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 DEBUG ("MESH: %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, "MESH: Sending to clients...\n");
974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: 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, "MESH: 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, "MESH: 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 dd Data Descriptor used in a multicast message. Freed if needed.
1176 data_descriptor_decrement_multicast (struct MeshData *mesh_data)
1178 /* Make sure it's a multicast packet */
1179 GNUNET_assert (NULL != mesh_data->reference_counter);
1181 if (0 == --(*(mesh_data->reference_counter)))
1183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
1184 if (NULL != mesh_data->task)
1186 if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
1188 GNUNET_SCHEDULER_cancel (*(mesh_data->task));
1189 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
1190 GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
1192 GNUNET_free (mesh_data->task);
1194 GNUNET_free (mesh_data->reference_counter);
1195 GNUNET_free (mesh_data->data);
1196 GNUNET_free (mesh_data);
1202 * Cancel a core transmission that was already requested and free all resources
1203 * associated to the request.
1205 * @param peer PeeInfo of the peer whose transmission is cancelled.
1206 * @param i Position of the transmission to be cancelled.
1209 peer_info_cancel_transmission (struct MeshPeerInfo *peer, unsigned int i)
1211 if (NULL != peer->core_transmit[i])
1213 struct MeshTransmissionDescriptor *dd;
1214 struct MeshPathInfo *path_info;
1218 struct GNUNET_PeerIdentity id;
1220 GNUNET_PEER_resolve (peer->id, &id);
1221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1222 "MESH: Cancelling data transmission at %s [%u]\n",
1223 GNUNET_i2s (&id), i);
1224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message type %u\n",
1228 /* TODO: notify that tranmission has failed */
1229 switch (peer->types[i])
1231 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
1232 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1233 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
1235 dd = peer->infos[i];
1236 data_descriptor_decrement_multicast (dd->mesh_data);
1238 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
1239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
1240 path_info = peer->infos[i];
1241 path_destroy (path_info->path);
1245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
1247 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
1248 peer->core_transmit[i] = NULL;
1249 GNUNET_free (peer->infos[i]);
1255 * Get a unused CORE slot to transmit a message to a peer. If all the slots
1256 * are used, cancel one and return it's position.
1258 * @param peer PeerInfo of the neighbor we want to transmit to.
1260 * @return The index of an available slot to transmit to the neighbor.
1263 peer_info_transmit_slot (struct MeshPeerInfo *peer)
1267 for (i = 0; peer->core_transmit[i]; i++)
1269 if (i == (CORE_QUEUE_SIZE - 1))
1271 /* All positions are taken! Overwriting! */
1273 peer_info_cancel_transmission (peer, 0);
1282 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1283 * and insert it in the appropiate structures if the peer is not known yet.
1285 * @param peer Full identity of the peer.
1287 * @return Existing or newly created peer info.
1289 static struct MeshPeerInfo *
1290 peer_info_get (const struct GNUNET_PeerIdentity *peer)
1292 struct MeshPeerInfo *peer_info;
1294 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1295 if (NULL == peer_info)
1298 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1299 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1300 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
1301 peer_info->id = GNUNET_PEER_intern (peer);
1309 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1310 * and insert it in the appropiate structures if the peer is not known yet.
1312 * @param peer Short identity of the peer.
1314 * @return Existing or newly created peer info.
1316 static struct MeshPeerInfo *
1317 peer_info_get_short (const GNUNET_PEER_Id peer)
1319 struct GNUNET_PeerIdentity id;
1321 GNUNET_PEER_resolve (peer, &id);
1322 return peer_info_get (&id);
1327 * Iterator to remove the tunnel from the list of tunnels a peer participates
1330 * @param cls Closure (tunnel info)
1331 * @param key GNUNET_PeerIdentity of the peer (unused)
1332 * @param value PeerInfo of the peer
1334 * @return always GNUNET_YES, to keep iterating
1337 peer_info_delete_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
1339 struct MeshTunnel *t = cls;
1340 struct MeshPeerInfo *peer = value;
1343 for (i = 0; i < peer->ntunnels; i++)
1346 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1349 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1350 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1359 * Core callback to write a
1361 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1362 * @param size Number of bytes available in buf.
1363 * @param buf Where the to write the message.
1365 * @return number of bytes written to buf
1368 send_core_data_raw (void *cls, size_t size, void *buf)
1370 struct MeshTransmissionDescriptor *info = cls;
1371 struct GNUNET_MessageHeader *msg;
1374 GNUNET_assert (NULL != info);
1375 GNUNET_assert (NULL != info->mesh_data);
1376 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
1377 total_size = ntohs (msg->size);
1379 if (total_size > size)
1381 struct GNUNET_PeerIdentity id;
1383 GNUNET_PEER_resolve (info->peer->id, &id);
1384 info->peer->core_transmit[info->handler_n] =
1385 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1386 GNUNET_TIME_UNIT_FOREVER_REL, &id,
1387 size, &send_core_data_raw, info);
1390 info->peer->core_transmit[info->handler_n] = NULL;
1391 memcpy (buf, msg, total_size);
1392 GNUNET_free (info->mesh_data);
1399 * Sends an already built message to a peer, properly registrating
1400 * all used resources.
1402 * @param message Message to send. Fucntion makes a copy of it.
1403 * @param peer Short ID of the neighbor whom to send the message.
1408 send_message (const struct GNUNET_MessageHeader *message,
1409 const struct GNUNET_PeerIdentity *peer)
1411 struct MeshTransmissionDescriptor *info;
1412 struct MeshPeerInfo *neighbor;
1413 struct MeshPeerPath *p;
1417 // GNUNET_TRANSPORT_try_connect();
1419 size = ntohs (message->size);
1420 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
1421 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
1422 info->mesh_data->data = GNUNET_malloc (size);
1423 memcpy (info->mesh_data->data, message, size);
1424 info->mesh_data->data_len = size;
1425 neighbor = peer_info_get (peer);
1426 for (p = neighbor->path_head; NULL != p; p = p->next)
1436 GNUNET_free (info->mesh_data->data);
1437 GNUNET_free (info->mesh_data);
1441 i = peer_info_transmit_slot (neighbor);
1442 info->handler_n = i;
1443 info->peer = neighbor;
1444 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1445 neighbor->infos[i] = info;
1446 neighbor->core_transmit[i] =
1447 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
1448 GNUNET_TIME_UNIT_FOREVER_REL, peer,
1449 size, &send_core_data_raw, info);
1455 * Sends a CREATE PATH message for a path to a peer, properly registrating
1456 * all used resources.
1458 * @param peer PeerInfo of the final peer for whom this path is being created.
1459 * @param p Path itself.
1460 * @param t Tunnel for which the path is created.
1463 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
1464 struct MeshTunnel *t)
1466 struct GNUNET_PeerIdentity id;
1467 struct MeshPathInfo *path_info;
1468 struct MeshPeerInfo *neighbor;
1473 p = tree_get_path_to_peer (t->tree, peer->id);
1480 for (i = 0; i < p->length; i++)
1482 if (p->peers[i] == myid)
1485 if (i >= p->length - 1)
1491 GNUNET_PEER_resolve (p->peers[i + 1], &id);
1493 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1494 path_info->path = p;
1496 neighbor = peer_info_get (&id);
1497 path_info->peer = neighbor;
1498 path_info->pos = peer_info_transmit_slot (neighbor);
1499 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1500 neighbor->infos[path_info->pos] = path_info;
1501 neighbor->core_transmit[path_info->pos] =
1502 GNUNET_CORE_notify_transmit_ready (core_handle, /* handle */
1505 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1507 sizeof (struct GNUNET_MESH_ManipulatePath) +
1508 (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1509 &send_core_create_path, /* callback */
1510 path_info); /* cls */
1515 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1517 * @param t Tunnel whose path to destroy.
1518 * @param destination Short ID of the peer to whom the path to destroy.
1521 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1523 struct MeshPeerPath *p;
1526 p = tree_get_path_to_peer (t->tree, destination);
1532 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1533 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1535 struct GNUNET_MESH_ManipulatePath *msg;
1536 struct GNUNET_PeerIdentity *pi;
1540 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
1541 msg->header.size = htons (size);
1542 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1543 msg->tid = htonl (t->id.tid);
1544 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1545 for (i = 0; i < p->length; i++)
1547 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
1549 send_message (&msg->header, tree_get_first_hop (t->tree, destination));
1556 * Try to establish a new connection to this peer.
1557 * Use the best path for the given tunnel.
1558 * If the peer doesn't have any path to it yet, try to get one.
1559 * If the peer already has some path, send a CREATE PATH towards it.
1561 * @param peer PeerInfo of the peer.
1562 * @param t Tunnel for which to create the path, if possible.
1565 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1567 struct MeshPeerPath *p;
1568 struct MeshPathInfo *path_info;
1570 if (NULL != peer->path_head)
1572 p = tree_get_path_to_peer (t->tree, peer->id);
1579 // FIXME always send create path to self
1582 send_create_path (peer, p, t);
1586 GNUNET_HashCode hash;
1589 send_client_peer_connected (t, myid);
1590 t->local_tid_dest = next_local_tid++;
1591 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1594 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
1595 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1602 else if (NULL == peer->dhtget)
1604 struct GNUNET_PeerIdentity id;
1606 GNUNET_PEER_resolve (peer->id, &id);
1607 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1608 path_info->peer = peer;
1610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1611 "MESH: Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1612 peer->dhtgetcls = path_info;
1613 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1614 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1615 GNUNET_BLOCK_TYPE_TEST, /* type */
1616 &id.hashPubKey, /* key to search */
1617 4, /* replication level */
1618 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, /* xquery */
1619 0, /* xquery bits */
1620 &dht_get_id_handler, path_info);
1622 /* Otherwise, there is no path but the DHT get is already started. */
1627 * Task to delay the connection of a peer
1629 * @param cls Closure (path info with tunnel and peer to connect).
1630 * Will be free'd on exection.
1631 * @param tc TaskContext
1634 peer_info_connect_task (void *cls,
1635 const struct GNUNET_SCHEDULER_TaskContext *tc)
1637 struct MeshPathInfo *path_info = cls;
1639 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
1644 peer_info_connect (path_info->peer, path_info->t);
1650 * Destroy the peer_info and free any allocated resources linked to it
1652 * @param pi The peer_info to destroy.
1654 * @return GNUNET_OK on success
1657 peer_info_destroy (struct MeshPeerInfo *pi)
1659 struct GNUNET_PeerIdentity id;
1660 struct MeshPeerPath *p;
1661 struct MeshPeerPath *nextp;
1664 GNUNET_PEER_resolve (pi->id, &id);
1665 GNUNET_PEER_change_rc (pi->id, -1);
1668 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1671 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1672 "MESH: removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1674 if (NULL != pi->dhtget)
1676 GNUNET_DHT_get_stop (pi->dhtget);
1677 GNUNET_free (pi->dhtgetcls);
1679 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1681 peer_info_cancel_transmission (pi, i);
1687 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1697 * Remove all paths that rely on a direct connection between p1 and p2
1698 * from the peer itself and notify all tunnels about it.
1700 * @param peer PeerInfo of affected peer.
1701 * @param p1 GNUNET_PEER_Id of one peer.
1702 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1705 * TODO: optimize (see below)
1708 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1711 struct MeshPeerPath *p;
1712 struct MeshPeerPath *aux;
1713 struct MeshPeerInfo *peer_d;
1715 unsigned int destroyed;
1721 p = peer->path_head;
1725 for (i = 0; i < (p->length - 1); i++)
1727 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1728 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1730 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1741 for (i = 0; i < peer->ntunnels; i++)
1743 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1747 * Problem: one or more peers have been deleted from the tunnel tree.
1748 * We don't know who they are to try to add them again.
1749 * We need to try to find a new path for each of the disconnected peers.
1750 * Some of them might already have a path to reach them that does not
1751 * involve p1 and p2. Adding all anew might render in a better tree than
1752 * the trivial immediate fix.
1754 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1755 * its children will be reachable trough him.
1757 peer_d = peer_info_get_short (d);
1760 for (p = peer_d->path_head; NULL != p; p = p->next)
1762 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
1770 /* No callback, as peer will be already disconnected and a connection
1771 * scheduled by tunnel_notify_connection_broken.
1773 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
1777 peer_info_connect (peer_d, peer->tunnels[i]);
1784 * Add the path to the peer and update the path used to reach it in case this
1787 * @param peer_info Destination peer to add the path to.
1788 * @param path New path to add. Last peer must be the peer in arg 1.
1789 * Path will be either used of freed if already known.
1790 * @param trusted Do we trust that this path is real?
1793 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1796 struct MeshPeerPath *aux;
1800 if ((NULL == peer_info) || (NULL == path))
1803 path_destroy (path);
1806 if (path->peers[path->length - 1] != peer_info->id)
1809 path_destroy (path);
1812 if (path->length <= 2 && GNUNET_NO == trusted)
1814 /* Only allow CORE to tell us about direct paths */
1815 path_destroy (path);
1818 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1819 for (l = 1; l < path->length; l++)
1821 if (path->peers[l] == myid)
1823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shortening path by %u\n", l);
1824 for (l2 = 0; l2 < path->length - l; l2++)
1826 path->peers[l2] = path->peers[l + l2];
1831 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1836 struct GNUNET_PeerIdentity id;
1838 GNUNET_PEER_resolve (peer_info->id, &id);
1839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: adding path [%u] to peer %s\n",
1840 path->length, GNUNET_i2s (&id));
1843 l = path_get_length (path);
1850 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1851 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1853 l2 = path_get_length (aux);
1856 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1857 peer_info->path_tail, aux, path);
1862 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1864 path_destroy (path);
1869 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1876 * Add the path to the origin peer and update the path used to reach it in case
1877 * this is the shortest.
1878 * The path is given in peer_info -> destination, therefore we turn the path
1879 * upside down first.
1881 * @param peer_info Peer to add the path to, being the origin of the path.
1882 * @param path New path to add after being inversed.
1883 * @param trusted Do we trust that this path is real?
1886 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1887 struct MeshPeerPath *path, int trusted)
1890 peer_info_add_path (peer_info, path, trusted);
1895 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1896 * to obtain a local peer -> destination path and interning the peer ids.
1898 * @return Newly allocated and created path
1900 static struct MeshPeerPath *
1901 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1902 unsigned int get_path_length,
1903 const struct GNUNET_PeerIdentity *put_path,
1904 unsigned int put_path_length)
1906 struct MeshPeerPath *p;
1912 GNUNET_PEER_change_rc (myid, 1);
1913 i = get_path_length;
1914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1915 for (i--; i >= 0; i--)
1917 id = GNUNET_PEER_intern (&get_path[i]);
1918 if (p->length > 0 && id == p->peers[p->length - 1])
1920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1921 GNUNET_PEER_change_rc (id, -1);
1925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Adding from GET: %s.\n",
1926 GNUNET_i2s (&get_path[i]));
1928 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1929 p->peers[p->length - 1] = id;
1932 i = put_path_length;
1933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1934 for (i--; i >= 0; i--)
1936 id = GNUNET_PEER_intern (&put_path[i]);
1939 /* PUT path went through us, so discard the path up until now and start
1940 * from here to get a much shorter (and loop-free) path.
1945 if (p->length > 0 && id == p->peers[p->length - 1])
1947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1948 GNUNET_PEER_change_rc (id, -1);
1952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Adding from PUT: %s.\n",
1953 GNUNET_i2s (&put_path[i]));
1955 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1956 p->peers[p->length - 1] = id;
1960 if (get_path_length > 0)
1961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (first of GET: %s)\n",
1962 GNUNET_i2s (&get_path[0]));
1963 if (put_path_length > 0)
1964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (first of PUT: %s)\n",
1965 GNUNET_i2s (&put_path[0]));
1966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: In total: %d hops\n",
1968 for (i = 0; i < p->length; i++)
1970 struct GNUNET_PeerIdentity peer_id;
1972 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %u: %s\n", p->peers[i],
1974 GNUNET_i2s (&peer_id));
1982 * Adds a path to the peer_infos of all the peers in the path
1984 * @param p Path to process.
1985 * @param confirmed Whether we know if the path works or not. FIXME use
1988 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1992 /* TODO: invert and add */
1993 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1994 for (i++; i < p->length; i++)
1996 struct MeshPeerInfo *aux;
1997 struct MeshPeerPath *copy;
1999 aux = peer_info_get_short (p->peers[i]);
2000 copy = path_duplicate (p);
2001 copy->length = i + 1;
2002 peer_info_add_path (aux, copy, GNUNET_NO);
2008 * Send keepalive packets for a peer
2010 * @param cls Closure (tunnel for which to send the keepalive).
2011 * @param tc Notification context.
2013 * TODO: implement explicit multicast keepalive?
2016 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2020 * Search for a tunnel among the incoming tunnels
2022 * @param tid the local id of the tunnel
2024 * @return tunnel handler, NULL if doesn't exist
2026 static struct MeshTunnel *
2027 tunnel_get_incoming (MESH_TunnelNumber tid)
2029 GNUNET_HashCode hash;
2031 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2032 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2033 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2038 * Search for a tunnel among the tunnels for a client
2040 * @param c the client whose tunnels to search in
2041 * @param tid the local id of the tunnel
2043 * @return tunnel handler, NULL if doesn't exist
2045 static struct MeshTunnel *
2046 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2048 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2050 return tunnel_get_incoming (tid);
2054 GNUNET_HashCode hash;
2056 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2057 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2063 * Search for a tunnel by global ID using PEER_ID
2065 * @param pi owner of the tunnel
2066 * @param tid global tunnel number
2068 * @return tunnel handler, NULL if doesn't exist
2070 static struct MeshTunnel *
2071 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2073 struct MESH_TunnelID id;
2074 GNUNET_HashCode hash;
2079 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2080 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2085 * Search for a tunnel by global ID using full PeerIdentities
2087 * @param oid owner of the tunnel
2088 * @param tid global tunnel number
2090 * @return tunnel handler, NULL if doesn't exist
2092 static struct MeshTunnel *
2093 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2095 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2100 * Delete an active client from the tunnel.
2106 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
2110 for (i = 0; i < t->nclients; i++)
2112 if (t->clients[i] == c)
2114 t->clients[i] = t->clients[t->nclients - 1];
2115 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
2123 * Delete an ignored client from the tunnel.
2129 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
2133 for (i = 0; i < t->nignore; i++)
2135 if (t->ignore[i] == c)
2137 t->ignore[i] = t->ignore[t->nignore - 1];
2138 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
2146 * Delete a client from the tunnel. It should be only done on
2147 * client disconnection, otherwise use client_ignore_tunnel.
2153 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
2155 tunnel_delete_ignored_client (t, c);
2156 tunnel_delete_active_client (t, c);
2161 * Callback used to notify a client owner of a tunnel that a peer has
2162 * disconnected, most likely because of a path change.
2164 * @param cls Closure (tunnel this notification is about).
2165 * @param peer_id Short ID of disconnected peer.
2168 notify_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
2170 struct MeshTunnel *t = cls;
2171 struct MeshPeerInfo *peer;
2172 struct MeshPathInfo *path_info;
2174 if (NULL != t->owner && NULL != nc)
2176 struct GNUNET_MESH_PeerControl msg;
2178 msg.header.size = htons (sizeof (msg));
2179 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2180 msg.tunnel_id = htonl (t->local_tid);
2181 GNUNET_PEER_resolve (peer_id, &msg.peer);
2182 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2183 &msg.header, GNUNET_NO);
2185 peer = peer_info_get_short (peer_id);
2186 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2187 path_info->peer = peer;
2189 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
2194 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
2195 * needed rescources.
2196 * If peer already exists, reevaluate shortest path and change if different.
2198 * @param t Tunnel we want to add a new peer to
2199 * @param peer PeerInfo of the peer being added
2203 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
2205 struct GNUNET_PeerIdentity id;
2206 struct MeshPeerPath *best_p;
2207 struct MeshPeerPath *p;
2208 unsigned int best_cost;
2211 GNUNET_PEER_resolve (peer->id, &id);
2213 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
2216 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
2217 GNUNET_assert (GNUNET_OK ==
2218 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
2220 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2223 if (NULL != (p = peer->path_head))
2226 best_cost = tree_get_path_cost (t->tree, p);
2229 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
2236 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected, t);
2237 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
2238 t->path_refresh_task =
2239 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
2243 /* Start a DHT get */
2244 peer_info_connect (peer, t);
2249 * Add a path to a tunnel which we don't own, just to remember the next hop.
2250 * If destination node was already in the tunnel, the first hop information
2251 * will be replaced with the new path.
2253 * @param t Tunnel we want to add a new peer to
2254 * @param p Path to add
2255 * @param own_pos Position of local node in path.
2259 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
2260 unsigned int own_pos)
2262 struct GNUNET_PeerIdentity id;
2264 GNUNET_assert (0 != own_pos);
2265 tree_add_path (t->tree, p, NULL, NULL);
2266 if (own_pos < p->length - 1)
2268 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
2269 tree_update_first_hops (t->tree, myid, &id);
2275 * Notifies a tunnel that a connection has broken that affects at least
2276 * some of its peers. Sends a notification towards the root of the tree.
2277 * In case the peer is the owner of the tree, notifies the client that owns
2278 * the tunnel and tries to reconnect.
2280 * @param t Tunnel affected.
2281 * @param p1 Peer that got disconnected from p2.
2282 * @param p2 Peer that got disconnected from p1.
2284 * @return Short ID of the peer disconnected (either p1 or p2).
2285 * 0 if the tunnel remained unaffected.
2287 static GNUNET_PEER_Id
2288 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2294 tree_notify_connection_broken (t->tree, p1, p2, ¬ify_peer_disconnected,
2296 if (myid != p1 && myid != p2)
2302 if (tree_get_predecessor (t->tree) != 0)
2304 /* We are the peer still connected, notify owner of the disconnection. */
2305 struct GNUNET_MESH_PathBroken msg;
2306 struct GNUNET_PeerIdentity neighbor;
2308 msg.header.size = htons (sizeof (msg));
2309 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2310 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2311 msg.tid = htonl (t->id.tid);
2312 msg.peer1 = my_full_id;
2313 GNUNET_PEER_resolve (pid, &msg.peer2);
2314 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2315 send_message (&msg.header, &neighbor);
2323 * Send a multicast packet to a neighbor.
2325 * @param cls Closure (Info about the multicast packet)
2326 * @param neighbor_id Short ID of the neighbor to send the packet to.
2329 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
2331 struct MeshData *mdata = cls;
2332 struct MeshTransmissionDescriptor *info;
2333 struct GNUNET_PeerIdentity neighbor;
2336 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2338 info->mesh_data = mdata;
2339 (*(mdata->reference_counter)) ++;
2340 info->destination = neighbor_id;
2341 GNUNET_PEER_resolve (neighbor_id, &neighbor);
2342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending to %s...\n",
2343 GNUNET_i2s (&neighbor));
2344 info->peer = peer_info_get (&neighbor);
2345 GNUNET_assert (NULL != info->peer);
2346 i = peer_info_transmit_slot (info->peer);
2347 info->handler_n = i;
2348 info->peer->infos[i] = info;
2349 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
2350 info->peer->core_transmit[i] =
2351 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2352 GNUNET_TIME_UNIT_FOREVER_REL,
2353 &neighbor, info->mesh_data->data_len,
2354 &send_core_data_multicast, info);
2358 * Send a message in a tunnel in multicast, sending a copy to each child node
2359 * down the local one in the tunnel tree.
2361 * @param t Tunnel in which to send the data.
2362 * @param msg Message to be sent.
2363 * @param internal Has the service generated this message?
2366 tunnel_send_multicast (struct MeshTunnel *t,
2367 const struct GNUNET_MessageHeader *msg,
2370 struct MeshData *mdata;
2372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2373 "MESH: sending a multicast packet...\n");
2374 mdata = GNUNET_malloc (sizeof (struct MeshData));
2375 mdata->data_len = ntohs (msg->size);
2376 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2378 mdata->data = GNUNET_malloc (mdata->data_len);
2379 memcpy (mdata->data, msg, mdata->data_len);
2380 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2382 struct GNUNET_MESH_Multicast *mcast;
2384 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
2385 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
2386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: data packet, ttl: %u\n",
2387 ntohl (mcast->ttl));
2391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: not a data packet, no ttl\n");
2393 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
2394 && GNUNET_NO == internal)
2396 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
2398 GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT, &client_allow_send,
2400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: timeout task %u\n",
2404 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
2405 if (*(mdata->reference_counter) == 0)
2407 GNUNET_free (mdata->data);
2408 GNUNET_free (mdata->reference_counter);
2409 if (NULL != mdata->task)
2411 GNUNET_SCHEDULER_cancel(*(mdata->task));
2412 GNUNET_free (mdata->task);
2413 GNUNET_SERVER_receive_done(t->owner->handle, GNUNET_OK);
2415 // FIXME change order?
2416 GNUNET_free (mdata);
2418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2419 "MESH: sending a multicast packet done\n");
2425 * Send a message to all peers in this tunnel that the tunnel is no longer
2428 * @param t The tunnel whose peers to notify.
2431 tunnel_send_destroy (struct MeshTunnel *t)
2433 struct GNUNET_MESH_TunnelDestroy msg;
2435 msg.header.size = htons (sizeof (msg));
2436 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2437 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2438 msg.tid = htonl (t->id.tid);
2439 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
2445 * Destroy the tunnel and free any allocated resources linked to it.
2447 * @param t the tunnel to destroy
2449 * @return GNUNET_OK on success
2452 tunnel_destroy (struct MeshTunnel *t)
2454 struct MeshClient *c;
2455 struct MeshQueue *q;
2456 struct MeshQueue *qn;
2457 GNUNET_HashCode hash;
2468 struct GNUNET_PeerIdentity id;
2470 GNUNET_PEER_resolve (t->id.oid, &id);
2471 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: destroying tunnel %s [%x]\n",
2472 GNUNET_i2s (&id), t->id.tid);
2474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
2478 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2479 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2484 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2487 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2491 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2492 for (i = 0; i < t->nclients; i++)
2496 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2501 for (i = 0; i < t->nignore; i++)
2505 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
2510 if (t->nclients > 0)
2513 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2517 GNUNET_free (t->clients);
2519 if (NULL != t->peers)
2521 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
2523 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
2528 if (NULL != q->data)
2529 GNUNET_free (q->data);
2533 /* TODO cancel core transmit ready in case it was active */
2535 tree_destroy (t->tree);
2536 if (NULL != t->dht_get_type)
2537 GNUNET_DHT_get_stop (t->dht_get_type);
2538 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2539 GNUNET_SCHEDULER_cancel (t->timeout_task);
2540 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2541 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
2548 * Removes an explicit path from a tunnel, freeing all intermediate nodes
2549 * that are no longer needed, as well as nodes of no longer reachable peers.
2550 * The tunnel itself is also destoyed if results in a remote empty tunnel.
2552 * @param t Tunnel from which to remove the path.
2553 * @param peer Short id of the peer which should be removed.
2556 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
2558 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
2564 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2565 * client when the client disconnects. If the client is not the owner, the
2566 * owner will get notified if no more clients are in the tunnel and the client
2567 * get removed from the tunnel's list.
2569 * @param cls closure (client that is disconnecting)
2570 * @param key the hash of the local tunnel id (used to access the hashmap)
2571 * @param value the value stored at the key (tunnel to destroy)
2573 * @return GNUNET_OK on success
2576 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
2578 struct MeshTunnel *t = value;
2579 struct MeshClient *c = cls;
2582 send_client_tunnel_disconnect(t, c);
2585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2586 "Client %u is destination, keeping the tunnel alive.\n", c->id);
2587 tunnel_delete_client(t, c);
2588 client_delete_tunnel(c, t);
2591 tunnel_send_destroy(t);
2592 r = tunnel_destroy (t);
2598 * Timeout function, destroys tunnel if called
2600 * @param cls Closure (tunnel to destroy).
2601 * @param tc TaskContext
2604 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2606 struct MeshTunnel *t = cls;
2608 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2610 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2615 * Resets the tunnel timeout. Starts it if no timeout was running.
2617 * @param t Tunnel whose timeout to reset.
2620 tunnel_reset_timeout (struct MeshTunnel *t)
2622 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2623 GNUNET_SCHEDULER_cancel (t->timeout_task);
2625 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2626 (REFRESH_PATH_TIME, 4), &tunnel_timeout, t);
2630 /******************************************************************************/
2631 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2632 /******************************************************************************/
2635 * Function called to notify a client about the socket
2636 * being ready to queue more data. "buf" will be
2637 * NULL and "size" zero if the socket was closed for
2638 * writing in the meantime.
2640 * @param cls closure
2641 * @param size number of bytes available in buf
2642 * @param buf where the callee should write the message
2643 * @return number of bytes written to buf
2646 send_core_create_path (void *cls, size_t size, void *buf)
2648 struct MeshPathInfo *info = cls;
2649 struct GNUNET_MESH_ManipulatePath *msg;
2650 struct GNUNET_PeerIdentity *peer_ptr;
2651 struct MeshPeerInfo *peer = info->peer;
2652 struct MeshTunnel *t = info->t;
2653 struct MeshPeerPath *p = info->path;
2657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATE PATH sending...\n");
2659 sizeof (struct GNUNET_MESH_ManipulatePath) +
2660 p->length * sizeof (struct GNUNET_PeerIdentity);
2662 if (size < size_needed || NULL == buf)
2664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n", size,
2668 info->peer->core_transmit[info->pos] =
2669 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2670 GNUNET_TIME_UNIT_FOREVER_REL,
2671 tree_get_first_hop (t->tree,
2673 size_needed, &send_core_create_path,
2677 info->peer->core_transmit[info->pos] = NULL;
2680 struct GNUNET_PeerIdentity id;
2682 GNUNET_PEER_resolve (peer->id, &id);
2683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2684 "MESH: setting core_transmit %s [%u] to NULL\n",
2685 GNUNET_i2s (&id), info->pos);
2688 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2689 msg->header.size = htons (size_needed);
2690 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2691 msg->tid = ntohl (t->id.tid);
2693 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2694 for (i = 0; i < p->length; i++)
2696 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2703 "MESH: CREATE PATH (%u bytes long) sent!\n", size_needed);
2709 * Function called to notify a client about the socket
2710 * being ready to queue more data. "buf" will be
2711 * NULL and "size" zero if the socket was closed for
2712 * writing in the meantime.
2714 * @param cls closure (data itself)
2715 * @param size number of bytes available in buf
2716 * @param buf where the callee should write the message
2718 * @return number of bytes written to buf
2721 send_core_data_multicast (void *cls, size_t size, void *buf)
2723 struct MeshTransmissionDescriptor *info = cls;
2726 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2727 GNUNET_assert (NULL != info);
2728 GNUNET_assert (NULL != info->peer);
2729 total_size = info->mesh_data->data_len;
2730 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2732 if (total_size > size)
2735 struct GNUNET_PeerIdentity id;
2737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2738 "MESH: Multicast: retransmitting... (%u/%u)\n", size,
2740 GNUNET_PEER_resolve (info->peer->id, &id);
2741 info->peer->core_transmit[info->handler_n] =
2742 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2743 GNUNET_TIME_UNIT_FOREVER_REL, &id,
2745 &send_core_data_multicast, info);
2748 info->peer->core_transmit[info->handler_n] = NULL;
2749 info->peer->infos[info->handler_n] = NULL;
2750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2751 memcpy (buf, info->mesh_data->data, total_size);
2754 struct GNUNET_MESH_Multicast *mc;
2755 struct GNUNET_MessageHeader *mh;
2758 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2760 mc = (struct GNUNET_MESH_Multicast *) mh;
2761 mh = (struct GNUNET_MessageHeader *) &mc[1];
2762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2763 "MESH: multicast, payload type %u\n", ntohs (mh->type));
2764 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2765 "MESH: multicast, payload size %u\n", ntohs (mh->size));
2769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type %u\n",
2774 data_descriptor_decrement_multicast (info->mesh_data);
2775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2783 * Function called to notify a client about the socket
2784 * being ready to queue more data. "buf" will be
2785 * NULL and "size" zero if the socket was closed for
2786 * writing in the meantime.
2788 * @param cls closure (MeshTransmissionDescriptor)
2789 * @param size number of bytes available in buf
2790 * @param buf where the callee should write the message
2791 * @return number of bytes written to buf
2794 send_core_path_ack (void *cls, size_t size, void *buf)
2796 struct MeshTransmissionDescriptor *info = cls;
2797 struct GNUNET_MESH_PathACK *msg = buf;
2799 GNUNET_assert (NULL != info);
2802 info->peer->core_transmit[info->handler_n] = NULL;
2804 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2809 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2810 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2811 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2812 msg->tid = htonl (info->origin->tid);
2813 msg->peer_id = my_full_id;
2815 /* TODO add signature */
2817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2818 return sizeof (struct GNUNET_MESH_PathACK);
2822 /******************************************************************************/
2823 /******************** MESH NETWORK HANDLERS **************************/
2824 /******************************************************************************/
2828 * Core handler for path creation
2830 * @param cls closure
2831 * @param message message
2832 * @param peer peer identity this notification is about
2833 * @param atsi performance data
2834 * @param atsi_count number of records in 'atsi'
2836 * @return GNUNET_OK to keep the connection open,
2837 * GNUNET_SYSERR to close it (signal serious error)
2840 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2841 const struct GNUNET_MessageHeader *message,
2842 const struct GNUNET_ATS_Information *atsi,
2843 unsigned int atsi_count)
2845 unsigned int own_pos;
2848 MESH_TunnelNumber tid;
2849 struct GNUNET_MESH_ManipulatePath *msg;
2850 struct GNUNET_PeerIdentity *pi;
2851 GNUNET_HashCode hash;
2852 struct MeshPeerPath *path;
2853 struct MeshPeerInfo *dest_peer_info;
2854 struct MeshPeerInfo *orig_peer_info;
2855 struct MeshTunnel *t;
2857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2858 "MESH: Received a path create msg [%s]\n",
2859 GNUNET_i2s (&my_full_id));
2860 size = ntohs (message->size);
2861 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2863 GNUNET_break_op (0);
2867 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2868 if (size % sizeof (struct GNUNET_PeerIdentity))
2870 GNUNET_break_op (0);
2873 size /= sizeof (struct GNUNET_PeerIdentity);
2876 GNUNET_break_op (0);
2879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: path has %u hops.\n", size);
2880 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2882 tid = ntohl (msg->tid);
2883 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2885 "MESH: path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
2886 t = tunnel_get (pi, tid);
2889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2890 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2891 t->id.oid = GNUNET_PEER_intern (pi);
2893 while (NULL != tunnel_get_incoming (next_local_tid))
2894 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2895 t->local_tid_dest = next_local_tid++;
2896 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2897 t->tree = tree_new (t->id.oid);
2899 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2901 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2902 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2908 tunnel_reset_timeout (t);
2909 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2911 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2912 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2920 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2921 if (NULL == dest_peer_info)
2923 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2924 "MESH: Creating PeerInfo for destination.\n");
2925 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2926 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2927 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2929 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2931 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2932 if (NULL == orig_peer_info)
2934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2935 "MESH: Creating PeerInfo for origin.\n");
2936 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2937 orig_peer_info->id = GNUNET_PEER_intern (pi);
2938 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2939 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2942 path = path_new (size);
2944 for (i = 0; i < size; i++)
2946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... adding %s\n",
2947 GNUNET_i2s (&pi[i]));
2948 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2949 if (path->peers[i] == myid)
2952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Own position: %u\n", own_pos);
2955 /* cannot be self, must be 'not found' */
2956 /* create path: self not found in path through self */
2957 GNUNET_break_op (0);
2958 path_destroy (path);
2959 /* FIXME error. destroy tunnel? leave for timeout? */
2962 path_add_to_peers (path, GNUNET_NO);
2963 tunnel_add_path (t, path, own_pos);
2964 if (own_pos == size - 1)
2966 /* It is for us! Send ack. */
2967 struct MeshTransmissionDescriptor *info;
2970 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2971 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
2972 if (NULL == t->peers)
2974 /* New tunnel! Notify clients on data. */
2975 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
2977 GNUNET_break (GNUNET_OK ==
2978 GNUNET_CONTAINER_multihashmap_put (t->peers,
2979 &my_full_id.hashPubKey,
2982 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
2983 /* FIXME use send_message */
2984 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2985 info->origin = &t->id;
2986 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2987 GNUNET_assert (NULL != info->peer);
2988 j = peer_info_transmit_slot (info->peer);
2989 info->handler_n = j;
2990 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2991 info->peer->infos[j] = info;
2992 info->peer->core_transmit[j] =
2993 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2994 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2995 sizeof (struct GNUNET_MESH_PathACK),
2996 &send_core_path_ack, info);
3000 struct MeshPeerPath *path2;
3002 /* It's for somebody else! Retransmit. */
3003 path2 = path_duplicate (path);
3004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Retransmitting.\n");
3005 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3006 path2 = path_duplicate (path);
3007 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
3008 send_create_path (dest_peer_info, path, t);
3015 * Core handler for path destruction
3017 * @param cls closure
3018 * @param message message
3019 * @param peer peer identity this notification is about
3020 * @param atsi performance data
3021 * @param atsi_count number of records in 'atsi'
3023 * @return GNUNET_OK to keep the connection open,
3024 * GNUNET_SYSERR to close it (signal serious error)
3027 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3028 const struct GNUNET_MessageHeader *message,
3029 const struct GNUNET_ATS_Information *atsi,
3030 unsigned int atsi_count)
3032 struct GNUNET_MESH_ManipulatePath *msg;
3033 struct GNUNET_PeerIdentity *pi;
3034 struct MeshPeerPath *path;
3035 struct MeshTunnel *t;
3036 unsigned int own_pos;
3040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3041 "MESH: Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
3042 size = ntohs (message->size);
3043 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
3045 GNUNET_break_op (0);
3049 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
3050 if (size % sizeof (struct GNUNET_PeerIdentity))
3052 GNUNET_break_op (0);
3055 size /= sizeof (struct GNUNET_PeerIdentity);
3058 GNUNET_break_op (0);
3061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: path has %u hops.\n", size);
3063 msg = (struct GNUNET_MESH_ManipulatePath *) message;
3064 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3066 "MESH: path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
3068 t = tunnel_get (pi, ntohl (msg->tid));
3071 /* TODO notify back: we don't know this tunnel */
3072 GNUNET_break_op (0);
3075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
3076 path = path_new (size);
3078 for (i = 0; i < size; i++)
3080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... adding %s\n",
3081 GNUNET_i2s (&pi[i]));
3082 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3083 if (path->peers[i] == myid)
3086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Own position: %u\n", own_pos);
3087 if (own_pos < path->length - 1)
3088 send_message (message, &pi[own_pos + 1]);
3090 send_client_tunnel_disconnect(t, NULL);
3092 tunnel_delete_peer (t, path->peers[path->length - 1]);
3093 path_destroy (path);
3099 * Core handler for notifications of broken paths
3101 * @param cls closure
3102 * @param message message
3103 * @param peer peer identity this notification is about
3104 * @param atsi performance data
3105 * @param atsi_count number of records in 'atsi'
3107 * @return GNUNET_OK to keep the connection open,
3108 * GNUNET_SYSERR to close it (signal serious error)
3111 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3112 const struct GNUNET_MessageHeader *message,
3113 const struct GNUNET_ATS_Information *atsi,
3114 unsigned int atsi_count)
3116 struct GNUNET_MESH_PathBroken *msg;
3117 struct MeshTunnel *t;
3119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3120 "MESH: Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3121 msg = (struct GNUNET_MESH_PathBroken *) message;
3122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: regarding %s\n",
3123 GNUNET_i2s (&msg->peer1));
3124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: regarding %s\n",
3125 GNUNET_i2s (&msg->peer2));
3126 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3129 GNUNET_break_op (0);
3132 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3133 GNUNET_PEER_search (&msg->peer2));
3140 * Core handler for tunnel destruction
3142 * @param cls closure
3143 * @param message message
3144 * @param peer peer identity this notification is about
3145 * @param atsi performance data
3146 * @param atsi_count number of records in 'atsi'
3148 * @return GNUNET_OK to keep the connection open,
3149 * GNUNET_SYSERR to close it (signal serious error)
3152 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3153 const struct GNUNET_MessageHeader *message,
3154 const struct GNUNET_ATS_Information *atsi,
3155 unsigned int atsi_count)
3157 struct GNUNET_MESH_TunnelDestroy *msg;
3158 struct MeshTunnel *t;
3160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3161 "MESH: Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
3162 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: for tunnel %s [%u]\n",
3164 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3165 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3168 /* Probably already got the message from another path,
3169 * destroyed the tunnel and retransmitted to children.
3174 if (t->id.oid == myid)
3176 GNUNET_break_op (0);
3179 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3181 /* Tunnel was incoming, notify clients */
3182 send_clients_tunnel_destroy (t);
3184 tunnel_send_destroy (t);
3191 * Core handler for mesh network traffic going from the origin to a peer
3193 * @param cls closure
3194 * @param peer peer identity this notification is about
3195 * @param message message
3196 * @param atsi performance data
3197 * @param atsi_count number of records in 'atsi'
3198 * @return GNUNET_OK to keep the connection open,
3199 * GNUNET_SYSERR to close it (signal serious error)
3202 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3203 const struct GNUNET_MessageHeader *message,
3204 const struct GNUNET_ATS_Information *atsi,
3205 unsigned int atsi_count)
3207 struct GNUNET_MESH_Unicast *msg;
3208 struct MeshTunnel *t;
3212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got a unicast packet from %s\n",
3214 size = ntohs (message->size);
3216 sizeof (struct GNUNET_MESH_Unicast) +
3217 sizeof (struct GNUNET_MessageHeader))
3222 msg = (struct GNUNET_MESH_Unicast *) message;
3223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: of type %u\n",
3224 ntohs (msg[1].header.type));
3225 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3228 /* TODO notify back: we don't know this tunnel */
3229 GNUNET_break_op (0);
3232 tunnel_reset_timeout (t);
3233 pid = GNUNET_PEER_search (&msg->destination);
3236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3237 "MESH: it's for us! sending to clients...\n");
3238 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
3241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3242 "MESH: not for us, retransmitting...\n");
3243 send_message (message, tree_get_first_hop (t->tree, pid));
3249 * Core handler for mesh network traffic going from the origin to all peers
3251 * @param cls closure
3252 * @param message message
3253 * @param peer peer identity this notification is about
3254 * @param atsi performance data
3255 * @param atsi_count number of records in 'atsi'
3256 * @return GNUNET_OK to keep the connection open,
3257 * GNUNET_SYSERR to close it (signal serious error)
3259 * TODO: Check who we got this from, to validate route.
3262 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3263 const struct GNUNET_MessageHeader *message,
3264 const struct GNUNET_ATS_Information *atsi,
3265 unsigned int atsi_count)
3267 struct GNUNET_MESH_Multicast *msg;
3268 struct MeshTunnel *t;
3271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got a multicast packet from %s\n",
3273 size = ntohs (message->size);
3274 if (sizeof (struct GNUNET_MESH_Multicast) +
3275 sizeof (struct GNUNET_MessageHeader) > size)
3277 GNUNET_break_op (0);
3280 msg = (struct GNUNET_MESH_Multicast *) message;
3281 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3285 /* TODO notify that we dont know that tunnel */
3286 GNUNET_break_op (0);
3289 if (t->mid == ntohl (msg->mid))
3291 /* FIXME: already seen this packet, log dropping */
3292 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3293 "MESH: Already seen mid %u, DROPPING!\n", t->mid);
3298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3299 "MESH: mid %u not seen yet, forwarding\n", ntohl (msg->mid));
3301 t->mid = ntohl (msg->mid);
3302 tunnel_reset_timeout (t);
3304 /* Transmit to locally interested clients */
3305 if (NULL != t->peers &&
3306 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
3308 send_subscribed_clients (message, &msg[1].header);
3310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ttl: %u\n", ntohl (msg->ttl));
3311 if (ntohl (msg->ttl) == 0)
3313 /* FIXME: ttl is 0, log dropping */
3314 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "MESH: TTL is 0, DROPPING!\n");
3317 tunnel_send_multicast (t, message, GNUNET_NO);
3323 * Core handler for mesh network traffic toward the owner of a tunnel
3325 * @param cls closure
3326 * @param message message
3327 * @param peer peer identity this notification is about
3328 * @param atsi performance data
3329 * @param atsi_count number of records in 'atsi'
3331 * @return GNUNET_OK to keep the connection open,
3332 * GNUNET_SYSERR to close it (signal serious error)
3335 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3336 const struct GNUNET_MessageHeader *message,
3337 const struct GNUNET_ATS_Information *atsi,
3338 unsigned int atsi_count)
3340 struct GNUNET_MESH_ToOrigin *msg;
3341 struct GNUNET_PeerIdentity id;
3342 struct MeshPeerInfo *peer_info;
3343 struct MeshTunnel *t;
3346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got a ToOrigin packet from %s\n",
3348 size = ntohs (message->size);
3349 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3350 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3352 GNUNET_break_op (0);
3355 msg = (struct GNUNET_MESH_ToOrigin *) message;
3356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: of type %u\n",
3357 ntohs (msg[1].header.type));
3358 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3362 /* TODO notify that we dont know this tunnel (whom)? */
3363 GNUNET_break_op (0);
3367 if (t->id.oid == myid)
3370 struct GNUNET_MESH_ToOrigin *copy;
3372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3373 "MESH: it's for us! sending to clients...\n");
3374 if (NULL == t->owner)
3376 /* got data packet for ownerless tunnel */
3377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: no clients!\n");
3378 GNUNET_break_op (0);
3381 /* TODO signature verification */
3382 memcpy (cbuf, message, size);
3383 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3384 copy->tid = htonl (t->local_tid);
3385 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3386 ©->header, GNUNET_YES);
3389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3390 "MESH: not for us, retransmitting...\n");
3392 peer_info = peer_info_get (&msg->oid);
3393 if (NULL == peer_info)
3395 /* unknown origin of tunnel */
3399 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3400 send_message (message, &id);
3407 * Core handler for path ACKs
3409 * @param cls closure
3410 * @param message message
3411 * @param peer peer identity this notification is about
3412 * @param atsi performance data
3413 * @param atsi_count number of records in 'atsi'
3415 * @return GNUNET_OK to keep the connection open,
3416 * GNUNET_SYSERR to close it (signal serious error)
3419 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3420 const struct GNUNET_MessageHeader *message,
3421 const struct GNUNET_ATS_Information *atsi,
3422 unsigned int atsi_count)
3424 struct GNUNET_MESH_PathACK *msg;
3425 struct GNUNET_PeerIdentity id;
3426 struct MeshPeerInfo *peer_info;
3427 struct MeshPeerPath *p;
3428 struct MeshTunnel *t;
3430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Received a path ACK msg [%s]\n",
3431 GNUNET_i2s (&my_full_id));
3432 msg = (struct GNUNET_MESH_PathACK *) message;
3433 t = tunnel_get (&msg->oid, msg->tid);
3436 /* TODO notify that we don't know the tunnel */
3440 peer_info = peer_info_get (&msg->peer_id);
3442 /* Add paths to peers? */
3443 p = tree_get_path_to_peer (t->tree, peer_info->id);
3446 path_add_to_peers (p, GNUNET_YES);
3454 /* Message for us? */
3455 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
3458 if (NULL == t->owner)
3460 GNUNET_break_op (0);
3463 if (NULL != t->dht_get_type)
3465 GNUNET_DHT_get_stop (t->dht_get_type);
3466 t->dht_get_type = NULL;
3468 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
3470 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
3471 send_client_peer_connected (t, peer_info->id);
3476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3477 "MESH: not for us, retransmitting...\n");
3478 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3479 peer_info = peer_info_get (&msg->oid);
3480 if (NULL == peer_info)
3482 /* If we know the tunnel, we should DEFINITELY know the peer */
3486 send_message (message, &id);
3492 * Functions to handle messages from core
3494 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3495 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3496 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3497 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3498 sizeof (struct GNUNET_MESH_PathBroken)},
3499 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
3500 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3501 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3502 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3503 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3504 sizeof (struct GNUNET_MESH_PathACK)},
3510 /******************************************************************************/
3511 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3512 /******************************************************************************/
3515 * deregister_app: iterator for removing each application registered by a client
3517 * @param cls closure
3518 * @param key the hash of the application id (used to access the hashmap)
3519 * @param value the value stored at the key (client)
3521 * @return GNUNET_OK on success
3524 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
3526 GNUNET_break (GNUNET_YES ==
3527 GNUNET_CONTAINER_multihashmap_remove (applications, key,
3534 * notify_client_connection_failure: notify a client that the connection to the
3535 * requested remote peer is not possible (for instance, no route found)
3536 * Function called when the socket is ready to queue more data. "buf" will be
3537 * NULL and "size" zero if the socket was closed for writing in the meantime.
3539 * @param cls closure
3540 * @param size number of bytes available in buf
3541 * @param buf where the callee should write the message
3542 * @return number of bytes written to buf
3545 notify_client_connection_failure (void *cls, size_t size, void *buf)
3548 struct MeshPeerInfo *peer_info;
3549 struct GNUNET_MESH_PeerControl *msg;
3550 struct GNUNET_PeerIdentity id;
3552 if (0 == size && NULL == buf)
3554 // TODO retry? cancel?
3558 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3559 peer_info = (struct MeshPeerInfo *) cls;
3560 msg = (struct GNUNET_MESH_PeerControl *) buf;
3561 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3562 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3563 // msg->tunnel_id = htonl(peer_info->t->tid);
3564 GNUNET_PEER_resolve (peer_info->id, &id);
3565 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3573 * Send keepalive packets for a peer
3575 * @param cls Closure (tunnel for which to send the keepalive).
3576 * @param tc Notification context.
3578 * TODO: implement explicit multicast keepalive?
3581 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3583 struct MeshTunnel *t = cls;
3584 struct GNUNET_MessageHeader *payload;
3585 struct GNUNET_MESH_Multicast *msg;
3587 sizeof (struct GNUNET_MESH_Multicast) +
3588 sizeof (struct GNUNET_MessageHeader);
3591 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
3595 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
3597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3598 "MESH: sending keepalive for tunnel %d\n", t->id.tid);
3600 msg = (struct GNUNET_MESH_Multicast *) cbuf;
3601 msg->header.size = htons (size);
3602 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3603 msg->oid = my_full_id;
3604 msg->tid = htonl (t->id.tid);
3605 msg->ttl = htonl (DEFAULT_TTL);
3606 msg->mid = htonl (t->mid + 1);
3608 payload = (struct GNUNET_MessageHeader *) &msg[1];
3609 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
3610 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3611 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
3613 t->path_refresh_task =
3614 GNUNET_SCHEDULER_add_delayed (REFRESH_PATH_TIME, &path_refresh, t);
3620 * Function to process paths received for a new peer addition. The recorded
3621 * paths form the initial tunnel, which can be optimized later.
3622 * Called on each result obtained for the DHT search.
3624 * @param cls closure
3625 * @param exp when will this value expire
3626 * @param key key of the result
3627 * @param get_path path of the get request
3628 * @param get_path_length lenght of get_path
3629 * @param put_path path of the put request
3630 * @param put_path_length length of the put_path
3631 * @param type type of the result
3632 * @param size number of bytes in data
3633 * @param data pointer to the result data
3635 * TODO: re-issue the request after certain time? cancel after X results?
3638 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3639 const GNUNET_HashCode * key,
3640 const struct GNUNET_PeerIdentity *get_path,
3641 unsigned int get_path_length,
3642 const struct GNUNET_PeerIdentity *put_path,
3643 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3644 size_t size, const void *data)
3646 struct MeshPathInfo *path_info = cls;
3647 struct MeshPeerPath *p;
3648 struct GNUNET_PeerIdentity pi;
3651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got results from DHT!\n");
3652 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n", GNUNET_i2s (&pi));
3655 p = path_build_from_dht (get_path, get_path_length, put_path,
3657 path_add_to_peers (p, GNUNET_NO);
3659 for (i = 0; i < path_info->peer->ntunnels; i++)
3661 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3662 peer_info_connect (path_info->peer, path_info->t);
3670 * Function to process paths received for a new peer addition. The recorded
3671 * paths form the initial tunnel, which can be optimized later.
3672 * Called on each result obtained for the DHT search.
3674 * @param cls closure
3675 * @param exp when will this value expire
3676 * @param key key of the result
3677 * @param get_path path of the get request
3678 * @param get_path_length lenght of get_path
3679 * @param put_path path of the put request
3680 * @param put_path_length length of the put_path
3681 * @param type type of the result
3682 * @param size number of bytes in data
3683 * @param data pointer to the result data
3686 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3687 const GNUNET_HashCode * key,
3688 const struct GNUNET_PeerIdentity *get_path,
3689 unsigned int get_path_length,
3690 const struct GNUNET_PeerIdentity *put_path,
3691 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3692 size_t size, const void *data)
3694 const struct GNUNET_PeerIdentity *pi = data;
3695 struct MeshTunnel *t = cls;
3696 struct MeshPeerInfo *peer_info;
3697 struct MeshPeerPath *p;
3699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got type DHT result!\n");
3700 if (size != sizeof (struct GNUNET_PeerIdentity))
3702 GNUNET_break_op (0);
3705 GNUNET_assert (NULL != t->owner);
3706 peer_info = peer_info_get (pi);
3707 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
3709 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
3711 p = path_build_from_dht (get_path, get_path_length, put_path,
3713 path_add_to_peers (p, GNUNET_NO);
3715 tunnel_add_peer (t, peer_info);
3716 peer_info_connect (peer_info, t);
3720 /******************************************************************************/
3721 /********************* MESH LOCAL HANDLES **************************/
3722 /******************************************************************************/
3726 * Handler for client disconnection
3728 * @param cls closure
3729 * @param client identification of the client; NULL
3730 * for the last call when the server is destroyed
3733 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3735 struct MeshClient *c;
3736 struct MeshClient *next;
3738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3741 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3747 if (c->handle != client)
3749 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found (%u)\n",
3755 GNUNET_SERVER_client_drop (c->handle);
3756 c->shutting_down = GNUNET_YES;
3757 GNUNET_assert (NULL != c->own_tunnels);
3758 GNUNET_assert (NULL != c->incoming_tunnels);
3759 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3760 &tunnel_destroy_iterator, c);
3761 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3762 &tunnel_destroy_iterator, c);
3763 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
3764 &tunnel_destroy_iterator, c);
3765 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3766 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3767 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
3769 /* deregister clients applications */
3770 if (NULL != c->apps)
3772 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3773 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3775 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3776 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3778 GNUNET_SCHEDULER_cancel (announce_applications_task);
3779 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3781 if (NULL != c->types)
3782 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3784 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT FREE at %p\n", c);
3789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3795 * Handler for new clients
3797 * @param cls closure
3798 * @param client identification of the client
3799 * @param message the actual message, which includes messages the client wants
3802 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3803 const struct GNUNET_MessageHeader *message)
3805 struct GNUNET_MESH_ClientConnect *cc_msg;
3806 struct MeshClient *c;
3807 GNUNET_MESH_ApplicationType *a;
3814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3815 /* Check data sanity */
3816 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3817 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3818 ntypes = ntohs (cc_msg->types);
3819 napps = ntohs (cc_msg->applications);
3821 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3824 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3828 /* Create new client structure */
3829 c = GNUNET_malloc (sizeof (struct MeshClient));
3830 c->id = next_client_id++;
3831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CLIENT NEW %u\n", c->id);
3833 GNUNET_SERVER_client_keep (client);
3834 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3837 GNUNET_MESH_ApplicationType at;
3840 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3841 for (i = 0; i < napps; i++)
3844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3845 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3846 /* store in clients hashmap */
3847 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3848 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3849 /* store in global hashmap, for announcements */
3850 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3851 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3853 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3854 announce_applications_task =
3855 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3863 t = (uint16_t *) & a[napps];
3864 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3865 for (i = 0; i < ntypes; i++)
3868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: msg type: %u\n", u16);
3869 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3871 /* store in clients hashmap */
3872 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3873 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3874 /* store in global hashmap */
3875 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3876 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3880 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3882 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3883 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3884 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3885 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3886 GNUNET_SERVER_notification_context_add (nc, client);
3888 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3894 * Handler for requests of new tunnels
3896 * @param cls closure
3897 * @param client identification of the client
3898 * @param message the actual message
3901 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3902 const struct GNUNET_MessageHeader *message)
3904 struct GNUNET_MESH_TunnelMessage *t_msg;
3905 struct MeshTunnel *t;
3906 struct MeshClient *c;
3907 GNUNET_HashCode hash;
3909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3911 /* Sanity check for client registration */
3912 if (NULL == (c = client_get (client)))
3915 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3920 /* Message sanity check */
3921 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3924 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3928 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3929 /* Sanity check for tunnel numbering */
3930 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3933 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3936 /* Sanity check for duplicate tunnel IDs */
3937 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3940 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3944 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3945 while (NULL != tunnel_get_by_pi (myid, next_tid))
3946 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3947 t->id.tid = next_tid++;
3948 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3950 t->local_tid = ntohl (t_msg->tunnel_id);
3951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL %s [%x] (%x)\n",
3952 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
3954 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3956 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3958 GNUNET_CONTAINER_multihashmap_put (c->own_tunnels, &hash, t,
3959 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3962 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3966 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3968 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3969 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3972 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3975 t->tree = tree_new (myid);
3977 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3983 * Handler for requests of deleting tunnels
3985 * @param cls closure
3986 * @param client identification of the client
3987 * @param message the actual message
3990 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3991 const struct GNUNET_MessageHeader *message)
3993 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3994 struct MeshClient *c;
3995 struct MeshTunnel *t;
3996 MESH_TunnelNumber tid;
3998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3999 "MESH: Got a DESTROY TUNNEL from client!\n");
4001 /* Sanity check for client registration */
4002 if (NULL == (c = client_get (client)))
4005 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4008 /* Message sanity check */
4009 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4012 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
4016 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4018 /* Retrieve tunnel */
4019 tid = ntohl (tunnel_msg->tunnel_id);
4020 t = tunnel_get_by_local_id(c, tid);
4024 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "MESH: tunnel %X not found\n", tid);
4025 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4028 send_client_tunnel_disconnect(t, c);
4031 client_ignore_tunnel (c, t);
4033 // TODO: when to destroy incoming tunnel?
4034 if (t->nclients == 0)
4036 GNUNET_assert (GNUNET_YES ==
4037 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
4039 GNUNET_assert (GNUNET_YES ==
4040 GNUNET_CONTAINER_multihashmap_remove (t->peers,
4041 &my_full_id.hashPubKey,
4045 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4048 client_delete_tunnel(c, t);
4050 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4052 tunnel_send_destroy (t);
4054 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4060 * Handler for connection requests to new peers
4062 * @param cls closure
4063 * @param client identification of the client
4064 * @param message the actual message (PeerControl)
4067 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
4068 const struct GNUNET_MessageHeader *message)
4070 struct GNUNET_MESH_PeerControl *peer_msg;
4071 struct MeshPeerInfo *peer_info;
4072 struct MeshClient *c;
4073 struct MeshTunnel *t;
4074 MESH_TunnelNumber tid;
4076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
4077 /* Sanity check for client registration */
4078 if (NULL == (c = client_get (client)))
4081 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4085 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
4086 /* Sanity check for message size */
4087 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
4090 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4094 /* Tunnel exists? */
4095 tid = ntohl (peer_msg->tunnel_id);
4096 t = tunnel_get_by_local_id (c, tid);
4100 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4104 /* Does client own tunnel? */
4105 if (t->owner->handle != client)
4108 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
4112 GNUNET_i2s (&peer_msg->peer));
4113 peer_info = peer_info_get (&peer_msg->peer);
4115 tunnel_add_peer (t, peer_info);
4116 peer_info_connect (peer_info, t);
4118 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4124 * Handler for disconnection requests of peers in a tunnel
4126 * @param cls closure
4127 * @param client identification of the client
4128 * @param message the actual message (PeerControl)
4131 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
4132 const struct GNUNET_MessageHeader *message)
4134 struct GNUNET_MESH_PeerControl *peer_msg;
4135 struct MeshPeerInfo *peer_info;
4136 struct MeshClient *c;
4137 struct MeshTunnel *t;
4138 MESH_TunnelNumber tid;
4140 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
4141 /* Sanity check for client registration */
4142 if (NULL == (c = client_get (client)))
4145 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4148 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
4149 /* Sanity check for message size */
4150 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
4153 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4157 /* Tunnel exists? */
4158 tid = ntohl (peer_msg->tunnel_id);
4159 t = tunnel_get_by_local_id (c, tid);
4163 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4166 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
4168 /* Does client own tunnel? */
4169 if (t->owner->handle != client)
4172 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: for peer %s\n",
4177 GNUNET_i2s (&peer_msg->peer));
4178 /* Is the peer in the tunnel? */
4180 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
4181 if (NULL == peer_info)
4184 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4188 /* Ok, delete peer from tunnel */
4189 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
4190 &peer_msg->peer.hashPubKey);
4192 send_destroy_path (t, peer_info->id);
4193 tunnel_delete_peer (t, peer_info->id);
4194 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4200 * Handler for connection requests to new peers by type
4202 * @param cls closure
4203 * @param client identification of the client
4204 * @param message the actual message (ConnectPeerByType)
4207 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
4208 const struct GNUNET_MessageHeader *message)
4210 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
4211 struct MeshClient *c;
4212 struct MeshTunnel *t;
4213 GNUNET_HashCode hash;
4214 MESH_TunnelNumber tid;
4216 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
4217 /* Sanity check for client registration */
4218 if (NULL == (c = client_get (client)))
4221 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4225 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
4226 /* Sanity check for message size */
4227 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
4228 ntohs (connect_msg->header.size))
4231 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4235 /* Tunnel exists? */
4236 tid = ntohl (connect_msg->tunnel_id);
4237 t = tunnel_get_by_local_id (c, tid);
4241 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4245 /* Does client own tunnel? */
4246 if (t->owner->handle != client)
4249 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4253 /* Do WE have the service? */
4254 t->type = ntohl (connect_msg->type);
4255 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
4256 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
4257 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
4260 /* Yes! Fast forward, add ourselves to the tunnel and send the
4261 * good news to the client, and alert the destination client of
4262 * an incoming tunnel.
4264 * FIXME send a path create to self, avoid code duplication
4266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
4267 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
4268 peer_info_get (&my_full_id),
4269 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
4272 send_client_peer_connected (t, myid);
4273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
4274 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4276 t->local_tid_dest = next_local_tid++;
4277 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4278 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
4279 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4283 /* Ok, lets find a peer offering the service */
4284 if (NULL != t->dht_get_type)
4286 GNUNET_DHT_get_stop (t->dht_get_type);
4288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
4289 GNUNET_h2s (&hash));
4291 GNUNET_DHT_get_start (dht_handle, GNUNET_TIME_UNIT_FOREVER_REL,
4292 GNUNET_BLOCK_TYPE_TEST, &hash, 10U,
4293 GNUNET_DHT_RO_RECORD_ROUTE |
4294 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, NULL, 0,
4295 &dht_get_type_handler, t);
4297 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4303 * Handler for client traffic directed to one peer
4305 * @param cls closure
4306 * @param client identification of the client
4307 * @param message the actual message
4310 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4311 const struct GNUNET_MessageHeader *message)
4313 struct MeshClient *c;
4314 struct MeshTunnel *t;
4315 struct MeshPeerInfo *pi;
4316 struct GNUNET_MESH_Unicast *data_msg;
4317 MESH_TunnelNumber tid;
4320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4321 "MESH: Got a unicast request from a client!\n");
4323 /* Sanity check for client registration */
4324 if (NULL == (c = client_get (client)))
4327 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4330 data_msg = (struct GNUNET_MESH_Unicast *) message;
4331 /* Sanity check for message size */
4332 size = ntohs (message->size);
4333 if (sizeof (struct GNUNET_MESH_Unicast) +
4334 sizeof (struct GNUNET_MessageHeader) > size)
4337 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4341 /* Tunnel exists? */
4342 tid = ntohl (data_msg->tid);
4343 t = tunnel_get_by_local_id (c, tid);
4347 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4351 /* Is it a local tunnel? Then, does client own the tunnel? */
4352 if (t->owner->handle != client)
4355 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4359 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
4360 &data_msg->destination.hashPubKey);
4361 /* Is the selected peer in the tunnel? */
4365 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4369 /* Ok, everything is correct, send the message
4370 * (pretend we got it from a mesh peer)
4373 char buf[ntohs (message->size)];
4374 struct GNUNET_MESH_Unicast *copy;
4376 /* Work around const limitation */
4377 copy = (struct GNUNET_MESH_Unicast *) buf;
4378 memcpy (buf, data_msg, size);
4379 copy->oid = my_full_id;
4380 copy->tid = htonl (t->id.tid);
4381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4382 "MESH: calling generic handler...\n");
4383 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
4385 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4391 * Handler for client traffic directed to the origin
4393 * @param cls closure
4394 * @param client identification of the client
4395 * @param message the actual message
4398 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4399 const struct GNUNET_MessageHeader *message)
4401 struct GNUNET_MESH_ToOrigin *data_msg;
4402 struct GNUNET_PeerIdentity id;
4403 struct MeshClient *c;
4404 struct MeshTunnel *t;
4405 MESH_TunnelNumber tid;
4408 /* Sanity check for client registration */
4409 if (NULL == (c = client_get (client)))
4412 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4415 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4416 /* Sanity check for message size */
4417 size = ntohs (message->size);
4418 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4419 sizeof (struct GNUNET_MessageHeader) > size)
4422 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4426 /* Tunnel exists? */
4427 tid = ntohl (data_msg->tid);
4428 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4429 "MESH: Got a ToOrigin request from a client! Tunnel %X\n", tid);
4430 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4433 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4436 t = tunnel_get_by_local_id (c, tid);
4440 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4444 /* It should be sent by someone who has this as incoming tunnel. */
4445 if (-1 == client_knows_tunnel (c, t))
4448 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4451 GNUNET_PEER_resolve (t->id.oid, &id);
4453 /* Ok, everything is correct, send the message
4454 * (pretend we got it from a mesh peer)
4457 char buf[ntohs (message->size)];
4458 struct GNUNET_MESH_ToOrigin *copy;
4460 /* Work around const limitation */
4461 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4462 memcpy (buf, data_msg, size);
4464 copy->tid = htonl (t->id.tid);
4465 copy->sender = my_full_id;
4466 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4467 "MESH: calling generic handler...\n");
4468 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
4470 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4476 * Handler for client traffic directed to all peers in a tunnel
4478 * @param cls closure
4479 * @param client identification of the client
4480 * @param message the actual message
4483 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
4484 const struct GNUNET_MessageHeader *message)
4486 struct MeshClient *c;
4487 struct MeshTunnel *t;
4488 struct GNUNET_MESH_Multicast *data_msg;
4489 MESH_TunnelNumber tid;
4491 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4492 "MESH: Got a multicast request from a client!\n");
4494 /* Sanity check for client registration */
4495 if (NULL == (c = client_get (client)))
4498 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4501 data_msg = (struct GNUNET_MESH_Multicast *) message;
4502 /* Sanity check for message size */
4503 if (sizeof (struct GNUNET_MESH_Multicast) +
4504 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
4507 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4511 /* Tunnel exists? */
4512 tid = ntohl (data_msg->tid);
4513 t = tunnel_get_by_local_id (c, tid);
4517 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4521 /* Does client own tunnel? */
4522 if (t->owner->handle != client)
4525 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4530 char buf[ntohs (message->size)];
4531 struct GNUNET_MESH_Multicast *copy;
4533 copy = (struct GNUNET_MESH_Multicast *) buf;
4534 memcpy (buf, message, ntohs (message->size));
4535 copy->oid = my_full_id;
4536 copy->tid = htonl (t->id.tid);
4537 copy->ttl = htonl (DEFAULT_TTL);
4538 copy->mid = htonl (t->mid + 1);
4539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4540 "MESH: calling generic handler...\n");
4541 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
4544 /* receive done gets called when last copy is sent to a neighbor */
4549 * Functions to handle messages from clients
4551 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4552 {&handle_local_new_client, NULL,
4553 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4554 {&handle_local_tunnel_create, NULL,
4555 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4556 sizeof (struct GNUNET_MESH_TunnelMessage)},
4557 {&handle_local_tunnel_destroy, NULL,
4558 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4559 sizeof (struct GNUNET_MESH_TunnelMessage)},
4560 {&handle_local_connect_add, NULL,
4561 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
4562 sizeof (struct GNUNET_MESH_PeerControl)},
4563 {&handle_local_connect_del, NULL,
4564 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
4565 sizeof (struct GNUNET_MESH_PeerControl)},
4566 {&handle_local_connect_by_type, NULL,
4567 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
4568 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
4569 {&handle_local_unicast, NULL,
4570 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4571 {&handle_local_to_origin, NULL,
4572 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4573 {&handle_local_multicast, NULL,
4574 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4580 * To be called on core init/fail.
4582 * @param cls service closure
4583 * @param server handle to the server for this service
4584 * @param identity the public identity of this peer
4587 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4588 const struct GNUNET_PeerIdentity *identity)
4590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
4591 core_handle = server;
4592 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4595 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
4596 GNUNET_SCHEDULER_shutdown ();
4602 * Method called whenever a given peer connects.
4604 * @param cls closure
4605 * @param peer peer identity this notification is about
4606 * @param atsi performance data for the connection
4607 * @param atsi_count number of records in 'atsi'
4610 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
4611 const struct GNUNET_ATS_Information *atsi,
4612 unsigned int atsi_count)
4614 struct MeshPeerInfo *peer_info;
4615 struct MeshPeerPath *path;
4617 DEBUG_CONN ("MESH: Peer connected\n");
4618 DEBUG_CONN ("MESH: %s\n", GNUNET_i2s (&my_full_id));
4619 peer_info = peer_info_get (peer);
4620 if (myid == peer_info->id)
4622 DEBUG_CONN ("MESH: (self)\n");
4627 DEBUG_CONN ("MESH: %s\n", GNUNET_i2s (peer));
4629 path = path_new (2);
4630 path->peers[0] = myid;
4631 path->peers[1] = peer_info->id;
4632 GNUNET_PEER_change_rc (myid, 1);
4633 GNUNET_PEER_change_rc (peer_info->id, 1);
4634 peer_info_add_path (peer_info, path, GNUNET_YES);
4639 * Method called whenever a peer disconnects.
4641 * @param cls closure
4642 * @param peer peer identity this notification is about
4645 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4647 struct MeshPeerInfo *pi;
4650 DEBUG_CONN ("MESH: Peer disconnected\n");
4651 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4657 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4659 /* TODO: notify that the transmission failed */
4660 peer_info_cancel_transmission (pi, i);
4662 peer_info_remove_path (pi, pi->id, myid);
4665 DEBUG_CONN ("MESH: (self)\n");
4671 /******************************************************************************/
4672 /************************ MAIN FUNCTIONS ****************************/
4673 /******************************************************************************/
4676 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4678 * @param cls closure
4679 * @param key current key code
4680 * @param value value in the hash map
4681 * @return GNUNET_YES if we should continue to iterate,
4685 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4687 struct MeshTunnel *t = value;
4694 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4696 * @param cls closure
4697 * @param key current key code
4698 * @param value value in the hash map
4699 * @return GNUNET_YES if we should continue to iterate,
4703 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4705 struct MeshPeerInfo *p = value;
4707 peer_info_destroy (p);
4712 * Task run during shutdown.
4718 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4722 if (core_handle != NULL)
4724 GNUNET_CORE_disconnect (core_handle);
4727 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4728 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4729 if (dht_handle != NULL)
4731 GNUNET_DHT_disconnect (dht_handle);
4736 GNUNET_SERVER_notification_context_destroy (nc);
4739 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4741 GNUNET_SCHEDULER_cancel (announce_id_task);
4742 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4748 * Process mesh requests.
4750 * @param cls closure
4751 * @param server the initialized server
4752 * @param c configuration to use
4755 run (void *cls, struct GNUNET_SERVER_Handle *server,
4756 const struct GNUNET_CONFIGURATION_Handle *c)
4758 struct MeshPeerInfo *peer;
4759 struct MeshPeerPath *p;
4762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4763 server_handle = server;
4764 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4765 CORE_QUEUE_SIZE, /* queue size */
4766 NULL, /* Closure passed to MESH functions */
4767 &core_init, /* Call core_init once connected */
4768 &core_connect, /* Handle connects */
4769 &core_disconnect, /* remove peers on disconnects */
4770 NULL, /* Don't notify about all incoming messages */
4771 GNUNET_NO, /* For header only in notification */
4772 NULL, /* Don't notify about all outbound messages */
4773 GNUNET_NO, /* For header-only out notification */
4774 core_handlers); /* Register these handlers */
4776 if (core_handle == NULL)
4779 GNUNET_SCHEDULER_shutdown ();
4784 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4787 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4789 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4790 GNUNET_SCHEDULER_shutdown ();
4793 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4794 GNUNET_free (keyfile);
4795 if (my_private_key == NULL)
4797 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4798 _("Mesh service could not access hostkey. Exiting.\n"));
4799 GNUNET_SCHEDULER_shutdown ();
4802 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4803 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4804 &my_full_id.hashPubKey);
4805 myid = GNUNET_PEER_intern (&my_full_id);
4807 // // transport_handle = GNUNET_TRANSPORT_connect(c,
4814 dht_handle = GNUNET_DHT_connect (c, 64);
4815 if (dht_handle == NULL)
4821 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4823 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4824 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4825 peers = GNUNET_CONTAINER_multihashmap_create (32);
4826 applications = GNUNET_CONTAINER_multihashmap_create (32);
4827 types = GNUNET_CONTAINER_multihashmap_create (32);
4829 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4830 nc = GNUNET_SERVER_notification_context_create (server_handle,
4832 GNUNET_SERVER_disconnect_notify (server_handle,
4833 &handle_local_client_disconnect, NULL);
4837 clients_tail = NULL;
4840 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4841 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4843 /* Create a peer_info for the local peer */
4844 peer = peer_info_get (&my_full_id);
4847 GNUNET_PEER_change_rc (myid, 1);
4848 peer_info_add_path (peer, p, GNUNET_YES);
4850 /* Scheduled the task to clean up when shutdown is called */
4851 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4858 * The main function for the mesh service.
4860 * @param argc number of arguments from the command line
4861 * @param argv command line arguments
4862 * @return 0 ok, 1 on error
4865 main (int argc, char *const *argv)
4869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4872 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4874 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");