2 This file is part of GNUnet.
3 (C) 2001-2012 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
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 "mesh2_protocol.h"
51 #include "mesh_tunnel_tree.h"
52 #include "block_mesh.h"
53 #include "gnunet_dht_service.h"
54 #include "gnunet_statistics_service.h"
56 #define MESH_BLOOM_SIZE 128
58 #define MESH_DEBUG_DHT GNUNET_NO
59 #define MESH_DEBUG_CONNECTION GNUNET_NO
60 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
62 #define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\
63 GNUNET_TIME_UNIT_MINUTES,\
66 #if MESH_DEBUG_CONNECTION
67 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
69 #define DEBUG_CONN(...)
73 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
75 #define DEBUG_DHT(...)
82 struct timespec __mesh_start;
83 struct timespec __mesh_end;
84 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
85 #define INTERVAL_END \
87 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
88 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
89 if (__diff < 0) __diff += 1000000000;\
93 #define INTERVAL_SHOW \
95 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
97 #define INTERVAL_START
102 /******************************************************************************/
103 /************************ DATA STRUCTURES ****************************/
104 /******************************************************************************/
106 /** FWD declaration */
112 * Struct containing info about a queued transmission to this peer
119 struct MeshPeerQueue *next;
124 struct MeshPeerQueue *prev;
127 * Peer this transmission is directed to.
129 struct MeshPeerInfo *peer;
132 * Tunnel this message belongs to.
134 struct MeshTunnel *tunnel;
137 * Pointer to info stucture used as cls.
147 * Size of the message
154 * Struct containing all info possibly needed to build a package when called
157 struct MeshTransmissionDescriptor
159 /** ID of the tunnel this packet travels in */
160 struct MESH_TunnelID *origin;
162 /** Who was this message being sent to */
163 struct MeshPeerInfo *peer;
165 /** Ultimate destination of the packet */
166 GNUNET_PEER_Id destination;
168 /** Tunnel it belongs to. */
169 struct MeshTunnel *t;
171 /** Size of the data. */
180 * Struct containing all information regarding a given peer
190 * Last time we heard from this peer
192 struct GNUNET_TIME_Absolute last_contact;
195 * Number of attempts to reconnect so far
197 int n_reconnect_attempts;
200 * Paths to reach the peer, ordered by ascending hop count
202 struct MeshPeerPath *path_head;
205 * Paths to reach the peer, ordered by ascending hop count
207 struct MeshPeerPath *path_tail;
210 * Handle to stop the DHT search for a path to this peer
212 struct GNUNET_DHT_GetHandle *dhtget;
215 * Array of tunnels this peer is the target of.
216 * Most probably a small amount, therefore not a hashmap.
217 * When the path to the peer changes, notify these tunnels to let them
218 * re-adjust their path trees.
220 struct MeshTunnel **tunnels;
223 * Number of tunnels this peers participates in
225 unsigned int ntunnels;
228 * Transmission queue to core DLL head
230 struct MeshPeerQueue *queue_head;
233 * Transmission queue to core DLL tail
235 struct MeshPeerQueue *queue_tail;
238 * How many messages are in the queue to this peer.
240 unsigned int queue_n;
243 * Handle to for queued transmissions
245 struct GNUNET_CORE_TransmitHandle *core_transmit;
250 * Globally unique tunnel identification (owner + number)
251 * DO NOT USE OVER THE NETWORK
256 * Node that owns the tunnel
261 * Tunnel number to differentiate all the tunnels owned by the node oid
262 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
264 MESH_TunnelNumber tid;
269 * Struct containing all information regarding a tunnel
270 * For an intermediate node the improtant info used will be:
271 * - id Tunnel unique identification
272 * - paths[0] To know where to send it next
273 * - metainfo: ready, speeds, accounting
280 struct MESH_TunnelID id;
283 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
285 MESH_TunnelNumber local_tid;
288 * Local tunnel number for local destination clients (incoming number)
289 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
292 MESH_TunnelNumber local_tid_dest;
295 * Is the tunnel bufferless (minimum latency)?
300 * Packet ID of the last fwd packet seen (sent/retransmitted/received).
305 * Packet ID of the last bck packet sent (unique counter per hop).
310 * Force sending ACK? Flag to allow duplicate ACK on POLL.
315 * Last ACK sent towards the origin (for traffic towards leaf node).
317 uint32_t last_fwd_ack;
320 * BCK ACK value received from the hop towards the owner of the tunnel,
321 * (previous node / owner): up to what message PID can we sent back to him.
326 * How many messages are in the forward queue (towards leaves).
328 unsigned int fwd_queue_n;
331 * How many messages do we accept in the forward queue.
333 unsigned int fwd_queue_max;
336 * How many messages are in the backward queue (towards origin).
338 unsigned int bck_queue_n;
341 * How many messages do we accept in the backward queue.
343 unsigned int bck_queue_max;
346 * Task to poll peer in case of a stall.
348 GNUNET_SCHEDULER_TaskIdentifier fc_poll_bck;
351 * Last time the tunnel was used
353 struct GNUNET_TIME_Absolute timestamp;
356 * Peer of the tunnel.
361 * Next hop in the tunnel.
363 GNUNET_PEER_Id next_hop;
366 * Previous hop in the tunnel.
368 GNUNET_PEER_Id prev_hop;
371 * Client owner of the tunnel, if any
373 struct MeshClient *owner;
376 * Clients that have been informed about and want to stay in the tunnel.
378 struct MeshClient **clients;
381 * Flow control info for each client.
383 struct MeshTunnelClientInfo *clients_fc;
386 * Number of elements in clients/clients_fc
388 unsigned int nclients;
391 * Clients that have been informed but requested to leave the tunnel.
393 struct MeshClient **ignore;
396 * Number of elements in clients
398 unsigned int nignore;
401 * Path being used for the tunnel.
403 struct MeshPeerPath *path;
406 * Task to keep the used paths alive
408 GNUNET_SCHEDULER_TaskIdentifier path_refresh_task;
411 * Task to destroy the tunnel after timeout
413 * FIXME: merge the two? a tunnel will have either
414 * a path refresh OR a timeout, never both!
416 GNUNET_SCHEDULER_TaskIdentifier timeout_task;
419 * Flag to signal the destruction of the tunnel.
420 * If this is set GNUNET_YES the tunnel will be destroyed
421 * when the queue is empty.
426 * Total messages pending for this tunnels, payload or not.
428 unsigned int pending_messages;
431 * If the tunnel is empty, destoy it.
433 GNUNET_SCHEDULER_TaskIdentifier delayed_destroy;
438 * Info about a leaf client of a tunnel, needed to perform flow control.
440 struct MeshTunnelClientInfo
443 * PID of the last packet sent to the client (FWD).
448 * PID of the last packet received from the client (BCK).
453 * Maximum PID allowed (FWD ACK received).
458 * Last ACK sent to that child (BCK ACK).
465 * Struct containing information about a client of the service
472 struct MeshClient *next;
477 struct MeshClient *prev;
480 * Tunnels that belong to this client, indexed by local id
482 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
485 * Tunnels this client has accepted, indexed by incoming local id
487 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
490 * Tunnels this client has rejected, indexed by incoming local id
492 struct GNUNET_CONTAINER_MultiHashMap *ignore_tunnels;
494 * Handle to communicate with the client
496 struct GNUNET_SERVER_Client *handle;
499 * Messages that this client has declared interest in
501 struct GNUNET_CONTAINER_MultiHashMap *types;
504 * Whether the client is active or shutting down (don't send confirmations
505 * to a client that is shutting down.
510 * ID of the client, mainly for debug messages
517 /******************************************************************************/
518 /************************ DEBUG FUNCTIONS ****************************/
519 /******************************************************************************/
523 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
524 * @param cls string to print
525 * @param success GNUNET_OK if the PUT was transmitted,
526 * GNUNET_NO on timeout,
527 * GNUNET_SYSERR on disconnect from service
528 * after the PUT message was transmitted
529 * (so we don't know if it was received or not)
534 mesh_debug (void *cls, int success)
538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
542 unsigned int debug_fwd_ack;
543 unsigned int debug_bck_ack;
547 /******************************************************************************/
548 /*********************** GLOBAL VARIABLES ****************************/
549 /******************************************************************************/
551 /************************** Configuration parameters **************************/
554 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
556 static struct GNUNET_TIME_Relative refresh_path_time;
559 * How often to PUT own ID in the DHT.
561 static struct GNUNET_TIME_Relative id_announce_time;
564 * Maximum time allowed to connect to a peer found by string.
566 static struct GNUNET_TIME_Relative connect_timeout;
569 * Default TTL for payload packets.
571 static unsigned long long default_ttl;
574 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
576 static unsigned long long dht_replication_level;
579 * How many tunnels are we willing to maintain.
580 * Local tunnels are always allowed, even if there are more tunnels than max.
582 static unsigned long long max_tunnels;
585 * How many messages *in total* are we willing to queue, divided by number of
586 * tunnels to get tunnel queue size.
588 static unsigned long long max_msgs_queue;
591 * How many peers do we want to remember?
593 static unsigned long long max_peers;
596 /*************************** Static global variables **************************/
599 * Hostkey generation context
601 static struct GNUNET_CRYPTO_EccKeyGenerationContext *keygen;
604 * DLL with all the clients, head.
606 static struct MeshClient *clients_head;
609 * DLL with all the clients, tail.
611 static struct MeshClient *clients_tail;
614 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
616 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
619 * Number of tunnels known.
621 static unsigned long long n_tunnels;
624 * Tunnels incoming, indexed by MESH_TunnelNumber
625 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
627 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
630 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
632 static struct GNUNET_CONTAINER_MultiHashMap *peers;
635 * Handle to communicate with transport
637 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
640 * Handle to communicate with core.
642 static struct GNUNET_CORE_Handle *core_handle;
647 static struct GNUNET_DHT_Handle *dht_handle;
652 static struct GNUNET_SERVER_Handle *server_handle;
655 * Handle to the statistics service.
657 static struct GNUNET_STATISTICS_Handle *stats;
660 * Notification context, to send messages to local clients.
662 static struct GNUNET_SERVER_NotificationContext *nc;
665 * Local peer own ID (memory efficient handle).
667 static GNUNET_PEER_Id myid;
670 * Local peer own ID (full value).
672 static struct GNUNET_PeerIdentity my_full_id;
677 static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
682 static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key;
685 * Tunnel ID for the next created tunnel (global tunnel number).
687 static MESH_TunnelNumber next_tid;
690 * Tunnel ID for the next incoming tunnel (local tunnel number).
692 static MESH_TunnelNumber next_local_tid;
695 * All message types clients of this peer are interested in.
697 static struct GNUNET_CONTAINER_MultiHashMap *types;
700 * Task to periodically announce itself in the network.
702 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
705 * Next ID to assign to a client.
707 unsigned int next_client_id;
710 /******************************************************************************/
711 /*********************** DECLARATIONS **************************/
712 /******************************************************************************/
715 * Function to process paths received for a new peer addition. The recorded
716 * paths form the initial tunnel, which can be optimized later.
717 * Called on each result obtained for the DHT search.
720 * @param exp when will this value expire
721 * @param key key of the result
722 * @param type type of the result
723 * @param size number of bytes in data
724 * @param data pointer to the result data
727 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
728 const struct GNUNET_HashCode * key,
729 const struct GNUNET_PeerIdentity *get_path,
730 unsigned int get_path_length,
731 const struct GNUNET_PeerIdentity *put_path,
732 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
733 size_t size, const void *data);
737 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
738 * and insert it in the appropiate structures if the peer is not known yet.
740 * @param peer Full identity of the peer.
742 * @return Existing or newly created peer info.
744 static struct MeshPeerInfo *
745 peer_get (const struct GNUNET_PeerIdentity *peer);
749 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
750 * and insert it in the appropiate structures if the peer is not known yet.
752 * @param peer Short identity of the peer.
754 * @return Existing or newly created peer info.
756 static struct MeshPeerInfo *
757 peer_get_short (const GNUNET_PEER_Id peer);
761 * Build a PeerPath from the paths returned from the DHT, reversing the paths
762 * to obtain a local peer -> destination path and interning the peer ids.
764 * @return Newly allocated and created path
766 static struct MeshPeerPath *
767 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
768 unsigned int get_path_length,
769 const struct GNUNET_PeerIdentity *put_path,
770 unsigned int put_path_length);
774 * Adds a path to the peer_infos of all the peers in the path
776 * @param p Path to process.
777 * @param confirmed Whether we know if the path works or not.
780 path_add_to_peers (struct MeshPeerPath *p, int confirmed);
785 * Search for a tunnel by global ID using full PeerIdentities.
787 * @param oid owner of the tunnel.
788 * @param tid global tunnel number.
790 * @return tunnel handler, NULL if doesn't exist.
792 static struct MeshTunnel *
793 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
797 * Delete an active client from the tunnel.
803 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c);
806 * Notify a tunnel that a connection has broken that affects at least
809 * @param t Tunnel affected.
810 * @param p1 Peer that got disconnected from p2.
811 * @param p2 Peer that got disconnected from p1.
813 * @return Short ID of the peer disconnected (either p1 or p2).
814 * 0 if the tunnel remained unaffected.
816 static GNUNET_PEER_Id
817 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
822 * Get the current ack value for a tunnel, for data going from root to leaves,
823 * taking in account the tunnel mode and the status of all children and clients.
827 * @return Maximum PID allowed.
830 tunnel_get_fwd_ack (struct MeshTunnel *t);
834 * Add a client to a tunnel, initializing all needed data structures.
836 * @param t Tunnel to which add the client.
837 * @param c Client which to add to the tunnel.
840 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c);
844 * .Use the given path for the tunnel.
846 * @param t Tunnel to update.
847 * @param p Path to use.
850 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p);
853 * @brief Queue and pass message to core when possible.
855 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
856 * and accounts for it. In case the queue is full, the message is dropped and
859 * Otherwise, message is treated as internal and allowed to go regardless of
862 * @param cls Closure (@c type dependant). It will be used by queue_send to
863 * build the message to be sent if not already prebuilt.
864 * @param type Type of the message, 0 for a raw message.
865 * @param size Size of the message.
866 * @param dst Neighbor to send message to.
867 * @param t Tunnel this message belongs to.
870 queue_add (void *cls, uint16_t type, size_t size,
871 struct MeshPeerInfo *dst, struct MeshTunnel *t);
875 * Free a transmission that was already queued with all resources
876 * associated to the request.
878 * @param queue Queue handler to cancel.
879 * @param clear_cls Is it necessary to free associated cls?
882 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
886 * @brief Get the next transmittable message from the queue.
888 * This will be the head, except in the case of being a data packet
889 * not allowed by the destination peer.
891 * @param peer Destination peer.
893 * @return The next viable MeshPeerQueue element to send to that peer.
894 * NULL when there are no transmittable messages.
896 struct MeshPeerQueue *
897 queue_get_next (const struct MeshPeerInfo *peer);
901 * Core callback to write a queued packet to core buffer
903 * @param cls Closure (peer info).
904 * @param size Number of bytes available in buf.
905 * @param buf Where the to write the message.
907 * @return number of bytes written to buf
910 queue_send (void *cls, size_t size, void *buf);
913 /******************************************************************************/
914 /************************ PERIODIC FUNCTIONS ****************************/
915 /******************************************************************************/
918 * Periodically announce self id in the DHT
921 * @param tc task context
924 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
928 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
930 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
934 * - Set data expiration in function of X
937 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
939 block.id = my_full_id;
940 block.type = htonl (0);
941 GNUNET_DHT_put (dht_handle, /* DHT handle */
942 &my_full_id.hashPubKey, /* Key to use */
943 dht_replication_level, /* Replication level */
944 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
945 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
946 sizeof (block), /* Size of the data */
947 (const char *) &block, /* Data itself */
948 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
949 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
950 NULL, /* Continuation */
951 NULL); /* Continuation closure */
953 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
957 /******************************************************************************/
958 /****************** GENERAL HELPER FUNCTIONS ************************/
959 /******************************************************************************/
963 * Check if client has registered with the service and has not disconnected
965 * @param client the client to check
967 * @return non-NULL if client exists in the global DLL
969 static struct MeshClient *
970 client_get (struct GNUNET_SERVER_Client *client)
972 struct MeshClient *c;
977 if (c->handle == client)
986 * Checks if a given client has subscribed to certain message type
988 * @param message_type Type of message to check
989 * @param c Client to check
991 * @return GNUNET_YES or GNUNET_NO, depending on subscription status
993 * FIXME: use of crypto_hash slows it down
994 * The hash function alone takes 8-10us out of the ~55us for the whole
995 * process of retransmitting the message from one local client to another.
996 * Find faster implementation!
999 client_is_subscribed (uint16_t message_type, struct MeshClient *c)
1001 struct GNUNET_HashCode hc;
1003 if (NULL == c->types)
1006 GNUNET_CRYPTO_hash (&message_type, sizeof (uint16_t), &hc);
1007 return GNUNET_CONTAINER_multihashmap_contains (c->types, &hc);
1012 * Check whether client wants traffic from a tunnel.
1014 * @param c Client to check.
1015 * @param t Tunnel to be found.
1017 * @return GNUNET_YES if client knows tunnel.
1019 * TODO look in client hashmap
1022 client_wants_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1026 for (i = 0; i < t->nclients; i++)
1027 if (t->clients[i] == c)
1034 * Check whether client has been informed about a tunnel.
1036 * @param c Client to check.
1037 * @param t Tunnel to be found.
1039 * @return GNUNET_YES if client knows tunnel.
1041 * TODO look in client hashmap
1044 client_knows_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1048 for (i = 0; i < t->nignore; i++)
1049 if (t->ignore[i] == c)
1051 return client_wants_tunnel(c, t);
1056 * Marks a client as uninterested in traffic from the tunnel, updating both
1057 * client and tunnel to reflect this.
1059 * @param c Client that doesn't want traffic anymore.
1060 * @param t Tunnel which should be ignored.
1062 * FIXME when to delete an incoming tunnel?
1065 client_ignore_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1067 struct GNUNET_HashCode hash;
1069 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1070 GNUNET_break (GNUNET_YES ==
1071 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1073 GNUNET_break (GNUNET_YES ==
1074 GNUNET_CONTAINER_multihashmap_put (c->ignore_tunnels, &hash, t,
1075 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1076 tunnel_delete_active_client (t, c);
1077 GNUNET_array_append (t->ignore, t->nignore, c);
1082 * Deletes a tunnel from a client (either owner or destination). To be used on
1083 * tunnel destroy, otherwise, use client_ignore_tunnel.
1085 * @param c Client whose tunnel to delete.
1086 * @param t Tunnel which should be deleted.
1089 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1091 struct GNUNET_HashCode hash;
1095 GNUNET_CRYPTO_hash(&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
1096 GNUNET_assert (GNUNET_YES ==
1097 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
1103 GNUNET_CRYPTO_hash(&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
1105 GNUNET_assert (GNUNET_YES ==
1106 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
1110 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels,
1118 * Send the message to all clients that have subscribed to its type
1120 * @param msg Pointer to the message itself
1121 * @param payload Pointer to the payload of the message.
1122 * @param t The tunnel to whose clients this message goes.
1124 * @return number of clients this message was sent to
1127 send_subscribed_clients (const struct GNUNET_MessageHeader *msg,
1128 const struct GNUNET_MessageHeader *payload,
1129 struct MeshTunnel *t)
1131 struct MeshClient *c;
1132 MESH_TunnelNumber *tid;
1135 char cbuf[htons (msg->size)];
1137 type = ntohs (payload->type);
1138 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending to clients...\n");
1139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "message of type %s\n",
1140 GNUNET_MESH_DEBUG_M2S (type));
1142 memcpy (cbuf, msg, sizeof (cbuf));
1143 switch (htons (msg->type))
1145 struct GNUNET_MESH_Unicast *uc;
1146 struct GNUNET_MESH_ToOrigin *to;
1148 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1149 uc = (struct GNUNET_MESH_Unicast *) cbuf;
1152 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1153 to = (struct GNUNET_MESH_ToOrigin *) cbuf;
1161 for (count = 0, c = clients_head; c != NULL; c = c->next)
1163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u\n", c->id);
1164 if (client_is_subscribed (type, c))
1166 if (htons (msg->type) == GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN)
1170 *tid = htonl (t->local_tid);
1174 if (GNUNET_NO == client_knows_tunnel (c, t))
1176 /* This client doesn't know the tunnel */
1177 struct GNUNET_MESH_TunnelNotification tmsg;
1178 struct GNUNET_HashCode hash;
1180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending tunnel create\n");
1181 tmsg.header.size = htons (sizeof (tmsg));
1182 tmsg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1183 GNUNET_PEER_resolve (t->id.oid, &tmsg.peer);
1184 tmsg.tunnel_id = htonl (t->local_tid_dest);
1186 if (GNUNET_YES == t->nobuffer)
1187 tmsg.opt |= MESH_TUNNEL_OPT_NOBUFFER;
1188 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1189 &tmsg.header, GNUNET_NO);
1190 tunnel_add_client (t, c);
1191 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber),
1193 GNUNET_break (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put (
1194 c->incoming_tunnels, &hash, t,
1195 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
1197 *tid = htonl (t->local_tid_dest);
1200 /* Check if the client wants to get traffic from the tunnel */
1201 if (GNUNET_NO == client_wants_tunnel(c, t))
1204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending\n");
1205 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1206 (struct GNUNET_MessageHeader
1207 *) cbuf, GNUNET_NO);
1216 * Notify all clients (not depending on registration status) that the incoming
1217 * tunnel is no longer valid.
1219 * @param t Tunnel that was destroyed.
1222 send_clients_tunnel_destroy (struct MeshTunnel *t)
1224 struct GNUNET_MESH_TunnelMessage msg;
1226 msg.header.size = htons (sizeof (msg));
1227 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1228 msg.tunnel_id = htonl (t->local_tid_dest);
1229 GNUNET_SERVER_notification_context_broadcast (nc, &msg.header, GNUNET_NO);
1234 * Notify clients of tunnel disconnections, if needed.
1235 * In case the origin disconnects, the destination clients get a tunnel destroy
1236 * notification. If the last destination disconnects (only one remaining client
1237 * in tunnel), the origin gets a (local ID) peer disconnected.
1238 * Note that the function must be called BEFORE removing the client from
1241 * @param t Tunnel that was destroyed.
1242 * @param c Client that disconnected.
1245 send_client_tunnel_disconnect (struct MeshTunnel *t, struct MeshClient *c)
1251 struct GNUNET_MESH_TunnelMessage msg;
1253 msg.header.size = htons (sizeof (msg));
1254 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1255 msg.tunnel_id = htonl (t->local_tid_dest);
1256 for (i = 0; i < t->nclients; i++)
1257 GNUNET_SERVER_notification_context_unicast (nc, t->clients[i]->handle,
1258 &msg.header, GNUNET_NO);
1260 // FIXME when to disconnect an incoming tunnel?
1265 * Iterator over all the peers to remove the oldest not-used entry.
1267 * @param cls Closure (unsued).
1268 * @param key ID of the peer.
1269 * @param value Peer_Info of the peer.
1274 peer_info_timeout (void *cls,
1275 const struct GNUNET_HashCode *key,
1282 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1283 * and insert it in the appropiate structures if the peer is not known yet.
1285 * @param peer Full identity of the peer.
1287 * @return Existing or newly created peer info.
1289 static struct MeshPeerInfo *
1290 peer_get (const struct GNUNET_PeerIdentity *peer)
1292 struct MeshPeerInfo *peer_info;
1294 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1295 if (NULL == peer_info)
1298 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1299 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1301 GNUNET_CONTAINER_multihashmap_iterate (peers,
1305 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1306 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1307 peer_info->id = GNUNET_PEER_intern (peer);
1309 peer_info->last_contact = GNUNET_TIME_absolute_get();
1316 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1317 * and insert it in the appropiate structures if the peer is not known yet.
1319 * @param peer Short identity of the peer.
1321 * @return Existing or newly created peer info.
1323 static struct MeshPeerInfo *
1324 peer_get_short (const GNUNET_PEER_Id peer)
1326 struct GNUNET_PeerIdentity id;
1328 GNUNET_PEER_resolve (peer, &id);
1329 return peer_get (&id);
1334 * Choose the best path towards a peer considering the tunnel properties.
1336 * @param peer The destination peer.
1337 * @param t The tunnel the path is for.
1339 * @return Best current known path towards the peer, if any.
1341 static struct MeshPeerPath *
1342 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1344 struct MeshPeerPath *best_p;
1345 struct MeshPeerPath *p;
1346 unsigned int best_cost;
1349 best_p = p = peer->path_head;
1350 best_cost = cost = p->length;
1353 if ((cost = p->length) < best_cost)
1365 * Remove the tunnel from the list of tunnels to which a peer is target.
1367 * @param peer PeerInfo of the peer.
1368 * @param t Tunnel to remove.
1371 peer_remove_tunnel (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1375 for (i = 0; i < peer->ntunnels; i++)
1378 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1381 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1383 GNUNET_realloc (peer->tunnels,
1384 peer->ntunnels * sizeof(struct MeshTunnel *));
1392 * Core callback to write a pre-constructed data packet to core buffer
1394 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1395 * @param size Number of bytes available in buf.
1396 * @param buf Where the to write the message.
1398 * @return number of bytes written to buf
1401 send_core_data_raw (void *cls, size_t size, void *buf)
1403 struct MeshTransmissionDescriptor *info = cls;
1404 struct GNUNET_MessageHeader *msg;
1407 GNUNET_assert (NULL != info);
1408 msg = (struct GNUNET_MessageHeader *) info->data;
1409 total_size = ntohs (msg->size);
1411 if (total_size > size)
1416 memcpy (buf, msg, total_size);
1417 GNUNET_free (info->data);
1424 * Sends an already built message to a peer, properly registrating
1425 * all used resources.
1427 * @param message Message to send. Function makes a copy of it.
1428 * @param peer Short ID of the neighbor whom to send the message.
1429 * @param t Tunnel on which this message is transmitted.
1432 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1433 GNUNET_PEER_Id peer,
1434 struct MeshTunnel *t)
1436 struct MeshTransmissionDescriptor *info;
1437 struct GNUNET_PeerIdentity id;
1438 struct MeshPeerInfo *neighbor;
1439 struct MeshPeerPath *p;
1443 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1448 size = ntohs (message->size);
1449 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
1450 info->data = GNUNET_malloc (size);
1451 memcpy (info->data, message, size);
1452 type = ntohs(message->type);
1455 struct GNUNET_MESH_Unicast *m;
1456 struct GNUNET_MESH_ToOrigin *to;
1458 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1459 m = (struct GNUNET_MESH_Unicast *) info->data;
1460 m->ttl = htonl (ntohl (m->ttl) - 1);
1462 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1463 to = (struct GNUNET_MESH_ToOrigin *) info->data;
1465 to->pid = htonl(t->bck_pid);
1467 info->data_len = size;
1468 GNUNET_PEER_resolve (peer, &id);
1469 neighbor = peer_get (&id);
1470 for (p = neighbor->path_head; NULL != p; p = p->next)
1480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1481 " %s IS NOT DIRECTLY CONNECTED\n",
1483 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1486 for (p = neighbor->path_head; NULL != p; p = p->next)
1488 struct GNUNET_PeerIdentity debug_id;
1491 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1492 " path with %u hops through:\n",
1494 for (i = 0; i < p->length; i++)
1496 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1499 i, GNUNET_i2s(&debug_id));
1503 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
1504 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1505 " no direct connection to %s\n",
1507 GNUNET_free (info->data);
1511 info->peer = neighbor;
1512 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1523 * Sends a CREATE PATH message for a path to a peer, properly registrating
1524 * all used resources.
1526 * @param peer PeerInfo of the final peer for whom this path is being created.
1527 * @param p Path itself.
1528 * @param t Tunnel for which the path is created.
1531 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
1532 struct MeshTunnel *t)
1534 struct MeshPeerInfo *neighbor;
1542 neighbor = peer_get_short (t->next_hop);
1544 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1545 sizeof (struct GNUNET_MESH_ManipulatePath) +
1546 (p->length * sizeof (struct GNUNET_PeerIdentity)),
1553 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1555 * @param t Tunnel which to confirm.
1558 send_path_ack (struct MeshTunnel *t)
1560 struct MeshTransmissionDescriptor *info;
1561 struct GNUNET_PeerIdentity id;
1563 GNUNET_PEER_resolve (t->prev_hop, &id);
1564 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
1565 info->origin = &t->id;
1566 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1567 GNUNET_assert (NULL != info->peer);
1570 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1571 sizeof (struct GNUNET_MESH_PathACK),
1578 * Try to establish a new connection to this peer in the fiven tunnel.
1579 * If the peer doesn't have any path to it yet, try to get one.
1580 * If the peer already has some path, send a CREATE PATH towards it.
1582 * @param peer PeerInfo of the peer.
1583 * @param t Tunnel for which to create the path, if possible.
1586 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1588 struct MeshPeerPath *p;
1590 if (NULL != peer->path_head)
1592 p = peer_get_best_path (peer, t);
1593 tunnel_use_path (t, p);
1594 send_create_path (peer, p, t);
1596 else if (NULL == peer->dhtget)
1598 struct GNUNET_PeerIdentity id;
1600 GNUNET_PEER_resolve (peer->id, &id);
1601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1602 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1603 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1604 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1605 &id.hashPubKey, /* key to search */
1606 dht_replication_level, /* replication level */
1607 GNUNET_DHT_RO_RECORD_ROUTE |
1608 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1610 0, /* xquery bits */
1611 &dht_get_id_handler, peer);
1613 /* Otherwise, there is no path but the DHT get is already started. */
1618 * Destroy the peer_info and free any allocated resources linked to it
1620 * @param pi The peer_info to destroy.
1622 * @return GNUNET_OK on success
1625 peer_info_destroy (struct MeshPeerInfo *pi)
1627 struct GNUNET_PeerIdentity id;
1628 struct MeshPeerPath *p;
1629 struct MeshPeerPath *nextp;
1631 GNUNET_PEER_resolve (pi->id, &id);
1632 GNUNET_PEER_change_rc (pi->id, -1);
1635 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1638 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1639 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1641 if (NULL != pi->dhtget)
1643 GNUNET_DHT_get_stop (pi->dhtget);
1649 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1659 * Remove all paths that rely on a direct connection between p1 and p2
1660 * from the peer itself and notify all tunnels about it.
1662 * @param peer PeerInfo of affected peer.
1663 * @param p1 GNUNET_PEER_Id of one peer.
1664 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1667 * TODO: optimize (see below)
1670 peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1673 struct MeshPeerPath *p;
1674 struct MeshPeerPath *next;
1675 struct MeshPeerInfo *peer_d;
1677 unsigned int destroyed;
1680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1682 for (p = peer->path_head; NULL != p; p = next)
1685 for (i = 0; i < (p->length - 1); i++)
1687 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1688 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1690 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1700 for (i = 0; i < peer->ntunnels; i++)
1702 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1706 peer_d = peer_get_short (d);
1707 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1708 tunnel_use_path (peer->tunnels[i], next);
1709 peer_connect (peer_d, peer->tunnels[i]);
1711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1716 * Add the path to the peer and update the path used to reach it in case this
1719 * @param peer_info Destination peer to add the path to.
1720 * @param path New path to add. Last peer must be the peer in arg 1.
1721 * Path will be either used of freed if already known.
1722 * @param trusted Do we trust that this path is real?
1725 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1728 struct MeshPeerPath *aux;
1732 if ((NULL == peer_info) || (NULL == path))
1735 path_destroy (path);
1738 if (path->peers[path->length - 1] != peer_info->id)
1741 path_destroy (path);
1744 if (path->length <= 2 && GNUNET_NO == trusted)
1746 /* Only allow CORE to tell us about direct paths */
1747 path_destroy (path);
1750 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1751 for (l = 1; l < path->length; l++)
1753 if (path->peers[l] == myid)
1755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1756 for (l2 = 0; l2 < path->length - l; l2++)
1758 path->peers[l2] = path->peers[l + l2];
1763 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1768 struct GNUNET_PeerIdentity id;
1770 GNUNET_PEER_resolve (peer_info->id, &id);
1771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1772 path->length, GNUNET_i2s (&id));
1775 l = path_get_length (path);
1782 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1783 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1785 l2 = path_get_length (aux);
1788 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1789 peer_info->path_tail, aux, path);
1794 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1796 path_destroy (path);
1801 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1808 * Add the path to the origin peer and update the path used to reach it in case
1809 * this is the shortest.
1810 * The path is given in peer_info -> destination, therefore we turn the path
1811 * upside down first.
1813 * @param peer_info Peer to add the path to, being the origin of the path.
1814 * @param path New path to add after being inversed.
1815 * @param trusted Do we trust that this path is real?
1818 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1819 struct MeshPeerPath *path, int trusted)
1822 peer_info_add_path (peer_info, path, trusted);
1827 * Function called if the connection to the peer has been stalled for a while,
1828 * possibly due to a missed ACK. Poll the peer about its ACK status.
1830 * @param cls Closure (cinfo).
1831 * @param tc TaskContext.
1834 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1836 // struct GNUNET_MESH_Poll msg;
1837 // struct GNUNET_PeerIdentity id;
1838 // struct MeshTunnel *t;
1840 // cinfo->fc_poll = GNUNET_SCHEDULER_NO_TASK;
1841 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1847 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
1848 // msg.header.size = htons (sizeof (msg));
1849 // msg.tid = htonl (t->id.tid);
1850 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1851 // msg.last_ack = htonl (cinfo->fwd_ack);
1853 // GNUNET_PEER_resolve (cinfo->id, &id);
1854 // send_prebuilt_message (&msg.header, &id, cinfo->t);
1855 // cinfo->fc_poll_time = GNUNET_TIME_relative_min (
1856 // MESH_MAX_POLL_TIME,
1857 // GNUNET_TIME_relative_multiply (cinfo->fc_poll_time, 2));
1858 // cinfo->fc_poll = GNUNET_SCHEDULER_add_delayed (cinfo->fc_poll_time,
1859 // &tunnel_poll, cinfo);
1864 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1865 * to obtain a local peer -> destination path and interning the peer ids.
1867 * @return Newly allocated and created path
1869 static struct MeshPeerPath *
1870 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1871 unsigned int get_path_length,
1872 const struct GNUNET_PeerIdentity *put_path,
1873 unsigned int put_path_length)
1875 struct MeshPeerPath *p;
1881 GNUNET_PEER_change_rc (myid, 1);
1882 i = get_path_length;
1883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1884 for (i--; i >= 0; i--)
1886 id = GNUNET_PEER_intern (&get_path[i]);
1887 if (p->length > 0 && id == p->peers[p->length - 1])
1889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1890 GNUNET_PEER_change_rc (id, -1);
1894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1895 GNUNET_i2s (&get_path[i]));
1897 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1898 p->peers[p->length - 1] = id;
1901 i = put_path_length;
1902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1903 for (i--; i >= 0; i--)
1905 id = GNUNET_PEER_intern (&put_path[i]);
1908 /* PUT path went through us, so discard the path up until now and start
1909 * from here to get a much shorter (and loop-free) path.
1914 if (p->length > 0 && id == p->peers[p->length - 1])
1916 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1917 GNUNET_PEER_change_rc (id, -1);
1921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1922 GNUNET_i2s (&put_path[i]));
1924 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1925 p->peers[p->length - 1] = id;
1929 if (get_path_length > 0)
1930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1931 GNUNET_i2s (&get_path[0]));
1932 if (put_path_length > 0)
1933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1934 GNUNET_i2s (&put_path[0]));
1935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1937 for (i = 0; i < p->length; i++)
1939 struct GNUNET_PeerIdentity peer_id;
1941 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1943 GNUNET_i2s (&peer_id));
1951 * Adds a path to the peer_infos of all the peers in the path
1953 * @param p Path to process.
1954 * @param confirmed Whether we know if the path works or not.
1957 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1961 /* TODO: invert and add */
1962 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1963 for (i++; i < p->length; i++)
1965 struct MeshPeerInfo *aux;
1966 struct MeshPeerPath *copy;
1968 aux = peer_get_short (p->peers[i]);
1969 copy = path_duplicate (p);
1970 copy->length = i + 1;
1971 peer_info_add_path (aux, copy, GNUNET_NO);
1977 * Send keepalive packets for a peer
1979 * @param cls Closure (tunnel for which to send the keepalive).
1980 * @param tc Notification context.
1983 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1987 * Search for a tunnel among the incoming tunnels
1989 * @param tid the local id of the tunnel
1991 * @return tunnel handler, NULL if doesn't exist
1993 static struct MeshTunnel *
1994 tunnel_get_incoming (MESH_TunnelNumber tid)
1996 struct GNUNET_HashCode hash;
1998 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1999 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2000 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
2005 * Search for a tunnel among the tunnels for a client
2007 * @param c the client whose tunnels to search in
2008 * @param tid the local id of the tunnel
2010 * @return tunnel handler, NULL if doesn't exist
2012 static struct MeshTunnel *
2013 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2015 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2017 return tunnel_get_incoming (tid);
2021 struct GNUNET_HashCode hash;
2023 GNUNET_CRYPTO_hash (&tid, sizeof (MESH_TunnelNumber), &hash);
2024 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
2030 * Search for a tunnel by global ID using PEER_ID
2032 * @param pi owner of the tunnel
2033 * @param tid global tunnel number
2035 * @return tunnel handler, NULL if doesn't exist
2037 static struct MeshTunnel *
2038 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2040 struct MESH_TunnelID id;
2041 struct GNUNET_HashCode hash;
2046 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2047 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2052 * Search for a tunnel by global ID using full PeerIdentities
2054 * @param oid owner of the tunnel
2055 * @param tid global tunnel number
2057 * @return tunnel handler, NULL if doesn't exist
2059 static struct MeshTunnel *
2060 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2062 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2067 * Delete an active client from the tunnel.
2073 tunnel_delete_active_client (struct MeshTunnel *t, const struct MeshClient *c)
2077 for (i = 0; i < t->nclients; i++)
2079 if (t->clients[i] == c)
2081 t->clients[i] = t->clients[t->nclients - 1];
2082 t->clients_fc[i] = t->clients_fc[t->nclients - 1];
2083 GNUNET_array_grow (t->clients, t->nclients, t->nclients - 1);
2085 GNUNET_array_grow (t->clients_fc, t->nclients, t->nclients - 1);
2093 * Delete an ignored client from the tunnel.
2099 tunnel_delete_ignored_client (struct MeshTunnel *t, const struct MeshClient *c)
2103 for (i = 0; i < t->nignore; i++)
2105 if (t->ignore[i] == c)
2107 t->ignore[i] = t->ignore[t->nignore - 1];
2108 GNUNET_array_grow (t->ignore, t->nignore, t->nignore - 1);
2116 * Delete a client from the tunnel. It should be only done on
2117 * client disconnection, otherwise use client_ignore_tunnel.
2123 tunnel_delete_client (struct MeshTunnel *t, const struct MeshClient *c)
2125 tunnel_delete_ignored_client (t, c);
2126 tunnel_delete_active_client (t, c);
2131 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
2133 struct MeshTunnelClientInfo clinfo;
2135 GNUNET_array_append (t->clients, t->nclients, c);
2136 clinfo.fwd_ack = t->fwd_pid + 1;
2137 clinfo.bck_ack = t->nobuffer ? 1 : INITIAL_WINDOW_SIZE - 1;
2138 clinfo.fwd_pid = t->fwd_pid;
2139 clinfo.bck_pid = (uint32_t) -1; // Expected next: 0
2141 GNUNET_array_append (t->clients_fc, t->nclients, clinfo);
2146 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
2150 for (i = 0; i < p->length; i++)
2152 if (p->peers[i] == myid)
2155 if (i > p->length - 1)
2161 if (i < p->length - 1)
2162 t->next_hop = p->peers[i + 1];
2166 t->prev_hop = p->peers[i - 1];
2170 if (NULL != t->path)
2171 path_destroy (t->path);
2172 t->path = path_duplicate (p);
2173 if (GNUNET_SCHEDULER_NO_TASK == t->path_refresh_task)
2174 t->path_refresh_task =
2175 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
2180 * Notifies a tunnel that a connection has broken that affects at least
2181 * some of its peers. Sends a notification towards the root of the tree.
2182 * In case the peer is the owner of the tree, notifies the client that owns
2183 * the tunnel and tries to reconnect.
2185 * @param t Tunnel affected.
2186 * @param p1 Peer that got disconnected from p2.
2187 * @param p2 Peer that got disconnected from p1.
2189 * @return Short ID of the peer disconnected (either p1 or p2).
2190 * 0 if the tunnel remained unaffected.
2192 static GNUNET_PEER_Id
2193 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2196 // if (myid != p1 && myid != p2) FIXME
2201 // if (tree_get_predecessor (t->tree) != 0)
2203 // /* We are the peer still connected, notify owner of the disconnection. */
2204 // struct GNUNET_MESH_PathBroken msg;
2205 // struct GNUNET_PeerIdentity neighbor;
2207 // msg.header.size = htons (sizeof (msg));
2208 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2209 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2210 // msg.tid = htonl (t->id.tid);
2211 // msg.peer1 = my_full_id;
2212 // GNUNET_PEER_resolve (pid, &msg.peer2);
2213 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2214 // send_prebuilt_message (&msg.header, &neighbor, t);
2221 * Get the Flow Control info of a client.
2223 * @param t Tunnel on which to look.
2224 * @param c Client whose ACK to get.
2226 * @return ACK value.
2228 static struct MeshTunnelClientInfo *
2229 tunnel_get_client_fc (struct MeshTunnel *t,
2230 struct MeshClient *c)
2234 for (i = 0; i < t->nclients; i++)
2236 if (t->clients[i] != c)
2238 return &t->clients_fc[i];
2241 return NULL; // avoid compiler / coverity complaints
2246 * Set the FWD ACK value of a client in a particular tunnel.
2248 * @param t Tunnel affected.
2249 * @param c Client whose ACK to set.
2250 * @param ack ACK value.
2253 tunnel_set_client_fwd_ack (struct MeshTunnel *t,
2254 struct MeshClient *c,
2259 for (i = 0; i < t->nclients; i++)
2261 if (t->clients[i] != c)
2263 t->clients_fc[i].fwd_ack = ack;
2271 * Get the highest ACK value of all clients in a particular tunnel,
2272 * according to the buffering/speed settings.
2274 * @param t Tunnel on which to look.
2276 * @return Corresponding ACK value (max uint32_t).
2277 * If no clients are suscribed, -1LL.
2280 tunnel_get_clients_fwd_ack (struct MeshTunnel *t)
2285 if (0 == t->nclients)
2287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2288 " tunnel has no clients, no FWD ACK\n");
2292 for (ack = -1LL, i = 0; i < t->nclients; i++)
2295 GNUNET_YES == GMC_is_pid_bigger (ack, t->clients_fc[i].fwd_ack))
2297 ack = t->clients_fc[i].fwd_ack;
2301 if (GNUNET_YES == t->nobuffer && GMC_is_pid_bigger(ack, t->fwd_pid))
2302 ack = (uint32_t) t->fwd_pid + 1; // Might overflow, it's ok.
2304 return (uint32_t) ack;
2309 * Get the current fwd ack value for a tunnel, taking in account the tunnel
2310 * mode and the status of all children nodes.
2314 * @return Maximum PID allowed.
2317 tunnel_get_fwd_ack (struct MeshTunnel *t)
2321 uint32_t buffer_free;
2325 buffer_free = t->fwd_queue_max - t->fwd_queue_n;
2326 client_ack = tunnel_get_clients_fwd_ack (t);
2327 if (GNUNET_YES == t->nobuffer)
2333 ack = count + buffer_free; // Overflow? OK!
2335 if (-1LL == client_ack)
2340 ack = GMC_max_pid ((uint32_t) client_ack, ack);
2342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2343 "c %u, bf %u, cl %lld, ACK: %u\n",
2344 count, buffer_free, client_ack, ack);
2350 * Build a local ACK message and send it to a local client.
2352 * @param t Tunnel on which to send the ACK.
2353 * @param c Client to whom send the ACK.
2354 * @param ack Value of the ACK.
2357 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
2359 struct GNUNET_MESH_LocalAck msg;
2361 msg.header.size = htons (sizeof (msg));
2362 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
2363 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
2364 msg.max_pid = htonl (ack);
2365 GNUNET_SERVER_notification_context_unicast(nc,
2372 * Build an ACK message and queue it to send to the given peer.
2374 * @param t Tunnel on which to send the ACK.
2375 * @param peer Peer to whom send the ACK.
2376 * @param ack Value of the ACK.
2379 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
2381 struct GNUNET_MESH_ACK msg;
2383 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2384 msg.header.size = htons (sizeof (msg));
2385 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
2386 msg.pid = htonl (ack);
2387 msg.tid = htonl (t->id.tid);
2389 send_prebuilt_message (&msg.header, peer, t);
2394 * Notify a the owner of a tunnel about how many more
2395 * payload packages will we accept on a given tunnel.
2397 * @param t Tunnel on which to send the ACK.
2400 tunnel_send_client_fwd_ack (struct MeshTunnel *t)
2404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2405 "Sending client FWD ACK on tunnel %X\n",
2408 ack = tunnel_get_fwd_ack (t);
2410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
2411 if (t->last_fwd_ack == ack)
2413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " same as last, not sending!\n");
2417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending!\n");
2418 t->last_fwd_ack = ack;
2419 send_local_ack (t, t->owner, ack);
2424 * Send an ACK informing the predecessor about the available buffer space.
2425 * In case there is no predecessor, inform the owning client.
2426 * If buffering is off, send only on behalf of children or self if endpoint.
2427 * If buffering is on, send when sent to children and buffer space is free.
2428 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
2429 * the ACK itself goes "back" (towards root).
2431 * @param t Tunnel on which to send the ACK.
2432 * @param type Type of message that triggered the ACK transmission.
2435 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
2439 if (NULL != t->owner)
2441 tunnel_send_client_fwd_ack (t);
2444 /* Is it after unicast retransmission? */
2447 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2449 "ACK due to FWD DATA retransmission\n");
2450 if (GNUNET_YES == t->nobuffer)
2452 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
2456 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2457 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2459 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2460 t->force_ack = GNUNET_YES;
2466 /* Check if we need to transmit the ACK */
2467 if (t->fwd_queue_max > t->fwd_queue_n * 4 &&
2468 GMC_is_pid_bigger(t->last_fwd_ack, t->fwd_pid) &&
2469 GNUNET_NO == t->force_ack)
2471 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
2472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2473 " t->qmax: %u, t->qn: %u\n",
2474 t->fwd_queue_max, t->fwd_queue_n);
2475 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2476 " t->pid: %u, t->ack: %u\n",
2477 t->fwd_pid, t->last_fwd_ack);
2481 /* Ok, ACK might be necessary, what PID to ACK? */
2482 ack = tunnel_get_fwd_ack (t);
2484 /* If speed_min and not all children have ack'd, dont send yet */
2485 if (ack == t->last_fwd_ack && GNUNET_NO == t->force_ack)
2487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not ready\n");
2491 t->last_fwd_ack = ack;
2492 send_ack (t, t->prev_hop, ack);
2494 t->force_ack = GNUNET_NO;
2499 * Send a child node a BCK ACK to allow him to send more to_origin data.
2502 * @param id Id of the child node.
2505 tunnel_send_child_bck_ack (struct MeshTunnel *t,
2506 GNUNET_PEER_Id peer)
2508 uint32_t ack = 0; // FIXME
2510 // ack = cinfo->bck_pid + t->bck_queue_max - t->bck_queue_n;
2512 // if (cinfo->bck_ack == ack && GNUNET_NO == t->force_ack)
2514 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2515 // " Not sending ACK, not needed\n");
2518 // cinfo->bck_ack = ack;
2520 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2521 // " Sending BCK ACK %u (last sent: %u)\n",
2522 // ack, cinfo->bck_ack);
2523 send_ack (t, peer, ack);
2528 * @brief Send BCK ACKs to clients to allow them more to_origin traffic
2530 * Iterates over all clients and sends BCK ACKs to the ones that need it.
2532 * FIXME fc: what happens if we have 2 clients but q_size is 1?
2533 * - implement a size 1 buffer in each client_fc AND children_fc
2534 * to hold at least 1 message per "child".
2535 * problem: violates no buffer policy
2536 * - ack 0 and make "children" poll for transmission slots
2537 * problem: big overhead, extra latency even in low traffic
2540 * @param t Tunnel on which to send the BCK ACKs.
2543 tunnel_send_clients_bck_ack (struct MeshTunnel *t)
2546 unsigned int tunnel_delta;
2548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Sending BCK ACK to clients\n");
2550 tunnel_delta = t->bck_queue_max - t->bck_queue_n;
2551 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " tunnel delta: %u\n", tunnel_delta);
2553 /* Find client whom to allow to send to origin (with lowest buffer space) */
2554 for (i = 0; i < t->nclients; i++)
2556 struct MeshTunnelClientInfo *clinfo;
2559 clinfo = &t->clients_fc[i];
2560 delta = clinfo->bck_ack - clinfo->bck_pid;
2561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client %u delta: %u\n",
2562 t->clients[i]->id, delta);
2564 if ((GNUNET_NO == t->nobuffer && tunnel_delta > delta) ||
2565 (GNUNET_YES == t->nobuffer && 0 == delta))
2569 ack = clinfo->bck_pid;
2570 ack += t->nobuffer ? 1 : tunnel_delta;
2571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2572 " sending ack to client %u: %u\n",
2573 t->clients[i]->id, ack);
2574 send_local_ack (t, t->clients[i], ack);
2575 clinfo->bck_ack = ack;
2579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2580 " not sending ack to client %u (td %u, d %u)\n",
2581 t->clients[i]->id, tunnel_delta, delta);
2588 * Send an ACK informing the children nodes and destination clients about
2589 * the available buffer space.
2590 * If buffering is off, send only on behalf of root (can be self).
2591 * If buffering is on, send when sent to predecessor and buffer space is free.
2592 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
2593 * the ACK itself goes "forward" (towards children/clients).
2595 * @param t Tunnel on which to send the ACK.
2596 * @param type Type of message that triggered the ACK transmission.
2599 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
2601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2602 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
2603 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
2604 /* Is it after data to_origin retransmission? */
2607 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2608 if (GNUNET_YES == t->nobuffer)
2610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2611 " Not sending ACK, nobuffer\n");
2615 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2616 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2618 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2619 t->force_ack = GNUNET_YES;
2625 tunnel_send_clients_bck_ack (t);
2626 tunnel_send_child_bck_ack (t, t->next_hop);
2627 t->force_ack = GNUNET_NO;
2632 * @brief Re-initiate traffic to this peer if necessary.
2634 * Check if there is traffic queued towards this peer
2635 * and the core transmit handle is NULL (traffic was stalled).
2636 * If so, call core tmt rdy.
2638 * @param peer_id Short ID of peer to which initiate traffic.
2641 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2643 struct MeshPeerInfo *peer;
2644 struct GNUNET_PeerIdentity id;
2645 struct MeshPeerQueue *q;
2648 peer = peer_get_short (peer_id);
2649 if (NULL != peer->core_transmit)
2652 q = queue_get_next (peer);
2655 /* Might br multicast traffic already sent to this particular peer but
2656 * not to other children in this tunnel.
2657 * This way t->queue_n would be > 0 but the queue of this particular peer
2663 GNUNET_PEER_resolve (peer->id, &id);
2664 peer->core_transmit =
2665 GNUNET_CORE_notify_transmit_ready(core_handle,
2668 GNUNET_TIME_UNIT_FOREVER_REL,
2678 * Send a message to all peers in this tunnel that the tunnel is no longer
2681 * @param t The tunnel whose peers to notify.
2684 tunnel_send_destroy (struct MeshTunnel *t)
2686 struct GNUNET_MESH_TunnelDestroy msg;
2687 struct GNUNET_PeerIdentity id;
2689 msg.header.size = htons (sizeof (msg));
2690 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2691 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2692 msg.tid = htonl (t->id.tid);
2693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2694 " sending tunnel destroy for tunnel: %s [%X]\n",
2695 GNUNET_i2s (&msg.oid), t->id.tid);
2697 if (0 != t->next_hop)
2699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2700 GNUNET_PEER_resolve (t->next_hop, &id);
2701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2702 " sending forward to %s\n",
2704 send_prebuilt_message (&msg.header, t->next_hop, t);
2706 if (0 != t->prev_hop)
2708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2709 GNUNET_PEER_resolve (t->prev_hop, &id);
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2711 " sending back to %s\n",
2713 send_prebuilt_message (&msg.header, t->prev_hop, t);
2719 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2721 * @param t Tunnel which to cancel.
2722 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2725 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2727 struct MeshPeerInfo *peer_info;
2728 struct MeshPeerQueue *pq;
2729 struct MeshPeerQueue *next;
2731 peer_info = peer_get_short (neighbor);
2732 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2735 if (pq->tunnel == t)
2737 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2738 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2740 // Should have been removed on destroy children
2743 queue_destroy (pq, GNUNET_YES);
2746 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2748 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2749 peer_info->core_transmit = NULL;
2755 * Destroy the tunnel and free any allocated resources linked to it.
2757 * @param t the tunnel to destroy
2759 * @return GNUNET_OK on success
2762 tunnel_destroy (struct MeshTunnel *t)
2764 struct MeshClient *c;
2765 struct GNUNET_HashCode hash;
2776 struct GNUNET_PeerIdentity id;
2778 GNUNET_PEER_resolve (t->id.oid, &id);
2779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2780 GNUNET_i2s (&id), t->id.tid);
2782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2786 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2787 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2795 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2797 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2804 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
2805 for (i = 0; i < t->nclients; i++)
2809 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2815 for (i = 0; i < t->nignore; i++)
2819 GNUNET_CONTAINER_multihashmap_remove (c->ignore_tunnels, &hash, t))
2826 (void) GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t);
2827 GNUNET_free_non_null (t->clients);
2828 GNUNET_free_non_null (t->ignore);
2829 GNUNET_free_non_null (t->clients_fc);
2831 peer_cancel_queues (t->next_hop, t);
2832 peer_cancel_queues (t->prev_hop, t);
2834 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
2835 GNUNET_SCHEDULER_cancel (t->timeout_task);
2836 if (GNUNET_SCHEDULER_NO_TASK != t->path_refresh_task)
2837 GNUNET_SCHEDULER_cancel (t->path_refresh_task);
2840 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2845 #define TUNNEL_DESTROY_EMPTY_TIME GNUNET_TIME_UNIT_MILLISECONDS
2848 * Tunnel is empty: destroy it.
2850 * @param cls Closure (Tunnel).
2851 * @param tc TaskContext.
2854 tunnel_destroy_empty_delayed (void *cls,
2855 const struct GNUNET_SCHEDULER_TaskContext *tc)
2857 struct MeshTunnel *t = cls;
2859 t->delayed_destroy = GNUNET_SCHEDULER_NO_TASK;
2860 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2863 if (0 != t->nclients)
2868 struct GNUNET_PeerIdentity id;
2870 GNUNET_PEER_resolve (t->id.oid, &id);
2871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2872 "executing destruction of empty tunnel %s [%X]\n",
2873 GNUNET_i2s (&id), t->id.tid);
2877 tunnel_send_destroy (t);
2878 if (0 == t->pending_messages)
2881 t->destroy = GNUNET_YES;
2886 * Schedule tunnel destruction if is empty and no new traffic comes in a time.
2888 * @param t Tunnel to destroy if empty.
2891 tunnel_destroy_empty (struct MeshTunnel *t)
2893 if (GNUNET_SCHEDULER_NO_TASK != t->delayed_destroy ||
2896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%u %u\n",
2897 t->delayed_destroy, t->nclients);
2903 struct GNUNET_PeerIdentity id;
2905 GNUNET_PEER_resolve (t->id.oid, &id);
2906 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2907 "scheduling destruction of empty tunnel %s [%X]\n",
2908 GNUNET_i2s (&id), t->id.tid);
2912 t->delayed_destroy =
2913 GNUNET_SCHEDULER_add_delayed (TUNNEL_DESTROY_EMPTY_TIME,
2914 &tunnel_destroy_empty_delayed,
2920 * Create a new tunnel
2922 * @param owner Who is the owner of the tunnel (short ID).
2923 * @param tid Tunnel Number of the tunnel.
2924 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2925 * @param local Tunnel Number for the tunnel, for the client point of view.
2927 * @return A new initialized tunnel. NULL on error.
2929 static struct MeshTunnel *
2930 tunnel_new (GNUNET_PEER_Id owner,
2931 MESH_TunnelNumber tid,
2932 struct MeshClient *client,
2933 MESH_TunnelNumber local)
2935 struct MeshTunnel *t;
2936 struct GNUNET_HashCode hash;
2938 if (n_tunnels >= max_tunnels && NULL == client)
2941 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2944 t->fwd_queue_max = (max_msgs_queue / max_tunnels) + 1;
2945 t->bck_queue_max = t->fwd_queue_max;
2947 t->fwd_pid = (uint32_t) -1; // Next (expected) = 0
2948 t->bck_pid = (uint32_t) -1; // Next (expected) = 0
2949 t->bck_ack = INITIAL_WINDOW_SIZE - 1;
2950 t->last_fwd_ack = INITIAL_WINDOW_SIZE - 1;
2951 t->local_tid = local;
2953 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2955 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2957 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2958 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2965 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2972 GNUNET_CRYPTO_hash (&t->local_tid, sizeof (MESH_TunnelNumber), &hash);
2974 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
2975 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2979 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2990 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2991 * client when the client disconnects. If the client is not the owner, the
2992 * owner will get notified if no more clients are in the tunnel and the client
2993 * get removed from the tunnel's list.
2995 * @param cls closure (client that is disconnecting)
2996 * @param key the hash of the local tunnel id (used to access the hashmap)
2997 * @param value the value stored at the key (tunnel to destroy)
2999 * @return GNUNET_OK, keep iterating.
3002 tunnel_destroy_iterator (void *cls,
3003 const struct GNUNET_HashCode * key,
3006 struct MeshTunnel *t = value;
3007 struct MeshClient *c = cls;
3009 send_client_tunnel_disconnect (t, c);
3012 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %u is destination.\n", c->id);
3013 tunnel_delete_client (t, c);
3014 client_delete_tunnel (c, t);
3015 tunnel_destroy_empty (t);
3018 tunnel_send_destroy (t);
3020 t->destroy = GNUNET_YES;
3027 * Timeout function, destroys tunnel if called
3029 * @param cls Closure (tunnel to destroy).
3030 * @param tc TaskContext
3033 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3035 struct MeshTunnel *t = cls;
3036 struct GNUNET_PeerIdentity id;
3038 t->timeout_task = GNUNET_SCHEDULER_NO_TASK;
3039 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3041 GNUNET_PEER_resolve(t->id.oid, &id);
3042 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3043 "Tunnel %s [%X] timed out. Destroying.\n",
3044 GNUNET_i2s(&id), t->id.tid);
3045 send_clients_tunnel_destroy (t);
3050 * Resets the tunnel timeout. Starts it if no timeout was running.
3052 * @param t Tunnel whose timeout to reset.
3054 * TODO use heap to improve efficiency of scheduler.
3057 tunnel_reset_timeout (struct MeshTunnel *t)
3059 if (GNUNET_SCHEDULER_NO_TASK != t->timeout_task)
3060 GNUNET_SCHEDULER_cancel (t->timeout_task);
3062 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3063 (refresh_path_time, 4), &tunnel_timeout, t);
3067 /******************************************************************************/
3068 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3069 /******************************************************************************/
3072 * Function to send a create path packet to a peer.
3074 * @param cls closure
3075 * @param size number of bytes available in buf
3076 * @param buf where the callee should write the message
3077 * @return number of bytes written to buf
3080 send_core_path_create (void *cls, size_t size, void *buf)
3082 struct MeshTunnel *t = cls;
3083 struct GNUNET_MESH_ManipulatePath *msg;
3084 struct GNUNET_PeerIdentity *peer_ptr;
3085 struct MeshPeerPath *p = t->path;
3090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
3092 sizeof (struct GNUNET_MESH_ManipulatePath) +
3093 p->length * sizeof (struct GNUNET_PeerIdentity);
3095 if (size < size_needed || NULL == buf)
3100 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
3101 msg->header.size = htons (size_needed);
3102 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
3103 msg->tid = ntohl (t->id.tid);
3106 if (GNUNET_YES == t->nobuffer)
3107 opt |= MESH_TUNNEL_OPT_NOBUFFER;
3108 msg->opt = htonl(opt);
3111 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
3112 for (i = 0; i < p->length; i++)
3114 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
3117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3118 "CREATE PATH (%u bytes long) sent!\n", size_needed);
3124 * Creates a path ack message in buf and frees all unused resources.
3126 * @param cls closure (MeshTransmissionDescriptor)
3127 * @param size number of bytes available in buf
3128 * @param buf where the callee should write the message
3129 * @return number of bytes written to buf
3132 send_core_path_ack (void *cls, size_t size, void *buf)
3134 struct MeshTransmissionDescriptor *info = cls;
3135 struct GNUNET_MESH_PathACK *msg = buf;
3137 GNUNET_assert (NULL != info);
3138 if (sizeof (struct GNUNET_MESH_PathACK) > size)
3143 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
3144 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3145 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
3146 msg->tid = htonl (info->origin->tid);
3147 msg->peer_id = my_full_id;
3150 /* TODO add signature */
3152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
3153 return sizeof (struct GNUNET_MESH_PathACK);
3158 * Free a transmission that was already queued with all resources
3159 * associated to the request.
3161 * @param queue Queue handler to cancel.
3162 * @param clear_cls Is it necessary to free associated cls?
3165 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3167 struct MeshTransmissionDescriptor *dd;
3168 // unsigned int max;
3170 if (GNUNET_YES == clear_cls)
3172 switch (queue->type)
3174 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3175 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3176 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3178 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3179 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3180 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3181 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3182 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
3183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3184 " prebuilt message\n");
3185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3187 GNUNET_MESH_DEBUG_M2S(queue->type));
3189 GNUNET_free (dd->data);
3191 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3196 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3197 " type %s unknown!\n",
3198 GNUNET_MESH_DEBUG_M2S(queue->type));
3200 GNUNET_free_non_null (queue->cls);
3202 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3203 queue->peer->queue_tail,
3206 /* Delete from child_fc in the appropiate tunnel */
3207 // max = queue->tunnel->fwd_queue_max;
3208 // GNUNET_PEER_resolve (queue->peer->id, &id);
3209 // if (NULL != cinfo)
3211 // for (i = 0; i < cinfo->send_buffer_n; i++)
3213 // i2 = (cinfo->send_buffer_start + i) % max;
3214 // if (cinfo->send_buffer[i2] == queue)
3216 // /* Found corresponding entry in the send_buffer. Move all others back. */
3220 // for (j = i, j2 = 0, j3 = 0; j < cinfo->send_buffer_n - 1; j++)
3222 // j2 = (cinfo->send_buffer_start + j) % max;
3223 // j3 = (cinfo->send_buffer_start + j + 1) % max;
3224 // cinfo->send_buffer[j2] = cinfo->send_buffer[j3];
3227 // cinfo->send_buffer[j3] = NULL;
3228 // cinfo->send_buffer_n--;
3233 GNUNET_free (queue);
3238 * @brief Get the next transmittable message from the queue.
3240 * This will be the head, except in the case of being a data packet
3241 * not allowed by the destination peer.
3243 * @param peer Destination peer.
3245 * @return The next viable MeshPeerQueue element to send to that peer.
3246 * NULL when there are no transmittable messages.
3248 struct MeshPeerQueue *
3249 queue_get_next (const struct MeshPeerInfo *peer)
3251 struct MeshPeerQueue *q;
3253 struct MeshTransmissionDescriptor *info;
3254 // struct GNUNET_MESH_Unicast *ucast;
3255 // struct GNUNET_MESH_ToOrigin *to_orig;
3256 struct GNUNET_PeerIdentity id;
3258 // uint32_t ack; FIXME
3260 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
3261 for (q = peer->queue_head; NULL != q; q = q->next)
3265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3267 GNUNET_MESH_DEBUG_M2S(q->type));
3270 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3271 // ucast = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
3272 // pid = ntohl (ucast->pid);
3273 GNUNET_PEER_resolve (info->peer->id, &id);
3274 // ack = cinfo->fwd_ack;
3276 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3277 // to_orig = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
3278 // pid = ntohl (to_orig->pid);
3279 // ack = t->bck_ack;
3282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3286 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3287 // "********* ACK: %u, PID: %u\n",
3289 // if (GNUNET_NO == GMC_is_pid_bigger(pid, ack))
3291 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3292 // "********* OK!\n");
3297 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3298 // "********* NEXT!\n");
3301 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3302 "********* nothing found\n");
3308 queue_send (void *cls, size_t size, void *buf)
3310 struct MeshPeerInfo *peer = cls;
3311 struct GNUNET_MessageHeader *msg;
3312 struct MeshPeerQueue *queue;
3313 struct MeshTunnel *t;
3314 struct GNUNET_PeerIdentity dst_id;
3317 peer->core_transmit = NULL;
3319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
3320 queue = queue_get_next (peer);
3322 /* Queue has no internal mesh traffic nor sendable payload */
3325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
3326 if (NULL == peer->queue_head)
3327 GNUNET_break (0); // Should've been canceled
3330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
3332 GNUNET_PEER_resolve (peer->id, &dst_id);
3333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3334 "********* towards %s\n",
3335 GNUNET_i2s(&dst_id));
3336 /* Check if buffer size is enough for the message */
3337 if (queue->size > size)
3339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3340 "********* not enough room, reissue\n");
3341 peer->core_transmit =
3342 GNUNET_CORE_notify_transmit_ready (core_handle,
3345 GNUNET_TIME_UNIT_FOREVER_REL,
3352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
3355 GNUNET_assert (0 < t->pending_messages);
3356 t->pending_messages--;
3357 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
3360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3361 "********* unicast: t->q (%u/%u)\n",
3362 t->fwd_queue_n, t->fwd_queue_max);
3364 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
3367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* to origin\n");
3371 switch (queue->type)
3374 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3375 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3376 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3377 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3378 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3379 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
3380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3381 "********* raw: %s\n",
3382 GNUNET_MESH_DEBUG_M2S (queue->type));
3384 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3385 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3386 data_size = send_core_data_raw (queue->cls, size, buf);
3387 msg = (struct GNUNET_MessageHeader *) buf;
3388 switch (ntohs (msg->type)) // Type of preconstructed message
3390 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3391 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3393 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3394 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
3400 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
3402 data_size = send_core_path_create (queue->cls, size, buf);
3404 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
3406 data_size = send_core_path_ack (queue->cls, size, buf);
3410 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3411 "********* type unknown: %u\n",
3415 switch (queue->type)
3417 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3418 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3419 // if (cinfo->send_buffer[cinfo->send_buffer_start] != queue)
3421 // GNUNET_break (0);
3422 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3423 // "at pos %u (%p) != %p\n",
3424 // cinfo->send_buffer_start,
3425 // cinfo->send_buffer[cinfo->send_buffer_start],
3428 // if (cinfo->send_buffer_n > 0)
3430 // cinfo->send_buffer[cinfo->send_buffer_start] = NULL;
3431 // cinfo->send_buffer_n--;
3432 // cinfo->send_buffer_start++;
3433 // cinfo->send_buffer_start %= t->fwd_queue_max;
3437 // GNUNET_break (0);
3444 /* Free queue, but cls was freed by send_core_* */
3445 queue_destroy (queue, GNUNET_NO);
3447 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
3453 /* If more data in queue, send next */
3454 queue = queue_get_next(peer);
3457 struct GNUNET_PeerIdentity id;
3459 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
3460 GNUNET_PEER_resolve (peer->id, &id);
3461 peer->core_transmit =
3462 GNUNET_CORE_notify_transmit_ready(core_handle,
3465 GNUNET_TIME_UNIT_FOREVER_REL,
3473 if (NULL != peer->queue_head)
3475 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3476 "********* %s stalled\n",
3477 GNUNET_i2s(&my_full_id));
3478 // if (NULL == cinfo) FIXME
3479 // cinfo = tunnel_get_neighbor_fc (t, &dst_id);
3480 // // FIXME unify bck/fwd structures, bck does not have cinfo right now
3481 // if (NULL != cinfo && GNUNET_SCHEDULER_NO_TASK == cinfo->fc_poll)
3483 // cinfo->fc_poll = GNUNET_SCHEDULER_add_delayed (cinfo->fc_poll_time,
3484 // &tunnel_poll, cinfo);
3488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
3494 * @brief Queue and pass message to core when possible.
3496 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3497 * accounts for it. In case the queue is full, the message is dropped and
3500 * Otherwise, message is treated as internal and allowed to go regardless of
3503 * @param cls Closure (@c type dependant). It will be used by queue_send to
3504 * build the message to be sent if not already prebuilt.
3505 * @param type Type of the message, 0 for a raw message.
3506 * @param size Size of the message.
3507 * @param dst Neighbor to send message to.
3508 * @param t Tunnel this message belongs to.
3511 queue_add (void *cls, uint16_t type, size_t size,
3512 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3514 struct MeshPeerQueue *queue;
3515 struct GNUNET_PeerIdentity id;
3520 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3522 n = &t->fwd_queue_n;
3523 max = &t->fwd_queue_max;
3525 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3527 n = &t->bck_queue_n;
3528 max = &t->bck_queue_max;
3535 GNUNET_STATISTICS_update(stats,
3536 "# messages dropped (buffer full)",
3538 return; // Drop message
3542 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3548 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3549 if (NULL == dst->core_transmit)
3551 GNUNET_PEER_resolve (dst->id, &id);
3552 dst->core_transmit =
3553 GNUNET_CORE_notify_transmit_ready (core_handle,
3556 GNUNET_TIME_UNIT_FOREVER_REL,
3562 t->pending_messages++;
3566 /******************************************************************************/
3567 /******************** MESH NETWORK HANDLERS **************************/
3568 /******************************************************************************/
3572 * Core handler for path creation
3574 * @param cls closure
3575 * @param message message
3576 * @param peer peer identity this notification is about
3578 * @return GNUNET_OK to keep the connection open,
3579 * GNUNET_SYSERR to close it (signal serious error)
3582 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3583 const struct GNUNET_MessageHeader *message)
3585 unsigned int own_pos;
3588 MESH_TunnelNumber tid;
3589 struct GNUNET_MESH_ManipulatePath *msg;
3590 struct GNUNET_PeerIdentity *pi;
3591 struct GNUNET_HashCode hash;
3592 struct MeshPeerPath *path;
3593 struct MeshPeerInfo *dest_peer_info;
3594 struct MeshPeerInfo *orig_peer_info;
3595 struct MeshTunnel *t;
3597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3598 "Received a path create msg [%s]\n",
3599 GNUNET_i2s (&my_full_id));
3600 size = ntohs (message->size);
3601 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
3603 GNUNET_break_op (0);
3607 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
3608 if (size % sizeof (struct GNUNET_PeerIdentity))
3610 GNUNET_break_op (0);
3613 size /= sizeof (struct GNUNET_PeerIdentity);
3616 GNUNET_break_op (0);
3619 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3620 msg = (struct GNUNET_MESH_ManipulatePath *) message;
3622 tid = ntohl (msg->tid);
3623 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3625 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
3626 t = tunnel_get (pi, tid);
3627 if (NULL == t) // FIXME only for INCOMING tunnels?
3631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3632 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3635 // FIXME notify failure
3638 opt = ntohl (msg->opt);
3639 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
3641 t->nobuffer = GNUNET_YES;
3642 t->last_fwd_ack = t->fwd_pid + 1;
3644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3646 if (GNUNET_YES == t->nobuffer)
3648 t->bck_queue_max = 1;
3649 t->fwd_queue_max = 1;
3652 // FIXME only assign a local tid if a local client is interested (on demand)
3653 while (NULL != tunnel_get_incoming (next_local_tid))
3654 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3655 t->local_tid_dest = next_local_tid++;
3656 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3659 tunnel_reset_timeout (t);
3660 GNUNET_CRYPTO_hash (&t->local_tid_dest, sizeof (MESH_TunnelNumber), &hash);
3662 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
3663 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
3671 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3672 if (NULL == dest_peer_info)
3674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3675 " Creating PeerInfo for destination.\n");
3676 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3677 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3678 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3680 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3682 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3683 if (NULL == orig_peer_info)
3685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3686 " Creating PeerInfo for origin.\n");
3687 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3688 orig_peer_info->id = GNUNET_PEER_intern (pi);
3689 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3690 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3693 path = path_new (size);
3695 for (i = 0; i < size; i++)
3697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3698 GNUNET_i2s (&pi[i]));
3699 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3700 if (path->peers[i] == myid)
3703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3706 /* cannot be self, must be 'not found' */
3707 /* create path: self not found in path through self */
3708 GNUNET_break_op (0);
3709 path_destroy (path);
3713 path_add_to_peers (path, GNUNET_NO);
3714 t->prev_hop = path->peers[own_pos - 1];
3715 GNUNET_PEER_change_rc (t->prev_hop, 1);
3716 if (own_pos == size - 1)
3718 /* It is for us! Send ack. */
3719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3720 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3721 t->peer = path->peers[0];
3726 struct MeshPeerPath *path2;
3728 t->next_hop = path->peers[own_pos + 1];
3729 GNUNET_PEER_change_rc(t->next_hop, 1);
3731 /* It's for somebody else! Retransmit. */
3732 path2 = path_duplicate (path);
3733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3734 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3735 path2 = path_duplicate (path);
3736 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
3737 send_create_path (dest_peer_info, path, t);
3744 * Core handler for path destruction
3746 * @param cls closure
3747 * @param message message
3748 * @param peer peer identity this notification is about
3750 * @return GNUNET_OK to keep the connection open,
3751 * GNUNET_SYSERR to close it (signal serious error)
3754 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3755 const struct GNUNET_MessageHeader *message)
3757 struct GNUNET_MESH_ManipulatePath *msg;
3758 struct GNUNET_PeerIdentity *pi;
3759 struct MeshPeerPath *path;
3760 struct MeshTunnel *t;
3761 unsigned int own_pos;
3765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3766 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
3767 size = ntohs (message->size);
3768 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
3770 GNUNET_break_op (0);
3774 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
3775 if (size % sizeof (struct GNUNET_PeerIdentity))
3777 GNUNET_break_op (0);
3780 size /= sizeof (struct GNUNET_PeerIdentity);
3783 GNUNET_break_op (0);
3786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3788 msg = (struct GNUNET_MESH_ManipulatePath *) message;
3789 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3790 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3791 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
3793 t = tunnel_get (pi, ntohl (msg->tid));
3796 /* TODO notify back: we don't know this tunnel */
3797 GNUNET_break_op (0);
3800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3801 path = path_new (size);
3803 for (i = 0; i < size; i++)
3805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3806 GNUNET_i2s (&pi[i]));
3807 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3808 if (path->peers[i] == myid)
3811 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3812 if (own_pos < path->length - 1)
3813 send_prebuilt_message (message, path->peers[own_pos + 1], t);
3815 send_client_tunnel_disconnect(t, NULL);
3817 // tunnel_delete_peer (t, path->peers[path->length - 1]); FIXME
3818 path_destroy (path);
3824 * Core handler for notifications of broken paths
3826 * @param cls closure
3827 * @param message message
3828 * @param peer peer identity this notification is about
3830 * @return GNUNET_OK to keep the connection open,
3831 * GNUNET_SYSERR to close it (signal serious error)
3834 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3835 const struct GNUNET_MessageHeader *message)
3837 struct GNUNET_MESH_PathBroken *msg;
3838 struct MeshTunnel *t;
3840 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3841 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3842 msg = (struct GNUNET_MESH_PathBroken *) message;
3843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3844 GNUNET_i2s (&msg->peer1));
3845 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3846 GNUNET_i2s (&msg->peer2));
3847 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3850 GNUNET_break_op (0);
3853 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3854 GNUNET_PEER_search (&msg->peer2));
3861 * Core handler for tunnel destruction
3863 * @param cls closure
3864 * @param message message
3865 * @param peer peer identity this notification is about
3867 * @return GNUNET_OK to keep the connection open,
3868 * GNUNET_SYSERR to close it (signal serious error)
3871 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3872 const struct GNUNET_MessageHeader *message)
3874 struct GNUNET_MESH_TunnelDestroy *msg;
3875 struct MeshTunnel *t;
3878 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3880 "Got a TUNNEL DESTROY packet from %s\n",
3882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3883 " for tunnel %s [%u]\n",
3884 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3885 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3886 /* Check signature */
3889 /* Probably already got the message from another path,
3890 * destroyed the tunnel and retransmitted to children.
3893 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3897 pid = GNUNET_PEER_search (peer);
3898 if (pid != t->prev_hop && 0 < t->nclients)
3900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3901 "still in use by %u clients\n",
3905 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3907 /* Tunnel was incoming, notify clients */
3908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3909 t->local_tid, t->local_tid_dest);
3910 send_clients_tunnel_destroy (t);
3912 tunnel_send_destroy (t);
3913 t->destroy = GNUNET_YES;
3914 // TODO: add timeout to destroy the tunnel anyway
3920 * Core handler for mesh network traffic going from the origin to a peer
3922 * @param cls closure
3923 * @param peer peer identity this notification is about
3924 * @param message message
3925 * @return GNUNET_OK to keep the connection open,
3926 * GNUNET_SYSERR to close it (signal serious error)
3929 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3930 const struct GNUNET_MessageHeader *message)
3932 struct GNUNET_MESH_Unicast *msg;
3933 struct MeshTunnel *t;
3934 GNUNET_PEER_Id dest_id;
3939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3942 size = ntohs (message->size);
3944 sizeof (struct GNUNET_MESH_Unicast) +
3945 sizeof (struct GNUNET_MessageHeader))
3950 msg = (struct GNUNET_MESH_Unicast *) message;
3951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3952 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3954 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3957 /* TODO notify back: we don't know this tunnel */
3958 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3959 GNUNET_break_op (0);
3962 pid = ntohl (msg->pid);
3963 if (t->fwd_pid == pid)
3965 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
3966 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3967 " Already seen pid %u, DROPPING!\n", pid);
3972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3973 " pid %u not seen yet, forwarding\n", pid);
3978 if (GMC_is_pid_bigger (pid, t->last_fwd_ack))
3980 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3981 GNUNET_break_op (0);
3982 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3983 "Received PID %u, ACK %u\n",
3984 pid, t->last_fwd_ack);
3988 tunnel_reset_timeout (t);
3990 if (dest_id == myid)
3992 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3993 " it's for us! sending to clients...\n");
3994 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
3995 send_subscribed_clients (message, &msg[1].header, t);
3996 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3999 ttl = ntohl (msg->ttl);
4000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4003 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4004 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4005 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4008 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4009 " not for us, retransmitting...\n");
4011 /* cinfo->fwd_pid = pid; FIXME
4013 if (GNUNET_YES == t->nobuffer &&
4014 GNUNET_YES == GMC_is_pid_bigger (pid, cinfo->fwd_ack))
4016 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
4017 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " %u > %u\n", pid, cinfo->fwd_ack);
4018 GNUNET_break_op (0);
4021 send_prebuilt_message (message, t->next_hop, t);
4022 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4028 * Core handler for mesh network traffic toward the owner of a tunnel
4030 * @param cls closure
4031 * @param message message
4032 * @param peer peer identity this notification is about
4034 * @return GNUNET_OK to keep the connection open,
4035 * GNUNET_SYSERR to close it (signal serious error)
4038 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4039 const struct GNUNET_MessageHeader *message)
4041 struct GNUNET_MESH_ToOrigin *msg;
4042 struct MeshPeerInfo *peer_info;
4043 struct MeshTunnel *t;
4047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
4049 size = ntohs (message->size);
4050 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
4051 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
4053 GNUNET_break_op (0);
4056 msg = (struct GNUNET_MESH_ToOrigin *) message;
4057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
4058 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
4059 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4060 pid = ntohl (msg->pid);
4064 /* TODO notify that we dont know this tunnel (whom)? */
4065 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4066 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4067 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
4068 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4073 // if (cinfo->bck_pid == pid) FIXME
4075 // /* already seen this packet, drop */
4076 // GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
4077 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4078 // " Already seen pid %u, DROPPING!\n", pid);
4079 // tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4080 // return GNUNET_OK;
4083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4084 " pid %u not seen yet, forwarding\n", pid);
4085 // cinfo->bck_pid = pid; FIXME
4087 if (NULL != t->owner)
4090 struct GNUNET_MESH_ToOrigin *copy;
4092 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4093 " it's for us! sending to clients...\n");
4094 /* TODO signature verification */
4095 memcpy (cbuf, message, size);
4096 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
4097 copy->tid = htonl (t->local_tid);
4099 copy->pid = htonl (t->bck_pid);
4100 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
4101 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
4102 ©->header, GNUNET_NO);
4103 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4107 " not for us, retransmitting...\n");
4109 peer_info = peer_get (&msg->oid);
4110 if (NULL == peer_info)
4112 /* unknown origin of tunnel */
4116 if (0 == t->prev_hop)
4118 if (GNUNET_YES == t->destroy)
4120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4121 "to orig received on a dying tunnel %s [%X]\n",
4122 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4125 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4126 "unknown to origin at %s\n",
4127 GNUNET_i2s (&my_full_id));
4128 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4131 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4132 "for tunnel %s [%X]\n",
4133 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4136 send_prebuilt_message (message, t->prev_hop, t);
4137 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
4144 * Core handler for mesh network traffic point-to-point acks.
4146 * @param cls closure
4147 * @param message message
4148 * @param peer peer identity this notification is about
4150 * @return GNUNET_OK to keep the connection open,
4151 * GNUNET_SYSERR to close it (signal serious error)
4154 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4155 const struct GNUNET_MessageHeader *message)
4157 struct GNUNET_MESH_ACK *msg;
4158 struct MeshTunnel *t;
4161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4163 msg = (struct GNUNET_MESH_ACK *) message;
4165 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4169 /* TODO notify that we dont know this tunnel (whom)? */
4170 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4173 ack = ntohl (msg->pid);
4174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4176 /* Is this a forward or backward ACK? */
4177 if (t->prev_hop != GNUNET_PEER_search(peer))
4181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4182 // cinfo->fwd_ack = ack; FIXME
4183 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4184 peer_unlock_queue (t->next_hop);
4185 // if (GNUNET_SCHEDULER_NO_TASK != cinfo->fc_poll) FIXME
4187 // GNUNET_SCHEDULER_cancel (cinfo->fc_poll);
4188 // cinfo->fc_poll = GNUNET_SCHEDULER_NO_TASK;
4189 // cinfo->fc_poll_time = GNUNET_TIME_UNIT_SECONDS;
4194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4196 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4197 peer_unlock_queue (t->prev_hop);
4204 * Core handler for mesh network traffic point-to-point ack polls.
4206 * @param cls closure
4207 * @param message message
4208 * @param peer peer identity this notification is about
4210 * @return GNUNET_OK to keep the connection open,
4211 * GNUNET_SYSERR to close it (signal serious error)
4214 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4215 const struct GNUNET_MessageHeader *message)
4217 struct GNUNET_MESH_Poll *msg;
4218 struct MeshTunnel *t;
4220 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
4223 msg = (struct GNUNET_MESH_Poll *) message;
4225 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4229 /* TODO notify that we dont know this tunnel (whom)? */
4230 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4231 GNUNET_break_op (0);
4235 /* Is this a forward or backward ACK? */
4236 if (t->prev_hop != GNUNET_PEER_search(peer))
4238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4239 /* FIXME cinfo->bck_ack = cinfo->fwd_pid; // mark as ready to send */
4240 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
4244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4245 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
4252 * Core handler for path ACKs
4254 * @param cls closure
4255 * @param message message
4256 * @param peer peer identity this notification is about
4258 * @return GNUNET_OK to keep the connection open,
4259 * GNUNET_SYSERR to close it (signal serious error)
4262 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4263 const struct GNUNET_MessageHeader *message)
4265 struct GNUNET_MESH_PathACK *msg;
4266 struct MeshPeerInfo *peer_info;
4267 struct MeshPeerPath *p;
4268 struct MeshTunnel *t;
4270 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4271 GNUNET_i2s (&my_full_id));
4272 msg = (struct GNUNET_MESH_PathACK *) message;
4273 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4276 /* TODO notify that we don't know the tunnel */
4277 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4279 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4282 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4283 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4285 peer_info = peer_get (&msg->peer_id);
4286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4287 GNUNET_i2s (&msg->peer_id));
4288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4291 /* Add path to peers? */
4295 path_add_to_peers (p, GNUNET_YES);
4302 /* Message for us? */
4303 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4306 if (NULL == t->owner)
4308 GNUNET_break_op (0);
4311 if (NULL != peer_info->dhtget)
4313 GNUNET_DHT_get_stop (peer_info->dhtget);
4314 peer_info->dhtget = NULL;
4319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4320 " not for us, retransmitting...\n");
4321 peer_info = peer_get (&msg->oid);
4322 send_prebuilt_message (message, t->prev_hop, t);
4328 * Core handler for mesh keepalives.
4330 * @param cls closure
4331 * @param message message
4332 * @param peer peer identity this notification is about
4333 * @return GNUNET_OK to keep the connection open,
4334 * GNUNET_SYSERR to close it (signal serious error)
4336 * TODO: Check who we got this from, to validate route.
4339 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4340 const struct GNUNET_MessageHeader *message)
4342 struct GNUNET_MESH_TunnelKeepAlive *msg;
4343 struct MeshTunnel *t;
4345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4348 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4349 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4353 /* TODO notify that we dont know that tunnel */
4354 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4359 tunnel_reset_timeout (t);
4361 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4362 send_prebuilt_message (message, t->next_hop, t);
4369 * Functions to handle messages from core
4371 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4372 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4373 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
4374 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4375 sizeof (struct GNUNET_MESH_PathBroken)},
4376 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4377 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4378 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4379 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
4380 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4381 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4382 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4383 sizeof (struct GNUNET_MESH_ACK)},
4384 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4385 sizeof (struct GNUNET_MESH_Poll)},
4386 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4387 sizeof (struct GNUNET_MESH_PathACK)},
4393 /******************************************************************************/
4394 /**************** MESH LOCAL HANDLER HELPERS ***********************/
4395 /******************************************************************************/
4400 * notify_client_connection_failure: notify a client that the connection to the
4401 * requested remote peer is not possible (for instance, no route found)
4402 * Function called when the socket is ready to queue more data. "buf" will be
4403 * NULL and "size" zero if the socket was closed for writing in the meantime.
4405 * @param cls closure
4406 * @param size number of bytes available in buf
4407 * @param buf where the callee should write the message
4408 * @return number of bytes written to buf
4411 notify_client_connection_failure (void *cls, size_t size, void *buf)
4414 struct MeshPeerInfo *peer_info;
4415 struct GNUNET_MESH_PeerControl *msg;
4416 struct GNUNET_PeerIdentity id;
4418 if (0 == size && NULL == buf)
4420 // TODO retry? cancel?
4424 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
4425 peer_info = (struct MeshPeerInfo *) cls;
4426 msg = (struct GNUNET_MESH_PeerControl *) buf;
4427 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
4428 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
4429 // msg->tunnel_id = htonl(peer_info->t->tid);
4430 GNUNET_PEER_resolve (peer_info->id, &id);
4431 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
4439 * Send keepalive packets for a tunnel.
4441 * @param cls Closure (tunnel for which to send the keepalive).
4442 * @param tc Notification context.
4445 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4447 struct MeshTunnel *t = cls;
4448 struct GNUNET_MESH_TunnelKeepAlive *msg;
4449 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
4452 t->path_refresh_task = GNUNET_SCHEDULER_NO_TASK;
4453 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4459 "sending keepalive for tunnel %d\n", t->id.tid);
4461 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
4462 msg->header.size = htons (size);
4463 // FIXME change to tunnel keepalive
4464 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
4465 msg->oid = my_full_id;
4466 msg->tid = htonl (t->id.tid);
4467 send_prebuilt_message (&msg->header, t->next_hop, t);
4469 t->path_refresh_task =
4470 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
4471 tunnel_reset_timeout (t);
4476 * Function to process paths received for a new peer addition. The recorded
4477 * paths form the initial tunnel, which can be optimized later.
4478 * Called on each result obtained for the DHT search.
4480 * @param cls closure
4481 * @param exp when will this value expire
4482 * @param key key of the result
4483 * @param get_path path of the get request
4484 * @param get_path_length lenght of get_path
4485 * @param put_path path of the put request
4486 * @param put_path_length length of the put_path
4487 * @param type type of the result
4488 * @param size number of bytes in data
4489 * @param data pointer to the result data
4491 * TODO: re-issue the request after certain time? cancel after X results?
4494 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4495 const struct GNUNET_HashCode * key,
4496 const struct GNUNET_PeerIdentity *get_path,
4497 unsigned int get_path_length,
4498 const struct GNUNET_PeerIdentity *put_path,
4499 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4500 size_t size, const void *data)
4502 struct MeshPeerInfo *peer = cls;
4503 struct MeshPeerPath *p;
4504 struct GNUNET_PeerIdentity pi;
4507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4508 GNUNET_PEER_resolve (peer->id, &pi);
4509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4511 p = path_build_from_dht (get_path, get_path_length,
4512 put_path, put_path_length);
4513 path_add_to_peers (p, GNUNET_NO);
4515 for (i = 0; i < peer->ntunnels; i++)
4517 peer_connect (peer, peer->tunnels[i]); // FIXME add if
4524 /******************************************************************************/
4525 /********************* MESH LOCAL HANDLES **************************/
4526 /******************************************************************************/
4530 * Handler for client disconnection
4532 * @param cls closure
4533 * @param client identification of the client; NULL
4534 * for the last call when the server is destroyed
4537 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4539 struct MeshClient *c;
4540 struct MeshClient *next;
4542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
4545 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4552 if (c->handle != client)
4554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
4558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
4560 GNUNET_SERVER_client_drop (c->handle);
4561 c->shutting_down = GNUNET_YES;
4562 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
4563 &tunnel_destroy_iterator, c);
4564 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
4565 &tunnel_destroy_iterator, c);
4566 GNUNET_CONTAINER_multihashmap_iterate (c->ignore_tunnels,
4567 &tunnel_destroy_iterator, c);
4568 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
4569 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
4570 GNUNET_CONTAINER_multihashmap_destroy (c->ignore_tunnels);
4572 if (NULL != c->types)
4573 GNUNET_CONTAINER_multihashmap_destroy (c->types);
4575 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
4578 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4587 * Handler for new clients
4589 * @param cls closure
4590 * @param client identification of the client
4591 * @param message the actual message, which includes messages the client wants
4594 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4595 const struct GNUNET_MessageHeader *message)
4597 struct GNUNET_MESH_ClientConnect *cc_msg;
4598 struct MeshClient *c;
4604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
4606 /* Check data sanity */
4607 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4608 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4609 ntypes = ntohs (cc_msg->types);
4610 if (size != ntypes * sizeof (uint16_t))
4613 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4617 /* Create new client structure */
4618 c = GNUNET_malloc (sizeof (struct MeshClient));
4619 c->id = next_client_id++; // overflow not important: just for debug
4620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
4621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u types\n", ntypes);
4623 GNUNET_SERVER_client_keep (client);
4627 struct GNUNET_HashCode hc;
4629 t = (uint16_t *) &cc_msg[1];
4630 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes, GNUNET_NO);
4631 for (i = 0; i < ntypes; i++)
4634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
4635 GNUNET_CRYPTO_hash (&u16, sizeof (u16), &hc); // FIXME pseudo hash
4637 /* store in clients hashmap */
4638 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
4639 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4640 /* store in global hashmap */
4641 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
4642 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4646 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4647 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4648 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4649 c->ignore_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4650 GNUNET_SERVER_notification_context_add (nc, client);
4651 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
4653 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
4659 * Handler for requests of new tunnels
4661 * @param cls Closure.
4662 * @param client Identification of the client.
4663 * @param message The actual message.
4666 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
4667 const struct GNUNET_MessageHeader *message)
4669 struct GNUNET_MESH_TunnelMessage *t_msg;
4670 struct MeshPeerInfo *peer_info;
4671 struct MeshTunnel *t;
4672 struct MeshClient *c;
4673 MESH_TunnelNumber tid;
4675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
4677 /* Sanity check for client registration */
4678 if (NULL == (c = client_get (client)))
4681 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4686 /* Message sanity check */
4687 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4690 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4694 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4696 GNUNET_i2s (&t_msg->peer));
4697 /* Sanity check for tunnel numbering */
4698 tid = ntohl (t_msg->tunnel_id);
4699 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4702 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4705 /* Sanity check for duplicate tunnel IDs */
4706 if (NULL != tunnel_get_by_local_id (c, tid))
4709 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4713 while (NULL != tunnel_get_by_pi (myid, next_tid))
4714 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4715 t = tunnel_new (myid, next_tid, c, tid);
4716 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4720 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
4724 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
4726 peer_info = peer_get (&t_msg->peer);
4727 GNUNET_array_append (peer_info->tunnels, peer_info->ntunnels, t);
4728 peer_connect (peer_info, t);
4729 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4735 * Handler for requests of deleting tunnels
4737 * @param cls closure
4738 * @param client identification of the client
4739 * @param message the actual message
4742 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4743 const struct GNUNET_MessageHeader *message)
4745 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4746 struct MeshClient *c;
4747 struct MeshTunnel *t;
4748 MESH_TunnelNumber tid;
4750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4751 "Got a DESTROY TUNNEL from client!\n");
4753 /* Sanity check for client registration */
4754 if (NULL == (c = client_get (client)))
4757 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4762 /* Message sanity check */
4763 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4766 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4770 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4772 /* Retrieve tunnel */
4773 tid = ntohl (tunnel_msg->tunnel_id);
4774 t = tunnel_get_by_local_id(c, tid);
4777 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4779 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4782 if (c != t->owner || tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4784 client_ignore_tunnel (c, t);
4785 tunnel_destroy_empty (t);
4786 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4789 send_client_tunnel_disconnect (t, c);
4790 client_delete_tunnel (c, t);
4792 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4794 tunnel_send_destroy (t);
4795 peer_remove_tunnel (peer_get_short(t->peer), t);
4796 t->destroy = GNUNET_YES;
4797 /* The tunnel will be destroyed when the last message is transmitted. */
4798 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4804 * Handler for requests of seeting tunnel's buffering policy.
4806 * @param cls Closure (unused).
4807 * @param client Identification of the client.
4808 * @param message The actual message.
4811 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
4812 const struct GNUNET_MessageHeader *message)
4814 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4815 struct MeshClient *c;
4816 struct MeshTunnel *t;
4817 MESH_TunnelNumber tid;
4819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4820 "Got a BUFFER request from client!\n");
4822 /* Sanity check for client registration */
4823 if (NULL == (c = client_get (client)))
4826 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4829 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4831 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4833 /* Retrieve tunnel */
4834 tid = ntohl (tunnel_msg->tunnel_id);
4835 t = tunnel_get_by_local_id(c, tid);
4838 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4840 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4844 switch (ntohs(message->type))
4846 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
4847 t->nobuffer = GNUNET_NO;
4849 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
4850 t->nobuffer = GNUNET_YES;
4856 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4861 * Handler for client traffic directed to one peer
4863 * @param cls closure
4864 * @param client identification of the client
4865 * @param message the actual message
4868 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4869 const struct GNUNET_MessageHeader *message)
4871 struct MeshClient *c;
4872 struct MeshTunnel *t;
4873 struct GNUNET_MESH_Unicast *data_msg;
4874 MESH_TunnelNumber tid;
4877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4878 "Got a unicast request from a client!\n");
4880 /* Sanity check for client registration */
4881 if (NULL == (c = client_get (client)))
4884 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4889 data_msg = (struct GNUNET_MESH_Unicast *) message;
4891 /* Sanity check for message size */
4892 size = ntohs (message->size);
4893 if (sizeof (struct GNUNET_MESH_Unicast) +
4894 sizeof (struct GNUNET_MessageHeader) > size)
4897 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4901 /* Tunnel exists? */
4902 tid = ntohl (data_msg->tid);
4903 t = tunnel_get_by_local_id (c, tid);
4907 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4911 /* Is it a local tunnel? Then, does client own the tunnel? */
4912 if (t->owner->handle != client)
4915 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4919 /* PID should be as expected */
4920 if (ntohl (data_msg->pid) != t->fwd_pid + 1)
4923 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4924 "Unicast PID, expected %u, got %u\n",
4925 t->fwd_pid + 1, ntohl (data_msg->pid));
4926 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4930 /* Ok, everything is correct, send the message
4931 * (pretend we got it from a mesh peer)
4934 /* Work around const limitation */
4935 char buf[ntohs (message->size)] GNUNET_ALIGN;
4936 struct GNUNET_MESH_Unicast *copy;
4938 copy = (struct GNUNET_MESH_Unicast *) buf;
4939 memcpy (buf, data_msg, size);
4940 copy->oid = my_full_id;
4941 copy->tid = htonl (t->id.tid);
4942 copy->ttl = htonl (default_ttl);
4943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4944 " calling generic handler...\n");
4945 handle_mesh_data_unicast (NULL, &my_full_id, ©->header);
4947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4948 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4955 * Handler for client traffic directed to the origin
4957 * @param cls closure
4958 * @param client identification of the client
4959 * @param message the actual message
4962 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4963 const struct GNUNET_MessageHeader *message)
4965 struct GNUNET_MESH_ToOrigin *data_msg;
4966 struct MeshTunnelClientInfo *clinfo;
4967 struct MeshClient *c;
4968 struct MeshTunnel *t;
4969 MESH_TunnelNumber tid;
4972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4973 "Got a ToOrigin request from a client!\n");
4974 /* Sanity check for client registration */
4975 if (NULL == (c = client_get (client)))
4978 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4983 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4985 /* Sanity check for message size */
4986 size = ntohs (message->size);
4987 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4988 sizeof (struct GNUNET_MessageHeader) > size)
4991 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4995 /* Tunnel exists? */
4996 tid = ntohl (data_msg->tid);
4997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4998 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5001 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5004 t = tunnel_get_by_local_id (c, tid);
5007 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5008 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5010 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5014 /* It should be sent by someone who has this as incoming tunnel. */
5015 if (GNUNET_NO == client_knows_tunnel (c, t))
5018 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5022 /* PID should be as expected */
5023 clinfo = tunnel_get_client_fc (t, c);
5024 if (ntohl (data_msg->pid) != clinfo->bck_pid + 1)
5027 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5028 "To Origin PID, expected %u, got %u\n",
5029 clinfo->bck_pid + 1,
5030 ntohl (data_msg->pid));
5031 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5036 /* Ok, everything is correct, send the message
5037 * (pretend we got it from a mesh peer)
5040 char buf[ntohs (message->size)] GNUNET_ALIGN;
5041 struct GNUNET_MESH_ToOrigin *copy;
5043 /* Work around const limitation */
5044 copy = (struct GNUNET_MESH_ToOrigin *) buf;
5045 memcpy (buf, data_msg, size);
5046 GNUNET_PEER_resolve (t->id.oid, ©->oid);
5047 copy->tid = htonl (t->id.tid);
5048 copy->ttl = htonl (default_ttl);
5049 copy->pid = htonl (t->bck_pid + 1);
5051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5052 " calling generic handler...\n");
5053 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header);
5055 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5062 * Handler for client's ACKs for payload traffic.
5064 * @param cls Closure (unused).
5065 * @param client Identification of the client.
5066 * @param message The actual message.
5069 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5070 const struct GNUNET_MessageHeader *message)
5072 struct GNUNET_MESH_LocalAck *msg;
5073 struct MeshTunnel *t;
5074 struct MeshClient *c;
5075 MESH_TunnelNumber tid;
5078 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5079 /* Sanity check for client registration */
5080 if (NULL == (c = client_get (client)))
5083 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5088 msg = (struct GNUNET_MESH_LocalAck *) message;
5090 /* Tunnel exists? */
5091 tid = ntohl (msg->tunnel_id);
5092 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5093 t = tunnel_get_by_local_id (c, tid);
5097 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5098 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5099 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5103 ack = ntohl (msg->max_pid);
5104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
5106 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5107 if (NULL != t->owner && t->owner->handle == client)
5109 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5111 tunnel_send_bck_ack(t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
5115 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5116 tunnel_set_client_fwd_ack (t, c, ack);
5117 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
5120 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5128 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5130 * @param cls Closure (client handle).
5131 * @param key Key (hashed tunnel ID, unused).
5132 * @param value Tunnel info.
5134 * @return GNUNET_YES, to keep iterating.
5137 monitor_all_tunnels_iterator (void *cls,
5138 const struct GNUNET_HashCode * key,
5141 struct GNUNET_SERVER_Client *client = cls;
5142 struct MeshTunnel *t = value;
5143 struct GNUNET_MESH_LocalMonitor *msg;
5145 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5146 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5147 msg->tunnel_id = htonl (t->id.tid);
5148 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5149 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5150 GNUNET_PEER_resolve (t->peer, &msg->destination);
5152 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5153 "* sending info about tunnel %s [%u]\n",
5154 GNUNET_i2s (&msg->owner), t->id.tid);
5156 GNUNET_SERVER_notification_context_unicast (nc, client,
5157 &msg->header, GNUNET_NO);
5163 * Handler for client's MONITOR request.
5165 * @param cls Closure (unused).
5166 * @param client Identification of the client.
5167 * @param message The actual message.
5170 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5171 const struct GNUNET_MessageHeader *message)
5173 struct MeshClient *c;
5175 /* Sanity check for client registration */
5176 if (NULL == (c = client_get (client)))
5179 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5183 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5184 "Received get tunnels request from client %u\n",
5186 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5187 monitor_all_tunnels_iterator,
5189 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5190 "Get tunnels request from client %u completed\n",
5192 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5197 * Handler for client's MONITOR_TUNNEL request.
5199 * @param cls Closure (unused).
5200 * @param client Identification of the client.
5201 * @param message The actual message.
5204 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5205 const struct GNUNET_MessageHeader *message)
5207 const struct GNUNET_MESH_LocalMonitor *msg;
5208 struct GNUNET_MESH_LocalMonitor *resp;
5209 struct MeshClient *c;
5210 struct MeshTunnel *t;
5212 /* Sanity check for client registration */
5213 if (NULL == (c = client_get (client)))
5216 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5220 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5221 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5222 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5225 ntohl (msg->tunnel_id));
5226 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5229 /* We don't know the tunnel FIXME */
5230 struct GNUNET_MESH_LocalMonitor warn;
5233 GNUNET_SERVER_notification_context_unicast (nc, client,
5236 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5240 /* Initialize context */
5241 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5243 GNUNET_PEER_resolve (t->peer, &resp->destination);
5244 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5245 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5246 &resp->header, GNUNET_NO);
5249 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5250 "Monitor tunnel request from client %u completed\n",
5252 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5257 * Functions to handle messages from clients
5259 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5260 {&handle_local_new_client, NULL,
5261 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5262 {&handle_local_tunnel_create, NULL,
5263 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5264 sizeof (struct GNUNET_MESH_TunnelMessage)},
5265 {&handle_local_tunnel_destroy, NULL,
5266 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5267 sizeof (struct GNUNET_MESH_TunnelMessage)},
5268 {&handle_local_tunnel_buffer, NULL,
5269 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
5270 sizeof (struct GNUNET_MESH_TunnelMessage)},
5271 {&handle_local_tunnel_buffer, NULL,
5272 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
5273 sizeof (struct GNUNET_MESH_TunnelMessage)},
5274 {&handle_local_unicast, NULL,
5275 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
5276 {&handle_local_to_origin, NULL,
5277 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
5278 {&handle_local_ack, NULL,
5279 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5280 sizeof (struct GNUNET_MESH_LocalAck)},
5281 {&handle_local_get_tunnels, NULL,
5282 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5283 sizeof (struct GNUNET_MessageHeader)},
5284 {&handle_local_show_tunnel, NULL,
5285 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5286 sizeof (struct GNUNET_MESH_LocalMonitor)},
5292 * To be called on core init/fail.
5294 * @param cls service closure
5295 * @param server handle to the server for this service
5296 * @param identity the public identity of this peer
5299 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5300 const struct GNUNET_PeerIdentity *identity)
5303 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5304 core_handle = server;
5305 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5308 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5309 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5311 GNUNET_i2s (identity));
5312 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5314 GNUNET_i2s (&my_full_id));
5315 GNUNET_SCHEDULER_shutdown (); // Try gracefully
5317 GNUNET_abort(); // Try harder
5324 * Method called whenever a given peer connects.
5326 * @param cls closure
5327 * @param peer peer identity this notification is about
5330 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5332 struct MeshPeerInfo *peer_info;
5333 struct MeshPeerPath *path;
5335 DEBUG_CONN ("Peer connected\n");
5336 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5337 peer_info = peer_get (peer);
5338 if (myid == peer_info->id)
5340 DEBUG_CONN (" (self)\n");
5345 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5347 path = path_new (2);
5348 path->peers[0] = myid;
5349 path->peers[1] = peer_info->id;
5350 GNUNET_PEER_change_rc (myid, 1);
5351 GNUNET_PEER_change_rc (peer_info->id, 1);
5352 peer_info_add_path (peer_info, path, GNUNET_YES);
5353 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5359 * Method called whenever a peer disconnects.
5361 * @param cls closure
5362 * @param peer peer identity this notification is about
5365 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5367 struct MeshPeerInfo *pi;
5368 struct MeshPeerQueue *q;
5369 struct MeshPeerQueue *n;
5371 DEBUG_CONN ("Peer disconnected\n");
5372 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5382 /* TODO try to reroute this traffic instead */
5383 queue_destroy(q, GNUNET_YES);
5386 if (NULL != pi->core_transmit)
5388 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5389 pi->core_transmit = NULL;
5391 peer_remove_path (pi, pi->id, myid);
5394 DEBUG_CONN (" (self)\n");
5396 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5401 /******************************************************************************/
5402 /************************ MAIN FUNCTIONS ****************************/
5403 /******************************************************************************/
5406 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5408 * @param cls closure
5409 * @param key current key code
5410 * @param value value in the hash map
5411 * @return GNUNET_YES if we should continue to iterate,
5415 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5417 struct MeshTunnel *t = value;
5424 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5426 * @param cls closure
5427 * @param key current key code
5428 * @param value value in the hash map
5429 * @return GNUNET_YES if we should continue to iterate,
5433 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5435 struct MeshPeerInfo *p = value;
5436 struct MeshPeerQueue *q;
5437 struct MeshPeerQueue *n;
5445 queue_destroy(q, GNUNET_YES);
5449 peer_info_destroy (p);
5455 * Task run during shutdown.
5461 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5465 if (core_handle != NULL)
5467 GNUNET_CORE_disconnect (core_handle);
5472 GNUNET_CRYPTO_ecc_key_create_stop (keygen);
5475 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5476 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5477 if (dht_handle != NULL)
5479 GNUNET_DHT_disconnect (dht_handle);
5484 GNUNET_SERVER_notification_context_destroy (nc);
5487 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5489 GNUNET_SCHEDULER_cancel (announce_id_task);
5490 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5497 * Callback for hostkey read/generation.
5499 * @param cls Closure (Configuration handle).
5500 * @param pk The ECC private key.
5501 * @param emsg Error message, if any.
5504 key_generation_cb (void *cls,
5505 struct GNUNET_CRYPTO_EccPrivateKey *pk,
5508 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5509 struct MeshPeerInfo *peer;
5510 struct MeshPeerPath *p;
5515 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5516 _("Mesh service could not access hostkey: %s. Exiting.\n"),
5518 GNUNET_SCHEDULER_shutdown ();
5521 my_private_key = pk;
5522 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5523 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5524 &my_full_id.hashPubKey);
5525 myid = GNUNET_PEER_intern (&my_full_id);
5526 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5527 "Mesh for peer [%s] starting\n",
5528 GNUNET_i2s(&my_full_id));
5530 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5531 NULL, /* Closure passed to MESH functions */
5532 &core_init, /* Call core_init once connected */
5533 &core_connect, /* Handle connects */
5534 &core_disconnect, /* remove peers on disconnects */
5535 NULL, /* Don't notify about all incoming messages */
5536 GNUNET_NO, /* For header only in notification */
5537 NULL, /* Don't notify about all outbound messages */
5538 GNUNET_NO, /* For header-only out notification */
5539 core_handlers); /* Register these handlers */
5541 if (core_handle == NULL)
5544 GNUNET_SCHEDULER_shutdown ();
5549 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5552 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5553 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5554 GNUNET_SERVER_disconnect_notify (server_handle,
5555 &handle_local_client_disconnect, NULL);
5558 clients_head = NULL;
5559 clients_tail = NULL;
5562 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5564 /* Create a peer_info for the local peer */
5565 peer = peer_get (&my_full_id);
5568 GNUNET_PEER_change_rc (myid, 1);
5569 peer_info_add_path (peer, p, GNUNET_YES);
5570 GNUNET_SERVER_resume (server_handle);
5571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5576 * Process mesh requests.
5578 * @param cls closure
5579 * @param server the initialized server
5580 * @param c configuration to use
5583 run (void *cls, struct GNUNET_SERVER_Handle *server,
5584 const struct GNUNET_CONFIGURATION_Handle *c)
5588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5589 server_handle = server;
5592 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5595 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5597 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5598 "mesh", "peer/privatekey");
5599 GNUNET_SCHEDULER_shutdown ();
5604 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5605 &refresh_path_time))
5607 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5609 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5610 "mesh", "refresh path time");
5611 GNUNET_SCHEDULER_shutdown ();
5616 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5619 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5621 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5622 "mesh", "id announce time");
5623 GNUNET_SCHEDULER_shutdown ();
5628 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5631 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5633 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5634 "mesh", "connect timeout");
5635 GNUNET_SCHEDULER_shutdown ();
5640 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5643 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5645 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5646 "mesh", "max msgs queue");
5647 GNUNET_SCHEDULER_shutdown ();
5652 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5655 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5657 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5658 "mesh", "max tunnels");
5659 GNUNET_SCHEDULER_shutdown ();
5664 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5667 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5669 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5670 "mesh", "default ttl", 64);
5675 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5678 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5679 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5680 "mesh", "max peers", 1000);
5685 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5686 &dht_replication_level))
5688 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5690 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5691 "mesh", "dht replication level", 3);
5692 dht_replication_level = 3;
5695 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5696 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5697 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5698 types = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5700 dht_handle = GNUNET_DHT_connect (c, 64);
5701 if (NULL == dht_handle)
5705 stats = GNUNET_STATISTICS_create ("mesh", c);
5707 GNUNET_SERVER_suspend (server_handle);
5708 /* Scheduled the task to clean up when shutdown is called */
5709 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5711 keygen = GNUNET_CRYPTO_ecc_key_create_start (keyfile,
5714 GNUNET_free (keyfile);
5719 * The main function for the mesh service.
5721 * @param argc number of arguments from the command line
5722 * @param argv command line arguments
5723 * @return 0 ok, 1 on error
5726 main (int argc, char *const *argv)
5731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5732 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5734 ret = (GNUNET_OK == r) ? 0 : 1;
5735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
5739 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5740 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
5741 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);