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_assert (GNUENT_YES ==
1288 GNUNET_CONTAINER_multihashmap_remove (peers, &hash, pi));
1289 if (NULL != pi->dhtget)
1291 GNUNET_DHT_get_stop(pi->dhtget);
1292 GNUNET_free (pi->dhtgetcls);
1294 for (i = 0; i < CORE_QUEUE_SIZE; i++)
1296 peer_info_cancel_transmission(pi, i);
1302 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1312 * Notify a tunnel that a connection has broken that affects at least
1313 * some of its peers.
1315 * @param t Tunnel affected.
1316 * @param peer Peer that (at least) has been affected by the disconnection.
1317 * @param p1 Peer that got disconnected from p2.
1318 * @param p2 Peer that got disconnected from p1.
1320 * @return Short ID of the peer disconnected (either p1 or p2).
1321 * 0 if the tunnel remained unaffected.
1323 static GNUNET_PEER_Id
1324 tunnel_notify_connection_broken (struct MeshTunnel *t,
1325 struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1330 * Remove all paths that rely on a direct connection between p1 and p2
1331 * from the peer itself and notify all tunnels about it.
1333 * @param peer PeerInfo of affected peer.
1334 * @param p1 GNUNET_PEER_Id of one peer.
1335 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1338 * TODO: optimize (see below)
1341 path_remove_from_peer (struct MeshPeerInfo *peer,
1345 struct MeshPeerPath *p;
1346 struct MeshPeerPath *aux;
1347 struct MeshPeerInfo *peer_d;
1349 unsigned int destroyed;
1355 p = peer->path_head;
1359 for (i = 0; i < (p->length - 1); i++)
1361 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1362 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1364 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1375 for (i = 0; i < peer->ntunnels; i++)
1377 d = tunnel_notify_connection_broken (peer->tunnels[i], peer, p1, p2);
1379 * Problem: one or more peers have been deleted from the tunnel tree.
1380 * We don't know who they are to try to add them again.
1381 * We need to try to find a new path for each of the disconnected peers.
1382 * Some of them might already have a path to reach them that does not
1383 * involve p1 and p2. Adding all anew might render in a better tree than
1384 * the trivial immediate fix.
1386 * Trivial immiediate fix: try to reconnect to the disconnected node. All
1387 * its children will be reachable trough him.
1389 peer_d = peer_info_get_short(d);
1392 for (p = peer_d->path_head; NULL != p; p = p->next)
1394 if ((cost = path_get_cost(peer->tunnels[i]->tree, p)) < best)
1402 /* No callback, as peer will be already disconnected */
1403 tree_add_path(peer->tunnels[i]->tree, aux, NULL);
1407 peer_info_connect (peer_d, peer->tunnels[i]);
1414 * Add the path to the peer and update the path used to reach it in case this
1417 * @param peer_info Destination peer to add the path to.
1418 * @param path New path to add. Last peer must be the peer in arg 1.
1419 * Path will be either used of freed if already known.
1421 * TODO: trim the part from origin to us? Add it as path to origin?
1424 path_add_to_peer (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1426 struct MeshPeerPath *aux;
1430 if (NULL == peer_info || NULL == path)
1436 l = path_get_length (path);
1443 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1445 l2 = path_get_length (aux);
1448 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1449 peer_info->path_tail, aux, path);
1453 if (l2 == l && memcmp(path->peers, aux->peers, l) == 0)
1460 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1467 * Add the path to the origin peer and update the path used to reach it in case
1468 * this is the shortest.
1469 * The path is given in peer_info -> destination, therefore we turn the path
1470 * upside down first.
1472 * @param peer_info Peer to add the path to, being the origin of the path.
1473 * @param path New path to add after being inversed.
1476 path_add_to_origin (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path)
1479 path_add_to_peer (peer_info, path);
1484 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1485 * to obtain a local peer -> destination path and interning the peer ids.
1487 * @return Newly allocated and created path
1489 static struct MeshPeerPath *
1490 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1491 unsigned int get_path_length,
1492 const struct GNUNET_PeerIdentity *put_path,
1493 unsigned int put_path_length)
1495 struct MeshPeerPath *p;
1501 GNUNET_PEER_change_rc(myid, 1);
1502 i = get_path_length;
1503 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: GET has %d hops.\n", i);
1504 for (i--; i >= 0; i--)
1506 id = GNUNET_PEER_intern (&get_path[i]);
1507 if (p->length > 0 && id == p->peers[p->length - 1])
1509 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1510 GNUNET_PEER_change_rc(id, -1);
1514 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1515 "MESH: Adding from GET: %s.\n",
1516 GNUNET_i2s(&get_path[i]));
1518 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1519 p->peers[p->length - 1] = id;
1522 i = put_path_length;
1523 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: PUT has %d hops.\n", i);
1524 for (i--; i >= 0; i--)
1526 id = GNUNET_PEER_intern (&put_path[i]);
1529 /* PUT path went through us, so discard the path up until now and start
1530 * from here to get a much shorter (and loop-free) path.
1535 if (p->length > 0 && id == p->peers[p->length - 1])
1537 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Optimizing 1 hop out.\n");
1538 GNUNET_PEER_change_rc(id, -1);
1542 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
1543 "MESH: Adding from PUT: %s.\n",
1544 GNUNET_i2s(&put_path[i]));
1546 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1547 p->peers[p->length - 1] = id;
1551 if (get_path_length > 0)
1552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1553 "MESH: (first of GET: %s)\n",
1554 GNUNET_h2s_full(&get_path[0].hashPubKey));
1555 if (put_path_length > 0)
1556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1557 "MESH: (first of PUT: %s)\n",
1558 GNUNET_h2s_full(&put_path[0].hashPubKey));
1559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1560 "MESH: In total: %d hops\n",
1562 for (i = 0; i < p->length; i++)
1564 struct GNUNET_PeerIdentity peer_id;
1566 GNUNET_PEER_resolve(p->peers[i], &peer_id);
1567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1570 GNUNET_h2s_full(&peer_id.hashPubKey));
1578 * Send keepalive packets for a peer
1580 * @param cls Closure (tunnel for which to send the keepalive).
1581 * @param tc Notification context.
1583 * TODO: implement explicit multicast keepalive?
1586 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1590 * Search for a tunnel among the tunnels for a client
1592 * @param c the client whose tunnels to search in
1593 * @param tid the local id of the tunnel
1595 * @return tunnel handler, NULL if doesn't exist
1597 static struct MeshTunnel *
1598 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1600 GNUNET_HashCode hash;
1602 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
1603 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1605 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1607 return GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
1612 * Search for a tunnel by global ID using PEER_ID
1614 * @param pi owner of the tunnel
1615 * @param tid global tunnel number
1617 * @return tunnel handler, NULL if doesn't exist
1619 static struct MeshTunnel *
1620 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1622 struct MESH_TunnelID id;
1623 GNUNET_HashCode hash;
1628 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1629 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1634 * Search for a tunnel by global ID using full PeerIdentities
1636 * @param oid owner of the tunnel
1637 * @param tid global tunnel number
1639 * @return tunnel handler, NULL if doesn't exist
1641 static struct MeshTunnel *
1642 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1644 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1649 * Callback used to notify a client owner of a tunnel that a peer has
1650 * disconnected, most likely because of a path change.
1652 * @param n Node in the tree representing the disconnected peer
1655 notify_peer_disconnected (const struct MeshTunnelTreeNode *n)
1657 struct MeshPeerInfo *peer;
1659 if (NULL != n->t->client && NULL != nc)
1661 struct GNUNET_MESH_PeerControl msg;
1662 msg.header.size = htons (sizeof (msg));
1663 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
1664 msg.tunnel_id = htonl (n->t->local_tid);
1665 GNUNET_PEER_resolve (n->peer, &msg.peer);
1666 GNUNET_SERVER_notification_context_unicast (nc, n->t->client->handle,
1667 &msg.header, GNUNET_NO);
1669 peer = peer_info_get_short(n->peer);
1670 peer_info_connect(peer, n->t);
1675 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1676 * needed rescources.
1677 * If peer already exists, reevaluate shortest path and change if different.
1679 * @param t Tunnel we want to add a new peer to
1680 * @param peer PeerInfo of the peer being added
1684 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
1686 struct GNUNET_PeerIdentity id;
1687 struct MeshPeerPath *best_p;
1688 struct MeshPeerPath *p;
1689 unsigned int best_cost;
1692 GNUNET_PEER_resolve(peer->id, &id);
1694 GNUNET_CONTAINER_multihashmap_contains(t->peers, &id.hashPubKey))
1697 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
1698 GNUNET_CONTAINER_multihashmap_put(
1702 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1705 if (NULL != (p = peer->path_head))
1708 best_cost = path_get_cost(t->tree, p);
1711 if ((cost = path_get_cost (t->tree, p)) < best_cost)
1718 tree_add_path (t->tree, best_p, ¬ify_peer_disconnected);
1719 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
1720 t->path_refresh_task =
1721 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
1725 /* Start a DHT get if necessary */
1726 peer_info_connect(peer, t);
1731 * Add a path to a tunnel which we don't own, just to remember the next hop.
1732 * If destination node was already in the tunnel, the first hop information
1733 * will be replaced with the new path.
1735 * @param t Tunnel we want to add a new peer to
1736 * @param p Path to add
1737 * @param own_pos Position of local node in path.
1741 tunnel_add_path (struct MeshTunnel *t,
1742 struct MeshPeerPath *p,
1743 unsigned int own_pos)
1745 struct GNUNET_PeerIdentity id;
1747 GNUNET_assert (0 != own_pos);
1748 tree_add_path(t->tree, p, NULL);
1749 if (NULL == t->tree->me)
1750 t->tree->me = tree_find_peer(t->tree->root, p->peers[own_pos]);
1751 if (own_pos < p->length - 1)
1753 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
1754 tree_update_first_hops(t->tree, t->tree->me, &id);
1760 * Notify a tunnel that a connection has broken that affects at least
1761 * some of its peers.
1763 * @param t Tunnel affected.
1764 * @param peer Peer that (at least) has been affected by the disconnection.
1765 * @param p1 Peer that got disconnected from p2.
1766 * @param p2 Peer that got disconnected from p1.
1768 * @return Short ID of the peer disconnected (either p1 or p2).
1769 * 0 if the tunnel remained unaffected.
1771 static GNUNET_PEER_Id
1772 tunnel_notify_connection_broken (struct MeshTunnel *t,
1773 struct MeshPeerInfo *peer,
1777 return tree_notify_connection_broken (t->tree, p1, p2,
1778 ¬ify_peer_disconnected);
1783 * Send a message in a tunnel in multicast, sending a copy to each child node
1784 * down the local one in the tunnel tree.
1786 * @param t Tunnel in which to send the data.
1787 * @param msg Message to be sent
1789 * @return Number of copies sent.
1792 tunnel_send_multicast (struct MeshTunnel *t,
1793 const struct GNUNET_MessageHeader *msg)
1795 struct GNUNET_PeerIdentity neighbor;
1796 struct MeshDataDescriptor *info;
1797 struct MeshTunnelTreeNode *n;
1798 unsigned int *copies;
1803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1804 "MESH: sending a multicast packet...\n");
1805 size = ntohs (msg->size);
1806 GNUNET_assert (NULL != t->tree->me);
1807 n = t->tree->me->children_head;
1810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1811 "MESH: no children in the tree, no one to send.\n");
1814 copies = GNUNET_malloc (sizeof (unsigned int));
1815 for (*copies = 0; NULL != n; n = n->next)
1817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (%u copies)\n", *copies);
1818 n = t->tree->me->children_head;
1819 data = GNUNET_malloc (size);
1820 memcpy (data, msg, size);
1823 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
1826 info->copies = copies;
1827 if (NULL != t->client)
1829 info->client = t->client->handle;
1830 info->timeout_task = GNUNET_SCHEDULER_add_delayed (UNACKNOWLEDGED_WAIT,
1834 info->destination = n->peer;
1835 GNUNET_PEER_resolve (n->peer, &neighbor);
1836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1837 "MESH: sending to %s...\n",
1838 GNUNET_i2s (&neighbor));
1839 info->peer = peer_info_get(&neighbor);
1840 GNUNET_assert (NULL != info->peer);
1841 i = peer_info_transmit_slot(info->peer);
1842 info->handler_n = i;
1843 info->peer->infos[i] = info;
1844 info->peer->types[i] = GNUNET_MESSAGE_TYPE_MESH_MULTICAST;
1845 info->peer->core_transmit[i] =
1846 GNUNET_CORE_notify_transmit_ready (core_handle,
1849 GNUNET_TIME_UNIT_FOREVER_REL,
1852 &send_core_data_multicast, info);
1860 * Send a message to all peers in this tunnel that the tunnel is no longer
1863 * @param t The tunnel whose peers to notify.
1866 tunnel_send_destroy (struct MeshTunnel *t)
1868 struct GNUNET_MESH_TunnelDestroy msg;
1870 msg.header.size = htons (sizeof (msg));
1871 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
1872 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1873 msg.tid = htonl (t->id.tid);
1874 tunnel_send_multicast (t, &msg.header);
1880 * Destroy the tunnel and free any allocated resources linked to it
1882 * @param t the tunnel to destroy
1884 * @return GNUNET_OK on success
1887 tunnel_destroy (struct MeshTunnel *t)
1889 struct MeshClient *c;
1890 struct MeshQueue *q;
1891 struct MeshQueue *qn;
1892 GNUNET_HashCode hash;
1901 struct GNUNET_PeerIdentity id;
1903 GNUNET_PEER_resolve(t->id.oid, &id);
1904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1905 "MESH: destroying tunnel %s [%x]\n",
1909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
1913 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
1914 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
1919 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1921 GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t))
1925 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1927 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1928 GNUNET_break (GNUNET_YES ==
1929 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t));
1932 if (NULL != t->peers)
1934 GNUNET_CONTAINER_multihashmap_iterate(t->peers,
1935 &peer_info_delete_tunnel, t);
1936 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
1941 if (NULL != q->data)
1942 GNUNET_free (q->data);
1946 /* TODO cancel core transmit ready in case it was active */
1948 tree_destroy(t->tree);
1949 if (NULL != t->dht_get_type)
1950 GNUNET_DHT_get_stop(t->dht_get_type);
1951 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
1952 GNUNET_SCHEDULER_cancel(t->timeout_task);
1953 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
1954 GNUNET_SCHEDULER_cancel(t->path_refresh_task);
1961 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1962 * that are no longer needed, as well as nodes of no longer reachable peers.
1963 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1965 * @param t Tunnel from which to remove the path.
1966 * @param p Peer which should be removed.
1969 tunnel_delete_peer (struct MeshTunnel *t,
1970 GNUNET_PEER_Id peer)
1972 GNUNET_break (GNUNET_OK == tree_del_peer (t->tree, peer, NULL));
1973 if (NULL == t->tree->root)
1979 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
1980 * client when the client disconnects.
1982 * @param cls closure (client that is disconnecting)
1983 * @param key the hash of the local tunnel id (used to access the hashmap)
1984 * @param value the value stored at the key (tunnel to destroy)
1986 * @return GNUNET_OK on success
1989 tunnel_destroy_iterator (void *cls, const GNUNET_HashCode * key, void *value)
1991 struct MeshTunnel *t = value;
1994 if (NULL != t->dht_get_type)
1996 GNUNET_DHT_get_stop (t->dht_get_type);
1998 r = tunnel_destroy (t);
2004 * Timeout function, destroys tunnel if called
2006 * @param cls Closure (tunnel to destroy).
2007 * @param tc TaskContext
2010 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2012 struct MeshTunnel *t = cls;
2014 if (GNUNET_SCHEDULER_REASON_SHUTDOWN == tc->reason)
2016 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
2021 * Resets the tunnel timeout. Starts it if no timeout was running.
2023 * @param t Tunnel whose timeout to reset.
2026 tunnel_reset_timeout (struct MeshTunnel *t)
2028 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2029 GNUNET_SCHEDULER_cancel (t->timeout_task);
2030 t->timeout_task = GNUNET_SCHEDULER_add_delayed (
2031 GNUNET_TIME_relative_multiply(REFRESH_PATH_TIME, 4),
2037 /******************************************************************************/
2038 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2039 /******************************************************************************/
2042 * Function called to notify a client about the socket
2043 * being ready to queue more data. "buf" will be
2044 * NULL and "size" zero if the socket was closed for
2045 * writing in the meantime.
2047 * @param cls closure
2048 * @param size number of bytes available in buf
2049 * @param buf where the callee should write the message
2050 * @return number of bytes written to buf
2053 send_core_create_path (void *cls, size_t size, void *buf)
2055 struct MeshPathInfo *info = cls;
2056 struct GNUNET_MESH_ManipulatePath *msg;
2057 struct GNUNET_PeerIdentity *peer_ptr;
2058 struct MeshPeerInfo *peer = info->peer;
2059 struct MeshTunnel *t = info->t;
2060 struct MeshPeerPath *p = info->path;
2064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2065 "MESH: CREATE PATH sending...\n");
2067 sizeof (struct GNUNET_MESH_ManipulatePath) +
2068 p->length * sizeof (struct GNUNET_PeerIdentity);
2070 if (size < size_needed || NULL == buf)
2072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: create path retransmit!\n");
2073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: buf: %p\n", buf);
2074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: size: (%u/%u)\n",
2076 info->peer->core_transmit[info->pos] =
2077 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 0,
2078 GNUNET_TIME_UNIT_FOREVER_REL,
2079 path_get_first_hop (t->tree, peer->id),
2081 &send_core_create_path,
2085 info->peer->core_transmit[info->pos] = NULL;
2088 struct GNUNET_PeerIdentity id;
2090 GNUNET_PEER_resolve (peer->id, &id);
2091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2092 "MESH: setting core_transmit %s [%u] to NULL\n",
2097 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2098 msg->header.size = htons (size_needed);
2099 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2100 msg->tid = ntohl (t->id.tid);
2102 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2103 for (i = 0; i < p->length; i++)
2105 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2112 "MESH: CREATE PATH (%u bytes long) sent!\n",
2119 * Function called to notify a client about the socket
2120 * being ready to queue more data. "buf" will be
2121 * NULL and "size" zero if the socket was closed for
2122 * writing in the meantime.
2124 * @param cls closure (data itself)
2125 * @param size number of bytes available in buf
2126 * @param buf where the callee should write the message
2128 * @return number of bytes written to buf
2131 send_core_data_multicast (void *cls, size_t size, void *buf)
2133 struct MeshDataDescriptor *info = cls;
2136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Multicast callback.\n");
2137 GNUNET_assert (NULL != info);
2138 GNUNET_assert (NULL != info->peer);
2139 total_size = info->size;
2140 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
2142 if (total_size > size)
2145 struct GNUNET_PeerIdentity id;
2147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2148 "MESH: Multicast: retransmitting... (%u/%u)\n",
2150 GNUNET_PEER_resolve(info->peer->id, &id);
2151 info->peer->core_transmit[info->handler_n] =
2152 GNUNET_CORE_notify_transmit_ready (core_handle,
2155 GNUNET_TIME_UNIT_FOREVER_REL,
2158 &send_core_data_multicast,
2162 info->peer->core_transmit[info->handler_n] = NULL;
2163 info->peer->infos[info->handler_n] = NULL;
2164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: copying data...\n");
2165 memcpy (buf, info->data, total_size);
2168 struct GNUNET_MESH_Multicast *mc;
2169 struct GNUNET_MessageHeader *mh;
2172 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
2174 mc = (struct GNUNET_MESH_Multicast *) mh;
2175 mh = (struct GNUNET_MessageHeader *) &mc[1];
2176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2177 "MESH: multicast, payload type %u\n",
2179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2180 "MESH: multicast, payload size %u\n",
2185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2191 if (0 == --(*info->copies))
2193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Last copy!\n");
2194 if (NULL != info->client)
2196 if (GNUNET_SCHEDULER_NO_TASK != info->timeout_task)
2198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2199 "MESH: cancelling client timeout (%u)...\n",
2200 info->timeout_task);
2201 GNUNET_SCHEDULER_cancel(info->timeout_task);
2202 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client...\n");
2203 GNUNET_SERVER_receive_done (info->client, GNUNET_OK);
2206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing memory...\n");
2207 GNUNET_free (info->data);
2208 GNUNET_free (info->copies);
2210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: freeing info...\n");
2212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: return %u\n", total_size);
2218 * Function called to notify a client about the socket
2219 * being ready to queue more data. "buf" will be
2220 * NULL and "size" zero if the socket was closed for
2221 * writing in the meantime.
2223 * @param cls closure (MeshDataDescriptor)
2224 * @param size number of bytes available in buf
2225 * @param buf where the callee should write the message
2226 * @return number of bytes written to buf
2229 send_core_path_ack (void *cls, size_t size, void *buf)
2231 struct MeshDataDescriptor *info = cls;
2232 struct GNUNET_MESH_PathACK *msg = buf;
2234 GNUNET_assert (NULL != info);
2237 info->peer->core_transmit[info->handler_n] = NULL;
2239 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2244 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2245 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2246 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2247 msg->tid = htonl (info->origin->tid);
2248 msg->peer_id = my_full_id;
2250 /* TODO add signature */
2252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: PATH ACK sent!\n");
2253 return sizeof (struct GNUNET_MESH_PathACK);
2257 /******************************************************************************/
2258 /******************** MESH NETWORK HANDLERS **************************/
2259 /******************************************************************************/
2263 * Core handler for path creation
2265 * @param cls closure
2266 * @param message message
2267 * @param peer peer identity this notification is about
2268 * @param atsi performance data
2269 * @param atsi_count number of records in 'atsi'
2271 * @return GNUNET_OK to keep the connection open,
2272 * GNUNET_SYSERR to close it (signal serious error)
2275 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2276 const struct GNUNET_MessageHeader *message,
2277 const struct GNUNET_ATS_Information *atsi,
2278 unsigned int atsi_count)
2280 unsigned int own_pos;
2283 MESH_TunnelNumber tid;
2284 struct GNUNET_MESH_ManipulatePath *msg;
2285 struct GNUNET_PeerIdentity *pi;
2286 GNUNET_HashCode hash;
2287 struct MeshPeerPath *path;
2288 struct MeshPeerInfo *dest_peer_info;
2289 struct MeshPeerInfo *orig_peer_info;
2290 struct MeshTunnel *t;
2292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2293 "MESH: Received a path create msg [%s]\n",
2294 GNUNET_i2s(&my_full_id));
2295 size = ntohs (message->size);
2296 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2298 GNUNET_break_op (0);
2302 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2303 if (size % sizeof (struct GNUNET_PeerIdentity))
2305 GNUNET_break_op (0);
2308 size /= sizeof (struct GNUNET_PeerIdentity);
2311 GNUNET_break_op (0);
2314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2315 "MESH: path has %u hops.\n",
2317 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2319 tid = ntohl (msg->tid);
2320 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2321 t = tunnel_get (pi, tid);
2322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2323 "MESH: path is for tunnel %s [%X].\n",
2328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating tunnel\n");
2329 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2330 t->id.oid = GNUNET_PEER_intern (pi);
2332 t->local_tid = next_local_tid++;
2333 /* FIXME test if taken */
2334 next_local_tid |= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2335 t->tree = tree_new(t, t->id.oid);
2337 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2339 GNUNET_CONTAINER_multihashmap_put (
2343 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2349 tunnel_reset_timeout (t);
2350 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2352 GNUNET_CONTAINER_multihashmap_put (
2356 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2364 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2365 if (NULL == dest_peer_info)
2367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2368 "MESH: Creating PeerInfo for destination.\n");
2369 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2370 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2371 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2373 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2375 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2376 if (NULL == orig_peer_info)
2378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2379 "MESH: Creating PeerInfo for origin.\n");
2380 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2381 orig_peer_info->id = GNUNET_PEER_intern (pi);
2382 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2383 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2386 path = path_new (size);
2388 for (i = 0; i < size; i++)
2390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2391 "MESH: ... adding %s\n",
2392 GNUNET_i2s(&pi[i]));
2393 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2394 if (path->peers[i] == myid)
2397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2398 "MESH: Own position: %u\n", own_pos);
2401 /* cannot be self, must be 'not found' */
2402 /* create path: self not found in path through self */
2403 GNUNET_break_op (0);
2404 path_destroy (path);
2405 /* FIXME error. destroy tunnel? leave for timeout? */
2408 tunnel_add_path (t, path, own_pos);
2409 if (own_pos == size - 1)
2411 /* It is for us! Send ack. */
2412 struct GNUNET_MESH_TunnelNotification cmsg;
2413 struct MeshDataDescriptor *info;
2416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2417 "MESH: It's for us!\n");
2418 path_add_to_origin (orig_peer_info, path);
2419 t->peers = GNUNET_CONTAINER_multihashmap_create(4);
2420 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2422 &my_full_id.hashPubKey,
2423 peer_info_get(&my_full_id),
2424 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2425 info = GNUNET_malloc (sizeof (struct MeshDataDescriptor));
2426 info->origin = &t->id;
2427 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2428 GNUNET_assert (NULL != info->peer);
2429 j = peer_info_transmit_slot(info->peer);
2430 info->handler_n = j;
2431 info->peer->types[j] = GNUNET_MESSAGE_TYPE_MESH_PATH_ACK;
2432 info->peer->infos[j] = info;
2433 info->peer->core_transmit[j] =
2434 GNUNET_CORE_notify_transmit_ready (core_handle, 0, 100,
2435 GNUNET_TIME_UNIT_FOREVER_REL, peer,
2436 sizeof (struct GNUNET_MESH_PathACK),
2437 &send_core_path_ack, info);
2438 cmsg.header.size = htons(sizeof(cmsg));
2439 cmsg.header.type = htons(GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2440 GNUNET_PEER_resolve(t->id.oid, &cmsg.peer);
2441 cmsg.tunnel_id = htonl(t->local_tid);
2442 GNUNET_SERVER_notification_context_broadcast(nc, &cmsg.header, GNUNET_NO);
2446 struct MeshPeerPath *path2;
2448 /* It's for somebody else! Retransmit. */
2449 path2 = path_duplicate(path);
2450 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2451 "MESH: Retransmitting.\n");
2452 path_add_to_peer(dest_peer_info, path);
2453 path = path_duplicate(path2);
2454 path_add_to_origin(orig_peer_info, path2);
2455 send_create_path(dest_peer_info, path, t);
2462 * Core handler for path destruction
2464 * @param cls closure
2465 * @param message message
2466 * @param peer peer identity this notification is about
2467 * @param atsi performance data
2468 * @param atsi_count number of records in 'atsi'
2470 * @return GNUNET_OK to keep the connection open,
2471 * GNUNET_SYSERR to close it (signal serious error)
2474 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2475 const struct GNUNET_MessageHeader *message,
2476 const struct GNUNET_ATS_Information *atsi,
2477 unsigned int atsi_count)
2479 struct GNUNET_MESH_ManipulatePath *msg;
2480 struct GNUNET_PeerIdentity *pi;
2481 struct MeshPeerPath *path;
2482 struct MeshTunnel *t;
2483 unsigned int own_pos;
2487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2488 "MESH: Received a PATH DESTROY msg from %s\n",
2490 size = ntohs (message->size);
2491 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2493 GNUNET_break_op (0);
2497 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2498 if (size % sizeof (struct GNUNET_PeerIdentity))
2500 GNUNET_break_op (0);
2503 size /= sizeof (struct GNUNET_PeerIdentity);
2506 GNUNET_break_op (0);
2509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2510 "MESH: path has %u hops.\n",
2513 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2514 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2516 "MESH: path is for tunnel %s [%X].\n",
2519 t = tunnel_get (pi, ntohl (msg->tid));
2522 /* TODO notify back: we don't know this tunnel */
2523 GNUNET_break_op (0);
2526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Creating path...\n");
2527 path = path_new (size);
2529 for (i = 0; i < size; i++)
2531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2532 "MESH: ... adding %s\n",
2533 GNUNET_i2s(&pi[i]));
2534 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
2535 if (path->peers[i] == myid)
2538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2539 "MESH: Own position: %u\n", own_pos);
2540 if (own_pos < path->length - 1)
2541 send_message (message, &pi[own_pos + 1]);
2542 tunnel_delete_peer (t, path->peers[path->length - 1]);
2548 * Core handler for tunnel destruction
2550 * @param cls closure
2551 * @param message message
2552 * @param peer peer identity this notification is about
2553 * @param atsi performance data
2554 * @param atsi_count number of records in 'atsi'
2556 * @return GNUNET_OK to keep the connection open,
2557 * GNUNET_SYSERR to close it (signal serious error)
2560 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
2561 const struct GNUNET_MessageHeader *message,
2562 const struct GNUNET_ATS_Information *atsi,
2563 unsigned int atsi_count)
2565 struct GNUNET_MESH_TunnelDestroy *msg;
2566 struct MeshTunnel *t;
2568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2569 "MESH: Got a TUNNEL DESTROY packet from %s\n",
2571 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
2572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2573 "MESH: for tunnel %s [%u]\n",
2574 GNUNET_i2s (&msg->oid),
2576 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2579 /* TODO notify back: we don't know this tunnel */
2580 GNUNET_break_op (0);
2583 if (t->id.oid == myid)
2585 GNUNET_break_op (0);
2588 if (t->local_tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2590 /* Tunnel was incoming, notify clients */
2591 send_clients_tunnel_destroy (t);
2593 tunnel_send_destroy (t);
2600 * Core handler for mesh network traffic going from the origin to a peer
2602 * @param cls closure
2603 * @param peer peer identity this notification is about
2604 * @param message message
2605 * @param atsi performance data
2606 * @param atsi_count number of records in 'atsi'
2607 * @return GNUNET_OK to keep the connection open,
2608 * GNUNET_SYSERR to close it (signal serious error)
2611 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2612 const struct GNUNET_MessageHeader *message,
2613 const struct GNUNET_ATS_Information *atsi,
2614 unsigned int atsi_count)
2616 struct GNUNET_MESH_Unicast *msg;
2617 struct MeshTunnel *t;
2621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2622 "MESH: got a unicast packet from %s\n",
2624 size = ntohs (message->size);
2626 sizeof (struct GNUNET_MESH_Unicast) +
2627 sizeof (struct GNUNET_MessageHeader))
2632 msg = (struct GNUNET_MESH_Unicast *) message;
2633 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2634 "MESH: of type %u\n",
2635 ntohs (msg[1].header.type));
2636 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2639 /* TODO notify back: we don't know this tunnel */
2640 GNUNET_break_op (0);
2643 tunnel_reset_timeout (t);
2644 pid = GNUNET_PEER_search(&msg->destination);
2647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2648 "MESH: it's for us! sending to clients...\n");
2649 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
2652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2653 "MESH: not for us, retransmitting...\n");
2654 send_message (message, path_get_first_hop(t->tree, pid));
2660 * Core handler for mesh network traffic going from the origin to all peers
2662 * @param cls closure
2663 * @param message message
2664 * @param peer peer identity this notification is about
2665 * @param atsi performance data
2666 * @param atsi_count number of records in 'atsi'
2667 * @return GNUNET_OK to keep the connection open,
2668 * GNUNET_SYSERR to close it (signal serious error)
2670 * TODO: Check who we got this from, to validate route.
2673 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
2674 const struct GNUNET_MessageHeader *message,
2675 const struct GNUNET_ATS_Information *atsi,
2676 unsigned int atsi_count)
2678 struct GNUNET_MESH_Multicast *msg;
2679 struct MeshTunnel *t;
2682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2683 "MESH: got a multicast packet from %s\n",
2685 size = ntohs (message->size);
2686 if (sizeof (struct GNUNET_MESH_Multicast) +
2687 sizeof (struct GNUNET_MessageHeader) > size)
2689 GNUNET_break_op (0);
2692 msg = (struct GNUNET_MESH_Multicast *) message;
2693 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2697 /* TODO notify that we dont know that tunnel */
2698 GNUNET_break_op (0);
2701 tunnel_reset_timeout (t);
2703 /* Transmit to locally interested clients */
2704 if (NULL != t->peers &&
2705 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
2707 send_subscribed_clients (message, &msg[1].header);
2709 tunnel_send_multicast(t, message);
2715 * Core handler for mesh network traffic toward the owner of a tunnel
2717 * @param cls closure
2718 * @param message message
2719 * @param peer peer identity this notification is about
2720 * @param atsi performance data
2721 * @param atsi_count number of records in 'atsi'
2723 * @return GNUNET_OK to keep the connection open,
2724 * GNUNET_SYSERR to close it (signal serious error)
2727 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
2728 const struct GNUNET_MessageHeader *message,
2729 const struct GNUNET_ATS_Information *atsi,
2730 unsigned int atsi_count)
2732 struct GNUNET_MESH_ToOrigin *msg;
2733 struct GNUNET_PeerIdentity id;
2734 struct MeshPeerInfo *peer_info;
2735 struct MeshTunnel *t;
2738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2739 "MESH: got a ToOrigin packet from %s\n",
2741 size = ntohs (message->size);
2742 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
2743 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
2745 GNUNET_break_op (0);
2748 msg = (struct GNUNET_MESH_ToOrigin *) message;
2749 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2750 "MESH: of type %u\n",
2751 ntohs (msg[1].header.type));
2752 t = tunnel_get (&msg->oid, ntohl (msg->tid));
2756 /* TODO notify that we dont know this tunnel (whom)? */
2757 GNUNET_break_op (0);
2761 if (t->id.oid == myid)
2764 struct GNUNET_MESH_ToOrigin *copy;
2766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2767 "MESH: it's for us! sending to clients...\n");
2768 if (NULL == t->client)
2770 /* got data packet for ownerless tunnel */
2771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2772 "MESH: no clients!\n");
2773 GNUNET_break_op (0);
2776 /* TODO signature verification */
2777 memcpy (cbuf, message, size);
2778 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2779 copy->tid = htonl (t->local_tid);
2780 GNUNET_SERVER_notification_context_unicast (nc,
2786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2787 "MESH: not for us, retransmitting...\n");
2789 peer_info = peer_info_get (&msg->oid);
2790 if (NULL == peer_info)
2792 /* unknown origin of tunnel */
2796 GNUNET_PEER_resolve (t->tree->me->parent->peer, &id);
2797 send_message (message, &id);
2804 * Core handler for path ACKs
2806 * @param cls closure
2807 * @param message message
2808 * @param peer peer identity this notification is about
2809 * @param atsi performance data
2810 * @param atsi_count number of records in 'atsi'
2812 * @return GNUNET_OK to keep the connection open,
2813 * GNUNET_SYSERR to close it (signal serious error)
2816 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
2817 const struct GNUNET_MessageHeader *message,
2818 const struct GNUNET_ATS_Information *atsi,
2819 unsigned int atsi_count)
2821 struct GNUNET_MESH_PathACK *msg;
2822 struct GNUNET_PeerIdentity id;
2823 struct MeshTunnelTreeNode *n;
2824 struct MeshPeerInfo *peer_info;
2825 struct MeshTunnel *t;
2827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2828 "MESH: Received a path ACK msg [%s]\n",
2829 GNUNET_i2s(&my_full_id));
2830 msg = (struct GNUNET_MESH_PathACK *) message;
2831 t = tunnel_get (&msg->oid, msg->tid);
2834 /* TODO notify that we don't know the tunnel */
2838 /* Message for us? */
2839 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
2841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: It's for us!\n");
2842 if (NULL == t->client)
2844 GNUNET_break_op (0);
2847 peer_info = peer_info_get (&msg->peer_id);
2848 if (NULL == peer_info)
2850 GNUNET_break_op (0);
2853 n = tree_find_peer(t->tree->root, peer_info->id);
2856 GNUNET_break_op (0);
2859 n->status = MESH_PEER_READY;
2860 send_client_peer_connected(t, peer_info->id);
2864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2865 "MESH: not for us, retransmitting...\n");
2866 GNUNET_PEER_resolve(t->tree->me->parent->peer, &id);
2867 peer_info = peer_info_get (&msg->oid);
2868 if (NULL == peer_info)
2870 /* If we know the tunnel, we should DEFINITELY know the peer */
2874 send_message (message, &id);
2880 * Functions to handle messages from core
2882 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
2883 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
2884 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
2885 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY, 0},
2886 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
2887 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
2888 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
2889 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2890 sizeof (struct GNUNET_MESH_PathACK)},
2896 /******************************************************************************/
2897 /**************** MESH LOCAL HANDLER HELPERS ***********************/
2898 /******************************************************************************/
2901 * deregister_app: iterator for removing each application registered by a client
2903 * @param cls closure
2904 * @param key the hash of the application id (used to access the hashmap)
2905 * @param value the value stored at the key (client)
2907 * @return GNUNET_OK on success
2910 deregister_app (void *cls, const GNUNET_HashCode * key, void *value)
2912 GNUNET_break (GNUNET_YES ==
2913 GNUNET_CONTAINER_multihashmap_remove (applications, key, value));
2919 * notify_client_connection_failure: notify a client that the connection to the
2920 * requested remote peer is not possible (for instance, no route found)
2921 * Function called when the socket is ready to queue more data. "buf" will be
2922 * NULL and "size" zero if the socket was closed for writing in the meantime.
2924 * @param cls closure
2925 * @param size number of bytes available in buf
2926 * @param buf where the callee should write the message
2927 * @return number of bytes written to buf
2930 notify_client_connection_failure (void *cls, size_t size, void *buf)
2933 struct MeshPeerInfo *peer_info;
2934 struct GNUNET_MESH_PeerControl *msg;
2935 struct GNUNET_PeerIdentity id;
2937 if (0 == size && NULL == buf)
2939 // TODO retry? cancel?
2943 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
2944 peer_info = (struct MeshPeerInfo *) cls;
2945 msg = (struct GNUNET_MESH_PeerControl *) buf;
2946 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2947 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
2948 // msg->tunnel_id = htonl(peer_info->t->tid);
2949 GNUNET_PEER_resolve (peer_info->id, &id);
2950 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
2958 * Send keepalive packets for a peer
2960 * @param cls Closure (tunnel for which to send the keepalive).
2961 * @param tc Notification context.
2963 * TODO: implement explicit multicast keepalive?
2966 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2968 struct MeshTunnel *t = cls;
2969 struct GNUNET_MessageHeader *payload;
2970 struct GNUNET_MESH_Multicast *msg;
2971 size_t size = sizeof(struct GNUNET_MESH_Multicast) +
2972 sizeof(struct GNUNET_MessageHeader);
2975 if (tc->reason == GNUNET_SCHEDULER_REASON_SHUTDOWN)
2979 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
2981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2982 "MESH: sending keepalive for tunnel %d\n",
2985 msg = (struct GNUNET_MESH_Multicast *) cbuf;
2986 msg->header.size = htons (size);
2987 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
2988 msg->oid = my_full_id;
2989 msg->tid = htonl(t->id.tid);
2990 payload = (struct GNUNET_MessageHeader *) &msg[1];
2991 payload->size = htons (sizeof(struct GNUNET_MessageHeader));
2992 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
2993 tunnel_send_multicast (t, &msg->header);
2995 t->path_refresh_task =
2996 GNUNET_SCHEDULER_add_delayed (t->tree->refresh, &path_refresh, t);
3002 * Function to process paths received for a new peer addition. The recorded
3003 * paths form the initial tunnel, which can be optimized later.
3004 * Called on each result obtained for the DHT search.
3006 * @param cls closure
3007 * @param exp when will this value expire
3008 * @param key key of the result
3009 * @param type type of the result
3010 * @param size number of bytes in data
3011 * @param data pointer to the result data
3013 * TODO: re-issue the request after certain time? cancel after X results?
3016 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3017 const GNUNET_HashCode * key,
3018 const struct GNUNET_PeerIdentity *get_path,
3019 unsigned int get_path_length,
3020 const struct GNUNET_PeerIdentity *put_path,
3021 unsigned int put_path_length,
3022 enum GNUNET_BLOCK_Type type, size_t size, const void *data)
3024 struct MeshPathInfo *path_info = cls;
3025 struct MeshPeerPath *p;
3026 struct GNUNET_PeerIdentity pi;
3029 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3030 "MESH: Got results from DHT!\n");
3031 GNUNET_PEER_resolve (path_info->peer->id, &pi);
3032 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG,
3034 GNUNET_h2s_full(&pi.hashPubKey));
3035 // GNUNET_DHT_get_stop(path_info->peer->dhtget);
3036 // path_info->peer->dhtget = NULL;
3038 p = path_build_from_dht (get_path, get_path_length,
3039 put_path, put_path_length);
3040 path_add_to_peer (path_info->peer, p);
3041 for (i = 0; i < path_info->peer->ntunnels; i++)
3043 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
3044 peer_info_connect(path_info->peer, path_info->t);
3046 GNUNET_free (path_info);
3053 * Function to process paths received for a new peer addition. The recorded
3054 * paths form the initial tunnel, which can be optimized later.
3055 * Called on each result obtained for the DHT search.
3057 * @param cls closure
3058 * @param exp when will this value expire
3059 * @param key key of the result
3060 * @param type type of the result
3061 * @param size number of bytes in data
3062 * @param data pointer to the result data
3065 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3066 const GNUNET_HashCode * key,
3067 const struct GNUNET_PeerIdentity *get_path,
3068 unsigned int get_path_length,
3069 const struct GNUNET_PeerIdentity *put_path,
3070 unsigned int put_path_length,
3071 enum GNUNET_BLOCK_Type type, size_t size,
3074 const struct GNUNET_PeerIdentity *pi = data;
3075 struct GNUNET_PeerIdentity id;
3076 struct MeshTunnel *t = cls;
3077 struct MeshPeerInfo *peer_info;
3078 struct MeshPeerPath *p;
3081 if (size != sizeof (struct GNUNET_PeerIdentity))
3083 GNUNET_break_op (0);
3086 GNUNET_assert (NULL != t->client);
3087 GNUNET_DHT_get_stop (t->dht_get_type);
3088 t->dht_get_type = NULL;
3089 peer_info = peer_info_get (pi);
3090 GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey, peer_info,
3091 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3093 if ((NULL == get_path || NULL == put_path) && NULL == peer_info->path_head &&
3094 NULL == peer_info->dhtget)
3096 peer_info_connect (peer_info, t);
3100 p = path_build_from_dht (get_path, get_path_length, put_path, put_path_length);
3101 path_add_to_peer (peer_info, p);
3102 tunnel_add_peer(t, peer_info);
3103 p = tree_get_path_to_peer(t->tree, peer_info->id);
3105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3106 "MESH: new route for tunnel 0x%x found, has %u hops\n",
3107 t->local_tid, p->length);
3108 for (i = 0; i < p->length; i++)
3110 GNUNET_PEER_resolve (p->peers[0], &id);
3111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH:\t%d\t%s\n", i,
3112 GNUNET_h2s_full (&id.hashPubKey));
3118 send_create_path(peer_info, p, t);
3122 send_client_peer_connected(t, myid);
3126 /******************************************************************************/
3127 /********************* MESH LOCAL HANDLES **************************/
3128 /******************************************************************************/
3132 * Handler for client disconnection
3134 * @param cls closure
3135 * @param client identification of the client; NULL
3136 * for the last call when the server is destroyed
3139 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3141 struct MeshClient *c;
3142 struct MeshClient *next;
3144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: client disconnected\n");
3146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (SERVER DOWN)\n");
3150 if (c->handle != client && NULL != client)
3152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: ... searching\n");
3156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: matching client found\n");
3157 if (NULL != c->tunnels)
3159 GNUNET_CONTAINER_multihashmap_iterate (c->tunnels,
3160 &tunnel_destroy_iterator,
3162 GNUNET_CONTAINER_multihashmap_destroy (c->tunnels);
3165 /* deregister clients applications */
3166 if (NULL != c->apps)
3168 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, NULL);
3169 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
3171 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
3172 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
3174 GNUNET_SCHEDULER_cancel (announce_applications_task);
3175 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
3177 if (NULL != c->types)
3178 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3179 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
3185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: done!\n");
3191 * Handler for new clients
3193 * @param cls closure
3194 * @param client identification of the client
3195 * @param message the actual message, which includes messages the client wants
3198 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3199 const struct GNUNET_MessageHeader *message)
3201 struct GNUNET_MESH_ClientConnect *cc_msg;
3202 struct MeshClient *c;
3203 GNUNET_MESH_ApplicationType *a;
3210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client connected\n");
3211 /* Check data sanity */
3212 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3213 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3214 ntypes = ntohs (cc_msg->types);
3215 napps = ntohs (cc_msg->applications);
3217 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
3220 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3224 /* Create new client structure */
3225 c = GNUNET_malloc (sizeof (struct MeshClient));
3227 c->id = next_client_id++;
3230 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
3233 GNUNET_MESH_ApplicationType at;
3236 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
3237 for (i = 0; i < napps; i++)
3240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: app type: %u\n", at);
3241 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
3242 /* store in clients hashmap */
3243 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, c,
3244 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3245 /* store in global hashmap, for announcements */
3246 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
3247 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3249 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
3250 announce_applications_task =
3251 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
3259 t = (uint16_t *) & a[napps];
3260 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
3261 for (i = 0; i < ntypes; i++)
3264 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
3266 /* store in clients hashmap */
3267 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3268 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3269 /* store in global hashmap */
3270 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3271 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3274 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3275 "MESH: client has %u+%u subscriptions\n", napps, ntypes);
3277 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
3278 c->tunnels = GNUNET_CONTAINER_multihashmap_create (32);
3279 GNUNET_SERVER_notification_context_add (nc, client);
3281 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3283 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new client processed\n");
3289 * Handler for requests of new tunnels
3291 * @param cls closure
3292 * @param client identification of the client
3293 * @param message the actual message
3296 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3297 const struct GNUNET_MessageHeader *message)
3299 struct GNUNET_MESH_TunnelMessage *t_msg;
3300 struct MeshTunnel *t;
3301 struct MeshClient *c;
3302 GNUNET_HashCode hash;
3304 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: new tunnel requested\n");
3306 /* Sanity check for client registration */
3307 if (NULL == (c = client_get (client)))
3310 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3317 /* Message sanity check */
3318 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3321 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3325 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3326 /* Sanity check for tunnel numbering */
3327 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3330 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3333 /* Sanity check for duplicate tunnel IDs */
3334 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
3337 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3341 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: CREATED TUNNEL at %p\n", t);
3343 while (NULL != tunnel_get_by_pi (myid, next_tid))
3344 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3345 t->id.tid = next_tid++;
3347 t->local_tid = ntohl (t_msg->tunnel_id);
3349 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
3351 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3353 GNUNET_CONTAINER_multihashmap_put (c->tunnels, &hash, t,
3354 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3357 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3361 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3363 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3364 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3367 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3370 t->tree = tree_new (t, myid);
3371 t->tree->refresh = REFRESH_PATH_TIME;
3372 t->tree->root->status = MESH_PEER_READY;
3373 t->tree->me = t->tree->root;
3375 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3381 * Handler for requests of deleting tunnels
3383 * @param cls closure
3384 * @param client identification of the client
3385 * @param message the actual message
3388 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3389 const struct GNUNET_MessageHeader *message)
3391 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3392 struct MeshClient *c;
3393 struct MeshTunnel *t;
3394 MESH_TunnelNumber tid;
3395 GNUNET_HashCode hash;
3397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3398 "MESH: Got a DESTROY TUNNEL from client!\n");
3400 /* Sanity check for client registration */
3401 if (NULL == (c = client_get (client)))
3404 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3407 /* Message sanity check */
3408 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3411 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: by client %u\n", c->id);
3417 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3419 /* Retrieve tunnel */
3420 tid = ntohl (tunnel_msg->tunnel_id);
3422 /* Remove from local id hashmap */
3423 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3424 t = GNUNET_CONTAINER_multihashmap_get (c->tunnels, &hash);
3425 GNUNET_CONTAINER_multihashmap_remove (c->tunnels, &hash, t);
3428 tunnel_send_destroy (t);
3430 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3436 * Handler for connection requests to new peers
3438 * @param cls closure
3439 * @param client identification of the client
3440 * @param message the actual message (PeerControl)
3443 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
3444 const struct GNUNET_MessageHeader *message)
3446 struct GNUNET_MESH_PeerControl *peer_msg;
3447 struct MeshPeerInfo *peer_info;
3448 struct MeshClient *c;
3449 struct MeshTunnel *t;
3450 MESH_TunnelNumber tid;
3452 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: Got connection request\n");
3453 /* Sanity check for client registration */
3454 if (NULL == (c = client_get (client)))
3457 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3461 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3462 /* Sanity check for message size */
3463 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3466 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3470 /* Tunnel exists? */
3471 tid = ntohl (peer_msg->tunnel_id);
3472 t = tunnel_get_by_local_id (c, tid);
3476 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3480 /* Does client own tunnel? */
3481 if (t->client->handle != client)
3484 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3487 GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "MESH: for %s\n",
3488 GNUNET_h2s_full(&peer_msg->peer.hashPubKey));
3489 peer_info = peer_info_get (&peer_msg->peer);
3491 tunnel_add_peer(t, peer_info);
3492 peer_info_connect(peer_info, t);
3494 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3500 * Handler for disconnection requests of peers in a tunnel
3502 * @param cls closure
3503 * @param client identification of the client
3504 * @param message the actual message (PeerControl)
3507 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
3508 const struct GNUNET_MessageHeader *message)
3510 struct GNUNET_MESH_PeerControl *peer_msg;
3511 struct MeshPeerInfo *peer_info;
3512 struct MeshClient *c;
3513 struct MeshTunnel *t;
3514 MESH_TunnelNumber tid;
3516 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Got a PEER DEL request\n");
3517 /* Sanity check for client registration */
3518 if (NULL == (c = client_get (client)))
3521 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3524 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
3525 /* Sanity check for message size */
3526 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
3529 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3533 /* Tunnel exists? */
3534 tid = ntohl (peer_msg->tunnel_id);
3535 t = tunnel_get_by_local_id (c, tid);
3539 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: on tunnel %X\n", t->id.tid);
3544 /* Does client own tunnel? */
3545 if (t->client->handle != client)
3548 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3553 "MESH: for peer %s\n",
3554 GNUNET_i2s(&peer_msg->peer));
3555 /* Is the peer in the tunnel? */
3556 peer_info = GNUNET_CONTAINER_multihashmap_get(t->peers,
3557 &peer_msg->peer.hashPubKey);
3558 if (NULL == peer_info)
3561 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3565 /* Ok, delete peer from tunnel */
3566 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
3567 &peer_msg->peer.hashPubKey);
3569 send_destroy_path (t, peer_info->id);
3570 tunnel_delete_peer(t, peer_info->id);
3571 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3577 * Handler for connection requests to new peers by type
3579 * @param cls closure
3580 * @param client identification of the client
3581 * @param message the actual message (ConnectPeerByType)
3584 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
3585 const struct GNUNET_MessageHeader *message)
3587 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
3588 struct MeshClient *c;
3589 struct MeshTunnel *t;
3590 GNUNET_HashCode hash;
3591 MESH_TunnelNumber tid;
3593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: got connect by type request\n");
3594 /* Sanity check for client registration */
3595 if (NULL == (c = client_get (client)))
3598 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3602 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
3603 /* Sanity check for message size */
3604 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
3605 ntohs (connect_msg->header.size))
3608 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3612 /* Tunnel exists? */
3613 tid = ntohl (connect_msg->tunnel_id);
3614 t = tunnel_get_by_local_id (c, tid);
3618 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3622 /* Does client own tunnel? */
3623 if (t->client->handle != client)
3626 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3630 /* Do WE have the service? */
3631 t->type = ntohl (connect_msg->type);
3632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: type requested: %u\n", t->type);
3633 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
3634 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
3637 /* Yes! Fast forward, add ourselves to the tunnel and send the
3638 * good news to the client
3640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: available locally\n");
3641 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
3642 peer_info_get (&my_full_id),
3643 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: notifying client\n");
3646 send_client_peer_connected(t, myid);
3647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Done\n");
3648 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3651 /* Ok, lets find a peer offering the service */
3652 if (NULL != t->dht_get_type)
3654 GNUNET_DHT_get_stop (t->dht_get_type);
3656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: looking in DHT for %s\n",
3657 GNUNET_h2s_full (&hash));
3659 GNUNET_DHT_get_start (dht_handle,
3660 GNUNET_TIME_UNIT_FOREVER_REL,
3661 GNUNET_BLOCK_TYPE_TEST,
3664 GNUNET_DHT_RO_RECORD_ROUTE |
3665 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
3667 &dht_get_type_handler, t);
3669 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3675 * Handler for client traffic directed to one peer
3677 * @param cls closure
3678 * @param client identification of the client
3679 * @param message the actual message
3682 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
3683 const struct GNUNET_MessageHeader *message)
3685 struct MeshClient *c;
3686 struct MeshTunnel *t;
3687 struct MeshPeerInfo *pi;
3688 struct GNUNET_MESH_Unicast *data_msg;
3689 MESH_TunnelNumber tid;
3692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3693 "MESH: Got a unicast request from a client!\n");
3695 /* Sanity check for client registration */
3696 if (NULL == (c = client_get (client)))
3699 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3702 data_msg = (struct GNUNET_MESH_Unicast *) message;
3703 /* Sanity check for message size */
3704 size = ntohs (message->size);
3705 if (sizeof (struct GNUNET_MESH_Unicast) +
3706 sizeof (struct GNUNET_MessageHeader) > size)
3709 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3713 /* Tunnel exists? */
3714 tid = ntohl (data_msg->tid);
3715 t = tunnel_get_by_local_id (c, tid);
3719 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3723 /* Is it a local tunnel? Then, does client own the tunnel? */
3724 if (NULL != t->client &&
3725 NULL != t->client->handle &&
3726 t->client->handle != client)
3729 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3733 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
3734 &data_msg->destination.hashPubKey);
3735 /* Is the selected peer in the tunnel? */
3739 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3743 /* Ok, everything is correct, send the message
3744 * (pretend we got it from a mesh peer)
3747 char buf[ntohs (message->size)];
3748 struct GNUNET_MESH_Unicast *copy;
3750 /* Work around const limitation */
3751 copy = (struct GNUNET_MESH_Unicast *) buf;
3752 memcpy (buf, data_msg, size);
3753 copy->oid = my_full_id;
3754 copy->tid = htonl (t->id.tid);
3755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3756 "MESH: calling generic handler...\n");
3757 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
3759 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3765 * Handler for client traffic directed to the origin
3767 * @param cls closure
3768 * @param client identification of the client
3769 * @param message the actual message
3772 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
3773 const struct GNUNET_MessageHeader *message)
3775 struct GNUNET_MESH_ToOrigin *data_msg;
3776 struct GNUNET_PeerIdentity id;
3777 struct MeshClient *c;
3778 struct MeshTunnel *t;
3779 MESH_TunnelNumber tid;
3782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3783 "MESH: Got a ToOrigin request from a client!\n");
3785 /* Sanity check for client registration */
3786 if (NULL == (c = client_get (client)))
3789 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3792 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
3793 /* Sanity check for message size */
3794 size = ntohs (message->size);
3795 if (sizeof (struct GNUNET_MESH_ToOrigin) +
3796 sizeof (struct GNUNET_MessageHeader) > size)
3799 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3803 /* Tunnel exists? */
3804 tid = ntohl (data_msg->tid);
3805 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3808 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3811 t = tunnel_get_by_local_id (c, tid);
3815 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3819 /* It shouldn't be a local tunnel. */
3820 if (NULL != t->client)
3823 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3826 GNUNET_PEER_resolve(t->id.oid, &id);
3828 /* Ok, everything is correct, send the message
3829 * (pretend we got it from a mesh peer)
3832 char buf[ntohs (message->size)];
3833 struct GNUNET_MESH_ToOrigin *copy;
3835 /* Work around const limitation */
3836 copy = (struct GNUNET_MESH_ToOrigin *) buf;
3837 memcpy (buf, data_msg, size);
3839 copy->tid = htonl (t->id.tid);
3840 copy->sender = my_full_id;
3841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3842 "MESH: calling generic handler...\n");
3843 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
3845 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3851 * Handler for client traffic directed to all peers in a tunnel
3853 * @param cls closure
3854 * @param client identification of the client
3855 * @param message the actual message
3858 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
3859 const struct GNUNET_MessageHeader *message)
3861 struct MeshClient *c;
3862 struct MeshTunnel *t;
3863 struct GNUNET_MESH_Multicast *data_msg;
3864 MESH_TunnelNumber tid;
3866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3867 "MESH: Got a multicast request from a client!\n");
3869 /* Sanity check for client registration */
3870 if (NULL == (c = client_get (client)))
3873 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3876 data_msg = (struct GNUNET_MESH_Multicast *) message;
3877 /* Sanity check for message size */
3878 if (sizeof (struct GNUNET_MESH_Multicast) +
3879 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
3882 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3886 /* Tunnel exists? */
3887 tid = ntohl (data_msg->tid);
3888 t = tunnel_get_by_local_id (c, tid);
3892 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3896 /* Does client own tunnel? */
3897 if (t->client->handle != client)
3900 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3905 char buf[ntohs(message->size)];
3906 struct GNUNET_MESH_Multicast *copy;
3908 copy = (struct GNUNET_MESH_Multicast *)buf;
3909 memcpy(buf, message, ntohs(message->size));
3910 copy->oid = my_full_id;
3911 copy->tid = htonl(t->id.tid);
3912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3913 "MESH: calling generic handler...\n");
3914 handle_mesh_data_multicast(client, &my_full_id, ©->header, NULL, 0);
3917 /* receive done gets called when last copy is sent to a neighbor */
3922 * Functions to handle messages from clients
3924 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
3925 {&handle_local_new_client, NULL,
3926 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
3927 {&handle_local_tunnel_create, NULL,
3928 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
3929 sizeof (struct GNUNET_MESH_TunnelMessage)},
3930 {&handle_local_tunnel_destroy, NULL,
3931 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
3932 sizeof (struct GNUNET_MESH_TunnelMessage)},
3933 {&handle_local_connect_add, NULL,
3934 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
3935 sizeof (struct GNUNET_MESH_PeerControl)},
3936 {&handle_local_connect_del, NULL,
3937 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
3938 sizeof (struct GNUNET_MESH_PeerControl)},
3939 {&handle_local_connect_by_type, NULL,
3940 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
3941 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
3942 {&handle_local_unicast, NULL,
3943 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3944 {&handle_local_to_origin, NULL,
3945 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3946 {&handle_local_multicast, NULL,
3947 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
3953 * To be called on core init/fail.
3955 * @param cls service closure
3956 * @param server handle to the server for this service
3957 * @param identity the public identity of this peer
3960 core_init (void *cls, struct GNUNET_CORE_Handle *server,
3961 const struct GNUNET_PeerIdentity *identity)
3963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Core init\n");
3964 core_handle = server;
3965 if (0 != memcmp(identity, &my_full_id, sizeof(my_full_id)) || NULL == server)
3967 GNUNET_log(GNUNET_ERROR_TYPE_ERROR, _("MESH: Wrong CORE service\n"));
3968 GNUNET_SCHEDULER_shutdown();
3974 * Method called whenever a given peer connects.
3976 * @param cls closure
3977 * @param peer peer identity this notification is about
3978 * @param atsi performance data for the connection
3979 * @param atsi_count number of records in 'atsi'
3982 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
3983 const struct GNUNET_ATS_Information *atsi,
3984 unsigned int atsi_count)
3986 struct MeshPeerInfo *peer_info;
3987 struct MeshPeerPath *path;
3989 #if MESH_DEBUG_CONNECTION
3990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer connected\n");
3991 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
3992 GNUNET_h2s(&my_full_id.hashPubKey));
3994 peer_info = peer_info_get (peer);
3995 if (myid == peer_info->id)
3997 #if MESH_DEBUG_CONNECTION
3998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4002 #if MESH_DEBUG_CONNECTION
4005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: %s\n",
4006 GNUNET_h2s(&peer->hashPubKey));
4009 path = path_new (2);
4010 path->peers[0] = myid;
4011 path->peers[1] = peer_info->id;
4012 GNUNET_PEER_change_rc(myid, 1);
4013 GNUNET_PEER_change_rc(peer_info->id, 1);
4014 path_add_to_peer (peer_info, path);
4019 * Method called whenever a peer disconnects.
4021 * @param cls closure
4022 * @param peer peer identity this notification is about
4025 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4027 struct MeshPeerInfo *pi;
4030 #if MESH_DEBUG_CONNECTION
4031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: Peer disconnected\n");
4033 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4039 for (i = 0; i < CORE_QUEUE_SIZE; i++)
4041 peer_info_cancel_transmission(pi, i);
4043 path_remove_from_peer (pi, pi->id, myid);
4044 #if MESH_DEBUG_CONNECTION
4047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: (self)\n");
4054 /******************************************************************************/
4055 /************************ MAIN FUNCTIONS ****************************/
4056 /******************************************************************************/
4059 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4061 * @param cls closure
4062 * @param key current key code
4063 * @param value value in the hash map
4064 * @return GNUNET_YES if we should continue to iterate,
4068 shutdown_tunnel (void *cls, const GNUNET_HashCode * key, void *value)
4070 struct MeshTunnel *t = value;
4076 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4078 * @param cls closure
4079 * @param key current key code
4080 * @param value value in the hash map
4081 * @return GNUNET_YES if we should continue to iterate,
4085 shutdown_peer (void *cls, const GNUNET_HashCode * key, void *value)
4087 struct MeshPeerInfo *p = value;
4088 peer_info_destroy(p);
4093 * Task run during shutdown.
4099 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shutting down\n");
4102 /* TODO: destroy tunnels? */
4103 if (core_handle != NULL)
4105 GNUNET_CORE_disconnect (core_handle);
4108 GNUNET_CONTAINER_multihashmap_iterate(tunnels, &shutdown_tunnel, NULL);
4109 GNUNET_CONTAINER_multihashmap_iterate(peers, &shutdown_peer, NULL);
4110 if (dht_handle != NULL)
4112 GNUNET_DHT_disconnect (dht_handle);
4117 GNUNET_SERVER_notification_context_destroy (nc);
4120 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4122 GNUNET_SCHEDULER_cancel (announce_id_task);
4123 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: shut down\n");
4129 * Process mesh requests.
4131 * @param cls closure
4132 * @param server the initialized server
4133 * @param c configuration to use
4136 run (void *cls, struct GNUNET_SERVER_Handle *server,
4137 const struct GNUNET_CONFIGURATION_Handle *c)
4139 struct MeshPeerInfo *peer;
4140 struct MeshPeerPath *p;
4143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: starting to run\n");
4144 server_handle = server;
4145 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4146 CORE_QUEUE_SIZE, /* queue size */
4147 NULL, /* Closure passed to MESH functions */
4148 &core_init, /* Call core_init once connected */
4149 &core_connect, /* Handle connects */
4150 &core_disconnect, /* remove peers on disconnects */
4151 NULL, /* Don't notify about all incoming messages */
4152 GNUNET_NO, /* For header only in notification */
4153 NULL, /* Don't notify about all outbound messages */
4154 GNUNET_NO, /* For header-only out notification */
4155 core_handlers); /* Register these handlers */
4156 if (core_handle == NULL)
4159 GNUNET_SCHEDULER_shutdown ();
4164 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
4167 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4169 ("Mesh service is lacking key configuration settings. Exiting.\n"));
4170 GNUNET_SCHEDULER_shutdown ();
4173 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
4174 GNUNET_free (keyfile);
4175 if (my_private_key == NULL)
4177 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4178 _("Mesh service could not access hostkey. Exiting.\n"));
4179 GNUNET_SCHEDULER_shutdown ();
4182 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
4183 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4184 &my_full_id.hashPubKey);
4185 myid = GNUNET_PEER_intern (&my_full_id);
4187 dht_handle = GNUNET_DHT_connect (c, 64);
4188 if (dht_handle == NULL)
4194 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4196 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4197 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
4198 peers = GNUNET_CONTAINER_multihashmap_create (32);
4199 applications = GNUNET_CONTAINER_multihashmap_create (32);
4200 types = GNUNET_CONTAINER_multihashmap_create (32);
4202 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4203 nc = GNUNET_SERVER_notification_context_create (server_handle,
4205 GNUNET_SERVER_disconnect_notify (server_handle,
4206 &handle_local_client_disconnect,
4211 clients_tail = NULL;
4216 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
4217 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4219 /* Create a peer_info for the local peer */
4220 peer = peer_info_get(&my_full_id);
4223 path_add_to_peer(peer, p);
4225 /* Scheduled the task to clean up when shutdown is called */
4226 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4229 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: end of run()\n");
4233 * The main function for the mesh service.
4235 * @param argc number of arguments from the command line
4236 * @param argv command line arguments
4237 * @return 0 ok, 1 on error
4240 main (int argc, char *const *argv)
4244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main()\n");
4247 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MESH: main() END\n");