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 GNUNET_assert (GNUNET_YES ==
1305 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi));
1306 if (NULL != pi->dhtget)
1308 GNUNET_DHT_get_stop(pi->dhtget);
1309 GNUNET_free (pi->dhtgetcls);
1311 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1313 peer_info_cancel_transmission(pi, i);
1319 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1329 * Remove all paths that rely on a direct connection between p1 and p2
1330 * from the peer itself and notify all tunnels about it.
1332 * @param peer PeerInfo of affected peer.
1333 * @param p1 GNUNET_PEER_Id of one peer.
1334 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1337 * TODO: optimize (see below)
1340 path_remove_from_peer (struct MeshPeerInfo *peer,
1344 struct MeshPeerPath *p;
1345 struct MeshPeerPath *aux;
1346 struct MeshPeerInfo *peer_d;
1348 unsigned int destroyed;
1354 p = peer->path_head;
1358 for (i = 0; i < (p->length - 1); i++)
1360 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1361 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1363 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1374 for (i = 0; i < peer->ntunnels; i++)
1376 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1378 * Problem: one or more peers have been deleted from the tunnel tree.
1379 * We don't know who they are to try to add them again.
1380 * We need to try to find a new path for each of the disconnected peers.
1381 * Some of them might already have a path to reach them that does not
1382 * involve p1 and p2. Adding all anew might render in a better tree than
1383 * the trivial immediate fix.
1385 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1386 * its children will be reachable trough him.
1388 peer_d = peer_info_get_short(d);
1391 for (p = peer_d->path_head; NULL != p; p = p->next)
1393 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1401 /* No callback, as peer will be already disconnected */
1402 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1406 peer_info_connect (peer_d, peer->tunnels[i]);
1413 * Add the path to the peer and update the path used to reach it in case this
1416 * @param peer_info Destination peer to add the path to.
1417 * @param path New path to add. Last peer must be the peer in arg 1.
1418 * Path will be either used of freed if already known.
1420 * TODO: trim the part from origin to us? Add it as path to origin?
1423 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1425 struct MeshPeerPath *aux;
1429 if (NULL == peer_info || NULL == path)
1435 l = path_get_length (path);
1442 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1444 l2 = path_get_length (aux);
1447 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1448 peer_info->path_tail, aux, path);
1452 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1459 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1466 * Add the path to the origin peer and update the path used to reach it in case
1467 * this is the shortest.
1468 * The path is given in peer_info -> destination, therefore we turn the path
1469 * upside down first.
1471 * @param peer_info Peer to add the path to, being the origin of the path.
1472 * @param path New path to add after being inversed.
1475 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1478 path_add_to_peer (peer_info, path);
1483 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1484 * to obtain a local peer -> destination path and interning the peer ids.
1486 * @return Newly allocated and created path
1488 static struct MeshPeerPath *
1489 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1490 unsigned int get_path_length,
1491 const struct GNUNET_PeerIdentity *put_path,
1492 unsigned int put_path_length)
1494 struct MeshPeerPath *p;
1500 GNUNET_PEER_change_rc(myid, 1);
1501 i = get_path_length;
1502 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1503 for (i--; i >= 0; i--)
1505 id = GNUNET_PEER_intern (&get_path[i]);
1506 if (p->length > 0 && id == p->peers[p->length - 1])
1508 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1509 GNUNET_PEER_change_rc(id, -1);
1513 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1514 "MESH: Adding from GET: %s.\n",
1515 GNUNET_i2s(&get_path[i]));
1517 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1518 p->peers[p->length - 1] = id;
1521 i = put_path_length;
1522 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1523 for (i--; i >= 0; i--)
1525 id = GNUNET_PEER_intern (&put_path[i]);
1528 /* PUT path went through us, so discard the path up until now and start
1529 * from here to get a much shorter (and loop-free) path.
1534 if (p->length > 0 && id == p->peers[p->length - 1])
1536 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1537 GNUNET_PEER_change_rc(id, -1);
1541 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1542 "MESH: Adding from PUT: %s.\n",
1543 GNUNET_i2s(&put_path[i]));
1545 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1546 p->peers[p->length - 1] = id;
1550 if (get_path_length > 0)
1551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1552 "MESH: (first of GET: %s)\n",
1553 GNUNET_h2s_full(&get_path[0].hashPubKey));
1554 if (put_path_length > 0)
1555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1556 "MESH: (first of PUT: %s)\n",
1557 GNUNET_h2s_full(&put_path[0].hashPubKey));
1558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1559 "MESH: In total: %d hops\n",
1561 for (i = 0; i < p->length; i++)
1563 struct GNUNET_PeerIdentity peer_id;
1565 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1569 GNUNET_h2s_full(&peer_id.hashPubKey));
1577 * Send keepalive packets for a peer
1579 * @param cls Closure (tunnel for which to send the keepalive).
1580 * @param tc Notification context.
1582 * TODO: implement explicit multicast keepalive?
1585 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1589 * Search for a tunnel among the tunnels for a client
1591 * @param c the client whose tunnels to search in
1592 * @param tid the local id of the tunnel
1594 * @return tunnel handler, NULL if doesn't exist
1596 static struct MeshTunnel *
1597 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1599 GNUNET_HashCode hash;
1601 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1602 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1604 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1606 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1611 * Search for a tunnel by global ID using PEER_ID
1613 * @param pi owner of the tunnel
1614 * @param tid global tunnel number
1616 * @return tunnel handler, NULL if doesn't exist
1618 static struct MeshTunnel *
1619 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1621 struct MESH_TunnelID id;
1622 GNUNET_HashCode hash;
1627 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1628 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1633 * Search for a tunnel by global ID using full PeerIdentities
1635 * @param oid owner of the tunnel
1636 * @param tid global tunnel number
1638 * @return tunnel handler, NULL if doesn't exist
1640 static struct MeshTunnel *
1641 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1643 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1648 * Callback used to notify a client owner of a tunnel that a peer has
1649 * disconnected, most likely because of a path change.
1651 * @param n Node in the tree representing the disconnected peer
1653 * FIXME: pass tunnel via cls, make param just a peer identity
1656 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1658 struct MeshPeerInfo *peer;
1660 if (NULL != n->t->client && NULL != nc)
1662 struct GNUNET_MESH_PeerControl msg;
1663 msg.header.size = htons (sizeof (msg));
1664 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1665 msg.tunnel_id = htonl (n->t->local_tid);
1666 GNUNET_PEER_resolve (n->peer, &msg.peer);
1667 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1668 &msg.header, GNUNET_NO);
1670 peer = peer_info_get_short(n->peer);
1671 peer_info_connect(peer, n->t);
1676 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1677 * needed rescources.
1678 * If peer already exists, reevaluate shortest path and change if different.
1680 * @param t Tunnel we want to add a new peer to
1681 * @param peer PeerInfo of the peer being added
1685 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1687 struct GNUNET_PeerIdentity id;
1688 struct MeshPeerPath *best_p;
1689 struct MeshPeerPath *p;
1690 unsigned int best_cost;
1693 GNUNET_PEER_resolve(peer->id, &id);
1695 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1698 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1699 GNUNET_CONTAINER_multihashmap_put(
1703 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1706 if (NULL != (p = peer->path_head))
1709 best_cost = path_get_cost(t->tree, p);
1712 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1719 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1720 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1721 t->path_refresh_task =
1722 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1726 /* Start a DHT get if necessary */
1727 peer_info_connect(peer, t);
1732 * Add a path to a tunnel which we don't own, just to remember the next hop.
1733 * If destination node was already in the tunnel, the first hop information
1734 * will be replaced with the new path.
1736 * @param t Tunnel we want to add a new peer to
1737 * @param p Path to add
1738 * @param own_pos Position of local node in path.
1742 tunnel_add_path (struct MeshTunnel *t,
1743 struct MeshPeerPath *p,
1744 unsigned int own_pos)
1746 struct GNUNET_PeerIdentity id;
1748 GNUNET_assert (0 != own_pos);
1749 tree_add_path(t->tree, p, NULL);
1750 if (NULL == t->tree->me)
1751 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1752 if (own_pos < p->length - 1)
1754 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1755 tree_update_first_hops(t->tree, t->tree->me, &id);
1761 * Notifies a tunnel that a connection has broken that affects at least
1762 * some of its peers. Sends a notification towards the root of the tree.
1763 * In case the peer is the owner of the tree, notifies the client that owns
1764 * the tunnel and tries to reconnect.
1766 * @param t Tunnel affected.
1767 * @param p1 Peer that got disconnected from p2.
1768 * @param p2 Peer that got disconnected from p1.
1770 * @return Short ID of the peer disconnected (either p1 or p2).
1771 * 0 if the tunnel remained unaffected.
1773 static GNUNET_PEER_Id
1774 tunnel_notify_connection_broken (struct MeshTunnel *t,
1780 pid = tree_notify_connection_broken (t->tree,
1783 ¬ify_peer_disconnected);
1784 if (myid != p1 && myid != p2)
1790 if (NULL != t->tree->me->parent)
1792 /* We are the peer still connected, notify owner of the disconnection. */
1793 struct GNUNET_MESH_PathBroken msg;
1794 struct GNUNET_PeerIdentity neighbor;
1796 msg.header.size = htons (sizeof (msg));
1797 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1798 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1799 msg.tid = htonl (t->id.tid);
1800 msg.peer1 = my_full_id;
1801 GNUNET_PEER_resolve (pid, &msg.peer2);
1802 GNUNET_PEER_resolve (t->tree->me->parent->peer, &neighbor);
1803 send_message (&msg.header, &neighbor);
1811 * Send a message in a tunnel in multicast, sending a copy to each child node
1812 * down the local one in the tunnel tree.
1814 * @param t Tunnel in which to send the data.
1815 * @param msg Message to be sent
1817 * @return Number of copies sent.
1820 tunnel_send_multicast (struct MeshTunnel *t,
1821 const struct GNUNET_MessageHeader *msg)
1823 struct GNUNET_PeerIdentity neighbor;
1824 struct MeshDataDescriptor *info;
1825 struct MeshTunnelTreeNode *n;
1826 unsigned int *copies;
1831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1832 "MESH: sending a multicast packet...\n");
1833 size = ntohs (msg->size);
1834 GNUNET_assert (NULL != t->tree->me);
1835 n = t->tree->me->children_head;
1838 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1839 "MESH: no children in the tree, no one to send.\n");
1842 copies = GNUNET_malloc (sizeof (unsigned int));
1843 for (*copies = 0; NULL != n; n = n->next)
1845 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1846 n = t->tree->me->children_head;
1847 data = GNUNET_malloc (size);
1848 memcpy (data, msg, size);
1851 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1854 info->copies = copies;
1855 if (NULL != t->client)
1857 info->client = t->client->handle;
1858 info->timeout_task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1862 info->destination = n->peer;
1863 GNUNET_PEER_resolve (n->peer, &neighbor);
1864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1865 "MESH: sending to %s...\n",
1866 GNUNET_i2s (&neighbor));
1867 info->peer = peer_info_get(&neighbor);
1868 GNUNET_assert (NULL != info->peer);
1869 i = peer_info_transmit_slot(info->peer);
1870 info->handler_n = i;
1871 info->peer->infos[i] = info;
1872 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1873 info->peer->core_transmit[i] =
1874 GNUNET_CORE_notify_transmit_ready (core_handle,
1877 GNUNET_TIME_UNIT_FOREVER_REL,
1880 &send_core_data_multicast, info);
1888 * Send a message to all peers in this tunnel that the tunnel is no longer
1891 * @param t The tunnel whose peers to notify.
1894 tunnel_send_destroy (struct MeshTunnel *t)
1896 struct GNUNET_MESH_TunnelDestroy msg;
1898 msg.header.size = htons (sizeof (msg));
1899 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
1900 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1901 msg.tid = htonl (t->id.tid);
1902 tunnel_send_multicast (t, &msg.header);
1908 * Destroy the tunnel and free any allocated resources linked to it
1910 * @param t the tunnel to destroy
1912 * @return GNUNET_OK on success
1915 tunnel_destroy (struct MeshTunnel *t)
1917 struct MeshClient *c;
1918 struct MeshQueue *q;
1919 struct MeshQueue *qn;
1920 GNUNET_HashCode hash;
1929 struct GNUNET_PeerIdentity id;
1931 GNUNET_PEER_resolve(t->id.oid, &id);
1932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1933 "MESH: destroying tunnel %s [%x]\n",
1937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1941 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1942 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1947 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1949 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1953 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1955 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1956 GNUNET_break (GNUNET_YES ==
1957 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
1960 if (NULL != t->peers)
1962 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
1963 &peer_info_delete_tunnel, t);
1964 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1969 if (NULL != q->data)
1970 GNUNET_free (q->data);
1974 /* TODO cancel core transmit ready in case it was active */
1976 tree_destroy(t->tree);
1977 if (NULL != t->dht_get_type)
1978 GNUNET_DHT_get_stop(t->dht_get_type);
1979 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
1980 GNUNET_SCHEDULER_cancel(t->timeout_task);
1981 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
1982 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
1989 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1990 * that are no longer needed, as well as nodes of no longer reachable peers.
1991 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1993 * @param t Tunnel from which to remove the path.
1994 * @param p Peer which should be removed.
1997 tunnel_delete_peer (struct MeshTunnel *t,
1998 GNUNET_PEER_Id peer)
2000 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
2001 if (NULL == t->tree->root)
2007 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2008 * client when the client disconnects.
2010 * @param cls closure (client that is disconnecting)
2011 * @param key the hash of the local tunnel id (used to access the hashmap)
2012 * @param value the value stored at the key (tunnel to destroy)
2014 * @return GNUNET_OK on success
2017 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2019 struct MeshTunnel *t = value;
2022 if (NULL != t->dht_get_type)
2024 GNUNET_DHT_get_stop (t->dht_get_type);
2026 r = tunnel_destroy (t);
2032 * Timeout function, destroys tunnel if called
2034 * @param cls Closure (tunnel to destroy).
2035 * @param tc TaskContext
2038 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2040 struct MeshTunnel *t = cls;
2042 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2044 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2049 * Resets the tunnel timeout. Starts it if no timeout was running.
2051 * @param t Tunnel whose timeout to reset.
2054 tunnel_reset_timeout (struct MeshTunnel *t)
2056 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2057 GNUNET_SCHEDULER_cancel (t->timeout_task);
2058 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2059 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2065 /******************************************************************************/
2066 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2067 /******************************************************************************/
2070 * Function called to notify a client about the socket
2071 * being ready to queue more data. "buf" will be
2072 * NULL and "size" zero if the socket was closed for
2073 * writing in the meantime.
2075 * @param cls closure
2076 * @param size number of bytes available in buf
2077 * @param buf where the callee should write the message
2078 * @return number of bytes written to buf
2081 send_core_create_path (void *cls, size_t size, void *buf)
2083 struct MeshPathInfo *info = cls;
2084 struct GNUNET_MESH_ManipulatePath *msg;
2085 struct GNUNET_PeerIdentity *peer_ptr;
2086 struct MeshPeerInfo *peer = info->peer;
2087 struct MeshTunnel *t = info->t;
2088 struct MeshPeerPath *p = info->path;
2092 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2093 "MESH: CREATE PATH sending...\n");
2095 sizeof (struct GNUNET_MESH_ManipulatePath) +
2096 p->length * sizeof (struct GNUNET_PeerIdentity);
2098 if (size < size_needed || NULL == buf)
2100 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2104 info->peer->core_transmit[info->pos] =
2105 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2106 GNUNET_TIME_UNIT_FOREVER_REL,
2107 path_get_first_hop (t->tree, peer->id),
2109 &send_core_create_path,
2113 info->peer->core_transmit[info->pos] = NULL;
2116 struct GNUNET_PeerIdentity id;
2118 GNUNET_PEER_resolve (peer->id, &id);
2119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2120 "MESH: setting core_transmit %s [%u] to NULL\n",
2125 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2126 msg->header.size = htons (size_needed);
2127 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2128 msg->tid = ntohl (t->id.tid);
2130 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2131 for (i = 0; i < p->length; i++)
2133 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2140 "MESH: CREATE PATH (%u bytes long) sent!\n",
2147 * Function called to notify a client about the socket
2148 * being ready to queue more data. "buf" will be
2149 * NULL and "size" zero if the socket was closed for
2150 * writing in the meantime.
2152 * @param cls closure (data itself)
2153 * @param size number of bytes available in buf
2154 * @param buf where the callee should write the message
2156 * @return number of bytes written to buf
2159 send_core_data_multicast (void *cls, size_t size, void *buf)
2161 struct MeshDataDescriptor *info = cls;
2164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2165 GNUNET_assert (NULL != info);
2166 GNUNET_assert (NULL != info->peer);
2167 total_size = info->size;
2168 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2170 if (total_size > size)
2173 struct GNUNET_PeerIdentity id;
2175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2176 "MESH: Multicast: retransmitting... (%u/%u)\n",
2178 GNUNET_PEER_resolve(info->peer->id, &id);
2179 info->peer->core_transmit[info->handler_n] =
2180 GNUNET_CORE_notify_transmit_ready (core_handle,
2183 GNUNET_TIME_UNIT_FOREVER_REL,
2186 &send_core_data_multicast,
2190 info->peer->core_transmit[info->handler_n] = NULL;
2191 info->peer->infos[info->handler_n] = NULL;
2192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2193 memcpy (buf, info->data, total_size);
2196 struct GNUNET_MESH_Multicast *mc;
2197 struct GNUNET_MessageHeader *mh;
2200 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2202 mc = (struct GNUNET_MESH_Multicast *) mh;
2203 mh = (struct GNUNET_MessageHeader *) &mc[1];
2204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2205 "MESH: multicast, payload type %u\n",
2207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2208 "MESH: multicast, payload size %u\n",
2213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2219 if (0 == --(*info->copies))
2221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
2222 if (NULL != info->client)
2224 if (GNUNET_SCHEDULER_NO_TASK != info->timeout_task)
2226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2227 "MESH: cancelling client timeout (%u)...\n",
2228 info->timeout_task);
2229 GNUNET_SCHEDULER_cancel(info->timeout_task);
2230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
2231 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
2234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing memory...\n");
2235 GNUNET_free (info->data);
2236 GNUNET_free (info->copies);
2238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2246 * Function called to notify a client about the socket
2247 * being ready to queue more data. "buf" will be
2248 * NULL and "size" zero if the socket was closed for
2249 * writing in the meantime.
2251 * @param cls closure (MeshDataDescriptor)
2252 * @param size number of bytes available in buf
2253 * @param buf where the callee should write the message
2254 * @return number of bytes written to buf
2257 send_core_path_ack (void *cls, size_t size, void *buf)
2259 struct MeshDataDescriptor *info = cls;
2260 struct GNUNET_MESH_PathACK *msg = buf;
2262 GNUNET_assert (NULL != info);
2265 info->peer->core_transmit[info->handler_n] = NULL;
2267 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2272 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2273 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2274 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2275 msg->tid = htonl (info->origin->tid);
2276 msg->peer_id = my_full_id;
2278 /* TODO add signature */
2280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2281 return sizeof (struct GNUNET_MESH_PathACK);
2285 /******************************************************************************/
2286 /******************** MESH NETWORK HANDLERS **************************/
2287 /******************************************************************************/
2291 * Core handler for path creation
2293 * @param cls closure
2294 * @param message message
2295 * @param peer peer identity this notification is about
2296 * @param atsi performance data
2297 * @param atsi_count number of records in 'atsi'
2299 * @return GNUNET_OK to keep the connection open,
2300 * GNUNET_SYSERR to close it (signal serious error)
2303 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2304 const struct GNUNET_MessageHeader *message,
2305 const struct GNUNET_ATS_Information *atsi,
2306 unsigned int atsi_count)
2308 unsigned int own_pos;
2311 MESH_TunnelNumber tid;
2312 struct GNUNET_MESH_ManipulatePath *msg;
2313 struct GNUNET_PeerIdentity *pi;
2314 GNUNET_HashCode hash;
2315 struct MeshPeerPath *path;
2316 struct MeshPeerInfo *dest_peer_info;
2317 struct MeshPeerInfo *orig_peer_info;
2318 struct MeshTunnel *t;
2320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2321 "MESH: Received a path create msg [%s]\n",
2322 GNUNET_i2s(&my_full_id));
2323 size = ntohs (message->size);
2324 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2326 GNUNET_break_op (0);
2330 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2331 if (size % sizeof (struct GNUNET_PeerIdentity))
2333 GNUNET_break_op (0);
2336 size /= sizeof (struct GNUNET_PeerIdentity);
2339 GNUNET_break_op (0);
2342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2343 "MESH: path has %u hops.\n",
2345 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2347 tid = ntohl (msg->tid);
2348 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2349 t = tunnel_get (pi, tid);
2350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2351 "MESH: path is for tunnel %s [%X].\n",
2356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2357 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2358 t->id.oid = GNUNET_PEER_intern (pi);
2360 t->local_tid = next_local_tid++;
2361 /* FIXME test if taken */
2362 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2363 t->tree = tree_new(t, t->id.oid);
2365 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2367 GNUNET_CONTAINER_multihashmap_put (
2371 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2377 tunnel_reset_timeout (t);
2378 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2380 GNUNET_CONTAINER_multihashmap_put (
2384 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2392 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2393 if (NULL == dest_peer_info)
2395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2396 "MESH: Creating PeerInfo for destination.\n");
2397 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2398 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2399 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2401 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2403 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2404 if (NULL == orig_peer_info)
2406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2407 "MESH: Creating PeerInfo for origin.\n");
2408 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2409 orig_peer_info->id = GNUNET_PEER_intern (pi);
2410 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2411 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2414 path = path_new (size);
2416 for (i = 0; i < size; i++)
2418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2419 "MESH: ... adding %s\n",
2420 GNUNET_i2s(&pi[i]));
2421 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2422 if (path->peers[i] == myid)
2425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2426 "MESH: Own position: %u\n", own_pos);
2429 /* cannot be self, must be 'not found' */
2430 /* create path: self not found in path through self */
2431 GNUNET_break_op (0);
2432 path_destroy (path);
2433 /* FIXME error. destroy tunnel? leave for timeout? */
2436 tunnel_add_path (t, path, own_pos);
2437 if (own_pos == size - 1)
2439 /* It is for us! Send ack. */
2440 struct GNUNET_MESH_TunnelNotification cmsg;
2441 struct MeshDataDescriptor *info;
2444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2445 "MESH: It's for us!\n");
2446 path_add_to_origin (orig_peer_info, path);
2447 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2448 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2450 &my_full_id.hashPubKey,
2451 peer_info_get(&my_full_id),
2452 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2453 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2454 info->origin = &t->id;
2455 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2456 GNUNET_assert (NULL != info->peer);
2457 j = peer_info_transmit_slot(info->peer);
2458 info->handler_n = j;
2459 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2460 info->peer->infos[j] = info;
2461 info->peer->core_transmit[j] =
2462 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2463 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2464 sizeof (struct GNUNET_MESH_PathACK),
2465 &send_core_path_ack, info);
2466 cmsg.header.size = htons(sizeof(cmsg));
2467 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2468 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2469 cmsg.tunnel_id = htonl(t->local_tid);
2470 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2474 struct MeshPeerPath *path2;
2476 /* It's for somebody else! Retransmit. */
2477 path2 = path_duplicate(path);
2478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2479 "MESH: Retransmitting.\n");
2480 path_add_to_peer(dest_peer_info, path);
2481 path = path_duplicate(path2);
2482 path_add_to_origin(orig_peer_info, path2);
2483 send_create_path(dest_peer_info, path, t);
2490 * Core handler for path destruction
2492 * @param cls closure
2493 * @param message message
2494 * @param peer peer identity this notification is about
2495 * @param atsi performance data
2496 * @param atsi_count number of records in 'atsi'
2498 * @return GNUNET_OK to keep the connection open,
2499 * GNUNET_SYSERR to close it (signal serious error)
2502 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2503 const struct GNUNET_MessageHeader *message,
2504 const struct GNUNET_ATS_Information *atsi,
2505 unsigned int atsi_count)
2507 struct GNUNET_MESH_ManipulatePath *msg;
2508 struct GNUNET_PeerIdentity *pi;
2509 struct MeshPeerPath *path;
2510 struct MeshTunnel *t;
2511 unsigned int own_pos;
2515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2516 "MESH: Received a PATH DESTROY msg from %s\n",
2518 size = ntohs (message->size);
2519 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2521 GNUNET_break_op (0);
2525 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2526 if (size % sizeof (struct GNUNET_PeerIdentity))
2528 GNUNET_break_op (0);
2531 size /= sizeof (struct GNUNET_PeerIdentity);
2534 GNUNET_break_op (0);
2537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2538 "MESH: path has %u hops.\n",
2541 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2542 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2543 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2544 "MESH: path is for tunnel %s [%X].\n",
2547 t = tunnel_get (pi, ntohl (msg->tid));
2550 /* TODO notify back: we don't know this tunnel */
2551 GNUNET_break_op (0);
2554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2555 path = path_new (size);
2557 for (i = 0; i < size; i++)
2559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2560 "MESH: ... adding %s\n",
2561 GNUNET_i2s(&pi[i]));
2562 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2563 if (path->peers[i] == myid)
2566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2567 "MESH: Own position: %u\n", own_pos);
2568 if (own_pos < path->length - 1)
2569 send_message (message, &pi[own_pos + 1]);
2570 tunnel_delete_peer (t, path->peers[path->length - 1]);
2576 * Core handler for notifications of broken paths
2578 * @param cls closure
2579 * @param message message
2580 * @param peer peer identity this notification is about
2581 * @param atsi performance data
2582 * @param atsi_count number of records in 'atsi'
2584 * @return GNUNET_OK to keep the connection open,
2585 * GNUNET_SYSERR to close it (signal serious error)
2588 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2589 const struct GNUNET_MessageHeader *message,
2590 const struct GNUNET_ATS_Information *atsi,
2591 unsigned int atsi_count)
2593 struct GNUNET_MESH_PathBroken *msg;
2594 struct MeshTunnel *t;
2596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2597 "MESH: Received a PATH BROKEN msg from %s\n",
2599 msg = (struct GNUNET_MESH_PathBroken *) message;
2600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2601 "MESH: regarding %s\n",
2602 GNUNET_i2s(&msg->peer1));
2603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2604 "MESH: regarding %s\n",
2605 GNUNET_i2s(&msg->peer2));
2606 t = tunnel_get(&msg->oid, ntohl (msg->tid));
2609 GNUNET_break_op (0);
2612 tunnel_notify_connection_broken(t,
2613 GNUNET_PEER_search(&msg->peer1),
2614 GNUNET_PEER_search(&msg->peer2));
2621 * Core handler for tunnel destruction
2623 * @param cls closure
2624 * @param message message
2625 * @param peer peer identity this notification is about
2626 * @param atsi performance data
2627 * @param atsi_count number of records in 'atsi'
2629 * @return GNUNET_OK to keep the connection open,
2630 * GNUNET_SYSERR to close it (signal serious error)
2633 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2634 const struct GNUNET_MessageHeader *message,
2635 const struct GNUNET_ATS_Information *atsi,
2636 unsigned int atsi_count)
2638 struct GNUNET_MESH_TunnelDestroy *msg;
2639 struct MeshTunnel *t;
2641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2642 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2644 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2646 "MESH: for tunnel %s [%u]\n",
2647 GNUNET_i2s (&msg->oid),
2649 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2652 /* TODO notify back: we don't know this tunnel */
2653 GNUNET_break_op (0);
2656 if (t->id.oid == myid)
2658 GNUNET_break_op (0);
2661 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2663 /* Tunnel was incoming, notify clients */
2664 send_clients_tunnel_destroy (t);
2666 tunnel_send_destroy (t);
2673 * Core handler for mesh network traffic going from the origin to a peer
2675 * @param cls closure
2676 * @param peer peer identity this notification is about
2677 * @param message message
2678 * @param atsi performance data
2679 * @param atsi_count number of records in 'atsi'
2680 * @return GNUNET_OK to keep the connection open,
2681 * GNUNET_SYSERR to close it (signal serious error)
2684 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2685 const struct GNUNET_MessageHeader *message,
2686 const struct GNUNET_ATS_Information *atsi,
2687 unsigned int atsi_count)
2689 struct GNUNET_MESH_Unicast *msg;
2690 struct MeshTunnel *t;
2694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2695 "MESH: got a unicast packet from %s\n",
2697 size = ntohs (message->size);
2699 sizeof (struct GNUNET_MESH_Unicast) +
2700 sizeof (struct GNUNET_MessageHeader))
2705 msg = (struct GNUNET_MESH_Unicast *) message;
2706 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2707 "MESH: of type %u\n",
2708 ntohs (msg[1].header.type));
2709 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2712 /* TODO notify back: we don't know this tunnel */
2713 GNUNET_break_op (0);
2716 tunnel_reset_timeout (t);
2717 pid = GNUNET_PEER_search(&msg->destination);
2720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2721 "MESH: it's for us! sending to clients...\n");
2722 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2725 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2726 "MESH: not for us, retransmitting...\n");
2727 send_message (message, path_get_first_hop(t->tree, pid));
2733 * Core handler for mesh network traffic going from the origin to all peers
2735 * @param cls closure
2736 * @param message message
2737 * @param peer peer identity this notification is about
2738 * @param atsi performance data
2739 * @param atsi_count number of records in 'atsi'
2740 * @return GNUNET_OK to keep the connection open,
2741 * GNUNET_SYSERR to close it (signal serious error)
2743 * TODO: Check who we got this from, to validate route.
2746 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2747 const struct GNUNET_MessageHeader *message,
2748 const struct GNUNET_ATS_Information *atsi,
2749 unsigned int atsi_count)
2751 struct GNUNET_MESH_Multicast *msg;
2752 struct MeshTunnel *t;
2755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2756 "MESH: got a multicast packet from %s\n",
2758 size = ntohs (message->size);
2759 if (sizeof (struct GNUNET_MESH_Multicast) +
2760 sizeof (struct GNUNET_MessageHeader) > size)
2762 GNUNET_break_op (0);
2765 msg = (struct GNUNET_MESH_Multicast *) message;
2766 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2770 /* TODO notify that we dont know that tunnel */
2771 GNUNET_break_op (0);
2774 tunnel_reset_timeout (t);
2776 /* Transmit to locally interested clients */
2777 if (NULL != t->peers &&
2778 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2780 send_subscribed_clients (message, &msg[1].header);
2782 tunnel_send_multicast(t, message);
2788 * Core handler for mesh network traffic toward the owner of a tunnel
2790 * @param cls closure
2791 * @param message message
2792 * @param peer peer identity this notification is about
2793 * @param atsi performance data
2794 * @param atsi_count number of records in 'atsi'
2796 * @return GNUNET_OK to keep the connection open,
2797 * GNUNET_SYSERR to close it (signal serious error)
2800 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2801 const struct GNUNET_MessageHeader *message,
2802 const struct GNUNET_ATS_Information *atsi,
2803 unsigned int atsi_count)
2805 struct GNUNET_MESH_ToOrigin *msg;
2806 struct GNUNET_PeerIdentity id;
2807 struct MeshPeerInfo *peer_info;
2808 struct MeshTunnel *t;
2811 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2812 "MESH: got a ToOrigin packet from %s\n",
2814 size = ntohs (message->size);
2815 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2816 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2818 GNUNET_break_op (0);
2821 msg = (struct GNUNET_MESH_ToOrigin *) message;
2822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2823 "MESH: of type %u\n",
2824 ntohs (msg[1].header.type));
2825 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2829 /* TODO notify that we dont know this tunnel (whom)? */
2830 GNUNET_break_op (0);
2834 if (t->id.oid == myid)
2837 struct GNUNET_MESH_ToOrigin *copy;
2839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2840 "MESH: it's for us! sending to clients...\n");
2841 if (NULL == t->client)
2843 /* got data packet for ownerless tunnel */
2844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2845 "MESH: no clients!\n");
2846 GNUNET_break_op (0);
2849 /* TODO signature verification */
2850 memcpy (cbuf, message, size);
2851 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2852 copy->tid = htonl (t->local_tid);
2853 GNUNET_SERVER_notification_context_unicast (nc,
2859 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2860 "MESH: not for us, retransmitting...\n");
2862 peer_info = peer_info_get (&msg->oid);
2863 if (NULL == peer_info)
2865 /* unknown origin of tunnel */
2869 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2870 send_message (message, &id);
2877 * Core handler for path ACKs
2879 * @param cls closure
2880 * @param message message
2881 * @param peer peer identity this notification is about
2882 * @param atsi performance data
2883 * @param atsi_count number of records in 'atsi'
2885 * @return GNUNET_OK to keep the connection open,
2886 * GNUNET_SYSERR to close it (signal serious error)
2889 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2890 const struct GNUNET_MessageHeader *message,
2891 const struct GNUNET_ATS_Information *atsi,
2892 unsigned int atsi_count)
2894 struct GNUNET_MESH_PathACK *msg;
2895 struct GNUNET_PeerIdentity id;
2896 struct MeshTunnelTreeNode *n;
2897 struct MeshPeerInfo *peer_info;
2898 struct MeshTunnel *t;
2900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2901 "MESH: Received a path ACK msg [%s]\n",
2902 GNUNET_i2s(&my_full_id));
2903 msg = (struct GNUNET_MESH_PathACK *) message;
2904 t = tunnel_get (&msg->oid, msg->tid);
2907 /* TODO notify that we don't know the tunnel */
2911 /* Message for us? */
2912 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2915 if (NULL == t->client)
2917 GNUNET_break_op (0);
2920 if (NULL != t->dht_get_type)
2922 GNUNET_DHT_get_stop (t->dht_get_type);
2923 t->dht_get_type = NULL;
2925 peer_info = peer_info_get (&msg->peer_id);
2926 n = tree_find_peer(t->tree->root, peer_info->id);
2929 GNUNET_break_op (0);
2932 n->status = MESH_PEER_READY;
2933 send_client_peer_connected(t, peer_info->id);
2937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2938 "MESH: not for us, retransmitting...\n");
2939 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2940 peer_info = peer_info_get (&msg->oid);
2941 if (NULL == peer_info)
2943 /* If we know the tunnel, we should DEFINITELY know the peer */
2947 send_message (message, &id);
2953 * Functions to handle messages from core
2955 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2956 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2957 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
2958 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
2959 sizeof (struct GNUNET_MESH_PathBroken)},
2960 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
2961 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2962 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2963 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2964 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2965 sizeof (struct GNUNET_MESH_PathACK)},
2971 /******************************************************************************/
2972 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2973 /******************************************************************************/
2976 * deregister_app: iterator for removing each application registered by a client
2978 * @param cls closure
2979 * @param key the hash of the application id (used to access the hashmap)
2980 * @param value the value stored at the key (client)
2982 * @return GNUNET_OK on success
2985 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2987 GNUNET_break (GNUNET_YES ==
2988 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
2994 * notify_client_connection_failure: notify a client that the connection to the
2995 * requested remote peer is not possible (for instance, no route found)
2996 * Function called when the socket is ready to queue more data. "buf" will be
2997 * NULL and "size" zero if the socket was closed for writing in the meantime.
2999 * @param cls closure
3000 * @param size number of bytes available in buf
3001 * @param buf where the callee should write the message
3002 * @return number of bytes written to buf
3005 notify_client_connection_failure (void *cls, size_t size, void *buf)
3008 struct MeshPeerInfo *peer_info;
3009 struct GNUNET_MESH_PeerControl *msg;
3010 struct GNUNET_PeerIdentity id;
3012 if (0 == size && NULL == buf)
3014 // TODO retry? cancel?
3018 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3019 peer_info = (struct MeshPeerInfo *) cls;
3020 msg = (struct GNUNET_MESH_PeerControl *) buf;
3021 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3022 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3023 // msg->tunnel_id = htonl(peer_info->t->tid);
3024 GNUNET_PEER_resolve (peer_info->id, &id);
3025 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3033 * Send keepalive packets for a peer
3035 * @param cls Closure (tunnel for which to send the keepalive).
3036 * @param tc Notification context.
3038 * TODO: implement explicit multicast keepalive?
3041 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3043 struct MeshTunnel *t = cls;
3044 struct GNUNET_MessageHeader *payload;
3045 struct GNUNET_MESH_Multicast *msg;
3046 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
3047 sizeof(struct GNUNET_MessageHeader);
3050 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3054 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3057 "MESH: sending keepalive for tunnel %d\n",
3060 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3061 msg->header.size = htons (size);
3062 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3063 msg->oid = my_full_id;
3064 msg->tid = htonl(t->id.tid);
3065 payload = (struct GNUNET_MessageHeader *) &msg[1];
3066 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
3067 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3068 tunnel_send_multicast (t, &msg->header);
3070 t->path_refresh_task =
3071 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3077 * Function to process paths received for a new peer addition. The recorded
3078 * paths form the initial tunnel, which can be optimized later.
3079 * Called on each result obtained for the DHT search.
3081 * @param cls closure
3082 * @param exp when will this value expire
3083 * @param key key of the result
3084 * @param type type of the result
3085 * @param size number of bytes in data
3086 * @param data pointer to the result data
3088 * TODO: re-issue the request after certain time? cancel after X results?
3091 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3092 const GNUNET_HashCode * key,
3093 const struct GNUNET_PeerIdentity *get_path,
3094 unsigned int get_path_length,
3095 const struct GNUNET_PeerIdentity *put_path,
3096 unsigned int put_path_length,
3097 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3099 struct MeshPathInfo *path_info = cls;
3100 struct MeshPeerPath *p;
3101 struct GNUNET_PeerIdentity pi;
3104 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3105 "MESH: Got results from DHT!\n");
3106 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3107 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3109 GNUNET_h2s_full(&pi.hashPubKey));
3110 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3111 // path_info->peer->dhtget = NULL;
3113 p = path_build_from_dht (get_path, get_path_length,
3114 put_path, put_path_length);
3115 path_add_to_peer (path_info->peer, p);
3116 for (i = 0; i < path_info->peer->ntunnels; i++)
3118 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3119 peer_info_connect(path_info->peer, path_info->t);
3121 GNUNET_free (path_info);
3128 * Function to process paths received for a new peer addition. The recorded
3129 * paths form the initial tunnel, which can be optimized later.
3130 * Called on each result obtained for the DHT search.
3132 * @param cls closure
3133 * @param exp when will this value expire
3134 * @param key key of the result
3135 * @param type type of the result
3136 * @param size number of bytes in data
3137 * @param data pointer to the result data
3140 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3141 const GNUNET_HashCode * key,
3142 const struct GNUNET_PeerIdentity *get_path,
3143 unsigned int get_path_length,
3144 const struct GNUNET_PeerIdentity *put_path,
3145 unsigned int put_path_length,
3146 enum GNUNET_BLOCK_Type type, size_t size,
3149 const struct GNUNET_PeerIdentity *pi = data;
3150 struct MeshTunnel *t = cls;
3151 struct MeshPeerInfo *peer_info;
3152 struct MeshPeerPath *p;
3154 if (size != sizeof (struct GNUNET_PeerIdentity))
3156 GNUNET_break_op (0);
3159 GNUNET_assert (NULL != t->client);
3160 peer_info = peer_info_get (pi);
3161 (void) GNUNET_CONTAINER_multihashmap_put (
3165 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3167 p = path_build_from_dht (get_path, get_path_length,
3168 put_path, put_path_length);
3169 path_add_to_peer (peer_info, p);
3170 tunnel_add_peer(t, peer_info);
3171 peer_info_connect (peer_info, t);
3175 /******************************************************************************/
3176 /********************* MESH LOCAL HANDLES **************************/
3177 /******************************************************************************/
3181 * Handler for client disconnection
3183 * @param cls closure
3184 * @param client identification of the client; NULL
3185 * for the last call when the server is destroyed
3188 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3190 struct MeshClient *c;
3191 struct MeshClient *next;
3193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3195 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3199 if (c->handle != client && NULL != client)
3201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3206 if (NULL != c->tunnels)
3208 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3209 &tunnel_destroy_iterator,
3211 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3214 /* deregister clients applications */
3215 if (NULL != c->apps)
3217 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3218 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3220 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3221 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3223 GNUNET_SCHEDULER_cancel (announce_applications_task);
3224 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3226 if (NULL != c->types)
3227 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3228 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3240 * Handler for new clients
3242 * @param cls closure
3243 * @param client identification of the client
3244 * @param message the actual message, which includes messages the client wants
3247 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3248 const struct GNUNET_MessageHeader *message)
3250 struct GNUNET_MESH_ClientConnect *cc_msg;
3251 struct MeshClient *c;
3252 GNUNET_MESH_ApplicationType *a;
3259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3260 /* Check data sanity */
3261 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3262 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3263 ntypes = ntohs (cc_msg->types);
3264 napps = ntohs (cc_msg->applications);
3266 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3269 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3273 /* Create new client structure */
3274 c = GNUNET_malloc (sizeof (struct MeshClient));
3276 c->id = next_client_id++;
3279 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3282 GNUNET_MESH_ApplicationType at;
3285 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3286 for (i = 0; i < napps; i++)
3289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3290 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3291 /* store in clients hashmap */
3292 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3293 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3294 /* store in global hashmap, for announcements */
3295 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3296 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3298 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3299 announce_applications_task =
3300 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3308 t = (uint16_t *) & a[napps];
3309 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3310 for (i = 0; i < ntypes; i++)
3313 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3315 /* store in clients hashmap */
3316 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3317 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3318 /* store in global hashmap */
3319 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3320 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3324 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3326 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3327 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3328 GNUNET_SERVER_notification_context_add (nc, client);
3330 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3338 * Handler for requests of new tunnels
3340 * @param cls closure
3341 * @param client identification of the client
3342 * @param message the actual message
3345 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3346 const struct GNUNET_MessageHeader *message)
3348 struct GNUNET_MESH_TunnelMessage *t_msg;
3349 struct MeshTunnel *t;
3350 struct MeshClient *c;
3351 GNUNET_HashCode hash;
3353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3355 /* Sanity check for client registration */
3356 if (NULL == (c = client_get (client)))
3359 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3366 /* Message sanity check */
3367 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3370 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3374 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3375 /* Sanity check for tunnel numbering */
3376 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3379 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3382 /* Sanity check for duplicate tunnel IDs */
3383 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3386 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3390 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
3392 while (NULL != tunnel_get_by_pi (myid, next_tid))
3393 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3394 t->id.tid = next_tid++;
3396 t->local_tid = ntohl (t_msg->tunnel_id);
3398 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3400 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3402 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
3403 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3406 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3410 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3412 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3413 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3416 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3419 t->tree = tree_new (t, myid);
3420 t->tree->refresh = REFRESH_PATH_TIME;
3421 t->tree->root->status = MESH_PEER_READY;
3422 t->tree->me = t->tree->root;
3424 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3430 * Handler for requests of deleting tunnels
3432 * @param cls closure
3433 * @param client identification of the client
3434 * @param message the actual message
3437 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3438 const struct GNUNET_MessageHeader *message)
3440 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3441 struct MeshClient *c;
3442 struct MeshTunnel *t;
3443 MESH_TunnelNumber tid;
3444 GNUNET_HashCode hash;
3446 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3447 "MESH: Got a DESTROY TUNNEL from client!\n");
3449 /* Sanity check for client registration */
3450 if (NULL == (c = client_get (client)))
3453 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3456 /* Message sanity check */
3457 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3460 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3466 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3468 /* Retrieve tunnel */
3469 tid = ntohl (tunnel_msg->tunnel_id);
3471 /* Remove from local id hashmap */
3472 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3473 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3474 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
3477 tunnel_send_destroy (t);
3479 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3485 * Handler for connection requests to new peers
3487 * @param cls closure
3488 * @param client identification of the client
3489 * @param message the actual message (PeerControl)
3492 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3493 const struct GNUNET_MessageHeader *message)
3495 struct GNUNET_MESH_PeerControl *peer_msg;
3496 struct MeshPeerInfo *peer_info;
3497 struct MeshClient *c;
3498 struct MeshTunnel *t;
3499 MESH_TunnelNumber tid;
3501 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3502 /* Sanity check for client registration */
3503 if (NULL == (c = client_get (client)))
3506 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3510 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3511 /* Sanity check for message size */
3512 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3515 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3519 /* Tunnel exists? */
3520 tid = ntohl (peer_msg->tunnel_id);
3521 t = tunnel_get_by_local_id (c, tid);
3525 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3529 /* Does client own tunnel? */
3530 if (t->client->handle != client)
3533 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3536 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3537 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
3538 peer_info = peer_info_get (&peer_msg->peer);
3540 tunnel_add_peer(t, peer_info);
3541 peer_info_connect(peer_info, t);
3543 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3549 * Handler for disconnection requests of peers in a tunnel
3551 * @param cls closure
3552 * @param client identification of the client
3553 * @param message the actual message (PeerControl)
3556 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3557 const struct GNUNET_MessageHeader *message)
3559 struct GNUNET_MESH_PeerControl *peer_msg;
3560 struct MeshPeerInfo *peer_info;
3561 struct MeshClient *c;
3562 struct MeshTunnel *t;
3563 MESH_TunnelNumber tid;
3565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3566 /* Sanity check for client registration */
3567 if (NULL == (c = client_get (client)))
3570 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3573 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3574 /* Sanity check for message size */
3575 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3578 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3582 /* Tunnel exists? */
3583 tid = ntohl (peer_msg->tunnel_id);
3584 t = tunnel_get_by_local_id (c, tid);
3588 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3593 /* Does client own tunnel? */
3594 if (t->client->handle != client)
3597 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3602 "MESH: for peer %s\n",
3603 GNUNET_i2s(&peer_msg->peer));
3604 /* Is the peer in the tunnel? */
3605 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3606 &peer_msg->peer.hashPubKey);
3607 if (NULL == peer_info)
3610 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3614 /* Ok, delete peer from tunnel */
3615 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3616 &peer_msg->peer.hashPubKey);
3618 send_destroy_path (t, peer_info->id);
3619 tunnel_delete_peer(t, peer_info->id);
3620 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3626 * Handler for connection requests to new peers by type
3628 * @param cls closure
3629 * @param client identification of the client
3630 * @param message the actual message (ConnectPeerByType)
3633 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3634 const struct GNUNET_MessageHeader *message)
3636 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3637 struct MeshClient *c;
3638 struct MeshTunnel *t;
3639 GNUNET_HashCode hash;
3640 MESH_TunnelNumber tid;
3642 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3643 /* Sanity check for client registration */
3644 if (NULL == (c = client_get (client)))
3647 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3651 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3652 /* Sanity check for message size */
3653 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3654 ntohs (connect_msg->header.size))
3657 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3661 /* Tunnel exists? */
3662 tid = ntohl (connect_msg->tunnel_id);
3663 t = tunnel_get_by_local_id (c, tid);
3667 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3671 /* Does client own tunnel? */
3672 if (t->client->handle != client)
3675 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3679 /* Do WE have the service? */
3680 t->type = ntohl (connect_msg->type);
3681 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3682 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3683 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3686 /* Yes! Fast forward, add ourselves to the tunnel and send the
3687 * good news to the client
3689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3690 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3691 peer_info_get (&my_full_id),
3692 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3695 send_client_peer_connected(t, myid);
3696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3697 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3700 /* Ok, lets find a peer offering the service */
3701 if (NULL != t->dht_get_type)
3703 GNUNET_DHT_get_stop (t->dht_get_type);
3705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3706 GNUNET_h2s_full (&hash));
3708 GNUNET_DHT_get_start (dht_handle,
3709 GNUNET_TIME_UNIT_FOREVER_REL,
3710 GNUNET_BLOCK_TYPE_TEST,
3713 GNUNET_DHT_RO_RECORD_ROUTE |
3714 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3716 &dht_get_type_handler, t);
3718 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3724 * Handler for client traffic directed to one peer
3726 * @param cls closure
3727 * @param client identification of the client
3728 * @param message the actual message
3731 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3732 const struct GNUNET_MessageHeader *message)
3734 struct MeshClient *c;
3735 struct MeshTunnel *t;
3736 struct MeshPeerInfo *pi;
3737 struct GNUNET_MESH_Unicast *data_msg;
3738 MESH_TunnelNumber tid;
3741 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3742 "MESH: Got a unicast request from a client!\n");
3744 /* Sanity check for client registration */
3745 if (NULL == (c = client_get (client)))
3748 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3751 data_msg = (struct GNUNET_MESH_Unicast *) message;
3752 /* Sanity check for message size */
3753 size = ntohs (message->size);
3754 if (sizeof (struct GNUNET_MESH_Unicast) +
3755 sizeof (struct GNUNET_MessageHeader) > size)
3758 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3762 /* Tunnel exists? */
3763 tid = ntohl (data_msg->tid);
3764 t = tunnel_get_by_local_id (c, tid);
3768 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3772 /* Is it a local tunnel? Then, does client own the tunnel? */
3773 if (NULL != t->client &&
3774 NULL != t->client->handle &&
3775 t->client->handle != client)
3778 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3782 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3783 &data_msg->destination.hashPubKey);
3784 /* Is the selected peer in the tunnel? */
3788 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3792 /* Ok, everything is correct, send the message
3793 * (pretend we got it from a mesh peer)
3796 char buf[ntohs (message->size)];
3797 struct GNUNET_MESH_Unicast *copy;
3799 /* Work around const limitation */
3800 copy = (struct GNUNET_MESH_Unicast *) buf;
3801 memcpy (buf, data_msg, size);
3802 copy->oid = my_full_id;
3803 copy->tid = htonl (t->id.tid);
3804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3805 "MESH: calling generic handler...\n");
3806 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3808 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3814 * Handler for client traffic directed to the origin
3816 * @param cls closure
3817 * @param client identification of the client
3818 * @param message the actual message
3821 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3822 const struct GNUNET_MessageHeader *message)
3824 struct GNUNET_MESH_ToOrigin *data_msg;
3825 struct GNUNET_PeerIdentity id;
3826 struct MeshClient *c;
3827 struct MeshTunnel *t;
3828 MESH_TunnelNumber tid;
3831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3832 "MESH: Got a ToOrigin request from a client!\n");
3834 /* Sanity check for client registration */
3835 if (NULL == (c = client_get (client)))
3838 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3841 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3842 /* Sanity check for message size */
3843 size = ntohs (message->size);
3844 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3845 sizeof (struct GNUNET_MessageHeader) > size)
3848 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3852 /* Tunnel exists? */
3853 tid = ntohl (data_msg->tid);
3854 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3857 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3860 t = tunnel_get_by_local_id (c, tid);
3864 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3868 /* It shouldn't be a local tunnel. */
3869 if (NULL != t->client)
3872 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3875 GNUNET_PEER_resolve(t->id.oid, &id);
3877 /* Ok, everything is correct, send the message
3878 * (pretend we got it from a mesh peer)
3881 char buf[ntohs (message->size)];
3882 struct GNUNET_MESH_ToOrigin *copy;
3884 /* Work around const limitation */
3885 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3886 memcpy (buf, data_msg, size);
3888 copy->tid = htonl (t->id.tid);
3889 copy->sender = my_full_id;
3890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3891 "MESH: calling generic handler...\n");
3892 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3894 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3900 * Handler for client traffic directed to all peers in a tunnel
3902 * @param cls closure
3903 * @param client identification of the client
3904 * @param message the actual message
3907 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3908 const struct GNUNET_MessageHeader *message)
3910 struct MeshClient *c;
3911 struct MeshTunnel *t;
3912 struct GNUNET_MESH_Multicast *data_msg;
3913 MESH_TunnelNumber tid;
3915 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3916 "MESH: Got a multicast request from a client!\n");
3918 /* Sanity check for client registration */
3919 if (NULL == (c = client_get (client)))
3922 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3925 data_msg = (struct GNUNET_MESH_Multicast *) message;
3926 /* Sanity check for message size */
3927 if (sizeof (struct GNUNET_MESH_Multicast) +
3928 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
3931 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3935 /* Tunnel exists? */
3936 tid = ntohl (data_msg->tid);
3937 t = tunnel_get_by_local_id (c, tid);
3941 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3945 /* Does client own tunnel? */
3946 if (t->client->handle != client)
3949 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3954 char buf[ntohs(message->size)];
3955 struct GNUNET_MESH_Multicast *copy;
3957 copy = (struct GNUNET_MESH_Multicast *)buf;
3958 memcpy(buf, message, ntohs(message->size));
3959 copy->oid = my_full_id;
3960 copy->tid = htonl(t->id.tid);
3961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3962 "MESH: calling generic handler...\n");
3963 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
3966 /* receive done gets called when last copy is sent to a neighbor */
3971 * Functions to handle messages from clients
3973 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3974 {&handle_local_new_client, NULL,
3975 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3976 {&handle_local_tunnel_create, NULL,
3977 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3978 sizeof (struct GNUNET_MESH_TunnelMessage)},
3979 {&handle_local_tunnel_destroy, NULL,
3980 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3981 sizeof (struct GNUNET_MESH_TunnelMessage)},
3982 {&handle_local_connect_add, NULL,
3983 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3984 sizeof (struct GNUNET_MESH_PeerControl)},
3985 {&handle_local_connect_del, NULL,
3986 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3987 sizeof (struct GNUNET_MESH_PeerControl)},
3988 {&handle_local_connect_by_type, NULL,
3989 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3990 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3991 {&handle_local_unicast, NULL,
3992 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3993 {&handle_local_to_origin, NULL,
3994 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3995 {&handle_local_multicast, NULL,
3996 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4002 * To be called on core init/fail.
4004 * @param cls service closure
4005 * @param server handle to the server for this service
4006 * @param identity the public identity of this peer
4009 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4010 const struct GNUNET_PeerIdentity *identity)
4012 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4013 core_handle = server;
4014 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
4016 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4017 GNUNET_SCHEDULER_shutdown();
4023 * Method called whenever a given peer connects.
4025 * @param cls closure
4026 * @param peer peer identity this notification is about
4027 * @param atsi performance data for the connection
4028 * @param atsi_count number of records in 'atsi'
4031 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4032 const struct GNUNET_ATS_Information *atsi,
4033 unsigned int atsi_count)
4035 struct MeshPeerInfo *peer_info;
4036 struct MeshPeerPath *path;
4038 #if MESH_DEBUG_CONNECTION
4039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4041 GNUNET_h2s(&my_full_id.hashPubKey));
4043 peer_info = peer_info_get (peer);
4044 if (myid == peer_info->id)
4046 #if MESH_DEBUG_CONNECTION
4047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4051 #if MESH_DEBUG_CONNECTION
4054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4055 GNUNET_h2s(&peer->hashPubKey));
4058 path = path_new (2);
4059 path->peers[0] = myid;
4060 path->peers[1] = peer_info->id;
4061 GNUNET_PEER_change_rc(myid, 1);
4062 GNUNET_PEER_change_rc(peer_info->id, 1);
4063 path_add_to_peer (peer_info, path);
4068 * Method called whenever a peer disconnects.
4070 * @param cls closure
4071 * @param peer peer identity this notification is about
4074 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4076 struct MeshPeerInfo *pi;
4079 #if MESH_DEBUG_CONNECTION
4080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4082 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4088 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4090 /* TODO: notify that the transmission failed */
4091 peer_info_cancel_transmission(pi, i);
4093 path_remove_from_peer (pi, pi->id, myid);
4094 #if MESH_DEBUG_CONNECTION
4097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4104 /******************************************************************************/
4105 /************************ MAIN FUNCTIONS ****************************/
4106 /******************************************************************************/
4109 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4111 * @param cls closure
4112 * @param key current key code
4113 * @param value value in the hash map
4114 * @return GNUNET_YES if we should continue to iterate,
4118 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4120 struct MeshTunnel *t = value;
4126 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4128 * @param cls closure
4129 * @param key current key code
4130 * @param value value in the hash map
4131 * @return GNUNET_YES if we should continue to iterate,
4135 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4137 struct MeshPeerInfo *p = value;
4138 peer_info_destroy(p);
4143 * Task run during shutdown.
4149 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4152 /* TODO: destroy tunnels? */
4153 if (core_handle != NULL)
4155 GNUNET_CORE_disconnect (core_handle);
4158 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4159 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4160 if (dht_handle != NULL)
4162 GNUNET_DHT_disconnect (dht_handle);
4167 GNUNET_SERVER_notification_context_destroy (nc);
4170 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4172 GNUNET_SCHEDULER_cancel (announce_id_task);
4173 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4179 * Process mesh requests.
4181 * @param cls closure
4182 * @param server the initialized server
4183 * @param c configuration to use
4186 run (void *cls, struct GNUNET_SERVER_Handle *server,
4187 const struct GNUNET_CONFIGURATION_Handle *c)
4189 struct MeshPeerInfo *peer;
4190 struct MeshPeerPath *p;
4193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4194 server_handle = server;
4195 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4196 CORE_QUEUE_SIZE, /* queue size */
4197 NULL, /* Closure passed to MESH functions */
4198 &core_init, /* Call core_init once connected */
4199 &core_connect, /* Handle connects */
4200 &core_disconnect, /* remove peers on disconnects */
4201 NULL, /* Don't notify about all incoming messages */
4202 GNUNET_NO, /* For header only in notification */
4203 NULL, /* Don't notify about all outbound messages */
4204 GNUNET_NO, /* For header-only out notification */
4205 core_handlers); /* Register these handlers */
4206 if (core_handle == NULL)
4209 GNUNET_SCHEDULER_shutdown ();
4214 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4217 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4219 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4220 GNUNET_SCHEDULER_shutdown ();
4223 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4224 GNUNET_free (keyfile);
4225 if (my_private_key == NULL)
4227 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4228 _("Mesh service could not access hostkey. Exiting.\n"));
4229 GNUNET_SCHEDULER_shutdown ();
4232 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4233 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4234 &my_full_id.hashPubKey);
4235 myid = GNUNET_PEER_intern (&my_full_id);
4237 dht_handle = GNUNET_DHT_connect (c, 64);
4238 if (dht_handle == NULL)
4244 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4246 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4247 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4248 peers = GNUNET_CONTAINER_multihashmap_create (32);
4249 applications = GNUNET_CONTAINER_multihashmap_create (32);
4250 types = GNUNET_CONTAINER_multihashmap_create (32);
4252 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4253 nc = GNUNET_SERVER_notification_context_create (server_handle,
4255 GNUNET_SERVER_disconnect_notify (server_handle,
4256 &handle_local_client_disconnect,
4261 clients_tail = NULL;
4266 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4267 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4269 /* Create a peer_info for the local peer */
4270 peer = peer_info_get(&my_full_id);
4273 path_add_to_peer(peer, p);
4275 /* Scheduled the task to clean up when shutdown is called */
4276 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4283 * The main function for the mesh service.
4285 * @param argc number of arguments from the command line
4286 * @param argv command line arguments
4287 * @return 0 ok, 1 on error
4290 main (int argc, char *const *argv)
4294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4297 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");