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 GET_RESTART_TIME GNUNET_TIME_relative_multiply(\
67 GNUNET_TIME_UNIT_SECONDS,\
70 #define UNACKNOWLEDGED_WAIT GNUNET_TIME_relative_multiply(\
71 GNUNET_TIME_UNIT_SECONDS,\
73 #define DEFAULT_TTL 64
77 #define MESH_DEBUG_DHT GNUNET_NO
78 #define MESH_DEBUG_CONNECTION GNUNET_NO
80 #if MESH_DEBUG_CONNECTION
81 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
83 #define DEBUG_CONN(...)
87 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
89 #define DEBUG_DHT(...)
92 /******************************************************************************/
93 /************************ DATA STRUCTURES ****************************/
94 /******************************************************************************/
96 /** FWD declaration */
101 * Struct representing a piece of data being sent to other peers
105 /** Tunnel it belongs to. */
106 struct MeshTunnel *t;
108 /** In case of a multicast, task to allow a client to send more data if
109 * some neighbor is too slow. */
110 GNUNET_SCHEDULER_TaskIdentifier *task;
112 /** How many remaining neighbors we need to send this to. */
113 unsigned int *reference_counter;
115 /** Size of the data. */
124 * Struct containing all info possibly needed to build a package when called
127 struct MeshTransmissionDescriptor
129 /** ID of the tunnel this packet travels in */
130 struct MESH_TunnelID *origin;
132 /** Who was this message being sent to */
133 struct MeshPeerInfo *peer;
135 /** Ultimate destination of the packet */
136 GNUNET_PEER_Id destination;
138 /** Which handler was used to request the transmission */
139 unsigned int handler_n;
141 /** Data descriptor */
142 struct MeshData* mesh_data;
147 * Struct containing all information regarding a given peer
157 * Last time we heard from this peer
159 struct GNUNET_TIME_Absolute last_contact;
162 * Number of attempts to reconnect so far
164 int n_reconnect_attempts;
167 * Paths to reach the peer, ordered by ascending hop count
169 struct MeshPeerPath *path_head;
172 * Paths to reach the peer, ordered by ascending hop count
174 struct MeshPeerPath *path_tail;
177 * Handle to stop the DHT search for a path to this peer
179 struct GNUNET_DHT_GetHandle *dhtget;
182 * Closure given to the DHT GET
184 struct MeshPathInfo *dhtgetcls;
187 * Handles to stop queued transmissions for this peer
189 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
192 * Pointer to info stuctures used as cls for queued transmissions
194 void *infos[CORE_QUEUE_SIZE];
197 * Type of message being in each transmission
199 uint16_t types[CORE_QUEUE_SIZE];
202 * Array of tunnels this peer participates in
203 * (most probably a small amount, therefore not a hashmap)
204 * When the path to the peer changes, notify these tunnels to let them
205 * re-adjust their path trees.
207 struct MeshTunnel **tunnels;
210 * Number of tunnels this peers participates in
212 unsigned int ntunnels;
217 * Data scheduled to transmit (to local client or remote peer)
224 struct MeshQueue *next;
225 struct MeshQueue *prev;
228 * Target of the data (NULL if target is client)
230 struct MeshPeerInfo *peer;
233 * Client to send the data to (NULL if target is peer)
235 struct MeshClient *client;
238 * Size of the message to transmit
243 * How old is the data?
245 struct GNUNET_TIME_Absolute timestamp;
250 struct GNUNET_MessageHeader *data;
254 * Globally unique tunnel identification (owner + number)
255 * DO NOT USE OVER THE NETWORK
260 * Node that owns the tunnel
265 * Tunnel number to differentiate all the tunnels owned by the node oid
266 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
268 MESH_TunnelNumber tid;
272 struct MeshClient; /* FWD declaration */
275 * Struct containing all information regarding a tunnel
276 * For an intermediate node the improtant info used will be:
277 * - id Tunnel unique identification
278 * - paths[0] To know where to send it next
279 * - metainfo: ready, speeds, accounting
286 struct MESH_TunnelID id;
289 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
291 MESH_TunnelNumber local_tid;
294 * Local tunnel number for local destination clients (incoming number)
295 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
298 MESH_TunnelNumber local_tid_dest;
301 * ID of the last multicast packet seen/sent.
306 * Last time the tunnel was used
308 struct GNUNET_TIME_Absolute timestamp;
311 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
312 * containing peers added by id or by type, not intermediate peers.
314 struct GNUNET_CONTAINER_MultiHashMap *peers;
317 * Number of peers that are connected and potentially ready to receive data
319 unsigned int peers_ready;
322 * Number of peers that have been added to the tunnel
324 unsigned int peers_total;
327 * Client owner of the tunnel, if any
329 struct MeshClient *owner;
332 * Clients that have been informed about the tunnel, if any
334 struct MeshClient **clients;
337 * Number of elements in clients
339 unsigned int nclients;
342 * Clients that have requested to leave the tunnel
344 struct MeshClient **ignore;
347 * Number of elements in clients
349 unsigned int nignore;
352 * Messages ready to transmit
354 struct MeshQueue *queue_head;
355 struct MeshQueue *queue_tail;
360 struct MeshTunnelTree *tree;
363 * Application type we are looking for in this tunnel
365 GNUNET_MESH_ApplicationType type;
368 * Used to search peers offering a service
370 struct GNUNET_DHT_GetHandle *dht_get_type;
373 * Task to keep the used paths alive
375 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
378 * Task to destroy the tunnel after timeout
380 * FIXME: merge the two? a tunnel will have either
381 * a path refresh OR a timeout, never both!
383 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
388 * Info needed to work with tunnel paths and peers
395 struct MeshTunnel *t;
398 * Neighbouring peer to whom we send the packet to
400 struct MeshPeerInfo *peer;
405 struct MeshPeerPath *path;
408 * Position in peer's transmit queue
415 * Struct containing information about a client of the service
422 struct MeshClient *next;
427 struct MeshClient *prev;
430 * Tunnels that belong to this client, indexed by local id
432 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
435 * Tunnels this client has accepted, indexed by incoming local id
437 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
440 * Tunnels this client has rejected, indexed by incoming local id
442 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
444 * Handle to communicate with the client
446 struct GNUNET_SERVER_Client *handle;
449 * Applications that this client has claimed to provide
451 struct GNUNET_CONTAINER_MultiHashMap *apps;
454 * Messages that this client has declared interest in
456 struct GNUNET_CONTAINER_MultiHashMap *types;
459 * Whether the client is active or shutting down (don't send confirmations
460 * to a client that is shutting down.
465 * ID of the client, mainly for debug messages
473 /******************************************************************************/
474 /************************ DEBUG FUNCTIONS ****************************/
475 /******************************************************************************/
479 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
480 * @param cls string to print
481 * @param tc task context
484 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
488 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s\n", s);
496 /******************************************************************************/
497 /*********************** GLOBAL VARIABLES ****************************/
498 /******************************************************************************/
503 static struct MeshClient *clients;
504 static struct MeshClient *clients_tail;
507 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
509 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
512 * Tunnels incoming, indexed by MESH_TunnelNumber
513 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
515 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
518 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
520 static struct GNUNET_CONTAINER_MultiHashMap *peers;
523 * Handle to communicate with core
525 static struct GNUNET_CORE_Handle *core_handle;
528 * Handle to communicate with transport
530 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
535 static struct GNUNET_DHT_Handle *dht_handle;
540 static struct GNUNET_SERVER_Handle *server_handle;
543 * Notification context, to send messages to local clients
545 static struct GNUNET_SERVER_NotificationContext *nc;
548 * Local peer own ID (memory efficient handle)
550 static GNUNET_PEER_Id myid;
553 * Local peer own ID (full value)
555 static struct GNUNET_PeerIdentity my_full_id;
560 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
565 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
568 * Tunnel ID for the next created tunnel (global tunnel number)
570 static MESH_TunnelNumber next_tid;
573 * Tunnel ID for the next incoming tunnel (local tunnel number)
575 static MESH_TunnelNumber next_local_tid;
578 * All application types provided by this peer
580 static struct GNUNET_CONTAINER_MultiHashMap *applications;
583 * All message types clients of this peer are interested in
585 static struct GNUNET_CONTAINER_MultiHashMap *types;
588 * Task to periodically announce provided applications
590 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
593 * Task to periodically announce itself in the network
595 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
598 * Next ID to assign to a client
600 unsigned int next_client_id;
604 /******************************************************************************/
605 /************************ ITERATORS ****************************/
606 /******************************************************************************/
608 /* FIXME move iterators here */
611 /******************************************************************************/
612 /************************ PERIODIC FUNCTIONS ****************************/
613 /******************************************************************************/
616 * Announce iterator over for each application provided by the peer
619 * @param key current key code
620 * @param value value in the hash map
621 * @return GNUNET_YES if we should continue to
626 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
628 /* FIXME are hashes in multihash map equal on all aquitectures? */
629 GNUNET_DHT_put (dht_handle, key, 10U,
630 GNUNET_DHT_RO_RECORD_ROUTE |
631 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, GNUNET_BLOCK_TYPE_TEST,
632 sizeof (struct GNUNET_PeerIdentity),
633 (const char *) &my_full_id,
635 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
636 &mesh_debug, "DHT_put for app completed");
638 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
640 APP_ANNOUNCE_TIME, NULL, NULL);
647 * Periodically announce what applications are provided by local clients
650 * @param tc task context
653 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
655 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
657 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
661 DEBUG_DHT ("MESH: Starting PUT for apps\n");
663 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
665 announce_applications_task =
666 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
668 DEBUG_DHT ("MESH: Finished PUT for apps\n");
675 * Periodically announce self id in the DHT
678 * @param tc task context
681 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
683 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
685 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
689 * - Set data expiration in function of X
692 DEBUG_DHT ("MESH: DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
694 GNUNET_DHT_put (dht_handle, /* DHT handle */
695 &my_full_id.hashPubKey, /* Key to use */
696 10U, /* Replication level */
697 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
698 GNUNET_BLOCK_TYPE_TEST, /* Block type */
699 sizeof (my_full_id), /* Size of the data */
700 (char *) &my_full_id, /* Data itself */
701 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
702 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
704 &mesh_debug, "DHT_put for id completed");
706 NULL, /* Continuation */
707 NULL); /* Continuation closure */
710 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
715 * Function to process paths received for a new peer addition. The recorded
716 * paths form the initial tunnel, which can be optimized later.
717 * Called on each result obtained for the DHT search.
720 * @param exp when will this value expire
721 * @param key key of the result
722 * @param type type of the result
723 * @param size number of bytes in data
724 * @param data pointer to the result data
727 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
728 const GNUNET_HashCode * key,
729 const struct GNUNET_PeerIdentity *get_path,
730 unsigned int get_path_length,
731 const struct GNUNET_PeerIdentity *put_path,
732 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
733 size_t size, const void *data);
736 /******************************************************************************/
737 /****************** GENERAL HELPER FUNCTIONS ************************/
738 /******************************************************************************/
741 * Search for a tunnel by global ID using full PeerIdentities
743 * @param oid owner of the tunnel
744 * @param tid global tunnel number
746 * @return tunnel handler, NULL if doesn't exist
748 static struct MeshTunnel *
749 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
753 * Delete an active client from the tunnel.
759 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
762 * Notify a tunnel that a connection has broken that affects at least
765 * @param t Tunnel affected.
766 * @param p1 Peer that got disconnected from p2.
767 * @param p2 Peer that got disconnected from p1.
769 * @return Short ID of the peer disconnected (either p1 or p2).
770 * 0 if the tunnel remained unaffected.
772 static GNUNET_PEER_Id
773 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
778 * Check if client has registered with the service and has not disconnected
780 * @param client the client to check
782 * @return non-NULL if client exists in the global DLL
784 static struct MeshClient *
785 client_get (struct GNUNET_SERVER_Client *client)
787 struct MeshClient *c;
792 if (c->handle == client)
801 * Checks if a given client has subscribed to certain message type
803 * @param message_type Type of message to check
804 * @param c Client to check
806 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
811 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
815 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
816 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
821 * Allow a client to send more data after transmitting a multicast message
822 * which some neighbor has not yet accepted altough a reasonable time has
825 * @param cls Closure (DataDescriptor containing the task identifier)
826 * @param tc Task Context
828 * FIXME reference counter cshould be just int
831 client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
833 struct MeshData *mdata = cls;
835 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
837 GNUNET_assert (NULL != mdata->reference_counter);
838 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
839 "MESH: CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
840 *(mdata->reference_counter));
841 *(mdata->task) = GNUNET_SCHEDULER_NO_TASK;
842 GNUNET_SERVER_receive_done (mdata->t->owner->handle, GNUNET_OK);
847 * Check whether client wants traffic from a tunnel.
849 * @param c Client to check.
850 * @param t Tunnel to be found.
852 * @return GNUNET_YES if client knows tunnel.
854 * TODO look in client hashmap
857 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
861 for (i = 0; i < t->nclients; i++)
862 if (t->clients[i] == c)
869 * Check whether client has been informed about a tunnel.
871 * @param c Client to check.
872 * @param t Tunnel to be found.
874 * @return GNUNET_YES if client knows tunnel.
876 * TODO look in client hashmap
879 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
883 for (i = 0; i < t->nignore; i++)
884 if (t->ignore[i] == c)
886 return client_wants_tunnel(c, t);
891 * Marks a client as uninterested in traffic from the tunnel, updating both
892 * client and tunnel to reflect this.
894 * @param c Client that doesn't want traffic anymore.
895 * @param t Tunnel which should be ignored.
897 * FIXME when to delete an incoming tunnel?
900 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
902 GNUNET_HashCode hash;
904 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
905 GNUNET_break (GNUNET_YES ==
906 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
908 GNUNET_break (GNUNET_YES ==
909 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
910 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
911 tunnel_delete_active_client (t, c);
912 GNUNET_array_append (t->ignore, t->nignore, c);
917 * Deletes a tunnel from a client (either owner or destination). To be used on
918 * tunnel destroy, otherwise, use client_ignore_tunnel.
920 * @param c Client whose tunnel to delete.
921 * @param t Tunnel which should be deleted.
924 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
926 GNUNET_HashCode hash;
930 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
931 GNUNET_assert (GNUNET_YES ==
932 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
938 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
940 GNUNET_assert (GNUNET_YES ==
941 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
945 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
954 * Send the message to all clients that have subscribed to its type
956 * @param msg Pointer to the message itself
957 * @param payload Pointer to the payload of the message.
958 * @return number of clients this message was sent to
961 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
962 const struct GNUNET_MessageHeader *payload)
964 struct GNUNET_PeerIdentity *oid;
965 struct MeshClient *c;
966 struct MeshTunnel *t;
967 MESH_TunnelNumber *tid;
970 char cbuf[htons (msg->size)];
972 type = ntohs (payload->type);
973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %u\n", type);
976 memcpy (cbuf, msg, sizeof (cbuf));
977 switch (htons (msg->type))
979 struct GNUNET_MESH_Unicast *uc;
980 struct GNUNET_MESH_Multicast *mc;
981 struct GNUNET_MESH_ToOrigin *to;
983 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
984 uc = (struct GNUNET_MESH_Unicast *) cbuf;
988 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
989 mc = (struct GNUNET_MESH_Multicast *) cbuf;
993 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
994 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
1002 t = tunnel_get (oid, ntohl (*tid));
1009 for (count = 0, c = clients; c != NULL; c = c->next)
1011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
1012 if (client_is_subscribed (type, c))
1014 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
1018 *tid = htonl (t->local_tid);
1022 if (GNUNET_NO == client_knows_tunnel (c, t))
1024 /* This client doesn't know the tunnel */
1025 struct GNUNET_MESH_TunnelNotification tmsg;
1026 GNUNET_HashCode hash;
1028 tmsg.header.size = htons (sizeof (tmsg));
1029 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1030 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
1031 tmsg.tunnel_id = htonl (t->local_tid_dest);
1032 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1033 &tmsg.header, GNUNET_NO);
1034 GNUNET_array_append (t->clients, t->nclients, c);
1035 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1037 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
1038 c->incoming_tunnels, &hash, t,
1039 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1041 *tid = htonl (t->local_tid_dest);
1044 /* Check if the client wants to get traffic from the tunnel */
1045 if (GNUNET_NO == client_wants_tunnel(c, t))
1048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
1049 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1050 (struct GNUNET_MessageHeader
1051 *) cbuf, GNUNET_YES);
1059 * Notify the client that owns the tunnel that a peer has connected to it
1060 * (the requested path to it has been confirmed).
1062 * @param t Tunnel whose owner to notify
1063 * @param id Short id of the peer that has connected
1066 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
1068 struct GNUNET_MESH_PeerControl pc;
1070 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1071 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1072 pc.tunnel_id = htonl (t->local_tid);
1073 GNUNET_PEER_resolve (id, &pc.peer);
1074 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
1080 * Notify all clients (not depending on registration status) that the incoming
1081 * tunnel is no longer valid.
1083 * @param t Tunnel that was destroyed.
1086 send_clients_tunnel_destroy (struct MeshTunnel *t)
1088 struct GNUNET_MESH_TunnelMessage msg;
1090 msg.header.size = htons (sizeof (msg));
1091 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1092 msg.tunnel_id = htonl (t->local_tid);
1093 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
1098 * Notify clients of tunnel disconnections, if needed.
1099 * In case the origin disconnects, the destination clients get a tunnel destroy
1100 * notification. If the last destination disconnects (only one remaining client
1101 * in tunnel), the origin gets a (local ID) peer disconnected.
1102 * Note that the function must be called BEFORE removing the client from
1105 * @param t Tunnel that was destroyed.
1106 * @param c Client that disconnected.
1109 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
1115 struct GNUNET_MESH_TunnelMessage msg;
1117 msg.header.size = htons (sizeof (msg));
1118 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1119 msg.tunnel_id = htonl (t->local_tid_dest);
1120 for (i = 0; i < t->nclients; i++)
1121 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
1122 &msg.header, GNUNET_NO);
1124 // FIXME when to disconnect an incoming tunnel?
1125 else if (1 == t->nclients && NULL != t->owner)
1127 struct GNUNET_MESH_PeerControl msg;
1129 msg.header.size = htons (sizeof (msg));
1130 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1131 msg.tunnel_id = htonl (t->local_tid);
1132 msg.peer = my_full_id;
1133 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
1134 &msg.header, GNUNET_NO);
1140 * Function called to notify a client about the socket
1141 * being ready to queue more data. "buf" will be
1142 * NULL and "size" zero if the socket was closed for
1143 * writing in the meantime.
1145 * @param cls closure
1146 * @param size number of bytes available in buf
1147 * @param buf where the callee should write the message
1148 * @return number of bytes written to buf
1151 send_core_create_path (void *cls, size_t size, void *buf);
1155 * Function called to notify a client about the socket
1156 * being ready to queue more data. "buf" will be
1157 * NULL and "size" zero if the socket was closed for
1158 * writing in the meantime.
1160 * @param cls closure (data itself)
1161 * @param size number of bytes available in buf
1162 * @param buf where the callee should write the message
1164 * @return number of bytes written to buf
1167 send_core_data_multicast (void *cls, size_t size, void *buf);
1171 * Decrements the reference counter and frees all resources if needed
1173 * @param mesh_data Data Descriptor used in a multicast message.
1174 * Freed no longer needed (last message).
1177 data_descriptor_decrement_multicast (struct MeshData *mesh_data)
1179 /* Make sure it's a multicast packet */
1180 GNUNET_assert (NULL != mesh_data->reference_counter);
1182 if (0 == --(*(mesh_data->reference_counter)))
1184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1185 if (NULL != mesh_data->task)
1187 if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
1189 GNUNET_SCHEDULER_cancel (*(mesh_data->task));
1190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client...\n");
1191 GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
1193 GNUNET_free (mesh_data->task);
1195 GNUNET_free (mesh_data->reference_counter);
1196 GNUNET_free (mesh_data->data);
1197 GNUNET_free (mesh_data);
1203 * Cancel a core transmission that was already requested and free all resources
1204 * associated to the request.
1206 * @param peer PeeInfo of the peer whose transmission is cancelled.
1207 * @param i Position of the transmission to be cancelled.
1210 peer_info_cancel_transmission (struct MeshPeerInfo *peer, unsigned int i)
1212 if (NULL != peer->core_transmit[i])
1214 struct MeshTransmissionDescriptor *dd;
1215 struct MeshPathInfo *path_info;
1219 struct GNUNET_PeerIdentity id;
1221 GNUNET_PEER_resolve (peer->id, &id);
1222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1223 "MESH: Cancelling data transmission at %s [%u]\n",
1224 GNUNET_i2s (&id), i);
1225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " message type %u\n",
1229 /* TODO: notify that tranmission has failed */
1230 switch (peer->types[i])
1232 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
1233 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1234 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
1236 dd = peer->infos[i];
1237 data_descriptor_decrement_multicast (dd->mesh_data);
1239 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
1240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
1241 path_info = peer->infos[i];
1242 path_destroy (path_info->path);
1246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
1248 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
1249 peer->core_transmit[i] = NULL;
1250 GNUNET_free (peer->infos[i]);
1256 * Get a unused CORE slot to transmit a message to a peer. If all the slots
1257 * are used, cancel one and return it's position.
1259 * @param peer PeerInfo of the neighbor we want to transmit to.
1261 * @return The index of an available slot to transmit to the neighbor.
1264 peer_info_transmit_slot (struct MeshPeerInfo *peer)
1268 for (i = 0; peer->core_transmit[i]; i++)
1270 if (i == (CORE_QUEUE_SIZE - 1))
1272 /* All positions are taken! Overwriting! */
1274 peer_info_cancel_transmission (peer, 0);
1283 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1284 * and insert it in the appropiate structures if the peer is not known yet.
1286 * @param peer Full identity of the peer.
1288 * @return Existing or newly created peer info.
1290 static struct MeshPeerInfo *
1291 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1293 struct MeshPeerInfo *peer_info;
1295 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1296 if (NULL == peer_info)
1299 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1300 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1301 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1302 peer_info->id = GNUNET_PEER_intern (peer);
1310 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1311 * and insert it in the appropiate structures if the peer is not known yet.
1313 * @param peer Short identity of the peer.
1315 * @return Existing or newly created peer info.
1317 static struct MeshPeerInfo *
1318 peer_info_get_short (const GNUNET_PEER_Id peer)
1320 struct GNUNET_PeerIdentity id;
1322 GNUNET_PEER_resolve (peer, &id);
1323 return peer_info_get (&id);
1328 * Iterator to remove the tunnel from the list of tunnels a peer participates
1331 * @param cls Closure (tunnel info)
1332 * @param key GNUNET_PeerIdentity of the peer (unused)
1333 * @param value PeerInfo of the peer
1335 * @return always GNUNET_YES, to keep iterating
1338 peer_info_delete_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
1340 struct MeshTunnel *t = cls;
1341 struct MeshPeerInfo *peer = value;
1344 for (i = 0; i < peer->ntunnels; i++)
1347 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1350 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1351 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1360 * Core callback to write a
1362 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1363 * @param size Number of bytes available in buf.
1364 * @param buf Where the to write the message.
1366 * @return number of bytes written to buf
1369 send_core_data_raw (void *cls, size_t size, void *buf)
1371 struct MeshTransmissionDescriptor *info = cls;
1372 struct GNUNET_MessageHeader *msg;
1375 GNUNET_assert (NULL != info);
1376 GNUNET_assert (NULL != info->mesh_data);
1377 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
1378 total_size = ntohs (msg->size);
1380 if (total_size > size)
1382 struct GNUNET_PeerIdentity id;
1384 GNUNET_PEER_resolve (info->peer->id, &id);
1385 info->peer->core_transmit[info->handler_n] =
1386 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1387 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1388 size, &send_core_data_raw, info);
1391 info->peer->core_transmit[info->handler_n] = NULL;
1392 memcpy (buf, msg, total_size);
1393 GNUNET_free (info->mesh_data);
1400 * Sends an already built message to a peer, properly registrating
1401 * all used resources.
1403 * @param message Message to send. Fucntion makes a copy of it.
1404 * @param peer Short ID of the neighbor whom to send the message.
1409 send_message (const struct GNUNET_MessageHeader *message,
1410 const struct GNUNET_PeerIdentity *peer)
1412 struct MeshTransmissionDescriptor *info;
1413 struct MeshPeerInfo *neighbor;
1414 struct MeshPeerPath *p;
1418 // GNUNET_TRANSPORT_try_connect();
1420 size = ntohs (message->size);
1421 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
1422 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
1423 info->mesh_data->data = GNUNET_malloc (size);
1424 memcpy (info->mesh_data->data, message, size);
1425 info->mesh_data->data_len = size;
1426 neighbor = peer_info_get (peer);
1427 for (p = neighbor->path_head; NULL != p; p = p->next)
1437 GNUNET_free (info->mesh_data->data);
1438 GNUNET_free (info->mesh_data);
1442 i = peer_info_transmit_slot (neighbor);
1443 info->handler_n = i;
1444 info->peer = neighbor;
1445 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1446 neighbor->infos[i] = info;
1447 neighbor->core_transmit[i] =
1448 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1449 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1450 size, &send_core_data_raw, info);
1456 * Sends a CREATE PATH message for a path to a peer, properly registrating
1457 * all used resources.
1459 * @param peer PeerInfo of the final peer for whom this path is being created.
1460 * @param p Path itself.
1461 * @param t Tunnel for which the path is created.
1464 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
1465 struct MeshTunnel *t)
1467 struct GNUNET_PeerIdentity id;
1468 struct MeshPathInfo *path_info;
1469 struct MeshPeerInfo *neighbor;
1474 p = tree_get_path_to_peer (t->tree, peer->id);
1481 for (i = 0; i < p->length; i++)
1483 if (p->peers[i] == myid)
1486 if (i >= p->length - 1)
1492 GNUNET_PEER_resolve (p->peers[i + 1], &id);
1494 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1495 path_info->path = p;
1497 neighbor = peer_info_get (&id);
1498 path_info->peer = neighbor;
1499 path_info->pos = peer_info_transmit_slot (neighbor);
1500 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1501 neighbor->infos[path_info->pos] = path_info;
1502 neighbor->core_transmit[path_info->pos] =
1503 GNUNET_CORE_notify_transmit_ready (core_handle, /* handle */
1506 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1508 sizeof (struct GNUNET_MESH_ManipulatePath) +
1509 (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1510 &send_core_create_path, /* callback */
1511 path_info); /* cls */
1516 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1518 * @param t Tunnel whose path to destroy.
1519 * @param destination Short ID of the peer to whom the path to destroy.
1522 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1524 struct MeshPeerPath *p;
1527 p = tree_get_path_to_peer (t->tree, destination);
1533 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1534 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1536 struct GNUNET_MESH_ManipulatePath *msg;
1537 struct GNUNET_PeerIdentity *pi;
1541 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1542 msg->header.size = htons (size);
1543 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1544 msg->tid = htonl (t->id.tid);
1545 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1546 for (i = 0; i < p->length; i++)
1548 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
1550 send_message (&msg->header, tree_get_first_hop (t->tree, destination));
1557 * Try to establish a new connection to this peer.
1558 * Use the best path for the given tunnel.
1559 * If the peer doesn't have any path to it yet, try to get one.
1560 * If the peer already has some path, send a CREATE PATH towards it.
1562 * @param peer PeerInfo of the peer.
1563 * @param t Tunnel for which to create the path, if possible.
1566 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1568 struct MeshPeerPath *p;
1569 struct MeshPathInfo *path_info;
1571 if (NULL != peer->path_head)
1573 p = tree_get_path_to_peer (t->tree, peer->id);
1580 // FIXME always send create path to self
1583 send_create_path (peer, p, t);
1587 GNUNET_HashCode hash;
1590 send_client_peer_connected (t, myid);
1591 t->local_tid_dest = next_local_tid++;
1592 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1595 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
1596 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1603 else if (NULL == peer->dhtget)
1605 struct GNUNET_PeerIdentity id;
1607 GNUNET_PEER_resolve (peer->id, &id);
1608 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1609 path_info->peer = peer;
1611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1612 "MESH: Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1613 peer->dhtgetcls = path_info;
1614 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1615 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1616 GNUNET_BLOCK_TYPE_TEST, /* type */
1617 &id.hashPubKey, /* key to search */
1618 10U, /* replication level */
1619 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, /* xquery */
1620 0, /* xquery bits */
1621 &dht_get_id_handler, path_info);
1623 /* Otherwise, there is no path but the DHT get is already started. */
1628 * Task to delay the connection of a peer
1630 * @param cls Closure (path info with tunnel and peer to connect).
1631 * Will be free'd on exection.
1632 * @param tc TaskContext
1635 peer_info_connect_task (void *cls,
1636 const struct GNUNET_SCHEDULER_TaskContext *tc)
1638 struct MeshPathInfo *path_info = cls;
1640 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1645 peer_info_connect (path_info->peer, path_info->t);
1651 * Destroy the peer_info and free any allocated resources linked to it
1653 * @param pi The peer_info to destroy.
1655 * @return GNUNET_OK on success
1658 peer_info_destroy (struct MeshPeerInfo *pi)
1660 struct GNUNET_PeerIdentity id;
1661 struct MeshPeerPath *p;
1662 struct MeshPeerPath *nextp;
1665 GNUNET_PEER_resolve (pi->id, &id);
1666 GNUNET_PEER_change_rc (pi->id, -1);
1669 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1672 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1673 "MESH: removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1675 if (NULL != pi->dhtget)
1677 GNUNET_DHT_get_stop (pi->dhtget);
1678 GNUNET_free (pi->dhtgetcls);
1680 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1682 peer_info_cancel_transmission (pi, i);
1688 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1698 * Remove all paths that rely on a direct connection between p1 and p2
1699 * from the peer itself and notify all tunnels about it.
1701 * @param peer PeerInfo of affected peer.
1702 * @param p1 GNUNET_PEER_Id of one peer.
1703 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1706 * TODO: optimize (see below)
1709 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1712 struct MeshPeerPath *p;
1713 struct MeshPeerPath *aux;
1714 struct MeshPeerInfo *peer_d;
1716 unsigned int destroyed;
1722 p = peer->path_head;
1726 for (i = 0; i < (p->length - 1); i++)
1728 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1729 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1731 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1742 for (i = 0; i < peer->ntunnels; i++)
1744 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1748 * Problem: one or more peers have been deleted from the tunnel tree.
1749 * We don't know who they are to try to add them again.
1750 * We need to try to find a new path for each of the disconnected peers.
1751 * Some of them might already have a path to reach them that does not
1752 * involve p1 and p2. Adding all anew might render in a better tree than
1753 * the trivial immediate fix.
1755 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1756 * its children will be reachable trough him.
1758 peer_d = peer_info_get_short (d);
1761 for (p = peer_d->path_head; NULL != p; p = p->next)
1763 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
1771 /* No callback, as peer will be already disconnected and a connection
1772 * scheduled by tunnel_notify_connection_broken.
1774 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
1778 peer_info_connect (peer_d, peer->tunnels[i]);
1785 * Add the path to the peer and update the path used to reach it in case this
1788 * @param peer_info Destination peer to add the path to.
1789 * @param path New path to add. Last peer must be the peer in arg 1.
1790 * Path will be either used of freed if already known.
1791 * @param trusted Do we trust that this path is real?
1794 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1797 struct MeshPeerPath *aux;
1801 if ((NULL == peer_info) || (NULL == path))
1804 path_destroy (path);
1807 if (path->peers[path->length - 1] != peer_info->id)
1810 path_destroy (path);
1813 if (path->length <= 2 && GNUNET_NO == trusted)
1815 /* Only allow CORE to tell us about direct paths */
1816 path_destroy (path);
1819 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1820 for (l = 1; l < path->length; l++)
1822 if (path->peers[l] == myid)
1824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1825 for (l2 = 0; l2 < path->length - l; l2++)
1827 path->peers[l2] = path->peers[l + l2];
1832 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1837 struct GNUNET_PeerIdentity id;
1839 GNUNET_PEER_resolve (peer_info->id, &id);
1840 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1841 path->length, GNUNET_i2s (&id));
1844 l = path_get_length (path);
1851 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1852 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1854 l2 = path_get_length (aux);
1857 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1858 peer_info->path_tail, aux, path);
1863 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1865 path_destroy (path);
1870 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1877 * Add the path to the origin peer and update the path used to reach it in case
1878 * this is the shortest.
1879 * The path is given in peer_info -> destination, therefore we turn the path
1880 * upside down first.
1882 * @param peer_info Peer to add the path to, being the origin of the path.
1883 * @param path New path to add after being inversed.
1884 * @param trusted Do we trust that this path is real?
1887 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1888 struct MeshPeerPath *path, int trusted)
1891 peer_info_add_path (peer_info, path, trusted);
1896 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1897 * to obtain a local peer -> destination path and interning the peer ids.
1899 * @return Newly allocated and created path
1901 static struct MeshPeerPath *
1902 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1903 unsigned int get_path_length,
1904 const struct GNUNET_PeerIdentity *put_path,
1905 unsigned int put_path_length)
1907 struct MeshPeerPath *p;
1913 GNUNET_PEER_change_rc (myid, 1);
1914 i = get_path_length;
1915 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1916 for (i--; i >= 0; i--)
1918 id = GNUNET_PEER_intern (&get_path[i]);
1919 if (p->length > 0 && id == p->peers[p->length - 1])
1921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1922 GNUNET_PEER_change_rc (id, -1);
1926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1927 GNUNET_i2s (&get_path[i]));
1929 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1930 p->peers[p->length - 1] = id;
1933 i = put_path_length;
1934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1935 for (i--; i >= 0; i--)
1937 id = GNUNET_PEER_intern (&put_path[i]);
1940 /* PUT path went through us, so discard the path up until now and start
1941 * from here to get a much shorter (and loop-free) path.
1946 if (p->length > 0 && id == p->peers[p->length - 1])
1948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1949 GNUNET_PEER_change_rc (id, -1);
1953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1954 GNUNET_i2s (&put_path[i]));
1956 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1957 p->peers[p->length - 1] = id;
1961 if (get_path_length > 0)
1962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1963 GNUNET_i2s (&get_path[0]));
1964 if (put_path_length > 0)
1965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1966 GNUNET_i2s (&put_path[0]));
1967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1969 for (i = 0; i < p->length; i++)
1971 struct GNUNET_PeerIdentity peer_id;
1973 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1975 GNUNET_i2s (&peer_id));
1983 * Adds a path to the peer_infos of all the peers in the path
1985 * @param p Path to process.
1986 * @param confirmed Whether we know if the path works or not. FIXME use
1989 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1993 /* TODO: invert and add */
1994 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1995 for (i++; i < p->length; i++)
1997 struct MeshPeerInfo *aux;
1998 struct MeshPeerPath *copy;
2000 aux = peer_info_get_short (p->peers[i]);
2001 copy = path_duplicate (p);
2002 copy->length = i + 1;
2003 peer_info_add_path (aux, copy, GNUNET_NO);
2009 * Send keepalive packets for a peer
2011 * @param cls Closure (tunnel for which to send the keepalive).
2012 * @param tc Notification context.
2014 * TODO: implement explicit multicast keepalive?
2017 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2021 * Search for a tunnel among the incoming tunnels
2023 * @param tid the local id of the tunnel
2025 * @return tunnel handler, NULL if doesn't exist
2027 static struct MeshTunnel *
2028 tunnel_get_incoming (MESH_TunnelNumber tid)
2030 GNUNET_HashCode hash;
2032 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2033 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2034 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2039 * Search for a tunnel among the tunnels for a client
2041 * @param c the client whose tunnels to search in
2042 * @param tid the local id of the tunnel
2044 * @return tunnel handler, NULL if doesn't exist
2046 static struct MeshTunnel *
2047 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2049 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2051 return tunnel_get_incoming (tid);
2055 GNUNET_HashCode hash;
2057 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2058 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2064 * Search for a tunnel by global ID using PEER_ID
2066 * @param pi owner of the tunnel
2067 * @param tid global tunnel number
2069 * @return tunnel handler, NULL if doesn't exist
2071 static struct MeshTunnel *
2072 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2074 struct MESH_TunnelID id;
2075 GNUNET_HashCode hash;
2080 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2081 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2086 * Search for a tunnel by global ID using full PeerIdentities
2088 * @param oid owner of the tunnel
2089 * @param tid global tunnel number
2091 * @return tunnel handler, NULL if doesn't exist
2093 static struct MeshTunnel *
2094 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2096 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2101 * Delete an active client from the tunnel.
2107 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
2111 for (i = 0; i < t->nclients; i++)
2113 if (t->clients[i] == c)
2115 t->clients[i] = t->clients[t->nclients - 1];
2116 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
2124 * Delete an ignored client from the tunnel.
2130 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
2134 for (i = 0; i < t->nignore; i++)
2136 if (t->ignore[i] == c)
2138 t->ignore[i] = t->ignore[t->nignore - 1];
2139 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
2147 * Delete a client from the tunnel. It should be only done on
2148 * client disconnection, otherwise use client_ignore_tunnel.
2154 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
2156 tunnel_delete_ignored_client (t, c);
2157 tunnel_delete_active_client (t, c);
2162 * Callback used to notify a client owner of a tunnel that a peer has
2163 * disconnected, most likely because of a path change.
2165 * @param cls Closure (tunnel this notification is about).
2166 * @param peer_id Short ID of disconnected peer.
2169 notify_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
2171 struct MeshTunnel *t = cls;
2172 struct MeshPeerInfo *peer;
2173 struct MeshPathInfo *path_info;
2175 if (NULL != t->owner && NULL != nc)
2177 struct GNUNET_MESH_PeerControl msg;
2179 msg.header.size = htons (sizeof (msg));
2180 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2181 msg.tunnel_id = htonl (t->local_tid);
2182 GNUNET_PEER_resolve (peer_id, &msg.peer);
2183 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2184 &msg.header, GNUNET_NO);
2186 peer = peer_info_get_short (peer_id);
2187 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2188 path_info->peer = peer;
2190 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
2195 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
2196 * needed rescources.
2197 * If peer already exists, reevaluate shortest path and change if different.
2199 * @param t Tunnel we want to add a new peer to
2200 * @param peer PeerInfo of the peer being added
2204 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
2206 struct GNUNET_PeerIdentity id;
2207 struct MeshPeerPath *best_p;
2208 struct MeshPeerPath *p;
2209 unsigned int best_cost;
2212 GNUNET_PEER_resolve (peer->id, &id);
2214 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
2217 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
2218 GNUNET_assert (GNUNET_OK ==
2219 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
2221 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2224 if (NULL != (p = peer->path_head))
2227 best_cost = tree_get_path_cost (t->tree, p);
2230 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
2237 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected, t);
2238 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
2239 t->path_refresh_task =
2240 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
2244 /* Start a DHT get */
2245 peer_info_connect (peer, t);
2250 * Add a path to a tunnel which we don't own, just to remember the next hop.
2251 * If destination node was already in the tunnel, the first hop information
2252 * will be replaced with the new path.
2254 * @param t Tunnel we want to add a new peer to
2255 * @param p Path to add
2256 * @param own_pos Position of local node in path.
2260 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
2261 unsigned int own_pos)
2263 struct GNUNET_PeerIdentity id;
2265 GNUNET_assert (0 != own_pos);
2266 tree_add_path (t->tree, p, NULL, NULL);
2267 if (own_pos < p->length - 1)
2269 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
2270 tree_update_first_hops (t->tree, myid, &id);
2276 * Notifies a tunnel that a connection has broken that affects at least
2277 * some of its peers. Sends a notification towards the root of the tree.
2278 * In case the peer is the owner of the tree, notifies the client that owns
2279 * the tunnel and tries to reconnect.
2281 * @param t Tunnel affected.
2282 * @param p1 Peer that got disconnected from p2.
2283 * @param p2 Peer that got disconnected from p1.
2285 * @return Short ID of the peer disconnected (either p1 or p2).
2286 * 0 if the tunnel remained unaffected.
2288 static GNUNET_PEER_Id
2289 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2295 tree_notify_connection_broken (t->tree, p1, p2, ¬ify_peer_disconnected,
2297 if (myid != p1 && myid != p2)
2303 if (tree_get_predecessor (t->tree) != 0)
2305 /* We are the peer still connected, notify owner of the disconnection. */
2306 struct GNUNET_MESH_PathBroken msg;
2307 struct GNUNET_PeerIdentity neighbor;
2309 msg.header.size = htons (sizeof (msg));
2310 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2311 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2312 msg.tid = htonl (t->id.tid);
2313 msg.peer1 = my_full_id;
2314 GNUNET_PEER_resolve (pid, &msg.peer2);
2315 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2316 send_message (&msg.header, &neighbor);
2324 * Send a multicast packet to a neighbor.
2326 * @param cls Closure (Info about the multicast packet)
2327 * @param neighbor_id Short ID of the neighbor to send the packet to.
2330 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
2332 struct MeshData *mdata = cls;
2333 struct MeshTransmissionDescriptor *info;
2334 struct GNUNET_PeerIdentity neighbor;
2337 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2339 info->mesh_data = mdata;
2340 (*(mdata->reference_counter)) ++;
2341 info->destination = neighbor_id;
2342 GNUNET_PEER_resolve (neighbor_id, &neighbor);
2343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
2344 GNUNET_i2s (&neighbor));
2345 info->peer = peer_info_get (&neighbor);
2346 GNUNET_assert (NULL != info->peer);
2347 i = peer_info_transmit_slot (info->peer);
2348 info->handler_n = i;
2349 info->peer->infos[i] = info;
2350 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2351 info->peer->core_transmit[i] =
2352 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2353 GNUNET_TIME_UNIT_FOREVER_REL,
2354 &neighbor, info->mesh_data->data_len,
2355 &send_core_data_multicast, info);
2359 * Send a message in a tunnel in multicast, sending a copy to each child node
2360 * down the local one in the tunnel tree.
2362 * @param t Tunnel in which to send the data.
2363 * @param msg Message to be sent.
2364 * @param internal Has the service generated this message?
2367 tunnel_send_multicast (struct MeshTunnel *t,
2368 const struct GNUNET_MessageHeader *msg,
2371 struct MeshData *mdata;
2373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2374 "MESH: sending a multicast packet...\n");
2375 mdata = GNUNET_malloc (sizeof (struct MeshData));
2376 mdata->data_len = ntohs (msg->size);
2377 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2379 mdata->data = GNUNET_malloc (mdata->data_len);
2380 memcpy (mdata->data, msg, mdata->data_len);
2381 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2383 struct GNUNET_MESH_Multicast *mcast;
2385 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
2386 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
2387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
2388 ntohl (mcast->ttl));
2392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
2394 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
2395 && GNUNET_NO == internal)
2397 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
2399 GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT, &client_allow_send,
2401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
2405 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
2406 if (*(mdata->reference_counter) == 0)
2408 GNUNET_free (mdata->data);
2409 GNUNET_free (mdata->reference_counter);
2410 if (NULL != mdata->task)
2412 GNUNET_SCHEDULER_cancel(*(mdata->task));
2413 GNUNET_free (mdata->task);
2414 GNUNET_SERVER_receive_done(t->owner->handle, GNUNET_OK);
2416 // FIXME change order?
2417 GNUNET_free (mdata);
2419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2420 "MESH: sending a multicast packet done\n");
2426 * Send a message to all peers in this tunnel that the tunnel is no longer
2429 * @param t The tunnel whose peers to notify.
2432 tunnel_send_destroy (struct MeshTunnel *t)
2434 struct GNUNET_MESH_TunnelDestroy msg;
2436 msg.header.size = htons (sizeof (msg));
2437 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2438 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2439 msg.tid = htonl (t->id.tid);
2440 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
2446 * Destroy the tunnel and free any allocated resources linked to it.
2448 * @param t the tunnel to destroy
2450 * @return GNUNET_OK on success
2453 tunnel_destroy (struct MeshTunnel *t)
2455 struct MeshClient *c;
2456 struct MeshQueue *q;
2457 struct MeshQueue *qn;
2458 GNUNET_HashCode hash;
2469 struct GNUNET_PeerIdentity id;
2471 GNUNET_PEER_resolve (t->id.oid, &id);
2472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2473 GNUNET_i2s (&id), t->id.tid);
2475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2479 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2480 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2485 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2488 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2492 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2493 for (i = 0; i < t->nclients; i++)
2497 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2502 for (i = 0; i < t->nignore; i++)
2506 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
2511 if (t->nclients > 0)
2514 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2518 GNUNET_free (t->clients);
2520 if (NULL != t->peers)
2522 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
2524 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2529 if (NULL != q->data)
2530 GNUNET_free (q->data);
2534 /* TODO cancel core transmit ready in case it was active */
2536 tree_destroy (t->tree);
2537 if (NULL != t->dht_get_type)
2538 GNUNET_DHT_get_stop (t->dht_get_type);
2539 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2540 GNUNET_SCHEDULER_cancel (t->timeout_task);
2541 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2542 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
2549 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2550 * that are no longer needed, as well as nodes of no longer reachable peers.
2551 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2553 * @param t Tunnel from which to remove the path.
2554 * @param peer Short id of the peer which should be removed.
2557 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
2559 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
2565 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2566 * client when the client disconnects. If the client is not the owner, the
2567 * owner will get notified if no more clients are in the tunnel and the client
2568 * get removed from the tunnel's list.
2570 * @param cls closure (client that is disconnecting)
2571 * @param key the hash of the local tunnel id (used to access the hashmap)
2572 * @param value the value stored at the key (tunnel to destroy)
2574 * @return GNUNET_OK on success
2577 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2579 struct MeshTunnel *t = value;
2580 struct MeshClient *c = cls;
2583 send_client_tunnel_disconnect(t, c);
2586 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2587 "Client %u is destination, keeping the tunnel alive.\n", c->id);
2588 tunnel_delete_client(t, c);
2589 client_delete_tunnel(c, t);
2592 tunnel_send_destroy(t);
2593 r = tunnel_destroy (t);
2599 * Timeout function, destroys tunnel if called
2601 * @param cls Closure (tunnel to destroy).
2602 * @param tc TaskContext
2605 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2607 struct MeshTunnel *t = cls;
2609 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2611 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2616 * Resets the tunnel timeout. Starts it if no timeout was running.
2618 * @param t Tunnel whose timeout to reset.
2621 tunnel_reset_timeout (struct MeshTunnel *t)
2623 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2624 GNUNET_SCHEDULER_cancel (t->timeout_task);
2626 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2627 (REFRESH_PATH_TIME, 4), &tunnel_timeout, t);
2631 /******************************************************************************/
2632 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2633 /******************************************************************************/
2636 * Function called to notify a client about the socket
2637 * being ready to queue more data. "buf" will be
2638 * NULL and "size" zero if the socket was closed for
2639 * writing in the meantime.
2641 * @param cls closure
2642 * @param size number of bytes available in buf
2643 * @param buf where the callee should write the message
2644 * @return number of bytes written to buf
2647 send_core_create_path (void *cls, size_t size, void *buf)
2649 struct MeshPathInfo *info = cls;
2650 struct GNUNET_MESH_ManipulatePath *msg;
2651 struct GNUNET_PeerIdentity *peer_ptr;
2652 struct MeshPeerInfo *peer = info->peer;
2653 struct MeshTunnel *t = info->t;
2654 struct MeshPeerPath *p = info->path;
2658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
2660 sizeof (struct GNUNET_MESH_ManipulatePath) +
2661 p->length * sizeof (struct GNUNET_PeerIdentity);
2663 if (size < size_needed || NULL == buf)
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "create path retransmit!\n");
2666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " buf: %p\n", buf);
2667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " size: (%u/%u)\n", size,
2669 info->peer->core_transmit[info->pos] =
2670 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2671 GNUNET_TIME_UNIT_FOREVER_REL,
2672 tree_get_first_hop (t->tree,
2674 size_needed, &send_core_create_path,
2678 info->peer->core_transmit[info->pos] = NULL;
2681 struct GNUNET_PeerIdentity id;
2683 GNUNET_PEER_resolve (peer->id, &id);
2684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2685 "MESH: setting core_transmit %s [%u] to NULL\n",
2686 GNUNET_i2s (&id), info->pos);
2689 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2690 msg->header.size = htons (size_needed);
2691 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2692 msg->tid = ntohl (t->id.tid);
2694 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2695 for (i = 0; i < p->length; i++)
2697 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2704 "MESH: CREATE PATH (%u bytes long) sent!\n", size_needed);
2710 * Function called to notify a client about the socket
2711 * being ready to queue more data. "buf" will be
2712 * NULL and "size" zero if the socket was closed for
2713 * writing in the meantime.
2715 * @param cls closure (data itself)
2716 * @param size number of bytes available in buf
2717 * @param buf where the callee should write the message
2719 * @return number of bytes written to buf
2722 send_core_data_multicast (void *cls, size_t size, void *buf)
2724 struct MeshTransmissionDescriptor *info = cls;
2727 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
2728 GNUNET_assert (NULL != info);
2729 GNUNET_assert (NULL != info->peer);
2730 total_size = info->mesh_data->data_len;
2731 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2733 if (total_size > size)
2736 struct GNUNET_PeerIdentity id;
2738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2739 "MESH: Multicast: retransmitting... (%u/%u)\n", size,
2741 GNUNET_PEER_resolve (info->peer->id, &id);
2742 info->peer->core_transmit[info->handler_n] =
2743 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2744 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2746 &send_core_data_multicast, info);
2749 info->peer->core_transmit[info->handler_n] = NULL;
2750 info->peer->infos[info->handler_n] = NULL;
2751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
2752 memcpy (buf, info->mesh_data->data, total_size);
2755 struct GNUNET_MESH_Multicast *mc;
2756 struct GNUNET_MessageHeader *mh;
2759 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2761 mc = (struct GNUNET_MESH_Multicast *) mh;
2762 mh = (struct GNUNET_MessageHeader *) &mc[1];
2763 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2764 "MESH: multicast, payload type %u\n", ntohs (mh->type));
2765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2766 "MESH: multicast, payload size %u\n", ntohs (mh->size));
2770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %u\n",
2775 data_descriptor_decrement_multicast (info->mesh_data);
2776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
2778 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
2784 * Function called to notify a client about the socket
2785 * being ready to queue more data. "buf" will be
2786 * NULL and "size" zero if the socket was closed for
2787 * writing in the meantime.
2789 * @param cls closure (MeshTransmissionDescriptor)
2790 * @param size number of bytes available in buf
2791 * @param buf where the callee should write the message
2792 * @return number of bytes written to buf
2795 send_core_path_ack (void *cls, size_t size, void *buf)
2797 struct MeshTransmissionDescriptor *info = cls;
2798 struct GNUNET_MESH_PathACK *msg = buf;
2800 GNUNET_assert (NULL != info);
2803 info->peer->core_transmit[info->handler_n] = NULL;
2805 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2810 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2811 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2812 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2813 msg->tid = htonl (info->origin->tid);
2814 msg->peer_id = my_full_id;
2816 /* TODO add signature */
2818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
2819 return sizeof (struct GNUNET_MESH_PathACK);
2823 /******************************************************************************/
2824 /******************** MESH NETWORK HANDLERS **************************/
2825 /******************************************************************************/
2829 * Core handler for path creation
2831 * @param cls closure
2832 * @param message message
2833 * @param peer peer identity this notification is about
2834 * @param atsi performance data
2835 * @param atsi_count number of records in 'atsi'
2837 * @return GNUNET_OK to keep the connection open,
2838 * GNUNET_SYSERR to close it (signal serious error)
2841 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2842 const struct GNUNET_MessageHeader *message,
2843 const struct GNUNET_ATS_Information *atsi,
2844 unsigned int atsi_count)
2846 unsigned int own_pos;
2849 MESH_TunnelNumber tid;
2850 struct GNUNET_MESH_ManipulatePath *msg;
2851 struct GNUNET_PeerIdentity *pi;
2852 GNUNET_HashCode hash;
2853 struct MeshPeerPath *path;
2854 struct MeshPeerInfo *dest_peer_info;
2855 struct MeshPeerInfo *orig_peer_info;
2856 struct MeshTunnel *t;
2858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2859 "MESH: Received a path create msg [%s]\n",
2860 GNUNET_i2s (&my_full_id));
2861 size = ntohs (message->size);
2862 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2864 GNUNET_break_op (0);
2868 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2869 if (size % sizeof (struct GNUNET_PeerIdentity))
2871 GNUNET_break_op (0);
2874 size /= sizeof (struct GNUNET_PeerIdentity);
2877 GNUNET_break_op (0);
2880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
2881 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2883 tid = ntohl (msg->tid);
2884 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2886 "MESH: path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
2887 t = tunnel_get (pi, tid);
2890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
2891 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2892 t->id.oid = GNUNET_PEER_intern (pi);
2894 while (NULL != tunnel_get_incoming (next_local_tid))
2895 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2896 t->local_tid_dest = next_local_tid++;
2897 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2898 t->tree = tree_new (t->id.oid);
2900 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2902 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2903 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2909 tunnel_reset_timeout (t);
2910 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2912 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2913 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2921 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2922 if (NULL == dest_peer_info)
2924 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2925 "MESH: Creating PeerInfo for destination.\n");
2926 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2927 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2928 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2930 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2932 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2933 if (NULL == orig_peer_info)
2935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2936 "MESH: Creating PeerInfo for origin.\n");
2937 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2938 orig_peer_info->id = GNUNET_PEER_intern (pi);
2939 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2940 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
2943 path = path_new (size);
2945 for (i = 0; i < size; i++)
2947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
2948 GNUNET_i2s (&pi[i]));
2949 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2950 if (path->peers[i] == myid)
2953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
2956 /* cannot be self, must be 'not found' */
2957 /* create path: self not found in path through self */
2958 GNUNET_break_op (0);
2959 path_destroy (path);
2960 /* FIXME error. destroy tunnel? leave for timeout? */
2963 path_add_to_peers (path, GNUNET_NO);
2964 tunnel_add_path (t, path, own_pos);
2965 if (own_pos == size - 1)
2967 /* It is for us! Send ack. */
2968 struct MeshTransmissionDescriptor *info;
2971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
2972 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
2973 if (NULL == t->peers)
2975 /* New tunnel! Notify clients on data. */
2976 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
2978 GNUNET_break (GNUNET_OK ==
2979 GNUNET_CONTAINER_multihashmap_put (t->peers,
2980 &my_full_id.hashPubKey,
2983 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
2984 /* FIXME use send_message */
2985 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2986 info->origin = &t->id;
2987 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2988 GNUNET_assert (NULL != info->peer);
2989 j = peer_info_transmit_slot (info->peer);
2990 info->handler_n = j;
2991 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2992 info->peer->infos[j] = info;
2993 info->peer->core_transmit[j] =
2994 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2995 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2996 sizeof (struct GNUNET_MESH_PathACK),
2997 &send_core_path_ack, info);
3001 struct MeshPeerPath *path2;
3003 /* It's for somebody else! Retransmit. */
3004 path2 = path_duplicate (path);
3005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3006 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3007 path2 = path_duplicate (path);
3008 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
3009 send_create_path (dest_peer_info, path, t);
3016 * Core handler for path destruction
3018 * @param cls closure
3019 * @param message message
3020 * @param peer peer identity this notification is about
3021 * @param atsi performance data
3022 * @param atsi_count number of records in 'atsi'
3024 * @return GNUNET_OK to keep the connection open,
3025 * GNUNET_SYSERR to close it (signal serious error)
3028 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3029 const struct GNUNET_MessageHeader *message,
3030 const struct GNUNET_ATS_Information *atsi,
3031 unsigned int atsi_count)
3033 struct GNUNET_MESH_ManipulatePath *msg;
3034 struct GNUNET_PeerIdentity *pi;
3035 struct MeshPeerPath *path;
3036 struct MeshTunnel *t;
3037 unsigned int own_pos;
3041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3042 "MESH: Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
3043 size = ntohs (message->size);
3044 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
3046 GNUNET_break_op (0);
3050 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
3051 if (size % sizeof (struct GNUNET_PeerIdentity))
3053 GNUNET_break_op (0);
3056 size /= sizeof (struct GNUNET_PeerIdentity);
3059 GNUNET_break_op (0);
3062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3064 msg = (struct GNUNET_MESH_ManipulatePath *) message;
3065 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3067 "MESH: path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
3069 t = tunnel_get (pi, ntohl (msg->tid));
3072 /* TODO notify back: we don't know this tunnel */
3073 GNUNET_break_op (0);
3076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3077 path = path_new (size);
3079 for (i = 0; i < size; i++)
3081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3082 GNUNET_i2s (&pi[i]));
3083 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3084 if (path->peers[i] == myid)
3087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3088 if (own_pos < path->length - 1)
3089 send_message (message, &pi[own_pos + 1]);
3091 send_client_tunnel_disconnect(t, NULL);
3093 tunnel_delete_peer (t, path->peers[path->length - 1]);
3094 path_destroy (path);
3100 * Core handler for notifications of broken paths
3102 * @param cls closure
3103 * @param message message
3104 * @param peer peer identity this notification is about
3105 * @param atsi performance data
3106 * @param atsi_count number of records in 'atsi'
3108 * @return GNUNET_OK to keep the connection open,
3109 * GNUNET_SYSERR to close it (signal serious error)
3112 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3113 const struct GNUNET_MessageHeader *message,
3114 const struct GNUNET_ATS_Information *atsi,
3115 unsigned int atsi_count)
3117 struct GNUNET_MESH_PathBroken *msg;
3118 struct MeshTunnel *t;
3120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3121 "MESH: Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3122 msg = (struct GNUNET_MESH_PathBroken *) message;
3123 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3124 GNUNET_i2s (&msg->peer1));
3125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3126 GNUNET_i2s (&msg->peer2));
3127 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3130 GNUNET_break_op (0);
3133 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3134 GNUNET_PEER_search (&msg->peer2));
3141 * Core handler for tunnel destruction
3143 * @param cls closure
3144 * @param message message
3145 * @param peer peer identity this notification is about
3146 * @param atsi performance data
3147 * @param atsi_count number of records in 'atsi'
3149 * @return GNUNET_OK to keep the connection open,
3150 * GNUNET_SYSERR to close it (signal serious error)
3153 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3154 const struct GNUNET_MessageHeader *message,
3155 const struct GNUNET_ATS_Information *atsi,
3156 unsigned int atsi_count)
3158 struct GNUNET_MESH_TunnelDestroy *msg;
3159 struct MeshTunnel *t;
3161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3162 "MESH: Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
3163 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
3165 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3166 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3169 /* Probably already got the message from another path,
3170 * destroyed the tunnel and retransmitted to children.
3175 if (t->id.oid == myid)
3177 GNUNET_break_op (0);
3180 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3182 /* Tunnel was incoming, notify clients */
3183 send_clients_tunnel_destroy (t);
3185 tunnel_send_destroy (t);
3192 * Core handler for mesh network traffic going from the origin to a peer
3194 * @param cls closure
3195 * @param peer peer identity this notification is about
3196 * @param message message
3197 * @param atsi performance data
3198 * @param atsi_count number of records in 'atsi'
3199 * @return GNUNET_OK to keep the connection open,
3200 * GNUNET_SYSERR to close it (signal serious error)
3203 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3204 const struct GNUNET_MessageHeader *message,
3205 const struct GNUNET_ATS_Information *atsi,
3206 unsigned int atsi_count)
3208 struct GNUNET_MESH_Unicast *msg;
3209 struct MeshTunnel *t;
3213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3215 size = ntohs (message->size);
3217 sizeof (struct GNUNET_MESH_Unicast) +
3218 sizeof (struct GNUNET_MessageHeader))
3223 msg = (struct GNUNET_MESH_Unicast *) message;
3224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
3225 ntohs (msg[1].header.type));
3226 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3229 /* TODO notify back: we don't know this tunnel */
3230 GNUNET_break_op (0);
3233 tunnel_reset_timeout (t);
3234 pid = GNUNET_PEER_search (&msg->destination);
3237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3238 "MESH: it's for us! sending to clients...\n");
3239 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
3242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3243 "MESH: not for us, retransmitting...\n");
3244 send_message (message, tree_get_first_hop (t->tree, pid));
3250 * Core handler for mesh network traffic going from the origin to all peers
3252 * @param cls closure
3253 * @param message message
3254 * @param peer peer identity this notification is about
3255 * @param atsi performance data
3256 * @param atsi_count number of records in 'atsi'
3257 * @return GNUNET_OK to keep the connection open,
3258 * GNUNET_SYSERR to close it (signal serious error)
3260 * TODO: Check who we got this from, to validate route.
3263 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3264 const struct GNUNET_MessageHeader *message,
3265 const struct GNUNET_ATS_Information *atsi,
3266 unsigned int atsi_count)
3268 struct GNUNET_MESH_Multicast *msg;
3269 struct MeshTunnel *t;
3272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
3274 size = ntohs (message->size);
3275 if (sizeof (struct GNUNET_MESH_Multicast) +
3276 sizeof (struct GNUNET_MessageHeader) > size)
3278 GNUNET_break_op (0);
3281 msg = (struct GNUNET_MESH_Multicast *) message;
3282 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3286 /* TODO notify that we dont know that tunnel */
3287 GNUNET_break_op (0);
3290 if (t->mid == ntohl (msg->mid))
3292 /* FIXME: already seen this packet, log dropping */
3293 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3294 "MESH: Already seen mid %u, DROPPING!\n", t->mid);
3299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3300 "MESH: mid %u not seen yet, forwarding\n", ntohl (msg->mid));
3302 t->mid = ntohl (msg->mid);
3303 tunnel_reset_timeout (t);
3305 /* Transmit to locally interested clients */
3306 if (NULL != t->peers &&
3307 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
3309 send_subscribed_clients (message, &msg[1].header);
3311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
3312 if (ntohl (msg->ttl) == 0)
3314 /* FIXME: ttl is 0, log dropping */
3315 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
3318 tunnel_send_multicast (t, message, GNUNET_NO);
3324 * Core handler for mesh network traffic toward the owner of a tunnel
3326 * @param cls closure
3327 * @param message message
3328 * @param peer peer identity this notification is about
3329 * @param atsi performance data
3330 * @param atsi_count number of records in 'atsi'
3332 * @return GNUNET_OK to keep the connection open,
3333 * GNUNET_SYSERR to close it (signal serious error)
3336 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3337 const struct GNUNET_MessageHeader *message,
3338 const struct GNUNET_ATS_Information *atsi,
3339 unsigned int atsi_count)
3341 struct GNUNET_MESH_ToOrigin *msg;
3342 struct GNUNET_PeerIdentity id;
3343 struct MeshPeerInfo *peer_info;
3344 struct MeshTunnel *t;
3347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
3349 size = ntohs (message->size);
3350 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3351 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3353 GNUNET_break_op (0);
3356 msg = (struct GNUNET_MESH_ToOrigin *) message;
3357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
3358 ntohs (msg[1].header.type));
3359 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3363 /* TODO notify that we dont know this tunnel (whom)? */
3364 GNUNET_break_op (0);
3368 if (t->id.oid == myid)
3371 struct GNUNET_MESH_ToOrigin *copy;
3373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3374 "MESH: it's for us! sending to clients...\n");
3375 if (NULL == t->owner)
3377 /* got data packet for ownerless tunnel */
3378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no clients!\n");
3379 GNUNET_break_op (0);
3382 /* TODO signature verification */
3383 memcpy (cbuf, message, size);
3384 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3385 copy->tid = htonl (t->local_tid);
3386 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3387 ©->header, GNUNET_YES);
3390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3391 "MESH: not for us, retransmitting...\n");
3393 peer_info = peer_info_get (&msg->oid);
3394 if (NULL == peer_info)
3396 /* unknown origin of tunnel */
3400 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3401 send_message (message, &id);
3408 * Core handler for path ACKs
3410 * @param cls closure
3411 * @param message message
3412 * @param peer peer identity this notification is about
3413 * @param atsi performance data
3414 * @param atsi_count number of records in 'atsi'
3416 * @return GNUNET_OK to keep the connection open,
3417 * GNUNET_SYSERR to close it (signal serious error)
3420 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3421 const struct GNUNET_MessageHeader *message,
3422 const struct GNUNET_ATS_Information *atsi,
3423 unsigned int atsi_count)
3425 struct GNUNET_MESH_PathACK *msg;
3426 struct GNUNET_PeerIdentity id;
3427 struct MeshPeerInfo *peer_info;
3428 struct MeshPeerPath *p;
3429 struct MeshTunnel *t;
3431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3432 GNUNET_i2s (&my_full_id));
3433 msg = (struct GNUNET_MESH_PathACK *) message;
3434 t = tunnel_get (&msg->oid, msg->tid);
3437 /* TODO notify that we don't know the tunnel */
3441 peer_info = peer_info_get (&msg->peer_id);
3443 /* Add paths to peers? */
3444 p = tree_get_path_to_peer (t->tree, peer_info->id);
3447 path_add_to_peers (p, GNUNET_YES);
3455 /* Message for us? */
3456 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3459 if (NULL == t->owner)
3461 GNUNET_break_op (0);
3464 if (NULL != t->dht_get_type)
3466 GNUNET_DHT_get_stop (t->dht_get_type);
3467 t->dht_get_type = NULL;
3469 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
3471 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
3472 send_client_peer_connected (t, peer_info->id);
3477 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3478 "MESH: not for us, retransmitting...\n");
3479 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3480 peer_info = peer_info_get (&msg->oid);
3481 if (NULL == peer_info)
3483 /* If we know the tunnel, we should DEFINITELY know the peer */
3487 send_message (message, &id);
3493 * Functions to handle messages from core
3495 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3496 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3497 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3498 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3499 sizeof (struct GNUNET_MESH_PathBroken)},
3500 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3501 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3502 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3503 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3504 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3505 sizeof (struct GNUNET_MESH_PathACK)},
3511 /******************************************************************************/
3512 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3513 /******************************************************************************/
3516 * deregister_app: iterator for removing each application registered by a client
3518 * @param cls closure
3519 * @param key the hash of the application id (used to access the hashmap)
3520 * @param value the value stored at the key (client)
3522 * @return GNUNET_OK on success
3525 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3527 GNUNET_break (GNUNET_YES ==
3528 GNUNET_CONTAINER_multihashmap_remove (applications, key,
3535 * notify_client_connection_failure: notify a client that the connection to the
3536 * requested remote peer is not possible (for instance, no route found)
3537 * Function called when the socket is ready to queue more data. "buf" will be
3538 * NULL and "size" zero if the socket was closed for writing in the meantime.
3540 * @param cls closure
3541 * @param size number of bytes available in buf
3542 * @param buf where the callee should write the message
3543 * @return number of bytes written to buf
3546 notify_client_connection_failure (void *cls, size_t size, void *buf)
3549 struct MeshPeerInfo *peer_info;
3550 struct GNUNET_MESH_PeerControl *msg;
3551 struct GNUNET_PeerIdentity id;
3553 if (0 == size && NULL == buf)
3555 // TODO retry? cancel?
3559 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3560 peer_info = (struct MeshPeerInfo *) cls;
3561 msg = (struct GNUNET_MESH_PeerControl *) buf;
3562 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3563 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3564 // msg->tunnel_id = htonl(peer_info->t->tid);
3565 GNUNET_PEER_resolve (peer_info->id, &id);
3566 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3574 * Send keepalive packets for a peer
3576 * @param cls Closure (tunnel for which to send the keepalive).
3577 * @param tc Notification context.
3579 * TODO: implement explicit multicast keepalive?
3582 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3584 struct MeshTunnel *t = cls;
3585 struct GNUNET_MessageHeader *payload;
3586 struct GNUNET_MESH_Multicast *msg;
3588 sizeof (struct GNUNET_MESH_Multicast) +
3589 sizeof (struct GNUNET_MessageHeader);
3592 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3596 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3599 "MESH: sending keepalive for tunnel %d\n", t->id.tid);
3601 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3602 msg->header.size = htons (size);
3603 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3604 msg->oid = my_full_id;
3605 msg->tid = htonl (t->id.tid);
3606 msg->ttl = htonl (DEFAULT_TTL);
3607 msg->mid = htonl (t->mid + 1);
3609 payload = (struct GNUNET_MessageHeader *) &msg[1];
3610 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
3611 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3612 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
3614 t->path_refresh_task =
3615 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
3621 * Function to process paths received for a new peer addition. The recorded
3622 * paths form the initial tunnel, which can be optimized later.
3623 * Called on each result obtained for the DHT search.
3625 * @param cls closure
3626 * @param exp when will this value expire
3627 * @param key key of the result
3628 * @param get_path path of the get request
3629 * @param get_path_length lenght of get_path
3630 * @param put_path path of the put request
3631 * @param put_path_length length of the put_path
3632 * @param type type of the result
3633 * @param size number of bytes in data
3634 * @param data pointer to the result data
3636 * TODO: re-issue the request after certain time? cancel after X results?
3639 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3640 const GNUNET_HashCode * key,
3641 const struct GNUNET_PeerIdentity *get_path,
3642 unsigned int get_path_length,
3643 const struct GNUNET_PeerIdentity *put_path,
3644 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3645 size_t size, const void *data)
3647 struct MeshPathInfo *path_info = cls;
3648 struct MeshPeerPath *p;
3649 struct GNUNET_PeerIdentity pi;
3652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
3653 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
3656 p = path_build_from_dht (get_path, get_path_length, put_path,
3658 path_add_to_peers (p, GNUNET_NO);
3660 for (i = 0; i < path_info->peer->ntunnels; i++)
3662 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3663 peer_info_connect (path_info->peer, path_info->t);
3671 * Function to process paths received for a new peer addition. The recorded
3672 * paths form the initial tunnel, which can be optimized later.
3673 * Called on each result obtained for the DHT search.
3675 * @param cls closure
3676 * @param exp when will this value expire
3677 * @param key key of the result
3678 * @param get_path path of the get request
3679 * @param get_path_length lenght of get_path
3680 * @param put_path path of the put request
3681 * @param put_path_length length of the put_path
3682 * @param type type of the result
3683 * @param size number of bytes in data
3684 * @param data pointer to the result data
3687 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3688 const GNUNET_HashCode * key,
3689 const struct GNUNET_PeerIdentity *get_path,
3690 unsigned int get_path_length,
3691 const struct GNUNET_PeerIdentity *put_path,
3692 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3693 size_t size, const void *data)
3695 const struct GNUNET_PeerIdentity *pi = data;
3696 struct MeshTunnel *t = cls;
3697 struct MeshPeerInfo *peer_info;
3698 struct MeshPeerPath *p;
3700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
3701 if (size != sizeof (struct GNUNET_PeerIdentity))
3703 GNUNET_break_op (0);
3706 GNUNET_assert (NULL != t->owner);
3707 peer_info = peer_info_get (pi);
3708 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
3710 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3712 p = path_build_from_dht (get_path, get_path_length, put_path,
3714 path_add_to_peers (p, GNUNET_NO);
3716 tunnel_add_peer (t, peer_info);
3717 peer_info_connect (peer_info, t);
3721 /******************************************************************************/
3722 /********************* MESH LOCAL HANDLES **************************/
3723 /******************************************************************************/
3727 * Handler for client disconnection
3729 * @param cls closure
3730 * @param client identification of the client; NULL
3731 * for the last call when the server is destroyed
3734 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3736 struct MeshClient *c;
3737 struct MeshClient *next;
3739 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
3742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
3748 if (c->handle != client)
3750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
3754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
3756 GNUNET_SERVER_client_drop (c->handle);
3757 c->shutting_down = GNUNET_YES;
3758 GNUNET_assert (NULL != c->own_tunnels);
3759 GNUNET_assert (NULL != c->incoming_tunnels);
3760 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3761 &tunnel_destroy_iterator, c);
3762 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3763 &tunnel_destroy_iterator, c);
3764 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
3765 &tunnel_destroy_iterator, c);
3766 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3767 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3768 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
3770 /* deregister clients applications */
3771 if (NULL != c->apps)
3773 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3774 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3776 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3777 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3779 GNUNET_SCHEDULER_cancel (announce_applications_task);
3780 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3782 if (NULL != c->types)
3783 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3785 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
3790 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
3796 * Handler for new clients
3798 * @param cls closure
3799 * @param client identification of the client
3800 * @param message the actual message, which includes messages the client wants
3803 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3804 const struct GNUNET_MessageHeader *message)
3806 struct GNUNET_MESH_ClientConnect *cc_msg;
3807 struct MeshClient *c;
3808 GNUNET_MESH_ApplicationType *a;
3815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
3816 /* Check data sanity */
3817 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3818 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3819 ntypes = ntohs (cc_msg->types);
3820 napps = ntohs (cc_msg->applications);
3822 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3825 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3829 /* Create new client structure */
3830 c = GNUNET_malloc (sizeof (struct MeshClient));
3831 c->id = next_client_id++;
3832 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
3834 GNUNET_SERVER_client_keep (client);
3835 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3838 GNUNET_MESH_ApplicationType at;
3841 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3842 for (i = 0; i < napps; i++)
3845 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
3846 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3847 /* store in clients hashmap */
3848 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3849 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3850 /* store in global hashmap, for announcements */
3851 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3852 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3854 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3855 announce_applications_task =
3856 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3864 t = (uint16_t *) & a[napps];
3865 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3866 for (i = 0; i < ntypes; i++)
3869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
3870 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3872 /* store in clients hashmap */
3873 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3874 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3875 /* store in global hashmap */
3876 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3877 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3881 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3883 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3884 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3885 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3886 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3887 GNUNET_SERVER_notification_context_add (nc, client);
3889 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
3895 * Handler for requests of new tunnels
3897 * @param cls closure
3898 * @param client identification of the client
3899 * @param message the actual message
3902 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3903 const struct GNUNET_MessageHeader *message)
3905 struct GNUNET_MESH_TunnelMessage *t_msg;
3906 struct MeshTunnel *t;
3907 struct MeshClient *c;
3908 GNUNET_HashCode hash;
3910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
3912 /* Sanity check for client registration */
3913 if (NULL == (c = client_get (client)))
3916 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3921 /* Message sanity check */
3922 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3925 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3929 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3930 /* Sanity check for tunnel numbering */
3931 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3934 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3937 /* Sanity check for duplicate tunnel IDs */
3938 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3941 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3945 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3946 while (NULL != tunnel_get_by_pi (myid, next_tid))
3947 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3948 t->id.tid = next_tid++;
3949 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3951 t->local_tid = ntohl (t_msg->tunnel_id);
3952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
3953 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
3955 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3957 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3959 GNUNET_CONTAINER_multihashmap_put (c->own_tunnels, &hash, t,
3960 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3963 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3967 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3969 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3970 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3973 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3976 t->tree = tree_new (myid);
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 "MESH: 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 send_client_tunnel_disconnect(t, c);
4032 client_ignore_tunnel (c, t);
4034 // TODO: when to destroy incoming tunnel?
4035 if (t->nclients == 0)
4037 GNUNET_assert (GNUNET_YES ==
4038 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
4040 GNUNET_assert (GNUNET_YES ==
4041 GNUNET_CONTAINER_multihashmap_remove (t->peers,
4042 &my_full_id.hashPubKey,
4046 GNUNET_SERVER_receive_done (client, GNUNET_OK);
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 "MESH: 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)];
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 "MESH: 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 "MESH: 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)];
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 "MESH: 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 "MESH: 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)];
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 "MESH: 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 ("MESH: Peer connected\n");
4619 DEBUG_CONN ("MESH: %s\n", GNUNET_i2s (&my_full_id));
4620 peer_info = peer_info_get (peer);
4621 if (myid == peer_info->id)
4623 DEBUG_CONN ("MESH: (self)\n");
4628 DEBUG_CONN ("MESH: %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 ("MESH: 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 ("MESH: (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");