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.
10 GNUnet is distributed in the hope that it will be useful, but
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 #define MESH_DEBUG_DHT GNUNET_NO
74 /******************************************************************************/
75 /************************ DATA STRUCTURES ****************************/
76 /******************************************************************************/
78 /** FWD declaration */
82 * Struct containing all info possibly needed to build a package when called
85 struct MeshDataDescriptor
87 /** ID of the tunnel this packet travels in */
88 struct MESH_TunnelID *origin;
93 /** Client that asked for the transmission, if any */
94 struct GNUNET_SERVER_Client *client;
96 /** Who was this message being sent to */
97 struct MeshPeerInfo *peer;
99 /** Ultimate destination of the packet */
100 GNUNET_PEER_Id destination;
102 /** Number of identical messages sent to different hops (multicast) */
103 unsigned int *copies;
105 /** Which handler was used to request the transmission */
106 unsigned int handler_n;
108 /** Size of the data */
111 /** Used to allow a client send more traffic to the service after a
112 * previous packet was tried to be sent to a neighbor and couldn't */
113 GNUNET_SCHEDULER_TaskIdentifier *timeout_task;
118 * Struct containing all information regarding a given peer
128 * Last time we heard from this peer
130 struct GNUNET_TIME_Absolute last_contact;
133 * Number of attempts to reconnect so far
135 int n_reconnect_attempts;
138 * Paths to reach the peer, ordered by ascending hop count
140 struct MeshPeerPath *path_head;
143 * Paths to reach the peer, ordered by ascending hop count
145 struct MeshPeerPath *path_tail;
148 * Handle to stop the DHT search for a path to this peer
150 struct GNUNET_DHT_GetHandle *dhtget;
153 * Closure given to the DHT GET
155 struct MeshPathInfo *dhtgetcls;
158 * Handles to stop queued transmissions for this peer
160 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
163 * Pointer to info stuctures used as cls for queued transmissions
165 void *infos[CORE_QUEUE_SIZE];
168 * Type of message being in each transmission
170 uint16_t types[CORE_QUEUE_SIZE];
173 * Array of tunnels this peer participates in
174 * (most probably a small amount, therefore not a hashmap)
175 * When the path to the peer changes, notify these tunnels to let them
176 * re-adjust their path trees.
178 struct MeshTunnel **tunnels;
181 * Number of tunnels this peers participates in
183 unsigned int ntunnels;
188 * Data scheduled to transmit (to local client or remote peer)
195 struct MeshQueue *next;
196 struct MeshQueue *prev;
199 * Target of the data (NULL if target is client)
201 struct MeshPeerInfo *peer;
204 * Client to send the data to (NULL if target is peer)
206 struct MeshClient *client;
209 * Size of the message to transmit
214 * How old is the data?
216 struct GNUNET_TIME_Absolute timestamp;
221 struct GNUNET_MessageHeader *data;
225 * Globally unique tunnel identification (owner + number)
226 * DO NOT USE OVER THE NETWORK
231 * Node that owns the tunnel
236 * Tunnel number to differentiate all the tunnels owned by the node oid
237 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
239 MESH_TunnelNumber tid;
243 struct MeshClient; /* FWD declaration */
246 * Struct containing all information regarding a tunnel
247 * For an intermediate node the improtant info used will be:
248 * - id Tunnel unique identification
249 * - paths[0] To know where to send it next
250 * - metainfo: ready, speeds, accounting
257 struct MESH_TunnelID id;
260 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
262 MESH_TunnelNumber local_tid;
265 * Last time the tunnel was used
267 struct GNUNET_TIME_Absolute timestamp;
270 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
271 * containing peers added by id or by type, not intermediate peers.
273 struct GNUNET_CONTAINER_MultiHashMap *peers;
276 * Number of peers that are connected and potentially ready to receive data
278 unsigned int peers_ready;
281 * Number of peers that have been added to the tunnel
283 unsigned int peers_total;
286 * Client owner of the tunnel, if any
288 struct MeshClient *client;
291 * Messages ready to transmit
293 struct MeshQueue *queue_head;
294 struct MeshQueue *queue_tail;
299 struct MeshTunnelTree *tree;
302 * Application type we are looking for in this tunnel
304 GNUNET_MESH_ApplicationType type;
307 * Used to search peers offering a service
309 struct GNUNET_DHT_GetHandle *dht_get_type;
312 * Task to keep the used paths alive
314 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
317 * Task to destroy the tunnel after timeout
319 * FIXME: merge the two? a tunnel will have either
320 * a path refresh OR a timeout, never both!
322 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
327 * Info needed to work with tunnel paths and peers
334 struct MeshTunnel *t;
337 * Neighbouring peer to whom we send the packet to
339 struct MeshPeerInfo *peer;
344 struct MeshPeerPath *path;
347 * Position in peer's transmit queue
354 * Struct containing information about a client of the service
361 struct MeshClient *next;
362 struct MeshClient *prev;
365 * Tunnels that belong to this client, indexed by local id
367 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
370 * Handle to communicate with the client
372 struct GNUNET_SERVER_Client *handle;
375 * Applications that this client has claimed to provide
377 struct GNUNET_CONTAINER_MultiHashMap *apps;
380 * Messages that this client has declared interest in
382 struct GNUNET_CONTAINER_MultiHashMap *types;
386 * ID of the client, for debug messages
395 /******************************************************************************/
396 /************************ DEBUG FUNCTIONS ****************************/
397 /******************************************************************************/
401 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
402 * @param cls string to print
403 * @param tc task context
406 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
410 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
418 /******************************************************************************/
419 /*********************** GLOBAL VARIABLES ****************************/
420 /******************************************************************************/
425 static struct MeshClient *clients;
426 static struct MeshClient *clients_tail;
429 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
431 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
434 * Tunnels incoming, indexed by MESH_TunnelNumber
435 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
437 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
440 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
442 static struct GNUNET_CONTAINER_MultiHashMap *peers;
445 * Handle to communicate with core
447 static struct GNUNET_CORE_Handle *core_handle;
450 * Handle to communicate with transport
452 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
457 static struct GNUNET_DHT_Handle *dht_handle;
462 static struct GNUNET_SERVER_Handle *server_handle;
465 * Notification context, to send messages to local clients
467 static struct GNUNET_SERVER_NotificationContext *nc;
470 * Local peer own ID (memory efficient handle)
472 static GNUNET_PEER_Id myid;
475 * Local peer own ID (full value)
477 static struct GNUNET_PeerIdentity my_full_id;
482 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
487 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
490 * Tunnel ID for the next created tunnel (global tunnel number)
492 static MESH_TunnelNumber next_tid;
495 * Tunnel ID for the next incoming tunnel (local tunnel number)
497 static MESH_TunnelNumber next_local_tid;
500 * All application types provided by this peer
502 static struct GNUNET_CONTAINER_MultiHashMap *applications;
505 * All message types clients of this peer are interested in
507 static struct GNUNET_CONTAINER_MultiHashMap *types;
510 * Task to periodically announce provided applications
512 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
515 * Task to periodically announce itself in the network
517 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
520 unsigned int next_client_id;
524 /******************************************************************************/
525 /************************ ITERATORS ****************************/
526 /******************************************************************************/
528 /* FIXME move iterators here */
531 /******************************************************************************/
532 /************************ PERIODIC FUNCTIONS ****************************/
533 /******************************************************************************/
536 * Announce iterator over for each application provided by the peer
539 * @param key current key code
540 * @param value value in the hash map
541 * @return GNUNET_YES if we should continue to
546 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
548 /* FIXME are hashes in multihash map equal on all aquitectures? */
549 GNUNET_DHT_put (dht_handle, key, 10U,
550 GNUNET_DHT_RO_RECORD_ROUTE |
551 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, GNUNET_BLOCK_TYPE_TEST,
552 sizeof (struct GNUNET_PeerIdentity),
553 (const char *) &my_full_id,
555 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
556 &mesh_debug, "DHT_put for app completed");
558 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
560 APP_ANNOUNCE_TIME, NULL, NULL);
567 * Periodically announce what applications are provided by local clients
570 * @param tc task context
573 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
575 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
577 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
583 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
585 announce_applications_task =
586 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
596 * Periodically announce self id in the DHT
599 * @param tc task context
602 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
604 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
606 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
610 * - Set data expiration in function of X
614 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
615 GNUNET_i2s (&my_full_id));
617 GNUNET_DHT_put (dht_handle, /* DHT handle */
618 &my_full_id.hashPubKey, /* Key to use */
619 10U, /* Replication level */
620 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
621 GNUNET_BLOCK_TYPE_TEST, /* Block type */
622 sizeof (my_full_id), /* Size of the data */
623 (char *) &my_full_id, /* Data itself */
624 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
625 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
627 &mesh_debug, "DHT_put for id completed");
629 NULL, /* Continuation */
630 NULL); /* Continuation closure */
633 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
638 * Function to process paths received for a new peer addition. The recorded
639 * paths form the initial tunnel, which can be optimized later.
640 * Called on each result obtained for the DHT search.
643 * @param exp when will this value expire
644 * @param key key of the result
645 * @param type type of the result
646 * @param size number of bytes in data
647 * @param data pointer to the result data
650 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
651 const GNUNET_HashCode * key,
652 const struct GNUNET_PeerIdentity *get_path,
653 unsigned int get_path_length,
654 const struct GNUNET_PeerIdentity *put_path,
655 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
656 size_t size, const void *data);
659 /******************************************************************************/
660 /****************** GENERAL HELPER FUNCTIONS ************************/
661 /******************************************************************************/
664 * Check if client has registered with the service and has not disconnected
666 * @param client the client to check
668 * @return non-NULL if client exists in the global DLL
670 static struct MeshClient *
671 client_get (struct GNUNET_SERVER_Client *client)
673 struct MeshClient *c;
678 if (c->handle == client)
687 * Checks if a given client has subscribed to certain message type
689 * @param message_type Type of message to check
690 * @param c Client to check
692 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
697 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
701 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
702 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
707 * Allow a client to send more data after transmitting a multicast message
708 * which some neighbor has not yet accepted altough a reasonable time has
711 * @param cls Closure (DataDescriptor containing the task identifier)
712 * @param tc Task Context
715 client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
717 struct MeshDataDescriptor *info = cls;
719 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
722 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
723 "MESH: CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
726 *(info->timeout_task) = GNUNET_SCHEDULER_NO_TASK;
727 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
732 * Search for a tunnel by global ID using full PeerIdentities
734 * @param oid owner of the tunnel
735 * @param tid global tunnel number
737 * @return tunnel handler, NULL if doesn't exist
739 static struct MeshTunnel *
740 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
744 * Notify a tunnel that a connection has broken that affects at least
747 * @param t Tunnel affected.
748 * @param p1 Peer that got disconnected from p2.
749 * @param p2 Peer that got disconnected from p1.
751 * @return Short ID of the peer disconnected (either p1 or p2).
752 * 0 if the tunnel remained unaffected.
754 static GNUNET_PEER_Id
755 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
760 * Send the message to all clients that have subscribed to its type
762 * @param msg Pointer to the message itself
763 * @return number of clients this message was sent to
766 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
767 const struct GNUNET_MessageHeader *payload)
769 struct GNUNET_PeerIdentity *oid;
770 struct MeshClient *c;
771 struct MeshTunnel *t;
772 MESH_TunnelNumber *tid;
775 char cbuf[htons (msg->size)];
777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Sending to clients...\n");
778 type = ntohs (payload->type);
779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message of type %u\n", type);
781 memcpy (cbuf, msg, sizeof (cbuf));
782 switch (htons (msg->type))
784 struct GNUNET_MESH_Unicast *uc;
785 struct GNUNET_MESH_Multicast *mc;
786 struct GNUNET_MESH_ToOrigin *to;
788 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
789 uc = (struct GNUNET_MESH_Unicast *) cbuf;
793 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
794 mc = (struct GNUNET_MESH_Multicast *) cbuf;
798 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
799 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
807 t = tunnel_get (oid, ntohl (*tid));
813 *tid = htonl (t->local_tid);
814 for (count = 0, c = clients; c != NULL; c = c->next)
816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client %u\n", c->id);
817 if (client_is_subscribed (type, c))
820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending\n");
821 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
822 (struct GNUNET_MessageHeader
823 *) cbuf, GNUNET_YES);
831 * Notify the client that owns the tunnel that a peer has connected to it
832 * (the requested path to it has been confirmed).
834 * @param t Tunnel whose owner to notify
835 * @param id Short id of the peer that has connected
838 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
840 struct GNUNET_MESH_PeerControl pc;
842 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
843 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
844 pc.tunnel_id = htonl (t->local_tid);
845 GNUNET_PEER_resolve (id, &pc.peer);
846 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle, &pc.header,
852 * Notify all clients (not depending on registration status) that the incoming
853 * tunnel is no longer valid.
855 * @param t Tunnel that was destroyed.
858 send_clients_tunnel_destroy (struct MeshTunnel *t)
860 struct GNUNET_MESH_TunnelMessage msg;
862 msg.header.size = htons (sizeof (msg));
863 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
864 msg.tunnel_id = htonl (t->local_tid);
865 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
870 * Function called to notify a client about the socket
871 * being ready to queue more data. "buf" will be
872 * NULL and "size" zero if the socket was closed for
873 * writing in the meantime.
876 * @param size number of bytes available in buf
877 * @param buf where the callee should write the message
878 * @return number of bytes written to buf
881 send_core_create_path (void *cls, size_t size, void *buf);
885 * Function called to notify a client about the socket
886 * being ready to queue more data. "buf" will be
887 * NULL and "size" zero if the socket was closed for
888 * writing in the meantime.
890 * @param cls closure (data itself)
891 * @param size number of bytes available in buf
892 * @param buf where the callee should write the message
894 * @return number of bytes written to buf
897 send_core_data_multicast (void *cls, size_t size, void *buf);
901 * Decrements the reference counter and frees all resources if needed
903 * @param dd Data Descriptor used in a multicast message
906 data_descriptor_decrement_multicast (struct MeshDataDescriptor *dd)
908 if (0 == --(*(dd->copies)))
910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
911 if (NULL != dd->client)
913 if (GNUNET_SCHEDULER_NO_TASK != *(dd->timeout_task))
915 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
916 "MESH: cancelling client timeout (%u)...\n",
917 *(dd->timeout_task));
918 GNUNET_SCHEDULER_cancel (*(dd->timeout_task));
919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
920 GNUNET_SERVER_receive_done (dd->client, GNUNET_OK);
922 GNUNET_free (dd->timeout_task);
924 GNUNET_free (dd->copies);
925 GNUNET_free (dd->data);
931 * Cancel a core transmission that was already requested and free all resources
932 * associated to the request.
934 * @param peer PeeInfo of the peer whose transmission is cancelled.
935 * @param i Position of the transmission to be cancelled.
938 peer_info_cancel_transmission (struct MeshPeerInfo *peer, unsigned int i)
940 if (NULL != peer->core_transmit[i])
942 struct MeshDataDescriptor *dd;
943 struct MeshPathInfo *path_info;
947 struct GNUNET_PeerIdentity id;
949 GNUNET_PEER_resolve (peer->id, &id);
950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
951 "MESH: Cancelling data transmission at %s [%u]\n",
952 GNUNET_i2s (&id), i);
953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message type %u\n",
957 /* TODO: notify that tranmission has failed */
958 switch (peer->types[i])
960 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
961 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
962 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
965 data_descriptor_decrement_multicast (dd);
967 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
969 path_info = peer->infos[i];
970 path_destroy (path_info->path);
974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
976 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
977 peer->core_transmit[i] = NULL;
978 GNUNET_free (peer->infos[i]);
984 * Get a unused CORE slot to transmit a message to a peer. If all the slots
985 * are used, cancel one and return it's position.
987 * @param peer PeerInfo of the neighbor we want to transmit to.
989 * @return The index of an available slot to transmit to the neighbor.
992 peer_info_transmit_slot (struct MeshPeerInfo *peer)
996 for (i = 0; peer->core_transmit[i]; i++)
998 if (i == (CORE_QUEUE_SIZE - 1))
1000 /* All positions are taken! Overwriting! */
1002 peer_info_cancel_transmission (peer, 0);
1011 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1012 * and insert it in the appropiate structures if the peer is not known yet.
1014 * @param peer Full identity of the peer.
1016 * @return Existing or newly created peer info.
1018 static struct MeshPeerInfo *
1019 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1021 struct MeshPeerInfo *peer_info;
1023 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1024 if (NULL == peer_info)
1027 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1028 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1029 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1030 peer_info->id = GNUNET_PEER_intern (peer);
1038 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1039 * and insert it in the appropiate structures if the peer is not known yet.
1041 * @param peer Short identity of the peer.
1043 * @return Existing or newly created peer info.
1045 static struct MeshPeerInfo *
1046 peer_info_get_short (const GNUNET_PEER_Id peer)
1048 struct GNUNET_PeerIdentity id;
1050 GNUNET_PEER_resolve (peer, &id);
1051 return peer_info_get (&id);
1056 * Iterator to remove the tunnel from the list of tunnels a peer participates
1059 * @param cls Closure (tunnel info)
1060 * @param key GNUNET_PeerIdentity of the peer (unused)
1061 * @param value PeerInfo of the peer
1063 * @return always GNUNET_YES, to keep iterating
1066 peer_info_delete_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
1068 struct MeshTunnel *t = cls;
1069 struct MeshPeerInfo *peer = value;
1072 for (i = 0; i < peer->ntunnels; i++)
1075 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1078 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1079 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1088 * Core callback to write a
1090 * @param cls Closure (MeshDataDescriptor with data in "data" member).
1091 * @param size Number of bytes available in buf.
1092 * @param buf Where the to write the message.
1094 * @return number of bytes written to buf
1097 send_core_data_raw (void *cls, size_t size, void *buf)
1099 struct MeshDataDescriptor *info = cls;
1100 struct GNUNET_MessageHeader *msg;
1103 GNUNET_assert (NULL != info);
1104 GNUNET_assert (NULL != info->data);
1105 msg = (struct GNUNET_MessageHeader *) info->data;
1106 total_size = ntohs (msg->size);
1108 if (total_size > size)
1110 struct GNUNET_PeerIdentity id;
1112 GNUNET_PEER_resolve (info->peer->id, &id);
1113 info->peer->core_transmit[info->handler_n] =
1114 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1115 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1116 size, &send_core_data_raw, info);
1119 info->peer->core_transmit[info->handler_n] = NULL;
1120 memcpy (buf, msg, total_size);
1121 GNUNET_free (info->data);
1128 * Sends an already built message to a peer, properly registrating
1129 * all used resources.
1131 * @param message Message to send. Fucntion makes a copy of it.
1132 * @param peer Short ID of the neighbor whom to send the message.
1135 send_message (const struct GNUNET_MessageHeader *message,
1136 const struct GNUNET_PeerIdentity *peer)
1138 struct MeshDataDescriptor *info;
1139 struct MeshPeerInfo *neighbor;
1140 struct MeshPeerPath *p;
1144 // GNUNET_TRANSPORT_try_connect();
1146 size = ntohs (message->size);
1147 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1148 info->data = GNUNET_malloc (size);
1149 memcpy (info->data, message, size);
1150 neighbor = peer_info_get (peer);
1151 for (p = neighbor->path_head; NULL != p; p = p->next)
1164 i = peer_info_transmit_slot (neighbor);
1165 info->handler_n = i;
1166 info->peer = neighbor;
1167 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1168 neighbor->infos[i] = info;
1169 neighbor->core_transmit[i] =
1170 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1171 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1172 size, &send_core_data_raw, info);
1178 * Sends a CREATE PATH message for a path to a peer, properly registrating
1179 * all used resources.
1181 * @param peer PeerInfo of the final peer for whom this path is being created.
1182 * @param p Path itself.
1183 * @param t Tunnel for which the path is created.
1186 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
1187 struct MeshTunnel *t)
1189 struct GNUNET_PeerIdentity id;
1190 struct MeshPathInfo *path_info;
1191 struct MeshPeerInfo *neighbor;
1196 p = tree_get_path_to_peer (t->tree, peer->id);
1203 for (i = 0; i < p->length; i++)
1205 if (p->peers[i] == myid)
1208 if (i >= p->length - 1)
1214 GNUNET_PEER_resolve (p->peers[i + 1], &id);
1216 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1217 path_info->path = p;
1219 neighbor = peer_info_get (&id);
1220 path_info->peer = neighbor;
1221 path_info->pos = peer_info_transmit_slot (neighbor);
1222 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1223 neighbor->infos[path_info->pos] = path_info;
1224 neighbor->core_transmit[path_info->pos] = GNUNET_CORE_notify_transmit_ready (core_handle, /* handle */
1227 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1229 sizeof (struct GNUNET_MESH_ManipulatePath) + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1230 &send_core_create_path, /* callback */
1231 path_info); /* cls */
1236 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1238 * @param t Tunnel whose path to destroy.
1239 * @param destination Short ID of the peer to whom the path to destroy.
1242 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1244 struct MeshPeerPath *p;
1247 p = tree_get_path_to_peer (t->tree, destination);
1253 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1254 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1256 struct GNUNET_MESH_ManipulatePath *msg;
1257 struct GNUNET_PeerIdentity *pi;
1261 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1262 msg->header.size = htons (size);
1263 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1264 msg->tid = htonl (t->id.tid);
1265 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1266 for (i = 0; i < p->length; i++)
1268 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
1270 send_message (&msg->header, path_get_first_hop (t->tree, destination));
1277 * Try to establish a new connection to this peer.
1278 * Use the best path for the given tunnel.
1279 * If the peer doesn't have any path to it yet, try to get one.
1280 * If the peer already has some path, send a CREATE PATH towards it.
1282 * @param peer PeerInfo of the peer.
1283 * @param t Tunnel for which to create the path, if possible.
1286 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1288 struct MeshPeerPath *p;
1289 struct MeshPathInfo *path_info;
1291 if (NULL != peer->path_head)
1293 p = tree_get_path_to_peer (t->tree, peer->id);
1302 send_create_path (peer, p, t);
1307 send_client_peer_connected (t, myid);
1310 else if (NULL == peer->dhtget)
1312 struct GNUNET_PeerIdentity id;
1314 GNUNET_PEER_resolve (peer->id, &id);
1315 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1316 path_info->peer = peer;
1318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1319 "MESH: Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1320 peer->dhtgetcls = path_info;
1321 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1322 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1323 GNUNET_BLOCK_TYPE_TEST, /* type */
1324 &id.hashPubKey, /* key to search */
1325 4, /* replication level */
1326 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, /* xquery */
1327 0, /* xquery bits */
1328 &dht_get_id_handler, path_info);
1330 /* Otherwise, there is no path but the DHT get is already started. */
1335 * Task to delay the connection of a peer
1337 * @param cls Closure (path info with tunnel and peer to connect).
1338 * Will be free'd on exection.
1339 * @param tc TaskContext
1342 peer_info_connect_task (void *cls,
1343 const struct GNUNET_SCHEDULER_TaskContext *tc)
1345 struct MeshPathInfo *path_info = cls;
1347 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1352 peer_info_connect (path_info->peer, path_info->t);
1358 * Destroy the peer_info and free any allocated resources linked to it
1360 * @param pi The peer_info to destroy.
1362 * @return GNUNET_OK on success
1365 peer_info_destroy (struct MeshPeerInfo *pi)
1367 struct GNUNET_PeerIdentity id;
1368 struct MeshPeerPath *p;
1369 struct MeshPeerPath *nextp;
1372 GNUNET_PEER_resolve (pi->id, &id);
1373 GNUNET_PEER_change_rc (pi->id, -1);
1376 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1379 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1380 "MESH: removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1382 if (NULL != pi->dhtget)
1384 GNUNET_DHT_get_stop (pi->dhtget);
1385 GNUNET_free (pi->dhtgetcls);
1387 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1389 peer_info_cancel_transmission (pi, i);
1395 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1405 * Remove all paths that rely on a direct connection between p1 and p2
1406 * from the peer itself and notify all tunnels about it.
1408 * @param peer PeerInfo of affected peer.
1409 * @param p1 GNUNET_PEER_Id of one peer.
1410 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1413 * TODO: optimize (see below)
1416 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1419 struct MeshPeerPath *p;
1420 struct MeshPeerPath *aux;
1421 struct MeshPeerInfo *peer_d;
1423 unsigned int destroyed;
1429 p = peer->path_head;
1433 for (i = 0; i < (p->length - 1); i++)
1435 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1436 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1438 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1449 for (i = 0; i < peer->ntunnels; i++)
1451 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1452 if (0 == d) continue;
1454 * Problem: one or more peers have been deleted from the tunnel tree.
1455 * We don't know who they are to try to add them again.
1456 * We need to try to find a new path for each of the disconnected peers.
1457 * Some of them might already have a path to reach them that does not
1458 * involve p1 and p2. Adding all anew might render in a better tree than
1459 * the trivial immediate fix.
1461 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1462 * its children will be reachable trough him.
1464 peer_d = peer_info_get_short (d);
1467 for (p = peer_d->path_head; NULL != p; p = p->next)
1469 if ((cost = path_get_cost (peer->tunnels[i]->tree, p)) < best)
1477 /* No callback, as peer will be already disconnected and a connection
1478 * scheduled by tunnel_notify_connection_broken.
1480 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
1484 peer_info_connect (peer_d, peer->tunnels[i]);
1491 * Add the path to the peer and update the path used to reach it in case this
1494 * @param peer_info Destination peer to add the path to.
1495 * @param path New path to add. Last peer must be the peer in arg 1.
1496 * Path will be either used of freed if already known.
1497 * @param trusted Do we trust that this path is real?
1500 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1503 struct MeshPeerPath *aux;
1507 if ((NULL == peer_info) || (NULL == path))
1510 path_destroy (path);
1513 if (path->length <= 2 && GNUNET_NO == trusted)
1515 /* Only allow CORE to tell us about direct paths */
1516 path_destroy (path);
1519 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1520 for (l = 1; l < path->length; l++)
1522 if (path->peers[l] == myid)
1524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shortening path by %u\n", l);
1525 for (l2 = 0; l2 < path->length - l; l2++)
1527 path->peers[l2] = path->peers[l + l2];
1532 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1537 struct GNUNET_PeerIdentity id;
1539 GNUNET_PEER_resolve (peer_info->id, &id);
1540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: adding path [%u] to peer %s\n",
1541 path->length, GNUNET_i2s (&id));
1544 l = path_get_length (path);
1551 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1552 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1554 l2 = path_get_length (aux);
1557 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1558 peer_info->path_tail, aux, path);
1563 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1565 path_destroy (path);
1570 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1577 * Add the path to the origin peer and update the path used to reach it in case
1578 * this is the shortest.
1579 * The path is given in peer_info -> destination, therefore we turn the path
1580 * upside down first.
1582 * @param peer_info Peer to add the path to, being the origin of the path.
1583 * @param path New path to add after being inversed.
1584 * @param trusted Do we trust that this path is real?
1587 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1588 struct MeshPeerPath *path, int trusted)
1591 peer_info_add_path (peer_info, path, trusted);
1596 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1597 * to obtain a local peer -> destination path and interning the peer ids.
1599 * @return Newly allocated and created path
1601 static struct MeshPeerPath *
1602 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1603 unsigned int get_path_length,
1604 const struct GNUNET_PeerIdentity *put_path,
1605 unsigned int put_path_length)
1607 struct MeshPeerPath *p;
1613 GNUNET_PEER_change_rc (myid, 1);
1614 i = get_path_length;
1615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1616 for (i--; i >= 0; i--)
1618 id = GNUNET_PEER_intern (&get_path[i]);
1619 if (p->length > 0 && id == p->peers[p->length - 1])
1621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1622 GNUNET_PEER_change_rc (id, -1);
1626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Adding from GET: %s.\n",
1627 GNUNET_i2s (&get_path[i]));
1629 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1630 p->peers[p->length - 1] = id;
1633 i = put_path_length;
1634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1635 for (i--; i >= 0; i--)
1637 id = GNUNET_PEER_intern (&put_path[i]);
1640 /* PUT path went through us, so discard the path up until now and start
1641 * from here to get a much shorter (and loop-free) path.
1646 if (p->length > 0 && id == p->peers[p->length - 1])
1648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1649 GNUNET_PEER_change_rc (id, -1);
1653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Adding from PUT: %s.\n",
1654 GNUNET_i2s (&put_path[i]));
1656 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1657 p->peers[p->length - 1] = id;
1661 if (get_path_length > 0)
1662 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (first of GET: %s)\n",
1663 GNUNET_i2s (&get_path[0]));
1664 if (put_path_length > 0)
1665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (first of PUT: %s)\n",
1666 GNUNET_i2s (&put_path[0]));
1667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: In total: %d hops\n",
1669 for (i = 0; i < p->length; i++)
1671 struct GNUNET_PeerIdentity peer_id;
1673 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %u: %s\n", p->peers[i],
1675 GNUNET_i2s (&peer_id));
1683 * Send keepalive packets for a peer
1685 * @param cls Closure (tunnel for which to send the keepalive).
1686 * @param tc Notification context.
1688 * TODO: implement explicit multicast keepalive?
1691 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1695 * Search for a tunnel among the incoming tunnels
1697 * @param tid the local id of the tunnel
1699 * @return tunnel handler, NULL if doesn't exist
1701 static struct MeshTunnel *
1702 tunnel_get_incoming (MESH_TunnelNumber tid)
1704 GNUNET_HashCode hash;
1706 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1707 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1708 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1713 * Search for a tunnel among the tunnels for a client
1715 * @param c the client whose tunnels to search in
1716 * @param tid the local id of the tunnel
1718 * @return tunnel handler, NULL if doesn't exist
1720 static struct MeshTunnel *
1721 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1723 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1725 return tunnel_get_incoming (tid);
1729 GNUNET_HashCode hash;
1731 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1732 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1738 * Search for a tunnel by global ID using PEER_ID
1740 * @param pi owner of the tunnel
1741 * @param tid global tunnel number
1743 * @return tunnel handler, NULL if doesn't exist
1745 static struct MeshTunnel *
1746 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1748 struct MESH_TunnelID id;
1749 GNUNET_HashCode hash;
1754 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1755 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1760 * Search for a tunnel by global ID using full PeerIdentities
1762 * @param oid owner of the tunnel
1763 * @param tid global tunnel number
1765 * @return tunnel handler, NULL if doesn't exist
1767 static struct MeshTunnel *
1768 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1770 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1775 * Callback used to notify a client owner of a tunnel that a peer has
1776 * disconnected, most likely because of a path change.
1778 * @param cls Closure (tunnel this notification is about).
1779 * @param peer_id Short ID of disconnected peer.
1782 notify_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
1784 struct MeshTunnel *t = cls;
1785 struct MeshPeerInfo *peer;
1786 struct MeshPathInfo *path_info;
1788 if (NULL != t->client && NULL != nc)
1790 struct GNUNET_MESH_PeerControl msg;
1792 msg.header.size = htons (sizeof (msg));
1793 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1794 msg.tunnel_id = htonl (t->local_tid);
1795 GNUNET_PEER_resolve (peer_id, &msg.peer);
1796 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1797 &msg.header, GNUNET_NO);
1799 peer = peer_info_get_short (peer_id);
1800 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1801 path_info->peer = peer;
1803 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
1808 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1809 * needed rescources.
1810 * If peer already exists, reevaluate shortest path and change if different.
1812 * @param t Tunnel we want to add a new peer to
1813 * @param peer PeerInfo of the peer being added
1817 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1819 struct GNUNET_PeerIdentity id;
1820 struct MeshPeerPath *best_p;
1821 struct MeshPeerPath *p;
1822 unsigned int best_cost;
1825 GNUNET_PEER_resolve (peer->id, &id);
1827 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
1830 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1831 GNUNET_assert (GNUNET_OK ==
1832 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
1834 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1837 if (NULL != (p = peer->path_head))
1840 best_cost = path_get_cost (t->tree, p);
1843 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1850 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected, t);
1851 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1852 t->path_refresh_task =
1853 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
1857 /* Start a DHT get if necessary */
1858 peer_info_connect (peer, t);
1863 * Add a path to a tunnel which we don't own, just to remember the next hop.
1864 * If destination node was already in the tunnel, the first hop information
1865 * will be replaced with the new path.
1867 * @param t Tunnel we want to add a new peer to
1868 * @param p Path to add
1869 * @param own_pos Position of local node in path.
1873 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
1874 unsigned int own_pos)
1876 struct GNUNET_PeerIdentity id;
1878 GNUNET_assert (0 != own_pos);
1879 tree_add_path (t->tree, p, NULL, NULL);
1880 if (tree_get_me (t->tree) == 0)
1881 tree_set_me (t->tree, p->peers[own_pos]);
1882 if (own_pos < p->length - 1)
1884 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1885 tree_update_first_hops (t->tree, tree_get_me (t->tree), &id);
1891 * Notifies a tunnel that a connection has broken that affects at least
1892 * some of its peers. Sends a notification towards the root of the tree.
1893 * In case the peer is the owner of the tree, notifies the client that owns
1894 * the tunnel and tries to reconnect.
1896 * @param t Tunnel affected.
1897 * @param p1 Peer that got disconnected from p2.
1898 * @param p2 Peer that got disconnected from p1.
1900 * @return Short ID of the peer disconnected (either p1 or p2).
1901 * 0 if the tunnel remained unaffected.
1903 static GNUNET_PEER_Id
1904 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1910 tree_notify_connection_broken (t->tree, p1, p2, ¬ify_peer_disconnected,
1912 if (myid != p1 && myid != p2)
1918 if (tree_get_predecessor (t->tree) != 0)
1920 /* We are the peer still connected, notify owner of the disconnection. */
1921 struct GNUNET_MESH_PathBroken msg;
1922 struct GNUNET_PeerIdentity neighbor;
1924 msg.header.size = htons (sizeof (msg));
1925 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1926 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1927 msg.tid = htonl (t->id.tid);
1928 msg.peer1 = my_full_id;
1929 GNUNET_PEER_resolve (pid, &msg.peer2);
1930 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
1931 send_message (&msg.header, &neighbor);
1938 struct MeshMulticastData
1940 struct MeshTunnel *t;
1942 GNUNET_SCHEDULER_TaskIdentifier *task;
1944 unsigned int *reference_counter;
1953 * Send a multicast packet to a neighbor.
1956 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
1958 struct MeshMulticastData *mdata = cls;
1959 struct MeshDataDescriptor *info;
1960 struct GNUNET_PeerIdentity neighbor;
1963 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1965 info->data = mdata->data;
1966 info->size = mdata->data_len;
1967 info->copies = mdata->reference_counter;
1968 (*(mdata->reference_counter))++;
1970 if (NULL != mdata->t->client)
1972 info->client = mdata->t->client->handle;
1973 info->timeout_task = mdata->task;
1975 info->destination = neighbor_id;
1976 GNUNET_PEER_resolve (neighbor_id, &neighbor);
1978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending to %s...\n",
1979 GNUNET_i2s (&neighbor));
1981 info->peer = peer_info_get (&neighbor);
1982 GNUNET_assert (NULL != info->peer);
1983 i = peer_info_transmit_slot (info->peer);
1984 info->handler_n = i;
1985 info->peer->infos[i] = info;
1986 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1987 info->peer->core_transmit[i] =
1988 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
1989 GNUNET_TIME_UNIT_FOREVER_REL,
1990 &neighbor, info->size,
1991 &send_core_data_multicast, info);
1995 * Send a message in a tunnel in multicast, sending a copy to each child node
1996 * down the local one in the tunnel tree.
1998 * @param t Tunnel in which to send the data.
1999 * @param msg Message to be sent
2002 tunnel_send_multicast (struct MeshTunnel *t,
2003 const struct GNUNET_MessageHeader *msg)
2005 struct MeshMulticastData *mdata;
2008 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2009 "MESH: sending a multicast packet...\n");
2011 GNUNET_assert (tree_get_me (t->tree) != 0);
2012 mdata = GNUNET_malloc (sizeof (struct MeshMulticastData));
2013 mdata->data_len = ntohs (msg->size);
2014 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2015 mdata->data = GNUNET_malloc (mdata->data_len);
2017 memcpy (mdata->data, msg, mdata->data_len);
2018 if (NULL != t->client)
2020 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
2022 GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT, &client_allow_send,
2026 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
2027 if (*(mdata->reference_counter) == 0)
2029 GNUNET_free (mdata->data);
2030 GNUNET_free (mdata->reference_counter);
2031 if (NULL != mdata->task)
2033 GNUNET_free (mdata->task);
2036 GNUNET_free (mdata);
2038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2039 "MESH: sending a multicast packet done\n");
2046 * Send a message to all peers in this tunnel that the tunnel is no longer
2049 * @param t The tunnel whose peers to notify.
2052 tunnel_send_destroy (struct MeshTunnel *t)
2054 struct GNUNET_MESH_TunnelDestroy msg;
2056 msg.header.size = htons (sizeof (msg));
2057 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2058 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2059 msg.tid = htonl (t->id.tid);
2060 tunnel_send_multicast (t, &msg.header);
2066 * Destroy the tunnel and free any allocated resources linked to it
2068 * @param t the tunnel to destroy
2070 * @return GNUNET_OK on success
2073 tunnel_destroy (struct MeshTunnel *t)
2075 struct MeshClient *c;
2076 struct MeshQueue *q;
2077 struct MeshQueue *qn;
2078 GNUNET_HashCode hash;
2087 struct GNUNET_PeerIdentity id;
2089 GNUNET_PEER_resolve (t->id.oid, &id);
2090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel %s [%x]\n",
2091 GNUNET_i2s (&id), t->id.tid);
2093 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2097 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2098 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2103 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2105 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
2109 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2111 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2112 GNUNET_break (GNUNET_YES ==
2113 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash,
2116 if (NULL != t->peers)
2118 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
2120 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2125 if (NULL != q->data)
2126 GNUNET_free (q->data);
2130 /* TODO cancel core transmit ready in case it was active */
2132 tree_destroy (t->tree);
2133 if (NULL != t->dht_get_type)
2134 GNUNET_DHT_get_stop (t->dht_get_type);
2135 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2136 GNUNET_SCHEDULER_cancel (t->timeout_task);
2137 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2138 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
2145 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2146 * that are no longer needed, as well as nodes of no longer reachable peers.
2147 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2149 * @param t Tunnel from which to remove the path.
2150 * @param p Peer which should be removed.
2153 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
2155 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
2161 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2162 * client when the client disconnects.
2164 * @param cls closure (client that is disconnecting)
2165 * @param key the hash of the local tunnel id (used to access the hashmap)
2166 * @param value the value stored at the key (tunnel to destroy)
2168 * @return GNUNET_OK on success
2171 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2173 struct MeshTunnel *t = value;
2176 r = tunnel_destroy (t);
2182 * Timeout function, destroys tunnel if called
2184 * @param cls Closure (tunnel to destroy).
2185 * @param tc TaskContext
2188 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2190 struct MeshTunnel *t = cls;
2192 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2194 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2199 * Resets the tunnel timeout. Starts it if no timeout was running.
2201 * @param t Tunnel whose timeout to reset.
2204 tunnel_reset_timeout (struct MeshTunnel *t)
2206 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2207 GNUNET_SCHEDULER_cancel (t->timeout_task);
2209 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2210 (REFRESH_PATH_TIME, 4), &tunnel_timeout, t);
2214 /******************************************************************************/
2215 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2216 /******************************************************************************/
2219 * Function called to notify a client about the socket
2220 * being ready to queue more data. "buf" will be
2221 * NULL and "size" zero if the socket was closed for
2222 * writing in the meantime.
2224 * @param cls closure
2225 * @param size number of bytes available in buf
2226 * @param buf where the callee should write the message
2227 * @return number of bytes written to buf
2230 send_core_create_path (void *cls, size_t size, void *buf)
2232 struct MeshPathInfo *info = cls;
2233 struct GNUNET_MESH_ManipulatePath *msg;
2234 struct GNUNET_PeerIdentity *peer_ptr;
2235 struct MeshPeerInfo *peer = info->peer;
2236 struct MeshTunnel *t = info->t;
2237 struct MeshPeerPath *p = info->path;
2241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATE PATH sending...\n");
2243 sizeof (struct GNUNET_MESH_ManipulatePath) +
2244 p->length * sizeof (struct GNUNET_PeerIdentity);
2246 if (size < size_needed || NULL == buf)
2248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n", size,
2252 info->peer->core_transmit[info->pos] =
2253 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2254 GNUNET_TIME_UNIT_FOREVER_REL,
2255 path_get_first_hop (t->tree,
2257 size_needed, &send_core_create_path,
2261 info->peer->core_transmit[info->pos] = NULL;
2264 struct GNUNET_PeerIdentity id;
2266 GNUNET_PEER_resolve (peer->id, &id);
2267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2268 "MESH: setting core_transmit %s [%u] to NULL\n",
2269 GNUNET_i2s (&id), info->pos);
2272 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2273 msg->header.size = htons (size_needed);
2274 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2275 msg->tid = ntohl (t->id.tid);
2277 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2278 for (i = 0; i < p->length; i++)
2280 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2287 "MESH: CREATE PATH (%u bytes long) sent!\n", size_needed);
2293 * Function called to notify a client about the socket
2294 * being ready to queue more data. "buf" will be
2295 * NULL and "size" zero if the socket was closed for
2296 * writing in the meantime.
2298 * @param cls closure (data itself)
2299 * @param size number of bytes available in buf
2300 * @param buf where the callee should write the message
2302 * @return number of bytes written to buf
2305 send_core_data_multicast (void *cls, size_t size, void *buf)
2307 struct MeshDataDescriptor *info = cls;
2310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2311 GNUNET_assert (NULL != info);
2312 GNUNET_assert (NULL != info->peer);
2313 total_size = info->size;
2314 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2316 if (total_size > size)
2319 struct GNUNET_PeerIdentity id;
2321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2322 "MESH: Multicast: retransmitting... (%u/%u)\n", size,
2324 GNUNET_PEER_resolve (info->peer->id, &id);
2325 info->peer->core_transmit[info->handler_n] =
2326 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2327 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2329 &send_core_data_multicast, info);
2332 info->peer->core_transmit[info->handler_n] = NULL;
2333 info->peer->infos[info->handler_n] = NULL;
2334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2335 memcpy (buf, info->data, total_size);
2338 struct GNUNET_MESH_Multicast *mc;
2339 struct GNUNET_MessageHeader *mh;
2342 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2344 mc = (struct GNUNET_MESH_Multicast *) mh;
2345 mh = (struct GNUNET_MessageHeader *) &mc[1];
2346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2347 "MESH: multicast, payload type %u\n", ntohs (mh->type));
2348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2349 "MESH: multicast, payload size %u\n", ntohs (mh->size));
2353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type %u\n",
2358 data_descriptor_decrement_multicast (info);
2359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2367 * Function called to notify a client about the socket
2368 * being ready to queue more data. "buf" will be
2369 * NULL and "size" zero if the socket was closed for
2370 * writing in the meantime.
2372 * @param cls closure (MeshDataDescriptor)
2373 * @param size number of bytes available in buf
2374 * @param buf where the callee should write the message
2375 * @return number of bytes written to buf
2378 send_core_path_ack (void *cls, size_t size, void *buf)
2380 struct MeshDataDescriptor *info = cls;
2381 struct GNUNET_MESH_PathACK *msg = buf;
2383 GNUNET_assert (NULL != info);
2386 info->peer->core_transmit[info->handler_n] = NULL;
2388 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2393 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2394 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2395 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2396 msg->tid = htonl (info->origin->tid);
2397 msg->peer_id = my_full_id;
2399 /* TODO add signature */
2401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2402 return sizeof (struct GNUNET_MESH_PathACK);
2406 /******************************************************************************/
2407 /******************** MESH NETWORK HANDLERS **************************/
2408 /******************************************************************************/
2412 * Core handler for path creation
2414 * @param cls closure
2415 * @param message message
2416 * @param peer peer identity this notification is about
2417 * @param atsi performance data
2418 * @param atsi_count number of records in 'atsi'
2420 * @return GNUNET_OK to keep the connection open,
2421 * GNUNET_SYSERR to close it (signal serious error)
2424 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2425 const struct GNUNET_MessageHeader *message,
2426 const struct GNUNET_ATS_Information *atsi,
2427 unsigned int atsi_count)
2429 unsigned int own_pos;
2432 MESH_TunnelNumber tid;
2433 struct GNUNET_MESH_ManipulatePath *msg;
2434 struct GNUNET_PeerIdentity *pi;
2435 GNUNET_HashCode hash;
2436 struct MeshPeerPath *path;
2437 struct MeshPeerInfo *dest_peer_info;
2438 struct MeshPeerInfo *orig_peer_info;
2439 struct MeshTunnel *t;
2441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2442 "MESH: Received a path create msg [%s]\n",
2443 GNUNET_i2s (&my_full_id));
2444 size = ntohs (message->size);
2445 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2447 GNUNET_break_op (0);
2451 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2452 if (size % sizeof (struct GNUNET_PeerIdentity))
2454 GNUNET_break_op (0);
2457 size /= sizeof (struct GNUNET_PeerIdentity);
2460 GNUNET_break_op (0);
2463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: path has %u hops.\n", size);
2464 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2466 tid = ntohl (msg->tid);
2467 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2468 t = tunnel_get (pi, tid);
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470 "MESH: path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
2473 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2474 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2475 t->id.oid = GNUNET_PEER_intern (pi);
2477 while (NULL != tunnel_get_incoming (next_local_tid))
2478 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2479 t->local_tid = next_local_tid++;
2480 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2481 t->tree = tree_new (t->id.oid);
2483 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2485 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2486 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2492 tunnel_reset_timeout (t);
2493 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2495 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2496 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2504 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2505 if (NULL == dest_peer_info)
2507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2508 "MESH: Creating PeerInfo for destination.\n");
2509 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2510 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2511 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2513 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2515 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2516 if (NULL == orig_peer_info)
2518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2519 "MESH: Creating PeerInfo for origin.\n");
2520 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2521 orig_peer_info->id = GNUNET_PEER_intern (pi);
2522 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2523 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2526 path = path_new (size);
2528 for (i = 0; i < size; i++)
2530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... adding %s\n",
2531 GNUNET_i2s (&pi[i]));
2532 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2533 if (path->peers[i] == myid)
2536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Own position: %u\n", own_pos);
2539 /* cannot be self, must be 'not found' */
2540 /* create path: self not found in path through self */
2541 GNUNET_break_op (0);
2542 path_destroy (path);
2543 /* FIXME error. destroy tunnel? leave for timeout? */
2546 tunnel_add_path (t, path, own_pos);
2547 if (own_pos == size - 1)
2549 /* It is for us! Send ack. */
2550 struct GNUNET_MESH_TunnelNotification cmsg;
2551 struct MeshDataDescriptor *info;
2554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2555 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
2556 if (NULL == t->peers)
2557 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
2558 GNUNET_break (GNUNET_OK ==
2559 GNUNET_CONTAINER_multihashmap_put (t->peers,
2560 &my_full_id.hashPubKey,
2563 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2564 /* FIXME use send_message */
2565 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2566 info->origin = &t->id;
2567 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2568 GNUNET_assert (NULL != info->peer);
2569 j = peer_info_transmit_slot (info->peer);
2570 info->handler_n = j;
2571 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2572 info->peer->infos[j] = info;
2573 info->peer->core_transmit[j] =
2574 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2575 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2576 sizeof (struct GNUNET_MESH_PathACK),
2577 &send_core_path_ack, info);
2578 cmsg.header.size = htons (sizeof (cmsg));
2579 cmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2580 GNUNET_PEER_resolve (t->id.oid, &cmsg.peer);
2581 cmsg.tunnel_id = htonl (t->local_tid);
2582 GNUNET_SERVER_notification_context_broadcast (nc, &cmsg.header, GNUNET_NO);
2586 struct MeshPeerPath *path2;
2588 /* It's for somebody else! Retransmit. */
2589 path2 = path_duplicate (path);
2590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting.\n");
2591 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
2592 path2 = path_duplicate (path);
2593 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
2594 send_create_path (dest_peer_info, path, t);
2601 * Core handler for path destruction
2603 * @param cls closure
2604 * @param message message
2605 * @param peer peer identity this notification is about
2606 * @param atsi performance data
2607 * @param atsi_count number of records in 'atsi'
2609 * @return GNUNET_OK to keep the connection open,
2610 * GNUNET_SYSERR to close it (signal serious error)
2613 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2614 const struct GNUNET_MessageHeader *message,
2615 const struct GNUNET_ATS_Information *atsi,
2616 unsigned int atsi_count)
2618 struct GNUNET_MESH_ManipulatePath *msg;
2619 struct GNUNET_PeerIdentity *pi;
2620 struct MeshPeerPath *path;
2621 struct MeshTunnel *t;
2622 unsigned int own_pos;
2626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2627 "MESH: Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
2628 size = ntohs (message->size);
2629 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2631 GNUNET_break_op (0);
2635 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2636 if (size % sizeof (struct GNUNET_PeerIdentity))
2638 GNUNET_break_op (0);
2641 size /= sizeof (struct GNUNET_PeerIdentity);
2644 GNUNET_break_op (0);
2647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: path has %u hops.\n", size);
2649 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2650 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2652 "MESH: path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
2654 t = tunnel_get (pi, ntohl (msg->tid));
2657 /* TODO notify back: we don't know this tunnel */
2658 GNUNET_break_op (0);
2661 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2662 path = path_new (size);
2664 for (i = 0; i < size; i++)
2666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... adding %s\n",
2667 GNUNET_i2s (&pi[i]));
2668 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2669 if (path->peers[i] == myid)
2672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Own position: %u\n", own_pos);
2673 if (own_pos < path->length - 1)
2674 send_message (message, &pi[own_pos + 1]);
2675 tunnel_delete_peer (t, path->peers[path->length - 1]);
2676 path_destroy (path);
2682 * Core handler for notifications of broken paths
2684 * @param cls closure
2685 * @param message message
2686 * @param peer peer identity this notification is about
2687 * @param atsi performance data
2688 * @param atsi_count number of records in 'atsi'
2690 * @return GNUNET_OK to keep the connection open,
2691 * GNUNET_SYSERR to close it (signal serious error)
2694 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
2695 const struct GNUNET_MessageHeader *message,
2696 const struct GNUNET_ATS_Information *atsi,
2697 unsigned int atsi_count)
2699 struct GNUNET_MESH_PathBroken *msg;
2700 struct MeshTunnel *t;
2702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2703 "MESH: Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
2704 msg = (struct GNUNET_MESH_PathBroken *) message;
2705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: regarding %s\n",
2706 GNUNET_i2s (&msg->peer1));
2707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: regarding %s\n",
2708 GNUNET_i2s (&msg->peer2));
2709 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2712 GNUNET_break_op (0);
2715 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
2716 GNUNET_PEER_search (&msg->peer2));
2723 * Core handler for tunnel destruction
2725 * @param cls closure
2726 * @param message message
2727 * @param peer peer identity this notification is about
2728 * @param atsi performance data
2729 * @param atsi_count number of records in 'atsi'
2731 * @return GNUNET_OK to keep the connection open,
2732 * GNUNET_SYSERR to close it (signal serious error)
2735 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2736 const struct GNUNET_MessageHeader *message,
2737 const struct GNUNET_ATS_Information *atsi,
2738 unsigned int atsi_count)
2740 struct GNUNET_MESH_TunnelDestroy *msg;
2741 struct MeshTunnel *t;
2743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2744 "MESH: Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
2745 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: for tunnel %s [%u]\n",
2747 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
2748 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2751 /* Probably already got the message from another path,
2752 * destroyed the tunnel and retransmitted to children.
2757 if (t->id.oid == myid)
2759 GNUNET_break_op (0);
2762 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2764 /* Tunnel was incoming, notify clients */
2765 send_clients_tunnel_destroy (t);
2767 tunnel_send_destroy (t);
2774 * Core handler for mesh network traffic going from the origin to a peer
2776 * @param cls closure
2777 * @param peer peer identity this notification is about
2778 * @param message message
2779 * @param atsi performance data
2780 * @param atsi_count number of records in 'atsi'
2781 * @return GNUNET_OK to keep the connection open,
2782 * GNUNET_SYSERR to close it (signal serious error)
2785 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2786 const struct GNUNET_MessageHeader *message,
2787 const struct GNUNET_ATS_Information *atsi,
2788 unsigned int atsi_count)
2790 struct GNUNET_MESH_Unicast *msg;
2791 struct MeshTunnel *t;
2795 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got a unicast packet from %s\n",
2797 size = ntohs (message->size);
2799 sizeof (struct GNUNET_MESH_Unicast) +
2800 sizeof (struct GNUNET_MessageHeader))
2805 msg = (struct GNUNET_MESH_Unicast *) message;
2806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: of type %u\n",
2807 ntohs (msg[1].header.type));
2808 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2811 /* TODO notify back: we don't know this tunnel */
2812 GNUNET_break_op (0);
2815 tunnel_reset_timeout (t);
2816 pid = GNUNET_PEER_search (&msg->destination);
2819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2820 "MESH: it's for us! sending to clients...\n");
2821 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2825 "MESH: not for us, retransmitting...\n");
2826 send_message (message, path_get_first_hop (t->tree, pid));
2832 * Core handler for mesh network traffic going from the origin to all peers
2834 * @param cls closure
2835 * @param message message
2836 * @param peer peer identity this notification is about
2837 * @param atsi performance data
2838 * @param atsi_count number of records in 'atsi'
2839 * @return GNUNET_OK to keep the connection open,
2840 * GNUNET_SYSERR to close it (signal serious error)
2842 * TODO: Check who we got this from, to validate route.
2845 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2846 const struct GNUNET_MessageHeader *message,
2847 const struct GNUNET_ATS_Information *atsi,
2848 unsigned int atsi_count)
2850 struct GNUNET_MESH_Multicast *msg;
2851 struct MeshTunnel *t;
2854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got a multicast packet from %s\n",
2856 size = ntohs (message->size);
2857 if (sizeof (struct GNUNET_MESH_Multicast) +
2858 sizeof (struct GNUNET_MessageHeader) > size)
2860 GNUNET_break_op (0);
2863 msg = (struct GNUNET_MESH_Multicast *) message;
2864 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2868 /* TODO notify that we dont know that tunnel */
2869 GNUNET_break_op (0);
2872 tunnel_reset_timeout (t);
2874 /* Transmit to locally interested clients */
2875 if (NULL != t->peers &&
2876 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2878 send_subscribed_clients (message, &msg[1].header);
2880 tunnel_send_multicast (t, message);
2886 * Core handler for mesh network traffic toward the owner of a tunnel
2888 * @param cls closure
2889 * @param message message
2890 * @param peer peer identity this notification is about
2891 * @param atsi performance data
2892 * @param atsi_count number of records in 'atsi'
2894 * @return GNUNET_OK to keep the connection open,
2895 * GNUNET_SYSERR to close it (signal serious error)
2898 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2899 const struct GNUNET_MessageHeader *message,
2900 const struct GNUNET_ATS_Information *atsi,
2901 unsigned int atsi_count)
2903 struct GNUNET_MESH_ToOrigin *msg;
2904 struct GNUNET_PeerIdentity id;
2905 struct MeshPeerInfo *peer_info;
2906 struct MeshTunnel *t;
2909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got a ToOrigin packet from %s\n",
2911 size = ntohs (message->size);
2912 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2913 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2915 GNUNET_break_op (0);
2918 msg = (struct GNUNET_MESH_ToOrigin *) message;
2919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: of type %u\n",
2920 ntohs (msg[1].header.type));
2921 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2925 /* TODO notify that we dont know this tunnel (whom)? */
2926 GNUNET_break_op (0);
2930 if (t->id.oid == myid)
2933 struct GNUNET_MESH_ToOrigin *copy;
2935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2936 "MESH: it's for us! sending to clients...\n");
2937 if (NULL == t->client)
2939 /* got data packet for ownerless tunnel */
2940 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: no clients!\n");
2941 GNUNET_break_op (0);
2944 /* TODO signature verification */
2945 memcpy (cbuf, message, size);
2946 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2947 copy->tid = htonl (t->local_tid);
2948 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
2949 ©->header, GNUNET_YES);
2952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2953 "MESH: not for us, retransmitting...\n");
2955 peer_info = peer_info_get (&msg->oid);
2956 if (NULL == peer_info)
2958 /* unknown origin of tunnel */
2962 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
2963 send_message (message, &id);
2970 * Core handler for path ACKs
2972 * @param cls closure
2973 * @param message message
2974 * @param peer peer identity this notification is about
2975 * @param atsi performance data
2976 * @param atsi_count number of records in 'atsi'
2978 * @return GNUNET_OK to keep the connection open,
2979 * GNUNET_SYSERR to close it (signal serious error)
2982 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2983 const struct GNUNET_MessageHeader *message,
2984 const struct GNUNET_ATS_Information *atsi,
2985 unsigned int atsi_count)
2987 struct GNUNET_MESH_PathACK *msg;
2988 struct GNUNET_PeerIdentity id;
2989 struct MeshPeerInfo *peer_info;
2990 struct MeshTunnel *t;
2992 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Received a path ACK msg [%s]\n",
2993 GNUNET_i2s (&my_full_id));
2994 msg = (struct GNUNET_MESH_PathACK *) message;
2995 t = tunnel_get (&msg->oid, msg->tid);
2998 /* TODO notify that we don't know the tunnel */
3002 /* Message for us? */
3003 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
3006 if (NULL == t->client)
3008 GNUNET_break_op (0);
3011 if (NULL != t->dht_get_type)
3013 GNUNET_DHT_get_stop (t->dht_get_type);
3014 t->dht_get_type = NULL;
3016 peer_info = peer_info_get (&msg->peer_id);
3017 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
3018 send_client_peer_connected (t, peer_info->id);
3022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3023 "MESH: not for us, retransmitting...\n");
3024 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3025 peer_info = peer_info_get (&msg->oid);
3026 if (NULL == peer_info)
3028 /* If we know the tunnel, we should DEFINITELY know the peer */
3032 send_message (message, &id);
3038 * Functions to handle messages from core
3040 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3041 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3042 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3043 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3044 sizeof (struct GNUNET_MESH_PathBroken)},
3045 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3046 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3047 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3048 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3049 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3050 sizeof (struct GNUNET_MESH_PathACK)},
3056 /******************************************************************************/
3057 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3058 /******************************************************************************/
3061 * deregister_app: iterator for removing each application registered by a client
3063 * @param cls closure
3064 * @param key the hash of the application id (used to access the hashmap)
3065 * @param value the value stored at the key (client)
3067 * @return GNUNET_OK on success
3070 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3072 GNUNET_break (GNUNET_YES ==
3073 GNUNET_CONTAINER_multihashmap_remove (applications, key,
3080 * notify_client_connection_failure: notify a client that the connection to the
3081 * requested remote peer is not possible (for instance, no route found)
3082 * Function called when the socket is ready to queue more data. "buf" will be
3083 * NULL and "size" zero if the socket was closed for writing in the meantime.
3085 * @param cls closure
3086 * @param size number of bytes available in buf
3087 * @param buf where the callee should write the message
3088 * @return number of bytes written to buf
3091 notify_client_connection_failure (void *cls, size_t size, void *buf)
3094 struct MeshPeerInfo *peer_info;
3095 struct GNUNET_MESH_PeerControl *msg;
3096 struct GNUNET_PeerIdentity id;
3098 if (0 == size && NULL == buf)
3100 // TODO retry? cancel?
3104 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3105 peer_info = (struct MeshPeerInfo *) cls;
3106 msg = (struct GNUNET_MESH_PeerControl *) buf;
3107 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3108 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3109 // msg->tunnel_id = htonl(peer_info->t->tid);
3110 GNUNET_PEER_resolve (peer_info->id, &id);
3111 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3119 * Send keepalive packets for a peer
3121 * @param cls Closure (tunnel for which to send the keepalive).
3122 * @param tc Notification context.
3124 * TODO: implement explicit multicast keepalive?
3127 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3129 struct MeshTunnel *t = cls;
3130 struct GNUNET_MessageHeader *payload;
3131 struct GNUNET_MESH_Multicast *msg;
3133 sizeof (struct GNUNET_MESH_Multicast) +
3134 sizeof (struct GNUNET_MessageHeader);
3137 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3141 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3144 "MESH: sending keepalive for tunnel %d\n", t->id.tid);
3146 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3147 msg->header.size = htons (size);
3148 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3149 msg->oid = my_full_id;
3150 msg->tid = htonl (t->id.tid);
3151 payload = (struct GNUNET_MessageHeader *) &msg[1];
3152 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
3153 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3154 tunnel_send_multicast (t, &msg->header);
3156 t->path_refresh_task =
3157 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
3163 * Function to process paths received for a new peer addition. The recorded
3164 * paths form the initial tunnel, which can be optimized later.
3165 * Called on each result obtained for the DHT search.
3167 * @param cls closure
3168 * @param exp when will this value expire
3169 * @param key key of the result
3170 * @param type type of the result
3171 * @param size number of bytes in data
3172 * @param data pointer to the result data
3174 * TODO: re-issue the request after certain time? cancel after X results?
3177 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3178 const GNUNET_HashCode * key,
3179 const struct GNUNET_PeerIdentity *get_path,
3180 unsigned int get_path_length,
3181 const struct GNUNET_PeerIdentity *put_path,
3182 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3183 size_t size, const void *data)
3185 struct MeshPathInfo *path_info = cls;
3186 struct MeshPeerPath *p;
3187 struct GNUNET_PeerIdentity pi;
3190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got results from DHT!\n");
3191 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n", GNUNET_i2s (&pi));
3193 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3194 // path_info->peer->dhtget = NULL;
3196 p = path_build_from_dht (get_path, get_path_length, put_path,
3198 peer_info_add_path (path_info->peer, p, GNUNET_NO);
3199 for (i = 0; i < path_info->peer->ntunnels; i++)
3201 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3202 peer_info_connect (path_info->peer, path_info->t);
3204 // GNUNET_free (path_info);
3211 * Function to process paths received for a new peer addition. The recorded
3212 * paths form the initial tunnel, which can be optimized later.
3213 * Called on each result obtained for the DHT search.
3215 * @param cls closure
3216 * @param exp when will this value expire
3217 * @param key key of the result
3218 * @param type type of the result
3219 * @param size number of bytes in data
3220 * @param data pointer to the result data
3223 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3224 const GNUNET_HashCode * key,
3225 const struct GNUNET_PeerIdentity *get_path,
3226 unsigned int get_path_length,
3227 const struct GNUNET_PeerIdentity *put_path,
3228 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3229 size_t size, const void *data)
3231 const struct GNUNET_PeerIdentity *pi = data;
3232 struct MeshTunnel *t = cls;
3233 struct MeshPeerInfo *peer_info;
3234 struct MeshPeerPath *p;
3236 if (size != sizeof (struct GNUNET_PeerIdentity))
3238 GNUNET_break_op (0);
3241 GNUNET_assert (NULL != t->client);
3242 peer_info = peer_info_get (pi);
3243 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
3245 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3247 p = path_build_from_dht (get_path, get_path_length, put_path,
3249 peer_info_add_path (peer_info, p, GNUNET_NO);
3250 tunnel_add_peer (t, peer_info);
3251 peer_info_connect (peer_info, t);
3255 /******************************************************************************/
3256 /********************* MESH LOCAL HANDLES **************************/
3257 /******************************************************************************/
3261 * Handler for client disconnection
3263 * @param cls closure
3264 * @param client identification of the client; NULL
3265 * for the last call when the server is destroyed
3268 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3270 struct MeshClient *c;
3271 struct MeshClient *next;
3273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3276 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3282 if (c->handle != client && NULL != client)
3284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3289 GNUNET_SERVER_client_drop (c->handle);
3290 if (NULL != c->tunnels)
3292 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3293 &tunnel_destroy_iterator, c);
3294 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3297 /* deregister clients applications */
3298 if (NULL != c->apps)
3300 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3301 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3303 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3304 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3306 GNUNET_SCHEDULER_cancel (announce_applications_task);
3307 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3309 if (NULL != c->types)
3310 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3312 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3324 * Handler for new clients
3326 * @param cls closure
3327 * @param client identification of the client
3328 * @param message the actual message, which includes messages the client wants
3331 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3332 const struct GNUNET_MessageHeader *message)
3334 struct GNUNET_MESH_ClientConnect *cc_msg;
3335 struct MeshClient *c;
3336 GNUNET_MESH_ApplicationType *a;
3343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3344 /* Check data sanity */
3345 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3346 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3347 ntypes = ntohs (cc_msg->types);
3348 napps = ntohs (cc_msg->applications);
3350 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3353 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3357 /* Create new client structure */
3358 c = GNUNET_malloc (sizeof (struct MeshClient));
3360 c->id = next_client_id++;
3362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u at %p\n", c->id,
3365 GNUNET_SERVER_client_keep (client);
3366 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3369 GNUNET_MESH_ApplicationType at;
3372 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3373 for (i = 0; i < napps; i++)
3376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3377 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3378 /* store in clients hashmap */
3379 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3380 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3381 /* store in global hashmap, for announcements */
3382 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3383 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3385 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3386 announce_applications_task =
3387 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3395 t = (uint16_t *) & a[napps];
3396 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3397 for (i = 0; i < ntypes; i++)
3400 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3402 /* store in clients hashmap */
3403 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3404 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3405 /* store in global hashmap */
3406 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3407 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3411 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3413 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3414 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3415 GNUNET_SERVER_notification_context_add (nc, client);
3417 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3425 * Handler for requests of new tunnels
3427 * @param cls closure
3428 * @param client identification of the client
3429 * @param message the actual message
3432 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3433 const struct GNUNET_MessageHeader *message)
3435 struct GNUNET_MESH_TunnelMessage *t_msg;
3436 struct MeshTunnel *t;
3437 struct MeshClient *c;
3438 GNUNET_HashCode hash;
3440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3442 /* Sanity check for client registration */
3443 if (NULL == (c = client_get (client)))
3446 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3450 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3453 /* Message sanity check */
3454 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3457 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3461 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3462 /* Sanity check for tunnel numbering */
3463 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3466 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3469 /* Sanity check for duplicate tunnel IDs */
3470 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3473 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3477 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3478 while (NULL != tunnel_get_by_pi (myid, next_tid))
3479 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3480 t->id.tid = next_tid++;
3481 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3483 t->local_tid = ntohl (t_msg->tunnel_id);
3485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3486 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
3489 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3491 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3493 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
3494 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3497 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3501 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3503 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3504 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3507 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3510 t->tree = tree_new (myid);
3511 tree_set_me (t->tree, myid);
3513 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3519 * Handler for requests of deleting tunnels
3521 * @param cls closure
3522 * @param client identification of the client
3523 * @param message the actual message
3526 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3527 const struct GNUNET_MessageHeader *message)
3529 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3530 struct MeshClient *c;
3531 struct MeshTunnel *t;
3532 MESH_TunnelNumber tid;
3533 GNUNET_HashCode hash;
3535 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3536 "MESH: Got a DESTROY TUNNEL from client!\n");
3538 /* Sanity check for client registration */
3539 if (NULL == (c = client_get (client)))
3542 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3545 /* Message sanity check */
3546 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3549 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3555 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3557 /* Retrieve tunnel */
3558 tid = ntohl (tunnel_msg->tunnel_id);
3560 /* Remove from local id hashmap */
3561 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3562 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3563 GNUNET_assert (GNUNET_YES ==
3564 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t));
3567 tunnel_send_destroy (t);
3569 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3575 * Handler for connection requests to new peers
3577 * @param cls closure
3578 * @param client identification of the client
3579 * @param message the actual message (PeerControl)
3582 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3583 const struct GNUNET_MessageHeader *message)
3585 struct GNUNET_MESH_PeerControl *peer_msg;
3586 struct MeshPeerInfo *peer_info;
3587 struct MeshClient *c;
3588 struct MeshTunnel *t;
3589 MESH_TunnelNumber tid;
3591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3592 /* Sanity check for client registration */
3593 if (NULL == (c = client_get (client)))
3596 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3600 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3601 /* Sanity check for message size */
3602 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3605 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3609 /* Tunnel exists? */
3610 tid = ntohl (peer_msg->tunnel_id);
3611 t = tunnel_get_by_local_id (c, tid);
3615 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3619 /* Does client own tunnel? */
3620 if (t->client->handle != client)
3623 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3627 GNUNET_i2s (&peer_msg->peer));
3628 peer_info = peer_info_get (&peer_msg->peer);
3630 tunnel_add_peer (t, peer_info);
3631 peer_info_connect (peer_info, t);
3633 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3639 * Handler for disconnection requests of peers in a tunnel
3641 * @param cls closure
3642 * @param client identification of the client
3643 * @param message the actual message (PeerControl)
3646 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3647 const struct GNUNET_MessageHeader *message)
3649 struct GNUNET_MESH_PeerControl *peer_msg;
3650 struct MeshPeerInfo *peer_info;
3651 struct MeshClient *c;
3652 struct MeshTunnel *t;
3653 MESH_TunnelNumber tid;
3655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3656 /* Sanity check for client registration */
3657 if (NULL == (c = client_get (client)))
3660 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3663 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3664 /* Sanity check for message size */
3665 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3668 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3672 /* Tunnel exists? */
3673 tid = ntohl (peer_msg->tunnel_id);
3674 t = tunnel_get_by_local_id (c, tid);
3678 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3681 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3683 /* Does client own tunnel? */
3684 if (t->client->handle != client)
3687 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: for peer %s\n",
3692 GNUNET_i2s (&peer_msg->peer));
3693 /* Is the peer in the tunnel? */
3695 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
3696 if (NULL == peer_info)
3699 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3703 /* Ok, delete peer from tunnel */
3704 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3705 &peer_msg->peer.hashPubKey);
3707 send_destroy_path (t, peer_info->id);
3708 tunnel_delete_peer (t, peer_info->id);
3709 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3715 * Handler for connection requests to new peers by type
3717 * @param cls closure
3718 * @param client identification of the client
3719 * @param message the actual message (ConnectPeerByType)
3722 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3723 const struct GNUNET_MessageHeader *message)
3725 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3726 struct MeshClient *c;
3727 struct MeshTunnel *t;
3728 GNUNET_HashCode hash;
3729 MESH_TunnelNumber tid;
3731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3732 /* Sanity check for client registration */
3733 if (NULL == (c = client_get (client)))
3736 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3740 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3741 /* Sanity check for message size */
3742 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3743 ntohs (connect_msg->header.size))
3746 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3750 /* Tunnel exists? */
3751 tid = ntohl (connect_msg->tunnel_id);
3752 t = tunnel_get_by_local_id (c, tid);
3756 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3760 /* Does client own tunnel? */
3761 if (t->client->handle != client)
3764 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3768 /* Do WE have the service? */
3769 t->type = ntohl (connect_msg->type);
3770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3771 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3772 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3775 /* Yes! Fast forward, add ourselves to the tunnel and send the
3776 * good news to the client
3778 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3779 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3780 peer_info_get (&my_full_id),
3781 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3784 send_client_peer_connected (t, myid);
3785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3786 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3789 /* Ok, lets find a peer offering the service */
3790 if (NULL != t->dht_get_type)
3792 GNUNET_DHT_get_stop (t->dht_get_type);
3794 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3795 GNUNET_h2s (&hash));
3797 GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
3798 GNUNET_BLOCK_TYPE_TEST, &hash, 10U,
3799 GNUNET_DHT_RO_RECORD_ROUTE |
3800 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, 0,
3801 &dht_get_type_handler, t);
3803 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3809 * Handler for client traffic directed to one peer
3811 * @param cls closure
3812 * @param client identification of the client
3813 * @param message the actual message
3816 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3817 const struct GNUNET_MessageHeader *message)
3819 struct MeshClient *c;
3820 struct MeshTunnel *t;
3821 struct MeshPeerInfo *pi;
3822 struct GNUNET_MESH_Unicast *data_msg;
3823 MESH_TunnelNumber tid;
3826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3827 "MESH: Got a unicast request from a client!\n");
3829 /* Sanity check for client registration */
3830 if (NULL == (c = client_get (client)))
3833 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3836 data_msg = (struct GNUNET_MESH_Unicast *) message;
3837 /* Sanity check for message size */
3838 size = ntohs (message->size);
3839 if (sizeof (struct GNUNET_MESH_Unicast) +
3840 sizeof (struct GNUNET_MessageHeader) > size)
3843 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3847 /* Tunnel exists? */
3848 tid = ntohl (data_msg->tid);
3849 t = tunnel_get_by_local_id (c, tid);
3853 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3857 /* Is it a local tunnel? Then, does client own the tunnel? */
3858 if (NULL != t->client && NULL != t->client->handle &&
3859 t->client->handle != client)
3862 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3866 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3867 &data_msg->destination.hashPubKey);
3868 /* Is the selected peer in the tunnel? */
3872 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3876 /* Ok, everything is correct, send the message
3877 * (pretend we got it from a mesh peer)
3880 char buf[ntohs (message->size)];
3881 struct GNUNET_MESH_Unicast *copy;
3883 /* Work around const limitation */
3884 copy = (struct GNUNET_MESH_Unicast *) buf;
3885 memcpy (buf, data_msg, size);
3886 copy->oid = my_full_id;
3887 copy->tid = htonl (t->id.tid);
3888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3889 "MESH: calling generic handler...\n");
3890 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3892 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3898 * Handler for client traffic directed to the origin
3900 * @param cls closure
3901 * @param client identification of the client
3902 * @param message the actual message
3905 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3906 const struct GNUNET_MessageHeader *message)
3908 struct GNUNET_MESH_ToOrigin *data_msg;
3909 struct GNUNET_PeerIdentity id;
3910 struct MeshClient *c;
3911 struct MeshTunnel *t;
3912 MESH_TunnelNumber tid;
3915 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3916 "MESH: Got a ToOrigin 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_ToOrigin *) message;
3926 /* Sanity check for message size */
3927 size = ntohs (message->size);
3928 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3929 sizeof (struct GNUNET_MessageHeader) > size)
3932 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3936 /* Tunnel exists? */
3937 tid = ntohl (data_msg->tid);
3938 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3941 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3944 t = tunnel_get_by_local_id (c, tid);
3948 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3952 /* It shouldn't be a local tunnel. */
3953 if (NULL != t->client)
3956 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3959 GNUNET_PEER_resolve (t->id.oid, &id);
3961 /* Ok, everything is correct, send the message
3962 * (pretend we got it from a mesh peer)
3965 char buf[ntohs (message->size)];
3966 struct GNUNET_MESH_ToOrigin *copy;
3968 /* Work around const limitation */
3969 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3970 memcpy (buf, data_msg, size);
3972 copy->tid = htonl (t->id.tid);
3973 copy->sender = my_full_id;
3974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3975 "MESH: calling generic handler...\n");
3976 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3978 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3984 * Handler for client traffic directed to all peers in a tunnel
3986 * @param cls closure
3987 * @param client identification of the client
3988 * @param message the actual message
3991 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3992 const struct GNUNET_MessageHeader *message)
3994 struct MeshClient *c;
3995 struct MeshTunnel *t;
3996 struct GNUNET_MESH_Multicast *data_msg;
3997 MESH_TunnelNumber tid;
3999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4000 "MESH: Got a multicast request from a client!\n");
4002 /* Sanity check for client registration */
4003 if (NULL == (c = client_get (client)))
4006 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4009 data_msg = (struct GNUNET_MESH_Multicast *) message;
4010 /* Sanity check for message size */
4011 if (sizeof (struct GNUNET_MESH_Multicast) +
4012 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4015 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4019 /* Tunnel exists? */
4020 tid = ntohl (data_msg->tid);
4021 t = tunnel_get_by_local_id (c, tid);
4025 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4029 /* Does client own tunnel? */
4030 if (t->client->handle != client)
4033 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4038 char buf[ntohs (message->size)];
4039 struct GNUNET_MESH_Multicast *copy;
4041 copy = (struct GNUNET_MESH_Multicast *) buf;
4042 memcpy (buf, message, ntohs (message->size));
4043 copy->oid = my_full_id;
4044 copy->tid = htonl (t->id.tid);
4045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4046 "MESH: calling generic handler...\n");
4047 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
4050 /* receive done gets called when last copy is sent to a neighbor */
4055 * Functions to handle messages from clients
4057 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4058 {&handle_local_new_client, NULL,
4059 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4060 {&handle_local_tunnel_create, NULL,
4061 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4062 sizeof (struct GNUNET_MESH_TunnelMessage)},
4063 {&handle_local_tunnel_destroy, NULL,
4064 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4065 sizeof (struct GNUNET_MESH_TunnelMessage)},
4066 {&handle_local_connect_add, NULL,
4067 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4068 sizeof (struct GNUNET_MESH_PeerControl)},
4069 {&handle_local_connect_del, NULL,
4070 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4071 sizeof (struct GNUNET_MESH_PeerControl)},
4072 {&handle_local_connect_by_type, NULL,
4073 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4074 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4075 {&handle_local_unicast, NULL,
4076 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4077 {&handle_local_to_origin, NULL,
4078 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4079 {&handle_local_multicast, NULL,
4080 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4086 * To be called on core init/fail.
4088 * @param cls service closure
4089 * @param server handle to the server for this service
4090 * @param identity the public identity of this peer
4093 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4094 const struct GNUNET_PeerIdentity *identity)
4096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4097 core_handle = server;
4098 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4101 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4102 GNUNET_SCHEDULER_shutdown ();
4108 * Method called whenever a given peer connects.
4110 * @param cls closure
4111 * @param peer peer identity this notification is about
4112 * @param atsi performance data for the connection
4113 * @param atsi_count number of records in 'atsi'
4116 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4117 const struct GNUNET_ATS_Information *atsi,
4118 unsigned int atsi_count)
4120 struct MeshPeerInfo *peer_info;
4121 struct MeshPeerPath *path;
4123 #if MESH_DEBUG_CONNECTION
4124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
4125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4126 GNUNET_i2s (&my_full_id));
4128 peer_info = peer_info_get (peer);
4129 if (myid == peer_info->id)
4131 #if MESH_DEBUG_CONNECTION
4132 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4136 #if MESH_DEBUG_CONNECTION
4139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", GNUNET_i2s (peer));
4142 path = path_new (2);
4143 path->peers[0] = myid;
4144 path->peers[1] = peer_info->id;
4145 GNUNET_PEER_change_rc (myid, 1);
4146 GNUNET_PEER_change_rc (peer_info->id, 1);
4147 peer_info_add_path (peer_info, path, GNUNET_YES);
4152 * Method called whenever a peer disconnects.
4154 * @param cls closure
4155 * @param peer peer identity this notification is about
4158 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4160 struct MeshPeerInfo *pi;
4163 #if MESH_DEBUG_CONNECTION
4164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4166 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4172 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4174 /* TODO: notify that the transmission failed */
4175 peer_info_cancel_transmission (pi, i);
4177 peer_info_remove_path (pi, pi->id, myid);
4178 #if MESH_DEBUG_CONNECTION
4181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4188 /******************************************************************************/
4189 /************************ MAIN FUNCTIONS ****************************/
4190 /******************************************************************************/
4193 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4195 * @param cls closure
4196 * @param key current key code
4197 * @param value value in the hash map
4198 * @return GNUNET_YES if we should continue to iterate,
4202 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4204 struct MeshTunnel *t = value;
4211 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4213 * @param cls closure
4214 * @param key current key code
4215 * @param value value in the hash map
4216 * @return GNUNET_YES if we should continue to iterate,
4220 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4222 struct MeshPeerInfo *p = value;
4224 peer_info_destroy (p);
4229 * Task run during shutdown.
4235 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4238 /* TODO: destroy tunnels? */
4239 if (core_handle != NULL)
4241 GNUNET_CORE_disconnect (core_handle);
4244 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4245 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4246 if (dht_handle != NULL)
4248 GNUNET_DHT_disconnect (dht_handle);
4253 GNUNET_SERVER_notification_context_destroy (nc);
4256 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4258 GNUNET_SCHEDULER_cancel (announce_id_task);
4259 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4265 * Process mesh requests.
4267 * @param cls closure
4268 * @param server the initialized server
4269 * @param c configuration to use
4272 run (void *cls, struct GNUNET_SERVER_Handle *server,
4273 const struct GNUNET_CONFIGURATION_Handle *c)
4275 struct MeshPeerInfo *peer;
4276 struct MeshPeerPath *p;
4279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4280 server_handle = server;
4281 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4282 CORE_QUEUE_SIZE, /* queue size */
4283 NULL, /* Closure passed to MESH functions */
4284 &core_init, /* Call core_init once connected */
4285 &core_connect, /* Handle connects */
4286 &core_disconnect, /* remove peers on disconnects */
4287 NULL, /* Don't notify about all incoming messages */
4288 GNUNET_NO, /* For header only in notification */
4289 NULL, /* Don't notify about all outbound messages */
4290 GNUNET_NO, /* For header-only out notification */
4291 core_handlers); /* Register these handlers */
4293 if (core_handle == NULL)
4296 GNUNET_SCHEDULER_shutdown ();
4301 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4304 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4306 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4307 GNUNET_SCHEDULER_shutdown ();
4310 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4311 GNUNET_free (keyfile);
4312 if (my_private_key == NULL)
4314 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4315 _("Mesh service could not access hostkey. Exiting.\n"));
4316 GNUNET_SCHEDULER_shutdown ();
4319 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4320 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4321 &my_full_id.hashPubKey);
4322 myid = GNUNET_PEER_intern (&my_full_id);
4324 // // transport_handle = GNUNET_TRANSPORT_connect(c,
4331 dht_handle = GNUNET_DHT_connect (c, 64);
4332 if (dht_handle == NULL)
4338 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4340 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4341 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4342 peers = GNUNET_CONTAINER_multihashmap_create (32);
4343 applications = GNUNET_CONTAINER_multihashmap_create (32);
4344 types = GNUNET_CONTAINER_multihashmap_create (32);
4346 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4347 nc = GNUNET_SERVER_notification_context_create (server_handle,
4349 GNUNET_SERVER_disconnect_notify (server_handle,
4350 &handle_local_client_disconnect, NULL);
4354 clients_tail = NULL;
4359 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4360 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4362 /* Create a peer_info for the local peer */
4363 peer = peer_info_get (&my_full_id);
4366 GNUNET_PEER_change_rc (myid, 1);
4367 peer_info_add_path (peer, p, GNUNET_YES);
4369 /* Scheduled the task to clean up when shutdown is called */
4370 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4377 * The main function for the mesh service.
4379 * @param argc number of arguments from the command line
4380 * @param argv command line arguments
4381 * @return 0 ok, 1 on error
4384 main (int argc, char *const *argv)
4388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4391 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");