2 This file is part of GNUnet.
3 (C) 2001-2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
41 * - relay corking down to core
42 * - set ttl relative to tree depth
43 * - Add data ACK count in path ACK
44 * - Make common GNUNET_MESH_Data header for unicast, to_orig, multicast
50 #include "mesh_protocol.h"
51 #include "mesh_tunnel_tree.h"
52 #include "block_mesh.h"
53 #include "mesh_block_lib.h"
54 #include "gnunet_dht_service.h"
55 #include "gnunet_statistics_service.h"
56 #include "gnunet_regex_lib.h"
58 #define MESH_BLOOM_SIZE 128
60 #define MESH_DEBUG_DHT GNUNET_NO
61 #define MESH_DEBUG_CONNECTION GNUNET_NO
62 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
64 #if MESH_DEBUG_CONNECTION
65 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
67 #define DEBUG_CONN(...)
71 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
73 #define DEBUG_DHT(...)
80 struct timespec __mesh_start;
81 struct timespec __mesh_end;
82 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
83 #define INTERVAL_END \
85 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
86 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
87 if (__diff < 0) __diff += 1000000000;\
91 #define INTERVAL_SHOW \
93 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
95 #define INTERVAL_START
100 /******************************************************************************/
101 /************************ DATA STRUCTURES ****************************/
102 /******************************************************************************/
104 /** FWD declaration */
110 * Struct representing a piece of data being sent to other peers
114 /** Tunnel it belongs to. */
115 struct MeshTunnel *t;
117 /** How many remaining neighbors still hav't got it. */
118 unsigned int reference_counter;
120 /** How many remaining neighbors we need to send this to. */
121 unsigned int total_out;
123 /** Size of the data. */
132 * Struct containing info about a queued transmission to this peer
139 struct MeshPeerQueue *next;
144 struct MeshPeerQueue *prev;
147 * Peer this transmission is directed to.
149 struct MeshPeerInfo *peer;
152 * Tunnel this message belongs to.
154 struct MeshTunnel *tunnel;
157 * Pointer to info stucture used as cls.
167 * Size of the message
174 * Struct containing all info possibly needed to build a package when called
177 struct MeshTransmissionDescriptor
179 /** ID of the tunnel this packet travels in */
180 struct MESH_TunnelID *origin;
182 /** Who was this message being sent to */
183 struct MeshPeerInfo *peer;
185 /** Ultimate destination of the packet */
186 GNUNET_PEER_Id destination;
188 /** Data descriptor */
189 struct MeshData* mesh_data;
194 * Struct containing all information regarding a given peer
204 * Last time we heard from this peer
206 struct GNUNET_TIME_Absolute last_contact;
209 * Number of attempts to reconnect so far
211 int n_reconnect_attempts;
214 * Paths to reach the peer, ordered by ascending hop count
216 struct MeshPeerPath *path_head;
219 * Paths to reach the peer, ordered by ascending hop count
221 struct MeshPeerPath *path_tail;
224 * Handle to stop the DHT search for a path to this peer
226 struct GNUNET_DHT_GetHandle *dhtget;
229 * Closure given to the DHT GET
231 struct MeshPathInfo *dhtgetcls;
234 * Array of tunnels this peer participates in
235 * (most probably a small amount, therefore not a hashmap)
236 * When the path to the peer changes, notify these tunnels to let them
237 * re-adjust their path trees.
239 struct MeshTunnel **tunnels;
242 * Number of tunnels this peers participates in
244 unsigned int ntunnels;
247 * Transmission queue to core DLL head
249 struct MeshPeerQueue *queue_head;
252 * Transmission queue to core DLL tail
254 struct MeshPeerQueue *queue_tail;
257 * How many messages are in the queue to this peer.
259 unsigned int queue_n;
262 * Handle to for queued transmissions
264 struct GNUNET_CORE_TransmitHandle *core_transmit;
269 * Globally unique tunnel identification (owner + number)
270 * DO NOT USE OVER THE NETWORK
275 * Node that owns the tunnel
280 * Tunnel number to differentiate all the tunnels owned by the node oid
281 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
283 MESH_TunnelNumber tid;
288 * Struct containing all information regarding a tunnel
289 * For an intermediate node the improtant info used will be:
290 * - id Tunnel unique identification
291 * - paths[0] To know where to send it next
292 * - metainfo: ready, speeds, accounting
299 struct MESH_TunnelID id;
302 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
304 MESH_TunnelNumber local_tid;
307 * Local tunnel number for local destination clients (incoming number)
308 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
311 MESH_TunnelNumber local_tid_dest;
314 * Is the speed on the tunnel limited to the slowest peer?
319 * Is the tunnel bufferless (minimum latency)?
324 * Packet ID of the last fwd packet seen (sent/retransmitted/received).
329 * Packet ID of the last bck packet sent (unique counter per hop).
334 * SKIP value for this tunnel.
339 * MeshTunnelChildInfo of all children, indexed by GNUNET_PEER_Id.
340 * Contains the Flow Control info: FWD ACK value received,
341 * last BCK ACK sent, PID and SKIP values.
343 struct GNUNET_CONTAINER_MultiHashMap *children_fc;
346 * Last ACK sent towards the origin (for traffic towards leaf node).
348 uint32_t last_fwd_ack;
351 * BCK ACK value received from the hop towards the owner of the tunnel,
352 * (previous node / owner): up to what message PID can we sent back to him.
357 * How many messages are in the forward queue (towards leaves).
359 unsigned int fwd_queue_n;
362 * How many messages do we accept in the forward queue.
364 unsigned int fwd_queue_max;
367 * How many messages are in the backward queue (towards origin).
369 unsigned int bck_queue_n;
372 * How many messages do we accept in the backward queue.
374 unsigned int bck_queue_max;
377 * Task to poll peer in case of a stall.
379 GNUNET_SCHEDULER_TaskIdentifier fc_poll_bck;
382 * Last time the tunnel was used
384 struct GNUNET_TIME_Absolute timestamp;
387 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
388 * containing peers added by id or by type, not intermediate peers.
390 struct GNUNET_CONTAINER_MultiHashMap *peers;
393 * Number of peers that are connected and potentially ready to receive data
395 unsigned int peers_ready;
398 * Number of peers that have been added to the tunnel
400 unsigned int peers_total;
403 * Client owner of the tunnel, if any
405 struct MeshClient *owner;
408 * Clients that have been informed about and want to stay in the tunnel.
410 struct MeshClient **clients;
413 * Flow control info for each client.
415 struct MeshTunnelClientInfo *clients_fc;
418 * Number of elements in clients/clients_fc
420 unsigned int nclients;
423 * Clients that have been informed but requested to leave the tunnel.
425 struct MeshClient **ignore;
428 * Number of elements in clients
430 unsigned int nignore;
435 GNUNET_PEER_Id *blacklisted;
438 * Number of elements in blacklisted
440 unsigned int nblacklisted;
443 * Bloomfilter (for peer identities) to stop circular routes
445 char bloomfilter[MESH_BLOOM_SIZE];
450 struct MeshTunnelTree *tree;
453 * Application type we are looking for in this tunnel
455 GNUNET_MESH_ApplicationType type;
458 * Used to search peers offering a service
460 struct GNUNET_DHT_GetHandle *dht_get_type;
463 * Initial context of the regex search for a connect_by_string
465 struct MeshRegexSearchContext *regex_ctx;
468 * Task to keep the used paths alive
470 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
473 * Task to destroy the tunnel after timeout
475 * FIXME: merge the two? a tunnel will have either
476 * a path refresh OR a timeout, never both!
478 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
481 * Flag to signal the destruction of the tunnel.
482 * If this is set GNUNET_YES the tunnel will be destroyed
483 * when the queue is empty.
490 * Info about a child node in a tunnel, needed to perform flow control.
492 struct MeshTunnelChildInfo
495 * ID of the child node.
510 * Maximum PID allowed (FWD ACK received).
515 * Last ACK sent to that child (BCK ACK).
520 * Circular buffer pointing to MeshPeerQueue elements for all
521 * payload traffic going to this child.
522 * Size determined by the tunnel queue size (@c t->fwd_queue_max).
524 struct MeshPeerQueue **send_buffer;
527 * Index of the oldest element in the send_buffer.
529 unsigned int send_buffer_start;
532 * How many elements are already in the buffer.
534 unsigned int send_buffer_n;
537 * Tunnel this info is about
539 struct MeshTunnel *t;
542 * Task to poll peer in case of a stall.
544 GNUNET_SCHEDULER_TaskIdentifier fc_poll;
549 * Info about a leaf client of a tunnel, needed to perform flow control.
551 struct MeshTunnelClientInfo
554 * PID of the last packet sent to the client (FWD).
559 * PID of the last packet received from the client (BCK).
564 * Maximum PID allowed (FWD ACK received).
569 * Last ACK sent to that child (BCK ACK).
577 * Info collected during iteration of child nodes in order to get the ACK value
580 struct MeshTunnelChildIteratorContext
583 * Tunnel whose info is being collected.
585 struct MeshTunnel *t;
588 * Is this context initialized? Is the value in max_child_ack valid?
593 * Maximum child ACK so far.
595 uint32_t max_child_ack;
598 * Number of children nodes
600 unsigned int nchildren;
605 * Info needed to work with tunnel paths and peers
612 struct MeshTunnel *t;
615 * Neighbouring peer to whom we send the packet to
617 struct MeshPeerInfo *peer;
622 struct MeshPeerPath *path;
627 * Struct containing information about a client of the service
634 struct MeshClient *next;
639 struct MeshClient *prev;
642 * Tunnels that belong to this client, indexed by local id
644 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
647 * Tunnels this client has accepted, indexed by incoming local id
649 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
652 * Tunnels this client has rejected, indexed by incoming local id
654 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
656 * Handle to communicate with the client
658 struct GNUNET_SERVER_Client *handle;
661 * Applications that this client has claimed to provide
663 struct GNUNET_CONTAINER_MultiHashMap *apps;
666 * Messages that this client has declared interest in
668 struct GNUNET_CONTAINER_MultiHashMap *types;
671 * Whether the client is active or shutting down (don't send confirmations
672 * to a client that is shutting down.
677 * ID of the client, mainly for debug messages
682 * Regular expressions describing the services offered by this client.
684 char **regexes; // FIXME add timeout? API to remove a regex?
687 * Number of regular expressions in regexes.
689 unsigned int n_regex;
692 * Task to refresh all regular expresions in the DHT.
694 GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
700 * Struct to keep information of searches of services described by a regex
701 * using a user-provided string service description.
703 struct MeshRegexSearchInfo
706 * Which tunnel is this for
708 struct MeshTunnel *t;
711 * User provided description of the searched service.
716 * Part of the description already consumed by the search.
723 struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
726 * Results from running DHT GETs.
728 struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
731 * Contexts, for each running DHT GET. Free all on end of search.
733 struct MeshRegexSearchContext **contexts;
736 * Number of contexts (branches/steps in search).
738 unsigned int n_contexts;
741 * Peer that is connecting via connect_by_string. When connected, free ctx.
746 * Other peers that are found but not yet being connected to.
748 GNUNET_PEER_Id *peers;
751 * Number of elements in peers.
753 unsigned int n_peers;
756 * Next peer to try to connect to.
761 * Timeout for a connect attempt.
762 * When reached, try to connect to a different peer, if any. If not,
763 * try the same peer again.
765 GNUNET_SCHEDULER_TaskIdentifier timeout;
770 * Struct to keep state of running searches that have consumed a part of
773 struct MeshRegexSearchContext
776 * Part of the description already consumed by
777 * this particular search branch.
782 * Information about the search.
784 struct MeshRegexSearchInfo *info;
787 * We just want to look for one edge, the longer the better.
790 unsigned int longest_match;
793 * Destination hash of the longest match.
795 struct GNUNET_HashCode hash;
798 /******************************************************************************/
799 /************************ DEBUG FUNCTIONS ****************************/
800 /******************************************************************************/
804 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
805 * @param cls string to print
806 * @param success GNUNET_OK if the PUT was transmitted,
807 * GNUNET_NO on timeout,
808 * GNUNET_SYSERR on disconnect from service
809 * after the PUT message was transmitted
810 * (so we don't know if it was received or not)
815 mesh_debug (void *cls, int success)
819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
823 unsigned int debug_fwd_ack;
824 unsigned int debug_bck_ack;
828 /******************************************************************************/
829 /*********************** GLOBAL VARIABLES ****************************/
830 /******************************************************************************/
833 * Configuration parameters
835 static struct GNUNET_TIME_Relative refresh_path_time;
836 static struct GNUNET_TIME_Relative app_announce_time;
837 static struct GNUNET_TIME_Relative id_announce_time;
838 static struct GNUNET_TIME_Relative unacknowledged_wait_time;
839 static struct GNUNET_TIME_Relative connect_timeout;
840 static unsigned long long default_ttl;
841 static unsigned long long dht_replication_level;
842 static unsigned long long max_tunnels;
843 static unsigned long long max_msgs_queue;
847 * Hostkey generation context
849 static struct GNUNET_CRYPTO_RsaKeyGenerationContext *keygen;
852 * DLL with all the clients, head.
854 static struct MeshClient *clients;
857 * DLL with all the clients, tail.
859 static struct MeshClient *clients_tail;
862 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
864 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
867 * Number of tunnels known.
869 static unsigned long long n_tunnels;
872 * Tunnels incoming, indexed by MESH_TunnelNumber
873 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
875 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
878 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
880 static struct GNUNET_CONTAINER_MultiHashMap *peers;
883 * Handle to communicate with transport
885 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
888 * Handle to communicate with core.
890 static struct GNUNET_CORE_Handle *core_handle;
895 static struct GNUNET_DHT_Handle *dht_handle;
900 static struct GNUNET_SERVER_Handle *server_handle;
903 * Handle to the statistics service.
905 static struct GNUNET_STATISTICS_Handle *stats;
908 * Notification context, to send messages to local clients.
910 static struct GNUNET_SERVER_NotificationContext *nc;
913 * Local peer own ID (memory efficient handle).
915 static GNUNET_PEER_Id myid;
918 * Local peer own ID (full value).
920 static struct GNUNET_PeerIdentity my_full_id;
925 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
930 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
933 * Tunnel ID for the next created tunnel (global tunnel number).
935 static MESH_TunnelNumber next_tid;
938 * Tunnel ID for the next incoming tunnel (local tunnel number).
940 static MESH_TunnelNumber next_local_tid;
943 * All application types provided by this peer.
945 static struct GNUNET_CONTAINER_MultiHashMap *applications;
948 * All message types clients of this peer are interested in.
950 static struct GNUNET_CONTAINER_MultiHashMap *types;
953 * Task to periodically announce provided applications.
955 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
958 * Task to periodically announce itself in the network.
960 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
963 * Next ID to assign to a client.
965 unsigned int next_client_id;
968 /******************************************************************************/
969 /*********************** DECLARATIONS **************************/
970 /******************************************************************************/
973 * Function to process paths received for a new peer addition. The recorded
974 * paths form the initial tunnel, which can be optimized later.
975 * Called on each result obtained for the DHT search.
978 * @param exp when will this value expire
979 * @param key key of the result
980 * @param type type of the result
981 * @param size number of bytes in data
982 * @param data pointer to the result data
985 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
986 const struct GNUNET_HashCode * key,
987 const struct GNUNET_PeerIdentity *get_path,
988 unsigned int get_path_length,
989 const struct GNUNET_PeerIdentity *put_path,
990 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
991 size_t size, const void *data);
995 * Function to process DHT string to regex matching.
996 * Called on each result obtained for the DHT search.
998 * @param cls closure (search context)
999 * @param exp when will this value expire
1000 * @param key key of the result
1001 * @param get_path path of the get request (not used)
1002 * @param get_path_length lenght of get_path (not used)
1003 * @param put_path path of the put request (not used)
1004 * @param put_path_length length of the put_path (not used)
1005 * @param type type of the result
1006 * @param size number of bytes in data
1007 * @param data pointer to the result data
1009 * TODO: re-issue the request after certain time? cancel after X results?
1012 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1013 const struct GNUNET_HashCode * key,
1014 const struct GNUNET_PeerIdentity *get_path,
1015 unsigned int get_path_length,
1016 const struct GNUNET_PeerIdentity *put_path,
1017 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
1018 size_t size, const void *data);
1022 * Function to process DHT string to regex matching.
1023 * Called on each result obtained for the DHT search.
1025 * @param cls closure (search context)
1026 * @param exp when will this value expire
1027 * @param key key of the result
1028 * @param get_path path of the get request (not used)
1029 * @param get_path_length lenght of get_path (not used)
1030 * @param put_path path of the put request (not used)
1031 * @param put_path_length length of the put_path (not used)
1032 * @param type type of the result
1033 * @param size number of bytes in data
1034 * @param data pointer to the result data
1037 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1038 const struct GNUNET_HashCode * key,
1039 const struct GNUNET_PeerIdentity *get_path,
1040 unsigned int get_path_length,
1041 const struct GNUNET_PeerIdentity *put_path,
1042 unsigned int put_path_length,
1043 enum GNUNET_BLOCK_Type type,
1044 size_t size, const void *data);
1048 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1049 * and insert it in the appropiate structures if the peer is not known yet.
1051 * @param peer Short identity of the peer.
1053 * @return Existing or newly created peer info.
1055 static struct MeshPeerInfo *
1056 peer_info_get_short (const GNUNET_PEER_Id peer);
1060 * Try to establish a new connection to this peer.
1061 * Use the best path for the given tunnel.
1062 * If the peer doesn't have any path to it yet, try to get one.
1063 * If the peer already has some path, send a CREATE PATH towards it.
1065 * @param peer PeerInfo of the peer.
1066 * @param t Tunnel for which to create the path, if possible.
1069 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
1073 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1074 * needed rescources.
1075 * If peer already exists, reevaluate shortest path and change if different.
1077 * @param t Tunnel we want to add a new peer to
1078 * @param peer PeerInfo of the peer being added
1082 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
1086 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1087 * that are no longer needed, as well as nodes of no longer reachable peers.
1088 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1090 * @param t Tunnel from which to remove the path.
1091 * @param peer Short id of the peer which should be removed.
1094 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
1098 * Search for a tunnel by global ID using full PeerIdentities.
1100 * @param oid owner of the tunnel.
1101 * @param tid global tunnel number.
1103 * @return tunnel handler, NULL if doesn't exist.
1105 static struct MeshTunnel *
1106 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
1110 * Delete an active client from the tunnel.
1116 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
1119 * Notify a tunnel that a connection has broken that affects at least
1120 * some of its peers.
1122 * @param t Tunnel affected.
1123 * @param p1 Peer that got disconnected from p2.
1124 * @param p2 Peer that got disconnected from p1.
1126 * @return Short ID of the peer disconnected (either p1 or p2).
1127 * 0 if the tunnel remained unaffected.
1129 static GNUNET_PEER_Id
1130 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1135 * Get the current ack value for a tunnel, for data going from root to leaves,
1136 * taking in account the tunnel mode and the status of all children and clients.
1140 * @return Maximum PID allowed.
1143 tunnel_get_fwd_ack (struct MeshTunnel *t);
1147 * Add a client to a tunnel, initializing all needed data structures.
1149 * @param t Tunnel to which add the client.
1150 * @param c Client which to add to the tunnel.
1153 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c);
1157 * Jump to the next edge, with the longest matching token.
1159 * @param block Block found in the DHT.
1160 * @param size Size of the block.
1161 * @param ctx Context of the search.
1163 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1166 regex_next_edge (const struct MeshRegexBlock *block,
1168 struct MeshRegexSearchContext *ctx);
1172 * Find a path to a peer that offers a regex servcie compatible
1173 * with a given string.
1175 * @param key The key of the accepting state.
1176 * @param ctx Context containing info about the string, tunnel, etc.
1179 regex_find_path (const struct GNUNET_HashCode *key,
1180 struct MeshRegexSearchContext *ctx);
1184 * @brief Queue and pass message to core when possible.
1186 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
1187 * and accounts for it. In case the queue is full, the message is dropped and
1190 * Otherwise, message is treated as internal and allowed to go regardless of
1193 * @param cls Closure (@c type dependant). It will be used by queue_send to
1194 * build the message to be sent if not already prebuilt.
1195 * @param type Type of the message, 0 for a raw message.
1196 * @param size Size of the message.
1197 * @param dst Neighbor to send message to.
1198 * @param t Tunnel this message belongs to.
1201 queue_add (void *cls, uint16_t type, size_t size,
1202 struct MeshPeerInfo *dst, struct MeshTunnel *t);
1206 * Free a transmission that was already queued with all resources
1207 * associated to the request.
1209 * @param queue Queue handler to cancel.
1210 * @param clear_cls Is it necessary to free associated cls?
1213 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1217 * @brief Get the next transmittable message from the queue.
1219 * This will be the head, except in the case of being a data packet
1220 * not allowed by the destination peer.
1222 * @param peer Destination peer.
1224 * @return The next viable MeshPeerQueue element to send to that peer.
1225 * NULL when there are no transmittable messages.
1227 struct MeshPeerQueue *
1228 queue_get_next (const struct MeshPeerInfo *peer);
1232 * Core callback to write a queued packet to core buffer
1234 * @param cls Closure (peer info).
1235 * @param size Number of bytes available in buf.
1236 * @param buf Where the to write the message.
1238 * @return number of bytes written to buf
1241 queue_send (void *cls, size_t size, void *buf);
1243 /******************************************************************************/
1244 /************************ ITERATORS ****************************/
1245 /******************************************************************************/
1248 * Iterator over found existing mesh regex blocks that match an ongoing search.
1250 * @param cls closure
1251 * @param key current key code
1252 * @param value value in the hash map
1253 * @return GNUNET_YES if we should continue to iterate,
1257 regex_result_iterator (void *cls,
1258 const struct GNUNET_HashCode * key,
1261 struct MeshRegexBlock *block = value;
1262 struct MeshRegexSearchContext *ctx = cls;
1264 if (GNUNET_YES == ntohl(block->accepting) &&
1265 ctx->position == strlen (ctx->info->description))
1267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
1268 regex_find_path (key, ctx);
1269 return GNUNET_YES; // We found an accept state!
1273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
1274 ctx->position, strlen(ctx->info->description),
1275 ntohl(block->accepting));
1278 regex_next_edge(block, SIZE_MAX, ctx);
1285 * Iterator over edges in a regex block retrieved from the DHT.
1287 * @param cls Closure (context of the search).
1288 * @param token Token that follows to next state.
1289 * @param len Lenght of token.
1290 * @param key Hash of next state.
1292 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1295 regex_edge_iterator (void *cls,
1298 const struct GNUNET_HashCode *key)
1300 struct MeshRegexSearchContext *ctx = cls;
1301 struct MeshRegexSearchInfo *info = ctx->info;
1305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
1306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
1307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
1308 current = &info->description[ctx->position];
1309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
1310 current_len = strlen (info->description) - ctx->position;
1311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
1312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
1313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tk[0] : %c\n", token[0]);
1314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
1315 if (len > current_len)
1317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
1318 return GNUNET_YES; // Token too long, wont match
1320 if (0 != strncmp (current, token, len))
1322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
1323 return GNUNET_YES; // Token doesn't match
1326 if (len > ctx->longest_match)
1328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token is longer, KEEP\n");
1329 ctx->longest_match = len;
1334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token is not longer, IGNORE\n");
1337 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
1343 * Jump to the next edge, with the longest matching token.
1345 * @param block Block found in the DHT.
1346 * @param size Size of the block.
1347 * @param ctx Context of the search.
1349 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1352 regex_next_edge (const struct MeshRegexBlock *block,
1354 struct MeshRegexSearchContext *ctx)
1356 struct MeshRegexSearchContext *new_ctx;
1357 struct MeshRegexSearchInfo *info = ctx->info;
1358 struct GNUNET_DHT_GetHandle *get_h;
1362 /* Find the longest match for the current string position,
1363 * among tokens in the given block */
1364 ctx->longest_match = 0;
1365 result = GNUNET_MESH_regex_block_iterate (block, size,
1366 ®ex_edge_iterator, ctx);
1367 GNUNET_break (GNUNET_OK == result || SIZE_MAX == size);
1369 /* Did anything match? */
1370 if (0 == ctx->longest_match)
1373 new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
1374 new_ctx->info = info;
1375 new_ctx->position = ctx->position + ctx->longest_match;
1376 GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
1378 /* Check whether we already have a DHT GET running for it */
1380 GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, &ctx->hash))
1382 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
1383 GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results,
1385 ®ex_result_iterator,
1387 return; // We are already looking for it
1390 /* Start search in DHT */
1392 GNUNET_DHT_get_start (dht_handle, /* handle */
1393 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
1394 &ctx->hash, /* key to search */
1395 dht_replication_level, /* replication level */
1396 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1397 NULL, /* xquery */ // FIXME BLOOMFILTER
1398 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1399 &dht_get_string_handler, new_ctx);
1401 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
1404 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1413 * Iterator over hash map entries to cancel DHT GET requests after a
1414 * successful connect_by_string.
1416 * @param cls Closure (unused).
1417 * @param key Current key code (unused).
1418 * @param value Value in the hash map (get handle).
1419 * @return GNUNET_YES if we should continue to iterate,
1423 regex_cancel_dht_get (void *cls,
1424 const struct GNUNET_HashCode * key,
1427 struct GNUNET_DHT_GetHandle *h = value;
1429 GNUNET_DHT_get_stop (h);
1435 * Iterator over hash map entries to free MeshRegexBlocks stored during the
1436 * search for connect_by_string.
1438 * @param cls Closure (unused).
1439 * @param key Current key code (unused).
1440 * @param value MeshRegexBlock in the hash map.
1441 * @return GNUNET_YES if we should continue to iterate,
1445 regex_free_result (void *cls,
1446 const struct GNUNET_HashCode * key,
1450 GNUNET_free (value);
1456 * Regex callback iterator to store own service description in the DHT.
1458 * @param cls closure.
1459 * @param key hash for current state.
1460 * @param proof proof for current state.
1461 * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
1462 * @param num_edges number of edges leaving current state.
1463 * @param edges edges leaving current state.
1466 regex_iterator (void *cls,
1467 const struct GNUNET_HashCode *key,
1470 unsigned int num_edges,
1471 const struct GNUNET_REGEX_Edge *edges)
1473 struct MeshRegexBlock *block;
1474 struct MeshRegexEdge *block_edge;
1475 enum GNUNET_DHT_RouteOption opt;
1479 unsigned int offset;
1482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1483 " regex dht put for state %s\n",
1485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1492 opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
1493 if (GNUNET_YES == accepting)
1495 struct MeshRegexAccept block;
1497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1498 " state %s is accepting, putting own id\n",
1500 size = sizeof (block);
1502 block.id = my_full_id;
1504 GNUNET_DHT_put(dht_handle, key,
1505 dht_replication_level,
1506 opt | GNUNET_DHT_RO_RECORD_ROUTE,
1507 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
1510 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1515 len = strlen(proof);
1516 size = sizeof (struct MeshRegexBlock) + len;
1517 block = GNUNET_malloc (size);
1520 block->n_proof = htonl (len);
1521 block->n_edges = htonl (num_edges);
1522 block->accepting = htonl (accepting);
1524 /* Store the proof at the end of the block. */
1525 aux = (char *) &block[1];
1526 memcpy (aux, proof, len);
1529 /* Store each edge in a variable length MeshEdge struct at the
1530 * very end of the MeshRegexBlock structure.
1532 for (i = 0; i < num_edges; i++)
1534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1535 " edge %s towards %s\n",
1537 GNUNET_h2s(&edges[i].destination));
1539 /* aux points at the end of the last block */
1540 len = strlen (edges[i].label);
1541 size += sizeof (struct MeshRegexEdge) + len;
1542 // Calculate offset FIXME is this ok? use size instead?
1543 offset = aux - (char *) block;
1544 block = GNUNET_realloc (block, size);
1545 aux = &((char *) block)[offset];
1546 block_edge = (struct MeshRegexEdge *) aux;
1547 block_edge->key = edges[i].destination;
1548 block_edge->n_token = htonl (len);
1549 aux = (char *) &block_edge[1];
1550 memcpy (aux, edges[i].label, len);
1554 GNUNET_DHT_put(dht_handle, key,
1555 dht_replication_level,
1557 GNUNET_BLOCK_TYPE_MESH_REGEX, size,
1559 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1563 GNUNET_free (block);
1568 * Store the regular expression describing a local service into the DHT.
1570 * @param regex The regular expresion.
1573 regex_put (const char *regex)
1575 struct GNUNET_REGEX_Automaton *dfa;
1577 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) start\n", regex);
1578 dfa = GNUNET_REGEX_construct_dfa (regex, strlen(regex));
1579 GNUNET_REGEX_iterate_all_edges (dfa, ®ex_iterator, NULL);
1580 GNUNET_REGEX_automaton_destroy (dfa);
1581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) end\n", regex);
1586 * Find a path to a peer that offers a regex servcie compatible
1587 * with a given string.
1589 * @param key The key of the accepting state.
1590 * @param ctx Context containing info about the string, tunnel, etc.
1593 regex_find_path (const struct GNUNET_HashCode *key,
1594 struct MeshRegexSearchContext *ctx)
1596 struct GNUNET_DHT_GetHandle *get_h;
1598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
1599 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
1600 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
1601 key, /* key to search */
1602 dht_replication_level, /* replication level */
1603 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE |
1604 GNUNET_DHT_RO_RECORD_ROUTE,
1605 NULL, /* xquery */ // FIXME BLOOMFILTER
1606 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1607 &dht_get_string_accept_handler, ctx);
1608 GNUNET_break (GNUNET_OK ==
1609 GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
1612 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1617 * Function called if the connect attempt to a peer found via
1618 * connect_by_string times out. Try to connect to another peer, if any.
1619 * Otherwise try to reconnect to the same peer.
1621 * @param cls Closure (info about regex search).
1622 * @param tc TaskContext.
1625 regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1627 struct MeshRegexSearchInfo *info = cls;
1628 struct MeshPeerInfo *peer_info;
1632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
1633 info->timeout = GNUNET_SCHEDULER_NO_TASK;
1634 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
1642 if (0 < info->n_peers)
1644 // Select next peer, put current in that spot.
1645 id = info->peers[info->i_peer];
1646 info->peers[info->i_peer] = info->peer;
1647 info->i_peer = (info->i_peer + 1) % info->n_peers;
1651 // Try to connect to same peer again.
1654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
1656 peer_info = peer_info_get_short(id);
1657 tunnel_add_peer (info->t, peer_info);
1659 tunnel_delete_peer (info->t, old);
1660 peer_info_connect (peer_info, info->t);
1661 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
1662 ®ex_connect_timeout,
1664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
1669 * Cancel an ongoing regex search in the DHT and free all resources.
1671 * @param ctx The search context.
1674 regex_cancel_search(struct MeshRegexSearchContext *ctx)
1676 struct MeshRegexSearchInfo *info = ctx->info;
1679 GNUNET_free (info->description);
1680 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
1681 ®ex_cancel_dht_get, NULL);
1682 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
1683 ®ex_free_result, NULL);
1684 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
1685 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
1686 info->t->regex_ctx = NULL;
1687 for (i = 0; i < info->n_contexts; i++)
1689 GNUNET_free (info->contexts[i]);
1691 if (0 < info->n_contexts)
1692 GNUNET_free (info->contexts);
1693 if (0 < info->n_peers)
1694 GNUNET_free (info->peers);
1695 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
1697 GNUNET_SCHEDULER_cancel(info->timeout);
1703 /******************************************************************************/
1704 /************************ PERIODIC FUNCTIONS ****************************/
1705 /******************************************************************************/
1708 * Announce iterator over for each application provided by the peer
1710 * @param cls closure
1711 * @param key current key code
1712 * @param value value in the hash map
1713 * @return GNUNET_YES if we should continue to
1718 announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
1720 struct PBlock block;
1721 struct MeshClient *c;
1723 block.id = my_full_id;
1724 c = GNUNET_CONTAINER_multihashmap_get (applications, key);
1725 GNUNET_assert(NULL != c);
1726 block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
1727 if (0 == block.type)
1732 block.type = htonl (block.type);
1734 GNUNET_break (NULL !=
1735 GNUNET_DHT_put (dht_handle, key,
1736 dht_replication_level,
1737 GNUNET_DHT_RO_RECORD_ROUTE |
1738 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1739 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
1741 (const char *) &block,
1742 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1744 app_announce_time, NULL, NULL));
1750 * Periodically announce what applications are provided by local clients
1753 * @param cls closure
1754 * @param tc task context
1757 announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1759 struct MeshClient *c = cls;
1762 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1764 c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
1768 DEBUG_DHT ("Starting PUT for regex\n");
1770 for (i = 0; i < c->n_regex; i++)
1772 regex_put (c->regexes[i]);
1774 c->regex_announce_task =
1775 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_regex, cls);
1776 DEBUG_DHT ("Finished PUT for regex\n");
1783 * Periodically announce what applications are provided by local clients
1786 * @param cls closure
1787 * @param tc task context
1790 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1792 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1794 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
1798 DEBUG_DHT ("Starting PUT for apps\n");
1800 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
1802 announce_applications_task =
1803 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
1805 DEBUG_DHT ("Finished PUT for apps\n");
1812 * Periodically announce self id in the DHT
1814 * @param cls closure
1815 * @param tc task context
1818 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1820 struct PBlock block;
1822 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1824 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1828 * - Set data expiration in function of X
1829 * - Adapt X to churn
1831 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1833 block.id = my_full_id;
1834 block.type = htonl (0);
1835 GNUNET_DHT_put (dht_handle, /* DHT handle */
1836 &my_full_id.hashPubKey, /* Key to use */
1837 dht_replication_level, /* Replication level */
1838 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1839 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1840 sizeof (block), /* Size of the data */
1841 (const char *) &block, /* Data itself */
1842 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1843 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1844 NULL, /* Continuation */
1845 NULL); /* Continuation closure */
1847 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1851 /******************************************************************************/
1852 /****************** GENERAL HELPER FUNCTIONS ************************/
1853 /******************************************************************************/
1856 * Decrements the reference counter and frees all resources if needed
1858 * @param mesh_data Data Descriptor used in a multicast message.
1859 * Freed no longer needed (last message).
1862 data_descriptor_decrement_rc (struct MeshData *mesh_data)
1864 if (0 == --(mesh_data->reference_counter))
1866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1867 GNUNET_free (mesh_data->data);
1868 GNUNET_free (mesh_data);
1874 * Check if client has registered with the service and has not disconnected
1876 * @param client the client to check
1878 * @return non-NULL if client exists in the global DLL
1880 static struct MeshClient *
1881 client_get (struct GNUNET_SERVER_Client *client)
1883 struct MeshClient *c;
1888 if (c->handle == client)
1897 * Checks if a given client has subscribed to certain message type
1899 * @param message_type Type of message to check
1900 * @param c Client to check
1902 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1904 * FIXME: use of crypto_hash slows it down
1905 * The hash function alone takes 8-10us out of the ~55us for the whole
1906 * process of retransmitting the message from one local client to another.
1907 * Find faster implementation!
1910 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1912 struct GNUNET_HashCode hc;
1914 if (NULL == c->types)
1917 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1918 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1923 * Check whether client wants traffic from a tunnel.
1925 * @param c Client to check.
1926 * @param t Tunnel to be found.
1928 * @return GNUNET_YES if client knows tunnel.
1930 * TODO look in client hashmap
1933 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1937 for (i = 0; i < t->nclients; i++)
1938 if (t->clients[i] == c)
1945 * Check whether client has been informed about a tunnel.
1947 * @param c Client to check.
1948 * @param t Tunnel to be found.
1950 * @return GNUNET_YES if client knows tunnel.
1952 * TODO look in client hashmap
1955 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1959 for (i = 0; i < t->nignore; i++)
1960 if (t->ignore[i] == c)
1962 return client_wants_tunnel(c, t);
1967 * Marks a client as uninterested in traffic from the tunnel, updating both
1968 * client and tunnel to reflect this.
1970 * @param c Client that doesn't want traffic anymore.
1971 * @param t Tunnel which should be ignored.
1973 * FIXME when to delete an incoming tunnel?
1976 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1978 struct GNUNET_HashCode hash;
1980 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1981 GNUNET_break (GNUNET_YES ==
1982 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1984 GNUNET_break (GNUNET_YES ==
1985 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
1986 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1987 tunnel_delete_active_client (t, c);
1988 GNUNET_array_append (t->ignore, t->nignore, c);
1993 * Deletes a tunnel from a client (either owner or destination). To be used on
1994 * tunnel destroy, otherwise, use client_ignore_tunnel.
1996 * @param c Client whose tunnel to delete.
1997 * @param t Tunnel which should be deleted.
2000 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
2002 struct GNUNET_HashCode hash;
2006 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2007 GNUNET_assert (GNUNET_YES ==
2008 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
2014 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2016 GNUNET_assert (GNUNET_YES ==
2017 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
2021 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
2029 * Send the message to all clients that have subscribed to its type
2031 * @param msg Pointer to the message itself
2032 * @param payload Pointer to the payload of the message.
2033 * @param t The tunnel to whose clients this message goes.
2035 * @return number of clients this message was sent to
2038 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
2039 const struct GNUNET_MessageHeader *payload,
2040 struct MeshTunnel *t)
2042 struct MeshClient *c;
2043 MESH_TunnelNumber *tid;
2046 char cbuf[htons (msg->size)];
2048 type = ntohs (payload->type);
2049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
2050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %s\n",
2051 GNUNET_MESH_DEBUG_M2S (type));
2053 memcpy (cbuf, msg, sizeof (cbuf));
2054 switch (htons (msg->type))
2056 struct GNUNET_MESH_Unicast *uc;
2057 struct GNUNET_MESH_Multicast *mc;
2058 struct GNUNET_MESH_ToOrigin *to;
2060 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2061 uc = (struct GNUNET_MESH_Unicast *) cbuf;
2064 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
2065 mc = (struct GNUNET_MESH_Multicast *) cbuf;
2068 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2069 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
2077 for (count = 0, c = clients; c != NULL; c = c->next)
2079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
2080 if (client_is_subscribed (type, c))
2082 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
2086 *tid = htonl (t->local_tid);
2090 if (GNUNET_NO == client_knows_tunnel (c, t))
2092 /* This client doesn't know the tunnel */
2093 struct GNUNET_MESH_TunnelNotification tmsg;
2094 struct GNUNET_HashCode hash;
2096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
2097 tmsg.header.size = htons (sizeof (tmsg));
2098 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2099 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
2100 tmsg.tunnel_id = htonl (t->local_tid_dest);
2102 if (GNUNET_YES == t->speed_min)
2103 tmsg.opt |= MESH_TUNNEL_OPT_SPEED_MIN;
2104 if (GNUNET_YES == t->nobuffer)
2105 tmsg.opt |= MESH_TUNNEL_OPT_NOBUFFER;
2106 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2107 &tmsg.header, GNUNET_NO);
2108 tunnel_add_client (t, c);
2109 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2111 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2112 c->incoming_tunnels, &hash, t,
2113 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2115 *tid = htonl (t->local_tid_dest);
2118 /* Check if the client wants to get traffic from the tunnel */
2119 if (GNUNET_NO == client_wants_tunnel(c, t))
2122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
2123 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2124 (struct GNUNET_MessageHeader
2125 *) cbuf, GNUNET_NO);
2134 * Notify the client that owns the tunnel that a peer has connected to it
2135 * (the requested path to it has been confirmed).
2137 * @param t Tunnel whose owner to notify
2138 * @param id Short id of the peer that has connected
2141 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
2143 struct GNUNET_MESH_PeerControl pc;
2145 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2146 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2147 pc.tunnel_id = htonl (t->local_tid);
2148 GNUNET_PEER_resolve (id, &pc.peer);
2149 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
2155 * Notify all clients (not depending on registration status) that the incoming
2156 * tunnel is no longer valid.
2158 * @param t Tunnel that was destroyed.
2161 send_clients_tunnel_destroy (struct MeshTunnel *t)
2163 struct GNUNET_MESH_TunnelMessage msg;
2165 msg.header.size = htons (sizeof (msg));
2166 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2167 msg.tunnel_id = htonl (t->local_tid_dest);
2168 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
2173 * Notify clients of tunnel disconnections, if needed.
2174 * In case the origin disconnects, the destination clients get a tunnel destroy
2175 * notification. If the last destination disconnects (only one remaining client
2176 * in tunnel), the origin gets a (local ID) peer disconnected.
2177 * Note that the function must be called BEFORE removing the client from
2180 * @param t Tunnel that was destroyed.
2181 * @param c Client that disconnected.
2184 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2190 struct GNUNET_MESH_TunnelMessage msg;
2192 msg.header.size = htons (sizeof (msg));
2193 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2194 msg.tunnel_id = htonl (t->local_tid_dest);
2195 for (i = 0; i < t->nclients; i++)
2196 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2197 &msg.header, GNUNET_NO);
2199 // FIXME when to disconnect an incoming tunnel?
2200 else if (1 == t->nclients && NULL != t->owner)
2202 struct GNUNET_MESH_PeerControl msg;
2204 msg.header.size = htons (sizeof (msg));
2205 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2206 msg.tunnel_id = htonl (t->local_tid);
2207 msg.peer = my_full_id;
2208 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2209 &msg.header, GNUNET_NO);
2215 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2216 * and insert it in the appropiate structures if the peer is not known yet.
2218 * @param peer Full identity of the peer.
2220 * @return Existing or newly created peer info.
2222 static struct MeshPeerInfo *
2223 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2225 struct MeshPeerInfo *peer_info;
2227 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2228 if (NULL == peer_info)
2231 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2232 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2233 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2234 peer_info->id = GNUNET_PEER_intern (peer);
2242 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2243 * and insert it in the appropiate structures if the peer is not known yet.
2245 * @param peer Short identity of the peer.
2247 * @return Existing or newly created peer info.
2249 static struct MeshPeerInfo *
2250 peer_info_get_short (const GNUNET_PEER_Id peer)
2252 struct GNUNET_PeerIdentity id;
2254 GNUNET_PEER_resolve (peer, &id);
2255 return peer_info_get (&id);
2260 * Iterator to remove the tunnel from the list of tunnels a peer participates
2263 * @param cls Closure (tunnel info)
2264 * @param key GNUNET_PeerIdentity of the peer (unused)
2265 * @param value PeerInfo of the peer
2267 * @return always GNUNET_YES, to keep iterating
2270 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2272 struct MeshTunnel *t = cls;
2273 struct MeshPeerInfo *peer = value;
2276 for (i = 0; i < peer->ntunnels; i++)
2279 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2282 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2283 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2292 * Core callback to write a pre-constructed data packet to core buffer
2294 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2295 * @param size Number of bytes available in buf.
2296 * @param buf Where the to write the message.
2298 * @return number of bytes written to buf
2301 send_core_data_raw (void *cls, size_t size, void *buf)
2303 struct MeshTransmissionDescriptor *info = cls;
2304 struct GNUNET_MessageHeader *msg;
2307 GNUNET_assert (NULL != info);
2308 GNUNET_assert (NULL != info->mesh_data);
2309 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2310 total_size = ntohs (msg->size);
2312 if (total_size > size)
2317 memcpy (buf, msg, total_size);
2318 data_descriptor_decrement_rc (info->mesh_data);
2325 * Sends an already built non-multicast message to a peer,
2326 * properly registrating all used resources.
2328 * @param message Message to send. Function makes a copy of it.
2329 * @param peer Short ID of the neighbor whom to send the message.
2330 * @param t Tunnel on which this message is transmitted.
2333 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
2334 const struct GNUNET_PeerIdentity *peer,
2335 struct MeshTunnel *t)
2337 struct MeshTransmissionDescriptor *info;
2338 struct MeshPeerInfo *neighbor;
2339 struct MeshPeerPath *p;
2343 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2345 size = ntohs (message->size);
2346 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2347 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2348 info->mesh_data->data = GNUNET_malloc (size);
2349 memcpy (info->mesh_data->data, message, size);
2350 type = ntohs(message->type);
2351 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2353 struct GNUNET_MESH_Unicast *m;
2355 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2356 m->ttl = htonl (ntohl (m->ttl) - 1);
2358 info->mesh_data->data_len = size;
2359 info->mesh_data->reference_counter = 1;
2360 info->mesh_data->total_out = 1;
2361 neighbor = peer_info_get (peer);
2362 for (p = neighbor->path_head; NULL != p; p = p->next)
2372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2373 " %s IS NOT DIRECTLY CONNECTED\n",
2375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2378 for (p = neighbor->path_head; NULL != p; p = p->next)
2380 struct GNUNET_PeerIdentity debug_id;
2383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2384 " path with %u hops through:\n",
2386 for (i = 0; i < p->length; i++)
2388 GNUNET_PEER_resolve(p->peers[i], &debug_id);
2389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2391 i, GNUNET_i2s(&debug_id));
2395 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2396 GNUNET_free (info->mesh_data->data);
2397 GNUNET_free (info->mesh_data);
2401 info->peer = neighbor;
2402 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
2413 * Sends a CREATE PATH message for a path to a peer, properly registrating
2414 * all used resources.
2416 * @param peer PeerInfo of the final peer for whom this path is being created.
2417 * @param p Path itself.
2418 * @param t Tunnel for which the path is created.
2421 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2422 struct MeshTunnel *t)
2424 struct GNUNET_PeerIdentity id;
2425 struct MeshPathInfo *path_info;
2426 struct MeshPeerInfo *neighbor;
2432 p = tree_get_path_to_peer (t->tree, peer->id);
2439 for (i = 0; i < p->length; i++)
2441 if (p->peers[i] == myid)
2444 if (i >= p->length - 1)
2450 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2452 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2453 path_info->path = p;
2455 neighbor = peer_info_get (&id);
2456 path_info->peer = neighbor;
2457 queue_add (path_info,
2458 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2459 sizeof (struct GNUNET_MESH_ManipulatePath) +
2460 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2467 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2469 * @param t Tunnel whose path to destroy.
2470 * @param destination Short ID of the peer to whom the path to destroy.
2473 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2475 struct MeshPeerPath *p;
2478 p = tree_get_path_to_peer (t->tree, destination);
2484 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2485 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2487 struct GNUNET_MESH_ManipulatePath *msg;
2488 struct GNUNET_PeerIdentity *pi;
2492 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2493 msg->header.size = htons (size);
2494 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2495 msg->tid = htonl (t->id.tid);
2496 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2497 for (i = 0; i < p->length; i++)
2499 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2501 send_prebuilt_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2508 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
2510 * @param t Tunnel which to confirm.
2513 send_path_ack (struct MeshTunnel *t)
2515 struct MeshTransmissionDescriptor *info;
2516 struct GNUNET_PeerIdentity id;
2517 GNUNET_PEER_Id peer;
2519 peer = tree_get_predecessor (t->tree);
2520 GNUNET_PEER_resolve (peer, &id);
2521 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2522 info->origin = &t->id;
2523 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
2524 GNUNET_assert (NULL != info->peer);
2527 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2528 sizeof (struct GNUNET_MESH_PathACK),
2535 * Try to establish a new connection to this peer.
2536 * Use the best path for the given tunnel.
2537 * If the peer doesn't have any path to it yet, try to get one.
2538 * If the peer already has some path, send a CREATE PATH towards it.
2540 * @param peer PeerInfo of the peer.
2541 * @param t Tunnel for which to create the path, if possible.
2544 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2546 struct MeshPeerPath *p;
2547 struct MeshPathInfo *path_info;
2549 if (NULL != peer->path_head)
2551 p = tree_get_path_to_peer (t->tree, peer->id);
2558 // FIXME always send create path to self
2561 send_create_path (peer, p, t);
2565 struct GNUNET_HashCode hash;
2568 send_client_peer_connected (t, myid);
2569 t->local_tid_dest = next_local_tid++;
2570 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2573 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2574 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2581 else if (NULL == peer->dhtget)
2583 struct GNUNET_PeerIdentity id;
2585 GNUNET_PEER_resolve (peer->id, &id);
2586 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2587 path_info->peer = peer;
2589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2590 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2591 peer->dhtgetcls = path_info;
2592 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2593 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2594 &id.hashPubKey, /* key to search */
2595 dht_replication_level, /* replication level */
2596 GNUNET_DHT_RO_RECORD_ROUTE |
2597 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2598 NULL, /* xquery */ // FIXME BLOOMFILTER
2599 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2600 &dht_get_id_handler, path_info);
2602 /* Otherwise, there is no path but the DHT get is already started. */
2607 * Task to delay the connection of a peer
2609 * @param cls Closure (path info with tunnel and peer to connect).
2610 * Will be free'd on exection.
2611 * @param tc TaskContext
2614 peer_info_connect_task (void *cls,
2615 const struct GNUNET_SCHEDULER_TaskContext *tc)
2617 struct MeshPathInfo *path_info = cls;
2619 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2624 peer_info_connect (path_info->peer, path_info->t);
2630 * Destroy the peer_info and free any allocated resources linked to it
2632 * @param pi The peer_info to destroy.
2634 * @return GNUNET_OK on success
2637 peer_info_destroy (struct MeshPeerInfo *pi)
2639 struct GNUNET_PeerIdentity id;
2640 struct MeshPeerPath *p;
2641 struct MeshPeerPath *nextp;
2643 GNUNET_PEER_resolve (pi->id, &id);
2644 GNUNET_PEER_change_rc (pi->id, -1);
2647 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2650 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2651 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2653 if (NULL != pi->dhtget)
2655 GNUNET_DHT_get_stop (pi->dhtget);
2656 GNUNET_free (pi->dhtgetcls);
2662 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2672 * Remove all paths that rely on a direct connection between p1 and p2
2673 * from the peer itself and notify all tunnels about it.
2675 * @param peer PeerInfo of affected peer.
2676 * @param p1 GNUNET_PEER_Id of one peer.
2677 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2680 * TODO: optimize (see below)
2683 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2686 struct MeshPeerPath *p;
2687 struct MeshPeerPath *aux;
2688 struct MeshPeerInfo *peer_d;
2690 unsigned int destroyed;
2695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2697 p = peer->path_head;
2701 for (i = 0; i < (p->length - 1); i++)
2703 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2704 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2706 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2717 for (i = 0; i < peer->ntunnels; i++)
2719 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2723 * Problem: one or more peers have been deleted from the tunnel tree.
2724 * We don't know who they are to try to add them again.
2725 * We need to try to find a new path for each of the disconnected peers.
2726 * Some of them might already have a path to reach them that does not
2727 * involve p1 and p2. Adding all anew might render in a better tree than
2728 * the trivial immediate fix.
2730 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2731 * its children will be reachable trough him.
2733 peer_d = peer_info_get_short (d);
2736 for (p = peer_d->path_head; NULL != p; p = p->next)
2738 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2746 /* No callback, as peer will be already disconnected and a connection
2747 * scheduled by tunnel_notify_connection_broken.
2749 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2753 peer_info_connect (peer_d, peer->tunnels[i]);
2756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2761 * Add the path to the peer and update the path used to reach it in case this
2764 * @param peer_info Destination peer to add the path to.
2765 * @param path New path to add. Last peer must be the peer in arg 1.
2766 * Path will be either used of freed if already known.
2767 * @param trusted Do we trust that this path is real?
2770 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2773 struct MeshPeerPath *aux;
2777 if ((NULL == peer_info) || (NULL == path))
2780 path_destroy (path);
2783 if (path->peers[path->length - 1] != peer_info->id)
2786 path_destroy (path);
2789 if (path->length <= 2 && GNUNET_NO == trusted)
2791 /* Only allow CORE to tell us about direct paths */
2792 path_destroy (path);
2795 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2796 for (l = 1; l < path->length; l++)
2798 if (path->peers[l] == myid)
2800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2801 for (l2 = 0; l2 < path->length - l; l2++)
2803 path->peers[l2] = path->peers[l + l2];
2808 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2813 struct GNUNET_PeerIdentity id;
2815 GNUNET_PEER_resolve (peer_info->id, &id);
2816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2817 path->length, GNUNET_i2s (&id));
2820 l = path_get_length (path);
2827 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2828 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2830 l2 = path_get_length (aux);
2833 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2834 peer_info->path_tail, aux, path);
2839 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2841 path_destroy (path);
2846 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2853 * Add the path to the origin peer and update the path used to reach it in case
2854 * this is the shortest.
2855 * The path is given in peer_info -> destination, therefore we turn the path
2856 * upside down first.
2858 * @param peer_info Peer to add the path to, being the origin of the path.
2859 * @param path New path to add after being inversed.
2860 * @param trusted Do we trust that this path is real?
2863 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2864 struct MeshPeerPath *path, int trusted)
2867 peer_info_add_path (peer_info, path, trusted);
2872 * Function called if the connection to the peer has been stalled for a while,
2873 * possibly due to a missed ACK. Poll the peer about its ACK status.
2875 * @param cls Closure (info about regex search).
2876 * @param tc TaskContext.
2879 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2881 struct MeshTunnelChildInfo *cinfo = cls;
2882 struct GNUNET_MESH_Poll msg;
2883 struct GNUNET_PeerIdentity id;
2884 struct MeshTunnel *t;
2886 return; // FIXME fc activate
2887 cinfo->fc_poll = GNUNET_SCHEDULER_NO_TASK;
2888 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2894 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
2895 msg.header.size = htons (sizeof (msg));
2896 msg.tid = htonl (t->id.tid);
2897 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2898 msg.last_ack = htonl (cinfo->fwd_ack);
2900 GNUNET_PEER_resolve (tree_get_predecessor(cinfo->t->tree), &id);
2901 send_prebuilt_message (&msg.header, &id, cinfo->t);
2902 cinfo->fc_poll = GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_UNIT_SECONDS,
2903 &tunnel_poll, cinfo);
2908 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2909 * to obtain a local peer -> destination path and interning the peer ids.
2911 * @return Newly allocated and created path
2913 static struct MeshPeerPath *
2914 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2915 unsigned int get_path_length,
2916 const struct GNUNET_PeerIdentity *put_path,
2917 unsigned int put_path_length)
2919 struct MeshPeerPath *p;
2925 GNUNET_PEER_change_rc (myid, 1);
2926 i = get_path_length;
2927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2928 for (i--; i >= 0; i--)
2930 id = GNUNET_PEER_intern (&get_path[i]);
2931 if (p->length > 0 && id == p->peers[p->length - 1])
2933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2934 GNUNET_PEER_change_rc (id, -1);
2938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2939 GNUNET_i2s (&get_path[i]));
2941 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2942 p->peers[p->length - 1] = id;
2945 i = put_path_length;
2946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2947 for (i--; i >= 0; i--)
2949 id = GNUNET_PEER_intern (&put_path[i]);
2952 /* PUT path went through us, so discard the path up until now and start
2953 * from here to get a much shorter (and loop-free) path.
2958 if (p->length > 0 && id == p->peers[p->length - 1])
2960 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2961 GNUNET_PEER_change_rc (id, -1);
2965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2966 GNUNET_i2s (&put_path[i]));
2968 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2969 p->peers[p->length - 1] = id;
2973 if (get_path_length > 0)
2974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2975 GNUNET_i2s (&get_path[0]));
2976 if (put_path_length > 0)
2977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2978 GNUNET_i2s (&put_path[0]));
2979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2981 for (i = 0; i < p->length; i++)
2983 struct GNUNET_PeerIdentity peer_id;
2985 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2986 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2987 GNUNET_i2s (&peer_id));
2995 * Adds a path to the peer_infos of all the peers in the path
2997 * @param p Path to process.
2998 * @param confirmed Whether we know if the path works or not.
3001 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
3005 /* TODO: invert and add */
3006 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
3007 for (i++; i < p->length; i++)
3009 struct MeshPeerInfo *aux;
3010 struct MeshPeerPath *copy;
3012 aux = peer_info_get_short (p->peers[i]);
3013 copy = path_duplicate (p);
3014 copy->length = i + 1;
3015 peer_info_add_path (aux, copy, GNUNET_NO);
3021 * Send keepalive packets for a peer
3023 * @param cls Closure (tunnel for which to send the keepalive).
3024 * @param tc Notification context.
3026 * TODO: implement explicit multicast keepalive?
3029 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3033 * Search for a tunnel among the incoming tunnels
3035 * @param tid the local id of the tunnel
3037 * @return tunnel handler, NULL if doesn't exist
3039 static struct MeshTunnel *
3040 tunnel_get_incoming (MESH_TunnelNumber tid)
3042 struct GNUNET_HashCode hash;
3044 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
3045 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3046 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
3051 * Search for a tunnel among the tunnels for a client
3053 * @param c the client whose tunnels to search in
3054 * @param tid the local id of the tunnel
3056 * @return tunnel handler, NULL if doesn't exist
3058 static struct MeshTunnel *
3059 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
3061 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3063 return tunnel_get_incoming (tid);
3067 struct GNUNET_HashCode hash;
3069 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3070 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
3076 * Search for a tunnel by global ID using PEER_ID
3078 * @param pi owner of the tunnel
3079 * @param tid global tunnel number
3081 * @return tunnel handler, NULL if doesn't exist
3083 static struct MeshTunnel *
3084 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
3086 struct MESH_TunnelID id;
3087 struct GNUNET_HashCode hash;
3092 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
3093 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
3098 * Search for a tunnel by global ID using full PeerIdentities
3100 * @param oid owner of the tunnel
3101 * @param tid global tunnel number
3103 * @return tunnel handler, NULL if doesn't exist
3105 static struct MeshTunnel *
3106 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
3108 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
3113 * Delete an active client from the tunnel.
3119 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
3123 for (i = 0; i < t->nclients; i++)
3125 if (t->clients[i] == c)
3127 t->clients[i] = t->clients[t->nclients - 1];
3128 t->clients_fc[i] = t->clients_fc[t->nclients - 1];
3129 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
3131 GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
3139 * Delete an ignored client from the tunnel.
3145 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
3149 for (i = 0; i < t->nignore; i++)
3151 if (t->ignore[i] == c)
3153 t->ignore[i] = t->ignore[t->nignore - 1];
3154 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
3162 * Delete a client from the tunnel. It should be only done on
3163 * client disconnection, otherwise use client_ignore_tunnel.
3169 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
3171 tunnel_delete_ignored_client (t, c);
3172 tunnel_delete_active_client (t, c);
3177 * @brief Iterator to destroy MeshTunnelChildInfo of tunnel children.
3179 * Destroys queue elements of all waiting transmissions and frees all memory
3180 * used by the struct and its elements.
3182 * @param cls Closure (tunnel info).
3183 * @param key Hash of GNUNET_PEER_Id (unused).
3184 * @param value MeshTunnelChildInfo of the child.
3186 * @return always GNUNET_YES, to keep iterating
3189 tunnel_destroy_child (void *cls,
3190 const struct GNUNET_HashCode * key,
3193 struct MeshTunnelChildInfo *cinfo = value;
3194 struct MeshTunnel *t = cls;
3198 for (c = 0; c < cinfo->send_buffer_n; c++)
3200 i = (cinfo->send_buffer_start + c) % t->fwd_queue_max;
3201 if (NULL != cinfo->send_buffer[i])
3202 queue_destroy (cinfo->send_buffer[i], GNUNET_YES);
3205 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "%u %u\n", c, cinfo->send_buffer_n);
3207 GNUNET_free_non_null (cinfo->send_buffer);
3208 GNUNET_free (cinfo);
3214 * Callback used to notify a client owner of a tunnel that a peer has
3215 * disconnected, most likely because of a path change.
3217 * @param cls Closure (tunnel this notification is about).
3218 * @param peer_id Short ID of disconnected peer.
3221 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
3223 struct MeshTunnel *t = cls;
3224 struct MeshPeerInfo *peer;
3225 struct MeshPathInfo *path_info;
3227 if (NULL != t->owner && NULL != nc)
3229 struct GNUNET_MESH_PeerControl msg;
3231 msg.header.size = htons (sizeof (msg));
3232 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
3233 msg.tunnel_id = htonl (t->local_tid);
3234 GNUNET_PEER_resolve (peer_id, &msg.peer);
3235 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3236 &msg.header, GNUNET_NO);
3238 peer = peer_info_get_short (peer_id);
3239 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
3240 path_info->peer = peer;
3242 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
3247 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
3248 * needed rescources.
3249 * If peer already exists, reevaluate shortest path and change if different.
3251 * @param t Tunnel we want to add a new peer to
3252 * @param peer PeerInfo of the peer being added
3256 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
3258 struct GNUNET_PeerIdentity id;
3259 struct MeshPeerPath *best_p;
3260 struct MeshPeerPath *p;
3261 unsigned int best_cost;
3264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
3265 GNUNET_PEER_resolve (peer->id, &id);
3267 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
3270 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
3271 GNUNET_assert (GNUNET_OK ==
3272 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
3274 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3277 if (NULL != (p = peer->path_head))
3280 best_cost = tree_get_path_cost (t->tree, p);
3283 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
3290 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
3291 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
3292 t->path_refresh_task =
3293 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3297 /* Start a DHT get */
3298 peer_info_connect (peer, t);
3300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3304 * Add a path to a tunnel which we don't own, just to remember the next hop.
3305 * If destination node was already in the tunnel, the first hop information
3306 * will be replaced with the new path.
3308 * @param t Tunnel we want to add a new peer to
3309 * @param p Path to add
3310 * @param own_pos Position of local node in path.
3314 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3315 unsigned int own_pos)
3317 struct GNUNET_PeerIdentity id;
3319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3320 GNUNET_assert (0 != own_pos);
3321 tree_add_path (t->tree, p, NULL, NULL);
3322 if (own_pos < p->length - 1)
3324 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3325 tree_update_first_hops (t->tree, myid, &id);
3327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3331 * Add a client to a tunnel, initializing all needed data structures.
3333 * @param t Tunnel to which add the client.
3334 * @param c Client which to add to the tunnel.
3337 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
3339 struct MeshTunnelClientInfo clinfo;
3341 GNUNET_array_append (t->clients, t->nclients, c);
3342 clinfo.fwd_ack = t->fwd_pid + 1;
3343 clinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
3344 clinfo.fwd_pid = t->fwd_pid;
3345 clinfo.bck_pid = (uint32_t) -1; // Expected next: 0
3347 GNUNET_array_append (t->clients_fc, t->nclients, clinfo);
3352 * Notifies a tunnel that a connection has broken that affects at least
3353 * some of its peers. Sends a notification towards the root of the tree.
3354 * In case the peer is the owner of the tree, notifies the client that owns
3355 * the tunnel and tries to reconnect.
3357 * @param t Tunnel affected.
3358 * @param p1 Peer that got disconnected from p2.
3359 * @param p2 Peer that got disconnected from p1.
3361 * @return Short ID of the peer disconnected (either p1 or p2).
3362 * 0 if the tunnel remained unaffected.
3364 static GNUNET_PEER_Id
3365 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3371 tree_notify_connection_broken (t->tree, p1, p2,
3372 &tunnel_notify_client_peer_disconnected,
3374 if (myid != p1 && myid != p2)
3380 if (tree_get_predecessor (t->tree) != 0)
3382 /* We are the peer still connected, notify owner of the disconnection. */
3383 struct GNUNET_MESH_PathBroken msg;
3384 struct GNUNET_PeerIdentity neighbor;
3386 msg.header.size = htons (sizeof (msg));
3387 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3388 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3389 msg.tid = htonl (t->id.tid);
3390 msg.peer1 = my_full_id;
3391 GNUNET_PEER_resolve (pid, &msg.peer2);
3392 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3393 send_prebuilt_message (&msg.header, &neighbor, t);
3401 * Send a multicast packet to a neighbor.
3403 * @param cls Closure (Info about the multicast packet)
3404 * @param neighbor_id Short ID of the neighbor to send the packet to.
3407 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3409 struct MeshData *mdata = cls;
3410 struct MeshTransmissionDescriptor *info;
3411 struct GNUNET_PeerIdentity neighbor;
3412 struct GNUNET_MessageHeader *msg;
3414 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3416 info->mesh_data = mdata;
3417 (mdata->reference_counter) ++;
3418 info->destination = neighbor_id;
3419 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3421 GNUNET_i2s (&neighbor));
3422 info->peer = peer_info_get (&neighbor);
3423 GNUNET_assert (NULL != info->peer);
3424 msg = (struct GNUNET_MessageHeader *) mdata->data;
3427 info->mesh_data->data_len,
3434 * Queue a message in a tunnel in multicast, sending a copy to each child node
3435 * down the local one in the tunnel tree.
3437 * @param t Tunnel in which to send the data.
3438 * @param msg Message to be sent.
3441 tunnel_send_multicast (struct MeshTunnel *t,
3442 const struct GNUNET_MessageHeader *msg)
3444 struct MeshData *mdata;
3446 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3447 " sending a multicast packet...\n");
3449 mdata = GNUNET_malloc (sizeof (struct MeshData));
3450 mdata->data_len = ntohs (msg->size);
3452 mdata->data = GNUNET_malloc (mdata->data_len);
3453 memcpy (mdata->data, msg, mdata->data_len);
3454 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3456 struct GNUNET_MESH_Multicast *mcast;
3458 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3459 if (t->fwd_queue_n >= t->fwd_queue_max)
3462 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " queue full!\n");
3463 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3464 " message from %s!\n",
3465 GNUNET_i2s(&mcast->oid));
3466 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3467 " message at %s!\n",
3468 GNUNET_i2s(&my_full_id));
3469 GNUNET_free (mdata->data);
3470 GNUNET_free (mdata);
3474 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3476 ntohl (mcast->ttl));
3480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3483 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3484 if (mdata->reference_counter == 0)
3486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3487 " no one to send data to\n");
3488 GNUNET_free (mdata->data);
3489 GNUNET_free (mdata);
3494 mdata->total_out = mdata->reference_counter;
3496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3497 " sending a multicast packet done\n");
3503 * Increase the SKIP value of all peers that
3504 * have not received a unicast message.
3506 * @param cls Closure (ID of the peer that HAS received the message).
3507 * @param key ID of the neighbor.
3508 * @param value Information about the neighbor.
3510 * @return GNUNET_YES to keep iterating.
3513 tunnel_add_skip (void *cls,
3514 const struct GNUNET_HashCode * key,
3517 struct GNUNET_PeerIdentity *neighbor = cls;
3518 struct MeshTunnelChildInfo *cinfo = value;
3520 /* TODO compare only pointers? key == neighbor? */
3521 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3531 * @brief Get neighbor's Flow Control information.
3533 * Retrieves the MeshTunnelChildInfo containing Flow Control data about a direct
3534 * descendant of the local node in a certain tunnel.
3535 * If the info is not yet there (recently created path), creates the data struct
3536 * and inserts it into the tunnel info, initialized to the current tunnel ACK
3539 * @param t Tunnel related.
3540 * @param peer Neighbor whose Flow Control info is needed.
3542 * @return Neighbor's Flow Control info.
3544 static struct MeshTunnelChildInfo *
3545 tunnel_get_neighbor_fc (struct MeshTunnel *t,
3546 const struct GNUNET_PeerIdentity *peer)
3548 struct MeshTunnelChildInfo *cinfo;
3550 if (NULL == t->children_fc)
3553 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3559 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3560 cinfo->id = GNUNET_PEER_intern (peer);
3561 cinfo->skip = t->fwd_pid;
3564 delta = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3565 cinfo->fwd_ack = t->fwd_pid + delta;
3566 cinfo->bck_ack = delta;
3568 cinfo->send_buffer =
3569 GNUNET_malloc (sizeof(struct MeshPeerQueue *) * t->fwd_queue_max);
3571 GNUNET_assert (GNUNET_OK ==
3572 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
3575 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3582 * Get the Flow Control info of a client.
3584 * @param t Tunnel on which to look.
3585 * @param c Client whose ACK to get.
3587 * @return ACK value.
3589 static struct MeshTunnelClientInfo *
3590 tunnel_get_client_fc (struct MeshTunnel *t,
3591 struct MeshClient *c)
3595 for (i = 0; i < t->nclients; i++)
3597 if (t->clients[i] != c)
3599 return &t->clients_fc[i];
3602 return NULL; // avoid compiler / coverity complaints
3607 * Iterator to get the appropiate ACK value from all children nodes.
3609 * @param cls Closue (tunnel).
3610 * @param id Id of the child node.
3613 tunnel_get_child_fwd_ack (void *cls,
3616 struct GNUNET_PeerIdentity peer_id;
3617 struct MeshTunnelChildInfo *cinfo;
3618 struct MeshTunnelChildIteratorContext *ctx = cls;
3619 struct MeshTunnel *t = ctx->t;
3622 GNUNET_PEER_resolve (id, &peer_id);
3623 cinfo = tunnel_get_neighbor_fc (t, &peer_id);
3624 ack = cinfo->fwd_ack;
3627 if (GNUNET_NO == ctx->init)
3629 ctx->max_child_ack = ack;
3630 ctx->init = GNUNET_YES;
3633 if (GNUNET_YES == t->speed_min)
3635 ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
3639 ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
3646 * Get the maximum PID allowed to transmit to any
3647 * tunnel child of the local peer, depending on the tunnel
3648 * buffering/speed settings.
3652 * @return Maximum PID allowed (uint32 MAX), -1LL if node has no children.
3655 tunnel_get_children_fwd_ack (struct MeshTunnel *t)
3657 struct MeshTunnelChildIteratorContext ctx;
3659 ctx.max_child_ack = 0;
3661 ctx.init = GNUNET_NO;
3662 tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
3664 if (0 == ctx.nchildren)
3666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3667 " tunnel has no children, no FWD ACK\n");
3671 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
3672 ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
3674 return (int64_t) ctx.max_child_ack;
3679 * Set the FWD ACK value of a client in a particular tunnel.
3681 * @param t Tunnel affected.
3682 * @param c Client whose ACK to set.
3683 * @param ack ACK value.
3686 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
3687 struct MeshClient *c,
3692 for (i = 0; i < t->nclients; i++)
3694 if (t->clients[i] != c)
3696 t->clients_fc[i].fwd_ack = ack;
3704 * Get the highest ACK value of all clients in a particular tunnel,
3705 * according to the buffering/speed settings.
3707 * @param t Tunnel on which to look.
3709 * @return Corresponding ACK value (max uint32_t).
3710 * If no clients are suscribed, -1LL.
3713 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
3718 if (0 == t->nclients)
3720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3721 " tunnel has no clients, no FWD ACK\n");
3725 for (ack = -1LL, i = 0; i < t->nclients; i++)
3728 (GNUNET_YES == t->speed_min &&
3729 GNUNET_YES == GMC_is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
3730 (GNUNET_NO == t->speed_min &&
3731 GNUNET_YES == GMC_is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
3733 ack = t->clients_fc[i].fwd_ack;
3737 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
3738 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
3740 return (uint32_t) ack;
3745 * Get the current fwd ack value for a tunnel, taking in account the tunnel
3746 * mode and the status of all children nodes.
3750 * @return Maximum PID allowed.
3753 tunnel_get_fwd_ack (struct MeshTunnel *t)
3757 uint32_t buffer_free;
3761 count = t->fwd_pid - t->skip;
3762 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
3763 child_ack = tunnel_get_children_fwd_ack (t);
3764 client_ack = tunnel_get_clients_fwd_ack (t);
3765 if (GNUNET_YES == t->nobuffer)
3768 if (-1LL == child_ack)
3769 child_ack = client_ack;
3770 if (-1LL == child_ack)
3773 client_ack = child_ack = ack;
3778 ack = count + buffer_free; // Overflow? OK!
3780 if (-1LL == child_ack)
3782 // Node has no children, child_ack AND core buffer are irrelevant.
3783 GNUNET_break (-1LL != client_ack); // No children AND no clients? Not good!
3784 return (uint32_t) client_ack;
3786 if (-1LL == client_ack)
3790 if (GNUNET_YES == t->speed_min)
3792 ack = GMC_min_pid ((uint32_t) child_ack, ack);
3793 ack = GMC_min_pid ((uint32_t) client_ack, ack);
3797 ack = GMC_max_pid ((uint32_t) child_ack, ack);
3798 ack = GMC_max_pid ((uint32_t) client_ack, ack);
3800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3801 "c %u, bf %u, ch %lld, cl %lld, ACK: %u\n",
3802 count, buffer_free, child_ack, client_ack, ack);
3808 * Build a local ACK message and send it to a local client.
3810 * @param t Tunnel on which to send the ACK.
3811 * @param c Client to whom send the ACK.
3812 * @param ack Value of the ACK.
3815 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
3817 struct GNUNET_MESH_LocalAck msg;
3819 msg.header.size = htons (sizeof (msg));
3820 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
3821 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
3822 msg.max_pid = htonl (ack);
3823 GNUNET_SERVER_notification_context_unicast(nc,
3830 * Build an ACK message and queue it to send to the given peer.
3832 * @param t Tunnel on which to send the ACK.
3833 * @param peer Peer to whom send the ACK.
3834 * @param ack Value of the ACK.
3837 send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
3839 struct GNUNET_MESH_ACK msg;
3841 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3842 msg.header.size = htons (sizeof (msg));
3843 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3844 msg.pid = htonl (ack);
3845 msg.tid = htonl (t->id.tid);
3847 send_prebuilt_message (&msg.header, peer, t);
3852 * Notify a the owner of a tunnel about how many more
3853 * payload packages will we accept on a given tunnel.
3855 * @param t Tunnel on which to send the ACK.
3858 tunnel_send_client_fwd_ack (struct MeshTunnel *t)
3862 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3863 "Sending client FWD ACK on tunnel %X\n",
3866 ack = tunnel_get_fwd_ack (t);
3868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
3869 if (t->last_fwd_ack == ack)
3871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " same as last, not sending!\n");
3875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
3876 t->last_fwd_ack = ack;
3877 send_local_ack (t, t->owner, ack);
3882 * Send an ACK informing the predecessor about the available buffer space.
3883 * In case there is no predecessor, inform the owning client.
3884 * If buffering is off, send only on behalf of children or self if endpoint.
3885 * If buffering is on, send when sent to children and buffer space is free.
3886 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
3887 * the ACK itself goes "back" (towards root).
3889 * @param t Tunnel on which to send the ACK.
3890 * @param type Type of message that triggered the ACK transmission.
3893 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
3895 struct GNUNET_PeerIdentity id;
3898 if (NULL != t->owner)
3900 tunnel_send_client_fwd_ack (t);
3903 /* Is it after unicast / multicast retransmission? */
3906 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3907 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3909 "ACK due to FWD DATA retransmission\n");
3910 if (GNUNET_YES == t->nobuffer)
3912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3916 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3917 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3923 /* Check if we need no retransmit the ACK */
3924 if (t->fwd_queue_max > t->fwd_queue_n * 4 &&
3925 GMC_is_pid_bigger(t->last_fwd_ack, t->fwd_pid))
3927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3929 " t->qmax: %u, t->qn: %u\n",
3930 t->fwd_queue_max, t->fwd_queue_n);
3931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3932 " t->pid: %u, t->ack: %u\n",
3933 t->fwd_pid, t->last_fwd_ack);
3937 /* Ok, ACK might be necessary, what PID to ACK? */
3938 ack = tunnel_get_fwd_ack (t);
3940 /* If speed_min and not all children have ack'd, dont send yet */
3941 if (ack == t->last_fwd_ack)
3943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
3947 t->last_fwd_ack = ack;
3948 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3949 send_ack (t, &id, ack);
3955 * Iterator to send a child node a BCK ACK to allow him to send more
3958 * @param cls Closure (tunnel).
3959 * @param id Id of the child node.
3962 tunnel_send_child_bck_ack (void *cls,
3965 struct MeshTunnel *t = cls;
3966 struct MeshTunnelChildInfo *cinfo;
3967 struct GNUNET_PeerIdentity peer;
3969 GNUNET_PEER_resolve (id, &peer);
3970 cinfo = tunnel_get_neighbor_fc (t, &peer);
3972 if (cinfo->bck_ack != cinfo->pid &&
3973 GNUNET_NO == GMC_is_pid_bigger (cinfo->bck_ack, cinfo->pid))
3976 cinfo->bck_ack++; // FIXME window size?
3977 send_ack (t, &peer, cinfo->bck_ack);
3982 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
3984 * Iterates over all clients and sends BCK ACKs to the ones that need it.
3986 * @param t Tunnel on which to send the BCK ACKs.
3989 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
3992 unsigned int tunnel_delta;
3994 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Sending BCK ACK to clients\n");
3996 tunnel_delta = t->bck_ack - t->bck_pid;
3997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " tunnel delta: %u\n", tunnel_delta);
3999 /* Find client whom to allow to send to origin (with lowest buffer space) */
4000 for (i = 0; i < t->nclients; i++)
4002 struct MeshTunnelClientInfo *clinfo;
4005 clinfo = &t->clients_fc[i];
4006 delta = clinfo->bck_ack - clinfo->bck_pid;
4007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u delta: %u\n",
4008 t->clients[i]->id, delta);
4010 if ((GNUNET_NO == t->nobuffer && tunnel_delta > delta) ||
4011 (GNUNET_YES == t->nobuffer && 0 == delta))
4015 ack = clinfo->bck_pid;
4016 ack += t->nobuffer ? 1 : tunnel_delta;
4017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4018 " sending ack to client %u: %u\n",
4019 t->clients[i]->id, ack);
4020 send_local_ack (t, t->clients[i], ack);
4021 clinfo->bck_ack = ack;
4028 * Send an ACK informing the children nodes and destination clients about
4029 * the available buffer space.
4030 * If buffering is off, send only on behalf of root (can be self).
4031 * If buffering is on, send when sent to predecessor and buffer space is free.
4032 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
4033 * the ACK itself goes "forward" (towards children/clients).
4035 * @param t Tunnel on which to send the ACK.
4036 * @param type Type of message that triggered the ACK transmission.
4039 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
4041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4042 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
4043 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
4044 /* Is it after data to_origin retransmission? */
4047 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4048 if (GNUNET_YES == t->nobuffer)
4050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4051 " Not sending ACK, nobuffer\n");
4055 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4056 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
4057 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4063 tunnel_send_clients_bck_ack (t);
4064 tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, t);
4069 * @brief Re-initiate traffic to this peer if necessary.
4071 * Check if there is traffic queued towards this peer
4072 * and the core transmit handle is NULL (traffic was stalled).
4073 * If so, call core tmt rdy.
4075 * @param cls Closure (unused)
4076 * @param peer_id Short ID of peer to which initiate traffic.
4079 peer_unlock_queue(void *cls, GNUNET_PEER_Id peer_id)
4081 struct MeshPeerInfo *peer;
4082 struct GNUNET_PeerIdentity id;
4083 struct MeshPeerQueue *q;
4086 peer = peer_info_get_short(peer_id);
4087 if (NULL != peer->core_transmit)
4090 q = queue_get_next(peer);
4093 /* Might br multicast traffic already sent to this particular peer but
4094 * not to other children in this tunnel.
4095 * This way t->queue_n would be > 0 but the queue of this particular peer
4101 GNUNET_PEER_resolve (peer->id, &id);
4102 peer->core_transmit =
4103 GNUNET_CORE_notify_transmit_ready(core_handle,
4106 GNUNET_TIME_UNIT_FOREVER_REL,
4116 * @brief Allow transmission of FWD traffic on this tunnel
4118 * Check if there is traffic queued towards any children
4119 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4121 * @param t Tunnel on which to unlock FWD traffic.
4124 tunnel_unlock_fwd_queues (struct MeshTunnel *t)
4126 if (0 == t->fwd_queue_n)
4129 tree_iterate_children (t->tree, &peer_unlock_queue, NULL);
4134 * @brief Allow transmission of BCK traffic on this tunnel
4136 * Check if there is traffic queued towards the root of the tree
4137 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4139 * @param t Tunnel on which to unlock BCK traffic.
4142 tunnel_unlock_bck_queue (struct MeshTunnel *t)
4144 if (0 == t->bck_queue_n)
4147 peer_unlock_queue(NULL, tree_get_predecessor(t->tree));
4152 * Send a message to all peers in this tunnel that the tunnel is no longer
4155 * @param t The tunnel whose peers to notify.
4158 tunnel_send_destroy (struct MeshTunnel *t)
4160 struct GNUNET_MESH_TunnelDestroy msg;
4162 msg.header.size = htons (sizeof (msg));
4163 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
4164 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
4165 msg.tid = htonl (t->id.tid);
4166 tunnel_send_multicast (t, &msg.header);
4171 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
4173 * @param cls Closure (Tunnel which to cancel).
4174 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
4177 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
4179 struct MeshTunnel *t = cls;
4180 struct MeshPeerInfo *peer_info;
4181 struct MeshPeerQueue *pq;
4182 struct MeshPeerQueue *next;
4184 peer_info = peer_info_get_short (neighbor_id);
4185 for (pq = peer_info->queue_head; NULL != pq; pq = next)
4188 if (pq->tunnel == t)
4190 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST == pq->type ||
4191 GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
4192 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
4194 // Should have been removed on destroy children
4197 queue_destroy (pq, GNUNET_YES);
4200 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
4202 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
4203 peer_info->core_transmit = NULL;
4208 * Destroy the tunnel and free any allocated resources linked to it.
4210 * @param t the tunnel to destroy
4212 * @return GNUNET_OK on success
4215 tunnel_destroy (struct MeshTunnel *t)
4217 struct MeshClient *c;
4218 struct GNUNET_HashCode hash;
4229 struct GNUNET_PeerIdentity id;
4231 GNUNET_PEER_resolve (t->id.oid, &id);
4232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
4233 GNUNET_i2s (&id), t->id.tid);
4235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4239 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4240 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
4248 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4250 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
4257 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4258 for (i = 0; i < t->nclients; i++)
4262 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
4268 for (i = 0; i < t->nignore; i++)
4272 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
4279 if (t->nclients > 0)
4282 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
4287 GNUNET_free (t->clients);
4288 GNUNET_free (t->clients_fc);
4291 if (NULL != t->peers)
4293 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
4295 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
4298 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4299 &tunnel_destroy_child,
4301 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
4302 t->children_fc = NULL;
4304 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
4305 tree_destroy (t->tree);
4307 if (NULL != t->regex_ctx)
4308 regex_cancel_search (t->regex_ctx);
4309 if (NULL != t->dht_get_type)
4310 GNUNET_DHT_get_stop (t->dht_get_type);
4311 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4312 GNUNET_SCHEDULER_cancel (t->timeout_task);
4313 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
4314 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
4317 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
4324 * Create a new tunnel
4326 * @param owner Who is the owner of the tunnel (short ID).
4327 * @param tid Tunnel Number of the tunnel.
4328 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
4329 * @param local Tunnel Number for the tunnel, for the client point of view.
4331 * @return A new initialized tunnel. NULL on error.
4333 static struct MeshTunnel *
4334 tunnel_new (GNUNET_PEER_Id owner,
4335 MESH_TunnelNumber tid,
4336 struct MeshClient *client,
4337 MESH_TunnelNumber local)
4339 struct MeshTunnel *t;
4340 struct GNUNET_HashCode hash;
4342 if (n_tunnels >= max_tunnels && NULL == client)
4345 t = GNUNET_malloc (sizeof (struct MeshTunnel));
4348 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
4349 t->bck_queue_max = t->fwd_queue_max;
4350 t->tree = tree_new (owner);
4352 t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
4353 t->bck_pid = (uint32_t) -1; // Next (expected) = 0
4354 t->bck_ack = INITIAL_WINDOW_SIZE - 1;
4355 t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
4356 t->local_tid = local;
4357 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
4359 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
4361 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4363 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
4364 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4371 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4378 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4380 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
4381 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4385 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4395 * Removes an explicit path from a tunnel, freeing all intermediate nodes
4396 * that are no longer needed, as well as nodes of no longer reachable peers.
4397 * The tunnel itself is also destoyed if results in a remote empty tunnel.
4399 * @param t Tunnel from which to remove the path.
4400 * @param peer Short id of the peer which should be removed.
4403 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
4405 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
4411 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
4412 * client when the client disconnects. If the client is not the owner, the
4413 * owner will get notified if no more clients are in the tunnel and the client
4414 * get removed from the tunnel's list.
4416 * @param cls closure (client that is disconnecting)
4417 * @param key the hash of the local tunnel id (used to access the hashmap)
4418 * @param value the value stored at the key (tunnel to destroy)
4420 * @return GNUNET_OK, keep iterating.
4423 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
4425 struct MeshTunnel *t = value;
4426 struct MeshClient *c = cls;
4428 send_client_tunnel_disconnect(t, c);
4431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4432 "Client %u is destination, keeping the tunnel alive.\n", c->id);
4433 tunnel_delete_client(t, c);
4434 client_delete_tunnel(c, t);
4437 tunnel_send_destroy(t);
4439 t->destroy = GNUNET_YES;
4446 * Timeout function, destroys tunnel if called
4448 * @param cls Closure (tunnel to destroy).
4449 * @param tc TaskContext
4452 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4454 struct MeshTunnel *t = cls;
4455 struct GNUNET_PeerIdentity id;
4457 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4458 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4460 GNUNET_PEER_resolve(t->id.oid, &id);
4461 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4462 "Tunnel %s [%X] timed out. Destroying.\n",
4463 GNUNET_i2s(&id), t->id.tid);
4464 send_clients_tunnel_destroy (t);
4469 * Resets the tunnel timeout. Starts it if no timeout was running.
4471 * @param t Tunnel whose timeout to reset.
4473 * TODO use heap to improve efficiency of scheduler.
4476 tunnel_reset_timeout (struct MeshTunnel *t)
4478 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4479 GNUNET_SCHEDULER_cancel (t->timeout_task);
4481 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
4482 (refresh_path_time, 4), &tunnel_timeout, t);
4486 /******************************************************************************/
4487 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4488 /******************************************************************************/
4491 * Function to send a create path packet to a peer.
4493 * @param cls closure
4494 * @param size number of bytes available in buf
4495 * @param buf where the callee should write the message
4496 * @return number of bytes written to buf
4499 send_core_path_create (void *cls, size_t size, void *buf)
4501 struct MeshPathInfo *info = cls;
4502 struct GNUNET_MESH_ManipulatePath *msg;
4503 struct GNUNET_PeerIdentity *peer_ptr;
4504 struct MeshTunnel *t = info->t;
4505 struct MeshPeerPath *p = info->path;
4510 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
4512 sizeof (struct GNUNET_MESH_ManipulatePath) +
4513 p->length * sizeof (struct GNUNET_PeerIdentity);
4515 if (size < size_needed || NULL == buf)
4520 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
4521 msg->header.size = htons (size_needed);
4522 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
4523 msg->tid = ntohl (t->id.tid);
4526 if (GNUNET_YES == t->speed_min)
4527 opt |= MESH_TUNNEL_OPT_SPEED_MIN;
4528 if (GNUNET_YES == t->nobuffer)
4529 opt |= MESH_TUNNEL_OPT_NOBUFFER;
4530 msg->opt = htonl(opt);
4533 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
4534 for (i = 0; i < p->length; i++)
4536 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
4542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4543 "CREATE PATH (%u bytes long) sent!\n", size_needed);
4549 * Fill the core buffer
4551 * @param cls closure (data itself)
4552 * @param size number of bytes available in buf
4553 * @param buf where the callee should write the message
4555 * @return number of bytes written to buf
4558 send_core_data_multicast (void *cls, size_t size, void *buf)
4560 struct MeshTransmissionDescriptor *info = cls;
4563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
4564 GNUNET_assert (NULL != info);
4565 GNUNET_assert (NULL != info->peer);
4566 total_size = info->mesh_data->data_len;
4567 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
4569 if (total_size > size)
4574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
4575 memcpy (buf, info->mesh_data->data, total_size);
4578 struct GNUNET_MESH_Multicast *mc;
4579 struct GNUNET_MessageHeader *mh;
4582 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
4584 mc = (struct GNUNET_MESH_Multicast *) mh;
4585 mh = (struct GNUNET_MessageHeader *) &mc[1];
4586 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4587 " multicast, payload type %s\n",
4588 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4590 " multicast, payload size %u\n", ntohs (mh->size));
4594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %s\n",
4595 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4599 data_descriptor_decrement_rc (info->mesh_data);
4600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
4602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
4608 * Creates a path ack message in buf and frees all unused resources.
4610 * @param cls closure (MeshTransmissionDescriptor)
4611 * @param size number of bytes available in buf
4612 * @param buf where the callee should write the message
4613 * @return number of bytes written to buf
4616 send_core_path_ack (void *cls, size_t size, void *buf)
4618 struct MeshTransmissionDescriptor *info = cls;
4619 struct GNUNET_MESH_PathACK *msg = buf;
4621 GNUNET_assert (NULL != info);
4622 if (sizeof (struct GNUNET_MESH_PathACK) > size)
4627 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
4628 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
4629 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
4630 msg->tid = htonl (info->origin->tid);
4631 msg->peer_id = my_full_id;
4634 /* TODO add signature */
4636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
4637 return sizeof (struct GNUNET_MESH_PathACK);
4642 * Free a transmission that was already queued with all resources
4643 * associated to the request.
4645 * @param queue Queue handler to cancel.
4646 * @param clear_cls Is it necessary to free associated cls?
4649 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4651 struct MeshTransmissionDescriptor *dd;
4652 struct MeshPathInfo *path_info;
4653 struct MeshTunnelChildInfo *cinfo;
4654 struct GNUNET_PeerIdentity id;
4658 if (GNUNET_YES == clear_cls)
4660 switch (queue->type)
4662 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
4663 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " cancelling TUNNEL_DESTROY\n");
4665 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4666 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4667 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4668 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
4669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4670 " prebuilt message\n");
4671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4673 GNUNET_MESH_DEBUG_M2S(queue->type));
4675 data_descriptor_decrement_rc (dd->mesh_data);
4677 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
4679 path_info = queue->cls;
4680 path_destroy (path_info->path);
4684 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4685 " type %s unknown!\n",
4686 GNUNET_MESH_DEBUG_M2S(queue->type));
4688 GNUNET_free_non_null (queue->cls);
4690 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
4691 queue->peer->queue_tail,
4694 /* Delete from child_fc in the appropiate tunnel */
4695 max = queue->tunnel->fwd_queue_max;
4696 GNUNET_PEER_resolve (queue->peer->id, &id);
4697 cinfo = tunnel_get_neighbor_fc (queue->tunnel, &id);
4700 for (i = 0; i < cinfo->send_buffer_n; i++)
4703 i2 = (cinfo->send_buffer_start + i) % max;
4704 if (cinfo->send_buffer[i2] == queue)
4706 /* Found corresponding entry in the send_buffer. Move all others back. */
4711 for (j = i, j2 = 0, j3 = 0; j < cinfo->send_buffer_n - 1; j++)
4713 j2 = (cinfo->send_buffer_start + j) % max;
4714 j3 = (cinfo->send_buffer_start + j + 1) % max;
4715 cinfo->send_buffer[j2] = cinfo->send_buffer[j3];
4718 cinfo->send_buffer[j3] = NULL;
4719 cinfo->send_buffer_n--;
4724 GNUNET_free (queue);
4729 * @brief Get the next transmittable message from the queue.
4731 * This will be the head, except in the case of being a data packet
4732 * not allowed by the destination peer.
4734 * @param peer Destination peer.
4736 * @return The next viable MeshPeerQueue element to send to that peer.
4737 * NULL when there are no transmittable messages.
4739 struct MeshPeerQueue *
4740 queue_get_next (const struct MeshPeerInfo *peer)
4742 struct MeshPeerQueue *q;
4743 struct MeshTunnel *t;
4744 struct MeshTransmissionDescriptor *info;
4745 struct MeshTunnelChildInfo *cinfo;
4746 struct GNUNET_MESH_Unicast *ucast;
4747 struct GNUNET_MESH_ToOrigin *to_orig;
4748 struct GNUNET_MESH_Multicast *mcast;
4749 struct GNUNET_PeerIdentity id;
4753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
4754 for (q = peer->queue_head; NULL != q; q = q->next)
4758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4760 GNUNET_MESH_DEBUG_M2S(q->type));
4763 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4764 ucast = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
4765 pid = ntohl (ucast->pid);
4766 GNUNET_PEER_resolve (info->peer->id, &id);
4767 cinfo = tunnel_get_neighbor_fc(t, &id);
4768 ack = cinfo->fwd_ack;
4770 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4771 to_orig = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
4772 pid = ntohl (to_orig->pid);
4775 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4776 mcast = (struct GNUNET_MESH_Multicast *) info->mesh_data->data;
4777 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST != ntohs(mcast->header.type))
4779 // Not a multicast payload: multicast control traffic (destroy, etc)
4782 pid = ntohl (mcast->pid);
4783 GNUNET_PEER_resolve (info->peer->id, &id);
4784 cinfo = tunnel_get_neighbor_fc(t, &id);
4785 ack = cinfo->fwd_ack;
4788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4792 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4793 "********* ACK: %u, PID: %u\n",
4795 if (GNUNET_NO == GMC_is_pid_bigger(pid, ack))
4797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4804 "********* NEXT!\n");
4807 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4808 "********* nothing found\n");
4814 * Core callback to write a queued packet to core buffer
4816 * @param cls Closure (peer info).
4817 * @param size Number of bytes available in buf.
4818 * @param buf Where the to write the message.
4820 * @return number of bytes written to buf
4823 queue_send (void *cls, size_t size, void *buf)
4825 struct MeshPeerInfo *peer = cls;
4826 struct GNUNET_MessageHeader *msg;
4827 struct MeshPeerQueue *queue;
4828 struct MeshTunnel *t;
4829 struct MeshTunnelChildInfo *cinfo;
4830 struct GNUNET_PeerIdentity dst_id;
4833 peer->core_transmit = NULL;
4836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
4837 queue = queue_get_next (peer);
4839 /* Queue has no internal mesh traffic nor sendable payload */
4842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
4843 if (NULL == peer->queue_head)
4844 GNUNET_break (0); // Should've been canceled
4847 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
4849 GNUNET_PEER_resolve (peer->id, &dst_id);
4850 /* Check if buffer size is enough for the message */
4851 if (queue->size > size)
4853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4854 "********* not enough room, reissue\n");
4855 peer->core_transmit =
4856 GNUNET_CORE_notify_transmit_ready (core_handle,
4859 GNUNET_TIME_UNIT_FOREVER_REL,
4866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
4869 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
4872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4873 "********* unicast: t->q (%u/%u)\n",
4874 t->fwd_queue_n, t->fwd_queue_max);
4876 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
4879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
4883 switch (queue->type)
4886 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4887 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
4888 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
4889 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
4890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4891 "********* raw: %s\n",
4892 GNUNET_MESH_DEBUG_M2S (queue->type));
4894 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4895 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4896 data_size = send_core_data_raw (queue->cls, size, buf);
4897 msg = (struct GNUNET_MessageHeader *) buf;
4898 switch (ntohs (msg->type)) // Type of preconstructed message
4900 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4901 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
4903 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4904 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4910 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
4913 struct MeshTransmissionDescriptor *info = queue->cls;
4915 if ((1 == info->mesh_data->reference_counter
4916 && GNUNET_YES == t->speed_min)
4918 (info->mesh_data->total_out == info->mesh_data->reference_counter
4919 && GNUNET_NO == t->speed_min))
4921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4922 "********* considered sent\n");
4926 data_size = send_core_data_multicast(queue->cls, size, buf);
4927 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
4929 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
4931 data_size = send_core_path_create (queue->cls, size, buf);
4933 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
4934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
4935 data_size = send_core_path_ack (queue->cls, size, buf);
4937 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
4938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path keepalive\n");
4939 data_size = send_core_data_multicast (queue->cls, size, buf);
4943 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4944 "********* type unknown: %u\n",
4948 switch (queue->type)
4950 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4951 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4952 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4953 cinfo = tunnel_get_neighbor_fc (t, &dst_id);
4954 if (cinfo->send_buffer[cinfo->send_buffer_start] != queue)
4957 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4958 "at pos %u (%p) != %p\n",
4959 cinfo->send_buffer_start,
4960 cinfo->send_buffer[cinfo->send_buffer_start],
4963 if (cinfo->send_buffer_n > 0)
4965 cinfo->send_buffer[cinfo->send_buffer_start] = NULL;
4966 cinfo->send_buffer_n--;
4967 cinfo->send_buffer_start++;
4968 cinfo->send_buffer_start %= t->fwd_queue_max;
4979 /* Free queue, but cls was freed by send_core_* */
4980 queue_destroy (queue, GNUNET_NO);
4982 if (GNUNET_YES == t->destroy)
4984 // FIXME fc tunnel destroy all pending traffic? wait for it?
4985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
4989 /* If more data in queue, send next */
4990 queue = queue_get_next(peer);
4993 struct GNUNET_PeerIdentity id;
4995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
4996 GNUNET_PEER_resolve (peer->id, &id);
4997 peer->core_transmit =
4998 GNUNET_CORE_notify_transmit_ready(core_handle,
5001 GNUNET_TIME_UNIT_FOREVER_REL,
5009 if (NULL != peer->queue_head)
5011 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5012 "********* %s stalled\n",
5013 GNUNET_i2s(&my_full_id));
5015 cinfo = tunnel_get_neighbor_fc (t, &dst_id);
5016 cinfo->fc_poll = GNUNET_SCHEDULER_add_delayed(GNUNET_TIME_UNIT_SECONDS,
5017 &tunnel_poll, cinfo);
5020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
5026 * @brief Queue and pass message to core when possible.
5028 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
5029 * and accounts for it. In case the queue is full, the message is dropped and
5032 * Otherwise, message is treated as internal and allowed to go regardless of
5035 * @param cls Closure (@c type dependant). It will be used by queue_send to
5036 * build the message to be sent if not already prebuilt.
5037 * @param type Type of the message, 0 for a raw message.
5038 * @param size Size of the message.
5039 * @param dst Neighbor to send message to.
5040 * @param t Tunnel this message belongs to.
5043 queue_add (void *cls, uint16_t type, size_t size,
5044 struct MeshPeerInfo *dst, struct MeshTunnel *t)
5046 struct MeshPeerQueue *queue;
5047 struct MeshTunnelChildInfo *cinfo;
5048 struct GNUNET_PeerIdentity id;
5054 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
5055 GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
5057 n = &t->fwd_queue_n;
5058 max = &t->fwd_queue_max;
5060 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
5062 n = &t->bck_queue_n;
5063 max = &t->bck_queue_max;
5068 if (NULL == t->owner)
5069 GNUNET_break_op(0); // TODO: kill connection?
5072 GNUNET_STATISTICS_update(stats, "# messages dropped (buffer full)",
5074 return; // Drop message
5078 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
5084 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
5085 GNUNET_PEER_resolve (dst->id, &id);
5086 if (NULL == dst->core_transmit)
5088 dst->core_transmit =
5089 GNUNET_CORE_notify_transmit_ready (core_handle,
5092 GNUNET_TIME_UNIT_FOREVER_REL,
5098 if (NULL == n) // Is this internal mesh traffic?
5101 // It's payload, keep track of buffer per peer.
5102 cinfo = tunnel_get_neighbor_fc(t, &id);
5103 i = (cinfo->send_buffer_start + cinfo->send_buffer_n) % t->fwd_queue_max;
5104 if (NULL != cinfo->send_buffer[i])
5106 GNUNET_break (cinfo->send_buffer_n == t->fwd_queue_max); // aka i == start
5107 queue_destroy (cinfo->send_buffer[cinfo->send_buffer_start], GNUNET_YES);
5108 cinfo->send_buffer_start++;
5109 cinfo->send_buffer_start %= t->fwd_queue_max;
5113 cinfo->send_buffer_n++;
5115 cinfo->send_buffer[i] = queue;
5116 if (cinfo->send_buffer_n > t->fwd_queue_max)
5119 cinfo->send_buffer_n = t->fwd_queue_max;
5124 /******************************************************************************/
5125 /******************** MESH NETWORK HANDLERS **************************/
5126 /******************************************************************************/
5130 * Core handler for path creation
5132 * @param cls closure
5133 * @param message message
5134 * @param peer peer identity this notification is about
5135 * @param atsi performance data
5136 * @param atsi_count number of records in 'atsi'
5138 * @return GNUNET_OK to keep the connection open,
5139 * GNUNET_SYSERR to close it (signal serious error)
5142 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
5143 const struct GNUNET_MessageHeader *message,
5144 const struct GNUNET_ATS_Information *atsi,
5145 unsigned int atsi_count)
5147 unsigned int own_pos;
5150 MESH_TunnelNumber tid;
5151 struct GNUNET_MESH_ManipulatePath *msg;
5152 struct GNUNET_PeerIdentity *pi;
5153 struct GNUNET_HashCode hash;
5154 struct MeshPeerPath *path;
5155 struct MeshPeerInfo *dest_peer_info;
5156 struct MeshPeerInfo *orig_peer_info;
5157 struct MeshTunnel *t;
5159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5160 "Received a path create msg [%s]\n",
5161 GNUNET_i2s (&my_full_id));
5162 size = ntohs (message->size);
5163 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5165 GNUNET_break_op (0);
5169 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5170 if (size % sizeof (struct GNUNET_PeerIdentity))
5172 GNUNET_break_op (0);
5175 size /= sizeof (struct GNUNET_PeerIdentity);
5178 GNUNET_break_op (0);
5181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5182 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5184 tid = ntohl (msg->tid);
5185 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5187 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
5188 t = tunnel_get (pi, tid);
5189 if (NULL == t) // FIXME only for INCOMING tunnels?
5193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
5194 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
5197 // FIXME notify failure
5200 opt = ntohl (msg->opt);
5201 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
5202 GNUNET_YES : GNUNET_NO;
5203 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
5205 t->nobuffer = GNUNET_YES;
5206 t->last_fwd_ack = t->fwd_pid + 1;
5208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5209 " speed_min: %d, nobuffer:%d\n",
5210 t->speed_min, t->nobuffer);
5212 if (GNUNET_YES == t->nobuffer)
5214 t->bck_queue_max = 1;
5215 t->fwd_queue_max = 1;
5218 // FIXME only assign a local tid if a local client is interested (on demand)
5219 while (NULL != tunnel_get_incoming (next_local_tid))
5220 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5221 t->local_tid_dest = next_local_tid++;
5222 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5225 tunnel_reset_timeout (t);
5226 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
5228 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
5229 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
5237 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
5238 if (NULL == dest_peer_info)
5240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5241 " Creating PeerInfo for destination.\n");
5242 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5243 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
5244 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
5246 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5248 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
5249 if (NULL == orig_peer_info)
5251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5252 " Creating PeerInfo for origin.\n");
5253 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5254 orig_peer_info->id = GNUNET_PEER_intern (pi);
5255 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
5256 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5258 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5259 path = path_new (size);
5261 for (i = 0; i < size; i++)
5263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5264 GNUNET_i2s (&pi[i]));
5265 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5266 if (path->peers[i] == myid)
5269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5272 /* cannot be self, must be 'not found' */
5273 /* create path: self not found in path through self */
5274 GNUNET_break_op (0);
5275 path_destroy (path);
5279 path_add_to_peers (path, GNUNET_NO);
5280 tunnel_add_path (t, path, own_pos);
5281 if (own_pos == size - 1)
5283 /* It is for us! Send ack. */
5284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5285 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
5286 if (NULL == t->peers)
5288 /* New tunnel! Notify clients on first payload message. */
5289 t->peers = GNUNET_CONTAINER_multihashmap_create (4, GNUNET_NO);
5291 GNUNET_break (GNUNET_SYSERR !=
5292 GNUNET_CONTAINER_multihashmap_put (t->peers,
5293 &my_full_id.hashPubKey,
5296 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
5301 struct MeshPeerPath *path2;
5303 /* It's for somebody else! Retransmit. */
5304 path2 = path_duplicate (path);
5305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
5306 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
5307 path2 = path_duplicate (path);
5308 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
5309 send_create_path (dest_peer_info, path, t);
5316 * Core handler for path destruction
5318 * @param cls closure
5319 * @param message message
5320 * @param peer peer identity this notification is about
5321 * @param atsi performance data
5322 * @param atsi_count number of records in 'atsi'
5324 * @return GNUNET_OK to keep the connection open,
5325 * GNUNET_SYSERR to close it (signal serious error)
5328 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5329 const struct GNUNET_MessageHeader *message,
5330 const struct GNUNET_ATS_Information *atsi,
5331 unsigned int atsi_count)
5333 struct GNUNET_MESH_ManipulatePath *msg;
5334 struct GNUNET_PeerIdentity *pi;
5335 struct MeshPeerPath *path;
5336 struct MeshTunnel *t;
5337 unsigned int own_pos;
5341 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5342 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
5343 size = ntohs (message->size);
5344 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5346 GNUNET_break_op (0);
5350 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5351 if (size % sizeof (struct GNUNET_PeerIdentity))
5353 GNUNET_break_op (0);
5356 size /= sizeof (struct GNUNET_PeerIdentity);
5359 GNUNET_break_op (0);
5362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5364 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5365 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5367 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
5369 t = tunnel_get (pi, ntohl (msg->tid));
5372 /* TODO notify back: we don't know this tunnel */
5373 GNUNET_break_op (0);
5376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5377 path = path_new (size);
5379 for (i = 0; i < size; i++)
5381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5382 GNUNET_i2s (&pi[i]));
5383 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5384 if (path->peers[i] == myid)
5387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5388 if (own_pos < path->length - 1)
5389 send_prebuilt_message (message, &pi[own_pos + 1], t);
5391 send_client_tunnel_disconnect(t, NULL);
5393 tunnel_delete_peer (t, path->peers[path->length - 1]);
5394 path_destroy (path);
5400 * Core handler for notifications of broken paths
5402 * @param cls closure
5403 * @param message message
5404 * @param peer peer identity this notification is about
5405 * @param atsi performance data
5406 * @param atsi_count number of records in 'atsi'
5408 * @return GNUNET_OK to keep the connection open,
5409 * GNUNET_SYSERR to close it (signal serious error)
5412 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
5413 const struct GNUNET_MessageHeader *message,
5414 const struct GNUNET_ATS_Information *atsi,
5415 unsigned int atsi_count)
5417 struct GNUNET_MESH_PathBroken *msg;
5418 struct MeshTunnel *t;
5420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5421 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
5422 msg = (struct GNUNET_MESH_PathBroken *) message;
5423 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5424 GNUNET_i2s (&msg->peer1));
5425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5426 GNUNET_i2s (&msg->peer2));
5427 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5430 GNUNET_break_op (0);
5433 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
5434 GNUNET_PEER_search (&msg->peer2));
5441 * Core handler for tunnel destruction
5443 * @param cls closure
5444 * @param message message
5445 * @param peer peer identity this notification is about
5446 * @param atsi performance data
5447 * @param atsi_count number of records in 'atsi'
5449 * @return GNUNET_OK to keep the connection open,
5450 * GNUNET_SYSERR to close it (signal serious error)
5453 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5454 const struct GNUNET_MessageHeader *message,
5455 const struct GNUNET_ATS_Information *atsi,
5456 unsigned int atsi_count)
5458 struct GNUNET_MESH_TunnelDestroy *msg;
5459 struct MeshTunnel *t;
5461 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5462 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
5463 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
5464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
5465 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
5466 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5469 /* Probably already got the message from another path,
5470 * destroyed the tunnel and retransmitted to children.
5473 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5476 if (t->id.oid == myid)
5478 GNUNET_break_op (0);
5481 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5483 /* Tunnel was incoming, notify clients */
5484 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
5485 t->local_tid, t->local_tid_dest);
5486 send_clients_tunnel_destroy (t);
5488 tunnel_send_destroy (t);
5489 t->destroy = GNUNET_YES;
5490 // TODO: add timeout to destroy the tunnel anyway
5496 * Core handler for mesh network traffic going from the origin to a peer
5498 * @param cls closure
5499 * @param peer peer identity this notification is about
5500 * @param message message
5501 * @param atsi performance data
5502 * @param atsi_count number of records in 'atsi'
5503 * @return GNUNET_OK to keep the connection open,
5504 * GNUNET_SYSERR to close it (signal serious error)
5507 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5508 const struct GNUNET_MessageHeader *message,
5509 const struct GNUNET_ATS_Information *atsi,
5510 unsigned int atsi_count)
5512 struct GNUNET_MESH_Unicast *msg;
5513 struct GNUNET_PeerIdentity *neighbor;
5514 struct MeshTunnelChildInfo *cinfo;
5515 struct MeshTunnel *t;
5516 GNUNET_PEER_Id dest_id;
5521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
5524 size = ntohs (message->size);
5526 sizeof (struct GNUNET_MESH_Unicast) +
5527 sizeof (struct GNUNET_MessageHeader))
5532 msg = (struct GNUNET_MESH_Unicast *) message;
5533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5534 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5536 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5539 /* TODO notify back: we don't know this tunnel */
5540 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5541 GNUNET_break_op (0);
5544 pid = ntohl (msg->pid);
5545 if (t->fwd_pid == pid)
5547 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5548 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5549 " Already seen pid %u, DROPPING!\n", pid);
5554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5555 " pid %u not seen yet, forwarding\n", pid);
5558 t->skip += (pid - t->fwd_pid) - 1;
5561 if (GMC_is_pid_bigger (pid, t->last_fwd_ack))
5563 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5564 GNUNET_break_op (0);
5565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5566 "Received PID %u, ACK %u\n",
5567 pid, t->last_fwd_ack);
5571 tunnel_reset_timeout (t);
5572 dest_id = GNUNET_PEER_search (&msg->destination);
5573 if (dest_id == myid)
5575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5576 " it's for us! sending to clients...\n");
5577 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
5578 send_subscribed_clients (message, &msg[1].header, t);
5579 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5582 ttl = ntohl (msg->ttl);
5583 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5586 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5587 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5588 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5592 " not for us, retransmitting...\n");
5594 neighbor = tree_get_first_hop (t->tree, dest_id);
5595 cinfo = tunnel_get_neighbor_fc (t, neighbor);
5597 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
5600 if (GNUNET_YES == t->nobuffer &&
5601 GNUNET_YES == GMC_is_pid_bigger (pid, cinfo->fwd_ack))
5603 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5604 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " %u > %u\n", pid, cinfo->fwd_ack);
5605 GNUNET_break_op (0);
5608 send_prebuilt_message (message, neighbor, t);
5609 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
5615 * Core handler for mesh network traffic going from the origin to all peers
5617 * @param cls closure
5618 * @param message message
5619 * @param peer peer identity this notification is about
5620 * @param atsi performance data
5621 * @param atsi_count number of records in 'atsi'
5622 * @return GNUNET_OK to keep the connection open,
5623 * GNUNET_SYSERR to close it (signal serious error)
5625 * TODO: Check who we got this from, to validate route.
5628 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5629 const struct GNUNET_MessageHeader *message,
5630 const struct GNUNET_ATS_Information *atsi,
5631 unsigned int atsi_count)
5633 struct GNUNET_MESH_Multicast *msg;
5634 struct MeshTunnel *t;
5638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
5640 size = ntohs (message->size);
5641 if (sizeof (struct GNUNET_MESH_Multicast) +
5642 sizeof (struct GNUNET_MessageHeader) > size)
5644 GNUNET_break_op (0);
5647 msg = (struct GNUNET_MESH_Multicast *) message;
5648 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5652 /* TODO notify that we dont know that tunnel */
5653 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5654 GNUNET_break_op (0);
5657 pid = ntohl (msg->pid);
5658 if (t->fwd_pid == pid)
5660 /* already seen this packet, drop */
5661 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5662 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5663 " Already seen pid %u, DROPPING!\n", pid);
5664 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5670 " pid %u not seen yet, forwarding\n", pid);
5672 t->skip += (pid - t->fwd_pid) - 1;
5674 tunnel_reset_timeout (t);
5676 /* Transmit to locally interested clients */
5677 if (NULL != t->peers &&
5678 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
5680 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
5681 send_subscribed_clients (message, &msg[1].header, t);
5682 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
5685 if (ntohl (msg->ttl) == 0)
5687 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5688 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5689 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5692 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
5693 tunnel_send_multicast (t, message);
5699 * Core handler for mesh network traffic toward the owner of a tunnel
5701 * @param cls closure
5702 * @param message message
5703 * @param peer peer identity this notification is about
5704 * @param atsi performance data
5705 * @param atsi_count number of records in 'atsi'
5707 * @return GNUNET_OK to keep the connection open,
5708 * GNUNET_SYSERR to close it (signal serious error)
5711 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
5712 const struct GNUNET_MessageHeader *message,
5713 const struct GNUNET_ATS_Information *atsi,
5714 unsigned int atsi_count)
5716 struct GNUNET_MESH_ToOrigin *msg;
5717 struct GNUNET_PeerIdentity id;
5718 struct MeshPeerInfo *peer_info;
5719 struct MeshTunnel *t;
5723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
5725 size = ntohs (message->size);
5726 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
5727 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
5729 GNUNET_break_op (0);
5732 msg = (struct GNUNET_MESH_ToOrigin *) message;
5733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5734 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5735 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5739 /* TODO notify that we dont know this tunnel (whom)? */
5740 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5741 GNUNET_break_op (0);
5745 if (NULL != t->owner)
5748 struct GNUNET_MESH_ToOrigin *copy;
5750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5751 " it's for us! sending to clients...\n");
5752 /* TODO signature verification */
5753 memcpy (cbuf, message, size);
5754 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
5755 copy->tid = htonl (t->local_tid);
5756 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
5757 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
5758 ©->header, GNUNET_NO);
5759 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5763 " not for us, retransmitting...\n");
5765 peer_info = peer_info_get (&msg->oid);
5766 if (NULL == peer_info)
5768 /* unknown origin of tunnel */
5772 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5773 send_prebuilt_message (message, &id, t);
5774 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
5781 * Core handler for mesh network traffic point-to-point acks.
5783 * @param cls closure
5784 * @param message message
5785 * @param peer peer identity this notification is about
5786 * @param atsi performance data
5787 * @param atsi_count number of records in 'atsi'
5789 * @return GNUNET_OK to keep the connection open,
5790 * GNUNET_SYSERR to close it (signal serious error)
5793 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5794 const struct GNUNET_MessageHeader *message,
5795 const struct GNUNET_ATS_Information *atsi,
5796 unsigned int atsi_count)
5798 struct GNUNET_MESH_ACK *msg;
5799 struct MeshTunnel *t;
5802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
5804 msg = (struct GNUNET_MESH_ACK *) message;
5806 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5810 /* TODO notify that we dont know this tunnel (whom)? */
5811 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
5812 GNUNET_break_op (0);
5815 ack = ntohl (msg->pid);
5817 /* Is this a forward or backward ACK? */
5818 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
5820 struct MeshTunnelChildInfo *cinfo;
5823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
5824 cinfo = tunnel_get_neighbor_fc (t, peer);
5825 cinfo->fwd_ack = ack;
5826 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5827 tunnel_unlock_fwd_queues (t);
5831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
5833 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5834 tunnel_unlock_bck_queue (t);
5841 * Core handler for mesh network traffic point-to-point ack polls.
5843 * @param cls closure
5844 * @param message message
5845 * @param peer peer identity this notification is about
5846 * @param atsi performance data
5847 * @param atsi_count number of records in 'atsi'
5849 * @return GNUNET_OK to keep the connection open,
5850 * GNUNET_SYSERR to close it (signal serious error)
5853 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
5854 const struct GNUNET_MessageHeader *message,
5855 const struct GNUNET_ATS_Information *atsi,
5856 unsigned int atsi_count)
5858 struct GNUNET_MESH_Poll *msg;
5859 struct MeshTunnel *t;
5861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
5864 msg = (struct GNUNET_MESH_Poll *) message;
5866 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5870 /* TODO notify that we dont know this tunnel (whom)? */
5871 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
5872 GNUNET_break_op (0);
5876 /* Is this a forward or backward ACK? */
5877 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
5879 struct MeshTunnelChildInfo *cinfo;
5881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
5882 cinfo = tunnel_get_neighbor_fc (t, peer);
5883 cinfo->bck_ack = cinfo->pid; // mark as ready to send
5884 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
5888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
5889 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
5897 * Core handler for path ACKs
5899 * @param cls closure
5900 * @param message message
5901 * @param peer peer identity this notification is about
5902 * @param atsi performance data
5903 * @param atsi_count number of records in 'atsi'
5905 * @return GNUNET_OK to keep the connection open,
5906 * GNUNET_SYSERR to close it (signal serious error)
5909 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5910 const struct GNUNET_MessageHeader *message,
5911 const struct GNUNET_ATS_Information *atsi,
5912 unsigned int atsi_count)
5914 struct GNUNET_MESH_PathACK *msg;
5915 struct GNUNET_PeerIdentity id;
5916 struct MeshPeerInfo *peer_info;
5917 struct MeshPeerPath *p;
5918 struct MeshTunnel *t;
5920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
5921 GNUNET_i2s (&my_full_id));
5922 msg = (struct GNUNET_MESH_PathACK *) message;
5923 t = tunnel_get (&msg->oid, ntohl(msg->tid));
5926 /* TODO notify that we don't know the tunnel */
5927 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
5929 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
5933 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5935 peer_info = peer_info_get (&msg->peer_id);
5936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
5937 GNUNET_i2s (&msg->peer_id));
5938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
5941 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
5943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5944 "connect_by_string completed, stopping search\n");
5945 regex_cancel_search (t->regex_ctx);
5946 t->regex_ctx = NULL;
5949 /* Add paths to peers? */
5950 p = tree_get_path_to_peer (t->tree, peer_info->id);
5953 path_add_to_peers (p, GNUNET_YES);
5961 /* Message for us? */
5962 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
5964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5965 if (NULL == t->owner)
5967 GNUNET_break_op (0);
5970 if (NULL != t->dht_get_type)
5972 GNUNET_DHT_get_stop (t->dht_get_type);
5973 t->dht_get_type = NULL;
5975 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
5977 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
5978 send_client_peer_connected (t, peer_info->id);
5983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5984 " not for us, retransmitting...\n");
5985 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5986 peer_info = peer_info_get (&msg->oid);
5987 if (NULL == peer_info)
5989 /* If we know the tunnel, we should DEFINITELY know the peer */
5993 send_prebuilt_message (message, &id, t);
5999 * Core handler for mesh keepalives.
6001 * @param cls closure
6002 * @param message message
6003 * @param peer peer identity this notification is about
6004 * @param atsi performance data
6005 * @param atsi_count number of records in 'atsi'
6006 * @return GNUNET_OK to keep the connection open,
6007 * GNUNET_SYSERR to close it (signal serious error)
6009 * TODO: Check who we got this from, to validate route.
6012 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
6013 const struct GNUNET_MessageHeader *message,
6014 const struct GNUNET_ATS_Information *atsi,
6015 unsigned int atsi_count)
6017 struct GNUNET_MESH_TunnelKeepAlive *msg;
6018 struct MeshTunnel *t;
6020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
6023 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
6024 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6028 /* TODO notify that we dont know that tunnel */
6029 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1, GNUNET_NO);
6030 GNUNET_break_op (0);
6034 tunnel_reset_timeout (t);
6036 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
6037 tunnel_send_multicast (t, message);
6044 * Functions to handle messages from core
6046 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
6047 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
6048 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
6049 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
6050 sizeof (struct GNUNET_MESH_PathBroken)},
6051 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
6052 sizeof (struct GNUNET_MESH_TunnelDestroy)},
6053 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
6054 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
6055 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
6056 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
6057 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
6058 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
6059 sizeof (struct GNUNET_MESH_ACK)},
6060 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
6061 sizeof (struct GNUNET_MESH_Poll)},
6062 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
6063 sizeof (struct GNUNET_MESH_PathACK)},
6069 /******************************************************************************/
6070 /**************** MESH LOCAL HANDLER HELPERS ***********************/
6071 /******************************************************************************/
6074 * deregister_app: iterator for removing each application registered by a client
6076 * @param cls closure
6077 * @param key the hash of the application id (used to access the hashmap)
6078 * @param value the value stored at the key (client)
6080 * @return GNUNET_OK on success
6083 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
6085 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
6086 GNUNET_break (GNUNET_YES ==
6087 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
6093 * notify_client_connection_failure: notify a client that the connection to the
6094 * requested remote peer is not possible (for instance, no route found)
6095 * Function called when the socket is ready to queue more data. "buf" will be
6096 * NULL and "size" zero if the socket was closed for writing in the meantime.
6098 * @param cls closure
6099 * @param size number of bytes available in buf
6100 * @param buf where the callee should write the message
6101 * @return number of bytes written to buf
6104 notify_client_connection_failure (void *cls, size_t size, void *buf)
6107 struct MeshPeerInfo *peer_info;
6108 struct GNUNET_MESH_PeerControl *msg;
6109 struct GNUNET_PeerIdentity id;
6111 if (0 == size && NULL == buf)
6113 // TODO retry? cancel?
6117 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
6118 peer_info = (struct MeshPeerInfo *) cls;
6119 msg = (struct GNUNET_MESH_PeerControl *) buf;
6120 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
6121 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
6122 // msg->tunnel_id = htonl(peer_info->t->tid);
6123 GNUNET_PEER_resolve (peer_info->id, &id);
6124 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
6132 * Send keepalive packets for a peer
6134 * @param cls Closure (tunnel for which to send the keepalive).
6135 * @param tc Notification context.
6138 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6140 struct MeshTunnel *t = cls;
6141 struct GNUNET_MESH_TunnelKeepAlive *msg;
6142 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
6145 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
6146 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
6151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6152 "sending keepalive for tunnel %d\n", t->id.tid);
6154 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
6155 msg->header.size = htons (size);
6156 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
6157 msg->oid = my_full_id;
6158 msg->tid = htonl (t->id.tid);
6159 tunnel_send_multicast (t, &msg->header);
6161 t->path_refresh_task =
6162 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
6163 tunnel_reset_timeout(t);
6168 * Function to process paths received for a new peer addition. The recorded
6169 * paths form the initial tunnel, which can be optimized later.
6170 * Called on each result obtained for the DHT search.
6172 * @param cls closure
6173 * @param exp when will this value expire
6174 * @param key key of the result
6175 * @param get_path path of the get request
6176 * @param get_path_length lenght of get_path
6177 * @param put_path path of the put request
6178 * @param put_path_length length of the put_path
6179 * @param type type of the result
6180 * @param size number of bytes in data
6181 * @param data pointer to the result data
6183 * TODO: re-issue the request after certain time? cancel after X results?
6186 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6187 const struct GNUNET_HashCode * key,
6188 const struct GNUNET_PeerIdentity *get_path,
6189 unsigned int get_path_length,
6190 const struct GNUNET_PeerIdentity *put_path,
6191 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6192 size_t size, const void *data)
6194 struct MeshPathInfo *path_info = cls;
6195 struct MeshPeerPath *p;
6196 struct GNUNET_PeerIdentity pi;
6199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
6200 GNUNET_PEER_resolve (path_info->peer->id, &pi);
6201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
6203 p = path_build_from_dht (get_path, get_path_length, put_path,
6205 path_add_to_peers (p, GNUNET_NO);
6207 for (i = 0; i < path_info->peer->ntunnels; i++)
6209 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
6210 peer_info_connect (path_info->peer, path_info->t);
6218 * Function to process paths received for a new peer addition. The recorded
6219 * paths form the initial tunnel, which can be optimized later.
6220 * Called on each result obtained for the DHT search.
6222 * @param cls closure
6223 * @param exp when will this value expire
6224 * @param key key of the result
6225 * @param get_path path of the get request
6226 * @param get_path_length lenght of get_path
6227 * @param put_path path of the put request
6228 * @param put_path_length length of the put_path
6229 * @param type type of the result
6230 * @param size number of bytes in data
6231 * @param data pointer to the result data
6234 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6235 const struct GNUNET_HashCode * key,
6236 const struct GNUNET_PeerIdentity *get_path,
6237 unsigned int get_path_length,
6238 const struct GNUNET_PeerIdentity *put_path,
6239 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6240 size_t size, const void *data)
6242 const struct PBlock *pb = data;
6243 const struct GNUNET_PeerIdentity *pi = &pb->id;
6244 struct MeshTunnel *t = cls;
6245 struct MeshPeerInfo *peer_info;
6246 struct MeshPeerPath *p;
6248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
6249 if (size != sizeof (struct PBlock))
6251 GNUNET_break_op (0);
6254 if (ntohl(pb->type) != t->type)
6256 GNUNET_break_op (0);
6259 GNUNET_assert (NULL != t->owner);
6260 peer_info = peer_info_get (pi);
6261 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
6263 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
6265 p = path_build_from_dht (get_path, get_path_length, put_path,
6267 path_add_to_peers (p, GNUNET_NO);
6269 tunnel_add_peer (t, peer_info);
6270 peer_info_connect (peer_info, t);
6275 * Function to process DHT string to regex matching.
6276 * Called on each result obtained for the DHT search.
6278 * @param cls closure (search context)
6279 * @param exp when will this value expire
6280 * @param key key of the result
6281 * @param get_path path of the get request (not used)
6282 * @param get_path_length lenght of get_path (not used)
6283 * @param put_path path of the put request (not used)
6284 * @param put_path_length length of the put_path (not used)
6285 * @param type type of the result
6286 * @param size number of bytes in data
6287 * @param data pointer to the result data
6290 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6291 const struct GNUNET_HashCode * key,
6292 const struct GNUNET_PeerIdentity *get_path,
6293 unsigned int get_path_length,
6294 const struct GNUNET_PeerIdentity *put_path,
6295 unsigned int put_path_length,
6296 enum GNUNET_BLOCK_Type type,
6297 size_t size, const void *data)
6299 const struct MeshRegexAccept *block = data;
6300 struct MeshRegexSearchContext *ctx = cls;
6301 struct MeshRegexSearchInfo *info = ctx->info;
6302 struct MeshPeerPath *p;
6303 struct MeshPeerInfo *peer_info;
6305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
6306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
6308 peer_info = peer_info_get(&block->id);
6309 p = path_build_from_dht (get_path, get_path_length, put_path,
6311 path_add_to_peers (p, GNUNET_NO);
6314 tunnel_add_peer (info->t, peer_info);
6315 peer_info_connect (peer_info, info->t);
6316 if (0 == info->peer)
6318 info->peer = peer_info->id;
6322 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
6325 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
6326 ®ex_connect_timeout,
6334 * Function to process DHT string to regex matching.
6335 * Called on each result obtained for the DHT search.
6337 * @param cls closure (search context)
6338 * @param exp when will this value expire
6339 * @param key key of the result
6340 * @param get_path path of the get request (not used)
6341 * @param get_path_length lenght of get_path (not used)
6342 * @param put_path path of the put request (not used)
6343 * @param put_path_length length of the put_path (not used)
6344 * @param type type of the result
6345 * @param size number of bytes in data
6346 * @param data pointer to the result data
6348 * TODO: re-issue the request after certain time? cancel after X results?
6351 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6352 const struct GNUNET_HashCode * key,
6353 const struct GNUNET_PeerIdentity *get_path,
6354 unsigned int get_path_length,
6355 const struct GNUNET_PeerIdentity *put_path,
6356 unsigned int put_path_length,
6357 enum GNUNET_BLOCK_Type type,
6358 size_t size, const void *data)
6360 const struct MeshRegexBlock *block = data;
6361 struct MeshRegexSearchContext *ctx = cls;
6362 struct MeshRegexSearchInfo *info = ctx->info;
6366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6367 "DHT GET STRING RETURNED RESULTS\n");
6368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6369 " key: %s\n", GNUNET_h2s (key));
6371 copy = GNUNET_malloc (size);
6372 memcpy (copy, data, size);
6373 GNUNET_break (GNUNET_OK ==
6374 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
6375 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
6376 len = ntohl (block->n_proof);
6378 char proof[len + 1];
6380 memcpy (proof, &block[1], len);
6382 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
6384 GNUNET_break_op (0);
6388 len = strlen (info->description);
6389 if (len == ctx->position) // String processed
6391 if (GNUNET_YES == ntohl (block->accepting))
6393 regex_find_path(key, ctx);
6397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
6398 // FIXME REGEX this block not successful, wait for more? start timeout?
6403 regex_next_edge (block, size, ctx);
6408 /******************************************************************************/
6409 /********************* MESH LOCAL HANDLES **************************/
6410 /******************************************************************************/
6414 * Handler for client disconnection
6416 * @param cls closure
6417 * @param client identification of the client; NULL
6418 * for the last call when the server is destroyed
6421 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
6423 struct MeshClient *c;
6424 struct MeshClient *next;
6427 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
6430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
6436 if (c->handle != client)
6438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
6442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
6444 GNUNET_SERVER_client_drop (c->handle);
6445 c->shutting_down = GNUNET_YES;
6446 GNUNET_assert (NULL != c->own_tunnels);
6447 GNUNET_assert (NULL != c->incoming_tunnels);
6448 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
6449 &tunnel_destroy_iterator, c);
6450 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
6451 &tunnel_destroy_iterator, c);
6452 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
6453 &tunnel_destroy_iterator, c);
6454 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
6455 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
6456 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
6458 /* deregister clients applications */
6459 if (NULL != c->apps)
6461 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
6462 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
6464 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
6465 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
6467 GNUNET_SCHEDULER_cancel (announce_applications_task);
6468 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
6470 if (NULL != c->types)
6471 GNUNET_CONTAINER_multihashmap_destroy (c->types);
6472 for (i = 0; i < c->n_regex; i++)
6474 GNUNET_free (c->regexes[i]);
6476 GNUNET_free_non_null (c->regexes);
6477 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
6478 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
6480 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
6481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
6483 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
6486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
6492 * Handler for new clients
6494 * @param cls closure
6495 * @param client identification of the client
6496 * @param message the actual message, which includes messages the client wants
6499 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
6500 const struct GNUNET_MessageHeader *message)
6502 struct GNUNET_MESH_ClientConnect *cc_msg;
6503 struct MeshClient *c;
6504 GNUNET_MESH_ApplicationType *a;
6511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
6512 /* Check data sanity */
6513 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
6514 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
6515 ntypes = ntohs (cc_msg->types);
6516 napps = ntohs (cc_msg->applications);
6518 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
6521 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6525 /* Create new client structure */
6526 c = GNUNET_malloc (sizeof (struct MeshClient));
6527 c->id = next_client_id++;
6528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
6530 GNUNET_SERVER_client_keep (client);
6531 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
6534 GNUNET_MESH_ApplicationType at;
6535 struct GNUNET_HashCode hc;
6537 c->apps = GNUNET_CONTAINER_multihashmap_create (napps, GNUNET_NO);
6538 for (i = 0; i < napps; i++)
6541 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
6542 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
6543 /* store in clients hashmap */
6544 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
6545 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6546 /* store in global hashmap, for announcements */
6547 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
6548 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6550 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
6551 announce_applications_task =
6552 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
6558 struct GNUNET_HashCode hc;
6560 t = (uint16_t *) & a[napps];
6561 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes, GNUNET_NO);
6562 for (i = 0; i < ntypes; i++)
6565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
6566 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
6568 /* store in clients hashmap */
6569 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
6570 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6571 /* store in global hashmap */
6572 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
6573 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6577 " client has %u+%u subscriptions\n", napps, ntypes);
6579 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
6580 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6581 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6582 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6583 GNUNET_SERVER_notification_context_add (nc, client);
6584 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
6586 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
6592 * Handler for clients announcing available services by a regular expression.
6594 * @param cls closure
6595 * @param client identification of the client
6596 * @param message the actual message, which includes messages the client wants
6599 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
6600 const struct GNUNET_MessageHeader *message)
6602 struct MeshClient *c;
6606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
6608 /* Sanity check for client registration */
6609 if (NULL == (c = client_get (client)))
6612 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6617 len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
6618 regex = GNUNET_malloc (len + 1);
6619 memcpy (regex, &message[1], len);
6621 GNUNET_array_append (c->regexes, c->n_regex, regex);
6622 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
6624 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
6630 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
6636 * Handler for requests of new tunnels
6638 * @param cls closure
6639 * @param client identification of the client
6640 * @param message the actual message
6643 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
6644 const struct GNUNET_MessageHeader *message)
6646 struct GNUNET_MESH_TunnelMessage *t_msg;
6647 struct MeshTunnel *t;
6648 struct MeshClient *c;
6649 MESH_TunnelNumber tid;
6651 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
6653 /* Sanity check for client registration */
6654 if (NULL == (c = client_get (client)))
6657 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6662 /* Message sanity check */
6663 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6666 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6670 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6671 /* Sanity check for tunnel numbering */
6672 tid = ntohl (t_msg->tunnel_id);
6673 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
6676 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6679 /* Sanity check for duplicate tunnel IDs */
6680 if (NULL != tunnel_get_by_local_id (c, tid))
6683 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6687 while (NULL != tunnel_get_by_pi (myid, next_tid))
6688 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6689 t = tunnel_new (myid, next_tid++, c, tid);
6692 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
6694 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6697 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6698 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
6699 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
6700 t->peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
6703 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6709 * Handler for requests of deleting tunnels
6711 * @param cls closure
6712 * @param client identification of the client
6713 * @param message the actual message
6716 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
6717 const struct GNUNET_MessageHeader *message)
6719 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6720 struct MeshClient *c;
6721 struct MeshTunnel *t;
6722 MESH_TunnelNumber tid;
6724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6725 "Got a DESTROY TUNNEL from client!\n");
6727 /* Sanity check for client registration */
6728 if (NULL == (c = client_get (client)))
6731 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6734 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6736 /* Message sanity check */
6737 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6740 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6744 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6746 /* Retrieve tunnel */
6747 tid = ntohl (tunnel_msg->tunnel_id);
6748 t = tunnel_get_by_local_id(c, tid);
6751 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6753 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6756 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6758 client_ignore_tunnel (c, t);
6760 // TODO: when to destroy incoming tunnel?
6761 if (t->nclients == 0)
6763 GNUNET_assert (GNUNET_YES ==
6764 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
6766 GNUNET_assert (GNUNET_YES ==
6767 GNUNET_CONTAINER_multihashmap_remove (t->peers,
6768 &my_full_id.hashPubKey,
6772 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6775 send_client_tunnel_disconnect(t, c);
6776 client_delete_tunnel(c, t);
6778 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
6780 tunnel_send_destroy (t);
6781 t->destroy = GNUNET_YES;
6782 // The tunnel will be destroyed when the last message is transmitted.
6783 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6789 * Handler for requests of seeting tunnel's speed.
6791 * @param cls Closure (unused).
6792 * @param client Identification of the client.
6793 * @param message The actual message.
6796 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
6797 const struct GNUNET_MessageHeader *message)
6799 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6800 struct MeshClient *c;
6801 struct MeshTunnel *t;
6802 MESH_TunnelNumber tid;
6804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6805 "Got a SPEED request from client!\n");
6807 /* Sanity check for client registration */
6808 if (NULL == (c = client_get (client)))
6811 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6817 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6819 /* Retrieve tunnel */
6820 tid = ntohl (tunnel_msg->tunnel_id);
6821 t = tunnel_get_by_local_id(c, tid);
6824 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
6826 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6830 switch (ntohs(message->type))
6832 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
6833 t->speed_min = GNUNET_YES;
6835 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
6836 t->speed_min = GNUNET_NO;
6841 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6846 * Handler for requests of seeting tunnel's buffering policy.
6848 * @param cls Closure (unused).
6849 * @param client Identification of the client.
6850 * @param message The actual message.
6853 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
6854 const struct GNUNET_MessageHeader *message)
6856 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6857 struct MeshClient *c;
6858 struct MeshTunnel *t;
6859 MESH_TunnelNumber tid;
6861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6862 "Got a BUFFER request from client!\n");
6864 /* Sanity check for client registration */
6865 if (NULL == (c = client_get (client)))
6868 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6873 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6875 /* Retrieve tunnel */
6876 tid = ntohl (tunnel_msg->tunnel_id);
6877 t = tunnel_get_by_local_id(c, tid);
6880 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6882 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6886 switch (ntohs(message->type))
6888 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
6889 t->nobuffer = GNUNET_NO;
6891 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
6892 t->nobuffer = GNUNET_YES;
6898 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6903 * Handler for connection requests to new peers
6905 * @param cls closure
6906 * @param client identification of the client
6907 * @param message the actual message (PeerControl)
6910 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
6911 const struct GNUNET_MessageHeader *message)
6913 struct GNUNET_MESH_PeerControl *peer_msg;
6914 struct MeshPeerInfo *peer_info;
6915 struct MeshClient *c;
6916 struct MeshTunnel *t;
6917 MESH_TunnelNumber tid;
6919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
6920 /* Sanity check for client registration */
6921 if (NULL == (c = client_get (client)))
6924 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6929 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6931 /* Sanity check for message size */
6932 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6935 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6939 /* Tunnel exists? */
6940 tid = ntohl (peer_msg->tunnel_id);
6941 t = tunnel_get_by_local_id (c, tid);
6945 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6949 /* Does client own tunnel? */
6950 if (t->owner->handle != client)
6953 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
6957 GNUNET_i2s (&peer_msg->peer));
6958 peer_info = peer_info_get (&peer_msg->peer);
6960 tunnel_add_peer (t, peer_info);
6961 peer_info_connect (peer_info, t);
6963 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6969 * Handler for disconnection requests of peers in a tunnel
6971 * @param cls closure
6972 * @param client identification of the client
6973 * @param message the actual message (PeerControl)
6976 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
6977 const struct GNUNET_MessageHeader *message)
6979 struct GNUNET_MESH_PeerControl *peer_msg;
6980 struct MeshPeerInfo *peer_info;
6981 struct MeshClient *c;
6982 struct MeshTunnel *t;
6983 MESH_TunnelNumber tid;
6985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
6986 /* Sanity check for client registration */
6987 if (NULL == (c = client_get (client)))
6990 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6993 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6995 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6997 /* Sanity check for message size */
6998 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7001 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7005 /* Tunnel exists? */
7006 tid = ntohl (peer_msg->tunnel_id);
7007 t = tunnel_get_by_local_id (c, tid);
7011 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7016 /* Does client own tunnel? */
7017 if (t->owner->handle != client)
7020 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
7025 GNUNET_i2s (&peer_msg->peer));
7026 /* Is the peer in the tunnel? */
7028 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
7029 if (NULL == peer_info)
7032 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7036 /* Ok, delete peer from tunnel */
7037 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
7038 &peer_msg->peer.hashPubKey);
7040 send_destroy_path (t, peer_info->id);
7041 tunnel_delete_peer (t, peer_info->id);
7042 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7047 * Handler for blacklist requests of peers in a tunnel
7049 * @param cls closure
7050 * @param client identification of the client
7051 * @param message the actual message (PeerControl)
7053 * FIXME implement DHT block bloomfilter
7056 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
7057 const struct GNUNET_MessageHeader *message)
7059 struct GNUNET_MESH_PeerControl *peer_msg;
7060 struct MeshClient *c;
7061 struct MeshTunnel *t;
7062 MESH_TunnelNumber tid;
7064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
7065 /* Sanity check for client registration */
7066 if (NULL == (c = client_get (client)))
7069 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7074 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7076 /* Sanity check for message size */
7077 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7080 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7084 /* Tunnel exists? */
7085 tid = ntohl (peer_msg->tunnel_id);
7086 t = tunnel_get_by_local_id (c, tid);
7090 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7093 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7095 GNUNET_array_append(t->blacklisted, t->nblacklisted,
7096 GNUNET_PEER_intern(&peer_msg->peer));
7101 * Handler for unblacklist requests of peers in a tunnel
7103 * @param cls closure
7104 * @param client identification of the client
7105 * @param message the actual message (PeerControl)
7108 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
7109 const struct GNUNET_MessageHeader *message)
7111 struct GNUNET_MESH_PeerControl *peer_msg;
7112 struct MeshClient *c;
7113 struct MeshTunnel *t;
7114 MESH_TunnelNumber tid;
7118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
7119 /* Sanity check for client registration */
7120 if (NULL == (c = client_get (client)))
7123 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7128 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7130 /* Sanity check for message size */
7131 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7134 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7138 /* Tunnel exists? */
7139 tid = ntohl (peer_msg->tunnel_id);
7140 t = tunnel_get_by_local_id (c, tid);
7144 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7149 /* if peer is not known, complain */
7150 pid = GNUNET_PEER_search (&peer_msg->peer);
7157 /* search and remove from list */
7158 for (i = 0; i < t->nblacklisted; i++)
7160 if (t->blacklisted[i] == pid)
7162 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
7163 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
7168 /* if peer hasn't been blacklisted, complain */
7174 * Handler for connection requests to new peers by type
7176 * @param cls closure
7177 * @param client identification of the client
7178 * @param message the actual message (ConnectPeerByType)
7181 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
7182 const struct GNUNET_MessageHeader *message)
7184 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
7185 struct MeshClient *c;
7186 struct MeshTunnel *t;
7187 struct GNUNET_HashCode hash;
7188 MESH_TunnelNumber tid;
7190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
7191 /* Sanity check for client registration */
7192 if (NULL == (c = client_get (client)))
7195 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7200 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
7202 /* Sanity check for message size */
7203 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
7204 ntohs (connect_msg->header.size))
7207 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7211 /* Tunnel exists? */
7212 tid = ntohl (connect_msg->tunnel_id);
7213 t = tunnel_get_by_local_id (c, tid);
7217 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7221 /* Does client own tunnel? */
7222 if (t->owner->handle != client)
7225 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7229 /* Do WE have the service? */
7230 t->type = ntohl (connect_msg->type);
7231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
7232 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
7233 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
7236 /* Yes! Fast forward, add ourselves to the tunnel and send the
7237 * good news to the client, and alert the destination client of
7238 * an incoming tunnel.
7240 * FIXME send a path create to self, avoid code duplication
7242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
7243 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
7244 peer_info_get (&my_full_id),
7245 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
7248 send_client_peer_connected (t, myid);
7249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
7250 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7252 t->local_tid_dest = next_local_tid++;
7253 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
7254 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
7255 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7259 /* Ok, lets find a peer offering the service */
7260 if (NULL != t->dht_get_type)
7262 GNUNET_DHT_get_stop (t->dht_get_type);
7264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
7265 GNUNET_h2s (&hash));
7267 GNUNET_DHT_get_start (dht_handle,
7268 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
7270 dht_replication_level,
7271 GNUNET_DHT_RO_RECORD_ROUTE |
7272 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7274 &dht_get_type_handler, t);
7276 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7282 * Handler for connection requests to new peers by a string service description.
7284 * @param cls closure
7285 * @param client identification of the client
7286 * @param message the actual message, which includes messages the client wants
7289 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
7290 const struct GNUNET_MessageHeader *message)
7292 struct GNUNET_MESH_ConnectPeerByString *msg;
7293 struct MeshRegexSearchContext *ctx;
7294 struct MeshRegexSearchInfo *info;
7295 struct GNUNET_DHT_GetHandle *get_h;
7296 struct GNUNET_HashCode key;
7297 struct MeshTunnel *t;
7298 struct MeshClient *c;
7299 MESH_TunnelNumber tid;
7303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7304 "Connect by string started\n");
7305 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
7306 size = htons (message->size);
7308 /* Sanity check for client registration */
7309 if (NULL == (c = client_get (client)))
7312 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7317 /* Message size sanity check */
7318 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
7321 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7325 /* Tunnel exists? */
7326 tid = ntohl (msg->tunnel_id);
7327 t = tunnel_get_by_local_id (c, tid);
7331 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7335 /* Does client own tunnel? */
7336 if (t->owner->handle != client)
7339 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7344 " on tunnel %s [%u]\n",
7345 GNUNET_i2s(&my_full_id),
7348 /* Only one connect_by_string allowed at the same time! */
7349 /* FIXME: allow more, return handle at api level to cancel, document */
7350 if (NULL != t->regex_ctx)
7353 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7357 /* Find string itself */
7358 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
7359 string = (const char *) &msg[1];
7361 /* Initialize context */
7362 size = GNUNET_REGEX_get_first_key(string, len, &key);
7363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7364 " consumed %u bits out of %u\n", size, len);
7365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7366 " looking for %s\n", GNUNET_h2s (&key));
7368 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
7370 info->description = GNUNET_malloc (len + 1);
7371 memcpy (info->description, string, len);
7372 info->description[len] = '\0';
7373 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32, GNUNET_NO);
7374 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32, GNUNET_NO);
7375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
7377 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
7378 ctx->position = size;
7382 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
7384 /* Start search in DHT */
7385 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
7386 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
7387 &key, /* key to search */
7388 dht_replication_level, /* replication level */
7389 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7390 NULL, /* xquery */ // FIXME BLOOMFILTER
7391 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
7392 &dht_get_string_handler, ctx);
7394 GNUNET_break (GNUNET_OK ==
7395 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
7398 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
7400 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
7406 * Handler for client traffic directed to one peer
7408 * @param cls closure
7409 * @param client identification of the client
7410 * @param message the actual message
7413 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
7414 const struct GNUNET_MessageHeader *message)
7416 struct MeshClient *c;
7417 struct MeshTunnel *t;
7418 struct MeshPeerInfo *pi;
7419 struct GNUNET_MESH_Unicast *data_msg;
7420 MESH_TunnelNumber tid;
7423 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7424 "Got a unicast request from a client!\n");
7426 /* Sanity check for client registration */
7427 if (NULL == (c = client_get (client)))
7430 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7433 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7435 data_msg = (struct GNUNET_MESH_Unicast *) message;
7437 /* Sanity check for message size */
7438 size = ntohs (message->size);
7439 if (sizeof (struct GNUNET_MESH_Unicast) +
7440 sizeof (struct GNUNET_MessageHeader) > size)
7443 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7447 /* Tunnel exists? */
7448 tid = ntohl (data_msg->tid);
7449 t = tunnel_get_by_local_id (c, tid);
7453 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7457 /* Is it a local tunnel? Then, does client own the tunnel? */
7458 if (t->owner->handle != client)
7461 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7465 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
7466 &data_msg->destination.hashPubKey);
7467 /* Is the selected peer in the tunnel? */
7471 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7475 /* PID should be as expected */
7476 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7479 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7480 "Unicast PID, expected %u, got %u\n",
7481 t->fwd_pid + 1, ntohl (data_msg->pid));
7482 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7486 /* Ok, everything is correct, send the message
7487 * (pretend we got it from a mesh peer)
7490 /* Work around const limitation */
7491 char buf[ntohs (message->size)] GNUNET_ALIGN;
7492 struct GNUNET_MESH_Unicast *copy;
7494 copy = (struct GNUNET_MESH_Unicast *) buf;
7495 memcpy (buf, data_msg, size);
7496 copy->oid = my_full_id;
7497 copy->tid = htonl (t->id.tid);
7498 copy->ttl = htonl (default_ttl);
7499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7500 " calling generic handler...\n");
7501 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
7503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
7504 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7511 * Handler for client traffic directed to the origin
7513 * @param cls closure
7514 * @param client identification of the client
7515 * @param message the actual message
7518 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
7519 const struct GNUNET_MessageHeader *message)
7521 struct GNUNET_MESH_ToOrigin *data_msg;
7522 struct MeshTunnelClientInfo *clinfo;
7523 struct MeshClient *c;
7524 struct MeshTunnel *t;
7525 MESH_TunnelNumber tid;
7528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7529 "Got a ToOrigin request from a client!\n");
7530 /* Sanity check for client registration */
7531 if (NULL == (c = client_get (client)))
7534 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7539 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
7541 /* Sanity check for message size */
7542 size = ntohs (message->size);
7543 if (sizeof (struct GNUNET_MESH_ToOrigin) +
7544 sizeof (struct GNUNET_MessageHeader) > size)
7547 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7551 /* Tunnel exists? */
7552 tid = ntohl (data_msg->tid);
7553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7554 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
7557 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7560 t = tunnel_get_by_local_id (c, tid);
7563 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7564 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7566 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7570 /* It should be sent by someone who has this as incoming tunnel. */
7571 if (GNUNET_NO == client_knows_tunnel (c, t))
7574 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7578 /* PID should be as expected */
7579 clinfo = tunnel_get_client_fc (t, c);
7580 if (ntohl (data_msg->pid) != clinfo->bck_pid + 1)
7583 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7584 "To Origin PID, expected %u, got %u\n",
7585 clinfo->bck_pid + 1,
7586 ntohl (data_msg->pid));
7587 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7591 /* Ok, everything is correct, send the message
7592 * (pretend we got it from a mesh peer)
7596 char buf[ntohs (message->size)] GNUNET_ALIGN;
7597 struct GNUNET_MESH_ToOrigin *copy;
7599 /* Work around const limitation */
7600 copy = (struct GNUNET_MESH_ToOrigin *) buf;
7601 memcpy (buf, data_msg, size);
7602 GNUNET_PEER_resolve (t->id.oid, ©->oid);
7603 copy->tid = htonl (t->id.tid);
7604 copy->ttl = htonl (default_ttl);
7605 if (ntohl (copy->pid) != (t->bck_pid + 1))
7608 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7609 "To Origin PID, expected %u, got %u\n",
7615 copy->sender = my_full_id;
7616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7617 " calling generic handler...\n");
7618 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
7620 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7627 * Handler for client traffic directed to all peers in a tunnel
7629 * @param cls closure
7630 * @param client identification of the client
7631 * @param message the actual message
7634 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
7635 const struct GNUNET_MessageHeader *message)
7637 struct MeshClient *c;
7638 struct MeshTunnel *t;
7639 struct GNUNET_MESH_Multicast *data_msg;
7640 MESH_TunnelNumber tid;
7642 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7643 "Got a multicast request from a client!\n");
7645 /* Sanity check for client registration */
7646 if (NULL == (c = client_get (client)))
7649 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7654 data_msg = (struct GNUNET_MESH_Multicast *) message;
7656 /* Sanity check for message size */
7657 if (sizeof (struct GNUNET_MESH_Multicast) +
7658 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
7661 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7665 /* Tunnel exists? */
7666 tid = ntohl (data_msg->tid);
7667 t = tunnel_get_by_local_id (c, tid);
7671 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7672 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7674 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7678 /* Does client own tunnel? */
7679 if (t->owner->handle != client)
7682 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7686 /* PID should be as expected */
7687 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7690 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7691 "Multicast PID, expected %u, got %u\n",
7692 t->fwd_pid + 1, ntohl (data_msg->pid));
7693 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7698 char buf[ntohs (message->size)] GNUNET_ALIGN;
7699 struct GNUNET_MESH_Multicast *copy;
7701 copy = (struct GNUNET_MESH_Multicast *) buf;
7702 memcpy (buf, message, ntohs (message->size));
7703 copy->oid = my_full_id;
7704 copy->tid = htonl (t->id.tid);
7705 copy->ttl = htonl (default_ttl);
7706 GNUNET_assert (ntohl (copy->pid) == (t->fwd_pid + 1));
7707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7708 " calling generic handler...\n");
7709 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
7712 GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
7718 * Handler for client's ACKs for payload traffic.
7720 * @param cls Closure (unused).
7721 * @param client Identification of the client.
7722 * @param message The actual message.
7725 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
7726 const struct GNUNET_MessageHeader *message)
7728 struct GNUNET_MESH_LocalAck *msg;
7729 struct MeshTunnel *t;
7730 struct MeshClient *c;
7731 MESH_TunnelNumber tid;
7734 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
7735 /* Sanity check for client registration */
7736 if (NULL == (c = client_get (client)))
7739 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7744 msg = (struct GNUNET_MESH_LocalAck *) message;
7746 /* Tunnel exists? */
7747 tid = ntohl (msg->tunnel_id);
7748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7749 t = tunnel_get_by_local_id (c, tid);
7753 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7754 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
7755 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7759 ack = ntohl (msg->max_pid);
7760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
7762 /* Does client own tunnel? I.E: Is this and ACK for BCK traffic? */
7763 if (NULL != t->owner && t->owner->handle == client)
7765 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
7767 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7771 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
7772 tunnel_set_client_fwd_ack (t, c, ack);
7773 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7776 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7783 * Functions to handle messages from clients
7785 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
7786 {&handle_local_new_client, NULL,
7787 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
7788 {&handle_local_announce_regex, NULL,
7789 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
7790 {&handle_local_tunnel_create, NULL,
7791 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
7792 sizeof (struct GNUNET_MESH_TunnelMessage)},
7793 {&handle_local_tunnel_destroy, NULL,
7794 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
7795 sizeof (struct GNUNET_MESH_TunnelMessage)},
7796 {&handle_local_tunnel_speed, NULL,
7797 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
7798 sizeof (struct GNUNET_MESH_TunnelMessage)},
7799 {&handle_local_tunnel_speed, NULL,
7800 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
7801 sizeof (struct GNUNET_MESH_TunnelMessage)},
7802 {&handle_local_tunnel_buffer, NULL,
7803 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
7804 sizeof (struct GNUNET_MESH_TunnelMessage)},
7805 {&handle_local_tunnel_buffer, NULL,
7806 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
7807 sizeof (struct GNUNET_MESH_TunnelMessage)},
7808 {&handle_local_connect_add, NULL,
7809 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
7810 sizeof (struct GNUNET_MESH_PeerControl)},
7811 {&handle_local_connect_del, NULL,
7812 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
7813 sizeof (struct GNUNET_MESH_PeerControl)},
7814 {&handle_local_blacklist, NULL,
7815 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
7816 sizeof (struct GNUNET_MESH_PeerControl)},
7817 {&handle_local_unblacklist, NULL,
7818 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
7819 sizeof (struct GNUNET_MESH_PeerControl)},
7820 {&handle_local_connect_by_type, NULL,
7821 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
7822 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
7823 {&handle_local_connect_by_string, NULL,
7824 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
7825 {&handle_local_unicast, NULL,
7826 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
7827 {&handle_local_to_origin, NULL,
7828 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
7829 {&handle_local_multicast, NULL,
7830 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
7831 {&handle_local_ack, NULL,
7832 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
7833 sizeof (struct GNUNET_MESH_LocalAck)},
7839 * To be called on core init/fail.
7841 * @param cls service closure
7842 * @param server handle to the server for this service
7843 * @param identity the public identity of this peer
7846 core_init (void *cls, struct GNUNET_CORE_Handle *server,
7847 const struct GNUNET_PeerIdentity *identity)
7850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
7851 core_handle = server;
7852 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
7855 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
7856 GNUNET_SCHEDULER_shutdown (); // Try gracefully
7858 GNUNET_abort(); // Try harder
7865 * Method called whenever a given peer connects.
7867 * @param cls closure
7868 * @param peer peer identity this notification is about
7869 * @param atsi performance data for the connection
7870 * @param atsi_count number of records in 'atsi'
7873 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
7874 const struct GNUNET_ATS_Information *atsi,
7875 unsigned int atsi_count)
7877 struct MeshPeerInfo *peer_info;
7878 struct MeshPeerPath *path;
7880 DEBUG_CONN ("Peer connected\n");
7881 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
7882 peer_info = peer_info_get (peer);
7883 if (myid == peer_info->id)
7885 DEBUG_CONN (" (self)\n");
7890 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
7892 path = path_new (2);
7893 path->peers[0] = myid;
7894 path->peers[1] = peer_info->id;
7895 GNUNET_PEER_change_rc (myid, 1);
7896 GNUNET_PEER_change_rc (peer_info->id, 1);
7897 peer_info_add_path (peer_info, path, GNUNET_YES);
7898 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
7904 * Method called whenever a peer disconnects.
7906 * @param cls closure
7907 * @param peer peer identity this notification is about
7910 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
7912 struct MeshPeerInfo *pi;
7913 struct MeshPeerQueue *q;
7914 struct MeshPeerQueue *n;
7916 DEBUG_CONN ("Peer disconnected\n");
7917 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
7927 /* TODO try to reroute this traffic instead */
7928 queue_destroy(q, GNUNET_YES);
7931 if (NULL != pi->core_transmit)
7933 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
7934 pi->core_transmit = NULL;
7936 peer_info_remove_path (pi, pi->id, myid);
7939 DEBUG_CONN (" (self)\n");
7941 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
7946 /******************************************************************************/
7947 /************************ MAIN FUNCTIONS ****************************/
7948 /******************************************************************************/
7951 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
7953 * @param cls closure
7954 * @param key current key code
7955 * @param value value in the hash map
7956 * @return GNUNET_YES if we should continue to iterate,
7960 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
7962 struct MeshTunnel *t = value;
7969 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
7971 * @param cls closure
7972 * @param key current key code
7973 * @param value value in the hash map
7974 * @return GNUNET_YES if we should continue to iterate,
7978 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
7980 struct MeshPeerInfo *p = value;
7981 struct MeshPeerQueue *q;
7982 struct MeshPeerQueue *n;
7990 queue_destroy(q, GNUNET_YES);
7994 peer_info_destroy (p);
8000 * Task run during shutdown.
8006 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
8008 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
8010 if (core_handle != NULL)
8012 GNUNET_CORE_disconnect (core_handle);
8017 GNUNET_CRYPTO_rsa_key_create_stop (keygen);
8020 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
8021 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
8022 if (dht_handle != NULL)
8024 GNUNET_DHT_disconnect (dht_handle);
8029 GNUNET_SERVER_notification_context_destroy (nc);
8032 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
8034 GNUNET_SCHEDULER_cancel (announce_id_task);
8035 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
8037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
8042 * Callback for hostkey read/generation
8045 * @param pk the private key
8046 * @param emsg error message
8049 key_generation_cb (void *cls,
8050 struct GNUNET_CRYPTO_RsaPrivateKey *pk,
8053 struct MeshPeerInfo *peer;
8054 struct MeshPeerPath *p;
8059 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8060 _("Mesh service could not access hostkey. Exiting.\n"));
8061 GNUNET_SCHEDULER_shutdown ();
8064 my_private_key = pk;
8065 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
8066 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
8067 &my_full_id.hashPubKey);
8068 myid = GNUNET_PEER_intern (&my_full_id);
8069 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8070 "Mesh for peer [%s] starting\n",
8071 GNUNET_i2s(&my_full_id));
8073 // transport_handle = GNUNET_TRANSPORT_connect(c,
8083 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
8086 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
8087 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
8088 GNUNET_SERVER_disconnect_notify (server_handle,
8089 &handle_local_client_disconnect, NULL);
8093 clients_tail = NULL;
8096 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
8097 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
8099 /* Create a peer_info for the local peer */
8100 peer = peer_info_get (&my_full_id);
8103 GNUNET_PEER_change_rc (myid, 1);
8104 peer_info_add_path (peer, p, GNUNET_YES);
8105 GNUNET_SERVER_resume (server_handle);
8106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
8111 * Process mesh requests.
8113 * @param cls closure
8114 * @param server the initialized server
8115 * @param c configuration to use
8118 run (void *cls, struct GNUNET_SERVER_Handle *server,
8119 const struct GNUNET_CONFIGURATION_Handle *c)
8123 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
8124 server_handle = server;
8125 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
8126 NULL, /* Closure passed to MESH functions */
8127 &core_init, /* Call core_init once connected */
8128 &core_connect, /* Handle connects */
8129 &core_disconnect, /* remove peers on disconnects */
8130 NULL, /* Don't notify about all incoming messages */
8131 GNUNET_NO, /* For header only in notification */
8132 NULL, /* Don't notify about all outbound messages */
8133 GNUNET_NO, /* For header-only out notification */
8134 core_handlers); /* Register these handlers */
8136 if (core_handle == NULL)
8139 GNUNET_SCHEDULER_shutdown ();
8144 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
8147 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8149 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8151 GNUNET_SCHEDULER_shutdown ();
8156 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
8157 &refresh_path_time))
8159 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8161 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8162 "mesh", "refresh path time");
8163 GNUNET_SCHEDULER_shutdown ();
8168 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
8169 &app_announce_time))
8171 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8173 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8174 "mesh", "app announce time");
8175 GNUNET_SCHEDULER_shutdown ();
8180 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
8183 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8185 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8186 "mesh", "id announce time");
8187 GNUNET_SCHEDULER_shutdown ();
8195 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
8196 &unacknowledged_wait_time))
8198 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8200 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8201 "mesh", "unacknowledged wait time");
8202 GNUNET_SCHEDULER_shutdown ();
8207 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
8210 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8212 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8213 "mesh", "connect timeout");
8214 GNUNET_SCHEDULER_shutdown ();
8219 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
8222 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8224 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8225 "mesh", "max msgs queue");
8226 GNUNET_SCHEDULER_shutdown ();
8231 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
8234 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8236 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8237 "mesh", "max tunnels");
8238 GNUNET_SCHEDULER_shutdown ();
8243 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
8246 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8248 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8249 "mesh", "default ttl", 64);
8254 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
8255 &dht_replication_level))
8257 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8259 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8260 "mesh", "dht replication level", 10);
8261 dht_replication_level = 10;
8264 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8265 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8266 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8267 applications = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8268 types = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8270 dht_handle = GNUNET_DHT_connect (c, 64);
8271 if (NULL == dht_handle)
8275 stats = GNUNET_STATISTICS_create ("mesh", c);
8277 GNUNET_SERVER_suspend (server_handle);
8278 /* Scheduled the task to clean up when shutdown is called */
8279 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
8281 keygen = GNUNET_CRYPTO_rsa_key_create_start (keyfile, &key_generation_cb, NULL);
8282 GNUNET_free (keyfile);
8287 * The main function for the mesh service.
8289 * @param argc number of arguments from the command line
8290 * @param argv command line arguments
8291 * @return 0 ok, 1 on error
8294 main (int argc, char *const *argv)
8299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
8300 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
8302 ret = (GNUNET_OK == r) ? 0 : 1;
8303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
8307 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8308 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
8309 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);