2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - relay corking down to core
48 #include "mesh_protocol.h"
49 #include "gnunet_dht_service.h"
50 #include "mesh_tunnel_tree.h"
52 /* TODO: move into configuration file */
53 #define REFRESH_PATH_TIME GNUNET_TIME_relative_multiply(\
54 GNUNET_TIME_UNIT_SECONDS,\
56 #define APP_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
57 GNUNET_TIME_UNIT_SECONDS,\
60 #define ID_ANNOUNCE_TIME GNUNET_TIME_relative_multiply(\
61 GNUNET_TIME_UNIT_SECONDS,\
64 #define GET_RESTART_TIME GNUNET_TIME_relative_multiply(\
65 GNUNET_TIME_UNIT_SECONDS,\
68 #define UNACKNOWLEDGED_WAIT GNUNET_TIME_relative_multiply(\
69 GNUNET_TIME_UNIT_SECONDS,\
72 /******************************************************************************/
73 /************************ DATA STRUCTURES ****************************/
74 /******************************************************************************/
76 /** FWD declaration */
80 * Struct containing all info possibly needed to build a package when called
83 struct MeshDataDescriptor
85 /** ID of the tunnel this packet travels in */
86 struct MESH_TunnelID *origin;
91 /** Client that asked for the transmission, if any */
92 struct GNUNET_SERVER_Client *client;
94 /** Who was this message being sent to */
95 struct MeshPeerInfo *peer;
97 /** Ultimate destination of the packet */
98 GNUNET_PEER_Id destination;
100 /** Number of identical messages sent to different hops (multicast) */
101 unsigned int *copies;
103 /** Which handler was used to request the transmission */
104 unsigned int handler_n;
106 /** Size of the data */
109 /** Used to allow a client send more traffic to the service after a
110 * previous packet was tried to be sent to a neighbor and couldn't */
111 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
116 * Struct containing all information regarding a given peer
126 * Last time we heard from this peer
128 struct GNUNET_TIME_Absolute last_contact;
131 * Number of attempts to reconnect so far
133 int n_reconnect_attempts;
136 * Paths to reach the peer, ordered by ascending hop count
138 struct MeshPeerPath *path_head;
141 * Paths to reach the peer, ordered by ascending hop count
143 struct MeshPeerPath *path_tail;
146 * Handle to stop the DHT search for a path to this peer
148 struct GNUNET_DHT_GetHandle *dhtget;
151 * Closure given to the DHT GET
153 struct MeshPathInfo *dhtgetcls;
156 * Handles to stop queued transmissions for this peer
158 struct GNUNET_CORE_TransmitHandle *core_transmit[CORE_QUEUE_SIZE];
161 * Pointer to info stuctures used as cls for queued transmissions
163 void *infos[CORE_QUEUE_SIZE];
166 * Type of message being in each transmission
168 uint16_t types[CORE_QUEUE_SIZE];
171 * Array of tunnels this peer participates in
172 * (most probably a small amount, therefore not a hashmap)
173 * When the path to the peer changes, notify these tunnels to let them
174 * re-adjust their path trees.
176 struct MeshTunnel **tunnels;
179 * Number of tunnels this peers participates in
181 unsigned int ntunnels;
186 * Data scheduled to transmit (to local client or remote peer)
193 struct MeshQueue *next;
194 struct MeshQueue *prev;
197 * Target of the data (NULL if target is client)
199 struct MeshPeerInfo *peer;
202 * Client to send the data to (NULL if target is peer)
204 struct MeshClient *client;
207 * Size of the message to transmit
212 * How old is the data?
214 struct GNUNET_TIME_Absolute timestamp;
219 struct GNUNET_MessageHeader *data;
223 * Globally unique tunnel identification (owner + number)
224 * DO NOT USE OVER THE NETWORK
229 * Node that owns the tunnel
234 * Tunnel number to differentiate all the tunnels owned by the node oid
235 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
237 MESH_TunnelNumber tid;
241 struct MeshClient; /* FWD declaration */
244 * Struct containing all information regarding a tunnel
245 * For an intermediate node the improtant info used will be:
246 * - id Tunnel unique identification
247 * - paths[0] To know where to send it next
248 * - metainfo: ready, speeds, accounting
255 struct MESH_TunnelID id;
258 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
260 MESH_TunnelNumber local_tid;
263 * Last time the tunnel was used
265 struct GNUNET_TIME_Absolute timestamp;
268 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
269 * containing peers added by id or by type, not intermediate peers.
271 struct GNUNET_CONTAINER_MultiHashMap *peers;
274 * Number of peers that are connected and potentially ready to receive data
276 unsigned int peers_ready;
279 * Number of peers that have been added to the tunnel
281 unsigned int peers_total;
284 * Client owner of the tunnel, if any
286 struct MeshClient *client;
289 * Messages ready to transmit
291 struct MeshQueue *queue_head;
292 struct MeshQueue *queue_tail;
297 struct MeshTunnelTree *tree;
300 * Application type we are looking for in this tunnel
302 GNUNET_MESH_ApplicationType type;
305 * Used to search peers offering a service
307 struct GNUNET_DHT_GetHandle *dht_get_type;
310 * Task to keep the used paths alive
312 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
315 * Task to destroy the tunnel after timeout
317 * FIXME: merge the two? a tunnel will have either
318 * a path refresh OR a timeout, never both!
320 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
325 * Info needed to work with tunnel paths and peers
332 struct MeshTunnel *t;
335 * Neighbouring peer to whom we send the packet to
337 struct MeshPeerInfo *peer;
342 struct MeshPeerPath *path;
345 * Position in peer's transmit queue
352 * Struct containing information about a client of the service
359 struct MeshClient *next;
360 struct MeshClient *prev;
363 * Tunnels that belong to this client, indexed by local id
365 struct GNUNET_CONTAINER_MultiHashMap *tunnels;
368 * Handle to communicate with the client
370 struct GNUNET_SERVER_Client *handle;
373 * Applications that this client has claimed to provide
375 struct GNUNET_CONTAINER_MultiHashMap *apps;
378 * Messages that this client has declared interest in
380 struct GNUNET_CONTAINER_MultiHashMap *types;
384 * ID of the client, for debug messages
393 /******************************************************************************/
394 /************************ DEBUG FUNCTIONS ****************************/
395 /******************************************************************************/
399 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
400 * @param cls string to print
401 * @param tc task context
404 mesh_debug (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
408 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n", s);
416 /******************************************************************************/
417 /*********************** GLOBAL VARIABLES ****************************/
418 /******************************************************************************/
423 static struct MeshClient *clients;
424 static struct MeshClient *clients_tail;
427 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel)
429 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
432 * Tunnels incoming, indexed by MESH_TunnelNumber
433 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
435 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
438 * Peers known, indexed by PeerIdentity (MeshPeerInfo)
440 static struct GNUNET_CONTAINER_MultiHashMap *peers;
443 * Handle to communicate with core
445 static struct GNUNET_CORE_Handle *core_handle;
450 static struct GNUNET_DHT_Handle *dht_handle;
455 static struct GNUNET_SERVER_Handle *server_handle;
458 * Notification context, to send messages to local clients
460 static struct GNUNET_SERVER_NotificationContext *nc;
463 * Local peer own ID (memory efficient handle)
465 static GNUNET_PEER_Id myid;
468 * Local peer own ID (full value)
470 static struct GNUNET_PeerIdentity my_full_id;
475 static struct GNUNET_CRYPTO_RsaPrivateKey* my_private_key;
480 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
483 * Tunnel ID for the next created tunnel (global tunnel number)
485 static MESH_TunnelNumber next_tid;
488 * Tunnel ID for the next incoming tunnel (local tunnel number)
490 static MESH_TunnelNumber next_local_tid;
493 * All application types provided by this peer
495 static struct GNUNET_CONTAINER_MultiHashMap *applications;
498 * All message types clients of this peer are interested in
500 static struct GNUNET_CONTAINER_MultiHashMap *types;
503 * Task to periodically announce provided applications
505 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
508 * Task to periodically announce itself in the network
510 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
513 unsigned int next_client_id;
517 /******************************************************************************/
518 /************************ ITERATORS ****************************/
519 /******************************************************************************/
521 /* FIXME move iterators here */
524 /******************************************************************************/
525 /************************ PERIODIC FUNCTIONS ****************************/
526 /******************************************************************************/
529 * Announce iterator over for each application provided by the peer
532 * @param key current key code
533 * @param value value in the hash map
534 * @return GNUNET_YES if we should continue to
539 announce_application (void *cls, const GNUNET_HashCode * key, void *value)
541 /* FIXME are hashes in multihash map equal on all aquitectures? */
542 GNUNET_DHT_put (dht_handle,
545 GNUNET_DHT_RO_RECORD_ROUTE |
546 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
547 GNUNET_BLOCK_TYPE_TEST,
548 sizeof (struct GNUNET_PeerIdentity),
549 (const char *) &my_full_id,
551 GNUNET_TIME_UNIT_FOREVER_ABS, GNUNET_TIME_UNIT_FOREVER_REL,
552 &mesh_debug, "DHT_put for app completed");
554 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
556 APP_ANNOUNCE_TIME, NULL, NULL);
563 * Periodically announce what applications are provided by local clients
566 * @param tc task context
569 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
571 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
573 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Starting PUT for apps\n");
577 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
579 announce_applications_task =
580 GNUNET_SCHEDULER_add_delayed (APP_ANNOUNCE_TIME, &announce_applications,
582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Finished PUT for apps\n");
588 * Periodically announce self id in the DHT
591 * @param tc task context
594 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
596 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
598 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
602 * - Set data expiration in function of X
605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: DHT_put for ID %s started.\n",
606 GNUNET_h2s_full (&my_full_id.hashPubKey));
607 GNUNET_DHT_put (dht_handle, /* DHT handle */
608 &my_full_id.hashPubKey, /* Key to use */
609 10U, /* Replication level */
610 GNUNET_DHT_RO_RECORD_ROUTE |
611 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
612 GNUNET_BLOCK_TYPE_TEST, /* Block type */
613 sizeof(my_full_id), /* Size of the data */
614 (char *)&my_full_id, /* Data itself */
615 GNUNET_TIME_absolute_get_forever (), /* Data expiration */
616 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
618 &mesh_debug, "DHT_put for id completed");
620 NULL, /* Continuation */
621 NULL); /* Continuation closure */
624 GNUNET_SCHEDULER_add_delayed (ID_ANNOUNCE_TIME, &announce_id, cls);
629 * Function to process paths received for a new peer addition. The recorded
630 * paths form the initial tunnel, which can be optimized later.
631 * Called on each result obtained for the DHT search.
634 * @param exp when will this value expire
635 * @param key key of the result
636 * @param type type of the result
637 * @param size number of bytes in data
638 * @param data pointer to the result data
641 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
642 const GNUNET_HashCode * key,
643 const struct GNUNET_PeerIdentity *get_path,
644 unsigned int get_path_length,
645 const struct GNUNET_PeerIdentity *put_path,
646 unsigned int put_path_length,
647 enum GNUNET_BLOCK_Type type, size_t size, const void *data);
650 /******************************************************************************/
651 /****************** GENERAL HELPER FUNCTIONS ************************/
652 /******************************************************************************/
655 * Check if client has registered with the service and has not disconnected
657 * @param client the client to check
659 * @return non-NULL if client exists in the global DLL
661 static struct MeshClient *
662 client_get (struct GNUNET_SERVER_Client *client)
664 struct MeshClient *c;
669 if (c->handle == client)
678 * Checks if a given client has subscribed to certain message type
680 * @param message_type Type of message to check
681 * @param c Client to check
683 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
688 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
692 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
693 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
697 client_allow_send(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
699 struct MeshDataDescriptor *info = cls;
701 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
703 info->timeout_task = GNUNET_SCHEDULER_NO_TASK;
704 GNUNET_SERVER_receive_done(info->client, GNUNET_OK);
709 * Search for a tunnel by global ID using full PeerIdentities
711 * @param oid owner of the tunnel
712 * @param tid global tunnel number
714 * @return tunnel handler, NULL if doesn't exist
716 static struct MeshTunnel *
717 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
721 * Send the message to all clients that have subscribed to its type
723 * @param msg Pointer to the message itself
724 * @return number of clients this message was sent to
727 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
728 const struct GNUNET_MessageHeader *payload)
730 struct GNUNET_PeerIdentity *oid;
731 struct MeshClient *c;
732 struct MeshTunnel *t;
733 MESH_TunnelNumber *tid;
736 char cbuf[htons(msg->size)];
738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Sending to clients...\n");
739 type = ntohs (payload->type);
740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: message of type %u\n", type);
742 memcpy (cbuf, msg, sizeof(cbuf));
743 switch (htons(msg->type))
745 struct GNUNET_MESH_Unicast *uc;
746 struct GNUNET_MESH_Multicast *mc;
747 struct GNUNET_MESH_ToOrigin *to;
749 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
750 uc = (struct GNUNET_MESH_Unicast *) cbuf;
754 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
755 mc = (struct GNUNET_MESH_Multicast *) cbuf;
759 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
760 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
768 t = tunnel_get (oid, ntohl(*tid));
774 *tid = htonl (t->local_tid);
775 for (count = 0, c = clients; c != NULL; c = c->next)
777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client %u\n", c->id);
778 if (client_is_subscribed (type, c))
781 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: sending\n");
782 GNUNET_SERVER_notification_context_unicast (
785 (struct GNUNET_MessageHeader *) cbuf,
794 * Notify the client that owns the tunnel that a peer has connected to it
795 * (the requested path to it has been confirmed).
797 * @param t Tunnel whose owner to notify
798 * @param id Short id of the peer that has connected
801 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
803 struct GNUNET_MESH_PeerControl pc;
805 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
806 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
807 pc.tunnel_id = htonl (t->local_tid);
808 GNUNET_PEER_resolve (id, &pc.peer);
809 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
810 &pc.header, GNUNET_NO);
815 * Notify all clients (not depending on registration status) that the incoming
816 * tunnel is no longer valid.
818 * @param t Tunnel that was destroyed.
821 send_clients_tunnel_destroy (struct MeshTunnel *t)
823 struct GNUNET_MESH_TunnelMessage msg;
825 msg.header.size = htons (sizeof (msg));
826 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
827 msg.tunnel_id = htonl (t->local_tid);
828 GNUNET_SERVER_notification_context_broadcast(nc, &msg.header, GNUNET_NO);
833 * Function called to notify a client about the socket
834 * being ready to queue more data. "buf" will be
835 * NULL and "size" zero if the socket was closed for
836 * writing in the meantime.
839 * @param size number of bytes available in buf
840 * @param buf where the callee should write the message
841 * @return number of bytes written to buf
844 send_core_create_path (void *cls, size_t size, void *buf);
848 * Function called to notify a client about the socket
849 * being ready to queue more data. "buf" will be
850 * NULL and "size" zero if the socket was closed for
851 * writing in the meantime.
853 * @param cls closure (data itself)
854 * @param size number of bytes available in buf
855 * @param buf where the callee should write the message
857 * @return number of bytes written to buf
860 send_core_data_multicast (void *cls, size_t size, void *buf);
864 * Cancel a core transmission that was already requested and free all resources
865 * associated to the request.
867 * @param peer PeeInfo of the peer whose transmission is cancelled.
868 * @param i Position of the transmission to be cancelled.
871 peer_info_cancel_transmission(struct MeshPeerInfo *peer, unsigned int i)
873 if (NULL != peer->core_transmit[i])
875 struct MeshDataDescriptor *dd;
876 struct MeshPathInfo *path_info;
880 struct GNUNET_PeerIdentity id;
882 GNUNET_PEER_resolve (peer->id, &id);
883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
884 "MESH: Cancelling data transmission at %s [%u]\n",
887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
888 "MESH: message type %u\n",
892 /* TODO: notify that tranmission has failed */
893 switch (peer->types[i])
895 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
896 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
897 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type payload\n");
900 if (0 == --(*dd->copies))
902 GNUNET_free (dd->copies);
903 GNUNET_free (dd->data);
906 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
907 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type create path\n");
908 path_info = peer->infos[i];
909 path_destroy(path_info->path);
913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type unknown!\n");
915 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit[i]);
916 peer->core_transmit[i] = NULL;
917 GNUNET_free (peer->infos[i]);
923 * Get a unused CORE slot to transmit a message to a peer. If all the slots
924 * are used, cancel one and return it's position.
926 * @param peer PeerInfo of the neighbor we want to transmit to.
928 * @return The index of an available slot to transmit to the neighbor.
931 peer_info_transmit_slot (struct MeshPeerInfo *peer)
935 for (i = 0; peer->core_transmit[i]; i++)
937 if (i == (CORE_QUEUE_SIZE - 1))
939 /* All positions are taken! Overwriting! */
941 peer_info_cancel_transmission(peer, 0);
950 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
951 * and insert it in the appropiate structures if the peer is not known yet.
953 * @param peer Full identity of the peer.
955 * @return Existing or newly created peer info.
957 static struct MeshPeerInfo *
958 peer_info_get (const struct GNUNET_PeerIdentity *peer)
960 struct MeshPeerInfo *peer_info;
962 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
963 if (NULL == peer_info)
966 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
967 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
968 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
969 peer_info->id = GNUNET_PEER_intern (peer);
977 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
978 * and insert it in the appropiate structures if the peer is not known yet.
980 * @param peer Short identity of the peer.
982 * @return Existing or newly created peer info.
984 static struct MeshPeerInfo *
985 peer_info_get_short (const GNUNET_PEER_Id peer)
987 struct GNUNET_PeerIdentity id;
989 GNUNET_PEER_resolve(peer, &id);
990 return peer_info_get(&id);
995 * Iterator to remove the tunnel from the list of tunnels a peer participates
998 * @param cls Closure (tunnel info)
999 * @param key GNUNET_PeerIdentity of the peer (unused)
1000 * @param value PeerInfo of the peer
1002 * @return always GNUNET_YES, to keep iterating
1005 peer_info_delete_tunnel (void* cls, const GNUNET_HashCode* key, void* value)
1007 struct MeshTunnel *t = cls;
1008 struct MeshPeerInfo *peer = value;
1011 for (i = 0; i < peer->ntunnels; i++)
1013 if (0 == memcmp(&peer->tunnels[i]->id,
1015 sizeof(struct MESH_TunnelID)))
1018 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1019 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
1028 * Core callback to write a
1030 * @param cls Closure (MeshDataDescriptor with data in "data" member).
1031 * @param size Number of bytes available in buf.
1032 * @param buf Where the to write the message.
1034 * @return number of bytes written to buf
1037 send_core_data_raw (void *cls, size_t size, void *buf)
1039 struct MeshDataDescriptor *info = cls;
1040 struct GNUNET_MessageHeader *msg;
1043 GNUNET_assert (NULL != info);
1044 GNUNET_assert (NULL != info->data);
1045 msg = (struct GNUNET_MessageHeader *) info->data;
1046 total_size = ntohs (msg->size);
1048 if (total_size > size)
1050 struct GNUNET_PeerIdentity id;
1052 GNUNET_PEER_resolve (info->peer->id, &id);
1053 info->peer->core_transmit[info->handler_n] =
1054 GNUNET_CORE_notify_transmit_ready(core_handle,
1057 GNUNET_TIME_UNIT_FOREVER_REL,
1060 &send_core_data_raw,
1064 info->peer->core_transmit[info->handler_n] = NULL;
1065 memcpy (buf, msg, total_size);
1066 GNUNET_free (info->data);
1073 * Sends an already built message to a peer, properly registrating
1074 * all used resources.
1076 * @param message Message to send.
1077 * @param peer Short ID of the neighbor whom to send the message.
1080 send_message (const struct GNUNET_MessageHeader *message,
1081 const struct GNUNET_PeerIdentity *peer)
1083 struct MeshDataDescriptor *info;
1084 struct MeshPeerInfo *neighbor;
1088 size = ntohs (message->size);
1089 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1090 info->data = GNUNET_malloc (size);
1091 memcpy (info->data, message, size);
1092 neighbor = peer_info_get (peer);
1093 i = peer_info_transmit_slot (neighbor);
1094 info->handler_n = i;
1095 info->peer = neighbor;
1096 neighbor->types[i] = GNUNET_MESSAGE_TYPE_MESH_UNICAST;
1097 neighbor->infos[i] = info;
1098 neighbor->core_transmit[i] =
1099 GNUNET_CORE_notify_transmit_ready(core_handle,
1102 GNUNET_TIME_UNIT_FOREVER_REL,
1105 &send_core_data_raw,
1112 * Sends a CREATE PATH message for a path to a peer, properly registrating
1113 * all used resources.
1115 * @param peer PeerInfo of the final peer for whom this path is being created.
1116 * @param p Path itself.
1117 * @param t Tunnel for which the path is created.
1120 send_create_path (struct MeshPeerInfo *peer,
1121 struct MeshPeerPath *p,
1122 struct MeshTunnel *t)
1124 struct GNUNET_PeerIdentity id;
1125 struct MeshPathInfo *path_info;
1126 struct MeshPeerInfo *neighbor;
1131 p = tree_get_path_to_peer(t->tree, peer->id);
1138 for (i = 0; i < p->length; i++)
1140 if (p->peers[i] == myid)
1143 if (i >= p->length - 1)
1149 GNUNET_PEER_resolve(p->peers[i + 1], &id);
1151 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
1152 path_info->path = p;
1154 neighbor = peer_info_get(&id);
1155 path_info->peer = neighbor;
1156 path_info->pos = peer_info_transmit_slot(neighbor);
1157 neighbor->types[path_info->pos] = GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE;
1158 neighbor->infos[path_info->pos] = path_info;
1159 neighbor->core_transmit[path_info->pos] =
1160 GNUNET_CORE_notify_transmit_ready (
1161 core_handle, /* handle */
1164 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1166 sizeof (struct GNUNET_MESH_ManipulatePath)
1167 + (p->length * sizeof (struct GNUNET_PeerIdentity)), /*size */
1168 &send_core_create_path, /* callback */
1169 path_info); /* cls */
1174 * Sends a DESTROY PATH message to free resources for a path in a tunnel
1176 * @param t Tunnel whose path to destroy.
1177 * @param destination Short ID of the peer to whom the path to destroy.
1180 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
1182 struct GNUNET_MESH_ManipulatePath *msg;
1183 struct GNUNET_PeerIdentity *pi;
1184 struct MeshPeerPath *p;
1188 p = tree_get_path_to_peer(t->tree, destination);
1194 size = sizeof (struct GNUNET_MESH_ManipulatePath);
1195 size += p->length * sizeof (struct GNUNET_PeerIdentity);
1196 msg = GNUNET_malloc (size);
1197 msg->header.size = htons (size);
1198 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
1199 msg->tid = htonl (t->id.tid);
1200 pi = (struct GNUNET_PeerIdentity *) &msg[1];
1201 for (i = 0; i < p->length; i++)
1203 GNUNET_PEER_resolve(p->peers[i], &pi[i]);
1205 send_message (&msg->header, path_get_first_hop(t->tree, destination));
1211 * Try to establish a new connection to this peer.
1212 * Use the best path for the given tunnel.
1213 * If the peer doesn't have any path to it yet, try to get one.
1214 * If the peer already has some path, send a CREATE PATH towards it.
1216 * @param peer PeerInfo of the peer.
1217 * @param t Tunnel for which to create the path, if possible.
1220 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1222 struct MeshPeerPath *p;
1223 struct MeshPathInfo *path_info;
1225 if (NULL != peer->path_head)
1227 p = tree_get_path_to_peer(t->tree, peer->id);
1230 send_create_path(peer, p, t);
1235 send_client_peer_connected(t, myid);
1238 else if (NULL == peer->dhtget)
1240 struct GNUNET_PeerIdentity id;
1242 GNUNET_PEER_resolve(peer->id, &id);
1243 path_info = GNUNET_malloc(sizeof(struct MeshPathInfo));
1244 path_info->peer = peer;
1246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1247 "MESH: Starting DHT GET for peer %s\n",
1249 peer->dhtgetcls = path_info;
1251 GNUNET_DHT_get_start(dht_handle, /* handle */
1252 GNUNET_TIME_UNIT_FOREVER_REL, /* timeout */
1253 GNUNET_BLOCK_TYPE_TEST, /* type */
1254 &id.hashPubKey, /* key to search */
1255 4, /* replication level */
1256 GNUNET_DHT_RO_RECORD_ROUTE |
1257 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1259 0, /* xquery bits */
1260 &dht_get_id_handler,
1263 /* Otherwise, there is no path but the DHT get is already started. */
1268 * Destroy the peer_info and free any allocated resources linked to it
1270 * @param pi The peer_info to destroy.
1272 * @return GNUNET_OK on success
1275 peer_info_destroy (struct MeshPeerInfo *pi)
1277 struct GNUNET_PeerIdentity id;
1278 GNUNET_HashCode hash;
1279 struct MeshPeerPath *p;
1280 struct MeshPeerPath *nextp;
1283 GNUNET_PEER_resolve (pi->id, &id);
1284 GNUNET_PEER_change_rc (pi->id, -1);
1285 GNUNET_CRYPTO_hash (&id, sizeof (struct GNUNET_PeerIdentity), &hash);
1287 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi);
1288 if (NULL != pi->dhtget)
1290 GNUNET_DHT_get_stop(pi->dhtget);
1291 GNUNET_free (pi->dhtgetcls);
1293 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1295 peer_info_cancel_transmission(pi, i);
1301 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1311 * Notify a tunnel that a connection has broken that affects at least
1312 * some of its peers.
1314 * @param t Tunnel affected.
1315 * @param peer Peer that (at least) has been affected by the disconnection.
1316 * @param p1 Peer that got disconnected from p2.
1317 * @param p2 Peer that got disconnected from p1.
1319 * @return Short ID of the peer disconnected (either p1 or p2).
1320 * 0 if the tunnel remained unaffected.
1322 static GNUNET_PEER_Id
1323 tunnel_notify_connection_broken (struct MeshTunnel *t,
1324 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1329 * Remove all paths that rely on a direct connection between p1 and p2
1330 * from the peer itself and notify all tunnels about it.
1332 * @param peer PeerInfo of affected peer.
1333 * @param p1 GNUNET_PEER_Id of one peer.
1334 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1337 * TODO: optimize (see below)
1340 path_remove_from_peer (struct MeshPeerInfo *peer,
1344 struct MeshPeerPath *p;
1345 struct MeshPeerPath *aux;
1346 struct MeshPeerInfo *peer_d;
1348 unsigned int destroyed;
1354 p = peer->path_head;
1358 for (i = 0; i < (p->length - 1); i++)
1360 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1361 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1363 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1374 for (i = 0; i < peer->ntunnels; i++)
1376 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
1378 * Problem: one or more peers have been deleted from the tunnel tree.
1379 * We don't know who they are to try to add them again.
1380 * We need to try to find a new path for each of the disconnected peers.
1381 * Some of them might already have a path to reach them that does not
1382 * involve p1 and p2. Adding all anew might render in a better tree than
1383 * the trivial immediate fix.
1385 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1386 * its children will be reachable trough him.
1388 peer_d = peer_info_get_short(d);
1391 for (p = peer_d->path_head; NULL != p; p = p->next)
1393 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1401 /* No callback, as peer will be already disconnected */
1402 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1406 peer_info_connect (peer_d, peer->tunnels[i]);
1413 * Add the path to the peer and update the path used to reach it in case this
1416 * @param peer_info Destination peer to add the path to.
1417 * @param path New path to add. Last peer must be the peer in arg 1.
1418 * Path will be either used of freed if already known.
1420 * TODO: trim the part from origin to us? Add it as path to origin?
1423 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1425 struct MeshPeerPath *aux;
1429 if (NULL == peer_info || NULL == path)
1435 l = path_get_length (path);
1442 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1444 l2 = path_get_length (aux);
1447 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1448 peer_info->path_tail, aux, path);
1452 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1459 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1466 * Add the path to the origin peer and update the path used to reach it in case
1467 * this is the shortest.
1468 * The path is given in peer_info -> destination, therefore we turn the path
1469 * upside down first.
1471 * @param peer_info Peer to add the path to, being the origin of the path.
1472 * @param path New path to add after being inversed.
1475 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1478 path_add_to_peer (peer_info, path);
1483 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1484 * to obtain a local peer -> destination path and interning the peer ids.
1486 * @return Newly allocated and created path
1488 static struct MeshPeerPath *
1489 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1490 unsigned int get_path_length,
1491 const struct GNUNET_PeerIdentity *put_path,
1492 unsigned int put_path_length)
1494 struct MeshPeerPath *p;
1500 GNUNET_PEER_change_rc(myid, 1);
1501 i = get_path_length;
1502 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1503 for (i--; i >= 0; i--)
1505 id = GNUNET_PEER_intern (&get_path[i]);
1506 if (p->length > 0 && id == p->peers[p->length - 1])
1508 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1509 GNUNET_PEER_change_rc(id, -1);
1513 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1514 "MESH: Adding from GET: %s.\n",
1515 GNUNET_i2s(&get_path[i]));
1517 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1518 p->peers[p->length - 1] = id;
1521 i = put_path_length;
1522 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1523 for (i--; i >= 0; i--)
1525 id = GNUNET_PEER_intern (&put_path[i]);
1528 /* PUT path went through us, so discard the path up until now and start
1529 * from here to get a much shorter (and loop-free) path.
1534 if (p->length > 0 && id == p->peers[p->length - 1])
1536 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1537 GNUNET_PEER_change_rc(id, -1);
1541 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1542 "MESH: Adding from PUT: %s.\n",
1543 GNUNET_i2s(&put_path[i]));
1545 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1546 p->peers[p->length - 1] = id;
1550 if (get_path_length > 0)
1551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1552 "MESH: (first of GET: %s)\n",
1553 GNUNET_h2s_full(&get_path[0].hashPubKey));
1554 if (put_path_length > 0)
1555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1556 "MESH: (first of PUT: %s)\n",
1557 GNUNET_h2s_full(&put_path[0].hashPubKey));
1558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1559 "MESH: In total: %d hops\n",
1561 for (i = 0; i < p->length; i++)
1563 struct GNUNET_PeerIdentity peer_id;
1565 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1569 GNUNET_h2s_full(&peer_id.hashPubKey));
1577 * Send keepalive packets for a peer
1579 * @param cls Closure (tunnel for which to send the keepalive).
1580 * @param tc Notification context.
1582 * TODO: implement explicit multicast keepalive?
1585 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1589 * Search for a tunnel among the tunnels for a client
1591 * @param c the client whose tunnels to search in
1592 * @param tid the local id of the tunnel
1594 * @return tunnel handler, NULL if doesn't exist
1596 static struct MeshTunnel *
1597 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1599 GNUNET_HashCode hash;
1601 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1602 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1604 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1606 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1611 * Search for a tunnel by global ID using PEER_ID
1613 * @param pi owner of the tunnel
1614 * @param tid global tunnel number
1616 * @return tunnel handler, NULL if doesn't exist
1618 static struct MeshTunnel *
1619 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1621 struct MESH_TunnelID id;
1622 GNUNET_HashCode hash;
1627 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1628 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1633 * Search for a tunnel by global ID using full PeerIdentities
1635 * @param oid owner of the tunnel
1636 * @param tid global tunnel number
1638 * @return tunnel handler, NULL if doesn't exist
1640 static struct MeshTunnel *
1641 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1643 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1648 * Callback used to notify a client owner of a tunnel that a peer has
1649 * disconnected, most likely because of a path change.
1651 * @param n Node in the tree representing the disconnected peer
1654 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1656 struct MeshPeerInfo *peer;
1658 if (NULL != n->t->client && NULL != nc)
1660 struct GNUNET_MESH_PeerControl msg;
1661 msg.header.size = htons (sizeof (msg));
1662 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1663 msg.tunnel_id = htonl (n->t->local_tid);
1664 GNUNET_PEER_resolve (n->peer, &msg.peer);
1665 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1666 &msg.header, GNUNET_NO);
1668 peer = peer_info_get_short(n->peer);
1669 peer_info_connect(peer, n->t);
1674 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1675 * needed rescources.
1676 * If peer already exists, reevaluate shortest path and change if different.
1678 * @param t Tunnel we want to add a new peer to
1679 * @param peer PeerInfo of the peer being added
1683 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1685 struct GNUNET_PeerIdentity id;
1686 struct MeshPeerPath *best_p;
1687 struct MeshPeerPath *p;
1688 unsigned int best_cost;
1691 GNUNET_PEER_resolve(peer->id, &id);
1693 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1696 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1697 GNUNET_CONTAINER_multihashmap_put(
1701 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1704 if (NULL != (p = peer->path_head))
1707 best_cost = path_get_cost(t->tree, p);
1710 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1717 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1718 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1719 t->path_refresh_task =
1720 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1724 /* Start a DHT get if necessary */
1725 peer_info_connect(peer, t);
1730 * Add a path to a tunnel which we don't own, just to remember the next hop.
1731 * If destination node was already in the tunnel, the first hop information
1732 * will be replaced with the new path.
1734 * @param t Tunnel we want to add a new peer to
1735 * @param p Path to add
1736 * @param own_pos Position of local node in path.
1740 tunnel_add_path (struct MeshTunnel *t,
1741 struct MeshPeerPath *p,
1742 unsigned int own_pos)
1744 struct GNUNET_PeerIdentity id;
1746 GNUNET_assert (0 != own_pos);
1747 tree_add_path(t->tree, p, NULL);
1748 if (NULL == t->tree->me)
1749 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1750 if (own_pos < p->length - 1)
1752 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1753 tree_update_first_hops(t->tree, t->tree->me, &id);
1759 * Notify a tunnel that a connection has broken that affects at least
1760 * some of its peers.
1762 * @param t Tunnel affected.
1763 * @param peer Peer that (at least) has been affected by the disconnection.
1764 * @param p1 Peer that got disconnected from p2.
1765 * @param p2 Peer that got disconnected from p1.
1767 * @return Short ID of the peer disconnected (either p1 or p2).
1768 * 0 if the tunnel remained unaffected.
1770 static GNUNET_PEER_Id
1771 tunnel_notify_connection_broken (struct MeshTunnel *t,
1772 struct MeshPeerInfo *peer,
1776 return tree_notify_connection_broken (t->tree, p1, p2,
1777 ¬ify_peer_disconnected);
1782 * Send a message in a tunnel in multicast, sending a copy to each child node
1783 * down the local one in the tunnel tree.
1785 * @param t Tunnel in which to send the data.
1786 * @param msg Message to be sent
1788 * @return Number of copies sent.
1791 tunnel_send_multicast (struct MeshTunnel *t,
1792 const struct GNUNET_MessageHeader *msg)
1794 struct GNUNET_PeerIdentity neighbor;
1795 struct MeshDataDescriptor *info;
1796 struct MeshTunnelTreeNode *n;
1797 unsigned int *copies;
1802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1803 "MESH: sending a multicast packet...\n");
1804 size = ntohs (msg->size);
1805 GNUNET_assert (NULL != t->tree->me);
1806 n = t->tree->me->children_head;
1809 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1810 "MESH: no children in the tree, no one to send.\n");
1813 copies = GNUNET_malloc (sizeof (unsigned int));
1814 for (*copies = 0; NULL != n; n = n->next)
1816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1817 n = t->tree->me->children_head;
1818 data = GNUNET_malloc (size);
1819 memcpy (data, msg, size);
1822 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1825 info->copies = copies;
1826 if (NULL != t->client)
1828 info->client = t->client->handle;
1829 info->timeout_task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1833 info->destination = n->peer;
1834 GNUNET_PEER_resolve (n->peer, &neighbor);
1835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1836 "MESH: sending to %s...\n",
1837 GNUNET_i2s (&neighbor));
1838 info->peer = peer_info_get(&neighbor);
1839 GNUNET_assert (NULL != info->peer);
1840 i = peer_info_transmit_slot(info->peer);
1841 info->handler_n = i;
1842 info->peer->infos[i] = info;
1843 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1844 info->peer->core_transmit[i] =
1845 GNUNET_CORE_notify_transmit_ready (core_handle,
1848 GNUNET_TIME_UNIT_FOREVER_REL,
1851 &send_core_data_multicast, info);
1859 * Send a message to all peers in this tunnel that the tunnel is no longer
1862 * @param t The tunnel whose peers to notify.
1865 tunnel_send_destroy (struct MeshTunnel *t)
1867 struct GNUNET_MESH_TunnelDestroy msg;
1869 msg.header.size = htons (sizeof (msg));
1870 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
1871 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1872 msg.tid = htonl (t->id.tid);
1873 tunnel_send_multicast (t, &msg.header);
1879 * Destroy the tunnel and free any allocated resources linked to it
1881 * @param t the tunnel to destroy
1883 * @return GNUNET_OK on success
1886 tunnel_destroy (struct MeshTunnel *t)
1888 struct MeshClient *c;
1889 struct MeshQueue *q;
1890 struct MeshQueue *qn;
1891 GNUNET_HashCode hash;
1900 struct GNUNET_PeerIdentity id;
1902 GNUNET_PEER_resolve(t->id.oid, &id);
1903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1904 "MESH: destroying tunnel %s [%x]\n",
1908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1912 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1913 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1918 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1920 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1924 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1926 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1927 GNUNET_break (GNUNET_YES ==
1928 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
1931 if (NULL != t->peers)
1933 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
1934 &peer_info_delete_tunnel, t);
1935 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1940 if (NULL != q->data)
1941 GNUNET_free (q->data);
1945 /* TODO cancel core transmit ready in case it was active */
1947 tree_destroy(t->tree);
1948 if (NULL != t->dht_get_type)
1949 GNUNET_DHT_get_stop(t->dht_get_type);
1950 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
1951 GNUNET_SCHEDULER_cancel(t->timeout_task);
1952 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
1953 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
1960 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1961 * that are no longer needed, as well as nodes of no longer reachable peers.
1962 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1964 * @param t Tunnel from which to remove the path.
1965 * @param p Peer which should be removed.
1968 tunnel_delete_peer (struct MeshTunnel *t,
1969 GNUNET_PEER_Id peer)
1971 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
1972 if (NULL == t->tree->root)
1978 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1979 * client when the client disconnects.
1981 * @param cls closure (client that is disconnecting)
1982 * @param key the hash of the local tunnel id (used to access the hashmap)
1983 * @param value the value stored at the key (tunnel to destroy)
1985 * @return GNUNET_OK on success
1988 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1990 struct MeshTunnel *t = value;
1993 if (NULL != t->dht_get_type)
1995 GNUNET_DHT_get_stop (t->dht_get_type);
1997 r = tunnel_destroy (t);
2003 * Timeout function, destroys tunnel if called
2005 * @param cls Closure (tunnel to destroy).
2006 * @param tc TaskContext
2009 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2011 struct MeshTunnel *t = cls;
2013 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2015 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2020 * Resets the tunnel timeout. Starts it if no timeout was running.
2022 * @param t Tunnel whose timeout to reset.
2025 tunnel_reset_timeout (struct MeshTunnel *t)
2027 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2028 GNUNET_SCHEDULER_cancel (t->timeout_task);
2029 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2030 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2036 /******************************************************************************/
2037 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2038 /******************************************************************************/
2041 * Function called to notify a client about the socket
2042 * being ready to queue more data. "buf" will be
2043 * NULL and "size" zero if the socket was closed for
2044 * writing in the meantime.
2046 * @param cls closure
2047 * @param size number of bytes available in buf
2048 * @param buf where the callee should write the message
2049 * @return number of bytes written to buf
2052 send_core_create_path (void *cls, size_t size, void *buf)
2054 struct MeshPathInfo *info = cls;
2055 struct GNUNET_MESH_ManipulatePath *msg;
2056 struct GNUNET_PeerIdentity *peer_ptr;
2057 struct MeshPeerInfo *peer = info->peer;
2058 struct MeshTunnel *t = info->t;
2059 struct MeshPeerPath *p = info->path;
2063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2064 "MESH: CREATE PATH sending...\n");
2066 sizeof (struct GNUNET_MESH_ManipulatePath) +
2067 p->length * sizeof (struct GNUNET_PeerIdentity);
2069 if (size < size_needed || NULL == buf)
2071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2075 info->peer->core_transmit[info->pos] =
2076 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2077 GNUNET_TIME_UNIT_FOREVER_REL,
2078 path_get_first_hop (t->tree, peer->id),
2080 &send_core_create_path,
2084 info->peer->core_transmit[info->pos] = NULL;
2087 struct GNUNET_PeerIdentity id;
2089 GNUNET_PEER_resolve (peer->id, &id);
2090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2091 "MESH: setting core_transmit %s [%u] to NULL\n",
2096 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2097 msg->header.size = htons (size_needed);
2098 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2099 msg->tid = ntohl (t->id.tid);
2101 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2102 for (i = 0; i < p->length; i++)
2104 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2111 "MESH: CREATE PATH (%u bytes long) sent!\n",
2118 * Function called to notify a client about the socket
2119 * being ready to queue more data. "buf" will be
2120 * NULL and "size" zero if the socket was closed for
2121 * writing in the meantime.
2123 * @param cls closure (data itself)
2124 * @param size number of bytes available in buf
2125 * @param buf where the callee should write the message
2127 * @return number of bytes written to buf
2130 send_core_data_multicast (void *cls, size_t size, void *buf)
2132 struct MeshDataDescriptor *info = cls;
2135 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2136 GNUNET_assert (NULL != info);
2137 GNUNET_assert (NULL != info->peer);
2138 total_size = info->size;
2139 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2141 if (total_size > size)
2144 struct GNUNET_PeerIdentity id;
2146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2147 "MESH: Multicast: retransmitting... (%u/%u)\n",
2149 GNUNET_PEER_resolve(info->peer->id, &id);
2150 info->peer->core_transmit[info->handler_n] =
2151 GNUNET_CORE_notify_transmit_ready (core_handle,
2154 GNUNET_TIME_UNIT_FOREVER_REL,
2157 &send_core_data_multicast,
2161 info->peer->core_transmit[info->handler_n] = NULL;
2162 info->peer->infos[info->handler_n] = NULL;
2163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2164 memcpy (buf, info->data, total_size);
2167 struct GNUNET_MESH_Multicast *mc;
2168 struct GNUNET_MessageHeader *mh;
2171 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2173 mc = (struct GNUNET_MESH_Multicast *) mh;
2174 mh = (struct GNUNET_MessageHeader *) &mc[1];
2175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2176 "MESH: multicast, payload type %u\n",
2178 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2179 "MESH: multicast, payload size %u\n",
2184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2190 if (0 == --(*info->copies))
2192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
2193 if (NULL != info->client)
2195 if (GNUNET_SCHEDULER_NO_TASK != info->timeout_task)
2197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2198 "MESH: cancelling client timeout (%u)...\n",
2199 info->timeout_task);
2200 GNUNET_SCHEDULER_cancel(info->timeout_task);
2201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
2202 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
2205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing memory...\n");
2206 GNUNET_free (info->data);
2207 GNUNET_free (info->copies);
2209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2211 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2217 * Function called to notify a client about the socket
2218 * being ready to queue more data. "buf" will be
2219 * NULL and "size" zero if the socket was closed for
2220 * writing in the meantime.
2222 * @param cls closure (MeshDataDescriptor)
2223 * @param size number of bytes available in buf
2224 * @param buf where the callee should write the message
2225 * @return number of bytes written to buf
2228 send_core_path_ack (void *cls, size_t size, void *buf)
2230 struct MeshDataDescriptor *info = cls;
2231 struct GNUNET_MESH_PathACK *msg = buf;
2233 GNUNET_assert (NULL != info);
2236 info->peer->core_transmit[info->handler_n] = NULL;
2238 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2243 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2244 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2245 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2246 msg->tid = htonl (info->origin->tid);
2247 msg->peer_id = my_full_id;
2249 /* TODO add signature */
2251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2252 return sizeof (struct GNUNET_MESH_PathACK);
2256 /******************************************************************************/
2257 /******************** MESH NETWORK HANDLERS **************************/
2258 /******************************************************************************/
2262 * Core handler for path creation
2264 * @param cls closure
2265 * @param message message
2266 * @param peer peer identity this notification is about
2267 * @param atsi performance data
2268 * @param atsi_count number of records in 'atsi'
2270 * @return GNUNET_OK to keep the connection open,
2271 * GNUNET_SYSERR to close it (signal serious error)
2274 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2275 const struct GNUNET_MessageHeader *message,
2276 const struct GNUNET_ATS_Information *atsi,
2277 unsigned int atsi_count)
2279 unsigned int own_pos;
2282 MESH_TunnelNumber tid;
2283 struct GNUNET_MESH_ManipulatePath *msg;
2284 struct GNUNET_PeerIdentity *pi;
2285 GNUNET_HashCode hash;
2286 struct MeshPeerPath *path;
2287 struct MeshPeerInfo *dest_peer_info;
2288 struct MeshPeerInfo *orig_peer_info;
2289 struct MeshTunnel *t;
2291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2292 "MESH: Received a path create msg [%s]\n",
2293 GNUNET_i2s(&my_full_id));
2294 size = ntohs (message->size);
2295 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2297 GNUNET_break_op (0);
2301 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2302 if (size % sizeof (struct GNUNET_PeerIdentity))
2304 GNUNET_break_op (0);
2307 size /= sizeof (struct GNUNET_PeerIdentity);
2310 GNUNET_break_op (0);
2313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2314 "MESH: path has %u hops.\n",
2316 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2318 tid = ntohl (msg->tid);
2319 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2320 t = tunnel_get (pi, tid);
2321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2322 "MESH: path is for tunnel %s [%X].\n",
2327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2328 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2329 t->id.oid = GNUNET_PEER_intern (pi);
2331 t->local_tid = next_local_tid++;
2332 /* FIXME test if taken */
2333 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2334 t->tree = tree_new(t, t->id.oid);
2336 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2338 GNUNET_CONTAINER_multihashmap_put (
2342 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2348 tunnel_reset_timeout (t);
2349 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2351 GNUNET_CONTAINER_multihashmap_put (
2355 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2363 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2364 if (NULL == dest_peer_info)
2366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2367 "MESH: Creating PeerInfo for destination.\n");
2368 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2369 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2370 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2372 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2374 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2375 if (NULL == orig_peer_info)
2377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2378 "MESH: Creating PeerInfo for origin.\n");
2379 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2380 orig_peer_info->id = GNUNET_PEER_intern (pi);
2381 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2382 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2385 path = path_new (size);
2387 for (i = 0; i < size; i++)
2389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2390 "MESH: ... adding %s\n",
2391 GNUNET_i2s(&pi[i]));
2392 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2393 if (path->peers[i] == myid)
2396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2397 "MESH: Own position: %u\n", own_pos);
2400 /* cannot be self, must be 'not found' */
2401 /* create path: self not found in path through self */
2402 GNUNET_break_op (0);
2403 path_destroy (path);
2404 /* FIXME error. destroy tunnel? leave for timeout? */
2407 tunnel_add_path (t, path, own_pos);
2408 if (own_pos == size - 1)
2410 /* It is for us! Send ack. */
2411 struct GNUNET_MESH_TunnelNotification cmsg;
2412 struct MeshDataDescriptor *info;
2415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2416 "MESH: It's for us!\n");
2417 path_add_to_origin (orig_peer_info, path);
2418 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2419 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2421 &my_full_id.hashPubKey,
2422 peer_info_get(&my_full_id),
2423 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2424 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2425 info->origin = &t->id;
2426 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2427 GNUNET_assert (NULL != info->peer);
2428 j = peer_info_transmit_slot(info->peer);
2429 info->handler_n = j;
2430 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2431 info->peer->infos[j] = info;
2432 info->peer->core_transmit[j] =
2433 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2434 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2435 sizeof (struct GNUNET_MESH_PathACK),
2436 &send_core_path_ack, info);
2437 cmsg.header.size = htons(sizeof(cmsg));
2438 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2439 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2440 cmsg.tunnel_id = htonl(t->local_tid);
2441 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2445 struct MeshPeerPath *path2;
2447 /* It's for somebody else! Retransmit. */
2448 path2 = path_duplicate(path);
2449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2450 "MESH: Retransmitting.\n");
2451 path_add_to_peer(dest_peer_info, path);
2452 path = path_duplicate(path2);
2453 path_add_to_origin(orig_peer_info, path2);
2454 send_create_path(dest_peer_info, path, t);
2461 * Core handler for path destruction
2463 * @param cls closure
2464 * @param message message
2465 * @param peer peer identity this notification is about
2466 * @param atsi performance data
2467 * @param atsi_count number of records in 'atsi'
2469 * @return GNUNET_OK to keep the connection open,
2470 * GNUNET_SYSERR to close it (signal serious error)
2473 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2474 const struct GNUNET_MessageHeader *message,
2475 const struct GNUNET_ATS_Information *atsi,
2476 unsigned int atsi_count)
2478 struct GNUNET_MESH_ManipulatePath *msg;
2479 struct GNUNET_PeerIdentity *pi;
2480 struct MeshPeerPath *path;
2481 struct MeshTunnel *t;
2482 unsigned int own_pos;
2486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2487 "MESH: Received a PATH DESTROY msg from %s\n",
2489 size = ntohs (message->size);
2490 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2492 GNUNET_break_op (0);
2496 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2497 if (size % sizeof (struct GNUNET_PeerIdentity))
2499 GNUNET_break_op (0);
2502 size /= sizeof (struct GNUNET_PeerIdentity);
2505 GNUNET_break_op (0);
2508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2509 "MESH: path has %u hops.\n",
2512 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2513 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2515 "MESH: path is for tunnel %s [%X].\n",
2518 t = tunnel_get (pi, ntohl (msg->tid));
2521 /* TODO notify back: we don't know this tunnel */
2522 GNUNET_break_op (0);
2525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2526 path = path_new (size);
2528 for (i = 0; i < size; i++)
2530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2531 "MESH: ... adding %s\n",
2532 GNUNET_i2s(&pi[i]));
2533 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2534 if (path->peers[i] == myid)
2537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2538 "MESH: Own position: %u\n", own_pos);
2539 if (own_pos < path->length - 1)
2540 send_message (message, &pi[own_pos + 1]);
2541 tunnel_delete_peer (t, path->peers[path->length - 1]);
2547 * Core handler for tunnel destruction
2549 * @param cls closure
2550 * @param message message
2551 * @param peer peer identity this notification is about
2552 * @param atsi performance data
2553 * @param atsi_count number of records in 'atsi'
2555 * @return GNUNET_OK to keep the connection open,
2556 * GNUNET_SYSERR to close it (signal serious error)
2559 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2560 const struct GNUNET_MessageHeader *message,
2561 const struct GNUNET_ATS_Information *atsi,
2562 unsigned int atsi_count)
2564 struct GNUNET_MESH_TunnelDestroy *msg;
2565 struct MeshTunnel *t;
2567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2568 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2570 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2572 "MESH: for tunnel %s [%u]\n",
2573 GNUNET_i2s (&msg->oid),
2575 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2578 /* TODO notify back: we don't know this tunnel */
2579 GNUNET_break_op (0);
2582 if (t->id.oid == myid)
2584 GNUNET_break_op (0);
2587 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2589 /* Tunnel was incoming, notify clients */
2590 send_clients_tunnel_destroy (t);
2592 tunnel_send_destroy (t);
2599 * Core handler for mesh network traffic going from the origin to a peer
2601 * @param cls closure
2602 * @param peer peer identity this notification is about
2603 * @param message message
2604 * @param atsi performance data
2605 * @param atsi_count number of records in 'atsi'
2606 * @return GNUNET_OK to keep the connection open,
2607 * GNUNET_SYSERR to close it (signal serious error)
2610 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2611 const struct GNUNET_MessageHeader *message,
2612 const struct GNUNET_ATS_Information *atsi,
2613 unsigned int atsi_count)
2615 struct GNUNET_MESH_Unicast *msg;
2616 struct MeshTunnel *t;
2620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2621 "MESH: got a unicast packet from %s\n",
2623 size = ntohs (message->size);
2625 sizeof (struct GNUNET_MESH_Unicast) +
2626 sizeof (struct GNUNET_MessageHeader))
2631 msg = (struct GNUNET_MESH_Unicast *) message;
2632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2633 "MESH: of type %u\n",
2634 ntohs (msg[1].header.type));
2635 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2638 /* TODO notify back: we don't know this tunnel */
2639 GNUNET_break_op (0);
2642 tunnel_reset_timeout (t);
2643 pid = GNUNET_PEER_search(&msg->destination);
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2647 "MESH: it's for us! sending to clients...\n");
2648 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2652 "MESH: not for us, retransmitting...\n");
2653 send_message (message, path_get_first_hop(t->tree, pid));
2659 * Core handler for mesh network traffic going from the origin to all peers
2661 * @param cls closure
2662 * @param message message
2663 * @param peer peer identity this notification is about
2664 * @param atsi performance data
2665 * @param atsi_count number of records in 'atsi'
2666 * @return GNUNET_OK to keep the connection open,
2667 * GNUNET_SYSERR to close it (signal serious error)
2669 * TODO: Check who we got this from, to validate route.
2672 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2673 const struct GNUNET_MessageHeader *message,
2674 const struct GNUNET_ATS_Information *atsi,
2675 unsigned int atsi_count)
2677 struct GNUNET_MESH_Multicast *msg;
2678 struct MeshTunnel *t;
2681 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2682 "MESH: got a multicast packet from %s\n",
2684 size = ntohs (message->size);
2685 if (sizeof (struct GNUNET_MESH_Multicast) +
2686 sizeof (struct GNUNET_MessageHeader) > size)
2688 GNUNET_break_op (0);
2691 msg = (struct GNUNET_MESH_Multicast *) message;
2692 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2696 /* TODO notify that we dont know that tunnel */
2697 GNUNET_break_op (0);
2700 tunnel_reset_timeout (t);
2702 /* Transmit to locally interested clients */
2703 if (NULL != t->peers &&
2704 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2706 send_subscribed_clients (message, &msg[1].header);
2708 tunnel_send_multicast(t, message);
2714 * Core handler for mesh network traffic toward the owner of a tunnel
2716 * @param cls closure
2717 * @param message message
2718 * @param peer peer identity this notification is about
2719 * @param atsi performance data
2720 * @param atsi_count number of records in 'atsi'
2722 * @return GNUNET_OK to keep the connection open,
2723 * GNUNET_SYSERR to close it (signal serious error)
2726 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2727 const struct GNUNET_MessageHeader *message,
2728 const struct GNUNET_ATS_Information *atsi,
2729 unsigned int atsi_count)
2731 struct GNUNET_MESH_ToOrigin *msg;
2732 struct GNUNET_PeerIdentity id;
2733 struct MeshPeerInfo *peer_info;
2734 struct MeshTunnel *t;
2737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2738 "MESH: got a ToOrigin packet from %s\n",
2740 size = ntohs (message->size);
2741 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2742 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2744 GNUNET_break_op (0);
2747 msg = (struct GNUNET_MESH_ToOrigin *) message;
2748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2749 "MESH: of type %u\n",
2750 ntohs (msg[1].header.type));
2751 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2755 /* TODO notify that we dont know this tunnel (whom)? */
2756 GNUNET_break_op (0);
2760 if (t->id.oid == myid)
2763 struct GNUNET_MESH_ToOrigin *copy;
2765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2766 "MESH: it's for us! sending to clients...\n");
2767 if (NULL == t->client)
2769 /* got data packet for ownerless tunnel */
2770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2771 "MESH: no clients!\n");
2772 GNUNET_break_op (0);
2775 /* TODO signature verification */
2776 memcpy (cbuf, message, size);
2777 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2778 copy->tid = htonl (t->local_tid);
2779 GNUNET_SERVER_notification_context_unicast (nc,
2785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2786 "MESH: not for us, retransmitting...\n");
2788 peer_info = peer_info_get (&msg->oid);
2789 if (NULL == peer_info)
2791 /* unknown origin of tunnel */
2795 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2796 send_message (message, &id);
2803 * Core handler for path ACKs
2805 * @param cls closure
2806 * @param message message
2807 * @param peer peer identity this notification is about
2808 * @param atsi performance data
2809 * @param atsi_count number of records in 'atsi'
2811 * @return GNUNET_OK to keep the connection open,
2812 * GNUNET_SYSERR to close it (signal serious error)
2815 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2816 const struct GNUNET_MessageHeader *message,
2817 const struct GNUNET_ATS_Information *atsi,
2818 unsigned int atsi_count)
2820 struct GNUNET_MESH_PathACK *msg;
2821 struct GNUNET_PeerIdentity id;
2822 struct MeshTunnelTreeNode *n;
2823 struct MeshPeerInfo *peer_info;
2824 struct MeshTunnel *t;
2826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2827 "MESH: Received a path ACK msg [%s]\n",
2828 GNUNET_i2s(&my_full_id));
2829 msg = (struct GNUNET_MESH_PathACK *) message;
2830 t = tunnel_get (&msg->oid, msg->tid);
2833 /* TODO notify that we don't know the tunnel */
2837 /* Message for us? */
2838 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2840 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2841 if (NULL == t->client)
2843 GNUNET_break_op (0);
2846 peer_info = peer_info_get (&msg->peer_id);
2847 if (NULL == peer_info)
2849 GNUNET_break_op (0);
2852 n = tree_find_peer(t->tree->root, peer_info->id);
2855 GNUNET_break_op (0);
2858 n->status = MESH_PEER_READY;
2859 send_client_peer_connected(t, peer_info->id);
2863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2864 "MESH: not for us, retransmitting...\n");
2865 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2866 peer_info = peer_info_get (&msg->oid);
2867 if (NULL == peer_info)
2869 /* If we know the tunnel, we should DEFINITELY know the peer */
2873 send_message (message, &id);
2879 * Functions to handle messages from core
2881 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2882 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2883 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
2884 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
2885 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2886 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2887 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2888 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2889 sizeof (struct GNUNET_MESH_PathACK)},
2895 /******************************************************************************/
2896 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2897 /******************************************************************************/
2900 * deregister_app: iterator for removing each application registered by a client
2902 * @param cls closure
2903 * @param key the hash of the application id (used to access the hashmap)
2904 * @param value the value stored at the key (client)
2906 * @return GNUNET_OK on success
2909 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2911 GNUNET_break (GNUNET_YES ==
2912 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
2918 * notify_client_connection_failure: notify a client that the connection to the
2919 * requested remote peer is not possible (for instance, no route found)
2920 * Function called when the socket is ready to queue more data. "buf" will be
2921 * NULL and "size" zero if the socket was closed for writing in the meantime.
2923 * @param cls closure
2924 * @param size number of bytes available in buf
2925 * @param buf where the callee should write the message
2926 * @return number of bytes written to buf
2929 notify_client_connection_failure (void *cls, size_t size, void *buf)
2932 struct MeshPeerInfo *peer_info;
2933 struct GNUNET_MESH_PeerControl *msg;
2934 struct GNUNET_PeerIdentity id;
2936 if (0 == size && NULL == buf)
2938 // TODO retry? cancel?
2942 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2943 peer_info = (struct MeshPeerInfo *) cls;
2944 msg = (struct GNUNET_MESH_PeerControl *) buf;
2945 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2946 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2947 // msg->tunnel_id = htonl(peer_info->t->tid);
2948 GNUNET_PEER_resolve (peer_info->id, &id);
2949 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2957 * Send keepalive packets for a peer
2959 * @param cls Closure (tunnel for which to send the keepalive).
2960 * @param tc Notification context.
2962 * TODO: implement explicit multicast keepalive?
2965 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2967 struct MeshTunnel *t = cls;
2968 struct GNUNET_MessageHeader *payload;
2969 struct GNUNET_MESH_Multicast *msg;
2970 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
2971 sizeof(struct GNUNET_MessageHeader);
2974 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2978 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2981 "MESH: sending keepalive for tunnel %d\n",
2984 msg = (struct GNUNET_MESH_Multicast *) cbuf;
2985 msg->header.size = htons (size);
2986 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2987 msg->oid = my_full_id;
2988 msg->tid = htonl(t->id.tid);
2989 payload = (struct GNUNET_MessageHeader *) &msg[1];
2990 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2991 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
2992 tunnel_send_multicast (t, &msg->header);
2994 t->path_refresh_task =
2995 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3001 * Function to process paths received for a new peer addition. The recorded
3002 * paths form the initial tunnel, which can be optimized later.
3003 * Called on each result obtained for the DHT search.
3005 * @param cls closure
3006 * @param exp when will this value expire
3007 * @param key key of the result
3008 * @param type type of the result
3009 * @param size number of bytes in data
3010 * @param data pointer to the result data
3012 * TODO: re-issue the request after certain time? cancel after X results?
3015 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3016 const GNUNET_HashCode * key,
3017 const struct GNUNET_PeerIdentity *get_path,
3018 unsigned int get_path_length,
3019 const struct GNUNET_PeerIdentity *put_path,
3020 unsigned int put_path_length,
3021 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3023 struct MeshPathInfo *path_info = cls;
3024 struct MeshPeerPath *p;
3025 struct GNUNET_PeerIdentity pi;
3028 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3029 "MESH: Got results from DHT!\n");
3030 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3031 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3033 GNUNET_h2s_full(&pi.hashPubKey));
3034 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3035 // path_info->peer->dhtget = NULL;
3037 p = path_build_from_dht (get_path, get_path_length,
3038 put_path, put_path_length);
3039 path_add_to_peer (path_info->peer, p);
3040 for (i = 0; i < path_info->peer->ntunnels; i++)
3042 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3043 peer_info_connect(path_info->peer, path_info->t);
3045 GNUNET_free (path_info);
3052 * Function to process paths received for a new peer addition. The recorded
3053 * paths form the initial tunnel, which can be optimized later.
3054 * Called on each result obtained for the DHT search.
3056 * @param cls closure
3057 * @param exp when will this value expire
3058 * @param key key of the result
3059 * @param type type of the result
3060 * @param size number of bytes in data
3061 * @param data pointer to the result data
3064 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3065 const GNUNET_HashCode * key,
3066 const struct GNUNET_PeerIdentity *get_path,
3067 unsigned int get_path_length,
3068 const struct GNUNET_PeerIdentity *put_path,
3069 unsigned int put_path_length,
3070 enum GNUNET_BLOCK_Type type, size_t size,
3073 const struct GNUNET_PeerIdentity *pi = data;
3074 struct GNUNET_PeerIdentity id;
3075 struct MeshTunnel *t = cls;
3076 struct MeshPeerInfo *peer_info;
3077 struct MeshPeerPath *p;
3080 if (size != sizeof (struct GNUNET_PeerIdentity))
3082 GNUNET_break_op (0);
3085 GNUNET_assert (NULL != t->client);
3086 GNUNET_DHT_get_stop (t->dht_get_type);
3087 t->dht_get_type = NULL;
3088 peer_info = peer_info_get (pi);
3089 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
3090 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3092 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
3093 NULL == peer_info->dhtget)
3095 peer_info_connect (peer_info, t);
3099 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
3100 path_add_to_peer (peer_info, p);
3101 tunnel_add_peer(t, peer_info);
3102 p = tree_get_path_to_peer(t->tree, peer_info->id);
3104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3105 "MESH: new route for tunnel 0x%x found, has %u hops\n",
3106 t->local_tid, p->length);
3107 for (i = 0; i < p->length; i++)
3109 GNUNET_PEER_resolve (p->peers[0], &id);
3110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
3111 GNUNET_h2s_full (&id.hashPubKey));
3117 send_create_path(peer_info, p, t);
3121 send_client_peer_connected(t, myid);
3125 /******************************************************************************/
3126 /********************* MESH LOCAL HANDLES **************************/
3127 /******************************************************************************/
3131 * Handler for client disconnection
3133 * @param cls closure
3134 * @param client identification of the client; NULL
3135 * for the last call when the server is destroyed
3138 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3140 struct MeshClient *c;
3141 struct MeshClient *next;
3143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3149 if (c->handle != client && NULL != client)
3151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3156 if (NULL != c->tunnels)
3158 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3159 &tunnel_destroy_iterator,
3161 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3164 /* deregister clients applications */
3165 if (NULL != c->apps)
3167 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3168 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3170 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3171 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3173 GNUNET_SCHEDULER_cancel (announce_applications_task);
3174 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3176 if (NULL != c->types)
3177 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3178 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3190 * Handler for new clients
3192 * @param cls closure
3193 * @param client identification of the client
3194 * @param message the actual message, which includes messages the client wants
3197 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3198 const struct GNUNET_MessageHeader *message)
3200 struct GNUNET_MESH_ClientConnect *cc_msg;
3201 struct MeshClient *c;
3202 GNUNET_MESH_ApplicationType *a;
3209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3210 /* Check data sanity */
3211 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3212 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3213 ntypes = ntohs (cc_msg->types);
3214 napps = ntohs (cc_msg->applications);
3216 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3219 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3223 /* Create new client structure */
3224 c = GNUNET_malloc (sizeof (struct MeshClient));
3226 c->id = next_client_id++;
3229 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3232 GNUNET_MESH_ApplicationType at;
3235 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3236 for (i = 0; i < napps; i++)
3239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3240 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3241 /* store in clients hashmap */
3242 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3243 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3244 /* store in global hashmap, for announcements */
3245 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3246 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3248 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3249 announce_applications_task =
3250 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3258 t = (uint16_t *) & a[napps];
3259 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3260 for (i = 0; i < ntypes; i++)
3263 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3265 /* store in clients hashmap */
3266 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3267 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3268 /* store in global hashmap */
3269 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3270 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3274 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3276 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3277 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3278 GNUNET_SERVER_notification_context_add (nc, client);
3280 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3288 * Handler for requests of new tunnels
3290 * @param cls closure
3291 * @param client identification of the client
3292 * @param message the actual message
3295 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3296 const struct GNUNET_MessageHeader *message)
3298 struct GNUNET_MESH_TunnelMessage *t_msg;
3299 struct MeshTunnel *t;
3300 struct MeshClient *c;
3301 GNUNET_HashCode hash;
3303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3305 /* Sanity check for client registration */
3306 if (NULL == (c = client_get (client)))
3309 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3316 /* Message sanity check */
3317 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3320 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3324 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3325 /* Sanity check for tunnel numbering */
3326 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3329 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3332 /* Sanity check for duplicate tunnel IDs */
3333 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3336 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3340 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3341 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
3342 while (NULL != tunnel_get_by_pi (myid, next_tid))
3343 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3344 t->id.tid = next_tid++;
3346 t->local_tid = ntohl (t_msg->tunnel_id);
3348 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3350 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3352 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
3353 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3356 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3360 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3362 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3363 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3366 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3369 t->tree = tree_new (t, myid);
3370 t->tree->refresh = REFRESH_PATH_TIME;
3371 t->tree->root->status = MESH_PEER_READY;
3372 t->tree->me = t->tree->root;
3374 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3380 * Handler for requests of deleting tunnels
3382 * @param cls closure
3383 * @param client identification of the client
3384 * @param message the actual message
3387 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3388 const struct GNUNET_MessageHeader *message)
3390 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3391 struct MeshClient *c;
3392 struct MeshTunnel *t;
3393 MESH_TunnelNumber tid;
3394 GNUNET_HashCode hash;
3396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3397 "MESH: Got a DESTROY TUNNEL from client!\n");
3399 /* Sanity check for client registration */
3400 if (NULL == (c = client_get (client)))
3403 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3406 /* Message sanity check */
3407 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3410 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3416 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3418 /* Retrieve tunnel */
3419 tid = ntohl (tunnel_msg->tunnel_id);
3421 /* Remove from local id hashmap */
3422 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3423 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3424 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
3427 tunnel_send_destroy (t);
3429 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3435 * Handler for connection requests to new peers
3437 * @param cls closure
3438 * @param client identification of the client
3439 * @param message the actual message (PeerControl)
3442 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3443 const struct GNUNET_MessageHeader *message)
3445 struct GNUNET_MESH_PeerControl *peer_msg;
3446 struct MeshPeerInfo *peer_info;
3447 struct MeshClient *c;
3448 struct MeshTunnel *t;
3449 MESH_TunnelNumber tid;
3451 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3452 /* Sanity check for client registration */
3453 if (NULL == (c = client_get (client)))
3456 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3460 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3461 /* Sanity check for message size */
3462 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3465 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3469 /* Tunnel exists? */
3470 tid = ntohl (peer_msg->tunnel_id);
3471 t = tunnel_get_by_local_id (c, tid);
3475 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3479 /* Does client own tunnel? */
3480 if (t->client->handle != client)
3483 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3486 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3487 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
3488 peer_info = peer_info_get (&peer_msg->peer);
3490 tunnel_add_peer(t, peer_info);
3491 peer_info_connect(peer_info, t);
3493 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3499 * Handler for disconnection requests of peers in a tunnel
3501 * @param cls closure
3502 * @param client identification of the client
3503 * @param message the actual message (PeerControl)
3506 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3507 const struct GNUNET_MessageHeader *message)
3509 struct GNUNET_MESH_PeerControl *peer_msg;
3510 struct MeshPeerInfo *peer_info;
3511 struct MeshClient *c;
3512 struct MeshTunnel *t;
3513 MESH_TunnelNumber tid;
3515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3516 /* Sanity check for client registration */
3517 if (NULL == (c = client_get (client)))
3520 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3523 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3524 /* Sanity check for message size */
3525 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3528 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3532 /* Tunnel exists? */
3533 tid = ntohl (peer_msg->tunnel_id);
3534 t = tunnel_get_by_local_id (c, tid);
3538 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3543 /* Does client own tunnel? */
3544 if (t->client->handle != client)
3547 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3552 "MESH: for peer %s\n",
3553 GNUNET_i2s(&peer_msg->peer));
3554 /* Is the peer in the tunnel? */
3555 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3556 &peer_msg->peer.hashPubKey);
3557 if (NULL == peer_info)
3560 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3564 /* Ok, delete peer from tunnel */
3565 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3566 &peer_msg->peer.hashPubKey);
3568 send_destroy_path (t, peer_info->id);
3569 tunnel_delete_peer(t, peer_info->id);
3570 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3576 * Handler for connection requests to new peers by type
3578 * @param cls closure
3579 * @param client identification of the client
3580 * @param message the actual message (ConnectPeerByType)
3583 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3584 const struct GNUNET_MessageHeader *message)
3586 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3587 struct MeshClient *c;
3588 struct MeshTunnel *t;
3589 GNUNET_HashCode hash;
3590 MESH_TunnelNumber tid;
3592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3593 /* Sanity check for client registration */
3594 if (NULL == (c = client_get (client)))
3597 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3601 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3602 /* Sanity check for message size */
3603 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3604 ntohs (connect_msg->header.size))
3607 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3611 /* Tunnel exists? */
3612 tid = ntohl (connect_msg->tunnel_id);
3613 t = tunnel_get_by_local_id (c, tid);
3617 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3621 /* Does client own tunnel? */
3622 if (t->client->handle != client)
3625 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3629 /* Do WE have the service? */
3630 t->type = ntohl (connect_msg->type);
3631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3632 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3633 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3636 /* Yes! Fast forward, add ourselves to the tunnel and send the
3637 * good news to the client
3639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3640 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3641 peer_info_get (&my_full_id),
3642 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3645 send_client_peer_connected(t, myid);
3646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3647 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3650 /* Ok, lets find a peer offering the service */
3651 if (NULL != t->dht_get_type)
3653 GNUNET_DHT_get_stop (t->dht_get_type);
3655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3656 GNUNET_h2s_full (&hash));
3658 GNUNET_DHT_get_start (dht_handle,
3659 GNUNET_TIME_UNIT_FOREVER_REL,
3660 GNUNET_BLOCK_TYPE_TEST,
3663 GNUNET_DHT_RO_RECORD_ROUTE |
3664 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3666 &dht_get_type_handler, t);
3668 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3674 * Handler for client traffic directed to one peer
3676 * @param cls closure
3677 * @param client identification of the client
3678 * @param message the actual message
3681 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3682 const struct GNUNET_MessageHeader *message)
3684 struct MeshClient *c;
3685 struct MeshTunnel *t;
3686 struct MeshPeerInfo *pi;
3687 struct GNUNET_MESH_Unicast *data_msg;
3688 MESH_TunnelNumber tid;
3691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3692 "MESH: Got a unicast request from a client!\n");
3694 /* Sanity check for client registration */
3695 if (NULL == (c = client_get (client)))
3698 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3701 data_msg = (struct GNUNET_MESH_Unicast *) message;
3702 /* Sanity check for message size */
3703 size = ntohs (message->size);
3704 if (sizeof (struct GNUNET_MESH_Unicast) +
3705 sizeof (struct GNUNET_MessageHeader) > size)
3708 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3712 /* Tunnel exists? */
3713 tid = ntohl (data_msg->tid);
3714 t = tunnel_get_by_local_id (c, tid);
3718 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3722 /* Is it a local tunnel? Then, does client own the tunnel? */
3723 if (NULL != t->client &&
3724 NULL != t->client->handle &&
3725 t->client->handle != client)
3728 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3732 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3733 &data_msg->destination.hashPubKey);
3734 /* Is the selected peer in the tunnel? */
3738 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3742 /* Ok, everything is correct, send the message
3743 * (pretend we got it from a mesh peer)
3746 char buf[ntohs (message->size)];
3747 struct GNUNET_MESH_Unicast *copy;
3749 /* Work around const limitation */
3750 copy = (struct GNUNET_MESH_Unicast *) buf;
3751 memcpy (buf, data_msg, size);
3752 copy->oid = my_full_id;
3753 copy->tid = htonl (t->id.tid);
3754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3755 "MESH: calling generic handler...\n");
3756 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3758 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3764 * Handler for client traffic directed to the origin
3766 * @param cls closure
3767 * @param client identification of the client
3768 * @param message the actual message
3771 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3772 const struct GNUNET_MessageHeader *message)
3774 struct GNUNET_MESH_ToOrigin *data_msg;
3775 struct GNUNET_PeerIdentity id;
3776 struct MeshClient *c;
3777 struct MeshTunnel *t;
3778 MESH_TunnelNumber tid;
3781 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3782 "MESH: Got a ToOrigin request from a client!\n");
3784 /* Sanity check for client registration */
3785 if (NULL == (c = client_get (client)))
3788 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3791 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3792 /* Sanity check for message size */
3793 size = ntohs (message->size);
3794 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3795 sizeof (struct GNUNET_MessageHeader) > size)
3798 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3802 /* Tunnel exists? */
3803 tid = ntohl (data_msg->tid);
3804 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3807 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3810 t = tunnel_get_by_local_id (c, tid);
3814 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3818 /* It shouldn't be a local tunnel. */
3819 if (NULL != t->client)
3822 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3825 GNUNET_PEER_resolve(t->id.oid, &id);
3827 /* Ok, everything is correct, send the message
3828 * (pretend we got it from a mesh peer)
3831 char buf[ntohs (message->size)];
3832 struct GNUNET_MESH_ToOrigin *copy;
3834 /* Work around const limitation */
3835 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3836 memcpy (buf, data_msg, size);
3838 copy->tid = htonl (t->id.tid);
3839 copy->sender = my_full_id;
3840 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3841 "MESH: calling generic handler...\n");
3842 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3844 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3850 * Handler for client traffic directed to all peers in a tunnel
3852 * @param cls closure
3853 * @param client identification of the client
3854 * @param message the actual message
3857 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3858 const struct GNUNET_MessageHeader *message)
3860 struct MeshClient *c;
3861 struct MeshTunnel *t;
3862 struct GNUNET_MESH_Multicast *data_msg;
3863 MESH_TunnelNumber tid;
3865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3866 "MESH: Got a multicast request from a client!\n");
3868 /* Sanity check for client registration */
3869 if (NULL == (c = client_get (client)))
3872 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3875 data_msg = (struct GNUNET_MESH_Multicast *) message;
3876 /* Sanity check for message size */
3877 if (sizeof (struct GNUNET_MESH_Multicast) +
3878 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
3881 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3885 /* Tunnel exists? */
3886 tid = ntohl (data_msg->tid);
3887 t = tunnel_get_by_local_id (c, tid);
3891 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3895 /* Does client own tunnel? */
3896 if (t->client->handle != client)
3899 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3904 char buf[ntohs(message->size)];
3905 struct GNUNET_MESH_Multicast *copy;
3907 copy = (struct GNUNET_MESH_Multicast *)buf;
3908 memcpy(buf, message, ntohs(message->size));
3909 copy->oid = my_full_id;
3910 copy->tid = htonl(t->id.tid);
3911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3912 "MESH: calling generic handler...\n");
3913 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
3916 /* receive done gets called when last copy is sent to a neighbor */
3921 * Functions to handle messages from clients
3923 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3924 {&handle_local_new_client, NULL,
3925 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3926 {&handle_local_tunnel_create, NULL,
3927 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3928 sizeof (struct GNUNET_MESH_TunnelMessage)},
3929 {&handle_local_tunnel_destroy, NULL,
3930 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3931 sizeof (struct GNUNET_MESH_TunnelMessage)},
3932 {&handle_local_connect_add, NULL,
3933 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3934 sizeof (struct GNUNET_MESH_PeerControl)},
3935 {&handle_local_connect_del, NULL,
3936 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3937 sizeof (struct GNUNET_MESH_PeerControl)},
3938 {&handle_local_connect_by_type, NULL,
3939 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3940 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3941 {&handle_local_unicast, NULL,
3942 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3943 {&handle_local_to_origin, NULL,
3944 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3945 {&handle_local_multicast, NULL,
3946 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3952 * To be called on core init/fail.
3954 * @param cls service closure
3955 * @param server handle to the server for this service
3956 * @param identity the public identity of this peer
3959 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3960 const struct GNUNET_PeerIdentity *identity)
3962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3963 core_handle = server;
3964 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3966 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3967 GNUNET_SCHEDULER_shutdown();
3973 * Method called whenever a given peer connects.
3975 * @param cls closure
3976 * @param peer peer identity this notification is about
3977 * @param atsi performance data for the connection
3978 * @param atsi_count number of records in 'atsi'
3981 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3982 const struct GNUNET_ATS_Information *atsi,
3983 unsigned int atsi_count)
3985 struct MeshPeerInfo *peer_info;
3986 struct MeshPeerPath *path;
3988 #if MESH_DEBUG_CONNECTION
3989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3991 GNUNET_h2s(&my_full_id.hashPubKey));
3993 peer_info = peer_info_get (peer);
3994 if (myid == peer_info->id)
3996 #if MESH_DEBUG_CONNECTION
3997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4001 #if MESH_DEBUG_CONNECTION
4004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4005 GNUNET_h2s(&peer->hashPubKey));
4008 path = path_new (2);
4009 path->peers[0] = myid;
4010 path->peers[1] = peer_info->id;
4011 GNUNET_PEER_change_rc(myid, 1);
4012 GNUNET_PEER_change_rc(peer_info->id, 1);
4013 path_add_to_peer (peer_info, path);
4018 * Method called whenever a peer disconnects.
4020 * @param cls closure
4021 * @param peer peer identity this notification is about
4024 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4026 struct MeshPeerInfo *pi;
4029 #if MESH_DEBUG_CONNECTION
4030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4032 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4038 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4040 peer_info_cancel_transmission(pi, i);
4042 path_remove_from_peer (pi, pi->id, myid);
4043 #if MESH_DEBUG_CONNECTION
4046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4053 /******************************************************************************/
4054 /************************ MAIN FUNCTIONS ****************************/
4055 /******************************************************************************/
4058 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4060 * @param cls closure
4061 * @param key current key code
4062 * @param value value in the hash map
4063 * @return GNUNET_YES if we should continue to iterate,
4067 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4069 struct MeshTunnel *t = value;
4075 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4077 * @param cls closure
4078 * @param key current key code
4079 * @param value value in the hash map
4080 * @return GNUNET_YES if we should continue to iterate,
4084 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4086 struct MeshPeerInfo *p = value;
4087 peer_info_destroy(p);
4092 * Task run during shutdown.
4098 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4100 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4101 /* TODO: destroy tunnels? */
4102 if (core_handle != NULL)
4104 GNUNET_CORE_disconnect (core_handle);
4107 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4108 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4109 if (dht_handle != NULL)
4111 GNUNET_DHT_disconnect (dht_handle);
4116 GNUNET_SERVER_notification_context_destroy (nc);
4119 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4121 GNUNET_SCHEDULER_cancel (announce_id_task);
4122 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4128 * Process mesh requests.
4130 * @param cls closure
4131 * @param server the initialized server
4132 * @param c configuration to use
4135 run (void *cls, struct GNUNET_SERVER_Handle *server,
4136 const struct GNUNET_CONFIGURATION_Handle *c)
4138 struct MeshPeerInfo *peer;
4139 struct MeshPeerPath *p;
4142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4143 server_handle = server;
4144 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4145 CORE_QUEUE_SIZE, /* queue size */
4146 NULL, /* Closure passed to MESH functions */
4147 &core_init, /* Call core_init once connected */
4148 &core_connect, /* Handle connects */
4149 &core_disconnect, /* remove peers on disconnects */
4150 NULL, /* Don't notify about all incoming messages */
4151 GNUNET_NO, /* For header only in notification */
4152 NULL, /* Don't notify about all outbound messages */
4153 GNUNET_NO, /* For header-only out notification */
4154 core_handlers); /* Register these handlers */
4155 if (core_handle == NULL)
4158 GNUNET_SCHEDULER_shutdown ();
4163 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4166 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4168 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4169 GNUNET_SCHEDULER_shutdown ();
4172 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4173 GNUNET_free (keyfile);
4174 if (my_private_key == NULL)
4176 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4177 _("Mesh service could not access hostkey. Exiting.\n"));
4178 GNUNET_SCHEDULER_shutdown ();
4181 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4182 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4183 &my_full_id.hashPubKey);
4184 myid = GNUNET_PEER_intern (&my_full_id);
4186 dht_handle = GNUNET_DHT_connect (c, 64);
4187 if (dht_handle == NULL)
4193 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4195 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4196 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4197 peers = GNUNET_CONTAINER_multihashmap_create (32);
4198 applications = GNUNET_CONTAINER_multihashmap_create (32);
4199 types = GNUNET_CONTAINER_multihashmap_create (32);
4201 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4202 nc = GNUNET_SERVER_notification_context_create (server_handle,
4204 GNUNET_SERVER_disconnect_notify (server_handle,
4205 &handle_local_client_disconnect,
4210 clients_tail = NULL;
4215 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4216 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4218 /* Create a peer_info for the local peer */
4219 peer = peer_info_get(&my_full_id);
4222 path_add_to_peer(peer, p);
4224 /* Scheduled the task to clean up when shutdown is called */
4225 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4232 * The main function for the mesh service.
4234 * @param argc number of arguments from the command line
4235 * @param argv command line arguments
4236 * @return 0 ok, 1 on error
4239 main (int argc, char *const *argv)
4243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4246 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");