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)
38 * - Backport r24764, r24767.
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);
3412 fcinfo.fwd_ack = t->fwd_pid + 1;
3413 fcinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
3414 fcinfo.fwd_pid = t->fwd_pid;
3415 fcinfo.bck_pid = (uint32_t) -1; // Expected next: 0
3416 fcinfo.fc_poll = GNUNET_SCHEDULER_NO_TASK;
3417 fcinfo.send_buffer = NULL;
3418 fcinfo.send_buffer_n = 0;
3419 fcinfo.send_buffer_start = 0;
3420 fcinfo.skip = t->fwd_pid;
3421 // FIXME fc buffering is done by context_notify. Confirm this is OK.
3424 GNUNET_array_append (t->clients_fc, t->nclients, fcinfo);
3429 * Notifies a tunnel that a connection has broken that affects at least
3430 * some of its peers. Sends a notification towards the root of the tree.
3431 * In case the peer is the owner of the tree, notifies the client that owns
3432 * the tunnel and tries to reconnect.
3434 * @param t Tunnel affected.
3435 * @param p1 Peer that got disconnected from p2.
3436 * @param p2 Peer that got disconnected from p1.
3438 * @return Short ID of the peer disconnected (either p1 or p2).
3439 * 0 if the tunnel remained unaffected.
3441 static GNUNET_PEER_Id
3442 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3448 tree_notify_connection_broken (t->tree, p1, p2,
3449 &tunnel_notify_client_peer_disconnected,
3451 if (myid != p1 && myid != p2)
3457 if (tree_get_predecessor (t->tree) != 0)
3459 /* We are the peer still connected, notify owner of the disconnection. */
3460 struct GNUNET_MESH_PathBroken msg;
3461 struct GNUNET_PeerIdentity neighbor;
3463 msg.header.size = htons (sizeof (msg));
3464 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3465 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3466 msg.tid = htonl (t->id.tid);
3467 msg.peer1 = my_full_id;
3468 GNUNET_PEER_resolve (pid, &msg.peer2);
3469 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3470 send_prebuilt_message (&msg.header, &neighbor, t);
3478 * Send a multicast packet to a neighbor.
3480 * @param cls Closure (Info about the multicast packet)
3481 * @param neighbor_id Short ID of the neighbor to send the packet to.
3484 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3486 struct MeshData *mdata = cls;
3487 struct MeshTransmissionDescriptor *info;
3488 struct GNUNET_PeerIdentity neighbor;
3489 struct GNUNET_MessageHeader *msg;
3491 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3493 info->mesh_data = mdata;
3494 (mdata->reference_counter) ++;
3495 info->destination = neighbor_id;
3496 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3498 GNUNET_i2s (&neighbor));
3499 info->peer = peer_info_get (&neighbor);
3500 GNUNET_assert (NULL != info->peer);
3501 msg = (struct GNUNET_MessageHeader *) mdata->data;
3504 info->mesh_data->data_len,
3511 * Queue a message in a tunnel in multicast, sending a copy to each child node
3512 * down the local one in the tunnel tree.
3514 * @param t Tunnel in which to send the data.
3515 * @param msg Message to be sent.
3518 tunnel_send_multicast (struct MeshTunnel *t,
3519 const struct GNUNET_MessageHeader *msg)
3521 struct MeshData *mdata;
3523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3524 " sending a multicast packet...\n");
3526 mdata = GNUNET_malloc (sizeof (struct MeshData));
3527 mdata->data_len = ntohs (msg->size);
3529 mdata->data = GNUNET_malloc (mdata->data_len);
3530 memcpy (mdata->data, msg, mdata->data_len);
3531 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3533 struct GNUNET_MESH_Multicast *mcast;
3535 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3536 if (t->fwd_queue_n >= t->fwd_queue_max)
3539 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " queue full!\n");
3540 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3541 " message from %s!\n",
3542 GNUNET_i2s(&mcast->oid));
3543 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3544 " message at %s!\n",
3545 GNUNET_i2s(&my_full_id));
3546 GNUNET_free (mdata->data);
3547 GNUNET_free (mdata);
3551 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3553 ntohl (mcast->ttl));
3557 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3560 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3561 if (mdata->reference_counter == 0)
3563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3564 " no one to send data to\n");
3565 GNUNET_free (mdata->data);
3566 GNUNET_free (mdata);
3571 mdata->total_out = mdata->reference_counter;
3573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3574 " sending a multicast packet done\n");
3580 * Increase the SKIP value of all peers that
3581 * have not received a unicast message.
3583 * @param cls Closure (ID of the peer that HAS received the message).
3584 * @param key ID of the neighbor.
3585 * @param value FLow control information about the neighbor.
3587 * @return GNUNET_YES to keep iterating.
3590 tunnel_add_skip (void *cls,
3591 const struct GNUNET_HashCode * key,
3594 struct GNUNET_PeerIdentity *neighbor = cls;
3595 struct MeshTunnelFlowControlInfo *fcinfo = value;
3597 /* TODO compare only pointers? key == neighbor? */
3598 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3608 * @brief Get neighbor's Flow Control information.
3610 * Retrieves the MeshTunnelFlowControlInfo containing Flow Control data about
3611 * a direct descendant of the local node in a certain tunnel.
3612 * If the info is not yet there (recently created path), creates the data struct
3613 * and inserts it into the tunnel info, initialized to the current tunnel ACK
3616 * @param t Tunnel related.
3617 * @param peer Neighbor whose Flow Control info is needed.
3619 * @return Neighbor's Flow Control info.
3621 static struct MeshTunnelFlowControlInfo *
3622 tunnel_get_neighbor_fc (struct MeshTunnel *t,
3623 const struct GNUNET_PeerIdentity *peer)
3625 struct MeshTunnelFlowControlInfo *fcinfo;
3627 if (NULL == t->children_fc)
3630 fcinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3636 fcinfo = GNUNET_malloc (sizeof (struct MeshTunnelFlowControlInfo));
3637 fcinfo->peer = peer_info_get(peer);
3638 fcinfo->skip = t->fwd_pid;
3641 delta = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3642 fcinfo->fwd_ack = t->fwd_pid + delta;
3643 fcinfo->bck_ack = delta;
3644 fcinfo->bck_pid = -1;
3646 fcinfo->send_buffer =
3647 GNUNET_malloc (sizeof(struct MeshPeerQueue *) * t->fwd_queue_max);
3649 GNUNET_assert (GNUNET_OK ==
3650 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
3653 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3660 * Get the Flow Control info of a client.
3662 * @param t Tunnel on which to look.
3663 * @param c Client whose ACK to get.
3665 * @return ACK value.
3667 static struct MeshTunnelFlowControlInfo *
3668 tunnel_get_client_fc (struct MeshTunnel *t,
3669 struct MeshClient *c)
3673 for (i = 0; i < t->nclients; i++)
3675 if (t->clients[i] != c)
3677 return &t->clients_fc[i];
3680 return NULL; // won't get here. Just to avoid compiler / coverity complaints.
3685 * Iterator to get the appropiate ACK value from all children nodes.
3687 * @param cls Closue (tunnel).
3688 * @param id Id of the child node.
3691 tunnel_get_child_fwd_ack (void *cls,
3694 struct GNUNET_PeerIdentity peer_id;
3695 struct MeshTunnelFlowControlInfo *fcinfo;
3696 struct MeshTunnelChildIteratorContext *ctx = cls;
3697 struct MeshTunnel *t = ctx->t;
3700 GNUNET_PEER_resolve (id, &peer_id);
3701 fcinfo = tunnel_get_neighbor_fc (t, &peer_id);
3702 ack = fcinfo->fwd_ack;
3705 if (GNUNET_NO == ctx->init)
3707 ctx->max_child_ack = ack;
3708 ctx->init = GNUNET_YES;
3711 if (GNUNET_YES == t->speed_min)
3713 ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
3717 ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
3723 * Get the maximum PID allowed to transmit to any
3724 * tunnel child of the local peer, depending on the tunnel
3725 * buffering/speed settings.
3729 * @return Maximum PID allowed (uint32 MAX), -1LL if node has no children.
3732 tunnel_get_children_fwd_ack (struct MeshTunnel *t)
3734 struct MeshTunnelChildIteratorContext ctx;
3736 ctx.max_child_ack = 0;
3738 ctx.init = GNUNET_NO;
3739 tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
3741 if (0 == ctx.nchildren)
3743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3744 " tunnel has no children, no FWD ACK\n");
3748 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
3749 ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
3751 return (int64_t) ctx.max_child_ack;
3756 * Set the FWD ACK value of a client in a particular tunnel.
3758 * @param t Tunnel affected.
3759 * @param c Client whose ACK to set.
3760 * @param ack ACK value.
3763 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
3764 struct MeshClient *c,
3769 for (i = 0; i < t->nclients; i++)
3771 if (t->clients[i] != c)
3773 t->clients_fc[i].fwd_ack = ack;
3781 * Get the highest ACK value of all clients in a particular tunnel,
3782 * according to the buffering/speed settings.
3784 * @param t Tunnel on which to look.
3786 * @return Corresponding ACK value (max uint32_t).
3787 * If no clients are suscribed, -1LL.
3790 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
3795 if (0 == t->nclients)
3797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3798 " tunnel has no clients, no FWD ACK\n");
3802 for (ack = -1LL, i = 0; i < t->nclients; i++)
3805 (GNUNET_YES == t->speed_min &&
3806 GNUNET_YES == GMC_is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
3807 (GNUNET_NO == t->speed_min &&
3808 GNUNET_YES == GMC_is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
3810 ack = t->clients_fc[i].fwd_ack;
3814 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
3815 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
3817 return (uint32_t) ack;
3822 * Get the current fwd ack value for a tunnel, taking in account the tunnel
3823 * mode and the status of all children nodes.
3827 * @return Maximum PID allowed.
3830 tunnel_get_fwd_ack (struct MeshTunnel *t)
3834 uint32_t buffer_free;
3838 count = t->fwd_pid - t->skip;
3839 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
3840 child_ack = tunnel_get_children_fwd_ack (t);
3841 client_ack = tunnel_get_clients_fwd_ack (t);
3842 if (GNUNET_YES == t->nobuffer)
3845 if (-1LL == child_ack)
3846 child_ack = client_ack;
3847 if (-1LL == child_ack)
3850 client_ack = child_ack = ack;
3855 ack = count + buffer_free; // Overflow? OK!
3857 if (-1LL == child_ack)
3859 // Node has no children, child_ack AND core buffer are irrelevant.
3860 GNUNET_break (-1LL != client_ack); // No children AND no clients? Not good!
3861 return (uint32_t) client_ack;
3863 if (-1LL == client_ack)
3867 if (GNUNET_YES == t->speed_min)
3869 ack = GMC_min_pid ((uint32_t) child_ack, ack);
3870 ack = GMC_min_pid ((uint32_t) client_ack, ack);
3874 ack = GMC_max_pid ((uint32_t) child_ack, ack);
3875 ack = GMC_max_pid ((uint32_t) client_ack, ack);
3877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3878 "c %u, bf %u, ch %lld, cl %lld, ACK: %u\n",
3879 count, buffer_free, child_ack, client_ack, ack);
3885 * Build a local ACK message and send it to a local client.
3887 * @param t Tunnel on which to send the ACK.
3888 * @param c Client to whom send the ACK.
3889 * @param ack Value of the ACK.
3892 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
3894 struct GNUNET_MESH_LocalAck msg;
3896 msg.header.size = htons (sizeof (msg));
3897 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
3898 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
3899 msg.max_pid = htonl (ack);
3900 GNUNET_SERVER_notification_context_unicast(nc,
3907 * Build an ACK message and queue it to send to the given peer.
3909 * @param t Tunnel on which to send the ACK.
3910 * @param peer Peer to whom send the ACK.
3911 * @param ack Value of the ACK.
3914 send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
3916 struct GNUNET_MESH_ACK msg;
3918 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3919 msg.header.size = htons (sizeof (msg));
3920 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3921 msg.pid = htonl (ack);
3922 msg.tid = htonl (t->id.tid);
3924 send_prebuilt_message (&msg.header, peer, t);
3929 * Notify a the owner of a tunnel about how many more
3930 * payload packages will we accept on a given tunnel.
3932 * @param t Tunnel on which to send the ACK.
3935 tunnel_send_client_fwd_ack (struct MeshTunnel *t)
3939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3940 "Sending client FWD ACK on tunnel %X\n",
3943 ack = tunnel_get_fwd_ack (t);
3945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
3946 if (t->last_fwd_ack == ack)
3948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " same as last, not sending!\n");
3952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
3953 t->last_fwd_ack = ack;
3954 send_local_ack (t, t->owner, ack);
3959 * Send an ACK informing the predecessor about the available buffer space.
3960 * In case there is no predecessor, inform the owning client.
3961 * If buffering is off, send only on behalf of children or self if endpoint.
3962 * If buffering is on, send when sent to children and buffer space is free.
3963 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
3964 * the ACK itself goes "back" (towards root).
3966 * @param t Tunnel on which to send the ACK.
3967 * @param type Type of message that triggered the ACK transmission.
3970 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
3972 struct GNUNET_PeerIdentity id;
3975 if (NULL != t->owner)
3977 tunnel_send_client_fwd_ack (t);
3980 /* Is it after unicast / multicast retransmission? */
3983 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3984 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3986 "ACK due to FWD DATA retransmission\n");
3987 if (GNUNET_YES == t->nobuffer)
3989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3993 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3994 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
4000 /* Check if we need no retransmit the ACK */
4001 if (t->fwd_queue_max > t->fwd_queue_n * 4 &&
4002 GMC_is_pid_bigger(t->last_fwd_ack, t->fwd_pid))
4004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
4005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4006 " t->qmax: %u, t->qn: %u\n",
4007 t->fwd_queue_max, t->fwd_queue_n);
4008 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4009 " t->pid: %u, t->ack: %u\n",
4010 t->fwd_pid, t->last_fwd_ack);
4014 /* Ok, ACK might be necessary, what PID to ACK? */
4015 ack = tunnel_get_fwd_ack (t);
4017 /* If speed_min and not all children have ack'd, dont send yet */
4018 if (ack == t->last_fwd_ack)
4020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
4024 t->last_fwd_ack = ack;
4025 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4026 send_ack (t, &id, ack);
4032 * Iterator to send a child node a BCK ACK to allow him to send more
4035 * @param cls Closure (tunnel).
4036 * @param id Id of the child node.
4039 tunnel_send_child_bck_ack (void *cls,
4042 struct MeshTunnel *t = cls;
4043 struct MeshTunnelFlowControlInfo *fcinfo;
4044 struct GNUNET_PeerIdentity peer;
4047 GNUNET_PEER_resolve (id, &peer);
4048 fcinfo = tunnel_get_neighbor_fc (t, &peer);
4049 ack = fcinfo->bck_pid + t->bck_queue_max - t->bck_queue_n;
4052 if (fcinfo->bck_ack == ack)
4054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4055 " Not sending ACK, not needed\n");
4058 fcinfo->bck_ack = ack;
4060 fcinfo->bck_ack = fcinfo->bck_pid + t->bck_queue_max - t->bck_queue_n;
4061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4062 " Sending BCK ACK %u (last sent: %u)\n",
4063 ack, fcinfo->bck_ack);
4064 send_ack (t, &peer, ack);
4069 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
4071 * Iterates over all clients and sends BCK ACKs to the ones that need it.
4073 * FIXME fc: what happens if we have 2 clients but q_size is 1?
4074 * - implement a size 1 buffer in each client_fc AND children_fc
4075 * to hold at least 1 message per "child".
4076 * problem: violates no buffer policy
4077 * - ack 0 and make "children" poll for transmission slots
4078 * problem: big overhead, extra latency even in low traffic
4081 * @param t Tunnel on which to send the BCK ACKs.
4084 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
4087 unsigned int tunnel_delta;
4089 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Sending BCK ACK to clients\n");
4091 tunnel_delta = t->bck_queue_max - t->bck_queue_n;
4092 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " tunnel delta: %u\n", tunnel_delta);
4094 /* Find client whom to allow to send to origin (with lowest buffer space) */
4095 for (i = 0; i < t->nclients; i++)
4097 struct MeshTunnelFlowControlInfo *fcinfo;
4100 fcinfo = &t->clients_fc[i];
4101 delta = fcinfo->bck_ack - fcinfo->bck_pid;
4102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u delta: %u\n",
4103 t->clients[i]->id, delta);
4105 if ((GNUNET_NO == t->nobuffer && tunnel_delta > delta) ||
4106 (GNUNET_YES == t->nobuffer && 0 == delta))
4110 ack = fcinfo->bck_pid;
4111 ack += t->nobuffer ? 1 : tunnel_delta;
4112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4113 " sending ack to client %u: %u\n",
4114 t->clients[i]->id, ack);
4115 send_local_ack (t, t->clients[i], ack);
4116 fcinfo->bck_ack = ack;
4120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4121 " not sending ack to client %u (td %u, d %u)\n",
4122 t->clients[i]->id, tunnel_delta, delta);
4129 * Send an ACK informing the children nodes and destination clients about
4130 * the available buffer space.
4131 * If buffering is off, send only on behalf of root (can be self).
4132 * If buffering is on, send when sent to predecessor and buffer space is free.
4133 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
4134 * the ACK itself goes "forward" (towards children/clients).
4136 * @param t Tunnel on which to send the ACK.
4137 * @param type Type of message that triggered the ACK transmission.
4140 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
4142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4143 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
4144 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
4145 /* Is it after data to_origin retransmission? */
4148 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4149 if (GNUNET_YES == t->nobuffer)
4151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4152 " Not sending ACK, nobuffer\n");
4156 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4157 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
4158 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4164 tunnel_send_clients_bck_ack (t);
4165 tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, t);
4170 * @brief Re-initiate traffic to this peer if necessary.
4172 * Check if there is traffic queued towards this peer
4173 * and the core transmit handle is NULL (traffic was stalled).
4174 * If so, call core tmt rdy.
4176 * @param cls Closure (unused)
4177 * @param peer_id Short ID of peer to which initiate traffic.
4180 peer_unlock_queue(void *cls, GNUNET_PEER_Id peer_id)
4182 struct MeshPeerInfo *peer;
4183 struct GNUNET_PeerIdentity id;
4184 struct MeshPeerQueue *q;
4187 peer = peer_info_get_short(peer_id);
4188 if (NULL != peer->core_transmit)
4191 q = queue_get_next(peer);
4194 /* Might br multicast traffic already sent to this particular peer but
4195 * not to other children in this tunnel.
4196 * This way t->queue_n would be > 0 but the queue of this particular peer
4202 GNUNET_PEER_resolve (peer->id, &id);
4203 peer->core_transmit =
4204 GNUNET_CORE_notify_transmit_ready(core_handle,
4207 GNUNET_TIME_UNIT_FOREVER_REL,
4217 * @brief Allow transmission of FWD traffic on this tunnel
4219 * Check if there is traffic queued towards any children
4220 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4222 * @param t Tunnel on which to unlock FWD traffic.
4225 tunnel_unlock_fwd_queues (struct MeshTunnel *t)
4227 if (0 == t->fwd_queue_n)
4230 tree_iterate_children (t->tree, &peer_unlock_queue, NULL);
4235 * @brief Allow transmission of BCK traffic on this tunnel
4237 * Check if there is traffic queued towards the root of the tree
4238 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4240 * @param t Tunnel on which to unlock BCK traffic.
4243 tunnel_unlock_bck_queue (struct MeshTunnel *t)
4245 if (0 == t->bck_queue_n)
4248 peer_unlock_queue(NULL, tree_get_predecessor(t->tree));
4253 * Send a message to all peers in this tunnel that the tunnel is no longer
4256 * @param t The tunnel whose peers to notify.
4259 tunnel_send_destroy (struct MeshTunnel *t)
4261 struct GNUNET_MESH_TunnelDestroy msg;
4263 msg.header.size = htons (sizeof (msg));
4264 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
4265 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
4266 msg.tid = htonl (t->id.tid);
4267 tunnel_send_multicast (t, &msg.header);
4272 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
4274 * @param cls Closure (Tunnel which to cancel).
4275 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
4278 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
4280 struct MeshTunnel *t = cls;
4281 struct MeshPeerInfo *peer_info;
4282 struct MeshPeerQueue *pq;
4283 struct MeshPeerQueue *next;
4285 peer_info = peer_info_get_short (neighbor_id);
4286 for (pq = peer_info->queue_head; NULL != pq; pq = next)
4289 if (pq->tunnel == t)
4291 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST == pq->type ||
4292 GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
4293 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
4295 // Should have been removed on destroy children
4298 queue_destroy (pq, GNUNET_YES);
4301 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
4303 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
4304 peer_info->core_transmit = NULL;
4309 * Destroy the tunnel and free any allocated resources linked to it.
4311 * @param t the tunnel to destroy
4313 * @return GNUNET_OK on success
4316 tunnel_destroy (struct MeshTunnel *t)
4318 struct MeshClient *c;
4319 struct GNUNET_HashCode hash;
4330 struct GNUNET_PeerIdentity id;
4332 GNUNET_PEER_resolve (t->id.oid, &id);
4333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
4334 GNUNET_i2s (&id), t->id.tid);
4336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4340 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4341 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
4349 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4351 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
4358 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4359 for (i = 0; i < t->nclients; i++)
4363 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
4369 for (i = 0; i < t->nignore; i++)
4373 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
4380 if (t->nclients > 0)
4383 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
4388 GNUNET_free (t->clients);
4389 GNUNET_free (t->clients_fc);
4392 if (NULL != t->peers)
4394 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
4396 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
4399 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4400 &tunnel_destroy_child,
4402 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
4403 t->children_fc = NULL;
4405 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
4406 tree_destroy (t->tree);
4408 if (NULL != t->regex_ctx)
4409 regex_cancel_search (t->regex_ctx);
4410 if (NULL != t->dht_get_type)
4411 GNUNET_DHT_get_stop (t->dht_get_type);
4412 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4413 GNUNET_SCHEDULER_cancel (t->timeout_task);
4414 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
4415 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
4418 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
4425 * Create a new tunnel
4427 * @param owner Who is the owner of the tunnel (short ID).
4428 * @param tid Tunnel Number of the tunnel.
4429 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
4430 * @param local Tunnel Number for the tunnel, for the client point of view.
4432 * @return A new initialized tunnel. NULL on error.
4434 static struct MeshTunnel *
4435 tunnel_new (GNUNET_PEER_Id owner,
4436 MESH_TunnelNumber tid,
4437 struct MeshClient *client,
4438 MESH_TunnelNumber local)
4440 struct MeshTunnel *t;
4441 struct GNUNET_HashCode hash;
4443 if (n_tunnels >= max_tunnels && NULL == client)
4446 t = GNUNET_malloc (sizeof (struct MeshTunnel));
4449 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
4450 t->bck_queue_max = t->fwd_queue_max;
4451 t->tree = tree_new (owner);
4453 t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
4454 t->bck_pid = (uint32_t) -1; // Next (expected) = 0
4455 t->bck_ack = INITIAL_WINDOW_SIZE - 1;
4456 t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
4457 t->local_tid = local;
4458 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
4460 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
4462 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4464 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
4465 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4472 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4479 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4481 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
4482 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4486 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4496 * Removes an explicit path from a tunnel, freeing all intermediate nodes
4497 * that are no longer needed, as well as nodes of no longer reachable peers.
4498 * The tunnel itself is also destoyed if results in a remote empty tunnel.
4500 * @param t Tunnel from which to remove the path.
4501 * @param peer Short id of the peer which should be removed.
4504 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
4506 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
4512 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
4513 * client when the client disconnects. If the client is not the owner, the
4514 * owner will get notified if no more clients are in the tunnel and the client
4515 * get removed from the tunnel's list.
4517 * @param cls closure (client that is disconnecting)
4518 * @param key the hash of the local tunnel id (used to access the hashmap)
4519 * @param value the value stored at the key (tunnel to destroy)
4521 * @return GNUNET_OK, keep iterating.
4524 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
4526 struct MeshTunnel *t = value;
4527 struct MeshClient *c = cls;
4529 send_client_tunnel_disconnect(t, c);
4532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4533 "Client %u is destination, keeping the tunnel alive.\n", c->id);
4534 tunnel_delete_client(t, c);
4535 client_delete_tunnel(c, t);
4538 tunnel_send_destroy(t);
4540 t->destroy = GNUNET_YES;
4547 * Timeout function, destroys tunnel if called
4549 * @param cls Closure (tunnel to destroy).
4550 * @param tc TaskContext
4553 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4555 struct MeshTunnel *t = cls;
4556 struct GNUNET_PeerIdentity id;
4558 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4559 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4561 GNUNET_PEER_resolve(t->id.oid, &id);
4562 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4563 "Tunnel %s [%X] timed out. Destroying.\n",
4564 GNUNET_i2s(&id), t->id.tid);
4565 send_clients_tunnel_destroy (t);
4570 * Resets the tunnel timeout. Starts it if no timeout was running.
4572 * @param t Tunnel whose timeout to reset.
4574 * TODO use heap to improve efficiency of scheduler.
4577 tunnel_reset_timeout (struct MeshTunnel *t)
4579 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4580 GNUNET_SCHEDULER_cancel (t->timeout_task);
4582 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
4583 (refresh_path_time, 4), &tunnel_timeout, t);
4587 /******************************************************************************/
4588 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4589 /******************************************************************************/
4592 * Function to send a create path packet to a peer.
4594 * @param cls closure
4595 * @param size number of bytes available in buf
4596 * @param buf where the callee should write the message
4597 * @return number of bytes written to buf
4600 send_core_path_create (void *cls, size_t size, void *buf)
4602 struct MeshPathInfo *info = cls;
4603 struct GNUNET_MESH_ManipulatePath *msg;
4604 struct GNUNET_PeerIdentity *peer_ptr;
4605 struct MeshTunnel *t = info->t;
4606 struct MeshPeerPath *p = info->path;
4611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
4613 sizeof (struct GNUNET_MESH_ManipulatePath) +
4614 p->length * sizeof (struct GNUNET_PeerIdentity);
4616 if (size < size_needed || NULL == buf)
4621 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
4622 msg->header.size = htons (size_needed);
4623 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
4624 msg->tid = ntohl (t->id.tid);
4627 if (GNUNET_YES == t->speed_min)
4628 opt |= MESH_TUNNEL_OPT_SPEED_MIN;
4629 if (GNUNET_YES == t->nobuffer)
4630 opt |= MESH_TUNNEL_OPT_NOBUFFER;
4631 msg->opt = htonl(opt);
4634 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
4635 for (i = 0; i < p->length; i++)
4637 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
4643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4644 "CREATE PATH (%u bytes long) sent!\n", size_needed);
4650 * Fill the core buffer
4652 * @param cls closure (data itself)
4653 * @param size number of bytes available in buf
4654 * @param buf where the callee should write the message
4656 * @return number of bytes written to buf
4659 send_core_data_multicast (void *cls, size_t size, void *buf)
4661 struct MeshTransmissionDescriptor *info = cls;
4664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
4665 GNUNET_assert (NULL != info);
4666 GNUNET_assert (NULL != info->peer);
4667 total_size = info->mesh_data->data_len;
4668 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
4670 if (total_size > size)
4675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
4676 memcpy (buf, info->mesh_data->data, total_size);
4679 struct GNUNET_MESH_Multicast *mc;
4680 struct GNUNET_MessageHeader *mh;
4683 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
4685 mc = (struct GNUNET_MESH_Multicast *) mh;
4686 mh = (struct GNUNET_MessageHeader *) &mc[1];
4687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4688 " multicast, payload type %s\n",
4689 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4691 " multicast, payload size %u\n", ntohs (mh->size));
4695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %s\n",
4696 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4700 data_descriptor_decrement_rc (info->mesh_data);
4701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
4703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
4709 * Creates a path ack message in buf and frees all unused resources.
4711 * @param cls closure (MeshTransmissionDescriptor)
4712 * @param size number of bytes available in buf
4713 * @param buf where the callee should write the message
4714 * @return number of bytes written to buf
4717 send_core_path_ack (void *cls, size_t size, void *buf)
4719 struct MeshTransmissionDescriptor *info = cls;
4720 struct GNUNET_MESH_PathACK *msg = buf;
4722 GNUNET_assert (NULL != info);
4723 if (sizeof (struct GNUNET_MESH_PathACK) > size)
4728 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
4729 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
4730 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
4731 msg->tid = htonl (info->origin->tid);
4732 msg->peer_id = my_full_id;
4735 /* TODO add signature */
4737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
4738 return sizeof (struct GNUNET_MESH_PathACK);
4743 * Free a transmission that was already queued with all resources
4744 * associated to the request.
4746 * @param queue Queue handler to cancel.
4747 * @param clear_cls Is it necessary to free associated cls?
4750 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4752 struct MeshTransmissionDescriptor *dd;
4753 struct MeshPathInfo *path_info;
4754 struct MeshTunnelFlowControlInfo *fcinfo;
4755 struct GNUNET_PeerIdentity id;
4759 if (GNUNET_YES == clear_cls)
4761 switch (queue->type)
4763 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
4764 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " cancelling TUNNEL_DESTROY\n");
4765 GNUNET_assert (GNUNET_YES == queue->tunnel->destroy);
4766 /* FIXME: don't cancel, send and destroy tunnel in queue_send */
4768 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4769 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4770 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4771 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4772 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
4773 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4774 " prebuilt message\n");
4775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4777 GNUNET_MESH_DEBUG_M2S(queue->type));
4779 data_descriptor_decrement_rc (dd->mesh_data);
4781 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
4783 path_info = queue->cls;
4784 path_destroy (path_info->path);
4788 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4789 " type %s unknown!\n",
4790 GNUNET_MESH_DEBUG_M2S(queue->type));
4792 GNUNET_free_non_null (queue->cls);
4794 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
4795 queue->peer->queue_tail,
4798 /* Delete from child_fc in the appropiate tunnel */
4799 max = queue->tunnel->fwd_queue_max;
4800 GNUNET_PEER_resolve (queue->peer->id, &id);
4801 fcinfo = tunnel_get_neighbor_fc (queue->tunnel, &id);
4804 GNUNET_assert (NULL != fcinfo->peer);
4805 for (i = 0; i < fcinfo->send_buffer_n; i++)
4808 i2 = (fcinfo->send_buffer_start + i) % max;
4809 if (fcinfo->send_buffer[i2] == queue)
4811 /* Found corresponding entry in the send_buffer. Move all others back. */
4816 for (j = i, j2 = 0, j3 = 0; j < fcinfo->send_buffer_n - 1; j++)
4818 j2 = (fcinfo->send_buffer_start + j) % max;
4819 j3 = (fcinfo->send_buffer_start + j + 1) % max;
4820 fcinfo->send_buffer[j2] = fcinfo->send_buffer[j3];
4823 fcinfo->send_buffer[j3] = NULL;
4824 fcinfo->send_buffer_n--;
4829 GNUNET_free (queue);
4834 * @brief Get the next transmittable message from the queue.
4836 * This will be the head, except in the case of being a data packet
4837 * not allowed by the destination peer.
4839 * @param peer Destination peer.
4841 * @return The next viable MeshPeerQueue element to send to that peer.
4842 * NULL when there are no transmittable messages.
4844 struct MeshPeerQueue *
4845 queue_get_next (const struct MeshPeerInfo *peer)
4847 struct MeshPeerQueue *q;
4848 struct MeshTunnel *t;
4849 struct MeshTransmissionDescriptor *info;
4850 struct MeshTunnelFlowControlInfo *fcinfo;
4851 struct GNUNET_MESH_Unicast *ucast;
4852 struct GNUNET_MESH_ToOrigin *to_orig;
4853 struct GNUNET_MESH_Multicast *mcast;
4854 struct GNUNET_PeerIdentity id;
4858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
4859 for (q = peer->queue_head; NULL != q; q = q->next)
4863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4865 GNUNET_MESH_DEBUG_M2S(q->type));
4868 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4869 ucast = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
4870 pid = ntohl (ucast->pid);
4871 GNUNET_PEER_resolve (info->peer->id, &id);
4872 fcinfo = tunnel_get_neighbor_fc (t, &id);
4873 ack = fcinfo->fwd_ack;
4875 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4876 to_orig = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
4877 pid = ntohl (to_orig->pid);
4880 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4881 mcast = (struct GNUNET_MESH_Multicast *) info->mesh_data->data;
4882 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST != ntohs(mcast->header.type))
4884 // Not a multicast payload: multicast control traffic (destroy, etc)
4887 pid = ntohl (mcast->pid);
4888 GNUNET_PEER_resolve (info->peer->id, &id);
4889 fcinfo = tunnel_get_neighbor_fc (t, &id);
4890 ack = fcinfo->fwd_ack;
4893 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4898 "********* ACK: %u, PID: %u\n",
4900 if (GNUNET_NO == GMC_is_pid_bigger(pid, ack))
4902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4909 "********* NEXT!\n");
4912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4913 "********* nothing found\n");
4919 * Core callback to write a queued packet to core buffer
4921 * @param cls Closure (peer info).
4922 * @param size Number of bytes available in buf.
4923 * @param buf Where the to write the message.
4925 * @return number of bytes written to buf
4928 queue_send (void *cls, size_t size, void *buf)
4930 struct MeshPeerInfo *peer = cls;
4931 struct GNUNET_MessageHeader *msg;
4932 struct MeshPeerQueue *queue;
4933 struct MeshTunnel *t;
4934 struct MeshTunnelFlowControlInfo *fcinfo;
4935 struct GNUNET_PeerIdentity dst_id;
4938 peer->core_transmit = NULL;
4941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
4942 queue = queue_get_next (peer);
4944 /* Queue has no internal mesh traffic nor sendable payload */
4947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
4948 if (NULL == peer->queue_head)
4949 GNUNET_break (0); // Should've been canceled
4952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
4954 GNUNET_PEER_resolve (peer->id, &dst_id);
4955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4956 "********* towards %s\n",
4957 GNUNET_i2s(&dst_id));
4958 /* Check if buffer size is enough for the message */
4959 if (queue->size > size)
4961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4962 "********* not enough room, reissue\n");
4963 peer->core_transmit =
4964 GNUNET_CORE_notify_transmit_ready (core_handle,
4967 GNUNET_TIME_UNIT_FOREVER_REL,
4974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
4977 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
4980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4981 "********* unicast: t->q (%u/%u)\n",
4982 t->fwd_queue_n, t->fwd_queue_max);
4984 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
4987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
4991 switch (queue->type)
4994 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4995 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4996 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
4997 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
4998 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
4999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5000 "********* raw: %s\n",
5001 GNUNET_MESH_DEBUG_M2S (queue->type));
5003 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5004 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5005 data_size = send_core_data_raw (queue->cls, size, buf);
5006 msg = (struct GNUNET_MessageHeader *) buf;
5007 switch (ntohs (msg->type)) // Type of preconstructed message
5009 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5010 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5012 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5013 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5019 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
5020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
5022 struct MeshTransmissionDescriptor *info = queue->cls;
5024 if ((1 == info->mesh_data->reference_counter
5025 && GNUNET_YES == t->speed_min)
5027 (info->mesh_data->total_out == info->mesh_data->reference_counter
5028 && GNUNET_NO == t->speed_min))
5030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5031 "********* considered sent\n");
5035 data_size = send_core_data_multicast(queue->cls, size, buf);
5036 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5038 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
5039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
5040 data_size = send_core_path_create (queue->cls, size, buf);
5042 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
5043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
5044 data_size = send_core_path_ack (queue->cls, size, buf);
5046 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
5047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path keepalive\n");
5048 data_size = send_core_data_multicast (queue->cls, size, buf);
5052 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5053 "********* type unknown: %u\n",
5057 switch (queue->type)
5059 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5060 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5061 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
5062 fcinfo = tunnel_get_neighbor_fc (t, &dst_id);
5063 if (fcinfo->send_buffer[fcinfo->send_buffer_start] != queue)
5066 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5067 "at pos %u (%p) != %p\n",
5068 fcinfo->send_buffer_start,
5069 fcinfo->send_buffer[fcinfo->send_buffer_start],
5072 if (fcinfo->send_buffer_n > 0)
5074 fcinfo->send_buffer[fcinfo->send_buffer_start] = NULL;
5075 fcinfo->send_buffer_n--;
5076 fcinfo->send_buffer_start++;
5077 fcinfo->send_buffer_start %= t->fwd_queue_max;
5088 /* Free queue, but cls was freed by send_core_* */
5089 queue_destroy (queue, GNUNET_NO);
5091 if (GNUNET_YES == t->destroy)
5093 // FIXME fc tunnel destroy all pending traffic? wait for it?
5094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
5098 /* If more data in queue, send next */
5099 queue = queue_get_next(peer);
5102 struct GNUNET_PeerIdentity id;
5104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
5105 GNUNET_PEER_resolve (peer->id, &id);
5106 peer->core_transmit =
5107 GNUNET_CORE_notify_transmit_ready(core_handle,
5110 GNUNET_TIME_UNIT_FOREVER_REL,
5118 if (NULL != peer->queue_head)
5120 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5121 "********* %s stalled\n",
5122 GNUNET_i2s(&my_full_id));
5124 fcinfo = tunnel_get_neighbor_fc (t, &dst_id);
5125 fcinfo->fc_poll = GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_UNIT_SECONDS,
5126 &tunnel_poll, fcinfo);
5129 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
5135 * @brief Queue and pass message to core when possible.
5137 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
5138 * and accounts for it. In case the queue is full, the message is dropped and
5141 * Otherwise, message is treated as internal and allowed to go regardless of
5144 * @param cls Closure (@c type dependant). It will be used by queue_send to
5145 * build the message to be sent if not already prebuilt.
5146 * @param type Type of the message, 0 for a raw message.
5147 * @param size Size of the message.
5148 * @param dst Neighbor to send message to.
5149 * @param t Tunnel this message belongs to.
5152 queue_add (void *cls, uint16_t type, size_t size,
5153 struct MeshPeerInfo *dst, struct MeshTunnel *t)
5155 struct MeshPeerQueue *queue;
5156 struct MeshTunnelFlowControlInfo *fcinfo;
5157 struct GNUNET_PeerIdentity id;
5163 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
5164 GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
5166 n = &t->fwd_queue_n;
5167 max = &t->fwd_queue_max;
5169 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
5171 n = &t->bck_queue_n;
5172 max = &t->bck_queue_max;
5178 struct MeshTransmissionDescriptor *td = cls;
5179 struct GNUNET_MESH_ToOrigin *to;
5181 to = td->mesh_data->data;
5183 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5184 "bck pid %u, bck ack %u, msg pid %u\n",
5185 t->bck_pid, t->bck_ack, ntohl(to->pid));
5186 GNUNET_STATISTICS_update(stats, "# messages dropped (buffer full)",
5188 return; // Drop message
5192 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
5198 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
5199 GNUNET_PEER_resolve (dst->id, &id);
5200 if (NULL == dst->core_transmit)
5202 dst->core_transmit =
5203 GNUNET_CORE_notify_transmit_ready (core_handle,
5206 GNUNET_TIME_UNIT_FOREVER_REL,
5212 if (NULL == n) // Is this internal mesh traffic?
5215 // It's payload, keep track of buffer per peer.
5216 fcinfo = tunnel_get_neighbor_fc (t, &id);
5217 i = (fcinfo->send_buffer_start + fcinfo->send_buffer_n) % t->fwd_queue_max;
5218 if (NULL != fcinfo->send_buffer[i])
5220 GNUNET_break (fcinfo->send_buffer_n == t->fwd_queue_max); // aka i == start
5221 queue_destroy (fcinfo->send_buffer[fcinfo->send_buffer_start], GNUNET_YES);
5222 fcinfo->send_buffer_start++;
5223 fcinfo->send_buffer_start %= t->fwd_queue_max;
5227 fcinfo->send_buffer_n++;
5229 fcinfo->send_buffer[i] = queue;
5230 if (fcinfo->send_buffer_n > t->fwd_queue_max)
5233 fcinfo->send_buffer_n = t->fwd_queue_max;
5238 /******************************************************************************/
5239 /******************** MESH NETWORK HANDLERS **************************/
5240 /******************************************************************************/
5244 * Core handler for path creation
5246 * @param cls closure
5247 * @param message message
5248 * @param peer peer identity this notification is about
5249 * @param atsi performance data
5250 * @param atsi_count number of records in 'atsi'
5252 * @return GNUNET_OK to keep the connection open,
5253 * GNUNET_SYSERR to close it (signal serious error)
5256 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
5257 const struct GNUNET_MessageHeader *message,
5258 const struct GNUNET_ATS_Information *atsi,
5259 unsigned int atsi_count)
5261 unsigned int own_pos;
5264 MESH_TunnelNumber tid;
5265 struct GNUNET_MESH_ManipulatePath *msg;
5266 struct GNUNET_PeerIdentity *pi;
5267 struct GNUNET_HashCode hash;
5268 struct MeshPeerPath *path;
5269 struct MeshPeerInfo *dest_peer_info;
5270 struct MeshPeerInfo *orig_peer_info;
5271 struct MeshTunnel *t;
5273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5274 "Received a path create msg [%s]\n",
5275 GNUNET_i2s (&my_full_id));
5276 size = ntohs (message->size);
5277 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5279 GNUNET_break_op (0);
5283 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5284 if (size % sizeof (struct GNUNET_PeerIdentity))
5286 GNUNET_break_op (0);
5289 size /= sizeof (struct GNUNET_PeerIdentity);
5292 GNUNET_break_op (0);
5295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5296 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5298 tid = ntohl (msg->tid);
5299 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5301 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
5302 t = tunnel_get (pi, tid);
5303 if (NULL == t) // FIXME only for INCOMING tunnels?
5307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
5308 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
5311 // FIXME notify failure
5314 opt = ntohl (msg->opt);
5315 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
5316 GNUNET_YES : GNUNET_NO;
5317 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
5319 t->nobuffer = GNUNET_YES;
5320 t->last_fwd_ack = t->fwd_pid + 1;
5322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5323 " speed_min: %d, nobuffer:%d\n",
5324 t->speed_min, t->nobuffer);
5326 if (GNUNET_YES == t->nobuffer)
5328 t->bck_queue_max = 1;
5329 t->fwd_queue_max = 1;
5332 // FIXME only assign a local tid if a local client is interested (on demand)
5333 while (NULL != tunnel_get_incoming (next_local_tid))
5334 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5335 t->local_tid_dest = next_local_tid++;
5336 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5339 tunnel_reset_timeout (t);
5340 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
5342 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
5343 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
5351 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
5352 if (NULL == dest_peer_info)
5354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5355 " Creating PeerInfo for destination.\n");
5356 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5357 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
5358 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
5360 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5362 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
5363 if (NULL == orig_peer_info)
5365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5366 " Creating PeerInfo for origin.\n");
5367 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5368 orig_peer_info->id = GNUNET_PEER_intern (pi);
5369 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
5370 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5373 path = path_new (size);
5375 for (i = 0; i < size; i++)
5377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5378 GNUNET_i2s (&pi[i]));
5379 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5380 if (path->peers[i] == myid)
5383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5386 /* cannot be self, must be 'not found' */
5387 /* create path: self not found in path through self */
5388 GNUNET_break_op (0);
5389 path_destroy (path);
5393 path_add_to_peers (path, GNUNET_NO);
5394 tunnel_add_path (t, path, own_pos);
5395 if (own_pos == size - 1)
5397 /* It is for us! Send ack. */
5398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5399 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
5400 if (NULL == t->peers)
5402 /* New tunnel! Notify clients on first payload message. */
5403 t->peers = GNUNET_CONTAINER_multihashmap_create (4, GNUNET_NO);
5405 GNUNET_break (GNUNET_SYSERR !=
5406 GNUNET_CONTAINER_multihashmap_put (t->peers,
5407 &my_full_id.hashPubKey,
5410 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
5415 struct MeshPeerPath *path2;
5417 /* It's for somebody else! Retransmit. */
5418 path2 = path_duplicate (path);
5419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
5420 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
5421 path2 = path_duplicate (path);
5422 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
5423 send_create_path (dest_peer_info, path, t);
5430 * Core handler for path destruction
5432 * @param cls closure
5433 * @param message message
5434 * @param peer peer identity this notification is about
5435 * @param atsi performance data
5436 * @param atsi_count number of records in 'atsi'
5438 * @return GNUNET_OK to keep the connection open,
5439 * GNUNET_SYSERR to close it (signal serious error)
5442 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5443 const struct GNUNET_MessageHeader *message,
5444 const struct GNUNET_ATS_Information *atsi,
5445 unsigned int atsi_count)
5447 struct GNUNET_MESH_ManipulatePath *msg;
5448 struct GNUNET_PeerIdentity *pi;
5449 struct MeshPeerPath *path;
5450 struct MeshTunnel *t;
5451 unsigned int own_pos;
5455 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5456 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
5457 size = ntohs (message->size);
5458 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5460 GNUNET_break_op (0);
5464 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5465 if (size % sizeof (struct GNUNET_PeerIdentity))
5467 GNUNET_break_op (0);
5470 size /= sizeof (struct GNUNET_PeerIdentity);
5473 GNUNET_break_op (0);
5476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5478 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5479 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5481 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
5483 t = tunnel_get (pi, ntohl (msg->tid));
5486 /* TODO notify back: we don't know this tunnel */
5487 GNUNET_break_op (0);
5490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5491 path = path_new (size);
5493 for (i = 0; i < size; i++)
5495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5496 GNUNET_i2s (&pi[i]));
5497 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5498 if (path->peers[i] == myid)
5501 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5502 if (own_pos < path->length - 1)
5503 send_prebuilt_message (message, &pi[own_pos + 1], t);
5505 send_client_tunnel_disconnect(t, NULL);
5507 tunnel_delete_peer (t, path->peers[path->length - 1]);
5508 path_destroy (path);
5514 * Core handler for notifications of broken paths
5516 * @param cls closure
5517 * @param message message
5518 * @param peer peer identity this notification is about
5519 * @param atsi performance data
5520 * @param atsi_count number of records in 'atsi'
5522 * @return GNUNET_OK to keep the connection open,
5523 * GNUNET_SYSERR to close it (signal serious error)
5526 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
5527 const struct GNUNET_MessageHeader *message,
5528 const struct GNUNET_ATS_Information *atsi,
5529 unsigned int atsi_count)
5531 struct GNUNET_MESH_PathBroken *msg;
5532 struct MeshTunnel *t;
5534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5535 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
5536 msg = (struct GNUNET_MESH_PathBroken *) message;
5537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5538 GNUNET_i2s (&msg->peer1));
5539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5540 GNUNET_i2s (&msg->peer2));
5541 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5544 GNUNET_break_op (0);
5547 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
5548 GNUNET_PEER_search (&msg->peer2));
5555 * Core handler for tunnel destruction
5557 * @param cls closure
5558 * @param message message
5559 * @param peer peer identity this notification is about
5560 * @param atsi performance data
5561 * @param atsi_count number of records in 'atsi'
5563 * @return GNUNET_OK to keep the connection open,
5564 * GNUNET_SYSERR to close it (signal serious error)
5567 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5568 const struct GNUNET_MessageHeader *message,
5569 const struct GNUNET_ATS_Information *atsi,
5570 unsigned int atsi_count)
5572 struct GNUNET_MESH_TunnelDestroy *msg;
5573 struct MeshTunnel *t;
5575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5576 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
5577 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
5578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
5579 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
5580 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5583 /* Probably already got the message from another path,
5584 * destroyed the tunnel and retransmitted to children.
5587 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5590 if (t->id.oid == myid)
5592 GNUNET_break_op (0);
5595 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5597 /* Tunnel was incoming, notify clients */
5598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
5599 t->local_tid, t->local_tid_dest);
5600 send_clients_tunnel_destroy (t);
5602 tunnel_send_destroy (t);
5603 t->destroy = GNUNET_YES;
5604 // TODO: add timeout to destroy the tunnel anyway
5610 * Core handler for mesh network traffic going from the origin to a peer
5612 * @param cls closure
5613 * @param peer peer identity this notification is about
5614 * @param message message
5615 * @param atsi performance data
5616 * @param atsi_count number of records in 'atsi'
5617 * @return GNUNET_OK to keep the connection open,
5618 * GNUNET_SYSERR to close it (signal serious error)
5621 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5622 const struct GNUNET_MessageHeader *message,
5623 const struct GNUNET_ATS_Information *atsi,
5624 unsigned int atsi_count)
5626 struct GNUNET_MESH_Unicast *msg;
5627 struct GNUNET_PeerIdentity *neighbor;
5628 struct MeshTunnelFlowControlInfo *fcinfo;
5629 struct MeshTunnel *t;
5630 GNUNET_PEER_Id dest_id;
5635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
5638 size = ntohs (message->size);
5640 sizeof (struct GNUNET_MESH_Unicast) +
5641 sizeof (struct GNUNET_MessageHeader))
5646 msg = (struct GNUNET_MESH_Unicast *) message;
5647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5648 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5650 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5653 /* TODO notify back: we don't know this tunnel */
5654 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5655 GNUNET_break_op (0);
5658 pid = ntohl (msg->pid);
5659 if (t->fwd_pid == pid)
5661 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5662 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5663 " Already seen pid %u, DROPPING!\n", pid);
5668 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5669 " pid %u not seen yet, forwarding\n", pid);
5672 t->skip += (pid - t->fwd_pid) - 1;
5675 if (GMC_is_pid_bigger (pid, t->last_fwd_ack))
5677 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5678 GNUNET_break_op (0);
5679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5680 "Received PID %u, ACK %u\n",
5681 pid, t->last_fwd_ack);
5685 tunnel_reset_timeout (t);
5686 dest_id = GNUNET_PEER_search (&msg->destination);
5687 if (dest_id == myid)
5689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5690 " it's for us! sending to clients...\n");
5691 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
5692 send_subscribed_clients (message, &msg[1].header, t);
5693 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5696 ttl = ntohl (msg->ttl);
5697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5700 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5701 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5702 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5706 " not for us, retransmitting...\n");
5708 neighbor = tree_get_first_hop (t->tree, dest_id);
5709 fcinfo = tunnel_get_neighbor_fc (t, neighbor);
5710 fcinfo->fwd_pid = pid;
5711 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
5714 if (GNUNET_YES == t->nobuffer &&
5715 GNUNET_YES == GMC_is_pid_bigger (pid, fcinfo->fwd_ack))
5717 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5718 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " %u > %u\n", pid, fcinfo->fwd_ack);
5719 GNUNET_break_op (0);
5722 send_prebuilt_message (message, neighbor, t);
5723 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
5729 * Core handler for mesh network traffic going from the origin to all peers
5731 * @param cls closure
5732 * @param message message
5733 * @param peer peer identity this notification is about
5734 * @param atsi performance data
5735 * @param atsi_count number of records in 'atsi'
5736 * @return GNUNET_OK to keep the connection open,
5737 * GNUNET_SYSERR to close it (signal serious error)
5739 * TODO: Check who we got this from, to validate route.
5742 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5743 const struct GNUNET_MessageHeader *message,
5744 const struct GNUNET_ATS_Information *atsi,
5745 unsigned int atsi_count)
5747 struct GNUNET_MESH_Multicast *msg;
5748 struct MeshTunnel *t;
5752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
5754 size = ntohs (message->size);
5755 if (sizeof (struct GNUNET_MESH_Multicast) +
5756 sizeof (struct GNUNET_MessageHeader) > size)
5758 GNUNET_break_op (0);
5761 msg = (struct GNUNET_MESH_Multicast *) message;
5762 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5766 /* TODO notify that we dont know that tunnel */
5767 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5768 GNUNET_break_op (0);
5771 pid = ntohl (msg->pid);
5772 if (t->fwd_pid == pid)
5774 /* already seen this packet, drop */
5775 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5777 " Already seen pid %u, DROPPING!\n", pid);
5778 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5784 " pid %u not seen yet, forwarding\n", pid);
5786 t->skip += (pid - t->fwd_pid) - 1;
5788 tunnel_reset_timeout (t);
5790 /* Transmit to locally interested clients */
5791 if (NULL != t->peers &&
5792 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
5794 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
5795 send_subscribed_clients (message, &msg[1].header, t);
5796 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
5799 if (ntohl (msg->ttl) == 0)
5801 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5802 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5803 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5806 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
5807 tunnel_send_multicast (t, message);
5813 * Core handler for mesh network traffic toward the owner of a tunnel
5815 * @param cls closure
5816 * @param message message
5817 * @param peer peer identity this notification is about
5818 * @param atsi performance data
5819 * @param atsi_count number of records in 'atsi'
5821 * @return GNUNET_OK to keep the connection open,
5822 * GNUNET_SYSERR to close it (signal serious error)
5825 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
5826 const struct GNUNET_MessageHeader *message,
5827 const struct GNUNET_ATS_Information *atsi,
5828 unsigned int atsi_count)
5830 struct GNUNET_MESH_ToOrigin *msg;
5831 struct GNUNET_PeerIdentity id;
5832 struct MeshPeerInfo *peer_info;
5833 struct MeshTunnel *t;
5834 struct MeshTunnelFlowControlInfo *fcinfo;
5838 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
5840 size = ntohs (message->size);
5841 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
5842 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
5844 GNUNET_break_op (0);
5847 msg = (struct GNUNET_MESH_ToOrigin *) message;
5848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5849 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5850 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5851 pid = ntohl (msg->pid);
5855 /* TODO notify that we dont know this tunnel (whom)? */
5856 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5857 GNUNET_break_op (0);
5858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5859 "Received to_origin with PID %u on unknown tunnel\n",
5864 fcinfo = tunnel_get_neighbor_fc (t, peer);
5871 if (fcinfo->bck_pid == pid)
5873 /* already seen this packet, drop */
5874 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
5875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5876 " Already seen pid %u, DROPPING!\n", pid);
5877 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5882 " pid %u not seen yet, forwarding\n", pid);
5883 fcinfo->bck_pid = pid;
5885 if (NULL != t->owner)
5888 struct GNUNET_MESH_ToOrigin *copy;
5890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5891 " it's for us! sending to clients...\n");
5892 /* TODO signature verification */
5893 memcpy (cbuf, message, size);
5894 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
5895 copy->tid = htonl (t->local_tid);
5897 copy->pid = htonl (t->bck_pid);
5898 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
5899 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
5900 ©->header, GNUNET_NO);
5901 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5905 " not for us, retransmitting...\n");
5907 peer_info = peer_info_get (&msg->oid);
5908 if (NULL == peer_info)
5910 /* unknown origin of tunnel */
5914 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5915 send_prebuilt_message (message, &id, t);
5916 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
5923 * Core handler for mesh network traffic point-to-point acks.
5925 * @param cls closure
5926 * @param message message
5927 * @param peer peer identity this notification is about
5928 * @param atsi performance data
5929 * @param atsi_count number of records in 'atsi'
5931 * @return GNUNET_OK to keep the connection open,
5932 * GNUNET_SYSERR to close it (signal serious error)
5935 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5936 const struct GNUNET_MessageHeader *message,
5937 const struct GNUNET_ATS_Information *atsi,
5938 unsigned int atsi_count)
5940 struct GNUNET_MESH_ACK *msg;
5941 struct MeshTunnel *t;
5944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
5946 msg = (struct GNUNET_MESH_ACK *) message;
5948 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5952 /* TODO notify that we dont know this tunnel (whom)? */
5953 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
5954 GNUNET_break_op (0);
5957 ack = ntohl (msg->pid);
5958 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
5960 /* Is this a forward or backward ACK? */
5961 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
5963 struct MeshTunnelFlowControlInfo *fcinfo;
5966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
5967 fcinfo = tunnel_get_neighbor_fc (t, peer);
5968 fcinfo->fwd_ack = ack;
5969 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5970 tunnel_unlock_fwd_queues (t);
5974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
5976 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5977 tunnel_unlock_bck_queue (t);
5984 * Core handler for mesh network traffic point-to-point ack polls.
5986 * @param cls closure
5987 * @param message message
5988 * @param peer peer identity this notification is about
5989 * @param atsi performance data
5990 * @param atsi_count number of records in 'atsi'
5992 * @return GNUNET_OK to keep the connection open,
5993 * GNUNET_SYSERR to close it (signal serious error)
5996 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
5997 const struct GNUNET_MessageHeader *message,
5998 const struct GNUNET_ATS_Information *atsi,
5999 unsigned int atsi_count)
6001 struct GNUNET_MESH_Poll *msg;
6002 struct MeshTunnel *t;
6004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
6007 msg = (struct GNUNET_MESH_Poll *) message;
6009 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6013 /* TODO notify that we dont know this tunnel (whom)? */
6014 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
6015 GNUNET_break_op (0);
6019 /* Is this a forward or backward ACK? */
6020 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
6022 struct MeshTunnelFlowControlInfo *fcinfo;
6024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
6025 fcinfo = tunnel_get_neighbor_fc (t, peer);
6026 fcinfo->bck_ack = fcinfo->fwd_pid; // mark as ready to send
6027 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
6031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
6032 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
6040 * Core handler for path ACKs
6042 * @param cls closure
6043 * @param message message
6044 * @param peer peer identity this notification is about
6045 * @param atsi performance data
6046 * @param atsi_count number of records in 'atsi'
6048 * @return GNUNET_OK to keep the connection open,
6049 * GNUNET_SYSERR to close it (signal serious error)
6052 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
6053 const struct GNUNET_MessageHeader *message,
6054 const struct GNUNET_ATS_Information *atsi,
6055 unsigned int atsi_count)
6057 struct GNUNET_MESH_PathACK *msg;
6058 struct GNUNET_PeerIdentity id;
6059 struct MeshPeerInfo *peer_info;
6060 struct MeshPeerPath *p;
6061 struct MeshTunnel *t;
6063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
6064 GNUNET_i2s (&my_full_id));
6065 msg = (struct GNUNET_MESH_PathACK *) message;
6066 t = tunnel_get (&msg->oid, ntohl(msg->tid));
6069 /* TODO notify that we don't know the tunnel */
6070 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
6071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
6072 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
6075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
6076 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
6078 peer_info = peer_info_get (&msg->peer_id);
6079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
6080 GNUNET_i2s (&msg->peer_id));
6081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
6084 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
6086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6087 "connect_by_string completed, stopping search\n");
6088 regex_cancel_search (t->regex_ctx);
6089 t->regex_ctx = NULL;
6092 /* Add paths to peers? */
6093 p = tree_get_path_to_peer (t->tree, peer_info->id);
6096 path_add_to_peers (p, GNUNET_YES);
6104 /* Message for us? */
6105 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
6107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
6108 if (NULL == t->owner)
6110 GNUNET_break_op (0);
6113 if (NULL != t->dht_get_type)
6115 GNUNET_DHT_get_stop (t->dht_get_type);
6116 t->dht_get_type = NULL;
6118 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
6120 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
6121 send_client_peer_connected (t, peer_info->id);
6126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6127 " not for us, retransmitting...\n");
6128 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
6129 peer_info = peer_info_get (&msg->oid);
6130 if (NULL == peer_info)
6132 /* If we know the tunnel, we should DEFINITELY know the peer */
6136 send_prebuilt_message (message, &id, t);
6142 * Core handler for mesh keepalives.
6144 * @param cls closure
6145 * @param message message
6146 * @param peer peer identity this notification is about
6147 * @param atsi performance data
6148 * @param atsi_count number of records in 'atsi'
6149 * @return GNUNET_OK to keep the connection open,
6150 * GNUNET_SYSERR to close it (signal serious error)
6152 * TODO: Check who we got this from, to validate route.
6155 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
6156 const struct GNUNET_MessageHeader *message,
6157 const struct GNUNET_ATS_Information *atsi,
6158 unsigned int atsi_count)
6160 struct GNUNET_MESH_TunnelKeepAlive *msg;
6161 struct MeshTunnel *t;
6163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
6166 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
6167 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6171 /* TODO notify that we dont know that tunnel */
6172 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1, GNUNET_NO);
6173 GNUNET_break_op (0);
6177 tunnel_reset_timeout (t);
6179 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
6180 tunnel_send_multicast (t, message);
6187 * Functions to handle messages from core
6189 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
6190 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
6191 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
6192 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
6193 sizeof (struct GNUNET_MESH_PathBroken)},
6194 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
6195 sizeof (struct GNUNET_MESH_TunnelDestroy)},
6196 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
6197 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
6198 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
6199 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
6200 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
6201 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
6202 sizeof (struct GNUNET_MESH_ACK)},
6203 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
6204 sizeof (struct GNUNET_MESH_Poll)},
6205 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
6206 sizeof (struct GNUNET_MESH_PathACK)},
6212 /******************************************************************************/
6213 /**************** MESH LOCAL HANDLER HELPERS ***********************/
6214 /******************************************************************************/
6217 * deregister_app: iterator for removing each application registered by a client
6219 * @param cls closure
6220 * @param key the hash of the application id (used to access the hashmap)
6221 * @param value the value stored at the key (client)
6223 * @return GNUNET_OK on success
6226 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
6228 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
6229 GNUNET_break (GNUNET_YES ==
6230 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
6236 * notify_client_connection_failure: notify a client that the connection to the
6237 * requested remote peer is not possible (for instance, no route found)
6238 * Function called when the socket is ready to queue more data. "buf" will be
6239 * NULL and "size" zero if the socket was closed for writing in the meantime.
6241 * @param cls closure
6242 * @param size number of bytes available in buf
6243 * @param buf where the callee should write the message
6244 * @return number of bytes written to buf
6247 notify_client_connection_failure (void *cls, size_t size, void *buf)
6250 struct MeshPeerInfo *peer_info;
6251 struct GNUNET_MESH_PeerControl *msg;
6252 struct GNUNET_PeerIdentity id;
6254 if (0 == size && NULL == buf)
6256 // TODO retry? cancel?
6260 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
6261 peer_info = (struct MeshPeerInfo *) cls;
6262 msg = (struct GNUNET_MESH_PeerControl *) buf;
6263 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
6264 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
6265 // msg->tunnel_id = htonl(peer_info->t->tid);
6266 GNUNET_PEER_resolve (peer_info->id, &id);
6267 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
6275 * Send keepalive packets for a peer
6277 * @param cls Closure (tunnel for which to send the keepalive).
6278 * @param tc Notification context.
6281 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6283 struct MeshTunnel *t = cls;
6284 struct GNUNET_MESH_TunnelKeepAlive *msg;
6285 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
6288 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
6289 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
6294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6295 "sending keepalive for tunnel %d\n", t->id.tid);
6297 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
6298 msg->header.size = htons (size);
6299 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
6300 msg->oid = my_full_id;
6301 msg->tid = htonl (t->id.tid);
6302 tunnel_send_multicast (t, &msg->header);
6304 t->path_refresh_task =
6305 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
6306 tunnel_reset_timeout(t);
6311 * Function to process paths received for a new peer addition. The recorded
6312 * paths form the initial tunnel, which can be optimized later.
6313 * Called on each result obtained for the DHT search.
6315 * @param cls closure
6316 * @param exp when will this value expire
6317 * @param key key of the result
6318 * @param get_path path of the get request
6319 * @param get_path_length lenght of get_path
6320 * @param put_path path of the put request
6321 * @param put_path_length length of the put_path
6322 * @param type type of the result
6323 * @param size number of bytes in data
6324 * @param data pointer to the result data
6326 * TODO: re-issue the request after certain time? cancel after X results?
6329 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6330 const struct GNUNET_HashCode * key,
6331 const struct GNUNET_PeerIdentity *get_path,
6332 unsigned int get_path_length,
6333 const struct GNUNET_PeerIdentity *put_path,
6334 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6335 size_t size, const void *data)
6337 struct MeshPathInfo *path_info = cls;
6338 struct MeshPeerPath *p;
6339 struct GNUNET_PeerIdentity pi;
6342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
6343 GNUNET_PEER_resolve (path_info->peer->id, &pi);
6344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
6346 p = path_build_from_dht (get_path, get_path_length, put_path,
6348 path_add_to_peers (p, GNUNET_NO);
6350 for (i = 0; i < path_info->peer->ntunnels; i++)
6352 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
6353 peer_info_connect (path_info->peer, path_info->t);
6361 * Function to process paths received for a new peer addition. The recorded
6362 * paths form the initial tunnel, which can be optimized later.
6363 * Called on each result obtained for the DHT search.
6365 * @param cls closure
6366 * @param exp when will this value expire
6367 * @param key key of the result
6368 * @param get_path path of the get request
6369 * @param get_path_length lenght of get_path
6370 * @param put_path path of the put request
6371 * @param put_path_length length of the put_path
6372 * @param type type of the result
6373 * @param size number of bytes in data
6374 * @param data pointer to the result data
6377 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6378 const struct GNUNET_HashCode * key,
6379 const struct GNUNET_PeerIdentity *get_path,
6380 unsigned int get_path_length,
6381 const struct GNUNET_PeerIdentity *put_path,
6382 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6383 size_t size, const void *data)
6385 const struct PBlock *pb = data;
6386 const struct GNUNET_PeerIdentity *pi = &pb->id;
6387 struct MeshTunnel *t = cls;
6388 struct MeshPeerInfo *peer_info;
6389 struct MeshPeerPath *p;
6391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
6392 if (size != sizeof (struct PBlock))
6394 GNUNET_break_op (0);
6397 if (ntohl(pb->type) != t->type)
6399 GNUNET_break_op (0);
6402 GNUNET_assert (NULL != t->owner);
6403 peer_info = peer_info_get (pi);
6404 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
6406 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
6408 p = path_build_from_dht (get_path, get_path_length, put_path,
6410 path_add_to_peers (p, GNUNET_NO);
6412 tunnel_add_peer (t, peer_info);
6413 peer_info_connect (peer_info, t);
6418 * Function to process DHT string to regex matching.
6419 * Called on each result obtained for the DHT search.
6421 * @param cls closure (search context)
6422 * @param exp when will this value expire
6423 * @param key key of the result
6424 * @param get_path path of the get request (not used)
6425 * @param get_path_length lenght of get_path (not used)
6426 * @param put_path path of the put request (not used)
6427 * @param put_path_length length of the put_path (not used)
6428 * @param type type of the result
6429 * @param size number of bytes in data
6430 * @param data pointer to the result data
6433 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6434 const struct GNUNET_HashCode * key,
6435 const struct GNUNET_PeerIdentity *get_path,
6436 unsigned int get_path_length,
6437 const struct GNUNET_PeerIdentity *put_path,
6438 unsigned int put_path_length,
6439 enum GNUNET_BLOCK_Type type,
6440 size_t size, const void *data)
6442 const struct MeshRegexAccept *block = data;
6443 struct MeshRegexSearchContext *ctx = cls;
6444 struct MeshRegexSearchInfo *info = ctx->info;
6445 struct MeshPeerPath *p;
6446 struct MeshPeerInfo *peer_info;
6448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
6449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
6451 peer_info = peer_info_get(&block->id);
6452 p = path_build_from_dht (get_path, get_path_length, put_path,
6454 path_add_to_peers (p, GNUNET_NO);
6457 tunnel_add_peer (info->t, peer_info);
6458 peer_info_connect (peer_info, info->t);
6459 if (0 == info->peer)
6461 info->peer = peer_info->id;
6465 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
6468 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
6469 ®ex_connect_timeout,
6477 * Function to process DHT string to regex matching.
6478 * Called on each result obtained for the DHT search.
6480 * @param cls closure (search context)
6481 * @param exp when will this value expire
6482 * @param key key of the result
6483 * @param get_path path of the get request (not used)
6484 * @param get_path_length lenght of get_path (not used)
6485 * @param put_path path of the put request (not used)
6486 * @param put_path_length length of the put_path (not used)
6487 * @param type type of the result
6488 * @param size number of bytes in data
6489 * @param data pointer to the result data
6491 * TODO: re-issue the request after certain time? cancel after X results?
6494 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6495 const struct GNUNET_HashCode * key,
6496 const struct GNUNET_PeerIdentity *get_path,
6497 unsigned int get_path_length,
6498 const struct GNUNET_PeerIdentity *put_path,
6499 unsigned int put_path_length,
6500 enum GNUNET_BLOCK_Type type,
6501 size_t size, const void *data)
6503 const struct MeshRegexBlock *block = data;
6504 struct MeshRegexSearchContext *ctx = cls;
6505 struct MeshRegexSearchInfo *info = ctx->info;
6509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6510 "DHT GET STRING RETURNED RESULTS\n");
6511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6512 " key: %s\n", GNUNET_h2s (key));
6514 copy = GNUNET_malloc (size);
6515 memcpy (copy, data, size);
6516 GNUNET_break (GNUNET_OK ==
6517 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
6518 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
6519 len = ntohl (block->n_proof);
6521 char proof[len + 1];
6523 memcpy (proof, &block[1], len);
6525 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
6527 GNUNET_break_op (0);
6531 len = strlen (info->description);
6532 if (len == ctx->position) // String processed
6534 if (GNUNET_YES == ntohl (block->accepting))
6536 regex_find_path(key, ctx);
6540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
6541 // FIXME REGEX this block not successful, wait for more? start timeout?
6546 regex_next_edge (block, size, ctx);
6551 /******************************************************************************/
6552 /********************* MESH LOCAL HANDLES **************************/
6553 /******************************************************************************/
6557 * Handler for client disconnection
6559 * @param cls closure
6560 * @param client identification of the client; NULL
6561 * for the last call when the server is destroyed
6564 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
6566 struct MeshClient *c;
6567 struct MeshClient *next;
6570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
6573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
6579 if (c->handle != client)
6581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
6585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
6587 GNUNET_SERVER_client_drop (c->handle);
6588 c->shutting_down = GNUNET_YES;
6589 GNUNET_assert (NULL != c->own_tunnels);
6590 GNUNET_assert (NULL != c->incoming_tunnels);
6591 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
6592 &tunnel_destroy_iterator, c);
6593 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
6594 &tunnel_destroy_iterator, c);
6595 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
6596 &tunnel_destroy_iterator, c);
6597 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
6598 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
6599 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
6601 /* deregister clients applications */
6602 if (NULL != c->apps)
6604 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
6605 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
6607 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
6608 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
6610 GNUNET_SCHEDULER_cancel (announce_applications_task);
6611 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
6613 if (NULL != c->types)
6614 GNUNET_CONTAINER_multihashmap_destroy (c->types);
6615 for (i = 0; i < c->n_regex; i++)
6617 GNUNET_free (c->regexes[i].regex);
6619 GNUNET_free_non_null (c->regexes);
6620 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
6621 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
6623 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
6624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
6626 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
6629 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
6635 * Handler for new clients
6637 * @param cls closure
6638 * @param client identification of the client
6639 * @param message the actual message, which includes messages the client wants
6642 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
6643 const struct GNUNET_MessageHeader *message)
6645 struct GNUNET_MESH_ClientConnect *cc_msg;
6646 struct MeshClient *c;
6647 GNUNET_MESH_ApplicationType *a;
6654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
6655 /* Check data sanity */
6656 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
6657 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
6658 ntypes = ntohs (cc_msg->types);
6659 napps = ntohs (cc_msg->applications);
6661 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
6664 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6668 /* Create new client structure */
6669 c = GNUNET_malloc (sizeof (struct MeshClient));
6670 c->id = next_client_id++;
6671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
6673 GNUNET_SERVER_client_keep (client);
6674 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
6677 GNUNET_MESH_ApplicationType at;
6678 struct GNUNET_HashCode hc;
6680 c->apps = GNUNET_CONTAINER_multihashmap_create (napps, GNUNET_NO);
6681 for (i = 0; i < napps; i++)
6684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
6685 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
6686 /* store in clients hashmap */
6687 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
6688 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6689 /* store in global hashmap, for announcements */
6690 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
6691 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6693 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
6694 announce_applications_task =
6695 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
6701 struct GNUNET_HashCode hc;
6703 t = (uint16_t *) & a[napps];
6704 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes, GNUNET_NO);
6705 for (i = 0; i < ntypes; i++)
6708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
6709 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
6711 /* store in clients hashmap */
6712 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
6713 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6714 /* store in global hashmap */
6715 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
6716 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6720 " client has %u+%u subscriptions\n", napps, ntypes);
6722 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
6723 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6724 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6725 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6726 GNUNET_SERVER_notification_context_add (nc, client);
6727 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
6729 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
6735 * Handler for clients announcing available services by a regular expression.
6737 * @param cls closure
6738 * @param client identification of the client
6739 * @param message the actual message, which includes messages the client wants
6742 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
6743 const struct GNUNET_MessageHeader *message)
6745 struct GNUNET_MESH_RegexAnnounce *msg;
6746 struct MeshRegexDescriptor rd;
6747 struct MeshClient *c;
6751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
6753 /* Sanity check for client registration */
6754 if (NULL == (c = client_get (client)))
6757 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6762 msg = (struct GNUNET_MESH_RegexAnnounce *) message;
6763 len = ntohs (message->size) - sizeof(struct GNUNET_MESH_RegexAnnounce);
6764 regex = GNUNET_malloc (len + 1);
6765 memcpy (regex, &msg[1], len);
6768 rd.compression = ntohs (msg->compression_characters);
6769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " length %u\n", len);
6770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regex %s\n", regex);
6771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " cm %u\n", ntohs(rd.compression));
6772 GNUNET_array_append (c->regexes, c->n_regex, rd);
6773 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
6775 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
6781 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
6787 * Handler for requests of new tunnels
6789 * @param cls closure
6790 * @param client identification of the client
6791 * @param message the actual message
6794 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
6795 const struct GNUNET_MessageHeader *message)
6797 struct GNUNET_MESH_TunnelMessage *t_msg;
6798 struct MeshTunnel *t;
6799 struct MeshClient *c;
6800 MESH_TunnelNumber tid;
6802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
6804 /* Sanity check for client registration */
6805 if (NULL == (c = client_get (client)))
6808 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6811 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6813 /* Message sanity check */
6814 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6817 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6821 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6822 /* Sanity check for tunnel numbering */
6823 tid = ntohl (t_msg->tunnel_id);
6824 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
6827 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6830 /* Sanity check for duplicate tunnel IDs */
6831 if (NULL != tunnel_get_by_local_id (c, tid))
6834 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6838 while (NULL != tunnel_get_by_pi (myid, next_tid))
6839 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6840 t = tunnel_new (myid, next_tid++, c, tid);
6843 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
6845 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6848 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
6850 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
6851 t->peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
6854 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6860 * Handler for requests of deleting tunnels
6862 * @param cls closure
6863 * @param client identification of the client
6864 * @param message the actual message
6867 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
6868 const struct GNUNET_MessageHeader *message)
6870 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6871 struct MeshClient *c;
6872 struct MeshTunnel *t;
6873 MESH_TunnelNumber tid;
6875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6876 "Got a DESTROY TUNNEL from client!\n");
6878 /* Sanity check for client registration */
6879 if (NULL == (c = client_get (client)))
6882 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6887 /* Message sanity check */
6888 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6891 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6895 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6897 /* Retrieve tunnel */
6898 tid = ntohl (tunnel_msg->tunnel_id);
6899 t = tunnel_get_by_local_id(c, tid);
6902 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6904 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6907 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6909 client_ignore_tunnel (c, t);
6911 // TODO: when to destroy incoming tunnel?
6912 if (t->nclients == 0)
6914 GNUNET_assert (GNUNET_YES ==
6915 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
6917 GNUNET_assert (GNUNET_YES ==
6918 GNUNET_CONTAINER_multihashmap_remove (t->peers,
6919 &my_full_id.hashPubKey,
6923 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6926 send_client_tunnel_disconnect(t, c);
6927 client_delete_tunnel(c, t);
6929 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
6931 tunnel_send_destroy (t);
6932 t->destroy = GNUNET_YES;
6933 // The tunnel will be destroyed when the last message is transmitted.
6934 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6940 * Handler for requests of seeting tunnel's speed.
6942 * @param cls Closure (unused).
6943 * @param client Identification of the client.
6944 * @param message The actual message.
6947 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
6948 const struct GNUNET_MessageHeader *message)
6950 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6951 struct MeshClient *c;
6952 struct MeshTunnel *t;
6953 MESH_TunnelNumber tid;
6955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6956 "Got a SPEED request from client!\n");
6958 /* Sanity check for client registration */
6959 if (NULL == (c = client_get (client)))
6962 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6968 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6970 /* Retrieve tunnel */
6971 tid = ntohl (tunnel_msg->tunnel_id);
6972 t = tunnel_get_by_local_id(c, tid);
6975 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
6977 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6981 switch (ntohs(message->type))
6983 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
6984 t->speed_min = GNUNET_YES;
6986 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
6987 t->speed_min = GNUNET_NO;
6992 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6997 * Handler for requests of seeting tunnel's buffering policy.
6999 * @param cls Closure (unused).
7000 * @param client Identification of the client.
7001 * @param message The actual message.
7004 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
7005 const struct GNUNET_MessageHeader *message)
7007 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
7008 struct MeshClient *c;
7009 struct MeshTunnel *t;
7010 MESH_TunnelNumber tid;
7012 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7013 "Got a BUFFER request from client!\n");
7015 /* Sanity check for client registration */
7016 if (NULL == (c = client_get (client)))
7019 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7024 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
7026 /* Retrieve tunnel */
7027 tid = ntohl (tunnel_msg->tunnel_id);
7028 t = tunnel_get_by_local_id(c, tid);
7031 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
7033 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7037 switch (ntohs(message->type))
7039 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
7040 t->nobuffer = GNUNET_NO;
7042 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
7043 t->nobuffer = GNUNET_YES;
7049 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7054 * Handler for connection requests to new peers
7056 * @param cls closure
7057 * @param client identification of the client
7058 * @param message the actual message (PeerControl)
7061 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
7062 const struct GNUNET_MessageHeader *message)
7064 struct GNUNET_MESH_PeerControl *peer_msg;
7065 struct MeshPeerInfo *peer_info;
7066 struct MeshClient *c;
7067 struct MeshTunnel *t;
7068 MESH_TunnelNumber tid;
7070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
7071 /* Sanity check for client registration */
7072 if (NULL == (c = client_get (client)))
7075 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7078 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7080 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7082 /* Sanity check for message size */
7083 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7086 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7090 /* Tunnel exists? */
7091 tid = ntohl (peer_msg->tunnel_id);
7092 t = tunnel_get_by_local_id (c, tid);
7096 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7100 /* Does client own tunnel? */
7101 if (t->owner->handle != client)
7104 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
7108 GNUNET_i2s (&peer_msg->peer));
7109 peer_info = peer_info_get (&peer_msg->peer);
7111 tunnel_add_peer (t, peer_info);
7112 peer_info_connect (peer_info, t);
7114 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7120 * Handler for disconnection requests of peers in a tunnel
7122 * @param cls closure
7123 * @param client identification of the client
7124 * @param message the actual message (PeerControl)
7127 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
7128 const struct GNUNET_MessageHeader *message)
7130 struct GNUNET_MESH_PeerControl *peer_msg;
7131 struct MeshPeerInfo *peer_info;
7132 struct MeshClient *c;
7133 struct MeshTunnel *t;
7134 MESH_TunnelNumber tid;
7136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
7137 /* Sanity check for client registration */
7138 if (NULL == (c = client_get (client)))
7141 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7146 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7148 /* Sanity check for message size */
7149 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7152 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7156 /* Tunnel exists? */
7157 tid = ntohl (peer_msg->tunnel_id);
7158 t = tunnel_get_by_local_id (c, tid);
7162 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7165 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7167 /* Does client own tunnel? */
7168 if (t->owner->handle != client)
7171 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
7176 GNUNET_i2s (&peer_msg->peer));
7177 /* Is the peer in the tunnel? */
7179 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
7180 if (NULL == peer_info)
7183 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7187 /* Ok, delete peer from tunnel */
7188 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
7189 &peer_msg->peer.hashPubKey);
7191 send_destroy_path (t, peer_info->id);
7192 tunnel_delete_peer (t, peer_info->id);
7193 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7198 * Handler for blacklist requests of peers in a tunnel
7200 * @param cls closure
7201 * @param client identification of the client
7202 * @param message the actual message (PeerControl)
7204 * FIXME implement DHT block bloomfilter
7207 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
7208 const struct GNUNET_MessageHeader *message)
7210 struct GNUNET_MESH_PeerControl *peer_msg;
7211 struct MeshClient *c;
7212 struct MeshTunnel *t;
7213 MESH_TunnelNumber tid;
7215 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
7216 /* Sanity check for client registration */
7217 if (NULL == (c = client_get (client)))
7220 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7225 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7227 /* Sanity check for message size */
7228 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7231 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7235 /* Tunnel exists? */
7236 tid = ntohl (peer_msg->tunnel_id);
7237 t = tunnel_get_by_local_id (c, tid);
7241 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7246 GNUNET_array_append(t->blacklisted, t->nblacklisted,
7247 GNUNET_PEER_intern(&peer_msg->peer));
7252 * Handler for unblacklist requests of peers in a tunnel
7254 * @param cls closure
7255 * @param client identification of the client
7256 * @param message the actual message (PeerControl)
7259 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
7260 const struct GNUNET_MessageHeader *message)
7262 struct GNUNET_MESH_PeerControl *peer_msg;
7263 struct MeshClient *c;
7264 struct MeshTunnel *t;
7265 MESH_TunnelNumber tid;
7269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
7270 /* Sanity check for client registration */
7271 if (NULL == (c = client_get (client)))
7274 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7279 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7281 /* Sanity check for message size */
7282 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7285 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7289 /* Tunnel exists? */
7290 tid = ntohl (peer_msg->tunnel_id);
7291 t = tunnel_get_by_local_id (c, tid);
7295 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7300 /* if peer is not known, complain */
7301 pid = GNUNET_PEER_search (&peer_msg->peer);
7308 /* search and remove from list */
7309 for (i = 0; i < t->nblacklisted; i++)
7311 if (t->blacklisted[i] == pid)
7313 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
7314 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
7319 /* if peer hasn't been blacklisted, complain */
7325 * Handler for connection requests to new peers by type
7327 * @param cls closure
7328 * @param client identification of the client
7329 * @param message the actual message (ConnectPeerByType)
7332 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
7333 const struct GNUNET_MessageHeader *message)
7335 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
7336 struct MeshClient *c;
7337 struct MeshTunnel *t;
7338 struct GNUNET_HashCode hash;
7339 MESH_TunnelNumber tid;
7341 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
7342 /* Sanity check for client registration */
7343 if (NULL == (c = client_get (client)))
7346 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7349 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7351 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
7353 /* Sanity check for message size */
7354 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
7355 ntohs (connect_msg->header.size))
7358 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7362 /* Tunnel exists? */
7363 tid = ntohl (connect_msg->tunnel_id);
7364 t = tunnel_get_by_local_id (c, tid);
7368 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7372 /* Does client own tunnel? */
7373 if (t->owner->handle != client)
7376 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7380 /* Do WE have the service? */
7381 t->type = ntohl (connect_msg->type);
7382 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
7383 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
7384 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
7387 /* Yes! Fast forward, add ourselves to the tunnel and send the
7388 * good news to the client, and alert the destination client of
7389 * an incoming tunnel.
7391 * FIXME send a path create to self, avoid code duplication
7393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
7394 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
7395 peer_info_get (&my_full_id),
7396 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
7399 send_client_peer_connected (t, myid);
7400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
7401 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7403 t->local_tid_dest = next_local_tid++;
7404 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
7405 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
7406 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7410 /* Ok, lets find a peer offering the service */
7411 if (NULL != t->dht_get_type)
7413 GNUNET_DHT_get_stop (t->dht_get_type);
7415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
7416 GNUNET_h2s (&hash));
7418 GNUNET_DHT_get_start (dht_handle,
7419 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
7421 dht_replication_level,
7422 GNUNET_DHT_RO_RECORD_ROUTE |
7423 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7425 &dht_get_type_handler, t);
7427 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7433 * Handler for connection requests to new peers by a string service description.
7435 * @param cls closure
7436 * @param client identification of the client
7437 * @param message the actual message, which includes messages the client wants
7440 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
7441 const struct GNUNET_MessageHeader *message)
7443 struct GNUNET_MESH_ConnectPeerByString *msg;
7444 struct MeshRegexSearchContext *ctx;
7445 struct MeshRegexSearchInfo *info;
7446 struct GNUNET_DHT_GetHandle *get_h;
7447 struct GNUNET_HashCode key;
7448 struct MeshTunnel *t;
7449 struct MeshClient *c;
7450 MESH_TunnelNumber tid;
7454 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7455 "Connect by string started\n");
7456 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
7457 size = htons (message->size);
7459 /* Sanity check for client registration */
7460 if (NULL == (c = client_get (client)))
7463 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7466 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7468 /* Message size sanity check */
7469 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
7472 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7476 /* Tunnel exists? */
7477 tid = ntohl (msg->tunnel_id);
7478 t = tunnel_get_by_local_id (c, tid);
7482 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7486 /* Does client own tunnel? */
7487 if (t->owner->handle != client)
7490 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7495 " on tunnel %s [%u]\n",
7496 GNUNET_i2s(&my_full_id),
7499 /* Only one connect_by_string allowed at the same time! */
7500 /* FIXME: allow more, return handle at api level to cancel, document */
7501 if (NULL != t->regex_ctx)
7504 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7508 /* Find string itself */
7509 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
7510 string = (const char *) &msg[1];
7512 /* Initialize context */
7513 size = GNUNET_REGEX_get_first_key(string, len, &key);
7514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7515 " consumed %u bits out of %u\n", size, len);
7516 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7517 " looking for %s\n", GNUNET_h2s (&key));
7519 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
7521 info->description = GNUNET_malloc (len + 1);
7522 memcpy (info->description, string, len);
7523 info->description[len] = '\0';
7524 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32, GNUNET_NO);
7525 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32, GNUNET_NO);
7526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
7528 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
7529 ctx->position = size;
7533 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
7535 /* Start search in DHT */
7536 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
7537 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
7538 &key, /* key to search */
7539 dht_replication_level, /* replication level */
7540 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7541 NULL, /* xquery */ // FIXME BLOOMFILTER
7542 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
7543 &dht_get_string_handler, ctx);
7545 GNUNET_break (GNUNET_OK ==
7546 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
7549 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
7551 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
7557 * Handler for client traffic directed to one peer
7559 * @param cls closure
7560 * @param client identification of the client
7561 * @param message the actual message
7564 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
7565 const struct GNUNET_MessageHeader *message)
7567 struct MeshClient *c;
7568 struct MeshTunnel *t;
7569 struct MeshPeerInfo *pi;
7570 struct GNUNET_MESH_Unicast *data_msg;
7571 MESH_TunnelNumber tid;
7574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7575 "Got a unicast request from a client!\n");
7577 /* Sanity check for client registration */
7578 if (NULL == (c = client_get (client)))
7581 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7586 data_msg = (struct GNUNET_MESH_Unicast *) message;
7588 /* Sanity check for message size */
7589 size = ntohs (message->size);
7590 if (sizeof (struct GNUNET_MESH_Unicast) +
7591 sizeof (struct GNUNET_MessageHeader) > size)
7594 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7598 /* Tunnel exists? */
7599 tid = ntohl (data_msg->tid);
7600 t = tunnel_get_by_local_id (c, tid);
7604 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7608 /* Is it a local tunnel? Then, does client own the tunnel? */
7609 if (t->owner->handle != client)
7612 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7616 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
7617 &data_msg->destination.hashPubKey);
7618 /* Is the selected peer in the tunnel? */
7622 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7626 /* PID should be as expected */
7627 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7630 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7631 "Unicast PID, expected %u, got %u\n",
7632 t->fwd_pid + 1, ntohl (data_msg->pid));
7633 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7637 /* Ok, everything is correct, send the message
7638 * (pretend we got it from a mesh peer)
7641 /* Work around const limitation */
7642 char buf[ntohs (message->size)] GNUNET_ALIGN;
7643 struct GNUNET_MESH_Unicast *copy;
7645 copy = (struct GNUNET_MESH_Unicast *) buf;
7646 memcpy (buf, data_msg, size);
7647 copy->oid = my_full_id;
7648 copy->tid = htonl (t->id.tid);
7649 copy->ttl = htonl (default_ttl);
7650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7651 " calling generic handler...\n");
7652 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
7654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
7655 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7662 * Handler for client traffic directed to the origin
7664 * @param cls closure
7665 * @param client identification of the client
7666 * @param message the actual message
7669 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
7670 const struct GNUNET_MessageHeader *message)
7672 struct GNUNET_MESH_ToOrigin *data_msg;
7673 struct MeshTunnelFlowControlInfo *fcinfo;
7674 struct MeshClient *c;
7675 struct MeshTunnel *t;
7676 MESH_TunnelNumber tid;
7679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7680 "Got a ToOrigin request from a client!\n");
7681 /* Sanity check for client registration */
7682 if (NULL == (c = client_get (client)))
7685 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7688 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7690 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
7692 /* Sanity check for message size */
7693 size = ntohs (message->size);
7694 if (sizeof (struct GNUNET_MESH_ToOrigin) +
7695 sizeof (struct GNUNET_MessageHeader) > size)
7698 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7702 /* Tunnel exists? */
7703 tid = ntohl (data_msg->tid);
7704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7705 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
7708 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7711 t = tunnel_get_by_local_id (c, tid);
7714 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7715 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7717 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7721 /* It should be sent by someone who has this as incoming tunnel. */
7722 if (GNUNET_NO == client_knows_tunnel (c, t))
7725 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7729 /* PID should be as expected */
7730 fcinfo = tunnel_get_client_fc (t, c);
7731 if (ntohl (data_msg->pid) != fcinfo->bck_pid + 1)
7734 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7735 "To Origin PID, expected %u, got %u\n",
7736 fcinfo->bck_pid + 1,
7737 ntohl (data_msg->pid));
7738 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7743 /* Ok, everything is correct, send the message
7744 * (pretend we got it from a mesh peer)
7747 char buf[ntohs (message->size)] GNUNET_ALIGN;
7748 struct GNUNET_MESH_ToOrigin *copy;
7750 /* Work around const limitation */
7751 copy = (struct GNUNET_MESH_ToOrigin *) buf;
7752 memcpy (buf, data_msg, size);
7753 GNUNET_PEER_resolve (t->id.oid, ©->oid);
7754 copy->tid = htonl (t->id.tid);
7755 copy->ttl = htonl (default_ttl);
7756 copy->pid = htonl (t->bck_pid + 1);
7758 copy->sender = my_full_id;
7759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7760 " calling generic handler...\n");
7761 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
7763 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7770 * Handler for client traffic directed to all peers in a tunnel
7772 * @param cls closure
7773 * @param client identification of the client
7774 * @param message the actual message
7777 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
7778 const struct GNUNET_MessageHeader *message)
7780 struct MeshClient *c;
7781 struct MeshTunnel *t;
7782 struct GNUNET_MESH_Multicast *data_msg;
7783 MESH_TunnelNumber tid;
7785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7786 "Got a multicast request from a client!\n");
7788 /* Sanity check for client registration */
7789 if (NULL == (c = client_get (client)))
7792 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7795 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7797 data_msg = (struct GNUNET_MESH_Multicast *) message;
7799 /* Sanity check for message size */
7800 if (sizeof (struct GNUNET_MESH_Multicast) +
7801 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
7804 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7808 /* Tunnel exists? */
7809 tid = ntohl (data_msg->tid);
7810 t = tunnel_get_by_local_id (c, tid);
7814 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7815 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7817 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7821 /* Does client own tunnel? */
7822 if (t->owner->handle != client)
7825 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7829 /* PID should be as expected */
7830 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7833 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7834 "Multicast PID, expected %u, got %u\n",
7835 t->fwd_pid + 1, ntohl (data_msg->pid));
7836 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7841 char buf[ntohs (message->size)] GNUNET_ALIGN;
7842 struct GNUNET_MESH_Multicast *copy;
7844 copy = (struct GNUNET_MESH_Multicast *) buf;
7845 memcpy (buf, message, ntohs (message->size));
7846 copy->oid = my_full_id;
7847 copy->tid = htonl (t->id.tid);
7848 copy->ttl = htonl (default_ttl);
7849 GNUNET_assert (ntohl (copy->pid) == (t->fwd_pid + 1));
7850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7851 " calling generic handler...\n");
7852 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
7855 GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
7861 * Handler for client's ACKs for payload traffic.
7863 * @param cls Closure (unused).
7864 * @param client Identification of the client.
7865 * @param message The actual message.
7868 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
7869 const struct GNUNET_MessageHeader *message)
7871 struct GNUNET_MESH_LocalAck *msg;
7872 struct MeshTunnel *t;
7873 struct MeshClient *c;
7874 MESH_TunnelNumber tid;
7877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
7878 /* Sanity check for client registration */
7879 if (NULL == (c = client_get (client)))
7882 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7887 msg = (struct GNUNET_MESH_LocalAck *) message;
7889 /* Tunnel exists? */
7890 tid = ntohl (msg->tunnel_id);
7891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7892 t = tunnel_get_by_local_id (c, tid);
7896 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7897 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7898 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7902 ack = ntohl (msg->max_pid);
7903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
7905 /* Does client own tunnel? I.E: Is this and ACK for BCK traffic? */
7906 if (NULL != t->owner && t->owner->handle == client)
7908 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
7910 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7914 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
7915 tunnel_set_client_fwd_ack (t, c, ack);
7916 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7919 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7926 * Functions to handle messages from clients
7928 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
7929 {&handle_local_new_client, NULL,
7930 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
7931 {&handle_local_announce_regex, NULL,
7932 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
7933 {&handle_local_tunnel_create, NULL,
7934 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
7935 sizeof (struct GNUNET_MESH_TunnelMessage)},
7936 {&handle_local_tunnel_destroy, NULL,
7937 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
7938 sizeof (struct GNUNET_MESH_TunnelMessage)},
7939 {&handle_local_tunnel_speed, NULL,
7940 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
7941 sizeof (struct GNUNET_MESH_TunnelMessage)},
7942 {&handle_local_tunnel_speed, NULL,
7943 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
7944 sizeof (struct GNUNET_MESH_TunnelMessage)},
7945 {&handle_local_tunnel_buffer, NULL,
7946 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
7947 sizeof (struct GNUNET_MESH_TunnelMessage)},
7948 {&handle_local_tunnel_buffer, NULL,
7949 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
7950 sizeof (struct GNUNET_MESH_TunnelMessage)},
7951 {&handle_local_connect_add, NULL,
7952 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
7953 sizeof (struct GNUNET_MESH_PeerControl)},
7954 {&handle_local_connect_del, NULL,
7955 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
7956 sizeof (struct GNUNET_MESH_PeerControl)},
7957 {&handle_local_blacklist, NULL,
7958 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
7959 sizeof (struct GNUNET_MESH_PeerControl)},
7960 {&handle_local_unblacklist, NULL,
7961 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
7962 sizeof (struct GNUNET_MESH_PeerControl)},
7963 {&handle_local_connect_by_type, NULL,
7964 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
7965 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
7966 {&handle_local_connect_by_string, NULL,
7967 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
7968 {&handle_local_unicast, NULL,
7969 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
7970 {&handle_local_to_origin, NULL,
7971 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
7972 {&handle_local_multicast, NULL,
7973 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
7974 {&handle_local_ack, NULL,
7975 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
7976 sizeof (struct GNUNET_MESH_LocalAck)},
7982 * To be called on core init/fail.
7984 * @param cls service closure
7985 * @param server handle to the server for this service
7986 * @param identity the public identity of this peer
7989 core_init (void *cls, struct GNUNET_CORE_Handle *server,
7990 const struct GNUNET_PeerIdentity *identity)
7993 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
7994 core_handle = server;
7995 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
7998 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
7999 GNUNET_SCHEDULER_shutdown (); // Try gracefully
8001 GNUNET_abort(); // Try harder
8008 * Method called whenever a given peer connects.
8010 * @param cls closure
8011 * @param peer peer identity this notification is about
8012 * @param atsi performance data for the connection
8013 * @param atsi_count number of records in 'atsi'
8016 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
8017 const struct GNUNET_ATS_Information *atsi,
8018 unsigned int atsi_count)
8020 struct MeshPeerInfo *peer_info;
8021 struct MeshPeerPath *path;
8023 DEBUG_CONN ("Peer connected\n");
8024 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
8025 peer_info = peer_info_get (peer);
8026 if (myid == peer_info->id)
8028 DEBUG_CONN (" (self)\n");
8033 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
8035 path = path_new (2);
8036 path->peers[0] = myid;
8037 path->peers[1] = peer_info->id;
8038 GNUNET_PEER_change_rc (myid, 1);
8039 GNUNET_PEER_change_rc (peer_info->id, 1);
8040 peer_info_add_path (peer_info, path, GNUNET_YES);
8041 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
8047 * Method called whenever a peer disconnects.
8049 * @param cls closure
8050 * @param peer peer identity this notification is about
8053 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
8055 struct MeshPeerInfo *pi;
8056 struct MeshPeerQueue *q;
8057 struct MeshPeerQueue *n;
8059 DEBUG_CONN ("Peer disconnected\n");
8060 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
8070 /* TODO try to reroute this traffic instead */
8071 queue_destroy(q, GNUNET_YES);
8074 if (NULL != pi->core_transmit)
8076 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
8077 pi->core_transmit = NULL;
8079 peer_info_remove_path (pi, pi->id, myid);
8082 DEBUG_CONN (" (self)\n");
8084 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
8089 /******************************************************************************/
8090 /************************ MAIN FUNCTIONS ****************************/
8091 /******************************************************************************/
8094 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
8096 * @param cls closure
8097 * @param key current key code
8098 * @param value value in the hash map
8099 * @return GNUNET_YES if we should continue to iterate,
8103 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
8105 struct MeshTunnel *t = value;
8112 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
8114 * @param cls closure
8115 * @param key current key code
8116 * @param value value in the hash map
8117 * @return GNUNET_YES if we should continue to iterate,
8121 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
8123 struct MeshPeerInfo *p = value;
8124 struct MeshPeerQueue *q;
8125 struct MeshPeerQueue *n;
8133 queue_destroy(q, GNUNET_YES);
8137 peer_info_destroy (p);
8143 * Task run during shutdown.
8149 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
8151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
8153 if (core_handle != NULL)
8155 GNUNET_CORE_disconnect (core_handle);
8160 GNUNET_CRYPTO_rsa_key_create_stop (keygen);
8163 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
8164 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
8165 if (dht_handle != NULL)
8167 GNUNET_DHT_disconnect (dht_handle);
8172 GNUNET_SERVER_notification_context_destroy (nc);
8175 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
8177 GNUNET_SCHEDULER_cancel (announce_id_task);
8178 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
8180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
8185 * Callback for hostkey read/generation
8188 * @param pk the private key
8189 * @param emsg error message
8192 key_generation_cb (void *cls,
8193 struct GNUNET_CRYPTO_RsaPrivateKey *pk,
8196 struct MeshPeerInfo *peer;
8197 struct MeshPeerPath *p;
8202 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8203 _("Mesh service could not access hostkey. Exiting.\n"));
8204 GNUNET_SCHEDULER_shutdown ();
8207 my_private_key = pk;
8208 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
8209 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
8210 &my_full_id.hashPubKey);
8211 myid = GNUNET_PEER_intern (&my_full_id);
8212 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8213 "Mesh for peer [%s] starting\n",
8214 GNUNET_i2s(&my_full_id));
8216 // transport_handle = GNUNET_TRANSPORT_connect(c,
8226 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
8229 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
8230 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
8231 GNUNET_SERVER_disconnect_notify (server_handle,
8232 &handle_local_client_disconnect, NULL);
8236 clients_tail = NULL;
8239 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
8240 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
8242 /* Create a peer_info for the local peer */
8243 peer = peer_info_get (&my_full_id);
8246 GNUNET_PEER_change_rc (myid, 1);
8247 peer_info_add_path (peer, p, GNUNET_YES);
8248 GNUNET_SERVER_resume (server_handle);
8249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
8254 * Process mesh requests.
8256 * @param cls closure
8257 * @param server the initialized server
8258 * @param c configuration to use
8261 run (void *cls, struct GNUNET_SERVER_Handle *server,
8262 const struct GNUNET_CONFIGURATION_Handle *c)
8266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
8267 server_handle = server;
8268 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
8269 NULL, /* Closure passed to MESH functions */
8270 &core_init, /* Call core_init once connected */
8271 &core_connect, /* Handle connects */
8272 &core_disconnect, /* remove peers on disconnects */
8273 NULL, /* Don't notify about all incoming messages */
8274 GNUNET_NO, /* For header only in notification */
8275 NULL, /* Don't notify about all outbound messages */
8276 GNUNET_NO, /* For header-only out notification */
8277 core_handlers); /* Register these handlers */
8279 if (core_handle == NULL)
8282 GNUNET_SCHEDULER_shutdown ();
8287 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
8290 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8292 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8294 GNUNET_SCHEDULER_shutdown ();
8299 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
8300 &refresh_path_time))
8302 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8304 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8305 "mesh", "refresh path time");
8306 GNUNET_SCHEDULER_shutdown ();
8311 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
8312 &app_announce_time))
8314 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8316 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8317 "mesh", "app announce time");
8318 GNUNET_SCHEDULER_shutdown ();
8321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "APP_ANNOUNCE_TIME %llu ms\n", app_announce_time.rel_value);
8324 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
8327 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8329 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8330 "mesh", "id announce time");
8331 GNUNET_SCHEDULER_shutdown ();
8339 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
8342 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8344 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8345 "mesh", "connect timeout");
8346 GNUNET_SCHEDULER_shutdown ();
8351 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
8354 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8356 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8357 "mesh", "max msgs queue");
8358 GNUNET_SCHEDULER_shutdown ();
8363 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
8366 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8368 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8369 "mesh", "max tunnels");
8370 GNUNET_SCHEDULER_shutdown ();
8375 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
8378 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8380 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8381 "mesh", "default ttl", 64);
8386 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
8387 &dht_replication_level))
8389 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8391 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8392 "mesh", "dht replication level", 10);
8393 dht_replication_level = 10;
8396 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8397 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8398 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8399 applications = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8400 types = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8402 dht_handle = GNUNET_DHT_connect (c, 64);
8403 if (NULL == dht_handle)
8407 stats = GNUNET_STATISTICS_create ("mesh", c);
8409 GNUNET_SERVER_suspend (server_handle);
8410 /* Scheduled the task to clean up when shutdown is called */
8411 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
8413 keygen = GNUNET_CRYPTO_rsa_key_create_start (keyfile, &key_generation_cb, NULL);
8414 GNUNET_free (keyfile);
8419 * The main function for the mesh service.
8421 * @param argc number of arguments from the command line
8422 * @param argv command line arguments
8423 * @return 0 ok, 1 on error
8426 main (int argc, char *const *argv)
8431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
8432 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
8434 ret = (GNUNET_OK == r) ? 0 : 1;
8435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
8439 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8440 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
8441 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);