2 This file is part of GNUnet.
3 (C) 2001-2012 Christian Grothoff (and other contributing authors)
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6 it under the terms of the GNU General Public License as published
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13 General Public License for more details.
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
41 * - relay corking down to core
42 * - set ttl relative to tree depth
43 * - Add data ACK count in path ACK
44 * - Make common GNUNET_MESH_Data header for unicast, to_orig, multicast
50 #include "mesh_protocol.h"
51 #include "mesh_tunnel_tree.h"
52 #include "block_mesh.h"
53 #include "mesh_block_lib.h"
54 #include "gnunet_dht_service.h"
55 #include "gnunet_statistics_service.h"
56 #include "gnunet_regex_lib.h"
58 #define MESH_BLOOM_SIZE 128
60 #define MESH_DEBUG_DHT GNUNET_NO
61 #define MESH_DEBUG_CONNECTION GNUNET_NO
62 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
64 #define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\
65 GNUNET_TIME_UNIT_MINUTES,\
68 #if MESH_DEBUG_CONNECTION
69 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
71 #define DEBUG_CONN(...)
75 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
77 #define DEBUG_DHT(...)
84 struct timespec __mesh_start;
85 struct timespec __mesh_end;
86 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
87 #define INTERVAL_END \
89 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
90 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
91 if (__diff < 0) __diff += 1000000000;\
95 #define INTERVAL_SHOW \
97 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
99 #define INTERVAL_START
101 #define INTERVAL_SHOW
104 /******************************************************************************/
105 /************************ DATA STRUCTURES ****************************/
106 /******************************************************************************/
108 /** FWD declaration */
114 * Struct representing a piece of data being sent to other peers
118 /** Tunnel it belongs to. */
119 struct MeshTunnel *t;
121 /** How many remaining neighbors still hav't got it. */
122 unsigned int reference_counter;
124 /** How many remaining neighbors we need to send this to. */
125 unsigned int total_out;
127 /** Size of the data. */
136 * Struct containing info about a queued transmission to this peer
143 struct MeshPeerQueue *next;
148 struct MeshPeerQueue *prev;
151 * Peer this transmission is directed to.
153 struct MeshPeerInfo *peer;
156 * Tunnel this message belongs to.
158 struct MeshTunnel *tunnel;
161 * Pointer to info stucture used as cls.
171 * Size of the message
178 * Struct to store regex information announced by clients.
180 struct MeshRegexDescriptor
183 * Regular expression itself.
188 * Cached DFA for regular expression 'regex'.
190 struct GNUNET_REGEX_Automaton *dfa;
193 * How many characters per edge can we squeeze?
195 uint16_t compression;
199 * Struct containing all info possibly needed to build a package when called
202 struct MeshTransmissionDescriptor
204 /** ID of the tunnel this packet travels in */
205 struct MESH_TunnelID *origin;
207 /** Who was this message being sent to */
208 struct MeshPeerInfo *peer;
210 /** Ultimate destination of the packet */
211 GNUNET_PEER_Id destination;
213 /** Data descriptor */
214 struct MeshData* mesh_data;
219 * Struct containing all information regarding a given peer
229 * Last time we heard from this peer
231 struct GNUNET_TIME_Absolute last_contact;
234 * Task handler for delayed connect task;
236 GNUNET_SCHEDULER_TaskIdentifier connect_task;
239 * Number of attempts to reconnect so far
241 int n_reconnect_attempts;
244 * Paths to reach the peer, ordered by ascending hop count
246 struct MeshPeerPath *path_head;
249 * Paths to reach the peer, ordered by ascending hop count
251 struct MeshPeerPath *path_tail;
254 * Handle to stop the DHT search for a path to this peer
256 struct GNUNET_DHT_GetHandle *dhtget;
259 * Closure given to the DHT GET
261 struct MeshPathInfo *dhtgetcls;
264 * Array of tunnels this peer participates in
265 * (most probably a small amount, therefore not a hashmap)
266 * When the path to the peer changes, notify these tunnels to let them
267 * re-adjust their path trees.
269 struct MeshTunnel **tunnels;
272 * Number of tunnels this peers participates in
274 unsigned int ntunnels;
277 * Transmission queue to core DLL head
279 struct MeshPeerQueue *queue_head;
282 * Transmission queue to core DLL tail
284 struct MeshPeerQueue *queue_tail;
287 * How many messages are in the queue to this peer.
289 unsigned int queue_n;
292 * Handle to for queued transmissions
294 struct GNUNET_CORE_TransmitHandle *core_transmit;
299 * Globally unique tunnel identification (owner + number)
300 * DO NOT USE OVER THE NETWORK
305 * Node that owns the tunnel
310 * Tunnel number to differentiate all the tunnels owned by the node oid
311 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
313 MESH_TunnelNumber tid;
318 * Struct containing all information regarding a tunnel
319 * For an intermediate node the improtant info used will be:
320 * - id Tunnel unique identification
321 * - paths[0] To know where to send it next
322 * - metainfo: ready, speeds, accounting
329 struct MESH_TunnelID id;
332 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
334 MESH_TunnelNumber local_tid;
337 * Local tunnel number for local destination clients (incoming number)
338 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
341 MESH_TunnelNumber local_tid_dest;
344 * Is the speed on the tunnel limited to the slowest peer?
349 * Is the tunnel bufferless (minimum latency)?
354 * Packet ID of the last fwd packet seen (sent/retransmitted/received).
359 * Packet ID of the last bck packet sent (unique counter per hop).
364 * SKIP value for this tunnel.
369 * Force sending ACK? Flag to allow duplicate ACK on POLL.
374 * MeshTunnelChildInfo of all children, indexed by GNUNET_PEER_Id.
375 * Contains the Flow Control info: FWD ACK value received,
376 * last BCK ACK sent, PID and SKIP values.
378 struct GNUNET_CONTAINER_MultiHashMap *children_fc;
381 * Last ACK sent towards the origin (for traffic towards leaf node).
383 uint32_t last_fwd_ack;
386 * BCK ACK value received from the hop towards the owner of the tunnel,
387 * (previous node / owner): up to what message PID can we sent back to him.
392 * How many messages are in the forward queue (towards leaves).
394 unsigned int fwd_queue_n;
397 * How many messages do we accept in the forward queue.
399 unsigned int fwd_queue_max;
402 * How many messages are in the backward queue (towards origin).
404 unsigned int bck_queue_n;
407 * How many messages do we accept in the backward queue.
409 unsigned int bck_queue_max;
412 * Task to poll peer in case of a stall.
414 GNUNET_SCHEDULER_TaskIdentifier fc_poll_bck;
417 * Last time the tunnel was used
419 struct GNUNET_TIME_Absolute timestamp;
422 * Peers in the tunnel, indexed by PeerIdentity -> (MeshPeerInfo)
423 * containing peers added by id or by type, not intermediate peers.
425 struct GNUNET_CONTAINER_MultiHashMap *peers;
428 * Number of peers that are connected and potentially ready to receive data
430 unsigned int peers_ready;
433 * Number of peers that have been added to the tunnel
435 unsigned int peers_total;
438 * Client owner of the tunnel, if any
440 struct MeshClient *owner;
443 * Clients that have been informed about and want to stay in the tunnel.
445 struct MeshClient **clients;
448 * Flow control info for each client.
450 struct MeshTunnelClientInfo *clients_fc;
453 * Number of elements in clients/clients_fc
455 unsigned int nclients;
458 * Clients that have been informed but requested to leave the tunnel.
460 struct MeshClient **ignore;
463 * Number of elements in clients
465 unsigned int nignore;
470 GNUNET_PEER_Id *blacklisted;
473 * Number of elements in blacklisted
475 unsigned int nblacklisted;
478 * Bloomfilter (for peer identities) to stop circular routes
480 char bloomfilter[MESH_BLOOM_SIZE];
485 struct MeshTunnelTree *tree;
488 * Application type we are looking for in this tunnel
490 GNUNET_MESH_ApplicationType type;
493 * Used to search peers offering a service
495 struct GNUNET_DHT_GetHandle *dht_get_type;
498 * Initial context of the regex search for a connect_by_string
500 struct MeshRegexSearchContext *regex_ctx;
503 * Task to keep the used paths alive
505 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
508 * Task to destroy the tunnel after timeout
510 * FIXME: merge the two? a tunnel will have either
511 * a path refresh OR a timeout, never both!
513 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
516 * Flag to signal the destruction of the tunnel.
517 * If this is set GNUNET_YES the tunnel will be destroyed
518 * when the queue is empty.
523 * Total messages pending for this tunnels, payload or not.
525 unsigned int pending_messages;
528 * If the tunnel is empty, destoy it.
530 GNUNET_SCHEDULER_TaskIdentifier delayed_destroy;
535 * Info about a child node in a tunnel, needed to perform flow control.
537 struct MeshTunnelChildInfo
540 * ID of the child node.
560 * Maximum PID allowed (FWD ACK received).
565 * Last ACK sent to that child (BCK ACK).
570 * Circular buffer pointing to MeshPeerQueue elements for all
571 * payload traffic going to this child.
572 * Size determined by the tunnel queue size (@c t->fwd_queue_max).
574 struct MeshPeerQueue **send_buffer;
577 * Index of the oldest element in the send_buffer.
579 unsigned int send_buffer_start;
582 * How many elements are already in the buffer.
584 unsigned int send_buffer_n;
587 * Tunnel this info is about
589 struct MeshTunnel *t;
592 * Task to poll peer in case of a stall.
594 GNUNET_SCHEDULER_TaskIdentifier fc_poll;
597 * Time to use for next polling call.
599 struct GNUNET_TIME_Relative fc_poll_time;
604 * Info about a leaf client of a tunnel, needed to perform flow control.
606 struct MeshTunnelClientInfo
609 * PID of the last packet sent to the client (FWD).
614 * PID of the last packet received from the client (BCK).
619 * Maximum PID allowed (FWD ACK received).
624 * Last ACK sent to that child (BCK ACK).
632 * Info collected during iteration of child nodes in order to get the ACK value
635 struct MeshTunnelChildIteratorContext
638 * Tunnel whose info is being collected.
640 struct MeshTunnel *t;
643 * Is this context initialized? Is the value in max_child_ack valid?
648 * Maximum child ACK so far.
650 uint32_t max_child_ack;
653 * Number of children nodes
655 unsigned int nchildren;
660 * Info needed to work with tunnel paths and peers
667 struct MeshTunnel *t;
670 * Neighbouring peer to whom we send the packet to
672 struct MeshPeerInfo *peer;
677 struct MeshPeerPath *path;
682 * Struct containing information about a client of the service
689 struct MeshClient *next;
694 struct MeshClient *prev;
697 * Tunnels that belong to this client, indexed by local id
699 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
702 * Tunnels this client has accepted, indexed by incoming local id
704 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
707 * Tunnels this client has rejected, indexed by incoming local id
709 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
711 * Handle to communicate with the client
713 struct GNUNET_SERVER_Client *handle;
716 * Applications that this client has claimed to provide
718 struct GNUNET_CONTAINER_MultiHashMap *apps;
721 * Messages that this client has declared interest in
723 struct GNUNET_CONTAINER_MultiHashMap *types;
726 * Whether the client is active or shutting down (don't send confirmations
727 * to a client that is shutting down.
732 * ID of the client, mainly for debug messages
737 * Regular expressions describing the services offered by this client.
739 struct MeshRegexDescriptor *regexes; // FIXME regex add timeout? API to remove a regex?
742 * Number of regular expressions in regexes.
744 unsigned int n_regex;
747 * Task to refresh all regular expresions in the DHT.
749 GNUNET_SCHEDULER_TaskIdentifier regex_announce_task;
752 * Tmp store for partially retrieved regex.
760 * Struct to keep information of searches of services described by a regex
761 * using a user-provided string service description.
763 struct MeshRegexSearchInfo
766 * Which tunnel is this for
768 struct MeshTunnel *t;
771 * User provided description of the searched service.
776 * Part of the description already consumed by the search.
783 struct GNUNET_CONTAINER_MultiHashMap *dht_get_handles;
786 * Results from running DHT GETs.
788 struct GNUNET_CONTAINER_MultiHashMap *dht_get_results;
791 * Contexts, for each running DHT GET. Free all on end of search.
793 struct MeshRegexSearchContext **contexts;
796 * Number of contexts (branches/steps in search).
798 unsigned int n_contexts;
801 * Peer that is connecting via connect_by_string. When connected, free ctx.
806 * Other peers that are found but not yet being connected to.
808 GNUNET_PEER_Id *peers;
811 * Number of elements in peers.
813 unsigned int n_peers;
816 * Next peer to try to connect to.
821 * Timeout for a connect attempt.
822 * When reached, try to connect to a different peer, if any. If not,
823 * try the same peer again.
825 GNUNET_SCHEDULER_TaskIdentifier timeout;
830 * Struct to keep state of running searches that have consumed a part of
833 struct MeshRegexSearchContext
836 * Part of the description already consumed by
837 * this particular search branch.
842 * Information about the search.
844 struct MeshRegexSearchInfo *info;
847 * We just want to look for one edge, the longer the better.
850 unsigned int longest_match;
853 * Destination hash of the longest match.
855 struct GNUNET_HashCode hash;
858 /******************************************************************************/
859 /************************ DEBUG FUNCTIONS ****************************/
860 /******************************************************************************/
864 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
865 * @param cls string to print
866 * @param success GNUNET_OK if the PUT was transmitted,
867 * GNUNET_NO on timeout,
868 * GNUNET_SYSERR on disconnect from service
869 * after the PUT message was transmitted
870 * (so we don't know if it was received or not)
875 mesh_debug (void *cls, int success)
879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
883 unsigned int debug_fwd_ack;
884 unsigned int debug_bck_ack;
888 /******************************************************************************/
889 /*********************** GLOBAL VARIABLES ****************************/
890 /******************************************************************************/
892 /************************** Configuration parameters **************************/
895 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
897 static struct GNUNET_TIME_Relative refresh_path_time;
900 * How often to PUT local application numbers in the DHT.
902 static struct GNUNET_TIME_Relative app_announce_time;
905 * How often to PUT own ID in the DHT.
907 static struct GNUNET_TIME_Relative id_announce_time;
910 * Maximum time allowed to connect to a peer found by string.
912 static struct GNUNET_TIME_Relative connect_timeout;
915 * Default TTL for payload packets.
917 static unsigned long long default_ttl;
920 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
922 static unsigned long long dht_replication_level;
925 * How many tunnels are we willing to maintain.
926 * Local tunnels are always allowed, even if there are more tunnels than max.
928 static unsigned long long max_tunnels;
931 * How many messages *in total* are we willing to queue, divided by number of
932 * tunnels to get tunnel queue size.
934 static unsigned long long max_msgs_queue;
937 * How many peers do we want to remember?
939 static unsigned long long max_peers;
942 /*************************** Static global variables **************************/
945 * Hostkey generation context
947 static struct GNUNET_CRYPTO_RsaKeyGenerationContext *keygen;
950 * DLL with all the clients, head.
952 static struct MeshClient *clients;
955 * DLL with all the clients, tail.
957 static struct MeshClient *clients_tail;
960 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
962 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
965 * Number of tunnels known.
967 static unsigned long long n_tunnels;
970 * Tunnels incoming, indexed by MESH_TunnelNumber
971 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
973 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
976 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
978 static struct GNUNET_CONTAINER_MultiHashMap *peers;
981 * Handle to communicate with transport
983 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
986 * Handle to communicate with core.
988 static struct GNUNET_CORE_Handle *core_handle;
993 static struct GNUNET_DHT_Handle *dht_handle;
998 static struct GNUNET_SERVER_Handle *server_handle;
1001 * Handle to the statistics service.
1003 static struct GNUNET_STATISTICS_Handle *stats;
1006 * Notification context, to send messages to local clients.
1008 static struct GNUNET_SERVER_NotificationContext *nc;
1011 * Local peer own ID (memory efficient handle).
1013 static GNUNET_PEER_Id myid;
1016 * Local peer own ID (full value).
1018 static struct GNUNET_PeerIdentity my_full_id;
1023 static struct GNUNET_CRYPTO_RsaPrivateKey *my_private_key;
1028 static struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded my_public_key;
1031 * Tunnel ID for the next created tunnel (global tunnel number).
1033 static MESH_TunnelNumber next_tid;
1036 * Tunnel ID for the next incoming tunnel (local tunnel number).
1038 static MESH_TunnelNumber next_local_tid;
1041 * All application types provided by this peer.
1043 static struct GNUNET_CONTAINER_MultiHashMap *applications;
1046 * All message types clients of this peer are interested in.
1048 static struct GNUNET_CONTAINER_MultiHashMap *types;
1051 * Task to periodically announce provided applications.
1053 GNUNET_SCHEDULER_TaskIdentifier announce_applications_task;
1056 * Task to periodically announce itself in the network.
1058 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
1061 * Next ID to assign to a client.
1063 unsigned int next_client_id;
1066 /******************************************************************************/
1067 /*********************** DECLARATIONS **************************/
1068 /******************************************************************************/
1071 * Function to process paths received for a new peer addition. The recorded
1072 * paths form the initial tunnel, which can be optimized later.
1073 * Called on each result obtained for the DHT search.
1075 * @param cls closure
1076 * @param exp when will this value expire
1077 * @param key key of the result
1078 * @param type type of the result
1079 * @param size number of bytes in data
1080 * @param data pointer to the result data
1083 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1084 const struct GNUNET_HashCode * key,
1085 const struct GNUNET_PeerIdentity *get_path,
1086 unsigned int get_path_length,
1087 const struct GNUNET_PeerIdentity *put_path,
1088 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
1089 size_t size, const void *data);
1093 * Function to process DHT string to regex matching.
1094 * Called on each result obtained for the DHT search.
1096 * @param cls closure (search context)
1097 * @param exp when will this value expire
1098 * @param key key of the result
1099 * @param get_path path of the get request (not used)
1100 * @param get_path_length lenght of get_path (not used)
1101 * @param put_path path of the put request (not used)
1102 * @param put_path_length length of the put_path (not used)
1103 * @param type type of the result
1104 * @param size number of bytes in data
1105 * @param data pointer to the result data
1107 * TODO: re-issue the request after certain time? cancel after X results?
1110 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1111 const struct GNUNET_HashCode * key,
1112 const struct GNUNET_PeerIdentity *get_path,
1113 unsigned int get_path_length,
1114 const struct GNUNET_PeerIdentity *put_path,
1115 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
1116 size_t size, const void *data);
1120 * Function to process DHT string to regex matching.
1121 * Called on each result obtained for the DHT search.
1123 * @param cls closure (search context)
1124 * @param exp when will this value expire
1125 * @param key key of the result
1126 * @param get_path path of the get request (not used)
1127 * @param get_path_length lenght of get_path (not used)
1128 * @param put_path path of the put request (not used)
1129 * @param put_path_length length of the put_path (not used)
1130 * @param type type of the result
1131 * @param size number of bytes in data
1132 * @param data pointer to the result data
1135 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
1136 const struct GNUNET_HashCode * key,
1137 const struct GNUNET_PeerIdentity *get_path,
1138 unsigned int get_path_length,
1139 const struct GNUNET_PeerIdentity *put_path,
1140 unsigned int put_path_length,
1141 enum GNUNET_BLOCK_Type type,
1142 size_t size, const void *data);
1146 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1147 * and insert it in the appropiate structures if the peer is not known yet.
1149 * @param peer Short identity of the peer.
1151 * @return Existing or newly created peer info.
1153 static struct MeshPeerInfo *
1154 peer_info_get_short (const GNUNET_PEER_Id peer);
1158 * Try to establish a new connection to this peer.
1159 * Use the best path for the given tunnel.
1160 * If the peer doesn't have any path to it yet, try to get one.
1161 * If the peer already has some path, send a CREATE PATH towards it.
1163 * @param peer PeerInfo of the peer.
1164 * @param t Tunnel for which to create the path, if possible.
1167 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t);
1171 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
1172 * needed rescources.
1173 * If peer already exists, reevaluate shortest path and change if different.
1175 * @param t Tunnel we want to add a new peer to
1176 * @param peer PeerInfo of the peer being added
1180 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer);
1184 * Removes an explicit path from a tunnel, freeing all intermediate nodes
1185 * that are no longer needed, as well as nodes of no longer reachable peers.
1186 * The tunnel itself is also destoyed if results in a remote empty tunnel.
1188 * @param t Tunnel from which to remove the path.
1189 * @param peer Short id of the peer which should be removed.
1192 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer);
1196 * Search for a tunnel by global ID using full PeerIdentities.
1198 * @param oid owner of the tunnel.
1199 * @param tid global tunnel number.
1201 * @return tunnel handler, NULL if doesn't exist.
1203 static struct MeshTunnel *
1204 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
1208 * Delete an active client from the tunnel.
1214 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
1217 * Notify a tunnel that a connection has broken that affects at least
1218 * some of its peers.
1220 * @param t Tunnel affected.
1221 * @param p1 Peer that got disconnected from p2.
1222 * @param p2 Peer that got disconnected from p1.
1224 * @return Short ID of the peer disconnected (either p1 or p2).
1225 * 0 if the tunnel remained unaffected.
1227 static GNUNET_PEER_Id
1228 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1233 * Get the current ack value for a tunnel, for data going from root to leaves,
1234 * taking in account the tunnel mode and the status of all children and clients.
1238 * @return Maximum PID allowed.
1241 tunnel_get_fwd_ack (struct MeshTunnel *t);
1245 * Add a client to a tunnel, initializing all needed data structures.
1247 * @param t Tunnel to which add the client.
1248 * @param c Client which to add to the tunnel.
1251 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c);
1255 * Jump to the next edge, with the longest matching token.
1257 * @param block Block found in the DHT.
1258 * @param size Size of the block.
1259 * @param ctx Context of the search.
1261 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1264 regex_next_edge (const struct MeshRegexBlock *block,
1266 struct MeshRegexSearchContext *ctx);
1270 * Find a path to a peer that offers a regex servcie compatible
1271 * with a given string.
1273 * @param key The key of the accepting state.
1274 * @param ctx Context containing info about the string, tunnel, etc.
1277 regex_find_path (const struct GNUNET_HashCode *key,
1278 struct MeshRegexSearchContext *ctx);
1282 * @brief Queue and pass message to core when possible.
1284 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
1285 * and accounts for it. In case the queue is full, the message is dropped and
1288 * Otherwise, message is treated as internal and allowed to go regardless of
1291 * @param cls Closure (@c type dependant). It will be used by queue_send to
1292 * build the message to be sent if not already prebuilt.
1293 * @param type Type of the message, 0 for a raw message.
1294 * @param size Size of the message.
1295 * @param dst Neighbor to send message to.
1296 * @param t Tunnel this message belongs to.
1299 queue_add (void *cls, uint16_t type, size_t size,
1300 struct MeshPeerInfo *dst, struct MeshTunnel *t);
1304 * Free a transmission that was already queued with all resources
1305 * associated to the request.
1307 * @param queue Queue handler to cancel.
1308 * @param clear_cls Is it necessary to free associated cls?
1311 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1315 * @brief Get the next transmittable message from the queue.
1317 * This will be the head, except in the case of being a data packet
1318 * not allowed by the destination peer.
1320 * @param peer Destination peer.
1322 * @return The next viable MeshPeerQueue element to send to that peer.
1323 * NULL when there are no transmittable messages.
1325 struct MeshPeerQueue *
1326 queue_get_next (const struct MeshPeerInfo *peer);
1330 * Core callback to write a queued packet to core buffer
1332 * @param cls Closure (peer info).
1333 * @param size Number of bytes available in buf.
1334 * @param buf Where the to write the message.
1336 * @return number of bytes written to buf
1339 queue_send (void *cls, size_t size, void *buf);
1341 /******************************************************************************/
1342 /************************ ITERATORS ****************************/
1343 /******************************************************************************/
1346 * Iterator over found existing mesh regex blocks that match an ongoing search.
1348 * @param cls closure
1349 * @param key current key code
1350 * @param value value in the hash map
1351 * @return GNUNET_YES if we should continue to iterate,
1355 regex_result_iterator (void *cls,
1356 const struct GNUNET_HashCode * key,
1359 struct MeshRegexBlock *block = value;
1360 struct MeshRegexSearchContext *ctx = cls;
1362 if (GNUNET_YES == ntohl(block->accepting) &&
1363 ctx->position == strlen (ctx->info->description))
1365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Found accepting known block\n");
1366 regex_find_path (key, ctx);
1367 return GNUNET_YES; // We found an accept state!
1371 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* %u, %u, [%u]\n",
1372 ctx->position, strlen(ctx->info->description),
1373 ntohl(block->accepting));
1376 regex_next_edge(block, SIZE_MAX, ctx);
1378 GNUNET_STATISTICS_update (stats, "# regex mesh blocks iterated", 1, GNUNET_NO);
1385 * Iterator over edges in a regex block retrieved from the DHT.
1387 * @param cls Closure (context of the search).
1388 * @param token Token that follows to next state.
1389 * @param len Lenght of token.
1390 * @param key Hash of next state.
1392 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1395 regex_edge_iterator (void *cls,
1398 const struct GNUNET_HashCode *key)
1400 struct MeshRegexSearchContext *ctx = cls;
1401 struct MeshRegexSearchInfo *info = ctx->info;
1405 GNUNET_STATISTICS_update (stats, "# regex edges iterated", 1, GNUNET_NO);
1407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Start of regex edge iterator\n");
1408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* descr : %s\n", info->description);
1409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* posit : %u\n", ctx->position);
1410 current = &info->description[ctx->position];
1411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* currt : %s\n", current);
1412 current_len = strlen (info->description) - ctx->position;
1413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* ctlen : %u\n", current_len);
1414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* tklen : %u\n", len);
1415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* token : %.*s\n", len, token);
1416 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* nextk : %s\n", GNUNET_h2s(key));
1417 if (len > current_len)
1419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token too long, END\n");
1420 return GNUNET_YES; // Token too long, wont match
1422 if (0 != strncmp (current, token, len))
1424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token doesn't match, END\n");
1425 return GNUNET_YES; // Token doesn't match
1428 if (len > ctx->longest_match)
1430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token is longer, KEEP\n");
1431 ctx->longest_match = len;
1436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Token is not longer, IGNORE\n");
1439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* End of regex edge iterator\n");
1445 * Jump to the next edge, with the longest matching token.
1447 * @param block Block found in the DHT.
1448 * @param size Size of the block.
1449 * @param ctx Context of the search.
1451 * @return GNUNET_YES if should keep iterating, GNUNET_NO otherwise.
1454 regex_next_edge (const struct MeshRegexBlock *block,
1456 struct MeshRegexSearchContext *ctx)
1458 struct MeshRegexSearchContext *new_ctx;
1459 struct MeshRegexSearchInfo *info = ctx->info;
1460 struct GNUNET_DHT_GetHandle *get_h;
1464 /* Find the longest match for the current string position,
1465 * among tokens in the given block */
1466 ctx->longest_match = 0;
1467 result = GNUNET_MESH_regex_block_iterate (block, size,
1468 ®ex_edge_iterator, ctx);
1469 GNUNET_break (GNUNET_OK == result);
1471 /* Did anything match? */
1472 if (0 == ctx->longest_match)
1475 new_ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
1476 new_ctx->info = info;
1477 new_ctx->position = ctx->position + ctx->longest_match;
1478 GNUNET_array_append (info->contexts, info->n_contexts, new_ctx);
1480 /* Check whether we already have a DHT GET running for it */
1482 GNUNET_CONTAINER_multihashmap_contains(info->dht_get_handles, &ctx->hash))
1484 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* GET running, END\n");
1485 GNUNET_CONTAINER_multihashmap_get_multiple (info->dht_get_results,
1487 ®ex_result_iterator,
1489 // FIXME: "leaks" new_ctx? avoid keeping it around?
1490 return; // We are already looking for it
1493 GNUNET_STATISTICS_update (stats, "# regex nodes traversed", 1, GNUNET_NO);
1495 /* Start search in DHT */
1496 rest = &new_ctx->info->description[new_ctx->position];
1498 GNUNET_DHT_get_start (dht_handle, /* handle */
1499 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
1500 &ctx->hash, /* key to search */
1501 dht_replication_level, /* replication level */
1502 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1504 // FIXME add BLOOMFILTER to exclude filtered peers
1505 strlen(rest) + 1, /* xquery bits */
1506 // FIXME add BLOOMFILTER SIZE
1507 &dht_get_string_handler, new_ctx);
1509 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
1512 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1521 * Iterator over hash map entries to cancel DHT GET requests after a
1522 * successful connect_by_string.
1524 * @param cls Closure (unused).
1525 * @param key Current key code (unused).
1526 * @param value Value in the hash map (get handle).
1527 * @return GNUNET_YES if we should continue to iterate,
1531 regex_cancel_dht_get (void *cls,
1532 const struct GNUNET_HashCode * key,
1535 struct GNUNET_DHT_GetHandle *h = value;
1537 GNUNET_DHT_get_stop (h);
1543 * Iterator over hash map entries to free MeshRegexBlocks stored during the
1544 * search for connect_by_string.
1546 * @param cls Closure (unused).
1547 * @param key Current key code (unused).
1548 * @param value MeshRegexBlock in the hash map.
1549 * @return GNUNET_YES if we should continue to iterate,
1553 regex_free_result (void *cls,
1554 const struct GNUNET_HashCode * key,
1558 GNUNET_free (value);
1564 * Find a path to a peer that offers a regex servcie compatible
1565 * with a given string.
1567 * @param key The key of the accepting state.
1568 * @param ctx Context containing info about the string, tunnel, etc.
1571 regex_find_path (const struct GNUNET_HashCode *key,
1572 struct MeshRegexSearchContext *ctx)
1574 struct GNUNET_DHT_GetHandle *get_h;
1576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Found peer by service\n");
1577 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
1578 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT, /* type */
1579 key, /* key to search */
1580 dht_replication_level, /* replication level */
1581 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE/* |
1582 GNUNET_DHT_RO_RECORD_ROUTE*/,
1584 // FIXME add BLOOMFILTER to exclude filtered peers
1585 0, /* xquery bits */
1586 // FIXME add BLOOMFILTER SIZE
1587 &dht_get_string_accept_handler, ctx);
1588 GNUNET_break (GNUNET_OK ==
1589 GNUNET_CONTAINER_multihashmap_put(ctx->info->dht_get_handles,
1592 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
1597 * Function called if the connect attempt to a peer found via
1598 * connect_by_string times out. Try to connect to another peer, if any.
1599 * Otherwise try to reconnect to the same peer.
1601 * @param cls Closure (info about regex search).
1602 * @param tc TaskContext.
1605 regex_connect_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1607 struct MeshRegexSearchInfo *info = cls;
1608 struct MeshPeerInfo *peer_info;
1612 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout\n");
1613 info->timeout = GNUNET_SCHEDULER_NO_TASK;
1614 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " timed out: %u\n", old);
1622 if (0 < info->n_peers)
1624 // Select next peer, put current in that spot.
1625 id = info->peers[info->i_peer];
1626 info->peers[info->i_peer] = info->peer;
1627 info->i_peer = (info->i_peer + 1) % info->n_peers;
1631 // Try to connect to same peer again.
1634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " trying: %u\n", id);
1636 peer_info = peer_info_get_short(id);
1637 tunnel_add_peer (info->t, peer_info);
1639 tunnel_delete_peer (info->t, old);
1640 peer_info_connect (peer_info, info->t);
1641 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
1642 ®ex_connect_timeout,
1644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Regex connect timeout END\n");
1649 * Cancel an ongoing regex search in the DHT and free all resources.
1651 * @param ctx The search context.
1654 regex_cancel_search(struct MeshRegexSearchContext *ctx)
1656 struct MeshRegexSearchInfo *info = ctx->info;
1659 GNUNET_free (info->description);
1660 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_handles,
1661 ®ex_cancel_dht_get, NULL);
1662 GNUNET_CONTAINER_multihashmap_iterate (info->dht_get_results,
1663 ®ex_free_result, NULL);
1664 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_results);
1665 GNUNET_CONTAINER_multihashmap_destroy (info->dht_get_handles);
1666 info->t->regex_ctx = NULL;
1667 for (i = 0; i < info->n_contexts; i++)
1669 GNUNET_free (info->contexts[i]);
1671 if (0 < info->n_contexts)
1672 GNUNET_free (info->contexts);
1673 if (0 < info->n_peers)
1674 GNUNET_free (info->peers);
1675 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
1677 GNUNET_SCHEDULER_cancel(info->timeout);
1683 /******************************************************************************/
1684 /************************ PERIODIC FUNCTIONS ****************************/
1685 /******************************************************************************/
1688 * Announce iterator over for each application provided by the peer
1690 * @param cls closure
1691 * @param key current key code
1692 * @param value value in the hash map
1693 * @return GNUNET_YES if we should continue to
1698 announce_application (void *cls, const struct GNUNET_HashCode * key, void *value)
1700 struct PBlock block;
1701 struct MeshClient *c;
1703 block.id = my_full_id;
1704 c = GNUNET_CONTAINER_multihashmap_get (applications, key);
1705 GNUNET_assert(NULL != c);
1706 block.type = (long) GNUNET_CONTAINER_multihashmap_get (c->apps, key);
1707 if (0 == block.type)
1712 block.type = htonl (block.type);
1714 GNUNET_break (NULL !=
1715 GNUNET_DHT_put (dht_handle, key,
1716 dht_replication_level,
1717 GNUNET_DHT_RO_RECORD_ROUTE |
1718 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1719 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
1721 (const char *) &block,
1722 GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_HOURS), /* FIXME: this should be an option */
1723 app_announce_time, NULL, NULL));
1730 * Function called when the DHT regex put is complete.
1732 * @param the 'struct MeshClient' for which we were PUTting
1733 * @param success GNUNET_OK if the PUT was transmitted,
1734 * GNUNET_NO on timeout,
1735 * GNUNET_SYSERR on disconnect from service
1736 * after the PUT message was transmitted
1737 * (so we don't know if it was received or not)
1740 announce_regex_done (void *cls,
1743 struct MeshClient *c = cls;
1750 * Regex callback iterator to store own service description in the DHT.
1752 * @param cls closure.
1753 * @param key hash for current state.
1754 * @param proof proof for current state.
1755 * @param accepting GNUNET_YES if this is an accepting state, GNUNET_NO if not.
1756 * @param num_edges number of edges leaving current state.
1757 * @param edges edges leaving current state.
1760 regex_iterator (void *cls,
1761 const struct GNUNET_HashCode *key,
1764 unsigned int num_edges,
1765 const struct GNUNET_REGEX_Edge *edges)
1767 struct MeshRegexBlock *block;
1768 struct MeshRegexEdge *block_edge;
1769 enum GNUNET_DHT_RouteOption opt;
1773 unsigned int offset;
1776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1777 " regex dht put for state %s\n",
1779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1786 opt = GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE;
1787 if (GNUNET_YES == accepting)
1789 struct MeshRegexAccept block;
1791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1792 " state %s is accepting, putting own id\n",
1794 size = sizeof (block);
1796 block.id = my_full_id;
1797 GNUNET_STATISTICS_update (stats, "# regex accepting blocks stored",
1799 GNUNET_STATISTICS_update (stats, "# regex accepting block bytes stored",
1800 sizeof (block), GNUNET_NO);
1802 GNUNET_DHT_put(dht_handle, key,
1803 dht_replication_level,
1804 opt/* | GNUNET_DHT_RO_RECORD_ROUTE*/,
1805 GNUNET_BLOCK_TYPE_MESH_REGEX_ACCEPT,
1808 GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_HOURS), /* FIXME: expiration time should be option */
1812 len = strlen(proof);
1813 size = sizeof (struct MeshRegexBlock) + len;
1814 block = GNUNET_malloc (size);
1817 block->n_proof = htonl (len);
1818 block->n_edges = htonl (num_edges);
1819 block->accepting = htonl (accepting);
1821 /* Store the proof at the end of the block. */
1822 aux = (char *) &block[1];
1823 memcpy (aux, proof, len);
1826 /* Store each edge in a variable length MeshEdge struct at the
1827 * very end of the MeshRegexBlock structure.
1829 for (i = 0; i < num_edges; i++)
1831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1832 " edge %s towards %s\n",
1834 GNUNET_h2s(&edges[i].destination));
1836 /* aux points at the end of the last block */
1837 len = strlen (edges[i].label);
1838 size += sizeof (struct MeshRegexEdge) + len;
1839 // Calculate offset FIXME is this ok? use size instead?
1840 offset = aux - (char *) block;
1841 block = GNUNET_realloc (block, size);
1842 aux = &((char *) block)[offset];
1843 block_edge = (struct MeshRegexEdge *) aux;
1844 block_edge->key = edges[i].destination;
1845 block_edge->n_token = htonl (len);
1846 aux = (char *) &block_edge[1];
1847 memcpy (aux, edges[i].label, len);
1851 GNUNET_DHT_put(dht_handle, key,
1852 dht_replication_level,
1854 GNUNET_BLOCK_TYPE_MESH_REGEX, size,
1856 GNUNET_TIME_relative_to_absolute (GNUNET_TIME_UNIT_HOURS), /* FIXME: this should be an option */
1859 GNUNET_STATISTICS_update (stats, "# regex blocks stored",
1861 GNUNET_STATISTICS_update (stats, "# regex block bytes stored",
1864 GNUNET_free (block);
1869 * Store the regular expression describing a local service into the DHT.
1871 * @param regex The regular expresion.
1874 regex_put (struct MeshRegexDescriptor *regex)
1876 if (NULL == regex->dfa)
1878 regex->dfa = GNUNET_REGEX_construct_dfa (regex->regex,
1879 strlen (regex->regex),
1880 regex->compression);
1883 DEBUG_DHT (" regex_put (%s) start\n", regex->regex);
1884 GNUNET_REGEX_iterate_all_edges (regex->dfa, ®ex_iterator, NULL);
1885 DEBUG_DHT (" regex_put (%s) end\n", regex->regex);
1890 * Periodically announce what applications are provided by local clients
1893 * @param cls closure
1894 * @param tc task context
1897 announce_regex (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1899 struct MeshClient *c = cls;
1902 c->regex_announce_task = GNUNET_SCHEDULER_NO_TASK;
1903 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1905 DEBUG_DHT ("Starting PUT for regex\n");
1906 for (i = 0; i < c->n_regex; i++)
1907 regex_put (&c->regexes[i]);
1908 c->regex_announce_task = GNUNET_SCHEDULER_add_delayed (app_announce_time,
1911 DEBUG_DHT ("Finished PUT for regex\n");
1916 * Periodically announce what applications are provided by local clients
1919 * @param cls closure
1920 * @param tc task context
1923 announce_applications (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1925 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1927 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
1931 DEBUG_DHT ("Starting PUT for apps\n");
1933 GNUNET_CONTAINER_multihashmap_iterate (applications, &announce_application,
1935 announce_applications_task =
1936 GNUNET_SCHEDULER_add_delayed (app_announce_time, &announce_applications,
1938 DEBUG_DHT ("Finished PUT for apps\n");
1943 * Periodically announce self id in the DHT
1945 * @param cls closure
1946 * @param tc task context
1949 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1951 struct PBlock block;
1953 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1955 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1959 * - Set data expiration in function of X
1960 * - Adapt X to churn
1962 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1964 block.id = my_full_id;
1965 block.type = htonl (0);
1966 GNUNET_DHT_put (dht_handle, /* DHT handle */
1967 &my_full_id.hashPubKey, /* Key to use */
1968 dht_replication_level, /* Replication level */
1969 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1970 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1971 sizeof (block), /* Size of the data */
1972 (const char *) &block, /* Data itself */
1973 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1974 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1975 NULL, /* Continuation */
1976 NULL); /* Continuation closure */
1978 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1982 /******************************************************************************/
1983 /****************** GENERAL HELPER FUNCTIONS ************************/
1984 /******************************************************************************/
1987 * Decrements the reference counter and frees all resources if needed
1989 * @param mesh_data Data Descriptor used in a multicast message.
1990 * Freed no longer needed (last message).
1993 data_descriptor_decrement_rc (struct MeshData *mesh_data)
1995 if (0 == --(mesh_data->reference_counter))
1997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Last copy!\n");
1998 GNUNET_free (mesh_data->data);
1999 GNUNET_free (mesh_data);
2005 * Check if client has registered with the service and has not disconnected
2007 * @param client the client to check
2009 * @return non-NULL if client exists in the global DLL
2011 static struct MeshClient *
2012 client_get (struct GNUNET_SERVER_Client *client)
2014 struct MeshClient *c;
2019 if (c->handle == client)
2028 * Checks if a given client has subscribed to certain message type
2030 * @param message_type Type of message to check
2031 * @param c Client to check
2033 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
2035 * FIXME: use of crypto_hash slows it down
2036 * The hash function alone takes 8-10us out of the ~55us for the whole
2037 * process of retransmitting the message from one local client to another.
2038 * Find faster implementation!
2041 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
2043 struct GNUNET_HashCode hc;
2045 if (NULL == c->types)
2048 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
2049 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
2054 * Check whether client wants traffic from a tunnel.
2056 * @param c Client to check.
2057 * @param t Tunnel to be found.
2059 * @return GNUNET_YES if client knows tunnel.
2061 * TODO look in client hashmap
2064 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
2068 for (i = 0; i < t->nclients; i++)
2069 if (t->clients[i] == c)
2076 * Check whether client has been informed about a tunnel.
2078 * @param c Client to check.
2079 * @param t Tunnel to be found.
2081 * @return GNUNET_YES if client knows tunnel.
2083 * TODO look in client hashmap
2086 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
2090 for (i = 0; i < t->nignore; i++)
2091 if (t->ignore[i] == c)
2093 return client_wants_tunnel(c, t);
2098 * Marks a client as uninterested in traffic from the tunnel, updating both
2099 * client and tunnel to reflect this.
2101 * @param c Client that doesn't want traffic anymore.
2102 * @param t Tunnel which should be ignored.
2104 * FIXME when to delete an incoming tunnel?
2107 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
2109 struct GNUNET_HashCode hash;
2111 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2112 GNUNET_break (GNUNET_YES ==
2113 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
2115 GNUNET_break (GNUNET_YES ==
2116 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
2117 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2118 tunnel_delete_active_client (t, c);
2119 GNUNET_array_append (t->ignore, t->nignore, c);
2124 * Deletes a tunnel from a client (either owner or destination). To be used on
2125 * tunnel destroy, otherwise, use client_ignore_tunnel.
2127 * @param c Client whose tunnel to delete.
2128 * @param t Tunnel which should be deleted.
2131 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
2133 struct GNUNET_HashCode hash;
2137 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2138 GNUNET_assert (GNUNET_YES ==
2139 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
2145 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2147 GNUNET_assert (GNUNET_YES ==
2148 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
2152 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
2160 * Send the message to all clients that have subscribed to its type
2162 * @param msg Pointer to the message itself
2163 * @param payload Pointer to the payload of the message.
2164 * @param t The tunnel to whose clients this message goes.
2166 * @return number of clients this message was sent to
2169 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
2170 const struct GNUNET_MessageHeader *payload,
2171 struct MeshTunnel *t)
2173 struct MeshClient *c;
2174 MESH_TunnelNumber *tid;
2177 char cbuf[htons (msg->size)];
2179 type = ntohs (payload->type);
2180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
2181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %s\n",
2182 GNUNET_MESH_DEBUG_M2S (type));
2184 memcpy (cbuf, msg, sizeof (cbuf));
2185 switch (htons (msg->type))
2187 struct GNUNET_MESH_Unicast *uc;
2188 struct GNUNET_MESH_Multicast *mc;
2189 struct GNUNET_MESH_ToOrigin *to;
2191 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2192 uc = (struct GNUNET_MESH_Unicast *) cbuf;
2195 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
2196 mc = (struct GNUNET_MESH_Multicast *) cbuf;
2199 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2200 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
2208 for (count = 0, c = clients; c != NULL; c = c->next)
2210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
2211 if (client_is_subscribed (type, c))
2213 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
2217 *tid = htonl (t->local_tid);
2221 if (GNUNET_NO == client_knows_tunnel (c, t))
2223 /* This client doesn't know the tunnel */
2224 struct GNUNET_MESH_TunnelNotification tmsg;
2225 struct GNUNET_HashCode hash;
2227 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
2228 tmsg.header.size = htons (sizeof (tmsg));
2229 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
2230 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
2231 tmsg.tunnel_id = htonl (t->local_tid_dest);
2233 if (GNUNET_YES == t->speed_min)
2234 tmsg.opt |= MESH_TUNNEL_OPT_SPEED_MIN;
2235 if (GNUNET_YES == t->nobuffer)
2236 tmsg.opt |= MESH_TUNNEL_OPT_NOBUFFER;
2237 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2238 &tmsg.header, GNUNET_NO);
2239 tunnel_add_client (t, c);
2240 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2242 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
2243 c->incoming_tunnels, &hash, t,
2244 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
2246 *tid = htonl (t->local_tid_dest);
2249 /* Check if the client wants to get traffic from the tunnel */
2250 if (GNUNET_NO == client_wants_tunnel(c, t))
2253 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
2254 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2255 (struct GNUNET_MessageHeader
2256 *) cbuf, GNUNET_NO);
2265 * Notify the client that owns the tunnel that a peer has connected to it
2266 * (the requested path to it has been confirmed).
2268 * @param t Tunnel whose owner to notify
2269 * @param id Short id of the peer that has connected
2272 send_client_peer_connected (const struct MeshTunnel *t, const GNUNET_PEER_Id id)
2274 struct GNUNET_MESH_PeerControl pc;
2276 if (NULL == t->owner || GNUNET_YES == t->destroy)
2279 pc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD);
2280 pc.header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
2281 pc.tunnel_id = htonl (t->local_tid);
2282 GNUNET_PEER_resolve (id, &pc.peer);
2283 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle, &pc.header,
2289 * Notify all clients (not depending on registration status) that the incoming
2290 * tunnel is no longer valid.
2292 * @param t Tunnel that was destroyed.
2295 send_clients_tunnel_destroy (struct MeshTunnel *t)
2297 struct GNUNET_MESH_TunnelMessage msg;
2299 msg.header.size = htons (sizeof (msg));
2300 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2301 msg.tunnel_id = htonl (t->local_tid_dest);
2302 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
2307 * Notify clients of tunnel disconnections, if needed.
2308 * In case the origin disconnects, the destination clients get a tunnel destroy
2309 * notification. If the last destination disconnects (only one remaining client
2310 * in tunnel), the origin gets a (local ID) peer disconnected.
2311 * Note that the function must be called BEFORE removing the client from
2314 * @param t Tunnel that was destroyed.
2315 * @param c Client that disconnected.
2318 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
2324 struct GNUNET_MESH_TunnelMessage msg;
2326 msg.header.size = htons (sizeof (msg));
2327 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
2328 msg.tunnel_id = htonl (t->local_tid_dest);
2329 for (i = 0; i < t->nclients; i++)
2330 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
2331 &msg.header, GNUNET_NO);
2333 // FIXME when to disconnect an incoming tunnel?
2334 else if (1 == t->nclients && NULL != t->owner)
2336 struct GNUNET_MESH_PeerControl msg;
2338 msg.header.size = htons (sizeof (msg));
2339 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
2340 msg.tunnel_id = htonl (t->local_tid);
2341 msg.peer = my_full_id;
2342 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2343 &msg.header, GNUNET_NO);
2349 * Iterator over all the peers to remove the oldest not-used entry.
2351 * @param cls Closure (unsued).
2352 * @param key ID of the peer.
2353 * @param value Peer_Info of the peer.
2358 peer_info_timeout (void *cls,
2359 const struct GNUNET_HashCode *key,
2366 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2367 * and insert it in the appropiate structures if the peer is not known yet.
2369 * @param peer Full identity of the peer.
2371 * @return Existing or newly created peer info.
2373 static struct MeshPeerInfo *
2374 peer_info_get (const struct GNUNET_PeerIdentity *peer)
2376 struct MeshPeerInfo *peer_info;
2378 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
2379 if (NULL == peer_info)
2382 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
2383 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
2385 GNUNET_CONTAINER_multihashmap_iterate (peers,
2389 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
2390 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
2391 peer_info->id = GNUNET_PEER_intern (peer);
2393 peer_info->last_contact = GNUNET_TIME_absolute_get();
2400 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
2401 * and insert it in the appropiate structures if the peer is not known yet.
2403 * @param peer Short identity of the peer.
2405 * @return Existing or newly created peer info.
2407 static struct MeshPeerInfo *
2408 peer_info_get_short (const GNUNET_PEER_Id peer)
2410 struct GNUNET_PeerIdentity id;
2412 GNUNET_PEER_resolve (peer, &id);
2413 return peer_info_get (&id);
2418 * Iterator to remove the tunnel from the list of tunnels a peer participates
2421 * @param cls Closure (tunnel info)
2422 * @param key GNUNET_PeerIdentity of the peer (unused)
2423 * @param value PeerInfo of the peer
2425 * @return always GNUNET_YES, to keep iterating
2428 peer_info_delete_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
2430 struct MeshTunnel *t = cls;
2431 struct MeshPeerInfo *peer = value;
2434 for (i = 0; i < peer->ntunnels; i++)
2437 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
2440 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
2441 peer->tunnels = GNUNET_realloc (peer->tunnels, peer->ntunnels);
2450 * Core callback to write a pre-constructed data packet to core buffer
2452 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2453 * @param size Number of bytes available in buf.
2454 * @param buf Where the to write the message.
2456 * @return number of bytes written to buf
2459 send_core_data_raw (void *cls, size_t size, void *buf)
2461 struct MeshTransmissionDescriptor *info = cls;
2462 struct GNUNET_MessageHeader *msg;
2465 GNUNET_assert (NULL != info);
2466 GNUNET_assert (NULL != info->mesh_data);
2467 msg = (struct GNUNET_MessageHeader *) info->mesh_data->data;
2468 total_size = ntohs (msg->size);
2470 if (total_size > size)
2475 memcpy (buf, msg, total_size);
2476 data_descriptor_decrement_rc (info->mesh_data);
2483 * Sends an already built non-multicast message to a peer,
2484 * properly registrating all used resources.
2486 * @param message Message to send. Function makes a copy of it.
2487 * @param peer Short ID of the neighbor whom to send the message.
2488 * @param t Tunnel on which this message is transmitted.
2491 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
2492 const struct GNUNET_PeerIdentity *peer,
2493 struct MeshTunnel *t)
2495 struct MeshTransmissionDescriptor *info;
2496 struct MeshPeerInfo *neighbor;
2497 struct MeshPeerPath *p;
2501 // GNUNET_TRANSPORT_try_connect(); FIXME use?
2503 size = ntohs (message->size);
2504 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2505 info->mesh_data = GNUNET_malloc (sizeof (struct MeshData));
2506 info->mesh_data->data = GNUNET_malloc (size);
2507 memcpy (info->mesh_data->data, message, size);
2508 type = ntohs(message->type);
2511 struct GNUNET_MESH_Unicast *m;
2512 struct GNUNET_MESH_ToOrigin *to;
2514 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2515 m = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2516 m->ttl = htonl (ntohl (m->ttl) - 1);
2518 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2519 to = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
2521 to->pid = htonl(t->bck_pid);
2523 info->mesh_data->data_len = size;
2524 info->mesh_data->reference_counter = 1;
2525 info->mesh_data->total_out = 1;
2526 neighbor = peer_info_get (peer);
2527 for (p = neighbor->path_head; NULL != p; p = p->next)
2537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2538 " %s IS NOT DIRECTLY CONNECTED\n",
2540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2543 for (p = neighbor->path_head; NULL != p; p = p->next)
2545 struct GNUNET_PeerIdentity debug_id;
2548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2549 " path with %u hops through:\n",
2551 for (i = 0; i < p->length; i++)
2553 GNUNET_PEER_resolve(p->peers[i], &debug_id);
2554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2556 i, GNUNET_i2s(&debug_id));
2560 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
2561 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2562 " no direct connection to %s\n",
2564 GNUNET_free (info->mesh_data->data);
2565 GNUNET_free (info->mesh_data);
2569 info->peer = neighbor;
2570 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
2581 * Sends a CREATE PATH message for a path to a peer, properly registrating
2582 * all used resources.
2584 * @param peer PeerInfo of the final peer for whom this path is being created.
2585 * @param p Path itself.
2586 * @param t Tunnel for which the path is created.
2589 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
2590 struct MeshTunnel *t)
2592 struct GNUNET_PeerIdentity id;
2593 struct MeshPathInfo *path_info;
2594 struct MeshPeerInfo *neighbor;
2600 p = tree_get_path_to_peer (t->tree, peer->id);
2607 for (i = 0; i < p->length; i++)
2609 if (p->peers[i] == myid)
2612 if (i >= p->length - 1)
2618 GNUNET_PEER_resolve (p->peers[i + 1], &id);
2620 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2621 path_info->path = p;
2623 neighbor = peer_info_get (&id);
2624 path_info->peer = neighbor;
2625 queue_add (path_info,
2626 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
2627 sizeof (struct GNUNET_MESH_ManipulatePath) +
2628 (p->length * sizeof (struct GNUNET_PeerIdentity)),
2635 * Sends a DESTROY PATH message to free resources for a path in a tunnel
2637 * @param t Tunnel whose path to destroy.
2638 * @param destination Short ID of the peer to whom the path to destroy.
2641 send_destroy_path (struct MeshTunnel *t, GNUNET_PEER_Id destination)
2643 struct MeshPeerPath *p;
2646 p = tree_get_path_to_peer (t->tree, destination);
2652 size = sizeof (struct GNUNET_MESH_ManipulatePath);
2653 size += p->length * sizeof (struct GNUNET_PeerIdentity);
2655 struct GNUNET_MESH_ManipulatePath *msg;
2656 struct GNUNET_PeerIdentity *pi;
2660 msg = (struct GNUNET_MESH_ManipulatePath *) cbuf;
2661 msg->header.size = htons (size);
2662 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY);
2663 msg->tid = htonl (t->id.tid);
2664 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2665 for (i = 0; i < p->length; i++)
2667 GNUNET_PEER_resolve (p->peers[i], &pi[i]);
2669 send_prebuilt_message (&msg->header, tree_get_first_hop (t->tree, destination), t);
2676 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
2678 * @param t Tunnel which to confirm.
2681 send_path_ack (struct MeshTunnel *t)
2683 struct MeshTransmissionDescriptor *info;
2684 struct GNUNET_PeerIdentity id;
2685 GNUNET_PEER_Id peer;
2687 peer = tree_get_predecessor (t->tree);
2688 GNUNET_PEER_resolve (peer, &id);
2689 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
2690 info->origin = &t->id;
2691 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
2692 GNUNET_assert (NULL != info->peer);
2695 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
2696 sizeof (struct GNUNET_MESH_PathACK),
2703 * Try to establish a new connection to this peer.
2704 * Use the best path for the given tunnel.
2705 * If the peer doesn't have any path to it yet, try to get one.
2706 * If the peer already has some path, send a CREATE PATH towards it.
2708 * @param peer PeerInfo of the peer.
2709 * @param t Tunnel for which to create the path, if possible.
2712 peer_info_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
2714 struct MeshPeerPath *p;
2715 struct MeshPathInfo *path_info;
2717 if (NULL != peer->path_head)
2719 p = tree_get_path_to_peer (t->tree, peer->id);
2726 // FIXME always send create path to self
2729 send_create_path (peer, p, t);
2733 struct GNUNET_HashCode hash;
2736 send_client_peer_connected (t, myid);
2737 t->local_tid_dest = next_local_tid++;
2738 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
2741 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2742 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2749 else if (NULL == peer->dhtget)
2751 struct GNUNET_PeerIdentity id;
2753 GNUNET_PEER_resolve (peer->id, &id);
2754 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
2755 path_info->peer = peer;
2757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2758 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
2759 peer->dhtgetcls = path_info;
2760 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2761 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2762 &id.hashPubKey, /* key to search */
2763 dht_replication_level, /* replication level */
2764 GNUNET_DHT_RO_RECORD_ROUTE |
2765 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2766 NULL, /* xquery */ // FIXME BLOOMFILTER
2767 0, /* xquery bits */ // FIXME BLOOMFILTER SIZE
2768 &dht_get_id_handler, path_info);
2770 /* Otherwise, there is no path but the DHT get is already started. */
2775 * Task to delay the connection of a peer
2777 * @param cls Closure (path info with tunnel and peer to connect).
2778 * Will be free'd on exection.
2779 * @param tc TaskContext
2782 peer_info_connect_task (void *cls,
2783 const struct GNUNET_SCHEDULER_TaskContext *tc)
2785 struct MeshPathInfo *path_info = cls;
2787 path_info->peer->connect_task = GNUNET_SCHEDULER_NO_TASK;
2789 if (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & tc->reason))
2794 peer_info_connect (path_info->peer, path_info->t);
2800 * Destroy the peer_info and free any allocated resources linked to it
2802 * @param pi The peer_info to destroy.
2804 * @return GNUNET_OK on success
2807 peer_info_destroy (struct MeshPeerInfo *pi)
2809 struct GNUNET_PeerIdentity id;
2810 struct MeshPeerPath *p;
2811 struct MeshPeerPath *nextp;
2813 GNUNET_PEER_resolve (pi->id, &id);
2814 GNUNET_PEER_change_rc (pi->id, -1);
2817 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
2820 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2821 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2823 if (NULL != pi->dhtget)
2825 GNUNET_DHT_get_stop (pi->dhtget);
2826 GNUNET_free (pi->dhtgetcls);
2832 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
2836 if (GNUNET_SCHEDULER_NO_TASK != pi->connect_task)
2838 GNUNET_free (GNUNET_SCHEDULER_cancel (pi->connect_task));
2846 * Remove all paths that rely on a direct connection between p1 and p2
2847 * from the peer itself and notify all tunnels about it.
2849 * @param peer PeerInfo of affected peer.
2850 * @param p1 GNUNET_PEER_Id of one peer.
2851 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2854 * TODO: optimize (see below)
2857 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
2860 struct MeshPeerPath *p;
2861 struct MeshPeerPath *aux;
2862 struct MeshPeerInfo *peer_d;
2864 unsigned int destroyed;
2869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2871 p = peer->path_head;
2875 for (i = 0; i < (p->length - 1); i++)
2877 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2878 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2880 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2891 for (i = 0; i < peer->ntunnels; i++)
2893 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
2897 * Problem: one or more peers have been deleted from the tunnel tree.
2898 * We don't know who they are to try to add them again.
2899 * We need to try to find a new path for each of the disconnected peers.
2900 * Some of them might already have a path to reach them that does not
2901 * involve p1 and p2. Adding all anew might render in a better tree than
2902 * the trivial immediate fix.
2904 * Trivial immiediate fix: try to reconnect to the disconnected node. All
2905 * its children will be reachable trough him.
2907 peer_d = peer_info_get_short (d);
2910 for (p = peer_d->path_head; NULL != p; p = p->next)
2912 if ((cost = tree_get_path_cost (peer->tunnels[i]->tree, p)) < best)
2920 /* No callback, as peer will be already disconnected and a connection
2921 * scheduled by tunnel_notify_connection_broken.
2923 tree_add_path (peer->tunnels[i]->tree, aux, NULL, NULL);
2927 peer_info_connect (peer_d, peer->tunnels[i]);
2930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2935 * Add the path to the peer and update the path used to reach it in case this
2938 * @param peer_info Destination peer to add the path to.
2939 * @param path New path to add. Last peer must be the peer in arg 1.
2940 * Path will be either used of freed if already known.
2941 * @param trusted Do we trust that this path is real?
2944 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
2947 struct MeshPeerPath *aux;
2951 if ((NULL == peer_info) || (NULL == path))
2954 path_destroy (path);
2957 if (path->peers[path->length - 1] != peer_info->id)
2960 path_destroy (path);
2963 if (path->length <= 2 && GNUNET_NO == trusted)
2965 /* Only allow CORE to tell us about direct paths */
2966 path_destroy (path);
2969 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2970 for (l = 1; l < path->length; l++)
2972 if (path->peers[l] == myid)
2974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2975 for (l2 = 0; l2 < path->length - l; l2++)
2977 path->peers[l2] = path->peers[l + l2];
2982 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2987 struct GNUNET_PeerIdentity id;
2989 GNUNET_PEER_resolve (peer_info->id, &id);
2990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2991 path->length, GNUNET_i2s (&id));
2994 l = path_get_length (path);
3001 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
3002 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
3004 l2 = path_get_length (aux);
3007 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
3008 peer_info->path_tail, aux, path);
3013 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
3015 path_destroy (path);
3020 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
3027 * Add the path to the origin peer and update the path used to reach it in case
3028 * this is the shortest.
3029 * The path is given in peer_info -> destination, therefore we turn the path
3030 * upside down first.
3032 * @param peer_info Peer to add the path to, being the origin of the path.
3033 * @param path New path to add after being inversed.
3034 * @param trusted Do we trust that this path is real?
3037 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
3038 struct MeshPeerPath *path, int trusted)
3041 peer_info_add_path (peer_info, path, trusted);
3046 * Function called if the connection to the peer has been stalled for a while,
3047 * possibly due to a missed ACK. Poll the peer about its ACK status.
3049 * @param cls Closure (cinfo).
3050 * @param tc TaskContext.
3053 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3055 struct MeshTunnelChildInfo *cinfo = cls;
3056 struct GNUNET_MESH_Poll msg;
3057 struct GNUNET_PeerIdentity id;
3058 struct MeshTunnel *t;
3060 cinfo->fc_poll = GNUNET_SCHEDULER_NO_TASK;
3061 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3067 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
3068 msg.header.size = htons (sizeof (msg));
3069 msg.tid = htonl (t->id.tid);
3070 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3071 msg.last_ack = htonl (cinfo->fwd_ack);
3073 GNUNET_PEER_resolve (cinfo->id, &id);
3074 send_prebuilt_message (&msg.header, &id, cinfo->t);
3075 cinfo->fc_poll_time = GNUNET_TIME_relative_min (
3077 GNUNET_TIME_relative_multiply (cinfo->fc_poll_time, 2));
3078 cinfo->fc_poll = GNUNET_SCHEDULER_add_delayed (cinfo->fc_poll_time,
3079 &tunnel_poll, cinfo);
3084 * Build a PeerPath from the paths returned from the DHT, reversing the paths
3085 * to obtain a local peer -> destination path and interning the peer ids.
3087 * @return Newly allocated and created path
3089 static struct MeshPeerPath *
3090 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
3091 unsigned int get_path_length,
3092 const struct GNUNET_PeerIdentity *put_path,
3093 unsigned int put_path_length)
3095 struct MeshPeerPath *p;
3101 GNUNET_PEER_change_rc (myid, 1);
3102 i = get_path_length;
3103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
3104 for (i--; i >= 0; i--)
3106 id = GNUNET_PEER_intern (&get_path[i]);
3107 if (p->length > 0 && id == p->peers[p->length - 1])
3109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
3110 GNUNET_PEER_change_rc (id, -1);
3114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
3115 GNUNET_i2s (&get_path[i]));
3117 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
3118 p->peers[p->length - 1] = id;
3121 i = put_path_length;
3122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
3123 for (i--; i >= 0; i--)
3125 id = GNUNET_PEER_intern (&put_path[i]);
3128 /* PUT path went through us, so discard the path up until now and start
3129 * from here to get a much shorter (and loop-free) path.
3134 if (p->length > 0 && id == p->peers[p->length - 1])
3136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
3137 GNUNET_PEER_change_rc (id, -1);
3141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
3142 GNUNET_i2s (&put_path[i]));
3144 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
3145 p->peers[p->length - 1] = id;
3149 if (get_path_length > 0)
3150 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
3151 GNUNET_i2s (&get_path[0]));
3152 if (put_path_length > 0)
3153 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
3154 GNUNET_i2s (&put_path[0]));
3155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
3157 for (i = 0; i < p->length; i++)
3159 struct GNUNET_PeerIdentity peer_id;
3161 GNUNET_PEER_resolve (p->peers[i], &peer_id);
3162 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
3163 GNUNET_i2s (&peer_id));
3171 * Adds a path to the peer_infos of all the peers in the path
3173 * @param p Path to process.
3174 * @param confirmed Whether we know if the path works or not.
3177 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
3181 /* TODO: invert and add */
3182 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
3183 for (i++; i < p->length; i++)
3185 struct MeshPeerInfo *aux;
3186 struct MeshPeerPath *copy;
3188 aux = peer_info_get_short (p->peers[i]);
3189 copy = path_duplicate (p);
3190 copy->length = i + 1;
3191 peer_info_add_path (aux, copy, GNUNET_NO);
3197 * Send keepalive packets for a peer
3199 * @param cls Closure (tunnel for which to send the keepalive).
3200 * @param tc Notification context.
3202 * TODO: implement explicit multicast keepalive?
3205 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
3209 * Search for a tunnel among the incoming tunnels
3211 * @param tid the local id of the tunnel
3213 * @return tunnel handler, NULL if doesn't exist
3215 static struct MeshTunnel *
3216 tunnel_get_incoming (MESH_TunnelNumber tid)
3218 struct GNUNET_HashCode hash;
3220 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
3221 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3222 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
3227 * Search for a tunnel among the tunnels for a client
3229 * @param c the client whose tunnels to search in
3230 * @param tid the local id of the tunnel
3232 * @return tunnel handler, NULL if doesn't exist
3234 static struct MeshTunnel *
3235 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
3237 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3239 return tunnel_get_incoming (tid);
3243 struct GNUNET_HashCode hash;
3245 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
3246 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
3252 * Search for a tunnel by global ID using PEER_ID
3254 * @param pi owner of the tunnel
3255 * @param tid global tunnel number
3257 * @return tunnel handler, NULL if doesn't exist
3259 static struct MeshTunnel *
3260 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
3262 struct MESH_TunnelID id;
3263 struct GNUNET_HashCode hash;
3268 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
3269 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
3274 * Search for a tunnel by global ID using full PeerIdentities
3276 * @param oid owner of the tunnel
3277 * @param tid global tunnel number
3279 * @return tunnel handler, NULL if doesn't exist
3281 static struct MeshTunnel *
3282 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
3284 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
3289 * Delete an active client from the tunnel.
3295 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
3299 for (i = 0; i < t->nclients; i++)
3301 if (t->clients[i] == c)
3303 t->clients[i] = t->clients[t->nclients - 1];
3304 t->clients_fc[i] = t->clients_fc[t->nclients - 1];
3305 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
3307 GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
3315 * Delete an ignored client from the tunnel.
3321 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
3325 for (i = 0; i < t->nignore; i++)
3327 if (t->ignore[i] == c)
3329 t->ignore[i] = t->ignore[t->nignore - 1];
3330 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
3338 * Delete a client from the tunnel. It should be only done on
3339 * client disconnection, otherwise use client_ignore_tunnel.
3345 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
3347 tunnel_delete_ignored_client (t, c);
3348 tunnel_delete_active_client (t, c);
3353 * @brief Iterator to destroy MeshTunnelChildInfo of tunnel children.
3355 * Destroys queue elements of all waiting transmissions and frees all memory
3356 * used by the struct and its elements.
3358 * @param cls Closure (tunnel info).
3359 * @param key Hash of GNUNET_PEER_Id (unused).
3360 * @param value MeshTunnelChildInfo of the child.
3362 * @return always GNUNET_YES, to keep iterating
3365 tunnel_destroy_child (void *cls,
3366 const struct GNUNET_HashCode * key,
3369 struct MeshTunnelChildInfo *cinfo = value;
3370 struct MeshTunnel *t = cls;
3371 struct MeshPeerQueue *q;
3375 for (c = 0; c < cinfo->send_buffer_n; c++)
3377 i = (cinfo->send_buffer_start + c) % t->fwd_queue_max;
3378 q = cinfo->send_buffer[i];
3379 cinfo->send_buffer[i] = NULL;
3381 queue_destroy (q, GNUNET_YES);
3384 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "%u %u\n", c, cinfo->send_buffer_n);
3386 GNUNET_free_non_null (cinfo->send_buffer);
3387 if (GNUNET_SCHEDULER_NO_TASK != cinfo->fc_poll)
3389 GNUNET_SCHEDULER_cancel (cinfo->fc_poll);
3390 cinfo->fc_poll = GNUNET_SCHEDULER_NO_TASK;
3392 GNUNET_free (cinfo);
3398 * Callback used to notify a client owner of a tunnel that a peer has
3399 * disconnected, most likely because of a path change.
3401 * @param cls Closure (tunnel this notification is about).
3402 * @param peer_id Short ID of disconnected peer.
3405 tunnel_notify_client_peer_disconnected (void *cls, GNUNET_PEER_Id peer_id)
3407 struct MeshTunnel *t = cls;
3408 struct MeshPeerInfo *peer;
3409 struct MeshPathInfo *path_info;
3411 if (NULL != t->owner && NULL != nc)
3413 struct GNUNET_MESH_PeerControl msg;
3415 msg.header.size = htons (sizeof (msg));
3416 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL);
3417 msg.tunnel_id = htonl (t->local_tid);
3418 GNUNET_PEER_resolve (peer_id, &msg.peer);
3419 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3420 &msg.header, GNUNET_NO);
3422 peer = peer_info_get_short (peer_id);
3423 path_info = GNUNET_malloc (sizeof (struct MeshPathInfo));
3424 path_info->peer = peer;
3426 peer->connect_task = GNUNET_SCHEDULER_add_now (&peer_info_connect_task,
3432 * Add a peer to a tunnel, accomodating paths accordingly and initializing all
3433 * needed rescources.
3434 * If peer already exists, reevaluate shortest path and change if different.
3436 * @param t Tunnel we want to add a new peer to
3437 * @param peer PeerInfo of the peer being added
3441 tunnel_add_peer (struct MeshTunnel *t, struct MeshPeerInfo *peer)
3443 struct GNUNET_PeerIdentity id;
3444 struct MeshPeerPath *best_p;
3445 struct MeshPeerPath *p;
3446 unsigned int best_cost;
3449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer\n");
3450 GNUNET_PEER_resolve (peer->id, &id);
3452 GNUNET_CONTAINER_multihashmap_contains (t->peers, &id.hashPubKey))
3455 GNUNET_array_append (peer->tunnels, peer->ntunnels, t);
3456 GNUNET_assert (GNUNET_OK ==
3457 GNUNET_CONTAINER_multihashmap_put (t->peers, &id.hashPubKey,
3459 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3462 if (NULL != (p = peer->path_head))
3465 best_cost = tree_get_path_cost (t->tree, p);
3468 if ((cost = tree_get_path_cost (t->tree, p)) < best_cost)
3475 tree_add_path (t->tree, best_p, &tunnel_notify_client_peer_disconnected, t);
3476 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
3477 t->path_refresh_task =
3478 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3482 /* Start a DHT get */
3483 peer_info_connect (peer, t);
3485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_peer END\n");
3489 * Add a path to a tunnel which we don't own, just to remember the next hop.
3490 * If destination node was already in the tunnel, the first hop information
3491 * will be replaced with the new path.
3493 * @param t Tunnel we want to add a new peer to
3494 * @param p Path to add
3495 * @param own_pos Position of local node in path.
3499 tunnel_add_path (struct MeshTunnel *t, struct MeshPeerPath *p,
3500 unsigned int own_pos)
3502 struct GNUNET_PeerIdentity id;
3504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path\n");
3505 GNUNET_assert (0 != own_pos);
3506 tree_add_path (t->tree, p, NULL, NULL);
3507 if (own_pos < p->length - 1)
3509 GNUNET_PEER_resolve (p->peers[own_pos + 1], &id);
3510 tree_update_first_hops (t->tree, myid, &id);
3512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_add_path END\n");
3516 * Add a client to a tunnel, initializing all needed data structures.
3518 * @param t Tunnel to which add the client.
3519 * @param c Client which to add to the tunnel.
3522 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
3524 struct MeshTunnelClientInfo clinfo;
3526 GNUNET_array_append (t->clients, t->nclients, c);
3527 clinfo.fwd_ack = t->fwd_pid + 1;
3528 clinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
3529 clinfo.fwd_pid = t->fwd_pid;
3530 clinfo.bck_pid = (uint32_t) -1; // Expected next: 0
3532 GNUNET_array_append (t->clients_fc, t->nclients, clinfo);
3537 * Notifies a tunnel that a connection has broken that affects at least
3538 * some of its peers. Sends a notification towards the root of the tree.
3539 * In case the peer is the owner of the tree, notifies the client that owns
3540 * the tunnel and tries to reconnect.
3542 * @param t Tunnel affected.
3543 * @param p1 Peer that got disconnected from p2.
3544 * @param p2 Peer that got disconnected from p1.
3546 * @return Short ID of the peer disconnected (either p1 or p2).
3547 * 0 if the tunnel remained unaffected.
3549 static GNUNET_PEER_Id
3550 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
3556 tree_notify_connection_broken (t->tree, p1, p2,
3557 &tunnel_notify_client_peer_disconnected,
3559 if (myid != p1 && myid != p2)
3565 if (tree_get_predecessor (t->tree) != 0)
3567 /* We are the peer still connected, notify owner of the disconnection. */
3568 struct GNUNET_MESH_PathBroken msg;
3569 struct GNUNET_PeerIdentity neighbor;
3571 msg.header.size = htons (sizeof (msg));
3572 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3573 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3574 msg.tid = htonl (t->id.tid);
3575 msg.peer1 = my_full_id;
3576 GNUNET_PEER_resolve (pid, &msg.peer2);
3577 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3578 send_prebuilt_message (&msg.header, &neighbor, t);
3586 * Send a multicast packet to a neighbor.
3588 * @param cls Closure (Info about the multicast packet)
3589 * @param neighbor_id Short ID of the neighbor to send the packet to.
3592 tunnel_send_multicast_iterator (void *cls, GNUNET_PEER_Id neighbor_id)
3594 struct MeshData *mdata = cls;
3595 struct MeshTransmissionDescriptor *info;
3596 struct GNUNET_PeerIdentity neighbor;
3597 struct GNUNET_MessageHeader *msg;
3599 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
3601 info->mesh_data = mdata;
3602 (mdata->reference_counter) ++;
3603 info->destination = neighbor_id;
3604 GNUNET_PEER_resolve (neighbor_id, &neighbor);
3605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending to %s...\n",
3606 GNUNET_i2s (&neighbor));
3607 info->peer = peer_info_get (&neighbor);
3608 GNUNET_assert (NULL != info->peer);
3609 msg = (struct GNUNET_MessageHeader *) mdata->data;
3612 info->mesh_data->data_len,
3619 * Queue a message in a tunnel in multicast, sending a copy to each child node
3620 * down the local one in the tunnel tree.
3622 * @param t Tunnel in which to send the data.
3623 * @param msg Message to be sent.
3626 tunnel_send_multicast (struct MeshTunnel *t,
3627 const struct GNUNET_MessageHeader *msg)
3629 struct MeshData *mdata;
3631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3632 " sending a multicast packet...\n");
3634 mdata = GNUNET_malloc (sizeof (struct MeshData));
3635 mdata->data_len = ntohs (msg->size);
3637 mdata->data = GNUNET_malloc (mdata->data_len);
3638 memcpy (mdata->data, msg, mdata->data_len);
3639 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3641 struct GNUNET_MESH_Multicast *mcast;
3643 mcast = (struct GNUNET_MESH_Multicast *) mdata->data;
3644 if (t->fwd_queue_n >= t->fwd_queue_max)
3647 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " queue full!\n");
3648 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3649 " message from %s!\n",
3650 GNUNET_i2s(&mcast->oid));
3651 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3652 " message at %s!\n",
3653 GNUNET_i2s(&my_full_id));
3654 GNUNET_free (mdata->data);
3655 GNUNET_free (mdata);
3659 mcast->ttl = htonl (ntohl (mcast->ttl) - 1);
3660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " data packet, ttl: %u\n",
3661 ntohl (mcast->ttl));
3665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not a data packet, no ttl\n");
3668 tree_iterate_children (t->tree, &tunnel_send_multicast_iterator, mdata);
3669 if (mdata->reference_counter == 0)
3671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3672 " no one to send data to\n");
3673 GNUNET_free (mdata->data);
3674 GNUNET_free (mdata);
3675 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
3680 mdata->total_out = mdata->reference_counter;
3682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3683 " sending a multicast packet done\n");
3689 * Increase the SKIP value of all peers that
3690 * have not received a unicast message.
3692 * @param cls Closure (ID of the peer that HAS received the message).
3693 * @param key ID of the neighbor.
3694 * @param value Information about the neighbor.
3696 * @return GNUNET_YES to keep iterating.
3699 tunnel_add_skip (void *cls,
3700 const struct GNUNET_HashCode * key,
3703 struct GNUNET_PeerIdentity *neighbor = cls;
3704 struct MeshTunnelChildInfo *cinfo = value;
3706 /* TODO compare only pointers? key == neighbor? */
3707 if (0 == memcmp (&neighbor->hashPubKey, key, sizeof (struct GNUNET_HashCode)))
3717 * @brief Get neighbor's Flow Control information.
3719 * Retrieves the MeshTunnelChildInfo containing Flow Control data about a direct
3720 * descendant of the local node in a certain tunnel.
3721 * If the info is not yet there (recently created path), creates the data struct
3722 * and inserts it into the tunnel info, initialized to the current tunnel ACK
3725 * @param t Tunnel related.
3726 * @param peer Neighbor whose Flow Control info is needed.
3728 * @return Neighbor's Flow Control info.
3730 static struct MeshTunnelChildInfo *
3731 tunnel_get_neighbor_fc (struct MeshTunnel *t,
3732 const struct GNUNET_PeerIdentity *peer)
3734 struct MeshTunnelChildInfo *cinfo;
3736 if (NULL == t->children_fc)
3739 cinfo = GNUNET_CONTAINER_multihashmap_get (t->children_fc,
3745 cinfo = GNUNET_malloc (sizeof (struct MeshTunnelChildInfo));
3746 cinfo->id = GNUNET_PEER_intern (peer);
3747 cinfo->skip = t->fwd_pid;
3750 delta = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE;
3751 cinfo->fwd_ack = t->fwd_pid + delta;
3752 cinfo->bck_ack = delta;
3753 cinfo->bck_pid = -1;
3755 cinfo->fc_poll = GNUNET_SCHEDULER_NO_TASK;
3756 cinfo->fc_poll_time = GNUNET_TIME_UNIT_SECONDS;
3758 cinfo->send_buffer =
3759 GNUNET_malloc (sizeof(struct MeshPeerQueue *) * t->fwd_queue_max);
3761 GNUNET_assert (GNUNET_OK ==
3762 GNUNET_CONTAINER_multihashmap_put (t->children_fc,
3765 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
3772 * Get the Flow Control info of a client.
3774 * @param t Tunnel on which to look.
3775 * @param c Client whose ACK to get.
3777 * @return ACK value.
3779 static struct MeshTunnelClientInfo *
3780 tunnel_get_client_fc (struct MeshTunnel *t,
3781 struct MeshClient *c)
3785 for (i = 0; i < t->nclients; i++)
3787 if (t->clients[i] != c)
3789 return &t->clients_fc[i];
3792 return NULL; // avoid compiler / coverity complaints
3797 * Iterator to get the appropiate ACK value from all children nodes.
3799 * @param cls Closue (tunnel).
3800 * @param id Id of the child node.
3803 tunnel_get_child_fwd_ack (void *cls,
3806 struct GNUNET_PeerIdentity peer_id;
3807 struct MeshTunnelChildInfo *cinfo;
3808 struct MeshTunnelChildIteratorContext *ctx = cls;
3809 struct MeshTunnel *t = ctx->t;
3812 GNUNET_PEER_resolve (id, &peer_id);
3813 cinfo = tunnel_get_neighbor_fc (t, &peer_id);
3814 ack = cinfo->fwd_ack;
3817 if (GNUNET_NO == ctx->init)
3819 ctx->max_child_ack = ack;
3820 ctx->init = GNUNET_YES;
3823 if (GNUNET_YES == t->speed_min)
3825 ctx->max_child_ack = ctx->max_child_ack > ack ? ack : ctx->max_child_ack;
3829 ctx->max_child_ack = ctx->max_child_ack > ack ? ctx->max_child_ack : ack;
3836 * Get the maximum PID allowed to transmit to any
3837 * tunnel child of the local peer, depending on the tunnel
3838 * buffering/speed settings.
3842 * @return Maximum PID allowed (uint32 MAX), -1LL if node has no children.
3845 tunnel_get_children_fwd_ack (struct MeshTunnel *t)
3847 struct MeshTunnelChildIteratorContext ctx;
3849 ctx.max_child_ack = 0;
3851 ctx.init = GNUNET_NO;
3852 tree_iterate_children (t->tree, tunnel_get_child_fwd_ack, &ctx);
3854 if (0 == ctx.nchildren)
3856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3857 " tunnel has no children, no FWD ACK\n");
3861 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ctx.max_child_ack, t->fwd_pid))
3862 ctx.max_child_ack = t->fwd_pid + 1; // Might overflow, it's ok.
3864 return (int64_t) ctx.max_child_ack;
3869 * Set the FWD ACK value of a client in a particular tunnel.
3871 * @param t Tunnel affected.
3872 * @param c Client whose ACK to set.
3873 * @param ack ACK value.
3876 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
3877 struct MeshClient *c,
3882 for (i = 0; i < t->nclients; i++)
3884 if (t->clients[i] != c)
3886 t->clients_fc[i].fwd_ack = ack;
3894 * Get the highest ACK value of all clients in a particular tunnel,
3895 * according to the buffering/speed settings.
3897 * @param t Tunnel on which to look.
3899 * @return Corresponding ACK value (max uint32_t).
3900 * If no clients are suscribed, -1LL.
3903 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
3908 if (0 == t->nclients)
3910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3911 " tunnel has no clients, no FWD ACK\n");
3915 for (ack = -1LL, i = 0; i < t->nclients; i++)
3918 (GNUNET_YES == t->speed_min &&
3919 GNUNET_YES == GMC_is_pid_bigger (ack, t->clients_fc[i].fwd_ack)) ||
3920 (GNUNET_NO == t->speed_min &&
3921 GNUNET_YES == GMC_is_pid_bigger (t->clients_fc[i].fwd_ack, ack)))
3923 ack = t->clients_fc[i].fwd_ack;
3927 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
3928 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
3930 return (uint32_t) ack;
3935 * Get the current fwd ack value for a tunnel, taking in account the tunnel
3936 * mode and the status of all children nodes.
3940 * @return Maximum PID allowed.
3943 tunnel_get_fwd_ack (struct MeshTunnel *t)
3947 uint32_t buffer_free;
3951 count = t->fwd_pid - t->skip;
3952 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
3953 child_ack = tunnel_get_children_fwd_ack (t);
3954 client_ack = tunnel_get_clients_fwd_ack (t);
3955 if (GNUNET_YES == t->nobuffer)
3958 if (-1LL == child_ack)
3959 child_ack = client_ack;
3960 if (-1LL == child_ack)
3963 client_ack = child_ack = ack;
3968 ack = count + buffer_free; // Overflow? OK!
3970 if (-1LL == child_ack)
3972 // Node has no children, child_ack AND core buffer are irrelevant.
3973 if (-1LL == client_ack) // No children AND no clients? Not good!
3975 GNUNET_STATISTICS_update (stats, "# mesh acks with no target",
3979 return (uint32_t) client_ack;
3981 if (-1LL == client_ack)
3985 if (GNUNET_YES == t->speed_min)
3987 ack = GMC_min_pid ((uint32_t) child_ack, ack);
3988 ack = GMC_min_pid ((uint32_t) client_ack, ack);
3992 ack = GMC_max_pid ((uint32_t) child_ack, ack);
3993 ack = GMC_max_pid ((uint32_t) client_ack, ack);
3995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3996 "c %u, bf %u, ch %lld, cl %lld, ACK: %u\n",
3997 count, buffer_free, child_ack, client_ack, ack);
4003 * Build a local ACK message and send it to a local client.
4005 * @param t Tunnel on which to send the ACK.
4006 * @param c Client to whom send the ACK.
4007 * @param ack Value of the ACK.
4010 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
4012 struct GNUNET_MESH_LocalAck msg;
4014 msg.header.size = htons (sizeof (msg));
4015 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4016 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
4017 msg.max_pid = htonl (ack);
4018 GNUNET_SERVER_notification_context_unicast(nc,
4025 * Build an ACK message and queue it to send to the given peer.
4027 * @param t Tunnel on which to send the ACK.
4028 * @param peer Peer to whom send the ACK.
4029 * @param ack Value of the ACK.
4032 send_ack (struct MeshTunnel *t, struct GNUNET_PeerIdentity *peer, uint32_t ack)
4034 struct GNUNET_MESH_ACK msg;
4036 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
4037 msg.header.size = htons (sizeof (msg));
4038 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
4039 msg.pid = htonl (ack);
4040 msg.tid = htonl (t->id.tid);
4042 send_prebuilt_message (&msg.header, peer, t);
4047 * Notify a the owner of a tunnel about how many more
4048 * payload packages will we accept on a given tunnel.
4050 * @param t Tunnel on which to send the ACK.
4053 tunnel_send_client_fwd_ack (struct MeshTunnel *t)
4057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4058 "Sending client FWD ACK on tunnel %X\n",
4061 ack = tunnel_get_fwd_ack (t);
4063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
4064 if (t->last_fwd_ack == ack)
4066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " same as last, not sending!\n");
4070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
4071 t->last_fwd_ack = ack;
4072 send_local_ack (t, t->owner, ack);
4077 * Send an ACK informing the predecessor about the available buffer space.
4078 * In case there is no predecessor, inform the owning client.
4079 * If buffering is off, send only on behalf of children or self if endpoint.
4080 * If buffering is on, send when sent to children and buffer space is free.
4081 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
4082 * the ACK itself goes "back" (towards root).
4084 * @param t Tunnel on which to send the ACK.
4085 * @param type Type of message that triggered the ACK transmission.
4088 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
4090 struct GNUNET_PeerIdentity id;
4093 if (NULL != t->owner)
4095 tunnel_send_client_fwd_ack (t);
4098 /* Is it after unicast / multicast retransmission? */
4101 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4102 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4104 "ACK due to FWD DATA retransmission\n");
4105 if (GNUNET_YES == t->nobuffer)
4107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
4111 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4112 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
4114 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4115 t->force_ack = GNUNET_YES;
4121 /* Check if we need to transmit the ACK */
4122 if (t->fwd_queue_max > t->fwd_queue_n * 4 &&
4123 GMC_is_pid_bigger(t->last_fwd_ack, t->fwd_pid) &&
4124 GNUNET_NO == t->force_ack)
4126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
4127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4128 " t->qmax: %u, t->qn: %u\n",
4129 t->fwd_queue_max, t->fwd_queue_n);
4130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4131 " t->pid: %u, t->ack: %u\n",
4132 t->fwd_pid, t->last_fwd_ack);
4136 /* Ok, ACK might be necessary, what PID to ACK? */
4137 ack = tunnel_get_fwd_ack (t);
4139 /* If speed_min and not all children have ack'd, dont send yet */
4140 if (ack == t->last_fwd_ack && GNUNET_NO == t->force_ack)
4142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
4146 t->last_fwd_ack = ack;
4147 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
4148 send_ack (t, &id, ack);
4150 t->force_ack = GNUNET_NO;
4155 * Iterator to send a child node a BCK ACK to allow him to send more
4158 * @param cls Closure (tunnel).
4159 * @param id Id of the child node.
4162 tunnel_send_child_bck_ack (void *cls,
4165 struct MeshTunnel *t = cls;
4166 struct MeshTunnelChildInfo *cinfo;
4167 struct GNUNET_PeerIdentity peer;
4170 GNUNET_PEER_resolve (id, &peer);
4171 cinfo = tunnel_get_neighbor_fc (t, &peer);
4172 ack = cinfo->bck_pid + t->bck_queue_max - t->bck_queue_n;
4174 if (cinfo->bck_ack == ack && GNUNET_NO == t->force_ack)
4176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4177 " Not sending ACK, not needed\n");
4180 cinfo->bck_ack = ack;
4182 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4183 " Sending BCK ACK %u (last sent: %u)\n",
4184 ack, cinfo->bck_ack);
4185 send_ack (t, &peer, ack);
4190 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
4192 * Iterates over all clients and sends BCK ACKs to the ones that need it.
4194 * FIXME fc: what happens if we have 2 clients but q_size is 1?
4195 * - implement a size 1 buffer in each client_fc AND children_fc
4196 * to hold at least 1 message per "child".
4197 * problem: violates no buffer policy
4198 * - ack 0 and make "children" poll for transmission slots
4199 * problem: big overhead, extra latency even in low traffic
4202 * @param t Tunnel on which to send the BCK ACKs.
4205 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
4208 unsigned int tunnel_delta;
4210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Sending BCK ACK to clients\n");
4212 tunnel_delta = t->bck_queue_max - t->bck_queue_n;
4213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " tunnel delta: %u\n", tunnel_delta);
4215 /* Find client whom to allow to send to origin (with lowest buffer space) */
4216 for (i = 0; i < t->nclients; i++)
4218 struct MeshTunnelClientInfo *clinfo;
4221 clinfo = &t->clients_fc[i];
4222 delta = clinfo->bck_ack - clinfo->bck_pid;
4223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u delta: %u\n",
4224 t->clients[i]->id, delta);
4226 if ((GNUNET_NO == t->nobuffer && tunnel_delta > delta) ||
4227 (GNUNET_YES == t->nobuffer && 0 == delta))
4231 ack = clinfo->bck_pid;
4232 ack += t->nobuffer ? 1 : tunnel_delta;
4233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4234 " sending ack to client %u: %u\n",
4235 t->clients[i]->id, ack);
4236 send_local_ack (t, t->clients[i], ack);
4237 clinfo->bck_ack = ack;
4241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4242 " not sending ack to client %u (td %u, d %u)\n",
4243 t->clients[i]->id, tunnel_delta, delta);
4250 * Send an ACK informing the children nodes and destination clients about
4251 * the available buffer space.
4252 * If buffering is off, send only on behalf of root (can be self).
4253 * If buffering is on, send when sent to predecessor and buffer space is free.
4254 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
4255 * the ACK itself goes "forward" (towards children/clients).
4257 * @param t Tunnel on which to send the ACK.
4258 * @param type Type of message that triggered the ACK transmission.
4261 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
4263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4264 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
4265 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
4266 /* Is it after data to_origin retransmission? */
4269 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4270 if (GNUNET_YES == t->nobuffer)
4272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4273 " Not sending ACK, nobuffer\n");
4277 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4278 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
4280 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4281 t->force_ack = GNUNET_YES;
4287 tunnel_send_clients_bck_ack (t);
4288 tree_iterate_children (t->tree, &tunnel_send_child_bck_ack, t);
4289 t->force_ack = GNUNET_NO;
4294 * @brief Re-initiate traffic to this peer if necessary.
4296 * Check if there is traffic queued towards this peer
4297 * and the core transmit handle is NULL (traffic was stalled).
4298 * If so, call core tmt rdy.
4300 * @param cls Closure (unused)
4301 * @param peer_id Short ID of peer to which initiate traffic.
4304 peer_unlock_queue(void *cls, GNUNET_PEER_Id peer_id)
4306 struct MeshPeerInfo *peer;
4307 struct GNUNET_PeerIdentity id;
4308 struct MeshPeerQueue *q;
4311 peer = peer_info_get_short(peer_id);
4312 if (NULL != peer->core_transmit)
4315 q = queue_get_next(peer);
4318 /* Might br multicast traffic already sent to this particular peer but
4319 * not to other children in this tunnel.
4320 * This way t->queue_n would be > 0 but the queue of this particular peer
4326 GNUNET_PEER_resolve (peer->id, &id);
4327 peer->core_transmit =
4328 GNUNET_CORE_notify_transmit_ready(core_handle,
4331 GNUNET_TIME_UNIT_FOREVER_REL,
4341 * @brief Allow transmission of FWD traffic on this tunnel
4343 * Check if there is traffic queued towards any children
4344 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4346 * @param t Tunnel on which to unlock FWD traffic.
4349 tunnel_unlock_fwd_queues (struct MeshTunnel *t)
4351 if (0 == t->fwd_queue_n)
4354 tree_iterate_children (t->tree, &peer_unlock_queue, NULL);
4359 * @brief Allow transmission of BCK traffic on this tunnel
4361 * Check if there is traffic queued towards the root of the tree
4362 * and the core transmit handle is NULL, and if so, call core tmt rdy.
4364 * @param t Tunnel on which to unlock BCK traffic.
4367 tunnel_unlock_bck_queue (struct MeshTunnel *t)
4369 if (0 == t->bck_queue_n)
4372 peer_unlock_queue(NULL, tree_get_predecessor(t->tree));
4377 * Send a message to all peers in this tunnel that the tunnel is no longer
4380 * @param t The tunnel whose peers to notify.
4381 * @param send_back Do we need to notify our parent node?
4384 tunnel_send_destroy (struct MeshTunnel *t, int send_back)
4386 struct GNUNET_MESH_TunnelDestroy msg;
4387 struct GNUNET_PeerIdentity id;
4388 GNUNET_PEER_Id parent;
4390 if (tree_count_children(t->tree) > 0)
4392 msg.header.size = htons (sizeof (msg));
4393 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
4394 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
4395 msg.tid = htonl (t->id.tid);
4396 tunnel_send_multicast (t, &msg.header);
4398 parent = tree_get_predecessor(t->tree);
4399 if (GNUNET_NO == send_back || 0 == parent)
4402 msg.header.size = htons (sizeof (msg));
4403 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
4404 GNUNET_PEER_resolve (parent, &id);
4405 send_prebuilt_message(&msg.header, &id, t);
4410 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
4412 * @param cls Closure (Tunnel which to cancel).
4413 * @param neighbor_id Short ID of the neighbor to whom cancel the transmissions.
4416 tunnel_cancel_queues (void *cls, GNUNET_PEER_Id neighbor_id)
4418 struct MeshTunnel *t = cls;
4419 struct MeshPeerInfo *peer_info;
4420 struct MeshPeerQueue *pq;
4421 struct MeshPeerQueue *next;
4423 peer_info = peer_info_get_short (neighbor_id);
4424 for (pq = peer_info->queue_head; NULL != pq; pq = next)
4427 if (pq->tunnel == t)
4429 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST == pq->type ||
4430 GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
4431 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
4433 // Should have been removed on destroy children
4436 queue_destroy (pq, GNUNET_YES);
4439 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
4441 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
4442 peer_info->core_transmit = NULL;
4447 * Destroy the tunnel and free any allocated resources linked to it.
4449 * @param t the tunnel to destroy
4451 * @return GNUNET_OK on success
4454 tunnel_destroy (struct MeshTunnel *t)
4456 struct MeshClient *c;
4457 struct GNUNET_HashCode hash;
4468 struct GNUNET_PeerIdentity id;
4470 GNUNET_PEER_resolve (t->id.oid, &id);
4471 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
4472 GNUNET_i2s (&id), t->id.tid);
4474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4478 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4479 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
4487 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4489 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
4496 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
4497 for (i = 0; i < t->nclients; i++)
4501 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
4507 for (i = 0; i < t->nignore; i++)
4511 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
4518 (void) GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t);
4519 GNUNET_free_non_null (t->clients);
4520 GNUNET_free_non_null (t->clients_fc);
4522 if (NULL != t->peers)
4524 GNUNET_CONTAINER_multihashmap_iterate (t->peers, &peer_info_delete_tunnel,
4526 GNUNET_CONTAINER_multihashmap_destroy (t->peers);
4529 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
4530 &tunnel_destroy_child,
4532 GNUNET_CONTAINER_multihashmap_destroy (t->children_fc);
4533 t->children_fc = NULL;
4535 tree_iterate_children (t->tree, &tunnel_cancel_queues, t);
4536 tree_destroy (t->tree);
4538 if (NULL != t->regex_ctx)
4539 regex_cancel_search (t->regex_ctx);
4540 if (NULL != t->dht_get_type)
4541 GNUNET_DHT_get_stop (t->dht_get_type);
4542 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4543 GNUNET_SCHEDULER_cancel (t->timeout_task);
4544 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
4545 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
4548 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
4553 #define TUNNEL_DESTROY_EMPTY_TIME GNUNET_TIME_UNIT_MILLISECONDS
4556 * Tunnel is empty: destroy it.
4558 * @param cls Closure (Tunnel).
4559 * @param tc TaskContext.
4562 tunnel_destroy_empty_delayed (void *cls,
4563 const struct GNUNET_SCHEDULER_TaskContext *tc)
4565 struct MeshTunnel *t = cls;
4567 t->delayed_destroy = GNUNET_SCHEDULER_NO_TASK;
4568 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4571 if (0 != t->nclients ||
4572 0 != tree_count_children (t->tree))
4577 struct GNUNET_PeerIdentity id;
4579 GNUNET_PEER_resolve (t->id.oid, &id);
4580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4581 "executing destruction of empty tunnel %s [%X]\n",
4582 GNUNET_i2s (&id), t->id.tid);
4586 tunnel_send_destroy (t, GNUNET_YES);
4587 if (0 == t->pending_messages)
4590 t->destroy = GNUNET_YES;
4595 * Schedule tunnel destruction if is empty and no new traffic comes in a time.
4597 * @param t Tunnel to destroy if empty.
4600 tunnel_destroy_empty (struct MeshTunnel *t)
4602 if (GNUNET_SCHEDULER_NO_TASK != t->delayed_destroy ||
4604 0 != tree_count_children (t->tree))
4606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4608 t->delayed_destroy, t->nclients, tree_count_children(t->tree));
4614 struct GNUNET_PeerIdentity id;
4616 GNUNET_PEER_resolve (t->id.oid, &id);
4617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4618 "scheduling destruction of empty tunnel %s [%X]\n",
4619 GNUNET_i2s (&id), t->id.tid);
4623 t->delayed_destroy =
4624 GNUNET_SCHEDULER_add_delayed (TUNNEL_DESTROY_EMPTY_TIME,
4625 &tunnel_destroy_empty_delayed,
4631 * Create a new tunnel
4633 * @param owner Who is the owner of the tunnel (short ID).
4634 * @param tid Tunnel Number of the tunnel.
4635 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
4636 * @param local Tunnel Number for the tunnel, for the client point of view.
4638 * @return A new initialized tunnel. NULL on error.
4640 static struct MeshTunnel *
4641 tunnel_new (GNUNET_PEER_Id owner,
4642 MESH_TunnelNumber tid,
4643 struct MeshClient *client,
4644 MESH_TunnelNumber local)
4646 struct MeshTunnel *t;
4647 struct GNUNET_HashCode hash;
4649 if (n_tunnels >= max_tunnels && NULL == client)
4652 t = GNUNET_malloc (sizeof (struct MeshTunnel));
4655 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
4656 t->bck_queue_max = t->fwd_queue_max;
4657 t->tree = tree_new (owner);
4659 t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
4660 t->bck_pid = (uint32_t) -1; // Next (expected) = 0
4661 t->bck_ack = INITIAL_WINDOW_SIZE - 1;
4662 t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
4663 t->local_tid = local;
4664 t->children_fc = GNUNET_CONTAINER_multihashmap_create (8, GNUNET_NO);
4666 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
4668 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
4670 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
4671 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4678 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4685 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
4687 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
4688 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4692 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
4702 * Removes an explicit path from a tunnel, freeing all intermediate nodes
4703 * that are no longer needed, as well as nodes of no longer reachable peers.
4704 * The tunnel itself is also destoyed if results in a remote empty tunnel.
4706 * @param t Tunnel from which to remove the path.
4707 * @param peer Short id of the peer which should be removed.
4710 tunnel_delete_peer (struct MeshTunnel *t, GNUNET_PEER_Id peer)
4714 r = tree_del_peer (t->tree, peer, NULL, NULL);
4717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4718 "Tunnel %u [%u] has no more nodes\n",
4719 t->id.oid, t->id.tid);
4725 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
4726 * client when the client disconnects. If the client is not the owner, the
4727 * owner will get notified if no more clients are in the tunnel and the client
4728 * get removed from the tunnel's list.
4730 * @param cls closure (client that is disconnecting)
4731 * @param key the hash of the local tunnel id (used to access the hashmap)
4732 * @param value the value stored at the key (tunnel to destroy)
4734 * @return GNUNET_OK, keep iterating.
4737 tunnel_destroy_iterator (void *cls,
4738 const struct GNUNET_HashCode * key,
4741 struct MeshTunnel *t = value;
4742 struct MeshClient *c = cls;
4744 send_client_tunnel_disconnect (t, c);
4747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %u is destination.\n", c->id);
4748 tunnel_delete_client (t, c);
4749 client_delete_tunnel (c, t);
4750 tunnel_destroy_empty (t);
4753 tunnel_send_destroy (t, GNUNET_YES);
4755 t->destroy = GNUNET_YES;
4762 * Timeout function, destroys tunnel if called
4764 * @param cls Closure (tunnel to destroy).
4765 * @param tc TaskContext
4768 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4770 struct MeshTunnel *t = cls;
4771 struct GNUNET_PeerIdentity id;
4773 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
4774 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4776 GNUNET_PEER_resolve(t->id.oid, &id);
4777 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4778 "Tunnel %s [%X] timed out. Destroying.\n",
4779 GNUNET_i2s(&id), t->id.tid);
4780 send_clients_tunnel_destroy (t);
4785 * Resets the tunnel timeout. Starts it if no timeout was running.
4787 * @param t Tunnel whose timeout to reset.
4789 * TODO use heap to improve efficiency of scheduler.
4792 tunnel_reset_timeout (struct MeshTunnel *t)
4794 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
4795 GNUNET_SCHEDULER_cancel (t->timeout_task);
4797 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
4798 (refresh_path_time, 4), &tunnel_timeout, t);
4802 /******************************************************************************/
4803 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4804 /******************************************************************************/
4807 * Function to send a create path packet to a peer.
4809 * @param cls closure
4810 * @param size number of bytes available in buf
4811 * @param buf where the callee should write the message
4812 * @return number of bytes written to buf
4815 send_core_path_create (void *cls, size_t size, void *buf)
4817 struct MeshPathInfo *info = cls;
4818 struct GNUNET_MESH_ManipulatePath *msg;
4819 struct GNUNET_PeerIdentity *peer_ptr;
4820 struct MeshTunnel *t = info->t;
4821 struct MeshPeerPath *p = info->path;
4826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
4828 sizeof (struct GNUNET_MESH_ManipulatePath) +
4829 p->length * sizeof (struct GNUNET_PeerIdentity);
4831 if (size < size_needed || NULL == buf)
4836 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
4837 msg->header.size = htons (size_needed);
4838 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
4839 msg->tid = ntohl (t->id.tid);
4842 if (GNUNET_YES == t->speed_min)
4843 opt |= MESH_TUNNEL_OPT_SPEED_MIN;
4844 if (GNUNET_YES == t->nobuffer)
4845 opt |= MESH_TUNNEL_OPT_NOBUFFER;
4846 msg->opt = htonl(opt);
4849 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
4850 for (i = 0; i < p->length; i++)
4852 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
4858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4859 "CREATE PATH (%u bytes long) sent!\n", size_needed);
4865 * Fill the core buffer
4867 * @param cls closure (data itself)
4868 * @param size number of bytes available in buf
4869 * @param buf where the callee should write the message
4871 * @return number of bytes written to buf
4874 send_core_data_multicast (void *cls, size_t size, void *buf)
4876 struct MeshTransmissionDescriptor *info = cls;
4879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Multicast callback.\n");
4880 GNUNET_assert (NULL != info);
4881 GNUNET_assert (NULL != info->peer);
4882 total_size = info->mesh_data->data_len;
4883 GNUNET_assert (total_size < GNUNET_SERVER_MAX_MESSAGE_SIZE);
4885 if (total_size > size)
4890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " copying data...\n");
4891 memcpy (buf, info->mesh_data->data, total_size);
4894 struct GNUNET_MESH_Multicast *mc;
4895 struct GNUNET_MessageHeader *mh;
4898 if (ntohs (mh->type) == GNUNET_MESSAGE_TYPE_MESH_MULTICAST)
4900 mc = (struct GNUNET_MESH_Multicast *) mh;
4901 mh = (struct GNUNET_MessageHeader *) &mc[1];
4902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4903 " multicast, payload type %s\n",
4904 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4906 " multicast, payload size %u\n", ntohs (mh->size));
4910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type %s\n",
4911 GNUNET_MESH_DEBUG_M2S (ntohs (mh->type)));
4915 data_descriptor_decrement_rc (info->mesh_data);
4916 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "freeing info...\n");
4918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "return %u\n", total_size);
4924 * Creates a path ack message in buf and frees all unused resources.
4926 * @param cls closure (MeshTransmissionDescriptor)
4927 * @param size number of bytes available in buf
4928 * @param buf where the callee should write the message
4929 * @return number of bytes written to buf
4932 send_core_path_ack (void *cls, size_t size, void *buf)
4934 struct MeshTransmissionDescriptor *info = cls;
4935 struct GNUNET_MESH_PathACK *msg = buf;
4937 GNUNET_assert (NULL != info);
4938 if (sizeof (struct GNUNET_MESH_PathACK) > size)
4943 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
4944 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
4945 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
4946 msg->tid = htonl (info->origin->tid);
4947 msg->peer_id = my_full_id;
4950 /* TODO add signature */
4952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
4953 return sizeof (struct GNUNET_MESH_PathACK);
4958 * Free a transmission that was already queued with all resources
4959 * associated to the request.
4961 * @param queue Queue handler to cancel.
4962 * @param clear_cls Is it necessary to free associated cls?
4965 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4967 struct MeshTransmissionDescriptor *dd;
4968 struct MeshPathInfo *path_info;
4969 struct MeshTunnelChildInfo *cinfo;
4970 struct GNUNET_PeerIdentity id;
4974 if (GNUNET_YES == clear_cls)
4976 switch (queue->type)
4978 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
4979 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
4980 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
4982 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
4983 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
4984 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
4985 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4986 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4987 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
4988 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4989 " prebuilt message\n");
4990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4992 GNUNET_MESH_DEBUG_M2S(queue->type));
4994 data_descriptor_decrement_rc (dd->mesh_data);
4996 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
4997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
4998 path_info = queue->cls;
4999 path_destroy (path_info->path);
5003 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5004 " type %s unknown!\n",
5005 GNUNET_MESH_DEBUG_M2S(queue->type));
5007 GNUNET_free_non_null (queue->cls);
5009 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
5010 queue->peer->queue_tail,
5013 /* Delete from child_fc in the appropiate tunnel */
5014 max = queue->tunnel->fwd_queue_max;
5015 GNUNET_PEER_resolve (queue->peer->id, &id);
5016 cinfo = tunnel_get_neighbor_fc (queue->tunnel, &id);
5019 for (i = 0; i < cinfo->send_buffer_n; i++)
5022 i2 = (cinfo->send_buffer_start + i) % max;
5023 if (cinfo->send_buffer[i2] == queue)
5025 /* Found corresponding entry in the send_buffer. Move all others back. */
5030 for (j = i, j2 = 0, j3 = 0; j < cinfo->send_buffer_n - 1; j++)
5032 j2 = (cinfo->send_buffer_start + j) % max;
5033 j3 = (cinfo->send_buffer_start + j + 1) % max;
5034 cinfo->send_buffer[j2] = cinfo->send_buffer[j3];
5037 cinfo->send_buffer[j3] = NULL;
5038 cinfo->send_buffer_n--;
5043 GNUNET_free (queue);
5048 * @brief Get the next transmittable message from the queue.
5050 * This will be the head, except in the case of being a data packet
5051 * not allowed by the destination peer.
5053 * @param peer Destination peer.
5055 * @return The next viable MeshPeerQueue element to send to that peer.
5056 * NULL when there are no transmittable messages.
5058 struct MeshPeerQueue *
5059 queue_get_next (const struct MeshPeerInfo *peer)
5061 struct MeshPeerQueue *q;
5062 struct MeshTunnel *t;
5063 struct MeshTransmissionDescriptor *info;
5064 struct MeshTunnelChildInfo *cinfo;
5065 struct GNUNET_MESH_Unicast *ucast;
5066 struct GNUNET_MESH_ToOrigin *to_orig;
5067 struct GNUNET_MESH_Multicast *mcast;
5068 struct GNUNET_PeerIdentity id;
5072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
5073 for (q = peer->queue_head; NULL != q; q = q->next)
5077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5079 GNUNET_MESH_DEBUG_M2S(q->type));
5082 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5083 ucast = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
5084 pid = ntohl (ucast->pid);
5085 GNUNET_PEER_resolve (info->peer->id, &id);
5086 cinfo = tunnel_get_neighbor_fc(t, &id);
5087 ack = cinfo->fwd_ack;
5089 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5090 to_orig = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
5091 pid = ntohl (to_orig->pid);
5094 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
5095 mcast = (struct GNUNET_MESH_Multicast *) info->mesh_data->data;
5096 if (GNUNET_MESSAGE_TYPE_MESH_MULTICAST != ntohs(mcast->header.type))
5098 // Not a multicast payload: multicast control traffic (destroy, etc)
5101 pid = ntohl (mcast->pid);
5102 GNUNET_PEER_resolve (info->peer->id, &id);
5103 cinfo = tunnel_get_neighbor_fc(t, &id);
5104 ack = cinfo->fwd_ack;
5107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5112 "********* ACK: %u, PID: %u\n",
5114 if (GNUNET_NO == GMC_is_pid_bigger(pid, ack))
5116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5123 "********* NEXT!\n");
5126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5127 "********* nothing found\n");
5133 * Core callback to write a queued packet to core buffer
5135 * @param cls Closure (peer info).
5136 * @param size Number of bytes available in buf.
5137 * @param buf Where the to write the message.
5139 * @return number of bytes written to buf
5142 queue_send (void *cls, size_t size, void *buf)
5144 struct MeshPeerInfo *peer = cls;
5145 struct GNUNET_MessageHeader *msg;
5146 struct MeshPeerQueue *queue;
5147 struct MeshTunnel *t;
5148 struct MeshTunnelChildInfo *cinfo;
5149 struct GNUNET_PeerIdentity dst_id;
5152 peer->core_transmit = NULL;
5155 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
5156 queue = queue_get_next (peer);
5158 /* Queue has no internal mesh traffic nor sendable payload */
5161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
5162 if (NULL == peer->queue_head)
5163 GNUNET_break (0); // Should've been canceled
5166 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
5168 GNUNET_PEER_resolve (peer->id, &dst_id);
5169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5170 "********* towards %s\n",
5171 GNUNET_i2s(&dst_id));
5172 /* Check if buffer size is enough for the message */
5173 if (queue->size > size)
5175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5176 "********* not enough room, reissue\n");
5177 peer->core_transmit =
5178 GNUNET_CORE_notify_transmit_ready (core_handle,
5181 GNUNET_TIME_UNIT_FOREVER_REL,
5188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
5191 GNUNET_assert (0 < t->pending_messages);
5192 t->pending_messages--;
5193 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
5196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5197 "********* unicast: t->q (%u/%u)\n",
5198 t->fwd_queue_n, t->fwd_queue_max);
5200 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
5203 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
5207 switch (queue->type)
5210 case GNUNET_MESSAGE_TYPE_MESH_ACK:
5211 case GNUNET_MESSAGE_TYPE_MESH_POLL:
5212 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
5213 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
5214 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
5215 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5216 "********* raw: %s\n",
5217 GNUNET_MESH_DEBUG_M2S (queue->type));
5219 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5220 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5221 data_size = send_core_data_raw (queue->cls, size, buf);
5222 msg = (struct GNUNET_MessageHeader *) buf;
5223 switch (ntohs (msg->type)) // Type of preconstructed message
5225 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5226 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5228 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5229 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5235 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
5236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* multicast\n");
5238 struct MeshTransmissionDescriptor *info = queue->cls;
5240 if ((1 == info->mesh_data->reference_counter
5241 && GNUNET_YES == t->speed_min)
5243 (info->mesh_data->total_out == info->mesh_data->reference_counter
5244 && GNUNET_NO == t->speed_min))
5246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5247 "********* considered sent\n");
5252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5253 "********* NOT considered sent yet\n");
5254 t->pending_messages++;
5257 data_size = send_core_data_multicast(queue->cls, size, buf);
5258 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
5260 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
5261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
5262 data_size = send_core_path_create (queue->cls, size, buf);
5264 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
5265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
5266 data_size = send_core_path_ack (queue->cls, size, buf);
5268 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
5269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path keepalive\n");
5270 data_size = send_core_data_multicast (queue->cls, size, buf);
5274 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5275 "********* type unknown: %u\n",
5279 switch (queue->type)
5281 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
5282 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
5283 case GNUNET_MESSAGE_TYPE_MESH_MULTICAST:
5284 cinfo = tunnel_get_neighbor_fc (t, &dst_id);
5285 if (cinfo->send_buffer[cinfo->send_buffer_start] != queue)
5288 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5289 "at pos %u (%p) != %p\n",
5290 cinfo->send_buffer_start,
5291 cinfo->send_buffer[cinfo->send_buffer_start],
5294 if (cinfo->send_buffer_n > 0)
5296 cinfo->send_buffer[cinfo->send_buffer_start] = NULL;
5297 cinfo->send_buffer_n--;
5298 cinfo->send_buffer_start++;
5299 cinfo->send_buffer_start %= t->fwd_queue_max;
5310 /* Free queue, but cls was freed by send_core_* */
5311 queue_destroy (queue, GNUNET_NO);
5313 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
5315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
5319 /* If more data in queue, send next */
5320 queue = queue_get_next(peer);
5323 struct GNUNET_PeerIdentity id;
5325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
5326 GNUNET_PEER_resolve (peer->id, &id);
5327 peer->core_transmit =
5328 GNUNET_CORE_notify_transmit_ready(core_handle,
5331 GNUNET_TIME_UNIT_FOREVER_REL,
5339 if (NULL != peer->queue_head)
5341 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5342 "********* %s stalled\n",
5343 GNUNET_i2s(&my_full_id));
5345 cinfo = tunnel_get_neighbor_fc (t, &dst_id);
5346 // FIXME unify bck/fwd structures, bck does not have cinfo right now
5347 if (NULL != cinfo && GNUNET_SCHEDULER_NO_TASK == cinfo->fc_poll)
5349 cinfo->fc_poll = GNUNET_SCHEDULER_add_delayed (cinfo->fc_poll_time,
5350 &tunnel_poll, cinfo);
5354 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
5360 * @brief Queue and pass message to core when possible.
5362 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
5363 * and accounts for it. In case the queue is full, the message is dropped and
5366 * Otherwise, message is treated as internal and allowed to go regardless of
5369 * @param cls Closure (@c type dependant). It will be used by queue_send to
5370 * build the message to be sent if not already prebuilt.
5371 * @param type Type of the message, 0 for a raw message.
5372 * @param size Size of the message.
5373 * @param dst Neighbor to send message to.
5374 * @param t Tunnel this message belongs to.
5377 queue_add (void *cls, uint16_t type, size_t size,
5378 struct MeshPeerInfo *dst, struct MeshTunnel *t)
5380 struct MeshPeerQueue *queue;
5381 struct MeshTunnelChildInfo *cinfo;
5382 struct GNUNET_PeerIdentity id;
5388 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
5389 GNUNET_MESSAGE_TYPE_MESH_MULTICAST == type)
5391 n = &t->fwd_queue_n;
5392 max = &t->fwd_queue_max;
5394 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
5396 n = &t->bck_queue_n;
5397 max = &t->bck_queue_max;
5404 GNUNET_STATISTICS_update(stats,
5405 "# messages dropped (buffer full)",
5407 return; // Drop message
5411 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
5417 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
5418 GNUNET_PEER_resolve (dst->id, &id);
5419 if (NULL == dst->core_transmit)
5421 dst->core_transmit =
5422 GNUNET_CORE_notify_transmit_ready (core_handle,
5425 GNUNET_TIME_UNIT_FOREVER_REL,
5431 t->pending_messages++;
5432 if (NULL == n) // Is this internal mesh traffic?
5435 // It's payload, keep track of buffer per peer.
5436 cinfo = tunnel_get_neighbor_fc(t, &id);
5437 i = (cinfo->send_buffer_start + cinfo->send_buffer_n) % t->fwd_queue_max;
5438 if (NULL != cinfo->send_buffer[i])
5440 GNUNET_break (cinfo->send_buffer_n == t->fwd_queue_max); // aka i == start
5441 queue_destroy (cinfo->send_buffer[cinfo->send_buffer_start], GNUNET_YES);
5442 cinfo->send_buffer_start++;
5443 cinfo->send_buffer_start %= t->fwd_queue_max;
5447 cinfo->send_buffer_n++;
5449 cinfo->send_buffer[i] = queue;
5450 if (cinfo->send_buffer_n > t->fwd_queue_max)
5453 cinfo->send_buffer_n = t->fwd_queue_max;
5458 /******************************************************************************/
5459 /******************** MESH NETWORK HANDLERS **************************/
5460 /******************************************************************************/
5464 * Core handler for path creation
5466 * @param cls closure
5467 * @param message message
5468 * @param peer peer identity this notification is about
5469 * @param atsi performance data
5470 * @param atsi_count number of records in 'atsi'
5472 * @return GNUNET_OK to keep the connection open,
5473 * GNUNET_SYSERR to close it (signal serious error)
5476 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
5477 const struct GNUNET_MessageHeader *message,
5478 const struct GNUNET_ATS_Information *atsi,
5479 unsigned int atsi_count)
5481 unsigned int own_pos;
5484 MESH_TunnelNumber tid;
5485 struct GNUNET_MESH_ManipulatePath *msg;
5486 struct GNUNET_PeerIdentity *pi;
5487 struct GNUNET_HashCode hash;
5488 struct MeshPeerPath *path;
5489 struct MeshPeerInfo *dest_peer_info;
5490 struct MeshPeerInfo *orig_peer_info;
5491 struct MeshTunnel *t;
5493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5494 "Received a path create msg [%s]\n",
5495 GNUNET_i2s (&my_full_id));
5496 size = ntohs (message->size);
5497 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5499 GNUNET_break_op (0);
5503 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5504 if (size % sizeof (struct GNUNET_PeerIdentity))
5506 GNUNET_break_op (0);
5509 size /= sizeof (struct GNUNET_PeerIdentity);
5512 GNUNET_break_op (0);
5515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5516 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5518 tid = ntohl (msg->tid);
5519 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5521 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
5522 t = tunnel_get (pi, tid);
5523 if (NULL == t) // FIXME only for INCOMING tunnels?
5527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
5528 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
5531 // FIXME notify failure
5534 opt = ntohl (msg->opt);
5535 t->speed_min = (0 != (opt & MESH_TUNNEL_OPT_SPEED_MIN)) ?
5536 GNUNET_YES : GNUNET_NO;
5537 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
5539 t->nobuffer = GNUNET_YES;
5540 t->last_fwd_ack = t->fwd_pid + 1;
5542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5543 " speed_min: %d, nobuffer:%d\n",
5544 t->speed_min, t->nobuffer);
5546 if (GNUNET_YES == t->nobuffer)
5548 t->bck_queue_max = 1;
5549 t->fwd_queue_max = 1;
5552 // FIXME only assign a local tid if a local client is interested (on demand)
5553 while (NULL != tunnel_get_incoming (next_local_tid))
5554 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5555 t->local_tid_dest = next_local_tid++;
5556 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5559 tunnel_reset_timeout (t);
5560 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
5562 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
5563 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
5571 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
5572 if (NULL == dest_peer_info)
5574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5575 " Creating PeerInfo for destination.\n");
5576 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5577 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
5578 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
5580 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5582 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
5583 if (NULL == orig_peer_info)
5585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5586 " Creating PeerInfo for origin.\n");
5587 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
5588 orig_peer_info->id = GNUNET_PEER_intern (pi);
5589 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
5590 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
5592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5593 path = path_new (size);
5595 for (i = 0; i < size; i++)
5597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5598 GNUNET_i2s (&pi[i]));
5599 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5600 if (path->peers[i] == myid)
5603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5606 /* cannot be self, must be 'not found' */
5607 /* create path: self not found in path through self */
5608 GNUNET_break_op (0);
5609 path_destroy (path);
5613 path_add_to_peers (path, GNUNET_NO);
5614 tunnel_add_path (t, path, own_pos);
5615 if (own_pos == size - 1)
5617 /* It is for us! Send ack. */
5618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5619 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
5620 if (NULL == t->peers)
5622 /* New tunnel! Notify clients on first payload message. */
5623 t->peers = GNUNET_CONTAINER_multihashmap_create (4, GNUNET_NO);
5625 GNUNET_break (GNUNET_SYSERR !=
5626 GNUNET_CONTAINER_multihashmap_put (t->peers,
5627 &my_full_id.hashPubKey,
5630 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE));
5635 struct MeshPeerPath *path2;
5637 /* It's for somebody else! Retransmit. */
5638 path2 = path_duplicate (path);
5639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
5640 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
5641 path2 = path_duplicate (path);
5642 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
5643 send_create_path (dest_peer_info, path, t);
5650 * Core handler for path destruction
5652 * @param cls closure
5653 * @param message message
5654 * @param peer peer identity this notification is about
5655 * @param atsi performance data
5656 * @param atsi_count number of records in 'atsi'
5658 * @return GNUNET_OK to keep the connection open,
5659 * GNUNET_SYSERR to close it (signal serious error)
5662 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5663 const struct GNUNET_MessageHeader *message,
5664 const struct GNUNET_ATS_Information *atsi,
5665 unsigned int atsi_count)
5667 struct GNUNET_MESH_ManipulatePath *msg;
5668 struct GNUNET_PeerIdentity *pi;
5669 struct MeshPeerPath *path;
5670 struct MeshTunnel *t;
5671 unsigned int own_pos;
5675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5676 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
5677 size = ntohs (message->size);
5678 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
5680 GNUNET_break_op (0);
5684 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
5685 if (size % sizeof (struct GNUNET_PeerIdentity))
5687 GNUNET_break_op (0);
5690 size /= sizeof (struct GNUNET_PeerIdentity);
5693 GNUNET_break_op (0);
5696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5698 msg = (struct GNUNET_MESH_ManipulatePath *) message;
5699 pi = (struct GNUNET_PeerIdentity *) &msg[1];
5700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5701 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
5703 t = tunnel_get (pi, ntohl (msg->tid));
5706 /* TODO notify back: we don't know this tunnel */
5707 GNUNET_break_op (0);
5710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5711 path = path_new (size);
5713 for (i = 0; i < size; i++)
5715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5716 GNUNET_i2s (&pi[i]));
5717 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
5718 if (path->peers[i] == myid)
5721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5722 if (own_pos < path->length - 1)
5723 send_prebuilt_message (message, &pi[own_pos + 1], t);
5725 send_client_tunnel_disconnect(t, NULL);
5727 tunnel_delete_peer (t, path->peers[path->length - 1]);
5728 path_destroy (path);
5734 * Core handler for notifications of broken paths
5736 * @param cls closure
5737 * @param message message
5738 * @param peer peer identity this notification is about
5739 * @param atsi performance data
5740 * @param atsi_count number of records in 'atsi'
5742 * @return GNUNET_OK to keep the connection open,
5743 * GNUNET_SYSERR to close it (signal serious error)
5746 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
5747 const struct GNUNET_MessageHeader *message,
5748 const struct GNUNET_ATS_Information *atsi,
5749 unsigned int atsi_count)
5751 struct GNUNET_MESH_PathBroken *msg;
5752 struct MeshTunnel *t;
5754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5755 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
5756 msg = (struct GNUNET_MESH_PathBroken *) message;
5757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5758 GNUNET_i2s (&msg->peer1));
5759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5760 GNUNET_i2s (&msg->peer2));
5761 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5764 GNUNET_break_op (0);
5767 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
5768 GNUNET_PEER_search (&msg->peer2));
5775 * Core handler for tunnel destruction
5777 * @param cls closure
5778 * @param message message
5779 * @param peer peer identity this notification is about
5780 * @param atsi performance data
5781 * @param atsi_count number of records in 'atsi'
5783 * @return GNUNET_OK to keep the connection open,
5784 * GNUNET_SYSERR to close it (signal serious error)
5787 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
5788 const struct GNUNET_MessageHeader *message,
5789 const struct GNUNET_ATS_Information *atsi,
5790 unsigned int atsi_count)
5792 struct GNUNET_MESH_TunnelDestroy *msg;
5793 struct MeshTunnel *t;
5795 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
5796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5797 "Got a TUNNEL DESTROY packet from %s\n",
5799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5800 " for tunnel %s [%u]\n",
5801 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
5802 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5805 /* Probably already got the message from another path,
5806 * destroyed the tunnel and retransmitted to children.
5809 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
5813 if (t->id.oid == myid)
5815 GNUNET_break_op (0);
5818 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5820 /* Tunnel was incoming, notify clients */
5821 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
5822 t->local_tid, t->local_tid_dest);
5823 send_clients_tunnel_destroy (t);
5825 tunnel_send_destroy (t, GNUNET_YES);
5826 t->destroy = GNUNET_YES;
5827 // TODO: add timeout to destroy the tunnel anyway
5833 * Core handler for mesh network traffic going from the origin to a peer
5835 * @param cls closure
5836 * @param peer peer identity this notification is about
5837 * @param message message
5838 * @param atsi performance data
5839 * @param atsi_count number of records in 'atsi'
5840 * @return GNUNET_OK to keep the connection open,
5841 * GNUNET_SYSERR to close it (signal serious error)
5844 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5845 const struct GNUNET_MessageHeader *message,
5846 const struct GNUNET_ATS_Information *atsi,
5847 unsigned int atsi_count)
5849 struct GNUNET_MESH_Unicast *msg;
5850 struct GNUNET_PeerIdentity *neighbor;
5851 struct MeshTunnelChildInfo *cinfo;
5852 struct MeshTunnel *t;
5853 GNUNET_PEER_Id dest_id;
5858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
5861 size = ntohs (message->size);
5863 sizeof (struct GNUNET_MESH_Unicast) +
5864 sizeof (struct GNUNET_MessageHeader))
5869 msg = (struct GNUNET_MESH_Unicast *) message;
5870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
5871 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5873 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5876 /* TODO notify back: we don't know this tunnel */
5877 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5878 GNUNET_break_op (0);
5881 pid = ntohl (msg->pid);
5882 if (t->fwd_pid == pid)
5884 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5885 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5886 " Already seen pid %u, DROPPING!\n", pid);
5891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5892 " pid %u not seen yet, forwarding\n", pid);
5895 t->skip += (pid - t->fwd_pid) - 1;
5898 if (GMC_is_pid_bigger (pid, t->last_fwd_ack))
5900 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5901 GNUNET_break_op (0);
5902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5903 "Received PID %u, ACK %u\n",
5904 pid, t->last_fwd_ack);
5908 tunnel_reset_timeout (t);
5909 dest_id = GNUNET_PEER_search (&msg->destination);
5910 if (dest_id == myid)
5912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5913 " it's for us! sending to clients...\n");
5914 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
5915 send_subscribed_clients (message, &msg[1].header, t);
5916 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
5919 ttl = ntohl (msg->ttl);
5920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5923 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5924 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5925 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
5928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5929 " not for us, retransmitting...\n");
5931 neighbor = tree_get_first_hop (t->tree, dest_id);
5932 cinfo = tunnel_get_neighbor_fc (t, neighbor);
5933 cinfo->fwd_pid = pid;
5934 GNUNET_CONTAINER_multihashmap_iterate (t->children_fc,
5937 if (GNUNET_YES == t->nobuffer &&
5938 GNUNET_YES == GMC_is_pid_bigger (pid, cinfo->fwd_ack))
5940 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
5941 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " %u > %u\n", pid, cinfo->fwd_ack);
5942 GNUNET_break_op (0);
5945 send_prebuilt_message (message, neighbor, t);
5946 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
5952 * Core handler for mesh network traffic going from the origin to all peers
5954 * @param cls closure
5955 * @param message message
5956 * @param peer peer identity this notification is about
5957 * @param atsi performance data
5958 * @param atsi_count number of records in 'atsi'
5959 * @return GNUNET_OK to keep the connection open,
5960 * GNUNET_SYSERR to close it (signal serious error)
5962 * TODO: Check who we got this from, to validate route.
5965 handle_mesh_data_multicast (void *cls, const struct GNUNET_PeerIdentity *peer,
5966 const struct GNUNET_MessageHeader *message,
5967 const struct GNUNET_ATS_Information *atsi,
5968 unsigned int atsi_count)
5970 struct GNUNET_MESH_Multicast *msg;
5971 struct MeshTunnel *t;
5975 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a multicast packet from %s\n",
5977 size = ntohs (message->size);
5978 if (sizeof (struct GNUNET_MESH_Multicast) +
5979 sizeof (struct GNUNET_MessageHeader) > size)
5981 GNUNET_break_op (0);
5984 msg = (struct GNUNET_MESH_Multicast *) message;
5985 t = tunnel_get (&msg->oid, ntohl (msg->tid));
5989 /* TODO notify that we dont know that tunnel */
5990 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
5991 GNUNET_break_op (0);
5994 pid = ntohl (msg->pid);
5995 if (t->fwd_pid == pid)
5997 /* already seen this packet, drop */
5998 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
5999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6000 " Already seen pid %u, DROPPING!\n", pid);
6001 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
6006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6007 " pid %u not seen yet, forwarding\n", pid);
6009 t->skip += (pid - t->fwd_pid) - 1;
6011 tunnel_reset_timeout (t);
6013 /* Transmit to locally interested clients */
6014 if (NULL != t->peers &&
6015 GNUNET_CONTAINER_multihashmap_contains (t->peers, &my_full_id.hashPubKey))
6017 GNUNET_STATISTICS_update (stats, "# multicast received", 1, GNUNET_NO);
6018 send_subscribed_clients (message, &msg[1].header, t);
6019 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_MULTICAST);
6021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ntohl (msg->ttl));
6022 if (ntohl (msg->ttl) == 0)
6024 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
6025 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
6026 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
6029 GNUNET_STATISTICS_update (stats, "# multicast forwarded", 1, GNUNET_NO);
6030 tunnel_send_multicast (t, message);
6036 * Core handler for mesh network traffic toward the owner of a tunnel
6038 * @param cls closure
6039 * @param message message
6040 * @param peer peer identity this notification is about
6041 * @param atsi performance data
6042 * @param atsi_count number of records in 'atsi'
6044 * @return GNUNET_OK to keep the connection open,
6045 * GNUNET_SYSERR to close it (signal serious error)
6048 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
6049 const struct GNUNET_MessageHeader *message,
6050 const struct GNUNET_ATS_Information *atsi,
6051 unsigned int atsi_count)
6053 struct GNUNET_MESH_ToOrigin *msg;
6054 struct GNUNET_PeerIdentity id;
6055 struct MeshPeerInfo *peer_info;
6056 struct MeshTunnel *t;
6057 struct MeshTunnelChildInfo *cinfo;
6058 GNUNET_PEER_Id predecessor;
6062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
6064 size = ntohs (message->size);
6065 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
6066 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
6068 GNUNET_break_op (0);
6071 msg = (struct GNUNET_MESH_ToOrigin *) message;
6072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
6073 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
6074 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6075 pid = ntohl (msg->pid);
6079 /* TODO notify that we dont know this tunnel (whom)? */
6080 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
6081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6082 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
6083 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
6087 cinfo = tunnel_get_neighbor_fc(t, peer);
6094 if (cinfo->bck_pid == pid)
6096 /* already seen this packet, drop */
6097 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
6098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6099 " Already seen pid %u, DROPPING!\n", pid);
6100 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
6104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6105 " pid %u not seen yet, forwarding\n", pid);
6106 cinfo->bck_pid = pid;
6108 if (NULL != t->owner)
6111 struct GNUNET_MESH_ToOrigin *copy;
6113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6114 " it's for us! sending to clients...\n");
6115 /* TODO signature verification */
6116 memcpy (cbuf, message, size);
6117 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
6118 copy->tid = htonl (t->local_tid);
6120 copy->pid = htonl (t->bck_pid);
6121 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
6122 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
6123 ©->header, GNUNET_NO);
6124 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
6127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6128 " not for us, retransmitting...\n");
6130 peer_info = peer_info_get (&msg->oid);
6131 if (NULL == peer_info)
6133 /* unknown origin of tunnel */
6137 predecessor = tree_get_predecessor (t->tree);
6138 if (0 == predecessor)
6140 if (GNUNET_YES == t->destroy)
6142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6143 "to orig received on a dying tunnel %s [%X]\n",
6144 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
6147 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6148 "unknown to origin at %s\n",
6149 GNUNET_i2s (&my_full_id));
6150 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6153 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6154 "for tunnel %s [%X]\n",
6155 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
6156 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6158 tree_debug (t->tree);
6161 GNUNET_PEER_resolve (predecessor, &id);
6162 send_prebuilt_message (message, &id, t);
6163 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
6170 * Core handler for mesh network traffic point-to-point acks.
6172 * @param cls closure
6173 * @param message message
6174 * @param peer peer identity this notification is about
6175 * @param atsi performance data
6176 * @param atsi_count number of records in 'atsi'
6178 * @return GNUNET_OK to keep the connection open,
6179 * GNUNET_SYSERR to close it (signal serious error)
6182 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
6183 const struct GNUNET_MessageHeader *message,
6184 const struct GNUNET_ATS_Information *atsi,
6185 unsigned int atsi_count)
6187 struct GNUNET_MESH_ACK *msg;
6188 struct MeshTunnel *t;
6191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
6193 msg = (struct GNUNET_MESH_ACK *) message;
6195 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6199 /* TODO notify that we dont know this tunnel (whom)? */
6200 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
6203 ack = ntohl (msg->pid);
6204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
6206 /* Is this a forward or backward ACK? */
6207 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
6209 struct MeshTunnelChildInfo *cinfo;
6212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
6213 cinfo = tunnel_get_neighbor_fc (t, peer);
6214 cinfo->fwd_ack = ack;
6215 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
6216 tunnel_unlock_fwd_queues (t);
6217 if (GNUNET_SCHEDULER_NO_TASK != cinfo->fc_poll)
6219 GNUNET_SCHEDULER_cancel (cinfo->fc_poll);
6220 cinfo->fc_poll = GNUNET_SCHEDULER_NO_TASK;
6221 cinfo->fc_poll_time = GNUNET_TIME_UNIT_SECONDS;
6226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
6228 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
6229 tunnel_unlock_bck_queue (t);
6236 * Core handler for mesh network traffic point-to-point ack polls.
6238 * @param cls closure
6239 * @param message message
6240 * @param peer peer identity this notification is about
6241 * @param atsi performance data
6242 * @param atsi_count number of records in 'atsi'
6244 * @return GNUNET_OK to keep the connection open,
6245 * GNUNET_SYSERR to close it (signal serious error)
6248 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
6249 const struct GNUNET_MessageHeader *message,
6250 const struct GNUNET_ATS_Information *atsi,
6251 unsigned int atsi_count)
6253 struct GNUNET_MESH_Poll *msg;
6254 struct MeshTunnel *t;
6256 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
6259 msg = (struct GNUNET_MESH_Poll *) message;
6261 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6265 /* TODO notify that we dont know this tunnel (whom)? */
6266 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
6267 GNUNET_break_op (0);
6271 /* Is this a forward or backward ACK? */
6272 if (tree_get_predecessor(t->tree) != GNUNET_PEER_search(peer))
6274 struct MeshTunnelChildInfo *cinfo;
6276 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
6277 cinfo = tunnel_get_neighbor_fc (t, peer);
6278 cinfo->bck_ack = cinfo->fwd_pid; // mark as ready to send
6279 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
6283 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
6284 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
6292 * Core handler for path ACKs
6294 * @param cls closure
6295 * @param message message
6296 * @param peer peer identity this notification is about
6297 * @param atsi performance data
6298 * @param atsi_count number of records in 'atsi'
6300 * @return GNUNET_OK to keep the connection open,
6301 * GNUNET_SYSERR to close it (signal serious error)
6304 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
6305 const struct GNUNET_MessageHeader *message,
6306 const struct GNUNET_ATS_Information *atsi,
6307 unsigned int atsi_count)
6309 struct GNUNET_MESH_PathACK *msg;
6310 struct GNUNET_PeerIdentity id;
6311 struct MeshPeerInfo *peer_info;
6312 struct MeshPeerPath *p;
6313 struct MeshTunnel *t;
6315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
6316 GNUNET_i2s (&my_full_id));
6317 msg = (struct GNUNET_MESH_PathACK *) message;
6318 t = tunnel_get (&msg->oid, ntohl(msg->tid));
6321 /* TODO notify that we don't know the tunnel */
6322 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
6323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
6324 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
6327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
6328 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
6330 peer_info = peer_info_get (&msg->peer_id);
6331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
6332 GNUNET_i2s (&msg->peer_id));
6333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
6336 if (NULL != t->regex_ctx && t->regex_ctx->info->peer == peer_info->id)
6338 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6339 "connect_by_string completed, stopping search\n");
6340 regex_cancel_search (t->regex_ctx);
6341 t->regex_ctx = NULL;
6344 /* Add paths to peers? */
6345 p = tree_get_path_to_peer (t->tree, peer_info->id);
6348 path_add_to_peers (p, GNUNET_YES);
6356 /* Message for us? */
6357 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
6359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
6360 if (NULL == t->owner)
6362 GNUNET_break_op (0);
6365 if (NULL != t->dht_get_type)
6367 GNUNET_DHT_get_stop (t->dht_get_type);
6368 t->dht_get_type = NULL;
6370 if (tree_get_status (t->tree, peer_info->id) != MESH_PEER_READY)
6372 tree_set_status (t->tree, peer_info->id, MESH_PEER_READY);
6373 send_client_peer_connected (t, peer_info->id);
6378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6379 " not for us, retransmitting...\n");
6380 GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &id);
6381 peer_info = peer_info_get (&msg->oid);
6382 if (NULL == peer_info)
6384 /* If we know the tunnel, we should DEFINITELY know the peer */
6388 send_prebuilt_message (message, &id, t);
6394 * Core handler for mesh keepalives.
6396 * @param cls closure
6397 * @param message message
6398 * @param peer peer identity this notification is about
6399 * @param atsi performance data
6400 * @param atsi_count number of records in 'atsi'
6401 * @return GNUNET_OK to keep the connection open,
6402 * GNUNET_SYSERR to close it (signal serious error)
6404 * TODO: Check who we got this from, to validate route.
6407 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
6408 const struct GNUNET_MessageHeader *message,
6409 const struct GNUNET_ATS_Information *atsi,
6410 unsigned int atsi_count)
6412 struct GNUNET_MESH_TunnelKeepAlive *msg;
6413 struct MeshTunnel *t;
6415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
6418 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
6419 t = tunnel_get (&msg->oid, ntohl (msg->tid));
6423 /* TODO notify that we dont know that tunnel */
6424 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
6429 tunnel_reset_timeout (t);
6431 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
6432 tunnel_send_multicast (t, message);
6439 * Functions to handle messages from core
6441 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
6442 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
6443 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
6444 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
6445 sizeof (struct GNUNET_MESH_PathBroken)},
6446 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
6447 sizeof (struct GNUNET_MESH_TunnelDestroy)},
6448 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
6449 {&handle_mesh_data_multicast, GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
6450 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
6451 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
6452 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
6453 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
6454 sizeof (struct GNUNET_MESH_ACK)},
6455 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
6456 sizeof (struct GNUNET_MESH_Poll)},
6457 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
6458 sizeof (struct GNUNET_MESH_PathACK)},
6464 /******************************************************************************/
6465 /**************** MESH LOCAL HANDLER HELPERS ***********************/
6466 /******************************************************************************/
6469 * deregister_app: iterator for removing each application registered by a client
6471 * @param cls closure
6472 * @param key the hash of the application id (used to access the hashmap)
6473 * @param value the value stored at the key (client)
6475 * @return GNUNET_OK on success
6478 deregister_app (void *cls, const struct GNUNET_HashCode * key, void *value)
6480 struct GNUNET_CONTAINER_MultiHashMap *h = cls;
6481 GNUNET_break (GNUNET_YES ==
6482 GNUNET_CONTAINER_multihashmap_remove (h, key, value));
6488 * notify_client_connection_failure: notify a client that the connection to the
6489 * requested remote peer is not possible (for instance, no route found)
6490 * Function called when the socket is ready to queue more data. "buf" will be
6491 * NULL and "size" zero if the socket was closed for writing in the meantime.
6493 * @param cls closure
6494 * @param size number of bytes available in buf
6495 * @param buf where the callee should write the message
6496 * @return number of bytes written to buf
6499 notify_client_connection_failure (void *cls, size_t size, void *buf)
6502 struct MeshPeerInfo *peer_info;
6503 struct GNUNET_MESH_PeerControl *msg;
6504 struct GNUNET_PeerIdentity id;
6506 if (0 == size && NULL == buf)
6508 // TODO retry? cancel?
6512 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
6513 peer_info = (struct MeshPeerInfo *) cls;
6514 msg = (struct GNUNET_MESH_PeerControl *) buf;
6515 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
6516 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
6517 // msg->tunnel_id = htonl(peer_info->t->tid);
6518 GNUNET_PEER_resolve (peer_info->id, &id);
6519 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
6527 * Send keepalive packets for a peer
6529 * @param cls Closure (tunnel for which to send the keepalive).
6530 * @param tc Notification context.
6533 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
6535 struct MeshTunnel *t = cls;
6536 struct GNUNET_MESH_TunnelKeepAlive *msg;
6537 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
6540 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
6541 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
6546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6547 "sending keepalive for tunnel %d\n", t->id.tid);
6549 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
6550 msg->header.size = htons (size);
6551 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
6552 msg->oid = my_full_id;
6553 msg->tid = htonl (t->id.tid);
6554 tunnel_send_multicast (t, &msg->header);
6556 t->path_refresh_task =
6557 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
6558 tunnel_reset_timeout(t);
6563 * Function to process paths received for a new peer addition. The recorded
6564 * paths form the initial tunnel, which can be optimized later.
6565 * Called on each result obtained for the DHT search.
6567 * @param cls closure
6568 * @param exp when will this value expire
6569 * @param key key of the result
6570 * @param get_path path of the get request
6571 * @param get_path_length lenght of get_path
6572 * @param put_path path of the put request
6573 * @param put_path_length length of the put_path
6574 * @param type type of the result
6575 * @param size number of bytes in data
6576 * @param data pointer to the result data
6578 * TODO: re-issue the request after certain time? cancel after X results?
6581 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6582 const struct GNUNET_HashCode * key,
6583 const struct GNUNET_PeerIdentity *get_path,
6584 unsigned int get_path_length,
6585 const struct GNUNET_PeerIdentity *put_path,
6586 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6587 size_t size, const void *data)
6589 struct MeshPathInfo *path_info = cls;
6590 struct MeshPeerPath *p;
6591 struct GNUNET_PeerIdentity pi;
6594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
6595 GNUNET_PEER_resolve (path_info->peer->id, &pi);
6596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
6598 p = path_build_from_dht (get_path, get_path_length, put_path,
6600 path_add_to_peers (p, GNUNET_NO);
6602 for (i = 0; i < path_info->peer->ntunnels; i++)
6604 tunnel_add_peer (path_info->peer->tunnels[i], path_info->peer);
6605 peer_info_connect (path_info->peer, path_info->t);
6613 * Function to process paths received for a new peer addition. The recorded
6614 * paths form the initial tunnel, which can be optimized later.
6615 * Called on each result obtained for the DHT search.
6617 * @param cls closure
6618 * @param exp when will this value expire
6619 * @param key key of the result
6620 * @param get_path path of the get request
6621 * @param get_path_length lenght of get_path
6622 * @param put_path path of the put request
6623 * @param put_path_length length of the put_path
6624 * @param type type of the result
6625 * @param size number of bytes in data
6626 * @param data pointer to the result data
6629 dht_get_type_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6630 const struct GNUNET_HashCode * key,
6631 const struct GNUNET_PeerIdentity *get_path,
6632 unsigned int get_path_length,
6633 const struct GNUNET_PeerIdentity *put_path,
6634 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6635 size_t size, const void *data)
6637 const struct PBlock *pb = data;
6638 const struct GNUNET_PeerIdentity *pi = &pb->id;
6639 struct MeshTunnel *t = cls;
6640 struct MeshPeerInfo *peer_info;
6641 struct MeshPeerPath *p;
6643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got type DHT result!\n");
6644 if (size != sizeof (struct PBlock))
6646 GNUNET_break_op (0);
6649 if (ntohl(pb->type) != t->type)
6651 GNUNET_break_op (0);
6654 GNUNET_assert (NULL != t->owner);
6655 peer_info = peer_info_get (pi);
6656 (void) GNUNET_CONTAINER_multihashmap_put (t->peers, &pi->hashPubKey,
6658 GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
6660 p = path_build_from_dht (get_path, get_path_length, put_path,
6662 path_add_to_peers (p, GNUNET_NO);
6664 tunnel_add_peer (t, peer_info);
6665 peer_info_connect (peer_info, t);
6670 * Function to process DHT string to regex matching.
6671 * Called on each result obtained for the DHT search.
6673 * @param cls closure (search context)
6674 * @param exp when will this value expire
6675 * @param key key of the result
6676 * @param get_path path of the get request (not used)
6677 * @param get_path_length lenght of get_path (not used)
6678 * @param put_path path of the put request (not used)
6679 * @param put_path_length length of the put_path (not used)
6680 * @param type type of the result
6681 * @param size number of bytes in data
6682 * @param data pointer to the result data
6685 dht_get_string_accept_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6686 const struct GNUNET_HashCode * key,
6687 const struct GNUNET_PeerIdentity *get_path,
6688 unsigned int get_path_length,
6689 const struct GNUNET_PeerIdentity *put_path,
6690 unsigned int put_path_length,
6691 enum GNUNET_BLOCK_Type type,
6692 size_t size, const void *data)
6694 const struct MeshRegexAccept *block = data;
6695 struct MeshRegexSearchContext *ctx = cls;
6696 struct MeshRegexSearchInfo *info = ctx->info;
6697 // struct MeshPeerPath *p;
6698 struct MeshPeerInfo *peer_info;
6700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got regex results from DHT!\n");
6701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", info->description);
6702 GNUNET_STATISTICS_update (stats, "# regex accepting blocks found",
6704 GNUNET_STATISTICS_update (stats, "# regex accepting block bytes found",
6707 peer_info = peer_info_get(&block->id);
6708 // p = path_build_from_dht (get_path, get_path_length, put_path,
6709 // put_path_length);
6710 // path_add_to_peers (p, GNUNET_NO);
6713 tunnel_add_peer (info->t, peer_info);
6714 peer_info_connect (peer_info, info->t);
6715 if (0 == info->peer)
6717 info->peer = peer_info->id;
6721 GNUNET_array_append (info->peers, info->n_peers, peer_info->id);
6724 if (GNUNET_SCHEDULER_NO_TASK != info->timeout)
6727 info->timeout = GNUNET_SCHEDULER_add_delayed (connect_timeout,
6728 ®ex_connect_timeout,
6736 * Function to process DHT string to regex matching.
6737 * Called on each result obtained for the DHT search.
6739 * @param cls closure (search context)
6740 * @param exp when will this value expire
6741 * @param key key of the result
6742 * @param get_path path of the get request (not used)
6743 * @param get_path_length lenght of get_path (not used)
6744 * @param put_path path of the put request (not used)
6745 * @param put_path_length length of the put_path (not used)
6746 * @param type type of the result
6747 * @param size number of bytes in data
6748 * @param data pointer to the result data
6750 * TODO: re-issue the request after certain time? cancel after X results?
6753 dht_get_string_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6754 const struct GNUNET_HashCode * key,
6755 const struct GNUNET_PeerIdentity *get_path,
6756 unsigned int get_path_length,
6757 const struct GNUNET_PeerIdentity *put_path,
6758 unsigned int put_path_length,
6759 enum GNUNET_BLOCK_Type type,
6760 size_t size, const void *data)
6762 const struct MeshRegexBlock *block = data;
6763 struct MeshRegexSearchContext *ctx = cls;
6764 struct MeshRegexSearchInfo *info = ctx->info;
6768 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6769 "DHT GET STRING RETURNED RESULTS\n");
6770 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6771 " key: %s\n", GNUNET_h2s (key));
6773 GNUNET_STATISTICS_update (stats, "# regex blocks found",
6775 GNUNET_STATISTICS_update (stats, "# regex block bytes found",
6778 copy = GNUNET_malloc (size);
6779 memcpy (copy, data, size);
6780 GNUNET_break (GNUNET_OK ==
6781 GNUNET_CONTAINER_multihashmap_put(info->dht_get_results, key, copy,
6782 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
6783 len = ntohl (block->n_proof);
6785 char proof[len + 1];
6787 memcpy (proof, &block[1], len);
6789 if (GNUNET_OK != GNUNET_REGEX_check_proof (proof, key))
6791 GNUNET_break_op (0);
6795 len = strlen (info->description);
6796 if (len == ctx->position) // String processed
6798 if (GNUNET_YES == ntohl (block->accepting))
6800 regex_find_path(key, ctx);
6804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " block not accepting!\n");
6805 // FIXME REGEX this block not successful, wait for more? start timeout?
6810 regex_next_edge (block, size, ctx);
6815 /******************************************************************************/
6816 /********************* MESH LOCAL HANDLES **************************/
6817 /******************************************************************************/
6821 * Handler for client disconnection
6823 * @param cls closure
6824 * @param client identification of the client; NULL
6825 * for the last call when the server is destroyed
6828 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
6830 struct MeshClient *c;
6831 struct MeshClient *next;
6834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
6837 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
6844 if (c->handle != client)
6846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
6850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
6852 GNUNET_SERVER_client_drop (c->handle);
6853 c->shutting_down = GNUNET_YES;
6854 GNUNET_assert (NULL != c->own_tunnels);
6855 GNUNET_assert (NULL != c->incoming_tunnels);
6856 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
6857 &tunnel_destroy_iterator, c);
6858 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
6859 &tunnel_destroy_iterator, c);
6860 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
6861 &tunnel_destroy_iterator, c);
6862 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
6863 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
6864 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
6866 /* deregister clients applications */
6867 if (NULL != c->apps)
6869 GNUNET_CONTAINER_multihashmap_iterate (c->apps, &deregister_app, c->apps);
6870 GNUNET_CONTAINER_multihashmap_destroy (c->apps);
6872 if (0 == GNUNET_CONTAINER_multihashmap_size (applications) &&
6873 GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
6875 GNUNET_SCHEDULER_cancel (announce_applications_task);
6876 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
6878 if (NULL != c->types)
6879 GNUNET_CONTAINER_multihashmap_destroy (c->types);
6880 for (i = 0; i < c->n_regex; i++)
6882 GNUNET_free (c->regexes[i].regex);
6883 if (NULL != c->regexes[i].dfa)
6884 GNUNET_REGEX_automaton_destroy (c->regexes[i].dfa);
6886 GNUNET_free_non_null (c->regexes);
6887 if (GNUNET_SCHEDULER_NO_TASK != c->regex_announce_task)
6888 GNUNET_SCHEDULER_cancel (c->regex_announce_task);
6890 GNUNET_CONTAINER_DLL_remove (clients, clients_tail, c);
6891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
6893 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
6896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " done!\n");
6902 * Handler for new clients
6904 * @param cls closure
6905 * @param client identification of the client
6906 * @param message the actual message, which includes messages the client wants
6909 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
6910 const struct GNUNET_MessageHeader *message)
6912 struct GNUNET_MESH_ClientConnect *cc_msg;
6913 struct MeshClient *c;
6914 GNUNET_MESH_ApplicationType *a;
6921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
6922 /* Check data sanity */
6923 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
6924 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
6925 ntypes = ntohs (cc_msg->types);
6926 napps = ntohs (cc_msg->applications);
6928 ntypes * sizeof (uint16_t) + napps * sizeof (GNUNET_MESH_ApplicationType))
6931 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6935 /* Create new client structure */
6936 c = GNUNET_malloc (sizeof (struct MeshClient));
6937 c->id = next_client_id++;
6938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
6940 GNUNET_SERVER_client_keep (client);
6941 a = (GNUNET_MESH_ApplicationType *) &cc_msg[1];
6944 GNUNET_MESH_ApplicationType at;
6945 struct GNUNET_HashCode hc;
6947 c->apps = GNUNET_CONTAINER_multihashmap_create (napps, GNUNET_NO);
6948 for (i = 0; i < napps; i++)
6951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " app type: %u\n", at);
6952 GNUNET_CRYPTO_hash (&at, sizeof (at), &hc);
6953 /* store in clients hashmap */
6954 GNUNET_CONTAINER_multihashmap_put (c->apps, &hc, (void *) (long) at,
6955 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6956 /* store in global hashmap, for announcements */
6957 GNUNET_CONTAINER_multihashmap_put (applications, &hc, c,
6958 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6960 if (GNUNET_SCHEDULER_NO_TASK == announce_applications_task)
6961 announce_applications_task =
6962 GNUNET_SCHEDULER_add_now (&announce_applications, NULL);
6968 struct GNUNET_HashCode hc;
6970 t = (uint16_t *) & a[napps];
6971 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes, GNUNET_NO);
6972 for (i = 0; i < ntypes; i++)
6975 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
6976 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc);
6978 /* store in clients hashmap */
6979 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
6980 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6981 /* store in global hashmap */
6982 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
6983 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6986 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6987 " client has %u+%u subscriptions\n", napps, ntypes);
6989 GNUNET_CONTAINER_DLL_insert (clients, clients_tail, c);
6990 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6991 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6992 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
6993 GNUNET_SERVER_notification_context_add (nc, client);
6994 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
6996 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
7002 * Handler for clients announcing available services by a regular expression.
7004 * @param cls closure
7005 * @param client identification of the client
7006 * @param message the actual message, which includes messages the client wants
7009 handle_local_announce_regex (void *cls, struct GNUNET_SERVER_Client *client,
7010 const struct GNUNET_MessageHeader *message)
7012 const struct GNUNET_MESH_RegexAnnounce *msg;
7013 struct MeshRegexDescriptor rd;
7014 struct MeshClient *c;
7019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex started\n");
7021 /* Sanity check for client registration */
7022 if (NULL == (c = client_get (client)))
7025 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7028 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7030 msg = (const struct GNUNET_MESH_RegexAnnounce *) message;
7032 len = ntohs (message->size) - sizeof(struct GNUNET_MESH_RegexAnnounce);
7033 if (NULL != c->partial_regex)
7035 regex = c->partial_regex;
7036 offset = strlen (c->partial_regex);
7037 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7038 " continuation, already have %u bytes\n",
7047 regex = GNUNET_realloc (regex, offset + len + 1);
7048 memcpy (®ex[offset], &msg[1], len);
7049 regex[offset + len] = '\0';
7050 if (0 == ntohs (msg->last))
7052 c->partial_regex = regex;
7053 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7054 " not ended, stored %u bytes for later\n",
7056 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7060 rd.compression = ntohs (msg->compression_characters);
7062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " length %u\n", len);
7063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regex %s\n", regex);
7064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " cm %u\n", ntohs(rd.compression));
7065 GNUNET_array_append (c->regexes, c->n_regex, rd);
7066 c->partial_regex = NULL;
7067 if (GNUNET_SCHEDULER_NO_TASK == c->regex_announce_task)
7069 c->regex_announce_task = GNUNET_SCHEDULER_add_now(&announce_regex, c);
7075 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "announce regex processed\n");
7081 * Handler for requests of new tunnels
7083 * @param cls closure
7084 * @param client identification of the client
7085 * @param message the actual message
7088 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
7089 const struct GNUNET_MessageHeader *message)
7091 struct GNUNET_MESH_TunnelMessage *t_msg;
7092 struct MeshTunnel *t;
7093 struct MeshClient *c;
7094 MESH_TunnelNumber tid;
7096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
7098 /* Sanity check for client registration */
7099 if (NULL == (c = client_get (client)))
7102 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7107 /* Message sanity check */
7108 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
7111 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7115 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
7116 /* Sanity check for tunnel numbering */
7117 tid = ntohl (t_msg->tunnel_id);
7118 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
7121 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7124 /* Sanity check for duplicate tunnel IDs */
7125 if (NULL != tunnel_get_by_local_id (c, tid))
7128 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7132 while (NULL != tunnel_get_by_pi (myid, next_tid))
7133 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
7134 t = tunnel_new (myid, next_tid++, c, tid);
7137 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Tunnel creation failed.\n");
7139 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7142 next_tid = next_tid & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
7143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
7144 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
7145 t->peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
7147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel created\n");
7148 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7154 * Handler for requests of deleting tunnels
7156 * @param cls closure
7157 * @param client identification of the client
7158 * @param message the actual message
7161 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
7162 const struct GNUNET_MessageHeader *message)
7164 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
7165 struct MeshClient *c;
7166 struct MeshTunnel *t;
7167 MESH_TunnelNumber tid;
7169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7170 "Got a DESTROY TUNNEL from client!\n");
7172 /* Sanity check for client registration */
7173 if (NULL == (c = client_get (client)))
7176 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7181 /* Message sanity check */
7182 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
7185 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7189 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
7191 /* Retrieve tunnel */
7192 tid = ntohl (tunnel_msg->tunnel_id);
7193 t = tunnel_get_by_local_id(c, tid);
7196 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
7198 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7201 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
7203 client_ignore_tunnel (c, t);
7204 tunnel_destroy_empty (t);
7205 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7208 send_client_tunnel_disconnect(t, c);
7209 client_delete_tunnel(c, t);
7211 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
7213 tunnel_send_destroy (t, GNUNET_YES);
7214 t->destroy = GNUNET_YES;
7215 // The tunnel will be destroyed when the last message is transmitted.
7216 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7222 * Handler for requests of seeting tunnel's speed.
7224 * @param cls Closure (unused).
7225 * @param client Identification of the client.
7226 * @param message The actual message.
7229 handle_local_tunnel_speed (void *cls, struct GNUNET_SERVER_Client *client,
7230 const struct GNUNET_MessageHeader *message)
7232 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
7233 struct MeshClient *c;
7234 struct MeshTunnel *t;
7235 MESH_TunnelNumber tid;
7237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7238 "Got a SPEED request from client!\n");
7240 /* Sanity check for client registration */
7241 if (NULL == (c = client_get (client)))
7244 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7250 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
7252 /* Retrieve tunnel */
7253 tid = ntohl (tunnel_msg->tunnel_id);
7254 t = tunnel_get_by_local_id(c, tid);
7257 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " tunnel %X not found\n", tid);
7259 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7263 switch (ntohs(message->type))
7265 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN:
7266 t->speed_min = GNUNET_YES;
7268 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX:
7269 t->speed_min = GNUNET_NO;
7274 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7279 * Handler for requests of seeting tunnel's buffering policy.
7281 * @param cls Closure (unused).
7282 * @param client Identification of the client.
7283 * @param message The actual message.
7286 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
7287 const struct GNUNET_MessageHeader *message)
7289 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
7290 struct MeshClient *c;
7291 struct MeshTunnel *t;
7292 MESH_TunnelNumber tid;
7294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7295 "Got a BUFFER request from client!\n");
7297 /* Sanity check for client registration */
7298 if (NULL == (c = client_get (client)))
7301 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7304 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7306 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
7308 /* Retrieve tunnel */
7309 tid = ntohl (tunnel_msg->tunnel_id);
7310 t = tunnel_get_by_local_id(c, tid);
7313 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
7315 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7319 switch (ntohs(message->type))
7321 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
7322 t->nobuffer = GNUNET_NO;
7324 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
7325 t->nobuffer = GNUNET_YES;
7331 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7336 * Handler for connection requests to new peers
7338 * @param cls closure
7339 * @param client identification of the client
7340 * @param message the actual message (PeerControl)
7343 handle_local_connect_add (void *cls, struct GNUNET_SERVER_Client *client,
7344 const struct GNUNET_MessageHeader *message)
7346 struct GNUNET_MESH_PeerControl *peer_msg;
7347 struct MeshPeerInfo *peer_info;
7348 struct MeshClient *c;
7349 struct MeshTunnel *t;
7350 MESH_TunnelNumber tid;
7352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got connection request\n");
7353 /* Sanity check for client registration */
7354 if (NULL == (c = client_get (client)))
7357 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7362 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7364 /* Sanity check for message size */
7365 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7368 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7372 /* Tunnel exists? */
7373 tid = ntohl (peer_msg->tunnel_id);
7374 t = tunnel_get_by_local_id (c, tid);
7378 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7382 /* Does client own tunnel? */
7383 if (t->owner->handle != client)
7386 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n",
7390 GNUNET_i2s (&peer_msg->peer));
7391 peer_info = peer_info_get (&peer_msg->peer);
7393 tunnel_add_peer (t, peer_info);
7394 peer_info_connect (peer_info, t);
7396 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7402 * Handler for disconnection requests of peers in a tunnel
7404 * @param cls closure
7405 * @param client identification of the client
7406 * @param message the actual message (PeerControl)
7409 handle_local_connect_del (void *cls, struct GNUNET_SERVER_Client *client,
7410 const struct GNUNET_MessageHeader *message)
7412 struct GNUNET_MESH_PeerControl *peer_msg;
7413 struct MeshPeerInfo *peer_info;
7414 struct MeshClient *c;
7415 struct MeshTunnel *t;
7416 MESH_TunnelNumber tid;
7418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER DEL request\n");
7419 /* Sanity check for client registration */
7420 if (NULL == (c = client_get (client)))
7423 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7428 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7430 /* Sanity check for message size */
7431 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7434 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7438 /* Tunnel exists? */
7439 tid = ntohl (peer_msg->tunnel_id);
7440 t = tunnel_get_by_local_id (c, tid);
7444 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7449 /* Does client own tunnel? */
7450 if (t->owner->handle != client)
7453 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for peer %s\n",
7458 GNUNET_i2s (&peer_msg->peer));
7459 /* Is the peer in the tunnel? */
7461 GNUNET_CONTAINER_multihashmap_get (t->peers, &peer_msg->peer.hashPubKey);
7462 if (NULL == peer_info)
7465 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7469 /* Ok, delete peer from tunnel */
7470 GNUNET_CONTAINER_multihashmap_remove_all (t->peers,
7471 &peer_msg->peer.hashPubKey);
7473 send_destroy_path (t, peer_info->id);
7474 tunnel_delete_peer (t, peer_info->id);
7475 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7480 * Handler for blacklist requests of peers in a tunnel
7482 * @param cls closure
7483 * @param client identification of the client
7484 * @param message the actual message (PeerControl)
7486 * FIXME implement DHT block bloomfilter
7489 handle_local_blacklist (void *cls, struct GNUNET_SERVER_Client *client,
7490 const struct GNUNET_MessageHeader *message)
7492 struct GNUNET_MESH_PeerControl *peer_msg;
7493 struct MeshClient *c;
7494 struct MeshTunnel *t;
7495 MESH_TunnelNumber tid;
7497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER BLACKLIST request\n");
7498 /* Sanity check for client registration */
7499 if (NULL == (c = client_get (client)))
7502 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7507 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7509 /* Sanity check for message size */
7510 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7513 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7517 /* Tunnel exists? */
7518 tid = ntohl (peer_msg->tunnel_id);
7519 t = tunnel_get_by_local_id (c, tid);
7523 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7528 GNUNET_array_append(t->blacklisted, t->nblacklisted,
7529 GNUNET_PEER_intern(&peer_msg->peer));
7534 * Handler for unblacklist requests of peers in a tunnel
7536 * @param cls closure
7537 * @param client identification of the client
7538 * @param message the actual message (PeerControl)
7541 handle_local_unblacklist (void *cls, struct GNUNET_SERVER_Client *client,
7542 const struct GNUNET_MessageHeader *message)
7544 struct GNUNET_MESH_PeerControl *peer_msg;
7545 struct MeshClient *c;
7546 struct MeshTunnel *t;
7547 MESH_TunnelNumber tid;
7551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a PEER UNBLACKLIST request\n");
7552 /* Sanity check for client registration */
7553 if (NULL == (c = client_get (client)))
7556 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7561 peer_msg = (struct GNUNET_MESH_PeerControl *) message;
7563 /* Sanity check for message size */
7564 if (sizeof (struct GNUNET_MESH_PeerControl) != ntohs (peer_msg->header.size))
7567 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7571 /* Tunnel exists? */
7572 tid = ntohl (peer_msg->tunnel_id);
7573 t = tunnel_get_by_local_id (c, tid);
7577 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", t->id.tid);
7582 /* if peer is not known, complain */
7583 pid = GNUNET_PEER_search (&peer_msg->peer);
7590 /* search and remove from list */
7591 for (i = 0; i < t->nblacklisted; i++)
7593 if (t->blacklisted[i] == pid)
7595 t->blacklisted[i] = t->blacklisted[t->nblacklisted - 1];
7596 GNUNET_array_grow (t->blacklisted, t->nblacklisted, t->nblacklisted - 1);
7601 /* if peer hasn't been blacklisted, complain */
7607 * Handler for connection requests to new peers by type
7609 * @param cls closure
7610 * @param client identification of the client
7611 * @param message the actual message (ConnectPeerByType)
7614 handle_local_connect_by_type (void *cls, struct GNUNET_SERVER_Client *client,
7615 const struct GNUNET_MessageHeader *message)
7617 struct GNUNET_MESH_ConnectPeerByType *connect_msg;
7618 struct MeshClient *c;
7619 struct MeshTunnel *t;
7620 struct GNUNET_HashCode hash;
7621 MESH_TunnelNumber tid;
7623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got connect by type request\n");
7624 /* Sanity check for client registration */
7625 if (NULL == (c = client_get (client)))
7628 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7633 connect_msg = (struct GNUNET_MESH_ConnectPeerByType *) message;
7635 /* Sanity check for message size */
7636 if (sizeof (struct GNUNET_MESH_ConnectPeerByType) !=
7637 ntohs (connect_msg->header.size))
7640 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7644 /* Tunnel exists? */
7645 tid = ntohl (connect_msg->tunnel_id);
7646 t = tunnel_get_by_local_id (c, tid);
7650 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7654 /* Does client own tunnel? */
7655 if (t->owner->handle != client)
7658 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7662 /* Do WE have the service? */
7663 t->type = ntohl (connect_msg->type);
7664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type requested: %u\n", t->type);
7665 GNUNET_CRYPTO_hash (&t->type, sizeof (GNUNET_MESH_ApplicationType), &hash);
7666 if (GNUNET_CONTAINER_multihashmap_contains (applications, &hash) ==
7669 /* Yes! Fast forward, add ourselves to the tunnel and send the
7670 * good news to the client, and alert the destination client of
7671 * an incoming tunnel.
7673 * FIXME send a path create to self, avoid code duplication
7675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " available locally\n");
7676 GNUNET_CONTAINER_multihashmap_put (t->peers, &my_full_id.hashPubKey,
7677 peer_info_get (&my_full_id),
7678 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " notifying client\n");
7681 send_client_peer_connected (t, myid);
7682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Done\n");
7683 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7685 t->local_tid_dest = next_local_tid++;
7686 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
7687 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
7688 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
7692 /* Ok, lets find a peer offering the service */
7693 if (NULL != t->dht_get_type)
7695 GNUNET_DHT_get_stop (t->dht_get_type);
7697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " looking in DHT for %s\n",
7698 GNUNET_h2s (&hash));
7700 GNUNET_DHT_get_start (dht_handle,
7701 GNUNET_BLOCK_TYPE_MESH_PEER_BY_TYPE,
7703 dht_replication_level,
7704 GNUNET_DHT_RO_RECORD_ROUTE |
7705 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7707 &dht_get_type_handler, t);
7709 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7715 * Handler for connection requests to new peers by a string service description.
7717 * @param cls closure
7718 * @param client identification of the client
7719 * @param message the actual message, which includes messages the client wants
7722 handle_local_connect_by_string (void *cls, struct GNUNET_SERVER_Client *client,
7723 const struct GNUNET_MessageHeader *message)
7725 struct GNUNET_MESH_ConnectPeerByString *msg;
7726 struct MeshRegexSearchContext *ctx;
7727 struct MeshRegexSearchInfo *info;
7728 struct GNUNET_DHT_GetHandle *get_h;
7729 struct GNUNET_HashCode key;
7730 struct MeshTunnel *t;
7731 struct MeshClient *c;
7732 MESH_TunnelNumber tid;
7737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7738 "Connect by string started\n");
7739 msg = (struct GNUNET_MESH_ConnectPeerByString *) message;
7740 size = htons (message->size);
7742 /* Sanity check for client registration */
7743 if (NULL == (c = client_get (client)))
7746 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7749 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7751 /* Message size sanity check */
7752 if (sizeof(struct GNUNET_MESH_ConnectPeerByString) >= size)
7755 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7759 /* Tunnel exists? */
7760 tid = ntohl (msg->tunnel_id);
7761 t = tunnel_get_by_local_id (c, tid);
7765 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7769 /* Does client own tunnel? */
7770 if (t->owner->handle != client)
7773 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7778 " on tunnel %s [%u]\n",
7779 GNUNET_i2s(&my_full_id),
7782 /* Only one connect_by_string allowed at the same time! */
7783 /* FIXME: allow more, return handle at api level to cancel, document */
7784 if (NULL != t->regex_ctx)
7787 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7791 /* Find string itself */
7792 len = size - sizeof(struct GNUNET_MESH_ConnectPeerByString);
7793 string = (const char *) &msg[1];
7795 /* Initialize context */
7796 size = GNUNET_REGEX_get_first_key (string, len, &key);
7797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7798 " consumed %u bits out of %u\n", size, len);
7799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7800 " looking for %s\n", GNUNET_h2s (&key));
7802 info = GNUNET_malloc (sizeof (struct MeshRegexSearchInfo));
7804 info->description = GNUNET_strndup (string, len);
7805 info->dht_get_handles = GNUNET_CONTAINER_multihashmap_create(32, GNUNET_NO);
7806 info->dht_get_results = GNUNET_CONTAINER_multihashmap_create(32, GNUNET_NO);
7807 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " string: %s\n", info->description);
7809 ctx = GNUNET_malloc (sizeof (struct MeshRegexSearchContext));
7810 ctx->position = size;
7814 GNUNET_array_append (info->contexts, info->n_contexts, ctx);
7816 /* Start search in DHT */
7817 get_h = GNUNET_DHT_get_start (dht_handle, /* handle */
7818 GNUNET_BLOCK_TYPE_MESH_REGEX, /* type */
7819 &key, /* key to search */
7820 dht_replication_level, /* replication level */
7821 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
7822 &info->description[size], /* xquery */
7823 // FIXME add BLOOMFILTER to exclude filtered peers
7824 len + 1 - size, /* xquery bits */
7825 // FIXME add BLOOMFILTER SIZE
7826 &dht_get_string_handler, ctx);
7828 GNUNET_break (GNUNET_OK ==
7829 GNUNET_CONTAINER_multihashmap_put(info->dht_get_handles,
7832 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
7834 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "connect by string processed\n");
7840 * Handler for client traffic directed to one peer
7842 * @param cls closure
7843 * @param client identification of the client
7844 * @param message the actual message
7847 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
7848 const struct GNUNET_MessageHeader *message)
7850 struct MeshClient *c;
7851 struct MeshTunnel *t;
7852 struct MeshPeerInfo *pi;
7853 struct GNUNET_MESH_Unicast *data_msg;
7854 MESH_TunnelNumber tid;
7857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7858 "Got a unicast request from a client!\n");
7860 /* Sanity check for client registration */
7861 if (NULL == (c = client_get (client)))
7864 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7867 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7869 data_msg = (struct GNUNET_MESH_Unicast *) message;
7871 /* Sanity check for message size */
7872 size = ntohs (message->size);
7873 if (sizeof (struct GNUNET_MESH_Unicast) +
7874 sizeof (struct GNUNET_MessageHeader) > size)
7877 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7881 /* Tunnel exists? */
7882 tid = ntohl (data_msg->tid);
7883 t = tunnel_get_by_local_id (c, tid);
7887 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7891 /* Is it a local tunnel? Then, does client own the tunnel? */
7892 if (t->owner->handle != client)
7895 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7899 pi = GNUNET_CONTAINER_multihashmap_get (t->peers,
7900 &data_msg->destination.hashPubKey);
7901 /* Is the selected peer in the tunnel? */
7905 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7909 /* PID should be as expected */
7910 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
7913 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7914 "Unicast PID, expected %u, got %u\n",
7915 t->fwd_pid + 1, ntohl (data_msg->pid));
7916 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7920 /* Ok, everything is correct, send the message
7921 * (pretend we got it from a mesh peer)
7924 /* Work around const limitation */
7925 char buf[ntohs (message->size)] GNUNET_ALIGN;
7926 struct GNUNET_MESH_Unicast *copy;
7928 copy = (struct GNUNET_MESH_Unicast *) buf;
7929 memcpy (buf, data_msg, size);
7930 copy->oid = my_full_id;
7931 copy->tid = htonl (t->id.tid);
7932 copy->ttl = htonl (default_ttl);
7933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7934 " calling generic handler...\n");
7935 handle_mesh_data_unicast (NULL, &my_full_id, ©->header, NULL, 0);
7937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
7938 GNUNET_SERVER_receive_done (client, GNUNET_OK);
7945 * Handler for client traffic directed to the origin
7947 * @param cls closure
7948 * @param client identification of the client
7949 * @param message the actual message
7952 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
7953 const struct GNUNET_MessageHeader *message)
7955 struct GNUNET_MESH_ToOrigin *data_msg;
7956 struct MeshTunnelClientInfo *clinfo;
7957 struct MeshClient *c;
7958 struct MeshTunnel *t;
7959 MESH_TunnelNumber tid;
7962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
7963 "Got a ToOrigin request from a client!\n");
7964 /* Sanity check for client registration */
7965 if (NULL == (c = client_get (client)))
7968 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
7973 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
7975 /* Sanity check for message size */
7976 size = ntohs (message->size);
7977 if (sizeof (struct GNUNET_MESH_ToOrigin) +
7978 sizeof (struct GNUNET_MessageHeader) > size)
7981 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7985 /* Tunnel exists? */
7986 tid = ntohl (data_msg->tid);
7987 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
7988 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
7991 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
7994 t = tunnel_get_by_local_id (c, tid);
7997 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
7998 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
8000 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8004 /* It should be sent by someone who has this as incoming tunnel. */
8005 if (GNUNET_NO == client_knows_tunnel (c, t))
8008 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8012 /* PID should be as expected */
8013 clinfo = tunnel_get_client_fc (t, c);
8014 if (ntohl (data_msg->pid) != clinfo->bck_pid + 1)
8017 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8018 "To Origin PID, expected %u, got %u\n",
8019 clinfo->bck_pid + 1,
8020 ntohl (data_msg->pid));
8021 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8026 /* Ok, everything is correct, send the message
8027 * (pretend we got it from a mesh peer)
8030 char buf[ntohs (message->size)] GNUNET_ALIGN;
8031 struct GNUNET_MESH_ToOrigin *copy;
8033 /* Work around const limitation */
8034 copy = (struct GNUNET_MESH_ToOrigin *) buf;
8035 memcpy (buf, data_msg, size);
8036 GNUNET_PEER_resolve (t->id.oid, ©->oid);
8037 copy->tid = htonl (t->id.tid);
8038 copy->ttl = htonl (default_ttl);
8039 copy->pid = htonl (t->bck_pid + 1);
8041 copy->sender = my_full_id;
8042 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
8043 " calling generic handler...\n");
8044 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header, NULL, 0);
8046 GNUNET_SERVER_receive_done (client, GNUNET_OK);
8053 * Handler for client traffic directed to all peers in a tunnel
8055 * @param cls closure
8056 * @param client identification of the client
8057 * @param message the actual message
8060 handle_local_multicast (void *cls, struct GNUNET_SERVER_Client *client,
8061 const struct GNUNET_MessageHeader *message)
8063 struct MeshClient *c;
8064 struct MeshTunnel *t;
8065 struct GNUNET_MESH_Multicast *data_msg;
8066 MESH_TunnelNumber tid;
8068 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
8069 "Got a multicast request from a client!\n");
8071 /* Sanity check for client registration */
8072 if (NULL == (c = client_get (client)))
8075 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8078 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
8080 data_msg = (struct GNUNET_MESH_Multicast *) message;
8082 /* Sanity check for message size */
8083 if (sizeof (struct GNUNET_MESH_Multicast) +
8084 sizeof (struct GNUNET_MessageHeader) > ntohs (data_msg->header.size))
8087 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8091 /* Tunnel exists? */
8092 tid = ntohl (data_msg->tid);
8093 t = tunnel_get_by_local_id (c, tid);
8097 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
8098 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
8100 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8104 /* Does client own tunnel? */
8105 if (t->owner->handle != client)
8108 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8112 /* PID should be as expected */
8113 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
8116 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8117 "Multicast PID, expected %u, got %u\n",
8118 t->fwd_pid + 1, ntohl (data_msg->pid));
8119 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8124 char buf[ntohs (message->size)] GNUNET_ALIGN;
8125 struct GNUNET_MESH_Multicast *copy;
8127 copy = (struct GNUNET_MESH_Multicast *) buf;
8128 memcpy (buf, message, ntohs (message->size));
8129 copy->oid = my_full_id;
8130 copy->tid = htonl (t->id.tid);
8131 copy->ttl = htonl (default_ttl);
8132 GNUNET_assert (ntohl (copy->pid) == (t->fwd_pid + 1));
8133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
8134 " calling generic handler...\n");
8135 handle_mesh_data_multicast (client, &my_full_id, ©->header, NULL, 0);
8138 GNUNET_SERVER_receive_done (t->owner->handle, GNUNET_OK);
8144 * Handler for client's ACKs for payload traffic.
8146 * @param cls Closure (unused).
8147 * @param client Identification of the client.
8148 * @param message The actual message.
8151 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
8152 const struct GNUNET_MessageHeader *message)
8154 struct GNUNET_MESH_LocalAck *msg;
8155 struct MeshTunnel *t;
8156 struct MeshClient *c;
8157 MESH_TunnelNumber tid;
8160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
8161 /* Sanity check for client registration */
8162 if (NULL == (c = client_get (client)))
8165 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
8170 msg = (struct GNUNET_MESH_LocalAck *) message;
8172 /* Tunnel exists? */
8173 tid = ntohl (msg->tunnel_id);
8174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
8175 t = tunnel_get_by_local_id (c, tid);
8179 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
8180 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
8181 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8185 ack = ntohl (msg->max_pid);
8186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
8188 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
8189 if (NULL != t->owner && t->owner->handle == client)
8191 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
8193 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
8197 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
8198 tunnel_set_client_fwd_ack (t, c, ack);
8199 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
8202 GNUNET_SERVER_receive_done (client, GNUNET_OK);
8209 * Iterator over all peers to send a monitoring client info about a tunnel.
8211 * @param cls Closure (message being built).
8212 * @param key Key (hashed tunnel ID, unused).
8213 * @param value Peer info.
8215 * @return GNUNET_YES, to keep iterating.
8218 monitor_peers_iterator (void *cls,
8219 const struct GNUNET_HashCode * key,
8222 struct GNUNET_MESH_LocalMonitor *msg = cls;
8223 struct GNUNET_PeerIdentity *id;
8224 struct MeshPeerInfo *info = value;
8226 id = (struct GNUNET_PeerIdentity *) &msg[1];
8227 GNUNET_PEER_resolve (info->id, &id[msg->npeers]);
8230 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8231 "* sending info about peer %s [%u]\n",
8232 GNUNET_i2s (&id[msg->npeers - 1]), msg->npeers);
8240 * Iterator over all tunnels to send a monitoring client info about each tunnel.
8242 * @param cls Closure (client handle).
8243 * @param key Key (hashed tunnel ID, unused).
8244 * @param value Tunnel info.
8246 * @return GNUNET_YES, to keep iterating.
8249 monitor_all_tunnels_iterator (void *cls,
8250 const struct GNUNET_HashCode * key,
8253 struct GNUNET_SERVER_Client *client = cls;
8254 struct MeshTunnel *t = value;
8255 struct GNUNET_MESH_LocalMonitor *msg;
8258 npeers = GNUNET_CONTAINER_multihashmap_size (t->peers);
8259 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor) +
8260 npeers * sizeof (struct GNUNET_PeerIdentity));
8261 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
8262 msg->tunnel_id = htonl (t->id.tid);
8263 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor) +
8264 npeers * sizeof (struct GNUNET_PeerIdentity));
8265 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
8267 (void) GNUNET_CONTAINER_multihashmap_iterate (t->peers,
8268 monitor_peers_iterator,
8271 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8272 "* sending info about tunnel %s [%u] (%u peers)\n",
8273 GNUNET_i2s (&msg->owner), t->id.tid, npeers);
8275 if (msg->npeers != npeers)
8278 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8279 "Get tunnels fail: size %u - iter %u\n",
8280 npeers, msg->npeers);
8283 msg->npeers = htonl (npeers);
8284 GNUNET_SERVER_notification_context_unicast (nc, client,
8285 &msg->header, GNUNET_NO);
8291 * Handler for client's MONITOR request.
8293 * @param cls Closure (unused).
8294 * @param client Identification of the client.
8295 * @param message The actual message.
8298 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
8299 const struct GNUNET_MessageHeader *message)
8301 struct MeshClient *c;
8303 /* Sanity check for client registration */
8304 if (NULL == (c = client_get (client)))
8307 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8311 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8312 "Received get tunnels request from client %u\n",
8314 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
8315 monitor_all_tunnels_iterator,
8317 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8318 "Get tunnels request from client %u completed\n",
8320 GNUNET_SERVER_receive_done (client, GNUNET_OK);
8325 * Data needed to build a Monitor_Tunnel message.
8327 struct MeshMonitorTunnelContext
8330 * Partial message, including peer count.
8332 struct GNUNET_MESH_LocalMonitor *msg;
8335 * Hashmap with positions: peer->position.
8337 struct GNUNET_CONTAINER_MultiHashMap *lookup;
8340 * Index of the parent of each peer in the message, realtive to the absolute
8341 * order in the array (can be in a previous message).
8343 uint32_t parents[1024];
8346 * Peers visited so far in the tree, aka position of the current peer.
8348 unsigned int npeers;
8351 * Client requesting the info.
8353 struct MeshClient *c;
8358 * Send a client a message about the structure of a tunnel.
8360 * @param ctx Context of the tunnel iteration, with info regarding the state
8361 * of the execution and the number of peers visited for this message.
8364 send_client_tunnel_info (struct MeshMonitorTunnelContext *ctx)
8366 struct GNUNET_MESH_LocalMonitor *resp = ctx->msg;
8367 struct GNUNET_PeerIdentity *pid;
8368 unsigned int *parent;
8371 size = sizeof (struct GNUNET_MESH_LocalMonitor);
8372 size += (sizeof (struct GNUNET_PeerIdentity) + sizeof (int)) * resp->npeers;
8373 resp->header.size = htons (size);
8374 pid = (struct GNUNET_PeerIdentity *) &resp[1];
8375 parent = (unsigned int *) &pid[resp->npeers];
8376 memcpy (parent, ctx->parents, sizeof(uint32_t) * resp->npeers);
8377 GNUNET_SERVER_notification_context_unicast (nc, ctx->c->handle,
8378 &resp->header, GNUNET_NO);
8382 * Iterator over a tunnel tree to build a message containing all peers
8383 * the in the tunnel, including relay nodes.
8385 * @param cls Closure (pointer to pointer of message being built).
8386 * @param peer Short ID of a peer.
8387 * @param parent Short ID of the @c peer 's parent.
8390 tunnel_tree_iterator (void *cls,
8391 GNUNET_PEER_Id peer,
8392 GNUNET_PEER_Id parent)
8394 struct MeshMonitorTunnelContext *ctx = cls;
8395 struct GNUNET_MESH_LocalMonitor *msg;
8396 struct GNUNET_PeerIdentity *pid;
8397 struct GNUNET_PeerIdentity ppid;
8400 pid = (struct GNUNET_PeerIdentity *) &msg[1];
8401 GNUNET_PEER_resolve (peer, &pid[msg->npeers]);
8402 GNUNET_CONTAINER_multihashmap_put (ctx->lookup,
8403 &pid[msg->npeers].hashPubKey,
8404 (void *) (long) ctx->npeers,
8405 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
8406 GNUNET_PEER_resolve (parent, &ppid);
8407 ctx->parents[msg->npeers] =
8408 htonl ((long) GNUNET_CONTAINER_multihashmap_get (ctx->lookup,
8414 if (sizeof (struct GNUNET_MESH_LocalMonitor) +
8416 (sizeof (struct GNUNET_PeerIdentity) + sizeof (uint32_t))
8419 send_client_tunnel_info (ctx);
8426 * Handler for client's MONITOR_TUNNEL request.
8428 * @param cls Closure (unused).
8429 * @param client Identification of the client.
8430 * @param message The actual message.
8433 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
8434 const struct GNUNET_MessageHeader *message)
8436 const struct GNUNET_MESH_LocalMonitor *msg;
8437 struct GNUNET_MESH_LocalMonitor *resp;
8438 struct MeshMonitorTunnelContext ctx;
8439 struct MeshClient *c;
8440 struct MeshTunnel *t;
8442 /* Sanity check for client registration */
8443 if (NULL == (c = client_get (client)))
8446 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
8450 msg = (struct GNUNET_MESH_LocalMonitor *) message;
8451 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8452 "Received tunnel info request from client %u for tunnel %s[%X]\n",
8455 ntohl (msg->tunnel_id));
8456 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
8459 /* We don't know the tunnel */
8460 struct GNUNET_MESH_LocalMonitor warn;
8463 warn.npeers = htonl (UINT_MAX);
8464 GNUNET_SERVER_notification_context_unicast (nc, client,
8467 GNUNET_SERVER_receive_done (client, GNUNET_OK);
8471 /* Initialize context */
8472 resp = GNUNET_malloc (USHRT_MAX); /* avoid realloc'ing on each step */
8476 ctx.lookup = GNUNET_CONTAINER_multihashmap_create (4 * t->peers_total,
8480 /* Collect and send information */
8481 tree_iterate_all (t->tree, &tunnel_tree_iterator, &ctx);
8482 send_client_tunnel_info (&ctx);
8485 GNUNET_CONTAINER_multihashmap_destroy (ctx.lookup);
8488 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8489 "Monitor tunnel request from client %u completed\n",
8491 GNUNET_SERVER_receive_done (client, GNUNET_OK);
8496 * Functions to handle messages from clients
8498 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
8499 {&handle_local_new_client, NULL,
8500 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
8501 {&handle_local_announce_regex, NULL,
8502 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ANNOUNCE_REGEX, 0},
8503 {&handle_local_tunnel_create, NULL,
8504 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
8505 sizeof (struct GNUNET_MESH_TunnelMessage)},
8506 {&handle_local_tunnel_destroy, NULL,
8507 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
8508 sizeof (struct GNUNET_MESH_TunnelMessage)},
8509 {&handle_local_tunnel_speed, NULL,
8510 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MIN,
8511 sizeof (struct GNUNET_MESH_TunnelMessage)},
8512 {&handle_local_tunnel_speed, NULL,
8513 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_MAX,
8514 sizeof (struct GNUNET_MESH_TunnelMessage)},
8515 {&handle_local_tunnel_buffer, NULL,
8516 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
8517 sizeof (struct GNUNET_MESH_TunnelMessage)},
8518 {&handle_local_tunnel_buffer, NULL,
8519 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
8520 sizeof (struct GNUNET_MESH_TunnelMessage)},
8521 {&handle_local_connect_add, NULL,
8522 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD,
8523 sizeof (struct GNUNET_MESH_PeerControl)},
8524 {&handle_local_connect_del, NULL,
8525 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DEL,
8526 sizeof (struct GNUNET_MESH_PeerControl)},
8527 {&handle_local_blacklist, NULL,
8528 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_BLACKLIST,
8529 sizeof (struct GNUNET_MESH_PeerControl)},
8530 {&handle_local_unblacklist, NULL,
8531 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_UNBLACKLIST,
8532 sizeof (struct GNUNET_MESH_PeerControl)},
8533 {&handle_local_connect_by_type, NULL,
8534 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_TYPE,
8535 sizeof (struct GNUNET_MESH_ConnectPeerByType)},
8536 {&handle_local_connect_by_string, NULL,
8537 GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_ADD_BY_STRING, 0},
8538 {&handle_local_unicast, NULL,
8539 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
8540 {&handle_local_to_origin, NULL,
8541 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
8542 {&handle_local_multicast, NULL,
8543 GNUNET_MESSAGE_TYPE_MESH_MULTICAST, 0},
8544 {&handle_local_ack, NULL,
8545 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
8546 sizeof (struct GNUNET_MESH_LocalAck)},
8547 {&handle_local_get_tunnels, NULL,
8548 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
8549 sizeof (struct GNUNET_MessageHeader)},
8550 {&handle_local_show_tunnel, NULL,
8551 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
8552 sizeof (struct GNUNET_MESH_LocalMonitor)},
8558 * To be called on core init/fail.
8560 * @param cls service closure
8561 * @param server handle to the server for this service
8562 * @param identity the public identity of this peer
8565 core_init (void *cls, struct GNUNET_CORE_Handle *server,
8566 const struct GNUNET_PeerIdentity *identity)
8569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
8570 core_handle = server;
8571 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
8574 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
8575 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8577 GNUNET_i2s (identity));
8578 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8580 GNUNET_i2s (&my_full_id));
8581 GNUNET_SCHEDULER_shutdown (); // Try gracefully
8583 GNUNET_abort(); // Try harder
8590 * Method called whenever a given peer connects.
8592 * @param cls closure
8593 * @param peer peer identity this notification is about
8594 * @param atsi performance data for the connection
8595 * @param atsi_count number of records in 'atsi'
8598 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer,
8599 const struct GNUNET_ATS_Information *atsi,
8600 unsigned int atsi_count)
8602 struct MeshPeerInfo *peer_info;
8603 struct MeshPeerPath *path;
8605 DEBUG_CONN ("Peer connected\n");
8606 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
8607 peer_info = peer_info_get (peer);
8608 if (myid == peer_info->id)
8610 DEBUG_CONN (" (self)\n");
8615 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
8617 path = path_new (2);
8618 path->peers[0] = myid;
8619 path->peers[1] = peer_info->id;
8620 GNUNET_PEER_change_rc (myid, 1);
8621 GNUNET_PEER_change_rc (peer_info->id, 1);
8622 peer_info_add_path (peer_info, path, GNUNET_YES);
8623 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
8629 * Method called whenever a peer disconnects.
8631 * @param cls closure
8632 * @param peer peer identity this notification is about
8635 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
8637 struct MeshPeerInfo *pi;
8638 struct MeshPeerQueue *q;
8639 struct MeshPeerQueue *n;
8641 DEBUG_CONN ("Peer disconnected\n");
8642 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
8652 /* TODO try to reroute this traffic instead */
8653 queue_destroy(q, GNUNET_YES);
8656 if (NULL != pi->core_transmit)
8658 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
8659 pi->core_transmit = NULL;
8661 peer_info_remove_path (pi, pi->id, myid);
8664 DEBUG_CONN (" (self)\n");
8666 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
8671 /******************************************************************************/
8672 /************************ MAIN FUNCTIONS ****************************/
8673 /******************************************************************************/
8676 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
8678 * @param cls closure
8679 * @param key current key code
8680 * @param value value in the hash map
8681 * @return GNUNET_YES if we should continue to iterate,
8685 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
8687 struct MeshTunnel *t = value;
8694 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
8696 * @param cls closure
8697 * @param key current key code
8698 * @param value value in the hash map
8699 * @return GNUNET_YES if we should continue to iterate,
8703 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
8705 struct MeshPeerInfo *p = value;
8706 struct MeshPeerQueue *q;
8707 struct MeshPeerQueue *n;
8715 queue_destroy(q, GNUNET_YES);
8719 peer_info_destroy (p);
8725 * Task run during shutdown.
8731 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
8733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
8735 if (core_handle != NULL)
8737 GNUNET_CORE_disconnect (core_handle);
8742 GNUNET_CRYPTO_rsa_key_create_stop (keygen);
8745 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
8746 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
8747 if (dht_handle != NULL)
8749 GNUNET_DHT_disconnect (dht_handle);
8754 GNUNET_SERVER_notification_context_destroy (nc);
8757 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
8759 GNUNET_SCHEDULER_cancel (announce_id_task);
8760 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
8762 if (GNUNET_SCHEDULER_NO_TASK != announce_applications_task)
8764 GNUNET_SCHEDULER_cancel (announce_applications_task);
8765 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
8767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
8772 * Callback for hostkey read/generation
8774 * @param cls Closure (Configuration handle).
8775 * @param pk the private key
8776 * @param emsg error message
8779 key_generation_cb (void *cls,
8780 struct GNUNET_CRYPTO_RsaPrivateKey *pk,
8783 const struct GNUNET_CONFIGURATION_Handle *c = cls;
8784 struct MeshPeerInfo *peer;
8785 struct MeshPeerPath *p;
8790 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8791 _("Mesh service could not access hostkey: %s. Exiting.\n"),
8793 GNUNET_SCHEDULER_shutdown ();
8796 my_private_key = pk;
8797 GNUNET_CRYPTO_rsa_key_get_public (my_private_key, &my_public_key);
8798 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
8799 &my_full_id.hashPubKey);
8800 myid = GNUNET_PEER_intern (&my_full_id);
8801 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
8802 "Mesh for peer [%s] starting\n",
8803 GNUNET_i2s(&my_full_id));
8805 // transport_handle = GNUNET_TRANSPORT_connect(c,
8812 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
8813 NULL, /* Closure passed to MESH functions */
8814 &core_init, /* Call core_init once connected */
8815 &core_connect, /* Handle connects */
8816 &core_disconnect, /* remove peers on disconnects */
8817 NULL, /* Don't notify about all incoming messages */
8818 GNUNET_NO, /* For header only in notification */
8819 NULL, /* Don't notify about all outbound messages */
8820 GNUNET_NO, /* For header-only out notification */
8821 core_handlers); /* Register these handlers */
8823 if (core_handle == NULL)
8826 GNUNET_SCHEDULER_shutdown ();
8831 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
8834 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
8835 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
8836 GNUNET_SERVER_disconnect_notify (server_handle,
8837 &handle_local_client_disconnect, NULL);
8841 clients_tail = NULL;
8844 announce_applications_task = GNUNET_SCHEDULER_NO_TASK;
8845 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
8847 /* Create a peer_info for the local peer */
8848 peer = peer_info_get (&my_full_id);
8851 GNUNET_PEER_change_rc (myid, 1);
8852 peer_info_add_path (peer, p, GNUNET_YES);
8853 GNUNET_SERVER_resume (server_handle);
8854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
8859 * Process mesh requests.
8861 * @param cls closure
8862 * @param server the initialized server
8863 * @param c configuration to use
8866 run (void *cls, struct GNUNET_SERVER_Handle *server,
8867 const struct GNUNET_CONFIGURATION_Handle *c)
8871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
8872 server_handle = server;
8875 GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
8878 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8880 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8882 GNUNET_SCHEDULER_shutdown ();
8887 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
8888 &refresh_path_time))
8890 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8892 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8893 "mesh", "refresh path time");
8894 GNUNET_SCHEDULER_shutdown ();
8899 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "APP_ANNOUNCE_TIME",
8900 &app_announce_time))
8902 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8904 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8905 "mesh", "app announce time");
8906 GNUNET_SCHEDULER_shutdown ();
8909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
8910 "APP_ANNOUNCE_TIME %llu ms\n",
8911 app_announce_time.rel_value);
8913 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
8916 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8918 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8919 "mesh", "id announce time");
8920 GNUNET_SCHEDULER_shutdown ();
8925 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
8928 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8930 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8931 "mesh", "connect timeout");
8932 GNUNET_SCHEDULER_shutdown ();
8937 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
8940 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8942 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8943 "mesh", "max msgs queue");
8944 GNUNET_SCHEDULER_shutdown ();
8949 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
8952 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
8954 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
8955 "mesh", "max tunnels");
8956 GNUNET_SCHEDULER_shutdown ();
8961 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
8964 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8966 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8967 "mesh", "default ttl", 64);
8972 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
8975 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8976 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8977 "mesh", "max peers", 1000);
8982 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
8983 &dht_replication_level))
8985 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
8987 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
8988 "mesh", "dht replication level", 3);
8989 dht_replication_level = 3;
8992 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8993 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8994 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8995 applications = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8996 types = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
8998 dht_handle = GNUNET_DHT_connect (c, 64);
8999 if (NULL == dht_handle)
9003 stats = GNUNET_STATISTICS_create ("mesh", c);
9005 GNUNET_SERVER_suspend (server_handle);
9006 /* Scheduled the task to clean up when shutdown is called */
9007 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
9009 keygen = GNUNET_CRYPTO_rsa_key_create_start (keyfile,
9012 GNUNET_free (keyfile);
9017 * The main function for the mesh service.
9019 * @param argc number of arguments from the command line
9020 * @param argv command line arguments
9021 * @return 0 ok, 1 on error
9024 main (int argc, char *const *argv)
9029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
9030 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
9032 ret = (GNUNET_OK == r) ? 0 : 1;
9033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
9037 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
9038 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
9039 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);