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 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
1883 tmsg.header.size = htons (sizeof (tmsg));
1884 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1885 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
1886 tmsg.tunnel_id = htonl (t->local_tid_dest);
1887 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1888 &tmsg.header, GNUNET_NO);
1889 GNUNET_array_append (t->clients, t->nclients, c);
1890 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1892 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
1893 c->incoming_tunnels, &hash, t,
1894 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1896 *tid = htonl (t->local_tid_dest);
1899 /* Check if the client wants to get traffic from the tunnel */
1900 if (GNUNET_NO == client_wants_tunnel(c, t))
1903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
1904 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1905 (struct GNUNET_MessageHeader
1906 *) cbuf, GNUNET_YES);
1914 * Notify the client that owns the tunnel that a peer has connected to it
1915 * (the requested path to it has been confirmed).
1917 * @param t Tunnel whose owner to notify
1918 * @param id Short id of the peer that has connected
1921 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
1923 struct GNUNET_MESH_PeerControl pc;
1925 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1926 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1927 pc.tunnel_id = htonl (t->local_tid);
1928 GNUNET_PEER_resolve (id, &pc.peer);
1929 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
1935 * Notify a client about how many more payload packages will we accept
1936 * on a given tunnel.
1942 send_client_tunnel_ack (struct MeshClient *c, struct MeshTunnel *t)
1944 struct GNUNET_MESH_LocalAck msg;
1947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1948 "Sending client ACK on tunnel %X\n",
1953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " to client %u\n", c->id);
1955 ack = tunnel_get_ack (t);
1957 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
1958 if (t->last_ack == ack)
1961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
1963 msg.header.size = htons (sizeof (msg));
1964 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1965 msg.tunnel_id = htonl (t->local_tid);
1966 msg.max_pid = htonl (ack);
1968 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1969 &msg.header, GNUNET_NO);
1974 * Notify all clients (not depending on registration status) that the incoming
1975 * tunnel is no longer valid.
1977 * @param t Tunnel that was destroyed.
1980 send_clients_tunnel_destroy (struct MeshTunnel *t)
1982 struct GNUNET_MESH_TunnelMessage msg;
1984 msg.header.size = htons (sizeof (msg));
1985 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1986 msg.tunnel_id = htonl (t->local_tid_dest);
1987 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
1992 * Notify clients of tunnel disconnections, if needed.
1993 * In case the origin disconnects, the destination clients get a tunnel destroy
1994 * notification. If the last destination disconnects (only one remaining client
1995 * in tunnel), the origin gets a (local ID) peer disconnected.
1996 * Note that the function must be called BEFORE removing the client from
1999 * @param t Tunnel that was destroyed.
2000 * @param c Client that disconnected.
2003 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2009 struct GNUNET_MESH_TunnelMessage msg;
2011 msg.header.size = htons (sizeof (msg));
2012 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2013 msg.tunnel_id = htonl (t->local_tid_dest);
2014 for (i = 0; i < t->nclients; i++)
2015 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2016 &msg.header, GNUNET_NO);
2018 // FIXME when to disconnect an incoming tunnel?
2019 else if (1 == t->nclients && NULL != t->owner)
2021 struct GNUNET_MESH_PeerControl msg;
2023 msg.header.size = htons (sizeof (msg));
2024 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2025 msg.tunnel_id = htonl (t->local_tid);
2026 msg.peer = my_full_id;
2027 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2028 &msg.header, GNUNET_NO);
2034 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2035 * and insert it in the appropiate structures if the peer is not known yet.
2037 * @param peer Full identity of the peer.
2039 * @return Existing or newly created peer info.
2041 static struct MeshPeerInfo *
2042 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2044 struct MeshPeerInfo *peer_info;
2046 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2047 if (NULL == peer_info)
2050 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2051 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2052 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2053 peer_info->id = GNUNET_PEER_intern (peer);
2061 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2062 * and insert it in the appropiate structures if the peer is not known yet.
2064 * @param peer Short identity of the peer.
2066 * @return Existing or newly created peer info.
2068 static struct MeshPeerInfo *
2069 peer_info_get_short (const GNUNET_PEER_Id peer)
2071 struct GNUNET_PeerIdentity id;
2073 GNUNET_PEER_resolve (peer, &id);
2074 return peer_info_get (&id);
2079 * Iterator to remove the tunnel from the list of tunnels a peer participates
2082 * @param cls Closure (tunnel info)
2083 * @param key GNUNET_PeerIdentity of the peer (unused)
2084 * @param value PeerInfo of the peer
2086 * @return always GNUNET_YES, to keep iterating
2089 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2091 struct MeshTunnel *t = cls;
2092 struct MeshPeerInfo *peer = value;
2095 for (i = 0; i < peer->ntunnels; i++)
2098 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2101 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2102 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2111 * Core callback to write a pre-constructed data packet to core buffer
2113 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2114 * @param size Number of bytes available in buf.
2115 * @param buf Where the to write the message.
2117 * @return number of bytes written to buf
2120 send_core_data_raw (void *cls, size_t size, void *buf)
2122 struct MeshTransmissionDescriptor *info = cls;
2123 struct GNUNET_MessageHeader *msg;
2126 GNUNET_assert (NULL != info);
2127 GNUNET_assert (NULL != info->mesh_data);
2128 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2129 total_size = ntohs (msg->size);
2131 if (total_size > size)
2136 memcpy (buf, msg, total_size);
2137 data_descriptor_decrement_rc (info->mesh_data);
2144 * Sends an already built non-multicast message to a peer,
2145 * properly registrating all used resources.
2147 * @param message Message to send. Function makes a copy of it.
2148 * @param peer Short ID of the neighbor whom to send the message.
2149 * @param t Tunnel on which this message is transmitted.
2152 send_message (const struct GNUNET_MessageHeader *message,
2153 const struct GNUNET_PeerIdentity *peer,
2154 struct MeshTunnel *t)
2156 struct MeshTransmissionDescriptor *info;
2157 struct MeshPeerInfo *neighbor;
2158 struct MeshPeerPath *p;
2161 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2163 size = ntohs (message->size);
2164 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2165 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2166 info->mesh_data->data = GNUNET_malloc (size);
2167 memcpy (info->mesh_data->data, message, size);
2168 if (ntohs(message->type) == GNUNET_MESSAGE_TYPE_MESH_UNICAST)
2170 struct GNUNET_MESH_Unicast *m;
2172 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2173 m->ttl = htonl (ntohl (m->ttl) - 1);
2175 info->mesh_data->data_len = size;
2176 info->mesh_data->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2177 *info->mesh_data->reference_counter = 1;
2178 neighbor = peer_info_get (peer);
2179 for (p = neighbor->path_head; NULL != p; p = p->next)
2188 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2189 GNUNET_free (info->mesh_data->data);
2190 GNUNET_free (info->mesh_data);
2194 info->peer = neighbor;
2204 * Sends a CREATE PATH message for a path to a peer, properly registrating
2205 * all used resources.
2207 * @param peer PeerInfo of the final peer for whom this path is being created.
2208 * @param p Path itself.
2209 * @param t Tunnel for which the path is created.
2212 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2213 struct MeshTunnel *t)
2215 struct GNUNET_PeerIdentity id;
2216 struct MeshPathInfo *path_info;
2217 struct MeshPeerInfo *neighbor;
2223 p = tree_get_path_to_peer (t->tree, peer->id);
2230 for (i = 0; i < p->length; i++)
2232 if (p->peers[i] == myid)
2235 if (i >= p->length - 1)
2241 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2243 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2244 path_info->path = p;
2246 neighbor = peer_info_get (&id);
2247 path_info->peer = neighbor;
2248 queue_add (path_info,
2249 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2250 sizeof (struct GNUNET_MESH_ManipulatePath) +
2251 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2258 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2260 * @param t Tunnel whose path to destroy.
2261 * @param destination Short ID of the peer to whom the path to destroy.
2264 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2266 struct MeshPeerPath *p;
2269 p = tree_get_path_to_peer (t->tree, destination);
2275 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2276 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2278 struct GNUNET_MESH_ManipulatePath *msg;
2279 struct GNUNET_PeerIdentity *pi;
2283 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2284 msg->header.size = htons (size);
2285 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2286 msg->tid = htonl (t->id.tid);
2287 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2288 for (i = 0; i < p->length; i++)
2290 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2292 send_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2299 * Try to establish a new connection to this peer.
2300 * Use the best path for the given tunnel.
2301 * If the peer doesn't have any path to it yet, try to get one.
2302 * If the peer already has some path, send a CREATE PATH towards it.
2304 * @param peer PeerInfo of the peer.
2305 * @param t Tunnel for which to create the path, if possible.
2308 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2310 struct MeshPeerPath *p;
2311 struct MeshPathInfo *path_info;
2313 if (NULL != peer->path_head)
2315 p = tree_get_path_to_peer (t->tree, peer->id);
2322 // FIXME always send create path to self
2325 send_create_path (peer, p, t);
2329 struct GNUNET_HashCode hash;
2332 send_client_peer_connected (t, myid);
2333 t->local_tid_dest = next_local_tid++;
2334 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2337 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2338 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2345 else if (NULL == peer->dhtget)
2347 struct GNUNET_PeerIdentity id;
2349 GNUNET_PEER_resolve (peer->id, &id);
2350 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2351 path_info->peer = peer;
2353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2354 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2355 peer->dhtgetcls = path_info;
2356 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2357 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2358 &id.hashPubKey, /* key to search */
2359 dht_replication_level, /* replication level */
2360 GNUNET_DHT_RO_RECORD_ROUTE |
2361 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2362 NULL, /* xquery */ // FIXME BLOOMFILTER
2363 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2364 &dht_get_id_handler, path_info);
2366 /* Otherwise, there is no path but the DHT get is already started. */
2371 * Task to delay the connection of a peer
2373 * @param cls Closure (path info with tunnel and peer to connect).
2374 * Will be free'd on exection.
2375 * @param tc TaskContext
2378 peer_info_connect_task (void *cls,
2379 const struct GNUNET_SCHEDULER_TaskContext *tc)
2381 struct MeshPathInfo *path_info = cls;
2383 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2388 peer_info_connect (path_info->peer, path_info->t);
2394 * Destroy the peer_info and free any allocated resources linked to it
2396 * @param pi The peer_info to destroy.
2398 * @return GNUNET_OK on success
2401 peer_info_destroy (struct MeshPeerInfo *pi)
2403 struct GNUNET_PeerIdentity id;
2404 struct MeshPeerPath *p;
2405 struct MeshPeerPath *nextp;
2407 GNUNET_PEER_resolve (pi->id, &id);
2408 GNUNET_PEER_change_rc (pi->id, -1);
2411 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2414 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2415 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2417 if (NULL != pi->dhtget)
2419 GNUNET_DHT_get_stop (pi->dhtget);
2420 GNUNET_free (pi->dhtgetcls);
2426 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2436 * Remove all paths that rely on a direct connection between p1 and p2
2437 * from the peer itself and notify all tunnels about it.
2439 * @param peer PeerInfo of affected peer.
2440 * @param p1 GNUNET_PEER_Id of one peer.
2441 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2444 * TODO: optimize (see below)
2447 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2450 struct MeshPeerPath *p;
2451 struct MeshPeerPath *aux;
2452 struct MeshPeerInfo *peer_d;
2454 unsigned int destroyed;
2459 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2461 p = peer->path_head;
2465 for (i = 0; i < (p->length - 1); i++)
2467 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2468 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2470 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2481 for (i = 0; i < peer->ntunnels; i++)
2483 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2487 * Problem: one or more peers have been deleted from the tunnel tree.
2488 * We don't know who they are to try to add them again.
2489 * We need to try to find a new path for each of the disconnected peers.
2490 * Some of them might already have a path to reach them that does not
2491 * involve p1 and p2. Adding all anew might render in a better tree than
2492 * the trivial immediate fix.
2494 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2495 * its children will be reachable trough him.
2497 peer_d = peer_info_get_short (d);
2500 for (p = peer_d->path_head; NULL != p; p = p->next)
2502 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2510 /* No callback, as peer will be already disconnected and a connection
2511 * scheduled by tunnel_notify_connection_broken.
2513 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2517 peer_info_connect (peer_d, peer->tunnels[i]);
2520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2525 * Add the path to the peer and update the path used to reach it in case this
2528 * @param peer_info Destination peer to add the path to.
2529 * @param path New path to add. Last peer must be the peer in arg 1.
2530 * Path will be either used of freed if already known.
2531 * @param trusted Do we trust that this path is real?
2534 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2537 struct MeshPeerPath *aux;
2541 if ((NULL == peer_info) || (NULL == path))
2544 path_destroy (path);
2547 if (path->peers[path->length - 1] != peer_info->id)
2550 path_destroy (path);
2553 if (path->length <= 2 && GNUNET_NO == trusted)
2555 /* Only allow CORE to tell us about direct paths */
2556 path_destroy (path);
2559 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2560 for (l = 1; l < path->length; l++)
2562 if (path->peers[l] == myid)
2564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2565 for (l2 = 0; l2 < path->length - l; l2++)
2567 path->peers[l2] = path->peers[l + l2];
2572 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2577 struct GNUNET_PeerIdentity id;
2579 GNUNET_PEER_resolve (peer_info->id, &id);
2580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2581 path->length, GNUNET_i2s (&id));
2584 l = path_get_length (path);
2591 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2592 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2594 l2 = path_get_length (aux);
2597 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2598 peer_info->path_tail, aux, path);
2603 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2605 path_destroy (path);
2610 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2617 * Add the path to the origin peer and update the path used to reach it in case
2618 * this is the shortest.
2619 * The path is given in peer_info -> destination, therefore we turn the path
2620 * upside down first.
2622 * @param peer_info Peer to add the path to, being the origin of the path.
2623 * @param path New path to add after being inversed.
2624 * @param trusted Do we trust that this path is real?
2627 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2628 struct MeshPeerPath *path, int trusted)
2631 peer_info_add_path (peer_info, path, trusted);
2636 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2637 * to obtain a local peer -> destination path and interning the peer ids.
2639 * @return Newly allocated and created path
2641 static struct MeshPeerPath *
2642 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2643 unsigned int get_path_length,
2644 const struct GNUNET_PeerIdentity *put_path,
2645 unsigned int put_path_length)
2647 struct MeshPeerPath *p;
2653 GNUNET_PEER_change_rc (myid, 1);
2654 i = get_path_length;
2655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2656 for (i--; i >= 0; i--)
2658 id = GNUNET_PEER_intern (&get_path[i]);
2659 if (p->length > 0 && id == p->peers[p->length - 1])
2661 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2662 GNUNET_PEER_change_rc (id, -1);
2666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2667 GNUNET_i2s (&get_path[i]));
2669 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2670 p->peers[p->length - 1] = id;
2673 i = put_path_length;
2674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2675 for (i--; i >= 0; i--)
2677 id = GNUNET_PEER_intern (&put_path[i]);
2680 /* PUT path went through us, so discard the path up until now and start
2681 * from here to get a much shorter (and loop-free) path.
2686 if (p->length > 0 && id == p->peers[p->length - 1])
2688 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2689 GNUNET_PEER_change_rc (id, -1);
2693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2694 GNUNET_i2s (&put_path[i]));
2696 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2697 p->peers[p->length - 1] = id;
2701 if (get_path_length > 0)
2702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2703 GNUNET_i2s (&get_path[0]));
2704 if (put_path_length > 0)
2705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2706 GNUNET_i2s (&put_path[0]));
2707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2709 for (i = 0; i < p->length; i++)
2711 struct GNUNET_PeerIdentity peer_id;
2713 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2715 GNUNET_i2s (&peer_id));
2723 * Adds a path to the peer_infos of all the peers in the path
2725 * @param p Path to process.
2726 * @param confirmed Whether we know if the path works or not.
2729 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2733 /* TODO: invert and add */
2734 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2735 for (i++; i < p->length; i++)
2737 struct MeshPeerInfo *aux;
2738 struct MeshPeerPath *copy;
2740 aux = peer_info_get_short (p->peers[i]);
2741 copy = path_duplicate (p);
2742 copy->length = i + 1;
2743 peer_info_add_path (aux, copy, GNUNET_NO);
2749 * Send keepalive packets for a peer
2751 * @param cls Closure (tunnel for which to send the keepalive).
2752 * @param tc Notification context.
2754 * TODO: implement explicit multicast keepalive?
2757 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2761 * Search for a tunnel among the incoming tunnels
2763 * @param tid the local id of the tunnel
2765 * @return tunnel handler, NULL if doesn't exist
2767 static struct MeshTunnel *
2768 tunnel_get_incoming (MESH_TunnelNumber tid)
2770 struct GNUNET_HashCode hash;
2772 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2773 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2774 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2779 * Search for a tunnel among the tunnels for a client
2781 * @param c the client whose tunnels to search in
2782 * @param tid the local id of the tunnel
2784 * @return tunnel handler, NULL if doesn't exist
2786 static struct MeshTunnel *
2787 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2789 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2791 return tunnel_get_incoming (tid);
2795 struct GNUNET_HashCode hash;
2797 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2798 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2804 * Search for a tunnel by global ID using PEER_ID
2806 * @param pi owner of the tunnel
2807 * @param tid global tunnel number
2809 * @return tunnel handler, NULL if doesn't exist
2811 static struct MeshTunnel *
2812 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2814 struct MESH_TunnelID id;
2815 struct GNUNET_HashCode hash;
2820 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2821 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2826 * Search for a tunnel by global ID using full PeerIdentities
2828 * @param oid owner of the tunnel
2829 * @param tid global tunnel number
2831 * @return tunnel handler, NULL if doesn't exist
2833 static struct MeshTunnel *
2834 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2836 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2841 * Delete an active client from the tunnel.
2847 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
2851 for (i = 0; i < t->nclients; i++)
2853 if (t->clients[i] == c)
2855 t->clients[i] = t->clients[t->nclients - 1];
2856 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
2864 * Delete an ignored client from the tunnel.
2870 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
2874 for (i = 0; i < t->nignore; i++)
2876 if (t->ignore[i] == c)
2878 t->ignore[i] = t->ignore[t->nignore - 1];
2879 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
2887 * Delete a client from the tunnel. It should be only done on
2888 * client disconnection, otherwise use client_ignore_tunnel.
2894 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
2896 tunnel_delete_ignored_client (t, c);
2897 tunnel_delete_active_client (t, c);
2902 * Iterator to free MeshTunnelChildInfo of tunnel children.
2904 * @param cls Closure (tunnel info).
2905 * @param key Hash of GNUNET_PEER_Id (unused).
2906 * @param value MeshTunnelChildInfo of the child.
2908 * @return always GNUNET_YES, to keep iterating
2911 tunnel_destroy_child (void *cls,
2912 const struct GNUNET_HashCode * key,
2915 GNUNET_free (value);
2921 * Callback used to notify a client owner of a tunnel that a peer has
2922 * disconnected, most likely because of a path change.
2924 * @param cls Closure (tunnel this notification is about).
2925 * @param peer_id Short ID of disconnected peer.
2928 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
2930 struct MeshTunnel *t = cls;
2931 struct MeshPeerInfo *peer;
2932 struct MeshPathInfo *path_info;
2934 if (NULL != t->owner && NULL != nc)
2936 struct GNUNET_MESH_PeerControl msg;
2938 msg.header.size = htons (sizeof (msg));
2939 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2940 msg.tunnel_id = htonl (t->local_tid);
2941 GNUNET_PEER_resolve (peer_id, &msg.peer);
2942 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2943 &msg.header, GNUNET_NO);
2945 peer = peer_info_get_short (peer_id);
2946 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2947 path_info->peer = peer;
2949 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
2954 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
2955 * needed rescources.
2956 * If peer already exists, reevaluate shortest path and change if different.
2958 * @param t Tunnel we want to add a new peer to
2959 * @param peer PeerInfo of the peer being added
2963 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
2965 struct GNUNET_PeerIdentity id;
2966 struct MeshPeerPath *best_p;
2967 struct MeshPeerPath *p;
2968 unsigned int best_cost;
2971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
2972 GNUNET_PEER_resolve (peer->id, &id);
2974 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
2977 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
2978 GNUNET_assert (GNUNET_OK ==
2979 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
2981 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2984 if (NULL != (p = peer->path_head))
2987 best_cost = tree_get_path_cost (t->tree, p);
2990 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
2997 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
2998 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
2999 t->path_refresh_task =
3000 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3004 /* Start a DHT get */
3005 peer_info_connect (peer, t);
3007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3011 * Add a path to a tunnel which we don't own, just to remember the next hop.
3012 * If destination node was already in the tunnel, the first hop information
3013 * will be replaced with the new path.
3015 * @param t Tunnel we want to add a new peer to
3016 * @param p Path to add
3017 * @param own_pos Position of local node in path.
3021 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3022 unsigned int own_pos)
3024 struct GNUNET_PeerIdentity id;
3026 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3027 GNUNET_assert (0 != own_pos);
3028 tree_add_path (t->tree, p, NULL, NULL);
3029 if (own_pos < p->length - 1)
3031 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3032 tree_update_first_hops (t->tree, myid, &id);
3034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3039 * Notifies a tunnel that a connection has broken that affects at least
3040 * some of its peers. Sends a notification towards the root of the tree.
3041 * In case the peer is the owner of the tree, notifies the client that owns
3042 * the tunnel and tries to reconnect.
3044 * @param t Tunnel affected.
3045 * @param p1 Peer that got disconnected from p2.
3046 * @param p2 Peer that got disconnected from p1.
3048 * @return Short ID of the peer disconnected (either p1 or p2).
3049 * 0 if the tunnel remained unaffected.
3051 static GNUNET_PEER_Id
3052 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3058 tree_notify_connection_broken (t->tree, p1, p2,
3059 &tunnel_notify_client_peer_disconnected,
3061 if (myid != p1 && myid != p2)
3067 if (tree_get_predecessor (t->tree) != 0)
3069 /* We are the peer still connected, notify owner of the disconnection. */
3070 struct GNUNET_MESH_PathBroken msg;
3071 struct GNUNET_PeerIdentity neighbor;
3073 msg.header.size = htons (sizeof (msg));
3074 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3075 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3076 msg.tid = htonl (t->id.tid);
3077 msg.peer1 = my_full_id;
3078 GNUNET_PEER_resolve (pid, &msg.peer2);
3079 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3080 send_message (&msg.header, &neighbor, t);
3088 * Send a multicast packet to a neighbor.
3090 * @param cls Closure (Info about the multicast packet)
3091 * @param neighbor_id Short ID of the neighbor to send the packet to.
3094 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3096 struct MeshData *mdata = cls;
3097 struct MeshTransmissionDescriptor *info;
3098 struct GNUNET_PeerIdentity neighbor;
3100 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3102 info->mesh_data = mdata;
3103 (*(mdata->reference_counter)) ++;
3104 info->destination = neighbor_id;
3105 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3107 GNUNET_i2s (&neighbor));
3108 info->peer = peer_info_get (&neighbor);
3109 GNUNET_assert (NULL != info->peer);
3111 GNUNET_MESSAGE_TYPE_MESH_MULTICAST,
3112 info->mesh_data->data_len,
3119 * Send a message in a tunnel in multicast, sending a copy to each child node
3120 * down the local one in the tunnel tree.
3122 * @param t Tunnel in which to send the data.
3123 * @param msg Message to be sent.
3124 * @param internal Has the service generated this message?
3127 tunnel_send_multicast (struct MeshTunnel *t,
3128 const struct GNUNET_MessageHeader *msg,
3131 struct MeshData *mdata;
3133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3134 " sending a multicast packet...\n");
3135 mdata = GNUNET_malloc (sizeof (struct MeshData));
3136 mdata->data_len = ntohs (msg->size);
3137 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
3139 mdata->data = GNUNET_malloc (mdata->data_len);
3140 memcpy (mdata->data, msg, mdata->data_len);
3141 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3143 struct GNUNET_MESH_Multicast *mcast;
3145 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3146 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3148 ntohl (mcast->ttl));
3152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3154 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
3155 && GNUNET_NO == internal)
3157 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
3159 GNUNET_SCHEDULER_add_delayed (unacknowledged_wait_time, &client_allow_send,
3161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
3165 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3166 if (*(mdata->reference_counter) == 0)
3168 GNUNET_free (mdata->data);
3169 GNUNET_free (mdata->reference_counter);
3170 if (NULL != mdata->task)
3172 GNUNET_SCHEDULER_cancel(*(mdata->task));
3173 GNUNET_free (mdata->task);
3174 GNUNET_SERVER_receive_done(t->owner->handle, GNUNET_OK);
3176 // FIXME change order?
3177 GNUNET_free (mdata);
3179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3180 " sending a multicast packet done\n");
3186 * Increase the SKIP value of all peers that
3187 * have not received a unicast message.
3189 * @param cls Closure (ID of the peer that HAS received the message).
3190 * @param key ID of the neighbor.
3191 * @param value Information about the neighbor.
3193 * @return GNUNET_YES to keep iterating.
3196 tunnel_add_skip (void *cls,
3197 const struct GNUNET_HashCode * key,
3200 struct GNUNET_PeerIdentity *neighbor = cls;
3201 struct MeshTunnelChildInfo *cinfo = value;
3203 /* TODO compare only pointers? key == neighbor? */
3204 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3215 * Iterator to get the appropiate ACK value from all children nodes.
3217 * @param cls Closue (tunnel).
3218 * @param id Id of the child node.
3221 tunnel_get_child_ack (void *cls,
3224 struct GNUNET_PeerIdentity peer_id;
3225 struct MeshTunnelChildInfo *cinfo;
3226 struct MeshTunnel *t = cls;
3229 GNUNET_PEER_resolve (id, &peer_id);
3230 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3231 &peer_id.hashPubKey);
3234 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3236 cinfo->pid = t->pid;
3237 cinfo->skip = t->pid;
3238 cinfo->max_pid = ack = t->pid + 1;
3239 GNUNET_assert (GNUNET_OK ==
3240 GNUNET_CONTAINER_multihashmap_put(t->children_fc,
3241 &peer_id.hashPubKey,
3243 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3247 ack = cinfo->max_pid;
3250 if (0 == t->max_child_ack)
3251 t->max_child_ack = ack;
3253 if (GNUNET_YES == t->speed_min)
3255 t->max_child_ack = t->max_child_ack > ack ? ack : t->max_child_ack;
3259 t->max_child_ack = t->max_child_ack > ack ? t->max_child_ack : ack;
3266 * Get the maximum PID allowed to transmit to any
3267 * tunnel child of the local peer.
3271 * @return Maximum PID allowed.
3274 tunnel_get_children_ack (struct MeshTunnel *t)
3276 t->max_child_ack = 0;
3277 tree_iterate_children (t->tree, tunnel_get_child_ack, t);
3278 return t->max_child_ack;
3283 * Get the current ack value for a tunnel, taking in account the tunnel
3284 * mode and the status of all children nodes.
3288 * @return Maximum PID allowed.
3291 tunnel_get_ack (struct MeshTunnel *t)
3294 uint32_t buffer_free;
3298 count = t->pid - t->skip;
3299 buffer_free = t->queue_max - t->queue_n;
3300 ack = count + buffer_free;
3301 child_ack = tunnel_get_children_ack (t);
3303 if (GNUNET_YES == t->speed_min)
3305 ack = child_ack > ack ? ack : child_ack;
3309 ack = child_ack > ack ? child_ack : ack;
3316 * Send an ACK informing the predecessor about the available buffer space.
3317 * If buffering is off, send only on behalf of children or self if endpoint.
3318 * If buffering is on, send when sent to children and buffer space is free.
3320 * @param t Tunnel on which to send the ACK.
3323 tunnel_send_ack (struct MeshTunnel *t, uint16_t type)
3325 struct GNUNET_MESH_ACK msg;
3326 struct GNUNET_PeerIdentity id;
3329 /* Is it after unicast / multicast retransmission? */
3330 if (GNUNET_MESSAGE_TYPE_MESH_ACK != type)
3332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ACK via DATA retransmission\n");
3333 if (GNUNET_YES == t->nobuffer)
3335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3338 if (t->queue_max > t->queue_n * 2)
3340 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3345 /* Ok, ACK might be necessary, what PID to ACK? */
3346 ack = tunnel_get_ack (t);
3348 /* If speed_min and not all children have ack'd, dont send yet */
3349 if (ack == t->last_ack)
3351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, not ready\n");
3356 msg.pid = htonl (ack);
3358 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3360 msg.header.size = htons (sizeof (msg));
3361 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3362 msg.tid = htonl (t->id.tid);
3363 GNUNET_PEER_resolve(t->id.oid, &msg.oid);
3364 send_message (&msg.header, &id, t);
3369 * Send a message to all peers in this tunnel that the tunnel is no longer
3372 * @param t The tunnel whose peers to notify.
3375 tunnel_send_destroy (struct MeshTunnel *t)
3377 struct GNUNET_MESH_TunnelDestroy msg;
3379 msg.header.size = htons (sizeof (msg));
3380 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3381 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3382 msg.tid = htonl (t->id.tid);
3383 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
3388 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
3390 * @param cls Closure (Tunnel which to cancel).
3391 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
3394 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
3396 struct MeshTunnel *t = cls;
3397 struct MeshPeerInfo *peer_info;
3398 struct MeshPeerQueue *pq;
3399 struct MeshPeerQueue *next;
3401 peer_info = peer_info_get_short (neighbor_id);
3402 for (pq = peer_info->queue_head; NULL != pq; pq = next)
3405 if (pq->tunnel == t)
3407 queue_destroy (pq, GNUNET_YES);
3410 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
3412 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
3413 peer_info->core_transmit = NULL;
3418 * Destroy the tunnel and free any allocated resources linked to it.
3420 * @param t the tunnel to destroy
3422 * @return GNUNET_OK on success
3425 tunnel_destroy (struct MeshTunnel *t)
3427 struct MeshClient *c;
3428 struct GNUNET_HashCode hash;
3435 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
3441 struct GNUNET_PeerIdentity id;
3443 GNUNET_PEER_resolve (t->id.oid, &id);
3444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3445 GNUNET_i2s (&id), t->id.tid);
3447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3451 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3452 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3457 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3460 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
3464 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
3465 for (i = 0; i < t->nclients; i++)
3469 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
3474 for (i = 0; i < t->nignore; i++)
3478 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
3483 if (t->nclients > 0)
3486 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
3490 GNUNET_free (t->clients);
3492 if (NULL != t->peers)
3494 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
3496 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
3499 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
3500 &tunnel_destroy_child,
3502 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
3504 tree_destroy (t->tree);
3506 if (NULL != t->regex_ctx)
3507 regex_cancel_search (t->regex_ctx);
3508 if (NULL != t->dht_get_type)
3509 GNUNET_DHT_get_stop (t->dht_get_type);
3510 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
3511 GNUNET_SCHEDULER_cancel (t->timeout_task);
3512 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
3513 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
3516 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
3517 GNUNET_assert (0 <= n_tunnels);
3524 * Create a new tunnel
3526 * @param owner Who is the owner of the tunnel (short ID).
3527 * @param tid Tunnel Number of the tunnel.
3528 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
3529 * @param local Tunnel Number for the tunnel, for the client point of view.
3531 * @return A new initialized tunnel. NULL on error.
3533 static struct MeshTunnel *
3534 tunnel_new (GNUNET_PEER_Id owner,
3535 MESH_TunnelNumber tid,
3536 struct MeshClient *client,
3537 MESH_TunnelNumber local)
3539 struct MeshTunnel *t;
3540 struct GNUNET_HashCode hash;
3542 if (n_tunnels >= max_tunnels && NULL == client)
3545 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3548 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
3549 t->tree = tree_new (owner);
3551 t->local_tid = local;
3552 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8);
3554 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
3556 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3558 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3559 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3564 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3570 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3572 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
3573 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3577 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3587 * Removes an explicit path from a tunnel, freeing all intermediate nodes
3588 * that are no longer needed, as well as nodes of no longer reachable peers.
3589 * The tunnel itself is also destoyed if results in a remote empty tunnel.
3591 * @param t Tunnel from which to remove the path.
3592 * @param peer Short id of the peer which should be removed.
3595 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
3597 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
3603 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
3604 * client when the client disconnects. If the client is not the owner, the
3605 * owner will get notified if no more clients are in the tunnel and the client
3606 * get removed from the tunnel's list.
3608 * @param cls closure (client that is disconnecting)
3609 * @param key the hash of the local tunnel id (used to access the hashmap)
3610 * @param value the value stored at the key (tunnel to destroy)
3612 * @return GNUNET_OK on success
3615 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
3617 struct MeshTunnel *t = value;
3618 struct MeshClient *c = cls;
3621 send_client_tunnel_disconnect(t, c);
3624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3625 "Client %u is destination, keeping the tunnel alive.\n", c->id);
3626 tunnel_delete_client(t, c);
3627 client_delete_tunnel(c, t);
3630 tunnel_send_destroy(t);
3631 r = tunnel_destroy (t);
3637 * Timeout function, destroys tunnel if called
3639 * @param cls Closure (tunnel to destroy).
3640 * @param tc TaskContext
3643 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3645 struct MeshTunnel *t = cls;
3647 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3649 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3654 * Resets the tunnel timeout. Starts it if no timeout was running.
3656 * @param t Tunnel whose timeout to reset.
3659 tunnel_reset_timeout (struct MeshTunnel *t)
3661 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
3662 GNUNET_SCHEDULER_cancel (t->timeout_task);
3664 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3665 (refresh_path_time, 4), &tunnel_timeout, t);
3669 /******************************************************************************/
3670 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3671 /******************************************************************************/
3674 * Function to send a create path packet to a peer.
3676 * @param cls closure
3677 * @param size number of bytes available in buf
3678 * @param buf where the callee should write the message
3679 * @return number of bytes written to buf
3682 send_core_path_create (void *cls, size_t size, void *buf)
3684 struct MeshPathInfo *info = cls;
3685 struct GNUNET_MESH_ManipulatePath *msg;
3686 struct GNUNET_PeerIdentity *peer_ptr;
3687 struct MeshTunnel *t = info->t;
3688 struct MeshPeerPath *p = info->path;
3693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
3695 sizeof (struct GNUNET_MESH_ManipulatePath) +
3696 p->length * sizeof (struct GNUNET_PeerIdentity);
3698 if (size < size_needed || NULL == buf)
3703 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
3704 msg->header.size = htons (size_needed);
3705 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
3706 msg->tid = ntohl (t->id.tid);
3708 if (GNUNET_YES == t->speed_min)
3709 opt = MESH_TUNNEL_OPT_SPEED_MIN;
3710 if (GNUNET_YES == t->nobuffer)
3711 opt |= MESH_TUNNEL_OPT_NOBUFFER;
3712 msg->opt = htonl(opt);
3714 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
3715 for (i = 0; i < p->length; i++)
3717 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
3723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3724 "CREATE PATH (%u bytes long) sent!\n", size_needed);
3730 * Fill the core buffer
3732 * @param cls closure (data itself)
3733 * @param size number of bytes available in buf
3734 * @param buf where the callee should write the message
3736 * @return number of bytes written to buf
3739 send_core_data_multicast (void *cls, size_t size, void *buf)
3741 struct MeshTransmissionDescriptor *info = cls;
3744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
3745 GNUNET_assert (NULL != info);
3746 GNUNET_assert (NULL != info->peer);
3747 total_size = info->mesh_data->data_len;
3748 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
3750 if (total_size > size)
3755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
3756 memcpy (buf, info->mesh_data->data, total_size);
3759 struct GNUNET_MESH_Multicast *mc;
3760 struct GNUNET_MessageHeader *mh;
3763 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3765 mc = (struct GNUNET_MESH_Multicast *) mh;
3766 mh = (struct GNUNET_MessageHeader *) &mc[1];
3767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3768 " multicast, payload type %u\n", ntohs (mh->type));
3769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3770 " multicast, payload size %u\n", ntohs (mh->size));
3774 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %u\n",
3779 data_descriptor_decrement_rc (info->mesh_data);
3780 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
3782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
3788 * Creates a path ack message in buf and frees all unused resources.
3790 * @param cls closure (MeshTransmissionDescriptor)
3791 * @param size number of bytes available in buf
3792 * @param buf where the callee should write the message
3793 * @return number of bytes written to buf
3796 send_core_path_ack (void *cls, size_t size, void *buf)
3798 struct MeshTransmissionDescriptor *info = cls;
3799 struct GNUNET_MESH_PathACK *msg = buf;
3801 GNUNET_assert (NULL != info);
3802 if (sizeof (struct GNUNET_MESH_PathACK) > size)
3807 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
3808 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3809 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
3810 msg->tid = htonl (info->origin->tid);
3811 msg->peer_id = my_full_id;
3814 /* TODO add signature */
3816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
3817 return sizeof (struct GNUNET_MESH_PathACK);
3822 * Free a transmission that was already queued with all resources
3823 * associated to the request.
3825 * @param queue Queue handler to cancel.
3826 * @param clear_cls Is it necessary to free associated cls?
3829 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3831 struct MeshTransmissionDescriptor *dd;
3832 struct MeshPathInfo *path_info;
3834 if (GNUNET_YES == clear_cls)
3836 switch (queue->type)
3838 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3839 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3840 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
3843 data_descriptor_decrement_rc (dd->mesh_data);
3845 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3847 path_info = queue->cls;
3848 path_destroy (path_info->path);
3852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
3854 GNUNET_free_non_null (queue->cls);
3856 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3857 queue->peer->queue_tail,
3859 GNUNET_free (queue);
3864 * Core callback to write a queued packet to core buffer
3866 * @param cls Closure (peer info).
3867 * @param size Number of bytes available in buf.
3868 * @param buf Where the to write the message.
3870 * @return number of bytes written to buf
3873 queue_send (void *cls, size_t size, void *buf)
3875 struct MeshPeerInfo *peer = cls;
3876 struct GNUNET_MessageHeader *msg;
3877 struct MeshPeerQueue *queue;
3878 struct MeshTunnel *t;
3881 peer->core_transmit = NULL;
3882 queue = peer->queue_head;
3884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
3886 /* If queue is empty, send should have been cancelled */
3892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
3894 /* Check if buffer size is enough for the message */
3895 if (queue->size > size)
3897 struct GNUNET_PeerIdentity id;
3899 GNUNET_PEER_resolve (peer->id, &id);
3900 peer->core_transmit =
3901 GNUNET_CORE_notify_transmit_ready(core_handle,
3904 GNUNET_TIME_UNIT_FOREVER_REL,
3911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
3917 switch (queue->type)
3920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* raw\n");
3921 data_size = send_core_data_raw (queue->cls, size, buf);
3922 msg = (struct GNUNET_MessageHeader *) buf;
3923 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_UNICAST)
3924 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3926 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
3928 data_size = send_core_data_multicast(queue->cls, size, buf);
3929 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3931 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
3933 data_size = send_core_path_create(queue->cls, size, buf);
3935 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
3937 data_size = send_core_path_ack(queue->cls, size, buf);
3941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* type unknown\n");
3945 /* Free queue, but cls was freed by send_core_* */
3946 queue_destroy (queue, GNUNET_NO);
3948 if (GNUNET_YES == t->destroy && 0 == t->queue_n)
3950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
3954 /* If more data in queue, send next */
3955 if (NULL != peer->queue_head)
3957 struct GNUNET_PeerIdentity id;
3959 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
3960 GNUNET_PEER_resolve (peer->id, &id);
3961 peer->core_transmit =
3962 GNUNET_CORE_notify_transmit_ready(core_handle,
3965 GNUNET_TIME_UNIT_FOREVER_REL,
3967 peer->queue_head->size,
3971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
3977 * Queue and pass message to core when possible.
3979 * @param cls Closure (type dependant).
3980 * @param type Type of the message, 0 for a raw message.
3981 * @param size Size of the message.
3982 * @param dst Neighbor to send message to.
3983 * @param t Tunnel this message belongs to.
3986 queue_add (void *cls, uint16_t type, size_t size,
3987 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3989 struct MeshPeerQueue *queue;
3991 if (t->queue_n >= t->queue_max)
3993 if (NULL == t->owner)
3994 GNUNET_break_op(0); // TODO: kill connection?
3997 return; // Drop message
4000 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
4006 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
4007 if (NULL == dst->core_transmit)
4009 struct GNUNET_PeerIdentity id;
4011 GNUNET_PEER_resolve (dst->id, &id);
4012 dst->core_transmit =
4013 GNUNET_CORE_notify_transmit_ready(core_handle,
4016 GNUNET_TIME_UNIT_FOREVER_REL,
4025 /******************************************************************************/
4026 /******************** MESH NETWORK HANDLERS **************************/
4027 /******************************************************************************/
4031 * Core handler for path creation
4033 * @param cls closure
4034 * @param message message
4035 * @param peer peer identity this notification is about
4036 * @param atsi performance data
4037 * @param atsi_count number of records in 'atsi'
4039 * @return GNUNET_OK to keep the connection open,
4040 * GNUNET_SYSERR to close it (signal serious error)
4043 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
4044 const struct GNUNET_MessageHeader *message,
4045 const struct GNUNET_ATS_Information *atsi,
4046 unsigned int atsi_count)
4048 unsigned int own_pos;
4051 MESH_TunnelNumber tid;
4052 struct GNUNET_MESH_ManipulatePath *msg;
4053 struct GNUNET_PeerIdentity *pi;
4054 struct GNUNET_HashCode hash;
4055 struct MeshPeerPath *path;
4056 struct MeshPeerInfo *dest_peer_info;
4057 struct MeshPeerInfo *orig_peer_info;
4058 struct MeshTunnel *t;
4060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4061 "Received a path create msg [%s]\n",
4062 GNUNET_i2s (&my_full_id));
4063 size = ntohs (message->size);
4064 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4066 GNUNET_break_op (0);
4070 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4071 if (size % sizeof (struct GNUNET_PeerIdentity))
4073 GNUNET_break_op (0);
4076 size /= sizeof (struct GNUNET_PeerIdentity);
4079 GNUNET_break_op (0);
4082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4083 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4085 tid = ntohl (msg->tid);
4086 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4088 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
4089 t = tunnel_get (pi, tid);
4090 if (NULL == t) // FIXME only for INCOMING tunnels?
4094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
4095 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
4098 // FIXME notify failure
4101 opt = ntohl (msg->opt);
4102 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
4103 GNUNET_YES : GNUNET_NO;
4104 t->nobuffer = (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER)) ?
4105 GNUNET_YES : GNUNET_NO;
4107 if (GNUNET_YES == t->nobuffer)
4110 while (NULL != tunnel_get_incoming (next_local_tid))
4111 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4112 t->local_tid_dest = next_local_tid++;
4113 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4115 tunnel_reset_timeout (t);
4116 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4118 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
4119 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
4127 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
4128 if (NULL == dest_peer_info)
4130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4131 " Creating PeerInfo for destination.\n");
4132 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4133 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
4134 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
4136 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4138 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
4139 if (NULL == orig_peer_info)
4141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4142 " Creating PeerInfo for origin.\n");
4143 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4144 orig_peer_info->id = GNUNET_PEER_intern (pi);
4145 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
4146 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4149 path = path_new (size);
4151 for (i = 0; i < size; i++)
4153 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4154 GNUNET_i2s (&pi[i]));
4155 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4156 if (path->peers[i] == myid)
4159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4162 /* cannot be self, must be 'not found' */
4163 /* create path: self not found in path through self */
4164 GNUNET_break_op (0);
4165 path_destroy (path);
4166 /* FIXME error. destroy tunnel? leave for timeout? */
4169 path_add_to_peers (path, GNUNET_NO);
4170 tunnel_add_path (t, path, own_pos);
4171 if (own_pos == size - 1)
4173 /* It is for us! Send ack. */
4174 struct MeshTransmissionDescriptor *info;
4176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4177 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4178 if (NULL == t->peers)
4180 /* New tunnel! Notify clients on data. */
4181 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
4183 GNUNET_break (GNUNET_SYSERR !=
4184 GNUNET_CONTAINER_multihashmap_put (t->peers,
4185 &my_full_id.hashPubKey,
4188 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
4189 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
4190 info->origin = &t->id;
4191 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4192 GNUNET_assert (NULL != info->peer);
4194 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4195 sizeof (struct GNUNET_MESH_PathACK),
4201 struct MeshPeerPath *path2;
4203 /* It's for somebody else! Retransmit. */
4204 path2 = path_duplicate (path);
4205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4206 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4207 path2 = path_duplicate (path);
4208 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
4209 send_create_path (dest_peer_info, path, t);
4216 * Core handler for path destruction
4218 * @param cls closure
4219 * @param message message
4220 * @param peer peer identity this notification is about
4221 * @param atsi performance data
4222 * @param atsi_count number of records in 'atsi'
4224 * @return GNUNET_OK to keep the connection open,
4225 * GNUNET_SYSERR to close it (signal serious error)
4228 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4229 const struct GNUNET_MessageHeader *message,
4230 const struct GNUNET_ATS_Information *atsi,
4231 unsigned int atsi_count)
4233 struct GNUNET_MESH_ManipulatePath *msg;
4234 struct GNUNET_PeerIdentity *pi;
4235 struct MeshPeerPath *path;
4236 struct MeshTunnel *t;
4237 unsigned int own_pos;
4241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4242 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
4243 size = ntohs (message->size);
4244 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4246 GNUNET_break_op (0);
4250 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4251 if (size % sizeof (struct GNUNET_PeerIdentity))
4253 GNUNET_break_op (0);
4256 size /= sizeof (struct GNUNET_PeerIdentity);
4259 GNUNET_break_op (0);
4262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4264 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4265 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4267 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
4269 t = tunnel_get (pi, ntohl (msg->tid));
4272 /* TODO notify back: we don't know this tunnel */
4273 GNUNET_break_op (0);
4276 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4277 path = path_new (size);
4279 for (i = 0; i < size; i++)
4281 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4282 GNUNET_i2s (&pi[i]));
4283 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4284 if (path->peers[i] == myid)
4287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4288 if (own_pos < path->length - 1)
4289 send_message (message, &pi[own_pos + 1], t);
4291 send_client_tunnel_disconnect(t, NULL);
4293 tunnel_delete_peer (t, path->peers[path->length - 1]);
4294 path_destroy (path);
4300 * Core handler for notifications of broken paths
4302 * @param cls closure
4303 * @param message message
4304 * @param peer peer identity this notification is about
4305 * @param atsi performance data
4306 * @param atsi_count number of records in 'atsi'
4308 * @return GNUNET_OK to keep the connection open,
4309 * GNUNET_SYSERR to close it (signal serious error)
4312 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4313 const struct GNUNET_MessageHeader *message,
4314 const struct GNUNET_ATS_Information *atsi,
4315 unsigned int atsi_count)
4317 struct GNUNET_MESH_PathBroken *msg;
4318 struct MeshTunnel *t;
4320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4321 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4322 msg = (struct GNUNET_MESH_PathBroken *) message;
4323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4324 GNUNET_i2s (&msg->peer1));
4325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4326 GNUNET_i2s (&msg->peer2));
4327 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4330 GNUNET_break_op (0);
4333 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4334 GNUNET_PEER_search (&msg->peer2));
4341 * Core handler for tunnel destruction
4343 * @param cls closure
4344 * @param message message
4345 * @param peer peer identity this notification is about
4346 * @param atsi performance data
4347 * @param atsi_count number of records in 'atsi'
4349 * @return GNUNET_OK to keep the connection open,
4350 * GNUNET_SYSERR to close it (signal serious error)
4353 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4354 const struct GNUNET_MessageHeader *message,
4355 const struct GNUNET_ATS_Information *atsi,
4356 unsigned int atsi_count)
4358 struct GNUNET_MESH_TunnelDestroy *msg;
4359 struct MeshTunnel *t;
4361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4362 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
4363 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4364 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
4365 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4366 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4369 /* Probably already got the message from another path,
4370 * destroyed the tunnel and retransmitted to children.
4373 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4376 if (t->id.oid == myid)
4378 GNUNET_break_op (0);
4381 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4383 /* Tunnel was incoming, notify clients */
4384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4385 t->local_tid, t->local_tid_dest);
4386 send_clients_tunnel_destroy (t);
4388 tunnel_send_destroy (t);
4389 t->destroy = GNUNET_YES;
4390 // TODO: add timeout to destroy the tunnel anyway
4396 * Core handler for mesh network traffic going from the origin to a peer
4398 * @param cls closure
4399 * @param peer peer identity this notification is about
4400 * @param message message
4401 * @param atsi performance data
4402 * @param atsi_count number of records in 'atsi'
4403 * @return GNUNET_OK to keep the connection open,
4404 * GNUNET_SYSERR to close it (signal serious error)
4407 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4408 const struct GNUNET_MessageHeader *message,
4409 const struct GNUNET_ATS_Information *atsi,
4410 unsigned int atsi_count)
4412 struct GNUNET_MESH_Unicast *msg;
4413 struct GNUNET_PeerIdentity *neighbor;
4414 struct MeshTunnelChildInfo *cinfo;
4415 struct MeshTunnel *t;
4416 GNUNET_PEER_Id dest_id;
4421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
4423 size = ntohs (message->size);
4425 sizeof (struct GNUNET_MESH_Unicast) +
4426 sizeof (struct GNUNET_MessageHeader))
4431 msg = (struct GNUNET_MESH_Unicast *) message;
4432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4433 ntohs (msg[1].header.type));
4434 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4437 /* TODO notify back: we don't know this tunnel */
4438 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4439 GNUNET_break_op (0);
4442 pid = ntohl (msg->pid);
4445 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4446 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4447 " Already seen pid %u, DROPPING!\n", pid);
4452 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4453 " pid %u not seen yet, forwarding\n", pid);
4455 t->skip += (pid - t->pid) - 1;
4457 tunnel_reset_timeout (t);
4458 dest_id = GNUNET_PEER_search (&msg->destination);
4459 if (dest_id == myid)
4461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4462 " it's for us! sending to clients...\n");
4463 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
4464 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
4465 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK); // FIXME send after client processes the packet
4468 ttl = ntohl (msg->ttl);
4469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4472 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4473 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4477 " not for us, retransmitting...\n");
4478 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4480 neighbor = tree_get_first_hop (t->tree, dest_id);
4481 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
4482 &neighbor->hashPubKey);
4485 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
4486 cinfo->id = GNUNET_PEER_intern (neighbor);
4488 cinfo->max_pid = pid + t->queue_max - t->queue_n; // FIXME review
4490 GNUNET_assert (GNUNET_OK ==
4491 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
4492 &neighbor->hashPubKey,
4494 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
4497 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4500 send_message (message, neighbor, t);
4506 * Core handler for mesh network traffic going from the origin to all peers
4508 * @param cls closure
4509 * @param message message
4510 * @param peer peer identity this notification is about
4511 * @param atsi performance data
4512 * @param atsi_count number of records in 'atsi'
4513 * @return GNUNET_OK to keep the connection open,
4514 * GNUNET_SYSERR to close it (signal serious error)
4516 * TODO: Check who we got this from, to validate route.
4519 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4520 const struct GNUNET_MessageHeader *message,
4521 const struct GNUNET_ATS_Information *atsi,
4522 unsigned int atsi_count)
4524 struct GNUNET_MESH_Multicast *msg;
4525 struct MeshTunnel *t;
4529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
4531 size = ntohs (message->size);
4532 if (sizeof (struct GNUNET_MESH_Multicast) +
4533 sizeof (struct GNUNET_MessageHeader) > size)
4535 GNUNET_break_op (0);
4538 msg = (struct GNUNET_MESH_Multicast *) message;
4539 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4543 /* TODO notify that we dont know that tunnel */
4544 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4545 GNUNET_break_op (0);
4548 pid = ntohl (msg->pid);
4551 /* already seen this packet, drop */
4552 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4553 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4554 " Already seen pid %u, DROPPING!\n", pid);
4559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4560 " pid %u not seen yet, forwarding\n", pid);
4562 t->skip += (pid - t->pid) - 1;
4564 tunnel_reset_timeout (t);
4566 /* Transmit to locally interested clients */
4567 if (NULL != t->peers &&
4568 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
4570 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
4571 send_subscribed_clients (message, &msg[1].header);
4573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
4574 if (ntohl (msg->ttl) == 0)
4576 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4577 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4580 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
4581 tunnel_send_multicast (t, message, GNUNET_NO);
4587 * Core handler for mesh network traffic toward the owner of a tunnel
4589 * @param cls closure
4590 * @param message message
4591 * @param peer peer identity this notification is about
4592 * @param atsi performance data
4593 * @param atsi_count number of records in 'atsi'
4595 * @return GNUNET_OK to keep the connection open,
4596 * GNUNET_SYSERR to close it (signal serious error)
4599 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4600 const struct GNUNET_MessageHeader *message,
4601 const struct GNUNET_ATS_Information *atsi,
4602 unsigned int atsi_count)
4604 struct GNUNET_MESH_ToOrigin *msg;
4605 struct GNUNET_PeerIdentity id;
4606 struct MeshPeerInfo *peer_info;
4607 struct MeshTunnel *t;
4610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
4612 size = ntohs (message->size);
4613 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
4614 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
4616 GNUNET_break_op (0);
4619 msg = (struct GNUNET_MESH_ToOrigin *) message;
4620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4621 ntohs (msg[1].header.type));
4622 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4626 /* TODO notify that we dont know this tunnel (whom)? */
4627 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4628 GNUNET_break_op (0);
4632 if (t->id.oid == myid)
4635 struct GNUNET_MESH_ToOrigin *copy;
4637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4638 " it's for us! sending to clients...\n");
4639 if (NULL == t->owner)
4641 /* got data packet for ownerless tunnel */
4642 GNUNET_STATISTICS_update (stats, "# data on ownerless tunnel",
4644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no clients!\n");
4645 GNUNET_break_op (0);
4648 /* TODO signature verification */
4649 memcpy (cbuf, message, size);
4650 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
4651 copy->tid = htonl (t->local_tid);
4652 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
4653 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
4654 ©->header, GNUNET_YES);
4657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4658 " not for us, retransmitting...\n");
4660 peer_info = peer_info_get (&msg->oid);
4661 if (NULL == peer_info)
4663 /* unknown origin of tunnel */
4667 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4668 send_message (message, &id, t);
4669 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
4676 * Core handler for mesh network traffic point-to-point acks.
4678 * @param cls closure
4679 * @param message message
4680 * @param peer peer identity this notification is about
4681 * @param atsi performance data
4682 * @param atsi_count number of records in 'atsi'
4684 * @return GNUNET_OK to keep the connection open,
4685 * GNUNET_SYSERR to close it (signal serious error)
4688 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4689 const struct GNUNET_MessageHeader *message,
4690 const struct GNUNET_ATS_Information *atsi,
4691 unsigned int atsi_count)
4693 struct GNUNET_MESH_ACK *msg;
4694 struct MeshTunnelChildInfo *cinfo;
4695 struct MeshTunnel *t;
4698 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got an ACK packet from %s\n",
4700 msg = (struct GNUNET_MESH_ACK *) message;
4701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4702 ntohs (msg[1].header.type));
4703 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4707 /* TODO notify that we dont know this tunnel (whom)? */
4708 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4709 GNUNET_break_op (0);
4712 ack = ntohl (msg->pid);
4713 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
4717 GNUNET_break_op (0);
4720 cinfo->max_pid = ack;
4721 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4727 * Core handler for path ACKs
4729 * @param cls closure
4730 * @param message message
4731 * @param peer peer identity this notification is about
4732 * @param atsi performance data
4733 * @param atsi_count number of records in 'atsi'
4735 * @return GNUNET_OK to keep the connection open,
4736 * GNUNET_SYSERR to close it (signal serious error)
4739 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4740 const struct GNUNET_MessageHeader *message,
4741 const struct GNUNET_ATS_Information *atsi,
4742 unsigned int atsi_count)
4744 struct GNUNET_MESH_PathACK *msg;
4745 struct GNUNET_PeerIdentity id;
4746 struct MeshPeerInfo *peer_info;
4747 struct MeshPeerPath *p;
4748 struct MeshTunnel *t;
4750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4751 GNUNET_i2s (&my_full_id));
4752 msg = (struct GNUNET_MESH_PathACK *) message;
4753 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4756 /* TODO notify that we don't know the tunnel */
4757 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4759 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4763 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4765 peer_info = peer_info_get (&msg->peer_id);
4766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4767 GNUNET_i2s (&msg->peer_id));
4768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4771 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
4773 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4774 "connect_by_string completed, stopping search\n");
4775 regex_cancel_search (t->regex_ctx);
4776 t->regex_ctx = NULL;
4779 /* Add paths to peers? */
4780 p = tree_get_path_to_peer (t->tree, peer_info->id);
4783 path_add_to_peers (p, GNUNET_YES);
4791 /* Message for us? */
4792 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4794 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4795 if (NULL == t->owner)
4797 GNUNET_break_op (0);
4800 if (NULL != t->dht_get_type)
4802 GNUNET_DHT_get_stop (t->dht_get_type);
4803 t->dht_get_type = NULL;
4805 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
4807 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
4808 send_client_peer_connected (t, peer_info->id);
4813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4814 " not for us, retransmitting...\n");
4815 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4816 peer_info = peer_info_get (&msg->oid);
4817 if (NULL == peer_info)
4819 /* If we know the tunnel, we should DEFINITELY know the peer */
4823 send_message (message, &id, t);
4829 * Functions to handle messages from core
4831 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4832 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4833 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
4834 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4835 sizeof (struct GNUNET_MESH_PathBroken)},
4836 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4837 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4838 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4839 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4840 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4841 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4842 sizeof (struct GNUNET_MESH_ACK)},
4843 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4844 sizeof (struct GNUNET_MESH_PathACK)},
4850 /******************************************************************************/
4851 /**************** MESH LOCAL HANDLER HELPERS ***********************/
4852 /******************************************************************************/
4855 * deregister_app: iterator for removing each application registered by a client
4857 * @param cls closure
4858 * @param key the hash of the application id (used to access the hashmap)
4859 * @param value the value stored at the key (client)
4861 * @return GNUNET_OK on success
4864 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
4866 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
4867 GNUNET_break (GNUNET_YES ==
4868 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
4874 * notify_client_connection_failure: notify a client that the connection to the
4875 * requested remote peer is not possible (for instance, no route found)
4876 * Function called when the socket is ready to queue more data. "buf" will be
4877 * NULL and "size" zero if the socket was closed for writing in the meantime.
4879 * @param cls closure
4880 * @param size number of bytes available in buf
4881 * @param buf where the callee should write the message
4882 * @return number of bytes written to buf
4885 notify_client_connection_failure (void *cls, size_t size, void *buf)
4888 struct MeshPeerInfo *peer_info;
4889 struct GNUNET_MESH_PeerControl *msg;
4890 struct GNUNET_PeerIdentity id;
4892 if (0 == size && NULL == buf)
4894 // TODO retry? cancel?
4898 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
4899 peer_info = (struct MeshPeerInfo *) cls;
4900 msg = (struct GNUNET_MESH_PeerControl *) buf;
4901 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
4902 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
4903 // msg->tunnel_id = htonl(peer_info->t->tid);
4904 GNUNET_PEER_resolve (peer_info->id, &id);
4905 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
4913 * Send keepalive packets for a peer
4915 * @param cls Closure (tunnel for which to send the keepalive).
4916 * @param tc Notification context.
4918 * TODO: implement explicit multicast keepalive?
4921 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4923 struct MeshTunnel *t = cls;
4924 struct GNUNET_MessageHeader *payload;
4925 struct GNUNET_MESH_Multicast *msg;
4927 sizeof (struct GNUNET_MESH_Multicast) +
4928 sizeof (struct GNUNET_MessageHeader);
4931 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4935 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
4937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4938 "sending keepalive for tunnel %d\n", t->id.tid);
4940 msg = (struct GNUNET_MESH_Multicast *) cbuf;
4941 msg->header.size = htons (size);
4942 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
4943 msg->oid = my_full_id;
4944 msg->tid = htonl (t->id.tid);
4945 msg->ttl = htonl (default_ttl);
4946 msg->pid = htonl (t->pid + 1);
4948 payload = (struct GNUNET_MessageHeader *) &msg[1];
4949 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
4950 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
4951 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
4953 t->path_refresh_task =
4954 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
4960 * Function to process paths received for a new peer addition. The recorded
4961 * paths form the initial tunnel, which can be optimized later.
4962 * Called on each result obtained for the DHT search.
4964 * @param cls closure
4965 * @param exp when will this value expire
4966 * @param key key of the result
4967 * @param get_path path of the get request
4968 * @param get_path_length lenght of get_path
4969 * @param put_path path of the put request
4970 * @param put_path_length length of the put_path
4971 * @param type type of the result
4972 * @param size number of bytes in data
4973 * @param data pointer to the result data
4975 * TODO: re-issue the request after certain time? cancel after X results?
4978 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4979 const struct GNUNET_HashCode * key,
4980 const struct GNUNET_PeerIdentity *get_path,
4981 unsigned int get_path_length,
4982 const struct GNUNET_PeerIdentity *put_path,
4983 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4984 size_t size, const void *data)
4986 struct MeshPathInfo *path_info = cls;
4987 struct MeshPeerPath *p;
4988 struct GNUNET_PeerIdentity pi;
4991 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4992 GNUNET_PEER_resolve (path_info->peer->id, &pi);
4993 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4995 p = path_build_from_dht (get_path, get_path_length, put_path,
4997 path_add_to_peers (p, GNUNET_NO);
4999 for (i = 0; i < path_info->peer->ntunnels; i++)
5001 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
5002 peer_info_connect (path_info->peer, path_info->t);
5010 * Function to process paths received for a new peer addition. The recorded
5011 * paths form the initial tunnel, which can be optimized later.
5012 * Called on each result obtained for the DHT search.
5014 * @param cls closure
5015 * @param exp when will this value expire
5016 * @param key key of the result
5017 * @param get_path path of the get request
5018 * @param get_path_length lenght of get_path
5019 * @param put_path path of the put request
5020 * @param put_path_length length of the put_path
5021 * @param type type of the result
5022 * @param size number of bytes in data
5023 * @param data pointer to the result data
5026 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5027 const struct GNUNET_HashCode * key,
5028 const struct GNUNET_PeerIdentity *get_path,
5029 unsigned int get_path_length,
5030 const struct GNUNET_PeerIdentity *put_path,
5031 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5032 size_t size, const void *data)
5034 const struct PBlock *pb = data;
5035 const struct GNUNET_PeerIdentity *pi = &pb->id;
5036 struct MeshTunnel *t = cls;
5037 struct MeshPeerInfo *peer_info;
5038 struct MeshPeerPath *p;
5040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
5041 if (size != sizeof (struct PBlock))
5043 GNUNET_break_op (0);
5046 if (ntohl(pb->type) != t->type)
5048 GNUNET_break_op (0);
5051 GNUNET_assert (NULL != t->owner);
5052 peer_info = peer_info_get (pi);
5053 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
5055 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
5057 p = path_build_from_dht (get_path, get_path_length, put_path,
5059 path_add_to_peers (p, GNUNET_NO);
5061 tunnel_add_peer (t, peer_info);
5062 peer_info_connect (peer_info, t);
5067 * Function to process DHT string to regex matching.
5068 * Called on each result obtained for the DHT search.
5070 * @param cls closure (search context)
5071 * @param exp when will this value expire
5072 * @param key key of the result
5073 * @param get_path path of the get request (not used)
5074 * @param get_path_length lenght of get_path (not used)
5075 * @param put_path path of the put request (not used)
5076 * @param put_path_length length of the put_path (not used)
5077 * @param type type of the result
5078 * @param size number of bytes in data
5079 * @param data pointer to the result data
5082 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5083 const struct GNUNET_HashCode * key,
5084 const struct GNUNET_PeerIdentity *get_path,
5085 unsigned int get_path_length,
5086 const struct GNUNET_PeerIdentity *put_path,
5087 unsigned int put_path_length,
5088 enum GNUNET_BLOCK_Type type,
5089 size_t size, const void *data)
5091 const struct MeshRegexAccept *block = data;
5092 struct MeshRegexSearchContext *ctx = cls;
5093 struct MeshRegexSearchInfo *info = ctx->info;
5094 struct MeshPeerPath *p;
5095 struct MeshPeerInfo *peer_info;
5097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
5098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
5100 peer_info = peer_info_get(&block->id);
5101 p = path_build_from_dht (get_path, get_path_length, put_path,
5103 path_add_to_peers (p, GNUNET_NO);
5106 tunnel_add_peer (info->t, peer_info);
5107 peer_info_connect (peer_info, info->t);
5108 if (0 == info->peer)
5110 info->peer = peer_info->id;
5114 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
5117 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
5118 ®ex_connect_timeout,
5126 * Function to process DHT string to regex matching.
5127 * Called on each result obtained for the DHT search.
5129 * @param cls closure (search context)
5130 * @param exp when will this value expire
5131 * @param key key of the result
5132 * @param get_path path of the get request (not used)
5133 * @param get_path_length lenght of get_path (not used)
5134 * @param put_path path of the put request (not used)
5135 * @param put_path_length length of the put_path (not used)
5136 * @param type type of the result
5137 * @param size number of bytes in data
5138 * @param data pointer to the result data
5140 * TODO: re-issue the request after certain time? cancel after X results?
5143 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5144 const struct GNUNET_HashCode * key,
5145 const struct GNUNET_PeerIdentity *get_path,
5146 unsigned int get_path_length,
5147 const struct GNUNET_PeerIdentity *put_path,
5148 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5149 size_t size, const void *data)
5151 const struct MeshRegexBlock *block = data;
5152 struct MeshRegexSearchContext *ctx = cls;
5153 struct MeshRegexSearchInfo *info = ctx->info;
5157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5158 "DHT GET STRING RETURNED RESULTS\n");
5159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5160 " key: %s\n", GNUNET_h2s (key));
5162 copy = GNUNET_malloc (size);
5163 memcpy (copy, data, size);
5164 GNUNET_break (GNUNET_OK ==
5165 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
5166 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
5167 len = ntohl (block->n_proof);
5169 char proof[len + 1];
5171 memcpy (proof, &block[1], len);
5173 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
5175 GNUNET_break_op (0);
5179 len = strlen (info->description);
5180 if (len == ctx->position) // String processed
5182 if (GNUNET_YES == ntohl (block->accepting))
5184 regex_find_path(key, ctx);
5188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
5189 // FIXME REGEX this block not successful, wait for more? start timeout?
5193 GNUNET_break (GNUNET_OK ==
5194 GNUNET_MESH_regex_block_iterate (block, size,
5195 ®ex_edge_iterator, ctx));
5199 /******************************************************************************/
5200 /********************* MESH LOCAL HANDLES **************************/
5201 /******************************************************************************/
5205 * Handler for client disconnection
5207 * @param cls closure
5208 * @param client identification of the client; NULL
5209 * for the last call when the server is destroyed
5212 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
5214 struct MeshClient *c;
5215 struct MeshClient *next;
5218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
5221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
5227 if (c->handle != client)
5229 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
5233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
5235 GNUNET_SERVER_client_drop (c->handle);
5236 c->shutting_down = GNUNET_YES;
5237 GNUNET_assert (NULL != c->own_tunnels);
5238 GNUNET_assert (NULL != c->incoming_tunnels);
5239 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
5240 &tunnel_destroy_iterator, c);
5241 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
5242 &tunnel_destroy_iterator, c);
5243 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
5244 &tunnel_destroy_iterator, c);
5245 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
5246 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
5247 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
5249 /* deregister clients applications */
5250 if (NULL != c->apps)
5252 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
5253 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
5255 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
5256 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
5258 GNUNET_SCHEDULER_cancel (announce_applications_task);
5259 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
5261 if (NULL != c->types)
5262 GNUNET_CONTAINER_multihashmap_destroy (c->types);
5263 for (i = 0; i < c->n_regex; i++)
5265 GNUNET_free (c->regexes[i]);
5267 GNUNET_free_non_null (c->regexes);
5268 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
5269 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
5271 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
5272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
5274 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
5277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
5283 * Handler for new clients
5285 * @param cls closure
5286 * @param client identification of the client
5287 * @param message the actual message, which includes messages the client wants
5290 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
5291 const struct GNUNET_MessageHeader *message)
5293 struct GNUNET_MESH_ClientConnect *cc_msg;
5294 struct MeshClient *c;
5295 GNUNET_MESH_ApplicationType *a;
5302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
5303 /* Check data sanity */
5304 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
5305 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
5306 ntypes = ntohs (cc_msg->types);
5307 napps = ntohs (cc_msg->applications);
5309 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
5312 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5316 /* Create new client structure */
5317 c = GNUNET_malloc (sizeof (struct MeshClient));
5318 c->id = next_client_id++;
5319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
5321 GNUNET_SERVER_client_keep (client);
5322 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
5325 GNUNET_MESH_ApplicationType at;
5326 struct GNUNET_HashCode hc;
5328 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
5329 for (i = 0; i < napps; i++)
5332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
5333 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
5334 /* store in clients hashmap */
5335 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
5336 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5337 /* store in global hashmap, for announcements */
5338 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
5339 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5341 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
5342 announce_applications_task =
5343 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
5349 struct GNUNET_HashCode hc;
5351 t = (uint16_t *) & a[napps];
5352 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
5353 for (i = 0; i < ntypes; i++)
5356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
5357 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
5359 /* store in clients hashmap */
5360 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
5361 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5362 /* store in global hashmap */
5363 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
5364 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5368 " client has %u+%u subscriptions\n", napps, ntypes);
5370 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
5371 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5372 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5373 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5374 GNUNET_SERVER_notification_context_add (nc, client);
5375 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
5377 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
5383 * Handler for clients announcing available services by a regular expression.
5385 * @param cls closure
5386 * @param client identification of the client
5387 * @param message the actual message, which includes messages the client wants
5390 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
5391 const struct GNUNET_MessageHeader *message)
5393 struct MeshClient *c;
5397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
5399 /* Sanity check for client registration */
5400 if (NULL == (c = client_get (client)))
5403 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5408 len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
5409 regex = GNUNET_malloc (len + 1);
5410 memcpy (regex, &message[1], len);
5412 GNUNET_array_append (c->regexes, c->n_regex, regex);
5413 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
5415 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
5421 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5422 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
5427 * Handler for requests of new tunnels
5429 * @param cls closure
5430 * @param client identification of the client
5431 * @param message the actual message
5434 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
5435 const struct GNUNET_MessageHeader *message)
5437 struct GNUNET_MESH_TunnelMessage *t_msg;
5438 struct MeshTunnel *t;
5439 struct MeshClient *c;
5441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
5443 /* Sanity check for client registration */
5444 if (NULL == (c = client_get (client)))
5447 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5450 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5452 /* Message sanity check */
5453 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5456 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5460 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5461 /* Sanity check for tunnel numbering */
5462 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
5465 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5468 /* Sanity check for duplicate tunnel IDs */
5469 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
5472 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5476 while (NULL != tunnel_get_by_pi (myid, next_tid))
5477 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5478 t = tunnel_new (myid, next_tid++, c, ntohl (t_msg->tunnel_id));
5481 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
5482 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5485 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
5487 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
5488 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
5490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
5491 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5497 * Handler for requests of deleting tunnels
5499 * @param cls closure
5500 * @param client identification of the client
5501 * @param message the actual message
5504 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
5505 const struct GNUNET_MessageHeader *message)
5507 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5508 struct MeshClient *c;
5509 struct MeshTunnel *t;
5510 MESH_TunnelNumber tid;
5512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5513 "Got a DESTROY TUNNEL from client!\n");
5515 /* Sanity check for client registration */
5516 if (NULL == (c = client_get (client)))
5519 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5522 /* Message sanity check */
5523 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5526 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5530 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5532 /* Retrieve tunnel */
5533 tid = ntohl (tunnel_msg->tunnel_id);
5534 t = tunnel_get_by_local_id(c, tid);
5538 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5539 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5542 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5544 client_ignore_tunnel (c, t);
5546 // TODO: when to destroy incoming tunnel?
5547 if (t->nclients == 0)
5549 GNUNET_assert (GNUNET_YES ==
5550 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
5552 GNUNET_assert (GNUNET_YES ==
5553 GNUNET_CONTAINER_multihashmap_remove (t->peers,
5554 &my_full_id.hashPubKey,
5558 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5561 send_client_tunnel_disconnect(t, c);
5562 client_delete_tunnel(c, t);
5564 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
5566 tunnel_send_destroy (t);
5567 t->destroy = GNUNET_YES;
5568 // The tunnel will be destroyed when the last message is transmitted.
5569 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5575 * Handler for requests of seeting tunnel's speed.
5577 * @param cls Closure (unused).
5578 * @param client Identification of the client.
5579 * @param message The actual message.
5582 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
5583 const struct GNUNET_MessageHeader *message)
5585 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5586 struct MeshClient *c;
5587 struct MeshTunnel *t;
5588 MESH_TunnelNumber tid;
5590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5591 "Got a SPEED request from client!\n");
5593 /* Sanity check for client registration */
5594 if (NULL == (c = client_get (client)))
5597 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5602 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5604 /* Retrieve tunnel */
5605 tid = ntohl (tunnel_msg->tunnel_id);
5606 t = tunnel_get_by_local_id(c, tid);
5610 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5611 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5615 switch (ntohs(message->type))
5617 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
5618 t->speed_min = GNUNET_YES;
5620 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
5621 t->speed_min = GNUNET_NO;
5626 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5631 * Handler for requests of seeting tunnel's buffering policy.
5633 * @param cls Closure (unused).
5634 * @param client Identification of the client.
5635 * @param message The actual message.
5638 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
5639 const struct GNUNET_MessageHeader *message)
5641 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5642 struct MeshClient *c;
5643 struct MeshTunnel *t;
5644 MESH_TunnelNumber tid;
5646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5647 "Got a BUFFER request from client!\n");
5649 /* Sanity check for client registration */
5650 if (NULL == (c = client_get (client)))
5653 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5658 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5660 /* Retrieve tunnel */
5661 tid = ntohl (tunnel_msg->tunnel_id);
5662 t = tunnel_get_by_local_id(c, tid);
5666 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5667 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5671 switch (ntohs(message->type))
5673 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
5674 t->nobuffer = GNUNET_NO;
5676 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
5677 t->nobuffer = GNUNET_YES;
5683 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5688 * Handler for connection requests to new peers
5690 * @param cls closure
5691 * @param client identification of the client
5692 * @param message the actual message (PeerControl)
5695 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
5696 const struct GNUNET_MessageHeader *message)
5698 struct GNUNET_MESH_PeerControl *peer_msg;
5699 struct MeshPeerInfo *peer_info;
5700 struct MeshClient *c;
5701 struct MeshTunnel *t;
5702 MESH_TunnelNumber tid;
5704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
5705 /* Sanity check for client registration */
5706 if (NULL == (c = client_get (client)))
5709 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5713 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5714 /* Sanity check for message size */
5715 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5718 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5722 /* Tunnel exists? */
5723 tid = ntohl (peer_msg->tunnel_id);
5724 t = tunnel_get_by_local_id (c, tid);
5728 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5732 /* Does client own tunnel? */
5733 if (t->owner->handle != client)
5736 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5739 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
5740 GNUNET_i2s (&peer_msg->peer));
5741 peer_info = peer_info_get (&peer_msg->peer);
5743 tunnel_add_peer (t, peer_info);
5744 peer_info_connect (peer_info, t);
5746 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5752 * Handler for disconnection requests of peers in a tunnel
5754 * @param cls closure
5755 * @param client identification of the client
5756 * @param message the actual message (PeerControl)
5759 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
5760 const struct GNUNET_MessageHeader *message)
5762 struct GNUNET_MESH_PeerControl *peer_msg;
5763 struct MeshPeerInfo *peer_info;
5764 struct MeshClient *c;
5765 struct MeshTunnel *t;
5766 MESH_TunnelNumber tid;
5768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
5769 /* Sanity check for client registration */
5770 if (NULL == (c = client_get (client)))
5773 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5776 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5777 /* Sanity check for message size */
5778 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5781 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5785 /* Tunnel exists? */
5786 tid = ntohl (peer_msg->tunnel_id);
5787 t = tunnel_get_by_local_id (c, tid);
5791 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5794 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5796 /* Does client own tunnel? */
5797 if (t->owner->handle != client)
5800 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
5805 GNUNET_i2s (&peer_msg->peer));
5806 /* Is the peer in the tunnel? */
5808 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
5809 if (NULL == peer_info)
5812 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5816 /* Ok, delete peer from tunnel */
5817 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
5818 &peer_msg->peer.hashPubKey);
5820 send_destroy_path (t, peer_info->id);
5821 tunnel_delete_peer (t, peer_info->id);
5822 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5827 * Handler for blacklist requests of peers in a tunnel
5829 * @param cls closure
5830 * @param client identification of the client
5831 * @param message the actual message (PeerControl)
5834 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
5835 const struct GNUNET_MessageHeader *message)
5837 struct GNUNET_MESH_PeerControl *peer_msg;
5838 struct MeshClient *c;
5839 struct MeshTunnel *t;
5840 MESH_TunnelNumber tid;
5842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
5843 /* Sanity check for client registration */
5844 if (NULL == (c = client_get (client)))
5847 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5850 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5852 /* Sanity check for message size */
5853 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5856 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5860 /* Tunnel exists? */
5861 tid = ntohl (peer_msg->tunnel_id);
5862 t = tunnel_get_by_local_id (c, tid);
5866 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5871 GNUNET_array_append(t->blacklisted, t->nblacklisted,
5872 GNUNET_PEER_intern(&peer_msg->peer));
5877 * Handler for unblacklist requests of peers in a tunnel
5879 * @param cls closure
5880 * @param client identification of the client
5881 * @param message the actual message (PeerControl)
5884 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
5885 const struct GNUNET_MessageHeader *message)
5887 struct GNUNET_MESH_PeerControl *peer_msg;
5888 struct MeshClient *c;
5889 struct MeshTunnel *t;
5890 MESH_TunnelNumber tid;
5894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
5895 /* Sanity check for client registration */
5896 if (NULL == (c = client_get (client)))
5899 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5902 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5904 /* Sanity check for message size */
5905 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5908 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5912 /* Tunnel exists? */
5913 tid = ntohl (peer_msg->tunnel_id);
5914 t = tunnel_get_by_local_id (c, tid);
5918 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5923 /* if peer is not known, complain */
5924 pid = GNUNET_PEER_search (&peer_msg->peer);
5931 /* search and remove from list */
5932 for (i = 0; i < t->nblacklisted; i++)
5934 if (t->blacklisted[i] == pid)
5936 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
5937 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
5942 /* if peer hasn't been blacklisted, complain */
5948 * Handler for connection requests to new peers by type
5950 * @param cls closure
5951 * @param client identification of the client
5952 * @param message the actual message (ConnectPeerByType)
5955 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
5956 const struct GNUNET_MessageHeader *message)
5958 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
5959 struct MeshClient *c;
5960 struct MeshTunnel *t;
5961 struct GNUNET_HashCode hash;
5962 MESH_TunnelNumber tid;
5964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
5965 /* Sanity check for client registration */
5966 if (NULL == (c = client_get (client)))
5969 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5973 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
5974 /* Sanity check for message size */
5975 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
5976 ntohs (connect_msg->header.size))
5979 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5983 /* Tunnel exists? */
5984 tid = ntohl (connect_msg->tunnel_id);
5985 t = tunnel_get_by_local_id (c, tid);
5989 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5993 /* Does client own tunnel? */
5994 if (t->owner->handle != client)
5997 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6001 /* Do WE have the service? */
6002 t->type = ntohl (connect_msg->type);
6003 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
6004 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
6005 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
6008 /* Yes! Fast forward, add ourselves to the tunnel and send the
6009 * good news to the client, and alert the destination client of
6010 * an incoming tunnel.
6012 * FIXME send a path create to self, avoid code duplication
6014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
6015 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
6016 peer_info_get (&my_full_id),
6017 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
6020 send_client_peer_connected (t, myid);
6021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
6022 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6024 t->local_tid_dest = next_local_tid++;
6025 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
6026 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
6027 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6031 /* Ok, lets find a peer offering the service */
6032 if (NULL != t->dht_get_type)
6034 GNUNET_DHT_get_stop (t->dht_get_type);
6036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
6037 GNUNET_h2s (&hash));
6039 GNUNET_DHT_get_start (dht_handle,
6040 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
6042 dht_replication_level,
6043 GNUNET_DHT_RO_RECORD_ROUTE |
6044 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6046 &dht_get_type_handler, t);
6048 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6054 * Handler for connection requests to new peers by a string service description.
6056 * @param cls closure
6057 * @param client identification of the client
6058 * @param message the actual message, which includes messages the client wants
6061 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
6062 const struct GNUNET_MessageHeader *message)
6064 struct GNUNET_MESH_ConnectPeerByString *msg;
6065 struct MeshRegexSearchContext *ctx;
6066 struct MeshRegexSearchInfo *info;
6067 struct GNUNET_DHT_GetHandle *get_h;
6068 struct GNUNET_HashCode key;
6069 struct MeshTunnel *t;
6070 struct MeshClient *c;
6071 MESH_TunnelNumber tid;
6075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6076 "Connect by string started\n");
6077 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
6078 size = htons (message->size);
6080 /* Sanity check for client registration */
6081 if (NULL == (c = client_get (client)))
6084 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6088 /* Message size sanity check */
6089 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
6092 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6096 /* Tunnel exists? */
6097 tid = ntohl (msg->tunnel_id);
6098 t = tunnel_get_by_local_id (c, tid);
6102 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6106 /* Does client own tunnel? */
6107 if (t->owner->handle != client)
6110 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6115 " on tunnel %s [%u]\n",
6116 GNUNET_i2s(&my_full_id),
6119 /* Only one connect_by_string allowed at the same time! */
6120 /* FIXME: allow more, return handle at api level to cancel, document */
6121 if (NULL != t->regex_ctx)
6124 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6128 /* Find string itself */
6129 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
6130 string = (const char *) &msg[1];
6132 /* Initialize context */
6133 size = GNUNET_REGEX_get_first_key(string, len, &key);
6134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6135 " consumed %u bits out of %u\n", size, len);
6136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6137 " looking for %s\n", GNUNET_h2s (&key));
6139 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
6141 info->description = GNUNET_malloc (len + 1);
6142 memcpy (info->description, string, len);
6143 info->description[len] = '\0';
6144 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32);
6145 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32);
6146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
6148 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
6149 ctx->position = size;
6153 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
6155 /* Start search in DHT */
6156 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
6157 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
6158 &key, /* key to search */
6159 dht_replication_level, /* replication level */
6160 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6161 NULL, /* xquery */ // FIXME BLOOMFILTER
6162 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
6163 &dht_get_string_handler, ctx);
6165 GNUNET_break (GNUNET_OK ==
6166 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
6169 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
6171 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
6177 * Handler for client traffic directed to one peer
6179 * @param cls closure
6180 * @param client identification of the client
6181 * @param message the actual message
6184 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
6185 const struct GNUNET_MessageHeader *message)
6187 struct MeshClient *c;
6188 struct MeshTunnel *t;
6189 struct MeshPeerInfo *pi;
6190 struct GNUNET_MESH_Unicast *data_msg;
6191 MESH_TunnelNumber tid;
6194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6195 "Got a unicast request from a client!\n");
6197 /* Sanity check for client registration */
6198 if (NULL == (c = client_get (client)))
6201 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6204 data_msg = (struct GNUNET_MESH_Unicast *) message;
6205 /* Sanity check for message size */
6206 size = ntohs (message->size);
6207 if (sizeof (struct GNUNET_MESH_Unicast) +
6208 sizeof (struct GNUNET_MessageHeader) > size)
6211 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6215 /* Tunnel exists? */
6216 tid = ntohl (data_msg->tid);
6217 t = tunnel_get_by_local_id (c, tid);
6221 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6225 /* Is it a local tunnel? Then, does client own the tunnel? */
6226 if (t->owner->handle != client)
6229 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6233 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
6234 &data_msg->destination.hashPubKey);
6235 /* Is the selected peer in the tunnel? */
6239 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6243 /* Ok, everything is correct, send the message
6244 * (pretend we got it from a mesh peer)
6247 char buf[ntohs (message->size)] GNUNET_ALIGN;
6248 struct GNUNET_MESH_Unicast *copy;
6250 /* Work around const limitation */
6251 copy = (struct GNUNET_MESH_Unicast *) buf;
6252 memcpy (buf, data_msg, size);
6253 copy->oid = my_full_id;
6254 copy->tid = htonl (t->id.tid);
6255 copy->ttl = htonl (default_ttl);
6256 copy->pid = htonl (t->pid + 1);
6257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6258 " calling generic handler...\n");
6259 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
6260 send_client_tunnel_ack (t->owner, t);
6262 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6268 * Handler for client traffic directed to the origin
6270 * @param cls closure
6271 * @param client identification of the client
6272 * @param message the actual message
6275 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
6276 const struct GNUNET_MessageHeader *message)
6278 struct GNUNET_MESH_ToOrigin *data_msg;
6279 struct GNUNET_PeerIdentity id;
6280 struct MeshClient *c;
6281 struct MeshTunnel *t;
6282 MESH_TunnelNumber tid;
6285 /* Sanity check for client registration */
6286 if (NULL == (c = client_get (client)))
6289 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6292 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
6293 /* Sanity check for message size */
6294 size = ntohs (message->size);
6295 if (sizeof (struct GNUNET_MESH_ToOrigin) +
6296 sizeof (struct GNUNET_MessageHeader) > size)
6299 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6303 /* Tunnel exists? */
6304 tid = ntohl (data_msg->tid);
6305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6306 "Got a ToOrigin request from a client! Tunnel %X\n", tid);
6307 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6310 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6313 t = tunnel_get_by_local_id (c, tid);
6317 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6321 /* It should be sent by someone who has this as incoming tunnel. */
6322 if (-1 == client_knows_tunnel (c, t))
6325 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6328 GNUNET_PEER_resolve (t->id.oid, &id);
6330 /* Ok, everything is correct, send the message
6331 * (pretend we got it from a mesh peer)
6334 char buf[ntohs (message->size)] GNUNET_ALIGN;
6335 struct GNUNET_MESH_ToOrigin *copy;
6337 /* Work around const limitation */
6338 copy = (struct GNUNET_MESH_ToOrigin *) buf;
6339 memcpy (buf, data_msg, size);
6341 copy->tid = htonl (t->id.tid);
6342 copy->sender = my_full_id;
6343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6344 " calling generic handler...\n");
6345 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
6347 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6353 * Handler for client traffic directed to all peers in a tunnel
6355 * @param cls closure
6356 * @param client identification of the client
6357 * @param message the actual message
6360 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
6361 const struct GNUNET_MessageHeader *message)
6363 struct MeshClient *c;
6364 struct MeshTunnel *t;
6365 struct GNUNET_MESH_Multicast *data_msg;
6366 MESH_TunnelNumber tid;
6368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6369 "Got a multicast request from a client!\n");
6371 /* Sanity check for client registration */
6372 if (NULL == (c = client_get (client)))
6375 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6378 data_msg = (struct GNUNET_MESH_Multicast *) message;
6379 /* Sanity check for message size */
6380 if (sizeof (struct GNUNET_MESH_Multicast) +
6381 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
6384 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6388 /* Tunnel exists? */
6389 tid = ntohl (data_msg->tid);
6390 t = tunnel_get_by_local_id (c, tid);
6394 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6398 /* Does client own tunnel? */
6399 if (t->owner->handle != client)
6402 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6407 char buf[ntohs (message->size)] GNUNET_ALIGN;
6408 struct GNUNET_MESH_Multicast *copy;
6410 copy = (struct GNUNET_MESH_Multicast *) buf;
6411 memcpy (buf, message, ntohs (message->size));
6412 copy->oid = my_full_id;
6413 copy->tid = htonl (t->id.tid);
6414 copy->ttl = htonl (default_ttl);
6415 copy->pid = htonl (t->pid + 1);
6416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6417 " calling generic handler...\n");
6418 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
6421 /* receive done gets called when last copy is sent to a neighbor */
6427 * Functions to handle messages from clients
6429 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
6430 {&handle_local_new_client, NULL,
6431 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
6432 {&handle_local_announce_regex, NULL,
6433 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
6434 {&handle_local_tunnel_create, NULL,
6435 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
6436 sizeof (struct GNUNET_MESH_TunnelMessage)},
6437 {&handle_local_tunnel_destroy, NULL,
6438 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
6439 sizeof (struct GNUNET_MESH_TunnelMessage)},
6440 {&handle_local_tunnel_speed, NULL,
6441 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
6442 sizeof (struct GNUNET_MESH_TunnelMessage)},
6443 {&handle_local_tunnel_speed, NULL,
6444 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
6445 sizeof (struct GNUNET_MESH_TunnelMessage)},
6446 {&handle_local_tunnel_buffer, NULL,
6447 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
6448 sizeof (struct GNUNET_MESH_TunnelMessage)},
6449 {&handle_local_tunnel_buffer, NULL,
6450 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
6451 sizeof (struct GNUNET_MESH_TunnelMessage)},
6452 {&handle_local_connect_add, NULL,
6453 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
6454 sizeof (struct GNUNET_MESH_PeerControl)},
6455 {&handle_local_connect_del, NULL,
6456 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
6457 sizeof (struct GNUNET_MESH_PeerControl)},
6458 {&handle_local_blacklist, NULL,
6459 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
6460 sizeof (struct GNUNET_MESH_PeerControl)},
6461 {&handle_local_unblacklist, NULL,
6462 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
6463 sizeof (struct GNUNET_MESH_PeerControl)},
6464 {&handle_local_connect_by_type, NULL,
6465 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
6466 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
6467 {&handle_local_connect_by_string, NULL,
6468 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
6469 {&handle_local_unicast, NULL,
6470 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
6471 {&handle_local_to_origin, NULL,
6472 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
6473 {&handle_local_multicast, NULL,
6474 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
6480 * To be called on core init/fail.
6482 * @param cls service closure
6483 * @param server handle to the server for this service
6484 * @param identity the public identity of this peer
6487 core_init (void *cls, struct GNUNET_CORE_Handle *server,
6488 const struct GNUNET_PeerIdentity *identity)
6490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
6491 core_handle = server;
6492 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
6495 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
6496 GNUNET_SCHEDULER_shutdown ();
6503 * Method called whenever a given peer connects.
6505 * @param cls closure
6506 * @param peer peer identity this notification is about
6507 * @param atsi performance data for the connection
6508 * @param atsi_count number of records in 'atsi'
6511 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
6512 const struct GNUNET_ATS_Information *atsi,
6513 unsigned int atsi_count)
6515 struct MeshPeerInfo *peer_info;
6516 struct MeshPeerPath *path;
6518 DEBUG_CONN ("Peer connected\n");
6519 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
6520 peer_info = peer_info_get (peer);
6521 if (myid == peer_info->id)
6523 DEBUG_CONN (" (self)\n");
6528 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
6530 path = path_new (2);
6531 path->peers[0] = myid;
6532 path->peers[1] = peer_info->id;
6533 GNUNET_PEER_change_rc (myid, 1);
6534 GNUNET_PEER_change_rc (peer_info->id, 1);
6535 peer_info_add_path (peer_info, path, GNUNET_YES);
6536 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
6542 * Method called whenever a peer disconnects.
6544 * @param cls closure
6545 * @param peer peer identity this notification is about
6548 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
6550 struct MeshPeerInfo *pi;
6551 struct MeshPeerQueue *q;
6552 struct MeshPeerQueue *n;
6554 DEBUG_CONN ("Peer disconnected\n");
6555 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
6567 /* try to reroute this traffic instead */
6568 queue_destroy(q, GNUNET_YES);
6572 peer_info_remove_path (pi, pi->id, myid);
6575 DEBUG_CONN (" (self)\n");
6577 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
6582 /******************************************************************************/
6583 /************************ MAIN FUNCTIONS ****************************/
6584 /******************************************************************************/
6587 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
6589 * @param cls closure
6590 * @param key current key code
6591 * @param value value in the hash map
6592 * @return GNUNET_YES if we should continue to iterate,
6596 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
6598 struct MeshTunnel *t = value;
6605 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
6607 * @param cls closure
6608 * @param key current key code
6609 * @param value value in the hash map
6610 * @return GNUNET_YES if we should continue to iterate,
6614 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
6616 struct MeshPeerInfo *p = value;
6617 struct MeshPeerQueue *q;
6618 struct MeshPeerQueue *n;
6626 queue_destroy(q, GNUNET_YES);
6630 peer_info_destroy (p);
6635 * Task run during shutdown.
6641 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
6645 if (core_handle != NULL)
6647 GNUNET_CORE_disconnect (core_handle);
6650 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
6651 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
6652 if (dht_handle != NULL)
6654 GNUNET_DHT_disconnect (dht_handle);
6659 GNUNET_SERVER_notification_context_destroy (nc);
6662 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
6664 GNUNET_SCHEDULER_cancel (announce_id_task);
6665 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
6667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
6671 * Process mesh requests.
6673 * @param cls closure
6674 * @param server the initialized server
6675 * @param c configuration to use
6678 run (void *cls, struct GNUNET_SERVER_Handle *server,
6679 const struct GNUNET_CONFIGURATION_Handle *c)
6681 struct MeshPeerInfo *peer;
6682 struct MeshPeerPath *p;
6685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
6686 server_handle = server;
6687 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
6688 NULL, /* Closure passed to MESH functions */
6689 &core_init, /* Call core_init once connected */
6690 &core_connect, /* Handle connects */
6691 &core_disconnect, /* remove peers on disconnects */
6692 NULL, /* Don't notify about all incoming messages */
6693 GNUNET_NO, /* For header only in notification */
6694 NULL, /* Don't notify about all outbound messages */
6695 GNUNET_NO, /* For header-only out notification */
6696 core_handlers); /* Register these handlers */
6698 if (core_handle == NULL)
6701 GNUNET_SCHEDULER_shutdown ();
6706 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
6709 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6711 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6713 GNUNET_SCHEDULER_shutdown ();
6718 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
6719 &refresh_path_time))
6721 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6723 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6724 "refresh path time");
6725 GNUNET_SCHEDULER_shutdown ();
6730 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
6731 &app_announce_time))
6733 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6735 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6736 "app announce time");
6737 GNUNET_SCHEDULER_shutdown ();
6742 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
6745 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6747 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6748 "id announce time");
6749 GNUNET_SCHEDULER_shutdown ();
6754 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
6755 &unacknowledged_wait_time))
6757 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6759 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6760 "unacknowledged wait time");
6761 GNUNET_SCHEDULER_shutdown ();
6766 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
6769 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6771 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6773 GNUNET_SCHEDULER_shutdown ();
6778 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
6781 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6783 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6785 GNUNET_SCHEDULER_shutdown ();
6790 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
6793 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6795 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6797 GNUNET_SCHEDULER_shutdown ();
6802 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
6805 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6807 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
6813 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
6814 &dht_replication_level))
6816 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6818 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
6819 "dht replication level", 10);
6820 dht_replication_level = 10;
6824 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
6825 GNUNET_free (keyfile);
6826 if (my_private_key == NULL)
6828 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6829 _("Mesh service could not access hostkey. Exiting.\n"));
6830 GNUNET_SCHEDULER_shutdown ();
6833 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
6834 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
6835 &my_full_id.hashPubKey);
6836 myid = GNUNET_PEER_intern (&my_full_id);
6838 // transport_handle = GNUNET_TRANSPORT_connect(c,
6845 dht_handle = GNUNET_DHT_connect (c, 64);
6846 if (dht_handle == NULL)
6851 stats = GNUNET_STATISTICS_create ("mesh", c);
6855 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
6857 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6858 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6859 peers = GNUNET_CONTAINER_multihashmap_create (32);
6860 applications = GNUNET_CONTAINER_multihashmap_create (32);
6861 types = GNUNET_CONTAINER_multihashmap_create (32);
6863 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
6864 nc = GNUNET_SERVER_notification_context_create (server_handle,
6866 GNUNET_SERVER_disconnect_notify (server_handle,
6867 &handle_local_client_disconnect, NULL);
6871 clients_tail = NULL;
6874 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
6875 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
6877 /* Create a peer_info for the local peer */
6878 peer = peer_info_get (&my_full_id);
6881 GNUNET_PEER_change_rc (myid, 1);
6882 peer_info_add_path (peer, p, GNUNET_YES);
6884 /* Scheduled the task to clean up when shutdown is called */
6885 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
6888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "end of run()\n");
6892 * The main function for the mesh service.
6894 * @param argc number of arguments from the command line
6895 * @param argv command line arguments
6896 * @return 0 ok, 1 on error
6899 main (int argc, char *const *argv)
6903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
6906 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
6908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");