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
44 * - set ttl relative to tree depth
50 #include "mesh_protocol.h"
51 #include "gnunet_dht_service.h"
52 #include "mesh_tunnel_tree.h"
54 /* TODO: move into configuration file */
55 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
56 GNUNET_TIME_UNIT_SECONDS,\
58 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
59 GNUNET_TIME_UNIT_SECONDS,\
62 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
63 GNUNET_TIME_UNIT_SECONDS,\
66 #define UNACKNOWLEDGED_WAIT GNUNET_TIME_relative_multiply(\
67 GNUNET_TIME_UNIT_SECONDS,\
69 #define DEFAULT_TTL 64
73 #define MESH_DEBUG_DHT GNUNET_YES
74 #define MESH_DEBUG_CONNECTION GNUNET_NO
76 #if MESH_DEBUG_CONNECTION
77 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
79 #define DEBUG_CONN(...)
83 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
85 #define DEBUG_DHT(...)
88 /******************************************************************************/
89 /************************ DATA STRUCTURES ****************************/
90 /******************************************************************************/
92 /** FWD declaration */
97 * Struct representing a piece of data being sent to other peers
101 /** Tunnel it belongs to. */
102 struct MeshTunnel *t;
104 /** In case of a multicast, task to allow a client to send more data if
105 * some neighbor is too slow. */
106 GNUNET_SCHEDULER_TaskIdentifier *task;
108 /** How many remaining neighbors we need to send this to. */
109 unsigned int *reference_counter;
111 /** Size of the data. */
120 * Struct containing all info possibly needed to build a package when called
123 struct MeshTransmissionDescriptor
125 /** ID of the tunnel this packet travels in */
126 struct MESH_TunnelID *origin;
128 /** Who was this message being sent to */
129 struct MeshPeerInfo *peer;
131 /** Ultimate destination of the packet */
132 GNUNET_PEER_Id destination;
134 /** Which handler was used to request the transmission */
135 unsigned int handler_n;
137 /** Data descriptor */
138 struct MeshData* mesh_data;
143 * Struct containing all information regarding a given peer
153 * Last time we heard from this peer
155 struct GNUNET_TIME_Absolute last_contact;
158 * Number of attempts to reconnect so far
160 int n_reconnect_attempts;
163 * Paths to reach the peer, ordered by ascending hop count
165 struct MeshPeerPath *path_head;
168 * Paths to reach the peer, ordered by ascending hop count
170 struct MeshPeerPath *path_tail;
173 * Handle to stop the DHT search for a path to this peer
175 struct GNUNET_DHT_GetHandle *dhtget;
178 * Closure given to the DHT GET
180 struct MeshPathInfo *dhtgetcls;
183 * Handles to stop queued transmissions for this peer
185 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
188 * Pointer to info stuctures used as cls for queued transmissions
190 void *infos[CORE_QUEUE_SIZE];
193 * Type of message being in each transmission
195 uint16_t types[CORE_QUEUE_SIZE];
198 * Array of tunnels this peer participates in
199 * (most probably a small amount, therefore not a hashmap)
200 * When the path to the peer changes, notify these tunnels to let them
201 * re-adjust their path trees.
203 struct MeshTunnel **tunnels;
206 * Number of tunnels this peers participates in
208 unsigned int ntunnels;
213 * Data scheduled to transmit (to local client or remote peer)
220 struct MeshQueue *next;
221 struct MeshQueue *prev;
224 * Target of the data (NULL if target is client)
226 struct MeshPeerInfo *peer;
229 * Client to send the data to (NULL if target is peer)
231 struct MeshClient *client;
234 * Size of the message to transmit
239 * How old is the data?
241 struct GNUNET_TIME_Absolute timestamp;
246 struct GNUNET_MessageHeader *data;
250 * Globally unique tunnel identification (owner + number)
251 * DO NOT USE OVER THE NETWORK
256 * Node that owns the tunnel
261 * Tunnel number to differentiate all the tunnels owned by the node oid
262 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
264 MESH_TunnelNumber tid;
268 struct MeshClient; /* FWD declaration */
271 * Struct containing all information regarding a tunnel
272 * For an intermediate node the improtant info used will be:
273 * - id Tunnel unique identification
274 * - paths[0] To know where to send it next
275 * - metainfo: ready, speeds, accounting
282 struct MESH_TunnelID id;
285 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
287 MESH_TunnelNumber local_tid;
290 * Local tunnel number for local destination clients (incoming number)
291 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
294 MESH_TunnelNumber local_tid_dest;
297 * ID of the last multicast packet seen/sent.
302 * Last time the tunnel was used
304 struct GNUNET_TIME_Absolute timestamp;
307 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
308 * containing peers added by id or by type, not intermediate peers.
310 struct GNUNET_CONTAINER_MultiHashMap *peers;
313 * Number of peers that are connected and potentially ready to receive data
315 unsigned int peers_ready;
318 * Number of peers that have been added to the tunnel
320 unsigned int peers_total;
323 * Client owner of the tunnel, if any
325 struct MeshClient *owner;
328 * Clients that have been informed about the tunnel, if any
330 struct MeshClient **clients;
333 * Number of elements in clients
335 unsigned int nclients;
338 * Clients that have requested to leave the tunnel
340 struct MeshClient **ignore;
343 * Number of elements in clients
345 unsigned int nignore;
348 * Messages ready to transmit
350 struct MeshQueue *queue_head;
351 struct MeshQueue *queue_tail;
356 struct MeshTunnelTree *tree;
359 * Application type we are looking for in this tunnel
361 GNUNET_MESH_ApplicationType type;
364 * Used to search peers offering a service
366 struct GNUNET_DHT_GetHandle *dht_get_type;
369 * Task to keep the used paths alive
371 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
374 * Task to destroy the tunnel after timeout
376 * FIXME: merge the two? a tunnel will have either
377 * a path refresh OR a timeout, never both!
379 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
384 * Info needed to work with tunnel paths and peers
391 struct MeshTunnel *t;
394 * Neighbouring peer to whom we send the packet to
396 struct MeshPeerInfo *peer;
401 struct MeshPeerPath *path;
404 * Position in peer's transmit queue
411 * Struct containing information about a client of the service
418 struct MeshClient *next;
423 struct MeshClient *prev;
426 * Tunnels that belong to this client, indexed by local id
428 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
431 * Tunnels this client has accepted, indexed by incoming local id
433 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
436 * Tunnels this client has rejected, indexed by incoming local id
438 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
440 * Handle to communicate with the client
442 struct GNUNET_SERVER_Client *handle;
445 * Applications that this client has claimed to provide
447 struct GNUNET_CONTAINER_MultiHashMap *apps;
450 * Messages that this client has declared interest in
452 struct GNUNET_CONTAINER_MultiHashMap *types;
455 * Whether the client is active or shutting down (don't send confirmations
456 * to a client that is shutting down.
461 * ID of the client, mainly for debug messages
469 /******************************************************************************/
470 /************************ DEBUG FUNCTIONS ****************************/
471 /******************************************************************************/
475 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
476 * @param cls string to print
477 * @param success GNUNET_OK if the PUT was transmitted,
478 * GNUNET_NO on timeout,
479 * GNUNET_SYSERR on disconnect from service
480 * after the PUT message was transmitted
481 * (so we don't know if it was received or not)
484 mesh_debug (void *cls, int success)
488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
492 /******************************************************************************/
493 /*********************** GLOBAL VARIABLES ****************************/
494 /******************************************************************************/
499 static struct MeshClient *clients;
500 static struct MeshClient *clients_tail;
503 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
505 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
508 * Tunnels incoming, indexed by MESH_TunnelNumber
509 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
511 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
514 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
516 static struct GNUNET_CONTAINER_MultiHashMap *peers;
519 * Handle to communicate with core
521 static struct GNUNET_CORE_Handle *core_handle;
524 * Handle to communicate with transport
526 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
531 static struct GNUNET_DHT_Handle *dht_handle;
536 static struct GNUNET_SERVER_Handle *server_handle;
539 * Notification context, to send messages to local clients
541 static struct GNUNET_SERVER_NotificationContext *nc;
544 * Local peer own ID (memory efficient handle)
546 static GNUNET_PEER_Id myid;
549 * Local peer own ID (full value)
551 static struct GNUNET_PeerIdentity my_full_id;
556 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
561 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
564 * Tunnel ID for the next created tunnel (global tunnel number)
566 static MESH_TunnelNumber next_tid;
569 * Tunnel ID for the next incoming tunnel (local tunnel number)
571 static MESH_TunnelNumber next_local_tid;
574 * All application types provided by this peer
576 static struct GNUNET_CONTAINER_MultiHashMap *applications;
579 * All message types clients of this peer are interested in
581 static struct GNUNET_CONTAINER_MultiHashMap *types;
584 * Task to periodically announce provided applications
586 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
589 * Task to periodically announce itself in the network
591 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
594 * Next ID to assign to a client
596 unsigned int next_client_id;
600 /******************************************************************************/
601 /************************ ITERATORS ****************************/
602 /******************************************************************************/
604 /* FIXME move iterators here */
607 /******************************************************************************/
608 /************************ PERIODIC FUNCTIONS ****************************/
609 /******************************************************************************/
612 * Announce iterator over for each application provided by the peer
615 * @param key current key code
616 * @param value value in the hash map
617 * @return GNUNET_YES if we should continue to
622 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
624 /* FIXME are hashes in multihash map equal on all aquitectures? */
625 /* FIXME: keep return value of 'put' to possibly cancel!? */
626 GNUNET_DHT_put (dht_handle, key, 10U,
627 GNUNET_DHT_RO_RECORD_ROUTE |
628 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, GNUNET_BLOCK_TYPE_TEST,
629 sizeof (struct GNUNET_PeerIdentity),
630 (const char *) &my_full_id,
632 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
633 &mesh_debug, "DHT_put for app completed");
635 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
637 APP_ANNOUNCE_TIME, NULL, NULL);
644 * Periodically announce what applications are provided by local clients
647 * @param tc task context
650 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
652 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
654 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
658 DEBUG_DHT ("Starting PUT for apps\n");
660 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
662 announce_applications_task =
663 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
665 DEBUG_DHT ("Finished PUT for apps\n");
672 * Periodically announce self id in the DHT
675 * @param tc task context
678 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
680 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
682 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
686 * - Set data expiration in function of X
689 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
691 GNUNET_DHT_put (dht_handle, /* DHT handle */
692 &my_full_id.hashPubKey, /* Key to use */
693 10U, /* Replication level */
694 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
695 GNUNET_BLOCK_TYPE_TEST, /* Block type */
696 sizeof (my_full_id), /* Size of the data */
697 (char *) &my_full_id, /* Data itself */
698 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
699 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
701 &mesh_debug, "DHT_put for id completed");
703 NULL, /* Continuation */
704 NULL); /* Continuation closure */
707 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
712 * Function to process paths received for a new peer addition. The recorded
713 * paths form the initial tunnel, which can be optimized later.
714 * Called on each result obtained for the DHT search.
717 * @param exp when will this value expire
718 * @param key key of the result
719 * @param type type of the result
720 * @param size number of bytes in data
721 * @param data pointer to the result data
724 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
725 const GNUNET_HashCode * key,
726 const struct GNUNET_PeerIdentity *get_path,
727 unsigned int get_path_length,
728 const struct GNUNET_PeerIdentity *put_path,
729 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
730 size_t size, const void *data);
733 /******************************************************************************/
734 /****************** GENERAL HELPER FUNCTIONS ************************/
735 /******************************************************************************/
738 * Search for a tunnel by global ID using full PeerIdentities
740 * @param oid owner of the tunnel
741 * @param tid global tunnel number
743 * @return tunnel handler, NULL if doesn't exist
745 static struct MeshTunnel *
746 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
750 * Delete an active client from the tunnel.
756 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
759 * Notify a tunnel that a connection has broken that affects at least
762 * @param t Tunnel affected.
763 * @param p1 Peer that got disconnected from p2.
764 * @param p2 Peer that got disconnected from p1.
766 * @return Short ID of the peer disconnected (either p1 or p2).
767 * 0 if the tunnel remained unaffected.
769 static GNUNET_PEER_Id
770 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
775 * Check if client has registered with the service and has not disconnected
777 * @param client the client to check
779 * @return non-NULL if client exists in the global DLL
781 static struct MeshClient *
782 client_get (struct GNUNET_SERVER_Client *client)
784 struct MeshClient *c;
789 if (c->handle == client)
798 * Checks if a given client has subscribed to certain message type
800 * @param message_type Type of message to check
801 * @param c Client to check
803 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
808 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
812 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
813 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
818 * Allow a client to send more data after transmitting a multicast message
819 * which some neighbor has not yet accepted altough a reasonable time has
822 * @param cls Closure (DataDescriptor containing the task identifier)
823 * @param tc Task Context
825 * FIXME reference counter cshould be just int
828 client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
830 struct MeshData *mdata = cls;
832 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
834 GNUNET_assert (NULL != mdata->reference_counter);
835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
836 "CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
837 *(mdata->reference_counter));
838 *(mdata->task) = GNUNET_SCHEDULER_NO_TASK;
839 GNUNET_SERVER_receive_done (mdata->t->owner->handle, GNUNET_OK);
844 * Check whether client wants traffic from a tunnel.
846 * @param c Client to check.
847 * @param t Tunnel to be found.
849 * @return GNUNET_YES if client knows tunnel.
851 * TODO look in client hashmap
854 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
858 for (i = 0; i < t->nclients; i++)
859 if (t->clients[i] == c)
866 * Check whether client has been informed about a tunnel.
868 * @param c Client to check.
869 * @param t Tunnel to be found.
871 * @return GNUNET_YES if client knows tunnel.
873 * TODO look in client hashmap
876 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
880 for (i = 0; i < t->nignore; i++)
881 if (t->ignore[i] == c)
883 return client_wants_tunnel(c, t);
888 * Marks a client as uninterested in traffic from the tunnel, updating both
889 * client and tunnel to reflect this.
891 * @param c Client that doesn't want traffic anymore.
892 * @param t Tunnel which should be ignored.
894 * FIXME when to delete an incoming tunnel?
897 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
899 GNUNET_HashCode hash;
901 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
902 GNUNET_break (GNUNET_YES ==
903 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
905 GNUNET_break (GNUNET_YES ==
906 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
907 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
908 tunnel_delete_active_client (t, c);
909 GNUNET_array_append (t->ignore, t->nignore, c);
914 * Deletes a tunnel from a client (either owner or destination). To be used on
915 * tunnel destroy, otherwise, use client_ignore_tunnel.
917 * @param c Client whose tunnel to delete.
918 * @param t Tunnel which should be deleted.
921 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
923 GNUNET_HashCode hash;
927 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
928 GNUNET_assert (GNUNET_YES ==
929 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
935 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
937 GNUNET_assert (GNUNET_YES ==
938 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
942 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
951 * Send the message to all clients that have subscribed to its type
953 * @param msg Pointer to the message itself
954 * @param payload Pointer to the payload of the message.
955 * @return number of clients this message was sent to
958 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
959 const struct GNUNET_MessageHeader *payload)
961 struct GNUNET_PeerIdentity *oid;
962 struct MeshClient *c;
963 struct MeshTunnel *t;
964 MESH_TunnelNumber *tid;
967 char cbuf[htons (msg->size)];
969 type = ntohs (payload->type);
970 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %u\n", type);
973 memcpy (cbuf, msg, sizeof (cbuf));
974 switch (htons (msg->type))
976 struct GNUNET_MESH_Unicast *uc;
977 struct GNUNET_MESH_Multicast *mc;
978 struct GNUNET_MESH_ToOrigin *to;
980 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
981 uc = (struct GNUNET_MESH_Unicast *) cbuf;
985 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
986 mc = (struct GNUNET_MESH_Multicast *) cbuf;
990 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
991 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
999 t = tunnel_get (oid, ntohl (*tid));
1006 for (count = 0, c = clients; c != NULL; c = c->next)
1008 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
1009 if (client_is_subscribed (type, c))
1011 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
1015 *tid = htonl (t->local_tid);
1019 if (GNUNET_NO == client_knows_tunnel (c, t))
1021 /* This client doesn't know the tunnel */
1022 struct GNUNET_MESH_TunnelNotification tmsg;
1023 GNUNET_HashCode hash;
1025 tmsg.header.size = htons (sizeof (tmsg));
1026 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1027 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
1028 tmsg.tunnel_id = htonl (t->local_tid_dest);
1029 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1030 &tmsg.header, GNUNET_NO);
1031 GNUNET_array_append (t->clients, t->nclients, c);
1032 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1034 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
1035 c->incoming_tunnels, &hash, t,
1036 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1038 *tid = htonl (t->local_tid_dest);
1041 /* Check if the client wants to get traffic from the tunnel */
1042 if (GNUNET_NO == client_wants_tunnel(c, t))
1045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
1046 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1047 (struct GNUNET_MessageHeader
1048 *) cbuf, GNUNET_YES);
1056 * Notify the client that owns the tunnel that a peer has connected to it
1057 * (the requested path to it has been confirmed).
1059 * @param t Tunnel whose owner to notify
1060 * @param id Short id of the peer that has connected
1063 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
1065 struct GNUNET_MESH_PeerControl pc;
1067 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1068 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1069 pc.tunnel_id = htonl (t->local_tid);
1070 GNUNET_PEER_resolve (id, &pc.peer);
1071 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
1077 * Notify all clients (not depending on registration status) that the incoming
1078 * tunnel is no longer valid.
1080 * @param t Tunnel that was destroyed.
1083 send_clients_tunnel_destroy (struct MeshTunnel *t)
1085 struct GNUNET_MESH_TunnelMessage msg;
1087 msg.header.size = htons (sizeof (msg));
1088 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1089 msg.tunnel_id = htonl (t->local_tid_dest);
1090 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
1095 * Notify clients of tunnel disconnections, if needed.
1096 * In case the origin disconnects, the destination clients get a tunnel destroy
1097 * notification. If the last destination disconnects (only one remaining client
1098 * in tunnel), the origin gets a (local ID) peer disconnected.
1099 * Note that the function must be called BEFORE removing the client from
1102 * @param t Tunnel that was destroyed.
1103 * @param c Client that disconnected.
1106 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
1112 struct GNUNET_MESH_TunnelMessage msg;
1114 msg.header.size = htons (sizeof (msg));
1115 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1116 msg.tunnel_id = htonl (t->local_tid_dest);
1117 for (i = 0; i < t->nclients; i++)
1118 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
1119 &msg.header, GNUNET_NO);
1121 // FIXME when to disconnect an incoming tunnel?
1122 else if (1 == t->nclients && NULL != t->owner)
1124 struct GNUNET_MESH_PeerControl msg;
1126 msg.header.size = htons (sizeof (msg));
1127 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1128 msg.tunnel_id = htonl (t->local_tid);
1129 msg.peer = my_full_id;
1130 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
1131 &msg.header, GNUNET_NO);
1137 * Function called to notify a client about the socket
1138 * being ready to queue more data. "buf" will be
1139 * NULL and "size" zero if the socket was closed for
1140 * writing in the meantime.
1142 * @param cls closure
1143 * @param size number of bytes available in buf
1144 * @param buf where the callee should write the message
1145 * @return number of bytes written to buf
1148 send_core_create_path (void *cls, size_t size, void *buf);
1152 * Function called to notify a client about the socket
1153 * being ready to queue more data. "buf" will be
1154 * NULL and "size" zero if the socket was closed for
1155 * writing in the meantime.
1157 * @param cls closure (data itself)
1158 * @param size number of bytes available in buf
1159 * @param buf where the callee should write the message
1161 * @return number of bytes written to buf
1164 send_core_data_multicast (void *cls, size_t size, void *buf);
1168 * Decrements the reference counter and frees all resources if needed
1170 * @param mesh_data Data Descriptor used in a multicast message.
1171 * Freed no longer needed (last message).
1174 data_descriptor_decrement_multicast (struct MeshData *mesh_data)
1176 /* Make sure it's a multicast packet */
1177 GNUNET_assert (NULL != mesh_data->reference_counter);
1179 if (0 == --(*(mesh_data->reference_counter)))
1181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1182 if (NULL != mesh_data->task)
1184 if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
1186 GNUNET_SCHEDULER_cancel (*(mesh_data->task));
1187 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client...\n");
1188 GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
1190 GNUNET_free (mesh_data->task);
1192 GNUNET_free (mesh_data->reference_counter);
1193 GNUNET_free (mesh_data->data);
1194 GNUNET_free (mesh_data);
1200 * Cancel a core transmission that was already requested and free all resources
1201 * associated to the request.
1203 * @param peer PeeInfo of the peer whose transmission is cancelled.
1204 * @param i Position of the transmission to be cancelled.
1207 peer_info_cancel_transmission (struct MeshPeerInfo *peer, unsigned int i)
1209 if (NULL != peer->core_transmit[i])
1211 struct MeshTransmissionDescriptor *dd;
1212 struct MeshPathInfo *path_info;
1216 struct GNUNET_PeerIdentity id;
1218 GNUNET_PEER_resolve (peer->id, &id);
1219 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1220 " Cancelling data transmission at %s [%u]\n",
1221 GNUNET_i2s (&id), i);
1222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " message type %u\n",
1226 /* TODO: notify that tranmission has failed */
1227 switch (peer->types[i])
1229 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
1230 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1231 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
1233 dd = peer->infos[i];
1234 data_descriptor_decrement_multicast (dd->mesh_data);
1236 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
1237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
1238 path_info = peer->infos[i];
1239 path_destroy (path_info->path);
1243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
1245 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
1246 peer->core_transmit[i] = NULL;
1247 GNUNET_free (peer->infos[i]);
1253 * Get a unused CORE slot to transmit a message to a peer. If all the slots
1254 * are used, cancel one and return it's position.
1256 * @param peer PeerInfo of the neighbor we want to transmit to.
1258 * @return The index of an available slot to transmit to the neighbor.
1261 peer_info_transmit_slot (struct MeshPeerInfo *peer)
1265 for (i = 0; peer->core_transmit[i]; i++)
1267 if (i == (CORE_QUEUE_SIZE - 1))
1269 /* All positions are taken! Overwriting! */
1271 peer_info_cancel_transmission (peer, 0);
1280 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1281 * and insert it in the appropiate structures if the peer is not known yet.
1283 * @param peer Full identity of the peer.
1285 * @return Existing or newly created peer info.
1287 static struct MeshPeerInfo *
1288 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1290 struct MeshPeerInfo *peer_info;
1292 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1293 if (NULL == peer_info)
1296 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1297 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1298 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1299 peer_info->id = GNUNET_PEER_intern (peer);
1307 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1308 * and insert it in the appropiate structures if the peer is not known yet.
1310 * @param peer Short identity of the peer.
1312 * @return Existing or newly created peer info.
1314 static struct MeshPeerInfo *
1315 peer_info_get_short (const GNUNET_PEER_Id peer)
1317 struct GNUNET_PeerIdentity id;
1319 GNUNET_PEER_resolve (peer, &id);
1320 return peer_info_get (&id);
1325 * Iterator to remove the tunnel from the list of tunnels a peer participates
1328 * @param cls Closure (tunnel info)
1329 * @param key GNUNET_PeerIdentity of the peer (unused)
1330 * @param value PeerInfo of the peer
1332 * @return always GNUNET_YES, to keep iterating
1335 peer_info_delete_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
1337 struct MeshTunnel *t = cls;
1338 struct MeshPeerInfo *peer = value;
1341 for (i = 0; i < peer->ntunnels; i++)
1344 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1347 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1348 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1357 * Core callback to write a
1359 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1360 * @param size Number of bytes available in buf.
1361 * @param buf Where the to write the message.
1363 * @return number of bytes written to buf
1366 send_core_data_raw (void *cls, size_t size, void *buf)
1368 struct MeshTransmissionDescriptor *info = cls;
1369 struct GNUNET_MessageHeader *msg;
1372 GNUNET_assert (NULL != info);
1373 GNUNET_assert (NULL != info->mesh_data);
1374 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
1375 total_size = ntohs (msg->size);
1377 if (total_size > size)
1379 struct GNUNET_PeerIdentity id;
1381 GNUNET_PEER_resolve (info->peer->id, &id);
1382 info->peer->core_transmit[info->handler_n] =
1383 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1384 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1385 size, &send_core_data_raw, info);
1388 info->peer->core_transmit[info->handler_n] = NULL;
1389 memcpy (buf, msg, total_size);
1390 GNUNET_free (info->mesh_data);
1397 * Sends an already built message to a peer, properly registrating
1398 * all used resources.
1400 * @param message Message to send. Fucntion makes a copy of it.
1401 * @param peer Short ID of the neighbor whom to send the message.
1406 send_message (const struct GNUNET_MessageHeader *message,
1407 const struct GNUNET_PeerIdentity *peer)
1409 struct MeshTransmissionDescriptor *info;
1410 struct MeshPeerInfo *neighbor;
1411 struct MeshPeerPath *p;
1415 // GNUNET_TRANSPORT_try_connect();
1417 size = ntohs (message->size);
1418 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
1419 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
1420 info->mesh_data->data = GNUNET_malloc (size);
1421 memcpy (info->mesh_data->data, message, size);
1422 info->mesh_data->data_len = size;
1423 neighbor = peer_info_get (peer);
1424 for (p = neighbor->path_head; NULL != p; p = p->next)
1434 GNUNET_free (info->mesh_data->data);
1435 GNUNET_free (info->mesh_data);
1439 i = peer_info_transmit_slot (neighbor);
1440 info->handler_n = i;
1441 info->peer = neighbor;
1442 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1443 neighbor->infos[i] = info;
1444 neighbor->core_transmit[i] =
1445 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1446 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1447 size, &send_core_data_raw, info);
1453 * Sends a CREATE PATH message for a path to a peer, properly registrating
1454 * all used resources.
1456 * @param peer PeerInfo of the final peer for whom this path is being created.
1457 * @param p Path itself.
1458 * @param t Tunnel for which the path is created.
1461 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
1462 struct MeshTunnel *t)
1464 struct GNUNET_PeerIdentity id;
1465 struct MeshPathInfo *path_info;
1466 struct MeshPeerInfo *neighbor;
1471 p = tree_get_path_to_peer (t->tree, peer->id);
1478 for (i = 0; i < p->length; i++)
1480 if (p->peers[i] == myid)
1483 if (i >= p->length - 1)
1489 GNUNET_PEER_resolve (p->peers[i + 1], &id);
1491 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1492 path_info->path = p;
1494 neighbor = peer_info_get (&id);
1495 path_info->peer = neighbor;
1496 path_info->pos = peer_info_transmit_slot (neighbor);
1497 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1498 neighbor->infos[path_info->pos] = path_info;
1499 neighbor->core_transmit[path_info->pos] =
1500 GNUNET_CORE_notify_transmit_ready (core_handle, /* handle */
1503 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1505 sizeof (struct GNUNET_MESH_ManipulatePath) +
1506 (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1507 &send_core_create_path, /* callback */
1508 path_info); /* cls */
1513 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1515 * @param t Tunnel whose path to destroy.
1516 * @param destination Short ID of the peer to whom the path to destroy.
1519 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1521 struct MeshPeerPath *p;
1524 p = tree_get_path_to_peer (t->tree, destination);
1530 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1531 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1533 struct GNUNET_MESH_ManipulatePath *msg;
1534 struct GNUNET_PeerIdentity *pi;
1538 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1539 msg->header.size = htons (size);
1540 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1541 msg->tid = htonl (t->id.tid);
1542 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1543 for (i = 0; i < p->length; i++)
1545 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
1547 send_message (&msg->header, tree_get_first_hop (t->tree, destination));
1554 * Try to establish a new connection to this peer.
1555 * Use the best path for the given tunnel.
1556 * If the peer doesn't have any path to it yet, try to get one.
1557 * If the peer already has some path, send a CREATE PATH towards it.
1559 * @param peer PeerInfo of the peer.
1560 * @param t Tunnel for which to create the path, if possible.
1563 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1565 struct MeshPeerPath *p;
1566 struct MeshPathInfo *path_info;
1568 if (NULL != peer->path_head)
1570 p = tree_get_path_to_peer (t->tree, peer->id);
1577 // FIXME always send create path to self
1580 send_create_path (peer, p, t);
1584 GNUNET_HashCode hash;
1587 send_client_peer_connected (t, myid);
1588 t->local_tid_dest = next_local_tid++;
1589 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1592 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
1593 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1600 else if (NULL == peer->dhtget)
1602 struct GNUNET_PeerIdentity id;
1604 GNUNET_PEER_resolve (peer->id, &id);
1605 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1606 path_info->peer = peer;
1608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1609 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1610 peer->dhtgetcls = path_info;
1611 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1612 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1613 GNUNET_BLOCK_TYPE_TEST, /* type */
1614 &id.hashPubKey, /* key to search */
1615 10U, /* replication level */
1616 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, /* xquery */
1617 0, /* xquery bits */
1618 &dht_get_id_handler, path_info);
1620 /* Otherwise, there is no path but the DHT get is already started. */
1625 * Task to delay the connection of a peer
1627 * @param cls Closure (path info with tunnel and peer to connect).
1628 * Will be free'd on exection.
1629 * @param tc TaskContext
1632 peer_info_connect_task (void *cls,
1633 const struct GNUNET_SCHEDULER_TaskContext *tc)
1635 struct MeshPathInfo *path_info = cls;
1637 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1642 peer_info_connect (path_info->peer, path_info->t);
1648 * Destroy the peer_info and free any allocated resources linked to it
1650 * @param pi The peer_info to destroy.
1652 * @return GNUNET_OK on success
1655 peer_info_destroy (struct MeshPeerInfo *pi)
1657 struct GNUNET_PeerIdentity id;
1658 struct MeshPeerPath *p;
1659 struct MeshPeerPath *nextp;
1662 GNUNET_PEER_resolve (pi->id, &id);
1663 GNUNET_PEER_change_rc (pi->id, -1);
1666 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1669 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1670 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1672 if (NULL != pi->dhtget)
1674 GNUNET_DHT_get_stop (pi->dhtget);
1675 GNUNET_free (pi->dhtgetcls);
1677 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1679 peer_info_cancel_transmission (pi, i);
1685 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1695 * Remove all paths that rely on a direct connection between p1 and p2
1696 * from the peer itself and notify all tunnels about it.
1698 * @param peer PeerInfo of affected peer.
1699 * @param p1 GNUNET_PEER_Id of one peer.
1700 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1703 * TODO: optimize (see below)
1706 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1709 struct MeshPeerPath *p;
1710 struct MeshPeerPath *aux;
1711 struct MeshPeerInfo *peer_d;
1713 unsigned int destroyed;
1719 p = peer->path_head;
1723 for (i = 0; i < (p->length - 1); i++)
1725 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1726 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1728 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1739 for (i = 0; i < peer->ntunnels; i++)
1741 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1745 * Problem: one or more peers have been deleted from the tunnel tree.
1746 * We don't know who they are to try to add them again.
1747 * We need to try to find a new path for each of the disconnected peers.
1748 * Some of them might already have a path to reach them that does not
1749 * involve p1 and p2. Adding all anew might render in a better tree than
1750 * the trivial immediate fix.
1752 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1753 * its children will be reachable trough him.
1755 peer_d = peer_info_get_short (d);
1758 for (p = peer_d->path_head; NULL != p; p = p->next)
1760 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
1768 /* No callback, as peer will be already disconnected and a connection
1769 * scheduled by tunnel_notify_connection_broken.
1771 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
1775 peer_info_connect (peer_d, peer->tunnels[i]);
1782 * Add the path to the peer and update the path used to reach it in case this
1785 * @param peer_info Destination peer to add the path to.
1786 * @param path New path to add. Last peer must be the peer in arg 1.
1787 * Path will be either used of freed if already known.
1788 * @param trusted Do we trust that this path is real?
1791 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1794 struct MeshPeerPath *aux;
1798 if ((NULL == peer_info) || (NULL == path))
1801 path_destroy (path);
1804 if (path->peers[path->length - 1] != peer_info->id)
1807 path_destroy (path);
1810 if (path->length <= 2 && GNUNET_NO == trusted)
1812 /* Only allow CORE to tell us about direct paths */
1813 path_destroy (path);
1816 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1817 for (l = 1; l < path->length; l++)
1819 if (path->peers[l] == myid)
1821 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1822 for (l2 = 0; l2 < path->length - l; l2++)
1824 path->peers[l2] = path->peers[l + l2];
1829 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1834 struct GNUNET_PeerIdentity id;
1836 GNUNET_PEER_resolve (peer_info->id, &id);
1837 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1838 path->length, GNUNET_i2s (&id));
1841 l = path_get_length (path);
1848 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1849 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1851 l2 = path_get_length (aux);
1854 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1855 peer_info->path_tail, aux, path);
1860 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1862 path_destroy (path);
1867 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1874 * Add the path to the origin peer and update the path used to reach it in case
1875 * this is the shortest.
1876 * The path is given in peer_info -> destination, therefore we turn the path
1877 * upside down first.
1879 * @param peer_info Peer to add the path to, being the origin of the path.
1880 * @param path New path to add after being inversed.
1881 * @param trusted Do we trust that this path is real?
1884 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1885 struct MeshPeerPath *path, int trusted)
1888 peer_info_add_path (peer_info, path, trusted);
1893 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1894 * to obtain a local peer -> destination path and interning the peer ids.
1896 * @return Newly allocated and created path
1898 static struct MeshPeerPath *
1899 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1900 unsigned int get_path_length,
1901 const struct GNUNET_PeerIdentity *put_path,
1902 unsigned int put_path_length)
1904 struct MeshPeerPath *p;
1910 GNUNET_PEER_change_rc (myid, 1);
1911 i = get_path_length;
1912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1913 for (i--; i >= 0; i--)
1915 id = GNUNET_PEER_intern (&get_path[i]);
1916 if (p->length > 0 && id == p->peers[p->length - 1])
1918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1919 GNUNET_PEER_change_rc (id, -1);
1923 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1924 GNUNET_i2s (&get_path[i]));
1926 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1927 p->peers[p->length - 1] = id;
1930 i = put_path_length;
1931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1932 for (i--; i >= 0; i--)
1934 id = GNUNET_PEER_intern (&put_path[i]);
1937 /* PUT path went through us, so discard the path up until now and start
1938 * from here to get a much shorter (and loop-free) path.
1943 if (p->length > 0 && id == p->peers[p->length - 1])
1945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1946 GNUNET_PEER_change_rc (id, -1);
1950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1951 GNUNET_i2s (&put_path[i]));
1953 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1954 p->peers[p->length - 1] = id;
1958 if (get_path_length > 0)
1959 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1960 GNUNET_i2s (&get_path[0]));
1961 if (put_path_length > 0)
1962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1963 GNUNET_i2s (&put_path[0]));
1964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1966 for (i = 0; i < p->length; i++)
1968 struct GNUNET_PeerIdentity peer_id;
1970 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1972 GNUNET_i2s (&peer_id));
1980 * Adds a path to the peer_infos of all the peers in the path
1982 * @param p Path to process.
1983 * @param confirmed Whether we know if the path works or not. FIXME use
1986 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1990 /* TODO: invert and add */
1991 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1992 for (i++; i < p->length; i++)
1994 struct MeshPeerInfo *aux;
1995 struct MeshPeerPath *copy;
1997 aux = peer_info_get_short (p->peers[i]);
1998 copy = path_duplicate (p);
1999 copy->length = i + 1;
2000 peer_info_add_path (aux, copy, GNUNET_NO);
2006 * Send keepalive packets for a peer
2008 * @param cls Closure (tunnel for which to send the keepalive).
2009 * @param tc Notification context.
2011 * TODO: implement explicit multicast keepalive?
2014 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2018 * Search for a tunnel among the incoming tunnels
2020 * @param tid the local id of the tunnel
2022 * @return tunnel handler, NULL if doesn't exist
2024 static struct MeshTunnel *
2025 tunnel_get_incoming (MESH_TunnelNumber tid)
2027 GNUNET_HashCode hash;
2029 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2030 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2031 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2036 * Search for a tunnel among the tunnels for a client
2038 * @param c the client whose tunnels to search in
2039 * @param tid the local id of the tunnel
2041 * @return tunnel handler, NULL if doesn't exist
2043 static struct MeshTunnel *
2044 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2046 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2048 return tunnel_get_incoming (tid);
2052 GNUNET_HashCode hash;
2054 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2055 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2061 * Search for a tunnel by global ID using PEER_ID
2063 * @param pi owner of the tunnel
2064 * @param tid global tunnel number
2066 * @return tunnel handler, NULL if doesn't exist
2068 static struct MeshTunnel *
2069 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2071 struct MESH_TunnelID id;
2072 GNUNET_HashCode hash;
2077 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2078 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2083 * Search for a tunnel by global ID using full PeerIdentities
2085 * @param oid owner of the tunnel
2086 * @param tid global tunnel number
2088 * @return tunnel handler, NULL if doesn't exist
2090 static struct MeshTunnel *
2091 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2093 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2098 * Delete an active client from the tunnel.
2104 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
2108 for (i = 0; i < t->nclients; i++)
2110 if (t->clients[i] == c)
2112 t->clients[i] = t->clients[t->nclients - 1];
2113 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
2121 * Delete an ignored client from the tunnel.
2127 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
2131 for (i = 0; i < t->nignore; i++)
2133 if (t->ignore[i] == c)
2135 t->ignore[i] = t->ignore[t->nignore - 1];
2136 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
2144 * Delete a client from the tunnel. It should be only done on
2145 * client disconnection, otherwise use client_ignore_tunnel.
2151 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
2153 tunnel_delete_ignored_client (t, c);
2154 tunnel_delete_active_client (t, c);
2159 * Callback used to notify a client owner of a tunnel that a peer has
2160 * disconnected, most likely because of a path change.
2162 * @param cls Closure (tunnel this notification is about).
2163 * @param peer_id Short ID of disconnected peer.
2166 notify_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
2168 struct MeshTunnel *t = cls;
2169 struct MeshPeerInfo *peer;
2170 struct MeshPathInfo *path_info;
2172 if (NULL != t->owner && NULL != nc)
2174 struct GNUNET_MESH_PeerControl msg;
2176 msg.header.size = htons (sizeof (msg));
2177 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2178 msg.tunnel_id = htonl (t->local_tid);
2179 GNUNET_PEER_resolve (peer_id, &msg.peer);
2180 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2181 &msg.header, GNUNET_NO);
2183 peer = peer_info_get_short (peer_id);
2184 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2185 path_info->peer = peer;
2187 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
2192 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
2193 * needed rescources.
2194 * If peer already exists, reevaluate shortest path and change if different.
2196 * @param t Tunnel we want to add a new peer to
2197 * @param peer PeerInfo of the peer being added
2201 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
2203 struct GNUNET_PeerIdentity id;
2204 struct MeshPeerPath *best_p;
2205 struct MeshPeerPath *p;
2206 unsigned int best_cost;
2209 GNUNET_PEER_resolve (peer->id, &id);
2211 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
2214 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
2215 GNUNET_assert (GNUNET_OK ==
2216 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
2218 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2221 if (NULL != (p = peer->path_head))
2224 best_cost = tree_get_path_cost (t->tree, p);
2227 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
2234 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected, t);
2235 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
2236 t->path_refresh_task =
2237 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
2241 /* Start a DHT get */
2242 peer_info_connect (peer, t);
2247 * Add a path to a tunnel which we don't own, just to remember the next hop.
2248 * If destination node was already in the tunnel, the first hop information
2249 * will be replaced with the new path.
2251 * @param t Tunnel we want to add a new peer to
2252 * @param p Path to add
2253 * @param own_pos Position of local node in path.
2257 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
2258 unsigned int own_pos)
2260 struct GNUNET_PeerIdentity id;
2262 GNUNET_assert (0 != own_pos);
2263 tree_add_path (t->tree, p, NULL, NULL);
2264 if (own_pos < p->length - 1)
2266 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
2267 tree_update_first_hops (t->tree, myid, &id);
2273 * Notifies a tunnel that a connection has broken that affects at least
2274 * some of its peers. Sends a notification towards the root of the tree.
2275 * In case the peer is the owner of the tree, notifies the client that owns
2276 * the tunnel and tries to reconnect.
2278 * @param t Tunnel affected.
2279 * @param p1 Peer that got disconnected from p2.
2280 * @param p2 Peer that got disconnected from p1.
2282 * @return Short ID of the peer disconnected (either p1 or p2).
2283 * 0 if the tunnel remained unaffected.
2285 static GNUNET_PEER_Id
2286 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2292 tree_notify_connection_broken (t->tree, p1, p2, ¬ify_peer_disconnected,
2294 if (myid != p1 && myid != p2)
2300 if (tree_get_predecessor (t->tree) != 0)
2302 /* We are the peer still connected, notify owner of the disconnection. */
2303 struct GNUNET_MESH_PathBroken msg;
2304 struct GNUNET_PeerIdentity neighbor;
2306 msg.header.size = htons (sizeof (msg));
2307 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2308 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2309 msg.tid = htonl (t->id.tid);
2310 msg.peer1 = my_full_id;
2311 GNUNET_PEER_resolve (pid, &msg.peer2);
2312 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2313 send_message (&msg.header, &neighbor);
2321 * Send a multicast packet to a neighbor.
2323 * @param cls Closure (Info about the multicast packet)
2324 * @param neighbor_id Short ID of the neighbor to send the packet to.
2327 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
2329 struct MeshData *mdata = cls;
2330 struct MeshTransmissionDescriptor *info;
2331 struct GNUNET_PeerIdentity neighbor;
2334 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2336 info->mesh_data = mdata;
2337 (*(mdata->reference_counter)) ++;
2338 info->destination = neighbor_id;
2339 GNUNET_PEER_resolve (neighbor_id, &neighbor);
2340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
2341 GNUNET_i2s (&neighbor));
2342 info->peer = peer_info_get (&neighbor);
2343 GNUNET_assert (NULL != info->peer);
2344 i = peer_info_transmit_slot (info->peer);
2345 info->handler_n = i;
2346 info->peer->infos[i] = info;
2347 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2348 info->peer->core_transmit[i] =
2349 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2350 GNUNET_TIME_UNIT_FOREVER_REL,
2351 &neighbor, info->mesh_data->data_len,
2352 &send_core_data_multicast, info);
2356 * Send a message in a tunnel in multicast, sending a copy to each child node
2357 * down the local one in the tunnel tree.
2359 * @param t Tunnel in which to send the data.
2360 * @param msg Message to be sent.
2361 * @param internal Has the service generated this message?
2364 tunnel_send_multicast (struct MeshTunnel *t,
2365 const struct GNUNET_MessageHeader *msg,
2368 struct MeshData *mdata;
2370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2371 " sending a multicast packet...\n");
2372 mdata = GNUNET_malloc (sizeof (struct MeshData));
2373 mdata->data_len = ntohs (msg->size);
2374 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2376 mdata->data = GNUNET_malloc (mdata->data_len);
2377 memcpy (mdata->data, msg, mdata->data_len);
2378 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2380 struct GNUNET_MESH_Multicast *mcast;
2382 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
2383 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
2384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
2385 ntohl (mcast->ttl));
2389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
2391 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
2392 && GNUNET_NO == internal)
2394 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
2396 GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT, &client_allow_send,
2398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
2402 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
2403 if (*(mdata->reference_counter) == 0)
2405 GNUNET_free (mdata->data);
2406 GNUNET_free (mdata->reference_counter);
2407 if (NULL != mdata->task)
2409 GNUNET_SCHEDULER_cancel(*(mdata->task));
2410 GNUNET_free (mdata->task);
2411 GNUNET_SERVER_receive_done(t->owner->handle, GNUNET_OK);
2413 // FIXME change order?
2414 GNUNET_free (mdata);
2416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2417 " sending a multicast packet done\n");
2423 * Send a message to all peers in this tunnel that the tunnel is no longer
2426 * @param t The tunnel whose peers to notify.
2429 tunnel_send_destroy (struct MeshTunnel *t)
2431 struct GNUNET_MESH_TunnelDestroy msg;
2433 msg.header.size = htons (sizeof (msg));
2434 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2435 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2436 msg.tid = htonl (t->id.tid);
2437 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
2443 * Destroy the tunnel and free any allocated resources linked to it.
2445 * @param t the tunnel to destroy
2447 * @return GNUNET_OK on success
2450 tunnel_destroy (struct MeshTunnel *t)
2452 struct MeshClient *c;
2453 struct MeshQueue *q;
2454 struct MeshQueue *qn;
2455 GNUNET_HashCode hash;
2466 struct GNUNET_PeerIdentity id;
2468 GNUNET_PEER_resolve (t->id.oid, &id);
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2470 GNUNET_i2s (&id), t->id.tid);
2472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2476 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2477 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2482 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2485 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2489 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2490 for (i = 0; i < t->nclients; i++)
2494 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2499 for (i = 0; i < t->nignore; i++)
2503 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
2508 if (t->nclients > 0)
2511 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2515 GNUNET_free (t->clients);
2517 if (NULL != t->peers)
2519 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
2521 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2526 if (NULL != q->data)
2527 GNUNET_free (q->data);
2531 /* TODO cancel core transmit ready in case it was active */
2533 tree_destroy (t->tree);
2534 if (NULL != t->dht_get_type)
2535 GNUNET_DHT_get_stop (t->dht_get_type);
2536 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2537 GNUNET_SCHEDULER_cancel (t->timeout_task);
2538 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2539 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
2546 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2547 * that are no longer needed, as well as nodes of no longer reachable peers.
2548 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2550 * @param t Tunnel from which to remove the path.
2551 * @param peer Short id of the peer which should be removed.
2554 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
2556 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
2562 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2563 * client when the client disconnects. If the client is not the owner, the
2564 * owner will get notified if no more clients are in the tunnel and the client
2565 * get removed from the tunnel's list.
2567 * @param cls closure (client that is disconnecting)
2568 * @param key the hash of the local tunnel id (used to access the hashmap)
2569 * @param value the value stored at the key (tunnel to destroy)
2571 * @return GNUNET_OK on success
2574 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2576 struct MeshTunnel *t = value;
2577 struct MeshClient *c = cls;
2580 send_client_tunnel_disconnect(t, c);
2583 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2584 "Client %u is destination, keeping the tunnel alive.\n", c->id);
2585 tunnel_delete_client(t, c);
2586 client_delete_tunnel(c, t);
2589 tunnel_send_destroy(t);
2590 r = tunnel_destroy (t);
2596 * Timeout function, destroys tunnel if called
2598 * @param cls Closure (tunnel to destroy).
2599 * @param tc TaskContext
2602 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2604 struct MeshTunnel *t = cls;
2606 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2608 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2613 * Resets the tunnel timeout. Starts it if no timeout was running.
2615 * @param t Tunnel whose timeout to reset.
2618 tunnel_reset_timeout (struct MeshTunnel *t)
2620 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2621 GNUNET_SCHEDULER_cancel (t->timeout_task);
2623 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2624 (REFRESH_PATH_TIME, 4), &tunnel_timeout, t);
2628 /******************************************************************************/
2629 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2630 /******************************************************************************/
2633 * Function called to notify a client about the socket
2634 * being ready to queue more data. "buf" will be
2635 * NULL and "size" zero if the socket was closed for
2636 * writing in the meantime.
2638 * @param cls closure
2639 * @param size number of bytes available in buf
2640 * @param buf where the callee should write the message
2641 * @return number of bytes written to buf
2644 send_core_create_path (void *cls, size_t size, void *buf)
2646 struct MeshPathInfo *info = cls;
2647 struct GNUNET_MESH_ManipulatePath *msg;
2648 struct GNUNET_PeerIdentity *peer_ptr;
2649 struct MeshPeerInfo *peer = info->peer;
2650 struct MeshTunnel *t = info->t;
2651 struct MeshPeerPath *p = info->path;
2655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
2657 sizeof (struct GNUNET_MESH_ManipulatePath) +
2658 p->length * sizeof (struct GNUNET_PeerIdentity);
2660 if (size < size_needed || NULL == buf)
2662 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "create path retransmit!\n");
2663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " buf: %p\n", buf);
2664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " size: (%u/%u)\n", size,
2666 info->peer->core_transmit[info->pos] =
2667 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2668 GNUNET_TIME_UNIT_FOREVER_REL,
2669 tree_get_first_hop (t->tree,
2671 size_needed, &send_core_create_path,
2675 info->peer->core_transmit[info->pos] = NULL;
2678 struct GNUNET_PeerIdentity id;
2680 GNUNET_PEER_resolve (peer->id, &id);
2681 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2682 " setting core_transmit %s [%u] to NULL\n",
2683 GNUNET_i2s (&id), info->pos);
2686 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2687 msg->header.size = htons (size_needed);
2688 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2689 msg->tid = ntohl (t->id.tid);
2691 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2692 for (i = 0; i < p->length; i++)
2694 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2701 "CREATE PATH (%u bytes long) sent!\n", size_needed);
2707 * Function called to notify a client about the socket
2708 * being ready to queue more data. "buf" will be
2709 * NULL and "size" zero if the socket was closed for
2710 * writing in the meantime.
2712 * @param cls closure (data itself)
2713 * @param size number of bytes available in buf
2714 * @param buf where the callee should write the message
2716 * @return number of bytes written to buf
2719 send_core_data_multicast (void *cls, size_t size, void *buf)
2721 struct MeshTransmissionDescriptor *info = cls;
2724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
2725 GNUNET_assert (NULL != info);
2726 GNUNET_assert (NULL != info->peer);
2727 total_size = info->mesh_data->data_len;
2728 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2730 if (total_size > size)
2733 struct GNUNET_PeerIdentity id;
2735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2736 "Multicast: retransmitting... (%u/%u)\n", size,
2738 GNUNET_PEER_resolve (info->peer->id, &id);
2739 info->peer->core_transmit[info->handler_n] =
2740 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2741 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2743 &send_core_data_multicast, info);
2746 info->peer->core_transmit[info->handler_n] = NULL;
2747 info->peer->infos[info->handler_n] = NULL;
2748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
2749 memcpy (buf, info->mesh_data->data, total_size);
2752 struct GNUNET_MESH_Multicast *mc;
2753 struct GNUNET_MessageHeader *mh;
2756 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2758 mc = (struct GNUNET_MESH_Multicast *) mh;
2759 mh = (struct GNUNET_MessageHeader *) &mc[1];
2760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2761 " multicast, payload type %u\n", ntohs (mh->type));
2762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2763 " multicast, payload size %u\n", ntohs (mh->size));
2767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %u\n",
2772 data_descriptor_decrement_multicast (info->mesh_data);
2773 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
2775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
2781 * Function called to notify a client about the socket
2782 * being ready to queue more data. "buf" will be
2783 * NULL and "size" zero if the socket was closed for
2784 * writing in the meantime.
2786 * @param cls closure (MeshTransmissionDescriptor)
2787 * @param size number of bytes available in buf
2788 * @param buf where the callee should write the message
2789 * @return number of bytes written to buf
2792 send_core_path_ack (void *cls, size_t size, void *buf)
2794 struct MeshTransmissionDescriptor *info = cls;
2795 struct GNUNET_MESH_PathACK *msg = buf;
2797 GNUNET_assert (NULL != info);
2800 info->peer->core_transmit[info->handler_n] = NULL;
2802 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2807 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2808 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2809 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2810 msg->tid = htonl (info->origin->tid);
2811 msg->peer_id = my_full_id;
2813 /* TODO add signature */
2815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
2816 return sizeof (struct GNUNET_MESH_PathACK);
2820 /******************************************************************************/
2821 /******************** MESH NETWORK HANDLERS **************************/
2822 /******************************************************************************/
2826 * Core handler for path creation
2828 * @param cls closure
2829 * @param message message
2830 * @param peer peer identity this notification is about
2831 * @param atsi performance data
2832 * @param atsi_count number of records in 'atsi'
2834 * @return GNUNET_OK to keep the connection open,
2835 * GNUNET_SYSERR to close it (signal serious error)
2838 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2839 const struct GNUNET_MessageHeader *message,
2840 const struct GNUNET_ATS_Information *atsi,
2841 unsigned int atsi_count)
2843 unsigned int own_pos;
2846 MESH_TunnelNumber tid;
2847 struct GNUNET_MESH_ManipulatePath *msg;
2848 struct GNUNET_PeerIdentity *pi;
2849 GNUNET_HashCode hash;
2850 struct MeshPeerPath *path;
2851 struct MeshPeerInfo *dest_peer_info;
2852 struct MeshPeerInfo *orig_peer_info;
2853 struct MeshTunnel *t;
2855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2856 "Received a path create msg [%s]\n",
2857 GNUNET_i2s (&my_full_id));
2858 size = ntohs (message->size);
2859 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2861 GNUNET_break_op (0);
2865 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2866 if (size % sizeof (struct GNUNET_PeerIdentity))
2868 GNUNET_break_op (0);
2871 size /= sizeof (struct GNUNET_PeerIdentity);
2874 GNUNET_break_op (0);
2877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
2878 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2880 tid = ntohl (msg->tid);
2881 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2883 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
2884 t = tunnel_get (pi, tid);
2887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
2888 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2889 t->id.oid = GNUNET_PEER_intern (pi);
2891 while (NULL != tunnel_get_incoming (next_local_tid))
2892 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2893 t->local_tid_dest = next_local_tid++;
2894 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2895 t->tree = tree_new (t->id.oid);
2897 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2899 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2900 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2906 tunnel_reset_timeout (t);
2907 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2909 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2910 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2918 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2919 if (NULL == dest_peer_info)
2921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2922 " Creating PeerInfo for destination.\n");
2923 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2924 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2925 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2927 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2929 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2930 if (NULL == orig_peer_info)
2932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2933 " Creating PeerInfo for origin.\n");
2934 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2935 orig_peer_info->id = GNUNET_PEER_intern (pi);
2936 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2937 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
2940 path = path_new (size);
2942 for (i = 0; i < size; i++)
2944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
2945 GNUNET_i2s (&pi[i]));
2946 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2947 if (path->peers[i] == myid)
2950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
2953 /* cannot be self, must be 'not found' */
2954 /* create path: self not found in path through self */
2955 GNUNET_break_op (0);
2956 path_destroy (path);
2957 /* FIXME error. destroy tunnel? leave for timeout? */
2960 path_add_to_peers (path, GNUNET_NO);
2961 tunnel_add_path (t, path, own_pos);
2962 if (own_pos == size - 1)
2964 /* It is for us! Send ack. */
2965 struct MeshTransmissionDescriptor *info;
2968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
2969 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
2970 if (NULL == t->peers)
2972 /* New tunnel! Notify clients on data. */
2973 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
2975 GNUNET_break (GNUNET_OK ==
2976 GNUNET_CONTAINER_multihashmap_put (t->peers,
2977 &my_full_id.hashPubKey,
2980 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
2981 /* FIXME use send_message */
2982 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2983 info->origin = &t->id;
2984 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2985 GNUNET_assert (NULL != info->peer);
2986 j = peer_info_transmit_slot (info->peer);
2987 info->handler_n = j;
2988 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2989 info->peer->infos[j] = info;
2990 info->peer->core_transmit[j] =
2991 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2992 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2993 sizeof (struct GNUNET_MESH_PathACK),
2994 &send_core_path_ack, info);
2998 struct MeshPeerPath *path2;
3000 /* It's for somebody else! Retransmit. */
3001 path2 = path_duplicate (path);
3002 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3003 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3004 path2 = path_duplicate (path);
3005 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
3006 send_create_path (dest_peer_info, path, t);
3013 * Core handler for path destruction
3015 * @param cls closure
3016 * @param message message
3017 * @param peer peer identity this notification is about
3018 * @param atsi performance data
3019 * @param atsi_count number of records in 'atsi'
3021 * @return GNUNET_OK to keep the connection open,
3022 * GNUNET_SYSERR to close it (signal serious error)
3025 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3026 const struct GNUNET_MessageHeader *message,
3027 const struct GNUNET_ATS_Information *atsi,
3028 unsigned int atsi_count)
3030 struct GNUNET_MESH_ManipulatePath *msg;
3031 struct GNUNET_PeerIdentity *pi;
3032 struct MeshPeerPath *path;
3033 struct MeshTunnel *t;
3034 unsigned int own_pos;
3038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3039 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
3040 size = ntohs (message->size);
3041 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
3043 GNUNET_break_op (0);
3047 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
3048 if (size % sizeof (struct GNUNET_PeerIdentity))
3050 GNUNET_break_op (0);
3053 size /= sizeof (struct GNUNET_PeerIdentity);
3056 GNUNET_break_op (0);
3059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3061 msg = (struct GNUNET_MESH_ManipulatePath *) message;
3062 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3064 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
3066 t = tunnel_get (pi, ntohl (msg->tid));
3069 /* TODO notify back: we don't know this tunnel */
3070 GNUNET_break_op (0);
3073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3074 path = path_new (size);
3076 for (i = 0; i < size; i++)
3078 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3079 GNUNET_i2s (&pi[i]));
3080 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3081 if (path->peers[i] == myid)
3084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3085 if (own_pos < path->length - 1)
3086 send_message (message, &pi[own_pos + 1]);
3088 send_client_tunnel_disconnect(t, NULL);
3090 tunnel_delete_peer (t, path->peers[path->length - 1]);
3091 path_destroy (path);
3097 * Core handler for notifications of broken paths
3099 * @param cls closure
3100 * @param message message
3101 * @param peer peer identity this notification is about
3102 * @param atsi performance data
3103 * @param atsi_count number of records in 'atsi'
3105 * @return GNUNET_OK to keep the connection open,
3106 * GNUNET_SYSERR to close it (signal serious error)
3109 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3110 const struct GNUNET_MessageHeader *message,
3111 const struct GNUNET_ATS_Information *atsi,
3112 unsigned int atsi_count)
3114 struct GNUNET_MESH_PathBroken *msg;
3115 struct MeshTunnel *t;
3117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3118 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3119 msg = (struct GNUNET_MESH_PathBroken *) message;
3120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3121 GNUNET_i2s (&msg->peer1));
3122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3123 GNUNET_i2s (&msg->peer2));
3124 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3127 GNUNET_break_op (0);
3130 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3131 GNUNET_PEER_search (&msg->peer2));
3138 * Core handler for tunnel destruction
3140 * @param cls closure
3141 * @param message message
3142 * @param peer peer identity this notification is about
3143 * @param atsi performance data
3144 * @param atsi_count number of records in 'atsi'
3146 * @return GNUNET_OK to keep the connection open,
3147 * GNUNET_SYSERR to close it (signal serious error)
3150 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3151 const struct GNUNET_MessageHeader *message,
3152 const struct GNUNET_ATS_Information *atsi,
3153 unsigned int atsi_count)
3155 struct GNUNET_MESH_TunnelDestroy *msg;
3156 struct MeshTunnel *t;
3158 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3159 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
3160 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
3162 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3163 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3166 /* Probably already got the message from another path,
3167 * destroyed the tunnel and retransmitted to children.
3172 if (t->id.oid == myid)
3174 GNUNET_break_op (0);
3177 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3179 /* Tunnel was incoming, notify clients */
3180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3181 t->local_tid, t->local_tid_dest);
3182 send_clients_tunnel_destroy (t);
3184 tunnel_send_destroy (t);
3191 * Core handler for mesh network traffic going from the origin to a peer
3193 * @param cls closure
3194 * @param peer peer identity this notification is about
3195 * @param message message
3196 * @param atsi performance data
3197 * @param atsi_count number of records in 'atsi'
3198 * @return GNUNET_OK to keep the connection open,
3199 * GNUNET_SYSERR to close it (signal serious error)
3202 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3203 const struct GNUNET_MessageHeader *message,
3204 const struct GNUNET_ATS_Information *atsi,
3205 unsigned int atsi_count)
3207 struct GNUNET_MESH_Unicast *msg;
3208 struct MeshTunnel *t;
3212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3214 size = ntohs (message->size);
3216 sizeof (struct GNUNET_MESH_Unicast) +
3217 sizeof (struct GNUNET_MessageHeader))
3222 msg = (struct GNUNET_MESH_Unicast *) message;
3223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
3224 ntohs (msg[1].header.type));
3225 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3228 /* TODO notify back: we don't know this tunnel */
3229 GNUNET_break_op (0);
3232 tunnel_reset_timeout (t);
3233 pid = GNUNET_PEER_search (&msg->destination);
3236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3237 " it's for us! sending to clients...\n");
3238 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
3241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3242 " not for us, retransmitting...\n");
3243 send_message (message, tree_get_first_hop (t->tree, pid));
3249 * Core handler for mesh network traffic going from the origin to all peers
3251 * @param cls closure
3252 * @param message message
3253 * @param peer peer identity this notification is about
3254 * @param atsi performance data
3255 * @param atsi_count number of records in 'atsi'
3256 * @return GNUNET_OK to keep the connection open,
3257 * GNUNET_SYSERR to close it (signal serious error)
3259 * TODO: Check who we got this from, to validate route.
3262 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3263 const struct GNUNET_MessageHeader *message,
3264 const struct GNUNET_ATS_Information *atsi,
3265 unsigned int atsi_count)
3267 struct GNUNET_MESH_Multicast *msg;
3268 struct MeshTunnel *t;
3271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
3273 size = ntohs (message->size);
3274 if (sizeof (struct GNUNET_MESH_Multicast) +
3275 sizeof (struct GNUNET_MessageHeader) > size)
3277 GNUNET_break_op (0);
3280 msg = (struct GNUNET_MESH_Multicast *) message;
3281 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3285 /* TODO notify that we dont know that tunnel */
3286 GNUNET_break_op (0);
3289 if (t->mid == ntohl (msg->mid))
3291 /* FIXME: already seen this packet, log dropping */
3292 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3293 " Already seen mid %u, DROPPING!\n", t->mid);
3298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3299 " mid %u not seen yet, forwarding\n", ntohl (msg->mid));
3301 t->mid = ntohl (msg->mid);
3302 tunnel_reset_timeout (t);
3304 /* Transmit to locally interested clients */
3305 if (NULL != t->peers &&
3306 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
3308 send_subscribed_clients (message, &msg[1].header);
3310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
3311 if (ntohl (msg->ttl) == 0)
3313 /* FIXME: ttl is 0, log dropping */
3314 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
3317 tunnel_send_multicast (t, message, GNUNET_NO);
3323 * Core handler for mesh network traffic toward the owner of a tunnel
3325 * @param cls closure
3326 * @param message message
3327 * @param peer peer identity this notification is about
3328 * @param atsi performance data
3329 * @param atsi_count number of records in 'atsi'
3331 * @return GNUNET_OK to keep the connection open,
3332 * GNUNET_SYSERR to close it (signal serious error)
3335 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3336 const struct GNUNET_MessageHeader *message,
3337 const struct GNUNET_ATS_Information *atsi,
3338 unsigned int atsi_count)
3340 struct GNUNET_MESH_ToOrigin *msg;
3341 struct GNUNET_PeerIdentity id;
3342 struct MeshPeerInfo *peer_info;
3343 struct MeshTunnel *t;
3346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
3348 size = ntohs (message->size);
3349 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3350 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3352 GNUNET_break_op (0);
3355 msg = (struct GNUNET_MESH_ToOrigin *) message;
3356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
3357 ntohs (msg[1].header.type));
3358 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3362 /* TODO notify that we dont know this tunnel (whom)? */
3363 GNUNET_break_op (0);
3367 if (t->id.oid == myid)
3370 struct GNUNET_MESH_ToOrigin *copy;
3372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3373 " it's for us! sending to clients...\n");
3374 if (NULL == t->owner)
3376 /* got data packet for ownerless tunnel */
3377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no clients!\n");
3378 GNUNET_break_op (0);
3381 /* TODO signature verification */
3382 memcpy (cbuf, message, size);
3383 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3384 copy->tid = htonl (t->local_tid);
3385 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3386 ©->header, GNUNET_YES);
3389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3390 " not for us, retransmitting...\n");
3392 peer_info = peer_info_get (&msg->oid);
3393 if (NULL == peer_info)
3395 /* unknown origin of tunnel */
3399 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3400 send_message (message, &id);
3407 * Core handler for path ACKs
3409 * @param cls closure
3410 * @param message message
3411 * @param peer peer identity this notification is about
3412 * @param atsi performance data
3413 * @param atsi_count number of records in 'atsi'
3415 * @return GNUNET_OK to keep the connection open,
3416 * GNUNET_SYSERR to close it (signal serious error)
3419 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3420 const struct GNUNET_MessageHeader *message,
3421 const struct GNUNET_ATS_Information *atsi,
3422 unsigned int atsi_count)
3424 struct GNUNET_MESH_PathACK *msg;
3425 struct GNUNET_PeerIdentity id;
3426 struct MeshPeerInfo *peer_info;
3427 struct MeshPeerPath *p;
3428 struct MeshTunnel *t;
3430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3431 GNUNET_i2s (&my_full_id));
3432 msg = (struct GNUNET_MESH_PathACK *) message;
3433 t = tunnel_get (&msg->oid, msg->tid);
3436 /* TODO notify that we don't know the tunnel */
3440 peer_info = peer_info_get (&msg->peer_id);
3442 /* Add paths to peers? */
3443 p = tree_get_path_to_peer (t->tree, peer_info->id);
3446 path_add_to_peers (p, GNUNET_YES);
3454 /* Message for us? */
3455 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3458 if (NULL == t->owner)
3460 GNUNET_break_op (0);
3463 if (NULL != t->dht_get_type)
3465 GNUNET_DHT_get_stop (t->dht_get_type);
3466 t->dht_get_type = NULL;
3468 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
3470 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
3471 send_client_peer_connected (t, peer_info->id);
3476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3477 " not for us, retransmitting...\n");
3478 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3479 peer_info = peer_info_get (&msg->oid);
3480 if (NULL == peer_info)
3482 /* If we know the tunnel, we should DEFINITELY know the peer */
3486 send_message (message, &id);
3492 * Functions to handle messages from core
3494 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3495 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3496 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3497 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3498 sizeof (struct GNUNET_MESH_PathBroken)},
3499 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3500 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3501 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3502 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3503 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3504 sizeof (struct GNUNET_MESH_PathACK)},
3510 /******************************************************************************/
3511 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3512 /******************************************************************************/
3515 * deregister_app: iterator for removing each application registered by a client
3517 * @param cls closure
3518 * @param key the hash of the application id (used to access the hashmap)
3519 * @param value the value stored at the key (client)
3521 * @return GNUNET_OK on success
3524 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3526 GNUNET_break (GNUNET_YES ==
3527 GNUNET_CONTAINER_multihashmap_remove (applications, key,
3534 * notify_client_connection_failure: notify a client that the connection to the
3535 * requested remote peer is not possible (for instance, no route found)
3536 * Function called when the socket is ready to queue more data. "buf" will be
3537 * NULL and "size" zero if the socket was closed for writing in the meantime.
3539 * @param cls closure
3540 * @param size number of bytes available in buf
3541 * @param buf where the callee should write the message
3542 * @return number of bytes written to buf
3545 notify_client_connection_failure (void *cls, size_t size, void *buf)
3548 struct MeshPeerInfo *peer_info;
3549 struct GNUNET_MESH_PeerControl *msg;
3550 struct GNUNET_PeerIdentity id;
3552 if (0 == size && NULL == buf)
3554 // TODO retry? cancel?
3558 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3559 peer_info = (struct MeshPeerInfo *) cls;
3560 msg = (struct GNUNET_MESH_PeerControl *) buf;
3561 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3562 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3563 // msg->tunnel_id = htonl(peer_info->t->tid);
3564 GNUNET_PEER_resolve (peer_info->id, &id);
3565 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3573 * Send keepalive packets for a peer
3575 * @param cls Closure (tunnel for which to send the keepalive).
3576 * @param tc Notification context.
3578 * TODO: implement explicit multicast keepalive?
3581 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3583 struct MeshTunnel *t = cls;
3584 struct GNUNET_MessageHeader *payload;
3585 struct GNUNET_MESH_Multicast *msg;
3587 sizeof (struct GNUNET_MESH_Multicast) +
3588 sizeof (struct GNUNET_MessageHeader);
3591 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3595 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3598 "sending keepalive for tunnel %d\n", t->id.tid);
3600 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3601 msg->header.size = htons (size);
3602 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3603 msg->oid = my_full_id;
3604 msg->tid = htonl (t->id.tid);
3605 msg->ttl = htonl (DEFAULT_TTL);
3606 msg->mid = htonl (t->mid + 1);
3608 payload = (struct GNUNET_MessageHeader *) &msg[1];
3609 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
3610 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3611 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
3613 t->path_refresh_task =
3614 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
3620 * Function to process paths received for a new peer addition. The recorded
3621 * paths form the initial tunnel, which can be optimized later.
3622 * Called on each result obtained for the DHT search.
3624 * @param cls closure
3625 * @param exp when will this value expire
3626 * @param key key of the result
3627 * @param get_path path of the get request
3628 * @param get_path_length lenght of get_path
3629 * @param put_path path of the put request
3630 * @param put_path_length length of the put_path
3631 * @param type type of the result
3632 * @param size number of bytes in data
3633 * @param data pointer to the result data
3635 * TODO: re-issue the request after certain time? cancel after X results?
3638 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3639 const GNUNET_HashCode * key,
3640 const struct GNUNET_PeerIdentity *get_path,
3641 unsigned int get_path_length,
3642 const struct GNUNET_PeerIdentity *put_path,
3643 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3644 size_t size, const void *data)
3646 struct MeshPathInfo *path_info = cls;
3647 struct MeshPeerPath *p;
3648 struct GNUNET_PeerIdentity pi;
3651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
3652 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
3655 p = path_build_from_dht (get_path, get_path_length, put_path,
3657 path_add_to_peers (p, GNUNET_NO);
3659 for (i = 0; i < path_info->peer->ntunnels; i++)
3661 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3662 peer_info_connect (path_info->peer, path_info->t);
3670 * Function to process paths received for a new peer addition. The recorded
3671 * paths form the initial tunnel, which can be optimized later.
3672 * Called on each result obtained for the DHT search.
3674 * @param cls closure
3675 * @param exp when will this value expire
3676 * @param key key of the result
3677 * @param get_path path of the get request
3678 * @param get_path_length lenght of get_path
3679 * @param put_path path of the put request
3680 * @param put_path_length length of the put_path
3681 * @param type type of the result
3682 * @param size number of bytes in data
3683 * @param data pointer to the result data
3686 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3687 const GNUNET_HashCode * key,
3688 const struct GNUNET_PeerIdentity *get_path,
3689 unsigned int get_path_length,
3690 const struct GNUNET_PeerIdentity *put_path,
3691 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3692 size_t size, const void *data)
3694 const struct GNUNET_PeerIdentity *pi = data;
3695 struct MeshTunnel *t = cls;
3696 struct MeshPeerInfo *peer_info;
3697 struct MeshPeerPath *p;
3699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
3700 if (size != sizeof (struct GNUNET_PeerIdentity))
3702 GNUNET_break_op (0);
3705 GNUNET_assert (NULL != t->owner);
3706 peer_info = peer_info_get (pi);
3707 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
3709 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3711 p = path_build_from_dht (get_path, get_path_length, put_path,
3713 path_add_to_peers (p, GNUNET_NO);
3715 tunnel_add_peer (t, peer_info);
3716 peer_info_connect (peer_info, t);
3720 /******************************************************************************/
3721 /********************* MESH LOCAL HANDLES **************************/
3722 /******************************************************************************/
3726 * Handler for client disconnection
3728 * @param cls closure
3729 * @param client identification of the client; NULL
3730 * for the last call when the server is destroyed
3733 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3735 struct MeshClient *c;
3736 struct MeshClient *next;
3738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
3741 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
3747 if (c->handle != client)
3749 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
3753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
3755 GNUNET_SERVER_client_drop (c->handle);
3756 c->shutting_down = GNUNET_YES;
3757 GNUNET_assert (NULL != c->own_tunnels);
3758 GNUNET_assert (NULL != c->incoming_tunnels);
3759 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3760 &tunnel_destroy_iterator, c);
3761 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3762 &tunnel_destroy_iterator, c);
3763 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
3764 &tunnel_destroy_iterator, c);
3765 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3766 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3767 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
3769 /* deregister clients applications */
3770 if (NULL != c->apps)
3772 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3773 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3775 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3776 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3778 GNUNET_SCHEDULER_cancel (announce_applications_task);
3779 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3781 if (NULL != c->types)
3782 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3784 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
3789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
3795 * Handler for new clients
3797 * @param cls closure
3798 * @param client identification of the client
3799 * @param message the actual message, which includes messages the client wants
3802 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3803 const struct GNUNET_MessageHeader *message)
3805 struct GNUNET_MESH_ClientConnect *cc_msg;
3806 struct MeshClient *c;
3807 GNUNET_MESH_ApplicationType *a;
3814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
3815 /* Check data sanity */
3816 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3817 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3818 ntypes = ntohs (cc_msg->types);
3819 napps = ntohs (cc_msg->applications);
3821 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3824 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3828 /* Create new client structure */
3829 c = GNUNET_malloc (sizeof (struct MeshClient));
3830 c->id = next_client_id++;
3831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
3833 GNUNET_SERVER_client_keep (client);
3834 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3837 GNUNET_MESH_ApplicationType at;
3840 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3841 for (i = 0; i < napps; i++)
3844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
3845 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3846 /* store in clients hashmap */
3847 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3848 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3849 /* store in global hashmap, for announcements */
3850 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3851 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3853 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3854 announce_applications_task =
3855 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3863 t = (uint16_t *) & a[napps];
3864 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3865 for (i = 0; i < ntypes; i++)
3868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
3869 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3871 /* store in clients hashmap */
3872 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3873 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3874 /* store in global hashmap */
3875 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3876 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3880 " client has %u+%u subscriptions\n", napps, ntypes);
3882 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3883 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3884 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3885 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3886 GNUNET_SERVER_notification_context_add (nc, client);
3888 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
3894 * Handler for requests of new tunnels
3896 * @param cls closure
3897 * @param client identification of the client
3898 * @param message the actual message
3901 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3902 const struct GNUNET_MessageHeader *message)
3904 struct GNUNET_MESH_TunnelMessage *t_msg;
3905 struct MeshTunnel *t;
3906 struct MeshClient *c;
3907 GNUNET_HashCode hash;
3909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
3911 /* Sanity check for client registration */
3912 if (NULL == (c = client_get (client)))
3915 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3920 /* Message sanity check */
3921 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3924 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3928 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3929 /* Sanity check for tunnel numbering */
3930 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3933 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3936 /* Sanity check for duplicate tunnel IDs */
3937 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3940 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3944 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3945 while (NULL != tunnel_get_by_pi (myid, next_tid))
3946 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3947 t->id.tid = next_tid++;
3948 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3950 t->local_tid = ntohl (t_msg->tunnel_id);
3951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
3952 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
3954 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3956 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3958 GNUNET_CONTAINER_multihashmap_put (c->own_tunnels, &hash, t,
3959 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3962 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3966 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3968 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3969 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3972 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3975 t->tree = tree_new (myid);
3977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
3978 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3984 * Handler for requests of deleting tunnels
3986 * @param cls closure
3987 * @param client identification of the client
3988 * @param message the actual message
3991 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3992 const struct GNUNET_MessageHeader *message)
3994 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3995 struct MeshClient *c;
3996 struct MeshTunnel *t;
3997 MESH_TunnelNumber tid;
3999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4000 "Got a DESTROY TUNNEL from client!\n");
4002 /* Sanity check for client registration */
4003 if (NULL == (c = client_get (client)))
4006 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4009 /* Message sanity check */
4010 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4013 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4016 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4017 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4019 /* Retrieve tunnel */
4020 tid = ntohl (tunnel_msg->tunnel_id);
4021 t = tunnel_get_by_local_id(c, tid);
4025 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4026 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4029 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4031 client_ignore_tunnel (c, t);
4033 // TODO: when to destroy incoming tunnel?
4034 if (t->nclients == 0)
4036 GNUNET_assert (GNUNET_YES ==
4037 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
4039 GNUNET_assert (GNUNET_YES ==
4040 GNUNET_CONTAINER_multihashmap_remove (t->peers,
4041 &my_full_id.hashPubKey,
4045 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4048 send_client_tunnel_disconnect(t, c);
4049 client_delete_tunnel(c, t);
4051 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4053 tunnel_send_destroy (t);
4055 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4061 * Handler for connection requests to new peers
4063 * @param cls closure
4064 * @param client identification of the client
4065 * @param message the actual message (PeerControl)
4068 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
4069 const struct GNUNET_MessageHeader *message)
4071 struct GNUNET_MESH_PeerControl *peer_msg;
4072 struct MeshPeerInfo *peer_info;
4073 struct MeshClient *c;
4074 struct MeshTunnel *t;
4075 MESH_TunnelNumber tid;
4077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
4078 /* Sanity check for client registration */
4079 if (NULL == (c = client_get (client)))
4082 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4086 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
4087 /* Sanity check for message size */
4088 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
4091 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4095 /* Tunnel exists? */
4096 tid = ntohl (peer_msg->tunnel_id);
4097 t = tunnel_get_by_local_id (c, tid);
4101 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4105 /* Does client own tunnel? */
4106 if (t->owner->handle != client)
4109 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
4113 GNUNET_i2s (&peer_msg->peer));
4114 peer_info = peer_info_get (&peer_msg->peer);
4116 tunnel_add_peer (t, peer_info);
4117 peer_info_connect (peer_info, t);
4119 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4125 * Handler for disconnection requests of peers in a tunnel
4127 * @param cls closure
4128 * @param client identification of the client
4129 * @param message the actual message (PeerControl)
4132 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
4133 const struct GNUNET_MessageHeader *message)
4135 struct GNUNET_MESH_PeerControl *peer_msg;
4136 struct MeshPeerInfo *peer_info;
4137 struct MeshClient *c;
4138 struct MeshTunnel *t;
4139 MESH_TunnelNumber tid;
4141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
4142 /* Sanity check for client registration */
4143 if (NULL == (c = client_get (client)))
4146 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4149 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
4150 /* Sanity check for message size */
4151 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
4154 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4158 /* Tunnel exists? */
4159 tid = ntohl (peer_msg->tunnel_id);
4160 t = tunnel_get_by_local_id (c, tid);
4164 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
4169 /* Does client own tunnel? */
4170 if (t->owner->handle != client)
4173 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4177 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
4178 GNUNET_i2s (&peer_msg->peer));
4179 /* Is the peer in the tunnel? */
4181 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
4182 if (NULL == peer_info)
4185 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4189 /* Ok, delete peer from tunnel */
4190 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
4191 &peer_msg->peer.hashPubKey);
4193 send_destroy_path (t, peer_info->id);
4194 tunnel_delete_peer (t, peer_info->id);
4195 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4201 * Handler for connection requests to new peers by type
4203 * @param cls closure
4204 * @param client identification of the client
4205 * @param message the actual message (ConnectPeerByType)
4208 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
4209 const struct GNUNET_MessageHeader *message)
4211 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
4212 struct MeshClient *c;
4213 struct MeshTunnel *t;
4214 GNUNET_HashCode hash;
4215 MESH_TunnelNumber tid;
4217 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
4218 /* Sanity check for client registration */
4219 if (NULL == (c = client_get (client)))
4222 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4226 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
4227 /* Sanity check for message size */
4228 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
4229 ntohs (connect_msg->header.size))
4232 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4236 /* Tunnel exists? */
4237 tid = ntohl (connect_msg->tunnel_id);
4238 t = tunnel_get_by_local_id (c, tid);
4242 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4246 /* Does client own tunnel? */
4247 if (t->owner->handle != client)
4250 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4254 /* Do WE have the service? */
4255 t->type = ntohl (connect_msg->type);
4256 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
4257 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
4258 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
4261 /* Yes! Fast forward, add ourselves to the tunnel and send the
4262 * good news to the client, and alert the destination client of
4263 * an incoming tunnel.
4265 * FIXME send a path create to self, avoid code duplication
4267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
4268 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
4269 peer_info_get (&my_full_id),
4270 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
4273 send_client_peer_connected (t, myid);
4274 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
4275 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4277 t->local_tid_dest = next_local_tid++;
4278 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4279 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
4280 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4284 /* Ok, lets find a peer offering the service */
4285 if (NULL != t->dht_get_type)
4287 GNUNET_DHT_get_stop (t->dht_get_type);
4289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
4290 GNUNET_h2s (&hash));
4292 GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
4293 GNUNET_BLOCK_TYPE_TEST, &hash, 10U,
4294 GNUNET_DHT_RO_RECORD_ROUTE |
4295 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, 0,
4296 &dht_get_type_handler, t);
4298 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4304 * Handler for client traffic directed to one peer
4306 * @param cls closure
4307 * @param client identification of the client
4308 * @param message the actual message
4311 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4312 const struct GNUNET_MessageHeader *message)
4314 struct MeshClient *c;
4315 struct MeshTunnel *t;
4316 struct MeshPeerInfo *pi;
4317 struct GNUNET_MESH_Unicast *data_msg;
4318 MESH_TunnelNumber tid;
4321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4322 "Got a unicast request from a client!\n");
4324 /* Sanity check for client registration */
4325 if (NULL == (c = client_get (client)))
4328 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4331 data_msg = (struct GNUNET_MESH_Unicast *) message;
4332 /* Sanity check for message size */
4333 size = ntohs (message->size);
4334 if (sizeof (struct GNUNET_MESH_Unicast) +
4335 sizeof (struct GNUNET_MessageHeader) > size)
4338 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4342 /* Tunnel exists? */
4343 tid = ntohl (data_msg->tid);
4344 t = tunnel_get_by_local_id (c, tid);
4348 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4352 /* Is it a local tunnel? Then, does client own the tunnel? */
4353 if (t->owner->handle != client)
4356 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4360 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
4361 &data_msg->destination.hashPubKey);
4362 /* Is the selected peer in the tunnel? */
4366 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4370 /* Ok, everything is correct, send the message
4371 * (pretend we got it from a mesh peer)
4374 char buf[ntohs (message->size)] GNUNET_ALIGN;
4375 struct GNUNET_MESH_Unicast *copy;
4377 /* Work around const limitation */
4378 copy = (struct GNUNET_MESH_Unicast *) buf;
4379 memcpy (buf, data_msg, size);
4380 copy->oid = my_full_id;
4381 copy->tid = htonl (t->id.tid);
4382 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4383 " calling generic handler...\n");
4384 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
4386 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4392 * Handler for client traffic directed to the origin
4394 * @param cls closure
4395 * @param client identification of the client
4396 * @param message the actual message
4399 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4400 const struct GNUNET_MessageHeader *message)
4402 struct GNUNET_MESH_ToOrigin *data_msg;
4403 struct GNUNET_PeerIdentity id;
4404 struct MeshClient *c;
4405 struct MeshTunnel *t;
4406 MESH_TunnelNumber tid;
4409 /* Sanity check for client registration */
4410 if (NULL == (c = client_get (client)))
4413 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4416 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4417 /* Sanity check for message size */
4418 size = ntohs (message->size);
4419 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4420 sizeof (struct GNUNET_MessageHeader) > size)
4423 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4427 /* Tunnel exists? */
4428 tid = ntohl (data_msg->tid);
4429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4430 "Got a ToOrigin request from a client! Tunnel %X\n", tid);
4431 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4434 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4437 t = tunnel_get_by_local_id (c, tid);
4441 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4445 /* It should be sent by someone who has this as incoming tunnel. */
4446 if (-1 == client_knows_tunnel (c, t))
4449 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4452 GNUNET_PEER_resolve (t->id.oid, &id);
4454 /* Ok, everything is correct, send the message
4455 * (pretend we got it from a mesh peer)
4458 char buf[ntohs (message->size)] GNUNET_ALIGN;
4459 struct GNUNET_MESH_ToOrigin *copy;
4461 /* Work around const limitation */
4462 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4463 memcpy (buf, data_msg, size);
4465 copy->tid = htonl (t->id.tid);
4466 copy->sender = my_full_id;
4467 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4468 " calling generic handler...\n");
4469 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
4471 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4477 * Handler for client traffic directed to all peers in a tunnel
4479 * @param cls closure
4480 * @param client identification of the client
4481 * @param message the actual message
4484 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
4485 const struct GNUNET_MessageHeader *message)
4487 struct MeshClient *c;
4488 struct MeshTunnel *t;
4489 struct GNUNET_MESH_Multicast *data_msg;
4490 MESH_TunnelNumber tid;
4492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4493 "Got a multicast request from a client!\n");
4495 /* Sanity check for client registration */
4496 if (NULL == (c = client_get (client)))
4499 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4502 data_msg = (struct GNUNET_MESH_Multicast *) message;
4503 /* Sanity check for message size */
4504 if (sizeof (struct GNUNET_MESH_Multicast) +
4505 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4508 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4512 /* Tunnel exists? */
4513 tid = ntohl (data_msg->tid);
4514 t = tunnel_get_by_local_id (c, tid);
4518 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4522 /* Does client own tunnel? */
4523 if (t->owner->handle != client)
4526 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4531 char buf[ntohs (message->size)] GNUNET_ALIGN;
4532 struct GNUNET_MESH_Multicast *copy;
4534 copy = (struct GNUNET_MESH_Multicast *) buf;
4535 memcpy (buf, message, ntohs (message->size));
4536 copy->oid = my_full_id;
4537 copy->tid = htonl (t->id.tid);
4538 copy->ttl = htonl (DEFAULT_TTL);
4539 copy->mid = htonl (t->mid + 1);
4540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4541 " calling generic handler...\n");
4542 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
4545 /* receive done gets called when last copy is sent to a neighbor */
4550 * Functions to handle messages from clients
4552 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4553 {&handle_local_new_client, NULL,
4554 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4555 {&handle_local_tunnel_create, NULL,
4556 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4557 sizeof (struct GNUNET_MESH_TunnelMessage)},
4558 {&handle_local_tunnel_destroy, NULL,
4559 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4560 sizeof (struct GNUNET_MESH_TunnelMessage)},
4561 {&handle_local_connect_add, NULL,
4562 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4563 sizeof (struct GNUNET_MESH_PeerControl)},
4564 {&handle_local_connect_del, NULL,
4565 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4566 sizeof (struct GNUNET_MESH_PeerControl)},
4567 {&handle_local_connect_by_type, NULL,
4568 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4569 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4570 {&handle_local_unicast, NULL,
4571 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4572 {&handle_local_to_origin, NULL,
4573 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4574 {&handle_local_multicast, NULL,
4575 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4581 * To be called on core init/fail.
4583 * @param cls service closure
4584 * @param server handle to the server for this service
4585 * @param identity the public identity of this peer
4588 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4589 const struct GNUNET_PeerIdentity *identity)
4591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
4592 core_handle = server;
4593 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4596 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
4597 GNUNET_SCHEDULER_shutdown ();
4603 * Method called whenever a given peer connects.
4605 * @param cls closure
4606 * @param peer peer identity this notification is about
4607 * @param atsi performance data for the connection
4608 * @param atsi_count number of records in 'atsi'
4611 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4612 const struct GNUNET_ATS_Information *atsi,
4613 unsigned int atsi_count)
4615 struct MeshPeerInfo *peer_info;
4616 struct MeshPeerPath *path;
4618 DEBUG_CONN ("Peer connected\n");
4619 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
4620 peer_info = peer_info_get (peer);
4621 if (myid == peer_info->id)
4623 DEBUG_CONN (" (self)\n");
4628 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
4630 path = path_new (2);
4631 path->peers[0] = myid;
4632 path->peers[1] = peer_info->id;
4633 GNUNET_PEER_change_rc (myid, 1);
4634 GNUNET_PEER_change_rc (peer_info->id, 1);
4635 peer_info_add_path (peer_info, path, GNUNET_YES);
4640 * Method called whenever a peer disconnects.
4642 * @param cls closure
4643 * @param peer peer identity this notification is about
4646 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4648 struct MeshPeerInfo *pi;
4651 DEBUG_CONN ("Peer disconnected\n");
4652 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4658 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4660 /* TODO: notify that the transmission failed */
4661 peer_info_cancel_transmission (pi, i);
4663 peer_info_remove_path (pi, pi->id, myid);
4666 DEBUG_CONN (" (self)\n");
4672 /******************************************************************************/
4673 /************************ MAIN FUNCTIONS ****************************/
4674 /******************************************************************************/
4677 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4679 * @param cls closure
4680 * @param key current key code
4681 * @param value value in the hash map
4682 * @return GNUNET_YES if we should continue to iterate,
4686 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4688 struct MeshTunnel *t = value;
4695 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4697 * @param cls closure
4698 * @param key current key code
4699 * @param value value in the hash map
4700 * @return GNUNET_YES if we should continue to iterate,
4704 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4706 struct MeshPeerInfo *p = value;
4708 peer_info_destroy (p);
4713 * Task run during shutdown.
4719 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
4723 if (core_handle != NULL)
4725 GNUNET_CORE_disconnect (core_handle);
4728 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4729 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4730 if (dht_handle != NULL)
4732 GNUNET_DHT_disconnect (dht_handle);
4737 GNUNET_SERVER_notification_context_destroy (nc);
4740 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4742 GNUNET_SCHEDULER_cancel (announce_id_task);
4743 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
4749 * Process mesh requests.
4751 * @param cls closure
4752 * @param server the initialized server
4753 * @param c configuration to use
4756 run (void *cls, struct GNUNET_SERVER_Handle *server,
4757 const struct GNUNET_CONFIGURATION_Handle *c)
4759 struct MeshPeerInfo *peer;
4760 struct MeshPeerPath *p;
4763 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
4764 server_handle = server;
4765 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4766 CORE_QUEUE_SIZE, /* queue size */
4767 NULL, /* Closure passed to MESH functions */
4768 &core_init, /* Call core_init once connected */
4769 &core_connect, /* Handle connects */
4770 &core_disconnect, /* remove peers on disconnects */
4771 NULL, /* Don't notify about all incoming messages */
4772 GNUNET_NO, /* For header only in notification */
4773 NULL, /* Don't notify about all outbound messages */
4774 GNUNET_NO, /* For header-only out notification */
4775 core_handlers); /* Register these handlers */
4777 if (core_handle == NULL)
4780 GNUNET_SCHEDULER_shutdown ();
4785 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4788 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4790 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4791 GNUNET_SCHEDULER_shutdown ();
4794 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4795 GNUNET_free (keyfile);
4796 if (my_private_key == NULL)
4798 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4799 _("Mesh service could not access hostkey. Exiting.\n"));
4800 GNUNET_SCHEDULER_shutdown ();
4803 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4804 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4805 &my_full_id.hashPubKey);
4806 myid = GNUNET_PEER_intern (&my_full_id);
4808 // // transport_handle = GNUNET_TRANSPORT_connect(c,
4815 dht_handle = GNUNET_DHT_connect (c, 64);
4816 if (dht_handle == NULL)
4822 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4824 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4825 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4826 peers = GNUNET_CONTAINER_multihashmap_create (32);
4827 applications = GNUNET_CONTAINER_multihashmap_create (32);
4828 types = GNUNET_CONTAINER_multihashmap_create (32);
4830 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4831 nc = GNUNET_SERVER_notification_context_create (server_handle,
4833 GNUNET_SERVER_disconnect_notify (server_handle,
4834 &handle_local_client_disconnect, NULL);
4838 clients_tail = NULL;
4841 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4842 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4844 /* Create a peer_info for the local peer */
4845 peer = peer_info_get (&my_full_id);
4848 GNUNET_PEER_change_rc (myid, 1);
4849 peer_info_add_path (peer, p, GNUNET_YES);
4851 /* Scheduled the task to clean up when shutdown is called */
4852 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "end of run()\n");
4859 * The main function for the mesh service.
4861 * @param argc number of arguments from the command line
4862 * @param argv command line arguments
4863 * @return 0 ok, 1 on error
4866 main (int argc, char *const *argv)
4870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
4873 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");