2 This file is part of GNUnet.
3 (C) 2001-2012 Christian Grothoff (and other contributing authors)
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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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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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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?
41 * - relay corking down to core
42 * - set ttl relative to tree depth
43 * - Add data ACK count in path ACK
44 * - Make common GNUNET_MESH_Data header for unicast, to_orig, multicast
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_NO
61 #define MESH_DEBUG_CONNECTION GNUNET_NO
62 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_YES
64 #if MESH_DEBUG_CONNECTION
65 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
67 #define DEBUG_CONN(...)
71 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
73 #define DEBUG_DHT(...)
80 struct timespec __mesh_start;
81 struct timespec __mesh_end;
82 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
83 #define INTERVAL_END \
85 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
86 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
87 if (__diff < 0) __diff += 1000000000;\
91 #define INTERVAL_SHOW \
93 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
95 #define INTERVAL_START
100 /******************************************************************************/
101 /************************ DATA STRUCTURES ****************************/
102 /******************************************************************************/
104 /** FWD declaration */
110 * Struct representing a piece of data being sent to other peers
114 /** Tunnel it belongs to. */
115 struct MeshTunnel *t;
117 /** How many remaining neighbors still hav't got it. */
118 unsigned int reference_counter;
120 /** How many remaining neighbors we need to send this to. */
121 unsigned int total_out;
123 /** Size of the data. */
132 * Struct containing info about a queued transmission to this peer
139 struct MeshPeerQueue *next;
144 struct MeshPeerQueue *prev;
147 * Peer this transmission is directed to.
149 struct MeshPeerInfo *peer;
152 * Tunnel this message belongs to.
154 struct MeshTunnel *tunnel;
157 * Pointer to info stucture used as cls.
167 * Size of the message
174 * Struct containing all info possibly needed to build a package when called
177 struct MeshTransmissionDescriptor
179 /** ID of the tunnel this packet travels in */
180 struct MESH_TunnelID *origin;
182 /** Who was this message being sent to */
183 struct MeshPeerInfo *peer;
185 /** Ultimate destination of the packet */
186 GNUNET_PEER_Id destination;
188 /** Data descriptor */
189 struct MeshData* mesh_data;
194 * Struct containing all information regarding a given peer
204 * Last time we heard from this peer
206 struct GNUNET_TIME_Absolute last_contact;
209 * Number of attempts to reconnect so far
211 int n_reconnect_attempts;
214 * Paths to reach the peer, ordered by ascending hop count
216 struct MeshPeerPath *path_head;
219 * Paths to reach the peer, ordered by ascending hop count
221 struct MeshPeerPath *path_tail;
224 * Handle to stop the DHT search for a path to this peer
226 struct GNUNET_DHT_GetHandle *dhtget;
229 * Closure given to the DHT GET
231 struct MeshPathInfo *dhtgetcls;
234 * Array of tunnels this peer participates in
235 * (most probably a small amount, therefore not a hashmap)
236 * When the path to the peer changes, notify these tunnels to let them
237 * re-adjust their path trees.
239 struct MeshTunnel **tunnels;
242 * Number of tunnels this peers participates in
244 unsigned int ntunnels;
247 * Transmission queue to core DLL head
249 struct MeshPeerQueue *queue_head;
252 * Transmission queue to core DLL tail
254 struct MeshPeerQueue *queue_tail;
257 * How many messages are in the queue to this peer.
259 unsigned int queue_n;
262 * Handle to for queued transmissions
264 struct GNUNET_CORE_TransmitHandle *core_transmit;
269 * Globally unique tunnel identification (owner + number)
270 * DO NOT USE OVER THE NETWORK
275 * Node that owns the tunnel
280 * Tunnel number to differentiate all the tunnels owned by the node oid
281 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
283 MESH_TunnelNumber tid;
288 * Struct containing all information regarding a tunnel
289 * For an intermediate node the improtant info used will be:
290 * - id Tunnel unique identification
291 * - paths[0] To know where to send it next
292 * - metainfo: ready, speeds, accounting
299 struct MESH_TunnelID id;
302 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
304 MESH_TunnelNumber local_tid;
307 * Local tunnel number for local destination clients (incoming number)
308 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
311 MESH_TunnelNumber local_tid_dest;
314 * Is the speed on the tunnel limited to the slowest peer?
319 * Is the tunnel bufferless (minimum latency)?
324 * Packet ID of the last fwd packet seen (sent/retransmitted/received).
329 * Packet ID of the last bck packet sent (unique counter per hop).
334 * SKIP value for this tunnel.
339 * MeshTunnelChildInfo of all children, indexed by GNUNET_PEER_Id.
340 * Contains the Flow Control info: FWD ACK value received,
341 * last BCK ACK sent, PID and SKIP values.
343 struct GNUNET_CONTAINER_MultiHashMap *children_fc;
346 * Last ACK sent towards the origin (for traffic towards leaf node).
348 uint32_t last_fwd_ack;
351 * BCK ACK value received from the hop towards the owner of the tunnel,
352 * (previous node / owner): up to what message PID can we sent back to him.
357 * How many messages are in the forward queue (towards leaves).
359 unsigned int fwd_queue_n;
362 * How many messages do we accept in the forward queue.
364 unsigned int fwd_queue_max;
367 * How many messages are in the backward queue (towards origin).
369 unsigned int bck_queue_n;
372 * How many messages do we accept in the backward queue.
374 unsigned int bck_queue_max;
377 * Last time the tunnel was used
379 struct GNUNET_TIME_Absolute timestamp;
382 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
383 * containing peers added by id or by type, not intermediate peers.
385 struct GNUNET_CONTAINER_MultiHashMap *peers;
388 * Number of peers that are connected and potentially ready to receive data
390 unsigned int peers_ready;
393 * Number of peers that have been added to the tunnel
395 unsigned int peers_total;
398 * Client owner of the tunnel, if any
400 struct MeshClient *owner;
403 * Clients that have been informed about and want to stay in the tunnel.
405 struct MeshClient **clients;
408 * Flow control info for each client.
410 struct MeshTunnelClientInfo *clients_fc;
413 * Number of elements in clients/clients_fc
415 unsigned int nclients;
418 * Clients that have been informed but requested to leave the tunnel.
420 struct MeshClient **ignore;
423 * Number of elements in clients
425 unsigned int nignore;
430 GNUNET_PEER_Id *blacklisted;
433 * Number of elements in blacklisted
435 unsigned int nblacklisted;
438 * Bloomfilter (for peer identities) to stop circular routes
440 char bloomfilter[MESH_BLOOM_SIZE];
445 struct MeshTunnelTree *tree;
448 * Application type we are looking for in this tunnel
450 GNUNET_MESH_ApplicationType type;
453 * Used to search peers offering a service
455 struct GNUNET_DHT_GetHandle *dht_get_type;
458 * Initial context of the regex search for a connect_by_string
460 struct MeshRegexSearchContext *regex_ctx;
463 * Task to keep the used paths alive
465 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
468 * Task to destroy the tunnel after timeout
470 * FIXME: merge the two? a tunnel will have either
471 * a path refresh OR a timeout, never both!
473 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
476 * Flag to signal the destruction of the tunnel.
477 * If this is set GNUNET_YES the tunnel will be destroyed
478 * when the queue is empty.
485 * Info about a child node in a tunnel, needed to perform flow control.
487 struct MeshTunnelChildInfo
490 * ID of the child node.
505 * Maximum PID allowed (FWD ACK received).
510 * Last ACK sent to that child (BCK ACK).
515 * Circular buffer pointing to MeshPeerQueue elements for all
516 * payload traffic going to this child.
517 * Size determined by the tunnel queue size (@c t->fwd_queue_max).
519 struct MeshPeerQueue **send_buffer;
522 * Index of the oldest element in the send_buffer.
524 unsigned int send_buffer_start;
527 * How many elements are already in the buffer.
529 unsigned int send_buffer_n;
534 * Info about a leaf client of a tunnel, needed to perform flow control.
536 struct MeshTunnelClientInfo
539 * PID of the last packet sent to the client (FWD).
544 * PID of the last packet received from the client (BCK).
549 * Maximum PID allowed (FWD ACK received).
554 * Last ACK sent to that child (BCK ACK).
562 * Info collected during iteration of child nodes in order to get the ACK value
565 struct MeshTunnelChildIteratorContext
568 * Tunnel whose info is being collected.
570 struct MeshTunnel *t;
573 * Is this context initialized? Is the value in max_child_ack valid?
578 * Maximum child ACK so far.
580 uint32_t max_child_ack;
583 * Number of children nodes
585 unsigned int nchildren;
590 * Info needed to work with tunnel paths and peers
597 struct MeshTunnel *t;
600 * Neighbouring peer to whom we send the packet to
602 struct MeshPeerInfo *peer;
607 struct MeshPeerPath *path;
612 * Struct containing information about a client of the service
619 struct MeshClient *next;
624 struct MeshClient *prev;
627 * Tunnels that belong to this client, indexed by local id
629 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
632 * Tunnels this client has accepted, indexed by incoming local id
634 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
637 * Tunnels this client has rejected, indexed by incoming local id
639 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
641 * Handle to communicate with the client
643 struct GNUNET_SERVER_Client *handle;
646 * Applications that this client has claimed to provide
648 struct GNUNET_CONTAINER_MultiHashMap *apps;
651 * Messages that this client has declared interest in
653 struct GNUNET_CONTAINER_MultiHashMap *types;
656 * Whether the client is active or shutting down (don't send confirmations
657 * to a client that is shutting down.
662 * ID of the client, mainly for debug messages
667 * Regular expressions describing the services offered by this client.
669 char **regexes; // FIXME add timeout? API to remove a regex?
672 * Number of regular expressions in regexes.
674 unsigned int n_regex;
677 * Task to refresh all regular expresions in the DHT.
679 GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
685 * Struct to keep information of searches of services described by a regex
686 * using a user-provided string service description.
688 struct MeshRegexSearchInfo
691 * Which tunnel is this for
693 struct MeshTunnel *t;
696 * User provided description of the searched service.
701 * Part of the description already consumed by the search.
708 struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
711 * Results from running DHT GETs.
713 struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
716 * Contexts, for each running DHT GET. Free all on end of search.
718 struct MeshRegexSearchContext **contexts;
721 * Number of contexts (branches/steps in search).
723 unsigned int n_contexts;
726 * Peer that is connecting via connect_by_string. When connected, free ctx.
731 * Other peers that are found but not yet being connected to.
733 GNUNET_PEER_Id *peers;
736 * Number of elements in peers.
738 unsigned int n_peers;
741 * Next peer to try to connect to.
746 * Timeout for a connect attempt.
747 * When reached, try to connect to a different peer, if any. If not,
748 * try the same peer again.
750 GNUNET_SCHEDULER_TaskIdentifier timeout;
755 * Struct to keep state of running searches that have consumed a part of
758 struct MeshRegexSearchContext
761 * Part of the description already consumed by
762 * this particular search branch.
767 * Information about the search.
769 struct MeshRegexSearchInfo *info;
772 * We just want to look for one edge, the longer the better.
775 unsigned int longest_match;
778 * Destination hash of the longest match.
780 struct GNUNET_HashCode hash;
783 /******************************************************************************/
784 /************************ DEBUG FUNCTIONS ****************************/
785 /******************************************************************************/
789 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
790 * @param cls string to print
791 * @param success GNUNET_OK if the PUT was transmitted,
792 * GNUNET_NO on timeout,
793 * GNUNET_SYSERR on disconnect from service
794 * after the PUT message was transmitted
795 * (so we don't know if it was received or not)
800 mesh_debug (void *cls, int success)
804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
808 unsigned int debug_fwd_ack;
809 unsigned int debug_bck_ack;
813 /******************************************************************************/
814 /*********************** GLOBAL VARIABLES ****************************/
815 /******************************************************************************/
818 * Configuration parameters
820 static struct GNUNET_TIME_Relative refresh_path_time;
821 static struct GNUNET_TIME_Relative app_announce_time;
822 static struct GNUNET_TIME_Relative id_announce_time;
823 static struct GNUNET_TIME_Relative unacknowledged_wait_time;
824 static struct GNUNET_TIME_Relative connect_timeout;
825 static long long unsigned int default_ttl;
826 static long long unsigned int dht_replication_level;
827 static long long unsigned int max_tunnels;
828 static long long unsigned int max_msgs_queue;
832 * Hostkey generation context
834 static struct GNUNET_CRYPTO_RsaKeyGenerationContext *keygen;
837 * DLL with all the clients, head.
839 static struct MeshClient *clients;
842 * DLL with all the clients, tail.
844 static struct MeshClient *clients_tail;
847 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
849 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
852 * Number of tunnels known.
854 static unsigned long long n_tunnels;
857 * Tunnels incoming, indexed by MESH_TunnelNumber
858 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
860 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
863 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
865 static struct GNUNET_CONTAINER_MultiHashMap *peers;
868 * Handle to communicate with transport
870 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
873 * Handle to communicate with core.
875 static struct GNUNET_CORE_Handle *core_handle;
880 static struct GNUNET_DHT_Handle *dht_handle;
885 static struct GNUNET_SERVER_Handle *server_handle;
888 * Handle to the statistics service.
890 static struct GNUNET_STATISTICS_Handle *stats;
893 * Notification context, to send messages to local clients.
895 static struct GNUNET_SERVER_NotificationContext *nc;
898 * Local peer own ID (memory efficient handle).
900 static GNUNET_PEER_Id myid;
903 * Local peer own ID (full value).
905 static struct GNUNET_PeerIdentity my_full_id;
910 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
915 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
918 * Tunnel ID for the next created tunnel (global tunnel number).
920 static MESH_TunnelNumber next_tid;
923 * Tunnel ID for the next incoming tunnel (local tunnel number).
925 static MESH_TunnelNumber next_local_tid;
928 * All application types provided by this peer.
930 static struct GNUNET_CONTAINER_MultiHashMap *applications;
933 * All message types clients of this peer are interested in.
935 static struct GNUNET_CONTAINER_MultiHashMap *types;
938 * Task to periodically announce provided applications.
940 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
943 * Task to periodically announce itself in the network.
945 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
948 * Next ID to assign to a client.
950 unsigned int next_client_id;
953 /******************************************************************************/
954 /*********************** DECLARATIONS **************************/
955 /******************************************************************************/
957 /* FIXME move declarations here */
960 * Function to process paths received for a new peer addition. The recorded
961 * paths form the initial tunnel, which can be optimized later.
962 * Called on each result obtained for the DHT search.
965 * @param exp when will this value expire
966 * @param key key of the result
967 * @param type type of the result
968 * @param size number of bytes in data
969 * @param data pointer to the result data
972 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
973 const struct GNUNET_HashCode * key,
974 const struct GNUNET_PeerIdentity *get_path,
975 unsigned int get_path_length,
976 const struct GNUNET_PeerIdentity *put_path,
977 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
978 size_t size, const void *data);
982 * Function to process DHT string to regex matching.
983 * Called on each result obtained for the DHT search.
985 * @param cls closure (search context)
986 * @param exp when will this value expire
987 * @param key key of the result
988 * @param get_path path of the get request (not used)
989 * @param get_path_length lenght of get_path (not used)
990 * @param put_path path of the put request (not used)
991 * @param put_path_length length of the put_path (not used)
992 * @param type type of the result
993 * @param size number of bytes in data
994 * @param data pointer to the result data
996 * TODO: re-issue the request after certain time? cancel after X results?
999 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1000 const struct GNUNET_HashCode * key,
1001 const struct GNUNET_PeerIdentity *get_path,
1002 unsigned int get_path_length,
1003 const struct GNUNET_PeerIdentity *put_path,
1004 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
1005 size_t size, const void *data);
1009 * Function to process DHT string to regex matching.
1010 * Called on each result obtained for the DHT search.
1012 * @param cls closure (search context)
1013 * @param exp when will this value expire
1014 * @param key key of the result
1015 * @param get_path path of the get request (not used)
1016 * @param get_path_length lenght of get_path (not used)
1017 * @param put_path path of the put request (not used)
1018 * @param put_path_length length of the put_path (not used)
1019 * @param type type of the result
1020 * @param size number of bytes in data
1021 * @param data pointer to the result data
1024 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1025 const struct GNUNET_HashCode * key,
1026 const struct GNUNET_PeerIdentity *get_path,
1027 unsigned int get_path_length,
1028 const struct GNUNET_PeerIdentity *put_path,
1029 unsigned int put_path_length,
1030 enum GNUNET_BLOCK_Type type,
1031 size_t size, const void *data);
1035 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1036 * and insert it in the appropiate structures if the peer is not known yet.
1038 * @param peer Short identity of the peer.
1040 * @return Existing or newly created peer info.
1042 static struct MeshPeerInfo *
1043 peer_info_get_short (const GNUNET_PEER_Id peer);
1047 * Try to establish a new connection to this peer.
1048 * Use the best path for the given tunnel.
1049 * If the peer doesn't have any path to it yet, try to get one.
1050 * If the peer already has some path, send a CREATE PATH towards it.
1052 * @param peer PeerInfo of the peer.
1053 * @param t Tunnel for which to create the path, if possible.
1056 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
1060 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1061 * needed rescources.
1062 * If peer already exists, reevaluate shortest path and change if different.
1064 * @param t Tunnel we want to add a new peer to
1065 * @param peer PeerInfo of the peer being added
1069 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
1073 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1074 * that are no longer needed, as well as nodes of no longer reachable peers.
1075 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1077 * @param t Tunnel from which to remove the path.
1078 * @param peer Short id of the peer which should be removed.
1081 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
1085 * Search for a tunnel by global ID using full PeerIdentities.
1087 * @param oid owner of the tunnel.
1088 * @param tid global tunnel number.
1090 * @return tunnel handler, NULL if doesn't exist.
1092 static struct MeshTunnel *
1093 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
1097 * Delete an active client from the tunnel.
1103 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
1106 * Notify a tunnel that a connection has broken that affects at least
1107 * some of its peers.
1109 * @param t Tunnel affected.
1110 * @param p1 Peer that got disconnected from p2.
1111 * @param p2 Peer that got disconnected from p1.
1113 * @return Short ID of the peer disconnected (either p1 or p2).
1114 * 0 if the tunnel remained unaffected.
1116 static GNUNET_PEER_Id
1117 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1122 * Get the current ack value for a tunnel, for data going from root to leaves,
1123 * taking in account the tunnel mode and the status of all children and clients.
1127 * @return Maximum PID allowed.
1130 tunnel_get_fwd_ack (struct MeshTunnel *t);
1134 * Add a client to a tunnel, initializing all needed data structures.
1136 * @param t Tunnel to which add the client.
1137 * @param c Client which to add to the tunnel.
1140 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c);
1144 * Jump to the next edge, with the longest matching token.
1146 * @param block Block found in the DHT.
1147 * @param size Size of the block.
1148 * @param ctx Context of the search.
1150 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1153 regex_next_edge (const struct MeshRegexBlock *block,
1155 struct MeshRegexSearchContext *ctx);
1159 * Find a path to a peer that offers a regex servcie compatible
1160 * with a given string.
1162 * @param key The key of the accepting state.
1163 * @param ctx Context containing info about the string, tunnel, etc.
1166 regex_find_path (const struct GNUNET_HashCode *key,
1167 struct MeshRegexSearchContext *ctx);
1171 * @brief Queue and pass message to core when possible.
1173 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
1174 * and accounts for it. In case the queue is full, the message is dropped and
1177 * Otherwise, message is treated as internal and allowed to go regardless of
1180 * @param cls Closure (@c type dependant). It will be used by queue_send to
1181 * build the message to be sent if not already prebuilt.
1182 * @param type Type of the message, 0 for a raw message.
1183 * @param size Size of the message.
1184 * @param dst Neighbor to send message to.
1185 * @param t Tunnel this message belongs to.
1188 queue_add (void *cls, uint16_t type, size_t size,
1189 struct MeshPeerInfo *dst, struct MeshTunnel *t);
1193 * Free a transmission that was already queued with all resources
1194 * associated to the request.
1196 * @param queue Queue handler to cancel.
1197 * @param clear_cls Is it necessary to free associated cls?
1200 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1204 * @brief Get the next transmittable message from the queue.
1206 * This will be the head, except in the case of being a data packet
1207 * not allowed by the destination peer.
1209 * @param peer Destination peer.
1211 * @return The next viable MeshPeerQueue element to send to that peer.
1212 * NULL when there are no transmittable messages.
1214 struct MeshPeerQueue *
1215 queue_get_next (const struct MeshPeerInfo *peer);
1219 * Core callback to write a queued packet to core buffer
1221 * @param cls Closure (peer info).
1222 * @param size Number of bytes available in buf.
1223 * @param buf Where the to write the message.
1225 * @return number of bytes written to buf
1228 queue_send (void *cls, size_t size, void *buf);
1230 /******************************************************************************/
1231 /************************ ITERATORS ****************************/
1232 /******************************************************************************/
1235 * Iterator over found existing mesh regex blocks that match an ongoing search.
1237 * @param cls closure
1238 * @param key current key code
1239 * @param value value in the hash map
1240 * @return GNUNET_YES if we should continue to iterate,
1244 regex_result_iterator (void *cls,
1245 const struct GNUNET_HashCode * key,
1248 struct MeshRegexBlock *block = value;
1249 struct MeshRegexSearchContext *ctx = cls;
1251 if (GNUNET_YES == ntohl(block->accepting) &&
1252 ctx->position == strlen (ctx->info->description))
1254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
1255 regex_find_path (key, ctx);
1256 return GNUNET_YES; // We found an accept state!
1260 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
1261 ctx->position, strlen(ctx->info->description),
1262 ntohl(block->accepting));
1265 regex_next_edge(block, SIZE_MAX, ctx);
1272 * Iterator over edges in a regex block retrieved from the DHT.
1274 * @param cls Closure (context of the search).
1275 * @param token Token that follows to next state.
1276 * @param len Lenght of token.
1277 * @param key Hash of next state.
1279 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1282 regex_edge_iterator (void *cls,
1285 const struct GNUNET_HashCode *key)
1287 struct MeshRegexSearchContext *ctx = cls;
1288 struct MeshRegexSearchInfo *info = ctx->info;
1292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
1293 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
1294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
1295 current = &info->description[ctx->position];
1296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
1297 current_len = strlen (info->description) - ctx->position;
1298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
1299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
1300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tk[0] : %c\n", token[0]);
1301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
1302 if (len > current_len)
1304 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
1305 return GNUNET_YES; // Token too long, wont match
1307 if (0 != strncmp (current, token, len))
1309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
1310 return GNUNET_YES; // Token doesn't match
1313 if (len > ctx->longest_match)
1315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token is longer, KEEP\n");
1316 ctx->longest_match = len;
1321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token is not longer, IGNORE\n");
1324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
1330 * Jump to the next edge, with the longest matching token.
1332 * @param block Block found in the DHT.
1333 * @param size Size of the block.
1334 * @param ctx Context of the search.
1336 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1339 regex_next_edge (const struct MeshRegexBlock *block,
1341 struct MeshRegexSearchContext *ctx)
1343 struct MeshRegexSearchContext *new_ctx;
1344 struct MeshRegexSearchInfo *info = ctx->info;
1345 struct GNUNET_DHT_GetHandle *get_h;
1349 /* Find the longest match for the current string position,
1350 * among tokens in the given block */
1351 ctx->longest_match = 0;
1352 result = GNUNET_MESH_regex_block_iterate (block, size,
1353 ®ex_edge_iterator, ctx);
1354 GNUNET_break (GNUNET_OK == result || SIZE_MAX == size);
1356 /* Did anything match? */
1357 if (0 == ctx->longest_match)
1360 new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
1361 new_ctx->info = info;
1362 new_ctx->position = ctx->position + ctx->longest_match;
1363 GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
1365 /* Check whether we already have a DHT GET running for it */
1367 GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, &ctx->hash))
1369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
1370 GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results,
1372 ®ex_result_iterator,
1374 return; // We are already looking for it
1377 /* Start search in DHT */
1379 GNUNET_DHT_get_start (dht_handle, /* handle */
1380 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
1381 &ctx->hash, /* key to search */
1382 dht_replication_level, /* replication level */
1383 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1384 NULL, /* xquery */ // FIXME BLOOMFILTER
1385 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1386 &dht_get_string_handler, new_ctx);
1388 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
1391 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1400 * Iterator over hash map entries to cancel DHT GET requests after a
1401 * successful connect_by_string.
1403 * @param cls Closure (unused).
1404 * @param key Current key code (unused).
1405 * @param value Value in the hash map (get handle).
1406 * @return GNUNET_YES if we should continue to iterate,
1410 regex_cancel_dht_get (void *cls,
1411 const struct GNUNET_HashCode * key,
1414 struct GNUNET_DHT_GetHandle *h = value;
1416 GNUNET_DHT_get_stop (h);
1422 * Iterator over hash map entries to free MeshRegexBlocks stored during the
1423 * search for connect_by_string.
1425 * @param cls Closure (unused).
1426 * @param key Current key code (unused).
1427 * @param value MeshRegexBlock in the hash map.
1428 * @return GNUNET_YES if we should continue to iterate,
1432 regex_free_result (void *cls,
1433 const struct GNUNET_HashCode * key,
1437 GNUNET_free (value);
1443 * Regex callback iterator to store own service description in the DHT.
1445 * @param cls closure.
1446 * @param key hash for current state.
1447 * @param proof proof for current state.
1448 * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
1449 * @param num_edges number of edges leaving current state.
1450 * @param edges edges leaving current state.
1453 regex_iterator (void *cls,
1454 const struct GNUNET_HashCode *key,
1457 unsigned int num_edges,
1458 const struct GNUNET_REGEX_Edge *edges)
1460 struct MeshRegexBlock *block;
1461 struct MeshRegexEdge *block_edge;
1462 enum GNUNET_DHT_RouteOption opt;
1466 unsigned int offset;
1469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1470 " regex dht put for state %s\n",
1472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1479 opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
1480 if (GNUNET_YES == accepting)
1482 struct MeshRegexAccept block;
1484 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1485 " state %s is accepting, putting own id\n",
1487 size = sizeof (block);
1489 block.id = my_full_id;
1491 GNUNET_DHT_put(dht_handle, key,
1492 dht_replication_level,
1493 opt | GNUNET_DHT_RO_RECORD_ROUTE,
1494 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
1497 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1502 len = strlen(proof);
1503 size = sizeof (struct MeshRegexBlock) + len;
1504 block = GNUNET_malloc (size);
1507 block->n_proof = htonl (len);
1508 block->n_edges = htonl (num_edges);
1509 block->accepting = htonl (accepting);
1511 /* Store the proof at the end of the block. */
1512 aux = (char *) &block[1];
1513 memcpy (aux, proof, len);
1516 /* Store each edge in a variable length MeshEdge struct at the
1517 * very end of the MeshRegexBlock structure.
1519 for (i = 0; i < num_edges; i++)
1521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1522 " edge %s towards %s\n",
1524 GNUNET_h2s(&edges[i].destination));
1526 /* aux points at the end of the last block */
1527 len = strlen (edges[i].label);
1528 size += sizeof (struct MeshRegexEdge) + len;
1529 // Calculate offset FIXME is this ok? use size instead?
1530 offset = aux - (char *) block;
1531 block = GNUNET_realloc (block, size);
1532 aux = &((char *) block)[offset];
1533 block_edge = (struct MeshRegexEdge *) aux;
1534 block_edge->key = edges[i].destination;
1535 block_edge->n_token = htonl (len);
1536 aux = (char *) &block_edge[1];
1537 memcpy (aux, edges[i].label, len);
1541 GNUNET_DHT_put(dht_handle, key,
1542 dht_replication_level,
1544 GNUNET_BLOCK_TYPE_MESH_REGEX, size,
1546 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1550 GNUNET_free (block);
1555 * Store the regular expression describing a local service into the DHT.
1557 * @param regex The regular expresion.
1560 regex_put (const char *regex)
1562 struct GNUNET_REGEX_Automaton *dfa;
1564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) start\n", regex);
1565 dfa = GNUNET_REGEX_construct_dfa (regex, strlen(regex));
1566 GNUNET_REGEX_iterate_all_edges (dfa, ®ex_iterator, NULL);
1567 GNUNET_REGEX_automaton_destroy (dfa);
1568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) end\n", regex);
1573 * Find a path to a peer that offers a regex servcie compatible
1574 * with a given string.
1576 * @param key The key of the accepting state.
1577 * @param ctx Context containing info about the string, tunnel, etc.
1580 regex_find_path (const struct GNUNET_HashCode *key,
1581 struct MeshRegexSearchContext *ctx)
1583 struct GNUNET_DHT_GetHandle *get_h;
1585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
1586 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
1587 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
1588 key, /* key to search */
1589 dht_replication_level, /* replication level */
1590 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE |
1591 GNUNET_DHT_RO_RECORD_ROUTE,
1592 NULL, /* xquery */ // FIXME BLOOMFILTER
1593 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1594 &dht_get_string_accept_handler, ctx);
1595 GNUNET_break (GNUNET_OK ==
1596 GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
1599 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1604 * Function called if the connect attempt to a peer found via
1605 * connect_by_string times out. Try to connect to another peer, if any.
1606 * Otherwise try to reconnect to the same peer.
1608 * @param cls Closure (info about regex search).
1609 * @param tc TaskContext.
1612 regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1614 struct MeshRegexSearchInfo *info = cls;
1615 struct MeshPeerInfo *peer_info;
1619 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
1620 info->timeout = GNUNET_SCHEDULER_NO_TASK;
1621 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1627 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
1629 if (0 < info->n_peers)
1631 // Select next peer, put current in that spot.
1632 id = info->peers[info->i_peer];
1633 info->peers[info->i_peer] = info->peer;
1634 info->i_peer = (info->i_peer + 1) % info->n_peers;
1638 // Try to connect to same peer again.
1641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
1643 peer_info = peer_info_get_short(id);
1644 tunnel_add_peer (info->t, peer_info);
1646 tunnel_delete_peer (info->t, old);
1647 peer_info_connect (peer_info, info->t);
1648 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
1649 ®ex_connect_timeout,
1651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
1656 * Cancel an ongoing regex search in the DHT and free all resources.
1658 * @param ctx The search context.
1661 regex_cancel_search(struct MeshRegexSearchContext *ctx)
1663 struct MeshRegexSearchInfo *info = ctx->info;
1666 GNUNET_free (info->description);
1667 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
1668 ®ex_cancel_dht_get, NULL);
1669 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
1670 ®ex_free_result, NULL);
1671 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
1672 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
1673 info->t->regex_ctx = NULL;
1674 for (i = 0; i < info->n_contexts; i++)
1676 GNUNET_free (info->contexts[i]);
1678 if (0 < info->n_contexts)
1679 GNUNET_free (info->contexts);
1680 if (0 < info->n_peers)
1681 GNUNET_free (info->peers);
1682 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
1684 GNUNET_SCHEDULER_cancel(info->timeout);
1690 /******************************************************************************/
1691 /************************ PERIODIC FUNCTIONS ****************************/
1692 /******************************************************************************/
1695 * Announce iterator over for each application provided by the peer
1697 * @param cls closure
1698 * @param key current key code
1699 * @param value value in the hash map
1700 * @return GNUNET_YES if we should continue to
1705 announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
1707 struct PBlock block;
1708 struct MeshClient *c;
1710 block.id = my_full_id;
1711 c = GNUNET_CONTAINER_multihashmap_get (applications, key);
1712 GNUNET_assert(NULL != c);
1713 block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
1714 if (0 == block.type)
1719 block.type = htonl (block.type);
1721 GNUNET_break (NULL !=
1722 GNUNET_DHT_put (dht_handle, key,
1723 dht_replication_level,
1724 GNUNET_DHT_RO_RECORD_ROUTE |
1725 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1726 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
1728 (const char *) &block,
1729 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1731 app_announce_time, NULL, NULL));
1737 * Periodically announce what applications are provided by local clients
1740 * @param cls closure
1741 * @param tc task context
1744 announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1746 struct MeshClient *c = cls;
1749 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1751 c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
1755 DEBUG_DHT ("Starting PUT for regex\n");
1757 for (i = 0; i < c->n_regex; i++)
1759 regex_put (c->regexes[i]);
1761 c->regex_announce_task =
1762 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_regex, cls);
1763 DEBUG_DHT ("Finished PUT for regex\n");
1770 * Periodically announce what applications are provided by local clients
1773 * @param cls closure
1774 * @param tc task context
1777 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1779 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1781 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
1785 DEBUG_DHT ("Starting PUT for apps\n");
1787 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
1789 announce_applications_task =
1790 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
1792 DEBUG_DHT ("Finished PUT for apps\n");
1799 * Periodically announce self id in the DHT
1801 * @param cls closure
1802 * @param tc task context
1805 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1807 struct PBlock block;
1809 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1811 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1815 * - Set data expiration in function of X
1816 * - Adapt X to churn
1818 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1820 block.id = my_full_id;
1821 block.type = htonl (0);
1822 GNUNET_DHT_put (dht_handle, /* DHT handle */
1823 &my_full_id.hashPubKey, /* Key to use */
1824 dht_replication_level, /* Replication level */
1825 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1826 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1827 sizeof (block), /* Size of the data */
1828 (const char *) &block, /* Data itself */
1829 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1830 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1831 NULL, /* Continuation */
1832 NULL); /* Continuation closure */
1834 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1838 /******************************************************************************/
1839 /****************** GENERAL HELPER FUNCTIONS ************************/
1840 /******************************************************************************/
1843 * Decrements the reference counter and frees all resources if needed
1845 * @param mesh_data Data Descriptor used in a multicast message.
1846 * Freed no longer needed (last message).
1849 data_descriptor_decrement_rc (struct MeshData *mesh_data)
1851 if (0 == --(mesh_data->reference_counter))
1853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1854 GNUNET_free (mesh_data->data);
1855 GNUNET_free (mesh_data);
1861 * Check if client has registered with the service and has not disconnected
1863 * @param client the client to check
1865 * @return non-NULL if client exists in the global DLL
1867 static struct MeshClient *
1868 client_get (struct GNUNET_SERVER_Client *client)
1870 struct MeshClient *c;
1875 if (c->handle == client)
1884 * Checks if a given client has subscribed to certain message type
1886 * @param message_type Type of message to check
1887 * @param c Client to check
1889 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1891 * FIXME: use of crypto_hash slows it down
1892 * The hash function alone takes 8-10us out of the ~55us for the whole
1893 * process of retransmitting the message from one local client to another.
1894 * Find faster implementation!
1897 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1899 struct GNUNET_HashCode hc;
1901 if (NULL == c->types)
1904 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1905 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1910 * Check whether client wants traffic from a tunnel.
1912 * @param c Client to check.
1913 * @param t Tunnel to be found.
1915 * @return GNUNET_YES if client knows tunnel.
1917 * TODO look in client hashmap
1920 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1924 for (i = 0; i < t->nclients; i++)
1925 if (t->clients[i] == c)
1932 * Check whether client has been informed about a tunnel.
1934 * @param c Client to check.
1935 * @param t Tunnel to be found.
1937 * @return GNUNET_YES if client knows tunnel.
1939 * TODO look in client hashmap
1942 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1946 for (i = 0; i < t->nignore; i++)
1947 if (t->ignore[i] == c)
1949 return client_wants_tunnel(c, t);
1954 * Marks a client as uninterested in traffic from the tunnel, updating both
1955 * client and tunnel to reflect this.
1957 * @param c Client that doesn't want traffic anymore.
1958 * @param t Tunnel which should be ignored.
1960 * FIXME when to delete an incoming tunnel?
1963 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1965 struct GNUNET_HashCode hash;
1967 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1968 GNUNET_break (GNUNET_YES ==
1969 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1971 GNUNET_break (GNUNET_YES ==
1972 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
1973 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1974 tunnel_delete_active_client (t, c);
1975 GNUNET_array_append (t->ignore, t->nignore, c);
1980 * Deletes a tunnel from a client (either owner or destination). To be used on
1981 * tunnel destroy, otherwise, use client_ignore_tunnel.
1983 * @param c Client whose tunnel to delete.
1984 * @param t Tunnel which should be deleted.
1987 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1989 struct GNUNET_HashCode hash;
1993 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1994 GNUNET_assert (GNUNET_YES ==
1995 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
2001 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2003 GNUNET_assert (GNUNET_YES ==
2004 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
2008 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
2016 * Send the message to all clients that have subscribed to its type
2018 * @param msg Pointer to the message itself
2019 * @param payload Pointer to the payload of the message.
2020 * @param t The tunnel to whose clients this message goes.
2022 * @return number of clients this message was sent to
2025 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
2026 const struct GNUNET_MessageHeader *payload,
2027 struct MeshTunnel *t)
2029 struct MeshClient *c;
2030 MESH_TunnelNumber *tid;
2033 char cbuf[htons (msg->size)];
2035 type = ntohs (payload->type);
2036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
2037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %s\n",
2038 GNUNET_MESH_DEBUG_M2S (type));
2040 memcpy (cbuf, msg, sizeof (cbuf));
2041 switch (htons (msg->type))
2043 struct GNUNET_MESH_Unicast *uc;
2044 struct GNUNET_MESH_Multicast *mc;
2045 struct GNUNET_MESH_ToOrigin *to;
2047 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2048 uc = (struct GNUNET_MESH_Unicast *) cbuf;
2051 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
2052 mc = (struct GNUNET_MESH_Multicast *) cbuf;
2055 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2056 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
2064 for (count = 0, c = clients; c != NULL; c = c->next)
2066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
2067 if (client_is_subscribed (type, c))
2069 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
2073 *tid = htonl (t->local_tid);
2077 if (GNUNET_NO == client_knows_tunnel (c, t))
2079 /* This client doesn't know the tunnel */
2080 struct GNUNET_MESH_TunnelNotification tmsg;
2081 struct GNUNET_HashCode hash;
2083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
2084 tmsg.header.size = htons (sizeof (tmsg));
2085 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2086 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
2087 tmsg.tunnel_id = htonl (t->local_tid_dest);
2088 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2089 &tmsg.header, GNUNET_NO);
2090 tunnel_add_client (t, c);
2091 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2093 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2094 c->incoming_tunnels, &hash, t,
2095 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2097 *tid = htonl (t->local_tid_dest);
2100 /* Check if the client wants to get traffic from the tunnel */
2101 if (GNUNET_NO == client_wants_tunnel(c, t))
2104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
2105 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2106 (struct GNUNET_MessageHeader
2107 *) cbuf, GNUNET_NO);
2116 * Notify the client that owns the tunnel that a peer has connected to it
2117 * (the requested path to it has been confirmed).
2119 * @param t Tunnel whose owner to notify
2120 * @param id Short id of the peer that has connected
2123 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
2125 struct GNUNET_MESH_PeerControl pc;
2127 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2128 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2129 pc.tunnel_id = htonl (t->local_tid);
2130 GNUNET_PEER_resolve (id, &pc.peer);
2131 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
2137 * Notify all clients (not depending on registration status) that the incoming
2138 * tunnel is no longer valid.
2140 * @param t Tunnel that was destroyed.
2143 send_clients_tunnel_destroy (struct MeshTunnel *t)
2145 struct GNUNET_MESH_TunnelMessage msg;
2147 msg.header.size = htons (sizeof (msg));
2148 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2149 msg.tunnel_id = htonl (t->local_tid_dest);
2150 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
2155 * Notify clients of tunnel disconnections, if needed.
2156 * In case the origin disconnects, the destination clients get a tunnel destroy
2157 * notification. If the last destination disconnects (only one remaining client
2158 * in tunnel), the origin gets a (local ID) peer disconnected.
2159 * Note that the function must be called BEFORE removing the client from
2162 * @param t Tunnel that was destroyed.
2163 * @param c Client that disconnected.
2166 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2172 struct GNUNET_MESH_TunnelMessage msg;
2174 msg.header.size = htons (sizeof (msg));
2175 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2176 msg.tunnel_id = htonl (t->local_tid_dest);
2177 for (i = 0; i < t->nclients; i++)
2178 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2179 &msg.header, GNUNET_NO);
2181 // FIXME when to disconnect an incoming tunnel?
2182 else if (1 == t->nclients && NULL != t->owner)
2184 struct GNUNET_MESH_PeerControl msg;
2186 msg.header.size = htons (sizeof (msg));
2187 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2188 msg.tunnel_id = htonl (t->local_tid);
2189 msg.peer = my_full_id;
2190 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2191 &msg.header, GNUNET_NO);
2197 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2198 * and insert it in the appropiate structures if the peer is not known yet.
2200 * @param peer Full identity of the peer.
2202 * @return Existing or newly created peer info.
2204 static struct MeshPeerInfo *
2205 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2207 struct MeshPeerInfo *peer_info;
2209 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2210 if (NULL == peer_info)
2213 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2214 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2215 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2216 peer_info->id = GNUNET_PEER_intern (peer);
2224 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2225 * and insert it in the appropiate structures if the peer is not known yet.
2227 * @param peer Short identity of the peer.
2229 * @return Existing or newly created peer info.
2231 static struct MeshPeerInfo *
2232 peer_info_get_short (const GNUNET_PEER_Id peer)
2234 struct GNUNET_PeerIdentity id;
2236 GNUNET_PEER_resolve (peer, &id);
2237 return peer_info_get (&id);
2242 * Iterator to remove the tunnel from the list of tunnels a peer participates
2245 * @param cls Closure (tunnel info)
2246 * @param key GNUNET_PeerIdentity of the peer (unused)
2247 * @param value PeerInfo of the peer
2249 * @return always GNUNET_YES, to keep iterating
2252 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2254 struct MeshTunnel *t = cls;
2255 struct MeshPeerInfo *peer = value;
2258 for (i = 0; i < peer->ntunnels; i++)
2261 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2264 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2265 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2274 * Core callback to write a pre-constructed data packet to core buffer
2276 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2277 * @param size Number of bytes available in buf.
2278 * @param buf Where the to write the message.
2280 * @return number of bytes written to buf
2283 send_core_data_raw (void *cls, size_t size, void *buf)
2285 struct MeshTransmissionDescriptor *info = cls;
2286 struct GNUNET_MessageHeader *msg;
2289 GNUNET_assert (NULL != info);
2290 GNUNET_assert (NULL != info->mesh_data);
2291 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2292 total_size = ntohs (msg->size);
2294 if (total_size > size)
2299 memcpy (buf, msg, total_size);
2300 data_descriptor_decrement_rc (info->mesh_data);
2307 * Sends an already built non-multicast message to a peer,
2308 * properly registrating all used resources.
2310 * @param message Message to send. Function makes a copy of it.
2311 * @param peer Short ID of the neighbor whom to send the message.
2312 * @param t Tunnel on which this message is transmitted.
2315 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
2316 const struct GNUNET_PeerIdentity *peer,
2317 struct MeshTunnel *t)
2319 struct MeshTransmissionDescriptor *info;
2320 struct MeshPeerInfo *neighbor;
2321 struct MeshPeerPath *p;
2325 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2327 size = ntohs (message->size);
2328 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2329 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2330 info->mesh_data->data = GNUNET_malloc (size);
2331 memcpy (info->mesh_data->data, message, size);
2332 type = ntohs(message->type);
2333 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2335 struct GNUNET_MESH_Unicast *m;
2337 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2338 m->ttl = htonl (ntohl (m->ttl) - 1);
2340 info->mesh_data->data_len = size;
2341 info->mesh_data->reference_counter = 1;
2342 info->mesh_data->total_out = 1;
2343 neighbor = peer_info_get (peer);
2344 for (p = neighbor->path_head; NULL != p; p = p->next)
2354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2355 " %s IS NOT DIRECTLY CONNECTED\n",
2357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2360 for (p = neighbor->path_head; NULL != p; p = p->next)
2362 struct GNUNET_PeerIdentity debug_id;
2365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2366 " path with %u hops through:\n",
2368 for (i = 0; i < p->length; i++)
2370 GNUNET_PEER_resolve(p->peers[i], &debug_id);
2371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2373 i, GNUNET_i2s(&debug_id));
2377 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2378 GNUNET_free (info->mesh_data->data);
2379 GNUNET_free (info->mesh_data);
2383 info->peer = neighbor;
2384 GNUNET_assert (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK != type);
2394 * Sends a CREATE PATH message for a path to a peer, properly registrating
2395 * all used resources.
2397 * @param peer PeerInfo of the final peer for whom this path is being created.
2398 * @param p Path itself.
2399 * @param t Tunnel for which the path is created.
2402 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2403 struct MeshTunnel *t)
2405 struct GNUNET_PeerIdentity id;
2406 struct MeshPathInfo *path_info;
2407 struct MeshPeerInfo *neighbor;
2413 p = tree_get_path_to_peer (t->tree, peer->id);
2420 for (i = 0; i < p->length; i++)
2422 if (p->peers[i] == myid)
2425 if (i >= p->length - 1)
2431 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2433 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2434 path_info->path = p;
2436 neighbor = peer_info_get (&id);
2437 path_info->peer = neighbor;
2438 queue_add (path_info,
2439 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2440 sizeof (struct GNUNET_MESH_ManipulatePath) +
2441 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2448 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2450 * @param t Tunnel whose path to destroy.
2451 * @param destination Short ID of the peer to whom the path to destroy.
2454 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2456 struct MeshPeerPath *p;
2459 p = tree_get_path_to_peer (t->tree, destination);
2465 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2466 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2468 struct GNUNET_MESH_ManipulatePath *msg;
2469 struct GNUNET_PeerIdentity *pi;
2473 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2474 msg->header.size = htons (size);
2475 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2476 msg->tid = htonl (t->id.tid);
2477 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2478 for (i = 0; i < p->length; i++)
2480 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2482 send_prebuilt_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2489 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
2491 * @param t Tunnel which to confirm.
2494 send_path_ack (struct MeshTunnel *t)
2496 struct MeshTransmissionDescriptor *info;
2497 struct GNUNET_PeerIdentity id;
2498 GNUNET_PEER_Id peer;
2500 peer = tree_get_predecessor (t->tree);
2501 GNUNET_PEER_resolve (peer, &id);
2502 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2503 info->origin = &t->id;
2504 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
2505 GNUNET_assert (NULL != info->peer);
2508 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2509 sizeof (struct GNUNET_MESH_PathACK),
2516 * Try to establish a new connection to this peer.
2517 * Use the best path for the given tunnel.
2518 * If the peer doesn't have any path to it yet, try to get one.
2519 * If the peer already has some path, send a CREATE PATH towards it.
2521 * @param peer PeerInfo of the peer.
2522 * @param t Tunnel for which to create the path, if possible.
2525 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2527 struct MeshPeerPath *p;
2528 struct MeshPathInfo *path_info;
2530 if (NULL != peer->path_head)
2532 p = tree_get_path_to_peer (t->tree, peer->id);
2539 // FIXME always send create path to self
2542 send_create_path (peer, p, t);
2546 struct GNUNET_HashCode hash;
2549 send_client_peer_connected (t, myid);
2550 t->local_tid_dest = next_local_tid++;
2551 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2554 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2555 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2562 else if (NULL == peer->dhtget)
2564 struct GNUNET_PeerIdentity id;
2566 GNUNET_PEER_resolve (peer->id, &id);
2567 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2568 path_info->peer = peer;
2570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2571 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2572 peer->dhtgetcls = path_info;
2573 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2574 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2575 &id.hashPubKey, /* key to search */
2576 dht_replication_level, /* replication level */
2577 GNUNET_DHT_RO_RECORD_ROUTE |
2578 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2579 NULL, /* xquery */ // FIXME BLOOMFILTER
2580 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2581 &dht_get_id_handler, path_info);
2583 /* Otherwise, there is no path but the DHT get is already started. */
2588 * Task to delay the connection of a peer
2590 * @param cls Closure (path info with tunnel and peer to connect).
2591 * Will be free'd on exection.
2592 * @param tc TaskContext
2595 peer_info_connect_task (void *cls,
2596 const struct GNUNET_SCHEDULER_TaskContext *tc)
2598 struct MeshPathInfo *path_info = cls;
2600 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2605 peer_info_connect (path_info->peer, path_info->t);
2611 * Destroy the peer_info and free any allocated resources linked to it
2613 * @param pi The peer_info to destroy.
2615 * @return GNUNET_OK on success
2618 peer_info_destroy (struct MeshPeerInfo *pi)
2620 struct GNUNET_PeerIdentity id;
2621 struct MeshPeerPath *p;
2622 struct MeshPeerPath *nextp;
2624 GNUNET_PEER_resolve (pi->id, &id);
2625 GNUNET_PEER_change_rc (pi->id, -1);
2628 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2631 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2632 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2634 if (NULL != pi->dhtget)
2636 GNUNET_DHT_get_stop (pi->dhtget);
2637 GNUNET_free (pi->dhtgetcls);
2643 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2653 * Remove all paths that rely on a direct connection between p1 and p2
2654 * from the peer itself and notify all tunnels about it.
2656 * @param peer PeerInfo of affected peer.
2657 * @param p1 GNUNET_PEER_Id of one peer.
2658 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2661 * TODO: optimize (see below)
2664 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2667 struct MeshPeerPath *p;
2668 struct MeshPeerPath *aux;
2669 struct MeshPeerInfo *peer_d;
2671 unsigned int destroyed;
2676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2678 p = peer->path_head;
2682 for (i = 0; i < (p->length - 1); i++)
2684 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2685 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2687 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2698 for (i = 0; i < peer->ntunnels; i++)
2700 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2704 * Problem: one or more peers have been deleted from the tunnel tree.
2705 * We don't know who they are to try to add them again.
2706 * We need to try to find a new path for each of the disconnected peers.
2707 * Some of them might already have a path to reach them that does not
2708 * involve p1 and p2. Adding all anew might render in a better tree than
2709 * the trivial immediate fix.
2711 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2712 * its children will be reachable trough him.
2714 peer_d = peer_info_get_short (d);
2717 for (p = peer_d->path_head; NULL != p; p = p->next)
2719 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2727 /* No callback, as peer will be already disconnected and a connection
2728 * scheduled by tunnel_notify_connection_broken.
2730 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2734 peer_info_connect (peer_d, peer->tunnels[i]);
2737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2742 * Add the path to the peer and update the path used to reach it in case this
2745 * @param peer_info Destination peer to add the path to.
2746 * @param path New path to add. Last peer must be the peer in arg 1.
2747 * Path will be either used of freed if already known.
2748 * @param trusted Do we trust that this path is real?
2751 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2754 struct MeshPeerPath *aux;
2758 if ((NULL == peer_info) || (NULL == path))
2761 path_destroy (path);
2764 if (path->peers[path->length - 1] != peer_info->id)
2767 path_destroy (path);
2770 if (path->length <= 2 && GNUNET_NO == trusted)
2772 /* Only allow CORE to tell us about direct paths */
2773 path_destroy (path);
2776 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2777 for (l = 1; l < path->length; l++)
2779 if (path->peers[l] == myid)
2781 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2782 for (l2 = 0; l2 < path->length - l; l2++)
2784 path->peers[l2] = path->peers[l + l2];
2789 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2794 struct GNUNET_PeerIdentity id;
2796 GNUNET_PEER_resolve (peer_info->id, &id);
2797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2798 path->length, GNUNET_i2s (&id));
2801 l = path_get_length (path);
2808 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2809 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2811 l2 = path_get_length (aux);
2814 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2815 peer_info->path_tail, aux, path);
2820 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2822 path_destroy (path);
2827 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2834 * Add the path to the origin peer and update the path used to reach it in case
2835 * this is the shortest.
2836 * The path is given in peer_info -> destination, therefore we turn the path
2837 * upside down first.
2839 * @param peer_info Peer to add the path to, being the origin of the path.
2840 * @param path New path to add after being inversed.
2841 * @param trusted Do we trust that this path is real?
2844 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2845 struct MeshPeerPath *path, int trusted)
2848 peer_info_add_path (peer_info, path, trusted);
2853 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2854 * to obtain a local peer -> destination path and interning the peer ids.
2856 * @return Newly allocated and created path
2858 static struct MeshPeerPath *
2859 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2860 unsigned int get_path_length,
2861 const struct GNUNET_PeerIdentity *put_path,
2862 unsigned int put_path_length)
2864 struct MeshPeerPath *p;
2870 GNUNET_PEER_change_rc (myid, 1);
2871 i = get_path_length;
2872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2873 for (i--; i >= 0; i--)
2875 id = GNUNET_PEER_intern (&get_path[i]);
2876 if (p->length > 0 && id == p->peers[p->length - 1])
2878 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2879 GNUNET_PEER_change_rc (id, -1);
2883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2884 GNUNET_i2s (&get_path[i]));
2886 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2887 p->peers[p->length - 1] = id;
2890 i = put_path_length;
2891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2892 for (i--; i >= 0; i--)
2894 id = GNUNET_PEER_intern (&put_path[i]);
2897 /* PUT path went through us, so discard the path up until now and start
2898 * from here to get a much shorter (and loop-free) path.
2903 if (p->length > 0 && id == p->peers[p->length - 1])
2905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2906 GNUNET_PEER_change_rc (id, -1);
2910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2911 GNUNET_i2s (&put_path[i]));
2913 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2914 p->peers[p->length - 1] = id;
2918 if (get_path_length > 0)
2919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2920 GNUNET_i2s (&get_path[0]));
2921 if (put_path_length > 0)
2922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2923 GNUNET_i2s (&put_path[0]));
2924 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2926 for (i = 0; i < p->length; i++)
2928 struct GNUNET_PeerIdentity peer_id;
2930 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2932 GNUNET_i2s (&peer_id));
2940 * Adds a path to the peer_infos of all the peers in the path
2942 * @param p Path to process.
2943 * @param confirmed Whether we know if the path works or not.
2946 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2950 /* TODO: invert and add */
2951 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2952 for (i++; i < p->length; i++)
2954 struct MeshPeerInfo *aux;
2955 struct MeshPeerPath *copy;
2957 aux = peer_info_get_short (p->peers[i]);
2958 copy = path_duplicate (p);
2959 copy->length = i + 1;
2960 peer_info_add_path (aux, copy, GNUNET_NO);
2966 * Send keepalive packets for a peer
2968 * @param cls Closure (tunnel for which to send the keepalive).
2969 * @param tc Notification context.
2971 * TODO: implement explicit multicast keepalive?
2974 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2978 * Search for a tunnel among the incoming tunnels
2980 * @param tid the local id of the tunnel
2982 * @return tunnel handler, NULL if doesn't exist
2984 static struct MeshTunnel *
2985 tunnel_get_incoming (MESH_TunnelNumber tid)
2987 struct GNUNET_HashCode hash;
2989 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2990 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2991 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2996 * Search for a tunnel among the tunnels for a client
2998 * @param c the client whose tunnels to search in
2999 * @param tid the local id of the tunnel
3001 * @return tunnel handler, NULL if doesn't exist
3003 static struct MeshTunnel *
3004 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
3006 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3008 return tunnel_get_incoming (tid);
3012 struct GNUNET_HashCode hash;
3014 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3015 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
3021 * Search for a tunnel by global ID using PEER_ID
3023 * @param pi owner of the tunnel
3024 * @param tid global tunnel number
3026 * @return tunnel handler, NULL if doesn't exist
3028 static struct MeshTunnel *
3029 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
3031 struct MESH_TunnelID id;
3032 struct GNUNET_HashCode hash;
3037 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
3038 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
3043 * Search for a tunnel by global ID using full PeerIdentities
3045 * @param oid owner of the tunnel
3046 * @param tid global tunnel number
3048 * @return tunnel handler, NULL if doesn't exist
3050 static struct MeshTunnel *
3051 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
3053 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
3058 * Delete an active client from the tunnel.
3064 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
3068 for (i = 0; i < t->nclients; i++)
3070 if (t->clients[i] == c)
3072 t->clients[i] = t->clients[t->nclients - 1];
3073 t->clients_fc[i] = t->clients_fc[t->nclients - 1];
3074 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
3076 GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
3084 * Delete an ignored client from the tunnel.
3090 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
3094 for (i = 0; i < t->nignore; i++)
3096 if (t->ignore[i] == c)
3098 t->ignore[i] = t->ignore[t->nignore - 1];
3099 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
3107 * Delete a client from the tunnel. It should be only done on
3108 * client disconnection, otherwise use client_ignore_tunnel.
3114 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
3116 tunnel_delete_ignored_client (t, c);
3117 tunnel_delete_active_client (t, c);
3122 * @brief Iterator to destroy MeshTunnelChildInfo of tunnel children.
3124 * Destroys queue elements of all waiting transmissions and frees all memory
3125 * used by the struct and its elements.
3127 * @param cls Closure (tunnel info).
3128 * @param key Hash of GNUNET_PEER_Id (unused).
3129 * @param value MeshTunnelChildInfo of the child.
3131 * @return always GNUNET_YES, to keep iterating
3134 tunnel_destroy_child (void *cls,
3135 const struct GNUNET_HashCode * key,
3138 struct MeshTunnelChildInfo *cinfo = value;
3139 struct MeshTunnel *t = cls;
3143 for (c = 0; c < cinfo->send_buffer_n; c++)
3145 i = (cinfo->send_buffer_start + c) % t->fwd_queue_max;
3146 if (NULL != cinfo->send_buffer[i])
3147 queue_destroy (cinfo->send_buffer[i], GNUNET_YES);
3150 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "%u %u\n", c, cinfo->send_buffer_n);
3152 GNUNET_free_non_null (cinfo->send_buffer);
3153 GNUNET_free (cinfo);
3159 * Callback used to notify a client owner of a tunnel that a peer has
3160 * disconnected, most likely because of a path change.
3162 * @param cls Closure (tunnel this notification is about).
3163 * @param peer_id Short ID of disconnected peer.
3166 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
3168 struct MeshTunnel *t = cls;
3169 struct MeshPeerInfo *peer;
3170 struct MeshPathInfo *path_info;
3172 if (NULL != t->owner && NULL != nc)
3174 struct GNUNET_MESH_PeerControl msg;
3176 msg.header.size = htons (sizeof (msg));
3177 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
3178 msg.tunnel_id = htonl (t->local_tid);
3179 GNUNET_PEER_resolve (peer_id, &msg.peer);
3180 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3181 &msg.header, GNUNET_NO);
3183 peer = peer_info_get_short (peer_id);
3184 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
3185 path_info->peer = peer;
3187 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
3192 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
3193 * needed rescources.
3194 * If peer already exists, reevaluate shortest path and change if different.
3196 * @param t Tunnel we want to add a new peer to
3197 * @param peer PeerInfo of the peer being added
3201 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
3203 struct GNUNET_PeerIdentity id;
3204 struct MeshPeerPath *best_p;
3205 struct MeshPeerPath *p;
3206 unsigned int best_cost;
3209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
3210 GNUNET_PEER_resolve (peer->id, &id);
3212 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
3215 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
3216 GNUNET_assert (GNUNET_OK ==
3217 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
3219 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3222 if (NULL != (p = peer->path_head))
3225 best_cost = tree_get_path_cost (t->tree, p);
3228 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
3235 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
3236 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
3237 t->path_refresh_task =
3238 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3242 /* Start a DHT get */
3243 peer_info_connect (peer, t);
3245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3249 * Add a path to a tunnel which we don't own, just to remember the next hop.
3250 * If destination node was already in the tunnel, the first hop information
3251 * will be replaced with the new path.
3253 * @param t Tunnel we want to add a new peer to
3254 * @param p Path to add
3255 * @param own_pos Position of local node in path.
3259 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3260 unsigned int own_pos)
3262 struct GNUNET_PeerIdentity id;
3264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3265 GNUNET_assert (0 != own_pos);
3266 tree_add_path (t->tree, p, NULL, NULL);
3267 if (own_pos < p->length - 1)
3269 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3270 tree_update_first_hops (t->tree, myid, &id);
3272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3276 * Add a client to a tunnel, initializing all needed data structures.
3278 * @param t Tunnel to which add the client.
3279 * @param c Client which to add to the tunnel.
3282 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
3284 struct MeshTunnelClientInfo clinfo;
3286 GNUNET_array_append (t->clients, t->nclients, c);
3287 clinfo.fwd_ack = t->fwd_pid + 1;
3288 clinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
3289 clinfo.fwd_pid = t->fwd_pid;
3290 clinfo.bck_pid = (uint32_t) -1; // Expected next: 0
3292 GNUNET_array_append (t->clients_fc, t->nclients, clinfo);
3297 * Notifies a tunnel that a connection has broken that affects at least
3298 * some of its peers. Sends a notification towards the root of the tree.
3299 * In case the peer is the owner of the tree, notifies the client that owns
3300 * the tunnel and tries to reconnect.
3302 * @param t Tunnel affected.
3303 * @param p1 Peer that got disconnected from p2.
3304 * @param p2 Peer that got disconnected from p1.
3306 * @return Short ID of the peer disconnected (either p1 or p2).
3307 * 0 if the tunnel remained unaffected.
3309 static GNUNET_PEER_Id
3310 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3316 tree_notify_connection_broken (t->tree, p1, p2,
3317 &tunnel_notify_client_peer_disconnected,
3319 if (myid != p1 && myid != p2)
3325 if (tree_get_predecessor (t->tree) != 0)
3327 /* We are the peer still connected, notify owner of the disconnection. */
3328 struct GNUNET_MESH_PathBroken msg;
3329 struct GNUNET_PeerIdentity neighbor;
3331 msg.header.size = htons (sizeof (msg));
3332 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3333 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3334 msg.tid = htonl (t->id.tid);
3335 msg.peer1 = my_full_id;
3336 GNUNET_PEER_resolve (pid, &msg.peer2);
3337 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3338 send_prebuilt_message (&msg.header, &neighbor, t);
3346 * Send a multicast packet to a neighbor.
3348 * @param cls Closure (Info about the multicast packet)
3349 * @param neighbor_id Short ID of the neighbor to send the packet to.
3352 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3354 struct MeshData *mdata = cls;
3355 struct MeshTransmissionDescriptor *info;
3356 struct GNUNET_PeerIdentity neighbor;
3357 struct GNUNET_MessageHeader *msg;
3359 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3361 info->mesh_data = mdata;
3362 (mdata->reference_counter) ++;
3363 info->destination = neighbor_id;
3364 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3366 GNUNET_i2s (&neighbor));
3367 info->peer = peer_info_get (&neighbor);
3368 GNUNET_assert (NULL != info->peer);
3369 msg = (struct GNUNET_MessageHeader *) mdata->data;
3372 info->mesh_data->data_len,
3379 * Queue a message in a tunnel in multicast, sending a copy to each child node
3380 * down the local one in the tunnel tree.
3382 * @param t Tunnel in which to send the data.
3383 * @param msg Message to be sent.
3386 tunnel_send_multicast (struct MeshTunnel *t,
3387 const struct GNUNET_MessageHeader *msg)
3389 struct MeshData *mdata;
3391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3392 " sending a multicast packet...\n");
3394 mdata = GNUNET_malloc (sizeof (struct MeshData));
3395 mdata->data_len = ntohs (msg->size);
3397 mdata->data = GNUNET_malloc (mdata->data_len);
3398 memcpy (mdata->data, msg, mdata->data_len);
3399 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3401 struct GNUNET_MESH_Multicast *mcast;
3403 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3404 if (t->fwd_queue_n >= t->fwd_queue_max)
3407 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " queue full!\n");
3408 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3409 " message from %s!\n",
3410 GNUNET_i2s(&mcast->oid));
3411 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3412 " message at %s!\n",
3413 GNUNET_i2s(&my_full_id));
3414 GNUNET_free (mdata->data);
3415 GNUNET_free (mdata);
3419 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3421 ntohl (mcast->ttl));
3425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3428 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3429 if (mdata->reference_counter == 0)
3431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3432 " no one to send data to\n");
3433 GNUNET_free (mdata->data);
3434 GNUNET_free (mdata);
3439 mdata->total_out = mdata->reference_counter;
3441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3442 " sending a multicast packet done\n");
3448 * Increase the SKIP value of all peers that
3449 * have not received a unicast message.
3451 * @param cls Closure (ID of the peer that HAS received the message).
3452 * @param key ID of the neighbor.
3453 * @param value Information about the neighbor.
3455 * @return GNUNET_YES to keep iterating.
3458 tunnel_add_skip (void *cls,
3459 const struct GNUNET_HashCode * key,
3462 struct GNUNET_PeerIdentity *neighbor = cls;
3463 struct MeshTunnelChildInfo *cinfo = value;
3465 /* TODO compare only pointers? key == neighbor? */
3466 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3476 * @brief Get neighbor's Flow Control information.
3478 * Retrieves the MeshTunnelChildInfo containing Flow Control data about a direct
3479 * descendant of the local node in a certain tunnel.
3480 * If the info is not yet there (recently created path), creates the data struct
3481 * and inserts it into the tunnel info, initialized to the current tunnel ACK
3484 * @param t Tunnel related.
3485 * @param peer Neighbor whose Flow Control info is needed.
3487 * @return Neighbor's Flow Control info.
3489 static struct MeshTunnelChildInfo *
3490 tunnel_get_neighbor_fc (const struct MeshTunnel *t,
3491 const struct GNUNET_PeerIdentity *peer)
3493 struct MeshTunnelChildInfo *cinfo;
3494 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3500 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3501 cinfo->id = GNUNET_PEER_intern (peer);
3502 cinfo->skip = t->fwd_pid;
3504 delta = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
3505 cinfo->fwd_ack = t->fwd_pid + delta;
3506 cinfo->bck_ack = delta;
3508 cinfo->send_buffer =
3509 GNUNET_malloc (sizeof(struct MeshPeerQueue *) * t->fwd_queue_max);
3511 GNUNET_assert (GNUNET_OK ==
3512 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
3515 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3522 * Get the Flow Control info of a client.
3524 * @param t Tunnel on which to look.
3525 * @param c Client whose ACK to get.
3527 * @return ACK value.
3529 static struct MeshTunnelClientInfo *
3530 tunnel_get_client_fc (struct MeshTunnel *t,
3531 struct MeshClient *c)
3535 for (i = 0; i < t->nclients; i++)
3537 if (t->clients[i] != c)
3539 return &t->clients_fc[i];
3542 return NULL; // avoid compiler / coverity complaints
3547 * Iterator to get the appropiate ACK value from all children nodes.
3549 * @param cls Closue (tunnel).
3550 * @param id Id of the child node.
3553 tunnel_get_child_fwd_ack (void *cls,
3556 struct GNUNET_PeerIdentity peer_id;
3557 struct MeshTunnelChildInfo *cinfo;
3558 struct MeshTunnelChildIteratorContext *ctx = cls;
3559 struct MeshTunnel *t = ctx->t;
3562 GNUNET_PEER_resolve (id, &peer_id);
3563 cinfo = tunnel_get_neighbor_fc (t, &peer_id);
3564 ack = cinfo->fwd_ack;
3567 if (GNUNET_NO == ctx->init)
3569 ctx->max_child_ack = ack;
3570 ctx->init = GNUNET_YES;
3573 if (GNUNET_YES == t->speed_min)
3575 ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
3579 ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
3586 * Get the maximum PID allowed to transmit to any
3587 * tunnel child of the local peer, depending on the tunnel
3588 * buffering/speed settings.
3592 * @return Maximum PID allowed (uint32 MAX), -1LL if node has no children.
3595 tunnel_get_children_fwd_ack (struct MeshTunnel *t)
3597 struct MeshTunnelChildIteratorContext ctx;
3599 ctx.max_child_ack = 0;
3601 tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
3603 if (0 == ctx.nchildren)
3605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3606 " tunnel has no children, no FWD ACK\n");
3610 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
3611 ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
3613 return (int64_t) ctx.max_child_ack;
3618 * Set the FWD ACK value of a client in a particular tunnel.
3620 * @param t Tunnel affected.
3621 * @param c Client whose ACK to set.
3622 * @param ack ACK value.
3625 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
3626 struct MeshClient *c,
3631 for (i = 0; i < t->nclients; i++)
3633 if (t->clients[i] != c)
3635 t->clients_fc[i].fwd_ack = ack;
3643 * Get the highest ACK value of all clients in a particular tunnel,
3644 * according to the buffering/speed settings.
3646 * @param t Tunnel on which to look.
3648 * @return Corresponding ACK value (max uint32_t).
3649 * If no clients are suscribed, -1LL.
3652 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
3657 if (0 == t->nclients)
3659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3660 " tunnel has no clients, no FWD ACK\n");
3664 for (ack = -1LL, i = 0; i < t->nclients; i++)
3667 (GNUNET_YES == t->speed_min &&
3668 GNUNET_YES == GMC_is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
3669 (GNUNET_NO == t->speed_min &&
3670 GNUNET_YES == GMC_is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
3672 ack = t->clients_fc[i].fwd_ack;
3676 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
3677 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
3679 return (uint32_t) ack;
3684 * Get the current fwd ack value for a tunnel, taking in account the tunnel
3685 * mode and the status of all children nodes.
3689 * @return Maximum PID allowed.
3692 tunnel_get_fwd_ack (struct MeshTunnel *t)
3696 uint32_t buffer_free;
3700 count = t->fwd_pid - t->skip;
3701 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
3703 child_ack = tunnel_get_children_fwd_ack (t);
3704 client_ack = tunnel_get_clients_fwd_ack (t);
3705 if (-1LL == child_ack)
3707 // Node has no children, child_ack AND core buffer are irrelevant.
3708 GNUNET_break (-1LL != client_ack); // No children AND no clients? Not good!
3709 return (uint32_t) client_ack;
3711 if (-1LL == client_ack)
3713 client_ack = ack + buffer_free; // Might overflow 32 bits, it's ok!
3715 if (GNUNET_YES == t->speed_min)
3717 ack = GMC_min_pid ((uint32_t) child_ack, ack) + buffer_free; // Might overflow 32 bits, it's ok!;
3718 ack = GMC_min_pid ((uint32_t) client_ack, ack);
3722 ack = GMC_max_pid ((uint32_t) child_ack, ack) + buffer_free; // Might overflow 32 bits, it's ok!;
3723 ack = GMC_max_pid ((uint32_t) client_ack, ack);
3725 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
3726 ack = t->fwd_pid + 1; // Might overflow 32 bits, it's ok!
3727 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3728 "c %u, bf %u, ch %lld, cl %lld, ACK: %u\n",
3729 count, buffer_free, child_ack, client_ack, ack);
3735 * Build a local ACK message and send it to a local client.
3737 * @param t Tunnel on which to send the ACK.
3738 * @param c Client to whom send the ACK.
3739 * @param ack Value of the ACK.
3742 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
3744 struct GNUNET_MESH_LocalAck msg;
3746 msg.header.size = htons (sizeof (msg));
3747 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
3748 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
3749 msg.max_pid = htonl (ack);
3750 GNUNET_SERVER_notification_context_unicast(nc,
3757 * Build an ACK message and queue it to send to the given peer.
3759 * @param t Tunnel on which to send the ACK.
3760 * @param peer Peer to whom send the ACK.
3761 * @param ack Value of the ACK.
3764 send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
3766 struct GNUNET_MESH_ACK msg;
3768 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3769 msg.header.size = htons (sizeof (msg));
3770 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3771 msg.pid = htonl (ack);
3772 msg.tid = htonl (t->id.tid);
3774 send_prebuilt_message (&msg.header, peer, t);
3779 * Notify a the owner of a tunnel about how many more
3780 * payload packages will we accept on a given tunnel.
3782 * @param t Tunnel on which to send the ACK.
3785 tunnel_send_client_fwd_ack (struct MeshTunnel *t)
3789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3790 "Sending client FWD ACK on tunnel %X\n",
3793 ack = tunnel_get_fwd_ack (t);
3795 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
3796 if (t->last_fwd_ack == ack)
3799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
3800 t->last_fwd_ack = ack;
3801 send_local_ack (t, t->owner, ack);
3806 * Send an ACK informing the predecessor about the available buffer space.
3807 * In case there is no predecessor, inform the owning client.
3808 * If buffering is off, send only on behalf of children or self if endpoint.
3809 * If buffering is on, send when sent to children and buffer space is free.
3810 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
3811 * the ACK itself goes "back" (towards root).
3813 * @param t Tunnel on which to send the ACK.
3814 * @param type Type of message that triggered the ACK transmission.
3817 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
3819 struct GNUNET_PeerIdentity id;
3822 if (NULL != t->owner)
3824 tunnel_send_client_fwd_ack (t);
3827 /* Is it after unicast / multicast retransmission? */
3830 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3831 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3832 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3833 "ACK due to FWD DATA retransmission\n");
3834 if (GNUNET_YES == t->nobuffer)
3836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3840 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3841 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3847 /* Check if we need no retransmit the ACK */
3848 if (t->fwd_queue_max > t->fwd_queue_n * 4 &&
3849 GMC_is_pid_bigger(t->last_fwd_ack, t->fwd_pid))
3851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3853 " t->qmax: %u, t->qn: %u\n",
3854 t->fwd_queue_max, t->fwd_queue_n);
3855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3856 " t->pid: %u, t->ack: %u\n",
3857 t->fwd_pid, t->last_fwd_ack);
3861 /* Ok, ACK might be necessary, what PID to ACK? */
3862 ack = tunnel_get_fwd_ack (t);
3864 /* If speed_min and not all children have ack'd, dont send yet */
3865 if (ack == t->last_fwd_ack)
3867 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
3871 t->last_fwd_ack = ack;
3872 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3873 send_ack (t, &id, ack);
3879 * Iterator to send a child node a BCK ACK to allow him to send more
3882 * @param cls Closure (tunnel).
3883 * @param id Id of the child node.
3886 tunnel_send_child_bck_ack (void *cls,
3889 struct MeshTunnel *t = cls;
3890 struct MeshTunnelChildInfo *cinfo;
3891 struct GNUNET_PeerIdentity peer;
3893 GNUNET_PEER_resolve (id, &peer);
3894 cinfo = tunnel_get_neighbor_fc (t, &peer);
3896 if (cinfo->bck_ack != cinfo->pid &&
3897 GNUNET_NO == GMC_is_pid_bigger (cinfo->bck_ack, cinfo->pid))
3901 send_ack (t, &peer, cinfo->bck_ack);
3906 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
3908 * Iterates over all clients and sends BCK ACKs to the ones that need it.
3910 * @param t Tunnel on which to send the BCK ACKs.
3913 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
3916 unsigned int tunnel_delta;
3918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Sending BCK ACK to clients\n");
3920 tunnel_delta = t->bck_ack - t->bck_pid;
3921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " tunnel delta: %u\n", tunnel_delta);
3923 /* Find client whom to allow to send to origin (with lowest buffer space) */
3924 for (i = 0; i < t->nclients; i++)
3926 struct MeshTunnelClientInfo *clinfo;
3929 clinfo = &t->clients_fc[i];
3930 delta = clinfo->bck_ack - clinfo->bck_pid;
3931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u delta: %u\n",
3932 t->clients[i]->id, delta);
3934 if ((GNUNET_NO == t->nobuffer && tunnel_delta > delta) ||
3935 (GNUNET_YES == t->nobuffer && 0 == delta))
3939 ack = clinfo->bck_pid;
3940 ack += t->nobuffer ? 1 : tunnel_delta;
3941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3942 " sending ack to client %u: %u\n",
3943 t->clients[i]->id, ack);
3944 send_local_ack (t, t->clients[i], ack);
3945 clinfo->bck_ack = ack;
3952 * Send an ACK informing the children nodes and destination clients about
3953 * the available buffer space.
3954 * If buffering is off, send only on behalf of root (can be self).
3955 * If buffering is on, send when sent to predecessor and buffer space is free.
3956 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
3957 * the ACK itself goes "forward" (towards children/clients).
3959 * @param t Tunnel on which to send the ACK.
3960 * @param type Type of message that triggered the ACK transmission.
3963 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
3965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3966 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
3967 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
3968 /* Is it after data to_origin retransmission? */
3971 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3972 if (GNUNET_YES == t->nobuffer)
3974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3975 " Not sending ACK, nobuffer\n");
3979 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3980 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3986 tunnel_send_clients_bck_ack (t);
3987 tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, t);
3992 * @brief Re-initiate traffic to this peer if necessary.
3994 * Check if there is traffic queued towards this peer
3995 * and the core transmit handle is NULL (traffic was stalled).
3996 * If so, call core tmt rdy.
3998 * @param cls Closure (unused)
3999 * @param peer_id Short ID of peer to which initiate traffic.
4002 peer_unlock_queue(void *cls, GNUNET_PEER_Id peer_id)
4004 struct MeshPeerInfo *peer;
4005 struct GNUNET_PeerIdentity id;
4006 struct MeshPeerQueue *q;
4009 peer = peer_info_get_short(peer_id);
4010 if (NULL != peer->core_transmit)
4013 q = queue_get_next(peer);
4016 /* Might br multicast traffic already sent to this particular peer but
4017 * not to other children in this tunnel.
4018 * This way t->queue_n would be > 0 but the queue of this particular peer
4024 GNUNET_PEER_resolve (peer->id, &id);
4025 peer->core_transmit =
4026 GNUNET_CORE_notify_transmit_ready(core_handle,
4029 GNUNET_TIME_UNIT_FOREVER_REL,
4039 * @brief Allow transmission of FWD traffic on this tunnel
4041 * Check if there is traffic queued towards any children
4042 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4044 * @param t Tunnel on which to unlock FWD traffic.
4047 tunnel_unlock_fwd_queues (struct MeshTunnel *t)
4049 if (0 == t->fwd_queue_n)
4052 tree_iterate_children (t->tree, &peer_unlock_queue, NULL);
4057 * @brief Allow transmission of BCK traffic on this tunnel
4059 * Check if there is traffic queued towards the root of the tree
4060 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4062 * @param t Tunnel on which to unlock BCK traffic.
4065 tunnel_unlock_bck_queue (struct MeshTunnel *t)
4067 if (0 == t->bck_queue_n)
4070 peer_unlock_queue(NULL, tree_get_predecessor(t->tree));
4075 * Send a message to all peers in this tunnel that the tunnel is no longer
4078 * @param t The tunnel whose peers to notify.
4081 tunnel_send_destroy (struct MeshTunnel *t)
4083 struct GNUNET_MESH_TunnelDestroy msg;
4085 msg.header.size = htons (sizeof (msg));
4086 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
4087 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
4088 msg.tid = htonl (t->id.tid);
4089 tunnel_send_multicast (t, &msg.header);
4094 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
4096 * @param cls Closure (Tunnel which to cancel).
4097 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
4100 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
4102 struct MeshTunnel *t = cls;
4103 struct MeshPeerInfo *peer_info;
4104 struct MeshPeerQueue *pq;
4105 struct MeshPeerQueue *next;
4107 peer_info = peer_info_get_short (neighbor_id);
4108 for (pq = peer_info->queue_head; NULL != pq; pq = next)
4111 if (pq->tunnel == t)
4113 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST == pq->type ||
4114 GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
4115 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
4117 // Should have been removed on destroy children
4120 queue_destroy (pq, GNUNET_YES);
4123 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
4125 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
4126 peer_info->core_transmit = NULL;
4131 * Destroy the tunnel and free any allocated resources linked to it.
4133 * @param t the tunnel to destroy
4135 * @return GNUNET_OK on success
4138 tunnel_destroy (struct MeshTunnel *t)
4140 struct MeshClient *c;
4141 struct GNUNET_HashCode hash;
4152 struct GNUNET_PeerIdentity id;
4154 GNUNET_PEER_resolve (t->id.oid, &id);
4155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
4156 GNUNET_i2s (&id), t->id.tid);
4158 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4162 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4163 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
4169 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4172 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
4177 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4178 for (i = 0; i < t->nclients; i++)
4182 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
4188 for (i = 0; i < t->nignore; i++)
4192 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
4198 if (t->nclients > 0)
4201 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
4206 GNUNET_free (t->clients);
4208 if (NULL != t->peers)
4210 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
4212 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
4215 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4216 &tunnel_destroy_child,
4218 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
4220 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
4222 tree_destroy (t->tree);
4224 if (NULL != t->regex_ctx)
4225 regex_cancel_search (t->regex_ctx);
4226 if (NULL != t->dht_get_type)
4227 GNUNET_DHT_get_stop (t->dht_get_type);
4228 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4229 GNUNET_SCHEDULER_cancel (t->timeout_task);
4230 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
4231 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
4234 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
4235 GNUNET_assert (0 <= n_tunnels);
4242 * Create a new tunnel
4244 * @param owner Who is the owner of the tunnel (short ID).
4245 * @param tid Tunnel Number of the tunnel.
4246 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
4247 * @param local Tunnel Number for the tunnel, for the client point of view.
4249 * @return A new initialized tunnel. NULL on error.
4251 static struct MeshTunnel *
4252 tunnel_new (GNUNET_PEER_Id owner,
4253 MESH_TunnelNumber tid,
4254 struct MeshClient *client,
4255 MESH_TunnelNumber local)
4257 struct MeshTunnel *t;
4258 struct GNUNET_HashCode hash;
4260 if (n_tunnels >= max_tunnels && NULL == client)
4263 t = GNUNET_malloc (sizeof (struct MeshTunnel));
4266 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
4267 t->bck_queue_max = t->fwd_queue_max;
4268 t->tree = tree_new (owner);
4270 t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
4271 t->bck_pid = (uint32_t) -1; // Next (expected) = 0
4272 t->bck_ack = INITIAL_WINDOW_SIZE - 1;
4273 t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
4274 t->local_tid = local;
4275 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8);
4277 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
4279 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4281 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
4282 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4289 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4296 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4298 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
4299 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4303 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4313 * Removes an explicit path from a tunnel, freeing all intermediate nodes
4314 * that are no longer needed, as well as nodes of no longer reachable peers.
4315 * The tunnel itself is also destoyed if results in a remote empty tunnel.
4317 * @param t Tunnel from which to remove the path.
4318 * @param peer Short id of the peer which should be removed.
4321 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
4323 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
4329 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
4330 * client when the client disconnects. If the client is not the owner, the
4331 * owner will get notified if no more clients are in the tunnel and the client
4332 * get removed from the tunnel's list.
4334 * @param cls closure (client that is disconnecting)
4335 * @param key the hash of the local tunnel id (used to access the hashmap)
4336 * @param value the value stored at the key (tunnel to destroy)
4338 * @return GNUNET_OK on success
4341 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
4343 struct MeshTunnel *t = value;
4344 struct MeshClient *c = cls;
4347 send_client_tunnel_disconnect(t, c);
4350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4351 "Client %u is destination, keeping the tunnel alive.\n", c->id);
4352 tunnel_delete_client(t, c);
4353 client_delete_tunnel(c, t);
4356 tunnel_send_destroy(t);
4357 r = tunnel_destroy (t);
4363 * Timeout function, destroys tunnel if called
4365 * @param cls Closure (tunnel to destroy).
4366 * @param tc TaskContext
4369 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4371 struct MeshTunnel *t = cls;
4372 struct GNUNET_PeerIdentity id;
4374 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4375 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4377 GNUNET_PEER_resolve(t->id.oid, &id);
4378 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4379 "Tunnel %s [%X] timed out. Destroying.\n",
4380 GNUNET_i2s(&id), t->id.tid);
4385 * Resets the tunnel timeout. Starts it if no timeout was running.
4387 * @param t Tunnel whose timeout to reset.
4389 * TODO use heap to improve efficiency of scheduler.
4392 tunnel_reset_timeout (struct MeshTunnel *t)
4394 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4395 GNUNET_SCHEDULER_cancel (t->timeout_task);
4397 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
4398 (refresh_path_time, 4), &tunnel_timeout, t);
4402 /******************************************************************************/
4403 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4404 /******************************************************************************/
4407 * Function to send a create path packet to a peer.
4409 * @param cls closure
4410 * @param size number of bytes available in buf
4411 * @param buf where the callee should write the message
4412 * @return number of bytes written to buf
4415 send_core_path_create (void *cls, size_t size, void *buf)
4417 struct MeshPathInfo *info = cls;
4418 struct GNUNET_MESH_ManipulatePath *msg;
4419 struct GNUNET_PeerIdentity *peer_ptr;
4420 struct MeshTunnel *t = info->t;
4421 struct MeshPeerPath *p = info->path;
4426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
4428 sizeof (struct GNUNET_MESH_ManipulatePath) +
4429 p->length * sizeof (struct GNUNET_PeerIdentity);
4431 if (size < size_needed || NULL == buf)
4436 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
4437 msg->header.size = htons (size_needed);
4438 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
4439 msg->tid = ntohl (t->id.tid);
4442 if (GNUNET_YES == t->speed_min)
4443 opt |= MESH_TUNNEL_OPT_SPEED_MIN;
4444 if (GNUNET_YES == t->nobuffer)
4445 opt |= MESH_TUNNEL_OPT_NOBUFFER;
4446 msg->opt = htonl(opt);
4448 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
4449 for (i = 0; i < p->length; i++)
4451 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
4457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4458 "CREATE PATH (%u bytes long) sent!\n", size_needed);
4464 * Fill the core buffer
4466 * @param cls closure (data itself)
4467 * @param size number of bytes available in buf
4468 * @param buf where the callee should write the message
4470 * @return number of bytes written to buf
4473 send_core_data_multicast (void *cls, size_t size, void *buf)
4475 struct MeshTransmissionDescriptor *info = cls;
4478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
4479 GNUNET_assert (NULL != info);
4480 GNUNET_assert (NULL != info->peer);
4481 total_size = info->mesh_data->data_len;
4482 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
4484 if (total_size > size)
4489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
4490 memcpy (buf, info->mesh_data->data, total_size);
4493 struct GNUNET_MESH_Multicast *mc;
4494 struct GNUNET_MessageHeader *mh;
4497 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
4499 mc = (struct GNUNET_MESH_Multicast *) mh;
4500 mh = (struct GNUNET_MessageHeader *) &mc[1];
4501 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4502 " multicast, payload type %s\n",
4503 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4505 " multicast, payload size %u\n", ntohs (mh->size));
4509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %s\n",
4510 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4514 data_descriptor_decrement_rc (info->mesh_data);
4515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
4517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
4523 * Creates a path ack message in buf and frees all unused resources.
4525 * @param cls closure (MeshTransmissionDescriptor)
4526 * @param size number of bytes available in buf
4527 * @param buf where the callee should write the message
4528 * @return number of bytes written to buf
4531 send_core_path_ack (void *cls, size_t size, void *buf)
4533 struct MeshTransmissionDescriptor *info = cls;
4534 struct GNUNET_MESH_PathACK *msg = buf;
4536 GNUNET_assert (NULL != info);
4537 if (sizeof (struct GNUNET_MESH_PathACK) > size)
4542 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
4543 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
4544 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
4545 msg->tid = htonl (info->origin->tid);
4546 msg->peer_id = my_full_id;
4549 /* TODO add signature */
4551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
4552 return sizeof (struct GNUNET_MESH_PathACK);
4557 * Free a transmission that was already queued with all resources
4558 * associated to the request.
4560 * @param queue Queue handler to cancel.
4561 * @param clear_cls Is it necessary to free associated cls?
4564 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4566 struct MeshTransmissionDescriptor *dd;
4567 struct MeshPathInfo *path_info;
4569 if (GNUNET_YES == clear_cls)
4571 switch (queue->type)
4573 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4574 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4575 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
4578 data_descriptor_decrement_rc (dd->mesh_data);
4580 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
4582 path_info = queue->cls;
4583 path_destroy (path_info->path);
4587 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4588 " type %s unknown!\n",
4589 GNUNET_MESH_DEBUG_M2S(queue->type));
4591 GNUNET_free_non_null (queue->cls);
4593 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
4594 queue->peer->queue_tail,
4596 GNUNET_free (queue);
4601 * @brief Get the next transmittable message from the queue.
4603 * This will be the head, except in the case of being a data packet
4604 * not allowed by the destination peer.
4606 * @param peer Destination peer.
4608 * @return The next viable MeshPeerQueue element to send to that peer.
4609 * NULL when there are no transmittable messages.
4611 struct MeshPeerQueue *
4612 queue_get_next (const struct MeshPeerInfo *peer)
4614 struct MeshPeerQueue *q;
4615 struct MeshTunnel *t;
4616 struct MeshTransmissionDescriptor *info;
4617 struct MeshTunnelChildInfo *cinfo;
4618 struct GNUNET_MESH_Unicast *ucast;
4619 struct GNUNET_MESH_ToOrigin *to_orig;
4620 struct GNUNET_MESH_Multicast *mcast;
4621 struct GNUNET_PeerIdentity id;
4625 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
4626 for (q = peer->queue_head; NULL != q; q = q->next)
4630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4632 GNUNET_MESH_DEBUG_M2S(q->type));
4635 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4636 ucast = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
4637 pid = ntohl (ucast->pid);
4638 GNUNET_PEER_resolve (info->peer->id, &id);
4639 cinfo = tunnel_get_neighbor_fc(t, &id);
4640 ack = cinfo->fwd_ack;
4642 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4643 to_orig = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
4644 pid = ntohl (to_orig->pid);
4647 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4648 mcast = (struct GNUNET_MESH_Multicast *) info->mesh_data->data;
4649 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST != ntohs(mcast->header.type))
4651 // Not a multicast payload: multicast control traffic (destroy, etc)
4654 pid = ntohl (mcast->pid);
4655 GNUNET_PEER_resolve (info->peer->id, &id);
4656 cinfo = tunnel_get_neighbor_fc(t, &id);
4657 ack = cinfo->fwd_ack;
4660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4665 "********* ACK: %u, PID: %u\n",
4667 if (GNUNET_NO == GMC_is_pid_bigger(pid, ack))
4669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4676 "********* NEXT!\n");
4679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4680 "********* nothing found\n");
4686 * Core callback to write a queued packet to core buffer
4688 * @param cls Closure (peer info).
4689 * @param size Number of bytes available in buf.
4690 * @param buf Where the to write the message.
4692 * @return number of bytes written to buf
4695 queue_send (void *cls, size_t size, void *buf)
4697 struct MeshPeerInfo *peer = cls;
4698 struct GNUNET_MessageHeader *msg;
4699 struct MeshPeerQueue *queue;
4700 struct MeshTunnel *t;
4701 struct MeshTunnelChildInfo *cinfo;
4702 struct GNUNET_PeerIdentity dst_id;
4705 peer->core_transmit = NULL;
4707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
4708 queue = queue_get_next (peer);
4710 /* Queue has no internal mesh traffic nor sendable payload */
4713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
4714 if (NULL == peer->queue_head)
4715 GNUNET_break (0); // Should've been canceled
4718 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
4720 GNUNET_PEER_resolve (peer->id, &dst_id);
4721 /* Check if buffer size is enough for the message */
4722 if (queue->size > size)
4724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4725 "********* not enough room, reissue\n");
4726 peer->core_transmit =
4727 GNUNET_CORE_notify_transmit_ready (core_handle,
4730 GNUNET_TIME_UNIT_FOREVER_REL,
4737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
4740 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
4743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4744 "********* unicast: t->q (%u/%u)\n",
4745 t->fwd_queue_n, t->fwd_queue_max);
4747 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
4750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
4754 switch (queue->type)
4757 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4758 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
4759 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
4760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4761 "********* raw: %s\n",
4762 GNUNET_MESH_DEBUG_M2S (queue->type));
4764 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4765 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4766 data_size = send_core_data_raw (queue->cls, size, buf);
4767 msg = (struct GNUNET_MessageHeader *) buf;
4768 switch (ntohs (msg->type)) // Type of preconstructed message
4770 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4771 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
4773 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4774 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4780 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4781 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
4783 struct MeshTransmissionDescriptor *info = queue->cls;
4785 if ((1 == info->mesh_data->reference_counter
4786 && GNUNET_YES == t->speed_min)
4788 (info->mesh_data->total_out == info->mesh_data->reference_counter
4789 && GNUNET_NO == t->speed_min))
4791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4792 "********* considered sent\n");
4796 data_size = send_core_data_multicast(queue->cls, size, buf);
4797 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
4799 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
4801 data_size = send_core_path_create (queue->cls, size, buf);
4803 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
4804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
4805 data_size = send_core_path_ack (queue->cls, size, buf);
4807 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
4808 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path keepalive\n");
4809 data_size = send_core_data_multicast (queue->cls, size, buf);
4813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4814 "********* type unknown: %u\n",
4818 switch (queue->type)
4820 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4821 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4822 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4823 cinfo = tunnel_get_neighbor_fc (t, &dst_id);
4824 if (cinfo->send_buffer[cinfo->send_buffer_start] != queue)
4827 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4828 "at pos %u (%p) != %p\n",
4829 cinfo->send_buffer_start,
4830 cinfo->send_buffer[cinfo->send_buffer_start],
4833 if (cinfo->send_buffer_n > 0) {
4834 cinfo->send_buffer[cinfo->send_buffer_start] = NULL;
4835 cinfo->send_buffer_n--;
4836 cinfo->send_buffer_start++;
4837 cinfo->send_buffer_start %= t->fwd_queue_max;
4848 /* Free queue, but cls was freed by send_core_* */
4849 queue_destroy (queue, GNUNET_NO);
4851 if (GNUNET_YES == t->destroy && 0 == t->fwd_queue_n)
4853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
4857 /* If more data in queue, send next */
4858 queue = queue_get_next(peer);
4861 struct GNUNET_PeerIdentity id;
4863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
4864 GNUNET_PEER_resolve (peer->id, &id);
4865 peer->core_transmit =
4866 GNUNET_CORE_notify_transmit_ready(core_handle,
4869 GNUNET_TIME_UNIT_FOREVER_REL,
4877 if (NULL != peer->queue_head)
4878 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4879 "********* %s stalled\n",
4880 GNUNET_i2s(&my_full_id));
4882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
4888 * @brief Queue and pass message to core when possible.
4890 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
4891 * and accounts for it. In case the queue is full, the message is dropped and
4894 * Otherwise, message is treated as internal and allowed to go regardless of
4897 * @param cls Closure (@c type dependant). It will be used by queue_send to
4898 * build the message to be sent if not already prebuilt.
4899 * @param type Type of the message, 0 for a raw message.
4900 * @param size Size of the message.
4901 * @param dst Neighbor to send message to.
4902 * @param t Tunnel this message belongs to.
4905 queue_add (void *cls, uint16_t type, size_t size,
4906 struct MeshPeerInfo *dst, struct MeshTunnel *t)
4908 struct MeshPeerQueue *queue;
4909 struct MeshTunnelChildInfo *cinfo;
4910 struct GNUNET_PeerIdentity id;
4916 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
4917 GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
4919 n = &t->fwd_queue_n;
4920 max = &t->fwd_queue_max;
4922 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
4924 n = &t->bck_queue_n;
4925 max = &t->bck_queue_max;
4930 if (NULL == t->owner)
4931 GNUNET_break_op(0); // TODO: kill connection?
4934 GNUNET_STATISTICS_update(stats, "# messages dropped (buffer full)",
4936 return; // Drop message
4940 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
4946 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
4947 GNUNET_PEER_resolve (dst->id, &id);
4948 if (NULL == dst->core_transmit)
4950 dst->core_transmit =
4951 GNUNET_CORE_notify_transmit_ready (core_handle,
4954 GNUNET_TIME_UNIT_FOREVER_REL,
4960 if (NULL == n) // Is this internal mesh traffic?
4963 // It's payload, keep track of buffer per peer.
4964 cinfo = tunnel_get_neighbor_fc(t, &id);
4965 i = (cinfo->send_buffer_start + cinfo->send_buffer_n) % t->fwd_queue_max;
4966 if (NULL != cinfo->send_buffer[i])
4968 GNUNET_break (cinfo->send_buffer_n == t->fwd_queue_max); // aka i == start
4969 queue_destroy(cinfo->send_buffer[cinfo->send_buffer_start], GNUNET_YES);
4970 cinfo->send_buffer_start++;
4971 cinfo->send_buffer_start %= t->fwd_queue_max;
4972 cinfo->send_buffer_n--;
4974 cinfo->send_buffer[i] = queue;
4975 cinfo->send_buffer_n++;
4976 if (cinfo->send_buffer_n > t->fwd_queue_max)
4979 cinfo->send_buffer_n = t->fwd_queue_max;
4984 /******************************************************************************/
4985 /******************** MESH NETWORK HANDLERS **************************/
4986 /******************************************************************************/
4990 * Core handler for path creation
4992 * @param cls closure
4993 * @param message message
4994 * @param peer peer identity this notification is about
4995 * @param atsi performance data
4996 * @param atsi_count number of records in 'atsi'
4998 * @return GNUNET_OK to keep the connection open,
4999 * GNUNET_SYSERR to close it (signal serious error)
5002 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
5003 const struct GNUNET_MessageHeader *message,
5004 const struct GNUNET_ATS_Information *atsi,
5005 unsigned int atsi_count)
5007 unsigned int own_pos;
5010 MESH_TunnelNumber tid;
5011 struct GNUNET_MESH_ManipulatePath *msg;
5012 struct GNUNET_PeerIdentity *pi;
5013 struct GNUNET_HashCode hash;
5014 struct MeshPeerPath *path;
5015 struct MeshPeerInfo *dest_peer_info;
5016 struct MeshPeerInfo *orig_peer_info;
5017 struct MeshTunnel *t;
5019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5020 "Received a path create msg [%s]\n",
5021 GNUNET_i2s (&my_full_id));
5022 size = ntohs (message->size);
5023 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5025 GNUNET_break_op (0);
5029 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5030 if (size % sizeof (struct GNUNET_PeerIdentity))
5032 GNUNET_break_op (0);
5035 size /= sizeof (struct GNUNET_PeerIdentity);
5038 GNUNET_break_op (0);
5041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5042 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5044 tid = ntohl (msg->tid);
5045 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5047 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
5048 t = tunnel_get (pi, tid);
5049 if (NULL == t) // FIXME only for INCOMING tunnels?
5053 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
5054 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
5057 // FIXME notify failure
5060 opt = ntohl (msg->opt);
5061 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
5062 GNUNET_YES : GNUNET_NO;
5063 t->nobuffer = (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER)) ?
5064 GNUNET_YES : GNUNET_NO;
5065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5066 " speed_min: %d, nobuffer:%d\n",
5067 t->speed_min, t->nobuffer);
5069 if (GNUNET_YES == t->nobuffer)
5071 t->bck_queue_max = 1;
5072 t->fwd_queue_max = 1;
5075 // FIXME only assign a local tid if a local client is interested (on demand)
5076 while (NULL != tunnel_get_incoming (next_local_tid))
5077 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5078 t->local_tid_dest = next_local_tid++;
5079 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5082 tunnel_reset_timeout (t);
5083 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
5085 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
5086 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
5094 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
5095 if (NULL == dest_peer_info)
5097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5098 " Creating PeerInfo for destination.\n");
5099 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5100 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
5101 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
5103 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5105 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
5106 if (NULL == orig_peer_info)
5108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5109 " Creating PeerInfo for origin.\n");
5110 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5111 orig_peer_info->id = GNUNET_PEER_intern (pi);
5112 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
5113 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5116 path = path_new (size);
5118 for (i = 0; i < size; i++)
5120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5121 GNUNET_i2s (&pi[i]));
5122 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5123 if (path->peers[i] == myid)
5126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5129 /* cannot be self, must be 'not found' */
5130 /* create path: self not found in path through self */
5131 GNUNET_break_op (0);
5132 path_destroy (path);
5136 path_add_to_peers (path, GNUNET_NO);
5137 tunnel_add_path (t, path, own_pos);
5138 if (own_pos == size - 1)
5140 /* It is for us! Send ack. */
5141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5142 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
5143 if (NULL == t->peers)
5145 /* New tunnel! Notify clients on first payload message. */
5146 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
5148 GNUNET_break (GNUNET_SYSERR !=
5149 GNUNET_CONTAINER_multihashmap_put (t->peers,
5150 &my_full_id.hashPubKey,
5153 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
5158 struct MeshPeerPath *path2;
5160 /* It's for somebody else! Retransmit. */
5161 path2 = path_duplicate (path);
5162 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
5163 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
5164 path2 = path_duplicate (path);
5165 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
5166 send_create_path (dest_peer_info, path, t);
5173 * Core handler for path destruction
5175 * @param cls closure
5176 * @param message message
5177 * @param peer peer identity this notification is about
5178 * @param atsi performance data
5179 * @param atsi_count number of records in 'atsi'
5181 * @return GNUNET_OK to keep the connection open,
5182 * GNUNET_SYSERR to close it (signal serious error)
5185 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5186 const struct GNUNET_MessageHeader *message,
5187 const struct GNUNET_ATS_Information *atsi,
5188 unsigned int atsi_count)
5190 struct GNUNET_MESH_ManipulatePath *msg;
5191 struct GNUNET_PeerIdentity *pi;
5192 struct MeshPeerPath *path;
5193 struct MeshTunnel *t;
5194 unsigned int own_pos;
5198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5199 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
5200 size = ntohs (message->size);
5201 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5203 GNUNET_break_op (0);
5207 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5208 if (size % sizeof (struct GNUNET_PeerIdentity))
5210 GNUNET_break_op (0);
5213 size /= sizeof (struct GNUNET_PeerIdentity);
5216 GNUNET_break_op (0);
5219 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5221 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5222 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5224 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
5226 t = tunnel_get (pi, ntohl (msg->tid));
5229 /* TODO notify back: we don't know this tunnel */
5230 GNUNET_break_op (0);
5233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5234 path = path_new (size);
5236 for (i = 0; i < size; i++)
5238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5239 GNUNET_i2s (&pi[i]));
5240 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5241 if (path->peers[i] == myid)
5244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5245 if (own_pos < path->length - 1)
5246 send_prebuilt_message (message, &pi[own_pos + 1], t);
5248 send_client_tunnel_disconnect(t, NULL);
5250 tunnel_delete_peer (t, path->peers[path->length - 1]);
5251 path_destroy (path);
5257 * Core handler for notifications of broken paths
5259 * @param cls closure
5260 * @param message message
5261 * @param peer peer identity this notification is about
5262 * @param atsi performance data
5263 * @param atsi_count number of records in 'atsi'
5265 * @return GNUNET_OK to keep the connection open,
5266 * GNUNET_SYSERR to close it (signal serious error)
5269 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
5270 const struct GNUNET_MessageHeader *message,
5271 const struct GNUNET_ATS_Information *atsi,
5272 unsigned int atsi_count)
5274 struct GNUNET_MESH_PathBroken *msg;
5275 struct MeshTunnel *t;
5277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5278 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
5279 msg = (struct GNUNET_MESH_PathBroken *) message;
5280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5281 GNUNET_i2s (&msg->peer1));
5282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5283 GNUNET_i2s (&msg->peer2));
5284 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5287 GNUNET_break_op (0);
5290 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
5291 GNUNET_PEER_search (&msg->peer2));
5298 * Core handler for tunnel destruction
5300 * @param cls closure
5301 * @param message message
5302 * @param peer peer identity this notification is about
5303 * @param atsi performance data
5304 * @param atsi_count number of records in 'atsi'
5306 * @return GNUNET_OK to keep the connection open,
5307 * GNUNET_SYSERR to close it (signal serious error)
5310 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5311 const struct GNUNET_MessageHeader *message,
5312 const struct GNUNET_ATS_Information *atsi,
5313 unsigned int atsi_count)
5315 struct GNUNET_MESH_TunnelDestroy *msg;
5316 struct MeshTunnel *t;
5318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5319 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
5320 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
5321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
5322 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
5323 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5326 /* Probably already got the message from another path,
5327 * destroyed the tunnel and retransmitted to children.
5330 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5333 if (t->id.oid == myid)
5335 GNUNET_break_op (0);
5338 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5340 /* Tunnel was incoming, notify clients */
5341 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
5342 t->local_tid, t->local_tid_dest);
5343 send_clients_tunnel_destroy (t);
5345 tunnel_send_destroy (t);
5346 t->destroy = GNUNET_YES;
5347 // TODO: add timeout to destroy the tunnel anyway
5353 * Core handler for mesh network traffic going from the origin to a peer
5355 * @param cls closure
5356 * @param peer peer identity this notification is about
5357 * @param message message
5358 * @param atsi performance data
5359 * @param atsi_count number of records in 'atsi'
5360 * @return GNUNET_OK to keep the connection open,
5361 * GNUNET_SYSERR to close it (signal serious error)
5364 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5365 const struct GNUNET_MessageHeader *message,
5366 const struct GNUNET_ATS_Information *atsi,
5367 unsigned int atsi_count)
5369 struct GNUNET_MESH_Unicast *msg;
5370 struct GNUNET_PeerIdentity *neighbor;
5371 struct MeshTunnelChildInfo *cinfo;
5372 struct MeshTunnel *t;
5373 GNUNET_PEER_Id dest_id;
5378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
5381 size = ntohs (message->size);
5383 sizeof (struct GNUNET_MESH_Unicast) +
5384 sizeof (struct GNUNET_MessageHeader))
5389 msg = (struct GNUNET_MESH_Unicast *) message;
5390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5391 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5393 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5396 /* TODO notify back: we don't know this tunnel */
5397 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5398 GNUNET_break_op (0);
5401 pid = ntohl (msg->pid);
5402 if (t->fwd_pid == pid)
5404 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5405 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5406 " Already seen pid %u, DROPPING!\n", pid);
5411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5412 " pid %u not seen yet, forwarding\n", pid);
5415 t->skip += (pid - t->fwd_pid) - 1;
5418 if (GMC_is_pid_bigger (pid, t->last_fwd_ack))
5420 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5421 GNUNET_break_op (0);
5422 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5423 "Received PID %u, ACK %u\n",
5424 pid, t->last_fwd_ack);
5428 tunnel_reset_timeout (t);
5429 dest_id = GNUNET_PEER_search (&msg->destination);
5430 if (dest_id == myid)
5432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5433 " it's for us! sending to clients...\n");
5434 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
5435 send_subscribed_clients (message, &msg[1].header, t);
5436 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5439 ttl = ntohl (msg->ttl);
5440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5443 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5444 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5445 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5449 " not for us, retransmitting...\n");
5451 neighbor = tree_get_first_hop (t->tree, dest_id);
5452 cinfo = tunnel_get_neighbor_fc (t, neighbor);
5454 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
5457 if (GNUNET_YES == t->nobuffer &&
5458 GNUNET_YES == GMC_is_pid_bigger (pid, cinfo->fwd_ack))
5460 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5461 GNUNET_break_op (0);
5464 send_prebuilt_message (message, neighbor, t);
5465 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
5471 * Core handler for mesh network traffic going from the origin to all peers
5473 * @param cls closure
5474 * @param message message
5475 * @param peer peer identity this notification is about
5476 * @param atsi performance data
5477 * @param atsi_count number of records in 'atsi'
5478 * @return GNUNET_OK to keep the connection open,
5479 * GNUNET_SYSERR to close it (signal serious error)
5481 * TODO: Check who we got this from, to validate route.
5484 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5485 const struct GNUNET_MessageHeader *message,
5486 const struct GNUNET_ATS_Information *atsi,
5487 unsigned int atsi_count)
5489 struct GNUNET_MESH_Multicast *msg;
5490 struct MeshTunnel *t;
5494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
5496 size = ntohs (message->size);
5497 if (sizeof (struct GNUNET_MESH_Multicast) +
5498 sizeof (struct GNUNET_MessageHeader) > size)
5500 GNUNET_break_op (0);
5503 msg = (struct GNUNET_MESH_Multicast *) message;
5504 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5508 /* TODO notify that we dont know that tunnel */
5509 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5510 GNUNET_break_op (0);
5513 pid = ntohl (msg->pid);
5514 if (t->fwd_pid == pid)
5516 /* already seen this packet, drop */
5517 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5519 " Already seen pid %u, DROPPING!\n", pid);
5520 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5526 " pid %u not seen yet, forwarding\n", pid);
5528 t->skip += (pid - t->fwd_pid) - 1;
5530 tunnel_reset_timeout (t);
5532 /* Transmit to locally interested clients */
5533 if (NULL != t->peers &&
5534 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
5536 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
5537 send_subscribed_clients (message, &msg[1].header, t);
5538 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
5541 if (ntohl (msg->ttl) == 0)
5543 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5544 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5545 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5548 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
5549 tunnel_send_multicast (t, message);
5555 * Core handler for mesh network traffic toward the owner of a tunnel
5557 * @param cls closure
5558 * @param message message
5559 * @param peer peer identity this notification is about
5560 * @param atsi performance data
5561 * @param atsi_count number of records in 'atsi'
5563 * @return GNUNET_OK to keep the connection open,
5564 * GNUNET_SYSERR to close it (signal serious error)
5567 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
5568 const struct GNUNET_MessageHeader *message,
5569 const struct GNUNET_ATS_Information *atsi,
5570 unsigned int atsi_count)
5572 struct GNUNET_MESH_ToOrigin *msg;
5573 struct GNUNET_PeerIdentity id;
5574 struct MeshPeerInfo *peer_info;
5575 struct MeshTunnel *t;
5579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
5581 size = ntohs (message->size);
5582 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
5583 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
5585 GNUNET_break_op (0);
5588 msg = (struct GNUNET_MESH_ToOrigin *) message;
5589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5590 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5591 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5595 /* TODO notify that we dont know this tunnel (whom)? */
5596 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5597 GNUNET_break_op (0);
5601 if (NULL != t->owner)
5604 struct GNUNET_MESH_ToOrigin *copy;
5606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5607 " it's for us! sending to clients...\n");
5608 /* TODO signature verification */
5609 memcpy (cbuf, message, size);
5610 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
5611 copy->tid = htonl (t->local_tid);
5612 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
5613 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
5614 ©->header, GNUNET_NO);
5615 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5619 " not for us, retransmitting...\n");
5621 peer_info = peer_info_get (&msg->oid);
5622 if (NULL == peer_info)
5624 /* unknown origin of tunnel */
5628 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5629 send_prebuilt_message (message, &id, t);
5630 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
5637 * Core handler for mesh network traffic point-to-point acks.
5639 * @param cls closure
5640 * @param message message
5641 * @param peer peer identity this notification is about
5642 * @param atsi performance data
5643 * @param atsi_count number of records in 'atsi'
5645 * @return GNUNET_OK to keep the connection open,
5646 * GNUNET_SYSERR to close it (signal serious error)
5649 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5650 const struct GNUNET_MessageHeader *message,
5651 const struct GNUNET_ATS_Information *atsi,
5652 unsigned int atsi_count)
5654 struct GNUNET_MESH_ACK *msg;
5655 struct MeshTunnel *t;
5658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
5660 msg = (struct GNUNET_MESH_ACK *) message;
5662 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5666 /* TODO notify that we dont know this tunnel (whom)? */
5667 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
5668 GNUNET_break_op (0);
5671 ack = ntohl (msg->pid);
5673 /* Is this a forward or backward ACK? */
5674 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
5676 struct MeshTunnelChildInfo *cinfo;
5679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
5680 cinfo = tunnel_get_neighbor_fc (t, peer);
5681 cinfo->fwd_ack = ack;
5682 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5683 tunnel_unlock_fwd_queues (t);
5687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
5689 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5690 tunnel_unlock_bck_queue (t);
5697 * Core handler for path ACKs
5699 * @param cls closure
5700 * @param message message
5701 * @param peer peer identity this notification is about
5702 * @param atsi performance data
5703 * @param atsi_count number of records in 'atsi'
5705 * @return GNUNET_OK to keep the connection open,
5706 * GNUNET_SYSERR to close it (signal serious error)
5709 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5710 const struct GNUNET_MessageHeader *message,
5711 const struct GNUNET_ATS_Information *atsi,
5712 unsigned int atsi_count)
5714 struct GNUNET_MESH_PathACK *msg;
5715 struct GNUNET_PeerIdentity id;
5716 struct MeshPeerInfo *peer_info;
5717 struct MeshPeerPath *p;
5718 struct MeshTunnel *t;
5720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
5721 GNUNET_i2s (&my_full_id));
5722 msg = (struct GNUNET_MESH_PathACK *) message;
5723 t = tunnel_get (&msg->oid, ntohl(msg->tid));
5726 /* TODO notify that we don't know the tunnel */
5727 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5728 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
5729 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
5733 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5735 peer_info = peer_info_get (&msg->peer_id);
5736 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
5737 GNUNET_i2s (&msg->peer_id));
5738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
5741 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
5743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5744 "connect_by_string completed, stopping search\n");
5745 regex_cancel_search (t->regex_ctx);
5746 t->regex_ctx = NULL;
5749 /* Add paths to peers? */
5750 p = tree_get_path_to_peer (t->tree, peer_info->id);
5753 path_add_to_peers (p, GNUNET_YES);
5761 /* Message for us? */
5762 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
5764 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5765 if (NULL == t->owner)
5767 GNUNET_break_op (0);
5770 if (NULL != t->dht_get_type)
5772 GNUNET_DHT_get_stop (t->dht_get_type);
5773 t->dht_get_type = NULL;
5775 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
5777 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
5778 send_client_peer_connected (t, peer_info->id);
5783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5784 " not for us, retransmitting...\n");
5785 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5786 peer_info = peer_info_get (&msg->oid);
5787 if (NULL == peer_info)
5789 /* If we know the tunnel, we should DEFINITELY know the peer */
5793 send_prebuilt_message (message, &id, t);
5799 * Core handler for mesh keepalives.
5801 * @param cls closure
5802 * @param message message
5803 * @param peer peer identity this notification is about
5804 * @param atsi performance data
5805 * @param atsi_count number of records in 'atsi'
5806 * @return GNUNET_OK to keep the connection open,
5807 * GNUNET_SYSERR to close it (signal serious error)
5809 * TODO: Check who we got this from, to validate route.
5812 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
5813 const struct GNUNET_MessageHeader *message,
5814 const struct GNUNET_ATS_Information *atsi,
5815 unsigned int atsi_count)
5817 struct GNUNET_MESH_TunnelKeepAlive *msg;
5818 struct MeshTunnel *t;
5820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
5823 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
5824 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5828 /* TODO notify that we dont know that tunnel */
5829 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1, GNUNET_NO);
5830 GNUNET_break_op (0);
5834 tunnel_reset_timeout (t);
5836 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
5837 tunnel_send_multicast (t, message);
5844 * Functions to handle messages from core
5846 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
5847 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
5848 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
5849 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
5850 sizeof (struct GNUNET_MESH_PathBroken)},
5851 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
5852 sizeof (struct GNUNET_MESH_TunnelDestroy)},
5853 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
5854 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
5855 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
5856 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
5857 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
5858 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
5859 sizeof (struct GNUNET_MESH_ACK)},
5860 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
5861 sizeof (struct GNUNET_MESH_PathACK)},
5867 /******************************************************************************/
5868 /**************** MESH LOCAL HANDLER HELPERS ***********************/
5869 /******************************************************************************/
5872 * deregister_app: iterator for removing each application registered by a client
5874 * @param cls closure
5875 * @param key the hash of the application id (used to access the hashmap)
5876 * @param value the value stored at the key (client)
5878 * @return GNUNET_OK on success
5881 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
5883 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
5884 GNUNET_break (GNUNET_YES ==
5885 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
5891 * notify_client_connection_failure: notify a client that the connection to the
5892 * requested remote peer is not possible (for instance, no route found)
5893 * Function called when the socket is ready to queue more data. "buf" will be
5894 * NULL and "size" zero if the socket was closed for writing in the meantime.
5896 * @param cls closure
5897 * @param size number of bytes available in buf
5898 * @param buf where the callee should write the message
5899 * @return number of bytes written to buf
5902 notify_client_connection_failure (void *cls, size_t size, void *buf)
5905 struct MeshPeerInfo *peer_info;
5906 struct GNUNET_MESH_PeerControl *msg;
5907 struct GNUNET_PeerIdentity id;
5909 if (0 == size && NULL == buf)
5911 // TODO retry? cancel?
5915 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
5916 peer_info = (struct MeshPeerInfo *) cls;
5917 msg = (struct GNUNET_MESH_PeerControl *) buf;
5918 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
5919 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
5920 // msg->tunnel_id = htonl(peer_info->t->tid);
5921 GNUNET_PEER_resolve (peer_info->id, &id);
5922 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
5930 * Send keepalive packets for a peer
5932 * @param cls Closure (tunnel for which to send the keepalive).
5933 * @param tc Notification context.
5936 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5938 struct MeshTunnel *t = cls;
5939 struct GNUNET_MESH_TunnelKeepAlive *msg;
5940 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
5943 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
5944 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
5949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5950 "sending keepalive for tunnel %d\n", t->id.tid);
5952 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
5953 msg->header.size = htons (size);
5954 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
5955 msg->oid = my_full_id;
5956 msg->tid = htonl (t->id.tid);
5957 tunnel_send_multicast (t, &msg->header);
5959 t->path_refresh_task =
5960 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
5961 tunnel_reset_timeout(t);
5966 * Function to process paths received for a new peer addition. The recorded
5967 * paths form the initial tunnel, which can be optimized later.
5968 * Called on each result obtained for the DHT search.
5970 * @param cls closure
5971 * @param exp when will this value expire
5972 * @param key key of the result
5973 * @param get_path path of the get request
5974 * @param get_path_length lenght of get_path
5975 * @param put_path path of the put request
5976 * @param put_path_length length of the put_path
5977 * @param type type of the result
5978 * @param size number of bytes in data
5979 * @param data pointer to the result data
5981 * TODO: re-issue the request after certain time? cancel after X results?
5984 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5985 const struct GNUNET_HashCode * key,
5986 const struct GNUNET_PeerIdentity *get_path,
5987 unsigned int get_path_length,
5988 const struct GNUNET_PeerIdentity *put_path,
5989 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5990 size_t size, const void *data)
5992 struct MeshPathInfo *path_info = cls;
5993 struct MeshPeerPath *p;
5994 struct GNUNET_PeerIdentity pi;
5997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
5998 GNUNET_PEER_resolve (path_info->peer->id, &pi);
5999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
6001 p = path_build_from_dht (get_path, get_path_length, put_path,
6003 path_add_to_peers (p, GNUNET_NO);
6005 for (i = 0; i < path_info->peer->ntunnels; i++)
6007 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
6008 peer_info_connect (path_info->peer, path_info->t);
6016 * Function to process paths received for a new peer addition. The recorded
6017 * paths form the initial tunnel, which can be optimized later.
6018 * Called on each result obtained for the DHT search.
6020 * @param cls closure
6021 * @param exp when will this value expire
6022 * @param key key of the result
6023 * @param get_path path of the get request
6024 * @param get_path_length lenght of get_path
6025 * @param put_path path of the put request
6026 * @param put_path_length length of the put_path
6027 * @param type type of the result
6028 * @param size number of bytes in data
6029 * @param data pointer to the result data
6032 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6033 const struct GNUNET_HashCode * key,
6034 const struct GNUNET_PeerIdentity *get_path,
6035 unsigned int get_path_length,
6036 const struct GNUNET_PeerIdentity *put_path,
6037 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6038 size_t size, const void *data)
6040 const struct PBlock *pb = data;
6041 const struct GNUNET_PeerIdentity *pi = &pb->id;
6042 struct MeshTunnel *t = cls;
6043 struct MeshPeerInfo *peer_info;
6044 struct MeshPeerPath *p;
6046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
6047 if (size != sizeof (struct PBlock))
6049 GNUNET_break_op (0);
6052 if (ntohl(pb->type) != t->type)
6054 GNUNET_break_op (0);
6057 GNUNET_assert (NULL != t->owner);
6058 peer_info = peer_info_get (pi);
6059 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
6061 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
6063 p = path_build_from_dht (get_path, get_path_length, put_path,
6065 path_add_to_peers (p, GNUNET_NO);
6067 tunnel_add_peer (t, peer_info);
6068 peer_info_connect (peer_info, t);
6073 * Function to process DHT string to regex matching.
6074 * Called on each result obtained for the DHT search.
6076 * @param cls closure (search context)
6077 * @param exp when will this value expire
6078 * @param key key of the result
6079 * @param get_path path of the get request (not used)
6080 * @param get_path_length lenght of get_path (not used)
6081 * @param put_path path of the put request (not used)
6082 * @param put_path_length length of the put_path (not used)
6083 * @param type type of the result
6084 * @param size number of bytes in data
6085 * @param data pointer to the result data
6088 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6089 const struct GNUNET_HashCode * key,
6090 const struct GNUNET_PeerIdentity *get_path,
6091 unsigned int get_path_length,
6092 const struct GNUNET_PeerIdentity *put_path,
6093 unsigned int put_path_length,
6094 enum GNUNET_BLOCK_Type type,
6095 size_t size, const void *data)
6097 const struct MeshRegexAccept *block = data;
6098 struct MeshRegexSearchContext *ctx = cls;
6099 struct MeshRegexSearchInfo *info = ctx->info;
6100 struct MeshPeerPath *p;
6101 struct MeshPeerInfo *peer_info;
6103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
6104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
6106 peer_info = peer_info_get(&block->id);
6107 p = path_build_from_dht (get_path, get_path_length, put_path,
6109 path_add_to_peers (p, GNUNET_NO);
6112 tunnel_add_peer (info->t, peer_info);
6113 peer_info_connect (peer_info, info->t);
6114 if (0 == info->peer)
6116 info->peer = peer_info->id;
6120 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
6123 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
6124 ®ex_connect_timeout,
6132 * Function to process DHT string to regex matching.
6133 * Called on each result obtained for the DHT search.
6135 * @param cls closure (search context)
6136 * @param exp when will this value expire
6137 * @param key key of the result
6138 * @param get_path path of the get request (not used)
6139 * @param get_path_length lenght of get_path (not used)
6140 * @param put_path path of the put request (not used)
6141 * @param put_path_length length of the put_path (not used)
6142 * @param type type of the result
6143 * @param size number of bytes in data
6144 * @param data pointer to the result data
6146 * TODO: re-issue the request after certain time? cancel after X results?
6149 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6150 const struct GNUNET_HashCode * key,
6151 const struct GNUNET_PeerIdentity *get_path,
6152 unsigned int get_path_length,
6153 const struct GNUNET_PeerIdentity *put_path,
6154 unsigned int put_path_length,
6155 enum GNUNET_BLOCK_Type type,
6156 size_t size, const void *data)
6158 const struct MeshRegexBlock *block = data;
6159 struct MeshRegexSearchContext *ctx = cls;
6160 struct MeshRegexSearchInfo *info = ctx->info;
6164 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6165 "DHT GET STRING RETURNED RESULTS\n");
6166 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6167 " key: %s\n", GNUNET_h2s (key));
6169 copy = GNUNET_malloc (size);
6170 memcpy (copy, data, size);
6171 GNUNET_break (GNUNET_OK ==
6172 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
6173 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
6174 len = ntohl (block->n_proof);
6176 char proof[len + 1];
6178 memcpy (proof, &block[1], len);
6180 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
6182 GNUNET_break_op (0);
6186 len = strlen (info->description);
6187 if (len == ctx->position) // String processed
6189 if (GNUNET_YES == ntohl (block->accepting))
6191 regex_find_path(key, ctx);
6195 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
6196 // FIXME REGEX this block not successful, wait for more? start timeout?
6201 regex_next_edge (block, size, ctx);
6206 /******************************************************************************/
6207 /********************* MESH LOCAL HANDLES **************************/
6208 /******************************************************************************/
6212 * Handler for client disconnection
6214 * @param cls closure
6215 * @param client identification of the client; NULL
6216 * for the last call when the server is destroyed
6219 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
6221 struct MeshClient *c;
6222 struct MeshClient *next;
6225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
6228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
6234 if (c->handle != client)
6236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
6240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
6242 GNUNET_SERVER_client_drop (c->handle);
6243 c->shutting_down = GNUNET_YES;
6244 GNUNET_assert (NULL != c->own_tunnels);
6245 GNUNET_assert (NULL != c->incoming_tunnels);
6246 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
6247 &tunnel_destroy_iterator, c);
6248 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
6249 &tunnel_destroy_iterator, c);
6250 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
6251 &tunnel_destroy_iterator, c);
6252 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
6253 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
6254 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
6256 /* deregister clients applications */
6257 if (NULL != c->apps)
6259 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
6260 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
6262 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
6263 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
6265 GNUNET_SCHEDULER_cancel (announce_applications_task);
6266 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
6268 if (NULL != c->types)
6269 GNUNET_CONTAINER_multihashmap_destroy (c->types);
6270 for (i = 0; i < c->n_regex; i++)
6272 GNUNET_free (c->regexes[i]);
6274 GNUNET_free_non_null (c->regexes);
6275 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
6276 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
6278 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
6279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
6281 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
6284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
6290 * Handler for new clients
6292 * @param cls closure
6293 * @param client identification of the client
6294 * @param message the actual message, which includes messages the client wants
6297 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
6298 const struct GNUNET_MessageHeader *message)
6300 struct GNUNET_MESH_ClientConnect *cc_msg;
6301 struct MeshClient *c;
6302 GNUNET_MESH_ApplicationType *a;
6309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
6310 /* Check data sanity */
6311 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
6312 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
6313 ntypes = ntohs (cc_msg->types);
6314 napps = ntohs (cc_msg->applications);
6316 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
6319 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6323 /* Create new client structure */
6324 c = GNUNET_malloc (sizeof (struct MeshClient));
6325 c->id = next_client_id++;
6326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
6328 GNUNET_SERVER_client_keep (client);
6329 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
6332 GNUNET_MESH_ApplicationType at;
6333 struct GNUNET_HashCode hc;
6335 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
6336 for (i = 0; i < napps; i++)
6339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
6340 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
6341 /* store in clients hashmap */
6342 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
6343 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6344 /* store in global hashmap, for announcements */
6345 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
6346 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6348 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
6349 announce_applications_task =
6350 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
6356 struct GNUNET_HashCode hc;
6358 t = (uint16_t *) & a[napps];
6359 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
6360 for (i = 0; i < ntypes; i++)
6363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
6364 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
6366 /* store in clients hashmap */
6367 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
6368 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6369 /* store in global hashmap */
6370 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
6371 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6374 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6375 " client has %u+%u subscriptions\n", napps, ntypes);
6377 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
6378 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6379 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6380 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
6381 GNUNET_SERVER_notification_context_add (nc, client);
6382 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
6384 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
6390 * Handler for clients announcing available services by a regular expression.
6392 * @param cls closure
6393 * @param client identification of the client
6394 * @param message the actual message, which includes messages the client wants
6397 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
6398 const struct GNUNET_MessageHeader *message)
6400 struct MeshClient *c;
6404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
6406 /* Sanity check for client registration */
6407 if (NULL == (c = client_get (client)))
6410 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6415 len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
6416 regex = GNUNET_malloc (len + 1);
6417 memcpy (regex, &message[1], len);
6419 GNUNET_array_append (c->regexes, c->n_regex, regex);
6420 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
6422 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
6428 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
6434 * Handler for requests of new tunnels
6436 * @param cls closure
6437 * @param client identification of the client
6438 * @param message the actual message
6441 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
6442 const struct GNUNET_MessageHeader *message)
6444 struct GNUNET_MESH_TunnelMessage *t_msg;
6445 struct MeshTunnel *t;
6446 struct MeshClient *c;
6447 MESH_TunnelNumber tid;
6449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
6451 /* Sanity check for client registration */
6452 if (NULL == (c = client_get (client)))
6455 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6460 /* Message sanity check */
6461 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6464 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6468 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6469 /* Sanity check for tunnel numbering */
6470 tid = ntohl (t_msg->tunnel_id);
6471 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
6474 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6477 /* Sanity check for duplicate tunnel IDs */
6478 if (NULL != tunnel_get_by_local_id (c, tid))
6481 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6485 while (NULL != tunnel_get_by_pi (myid, next_tid))
6486 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6487 t = tunnel_new (myid, next_tid++, c, tid);
6490 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
6492 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6495 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
6497 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
6498 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
6500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
6501 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6507 * Handler for requests of deleting tunnels
6509 * @param cls closure
6510 * @param client identification of the client
6511 * @param message the actual message
6514 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
6515 const struct GNUNET_MessageHeader *message)
6517 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6518 struct MeshClient *c;
6519 struct MeshTunnel *t;
6520 MESH_TunnelNumber tid;
6522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6523 "Got a DESTROY TUNNEL from client!\n");
6525 /* Sanity check for client registration */
6526 if (NULL == (c = client_get (client)))
6529 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6534 /* Message sanity check */
6535 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6538 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6542 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6544 /* Retrieve tunnel */
6545 tid = ntohl (tunnel_msg->tunnel_id);
6546 t = tunnel_get_by_local_id(c, tid);
6549 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6551 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6554 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6556 client_ignore_tunnel (c, t);
6558 // TODO: when to destroy incoming tunnel?
6559 if (t->nclients == 0)
6561 GNUNET_assert (GNUNET_YES ==
6562 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
6564 GNUNET_assert (GNUNET_YES ==
6565 GNUNET_CONTAINER_multihashmap_remove (t->peers,
6566 &my_full_id.hashPubKey,
6570 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6573 send_client_tunnel_disconnect(t, c);
6574 client_delete_tunnel(c, t);
6576 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
6578 tunnel_send_destroy (t);
6579 t->destroy = GNUNET_YES;
6580 // The tunnel will be destroyed when the last message is transmitted.
6581 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6587 * Handler for requests of seeting tunnel's speed.
6589 * @param cls Closure (unused).
6590 * @param client Identification of the client.
6591 * @param message The actual message.
6594 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
6595 const struct GNUNET_MessageHeader *message)
6597 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6598 struct MeshClient *c;
6599 struct MeshTunnel *t;
6600 MESH_TunnelNumber tid;
6602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6603 "Got a SPEED request from client!\n");
6605 /* Sanity check for client registration */
6606 if (NULL == (c = client_get (client)))
6609 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6613 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6615 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6617 /* Retrieve tunnel */
6618 tid = ntohl (tunnel_msg->tunnel_id);
6619 t = tunnel_get_by_local_id(c, tid);
6622 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
6624 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6628 switch (ntohs(message->type))
6630 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
6631 t->speed_min = GNUNET_YES;
6633 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
6634 t->speed_min = GNUNET_NO;
6639 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6644 * Handler for requests of seeting tunnel's buffering policy.
6646 * @param cls Closure (unused).
6647 * @param client Identification of the client.
6648 * @param message The actual message.
6651 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
6652 const struct GNUNET_MessageHeader *message)
6654 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6655 struct MeshClient *c;
6656 struct MeshTunnel *t;
6657 MESH_TunnelNumber tid;
6659 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6660 "Got a BUFFER request from client!\n");
6662 /* Sanity check for client registration */
6663 if (NULL == (c = client_get (client)))
6666 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6671 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6673 /* Retrieve tunnel */
6674 tid = ntohl (tunnel_msg->tunnel_id);
6675 t = tunnel_get_by_local_id(c, tid);
6678 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6680 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6684 switch (ntohs(message->type))
6686 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
6687 t->nobuffer = GNUNET_NO;
6689 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
6690 t->nobuffer = GNUNET_YES;
6696 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6701 * Handler for connection requests to new peers
6703 * @param cls closure
6704 * @param client identification of the client
6705 * @param message the actual message (PeerControl)
6708 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
6709 const struct GNUNET_MessageHeader *message)
6711 struct GNUNET_MESH_PeerControl *peer_msg;
6712 struct MeshPeerInfo *peer_info;
6713 struct MeshClient *c;
6714 struct MeshTunnel *t;
6715 MESH_TunnelNumber tid;
6717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
6718 /* Sanity check for client registration */
6719 if (NULL == (c = client_get (client)))
6722 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6725 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6727 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6729 /* Sanity check for message size */
6730 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6733 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6737 /* Tunnel exists? */
6738 tid = ntohl (peer_msg->tunnel_id);
6739 t = tunnel_get_by_local_id (c, tid);
6743 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6747 /* Does client own tunnel? */
6748 if (t->owner->handle != client)
6751 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
6755 GNUNET_i2s (&peer_msg->peer));
6756 peer_info = peer_info_get (&peer_msg->peer);
6758 tunnel_add_peer (t, peer_info);
6759 peer_info_connect (peer_info, t);
6761 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6767 * Handler for disconnection requests of peers in a tunnel
6769 * @param cls closure
6770 * @param client identification of the client
6771 * @param message the actual message (PeerControl)
6774 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
6775 const struct GNUNET_MessageHeader *message)
6777 struct GNUNET_MESH_PeerControl *peer_msg;
6778 struct MeshPeerInfo *peer_info;
6779 struct MeshClient *c;
6780 struct MeshTunnel *t;
6781 MESH_TunnelNumber tid;
6783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
6784 /* Sanity check for client registration */
6785 if (NULL == (c = client_get (client)))
6788 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6793 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6795 /* Sanity check for message size */
6796 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6799 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6803 /* Tunnel exists? */
6804 tid = ntohl (peer_msg->tunnel_id);
6805 t = tunnel_get_by_local_id (c, tid);
6809 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6814 /* Does client own tunnel? */
6815 if (t->owner->handle != client)
6818 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
6823 GNUNET_i2s (&peer_msg->peer));
6824 /* Is the peer in the tunnel? */
6826 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
6827 if (NULL == peer_info)
6830 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6834 /* Ok, delete peer from tunnel */
6835 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
6836 &peer_msg->peer.hashPubKey);
6838 send_destroy_path (t, peer_info->id);
6839 tunnel_delete_peer (t, peer_info->id);
6840 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6845 * Handler for blacklist requests of peers in a tunnel
6847 * @param cls closure
6848 * @param client identification of the client
6849 * @param message the actual message (PeerControl)
6851 * FIXME implement DHT block bloomfilter
6854 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
6855 const struct GNUNET_MessageHeader *message)
6857 struct GNUNET_MESH_PeerControl *peer_msg;
6858 struct MeshClient *c;
6859 struct MeshTunnel *t;
6860 MESH_TunnelNumber tid;
6862 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
6863 /* Sanity check for client registration */
6864 if (NULL == (c = client_get (client)))
6867 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6872 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6874 /* Sanity check for message size */
6875 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6878 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6882 /* Tunnel exists? */
6883 tid = ntohl (peer_msg->tunnel_id);
6884 t = tunnel_get_by_local_id (c, tid);
6888 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6893 GNUNET_array_append(t->blacklisted, t->nblacklisted,
6894 GNUNET_PEER_intern(&peer_msg->peer));
6899 * Handler for unblacklist requests of peers in a tunnel
6901 * @param cls closure
6902 * @param client identification of the client
6903 * @param message the actual message (PeerControl)
6906 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
6907 const struct GNUNET_MessageHeader *message)
6909 struct GNUNET_MESH_PeerControl *peer_msg;
6910 struct MeshClient *c;
6911 struct MeshTunnel *t;
6912 MESH_TunnelNumber tid;
6916 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
6917 /* Sanity check for client registration */
6918 if (NULL == (c = client_get (client)))
6921 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6924 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6926 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6928 /* Sanity check for message size */
6929 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6932 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6936 /* Tunnel exists? */
6937 tid = ntohl (peer_msg->tunnel_id);
6938 t = tunnel_get_by_local_id (c, tid);
6942 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6947 /* if peer is not known, complain */
6948 pid = GNUNET_PEER_search (&peer_msg->peer);
6955 /* search and remove from list */
6956 for (i = 0; i < t->nblacklisted; i++)
6958 if (t->blacklisted[i] == pid)
6960 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
6961 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
6966 /* if peer hasn't been blacklisted, complain */
6972 * Handler for connection requests to new peers by type
6974 * @param cls closure
6975 * @param client identification of the client
6976 * @param message the actual message (ConnectPeerByType)
6979 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
6980 const struct GNUNET_MessageHeader *message)
6982 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
6983 struct MeshClient *c;
6984 struct MeshTunnel *t;
6985 struct GNUNET_HashCode hash;
6986 MESH_TunnelNumber tid;
6988 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
6989 /* Sanity check for client registration */
6990 if (NULL == (c = client_get (client)))
6993 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6998 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
7000 /* Sanity check for message size */
7001 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
7002 ntohs (connect_msg->header.size))
7005 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7009 /* Tunnel exists? */
7010 tid = ntohl (connect_msg->tunnel_id);
7011 t = tunnel_get_by_local_id (c, tid);
7015 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7019 /* Does client own tunnel? */
7020 if (t->owner->handle != client)
7023 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7027 /* Do WE have the service? */
7028 t->type = ntohl (connect_msg->type);
7029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
7030 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
7031 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
7034 /* Yes! Fast forward, add ourselves to the tunnel and send the
7035 * good news to the client, and alert the destination client of
7036 * an incoming tunnel.
7038 * FIXME send a path create to self, avoid code duplication
7040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
7041 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
7042 peer_info_get (&my_full_id),
7043 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
7046 send_client_peer_connected (t, myid);
7047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
7048 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7050 t->local_tid_dest = next_local_tid++;
7051 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
7052 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
7053 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7057 /* Ok, lets find a peer offering the service */
7058 if (NULL != t->dht_get_type)
7060 GNUNET_DHT_get_stop (t->dht_get_type);
7062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
7063 GNUNET_h2s (&hash));
7065 GNUNET_DHT_get_start (dht_handle,
7066 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
7068 dht_replication_level,
7069 GNUNET_DHT_RO_RECORD_ROUTE |
7070 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7072 &dht_get_type_handler, t);
7074 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7080 * Handler for connection requests to new peers by a string service description.
7082 * @param cls closure
7083 * @param client identification of the client
7084 * @param message the actual message, which includes messages the client wants
7087 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
7088 const struct GNUNET_MessageHeader *message)
7090 struct GNUNET_MESH_ConnectPeerByString *msg;
7091 struct MeshRegexSearchContext *ctx;
7092 struct MeshRegexSearchInfo *info;
7093 struct GNUNET_DHT_GetHandle *get_h;
7094 struct GNUNET_HashCode key;
7095 struct MeshTunnel *t;
7096 struct MeshClient *c;
7097 MESH_TunnelNumber tid;
7101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7102 "Connect by string started\n");
7103 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
7104 size = htons (message->size);
7106 /* Sanity check for client registration */
7107 if (NULL == (c = client_get (client)))
7110 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7115 /* Message size sanity check */
7116 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
7119 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7123 /* Tunnel exists? */
7124 tid = ntohl (msg->tunnel_id);
7125 t = tunnel_get_by_local_id (c, tid);
7129 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7133 /* Does client own tunnel? */
7134 if (t->owner->handle != client)
7137 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7142 " on tunnel %s [%u]\n",
7143 GNUNET_i2s(&my_full_id),
7146 /* Only one connect_by_string allowed at the same time! */
7147 /* FIXME: allow more, return handle at api level to cancel, document */
7148 if (NULL != t->regex_ctx)
7151 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7155 /* Find string itself */
7156 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
7157 string = (const char *) &msg[1];
7159 /* Initialize context */
7160 size = GNUNET_REGEX_get_first_key(string, len, &key);
7161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7162 " consumed %u bits out of %u\n", size, len);
7163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7164 " looking for %s\n", GNUNET_h2s (&key));
7166 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
7168 info->description = GNUNET_malloc (len + 1);
7169 memcpy (info->description, string, len);
7170 info->description[len] = '\0';
7171 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32);
7172 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32);
7173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
7175 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
7176 ctx->position = size;
7180 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
7182 /* Start search in DHT */
7183 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
7184 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
7185 &key, /* key to search */
7186 dht_replication_level, /* replication level */
7187 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7188 NULL, /* xquery */ // FIXME BLOOMFILTER
7189 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
7190 &dht_get_string_handler, ctx);
7192 GNUNET_break (GNUNET_OK ==
7193 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
7196 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
7198 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
7204 * Handler for client traffic directed to one peer
7206 * @param cls closure
7207 * @param client identification of the client
7208 * @param message the actual message
7211 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
7212 const struct GNUNET_MessageHeader *message)
7214 struct MeshClient *c;
7215 struct MeshTunnel *t;
7216 struct MeshPeerInfo *pi;
7217 struct GNUNET_MESH_Unicast *data_msg;
7218 MESH_TunnelNumber tid;
7221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7222 "Got a unicast request from a client!\n");
7224 /* Sanity check for client registration */
7225 if (NULL == (c = client_get (client)))
7228 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7233 data_msg = (struct GNUNET_MESH_Unicast *) message;
7235 /* Sanity check for message size */
7236 size = ntohs (message->size);
7237 if (sizeof (struct GNUNET_MESH_Unicast) +
7238 sizeof (struct GNUNET_MessageHeader) > size)
7241 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7245 /* Tunnel exists? */
7246 tid = ntohl (data_msg->tid);
7247 t = tunnel_get_by_local_id (c, tid);
7251 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7255 /* Is it a local tunnel? Then, does client own the tunnel? */
7256 if (t->owner->handle != client)
7259 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7263 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
7264 &data_msg->destination.hashPubKey);
7265 /* Is the selected peer in the tunnel? */
7269 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7273 /* PID should be as expected */
7274 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7277 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7278 "Unicast PID, expected %u, got %u\n",
7279 t->fwd_pid + 1, ntohl (data_msg->pid));
7280 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7284 /* Ok, everything is correct, send the message
7285 * (pretend we got it from a mesh peer)
7288 /* Work around const limitation */
7289 char buf[ntohs (message->size)] GNUNET_ALIGN;
7290 struct GNUNET_MESH_Unicast *copy;
7292 copy = (struct GNUNET_MESH_Unicast *) buf;
7293 memcpy (buf, data_msg, size);
7294 copy->oid = my_full_id;
7295 copy->tid = htonl (t->id.tid);
7296 copy->ttl = htonl (default_ttl);
7297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7298 " calling generic handler...\n");
7299 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
7301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
7302 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7309 * Handler for client traffic directed to the origin
7311 * @param cls closure
7312 * @param client identification of the client
7313 * @param message the actual message
7316 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
7317 const struct GNUNET_MessageHeader *message)
7319 struct GNUNET_MESH_ToOrigin *data_msg;
7320 struct MeshTunnelClientInfo *clinfo;
7321 struct MeshClient *c;
7322 struct MeshTunnel *t;
7323 MESH_TunnelNumber tid;
7326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7327 "Got a ToOrigin request from a client!\n");
7328 /* Sanity check for client registration */
7329 if (NULL == (c = client_get (client)))
7332 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7337 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
7339 /* Sanity check for message size */
7340 size = ntohs (message->size);
7341 if (sizeof (struct GNUNET_MESH_ToOrigin) +
7342 sizeof (struct GNUNET_MessageHeader) > size)
7345 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7349 /* Tunnel exists? */
7350 tid = ntohl (data_msg->tid);
7351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7352 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
7355 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7358 t = tunnel_get_by_local_id (c, tid);
7361 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7362 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7364 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7368 /* It should be sent by someone who has this as incoming tunnel. */
7369 if (GNUNET_NO == client_knows_tunnel (c, t))
7372 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7376 /* PID should be as expected */
7377 clinfo = tunnel_get_client_fc (t, c);
7378 if (ntohl (data_msg->pid) != clinfo->bck_pid + 1)
7381 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7382 "To Origin PID, expected %u, got %u\n",
7383 clinfo->bck_pid + 1,
7384 ntohl (data_msg->pid));
7385 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7389 /* Ok, everything is correct, send the message
7390 * (pretend we got it from a mesh peer)
7394 char buf[ntohs (message->size)] GNUNET_ALIGN;
7395 struct GNUNET_MESH_ToOrigin *copy;
7397 /* Work around const limitation */
7398 copy = (struct GNUNET_MESH_ToOrigin *) buf;
7399 memcpy (buf, data_msg, size);
7400 GNUNET_PEER_resolve (t->id.oid, ©->oid);
7401 copy->tid = htonl (t->id.tid);
7402 copy->ttl = htonl (default_ttl);
7403 if (ntohl (copy->pid) != (t->bck_pid + 1))
7406 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7407 "To Origin PID, expected %u, got %u\n",
7413 copy->sender = my_full_id;
7414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7415 " calling generic handler...\n");
7416 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
7418 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7425 * Handler for client traffic directed to all peers in a tunnel
7427 * @param cls closure
7428 * @param client identification of the client
7429 * @param message the actual message
7432 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
7433 const struct GNUNET_MessageHeader *message)
7435 struct MeshClient *c;
7436 struct MeshTunnel *t;
7437 struct GNUNET_MESH_Multicast *data_msg;
7438 MESH_TunnelNumber tid;
7440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7441 "Got a multicast request from a client!\n");
7443 /* Sanity check for client registration */
7444 if (NULL == (c = client_get (client)))
7447 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7450 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7452 data_msg = (struct GNUNET_MESH_Multicast *) message;
7454 /* Sanity check for message size */
7455 if (sizeof (struct GNUNET_MESH_Multicast) +
7456 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
7459 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7463 /* Tunnel exists? */
7464 tid = ntohl (data_msg->tid);
7465 t = tunnel_get_by_local_id (c, tid);
7469 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7470 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7472 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7476 /* Does client own tunnel? */
7477 if (t->owner->handle != client)
7480 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7484 /* PID should be as expected */
7485 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7488 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7489 "Multicast PID, expected %u, got %u\n",
7490 t->fwd_pid + 1, ntohl (data_msg->pid));
7491 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7496 char buf[ntohs (message->size)] GNUNET_ALIGN;
7497 struct GNUNET_MESH_Multicast *copy;
7499 copy = (struct GNUNET_MESH_Multicast *) buf;
7500 memcpy (buf, message, ntohs (message->size));
7501 copy->oid = my_full_id;
7502 copy->tid = htonl (t->id.tid);
7503 copy->ttl = htonl (default_ttl);
7504 GNUNET_assert (ntohl (copy->pid) == (t->fwd_pid + 1));
7505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7506 " calling generic handler...\n");
7507 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
7510 GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
7516 * Handler for client's ACKs for payload traffic.
7518 * @param cls Closure (unused).
7519 * @param client Identification of the client.
7520 * @param message The actual message.
7523 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
7524 const struct GNUNET_MessageHeader *message)
7526 struct GNUNET_MESH_LocalAck *msg;
7527 struct MeshTunnel *t;
7528 struct MeshClient *c;
7529 MESH_TunnelNumber tid;
7532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
7533 /* Sanity check for client registration */
7534 if (NULL == (c = client_get (client)))
7537 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7542 msg = (struct GNUNET_MESH_LocalAck *) message;
7544 /* Tunnel exists? */
7545 tid = ntohl (msg->tunnel_id);
7546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7547 t = tunnel_get_by_local_id (c, tid);
7551 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7552 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7553 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7557 ack = ntohl (msg->max_pid);
7558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
7560 /* Does client own tunnel? I.E: Is this and ACK for BCK traffic? */
7561 if (NULL != t->owner && t->owner->handle == client)
7563 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
7565 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7569 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
7570 tunnel_set_client_fwd_ack (t, c, ack);
7571 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7574 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7581 * Functions to handle messages from clients
7583 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
7584 {&handle_local_new_client, NULL,
7585 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
7586 {&handle_local_announce_regex, NULL,
7587 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
7588 {&handle_local_tunnel_create, NULL,
7589 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
7590 sizeof (struct GNUNET_MESH_TunnelMessage)},
7591 {&handle_local_tunnel_destroy, NULL,
7592 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
7593 sizeof (struct GNUNET_MESH_TunnelMessage)},
7594 {&handle_local_tunnel_speed, NULL,
7595 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
7596 sizeof (struct GNUNET_MESH_TunnelMessage)},
7597 {&handle_local_tunnel_speed, NULL,
7598 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
7599 sizeof (struct GNUNET_MESH_TunnelMessage)},
7600 {&handle_local_tunnel_buffer, NULL,
7601 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
7602 sizeof (struct GNUNET_MESH_TunnelMessage)},
7603 {&handle_local_tunnel_buffer, NULL,
7604 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
7605 sizeof (struct GNUNET_MESH_TunnelMessage)},
7606 {&handle_local_connect_add, NULL,
7607 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
7608 sizeof (struct GNUNET_MESH_PeerControl)},
7609 {&handle_local_connect_del, NULL,
7610 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
7611 sizeof (struct GNUNET_MESH_PeerControl)},
7612 {&handle_local_blacklist, NULL,
7613 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
7614 sizeof (struct GNUNET_MESH_PeerControl)},
7615 {&handle_local_unblacklist, NULL,
7616 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
7617 sizeof (struct GNUNET_MESH_PeerControl)},
7618 {&handle_local_connect_by_type, NULL,
7619 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
7620 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
7621 {&handle_local_connect_by_string, NULL,
7622 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
7623 {&handle_local_unicast, NULL,
7624 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
7625 {&handle_local_to_origin, NULL,
7626 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
7627 {&handle_local_multicast, NULL,
7628 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
7629 {&handle_local_ack, NULL,
7630 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
7631 sizeof (struct GNUNET_MESH_LocalAck)},
7637 * To be called on core init/fail.
7639 * @param cls service closure
7640 * @param server handle to the server for this service
7641 * @param identity the public identity of this peer
7644 core_init (void *cls, struct GNUNET_CORE_Handle *server,
7645 const struct GNUNET_PeerIdentity *identity)
7648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
7649 core_handle = server;
7650 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
7653 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
7654 GNUNET_SCHEDULER_shutdown (); // Try gracefully
7656 GNUNET_abort(); // Try harder
7663 * Method called whenever a given peer connects.
7665 * @param cls closure
7666 * @param peer peer identity this notification is about
7667 * @param atsi performance data for the connection
7668 * @param atsi_count number of records in 'atsi'
7671 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
7672 const struct GNUNET_ATS_Information *atsi,
7673 unsigned int atsi_count)
7675 struct MeshPeerInfo *peer_info;
7676 struct MeshPeerPath *path;
7678 DEBUG_CONN ("Peer connected\n");
7679 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
7680 peer_info = peer_info_get (peer);
7681 if (myid == peer_info->id)
7683 DEBUG_CONN (" (self)\n");
7688 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
7690 path = path_new (2);
7691 path->peers[0] = myid;
7692 path->peers[1] = peer_info->id;
7693 GNUNET_PEER_change_rc (myid, 1);
7694 GNUNET_PEER_change_rc (peer_info->id, 1);
7695 peer_info_add_path (peer_info, path, GNUNET_YES);
7696 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
7702 * Method called whenever a peer disconnects.
7704 * @param cls closure
7705 * @param peer peer identity this notification is about
7708 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
7710 struct MeshPeerInfo *pi;
7711 struct MeshPeerQueue *q;
7712 struct MeshPeerQueue *n;
7714 DEBUG_CONN ("Peer disconnected\n");
7715 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
7727 /* try to reroute this traffic instead */
7728 queue_destroy(q, GNUNET_YES);
7732 peer_info_remove_path (pi, pi->id, myid);
7735 DEBUG_CONN (" (self)\n");
7737 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
7742 /******************************************************************************/
7743 /************************ MAIN FUNCTIONS ****************************/
7744 /******************************************************************************/
7747 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
7749 * @param cls closure
7750 * @param key current key code
7751 * @param value value in the hash map
7752 * @return GNUNET_YES if we should continue to iterate,
7756 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
7758 struct MeshTunnel *t = value;
7765 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
7767 * @param cls closure
7768 * @param key current key code
7769 * @param value value in the hash map
7770 * @return GNUNET_YES if we should continue to iterate,
7774 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
7776 struct MeshPeerInfo *p = value;
7777 struct MeshPeerQueue *q;
7778 struct MeshPeerQueue *n;
7786 queue_destroy(q, GNUNET_YES);
7790 peer_info_destroy (p);
7796 * Task run during shutdown.
7802 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
7804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
7806 if (core_handle != NULL)
7808 GNUNET_CORE_disconnect (core_handle);
7813 GNUNET_CRYPTO_rsa_key_create_stop (keygen);
7816 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
7817 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
7818 if (dht_handle != NULL)
7820 GNUNET_DHT_disconnect (dht_handle);
7825 GNUNET_SERVER_notification_context_destroy (nc);
7828 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
7830 GNUNET_SCHEDULER_cancel (announce_id_task);
7831 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
7833 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
7838 * Callback for hostkey read/generation
7841 * @param pk the private key
7842 * @param emsg error message
7845 key_generation_cb (void *cls,
7846 struct GNUNET_CRYPTO_RsaPrivateKey *pk,
7849 struct MeshPeerInfo *peer;
7850 struct MeshPeerPath *p;
7855 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7856 _("Mesh service could not access hostkey. Exiting.\n"));
7857 GNUNET_SCHEDULER_shutdown ();
7860 my_private_key = pk;
7861 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7862 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
7863 &my_full_id.hashPubKey);
7864 myid = GNUNET_PEER_intern (&my_full_id);
7865 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7866 "Mesh for peer [%s] starting\n",
7867 GNUNET_i2s(&my_full_id));
7869 // transport_handle = GNUNET_TRANSPORT_connect(c,
7879 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
7882 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
7883 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
7884 GNUNET_SERVER_disconnect_notify (server_handle,
7885 &handle_local_client_disconnect, NULL);
7889 clients_tail = NULL;
7892 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
7893 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
7895 /* Create a peer_info for the local peer */
7896 peer = peer_info_get (&my_full_id);
7899 GNUNET_PEER_change_rc (myid, 1);
7900 peer_info_add_path (peer, p, GNUNET_YES);
7901 GNUNET_SERVER_resume (server_handle);
7902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
7907 * Process mesh requests.
7909 * @param cls closure
7910 * @param server the initialized server
7911 * @param c configuration to use
7914 run (void *cls, struct GNUNET_SERVER_Handle *server,
7915 const struct GNUNET_CONFIGURATION_Handle *c)
7919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
7920 server_handle = server;
7921 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
7922 NULL, /* Closure passed to MESH functions */
7923 &core_init, /* Call core_init once connected */
7924 &core_connect, /* Handle connects */
7925 &core_disconnect, /* remove peers on disconnects */
7926 NULL, /* Don't notify about all incoming messages */
7927 GNUNET_NO, /* For header only in notification */
7928 NULL, /* Don't notify about all outbound messages */
7929 GNUNET_NO, /* For header-only out notification */
7930 core_handlers); /* Register these handlers */
7932 if (core_handle == NULL)
7935 GNUNET_SCHEDULER_shutdown ();
7940 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
7943 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7945 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7947 GNUNET_SCHEDULER_shutdown ();
7952 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
7953 &refresh_path_time))
7955 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7957 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7958 "refresh path time");
7959 GNUNET_SCHEDULER_shutdown ();
7964 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
7965 &app_announce_time))
7967 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7969 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7970 "app announce time");
7971 GNUNET_SCHEDULER_shutdown ();
7976 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
7979 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7981 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7982 "id announce time");
7983 GNUNET_SCHEDULER_shutdown ();
7988 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
7989 &unacknowledged_wait_time))
7991 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7993 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7994 "unacknowledged wait time");
7995 GNUNET_SCHEDULER_shutdown ();
8000 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
8003 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8005 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
8007 GNUNET_SCHEDULER_shutdown ();
8012 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
8015 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8017 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
8019 GNUNET_SCHEDULER_shutdown ();
8024 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
8027 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8029 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
8031 GNUNET_SCHEDULER_shutdown ();
8036 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
8039 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8041 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
8047 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
8048 &dht_replication_level))
8050 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8052 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
8053 "dht replication level", 10);
8054 dht_replication_level = 10;
8057 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
8058 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
8059 peers = GNUNET_CONTAINER_multihashmap_create (32);
8060 applications = GNUNET_CONTAINER_multihashmap_create (32);
8061 types = GNUNET_CONTAINER_multihashmap_create (32);
8063 dht_handle = GNUNET_DHT_connect (c, 64);
8064 if (NULL == dht_handle)
8068 stats = GNUNET_STATISTICS_create ("mesh", c);
8070 GNUNET_SERVER_suspend (server_handle);
8071 /* Scheduled the task to clean up when shutdown is called */
8072 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
8074 keygen = GNUNET_CRYPTO_rsa_key_create_start (keyfile, &key_generation_cb, NULL);
8075 GNUNET_free (keyfile);
8080 * The main function for the mesh service.
8082 * @param argc number of arguments from the command line
8083 * @param argv command line arguments
8084 * @return 0 ok, 1 on error
8087 main (int argc, char *const *argv)
8091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
8094 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
8096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
8100 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8101 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
8102 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);