2 This file is part of GNUnet.
3 (C) 2001-2012 Christian Grothoff (and other contributing authors)
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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)
39 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
40 * - partial disconnect reporting -- same as error reporting?
42 * - relay corking down to core
43 * - set ttl relative to tree depth
44 * - Add data ACK count in path ACK
45 * - Make common GNUNET_MESH_Data header for unicast, to_orig, multicast
51 #include "mesh_protocol.h"
52 #include "mesh_tunnel_tree.h"
53 #include "block_mesh.h"
54 #include "mesh_block_lib.h"
55 #include "gnunet_dht_service.h"
56 #include "gnunet_statistics_service.h"
57 #include "gnunet_regex_lib.h"
59 #define MESH_BLOOM_SIZE 128
61 #define MESH_DEBUG_DHT GNUNET_NO
62 #define MESH_DEBUG_CONNECTION GNUNET_NO
63 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
65 #if MESH_DEBUG_CONNECTION
66 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
68 #define DEBUG_CONN(...)
72 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
74 #define DEBUG_DHT(...)
81 struct timespec __mesh_start;
82 struct timespec __mesh_end;
83 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
84 #define INTERVAL_END \
86 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
87 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
88 if (__diff < 0) __diff += 1000000000;\
92 #define INTERVAL_SHOW \
94 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
96 #define INTERVAL_START
101 /******************************************************************************/
102 /************************ DATA STRUCTURES ****************************/
103 /******************************************************************************/
105 /** FWD declaration */
111 * Struct representing a piece of data being sent to other peers
115 /** Tunnel it belongs to. */
116 struct MeshTunnel *t;
118 /** How many remaining neighbors still hav't got it. */
119 unsigned int reference_counter;
121 /** How many remaining neighbors we need to send this to. */
122 unsigned int total_out;
124 /** Size of the data. */
133 * Struct containing info about a queued transmission to this peer
140 struct MeshPeerQueue *next;
145 struct MeshPeerQueue *prev;
148 * Peer this transmission is directed to.
150 struct MeshPeerInfo *peer;
153 * Tunnel this message belongs to.
155 struct MeshTunnel *tunnel;
158 * Pointer to info stucture used as cls.
168 * Size of the message
175 * Struct to store regex information announced by clients.
177 struct MeshRegexDescriptor
180 * Regular expression itself.
185 * How many characters per edge can we squeeze?
187 uint16_t compression;
191 * Struct containing all info possibly needed to build a package when called
194 struct MeshTransmissionDescriptor
196 /** ID of the tunnel this packet travels in */
197 struct MESH_TunnelID *origin;
199 /** Who was this message being sent to */
200 struct MeshPeerInfo *peer;
202 /** Ultimate destination of the packet */
203 GNUNET_PEER_Id destination;
205 /** Data descriptor */
206 struct MeshData* mesh_data;
211 * Struct containing all information regarding a given peer
221 * Last time we heard from this peer
223 struct GNUNET_TIME_Absolute last_contact;
226 * Task handler for delayed connect task;
228 GNUNET_SCHEDULER_TaskIdentifier connect_task;
231 * Number of attempts to reconnect so far
233 int n_reconnect_attempts;
236 * Paths to reach the peer, ordered by ascending hop count
238 struct MeshPeerPath *path_head;
241 * Paths to reach the peer, ordered by ascending hop count
243 struct MeshPeerPath *path_tail;
246 * Handle to stop the DHT search for a path to this peer
248 struct GNUNET_DHT_GetHandle *dhtget;
251 * Closure given to the DHT GET
253 struct MeshPathInfo *dhtgetcls;
256 * Array of tunnels this peer participates in
257 * (most probably a small amount, therefore not a hashmap)
258 * When the path to the peer changes, notify these tunnels to let them
259 * re-adjust their path trees.
261 struct MeshTunnel **tunnels;
264 * Number of tunnels this peers participates in
266 unsigned int ntunnels;
269 * Transmission queue to core DLL head
271 struct MeshPeerQueue *queue_head;
274 * Transmission queue to core DLL tail
276 struct MeshPeerQueue *queue_tail;
279 * How many messages are in the queue to this peer.
281 unsigned int queue_n;
284 * Handle to for queued transmissions
286 struct GNUNET_CORE_TransmitHandle *core_transmit;
291 * Globally unique tunnel identification (owner + number)
292 * DO NOT USE OVER THE NETWORK
297 * Node that owns the tunnel
302 * Tunnel number to differentiate all the tunnels owned by the node oid
303 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
305 MESH_TunnelNumber tid;
310 * Struct containing all information regarding a tunnel
311 * For an intermediate node the improtant info used will be:
312 * - id Tunnel unique identification
313 * - paths[0] To know where to send it next
314 * - metainfo: ready, speeds, accounting
321 struct MESH_TunnelID id;
324 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
326 MESH_TunnelNumber local_tid;
329 * Local tunnel number for local destination clients (incoming number)
330 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
333 MESH_TunnelNumber local_tid_dest;
336 * Is the speed on the tunnel limited to the slowest peer?
341 * Is the tunnel bufferless (minimum latency)?
346 * Packet ID of the last fwd packet seen (sent/retransmitted/received).
351 * Packet ID of the last bck packet sent (unique counter per hop).
356 * SKIP value for this tunnel.
361 * MeshTunnelFlowControlInfo of all children, indexed by GNUNET_PEER_Id.
362 * Contains the Flow Control info: FWD ACK value received,
363 * last BCK ACK sent, PID and SKIP values.
365 struct GNUNET_CONTAINER_MultiHashMap *children_fc;
368 * Last ACK sent towards the origin (for traffic towards leaf node).
370 uint32_t last_fwd_ack;
373 * BCK ACK value received from the hop towards the owner of the tunnel,
374 * (previous node / owner): up to what message PID can we sent back to him.
379 * How many messages are in the forward queue (towards leaves).
381 unsigned int fwd_queue_n;
384 * How many messages do we accept in the forward queue.
386 unsigned int fwd_queue_max;
389 * How many messages are in the backward queue (towards origin).
391 unsigned int bck_queue_n;
394 * How many messages do we accept in the backward queue.
396 unsigned int bck_queue_max;
399 * Task to poll peer in case of a stall.
401 GNUNET_SCHEDULER_TaskIdentifier fc_poll_bck;
404 * Last time the tunnel was used
406 struct GNUNET_TIME_Absolute timestamp;
409 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
410 * containing peers added by id or by type, not intermediate peers.
412 struct GNUNET_CONTAINER_MultiHashMap *peers;
415 * Number of peers that are connected and potentially ready to receive data
417 unsigned int peers_ready;
420 * Number of peers that have been added to the tunnel
422 unsigned int peers_total;
425 * Client owner of the tunnel, if any
427 struct MeshClient *owner;
430 * Clients that have been informed about and want to stay in the tunnel.
432 struct MeshClient **clients;
435 * Flow control info for each client.
437 struct MeshTunnelFlowControlInfo *clients_fc;
440 * Number of elements in clients/clients_fc
442 unsigned int nclients;
445 * Clients that have been informed but requested to leave the tunnel.
447 struct MeshClient **ignore;
450 * Number of elements in clients
452 unsigned int nignore;
457 GNUNET_PEER_Id *blacklisted;
460 * Number of elements in blacklisted
462 unsigned int nblacklisted;
465 * Bloomfilter (for peer identities) to stop circular routes
467 char bloomfilter[MESH_BLOOM_SIZE];
472 struct MeshTunnelTree *tree;
475 * Application type we are looking for in this tunnel
477 GNUNET_MESH_ApplicationType type;
480 * Used to search peers offering a service
482 struct GNUNET_DHT_GetHandle *dht_get_type;
485 * Initial context of the regex search for a connect_by_string
487 struct MeshRegexSearchContext *regex_ctx;
490 * Task to keep the used paths alive
492 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
495 * Task to destroy the tunnel after timeout
497 * FIXME: merge the two? a tunnel will have either
498 * a path refresh OR a timeout, never both!
500 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
503 * Flag to signal the destruction of the tunnel.
504 * If this is set GNUNET_YES the tunnel will be destroyed
505 * when the queue is empty.
512 * Flow control info about a node in a tunnel. The node can be a local client
515 struct MeshTunnelFlowControlInfo
518 * Peer info of the node, NULL if local client.
520 struct MeshPeerInfo *peer;
523 * Client info of the node, NULL if remote peer.
525 struct MeshClient *client;
543 * Maximum PID they allowed us to send (FWD ACK received).
548 * Maximum PID we allowed them to send (BCK ACK sent).
553 * Circular buffer pointing to MeshPeerQueue elements for all
554 * payload traffic going to this node.
555 * Size determined by the tunnel queue size (@c t->fwd_queue_max).
557 struct MeshPeerQueue **send_buffer;
560 * Index of the oldest element in the send_buffer.
562 unsigned int send_buffer_start;
565 * How many elements are already in the buffer.
567 unsigned int send_buffer_n;
570 * Tunnel this info is about
572 struct MeshTunnel *t;
575 * Task to poll peer in case of a stall.
577 GNUNET_SCHEDULER_TaskIdentifier fc_poll;
582 * Info collected during iteration of child nodes in order to get the ACK value
585 struct MeshTunnelChildIteratorContext
588 * Tunnel whose info is being collected.
590 struct MeshTunnel *t;
593 * Is this context initialized? Is the value in max_child_ack valid?
598 * Maximum child ACK so far.
600 uint32_t max_child_ack;
603 * Number of children nodes
605 unsigned int nchildren;
610 * Info needed to work with tunnel paths and peers
617 struct MeshTunnel *t;
620 * Neighbouring peer to whom we send the packet to
622 struct MeshPeerInfo *peer;
627 struct MeshPeerPath *path;
632 * Struct containing information about a client of the service
639 struct MeshClient *next;
644 struct MeshClient *prev;
647 * Tunnels that belong to this client, indexed by local id
649 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
652 * Tunnels this client has accepted, indexed by incoming local id
654 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
657 * Tunnels this client has rejected, indexed by incoming local id
659 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
661 * Handle to communicate with the client
663 struct GNUNET_SERVER_Client *handle;
666 * Applications that this client has claimed to provide
668 struct GNUNET_CONTAINER_MultiHashMap *apps;
671 * Messages that this client has declared interest in
673 struct GNUNET_CONTAINER_MultiHashMap *types;
676 * Whether the client is active or shutting down (don't send confirmations
677 * to a client that is shutting down.
682 * ID of the client, mainly for debug messages
687 * Regular expressions describing the services offered by this client.
689 struct MeshRegexDescriptor *regexes; // FIXME regex add timeout? API to remove a regex?
692 * Number of regular expressions in regexes.
694 unsigned int n_regex;
697 * Task to refresh all regular expresions in the DHT.
699 GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
705 * Struct to keep information of searches of services described by a regex
706 * using a user-provided string service description.
708 struct MeshRegexSearchInfo
711 * Which tunnel is this for
713 struct MeshTunnel *t;
716 * User provided description of the searched service.
721 * Part of the description already consumed by the search.
728 struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
731 * Results from running DHT GETs.
733 struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
736 * Contexts, for each running DHT GET. Free all on end of search.
738 struct MeshRegexSearchContext **contexts;
741 * Number of contexts (branches/steps in search).
743 unsigned int n_contexts;
746 * Peer that is connecting via connect_by_string. When connected, free ctx.
751 * Other peers that are found but not yet being connected to.
753 GNUNET_PEER_Id *peers;
756 * Number of elements in peers.
758 unsigned int n_peers;
761 * Next peer to try to connect to.
766 * Timeout for a connect attempt.
767 * When reached, try to connect to a different peer, if any. If not,
768 * try the same peer again.
770 GNUNET_SCHEDULER_TaskIdentifier timeout;
775 * Struct to keep state of running searches that have consumed a part of
778 struct MeshRegexSearchContext
781 * Part of the description already consumed by
782 * this particular search branch.
787 * Information about the search.
789 struct MeshRegexSearchInfo *info;
792 * We just want to look for one edge, the longer the better.
795 unsigned int longest_match;
798 * Destination hash of the longest match.
800 struct GNUNET_HashCode hash;
803 /******************************************************************************/
804 /************************ DEBUG FUNCTIONS ****************************/
805 /******************************************************************************/
809 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
810 * @param cls string to print
811 * @param success GNUNET_OK if the PUT was transmitted,
812 * GNUNET_NO on timeout,
813 * GNUNET_SYSERR on disconnect from service
814 * after the PUT message was transmitted
815 * (so we don't know if it was received or not)
820 mesh_debug (void *cls, int success)
824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
828 unsigned int debug_fwd_ack;
829 unsigned int debug_bck_ack;
833 /******************************************************************************/
834 /*********************** GLOBAL VARIABLES ****************************/
835 /******************************************************************************/
837 /************************** Configuration parameters **************************/
840 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
842 static struct GNUNET_TIME_Relative refresh_path_time;
845 * How often to PUT local application numbers in the DHT.
847 static struct GNUNET_TIME_Relative app_announce_time;
850 * How often to PUT own ID in the DHT.
852 static struct GNUNET_TIME_Relative id_announce_time;
855 * Maximum time allowed to connect to a peer found by string.
857 static struct GNUNET_TIME_Relative connect_timeout;
860 * Default TTL for payload packets.
862 static unsigned long long default_ttl;
865 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
867 static unsigned long long dht_replication_level;
870 * How many tunnels are we willing to maintain.
871 * Local tunnels are always allowed, even if there are more tunnels than max.
873 static unsigned long long max_tunnels;
876 * How many messages *in total* are we willing to queue, divided by number of
877 * tunnels to get tunnel queue size.
879 static unsigned long long max_msgs_queue;
882 /*************************** Static global variables **************************/
885 * Hostkey generation context
887 static struct GNUNET_CRYPTO_RsaKeyGenerationContext *keygen;
890 * DLL with all the clients, head.
892 static struct MeshClient *clients;
895 * DLL with all the clients, tail.
897 static struct MeshClient *clients_tail;
900 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
902 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
905 * Number of tunnels known.
907 static unsigned long long n_tunnels;
910 * Tunnels incoming, indexed by MESH_TunnelNumber
911 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
913 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
916 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
918 static struct GNUNET_CONTAINER_MultiHashMap *peers;
921 * Handle to communicate with transport
923 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
926 * Handle to communicate with core.
928 static struct GNUNET_CORE_Handle *core_handle;
933 static struct GNUNET_DHT_Handle *dht_handle;
938 static struct GNUNET_SERVER_Handle *server_handle;
941 * Handle to the statistics service.
943 static struct GNUNET_STATISTICS_Handle *stats;
946 * Notification context, to send messages to local clients.
948 static struct GNUNET_SERVER_NotificationContext *nc;
951 * Local peer own ID (memory efficient handle).
953 static GNUNET_PEER_Id myid;
956 * Local peer own ID (full value).
958 static struct GNUNET_PeerIdentity my_full_id;
963 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
968 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
971 * Tunnel ID for the next created tunnel (global tunnel number).
973 static MESH_TunnelNumber next_tid;
976 * Tunnel ID for the next incoming tunnel (local tunnel number).
978 static MESH_TunnelNumber next_local_tid;
981 * All application types provided by this peer.
983 static struct GNUNET_CONTAINER_MultiHashMap *applications;
986 * All message types clients of this peer are interested in.
988 static struct GNUNET_CONTAINER_MultiHashMap *types;
991 * Task to periodically announce provided applications.
993 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
996 * Task to periodically announce itself in the network.
998 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
1001 * Next ID to assign to a client.
1003 unsigned int next_client_id;
1006 /******************************************************************************/
1007 /*********************** DECLARATIONS **************************/
1008 /******************************************************************************/
1011 * Function to process paths received for a new peer addition. The recorded
1012 * paths form the initial tunnel, which can be optimized later.
1013 * Called on each result obtained for the DHT search.
1015 * @param cls closure
1016 * @param exp when will this value expire
1017 * @param key key of the result
1018 * @param type type of the result
1019 * @param size number of bytes in data
1020 * @param data pointer to the result data
1023 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1024 const struct GNUNET_HashCode * key,
1025 const struct GNUNET_PeerIdentity *get_path,
1026 unsigned int get_path_length,
1027 const struct GNUNET_PeerIdentity *put_path,
1028 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
1029 size_t size, const void *data);
1033 * Function to process DHT string to regex matching.
1034 * Called on each result obtained for the DHT search.
1036 * @param cls closure (search context)
1037 * @param exp when will this value expire
1038 * @param key key of the result
1039 * @param get_path path of the get request (not used)
1040 * @param get_path_length lenght of get_path (not used)
1041 * @param put_path path of the put request (not used)
1042 * @param put_path_length length of the put_path (not used)
1043 * @param type type of the result
1044 * @param size number of bytes in data
1045 * @param data pointer to the result data
1047 * TODO: re-issue the request after certain time? cancel after X results?
1050 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1051 const struct GNUNET_HashCode * key,
1052 const struct GNUNET_PeerIdentity *get_path,
1053 unsigned int get_path_length,
1054 const struct GNUNET_PeerIdentity *put_path,
1055 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
1056 size_t size, const void *data);
1060 * Function to process DHT string to regex matching.
1061 * Called on each result obtained for the DHT search.
1063 * @param cls closure (search context)
1064 * @param exp when will this value expire
1065 * @param key key of the result
1066 * @param get_path path of the get request (not used)
1067 * @param get_path_length lenght of get_path (not used)
1068 * @param put_path path of the put request (not used)
1069 * @param put_path_length length of the put_path (not used)
1070 * @param type type of the result
1071 * @param size number of bytes in data
1072 * @param data pointer to the result data
1075 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1076 const struct GNUNET_HashCode * key,
1077 const struct GNUNET_PeerIdentity *get_path,
1078 unsigned int get_path_length,
1079 const struct GNUNET_PeerIdentity *put_path,
1080 unsigned int put_path_length,
1081 enum GNUNET_BLOCK_Type type,
1082 size_t size, const void *data);
1086 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1087 * and insert it in the appropiate structures if the peer is not known yet.
1089 * @param peer Short identity of the peer.
1091 * @return Existing or newly created peer info.
1093 static struct MeshPeerInfo *
1094 peer_info_get_short (const GNUNET_PEER_Id peer);
1098 * Try to establish a new connection to this peer.
1099 * Use the best path for the given tunnel.
1100 * If the peer doesn't have any path to it yet, try to get one.
1101 * If the peer already has some path, send a CREATE PATH towards it.
1103 * @param peer PeerInfo of the peer.
1104 * @param t Tunnel for which to create the path, if possible.
1107 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
1111 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1112 * needed rescources.
1113 * If peer already exists, reevaluate shortest path and change if different.
1115 * @param t Tunnel we want to add a new peer to
1116 * @param peer PeerInfo of the peer being added
1120 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
1124 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1125 * that are no longer needed, as well as nodes of no longer reachable peers.
1126 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1128 * @param t Tunnel from which to remove the path.
1129 * @param peer Short id of the peer which should be removed.
1132 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
1136 * Search for a tunnel by global ID using full PeerIdentities.
1138 * @param oid owner of the tunnel.
1139 * @param tid global tunnel number.
1141 * @return tunnel handler, NULL if doesn't exist.
1143 static struct MeshTunnel *
1144 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
1148 * Delete an active client from the tunnel.
1154 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
1157 * Notify a tunnel that a connection has broken that affects at least
1158 * some of its peers.
1160 * @param t Tunnel affected.
1161 * @param p1 Peer that got disconnected from p2.
1162 * @param p2 Peer that got disconnected from p1.
1164 * @return Short ID of the peer disconnected (either p1 or p2).
1165 * 0 if the tunnel remained unaffected.
1167 static GNUNET_PEER_Id
1168 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1173 * Get the current ack value for a tunnel, for data going from root to leaves,
1174 * taking in account the tunnel mode and the status of all children and clients.
1178 * @return Maximum PID allowed.
1181 tunnel_get_fwd_ack (struct MeshTunnel *t);
1185 * Add a client to a tunnel, initializing all needed data structures.
1187 * @param t Tunnel to which add the client.
1188 * @param c Client which to add to the tunnel.
1191 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c);
1195 * Jump to the next edge, with the longest matching token.
1197 * @param block Block found in the DHT.
1198 * @param size Size of the block.
1199 * @param ctx Context of the search.
1201 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1204 regex_next_edge (const struct MeshRegexBlock *block,
1206 struct MeshRegexSearchContext *ctx);
1210 * Find a path to a peer that offers a regex servcie compatible
1211 * with a given string.
1213 * @param key The key of the accepting state.
1214 * @param ctx Context containing info about the string, tunnel, etc.
1217 regex_find_path (const struct GNUNET_HashCode *key,
1218 struct MeshRegexSearchContext *ctx);
1222 * @brief Queue and pass message to core when possible.
1224 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
1225 * and accounts for it. In case the queue is full, the message is dropped and
1228 * Otherwise, message is treated as internal and allowed to go regardless of
1231 * @param cls Closure (@c type dependant). It will be used by queue_send to
1232 * build the message to be sent if not already prebuilt.
1233 * @param type Type of the message, 0 for a raw message.
1234 * @param size Size of the message.
1235 * @param dst Neighbor to send message to.
1236 * @param t Tunnel this message belongs to.
1239 queue_add (void *cls, uint16_t type, size_t size,
1240 struct MeshPeerInfo *dst, struct MeshTunnel *t);
1244 * Free a transmission that was already queued with all resources
1245 * associated to the request.
1247 * @param queue Queue handler to cancel.
1248 * @param clear_cls Is it necessary to free associated cls?
1251 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1255 * @brief Get the next transmittable message from the queue.
1257 * This will be the head, except in the case of being a data packet
1258 * not allowed by the destination peer.
1260 * @param peer Destination peer.
1262 * @return The next viable MeshPeerQueue element to send to that peer.
1263 * NULL when there are no transmittable messages.
1265 struct MeshPeerQueue *
1266 queue_get_next (const struct MeshPeerInfo *peer);
1270 * Core callback to write a queued packet to core buffer
1272 * @param cls Closure (peer info).
1273 * @param size Number of bytes available in buf.
1274 * @param buf Where the to write the message.
1276 * @return number of bytes written to buf
1279 queue_send (void *cls, size_t size, void *buf);
1281 /******************************************************************************/
1282 /************************ ITERATORS ****************************/
1283 /******************************************************************************/
1286 * Iterator over found existing mesh regex blocks that match an ongoing search.
1288 * @param cls closure
1289 * @param key current key code
1290 * @param value value in the hash map
1291 * @return GNUNET_YES if we should continue to iterate,
1295 regex_result_iterator (void *cls,
1296 const struct GNUNET_HashCode * key,
1299 struct MeshRegexBlock *block = value;
1300 struct MeshRegexSearchContext *ctx = cls;
1302 if (GNUNET_YES == ntohl(block->accepting) &&
1303 ctx->position == strlen (ctx->info->description))
1305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
1306 regex_find_path (key, ctx);
1307 return GNUNET_YES; // We found an accept state!
1311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
1312 ctx->position, strlen(ctx->info->description),
1313 ntohl(block->accepting));
1316 regex_next_edge(block, SIZE_MAX, ctx);
1318 GNUNET_STATISTICS_update (stats, "# regex mesh blocks iterated", 1, GNUNET_NO);
1325 * Iterator over edges in a regex block retrieved from the DHT.
1327 * @param cls Closure (context of the search).
1328 * @param token Token that follows to next state.
1329 * @param len Lenght of token.
1330 * @param key Hash of next state.
1332 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1335 regex_edge_iterator (void *cls,
1338 const struct GNUNET_HashCode *key)
1340 struct MeshRegexSearchContext *ctx = cls;
1341 struct MeshRegexSearchInfo *info = ctx->info;
1345 GNUNET_STATISTICS_update (stats, "# regex edges iterated", 1, GNUNET_NO);
1347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
1348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
1349 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
1350 current = &info->description[ctx->position];
1351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
1352 current_len = strlen (info->description) - ctx->position;
1353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
1354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
1355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tk[0] : %c\n", token[0]);
1356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
1357 if (len > current_len)
1359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
1360 return GNUNET_YES; // Token too long, wont match
1362 if (0 != strncmp (current, token, len))
1364 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
1365 return GNUNET_YES; // Token doesn't match
1368 if (len > ctx->longest_match)
1370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token is longer, KEEP\n");
1371 ctx->longest_match = len;
1376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token is not longer, IGNORE\n");
1379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
1385 * Jump to the next edge, with the longest matching token.
1387 * @param block Block found in the DHT.
1388 * @param size Size of the block.
1389 * @param ctx Context of the search.
1391 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1394 regex_next_edge (const struct MeshRegexBlock *block,
1396 struct MeshRegexSearchContext *ctx)
1398 struct MeshRegexSearchContext *new_ctx;
1399 struct MeshRegexSearchInfo *info = ctx->info;
1400 struct GNUNET_DHT_GetHandle *get_h;
1404 /* Find the longest match for the current string position,
1405 * among tokens in the given block */
1406 ctx->longest_match = 0;
1407 result = GNUNET_MESH_regex_block_iterate (block, size,
1408 ®ex_edge_iterator, ctx);
1409 GNUNET_break (GNUNET_OK == result || SIZE_MAX == size);
1411 /* Did anything match? */
1412 if (0 == ctx->longest_match)
1415 new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
1416 new_ctx->info = info;
1417 new_ctx->position = ctx->position + ctx->longest_match;
1418 GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
1420 /* Check whether we already have a DHT GET running for it */
1422 GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, &ctx->hash))
1424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
1425 GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results,
1427 ®ex_result_iterator,
1429 return; // We are already looking for it
1432 GNUNET_STATISTICS_update (stats, "# regex nodes traversed", 1, GNUNET_NO);
1434 /* Start search in DHT */
1436 GNUNET_DHT_get_start (dht_handle, /* handle */
1437 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
1438 &ctx->hash, /* key to search */
1439 dht_replication_level, /* replication level */
1440 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1441 NULL, /* xquery */ // FIXME BLOOMFILTER
1442 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1443 &dht_get_string_handler, new_ctx);
1445 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
1448 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1457 * Iterator over hash map entries to cancel DHT GET requests after a
1458 * successful connect_by_string.
1460 * @param cls Closure (unused).
1461 * @param key Current key code (unused).
1462 * @param value Value in the hash map (get handle).
1463 * @return GNUNET_YES if we should continue to iterate,
1467 regex_cancel_dht_get (void *cls,
1468 const struct GNUNET_HashCode * key,
1471 struct GNUNET_DHT_GetHandle *h = value;
1473 GNUNET_DHT_get_stop (h);
1479 * Iterator over hash map entries to free MeshRegexBlocks stored during the
1480 * search for connect_by_string.
1482 * @param cls Closure (unused).
1483 * @param key Current key code (unused).
1484 * @param value MeshRegexBlock in the hash map.
1485 * @return GNUNET_YES if we should continue to iterate,
1489 regex_free_result (void *cls,
1490 const struct GNUNET_HashCode * key,
1494 GNUNET_free (value);
1500 * Regex callback iterator to store own service description in the DHT.
1502 * @param cls closure.
1503 * @param key hash for current state.
1504 * @param proof proof for current state.
1505 * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
1506 * @param num_edges number of edges leaving current state.
1507 * @param edges edges leaving current state.
1510 regex_iterator (void *cls,
1511 const struct GNUNET_HashCode *key,
1514 unsigned int num_edges,
1515 const struct GNUNET_REGEX_Edge *edges)
1517 struct MeshRegexBlock *block;
1518 struct MeshRegexEdge *block_edge;
1519 enum GNUNET_DHT_RouteOption opt;
1523 unsigned int offset;
1526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1527 " regex dht put for state %s\n",
1529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1536 opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
1537 if (GNUNET_YES == accepting)
1539 struct MeshRegexAccept block;
1541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1542 " state %s is accepting, putting own id\n",
1544 size = sizeof (block);
1546 block.id = my_full_id;
1548 GNUNET_DHT_put(dht_handle, key,
1549 dht_replication_level,
1550 opt | GNUNET_DHT_RO_RECORD_ROUTE,
1551 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
1554 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1559 len = strlen(proof);
1560 size = sizeof (struct MeshRegexBlock) + len;
1561 block = GNUNET_malloc (size);
1564 block->n_proof = htonl (len);
1565 block->n_edges = htonl (num_edges);
1566 block->accepting = htonl (accepting);
1568 /* Store the proof at the end of the block. */
1569 aux = (char *) &block[1];
1570 memcpy (aux, proof, len);
1573 /* Store each edge in a variable length MeshEdge struct at the
1574 * very end of the MeshRegexBlock structure.
1576 for (i = 0; i < num_edges; i++)
1578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1579 " edge %s towards %s\n",
1581 GNUNET_h2s(&edges[i].destination));
1583 /* aux points at the end of the last block */
1584 len = strlen (edges[i].label);
1585 size += sizeof (struct MeshRegexEdge) + len;
1586 // Calculate offset FIXME is this ok? use size instead?
1587 offset = aux - (char *) block;
1588 block = GNUNET_realloc (block, size);
1589 aux = &((char *) block)[offset];
1590 block_edge = (struct MeshRegexEdge *) aux;
1591 block_edge->key = edges[i].destination;
1592 block_edge->n_token = htonl (len);
1593 aux = (char *) &block_edge[1];
1594 memcpy (aux, edges[i].label, len);
1598 GNUNET_DHT_put(dht_handle, key,
1599 dht_replication_level,
1601 GNUNET_BLOCK_TYPE_MESH_REGEX, size,
1603 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1607 GNUNET_free (block);
1612 * Store the regular expression describing a local service into the DHT.
1614 * @param regex The regular expresion.
1617 regex_put (const struct MeshRegexDescriptor *regex)
1619 struct GNUNET_REGEX_Automaton *dfa;
1621 DEBUG_DHT (" regex_put (%s) start\n", regex->regex);
1622 dfa = GNUNET_REGEX_construct_dfa (regex->regex,
1623 strlen(regex->regex),
1624 regex->compression);
1625 GNUNET_REGEX_iterate_all_edges (dfa, ®ex_iterator, NULL);
1626 GNUNET_REGEX_automaton_destroy (dfa);
1627 DEBUG_DHT (" regex_put (%s) end\n", regex);
1632 * Find a path to a peer that offers a regex servcie compatible
1633 * with a given string.
1635 * @param key The key of the accepting state.
1636 * @param ctx Context containing info about the string, tunnel, etc.
1639 regex_find_path (const struct GNUNET_HashCode *key,
1640 struct MeshRegexSearchContext *ctx)
1642 struct GNUNET_DHT_GetHandle *get_h;
1644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
1645 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
1646 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
1647 key, /* key to search */
1648 dht_replication_level, /* replication level */
1649 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE |
1650 GNUNET_DHT_RO_RECORD_ROUTE,
1651 NULL, /* xquery */ // FIXME BLOOMFILTER
1652 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1653 &dht_get_string_accept_handler, ctx);
1654 GNUNET_break (GNUNET_OK ==
1655 GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
1658 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1663 * Function called if the connect attempt to a peer found via
1664 * connect_by_string times out. Try to connect to another peer, if any.
1665 * Otherwise try to reconnect to the same peer.
1667 * @param cls Closure (info about regex search).
1668 * @param tc TaskContext.
1671 regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1673 struct MeshRegexSearchInfo *info = cls;
1674 struct MeshPeerInfo *peer_info;
1678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
1679 info->timeout = GNUNET_SCHEDULER_NO_TASK;
1680 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
1688 if (0 < info->n_peers)
1690 // Select next peer, put current in that spot.
1691 id = info->peers[info->i_peer];
1692 info->peers[info->i_peer] = info->peer;
1693 info->i_peer = (info->i_peer + 1) % info->n_peers;
1697 // Try to connect to same peer again.
1700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
1702 peer_info = peer_info_get_short(id);
1703 tunnel_add_peer (info->t, peer_info);
1705 tunnel_delete_peer (info->t, old);
1706 peer_info_connect (peer_info, info->t);
1707 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
1708 ®ex_connect_timeout,
1710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
1715 * Cancel an ongoing regex search in the DHT and free all resources.
1717 * @param ctx The search context.
1720 regex_cancel_search(struct MeshRegexSearchContext *ctx)
1722 struct MeshRegexSearchInfo *info = ctx->info;
1725 GNUNET_free (info->description);
1726 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
1727 ®ex_cancel_dht_get, NULL);
1728 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
1729 ®ex_free_result, NULL);
1730 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
1731 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
1732 info->t->regex_ctx = NULL;
1733 for (i = 0; i < info->n_contexts; i++)
1735 GNUNET_free (info->contexts[i]);
1737 if (0 < info->n_contexts)
1738 GNUNET_free (info->contexts);
1739 if (0 < info->n_peers)
1740 GNUNET_free (info->peers);
1741 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
1743 GNUNET_SCHEDULER_cancel(info->timeout);
1749 /******************************************************************************/
1750 /************************ PERIODIC FUNCTIONS ****************************/
1751 /******************************************************************************/
1754 * Announce iterator over for each application provided by the peer
1756 * @param cls closure
1757 * @param key current key code
1758 * @param value value in the hash map
1759 * @return GNUNET_YES if we should continue to
1764 announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
1766 struct PBlock block;
1767 struct MeshClient *c;
1769 block.id = my_full_id;
1770 c = GNUNET_CONTAINER_multihashmap_get (applications, key);
1771 GNUNET_assert(NULL != c);
1772 block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
1773 if (0 == block.type)
1778 block.type = htonl (block.type);
1780 GNUNET_break (NULL !=
1781 GNUNET_DHT_put (dht_handle, key,
1782 dht_replication_level,
1783 GNUNET_DHT_RO_RECORD_ROUTE |
1784 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1785 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
1787 (const char *) &block,
1788 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1790 app_announce_time, NULL, NULL));
1796 * Periodically announce what applications are provided by local clients
1799 * @param cls closure
1800 * @param tc task context
1803 announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1805 struct MeshClient *c = cls;
1808 c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
1809 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1814 DEBUG_DHT ("Starting PUT for regex\n");
1816 for (i = 0; i < c->n_regex; i++)
1818 regex_put (&c->regexes[i]);
1820 c->regex_announce_task = GNUNET_SCHEDULER_add_delayed (app_announce_time,
1823 DEBUG_DHT ("Finished PUT for regex\n");
1830 * Periodically announce what applications are provided by local clients
1833 * @param cls closure
1834 * @param tc task context
1837 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1839 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1841 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
1845 DEBUG_DHT ("Starting PUT for apps\n");
1847 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
1849 announce_applications_task =
1850 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
1852 DEBUG_DHT ("Finished PUT for apps\n");
1859 * Periodically announce self id in the DHT
1861 * @param cls closure
1862 * @param tc task context
1865 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1867 struct PBlock block;
1869 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1871 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1875 * - Set data expiration in function of X
1876 * - Adapt X to churn
1878 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1880 block.id = my_full_id;
1881 block.type = htonl (0);
1882 GNUNET_DHT_put (dht_handle, /* DHT handle */
1883 &my_full_id.hashPubKey, /* Key to use */
1884 dht_replication_level, /* Replication level */
1885 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1886 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1887 sizeof (block), /* Size of the data */
1888 (const char *) &block, /* Data itself */
1889 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1890 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1891 NULL, /* Continuation */
1892 NULL); /* Continuation closure */
1894 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1898 /******************************************************************************/
1899 /****************** GENERAL HELPER FUNCTIONS ************************/
1900 /******************************************************************************/
1903 * Decrements the reference counter and frees all resources if needed
1905 * @param mesh_data Data Descriptor used in a multicast message.
1906 * Freed no longer needed (last message).
1909 data_descriptor_decrement_rc (struct MeshData *mesh_data)
1911 if (0 == --(mesh_data->reference_counter))
1913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1914 GNUNET_free (mesh_data->data);
1915 GNUNET_free (mesh_data);
1921 * Check if client has registered with the service and has not disconnected
1923 * @param client the client to check
1925 * @return non-NULL if client exists in the global DLL
1927 static struct MeshClient *
1928 client_get (struct GNUNET_SERVER_Client *client)
1930 struct MeshClient *c;
1935 if (c->handle == client)
1944 * Checks if a given client has subscribed to certain message type
1946 * @param message_type Type of message to check
1947 * @param c Client to check
1949 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1951 * FIXME: use of crypto_hash slows it down
1952 * The hash function alone takes 8-10us out of the ~55us for the whole
1953 * process of retransmitting the message from one local client to another.
1954 * Find faster implementation!
1957 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1959 struct GNUNET_HashCode hc;
1961 if (NULL == c->types)
1964 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1965 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1970 * Check whether client wants traffic from a tunnel.
1972 * @param c Client to check.
1973 * @param t Tunnel to be found.
1975 * @return GNUNET_YES if client knows tunnel.
1977 * TODO look in client hashmap
1980 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1984 for (i = 0; i < t->nclients; i++)
1985 if (t->clients[i] == c)
1992 * Check whether client has been informed about a tunnel.
1994 * @param c Client to check.
1995 * @param t Tunnel to be found.
1997 * @return GNUNET_YES if client knows tunnel.
1999 * TODO look in client hashmap
2002 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
2006 for (i = 0; i < t->nignore; i++)
2007 if (t->ignore[i] == c)
2009 return client_wants_tunnel(c, t);
2014 * Marks a client as uninterested in traffic from the tunnel, updating both
2015 * client and tunnel to reflect this.
2017 * @param c Client that doesn't want traffic anymore.
2018 * @param t Tunnel which should be ignored.
2020 * FIXME when to delete an incoming tunnel?
2023 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
2025 struct GNUNET_HashCode hash;
2027 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2028 GNUNET_break (GNUNET_YES ==
2029 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
2031 GNUNET_break (GNUNET_YES ==
2032 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
2033 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2034 tunnel_delete_active_client (t, c);
2035 GNUNET_array_append (t->ignore, t->nignore, c);
2040 * Deletes a tunnel from a client (either owner or destination). To be used on
2041 * tunnel destroy, otherwise, use client_ignore_tunnel.
2043 * @param c Client whose tunnel to delete.
2044 * @param t Tunnel which should be deleted.
2047 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
2049 struct GNUNET_HashCode hash;
2053 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2054 GNUNET_assert (GNUNET_YES ==
2055 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
2061 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2063 GNUNET_assert (GNUNET_YES ==
2064 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
2068 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
2076 * Send the message to all clients that have subscribed to its type
2078 * @param msg Pointer to the message itself
2079 * @param payload Pointer to the payload of the message.
2080 * @param t The tunnel to whose clients this message goes.
2082 * @return number of clients this message was sent to
2085 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
2086 const struct GNUNET_MessageHeader *payload,
2087 struct MeshTunnel *t)
2089 struct MeshClient *c;
2090 MESH_TunnelNumber *tid;
2093 char cbuf[htons (msg->size)];
2095 type = ntohs (payload->type);
2096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
2097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %s\n",
2098 GNUNET_MESH_DEBUG_M2S (type));
2100 memcpy (cbuf, msg, sizeof (cbuf));
2101 switch (htons (msg->type))
2103 struct GNUNET_MESH_Unicast *uc;
2104 struct GNUNET_MESH_Multicast *mc;
2105 struct GNUNET_MESH_ToOrigin *to;
2107 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2108 uc = (struct GNUNET_MESH_Unicast *) cbuf;
2111 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
2112 mc = (struct GNUNET_MESH_Multicast *) cbuf;
2115 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2116 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
2124 for (count = 0, c = clients; c != NULL; c = c->next)
2126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
2127 if (client_is_subscribed (type, c))
2129 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
2133 *tid = htonl (t->local_tid);
2137 if (GNUNET_NO == client_knows_tunnel (c, t))
2139 /* This client doesn't know the tunnel */
2140 struct GNUNET_MESH_TunnelNotification tmsg;
2141 struct GNUNET_HashCode hash;
2143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
2144 tmsg.header.size = htons (sizeof (tmsg));
2145 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2146 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
2147 tmsg.tunnel_id = htonl (t->local_tid_dest);
2149 if (GNUNET_YES == t->speed_min)
2150 tmsg.opt |= MESH_TUNNEL_OPT_SPEED_MIN;
2151 if (GNUNET_YES == t->nobuffer)
2152 tmsg.opt |= MESH_TUNNEL_OPT_NOBUFFER;
2153 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2154 &tmsg.header, GNUNET_NO);
2155 tunnel_add_client (t, c);
2156 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2158 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2159 c->incoming_tunnels, &hash, t,
2160 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2162 *tid = htonl (t->local_tid_dest);
2165 /* Check if the client wants to get traffic from the tunnel */
2166 if (GNUNET_NO == client_wants_tunnel(c, t))
2169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
2170 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2171 (struct GNUNET_MessageHeader
2172 *) cbuf, GNUNET_NO);
2181 * Notify the client that owns the tunnel that a peer has connected to it
2182 * (the requested path to it has been confirmed).
2184 * @param t Tunnel whose owner to notify
2185 * @param id Short id of the peer that has connected
2188 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
2190 struct GNUNET_MESH_PeerControl pc;
2192 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2193 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2194 pc.tunnel_id = htonl (t->local_tid);
2195 GNUNET_PEER_resolve (id, &pc.peer);
2196 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
2202 * Notify all clients (not depending on registration status) that the incoming
2203 * tunnel is no longer valid.
2205 * @param t Tunnel that was destroyed.
2208 send_clients_tunnel_destroy (struct MeshTunnel *t)
2210 struct GNUNET_MESH_TunnelMessage msg;
2212 msg.header.size = htons (sizeof (msg));
2213 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2214 msg.tunnel_id = htonl (t->local_tid_dest);
2215 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
2220 * Notify clients of tunnel disconnections, if needed.
2221 * In case the origin disconnects, the destination clients get a tunnel destroy
2222 * notification. If the last destination disconnects (only one remaining client
2223 * in tunnel), the origin gets a (local ID) peer disconnected.
2224 * Note that the function must be called BEFORE removing the client from
2227 * @param t Tunnel that was destroyed.
2228 * @param c Client that disconnected.
2231 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2237 struct GNUNET_MESH_TunnelMessage msg;
2239 msg.header.size = htons (sizeof (msg));
2240 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2241 msg.tunnel_id = htonl (t->local_tid_dest);
2242 for (i = 0; i < t->nclients; i++)
2243 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2244 &msg.header, GNUNET_NO);
2246 // FIXME when to disconnect an incoming tunnel?
2247 else if (1 == t->nclients && NULL != t->owner)
2249 struct GNUNET_MESH_PeerControl msg;
2251 msg.header.size = htons (sizeof (msg));
2252 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2253 msg.tunnel_id = htonl (t->local_tid);
2254 msg.peer = my_full_id;
2255 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2256 &msg.header, GNUNET_NO);
2262 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2263 * and insert it in the appropiate structures if the peer is not known yet.
2265 * @param peer Full identity of the peer.
2267 * @return Existing or newly created peer info.
2269 static struct MeshPeerInfo *
2270 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2272 struct MeshPeerInfo *peer_info;
2274 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2275 if (NULL == peer_info)
2278 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2279 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2280 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2281 peer_info->id = GNUNET_PEER_intern (peer);
2289 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2290 * and insert it in the appropiate structures if the peer is not known yet.
2292 * @param peer Short identity of the peer.
2294 * @return Existing or newly created peer info.
2296 static struct MeshPeerInfo *
2297 peer_info_get_short (const GNUNET_PEER_Id peer)
2299 struct GNUNET_PeerIdentity id;
2301 GNUNET_PEER_resolve (peer, &id);
2302 return peer_info_get (&id);
2307 * Iterator to remove the tunnel from the list of tunnels a peer participates
2310 * @param cls Closure (tunnel info)
2311 * @param key GNUNET_PeerIdentity of the peer (unused)
2312 * @param value PeerInfo of the peer
2314 * @return always GNUNET_YES, to keep iterating
2317 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2319 struct MeshTunnel *t = cls;
2320 struct MeshPeerInfo *peer = value;
2323 for (i = 0; i < peer->ntunnels; i++)
2326 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2329 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2330 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2339 * Core callback to write a pre-constructed data packet to core buffer
2341 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2342 * @param size Number of bytes available in buf.
2343 * @param buf Where the to write the message.
2345 * @return number of bytes written to buf
2348 send_core_data_raw (void *cls, size_t size, void *buf)
2350 struct MeshTransmissionDescriptor *info = cls;
2351 struct GNUNET_MessageHeader *msg;
2354 GNUNET_assert (NULL != info);
2355 GNUNET_assert (NULL != info->mesh_data);
2356 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2357 total_size = ntohs (msg->size);
2359 if (total_size > size)
2364 memcpy (buf, msg, total_size);
2365 data_descriptor_decrement_rc (info->mesh_data);
2372 * Sends an already built non-multicast message to a peer,
2373 * properly registrating all used resources.
2375 * @param message Message to send. Function makes a copy of it.
2376 * @param peer Short ID of the neighbor whom to send the message.
2377 * @param t Tunnel on which this message is transmitted.
2380 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
2381 const struct GNUNET_PeerIdentity *peer,
2382 struct MeshTunnel *t)
2384 struct MeshTransmissionDescriptor *info;
2385 struct MeshPeerInfo *neighbor;
2386 struct MeshPeerPath *p;
2390 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2392 size = ntohs (message->size);
2393 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2394 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2395 info->mesh_data->data = GNUNET_malloc (size);
2396 memcpy (info->mesh_data->data, message, size);
2397 type = ntohs(message->type);
2400 struct GNUNET_MESH_Unicast *m;
2401 struct GNUNET_MESH_ToOrigin *to;
2403 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2404 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2405 m->ttl = htonl (ntohl (m->ttl) - 1);
2407 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2408 to = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
2410 to->pid = htonl(t->bck_pid);
2412 info->mesh_data->data_len = size;
2413 info->mesh_data->reference_counter = 1;
2414 info->mesh_data->total_out = 1;
2415 neighbor = peer_info_get (peer);
2416 for (p = neighbor->path_head; NULL != p; p = p->next)
2426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2427 " %s IS NOT DIRECTLY CONNECTED\n",
2429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2432 for (p = neighbor->path_head; NULL != p; p = p->next)
2434 struct GNUNET_PeerIdentity debug_id;
2437 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2438 " path with %u hops through:\n",
2440 for (i = 0; i < p->length; i++)
2442 GNUNET_PEER_resolve(p->peers[i], &debug_id);
2443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2445 i, GNUNET_i2s(&debug_id));
2449 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2450 GNUNET_free (info->mesh_data->data);
2451 GNUNET_free (info->mesh_data);
2455 info->peer = neighbor;
2456 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
2467 * Sends a CREATE PATH message for a path to a peer, properly registrating
2468 * all used resources.
2470 * @param peer PeerInfo of the final peer for whom this path is being created.
2471 * @param p Path itself.
2472 * @param t Tunnel for which the path is created.
2475 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2476 struct MeshTunnel *t)
2478 struct GNUNET_PeerIdentity id;
2479 struct MeshPathInfo *path_info;
2480 struct MeshPeerInfo *neighbor;
2486 p = tree_get_path_to_peer (t->tree, peer->id);
2493 for (i = 0; i < p->length; i++)
2495 if (p->peers[i] == myid)
2498 if (i >= p->length - 1)
2504 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2506 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2507 path_info->path = p;
2509 neighbor = peer_info_get (&id);
2510 path_info->peer = neighbor;
2511 queue_add (path_info,
2512 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2513 sizeof (struct GNUNET_MESH_ManipulatePath) +
2514 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2521 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2523 * @param t Tunnel whose path to destroy.
2524 * @param destination Short ID of the peer to whom the path to destroy.
2527 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2529 struct MeshPeerPath *p;
2532 p = tree_get_path_to_peer (t->tree, destination);
2538 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2539 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2541 struct GNUNET_MESH_ManipulatePath *msg;
2542 struct GNUNET_PeerIdentity *pi;
2546 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2547 msg->header.size = htons (size);
2548 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2549 msg->tid = htonl (t->id.tid);
2550 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2551 for (i = 0; i < p->length; i++)
2553 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2555 send_prebuilt_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2562 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
2564 * @param t Tunnel which to confirm.
2567 send_path_ack (struct MeshTunnel *t)
2569 struct MeshTransmissionDescriptor *info;
2570 struct GNUNET_PeerIdentity id;
2571 GNUNET_PEER_Id peer;
2573 peer = tree_get_predecessor (t->tree);
2574 GNUNET_PEER_resolve (peer, &id);
2575 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2576 info->origin = &t->id;
2577 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
2578 GNUNET_assert (NULL != info->peer);
2581 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2582 sizeof (struct GNUNET_MESH_PathACK),
2589 * Try to establish a new connection to this peer.
2590 * Use the best path for the given tunnel.
2591 * If the peer doesn't have any path to it yet, try to get one.
2592 * If the peer already has some path, send a CREATE PATH towards it.
2594 * @param peer PeerInfo of the peer.
2595 * @param t Tunnel for which to create the path, if possible.
2598 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2600 struct MeshPeerPath *p;
2601 struct MeshPathInfo *path_info;
2603 if (NULL != peer->path_head)
2605 p = tree_get_path_to_peer (t->tree, peer->id);
2612 // FIXME always send create path to self
2615 send_create_path (peer, p, t);
2619 struct GNUNET_HashCode hash;
2622 send_client_peer_connected (t, myid);
2623 t->local_tid_dest = next_local_tid++;
2624 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2627 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2628 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2635 else if (NULL == peer->dhtget)
2637 struct GNUNET_PeerIdentity id;
2639 GNUNET_PEER_resolve (peer->id, &id);
2640 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2641 path_info->peer = peer;
2643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2644 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2645 peer->dhtgetcls = path_info;
2646 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2647 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2648 &id.hashPubKey, /* key to search */
2649 dht_replication_level, /* replication level */
2650 GNUNET_DHT_RO_RECORD_ROUTE |
2651 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2652 NULL, /* xquery */ // FIXME BLOOMFILTER
2653 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2654 &dht_get_id_handler, path_info);
2656 /* Otherwise, there is no path but the DHT get is already started. */
2661 * Task to delay the connection of a peer
2663 * @param cls Closure (path info with tunnel and peer to connect).
2664 * Will be free'd on exection.
2665 * @param tc TaskContext
2668 peer_info_connect_task (void *cls,
2669 const struct GNUNET_SCHEDULER_TaskContext *tc)
2671 struct MeshPathInfo *path_info = cls;
2673 path_info->peer->connect_task = GNUNET_SCHEDULER_NO_TASK;
2675 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2680 peer_info_connect (path_info->peer, path_info->t);
2686 * Destroy the peer_info and free any allocated resources linked to it
2688 * @param pi The peer_info to destroy.
2690 * @return GNUNET_OK on success
2693 peer_info_destroy (struct MeshPeerInfo *pi)
2695 struct GNUNET_PeerIdentity id;
2696 struct MeshPeerPath *p;
2697 struct MeshPeerPath *nextp;
2699 GNUNET_PEER_resolve (pi->id, &id);
2700 GNUNET_PEER_change_rc (pi->id, -1);
2703 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2706 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2707 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2709 if (NULL != pi->dhtget)
2711 GNUNET_DHT_get_stop (pi->dhtget);
2712 GNUNET_free (pi->dhtgetcls);
2718 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2722 if (GNUNET_SCHEDULER_NO_TASK != pi->connect_task)
2724 GNUNET_free (GNUNET_SCHEDULER_cancel (pi->connect_task));
2732 * Remove all paths that rely on a direct connection between p1 and p2
2733 * from the peer itself and notify all tunnels about it.
2735 * @param peer PeerInfo of affected peer.
2736 * @param p1 GNUNET_PEER_Id of one peer.
2737 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2740 * TODO: optimize (see below)
2743 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2746 struct MeshPeerPath *p;
2747 struct MeshPeerPath *aux;
2748 struct MeshPeerInfo *peer_d;
2750 unsigned int destroyed;
2755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2757 p = peer->path_head;
2761 for (i = 0; i < (p->length - 1); i++)
2763 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2764 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2766 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2777 for (i = 0; i < peer->ntunnels; i++)
2779 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2783 * Problem: one or more peers have been deleted from the tunnel tree.
2784 * We don't know who they are to try to add them again.
2785 * We need to try to find a new path for each of the disconnected peers.
2786 * Some of them might already have a path to reach them that does not
2787 * involve p1 and p2. Adding all anew might render in a better tree than
2788 * the trivial immediate fix.
2790 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2791 * its children will be reachable trough him.
2793 peer_d = peer_info_get_short (d);
2796 for (p = peer_d->path_head; NULL != p; p = p->next)
2798 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2806 /* No callback, as peer will be already disconnected and a connection
2807 * scheduled by tunnel_notify_connection_broken.
2809 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2813 peer_info_connect (peer_d, peer->tunnels[i]);
2816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2821 * Add the path to the peer and update the path used to reach it in case this
2824 * @param peer_info Destination peer to add the path to.
2825 * @param path New path to add. Last peer must be the peer in arg 1.
2826 * Path will be either used of freed if already known.
2827 * @param trusted Do we trust that this path is real?
2830 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2833 struct MeshPeerPath *aux;
2837 if ((NULL == peer_info) || (NULL == path))
2840 path_destroy (path);
2843 if (path->peers[path->length - 1] != peer_info->id)
2846 path_destroy (path);
2849 if (path->length <= 2 && GNUNET_NO == trusted)
2851 /* Only allow CORE to tell us about direct paths */
2852 path_destroy (path);
2855 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2856 for (l = 1; l < path->length; l++)
2858 if (path->peers[l] == myid)
2860 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2861 for (l2 = 0; l2 < path->length - l; l2++)
2863 path->peers[l2] = path->peers[l + l2];
2868 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2873 struct GNUNET_PeerIdentity id;
2875 GNUNET_PEER_resolve (peer_info->id, &id);
2876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2877 path->length, GNUNET_i2s (&id));
2880 l = path_get_length (path);
2887 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2888 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2890 l2 = path_get_length (aux);
2893 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2894 peer_info->path_tail, aux, path);
2899 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2901 path_destroy (path);
2906 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2913 * Add the path to the origin peer and update the path used to reach it in case
2914 * this is the shortest.
2915 * The path is given in peer_info -> destination, therefore we turn the path
2916 * upside down first.
2918 * @param peer_info Peer to add the path to, being the origin of the path.
2919 * @param path New path to add after being inversed.
2920 * @param trusted Do we trust that this path is real?
2923 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2924 struct MeshPeerPath *path, int trusted)
2927 peer_info_add_path (peer_info, path, trusted);
2932 * Function called if the connection to the peer has been stalled for a while,
2933 * possibly due to a missed ACK. Poll the peer about its ACK status.
2935 * @param cls Closure (MeshPeerInfo of stalled peer).
2936 * @param tc TaskContext.
2939 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2941 struct MeshTunnelFlowControlInfo *fcinfo = cls;
2942 struct GNUNET_MESH_Poll msg;
2943 struct GNUNET_PeerIdentity id;
2944 struct MeshTunnel *t;
2946 // FIXME fc include code to poll clients
2947 if (NULL == fcinfo->peer)
2949 fcinfo->fc_poll = GNUNET_SCHEDULER_NO_TASK;
2950 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2956 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
2957 msg.header.size = htons (sizeof (msg));
2958 msg.tid = htonl (t->id.tid);
2959 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2960 msg.last_ack = htonl (fcinfo->fwd_ack);
2962 GNUNET_PEER_resolve (fcinfo->peer->id, &id);
2963 send_prebuilt_message (&msg.header, &id, fcinfo->t);
2964 fcinfo->fc_poll = GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_UNIT_SECONDS,
2965 &tunnel_poll, fcinfo);
2971 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2972 * to obtain a local peer -> destination path and interning the peer ids.
2974 * @return Newly allocated and created path
2976 static struct MeshPeerPath *
2977 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2978 unsigned int get_path_length,
2979 const struct GNUNET_PeerIdentity *put_path,
2980 unsigned int put_path_length)
2982 struct MeshPeerPath *p;
2988 GNUNET_PEER_change_rc (myid, 1);
2989 i = get_path_length;
2990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2991 for (i--; i >= 0; i--)
2993 id = GNUNET_PEER_intern (&get_path[i]);
2994 if (p->length > 0 && id == p->peers[p->length - 1])
2996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2997 GNUNET_PEER_change_rc (id, -1);
3001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
3002 GNUNET_i2s (&get_path[i]));
3004 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
3005 p->peers[p->length - 1] = id;
3008 i = put_path_length;
3009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
3010 for (i--; i >= 0; i--)
3012 id = GNUNET_PEER_intern (&put_path[i]);
3015 /* PUT path went through us, so discard the path up until now and start
3016 * from here to get a much shorter (and loop-free) path.
3021 if (p->length > 0 && id == p->peers[p->length - 1])
3023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
3024 GNUNET_PEER_change_rc (id, -1);
3028 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
3029 GNUNET_i2s (&put_path[i]));
3031 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
3032 p->peers[p->length - 1] = id;
3036 if (get_path_length > 0)
3037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
3038 GNUNET_i2s (&get_path[0]));
3039 if (put_path_length > 0)
3040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
3041 GNUNET_i2s (&put_path[0]));
3042 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
3044 for (i = 0; i < p->length; i++)
3046 struct GNUNET_PeerIdentity peer_id;
3048 GNUNET_PEER_resolve (p->peers[i], &peer_id);
3049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
3050 GNUNET_i2s (&peer_id));
3058 * Adds a path to the peer_infos of all the peers in the path
3060 * @param p Path to process.
3061 * @param confirmed Whether we know if the path works or not.
3064 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
3068 /* TODO: invert and add */
3069 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
3070 for (i++; i < p->length; i++)
3072 struct MeshPeerInfo *aux;
3073 struct MeshPeerPath *copy;
3075 aux = peer_info_get_short (p->peers[i]);
3076 copy = path_duplicate (p);
3077 copy->length = i + 1;
3078 peer_info_add_path (aux, copy, GNUNET_NO);
3084 * Send keepalive packets for a peer
3086 * @param cls Closure (tunnel for which to send the keepalive).
3087 * @param tc Notification context.
3089 * TODO: implement explicit multicast keepalive?
3092 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3096 * Search for a tunnel among the incoming tunnels
3098 * @param tid the local id of the tunnel
3100 * @return tunnel handler, NULL if doesn't exist
3102 static struct MeshTunnel *
3103 tunnel_get_incoming (MESH_TunnelNumber tid)
3105 struct GNUNET_HashCode hash;
3107 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
3108 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3109 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
3114 * Search for a tunnel among the tunnels for a client
3116 * @param c the client whose tunnels to search in
3117 * @param tid the local id of the tunnel
3119 * @return tunnel handler, NULL if doesn't exist
3121 static struct MeshTunnel *
3122 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
3124 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3126 return tunnel_get_incoming (tid);
3130 struct GNUNET_HashCode hash;
3132 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3133 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
3139 * Search for a tunnel by global ID using PEER_ID
3141 * @param pi owner of the tunnel
3142 * @param tid global tunnel number
3144 * @return tunnel handler, NULL if doesn't exist
3146 static struct MeshTunnel *
3147 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
3149 struct MESH_TunnelID id;
3150 struct GNUNET_HashCode hash;
3155 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
3156 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
3161 * Search for a tunnel by global ID using full PeerIdentities
3163 * @param oid owner of the tunnel
3164 * @param tid global tunnel number
3166 * @return tunnel handler, NULL if doesn't exist
3168 static struct MeshTunnel *
3169 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
3171 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
3176 * Delete an active client from the tunnel.
3182 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
3186 for (i = 0; i < t->nclients; i++)
3188 if (t->clients[i] == c)
3190 t->clients[i] = t->clients[t->nclients - 1];
3191 t->clients_fc[i] = t->clients_fc[t->nclients - 1];
3192 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
3194 GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
3202 * Delete an ignored client from the tunnel.
3208 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
3212 for (i = 0; i < t->nignore; i++)
3214 if (t->ignore[i] == c)
3216 t->ignore[i] = t->ignore[t->nignore - 1];
3217 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
3225 * Delete a client from the tunnel. It should be only done on
3226 * client disconnection, otherwise use client_ignore_tunnel.
3232 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
3234 tunnel_delete_ignored_client (t, c);
3235 tunnel_delete_active_client (t, c);
3240 * @brief Iterator to destroy MeshTunnelChildInfo of tunnel children.
3242 * Destroys queue elements of all waiting transmissions and frees all memory
3243 * used by the struct and its elements.
3245 * @param cls Closure (tunnel info).
3246 * @param key Hash of GNUNET_PEER_Id (unused).
3247 * @param value MeshTunnelChildInfo of the child.
3249 * @return always GNUNET_YES, to keep iterating
3252 tunnel_destroy_child (void *cls,
3253 const struct GNUNET_HashCode * key,
3256 struct MeshTunnelFlowControlInfo *cinfo = value;
3257 struct MeshTunnel *t = cls;
3258 struct MeshPeerQueue *q;
3262 for (c = 0; c < cinfo->send_buffer_n; c++)
3264 i = (cinfo->send_buffer_start + c) % t->fwd_queue_max;
3265 q = cinfo->send_buffer[i];
3266 cinfo->send_buffer[i] = NULL;
3268 queue_destroy (q, GNUNET_YES);
3271 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "%u %u\n", c, cinfo->send_buffer_n);
3273 GNUNET_free_non_null (cinfo->send_buffer);
3274 GNUNET_free (cinfo);
3280 * Callback used to notify a client owner of a tunnel that a peer has
3281 * disconnected, most likely because of a path change.
3283 * @param cls Closure (tunnel this notification is about).
3284 * @param peer_id Short ID of disconnected peer.
3287 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
3289 struct MeshTunnel *t = cls;
3290 struct MeshPeerInfo *peer;
3291 struct MeshPathInfo *path_info;
3293 if (NULL != t->owner && NULL != nc)
3295 struct GNUNET_MESH_PeerControl msg;
3297 msg.header.size = htons (sizeof (msg));
3298 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
3299 msg.tunnel_id = htonl (t->local_tid);
3300 GNUNET_PEER_resolve (peer_id, &msg.peer);
3301 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3302 &msg.header, GNUNET_NO);
3304 peer = peer_info_get_short (peer_id);
3305 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
3306 path_info->peer = peer;
3308 peer->connect_task = GNUNET_SCHEDULER_add_now (&peer_info_connect_task,
3314 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
3315 * needed rescources.
3316 * If peer already exists, reevaluate shortest path and change if different.
3318 * @param t Tunnel we want to add a new peer to
3319 * @param peer PeerInfo of the peer being added
3323 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
3325 struct GNUNET_PeerIdentity id;
3326 struct MeshPeerPath *best_p;
3327 struct MeshPeerPath *p;
3328 unsigned int best_cost;
3331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
3332 GNUNET_PEER_resolve (peer->id, &id);
3334 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
3337 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
3338 GNUNET_assert (GNUNET_OK ==
3339 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
3341 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3344 if (NULL != (p = peer->path_head))
3347 best_cost = tree_get_path_cost (t->tree, p);
3350 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
3357 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
3358 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
3359 t->path_refresh_task =
3360 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3364 /* Start a DHT get */
3365 peer_info_connect (peer, t);
3367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3371 * Add a path to a tunnel which we don't own, just to remember the next hop.
3372 * If destination node was already in the tunnel, the first hop information
3373 * will be replaced with the new path.
3375 * @param t Tunnel we want to add a new peer to
3376 * @param p Path to add
3377 * @param own_pos Position of local node in path.
3381 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3382 unsigned int own_pos)
3384 struct GNUNET_PeerIdentity id;
3386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3387 GNUNET_assert (0 != own_pos);
3388 tree_add_path (t->tree, p, NULL, NULL);
3389 if (own_pos < p->length - 1)
3391 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3392 tree_update_first_hops (t->tree, myid, &id);
3394 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3398 * Add a client to a tunnel, initializing all needed data structures.
3400 * @param t Tunnel to which add the client.
3401 * @param c Client which to add to the tunnel.
3404 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
3406 struct MeshTunnelFlowControlInfo fcinfo;
3408 GNUNET_array_append (t->clients, t->nclients, c);
3410 fcinfo.fwd_ack = t->fwd_pid + 1;
3411 fcinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
3412 fcinfo.fwd_pid = t->fwd_pid;
3413 fcinfo.bck_pid = (uint32_t) -1; // Expected next: 0
3414 fcinfo.fc_poll = GNUNET_SCHEDULER_NO_TASK;
3415 // FIXME fc buffering is done by context_notify. Confirm this is OK.
3418 GNUNET_array_append (t->clients_fc, t->nclients, fcinfo);
3423 * Notifies a tunnel that a connection has broken that affects at least
3424 * some of its peers. Sends a notification towards the root of the tree.
3425 * In case the peer is the owner of the tree, notifies the client that owns
3426 * the tunnel and tries to reconnect.
3428 * @param t Tunnel affected.
3429 * @param p1 Peer that got disconnected from p2.
3430 * @param p2 Peer that got disconnected from p1.
3432 * @return Short ID of the peer disconnected (either p1 or p2).
3433 * 0 if the tunnel remained unaffected.
3435 static GNUNET_PEER_Id
3436 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3442 tree_notify_connection_broken (t->tree, p1, p2,
3443 &tunnel_notify_client_peer_disconnected,
3445 if (myid != p1 && myid != p2)
3451 if (tree_get_predecessor (t->tree) != 0)
3453 /* We are the peer still connected, notify owner of the disconnection. */
3454 struct GNUNET_MESH_PathBroken msg;
3455 struct GNUNET_PeerIdentity neighbor;
3457 msg.header.size = htons (sizeof (msg));
3458 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3459 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3460 msg.tid = htonl (t->id.tid);
3461 msg.peer1 = my_full_id;
3462 GNUNET_PEER_resolve (pid, &msg.peer2);
3463 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3464 send_prebuilt_message (&msg.header, &neighbor, t);
3472 * Send a multicast packet to a neighbor.
3474 * @param cls Closure (Info about the multicast packet)
3475 * @param neighbor_id Short ID of the neighbor to send the packet to.
3478 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3480 struct MeshData *mdata = cls;
3481 struct MeshTransmissionDescriptor *info;
3482 struct GNUNET_PeerIdentity neighbor;
3483 struct GNUNET_MessageHeader *msg;
3485 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3487 info->mesh_data = mdata;
3488 (mdata->reference_counter) ++;
3489 info->destination = neighbor_id;
3490 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3491 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3492 GNUNET_i2s (&neighbor));
3493 info->peer = peer_info_get (&neighbor);
3494 GNUNET_assert (NULL != info->peer);
3495 msg = (struct GNUNET_MessageHeader *) mdata->data;
3498 info->mesh_data->data_len,
3505 * Queue a message in a tunnel in multicast, sending a copy to each child node
3506 * down the local one in the tunnel tree.
3508 * @param t Tunnel in which to send the data.
3509 * @param msg Message to be sent.
3512 tunnel_send_multicast (struct MeshTunnel *t,
3513 const struct GNUNET_MessageHeader *msg)
3515 struct MeshData *mdata;
3517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3518 " sending a multicast packet...\n");
3520 mdata = GNUNET_malloc (sizeof (struct MeshData));
3521 mdata->data_len = ntohs (msg->size);
3523 mdata->data = GNUNET_malloc (mdata->data_len);
3524 memcpy (mdata->data, msg, mdata->data_len);
3525 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3527 struct GNUNET_MESH_Multicast *mcast;
3529 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3530 if (t->fwd_queue_n >= t->fwd_queue_max)
3533 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " queue full!\n");
3534 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3535 " message from %s!\n",
3536 GNUNET_i2s(&mcast->oid));
3537 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3538 " message at %s!\n",
3539 GNUNET_i2s(&my_full_id));
3540 GNUNET_free (mdata->data);
3541 GNUNET_free (mdata);
3545 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3547 ntohl (mcast->ttl));
3551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3554 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3555 if (mdata->reference_counter == 0)
3557 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3558 " no one to send data to\n");
3559 GNUNET_free (mdata->data);
3560 GNUNET_free (mdata);
3565 mdata->total_out = mdata->reference_counter;
3567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3568 " sending a multicast packet done\n");
3574 * Increase the SKIP value of all peers that
3575 * have not received a unicast message.
3577 * @param cls Closure (ID of the peer that HAS received the message).
3578 * @param key ID of the neighbor.
3579 * @param value FLow control information about the neighbor.
3581 * @return GNUNET_YES to keep iterating.
3584 tunnel_add_skip (void *cls,
3585 const struct GNUNET_HashCode * key,
3588 struct GNUNET_PeerIdentity *neighbor = cls;
3589 struct MeshTunnelFlowControlInfo *fcinfo = value;
3591 /* TODO compare only pointers? key == neighbor? */
3592 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3602 * @brief Get neighbor's Flow Control information.
3604 * Retrieves the MeshTunnelFlowControlInfo containing Flow Control data about
3605 * a direct descendant of the local node in a certain tunnel.
3606 * If the info is not yet there (recently created path), creates the data struct
3607 * and inserts it into the tunnel info, initialized to the current tunnel ACK
3610 * @param t Tunnel related.
3611 * @param peer Neighbor whose Flow Control info is needed.
3613 * @return Neighbor's Flow Control info.
3615 static struct MeshTunnelFlowControlInfo *
3616 tunnel_get_neighbor_fc (struct MeshTunnel *t,
3617 const struct GNUNET_PeerIdentity *peer)
3619 struct MeshTunnelFlowControlInfo *fcinfo;
3621 if (NULL == t->children_fc)
3624 fcinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3630 fcinfo = GNUNET_malloc (sizeof (struct MeshTunnelFlowControlInfo));
3631 fcinfo->peer = peer_info_get(peer);
3632 fcinfo->skip = t->fwd_pid;
3635 delta = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3636 fcinfo->fwd_ack = t->fwd_pid + delta;
3637 fcinfo->bck_ack = delta;
3638 fcinfo->bck_pid = -1;
3640 fcinfo->send_buffer =
3641 GNUNET_malloc (sizeof(struct MeshPeerQueue *) * t->fwd_queue_max);
3643 GNUNET_assert (GNUNET_OK ==
3644 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
3647 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3654 * Get the Flow Control info of a client.
3656 * @param t Tunnel on which to look.
3657 * @param c Client whose ACK to get.
3659 * @return ACK value.
3661 static struct MeshTunnelFlowControlInfo *
3662 tunnel_get_client_fc (struct MeshTunnel *t,
3663 struct MeshClient *c)
3667 for (i = 0; i < t->nclients; i++)
3669 if (t->clients[i] != c)
3671 return &t->clients_fc[i];
3674 return NULL; // won't get here. Just to avoid compiler / coverity complaints.
3679 * Iterator to get the appropiate ACK value from all children nodes.
3681 * @param cls Closue (tunnel).
3682 * @param id Id of the child node.
3685 tunnel_get_child_fwd_ack (void *cls,
3688 struct GNUNET_PeerIdentity peer_id;
3689 struct MeshTunnelFlowControlInfo *fcinfo;
3690 struct MeshTunnelChildIteratorContext *ctx = cls;
3691 struct MeshTunnel *t = ctx->t;
3694 GNUNET_PEER_resolve (id, &peer_id);
3695 fcinfo = tunnel_get_neighbor_fc (t, &peer_id);
3696 ack = fcinfo->fwd_ack;
3699 if (GNUNET_NO == ctx->init)
3701 ctx->max_child_ack = ack;
3702 ctx->init = GNUNET_YES;
3705 if (GNUNET_YES == t->speed_min)
3707 ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
3711 ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
3717 * Get the maximum PID allowed to transmit to any
3718 * tunnel child of the local peer, depending on the tunnel
3719 * buffering/speed settings.
3723 * @return Maximum PID allowed (uint32 MAX), -1LL if node has no children.
3726 tunnel_get_children_fwd_ack (struct MeshTunnel *t)
3728 struct MeshTunnelChildIteratorContext ctx;
3730 ctx.max_child_ack = 0;
3732 ctx.init = GNUNET_NO;
3733 tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
3735 if (0 == ctx.nchildren)
3737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3738 " tunnel has no children, no FWD ACK\n");
3742 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
3743 ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
3745 return (int64_t) ctx.max_child_ack;
3750 * Set the FWD ACK value of a client in a particular tunnel.
3752 * @param t Tunnel affected.
3753 * @param c Client whose ACK to set.
3754 * @param ack ACK value.
3757 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
3758 struct MeshClient *c,
3763 for (i = 0; i < t->nclients; i++)
3765 if (t->clients[i] != c)
3767 t->clients_fc[i].fwd_ack = ack;
3775 * Get the highest ACK value of all clients in a particular tunnel,
3776 * according to the buffering/speed settings.
3778 * @param t Tunnel on which to look.
3780 * @return Corresponding ACK value (max uint32_t).
3781 * If no clients are suscribed, -1LL.
3784 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
3789 if (0 == t->nclients)
3791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3792 " tunnel has no clients, no FWD ACK\n");
3796 for (ack = -1LL, i = 0; i < t->nclients; i++)
3799 (GNUNET_YES == t->speed_min &&
3800 GNUNET_YES == GMC_is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
3801 (GNUNET_NO == t->speed_min &&
3802 GNUNET_YES == GMC_is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
3804 ack = t->clients_fc[i].fwd_ack;
3808 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
3809 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
3811 return (uint32_t) ack;
3816 * Get the current fwd ack value for a tunnel, taking in account the tunnel
3817 * mode and the status of all children nodes.
3821 * @return Maximum PID allowed.
3824 tunnel_get_fwd_ack (struct MeshTunnel *t)
3828 uint32_t buffer_free;
3832 count = t->fwd_pid - t->skip;
3833 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
3834 child_ack = tunnel_get_children_fwd_ack (t);
3835 client_ack = tunnel_get_clients_fwd_ack (t);
3836 if (GNUNET_YES == t->nobuffer)
3839 if (-1LL == child_ack)
3840 child_ack = client_ack;
3841 if (-1LL == child_ack)
3844 client_ack = child_ack = ack;
3849 ack = count + buffer_free; // Overflow? OK!
3851 if (-1LL == child_ack)
3853 // Node has no children, child_ack AND core buffer are irrelevant.
3854 GNUNET_break (-1LL != client_ack); // No children AND no clients? Not good!
3855 return (uint32_t) client_ack;
3857 if (-1LL == client_ack)
3861 if (GNUNET_YES == t->speed_min)
3863 ack = GMC_min_pid ((uint32_t) child_ack, ack);
3864 ack = GMC_min_pid ((uint32_t) client_ack, ack);
3868 ack = GMC_max_pid ((uint32_t) child_ack, ack);
3869 ack = GMC_max_pid ((uint32_t) client_ack, ack);
3871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3872 "c %u, bf %u, ch %lld, cl %lld, ACK: %u\n",
3873 count, buffer_free, child_ack, client_ack, ack);
3879 * Build a local ACK message and send it to a local client.
3881 * @param t Tunnel on which to send the ACK.
3882 * @param c Client to whom send the ACK.
3883 * @param ack Value of the ACK.
3886 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
3888 struct GNUNET_MESH_LocalAck msg;
3890 msg.header.size = htons (sizeof (msg));
3891 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
3892 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
3893 msg.max_pid = htonl (ack);
3894 GNUNET_SERVER_notification_context_unicast(nc,
3901 * Build an ACK message and queue it to send to the given peer.
3903 * @param t Tunnel on which to send the ACK.
3904 * @param peer Peer to whom send the ACK.
3905 * @param ack Value of the ACK.
3908 send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
3910 struct GNUNET_MESH_ACK msg;
3912 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3913 msg.header.size = htons (sizeof (msg));
3914 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3915 msg.pid = htonl (ack);
3916 msg.tid = htonl (t->id.tid);
3918 send_prebuilt_message (&msg.header, peer, t);
3923 * Notify a the owner of a tunnel about how many more
3924 * payload packages will we accept on a given tunnel.
3926 * @param t Tunnel on which to send the ACK.
3929 tunnel_send_client_fwd_ack (struct MeshTunnel *t)
3933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3934 "Sending client FWD ACK on tunnel %X\n",
3937 ack = tunnel_get_fwd_ack (t);
3939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
3940 if (t->last_fwd_ack == ack)
3942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " same as last, not sending!\n");
3946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
3947 t->last_fwd_ack = ack;
3948 send_local_ack (t, t->owner, ack);
3953 * Send an ACK informing the predecessor about the available buffer space.
3954 * In case there is no predecessor, inform the owning client.
3955 * If buffering is off, send only on behalf of children or self if endpoint.
3956 * If buffering is on, send when sent to children and buffer space is free.
3957 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
3958 * the ACK itself goes "back" (towards root).
3960 * @param t Tunnel on which to send the ACK.
3961 * @param type Type of message that triggered the ACK transmission.
3964 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
3966 struct GNUNET_PeerIdentity id;
3969 if (NULL != t->owner)
3971 tunnel_send_client_fwd_ack (t);
3974 /* Is it after unicast / multicast retransmission? */
3977 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3978 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3980 "ACK due to FWD DATA retransmission\n");
3981 if (GNUNET_YES == t->nobuffer)
3983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3987 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3988 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3994 /* Check if we need no retransmit the ACK */
3995 if (t->fwd_queue_max > t->fwd_queue_n * 4 &&
3996 GMC_is_pid_bigger(t->last_fwd_ack, t->fwd_pid))
3998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4000 " t->qmax: %u, t->qn: %u\n",
4001 t->fwd_queue_max, t->fwd_queue_n);
4002 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4003 " t->pid: %u, t->ack: %u\n",
4004 t->fwd_pid, t->last_fwd_ack);
4008 /* Ok, ACK might be necessary, what PID to ACK? */
4009 ack = tunnel_get_fwd_ack (t);
4011 /* If speed_min and not all children have ack'd, dont send yet */
4012 if (ack == t->last_fwd_ack)
4014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
4018 t->last_fwd_ack = ack;
4019 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4020 send_ack (t, &id, ack);
4026 * Iterator to send a child node a BCK ACK to allow him to send more
4029 * @param cls Closure (tunnel).
4030 * @param id Id of the child node.
4033 tunnel_send_child_bck_ack (void *cls,
4036 struct MeshTunnel *t = cls;
4037 struct MeshTunnelFlowControlInfo *fcinfo;
4038 struct GNUNET_PeerIdentity peer;
4041 GNUNET_PEER_resolve (id, &peer);
4042 fcinfo = tunnel_get_neighbor_fc (t, &peer);
4043 ack = fcinfo->bck_pid + t->bck_queue_max - t->bck_queue_n;
4046 if (fcinfo->bck_ack == ack)
4048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4049 " Not sending ACK, not needed\n");
4052 fcinfo->bck_ack = ack;
4054 fcinfo->bck_ack = fcinfo->bck_pid + t->bck_queue_max - t->bck_queue_n;
4055 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4056 " Sending BCK ACK %u (last sent: %u)\n",
4057 ack, fcinfo->bck_ack);
4058 send_ack (t, &peer, ack);
4063 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
4065 * Iterates over all clients and sends BCK ACKs to the ones that need it.
4067 * FIXME fc: what happens if we have 2 clients but q_size is 1?
4068 * - implement a size 1 buffer in each client_fc AND children_fc
4069 * to hold at least 1 message per "child".
4070 * problem: violates no buffer policy
4071 * - ack 0 and make "children" poll for transmission slots
4072 * problem: big overhead, extra latency even in low traffic
4075 * @param t Tunnel on which to send the BCK ACKs.
4078 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
4081 unsigned int tunnel_delta;
4083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Sending BCK ACK to clients\n");
4085 tunnel_delta = t->bck_queue_max - t->bck_queue_n;
4086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " tunnel delta: %u\n", tunnel_delta);
4088 /* Find client whom to allow to send to origin (with lowest buffer space) */
4089 for (i = 0; i < t->nclients; i++)
4091 struct MeshTunnelFlowControlInfo *fcinfo;
4094 fcinfo = &t->clients_fc[i];
4095 delta = fcinfo->bck_ack - fcinfo->bck_pid;
4096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u delta: %u\n",
4097 t->clients[i]->id, delta);
4099 if ((GNUNET_NO == t->nobuffer && tunnel_delta > delta) ||
4100 (GNUNET_YES == t->nobuffer && 0 == delta))
4104 ack = fcinfo->bck_pid;
4105 ack += t->nobuffer ? 1 : tunnel_delta;
4106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4107 " sending ack to client %u: %u\n",
4108 t->clients[i]->id, ack);
4109 send_local_ack (t, t->clients[i], ack);
4110 fcinfo->bck_ack = ack;
4114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4115 " not sending ack to client %u (td %u, d %u)\n",
4116 t->clients[i]->id, tunnel_delta, delta);
4123 * Send an ACK informing the children nodes and destination clients about
4124 * the available buffer space.
4125 * If buffering is off, send only on behalf of root (can be self).
4126 * If buffering is on, send when sent to predecessor and buffer space is free.
4127 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
4128 * the ACK itself goes "forward" (towards children/clients).
4130 * @param t Tunnel on which to send the ACK.
4131 * @param type Type of message that triggered the ACK transmission.
4134 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
4136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4137 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
4138 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
4139 /* Is it after data to_origin retransmission? */
4142 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4143 if (GNUNET_YES == t->nobuffer)
4145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4146 " Not sending ACK, nobuffer\n");
4150 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4151 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
4152 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4158 tunnel_send_clients_bck_ack (t);
4159 tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, t);
4164 * @brief Re-initiate traffic to this peer if necessary.
4166 * Check if there is traffic queued towards this peer
4167 * and the core transmit handle is NULL (traffic was stalled).
4168 * If so, call core tmt rdy.
4170 * @param cls Closure (unused)
4171 * @param peer_id Short ID of peer to which initiate traffic.
4174 peer_unlock_queue(void *cls, GNUNET_PEER_Id peer_id)
4176 struct MeshPeerInfo *peer;
4177 struct GNUNET_PeerIdentity id;
4178 struct MeshPeerQueue *q;
4181 peer = peer_info_get_short(peer_id);
4182 if (NULL != peer->core_transmit)
4185 q = queue_get_next(peer);
4188 /* Might br multicast traffic already sent to this particular peer but
4189 * not to other children in this tunnel.
4190 * This way t->queue_n would be > 0 but the queue of this particular peer
4196 GNUNET_PEER_resolve (peer->id, &id);
4197 peer->core_transmit =
4198 GNUNET_CORE_notify_transmit_ready(core_handle,
4201 GNUNET_TIME_UNIT_FOREVER_REL,
4211 * @brief Allow transmission of FWD traffic on this tunnel
4213 * Check if there is traffic queued towards any children
4214 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4216 * @param t Tunnel on which to unlock FWD traffic.
4219 tunnel_unlock_fwd_queues (struct MeshTunnel *t)
4221 if (0 == t->fwd_queue_n)
4224 tree_iterate_children (t->tree, &peer_unlock_queue, NULL);
4229 * @brief Allow transmission of BCK traffic on this tunnel
4231 * Check if there is traffic queued towards the root of the tree
4232 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4234 * @param t Tunnel on which to unlock BCK traffic.
4237 tunnel_unlock_bck_queue (struct MeshTunnel *t)
4239 if (0 == t->bck_queue_n)
4242 peer_unlock_queue(NULL, tree_get_predecessor(t->tree));
4247 * Send a message to all peers in this tunnel that the tunnel is no longer
4250 * @param t The tunnel whose peers to notify.
4253 tunnel_send_destroy (struct MeshTunnel *t)
4255 struct GNUNET_MESH_TunnelDestroy msg;
4257 msg.header.size = htons (sizeof (msg));
4258 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
4259 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
4260 msg.tid = htonl (t->id.tid);
4261 tunnel_send_multicast (t, &msg.header);
4266 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
4268 * @param cls Closure (Tunnel which to cancel).
4269 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
4272 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
4274 struct MeshTunnel *t = cls;
4275 struct MeshPeerInfo *peer_info;
4276 struct MeshPeerQueue *pq;
4277 struct MeshPeerQueue *next;
4279 peer_info = peer_info_get_short (neighbor_id);
4280 for (pq = peer_info->queue_head; NULL != pq; pq = next)
4283 if (pq->tunnel == t)
4285 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST == pq->type ||
4286 GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
4287 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
4289 // Should have been removed on destroy children
4292 queue_destroy (pq, GNUNET_YES);
4295 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
4297 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
4298 peer_info->core_transmit = NULL;
4303 * Destroy the tunnel and free any allocated resources linked to it.
4305 * @param t the tunnel to destroy
4307 * @return GNUNET_OK on success
4310 tunnel_destroy (struct MeshTunnel *t)
4312 struct MeshClient *c;
4313 struct GNUNET_HashCode hash;
4324 struct GNUNET_PeerIdentity id;
4326 GNUNET_PEER_resolve (t->id.oid, &id);
4327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
4328 GNUNET_i2s (&id), t->id.tid);
4330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4334 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4335 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
4343 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4345 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
4352 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4353 for (i = 0; i < t->nclients; i++)
4357 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
4363 for (i = 0; i < t->nignore; i++)
4367 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
4374 if (t->nclients > 0)
4377 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
4382 GNUNET_free (t->clients);
4383 GNUNET_free (t->clients_fc);
4386 if (NULL != t->peers)
4388 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
4390 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
4393 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4394 &tunnel_destroy_child,
4396 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
4397 t->children_fc = NULL;
4399 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
4400 tree_destroy (t->tree);
4402 if (NULL != t->regex_ctx)
4403 regex_cancel_search (t->regex_ctx);
4404 if (NULL != t->dht_get_type)
4405 GNUNET_DHT_get_stop (t->dht_get_type);
4406 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4407 GNUNET_SCHEDULER_cancel (t->timeout_task);
4408 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
4409 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
4412 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
4419 * Create a new tunnel
4421 * @param owner Who is the owner of the tunnel (short ID).
4422 * @param tid Tunnel Number of the tunnel.
4423 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
4424 * @param local Tunnel Number for the tunnel, for the client point of view.
4426 * @return A new initialized tunnel. NULL on error.
4428 static struct MeshTunnel *
4429 tunnel_new (GNUNET_PEER_Id owner,
4430 MESH_TunnelNumber tid,
4431 struct MeshClient *client,
4432 MESH_TunnelNumber local)
4434 struct MeshTunnel *t;
4435 struct GNUNET_HashCode hash;
4437 if (n_tunnels >= max_tunnels && NULL == client)
4440 t = GNUNET_malloc (sizeof (struct MeshTunnel));
4443 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
4444 t->bck_queue_max = t->fwd_queue_max;
4445 t->tree = tree_new (owner);
4447 t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
4448 t->bck_pid = (uint32_t) -1; // Next (expected) = 0
4449 t->bck_ack = INITIAL_WINDOW_SIZE - 1;
4450 t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
4451 t->local_tid = local;
4452 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
4454 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
4456 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4458 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
4459 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4466 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4473 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4475 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
4476 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4480 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4490 * Removes an explicit path from a tunnel, freeing all intermediate nodes
4491 * that are no longer needed, as well as nodes of no longer reachable peers.
4492 * The tunnel itself is also destoyed if results in a remote empty tunnel.
4494 * @param t Tunnel from which to remove the path.
4495 * @param peer Short id of the peer which should be removed.
4498 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
4500 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
4506 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
4507 * client when the client disconnects. If the client is not the owner, the
4508 * owner will get notified if no more clients are in the tunnel and the client
4509 * get removed from the tunnel's list.
4511 * @param cls closure (client that is disconnecting)
4512 * @param key the hash of the local tunnel id (used to access the hashmap)
4513 * @param value the value stored at the key (tunnel to destroy)
4515 * @return GNUNET_OK, keep iterating.
4518 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
4520 struct MeshTunnel *t = value;
4521 struct MeshClient *c = cls;
4523 send_client_tunnel_disconnect(t, c);
4526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4527 "Client %u is destination, keeping the tunnel alive.\n", c->id);
4528 tunnel_delete_client(t, c);
4529 client_delete_tunnel(c, t);
4532 tunnel_send_destroy(t);
4534 t->destroy = GNUNET_YES;
4541 * Timeout function, destroys tunnel if called
4543 * @param cls Closure (tunnel to destroy).
4544 * @param tc TaskContext
4547 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4549 struct MeshTunnel *t = cls;
4550 struct GNUNET_PeerIdentity id;
4552 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4553 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4555 GNUNET_PEER_resolve(t->id.oid, &id);
4556 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4557 "Tunnel %s [%X] timed out. Destroying.\n",
4558 GNUNET_i2s(&id), t->id.tid);
4559 send_clients_tunnel_destroy (t);
4564 * Resets the tunnel timeout. Starts it if no timeout was running.
4566 * @param t Tunnel whose timeout to reset.
4568 * TODO use heap to improve efficiency of scheduler.
4571 tunnel_reset_timeout (struct MeshTunnel *t)
4573 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4574 GNUNET_SCHEDULER_cancel (t->timeout_task);
4576 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
4577 (refresh_path_time, 4), &tunnel_timeout, t);
4581 /******************************************************************************/
4582 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4583 /******************************************************************************/
4586 * Function to send a create path packet to a peer.
4588 * @param cls closure
4589 * @param size number of bytes available in buf
4590 * @param buf where the callee should write the message
4591 * @return number of bytes written to buf
4594 send_core_path_create (void *cls, size_t size, void *buf)
4596 struct MeshPathInfo *info = cls;
4597 struct GNUNET_MESH_ManipulatePath *msg;
4598 struct GNUNET_PeerIdentity *peer_ptr;
4599 struct MeshTunnel *t = info->t;
4600 struct MeshPeerPath *p = info->path;
4605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
4607 sizeof (struct GNUNET_MESH_ManipulatePath) +
4608 p->length * sizeof (struct GNUNET_PeerIdentity);
4610 if (size < size_needed || NULL == buf)
4615 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
4616 msg->header.size = htons (size_needed);
4617 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
4618 msg->tid = ntohl (t->id.tid);
4621 if (GNUNET_YES == t->speed_min)
4622 opt |= MESH_TUNNEL_OPT_SPEED_MIN;
4623 if (GNUNET_YES == t->nobuffer)
4624 opt |= MESH_TUNNEL_OPT_NOBUFFER;
4625 msg->opt = htonl(opt);
4628 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
4629 for (i = 0; i < p->length; i++)
4631 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
4637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4638 "CREATE PATH (%u bytes long) sent!\n", size_needed);
4644 * Fill the core buffer
4646 * @param cls closure (data itself)
4647 * @param size number of bytes available in buf
4648 * @param buf where the callee should write the message
4650 * @return number of bytes written to buf
4653 send_core_data_multicast (void *cls, size_t size, void *buf)
4655 struct MeshTransmissionDescriptor *info = cls;
4658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
4659 GNUNET_assert (NULL != info);
4660 GNUNET_assert (NULL != info->peer);
4661 total_size = info->mesh_data->data_len;
4662 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
4664 if (total_size > size)
4669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
4670 memcpy (buf, info->mesh_data->data, total_size);
4673 struct GNUNET_MESH_Multicast *mc;
4674 struct GNUNET_MessageHeader *mh;
4677 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
4679 mc = (struct GNUNET_MESH_Multicast *) mh;
4680 mh = (struct GNUNET_MessageHeader *) &mc[1];
4681 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4682 " multicast, payload type %s\n",
4683 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4685 " multicast, payload size %u\n", ntohs (mh->size));
4689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %s\n",
4690 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4694 data_descriptor_decrement_rc (info->mesh_data);
4695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
4697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
4703 * Creates a path ack message in buf and frees all unused resources.
4705 * @param cls closure (MeshTransmissionDescriptor)
4706 * @param size number of bytes available in buf
4707 * @param buf where the callee should write the message
4708 * @return number of bytes written to buf
4711 send_core_path_ack (void *cls, size_t size, void *buf)
4713 struct MeshTransmissionDescriptor *info = cls;
4714 struct GNUNET_MESH_PathACK *msg = buf;
4716 GNUNET_assert (NULL != info);
4717 if (sizeof (struct GNUNET_MESH_PathACK) > size)
4722 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
4723 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
4724 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
4725 msg->tid = htonl (info->origin->tid);
4726 msg->peer_id = my_full_id;
4729 /* TODO add signature */
4731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
4732 return sizeof (struct GNUNET_MESH_PathACK);
4737 * Free a transmission that was already queued with all resources
4738 * associated to the request.
4740 * @param queue Queue handler to cancel.
4741 * @param clear_cls Is it necessary to free associated cls?
4744 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4746 struct MeshTransmissionDescriptor *dd;
4747 struct MeshPathInfo *path_info;
4748 struct MeshTunnelFlowControlInfo *fcinfo;
4749 struct GNUNET_PeerIdentity id;
4753 if (GNUNET_YES == clear_cls)
4755 switch (queue->type)
4757 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
4758 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " cancelling TUNNEL_DESTROY\n");
4759 GNUNET_assert (GNUNET_YES == queue->tunnel->destroy);
4760 /* FIXME: don't cancel, send and destroy tunnel in queue_send */
4762 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4763 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4764 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4765 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4766 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
4767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4768 " prebuilt message\n");
4769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4771 GNUNET_MESH_DEBUG_M2S(queue->type));
4773 data_descriptor_decrement_rc (dd->mesh_data);
4775 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
4777 path_info = queue->cls;
4778 path_destroy (path_info->path);
4782 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4783 " type %s unknown!\n",
4784 GNUNET_MESH_DEBUG_M2S(queue->type));
4786 GNUNET_free_non_null (queue->cls);
4788 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
4789 queue->peer->queue_tail,
4792 /* Delete from child_fc in the appropiate tunnel */
4793 max = queue->tunnel->fwd_queue_max;
4794 GNUNET_PEER_resolve (queue->peer->id, &id);
4795 fcinfo = tunnel_get_neighbor_fc (queue->tunnel, &id);
4798 GNUNET_assert (NULL != fcinfo->peer);
4799 for (i = 0; i < fcinfo->send_buffer_n; i++)
4802 i2 = (fcinfo->send_buffer_start + i) % max;
4803 if (fcinfo->send_buffer[i2] == queue)
4805 /* Found corresponding entry in the send_buffer. Move all others back. */
4810 for (j = i, j2 = 0, j3 = 0; j < fcinfo->send_buffer_n - 1; j++)
4812 j2 = (fcinfo->send_buffer_start + j) % max;
4813 j3 = (fcinfo->send_buffer_start + j + 1) % max;
4814 fcinfo->send_buffer[j2] = fcinfo->send_buffer[j3];
4817 fcinfo->send_buffer[j3] = NULL;
4818 fcinfo->send_buffer_n--;
4823 GNUNET_free (queue);
4828 * @brief Get the next transmittable message from the queue.
4830 * This will be the head, except in the case of being a data packet
4831 * not allowed by the destination peer.
4833 * @param peer Destination peer.
4835 * @return The next viable MeshPeerQueue element to send to that peer.
4836 * NULL when there are no transmittable messages.
4838 struct MeshPeerQueue *
4839 queue_get_next (const struct MeshPeerInfo *peer)
4841 struct MeshPeerQueue *q;
4842 struct MeshTunnel *t;
4843 struct MeshTransmissionDescriptor *info;
4844 struct MeshTunnelFlowControlInfo *fcinfo;
4845 struct GNUNET_MESH_Unicast *ucast;
4846 struct GNUNET_MESH_ToOrigin *to_orig;
4847 struct GNUNET_MESH_Multicast *mcast;
4848 struct GNUNET_PeerIdentity id;
4852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
4853 for (q = peer->queue_head; NULL != q; q = q->next)
4857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4859 GNUNET_MESH_DEBUG_M2S(q->type));
4862 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4863 ucast = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
4864 pid = ntohl (ucast->pid);
4865 GNUNET_PEER_resolve (info->peer->id, &id);
4866 fcinfo = tunnel_get_neighbor_fc (t, &id);
4867 ack = fcinfo->fwd_ack;
4869 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4870 to_orig = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
4871 pid = ntohl (to_orig->pid);
4874 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4875 mcast = (struct GNUNET_MESH_Multicast *) info->mesh_data->data;
4876 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST != ntohs(mcast->header.type))
4878 // Not a multicast payload: multicast control traffic (destroy, etc)
4881 pid = ntohl (mcast->pid);
4882 GNUNET_PEER_resolve (info->peer->id, &id);
4883 fcinfo = tunnel_get_neighbor_fc (t, &id);
4884 ack = fcinfo->fwd_ack;
4887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4892 "********* ACK: %u, PID: %u\n",
4894 if (GNUNET_NO == GMC_is_pid_bigger(pid, ack))
4896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4903 "********* NEXT!\n");
4906 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4907 "********* nothing found\n");
4913 * Core callback to write a queued packet to core buffer
4915 * @param cls Closure (peer info).
4916 * @param size Number of bytes available in buf.
4917 * @param buf Where the to write the message.
4919 * @return number of bytes written to buf
4922 queue_send (void *cls, size_t size, void *buf)
4924 struct MeshPeerInfo *peer = cls;
4925 struct GNUNET_MessageHeader *msg;
4926 struct MeshPeerQueue *queue;
4927 struct MeshTunnel *t;
4928 struct MeshTunnelFlowControlInfo *fcinfo;
4929 struct GNUNET_PeerIdentity dst_id;
4932 peer->core_transmit = NULL;
4935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
4936 queue = queue_get_next (peer);
4938 /* Queue has no internal mesh traffic nor sendable payload */
4941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
4942 if (NULL == peer->queue_head)
4943 GNUNET_break (0); // Should've been canceled
4946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
4948 GNUNET_PEER_resolve (peer->id, &dst_id);
4949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4950 "********* towards %s\n",
4951 GNUNET_i2s(&dst_id));
4952 /* Check if buffer size is enough for the message */
4953 if (queue->size > size)
4955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4956 "********* not enough room, reissue\n");
4957 peer->core_transmit =
4958 GNUNET_CORE_notify_transmit_ready (core_handle,
4961 GNUNET_TIME_UNIT_FOREVER_REL,
4968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
4971 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
4974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4975 "********* unicast: t->q (%u/%u)\n",
4976 t->fwd_queue_n, t->fwd_queue_max);
4978 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
4981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
4985 switch (queue->type)
4988 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4989 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4990 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
4991 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
4992 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
4993 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4994 "********* raw: %s\n",
4995 GNUNET_MESH_DEBUG_M2S (queue->type));
4997 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4998 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4999 data_size = send_core_data_raw (queue->cls, size, buf);
5000 msg = (struct GNUNET_MessageHeader *) buf;
5001 switch (ntohs (msg->type)) // Type of preconstructed message
5003 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5004 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5006 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5007 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5013 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
5014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
5016 struct MeshTransmissionDescriptor *info = queue->cls;
5018 if ((1 == info->mesh_data->reference_counter
5019 && GNUNET_YES == t->speed_min)
5021 (info->mesh_data->total_out == info->mesh_data->reference_counter
5022 && GNUNET_NO == t->speed_min))
5024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5025 "********* considered sent\n");
5029 data_size = send_core_data_multicast(queue->cls, size, buf);
5030 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5032 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
5033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
5034 data_size = send_core_path_create (queue->cls, size, buf);
5036 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
5037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
5038 data_size = send_core_path_ack (queue->cls, size, buf);
5040 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
5041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path keepalive\n");
5042 data_size = send_core_data_multicast (queue->cls, size, buf);
5046 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5047 "********* type unknown: %u\n",
5051 switch (queue->type)
5053 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5054 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5055 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
5056 fcinfo = tunnel_get_neighbor_fc (t, &dst_id);
5057 if (fcinfo->send_buffer[fcinfo->send_buffer_start] != queue)
5060 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5061 "at pos %u (%p) != %p\n",
5062 fcinfo->send_buffer_start,
5063 fcinfo->send_buffer[fcinfo->send_buffer_start],
5066 if (fcinfo->send_buffer_n > 0)
5068 fcinfo->send_buffer[fcinfo->send_buffer_start] = NULL;
5069 fcinfo->send_buffer_n--;
5070 fcinfo->send_buffer_start++;
5071 fcinfo->send_buffer_start %= t->fwd_queue_max;
5082 /* Free queue, but cls was freed by send_core_* */
5083 queue_destroy (queue, GNUNET_NO);
5085 if (GNUNET_YES == t->destroy)
5087 // FIXME fc tunnel destroy all pending traffic? wait for it?
5088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
5092 /* If more data in queue, send next */
5093 queue = queue_get_next(peer);
5096 struct GNUNET_PeerIdentity id;
5098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
5099 GNUNET_PEER_resolve (peer->id, &id);
5100 peer->core_transmit =
5101 GNUNET_CORE_notify_transmit_ready(core_handle,
5104 GNUNET_TIME_UNIT_FOREVER_REL,
5112 if (NULL != peer->queue_head)
5114 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5115 "********* %s stalled\n",
5116 GNUNET_i2s(&my_full_id));
5118 fcinfo = tunnel_get_neighbor_fc (t, &dst_id);
5119 fcinfo->fc_poll = GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_UNIT_SECONDS,
5120 &tunnel_poll, fcinfo);
5123 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
5129 * @brief Queue and pass message to core when possible.
5131 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
5132 * and accounts for it. In case the queue is full, the message is dropped and
5135 * Otherwise, message is treated as internal and allowed to go regardless of
5138 * @param cls Closure (@c type dependant). It will be used by queue_send to
5139 * build the message to be sent if not already prebuilt.
5140 * @param type Type of the message, 0 for a raw message.
5141 * @param size Size of the message.
5142 * @param dst Neighbor to send message to.
5143 * @param t Tunnel this message belongs to.
5146 queue_add (void *cls, uint16_t type, size_t size,
5147 struct MeshPeerInfo *dst, struct MeshTunnel *t)
5149 struct MeshPeerQueue *queue;
5150 struct MeshTunnelFlowControlInfo *fcinfo;
5151 struct GNUNET_PeerIdentity id;
5157 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
5158 GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
5160 n = &t->fwd_queue_n;
5161 max = &t->fwd_queue_max;
5163 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
5165 n = &t->bck_queue_n;
5166 max = &t->bck_queue_max;
5172 struct MeshTransmissionDescriptor *td = cls;
5173 struct GNUNET_MESH_ToOrigin *to;
5175 to = td->mesh_data->data;
5177 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5178 "bck pid %u, bck ack %u, msg pid %u\n",
5179 t->bck_pid, t->bck_ack, ntohl(to->pid));
5180 GNUNET_STATISTICS_update(stats, "# messages dropped (buffer full)",
5182 return; // Drop message
5186 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
5192 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
5193 GNUNET_PEER_resolve (dst->id, &id);
5194 if (NULL == dst->core_transmit)
5196 dst->core_transmit =
5197 GNUNET_CORE_notify_transmit_ready (core_handle,
5200 GNUNET_TIME_UNIT_FOREVER_REL,
5206 if (NULL == n) // Is this internal mesh traffic?
5209 // It's payload, keep track of buffer per peer.
5210 fcinfo = tunnel_get_neighbor_fc (t, &id);
5211 i = (fcinfo->send_buffer_start + fcinfo->send_buffer_n) % t->fwd_queue_max;
5212 if (NULL != fcinfo->send_buffer[i])
5214 GNUNET_break (fcinfo->send_buffer_n == t->fwd_queue_max); // aka i == start
5215 queue_destroy (fcinfo->send_buffer[fcinfo->send_buffer_start], GNUNET_YES);
5216 fcinfo->send_buffer_start++;
5217 fcinfo->send_buffer_start %= t->fwd_queue_max;
5221 fcinfo->send_buffer_n++;
5223 fcinfo->send_buffer[i] = queue;
5224 if (fcinfo->send_buffer_n > t->fwd_queue_max)
5227 fcinfo->send_buffer_n = t->fwd_queue_max;
5232 /******************************************************************************/
5233 /******************** MESH NETWORK HANDLERS **************************/
5234 /******************************************************************************/
5238 * Core handler for path creation
5240 * @param cls closure
5241 * @param message message
5242 * @param peer peer identity this notification is about
5243 * @param atsi performance data
5244 * @param atsi_count number of records in 'atsi'
5246 * @return GNUNET_OK to keep the connection open,
5247 * GNUNET_SYSERR to close it (signal serious error)
5250 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
5251 const struct GNUNET_MessageHeader *message,
5252 const struct GNUNET_ATS_Information *atsi,
5253 unsigned int atsi_count)
5255 unsigned int own_pos;
5258 MESH_TunnelNumber tid;
5259 struct GNUNET_MESH_ManipulatePath *msg;
5260 struct GNUNET_PeerIdentity *pi;
5261 struct GNUNET_HashCode hash;
5262 struct MeshPeerPath *path;
5263 struct MeshPeerInfo *dest_peer_info;
5264 struct MeshPeerInfo *orig_peer_info;
5265 struct MeshTunnel *t;
5267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5268 "Received a path create msg [%s]\n",
5269 GNUNET_i2s (&my_full_id));
5270 size = ntohs (message->size);
5271 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5273 GNUNET_break_op (0);
5277 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5278 if (size % sizeof (struct GNUNET_PeerIdentity))
5280 GNUNET_break_op (0);
5283 size /= sizeof (struct GNUNET_PeerIdentity);
5286 GNUNET_break_op (0);
5289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5290 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5292 tid = ntohl (msg->tid);
5293 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5295 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
5296 t = tunnel_get (pi, tid);
5297 if (NULL == t) // FIXME only for INCOMING tunnels?
5301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
5302 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
5305 // FIXME notify failure
5308 opt = ntohl (msg->opt);
5309 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
5310 GNUNET_YES : GNUNET_NO;
5311 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
5313 t->nobuffer = GNUNET_YES;
5314 t->last_fwd_ack = t->fwd_pid + 1;
5316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5317 " speed_min: %d, nobuffer:%d\n",
5318 t->speed_min, t->nobuffer);
5320 if (GNUNET_YES == t->nobuffer)
5322 t->bck_queue_max = 1;
5323 t->fwd_queue_max = 1;
5326 // FIXME only assign a local tid if a local client is interested (on demand)
5327 while (NULL != tunnel_get_incoming (next_local_tid))
5328 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5329 t->local_tid_dest = next_local_tid++;
5330 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5333 tunnel_reset_timeout (t);
5334 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
5336 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
5337 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
5345 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
5346 if (NULL == dest_peer_info)
5348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5349 " Creating PeerInfo for destination.\n");
5350 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5351 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
5352 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
5354 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5356 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
5357 if (NULL == orig_peer_info)
5359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5360 " Creating PeerInfo for origin.\n");
5361 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5362 orig_peer_info->id = GNUNET_PEER_intern (pi);
5363 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
5364 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5367 path = path_new (size);
5369 for (i = 0; i < size; i++)
5371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5372 GNUNET_i2s (&pi[i]));
5373 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5374 if (path->peers[i] == myid)
5377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5380 /* cannot be self, must be 'not found' */
5381 /* create path: self not found in path through self */
5382 GNUNET_break_op (0);
5383 path_destroy (path);
5387 path_add_to_peers (path, GNUNET_NO);
5388 tunnel_add_path (t, path, own_pos);
5389 if (own_pos == size - 1)
5391 /* It is for us! Send ack. */
5392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5393 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
5394 if (NULL == t->peers)
5396 /* New tunnel! Notify clients on first payload message. */
5397 t->peers = GNUNET_CONTAINER_multihashmap_create (4, GNUNET_NO);
5399 GNUNET_break (GNUNET_SYSERR !=
5400 GNUNET_CONTAINER_multihashmap_put (t->peers,
5401 &my_full_id.hashPubKey,
5404 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
5409 struct MeshPeerPath *path2;
5411 /* It's for somebody else! Retransmit. */
5412 path2 = path_duplicate (path);
5413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
5414 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
5415 path2 = path_duplicate (path);
5416 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
5417 send_create_path (dest_peer_info, path, t);
5424 * Core handler for path destruction
5426 * @param cls closure
5427 * @param message message
5428 * @param peer peer identity this notification is about
5429 * @param atsi performance data
5430 * @param atsi_count number of records in 'atsi'
5432 * @return GNUNET_OK to keep the connection open,
5433 * GNUNET_SYSERR to close it (signal serious error)
5436 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5437 const struct GNUNET_MessageHeader *message,
5438 const struct GNUNET_ATS_Information *atsi,
5439 unsigned int atsi_count)
5441 struct GNUNET_MESH_ManipulatePath *msg;
5442 struct GNUNET_PeerIdentity *pi;
5443 struct MeshPeerPath *path;
5444 struct MeshTunnel *t;
5445 unsigned int own_pos;
5449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5450 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
5451 size = ntohs (message->size);
5452 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5454 GNUNET_break_op (0);
5458 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5459 if (size % sizeof (struct GNUNET_PeerIdentity))
5461 GNUNET_break_op (0);
5464 size /= sizeof (struct GNUNET_PeerIdentity);
5467 GNUNET_break_op (0);
5470 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5472 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5473 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5475 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
5477 t = tunnel_get (pi, ntohl (msg->tid));
5480 /* TODO notify back: we don't know this tunnel */
5481 GNUNET_break_op (0);
5484 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5485 path = path_new (size);
5487 for (i = 0; i < size; i++)
5489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5490 GNUNET_i2s (&pi[i]));
5491 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5492 if (path->peers[i] == myid)
5495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5496 if (own_pos < path->length - 1)
5497 send_prebuilt_message (message, &pi[own_pos + 1], t);
5499 send_client_tunnel_disconnect(t, NULL);
5501 tunnel_delete_peer (t, path->peers[path->length - 1]);
5502 path_destroy (path);
5508 * Core handler for notifications of broken paths
5510 * @param cls closure
5511 * @param message message
5512 * @param peer peer identity this notification is about
5513 * @param atsi performance data
5514 * @param atsi_count number of records in 'atsi'
5516 * @return GNUNET_OK to keep the connection open,
5517 * GNUNET_SYSERR to close it (signal serious error)
5520 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
5521 const struct GNUNET_MessageHeader *message,
5522 const struct GNUNET_ATS_Information *atsi,
5523 unsigned int atsi_count)
5525 struct GNUNET_MESH_PathBroken *msg;
5526 struct MeshTunnel *t;
5528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5529 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
5530 msg = (struct GNUNET_MESH_PathBroken *) message;
5531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5532 GNUNET_i2s (&msg->peer1));
5533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5534 GNUNET_i2s (&msg->peer2));
5535 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5538 GNUNET_break_op (0);
5541 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
5542 GNUNET_PEER_search (&msg->peer2));
5549 * Core handler for tunnel destruction
5551 * @param cls closure
5552 * @param message message
5553 * @param peer peer identity this notification is about
5554 * @param atsi performance data
5555 * @param atsi_count number of records in 'atsi'
5557 * @return GNUNET_OK to keep the connection open,
5558 * GNUNET_SYSERR to close it (signal serious error)
5561 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5562 const struct GNUNET_MessageHeader *message,
5563 const struct GNUNET_ATS_Information *atsi,
5564 unsigned int atsi_count)
5566 struct GNUNET_MESH_TunnelDestroy *msg;
5567 struct MeshTunnel *t;
5569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5570 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
5571 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
5572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
5573 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
5574 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5577 /* Probably already got the message from another path,
5578 * destroyed the tunnel and retransmitted to children.
5581 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5584 if (t->id.oid == myid)
5586 GNUNET_break_op (0);
5589 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5591 /* Tunnel was incoming, notify clients */
5592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
5593 t->local_tid, t->local_tid_dest);
5594 send_clients_tunnel_destroy (t);
5596 tunnel_send_destroy (t);
5597 t->destroy = GNUNET_YES;
5598 // TODO: add timeout to destroy the tunnel anyway
5604 * Core handler for mesh network traffic going from the origin to a peer
5606 * @param cls closure
5607 * @param peer peer identity this notification is about
5608 * @param message message
5609 * @param atsi performance data
5610 * @param atsi_count number of records in 'atsi'
5611 * @return GNUNET_OK to keep the connection open,
5612 * GNUNET_SYSERR to close it (signal serious error)
5615 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5616 const struct GNUNET_MessageHeader *message,
5617 const struct GNUNET_ATS_Information *atsi,
5618 unsigned int atsi_count)
5620 struct GNUNET_MESH_Unicast *msg;
5621 struct GNUNET_PeerIdentity *neighbor;
5622 struct MeshTunnelFlowControlInfo *fcinfo;
5623 struct MeshTunnel *t;
5624 GNUNET_PEER_Id dest_id;
5629 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
5632 size = ntohs (message->size);
5634 sizeof (struct GNUNET_MESH_Unicast) +
5635 sizeof (struct GNUNET_MessageHeader))
5640 msg = (struct GNUNET_MESH_Unicast *) message;
5641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5642 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5644 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5647 /* TODO notify back: we don't know this tunnel */
5648 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5649 GNUNET_break_op (0);
5652 pid = ntohl (msg->pid);
5653 if (t->fwd_pid == pid)
5655 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5656 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5657 " Already seen pid %u, DROPPING!\n", pid);
5662 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5663 " pid %u not seen yet, forwarding\n", pid);
5666 t->skip += (pid - t->fwd_pid) - 1;
5669 if (GMC_is_pid_bigger (pid, t->last_fwd_ack))
5671 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5672 GNUNET_break_op (0);
5673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5674 "Received PID %u, ACK %u\n",
5675 pid, t->last_fwd_ack);
5679 tunnel_reset_timeout (t);
5680 dest_id = GNUNET_PEER_search (&msg->destination);
5681 if (dest_id == myid)
5683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5684 " it's for us! sending to clients...\n");
5685 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
5686 send_subscribed_clients (message, &msg[1].header, t);
5687 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5690 ttl = ntohl (msg->ttl);
5691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5694 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5695 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5696 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5700 " not for us, retransmitting...\n");
5702 neighbor = tree_get_first_hop (t->tree, dest_id);
5703 fcinfo = tunnel_get_neighbor_fc (t, neighbor);
5704 fcinfo->fwd_pid = pid;
5705 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
5708 if (GNUNET_YES == t->nobuffer &&
5709 GNUNET_YES == GMC_is_pid_bigger (pid, fcinfo->fwd_ack))
5711 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5712 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " %u > %u\n", pid, fcinfo->fwd_ack);
5713 GNUNET_break_op (0);
5716 send_prebuilt_message (message, neighbor, t);
5717 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
5723 * Core handler for mesh network traffic going from the origin to all peers
5725 * @param cls closure
5726 * @param message message
5727 * @param peer peer identity this notification is about
5728 * @param atsi performance data
5729 * @param atsi_count number of records in 'atsi'
5730 * @return GNUNET_OK to keep the connection open,
5731 * GNUNET_SYSERR to close it (signal serious error)
5733 * TODO: Check who we got this from, to validate route.
5736 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5737 const struct GNUNET_MessageHeader *message,
5738 const struct GNUNET_ATS_Information *atsi,
5739 unsigned int atsi_count)
5741 struct GNUNET_MESH_Multicast *msg;
5742 struct MeshTunnel *t;
5746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
5748 size = ntohs (message->size);
5749 if (sizeof (struct GNUNET_MESH_Multicast) +
5750 sizeof (struct GNUNET_MessageHeader) > size)
5752 GNUNET_break_op (0);
5755 msg = (struct GNUNET_MESH_Multicast *) message;
5756 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5760 /* TODO notify that we dont know that tunnel */
5761 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5762 GNUNET_break_op (0);
5765 pid = ntohl (msg->pid);
5766 if (t->fwd_pid == pid)
5768 /* already seen this packet, drop */
5769 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5771 " Already seen pid %u, DROPPING!\n", pid);
5772 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5778 " pid %u not seen yet, forwarding\n", pid);
5780 t->skip += (pid - t->fwd_pid) - 1;
5782 tunnel_reset_timeout (t);
5784 /* Transmit to locally interested clients */
5785 if (NULL != t->peers &&
5786 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
5788 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
5789 send_subscribed_clients (message, &msg[1].header, t);
5790 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5792 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
5793 if (ntohl (msg->ttl) == 0)
5795 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5796 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5797 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5800 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
5801 tunnel_send_multicast (t, message);
5807 * Core handler for mesh network traffic toward the owner of a tunnel
5809 * @param cls closure
5810 * @param message message
5811 * @param peer peer identity this notification is about
5812 * @param atsi performance data
5813 * @param atsi_count number of records in 'atsi'
5815 * @return GNUNET_OK to keep the connection open,
5816 * GNUNET_SYSERR to close it (signal serious error)
5819 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
5820 const struct GNUNET_MessageHeader *message,
5821 const struct GNUNET_ATS_Information *atsi,
5822 unsigned int atsi_count)
5824 struct GNUNET_MESH_ToOrigin *msg;
5825 struct GNUNET_PeerIdentity id;
5826 struct MeshPeerInfo *peer_info;
5827 struct MeshTunnel *t;
5828 struct MeshTunnelFlowControlInfo *fcinfo;
5832 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
5834 size = ntohs (message->size);
5835 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
5836 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
5838 GNUNET_break_op (0);
5841 msg = (struct GNUNET_MESH_ToOrigin *) message;
5842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5843 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5844 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5845 pid = ntohl (msg->pid);
5849 /* TODO notify that we dont know this tunnel (whom)? */
5850 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5851 GNUNET_break_op (0);
5852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5853 "Received to_origin with PID %u on unknown tunnel\n",
5858 fcinfo = tunnel_get_neighbor_fc (t, peer);
5865 if (fcinfo->bck_pid == pid)
5867 /* already seen this packet, drop */
5868 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
5869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5870 " Already seen pid %u, DROPPING!\n", pid);
5871 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5876 " pid %u not seen yet, forwarding\n", pid);
5877 fcinfo->bck_pid = pid;
5879 if (NULL != t->owner)
5882 struct GNUNET_MESH_ToOrigin *copy;
5884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5885 " it's for us! sending to clients...\n");
5886 /* TODO signature verification */
5887 memcpy (cbuf, message, size);
5888 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
5889 copy->tid = htonl (t->local_tid);
5891 copy->pid = htonl (t->bck_pid);
5892 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
5893 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
5894 ©->header, GNUNET_NO);
5895 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5899 " not for us, retransmitting...\n");
5901 peer_info = peer_info_get (&msg->oid);
5902 if (NULL == peer_info)
5904 /* unknown origin of tunnel */
5908 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5909 send_prebuilt_message (message, &id, t);
5910 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
5917 * Core handler for mesh network traffic point-to-point acks.
5919 * @param cls closure
5920 * @param message message
5921 * @param peer peer identity this notification is about
5922 * @param atsi performance data
5923 * @param atsi_count number of records in 'atsi'
5925 * @return GNUNET_OK to keep the connection open,
5926 * GNUNET_SYSERR to close it (signal serious error)
5929 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5930 const struct GNUNET_MessageHeader *message,
5931 const struct GNUNET_ATS_Information *atsi,
5932 unsigned int atsi_count)
5934 struct GNUNET_MESH_ACK *msg;
5935 struct MeshTunnel *t;
5938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
5940 msg = (struct GNUNET_MESH_ACK *) message;
5942 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5946 /* TODO notify that we dont know this tunnel (whom)? */
5947 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
5948 GNUNET_break_op (0);
5951 ack = ntohl (msg->pid);
5952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
5954 /* Is this a forward or backward ACK? */
5955 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
5957 struct MeshTunnelFlowControlInfo *fcinfo;
5960 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
5961 fcinfo = tunnel_get_neighbor_fc (t, peer);
5962 fcinfo->fwd_ack = ack;
5963 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5964 tunnel_unlock_fwd_queues (t);
5968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
5970 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5971 tunnel_unlock_bck_queue (t);
5978 * Core handler for mesh network traffic point-to-point ack polls.
5980 * @param cls closure
5981 * @param message message
5982 * @param peer peer identity this notification is about
5983 * @param atsi performance data
5984 * @param atsi_count number of records in 'atsi'
5986 * @return GNUNET_OK to keep the connection open,
5987 * GNUNET_SYSERR to close it (signal serious error)
5990 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
5991 const struct GNUNET_MessageHeader *message,
5992 const struct GNUNET_ATS_Information *atsi,
5993 unsigned int atsi_count)
5995 struct GNUNET_MESH_Poll *msg;
5996 struct MeshTunnel *t;
5998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
6001 msg = (struct GNUNET_MESH_Poll *) message;
6003 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6007 /* TODO notify that we dont know this tunnel (whom)? */
6008 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
6009 GNUNET_break_op (0);
6013 /* Is this a forward or backward ACK? */
6014 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
6016 struct MeshTunnelFlowControlInfo *fcinfo;
6018 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
6019 fcinfo = tunnel_get_neighbor_fc (t, peer);
6020 fcinfo->bck_ack = fcinfo->fwd_pid; // mark as ready to send
6021 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
6025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
6026 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
6034 * Core handler for path ACKs
6036 * @param cls closure
6037 * @param message message
6038 * @param peer peer identity this notification is about
6039 * @param atsi performance data
6040 * @param atsi_count number of records in 'atsi'
6042 * @return GNUNET_OK to keep the connection open,
6043 * GNUNET_SYSERR to close it (signal serious error)
6046 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
6047 const struct GNUNET_MessageHeader *message,
6048 const struct GNUNET_ATS_Information *atsi,
6049 unsigned int atsi_count)
6051 struct GNUNET_MESH_PathACK *msg;
6052 struct GNUNET_PeerIdentity id;
6053 struct MeshPeerInfo *peer_info;
6054 struct MeshPeerPath *p;
6055 struct MeshTunnel *t;
6057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
6058 GNUNET_i2s (&my_full_id));
6059 msg = (struct GNUNET_MESH_PathACK *) message;
6060 t = tunnel_get (&msg->oid, ntohl(msg->tid));
6063 /* TODO notify that we don't know the tunnel */
6064 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
6065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
6066 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
6069 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
6070 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
6072 peer_info = peer_info_get (&msg->peer_id);
6073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
6074 GNUNET_i2s (&msg->peer_id));
6075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
6078 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
6080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6081 "connect_by_string completed, stopping search\n");
6082 regex_cancel_search (t->regex_ctx);
6083 t->regex_ctx = NULL;
6086 /* Add paths to peers? */
6087 p = tree_get_path_to_peer (t->tree, peer_info->id);
6090 path_add_to_peers (p, GNUNET_YES);
6098 /* Message for us? */
6099 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
6101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
6102 if (NULL == t->owner)
6104 GNUNET_break_op (0);
6107 if (NULL != t->dht_get_type)
6109 GNUNET_DHT_get_stop (t->dht_get_type);
6110 t->dht_get_type = NULL;
6112 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
6114 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
6115 send_client_peer_connected (t, peer_info->id);
6120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6121 " not for us, retransmitting...\n");
6122 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
6123 peer_info = peer_info_get (&msg->oid);
6124 if (NULL == peer_info)
6126 /* If we know the tunnel, we should DEFINITELY know the peer */
6130 send_prebuilt_message (message, &id, t);
6136 * Core handler for mesh keepalives.
6138 * @param cls closure
6139 * @param message message
6140 * @param peer peer identity this notification is about
6141 * @param atsi performance data
6142 * @param atsi_count number of records in 'atsi'
6143 * @return GNUNET_OK to keep the connection open,
6144 * GNUNET_SYSERR to close it (signal serious error)
6146 * TODO: Check who we got this from, to validate route.
6149 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
6150 const struct GNUNET_MessageHeader *message,
6151 const struct GNUNET_ATS_Information *atsi,
6152 unsigned int atsi_count)
6154 struct GNUNET_MESH_TunnelKeepAlive *msg;
6155 struct MeshTunnel *t;
6157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
6160 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
6161 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6165 /* TODO notify that we dont know that tunnel */
6166 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1, GNUNET_NO);
6167 GNUNET_break_op (0);
6171 tunnel_reset_timeout (t);
6173 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
6174 tunnel_send_multicast (t, message);
6181 * Functions to handle messages from core
6183 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
6184 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
6185 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
6186 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
6187 sizeof (struct GNUNET_MESH_PathBroken)},
6188 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
6189 sizeof (struct GNUNET_MESH_TunnelDestroy)},
6190 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
6191 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
6192 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
6193 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
6194 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
6195 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
6196 sizeof (struct GNUNET_MESH_ACK)},
6197 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
6198 sizeof (struct GNUNET_MESH_Poll)},
6199 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
6200 sizeof (struct GNUNET_MESH_PathACK)},
6206 /******************************************************************************/
6207 /**************** MESH LOCAL HANDLER HELPERS ***********************/
6208 /******************************************************************************/
6211 * deregister_app: iterator for removing each application registered by a client
6213 * @param cls closure
6214 * @param key the hash of the application id (used to access the hashmap)
6215 * @param value the value stored at the key (client)
6217 * @return GNUNET_OK on success
6220 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
6222 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
6223 GNUNET_break (GNUNET_YES ==
6224 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
6230 * notify_client_connection_failure: notify a client that the connection to the
6231 * requested remote peer is not possible (for instance, no route found)
6232 * Function called when the socket is ready to queue more data. "buf" will be
6233 * NULL and "size" zero if the socket was closed for writing in the meantime.
6235 * @param cls closure
6236 * @param size number of bytes available in buf
6237 * @param buf where the callee should write the message
6238 * @return number of bytes written to buf
6241 notify_client_connection_failure (void *cls, size_t size, void *buf)
6244 struct MeshPeerInfo *peer_info;
6245 struct GNUNET_MESH_PeerControl *msg;
6246 struct GNUNET_PeerIdentity id;
6248 if (0 == size && NULL == buf)
6250 // TODO retry? cancel?
6254 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
6255 peer_info = (struct MeshPeerInfo *) cls;
6256 msg = (struct GNUNET_MESH_PeerControl *) buf;
6257 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
6258 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
6259 // msg->tunnel_id = htonl(peer_info->t->tid);
6260 GNUNET_PEER_resolve (peer_info->id, &id);
6261 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
6269 * Send keepalive packets for a peer
6271 * @param cls Closure (tunnel for which to send the keepalive).
6272 * @param tc Notification context.
6275 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6277 struct MeshTunnel *t = cls;
6278 struct GNUNET_MESH_TunnelKeepAlive *msg;
6279 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
6282 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
6283 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
6288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6289 "sending keepalive for tunnel %d\n", t->id.tid);
6291 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
6292 msg->header.size = htons (size);
6293 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
6294 msg->oid = my_full_id;
6295 msg->tid = htonl (t->id.tid);
6296 tunnel_send_multicast (t, &msg->header);
6298 t->path_refresh_task =
6299 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
6300 tunnel_reset_timeout(t);
6305 * Function to process paths received for a new peer addition. The recorded
6306 * paths form the initial tunnel, which can be optimized later.
6307 * Called on each result obtained for the DHT search.
6309 * @param cls closure
6310 * @param exp when will this value expire
6311 * @param key key of the result
6312 * @param get_path path of the get request
6313 * @param get_path_length lenght of get_path
6314 * @param put_path path of the put request
6315 * @param put_path_length length of the put_path
6316 * @param type type of the result
6317 * @param size number of bytes in data
6318 * @param data pointer to the result data
6320 * TODO: re-issue the request after certain time? cancel after X results?
6323 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6324 const struct GNUNET_HashCode * key,
6325 const struct GNUNET_PeerIdentity *get_path,
6326 unsigned int get_path_length,
6327 const struct GNUNET_PeerIdentity *put_path,
6328 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6329 size_t size, const void *data)
6331 struct MeshPathInfo *path_info = cls;
6332 struct MeshPeerPath *p;
6333 struct GNUNET_PeerIdentity pi;
6336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
6337 GNUNET_PEER_resolve (path_info->peer->id, &pi);
6338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
6340 p = path_build_from_dht (get_path, get_path_length, put_path,
6342 path_add_to_peers (p, GNUNET_NO);
6344 for (i = 0; i < path_info->peer->ntunnels; i++)
6346 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
6347 peer_info_connect (path_info->peer, path_info->t);
6355 * Function to process paths received for a new peer addition. The recorded
6356 * paths form the initial tunnel, which can be optimized later.
6357 * Called on each result obtained for the DHT search.
6359 * @param cls closure
6360 * @param exp when will this value expire
6361 * @param key key of the result
6362 * @param get_path path of the get request
6363 * @param get_path_length lenght of get_path
6364 * @param put_path path of the put request
6365 * @param put_path_length length of the put_path
6366 * @param type type of the result
6367 * @param size number of bytes in data
6368 * @param data pointer to the result data
6371 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6372 const struct GNUNET_HashCode * key,
6373 const struct GNUNET_PeerIdentity *get_path,
6374 unsigned int get_path_length,
6375 const struct GNUNET_PeerIdentity *put_path,
6376 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6377 size_t size, const void *data)
6379 const struct PBlock *pb = data;
6380 const struct GNUNET_PeerIdentity *pi = &pb->id;
6381 struct MeshTunnel *t = cls;
6382 struct MeshPeerInfo *peer_info;
6383 struct MeshPeerPath *p;
6385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
6386 if (size != sizeof (struct PBlock))
6388 GNUNET_break_op (0);
6391 if (ntohl(pb->type) != t->type)
6393 GNUNET_break_op (0);
6396 GNUNET_assert (NULL != t->owner);
6397 peer_info = peer_info_get (pi);
6398 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
6400 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
6402 p = path_build_from_dht (get_path, get_path_length, put_path,
6404 path_add_to_peers (p, GNUNET_NO);
6406 tunnel_add_peer (t, peer_info);
6407 peer_info_connect (peer_info, t);
6412 * Function to process DHT string to regex matching.
6413 * Called on each result obtained for the DHT search.
6415 * @param cls closure (search context)
6416 * @param exp when will this value expire
6417 * @param key key of the result
6418 * @param get_path path of the get request (not used)
6419 * @param get_path_length lenght of get_path (not used)
6420 * @param put_path path of the put request (not used)
6421 * @param put_path_length length of the put_path (not used)
6422 * @param type type of the result
6423 * @param size number of bytes in data
6424 * @param data pointer to the result data
6427 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6428 const struct GNUNET_HashCode * key,
6429 const struct GNUNET_PeerIdentity *get_path,
6430 unsigned int get_path_length,
6431 const struct GNUNET_PeerIdentity *put_path,
6432 unsigned int put_path_length,
6433 enum GNUNET_BLOCK_Type type,
6434 size_t size, const void *data)
6436 const struct MeshRegexAccept *block = data;
6437 struct MeshRegexSearchContext *ctx = cls;
6438 struct MeshRegexSearchInfo *info = ctx->info;
6439 struct MeshPeerPath *p;
6440 struct MeshPeerInfo *peer_info;
6442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
6443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
6445 peer_info = peer_info_get(&block->id);
6446 p = path_build_from_dht (get_path, get_path_length, put_path,
6448 path_add_to_peers (p, GNUNET_NO);
6451 tunnel_add_peer (info->t, peer_info);
6452 peer_info_connect (peer_info, info->t);
6453 if (0 == info->peer)
6455 info->peer = peer_info->id;
6459 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
6462 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
6463 ®ex_connect_timeout,
6471 * Function to process DHT string to regex matching.
6472 * Called on each result obtained for the DHT search.
6474 * @param cls closure (search context)
6475 * @param exp when will this value expire
6476 * @param key key of the result
6477 * @param get_path path of the get request (not used)
6478 * @param get_path_length lenght of get_path (not used)
6479 * @param put_path path of the put request (not used)
6480 * @param put_path_length length of the put_path (not used)
6481 * @param type type of the result
6482 * @param size number of bytes in data
6483 * @param data pointer to the result data
6485 * TODO: re-issue the request after certain time? cancel after X results?
6488 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6489 const struct GNUNET_HashCode * key,
6490 const struct GNUNET_PeerIdentity *get_path,
6491 unsigned int get_path_length,
6492 const struct GNUNET_PeerIdentity *put_path,
6493 unsigned int put_path_length,
6494 enum GNUNET_BLOCK_Type type,
6495 size_t size, const void *data)
6497 const struct MeshRegexBlock *block = data;
6498 struct MeshRegexSearchContext *ctx = cls;
6499 struct MeshRegexSearchInfo *info = ctx->info;
6503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6504 "DHT GET STRING RETURNED RESULTS\n");
6505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6506 " key: %s\n", GNUNET_h2s (key));
6508 copy = GNUNET_malloc (size);
6509 memcpy (copy, data, size);
6510 GNUNET_break (GNUNET_OK ==
6511 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
6512 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
6513 len = ntohl (block->n_proof);
6515 char proof[len + 1];
6517 memcpy (proof, &block[1], len);
6519 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
6521 GNUNET_break_op (0);
6525 len = strlen (info->description);
6526 if (len == ctx->position) // String processed
6528 if (GNUNET_YES == ntohl (block->accepting))
6530 regex_find_path(key, ctx);
6534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
6535 // FIXME REGEX this block not successful, wait for more? start timeout?
6540 regex_next_edge (block, size, ctx);
6545 /******************************************************************************/
6546 /********************* MESH LOCAL HANDLES **************************/
6547 /******************************************************************************/
6551 * Handler for client disconnection
6553 * @param cls closure
6554 * @param client identification of the client; NULL
6555 * for the last call when the server is destroyed
6558 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
6560 struct MeshClient *c;
6561 struct MeshClient *next;
6564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
6567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
6573 if (c->handle != client)
6575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
6579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
6581 GNUNET_SERVER_client_drop (c->handle);
6582 c->shutting_down = GNUNET_YES;
6583 GNUNET_assert (NULL != c->own_tunnels);
6584 GNUNET_assert (NULL != c->incoming_tunnels);
6585 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
6586 &tunnel_destroy_iterator, c);
6587 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
6588 &tunnel_destroy_iterator, c);
6589 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
6590 &tunnel_destroy_iterator, c);
6591 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
6592 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
6593 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
6595 /* deregister clients applications */
6596 if (NULL != c->apps)
6598 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
6599 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
6601 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
6602 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
6604 GNUNET_SCHEDULER_cancel (announce_applications_task);
6605 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
6607 if (NULL != c->types)
6608 GNUNET_CONTAINER_multihashmap_destroy (c->types);
6609 for (i = 0; i < c->n_regex; i++)
6611 GNUNET_free (c->regexes[i].regex);
6613 GNUNET_free_non_null (c->regexes);
6614 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
6615 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
6617 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
6618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
6620 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
6623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
6629 * Handler for new clients
6631 * @param cls closure
6632 * @param client identification of the client
6633 * @param message the actual message, which includes messages the client wants
6636 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
6637 const struct GNUNET_MessageHeader *message)
6639 struct GNUNET_MESH_ClientConnect *cc_msg;
6640 struct MeshClient *c;
6641 GNUNET_MESH_ApplicationType *a;
6648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
6649 /* Check data sanity */
6650 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
6651 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
6652 ntypes = ntohs (cc_msg->types);
6653 napps = ntohs (cc_msg->applications);
6655 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
6658 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6662 /* Create new client structure */
6663 c = GNUNET_malloc (sizeof (struct MeshClient));
6664 c->id = next_client_id++;
6665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
6667 GNUNET_SERVER_client_keep (client);
6668 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
6671 GNUNET_MESH_ApplicationType at;
6672 struct GNUNET_HashCode hc;
6674 c->apps = GNUNET_CONTAINER_multihashmap_create (napps, GNUNET_NO);
6675 for (i = 0; i < napps; i++)
6678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
6679 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
6680 /* store in clients hashmap */
6681 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
6682 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6683 /* store in global hashmap, for announcements */
6684 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
6685 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6687 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
6688 announce_applications_task =
6689 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
6695 struct GNUNET_HashCode hc;
6697 t = (uint16_t *) & a[napps];
6698 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes, GNUNET_NO);
6699 for (i = 0; i < ntypes; i++)
6702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
6703 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
6705 /* store in clients hashmap */
6706 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
6707 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6708 /* store in global hashmap */
6709 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
6710 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6714 " client has %u+%u subscriptions\n", napps, ntypes);
6716 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
6717 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6718 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6719 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6720 GNUNET_SERVER_notification_context_add (nc, client);
6721 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
6723 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
6729 * Handler for clients announcing available services by a regular expression.
6731 * @param cls closure
6732 * @param client identification of the client
6733 * @param message the actual message, which includes messages the client wants
6736 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
6737 const struct GNUNET_MessageHeader *message)
6739 struct GNUNET_MESH_RegexAnnounce *msg;
6740 struct MeshRegexDescriptor rd;
6741 struct MeshClient *c;
6745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
6747 /* Sanity check for client registration */
6748 if (NULL == (c = client_get (client)))
6751 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6756 msg = (struct GNUNET_MESH_RegexAnnounce *) message;
6757 len = ntohs (message->size) - sizeof(struct GNUNET_MESH_RegexAnnounce);
6758 regex = GNUNET_malloc (len + 1);
6759 memcpy (regex, &msg[1], len);
6762 rd.compression = ntohs (msg->compression_characters);
6763 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " length %u\n", len);
6764 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regex %s\n", regex);
6765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " cm %u\n", ntohs(rd.compression));
6766 GNUNET_array_append (c->regexes, c->n_regex, rd);
6767 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
6769 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
6775 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
6781 * Handler for requests of new tunnels
6783 * @param cls closure
6784 * @param client identification of the client
6785 * @param message the actual message
6788 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
6789 const struct GNUNET_MessageHeader *message)
6791 struct GNUNET_MESH_TunnelMessage *t_msg;
6792 struct MeshTunnel *t;
6793 struct MeshClient *c;
6794 MESH_TunnelNumber tid;
6796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
6798 /* Sanity check for client registration */
6799 if (NULL == (c = client_get (client)))
6802 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6807 /* Message sanity check */
6808 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6811 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6815 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6816 /* Sanity check for tunnel numbering */
6817 tid = ntohl (t_msg->tunnel_id);
6818 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
6821 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6824 /* Sanity check for duplicate tunnel IDs */
6825 if (NULL != tunnel_get_by_local_id (c, tid))
6828 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6832 while (NULL != tunnel_get_by_pi (myid, next_tid))
6833 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6834 t = tunnel_new (myid, next_tid++, c, tid);
6837 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
6839 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6842 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
6844 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
6845 t->peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6847 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
6848 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6854 * Handler for requests of deleting tunnels
6856 * @param cls closure
6857 * @param client identification of the client
6858 * @param message the actual message
6861 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
6862 const struct GNUNET_MessageHeader *message)
6864 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6865 struct MeshClient *c;
6866 struct MeshTunnel *t;
6867 MESH_TunnelNumber tid;
6869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6870 "Got a DESTROY TUNNEL from client!\n");
6872 /* Sanity check for client registration */
6873 if (NULL == (c = client_get (client)))
6876 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6881 /* Message sanity check */
6882 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6885 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6889 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6891 /* Retrieve tunnel */
6892 tid = ntohl (tunnel_msg->tunnel_id);
6893 t = tunnel_get_by_local_id(c, tid);
6896 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6898 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6901 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6903 client_ignore_tunnel (c, t);
6905 // TODO: when to destroy incoming tunnel?
6906 if (t->nclients == 0)
6908 GNUNET_assert (GNUNET_YES ==
6909 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
6911 GNUNET_assert (GNUNET_YES ==
6912 GNUNET_CONTAINER_multihashmap_remove (t->peers,
6913 &my_full_id.hashPubKey,
6917 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6920 send_client_tunnel_disconnect(t, c);
6921 client_delete_tunnel(c, t);
6923 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
6925 tunnel_send_destroy (t);
6926 t->destroy = GNUNET_YES;
6927 // The tunnel will be destroyed when the last message is transmitted.
6928 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6934 * Handler for requests of seeting tunnel's speed.
6936 * @param cls Closure (unused).
6937 * @param client Identification of the client.
6938 * @param message The actual message.
6941 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
6942 const struct GNUNET_MessageHeader *message)
6944 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6945 struct MeshClient *c;
6946 struct MeshTunnel *t;
6947 MESH_TunnelNumber tid;
6949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6950 "Got a SPEED request from client!\n");
6952 /* Sanity check for client registration */
6953 if (NULL == (c = client_get (client)))
6956 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6960 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6962 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6964 /* Retrieve tunnel */
6965 tid = ntohl (tunnel_msg->tunnel_id);
6966 t = tunnel_get_by_local_id(c, tid);
6969 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
6971 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6975 switch (ntohs(message->type))
6977 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
6978 t->speed_min = GNUNET_YES;
6980 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
6981 t->speed_min = GNUNET_NO;
6986 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6991 * Handler for requests of seeting tunnel's buffering policy.
6993 * @param cls Closure (unused).
6994 * @param client Identification of the client.
6995 * @param message The actual message.
6998 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
6999 const struct GNUNET_MessageHeader *message)
7001 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
7002 struct MeshClient *c;
7003 struct MeshTunnel *t;
7004 MESH_TunnelNumber tid;
7006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7007 "Got a BUFFER request from client!\n");
7009 /* Sanity check for client registration */
7010 if (NULL == (c = client_get (client)))
7013 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7016 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7018 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
7020 /* Retrieve tunnel */
7021 tid = ntohl (tunnel_msg->tunnel_id);
7022 t = tunnel_get_by_local_id(c, tid);
7025 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
7027 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7031 switch (ntohs(message->type))
7033 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
7034 t->nobuffer = GNUNET_NO;
7036 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
7037 t->nobuffer = GNUNET_YES;
7043 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7048 * Handler for connection requests to new peers
7050 * @param cls closure
7051 * @param client identification of the client
7052 * @param message the actual message (PeerControl)
7055 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
7056 const struct GNUNET_MessageHeader *message)
7058 struct GNUNET_MESH_PeerControl *peer_msg;
7059 struct MeshPeerInfo *peer_info;
7060 struct MeshClient *c;
7061 struct MeshTunnel *t;
7062 MESH_TunnelNumber tid;
7064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
7065 /* Sanity check for client registration */
7066 if (NULL == (c = client_get (client)))
7069 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7074 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7076 /* Sanity check for message size */
7077 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7080 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7084 /* Tunnel exists? */
7085 tid = ntohl (peer_msg->tunnel_id);
7086 t = tunnel_get_by_local_id (c, tid);
7090 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7094 /* Does client own tunnel? */
7095 if (t->owner->handle != client)
7098 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
7102 GNUNET_i2s (&peer_msg->peer));
7103 peer_info = peer_info_get (&peer_msg->peer);
7105 tunnel_add_peer (t, peer_info);
7106 peer_info_connect (peer_info, t);
7108 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7114 * Handler for disconnection requests of peers in a tunnel
7116 * @param cls closure
7117 * @param client identification of the client
7118 * @param message the actual message (PeerControl)
7121 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
7122 const struct GNUNET_MessageHeader *message)
7124 struct GNUNET_MESH_PeerControl *peer_msg;
7125 struct MeshPeerInfo *peer_info;
7126 struct MeshClient *c;
7127 struct MeshTunnel *t;
7128 MESH_TunnelNumber tid;
7130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
7131 /* Sanity check for client registration */
7132 if (NULL == (c = client_get (client)))
7135 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7140 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7142 /* Sanity check for message size */
7143 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7146 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7150 /* Tunnel exists? */
7151 tid = ntohl (peer_msg->tunnel_id);
7152 t = tunnel_get_by_local_id (c, tid);
7156 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7161 /* Does client own tunnel? */
7162 if (t->owner->handle != client)
7165 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
7170 GNUNET_i2s (&peer_msg->peer));
7171 /* Is the peer in the tunnel? */
7173 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
7174 if (NULL == peer_info)
7177 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7181 /* Ok, delete peer from tunnel */
7182 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
7183 &peer_msg->peer.hashPubKey);
7185 send_destroy_path (t, peer_info->id);
7186 tunnel_delete_peer (t, peer_info->id);
7187 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7192 * Handler for blacklist requests of peers in a tunnel
7194 * @param cls closure
7195 * @param client identification of the client
7196 * @param message the actual message (PeerControl)
7198 * FIXME implement DHT block bloomfilter
7201 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
7202 const struct GNUNET_MessageHeader *message)
7204 struct GNUNET_MESH_PeerControl *peer_msg;
7205 struct MeshClient *c;
7206 struct MeshTunnel *t;
7207 MESH_TunnelNumber tid;
7209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
7210 /* Sanity check for client registration */
7211 if (NULL == (c = client_get (client)))
7214 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7217 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7219 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7221 /* Sanity check for message size */
7222 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7225 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7229 /* Tunnel exists? */
7230 tid = ntohl (peer_msg->tunnel_id);
7231 t = tunnel_get_by_local_id (c, tid);
7235 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7240 GNUNET_array_append(t->blacklisted, t->nblacklisted,
7241 GNUNET_PEER_intern(&peer_msg->peer));
7246 * Handler for unblacklist requests of peers in a tunnel
7248 * @param cls closure
7249 * @param client identification of the client
7250 * @param message the actual message (PeerControl)
7253 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
7254 const struct GNUNET_MessageHeader *message)
7256 struct GNUNET_MESH_PeerControl *peer_msg;
7257 struct MeshClient *c;
7258 struct MeshTunnel *t;
7259 MESH_TunnelNumber tid;
7263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
7264 /* Sanity check for client registration */
7265 if (NULL == (c = client_get (client)))
7268 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7273 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7275 /* Sanity check for message size */
7276 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7279 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7283 /* Tunnel exists? */
7284 tid = ntohl (peer_msg->tunnel_id);
7285 t = tunnel_get_by_local_id (c, tid);
7289 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7294 /* if peer is not known, complain */
7295 pid = GNUNET_PEER_search (&peer_msg->peer);
7302 /* search and remove from list */
7303 for (i = 0; i < t->nblacklisted; i++)
7305 if (t->blacklisted[i] == pid)
7307 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
7308 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
7313 /* if peer hasn't been blacklisted, complain */
7319 * Handler for connection requests to new peers by type
7321 * @param cls closure
7322 * @param client identification of the client
7323 * @param message the actual message (ConnectPeerByType)
7326 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
7327 const struct GNUNET_MessageHeader *message)
7329 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
7330 struct MeshClient *c;
7331 struct MeshTunnel *t;
7332 struct GNUNET_HashCode hash;
7333 MESH_TunnelNumber tid;
7335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
7336 /* Sanity check for client registration */
7337 if (NULL == (c = client_get (client)))
7340 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7345 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
7347 /* Sanity check for message size */
7348 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
7349 ntohs (connect_msg->header.size))
7352 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7356 /* Tunnel exists? */
7357 tid = ntohl (connect_msg->tunnel_id);
7358 t = tunnel_get_by_local_id (c, tid);
7362 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7366 /* Does client own tunnel? */
7367 if (t->owner->handle != client)
7370 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7374 /* Do WE have the service? */
7375 t->type = ntohl (connect_msg->type);
7376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
7377 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
7378 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
7381 /* Yes! Fast forward, add ourselves to the tunnel and send the
7382 * good news to the client, and alert the destination client of
7383 * an incoming tunnel.
7385 * FIXME send a path create to self, avoid code duplication
7387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
7388 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
7389 peer_info_get (&my_full_id),
7390 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
7393 send_client_peer_connected (t, myid);
7394 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
7395 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7397 t->local_tid_dest = next_local_tid++;
7398 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
7399 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
7400 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7404 /* Ok, lets find a peer offering the service */
7405 if (NULL != t->dht_get_type)
7407 GNUNET_DHT_get_stop (t->dht_get_type);
7409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
7410 GNUNET_h2s (&hash));
7412 GNUNET_DHT_get_start (dht_handle,
7413 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
7415 dht_replication_level,
7416 GNUNET_DHT_RO_RECORD_ROUTE |
7417 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7419 &dht_get_type_handler, t);
7421 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7427 * Handler for connection requests to new peers by a string service description.
7429 * @param cls closure
7430 * @param client identification of the client
7431 * @param message the actual message, which includes messages the client wants
7434 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
7435 const struct GNUNET_MessageHeader *message)
7437 struct GNUNET_MESH_ConnectPeerByString *msg;
7438 struct MeshRegexSearchContext *ctx;
7439 struct MeshRegexSearchInfo *info;
7440 struct GNUNET_DHT_GetHandle *get_h;
7441 struct GNUNET_HashCode key;
7442 struct MeshTunnel *t;
7443 struct MeshClient *c;
7444 MESH_TunnelNumber tid;
7448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7449 "Connect by string started\n");
7450 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
7451 size = htons (message->size);
7453 /* Sanity check for client registration */
7454 if (NULL == (c = client_get (client)))
7457 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7460 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7462 /* Message size sanity check */
7463 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
7466 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7470 /* Tunnel exists? */
7471 tid = ntohl (msg->tunnel_id);
7472 t = tunnel_get_by_local_id (c, tid);
7476 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7480 /* Does client own tunnel? */
7481 if (t->owner->handle != client)
7484 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7489 " on tunnel %s [%u]\n",
7490 GNUNET_i2s(&my_full_id),
7493 /* Only one connect_by_string allowed at the same time! */
7494 /* FIXME: allow more, return handle at api level to cancel, document */
7495 if (NULL != t->regex_ctx)
7498 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7502 /* Find string itself */
7503 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
7504 string = (const char *) &msg[1];
7506 /* Initialize context */
7507 size = GNUNET_REGEX_get_first_key(string, len, &key);
7508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7509 " consumed %u bits out of %u\n", size, len);
7510 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7511 " looking for %s\n", GNUNET_h2s (&key));
7513 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
7515 info->description = GNUNET_malloc (len + 1);
7516 memcpy (info->description, string, len);
7517 info->description[len] = '\0';
7518 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32, GNUNET_NO);
7519 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32, GNUNET_NO);
7520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
7522 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
7523 ctx->position = size;
7527 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
7529 /* Start search in DHT */
7530 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
7531 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
7532 &key, /* key to search */
7533 dht_replication_level, /* replication level */
7534 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7535 NULL, /* xquery */ // FIXME BLOOMFILTER
7536 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
7537 &dht_get_string_handler, ctx);
7539 GNUNET_break (GNUNET_OK ==
7540 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
7543 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
7545 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
7551 * Handler for client traffic directed to one peer
7553 * @param cls closure
7554 * @param client identification of the client
7555 * @param message the actual message
7558 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
7559 const struct GNUNET_MessageHeader *message)
7561 struct MeshClient *c;
7562 struct MeshTunnel *t;
7563 struct MeshPeerInfo *pi;
7564 struct GNUNET_MESH_Unicast *data_msg;
7565 MESH_TunnelNumber tid;
7568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7569 "Got a unicast request from a client!\n");
7571 /* Sanity check for client registration */
7572 if (NULL == (c = client_get (client)))
7575 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7580 data_msg = (struct GNUNET_MESH_Unicast *) message;
7582 /* Sanity check for message size */
7583 size = ntohs (message->size);
7584 if (sizeof (struct GNUNET_MESH_Unicast) +
7585 sizeof (struct GNUNET_MessageHeader) > size)
7588 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7592 /* Tunnel exists? */
7593 tid = ntohl (data_msg->tid);
7594 t = tunnel_get_by_local_id (c, tid);
7598 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7602 /* Is it a local tunnel? Then, does client own the tunnel? */
7603 if (t->owner->handle != client)
7606 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7610 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
7611 &data_msg->destination.hashPubKey);
7612 /* Is the selected peer in the tunnel? */
7616 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7620 /* PID should be as expected */
7621 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7624 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7625 "Unicast PID, expected %u, got %u\n",
7626 t->fwd_pid + 1, ntohl (data_msg->pid));
7627 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7631 /* Ok, everything is correct, send the message
7632 * (pretend we got it from a mesh peer)
7635 /* Work around const limitation */
7636 char buf[ntohs (message->size)] GNUNET_ALIGN;
7637 struct GNUNET_MESH_Unicast *copy;
7639 copy = (struct GNUNET_MESH_Unicast *) buf;
7640 memcpy (buf, data_msg, size);
7641 copy->oid = my_full_id;
7642 copy->tid = htonl (t->id.tid);
7643 copy->ttl = htonl (default_ttl);
7644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7645 " calling generic handler...\n");
7646 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
7648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
7649 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7656 * Handler for client traffic directed to the origin
7658 * @param cls closure
7659 * @param client identification of the client
7660 * @param message the actual message
7663 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
7664 const struct GNUNET_MessageHeader *message)
7666 struct GNUNET_MESH_ToOrigin *data_msg;
7667 struct MeshTunnelFlowControlInfo *fcinfo;
7668 struct MeshClient *c;
7669 struct MeshTunnel *t;
7670 MESH_TunnelNumber tid;
7673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7674 "Got a ToOrigin request from a client!\n");
7675 /* Sanity check for client registration */
7676 if (NULL == (c = client_get (client)))
7679 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7684 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
7686 /* Sanity check for message size */
7687 size = ntohs (message->size);
7688 if (sizeof (struct GNUNET_MESH_ToOrigin) +
7689 sizeof (struct GNUNET_MessageHeader) > size)
7692 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7696 /* Tunnel exists? */
7697 tid = ntohl (data_msg->tid);
7698 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7699 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
7702 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7705 t = tunnel_get_by_local_id (c, tid);
7708 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7709 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7711 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7715 /* It should be sent by someone who has this as incoming tunnel. */
7716 if (GNUNET_NO == client_knows_tunnel (c, t))
7719 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7723 /* PID should be as expected */
7724 fcinfo = tunnel_get_client_fc (t, c);
7725 if (ntohl (data_msg->pid) != fcinfo->bck_pid + 1)
7728 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7729 "To Origin PID, expected %u, got %u\n",
7730 fcinfo->bck_pid + 1,
7731 ntohl (data_msg->pid));
7732 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7737 /* Ok, everything is correct, send the message
7738 * (pretend we got it from a mesh peer)
7741 char buf[ntohs (message->size)] GNUNET_ALIGN;
7742 struct GNUNET_MESH_ToOrigin *copy;
7744 /* Work around const limitation */
7745 copy = (struct GNUNET_MESH_ToOrigin *) buf;
7746 memcpy (buf, data_msg, size);
7747 GNUNET_PEER_resolve (t->id.oid, ©->oid);
7748 copy->tid = htonl (t->id.tid);
7749 copy->ttl = htonl (default_ttl);
7750 copy->pid = htonl (t->bck_pid + 1);
7752 copy->sender = my_full_id;
7753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7754 " calling generic handler...\n");
7755 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
7757 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7764 * Handler for client traffic directed to all peers in a tunnel
7766 * @param cls closure
7767 * @param client identification of the client
7768 * @param message the actual message
7771 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
7772 const struct GNUNET_MessageHeader *message)
7774 struct MeshClient *c;
7775 struct MeshTunnel *t;
7776 struct GNUNET_MESH_Multicast *data_msg;
7777 MESH_TunnelNumber tid;
7779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7780 "Got a multicast request from a client!\n");
7782 /* Sanity check for client registration */
7783 if (NULL == (c = client_get (client)))
7786 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7791 data_msg = (struct GNUNET_MESH_Multicast *) message;
7793 /* Sanity check for message size */
7794 if (sizeof (struct GNUNET_MESH_Multicast) +
7795 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
7798 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7802 /* Tunnel exists? */
7803 tid = ntohl (data_msg->tid);
7804 t = tunnel_get_by_local_id (c, tid);
7808 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7809 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7811 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7815 /* Does client own tunnel? */
7816 if (t->owner->handle != client)
7819 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7823 /* PID should be as expected */
7824 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7827 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7828 "Multicast PID, expected %u, got %u\n",
7829 t->fwd_pid + 1, ntohl (data_msg->pid));
7830 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7835 char buf[ntohs (message->size)] GNUNET_ALIGN;
7836 struct GNUNET_MESH_Multicast *copy;
7838 copy = (struct GNUNET_MESH_Multicast *) buf;
7839 memcpy (buf, message, ntohs (message->size));
7840 copy->oid = my_full_id;
7841 copy->tid = htonl (t->id.tid);
7842 copy->ttl = htonl (default_ttl);
7843 GNUNET_assert (ntohl (copy->pid) == (t->fwd_pid + 1));
7844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7845 " calling generic handler...\n");
7846 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
7849 GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
7855 * Handler for client's ACKs for payload traffic.
7857 * @param cls Closure (unused).
7858 * @param client Identification of the client.
7859 * @param message The actual message.
7862 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
7863 const struct GNUNET_MessageHeader *message)
7865 struct GNUNET_MESH_LocalAck *msg;
7866 struct MeshTunnel *t;
7867 struct MeshClient *c;
7868 MESH_TunnelNumber tid;
7871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
7872 /* Sanity check for client registration */
7873 if (NULL == (c = client_get (client)))
7876 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7881 msg = (struct GNUNET_MESH_LocalAck *) message;
7883 /* Tunnel exists? */
7884 tid = ntohl (msg->tunnel_id);
7885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7886 t = tunnel_get_by_local_id (c, tid);
7890 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7891 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7892 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7896 ack = ntohl (msg->max_pid);
7897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
7899 /* Does client own tunnel? I.E: Is this and ACK for BCK traffic? */
7900 if (NULL != t->owner && t->owner->handle == client)
7902 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
7904 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7908 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
7909 tunnel_set_client_fwd_ack (t, c, ack);
7910 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7913 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7920 * Functions to handle messages from clients
7922 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
7923 {&handle_local_new_client, NULL,
7924 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
7925 {&handle_local_announce_regex, NULL,
7926 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
7927 {&handle_local_tunnel_create, NULL,
7928 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
7929 sizeof (struct GNUNET_MESH_TunnelMessage)},
7930 {&handle_local_tunnel_destroy, NULL,
7931 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
7932 sizeof (struct GNUNET_MESH_TunnelMessage)},
7933 {&handle_local_tunnel_speed, NULL,
7934 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
7935 sizeof (struct GNUNET_MESH_TunnelMessage)},
7936 {&handle_local_tunnel_speed, NULL,
7937 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
7938 sizeof (struct GNUNET_MESH_TunnelMessage)},
7939 {&handle_local_tunnel_buffer, NULL,
7940 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
7941 sizeof (struct GNUNET_MESH_TunnelMessage)},
7942 {&handle_local_tunnel_buffer, NULL,
7943 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
7944 sizeof (struct GNUNET_MESH_TunnelMessage)},
7945 {&handle_local_connect_add, NULL,
7946 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
7947 sizeof (struct GNUNET_MESH_PeerControl)},
7948 {&handle_local_connect_del, NULL,
7949 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
7950 sizeof (struct GNUNET_MESH_PeerControl)},
7951 {&handle_local_blacklist, NULL,
7952 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
7953 sizeof (struct GNUNET_MESH_PeerControl)},
7954 {&handle_local_unblacklist, NULL,
7955 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
7956 sizeof (struct GNUNET_MESH_PeerControl)},
7957 {&handle_local_connect_by_type, NULL,
7958 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
7959 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
7960 {&handle_local_connect_by_string, NULL,
7961 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
7962 {&handle_local_unicast, NULL,
7963 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
7964 {&handle_local_to_origin, NULL,
7965 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
7966 {&handle_local_multicast, NULL,
7967 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
7968 {&handle_local_ack, NULL,
7969 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
7970 sizeof (struct GNUNET_MESH_LocalAck)},
7976 * To be called on core init/fail.
7978 * @param cls service closure
7979 * @param server handle to the server for this service
7980 * @param identity the public identity of this peer
7983 core_init (void *cls, struct GNUNET_CORE_Handle *server,
7984 const struct GNUNET_PeerIdentity *identity)
7987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
7988 core_handle = server;
7989 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
7992 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
7993 GNUNET_SCHEDULER_shutdown (); // Try gracefully
7995 GNUNET_abort(); // Try harder
8002 * Method called whenever a given peer connects.
8004 * @param cls closure
8005 * @param peer peer identity this notification is about
8006 * @param atsi performance data for the connection
8007 * @param atsi_count number of records in 'atsi'
8010 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
8011 const struct GNUNET_ATS_Information *atsi,
8012 unsigned int atsi_count)
8014 struct MeshPeerInfo *peer_info;
8015 struct MeshPeerPath *path;
8017 DEBUG_CONN ("Peer connected\n");
8018 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
8019 peer_info = peer_info_get (peer);
8020 if (myid == peer_info->id)
8022 DEBUG_CONN (" (self)\n");
8027 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
8029 path = path_new (2);
8030 path->peers[0] = myid;
8031 path->peers[1] = peer_info->id;
8032 GNUNET_PEER_change_rc (myid, 1);
8033 GNUNET_PEER_change_rc (peer_info->id, 1);
8034 peer_info_add_path (peer_info, path, GNUNET_YES);
8035 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
8041 * Method called whenever a peer disconnects.
8043 * @param cls closure
8044 * @param peer peer identity this notification is about
8047 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
8049 struct MeshPeerInfo *pi;
8050 struct MeshPeerQueue *q;
8051 struct MeshPeerQueue *n;
8053 DEBUG_CONN ("Peer disconnected\n");
8054 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
8064 /* TODO try to reroute this traffic instead */
8065 queue_destroy(q, GNUNET_YES);
8068 if (NULL != pi->core_transmit)
8070 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
8071 pi->core_transmit = NULL;
8073 peer_info_remove_path (pi, pi->id, myid);
8076 DEBUG_CONN (" (self)\n");
8078 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
8083 /******************************************************************************/
8084 /************************ MAIN FUNCTIONS ****************************/
8085 /******************************************************************************/
8088 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
8090 * @param cls closure
8091 * @param key current key code
8092 * @param value value in the hash map
8093 * @return GNUNET_YES if we should continue to iterate,
8097 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
8099 struct MeshTunnel *t = value;
8106 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
8108 * @param cls closure
8109 * @param key current key code
8110 * @param value value in the hash map
8111 * @return GNUNET_YES if we should continue to iterate,
8115 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
8117 struct MeshPeerInfo *p = value;
8118 struct MeshPeerQueue *q;
8119 struct MeshPeerQueue *n;
8127 queue_destroy(q, GNUNET_YES);
8131 peer_info_destroy (p);
8137 * Task run during shutdown.
8143 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
8145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
8147 if (core_handle != NULL)
8149 GNUNET_CORE_disconnect (core_handle);
8154 GNUNET_CRYPTO_rsa_key_create_stop (keygen);
8157 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
8158 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
8159 if (dht_handle != NULL)
8161 GNUNET_DHT_disconnect (dht_handle);
8166 GNUNET_SERVER_notification_context_destroy (nc);
8169 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
8171 GNUNET_SCHEDULER_cancel (announce_id_task);
8172 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
8174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
8179 * Callback for hostkey read/generation
8182 * @param pk the private key
8183 * @param emsg error message
8186 key_generation_cb (void *cls,
8187 struct GNUNET_CRYPTO_RsaPrivateKey *pk,
8190 struct MeshPeerInfo *peer;
8191 struct MeshPeerPath *p;
8196 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8197 _("Mesh service could not access hostkey. Exiting.\n"));
8198 GNUNET_SCHEDULER_shutdown ();
8201 my_private_key = pk;
8202 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
8203 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
8204 &my_full_id.hashPubKey);
8205 myid = GNUNET_PEER_intern (&my_full_id);
8206 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8207 "Mesh for peer [%s] starting\n",
8208 GNUNET_i2s(&my_full_id));
8210 // transport_handle = GNUNET_TRANSPORT_connect(c,
8220 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
8223 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
8224 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
8225 GNUNET_SERVER_disconnect_notify (server_handle,
8226 &handle_local_client_disconnect, NULL);
8230 clients_tail = NULL;
8233 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
8234 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
8236 /* Create a peer_info for the local peer */
8237 peer = peer_info_get (&my_full_id);
8240 GNUNET_PEER_change_rc (myid, 1);
8241 peer_info_add_path (peer, p, GNUNET_YES);
8242 GNUNET_SERVER_resume (server_handle);
8243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
8248 * Process mesh requests.
8250 * @param cls closure
8251 * @param server the initialized server
8252 * @param c configuration to use
8255 run (void *cls, struct GNUNET_SERVER_Handle *server,
8256 const struct GNUNET_CONFIGURATION_Handle *c)
8260 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
8261 server_handle = server;
8262 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
8263 NULL, /* Closure passed to MESH functions */
8264 &core_init, /* Call core_init once connected */
8265 &core_connect, /* Handle connects */
8266 &core_disconnect, /* remove peers on disconnects */
8267 NULL, /* Don't notify about all incoming messages */
8268 GNUNET_NO, /* For header only in notification */
8269 NULL, /* Don't notify about all outbound messages */
8270 GNUNET_NO, /* For header-only out notification */
8271 core_handlers); /* Register these handlers */
8273 if (core_handle == NULL)
8276 GNUNET_SCHEDULER_shutdown ();
8281 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
8284 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8286 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8288 GNUNET_SCHEDULER_shutdown ();
8293 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
8294 &refresh_path_time))
8296 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8298 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8299 "mesh", "refresh path time");
8300 GNUNET_SCHEDULER_shutdown ();
8305 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
8306 &app_announce_time))
8308 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8310 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8311 "mesh", "app announce time");
8312 GNUNET_SCHEDULER_shutdown ();
8315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "APP_ANNOUNCE_TIME %llu ms\n", app_announce_time.rel_value);
8318 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
8321 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8323 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8324 "mesh", "id announce time");
8325 GNUNET_SCHEDULER_shutdown ();
8333 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
8336 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8338 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8339 "mesh", "connect timeout");
8340 GNUNET_SCHEDULER_shutdown ();
8345 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
8348 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8350 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8351 "mesh", "max msgs queue");
8352 GNUNET_SCHEDULER_shutdown ();
8357 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
8360 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8362 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8363 "mesh", "max tunnels");
8364 GNUNET_SCHEDULER_shutdown ();
8369 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
8372 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8374 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8375 "mesh", "default ttl", 64);
8380 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
8381 &dht_replication_level))
8383 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8385 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8386 "mesh", "dht replication level", 10);
8387 dht_replication_level = 10;
8390 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8391 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8392 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8393 applications = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8394 types = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8396 dht_handle = GNUNET_DHT_connect (c, 64);
8397 if (NULL == dht_handle)
8401 stats = GNUNET_STATISTICS_create ("mesh", c);
8403 GNUNET_SERVER_suspend (server_handle);
8404 /* Scheduled the task to clean up when shutdown is called */
8405 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
8407 keygen = GNUNET_CRYPTO_rsa_key_create_start (keyfile, &key_generation_cb, NULL);
8408 GNUNET_free (keyfile);
8413 * The main function for the mesh service.
8415 * @param argc number of arguments from the command line
8416 * @param argv command line arguments
8417 * @return 0 ok, 1 on error
8420 main (int argc, char *const *argv)
8425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
8426 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
8428 ret = (GNUNET_OK == r) ? 0 : 1;
8429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
8433 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8434 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
8435 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);