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
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
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_NO
61 #define MESH_DEBUG_CONNECTION GNUNET_NO
62 #define MESH_DEBUG_TIMING GNUNET_YES
64 #if MESH_DEBUG_CONNECTION
65 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
67 #define DEBUG_CONN(...)
71 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
73 #define DEBUG_DHT(...)
80 struct timespec __mesh_start;
81 struct timespec __mesh_end;
82 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
83 #define INTERVAL_END \
85 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
86 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
87 if (__diff < 0) __diff += 1000000000;\
91 #define INTERVAL_SHOW \
93 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
95 #define INTERVAL_START
100 /******************************************************************************/
101 /************************ DATA STRUCTURES ****************************/
102 /******************************************************************************/
104 /** FWD declaration */
110 * Struct representing a piece of data being sent to other peers
114 /** Tunnel it belongs to. */
115 struct MeshTunnel *t;
117 /** In case of a multicast, task to allow a client to send more data if
118 * some neighbor is too slow. */
119 GNUNET_SCHEDULER_TaskIdentifier *task;
121 /** How many remaining neighbors we need to send this to. */
122 unsigned int *reference_counter;
124 /** Size of the data. */
133 * Struct containing info about a queued transmission to this peer
140 struct MeshPeerQueue *next;
145 struct MeshPeerQueue *prev;
148 * Peer this transmission is directed to.
150 struct MeshPeerInfo *peer;
153 * Tunnel this message belongs to.
155 struct MeshTunnel *tunnel;
158 * Pointer to info stucture used as cls.
168 * Size of the message
175 * Struct containing all info possibly needed to build a package when called
178 struct MeshTransmissionDescriptor
180 /** ID of the tunnel this packet travels in */
181 struct MESH_TunnelID *origin;
183 /** Who was this message being sent to */
184 struct MeshPeerInfo *peer;
186 /** Ultimate destination of the packet */
187 GNUNET_PEER_Id destination;
189 /** Data descriptor */
190 struct MeshData* mesh_data;
195 * Struct containing all information regarding a given peer
205 * Last time we heard from this peer
207 struct GNUNET_TIME_Absolute last_contact;
210 * Number of attempts to reconnect so far
212 int n_reconnect_attempts;
215 * Paths to reach the peer, ordered by ascending hop count
217 struct MeshPeerPath *path_head;
220 * Paths to reach the peer, ordered by ascending hop count
222 struct MeshPeerPath *path_tail;
225 * Handle to stop the DHT search for a path to this peer
227 struct GNUNET_DHT_GetHandle *dhtget;
230 * Closure given to the DHT GET
232 struct MeshPathInfo *dhtgetcls;
235 * Array of tunnels this peer participates in
236 * (most probably a small amount, therefore not a hashmap)
237 * When the path to the peer changes, notify these tunnels to let them
238 * re-adjust their path trees.
240 struct MeshTunnel **tunnels;
243 * Number of tunnels this peers participates in
245 unsigned int ntunnels;
248 * Transmission queue to core DLL head
250 struct MeshPeerQueue *queue_head;
253 * Transmission queue to core DLL tail
255 struct MeshPeerQueue *queue_tail;
258 * How many messages are in the queue to this peer.
260 unsigned int queue_n;
263 * Handle to for queued transmissions
265 struct GNUNET_CORE_TransmitHandle *core_transmit;
270 * Globally unique tunnel identification (owner + number)
271 * DO NOT USE OVER THE NETWORK
276 * Node that owns the tunnel
281 * Tunnel number to differentiate all the tunnels owned by the node oid
282 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
284 MESH_TunnelNumber tid;
289 * Struct containing all information regarding a tunnel
290 * For an intermediate node the improtant info used will be:
291 * - id Tunnel unique identification
292 * - paths[0] To know where to send it next
293 * - metainfo: ready, speeds, accounting
300 struct MESH_TunnelID id;
303 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
305 MESH_TunnelNumber local_tid;
308 * Local tunnel number for local destination clients (incoming number)
309 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
312 MESH_TunnelNumber local_tid_dest;
315 * Is the speed on the tunnel limited to the slowest peer?
320 * Is the tunnel bufferless (minimum latency)?
325 * Packet ID of the last fwd packet seen (sent/retransmitted/received).
330 * Packet ID of the last bck packet sent (unique counter per hop).
335 * SKIP value for this tunnel.
340 * MeshTunnelChildInfo of all children, indexed by GNUNET_PEER_Id.
341 * Contains the Flow Control info: FWD ACK value received,
342 * last BCK ACK sent, PID and SKIP values.
344 struct GNUNET_CONTAINER_MultiHashMap *children_fc;
347 * Last ACK sent towards the origin (for traffic towards leaf node).
349 uint32_t last_fwd_ack;
352 * BCK ACK value received from the hop towards the owner of the tunnel,
353 * (previous node / owner): up to what message PID can we sent back to him.
358 * How many messages are in the forward queue (towards leaves).
360 unsigned int fwd_queue_n;
363 * How many messages do we accept in the forward queue.
365 unsigned int fwd_queue_max;
368 * How many messages are in the backward queue (towards origin).
370 unsigned int bck_queue_n;
373 * How many messages do we accept in the backward queue.
375 unsigned int bck_queue_max;
378 * Last time the tunnel was used
380 struct GNUNET_TIME_Absolute timestamp;
383 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
384 * containing peers added by id or by type, not intermediate peers.
386 struct GNUNET_CONTAINER_MultiHashMap *peers;
389 * Number of peers that are connected and potentially ready to receive data
391 unsigned int peers_ready;
394 * Number of peers that have been added to the tunnel
396 unsigned int peers_total;
399 * Client owner of the tunnel, if any
401 struct MeshClient *owner;
404 * Clients that have been informed about and want to stay in the tunnel.
406 struct MeshClient **clients;
409 * Flow control info for each client.
411 struct MeshTunnelClientInfo *clients_fc;
414 * Number of elements in clients/clients_fc
416 unsigned int nclients;
419 * Clients that have been informed but requested to leave the tunnel.
421 struct MeshClient **ignore;
424 * Number of elements in clients
426 unsigned int nignore;
431 GNUNET_PEER_Id *blacklisted;
434 * Number of elements in blacklisted
436 unsigned int nblacklisted;
439 * Bloomfilter (for peer identities) to stop circular routes
441 char bloomfilter[MESH_BLOOM_SIZE];
446 struct MeshTunnelTree *tree;
449 * Application type we are looking for in this tunnel
451 GNUNET_MESH_ApplicationType type;
454 * Used to search peers offering a service
456 struct GNUNET_DHT_GetHandle *dht_get_type;
459 * Initial context of the regex search for a connect_by_string
461 struct MeshRegexSearchContext *regex_ctx;
464 * Task to keep the used paths alive
466 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
469 * Task to destroy the tunnel after timeout
471 * FIXME: merge the two? a tunnel will have either
472 * a path refresh OR a timeout, never both!
474 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
477 * Flag to signal the destruction of the tunnel.
478 * If this is set GNUNET_YES the tunnel will be destroyed
479 * when the queue is empty.
486 * Info about a child node in a tunnel, needed to perform flow control.
488 struct MeshTunnelChildInfo
491 * ID of the child node.
506 * Maximum PID allowed (FWD ACK received).
511 * Last ACK sent to that child (BCK ACK).
518 * Info about a leaf client of a tunnel, needed to perform flow control.
520 struct MeshTunnelClientInfo
523 * PID of the last packet sent to the client (FWD).
528 * PID of the last packet received from the client (BCK).
533 * Maximum PID allowed (FWD ACK received).
538 * Last ACK sent to that child (BCK ACK).
546 * Info collected during iteration of child nodes in order to get the ACK value
549 struct MeshTunnelChildIteratorContext
552 * Tunnel whose info is being collected.
554 struct MeshTunnel *t;
557 * Is this context initialized? Is the value in max_child_ack valid?
562 * Maximum child ACK so far.
564 uint32_t max_child_ack;
567 * Number of children nodes
569 unsigned int nchildren;
574 * Info needed to work with tunnel paths and peers
581 struct MeshTunnel *t;
584 * Neighbouring peer to whom we send the packet to
586 struct MeshPeerInfo *peer;
591 struct MeshPeerPath *path;
596 * Struct containing information about a client of the service
603 struct MeshClient *next;
608 struct MeshClient *prev;
611 * Tunnels that belong to this client, indexed by local id
613 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
616 * Tunnels this client has accepted, indexed by incoming local id
618 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
621 * Tunnels this client has rejected, indexed by incoming local id
623 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
625 * Handle to communicate with the client
627 struct GNUNET_SERVER_Client *handle;
630 * Applications that this client has claimed to provide
632 struct GNUNET_CONTAINER_MultiHashMap *apps;
635 * Messages that this client has declared interest in
637 struct GNUNET_CONTAINER_MultiHashMap *types;
640 * Whether the client is active or shutting down (don't send confirmations
641 * to a client that is shutting down.
646 * ID of the client, mainly for debug messages
651 * Regular expressions describing the services offered by this client.
653 char **regexes; // FIXME add timeout? API to remove a regex?
656 * Number of regular expressions in regexes.
658 unsigned int n_regex;
661 * Task to refresh all regular expresions in the DHT.
663 GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
669 * Struct to keep information of searches of services described by a regex
670 * using a user-provided string service description.
672 struct MeshRegexSearchInfo
675 * Which tunnel is this for
677 struct MeshTunnel *t;
680 * User provided description of the searched service.
685 * Part of the description already consumed by the search.
692 struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
695 * Results from running DHT GETs.
697 struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
700 * Contexts, for each running DHT GET. Free all on end of search.
702 struct MeshRegexSearchContext **contexts;
705 * Number of contexts (branches/steps in search).
707 unsigned int n_contexts;
710 * Peer that is connecting via connect_by_string. When connected, free ctx.
715 * Other peers that are found but not yet being connected to.
717 GNUNET_PEER_Id *peers;
720 * Number of elements in peers.
722 unsigned int n_peers;
725 * Next peer to try to connect to.
730 * Timeout for a connect attempt.
731 * When reached, try to connect to a different peer, if any. If not,
732 * try the same peer again.
734 GNUNET_SCHEDULER_TaskIdentifier timeout;
739 * Struct to keep state of running searches that have consumed a part of
742 struct MeshRegexSearchContext
745 * Part of the description already consumed by
746 * this particular search branch.
751 * Information about the search.
753 struct MeshRegexSearchInfo *info;
757 /******************************************************************************/
758 /************************ DEBUG FUNCTIONS ****************************/
759 /******************************************************************************/
763 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
764 * @param cls string to print
765 * @param success GNUNET_OK if the PUT was transmitted,
766 * GNUNET_NO on timeout,
767 * GNUNET_SYSERR on disconnect from service
768 * after the PUT message was transmitted
769 * (so we don't know if it was received or not)
774 mesh_debug (void *cls, int success)
778 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
784 /******************************************************************************/
785 /*********************** GLOBAL VARIABLES ****************************/
786 /******************************************************************************/
789 * Configuration parameters
791 static struct GNUNET_TIME_Relative refresh_path_time;
792 static struct GNUNET_TIME_Relative app_announce_time;
793 static struct GNUNET_TIME_Relative id_announce_time;
794 static struct GNUNET_TIME_Relative unacknowledged_wait_time;
795 static struct GNUNET_TIME_Relative connect_timeout;
796 static long long unsigned int default_ttl;
797 static long long unsigned int dht_replication_level;
798 static long long unsigned int max_tunnels;
799 static long long unsigned int max_msgs_queue;
802 * DLL with all the clients, head.
804 static struct MeshClient *clients;
807 * DLL with all the clients, tail.
809 static struct MeshClient *clients_tail;
812 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
814 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
817 * Number of tunnels known.
819 static unsigned long long n_tunnels;
822 * Tunnels incoming, indexed by MESH_TunnelNumber
823 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
825 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
828 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
830 static struct GNUNET_CONTAINER_MultiHashMap *peers;
833 * Handle to communicate with transport
835 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
838 * Handle to communicate with core.
840 static struct GNUNET_CORE_Handle *core_handle;
845 static struct GNUNET_DHT_Handle *dht_handle;
850 static struct GNUNET_SERVER_Handle *server_handle;
853 * Handle to the statistics service.
855 static struct GNUNET_STATISTICS_Handle *stats;
858 * Notification context, to send messages to local clients.
860 static struct GNUNET_SERVER_NotificationContext *nc;
863 * Local peer own ID (memory efficient handle).
865 static GNUNET_PEER_Id myid;
868 * Local peer own ID (full value).
870 static struct GNUNET_PeerIdentity my_full_id;
875 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
880 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
883 * Tunnel ID for the next created tunnel (global tunnel number).
885 static MESH_TunnelNumber next_tid;
888 * Tunnel ID for the next incoming tunnel (local tunnel number).
890 static MESH_TunnelNumber next_local_tid;
893 * All application types provided by this peer.
895 static struct GNUNET_CONTAINER_MultiHashMap *applications;
898 * All message types clients of this peer are interested in.
900 static struct GNUNET_CONTAINER_MultiHashMap *types;
903 * Task to periodically announce provided applications.
905 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
908 * Task to periodically announce itself in the network.
910 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
913 * Next ID to assign to a client.
915 unsigned int next_client_id;
918 /******************************************************************************/
919 /*********************** DECLARATIONS **************************/
920 /******************************************************************************/
922 /* FIXME move declarations here */
925 * Function to process paths received for a new peer addition. The recorded
926 * paths form the initial tunnel, which can be optimized later.
927 * Called on each result obtained for the DHT search.
930 * @param exp when will this value expire
931 * @param key key of the result
932 * @param type type of the result
933 * @param size number of bytes in data
934 * @param data pointer to the result data
937 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
938 const struct GNUNET_HashCode * key,
939 const struct GNUNET_PeerIdentity *get_path,
940 unsigned int get_path_length,
941 const struct GNUNET_PeerIdentity *put_path,
942 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
943 size_t size, const void *data);
947 * Function to process DHT string to regex matching.
948 * Called on each result obtained for the DHT search.
950 * @param cls closure (search context)
951 * @param exp when will this value expire
952 * @param key key of the result
953 * @param get_path path of the get request (not used)
954 * @param get_path_length lenght of get_path (not used)
955 * @param put_path path of the put request (not used)
956 * @param put_path_length length of the put_path (not used)
957 * @param type type of the result
958 * @param size number of bytes in data
959 * @param data pointer to the result data
961 * TODO: re-issue the request after certain time? cancel after X results?
964 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
965 const struct GNUNET_HashCode * key,
966 const struct GNUNET_PeerIdentity *get_path,
967 unsigned int get_path_length,
968 const struct GNUNET_PeerIdentity *put_path,
969 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
970 size_t size, const void *data);
974 * Function to process DHT string to regex matching.
975 * Called on each result obtained for the DHT search.
977 * @param cls closure (search context)
978 * @param exp when will this value expire
979 * @param key key of the result
980 * @param get_path path of the get request (not used)
981 * @param get_path_length lenght of get_path (not used)
982 * @param put_path path of the put request (not used)
983 * @param put_path_length length of the put_path (not used)
984 * @param type type of the result
985 * @param size number of bytes in data
986 * @param data pointer to the result data
989 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
990 const struct GNUNET_HashCode * key,
991 const struct GNUNET_PeerIdentity *get_path,
992 unsigned int get_path_length,
993 const struct GNUNET_PeerIdentity *put_path,
994 unsigned int put_path_length,
995 enum GNUNET_BLOCK_Type type,
996 size_t size, const void *data);
1000 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1001 * and insert it in the appropiate structures if the peer is not known yet.
1003 * @param peer Short identity of the peer.
1005 * @return Existing or newly created peer info.
1007 static struct MeshPeerInfo *
1008 peer_info_get_short (const GNUNET_PEER_Id peer);
1012 * Try to establish a new connection to this peer.
1013 * Use the best path for the given tunnel.
1014 * If the peer doesn't have any path to it yet, try to get one.
1015 * If the peer already has some path, send a CREATE PATH towards it.
1017 * @param peer PeerInfo of the peer.
1018 * @param t Tunnel for which to create the path, if possible.
1021 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
1025 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1026 * needed rescources.
1027 * If peer already exists, reevaluate shortest path and change if different.
1029 * @param t Tunnel we want to add a new peer to
1030 * @param peer PeerInfo of the peer being added
1034 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
1038 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1039 * that are no longer needed, as well as nodes of no longer reachable peers.
1040 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1042 * @param t Tunnel from which to remove the path.
1043 * @param peer Short id of the peer which should be removed.
1046 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
1050 * Search for a tunnel by global ID using full PeerIdentities.
1052 * @param oid owner of the tunnel.
1053 * @param tid global tunnel number.
1055 * @return tunnel handler, NULL if doesn't exist.
1057 static struct MeshTunnel *
1058 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
1062 * Delete an active client from the tunnel.
1068 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
1071 * Notify a tunnel that a connection has broken that affects at least
1072 * some of its peers.
1074 * @param t Tunnel affected.
1075 * @param p1 Peer that got disconnected from p2.
1076 * @param p2 Peer that got disconnected from p1.
1078 * @return Short ID of the peer disconnected (either p1 or p2).
1079 * 0 if the tunnel remained unaffected.
1081 static GNUNET_PEER_Id
1082 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1087 * Get the current ack value for a tunnel, for data going from root to leaves,
1088 * taking in account the tunnel mode and the status of all children and clients.
1092 * @return Maximum PID allowed.
1095 tunnel_get_fwd_ack (struct MeshTunnel *t);
1099 * Add a client to a tunnel, initializing all needed data structures.
1101 * @param t Tunnel to which add the client.
1102 * @param c Client which to add to the tunnel.
1105 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c);
1109 * Iterator over edges in a regex block retrieved from the DHT.
1111 * @param cls Closure.
1112 * @param token Token that follows to next state.
1113 * @param len Lenght of token.
1114 * @param key Hash of next state.
1116 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1119 regex_edge_iterator (void *cls,
1122 const struct GNUNET_HashCode *key);
1126 * Find a path to a peer that offers a regex servcie compatible
1127 * with a given string.
1129 * @param key The key of the accepting state.
1130 * @param ctx Context containing info about the string, tunnel, etc.
1133 regex_find_path (const struct GNUNET_HashCode *key,
1134 struct MeshRegexSearchContext *ctx);
1138 * Queue and pass message to core when possible.
1140 * @param cls Closure (type dependant).
1141 * @param type Type of the message, 0 for a raw message.
1142 * @param size Size of the message.
1143 * @param dst Neighbor to send message to.
1144 * @param t Tunnel this message belongs to.
1147 queue_add (void *cls, uint16_t type, size_t size,
1148 struct MeshPeerInfo *dst, struct MeshTunnel *t);
1151 * Free a transmission that was already queued with all resources
1152 * associated to the request.
1154 * @param queue Queue handler to cancel.
1155 * @param clear_cls Is it necessary to free associated cls?
1158 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1160 /******************************************************************************/
1161 /************************ ITERATORS ****************************/
1162 /******************************************************************************/
1165 * Iterator over found existing mesh regex blocks that match an ongoing search.
1167 * @param cls closure
1168 * @param key current key code
1169 * @param value value in the hash map
1170 * @return GNUNET_YES if we should continue to iterate,
1174 regex_result_iterator (void *cls,
1175 const struct GNUNET_HashCode * key,
1178 struct MeshRegexBlock *block = value;
1179 struct MeshRegexSearchContext *ctx = cls;
1181 if (GNUNET_YES == ntohl(block->accepting) &&
1182 ctx->position == strlen (ctx->info->description))
1184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
1185 regex_find_path (key, ctx);
1186 return GNUNET_YES; // We found an accept state!
1190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
1191 ctx->position, strlen(ctx->info->description),
1192 ntohl(block->accepting));
1195 (void) GNUNET_MESH_regex_block_iterate (block, SIZE_MAX,
1196 ®ex_edge_iterator, ctx);
1203 * Iterator over edges in a regex block retrieved from the DHT.
1205 * @param cls Closure (context of the search).
1206 * @param token Token that follows to next state.
1207 * @param len Lenght of token.
1208 * @param key Hash of next state.
1210 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1213 regex_edge_iterator (void *cls,
1216 const struct GNUNET_HashCode *key)
1218 struct MeshRegexSearchContext *ctx = cls;
1219 struct MeshRegexSearchContext *new_ctx;
1220 struct MeshRegexSearchInfo *info = ctx->info;
1221 struct GNUNET_DHT_GetHandle *get_h;
1225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
1226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
1227 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
1228 current = &info->description[ctx->position];
1229 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
1230 current_len = strlen (info->description) - ctx->position;
1231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
1233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tk[0] : %c\n", token[0]);
1234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
1235 if (len > current_len)
1237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
1238 return GNUNET_YES; // Token too long, wont match
1240 if (0 != strncmp (current, token, len))
1242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
1243 return GNUNET_YES; // Token doesn't match
1245 new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
1246 new_ctx->info = info;
1247 new_ctx->position = ctx->position + len;
1248 GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
1250 GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, key))
1252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
1253 GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results, key,
1254 ®ex_result_iterator,
1256 return GNUNET_YES; // We are already looking for it
1258 /* Start search in DHT */
1260 GNUNET_DHT_get_start (dht_handle, /* handle */
1261 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
1262 key, /* key to search */
1263 dht_replication_level, /* replication level */
1264 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1265 NULL, /* xquery */ // FIXME BLOOMFILTER
1266 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1267 &dht_get_string_handler, new_ctx);
1269 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles, key, get_h,
1270 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1275 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
1280 * Iterator over hash map entries to cancel DHT GET requests after a
1281 * successful connect_by_string.
1283 * @param cls Closure (unused).
1284 * @param key Current key code (unused).
1285 * @param value Value in the hash map (get handle).
1286 * @return GNUNET_YES if we should continue to iterate,
1290 regex_cancel_dht_get (void *cls,
1291 const struct GNUNET_HashCode * key,
1294 struct GNUNET_DHT_GetHandle *h = value;
1296 GNUNET_DHT_get_stop (h);
1302 * Iterator over hash map entries to free MeshRegexBlocks stored during the
1303 * search for connect_by_string.
1305 * @param cls Closure (unused).
1306 * @param key Current key code (unused).
1307 * @param value MeshRegexBlock in the hash map.
1308 * @return GNUNET_YES if we should continue to iterate,
1312 regex_free_result (void *cls,
1313 const struct GNUNET_HashCode * key,
1317 GNUNET_free (value);
1323 * Regex callback iterator to store own service description in the DHT.
1325 * @param cls closure.
1326 * @param key hash for current state.
1327 * @param proof proof for current state.
1328 * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
1329 * @param num_edges number of edges leaving current state.
1330 * @param edges edges leaving current state.
1333 regex_iterator (void *cls, const struct GNUNET_HashCode *key, const char *proof,
1334 int accepting, unsigned int num_edges,
1335 const struct GNUNET_REGEX_Edge *edges)
1337 struct MeshRegexBlock *block;
1338 struct MeshRegexEdge *block_edge;
1339 enum GNUNET_DHT_RouteOption opt;
1343 unsigned int offset;
1346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1347 " regex dht put for state %s\n",
1349 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1356 opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
1357 if (GNUNET_YES == accepting)
1359 struct MeshRegexAccept block;
1361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1362 " state %s is accepting, putting own id\n",
1364 size = sizeof (block);
1366 block.id = my_full_id;
1368 GNUNET_DHT_put(dht_handle, key,
1369 dht_replication_level,
1370 opt | GNUNET_DHT_RO_RECORD_ROUTE,
1371 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
1374 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1379 len = strlen(proof);
1380 size = sizeof (struct MeshRegexBlock) + len;
1381 block = GNUNET_malloc (size);
1384 block->n_proof = htonl (len);
1385 block->n_edges = htonl (num_edges);
1386 block->accepting = htonl (accepting);
1388 /* Store the proof at the end of the block. */
1389 aux = (char *) &block[1];
1390 memcpy (aux, proof, len);
1393 /* Store each edge in a variable length MeshEdge struct at the
1394 * very end of the MeshRegexBlock structure.
1396 for (i = 0; i < num_edges; i++)
1398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1399 " edge %s towards %s\n",
1401 GNUNET_h2s(&edges[i].destination));
1403 /* aux points at the end of the last block */
1404 len = strlen (edges[i].label);
1405 size += sizeof (struct MeshRegexEdge) + len;
1406 // Calculate offset FIXME is this ok? use size instead?
1407 offset = aux - (char *) block;
1408 block = GNUNET_realloc (block, size);
1409 aux = &((char *) block)[offset];
1410 block_edge = (struct MeshRegexEdge *) aux;
1411 block_edge->key = edges[i].destination;
1412 block_edge->n_token = htonl (len);
1413 aux = (char *) &block_edge[1];
1414 memcpy (aux, edges[i].label, len);
1418 GNUNET_DHT_put(dht_handle, key,
1419 dht_replication_level,
1421 GNUNET_BLOCK_TYPE_MESH_REGEX, size,
1423 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1427 GNUNET_free (block);
1432 * Store the regular expression describing a local service into the DHT.
1434 * @param regex The regular expresion.
1437 regex_put (const char *regex)
1439 struct GNUNET_REGEX_Automaton *dfa;
1441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) start\n", regex);
1442 dfa = GNUNET_REGEX_construct_dfa (regex, strlen(regex));
1443 GNUNET_REGEX_iterate_all_edges (dfa, ®ex_iterator, NULL);
1444 GNUNET_REGEX_automaton_destroy (dfa);
1445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "regex_put (%s) end\n", regex);
1450 * Find a path to a peer that offers a regex servcie compatible
1451 * with a given string.
1453 * @param key The key of the accepting state.
1454 * @param ctx Context containing info about the string, tunnel, etc.
1457 regex_find_path (const struct GNUNET_HashCode *key,
1458 struct MeshRegexSearchContext *ctx)
1460 struct GNUNET_DHT_GetHandle *get_h;
1462 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
1463 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
1464 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
1465 key, /* key to search */
1466 dht_replication_level, /* replication level */
1467 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE |
1468 GNUNET_DHT_RO_RECORD_ROUTE,
1469 NULL, /* xquery */ // FIXME BLOOMFILTER
1470 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
1471 &dht_get_string_accept_handler, ctx);
1472 GNUNET_break (GNUNET_OK ==
1473 GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
1476 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1481 * Function called if the connect attempt to a peer found via
1482 * connect_by_string times out. Try to connect to another peer, if any.
1483 * Otherwise try to reconnect to the same peer.
1485 * @param cls Closure (info about regex search).
1486 * @param tc TaskContext.
1489 regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1491 struct MeshRegexSearchInfo *info = cls;
1492 struct MeshPeerInfo *peer_info;
1496 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
1497 info->timeout = GNUNET_SCHEDULER_NO_TASK;
1498 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
1506 if (0 < info->n_peers)
1508 // Select next peer, put current in that spot.
1509 id = info->peers[info->i_peer];
1510 info->peers[info->i_peer] = info->peer;
1511 info->i_peer = (info->i_peer + 1) % info->n_peers;
1515 // Try to connect to same peer again.
1518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
1520 peer_info = peer_info_get_short(id);
1521 tunnel_add_peer (info->t, peer_info);
1523 tunnel_delete_peer (info->t, old);
1524 peer_info_connect (peer_info, info->t);
1525 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
1526 ®ex_connect_timeout,
1528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
1533 * Cancel an ongoing regex search in the DHT and free all resources.
1535 * @param ctx The search context.
1538 regex_cancel_search(struct MeshRegexSearchContext *ctx)
1540 struct MeshRegexSearchInfo *info = ctx->info;
1543 GNUNET_free (info->description);
1544 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
1545 ®ex_cancel_dht_get, NULL);
1546 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
1547 ®ex_free_result, NULL);
1548 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
1549 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
1550 info->t->regex_ctx = NULL;
1551 for (i = 0; i < info->n_contexts; i++)
1553 GNUNET_free (info->contexts[i]);
1555 if (0 < info->n_contexts)
1556 GNUNET_free (info->contexts);
1557 if (0 < info->n_peers)
1558 GNUNET_free (info->peers);
1559 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
1561 GNUNET_SCHEDULER_cancel(info->timeout);
1567 /******************************************************************************/
1568 /************************ PERIODIC FUNCTIONS ****************************/
1569 /******************************************************************************/
1572 * Announce iterator over for each application provided by the peer
1574 * @param cls closure
1575 * @param key current key code
1576 * @param value value in the hash map
1577 * @return GNUNET_YES if we should continue to
1582 announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
1584 struct PBlock block;
1585 struct MeshClient *c;
1587 block.id = my_full_id;
1588 c = GNUNET_CONTAINER_multihashmap_get (applications, key);
1589 block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
1590 if (0 == block.type)
1595 block.type = htonl (block.type);
1597 GNUNET_break (NULL !=
1598 GNUNET_DHT_put (dht_handle, key,
1599 dht_replication_level,
1600 GNUNET_DHT_RO_RECORD_ROUTE |
1601 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1602 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
1604 (const char *) &block,
1605 GNUNET_TIME_absolute_add (GNUNET_TIME_absolute_get (),
1607 app_announce_time, NULL, NULL));
1613 * Periodically announce what applications are provided by local clients
1616 * @param cls closure
1617 * @param tc task context
1620 announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1622 struct MeshClient *c = cls;
1625 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1627 c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
1631 DEBUG_DHT ("Starting PUT for regex\n");
1633 for (i = 0; i < c->n_regex; i++)
1635 regex_put (c->regexes[i]);
1637 c->regex_announce_task =
1638 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_regex, cls);
1639 DEBUG_DHT ("Finished PUT for regex\n");
1646 * Periodically announce what applications are provided by local clients
1649 * @param cls closure
1650 * @param tc task context
1653 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1655 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1657 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
1661 DEBUG_DHT ("Starting PUT for apps\n");
1663 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
1665 announce_applications_task =
1666 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
1668 DEBUG_DHT ("Finished PUT for apps\n");
1675 * Periodically announce self id in the DHT
1677 * @param cls closure
1678 * @param tc task context
1681 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1683 struct PBlock block;
1685 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1687 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1691 * - Set data expiration in function of X
1692 * - Adapt X to churn
1694 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1696 block.id = my_full_id;
1697 block.type = htonl (0);
1698 GNUNET_DHT_put (dht_handle, /* DHT handle */
1699 &my_full_id.hashPubKey, /* Key to use */
1700 dht_replication_level, /* Replication level */
1701 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1702 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1703 sizeof (block), /* Size of the data */
1704 (const char *) &block, /* Data itself */
1705 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1706 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1707 NULL, /* Continuation */
1708 NULL); /* Continuation closure */
1710 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1714 /******************************************************************************/
1715 /****************** GENERAL HELPER FUNCTIONS ************************/
1716 /******************************************************************************/
1719 * Decrements the reference counter and frees all resources if needed
1721 * @param mesh_data Data Descriptor used in a multicast message.
1722 * Freed no longer needed (last message).
1725 data_descriptor_decrement_rc (struct MeshData *mesh_data)
1727 /* Make sure it's a multicast packet */
1728 GNUNET_assert (NULL != mesh_data->reference_counter);
1730 if (0 == --(*(mesh_data->reference_counter)))
1732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1733 if (NULL != mesh_data->task)
1735 if (GNUNET_SCHEDULER_NO_TASK != *(mesh_data->task))
1737 GNUNET_SCHEDULER_cancel (*(mesh_data->task));
1738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client...\n");
1739 GNUNET_SERVER_receive_done (mesh_data->t->owner->handle, GNUNET_OK);
1741 GNUNET_free (mesh_data->task);
1743 GNUNET_free (mesh_data->reference_counter);
1744 GNUNET_free (mesh_data->data);
1745 GNUNET_free (mesh_data);
1751 * Check if client has registered with the service and has not disconnected
1753 * @param client the client to check
1755 * @return non-NULL if client exists in the global DLL
1757 static struct MeshClient *
1758 client_get (struct GNUNET_SERVER_Client *client)
1760 struct MeshClient *c;
1765 if (c->handle == client)
1774 * Checks if a given client has subscribed to certain message type
1776 * @param message_type Type of message to check
1777 * @param c Client to check
1779 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
1781 * FIXME: use of crypto_hash slows it down
1782 * The hash function alone takes 8-10us out of the ~55us for the whole
1783 * process of retransmitting the message from one local client to another.
1784 * Find faster implementation!
1787 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1789 struct GNUNET_HashCode hc;
1791 if (NULL == c->types)
1794 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1795 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1800 * Allow a client to send more data after transmitting a multicast message
1801 * which some neighbor has not yet accepted altough a reasonable time has
1804 * @param cls Closure (DataDescriptor containing the task identifier)
1805 * @param tc Task Context
1807 * FIXME reference counter cshould be just int
1810 client_allow_send (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1812 struct MeshData *mdata = cls;
1814 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1816 GNUNET_assert (NULL != mdata->reference_counter);
1817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1818 "CLIENT ALLOW SEND DESPITE %u COPIES PENDING\n",
1819 *(mdata->reference_counter));
1820 *(mdata->task) = GNUNET_SCHEDULER_NO_TASK;
1821 GNUNET_SERVER_receive_done (mdata->t->owner->handle, GNUNET_OK);
1826 * Check whether client wants traffic from a tunnel.
1828 * @param c Client to check.
1829 * @param t Tunnel to be found.
1831 * @return GNUNET_YES if client knows tunnel.
1833 * TODO look in client hashmap
1836 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1840 for (i = 0; i < t->nclients; i++)
1841 if (t->clients[i] == c)
1848 * Check whether client has been informed about a tunnel.
1850 * @param c Client to check.
1851 * @param t Tunnel to be found.
1853 * @return GNUNET_YES if client knows tunnel.
1855 * TODO look in client hashmap
1858 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1862 for (i = 0; i < t->nignore; i++)
1863 if (t->ignore[i] == c)
1865 return client_wants_tunnel(c, t);
1870 * Marks a client as uninterested in traffic from the tunnel, updating both
1871 * client and tunnel to reflect this.
1873 * @param c Client that doesn't want traffic anymore.
1874 * @param t Tunnel which should be ignored.
1876 * FIXME when to delete an incoming tunnel?
1879 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1881 struct GNUNET_HashCode hash;
1883 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1884 GNUNET_break (GNUNET_YES ==
1885 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1887 GNUNET_break (GNUNET_YES ==
1888 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
1889 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1890 tunnel_delete_active_client (t, c);
1891 GNUNET_array_append (t->ignore, t->nignore, c);
1896 * Deletes a tunnel from a client (either owner or destination). To be used on
1897 * tunnel destroy, otherwise, use client_ignore_tunnel.
1899 * @param c Client whose tunnel to delete.
1900 * @param t Tunnel which should be deleted.
1903 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1905 struct GNUNET_HashCode hash;
1909 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1910 GNUNET_assert (GNUNET_YES ==
1911 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
1917 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1919 GNUNET_assert (GNUNET_YES ==
1920 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1924 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
1932 * Send the message to all clients that have subscribed to its type
1934 * @param msg Pointer to the message itself
1935 * @param payload Pointer to the payload of the message.
1936 * @param t The tunnel to whose clients this message goes.
1938 * @return number of clients this message was sent to
1941 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
1942 const struct GNUNET_MessageHeader *payload,
1943 struct MeshTunnel *t)
1945 struct MeshClient *c;
1946 MESH_TunnelNumber *tid;
1949 char cbuf[htons (msg->size)];
1951 type = ntohs (payload->type);
1952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
1953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %s\n",
1954 GNUNET_MESH_DEBUG_M2S (type));
1956 memcpy (cbuf, msg, sizeof (cbuf));
1957 switch (htons (msg->type))
1959 struct GNUNET_MESH_Unicast *uc;
1960 struct GNUNET_MESH_Multicast *mc;
1961 struct GNUNET_MESH_ToOrigin *to;
1963 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1964 uc = (struct GNUNET_MESH_Unicast *) cbuf;
1967 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
1968 mc = (struct GNUNET_MESH_Multicast *) cbuf;
1971 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1972 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
1980 for (count = 0, c = clients; c != NULL; c = c->next)
1982 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
1983 if (client_is_subscribed (type, c))
1985 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
1989 *tid = htonl (t->local_tid);
1993 if (GNUNET_NO == client_knows_tunnel (c, t))
1995 /* This client doesn't know the tunnel */
1996 struct GNUNET_MESH_TunnelNotification tmsg;
1997 struct GNUNET_HashCode hash;
1999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
2000 tmsg.header.size = htons (sizeof (tmsg));
2001 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2002 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
2003 tmsg.tunnel_id = htonl (t->local_tid_dest);
2004 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2005 &tmsg.header, GNUNET_NO);
2006 tunnel_add_client (t, c);
2007 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2009 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2010 c->incoming_tunnels, &hash, t,
2011 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2013 *tid = htonl (t->local_tid_dest);
2016 /* Check if the client wants to get traffic from the tunnel */
2017 if (GNUNET_NO == client_wants_tunnel(c, t))
2020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
2021 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2022 (struct GNUNET_MessageHeader
2023 *) cbuf, GNUNET_NO);
2032 * Notify the client that owns the tunnel that a peer has connected to it
2033 * (the requested path to it has been confirmed).
2035 * @param t Tunnel whose owner to notify
2036 * @param id Short id of the peer that has connected
2039 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
2041 struct GNUNET_MESH_PeerControl pc;
2043 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2044 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2045 pc.tunnel_id = htonl (t->local_tid);
2046 GNUNET_PEER_resolve (id, &pc.peer);
2047 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
2053 * Notify all clients (not depending on registration status) that the incoming
2054 * tunnel is no longer valid.
2056 * @param t Tunnel that was destroyed.
2059 send_clients_tunnel_destroy (struct MeshTunnel *t)
2061 struct GNUNET_MESH_TunnelMessage msg;
2063 msg.header.size = htons (sizeof (msg));
2064 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2065 msg.tunnel_id = htonl (t->local_tid_dest);
2066 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
2071 * Notify clients of tunnel disconnections, if needed.
2072 * In case the origin disconnects, the destination clients get a tunnel destroy
2073 * notification. If the last destination disconnects (only one remaining client
2074 * in tunnel), the origin gets a (local ID) peer disconnected.
2075 * Note that the function must be called BEFORE removing the client from
2078 * @param t Tunnel that was destroyed.
2079 * @param c Client that disconnected.
2082 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2088 struct GNUNET_MESH_TunnelMessage msg;
2090 msg.header.size = htons (sizeof (msg));
2091 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2092 msg.tunnel_id = htonl (t->local_tid_dest);
2093 for (i = 0; i < t->nclients; i++)
2094 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2095 &msg.header, GNUNET_NO);
2097 // FIXME when to disconnect an incoming tunnel?
2098 else if (1 == t->nclients && NULL != t->owner)
2100 struct GNUNET_MESH_PeerControl msg;
2102 msg.header.size = htons (sizeof (msg));
2103 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2104 msg.tunnel_id = htonl (t->local_tid);
2105 msg.peer = my_full_id;
2106 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2107 &msg.header, GNUNET_NO);
2113 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2114 * and insert it in the appropiate structures if the peer is not known yet.
2116 * @param peer Full identity of the peer.
2118 * @return Existing or newly created peer info.
2120 static struct MeshPeerInfo *
2121 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2123 struct MeshPeerInfo *peer_info;
2125 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2126 if (NULL == peer_info)
2129 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2130 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2131 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2132 peer_info->id = GNUNET_PEER_intern (peer);
2140 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2141 * and insert it in the appropiate structures if the peer is not known yet.
2143 * @param peer Short identity of the peer.
2145 * @return Existing or newly created peer info.
2147 static struct MeshPeerInfo *
2148 peer_info_get_short (const GNUNET_PEER_Id peer)
2150 struct GNUNET_PeerIdentity id;
2152 GNUNET_PEER_resolve (peer, &id);
2153 return peer_info_get (&id);
2158 * Iterator to remove the tunnel from the list of tunnels a peer participates
2161 * @param cls Closure (tunnel info)
2162 * @param key GNUNET_PeerIdentity of the peer (unused)
2163 * @param value PeerInfo of the peer
2165 * @return always GNUNET_YES, to keep iterating
2168 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2170 struct MeshTunnel *t = cls;
2171 struct MeshPeerInfo *peer = value;
2174 for (i = 0; i < peer->ntunnels; i++)
2177 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2180 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2181 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2190 * Core callback to write a pre-constructed data packet to core buffer
2192 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2193 * @param size Number of bytes available in buf.
2194 * @param buf Where the to write the message.
2196 * @return number of bytes written to buf
2199 send_core_data_raw (void *cls, size_t size, void *buf)
2201 struct MeshTransmissionDescriptor *info = cls;
2202 struct GNUNET_MessageHeader *msg;
2205 GNUNET_assert (NULL != info);
2206 GNUNET_assert (NULL != info->mesh_data);
2207 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2208 total_size = ntohs (msg->size);
2210 if (total_size > size)
2215 memcpy (buf, msg, total_size);
2216 data_descriptor_decrement_rc (info->mesh_data);
2223 * Sends an already built non-multicast message to a peer,
2224 * properly registrating all used resources.
2226 * @param message Message to send. Function makes a copy of it.
2227 * @param peer Short ID of the neighbor whom to send the message.
2228 * @param t Tunnel on which this message is transmitted.
2231 send_message (const struct GNUNET_MessageHeader *message,
2232 const struct GNUNET_PeerIdentity *peer,
2233 struct MeshTunnel *t)
2235 struct MeshTransmissionDescriptor *info;
2236 struct MeshPeerInfo *neighbor;
2237 struct MeshPeerPath *p;
2241 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2243 size = ntohs (message->size);
2244 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2245 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2246 info->mesh_data->data = GNUNET_malloc (size);
2247 memcpy (info->mesh_data->data, message, size);
2248 type = ntohs(message->type);
2249 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2251 struct GNUNET_MESH_Unicast *m;
2253 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2254 m->ttl = htonl (ntohl (m->ttl) - 1);
2256 info->mesh_data->data_len = size;
2257 info->mesh_data->reference_counter = GNUNET_malloc (sizeof (unsigned int));
2258 *info->mesh_data->reference_counter = 1;
2259 neighbor = peer_info_get (peer);
2260 for (p = neighbor->path_head; NULL != p; p = p->next)
2270 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2271 " %s IS NOT DIRECTLY CONNECTED\n",
2273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2276 for (p = neighbor->path_head; NULL != p; p = p->next)
2278 struct GNUNET_PeerIdentity debug_id;
2281 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2282 " path with %u hops through:\n",
2284 for (i = 0; i < p->length; i++)
2286 GNUNET_PEER_resolve(p->peers[i], &debug_id);
2287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2289 i, GNUNET_i2s(&debug_id));
2293 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2294 GNUNET_free (info->mesh_data->data);
2295 GNUNET_free (info->mesh_data);
2299 info->peer = neighbor;
2300 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
2303 * TODO: in this case we only need the service to retransmit
2304 * the message down the path. If we pass the real type to queue_add,
2305 * queue_send will try to build the message from scratch. This can
2306 * probably be done by some other way instead of deleteing the type
2320 * Sends a CREATE PATH message for a path to a peer, properly registrating
2321 * all used resources.
2323 * @param peer PeerInfo of the final peer for whom this path is being created.
2324 * @param p Path itself.
2325 * @param t Tunnel for which the path is created.
2328 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2329 struct MeshTunnel *t)
2331 struct GNUNET_PeerIdentity id;
2332 struct MeshPathInfo *path_info;
2333 struct MeshPeerInfo *neighbor;
2339 p = tree_get_path_to_peer (t->tree, peer->id);
2346 for (i = 0; i < p->length; i++)
2348 if (p->peers[i] == myid)
2351 if (i >= p->length - 1)
2357 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2359 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2360 path_info->path = p;
2362 neighbor = peer_info_get (&id);
2363 path_info->peer = neighbor;
2364 queue_add (path_info,
2365 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2366 sizeof (struct GNUNET_MESH_ManipulatePath) +
2367 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2374 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2376 * @param t Tunnel whose path to destroy.
2377 * @param destination Short ID of the peer to whom the path to destroy.
2380 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2382 struct MeshPeerPath *p;
2385 p = tree_get_path_to_peer (t->tree, destination);
2391 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2392 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2394 struct GNUNET_MESH_ManipulatePath *msg;
2395 struct GNUNET_PeerIdentity *pi;
2399 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2400 msg->header.size = htons (size);
2401 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2402 msg->tid = htonl (t->id.tid);
2403 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2404 for (i = 0; i < p->length; i++)
2406 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2408 send_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2415 * Try to establish a new connection to this peer.
2416 * Use the best path for the given tunnel.
2417 * If the peer doesn't have any path to it yet, try to get one.
2418 * If the peer already has some path, send a CREATE PATH towards it.
2420 * @param peer PeerInfo of the peer.
2421 * @param t Tunnel for which to create the path, if possible.
2424 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2426 struct MeshPeerPath *p;
2427 struct MeshPathInfo *path_info;
2429 if (NULL != peer->path_head)
2431 p = tree_get_path_to_peer (t->tree, peer->id);
2438 // FIXME always send create path to self
2441 send_create_path (peer, p, t);
2445 struct GNUNET_HashCode hash;
2448 send_client_peer_connected (t, myid);
2449 t->local_tid_dest = next_local_tid++;
2450 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2453 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2454 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2461 else if (NULL == peer->dhtget)
2463 struct GNUNET_PeerIdentity id;
2465 GNUNET_PEER_resolve (peer->id, &id);
2466 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2467 path_info->peer = peer;
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2471 peer->dhtgetcls = path_info;
2472 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2473 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2474 &id.hashPubKey, /* key to search */
2475 dht_replication_level, /* replication level */
2476 GNUNET_DHT_RO_RECORD_ROUTE |
2477 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2478 NULL, /* xquery */ // FIXME BLOOMFILTER
2479 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2480 &dht_get_id_handler, path_info);
2482 /* Otherwise, there is no path but the DHT get is already started. */
2487 * Task to delay the connection of a peer
2489 * @param cls Closure (path info with tunnel and peer to connect).
2490 * Will be free'd on exection.
2491 * @param tc TaskContext
2494 peer_info_connect_task (void *cls,
2495 const struct GNUNET_SCHEDULER_TaskContext *tc)
2497 struct MeshPathInfo *path_info = cls;
2499 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2504 peer_info_connect (path_info->peer, path_info->t);
2510 * Destroy the peer_info and free any allocated resources linked to it
2512 * @param pi The peer_info to destroy.
2514 * @return GNUNET_OK on success
2517 peer_info_destroy (struct MeshPeerInfo *pi)
2519 struct GNUNET_PeerIdentity id;
2520 struct MeshPeerPath *p;
2521 struct MeshPeerPath *nextp;
2523 GNUNET_PEER_resolve (pi->id, &id);
2524 GNUNET_PEER_change_rc (pi->id, -1);
2527 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2530 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2531 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2533 if (NULL != pi->dhtget)
2535 GNUNET_DHT_get_stop (pi->dhtget);
2536 GNUNET_free (pi->dhtgetcls);
2542 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2552 * Remove all paths that rely on a direct connection between p1 and p2
2553 * from the peer itself and notify all tunnels about it.
2555 * @param peer PeerInfo of affected peer.
2556 * @param p1 GNUNET_PEER_Id of one peer.
2557 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2560 * TODO: optimize (see below)
2563 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2566 struct MeshPeerPath *p;
2567 struct MeshPeerPath *aux;
2568 struct MeshPeerInfo *peer_d;
2570 unsigned int destroyed;
2575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2577 p = peer->path_head;
2581 for (i = 0; i < (p->length - 1); i++)
2583 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2584 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2586 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2597 for (i = 0; i < peer->ntunnels; i++)
2599 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2603 * Problem: one or more peers have been deleted from the tunnel tree.
2604 * We don't know who they are to try to add them again.
2605 * We need to try to find a new path for each of the disconnected peers.
2606 * Some of them might already have a path to reach them that does not
2607 * involve p1 and p2. Adding all anew might render in a better tree than
2608 * the trivial immediate fix.
2610 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2611 * its children will be reachable trough him.
2613 peer_d = peer_info_get_short (d);
2616 for (p = peer_d->path_head; NULL != p; p = p->next)
2618 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2626 /* No callback, as peer will be already disconnected and a connection
2627 * scheduled by tunnel_notify_connection_broken.
2629 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2633 peer_info_connect (peer_d, peer->tunnels[i]);
2636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2641 * Add the path to the peer and update the path used to reach it in case this
2644 * @param peer_info Destination peer to add the path to.
2645 * @param path New path to add. Last peer must be the peer in arg 1.
2646 * Path will be either used of freed if already known.
2647 * @param trusted Do we trust that this path is real?
2650 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2653 struct MeshPeerPath *aux;
2657 if ((NULL == peer_info) || (NULL == path))
2660 path_destroy (path);
2663 if (path->peers[path->length - 1] != peer_info->id)
2666 path_destroy (path);
2669 if (path->length <= 2 && GNUNET_NO == trusted)
2671 /* Only allow CORE to tell us about direct paths */
2672 path_destroy (path);
2675 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2676 for (l = 1; l < path->length; l++)
2678 if (path->peers[l] == myid)
2680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2681 for (l2 = 0; l2 < path->length - l; l2++)
2683 path->peers[l2] = path->peers[l + l2];
2688 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2693 struct GNUNET_PeerIdentity id;
2695 GNUNET_PEER_resolve (peer_info->id, &id);
2696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2697 path->length, GNUNET_i2s (&id));
2700 l = path_get_length (path);
2707 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2708 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2710 l2 = path_get_length (aux);
2713 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2714 peer_info->path_tail, aux, path);
2719 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2721 path_destroy (path);
2726 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2733 * Add the path to the origin peer and update the path used to reach it in case
2734 * this is the shortest.
2735 * The path is given in peer_info -> destination, therefore we turn the path
2736 * upside down first.
2738 * @param peer_info Peer to add the path to, being the origin of the path.
2739 * @param path New path to add after being inversed.
2740 * @param trusted Do we trust that this path is real?
2743 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
2744 struct MeshPeerPath *path, int trusted)
2747 peer_info_add_path (peer_info, path, trusted);
2752 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2753 * to obtain a local peer -> destination path and interning the peer ids.
2755 * @return Newly allocated and created path
2757 static struct MeshPeerPath *
2758 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2759 unsigned int get_path_length,
2760 const struct GNUNET_PeerIdentity *put_path,
2761 unsigned int put_path_length)
2763 struct MeshPeerPath *p;
2769 GNUNET_PEER_change_rc (myid, 1);
2770 i = get_path_length;
2771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2772 for (i--; i >= 0; i--)
2774 id = GNUNET_PEER_intern (&get_path[i]);
2775 if (p->length > 0 && id == p->peers[p->length - 1])
2777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2778 GNUNET_PEER_change_rc (id, -1);
2782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2783 GNUNET_i2s (&get_path[i]));
2785 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2786 p->peers[p->length - 1] = id;
2789 i = put_path_length;
2790 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2791 for (i--; i >= 0; i--)
2793 id = GNUNET_PEER_intern (&put_path[i]);
2796 /* PUT path went through us, so discard the path up until now and start
2797 * from here to get a much shorter (and loop-free) path.
2802 if (p->length > 0 && id == p->peers[p->length - 1])
2804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2805 GNUNET_PEER_change_rc (id, -1);
2809 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2810 GNUNET_i2s (&put_path[i]));
2812 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2813 p->peers[p->length - 1] = id;
2817 if (get_path_length > 0)
2818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2819 GNUNET_i2s (&get_path[0]));
2820 if (put_path_length > 0)
2821 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2822 GNUNET_i2s (&put_path[0]));
2823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2825 for (i = 0; i < p->length; i++)
2827 struct GNUNET_PeerIdentity peer_id;
2829 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2831 GNUNET_i2s (&peer_id));
2839 * Adds a path to the peer_infos of all the peers in the path
2841 * @param p Path to process.
2842 * @param confirmed Whether we know if the path works or not.
2845 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2849 /* TODO: invert and add */
2850 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2851 for (i++; i < p->length; i++)
2853 struct MeshPeerInfo *aux;
2854 struct MeshPeerPath *copy;
2856 aux = peer_info_get_short (p->peers[i]);
2857 copy = path_duplicate (p);
2858 copy->length = i + 1;
2859 peer_info_add_path (aux, copy, GNUNET_NO);
2865 * Send keepalive packets for a peer
2867 * @param cls Closure (tunnel for which to send the keepalive).
2868 * @param tc Notification context.
2870 * TODO: implement explicit multicast keepalive?
2873 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
2877 * Search for a tunnel among the incoming tunnels
2879 * @param tid the local id of the tunnel
2881 * @return tunnel handler, NULL if doesn't exist
2883 static struct MeshTunnel *
2884 tunnel_get_incoming (MESH_TunnelNumber tid)
2886 struct GNUNET_HashCode hash;
2888 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2889 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2890 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2895 * Search for a tunnel among the tunnels for a client
2897 * @param c the client whose tunnels to search in
2898 * @param tid the local id of the tunnel
2900 * @return tunnel handler, NULL if doesn't exist
2902 static struct MeshTunnel *
2903 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2905 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2907 return tunnel_get_incoming (tid);
2911 struct GNUNET_HashCode hash;
2913 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2914 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2920 * Search for a tunnel by global ID using PEER_ID
2922 * @param pi owner of the tunnel
2923 * @param tid global tunnel number
2925 * @return tunnel handler, NULL if doesn't exist
2927 static struct MeshTunnel *
2928 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2930 struct MESH_TunnelID id;
2931 struct GNUNET_HashCode hash;
2936 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2937 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2942 * Search for a tunnel by global ID using full PeerIdentities
2944 * @param oid owner of the tunnel
2945 * @param tid global tunnel number
2947 * @return tunnel handler, NULL if doesn't exist
2949 static struct MeshTunnel *
2950 tunnel_get (struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2952 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2957 * Delete an active client from the tunnel.
2963 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
2967 for (i = 0; i < t->nclients; i++)
2969 if (t->clients[i] == c)
2971 t->clients[i] = t->clients[t->nclients - 1];
2972 t->clients_fc[i] = t->clients_fc[t->nclients - 1];
2973 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
2975 GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
2983 * Delete an ignored client from the tunnel.
2989 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
2993 for (i = 0; i < t->nignore; i++)
2995 if (t->ignore[i] == c)
2997 t->ignore[i] = t->ignore[t->nignore - 1];
2998 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
3006 * Delete a client from the tunnel. It should be only done on
3007 * client disconnection, otherwise use client_ignore_tunnel.
3013 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
3015 tunnel_delete_ignored_client (t, c);
3016 tunnel_delete_active_client (t, c);
3021 * Iterator to free MeshTunnelChildInfo of tunnel children.
3023 * @param cls Closure (tunnel info).
3024 * @param key Hash of GNUNET_PEER_Id (unused).
3025 * @param value MeshTunnelChildInfo of the child.
3027 * @return always GNUNET_YES, to keep iterating
3030 tunnel_destroy_child (void *cls,
3031 const struct GNUNET_HashCode * key,
3034 GNUNET_free (value);
3040 * Callback used to notify a client owner of a tunnel that a peer has
3041 * disconnected, most likely because of a path change.
3043 * @param cls Closure (tunnel this notification is about).
3044 * @param peer_id Short ID of disconnected peer.
3047 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
3049 struct MeshTunnel *t = cls;
3050 struct MeshPeerInfo *peer;
3051 struct MeshPathInfo *path_info;
3053 if (NULL != t->owner && NULL != nc)
3055 struct GNUNET_MESH_PeerControl msg;
3057 msg.header.size = htons (sizeof (msg));
3058 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
3059 msg.tunnel_id = htonl (t->local_tid);
3060 GNUNET_PEER_resolve (peer_id, &msg.peer);
3061 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3062 &msg.header, GNUNET_NO);
3064 peer = peer_info_get_short (peer_id);
3065 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
3066 path_info->peer = peer;
3068 GNUNET_SCHEDULER_add_now (&peer_info_connect_task, path_info);
3073 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
3074 * needed rescources.
3075 * If peer already exists, reevaluate shortest path and change if different.
3077 * @param t Tunnel we want to add a new peer to
3078 * @param peer PeerInfo of the peer being added
3082 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
3084 struct GNUNET_PeerIdentity id;
3085 struct MeshPeerPath *best_p;
3086 struct MeshPeerPath *p;
3087 unsigned int best_cost;
3090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
3091 GNUNET_PEER_resolve (peer->id, &id);
3093 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
3096 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
3097 GNUNET_assert (GNUNET_OK ==
3098 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
3100 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3103 if (NULL != (p = peer->path_head))
3106 best_cost = tree_get_path_cost (t->tree, p);
3109 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
3116 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
3117 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
3118 t->path_refresh_task =
3119 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3123 /* Start a DHT get */
3124 peer_info_connect (peer, t);
3126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3130 * Add a path to a tunnel which we don't own, just to remember the next hop.
3131 * If destination node was already in the tunnel, the first hop information
3132 * will be replaced with the new path.
3134 * @param t Tunnel we want to add a new peer to
3135 * @param p Path to add
3136 * @param own_pos Position of local node in path.
3140 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3141 unsigned int own_pos)
3143 struct GNUNET_PeerIdentity id;
3145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3146 GNUNET_assert (0 != own_pos);
3147 tree_add_path (t->tree, p, NULL, NULL);
3148 if (own_pos < p->length - 1)
3150 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3151 tree_update_first_hops (t->tree, myid, &id);
3153 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3157 * Add a client to a tunnel, initializing all needed data structures.
3159 * @param t Tunnel to which add the client.
3160 * @param c Client which to add to the tunnel.
3163 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
3165 struct MeshTunnelClientInfo clinfo;
3167 GNUNET_array_append (t->clients, t->nclients, c);
3168 clinfo.fwd_ack = t->fwd_pid + 1;
3169 clinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3170 clinfo.fwd_pid = t->fwd_pid;
3171 clinfo.bck_pid = (uint32_t) -1; // Expected next: 0
3173 GNUNET_array_append (t->clients_fc, t->nclients, clinfo);
3178 * Notifies a tunnel that a connection has broken that affects at least
3179 * some of its peers. Sends a notification towards the root of the tree.
3180 * In case the peer is the owner of the tree, notifies the client that owns
3181 * the tunnel and tries to reconnect.
3183 * @param t Tunnel affected.
3184 * @param p1 Peer that got disconnected from p2.
3185 * @param p2 Peer that got disconnected from p1.
3187 * @return Short ID of the peer disconnected (either p1 or p2).
3188 * 0 if the tunnel remained unaffected.
3190 static GNUNET_PEER_Id
3191 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3197 tree_notify_connection_broken (t->tree, p1, p2,
3198 &tunnel_notify_client_peer_disconnected,
3200 if (myid != p1 && myid != p2)
3206 if (tree_get_predecessor (t->tree) != 0)
3208 /* We are the peer still connected, notify owner of the disconnection. */
3209 struct GNUNET_MESH_PathBroken msg;
3210 struct GNUNET_PeerIdentity neighbor;
3212 msg.header.size = htons (sizeof (msg));
3213 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3214 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3215 msg.tid = htonl (t->id.tid);
3216 msg.peer1 = my_full_id;
3217 GNUNET_PEER_resolve (pid, &msg.peer2);
3218 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3219 send_message (&msg.header, &neighbor, t);
3227 * Send a multicast packet to a neighbor.
3229 * @param cls Closure (Info about the multicast packet)
3230 * @param neighbor_id Short ID of the neighbor to send the packet to.
3233 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3235 struct MeshData *mdata = cls;
3236 struct MeshTransmissionDescriptor *info;
3237 struct GNUNET_PeerIdentity neighbor;
3239 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3241 info->mesh_data = mdata;
3242 (*(mdata->reference_counter)) ++;
3243 info->destination = neighbor_id;
3244 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3246 GNUNET_i2s (&neighbor));
3247 info->peer = peer_info_get (&neighbor);
3248 GNUNET_assert (NULL != info->peer);
3250 GNUNET_MESSAGE_TYPE_MESH_MULTICAST,
3251 info->mesh_data->data_len,
3258 * Send a message in a tunnel in multicast, sending a copy to each child node
3259 * down the local one in the tunnel tree.
3261 * @param t Tunnel in which to send the data.
3262 * @param msg Message to be sent.
3263 * @param internal Has the service generated this message?
3266 tunnel_send_multicast (struct MeshTunnel *t,
3267 const struct GNUNET_MessageHeader *msg,
3270 struct MeshData *mdata;
3272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3273 " sending a multicast packet...\n");
3274 mdata = GNUNET_malloc (sizeof (struct MeshData));
3275 mdata->data_len = ntohs (msg->size);
3276 mdata->reference_counter = GNUNET_malloc (sizeof (unsigned int));
3278 mdata->data = GNUNET_malloc (mdata->data_len);
3279 memcpy (mdata->data, msg, mdata->data_len);
3280 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3282 struct GNUNET_MESH_Multicast *mcast;
3284 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3285 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3287 ntohl (mcast->ttl));
3291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3293 if (NULL != t->owner && GNUNET_YES != t->owner->shutting_down
3294 && GNUNET_NO == internal)
3296 mdata->task = GNUNET_malloc (sizeof (GNUNET_SCHEDULER_TaskIdentifier));
3298 GNUNET_SCHEDULER_add_delayed (unacknowledged_wait_time, &client_allow_send,
3300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "timeout task %u\n",
3304 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3305 if (*(mdata->reference_counter) == 0)
3307 GNUNET_free (mdata->data);
3308 GNUNET_free (mdata->reference_counter);
3309 if (NULL != mdata->task)
3311 GNUNET_SCHEDULER_cancel(*(mdata->task));
3312 GNUNET_free (mdata->task);
3313 GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
3315 // FIXME change order?
3316 GNUNET_free (mdata);
3318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3319 " sending a multicast packet done\n");
3325 * Increase the SKIP value of all peers that
3326 * have not received a unicast message.
3328 * @param cls Closure (ID of the peer that HAS received the message).
3329 * @param key ID of the neighbor.
3330 * @param value Information about the neighbor.
3332 * @return GNUNET_YES to keep iterating.
3335 tunnel_add_skip (void *cls,
3336 const struct GNUNET_HashCode * key,
3339 struct GNUNET_PeerIdentity *neighbor = cls;
3340 struct MeshTunnelChildInfo *cinfo = value;
3342 /* TODO compare only pointers? key == neighbor? */
3343 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3353 * @brief Get neighbor's Flow Control information.
3355 * Retrieves the MeshTunnelChildInfo containing Flow Control data about a direct
3356 * descendant of the local node in a certain tunnel.
3357 * If the info is not yet there (recently created path), creates the data struct
3358 * and inserts it into the tunnel info, initialized to the current tunnel ACK
3361 * @param t Tunnel related.
3362 * @param peer Neighbor whose Flow Control info is needed.
3364 * @return Neighbor's Flow Control info.
3366 static struct MeshTunnelChildInfo *
3367 tunnel_get_neighbor_fc (const struct MeshTunnel *t,
3368 const struct GNUNET_PeerIdentity *peer)
3370 struct MeshTunnelChildInfo *cinfo;
3371 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3377 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3378 cinfo->id = GNUNET_PEER_intern (peer);
3379 cinfo->skip = t->fwd_pid;
3381 delta = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3382 cinfo->fwd_ack = t->fwd_pid + delta;
3383 cinfo->bck_ack = delta;
3385 GNUNET_assert (GNUNET_OK ==
3386 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
3389 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3396 * Get the Flow Control info of a client.
3398 * @param t Tunnel on which to look.
3399 * @param c Client whose ACK to get.
3401 * @return ACK value.
3403 static struct MeshTunnelClientInfo *
3404 tunnel_get_client_fc (struct MeshTunnel *t,
3405 struct MeshClient *c)
3409 for (i = 0; i < t->nclients; i++)
3411 if (t->clients[i] != c)
3413 return &t->clients_fc[i];
3416 return NULL; // avoid compiler / coverity complaints
3421 * Iterator to get the appropiate ACK value from all children nodes.
3423 * @param cls Closue (tunnel).
3424 * @param id Id of the child node.
3427 tunnel_get_child_fwd_ack (void *cls,
3430 struct GNUNET_PeerIdentity peer_id;
3431 struct MeshTunnelChildInfo *cinfo;
3432 struct MeshTunnelChildIteratorContext *ctx = cls;
3433 struct MeshTunnel *t = ctx->t;
3436 GNUNET_PEER_resolve (id, &peer_id);
3437 cinfo = tunnel_get_neighbor_fc (t, &peer_id);
3438 ack = cinfo->fwd_ack;
3440 if (GNUNET_NO == ctx->init)
3442 ctx->max_child_ack = ack;
3443 ctx->init = GNUNET_YES;
3446 if (GNUNET_YES == t->speed_min)
3448 ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
3452 ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
3459 * Get the maximum PID allowed to transmit to any
3460 * tunnel child of the local peer, depending on the tunnel
3461 * buffering/speed settings.
3465 * @return Maximum PID allowed (uint32 MAX), -1 if node has no children.
3468 tunnel_get_children_fwd_ack (struct MeshTunnel *t)
3470 struct MeshTunnelChildIteratorContext ctx;
3472 ctx.max_child_ack = 0;
3474 tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
3476 if (0 == ctx.nchildren)
3479 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
3480 ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
3482 return (int64_t) ctx.max_child_ack;
3487 * Set the FWD ACK value of a client in a particular tunnel.
3489 * @param t Tunnel affected.
3490 * @param c Client whose ACK to set.
3491 * @param ack ACK value.
3494 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
3495 struct MeshClient *c,
3500 for (i = 0; i < t->nclients; i++)
3502 if (t->clients[i] != c)
3504 t->clients_fc[i].fwd_ack = ack;
3512 * Get the highest ACK value of all clients in a particular tunnel,
3513 * according to the buffering/speed settings.
3515 * @param t Tunnel on which to look.
3517 * @return Corresponding ACK value (max uint32_t).
3518 * If no clients are suscribed, -1.
3521 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
3526 if (0 == t->nclients)
3529 for (ack = -1, i = 0; i < t->nclients; i++)
3532 (GNUNET_YES == t->speed_min &&
3533 GNUNET_YES == GMC_is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
3534 (GNUNET_NO == t->speed_min &&
3535 GNUNET_YES == GMC_is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
3537 ack = t->clients_fc[i].fwd_ack;
3541 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
3542 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
3544 return (uint32_t) ack;
3549 * Get the current fwd ack value for a tunnel, taking in account the tunnel
3550 * mode and the status of all children nodes.
3554 * @return Maximum PID allowed.
3557 tunnel_get_fwd_ack (struct MeshTunnel *t)
3560 uint32_t buffer_free;
3565 count = t->fwd_pid - t->skip;
3566 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
3567 ack = count + buffer_free; // Might overflow 32 bits, it's ok!
3568 child_ack = tunnel_get_children_fwd_ack (t);
3569 client_ack = tunnel_get_clients_fwd_ack (t);
3570 if (-1 == child_ack)
3572 // Node has no children, child_ack AND core buffer are irrelevant.
3573 GNUNET_break (-1 != client_ack); // No children AND no clients? Not good! // FIXME fc
3574 return (uint32_t) client_ack;
3577 if (GNUNET_YES == t->speed_min)
3579 ack = GMC_min_pid ((uint32_t) child_ack, ack);
3580 ack = GMC_min_pid ((uint32_t) client_ack, ack);
3584 ack = GMC_max_pid ((uint32_t) child_ack, ack);
3585 ack = GMC_max_pid ((uint32_t) client_ack, ack);
3587 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
3588 ack = t->fwd_pid + 1; // Might overflow 32 bits, it's ok!
3589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "c %u, bf %u, ch %u, cl %u, ACK: %u\n",
3590 count, buffer_free, child_ack, client_ack, ack);
3596 * Build a local ACK message and send it to a local client.
3598 * @param t Tunnel on which to send the ACK.
3599 * @param c Client to whom send the ACK.
3600 * @param ack Value of the ACK.
3603 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
3605 struct GNUNET_MESH_LocalAck msg;
3607 msg.header.size = htons (sizeof (msg));
3608 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
3609 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
3610 msg.max_pid = htonl (ack);
3611 GNUNET_SERVER_notification_context_unicast(nc,
3618 * Build an ACK message and queue it to send to the given peer.
3620 * @param t Tunnel on which to send the ACK.
3621 * @param peer Peer to whom send the ACK.
3622 * @param ack Value of the ACK.
3625 send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
3627 struct GNUNET_MESH_ACK msg;
3629 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3630 msg.header.size = htons (sizeof (msg));
3631 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3632 msg.pid = htonl (ack);
3633 msg.tid = htonl (t->id.tid);
3635 send_message (&msg.header, peer, t);
3640 * Notify a the owner of a tunnel about how many more
3641 * payload packages will we accept on a given tunnel.
3643 * @param t Tunnel on which to send the ACK.
3646 tunnel_send_client_fwd_ack (struct MeshTunnel *t)
3650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3651 "Sending client FWD ACK on tunnel %X\n",
3654 ack = tunnel_get_fwd_ack (t);
3656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
3657 if (t->last_fwd_ack == ack)
3660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
3661 t->last_fwd_ack = ack;
3662 send_local_ack (t, t->owner, ack);
3667 * Send an ACK informing the predecessor about the available buffer space.
3668 * In case there is no predecessor, inform the owning client.
3669 * If buffering is off, send only on behalf of children or self if endpoint.
3670 * If buffering is on, send when sent to children and buffer space is free.
3671 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
3672 * the ACK itself goes "back" (towards root).
3674 * @param t Tunnel on which to send the ACK.
3675 * @param type Type of message that triggered the ACK transmission.
3678 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
3680 struct GNUNET_PeerIdentity id;
3683 if (NULL != t->owner)
3685 tunnel_send_client_fwd_ack (t);
3688 /* Is it after unicast / multicast retransmission? */
3691 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3692 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
3693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3694 "ACK due to FWD DATA retransmission\n");
3695 if (GNUNET_YES == t->nobuffer)
3697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
3700 if (t->fwd_queue_max > t->fwd_queue_n * 2)
3702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
3706 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3707 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3713 /* Ok, ACK might be necessary, what PID to ACK? */
3714 ack = tunnel_get_fwd_ack (t);
3716 /* If speed_min and not all children have ack'd, dont send yet */
3717 if (ack == t->last_fwd_ack)
3719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
3723 t->last_fwd_ack = ack;
3724 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
3725 send_ack (t, &id, ack);
3730 * Iterator to send a child node a BCK ACK to allow him to send more
3733 * @param cls Closure (tunnel).
3734 * @param id Id of the child node.
3737 tunnel_send_child_bck_ack (void *cls,
3740 struct MeshTunnel *t = cls;
3741 struct MeshTunnelChildInfo *cinfo;
3742 struct GNUNET_PeerIdentity peer;
3744 GNUNET_PEER_resolve (id, &peer);
3745 cinfo = tunnel_get_neighbor_fc (t, &peer);
3747 if (cinfo->bck_ack != cinfo->pid &&
3748 GNUNET_NO == GMC_is_pid_bigger (cinfo->bck_ack, cinfo->pid))
3752 send_ack (t, &peer, cinfo->bck_ack);
3757 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
3759 * Iterates over all clients and sends BCK ACKs to the ones that need it.
3761 * @param t Tunnel on which to send the BCK ACKs.
3764 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
3767 unsigned int tunnel_delta;
3769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Sending BCK ACK to clients\n");
3771 tunnel_delta = t->bck_ack - t->bck_pid;
3772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " tunnel delta: %u\n", tunnel_delta);
3774 /* Find client whom to allow to send to origin (with lowest buffer space) */
3775 for (i = 0; i < t->nclients; i++)
3777 struct MeshTunnelClientInfo *clinfo;
3780 clinfo = &t->clients_fc[i];
3781 delta = clinfo->bck_ack - clinfo->bck_pid;
3782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u delta: %u\n",
3783 t->clients[i]->id, delta);
3785 if ((GNUNET_NO == t->nobuffer && tunnel_delta > delta) ||
3786 (GNUNET_YES == t->nobuffer && 0 == delta))
3790 ack = clinfo->bck_pid;
3791 ack += t->nobuffer ? 1 : tunnel_delta;
3792 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3793 " sending ack to client %u: %u\n",
3794 t->clients[i]->id, ack);
3795 send_local_ack (t, t->clients[i], ack);
3796 clinfo->bck_ack = ack;
3803 * Send an ACK informing the children nodes and destination clients about
3804 * the available buffer space.
3805 * If buffering is off, send only on behalf of root (can be self).
3806 * If buffering is on, send when sent to predecessor and buffer space is free.
3807 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
3808 * the ACK itself goes "forward" (towards children/clients).
3810 * @param t Tunnel on which to send the ACK.
3811 * @param type Type of message that triggered the ACK transmission.
3814 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
3816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3817 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
3818 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
3819 /* Is it after data to_origin retransmission? */
3822 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3823 if (GNUNET_YES == t->nobuffer)
3825 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3826 " Not sending ACK, nobuffer\n");
3830 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3831 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
3837 tunnel_send_clients_bck_ack (t);
3838 tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, NULL);
3843 * Send a message to all peers in this tunnel that the tunnel is no longer
3846 * @param t The tunnel whose peers to notify.
3849 tunnel_send_destroy (struct MeshTunnel *t)
3851 struct GNUNET_MESH_TunnelDestroy msg;
3853 msg.header.size = htons (sizeof (msg));
3854 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3855 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3856 msg.tid = htonl (t->id.tid);
3857 tunnel_send_multicast (t, &msg.header, GNUNET_NO);
3862 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
3864 * @param cls Closure (Tunnel which to cancel).
3865 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
3868 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
3870 struct MeshTunnel *t = cls;
3871 struct MeshPeerInfo *peer_info;
3872 struct MeshPeerQueue *pq;
3873 struct MeshPeerQueue *next;
3875 peer_info = peer_info_get_short (neighbor_id);
3876 for (pq = peer_info->queue_head; NULL != pq; pq = next)
3879 if (pq->tunnel == t)
3881 queue_destroy (pq, GNUNET_YES);
3884 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
3886 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
3887 peer_info->core_transmit = NULL;
3892 * Destroy the tunnel and free any allocated resources linked to it.
3894 * @param t the tunnel to destroy
3896 * @return GNUNET_OK on success
3899 tunnel_destroy (struct MeshTunnel *t)
3901 struct MeshClient *c;
3902 struct GNUNET_HashCode hash;
3909 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
3915 struct GNUNET_PeerIdentity id;
3917 GNUNET_PEER_resolve (t->id.oid, &id);
3918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3919 GNUNET_i2s (&id), t->id.tid);
3921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3925 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3926 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3931 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
3934 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
3938 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
3939 for (i = 0; i < t->nclients; i++)
3943 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
3948 for (i = 0; i < t->nignore; i++)
3952 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
3957 if (t->nclients > 0)
3960 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
3964 GNUNET_free (t->clients);
3966 if (NULL != t->peers)
3968 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
3970 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
3973 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
3974 &tunnel_destroy_child,
3976 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
3978 tree_destroy (t->tree);
3980 if (NULL != t->regex_ctx)
3981 regex_cancel_search (t->regex_ctx);
3982 if (NULL != t->dht_get_type)
3983 GNUNET_DHT_get_stop (t->dht_get_type);
3984 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
3985 GNUNET_SCHEDULER_cancel (t->timeout_task);
3986 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
3987 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
3990 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
3991 GNUNET_assert (0 <= n_tunnels);
3998 * Create a new tunnel
4000 * @param owner Who is the owner of the tunnel (short ID).
4001 * @param tid Tunnel Number of the tunnel.
4002 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
4003 * @param local Tunnel Number for the tunnel, for the client point of view.
4005 * @return A new initialized tunnel. NULL on error.
4007 static struct MeshTunnel *
4008 tunnel_new (GNUNET_PEER_Id owner,
4009 MESH_TunnelNumber tid,
4010 struct MeshClient *client,
4011 MESH_TunnelNumber local)
4013 struct MeshTunnel *t;
4014 struct GNUNET_HashCode hash;
4016 if (n_tunnels >= max_tunnels && NULL == client)
4019 t = GNUNET_malloc (sizeof (struct MeshTunnel));
4022 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
4023 t->bck_queue_max = t->fwd_queue_max;
4024 t->tree = tree_new (owner);
4026 t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
4027 t->bck_pid = (uint32_t) -1; // Next (expected) = 0
4028 t->bck_ack = INITIAL_WINDOW_SIZE - 1;
4029 t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
4030 t->local_tid = local;
4031 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8);
4033 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
4035 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4037 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
4038 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4045 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4052 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4054 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
4055 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4059 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4069 * Removes an explicit path from a tunnel, freeing all intermediate nodes
4070 * that are no longer needed, as well as nodes of no longer reachable peers.
4071 * The tunnel itself is also destoyed if results in a remote empty tunnel.
4073 * @param t Tunnel from which to remove the path.
4074 * @param peer Short id of the peer which should be removed.
4077 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
4079 if (GNUNET_NO == tree_del_peer (t->tree, peer, NULL, NULL))
4085 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
4086 * client when the client disconnects. If the client is not the owner, the
4087 * owner will get notified if no more clients are in the tunnel and the client
4088 * get removed from the tunnel's list.
4090 * @param cls closure (client that is disconnecting)
4091 * @param key the hash of the local tunnel id (used to access the hashmap)
4092 * @param value the value stored at the key (tunnel to destroy)
4094 * @return GNUNET_OK on success
4097 tunnel_destroy_iterator (void *cls, const struct GNUNET_HashCode * key, void *value)
4099 struct MeshTunnel *t = value;
4100 struct MeshClient *c = cls;
4103 send_client_tunnel_disconnect(t, c);
4106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4107 "Client %u is destination, keeping the tunnel alive.\n", c->id);
4108 tunnel_delete_client(t, c);
4109 client_delete_tunnel(c, t);
4112 tunnel_send_destroy(t);
4113 r = tunnel_destroy (t);
4119 * Timeout function, destroys tunnel if called
4121 * @param cls Closure (tunnel to destroy).
4122 * @param tc TaskContext
4125 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4127 struct MeshTunnel *t = cls;
4129 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4131 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4136 * Resets the tunnel timeout. Starts it if no timeout was running.
4138 * @param t Tunnel whose timeout to reset.
4140 * TODO use heap to improve efficiency of scheduler.
4143 tunnel_reset_timeout (struct MeshTunnel *t)
4145 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4146 GNUNET_SCHEDULER_cancel (t->timeout_task);
4148 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
4149 (refresh_path_time, 4), &tunnel_timeout, t);
4153 /******************************************************************************/
4154 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4155 /******************************************************************************/
4158 * Function to send a create path packet to a peer.
4160 * @param cls closure
4161 * @param size number of bytes available in buf
4162 * @param buf where the callee should write the message
4163 * @return number of bytes written to buf
4166 send_core_path_create (void *cls, size_t size, void *buf)
4168 struct MeshPathInfo *info = cls;
4169 struct GNUNET_MESH_ManipulatePath *msg;
4170 struct GNUNET_PeerIdentity *peer_ptr;
4171 struct MeshTunnel *t = info->t;
4172 struct MeshPeerPath *p = info->path;
4177 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
4179 sizeof (struct GNUNET_MESH_ManipulatePath) +
4180 p->length * sizeof (struct GNUNET_PeerIdentity);
4182 if (size < size_needed || NULL == buf)
4187 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
4188 msg->header.size = htons (size_needed);
4189 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
4190 msg->tid = ntohl (t->id.tid);
4192 if (GNUNET_YES == t->speed_min)
4193 opt = MESH_TUNNEL_OPT_SPEED_MIN;
4194 if (GNUNET_YES == t->nobuffer)
4195 opt |= MESH_TUNNEL_OPT_NOBUFFER;
4196 msg->opt = htonl(opt);
4198 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
4199 for (i = 0; i < p->length; i++)
4201 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
4207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4208 "CREATE PATH (%u bytes long) sent!\n", size_needed);
4214 * Fill the core buffer
4216 * @param cls closure (data itself)
4217 * @param size number of bytes available in buf
4218 * @param buf where the callee should write the message
4220 * @return number of bytes written to buf
4223 send_core_data_multicast (void *cls, size_t size, void *buf)
4225 struct MeshTransmissionDescriptor *info = cls;
4228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
4229 GNUNET_assert (NULL != info);
4230 GNUNET_assert (NULL != info->peer);
4231 total_size = info->mesh_data->data_len;
4232 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
4234 if (total_size > size)
4239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
4240 memcpy (buf, info->mesh_data->data, total_size);
4243 struct GNUNET_MESH_Multicast *mc;
4244 struct GNUNET_MessageHeader *mh;
4247 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
4249 mc = (struct GNUNET_MESH_Multicast *) mh;
4250 mh = (struct GNUNET_MessageHeader *) &mc[1];
4251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4252 " multicast, payload type %s\n",
4253 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4254 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4255 " multicast, payload size %u\n", ntohs (mh->size));
4259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %s\n",
4260 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4264 data_descriptor_decrement_rc (info->mesh_data);
4265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
4267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
4273 * Creates a path ack message in buf and frees all unused resources.
4275 * @param cls closure (MeshTransmissionDescriptor)
4276 * @param size number of bytes available in buf
4277 * @param buf where the callee should write the message
4278 * @return number of bytes written to buf
4281 send_core_path_ack (void *cls, size_t size, void *buf)
4283 struct MeshTransmissionDescriptor *info = cls;
4284 struct GNUNET_MESH_PathACK *msg = buf;
4286 GNUNET_assert (NULL != info);
4287 if (sizeof (struct GNUNET_MESH_PathACK) > size)
4292 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
4293 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
4294 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
4295 msg->tid = htonl (info->origin->tid);
4296 msg->peer_id = my_full_id;
4299 /* TODO add signature */
4301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
4302 return sizeof (struct GNUNET_MESH_PathACK);
4307 * Free a transmission that was already queued with all resources
4308 * associated to the request.
4310 * @param queue Queue handler to cancel.
4311 * @param clear_cls Is it necessary to free associated cls?
4314 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4316 struct MeshTransmissionDescriptor *dd;
4317 struct MeshPathInfo *path_info;
4319 if (GNUNET_YES == clear_cls)
4321 switch (queue->type)
4323 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4324 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4325 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type payload\n");
4328 data_descriptor_decrement_rc (dd->mesh_data);
4330 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
4332 path_info = queue->cls;
4333 path_destroy (path_info->path);
4337 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type unknown!\n");
4339 GNUNET_free_non_null (queue->cls);
4341 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
4342 queue->peer->queue_tail,
4344 GNUNET_free (queue);
4349 * Core callback to write a queued packet to core buffer
4351 * @param cls Closure (peer info).
4352 * @param size Number of bytes available in buf.
4353 * @param buf Where the to write the message.
4355 * @return number of bytes written to buf
4358 queue_send (void *cls, size_t size, void *buf)
4360 struct MeshPeerInfo *peer = cls;
4361 struct GNUNET_MessageHeader *msg;
4362 struct MeshPeerQueue *queue;
4363 struct MeshTunnel *t;
4366 peer->core_transmit = NULL;
4367 queue = peer->queue_head;
4369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
4371 /* If queue is empty, send should have been cancelled */
4377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
4379 /* Check if buffer size is enough for the message */
4380 if (queue->size > size)
4382 struct GNUNET_PeerIdentity id;
4384 GNUNET_PEER_resolve (peer->id, &id);
4385 peer->core_transmit =
4386 GNUNET_CORE_notify_transmit_ready(core_handle,
4389 GNUNET_TIME_UNIT_FOREVER_REL,
4396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
4399 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
4402 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* unicast: %u\n");
4404 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
4407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
4411 switch (queue->type)
4414 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4415 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
4416 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
4417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4418 "********* raw: %u\n",
4421 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4422 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4423 data_size = send_core_data_raw (queue->cls, size, buf);
4424 msg = (struct GNUNET_MessageHeader *) buf;
4425 switch (ntohs (msg->type)) // Type of preconstructed message
4427 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4428 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
4430 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4431 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4437 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
4439 data_size = send_core_data_multicast(queue->cls, size, buf);
4440 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
4442 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
4444 data_size = send_core_path_create(queue->cls, size, buf);
4446 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
4447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
4448 data_size = send_core_path_ack(queue->cls, size, buf);
4452 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4453 "********* type unknown: %u\n",
4458 /* Free queue, but cls was freed by send_core_* */
4459 queue_destroy (queue, GNUNET_NO);
4461 if (GNUNET_YES == t->destroy && 0 == t->fwd_queue_n)
4463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
4467 /* If more data in queue, send next */
4468 if (NULL != peer->queue_head)
4470 struct GNUNET_PeerIdentity id;
4472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
4473 GNUNET_PEER_resolve (peer->id, &id);
4474 peer->core_transmit =
4475 GNUNET_CORE_notify_transmit_ready(core_handle,
4478 GNUNET_TIME_UNIT_FOREVER_REL,
4480 peer->queue_head->size,
4484 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
4490 * Queue and pass message to core when possible.
4492 * @param cls Closure (type dependant).
4493 * @param type Type of the message, 0 for a raw message.
4494 * @param size Size of the message.
4495 * @param dst Neighbor to send message to.
4496 * @param t Tunnel this message belongs to.
4499 queue_add (void *cls, uint16_t type, size_t size,
4500 struct MeshPeerInfo *dst, struct MeshTunnel *t)
4502 struct MeshPeerQueue *queue;
4507 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
4508 GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
4510 n = &t->fwd_queue_n;
4511 max = &t->fwd_queue_max;
4513 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
4515 n = &t->bck_queue_n;
4516 max = &t->bck_queue_max;
4521 if (NULL == t->owner)
4522 GNUNET_break_op(0); // TODO: kill connection?
4525 return; // Drop message
4529 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
4535 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
4536 if (NULL == dst->core_transmit)
4538 struct GNUNET_PeerIdentity id;
4540 GNUNET_PEER_resolve (dst->id, &id);
4541 dst->core_transmit =
4542 GNUNET_CORE_notify_transmit_ready(core_handle,
4545 GNUNET_TIME_UNIT_FOREVER_REL,
4554 /******************************************************************************/
4555 /******************** MESH NETWORK HANDLERS **************************/
4556 /******************************************************************************/
4560 * Core handler for path creation
4562 * @param cls closure
4563 * @param message message
4564 * @param peer peer identity this notification is about
4565 * @param atsi performance data
4566 * @param atsi_count number of records in 'atsi'
4568 * @return GNUNET_OK to keep the connection open,
4569 * GNUNET_SYSERR to close it (signal serious error)
4572 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
4573 const struct GNUNET_MessageHeader *message,
4574 const struct GNUNET_ATS_Information *atsi,
4575 unsigned int atsi_count)
4577 unsigned int own_pos;
4580 MESH_TunnelNumber tid;
4581 struct GNUNET_MESH_ManipulatePath *msg;
4582 struct GNUNET_PeerIdentity *pi;
4583 struct GNUNET_HashCode hash;
4584 struct MeshPeerPath *path;
4585 struct MeshPeerInfo *dest_peer_info;
4586 struct MeshPeerInfo *orig_peer_info;
4587 struct MeshTunnel *t;
4589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4590 "Received a path create msg [%s]\n",
4591 GNUNET_i2s (&my_full_id));
4592 size = ntohs (message->size);
4593 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4595 GNUNET_break_op (0);
4599 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4600 if (size % sizeof (struct GNUNET_PeerIdentity))
4602 GNUNET_break_op (0);
4605 size /= sizeof (struct GNUNET_PeerIdentity);
4608 GNUNET_break_op (0);
4611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4612 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4614 tid = ntohl (msg->tid);
4615 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4617 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
4618 t = tunnel_get (pi, tid);
4619 if (NULL == t) // FIXME only for INCOMING tunnels?
4623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
4624 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
4627 // FIXME notify failure
4630 opt = ntohl (msg->opt);
4631 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
4632 GNUNET_YES : GNUNET_NO;
4633 t->nobuffer = (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER)) ?
4634 GNUNET_YES : GNUNET_NO;
4636 if (GNUNET_YES == t->nobuffer)
4638 t->bck_queue_max = 1;
4639 t->fwd_queue_max = 1;
4642 // FIXME only assign a local tid if a local client is interested (on demand)
4643 while (NULL != tunnel_get_incoming (next_local_tid))
4644 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4645 t->local_tid_dest = next_local_tid++;
4646 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4649 tunnel_reset_timeout (t);
4650 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4652 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
4653 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
4661 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
4662 if (NULL == dest_peer_info)
4664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4665 " Creating PeerInfo for destination.\n");
4666 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4667 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
4668 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
4670 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4672 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
4673 if (NULL == orig_peer_info)
4675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4676 " Creating PeerInfo for origin.\n");
4677 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4678 orig_peer_info->id = GNUNET_PEER_intern (pi);
4679 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
4680 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4683 path = path_new (size);
4685 for (i = 0; i < size; i++)
4687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4688 GNUNET_i2s (&pi[i]));
4689 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4690 if (path->peers[i] == myid)
4693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4696 /* cannot be self, must be 'not found' */
4697 /* create path: self not found in path through self */
4698 GNUNET_break_op (0);
4699 path_destroy (path);
4703 path_add_to_peers (path, GNUNET_NO);
4704 tunnel_add_path (t, path, own_pos);
4705 if (own_pos == size - 1)
4707 /* It is for us! Send ack. */
4708 struct MeshTransmissionDescriptor *info;
4710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4711 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4712 if (NULL == t->peers)
4714 /* New tunnel! Notify clients on data. */
4715 t->peers = GNUNET_CONTAINER_multihashmap_create (4);
4717 GNUNET_break (GNUNET_SYSERR !=
4718 GNUNET_CONTAINER_multihashmap_put (t->peers,
4719 &my_full_id.hashPubKey,
4722 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
4723 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
4724 info->origin = &t->id;
4725 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4726 GNUNET_assert (NULL != info->peer);
4728 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4729 sizeof (struct GNUNET_MESH_PathACK),
4735 struct MeshPeerPath *path2;
4737 /* It's for somebody else! Retransmit. */
4738 path2 = path_duplicate (path);
4739 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4740 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4741 path2 = path_duplicate (path);
4742 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
4743 send_create_path (dest_peer_info, path, t);
4750 * Core handler for path destruction
4752 * @param cls closure
4753 * @param message message
4754 * @param peer peer identity this notification is about
4755 * @param atsi performance data
4756 * @param atsi_count number of records in 'atsi'
4758 * @return GNUNET_OK to keep the connection open,
4759 * GNUNET_SYSERR to close it (signal serious error)
4762 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4763 const struct GNUNET_MessageHeader *message,
4764 const struct GNUNET_ATS_Information *atsi,
4765 unsigned int atsi_count)
4767 struct GNUNET_MESH_ManipulatePath *msg;
4768 struct GNUNET_PeerIdentity *pi;
4769 struct MeshPeerPath *path;
4770 struct MeshTunnel *t;
4771 unsigned int own_pos;
4775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4776 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
4777 size = ntohs (message->size);
4778 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
4780 GNUNET_break_op (0);
4784 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
4785 if (size % sizeof (struct GNUNET_PeerIdentity))
4787 GNUNET_break_op (0);
4790 size /= sizeof (struct GNUNET_PeerIdentity);
4793 GNUNET_break_op (0);
4796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
4798 msg = (struct GNUNET_MESH_ManipulatePath *) message;
4799 pi = (struct GNUNET_PeerIdentity *) &msg[1];
4800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4801 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
4803 t = tunnel_get (pi, ntohl (msg->tid));
4806 /* TODO notify back: we don't know this tunnel */
4807 GNUNET_break_op (0);
4810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4811 path = path_new (size);
4813 for (i = 0; i < size; i++)
4815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4816 GNUNET_i2s (&pi[i]));
4817 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4818 if (path->peers[i] == myid)
4821 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4822 if (own_pos < path->length - 1)
4823 send_message (message, &pi[own_pos + 1], t);
4825 send_client_tunnel_disconnect(t, NULL);
4827 tunnel_delete_peer (t, path->peers[path->length - 1]);
4828 path_destroy (path);
4834 * Core handler for notifications of broken paths
4836 * @param cls closure
4837 * @param message message
4838 * @param peer peer identity this notification is about
4839 * @param atsi performance data
4840 * @param atsi_count number of records in 'atsi'
4842 * @return GNUNET_OK to keep the connection open,
4843 * GNUNET_SYSERR to close it (signal serious error)
4846 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4847 const struct GNUNET_MessageHeader *message,
4848 const struct GNUNET_ATS_Information *atsi,
4849 unsigned int atsi_count)
4851 struct GNUNET_MESH_PathBroken *msg;
4852 struct MeshTunnel *t;
4854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4855 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4856 msg = (struct GNUNET_MESH_PathBroken *) message;
4857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4858 GNUNET_i2s (&msg->peer1));
4859 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4860 GNUNET_i2s (&msg->peer2));
4861 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4864 GNUNET_break_op (0);
4867 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4868 GNUNET_PEER_search (&msg->peer2));
4875 * Core handler for tunnel destruction
4877 * @param cls closure
4878 * @param message message
4879 * @param peer peer identity this notification is about
4880 * @param atsi performance data
4881 * @param atsi_count number of records in 'atsi'
4883 * @return GNUNET_OK to keep the connection open,
4884 * GNUNET_SYSERR to close it (signal serious error)
4887 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4888 const struct GNUNET_MessageHeader *message,
4889 const struct GNUNET_ATS_Information *atsi,
4890 unsigned int atsi_count)
4892 struct GNUNET_MESH_TunnelDestroy *msg;
4893 struct MeshTunnel *t;
4895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4896 "Got a TUNNEL DESTROY packet from %s\n", GNUNET_i2s (peer));
4897 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for tunnel %s [%u]\n",
4899 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4900 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4903 /* Probably already got the message from another path,
4904 * destroyed the tunnel and retransmitted to children.
4907 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4910 if (t->id.oid == myid)
4912 GNUNET_break_op (0);
4915 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4917 /* Tunnel was incoming, notify clients */
4918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4919 t->local_tid, t->local_tid_dest);
4920 send_clients_tunnel_destroy (t);
4922 tunnel_send_destroy (t);
4923 t->destroy = GNUNET_YES;
4924 // TODO: add timeout to destroy the tunnel anyway
4930 * Core handler for mesh network traffic going from the origin to a peer
4932 * @param cls closure
4933 * @param peer peer identity this notification is about
4934 * @param message message
4935 * @param atsi performance data
4936 * @param atsi_count number of records in 'atsi'
4937 * @return GNUNET_OK to keep the connection open,
4938 * GNUNET_SYSERR to close it (signal serious error)
4941 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4942 const struct GNUNET_MessageHeader *message,
4943 const struct GNUNET_ATS_Information *atsi,
4944 unsigned int atsi_count)
4946 struct GNUNET_MESH_Unicast *msg;
4947 struct GNUNET_PeerIdentity *neighbor;
4948 struct MeshTunnelChildInfo *cinfo;
4949 struct MeshTunnel *t;
4950 GNUNET_PEER_Id dest_id;
4955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
4958 size = ntohs (message->size);
4960 sizeof (struct GNUNET_MESH_Unicast) +
4961 sizeof (struct GNUNET_MessageHeader))
4966 msg = (struct GNUNET_MESH_Unicast *) message;
4967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
4968 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
4970 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4973 /* TODO notify back: we don't know this tunnel */
4974 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4975 GNUNET_break_op (0);
4978 pid = ntohl (msg->pid);
4979 if (t->fwd_pid == pid)
4981 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
4982 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4983 " Already seen pid %u, DROPPING!\n", pid);
4988 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4989 " pid %u not seen yet, forwarding\n", pid);
4992 t->skip += (pid - t->fwd_pid) - 1;
4995 if (GMC_is_pid_bigger (pid, t->last_fwd_ack))
4997 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
4998 GNUNET_break_op (0);
5002 tunnel_reset_timeout (t);
5003 dest_id = GNUNET_PEER_search (&msg->destination);
5004 if (dest_id == myid)
5006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5007 " it's for us! sending to clients...\n");
5008 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
5009 send_subscribed_clients (message, &msg[1].header, t);
5010 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5013 ttl = ntohl (msg->ttl);
5014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5017 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5018 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5019 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5023 " not for us, retransmitting...\n");
5025 neighbor = tree_get_first_hop (t->tree, dest_id);
5026 cinfo = tunnel_get_neighbor_fc (t, neighbor);
5028 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
5031 if (GNUNET_YES == GMC_is_pid_bigger (pid, cinfo->fwd_ack))
5033 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5034 GNUNET_break_op (0);
5037 send_message (message, neighbor, t);
5038 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
5044 * Core handler for mesh network traffic going from the origin to all peers
5046 * @param cls closure
5047 * @param message message
5048 * @param peer peer identity this notification is about
5049 * @param atsi performance data
5050 * @param atsi_count number of records in 'atsi'
5051 * @return GNUNET_OK to keep the connection open,
5052 * GNUNET_SYSERR to close it (signal serious error)
5054 * TODO: Check who we got this from, to validate route.
5057 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5058 const struct GNUNET_MessageHeader *message,
5059 const struct GNUNET_ATS_Information *atsi,
5060 unsigned int atsi_count)
5062 struct GNUNET_MESH_Multicast *msg;
5063 struct MeshTunnel *t;
5067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
5069 size = ntohs (message->size);
5070 if (sizeof (struct GNUNET_MESH_Multicast) +
5071 sizeof (struct GNUNET_MessageHeader) > size)
5073 GNUNET_break_op (0);
5076 msg = (struct GNUNET_MESH_Multicast *) message;
5077 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5081 /* TODO notify that we dont know that tunnel */
5082 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5083 GNUNET_break_op (0);
5086 pid = ntohl (msg->pid);
5087 if (t->fwd_pid == pid)
5089 /* already seen this packet, drop */
5090 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5092 " Already seen pid %u, DROPPING!\n", pid);
5093 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5099 " pid %u not seen yet, forwarding\n", pid);
5101 t->skip += (pid - t->fwd_pid) - 1;
5103 tunnel_reset_timeout (t);
5105 /* Transmit to locally interested clients */
5106 if (NULL != t->peers &&
5107 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
5109 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
5110 send_subscribed_clients (message, &msg[1].header, t);
5111 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
5114 if (ntohl (msg->ttl) == 0)
5116 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5117 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5118 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5121 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
5122 tunnel_send_multicast (t, message, GNUNET_NO);
5128 * Core handler for mesh network traffic toward the owner of a tunnel
5130 * @param cls closure
5131 * @param message message
5132 * @param peer peer identity this notification is about
5133 * @param atsi performance data
5134 * @param atsi_count number of records in 'atsi'
5136 * @return GNUNET_OK to keep the connection open,
5137 * GNUNET_SYSERR to close it (signal serious error)
5140 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
5141 const struct GNUNET_MessageHeader *message,
5142 const struct GNUNET_ATS_Information *atsi,
5143 unsigned int atsi_count)
5145 struct GNUNET_MESH_ToOrigin *msg;
5146 struct GNUNET_PeerIdentity id;
5147 struct MeshPeerInfo *peer_info;
5148 struct MeshTunnel *t;
5152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
5154 size = ntohs (message->size);
5155 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
5156 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
5158 GNUNET_break_op (0);
5161 msg = (struct GNUNET_MESH_ToOrigin *) message;
5162 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5163 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5164 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5168 /* TODO notify that we dont know this tunnel (whom)? */
5169 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5170 GNUNET_break_op (0);
5174 if (NULL != t->owner)
5177 struct GNUNET_MESH_ToOrigin *copy;
5179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5180 " it's for us! sending to clients...\n");
5181 /* TODO signature verification */
5182 memcpy (cbuf, message, size);
5183 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
5184 copy->tid = htonl (t->local_tid);
5185 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
5186 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
5187 ©->header, GNUNET_NO);
5188 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5192 " not for us, retransmitting...\n");
5194 peer_info = peer_info_get (&msg->oid);
5195 if (NULL == peer_info)
5197 /* unknown origin of tunnel */
5201 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5202 send_message (message, &id, t);
5203 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
5210 * Core handler for mesh network traffic point-to-point acks.
5212 * @param cls closure
5213 * @param message message
5214 * @param peer peer identity this notification is about
5215 * @param atsi performance data
5216 * @param atsi_count number of records in 'atsi'
5218 * @return GNUNET_OK to keep the connection open,
5219 * GNUNET_SYSERR to close it (signal serious error)
5222 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5223 const struct GNUNET_MessageHeader *message,
5224 const struct GNUNET_ATS_Information *atsi,
5225 unsigned int atsi_count)
5227 struct GNUNET_MESH_ACK *msg;
5228 struct MeshTunnel *t;
5231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
5233 msg = (struct GNUNET_MESH_ACK *) message;
5234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5235 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5236 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5240 /* TODO notify that we dont know this tunnel (whom)? */
5241 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
5242 GNUNET_break_op (0);
5245 ack = ntohl (msg->pid);
5247 /* Is this a forward or backward ACK? */
5248 if (tree_get_predecessor(t->tree) == GNUNET_PEER_search(peer))
5250 struct MeshTunnelChildInfo *cinfo;
5252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
5253 cinfo = tunnel_get_neighbor_fc (t, peer);
5254 cinfo->fwd_ack = ack;
5255 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
5261 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5263 // FIXME fc Unlock queues?
5269 * Core handler for path ACKs
5271 * @param cls closure
5272 * @param message message
5273 * @param peer peer identity this notification is about
5274 * @param atsi performance data
5275 * @param atsi_count number of records in 'atsi'
5277 * @return GNUNET_OK to keep the connection open,
5278 * GNUNET_SYSERR to close it (signal serious error)
5281 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5282 const struct GNUNET_MessageHeader *message,
5283 const struct GNUNET_ATS_Information *atsi,
5284 unsigned int atsi_count)
5286 struct GNUNET_MESH_PathACK *msg;
5287 struct GNUNET_PeerIdentity id;
5288 struct MeshPeerInfo *peer_info;
5289 struct MeshPeerPath *p;
5290 struct MeshTunnel *t;
5292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
5293 GNUNET_i2s (&my_full_id));
5294 msg = (struct GNUNET_MESH_PathACK *) message;
5295 t = tunnel_get (&msg->oid, ntohl(msg->tid));
5298 /* TODO notify that we don't know the tunnel */
5299 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
5300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
5301 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5304 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
5305 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
5307 peer_info = peer_info_get (&msg->peer_id);
5308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
5309 GNUNET_i2s (&msg->peer_id));
5310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
5313 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
5315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5316 "connect_by_string completed, stopping search\n");
5317 regex_cancel_search (t->regex_ctx);
5318 t->regex_ctx = NULL;
5321 /* Add paths to peers? */
5322 p = tree_get_path_to_peer (t->tree, peer_info->id);
5325 path_add_to_peers (p, GNUNET_YES);
5333 /* Message for us? */
5334 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
5336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5337 if (NULL == t->owner)
5339 GNUNET_break_op (0);
5342 if (NULL != t->dht_get_type)
5344 GNUNET_DHT_get_stop (t->dht_get_type);
5345 t->dht_get_type = NULL;
5347 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
5349 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
5350 send_client_peer_connected (t, peer_info->id);
5355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5356 " not for us, retransmitting...\n");
5357 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
5358 peer_info = peer_info_get (&msg->oid);
5359 if (NULL == peer_info)
5361 /* If we know the tunnel, we should DEFINITELY know the peer */
5365 send_message (message, &id, t);
5371 * Functions to handle messages from core
5373 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
5374 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
5375 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
5376 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
5377 sizeof (struct GNUNET_MESH_PathBroken)},
5378 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
5379 sizeof (struct GNUNET_MESH_TunnelDestroy)},
5380 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
5381 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
5382 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
5383 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
5384 sizeof (struct GNUNET_MESH_ACK)},
5385 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
5386 sizeof (struct GNUNET_MESH_PathACK)},
5392 /******************************************************************************/
5393 /**************** MESH LOCAL HANDLER HELPERS ***********************/
5394 /******************************************************************************/
5397 * deregister_app: iterator for removing each application registered by a client
5399 * @param cls closure
5400 * @param key the hash of the application id (used to access the hashmap)
5401 * @param value the value stored at the key (client)
5403 * @return GNUNET_OK on success
5406 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
5408 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
5409 GNUNET_break (GNUNET_YES ==
5410 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
5416 * notify_client_connection_failure: notify a client that the connection to the
5417 * requested remote peer is not possible (for instance, no route found)
5418 * Function called when the socket is ready to queue more data. "buf" will be
5419 * NULL and "size" zero if the socket was closed for writing in the meantime.
5421 * @param cls closure
5422 * @param size number of bytes available in buf
5423 * @param buf where the callee should write the message
5424 * @return number of bytes written to buf
5427 notify_client_connection_failure (void *cls, size_t size, void *buf)
5430 struct MeshPeerInfo *peer_info;
5431 struct GNUNET_MESH_PeerControl *msg;
5432 struct GNUNET_PeerIdentity id;
5434 if (0 == size && NULL == buf)
5436 // TODO retry? cancel?
5440 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
5441 peer_info = (struct MeshPeerInfo *) cls;
5442 msg = (struct GNUNET_MESH_PeerControl *) buf;
5443 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
5444 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
5445 // msg->tunnel_id = htonl(peer_info->t->tid);
5446 GNUNET_PEER_resolve (peer_info->id, &id);
5447 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
5455 * Send keepalive packets for a peer
5457 * @param cls Closure (tunnel for which to send the keepalive).
5458 * @param tc Notification context.
5460 * TODO: implement explicit multicast keepalive?
5463 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5465 struct MeshTunnel *t = cls;
5466 struct GNUNET_MessageHeader *payload;
5467 struct GNUNET_MESH_Multicast *msg;
5469 sizeof (struct GNUNET_MESH_Multicast) +
5470 sizeof (struct GNUNET_MessageHeader);
5473 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
5477 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
5479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5480 "sending keepalive for tunnel %d\n", t->id.tid);
5482 msg = (struct GNUNET_MESH_Multicast *) cbuf;
5483 msg->header.size = htons (size);
5484 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5485 msg->oid = my_full_id;
5486 msg->tid = htonl (t->id.tid);
5487 msg->ttl = htonl (default_ttl);
5488 msg->pid = htonl (t->fwd_pid + 1);
5490 payload = (struct GNUNET_MessageHeader *) &msg[1];
5491 payload->size = htons (sizeof (struct GNUNET_MessageHeader));
5492 payload->type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
5493 tunnel_send_multicast (t, &msg->header, GNUNET_YES);
5495 t->path_refresh_task =
5496 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
5502 * Function to process paths received for a new peer addition. The recorded
5503 * paths form the initial tunnel, which can be optimized later.
5504 * Called on each result obtained for the DHT search.
5506 * @param cls closure
5507 * @param exp when will this value expire
5508 * @param key key of the result
5509 * @param get_path path of the get request
5510 * @param get_path_length lenght of get_path
5511 * @param put_path path of the put request
5512 * @param put_path_length length of the put_path
5513 * @param type type of the result
5514 * @param size number of bytes in data
5515 * @param data pointer to the result data
5517 * TODO: re-issue the request after certain time? cancel after X results?
5520 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5521 const struct GNUNET_HashCode * key,
5522 const struct GNUNET_PeerIdentity *get_path,
5523 unsigned int get_path_length,
5524 const struct GNUNET_PeerIdentity *put_path,
5525 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5526 size_t size, const void *data)
5528 struct MeshPathInfo *path_info = cls;
5529 struct MeshPeerPath *p;
5530 struct GNUNET_PeerIdentity pi;
5533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
5534 GNUNET_PEER_resolve (path_info->peer->id, &pi);
5535 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
5537 p = path_build_from_dht (get_path, get_path_length, put_path,
5539 path_add_to_peers (p, GNUNET_NO);
5541 for (i = 0; i < path_info->peer->ntunnels; i++)
5543 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
5544 peer_info_connect (path_info->peer, path_info->t);
5552 * Function to process paths received for a new peer addition. The recorded
5553 * paths form the initial tunnel, which can be optimized later.
5554 * Called on each result obtained for the DHT search.
5556 * @param cls closure
5557 * @param exp when will this value expire
5558 * @param key key of the result
5559 * @param get_path path of the get request
5560 * @param get_path_length lenght of get_path
5561 * @param put_path path of the put request
5562 * @param put_path_length length of the put_path
5563 * @param type type of the result
5564 * @param size number of bytes in data
5565 * @param data pointer to the result data
5568 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5569 const struct GNUNET_HashCode * key,
5570 const struct GNUNET_PeerIdentity *get_path,
5571 unsigned int get_path_length,
5572 const struct GNUNET_PeerIdentity *put_path,
5573 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5574 size_t size, const void *data)
5576 const struct PBlock *pb = data;
5577 const struct GNUNET_PeerIdentity *pi = &pb->id;
5578 struct MeshTunnel *t = cls;
5579 struct MeshPeerInfo *peer_info;
5580 struct MeshPeerPath *p;
5582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
5583 if (size != sizeof (struct PBlock))
5585 GNUNET_break_op (0);
5588 if (ntohl(pb->type) != t->type)
5590 GNUNET_break_op (0);
5593 GNUNET_assert (NULL != t->owner);
5594 peer_info = peer_info_get (pi);
5595 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
5597 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
5599 p = path_build_from_dht (get_path, get_path_length, put_path,
5601 path_add_to_peers (p, GNUNET_NO);
5603 tunnel_add_peer (t, peer_info);
5604 peer_info_connect (peer_info, t);
5609 * Function to process DHT string to regex matching.
5610 * Called on each result obtained for the DHT search.
5612 * @param cls closure (search context)
5613 * @param exp when will this value expire
5614 * @param key key of the result
5615 * @param get_path path of the get request (not used)
5616 * @param get_path_length lenght of get_path (not used)
5617 * @param put_path path of the put request (not used)
5618 * @param put_path_length length of the put_path (not used)
5619 * @param type type of the result
5620 * @param size number of bytes in data
5621 * @param data pointer to the result data
5624 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5625 const struct GNUNET_HashCode * key,
5626 const struct GNUNET_PeerIdentity *get_path,
5627 unsigned int get_path_length,
5628 const struct GNUNET_PeerIdentity *put_path,
5629 unsigned int put_path_length,
5630 enum GNUNET_BLOCK_Type type,
5631 size_t size, const void *data)
5633 const struct MeshRegexAccept *block = data;
5634 struct MeshRegexSearchContext *ctx = cls;
5635 struct MeshRegexSearchInfo *info = ctx->info;
5636 struct MeshPeerPath *p;
5637 struct MeshPeerInfo *peer_info;
5639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
5640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
5642 peer_info = peer_info_get(&block->id);
5643 p = path_build_from_dht (get_path, get_path_length, put_path,
5645 path_add_to_peers (p, GNUNET_NO);
5648 tunnel_add_peer (info->t, peer_info);
5649 peer_info_connect (peer_info, info->t);
5650 if (0 == info->peer)
5652 info->peer = peer_info->id;
5656 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
5659 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
5660 ®ex_connect_timeout,
5668 * Function to process DHT string to regex matching.
5669 * Called on each result obtained for the DHT search.
5671 * @param cls closure (search context)
5672 * @param exp when will this value expire
5673 * @param key key of the result
5674 * @param get_path path of the get request (not used)
5675 * @param get_path_length lenght of get_path (not used)
5676 * @param put_path path of the put request (not used)
5677 * @param put_path_length length of the put_path (not used)
5678 * @param type type of the result
5679 * @param size number of bytes in data
5680 * @param data pointer to the result data
5682 * TODO: re-issue the request after certain time? cancel after X results?
5685 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
5686 const struct GNUNET_HashCode * key,
5687 const struct GNUNET_PeerIdentity *get_path,
5688 unsigned int get_path_length,
5689 const struct GNUNET_PeerIdentity *put_path,
5690 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
5691 size_t size, const void *data)
5693 const struct MeshRegexBlock *block = data;
5694 struct MeshRegexSearchContext *ctx = cls;
5695 struct MeshRegexSearchInfo *info = ctx->info;
5699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5700 "DHT GET STRING RETURNED RESULTS\n");
5701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5702 " key: %s\n", GNUNET_h2s (key));
5704 copy = GNUNET_malloc (size);
5705 memcpy (copy, data, size);
5706 GNUNET_break (GNUNET_OK ==
5707 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
5708 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
5709 len = ntohl (block->n_proof);
5711 char proof[len + 1];
5713 memcpy (proof, &block[1], len);
5715 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
5717 GNUNET_break_op (0);
5721 len = strlen (info->description);
5722 if (len == ctx->position) // String processed
5724 if (GNUNET_YES == ntohl (block->accepting))
5726 regex_find_path(key, ctx);
5730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
5731 // FIXME REGEX this block not successful, wait for more? start timeout?
5735 GNUNET_break (GNUNET_OK ==
5736 GNUNET_MESH_regex_block_iterate (block, size,
5737 ®ex_edge_iterator, ctx));
5741 /******************************************************************************/
5742 /********************* MESH LOCAL HANDLES **************************/
5743 /******************************************************************************/
5747 * Handler for client disconnection
5749 * @param cls closure
5750 * @param client identification of the client; NULL
5751 * for the last call when the server is destroyed
5754 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
5756 struct MeshClient *c;
5757 struct MeshClient *next;
5760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
5763 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
5769 if (c->handle != client)
5771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
5775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
5777 GNUNET_SERVER_client_drop (c->handle);
5778 c->shutting_down = GNUNET_YES;
5779 GNUNET_assert (NULL != c->own_tunnels);
5780 GNUNET_assert (NULL != c->incoming_tunnels);
5781 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
5782 &tunnel_destroy_iterator, c);
5783 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
5784 &tunnel_destroy_iterator, c);
5785 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
5786 &tunnel_destroy_iterator, c);
5787 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
5788 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
5789 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
5791 /* deregister clients applications */
5792 if (NULL != c->apps)
5794 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
5795 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
5797 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
5798 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
5800 GNUNET_SCHEDULER_cancel (announce_applications_task);
5801 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
5803 if (NULL != c->types)
5804 GNUNET_CONTAINER_multihashmap_destroy (c->types);
5805 for (i = 0; i < c->n_regex; i++)
5807 GNUNET_free (c->regexes[i]);
5809 GNUNET_free_non_null (c->regexes);
5810 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
5811 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
5813 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
5814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
5816 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
5819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
5825 * Handler for new clients
5827 * @param cls closure
5828 * @param client identification of the client
5829 * @param message the actual message, which includes messages the client wants
5832 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
5833 const struct GNUNET_MessageHeader *message)
5835 struct GNUNET_MESH_ClientConnect *cc_msg;
5836 struct MeshClient *c;
5837 GNUNET_MESH_ApplicationType *a;
5844 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
5845 /* Check data sanity */
5846 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
5847 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
5848 ntypes = ntohs (cc_msg->types);
5849 napps = ntohs (cc_msg->applications);
5851 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
5854 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5858 /* Create new client structure */
5859 c = GNUNET_malloc (sizeof (struct MeshClient));
5860 c->id = next_client_id++;
5861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
5863 GNUNET_SERVER_client_keep (client);
5864 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
5867 GNUNET_MESH_ApplicationType at;
5868 struct GNUNET_HashCode hc;
5870 c->apps = GNUNET_CONTAINER_multihashmap_create (napps);
5871 for (i = 0; i < napps; i++)
5874 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
5875 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
5876 /* store in clients hashmap */
5877 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
5878 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5879 /* store in global hashmap, for announcements */
5880 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
5881 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5883 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
5884 announce_applications_task =
5885 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
5891 struct GNUNET_HashCode hc;
5893 t = (uint16_t *) & a[napps];
5894 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes);
5895 for (i = 0; i < ntypes; i++)
5898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
5899 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
5901 /* store in clients hashmap */
5902 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
5903 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5904 /* store in global hashmap */
5905 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
5906 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5910 " client has %u+%u subscriptions\n", napps, ntypes);
5912 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
5913 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5914 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5915 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
5916 GNUNET_SERVER_notification_context_add (nc, client);
5917 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
5919 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
5925 * Handler for clients announcing available services by a regular expression.
5927 * @param cls closure
5928 * @param client identification of the client
5929 * @param message the actual message, which includes messages the client wants
5932 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
5933 const struct GNUNET_MessageHeader *message)
5935 struct MeshClient *c;
5939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
5941 /* Sanity check for client registration */
5942 if (NULL == (c = client_get (client)))
5945 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5950 len = ntohs (message->size) - sizeof(struct GNUNET_MessageHeader);
5951 regex = GNUNET_malloc (len + 1);
5952 memcpy (regex, &message[1], len);
5954 GNUNET_array_append (c->regexes, c->n_regex, regex);
5955 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
5957 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
5963 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
5969 * Handler for requests of new tunnels
5971 * @param cls closure
5972 * @param client identification of the client
5973 * @param message the actual message
5976 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
5977 const struct GNUNET_MessageHeader *message)
5979 struct GNUNET_MESH_TunnelMessage *t_msg;
5980 struct MeshTunnel *t;
5981 struct MeshClient *c;
5982 MESH_TunnelNumber tid;
5984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
5986 /* Sanity check for client registration */
5987 if (NULL == (c = client_get (client)))
5990 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5993 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5995 /* Message sanity check */
5996 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5999 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6003 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6004 /* Sanity check for tunnel numbering */
6005 tid = ntohl (t_msg->tunnel_id);
6006 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
6009 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6012 /* Sanity check for duplicate tunnel IDs */
6013 if (NULL != tunnel_get_by_local_id (c, tid))
6016 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6020 while (NULL != tunnel_get_by_pi (myid, next_tid))
6021 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6022 t = tunnel_new (myid, next_tid++, c, tid);
6025 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
6027 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6030 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
6031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
6032 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
6033 t->peers = GNUNET_CONTAINER_multihashmap_create (32);
6035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
6036 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6042 * Handler for requests of deleting tunnels
6044 * @param cls closure
6045 * @param client identification of the client
6046 * @param message the actual message
6049 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
6050 const struct GNUNET_MessageHeader *message)
6052 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6053 struct MeshClient *c;
6054 struct MeshTunnel *t;
6055 MESH_TunnelNumber tid;
6057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6058 "Got a DESTROY TUNNEL from client!\n");
6060 /* Sanity check for client registration */
6061 if (NULL == (c = client_get (client)))
6064 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6069 /* Message sanity check */
6070 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
6073 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6077 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6079 /* Retrieve tunnel */
6080 tid = ntohl (tunnel_msg->tunnel_id);
6081 t = tunnel_get_by_local_id(c, tid);
6084 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6086 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6089 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6091 client_ignore_tunnel (c, t);
6093 // TODO: when to destroy incoming tunnel?
6094 if (t->nclients == 0)
6096 GNUNET_assert (GNUNET_YES ==
6097 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels,
6099 GNUNET_assert (GNUNET_YES ==
6100 GNUNET_CONTAINER_multihashmap_remove (t->peers,
6101 &my_full_id.hashPubKey,
6105 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6108 send_client_tunnel_disconnect(t, c);
6109 client_delete_tunnel(c, t);
6111 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
6113 tunnel_send_destroy (t);
6114 t->destroy = GNUNET_YES;
6115 // The tunnel will be destroyed when the last message is transmitted.
6116 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6122 * Handler for requests of seeting tunnel's speed.
6124 * @param cls Closure (unused).
6125 * @param client Identification of the client.
6126 * @param message The actual message.
6129 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
6130 const struct GNUNET_MessageHeader *message)
6132 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6133 struct MeshClient *c;
6134 struct MeshTunnel *t;
6135 MESH_TunnelNumber tid;
6137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6138 "Got a SPEED request from client!\n");
6140 /* Sanity check for client registration */
6141 if (NULL == (c = client_get (client)))
6144 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6150 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6152 /* Retrieve tunnel */
6153 tid = ntohl (tunnel_msg->tunnel_id);
6154 t = tunnel_get_by_local_id(c, tid);
6157 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
6159 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6163 switch (ntohs(message->type))
6165 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
6166 t->speed_min = GNUNET_YES;
6168 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
6169 t->speed_min = GNUNET_NO;
6174 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6179 * Handler for requests of seeting tunnel's buffering policy.
6181 * @param cls Closure (unused).
6182 * @param client Identification of the client.
6183 * @param message The actual message.
6186 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
6187 const struct GNUNET_MessageHeader *message)
6189 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
6190 struct MeshClient *c;
6191 struct MeshTunnel *t;
6192 MESH_TunnelNumber tid;
6194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6195 "Got a BUFFER request from client!\n");
6197 /* Sanity check for client registration */
6198 if (NULL == (c = client_get (client)))
6201 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6206 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
6208 /* Retrieve tunnel */
6209 tid = ntohl (tunnel_msg->tunnel_id);
6210 t = tunnel_get_by_local_id(c, tid);
6213 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
6215 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6219 switch (ntohs(message->type))
6221 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
6222 t->nobuffer = GNUNET_NO;
6224 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
6225 t->nobuffer = GNUNET_YES;
6231 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6236 * Handler for connection requests to new peers
6238 * @param cls closure
6239 * @param client identification of the client
6240 * @param message the actual message (PeerControl)
6243 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
6244 const struct GNUNET_MessageHeader *message)
6246 struct GNUNET_MESH_PeerControl *peer_msg;
6247 struct MeshPeerInfo *peer_info;
6248 struct MeshClient *c;
6249 struct MeshTunnel *t;
6250 MESH_TunnelNumber tid;
6252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
6253 /* Sanity check for client registration */
6254 if (NULL == (c = client_get (client)))
6257 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6260 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6262 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6264 /* Sanity check for message size */
6265 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6268 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6272 /* Tunnel exists? */
6273 tid = ntohl (peer_msg->tunnel_id);
6274 t = tunnel_get_by_local_id (c, tid);
6278 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6282 /* Does client own tunnel? */
6283 if (t->owner->handle != client)
6286 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
6290 GNUNET_i2s (&peer_msg->peer));
6291 peer_info = peer_info_get (&peer_msg->peer);
6293 tunnel_add_peer (t, peer_info);
6294 peer_info_connect (peer_info, t);
6296 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6302 * Handler for disconnection requests of peers in a tunnel
6304 * @param cls closure
6305 * @param client identification of the client
6306 * @param message the actual message (PeerControl)
6309 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
6310 const struct GNUNET_MessageHeader *message)
6312 struct GNUNET_MESH_PeerControl *peer_msg;
6313 struct MeshPeerInfo *peer_info;
6314 struct MeshClient *c;
6315 struct MeshTunnel *t;
6316 MESH_TunnelNumber tid;
6318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
6319 /* Sanity check for client registration */
6320 if (NULL == (c = client_get (client)))
6323 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6328 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6330 /* Sanity check for message size */
6331 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6334 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6338 /* Tunnel exists? */
6339 tid = ntohl (peer_msg->tunnel_id);
6340 t = tunnel_get_by_local_id (c, tid);
6344 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6347 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6349 /* Does client own tunnel? */
6350 if (t->owner->handle != client)
6353 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
6358 GNUNET_i2s (&peer_msg->peer));
6359 /* Is the peer in the tunnel? */
6361 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
6362 if (NULL == peer_info)
6365 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6369 /* Ok, delete peer from tunnel */
6370 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
6371 &peer_msg->peer.hashPubKey);
6373 send_destroy_path (t, peer_info->id);
6374 tunnel_delete_peer (t, peer_info->id);
6375 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6380 * Handler for blacklist requests of peers in a tunnel
6382 * @param cls closure
6383 * @param client identification of the client
6384 * @param message the actual message (PeerControl)
6386 * FIXME implement DHT block bloomfilter
6389 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
6390 const struct GNUNET_MessageHeader *message)
6392 struct GNUNET_MESH_PeerControl *peer_msg;
6393 struct MeshClient *c;
6394 struct MeshTunnel *t;
6395 MESH_TunnelNumber tid;
6397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
6398 /* Sanity check for client registration */
6399 if (NULL == (c = client_get (client)))
6402 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6407 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6409 /* Sanity check for message size */
6410 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6413 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6417 /* Tunnel exists? */
6418 tid = ntohl (peer_msg->tunnel_id);
6419 t = tunnel_get_by_local_id (c, tid);
6423 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6428 GNUNET_array_append(t->blacklisted, t->nblacklisted,
6429 GNUNET_PEER_intern(&peer_msg->peer));
6434 * Handler for unblacklist requests of peers in a tunnel
6436 * @param cls closure
6437 * @param client identification of the client
6438 * @param message the actual message (PeerControl)
6441 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
6442 const struct GNUNET_MessageHeader *message)
6444 struct GNUNET_MESH_PeerControl *peer_msg;
6445 struct MeshClient *c;
6446 struct MeshTunnel *t;
6447 MESH_TunnelNumber tid;
6451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
6452 /* Sanity check for client registration */
6453 if (NULL == (c = client_get (client)))
6456 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6459 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6461 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
6463 /* Sanity check for message size */
6464 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
6467 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6471 /* Tunnel exists? */
6472 tid = ntohl (peer_msg->tunnel_id);
6473 t = tunnel_get_by_local_id (c, tid);
6477 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
6482 /* if peer is not known, complain */
6483 pid = GNUNET_PEER_search (&peer_msg->peer);
6490 /* search and remove from list */
6491 for (i = 0; i < t->nblacklisted; i++)
6493 if (t->blacklisted[i] == pid)
6495 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
6496 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
6501 /* if peer hasn't been blacklisted, complain */
6507 * Handler for connection requests to new peers by type
6509 * @param cls closure
6510 * @param client identification of the client
6511 * @param message the actual message (ConnectPeerByType)
6514 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
6515 const struct GNUNET_MessageHeader *message)
6517 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
6518 struct MeshClient *c;
6519 struct MeshTunnel *t;
6520 struct GNUNET_HashCode hash;
6521 MESH_TunnelNumber tid;
6523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
6524 /* Sanity check for client registration */
6525 if (NULL == (c = client_get (client)))
6528 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6533 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
6535 /* Sanity check for message size */
6536 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
6537 ntohs (connect_msg->header.size))
6540 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6544 /* Tunnel exists? */
6545 tid = ntohl (connect_msg->tunnel_id);
6546 t = tunnel_get_by_local_id (c, tid);
6550 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6554 /* Does client own tunnel? */
6555 if (t->owner->handle != client)
6558 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6562 /* Do WE have the service? */
6563 t->type = ntohl (connect_msg->type);
6564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
6565 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
6566 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
6569 /* Yes! Fast forward, add ourselves to the tunnel and send the
6570 * good news to the client, and alert the destination client of
6571 * an incoming tunnel.
6573 * FIXME send a path create to self, avoid code duplication
6575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
6576 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
6577 peer_info_get (&my_full_id),
6578 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
6581 send_client_peer_connected (t, myid);
6582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
6583 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6585 t->local_tid_dest = next_local_tid++;
6586 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
6587 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
6588 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6592 /* Ok, lets find a peer offering the service */
6593 if (NULL != t->dht_get_type)
6595 GNUNET_DHT_get_stop (t->dht_get_type);
6597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
6598 GNUNET_h2s (&hash));
6600 GNUNET_DHT_get_start (dht_handle,
6601 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
6603 dht_replication_level,
6604 GNUNET_DHT_RO_RECORD_ROUTE |
6605 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6607 &dht_get_type_handler, t);
6609 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6615 * Handler for connection requests to new peers by a string service description.
6617 * @param cls closure
6618 * @param client identification of the client
6619 * @param message the actual message, which includes messages the client wants
6622 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
6623 const struct GNUNET_MessageHeader *message)
6625 struct GNUNET_MESH_ConnectPeerByString *msg;
6626 struct MeshRegexSearchContext *ctx;
6627 struct MeshRegexSearchInfo *info;
6628 struct GNUNET_DHT_GetHandle *get_h;
6629 struct GNUNET_HashCode key;
6630 struct MeshTunnel *t;
6631 struct MeshClient *c;
6632 MESH_TunnelNumber tid;
6636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6637 "Connect by string started\n");
6638 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
6639 size = htons (message->size);
6641 /* Sanity check for client registration */
6642 if (NULL == (c = client_get (client)))
6645 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6650 /* Message size sanity check */
6651 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
6654 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6658 /* Tunnel exists? */
6659 tid = ntohl (msg->tunnel_id);
6660 t = tunnel_get_by_local_id (c, tid);
6664 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6668 /* Does client own tunnel? */
6669 if (t->owner->handle != client)
6672 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6677 " on tunnel %s [%u]\n",
6678 GNUNET_i2s(&my_full_id),
6681 /* Only one connect_by_string allowed at the same time! */
6682 /* FIXME: allow more, return handle at api level to cancel, document */
6683 if (NULL != t->regex_ctx)
6686 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6690 /* Find string itself */
6691 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
6692 string = (const char *) &msg[1];
6694 /* Initialize context */
6695 size = GNUNET_REGEX_get_first_key(string, len, &key);
6696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6697 " consumed %u bits out of %u\n", size, len);
6698 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6699 " looking for %s\n", GNUNET_h2s (&key));
6701 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
6703 info->description = GNUNET_malloc (len + 1);
6704 memcpy (info->description, string, len);
6705 info->description[len] = '\0';
6706 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32);
6707 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32);
6708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
6710 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
6711 ctx->position = size;
6715 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
6717 /* Start search in DHT */
6718 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
6719 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
6720 &key, /* key to search */
6721 dht_replication_level, /* replication level */
6722 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
6723 NULL, /* xquery */ // FIXME BLOOMFILTER
6724 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
6725 &dht_get_string_handler, ctx);
6727 GNUNET_break (GNUNET_OK ==
6728 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
6731 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
6733 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6734 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
6739 * Handler for client traffic directed to one peer
6741 * @param cls closure
6742 * @param client identification of the client
6743 * @param message the actual message
6746 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
6747 const struct GNUNET_MessageHeader *message)
6749 struct MeshClient *c;
6750 struct MeshTunnel *t;
6751 struct MeshPeerInfo *pi;
6752 struct GNUNET_MESH_Unicast *data_msg;
6753 MESH_TunnelNumber tid;
6756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6757 "Got a unicast request from a client!\n");
6759 /* Sanity check for client registration */
6760 if (NULL == (c = client_get (client)))
6763 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6768 data_msg = (struct GNUNET_MESH_Unicast *) message;
6770 /* Sanity check for message size */
6771 size = ntohs (message->size);
6772 if (sizeof (struct GNUNET_MESH_Unicast) +
6773 sizeof (struct GNUNET_MessageHeader) > size)
6776 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6780 /* Tunnel exists? */
6781 tid = ntohl (data_msg->tid);
6782 t = tunnel_get_by_local_id (c, tid);
6786 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6790 /* Is it a local tunnel? Then, does client own the tunnel? */
6791 if (t->owner->handle != client)
6794 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6798 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
6799 &data_msg->destination.hashPubKey);
6800 /* Is the selected peer in the tunnel? */
6804 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6808 /* PID should be as expected */
6809 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
6812 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6813 "Unicast PID, expected %u, got %u\n",
6814 t->fwd_pid + 1, ntohl (data_msg->pid));
6815 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6819 /* Ok, everything is correct, send the message
6820 * (pretend we got it from a mesh peer)
6823 /* Work around const limitation */
6824 char buf[ntohs (message->size)] GNUNET_ALIGN;
6825 struct GNUNET_MESH_Unicast *copy;
6827 copy = (struct GNUNET_MESH_Unicast *) buf;
6828 memcpy (buf, data_msg, size);
6829 copy->oid = my_full_id;
6830 copy->tid = htonl (t->id.tid);
6831 copy->ttl = htonl (default_ttl);
6832 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6833 " calling generic handler...\n");
6834 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
6836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
6837 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6844 * Handler for client traffic directed to the origin
6846 * @param cls closure
6847 * @param client identification of the client
6848 * @param message the actual message
6851 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
6852 const struct GNUNET_MessageHeader *message)
6854 struct GNUNET_MESH_ToOrigin *data_msg;
6855 struct MeshTunnelClientInfo *clinfo;
6856 struct MeshClient *c;
6857 struct MeshTunnel *t;
6858 MESH_TunnelNumber tid;
6861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6862 "Got a ToOrigin request from a client!\n");
6863 /* Sanity check for client registration */
6864 if (NULL == (c = client_get (client)))
6867 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6872 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
6874 /* Sanity check for message size */
6875 size = ntohs (message->size);
6876 if (sizeof (struct GNUNET_MESH_ToOrigin) +
6877 sizeof (struct GNUNET_MessageHeader) > size)
6880 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6884 /* Tunnel exists? */
6885 tid = ntohl (data_msg->tid);
6886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
6887 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
6890 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6893 t = tunnel_get_by_local_id (c, tid);
6897 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6901 /* It should be sent by someone who has this as incoming tunnel. */
6902 if (GNUNET_NO == client_knows_tunnel (c, t))
6905 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6909 /* PID should be as expected */
6910 clinfo = tunnel_get_client_fc (t, c);
6911 if (ntohl (data_msg->pid) != clinfo->bck_pid + 1)
6914 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6915 "To Origin PID, expected %u, got %u\n",
6916 clinfo->bck_pid + 1,
6917 ntohl (data_msg->pid));
6918 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6922 /* Ok, everything is correct, send the message
6923 * (pretend we got it from a mesh peer)
6927 char buf[ntohs (message->size)] GNUNET_ALIGN;
6928 struct GNUNET_MESH_ToOrigin *copy;
6930 /* Work around const limitation */
6931 copy = (struct GNUNET_MESH_ToOrigin *) buf;
6932 memcpy (buf, data_msg, size);
6933 GNUNET_PEER_resolve (t->id.oid, ©->oid);
6934 copy->tid = htonl (t->id.tid);
6935 copy->ttl = htonl (default_ttl);
6936 if (ntohl (copy->pid) != (t->bck_pid + 1))
6939 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
6940 "To Origin PID, expected %u, got %u\n",
6946 copy->sender = my_full_id;
6947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6948 " calling generic handler...\n");
6949 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
6951 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6958 * Handler for client traffic directed to all peers in a tunnel
6960 * @param cls closure
6961 * @param client identification of the client
6962 * @param message the actual message
6965 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
6966 const struct GNUNET_MessageHeader *message)
6968 struct MeshClient *c;
6969 struct MeshTunnel *t;
6970 struct GNUNET_MESH_Multicast *data_msg;
6971 MESH_TunnelNumber tid;
6973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6974 "Got a multicast request from a client!\n");
6976 /* Sanity check for client registration */
6977 if (NULL == (c = client_get (client)))
6980 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6985 data_msg = (struct GNUNET_MESH_Multicast *) message;
6987 /* Sanity check for message size */
6988 if (sizeof (struct GNUNET_MESH_Multicast) +
6989 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
6992 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6996 /* Tunnel exists? */
6997 tid = ntohl (data_msg->tid);
6998 t = tunnel_get_by_local_id (c, tid);
7002 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7006 /* Does client own tunnel? */
7007 if (t->owner->handle != client)
7010 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7014 /* PID should be as expected */
7015 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7018 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7019 "Multicast PID, expected %u, got %u\n",
7020 t->fwd_pid + 1, ntohl (data_msg->pid));
7021 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7026 char buf[ntohs (message->size)] GNUNET_ALIGN;
7027 struct GNUNET_MESH_Multicast *copy;
7029 copy = (struct GNUNET_MESH_Multicast *) buf;
7030 memcpy (buf, message, ntohs (message->size));
7031 copy->oid = my_full_id;
7032 copy->tid = htonl (t->id.tid);
7033 copy->ttl = htonl (default_ttl);
7034 GNUNET_assert (ntohl (copy->pid) == (t->fwd_pid + 1));
7035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7036 " calling generic handler...\n");
7037 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
7040 /* receive done gets called when last copy is sent to a neighbor */
7046 * Handler for client's ACKs for payload traffic.
7048 * @param cls Closure (unused).
7049 * @param client Identification of the client.
7050 * @param message The actual message.
7053 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
7054 const struct GNUNET_MessageHeader *message)
7056 struct GNUNET_MESH_LocalAck *msg;
7057 struct MeshTunnel *t;
7058 struct MeshClient *c;
7059 MESH_TunnelNumber tid;
7062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
7063 /* Sanity check for client registration */
7064 if (NULL == (c = client_get (client)))
7067 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7072 msg = (struct GNUNET_MESH_LocalAck *) message;
7074 /* Tunnel exists? */
7075 tid = ntohl (msg->tunnel_id);
7076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7077 t = tunnel_get_by_local_id (c, tid);
7080 GNUNET_break (0); // FIXME fc
7081 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7085 ack = ntohl (msg->max_pid);
7086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
7088 /* Does client own tunnel? I.E: Is this and ACK for BCK traffic? */
7089 if (NULL != t->owner && t->owner->handle == client)
7091 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
7093 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7097 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
7098 tunnel_set_client_fwd_ack (t, c, ack);
7099 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
7102 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7108 * Functions to handle messages from clients
7110 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
7111 {&handle_local_new_client, NULL,
7112 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
7113 {&handle_local_announce_regex, NULL,
7114 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
7115 {&handle_local_tunnel_create, NULL,
7116 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
7117 sizeof (struct GNUNET_MESH_TunnelMessage)},
7118 {&handle_local_tunnel_destroy, NULL,
7119 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
7120 sizeof (struct GNUNET_MESH_TunnelMessage)},
7121 {&handle_local_tunnel_speed, NULL,
7122 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
7123 sizeof (struct GNUNET_MESH_TunnelMessage)},
7124 {&handle_local_tunnel_speed, NULL,
7125 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
7126 sizeof (struct GNUNET_MESH_TunnelMessage)},
7127 {&handle_local_tunnel_buffer, NULL,
7128 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
7129 sizeof (struct GNUNET_MESH_TunnelMessage)},
7130 {&handle_local_tunnel_buffer, NULL,
7131 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
7132 sizeof (struct GNUNET_MESH_TunnelMessage)},
7133 {&handle_local_connect_add, NULL,
7134 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
7135 sizeof (struct GNUNET_MESH_PeerControl)},
7136 {&handle_local_connect_del, NULL,
7137 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
7138 sizeof (struct GNUNET_MESH_PeerControl)},
7139 {&handle_local_blacklist, NULL,
7140 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
7141 sizeof (struct GNUNET_MESH_PeerControl)},
7142 {&handle_local_unblacklist, NULL,
7143 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
7144 sizeof (struct GNUNET_MESH_PeerControl)},
7145 {&handle_local_connect_by_type, NULL,
7146 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
7147 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
7148 {&handle_local_connect_by_string, NULL,
7149 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
7150 {&handle_local_unicast, NULL,
7151 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
7152 {&handle_local_to_origin, NULL,
7153 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
7154 {&handle_local_multicast, NULL,
7155 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
7156 {&handle_local_ack, NULL,
7157 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
7158 sizeof (struct GNUNET_MESH_LocalAck)},
7164 * To be called on core init/fail.
7166 * @param cls service closure
7167 * @param server handle to the server for this service
7168 * @param identity the public identity of this peer
7171 core_init (void *cls, struct GNUNET_CORE_Handle *server,
7172 const struct GNUNET_PeerIdentity *identity)
7175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
7176 core_handle = server;
7177 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
7180 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
7181 GNUNET_SCHEDULER_shutdown (); // Try gracefully
7183 GNUNET_abort(); // Try harder
7190 * Method called whenever a given peer connects.
7192 * @param cls closure
7193 * @param peer peer identity this notification is about
7194 * @param atsi performance data for the connection
7195 * @param atsi_count number of records in 'atsi'
7198 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
7199 const struct GNUNET_ATS_Information *atsi,
7200 unsigned int atsi_count)
7202 struct MeshPeerInfo *peer_info;
7203 struct MeshPeerPath *path;
7205 DEBUG_CONN ("Peer connected\n");
7206 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
7207 peer_info = peer_info_get (peer);
7208 if (myid == peer_info->id)
7210 DEBUG_CONN (" (self)\n");
7215 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
7217 path = path_new (2);
7218 path->peers[0] = myid;
7219 path->peers[1] = peer_info->id;
7220 GNUNET_PEER_change_rc (myid, 1);
7221 GNUNET_PEER_change_rc (peer_info->id, 1);
7222 peer_info_add_path (peer_info, path, GNUNET_YES);
7223 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
7229 * Method called whenever a peer disconnects.
7231 * @param cls closure
7232 * @param peer peer identity this notification is about
7235 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
7237 struct MeshPeerInfo *pi;
7238 struct MeshPeerQueue *q;
7239 struct MeshPeerQueue *n;
7241 DEBUG_CONN ("Peer disconnected\n");
7242 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
7254 /* try to reroute this traffic instead */
7255 queue_destroy(q, GNUNET_YES);
7259 peer_info_remove_path (pi, pi->id, myid);
7262 DEBUG_CONN (" (self)\n");
7264 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
7269 /******************************************************************************/
7270 /************************ MAIN FUNCTIONS ****************************/
7271 /******************************************************************************/
7274 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
7276 * @param cls closure
7277 * @param key current key code
7278 * @param value value in the hash map
7279 * @return GNUNET_YES if we should continue to iterate,
7283 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
7285 struct MeshTunnel *t = value;
7292 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
7294 * @param cls closure
7295 * @param key current key code
7296 * @param value value in the hash map
7297 * @return GNUNET_YES if we should continue to iterate,
7301 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
7303 struct MeshPeerInfo *p = value;
7304 struct MeshPeerQueue *q;
7305 struct MeshPeerQueue *n;
7313 queue_destroy(q, GNUNET_YES);
7317 peer_info_destroy (p);
7322 * Task run during shutdown.
7328 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
7330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
7332 if (core_handle != NULL)
7334 GNUNET_CORE_disconnect (core_handle);
7337 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
7338 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
7339 if (dht_handle != NULL)
7341 GNUNET_DHT_disconnect (dht_handle);
7346 GNUNET_SERVER_notification_context_destroy (nc);
7349 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
7351 GNUNET_SCHEDULER_cancel (announce_id_task);
7352 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
7354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
7358 * Process mesh requests.
7360 * @param cls closure
7361 * @param server the initialized server
7362 * @param c configuration to use
7365 run (void *cls, struct GNUNET_SERVER_Handle *server,
7366 const struct GNUNET_CONFIGURATION_Handle *c)
7368 struct MeshPeerInfo *peer;
7369 struct MeshPeerPath *p;
7372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
7373 server_handle = server;
7374 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
7375 NULL, /* Closure passed to MESH functions */
7376 &core_init, /* Call core_init once connected */
7377 &core_connect, /* Handle connects */
7378 &core_disconnect, /* remove peers on disconnects */
7379 NULL, /* Don't notify about all incoming messages */
7380 GNUNET_NO, /* For header only in notification */
7381 NULL, /* Don't notify about all outbound messages */
7382 GNUNET_NO, /* For header-only out notification */
7383 core_handlers); /* Register these handlers */
7385 if (core_handle == NULL)
7388 GNUNET_SCHEDULER_shutdown ();
7393 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
7396 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7398 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7400 GNUNET_SCHEDULER_shutdown ();
7405 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
7406 &refresh_path_time))
7408 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7410 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7411 "refresh path time");
7412 GNUNET_SCHEDULER_shutdown ();
7417 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
7418 &app_announce_time))
7420 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7422 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7423 "app announce time");
7424 GNUNET_SCHEDULER_shutdown ();
7429 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
7432 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7434 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7435 "id announce time");
7436 GNUNET_SCHEDULER_shutdown ();
7441 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "UNACKNOWLEDGED_WAIT",
7442 &unacknowledged_wait_time))
7444 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7446 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7447 "unacknowledged wait time");
7448 GNUNET_SCHEDULER_shutdown ();
7453 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
7456 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7458 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7460 GNUNET_SCHEDULER_shutdown ();
7465 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
7468 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7470 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7472 GNUNET_SCHEDULER_shutdown ();
7477 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
7480 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7482 ("Mesh service is lacking key configuration settings (%s). Exiting.\n"),
7484 GNUNET_SCHEDULER_shutdown ();
7489 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
7492 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7494 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
7500 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
7501 &dht_replication_level))
7503 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7505 ("Mesh service is lacking key configuration settings (%s). Using default (%u).\n"),
7506 "dht replication level", 10);
7507 dht_replication_level = 10;
7511 my_private_key = GNUNET_CRYPTO_rsa_key_create_from_file (keyfile);
7512 GNUNET_free (keyfile);
7513 if (my_private_key == NULL)
7515 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7516 _("Mesh service could not access hostkey. Exiting.\n"));
7517 GNUNET_SCHEDULER_shutdown ();
7520 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
7521 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
7522 &my_full_id.hashPubKey);
7523 myid = GNUNET_PEER_intern (&my_full_id);
7525 // transport_handle = GNUNET_TRANSPORT_connect(c,
7532 dht_handle = GNUNET_DHT_connect (c, 64);
7533 if (dht_handle == NULL)
7538 stats = GNUNET_STATISTICS_create ("mesh", c);
7542 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
7544 tunnels = GNUNET_CONTAINER_multihashmap_create (32);
7545 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32);
7546 peers = GNUNET_CONTAINER_multihashmap_create (32);
7547 applications = GNUNET_CONTAINER_multihashmap_create (32);
7548 types = GNUNET_CONTAINER_multihashmap_create (32);
7550 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
7551 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
7552 GNUNET_SERVER_disconnect_notify (server_handle,
7553 &handle_local_client_disconnect, NULL);
7557 clients_tail = NULL;
7560 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
7561 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
7563 /* Create a peer_info for the local peer */
7564 peer = peer_info_get (&my_full_id);
7567 GNUNET_PEER_change_rc (myid, 1);
7568 peer_info_add_path (peer, p, GNUNET_YES);
7570 /* Scheduled the task to clean up when shutdown is called */
7571 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
7574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "end of run()\n");
7578 * The main function for the mesh service.
7580 * @param argc number of arguments from the command line
7581 * @param argv command line arguments
7582 * @return 0 ok, 1 on error
7585 main (int argc, char *const *argv)
7589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
7592 GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
7594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");