER_resolve (pid, &msg.peer2);
1807 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1808 send_message (&msg.header, &neighbor);
1816 * Send a message in a tunnel in multicast, sending a copy to each child node
1817 * down the local one in the tunnel tree.
1819 * @param t Tunnel in which to send the data.
1820 * @param msg Message to be sent
1822 * @return Number of copies sent.
1825 tunnel_send_multicast (struct MeshTunnel *t,
1826 const struct GNUNET_MessageHeader *msg)
1828 struct GNUNET_PeerIdentity neighbor;
1829 struct MeshDataDescriptor *info;
1830 struct MeshTunnelTreeNode *n;
1831 unsigned int *copies;
1836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1837 "MESH: sending a multicast packet...\n");
1838 size = ntohs (msg->size);
1839 GNUNET_assert (NULL != t->tree->me);
1840 n = t->tree->me->children_head;
1843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1844 "MESH: no children in the tree, no one to send.\n");
1847 copies = GNUNET_malloc (sizeof (unsigned int));
1848 for (*copies = 0; NULL != n; n = n->next)
1850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1851 n = t->tree->me->children_head;
1852 data = GNUNET_malloc (size);
1853 memcpy (data, msg, size);
1856 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1859 info->copies = copies;
1860 if (NULL != t->client)
1862 info->client = t->client->handle;
1863 info->timeout_task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1867 info->destination = n->peer;
1868 GNUNET_PEER_resolve (n->peer, &neighbor);
1869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1870 "MESH: sending to %s...\n",
1871 GNUNET_i2s (&neighbor));
1872 info->peer = peer_info_get(&neighbor);
1873 GNUNET_assert (NULL != info->peer);
1874 i = peer_info_transmit_slot(info->peer);
1875 info->handler_n = i;
1876 info->peer->infos[i] = info;
1877 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1878 info->peer->core_transmit[i] =
1879 GNUNET_CORE_notify_transmit_ready (core_handle,
1882 GNUNET_TIME_UNIT_FOREVER_REL,
1885 &send_core_data_multicast, info);
1893 * Send a message to all peers in this tunnel that the tunnel is no longer
1896 * @param t The tunnel whose peers to notify.
1899 tunnel_send_destroy (struct MeshTunnel *t)
1901 struct GNUNET_MESH_TunnelDestroy msg;
1903 msg.header.size = htons (sizeof (msg));
1904 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
1905 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1906 msg.tid = htonl (t->id.tid);
1907 tunnel_send_multicast (t, &msg.header);
1913 * Destroy the tunnel and free any allocated resources linked to it
1915 * @param t the tunnel to destroy
1917 * @return GNUNET_OK on success
1920 tunnel_destroy (struct MeshTunnel *t)
1922 struct MeshClient *c;
1923 struct MeshQueue *q;
1924 struct MeshQueue *qn;
1925 GNUNET_HashCode hash;
1934 struct GNUNET_PeerIdentity id;
1936 GNUNET_PEER_resolve(t->id.oid, &id);
1937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1938 "MESH: destroying tunnel %s [%x]\n",
1942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1946 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1947 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1952 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1954 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1958 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1960 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1961 GNUNET_break (GNUNET_YES ==
1962 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
1965 if (NULL != t->peers)
1967 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
1968 &peer_info_delete_tunnel, t);
1969 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1974 if (NULL != q->data)
1975 GNUNET_free (q->data);
1979 /* TODO cancel core transmit ready in case it was active */
1981 tree_destroy(t->tree);
1982 if (NULL != t->dht_get_type)
1983 GNUNET_DHT_get_stop(t->dht_get_type);
1984 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
1985 GNUNET_SCHEDULER_cancel(t->timeout_task);
1986 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
1987 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
1994 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1995 * that are no longer needed, as well as nodes of no longer reachable peers.
1996 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1998 * @param t Tunnel from which to remove the path.
1999 * @param p Peer which should be removed.
2002 tunnel_delete_peer (struct MeshTunnel *t,
2003 GNUNET_PEER_Id peer)
2005 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2006 if (NULL == t->tree->root)
2012 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2013 * client when the client disconnects.
2015 * @param cls closure (client that is disconnecting)
2016 * @param key the hash of the local tunnel id (used to access the hashmap)
2017 * @param value the value stored at the key (tunnel to destroy)
2019 * @return GNUNET_OK on success
2022 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2024 struct MeshTunnel *t = value;
2027 if (NULL != t->dht_get_type)
2029 GNUNET_DHT_get_stop (t->dht_get_type);
2031 r = tunnel_destroy (t);
2037 * Timeout function, destroys tunnel if called
2039 * @param cls Closure (tunnel to destroy).
2040 * @param tc TaskContext
2043 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2045 struct MeshTunnel *t = cls;
2047 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2049 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2054 * Resets the tunnel timeout. Starts it if no timeout was running.
2056 * @param t Tunnel whose timeout to reset.
2059 tunnel_reset_timeout (struct MeshTunnel *t)
2061 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2062 GNUNET_SCHEDULER_cancel (t->timeout_task);
2063 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2064 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2070 /******************************************************************************/
2071 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2072 /******************************************************************************/
2075 * Function called to notify a client about the socket
2076 * being ready to queue more data. "buf" will be
2077 * NULL and "size" zero if the socket was closed for
2078 * writing in the meantime.
2080 * @param cls closure
2081 * @param size number of bytes available in buf
2082 * @param buf where the callee should write the message
2083 * @return number of bytes written to buf
2086 send_core_create_path (void *cls, size_t size, void *buf)
2088 struct MeshPathInfo *info = cls;
2089 struct GNUNET_MESH_ManipulatePath *msg;
2090 struct GNUNET_PeerIdentity *peer_ptr;
2091 struct MeshPeerInfo *peer = info->peer;
2092 struct MeshTunnel *t = info->t;
2093 struct MeshPeerPath *p = info->path;
2097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2098 "MESH: CREATE PATH sending...\n");
2100 sizeof (struct GNUNET_MESH_ManipulatePath) +
2101 p->length * sizeof (struct GNUNET_PeerIdentity);
2103 if (size < size_needed || NULL == buf)
2105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2109 info->peer->core_transmit[info->pos] =
2110 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2111 GNUNET_TIME_UNIT_FOREVER_REL,
2112 path_get_first_hop (t->tree, peer->id),
2114 &send_core_create_path,
2118 info->peer->core_transmit[info->pos] = NULL;
2121 struct GNUNET_PeerIdentity id;
2123 GNUNET_PEER_resolve (peer->id, &id);
2124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2125 "MESH: setting core_transmit %s [%u] to NULL\n",
2130 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2131 msg->header.size = htons (size_needed);
2132 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2133 msg->tid = ntohl (t->id.tid);
2135 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2136 for (i = 0; i < p->length; i++)
2138 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2145 "MESH: CREATE PATH (%u bytes long) sent!\n",
2152 * Function called to notify a client about the socket
2153 * being ready to queue more data. "buf" will be
2154 * NULL and "size" zero if the socket was closed for
2155 * writing in the meantime.
2157 * @param cls closure (data itself)
2158 * @param size number of bytes available in buf
2159 * @param buf where the callee should write the message
2161 * @return number of bytes written to buf
2164 send_core_data_multicast (void *cls, size_t size, void *buf)
2166 struct MeshDataDescriptor *info = cls;
2169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2170 GNUNET_assert (NULL != info);
2171 GNUNET_assert (NULL != info->peer);
2172 total_size = info->size;
2173 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2175 if (total_size > size)
2178 struct GNUNET_PeerIdentity id;
2180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2181 "MESH: Multicast: retransmitting... (%u/%u)\n",
2183 GNUNET_PEER_resolve(info->peer->id, &id);
2184 info->peer->core_transmit[info->handler_n] =
2185 GNUNET_CORE_notify_transmit_ready (core_handle,
2188 GNUNET_TIME_UNIT_FOREVER_REL,
2191 &send_core_data_multicast,
2195 info->peer->core_transmit[info->handler_n] = NULL;
2196 info->peer->infos[info->handler_n] = NULL;
2197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2198 memcpy (buf, info->data, total_size);
2201 struct GNUNET_MESH_Multicast *mc;
2202 struct GNUNET_MessageHeader *mh;
2205 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2207 mc = (struct GNUNET_MESH_Multicast *) mh;
2208 mh = (struct GNUNET_MessageHeader *) &mc[1];
2209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2210 "MESH: multicast, payload type %u\n",
2212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2213 "MESH: multicast, payload size %u\n",
2218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2224 if (0 == --(*info->copies))
2226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
2227 if (NULL != info->client)
2229 if (GNUNET_SCHEDULER_NO_TASK != info->timeout_task)
2231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2232 "MESH: cancelling client timeout (%u)...\n",
2233 info->timeout_task);
2234 GNUNET_SCHEDULER_cancel(info->timeout_task);
2235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
2236 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
2239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing memory...\n");
2240 GNUNET_free (info->data);
2241 GNUNET_free (info->copies);
2243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2251 * Function called to notify a client about the socket
2252 * being ready to queue more data. "buf" will be
2253 * NULL and "size" zero if the socket was closed for
2254 * writing in the meantime.
2256 * @param cls closure (MeshDataDescriptor)
2257 * @param size number of bytes available in buf
2258 * @param buf where the callee should write the message
2259 * @return number of bytes written to buf
2262 send_core_path_ack (void *cls, size_t size, void *buf)
2264 struct MeshDataDescriptor *info = cls;
2265 struct GNUNET_MESH_PathACK *msg = buf;
2267 GNUNET_assert (NULL != info);
2270 info->peer->core_transmit[info->handler_n] = NULL;
2272 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2277 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2278 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2279 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2280 msg->tid = htonl (info->origin->tid);
2281 msg->peer_id = my_full_id;
2283 /* TODO add signature */
2285 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2286 return sizeof (struct GNUNET_MESH_PathACK);
2290 /******************************************************************************/
2291 /******************** MESH NETWORK HANDLERS **************************/
2292 /******************************************************************************/
2296 * Core handler for path creation
2298 * @param cls closure
2299 * @param message message
2300 * @param peer peer identity this notification is about
2301 * @param atsi performance data
2302 * @param atsi_count number of records in 'atsi'
2304 * @return GNUNET_OK to keep the connection open,
2305 * GNUNET_SYSERR to close it (signal serious error)
2308 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2309 const struct GNUNET_MessageHeader *message,
2310 const struct GNUNET_ATS_Information *atsi,
2311 unsigned int atsi_count)
2313 unsigned int own_pos;
2316 MESH_TunnelNumber tid;
2317 struct GNUNET_MESH_ManipulatePath *msg;
2318 struct GNUNET_PeerIdentity *pi;
2319 GNUNET_HashCode hash;
2320 struct MeshPeerPath *path;
2321 struct MeshPeerInfo *dest_peer_info;
2322 struct MeshPeerInfo *orig_peer_info;
2323 struct MeshTunnel *t;
2325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2326 "MESH: Received a path create msg [%s]\n",
2327 GNUNET_i2s(&my_full_id));
2328 size = ntohs (message->size);
2329 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2331 GNUNET_break_op (0);
2335 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2336 if (size % sizeof (struct GNUNET_PeerIdentity))
2338 GNUNET_break_op (0);
2341 size /= sizeof (struct GNUNET_PeerIdentity);
2344 GNUNET_break_op (0);
2347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2348 "MESH: path has %u hops.\n",
2350 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2352 tid = ntohl (msg->tid);
2353 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2354 t = tunnel_get (pi, tid);
2355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2356 "MESH: path is for tunnel %s [%X].\n",
2361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2362 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2363 t->id.oid = GNUNET_PEER_intern (pi);
2365 t->local_tid = next_local_tid++;
2366 /* FIXME test if taken */
2367 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2368 t->tree = tree_new(t, t->id.oid);
2370 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2372 GNUNET_CONTAINER_multihashmap_put (
2376 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2382 tunnel_reset_timeout (t);
2383 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2385 GNUNET_CONTAINER_multihashmap_put (
2389 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2397 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2398 if (NULL == dest_peer_info)
2400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2401 "MESH: Creating PeerInfo for destination.\n");
2402 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2403 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2404 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2406 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2408 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2409 if (NULL == orig_peer_info)
2411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2412 "MESH: Creating PeerInfo for origin.\n");
2413 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2414 orig_peer_info->id = GNUNET_PEER_intern (pi);
2415 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2416 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2419 path = path_new (size);
2421 for (i = 0; i < size; i++)
2423 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2424 "MESH: ... adding %s\n",
2425 GNUNET_i2s(&pi[i]));
2426 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2427 if (path->peers[i] == myid)
2430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2431 "MESH: Own position: %u\n", own_pos);
2434 /* cannot be self, must be 'not found' */
2435 /* create path: self not found in path through self */
2436 GNUNET_break_op (0);
2437 path_destroy (path);
2438 /* FIXME error. destroy tunnel? leave for timeout? */
2441 tunnel_add_path (t, path, own_pos);
2442 if (own_pos == size - 1)
2444 /* It is for us! Send ack. */
2445 struct GNUNET_MESH_TunnelNotification cmsg;
2446 struct MeshDataDescriptor *info;
2449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2450 "MESH: It's for us!\n");
2451 path_add_to_origin (orig_peer_info, path);
2452 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2453 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2455 &my_full_id.hashPubKey,
2456 peer_info_get(&my_full_id),
2457 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2458 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2459 info->origin = &t->id;
2460 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2461 GNUNET_assert (NULL != info->peer);
2462 j = peer_info_transmit_slot(info->peer);
2463 info->handler_n = j;
2464 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2465 info->peer->infos[j] = info;
2466 info->peer->core_transmit[j] =
2467 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2468 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2469 sizeof (struct GNUNET_MESH_PathACK),
2470 &send_core_path_ack, info);
2471 cmsg.header.size = htons(sizeof(cmsg));
2472 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2473 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2474 cmsg.tunnel_id = htonl(t->local_tid);
2475 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2479 struct MeshPeerPath *path2;
2481 /* It's for somebody else! Retransmit. */
2482 path2 = path_duplicate(path);
2483 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2484 "MESH: Retransmitting.\n");
2485 path_add_to_peer(dest_peer_info, path);
2486 path = path_duplicate(path2);
2487 path_add_to_origin(orig_peer_info, path2);
2488 send_create_path(dest_peer_info, path, t);
2495 * Core handler for path destruction
2497 * @param cls closure
2498 * @param message message
2499 * @param peer peer identity this notification is about
2500 * @param atsi performance data
2501 * @param atsi_count number of records in 'atsi'
2503 * @return GNUNET_OK to keep the connection open,
2504 * GNUNET_SYSERR to close it (signal serious error)
2507 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2508 const struct GNUNET_MessageHeader *message,
2509 const struct GNUNET_ATS_Information *atsi,
2510 unsigned int atsi_count)
2512 struct GNUNET_MESH_ManipulatePath *msg;
2513 struct GNUNET_PeerIdentity *pi;
2514 struct MeshPeerPath *path;
2515 struct MeshTunnel *t;
2516 unsigned int own_pos;
2520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2521 "MESH: Received a PATH DESTROY msg from %s\n",
2523 size = ntohs (message->size);
2524 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2526 GNUNET_break_op (0);
2530 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2531 if (size % sizeof (struct GNUNET_PeerIdentity))
2533 GNUNET_break_op (0);
2536 size /= sizeof (struct GNUNET_PeerIdentity);
2539 GNUNET_break_op (0);
2542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2543 "MESH: path has %u hops.\n",
2546 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2547 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2549 "MESH: path is for tunnel %s [%X].\n",
2552 t = tunnel_get (pi, ntohl (msg->tid));
2555 /* TODO notify back: we don't know this tunnel */
2556 GNUNET_break_op (0);
2559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2560 path = path_new (size);
2562 for (i = 0; i < size; i++)
2564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2565 "MESH: ... adding %s\n",
2566 GNUNET_i2s(&pi[i]));
2567 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2568 if (path->peers[i] == myid)
2571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2572 "MESH: Own position: %u\n", own_pos);
2573 if (own_pos < path->length - 1)
2574 send_message (message, &pi[own_pos + 1]);
2575 tunnel_delete_peer (t, path->peers[path->length - 1]);
2581 * Core handler for notifications of broken paths
2583 * @param cls closure
2584 * @param message message
2585 * @param peer peer identity this notification is about
2586 * @param atsi performance data
2587 * @param atsi_count number of records in 'atsi'
2589 * @return GNUNET_OK to keep the connection open,
2590 * GNUNET_SYSERR to close it (signal serious error)
2593 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2594 const struct GNUNET_MessageHeader *message,
2595 const struct GNUNET_ATS_Information *atsi,
2596 unsigned int atsi_count)
2598 struct GNUNET_MESH_PathBroken *msg;
2599 struct MeshTunnel *t;
2601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2602 "MESH: Received a PATH BROKEN msg from %s\n",
2604 msg = (struct GNUNET_MESH_PathBroken *) message;
2605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2606 "MESH: regarding %s\n",
2607 GNUNET_i2s(&msg->peer1));
2608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2609 "MESH: regarding %s\n",
2610 GNUNET_i2s(&msg->peer2));
2611 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2614 GNUNET_break_op (0);
2617 tunnel_notify_connection_broken(t,
2618 GNUNET_PEER_search(&msg->peer1),
2619 GNUNET_PEER_search(&msg->peer2));
2626 * Core handler for tunnel destruction
2628 * @param cls closure
2629 * @param message message
2630 * @param peer peer identity this notification is about
2631 * @param atsi performance data
2632 * @param atsi_count number of records in 'atsi'
2634 * @return GNUNET_OK to keep the connection open,
2635 * GNUNET_SYSERR to close it (signal serious error)
2638 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2639 const struct GNUNET_MessageHeader *message,
2640 const struct GNUNET_ATS_Information *atsi,
2641 unsigned int atsi_count)
2643 struct GNUNET_MESH_TunnelDestroy *msg;
2644 struct MeshTunnel *t;
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2647 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2649 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2651 "MESH: for tunnel %s [%u]\n",
2652 GNUNET_i2s (&msg->oid),
2654 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2657 /* TODO notify back: we don't know this tunnel */
2658 GNUNET_break_op (0);
2661 if (t->id.oid == myid)
2663 GNUNET_break_op (0);
2666 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2668 /* Tunnel was incoming, notify clients */
2669 send_clients_tunnel_destroy (t);
2671 tunnel_send_destroy (t);
2678 * Core handler for mesh network traffic going from the origin to a peer
2680 * @param cls closure
2681 * @param peer peer identity this notification is about
2682 * @param message message
2683 * @param atsi performance data
2684 * @param atsi_count number of records in 'atsi'
2685 * @return GNUNET_OK to keep the connection open,
2686 * GNUNET_SYSERR to close it (signal serious error)
2689 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2690 const struct GNUNET_MessageHeader *message,
2691 const struct GNUNET_ATS_Information *atsi,
2692 unsigned int atsi_count)
2694 struct GNUNET_MESH_Unicast *msg;
2695 struct MeshTunnel *t;
2699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2700 "MESH: got a unicast packet from %s\n",
2702 size = ntohs (message->size);
2704 sizeof (struct GNUNET_MESH_Unicast) +
2705 sizeof (struct GNUNET_MessageHeader))
2710 msg = (struct GNUNET_MESH_Unicast *) message;
2711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2712 "MESH: of type %u\n",
2713 ntohs (msg[1].header.type));
2714 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2717 /* TODO notify back: we don't know this tunnel */
2718 GNUNET_break_op (0);
2721 tunnel_reset_timeout (t);
2722 pid = GNUNET_PEER_search(&msg->destination);
2725 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2726 "MESH: it's for us! sending to clients...\n");
2727 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2731 "MESH: not for us, retransmitting...\n");
2732 send_message (message, path_get_first_hop(t->tree, pid));
2738 * Core handler for mesh network traffic going from the origin to all peers
2740 * @param cls closure
2741 * @param message message
2742 * @param peer peer identity this notification is about
2743 * @param atsi performance data
2744 * @param atsi_count number of records in 'atsi'
2745 * @return GNUNET_OK to keep the connection open,
2746 * GNUNET_SYSERR to close it (signal serious error)
2748 * TODO: Check who we got this from, to validate route.
2751 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2752 const struct GNUNET_MessageHeader *message,
2753 const struct GNUNET_ATS_Information *atsi,
2754 unsigned int atsi_count)
2756 struct GNUNET_MESH_Multicast *msg;
2757 struct MeshTunnel *t;
2760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2761 "MESH: got a multicast packet from %s\n",
2763 size = ntohs (message->size);
2764 if (sizeof (struct GNUNET_MESH_Multicast) +
2765 sizeof (struct GNUNET_MessageHeader) > size)
2767 GNUNET_break_op (0);
2770 msg = (struct GNUNET_MESH_Multicast *) message;
2771 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2775 /* TODO notify that we dont know that tunnel */
2776 GNUNET_break_op (0);
2779 tunnel_reset_timeout (t);
2781 /* Transmit to locally interested clients */
2782 if (NULL != t->peers &&
2783 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2785 send_subscribed_clients (message, &msg[1].header);
2787 tunnel_send_multicast(t, message);
2793 * Core handler for mesh network traffic toward the owner of a tunnel
2795 * @param cls closure
2796 * @param message message
2797 * @param peer peer identity this notification is about
2798 * @param atsi performance data
2799 * @param atsi_count number of records in 'atsi'
2801 * @return GNUNET_OK to keep the connection open,
2802 * GNUNET_SYSERR to close it (signal serious error)
2805 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2806 const struct GNUNET_MessageHeader *message,
2807 const struct GNUNET_ATS_Information *atsi,
2808 unsigned int atsi_count)
2810 struct GNUNET_MESH_ToOrigin *msg;
2811 struct GNUNET_PeerIdentity id;
2812 struct MeshPeerInfo *peer_info;
2813 struct MeshTunnel *t;
2816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2817 "MESH: got a ToOrigin packet from %s\n",
2819 size = ntohs (message->size);
2820 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2821 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2823 GNUNET_break_op (0);
2826 msg = (struct GNUNET_MESH_ToOrigin *) message;
2827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2828 "MESH: of type %u\n",
2829 ntohs (msg[1].header.type));
2830 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2834 /* TODO notify that we dont know this tunnel (whom)? */
2835 GNUNET_break_op (0);
2839 if (t->id.oid == myid)
2842 struct GNUNET_MESH_ToOrigin *copy;
2844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2845 "MESH: it's for us! sending to clients...\n");
2846 if (NULL == t->client)
2848 /* got data packet for ownerless tunnel */
2849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2850 "MESH: no clients!\n");
2851 GNUNET_break_op (0);
2854 /* TODO signature verification */
2855 memcpy (cbuf, message, size);
2856 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2857 copy->tid = htonl (t->local_tid);
2858 GNUNET_SERVER_notification_context_unicast (nc,
2864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2865 "MESH: not for us, retransmitting...\n");
2867 peer_info = peer_info_get (&msg->oid);
2868 if (NULL == peer_info)
2870 /* unknown origin of tunnel */
2874 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2875 send_message (message, &id);
2882 * Core handler for path ACKs
2884 * @param cls closure
2885 * @param message message
2886 * @param peer peer identity this notification is about
2887 * @param atsi performance data
2888 * @param atsi_count number of records in 'atsi'
2890 * @return GNUNET_OK to keep the connection open,
2891 * GNUNET_SYSERR to close it (signal serious error)
2894 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2895 const struct GNUNET_MessageHeader *message,
2896 const struct GNUNET_ATS_Information *atsi,
2897 unsigned int atsi_count)
2899 struct GNUNET_MESH_PathACK *msg;
2900 struct GNUNET_PeerIdentity id;
2901 struct MeshTunnelTreeNode *n;
2902 struct MeshPeerInfo *peer_info;
2903 struct MeshTunnel *t;
2905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2906 "MESH: Received a path ACK msg [%s]\n",
2907 GNUNET_i2s(&my_full_id));
2908 msg = (struct GNUNET_MESH_PathACK *) message;
2909 t = tunnel_get (&msg->oid, msg->tid);
2912 /* TODO notify that we don't know the tunnel */
2916 /* Message for us? */
2917 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2920 if (NULL == t->client)
2922 GNUNET_break_op (0);
2925 if (NULL != t->dht_get_type)
2927 GNUNET_DHT_get_stop (t->dht_get_type);
2928 t->dht_get_type = NULL;
2930 peer_info = peer_info_get (&msg->peer_id);
2931 n = tree_find_peer(t->tree->root, peer_info->id);
2934 GNUNET_break_op (0);
2937 n->status = MESH_PEER_READY;
2938 send_client_peer_connected(t, peer_info->id);
2942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2943 "MESH: not for us, retransmitting...\n");
2944 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2945 peer_info = peer_info_get (&msg->oid);
2946 if (NULL == peer_info)
2948 /* If we know the tunnel, we should DEFINITELY know the peer */
2952 send_message (message, &id);
2958 * Functions to handle messages from core
2960 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2961 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2962 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
2963 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
2964 sizeof (struct GNUNET_MESH_PathBroken)},
2965 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
2966 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2967 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2968 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2969 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2970 sizeof (struct GNUNET_MESH_PathACK)},
2976 /******************************************************************************/
2977 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2978 /******************************************************************************/
2981 * deregister_app: iterator for removing each application registered by a client
2983 * @param cls closure
2984 * @param key the hash of the application id (used to access the hashmap)
2985 * @param value the value stored at the key (client)
2987 * @return GNUNET_OK on success
2990 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2992 GNUNET_break (GNUNET_YES ==
2993 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
2999 * notify_client_connection_failure: notify a client that the connection to the
3000 * requested remote peer is not possible (for instance, no route found)
3001 * Function called when the socket is ready to queue more data. "buf" will be
3002 * NULL and "size" zero if the socket was closed for writing in the meantime.
3004 * @param cls closure
3005 * @param size number of bytes available in buf
3006 * @param buf where the callee should write the message
3007 * @return number of bytes written to buf
3010 notify_client_connection_failure (void *cls, size_t size, void *buf)
3013 struct MeshPeerInfo *peer_info;
3014 struct GNUNET_MESH_PeerControl *msg;
3015 struct GNUNET_PeerIdentity id;
3017 if (0 == size && NULL == buf)
3019 // TODO retry? cancel?
3023 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3024 peer_info = (struct MeshPeerInfo *) cls;
3025 msg = (struct GNUNET_MESH_PeerControl *) buf;
3026 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3027 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3028 // msg->tunnel_id = htonl(peer_info->t->tid);
3029 GNUNET_PEER_resolve (peer_info->id, &id);
3030 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3038 * Send keepalive packets for a peer
3040 * @param cls Closure (tunnel for which to send the keepalive).
3041 * @param tc Notification context.
3043 * TODO: implement explicit multicast keepalive?
3046 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3048 struct MeshTunnel *t = cls;
3049 struct GNUNET_MessageHeader *payload;
3050 struct GNUNET_MESH_Multicast *msg;
3051 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3052 sizeof(struct GNUNET_MessageHeader);
3055 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3059 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3062 "MESH: sending keepalive for tunnel %d\n",
3065 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3066 msg->header.size = htons (size);
3067 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3068 msg->oid = my_full_id;
3069 msg->tid = htonl(t->id.tid);
3070 payload = (struct GNUNET_MessageHeader *) &msg[1];
3071 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3072 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3073 tunnel_send_multicast (t, &msg->header);
3075 t->path_refresh_task =
3076 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3082 * Function to process paths received for a new peer addition. The recorded
3083 * paths form the initial tunnel, which can be optimized later.
3084 * Called on each result obtained for the DHT search.
3086 * @param cls closure
3087 * @param exp when will this value expire
3088 * @param key key of the result
3089 * @param type type of the result
3090 * @param size number of bytes in data
3091 * @param data pointer to the result data
3093 * TODO: re-issue the request after certain time? cancel after X results?
3096 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3097 const GNUNET_HashCode * key,
3098 const struct GNUNET_PeerIdentity *get_path,
3099 unsigned int get_path_length,
3100 const struct GNUNET_PeerIdentity *put_path,
3101 unsigned int put_path_length,
3102 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3104 struct MeshPathInfo *path_info = cls;
3105 struct MeshPeerPath *p;
3106 struct GNUNET_PeerIdentity pi;
3109 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3110 "MESH: Got results from DHT!\n");
3111 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3112 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3114 GNUNET_h2s_full(&pi.hashPubKey));
3115 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3116 // path_info->peer->dhtget = NULL;
3118 p = path_build_from_dht (get_path, get_path_length,
3119 put_path, put_path_length);
3120 path_add_to_peer (path_info->peer, p);
3121 for (i = 0; i < path_info->peer->ntunnels; i++)
3123 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3124 peer_info_connect(path_info->peer, path_info->t);
3126 GNUNET_free (path_info);
3133 * Function to process paths received for a new peer addition. The recorded
3134 * paths form the initial tunnel, which can be optimized later.
3135 * Called on each result obtained for the DHT search.
3137 * @param cls closure
3138 * @param exp when will this value expire
3139 * @param key key of the result
3140 * @param type type of the result
3141 * @param size number of bytes in data
3142 * @param data pointer to the result data
3145 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3146 const GNUNET_HashCode * key,
3147 const struct GNUNET_PeerIdentity *get_path,
3148 unsigned int get_path_length,
3149 const struct GNUNET_PeerIdentity *put_path,
3150 unsigned int put_path_length,
3151 enum GNUNET_BLOCK_Type type, size_t size,
3154 const struct GNUNET_PeerIdentity *pi = data;
3155 struct MeshTunnel *t = cls;
3156 struct MeshPeerInfo *peer_info;
3157 struct MeshPeerPath *p;
3159 if (size != sizeof (struct GNUNET_PeerIdentity))
3161 GNUNET_break_op (0);
3164 GNUNET_assert (NULL != t->client);
3165 peer_info = peer_info_get (pi);
3166 (void) GNUNET_CONTAINER_multihashmap_put (
3170 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3172 p = path_build_from_dht (get_path, get_path_length,
3173 put_path, put_path_length);
3174 path_add_to_peer (peer_info, p);
3175 tunnel_add_peer(t, peer_info);
3176 peer_info_connect (peer_info, t);
3180 /******************************************************************************/
3181 /********************* MESH LOCAL HANDLES **************************/
3182 /******************************************************************************/
3186 * Handler for client disconnection
3188 * @param cls closure
3189 * @param client identification of the client; NULL
3190 * for the last call when the server is destroyed
3193 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3195 struct MeshClient *c;
3196 struct MeshClient *next;
3198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3200 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3204 if (c->handle != client && NULL != client)
3206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3211 if (NULL != c->tunnels)
3213 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3214 &tunnel_destroy_iterator,
3216 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3219 /* deregister clients applications */
3220 if (NULL != c->apps)
3222 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3223 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3225 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3226 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3228 GNUNET_SCHEDULER_cancel (announce_applications_task);
3229 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3231 if (NULL != c->types)
3232 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3233 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3245 * Handler for new clients
3247 * @param cls closure
3248 * @param client identification of the client
3249 * @param message the actual message, which includes messages the client wants
3252 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3253 const struct GNUNET_MessageHeader *message)
3255 struct GNUNET_MESH_ClientConnect *cc_msg;
3256 struct MeshClient *c;
3257 GNUNET_MESH_ApplicationType *a;
3264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3265 /* Check data sanity */
3266 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3267 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3268 ntypes = ntohs (cc_msg->types);
3269 napps = ntohs (cc_msg->applications);
3271 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3274 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3278 /* Create new client structure */
3279 c = GNUNET_malloc (sizeof (struct MeshClient));
3281 c->id = next_client_id++;
3284 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3287 GNUNET_MESH_ApplicationType at;
3290 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3291 for (i = 0; i < napps; i++)
3294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3295 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3296 /* store in clients hashmap */
3297 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3298 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3299 /* store in global hashmap, for announcements */
3300 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3301 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3303 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3304 announce_applications_task =
3305 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3313 t = (uint16_t *) & a[napps];
3314 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3315 for (i = 0; i < ntypes; i++)
3318 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3320 /* store in clients hashmap */
3321 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3322 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3323 /* store in global hashmap */
3324 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3325 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3329 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3331 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3332 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3333 GNUNET_SERVER_notification_context_add (nc, client);
3335 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3337 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3343 * Handler for requests of new tunnels
3345 * @param cls closure
3346 * @param client identification of the client
3347 * @param message the actual message
3350 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3351 const struct GNUNET_MessageHeader *message)
3353 struct GNUNET_MESH_TunnelMessage *t_msg;
3354 struct MeshTunnel *t;
3355 struct MeshClient *c;
3356 GNUNET_HashCode hash;
3358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3360 /* Sanity check for client registration */
3361 if (NULL == (c = client_get (client)))
3364 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3371 /* Message sanity check */
3372 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3375 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3379 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3380 /* Sanity check for tunnel numbering */
3381 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3384 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3387 /* Sanity check for duplicate tunnel IDs */
3388 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3391 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3395 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
3397 while (NULL != tunnel_get_by_pi (myid, next_tid))
3398 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3399 t->id.tid = next_tid++;
3401 t->local_tid = ntohl (t_msg->tunnel_id);
3403 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3405 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3407 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
3408 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3411 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3415 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3417 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3418 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3421 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3424 t->tree = tree_new (t, myid);
3425 t->tree->refresh = REFRESH_PATH_TIME;
3426 t->tree->root->status = MESH_PEER_READY;
3427 t->tree->me = t->tree->root;
3429 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3435 * Handler for requests of deleting tunnels
3437 * @param cls closure
3438 * @param client identification of the client
3439 * @param message the actual message
3442 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3443 const struct GNUNET_MessageHeader *message)
3445 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3446 struct MeshClient *c;
3447 struct MeshTunnel *t;
3448 MESH_TunnelNumber tid;
3449 GNUNET_HashCode hash;
3451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3452 "MESH: Got a DESTROY TUNNEL from client!\n");
3454 /* Sanity check for client registration */
3455 if (NULL == (c = client_get (client)))
3458 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3461 /* Message sanity check */
3462 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3465 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3471 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3473 /* Retrieve tunnel */
3474 tid = ntohl (tunnel_msg->tunnel_id);
3476 /* Remove from local id hashmap */
3477 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3478 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3479 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
3482 tunnel_send_destroy (t);
3484 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3490 * Handler for connection requests to new peers
3492 * @param cls closure
3493 * @param client identification of the client
3494 * @param message the actual message (PeerControl)
3497 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3498 const struct GNUNET_MessageHeader *message)
3500 struct GNUNET_MESH_PeerControl *peer_msg;
3501 struct MeshPeerInfo *peer_info;
3502 struct MeshClient *c;
3503 struct MeshTunnel *t;
3504 MESH_TunnelNumber tid;
3506 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3507 /* Sanity check for client registration */
3508 if (NULL == (c = client_get (client)))
3511 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3515 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3516 /* Sanity check for message size */
3517 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3520 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3524 /* Tunnel exists? */
3525 tid = ntohl (peer_msg->tunnel_id);
3526 t = tunnel_get_by_local_id (c, tid);
3530 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3534 /* Does client own tunnel? */
3535 if (t->client->handle != client)
3538 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3541 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3542 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
3543 peer_info = peer_info_get (&peer_msg->peer);
3545 tunnel_add_peer(t, peer_info);
3546 peer_info_connect(peer_info, t);
3548 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3554 * Handler for disconnection requests of peers in a tunnel
3556 * @param cls closure
3557 * @param client identification of the client
3558 * @param message the actual message (PeerControl)
3561 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3562 const struct GNUNET_MessageHeader *message)
3564 struct GNUNET_MESH_PeerControl *peer_msg;
3565 struct MeshPeerInfo *peer_info;
3566 struct MeshClient *c;
3567 struct MeshTunnel *t;
3568 MESH_TunnelNumber tid;
3570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3571 /* Sanity check for client registration */
3572 if (NULL == (c = client_get (client)))
3575 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3578 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3579 /* Sanity check for message size */
3580 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3583 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3587 /* Tunnel exists? */
3588 tid = ntohl (peer_msg->tunnel_id);
3589 t = tunnel_get_by_local_id (c, tid);
3593 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3598 /* Does client own tunnel? */
3599 if (t->client->handle != client)
3602 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3607 "MESH: for peer %s\n",
3608 GNUNET_i2s(&peer_msg->peer));
3609 /* Is the peer in the tunnel? */
3610 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3611 &peer_msg->peer.hashPubKey);
3612 if (NULL == peer_info)
3615 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3619 /* Ok, delete peer from tunnel */
3620 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3621 &peer_msg->peer.hashPubKey);
3623 send_destroy_path (t, peer_info->id);
3624 tunnel_delete_peer(t, peer_info->id);
3625 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3631 * Handler for connection requests to new peers by type
3633 * @param cls closure
3634 * @param client identification of the client
3635 * @param message the actual message (ConnectPeerByType)
3638 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3639 const struct GNUNET_MessageHeader *message)
3641 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3642 struct MeshClient *c;
3643 struct MeshTunnel *t;
3644 GNUNET_HashCode hash;
3645 MESH_TunnelNumber tid;
3647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3648 /* Sanity check for client registration */
3649 if (NULL == (c = client_get (client)))
3652 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3656 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3657 /* Sanity check for message size */
3658 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3659 ntohs (connect_msg->header.size))
3662 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3666 /* Tunnel exists? */
3667 tid = ntohl (connect_msg->tunnel_id);
3668 t = tunnel_get_by_local_id (c, tid);
3672 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3676 /* Does client own tunnel? */
3677 if (t->client->handle != client)
3680 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3684 /* Do WE have the service? */
3685 t->type = ntohl (connect_msg->type);
3686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3687 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3688 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3691 /* Yes! Fast forward, add ourselves to the tunnel and send the
3692 * good news to the client
3694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3695 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3696 peer_info_get (&my_full_id),
3697 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3700 send_client_peer_connected(t, myid);
3701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3702 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3705 /* Ok, lets find a peer offering the service */
3706 if (NULL != t->dht_get_type)
3708 GNUNET_DHT_get_stop (t->dht_get_type);
3710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3711 GNUNET_h2s_full (&hash));
3713 GNUNET_DHT_get_start (dht_handle,
3714 GNUNET_TIME_UNIT_FOREVER_REL,
3715 GNUNET_BLOCK_TYPE_TEST,
3718 GNUNET_DHT_RO_RECORD_ROUTE |
3719 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3721 &dht_get_type_handler, t);
3723 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3729 * Handler for client traffic directed to one peer
3731 * @param cls closure
3732 * @param client identification of the client
3733 * @param message the actual message
3736 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3737 const struct GNUNET_MessageHeader *message)
3739 struct MeshClient *c;
3740 struct MeshTunnel *t;
3741 struct MeshPeerInfo *pi;
3742 struct GNUNET_MESH_Unicast *data_msg;
3743 MESH_TunnelNumber tid;
3746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3747 "MESH: Got a unicast request from a client!\n");
3749 /* Sanity check for client registration */
3750 if (NULL == (c = client_get (client)))
3753 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3756 data_msg = (struct GNUNET_MESH_Unicast *) message;
3757 /* Sanity check for message size */
3758 size = ntohs (message->size);
3759 if (sizeof (struct GNUNET_MESH_Unicast) +
3760 sizeof (struct GNUNET_MessageHeader) > size)
3763 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3767 /* Tunnel exists? */
3768 tid = ntohl (data_msg->tid);
3769 t = tunnel_get_by_local_id (c, tid);
3773 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3777 /* Is it a local tunnel? Then, does client own the tunnel? */
3778 if (NULL != t->client &&
3779 NULL != t->client->handle &&
3780 t->client->handle != client)
3783 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3787 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3788 &data_msg->destination.hashPubKey);
3789 /* Is the selected peer in the tunnel? */
3793 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3797 /* Ok, everything is correct, send the message
3798 * (pretend we got it from a mesh peer)
3801 char buf[ntohs (message->size)];
3802 struct GNUNET_MESH_Unicast *copy;
3804 /* Work around const limitation */
3805 copy = (struct GNUNET_MESH_Unicast *) buf;
3806 memcpy (buf, data_msg, size);
3807 copy->oid = my_full_id;
3808 copy->tid = htonl (t->id.tid);
3809 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3810 "MESH: calling generic handler...\n");
3811 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3813 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3819 * Handler for client traffic directed to the origin
3821 * @param cls closure
3822 * @param client identification of the client
3823 * @param message the actual message
3826 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3827 const struct GNUNET_MessageHeader *message)
3829 struct GNUNET_MESH_ToOrigin *data_msg;
3830 struct GNUNET_PeerIdentity id;
3831 struct MeshClient *c;
3832 struct MeshTunnel *t;
3833 MESH_TunnelNumber tid;
3836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3837 "MESH: Got a ToOrigin request from a client!\n");
3839 /* Sanity check for client registration */
3840 if (NULL == (c = client_get (client)))
3843 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3846 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3847 /* Sanity check for message size */
3848 size = ntohs (message->size);
3849 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3850 sizeof (struct GNUNET_MessageHeader) > size)
3853 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3857 /* Tunnel exists? */
3858 tid = ntohl (data_msg->tid);
3859 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3862 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3865 t = tunnel_get_by_local_id (c, tid);
3869 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3873 /* It shouldn't be a local tunnel. */
3874 if (NULL != t->client)
3877 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3880 GNUNET_PEER_resolve(t->id.oid, &id);
3882 /* Ok, everything is correct, send the message
3883 * (pretend we got it from a mesh peer)
3886 char buf[ntohs (message->size)];
3887 struct GNUNET_MESH_ToOrigin *copy;
3889 /* Work around const limitation */
3890 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3891 memcpy (buf, data_msg, size);
3893 copy->tid = htonl (t->id.tid);
3894 copy->sender = my_full_id;
3895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3896 "MESH: calling generic handler...\n");
3897 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3899 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3905 * Handler for client traffic directed to all peers in a tunnel
3907 * @param cls closure
3908 * @param client identification of the client
3909 * @param message the actual message
3912 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3913 const struct GNUNET_MessageHeader *message)
3915 struct MeshClient *c;
3916 struct MeshTunnel *t;
3917 struct GNUNET_MESH_Multicast *data_msg;
3918 MESH_TunnelNumber tid;
3920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3921 "MESH: Got a multicast request from a client!\n");
3923 /* Sanity check for client registration */
3924 if (NULL == (c = client_get (client)))
3927 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3930 data_msg = (struct GNUNET_MESH_Multicast *) message;
3931 /* Sanity check for message size */
3932 if (sizeof (struct GNUNET_MESH_Multicast) +
3933 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
3936 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3940 /* Tunnel exists? */
3941 tid = ntohl (data_msg->tid);
3942 t = tunnel_get_by_local_id (c, tid);
3946 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3950 /* Does client own tunnel? */
3951 if (t->client->handle != client)
3954 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3959 char buf[ntohs(message->size)];
3960 struct GNUNET_MESH_Multicast *copy;
3962 copy = (struct GNUNET_MESH_Multicast *)buf;
3963 memcpy(buf, message, ntohs(message->size));
3964 copy->oid = my_full_id;
3965 copy->tid = htonl(t->id.tid);
3966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3967 "MESH: calling generic handler...\n");
3968 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
3971 /* receive done gets called when last copy is sent to a neighbor */
3976 * Functions to handle messages from clients
3978 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3979 {&handle_local_new_client, NULL,
3980 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3981 {&handle_local_tunnel_create, NULL,
3982 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3983 sizeof (struct GNUNET_MESH_TunnelMessage)},
3984 {&handle_local_tunnel_destroy, NULL,
3985 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3986 sizeof (struct GNUNET_MESH_TunnelMessage)},
3987 {&handle_local_connect_add, NULL,
3988 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3989 sizeof (struct GNUNET_MESH_PeerControl)},
3990 {&handle_local_connect_del, NULL,
3991 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3992 sizeof (struct GNUNET_MESH_PeerControl)},
3993 {&handle_local_connect_by_type, NULL,
3994 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3995 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3996 {&handle_local_unicast, NULL,
3997 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3998 {&handle_local_to_origin, NULL,
3999 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4000 {&handle_local_multicast, NULL,
4001 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4007 * To be called on core init/fail.
4009 * @param cls service closure
4010 * @param server handle to the server for this service
4011 * @param identity the public identity of this peer
4014 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4015 const struct GNUNET_PeerIdentity *identity)
4017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4018 core_handle = server;
4019 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4021 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4022 GNUNET_SCHEDULER_shutdown();
4028 * Method called whenever a given peer connects.
4030 * @param cls closure
4031 * @param peer peer identity this notification is about
4032 * @param atsi performance data for the connection
4033 * @param atsi_count number of records in 'atsi'
4036 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4037 const struct GNUNET_ATS_Information *atsi,
4038 unsigned int atsi_count)
4040 struct MeshPeerInfo *peer_info;
4041 struct MeshPeerPath *path;
4043 #if MESH_DEBUG_CONNECTION
4044 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4046 GNUNET_h2s(&my_full_id.hashPubKey));
4048 peer_info = peer_info_get (peer);
4049 if (myid == peer_info->id)
4051 #if MESH_DEBUG_CONNECTION
4052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4056 #if MESH_DEBUG_CONNECTION
4059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4060 GNUNET_h2s(&peer->hashPubKey));
4063 path = path_new (2);
4064 path->peers[0] = myid;
4065 path->peers[1] = peer_info->id;
4066 GNUNET_PEER_change_rc(myid, 1);
4067 GNUNET_PEER_change_rc(peer_info->id, 1);
4068 path_add_to_peer (peer_info, path);
4073 * Method called whenever a peer disconnects.
4075 * @param cls closure
4076 * @param peer peer identity this notification is about
4079 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4081 struct MeshPeerInfo *pi;
4084 #if MESH_DEBUG_CONNECTION
4085 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4087 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4093 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4095 /* TODO: notify that the transmission failed */
4096 peer_info_cancel_transmission(pi, i);
4098 path_remove_from_peer (pi, pi->id, myid);
4099 #if MESH_DEBUG_CONNECTION
4102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4109 /******************************************************************************/
4110 /************************ MAIN FUNCTIONS ****************************/
4111 /******************************************************************************/
4114 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4116 * @param cls closure
4117 * @param key current key code
4118 * @param value value in the hash map
4119 * @return GNUNET_YES if we should continue to iterate,
4123 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4125 struct MeshTunnel *t = value;
4131 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4133 * @param cls closure
4134 * @param key current key code
4135 * @param value value in the hash map
4136 * @return GNUNET_YES if we should continue to iterate,
4140 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4142 struct MeshPeerInfo *p = value;
4143 peer_info_destroy(p);
4148 * Task run during shutdown.
4154 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4157 /* TODO: destroy tunnels? */
4158 if (core_handle != NULL)
4160 GNUNET_CORE_disconnect (core_handle);
4163 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4164 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4165 if (dht_handle != NULL)
4167 GNUNET_DHT_disconnect (dht_handle);
4172 GNUNET_SERVER_notification_context_destroy (nc);
4175 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4177 GNUNET_SCHEDULER_cancel (announce_id_task);
4178 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4184 * Process mesh requests.
4186 * @param cls closure
4187 * @param server the initialized server
4188 * @param c configuration to use
4191 run (void *cls, struct GNUNET_SERVER_Handle *server,
4192 const struct GNUNET_CONFIGURATION_Handle *c)
4194 struct MeshPeerInfo *peer;
4195 struct MeshPeerPath *p;
4198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4199 server_handle = server;
4200 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4201 CORE_QUEUE_SIZE, /* queue size */
4202 NULL, /* Closure passed to MESH functions */
4203 &core_init, /* Call core_init once connected */
4204 &core_connect, /* Handle connects */
4205 &core_disconnect, /* remove peers on disconnects */
4206 NULL, /* Don't notify about all incoming messages */
4207 GNUNET_NO, /* For header only in notification */
4208 NULL, /* Don't notify about all outbound messages */
4209 GNUNET_NO, /* For header-only out notification */
4210 core_handlers); /* Register these handlers */
4211 if (core_handle == NULL)
4214 GNUNET_SCHEDULER_shutdown ();
4219 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4222 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4224 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4225 GNUNET_SCHEDULER_shutdown ();
4228 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4229 GNUNET_free (keyfile);
4230 if (my_private_key == NULL)
4232 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4233 _("Mesh service could not access hostkey. Exiting.\n"));
4234 GNUNET_SCHEDULER_shutdown ();
4237 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4238 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4239 &my_full_id.hashPubKey);
4240 myid = GNUNET_PEER_intern (&my_full_id);
4242 dht_handle = GNUNET_DHT_connect (c, 64);
4243 if (dht_handle == NULL)
4249 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4251 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4252 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4253 peers = GNUNET_CONTAINER_multihashmap_create (32);
4254 applications = GNUNET_CONTAINER_multihashmap_create (32);
4255 types = GNUNET_CONTAINER_multihashmap_create (32);
4257 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4258 nc = GNUNET_SERVER_notification_context_create (server_handle,
4260 GNUNET_SERVER_disconnect_notify (server_handle,
4261 &handle_local_client_disconnect,
4266 clients_tail = NULL;
4271 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4272 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4274 /* Create a peer_info for the local peer */
4275 peer = peer_info_get(&my_full_id);
4278 path_add_to_peer(peer, p);
4280 /* Scheduled the task to clean up when shutdown is called */
4281 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4288 * The main function for the mesh service.
4290 * @param argc number of arguments from the command line
4291 * @param argv command line arguments
4292 * @return 0 ok, 1 on error
4295 main (int argc, char *const *argv)
4299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4302 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4304 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");