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 %s\n",
1985 GNUNET_MESH_DEBUG_M2S (type));
1987 memcpy (cbuf, msg, sizeof (cbuf));
1988 switch (htons (msg->type))
1990 struct GNUNET_MESH_Unicast *uc;
1991 struct GNUNET_MESH_Multicast *mc;
1992 struct GNUNET_MESH_ToOrigin *to;
1994 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1995 uc = (struct GNUNET_MESH_Unicast *) cbuf;
1999 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
2000 mc = (struct GNUNET_MESH_Multicast *) cbuf;
2004 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2005 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
2013 t = tunnel_get (oid, ntohl (*tid));
2020 for (count = 0, c = clients; c != NULL; c = c->next)
2022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
2023 if (client_is_subscribed (type, c))
2025 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
2029 *tid = htonl (t->local_tid);
2033 if (GNUNET_NO == client_knows_tunnel (c, t))
2035 /* This client doesn't know the tunnel */
2036 struct GNUNET_MESH_TunnelNotification tmsg;
2037 struct GNUNET_HashCode hash;
2039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
2040 tmsg.header.size = htons (sizeof (tmsg));
2041 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2042 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
2043 tmsg.tunnel_id = htonl (t->local_tid_dest);
2044 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2045 &tmsg.header, GNUNET_NO);
2046 tunnel_add_client (t, c);
2047 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2049 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2050 c->incoming_tunnels, &hash, t,
2051 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2053 *tid = htonl (t->local_tid_dest);
2056 /* Check if the client wants to get traffic from the tunnel */
2057 if (GNUNET_NO == client_wants_tunnel(c, t))
2060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
2061 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2062 (struct GNUNET_MessageHeader
2063 *) cbuf, GNUNET_NO);
2071 * Notify the client that owns the tunnel that a peer has connected to it
2072 * (the requested path to it has been confirmed).
2074 * @param t Tunnel whose owner to notify
2075 * @param id Short id of the peer that has connected
2078 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
2080 struct GNUNET_MESH_PeerControl pc;
2082 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2083 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2084 pc.tunnel_id = htonl (t->local_tid);
2085 GNUNET_PEER_resolve (id, &pc.peer);
2086 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
2092 * Notify a the client of a tunnel about how many more
2093 * payload packages will we accept on a given tunnel,
2094 * distinguishing between root and leaf clients.
2096 * @param c Client whom to send the ACK.
2097 * @param t Tunnel on which to send the ACK.
2100 send_client_tunnel_ack (struct MeshClient *c, struct MeshTunnel *t)
2102 struct GNUNET_MESH_LocalAck msg;
2103 MESH_TunnelNumber tid;
2106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2107 "Sending client ACK on tunnel %X\n",
2112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " to client %u\n", c->id);
2116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (owner, FWD ACK)\n");
2117 ack = tunnel_get_fwd_ack (t);
2122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (leaf, BCK ACK)\n");
2123 ack = tunnel_get_bck_ack (t);
2124 tid = t->local_tid_dest;
2127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
2128 if (t->last_fwd_ack == ack)
2131 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
2132 t->last_fwd_ack = ack;
2133 msg.header.size = htons (sizeof (msg));
2134 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
2135 msg.tunnel_id = htonl (tid);
2136 msg.max_pid = htonl (ack);
2138 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2139 &msg.header, GNUNET_NO);
2144 * Notify all clients (not depending on registration status) that the incoming
2145 * tunnel is no longer valid.
2147 * @param t Tunnel that was destroyed.
2150 send_clients_tunnel_destroy (struct MeshTunnel *t)
2152 struct GNUNET_MESH_TunnelMessage msg;
2154 msg.header.size = htons (sizeof (msg));
2155 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2156 msg.tunnel_id = htonl (t->local_tid_dest);
2157 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
2162 * Notify clients of tunnel disconnections, if needed.
2163 * In case the origin disconnects, the destination clients get a tunnel destroy
2164 * notification. If the last destination disconnects (only one remaining client
2165 * in tunnel), the origin gets a (local ID) peer disconnected.
2166 * Note that the function must be called BEFORE removing the client from
2169 * @param t Tunnel that was destroyed.
2170 * @param c Client that disconnected.
2173 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2179 struct GNUNET_MESH_TunnelMessage msg;
2181 msg.header.size = htons (sizeof (msg));
2182 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2183 msg.tunnel_id = htonl (t->local_tid_dest);
2184 for (i = 0; i < t->nclients; i++)
2185 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2186 &msg.header, GNUNET_NO);
2188 // FIXME when to disconnect an incoming tunnel?
2189 else if (1 == t->nclients && NULL != t->owner)
2191 struct GNUNET_MESH_PeerControl msg;
2193 msg.header.size = htons (sizeof (msg));
2194 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2195 msg.tunnel_id = htonl (t->local_tid);
2196 msg.peer = my_full_id;
2197 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2198 &msg.header, GNUNET_NO);
2204 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2205 * and insert it in the appropiate structures if the peer is not known yet.
2207 * @param peer Full identity of the peer.
2209 * @return Existing or newly created peer info.
2211 static struct MeshPeerInfo *
2212 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2214 struct MeshPeerInfo *peer_info;
2216 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2217 if (NULL == peer_info)
2220 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2221 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2222 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2223 peer_info->id = GNUNET_PEER_intern (peer);
2231 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2232 * and insert it in the appropiate structures if the peer is not known yet.
2234 * @param peer Short identity of the peer.
2236 * @return Existing or newly created peer info.
2238 static struct MeshPeerInfo *
2239 peer_info_get_short (const GNUNET_PEER_Id peer)
2241 struct GNUNET_PeerIdentity id;
2243 GNUNET_PEER_resolve (peer, &id);
2244 return peer_info_get (&id);
2249 * Iterator to remove the tunnel from the list of tunnels a peer participates
2252 * @param cls Closure (tunnel info)
2253 * @param key GNUNET_PeerIdentity of the peer (unused)
2254 * @param value PeerInfo of the peer
2256 * @return always GNUNET_YES, to keep iterating
2259 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2261 struct MeshTunnel *t = cls;
2262 struct MeshPeerInfo *peer = value;
2265 for (i = 0; i < peer->ntunnels; i++)
2268 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2271 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2272 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2281 * Core callback to write a pre-constructed data packet to core buffer
2283 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2284 * @param size Number of bytes available in buf.
2285 * @param buf Where the to write the message.
2287 * @return number of bytes written to buf
2290 send_core_data_raw (void *cls, size_t size, void *buf)
2292 struct MeshTransmissionDescriptor *info = cls;
2293 struct GNUNET_MessageHeader *msg;
2296 GNUNET_assert (NULL != info);
2297 GNUNET_assert (NULL != info->mesh_data);
2298 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2299 total_size = ntohs (msg->size);
2301 if (total_size > size)
2306 memcpy (buf, msg, total_size);
2307 data_descriptor_decrement_rc (info->mesh_data);
2314 * Sends an already built non-multicast message to a peer,
2315 * properly registrating all used resources.
2317 * @param message Message to send. Function makes a copy of it.
2318 * @param peer Short ID of the neighbor whom to send the message.
2319 * @param t Tunnel on which this message is transmitted.
2322 send_message (const struct GNUNET_MessageHeader *message,
2323 const struct GNUNET_PeerIdentity *peer,
2324 struct MeshTunnel *t)
2326 struct MeshTransmissionDescriptor *info;
2327 struct MeshPeerInfo *neighbor;
2328 struct MeshPeerPath *p;
2332 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2334 size = ntohs (message->size);
2335 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2336 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2337 info->mesh_data->data = GNUNET_malloc (size);
2338 memcpy (info->mesh_data->data, message, size);
2339 type = ntohs(message->type);
2340 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2342 struct GNUNET_MESH_Unicast *m;
2344 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2345 m->ttl = htonl (ntohl (m->ttl) - 1);
2347 info->mesh_data->data_len = size;
2348 info->mesh_data->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2349 *info->mesh_data->reference_counter = 1;
2350 neighbor = peer_info_get (peer);
2351 for (p = neighbor->path_head; NULL != p; p = p->next)
2361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2362 " %s IS NOT DIRECTLY CONNECTED\n",
2364 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2367 for (p = neighbor->path_head; NULL != p; p = p->next)
2369 struct GNUNET_PeerIdentity debug_id;
2372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2373 " path with %u hops through:\n",
2375 for (i = 0; i < p->length; i++)
2377 GNUNET_PEER_resolve(p->peers[i], &debug_id);
2378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2380 i, GNUNET_i2s(&debug_id));
2384 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2385 GNUNET_free (info->mesh_data->data);
2386 GNUNET_free (info->mesh_data);
2390 info->peer = neighbor;
2391 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
2394 * TODO: in this case we only need the service to retransmit
2395 * the message down the path. If we pass the real type to queue_add,
2396 * queue_send will try to build the message from scratch. This can
2397 * probably be done by some other way instead of deleteing the type
2411 * Sends a CREATE PATH message for a path to a peer, properly registrating
2412 * all used resources.
2414 * @param peer PeerInfo of the final peer for whom this path is being created.
2415 * @param p Path itself.
2416 * @param t Tunnel for which the path is created.
2419 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2420 struct MeshTunnel *t)
2422 struct GNUNET_PeerIdentity id;
2423 struct MeshPathInfo *path_info;
2424 struct MeshPeerInfo *neighbor;
2430 p = tree_get_path_to_peer (t->tree, peer->id);
2437 for (i = 0; i < p->length; i++)
2439 if (p->peers[i] == myid)
2442 if (i >= p->length - 1)
2448 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2450 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2451 path_info->path = p;
2453 neighbor = peer_info_get (&id);
2454 path_info->peer = neighbor;
2455 queue_add (path_info,
2456 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2457 sizeof (struct GNUNET_MESH_ManipulatePath) +
2458 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2465 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2467 * @param t Tunnel whose path to destroy.
2468 * @param destination Short ID of the peer to whom the path to destroy.
2471 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2473 struct MeshPeerPath *p;
2476 p = tree_get_path_to_peer (t->tree, destination);
2482 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2483 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2485 struct GNUNET_MESH_ManipulatePath *msg;
2486 struct GNUNET_PeerIdentity *pi;
2490 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2491 msg->header.size = htons (size);
2492 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2493 msg->tid = htonl (t->id.tid);
2494 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2495 for (i = 0; i < p->length; i++)
2497 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2499 send_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2506 * Try to establish a new connection to this peer.
2507 * Use the best path for the given tunnel.
2508 * If the peer doesn't have any path to it yet, try to get one.
2509 * If the peer already has some path, send a CREATE PATH towards it.
2511 * @param peer PeerInfo of the peer.
2512 * @param t Tunnel for which to create the path, if possible.
2515 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2517 struct MeshPeerPath *p;
2518 struct MeshPathInfo *path_info;
2520 if (NULL != peer->path_head)
2522 p = tree_get_path_to_peer (t->tree, peer->id);
2529 // FIXME always send create path to self
2532 send_create_path (peer, p, t);
2536 struct GNUNET_HashCode hash;
2539 send_client_peer_connected (t, myid);
2540 t->local_tid_dest = next_local_tid++;
2541 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2544 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2545 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2552 else if (NULL == peer->dhtget)
2554 struct GNUNET_PeerIdentity id;
2556 GNUNET_PEER_resolve (peer->id, &id);
2557 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2558 path_info->peer = peer;
2560 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2561 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2562 peer->dhtgetcls = path_info;
2563 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2564 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2565 &id.hashPubKey, /* key to search */
2566 dht_replication_level, /* replication level */
2567 GNUNET_DHT_RO_RECORD_ROUTE |
2568 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2569 NULL, /* xquery */ // FIXME BLOOMFILTER
2570 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2571 &dht_get_id_handler, path_info);
2573 /* Otherwise, there is no path but the DHT get is already started. */
2578 * Task to delay the connection of a peer
2580 * @param cls Closure (path info with tunnel and peer to connect).
2581 * Will be free'd on exection.
2582 * @param tc TaskContext
2585 peer_info_connect_task (void *cls,
2586 const struct GNUNET_SCHEDULER_TaskContext *tc)
2588 struct MeshPathInfo *path_info = cls;
2590 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2595 peer_info_connect (path_info->peer, path_info->t);
2601 * Destroy the peer_info and free any allocated resources linked to it
2603 * @param pi The peer_info to destroy.
2605 * @return GNUNET_OK on success
2608 peer_info_destroy (struct MeshPeerInfo *pi)
2610 struct GNUNET_PeerIdentity id;
2611 struct MeshPeerPath *p;
2612 struct MeshPeerPath *nextp;
2614 GNUNET_PEER_resolve (pi->id, &id);
2615 GNUNET_PEER_change_rc (pi->id, -1);
2618 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2621 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2622 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2624 if (NULL != pi->dhtget)
2626 GNUNET_DHT_get_stop (pi->dhtget);
2627 GNUNET_free (pi->dhtgetcls);
2633 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2643 * Remove all paths that rely on a direct connection between p1 and p2
2644 * from the peer itself and notify all tunnels about it.
2646 * @param peer PeerInfo of affected peer.
2647 * @param p1 GNUNET_PEER_Id of one peer.
2648 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2651 * TODO: optimize (see below)
2654 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2657 struct MeshPeerPath *p;
2658 struct MeshPeerPath *aux;
2659 struct MeshPeerInfo *peer_d;
2661 unsigned int destroyed;
2666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2668 p = peer->path_head;
2672 for (i = 0; i < (p->length - 1); i++)
2674 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2675 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2677 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2688 for (i = 0; i < peer->ntunnels; i++)
2690 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2694 * Problem: one or more peers have been deleted from the tunnel tree.
2695 * We don't know who they are to try to add them again.
2696 * We need to try to find a new path for each of the disconnected peers.
2697 * Some of them might already have a path to reach them that does not
2698 * involve p1 and p2. Adding all anew might render in a better tree than
2699 * the trivial immediate fix.
2701 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2702 * its children will be reachable trough him.
2704 peer_d = peer_info_get_short (d);
2707 for (p = peer_d->path_head; NULL != p; p = p->next)
2709 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2717 /* No callback, as peer will be already disconnected and a connection
2718 * scheduled by tunnel_notify_connection_broken.
2720 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2724 peer_info_connect (peer_d, peer->tunnels[i]);
2727 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2732 * Add the path to the peer and update the path used to reach it in case this
2735 * @param peer_info Destination peer to add the path to.
2736 * @param path New path to add. Last peer must be the peer in arg 1.
2737 * Path will be either used of freed if already known.
2738 * @param trusted Do we trust that this path is real?
2741 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2744 struct MeshPeerPath *aux;
2748 if ((NULL == peer_info) || (NULL == path))
2751 path_destroy (path);
2754 if (path->peers[path->length - 1] != peer_info->id)
2757 path_destroy (path);
2760 if (path->length <= 2 && GNUNET_NO == trusted)
2762 /* Only allow CORE to tell us about direct paths */
2763 path_destroy (path);
2766 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2767 for (l = 1; l < path->length; l++)
2769 if (path->peers[l] == myid)
2771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2772 for (l2 = 0; l2 < path->length - l; l2++)
2774 path->peers[l2] = path->peers[l + l2];
2779 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2784 struct GNUNET_PeerIdentity id;
2786 GNUNET_PEER_resolve (peer_info->id, &id);
2787 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2788 path->length, GNUNET_i2s (&id));
2791 l = path_get_length (path);
2798 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2799 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2801 l2 = path_get_length (aux);
2804 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2805 peer_info->path_tail, aux, path);
2810 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2812 path_destroy (path);
2817 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2824 * Add the path to the origin peer and update the path used to reach it in case
2825 * this is the shortest.
2826 * The path is given in peer_info -> destination, therefore we turn the path
2827 * upside down first.
2829 * @param peer_info Peer to add the path to, being the origin of the path.
2830 * @param path New path to add after being inversed.
2831 * @param trusted Do we trust that this path is real?
2834 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2835 struct MeshPeerPath *path, int trusted)
2838 peer_info_add_path (peer_info, path, trusted);
2843 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2844 * to obtain a local peer -> destination path and interning the peer ids.
2846 * @return Newly allocated and created path
2848 static struct MeshPeerPath *
2849 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2850 unsigned int get_path_length,
2851 const struct GNUNET_PeerIdentity *put_path,
2852 unsigned int put_path_length)
2854 struct MeshPeerPath *p;
2860 GNUNET_PEER_change_rc (myid, 1);
2861 i = get_path_length;
2862 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2863 for (i--; i >= 0; i--)
2865 id = GNUNET_PEER_intern (&get_path[i]);
2866 if (p->length > 0 && id == p->peers[p->length - 1])
2868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2869 GNUNET_PEER_change_rc (id, -1);
2873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2874 GNUNET_i2s (&get_path[i]));
2876 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2877 p->peers[p->length - 1] = id;
2880 i = put_path_length;
2881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2882 for (i--; i >= 0; i--)
2884 id = GNUNET_PEER_intern (&put_path[i]);
2887 /* PUT path went through us, so discard the path up until now and start
2888 * from here to get a much shorter (and loop-free) path.
2893 if (p->length > 0 && id == p->peers[p->length - 1])
2895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2896 GNUNET_PEER_change_rc (id, -1);
2900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2901 GNUNET_i2s (&put_path[i]));
2903 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2904 p->peers[p->length - 1] = id;
2908 if (get_path_length > 0)
2909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2910 GNUNET_i2s (&get_path[0]));
2911 if (put_path_length > 0)
2912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2913 GNUNET_i2s (&put_path[0]));
2914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2916 for (i = 0; i < p->length; i++)
2918 struct GNUNET_PeerIdentity peer_id;
2920 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2922 GNUNET_i2s (&peer_id));
2930 * Adds a path to the peer_infos of all the peers in the path
2932 * @param p Path to process.
2933 * @param confirmed Whether we know if the path works or not.
2936 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2940 /* TODO: invert and add */
2941 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2942 for (i++; i < p->length; i++)
2944 struct MeshPeerInfo *aux;
2945 struct MeshPeerPath *copy;
2947 aux = peer_info_get_short (p->peers[i]);
2948 copy = path_duplicate (p);
2949 copy->length = i + 1;
2950 peer_info_add_path (aux, copy, GNUNET_NO);
2956 * Send keepalive packets for a peer
2958 * @param cls Closure (tunnel for which to send the keepalive).
2959 * @param tc Notification context.
2961 * TODO: implement explicit multicast keepalive?
2964 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2968 * Search for a tunnel among the incoming tunnels
2970 * @param tid the local id of the tunnel
2972 * @return tunnel handler, NULL if doesn't exist
2974 static struct MeshTunnel *
2975 tunnel_get_incoming (MESH_TunnelNumber tid)
2977 struct GNUNET_HashCode hash;
2979 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2980 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2981 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2986 * Search for a tunnel among the tunnels for a client
2988 * @param c the client whose tunnels to search in
2989 * @param tid the local id of the tunnel
2991 * @return tunnel handler, NULL if doesn't exist
2993 static struct MeshTunnel *
2994 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2996 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2998 return tunnel_get_incoming (tid);
3002 struct GNUNET_HashCode hash;
3004 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3005 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
3011 * Search for a tunnel by global ID using PEER_ID
3013 * @param pi owner of the tunnel
3014 * @param tid global tunnel number
3016 * @return tunnel handler, NULL if doesn't exist
3018 static struct MeshTunnel *
3019 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
3021 struct MESH_TunnelID id;
3022 struct GNUNET_HashCode hash;
3027 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
3028 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
3033 * Search for a tunnel by global ID using full PeerIdentities
3035 * @param oid owner of the tunnel
3036 * @param tid global tunnel number
3038 * @return tunnel handler, NULL if doesn't exist
3040 static struct MeshTunnel *
3041 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
3043 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
3048 * Delete an active client from the tunnel.
3054 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
3058 for (i = 0; i < t->nclients; i++)
3060 if (t->clients[i] == c)
3062 t->clients[i] = t->clients[t->nclients - 1];
3063 t->clients_fc[i] = t->clients_fc[t->nclients - 1];
3064 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
3066 GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
3074 * Delete an ignored client from the tunnel.
3080 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
3084 for (i = 0; i < t->nignore; i++)
3086 if (t->ignore[i] == c)
3088 t->ignore[i] = t->ignore[t->nignore - 1];
3089 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
3097 * Delete a client from the tunnel. It should be only done on
3098 * client disconnection, otherwise use client_ignore_tunnel.
3104 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
3106 tunnel_delete_ignored_client (t, c);
3107 tunnel_delete_active_client (t, c);
3112 * Iterator to free MeshTunnelChildInfo of tunnel children.
3114 * @param cls Closure (tunnel info).
3115 * @param key Hash of GNUNET_PEER_Id (unused).
3116 * @param value MeshTunnelChildInfo of the child.
3118 * @return always GNUNET_YES, to keep iterating
3121 tunnel_destroy_child (void *cls,
3122 const struct GNUNET_HashCode * key,
3125 GNUNET_free (value);
3131 * Callback used to notify a client owner of a tunnel that a peer has
3132 * disconnected, most likely because of a path change.
3134 * @param cls Closure (tunnel this notification is about).
3135 * @param peer_id Short ID of disconnected peer.
3138 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
3140 struct MeshTunnel *t = cls;
3141 struct MeshPeerInfo *peer;
3142 struct MeshPathInfo *path_info;
3144 if (NULL != t->owner && NULL != nc)
3146 struct GNUNET_MESH_PeerControl msg;
3148 msg.header.size = htons (sizeof (msg));
3149 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
3150 msg.tunnel_id = htonl (t->local_tid);
3151 GNUNET_PEER_resolve (peer_id, &msg.peer);
3152 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3153 &msg.header, GNUNET_NO);
3155 peer = peer_info_get_short (peer_id);
3156 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
3157 path_info->peer = peer;
3159 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
3164 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
3165 * needed rescources.
3166 * If peer already exists, reevaluate shortest path and change if different.
3168 * @param t Tunnel we want to add a new peer to
3169 * @param peer PeerInfo of the peer being added
3173 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
3175 struct GNUNET_PeerIdentity id;
3176 struct MeshPeerPath *best_p;
3177 struct MeshPeerPath *p;
3178 unsigned int best_cost;
3181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
3182 GNUNET_PEER_resolve (peer->id, &id);
3184 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
3187 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
3188 GNUNET_assert (GNUNET_OK ==
3189 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
3191 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3194 if (NULL != (p = peer->path_head))
3197 best_cost = tree_get_path_cost (t->tree, p);
3200 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
3207 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
3208 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
3209 t->path_refresh_task =
3210 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3214 /* Start a DHT get */
3215 peer_info_connect (peer, t);
3217 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3221 * Add a path to a tunnel which we don't own, just to remember the next hop.
3222 * If destination node was already in the tunnel, the first hop information
3223 * will be replaced with the new path.
3225 * @param t Tunnel we want to add a new peer to
3226 * @param p Path to add
3227 * @param own_pos Position of local node in path.
3231 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3232 unsigned int own_pos)
3234 struct GNUNET_PeerIdentity id;
3236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3237 GNUNET_assert (0 != own_pos);
3238 tree_add_path (t->tree, p, NULL, NULL);
3239 if (own_pos < p->length - 1)
3241 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3242 tree_update_first_hops (t->tree, myid, &id);
3244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3248 * Add a client to a tunnel, initializing all needed data structures.
3250 * @param t Tunnel to which add the client.
3251 * @param c Client which to add to the tunnel.
3254 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
3256 struct MeshTunnelClientInfo clinfo;
3258 GNUNET_array_append (t->clients, t->nclients, c);
3259 clinfo.fwd_ack = t->fwd_pid + 1;
3260 clinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3261 clinfo.fwd_pid = t->fwd_pid;
3262 clinfo.bck_pid = (uint32_t) -1; // Expected next: 0
3264 GNUNET_array_append (t->clients_fc, t->nclients, clinfo);
3269 * Notifies a tunnel that a connection has broken that affects at least
3270 * some of its peers. Sends a notification towards the root of the tree.
3271 * In case the peer is the owner of the tree, notifies the client that owns
3272 * the tunnel and tries to reconnect.
3274 * @param t Tunnel affected.
3275 * @param p1 Peer that got disconnected from p2.
3276 * @param p2 Peer that got disconnected from p1.
3278 * @return Short ID of the peer disconnected (either p1 or p2).
3279 * 0 if the tunnel remained unaffected.
3281 static GNUNET_PEER_Id
3282 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3288 tree_notify_connection_broken (t->tree, p1, p2,
3289 &tunnel_notify_client_peer_disconnected,
3291 if (myid != p1 && myid != p2)
3297 if (tree_get_predecessor (t->tree) != 0)
3299 /* We are the peer still connected, notify owner of the disconnection. */
3300 struct GNUNET_MESH_PathBroken msg;
3301 struct GNUNET_PeerIdentity neighbor;
3303 msg.header.size = htons (sizeof (msg));
3304 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3305 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3306 msg.tid = htonl (t->id.tid);
3307 msg.peer1 = my_full_id;
3308 GNUNET_PEER_resolve (pid, &msg.peer2);
3309 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3310 send_message (&msg.header, &neighbor, t);
3318 * Send a multicast packet to a neighbor.
3320 * @param cls Closure (Info about the multicast packet)
3321 * @param neighbor_id Short ID of the neighbor to send the packet to.
3324 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3326 struct MeshData *mdata = cls;
3327 struct MeshTransmissionDescriptor *info;
3328 struct GNUNET_PeerIdentity neighbor;
3330 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3332 info->mesh_data = mdata;
3333 (*(mdata->reference_counter)) ++;
3334 info->destination = neighbor_id;
3335 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3337 GNUNET_i2s (&neighbor));
3338 info->peer = peer_info_get (&neighbor);
3339 GNUNET_assert (NULL != info->peer);
3341 GNUNET_MESSAGE_TYPE_MESH_MULTICAST,
3342 info->mesh_data->data_len,
3349 * Send a message in a tunnel in multicast, sending a copy to each child node
3350 * down the local one in the tunnel tree.
3352 * @param t Tunnel in which to send the data.
3353 * @param msg Message to be sent.
3354 * @param internal Has the service generated this message?
3357 tunnel_send_multicast (struct MeshTunnel *t,
3358 const struct GNUNET_MessageHeader *msg,
3361 struct MeshData *mdata;
3363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3364 " sending a multicast packet...\n");
3365 mdata = GNUNET_malloc (sizeof (struct MeshData));
3366 mdata->data_len = ntohs (msg->size);
3367 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
3369 mdata->data = GNUNET_malloc (mdata->data_len);
3370 memcpy (mdata->data, msg, mdata->data_len);
3371 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3373 struct GNUNET_MESH_Multicast *mcast;
3375 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3376 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3378 ntohl (mcast->ttl));
3382 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3384 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
3385 && GNUNET_NO == internal)
3387 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
3389 GNUNET_SCHEDULER_add_delayed (unacknowledged_wait_time, &client_allow_send,
3391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
3395 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3396 if (*(mdata->reference_counter) == 0)
3398 GNUNET_free (mdata->data);
3399 GNUNET_free (mdata->reference_counter);
3400 if (NULL != mdata->task)
3402 GNUNET_SCHEDULER_cancel(*(mdata->task));
3403 GNUNET_free (mdata->task);
3404 GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
3406 // FIXME change order?
3407 GNUNET_free (mdata);
3409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3410 " sending a multicast packet done\n");
3416 * Increase the SKIP value of all peers that
3417 * have not received a unicast message.
3419 * @param cls Closure (ID of the peer that HAS received the message).
3420 * @param key ID of the neighbor.
3421 * @param value Information about the neighbor.
3423 * @return GNUNET_YES to keep iterating.
3426 tunnel_add_skip (void *cls,
3427 const struct GNUNET_HashCode * key,
3430 struct GNUNET_PeerIdentity *neighbor = cls;
3431 struct MeshTunnelChildInfo *cinfo = value;
3433 /* TODO compare only pointers? key == neighbor? */
3434 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3444 * @brief Get neighbor's Flow Control information.
3446 * Retrieves the MeshTunnelChildInfo containing Flow Control data about a direct
3447 * descendant of the local node in a certain tunnel.
3448 * If the info is not yet there (recently created path), creates the data struct
3449 * and inserts it into the tunnel info, initialized to the current tunnel ACK
3452 * @param t Tunnel related.
3453 * @param peer Neighbor whose Flow Control info is needed.
3455 * @return Neighbor's Flow Control info.
3457 static struct MeshTunnelChildInfo *
3458 tunnel_get_neighbor_fc (const struct MeshTunnel *t,
3459 const struct GNUNET_PeerIdentity *peer)
3461 struct MeshTunnelChildInfo *cinfo;
3462 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3468 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3469 cinfo->id = GNUNET_PEER_intern (peer);
3470 cinfo->skip = t->fwd_pid;
3472 delta = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3473 cinfo->fwd_ack = t->fwd_pid + delta;
3474 cinfo->bck_ack = delta;
3476 GNUNET_assert (GNUNET_OK ==
3477 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
3480 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3487 * Get the Flow Control info of a client.
3489 * @param t Tunnel on which to look.
3490 * @param c Client whose ACK to get.
3492 * @return ACK value.
3494 static struct MeshTunnelClientInfo *
3495 tunnel_get_client_fc (struct MeshTunnel *t,
3496 struct MeshClient *c)
3500 for (i = 0; i < t->nclients; i++)
3502 if (t->clients[i] != c)
3504 return &t->clients_fc[i];
3507 return NULL; // avoid compiler / coverity complaints
3512 * Iterator to get the appropiate ACK value from all children nodes.
3514 * @param cls Closue (tunnel).
3515 * @param id Id of the child node.
3518 tunnel_get_child_fwd_ack (void *cls,
3521 struct GNUNET_PeerIdentity peer_id;
3522 struct MeshTunnelChildInfo *cinfo;
3523 struct MeshTunnelChildIteratorContext *ctx = cls;
3524 struct MeshTunnel *t = ctx->t;
3527 GNUNET_PEER_resolve (id, &peer_id);
3528 cinfo = tunnel_get_neighbor_fc (t, &peer_id);
3529 ack = cinfo->fwd_ack;
3531 if (GNUNET_NO == ctx->init)
3533 ctx->max_child_ack = ack;
3534 ctx->init = GNUNET_YES;
3537 if (GNUNET_YES == t->speed_min)
3539 ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
3543 ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
3550 * Get the maximum PID allowed to transmit to any
3551 * tunnel child of the local peer, depending on the tunnel
3552 * buffering/speed settings.
3556 * @return Maximum PID allowed (uint32 MAX), -1 if node has no children.
3559 tunnel_get_children_fwd_ack (struct MeshTunnel *t)
3561 struct MeshTunnelChildIteratorContext ctx;
3563 ctx.max_child_ack = 0;
3565 tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
3567 if (0 == ctx.nchildren)
3570 if (GNUNET_YES == t->nobuffer && is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
3571 ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
3573 return (int64_t) ctx.max_child_ack;
3578 * Set the FWD ACK value of a client in a particular tunnel.
3580 * @param t Tunnel affected.
3581 * @param c Client whose ACK to set.
3582 * @param ack ACK value.
3585 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
3586 struct MeshClient *c,
3591 for (i = 0; i < t->nclients; i++)
3593 if (t->clients[i] != c)
3595 t->clients_fc[i].fwd_ack = ack;
3603 * Get the highest ACK value of all clients in a particular tunnel,
3604 * according to the buffering/speed settings.
3606 * @param t Tunnel on which to look.
3608 * @return Corresponding ACK value (max uint32_t).
3609 * If no clients are suscribed, -1.
3612 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
3617 if (0 == t->nclients)
3620 for (ack = -1, i = 0; i < t->nclients; i++)
3623 (GNUNET_YES == t->speed_min &&
3624 GNUNET_YES == is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
3625 (GNUNET_NO == t->speed_min &&
3626 GNUNET_YES == is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
3628 ack = t->clients_fc[i].fwd_ack;
3632 if (GNUNET_YES == t->nobuffer && is_pid_bigger(ack, t->fwd_pid))
3633 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
3635 return (uint32_t) ack;
3640 * Get the current fwd ack value for a tunnel, taking in account the tunnel
3641 * mode and the status of all children nodes.
3645 * @return Maximum PID allowed.
3648 tunnel_get_fwd_ack (struct MeshTunnel *t)
3651 uint32_t buffer_free;
3656 count = t->fwd_pid - t->skip;
3657 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
3658 ack = count + buffer_free; // Might overflow 32 bits, it's ok!
3659 child_ack = tunnel_get_children_fwd_ack (t);
3660 client_ack = tunnel_get_clients_fwd_ack (t);
3661 if (-1 == child_ack)
3663 // Node has no children, child_ack AND core buffer are irrelevant.
3664 GNUNET_break (-1 != client_ack); // No children AND no clients? Not good!
3665 return (uint32_t) client_ack;
3668 if (GNUNET_YES == t->speed_min)
3670 ack = min_pid ((uint32_t) child_ack, ack);
3671 ack = min_pid ((uint32_t) client_ack, ack);
3675 ack = max_pid ((uint32_t) child_ack, ack);
3676 ack = max_pid ((uint32_t) client_ack, ack);
3678 if (GNUNET_YES == t->nobuffer && is_pid_bigger(ack, t->fwd_pid))
3679 ack = t->fwd_pid + 1; // Might overflow 32 bits, it's ok!
3680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "c %u, bf %u, ch %u, cl %u, ACK: %u\n",
3681 count, buffer_free, child_ack, client_ack, ack);
3686 * Get the current bck ack value for a tunnel, taking in account the tunnel
3687 * mode and the status of all children nodes.
3691 * @return Maximum PID allowed.
3694 tunnel_get_bck_ack (struct MeshTunnel *t)
3698 if (GNUNET_YES == t->nobuffer)
3700 if (t->bck_ack > t->bck_pid)
3702 return t->bck_pid + 1;
3709 ack = t->bck_pid + t->bck_queue_max - t->bck_queue_n;
3716 send_local_ack (struct MeshClient *c, struct MeshTunnel *t, uint32_t ack)
3718 struct GNUNET_MESH_LocalAck msg;
3720 msg.header.size = htons (sizeof (msg));
3721 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
3722 msg.tunnel_id = htonl (t->local_tid_dest);
3723 msg.max_pid = htonl (ack);
3724 GNUNET_SERVER_notification_context_unicast(nc,
3731 * Build an ACK message and send it to the given peer.
3734 send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
3736 struct GNUNET_MESH_ACK msg;
3738 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3739 msg.header.size = htons (sizeof (msg));
3740 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3741 msg.pid = htonl (ack);
3742 msg.tid = htonl (t->id.tid);
3744 send_message (&msg.header, peer, t);
3749 * Send an ACK informing the predecessor about the available buffer space.
3750 * In case there is no predecessor, inform the owning client.
3751 * If buffering is off, send only on behalf of children or self if endpoint.
3752 * If buffering is on, send when sent to children and buffer space is free.
3753 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
3754 * the ACK itself goes "back" (towards root).
3756 * @param t Tunnel on which to send the ACK.
3757 * @param type Type of message that triggered the ACK transmission.
3760 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
3762 struct GNUNET_PeerIdentity id;
3765 if (NULL != t->owner)
3767 send_client_tunnel_ack (t->owner, t);
3770 /* Is it after unicast / multicast retransmission? */
3773 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3774 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3776 "ACK due to FWD DATA retransmission\n");
3777 if (GNUNET_YES == t->nobuffer)
3779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3782 if (t->fwd_queue_max > t->fwd_queue_n * 2)
3784 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3788 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3789 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3795 /* Ok, ACK might be necessary, what PID to ACK? */
3796 ack = tunnel_get_fwd_ack (t);
3798 /* If speed_min and not all children have ack'd, dont send yet */
3799 if (ack == t->last_fwd_ack)
3801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
3805 t->last_fwd_ack = ack;
3806 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3807 send_ack (t, &id, ack);
3812 * Iterator to send a child node a BCK ACK to allow him to send more
3815 * @param cls Closure (tunnel).
3816 * @param id Id of the child node.
3819 tunnel_send_child_bck_ack (void *cls,
3822 struct MeshTunnel *t = cls;
3823 struct MeshTunnelChildInfo *cinfo;
3824 struct GNUNET_PeerIdentity peer;
3826 GNUNET_PEER_resolve (id, &peer);
3827 cinfo = tunnel_get_neighbor_fc (t, &peer);
3829 if (cinfo->bck_ack != cinfo->pid &&
3830 GNUNET_NO == is_pid_bigger (cinfo->bck_ack, cinfo->pid))
3834 send_ack (t, &peer, cinfo->bck_ack);
3839 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
3841 * Iterates over all clients and sends BCK ACKs to the ones that need it.
3843 * @param t Tunnel on which to send the BCK ACKs.
3846 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
3850 /* Find client whom to allow to send to origin (with lowest buffer space) */
3851 for (i = 0; i < t->nclients; i++)
3853 struct MeshTunnelClientInfo *clinfo;
3856 clinfo = &t->clients_fc[i];
3857 delta = clinfo->bck_ack - clinfo->bck_pid;
3859 if ((GNUNET_NO == t->nobuffer && ACK_THRESHOLD > delta) ||
3860 (GNUNET_YES == t->nobuffer && 0 == delta))
3864 ack = clinfo->bck_pid;
3865 ack += t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3866 send_local_ack(t->clients[i], t, ack);
3867 clinfo->bck_ack = ack;
3874 * Send an ACK informing the children nodes and destination clients about
3875 * the available buffer space.
3876 * If buffering is off, send only on behalf of root (can be self).
3877 * If buffering is on, send when sent to predecessor and buffer space is free.
3878 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
3879 * the ACK itself goes "forward" (towards children/clients).
3881 * @param t Tunnel on which to send the ACK.
3882 * @param type Type of message that triggered the ACK transmission.
3885 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
3887 if (NULL != t->owner)
3889 send_client_tunnel_ack (t->owner, t);
3892 /* Is it after data to_origin retransmission? */
3895 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3897 "ACK due to BCK DATA retransmission\n");
3898 if (GNUNET_YES == t->nobuffer)
3900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3903 if (t->bck_queue_max > t->bck_queue_n * 2)
3905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3909 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3910 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3916 tunnel_send_clients_bck_ack (t);
3917 tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, NULL);
3922 * Send a message to all peers in this tunnel that the tunnel is no longer
3925 * @param t The tunnel whose peers to notify.
3928 tunnel_send_destroy (struct MeshTunnel *t)
3930 struct GNUNET_MESH_TunnelDestroy msg;
3932 msg.header.size = htons (sizeof (msg));
3933 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3934 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3935 msg.tid = htonl (t->id.tid);
3936 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
3941 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
3943 * @param cls Closure (Tunnel which to cancel).
3944 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
3947 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
3949 struct MeshTunnel *t = cls;
3950 struct MeshPeerInfo *peer_info;
3951 struct MeshPeerQueue *pq;
3952 struct MeshPeerQueue *next;
3954 peer_info = peer_info_get_short (neighbor_id);
3955 for (pq = peer_info->queue_head; NULL != pq; pq = next)
3958 if (pq->tunnel == t)
3960 queue_destroy (pq, GNUNET_YES);
3963 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
3965 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
3966 peer_info->core_transmit = NULL;
3971 * Destroy the tunnel and free any allocated resources linked to it.
3973 * @param t the tunnel to destroy
3975 * @return GNUNET_OK on success
3978 tunnel_destroy (struct MeshTunnel *t)
3980 struct MeshClient *c;
3981 struct GNUNET_HashCode hash;
3988 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
3994 struct GNUNET_PeerIdentity id;
3996 GNUNET_PEER_resolve (t->id.oid, &id);
3997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3998 GNUNET_i2s (&id), t->id.tid);
4000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4004 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4005 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
4010 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4013 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
4017 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4018 for (i = 0; i < t->nclients; i++)
4022 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
4027 for (i = 0; i < t->nignore; i++)
4031 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
4036 if (t->nclients > 0)
4039 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
4043 GNUNET_free (t->clients);
4045 if (NULL != t->peers)
4047 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
4049 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
4052 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4053 &tunnel_destroy_child,
4055 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
4057 tree_destroy (t->tree);
4059 if (NULL != t->regex_ctx)
4060 regex_cancel_search (t->regex_ctx);
4061 if (NULL != t->dht_get_type)
4062 GNUNET_DHT_get_stop (t->dht_get_type);
4063 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4064 GNUNET_SCHEDULER_cancel (t->timeout_task);
4065 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
4066 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
4069 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
4070 GNUNET_assert (0 <= n_tunnels);
4077 * Create a new tunnel
4079 * @param owner Who is the owner of the tunnel (short ID).
4080 * @param tid Tunnel Number of the tunnel.
4081 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
4082 * @param local Tunnel Number for the tunnel, for the client point of view.
4084 * @return A new initialized tunnel. NULL on error.
4086 static struct MeshTunnel *
4087 tunnel_new (GNUNET_PEER_Id owner,
4088 MESH_TunnelNumber tid,
4089 struct MeshClient *client,
4090 MESH_TunnelNumber local)
4092 struct MeshTunnel *t;
4093 struct GNUNET_HashCode hash;
4095 if (n_tunnels >= max_tunnels && NULL == client)
4098 t = GNUNET_malloc (sizeof (struct MeshTunnel));
4101 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
4102 t->bck_queue_max = t->fwd_queue_max;
4103 t->tree = tree_new (owner);
4105 t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
4106 t->bck_pid = (uint32_t) -1; // Next (expected) = 0
4107 t->bck_ack = INITIAL_WINDOW_SIZE - 1;
4108 t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
4109 t->local_tid = local;
4110 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8);
4112 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
4114 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4116 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
4117 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4124 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4131 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4133 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
4134 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4138 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4148 * Removes an explicit path from a tunnel, freeing all intermediate nodes
4149 * that are no longer needed, as well as nodes of no longer reachable peers.
4150 * The tunnel itself is also destoyed if results in a remote empty tunnel.
4152 * @param t Tunnel from which to remove the path.
4153 * @param peer Short id of the peer which should be removed.
4156 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
4158 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
4164 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
4165 * client when the client disconnects. If the client is not the owner, the
4166 * owner will get notified if no more clients are in the tunnel and the client
4167 * get removed from the tunnel's list.
4169 * @param cls closure (client that is disconnecting)
4170 * @param key the hash of the local tunnel id (used to access the hashmap)
4171 * @param value the value stored at the key (tunnel to destroy)
4173 * @return GNUNET_OK on success
4176 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
4178 struct MeshTunnel *t = value;
4179 struct MeshClient *c = cls;
4182 send_client_tunnel_disconnect(t, c);
4185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4186 "Client %u is destination, keeping the tunnel alive.\n", c->id);
4187 tunnel_delete_client(t, c);
4188 client_delete_tunnel(c, t);
4191 tunnel_send_destroy(t);
4192 r = tunnel_destroy (t);
4198 * Timeout function, destroys tunnel if called
4200 * @param cls Closure (tunnel to destroy).
4201 * @param tc TaskContext
4204 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4206 struct MeshTunnel *t = cls;
4208 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4210 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4215 * Resets the tunnel timeout. Starts it if no timeout was running.
4217 * @param t Tunnel whose timeout to reset.
4219 * TODO use heap to improve efficiency of scheduler.
4222 tunnel_reset_timeout (struct MeshTunnel *t)
4224 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4225 GNUNET_SCHEDULER_cancel (t->timeout_task);
4227 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
4228 (refresh_path_time, 4), &tunnel_timeout, t);
4232 /******************************************************************************/
4233 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4234 /******************************************************************************/
4237 * Function to send a create path packet to a peer.
4239 * @param cls closure
4240 * @param size number of bytes available in buf
4241 * @param buf where the callee should write the message
4242 * @return number of bytes written to buf
4245 send_core_path_create (void *cls, size_t size, void *buf)
4247 struct MeshPathInfo *info = cls;
4248 struct GNUNET_MESH_ManipulatePath *msg;
4249 struct GNUNET_PeerIdentity *peer_ptr;
4250 struct MeshTunnel *t = info->t;
4251 struct MeshPeerPath *p = info->path;
4256 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
4258 sizeof (struct GNUNET_MESH_ManipulatePath) +
4259 p->length * sizeof (struct GNUNET_PeerIdentity);
4261 if (size < size_needed || NULL == buf)
4266 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
4267 msg->header.size = htons (size_needed);
4268 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
4269 msg->tid = ntohl (t->id.tid);
4271 if (GNUNET_YES == t->speed_min)
4272 opt = MESH_TUNNEL_OPT_SPEED_MIN;
4273 if (GNUNET_YES == t->nobuffer)
4274 opt |= MESH_TUNNEL_OPT_NOBUFFER;
4275 msg->opt = htonl(opt);
4277 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
4278 for (i = 0; i < p->length; i++)
4280 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
4286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4287 "CREATE PATH (%u bytes long) sent!\n", size_needed);
4293 * Fill the core buffer
4295 * @param cls closure (data itself)
4296 * @param size number of bytes available in buf
4297 * @param buf where the callee should write the message
4299 * @return number of bytes written to buf
4302 send_core_data_multicast (void *cls, size_t size, void *buf)
4304 struct MeshTransmissionDescriptor *info = cls;
4307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
4308 GNUNET_assert (NULL != info);
4309 GNUNET_assert (NULL != info->peer);
4310 total_size = info->mesh_data->data_len;
4311 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
4313 if (total_size > size)
4318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
4319 memcpy (buf, info->mesh_data->data, total_size);
4322 struct GNUNET_MESH_Multicast *mc;
4323 struct GNUNET_MessageHeader *mh;
4326 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
4328 mc = (struct GNUNET_MESH_Multicast *) mh;
4329 mh = (struct GNUNET_MessageHeader *) &mc[1];
4330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4331 " multicast, payload type %s\n",
4332 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4334 " multicast, payload size %u\n", ntohs (mh->size));
4338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %s\n",
4339 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4343 data_descriptor_decrement_rc (info->mesh_data);
4344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
4346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
4352 * Creates a path ack message in buf and frees all unused resources.
4354 * @param cls closure (MeshTransmissionDescriptor)
4355 * @param size number of bytes available in buf
4356 * @param buf where the callee should write the message
4357 * @return number of bytes written to buf
4360 send_core_path_ack (void *cls, size_t size, void *buf)
4362 struct MeshTransmissionDescriptor *info = cls;
4363 struct GNUNET_MESH_PathACK *msg = buf;
4365 GNUNET_assert (NULL != info);
4366 if (sizeof (struct GNUNET_MESH_PathACK) > size)
4371 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
4372 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
4373 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
4374 msg->tid = htonl (info->origin->tid);
4375 msg->peer_id = my_full_id;
4378 /* TODO add signature */
4380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
4381 return sizeof (struct GNUNET_MESH_PathACK);
4386 * Free a transmission that was already queued with all resources
4387 * associated to the request.
4389 * @param queue Queue handler to cancel.
4390 * @param clear_cls Is it necessary to free associated cls?
4393 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4395 struct MeshTransmissionDescriptor *dd;
4396 struct MeshPathInfo *path_info;
4398 if (GNUNET_YES == clear_cls)
4400 switch (queue->type)
4402 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4403 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4404 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
4407 data_descriptor_decrement_rc (dd->mesh_data);
4409 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
4411 path_info = queue->cls;
4412 path_destroy (path_info->path);
4416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
4418 GNUNET_free_non_null (queue->cls);
4420 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
4421 queue->peer->queue_tail,
4423 GNUNET_free (queue);
4428 * Core callback to write a queued packet to core buffer
4430 * @param cls Closure (peer info).
4431 * @param size Number of bytes available in buf.
4432 * @param buf Where the to write the message.
4434 * @return number of bytes written to buf
4437 queue_send (void *cls, size_t size, void *buf)
4439 struct MeshPeerInfo *peer = cls;
4440 struct GNUNET_MessageHeader *msg;
4441 struct MeshPeerQueue *queue;
4442 struct MeshTunnel *t;
4445 peer->core_transmit = NULL;
4446 queue = peer->queue_head;
4448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
4450 /* If queue is empty, send should have been cancelled */
4456 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
4458 /* Check if buffer size is enough for the message */
4459 if (queue->size > size)
4461 struct GNUNET_PeerIdentity id;
4463 GNUNET_PEER_resolve (peer->id, &id);
4464 peer->core_transmit =
4465 GNUNET_CORE_notify_transmit_ready(core_handle,
4468 GNUNET_TIME_UNIT_FOREVER_REL,
4475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
4478 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
4481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* unicast: %u\n");
4483 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
4486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
4490 switch (queue->type)
4493 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4494 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
4495 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
4496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4497 "********* raw: %u\n",
4500 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4501 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4502 data_size = send_core_data_raw (queue->cls, size, buf);
4503 msg = (struct GNUNET_MessageHeader *) buf;
4504 switch (ntohs (msg->type)) // Type of preconstructed message
4506 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4507 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
4509 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4510 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4516 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
4518 data_size = send_core_data_multicast(queue->cls, size, buf);
4519 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
4521 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
4523 data_size = send_core_path_create(queue->cls, size, buf);
4525 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
4526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
4527 data_size = send_core_path_ack(queue->cls, size, buf);
4531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4532 "********* type unknown: %u\n",
4537 /* Free queue, but cls was freed by send_core_* */
4538 queue_destroy (queue, GNUNET_NO);
4540 if (GNUNET_YES == t->destroy && 0 == t->fwd_queue_n)
4542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
4546 /* If more data in queue, send next */
4547 if (NULL != peer->queue_head)
4549 struct GNUNET_PeerIdentity id;
4551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
4552 GNUNET_PEER_resolve (peer->id, &id);
4553 peer->core_transmit =
4554 GNUNET_CORE_notify_transmit_ready(core_handle,
4557 GNUNET_TIME_UNIT_FOREVER_REL,
4559 peer->queue_head->size,
4563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
4569 * Queue and pass message to core when possible.
4571 * @param cls Closure (type dependant).
4572 * @param type Type of the message, 0 for a raw message.
4573 * @param size Size of the message.
4574 * @param dst Neighbor to send message to.
4575 * @param t Tunnel this message belongs to.
4578 queue_add (void *cls, uint16_t type, size_t size,
4579 struct MeshPeerInfo *dst, struct MeshTunnel *t)
4581 struct MeshPeerQueue *queue;
4586 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
4587 GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
4589 n = &t->fwd_queue_n;
4590 max = &t->fwd_queue_max;
4592 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
4594 n = &t->bck_queue_n;
4595 max = &t->bck_queue_max;
4600 if (NULL == t->owner)
4601 GNUNET_break_op(0); // TODO: kill connection?
4604 return; // Drop message
4608 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
4614 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
4615 if (NULL == dst->core_transmit)
4617 struct GNUNET_PeerIdentity id;
4619 GNUNET_PEER_resolve (dst->id, &id);
4620 dst->core_transmit =
4621 GNUNET_CORE_notify_transmit_ready(core_handle,
4624 GNUNET_TIME_UNIT_FOREVER_REL,
4633 /******************************************************************************/
4634 /******************** MESH NETWORK HANDLERS **************************/
4635 /******************************************************************************/
4639 * Core handler for path creation
4641 * @param cls closure
4642 * @param message message
4643 * @param peer peer identity this notification is about
4644 * @param atsi performance data
4645 * @param atsi_count number of records in 'atsi'
4647 * @return GNUNET_OK to keep the connection open,
4648 * GNUNET_SYSERR to close it (signal serious error)
4651 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
4652 const struct GNUNET_MessageHeader *message,
4653 const struct GNUNET_ATS_Information *atsi,
4654 unsigned int atsi_count)
4656 unsigned int own_pos;
4659 MESH_TunnelNumber tid;
4660 struct GNUNET_MESH_ManipulatePath *msg;
4661 struct GNUNET_PeerIdentity *pi;
4662 struct GNUNET_HashCode hash;
4663 struct MeshPeerPath *path;
4664 struct MeshPeerInfo *dest_peer_info;
4665 struct MeshPeerInfo *orig_peer_info;
4666 struct MeshTunnel *t;
4668 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4669 "Received a path create msg [%s]\n",
4670 GNUNET_i2s (&my_full_id));
4671 size = ntohs (message->size);
4672 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4674 GNUNET_break_op (0);
4678 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4679 if (size % sizeof (struct GNUNET_PeerIdentity))
4681 GNUNET_break_op (0);
4684 size /= sizeof (struct GNUNET_PeerIdentity);
4687 GNUNET_break_op (0);
4690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4691 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4693 tid = ntohl (msg->tid);
4694 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4696 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
4697 t = tunnel_get (pi, tid);
4698 if (NULL == t) // FIXME only for INCOMING tunnels?
4702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
4703 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
4706 // FIXME notify failure
4709 opt = ntohl (msg->opt);
4710 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
4711 GNUNET_YES : GNUNET_NO;
4712 t->nobuffer = (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER)) ?
4713 GNUNET_YES : GNUNET_NO;
4715 if (GNUNET_YES == t->nobuffer)
4717 t->bck_queue_max = 1;
4718 t->fwd_queue_max = 1;
4721 // FIXME only assign a local tid if a local client is interested (on demand)
4722 while (NULL != tunnel_get_incoming (next_local_tid))
4723 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4724 t->local_tid_dest = next_local_tid++;
4725 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4728 tunnel_reset_timeout (t);
4729 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4731 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
4732 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
4740 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
4741 if (NULL == dest_peer_info)
4743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4744 " Creating PeerInfo for destination.\n");
4745 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4746 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
4747 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
4749 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4751 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
4752 if (NULL == orig_peer_info)
4754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4755 " Creating PeerInfo for origin.\n");
4756 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4757 orig_peer_info->id = GNUNET_PEER_intern (pi);
4758 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
4759 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4761 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4762 path = path_new (size);
4764 for (i = 0; i < size; i++)
4766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4767 GNUNET_i2s (&pi[i]));
4768 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4769 if (path->peers[i] == myid)
4772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4775 /* cannot be self, must be 'not found' */
4776 /* create path: self not found in path through self */
4777 GNUNET_break_op (0);
4778 path_destroy (path);
4782 path_add_to_peers (path, GNUNET_NO);
4783 tunnel_add_path (t, path, own_pos);
4784 if (own_pos == size - 1)
4786 /* It is for us! Send ack. */
4787 struct MeshTransmissionDescriptor *info;
4789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4790 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4791 if (NULL == t->peers)
4793 /* New tunnel! Notify clients on data. */
4794 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
4796 GNUNET_break (GNUNET_SYSERR !=
4797 GNUNET_CONTAINER_multihashmap_put (t->peers,
4798 &my_full_id.hashPubKey,
4801 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
4802 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
4803 info->origin = &t->id;
4804 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4805 GNUNET_assert (NULL != info->peer);
4807 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4808 sizeof (struct GNUNET_MESH_PathACK),
4814 struct MeshPeerPath *path2;
4816 /* It's for somebody else! Retransmit. */
4817 path2 = path_duplicate (path);
4818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4819 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4820 path2 = path_duplicate (path);
4821 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
4822 send_create_path (dest_peer_info, path, t);
4829 * Core handler for path destruction
4831 * @param cls closure
4832 * @param message message
4833 * @param peer peer identity this notification is about
4834 * @param atsi performance data
4835 * @param atsi_count number of records in 'atsi'
4837 * @return GNUNET_OK to keep the connection open,
4838 * GNUNET_SYSERR to close it (signal serious error)
4841 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4842 const struct GNUNET_MessageHeader *message,
4843 const struct GNUNET_ATS_Information *atsi,
4844 unsigned int atsi_count)
4846 struct GNUNET_MESH_ManipulatePath *msg;
4847 struct GNUNET_PeerIdentity *pi;
4848 struct MeshPeerPath *path;
4849 struct MeshTunnel *t;
4850 unsigned int own_pos;
4854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4855 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
4856 size = ntohs (message->size);
4857 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4859 GNUNET_break_op (0);
4863 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4864 if (size % sizeof (struct GNUNET_PeerIdentity))
4866 GNUNET_break_op (0);
4869 size /= sizeof (struct GNUNET_PeerIdentity);
4872 GNUNET_break_op (0);
4875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4877 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4878 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4880 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
4882 t = tunnel_get (pi, ntohl (msg->tid));
4885 /* TODO notify back: we don't know this tunnel */
4886 GNUNET_break_op (0);
4889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4890 path = path_new (size);
4892 for (i = 0; i < size; i++)
4894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4895 GNUNET_i2s (&pi[i]));
4896 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4897 if (path->peers[i] == myid)
4900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4901 if (own_pos < path->length - 1)
4902 send_message (message, &pi[own_pos + 1], t);
4904 send_client_tunnel_disconnect(t, NULL);
4906 tunnel_delete_peer (t, path->peers[path->length - 1]);
4907 path_destroy (path);
4913 * Core handler for notifications of broken paths
4915 * @param cls closure
4916 * @param message message
4917 * @param peer peer identity this notification is about
4918 * @param atsi performance data
4919 * @param atsi_count number of records in 'atsi'
4921 * @return GNUNET_OK to keep the connection open,
4922 * GNUNET_SYSERR to close it (signal serious error)
4925 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4926 const struct GNUNET_MessageHeader *message,
4927 const struct GNUNET_ATS_Information *atsi,
4928 unsigned int atsi_count)
4930 struct GNUNET_MESH_PathBroken *msg;
4931 struct MeshTunnel *t;
4933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4934 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4935 msg = (struct GNUNET_MESH_PathBroken *) message;
4936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4937 GNUNET_i2s (&msg->peer1));
4938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4939 GNUNET_i2s (&msg->peer2));
4940 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4943 GNUNET_break_op (0);
4946 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4947 GNUNET_PEER_search (&msg->peer2));
4954 * Core handler for tunnel destruction
4956 * @param cls closure
4957 * @param message message
4958 * @param peer peer identity this notification is about
4959 * @param atsi performance data
4960 * @param atsi_count number of records in 'atsi'
4962 * @return GNUNET_OK to keep the connection open,
4963 * GNUNET_SYSERR to close it (signal serious error)
4966 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4967 const struct GNUNET_MessageHeader *message,
4968 const struct GNUNET_ATS_Information *atsi,
4969 unsigned int atsi_count)
4971 struct GNUNET_MESH_TunnelDestroy *msg;
4972 struct MeshTunnel *t;
4974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4975 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
4976 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
4978 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4979 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4982 /* Probably already got the message from another path,
4983 * destroyed the tunnel and retransmitted to children.
4986 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4989 if (t->id.oid == myid)
4991 GNUNET_break_op (0);
4994 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4996 /* Tunnel was incoming, notify clients */
4997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4998 t->local_tid, t->local_tid_dest);
4999 send_clients_tunnel_destroy (t);
5001 tunnel_send_destroy (t);
5002 t->destroy = GNUNET_YES;
5003 // TODO: add timeout to destroy the tunnel anyway
5009 * Core handler for mesh network traffic going from the origin to a peer
5011 * @param cls closure
5012 * @param peer peer identity this notification is about
5013 * @param message message
5014 * @param atsi performance data
5015 * @param atsi_count number of records in 'atsi'
5016 * @return GNUNET_OK to keep the connection open,
5017 * GNUNET_SYSERR to close it (signal serious error)
5020 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5021 const struct GNUNET_MessageHeader *message,
5022 const struct GNUNET_ATS_Information *atsi,
5023 unsigned int atsi_count)
5025 struct GNUNET_MESH_Unicast *msg;
5026 struct GNUNET_PeerIdentity *neighbor;
5027 struct MeshTunnelChildInfo *cinfo;
5028 struct MeshTunnel *t;
5029 GNUNET_PEER_Id dest_id;
5034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
5037 size = ntohs (message->size);
5039 sizeof (struct GNUNET_MESH_Unicast) +
5040 sizeof (struct GNUNET_MessageHeader))
5045 msg = (struct GNUNET_MESH_Unicast *) message;
5046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5047 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5049 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5052 /* TODO notify back: we don't know this tunnel */
5053 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5054 GNUNET_break_op (0);
5057 pid = ntohl (msg->pid);
5058 if (t->fwd_pid == pid)
5060 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5061 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5062 " Already seen pid %u, DROPPING!\n", pid);
5067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5068 " pid %u not seen yet, forwarding\n", pid);
5070 t->skip += (pid - t->fwd_pid) - 1;
5072 if (is_pid_bigger (pid, t->last_fwd_ack))
5074 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5075 GNUNET_break_op (0);
5078 tunnel_reset_timeout (t);
5079 dest_id = GNUNET_PEER_search (&msg->destination);
5080 if (dest_id == myid)
5082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5083 " it's for us! sending to clients...\n");
5084 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
5085 send_subscribed_clients (message, (struct GNUNET_MessageHeader *) &msg[1]);
5086 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5089 ttl = ntohl (msg->ttl);
5090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5093 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5094 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5095 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5099 " not for us, retransmitting...\n");
5101 neighbor = tree_get_first_hop (t->tree, dest_id);
5102 cinfo = tunnel_get_neighbor_fc (t, neighbor);
5104 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
5107 if (is_pid_bigger (pid, cinfo->fwd_ack))
5109 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5110 GNUNET_break_op (0);
5113 send_message (message, neighbor, t);
5114 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
5121 * Core handler for mesh network traffic going from the origin to all peers
5123 * @param cls closure
5124 * @param message message
5125 * @param peer peer identity this notification is about
5126 * @param atsi performance data
5127 * @param atsi_count number of records in 'atsi'
5128 * @return GNUNET_OK to keep the connection open,
5129 * GNUNET_SYSERR to close it (signal serious error)
5131 * TODO: Check who we got this from, to validate route.
5134 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5135 const struct GNUNET_MessageHeader *message,
5136 const struct GNUNET_ATS_Information *atsi,
5137 unsigned int atsi_count)
5139 struct GNUNET_MESH_Multicast *msg;
5140 struct MeshTunnel *t;
5144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
5146 size = ntohs (message->size);
5147 if (sizeof (struct GNUNET_MESH_Multicast) +
5148 sizeof (struct GNUNET_MessageHeader) > size)
5150 GNUNET_break_op (0);
5153 msg = (struct GNUNET_MESH_Multicast *) message;
5154 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5158 /* TODO notify that we dont know that tunnel */
5159 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5160 GNUNET_break_op (0);
5163 pid = ntohl (msg->pid);
5164 if (t->fwd_pid == pid)
5166 /* already seen this packet, drop */
5167 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5169 " Already seen pid %u, DROPPING!\n", pid);
5170 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5176 " pid %u not seen yet, forwarding\n", pid);
5178 t->skip += (pid - t->fwd_pid) - 1;
5180 tunnel_reset_timeout (t);
5182 /* Transmit to locally interested clients */
5183 if (NULL != t->peers &&
5184 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
5186 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
5187 send_subscribed_clients (message, &msg[1].header);
5188 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
5191 if (ntohl (msg->ttl) == 0)
5193 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5194 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5195 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5198 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
5199 tunnel_send_multicast (t, message, GNUNET_NO);
5205 * Core handler for mesh network traffic toward the owner of a tunnel
5207 * @param cls closure
5208 * @param message message
5209 * @param peer peer identity this notification is about
5210 * @param atsi performance data
5211 * @param atsi_count number of records in 'atsi'
5213 * @return GNUNET_OK to keep the connection open,
5214 * GNUNET_SYSERR to close it (signal serious error)
5217 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
5218 const struct GNUNET_MessageHeader *message,
5219 const struct GNUNET_ATS_Information *atsi,
5220 unsigned int atsi_count)
5222 struct GNUNET_MESH_ToOrigin *msg;
5223 struct GNUNET_PeerIdentity id;
5224 struct MeshPeerInfo *peer_info;
5225 struct MeshTunnel *t;
5228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
5230 size = ntohs (message->size);
5231 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
5232 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
5234 GNUNET_break_op (0);
5237 msg = (struct GNUNET_MESH_ToOrigin *) message;
5238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5239 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5240 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5244 /* TODO notify that we dont know this tunnel (whom)? */
5245 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5246 GNUNET_break_op (0);
5250 if (NULL != t->owner)
5253 struct GNUNET_MESH_ToOrigin *copy;
5255 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5256 " it's for us! sending to clients...\n");
5257 /* TODO signature verification */
5258 memcpy (cbuf, message, size);
5259 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
5260 copy->tid = htonl (t->local_tid);
5261 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
5262 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
5263 ©->header, GNUNET_NO);
5264 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5268 " not for us, retransmitting...\n");
5270 peer_info = peer_info_get (&msg->oid);
5271 if (NULL == peer_info)
5273 /* unknown origin of tunnel */
5277 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5278 send_message (message, &id, t);
5279 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
5286 * Core handler for mesh network traffic point-to-point acks.
5288 * @param cls closure
5289 * @param message message
5290 * @param peer peer identity this notification is about
5291 * @param atsi performance data
5292 * @param atsi_count number of records in 'atsi'
5294 * @return GNUNET_OK to keep the connection open,
5295 * GNUNET_SYSERR to close it (signal serious error)
5298 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5299 const struct GNUNET_MessageHeader *message,
5300 const struct GNUNET_ATS_Information *atsi,
5301 unsigned int atsi_count)
5303 struct GNUNET_MESH_ACK *msg;
5304 struct MeshTunnel *t;
5307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
5309 msg = (struct GNUNET_MESH_ACK *) message;
5310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5311 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5312 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5316 /* TODO notify that we dont know this tunnel (whom)? */
5317 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
5318 GNUNET_break_op (0);
5321 ack = ntohl (msg->pid);
5323 /* Is this a forward or backward ACK? */
5324 if (tree_get_predecessor(t->tree) == GNUNET_PEER_search(peer))
5326 struct MeshTunnelChildInfo *cinfo;
5328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
5329 cinfo = tunnel_get_neighbor_fc (t, peer);
5330 cinfo->fwd_ack = ack;
5331 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
5337 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5339 // FIXME fc Unlock queues?
5345 * Core handler for path ACKs
5347 * @param cls closure
5348 * @param message message
5349 * @param peer peer identity this notification is about
5350 * @param atsi performance data
5351 * @param atsi_count number of records in 'atsi'
5353 * @return GNUNET_OK to keep the connection open,
5354 * GNUNET_SYSERR to close it (signal serious error)
5357 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5358 const struct GNUNET_MessageHeader *message,
5359 const struct GNUNET_ATS_Information *atsi,
5360 unsigned int atsi_count)
5362 struct GNUNET_MESH_PathACK *msg;
5363 struct GNUNET_PeerIdentity id;
5364 struct MeshPeerInfo *peer_info;
5365 struct MeshPeerPath *p;
5366 struct MeshTunnel *t;
5368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
5369 GNUNET_i2s (&my_full_id));
5370 msg = (struct GNUNET_MESH_PathACK *) message;
5371 t = tunnel_get (&msg->oid, ntohl(msg->tid));
5374 /* TODO notify that we don't know the tunnel */
5375 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
5377 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
5381 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5383 peer_info = peer_info_get (&msg->peer_id);
5384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
5385 GNUNET_i2s (&msg->peer_id));
5386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
5389 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
5391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5392 "connect_by_string completed, stopping search\n");
5393 regex_cancel_search (t->regex_ctx);
5394 t->regex_ctx = NULL;
5397 /* Add paths to peers? */
5398 p = tree_get_path_to_peer (t->tree, peer_info->id);
5401 path_add_to_peers (p, GNUNET_YES);
5409 /* Message for us? */
5410 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
5412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5413 if (NULL == t->owner)
5415 GNUNET_break_op (0);
5418 if (NULL != t->dht_get_type)
5420 GNUNET_DHT_get_stop (t->dht_get_type);
5421 t->dht_get_type = NULL;
5423 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
5425 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
5426 send_client_peer_connected (t, peer_info->id);
5431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5432 " not for us, retransmitting...\n");
5433 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5434 peer_info = peer_info_get (&msg->oid);
5435 if (NULL == peer_info)
5437 /* If we know the tunnel, we should DEFINITELY know the peer */
5441 send_message (message, &id, t);
5447 * Functions to handle messages from core
5449 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
5450 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
5451 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
5452 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
5453 sizeof (struct GNUNET_MESH_PathBroken)},
5454 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
5455 sizeof (struct GNUNET_MESH_TunnelDestroy)},
5456 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
5457 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
5458 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
5459 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
5460 sizeof (struct GNUNET_MESH_ACK)},
5461 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
5462 sizeof (struct GNUNET_MESH_PathACK)},
5468 /******************************************************************************/
5469 /**************** MESH LOCAL HANDLER HELPERS ***********************/
5470 /******************************************************************************/
5473 * deregister_app: iterator for removing each application registered by a client
5475 * @param cls closure
5476 * @param key the hash of the application id (used to access the hashmap)
5477 * @param value the value stored at the key (client)
5479 * @return GNUNET_OK on success
5482 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
5484 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
5485 GNUNET_break (GNUNET_YES ==
5486 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
5492 * notify_client_connection_failure: notify a client that the connection to the
5493 * requested remote peer is not possible (for instance, no route found)
5494 * Function called when the socket is ready to queue more data. "buf" will be
5495 * NULL and "size" zero if the socket was closed for writing in the meantime.
5497 * @param cls closure
5498 * @param size number of bytes available in buf
5499 * @param buf where the callee should write the message
5500 * @return number of bytes written to buf
5503 notify_client_connection_failure (void *cls, size_t size, void *buf)
5506 struct MeshPeerInfo *peer_info;
5507 struct GNUNET_MESH_PeerControl *msg;
5508 struct GNUNET_PeerIdentity id;
5510 if (0 == size && NULL == buf)
5512 // TODO retry? cancel?
5516 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
5517 peer_info = (struct MeshPeerInfo *) cls;
5518 msg = (struct GNUNET_MESH_PeerControl *) buf;
5519 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
5520 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
5521 // msg->tunnel_id = htonl(peer_info->t->tid);
5522 GNUNET_PEER_resolve (peer_info->id, &id);
5523 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
5531 * Send keepalive packets for a peer
5533 * @param cls Closure (tunnel for which to send the keepalive).
5534 * @param tc Notification context.
5536 * TODO: implement explicit multicast keepalive?
5539 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5541 struct MeshTunnel *t = cls;
5542 struct GNUNET_MessageHeader *payload;
5543 struct GNUNET_MESH_Multicast *msg;
5545 sizeof (struct GNUNET_MESH_Multicast) +
5546 sizeof (struct GNUNET_MessageHeader);
5549 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
5553 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
5555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5556 "sending keepalive for tunnel %d\n", t->id.tid);
5558 msg = (struct GNUNET_MESH_Multicast *) cbuf;
5559 msg->header.size = htons (size);
5560 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5561 msg->oid = my_full_id;
5562 msg->tid = htonl (t->id.tid);
5563 msg->ttl = htonl (default_ttl);
5564 msg->pid = htonl (t->fwd_pid + 1);
5566 payload = (struct GNUNET_MessageHeader *) &msg[1];
5567 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
5568 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
5569 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
5571 t->path_refresh_task =
5572 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
5578 * Function to process paths received for a new peer addition. The recorded
5579 * paths form the initial tunnel, which can be optimized later.
5580 * Called on each result obtained for the DHT search.
5582 * @param cls closure
5583 * @param exp when will this value expire
5584 * @param key key of the result
5585 * @param get_path path of the get request
5586 * @param get_path_length lenght of get_path
5587 * @param put_path path of the put request
5588 * @param put_path_length length of the put_path
5589 * @param type type of the result
5590 * @param size number of bytes in data
5591 * @param data pointer to the result data
5593 * TODO: re-issue the request after certain time? cancel after X results?
5596 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5597 const struct GNUNET_HashCode * key,
5598 const struct GNUNET_PeerIdentity *get_path,
5599 unsigned int get_path_length,
5600 const struct GNUNET_PeerIdentity *put_path,
5601 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5602 size_t size, const void *data)
5604 struct MeshPathInfo *path_info = cls;
5605 struct MeshPeerPath *p;
5606 struct GNUNET_PeerIdentity pi;
5609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
5610 GNUNET_PEER_resolve (path_info->peer->id, &pi);
5611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
5613 p = path_build_from_dht (get_path, get_path_length, put_path,
5615 path_add_to_peers (p, GNUNET_NO);
5617 for (i = 0; i < path_info->peer->ntunnels; i++)
5619 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
5620 peer_info_connect (path_info->peer, path_info->t);
5628 * Function to process paths received for a new peer addition. The recorded
5629 * paths form the initial tunnel, which can be optimized later.
5630 * Called on each result obtained for the DHT search.
5632 * @param cls closure
5633 * @param exp when will this value expire
5634 * @param key key of the result
5635 * @param get_path path of the get request
5636 * @param get_path_length lenght of get_path
5637 * @param put_path path of the put request
5638 * @param put_path_length length of the put_path
5639 * @param type type of the result
5640 * @param size number of bytes in data
5641 * @param data pointer to the result data
5644 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5645 const struct GNUNET_HashCode * key,
5646 const struct GNUNET_PeerIdentity *get_path,
5647 unsigned int get_path_length,
5648 const struct GNUNET_PeerIdentity *put_path,
5649 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5650 size_t size, const void *data)
5652 const struct PBlock *pb = data;
5653 const struct GNUNET_PeerIdentity *pi = &pb->id;
5654 struct MeshTunnel *t = cls;
5655 struct MeshPeerInfo *peer_info;
5656 struct MeshPeerPath *p;
5658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
5659 if (size != sizeof (struct PBlock))
5661 GNUNET_break_op (0);
5664 if (ntohl(pb->type) != t->type)
5666 GNUNET_break_op (0);
5669 GNUNET_assert (NULL != t->owner);
5670 peer_info = peer_info_get (pi);
5671 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
5673 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
5675 p = path_build_from_dht (get_path, get_path_length, put_path,
5677 path_add_to_peers (p, GNUNET_NO);
5679 tunnel_add_peer (t, peer_info);
5680 peer_info_connect (peer_info, t);
5685 * Function to process DHT string to regex matching.
5686 * Called on each result obtained for the DHT search.
5688 * @param cls closure (search context)
5689 * @param exp when will this value expire
5690 * @param key key of the result
5691 * @param get_path path of the get request (not used)
5692 * @param get_path_length lenght of get_path (not used)
5693 * @param put_path path of the put request (not used)
5694 * @param put_path_length length of the put_path (not used)
5695 * @param type type of the result
5696 * @param size number of bytes in data
5697 * @param data pointer to the result data
5700 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5701 const struct GNUNET_HashCode * key,
5702 const struct GNUNET_PeerIdentity *get_path,
5703 unsigned int get_path_length,
5704 const struct GNUNET_PeerIdentity *put_path,
5705 unsigned int put_path_length,
5706 enum GNUNET_BLOCK_Type type,
5707 size_t size, const void *data)
5709 const struct MeshRegexAccept *block = data;
5710 struct MeshRegexSearchContext *ctx = cls;
5711 struct MeshRegexSearchInfo *info = ctx->info;
5712 struct MeshPeerPath *p;
5713 struct MeshPeerInfo *peer_info;
5715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
5716 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
5718 peer_info = peer_info_get(&block->id);
5719 p = path_build_from_dht (get_path, get_path_length, put_path,
5721 path_add_to_peers (p, GNUNET_NO);
5724 tunnel_add_peer (info->t, peer_info);
5725 peer_info_connect (peer_info, info->t);
5726 if (0 == info->peer)
5728 info->peer = peer_info->id;
5732 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
5735 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
5736 ®ex_connect_timeout,
5744 * Function to process DHT string to regex matching.
5745 * Called on each result obtained for the DHT search.
5747 * @param cls closure (search context)
5748 * @param exp when will this value expire
5749 * @param key key of the result
5750 * @param get_path path of the get request (not used)
5751 * @param get_path_length lenght of get_path (not used)
5752 * @param put_path path of the put request (not used)
5753 * @param put_path_length length of the put_path (not used)
5754 * @param type type of the result
5755 * @param size number of bytes in data
5756 * @param data pointer to the result data
5758 * TODO: re-issue the request after certain time? cancel after X results?
5761 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5762 const struct GNUNET_HashCode * key,
5763 const struct GNUNET_PeerIdentity *get_path,
5764 unsigned int get_path_length,
5765 const struct GNUNET_PeerIdentity *put_path,
5766 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5767 size_t size, const void *data)
5769 const struct MeshRegexBlock *block = data;
5770 struct MeshRegexSearchContext *ctx = cls;
5771 struct MeshRegexSearchInfo *info = ctx->info;
5775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5776 "DHT GET STRING RETURNED RESULTS\n");
5777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5778 " key: %s\n", GNUNET_h2s (key));
5780 copy = GNUNET_malloc (size);
5781 memcpy (copy, data, size);
5782 GNUNET_break (GNUNET_OK ==
5783 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
5784 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
5785 len = ntohl (block->n_proof);
5787 char proof[len + 1];
5789 memcpy (proof, &block[1], len);
5791 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
5793 GNUNET_break_op (0);
5797 len = strlen (info->description);
5798 if (len == ctx->position) // String processed
5800 if (GNUNET_YES == ntohl (block->accepting))
5802 regex_find_path(key, ctx);
5806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
5807 // FIXME REGEX this block not successful, wait for more? start timeout?
5811 GNUNET_break (GNUNET_OK ==
5812 GNUNET_MESH_regex_block_iterate (block, size,
5813 ®ex_edge_iterator, ctx));
5817 /******************************************************************************/
5818 /********************* MESH LOCAL HANDLES **************************/
5819 /******************************************************************************/
5823 * Handler for client disconnection
5825 * @param cls closure
5826 * @param client identification of the client; NULL
5827 * for the last call when the server is destroyed
5830 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
5832 struct MeshClient *c;
5833 struct MeshClient *next;
5836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
5839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
5845 if (c->handle != client)
5847 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
5851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
5853 GNUNET_SERVER_client_drop (c->handle);
5854 c->shutting_down = GNUNET_YES;
5855 GNUNET_assert (NULL != c->own_tunnels);
5856 GNUNET_assert (NULL != c->incoming_tunnels);
5857 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
5858 &tunnel_destroy_iterator, c);
5859 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
5860 &tunnel_destroy_iterator, c);
5861 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
5862 &tunnel_destroy_iterator, c);
5863 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
5864 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
5865 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
5867 /* deregister clients applications */
5868 if (NULL != c->apps)
5870 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
5871 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
5873 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
5874 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
5876 GNUNET_SCHEDULER_cancel (announce_applications_task);
5877 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
5879 if (NULL != c->types)
5880 GNUNET_CONTAINER_multihashmap_destroy (c->types);
5881 for (i = 0; i < c->n_regex; i++)
5883 GNUNET_free (c->regexes[i]);
5885 GNUNET_free_non_null (c->regexes);
5886 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
5887 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
5889 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
5890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
5892 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
5895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
5901 * Handler for new clients
5903 * @param cls closure
5904 * @param client identification of the client
5905 * @param message the actual message, which includes messages the client wants
5908 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
5909 const struct GNUNET_MessageHeader *message)
5911 struct GNUNET_MESH_ClientConnect *cc_msg;
5912 struct MeshClient *c;
5913 GNUNET_MESH_ApplicationType *a;
5920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
5921 /* Check data sanity */
5922 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
5923 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
5924 ntypes = ntohs (cc_msg->types);
5925 napps = ntohs (cc_msg->applications);
5927 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
5930 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5934 /* Create new client structure */
5935 c = GNUNET_malloc (sizeof (struct MeshClient));
5936 c->id = next_client_id++;
5937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
5939 GNUNET_SERVER_client_keep (client);
5940 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
5943 GNUNET_MESH_ApplicationType at;
5944 struct GNUNET_HashCode hc;
5946 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
5947 for (i = 0; i < napps; i++)
5950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
5951 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
5952 /* store in clients hashmap */
5953 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
5954 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5955 /* store in global hashmap, for announcements */
5956 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
5957 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5959 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
5960 announce_applications_task =
5961 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
5967 struct GNUNET_HashCode hc;
5969 t = (uint16_t *) & a[napps];
5970 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
5971 for (i = 0; i < ntypes; i++)
5974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
5975 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
5977 /* store in clients hashmap */
5978 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
5979 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5980 /* store in global hashmap */
5981 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
5982 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5986 " client has %u+%u subscriptions\n", napps, ntypes);
5988 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
5989 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5990 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5991 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5992 GNUNET_SERVER_notification_context_add (nc, client);
5993 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
5995 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
6001 * Handler for clients announcing available services by a regular expression.
6003 * @param cls closure
6004 * @param client identification of the client
6005 * @param message the actual message, which includes messages the client wants
6008 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
6009 const struct GNUNET_MessageHeader *message)
6011 struct MeshClient *c;
6015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
6017 /* Sanity check for client registration */
6018 if (NULL == (c = client_get (client)))
6021 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6026 len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
6027 regex = GNUNET_malloc (len + 1);
6028 memcpy (regex, &message[1], len);
6030 GNUNET_array_append (c->regexes, c->n_regex, regex);
6031 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
6033 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
6039 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
6045 * Handler for requests of new tunnels
6047 * @param cls closure
6048 * @param client identification of the client
6049 * @param message the actual message
6052 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
6053 const struct GNUNET_MessageHeader *message)
6055 struct GNUNET_MESH_TunnelMessage *t_msg;
6056 struct MeshTunnel *t;
6057 struct MeshClient *c;
6058 MESH_TunnelNumber tid;
6060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
6062 /* Sanity check for client registration */
6063 if (NULL == (c = client_get (client)))
6066 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6069 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6071 /* Message sanity check */
6072 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6075 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6079 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6080 /* Sanity check for tunnel numbering */
6081 tid = ntohl (t_msg->tunnel_id);
6082 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
6085 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6088 /* Sanity check for duplicate tunnel IDs */
6089 if (NULL != tunnel_get_by_local_id (c, tid))
6092 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6096 while (NULL != tunnel_get_by_pi (myid, next_tid))
6097 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6098 t = tunnel_new (myid, next_tid++, c, tid);
6101 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
6103 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6106 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
6108 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
6109 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
6111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
6112 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6118 * Handler for requests of deleting tunnels
6120 * @param cls closure
6121 * @param client identification of the client
6122 * @param message the actual message
6125 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
6126 const struct GNUNET_MessageHeader *message)
6128 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6129 struct MeshClient *c;
6130 struct MeshTunnel *t;
6131 MESH_TunnelNumber tid;
6133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6134 "Got a DESTROY TUNNEL from client!\n");
6136 /* Sanity check for client registration */
6137 if (NULL == (c = client_get (client)))
6140 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6143 /* Message sanity check */
6144 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6147 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6150 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6151 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6153 /* Retrieve tunnel */
6154 tid = ntohl (tunnel_msg->tunnel_id);
6155 t = tunnel_get_by_local_id(c, tid);
6158 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6160 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6163 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6165 client_ignore_tunnel (c, t);
6167 // TODO: when to destroy incoming tunnel?
6168 if (t->nclients == 0)
6170 GNUNET_assert (GNUNET_YES ==
6171 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
6173 GNUNET_assert (GNUNET_YES ==
6174 GNUNET_CONTAINER_multihashmap_remove (t->peers,
6175 &my_full_id.hashPubKey,
6179 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6182 send_client_tunnel_disconnect(t, c);
6183 client_delete_tunnel(c, t);
6185 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
6187 tunnel_send_destroy (t);
6188 t->destroy = GNUNET_YES;
6189 // The tunnel will be destroyed when the last message is transmitted.
6190 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6196 * Handler for requests of seeting tunnel's speed.
6198 * @param cls Closure (unused).
6199 * @param client Identification of the client.
6200 * @param message The actual message.
6203 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
6204 const struct GNUNET_MessageHeader *message)
6206 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6207 struct MeshClient *c;
6208 struct MeshTunnel *t;
6209 MESH_TunnelNumber tid;
6211 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6212 "Got a SPEED request from client!\n");
6214 /* Sanity check for client registration */
6215 if (NULL == (c = client_get (client)))
6218 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6223 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6225 /* Retrieve tunnel */
6226 tid = ntohl (tunnel_msg->tunnel_id);
6227 t = tunnel_get_by_local_id(c, tid);
6230 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
6232 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6236 switch (ntohs(message->type))
6238 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
6239 t->speed_min = GNUNET_YES;
6241 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
6242 t->speed_min = GNUNET_NO;
6247 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6252 * Handler for requests of seeting tunnel's buffering policy.
6254 * @param cls Closure (unused).
6255 * @param client Identification of the client.
6256 * @param message The actual message.
6259 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
6260 const struct GNUNET_MessageHeader *message)
6262 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6263 struct MeshClient *c;
6264 struct MeshTunnel *t;
6265 MESH_TunnelNumber tid;
6267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6268 "Got a BUFFER request from client!\n");
6270 /* Sanity check for client registration */
6271 if (NULL == (c = client_get (client)))
6274 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6279 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6281 /* Retrieve tunnel */
6282 tid = ntohl (tunnel_msg->tunnel_id);
6283 t = tunnel_get_by_local_id(c, tid);
6286 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6288 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6292 switch (ntohs(message->type))
6294 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
6295 t->nobuffer = GNUNET_NO;
6297 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
6298 t->nobuffer = GNUNET_YES;
6304 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6309 * Handler for connection requests to new peers
6311 * @param cls closure
6312 * @param client identification of the client
6313 * @param message the actual message (PeerControl)
6316 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
6317 const struct GNUNET_MessageHeader *message)
6319 struct GNUNET_MESH_PeerControl *peer_msg;
6320 struct MeshPeerInfo *peer_info;
6321 struct MeshClient *c;
6322 struct MeshTunnel *t;
6323 MESH_TunnelNumber tid;
6325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
6326 /* Sanity check for client registration */
6327 if (NULL == (c = client_get (client)))
6330 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6334 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6335 /* Sanity check for message size */
6336 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6339 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6343 /* Tunnel exists? */
6344 tid = ntohl (peer_msg->tunnel_id);
6345 t = tunnel_get_by_local_id (c, tid);
6349 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6353 /* Does client own tunnel? */
6354 if (t->owner->handle != client)
6357 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
6361 GNUNET_i2s (&peer_msg->peer));
6362 peer_info = peer_info_get (&peer_msg->peer);
6364 tunnel_add_peer (t, peer_info);
6365 peer_info_connect (peer_info, t);
6367 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6373 * Handler for disconnection requests of peers in a tunnel
6375 * @param cls closure
6376 * @param client identification of the client
6377 * @param message the actual message (PeerControl)
6380 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
6381 const struct GNUNET_MessageHeader *message)
6383 struct GNUNET_MESH_PeerControl *peer_msg;
6384 struct MeshPeerInfo *peer_info;
6385 struct MeshClient *c;
6386 struct MeshTunnel *t;
6387 MESH_TunnelNumber tid;
6389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
6390 /* Sanity check for client registration */
6391 if (NULL == (c = client_get (client)))
6394 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6397 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6398 /* Sanity check for message size */
6399 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6402 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6406 /* Tunnel exists? */
6407 tid = ntohl (peer_msg->tunnel_id);
6408 t = tunnel_get_by_local_id (c, tid);
6412 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6417 /* Does client own tunnel? */
6418 if (t->owner->handle != client)
6421 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
6426 GNUNET_i2s (&peer_msg->peer));
6427 /* Is the peer in the tunnel? */
6429 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
6430 if (NULL == peer_info)
6433 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6437 /* Ok, delete peer from tunnel */
6438 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
6439 &peer_msg->peer.hashPubKey);
6441 send_destroy_path (t, peer_info->id);
6442 tunnel_delete_peer (t, peer_info->id);
6443 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6448 * Handler for blacklist requests of peers in a tunnel
6450 * @param cls closure
6451 * @param client identification of the client
6452 * @param message the actual message (PeerControl)
6455 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
6456 const struct GNUNET_MessageHeader *message)
6458 struct GNUNET_MESH_PeerControl *peer_msg;
6459 struct MeshClient *c;
6460 struct MeshTunnel *t;
6461 MESH_TunnelNumber tid;
6463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
6464 /* Sanity check for client registration */
6465 if (NULL == (c = client_get (client)))
6468 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6471 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6473 /* Sanity check for message size */
6474 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6477 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6481 /* Tunnel exists? */
6482 tid = ntohl (peer_msg->tunnel_id);
6483 t = tunnel_get_by_local_id (c, tid);
6487 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6492 GNUNET_array_append(t->blacklisted, t->nblacklisted,
6493 GNUNET_PEER_intern(&peer_msg->peer));
6498 * Handler for unblacklist requests of peers in a tunnel
6500 * @param cls closure
6501 * @param client identification of the client
6502 * @param message the actual message (PeerControl)
6505 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
6506 const struct GNUNET_MessageHeader *message)
6508 struct GNUNET_MESH_PeerControl *peer_msg;
6509 struct MeshClient *c;
6510 struct MeshTunnel *t;
6511 MESH_TunnelNumber tid;
6515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
6516 /* Sanity check for client registration */
6517 if (NULL == (c = client_get (client)))
6520 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6523 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6525 /* Sanity check for message size */
6526 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6529 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6533 /* Tunnel exists? */
6534 tid = ntohl (peer_msg->tunnel_id);
6535 t = tunnel_get_by_local_id (c, tid);
6539 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6544 /* if peer is not known, complain */
6545 pid = GNUNET_PEER_search (&peer_msg->peer);
6552 /* search and remove from list */
6553 for (i = 0; i < t->nblacklisted; i++)
6555 if (t->blacklisted[i] == pid)
6557 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
6558 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
6563 /* if peer hasn't been blacklisted, complain */
6569 * Handler for connection requests to new peers by type
6571 * @param cls closure
6572 * @param client identification of the client
6573 * @param message the actual message (ConnectPeerByType)
6576 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
6577 const struct GNUNET_MessageHeader *message)
6579 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
6580 struct MeshClient *c;
6581 struct MeshTunnel *t;
6582 struct GNUNET_HashCode hash;
6583 MESH_TunnelNumber tid;
6585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
6586 /* Sanity check for client registration */
6587 if (NULL == (c = client_get (client)))
6590 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6594 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
6595 /* Sanity check for message size */
6596 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
6597 ntohs (connect_msg->header.size))
6600 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6604 /* Tunnel exists? */
6605 tid = ntohl (connect_msg->tunnel_id);
6606 t = tunnel_get_by_local_id (c, tid);
6610 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6614 /* Does client own tunnel? */
6615 if (t->owner->handle != client)
6618 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6622 /* Do WE have the service? */
6623 t->type = ntohl (connect_msg->type);
6624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
6625 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
6626 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
6629 /* Yes! Fast forward, add ourselves to the tunnel and send the
6630 * good news to the client, and alert the destination client of
6631 * an incoming tunnel.
6633 * FIXME send a path create to self, avoid code duplication
6635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
6636 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
6637 peer_info_get (&my_full_id),
6638 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
6641 send_client_peer_connected (t, myid);
6642 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
6643 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6645 t->local_tid_dest = next_local_tid++;
6646 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
6647 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
6648 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6652 /* Ok, lets find a peer offering the service */
6653 if (NULL != t->dht_get_type)
6655 GNUNET_DHT_get_stop (t->dht_get_type);
6657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
6658 GNUNET_h2s (&hash));
6660 GNUNET_DHT_get_start (dht_handle,
6661 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
6663 dht_replication_level,
6664 GNUNET_DHT_RO_RECORD_ROUTE |
6665 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6667 &dht_get_type_handler, t);
6669 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6675 * Handler for connection requests to new peers by a string service description.
6677 * @param cls closure
6678 * @param client identification of the client
6679 * @param message the actual message, which includes messages the client wants
6682 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
6683 const struct GNUNET_MessageHeader *message)
6685 struct GNUNET_MESH_ConnectPeerByString *msg;
6686 struct MeshRegexSearchContext *ctx;
6687 struct MeshRegexSearchInfo *info;
6688 struct GNUNET_DHT_GetHandle *get_h;
6689 struct GNUNET_HashCode key;
6690 struct MeshTunnel *t;
6691 struct MeshClient *c;
6692 MESH_TunnelNumber tid;
6696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6697 "Connect by string started\n");
6698 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
6699 size = htons (message->size);
6701 /* Sanity check for client registration */
6702 if (NULL == (c = client_get (client)))
6705 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6709 /* Message size sanity check */
6710 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
6713 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6717 /* Tunnel exists? */
6718 tid = ntohl (msg->tunnel_id);
6719 t = tunnel_get_by_local_id (c, tid);
6723 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6727 /* Does client own tunnel? */
6728 if (t->owner->handle != client)
6731 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6736 " on tunnel %s [%u]\n",
6737 GNUNET_i2s(&my_full_id),
6740 /* Only one connect_by_string allowed at the same time! */
6741 /* FIXME: allow more, return handle at api level to cancel, document */
6742 if (NULL != t->regex_ctx)
6745 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6749 /* Find string itself */
6750 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
6751 string = (const char *) &msg[1];
6753 /* Initialize context */
6754 size = GNUNET_REGEX_get_first_key(string, len, &key);
6755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6756 " consumed %u bits out of %u\n", size, len);
6757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6758 " looking for %s\n", GNUNET_h2s (&key));
6760 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
6762 info->description = GNUNET_malloc (len + 1);
6763 memcpy (info->description, string, len);
6764 info->description[len] = '\0';
6765 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32);
6766 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32);
6767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
6769 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
6770 ctx->position = size;
6774 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
6776 /* Start search in DHT */
6777 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
6778 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
6779 &key, /* key to search */
6780 dht_replication_level, /* replication level */
6781 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6782 NULL, /* xquery */ // FIXME BLOOMFILTER
6783 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
6784 &dht_get_string_handler, ctx);
6786 GNUNET_break (GNUNET_OK ==
6787 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
6790 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
6792 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6793 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
6798 * Handler for client traffic directed to one peer
6800 * @param cls closure
6801 * @param client identification of the client
6802 * @param message the actual message
6805 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
6806 const struct GNUNET_MessageHeader *message)
6808 struct MeshClient *c;
6809 struct MeshTunnel *t;
6810 struct MeshPeerInfo *pi;
6811 struct GNUNET_MESH_Unicast *data_msg;
6812 MESH_TunnelNumber tid;
6815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6816 "Got a unicast request from a client!\n");
6818 /* Sanity check for client registration */
6819 if (NULL == (c = client_get (client)))
6822 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6825 data_msg = (struct GNUNET_MESH_Unicast *) message;
6826 /* Sanity check for message size */
6827 size = ntohs (message->size);
6828 if (sizeof (struct GNUNET_MESH_Unicast) +
6829 sizeof (struct GNUNET_MessageHeader) > size)
6832 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6836 /* Tunnel exists? */
6837 tid = ntohl (data_msg->tid);
6838 t = tunnel_get_by_local_id (c, tid);
6842 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6846 /* Is it a local tunnel? Then, does client own the tunnel? */
6847 if (t->owner->handle != client)
6850 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6854 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
6855 &data_msg->destination.hashPubKey);
6856 /* Is the selected peer in the tunnel? */
6860 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6864 /* PID should be as expected */
6865 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
6868 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6869 "Unicast PID, expected %u, got %u\n",
6870 t->fwd_pid + 1, ntohl (data_msg->pid));
6871 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6875 /* Ok, everything is correct, send the message
6876 * (pretend we got it from a mesh peer)
6879 /* Work around const limitation */
6880 char buf[ntohs (message->size)] GNUNET_ALIGN;
6881 struct GNUNET_MESH_Unicast *copy;
6883 copy = (struct GNUNET_MESH_Unicast *) buf;
6884 memcpy (buf, data_msg, size);
6885 copy->oid = my_full_id;
6886 copy->tid = htonl (t->id.tid);
6887 copy->ttl = htonl (default_ttl);
6888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6889 " calling generic handler...\n");
6890 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
6892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
6893 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6899 * Handler for client traffic directed to the origin
6901 * @param cls closure
6902 * @param client identification of the client
6903 * @param message the actual message
6906 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
6907 const struct GNUNET_MessageHeader *message)
6909 struct GNUNET_MESH_ToOrigin *data_msg;
6910 struct MeshTunnelClientInfo *clinfo;
6911 struct MeshClient *c;
6912 struct MeshTunnel *t;
6913 MESH_TunnelNumber tid;
6916 /* Sanity check for client registration */
6917 if (NULL == (c = client_get (client)))
6920 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6923 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
6924 /* Sanity check for message size */
6925 size = ntohs (message->size);
6926 if (sizeof (struct GNUNET_MESH_ToOrigin) +
6927 sizeof (struct GNUNET_MessageHeader) > size)
6930 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6934 /* Tunnel exists? */
6935 tid = ntohl (data_msg->tid);
6936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6937 "Got a ToOrigin request from a client! Tunnel %X\n", tid);
6938 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6941 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6944 t = tunnel_get_by_local_id (c, tid);
6948 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6952 /* It should be sent by someone who has this as incoming tunnel. */
6953 if (GNUNET_NO == client_knows_tunnel (c, t))
6956 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6960 /* PID should be as expected */
6961 clinfo = tunnel_get_client_fc (t, c);
6962 if (ntohl (data_msg->pid) != clinfo->bck_pid + 1)
6965 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6966 "To Origin PID, expected %u, got %u\n",
6967 clinfo->bck_pid + 1, ntohl (data_msg->pid));
6968 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6972 /* Ok, everything is correct, send the message
6973 * (pretend we got it from a mesh peer)
6976 char buf[ntohs (message->size)] GNUNET_ALIGN;
6977 struct GNUNET_MESH_ToOrigin *copy;
6979 /* Work around const limitation */
6980 copy = (struct GNUNET_MESH_ToOrigin *) buf;
6981 memcpy (buf, data_msg, size);
6982 GNUNET_PEER_resolve (t->id.oid, ©->oid);
6983 copy->tid = htonl (t->id.tid);
6984 copy->ttl = htonl (default_ttl);
6985 GNUNET_assert (ntohl (copy->pid) == (t->bck_pid + 1));
6986 copy->sender = my_full_id;
6987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6988 " calling generic handler...\n");
6989 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
6991 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6997 * Handler for client traffic directed to all peers in a tunnel
6999 * @param cls closure
7000 * @param client identification of the client
7001 * @param message the actual message
7004 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
7005 const struct GNUNET_MessageHeader *message)
7007 struct MeshClient *c;
7008 struct MeshTunnel *t;
7009 struct GNUNET_MESH_Multicast *data_msg;
7010 MESH_TunnelNumber tid;
7012 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7013 "Got a multicast request from a client!\n");
7015 /* Sanity check for client registration */
7016 if (NULL == (c = client_get (client)))
7019 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7022 data_msg = (struct GNUNET_MESH_Multicast *) message;
7023 /* Sanity check for message size */
7024 if (sizeof (struct GNUNET_MESH_Multicast) +
7025 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
7028 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7032 /* Tunnel exists? */
7033 tid = ntohl (data_msg->tid);
7034 t = tunnel_get_by_local_id (c, tid);
7038 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7042 /* Does client own tunnel? */
7043 if (t->owner->handle != client)
7046 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7050 /* PID should be as expected */
7051 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7054 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7055 "Multicast PID, expected %u, got %u\n",
7056 t->fwd_pid + 1, ntohl (data_msg->pid));
7057 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7062 char buf[ntohs (message->size)] GNUNET_ALIGN;
7063 struct GNUNET_MESH_Multicast *copy;
7065 copy = (struct GNUNET_MESH_Multicast *) buf;
7066 memcpy (buf, message, ntohs (message->size));
7067 copy->oid = my_full_id;
7068 copy->tid = htonl (t->id.tid);
7069 copy->ttl = htonl (default_ttl);
7070 GNUNET_assert (ntohl (copy->pid) == (t->fwd_pid + 1));
7071 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7072 " calling generic handler...\n");
7073 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
7076 /* receive done gets called when last copy is sent to a neighbor */
7082 * Handler for client's ACKs for payload traffic.
7084 * @param cls Closure (unused).
7085 * @param client Identification of the client.
7086 * @param message The actual message.
7089 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
7090 const struct GNUNET_MessageHeader *message)
7092 struct GNUNET_MESH_LocalAck *msg;
7093 struct MeshTunnel *t;
7094 struct MeshClient *c;
7095 MESH_TunnelNumber tid;
7097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
7098 /* Sanity check for client registration */
7099 if (NULL == (c = client_get (client)))
7102 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7106 msg = (struct GNUNET_MESH_LocalAck *) message;
7107 /* Tunnel exists? */
7108 tid = ntohl (msg->tunnel_id);
7109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7110 t = tunnel_get_by_local_id (c, tid);
7114 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7118 /* Does client own tunnel? I.E: Is this and ACK for BCK traffic? */
7119 if (NULL != t->owner && t->owner->handle == client)
7121 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
7122 t->bck_ack = ntohl(msg->max_pid);
7123 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7127 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
7128 tunnel_set_client_fwd_ack (t, c, ntohl (msg->max_pid));
7129 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7132 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7138 * Functions to handle messages from clients
7140 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
7141 {&handle_local_new_client, NULL,
7142 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
7143 {&handle_local_announce_regex, NULL,
7144 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
7145 {&handle_local_tunnel_create, NULL,
7146 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
7147 sizeof (struct GNUNET_MESH_TunnelMessage)},
7148 {&handle_local_tunnel_destroy, NULL,
7149 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
7150 sizeof (struct GNUNET_MESH_TunnelMessage)},
7151 {&handle_local_tunnel_speed, NULL,
7152 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
7153 sizeof (struct GNUNET_MESH_TunnelMessage)},
7154 {&handle_local_tunnel_speed, NULL,
7155 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
7156 sizeof (struct GNUNET_MESH_TunnelMessage)},
7157 {&handle_local_tunnel_buffer, NULL,
7158 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
7159 sizeof (struct GNUNET_MESH_TunnelMessage)},
7160 {&handle_local_tunnel_buffer, NULL,
7161 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
7162 sizeof (struct GNUNET_MESH_TunnelMessage)},
7163 {&handle_local_connect_add, NULL,
7164 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
7165 sizeof (struct GNUNET_MESH_PeerControl)},
7166 {&handle_local_connect_del, NULL,
7167 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
7168 sizeof (struct GNUNET_MESH_PeerControl)},
7169 {&handle_local_blacklist, NULL,
7170 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
7171 sizeof (struct GNUNET_MESH_PeerControl)},
7172 {&handle_local_unblacklist, NULL,
7173 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
7174 sizeof (struct GNUNET_MESH_PeerControl)},
7175 {&handle_local_connect_by_type, NULL,
7176 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
7177 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
7178 {&handle_local_connect_by_string, NULL,
7179 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
7180 {&handle_local_unicast, NULL,
7181 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
7182 {&handle_local_to_origin, NULL,
7183 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
7184 {&handle_local_multicast, NULL,
7185 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
7186 {&handle_local_ack, NULL,
7187 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
7188 sizeof (struct GNUNET_MESH_LocalAck)},
7194 * To be called on core init/fail.
7196 * @param cls service closure
7197 * @param server handle to the server for this service
7198 * @param identity the public identity of this peer
7201 core_init (void *cls, struct GNUNET_CORE_Handle *server,
7202 const struct GNUNET_PeerIdentity *identity)
7204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
7205 core_handle = server;
7206 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
7209 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
7210 GNUNET_SCHEDULER_shutdown ();
7217 * Method called whenever a given peer connects.
7219 * @param cls closure
7220 * @param peer peer identity this notification is about
7221 * @param atsi performance data for the connection
7222 * @param atsi_count number of records in 'atsi'
7225 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
7226 const struct GNUNET_ATS_Information *atsi,
7227 unsigned int atsi_count)
7229 struct MeshPeerInfo *peer_info;
7230 struct MeshPeerPath *path;
7232 DEBUG_CONN ("Peer connected\n");
7233 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
7234 peer_info = peer_info_get (peer);
7235 if (myid == peer_info->id)
7237 DEBUG_CONN (" (self)\n");
7242 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
7244 path = path_new (2);
7245 path->peers[0] = myid;
7246 path->peers[1] = peer_info->id;
7247 GNUNET_PEER_change_rc (myid, 1);
7248 GNUNET_PEER_change_rc (peer_info->id, 1);
7249 peer_info_add_path (peer_info, path, GNUNET_YES);
7250 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
7256 * Method called whenever a peer disconnects.
7258 * @param cls closure
7259 * @param peer peer identity this notification is about
7262 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
7264 struct MeshPeerInfo *pi;
7265 struct MeshPeerQueue *q;
7266 struct MeshPeerQueue *n;
7268 DEBUG_CONN ("Peer disconnected\n");
7269 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
7281 /* try to reroute this traffic instead */
7282 queue_destroy(q, GNUNET_YES);
7286 peer_info_remove_path (pi, pi->id, myid);
7289 DEBUG_CONN (" (self)\n");
7291 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
7296 /******************************************************************************/
7297 /************************ MAIN FUNCTIONS ****************************/
7298 /******************************************************************************/
7301 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
7303 * @param cls closure
7304 * @param key current key code
7305 * @param value value in the hash map
7306 * @return GNUNET_YES if we should continue to iterate,
7310 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
7312 struct MeshTunnel *t = value;
7319 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
7321 * @param cls closure
7322 * @param key current key code
7323 * @param value value in the hash map
7324 * @return GNUNET_YES if we should continue to iterate,
7328 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
7330 struct MeshPeerInfo *p = value;
7331 struct MeshPeerQueue *q;
7332 struct MeshPeerQueue *n;
7340 queue_destroy(q, GNUNET_YES);
7344 peer_info_destroy (p);
7349 * Task run during shutdown.
7355 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
7357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
7359 if (core_handle != NULL)
7361 GNUNET_CORE_disconnect (core_handle);
7364 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
7365 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
7366 if (dht_handle != NULL)
7368 GNUNET_DHT_disconnect (dht_handle);
7373 GNUNET_SERVER_notification_context_destroy (nc);
7376 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
7378 GNUNET_SCHEDULER_cancel (announce_id_task);
7379 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
7381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
7385 * Process mesh requests.
7387 * @param cls closure
7388 * @param server the initialized server
7389 * @param c configuration to use
7392 run (void *cls, struct GNUNET_SERVER_Handle *server,
7393 const struct GNUNET_CONFIGURATION_Handle *c)
7395 struct MeshPeerInfo *peer;
7396 struct MeshPeerPath *p;
7399 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
7400 server_handle = server;
7401 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
7402 NULL, /* Closure passed to MESH functions */
7403 &core_init, /* Call core_init once connected */
7404 &core_connect, /* Handle connects */
7405 &core_disconnect, /* remove peers on disconnects */
7406 NULL, /* Don't notify about all incoming messages */
7407 GNUNET_NO, /* For header only in notification */
7408 NULL, /* Don't notify about all outbound messages */
7409 GNUNET_NO, /* For header-only out notification */
7410 core_handlers); /* Register these handlers */
7412 if (core_handle == NULL)
7415 GNUNET_SCHEDULER_shutdown ();
7420 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
7423 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7425 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7427 GNUNET_SCHEDULER_shutdown ();
7432 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
7433 &refresh_path_time))
7435 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7437 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7438 "refresh path time");
7439 GNUNET_SCHEDULER_shutdown ();
7444 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
7445 &app_announce_time))
7447 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7449 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7450 "app announce time");
7451 GNUNET_SCHEDULER_shutdown ();
7456 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
7459 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7461 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7462 "id announce time");
7463 GNUNET_SCHEDULER_shutdown ();
7468 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
7469 &unacknowledged_wait_time))
7471 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7473 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7474 "unacknowledged wait time");
7475 GNUNET_SCHEDULER_shutdown ();
7480 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
7483 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7485 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7487 GNUNET_SCHEDULER_shutdown ();
7492 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
7495 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7497 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7499 GNUNET_SCHEDULER_shutdown ();
7504 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
7507 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7509 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7511 GNUNET_SCHEDULER_shutdown ();
7516 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
7519 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7521 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
7527 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
7528 &dht_replication_level))
7530 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7532 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
7533 "dht replication level", 10);
7534 dht_replication_level = 10;
7538 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7539 GNUNET_free (keyfile);
7540 if (my_private_key == NULL)
7542 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7543 _("Mesh service could not access hostkey. Exiting.\n"));
7544 GNUNET_SCHEDULER_shutdown ();
7547 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7548 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
7549 &my_full_id.hashPubKey);
7550 myid = GNUNET_PEER_intern (&my_full_id);
7552 // transport_handle = GNUNET_TRANSPORT_connect(c,
7559 dht_handle = GNUNET_DHT_connect (c, 64);
7560 if (dht_handle == NULL)
7565 stats = GNUNET_STATISTICS_create ("mesh", c);
7569 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
7571 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
7572 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
7573 peers = GNUNET_CONTAINER_multihashmap_create (32);
7574 applications = GNUNET_CONTAINER_multihashmap_create (32);
7575 types = GNUNET_CONTAINER_multihashmap_create (32);
7577 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
7578 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
7579 GNUNET_SERVER_disconnect_notify (server_handle,
7580 &handle_local_client_disconnect, NULL);
7584 clients_tail = NULL;
7587 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
7588 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
7590 /* Create a peer_info for the local peer */
7591 peer = peer_info_get (&my_full_id);
7594 GNUNET_PEER_change_rc (myid, 1);
7595 peer_info_add_path (peer, p, GNUNET_YES);
7597 /* Scheduled the task to clean up when shutdown is called */
7598 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
7601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "end of run()\n");
7605 * The main function for the mesh service.
7607 * @param argc number of arguments from the command line
7608 * @param argv command line arguments
7609 * @return 0 ok, 1 on error
7612 main (int argc, char *const *argv)
7616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
7619 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
7621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");