2 This file is part of GNUnet.
3 (C) 2001 - 2011 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
40 * - add vs create? change vs. keep-alive? same msg or different ones? -- thinking...
42 * - relay corking down to core
43 * - set ttl relative to tree depth
44 * - Add data ACK count in path ACK
50 #include "mesh_protocol.h"
51 #include "mesh_tunnel_tree.h"
52 #include "block_mesh.h"
53 #include "mesh_block_lib.h"
54 #include "gnunet_dht_service.h"
55 #include "gnunet_statistics_service.h"
56 #include "gnunet_regex_lib.h"
58 #define MESH_BLOOM_SIZE 128
60 #define MESH_DEBUG_DHT GNUNET_YES
61 #define MESH_DEBUG_CONNECTION GNUNET_NO
63 #define INITIAL_WINDOW_SIZE 2
64 #define ACK_THRESHOLD INITIAL_WINDOW_SIZE / 2
66 #if MESH_DEBUG_CONNECTION
67 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
69 #define DEBUG_CONN(...)
73 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
75 #define DEBUG_DHT(...)
78 /******************************************************************************/
79 /************************ DATA STRUCTURES ****************************/
80 /******************************************************************************/
82 /** FWD declaration */
88 * Struct representing a piece of data being sent to other peers
92 /** Tunnel it belongs to. */
95 /** In case of a multicast, task to allow a client to send more data if
96 * some neighbor is too slow. */
97 GNUNET_SCHEDULER_TaskIdentifier *task;
99 /** How many remaining neighbors we need to send this to. */
100 unsigned int *reference_counter;
102 /** Size of the data. */
111 * Struct containing info about a queued transmission to this peer
118 struct MeshPeerQueue *next;
123 struct MeshPeerQueue *prev;
126 * Peer this transmission is directed to.
128 struct MeshPeerInfo *peer;
131 * Tunnel this message belongs to.
133 struct MeshTunnel *tunnel;
136 * Pointer to info stucture used as cls.
146 * Size of the message
153 * Struct containing all info possibly needed to build a package when called
156 struct MeshTransmissionDescriptor
158 /** ID of the tunnel this packet travels in */
159 struct MESH_TunnelID *origin;
161 /** Who was this message being sent to */
162 struct MeshPeerInfo *peer;
164 /** Ultimate destination of the packet */
165 GNUNET_PEER_Id destination;
167 /** Data descriptor */
168 struct MeshData* mesh_data;
173 * Struct containing all information regarding a given peer
183 * Last time we heard from this peer
185 struct GNUNET_TIME_Absolute last_contact;
188 * Number of attempts to reconnect so far
190 int n_reconnect_attempts;
193 * Paths to reach the peer, ordered by ascending hop count
195 struct MeshPeerPath *path_head;
198 * Paths to reach the peer, ordered by ascending hop count
200 struct MeshPeerPath *path_tail;
203 * Handle to stop the DHT search for a path to this peer
205 struct GNUNET_DHT_GetHandle *dhtget;
208 * Closure given to the DHT GET
210 struct MeshPathInfo *dhtgetcls;
213 * Array of tunnels this peer participates in
214 * (most probably a small amount, therefore not a hashmap)
215 * When the path to the peer changes, notify these tunnels to let them
216 * re-adjust their path trees.
218 struct MeshTunnel **tunnels;
221 * Number of tunnels this peers participates in
223 unsigned int ntunnels;
226 * Transmission queue to core DLL head
228 struct MeshPeerQueue *queue_head;
231 * Transmission queue to core DLL tail
233 struct MeshPeerQueue *queue_tail;
236 * How many messages are in the queue to this peer.
238 unsigned int queue_n;
241 * Handle to for queued transmissions
243 struct GNUNET_CORE_TransmitHandle *core_transmit;
248 * Globally unique tunnel identification (owner + number)
249 * DO NOT USE OVER THE NETWORK
254 * Node that owns the tunnel
259 * Tunnel number to differentiate all the tunnels owned by the node oid
260 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
262 MESH_TunnelNumber tid;
267 * Struct containing all information regarding a tunnel
268 * For an intermediate node the improtant info used will be:
269 * - id Tunnel unique identification
270 * - paths[0] To know where to send it next
271 * - metainfo: ready, speeds, accounting
278 struct MESH_TunnelID id;
281 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
283 MESH_TunnelNumber local_tid;
286 * Local tunnel number for local destination clients (incoming number)
287 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
290 MESH_TunnelNumber local_tid_dest;
293 * Is the speed on the tunnel limited to the slowest peer?
298 * Is the tunnel bufferless (minimum latency)?
303 * Packet ID of the last fwd packet seen (sent/retransmitted/received).
308 * Packet ID of the last bck packet sent (unique counter per hop).
313 * SKIP value for this tunnel.
318 * MeshTunnelChildInfo of all children, indexed by GNUNET_PEER_Id.
319 * Contains the Flow Control info: FWD ACK value received,
320 * last BCK ACK sent, PID and SKIP values.
322 struct GNUNET_CONTAINER_MultiHashMap *children_fc;
325 * Last ACK sent towards the origin (for traffic towards leaf node).
327 uint32_t last_fwd_ack;
330 * BCK ACK value received from the hop towards the owner of the tunnel,
331 * (previous node / owner): up to what message PID can we sent back to him.
336 * How many messages are in the forward queue (towards leaves).
338 unsigned int fwd_queue_n;
341 * How many messages do we accept in the forward queue.
343 unsigned int fwd_queue_max;
346 * How many messages are in the backward queue (towards origin).
348 unsigned int bck_queue_n;
351 * How many messages do we accept in the backward queue.
353 unsigned int bck_queue_max;
356 * Last time the tunnel was used
358 struct GNUNET_TIME_Absolute timestamp;
361 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
362 * containing peers added by id or by type, not intermediate peers.
364 struct GNUNET_CONTAINER_MultiHashMap *peers;
367 * Number of peers that are connected and potentially ready to receive data
369 unsigned int peers_ready;
372 * Number of peers that have been added to the tunnel
374 unsigned int peers_total;
377 * Client owner of the tunnel, if any
379 struct MeshClient *owner;
382 * Clients that have been informed about and want to stay in the tunnel.
384 struct MeshClient **clients;
387 * Flow control info for each client.
389 struct MeshTunnelClientInfo *clients_fc;
392 * Number of elements in clients/clients_fc
394 unsigned int nclients;
397 * Clients that have been informed but requested to leave the tunnel.
399 struct MeshClient **ignore;
402 * Number of elements in clients
404 unsigned int nignore;
409 GNUNET_PEER_Id *blacklisted;
412 * Number of elements in blacklisted
414 unsigned int nblacklisted;
417 * Bloomfilter (for peer identities) to stop circular routes
419 char bloomfilter[MESH_BLOOM_SIZE];
424 struct MeshTunnelTree *tree;
427 * Application type we are looking for in this tunnel
429 GNUNET_MESH_ApplicationType type;
432 * Used to search peers offering a service
434 struct GNUNET_DHT_GetHandle *dht_get_type;
437 * Initial context of the regex search for a connect_by_string
439 struct MeshRegexSearchContext *regex_ctx;
442 * Task to keep the used paths alive
444 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
447 * Task to destroy the tunnel after timeout
449 * FIXME: merge the two? a tunnel will have either
450 * a path refresh OR a timeout, never both!
452 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
455 * Flag to signal the destruction of the tunnel.
456 * If this is set GNUNET_YES the tunnel will be destroyed
457 * when the queue is empty.
464 * Info about a child node in a tunnel, needed to perform flow control.
466 struct MeshTunnelChildInfo
469 * ID of the child node.
484 * Maximum PID allowed (FWD ACK received).
489 * Last ACK sent to that child (BCK ACK).
496 * Info about a leaf client of a tunnel, needed to perform flow control.
498 struct MeshTunnelClientInfo
501 * PID of the last packet sent to the client (FWD).
506 * PID of the last packet received from the client (BCK).
511 * Maximum PID allowed (FWD ACK received).
516 * Last ACK sent to that child (BCK ACK).
524 * Info collected during iteration of child nodes in order to get the ACK value
527 struct MeshTunnelChildIteratorContext
530 * Tunnel whose info is being collected.
532 struct MeshTunnel *t;
535 * Is this context initialized? Is the value in max_child_ack valid?
540 * Maximum child ACK so far.
542 uint32_t max_child_ack;
545 * Number of children nodes
547 unsigned int nchildren;
552 * Info needed to work with tunnel paths and peers
559 struct MeshTunnel *t;
562 * Neighbouring peer to whom we send the packet to
564 struct MeshPeerInfo *peer;
569 struct MeshPeerPath *path;
574 * Struct containing information about a client of the service
581 struct MeshClient *next;
586 struct MeshClient *prev;
589 * Tunnels that belong to this client, indexed by local id
591 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
594 * Tunnels this client has accepted, indexed by incoming local id
596 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
599 * Tunnels this client has rejected, indexed by incoming local id
601 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
603 * Handle to communicate with the client
605 struct GNUNET_SERVER_Client *handle;
608 * Applications that this client has claimed to provide
610 struct GNUNET_CONTAINER_MultiHashMap *apps;
613 * Messages that this client has declared interest in
615 struct GNUNET_CONTAINER_MultiHashMap *types;
618 * Whether the client is active or shutting down (don't send confirmations
619 * to a client that is shutting down.
624 * ID of the client, mainly for debug messages
629 * Regular expressions describing the services offered by this client.
631 char **regexes; // FIXME add timeout? API to remove a regex?
634 * Number of regular expressions in regexes.
636 unsigned int n_regex;
639 * Task to refresh all regular expresions in the DHT.
641 GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
647 * Struct to keep information of searches of services described by a regex
648 * using a user-provided string service description.
650 struct MeshRegexSearchInfo
653 * Which tunnel is this for
655 struct MeshTunnel *t;
658 * User provided description of the searched service.
663 * Part of the description already consumed by the search.
670 struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
673 * Results from running DHT GETs.
675 struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
678 * Contexts, for each running DHT GET. Free all on end of search.
680 struct MeshRegexSearchContext **contexts;
683 * Number of contexts (branches/steps in search).
685 unsigned int n_contexts;
688 * Peer that is connecting via connect_by_string. When connected, free ctx.
693 * Other peers that are found but not yet being connected to.
695 GNUNET_PEER_Id *peers;
698 * Number of elements in peers.
700 unsigned int n_peers;
703 * Next peer to try to connect to.
708 * Timeout for a connect attempt.
709 * When reached, try to connect to a different peer, if any. If not,
710 * try the same peer again.
712 GNUNET_SCHEDULER_TaskIdentifier timeout;
717 * Struct to keep state of running searches that have consumed a part of
720 struct MeshRegexSearchContext
723 * Part of the description already consumed by
724 * this particular search branch.
729 * Information about the search.
731 struct MeshRegexSearchInfo *info;
735 /******************************************************************************/
736 /************************ DEBUG FUNCTIONS ****************************/
737 /******************************************************************************/
741 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
742 * @param cls string to print
743 * @param success GNUNET_OK if the PUT was transmitted,
744 * GNUNET_NO on timeout,
745 * GNUNET_SYSERR on disconnect from service
746 * after the PUT message was transmitted
747 * (so we don't know if it was received or not)
752 mesh_debug (void *cls, int success)
756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
762 /******************************************************************************/
763 /*********************** GLOBAL VARIABLES ****************************/
764 /******************************************************************************/
768 * Configuration parameters
770 static struct GNUNET_TIME_Relative refresh_path_time;
771 static struct GNUNET_TIME_Relative app_announce_time;
772 static struct GNUNET_TIME_Relative id_announce_time;
773 static struct GNUNET_TIME_Relative unacknowledged_wait_time;
774 static struct GNUNET_TIME_Relative connect_timeout;
775 static long long unsigned int default_ttl;
776 static long long unsigned int dht_replication_level;
777 static long long unsigned int max_tunnels;
778 static long long unsigned int max_msgs_queue;
781 * DLL with all the clients, head.
783 static struct MeshClient *clients;
786 * DLL with all the clients, tail.
788 static struct MeshClient *clients_tail;
791 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
793 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
796 * Number of tunnels known.
798 static unsigned long long n_tunnels;
801 * Tunnels incoming, indexed by MESH_TunnelNumber
802 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
804 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
807 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
809 static struct GNUNET_CONTAINER_MultiHashMap *peers;
812 * Handle to communicate with transport
814 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
817 * Handle to communicate with core.
819 static struct GNUNET_CORE_Handle *core_handle;
824 static struct GNUNET_DHT_Handle *dht_handle;
829 static struct GNUNET_SERVER_Handle *server_handle;
832 * Handle to the statistics service.
834 static struct GNUNET_STATISTICS_Handle *stats;
837 * Notification context, to send messages to local clients.
839 static struct GNUNET_SERVER_NotificationContext *nc;
842 * Local peer own ID (memory efficient handle).
844 static GNUNET_PEER_Id myid;
847 * Local peer own ID (full value).
849 static struct GNUNET_PeerIdentity my_full_id;
854 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
859 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
862 * Tunnel ID for the next created tunnel (global tunnel number).
864 static MESH_TunnelNumber next_tid;
867 * Tunnel ID for the next incoming tunnel (local tunnel number).
869 static MESH_TunnelNumber next_local_tid;
872 * All application types provided by this peer.
874 static struct GNUNET_CONTAINER_MultiHashMap *applications;
877 * All message types clients of this peer are interested in.
879 static struct GNUNET_CONTAINER_MultiHashMap *types;
882 * Task to periodically announce provided applications.
884 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
887 * Task to periodically announce itself in the network.
889 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
892 * Next ID to assign to a client.
894 unsigned int next_client_id;
897 /******************************************************************************/
898 /*********************** DECLARATIONS **************************/
899 /******************************************************************************/
901 /* FIXME move declarations here */
904 * Function to process paths received for a new peer addition. The recorded
905 * paths form the initial tunnel, which can be optimized later.
906 * Called on each result obtained for the DHT search.
909 * @param exp when will this value expire
910 * @param key key of the result
911 * @param type type of the result
912 * @param size number of bytes in data
913 * @param data pointer to the result data
916 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
917 const struct GNUNET_HashCode * key,
918 const struct GNUNET_PeerIdentity *get_path,
919 unsigned int get_path_length,
920 const struct GNUNET_PeerIdentity *put_path,
921 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
922 size_t size, const void *data);
926 * Function to process DHT string to regex matching.
927 * Called on each result obtained for the DHT search.
929 * @param cls closure (search context)
930 * @param exp when will this value expire
931 * @param key key of the result
932 * @param get_path path of the get request (not used)
933 * @param get_path_length lenght of get_path (not used)
934 * @param put_path path of the put request (not used)
935 * @param put_path_length length of the put_path (not used)
936 * @param type type of the result
937 * @param size number of bytes in data
938 * @param data pointer to the result data
940 * TODO: re-issue the request after certain time? cancel after X results?
943 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
944 const struct GNUNET_HashCode * key,
945 const struct GNUNET_PeerIdentity *get_path,
946 unsigned int get_path_length,
947 const struct GNUNET_PeerIdentity *put_path,
948 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
949 size_t size, const void *data);
953 * Function to process DHT string to regex matching.
954 * Called on each result obtained for the DHT search.
956 * @param cls closure (search context)
957 * @param exp when will this value expire
958 * @param key key of the result
959 * @param get_path path of the get request (not used)
960 * @param get_path_length lenght of get_path (not used)
961 * @param put_path path of the put request (not used)
962 * @param put_path_length length of the put_path (not used)
963 * @param type type of the result
964 * @param size number of bytes in data
965 * @param data pointer to the result data
968 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
969 const struct GNUNET_HashCode * key,
970 const struct GNUNET_PeerIdentity *get_path,
971 unsigned int get_path_length,
972 const struct GNUNET_PeerIdentity *put_path,
973 unsigned int put_path_length,
974 enum GNUNET_BLOCK_Type type,
975 size_t size, const void *data);
979 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
980 * and insert it in the appropiate structures if the peer is not known yet.
982 * @param peer Short identity of the peer.
984 * @return Existing or newly created peer info.
986 static struct MeshPeerInfo *
987 peer_info_get_short (const GNUNET_PEER_Id peer);
991 * Try to establish a new connection to this peer.
992 * Use the best path for the given tunnel.
993 * If the peer doesn't have any path to it yet, try to get one.
994 * If the peer already has some path, send a CREATE PATH towards it.
996 * @param peer PeerInfo of the peer.
997 * @param t Tunnel for which to create the path, if possible.
1000 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
1004 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1005 * needed rescources.
1006 * If peer already exists, reevaluate shortest path and change if different.
1008 * @param t Tunnel we want to add a new peer to
1009 * @param peer PeerInfo of the peer being added
1013 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
1017 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1018 * that are no longer needed, as well as nodes of no longer reachable peers.
1019 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1021 * @param t Tunnel from which to remove the path.
1022 * @param peer Short id of the peer which should be removed.
1025 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
1029 * Search for a tunnel by global ID using full PeerIdentities.
1031 * @param oid owner of the tunnel.
1032 * @param tid global tunnel number.
1034 * @return tunnel handler, NULL if doesn't exist.
1036 static struct MeshTunnel *
1037 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
1041 * Delete an active client from the tunnel.
1047 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
1050 * Notify a tunnel that a connection has broken that affects at least
1051 * some of its peers.
1053 * @param t Tunnel affected.
1054 * @param p1 Peer that got disconnected from p2.
1055 * @param p2 Peer that got disconnected from p1.
1057 * @return Short ID of the peer disconnected (either p1 or p2).
1058 * 0 if the tunnel remained unaffected.
1060 static GNUNET_PEER_Id
1061 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1066 * Get the current ack value for a tunnel, for data going from root to leaves,
1067 * taking in account the tunnel mode and the status of all children and clients.
1071 * @return Maximum PID allowed.
1074 tunnel_get_fwd_ack (struct MeshTunnel *t);
1077 * Get the current ack value for a tunnel, for data going from leaves to root,
1078 * taking in account the tunnel mode and the status of all children and clients.
1082 * @return Maximum PID allowed.
1085 tunnel_get_bck_ack (struct MeshTunnel *t);
1088 * Add a client to a tunnel, initializing all needed data structures.
1090 * @param t Tunnel to which add the client.
1091 * @param c Client which to add to the tunnel.
1094 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c);
1098 * Iterator over edges in a regex block retrieved from the DHT.
1100 * @param cls Closure.
1101 * @param token Token that follows to next state.
1102 * @param len Lenght of token.
1103 * @param key Hash of next state.
1105 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1108 regex_edge_iterator (void *cls,
1111 const struct GNUNET_HashCode *key);
1115 * Find a path to a peer that offers a regex servcie compatible
1116 * with a given string.
1118 * @param key The key of the accepting state.
1119 * @param ctx Context containing info about the string, tunnel, etc.
1122 regex_find_path (const struct GNUNET_HashCode *key,
1123 struct MeshRegexSearchContext *ctx);
1127 * Queue and pass message to core when possible.
1129 * @param cls Closure (type dependant).
1130 * @param type Type of the message, 0 for a raw message.
1131 * @param size Size of the message.
1132 * @param dst Neighbor to send message to.
1133 * @param t Tunnel this message belongs to.
1136 queue_add (void *cls, uint16_t type, size_t size,
1137 struct MeshPeerInfo *dst, struct MeshTunnel *t);
1140 * Free a transmission that was already queued with all resources
1141 * associated to the request.
1143 * @param queue Queue handler to cancel.
1144 * @param clear_cls Is it necessary to free associated cls?
1147 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1149 /******************************************************************************/
1150 /************************ ITERATORS ****************************/
1151 /******************************************************************************/
1154 * Iterator over found existing mesh regex blocks that match an ongoing search.
1156 * @param cls closure
1157 * @param key current key code
1158 * @param value value in the hash map
1159 * @return GNUNET_YES if we should continue to iterate,
1163 regex_result_iterator (void *cls,
1164 const struct GNUNET_HashCode * key,
1167 struct MeshRegexBlock *block = value;
1168 struct MeshRegexSearchContext *ctx = cls;
1170 if (GNUNET_YES == ntohl(block->accepting) &&
1171 ctx->position == strlen (ctx->info->description))
1173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
1174 regex_find_path (key, ctx);
1175 return GNUNET_YES; // We found an accept state!
1179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
1180 ctx->position, strlen(ctx->info->description),
1181 ntohl(block->accepting));
1184 (void) GNUNET_MESH_regex_block_iterate (block, SIZE_MAX,
1185 ®ex_edge_iterator, ctx);
1192 * Iterator over edges in a regex block retrieved from the DHT.
1194 * @param cls Closure (context of the search).
1195 * @param token Token that follows to next state.
1196 * @param len Lenght of token.
1197 * @param key Hash of next state.
1199 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1202 regex_edge_iterator (void *cls,
1205 const struct GNUNET_HashCode *key)
1207 struct MeshRegexSearchContext *ctx = cls;
1208 struct MeshRegexSearchContext *new_ctx;
1209 struct MeshRegexSearchInfo *info = ctx->info;
1210 struct GNUNET_DHT_GetHandle *get_h;
1214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
1215 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
1216 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
1217 current = &info->description[ctx->position];
1218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
1219 current_len = strlen (info->description) - ctx->position;
1220 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
1221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
1222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tk[0] : %c\n", token[0]);
1223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
1224 if (len > current_len)
1226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
1227 return GNUNET_YES; // Token too long, wont match
1229 if (0 != strncmp (current, token, len))
1231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
1232 return GNUNET_YES; // Token doesn't match
1234 new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
1235 new_ctx->info = info;
1236 new_ctx->position = ctx->position + len;
1237 GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
1239 GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, key))
1241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
1242 GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results, key,
1243 ®ex_result_iterator,
1245 return GNUNET_YES; // We are already looking for it
1247 /* Start search in DHT */
1249 GNUNET_DHT_get_start (dht_handle, /* handle */
1250 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
1251 key, /* key to search */
1252 dht_replication_level, /* replication level */
1253 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1254 NULL, /* xquery */ // FIXME BLOOMFILTER
1255 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1256 &dht_get_string_handler, new_ctx);
1258 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles, key, get_h,
1259 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
1269 * Iterator over hash map entries to cancel DHT GET requests after a
1270 * successful connect_by_string.
1272 * @param cls Closure (unused).
1273 * @param key Current key code (unused).
1274 * @param value Value in the hash map (get handle).
1275 * @return GNUNET_YES if we should continue to iterate,
1279 regex_cancel_dht_get (void *cls,
1280 const struct GNUNET_HashCode * key,
1283 struct GNUNET_DHT_GetHandle *h = value;
1285 GNUNET_DHT_get_stop (h);
1291 * Iterator over hash map entries to free MeshRegexBlocks stored during the
1292 * search for connect_by_string.
1294 * @param cls Closure (unused).
1295 * @param key Current key code (unused).
1296 * @param value MeshRegexBlock in the hash map.
1297 * @return GNUNET_YES if we should continue to iterate,
1301 regex_free_result (void *cls,
1302 const struct GNUNET_HashCode * key,
1306 GNUNET_free (value);
1312 * Regex callback iterator to store own service description in the DHT.
1314 * @param cls closure.
1315 * @param key hash for current state.
1316 * @param proof proof for current state.
1317 * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
1318 * @param num_edges number of edges leaving current state.
1319 * @param edges edges leaving current state.
1322 regex_iterator (void *cls, const struct GNUNET_HashCode *key, const char *proof,
1323 int accepting, unsigned int num_edges,
1324 const struct GNUNET_REGEX_Edge *edges)
1326 struct MeshRegexBlock *block;
1327 struct MeshRegexEdge *block_edge;
1328 enum GNUNET_DHT_RouteOption opt;
1332 unsigned int offset;
1335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1336 " regex dht put for state %s\n",
1338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1341 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1345 opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
1346 if (GNUNET_YES == accepting)
1348 struct MeshRegexAccept block;
1350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1351 " state %s is accepting, putting own id\n",
1353 size = sizeof (block);
1355 block.id = my_full_id;
1357 GNUNET_DHT_put(dht_handle, key,
1358 dht_replication_level,
1359 opt | GNUNET_DHT_RO_RECORD_ROUTE,
1360 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
1363 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1368 len = strlen(proof);
1369 size = sizeof (struct MeshRegexBlock) + len;
1370 block = GNUNET_malloc (size);
1373 block->n_proof = htonl (len);
1374 block->n_edges = htonl (num_edges);
1375 block->accepting = htonl (accepting);
1377 /* Store the proof at the end of the block. */
1378 aux = (char *) &block[1];
1379 memcpy (aux, proof, len);
1382 /* Store each edge in a variable length MeshEdge struct at the
1383 * very end of the MeshRegexBlock structure.
1385 for (i = 0; i < num_edges; i++)
1387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1388 " edge %s towards %s\n",
1390 GNUNET_h2s(&edges[i].destination));
1392 /* aux points at the end of the last block */
1393 len = strlen (edges[i].label);
1394 size += sizeof (struct MeshRegexEdge) + len;
1395 // Calculate offset FIXME is this ok? use size instead?
1396 offset = aux - (char *) block;
1397 block = GNUNET_realloc (block, size);
1398 aux = &((char *) block)[offset];
1399 block_edge = (struct MeshRegexEdge *) aux;
1400 block_edge->key = edges[i].destination;
1401 block_edge->n_token = htonl (len);
1402 aux = (char *) &block_edge[1];
1403 memcpy (aux, edges[i].label, len);
1407 GNUNET_DHT_put(dht_handle, key,
1408 dht_replication_level,
1410 GNUNET_BLOCK_TYPE_MESH_REGEX, size,
1412 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1416 GNUNET_free (block);
1421 * Store the regular expression describing a local service into the DHT.
1423 * @param regex The regular expresion.
1426 regex_put (const char *regex)
1428 struct GNUNET_REGEX_Automaton *dfa;
1430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) start\n", regex);
1431 dfa = GNUNET_REGEX_construct_dfa (regex, strlen(regex));
1432 GNUNET_REGEX_iterate_all_edges (dfa, ®ex_iterator, NULL);
1433 GNUNET_REGEX_automaton_destroy (dfa);
1434 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) end\n", regex);
1439 * Find a path to a peer that offers a regex servcie compatible
1440 * with a given string.
1442 * @param key The key of the accepting state.
1443 * @param ctx Context containing info about the string, tunnel, etc.
1446 regex_find_path (const struct GNUNET_HashCode *key,
1447 struct MeshRegexSearchContext *ctx)
1449 struct GNUNET_DHT_GetHandle *get_h;
1451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
1452 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
1453 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
1454 key, /* key to search */
1455 dht_replication_level, /* replication level */
1456 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE |
1457 GNUNET_DHT_RO_RECORD_ROUTE,
1458 NULL, /* xquery */ // FIXME BLOOMFILTER
1459 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1460 &dht_get_string_accept_handler, ctx);
1461 GNUNET_break (GNUNET_OK ==
1462 GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
1465 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1470 * Function called if the connect attempt to a peer found via
1471 * connect_by_string times out. Try to connect to another peer, if any.
1472 * Otherwise try to reconnect to the same peer.
1474 * @param cls Closure (info about regex search).
1475 * @param tc TaskContext.
1478 regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1480 struct MeshRegexSearchInfo *info = cls;
1481 struct MeshPeerInfo *peer_info;
1485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
1486 info->timeout = GNUNET_SCHEDULER_NO_TASK;
1487 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
1495 if (0 < info->n_peers)
1497 // Select next peer, put current in that spot.
1498 id = info->peers[info->i_peer];
1499 info->peers[info->i_peer] = info->peer;
1500 info->i_peer = (info->i_peer + 1) % info->n_peers;
1504 // Try to connect to same peer again.
1507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
1509 peer_info = peer_info_get_short(id);
1510 tunnel_add_peer (info->t, peer_info);
1512 tunnel_delete_peer (info->t, old);
1513 peer_info_connect (peer_info, info->t);
1514 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
1515 ®ex_connect_timeout,
1517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
1522 * Cancel an ongoing regex search in the DHT and free all resources.
1524 * @param ctx The search context.
1527 regex_cancel_search(struct MeshRegexSearchContext *ctx)
1529 struct MeshRegexSearchInfo *info = ctx->info;
1532 GNUNET_free (info->description);
1533 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
1534 ®ex_cancel_dht_get, NULL);
1535 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
1536 ®ex_free_result, NULL);
1537 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
1538 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
1539 info->t->regex_ctx = NULL;
1540 for (i = 0; i < info->n_contexts; i++)
1542 GNUNET_free (info->contexts[i]);
1544 if (0 < info->n_contexts)
1545 GNUNET_free (info->contexts);
1546 if (0 < info->n_peers)
1547 GNUNET_free (info->peers);
1548 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
1550 GNUNET_SCHEDULER_cancel(info->timeout);
1556 /******************************************************************************/
1557 /************************ PERIODIC FUNCTIONS ****************************/
1558 /******************************************************************************/
1561 * Announce iterator over for each application provided by the peer
1563 * @param cls closure
1564 * @param key current key code
1565 * @param value value in the hash map
1566 * @return GNUNET_YES if we should continue to
1571 announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
1573 struct PBlock block;
1574 struct MeshClient *c;
1576 block.id = my_full_id;
1577 c = GNUNET_CONTAINER_multihashmap_get (applications, key);
1578 block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
1579 if (0 == block.type)
1584 block.type = htonl (block.type);
1586 GNUNET_break (NULL !=
1587 GNUNET_DHT_put (dht_handle, key,
1588 dht_replication_level,
1589 GNUNET_DHT_RO_RECORD_ROUTE |
1590 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1591 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
1593 (const char *) &block,
1594 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1596 app_announce_time, NULL, NULL));
1602 * Periodically announce what applications are provided by local clients
1605 * @param cls closure
1606 * @param tc task context
1609 announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1611 struct MeshClient *c = cls;
1614 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1616 c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
1620 DEBUG_DHT ("Starting PUT for regex\n");
1622 for (i = 0; i < c->n_regex; i++)
1624 regex_put (c->regexes[i]);
1626 c->regex_announce_task =
1627 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_regex, cls);
1628 DEBUG_DHT ("Finished PUT for regex\n");
1635 * Periodically announce what applications are provided by local clients
1638 * @param cls closure
1639 * @param tc task context
1642 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1644 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1646 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
1650 DEBUG_DHT ("Starting PUT for apps\n");
1652 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
1654 announce_applications_task =
1655 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
1657 DEBUG_DHT ("Finished PUT for apps\n");
1664 * Periodically announce self id in the DHT
1666 * @param cls closure
1667 * @param tc task context
1670 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1672 struct PBlock block;
1674 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1676 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1680 * - Set data expiration in function of X
1681 * - Adapt X to churn
1683 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1685 block.id = my_full_id;
1686 block.type = htonl (0);
1687 GNUNET_DHT_put (dht_handle, /* DHT handle */
1688 &my_full_id.hashPubKey, /* Key to use */
1689 dht_replication_level, /* Replication level */
1690 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1691 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1692 sizeof (block), /* Size of the data */
1693 (const char *) &block, /* Data itself */
1694 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1695 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1696 NULL, /* Continuation */
1697 NULL); /* Continuation closure */
1699 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1703 /******************************************************************************/
1704 /****************** GENERAL HELPER FUNCTIONS ************************/
1705 /******************************************************************************/
1708 * Check if one pid is bigger than other, accounting for overflow.
1710 * @param bigger Argument that should be bigger.
1711 * @param smaller Argument that should be smaller.
1713 * @return True if bigger (arg1) has a higher value than smaller (arg 2).
1716 is_pid_bigger (uint32_t bigger, uint32_t smaller)
1718 return (GNUNET_YES == PID_OVERFLOW(smaller, bigger) ||
1719 (bigger > smaller && GNUNET_NO == PID_OVERFLOW(bigger, smaller)));
1723 * Get the higher ACK value out of two values, taking in account overflow.
1725 * @param a First ACK value.
1726 * @param b Second ACK value.
1728 * @return Highest ACK value from the two.
1731 max_pid (uint32_t a, uint32_t b)
1733 if (is_pid_bigger(a, b))
1740 * Get the lower ACK value out of two values, taking in account overflow.
1742 * @param a First ACK value.
1743 * @param b Second ACK value.
1745 * @return Lowest ACK value from the two.
1748 min_pid (uint32_t a, uint32_t b)
1750 if (is_pid_bigger(a, b))
1757 * Decrements the reference counter and frees all resources if needed
1759 * @param mesh_data Data Descriptor used in a multicast message.
1760 * Freed no longer needed (last message).
1763 data_descriptor_decrement_rc (struct MeshData *mesh_data)
1765 /* Make sure it's a multicast packet */
1766 GNUNET_assert (NULL != mesh_data->reference_counter);
1768 if (0 == --(*(mesh_data->reference_counter)))
1770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1771 if (NULL != mesh_data->task)
1773 if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
1775 GNUNET_SCHEDULER_cancel (*(mesh_data->task));
1776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client...\n");
1777 GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
1779 GNUNET_free (mesh_data->task);
1781 GNUNET_free (mesh_data->reference_counter);
1782 GNUNET_free (mesh_data->data);
1783 GNUNET_free (mesh_data);
1789 * Check if client has registered with the service and has not disconnected
1791 * @param client the client to check
1793 * @return non-NULL if client exists in the global DLL
1795 static struct MeshClient *
1796 client_get (struct GNUNET_SERVER_Client *client)
1798 struct MeshClient *c;
1803 if (c->handle == client)
1812 * Checks if a given client has subscribed to certain message type
1814 * @param message_type Type of message to check
1815 * @param c Client to check
1817 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1820 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1822 struct GNUNET_HashCode hc;
1824 if (NULL == c->types)
1826 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1827 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1832 * Allow a client to send more data after transmitting a multicast message
1833 * which some neighbor has not yet accepted altough a reasonable time has
1836 * @param cls Closure (DataDescriptor containing the task identifier)
1837 * @param tc Task Context
1839 * FIXME reference counter cshould be just int
1842 client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1844 struct MeshData *mdata = cls;
1846 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1848 GNUNET_assert (NULL != mdata->reference_counter);
1849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1850 "CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
1851 *(mdata->reference_counter));
1852 *(mdata->task) = GNUNET_SCHEDULER_NO_TASK;
1853 GNUNET_SERVER_receive_done (mdata->t->owner->handle, GNUNET_OK);
1858 * Check whether client wants traffic from a tunnel.
1860 * @param c Client to check.
1861 * @param t Tunnel to be found.
1863 * @return GNUNET_YES if client knows tunnel.
1865 * TODO look in client hashmap
1868 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1872 for (i = 0; i < t->nclients; i++)
1873 if (t->clients[i] == c)
1880 * Check whether client has been informed about a tunnel.
1882 * @param c Client to check.
1883 * @param t Tunnel to be found.
1885 * @return GNUNET_YES if client knows tunnel.
1887 * TODO look in client hashmap
1890 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1894 for (i = 0; i < t->nignore; i++)
1895 if (t->ignore[i] == c)
1897 return client_wants_tunnel(c, t);
1902 * Marks a client as uninterested in traffic from the tunnel, updating both
1903 * client and tunnel to reflect this.
1905 * @param c Client that doesn't want traffic anymore.
1906 * @param t Tunnel which should be ignored.
1908 * FIXME when to delete an incoming tunnel?
1911 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1913 struct GNUNET_HashCode hash;
1915 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1916 GNUNET_break (GNUNET_YES ==
1917 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1919 GNUNET_break (GNUNET_YES ==
1920 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
1921 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1922 tunnel_delete_active_client (t, c);
1923 GNUNET_array_append (t->ignore, t->nignore, c);
1928 * Deletes a tunnel from a client (either owner or destination). To be used on
1929 * tunnel destroy, otherwise, use client_ignore_tunnel.
1931 * @param c Client whose tunnel to delete.
1932 * @param t Tunnel which should be deleted.
1935 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1937 struct GNUNET_HashCode hash;
1941 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1942 GNUNET_assert (GNUNET_YES ==
1943 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
1949 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1951 GNUNET_assert (GNUNET_YES ==
1952 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1956 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
1964 * Send the message to all clients that have subscribed to its type
1966 * @param msg Pointer to the message itself
1967 * @param payload Pointer to the payload of the message.
1968 * @return number of clients this message was sent to
1971 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
1972 const struct GNUNET_MessageHeader *payload)
1974 struct GNUNET_PeerIdentity *oid;
1975 struct MeshClient *c;
1976 struct MeshTunnel *t;
1977 MESH_TunnelNumber *tid;
1980 char cbuf[htons (msg->size)];
1982 type = ntohs (payload->type);
1983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
1984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %u\n", type);
1986 memcpy (cbuf, msg, sizeof (cbuf));
1987 switch (htons (msg->type))
1989 struct GNUNET_MESH_Unicast *uc;
1990 struct GNUNET_MESH_Multicast *mc;
1991 struct GNUNET_MESH_ToOrigin *to;
1993 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1994 uc = (struct GNUNET_MESH_Unicast *) cbuf;
1998 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
1999 mc = (struct GNUNET_MESH_Multicast *) cbuf;
2003 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2004 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
2012 t = tunnel_get (oid, ntohl (*tid));
2019 for (count = 0, c = clients; c != NULL; c = c->next)
2021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
2022 if (client_is_subscribed (type, c))
2024 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
2028 *tid = htonl (t->local_tid);
2032 if (GNUNET_NO == client_knows_tunnel (c, t))
2034 /* This client doesn't know the tunnel */
2035 struct GNUNET_MESH_TunnelNotification tmsg;
2036 struct GNUNET_HashCode hash;
2038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
2039 tmsg.header.size = htons (sizeof (tmsg));
2040 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2041 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
2042 tmsg.tunnel_id = htonl (t->local_tid_dest);
2043 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2044 &tmsg.header, GNUNET_NO);
2045 tunnel_add_client (t, c);
2046 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2048 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2049 c->incoming_tunnels, &hash, t,
2050 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2052 *tid = htonl (t->local_tid_dest);
2055 /* Check if the client wants to get traffic from the tunnel */
2056 if (GNUNET_NO == client_wants_tunnel(c, t))
2059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
2060 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2061 (struct GNUNET_MessageHeader
2062 *) cbuf, GNUNET_NO);
2070 * Notify the client that owns the tunnel that a peer has connected to it
2071 * (the requested path to it has been confirmed).
2073 * @param t Tunnel whose owner to notify
2074 * @param id Short id of the peer that has connected
2077 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
2079 struct GNUNET_MESH_PeerControl pc;
2081 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2082 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2083 pc.tunnel_id = htonl (t->local_tid);
2084 GNUNET_PEER_resolve (id, &pc.peer);
2085 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
2091 * Notify a the client of a tunnel about how many more
2092 * payload packages will we accept on a given tunnel,
2093 * distinguishing between root and leaf clients.
2095 * @param c Client whom to send the ACK.
2096 * @param t Tunnel on which to send the ACK.
2099 send_client_tunnel_ack (struct MeshClient *c, struct MeshTunnel *t)
2101 struct GNUNET_MESH_LocalAck msg;
2102 MESH_TunnelNumber tid;
2105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2106 "Sending client ACK on tunnel %X\n",
2111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " to client %u\n", c->id);
2115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (owner, FWD ACK)\n");
2116 ack = tunnel_get_fwd_ack (t);
2121 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (leaf, BCK ACK)\n");
2122 ack = tunnel_get_bck_ack (t);
2123 tid = t->local_tid_dest;
2126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
2127 if (t->last_fwd_ack == ack)
2130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
2131 t->last_fwd_ack = ack;
2132 msg.header.size = htons (sizeof (msg));
2133 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
2134 msg.tunnel_id = htonl (tid);
2135 msg.max_pid = htonl (ack);
2137 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2138 &msg.header, GNUNET_NO);
2143 * Notify all clients (not depending on registration status) that the incoming
2144 * tunnel is no longer valid.
2146 * @param t Tunnel that was destroyed.
2149 send_clients_tunnel_destroy (struct MeshTunnel *t)
2151 struct GNUNET_MESH_TunnelMessage msg;
2153 msg.header.size = htons (sizeof (msg));
2154 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2155 msg.tunnel_id = htonl (t->local_tid_dest);
2156 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
2161 * Notify clients of tunnel disconnections, if needed.
2162 * In case the origin disconnects, the destination clients get a tunnel destroy
2163 * notification. If the last destination disconnects (only one remaining client
2164 * in tunnel), the origin gets a (local ID) peer disconnected.
2165 * Note that the function must be called BEFORE removing the client from
2168 * @param t Tunnel that was destroyed.
2169 * @param c Client that disconnected.
2172 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2178 struct GNUNET_MESH_TunnelMessage msg;
2180 msg.header.size = htons (sizeof (msg));
2181 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2182 msg.tunnel_id = htonl (t->local_tid_dest);
2183 for (i = 0; i < t->nclients; i++)
2184 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2185 &msg.header, GNUNET_NO);
2187 // FIXME when to disconnect an incoming tunnel?
2188 else if (1 == t->nclients && NULL != t->owner)
2190 struct GNUNET_MESH_PeerControl msg;
2192 msg.header.size = htons (sizeof (msg));
2193 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2194 msg.tunnel_id = htonl (t->local_tid);
2195 msg.peer = my_full_id;
2196 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2197 &msg.header, GNUNET_NO);
2203 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2204 * and insert it in the appropiate structures if the peer is not known yet.
2206 * @param peer Full identity of the peer.
2208 * @return Existing or newly created peer info.
2210 static struct MeshPeerInfo *
2211 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2213 struct MeshPeerInfo *peer_info;
2215 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2216 if (NULL == peer_info)
2219 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2220 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2221 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2222 peer_info->id = GNUNET_PEER_intern (peer);
2230 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2231 * and insert it in the appropiate structures if the peer is not known yet.
2233 * @param peer Short identity of the peer.
2235 * @return Existing or newly created peer info.
2237 static struct MeshPeerInfo *
2238 peer_info_get_short (const GNUNET_PEER_Id peer)
2240 struct GNUNET_PeerIdentity id;
2242 GNUNET_PEER_resolve (peer, &id);
2243 return peer_info_get (&id);
2248 * Iterator to remove the tunnel from the list of tunnels a peer participates
2251 * @param cls Closure (tunnel info)
2252 * @param key GNUNET_PeerIdentity of the peer (unused)
2253 * @param value PeerInfo of the peer
2255 * @return always GNUNET_YES, to keep iterating
2258 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2260 struct MeshTunnel *t = cls;
2261 struct MeshPeerInfo *peer = value;
2264 for (i = 0; i < peer->ntunnels; i++)
2267 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2270 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2271 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2280 * Core callback to write a pre-constructed data packet to core buffer
2282 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2283 * @param size Number of bytes available in buf.
2284 * @param buf Where the to write the message.
2286 * @return number of bytes written to buf
2289 send_core_data_raw (void *cls, size_t size, void *buf)
2291 struct MeshTransmissionDescriptor *info = cls;
2292 struct GNUNET_MessageHeader *msg;
2295 GNUNET_assert (NULL != info);
2296 GNUNET_assert (NULL != info->mesh_data);
2297 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2298 total_size = ntohs (msg->size);
2300 if (total_size > size)
2305 memcpy (buf, msg, total_size);
2306 data_descriptor_decrement_rc (info->mesh_data);
2313 * Sends an already built non-multicast message to a peer,
2314 * properly registrating all used resources.
2316 * @param message Message to send. Function makes a copy of it.
2317 * @param peer Short ID of the neighbor whom to send the message.
2318 * @param t Tunnel on which this message is transmitted.
2321 send_message (const struct GNUNET_MessageHeader *message,
2322 const struct GNUNET_PeerIdentity *peer,
2323 struct MeshTunnel *t)
2325 struct MeshTransmissionDescriptor *info;
2326 struct MeshPeerInfo *neighbor;
2327 struct MeshPeerPath *p;
2330 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2332 size = ntohs (message->size);
2333 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2334 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2335 info->mesh_data->data = GNUNET_malloc (size);
2336 memcpy (info->mesh_data->data, message, size);
2337 if (ntohs(message->type) == GNUNET_MESSAGE_TYPE_MESH_UNICAST)
2339 struct GNUNET_MESH_Unicast *m;
2341 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2342 m->ttl = htonl (ntohl (m->ttl) - 1);
2344 info->mesh_data->data_len = size;
2345 info->mesh_data->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2346 *info->mesh_data->reference_counter = 1;
2347 neighbor = peer_info_get (peer);
2348 for (p = neighbor->path_head; NULL != p; p = p->next)
2357 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2358 GNUNET_free (info->mesh_data->data);
2359 GNUNET_free (info->mesh_data);
2363 info->peer = neighbor;
2373 * Sends a CREATE PATH message for a path to a peer, properly registrating
2374 * all used resources.
2376 * @param peer PeerInfo of the final peer for whom this path is being created.
2377 * @param p Path itself.
2378 * @param t Tunnel for which the path is created.
2381 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2382 struct MeshTunnel *t)
2384 struct GNUNET_PeerIdentity id;
2385 struct MeshPathInfo *path_info;
2386 struct MeshPeerInfo *neighbor;
2392 p = tree_get_path_to_peer (t->tree, peer->id);
2399 for (i = 0; i < p->length; i++)
2401 if (p->peers[i] == myid)
2404 if (i >= p->length - 1)
2410 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2412 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2413 path_info->path = p;
2415 neighbor = peer_info_get (&id);
2416 path_info->peer = neighbor;
2417 queue_add (path_info,
2418 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2419 sizeof (struct GNUNET_MESH_ManipulatePath) +
2420 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2427 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2429 * @param t Tunnel whose path to destroy.
2430 * @param destination Short ID of the peer to whom the path to destroy.
2433 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2435 struct MeshPeerPath *p;
2438 p = tree_get_path_to_peer (t->tree, destination);
2444 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2445 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2447 struct GNUNET_MESH_ManipulatePath *msg;
2448 struct GNUNET_PeerIdentity *pi;
2452 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2453 msg->header.size = htons (size);
2454 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2455 msg->tid = htonl (t->id.tid);
2456 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2457 for (i = 0; i < p->length; i++)
2459 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2461 send_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2468 * Try to establish a new connection to this peer.
2469 * Use the best path for the given tunnel.
2470 * If the peer doesn't have any path to it yet, try to get one.
2471 * If the peer already has some path, send a CREATE PATH towards it.
2473 * @param peer PeerInfo of the peer.
2474 * @param t Tunnel for which to create the path, if possible.
2477 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2479 struct MeshPeerPath *p;
2480 struct MeshPathInfo *path_info;
2482 if (NULL != peer->path_head)
2484 p = tree_get_path_to_peer (t->tree, peer->id);
2491 // FIXME always send create path to self
2494 send_create_path (peer, p, t);
2498 struct GNUNET_HashCode hash;
2501 send_client_peer_connected (t, myid);
2502 t->local_tid_dest = next_local_tid++;
2503 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2506 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2507 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2514 else if (NULL == peer->dhtget)
2516 struct GNUNET_PeerIdentity id;
2518 GNUNET_PEER_resolve (peer->id, &id);
2519 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2520 path_info->peer = peer;
2522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2523 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2524 peer->dhtgetcls = path_info;
2525 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2526 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2527 &id.hashPubKey, /* key to search */
2528 dht_replication_level, /* replication level */
2529 GNUNET_DHT_RO_RECORD_ROUTE |
2530 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2531 NULL, /* xquery */ // FIXME BLOOMFILTER
2532 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2533 &dht_get_id_handler, path_info);
2535 /* Otherwise, there is no path but the DHT get is already started. */
2540 * Task to delay the connection of a peer
2542 * @param cls Closure (path info with tunnel and peer to connect).
2543 * Will be free'd on exection.
2544 * @param tc TaskContext
2547 peer_info_connect_task (void *cls,
2548 const struct GNUNET_SCHEDULER_TaskContext *tc)
2550 struct MeshPathInfo *path_info = cls;
2552 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2557 peer_info_connect (path_info->peer, path_info->t);
2563 * Destroy the peer_info and free any allocated resources linked to it
2565 * @param pi The peer_info to destroy.
2567 * @return GNUNET_OK on success
2570 peer_info_destroy (struct MeshPeerInfo *pi)
2572 struct GNUNET_PeerIdentity id;
2573 struct MeshPeerPath *p;
2574 struct MeshPeerPath *nextp;
2576 GNUNET_PEER_resolve (pi->id, &id);
2577 GNUNET_PEER_change_rc (pi->id, -1);
2580 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2583 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2584 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2586 if (NULL != pi->dhtget)
2588 GNUNET_DHT_get_stop (pi->dhtget);
2589 GNUNET_free (pi->dhtgetcls);
2595 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2605 * Remove all paths that rely on a direct connection between p1 and p2
2606 * from the peer itself and notify all tunnels about it.
2608 * @param peer PeerInfo of affected peer.
2609 * @param p1 GNUNET_PEER_Id of one peer.
2610 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2613 * TODO: optimize (see below)
2616 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2619 struct MeshPeerPath *p;
2620 struct MeshPeerPath *aux;
2621 struct MeshPeerInfo *peer_d;
2623 unsigned int destroyed;
2628 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2630 p = peer->path_head;
2634 for (i = 0; i < (p->length - 1); i++)
2636 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2637 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2639 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2650 for (i = 0; i < peer->ntunnels; i++)
2652 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2656 * Problem: one or more peers have been deleted from the tunnel tree.
2657 * We don't know who they are to try to add them again.
2658 * We need to try to find a new path for each of the disconnected peers.
2659 * Some of them might already have a path to reach them that does not
2660 * involve p1 and p2. Adding all anew might render in a better tree than
2661 * the trivial immediate fix.
2663 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2664 * its children will be reachable trough him.
2666 peer_d = peer_info_get_short (d);
2669 for (p = peer_d->path_head; NULL != p; p = p->next)
2671 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2679 /* No callback, as peer will be already disconnected and a connection
2680 * scheduled by tunnel_notify_connection_broken.
2682 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2686 peer_info_connect (peer_d, peer->tunnels[i]);
2689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2694 * Add the path to the peer and update the path used to reach it in case this
2697 * @param peer_info Destination peer to add the path to.
2698 * @param path New path to add. Last peer must be the peer in arg 1.
2699 * Path will be either used of freed if already known.
2700 * @param trusted Do we trust that this path is real?
2703 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2706 struct MeshPeerPath *aux;
2710 if ((NULL == peer_info) || (NULL == path))
2713 path_destroy (path);
2716 if (path->peers[path->length - 1] != peer_info->id)
2719 path_destroy (path);
2722 if (path->length <= 2 && GNUNET_NO == trusted)
2724 /* Only allow CORE to tell us about direct paths */
2725 path_destroy (path);
2728 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2729 for (l = 1; l < path->length; l++)
2731 if (path->peers[l] == myid)
2733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2734 for (l2 = 0; l2 < path->length - l; l2++)
2736 path->peers[l2] = path->peers[l + l2];
2741 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2746 struct GNUNET_PeerIdentity id;
2748 GNUNET_PEER_resolve (peer_info->id, &id);
2749 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2750 path->length, GNUNET_i2s (&id));
2753 l = path_get_length (path);
2760 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2761 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2763 l2 = path_get_length (aux);
2766 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2767 peer_info->path_tail, aux, path);
2772 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2774 path_destroy (path);
2779 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2786 * Add the path to the origin peer and update the path used to reach it in case
2787 * this is the shortest.
2788 * The path is given in peer_info -> destination, therefore we turn the path
2789 * upside down first.
2791 * @param peer_info Peer to add the path to, being the origin of the path.
2792 * @param path New path to add after being inversed.
2793 * @param trusted Do we trust that this path is real?
2796 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2797 struct MeshPeerPath *path, int trusted)
2800 peer_info_add_path (peer_info, path, trusted);
2805 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2806 * to obtain a local peer -> destination path and interning the peer ids.
2808 * @return Newly allocated and created path
2810 static struct MeshPeerPath *
2811 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2812 unsigned int get_path_length,
2813 const struct GNUNET_PeerIdentity *put_path,
2814 unsigned int put_path_length)
2816 struct MeshPeerPath *p;
2822 GNUNET_PEER_change_rc (myid, 1);
2823 i = get_path_length;
2824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2825 for (i--; i >= 0; i--)
2827 id = GNUNET_PEER_intern (&get_path[i]);
2828 if (p->length > 0 && id == p->peers[p->length - 1])
2830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2831 GNUNET_PEER_change_rc (id, -1);
2835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2836 GNUNET_i2s (&get_path[i]));
2838 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2839 p->peers[p->length - 1] = id;
2842 i = put_path_length;
2843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2844 for (i--; i >= 0; i--)
2846 id = GNUNET_PEER_intern (&put_path[i]);
2849 /* PUT path went through us, so discard the path up until now and start
2850 * from here to get a much shorter (and loop-free) path.
2855 if (p->length > 0 && id == p->peers[p->length - 1])
2857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2858 GNUNET_PEER_change_rc (id, -1);
2862 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2863 GNUNET_i2s (&put_path[i]));
2865 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2866 p->peers[p->length - 1] = id;
2870 if (get_path_length > 0)
2871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2872 GNUNET_i2s (&get_path[0]));
2873 if (put_path_length > 0)
2874 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2875 GNUNET_i2s (&put_path[0]));
2876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2878 for (i = 0; i < p->length; i++)
2880 struct GNUNET_PeerIdentity peer_id;
2882 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2884 GNUNET_i2s (&peer_id));
2892 * Adds a path to the peer_infos of all the peers in the path
2894 * @param p Path to process.
2895 * @param confirmed Whether we know if the path works or not.
2898 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2902 /* TODO: invert and add */
2903 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2904 for (i++; i < p->length; i++)
2906 struct MeshPeerInfo *aux;
2907 struct MeshPeerPath *copy;
2909 aux = peer_info_get_short (p->peers[i]);
2910 copy = path_duplicate (p);
2911 copy->length = i + 1;
2912 peer_info_add_path (aux, copy, GNUNET_NO);
2918 * Send keepalive packets for a peer
2920 * @param cls Closure (tunnel for which to send the keepalive).
2921 * @param tc Notification context.
2923 * TODO: implement explicit multicast keepalive?
2926 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2930 * Search for a tunnel among the incoming tunnels
2932 * @param tid the local id of the tunnel
2934 * @return tunnel handler, NULL if doesn't exist
2936 static struct MeshTunnel *
2937 tunnel_get_incoming (MESH_TunnelNumber tid)
2939 struct GNUNET_HashCode hash;
2941 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2942 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2943 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2948 * Search for a tunnel among the tunnels for a client
2950 * @param c the client whose tunnels to search in
2951 * @param tid the local id of the tunnel
2953 * @return tunnel handler, NULL if doesn't exist
2955 static struct MeshTunnel *
2956 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2958 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2960 return tunnel_get_incoming (tid);
2964 struct GNUNET_HashCode hash;
2966 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2967 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2973 * Search for a tunnel by global ID using PEER_ID
2975 * @param pi owner of the tunnel
2976 * @param tid global tunnel number
2978 * @return tunnel handler, NULL if doesn't exist
2980 static struct MeshTunnel *
2981 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2983 struct MESH_TunnelID id;
2984 struct GNUNET_HashCode hash;
2989 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2990 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2995 * Search for a tunnel by global ID using full PeerIdentities
2997 * @param oid owner of the tunnel
2998 * @param tid global tunnel number
3000 * @return tunnel handler, NULL if doesn't exist
3002 static struct MeshTunnel *
3003 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
3005 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
3010 * Delete an active client from the tunnel.
3016 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
3020 for (i = 0; i < t->nclients; i++)
3022 if (t->clients[i] == c)
3024 t->clients[i] = t->clients[t->nclients - 1];
3025 t->clients_fc[i] = t->clients_fc[t->nclients - 1];
3026 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
3028 GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
3036 * Delete an ignored client from the tunnel.
3042 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
3046 for (i = 0; i < t->nignore; i++)
3048 if (t->ignore[i] == c)
3050 t->ignore[i] = t->ignore[t->nignore - 1];
3051 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
3059 * Delete a client from the tunnel. It should be only done on
3060 * client disconnection, otherwise use client_ignore_tunnel.
3066 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
3068 tunnel_delete_ignored_client (t, c);
3069 tunnel_delete_active_client (t, c);
3074 * Iterator to free MeshTunnelChildInfo of tunnel children.
3076 * @param cls Closure (tunnel info).
3077 * @param key Hash of GNUNET_PEER_Id (unused).
3078 * @param value MeshTunnelChildInfo of the child.
3080 * @return always GNUNET_YES, to keep iterating
3083 tunnel_destroy_child (void *cls,
3084 const struct GNUNET_HashCode * key,
3087 GNUNET_free (value);
3093 * Callback used to notify a client owner of a tunnel that a peer has
3094 * disconnected, most likely because of a path change.
3096 * @param cls Closure (tunnel this notification is about).
3097 * @param peer_id Short ID of disconnected peer.
3100 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
3102 struct MeshTunnel *t = cls;
3103 struct MeshPeerInfo *peer;
3104 struct MeshPathInfo *path_info;
3106 if (NULL != t->owner && NULL != nc)
3108 struct GNUNET_MESH_PeerControl msg;
3110 msg.header.size = htons (sizeof (msg));
3111 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
3112 msg.tunnel_id = htonl (t->local_tid);
3113 GNUNET_PEER_resolve (peer_id, &msg.peer);
3114 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3115 &msg.header, GNUNET_NO);
3117 peer = peer_info_get_short (peer_id);
3118 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
3119 path_info->peer = peer;
3121 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
3126 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
3127 * needed rescources.
3128 * If peer already exists, reevaluate shortest path and change if different.
3130 * @param t Tunnel we want to add a new peer to
3131 * @param peer PeerInfo of the peer being added
3135 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
3137 struct GNUNET_PeerIdentity id;
3138 struct MeshPeerPath *best_p;
3139 struct MeshPeerPath *p;
3140 unsigned int best_cost;
3143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
3144 GNUNET_PEER_resolve (peer->id, &id);
3146 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
3149 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
3150 GNUNET_assert (GNUNET_OK ==
3151 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
3153 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3156 if (NULL != (p = peer->path_head))
3159 best_cost = tree_get_path_cost (t->tree, p);
3162 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
3169 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
3170 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
3171 t->path_refresh_task =
3172 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3176 /* Start a DHT get */
3177 peer_info_connect (peer, t);
3179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3183 * Add a path to a tunnel which we don't own, just to remember the next hop.
3184 * If destination node was already in the tunnel, the first hop information
3185 * will be replaced with the new path.
3187 * @param t Tunnel we want to add a new peer to
3188 * @param p Path to add
3189 * @param own_pos Position of local node in path.
3193 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3194 unsigned int own_pos)
3196 struct GNUNET_PeerIdentity id;
3198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3199 GNUNET_assert (0 != own_pos);
3200 tree_add_path (t->tree, p, NULL, NULL);
3201 if (own_pos < p->length - 1)
3203 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3204 tree_update_first_hops (t->tree, myid, &id);
3206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3210 * Add a client to a tunnel, initializing all needed data structures.
3212 * @param t Tunnel to which add the client.
3213 * @param c Client which to add to the tunnel.
3216 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
3218 struct MeshTunnelClientInfo clinfo;
3220 GNUNET_array_append (t->clients, t->nclients, c);
3221 clinfo.fwd_ack = t->fwd_pid + 1;
3222 clinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3223 clinfo.fwd_pid = t->fwd_pid;
3225 GNUNET_array_append (t->clients_fc, t->nclients, clinfo);
3230 * Notifies a tunnel that a connection has broken that affects at least
3231 * some of its peers. Sends a notification towards the root of the tree.
3232 * In case the peer is the owner of the tree, notifies the client that owns
3233 * the tunnel and tries to reconnect.
3235 * @param t Tunnel affected.
3236 * @param p1 Peer that got disconnected from p2.
3237 * @param p2 Peer that got disconnected from p1.
3239 * @return Short ID of the peer disconnected (either p1 or p2).
3240 * 0 if the tunnel remained unaffected.
3242 static GNUNET_PEER_Id
3243 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3249 tree_notify_connection_broken (t->tree, p1, p2,
3250 &tunnel_notify_client_peer_disconnected,
3252 if (myid != p1 && myid != p2)
3258 if (tree_get_predecessor (t->tree) != 0)
3260 /* We are the peer still connected, notify owner of the disconnection. */
3261 struct GNUNET_MESH_PathBroken msg;
3262 struct GNUNET_PeerIdentity neighbor;
3264 msg.header.size = htons (sizeof (msg));
3265 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3266 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3267 msg.tid = htonl (t->id.tid);
3268 msg.peer1 = my_full_id;
3269 GNUNET_PEER_resolve (pid, &msg.peer2);
3270 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3271 send_message (&msg.header, &neighbor, t);
3279 * Send a multicast packet to a neighbor.
3281 * @param cls Closure (Info about the multicast packet)
3282 * @param neighbor_id Short ID of the neighbor to send the packet to.
3285 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3287 struct MeshData *mdata = cls;
3288 struct MeshTransmissionDescriptor *info;
3289 struct GNUNET_PeerIdentity neighbor;
3291 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3293 info->mesh_data = mdata;
3294 (*(mdata->reference_counter)) ++;
3295 info->destination = neighbor_id;
3296 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3298 GNUNET_i2s (&neighbor));
3299 info->peer = peer_info_get (&neighbor);
3300 GNUNET_assert (NULL != info->peer);
3302 GNUNET_MESSAGE_TYPE_MESH_MULTICAST,
3303 info->mesh_data->data_len,
3310 * Send a message in a tunnel in multicast, sending a copy to each child node
3311 * down the local one in the tunnel tree.
3313 * @param t Tunnel in which to send the data.
3314 * @param msg Message to be sent.
3315 * @param internal Has the service generated this message?
3318 tunnel_send_multicast (struct MeshTunnel *t,
3319 const struct GNUNET_MessageHeader *msg,
3322 struct MeshData *mdata;
3324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3325 " sending a multicast packet...\n");
3326 mdata = GNUNET_malloc (sizeof (struct MeshData));
3327 mdata->data_len = ntohs (msg->size);
3328 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
3330 mdata->data = GNUNET_malloc (mdata->data_len);
3331 memcpy (mdata->data, msg, mdata->data_len);
3332 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3334 struct GNUNET_MESH_Multicast *mcast;
3336 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3337 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3339 ntohl (mcast->ttl));
3343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3345 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
3346 && GNUNET_NO == internal)
3348 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
3350 GNUNET_SCHEDULER_add_delayed (unacknowledged_wait_time, &client_allow_send,
3352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
3356 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3357 if (*(mdata->reference_counter) == 0)
3359 GNUNET_free (mdata->data);
3360 GNUNET_free (mdata->reference_counter);
3361 if (NULL != mdata->task)
3363 GNUNET_SCHEDULER_cancel(*(mdata->task));
3364 GNUNET_free (mdata->task);
3365 GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
3367 // FIXME change order?
3368 GNUNET_free (mdata);
3370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3371 " sending a multicast packet done\n");
3377 * Increase the SKIP value of all peers that
3378 * have not received a unicast message.
3380 * @param cls Closure (ID of the peer that HAS received the message).
3381 * @param key ID of the neighbor.
3382 * @param value Information about the neighbor.
3384 * @return GNUNET_YES to keep iterating.
3387 tunnel_add_skip (void *cls,
3388 const struct GNUNET_HashCode * key,
3391 struct GNUNET_PeerIdentity *neighbor = cls;
3392 struct MeshTunnelChildInfo *cinfo = value;
3394 /* TODO compare only pointers? key == neighbor? */
3395 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3405 * @brief Get neighbor's Flow Control information.
3407 * Retrieves the MeshTunnelChildInfo containing Flow Control data about a direct
3408 * descendant of the local node in a certain tunnel.
3409 * If the info is not yet there (recently created path), creates the data struct
3410 * and inserts it into the tunnel info, initialized to the current tunnel ACK
3413 * @param t Tunnel related.
3414 * @param peer Neighbor whose Flow Control info is needed.
3416 * @return Neighbor's Flow Control info.
3418 static struct MeshTunnelChildInfo *
3419 tunnel_get_neighbor_fc (const struct MeshTunnel *t,
3420 const struct GNUNET_PeerIdentity *peer)
3422 struct MeshTunnelChildInfo *cinfo;
3423 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3427 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3428 cinfo->id = GNUNET_PEER_intern (peer);
3429 cinfo->skip = t->fwd_pid;
3430 cinfo->fwd_ack = t->fwd_pid + t->fwd_queue_max - t->fwd_queue_n; // FIXME review
3432 GNUNET_assert (GNUNET_OK ==
3433 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
3436 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3443 * Iterator to get the appropiate ACK value from all children nodes.
3445 * @param cls Closue (tunnel).
3446 * @param id Id of the child node.
3449 tunnel_get_child_fwd_ack (void *cls,
3452 struct GNUNET_PeerIdentity peer_id;
3453 struct MeshTunnelChildInfo *cinfo;
3454 struct MeshTunnelChildIteratorContext *ctx = cls;
3455 struct MeshTunnel *t = ctx->t;
3458 GNUNET_PEER_resolve (id, &peer_id);
3459 cinfo = tunnel_get_neighbor_fc (t, &peer_id);
3460 ack = cinfo->fwd_ack;
3462 if (GNUNET_NO == ctx->init)
3464 ctx->max_child_ack = ack;
3465 ctx->init = GNUNET_YES;
3468 if (GNUNET_YES == t->speed_min)
3470 ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
3474 ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
3481 * Get the maximum PID allowed to transmit to any
3482 * tunnel child of the local peer, depending on the tunnel
3483 * buffering/speed settings.
3487 * @return Maximum PID allowed (uint32 MAX), -1 if node has no children.
3490 tunnel_get_children_fwd_ack (struct MeshTunnel *t)
3492 struct MeshTunnelChildIteratorContext ctx;
3494 ctx.max_child_ack = 0;
3496 tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
3498 if (0 == ctx.nchildren)
3501 if (GNUNET_YES == t->nobuffer && is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
3502 ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
3504 return (int64_t) ctx.max_child_ack;
3509 * Set the FWD ACK value of a client in a particular tunnel.
3511 * @param t Tunnel affected.
3512 * @param c Client whose ACK to set.
3513 * @param ack ACK value.
3516 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
3517 struct MeshClient *c,
3522 for (i = 0; i < t->nclients; i++)
3524 if (t->clients[i] != c)
3526 t->clients_fc[i].fwd_ack = ack;
3534 * Get the ACK value of a client in a particular tunnel.
3536 * @param t Tunnel on which to look.
3537 * @param c Client whose ACK to get.
3539 * @return ACK value.
3541 uint32_t // FIXME fc Is this funcion needed anymore?
3542 tunnel_get_client_fwd_ack (struct MeshTunnel *t,
3543 struct MeshClient *c)
3547 for (i = 0; i < t->nclients; i++)
3549 if (t->clients[i] != c)
3551 return t->clients_fc[i].fwd_ack;
3559 * Get the highest ACK value of all clients in a particular tunnel,
3560 * according to the buffering/speed settings.
3562 * @param t Tunnel on which to look.
3564 * @return Corresponding ACK value (max uint32_t).
3565 * If no clients are suscribed, -1.
3568 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
3573 if (0 == t->nclients)
3576 for (ack = -1, i = 0; i < t->nclients; i++)
3579 (GNUNET_YES == t->speed_min &&
3580 GNUNET_YES == is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
3581 (GNUNET_NO == t->speed_min &&
3582 GNUNET_YES == is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
3584 ack = t->clients_fc[i].fwd_ack;
3588 if (GNUNET_YES == t->nobuffer && is_pid_bigger(ack, t->fwd_pid))
3589 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
3591 return (uint32_t) ack;
3596 * Get the current fwd ack value for a tunnel, taking in account the tunnel
3597 * mode and the status of all children nodes.
3601 * @return Maximum PID allowed.
3604 tunnel_get_fwd_ack (struct MeshTunnel *t)
3607 uint32_t buffer_free;
3612 count = t->fwd_pid - t->skip;
3613 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
3614 ack = count + buffer_free; // Might overflow 32 bits, it's ok!
3615 child_ack = tunnel_get_children_fwd_ack (t);
3616 client_ack = tunnel_get_clients_fwd_ack (t);
3617 if (-1 == child_ack)
3619 // Node has no children, child_ack AND core buffer are irrelevant.
3620 GNUNET_break (-1 != client_ack); // No children AND no clients? Not good!
3621 return (uint32_t) client_ack;
3624 if (GNUNET_YES == t->speed_min)
3626 ack = min_pid ((uint32_t) child_ack, ack);
3627 ack = min_pid ((uint32_t) client_ack, ack);
3631 ack = max_pid ((uint32_t) child_ack, ack);
3632 ack = max_pid ((uint32_t) client_ack, ack);
3634 if (GNUNET_YES == t->nobuffer && is_pid_bigger(ack, t->fwd_pid))
3635 ack = t->fwd_pid + 1; // Might overflow 32 bits, it's ok!
3636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "c %u, bf %u, ch %u, cl %u, ACK: %u\n",
3637 count, buffer_free, child_ack, client_ack, ack);
3642 * Get the current bck ack value for a tunnel, taking in account the tunnel
3643 * mode and the status of all children nodes.
3647 * @return Maximum PID allowed.
3650 tunnel_get_bck_ack (struct MeshTunnel *t)
3654 if (GNUNET_YES == t->nobuffer)
3656 if (t->bck_ack > t->bck_pid)
3658 return t->bck_pid + 1;
3665 ack = t->bck_pid + t->bck_queue_max - t->bck_queue_n;
3672 send_local_ack (struct MeshClient *c, struct MeshTunnel *t, uint32_t ack)
3674 struct GNUNET_MESH_LocalAck msg;
3676 msg.header.size = htons (sizeof (msg));
3677 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
3678 msg.tunnel_id = htonl (t->local_tid_dest);
3679 msg.max_pid = htonl (ack);
3680 GNUNET_SERVER_notification_context_unicast(nc,
3687 * Build an ACK message and send it to the given peer.
3690 send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
3692 struct GNUNET_MESH_ACK msg;
3694 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3695 msg.header.size = htons (sizeof (msg));
3696 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3697 msg.pid = htonl (ack);
3698 msg.tid = htonl (t->id.tid);
3700 send_message (&msg.header, peer, t);
3705 * Send an ACK informing the predecessor about the available buffer space.
3706 * In case there is no predecessor, inform the owning client.
3707 * If buffering is off, send only on behalf of children or self if endpoint.
3708 * If buffering is on, send when sent to children and buffer space is free.
3709 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
3710 * the ACK itself goes "back" (towards root).
3712 * @param t Tunnel on which to send the ACK.
3713 * @param type Type of message that triggered the ACK transmission.
3716 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
3718 struct GNUNET_PeerIdentity id;
3721 if (NULL != t->owner)
3723 send_client_tunnel_ack (t->owner, t);
3726 /* Is it after unicast / multicast retransmission? */
3729 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3730 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3732 "ACK due to FWD DATA retransmission\n");
3733 if (GNUNET_YES == t->nobuffer)
3735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3738 if (t->fwd_queue_max > t->fwd_queue_n * 2)
3740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3744 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3745 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3751 /* Ok, ACK might be necessary, what PID to ACK? */
3752 ack = tunnel_get_fwd_ack (t);
3754 /* If speed_min and not all children have ack'd, dont send yet */
3755 if (ack == t->last_fwd_ack)
3757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
3761 t->last_fwd_ack = ack;
3762 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3763 send_ack (t, &id, ack);
3768 * Iterator to send a child node a BCK ACK to allow him to send more
3771 * @param cls Closure (tunnel).
3772 * @param id Id of the child node.
3775 tunnel_send_child_bck_ack (void *cls,
3778 struct MeshTunnel *t = cls;
3779 struct MeshTunnelChildInfo *cinfo;
3780 struct GNUNET_PeerIdentity peer;
3782 GNUNET_PEER_resolve (id, &peer);
3783 cinfo = tunnel_get_neighbor_fc (t, &peer);
3785 if (cinfo->bck_ack != cinfo->pid &&
3786 GNUNET_NO == is_pid_bigger (cinfo->bck_ack, cinfo->pid))
3790 send_ack (t, &peer, cinfo->bck_ack);
3795 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
3797 * Iterates over all clients and sends BCK ACKs to the ones that need it.
3799 * @param t Tunnel on which to send the BCK ACKs.
3802 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
3806 /* Find client whom to allow to send to origin (with lowest buffer space) */
3807 for (i = 0; i < t->nclients; i++)
3809 struct MeshTunnelClientInfo *clinfo;
3812 clinfo = &t->clients_fc[i];
3813 delta = clinfo->bck_ack - clinfo->bck_pid;
3815 if ((GNUNET_NO == t->nobuffer && ACK_THRESHOLD > delta) ||
3816 (GNUNET_YES == t->nobuffer && 0 == delta))
3820 ack = clinfo->bck_pid;
3821 ack += t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3822 send_local_ack(t->clients[i], t, ack);
3823 clinfo->bck_ack = ack;
3830 * Send an ACK informing the children nodes and destination clients about
3831 * the available buffer space.
3832 * If buffering is off, send only on behalf of root (can be self).
3833 * If buffering is on, send when sent to predecessor and buffer space is free.
3834 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
3835 * the ACK itself goes "forward" (towards children/clients).
3837 * @param t Tunnel on which to send the ACK.
3838 * @param type Type of message that triggered the ACK transmission.
3841 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
3843 if (NULL != t->owner)
3845 send_client_tunnel_ack (t->owner, t);
3848 /* Is it after data to_origin retransmission? */
3851 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3853 "ACK due to BCK DATA retransmission\n");
3854 if (GNUNET_YES == t->nobuffer)
3856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3859 if (t->bck_queue_max > t->bck_queue_n * 2)
3861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3865 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3866 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3872 tunnel_send_clients_bck_ack (t);
3873 tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, NULL);
3878 * Send a message to all peers in this tunnel that the tunnel is no longer
3881 * @param t The tunnel whose peers to notify.
3884 tunnel_send_destroy (struct MeshTunnel *t)
3886 struct GNUNET_MESH_TunnelDestroy msg;
3888 msg.header.size = htons (sizeof (msg));
3889 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3890 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3891 msg.tid = htonl (t->id.tid);
3892 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
3897 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
3899 * @param cls Closure (Tunnel which to cancel).
3900 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
3903 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
3905 struct MeshTunnel *t = cls;
3906 struct MeshPeerInfo *peer_info;
3907 struct MeshPeerQueue *pq;
3908 struct MeshPeerQueue *next;
3910 peer_info = peer_info_get_short (neighbor_id);
3911 for (pq = peer_info->queue_head; NULL != pq; pq = next)
3914 if (pq->tunnel == t)
3916 queue_destroy (pq, GNUNET_YES);
3919 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
3921 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
3922 peer_info->core_transmit = NULL;
3927 * Destroy the tunnel and free any allocated resources linked to it.
3929 * @param t the tunnel to destroy
3931 * @return GNUNET_OK on success
3934 tunnel_destroy (struct MeshTunnel *t)
3936 struct MeshClient *c;
3937 struct GNUNET_HashCode hash;
3944 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
3950 struct GNUNET_PeerIdentity id;
3952 GNUNET_PEER_resolve (t->id.oid, &id);
3953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3954 GNUNET_i2s (&id), t->id.tid);
3956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3960 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3961 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3966 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3969 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
3973 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
3974 for (i = 0; i < t->nclients; i++)
3978 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
3983 for (i = 0; i < t->nignore; i++)
3987 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
3992 if (t->nclients > 0)
3995 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
3999 GNUNET_free (t->clients);
4001 if (NULL != t->peers)
4003 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
4005 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
4008 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4009 &tunnel_destroy_child,
4011 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
4013 tree_destroy (t->tree);
4015 if (NULL != t->regex_ctx)
4016 regex_cancel_search (t->regex_ctx);
4017 if (NULL != t->dht_get_type)
4018 GNUNET_DHT_get_stop (t->dht_get_type);
4019 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4020 GNUNET_SCHEDULER_cancel (t->timeout_task);
4021 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
4022 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
4025 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
4026 GNUNET_assert (0 <= n_tunnels);
4033 * Create a new tunnel
4035 * @param owner Who is the owner of the tunnel (short ID).
4036 * @param tid Tunnel Number of the tunnel.
4037 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
4038 * @param local Tunnel Number for the tunnel, for the client point of view.
4040 * @return A new initialized tunnel. NULL on error.
4042 static struct MeshTunnel *
4043 tunnel_new (GNUNET_PEER_Id owner,
4044 MESH_TunnelNumber tid,
4045 struct MeshClient *client,
4046 MESH_TunnelNumber local)
4048 struct MeshTunnel *t;
4049 struct GNUNET_HashCode hash;
4051 if (n_tunnels >= max_tunnels && NULL == client)
4054 t = GNUNET_malloc (sizeof (struct MeshTunnel));
4057 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
4058 t->bck_queue_max = t->fwd_queue_max;
4059 t->tree = tree_new (owner);
4061 t->bck_ack = INITIAL_WINDOW_SIZE;
4062 t->last_fwd_ack = INITIAL_WINDOW_SIZE;
4063 t->local_tid = local;
4064 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8);
4066 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
4068 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4070 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
4071 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4078 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4085 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4087 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
4088 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4092 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4102 * Removes an explicit path from a tunnel, freeing all intermediate nodes
4103 * that are no longer needed, as well as nodes of no longer reachable peers.
4104 * The tunnel itself is also destoyed if results in a remote empty tunnel.
4106 * @param t Tunnel from which to remove the path.
4107 * @param peer Short id of the peer which should be removed.
4110 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
4112 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
4118 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
4119 * client when the client disconnects. If the client is not the owner, the
4120 * owner will get notified if no more clients are in the tunnel and the client
4121 * get removed from the tunnel's list.
4123 * @param cls closure (client that is disconnecting)
4124 * @param key the hash of the local tunnel id (used to access the hashmap)
4125 * @param value the value stored at the key (tunnel to destroy)
4127 * @return GNUNET_OK on success
4130 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
4132 struct MeshTunnel *t = value;
4133 struct MeshClient *c = cls;
4136 send_client_tunnel_disconnect(t, c);
4139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4140 "Client %u is destination, keeping the tunnel alive.\n", c->id);
4141 tunnel_delete_client(t, c);
4142 client_delete_tunnel(c, t);
4145 tunnel_send_destroy(t);
4146 r = tunnel_destroy (t);
4152 * Timeout function, destroys tunnel if called
4154 * @param cls Closure (tunnel to destroy).
4155 * @param tc TaskContext
4158 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4160 struct MeshTunnel *t = cls;
4162 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4164 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4169 * Resets the tunnel timeout. Starts it if no timeout was running.
4171 * @param t Tunnel whose timeout to reset.
4173 * TODO use heap to improve efficiency of scheduler.
4176 tunnel_reset_timeout (struct MeshTunnel *t)
4178 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4179 GNUNET_SCHEDULER_cancel (t->timeout_task);
4181 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
4182 (refresh_path_time, 4), &tunnel_timeout, t);
4186 /******************************************************************************/
4187 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4188 /******************************************************************************/
4191 * Function to send a create path packet to a peer.
4193 * @param cls closure
4194 * @param size number of bytes available in buf
4195 * @param buf where the callee should write the message
4196 * @return number of bytes written to buf
4199 send_core_path_create (void *cls, size_t size, void *buf)
4201 struct MeshPathInfo *info = cls;
4202 struct GNUNET_MESH_ManipulatePath *msg;
4203 struct GNUNET_PeerIdentity *peer_ptr;
4204 struct MeshTunnel *t = info->t;
4205 struct MeshPeerPath *p = info->path;
4210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
4212 sizeof (struct GNUNET_MESH_ManipulatePath) +
4213 p->length * sizeof (struct GNUNET_PeerIdentity);
4215 if (size < size_needed || NULL == buf)
4220 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
4221 msg->header.size = htons (size_needed);
4222 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
4223 msg->tid = ntohl (t->id.tid);
4225 if (GNUNET_YES == t->speed_min)
4226 opt = MESH_TUNNEL_OPT_SPEED_MIN;
4227 if (GNUNET_YES == t->nobuffer)
4228 opt |= MESH_TUNNEL_OPT_NOBUFFER;
4229 msg->opt = htonl(opt);
4231 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
4232 for (i = 0; i < p->length; i++)
4234 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
4240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4241 "CREATE PATH (%u bytes long) sent!\n", size_needed);
4247 * Fill the core buffer
4249 * @param cls closure (data itself)
4250 * @param size number of bytes available in buf
4251 * @param buf where the callee should write the message
4253 * @return number of bytes written to buf
4256 send_core_data_multicast (void *cls, size_t size, void *buf)
4258 struct MeshTransmissionDescriptor *info = cls;
4261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
4262 GNUNET_assert (NULL != info);
4263 GNUNET_assert (NULL != info->peer);
4264 total_size = info->mesh_data->data_len;
4265 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
4267 if (total_size > size)
4272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
4273 memcpy (buf, info->mesh_data->data, total_size);
4276 struct GNUNET_MESH_Multicast *mc;
4277 struct GNUNET_MessageHeader *mh;
4280 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
4282 mc = (struct GNUNET_MESH_Multicast *) mh;
4283 mh = (struct GNUNET_MessageHeader *) &mc[1];
4284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4285 " multicast, payload type %u\n", ntohs (mh->type));
4286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4287 " multicast, payload size %u\n", ntohs (mh->size));
4291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %u\n",
4296 data_descriptor_decrement_rc (info->mesh_data);
4297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
4299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
4305 * Creates a path ack message in buf and frees all unused resources.
4307 * @param cls closure (MeshTransmissionDescriptor)
4308 * @param size number of bytes available in buf
4309 * @param buf where the callee should write the message
4310 * @return number of bytes written to buf
4313 send_core_path_ack (void *cls, size_t size, void *buf)
4315 struct MeshTransmissionDescriptor *info = cls;
4316 struct GNUNET_MESH_PathACK *msg = buf;
4318 GNUNET_assert (NULL != info);
4319 if (sizeof (struct GNUNET_MESH_PathACK) > size)
4324 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
4325 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
4326 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
4327 msg->tid = htonl (info->origin->tid);
4328 msg->peer_id = my_full_id;
4331 /* TODO add signature */
4333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
4334 return sizeof (struct GNUNET_MESH_PathACK);
4339 * Free a transmission that was already queued with all resources
4340 * associated to the request.
4342 * @param queue Queue handler to cancel.
4343 * @param clear_cls Is it necessary to free associated cls?
4346 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4348 struct MeshTransmissionDescriptor *dd;
4349 struct MeshPathInfo *path_info;
4351 if (GNUNET_YES == clear_cls)
4353 switch (queue->type)
4355 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4356 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4357 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
4360 data_descriptor_decrement_rc (dd->mesh_data);
4362 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
4364 path_info = queue->cls;
4365 path_destroy (path_info->path);
4369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
4371 GNUNET_free_non_null (queue->cls);
4373 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
4374 queue->peer->queue_tail,
4376 GNUNET_free (queue);
4381 * Core callback to write a queued packet to core buffer
4383 * @param cls Closure (peer info).
4384 * @param size Number of bytes available in buf.
4385 * @param buf Where the to write the message.
4387 * @return number of bytes written to buf
4390 queue_send (void *cls, size_t size, void *buf)
4392 struct MeshPeerInfo *peer = cls;
4393 struct GNUNET_MessageHeader *msg;
4394 struct MeshPeerQueue *queue;
4395 struct MeshTunnel *t;
4398 peer->core_transmit = NULL;
4399 queue = peer->queue_head;
4401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
4403 /* If queue is empty, send should have been cancelled */
4409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
4411 /* Check if buffer size is enough for the message */
4412 if (queue->size > size)
4414 struct GNUNET_PeerIdentity id;
4416 GNUNET_PEER_resolve (peer->id, &id);
4417 peer->core_transmit =
4418 GNUNET_CORE_notify_transmit_ready(core_handle,
4421 GNUNET_TIME_UNIT_FOREVER_REL,
4428 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
4434 switch (queue->type)
4436 case 0: // RAW data (preconstructed message, retransmission, etc.)
4437 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* raw\n");
4438 data_size = send_core_data_raw (queue->cls, size, buf);
4439 msg = (struct GNUNET_MessageHeader *) buf;
4440 switch (ntohs (msg->type)) // Type of preconstructed message
4442 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4443 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
4445 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4446 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4452 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4453 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
4454 data_size = send_core_data_multicast(queue->cls, size, buf);
4455 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
4457 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
4459 data_size = send_core_path_create(queue->cls, size, buf);
4461 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
4462 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
4463 data_size = send_core_path_ack(queue->cls, size, buf);
4467 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* type unknown\n");
4471 /* Free queue, but cls was freed by send_core_* */
4472 queue_destroy (queue, GNUNET_NO);
4474 if (GNUNET_YES == t->destroy && 0 == t->fwd_queue_n)
4476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
4480 /* If more data in queue, send next */
4481 if (NULL != peer->queue_head)
4483 struct GNUNET_PeerIdentity id;
4485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
4486 GNUNET_PEER_resolve (peer->id, &id);
4487 peer->core_transmit =
4488 GNUNET_CORE_notify_transmit_ready(core_handle,
4491 GNUNET_TIME_UNIT_FOREVER_REL,
4493 peer->queue_head->size,
4497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
4503 * Queue and pass message to core when possible.
4505 * @param cls Closure (type dependant).
4506 * @param type Type of the message, 0 for a raw message.
4507 * @param size Size of the message.
4508 * @param dst Neighbor to send message to.
4509 * @param t Tunnel this message belongs to.
4512 queue_add (void *cls, uint16_t type, size_t size,
4513 struct MeshPeerInfo *dst, struct MeshTunnel *t)
4515 struct MeshPeerQueue *queue;
4519 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
4520 GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
4522 n = &t->fwd_queue_n;
4523 max = &t->fwd_queue_max;
4527 n = &t->bck_queue_n;
4528 max = &t->bck_queue_max;
4532 if (NULL == t->owner)
4533 GNUNET_break_op(0); // TODO: kill connection?
4536 return; // Drop message
4539 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
4545 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
4546 if (NULL == dst->core_transmit)
4548 struct GNUNET_PeerIdentity id;
4550 GNUNET_PEER_resolve (dst->id, &id);
4551 dst->core_transmit =
4552 GNUNET_CORE_notify_transmit_ready(core_handle,
4555 GNUNET_TIME_UNIT_FOREVER_REL,
4564 /******************************************************************************/
4565 /******************** MESH NETWORK HANDLERS **************************/
4566 /******************************************************************************/
4570 * Core handler for path creation
4572 * @param cls closure
4573 * @param message message
4574 * @param peer peer identity this notification is about
4575 * @param atsi performance data
4576 * @param atsi_count number of records in 'atsi'
4578 * @return GNUNET_OK to keep the connection open,
4579 * GNUNET_SYSERR to close it (signal serious error)
4582 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
4583 const struct GNUNET_MessageHeader *message,
4584 const struct GNUNET_ATS_Information *atsi,
4585 unsigned int atsi_count)
4587 unsigned int own_pos;
4590 MESH_TunnelNumber tid;
4591 struct GNUNET_MESH_ManipulatePath *msg;
4592 struct GNUNET_PeerIdentity *pi;
4593 struct GNUNET_HashCode hash;
4594 struct MeshPeerPath *path;
4595 struct MeshPeerInfo *dest_peer_info;
4596 struct MeshPeerInfo *orig_peer_info;
4597 struct MeshTunnel *t;
4599 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4600 "Received a path create msg [%s]\n",
4601 GNUNET_i2s (&my_full_id));
4602 size = ntohs (message->size);
4603 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4605 GNUNET_break_op (0);
4609 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4610 if (size % sizeof (struct GNUNET_PeerIdentity))
4612 GNUNET_break_op (0);
4615 size /= sizeof (struct GNUNET_PeerIdentity);
4618 GNUNET_break_op (0);
4621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4622 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4624 tid = ntohl (msg->tid);
4625 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4627 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
4628 t = tunnel_get (pi, tid);
4629 if (NULL == t) // FIXME only for INCOMING tunnels?
4633 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
4634 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
4637 // FIXME notify failure
4640 opt = ntohl (msg->opt);
4641 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
4642 GNUNET_YES : GNUNET_NO;
4643 t->nobuffer = (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER)) ?
4644 GNUNET_YES : GNUNET_NO;
4646 if (GNUNET_YES == t->nobuffer)
4648 t->bck_queue_max = 1;
4649 t->fwd_queue_max = 1;
4652 // FIXME only assign a local tid if a local client is interested (on demand)
4653 while (NULL != tunnel_get_incoming (next_local_tid))
4654 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4655 t->local_tid_dest = next_local_tid++;
4656 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4659 tunnel_reset_timeout (t);
4660 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4662 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
4663 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
4671 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
4672 if (NULL == dest_peer_info)
4674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4675 " Creating PeerInfo for destination.\n");
4676 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4677 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
4678 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
4680 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4682 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
4683 if (NULL == orig_peer_info)
4685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4686 " Creating PeerInfo for origin.\n");
4687 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4688 orig_peer_info->id = GNUNET_PEER_intern (pi);
4689 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
4690 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4693 path = path_new (size);
4695 for (i = 0; i < size; i++)
4697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4698 GNUNET_i2s (&pi[i]));
4699 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4700 if (path->peers[i] == myid)
4703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4706 /* cannot be self, must be 'not found' */
4707 /* create path: self not found in path through self */
4708 GNUNET_break_op (0);
4709 path_destroy (path);
4713 path_add_to_peers (path, GNUNET_NO);
4714 tunnel_add_path (t, path, own_pos);
4715 if (own_pos == size - 1)
4717 /* It is for us! Send ack. */
4718 struct MeshTransmissionDescriptor *info;
4720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4721 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4722 if (NULL == t->peers)
4724 /* New tunnel! Notify clients on data. */
4725 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
4727 GNUNET_break (GNUNET_SYSERR !=
4728 GNUNET_CONTAINER_multihashmap_put (t->peers,
4729 &my_full_id.hashPubKey,
4732 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
4733 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
4734 info->origin = &t->id;
4735 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4736 GNUNET_assert (NULL != info->peer);
4738 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4739 sizeof (struct GNUNET_MESH_PathACK),
4745 struct MeshPeerPath *path2;
4747 /* It's for somebody else! Retransmit. */
4748 path2 = path_duplicate (path);
4749 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4750 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4751 path2 = path_duplicate (path);
4752 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
4753 send_create_path (dest_peer_info, path, t);
4760 * Core handler for path destruction
4762 * @param cls closure
4763 * @param message message
4764 * @param peer peer identity this notification is about
4765 * @param atsi performance data
4766 * @param atsi_count number of records in 'atsi'
4768 * @return GNUNET_OK to keep the connection open,
4769 * GNUNET_SYSERR to close it (signal serious error)
4772 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4773 const struct GNUNET_MessageHeader *message,
4774 const struct GNUNET_ATS_Information *atsi,
4775 unsigned int atsi_count)
4777 struct GNUNET_MESH_ManipulatePath *msg;
4778 struct GNUNET_PeerIdentity *pi;
4779 struct MeshPeerPath *path;
4780 struct MeshTunnel *t;
4781 unsigned int own_pos;
4785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4786 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
4787 size = ntohs (message->size);
4788 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4790 GNUNET_break_op (0);
4794 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4795 if (size % sizeof (struct GNUNET_PeerIdentity))
4797 GNUNET_break_op (0);
4800 size /= sizeof (struct GNUNET_PeerIdentity);
4803 GNUNET_break_op (0);
4806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4808 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4809 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4811 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
4813 t = tunnel_get (pi, ntohl (msg->tid));
4816 /* TODO notify back: we don't know this tunnel */
4817 GNUNET_break_op (0);
4820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4821 path = path_new (size);
4823 for (i = 0; i < size; i++)
4825 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4826 GNUNET_i2s (&pi[i]));
4827 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4828 if (path->peers[i] == myid)
4831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4832 if (own_pos < path->length - 1)
4833 send_message (message, &pi[own_pos + 1], t);
4835 send_client_tunnel_disconnect(t, NULL);
4837 tunnel_delete_peer (t, path->peers[path->length - 1]);
4838 path_destroy (path);
4844 * Core handler for notifications of broken paths
4846 * @param cls closure
4847 * @param message message
4848 * @param peer peer identity this notification is about
4849 * @param atsi performance data
4850 * @param atsi_count number of records in 'atsi'
4852 * @return GNUNET_OK to keep the connection open,
4853 * GNUNET_SYSERR to close it (signal serious error)
4856 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4857 const struct GNUNET_MessageHeader *message,
4858 const struct GNUNET_ATS_Information *atsi,
4859 unsigned int atsi_count)
4861 struct GNUNET_MESH_PathBroken *msg;
4862 struct MeshTunnel *t;
4864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4865 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4866 msg = (struct GNUNET_MESH_PathBroken *) message;
4867 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4868 GNUNET_i2s (&msg->peer1));
4869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4870 GNUNET_i2s (&msg->peer2));
4871 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4874 GNUNET_break_op (0);
4877 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4878 GNUNET_PEER_search (&msg->peer2));
4885 * Core handler for tunnel destruction
4887 * @param cls closure
4888 * @param message message
4889 * @param peer peer identity this notification is about
4890 * @param atsi performance data
4891 * @param atsi_count number of records in 'atsi'
4893 * @return GNUNET_OK to keep the connection open,
4894 * GNUNET_SYSERR to close it (signal serious error)
4897 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4898 const struct GNUNET_MessageHeader *message,
4899 const struct GNUNET_ATS_Information *atsi,
4900 unsigned int atsi_count)
4902 struct GNUNET_MESH_TunnelDestroy *msg;
4903 struct MeshTunnel *t;
4905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4906 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
4907 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
4909 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4910 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4913 /* Probably already got the message from another path,
4914 * destroyed the tunnel and retransmitted to children.
4917 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4920 if (t->id.oid == myid)
4922 GNUNET_break_op (0);
4925 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4927 /* Tunnel was incoming, notify clients */
4928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4929 t->local_tid, t->local_tid_dest);
4930 send_clients_tunnel_destroy (t);
4932 tunnel_send_destroy (t);
4933 t->destroy = GNUNET_YES;
4934 // TODO: add timeout to destroy the tunnel anyway
4940 * Core handler for mesh network traffic going from the origin to a peer
4942 * @param cls closure
4943 * @param peer peer identity this notification is about
4944 * @param message message
4945 * @param atsi performance data
4946 * @param atsi_count number of records in 'atsi'
4947 * @return GNUNET_OK to keep the connection open,
4948 * GNUNET_SYSERR to close it (signal serious error)
4951 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4952 const struct GNUNET_MessageHeader *message,
4953 const struct GNUNET_ATS_Information *atsi,
4954 unsigned int atsi_count)
4956 struct GNUNET_MESH_Unicast *msg;
4957 struct GNUNET_PeerIdentity *neighbor;
4958 struct MeshTunnelChildInfo *cinfo;
4959 struct MeshTunnel *t;
4960 GNUNET_PEER_Id dest_id;
4965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
4968 size = ntohs (message->size);
4970 sizeof (struct GNUNET_MESH_Unicast) +
4971 sizeof (struct GNUNET_MessageHeader))
4976 msg = (struct GNUNET_MESH_Unicast *) message;
4977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
4978 ntohs (msg[1].header.type));
4980 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4983 /* TODO notify back: we don't know this tunnel */
4984 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4985 GNUNET_break_op (0);
4988 pid = ntohl (msg->pid);
4989 if (t->fwd_pid == pid)
4991 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
4992 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4993 " Already seen pid %u, DROPPING!\n", pid);
4998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4999 " pid %u not seen yet, forwarding\n", pid);
5001 t->skip += (pid - t->fwd_pid) - 1;
5003 if (is_pid_bigger (pid, t->last_fwd_ack))
5005 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5006 GNUNET_break_op (0);
5009 tunnel_reset_timeout (t);
5010 dest_id = GNUNET_PEER_search (&msg->destination);
5011 if (dest_id == myid)
5013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5014 " it's for us! sending to clients...\n");
5015 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
5016 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
5017 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5020 ttl = ntohl (msg->ttl);
5021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5024 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5025 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5026 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5030 " not for us, retransmitting...\n");
5032 neighbor = tree_get_first_hop (t->tree, dest_id);
5033 cinfo = tunnel_get_neighbor_fc (t, neighbor);
5035 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
5038 if (is_pid_bigger (pid, cinfo->fwd_ack))
5040 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5041 GNUNET_break_op (0);
5044 send_message (message, neighbor, t);
5045 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
5052 * Core handler for mesh network traffic going from the origin to all peers
5054 * @param cls closure
5055 * @param message message
5056 * @param peer peer identity this notification is about
5057 * @param atsi performance data
5058 * @param atsi_count number of records in 'atsi'
5059 * @return GNUNET_OK to keep the connection open,
5060 * GNUNET_SYSERR to close it (signal serious error)
5062 * TODO: Check who we got this from, to validate route.
5065 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5066 const struct GNUNET_MessageHeader *message,
5067 const struct GNUNET_ATS_Information *atsi,
5068 unsigned int atsi_count)
5070 struct GNUNET_MESH_Multicast *msg;
5071 struct MeshTunnel *t;
5075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
5077 size = ntohs (message->size);
5078 if (sizeof (struct GNUNET_MESH_Multicast) +
5079 sizeof (struct GNUNET_MessageHeader) > size)
5081 GNUNET_break_op (0);
5084 msg = (struct GNUNET_MESH_Multicast *) message;
5085 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5089 /* TODO notify that we dont know that tunnel */
5090 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5091 GNUNET_break_op (0);
5094 pid = ntohl (msg->pid);
5095 if (t->fwd_pid == pid)
5097 /* already seen this packet, drop */
5098 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5099 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5100 " Already seen pid %u, DROPPING!\n", pid);
5101 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5107 " pid %u not seen yet, forwarding\n", pid);
5109 t->skip += (pid - t->fwd_pid) - 1;
5111 tunnel_reset_timeout (t);
5113 /* Transmit to locally interested clients */
5114 if (NULL != t->peers &&
5115 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
5117 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
5118 send_subscribed_clients (message, &msg[1].header);
5119 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5121 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
5122 if (ntohl (msg->ttl) == 0)
5124 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5125 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5126 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5129 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
5130 tunnel_send_multicast (t, message, GNUNET_NO);
5136 * Core handler for mesh network traffic toward the owner of a tunnel
5138 * @param cls closure
5139 * @param message message
5140 * @param peer peer identity this notification is about
5141 * @param atsi performance data
5142 * @param atsi_count number of records in 'atsi'
5144 * @return GNUNET_OK to keep the connection open,
5145 * GNUNET_SYSERR to close it (signal serious error)
5148 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
5149 const struct GNUNET_MessageHeader *message,
5150 const struct GNUNET_ATS_Information *atsi,
5151 unsigned int atsi_count)
5153 struct GNUNET_MESH_ToOrigin *msg;
5154 struct GNUNET_PeerIdentity id;
5155 struct MeshPeerInfo *peer_info;
5156 struct MeshTunnel *t;
5159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
5161 size = ntohs (message->size);
5162 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
5163 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
5165 GNUNET_break_op (0);
5168 msg = (struct GNUNET_MESH_ToOrigin *) message;
5169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
5170 ntohs (msg[1].header.type));
5171 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5175 /* TODO notify that we dont know this tunnel (whom)? */
5176 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5177 GNUNET_break_op (0);
5181 if (NULL != t->owner)
5184 struct GNUNET_MESH_ToOrigin *copy;
5186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5187 " it's for us! sending to clients...\n");
5188 if (NULL == t->owner)
5190 /* got data packet for ownerless tunnel */
5191 GNUNET_STATISTICS_update (stats, "# data on ownerless tunnel",
5193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no clients!\n");
5194 GNUNET_break_op (0);
5197 /* TODO signature verification */
5198 memcpy (cbuf, message, size);
5199 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
5200 copy->tid = htonl (t->local_tid);
5201 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
5202 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
5203 ©->header, GNUNET_NO);
5204 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5208 " not for us, retransmitting...\n");
5210 peer_info = peer_info_get (&msg->oid);
5211 if (NULL == peer_info)
5213 /* unknown origin of tunnel */
5217 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5218 send_message (message, &id, t);
5219 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
5226 * Core handler for mesh network traffic point-to-point acks.
5228 * @param cls closure
5229 * @param message message
5230 * @param peer peer identity this notification is about
5231 * @param atsi performance data
5232 * @param atsi_count number of records in 'atsi'
5234 * @return GNUNET_OK to keep the connection open,
5235 * GNUNET_SYSERR to close it (signal serious error)
5238 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5239 const struct GNUNET_MessageHeader *message,
5240 const struct GNUNET_ATS_Information *atsi,
5241 unsigned int atsi_count)
5243 struct GNUNET_MESH_ACK *msg;
5244 struct MeshTunnel *t;
5247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
5249 msg = (struct GNUNET_MESH_ACK *) message;
5250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %u\n",
5251 ntohs (msg[1].header.type));
5252 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5256 /* TODO notify that we dont know this tunnel (whom)? */
5257 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
5258 GNUNET_break_op (0);
5261 ack = ntohl (msg->pid);
5263 /* Is this a forward or backward ACK? */
5264 if (tree_get_predecessor(t->tree) == GNUNET_PEER_search(peer))
5266 struct MeshTunnelChildInfo *cinfo;
5268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
5269 cinfo = tunnel_get_neighbor_fc (t, peer);
5270 cinfo->fwd_ack = ack;
5271 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5275 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
5277 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5279 // FIXME fc Unlock queues?
5285 * Core handler for path ACKs
5287 * @param cls closure
5288 * @param message message
5289 * @param peer peer identity this notification is about
5290 * @param atsi performance data
5291 * @param atsi_count number of records in 'atsi'
5293 * @return GNUNET_OK to keep the connection open,
5294 * GNUNET_SYSERR to close it (signal serious error)
5297 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5298 const struct GNUNET_MessageHeader *message,
5299 const struct GNUNET_ATS_Information *atsi,
5300 unsigned int atsi_count)
5302 struct GNUNET_MESH_PathACK *msg;
5303 struct GNUNET_PeerIdentity id;
5304 struct MeshPeerInfo *peer_info;
5305 struct MeshPeerPath *p;
5306 struct MeshTunnel *t;
5308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
5309 GNUNET_i2s (&my_full_id));
5310 msg = (struct GNUNET_MESH_PathACK *) message;
5311 t = tunnel_get (&msg->oid, ntohl(msg->tid));
5314 /* TODO notify that we don't know the tunnel */
5315 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
5317 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
5321 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5323 peer_info = peer_info_get (&msg->peer_id);
5324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
5325 GNUNET_i2s (&msg->peer_id));
5326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
5329 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
5331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5332 "connect_by_string completed, stopping search\n");
5333 regex_cancel_search (t->regex_ctx);
5334 t->regex_ctx = NULL;
5337 /* Add paths to peers? */
5338 p = tree_get_path_to_peer (t->tree, peer_info->id);
5341 path_add_to_peers (p, GNUNET_YES);
5349 /* Message for us? */
5350 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
5352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5353 if (NULL == t->owner)
5355 GNUNET_break_op (0);
5358 if (NULL != t->dht_get_type)
5360 GNUNET_DHT_get_stop (t->dht_get_type);
5361 t->dht_get_type = NULL;
5363 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
5365 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
5366 send_client_peer_connected (t, peer_info->id);
5371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5372 " not for us, retransmitting...\n");
5373 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5374 peer_info = peer_info_get (&msg->oid);
5375 if (NULL == peer_info)
5377 /* If we know the tunnel, we should DEFINITELY know the peer */
5381 send_message (message, &id, t);
5387 * Functions to handle messages from core
5389 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
5390 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
5391 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
5392 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
5393 sizeof (struct GNUNET_MESH_PathBroken)},
5394 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
5395 sizeof (struct GNUNET_MESH_TunnelDestroy)},
5396 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
5397 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
5398 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
5399 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
5400 sizeof (struct GNUNET_MESH_ACK)},
5401 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
5402 sizeof (struct GNUNET_MESH_PathACK)},
5408 /******************************************************************************/
5409 /**************** MESH LOCAL HANDLER HELPERS ***********************/
5410 /******************************************************************************/
5413 * deregister_app: iterator for removing each application registered by a client
5415 * @param cls closure
5416 * @param key the hash of the application id (used to access the hashmap)
5417 * @param value the value stored at the key (client)
5419 * @return GNUNET_OK on success
5422 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
5424 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
5425 GNUNET_break (GNUNET_YES ==
5426 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
5432 * notify_client_connection_failure: notify a client that the connection to the
5433 * requested remote peer is not possible (for instance, no route found)
5434 * Function called when the socket is ready to queue more data. "buf" will be
5435 * NULL and "size" zero if the socket was closed for writing in the meantime.
5437 * @param cls closure
5438 * @param size number of bytes available in buf
5439 * @param buf where the callee should write the message
5440 * @return number of bytes written to buf
5443 notify_client_connection_failure (void *cls, size_t size, void *buf)
5446 struct MeshPeerInfo *peer_info;
5447 struct GNUNET_MESH_PeerControl *msg;
5448 struct GNUNET_PeerIdentity id;
5450 if (0 == size && NULL == buf)
5452 // TODO retry? cancel?
5456 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
5457 peer_info = (struct MeshPeerInfo *) cls;
5458 msg = (struct GNUNET_MESH_PeerControl *) buf;
5459 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
5460 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
5461 // msg->tunnel_id = htonl(peer_info->t->tid);
5462 GNUNET_PEER_resolve (peer_info->id, &id);
5463 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
5471 * Send keepalive packets for a peer
5473 * @param cls Closure (tunnel for which to send the keepalive).
5474 * @param tc Notification context.
5476 * TODO: implement explicit multicast keepalive?
5479 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5481 struct MeshTunnel *t = cls;
5482 struct GNUNET_MessageHeader *payload;
5483 struct GNUNET_MESH_Multicast *msg;
5485 sizeof (struct GNUNET_MESH_Multicast) +
5486 sizeof (struct GNUNET_MessageHeader);
5489 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
5493 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
5495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5496 "sending keepalive for tunnel %d\n", t->id.tid);
5498 msg = (struct GNUNET_MESH_Multicast *) cbuf;
5499 msg->header.size = htons (size);
5500 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5501 msg->oid = my_full_id;
5502 msg->tid = htonl (t->id.tid);
5503 msg->ttl = htonl (default_ttl);
5504 msg->pid = htonl (t->fwd_pid + 1);
5506 payload = (struct GNUNET_MessageHeader *) &msg[1];
5507 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
5508 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
5509 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
5511 t->path_refresh_task =
5512 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
5518 * Function to process paths received for a new peer addition. The recorded
5519 * paths form the initial tunnel, which can be optimized later.
5520 * Called on each result obtained for the DHT search.
5522 * @param cls closure
5523 * @param exp when will this value expire
5524 * @param key key of the result
5525 * @param get_path path of the get request
5526 * @param get_path_length lenght of get_path
5527 * @param put_path path of the put request
5528 * @param put_path_length length of the put_path
5529 * @param type type of the result
5530 * @param size number of bytes in data
5531 * @param data pointer to the result data
5533 * TODO: re-issue the request after certain time? cancel after X results?
5536 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5537 const struct GNUNET_HashCode * key,
5538 const struct GNUNET_PeerIdentity *get_path,
5539 unsigned int get_path_length,
5540 const struct GNUNET_PeerIdentity *put_path,
5541 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5542 size_t size, const void *data)
5544 struct MeshPathInfo *path_info = cls;
5545 struct MeshPeerPath *p;
5546 struct GNUNET_PeerIdentity pi;
5549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
5550 GNUNET_PEER_resolve (path_info->peer->id, &pi);
5551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
5553 p = path_build_from_dht (get_path, get_path_length, put_path,
5555 path_add_to_peers (p, GNUNET_NO);
5557 for (i = 0; i < path_info->peer->ntunnels; i++)
5559 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
5560 peer_info_connect (path_info->peer, path_info->t);
5568 * Function to process paths received for a new peer addition. The recorded
5569 * paths form the initial tunnel, which can be optimized later.
5570 * Called on each result obtained for the DHT search.
5572 * @param cls closure
5573 * @param exp when will this value expire
5574 * @param key key of the result
5575 * @param get_path path of the get request
5576 * @param get_path_length lenght of get_path
5577 * @param put_path path of the put request
5578 * @param put_path_length length of the put_path
5579 * @param type type of the result
5580 * @param size number of bytes in data
5581 * @param data pointer to the result data
5584 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5585 const struct GNUNET_HashCode * key,
5586 const struct GNUNET_PeerIdentity *get_path,
5587 unsigned int get_path_length,
5588 const struct GNUNET_PeerIdentity *put_path,
5589 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5590 size_t size, const void *data)
5592 const struct PBlock *pb = data;
5593 const struct GNUNET_PeerIdentity *pi = &pb->id;
5594 struct MeshTunnel *t = cls;
5595 struct MeshPeerInfo *peer_info;
5596 struct MeshPeerPath *p;
5598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
5599 if (size != sizeof (struct PBlock))
5601 GNUNET_break_op (0);
5604 if (ntohl(pb->type) != t->type)
5606 GNUNET_break_op (0);
5609 GNUNET_assert (NULL != t->owner);
5610 peer_info = peer_info_get (pi);
5611 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
5613 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
5615 p = path_build_from_dht (get_path, get_path_length, put_path,
5617 path_add_to_peers (p, GNUNET_NO);
5619 tunnel_add_peer (t, peer_info);
5620 peer_info_connect (peer_info, t);
5625 * Function to process DHT string to regex matching.
5626 * Called on each result obtained for the DHT search.
5628 * @param cls closure (search context)
5629 * @param exp when will this value expire
5630 * @param key key of the result
5631 * @param get_path path of the get request (not used)
5632 * @param get_path_length lenght of get_path (not used)
5633 * @param put_path path of the put request (not used)
5634 * @param put_path_length length of the put_path (not used)
5635 * @param type type of the result
5636 * @param size number of bytes in data
5637 * @param data pointer to the result data
5640 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5641 const struct GNUNET_HashCode * key,
5642 const struct GNUNET_PeerIdentity *get_path,
5643 unsigned int get_path_length,
5644 const struct GNUNET_PeerIdentity *put_path,
5645 unsigned int put_path_length,
5646 enum GNUNET_BLOCK_Type type,
5647 size_t size, const void *data)
5649 const struct MeshRegexAccept *block = data;
5650 struct MeshRegexSearchContext *ctx = cls;
5651 struct MeshRegexSearchInfo *info = ctx->info;
5652 struct MeshPeerPath *p;
5653 struct MeshPeerInfo *peer_info;
5655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
5656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
5658 peer_info = peer_info_get(&block->id);
5659 p = path_build_from_dht (get_path, get_path_length, put_path,
5661 path_add_to_peers (p, GNUNET_NO);
5664 tunnel_add_peer (info->t, peer_info);
5665 peer_info_connect (peer_info, info->t);
5666 if (0 == info->peer)
5668 info->peer = peer_info->id;
5672 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
5675 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
5676 ®ex_connect_timeout,
5684 * Function to process DHT string to regex matching.
5685 * Called on each result obtained for the DHT search.
5687 * @param cls closure (search context)
5688 * @param exp when will this value expire
5689 * @param key key of the result
5690 * @param get_path path of the get request (not used)
5691 * @param get_path_length lenght of get_path (not used)
5692 * @param put_path path of the put request (not used)
5693 * @param put_path_length length of the put_path (not used)
5694 * @param type type of the result
5695 * @param size number of bytes in data
5696 * @param data pointer to the result data
5698 * TODO: re-issue the request after certain time? cancel after X results?
5701 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5702 const struct GNUNET_HashCode * key,
5703 const struct GNUNET_PeerIdentity *get_path,
5704 unsigned int get_path_length,
5705 const struct GNUNET_PeerIdentity *put_path,
5706 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5707 size_t size, const void *data)
5709 const struct MeshRegexBlock *block = data;
5710 struct MeshRegexSearchContext *ctx = cls;
5711 struct MeshRegexSearchInfo *info = ctx->info;
5715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5716 "DHT GET STRING RETURNED RESULTS\n");
5717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5718 " key: %s\n", GNUNET_h2s (key));
5720 copy = GNUNET_malloc (size);
5721 memcpy (copy, data, size);
5722 GNUNET_break (GNUNET_OK ==
5723 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
5724 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
5725 len = ntohl (block->n_proof);
5727 char proof[len + 1];
5729 memcpy (proof, &block[1], len);
5731 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
5733 GNUNET_break_op (0);
5737 len = strlen (info->description);
5738 if (len == ctx->position) // String processed
5740 if (GNUNET_YES == ntohl (block->accepting))
5742 regex_find_path(key, ctx);
5746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
5747 // FIXME REGEX this block not successful, wait for more? start timeout?
5751 GNUNET_break (GNUNET_OK ==
5752 GNUNET_MESH_regex_block_iterate (block, size,
5753 ®ex_edge_iterator, ctx));
5757 /******************************************************************************/
5758 /********************* MESH LOCAL HANDLES **************************/
5759 /******************************************************************************/
5763 * Handler for client disconnection
5765 * @param cls closure
5766 * @param client identification of the client; NULL
5767 * for the last call when the server is destroyed
5770 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
5772 struct MeshClient *c;
5773 struct MeshClient *next;
5776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
5779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
5785 if (c->handle != client)
5787 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
5791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
5793 GNUNET_SERVER_client_drop (c->handle);
5794 c->shutting_down = GNUNET_YES;
5795 GNUNET_assert (NULL != c->own_tunnels);
5796 GNUNET_assert (NULL != c->incoming_tunnels);
5797 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
5798 &tunnel_destroy_iterator, c);
5799 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
5800 &tunnel_destroy_iterator, c);
5801 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
5802 &tunnel_destroy_iterator, c);
5803 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
5804 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
5805 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
5807 /* deregister clients applications */
5808 if (NULL != c->apps)
5810 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
5811 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
5813 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
5814 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
5816 GNUNET_SCHEDULER_cancel (announce_applications_task);
5817 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
5819 if (NULL != c->types)
5820 GNUNET_CONTAINER_multihashmap_destroy (c->types);
5821 for (i = 0; i < c->n_regex; i++)
5823 GNUNET_free (c->regexes[i]);
5825 GNUNET_free_non_null (c->regexes);
5826 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
5827 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
5829 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
5830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
5832 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
5835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
5841 * Handler for new clients
5843 * @param cls closure
5844 * @param client identification of the client
5845 * @param message the actual message, which includes messages the client wants
5848 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
5849 const struct GNUNET_MessageHeader *message)
5851 struct GNUNET_MESH_ClientConnect *cc_msg;
5852 struct MeshClient *c;
5853 GNUNET_MESH_ApplicationType *a;
5860 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
5861 /* Check data sanity */
5862 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
5863 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
5864 ntypes = ntohs (cc_msg->types);
5865 napps = ntohs (cc_msg->applications);
5867 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
5870 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5874 /* Create new client structure */
5875 c = GNUNET_malloc (sizeof (struct MeshClient));
5876 c->id = next_client_id++;
5877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
5879 GNUNET_SERVER_client_keep (client);
5880 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
5883 GNUNET_MESH_ApplicationType at;
5884 struct GNUNET_HashCode hc;
5886 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
5887 for (i = 0; i < napps; i++)
5890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
5891 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
5892 /* store in clients hashmap */
5893 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
5894 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5895 /* store in global hashmap, for announcements */
5896 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
5897 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5899 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
5900 announce_applications_task =
5901 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
5907 struct GNUNET_HashCode hc;
5909 t = (uint16_t *) & a[napps];
5910 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
5911 for (i = 0; i < ntypes; i++)
5914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
5915 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
5917 /* store in clients hashmap */
5918 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
5919 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5920 /* store in global hashmap */
5921 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
5922 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5926 " client has %u+%u subscriptions\n", napps, ntypes);
5928 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
5929 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5930 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5931 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5932 GNUNET_SERVER_notification_context_add (nc, client);
5933 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
5935 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
5941 * Handler for clients announcing available services by a regular expression.
5943 * @param cls closure
5944 * @param client identification of the client
5945 * @param message the actual message, which includes messages the client wants
5948 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
5949 const struct GNUNET_MessageHeader *message)
5951 struct MeshClient *c;
5955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
5957 /* Sanity check for client registration */
5958 if (NULL == (c = client_get (client)))
5961 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5966 len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
5967 regex = GNUNET_malloc (len + 1);
5968 memcpy (regex, &message[1], len);
5970 GNUNET_array_append (c->regexes, c->n_regex, regex);
5971 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
5973 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
5979 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
5985 * Handler for requests of new tunnels
5987 * @param cls closure
5988 * @param client identification of the client
5989 * @param message the actual message
5992 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
5993 const struct GNUNET_MessageHeader *message)
5995 struct GNUNET_MESH_TunnelMessage *t_msg;
5996 struct MeshTunnel *t;
5997 struct MeshClient *c;
5998 MESH_TunnelNumber tid;
6000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
6002 /* Sanity check for client registration */
6003 if (NULL == (c = client_get (client)))
6006 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6011 /* Message sanity check */
6012 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6015 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6019 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6020 /* Sanity check for tunnel numbering */
6021 tid = ntohl (t_msg->tunnel_id);
6022 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
6025 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6028 /* Sanity check for duplicate tunnel IDs */
6029 if (NULL != tunnel_get_by_local_id (c, tid))
6032 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6036 while (NULL != tunnel_get_by_pi (myid, next_tid))
6037 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6038 t = tunnel_new (myid, next_tid++, c, tid);
6041 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
6043 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6046 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
6048 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
6049 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
6051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
6052 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6058 * Handler for requests of deleting tunnels
6060 * @param cls closure
6061 * @param client identification of the client
6062 * @param message the actual message
6065 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
6066 const struct GNUNET_MessageHeader *message)
6068 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6069 struct MeshClient *c;
6070 struct MeshTunnel *t;
6071 MESH_TunnelNumber tid;
6073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6074 "Got a DESTROY TUNNEL from client!\n");
6076 /* Sanity check for client registration */
6077 if (NULL == (c = client_get (client)))
6080 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6083 /* Message sanity check */
6084 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6087 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6091 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6093 /* Retrieve tunnel */
6094 tid = ntohl (tunnel_msg->tunnel_id);
6095 t = tunnel_get_by_local_id(c, tid);
6098 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6100 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6103 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6105 client_ignore_tunnel (c, t);
6107 // TODO: when to destroy incoming tunnel?
6108 if (t->nclients == 0)
6110 GNUNET_assert (GNUNET_YES ==
6111 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
6113 GNUNET_assert (GNUNET_YES ==
6114 GNUNET_CONTAINER_multihashmap_remove (t->peers,
6115 &my_full_id.hashPubKey,
6119 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6122 send_client_tunnel_disconnect(t, c);
6123 client_delete_tunnel(c, t);
6125 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
6127 tunnel_send_destroy (t);
6128 t->destroy = GNUNET_YES;
6129 // The tunnel will be destroyed when the last message is transmitted.
6130 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6136 * Handler for requests of seeting tunnel's speed.
6138 * @param cls Closure (unused).
6139 * @param client Identification of the client.
6140 * @param message The actual message.
6143 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
6144 const struct GNUNET_MessageHeader *message)
6146 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6147 struct MeshClient *c;
6148 struct MeshTunnel *t;
6149 MESH_TunnelNumber tid;
6151 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6152 "Got a SPEED request from client!\n");
6154 /* Sanity check for client registration */
6155 if (NULL == (c = client_get (client)))
6158 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6162 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6163 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6165 /* Retrieve tunnel */
6166 tid = ntohl (tunnel_msg->tunnel_id);
6167 t = tunnel_get_by_local_id(c, tid);
6170 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
6172 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6176 switch (ntohs(message->type))
6178 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
6179 t->speed_min = GNUNET_YES;
6181 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
6182 t->speed_min = GNUNET_NO;
6187 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6192 * Handler for requests of seeting tunnel's buffering policy.
6194 * @param cls Closure (unused).
6195 * @param client Identification of the client.
6196 * @param message The actual message.
6199 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
6200 const struct GNUNET_MessageHeader *message)
6202 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6203 struct MeshClient *c;
6204 struct MeshTunnel *t;
6205 MESH_TunnelNumber tid;
6207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6208 "Got a BUFFER request from client!\n");
6210 /* Sanity check for client registration */
6211 if (NULL == (c = client_get (client)))
6214 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6219 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6221 /* Retrieve tunnel */
6222 tid = ntohl (tunnel_msg->tunnel_id);
6223 t = tunnel_get_by_local_id(c, tid);
6226 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6228 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6232 switch (ntohs(message->type))
6234 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
6235 t->nobuffer = GNUNET_NO;
6237 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
6238 t->nobuffer = GNUNET_YES;
6244 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6249 * Handler for connection requests to new peers
6251 * @param cls closure
6252 * @param client identification of the client
6253 * @param message the actual message (PeerControl)
6256 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
6257 const struct GNUNET_MessageHeader *message)
6259 struct GNUNET_MESH_PeerControl *peer_msg;
6260 struct MeshPeerInfo *peer_info;
6261 struct MeshClient *c;
6262 struct MeshTunnel *t;
6263 MESH_TunnelNumber tid;
6265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
6266 /* Sanity check for client registration */
6267 if (NULL == (c = client_get (client)))
6270 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6274 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6275 /* Sanity check for message size */
6276 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6279 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6283 /* Tunnel exists? */
6284 tid = ntohl (peer_msg->tunnel_id);
6285 t = tunnel_get_by_local_id (c, tid);
6289 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6293 /* Does client own tunnel? */
6294 if (t->owner->handle != client)
6297 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
6301 GNUNET_i2s (&peer_msg->peer));
6302 peer_info = peer_info_get (&peer_msg->peer);
6304 tunnel_add_peer (t, peer_info);
6305 peer_info_connect (peer_info, t);
6307 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6313 * Handler for disconnection requests of peers in a tunnel
6315 * @param cls closure
6316 * @param client identification of the client
6317 * @param message the actual message (PeerControl)
6320 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
6321 const struct GNUNET_MessageHeader *message)
6323 struct GNUNET_MESH_PeerControl *peer_msg;
6324 struct MeshPeerInfo *peer_info;
6325 struct MeshClient *c;
6326 struct MeshTunnel *t;
6327 MESH_TunnelNumber tid;
6329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
6330 /* Sanity check for client registration */
6331 if (NULL == (c = client_get (client)))
6334 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6337 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6338 /* Sanity check for message size */
6339 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6342 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6346 /* Tunnel exists? */
6347 tid = ntohl (peer_msg->tunnel_id);
6348 t = tunnel_get_by_local_id (c, tid);
6352 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6357 /* Does client own tunnel? */
6358 if (t->owner->handle != client)
6361 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
6366 GNUNET_i2s (&peer_msg->peer));
6367 /* Is the peer in the tunnel? */
6369 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
6370 if (NULL == peer_info)
6373 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6377 /* Ok, delete peer from tunnel */
6378 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
6379 &peer_msg->peer.hashPubKey);
6381 send_destroy_path (t, peer_info->id);
6382 tunnel_delete_peer (t, peer_info->id);
6383 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6388 * Handler for blacklist requests of peers in a tunnel
6390 * @param cls closure
6391 * @param client identification of the client
6392 * @param message the actual message (PeerControl)
6395 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
6396 const struct GNUNET_MessageHeader *message)
6398 struct GNUNET_MESH_PeerControl *peer_msg;
6399 struct MeshClient *c;
6400 struct MeshTunnel *t;
6401 MESH_TunnelNumber tid;
6403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
6404 /* Sanity check for client registration */
6405 if (NULL == (c = client_get (client)))
6408 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6411 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6413 /* Sanity check for message size */
6414 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6417 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6421 /* Tunnel exists? */
6422 tid = ntohl (peer_msg->tunnel_id);
6423 t = tunnel_get_by_local_id (c, tid);
6427 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6432 GNUNET_array_append(t->blacklisted, t->nblacklisted,
6433 GNUNET_PEER_intern(&peer_msg->peer));
6438 * Handler for unblacklist requests of peers in a tunnel
6440 * @param cls closure
6441 * @param client identification of the client
6442 * @param message the actual message (PeerControl)
6445 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
6446 const struct GNUNET_MessageHeader *message)
6448 struct GNUNET_MESH_PeerControl *peer_msg;
6449 struct MeshClient *c;
6450 struct MeshTunnel *t;
6451 MESH_TunnelNumber tid;
6455 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
6456 /* Sanity check for client registration */
6457 if (NULL == (c = client_get (client)))
6460 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6463 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6465 /* Sanity check for message size */
6466 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6469 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6473 /* Tunnel exists? */
6474 tid = ntohl (peer_msg->tunnel_id);
6475 t = tunnel_get_by_local_id (c, tid);
6479 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6484 /* if peer is not known, complain */
6485 pid = GNUNET_PEER_search (&peer_msg->peer);
6492 /* search and remove from list */
6493 for (i = 0; i < t->nblacklisted; i++)
6495 if (t->blacklisted[i] == pid)
6497 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
6498 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
6503 /* if peer hasn't been blacklisted, complain */
6509 * Handler for connection requests to new peers by type
6511 * @param cls closure
6512 * @param client identification of the client
6513 * @param message the actual message (ConnectPeerByType)
6516 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
6517 const struct GNUNET_MessageHeader *message)
6519 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
6520 struct MeshClient *c;
6521 struct MeshTunnel *t;
6522 struct GNUNET_HashCode hash;
6523 MESH_TunnelNumber tid;
6525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
6526 /* Sanity check for client registration */
6527 if (NULL == (c = client_get (client)))
6530 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6534 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
6535 /* Sanity check for message size */
6536 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
6537 ntohs (connect_msg->header.size))
6540 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6544 /* Tunnel exists? */
6545 tid = ntohl (connect_msg->tunnel_id);
6546 t = tunnel_get_by_local_id (c, tid);
6550 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6554 /* Does client own tunnel? */
6555 if (t->owner->handle != client)
6558 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6562 /* Do WE have the service? */
6563 t->type = ntohl (connect_msg->type);
6564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
6565 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
6566 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
6569 /* Yes! Fast forward, add ourselves to the tunnel and send the
6570 * good news to the client, and alert the destination client of
6571 * an incoming tunnel.
6573 * FIXME send a path create to self, avoid code duplication
6575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
6576 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
6577 peer_info_get (&my_full_id),
6578 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
6581 send_client_peer_connected (t, myid);
6582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
6583 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6585 t->local_tid_dest = next_local_tid++;
6586 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
6587 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
6588 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6592 /* Ok, lets find a peer offering the service */
6593 if (NULL != t->dht_get_type)
6595 GNUNET_DHT_get_stop (t->dht_get_type);
6597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
6598 GNUNET_h2s (&hash));
6600 GNUNET_DHT_get_start (dht_handle,
6601 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
6603 dht_replication_level,
6604 GNUNET_DHT_RO_RECORD_ROUTE |
6605 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6607 &dht_get_type_handler, t);
6609 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6615 * Handler for connection requests to new peers by a string service description.
6617 * @param cls closure
6618 * @param client identification of the client
6619 * @param message the actual message, which includes messages the client wants
6622 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
6623 const struct GNUNET_MessageHeader *message)
6625 struct GNUNET_MESH_ConnectPeerByString *msg;
6626 struct MeshRegexSearchContext *ctx;
6627 struct MeshRegexSearchInfo *info;
6628 struct GNUNET_DHT_GetHandle *get_h;
6629 struct GNUNET_HashCode key;
6630 struct MeshTunnel *t;
6631 struct MeshClient *c;
6632 MESH_TunnelNumber tid;
6636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6637 "Connect by string started\n");
6638 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
6639 size = htons (message->size);
6641 /* Sanity check for client registration */
6642 if (NULL == (c = client_get (client)))
6645 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6649 /* Message size sanity check */
6650 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
6653 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6657 /* Tunnel exists? */
6658 tid = ntohl (msg->tunnel_id);
6659 t = tunnel_get_by_local_id (c, tid);
6663 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6667 /* Does client own tunnel? */
6668 if (t->owner->handle != client)
6671 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6676 " on tunnel %s [%u]\n",
6677 GNUNET_i2s(&my_full_id),
6680 /* Only one connect_by_string allowed at the same time! */
6681 /* FIXME: allow more, return handle at api level to cancel, document */
6682 if (NULL != t->regex_ctx)
6685 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6689 /* Find string itself */
6690 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
6691 string = (const char *) &msg[1];
6693 /* Initialize context */
6694 size = GNUNET_REGEX_get_first_key(string, len, &key);
6695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6696 " consumed %u bits out of %u\n", size, len);
6697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6698 " looking for %s\n", GNUNET_h2s (&key));
6700 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
6702 info->description = GNUNET_malloc (len + 1);
6703 memcpy (info->description, string, len);
6704 info->description[len] = '\0';
6705 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32);
6706 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32);
6707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
6709 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
6710 ctx->position = size;
6714 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
6716 /* Start search in DHT */
6717 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
6718 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
6719 &key, /* key to search */
6720 dht_replication_level, /* replication level */
6721 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6722 NULL, /* xquery */ // FIXME BLOOMFILTER
6723 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
6724 &dht_get_string_handler, ctx);
6726 GNUNET_break (GNUNET_OK ==
6727 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
6730 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
6732 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
6738 * Handler for client traffic directed to one peer
6740 * @param cls closure
6741 * @param client identification of the client
6742 * @param message the actual message
6745 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
6746 const struct GNUNET_MessageHeader *message)
6748 struct MeshClient *c;
6749 struct MeshTunnel *t;
6750 struct MeshPeerInfo *pi;
6751 struct GNUNET_MESH_Unicast *data_msg;
6752 MESH_TunnelNumber tid;
6755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6756 "Got a unicast request from a client!\n");
6758 /* Sanity check for client registration */
6759 if (NULL == (c = client_get (client)))
6762 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6765 data_msg = (struct GNUNET_MESH_Unicast *) message;
6766 /* Sanity check for message size */
6767 size = ntohs (message->size);
6768 if (sizeof (struct GNUNET_MESH_Unicast) +
6769 sizeof (struct GNUNET_MessageHeader) > size)
6772 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6776 /* Tunnel exists? */
6777 tid = ntohl (data_msg->tid);
6778 t = tunnel_get_by_local_id (c, tid);
6782 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6786 /* Is it a local tunnel? Then, does client own the tunnel? */
6787 if (t->owner->handle != client)
6790 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6794 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
6795 &data_msg->destination.hashPubKey);
6796 /* Is the selected peer in the tunnel? */
6800 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6804 /* Ok, everything is correct, send the message
6805 * (pretend we got it from a mesh peer)
6808 char buf[ntohs (message->size)] GNUNET_ALIGN;
6809 struct GNUNET_MESH_Unicast *copy;
6811 /* Work around const limitation */
6812 copy = (struct GNUNET_MESH_Unicast *) buf;
6813 memcpy (buf, data_msg, size);
6814 copy->oid = my_full_id;
6815 copy->tid = htonl (t->id.tid);
6816 copy->ttl = htonl (default_ttl);
6817 copy->pid = htonl (t->fwd_pid + 1);
6818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6819 " calling generic handler...\n");
6820 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
6822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
6823 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6829 * Handler for client traffic directed to the origin
6831 * @param cls closure
6832 * @param client identification of the client
6833 * @param message the actual message
6836 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
6837 const struct GNUNET_MessageHeader *message)
6839 struct GNUNET_MESH_ToOrigin *data_msg;
6840 struct GNUNET_PeerIdentity id;
6841 struct MeshClient *c;
6842 struct MeshTunnel *t;
6843 MESH_TunnelNumber tid;
6846 /* Sanity check for client registration */
6847 if (NULL == (c = client_get (client)))
6850 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6853 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
6854 /* Sanity check for message size */
6855 size = ntohs (message->size);
6856 if (sizeof (struct GNUNET_MESH_ToOrigin) +
6857 sizeof (struct GNUNET_MessageHeader) > size)
6860 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6864 /* Tunnel exists? */
6865 tid = ntohl (data_msg->tid);
6866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6867 "Got a ToOrigin request from a client! Tunnel %X\n", tid);
6868 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6871 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6874 t = tunnel_get_by_local_id (c, tid);
6878 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6882 /* It should be sent by someone who has this as incoming tunnel. */
6883 if (GNUNET_NO == client_knows_tunnel (c, t))
6886 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6889 GNUNET_PEER_resolve (t->id.oid, &id);
6891 /* Ok, everything is correct, send the message
6892 * (pretend we got it from a mesh peer)
6895 char buf[ntohs (message->size)] GNUNET_ALIGN;
6896 struct GNUNET_MESH_ToOrigin *copy;
6898 /* Work around const limitation */
6899 copy = (struct GNUNET_MESH_ToOrigin *) buf;
6900 memcpy (buf, data_msg, size);
6902 copy->tid = htonl (t->id.tid);
6903 copy->sender = my_full_id;
6904 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6905 " calling generic handler...\n");
6906 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
6908 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6914 * Handler for client traffic directed to all peers in a tunnel
6916 * @param cls closure
6917 * @param client identification of the client
6918 * @param message the actual message
6921 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
6922 const struct GNUNET_MessageHeader *message)
6924 struct MeshClient *c;
6925 struct MeshTunnel *t;
6926 struct GNUNET_MESH_Multicast *data_msg;
6927 MESH_TunnelNumber tid;
6929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6930 "Got a multicast request from a client!\n");
6932 /* Sanity check for client registration */
6933 if (NULL == (c = client_get (client)))
6936 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6939 data_msg = (struct GNUNET_MESH_Multicast *) message;
6940 /* Sanity check for message size */
6941 if (sizeof (struct GNUNET_MESH_Multicast) +
6942 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
6945 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6949 /* Tunnel exists? */
6950 tid = ntohl (data_msg->tid);
6951 t = tunnel_get_by_local_id (c, tid);
6955 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6959 /* Does client own tunnel? */
6960 if (t->owner->handle != client)
6963 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6968 char buf[ntohs (message->size)] GNUNET_ALIGN;
6969 struct GNUNET_MESH_Multicast *copy;
6971 copy = (struct GNUNET_MESH_Multicast *) buf;
6972 memcpy (buf, message, ntohs (message->size));
6973 copy->oid = my_full_id;
6974 copy->tid = htonl (t->id.tid);
6975 copy->ttl = htonl (default_ttl);
6976 copy->pid = htonl (t->fwd_pid + 1);
6977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6978 " calling generic handler...\n");
6979 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
6982 /* receive done gets called when last copy is sent to a neighbor */
6988 * Handler for client's ACKs for payload traffic.
6990 * @param cls Closure (unused).
6991 * @param client Identification of the client.
6992 * @param message The actual message.
6995 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
6996 const struct GNUNET_MessageHeader *message)
6998 struct GNUNET_MESH_LocalAck *msg;
6999 struct MeshTunnel *t;
7000 struct MeshClient *c;
7001 MESH_TunnelNumber tid;
7003 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
7004 /* Sanity check for client registration */
7005 if (NULL == (c = client_get (client)))
7008 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7012 msg = (struct GNUNET_MESH_LocalAck *) message;
7013 /* Tunnel exists? */
7014 tid = ntohl (msg->tunnel_id);
7015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7016 t = tunnel_get_by_local_id (c, tid);
7020 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7024 /* Does client own tunnel? I.E: Is this and ACK for BCK traffic? */
7025 if (NULL != t->owner && t->owner->handle == client)
7027 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
7028 t->bck_ack = ntohl(msg->max_pid);
7029 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7033 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
7034 tunnel_set_client_fwd_ack (t, c, ntohl (msg->max_pid));
7035 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7038 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7044 * Functions to handle messages from clients
7046 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
7047 {&handle_local_new_client, NULL,
7048 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
7049 {&handle_local_announce_regex, NULL,
7050 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
7051 {&handle_local_tunnel_create, NULL,
7052 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
7053 sizeof (struct GNUNET_MESH_TunnelMessage)},
7054 {&handle_local_tunnel_destroy, NULL,
7055 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
7056 sizeof (struct GNUNET_MESH_TunnelMessage)},
7057 {&handle_local_tunnel_speed, NULL,
7058 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
7059 sizeof (struct GNUNET_MESH_TunnelMessage)},
7060 {&handle_local_tunnel_speed, NULL,
7061 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
7062 sizeof (struct GNUNET_MESH_TunnelMessage)},
7063 {&handle_local_tunnel_buffer, NULL,
7064 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
7065 sizeof (struct GNUNET_MESH_TunnelMessage)},
7066 {&handle_local_tunnel_buffer, NULL,
7067 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
7068 sizeof (struct GNUNET_MESH_TunnelMessage)},
7069 {&handle_local_connect_add, NULL,
7070 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
7071 sizeof (struct GNUNET_MESH_PeerControl)},
7072 {&handle_local_connect_del, NULL,
7073 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
7074 sizeof (struct GNUNET_MESH_PeerControl)},
7075 {&handle_local_blacklist, NULL,
7076 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
7077 sizeof (struct GNUNET_MESH_PeerControl)},
7078 {&handle_local_unblacklist, NULL,
7079 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
7080 sizeof (struct GNUNET_MESH_PeerControl)},
7081 {&handle_local_connect_by_type, NULL,
7082 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
7083 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
7084 {&handle_local_connect_by_string, NULL,
7085 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
7086 {&handle_local_unicast, NULL,
7087 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
7088 {&handle_local_to_origin, NULL,
7089 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
7090 {&handle_local_multicast, NULL,
7091 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
7092 {&handle_local_ack, NULL,
7093 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
7094 sizeof (struct GNUNET_MESH_LocalAck)},
7100 * To be called on core init/fail.
7102 * @param cls service closure
7103 * @param server handle to the server for this service
7104 * @param identity the public identity of this peer
7107 core_init (void *cls, struct GNUNET_CORE_Handle *server,
7108 const struct GNUNET_PeerIdentity *identity)
7110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
7111 core_handle = server;
7112 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
7115 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
7116 GNUNET_SCHEDULER_shutdown ();
7123 * Method called whenever a given peer connects.
7125 * @param cls closure
7126 * @param peer peer identity this notification is about
7127 * @param atsi performance data for the connection
7128 * @param atsi_count number of records in 'atsi'
7131 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
7132 const struct GNUNET_ATS_Information *atsi,
7133 unsigned int atsi_count)
7135 struct MeshPeerInfo *peer_info;
7136 struct MeshPeerPath *path;
7138 DEBUG_CONN ("Peer connected\n");
7139 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
7140 peer_info = peer_info_get (peer);
7141 if (myid == peer_info->id)
7143 DEBUG_CONN (" (self)\n");
7148 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
7150 path = path_new (2);
7151 path->peers[0] = myid;
7152 path->peers[1] = peer_info->id;
7153 GNUNET_PEER_change_rc (myid, 1);
7154 GNUNET_PEER_change_rc (peer_info->id, 1);
7155 peer_info_add_path (peer_info, path, GNUNET_YES);
7156 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
7162 * Method called whenever a peer disconnects.
7164 * @param cls closure
7165 * @param peer peer identity this notification is about
7168 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
7170 struct MeshPeerInfo *pi;
7171 struct MeshPeerQueue *q;
7172 struct MeshPeerQueue *n;
7174 DEBUG_CONN ("Peer disconnected\n");
7175 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
7187 /* try to reroute this traffic instead */
7188 queue_destroy(q, GNUNET_YES);
7192 peer_info_remove_path (pi, pi->id, myid);
7195 DEBUG_CONN (" (self)\n");
7197 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
7202 /******************************************************************************/
7203 /************************ MAIN FUNCTIONS ****************************/
7204 /******************************************************************************/
7207 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
7209 * @param cls closure
7210 * @param key current key code
7211 * @param value value in the hash map
7212 * @return GNUNET_YES if we should continue to iterate,
7216 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
7218 struct MeshTunnel *t = value;
7225 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
7227 * @param cls closure
7228 * @param key current key code
7229 * @param value value in the hash map
7230 * @return GNUNET_YES if we should continue to iterate,
7234 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
7236 struct MeshPeerInfo *p = value;
7237 struct MeshPeerQueue *q;
7238 struct MeshPeerQueue *n;
7246 queue_destroy(q, GNUNET_YES);
7250 peer_info_destroy (p);
7255 * Task run during shutdown.
7261 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
7263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
7265 if (core_handle != NULL)
7267 GNUNET_CORE_disconnect (core_handle);
7270 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
7271 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
7272 if (dht_handle != NULL)
7274 GNUNET_DHT_disconnect (dht_handle);
7279 GNUNET_SERVER_notification_context_destroy (nc);
7282 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
7284 GNUNET_SCHEDULER_cancel (announce_id_task);
7285 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
7287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
7291 * Process mesh requests.
7293 * @param cls closure
7294 * @param server the initialized server
7295 * @param c configuration to use
7298 run (void *cls, struct GNUNET_SERVER_Handle *server,
7299 const struct GNUNET_CONFIGURATION_Handle *c)
7301 struct MeshPeerInfo *peer;
7302 struct MeshPeerPath *p;
7305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
7306 server_handle = server;
7307 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
7308 NULL, /* Closure passed to MESH functions */
7309 &core_init, /* Call core_init once connected */
7310 &core_connect, /* Handle connects */
7311 &core_disconnect, /* remove peers on disconnects */
7312 NULL, /* Don't notify about all incoming messages */
7313 GNUNET_NO, /* For header only in notification */
7314 NULL, /* Don't notify about all outbound messages */
7315 GNUNET_NO, /* For header-only out notification */
7316 core_handlers); /* Register these handlers */
7318 if (core_handle == NULL)
7321 GNUNET_SCHEDULER_shutdown ();
7326 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
7329 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7331 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7333 GNUNET_SCHEDULER_shutdown ();
7338 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
7339 &refresh_path_time))
7341 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7343 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7344 "refresh path time");
7345 GNUNET_SCHEDULER_shutdown ();
7350 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
7351 &app_announce_time))
7353 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7355 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7356 "app announce time");
7357 GNUNET_SCHEDULER_shutdown ();
7362 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
7365 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7367 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7368 "id announce time");
7369 GNUNET_SCHEDULER_shutdown ();
7374 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
7375 &unacknowledged_wait_time))
7377 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7379 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7380 "unacknowledged wait time");
7381 GNUNET_SCHEDULER_shutdown ();
7386 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
7389 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7391 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7393 GNUNET_SCHEDULER_shutdown ();
7398 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
7401 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7403 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7405 GNUNET_SCHEDULER_shutdown ();
7410 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
7413 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7415 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7417 GNUNET_SCHEDULER_shutdown ();
7422 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
7425 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7427 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
7433 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
7434 &dht_replication_level))
7436 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7438 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
7439 "dht replication level", 10);
7440 dht_replication_level = 10;
7444 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7445 GNUNET_free (keyfile);
7446 if (my_private_key == NULL)
7448 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7449 _("Mesh service could not access hostkey. Exiting.\n"));
7450 GNUNET_SCHEDULER_shutdown ();
7453 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7454 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
7455 &my_full_id.hashPubKey);
7456 myid = GNUNET_PEER_intern (&my_full_id);
7458 // transport_handle = GNUNET_TRANSPORT_connect(c,
7465 dht_handle = GNUNET_DHT_connect (c, 64);
7466 if (dht_handle == NULL)
7471 stats = GNUNET_STATISTICS_create ("mesh", c);
7475 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
7477 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
7478 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
7479 peers = GNUNET_CONTAINER_multihashmap_create (32);
7480 applications = GNUNET_CONTAINER_multihashmap_create (32);
7481 types = GNUNET_CONTAINER_multihashmap_create (32);
7483 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
7484 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
7485 GNUNET_SERVER_disconnect_notify (server_handle,
7486 &handle_local_client_disconnect, NULL);
7490 clients_tail = NULL;
7493 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
7494 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
7496 /* Create a peer_info for the local peer */
7497 peer = peer_info_get (&my_full_id);
7500 GNUNET_PEER_change_rc (myid, 1);
7501 peer_info_add_path (peer, p, GNUNET_YES);
7503 /* Scheduled the task to clean up when shutdown is called */
7504 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
7507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "end of run()\n");
7511 * The main function for the mesh service.
7513 * @param argc number of arguments from the command line
7514 * @param argv command line arguments
7515 * @return 0 ok, 1 on error
7518 main (int argc, char *const *argv)
7522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
7525 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
7527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");