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
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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.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - relay corking down to core
44 * - set ttl relative to tree depth
50 #include "mesh_protocol.h"
51 #include "mesh_tunnel_tree.h"
52 #include "block_mesh.h"
53 #include "mesh_block_lib.h"
54 #include "gnunet_dht_service.h"
55 #include "gnunet_statistics_service.h"
56 #include "gnunet_regex_lib.h"
58 #define MESH_BLOOM_SIZE 128
60 #define MESH_DEBUG_DHT GNUNET_YES
61 #define MESH_DEBUG_CONNECTION GNUNET_NO
63 #if MESH_DEBUG_CONNECTION
64 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
66 #define DEBUG_CONN(...)
70 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
72 #define DEBUG_DHT(...)
75 /******************************************************************************/
76 /************************ DATA STRUCTURES ****************************/
77 /******************************************************************************/
79 /** FWD declaration */
84 * Struct representing a piece of data being sent to other peers
88 /** Tunnel it belongs to. */
91 /** In case of a multicast, task to allow a client to send more data if
92 * some neighbor is too slow. */
93 GNUNET_SCHEDULER_TaskIdentifier *task;
95 /** How many remaining neighbors we need to send this to. */
96 unsigned int *reference_counter;
98 /** Size of the data. */
107 * Struct containing info about a queued transmission to this peer
114 struct MeshPeerQueue *next;
119 struct MeshPeerQueue *prev;
122 * Peer this transmission is directed to.
124 struct MeshPeerInfo *peer;
127 * Tunnel this message belongs to.
129 struct MeshTunnel *tunnel;
132 * Pointer to info stucture used as cls.
142 * Size of the message
149 * Struct containing all info possibly needed to build a package when called
152 struct MeshTransmissionDescriptor
154 /** ID of the tunnel this packet travels in */
155 struct MESH_TunnelID *origin;
157 /** Who was this message being sent to */
158 struct MeshPeerInfo *peer;
160 /** Ultimate destination of the packet */
161 GNUNET_PEER_Id destination;
163 /** Data descriptor */
164 struct MeshData* mesh_data;
169 * Struct containing all information regarding a given peer
179 * Last time we heard from this peer
181 struct GNUNET_TIME_Absolute last_contact;
184 * Number of attempts to reconnect so far
186 int n_reconnect_attempts;
189 * Paths to reach the peer, ordered by ascending hop count
191 struct MeshPeerPath *path_head;
194 * Paths to reach the peer, ordered by ascending hop count
196 struct MeshPeerPath *path_tail;
199 * Handle to stop the DHT search for a path to this peer
201 struct GNUNET_DHT_GetHandle *dhtget;
204 * Closure given to the DHT GET
206 struct MeshPathInfo *dhtgetcls;
209 * Array of tunnels this peer participates in
210 * (most probably a small amount, therefore not a hashmap)
211 * When the path to the peer changes, notify these tunnels to let them
212 * re-adjust their path trees.
214 struct MeshTunnel **tunnels;
217 * Number of tunnels this peers participates in
219 unsigned int ntunnels;
222 * Transmission queue to core DLL head
224 struct MeshPeerQueue *queue_head;
227 * Transmission queue to core DLL tail
229 struct MeshPeerQueue *queue_tail;
232 * How many messages are in the queue to this peer.
234 unsigned int queue_n;
237 * Handle to for queued transmissions
239 struct GNUNET_CORE_TransmitHandle *core_transmit;
244 * Globally unique tunnel identification (owner + number)
245 * DO NOT USE OVER THE NETWORK
250 * Node that owns the tunnel
255 * Tunnel number to differentiate all the tunnels owned by the node oid
256 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
258 MESH_TunnelNumber tid;
262 struct MeshClient; /* FWD declaration */
265 * Struct containing all information regarding a tunnel
266 * For an intermediate node the improtant info used will be:
267 * - id Tunnel unique identification
268 * - paths[0] To know where to send it next
269 * - metainfo: ready, speeds, accounting
276 struct MESH_TunnelID id;
279 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
281 MESH_TunnelNumber local_tid;
284 * Local tunnel number for local destination clients (incoming number)
285 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
288 MESH_TunnelNumber local_tid_dest;
291 * Local count ID of the last packet seen/sent.
296 * SKIP value for this tunnel.
301 * MeshTunnelChildInfo of all children, indexed by GNUNET_PEER_Id.
303 struct GNUNET_CONTAINER_MultiHashMap *children_fc;
313 uint32_t max_child_ack;
316 * How many messages are in the queue.
318 unsigned int queue_n;
321 * How many messages do we accept in the queue.
323 unsigned int queue_max;
326 * Is the speed on the tunnel limited to the slowest peer?
331 * Is the tunnel bufferless (minimum latency)?
336 * Flag to signal the destruction of the tunnel.
337 * If this is set GNUNET_YES the tunnel will be destroyed
338 * when the queue is empty.
343 * Last time the tunnel was used
345 struct GNUNET_TIME_Absolute timestamp;
348 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
349 * containing peers added by id or by type, not intermediate peers.
351 struct GNUNET_CONTAINER_MultiHashMap *peers;
354 * Number of peers that are connected and potentially ready to receive data
356 unsigned int peers_ready;
359 * Number of peers that have been added to the tunnel
361 unsigned int peers_total;
364 * Client owner of the tunnel, if any
366 struct MeshClient *owner;
369 * Clients that have been informed about the tunnel, if any
371 struct MeshClient **clients;
374 * Number of elements in clients
376 unsigned int nclients;
379 * Clients that have requested to leave the tunnel
381 struct MeshClient **ignore;
384 * Number of elements in clients
386 unsigned int nignore;
391 GNUNET_PEER_Id *blacklisted;
394 * Number of elements in blacklisted
396 unsigned int nblacklisted;
399 * Bloomfilter (for peer identities) to stop circular routes
401 char bloomfilter[MESH_BLOOM_SIZE];
406 struct MeshTunnelTree *tree;
409 * Application type we are looking for in this tunnel
411 GNUNET_MESH_ApplicationType type;
414 * Used to search peers offering a service
416 struct GNUNET_DHT_GetHandle *dht_get_type;
419 * Initial context of the regex search for a connect_by_string
421 struct MeshRegexSearchContext *regex_ctx;
424 * Task to keep the used paths alive
426 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
429 * Task to destroy the tunnel after timeout
431 * FIXME: merge the two? a tunnel will have either
432 * a path refresh OR a timeout, never both!
434 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
439 * Info about a child node in a tunnel, needed to perform flow control.
441 struct MeshTunnelChildInfo
444 * ID of the child node.
459 * Maximum PID allowed.
465 * Info needed to work with tunnel paths and peers
472 struct MeshTunnel *t;
475 * Neighbouring peer to whom we send the packet to
477 struct MeshPeerInfo *peer;
482 struct MeshPeerPath *path;
487 * Struct containing information about a client of the service
494 struct MeshClient *next;
499 struct MeshClient *prev;
502 * Tunnels that belong to this client, indexed by local id
504 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
507 * Tunnels this client has accepted, indexed by incoming local id
509 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
512 * Tunnels this client has rejected, indexed by incoming local id
514 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
516 * Handle to communicate with the client
518 struct GNUNET_SERVER_Client *handle;
521 * Applications that this client has claimed to provide
523 struct GNUNET_CONTAINER_MultiHashMap *apps;
526 * Messages that this client has declared interest in
528 struct GNUNET_CONTAINER_MultiHashMap *types;
531 * Whether the client is active or shutting down (don't send confirmations
532 * to a client that is shutting down.
537 * ID of the client, mainly for debug messages
542 * Regular expressions describing the services offered by this client.
544 char **regexes; // FIXME add timeout? API to remove a regex?
547 * Number of regular expressions in regexes.
549 unsigned int n_regex;
552 * Task to refresh all regular expresions in the DHT.
554 GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
560 * Struct to keep information of searches of services described by a regex
561 * using a user-provided string service description.
563 struct MeshRegexSearchInfo
566 * Which tunnel is this for
568 struct MeshTunnel *t;
571 * User provided description of the searched service.
576 * Part of the description already consumed by the search.
583 struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
586 * Results from running DHT GETs.
588 struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
591 * Contexts, for each running DHT GET. Free all on end of search.
593 struct MeshRegexSearchContext **contexts;
596 * Number of contexts (branches/steps in search).
598 unsigned int n_contexts;
601 * Peer that is connecting via connect_by_string. When connected, free ctx.
606 * Other peers that are found but not yet being connected to.
608 GNUNET_PEER_Id *peers;
611 * Number of elements in peers.
613 unsigned int n_peers;
616 * Next peer to try to connect to.
621 * Timeout for a connect attempt.
622 * When reached, try to connect to a different peer, if any. If not,
623 * try the same peer again.
625 GNUNET_SCHEDULER_TaskIdentifier timeout;
630 * Struct to keep state of running searches that have consumed a part of
633 struct MeshRegexSearchContext
636 * Part of the description already consumed by
637 * this particular search branch.
642 * Information about the search.
644 struct MeshRegexSearchInfo *info;
648 /******************************************************************************/
649 /************************ DEBUG FUNCTIONS ****************************/
650 /******************************************************************************/
654 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
655 * @param cls string to print
656 * @param success GNUNET_OK if the PUT was transmitted,
657 * GNUNET_NO on timeout,
658 * GNUNET_SYSERR on disconnect from service
659 * after the PUT message was transmitted
660 * (so we don't know if it was received or not)
665 mesh_debug (void *cls, int success)
669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
675 /******************************************************************************/
676 /*********************** GLOBAL VARIABLES ****************************/
677 /******************************************************************************/
681 * Configuration parameters
683 static struct GNUNET_TIME_Relative refresh_path_time;
684 static struct GNUNET_TIME_Relative app_announce_time;
685 static struct GNUNET_TIME_Relative id_announce_time;
686 static struct GNUNET_TIME_Relative unacknowledged_wait_time;
687 static struct GNUNET_TIME_Relative connect_timeout;
688 static long long unsigned int default_ttl;
689 static long long unsigned int dht_replication_level;
690 static long long unsigned int max_tunnels;
691 static long long unsigned int max_msgs_queue;
694 * DLL with all the clients, head.
696 static struct MeshClient *clients;
699 * DLL with all the clients, tail.
701 static struct MeshClient *clients_tail;
704 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
706 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
709 * Number of tunnels known.
711 static unsigned long long n_tunnels;
714 * Tunnels incoming, indexed by MESH_TunnelNumber
715 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
717 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
720 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
722 static struct GNUNET_CONTAINER_MultiHashMap *peers;
725 * Handle to communicate with transport
727 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
730 * Handle to communicate with core.
732 static struct GNUNET_CORE_Handle *core_handle;
737 static struct GNUNET_DHT_Handle *dht_handle;
742 static struct GNUNET_SERVER_Handle *server_handle;
745 * Handle to the statistics service.
747 static struct GNUNET_STATISTICS_Handle *stats;
750 * Notification context, to send messages to local clients.
752 static struct GNUNET_SERVER_NotificationContext *nc;
755 * Local peer own ID (memory efficient handle).
757 static GNUNET_PEER_Id myid;
760 * Local peer own ID (full value).
762 static struct GNUNET_PeerIdentity my_full_id;
767 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
772 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
775 * Tunnel ID for the next created tunnel (global tunnel number).
777 static MESH_TunnelNumber next_tid;
780 * Tunnel ID for the next incoming tunnel (local tunnel number).
782 static MESH_TunnelNumber next_local_tid;
785 * All application types provided by this peer.
787 static struct GNUNET_CONTAINER_MultiHashMap *applications;
790 * All message types clients of this peer are interested in.
792 static struct GNUNET_CONTAINER_MultiHashMap *types;
795 * Task to periodically announce provided applications.
797 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
800 * Task to periodically announce itself in the network.
802 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
805 * Next ID to assign to a client.
807 unsigned int next_client_id;
810 /******************************************************************************/
811 /*********************** DECLARATIONS **************************/
812 /******************************************************************************/
814 /* FIXME move declarations here */
817 * Function to process paths received for a new peer addition. The recorded
818 * paths form the initial tunnel, which can be optimized later.
819 * Called on each result obtained for the DHT search.
822 * @param exp when will this value expire
823 * @param key key of the result
824 * @param type type of the result
825 * @param size number of bytes in data
826 * @param data pointer to the result data
829 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
830 const struct GNUNET_HashCode * key,
831 const struct GNUNET_PeerIdentity *get_path,
832 unsigned int get_path_length,
833 const struct GNUNET_PeerIdentity *put_path,
834 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
835 size_t size, const void *data);
839 * Function to process DHT string to regex matching.
840 * Called on each result obtained for the DHT search.
842 * @param cls closure (search context)
843 * @param exp when will this value expire
844 * @param key key of the result
845 * @param get_path path of the get request (not used)
846 * @param get_path_length lenght of get_path (not used)
847 * @param put_path path of the put request (not used)
848 * @param put_path_length length of the put_path (not used)
849 * @param type type of the result
850 * @param size number of bytes in data
851 * @param data pointer to the result data
853 * TODO: re-issue the request after certain time? cancel after X results?
856 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
857 const struct GNUNET_HashCode * key,
858 const struct GNUNET_PeerIdentity *get_path,
859 unsigned int get_path_length,
860 const struct GNUNET_PeerIdentity *put_path,
861 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
862 size_t size, const void *data);
866 * Function to process DHT string to regex matching.
867 * Called on each result obtained for the DHT search.
869 * @param cls closure (search context)
870 * @param exp when will this value expire
871 * @param key key of the result
872 * @param get_path path of the get request (not used)
873 * @param get_path_length lenght of get_path (not used)
874 * @param put_path path of the put request (not used)
875 * @param put_path_length length of the put_path (not used)
876 * @param type type of the result
877 * @param size number of bytes in data
878 * @param data pointer to the result data
881 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
882 const struct GNUNET_HashCode * key,
883 const struct GNUNET_PeerIdentity *get_path,
884 unsigned int get_path_length,
885 const struct GNUNET_PeerIdentity *put_path,
886 unsigned int put_path_length,
887 enum GNUNET_BLOCK_Type type,
888 size_t size, const void *data);
892 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
893 * and insert it in the appropiate structures if the peer is not known yet.
895 * @param peer Short identity of the peer.
897 * @return Existing or newly created peer info.
899 static struct MeshPeerInfo *
900 peer_info_get_short (const GNUNET_PEER_Id peer);
904 * Try to establish a new connection to this peer.
905 * Use the best path for the given tunnel.
906 * If the peer doesn't have any path to it yet, try to get one.
907 * If the peer already has some path, send a CREATE PATH towards it.
909 * @param peer PeerInfo of the peer.
910 * @param t Tunnel for which to create the path, if possible.
913 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
917 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
919 * If peer already exists, reevaluate shortest path and change if different.
921 * @param t Tunnel we want to add a new peer to
922 * @param peer PeerInfo of the peer being added
926 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
930 * Removes an explicit path from a tunnel, freeing all intermediate nodes
931 * that are no longer needed, as well as nodes of no longer reachable peers.
932 * The tunnel itself is also destoyed if results in a remote empty tunnel.
934 * @param t Tunnel from which to remove the path.
935 * @param peer Short id of the peer which should be removed.
938 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
942 * Search for a tunnel by global ID using full PeerIdentities.
944 * @param oid owner of the tunnel.
945 * @param tid global tunnel number.
947 * @return tunnel handler, NULL if doesn't exist.
949 static struct MeshTunnel *
950 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
954 * Delete an active client from the tunnel.
960 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
963 * Notify a tunnel that a connection has broken that affects at least
966 * @param t Tunnel affected.
967 * @param p1 Peer that got disconnected from p2.
968 * @param p2 Peer that got disconnected from p1.
970 * @return Short ID of the peer disconnected (either p1 or p2).
971 * 0 if the tunnel remained unaffected.
973 static GNUNET_PEER_Id
974 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
979 * Get the current ack value for a tunnel, taking in account the tunnel
980 * mode and the status of all children nodes.
984 * @return Maximum PID allowed.
987 tunnel_get_ack (struct MeshTunnel *t);
991 * Iterator over edges in a regex block retrieved from the DHT.
993 * @param cls Closure.
994 * @param token Token that follows to next state.
995 * @param len Lenght of token.
996 * @param key Hash of next state.
998 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1001 regex_edge_iterator (void *cls,
1004 const struct GNUNET_HashCode *key);
1008 * Find a path to a peer that offers a regex servcie compatible
1009 * with a given string.
1011 * @param key The key of the accepting state.
1012 * @param ctx Context containing info about the string, tunnel, etc.
1015 regex_find_path (const struct GNUNET_HashCode *key,
1016 struct MeshRegexSearchContext *ctx);
1020 * Queue and pass message to core when possible.
1022 * @param cls Closure (type dependant).
1023 * @param type Type of the message, 0 for a raw message.
1024 * @param size Size of the message.
1025 * @param dst Neighbor to send message to.
1026 * @param t Tunnel this message belongs to.
1029 queue_add (void *cls, uint16_t type, size_t size,
1030 struct MeshPeerInfo *dst, struct MeshTunnel *t);
1033 * Free a transmission that was already queued with all resources
1034 * associated to the request.
1036 * @param queue Queue handler to cancel.
1037 * @param clear_cls Is it necessary to free associated cls?
1040 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1042 /******************************************************************************/
1043 /************************ ITERATORS ****************************/
1044 /******************************************************************************/
1047 * Iterator over found existing mesh regex blocks that match an ongoing search.
1049 * @param cls closure
1050 * @param key current key code
1051 * @param value value in the hash map
1052 * @return GNUNET_YES if we should continue to iterate,
1056 regex_result_iterator (void *cls,
1057 const struct GNUNET_HashCode * key,
1060 struct MeshRegexBlock *block = value;
1061 struct MeshRegexSearchContext *ctx = cls;
1063 if (GNUNET_YES == ntohl(block->accepting) &&
1064 ctx->position == strlen (ctx->info->description))
1066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
1067 regex_find_path (key, ctx);
1068 return GNUNET_YES; // We found an accept state!
1072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
1073 ctx->position, strlen(ctx->info->description),
1074 ntohl(block->accepting));
1077 (void) GNUNET_MESH_regex_block_iterate (block, SIZE_MAX,
1078 ®ex_edge_iterator, ctx);
1085 * Iterator over edges in a regex block retrieved from the DHT.
1087 * @param cls Closure (context of the search).
1088 * @param token Token that follows to next state.
1089 * @param len Lenght of token.
1090 * @param key Hash of next state.
1092 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1095 regex_edge_iterator (void *cls,
1098 const struct GNUNET_HashCode *key)
1100 struct MeshRegexSearchContext *ctx = cls;
1101 struct MeshRegexSearchContext *new_ctx;
1102 struct MeshRegexSearchInfo *info = ctx->info;
1103 struct GNUNET_DHT_GetHandle *get_h;
1107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
1108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
1109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
1110 current = &info->description[ctx->position];
1111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
1112 current_len = strlen (info->description) - ctx->position;
1113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
1114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
1115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tk[0] : %c\n", token[0]);
1116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
1117 if (len > current_len)
1119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
1120 return GNUNET_YES; // Token too long, wont match
1122 if (0 != strncmp (current, token, len))
1124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
1125 return GNUNET_YES; // Token doesn't match
1127 new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
1128 new_ctx->info = info;
1129 new_ctx->position = ctx->position + len;
1130 GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
1132 GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, key))
1134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
1135 GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results, key,
1136 ®ex_result_iterator,
1138 return GNUNET_YES; // We are already looking for it
1140 /* Start search in DHT */
1142 GNUNET_DHT_get_start (dht_handle, /* handle */
1143 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
1144 key, /* key to search */
1145 dht_replication_level, /* replication level */
1146 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1147 NULL, /* xquery */ // FIXME BLOOMFILTER
1148 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1149 &dht_get_string_handler, new_ctx);
1151 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles, key, get_h,
1152 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
1162 * Iterator over hash map entries to cancel DHT GET requests after a
1163 * successful connect_by_string.
1165 * @param cls Closure (unused).
1166 * @param key Current key code (unused).
1167 * @param value Value in the hash map (get handle).
1168 * @return GNUNET_YES if we should continue to iterate,
1172 regex_cancel_dht_get (void *cls,
1173 const struct GNUNET_HashCode * key,
1176 struct GNUNET_DHT_GetHandle *h = value;
1178 GNUNET_DHT_get_stop (h);
1184 * Iterator over hash map entries to free MeshRegexBlocks stored during the
1185 * search for connect_by_string.
1187 * @param cls Closure (unused).
1188 * @param key Current key code (unused).
1189 * @param value MeshRegexBlock in the hash map.
1190 * @return GNUNET_YES if we should continue to iterate,
1194 regex_free_result (void *cls,
1195 const struct GNUNET_HashCode * key,
1199 GNUNET_free (value);
1205 * Regex callback iterator to store own service description in the DHT.
1207 * @param cls closure.
1208 * @param key hash for current state.
1209 * @param proof proof for current state.
1210 * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
1211 * @param num_edges number of edges leaving current state.
1212 * @param edges edges leaving current state.
1215 regex_iterator (void *cls, const struct GNUNET_HashCode *key, const char *proof,
1216 int accepting, unsigned int num_edges,
1217 const struct GNUNET_REGEX_Edge *edges)
1219 struct MeshRegexBlock *block;
1220 struct MeshRegexEdge *block_edge;
1221 enum GNUNET_DHT_RouteOption opt;
1225 unsigned int offset;
1228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1229 " regex dht put for state %s\n",
1231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1238 opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
1239 if (GNUNET_YES == accepting)
1241 struct MeshRegexAccept block;
1243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1244 " state %s is accepting, putting own id\n",
1246 size = sizeof (block);
1248 block.id = my_full_id;
1250 GNUNET_DHT_put(dht_handle, key,
1251 dht_replication_level,
1252 opt | GNUNET_DHT_RO_RECORD_ROUTE,
1253 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
1256 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1261 len = strlen(proof);
1262 size = sizeof (struct MeshRegexBlock) + len;
1263 block = GNUNET_malloc (size);
1266 block->n_proof = htonl (len);
1267 block->n_edges = htonl (num_edges);
1268 block->accepting = htonl (accepting);
1270 /* Store the proof at the end of the block. */
1271 aux = (char *) &block[1];
1272 memcpy (aux, proof, len);
1275 /* Store each edge in a variable length MeshEdge struct at the
1276 * very end of the MeshRegexBlock structure.
1278 for (i = 0; i < num_edges; i++)
1280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1281 " edge %s towards %s\n",
1283 GNUNET_h2s(&edges[i].destination));
1285 /* aux points at the end of the last block */
1286 len = strlen (edges[i].label);
1287 size += sizeof (struct MeshRegexEdge) + len;
1288 // Calculate offset FIXME is this ok? use size instead?
1289 offset = aux - (char *) block;
1290 block = GNUNET_realloc (block, size);
1291 aux = &((char *) block)[offset];
1292 block_edge = (struct MeshRegexEdge *) aux;
1293 block_edge->key = edges[i].destination;
1294 block_edge->n_token = htonl (len);
1295 aux = (char *) &block_edge[1];
1296 memcpy (aux, edges[i].label, len);
1300 GNUNET_DHT_put(dht_handle, key,
1301 dht_replication_level,
1303 GNUNET_BLOCK_TYPE_MESH_REGEX, size,
1305 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1309 GNUNET_free (block);
1314 * Store the regular expression describing a local service into the DHT.
1316 * @param regex The regular expresion.
1319 regex_put (const char *regex)
1321 struct GNUNET_REGEX_Automaton *dfa;
1323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) start\n", regex);
1324 dfa = GNUNET_REGEX_construct_dfa (regex, strlen(regex));
1325 GNUNET_REGEX_iterate_all_edges (dfa, ®ex_iterator, NULL);
1326 GNUNET_REGEX_automaton_destroy (dfa);
1327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) end\n", regex);
1332 * Find a path to a peer that offers a regex servcie compatible
1333 * with a given string.
1335 * @param key The key of the accepting state.
1336 * @param ctx Context containing info about the string, tunnel, etc.
1339 regex_find_path (const struct GNUNET_HashCode *key,
1340 struct MeshRegexSearchContext *ctx)
1342 struct GNUNET_DHT_GetHandle *get_h;
1344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
1345 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
1346 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
1347 key, /* key to search */
1348 dht_replication_level, /* replication level */
1349 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE |
1350 GNUNET_DHT_RO_RECORD_ROUTE,
1351 NULL, /* xquery */ // FIXME BLOOMFILTER
1352 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1353 &dht_get_string_accept_handler, ctx);
1354 GNUNET_break (GNUNET_OK ==
1355 GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
1358 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1363 * Function called if the connect attempt to a peer found via
1364 * connect_by_string times out. Try to connect to another peer, if any.
1365 * Otherwise try to reconnect to the same peer.
1367 * @param cls Closure (info about regex search).
1368 * @param tc TaskContext.
1371 regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1373 struct MeshRegexSearchInfo *info = cls;
1374 struct MeshPeerInfo *peer_info;
1378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
1379 info->timeout = GNUNET_SCHEDULER_NO_TASK;
1380 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
1388 if (0 < info->n_peers)
1390 // Select next peer, put current in that spot.
1391 id = info->peers[info->i_peer];
1392 info->peers[info->i_peer] = info->peer;
1393 info->i_peer = (info->i_peer + 1) % info->n_peers;
1397 // Try to connect to same peer again.
1400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
1402 peer_info = peer_info_get_short(id);
1403 tunnel_add_peer (info->t, peer_info);
1405 tunnel_delete_peer (info->t, old);
1406 peer_info_connect (peer_info, info->t);
1407 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
1408 ®ex_connect_timeout,
1410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
1415 * Cancel an ongoing regex search in the DHT and free all resources.
1417 * @param ctx The search context.
1420 regex_cancel_search(struct MeshRegexSearchContext *ctx)
1422 struct MeshRegexSearchInfo *info = ctx->info;
1425 GNUNET_free (info->description);
1426 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
1427 ®ex_cancel_dht_get, NULL);
1428 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
1429 ®ex_free_result, NULL);
1430 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
1431 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
1432 info->t->regex_ctx = NULL;
1433 for (i = 0; i < info->n_contexts; i++)
1435 GNUNET_free (info->contexts[i]);
1437 if (0 < info->n_contexts)
1438 GNUNET_free (info->contexts);
1439 if (0 < info->n_peers)
1440 GNUNET_free (info->peers);
1441 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
1443 GNUNET_SCHEDULER_cancel(info->timeout);
1449 /******************************************************************************/
1450 /************************ PERIODIC FUNCTIONS ****************************/
1451 /******************************************************************************/
1454 * Announce iterator over for each application provided by the peer
1456 * @param cls closure
1457 * @param key current key code
1458 * @param value value in the hash map
1459 * @return GNUNET_YES if we should continue to
1464 announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
1466 struct PBlock block;
1467 struct MeshClient *c;
1469 block.id = my_full_id;
1470 c = GNUNET_CONTAINER_multihashmap_get (applications, key);
1471 block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
1472 if (0 == block.type)
1477 block.type = htonl (block.type);
1479 GNUNET_break (NULL !=
1480 GNUNET_DHT_put (dht_handle, key,
1481 dht_replication_level,
1482 GNUNET_DHT_RO_RECORD_ROUTE |
1483 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1484 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
1486 (const char *) &block,
1487 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1489 app_announce_time, NULL, NULL));
1495 * Periodically announce what applications are provided by local clients
1498 * @param cls closure
1499 * @param tc task context
1502 announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1504 struct MeshClient *c = cls;
1507 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1509 c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
1513 DEBUG_DHT ("Starting PUT for regex\n");
1515 for (i = 0; i < c->n_regex; i++)
1517 regex_put (c->regexes[i]);
1519 c->regex_announce_task =
1520 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_regex, cls);
1521 DEBUG_DHT ("Finished PUT for regex\n");
1528 * Periodically announce what applications are provided by local clients
1531 * @param cls closure
1532 * @param tc task context
1535 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1537 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1539 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
1543 DEBUG_DHT ("Starting PUT for apps\n");
1545 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
1547 announce_applications_task =
1548 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
1550 DEBUG_DHT ("Finished PUT for apps\n");
1557 * Periodically announce self id in the DHT
1559 * @param cls closure
1560 * @param tc task context
1563 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1565 struct PBlock block;
1567 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1569 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1573 * - Set data expiration in function of X
1574 * - Adapt X to churn
1576 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1578 block.id = my_full_id;
1579 block.type = htonl (0);
1580 GNUNET_DHT_put (dht_handle, /* DHT handle */
1581 &my_full_id.hashPubKey, /* Key to use */
1582 dht_replication_level, /* Replication level */
1583 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1584 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1585 sizeof (block), /* Size of the data */
1586 (const char *) &block, /* Data itself */
1587 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1588 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1589 NULL, /* Continuation */
1590 NULL); /* Continuation closure */
1592 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1596 /******************************************************************************/
1597 /****************** GENERAL HELPER FUNCTIONS ************************/
1598 /******************************************************************************/
1602 * Decrements the reference counter and frees all resources if needed
1604 * @param mesh_data Data Descriptor used in a multicast message.
1605 * Freed no longer needed (last message).
1608 data_descriptor_decrement_rc (struct MeshData *mesh_data)
1610 /* Make sure it's a multicast packet */
1611 GNUNET_assert (NULL != mesh_data->reference_counter);
1613 if (0 == --(*(mesh_data->reference_counter)))
1615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1616 if (NULL != mesh_data->task)
1618 if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
1620 GNUNET_SCHEDULER_cancel (*(mesh_data->task));
1621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client...\n");
1622 GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
1624 GNUNET_free (mesh_data->task);
1626 GNUNET_free (mesh_data->reference_counter);
1627 GNUNET_free (mesh_data->data);
1628 GNUNET_free (mesh_data);
1634 * Check if client has registered with the service and has not disconnected
1636 * @param client the client to check
1638 * @return non-NULL if client exists in the global DLL
1640 static struct MeshClient *
1641 client_get (struct GNUNET_SERVER_Client *client)
1643 struct MeshClient *c;
1648 if (c->handle == client)
1657 * Checks if a given client has subscribed to certain message type
1659 * @param message_type Type of message to check
1660 * @param c Client to check
1662 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1665 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1667 struct GNUNET_HashCode hc;
1669 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1670 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1675 * Allow a client to send more data after transmitting a multicast message
1676 * which some neighbor has not yet accepted altough a reasonable time has
1679 * @param cls Closure (DataDescriptor containing the task identifier)
1680 * @param tc Task Context
1682 * FIXME reference counter cshould be just int
1685 client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1687 struct MeshData *mdata = cls;
1689 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1691 GNUNET_assert (NULL != mdata->reference_counter);
1692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1693 "CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
1694 *(mdata->reference_counter));
1695 *(mdata->task) = GNUNET_SCHEDULER_NO_TASK;
1696 GNUNET_SERVER_receive_done (mdata->t->owner->handle, GNUNET_OK);
1701 * Check whether client wants traffic from a tunnel.
1703 * @param c Client to check.
1704 * @param t Tunnel to be found.
1706 * @return GNUNET_YES if client knows tunnel.
1708 * TODO look in client hashmap
1711 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1715 for (i = 0; i < t->nclients; i++)
1716 if (t->clients[i] == c)
1723 * Check whether client has been informed about a tunnel.
1725 * @param c Client to check.
1726 * @param t Tunnel to be found.
1728 * @return GNUNET_YES if client knows tunnel.
1730 * TODO look in client hashmap
1733 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1737 for (i = 0; i < t->nignore; i++)
1738 if (t->ignore[i] == c)
1740 return client_wants_tunnel(c, t);
1745 * Marks a client as uninterested in traffic from the tunnel, updating both
1746 * client and tunnel to reflect this.
1748 * @param c Client that doesn't want traffic anymore.
1749 * @param t Tunnel which should be ignored.
1751 * FIXME when to delete an incoming tunnel?
1754 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1756 struct GNUNET_HashCode hash;
1758 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1759 GNUNET_break (GNUNET_YES ==
1760 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1762 GNUNET_break (GNUNET_YES ==
1763 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
1764 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1765 tunnel_delete_active_client (t, c);
1766 GNUNET_array_append (t->ignore, t->nignore, c);
1771 * Deletes a tunnel from a client (either owner or destination). To be used on
1772 * tunnel destroy, otherwise, use client_ignore_tunnel.
1774 * @param c Client whose tunnel to delete.
1775 * @param t Tunnel which should be deleted.
1778 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1780 struct GNUNET_HashCode hash;
1784 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1785 GNUNET_assert (GNUNET_YES ==
1786 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
1792 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1794 GNUNET_assert (GNUNET_YES ==
1795 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1799 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
1808 * Send the message to all clients that have subscribed to its type
1810 * @param msg Pointer to the message itself
1811 * @param payload Pointer to the payload of the message.
1812 * @return number of clients this message was sent to
1815 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
1816 const struct GNUNET_MessageHeader *payload)
1818 struct GNUNET_PeerIdentity *oid;
1819 struct MeshClient *c;
1820 struct MeshTunnel *t;
1821 MESH_TunnelNumber *tid;
1824 char cbuf[htons (msg->size)];
1826 type = ntohs (payload->type);
1827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
1828 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %u\n", type);
1830 memcpy (cbuf, msg, sizeof (cbuf));
1831 switch (htons (msg->type))
1833 struct GNUNET_MESH_Unicast *uc;
1834 struct GNUNET_MESH_Multicast *mc;
1835 struct GNUNET_MESH_ToOrigin *to;
1837 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1838 uc = (struct GNUNET_MESH_Unicast *) cbuf;
1842 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
1843 mc = (struct GNUNET_MESH_Multicast *) cbuf;
1847 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1848 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
1856 t = tunnel_get (oid, ntohl (*tid));
1863 for (count = 0, c = clients; c != NULL; c = c->next)
1865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
1866 if (client_is_subscribed (type, c))
1868 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
1872 *tid = htonl (t->local_tid);
1876 if (GNUNET_NO == client_knows_tunnel (c, t))
1878 /* This client doesn't know the tunnel */
1879 struct GNUNET_MESH_TunnelNotification tmsg;
1880 struct GNUNET_HashCode hash;
1882 tmsg.header.size = htons (sizeof (tmsg));
1883 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1884 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
1885 tmsg.tunnel_id = htonl (t->local_tid_dest);
1886 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1887 &tmsg.header, GNUNET_NO);
1888 GNUNET_array_append (t->clients, t->nclients, c);
1889 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1891 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
1892 c->incoming_tunnels, &hash, t,
1893 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1895 *tid = htonl (t->local_tid_dest);
1898 /* Check if the client wants to get traffic from the tunnel */
1899 if (GNUNET_NO == client_wants_tunnel(c, t))
1902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
1903 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1904 (struct GNUNET_MessageHeader
1905 *) cbuf, GNUNET_YES);
1913 * Notify the client that owns the tunnel that a peer has connected to it
1914 * (the requested path to it has been confirmed).
1916 * @param t Tunnel whose owner to notify
1917 * @param id Short id of the peer that has connected
1920 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
1922 struct GNUNET_MESH_PeerControl pc;
1924 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1925 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1926 pc.tunnel_id = htonl (t->local_tid);
1927 GNUNET_PEER_resolve (id, &pc.peer);
1928 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
1934 * Notify a client about how many more payload packages will we accept
1935 * on a given tunnel.
1941 send_client_tunnel_ack (struct MeshClient *c, struct MeshTunnel *t)
1943 struct GNUNET_MESH_LocalAck msg;
1946 ack = tunnel_get_ack (t);
1948 msg.header.size = htons (sizeof (msg));
1949 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1950 msg.tunnel_id = htonl (t->local_tid);
1953 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1954 &msg.header, GNUNET_NO);
1959 * Notify all clients (not depending on registration status) that the incoming
1960 * tunnel is no longer valid.
1962 * @param t Tunnel that was destroyed.
1965 send_clients_tunnel_destroy (struct MeshTunnel *t)
1967 struct GNUNET_MESH_TunnelMessage msg;
1969 msg.header.size = htons (sizeof (msg));
1970 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1971 msg.tunnel_id = htonl (t->local_tid_dest);
1972 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
1977 * Notify clients of tunnel disconnections, if needed.
1978 * In case the origin disconnects, the destination clients get a tunnel destroy
1979 * notification. If the last destination disconnects (only one remaining client
1980 * in tunnel), the origin gets a (local ID) peer disconnected.
1981 * Note that the function must be called BEFORE removing the client from
1984 * @param t Tunnel that was destroyed.
1985 * @param c Client that disconnected.
1988 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
1994 struct GNUNET_MESH_TunnelMessage msg;
1996 msg.header.size = htons (sizeof (msg));
1997 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1998 msg.tunnel_id = htonl (t->local_tid_dest);
1999 for (i = 0; i < t->nclients; i++)
2000 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2001 &msg.header, GNUNET_NO);
2003 // FIXME when to disconnect an incoming tunnel?
2004 else if (1 == t->nclients && NULL != t->owner)
2006 struct GNUNET_MESH_PeerControl msg;
2008 msg.header.size = htons (sizeof (msg));
2009 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2010 msg.tunnel_id = htonl (t->local_tid);
2011 msg.peer = my_full_id;
2012 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2013 &msg.header, GNUNET_NO);
2019 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2020 * and insert it in the appropiate structures if the peer is not known yet.
2022 * @param peer Full identity of the peer.
2024 * @return Existing or newly created peer info.
2026 static struct MeshPeerInfo *
2027 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2029 struct MeshPeerInfo *peer_info;
2031 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2032 if (NULL == peer_info)
2035 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2036 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2037 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2038 peer_info->id = GNUNET_PEER_intern (peer);
2046 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2047 * and insert it in the appropiate structures if the peer is not known yet.
2049 * @param peer Short identity of the peer.
2051 * @return Existing or newly created peer info.
2053 static struct MeshPeerInfo *
2054 peer_info_get_short (const GNUNET_PEER_Id peer)
2056 struct GNUNET_PeerIdentity id;
2058 GNUNET_PEER_resolve (peer, &id);
2059 return peer_info_get (&id);
2064 * Iterator to remove the tunnel from the list of tunnels a peer participates
2067 * @param cls Closure (tunnel info)
2068 * @param key GNUNET_PeerIdentity of the peer (unused)
2069 * @param value PeerInfo of the peer
2071 * @return always GNUNET_YES, to keep iterating
2074 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2076 struct MeshTunnel *t = cls;
2077 struct MeshPeerInfo *peer = value;
2080 for (i = 0; i < peer->ntunnels; i++)
2083 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2086 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2087 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2096 * Core callback to write a pre-constructed data packet to core buffer
2098 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2099 * @param size Number of bytes available in buf.
2100 * @param buf Where the to write the message.
2102 * @return number of bytes written to buf
2105 send_core_data_raw (void *cls, size_t size, void *buf)
2107 struct MeshTransmissionDescriptor *info = cls;
2108 struct GNUNET_MessageHeader *msg;
2111 GNUNET_assert (NULL != info);
2112 GNUNET_assert (NULL != info->mesh_data);
2113 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2114 total_size = ntohs (msg->size);
2116 if (total_size > size)
2121 memcpy (buf, msg, total_size);
2122 data_descriptor_decrement_rc (info->mesh_data);
2129 * Sends an already built non-multicast message to a peer,
2130 * properly registrating all used resources.
2132 * @param message Message to send. Function makes a copy of it.
2133 * @param peer Short ID of the neighbor whom to send the message.
2134 * @param t Tunnel on which this message is transmitted.
2137 send_message (const struct GNUNET_MessageHeader *message,
2138 const struct GNUNET_PeerIdentity *peer,
2139 struct MeshTunnel *t)
2141 struct MeshTransmissionDescriptor *info;
2142 struct MeshPeerInfo *neighbor;
2143 struct MeshPeerPath *p;
2146 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2148 size = ntohs (message->size);
2149 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2150 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2151 info->mesh_data->data = GNUNET_malloc (size);
2152 memcpy (info->mesh_data->data, message, size);
2153 if (ntohs(message->type) == GNUNET_MESSAGE_TYPE_MESH_UNICAST)
2155 struct GNUNET_MESH_Unicast *m;
2157 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2158 m->ttl = htonl (ntohl (m->ttl) - 1);
2160 info->mesh_data->data_len = size;
2161 info->mesh_data->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2162 *info->mesh_data->reference_counter = 1;
2163 neighbor = peer_info_get (peer);
2164 for (p = neighbor->path_head; NULL != p; p = p->next)
2173 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2174 GNUNET_free (info->mesh_data->data);
2175 GNUNET_free (info->mesh_data);
2179 info->peer = neighbor;
2189 * Sends a CREATE PATH message for a path to a peer, properly registrating
2190 * all used resources.
2192 * @param peer PeerInfo of the final peer for whom this path is being created.
2193 * @param p Path itself.
2194 * @param t Tunnel for which the path is created.
2197 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2198 struct MeshTunnel *t)
2200 struct GNUNET_PeerIdentity id;
2201 struct MeshPathInfo *path_info;
2202 struct MeshPeerInfo *neighbor;
2208 p = tree_get_path_to_peer (t->tree, peer->id);
2215 for (i = 0; i < p->length; i++)
2217 if (p->peers[i] == myid)
2220 if (i >= p->length - 1)
2226 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2228 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2229 path_info->path = p;
2231 neighbor = peer_info_get (&id);
2232 path_info->peer = neighbor;
2233 queue_add (path_info,
2234 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2235 sizeof (struct GNUNET_MESH_ManipulatePath) +
2236 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2243 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2245 * @param t Tunnel whose path to destroy.
2246 * @param destination Short ID of the peer to whom the path to destroy.
2249 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2251 struct MeshPeerPath *p;
2254 p = tree_get_path_to_peer (t->tree, destination);
2260 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2261 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2263 struct GNUNET_MESH_ManipulatePath *msg;
2264 struct GNUNET_PeerIdentity *pi;
2268 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2269 msg->header.size = htons (size);
2270 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2271 msg->tid = htonl (t->id.tid);
2272 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2273 for (i = 0; i < p->length; i++)
2275 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2277 send_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2284 * Try to establish a new connection to this peer.
2285 * Use the best path for the given tunnel.
2286 * If the peer doesn't have any path to it yet, try to get one.
2287 * If the peer already has some path, send a CREATE PATH towards it.
2289 * @param peer PeerInfo of the peer.
2290 * @param t Tunnel for which to create the path, if possible.
2293 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2295 struct MeshPeerPath *p;
2296 struct MeshPathInfo *path_info;
2298 if (NULL != peer->path_head)
2300 p = tree_get_path_to_peer (t->tree, peer->id);
2307 // FIXME always send create path to self
2310 send_create_path (peer, p, t);
2314 struct GNUNET_HashCode hash;
2317 send_client_peer_connected (t, myid);
2318 t->local_tid_dest = next_local_tid++;
2319 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2322 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2323 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2330 else if (NULL == peer->dhtget)
2332 struct GNUNET_PeerIdentity id;
2334 GNUNET_PEER_resolve (peer->id, &id);
2335 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2336 path_info->peer = peer;
2338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2339 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2340 peer->dhtgetcls = path_info;
2341 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2342 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2343 &id.hashPubKey, /* key to search */
2344 dht_replication_level, /* replication level */
2345 GNUNET_DHT_RO_RECORD_ROUTE |
2346 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2347 NULL, /* xquery */ // FIXME BLOOMFILTER
2348 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2349 &dht_get_id_handler, path_info);
2351 /* Otherwise, there is no path but the DHT get is already started. */
2356 * Task to delay the connection of a peer
2358 * @param cls Closure (path info with tunnel and peer to connect).
2359 * Will be free'd on exection.
2360 * @param tc TaskContext
2363 peer_info_connect_task (void *cls,
2364 const struct GNUNET_SCHEDULER_TaskContext *tc)
2366 struct MeshPathInfo *path_info = cls;
2368 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2373 peer_info_connect (path_info->peer, path_info->t);
2379 * Destroy the peer_info and free any allocated resources linked to it
2381 * @param pi The peer_info to destroy.
2383 * @return GNUNET_OK on success
2386 peer_info_destroy (struct MeshPeerInfo *pi)
2388 struct GNUNET_PeerIdentity id;
2389 struct MeshPeerPath *p;
2390 struct MeshPeerPath *nextp;
2392 GNUNET_PEER_resolve (pi->id, &id);
2393 GNUNET_PEER_change_rc (pi->id, -1);
2396 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2399 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2400 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2402 if (NULL != pi->dhtget)
2404 GNUNET_DHT_get_stop (pi->dhtget);
2405 GNUNET_free (pi->dhtgetcls);
2411 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2421 * Remove all paths that rely on a direct connection between p1 and p2
2422 * from the peer itself and notify all tunnels about it.
2424 * @param peer PeerInfo of affected peer.
2425 * @param p1 GNUNET_PEER_Id of one peer.
2426 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2429 * TODO: optimize (see below)
2432 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2435 struct MeshPeerPath *p;
2436 struct MeshPeerPath *aux;
2437 struct MeshPeerInfo *peer_d;
2439 unsigned int destroyed;
2444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2446 p = peer->path_head;
2450 for (i = 0; i < (p->length - 1); i++)
2452 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2453 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2455 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2466 for (i = 0; i < peer->ntunnels; i++)
2468 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2472 * Problem: one or more peers have been deleted from the tunnel tree.
2473 * We don't know who they are to try to add them again.
2474 * We need to try to find a new path for each of the disconnected peers.
2475 * Some of them might already have a path to reach them that does not
2476 * involve p1 and p2. Adding all anew might render in a better tree than
2477 * the trivial immediate fix.
2479 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2480 * its children will be reachable trough him.
2482 peer_d = peer_info_get_short (d);
2485 for (p = peer_d->path_head; NULL != p; p = p->next)
2487 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2495 /* No callback, as peer will be already disconnected and a connection
2496 * scheduled by tunnel_notify_connection_broken.
2498 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2502 peer_info_connect (peer_d, peer->tunnels[i]);
2505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2510 * Add the path to the peer and update the path used to reach it in case this
2513 * @param peer_info Destination peer to add the path to.
2514 * @param path New path to add. Last peer must be the peer in arg 1.
2515 * Path will be either used of freed if already known.
2516 * @param trusted Do we trust that this path is real?
2519 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2522 struct MeshPeerPath *aux;
2526 if ((NULL == peer_info) || (NULL == path))
2529 path_destroy (path);
2532 if (path->peers[path->length - 1] != peer_info->id)
2535 path_destroy (path);
2538 if (path->length <= 2 && GNUNET_NO == trusted)
2540 /* Only allow CORE to tell us about direct paths */
2541 path_destroy (path);
2544 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2545 for (l = 1; l < path->length; l++)
2547 if (path->peers[l] == myid)
2549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2550 for (l2 = 0; l2 < path->length - l; l2++)
2552 path->peers[l2] = path->peers[l + l2];
2557 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2562 struct GNUNET_PeerIdentity id;
2564 GNUNET_PEER_resolve (peer_info->id, &id);
2565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2566 path->length, GNUNET_i2s (&id));
2569 l = path_get_length (path);
2576 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2577 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2579 l2 = path_get_length (aux);
2582 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2583 peer_info->path_tail, aux, path);
2588 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2590 path_destroy (path);
2595 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2602 * Add the path to the origin peer and update the path used to reach it in case
2603 * this is the shortest.
2604 * The path is given in peer_info -> destination, therefore we turn the path
2605 * upside down first.
2607 * @param peer_info Peer to add the path to, being the origin of the path.
2608 * @param path New path to add after being inversed.
2609 * @param trusted Do we trust that this path is real?
2612 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2613 struct MeshPeerPath *path, int trusted)
2616 peer_info_add_path (peer_info, path, trusted);
2621 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2622 * to obtain a local peer -> destination path and interning the peer ids.
2624 * @return Newly allocated and created path
2626 static struct MeshPeerPath *
2627 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2628 unsigned int get_path_length,
2629 const struct GNUNET_PeerIdentity *put_path,
2630 unsigned int put_path_length)
2632 struct MeshPeerPath *p;
2638 GNUNET_PEER_change_rc (myid, 1);
2639 i = get_path_length;
2640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2641 for (i--; i >= 0; i--)
2643 id = GNUNET_PEER_intern (&get_path[i]);
2644 if (p->length > 0 && id == p->peers[p->length - 1])
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2647 GNUNET_PEER_change_rc (id, -1);
2651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2652 GNUNET_i2s (&get_path[i]));
2654 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2655 p->peers[p->length - 1] = id;
2658 i = put_path_length;
2659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2660 for (i--; i >= 0; i--)
2662 id = GNUNET_PEER_intern (&put_path[i]);
2665 /* PUT path went through us, so discard the path up until now and start
2666 * from here to get a much shorter (and loop-free) path.
2671 if (p->length > 0 && id == p->peers[p->length - 1])
2673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2674 GNUNET_PEER_change_rc (id, -1);
2678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2679 GNUNET_i2s (&put_path[i]));
2681 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2682 p->peers[p->length - 1] = id;
2686 if (get_path_length > 0)
2687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2688 GNUNET_i2s (&get_path[0]));
2689 if (put_path_length > 0)
2690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2691 GNUNET_i2s (&put_path[0]));
2692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2694 for (i = 0; i < p->length; i++)
2696 struct GNUNET_PeerIdentity peer_id;
2698 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2700 GNUNET_i2s (&peer_id));
2708 * Adds a path to the peer_infos of all the peers in the path
2710 * @param p Path to process.
2711 * @param confirmed Whether we know if the path works or not.
2714 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2718 /* TODO: invert and add */
2719 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2720 for (i++; i < p->length; i++)
2722 struct MeshPeerInfo *aux;
2723 struct MeshPeerPath *copy;
2725 aux = peer_info_get_short (p->peers[i]);
2726 copy = path_duplicate (p);
2727 copy->length = i + 1;
2728 peer_info_add_path (aux, copy, GNUNET_NO);
2734 * Send keepalive packets for a peer
2736 * @param cls Closure (tunnel for which to send the keepalive).
2737 * @param tc Notification context.
2739 * TODO: implement explicit multicast keepalive?
2742 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2746 * Search for a tunnel among the incoming tunnels
2748 * @param tid the local id of the tunnel
2750 * @return tunnel handler, NULL if doesn't exist
2752 static struct MeshTunnel *
2753 tunnel_get_incoming (MESH_TunnelNumber tid)
2755 struct GNUNET_HashCode hash;
2757 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2758 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2759 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2764 * Search for a tunnel among the tunnels for a client
2766 * @param c the client whose tunnels to search in
2767 * @param tid the local id of the tunnel
2769 * @return tunnel handler, NULL if doesn't exist
2771 static struct MeshTunnel *
2772 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2774 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2776 return tunnel_get_incoming (tid);
2780 struct GNUNET_HashCode hash;
2782 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2783 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2789 * Search for a tunnel by global ID using PEER_ID
2791 * @param pi owner of the tunnel
2792 * @param tid global tunnel number
2794 * @return tunnel handler, NULL if doesn't exist
2796 static struct MeshTunnel *
2797 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2799 struct MESH_TunnelID id;
2800 struct GNUNET_HashCode hash;
2805 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2806 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2811 * Search for a tunnel by global ID using full PeerIdentities
2813 * @param oid owner of the tunnel
2814 * @param tid global tunnel number
2816 * @return tunnel handler, NULL if doesn't exist
2818 static struct MeshTunnel *
2819 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2821 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2826 * Delete an active client from the tunnel.
2832 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
2836 for (i = 0; i < t->nclients; i++)
2838 if (t->clients[i] == c)
2840 t->clients[i] = t->clients[t->nclients - 1];
2841 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
2849 * Delete an ignored client from the tunnel.
2855 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
2859 for (i = 0; i < t->nignore; i++)
2861 if (t->ignore[i] == c)
2863 t->ignore[i] = t->ignore[t->nignore - 1];
2864 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
2872 * Delete a client from the tunnel. It should be only done on
2873 * client disconnection, otherwise use client_ignore_tunnel.
2879 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
2881 tunnel_delete_ignored_client (t, c);
2882 tunnel_delete_active_client (t, c);
2887 * Iterator to free MeshTunnelChildInfo of tunnel children.
2889 * @param cls Closure (tunnel info).
2890 * @param key Hash of GNUNET_PEER_Id (unused).
2891 * @param value MeshTunnelChildInfo of the child.
2893 * @return always GNUNET_YES, to keep iterating
2896 tunnel_destroy_child (void *cls,
2897 const struct GNUNET_HashCode * key,
2900 GNUNET_free (value);
2906 * Callback used to notify a client owner of a tunnel that a peer has
2907 * disconnected, most likely because of a path change.
2909 * @param cls Closure (tunnel this notification is about).
2910 * @param peer_id Short ID of disconnected peer.
2913 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
2915 struct MeshTunnel *t = cls;
2916 struct MeshPeerInfo *peer;
2917 struct MeshPathInfo *path_info;
2919 if (NULL != t->owner && NULL != nc)
2921 struct GNUNET_MESH_PeerControl msg;
2923 msg.header.size = htons (sizeof (msg));
2924 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2925 msg.tunnel_id = htonl (t->local_tid);
2926 GNUNET_PEER_resolve (peer_id, &msg.peer);
2927 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2928 &msg.header, GNUNET_NO);
2930 peer = peer_info_get_short (peer_id);
2931 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2932 path_info->peer = peer;
2934 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
2939 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
2940 * needed rescources.
2941 * If peer already exists, reevaluate shortest path and change if different.
2943 * @param t Tunnel we want to add a new peer to
2944 * @param peer PeerInfo of the peer being added
2948 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
2950 struct GNUNET_PeerIdentity id;
2951 struct MeshPeerPath *best_p;
2952 struct MeshPeerPath *p;
2953 unsigned int best_cost;
2956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
2957 GNUNET_PEER_resolve (peer->id, &id);
2959 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
2962 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
2963 GNUNET_assert (GNUNET_OK ==
2964 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
2966 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2969 if (NULL != (p = peer->path_head))
2972 best_cost = tree_get_path_cost (t->tree, p);
2975 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
2982 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
2983 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
2984 t->path_refresh_task =
2985 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
2989 /* Start a DHT get */
2990 peer_info_connect (peer, t);
2992 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
2996 * Add a path to a tunnel which we don't own, just to remember the next hop.
2997 * If destination node was already in the tunnel, the first hop information
2998 * will be replaced with the new path.
3000 * @param t Tunnel we want to add a new peer to
3001 * @param p Path to add
3002 * @param own_pos Position of local node in path.
3006 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3007 unsigned int own_pos)
3009 struct GNUNET_PeerIdentity id;
3011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3012 GNUNET_assert (0 != own_pos);
3013 tree_add_path (t->tree, p, NULL, NULL);
3014 if (own_pos < p->length - 1)
3016 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3017 tree_update_first_hops (t->tree, myid, &id);
3019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3024 * Notifies a tunnel that a connection has broken that affects at least
3025 * some of its peers. Sends a notification towards the root of the tree.
3026 * In case the peer is the owner of the tree, notifies the client that owns
3027 * the tunnel and tries to reconnect.
3029 * @param t Tunnel affected.
3030 * @param p1 Peer that got disconnected from p2.
3031 * @param p2 Peer that got disconnected from p1.
3033 * @return Short ID of the peer disconnected (either p1 or p2).
3034 * 0 if the tunnel remained unaffected.
3036 static GNUNET_PEER_Id
3037 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3043 tree_notify_connection_broken (t->tree, p1, p2,
3044 &tunnel_notify_client_peer_disconnected,
3046 if (myid != p1 && myid != p2)
3052 if (tree_get_predecessor (t->tree) != 0)
3054 /* We are the peer still connected, notify owner of the disconnection. */
3055 struct GNUNET_MESH_PathBroken msg;
3056 struct GNUNET_PeerIdentity neighbor;
3058 msg.header.size = htons (sizeof (msg));
3059 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3060 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3061 msg.tid = htonl (t->id.tid);
3062 msg.peer1 = my_full_id;
3063 GNUNET_PEER_resolve (pid, &msg.peer2);
3064 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3065 send_message (&msg.header, &neighbor, t);
3073 * Send a multicast packet to a neighbor.
3075 * @param cls Closure (Info about the multicast packet)
3076 * @param neighbor_id Short ID of the neighbor to send the packet to.
3079 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3081 struct MeshData *mdata = cls;
3082 struct MeshTransmissionDescriptor *info;
3083 struct GNUNET_PeerIdentity neighbor;
3085 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3087 info->mesh_data = mdata;
3088 (*(mdata->reference_counter)) ++;
3089 info->destination = neighbor_id;
3090 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3092 GNUNET_i2s (&neighbor));
3093 info->peer = peer_info_get (&neighbor);
3094 GNUNET_assert (NULL != info->peer);
3096 GNUNET_MESSAGE_TYPE_MESH_MULTICAST,
3097 info->mesh_data->data_len,
3104 * Send a message in a tunnel in multicast, sending a copy to each child node
3105 * down the local one in the tunnel tree.
3107 * @param t Tunnel in which to send the data.
3108 * @param msg Message to be sent.
3109 * @param internal Has the service generated this message?
3112 tunnel_send_multicast (struct MeshTunnel *t,
3113 const struct GNUNET_MessageHeader *msg,
3116 struct MeshData *mdata;
3118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3119 " sending a multicast packet...\n");
3120 mdata = GNUNET_malloc (sizeof (struct MeshData));
3121 mdata->data_len = ntohs (msg->size);
3122 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
3124 mdata->data = GNUNET_malloc (mdata->data_len);
3125 memcpy (mdata->data, msg, mdata->data_len);
3126 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3128 struct GNUNET_MESH_Multicast *mcast;
3130 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3131 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3132 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3133 ntohl (mcast->ttl));
3137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3139 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
3140 && GNUNET_NO == internal)
3142 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
3144 GNUNET_SCHEDULER_add_delayed (unacknowledged_wait_time, &client_allow_send,
3146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
3150 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3151 if (*(mdata->reference_counter) == 0)
3153 GNUNET_free (mdata->data);
3154 GNUNET_free (mdata->reference_counter);
3155 if (NULL != mdata->task)
3157 GNUNET_SCHEDULER_cancel(*(mdata->task));
3158 GNUNET_free (mdata->task);
3159 GNUNET_SERVER_receive_done(t->owner->handle, GNUNET_OK);
3161 // FIXME change order?
3162 GNUNET_free (mdata);
3164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3165 " sending a multicast packet done\n");
3171 * Increase the SKIP value of all peers that
3172 * have not received a unicast message.
3174 * @param cls Closure (ID of the peer that HAS received the message).
3175 * @param key ID of the neighbor.
3176 * @param value Information about the neighbor.
3178 * @return GNUNET_YES to keep iterating.
3181 tunnel_add_skip (void *cls,
3182 const struct GNUNET_HashCode * key,
3185 struct GNUNET_PeerIdentity *neighbor = cls;
3186 struct MeshTunnelChildInfo *cinfo = value;
3188 /* TODO compare only pointers? key == neighbor? */
3189 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3200 * Iterator to get the appropiate ACK value from all children nodes.
3202 * @param cls Closue (tunnel).
3203 * @param id Id of the child node.
3206 tunnel_get_child_ack (void *cls,
3209 struct GNUNET_PeerIdentity peer_id;
3210 struct MeshTunnelChildInfo *cinfo;
3211 struct MeshTunnel *t = cls;
3214 GNUNET_PEER_resolve (id, &peer_id);
3215 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3216 &peer_id.hashPubKey);
3219 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3221 cinfo->pid = t->pid;
3222 cinfo->skip = t->pid;
3223 cinfo->max_pid = ack = t->pid + 1;
3224 GNUNET_assert (GNUNET_OK ==
3225 GNUNET_CONTAINER_multihashmap_put(t->children_fc,
3226 &peer_id.hashPubKey,
3228 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3232 ack = cinfo->max_pid;
3235 if (0 == t->max_child_ack)
3236 t->max_child_ack = ack;
3238 if (GNUNET_YES == t->speed_min)
3240 t->max_child_ack = t->max_child_ack > ack ? ack : t->max_child_ack;
3244 t->max_child_ack = t->max_child_ack > ack ? t->max_child_ack : ack;
3251 * Get the maximum PID allowed to transmit to any
3252 * tunnel child of the local peer.
3256 * @return Maximum PID allowed.
3259 tunnel_get_children_ack (struct MeshTunnel *t)
3261 t->max_child_ack = 0;
3262 tree_iterate_children (t->tree, tunnel_get_child_ack, t);
3263 return t->max_child_ack;
3268 * Get the current ack value for a tunnel, taking in account the tunnel
3269 * mode and the status of all children nodes.
3273 * @return Maximum PID allowed.
3276 tunnel_get_ack (struct MeshTunnel *t)
3279 uint32_t buffer_free;
3283 count = t->pid - t->skip;
3284 buffer_free = t->queue_max - t->queue_n;
3285 ack = count + buffer_free;
3286 child_ack = tunnel_get_children_ack (t);
3288 if (GNUNET_YES == t->speed_min)
3290 ack = child_ack > ack ? ack : child_ack;
3294 ack = child_ack > ack ? child_ack : ack;
3301 * Send an ACK informing the predecessor about the available buffer space.
3302 * If buffering is off, send only on behalf of children or self if endpoint.
3303 * If buffering is on, send when sent to children and buffer space is free.
3305 * @param t Tunnel on which to send the ACK.
3308 tunnel_send_ack (struct MeshTunnel *t, uint16_t type)
3310 struct GNUNET_MESH_ACK msg;
3311 struct GNUNET_PeerIdentity id;
3314 /* Is it after unicast / multicast retransmission? */
3315 if (GNUNET_MESSAGE_TYPE_MESH_ACK != type)
3317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ACK via DATA retransmission\n");
3318 if (GNUNET_YES == t->nobuffer)
3320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3323 if (t->queue_max > t->queue_n * 2)
3325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3330 /* Ok, ACK might be necessary, what PID to ACK? */
3331 ack = tunnel_get_ack (t);
3333 /* If speed_min and not all children have ack'd, dont send yet */
3334 if (ack == t->last_ack)
3336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, not ready\n");
3341 msg.pid = htonl (ack);
3343 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3345 msg.header.size = htons (sizeof (msg));
3346 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3347 msg.tid = htonl (t->id.tid);
3348 GNUNET_PEER_resolve(t->id.oid, &msg.oid);
3349 send_message (&msg.header, &id, t);
3354 * Send a message to all peers in this tunnel that the tunnel is no longer
3357 * @param t The tunnel whose peers to notify.
3360 tunnel_send_destroy (struct MeshTunnel *t)
3362 struct GNUNET_MESH_TunnelDestroy msg;
3364 msg.header.size = htons (sizeof (msg));
3365 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3366 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3367 msg.tid = htonl (t->id.tid);
3368 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
3373 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
3375 * @param cls Closure (Tunnel which to cancel).
3376 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
3379 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
3381 struct MeshTunnel *t = cls;
3382 struct MeshPeerInfo *peer_info;
3383 struct MeshPeerQueue *pq;
3384 struct MeshPeerQueue *next;
3386 peer_info = peer_info_get_short (neighbor_id);
3387 for (pq = peer_info->queue_head; NULL != pq; pq = next)
3390 if (pq->tunnel == t)
3392 queue_destroy (pq, GNUNET_YES);
3395 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
3397 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
3398 peer_info->core_transmit = NULL;
3403 * Destroy the tunnel and free any allocated resources linked to it.
3405 * @param t the tunnel to destroy
3407 * @return GNUNET_OK on success
3410 tunnel_destroy (struct MeshTunnel *t)
3412 struct MeshClient *c;
3413 struct GNUNET_HashCode hash;
3420 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
3426 struct GNUNET_PeerIdentity id;
3428 GNUNET_PEER_resolve (t->id.oid, &id);
3429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3430 GNUNET_i2s (&id), t->id.tid);
3432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3436 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3437 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3442 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3445 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
3449 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
3450 for (i = 0; i < t->nclients; i++)
3454 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
3459 for (i = 0; i < t->nignore; i++)
3463 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
3468 if (t->nclients > 0)
3471 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
3475 GNUNET_free (t->clients);
3477 if (NULL != t->peers)
3479 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
3481 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
3484 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
3485 &tunnel_destroy_child,
3487 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
3489 tree_destroy (t->tree);
3491 if (NULL != t->regex_ctx)
3492 regex_cancel_search (t->regex_ctx);
3493 if (NULL != t->dht_get_type)
3494 GNUNET_DHT_get_stop (t->dht_get_type);
3495 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
3496 GNUNET_SCHEDULER_cancel (t->timeout_task);
3497 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
3498 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
3501 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
3502 GNUNET_assert (0 <= n_tunnels);
3509 * Create a new tunnel
3511 * @param owner Who is the owner of the tunnel (short ID).
3512 * @param tid Tunnel Number of the tunnel.
3513 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
3514 * @param local Tunnel Number for the tunnel, for the client point of view.
3516 * @return A new initialized tunnel. NULL on error.
3518 static struct MeshTunnel *
3519 tunnel_new (GNUNET_PEER_Id owner,
3520 MESH_TunnelNumber tid,
3521 struct MeshClient *client,
3522 MESH_TunnelNumber local)
3524 struct MeshTunnel *t;
3525 struct GNUNET_HashCode hash;
3527 if (n_tunnels >= max_tunnels && NULL == client)
3530 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3533 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
3534 t->tree = tree_new (owner);
3536 t->local_tid = local;
3537 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8);
3539 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
3541 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3543 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3544 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3549 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3555 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3557 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
3558 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3562 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3572 * Removes an explicit path from a tunnel, freeing all intermediate nodes
3573 * that are no longer needed, as well as nodes of no longer reachable peers.
3574 * The tunnel itself is also destoyed if results in a remote empty tunnel.
3576 * @param t Tunnel from which to remove the path.
3577 * @param peer Short id of the peer which should be removed.
3580 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
3582 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
3588 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
3589 * client when the client disconnects. If the client is not the owner, the
3590 * owner will get notified if no more clients are in the tunnel and the client
3591 * get removed from the tunnel's list.
3593 * @param cls closure (client that is disconnecting)
3594 * @param key the hash of the local tunnel id (used to access the hashmap)
3595 * @param value the value stored at the key (tunnel to destroy)
3597 * @return GNUNET_OK on success
3600 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
3602 struct MeshTunnel *t = value;
3603 struct MeshClient *c = cls;
3606 send_client_tunnel_disconnect(t, c);
3609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3610 "Client %u is destination, keeping the tunnel alive.\n", c->id);
3611 tunnel_delete_client(t, c);
3612 client_delete_tunnel(c, t);
3615 tunnel_send_destroy(t);
3616 r = tunnel_destroy (t);
3622 * Timeout function, destroys tunnel if called
3624 * @param cls Closure (tunnel to destroy).
3625 * @param tc TaskContext
3628 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3630 struct MeshTunnel *t = cls;
3632 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3634 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3639 * Resets the tunnel timeout. Starts it if no timeout was running.
3641 * @param t Tunnel whose timeout to reset.
3644 tunnel_reset_timeout (struct MeshTunnel *t)
3646 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
3647 GNUNET_SCHEDULER_cancel (t->timeout_task);
3649 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3650 (refresh_path_time, 4), &tunnel_timeout, t);
3654 /******************************************************************************/
3655 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3656 /******************************************************************************/
3659 * Function to send a create path packet to a peer.
3661 * @param cls closure
3662 * @param size number of bytes available in buf
3663 * @param buf where the callee should write the message
3664 * @return number of bytes written to buf
3667 send_core_path_create (void *cls, size_t size, void *buf)
3669 struct MeshPathInfo *info = cls;
3670 struct GNUNET_MESH_ManipulatePath *msg;
3671 struct GNUNET_PeerIdentity *peer_ptr;
3672 struct MeshTunnel *t = info->t;
3673 struct MeshPeerPath *p = info->path;
3678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
3680 sizeof (struct GNUNET_MESH_ManipulatePath) +
3681 p->length * sizeof (struct GNUNET_PeerIdentity);
3683 if (size < size_needed || NULL == buf)
3688 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
3689 msg->header.size = htons (size_needed);
3690 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
3691 msg->tid = ntohl (t->id.tid);
3693 if (GNUNET_YES == t->speed_min)
3694 opt = MESH_TUNNEL_OPT_SPEED_MIN;
3695 if (GNUNET_YES == t->nobuffer)
3696 opt |= MESH_TUNNEL_OPT_NOBUFFER;
3697 msg->opt = htonl(opt);
3699 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
3700 for (i = 0; i < p->length; i++)
3702 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
3708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3709 "CREATE PATH (%u bytes long) sent!\n", size_needed);
3715 * Fill the core buffer
3717 * @param cls closure (data itself)
3718 * @param size number of bytes available in buf
3719 * @param buf where the callee should write the message
3721 * @return number of bytes written to buf
3724 send_core_data_multicast (void *cls, size_t size, void *buf)
3726 struct MeshTransmissionDescriptor *info = cls;
3729 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
3730 GNUNET_assert (NULL != info);
3731 GNUNET_assert (NULL != info->peer);
3732 total_size = info->mesh_data->data_len;
3733 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
3735 if (total_size > size)
3740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
3741 memcpy (buf, info->mesh_data->data, total_size);
3744 struct GNUNET_MESH_Multicast *mc;
3745 struct GNUNET_MessageHeader *mh;
3748 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3750 mc = (struct GNUNET_MESH_Multicast *) mh;
3751 mh = (struct GNUNET_MessageHeader *) &mc[1];
3752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3753 " multicast, payload type %u\n", ntohs (mh->type));
3754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3755 " multicast, payload size %u\n", ntohs (mh->size));
3759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %u\n",
3764 data_descriptor_decrement_rc (info->mesh_data);
3765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
3767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
3773 * Creates a path ack message in buf and frees all unused resources.
3775 * @param cls closure (MeshTransmissionDescriptor)
3776 * @param size number of bytes available in buf
3777 * @param buf where the callee should write the message
3778 * @return number of bytes written to buf
3781 send_core_path_ack (void *cls, size_t size, void *buf)
3783 struct MeshTransmissionDescriptor *info = cls;
3784 struct GNUNET_MESH_PathACK *msg = buf;
3786 GNUNET_assert (NULL != info);
3787 if (sizeof (struct GNUNET_MESH_PathACK) > size)
3792 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
3793 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3794 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
3795 msg->tid = htonl (info->origin->tid);
3796 msg->peer_id = my_full_id;
3799 /* TODO add signature */
3801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
3802 return sizeof (struct GNUNET_MESH_PathACK);
3807 * Free a transmission that was already queued with all resources
3808 * associated to the request.
3810 * @param queue Queue handler to cancel.
3811 * @param clear_cls Is it necessary to free associated cls?
3814 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3816 struct MeshTransmissionDescriptor *dd;
3817 struct MeshPathInfo *path_info;
3819 if (GNUNET_YES == clear_cls)
3821 switch (queue->type)
3823 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3824 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3825 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
3828 data_descriptor_decrement_rc (dd->mesh_data);
3830 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3832 path_info = queue->cls;
3833 path_destroy (path_info->path);
3837 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
3839 GNUNET_free_non_null (queue->cls);
3841 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3842 queue->peer->queue_tail,
3844 GNUNET_free (queue);
3849 * Core callback to write a queued packet to core buffer
3851 * @param cls Closure (peer info).
3852 * @param size Number of bytes available in buf.
3853 * @param buf Where the to write the message.
3855 * @return number of bytes written to buf
3858 queue_send (void *cls, size_t size, void *buf)
3860 struct MeshPeerInfo *peer = cls;
3861 struct GNUNET_MessageHeader *msg;
3862 struct MeshPeerQueue *queue;
3863 struct MeshTunnel *t;
3866 peer->core_transmit = NULL;
3867 queue = peer->queue_head;
3869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
3871 /* If queue is empty, send should have been cancelled */
3877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
3879 /* Check if buffer size is enough for the message */
3880 if (queue->size > size)
3882 struct GNUNET_PeerIdentity id;
3884 GNUNET_PEER_resolve (peer->id, &id);
3885 peer->core_transmit =
3886 GNUNET_CORE_notify_transmit_ready(core_handle,
3889 GNUNET_TIME_UNIT_FOREVER_REL,
3896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
3902 switch (queue->type)
3905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* raw\n");
3906 data_size = send_core_data_raw (queue->cls, size, buf);
3907 msg = (struct GNUNET_MessageHeader *) buf;
3908 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_UNICAST)
3909 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3911 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
3913 data_size = send_core_data_multicast(queue->cls, size, buf);
3914 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3916 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3917 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
3918 data_size = send_core_path_create(queue->cls, size, buf);
3920 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
3922 data_size = send_core_path_ack(queue->cls, size, buf);
3926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* type unknown\n");
3930 /* Free queue, but cls was freed by send_core_* */
3931 queue_destroy (queue, GNUNET_NO);
3933 if (GNUNET_YES == t->destroy && 0 == t->queue_n)
3935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
3939 /* If more data in queue, send next */
3940 if (NULL != peer->queue_head)
3942 struct GNUNET_PeerIdentity id;
3944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
3945 GNUNET_PEER_resolve (peer->id, &id);
3946 peer->core_transmit =
3947 GNUNET_CORE_notify_transmit_ready(core_handle,
3950 GNUNET_TIME_UNIT_FOREVER_REL,
3952 peer->queue_head->size,
3956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
3962 * Queue and pass message to core when possible.
3964 * @param cls Closure (type dependant).
3965 * @param type Type of the message, 0 for a raw message.
3966 * @param size Size of the message.
3967 * @param dst Neighbor to send message to.
3968 * @param t Tunnel this message belongs to.
3971 queue_add (void *cls, uint16_t type, size_t size,
3972 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3974 struct MeshPeerQueue *queue;
3976 if (t->queue_n >= t->queue_max)
3978 if (NULL == t->owner)
3979 GNUNET_break_op(0); // TODO: kill connection?
3982 return; // Drop message
3985 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3991 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3992 if (NULL == dst->core_transmit)
3994 struct GNUNET_PeerIdentity id;
3996 GNUNET_PEER_resolve (dst->id, &id);
3997 dst->core_transmit =
3998 GNUNET_CORE_notify_transmit_ready(core_handle,
4001 GNUNET_TIME_UNIT_FOREVER_REL,
4010 /******************************************************************************/
4011 /******************** MESH NETWORK HANDLERS **************************/
4012 /******************************************************************************/
4016 * Core handler for path creation
4018 * @param cls closure
4019 * @param message message
4020 * @param peer peer identity this notification is about
4021 * @param atsi performance data
4022 * @param atsi_count number of records in 'atsi'
4024 * @return GNUNET_OK to keep the connection open,
4025 * GNUNET_SYSERR to close it (signal serious error)
4028 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
4029 const struct GNUNET_MessageHeader *message,
4030 const struct GNUNET_ATS_Information *atsi,
4031 unsigned int atsi_count)
4033 unsigned int own_pos;
4036 MESH_TunnelNumber tid;
4037 struct GNUNET_MESH_ManipulatePath *msg;
4038 struct GNUNET_PeerIdentity *pi;
4039 struct GNUNET_HashCode hash;
4040 struct MeshPeerPath *path;
4041 struct MeshPeerInfo *dest_peer_info;
4042 struct MeshPeerInfo *orig_peer_info;
4043 struct MeshTunnel *t;
4045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4046 "Received a path create msg [%s]\n",
4047 GNUNET_i2s (&my_full_id));
4048 size = ntohs (message->size);
4049 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4051 GNUNET_break_op (0);
4055 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4056 if (size % sizeof (struct GNUNET_PeerIdentity))
4058 GNUNET_break_op (0);
4061 size /= sizeof (struct GNUNET_PeerIdentity);
4064 GNUNET_break_op (0);
4067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4068 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4070 tid = ntohl (msg->tid);
4071 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4073 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
4074 t = tunnel_get (pi, tid);
4075 if (NULL == t) // FIXME only for INCOMING tunnels?
4079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
4080 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
4083 // FIXME notify failure
4086 opt = ntohl (msg->opt);
4087 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
4088 GNUNET_YES : GNUNET_NO;
4089 t->nobuffer = (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER)) ?
4090 GNUNET_YES : GNUNET_NO;
4092 if (GNUNET_YES == t->nobuffer)
4095 while (NULL != tunnel_get_incoming (next_local_tid))
4096 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4097 t->local_tid_dest = next_local_tid++;
4098 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4100 tunnel_reset_timeout (t);
4101 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4103 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
4104 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
4112 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
4113 if (NULL == dest_peer_info)
4115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4116 " Creating PeerInfo for destination.\n");
4117 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4118 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
4119 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
4121 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4123 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
4124 if (NULL == orig_peer_info)
4126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4127 " Creating PeerInfo for origin.\n");
4128 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4129 orig_peer_info->id = GNUNET_PEER_intern (pi);
4130 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
4131 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4134 path = path_new (size);
4136 for (i = 0; i < size; i++)
4138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4139 GNUNET_i2s (&pi[i]));
4140 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4141 if (path->peers[i] == myid)
4144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4147 /* cannot be self, must be 'not found' */
4148 /* create path: self not found in path through self */
4149 GNUNET_break_op (0);
4150 path_destroy (path);
4151 /* FIXME error. destroy tunnel? leave for timeout? */
4154 path_add_to_peers (path, GNUNET_NO);
4155 tunnel_add_path (t, path, own_pos);
4156 if (own_pos == size - 1)
4158 /* It is for us! Send ack. */
4159 struct MeshTransmissionDescriptor *info;
4161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4162 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4163 if (NULL == t->peers)
4165 /* New tunnel! Notify clients on data. */
4166 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
4168 GNUNET_break (GNUNET_SYSERR !=
4169 GNUNET_CONTAINER_multihashmap_put (t->peers,
4170 &my_full_id.hashPubKey,
4173 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
4174 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
4175 info->origin = &t->id;
4176 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4177 GNUNET_assert (NULL != info->peer);
4179 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4180 sizeof (struct GNUNET_MESH_PathACK),
4186 struct MeshPeerPath *path2;
4188 /* It's for somebody else! Retransmit. */
4189 path2 = path_duplicate (path);
4190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4191 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4192 path2 = path_duplicate (path);
4193 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
4194 send_create_path (dest_peer_info, path, t);
4201 * Core handler for path destruction
4203 * @param cls closure
4204 * @param message message
4205 * @param peer peer identity this notification is about
4206 * @param atsi performance data
4207 * @param atsi_count number of records in 'atsi'
4209 * @return GNUNET_OK to keep the connection open,
4210 * GNUNET_SYSERR to close it (signal serious error)
4213 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4214 const struct GNUNET_MessageHeader *message,
4215 const struct GNUNET_ATS_Information *atsi,
4216 unsigned int atsi_count)
4218 struct GNUNET_MESH_ManipulatePath *msg;
4219 struct GNUNET_PeerIdentity *pi;
4220 struct MeshPeerPath *path;
4221 struct MeshTunnel *t;
4222 unsigned int own_pos;
4226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4227 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
4228 size = ntohs (message->size);
4229 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4231 GNUNET_break_op (0);
4235 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4236 if (size % sizeof (struct GNUNET_PeerIdentity))
4238 GNUNET_break_op (0);
4241 size /= sizeof (struct GNUNET_PeerIdentity);
4244 GNUNET_break_op (0);
4247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4249 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4250 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4252 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
4254 t = tunnel_get (pi, ntohl (msg->tid));
4257 /* TODO notify back: we don't know this tunnel */
4258 GNUNET_break_op (0);
4261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4262 path = path_new (size);
4264 for (i = 0; i < size; i++)
4266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4267 GNUNET_i2s (&pi[i]));
4268 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4269 if (path->peers[i] == myid)
4272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4273 if (own_pos < path->length - 1)
4274 send_message (message, &pi[own_pos + 1], t);
4276 send_client_tunnel_disconnect(t, NULL);
4278 tunnel_delete_peer (t, path->peers[path->length - 1]);
4279 path_destroy (path);
4285 * Core handler for notifications of broken paths
4287 * @param cls closure
4288 * @param message message
4289 * @param peer peer identity this notification is about
4290 * @param atsi performance data
4291 * @param atsi_count number of records in 'atsi'
4293 * @return GNUNET_OK to keep the connection open,
4294 * GNUNET_SYSERR to close it (signal serious error)
4297 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4298 const struct GNUNET_MessageHeader *message,
4299 const struct GNUNET_ATS_Information *atsi,
4300 unsigned int atsi_count)
4302 struct GNUNET_MESH_PathBroken *msg;
4303 struct MeshTunnel *t;
4305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4306 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4307 msg = (struct GNUNET_MESH_PathBroken *) message;
4308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4309 GNUNET_i2s (&msg->peer1));
4310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4311 GNUNET_i2s (&msg->peer2));
4312 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4315 GNUNET_break_op (0);
4318 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4319 GNUNET_PEER_search (&msg->peer2));
4326 * Core handler for tunnel destruction
4328 * @param cls closure
4329 * @param message message
4330 * @param peer peer identity this notification is about
4331 * @param atsi performance data
4332 * @param atsi_count number of records in 'atsi'
4334 * @return GNUNET_OK to keep the connection open,
4335 * GNUNET_SYSERR to close it (signal serious error)
4338 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4339 const struct GNUNET_MessageHeader *message,
4340 const struct GNUNET_ATS_Information *atsi,
4341 unsigned int atsi_count)
4343 struct GNUNET_MESH_TunnelDestroy *msg;
4344 struct MeshTunnel *t;
4346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4347 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
4348 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4349 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
4350 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4351 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4354 /* Probably already got the message from another path,
4355 * destroyed the tunnel and retransmitted to children.
4358 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4361 if (t->id.oid == myid)
4363 GNUNET_break_op (0);
4366 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4368 /* Tunnel was incoming, notify clients */
4369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4370 t->local_tid, t->local_tid_dest);
4371 send_clients_tunnel_destroy (t);
4373 tunnel_send_destroy (t);
4374 t->destroy = GNUNET_YES;
4375 // TODO: add timeout to destroy the tunnel anyway
4381 * Core handler for mesh network traffic going from the origin to a peer
4383 * @param cls closure
4384 * @param peer peer identity this notification is about
4385 * @param message message
4386 * @param atsi performance data
4387 * @param atsi_count number of records in 'atsi'
4388 * @return GNUNET_OK to keep the connection open,
4389 * GNUNET_SYSERR to close it (signal serious error)
4392 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4393 const struct GNUNET_MessageHeader *message,
4394 const struct GNUNET_ATS_Information *atsi,
4395 unsigned int atsi_count)
4397 struct GNUNET_MESH_Unicast *msg;
4398 struct GNUNET_PeerIdentity *neighbor;
4399 struct MeshTunnelChildInfo *cinfo;
4400 struct MeshTunnel *t;
4401 GNUNET_PEER_Id dest_id;
4406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
4408 size = ntohs (message->size);
4410 sizeof (struct GNUNET_MESH_Unicast) +
4411 sizeof (struct GNUNET_MessageHeader))
4416 msg = (struct GNUNET_MESH_Unicast *) message;
4417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4418 ntohs (msg[1].header.type));
4419 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4422 /* TODO notify back: we don't know this tunnel */
4423 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4424 GNUNET_break_op (0);
4427 pid = ntohl (msg->pid);
4430 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4431 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4432 " Already seen pid %u, DROPPING!\n", pid);
4437 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4438 " pid %u not seen yet, forwarding\n", pid);
4440 t->skip += (pid - t->pid) - 1;
4442 tunnel_reset_timeout (t);
4443 dest_id = GNUNET_PEER_search (&msg->destination);
4444 if (dest_id == myid)
4446 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4447 " it's for us! sending to clients...\n");
4448 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
4449 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
4450 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK); // FIXME send after client processes the packet
4453 ttl = ntohl (msg->ttl);
4454 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4457 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4458 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4462 " not for us, retransmitting...\n");
4463 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4465 neighbor = tree_get_first_hop (t->tree, dest_id);
4466 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
4467 &neighbor->hashPubKey);
4470 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
4471 cinfo->id = GNUNET_PEER_intern (neighbor);
4473 cinfo->max_pid = pid + t->queue_max - t->queue_n; // FIXME review
4475 GNUNET_assert (GNUNET_OK ==
4476 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
4477 &neighbor->hashPubKey,
4479 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
4482 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4485 send_message (message, neighbor, t);
4491 * Core handler for mesh network traffic going from the origin to all peers
4493 * @param cls closure
4494 * @param message message
4495 * @param peer peer identity this notification is about
4496 * @param atsi performance data
4497 * @param atsi_count number of records in 'atsi'
4498 * @return GNUNET_OK to keep the connection open,
4499 * GNUNET_SYSERR to close it (signal serious error)
4501 * TODO: Check who we got this from, to validate route.
4504 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4505 const struct GNUNET_MessageHeader *message,
4506 const struct GNUNET_ATS_Information *atsi,
4507 unsigned int atsi_count)
4509 struct GNUNET_MESH_Multicast *msg;
4510 struct MeshTunnel *t;
4514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
4516 size = ntohs (message->size);
4517 if (sizeof (struct GNUNET_MESH_Multicast) +
4518 sizeof (struct GNUNET_MessageHeader) > size)
4520 GNUNET_break_op (0);
4523 msg = (struct GNUNET_MESH_Multicast *) message;
4524 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4528 /* TODO notify that we dont know that tunnel */
4529 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4530 GNUNET_break_op (0);
4533 pid = ntohl (msg->pid);
4536 /* already seen this packet, drop */
4537 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4538 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4539 " Already seen pid %u, DROPPING!\n", pid);
4544 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4545 " pid %u not seen yet, forwarding\n", pid);
4547 t->skip += (pid - t->pid) - 1;
4549 tunnel_reset_timeout (t);
4551 /* Transmit to locally interested clients */
4552 if (NULL != t->peers &&
4553 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
4555 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
4556 send_subscribed_clients (message, &msg[1].header);
4558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
4559 if (ntohl (msg->ttl) == 0)
4561 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4562 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4565 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
4566 tunnel_send_multicast (t, message, GNUNET_NO);
4572 * Core handler for mesh network traffic toward the owner of a tunnel
4574 * @param cls closure
4575 * @param message message
4576 * @param peer peer identity this notification is about
4577 * @param atsi performance data
4578 * @param atsi_count number of records in 'atsi'
4580 * @return GNUNET_OK to keep the connection open,
4581 * GNUNET_SYSERR to close it (signal serious error)
4584 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4585 const struct GNUNET_MessageHeader *message,
4586 const struct GNUNET_ATS_Information *atsi,
4587 unsigned int atsi_count)
4589 struct GNUNET_MESH_ToOrigin *msg;
4590 struct GNUNET_PeerIdentity id;
4591 struct MeshPeerInfo *peer_info;
4592 struct MeshTunnel *t;
4595 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
4597 size = ntohs (message->size);
4598 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
4599 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
4601 GNUNET_break_op (0);
4604 msg = (struct GNUNET_MESH_ToOrigin *) message;
4605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4606 ntohs (msg[1].header.type));
4607 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4611 /* TODO notify that we dont know this tunnel (whom)? */
4612 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4613 GNUNET_break_op (0);
4617 if (t->id.oid == myid)
4620 struct GNUNET_MESH_ToOrigin *copy;
4622 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4623 " it's for us! sending to clients...\n");
4624 if (NULL == t->owner)
4626 /* got data packet for ownerless tunnel */
4627 GNUNET_STATISTICS_update (stats, "# data on ownerless tunnel",
4629 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no clients!\n");
4630 GNUNET_break_op (0);
4633 /* TODO signature verification */
4634 memcpy (cbuf, message, size);
4635 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
4636 copy->tid = htonl (t->local_tid);
4637 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
4638 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
4639 ©->header, GNUNET_YES);
4642 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4643 " not for us, retransmitting...\n");
4645 peer_info = peer_info_get (&msg->oid);
4646 if (NULL == peer_info)
4648 /* unknown origin of tunnel */
4652 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4653 send_message (message, &id, t);
4654 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
4661 * Core handler for mesh network traffic point-to-point acks.
4663 * @param cls closure
4664 * @param message message
4665 * @param peer peer identity this notification is about
4666 * @param atsi performance data
4667 * @param atsi_count number of records in 'atsi'
4669 * @return GNUNET_OK to keep the connection open,
4670 * GNUNET_SYSERR to close it (signal serious error)
4673 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4674 const struct GNUNET_MessageHeader *message,
4675 const struct GNUNET_ATS_Information *atsi,
4676 unsigned int atsi_count)
4678 struct GNUNET_MESH_ACK *msg;
4679 struct MeshTunnelChildInfo *cinfo;
4680 struct MeshTunnel *t;
4683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got an ACK packet from %s\n",
4685 msg = (struct GNUNET_MESH_ACK *) message;
4686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4687 ntohs (msg[1].header.type));
4688 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4692 /* TODO notify that we dont know this tunnel (whom)? */
4693 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4694 GNUNET_break_op (0);
4697 ack = ntohl (msg->pid);
4698 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
4702 GNUNET_break_op (0);
4705 cinfo->max_pid = ack;
4706 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4712 * Core handler for path ACKs
4714 * @param cls closure
4715 * @param message message
4716 * @param peer peer identity this notification is about
4717 * @param atsi performance data
4718 * @param atsi_count number of records in 'atsi'
4720 * @return GNUNET_OK to keep the connection open,
4721 * GNUNET_SYSERR to close it (signal serious error)
4724 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4725 const struct GNUNET_MessageHeader *message,
4726 const struct GNUNET_ATS_Information *atsi,
4727 unsigned int atsi_count)
4729 struct GNUNET_MESH_PathACK *msg;
4730 struct GNUNET_PeerIdentity id;
4731 struct MeshPeerInfo *peer_info;
4732 struct MeshPeerPath *p;
4733 struct MeshTunnel *t;
4735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4736 GNUNET_i2s (&my_full_id));
4737 msg = (struct GNUNET_MESH_PathACK *) message;
4738 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4741 /* TODO notify that we don't know the tunnel */
4742 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4744 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4748 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4750 peer_info = peer_info_get (&msg->peer_id);
4751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4752 GNUNET_i2s (&msg->peer_id));
4753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4756 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
4758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4759 "connect_by_string completed, stopping search\n");
4760 regex_cancel_search (t->regex_ctx);
4761 t->regex_ctx = NULL;
4764 /* Add paths to peers? */
4765 p = tree_get_path_to_peer (t->tree, peer_info->id);
4768 path_add_to_peers (p, GNUNET_YES);
4776 /* Message for us? */
4777 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4780 if (NULL == t->owner)
4782 GNUNET_break_op (0);
4785 if (NULL != t->dht_get_type)
4787 GNUNET_DHT_get_stop (t->dht_get_type);
4788 t->dht_get_type = NULL;
4790 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
4792 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
4793 send_client_peer_connected (t, peer_info->id);
4798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4799 " not for us, retransmitting...\n");
4800 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4801 peer_info = peer_info_get (&msg->oid);
4802 if (NULL == peer_info)
4804 /* If we know the tunnel, we should DEFINITELY know the peer */
4808 send_message (message, &id, t);
4814 * Functions to handle messages from core
4816 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4817 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4818 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
4819 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4820 sizeof (struct GNUNET_MESH_PathBroken)},
4821 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4822 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4823 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4824 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4825 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4826 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4827 sizeof (struct GNUNET_MESH_ACK)},
4828 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4829 sizeof (struct GNUNET_MESH_PathACK)},
4835 /******************************************************************************/
4836 /**************** MESH LOCAL HANDLER HELPERS ***********************/
4837 /******************************************************************************/
4840 * deregister_app: iterator for removing each application registered by a client
4842 * @param cls closure
4843 * @param key the hash of the application id (used to access the hashmap)
4844 * @param value the value stored at the key (client)
4846 * @return GNUNET_OK on success
4849 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
4851 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
4852 GNUNET_break (GNUNET_YES ==
4853 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
4859 * notify_client_connection_failure: notify a client that the connection to the
4860 * requested remote peer is not possible (for instance, no route found)
4861 * Function called when the socket is ready to queue more data. "buf" will be
4862 * NULL and "size" zero if the socket was closed for writing in the meantime.
4864 * @param cls closure
4865 * @param size number of bytes available in buf
4866 * @param buf where the callee should write the message
4867 * @return number of bytes written to buf
4870 notify_client_connection_failure (void *cls, size_t size, void *buf)
4873 struct MeshPeerInfo *peer_info;
4874 struct GNUNET_MESH_PeerControl *msg;
4875 struct GNUNET_PeerIdentity id;
4877 if (0 == size && NULL == buf)
4879 // TODO retry? cancel?
4883 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
4884 peer_info = (struct MeshPeerInfo *) cls;
4885 msg = (struct GNUNET_MESH_PeerControl *) buf;
4886 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
4887 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
4888 // msg->tunnel_id = htonl(peer_info->t->tid);
4889 GNUNET_PEER_resolve (peer_info->id, &id);
4890 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
4898 * Send keepalive packets for a peer
4900 * @param cls Closure (tunnel for which to send the keepalive).
4901 * @param tc Notification context.
4903 * TODO: implement explicit multicast keepalive?
4906 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4908 struct MeshTunnel *t = cls;
4909 struct GNUNET_MessageHeader *payload;
4910 struct GNUNET_MESH_Multicast *msg;
4912 sizeof (struct GNUNET_MESH_Multicast) +
4913 sizeof (struct GNUNET_MessageHeader);
4916 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4920 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
4922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4923 "sending keepalive for tunnel %d\n", t->id.tid);
4925 msg = (struct GNUNET_MESH_Multicast *) cbuf;
4926 msg->header.size = htons (size);
4927 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
4928 msg->oid = my_full_id;
4929 msg->tid = htonl (t->id.tid);
4930 msg->ttl = htonl (default_ttl);
4931 msg->pid = htonl (t->pid + 1);
4933 payload = (struct GNUNET_MessageHeader *) &msg[1];
4934 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
4935 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
4936 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
4938 t->path_refresh_task =
4939 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
4945 * Function to process paths received for a new peer addition. The recorded
4946 * paths form the initial tunnel, which can be optimized later.
4947 * Called on each result obtained for the DHT search.
4949 * @param cls closure
4950 * @param exp when will this value expire
4951 * @param key key of the result
4952 * @param get_path path of the get request
4953 * @param get_path_length lenght of get_path
4954 * @param put_path path of the put request
4955 * @param put_path_length length of the put_path
4956 * @param type type of the result
4957 * @param size number of bytes in data
4958 * @param data pointer to the result data
4960 * TODO: re-issue the request after certain time? cancel after X results?
4963 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4964 const struct GNUNET_HashCode * key,
4965 const struct GNUNET_PeerIdentity *get_path,
4966 unsigned int get_path_length,
4967 const struct GNUNET_PeerIdentity *put_path,
4968 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4969 size_t size, const void *data)
4971 struct MeshPathInfo *path_info = cls;
4972 struct MeshPeerPath *p;
4973 struct GNUNET_PeerIdentity pi;
4976 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4977 GNUNET_PEER_resolve (path_info->peer->id, &pi);
4978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4980 p = path_build_from_dht (get_path, get_path_length, put_path,
4982 path_add_to_peers (p, GNUNET_NO);
4984 for (i = 0; i < path_info->peer->ntunnels; i++)
4986 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
4987 peer_info_connect (path_info->peer, path_info->t);
4995 * Function to process paths received for a new peer addition. The recorded
4996 * paths form the initial tunnel, which can be optimized later.
4997 * Called on each result obtained for the DHT search.
4999 * @param cls closure
5000 * @param exp when will this value expire
5001 * @param key key of the result
5002 * @param get_path path of the get request
5003 * @param get_path_length lenght of get_path
5004 * @param put_path path of the put request
5005 * @param put_path_length length of the put_path
5006 * @param type type of the result
5007 * @param size number of bytes in data
5008 * @param data pointer to the result data
5011 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5012 const struct GNUNET_HashCode * key,
5013 const struct GNUNET_PeerIdentity *get_path,
5014 unsigned int get_path_length,
5015 const struct GNUNET_PeerIdentity *put_path,
5016 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5017 size_t size, const void *data)
5019 const struct PBlock *pb = data;
5020 const struct GNUNET_PeerIdentity *pi = &pb->id;
5021 struct MeshTunnel *t = cls;
5022 struct MeshPeerInfo *peer_info;
5023 struct MeshPeerPath *p;
5025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
5026 if (size != sizeof (struct PBlock))
5028 GNUNET_break_op (0);
5031 if (ntohl(pb->type) != t->type)
5033 GNUNET_break_op (0);
5036 GNUNET_assert (NULL != t->owner);
5037 peer_info = peer_info_get (pi);
5038 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
5040 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
5042 p = path_build_from_dht (get_path, get_path_length, put_path,
5044 path_add_to_peers (p, GNUNET_NO);
5046 tunnel_add_peer (t, peer_info);
5047 peer_info_connect (peer_info, t);
5052 * Function to process DHT string to regex matching.
5053 * Called on each result obtained for the DHT search.
5055 * @param cls closure (search context)
5056 * @param exp when will this value expire
5057 * @param key key of the result
5058 * @param get_path path of the get request (not used)
5059 * @param get_path_length lenght of get_path (not used)
5060 * @param put_path path of the put request (not used)
5061 * @param put_path_length length of the put_path (not used)
5062 * @param type type of the result
5063 * @param size number of bytes in data
5064 * @param data pointer to the result data
5067 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5068 const struct GNUNET_HashCode * key,
5069 const struct GNUNET_PeerIdentity *get_path,
5070 unsigned int get_path_length,
5071 const struct GNUNET_PeerIdentity *put_path,
5072 unsigned int put_path_length,
5073 enum GNUNET_BLOCK_Type type,
5074 size_t size, const void *data)
5076 const struct MeshRegexAccept *block = data;
5077 struct MeshRegexSearchContext *ctx = cls;
5078 struct MeshRegexSearchInfo *info = ctx->info;
5079 struct MeshPeerPath *p;
5080 struct MeshPeerInfo *peer_info;
5082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
5083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
5085 peer_info = peer_info_get(&block->id);
5086 p = path_build_from_dht (get_path, get_path_length, put_path,
5088 path_add_to_peers (p, GNUNET_NO);
5091 tunnel_add_peer (info->t, peer_info);
5092 peer_info_connect (peer_info, info->t);
5093 if (0 == info->peer)
5095 info->peer = peer_info->id;
5099 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
5102 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
5103 ®ex_connect_timeout,
5111 * Function to process DHT string to regex matching.
5112 * Called on each result obtained for the DHT search.
5114 * @param cls closure (search context)
5115 * @param exp when will this value expire
5116 * @param key key of the result
5117 * @param get_path path of the get request (not used)
5118 * @param get_path_length lenght of get_path (not used)
5119 * @param put_path path of the put request (not used)
5120 * @param put_path_length length of the put_path (not used)
5121 * @param type type of the result
5122 * @param size number of bytes in data
5123 * @param data pointer to the result data
5125 * TODO: re-issue the request after certain time? cancel after X results?
5128 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5129 const struct GNUNET_HashCode * key,
5130 const struct GNUNET_PeerIdentity *get_path,
5131 unsigned int get_path_length,
5132 const struct GNUNET_PeerIdentity *put_path,
5133 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5134 size_t size, const void *data)
5136 const struct MeshRegexBlock *block = data;
5137 struct MeshRegexSearchContext *ctx = cls;
5138 struct MeshRegexSearchInfo *info = ctx->info;
5142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5143 "DHT GET STRING RETURNED RESULTS\n");
5144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5145 " key: %s\n", GNUNET_h2s (key));
5147 copy = GNUNET_malloc (size);
5148 memcpy (copy, data, size);
5149 GNUNET_break (GNUNET_OK ==
5150 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
5151 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
5152 len = ntohl (block->n_proof);
5154 char proof[len + 1];
5156 memcpy (proof, &block[1], len);
5158 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
5160 GNUNET_break_op (0);
5164 len = strlen (info->description);
5165 if (len == ctx->position) // String processed
5167 if (GNUNET_YES == ntohl (block->accepting))
5169 regex_find_path(key, ctx);
5173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
5174 // FIXME REGEX this block not successful, wait for more? start timeout?
5178 GNUNET_break (GNUNET_OK ==
5179 GNUNET_MESH_regex_block_iterate (block, size,
5180 ®ex_edge_iterator, ctx));
5184 /******************************************************************************/
5185 /********************* MESH LOCAL HANDLES **************************/
5186 /******************************************************************************/
5190 * Handler for client disconnection
5192 * @param cls closure
5193 * @param client identification of the client; NULL
5194 * for the last call when the server is destroyed
5197 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
5199 struct MeshClient *c;
5200 struct MeshClient *next;
5203 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
5206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
5212 if (c->handle != client)
5214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
5218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
5220 GNUNET_SERVER_client_drop (c->handle);
5221 c->shutting_down = GNUNET_YES;
5222 GNUNET_assert (NULL != c->own_tunnels);
5223 GNUNET_assert (NULL != c->incoming_tunnels);
5224 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
5225 &tunnel_destroy_iterator, c);
5226 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
5227 &tunnel_destroy_iterator, c);
5228 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
5229 &tunnel_destroy_iterator, c);
5230 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
5231 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
5232 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
5234 /* deregister clients applications */
5235 if (NULL != c->apps)
5237 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
5238 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
5240 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
5241 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
5243 GNUNET_SCHEDULER_cancel (announce_applications_task);
5244 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
5246 if (NULL != c->types)
5247 GNUNET_CONTAINER_multihashmap_destroy (c->types);
5248 for (i = 0; i < c->n_regex; i++)
5250 GNUNET_free (c->regexes[i]);
5252 GNUNET_free_non_null (c->regexes);
5253 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
5254 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
5256 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
5257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
5259 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
5262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
5268 * Handler for new clients
5270 * @param cls closure
5271 * @param client identification of the client
5272 * @param message the actual message, which includes messages the client wants
5275 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
5276 const struct GNUNET_MessageHeader *message)
5278 struct GNUNET_MESH_ClientConnect *cc_msg;
5279 struct MeshClient *c;
5280 GNUNET_MESH_ApplicationType *a;
5287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
5288 /* Check data sanity */
5289 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
5290 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
5291 ntypes = ntohs (cc_msg->types);
5292 napps = ntohs (cc_msg->applications);
5294 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
5297 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5301 /* Create new client structure */
5302 c = GNUNET_malloc (sizeof (struct MeshClient));
5303 c->id = next_client_id++;
5304 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
5306 GNUNET_SERVER_client_keep (client);
5307 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
5310 GNUNET_MESH_ApplicationType at;
5311 struct GNUNET_HashCode hc;
5313 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
5314 for (i = 0; i < napps; i++)
5317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
5318 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
5319 /* store in clients hashmap */
5320 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
5321 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5322 /* store in global hashmap, for announcements */
5323 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
5324 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5326 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
5327 announce_applications_task =
5328 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
5334 struct GNUNET_HashCode hc;
5336 t = (uint16_t *) & a[napps];
5337 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
5338 for (i = 0; i < ntypes; i++)
5341 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
5342 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
5344 /* store in clients hashmap */
5345 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
5346 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5347 /* store in global hashmap */
5348 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
5349 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5353 " client has %u+%u subscriptions\n", napps, ntypes);
5355 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
5356 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5357 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5358 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5359 GNUNET_SERVER_notification_context_add (nc, client);
5360 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
5362 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
5368 * Handler for clients announcing available services by a regular expression.
5370 * @param cls closure
5371 * @param client identification of the client
5372 * @param message the actual message, which includes messages the client wants
5375 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
5376 const struct GNUNET_MessageHeader *message)
5378 struct MeshClient *c;
5382 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
5384 /* Sanity check for client registration */
5385 if (NULL == (c = client_get (client)))
5388 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5393 len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
5394 regex = GNUNET_malloc (len + 1);
5395 memcpy (regex, &message[1], len);
5397 GNUNET_array_append (c->regexes, c->n_regex, regex);
5398 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
5400 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
5406 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
5412 * Handler for requests of new tunnels
5414 * @param cls closure
5415 * @param client identification of the client
5416 * @param message the actual message
5419 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
5420 const struct GNUNET_MessageHeader *message)
5422 struct GNUNET_MESH_TunnelMessage *t_msg;
5423 struct MeshTunnel *t;
5424 struct MeshClient *c;
5426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
5428 /* Sanity check for client registration */
5429 if (NULL == (c = client_get (client)))
5432 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5437 /* Message sanity check */
5438 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5441 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5445 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5446 /* Sanity check for tunnel numbering */
5447 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
5450 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5453 /* Sanity check for duplicate tunnel IDs */
5454 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
5457 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5461 while (NULL != tunnel_get_by_pi (myid, next_tid))
5462 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5463 t = tunnel_new (myid, next_tid++, c, ntohl (t_msg->tunnel_id));
5466 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
5467 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5470 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5471 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
5472 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
5473 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
5475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
5476 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5482 * Handler for requests of deleting tunnels
5484 * @param cls closure
5485 * @param client identification of the client
5486 * @param message the actual message
5489 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
5490 const struct GNUNET_MessageHeader *message)
5492 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5493 struct MeshClient *c;
5494 struct MeshTunnel *t;
5495 MESH_TunnelNumber tid;
5497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5498 "Got a DESTROY TUNNEL from client!\n");
5500 /* Sanity check for client registration */
5501 if (NULL == (c = client_get (client)))
5504 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5507 /* Message sanity check */
5508 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5511 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5515 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5517 /* Retrieve tunnel */
5518 tid = ntohl (tunnel_msg->tunnel_id);
5519 t = tunnel_get_by_local_id(c, tid);
5523 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5524 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5527 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5529 client_ignore_tunnel (c, t);
5531 // TODO: when to destroy incoming tunnel?
5532 if (t->nclients == 0)
5534 GNUNET_assert (GNUNET_YES ==
5535 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
5537 GNUNET_assert (GNUNET_YES ==
5538 GNUNET_CONTAINER_multihashmap_remove (t->peers,
5539 &my_full_id.hashPubKey,
5543 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5546 send_client_tunnel_disconnect(t, c);
5547 client_delete_tunnel(c, t);
5549 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
5551 tunnel_send_destroy (t);
5552 t->destroy = GNUNET_YES;
5553 // The tunnel will be destroyed when the last message is transmitted.
5554 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5560 * Handler for requests of seeting tunnel's speed.
5562 * @param cls Closure (unused).
5563 * @param client Identification of the client.
5564 * @param message The actual message.
5567 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
5568 const struct GNUNET_MessageHeader *message)
5570 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5571 struct MeshClient *c;
5572 struct MeshTunnel *t;
5573 MESH_TunnelNumber tid;
5575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5576 "Got a SPEED request from client!\n");
5578 /* Sanity check for client registration */
5579 if (NULL == (c = client_get (client)))
5582 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5586 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5587 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5589 /* Retrieve tunnel */
5590 tid = ntohl (tunnel_msg->tunnel_id);
5591 t = tunnel_get_by_local_id(c, tid);
5595 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5596 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5600 switch (ntohs(message->type))
5602 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
5603 t->speed_min = GNUNET_YES;
5605 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
5606 t->speed_min = GNUNET_NO;
5611 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5616 * Handler for requests of seeting tunnel's buffering policy.
5618 * @param cls Closure (unused).
5619 * @param client Identification of the client.
5620 * @param message The actual message.
5623 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
5624 const struct GNUNET_MessageHeader *message)
5626 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5627 struct MeshClient *c;
5628 struct MeshTunnel *t;
5629 MESH_TunnelNumber tid;
5631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5632 "Got a BUFFER request from client!\n");
5634 /* Sanity check for client registration */
5635 if (NULL == (c = client_get (client)))
5638 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5642 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5643 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5645 /* Retrieve tunnel */
5646 tid = ntohl (tunnel_msg->tunnel_id);
5647 t = tunnel_get_by_local_id(c, tid);
5651 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5652 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5656 switch (ntohs(message->type))
5658 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
5659 t->nobuffer = GNUNET_NO;
5661 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
5662 t->nobuffer = GNUNET_YES;
5668 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5673 * Handler for connection requests to new peers
5675 * @param cls closure
5676 * @param client identification of the client
5677 * @param message the actual message (PeerControl)
5680 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
5681 const struct GNUNET_MessageHeader *message)
5683 struct GNUNET_MESH_PeerControl *peer_msg;
5684 struct MeshPeerInfo *peer_info;
5685 struct MeshClient *c;
5686 struct MeshTunnel *t;
5687 MESH_TunnelNumber tid;
5689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
5690 /* Sanity check for client registration */
5691 if (NULL == (c = client_get (client)))
5694 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5698 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5699 /* Sanity check for message size */
5700 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5703 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5707 /* Tunnel exists? */
5708 tid = ntohl (peer_msg->tunnel_id);
5709 t = tunnel_get_by_local_id (c, tid);
5713 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5717 /* Does client own tunnel? */
5718 if (t->owner->handle != client)
5721 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
5725 GNUNET_i2s (&peer_msg->peer));
5726 peer_info = peer_info_get (&peer_msg->peer);
5728 tunnel_add_peer (t, peer_info);
5729 peer_info_connect (peer_info, t);
5731 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5737 * Handler for disconnection requests of peers in a tunnel
5739 * @param cls closure
5740 * @param client identification of the client
5741 * @param message the actual message (PeerControl)
5744 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
5745 const struct GNUNET_MessageHeader *message)
5747 struct GNUNET_MESH_PeerControl *peer_msg;
5748 struct MeshPeerInfo *peer_info;
5749 struct MeshClient *c;
5750 struct MeshTunnel *t;
5751 MESH_TunnelNumber tid;
5753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
5754 /* Sanity check for client registration */
5755 if (NULL == (c = client_get (client)))
5758 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5761 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5762 /* Sanity check for message size */
5763 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5766 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5770 /* Tunnel exists? */
5771 tid = ntohl (peer_msg->tunnel_id);
5772 t = tunnel_get_by_local_id (c, tid);
5776 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5781 /* Does client own tunnel? */
5782 if (t->owner->handle != client)
5785 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
5790 GNUNET_i2s (&peer_msg->peer));
5791 /* Is the peer in the tunnel? */
5793 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
5794 if (NULL == peer_info)
5797 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5801 /* Ok, delete peer from tunnel */
5802 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
5803 &peer_msg->peer.hashPubKey);
5805 send_destroy_path (t, peer_info->id);
5806 tunnel_delete_peer (t, peer_info->id);
5807 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5812 * Handler for blacklist requests of peers in a tunnel
5814 * @param cls closure
5815 * @param client identification of the client
5816 * @param message the actual message (PeerControl)
5819 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
5820 const struct GNUNET_MessageHeader *message)
5822 struct GNUNET_MESH_PeerControl *peer_msg;
5823 struct MeshClient *c;
5824 struct MeshTunnel *t;
5825 MESH_TunnelNumber tid;
5827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
5828 /* Sanity check for client registration */
5829 if (NULL == (c = client_get (client)))
5832 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5835 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5837 /* Sanity check for message size */
5838 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5841 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5845 /* Tunnel exists? */
5846 tid = ntohl (peer_msg->tunnel_id);
5847 t = tunnel_get_by_local_id (c, tid);
5851 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5856 GNUNET_array_append(t->blacklisted, t->nblacklisted,
5857 GNUNET_PEER_intern(&peer_msg->peer));
5862 * Handler for unblacklist requests of peers in a tunnel
5864 * @param cls closure
5865 * @param client identification of the client
5866 * @param message the actual message (PeerControl)
5869 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
5870 const struct GNUNET_MessageHeader *message)
5872 struct GNUNET_MESH_PeerControl *peer_msg;
5873 struct MeshClient *c;
5874 struct MeshTunnel *t;
5875 MESH_TunnelNumber tid;
5879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
5880 /* Sanity check for client registration */
5881 if (NULL == (c = client_get (client)))
5884 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5887 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5889 /* Sanity check for message size */
5890 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5893 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5897 /* Tunnel exists? */
5898 tid = ntohl (peer_msg->tunnel_id);
5899 t = tunnel_get_by_local_id (c, tid);
5903 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5906 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5908 /* if peer is not known, complain */
5909 pid = GNUNET_PEER_search (&peer_msg->peer);
5916 /* search and remove from list */
5917 for (i = 0; i < t->nblacklisted; i++)
5919 if (t->blacklisted[i] == pid)
5921 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
5922 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
5927 /* if peer hasn't been blacklisted, complain */
5933 * Handler for connection requests to new peers by type
5935 * @param cls closure
5936 * @param client identification of the client
5937 * @param message the actual message (ConnectPeerByType)
5940 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
5941 const struct GNUNET_MessageHeader *message)
5943 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
5944 struct MeshClient *c;
5945 struct MeshTunnel *t;
5946 struct GNUNET_HashCode hash;
5947 MESH_TunnelNumber tid;
5949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
5950 /* Sanity check for client registration */
5951 if (NULL == (c = client_get (client)))
5954 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5958 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
5959 /* Sanity check for message size */
5960 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
5961 ntohs (connect_msg->header.size))
5964 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5968 /* Tunnel exists? */
5969 tid = ntohl (connect_msg->tunnel_id);
5970 t = tunnel_get_by_local_id (c, tid);
5974 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5978 /* Does client own tunnel? */
5979 if (t->owner->handle != client)
5982 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5986 /* Do WE have the service? */
5987 t->type = ntohl (connect_msg->type);
5988 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
5989 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
5990 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
5993 /* Yes! Fast forward, add ourselves to the tunnel and send the
5994 * good news to the client, and alert the destination client of
5995 * an incoming tunnel.
5997 * FIXME send a path create to self, avoid code duplication
5999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
6000 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
6001 peer_info_get (&my_full_id),
6002 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
6005 send_client_peer_connected (t, myid);
6006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
6007 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6009 t->local_tid_dest = next_local_tid++;
6010 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
6011 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
6012 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6016 /* Ok, lets find a peer offering the service */
6017 if (NULL != t->dht_get_type)
6019 GNUNET_DHT_get_stop (t->dht_get_type);
6021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
6022 GNUNET_h2s (&hash));
6024 GNUNET_DHT_get_start (dht_handle,
6025 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
6027 dht_replication_level,
6028 GNUNET_DHT_RO_RECORD_ROUTE |
6029 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6031 &dht_get_type_handler, t);
6033 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6039 * Handler for connection requests to new peers by a string service description.
6041 * @param cls closure
6042 * @param client identification of the client
6043 * @param message the actual message, which includes messages the client wants
6046 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
6047 const struct GNUNET_MessageHeader *message)
6049 struct GNUNET_MESH_ConnectPeerByString *msg;
6050 struct MeshRegexSearchContext *ctx;
6051 struct MeshRegexSearchInfo *info;
6052 struct GNUNET_DHT_GetHandle *get_h;
6053 struct GNUNET_HashCode key;
6054 struct MeshTunnel *t;
6055 struct MeshClient *c;
6056 MESH_TunnelNumber tid;
6060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6061 "Connect by string started\n");
6062 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
6063 size = htons (message->size);
6065 /* Sanity check for client registration */
6066 if (NULL == (c = client_get (client)))
6069 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6073 /* Message size sanity check */
6074 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
6077 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6081 /* Tunnel exists? */
6082 tid = ntohl (msg->tunnel_id);
6083 t = tunnel_get_by_local_id (c, tid);
6087 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6091 /* Does client own tunnel? */
6092 if (t->owner->handle != client)
6095 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6099 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6100 " on tunnel %s [%u]\n",
6101 GNUNET_i2s(&my_full_id),
6104 /* Only one connect_by_string allowed at the same time! */
6105 /* FIXME: allow more, return handle at api level to cancel, document */
6106 if (NULL != t->regex_ctx)
6109 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6113 /* Find string itself */
6114 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
6115 string = (const char *) &msg[1];
6117 /* Initialize context */
6118 size = GNUNET_REGEX_get_first_key(string, len, &key);
6119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6120 " consumed %u bits out of %u\n", size, len);
6121 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6122 " looking for %s\n", GNUNET_h2s (&key));
6124 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
6126 info->description = GNUNET_malloc (len + 1);
6127 memcpy (info->description, string, len);
6128 info->description[len] = '\0';
6129 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32);
6130 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32);
6131 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
6133 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
6134 ctx->position = size;
6138 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
6140 /* Start search in DHT */
6141 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
6142 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
6143 &key, /* key to search */
6144 dht_replication_level, /* replication level */
6145 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6146 NULL, /* xquery */ // FIXME BLOOMFILTER
6147 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
6148 &dht_get_string_handler, ctx);
6150 GNUNET_break (GNUNET_OK ==
6151 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
6154 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
6156 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
6162 * Handler for client traffic directed to one peer
6164 * @param cls closure
6165 * @param client identification of the client
6166 * @param message the actual message
6169 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
6170 const struct GNUNET_MessageHeader *message)
6172 struct MeshClient *c;
6173 struct MeshTunnel *t;
6174 struct MeshPeerInfo *pi;
6175 struct GNUNET_MESH_Unicast *data_msg;
6176 MESH_TunnelNumber tid;
6179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6180 "Got a unicast request from a client!\n");
6182 /* Sanity check for client registration */
6183 if (NULL == (c = client_get (client)))
6186 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6189 data_msg = (struct GNUNET_MESH_Unicast *) message;
6190 /* Sanity check for message size */
6191 size = ntohs (message->size);
6192 if (sizeof (struct GNUNET_MESH_Unicast) +
6193 sizeof (struct GNUNET_MessageHeader) > size)
6196 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6200 /* Tunnel exists? */
6201 tid = ntohl (data_msg->tid);
6202 t = tunnel_get_by_local_id (c, tid);
6206 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6210 /* Is it a local tunnel? Then, does client own the tunnel? */
6211 if (t->owner->handle != client)
6214 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6218 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
6219 &data_msg->destination.hashPubKey);
6220 /* Is the selected peer in the tunnel? */
6224 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6228 /* Ok, everything is correct, send the message
6229 * (pretend we got it from a mesh peer)
6232 char buf[ntohs (message->size)] GNUNET_ALIGN;
6233 struct GNUNET_MESH_Unicast *copy;
6235 /* Work around const limitation */
6236 copy = (struct GNUNET_MESH_Unicast *) buf;
6237 memcpy (buf, data_msg, size);
6238 copy->oid = my_full_id;
6239 copy->tid = htonl (t->id.tid);
6240 copy->ttl = htonl (default_ttl);
6241 copy->pid = htonl (t->pid + 1);
6242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6243 " calling generic handler...\n");
6244 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
6245 send_client_tunnel_ack (t->owner, t);
6247 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6253 * Handler for client traffic directed to the origin
6255 * @param cls closure
6256 * @param client identification of the client
6257 * @param message the actual message
6260 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
6261 const struct GNUNET_MessageHeader *message)
6263 struct GNUNET_MESH_ToOrigin *data_msg;
6264 struct GNUNET_PeerIdentity id;
6265 struct MeshClient *c;
6266 struct MeshTunnel *t;
6267 MESH_TunnelNumber tid;
6270 /* Sanity check for client registration */
6271 if (NULL == (c = client_get (client)))
6274 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6277 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
6278 /* Sanity check for message size */
6279 size = ntohs (message->size);
6280 if (sizeof (struct GNUNET_MESH_ToOrigin) +
6281 sizeof (struct GNUNET_MessageHeader) > size)
6284 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6288 /* Tunnel exists? */
6289 tid = ntohl (data_msg->tid);
6290 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6291 "Got a ToOrigin request from a client! Tunnel %X\n", tid);
6292 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6295 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6298 t = tunnel_get_by_local_id (c, tid);
6302 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6306 /* It should be sent by someone who has this as incoming tunnel. */
6307 if (-1 == client_knows_tunnel (c, t))
6310 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6313 GNUNET_PEER_resolve (t->id.oid, &id);
6315 /* Ok, everything is correct, send the message
6316 * (pretend we got it from a mesh peer)
6319 char buf[ntohs (message->size)] GNUNET_ALIGN;
6320 struct GNUNET_MESH_ToOrigin *copy;
6322 /* Work around const limitation */
6323 copy = (struct GNUNET_MESH_ToOrigin *) buf;
6324 memcpy (buf, data_msg, size);
6326 copy->tid = htonl (t->id.tid);
6327 copy->sender = my_full_id;
6328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6329 " calling generic handler...\n");
6330 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
6332 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6338 * Handler for client traffic directed to all peers in a tunnel
6340 * @param cls closure
6341 * @param client identification of the client
6342 * @param message the actual message
6345 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
6346 const struct GNUNET_MessageHeader *message)
6348 struct MeshClient *c;
6349 struct MeshTunnel *t;
6350 struct GNUNET_MESH_Multicast *data_msg;
6351 MESH_TunnelNumber tid;
6353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6354 "Got a multicast request from a client!\n");
6356 /* Sanity check for client registration */
6357 if (NULL == (c = client_get (client)))
6360 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6363 data_msg = (struct GNUNET_MESH_Multicast *) message;
6364 /* Sanity check for message size */
6365 if (sizeof (struct GNUNET_MESH_Multicast) +
6366 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
6369 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6373 /* Tunnel exists? */
6374 tid = ntohl (data_msg->tid);
6375 t = tunnel_get_by_local_id (c, tid);
6379 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6383 /* Does client own tunnel? */
6384 if (t->owner->handle != client)
6387 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6392 char buf[ntohs (message->size)] GNUNET_ALIGN;
6393 struct GNUNET_MESH_Multicast *copy;
6395 copy = (struct GNUNET_MESH_Multicast *) buf;
6396 memcpy (buf, message, ntohs (message->size));
6397 copy->oid = my_full_id;
6398 copy->tid = htonl (t->id.tid);
6399 copy->ttl = htonl (default_ttl);
6400 copy->pid = htonl (t->pid + 1);
6401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6402 " calling generic handler...\n");
6403 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
6406 /* receive done gets called when last copy is sent to a neighbor */
6412 * Functions to handle messages from clients
6414 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
6415 {&handle_local_new_client, NULL,
6416 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
6417 {&handle_local_announce_regex, NULL,
6418 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
6419 {&handle_local_tunnel_create, NULL,
6420 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
6421 sizeof (struct GNUNET_MESH_TunnelMessage)},
6422 {&handle_local_tunnel_destroy, NULL,
6423 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
6424 sizeof (struct GNUNET_MESH_TunnelMessage)},
6425 {&handle_local_tunnel_speed, NULL,
6426 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
6427 sizeof (struct GNUNET_MESH_TunnelMessage)},
6428 {&handle_local_tunnel_speed, NULL,
6429 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
6430 sizeof (struct GNUNET_MESH_TunnelMessage)},
6431 {&handle_local_tunnel_buffer, NULL,
6432 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
6433 sizeof (struct GNUNET_MESH_TunnelMessage)},
6434 {&handle_local_tunnel_buffer, NULL,
6435 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
6436 sizeof (struct GNUNET_MESH_TunnelMessage)},
6437 {&handle_local_connect_add, NULL,
6438 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
6439 sizeof (struct GNUNET_MESH_PeerControl)},
6440 {&handle_local_connect_del, NULL,
6441 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
6442 sizeof (struct GNUNET_MESH_PeerControl)},
6443 {&handle_local_blacklist, NULL,
6444 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
6445 sizeof (struct GNUNET_MESH_PeerControl)},
6446 {&handle_local_unblacklist, NULL,
6447 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
6448 sizeof (struct GNUNET_MESH_PeerControl)},
6449 {&handle_local_connect_by_type, NULL,
6450 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
6451 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
6452 {&handle_local_connect_by_string, NULL,
6453 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
6454 {&handle_local_unicast, NULL,
6455 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
6456 {&handle_local_to_origin, NULL,
6457 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
6458 {&handle_local_multicast, NULL,
6459 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
6465 * To be called on core init/fail.
6467 * @param cls service closure
6468 * @param server handle to the server for this service
6469 * @param identity the public identity of this peer
6472 core_init (void *cls, struct GNUNET_CORE_Handle *server,
6473 const struct GNUNET_PeerIdentity *identity)
6475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
6476 core_handle = server;
6477 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
6480 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
6481 GNUNET_SCHEDULER_shutdown ();
6488 * Method called whenever a given peer connects.
6490 * @param cls closure
6491 * @param peer peer identity this notification is about
6492 * @param atsi performance data for the connection
6493 * @param atsi_count number of records in 'atsi'
6496 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
6497 const struct GNUNET_ATS_Information *atsi,
6498 unsigned int atsi_count)
6500 struct MeshPeerInfo *peer_info;
6501 struct MeshPeerPath *path;
6503 DEBUG_CONN ("Peer connected\n");
6504 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
6505 peer_info = peer_info_get (peer);
6506 if (myid == peer_info->id)
6508 DEBUG_CONN (" (self)\n");
6513 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
6515 path = path_new (2);
6516 path->peers[0] = myid;
6517 path->peers[1] = peer_info->id;
6518 GNUNET_PEER_change_rc (myid, 1);
6519 GNUNET_PEER_change_rc (peer_info->id, 1);
6520 peer_info_add_path (peer_info, path, GNUNET_YES);
6521 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
6527 * Method called whenever a peer disconnects.
6529 * @param cls closure
6530 * @param peer peer identity this notification is about
6533 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
6535 struct MeshPeerInfo *pi;
6536 struct MeshPeerQueue *q;
6537 struct MeshPeerQueue *n;
6539 DEBUG_CONN ("Peer disconnected\n");
6540 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
6552 /* try to reroute this traffic instead */
6553 queue_destroy(q, GNUNET_YES);
6557 peer_info_remove_path (pi, pi->id, myid);
6560 DEBUG_CONN (" (self)\n");
6562 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
6567 /******************************************************************************/
6568 /************************ MAIN FUNCTIONS ****************************/
6569 /******************************************************************************/
6572 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
6574 * @param cls closure
6575 * @param key current key code
6576 * @param value value in the hash map
6577 * @return GNUNET_YES if we should continue to iterate,
6581 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
6583 struct MeshTunnel *t = value;
6590 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
6592 * @param cls closure
6593 * @param key current key code
6594 * @param value value in the hash map
6595 * @return GNUNET_YES if we should continue to iterate,
6599 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
6601 struct MeshPeerInfo *p = value;
6602 struct MeshPeerQueue *q;
6603 struct MeshPeerQueue *n;
6611 queue_destroy(q, GNUNET_YES);
6615 peer_info_destroy (p);
6620 * Task run during shutdown.
6626 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6628 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
6630 if (core_handle != NULL)
6632 GNUNET_CORE_disconnect (core_handle);
6635 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
6636 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
6637 if (dht_handle != NULL)
6639 GNUNET_DHT_disconnect (dht_handle);
6644 GNUNET_SERVER_notification_context_destroy (nc);
6647 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
6649 GNUNET_SCHEDULER_cancel (announce_id_task);
6650 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
6652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
6656 * Process mesh requests.
6658 * @param cls closure
6659 * @param server the initialized server
6660 * @param c configuration to use
6663 run (void *cls, struct GNUNET_SERVER_Handle *server,
6664 const struct GNUNET_CONFIGURATION_Handle *c)
6666 struct MeshPeerInfo *peer;
6667 struct MeshPeerPath *p;
6670 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
6671 server_handle = server;
6672 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
6673 NULL, /* Closure passed to MESH functions */
6674 &core_init, /* Call core_init once connected */
6675 &core_connect, /* Handle connects */
6676 &core_disconnect, /* remove peers on disconnects */
6677 NULL, /* Don't notify about all incoming messages */
6678 GNUNET_NO, /* For header only in notification */
6679 NULL, /* Don't notify about all outbound messages */
6680 GNUNET_NO, /* For header-only out notification */
6681 core_handlers); /* Register these handlers */
6683 if (core_handle == NULL)
6686 GNUNET_SCHEDULER_shutdown ();
6691 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
6694 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6696 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6698 GNUNET_SCHEDULER_shutdown ();
6703 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
6704 &refresh_path_time))
6706 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6708 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6709 "refresh path time");
6710 GNUNET_SCHEDULER_shutdown ();
6715 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
6716 &app_announce_time))
6718 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6720 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6721 "app announce time");
6722 GNUNET_SCHEDULER_shutdown ();
6727 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
6730 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6732 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6733 "id announce time");
6734 GNUNET_SCHEDULER_shutdown ();
6739 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
6740 &unacknowledged_wait_time))
6742 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6744 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6745 "unacknowledged wait time");
6746 GNUNET_SCHEDULER_shutdown ();
6751 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
6754 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6756 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6758 GNUNET_SCHEDULER_shutdown ();
6763 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
6766 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6768 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6770 GNUNET_SCHEDULER_shutdown ();
6775 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
6778 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6780 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6782 GNUNET_SCHEDULER_shutdown ();
6787 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
6790 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6792 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
6798 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
6799 &dht_replication_level))
6801 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6803 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
6804 "dht replication level", 10);
6805 dht_replication_level = 10;
6809 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
6810 GNUNET_free (keyfile);
6811 if (my_private_key == NULL)
6813 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6814 _("Mesh service could not access hostkey. Exiting.\n"));
6815 GNUNET_SCHEDULER_shutdown ();
6818 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
6819 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
6820 &my_full_id.hashPubKey);
6821 myid = GNUNET_PEER_intern (&my_full_id);
6823 // transport_handle = GNUNET_TRANSPORT_connect(c,
6830 dht_handle = GNUNET_DHT_connect (c, 64);
6831 if (dht_handle == NULL)
6836 stats = GNUNET_STATISTICS_create ("mesh", c);
6840 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
6842 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6843 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6844 peers = GNUNET_CONTAINER_multihashmap_create (32);
6845 applications = GNUNET_CONTAINER_multihashmap_create (32);
6846 types = GNUNET_CONTAINER_multihashmap_create (32);
6848 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
6849 nc = GNUNET_SERVER_notification_context_create (server_handle,
6851 GNUNET_SERVER_disconnect_notify (server_handle,
6852 &handle_local_client_disconnect, NULL);
6856 clients_tail = NULL;
6859 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
6860 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
6862 /* Create a peer_info for the local peer */
6863 peer = peer_info_get (&my_full_id);
6866 GNUNET_PEER_change_rc (myid, 1);
6867 peer_info_add_path (peer, p, GNUNET_YES);
6869 /* Scheduled the task to clean up when shutdown is called */
6870 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
6873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "end of run()\n");
6877 * The main function for the mesh service.
6879 * @param argc number of arguments from the command line
6880 * @param argv command line arguments
6881 * @return 0 ok, 1 on error
6884 main (int argc, char *const *argv)
6888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
6891 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
6893 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");