2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
41 * - speed requirement specification (change?) in mesh API -- API call
43 * - relay corking down to core
44 * - set ttl relative to tree depth
50 #include "mesh_protocol.h"
51 #include "mesh_tunnel_tree.h"
52 #include "block_mesh.h"
53 #include "mesh_block_lib.h"
54 #include "gnunet_dht_service.h"
55 #include "gnunet_statistics_service.h"
56 #include "gnunet_regex_lib.h"
58 #define MESH_BLOOM_SIZE 128
60 #define MESH_DEBUG_DHT GNUNET_YES
61 #define MESH_DEBUG_CONNECTION GNUNET_NO
63 #if MESH_DEBUG_CONNECTION
64 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
66 #define DEBUG_CONN(...)
70 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
72 #define DEBUG_DHT(...)
75 /******************************************************************************/
76 /************************ DATA STRUCTURES ****************************/
77 /******************************************************************************/
79 /** FWD declaration */
84 * Struct representing a piece of data being sent to other peers
88 /** Tunnel it belongs to. */
91 /** In case of a multicast, task to allow a client to send more data if
92 * some neighbor is too slow. */
93 GNUNET_SCHEDULER_TaskIdentifier *task;
95 /** How many remaining neighbors we need to send this to. */
96 unsigned int *reference_counter;
98 /** Size of the data. */
107 * Struct containing info about a queued transmission to this peer
114 struct MeshPeerQueue *next;
119 struct MeshPeerQueue *prev;
122 * Peer this transmission is directed to.
124 struct MeshPeerInfo *peer;
127 * Tunnel this message belongs to.
129 struct MeshTunnel *tunnel;
132 * Pointer to info stucture used as cls.
142 * Size of the message
149 * Struct containing all info possibly needed to build a package when called
152 struct MeshTransmissionDescriptor
154 /** ID of the tunnel this packet travels in */
155 struct MESH_TunnelID *origin;
157 /** Who was this message being sent to */
158 struct MeshPeerInfo *peer;
160 /** Ultimate destination of the packet */
161 GNUNET_PEER_Id destination;
163 /** Data descriptor */
164 struct MeshData* mesh_data;
169 * Struct containing all information regarding a given peer
179 * Last time we heard from this peer
181 struct GNUNET_TIME_Absolute last_contact;
184 * Number of attempts to reconnect so far
186 int n_reconnect_attempts;
189 * Paths to reach the peer, ordered by ascending hop count
191 struct MeshPeerPath *path_head;
194 * Paths to reach the peer, ordered by ascending hop count
196 struct MeshPeerPath *path_tail;
199 * Handle to stop the DHT search for a path to this peer
201 struct GNUNET_DHT_GetHandle *dhtget;
204 * Closure given to the DHT GET
206 struct MeshPathInfo *dhtgetcls;
209 * Array of tunnels this peer participates in
210 * (most probably a small amount, therefore not a hashmap)
211 * When the path to the peer changes, notify these tunnels to let them
212 * re-adjust their path trees.
214 struct MeshTunnel **tunnels;
217 * Number of tunnels this peers participates in
219 unsigned int ntunnels;
222 * Transmission queue to core DLL head
224 struct MeshPeerQueue *queue_head;
227 * Transmission queue to core DLL tail
229 struct MeshPeerQueue *queue_tail;
232 * How many messages are in the queue to this peer.
234 unsigned int queue_n;
237 * Handle to for queued transmissions
239 struct GNUNET_CORE_TransmitHandle *core_transmit;
244 * Globally unique tunnel identification (owner + number)
245 * DO NOT USE OVER THE NETWORK
250 * Node that owns the tunnel
255 * Tunnel number to differentiate all the tunnels owned by the node oid
256 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
258 MESH_TunnelNumber tid;
262 struct MeshClient; /* FWD declaration */
265 * Struct containing all information regarding a tunnel
266 * For an intermediate node the improtant info used will be:
267 * - id Tunnel unique identification
268 * - paths[0] To know where to send it next
269 * - metainfo: ready, speeds, accounting
276 struct MESH_TunnelID id;
279 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
281 MESH_TunnelNumber local_tid;
284 * Local tunnel number for local destination clients (incoming number)
285 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
288 MESH_TunnelNumber local_tid_dest;
291 * Local count ID of the last packet seen/sent.
296 * SKIP value for this tunnel.
301 * MeshTunnelChildInfo of all children, indexed by GNUNET_PEER_Id.
303 struct GNUNET_CONTAINER_MultiHashMap *children_fc;
313 uint32_t max_child_ack;
316 * How many messages are in the queue.
318 unsigned int queue_n;
321 * How many messages do we accept in the queue.
323 unsigned int queue_max;
326 * Is the speed on the tunnel limited to the slowest peer?
331 * Is the tunnel bufferless (minimum latency)?
336 * Flag to signal the destruction of the tunnel.
337 * If this is set GNUNET_YES the tunnel will be destroyed
338 * when the queue is empty.
343 * Last time the tunnel was used
345 struct GNUNET_TIME_Absolute timestamp;
348 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
349 * containing peers added by id or by type, not intermediate peers.
351 struct GNUNET_CONTAINER_MultiHashMap *peers;
354 * Number of peers that are connected and potentially ready to receive data
356 unsigned int peers_ready;
359 * Number of peers that have been added to the tunnel
361 unsigned int peers_total;
364 * Client owner of the tunnel, if any
366 struct MeshClient *owner;
369 * Clients that have been informed about the tunnel, if any
371 struct MeshClient **clients;
374 * Number of elements in clients
376 unsigned int nclients;
379 * Clients that have requested to leave the tunnel
381 struct MeshClient **ignore;
384 * Number of elements in clients
386 unsigned int nignore;
391 GNUNET_PEER_Id *blacklisted;
394 * Number of elements in blacklisted
396 unsigned int nblacklisted;
399 * Bloomfilter (for peer identities) to stop circular routes
401 char bloomfilter[MESH_BLOOM_SIZE];
406 struct MeshTunnelTree *tree;
409 * Application type we are looking for in this tunnel
411 GNUNET_MESH_ApplicationType type;
414 * Used to search peers offering a service
416 struct GNUNET_DHT_GetHandle *dht_get_type;
419 * Initial context of the regex search for a connect_by_string
421 struct MeshRegexSearchContext *regex_ctx;
424 * Task to keep the used paths alive
426 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
429 * Task to destroy the tunnel after timeout
431 * FIXME: merge the two? a tunnel will have either
432 * a path refresh OR a timeout, never both!
434 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
439 * Info about a child node in a tunnel, needed to perform flow control.
441 struct MeshTunnelChildInfo
444 * ID of the child node.
459 * Maximum PID allowed.
465 * Info needed to work with tunnel paths and peers
472 struct MeshTunnel *t;
475 * Neighbouring peer to whom we send the packet to
477 struct MeshPeerInfo *peer;
482 struct MeshPeerPath *path;
487 * Struct containing information about a client of the service
494 struct MeshClient *next;
499 struct MeshClient *prev;
502 * Tunnels that belong to this client, indexed by local id
504 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
507 * Tunnels this client has accepted, indexed by incoming local id
509 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
512 * Tunnels this client has rejected, indexed by incoming local id
514 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
516 * Handle to communicate with the client
518 struct GNUNET_SERVER_Client *handle;
521 * Applications that this client has claimed to provide
523 struct GNUNET_CONTAINER_MultiHashMap *apps;
526 * Messages that this client has declared interest in
528 struct GNUNET_CONTAINER_MultiHashMap *types;
531 * Whether the client is active or shutting down (don't send confirmations
532 * to a client that is shutting down.
537 * ID of the client, mainly for debug messages
542 * Regular expressions describing the services offered by this client.
544 char **regexes; // FIXME add timeout? API to remove a regex?
547 * Number of regular expressions in regexes.
549 unsigned int n_regex;
552 * Task to refresh all regular expresions in the DHT.
554 GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
560 * Struct to keep information of searches of services described by a regex
561 * using a user-provided string service description.
563 struct MeshRegexSearchInfo
566 * Which tunnel is this for
568 struct MeshTunnel *t;
571 * User provided description of the searched service.
576 * Part of the description already consumed by the search.
583 struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
586 * Results from running DHT GETs.
588 struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
591 * Contexts, for each running DHT GET. Free all on end of search.
593 struct MeshRegexSearchContext **contexts;
596 * Number of contexts (branches/steps in search).
598 unsigned int n_contexts;
601 * Peer that is connecting via connect_by_string. When connected, free ctx.
606 * Other peers that are found but not yet being connected to.
608 GNUNET_PEER_Id *peers;
611 * Number of elements in peers.
613 unsigned int n_peers;
616 * Next peer to try to connect to.
621 * Timeout for a connect attempt.
622 * When reached, try to connect to a different peer, if any. If not,
623 * try the same peer again.
625 GNUNET_SCHEDULER_TaskIdentifier timeout;
630 * Struct to keep state of running searches that have consumed a part of
633 struct MeshRegexSearchContext
636 * Part of the description already consumed by
637 * this particular search branch.
642 * Information about the search.
644 struct MeshRegexSearchInfo *info;
648 /******************************************************************************/
649 /************************ DEBUG FUNCTIONS ****************************/
650 /******************************************************************************/
654 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
655 * @param cls string to print
656 * @param success GNUNET_OK if the PUT was transmitted,
657 * GNUNET_NO on timeout,
658 * GNUNET_SYSERR on disconnect from service
659 * after the PUT message was transmitted
660 * (so we don't know if it was received or not)
665 mesh_debug (void *cls, int success)
669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
675 /******************************************************************************/
676 /*********************** GLOBAL VARIABLES ****************************/
677 /******************************************************************************/
681 * Configuration parameters
683 static struct GNUNET_TIME_Relative refresh_path_time;
684 static struct GNUNET_TIME_Relative app_announce_time;
685 static struct GNUNET_TIME_Relative id_announce_time;
686 static struct GNUNET_TIME_Relative unacknowledged_wait_time;
687 static struct GNUNET_TIME_Relative connect_timeout;
688 static long long unsigned int default_ttl;
689 static long long unsigned int dht_replication_level;
690 static long long unsigned int max_tunnels;
691 static long long unsigned int max_msgs_queue;
694 * DLL with all the clients, head.
696 static struct MeshClient *clients;
699 * DLL with all the clients, tail.
701 static struct MeshClient *clients_tail;
704 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
706 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
709 * Number of tunnels known.
711 static unsigned long long n_tunnels;
714 * Tunnels incoming, indexed by MESH_TunnelNumber
715 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
717 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
720 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
722 static struct GNUNET_CONTAINER_MultiHashMap *peers;
725 * Handle to communicate with transport
727 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
730 * Handle to communicate with core.
732 static struct GNUNET_CORE_Handle *core_handle;
737 static struct GNUNET_DHT_Handle *dht_handle;
742 static struct GNUNET_SERVER_Handle *server_handle;
745 * Handle to the statistics service.
747 static struct GNUNET_STATISTICS_Handle *stats;
750 * Notification context, to send messages to local clients.
752 static struct GNUNET_SERVER_NotificationContext *nc;
755 * Local peer own ID (memory efficient handle).
757 static GNUNET_PEER_Id myid;
760 * Local peer own ID (full value).
762 static struct GNUNET_PeerIdentity my_full_id;
767 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
772 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
775 * Tunnel ID for the next created tunnel (global tunnel number).
777 static MESH_TunnelNumber next_tid;
780 * Tunnel ID for the next incoming tunnel (local tunnel number).
782 static MESH_TunnelNumber next_local_tid;
785 * All application types provided by this peer.
787 static struct GNUNET_CONTAINER_MultiHashMap *applications;
790 * All message types clients of this peer are interested in.
792 static struct GNUNET_CONTAINER_MultiHashMap *types;
795 * Task to periodically announce provided applications.
797 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
800 * Task to periodically announce itself in the network.
802 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
805 * Next ID to assign to a client.
807 unsigned int next_client_id;
810 /******************************************************************************/
811 /*********************** DECLARATIONS **************************/
812 /******************************************************************************/
814 /* FIXME move declarations here */
817 * Function to process paths received for a new peer addition. The recorded
818 * paths form the initial tunnel, which can be optimized later.
819 * Called on each result obtained for the DHT search.
822 * @param exp when will this value expire
823 * @param key key of the result
824 * @param type type of the result
825 * @param size number of bytes in data
826 * @param data pointer to the result data
829 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
830 const struct GNUNET_HashCode * key,
831 const struct GNUNET_PeerIdentity *get_path,
832 unsigned int get_path_length,
833 const struct GNUNET_PeerIdentity *put_path,
834 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
835 size_t size, const void *data);
839 * Function to process DHT string to regex matching.
840 * Called on each result obtained for the DHT search.
842 * @param cls closure (search context)
843 * @param exp when will this value expire
844 * @param key key of the result
845 * @param get_path path of the get request (not used)
846 * @param get_path_length lenght of get_path (not used)
847 * @param put_path path of the put request (not used)
848 * @param put_path_length length of the put_path (not used)
849 * @param type type of the result
850 * @param size number of bytes in data
851 * @param data pointer to the result data
853 * TODO: re-issue the request after certain time? cancel after X results?
856 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
857 const struct GNUNET_HashCode * key,
858 const struct GNUNET_PeerIdentity *get_path,
859 unsigned int get_path_length,
860 const struct GNUNET_PeerIdentity *put_path,
861 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
862 size_t size, const void *data);
866 * Function to process DHT string to regex matching.
867 * Called on each result obtained for the DHT search.
869 * @param cls closure (search context)
870 * @param exp when will this value expire
871 * @param key key of the result
872 * @param get_path path of the get request (not used)
873 * @param get_path_length lenght of get_path (not used)
874 * @param put_path path of the put request (not used)
875 * @param put_path_length length of the put_path (not used)
876 * @param type type of the result
877 * @param size number of bytes in data
878 * @param data pointer to the result data
881 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
882 const struct GNUNET_HashCode * key,
883 const struct GNUNET_PeerIdentity *get_path,
884 unsigned int get_path_length,
885 const struct GNUNET_PeerIdentity *put_path,
886 unsigned int put_path_length,
887 enum GNUNET_BLOCK_Type type,
888 size_t size, const void *data);
892 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
893 * and insert it in the appropiate structures if the peer is not known yet.
895 * @param peer Short identity of the peer.
897 * @return Existing or newly created peer info.
899 static struct MeshPeerInfo *
900 peer_info_get_short (const GNUNET_PEER_Id peer);
904 * Try to establish a new connection to this peer.
905 * Use the best path for the given tunnel.
906 * If the peer doesn't have any path to it yet, try to get one.
907 * If the peer already has some path, send a CREATE PATH towards it.
909 * @param peer PeerInfo of the peer.
910 * @param t Tunnel for which to create the path, if possible.
913 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
917 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
919 * If peer already exists, reevaluate shortest path and change if different.
921 * @param t Tunnel we want to add a new peer to
922 * @param peer PeerInfo of the peer being added
926 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
930 * Removes an explicit path from a tunnel, freeing all intermediate nodes
931 * that are no longer needed, as well as nodes of no longer reachable peers.
932 * The tunnel itself is also destoyed if results in a remote empty tunnel.
934 * @param t Tunnel from which to remove the path.
935 * @param peer Short id of the peer which should be removed.
938 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
942 * Search for a tunnel by global ID using full PeerIdentities.
944 * @param oid owner of the tunnel.
945 * @param tid global tunnel number.
947 * @return tunnel handler, NULL if doesn't exist.
949 static struct MeshTunnel *
950 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
954 * Delete an active client from the tunnel.
960 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
963 * Notify a tunnel that a connection has broken that affects at least
966 * @param t Tunnel affected.
967 * @param p1 Peer that got disconnected from p2.
968 * @param p2 Peer that got disconnected from p1.
970 * @return Short ID of the peer disconnected (either p1 or p2).
971 * 0 if the tunnel remained unaffected.
973 static GNUNET_PEER_Id
974 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
979 * Get the current ack value for a tunnel, taking in account the tunnel
980 * mode and the status of all children nodes.
984 * @return Maximum PID allowed.
987 tunnel_get_ack (struct MeshTunnel *t);
991 * Iterator over edges in a regex block retrieved from the DHT.
993 * @param cls Closure.
994 * @param token Token that follows to next state.
995 * @param len Lenght of token.
996 * @param key Hash of next state.
998 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1001 regex_edge_iterator (void *cls,
1004 const struct GNUNET_HashCode *key);
1008 * Find a path to a peer that offers a regex servcie compatible
1009 * with a given string.
1011 * @param key The key of the accepting state.
1012 * @param ctx Context containing info about the string, tunnel, etc.
1015 regex_find_path (const struct GNUNET_HashCode *key,
1016 struct MeshRegexSearchContext *ctx);
1020 * Queue and pass message to core when possible.
1022 * @param cls Closure (type dependant).
1023 * @param type Type of the message, 0 for a raw message.
1024 * @param size Size of the message.
1025 * @param dst Neighbor to send message to.
1026 * @param t Tunnel this message belongs to.
1029 queue_add (void *cls, uint16_t type, size_t size,
1030 struct MeshPeerInfo *dst, struct MeshTunnel *t);
1033 * Free a transmission that was already queued with all resources
1034 * associated to the request.
1036 * @param queue Queue handler to cancel.
1037 * @param clear_cls Is it necessary to free associated cls?
1040 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1042 /******************************************************************************/
1043 /************************ ITERATORS ****************************/
1044 /******************************************************************************/
1047 * Iterator over found existing mesh regex blocks that match an ongoing search.
1049 * @param cls closure
1050 * @param key current key code
1051 * @param value value in the hash map
1052 * @return GNUNET_YES if we should continue to iterate,
1056 regex_result_iterator (void *cls,
1057 const struct GNUNET_HashCode * key,
1060 struct MeshRegexBlock *block = value;
1061 struct MeshRegexSearchContext *ctx = cls;
1063 if (GNUNET_YES == ntohl(block->accepting) &&
1064 ctx->position == strlen (ctx->info->description))
1066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
1067 regex_find_path (key, ctx);
1068 return GNUNET_YES; // We found an accept state!
1072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
1073 ctx->position, strlen(ctx->info->description),
1074 ntohl(block->accepting));
1077 (void) GNUNET_MESH_regex_block_iterate (block, SIZE_MAX,
1078 ®ex_edge_iterator, ctx);
1085 * Iterator over edges in a regex block retrieved from the DHT.
1087 * @param cls Closure (context of the search).
1088 * @param token Token that follows to next state.
1089 * @param len Lenght of token.
1090 * @param key Hash of next state.
1092 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1095 regex_edge_iterator (void *cls,
1098 const struct GNUNET_HashCode *key)
1100 struct MeshRegexSearchContext *ctx = cls;
1101 struct MeshRegexSearchContext *new_ctx;
1102 struct MeshRegexSearchInfo *info = ctx->info;
1103 struct GNUNET_DHT_GetHandle *get_h;
1107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
1108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
1109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
1110 current = &info->description[ctx->position];
1111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
1112 current_len = strlen (info->description) - ctx->position;
1113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
1114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
1115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tk[0] : %c\n", token[0]);
1116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
1117 if (len > current_len)
1119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
1120 return GNUNET_YES; // Token too long, wont match
1122 if (0 != strncmp (current, token, len))
1124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
1125 return GNUNET_YES; // Token doesn't match
1127 new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
1128 new_ctx->info = info;
1129 new_ctx->position = ctx->position + len;
1130 GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
1132 GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, key))
1134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
1135 GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results, key,
1136 ®ex_result_iterator,
1138 return GNUNET_YES; // We are already looking for it
1140 /* Start search in DHT */
1142 GNUNET_DHT_get_start (dht_handle, /* handle */
1143 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
1144 key, /* key to search */
1145 dht_replication_level, /* replication level */
1146 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1147 NULL, /* xquery */ // FIXME BLOOMFILTER
1148 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1149 &dht_get_string_handler, new_ctx);
1151 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles, key, get_h,
1152 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
1162 * Iterator over hash map entries to cancel DHT GET requests after a
1163 * successful connect_by_string.
1165 * @param cls Closure (unused).
1166 * @param key Current key code (unused).
1167 * @param value Value in the hash map (get handle).
1168 * @return GNUNET_YES if we should continue to iterate,
1172 regex_cancel_dht_get (void *cls,
1173 const struct GNUNET_HashCode * key,
1176 struct GNUNET_DHT_GetHandle *h = value;
1178 GNUNET_DHT_get_stop (h);
1184 * Iterator over hash map entries to free MeshRegexBlocks stored during the
1185 * search for connect_by_string.
1187 * @param cls Closure (unused).
1188 * @param key Current key code (unused).
1189 * @param value MeshRegexBlock in the hash map.
1190 * @return GNUNET_YES if we should continue to iterate,
1194 regex_free_result (void *cls,
1195 const struct GNUNET_HashCode * key,
1199 GNUNET_free (value);
1205 * Regex callback iterator to store own service description in the DHT.
1207 * @param cls closure.
1208 * @param key hash for current state.
1209 * @param proof proof for current state.
1210 * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
1211 * @param num_edges number of edges leaving current state.
1212 * @param edges edges leaving current state.
1215 regex_iterator (void *cls, const struct GNUNET_HashCode *key, const char *proof,
1216 int accepting, unsigned int num_edges,
1217 const struct GNUNET_REGEX_Edge *edges)
1219 struct MeshRegexBlock *block;
1220 struct MeshRegexEdge *block_edge;
1221 enum GNUNET_DHT_RouteOption opt;
1225 unsigned int offset;
1228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1229 " regex dht put for state %s\n",
1231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1238 opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
1239 if (GNUNET_YES == accepting)
1241 struct MeshRegexAccept block;
1243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1244 " state %s is accepting, putting own id\n",
1246 size = sizeof (block);
1248 block.id = my_full_id;
1250 GNUNET_DHT_put(dht_handle, key,
1251 dht_replication_level,
1252 opt | GNUNET_DHT_RO_RECORD_ROUTE,
1253 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
1256 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1261 len = strlen(proof);
1262 size = sizeof (struct MeshRegexBlock) + len;
1263 block = GNUNET_malloc (size);
1266 block->n_proof = htonl (len);
1267 block->n_edges = htonl (num_edges);
1268 block->accepting = htonl (accepting);
1270 /* Store the proof at the end of the block. */
1271 aux = (char *) &block[1];
1272 memcpy (aux, proof, len);
1275 /* Store each edge in a variable length MeshEdge struct at the
1276 * very end of the MeshRegexBlock structure.
1278 for (i = 0; i < num_edges; i++)
1280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1281 " edge %s towards %s\n",
1283 GNUNET_h2s(&edges[i].destination));
1285 /* aux points at the end of the last block */
1286 len = strlen (edges[i].label);
1287 size += sizeof (struct MeshRegexEdge) + len;
1288 // Calculate offset FIXME is this ok? use size instead?
1289 offset = aux - (char *) block;
1290 block = GNUNET_realloc (block, size);
1291 aux = &((char *) block)[offset];
1292 block_edge = (struct MeshRegexEdge *) aux;
1293 block_edge->key = edges[i].destination;
1294 block_edge->n_token = htonl (len);
1295 aux = (char *) &block_edge[1];
1296 memcpy (aux, edges[i].label, len);
1300 GNUNET_DHT_put(dht_handle, key,
1301 dht_replication_level,
1303 GNUNET_BLOCK_TYPE_MESH_REGEX, size,
1305 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1309 GNUNET_free (block);
1314 * Store the regular expression describing a local service into the DHT.
1316 * @param regex The regular expresion.
1319 regex_put (const char *regex)
1321 struct GNUNET_REGEX_Automaton *dfa;
1323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) start\n", regex);
1324 dfa = GNUNET_REGEX_construct_dfa (regex, strlen(regex));
1325 GNUNET_REGEX_iterate_all_edges (dfa, ®ex_iterator, NULL);
1326 GNUNET_REGEX_automaton_destroy (dfa);
1327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) end\n", regex);
1332 * Find a path to a peer that offers a regex servcie compatible
1333 * with a given string.
1335 * @param key The key of the accepting state.
1336 * @param ctx Context containing info about the string, tunnel, etc.
1339 regex_find_path (const struct GNUNET_HashCode *key,
1340 struct MeshRegexSearchContext *ctx)
1342 struct GNUNET_DHT_GetHandle *get_h;
1344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
1345 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
1346 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
1347 key, /* key to search */
1348 dht_replication_level, /* replication level */
1349 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE |
1350 GNUNET_DHT_RO_RECORD_ROUTE,
1351 NULL, /* xquery */ // FIXME BLOOMFILTER
1352 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1353 &dht_get_string_accept_handler, ctx);
1354 GNUNET_break (GNUNET_OK ==
1355 GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
1358 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1363 * Function called if the connect attempt to a peer found via
1364 * connect_by_string times out. Try to connect to another peer, if any.
1365 * Otherwise try to reconnect to the same peer.
1367 * @param cls Closure (info about regex search).
1368 * @param tc TaskContext.
1371 regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1373 struct MeshRegexSearchInfo *info = cls;
1374 struct MeshPeerInfo *peer_info;
1378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
1379 info->timeout = GNUNET_SCHEDULER_NO_TASK;
1380 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
1388 if (0 < info->n_peers)
1390 // Select next peer, put current in that spot.
1391 id = info->peers[info->i_peer];
1392 info->peers[info->i_peer] = info->peer;
1393 info->i_peer = (info->i_peer + 1) % info->n_peers;
1397 // Try to connect to same peer again.
1400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
1402 peer_info = peer_info_get_short(id);
1403 tunnel_add_peer (info->t, peer_info);
1405 tunnel_delete_peer (info->t, old);
1406 peer_info_connect (peer_info, info->t);
1407 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
1408 ®ex_connect_timeout,
1410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
1415 * Cancel an ongoing regex search in the DHT and free all resources.
1417 * @param ctx The search context.
1420 regex_cancel_search(struct MeshRegexSearchContext *ctx)
1422 struct MeshRegexSearchInfo *info = ctx->info;
1425 GNUNET_free (info->description);
1426 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
1427 ®ex_cancel_dht_get, NULL);
1428 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
1429 ®ex_free_result, NULL);
1430 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
1431 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
1432 info->t->regex_ctx = NULL;
1433 for (i = 0; i < info->n_contexts; i++)
1435 GNUNET_free (info->contexts[i]);
1437 if (0 < info->n_contexts)
1438 GNUNET_free (info->contexts);
1439 if (0 < info->n_peers)
1440 GNUNET_free (info->peers);
1441 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
1443 GNUNET_SCHEDULER_cancel(info->timeout);
1449 /******************************************************************************/
1450 /************************ PERIODIC FUNCTIONS ****************************/
1451 /******************************************************************************/
1454 * Announce iterator over for each application provided by the peer
1456 * @param cls closure
1457 * @param key current key code
1458 * @param value value in the hash map
1459 * @return GNUNET_YES if we should continue to
1464 announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
1466 struct PBlock block;
1467 struct MeshClient *c;
1469 block.id = my_full_id;
1470 c = GNUNET_CONTAINER_multihashmap_get (applications, key);
1471 block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
1472 if (0 == block.type)
1477 block.type = htonl (block.type);
1479 GNUNET_break (NULL !=
1480 GNUNET_DHT_put (dht_handle, key,
1481 dht_replication_level,
1482 GNUNET_DHT_RO_RECORD_ROUTE |
1483 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1484 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
1486 (const char *) &block,
1487 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1489 app_announce_time, NULL, NULL));
1495 * Periodically announce what applications are provided by local clients
1498 * @param cls closure
1499 * @param tc task context
1502 announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1504 struct MeshClient *c = cls;
1507 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1509 c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
1513 DEBUG_DHT ("Starting PUT for regex\n");
1515 for (i = 0; i < c->n_regex; i++)
1517 regex_put (c->regexes[i]);
1519 c->regex_announce_task =
1520 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_regex, cls);
1521 DEBUG_DHT ("Finished PUT for regex\n");
1528 * Periodically announce what applications are provided by local clients
1531 * @param cls closure
1532 * @param tc task context
1535 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1537 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1539 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
1543 DEBUG_DHT ("Starting PUT for apps\n");
1545 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
1547 announce_applications_task =
1548 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
1550 DEBUG_DHT ("Finished PUT for apps\n");
1557 * Periodically announce self id in the DHT
1559 * @param cls closure
1560 * @param tc task context
1563 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1565 struct PBlock block;
1567 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1569 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1573 * - Set data expiration in function of X
1574 * - Adapt X to churn
1576 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1578 block.id = my_full_id;
1579 block.type = htonl (0);
1580 GNUNET_DHT_put (dht_handle, /* DHT handle */
1581 &my_full_id.hashPubKey, /* Key to use */
1582 dht_replication_level, /* Replication level */
1583 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1584 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1585 sizeof (block), /* Size of the data */
1586 (const char *) &block, /* Data itself */
1587 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1588 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1589 NULL, /* Continuation */
1590 NULL); /* Continuation closure */
1592 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1596 /******************************************************************************/
1597 /****************** GENERAL HELPER FUNCTIONS ************************/
1598 /******************************************************************************/
1602 * Decrements the reference counter and frees all resources if needed
1604 * @param mesh_data Data Descriptor used in a multicast message.
1605 * Freed no longer needed (last message).
1608 data_descriptor_decrement_rc (struct MeshData *mesh_data)
1610 /* Make sure it's a multicast packet */
1611 GNUNET_assert (NULL != mesh_data->reference_counter);
1613 if (0 == --(*(mesh_data->reference_counter)))
1615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1616 if (NULL != mesh_data->task)
1618 if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
1620 GNUNET_SCHEDULER_cancel (*(mesh_data->task));
1621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client...\n");
1622 GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
1624 GNUNET_free (mesh_data->task);
1626 GNUNET_free (mesh_data->reference_counter);
1627 GNUNET_free (mesh_data->data);
1628 GNUNET_free (mesh_data);
1634 * Check if client has registered with the service and has not disconnected
1636 * @param client the client to check
1638 * @return non-NULL if client exists in the global DLL
1640 static struct MeshClient *
1641 client_get (struct GNUNET_SERVER_Client *client)
1643 struct MeshClient *c;
1648 if (c->handle == client)
1657 * Checks if a given client has subscribed to certain message type
1659 * @param message_type Type of message to check
1660 * @param c Client to check
1662 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1665 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1667 struct GNUNET_HashCode hc;
1669 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1670 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1675 * Allow a client to send more data after transmitting a multicast message
1676 * which some neighbor has not yet accepted altough a reasonable time has
1679 * @param cls Closure (DataDescriptor containing the task identifier)
1680 * @param tc Task Context
1682 * FIXME reference counter cshould be just int
1685 client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1687 struct MeshData *mdata = cls;
1689 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1691 GNUNET_assert (NULL != mdata->reference_counter);
1692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1693 "CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
1694 *(mdata->reference_counter));
1695 *(mdata->task) = GNUNET_SCHEDULER_NO_TASK;
1696 GNUNET_SERVER_receive_done (mdata->t->owner->handle, GNUNET_OK);
1701 * Check whether client wants traffic from a tunnel.
1703 * @param c Client to check.
1704 * @param t Tunnel to be found.
1706 * @return GNUNET_YES if client knows tunnel.
1708 * TODO look in client hashmap
1711 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1715 for (i = 0; i < t->nclients; i++)
1716 if (t->clients[i] == c)
1723 * Check whether client has been informed about a tunnel.
1725 * @param c Client to check.
1726 * @param t Tunnel to be found.
1728 * @return GNUNET_YES if client knows tunnel.
1730 * TODO look in client hashmap
1733 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1737 for (i = 0; i < t->nignore; i++)
1738 if (t->ignore[i] == c)
1740 return client_wants_tunnel(c, t);
1745 * Marks a client as uninterested in traffic from the tunnel, updating both
1746 * client and tunnel to reflect this.
1748 * @param c Client that doesn't want traffic anymore.
1749 * @param t Tunnel which should be ignored.
1751 * FIXME when to delete an incoming tunnel?
1754 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1756 struct GNUNET_HashCode hash;
1758 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1759 GNUNET_break (GNUNET_YES ==
1760 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1762 GNUNET_break (GNUNET_YES ==
1763 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
1764 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1765 tunnel_delete_active_client (t, c);
1766 GNUNET_array_append (t->ignore, t->nignore, c);
1771 * Deletes a tunnel from a client (either owner or destination). To be used on
1772 * tunnel destroy, otherwise, use client_ignore_tunnel.
1774 * @param c Client whose tunnel to delete.
1775 * @param t Tunnel which should be deleted.
1778 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1780 struct GNUNET_HashCode hash;
1784 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1785 GNUNET_assert (GNUNET_YES ==
1786 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
1792 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1794 GNUNET_assert (GNUNET_YES ==
1795 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1799 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
1808 * Send the message to all clients that have subscribed to its type
1810 * @param msg Pointer to the message itself
1811 * @param payload Pointer to the payload of the message.
1812 * @return number of clients this message was sent to
1815 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
1816 const struct GNUNET_MessageHeader *payload)
1818 struct GNUNET_PeerIdentity *oid;
1819 struct MeshClient *c;
1820 struct MeshTunnel *t;
1821 MESH_TunnelNumber *tid;
1824 char cbuf[htons (msg->size)];
1826 type = ntohs (payload->type);
1827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
1828 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %u\n", type);
1830 memcpy (cbuf, msg, sizeof (cbuf));
1831 switch (htons (msg->type))
1833 struct GNUNET_MESH_Unicast *uc;
1834 struct GNUNET_MESH_Multicast *mc;
1835 struct GNUNET_MESH_ToOrigin *to;
1837 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1838 uc = (struct GNUNET_MESH_Unicast *) cbuf;
1842 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
1843 mc = (struct GNUNET_MESH_Multicast *) cbuf;
1847 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1848 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
1856 t = tunnel_get (oid, ntohl (*tid));
1863 for (count = 0, c = clients; c != NULL; c = c->next)
1865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
1866 if (client_is_subscribed (type, c))
1868 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
1872 *tid = htonl (t->local_tid);
1876 if (GNUNET_NO == client_knows_tunnel (c, t))
1878 /* This client doesn't know the tunnel */
1879 struct GNUNET_MESH_TunnelNotification tmsg;
1880 struct GNUNET_HashCode hash;
1882 tmsg.header.size = htons (sizeof (tmsg));
1883 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1884 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
1885 tmsg.tunnel_id = htonl (t->local_tid_dest);
1886 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1887 &tmsg.header, GNUNET_NO);
1888 GNUNET_array_append (t->clients, t->nclients, c);
1889 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1891 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
1892 c->incoming_tunnels, &hash, t,
1893 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1895 *tid = htonl (t->local_tid_dest);
1898 /* Check if the client wants to get traffic from the tunnel */
1899 if (GNUNET_NO == client_wants_tunnel(c, t))
1902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
1903 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1904 (struct GNUNET_MessageHeader
1905 *) cbuf, GNUNET_YES);
1913 * Notify the client that owns the tunnel that a peer has connected to it
1914 * (the requested path to it has been confirmed).
1916 * @param t Tunnel whose owner to notify
1917 * @param id Short id of the peer that has connected
1920 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
1922 struct GNUNET_MESH_PeerControl pc;
1924 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
1925 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
1926 pc.tunnel_id = htonl (t->local_tid);
1927 GNUNET_PEER_resolve (id, &pc.peer);
1928 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
1934 * Notify a client about how many more payload packages will we accept
1935 * on a given tunnel.
1941 send_client_tunnel_ack (struct MeshClient *c, struct MeshTunnel *t)
1943 struct GNUNET_MESH_LocalAck msg;
1949 ack = tunnel_get_ack (t);
1951 if (t->last_ack == ack)
1955 msg.header.size = htons (sizeof (msg));
1956 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1957 msg.tunnel_id = htonl (t->local_tid);
1958 msg.max_pid = htonl (ack);
1960 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1961 &msg.header, GNUNET_NO);
1966 * Notify all clients (not depending on registration status) that the incoming
1967 * tunnel is no longer valid.
1969 * @param t Tunnel that was destroyed.
1972 send_clients_tunnel_destroy (struct MeshTunnel *t)
1974 struct GNUNET_MESH_TunnelMessage msg;
1976 msg.header.size = htons (sizeof (msg));
1977 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1978 msg.tunnel_id = htonl (t->local_tid_dest);
1979 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
1984 * Notify clients of tunnel disconnections, if needed.
1985 * In case the origin disconnects, the destination clients get a tunnel destroy
1986 * notification. If the last destination disconnects (only one remaining client
1987 * in tunnel), the origin gets a (local ID) peer disconnected.
1988 * Note that the function must be called BEFORE removing the client from
1991 * @param t Tunnel that was destroyed.
1992 * @param c Client that disconnected.
1995 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2001 struct GNUNET_MESH_TunnelMessage msg;
2003 msg.header.size = htons (sizeof (msg));
2004 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2005 msg.tunnel_id = htonl (t->local_tid_dest);
2006 for (i = 0; i < t->nclients; i++)
2007 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2008 &msg.header, GNUNET_NO);
2010 // FIXME when to disconnect an incoming tunnel?
2011 else if (1 == t->nclients && NULL != t->owner)
2013 struct GNUNET_MESH_PeerControl msg;
2015 msg.header.size = htons (sizeof (msg));
2016 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2017 msg.tunnel_id = htonl (t->local_tid);
2018 msg.peer = my_full_id;
2019 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2020 &msg.header, GNUNET_NO);
2026 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2027 * and insert it in the appropiate structures if the peer is not known yet.
2029 * @param peer Full identity of the peer.
2031 * @return Existing or newly created peer info.
2033 static struct MeshPeerInfo *
2034 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2036 struct MeshPeerInfo *peer_info;
2038 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2039 if (NULL == peer_info)
2042 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2043 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2044 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2045 peer_info->id = GNUNET_PEER_intern (peer);
2053 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2054 * and insert it in the appropiate structures if the peer is not known yet.
2056 * @param peer Short identity of the peer.
2058 * @return Existing or newly created peer info.
2060 static struct MeshPeerInfo *
2061 peer_info_get_short (const GNUNET_PEER_Id peer)
2063 struct GNUNET_PeerIdentity id;
2065 GNUNET_PEER_resolve (peer, &id);
2066 return peer_info_get (&id);
2071 * Iterator to remove the tunnel from the list of tunnels a peer participates
2074 * @param cls Closure (tunnel info)
2075 * @param key GNUNET_PeerIdentity of the peer (unused)
2076 * @param value PeerInfo of the peer
2078 * @return always GNUNET_YES, to keep iterating
2081 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2083 struct MeshTunnel *t = cls;
2084 struct MeshPeerInfo *peer = value;
2087 for (i = 0; i < peer->ntunnels; i++)
2090 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2093 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2094 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2103 * Core callback to write a pre-constructed data packet to core buffer
2105 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2106 * @param size Number of bytes available in buf.
2107 * @param buf Where the to write the message.
2109 * @return number of bytes written to buf
2112 send_core_data_raw (void *cls, size_t size, void *buf)
2114 struct MeshTransmissionDescriptor *info = cls;
2115 struct GNUNET_MessageHeader *msg;
2118 GNUNET_assert (NULL != info);
2119 GNUNET_assert (NULL != info->mesh_data);
2120 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2121 total_size = ntohs (msg->size);
2123 if (total_size > size)
2128 memcpy (buf, msg, total_size);
2129 data_descriptor_decrement_rc (info->mesh_data);
2136 * Sends an already built non-multicast message to a peer,
2137 * properly registrating all used resources.
2139 * @param message Message to send. Function makes a copy of it.
2140 * @param peer Short ID of the neighbor whom to send the message.
2141 * @param t Tunnel on which this message is transmitted.
2144 send_message (const struct GNUNET_MessageHeader *message,
2145 const struct GNUNET_PeerIdentity *peer,
2146 struct MeshTunnel *t)
2148 struct MeshTransmissionDescriptor *info;
2149 struct MeshPeerInfo *neighbor;
2150 struct MeshPeerPath *p;
2153 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2155 size = ntohs (message->size);
2156 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2157 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2158 info->mesh_data->data = GNUNET_malloc (size);
2159 memcpy (info->mesh_data->data, message, size);
2160 if (ntohs(message->type) == GNUNET_MESSAGE_TYPE_MESH_UNICAST)
2162 struct GNUNET_MESH_Unicast *m;
2164 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2165 m->ttl = htonl (ntohl (m->ttl) - 1);
2167 info->mesh_data->data_len = size;
2168 info->mesh_data->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2169 *info->mesh_data->reference_counter = 1;
2170 neighbor = peer_info_get (peer);
2171 for (p = neighbor->path_head; NULL != p; p = p->next)
2180 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2181 GNUNET_free (info->mesh_data->data);
2182 GNUNET_free (info->mesh_data);
2186 info->peer = neighbor;
2196 * Sends a CREATE PATH message for a path to a peer, properly registrating
2197 * all used resources.
2199 * @param peer PeerInfo of the final peer for whom this path is being created.
2200 * @param p Path itself.
2201 * @param t Tunnel for which the path is created.
2204 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2205 struct MeshTunnel *t)
2207 struct GNUNET_PeerIdentity id;
2208 struct MeshPathInfo *path_info;
2209 struct MeshPeerInfo *neighbor;
2215 p = tree_get_path_to_peer (t->tree, peer->id);
2222 for (i = 0; i < p->length; i++)
2224 if (p->peers[i] == myid)
2227 if (i >= p->length - 1)
2233 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2235 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2236 path_info->path = p;
2238 neighbor = peer_info_get (&id);
2239 path_info->peer = neighbor;
2240 queue_add (path_info,
2241 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2242 sizeof (struct GNUNET_MESH_ManipulatePath) +
2243 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2250 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2252 * @param t Tunnel whose path to destroy.
2253 * @param destination Short ID of the peer to whom the path to destroy.
2256 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2258 struct MeshPeerPath *p;
2261 p = tree_get_path_to_peer (t->tree, destination);
2267 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2268 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2270 struct GNUNET_MESH_ManipulatePath *msg;
2271 struct GNUNET_PeerIdentity *pi;
2275 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2276 msg->header.size = htons (size);
2277 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2278 msg->tid = htonl (t->id.tid);
2279 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2280 for (i = 0; i < p->length; i++)
2282 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2284 send_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2291 * Try to establish a new connection to this peer.
2292 * Use the best path for the given tunnel.
2293 * If the peer doesn't have any path to it yet, try to get one.
2294 * If the peer already has some path, send a CREATE PATH towards it.
2296 * @param peer PeerInfo of the peer.
2297 * @param t Tunnel for which to create the path, if possible.
2300 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2302 struct MeshPeerPath *p;
2303 struct MeshPathInfo *path_info;
2305 if (NULL != peer->path_head)
2307 p = tree_get_path_to_peer (t->tree, peer->id);
2314 // FIXME always send create path to self
2317 send_create_path (peer, p, t);
2321 struct GNUNET_HashCode hash;
2324 send_client_peer_connected (t, myid);
2325 t->local_tid_dest = next_local_tid++;
2326 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2329 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2330 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2337 else if (NULL == peer->dhtget)
2339 struct GNUNET_PeerIdentity id;
2341 GNUNET_PEER_resolve (peer->id, &id);
2342 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2343 path_info->peer = peer;
2345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2346 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2347 peer->dhtgetcls = path_info;
2348 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2349 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2350 &id.hashPubKey, /* key to search */
2351 dht_replication_level, /* replication level */
2352 GNUNET_DHT_RO_RECORD_ROUTE |
2353 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2354 NULL, /* xquery */ // FIXME BLOOMFILTER
2355 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2356 &dht_get_id_handler, path_info);
2358 /* Otherwise, there is no path but the DHT get is already started. */
2363 * Task to delay the connection of a peer
2365 * @param cls Closure (path info with tunnel and peer to connect).
2366 * Will be free'd on exection.
2367 * @param tc TaskContext
2370 peer_info_connect_task (void *cls,
2371 const struct GNUNET_SCHEDULER_TaskContext *tc)
2373 struct MeshPathInfo *path_info = cls;
2375 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2380 peer_info_connect (path_info->peer, path_info->t);
2386 * Destroy the peer_info and free any allocated resources linked to it
2388 * @param pi The peer_info to destroy.
2390 * @return GNUNET_OK on success
2393 peer_info_destroy (struct MeshPeerInfo *pi)
2395 struct GNUNET_PeerIdentity id;
2396 struct MeshPeerPath *p;
2397 struct MeshPeerPath *nextp;
2399 GNUNET_PEER_resolve (pi->id, &id);
2400 GNUNET_PEER_change_rc (pi->id, -1);
2403 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2406 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2407 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2409 if (NULL != pi->dhtget)
2411 GNUNET_DHT_get_stop (pi->dhtget);
2412 GNUNET_free (pi->dhtgetcls);
2418 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2428 * Remove all paths that rely on a direct connection between p1 and p2
2429 * from the peer itself and notify all tunnels about it.
2431 * @param peer PeerInfo of affected peer.
2432 * @param p1 GNUNET_PEER_Id of one peer.
2433 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2436 * TODO: optimize (see below)
2439 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2442 struct MeshPeerPath *p;
2443 struct MeshPeerPath *aux;
2444 struct MeshPeerInfo *peer_d;
2446 unsigned int destroyed;
2451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2453 p = peer->path_head;
2457 for (i = 0; i < (p->length - 1); i++)
2459 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2460 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2462 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2473 for (i = 0; i < peer->ntunnels; i++)
2475 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2479 * Problem: one or more peers have been deleted from the tunnel tree.
2480 * We don't know who they are to try to add them again.
2481 * We need to try to find a new path for each of the disconnected peers.
2482 * Some of them might already have a path to reach them that does not
2483 * involve p1 and p2. Adding all anew might render in a better tree than
2484 * the trivial immediate fix.
2486 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2487 * its children will be reachable trough him.
2489 peer_d = peer_info_get_short (d);
2492 for (p = peer_d->path_head; NULL != p; p = p->next)
2494 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2502 /* No callback, as peer will be already disconnected and a connection
2503 * scheduled by tunnel_notify_connection_broken.
2505 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2509 peer_info_connect (peer_d, peer->tunnels[i]);
2512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2517 * Add the path to the peer and update the path used to reach it in case this
2520 * @param peer_info Destination peer to add the path to.
2521 * @param path New path to add. Last peer must be the peer in arg 1.
2522 * Path will be either used of freed if already known.
2523 * @param trusted Do we trust that this path is real?
2526 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2529 struct MeshPeerPath *aux;
2533 if ((NULL == peer_info) || (NULL == path))
2536 path_destroy (path);
2539 if (path->peers[path->length - 1] != peer_info->id)
2542 path_destroy (path);
2545 if (path->length <= 2 && GNUNET_NO == trusted)
2547 /* Only allow CORE to tell us about direct paths */
2548 path_destroy (path);
2551 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2552 for (l = 1; l < path->length; l++)
2554 if (path->peers[l] == myid)
2556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2557 for (l2 = 0; l2 < path->length - l; l2++)
2559 path->peers[l2] = path->peers[l + l2];
2564 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2569 struct GNUNET_PeerIdentity id;
2571 GNUNET_PEER_resolve (peer_info->id, &id);
2572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2573 path->length, GNUNET_i2s (&id));
2576 l = path_get_length (path);
2583 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2584 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2586 l2 = path_get_length (aux);
2589 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2590 peer_info->path_tail, aux, path);
2595 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2597 path_destroy (path);
2602 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2609 * Add the path to the origin peer and update the path used to reach it in case
2610 * this is the shortest.
2611 * The path is given in peer_info -> destination, therefore we turn the path
2612 * upside down first.
2614 * @param peer_info Peer to add the path to, being the origin of the path.
2615 * @param path New path to add after being inversed.
2616 * @param trusted Do we trust that this path is real?
2619 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2620 struct MeshPeerPath *path, int trusted)
2623 peer_info_add_path (peer_info, path, trusted);
2628 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2629 * to obtain a local peer -> destination path and interning the peer ids.
2631 * @return Newly allocated and created path
2633 static struct MeshPeerPath *
2634 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2635 unsigned int get_path_length,
2636 const struct GNUNET_PeerIdentity *put_path,
2637 unsigned int put_path_length)
2639 struct MeshPeerPath *p;
2645 GNUNET_PEER_change_rc (myid, 1);
2646 i = get_path_length;
2647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2648 for (i--; i >= 0; i--)
2650 id = GNUNET_PEER_intern (&get_path[i]);
2651 if (p->length > 0 && id == p->peers[p->length - 1])
2653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2654 GNUNET_PEER_change_rc (id, -1);
2658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2659 GNUNET_i2s (&get_path[i]));
2661 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2662 p->peers[p->length - 1] = id;
2665 i = put_path_length;
2666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2667 for (i--; i >= 0; i--)
2669 id = GNUNET_PEER_intern (&put_path[i]);
2672 /* PUT path went through us, so discard the path up until now and start
2673 * from here to get a much shorter (and loop-free) path.
2678 if (p->length > 0 && id == p->peers[p->length - 1])
2680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2681 GNUNET_PEER_change_rc (id, -1);
2685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2686 GNUNET_i2s (&put_path[i]));
2688 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2689 p->peers[p->length - 1] = id;
2693 if (get_path_length > 0)
2694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2695 GNUNET_i2s (&get_path[0]));
2696 if (put_path_length > 0)
2697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2698 GNUNET_i2s (&put_path[0]));
2699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2701 for (i = 0; i < p->length; i++)
2703 struct GNUNET_PeerIdentity peer_id;
2705 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2706 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2707 GNUNET_i2s (&peer_id));
2715 * Adds a path to the peer_infos of all the peers in the path
2717 * @param p Path to process.
2718 * @param confirmed Whether we know if the path works or not.
2721 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2725 /* TODO: invert and add */
2726 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2727 for (i++; i < p->length; i++)
2729 struct MeshPeerInfo *aux;
2730 struct MeshPeerPath *copy;
2732 aux = peer_info_get_short (p->peers[i]);
2733 copy = path_duplicate (p);
2734 copy->length = i + 1;
2735 peer_info_add_path (aux, copy, GNUNET_NO);
2741 * Send keepalive packets for a peer
2743 * @param cls Closure (tunnel for which to send the keepalive).
2744 * @param tc Notification context.
2746 * TODO: implement explicit multicast keepalive?
2749 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2753 * Search for a tunnel among the incoming tunnels
2755 * @param tid the local id of the tunnel
2757 * @return tunnel handler, NULL if doesn't exist
2759 static struct MeshTunnel *
2760 tunnel_get_incoming (MESH_TunnelNumber tid)
2762 struct GNUNET_HashCode hash;
2764 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2765 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2766 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2771 * Search for a tunnel among the tunnels for a client
2773 * @param c the client whose tunnels to search in
2774 * @param tid the local id of the tunnel
2776 * @return tunnel handler, NULL if doesn't exist
2778 static struct MeshTunnel *
2779 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2781 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2783 return tunnel_get_incoming (tid);
2787 struct GNUNET_HashCode hash;
2789 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2790 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2796 * Search for a tunnel by global ID using PEER_ID
2798 * @param pi owner of the tunnel
2799 * @param tid global tunnel number
2801 * @return tunnel handler, NULL if doesn't exist
2803 static struct MeshTunnel *
2804 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2806 struct MESH_TunnelID id;
2807 struct GNUNET_HashCode hash;
2812 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2813 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2818 * Search for a tunnel by global ID using full PeerIdentities
2820 * @param oid owner of the tunnel
2821 * @param tid global tunnel number
2823 * @return tunnel handler, NULL if doesn't exist
2825 static struct MeshTunnel *
2826 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2828 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2833 * Delete an active client from the tunnel.
2839 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
2843 for (i = 0; i < t->nclients; i++)
2845 if (t->clients[i] == c)
2847 t->clients[i] = t->clients[t->nclients - 1];
2848 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
2856 * Delete an ignored client from the tunnel.
2862 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
2866 for (i = 0; i < t->nignore; i++)
2868 if (t->ignore[i] == c)
2870 t->ignore[i] = t->ignore[t->nignore - 1];
2871 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
2879 * Delete a client from the tunnel. It should be only done on
2880 * client disconnection, otherwise use client_ignore_tunnel.
2886 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
2888 tunnel_delete_ignored_client (t, c);
2889 tunnel_delete_active_client (t, c);
2894 * Iterator to free MeshTunnelChildInfo of tunnel children.
2896 * @param cls Closure (tunnel info).
2897 * @param key Hash of GNUNET_PEER_Id (unused).
2898 * @param value MeshTunnelChildInfo of the child.
2900 * @return always GNUNET_YES, to keep iterating
2903 tunnel_destroy_child (void *cls,
2904 const struct GNUNET_HashCode * key,
2907 GNUNET_free (value);
2913 * Callback used to notify a client owner of a tunnel that a peer has
2914 * disconnected, most likely because of a path change.
2916 * @param cls Closure (tunnel this notification is about).
2917 * @param peer_id Short ID of disconnected peer.
2920 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
2922 struct MeshTunnel *t = cls;
2923 struct MeshPeerInfo *peer;
2924 struct MeshPathInfo *path_info;
2926 if (NULL != t->owner && NULL != nc)
2928 struct GNUNET_MESH_PeerControl msg;
2930 msg.header.size = htons (sizeof (msg));
2931 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2932 msg.tunnel_id = htonl (t->local_tid);
2933 GNUNET_PEER_resolve (peer_id, &msg.peer);
2934 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2935 &msg.header, GNUNET_NO);
2937 peer = peer_info_get_short (peer_id);
2938 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2939 path_info->peer = peer;
2941 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
2946 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
2947 * needed rescources.
2948 * If peer already exists, reevaluate shortest path and change if different.
2950 * @param t Tunnel we want to add a new peer to
2951 * @param peer PeerInfo of the peer being added
2955 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
2957 struct GNUNET_PeerIdentity id;
2958 struct MeshPeerPath *best_p;
2959 struct MeshPeerPath *p;
2960 unsigned int best_cost;
2963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
2964 GNUNET_PEER_resolve (peer->id, &id);
2966 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
2969 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
2970 GNUNET_assert (GNUNET_OK ==
2971 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
2973 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2976 if (NULL != (p = peer->path_head))
2979 best_cost = tree_get_path_cost (t->tree, p);
2982 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
2989 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
2990 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
2991 t->path_refresh_task =
2992 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
2996 /* Start a DHT get */
2997 peer_info_connect (peer, t);
2999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3003 * Add a path to a tunnel which we don't own, just to remember the next hop.
3004 * If destination node was already in the tunnel, the first hop information
3005 * will be replaced with the new path.
3007 * @param t Tunnel we want to add a new peer to
3008 * @param p Path to add
3009 * @param own_pos Position of local node in path.
3013 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3014 unsigned int own_pos)
3016 struct GNUNET_PeerIdentity id;
3018 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3019 GNUNET_assert (0 != own_pos);
3020 tree_add_path (t->tree, p, NULL, NULL);
3021 if (own_pos < p->length - 1)
3023 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3024 tree_update_first_hops (t->tree, myid, &id);
3026 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3031 * Notifies a tunnel that a connection has broken that affects at least
3032 * some of its peers. Sends a notification towards the root of the tree.
3033 * In case the peer is the owner of the tree, notifies the client that owns
3034 * the tunnel and tries to reconnect.
3036 * @param t Tunnel affected.
3037 * @param p1 Peer that got disconnected from p2.
3038 * @param p2 Peer that got disconnected from p1.
3040 * @return Short ID of the peer disconnected (either p1 or p2).
3041 * 0 if the tunnel remained unaffected.
3043 static GNUNET_PEER_Id
3044 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3050 tree_notify_connection_broken (t->tree, p1, p2,
3051 &tunnel_notify_client_peer_disconnected,
3053 if (myid != p1 && myid != p2)
3059 if (tree_get_predecessor (t->tree) != 0)
3061 /* We are the peer still connected, notify owner of the disconnection. */
3062 struct GNUNET_MESH_PathBroken msg;
3063 struct GNUNET_PeerIdentity neighbor;
3065 msg.header.size = htons (sizeof (msg));
3066 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3067 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3068 msg.tid = htonl (t->id.tid);
3069 msg.peer1 = my_full_id;
3070 GNUNET_PEER_resolve (pid, &msg.peer2);
3071 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3072 send_message (&msg.header, &neighbor, t);
3080 * Send a multicast packet to a neighbor.
3082 * @param cls Closure (Info about the multicast packet)
3083 * @param neighbor_id Short ID of the neighbor to send the packet to.
3086 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3088 struct MeshData *mdata = cls;
3089 struct MeshTransmissionDescriptor *info;
3090 struct GNUNET_PeerIdentity neighbor;
3092 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3094 info->mesh_data = mdata;
3095 (*(mdata->reference_counter)) ++;
3096 info->destination = neighbor_id;
3097 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3099 GNUNET_i2s (&neighbor));
3100 info->peer = peer_info_get (&neighbor);
3101 GNUNET_assert (NULL != info->peer);
3103 GNUNET_MESSAGE_TYPE_MESH_MULTICAST,
3104 info->mesh_data->data_len,
3111 * Send a message in a tunnel in multicast, sending a copy to each child node
3112 * down the local one in the tunnel tree.
3114 * @param t Tunnel in which to send the data.
3115 * @param msg Message to be sent.
3116 * @param internal Has the service generated this message?
3119 tunnel_send_multicast (struct MeshTunnel *t,
3120 const struct GNUNET_MessageHeader *msg,
3123 struct MeshData *mdata;
3125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3126 " sending a multicast packet...\n");
3127 mdata = GNUNET_malloc (sizeof (struct MeshData));
3128 mdata->data_len = ntohs (msg->size);
3129 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
3131 mdata->data = GNUNET_malloc (mdata->data_len);
3132 memcpy (mdata->data, msg, mdata->data_len);
3133 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3135 struct GNUNET_MESH_Multicast *mcast;
3137 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3138 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3140 ntohl (mcast->ttl));
3144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3146 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
3147 && GNUNET_NO == internal)
3149 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
3151 GNUNET_SCHEDULER_add_delayed (unacknowledged_wait_time, &client_allow_send,
3153 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
3157 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3158 if (*(mdata->reference_counter) == 0)
3160 GNUNET_free (mdata->data);
3161 GNUNET_free (mdata->reference_counter);
3162 if (NULL != mdata->task)
3164 GNUNET_SCHEDULER_cancel(*(mdata->task));
3165 GNUNET_free (mdata->task);
3166 GNUNET_SERVER_receive_done(t->owner->handle, GNUNET_OK);
3168 // FIXME change order?
3169 GNUNET_free (mdata);
3171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3172 " sending a multicast packet done\n");
3178 * Increase the SKIP value of all peers that
3179 * have not received a unicast message.
3181 * @param cls Closure (ID of the peer that HAS received the message).
3182 * @param key ID of the neighbor.
3183 * @param value Information about the neighbor.
3185 * @return GNUNET_YES to keep iterating.
3188 tunnel_add_skip (void *cls,
3189 const struct GNUNET_HashCode * key,
3192 struct GNUNET_PeerIdentity *neighbor = cls;
3193 struct MeshTunnelChildInfo *cinfo = value;
3195 /* TODO compare only pointers? key == neighbor? */
3196 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3207 * Iterator to get the appropiate ACK value from all children nodes.
3209 * @param cls Closue (tunnel).
3210 * @param id Id of the child node.
3213 tunnel_get_child_ack (void *cls,
3216 struct GNUNET_PeerIdentity peer_id;
3217 struct MeshTunnelChildInfo *cinfo;
3218 struct MeshTunnel *t = cls;
3221 GNUNET_PEER_resolve (id, &peer_id);
3222 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3223 &peer_id.hashPubKey);
3226 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3228 cinfo->pid = t->pid;
3229 cinfo->skip = t->pid;
3230 cinfo->max_pid = ack = t->pid + 1;
3231 GNUNET_assert (GNUNET_OK ==
3232 GNUNET_CONTAINER_multihashmap_put(t->children_fc,
3233 &peer_id.hashPubKey,
3235 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3239 ack = cinfo->max_pid;
3242 if (0 == t->max_child_ack)
3243 t->max_child_ack = ack;
3245 if (GNUNET_YES == t->speed_min)
3247 t->max_child_ack = t->max_child_ack > ack ? ack : t->max_child_ack;
3251 t->max_child_ack = t->max_child_ack > ack ? t->max_child_ack : ack;
3258 * Get the maximum PID allowed to transmit to any
3259 * tunnel child of the local peer.
3263 * @return Maximum PID allowed.
3266 tunnel_get_children_ack (struct MeshTunnel *t)
3268 t->max_child_ack = 0;
3269 tree_iterate_children (t->tree, tunnel_get_child_ack, t);
3270 return t->max_child_ack;
3275 * Get the current ack value for a tunnel, taking in account the tunnel
3276 * mode and the status of all children nodes.
3280 * @return Maximum PID allowed.
3283 tunnel_get_ack (struct MeshTunnel *t)
3286 uint32_t buffer_free;
3290 count = t->pid - t->skip;
3291 buffer_free = t->queue_max - t->queue_n;
3292 ack = count + buffer_free;
3293 child_ack = tunnel_get_children_ack (t);
3295 if (GNUNET_YES == t->speed_min)
3297 ack = child_ack > ack ? ack : child_ack;
3301 ack = child_ack > ack ? child_ack : ack;
3308 * Send an ACK informing the predecessor about the available buffer space.
3309 * If buffering is off, send only on behalf of children or self if endpoint.
3310 * If buffering is on, send when sent to children and buffer space is free.
3312 * @param t Tunnel on which to send the ACK.
3315 tunnel_send_ack (struct MeshTunnel *t, uint16_t type)
3317 struct GNUNET_MESH_ACK msg;
3318 struct GNUNET_PeerIdentity id;
3321 /* Is it after unicast / multicast retransmission? */
3322 if (GNUNET_MESSAGE_TYPE_MESH_ACK != type)
3324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "ACK via DATA retransmission\n");
3325 if (GNUNET_YES == t->nobuffer)
3327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3330 if (t->queue_max > t->queue_n * 2)
3332 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3337 /* Ok, ACK might be necessary, what PID to ACK? */
3338 ack = tunnel_get_ack (t);
3340 /* If speed_min and not all children have ack'd, dont send yet */
3341 if (ack == t->last_ack)
3343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, not ready\n");
3348 msg.pid = htonl (ack);
3350 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3352 msg.header.size = htons (sizeof (msg));
3353 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3354 msg.tid = htonl (t->id.tid);
3355 GNUNET_PEER_resolve(t->id.oid, &msg.oid);
3356 send_message (&msg.header, &id, t);
3361 * Send a message to all peers in this tunnel that the tunnel is no longer
3364 * @param t The tunnel whose peers to notify.
3367 tunnel_send_destroy (struct MeshTunnel *t)
3369 struct GNUNET_MESH_TunnelDestroy msg;
3371 msg.header.size = htons (sizeof (msg));
3372 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3373 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3374 msg.tid = htonl (t->id.tid);
3375 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
3380 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
3382 * @param cls Closure (Tunnel which to cancel).
3383 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
3386 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
3388 struct MeshTunnel *t = cls;
3389 struct MeshPeerInfo *peer_info;
3390 struct MeshPeerQueue *pq;
3391 struct MeshPeerQueue *next;
3393 peer_info = peer_info_get_short (neighbor_id);
3394 for (pq = peer_info->queue_head; NULL != pq; pq = next)
3397 if (pq->tunnel == t)
3399 queue_destroy (pq, GNUNET_YES);
3402 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
3404 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
3405 peer_info->core_transmit = NULL;
3410 * Destroy the tunnel and free any allocated resources linked to it.
3412 * @param t the tunnel to destroy
3414 * @return GNUNET_OK on success
3417 tunnel_destroy (struct MeshTunnel *t)
3419 struct MeshClient *c;
3420 struct GNUNET_HashCode hash;
3427 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
3433 struct GNUNET_PeerIdentity id;
3435 GNUNET_PEER_resolve (t->id.oid, &id);
3436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3437 GNUNET_i2s (&id), t->id.tid);
3439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3443 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3444 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3449 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3452 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
3456 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
3457 for (i = 0; i < t->nclients; i++)
3461 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
3466 for (i = 0; i < t->nignore; i++)
3470 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
3475 if (t->nclients > 0)
3478 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
3482 GNUNET_free (t->clients);
3484 if (NULL != t->peers)
3486 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
3488 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
3491 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
3492 &tunnel_destroy_child,
3494 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
3496 tree_destroy (t->tree);
3498 if (NULL != t->regex_ctx)
3499 regex_cancel_search (t->regex_ctx);
3500 if (NULL != t->dht_get_type)
3501 GNUNET_DHT_get_stop (t->dht_get_type);
3502 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
3503 GNUNET_SCHEDULER_cancel (t->timeout_task);
3504 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
3505 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
3508 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
3509 GNUNET_assert (0 <= n_tunnels);
3516 * Create a new tunnel
3518 * @param owner Who is the owner of the tunnel (short ID).
3519 * @param tid Tunnel Number of the tunnel.
3520 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
3521 * @param local Tunnel Number for the tunnel, for the client point of view.
3523 * @return A new initialized tunnel. NULL on error.
3525 static struct MeshTunnel *
3526 tunnel_new (GNUNET_PEER_Id owner,
3527 MESH_TunnelNumber tid,
3528 struct MeshClient *client,
3529 MESH_TunnelNumber local)
3531 struct MeshTunnel *t;
3532 struct GNUNET_HashCode hash;
3534 if (n_tunnels >= max_tunnels && NULL == client)
3537 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3540 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
3541 t->tree = tree_new (owner);
3543 t->local_tid = local;
3544 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8);
3546 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
3548 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3550 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3551 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3556 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3562 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3564 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
3565 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3569 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3579 * Removes an explicit path from a tunnel, freeing all intermediate nodes
3580 * that are no longer needed, as well as nodes of no longer reachable peers.
3581 * The tunnel itself is also destoyed if results in a remote empty tunnel.
3583 * @param t Tunnel from which to remove the path.
3584 * @param peer Short id of the peer which should be removed.
3587 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
3589 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
3595 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
3596 * client when the client disconnects. If the client is not the owner, the
3597 * owner will get notified if no more clients are in the tunnel and the client
3598 * get removed from the tunnel's list.
3600 * @param cls closure (client that is disconnecting)
3601 * @param key the hash of the local tunnel id (used to access the hashmap)
3602 * @param value the value stored at the key (tunnel to destroy)
3604 * @return GNUNET_OK on success
3607 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
3609 struct MeshTunnel *t = value;
3610 struct MeshClient *c = cls;
3613 send_client_tunnel_disconnect(t, c);
3616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3617 "Client %u is destination, keeping the tunnel alive.\n", c->id);
3618 tunnel_delete_client(t, c);
3619 client_delete_tunnel(c, t);
3622 tunnel_send_destroy(t);
3623 r = tunnel_destroy (t);
3629 * Timeout function, destroys tunnel if called
3631 * @param cls Closure (tunnel to destroy).
3632 * @param tc TaskContext
3635 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3637 struct MeshTunnel *t = cls;
3639 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3641 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3646 * Resets the tunnel timeout. Starts it if no timeout was running.
3648 * @param t Tunnel whose timeout to reset.
3651 tunnel_reset_timeout (struct MeshTunnel *t)
3653 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
3654 GNUNET_SCHEDULER_cancel (t->timeout_task);
3656 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3657 (refresh_path_time, 4), &tunnel_timeout, t);
3661 /******************************************************************************/
3662 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3663 /******************************************************************************/
3666 * Function to send a create path packet to a peer.
3668 * @param cls closure
3669 * @param size number of bytes available in buf
3670 * @param buf where the callee should write the message
3671 * @return number of bytes written to buf
3674 send_core_path_create (void *cls, size_t size, void *buf)
3676 struct MeshPathInfo *info = cls;
3677 struct GNUNET_MESH_ManipulatePath *msg;
3678 struct GNUNET_PeerIdentity *peer_ptr;
3679 struct MeshTunnel *t = info->t;
3680 struct MeshPeerPath *p = info->path;
3685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
3687 sizeof (struct GNUNET_MESH_ManipulatePath) +
3688 p->length * sizeof (struct GNUNET_PeerIdentity);
3690 if (size < size_needed || NULL == buf)
3695 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
3696 msg->header.size = htons (size_needed);
3697 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
3698 msg->tid = ntohl (t->id.tid);
3700 if (GNUNET_YES == t->speed_min)
3701 opt = MESH_TUNNEL_OPT_SPEED_MIN;
3702 if (GNUNET_YES == t->nobuffer)
3703 opt |= MESH_TUNNEL_OPT_NOBUFFER;
3704 msg->opt = htonl(opt);
3706 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
3707 for (i = 0; i < p->length; i++)
3709 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
3715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3716 "CREATE PATH (%u bytes long) sent!\n", size_needed);
3722 * Fill the core buffer
3724 * @param cls closure (data itself)
3725 * @param size number of bytes available in buf
3726 * @param buf where the callee should write the message
3728 * @return number of bytes written to buf
3731 send_core_data_multicast (void *cls, size_t size, void *buf)
3733 struct MeshTransmissionDescriptor *info = cls;
3736 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
3737 GNUNET_assert (NULL != info);
3738 GNUNET_assert (NULL != info->peer);
3739 total_size = info->mesh_data->data_len;
3740 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
3742 if (total_size > size)
3747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
3748 memcpy (buf, info->mesh_data->data, total_size);
3751 struct GNUNET_MESH_Multicast *mc;
3752 struct GNUNET_MessageHeader *mh;
3755 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3757 mc = (struct GNUNET_MESH_Multicast *) mh;
3758 mh = (struct GNUNET_MessageHeader *) &mc[1];
3759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3760 " multicast, payload type %u\n", ntohs (mh->type));
3761 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3762 " multicast, payload size %u\n", ntohs (mh->size));
3766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %u\n",
3771 data_descriptor_decrement_rc (info->mesh_data);
3772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
3774 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
3780 * Creates a path ack message in buf and frees all unused resources.
3782 * @param cls closure (MeshTransmissionDescriptor)
3783 * @param size number of bytes available in buf
3784 * @param buf where the callee should write the message
3785 * @return number of bytes written to buf
3788 send_core_path_ack (void *cls, size_t size, void *buf)
3790 struct MeshTransmissionDescriptor *info = cls;
3791 struct GNUNET_MESH_PathACK *msg = buf;
3793 GNUNET_assert (NULL != info);
3794 if (sizeof (struct GNUNET_MESH_PathACK) > size)
3799 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
3800 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3801 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
3802 msg->tid = htonl (info->origin->tid);
3803 msg->peer_id = my_full_id;
3806 /* TODO add signature */
3808 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
3809 return sizeof (struct GNUNET_MESH_PathACK);
3814 * Free a transmission that was already queued with all resources
3815 * associated to the request.
3817 * @param queue Queue handler to cancel.
3818 * @param clear_cls Is it necessary to free associated cls?
3821 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3823 struct MeshTransmissionDescriptor *dd;
3824 struct MeshPathInfo *path_info;
3826 if (GNUNET_YES == clear_cls)
3828 switch (queue->type)
3830 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3831 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3832 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3833 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
3835 data_descriptor_decrement_rc (dd->mesh_data);
3837 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3838 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3839 path_info = queue->cls;
3840 path_destroy (path_info->path);
3844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
3846 GNUNET_free_non_null (queue->cls);
3848 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3849 queue->peer->queue_tail,
3851 GNUNET_free (queue);
3856 * Core callback to write a queued packet to core buffer
3858 * @param cls Closure (peer info).
3859 * @param size Number of bytes available in buf.
3860 * @param buf Where the to write the message.
3862 * @return number of bytes written to buf
3865 queue_send (void *cls, size_t size, void *buf)
3867 struct MeshPeerInfo *peer = cls;
3868 struct GNUNET_MessageHeader *msg;
3869 struct MeshPeerQueue *queue;
3870 struct MeshTunnel *t;
3873 peer->core_transmit = NULL;
3874 queue = peer->queue_head;
3876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
3878 /* If queue is empty, send should have been cancelled */
3884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
3886 /* Check if buffer size is enough for the message */
3887 if (queue->size > size)
3889 struct GNUNET_PeerIdentity id;
3891 GNUNET_PEER_resolve (peer->id, &id);
3892 peer->core_transmit =
3893 GNUNET_CORE_notify_transmit_ready(core_handle,
3896 GNUNET_TIME_UNIT_FOREVER_REL,
3903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
3909 switch (queue->type)
3912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* raw\n");
3913 data_size = send_core_data_raw (queue->cls, size, buf);
3914 msg = (struct GNUNET_MessageHeader *) buf;
3915 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_UNICAST)
3916 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3918 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
3920 data_size = send_core_data_multicast(queue->cls, size, buf);
3921 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
3923 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3924 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
3925 data_size = send_core_path_create(queue->cls, size, buf);
3927 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
3929 data_size = send_core_path_ack(queue->cls, size, buf);
3933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* type unknown\n");
3937 /* Free queue, but cls was freed by send_core_* */
3938 queue_destroy (queue, GNUNET_NO);
3940 if (GNUNET_YES == t->destroy && 0 == t->queue_n)
3942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
3946 /* If more data in queue, send next */
3947 if (NULL != peer->queue_head)
3949 struct GNUNET_PeerIdentity id;
3951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
3952 GNUNET_PEER_resolve (peer->id, &id);
3953 peer->core_transmit =
3954 GNUNET_CORE_notify_transmit_ready(core_handle,
3957 GNUNET_TIME_UNIT_FOREVER_REL,
3959 peer->queue_head->size,
3963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
3969 * Queue and pass message to core when possible.
3971 * @param cls Closure (type dependant).
3972 * @param type Type of the message, 0 for a raw message.
3973 * @param size Size of the message.
3974 * @param dst Neighbor to send message to.
3975 * @param t Tunnel this message belongs to.
3978 queue_add (void *cls, uint16_t type, size_t size,
3979 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3981 struct MeshPeerQueue *queue;
3983 if (t->queue_n >= t->queue_max)
3985 if (NULL == t->owner)
3986 GNUNET_break_op(0); // TODO: kill connection?
3989 return; // Drop message
3992 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3998 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3999 if (NULL == dst->core_transmit)
4001 struct GNUNET_PeerIdentity id;
4003 GNUNET_PEER_resolve (dst->id, &id);
4004 dst->core_transmit =
4005 GNUNET_CORE_notify_transmit_ready(core_handle,
4008 GNUNET_TIME_UNIT_FOREVER_REL,
4017 /******************************************************************************/
4018 /******************** MESH NETWORK HANDLERS **************************/
4019 /******************************************************************************/
4023 * Core handler for path creation
4025 * @param cls closure
4026 * @param message message
4027 * @param peer peer identity this notification is about
4028 * @param atsi performance data
4029 * @param atsi_count number of records in 'atsi'
4031 * @return GNUNET_OK to keep the connection open,
4032 * GNUNET_SYSERR to close it (signal serious error)
4035 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
4036 const struct GNUNET_MessageHeader *message,
4037 const struct GNUNET_ATS_Information *atsi,
4038 unsigned int atsi_count)
4040 unsigned int own_pos;
4043 MESH_TunnelNumber tid;
4044 struct GNUNET_MESH_ManipulatePath *msg;
4045 struct GNUNET_PeerIdentity *pi;
4046 struct GNUNET_HashCode hash;
4047 struct MeshPeerPath *path;
4048 struct MeshPeerInfo *dest_peer_info;
4049 struct MeshPeerInfo *orig_peer_info;
4050 struct MeshTunnel *t;
4052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4053 "Received a path create msg [%s]\n",
4054 GNUNET_i2s (&my_full_id));
4055 size = ntohs (message->size);
4056 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4058 GNUNET_break_op (0);
4062 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4063 if (size % sizeof (struct GNUNET_PeerIdentity))
4065 GNUNET_break_op (0);
4068 size /= sizeof (struct GNUNET_PeerIdentity);
4071 GNUNET_break_op (0);
4074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4075 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4077 tid = ntohl (msg->tid);
4078 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4080 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
4081 t = tunnel_get (pi, tid);
4082 if (NULL == t) // FIXME only for INCOMING tunnels?
4086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
4087 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
4090 // FIXME notify failure
4093 opt = ntohl (msg->opt);
4094 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
4095 GNUNET_YES : GNUNET_NO;
4096 t->nobuffer = (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER)) ?
4097 GNUNET_YES : GNUNET_NO;
4099 if (GNUNET_YES == t->nobuffer)
4102 while (NULL != tunnel_get_incoming (next_local_tid))
4103 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4104 t->local_tid_dest = next_local_tid++;
4105 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4107 tunnel_reset_timeout (t);
4108 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4110 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
4111 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
4119 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
4120 if (NULL == dest_peer_info)
4122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4123 " Creating PeerInfo for destination.\n");
4124 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4125 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
4126 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
4128 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4130 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
4131 if (NULL == orig_peer_info)
4133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4134 " Creating PeerInfo for origin.\n");
4135 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4136 orig_peer_info->id = GNUNET_PEER_intern (pi);
4137 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
4138 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4140 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4141 path = path_new (size);
4143 for (i = 0; i < size; i++)
4145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4146 GNUNET_i2s (&pi[i]));
4147 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4148 if (path->peers[i] == myid)
4151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4154 /* cannot be self, must be 'not found' */
4155 /* create path: self not found in path through self */
4156 GNUNET_break_op (0);
4157 path_destroy (path);
4158 /* FIXME error. destroy tunnel? leave for timeout? */
4161 path_add_to_peers (path, GNUNET_NO);
4162 tunnel_add_path (t, path, own_pos);
4163 if (own_pos == size - 1)
4165 /* It is for us! Send ack. */
4166 struct MeshTransmissionDescriptor *info;
4168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4169 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4170 if (NULL == t->peers)
4172 /* New tunnel! Notify clients on data. */
4173 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
4175 GNUNET_break (GNUNET_SYSERR !=
4176 GNUNET_CONTAINER_multihashmap_put (t->peers,
4177 &my_full_id.hashPubKey,
4180 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
4181 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
4182 info->origin = &t->id;
4183 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4184 GNUNET_assert (NULL != info->peer);
4186 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4187 sizeof (struct GNUNET_MESH_PathACK),
4193 struct MeshPeerPath *path2;
4195 /* It's for somebody else! Retransmit. */
4196 path2 = path_duplicate (path);
4197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4198 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4199 path2 = path_duplicate (path);
4200 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
4201 send_create_path (dest_peer_info, path, t);
4208 * Core handler for path destruction
4210 * @param cls closure
4211 * @param message message
4212 * @param peer peer identity this notification is about
4213 * @param atsi performance data
4214 * @param atsi_count number of records in 'atsi'
4216 * @return GNUNET_OK to keep the connection open,
4217 * GNUNET_SYSERR to close it (signal serious error)
4220 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4221 const struct GNUNET_MessageHeader *message,
4222 const struct GNUNET_ATS_Information *atsi,
4223 unsigned int atsi_count)
4225 struct GNUNET_MESH_ManipulatePath *msg;
4226 struct GNUNET_PeerIdentity *pi;
4227 struct MeshPeerPath *path;
4228 struct MeshTunnel *t;
4229 unsigned int own_pos;
4233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4234 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
4235 size = ntohs (message->size);
4236 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4238 GNUNET_break_op (0);
4242 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4243 if (size % sizeof (struct GNUNET_PeerIdentity))
4245 GNUNET_break_op (0);
4248 size /= sizeof (struct GNUNET_PeerIdentity);
4251 GNUNET_break_op (0);
4254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4256 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4257 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4259 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
4261 t = tunnel_get (pi, ntohl (msg->tid));
4264 /* TODO notify back: we don't know this tunnel */
4265 GNUNET_break_op (0);
4268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4269 path = path_new (size);
4271 for (i = 0; i < size; i++)
4273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4274 GNUNET_i2s (&pi[i]));
4275 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4276 if (path->peers[i] == myid)
4279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4280 if (own_pos < path->length - 1)
4281 send_message (message, &pi[own_pos + 1], t);
4283 send_client_tunnel_disconnect(t, NULL);
4285 tunnel_delete_peer (t, path->peers[path->length - 1]);
4286 path_destroy (path);
4292 * Core handler for notifications of broken paths
4294 * @param cls closure
4295 * @param message message
4296 * @param peer peer identity this notification is about
4297 * @param atsi performance data
4298 * @param atsi_count number of records in 'atsi'
4300 * @return GNUNET_OK to keep the connection open,
4301 * GNUNET_SYSERR to close it (signal serious error)
4304 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4305 const struct GNUNET_MessageHeader *message,
4306 const struct GNUNET_ATS_Information *atsi,
4307 unsigned int atsi_count)
4309 struct GNUNET_MESH_PathBroken *msg;
4310 struct MeshTunnel *t;
4312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4313 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4314 msg = (struct GNUNET_MESH_PathBroken *) message;
4315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4316 GNUNET_i2s (&msg->peer1));
4317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4318 GNUNET_i2s (&msg->peer2));
4319 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4322 GNUNET_break_op (0);
4325 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4326 GNUNET_PEER_search (&msg->peer2));
4333 * Core handler for tunnel destruction
4335 * @param cls closure
4336 * @param message message
4337 * @param peer peer identity this notification is about
4338 * @param atsi performance data
4339 * @param atsi_count number of records in 'atsi'
4341 * @return GNUNET_OK to keep the connection open,
4342 * GNUNET_SYSERR to close it (signal serious error)
4345 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4346 const struct GNUNET_MessageHeader *message,
4347 const struct GNUNET_ATS_Information *atsi,
4348 unsigned int atsi_count)
4350 struct GNUNET_MESH_TunnelDestroy *msg;
4351 struct MeshTunnel *t;
4353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4354 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
4355 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
4357 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4358 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4361 /* Probably already got the message from another path,
4362 * destroyed the tunnel and retransmitted to children.
4365 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4368 if (t->id.oid == myid)
4370 GNUNET_break_op (0);
4373 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4375 /* Tunnel was incoming, notify clients */
4376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4377 t->local_tid, t->local_tid_dest);
4378 send_clients_tunnel_destroy (t);
4380 tunnel_send_destroy (t);
4381 t->destroy = GNUNET_YES;
4382 // TODO: add timeout to destroy the tunnel anyway
4388 * Core handler for mesh network traffic going from the origin to a peer
4390 * @param cls closure
4391 * @param peer peer identity this notification is about
4392 * @param message message
4393 * @param atsi performance data
4394 * @param atsi_count number of records in 'atsi'
4395 * @return GNUNET_OK to keep the connection open,
4396 * GNUNET_SYSERR to close it (signal serious error)
4399 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4400 const struct GNUNET_MessageHeader *message,
4401 const struct GNUNET_ATS_Information *atsi,
4402 unsigned int atsi_count)
4404 struct GNUNET_MESH_Unicast *msg;
4405 struct GNUNET_PeerIdentity *neighbor;
4406 struct MeshTunnelChildInfo *cinfo;
4407 struct MeshTunnel *t;
4408 GNUNET_PEER_Id dest_id;
4413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
4415 size = ntohs (message->size);
4417 sizeof (struct GNUNET_MESH_Unicast) +
4418 sizeof (struct GNUNET_MessageHeader))
4423 msg = (struct GNUNET_MESH_Unicast *) message;
4424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4425 ntohs (msg[1].header.type));
4426 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4429 /* TODO notify back: we don't know this tunnel */
4430 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4431 GNUNET_break_op (0);
4434 pid = ntohl (msg->pid);
4437 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4438 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4439 " Already seen pid %u, DROPPING!\n", pid);
4444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4445 " pid %u not seen yet, forwarding\n", pid);
4447 t->skip += (pid - t->pid) - 1;
4449 tunnel_reset_timeout (t);
4450 dest_id = GNUNET_PEER_search (&msg->destination);
4451 if (dest_id == myid)
4453 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4454 " it's for us! sending to clients...\n");
4455 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
4456 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
4457 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK); // FIXME send after client processes the packet
4460 ttl = ntohl (msg->ttl);
4461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4464 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4465 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4469 " not for us, retransmitting...\n");
4470 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4472 neighbor = tree_get_first_hop (t->tree, dest_id);
4473 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
4474 &neighbor->hashPubKey);
4477 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
4478 cinfo->id = GNUNET_PEER_intern (neighbor);
4480 cinfo->max_pid = pid + t->queue_max - t->queue_n; // FIXME review
4482 GNUNET_assert (GNUNET_OK ==
4483 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
4484 &neighbor->hashPubKey,
4486 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
4489 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4492 send_message (message, neighbor, t);
4498 * Core handler for mesh network traffic going from the origin to all peers
4500 * @param cls closure
4501 * @param message message
4502 * @param peer peer identity this notification is about
4503 * @param atsi performance data
4504 * @param atsi_count number of records in 'atsi'
4505 * @return GNUNET_OK to keep the connection open,
4506 * GNUNET_SYSERR to close it (signal serious error)
4508 * TODO: Check who we got this from, to validate route.
4511 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4512 const struct GNUNET_MessageHeader *message,
4513 const struct GNUNET_ATS_Information *atsi,
4514 unsigned int atsi_count)
4516 struct GNUNET_MESH_Multicast *msg;
4517 struct MeshTunnel *t;
4521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
4523 size = ntohs (message->size);
4524 if (sizeof (struct GNUNET_MESH_Multicast) +
4525 sizeof (struct GNUNET_MessageHeader) > size)
4527 GNUNET_break_op (0);
4530 msg = (struct GNUNET_MESH_Multicast *) message;
4531 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4535 /* TODO notify that we dont know that tunnel */
4536 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4537 GNUNET_break_op (0);
4540 pid = ntohl (msg->pid);
4543 /* already seen this packet, drop */
4544 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4545 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4546 " Already seen pid %u, DROPPING!\n", pid);
4551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4552 " pid %u not seen yet, forwarding\n", pid);
4554 t->skip += (pid - t->pid) - 1;
4556 tunnel_reset_timeout (t);
4558 /* Transmit to locally interested clients */
4559 if (NULL != t->peers &&
4560 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
4562 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
4563 send_subscribed_clients (message, &msg[1].header);
4565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
4566 if (ntohl (msg->ttl) == 0)
4568 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4569 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4572 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
4573 tunnel_send_multicast (t, message, GNUNET_NO);
4579 * Core handler for mesh network traffic toward the owner of a tunnel
4581 * @param cls closure
4582 * @param message message
4583 * @param peer peer identity this notification is about
4584 * @param atsi performance data
4585 * @param atsi_count number of records in 'atsi'
4587 * @return GNUNET_OK to keep the connection open,
4588 * GNUNET_SYSERR to close it (signal serious error)
4591 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4592 const struct GNUNET_MessageHeader *message,
4593 const struct GNUNET_ATS_Information *atsi,
4594 unsigned int atsi_count)
4596 struct GNUNET_MESH_ToOrigin *msg;
4597 struct GNUNET_PeerIdentity id;
4598 struct MeshPeerInfo *peer_info;
4599 struct MeshTunnel *t;
4602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
4604 size = ntohs (message->size);
4605 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
4606 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
4608 GNUNET_break_op (0);
4611 msg = (struct GNUNET_MESH_ToOrigin *) message;
4612 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4613 ntohs (msg[1].header.type));
4614 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4618 /* TODO notify that we dont know this tunnel (whom)? */
4619 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4620 GNUNET_break_op (0);
4624 if (t->id.oid == myid)
4627 struct GNUNET_MESH_ToOrigin *copy;
4629 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4630 " it's for us! sending to clients...\n");
4631 if (NULL == t->owner)
4633 /* got data packet for ownerless tunnel */
4634 GNUNET_STATISTICS_update (stats, "# data on ownerless tunnel",
4636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no clients!\n");
4637 GNUNET_break_op (0);
4640 /* TODO signature verification */
4641 memcpy (cbuf, message, size);
4642 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
4643 copy->tid = htonl (t->local_tid);
4644 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
4645 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
4646 ©->header, GNUNET_YES);
4649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4650 " not for us, retransmitting...\n");
4652 peer_info = peer_info_get (&msg->oid);
4653 if (NULL == peer_info)
4655 /* unknown origin of tunnel */
4659 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4660 send_message (message, &id, t);
4661 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
4668 * Core handler for mesh network traffic point-to-point acks.
4670 * @param cls closure
4671 * @param message message
4672 * @param peer peer identity this notification is about
4673 * @param atsi performance data
4674 * @param atsi_count number of records in 'atsi'
4676 * @return GNUNET_OK to keep the connection open,
4677 * GNUNET_SYSERR to close it (signal serious error)
4680 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4681 const struct GNUNET_MessageHeader *message,
4682 const struct GNUNET_ATS_Information *atsi,
4683 unsigned int atsi_count)
4685 struct GNUNET_MESH_ACK *msg;
4686 struct MeshTunnelChildInfo *cinfo;
4687 struct MeshTunnel *t;
4690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got an ACK packet from %s\n",
4692 msg = (struct GNUNET_MESH_ACK *) message;
4693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4694 ntohs (msg[1].header.type));
4695 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4699 /* TODO notify that we dont know this tunnel (whom)? */
4700 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4701 GNUNET_break_op (0);
4704 ack = ntohl (msg->pid);
4705 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
4709 GNUNET_break_op (0);
4712 cinfo->max_pid = ack;
4713 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4719 * Core handler for path ACKs
4721 * @param cls closure
4722 * @param message message
4723 * @param peer peer identity this notification is about
4724 * @param atsi performance data
4725 * @param atsi_count number of records in 'atsi'
4727 * @return GNUNET_OK to keep the connection open,
4728 * GNUNET_SYSERR to close it (signal serious error)
4731 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4732 const struct GNUNET_MessageHeader *message,
4733 const struct GNUNET_ATS_Information *atsi,
4734 unsigned int atsi_count)
4736 struct GNUNET_MESH_PathACK *msg;
4737 struct GNUNET_PeerIdentity id;
4738 struct MeshPeerInfo *peer_info;
4739 struct MeshPeerPath *p;
4740 struct MeshTunnel *t;
4742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4743 GNUNET_i2s (&my_full_id));
4744 msg = (struct GNUNET_MESH_PathACK *) message;
4745 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4748 /* TODO notify that we don't know the tunnel */
4749 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4751 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4755 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4757 peer_info = peer_info_get (&msg->peer_id);
4758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4759 GNUNET_i2s (&msg->peer_id));
4760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4763 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
4765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4766 "connect_by_string completed, stopping search\n");
4767 regex_cancel_search (t->regex_ctx);
4768 t->regex_ctx = NULL;
4771 /* Add paths to peers? */
4772 p = tree_get_path_to_peer (t->tree, peer_info->id);
4775 path_add_to_peers (p, GNUNET_YES);
4783 /* Message for us? */
4784 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4787 if (NULL == t->owner)
4789 GNUNET_break_op (0);
4792 if (NULL != t->dht_get_type)
4794 GNUNET_DHT_get_stop (t->dht_get_type);
4795 t->dht_get_type = NULL;
4797 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
4799 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
4800 send_client_peer_connected (t, peer_info->id);
4805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4806 " not for us, retransmitting...\n");
4807 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4808 peer_info = peer_info_get (&msg->oid);
4809 if (NULL == peer_info)
4811 /* If we know the tunnel, we should DEFINITELY know the peer */
4815 send_message (message, &id, t);
4821 * Functions to handle messages from core
4823 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4824 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4825 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
4826 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4827 sizeof (struct GNUNET_MESH_PathBroken)},
4828 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4829 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4830 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4831 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
4832 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4833 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4834 sizeof (struct GNUNET_MESH_ACK)},
4835 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4836 sizeof (struct GNUNET_MESH_PathACK)},
4842 /******************************************************************************/
4843 /**************** MESH LOCAL HANDLER HELPERS ***********************/
4844 /******************************************************************************/
4847 * deregister_app: iterator for removing each application registered by a client
4849 * @param cls closure
4850 * @param key the hash of the application id (used to access the hashmap)
4851 * @param value the value stored at the key (client)
4853 * @return GNUNET_OK on success
4856 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
4858 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
4859 GNUNET_break (GNUNET_YES ==
4860 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
4866 * notify_client_connection_failure: notify a client that the connection to the
4867 * requested remote peer is not possible (for instance, no route found)
4868 * Function called when the socket is ready to queue more data. "buf" will be
4869 * NULL and "size" zero if the socket was closed for writing in the meantime.
4871 * @param cls closure
4872 * @param size number of bytes available in buf
4873 * @param buf where the callee should write the message
4874 * @return number of bytes written to buf
4877 notify_client_connection_failure (void *cls, size_t size, void *buf)
4880 struct MeshPeerInfo *peer_info;
4881 struct GNUNET_MESH_PeerControl *msg;
4882 struct GNUNET_PeerIdentity id;
4884 if (0 == size && NULL == buf)
4886 // TODO retry? cancel?
4890 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
4891 peer_info = (struct MeshPeerInfo *) cls;
4892 msg = (struct GNUNET_MESH_PeerControl *) buf;
4893 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
4894 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
4895 // msg->tunnel_id = htonl(peer_info->t->tid);
4896 GNUNET_PEER_resolve (peer_info->id, &id);
4897 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
4905 * Send keepalive packets for a peer
4907 * @param cls Closure (tunnel for which to send the keepalive).
4908 * @param tc Notification context.
4910 * TODO: implement explicit multicast keepalive?
4913 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4915 struct MeshTunnel *t = cls;
4916 struct GNUNET_MessageHeader *payload;
4917 struct GNUNET_MESH_Multicast *msg;
4919 sizeof (struct GNUNET_MESH_Multicast) +
4920 sizeof (struct GNUNET_MessageHeader);
4923 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4927 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
4929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4930 "sending keepalive for tunnel %d\n", t->id.tid);
4932 msg = (struct GNUNET_MESH_Multicast *) cbuf;
4933 msg->header.size = htons (size);
4934 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
4935 msg->oid = my_full_id;
4936 msg->tid = htonl (t->id.tid);
4937 msg->ttl = htonl (default_ttl);
4938 msg->pid = htonl (t->pid + 1);
4940 payload = (struct GNUNET_MessageHeader *) &msg[1];
4941 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
4942 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
4943 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
4945 t->path_refresh_task =
4946 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
4952 * Function to process paths received for a new peer addition. The recorded
4953 * paths form the initial tunnel, which can be optimized later.
4954 * Called on each result obtained for the DHT search.
4956 * @param cls closure
4957 * @param exp when will this value expire
4958 * @param key key of the result
4959 * @param get_path path of the get request
4960 * @param get_path_length lenght of get_path
4961 * @param put_path path of the put request
4962 * @param put_path_length length of the put_path
4963 * @param type type of the result
4964 * @param size number of bytes in data
4965 * @param data pointer to the result data
4967 * TODO: re-issue the request after certain time? cancel after X results?
4970 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4971 const struct GNUNET_HashCode * key,
4972 const struct GNUNET_PeerIdentity *get_path,
4973 unsigned int get_path_length,
4974 const struct GNUNET_PeerIdentity *put_path,
4975 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4976 size_t size, const void *data)
4978 struct MeshPathInfo *path_info = cls;
4979 struct MeshPeerPath *p;
4980 struct GNUNET_PeerIdentity pi;
4983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4984 GNUNET_PEER_resolve (path_info->peer->id, &pi);
4985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4987 p = path_build_from_dht (get_path, get_path_length, put_path,
4989 path_add_to_peers (p, GNUNET_NO);
4991 for (i = 0; i < path_info->peer->ntunnels; i++)
4993 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
4994 peer_info_connect (path_info->peer, path_info->t);
5002 * Function to process paths received for a new peer addition. The recorded
5003 * paths form the initial tunnel, which can be optimized later.
5004 * Called on each result obtained for the DHT search.
5006 * @param cls closure
5007 * @param exp when will this value expire
5008 * @param key key of the result
5009 * @param get_path path of the get request
5010 * @param get_path_length lenght of get_path
5011 * @param put_path path of the put request
5012 * @param put_path_length length of the put_path
5013 * @param type type of the result
5014 * @param size number of bytes in data
5015 * @param data pointer to the result data
5018 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5019 const struct GNUNET_HashCode * key,
5020 const struct GNUNET_PeerIdentity *get_path,
5021 unsigned int get_path_length,
5022 const struct GNUNET_PeerIdentity *put_path,
5023 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5024 size_t size, const void *data)
5026 const struct PBlock *pb = data;
5027 const struct GNUNET_PeerIdentity *pi = &pb->id;
5028 struct MeshTunnel *t = cls;
5029 struct MeshPeerInfo *peer_info;
5030 struct MeshPeerPath *p;
5032 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
5033 if (size != sizeof (struct PBlock))
5035 GNUNET_break_op (0);
5038 if (ntohl(pb->type) != t->type)
5040 GNUNET_break_op (0);
5043 GNUNET_assert (NULL != t->owner);
5044 peer_info = peer_info_get (pi);
5045 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
5047 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
5049 p = path_build_from_dht (get_path, get_path_length, put_path,
5051 path_add_to_peers (p, GNUNET_NO);
5053 tunnel_add_peer (t, peer_info);
5054 peer_info_connect (peer_info, t);
5059 * Function to process DHT string to regex matching.
5060 * Called on each result obtained for the DHT search.
5062 * @param cls closure (search context)
5063 * @param exp when will this value expire
5064 * @param key key of the result
5065 * @param get_path path of the get request (not used)
5066 * @param get_path_length lenght of get_path (not used)
5067 * @param put_path path of the put request (not used)
5068 * @param put_path_length length of the put_path (not used)
5069 * @param type type of the result
5070 * @param size number of bytes in data
5071 * @param data pointer to the result data
5074 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5075 const struct GNUNET_HashCode * key,
5076 const struct GNUNET_PeerIdentity *get_path,
5077 unsigned int get_path_length,
5078 const struct GNUNET_PeerIdentity *put_path,
5079 unsigned int put_path_length,
5080 enum GNUNET_BLOCK_Type type,
5081 size_t size, const void *data)
5083 const struct MeshRegexAccept *block = data;
5084 struct MeshRegexSearchContext *ctx = cls;
5085 struct MeshRegexSearchInfo *info = ctx->info;
5086 struct MeshPeerPath *p;
5087 struct MeshPeerInfo *peer_info;
5089 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
5090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
5092 peer_info = peer_info_get(&block->id);
5093 p = path_build_from_dht (get_path, get_path_length, put_path,
5095 path_add_to_peers (p, GNUNET_NO);
5098 tunnel_add_peer (info->t, peer_info);
5099 peer_info_connect (peer_info, info->t);
5100 if (0 == info->peer)
5102 info->peer = peer_info->id;
5106 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
5109 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
5110 ®ex_connect_timeout,
5118 * Function to process DHT string to regex matching.
5119 * Called on each result obtained for the DHT search.
5121 * @param cls closure (search context)
5122 * @param exp when will this value expire
5123 * @param key key of the result
5124 * @param get_path path of the get request (not used)
5125 * @param get_path_length lenght of get_path (not used)
5126 * @param put_path path of the put request (not used)
5127 * @param put_path_length length of the put_path (not used)
5128 * @param type type of the result
5129 * @param size number of bytes in data
5130 * @param data pointer to the result data
5132 * TODO: re-issue the request after certain time? cancel after X results?
5135 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5136 const struct GNUNET_HashCode * key,
5137 const struct GNUNET_PeerIdentity *get_path,
5138 unsigned int get_path_length,
5139 const struct GNUNET_PeerIdentity *put_path,
5140 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5141 size_t size, const void *data)
5143 const struct MeshRegexBlock *block = data;
5144 struct MeshRegexSearchContext *ctx = cls;
5145 struct MeshRegexSearchInfo *info = ctx->info;
5149 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5150 "DHT GET STRING RETURNED RESULTS\n");
5151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5152 " key: %s\n", GNUNET_h2s (key));
5154 copy = GNUNET_malloc (size);
5155 memcpy (copy, data, size);
5156 GNUNET_break (GNUNET_OK ==
5157 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
5158 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
5159 len = ntohl (block->n_proof);
5161 char proof[len + 1];
5163 memcpy (proof, &block[1], len);
5165 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
5167 GNUNET_break_op (0);
5171 len = strlen (info->description);
5172 if (len == ctx->position) // String processed
5174 if (GNUNET_YES == ntohl (block->accepting))
5176 regex_find_path(key, ctx);
5180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
5181 // FIXME REGEX this block not successful, wait for more? start timeout?
5185 GNUNET_break (GNUNET_OK ==
5186 GNUNET_MESH_regex_block_iterate (block, size,
5187 ®ex_edge_iterator, ctx));
5191 /******************************************************************************/
5192 /********************* MESH LOCAL HANDLES **************************/
5193 /******************************************************************************/
5197 * Handler for client disconnection
5199 * @param cls closure
5200 * @param client identification of the client; NULL
5201 * for the last call when the server is destroyed
5204 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
5206 struct MeshClient *c;
5207 struct MeshClient *next;
5210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
5213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
5219 if (c->handle != client)
5221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
5225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
5227 GNUNET_SERVER_client_drop (c->handle);
5228 c->shutting_down = GNUNET_YES;
5229 GNUNET_assert (NULL != c->own_tunnels);
5230 GNUNET_assert (NULL != c->incoming_tunnels);
5231 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
5232 &tunnel_destroy_iterator, c);
5233 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
5234 &tunnel_destroy_iterator, c);
5235 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
5236 &tunnel_destroy_iterator, c);
5237 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
5238 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
5239 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
5241 /* deregister clients applications */
5242 if (NULL != c->apps)
5244 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
5245 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
5247 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
5248 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
5250 GNUNET_SCHEDULER_cancel (announce_applications_task);
5251 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
5253 if (NULL != c->types)
5254 GNUNET_CONTAINER_multihashmap_destroy (c->types);
5255 for (i = 0; i < c->n_regex; i++)
5257 GNUNET_free (c->regexes[i]);
5259 GNUNET_free_non_null (c->regexes);
5260 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
5261 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
5263 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
5264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
5266 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
5269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
5275 * Handler for new clients
5277 * @param cls closure
5278 * @param client identification of the client
5279 * @param message the actual message, which includes messages the client wants
5282 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
5283 const struct GNUNET_MessageHeader *message)
5285 struct GNUNET_MESH_ClientConnect *cc_msg;
5286 struct MeshClient *c;
5287 GNUNET_MESH_ApplicationType *a;
5294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
5295 /* Check data sanity */
5296 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
5297 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
5298 ntypes = ntohs (cc_msg->types);
5299 napps = ntohs (cc_msg->applications);
5301 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
5304 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5308 /* Create new client structure */
5309 c = GNUNET_malloc (sizeof (struct MeshClient));
5310 c->id = next_client_id++;
5311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
5313 GNUNET_SERVER_client_keep (client);
5314 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
5317 GNUNET_MESH_ApplicationType at;
5318 struct GNUNET_HashCode hc;
5320 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
5321 for (i = 0; i < napps; i++)
5324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
5325 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
5326 /* store in clients hashmap */
5327 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
5328 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5329 /* store in global hashmap, for announcements */
5330 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
5331 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5333 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
5334 announce_applications_task =
5335 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
5341 struct GNUNET_HashCode hc;
5343 t = (uint16_t *) & a[napps];
5344 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
5345 for (i = 0; i < ntypes; i++)
5348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
5349 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
5351 /* store in clients hashmap */
5352 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
5353 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5354 /* store in global hashmap */
5355 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
5356 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5360 " client has %u+%u subscriptions\n", napps, ntypes);
5362 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
5363 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5364 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5365 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5366 GNUNET_SERVER_notification_context_add (nc, client);
5367 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
5369 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
5375 * Handler for clients announcing available services by a regular expression.
5377 * @param cls closure
5378 * @param client identification of the client
5379 * @param message the actual message, which includes messages the client wants
5382 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
5383 const struct GNUNET_MessageHeader *message)
5385 struct MeshClient *c;
5389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
5391 /* Sanity check for client registration */
5392 if (NULL == (c = client_get (client)))
5395 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5400 len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
5401 regex = GNUNET_malloc (len + 1);
5402 memcpy (regex, &message[1], len);
5404 GNUNET_array_append (c->regexes, c->n_regex, regex);
5405 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
5407 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
5413 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
5419 * Handler for requests of new tunnels
5421 * @param cls closure
5422 * @param client identification of the client
5423 * @param message the actual message
5426 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
5427 const struct GNUNET_MessageHeader *message)
5429 struct GNUNET_MESH_TunnelMessage *t_msg;
5430 struct MeshTunnel *t;
5431 struct MeshClient *c;
5433 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
5435 /* Sanity check for client registration */
5436 if (NULL == (c = client_get (client)))
5439 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5444 /* Message sanity check */
5445 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5448 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5452 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5453 /* Sanity check for tunnel numbering */
5454 if (0 == (ntohl (t_msg->tunnel_id) & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
5457 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5460 /* Sanity check for duplicate tunnel IDs */
5461 if (NULL != tunnel_get_by_local_id (c, ntohl (t_msg->tunnel_id)))
5464 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5468 while (NULL != tunnel_get_by_pi (myid, next_tid))
5469 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5470 t = tunnel_new (myid, next_tid++, c, ntohl (t_msg->tunnel_id));
5473 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
5474 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5477 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
5479 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
5480 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
5482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
5483 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5489 * Handler for requests of deleting tunnels
5491 * @param cls closure
5492 * @param client identification of the client
5493 * @param message the actual message
5496 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
5497 const struct GNUNET_MessageHeader *message)
5499 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5500 struct MeshClient *c;
5501 struct MeshTunnel *t;
5502 MESH_TunnelNumber tid;
5504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5505 "Got a DESTROY TUNNEL from client!\n");
5507 /* Sanity check for client registration */
5508 if (NULL == (c = client_get (client)))
5511 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5514 /* Message sanity check */
5515 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5518 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5522 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5524 /* Retrieve tunnel */
5525 tid = ntohl (tunnel_msg->tunnel_id);
5526 t = tunnel_get_by_local_id(c, tid);
5530 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5531 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5534 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5536 client_ignore_tunnel (c, t);
5538 // TODO: when to destroy incoming tunnel?
5539 if (t->nclients == 0)
5541 GNUNET_assert (GNUNET_YES ==
5542 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
5544 GNUNET_assert (GNUNET_YES ==
5545 GNUNET_CONTAINER_multihashmap_remove (t->peers,
5546 &my_full_id.hashPubKey,
5550 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5553 send_client_tunnel_disconnect(t, c);
5554 client_delete_tunnel(c, t);
5556 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
5558 tunnel_send_destroy (t);
5559 t->destroy = GNUNET_YES;
5560 // The tunnel will be destroyed when the last message is transmitted.
5561 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5567 * Handler for requests of seeting tunnel's speed.
5569 * @param cls Closure (unused).
5570 * @param client Identification of the client.
5571 * @param message The actual message.
5574 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
5575 const struct GNUNET_MessageHeader *message)
5577 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5578 struct MeshClient *c;
5579 struct MeshTunnel *t;
5580 MESH_TunnelNumber tid;
5582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5583 "Got a SPEED request from client!\n");
5585 /* Sanity check for client registration */
5586 if (NULL == (c = client_get (client)))
5589 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5594 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5596 /* Retrieve tunnel */
5597 tid = ntohl (tunnel_msg->tunnel_id);
5598 t = tunnel_get_by_local_id(c, tid);
5602 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5603 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5607 switch (ntohs(message->type))
5609 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
5610 t->speed_min = GNUNET_YES;
5612 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
5613 t->speed_min = GNUNET_NO;
5618 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5623 * Handler for requests of seeting tunnel's buffering policy.
5625 * @param cls Closure (unused).
5626 * @param client Identification of the client.
5627 * @param message The actual message.
5630 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
5631 const struct GNUNET_MessageHeader *message)
5633 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5634 struct MeshClient *c;
5635 struct MeshTunnel *t;
5636 MESH_TunnelNumber tid;
5638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5639 "Got a BUFFER request from client!\n");
5641 /* Sanity check for client registration */
5642 if (NULL == (c = client_get (client)))
5645 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5650 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5652 /* Retrieve tunnel */
5653 tid = ntohl (tunnel_msg->tunnel_id);
5654 t = tunnel_get_by_local_id(c, tid);
5658 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5659 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5663 switch (ntohs(message->type))
5665 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
5666 t->nobuffer = GNUNET_NO;
5668 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
5669 t->nobuffer = GNUNET_YES;
5675 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5680 * Handler for connection requests to new peers
5682 * @param cls closure
5683 * @param client identification of the client
5684 * @param message the actual message (PeerControl)
5687 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
5688 const struct GNUNET_MessageHeader *message)
5690 struct GNUNET_MESH_PeerControl *peer_msg;
5691 struct MeshPeerInfo *peer_info;
5692 struct MeshClient *c;
5693 struct MeshTunnel *t;
5694 MESH_TunnelNumber tid;
5696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
5697 /* Sanity check for client registration */
5698 if (NULL == (c = client_get (client)))
5701 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5705 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5706 /* Sanity check for message size */
5707 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5710 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5714 /* Tunnel exists? */
5715 tid = ntohl (peer_msg->tunnel_id);
5716 t = tunnel_get_by_local_id (c, tid);
5720 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5724 /* Does client own tunnel? */
5725 if (t->owner->handle != client)
5728 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
5732 GNUNET_i2s (&peer_msg->peer));
5733 peer_info = peer_info_get (&peer_msg->peer);
5735 tunnel_add_peer (t, peer_info);
5736 peer_info_connect (peer_info, t);
5738 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5744 * Handler for disconnection requests of peers in a tunnel
5746 * @param cls closure
5747 * @param client identification of the client
5748 * @param message the actual message (PeerControl)
5751 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
5752 const struct GNUNET_MessageHeader *message)
5754 struct GNUNET_MESH_PeerControl *peer_msg;
5755 struct MeshPeerInfo *peer_info;
5756 struct MeshClient *c;
5757 struct MeshTunnel *t;
5758 MESH_TunnelNumber tid;
5760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
5761 /* Sanity check for client registration */
5762 if (NULL == (c = client_get (client)))
5765 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5768 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5769 /* Sanity check for message size */
5770 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5773 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5777 /* Tunnel exists? */
5778 tid = ntohl (peer_msg->tunnel_id);
5779 t = tunnel_get_by_local_id (c, tid);
5783 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5788 /* Does client own tunnel? */
5789 if (t->owner->handle != client)
5792 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
5797 GNUNET_i2s (&peer_msg->peer));
5798 /* Is the peer in the tunnel? */
5800 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
5801 if (NULL == peer_info)
5804 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5808 /* Ok, delete peer from tunnel */
5809 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
5810 &peer_msg->peer.hashPubKey);
5812 send_destroy_path (t, peer_info->id);
5813 tunnel_delete_peer (t, peer_info->id);
5814 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5819 * Handler for blacklist requests of peers in a tunnel
5821 * @param cls closure
5822 * @param client identification of the client
5823 * @param message the actual message (PeerControl)
5826 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
5827 const struct GNUNET_MessageHeader *message)
5829 struct GNUNET_MESH_PeerControl *peer_msg;
5830 struct MeshClient *c;
5831 struct MeshTunnel *t;
5832 MESH_TunnelNumber tid;
5834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
5835 /* Sanity check for client registration */
5836 if (NULL == (c = client_get (client)))
5839 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5842 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5844 /* Sanity check for message size */
5845 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5848 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5852 /* Tunnel exists? */
5853 tid = ntohl (peer_msg->tunnel_id);
5854 t = tunnel_get_by_local_id (c, tid);
5858 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5863 GNUNET_array_append(t->blacklisted, t->nblacklisted,
5864 GNUNET_PEER_intern(&peer_msg->peer));
5869 * Handler for unblacklist requests of peers in a tunnel
5871 * @param cls closure
5872 * @param client identification of the client
5873 * @param message the actual message (PeerControl)
5876 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
5877 const struct GNUNET_MessageHeader *message)
5879 struct GNUNET_MESH_PeerControl *peer_msg;
5880 struct MeshClient *c;
5881 struct MeshTunnel *t;
5882 MESH_TunnelNumber tid;
5886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
5887 /* Sanity check for client registration */
5888 if (NULL == (c = client_get (client)))
5891 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5894 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
5896 /* Sanity check for message size */
5897 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
5900 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5904 /* Tunnel exists? */
5905 tid = ntohl (peer_msg->tunnel_id);
5906 t = tunnel_get_by_local_id (c, tid);
5910 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
5915 /* if peer is not known, complain */
5916 pid = GNUNET_PEER_search (&peer_msg->peer);
5923 /* search and remove from list */
5924 for (i = 0; i < t->nblacklisted; i++)
5926 if (t->blacklisted[i] == pid)
5928 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
5929 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
5934 /* if peer hasn't been blacklisted, complain */
5940 * Handler for connection requests to new peers by type
5942 * @param cls closure
5943 * @param client identification of the client
5944 * @param message the actual message (ConnectPeerByType)
5947 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
5948 const struct GNUNET_MessageHeader *message)
5950 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
5951 struct MeshClient *c;
5952 struct MeshTunnel *t;
5953 struct GNUNET_HashCode hash;
5954 MESH_TunnelNumber tid;
5956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
5957 /* Sanity check for client registration */
5958 if (NULL == (c = client_get (client)))
5961 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5965 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
5966 /* Sanity check for message size */
5967 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
5968 ntohs (connect_msg->header.size))
5971 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5975 /* Tunnel exists? */
5976 tid = ntohl (connect_msg->tunnel_id);
5977 t = tunnel_get_by_local_id (c, tid);
5981 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5985 /* Does client own tunnel? */
5986 if (t->owner->handle != client)
5989 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5993 /* Do WE have the service? */
5994 t->type = ntohl (connect_msg->type);
5995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
5996 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
5997 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
6000 /* Yes! Fast forward, add ourselves to the tunnel and send the
6001 * good news to the client, and alert the destination client of
6002 * an incoming tunnel.
6004 * FIXME send a path create to self, avoid code duplication
6006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
6007 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
6008 peer_info_get (&my_full_id),
6009 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
6012 send_client_peer_connected (t, myid);
6013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
6014 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6016 t->local_tid_dest = next_local_tid++;
6017 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
6018 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
6019 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6023 /* Ok, lets find a peer offering the service */
6024 if (NULL != t->dht_get_type)
6026 GNUNET_DHT_get_stop (t->dht_get_type);
6028 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
6029 GNUNET_h2s (&hash));
6031 GNUNET_DHT_get_start (dht_handle,
6032 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
6034 dht_replication_level,
6035 GNUNET_DHT_RO_RECORD_ROUTE |
6036 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6038 &dht_get_type_handler, t);
6040 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6046 * Handler for connection requests to new peers by a string service description.
6048 * @param cls closure
6049 * @param client identification of the client
6050 * @param message the actual message, which includes messages the client wants
6053 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
6054 const struct GNUNET_MessageHeader *message)
6056 struct GNUNET_MESH_ConnectPeerByString *msg;
6057 struct MeshRegexSearchContext *ctx;
6058 struct MeshRegexSearchInfo *info;
6059 struct GNUNET_DHT_GetHandle *get_h;
6060 struct GNUNET_HashCode key;
6061 struct MeshTunnel *t;
6062 struct MeshClient *c;
6063 MESH_TunnelNumber tid;
6067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6068 "Connect by string started\n");
6069 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
6070 size = htons (message->size);
6072 /* Sanity check for client registration */
6073 if (NULL == (c = client_get (client)))
6076 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6080 /* Message size sanity check */
6081 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
6084 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6088 /* Tunnel exists? */
6089 tid = ntohl (msg->tunnel_id);
6090 t = tunnel_get_by_local_id (c, tid);
6094 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6098 /* Does client own tunnel? */
6099 if (t->owner->handle != client)
6102 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6107 " on tunnel %s [%u]\n",
6108 GNUNET_i2s(&my_full_id),
6111 /* Only one connect_by_string allowed at the same time! */
6112 /* FIXME: allow more, return handle at api level to cancel, document */
6113 if (NULL != t->regex_ctx)
6116 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6120 /* Find string itself */
6121 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
6122 string = (const char *) &msg[1];
6124 /* Initialize context */
6125 size = GNUNET_REGEX_get_first_key(string, len, &key);
6126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6127 " consumed %u bits out of %u\n", size, len);
6128 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6129 " looking for %s\n", GNUNET_h2s (&key));
6131 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
6133 info->description = GNUNET_malloc (len + 1);
6134 memcpy (info->description, string, len);
6135 info->description[len] = '\0';
6136 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32);
6137 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32);
6138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
6140 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
6141 ctx->position = size;
6145 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
6147 /* Start search in DHT */
6148 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
6149 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
6150 &key, /* key to search */
6151 dht_replication_level, /* replication level */
6152 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6153 NULL, /* xquery */ // FIXME BLOOMFILTER
6154 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
6155 &dht_get_string_handler, ctx);
6157 GNUNET_break (GNUNET_OK ==
6158 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
6161 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
6163 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
6169 * Handler for client traffic directed to one peer
6171 * @param cls closure
6172 * @param client identification of the client
6173 * @param message the actual message
6176 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
6177 const struct GNUNET_MessageHeader *message)
6179 struct MeshClient *c;
6180 struct MeshTunnel *t;
6181 struct MeshPeerInfo *pi;
6182 struct GNUNET_MESH_Unicast *data_msg;
6183 MESH_TunnelNumber tid;
6186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6187 "Got a unicast request from a client!\n");
6189 /* Sanity check for client registration */
6190 if (NULL == (c = client_get (client)))
6193 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6196 data_msg = (struct GNUNET_MESH_Unicast *) message;
6197 /* Sanity check for message size */
6198 size = ntohs (message->size);
6199 if (sizeof (struct GNUNET_MESH_Unicast) +
6200 sizeof (struct GNUNET_MessageHeader) > size)
6203 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6207 /* Tunnel exists? */
6208 tid = ntohl (data_msg->tid);
6209 t = tunnel_get_by_local_id (c, tid);
6213 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6217 /* Is it a local tunnel? Then, does client own the tunnel? */
6218 if (t->owner->handle != client)
6221 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6225 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
6226 &data_msg->destination.hashPubKey);
6227 /* Is the selected peer in the tunnel? */
6231 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6235 /* Ok, everything is correct, send the message
6236 * (pretend we got it from a mesh peer)
6239 char buf[ntohs (message->size)] GNUNET_ALIGN;
6240 struct GNUNET_MESH_Unicast *copy;
6242 /* Work around const limitation */
6243 copy = (struct GNUNET_MESH_Unicast *) buf;
6244 memcpy (buf, data_msg, size);
6245 copy->oid = my_full_id;
6246 copy->tid = htonl (t->id.tid);
6247 copy->ttl = htonl (default_ttl);
6248 copy->pid = htonl (t->pid + 1);
6249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6250 " calling generic handler...\n");
6251 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
6252 send_client_tunnel_ack (t->owner, t);
6254 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6260 * Handler for client traffic directed to the origin
6262 * @param cls closure
6263 * @param client identification of the client
6264 * @param message the actual message
6267 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
6268 const struct GNUNET_MessageHeader *message)
6270 struct GNUNET_MESH_ToOrigin *data_msg;
6271 struct GNUNET_PeerIdentity id;
6272 struct MeshClient *c;
6273 struct MeshTunnel *t;
6274 MESH_TunnelNumber tid;
6277 /* Sanity check for client registration */
6278 if (NULL == (c = client_get (client)))
6281 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6284 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
6285 /* Sanity check for message size */
6286 size = ntohs (message->size);
6287 if (sizeof (struct GNUNET_MESH_ToOrigin) +
6288 sizeof (struct GNUNET_MessageHeader) > size)
6291 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6295 /* Tunnel exists? */
6296 tid = ntohl (data_msg->tid);
6297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6298 "Got a ToOrigin request from a client! Tunnel %X\n", tid);
6299 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6302 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6305 t = tunnel_get_by_local_id (c, tid);
6309 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6313 /* It should be sent by someone who has this as incoming tunnel. */
6314 if (-1 == client_knows_tunnel (c, t))
6317 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6320 GNUNET_PEER_resolve (t->id.oid, &id);
6322 /* Ok, everything is correct, send the message
6323 * (pretend we got it from a mesh peer)
6326 char buf[ntohs (message->size)] GNUNET_ALIGN;
6327 struct GNUNET_MESH_ToOrigin *copy;
6329 /* Work around const limitation */
6330 copy = (struct GNUNET_MESH_ToOrigin *) buf;
6331 memcpy (buf, data_msg, size);
6333 copy->tid = htonl (t->id.tid);
6334 copy->sender = my_full_id;
6335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6336 " calling generic handler...\n");
6337 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
6339 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6345 * Handler for client traffic directed to all peers in a tunnel
6347 * @param cls closure
6348 * @param client identification of the client
6349 * @param message the actual message
6352 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
6353 const struct GNUNET_MessageHeader *message)
6355 struct MeshClient *c;
6356 struct MeshTunnel *t;
6357 struct GNUNET_MESH_Multicast *data_msg;
6358 MESH_TunnelNumber tid;
6360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6361 "Got a multicast request from a client!\n");
6363 /* Sanity check for client registration */
6364 if (NULL == (c = client_get (client)))
6367 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6370 data_msg = (struct GNUNET_MESH_Multicast *) message;
6371 /* Sanity check for message size */
6372 if (sizeof (struct GNUNET_MESH_Multicast) +
6373 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
6376 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6380 /* Tunnel exists? */
6381 tid = ntohl (data_msg->tid);
6382 t = tunnel_get_by_local_id (c, tid);
6386 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6390 /* Does client own tunnel? */
6391 if (t->owner->handle != client)
6394 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6399 char buf[ntohs (message->size)] GNUNET_ALIGN;
6400 struct GNUNET_MESH_Multicast *copy;
6402 copy = (struct GNUNET_MESH_Multicast *) buf;
6403 memcpy (buf, message, ntohs (message->size));
6404 copy->oid = my_full_id;
6405 copy->tid = htonl (t->id.tid);
6406 copy->ttl = htonl (default_ttl);
6407 copy->pid = htonl (t->pid + 1);
6408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6409 " calling generic handler...\n");
6410 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
6413 /* receive done gets called when last copy is sent to a neighbor */
6419 * Functions to handle messages from clients
6421 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
6422 {&handle_local_new_client, NULL,
6423 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
6424 {&handle_local_announce_regex, NULL,
6425 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
6426 {&handle_local_tunnel_create, NULL,
6427 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
6428 sizeof (struct GNUNET_MESH_TunnelMessage)},
6429 {&handle_local_tunnel_destroy, NULL,
6430 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
6431 sizeof (struct GNUNET_MESH_TunnelMessage)},
6432 {&handle_local_tunnel_speed, NULL,
6433 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
6434 sizeof (struct GNUNET_MESH_TunnelMessage)},
6435 {&handle_local_tunnel_speed, NULL,
6436 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
6437 sizeof (struct GNUNET_MESH_TunnelMessage)},
6438 {&handle_local_tunnel_buffer, NULL,
6439 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
6440 sizeof (struct GNUNET_MESH_TunnelMessage)},
6441 {&handle_local_tunnel_buffer, NULL,
6442 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
6443 sizeof (struct GNUNET_MESH_TunnelMessage)},
6444 {&handle_local_connect_add, NULL,
6445 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
6446 sizeof (struct GNUNET_MESH_PeerControl)},
6447 {&handle_local_connect_del, NULL,
6448 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
6449 sizeof (struct GNUNET_MESH_PeerControl)},
6450 {&handle_local_blacklist, NULL,
6451 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
6452 sizeof (struct GNUNET_MESH_PeerControl)},
6453 {&handle_local_unblacklist, NULL,
6454 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
6455 sizeof (struct GNUNET_MESH_PeerControl)},
6456 {&handle_local_connect_by_type, NULL,
6457 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
6458 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
6459 {&handle_local_connect_by_string, NULL,
6460 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
6461 {&handle_local_unicast, NULL,
6462 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
6463 {&handle_local_to_origin, NULL,
6464 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
6465 {&handle_local_multicast, NULL,
6466 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
6472 * To be called on core init/fail.
6474 * @param cls service closure
6475 * @param server handle to the server for this service
6476 * @param identity the public identity of this peer
6479 core_init (void *cls, struct GNUNET_CORE_Handle *server,
6480 const struct GNUNET_PeerIdentity *identity)
6482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
6483 core_handle = server;
6484 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
6487 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
6488 GNUNET_SCHEDULER_shutdown ();
6495 * Method called whenever a given peer connects.
6497 * @param cls closure
6498 * @param peer peer identity this notification is about
6499 * @param atsi performance data for the connection
6500 * @param atsi_count number of records in 'atsi'
6503 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
6504 const struct GNUNET_ATS_Information *atsi,
6505 unsigned int atsi_count)
6507 struct MeshPeerInfo *peer_info;
6508 struct MeshPeerPath *path;
6510 DEBUG_CONN ("Peer connected\n");
6511 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
6512 peer_info = peer_info_get (peer);
6513 if (myid == peer_info->id)
6515 DEBUG_CONN (" (self)\n");
6520 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
6522 path = path_new (2);
6523 path->peers[0] = myid;
6524 path->peers[1] = peer_info->id;
6525 GNUNET_PEER_change_rc (myid, 1);
6526 GNUNET_PEER_change_rc (peer_info->id, 1);
6527 peer_info_add_path (peer_info, path, GNUNET_YES);
6528 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
6534 * Method called whenever a peer disconnects.
6536 * @param cls closure
6537 * @param peer peer identity this notification is about
6540 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
6542 struct MeshPeerInfo *pi;
6543 struct MeshPeerQueue *q;
6544 struct MeshPeerQueue *n;
6546 DEBUG_CONN ("Peer disconnected\n");
6547 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
6559 /* try to reroute this traffic instead */
6560 queue_destroy(q, GNUNET_YES);
6564 peer_info_remove_path (pi, pi->id, myid);
6567 DEBUG_CONN (" (self)\n");
6569 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
6574 /******************************************************************************/
6575 /************************ MAIN FUNCTIONS ****************************/
6576 /******************************************************************************/
6579 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
6581 * @param cls closure
6582 * @param key current key code
6583 * @param value value in the hash map
6584 * @return GNUNET_YES if we should continue to iterate,
6588 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
6590 struct MeshTunnel *t = value;
6597 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
6599 * @param cls closure
6600 * @param key current key code
6601 * @param value value in the hash map
6602 * @return GNUNET_YES if we should continue to iterate,
6606 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
6608 struct MeshPeerInfo *p = value;
6609 struct MeshPeerQueue *q;
6610 struct MeshPeerQueue *n;
6618 queue_destroy(q, GNUNET_YES);
6622 peer_info_destroy (p);
6627 * Task run during shutdown.
6633 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
6637 if (core_handle != NULL)
6639 GNUNET_CORE_disconnect (core_handle);
6642 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
6643 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
6644 if (dht_handle != NULL)
6646 GNUNET_DHT_disconnect (dht_handle);
6651 GNUNET_SERVER_notification_context_destroy (nc);
6654 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
6656 GNUNET_SCHEDULER_cancel (announce_id_task);
6657 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
6659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
6663 * Process mesh requests.
6665 * @param cls closure
6666 * @param server the initialized server
6667 * @param c configuration to use
6670 run (void *cls, struct GNUNET_SERVER_Handle *server,
6671 const struct GNUNET_CONFIGURATION_Handle *c)
6673 struct MeshPeerInfo *peer;
6674 struct MeshPeerPath *p;
6677 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
6678 server_handle = server;
6679 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
6680 NULL, /* Closure passed to MESH functions */
6681 &core_init, /* Call core_init once connected */
6682 &core_connect, /* Handle connects */
6683 &core_disconnect, /* remove peers on disconnects */
6684 NULL, /* Don't notify about all incoming messages */
6685 GNUNET_NO, /* For header only in notification */
6686 NULL, /* Don't notify about all outbound messages */
6687 GNUNET_NO, /* For header-only out notification */
6688 core_handlers); /* Register these handlers */
6690 if (core_handle == NULL)
6693 GNUNET_SCHEDULER_shutdown ();
6698 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
6701 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6703 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6705 GNUNET_SCHEDULER_shutdown ();
6710 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
6711 &refresh_path_time))
6713 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6715 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6716 "refresh path time");
6717 GNUNET_SCHEDULER_shutdown ();
6722 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
6723 &app_announce_time))
6725 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6727 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6728 "app announce time");
6729 GNUNET_SCHEDULER_shutdown ();
6734 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
6737 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6739 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6740 "id announce time");
6741 GNUNET_SCHEDULER_shutdown ();
6746 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
6747 &unacknowledged_wait_time))
6749 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6751 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6752 "unacknowledged wait time");
6753 GNUNET_SCHEDULER_shutdown ();
6758 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
6761 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6763 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6765 GNUNET_SCHEDULER_shutdown ();
6770 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
6773 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6775 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6777 GNUNET_SCHEDULER_shutdown ();
6782 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
6785 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6787 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
6789 GNUNET_SCHEDULER_shutdown ();
6794 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
6797 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6799 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
6805 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
6806 &dht_replication_level))
6808 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6810 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
6811 "dht replication level", 10);
6812 dht_replication_level = 10;
6816 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
6817 GNUNET_free (keyfile);
6818 if (my_private_key == NULL)
6820 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6821 _("Mesh service could not access hostkey. Exiting.\n"));
6822 GNUNET_SCHEDULER_shutdown ();
6825 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
6826 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
6827 &my_full_id.hashPubKey);
6828 myid = GNUNET_PEER_intern (&my_full_id);
6830 // transport_handle = GNUNET_TRANSPORT_connect(c,
6837 dht_handle = GNUNET_DHT_connect (c, 64);
6838 if (dht_handle == NULL)
6843 stats = GNUNET_STATISTICS_create ("mesh", c);
6847 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
6849 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6850 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6851 peers = GNUNET_CONTAINER_multihashmap_create (32);
6852 applications = GNUNET_CONTAINER_multihashmap_create (32);
6853 types = GNUNET_CONTAINER_multihashmap_create (32);
6855 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
6856 nc = GNUNET_SERVER_notification_context_create (server_handle,
6858 GNUNET_SERVER_disconnect_notify (server_handle,
6859 &handle_local_client_disconnect, NULL);
6863 clients_tail = NULL;
6866 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
6867 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
6869 /* Create a peer_info for the local peer */
6870 peer = peer_info_get (&my_full_id);
6873 GNUNET_PEER_change_rc (myid, 1);
6874 peer_info_add_path (peer, p, GNUNET_YES);
6876 /* Scheduled the task to clean up when shutdown is called */
6877 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
6880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "end of run()\n");
6884 * The main function for the mesh service.
6886 * @param argc number of arguments from the command line
6887 * @param argv command line arguments
6888 * @return 0 ok, 1 on error
6891 main (int argc, char *const *argv)
6895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
6898 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
6900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");