2 This file is part of GNUnet.
3 (C) 2001-2013 Christian Grothoff (and other contributing authors)
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13 General Public License for more details.
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
41 * - relay corking down to core
42 * - set ttl relative to tree depth
43 * - Add data ACK count in path ACK
44 * - Make common GNUNET_MESH_Data header for unicast, to_orig, multicast
50 #include "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 * Struct to encapsulate all the Flow Control information to a peer in the
251 * context of a tunnel: Same peer in different tunnels will have independent
252 * flow control structures, allowing to choke/free tunnels according to its
255 struct MeshFlowControl
258 * ID of the last packet sent towards the peer.
260 uint32_t last_pid_sent;
263 * ID of the last packet received from the peer.
265 uint32_t last_pid_recv;
268 * Last ACK sent to the peer (peer can't send more than this PID).
270 uint32_t last_ack_sent;
273 * Last ACK sent towards the origin (for traffic towards leaf node).
275 uint32_t last_ack_recv;
278 * How many messages are in the queue towards this peer.
283 * Task to poll the peer in case of a lost ACK causes stall.
285 GNUNET_SCHEDULER_TaskIdentifier poll_task;
288 * How frequently to poll for ACKs.
290 struct GNUNET_TIME_Relative poll_time;
293 * On which tunnel to poll.
294 * Using an explicit poll_ctx would not help memory wise,
295 * since the allocated context would have to be stored in the
296 * fc struct in order to free it upon cancelling poll_task.
298 struct MeshTunnel *t;
303 * Globally unique tunnel identification (owner + number)
304 * DO NOT USE OVER THE NETWORK
309 * Node that owns the tunnel
314 * Tunnel number to differentiate all the tunnels owned by the node oid
315 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
317 MESH_TunnelNumber tid;
322 * Struct containing all information regarding a tunnel
323 * For an intermediate node the improtant info used will be:
324 * - id Tunnel unique identification
325 * - paths[0] To know where to send it next
326 * - metainfo: ready, speeds, accounting
333 struct MESH_TunnelID id;
336 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
338 MESH_TunnelNumber local_tid;
341 * Local tunnel number for local destination clients (incoming number)
342 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
345 MESH_TunnelNumber local_tid_dest;
348 * Is the tunnel bufferless (minimum latency)?
353 * Force sending ACK? Flag to allow duplicate ACK on POLL.
358 * How many messages do we accept in the forward queue.
360 unsigned int queue_max;
363 * Last time the tunnel was used
365 struct GNUNET_TIME_Absolute timestamp;
368 * Destination of the tunnel.
373 * Next hop in the tunnel. If 0, @c client must be set.
375 GNUNET_PEER_Id next_hop;
378 * Previous hop in the tunnel. If 0, @c owner must be set.
380 GNUNET_PEER_Id prev_hop;
383 * Flow control information about @c next_hop or @c client.
385 struct MeshFlowControl next_fc;
388 * Flow control information about @c prev_hop or @c owner.
390 struct MeshFlowControl prev_fc;
393 * Client owner of the tunnel, if any
395 struct MeshClient *owner;
398 * Client destination of the tunnel, if any.
400 struct MeshClient *client;
403 * Task to keep the used paths alive at the owner,
404 * time tunnel out on all the other peers.
406 GNUNET_SCHEDULER_TaskIdentifier maintenance_task;
409 * Path being used for the tunnel.
411 struct MeshPeerPath *path;
414 * Flag to signal the destruction of the tunnel.
415 * If this is set GNUNET_YES the tunnel will be destroyed
416 * when the queue is empty.
421 * Total messages pending for this tunnels, payload or not.
423 unsigned int pending_messages;
428 * Struct containing information about a client of the service
430 * TODO: add a list of 'waiting' types
437 struct MeshClient *next;
442 struct MeshClient *prev;
445 * Tunnels that belong to this client, indexed by local id
447 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
450 * Tunnels this client has accepted, indexed by incoming local id
452 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
455 * Handle to communicate with the client
457 struct GNUNET_SERVER_Client *handle;
460 * Messages that this client has declared interest in.
461 * Indexed by a GMC_hash32 (type), contains *Client.
463 struct GNUNET_CONTAINER_MultiHashMap *types;
466 * Whether the client is active or shutting down (don't send confirmations
467 * to a client that is shutting down.
472 * ID of the client, mainly for debug messages
479 /******************************************************************************/
480 /************************ DEBUG FUNCTIONS ****************************/
481 /******************************************************************************/
485 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
486 * @param cls string to print
487 * @param success GNUNET_OK if the PUT was transmitted,
488 * GNUNET_NO on timeout,
489 * GNUNET_SYSERR on disconnect from service
490 * after the PUT message was transmitted
491 * (so we don't know if it was received or not)
496 mesh_debug (void *cls, int success)
500 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
504 unsigned int debug_fwd_ack;
505 unsigned int debug_bck_ack;
509 /******************************************************************************/
510 /*********************** GLOBAL VARIABLES ****************************/
511 /******************************************************************************/
513 /************************** Configuration parameters **************************/
516 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
518 static struct GNUNET_TIME_Relative refresh_path_time;
521 * How often to PUT own ID in the DHT.
523 static struct GNUNET_TIME_Relative id_announce_time;
526 * Maximum time allowed to connect to a peer found by string.
528 static struct GNUNET_TIME_Relative connect_timeout;
531 * Default TTL for payload packets.
533 static unsigned long long default_ttl;
536 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
538 static unsigned long long dht_replication_level;
541 * How many tunnels are we willing to maintain.
542 * Local tunnels are always allowed, even if there are more tunnels than max.
544 static unsigned long long max_tunnels;
547 * How many messages *in total* are we willing to queue, divided by number of
548 * tunnels to get tunnel queue size.
550 static unsigned long long max_msgs_queue;
553 * How many peers do we want to remember?
555 static unsigned long long max_peers;
558 /*************************** Static global variables **************************/
561 * Hostkey generation context
563 static struct GNUNET_CRYPTO_EccKeyGenerationContext *keygen;
566 * DLL with all the clients, head.
568 static struct MeshClient *clients_head;
571 * DLL with all the clients, tail.
573 static struct MeshClient *clients_tail;
576 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
578 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
581 * Number of tunnels known.
583 static unsigned long long n_tunnels;
586 * Tunnels incoming, indexed by MESH_TunnelNumber
587 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
589 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
592 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
594 static struct GNUNET_CONTAINER_MultiHashMap *peers;
597 * Handle to communicate with transport
599 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
602 * Handle to communicate with core.
604 static struct GNUNET_CORE_Handle *core_handle;
609 static struct GNUNET_DHT_Handle *dht_handle;
614 static struct GNUNET_SERVER_Handle *server_handle;
617 * Handle to the statistics service.
619 static struct GNUNET_STATISTICS_Handle *stats;
622 * Notification context, to send messages to local clients.
624 static struct GNUNET_SERVER_NotificationContext *nc;
627 * Local peer own ID (memory efficient handle).
629 static GNUNET_PEER_Id myid;
632 * Local peer own ID (full value).
634 static struct GNUNET_PeerIdentity my_full_id;
639 static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
644 static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key;
647 * Tunnel ID for the next created tunnel (global tunnel number).
649 static MESH_TunnelNumber next_tid;
652 * Tunnel ID for the next incoming tunnel (local tunnel number).
654 static MESH_TunnelNumber next_local_tid;
657 * All message types clients of this peer are interested in.
659 static struct GNUNET_CONTAINER_MultiHashMap *types;
662 * Task to periodically announce itself in the network.
664 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
667 * Next ID to assign to a client.
669 unsigned int next_client_id;
672 /******************************************************************************/
673 /*********************** DECLARATIONS **************************/
674 /******************************************************************************/
677 * Function to process paths received for a new peer addition. The recorded
678 * paths form the initial tunnel, which can be optimized later.
679 * Called on each result obtained for the DHT search.
682 * @param exp when will this value expire
683 * @param key key of the result
684 * @param type type of the result
685 * @param size number of bytes in data
686 * @param data pointer to the result data
689 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
690 const struct GNUNET_HashCode * key,
691 const struct GNUNET_PeerIdentity *get_path,
692 unsigned int get_path_length,
693 const struct GNUNET_PeerIdentity *put_path,
694 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
695 size_t size, const void *data);
699 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
700 * and insert it in the appropiate structures if the peer is not known yet.
702 * @param peer Full identity of the peer.
704 * @return Existing or newly created peer info.
706 static struct MeshPeerInfo *
707 peer_get (const struct GNUNET_PeerIdentity *peer);
711 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
712 * and insert it in the appropiate structures if the peer is not known yet.
714 * @param peer Short identity of the peer.
716 * @return Existing or newly created peer info.
718 static struct MeshPeerInfo *
719 peer_get_short (const GNUNET_PEER_Id peer);
723 * Build a PeerPath from the paths returned from the DHT, reversing the paths
724 * to obtain a local peer -> destination path and interning the peer ids.
726 * @return Newly allocated and created path
728 static struct MeshPeerPath *
729 path_build_from_dht (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);
736 * Adds a path to the peer_infos of all the peers in the path
738 * @param p Path to process.
739 * @param confirmed Whether we know if the path works or not.
742 path_add_to_peers (struct MeshPeerPath *p, int confirmed);
747 * Search for a tunnel by global ID using full PeerIdentities.
749 * @param oid owner of the tunnel.
750 * @param tid global tunnel number.
752 * @return tunnel handler, NULL if doesn't exist.
754 static struct MeshTunnel *
755 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
759 * Notify a tunnel that a connection has broken that affects at least
762 * @param t Tunnel affected.
763 * @param p1 Peer that got disconnected from p2.
764 * @param p2 Peer that got disconnected from p1.
766 * @return Short ID of the peer disconnected (either p1 or p2).
767 * 0 if the tunnel remained unaffected.
769 static GNUNET_PEER_Id
770 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
775 * Use the given path for the tunnel.
777 * @param t Tunnel to update.
778 * @param p Path to use.
781 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p);
784 * @brief Queue and pass message to core when possible.
786 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
787 * and accounts for it. In case the queue is full, the message is dropped and
790 * Otherwise, message is treated as internal and allowed to go regardless of
793 * @param cls Closure (@c type dependant). It will be used by queue_send to
794 * build the message to be sent if not already prebuilt.
795 * @param type Type of the message, 0 for a raw message.
796 * @param size Size of the message.
797 * @param dst Neighbor to send message to.
798 * @param t Tunnel this message belongs to.
801 queue_add (void *cls, uint16_t type, size_t size,
802 struct MeshPeerInfo *dst, struct MeshTunnel *t);
806 * Free a transmission that was already queued with all resources
807 * associated to the request.
809 * @param queue Queue handler to cancel.
810 * @param clear_cls Is it necessary to free associated cls?
813 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
817 * @brief Get the next transmittable message from the queue.
819 * This will be the head, except in the case of being a data packet
820 * not allowed by the destination peer.
822 * @param peer Destination peer.
824 * @return The next viable MeshPeerQueue element to send to that peer.
825 * NULL when there are no transmittable messages.
827 struct MeshPeerQueue *
828 queue_get_next (const struct MeshPeerInfo *peer);
832 * Core callback to write a queued packet to core buffer
834 * @param cls Closure (peer info).
835 * @param size Number of bytes available in buf.
836 * @param buf Where the to write the message.
838 * @return number of bytes written to buf
841 queue_send (void *cls, size_t size, void *buf);
844 /******************************************************************************/
845 /************************ PERIODIC FUNCTIONS ****************************/
846 /******************************************************************************/
849 * Periodically announce self id in the DHT
852 * @param tc task context
855 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
859 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
861 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
865 * - Set data expiration in function of X
868 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
870 block.id = my_full_id;
871 block.type = htonl (0);
872 GNUNET_DHT_put (dht_handle, /* DHT handle */
873 &my_full_id.hashPubKey, /* Key to use */
874 dht_replication_level, /* Replication level */
875 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
876 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
877 sizeof (block), /* Size of the data */
878 (const char *) &block, /* Data itself */
879 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
880 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
881 NULL, /* Continuation */
882 NULL); /* Continuation closure */
884 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
888 /******************************************************************************/
889 /****************** GENERAL HELPER FUNCTIONS ************************/
890 /******************************************************************************/
894 * Check if client has registered with the service and has not disconnected
896 * @param client the client to check
898 * @return non-NULL if client exists in the global DLL
900 static struct MeshClient *
901 client_get (struct GNUNET_SERVER_Client *client)
903 struct MeshClient *c;
908 if (c->handle == client)
917 * Deletes a tunnel from a client (either owner or destination). To be used on
920 * @param c Client whose tunnel to delete.
921 * @param t Tunnel which should be deleted.
924 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
926 struct GNUNET_HashCode hash;
930 GMC_hash32 (t->local_tid, &hash);
931 GNUNET_assert (GNUNET_YES ==
932 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
936 else if (c == t->client)
938 GMC_hash32 (t->local_tid_dest, &hash);
939 GNUNET_assert (GNUNET_YES ==
940 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
952 * Notify all clients (not depending on registration status) that the incoming
953 * tunnel is no longer valid.
955 * @param t Tunnel that was destroyed.
958 send_client_tunnel_destroy (struct MeshTunnel *t)
960 struct GNUNET_MESH_TunnelMessage msg;
962 if (NULL == t->client)
964 msg.header.size = htons (sizeof (msg));
965 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
966 msg.tunnel_id = htonl (t->local_tid_dest);
967 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
968 &msg.header, GNUNET_NO);
973 * Iterator over all the peers to remove the oldest not-used entry.
975 * @param cls Closure (unsued).
976 * @param key ID of the peer.
977 * @param value Peer_Info of the peer.
982 peer_info_timeout (void *cls,
983 const struct GNUNET_HashCode *key,
990 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
991 * and insert it in the appropiate structures if the peer is not known yet.
993 * @param peer Full identity of the peer.
995 * @return Existing or newly created peer info.
997 static struct MeshPeerInfo *
998 peer_get (const struct GNUNET_PeerIdentity *peer)
1000 struct MeshPeerInfo *peer_info;
1002 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1003 if (NULL == peer_info)
1006 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1007 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1009 GNUNET_CONTAINER_multihashmap_iterate (peers,
1013 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1014 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1015 peer_info->id = GNUNET_PEER_intern (peer);
1017 peer_info->last_contact = GNUNET_TIME_absolute_get();
1024 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1025 * and insert it in the appropiate structures if the peer is not known yet.
1027 * @param peer Short identity of the peer.
1029 * @return Existing or newly created peer info.
1031 static struct MeshPeerInfo *
1032 peer_get_short (const GNUNET_PEER_Id peer)
1034 struct GNUNET_PeerIdentity id;
1036 GNUNET_PEER_resolve (peer, &id);
1037 return peer_get (&id);
1042 * Choose the best path towards a peer considering the tunnel properties.
1044 * @param peer The destination peer.
1045 * @param t The tunnel the path is for.
1047 * @return Best current known path towards the peer, if any.
1049 static struct MeshPeerPath *
1050 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1052 struct MeshPeerPath *best_p;
1053 struct MeshPeerPath *p;
1054 unsigned int best_cost;
1057 best_p = p = peer->path_head;
1058 best_cost = cost = p->length;
1061 if ((cost = p->length) < best_cost)
1073 * Remove the tunnel from the list of tunnels to which a peer is target.
1075 * @param peer PeerInfo of the peer.
1076 * @param t Tunnel to remove.
1079 peer_remove_tunnel (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1083 for (i = 0; i < peer->ntunnels; i++)
1086 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1089 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1091 GNUNET_realloc (peer->tunnels,
1092 peer->ntunnels * sizeof(struct MeshTunnel *));
1100 * Core callback to write a pre-constructed data packet to core buffer
1102 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1103 * @param size Number of bytes available in buf.
1104 * @param buf Where the to write the message.
1106 * @return number of bytes written to buf
1109 send_core_data_raw (void *cls, size_t size, void *buf)
1111 struct MeshTransmissionDescriptor *info = cls;
1112 struct GNUNET_MessageHeader *msg;
1115 GNUNET_assert (NULL != info);
1116 msg = (struct GNUNET_MessageHeader *) info->data;
1117 total_size = ntohs (msg->size);
1119 if (total_size > size)
1124 memcpy (buf, msg, total_size);
1125 GNUNET_free (info->data);
1132 * Sends an already built message to a peer, properly registrating
1133 * all used resources.
1135 * @param message Message to send. Function makes a copy of it.
1136 * @param peer Short ID of the neighbor whom to send the message.
1137 * @param t Tunnel on which this message is transmitted.
1140 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1141 GNUNET_PEER_Id peer,
1142 struct MeshTunnel *t)
1144 struct MeshTransmissionDescriptor *info;
1145 struct GNUNET_PeerIdentity id;
1146 struct MeshPeerInfo *neighbor;
1147 struct MeshPeerPath *p;
1151 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1156 size = ntohs (message->size);
1157 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
1158 info->data = GNUNET_malloc (size);
1159 memcpy (info->data, message, size);
1160 type = ntohs(message->type);
1163 struct GNUNET_MESH_Unicast *m;
1164 struct GNUNET_MESH_ToOrigin *to;
1166 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1167 m = (struct GNUNET_MESH_Unicast *) info->data;
1168 m->ttl = htonl (ntohl (m->ttl) - 1);
1170 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1171 to = (struct GNUNET_MESH_ToOrigin *) info->data;
1172 t->prev_fc.last_pid_sent++; /* FIXME per hop? */
1173 to->pid = htonl (t->prev_fc.last_pid_sent);
1175 info->data_len = size;
1176 GNUNET_PEER_resolve (peer, &id);
1177 neighbor = peer_get (&id);
1178 for (p = neighbor->path_head; NULL != p; p = p->next)
1188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1189 " %s IS NOT DIRECTLY CONNECTED\n",
1191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1194 for (p = neighbor->path_head; NULL != p; p = p->next)
1196 struct GNUNET_PeerIdentity debug_id;
1199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1200 " path with %u hops through:\n",
1202 for (i = 0; i < p->length; i++)
1204 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1207 i, GNUNET_i2s(&debug_id));
1211 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
1212 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
1213 " no direct connection to %s\n",
1215 GNUNET_free (info->data);
1219 info->peer = neighbor;
1220 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1231 * Sends a CREATE PATH message for a path to a peer, properly registrating
1232 * all used resources.
1234 * @param peer PeerInfo of the final peer for whom this path is being created.
1235 * @param p Path itself.
1236 * @param t Tunnel for which the path is created.
1239 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
1240 struct MeshTunnel *t)
1242 struct MeshPeerInfo *neighbor;
1250 neighbor = peer_get_short (t->next_hop);
1252 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1253 sizeof (struct GNUNET_MESH_ManipulatePath) +
1254 (p->length * sizeof (struct GNUNET_PeerIdentity)),
1261 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1263 * @param t Tunnel which to confirm.
1266 send_path_ack (struct MeshTunnel *t)
1268 struct MeshTransmissionDescriptor *info;
1269 struct GNUNET_PeerIdentity id;
1271 GNUNET_PEER_resolve (t->prev_hop, &id);
1272 info = GNUNET_malloc (sizeof (struct MeshTransmissionDescriptor));
1273 info->origin = &t->id;
1274 info->peer = GNUNET_CONTAINER_multihashmap_get (peers, &id.hashPubKey);
1275 GNUNET_assert (NULL != info->peer);
1278 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1279 sizeof (struct GNUNET_MESH_PathACK),
1286 * Try to establish a new connection to this peer in the fiven tunnel.
1287 * If the peer doesn't have any path to it yet, try to get one.
1288 * If the peer already has some path, send a CREATE PATH towards it.
1290 * @param peer PeerInfo of the peer.
1291 * @param t Tunnel for which to create the path, if possible.
1294 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1296 struct MeshPeerPath *p;
1298 if (NULL != peer->path_head)
1300 p = peer_get_best_path (peer, t);
1301 tunnel_use_path (t, p);
1302 send_create_path (peer, p, t);
1304 else if (NULL == peer->dhtget)
1306 struct GNUNET_PeerIdentity id;
1308 GNUNET_PEER_resolve (peer->id, &id);
1309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1310 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1311 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1312 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1313 &id.hashPubKey, /* key to search */
1314 dht_replication_level, /* replication level */
1315 GNUNET_DHT_RO_RECORD_ROUTE |
1316 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1318 0, /* xquery bits */
1319 &dht_get_id_handler, peer);
1321 /* Otherwise, there is no path but the DHT get is already started. */
1326 * Destroy the peer_info and free any allocated resources linked to it
1328 * @param pi The peer_info to destroy.
1330 * @return GNUNET_OK on success
1333 peer_info_destroy (struct MeshPeerInfo *pi)
1335 struct GNUNET_PeerIdentity id;
1336 struct MeshPeerPath *p;
1337 struct MeshPeerPath *nextp;
1339 GNUNET_PEER_resolve (pi->id, &id);
1340 GNUNET_PEER_change_rc (pi->id, -1);
1343 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1346 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1347 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1349 if (NULL != pi->dhtget)
1351 GNUNET_DHT_get_stop (pi->dhtget);
1357 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1367 * Remove all paths that rely on a direct connection between p1 and p2
1368 * from the peer itself and notify all tunnels about it.
1370 * @param peer PeerInfo of affected peer.
1371 * @param p1 GNUNET_PEER_Id of one peer.
1372 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1375 * TODO: optimize (see below)
1378 peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1381 struct MeshPeerPath *p;
1382 struct MeshPeerPath *next;
1383 struct MeshPeerInfo *peer_d;
1385 unsigned int destroyed;
1388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1390 for (p = peer->path_head; NULL != p; p = next)
1393 for (i = 0; i < (p->length - 1); i++)
1395 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1396 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1398 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1408 for (i = 0; i < peer->ntunnels; i++)
1410 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1414 peer_d = peer_get_short (d);
1415 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1416 tunnel_use_path (peer->tunnels[i], next);
1417 peer_connect (peer_d, peer->tunnels[i]);
1419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1424 * Add the path to the peer and update the path used to reach it in case this
1427 * @param peer_info Destination peer to add the path to.
1428 * @param path New path to add. Last peer must be the peer in arg 1.
1429 * Path will be either used of freed if already known.
1430 * @param trusted Do we trust that this path is real?
1433 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1436 struct MeshPeerPath *aux;
1440 if ((NULL == peer_info) || (NULL == path))
1443 path_destroy (path);
1446 if (path->peers[path->length - 1] != peer_info->id)
1449 path_destroy (path);
1452 if (path->length <= 2 && GNUNET_NO == trusted)
1454 /* Only allow CORE to tell us about direct paths */
1455 path_destroy (path);
1458 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1459 for (l = 1; l < path->length; l++)
1461 if (path->peers[l] == myid)
1463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1464 for (l2 = 0; l2 < path->length - l; l2++)
1466 path->peers[l2] = path->peers[l + l2];
1471 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1476 struct GNUNET_PeerIdentity id;
1478 GNUNET_PEER_resolve (peer_info->id, &id);
1479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1480 path->length, GNUNET_i2s (&id));
1483 l = path_get_length (path);
1490 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1491 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1493 l2 = path_get_length (aux);
1496 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1497 peer_info->path_tail, aux, path);
1502 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1504 path_destroy (path);
1509 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1516 * Add the path to the origin peer and update the path used to reach it in case
1517 * this is the shortest.
1518 * The path is given in peer_info -> destination, therefore we turn the path
1519 * upside down first.
1521 * @param peer_info Peer to add the path to, being the origin of the path.
1522 * @param path New path to add after being inversed.
1523 * @param trusted Do we trust that this path is real?
1526 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1527 struct MeshPeerPath *path, int trusted)
1530 peer_info_add_path (peer_info, path, trusted);
1535 * Function called if the connection to the peer has been stalled for a while,
1536 * possibly due to a missed ACK. Poll the peer about its ACK status.
1538 * @param cls Closure (poll ctx).
1539 * @param tc TaskContext.
1542 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1544 struct MeshFlowControl *fc = cls;
1545 struct GNUNET_MESH_Poll msg;
1546 struct MeshTunnel *t = fc->t;
1547 GNUNET_PEER_Id peer;
1549 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1550 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1555 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
1556 msg.header.size = htons (sizeof (msg));
1557 msg.tid = htonl (t->id.tid);
1558 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1559 msg.last_ack = htonl (fc->last_ack_recv);
1561 if (fc == &t->prev_fc)
1569 send_prebuilt_message (&msg.header, peer, t);
1570 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
1571 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
1577 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1578 * to obtain a local peer -> destination path and interning the peer ids.
1580 * @return Newly allocated and created path
1582 static struct MeshPeerPath *
1583 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1584 unsigned int get_path_length,
1585 const struct GNUNET_PeerIdentity *put_path,
1586 unsigned int put_path_length)
1588 struct MeshPeerPath *p;
1594 GNUNET_PEER_change_rc (myid, 1);
1595 i = get_path_length;
1596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1597 for (i--; i >= 0; i--)
1599 id = GNUNET_PEER_intern (&get_path[i]);
1600 if (p->length > 0 && id == p->peers[p->length - 1])
1602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1603 GNUNET_PEER_change_rc (id, -1);
1607 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1608 GNUNET_i2s (&get_path[i]));
1610 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1611 p->peers[p->length - 1] = id;
1614 i = put_path_length;
1615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1616 for (i--; i >= 0; i--)
1618 id = GNUNET_PEER_intern (&put_path[i]);
1621 /* PUT path went through us, so discard the path up until now and start
1622 * from here to get a much shorter (and loop-free) path.
1627 if (p->length > 0 && id == p->peers[p->length - 1])
1629 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1630 GNUNET_PEER_change_rc (id, -1);
1634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1635 GNUNET_i2s (&put_path[i]));
1637 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1638 p->peers[p->length - 1] = id;
1642 if (get_path_length > 0)
1643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1644 GNUNET_i2s (&get_path[0]));
1645 if (put_path_length > 0)
1646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1647 GNUNET_i2s (&put_path[0]));
1648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1650 for (i = 0; i < p->length; i++)
1652 struct GNUNET_PeerIdentity peer_id;
1654 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1656 GNUNET_i2s (&peer_id));
1664 * Adds a path to the peer_infos of all the peers in the path
1666 * @param p Path to process.
1667 * @param confirmed Whether we know if the path works or not.
1670 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1674 /* TODO: invert and add */
1675 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1676 for (i++; i < p->length; i++)
1678 struct MeshPeerInfo *aux;
1679 struct MeshPeerPath *copy;
1681 aux = peer_get_short (p->peers[i]);
1682 copy = path_duplicate (p);
1683 copy->length = i + 1;
1684 peer_info_add_path (aux, copy, GNUNET_NO);
1690 * Send keepalive packets for a peer
1692 * @param cls Closure (tunnel for which to send the keepalive).
1693 * @param tc Notification context.
1696 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1700 * Search for a tunnel among the incoming tunnels
1702 * @param tid the local id of the tunnel
1704 * @return tunnel handler, NULL if doesn't exist
1706 static struct MeshTunnel *
1707 tunnel_get_incoming (MESH_TunnelNumber tid)
1709 struct GNUNET_HashCode hash;
1711 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1712 GMC_hash32 (tid, &hash);
1713 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1718 * Search for a tunnel among the tunnels for a client
1720 * @param c the client whose tunnels to search in
1721 * @param tid the local id of the tunnel
1723 * @return tunnel handler, NULL if doesn't exist
1725 static struct MeshTunnel *
1726 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1728 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1730 return tunnel_get_incoming (tid);
1734 struct GNUNET_HashCode hash;
1736 GMC_hash32 (tid, &hash);
1737 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
1743 * Search for a tunnel by global ID using PEER_ID
1745 * @param pi owner of the tunnel
1746 * @param tid global tunnel number
1748 * @return tunnel handler, NULL if doesn't exist
1750 static struct MeshTunnel *
1751 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1753 struct MESH_TunnelID id;
1754 struct GNUNET_HashCode hash;
1759 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1760 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1765 * Search for a tunnel by global ID using full PeerIdentities
1767 * @param oid owner of the tunnel
1768 * @param tid global tunnel number
1770 * @return tunnel handler, NULL if doesn't exist
1772 static struct MeshTunnel *
1773 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1775 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1780 * Add a client to a tunnel, initializing all needed data structures.
1782 * FIXME: make static after implementing port numbers
1784 * @param t Tunnel to which add the client.
1785 * @param c Client which to add to the tunnel.
1788 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
1790 if (NULL != t->client)
1795 if (0 != t->next_hop)
1805 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1809 for (i = 0; i < p->length; i++)
1811 if (p->peers[i] == myid)
1814 if (i > p->length - 1)
1820 if (i < p->length - 1)
1821 t->next_hop = p->peers[i + 1];
1825 t->prev_hop = p->peers[i - 1];
1829 if (NULL != t->path)
1830 path_destroy (t->path);
1831 t->path = path_duplicate (p);
1832 if (GNUNET_SCHEDULER_NO_TASK == t->maintenance_task)
1833 t->maintenance_task =
1834 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
1839 * Notifies a tunnel that a connection has broken that affects at least
1840 * some of its peers. Sends a notification towards the root of the tree.
1841 * In case the peer is the owner of the tree, notifies the client that owns
1842 * the tunnel and tries to reconnect.
1844 * @param t Tunnel affected.
1845 * @param p1 Peer that got disconnected from p2.
1846 * @param p2 Peer that got disconnected from p1.
1848 * @return Short ID of the peer disconnected (either p1 or p2).
1849 * 0 if the tunnel remained unaffected.
1851 static GNUNET_PEER_Id
1852 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1855 // if (myid != p1 && myid != p2) FIXME
1860 // if (tree_get_predecessor (t->tree) != 0)
1862 // /* We are the peer still connected, notify owner of the disconnection. */
1863 // struct GNUNET_MESH_PathBroken msg;
1864 // struct GNUNET_PeerIdentity neighbor;
1866 // msg.header.size = htons (sizeof (msg));
1867 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1868 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1869 // msg.tid = htonl (t->id.tid);
1870 // msg.peer1 = my_full_id;
1871 // GNUNET_PEER_resolve (pid, &msg.peer2);
1872 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
1873 // send_prebuilt_message (&msg.header, &neighbor, t);
1880 * Build a local ACK message and send it to a local client.
1882 * @param t Tunnel on which to send the ACK.
1883 * @param c Client to whom send the ACK.
1884 * @param ack Value of the ACK.
1887 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
1889 struct GNUNET_MESH_LocalAck msg;
1891 msg.header.size = htons (sizeof (msg));
1892 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1893 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
1894 msg.max_pid = htonl (ack);
1895 GNUNET_SERVER_notification_context_unicast(nc,
1902 * Build an ACK message and queue it to send to the given peer.
1904 * @param t Tunnel on which to send the ACK.
1905 * @param peer Peer to whom send the ACK.
1906 * @param ack Value of the ACK.
1909 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
1911 struct GNUNET_MESH_ACK msg;
1913 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1914 msg.header.size = htons (sizeof (msg));
1915 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
1916 msg.pid = htonl (ack);
1917 msg.tid = htonl (t->id.tid);
1919 send_prebuilt_message (&msg.header, peer, t);
1924 * Send an ACK informing the predecessor about the available buffer space.
1925 * In case there is no predecessor, inform the owning client.
1926 * If buffering is off, send only on behalf of children or self if endpoint.
1927 * If buffering is on, send when sent to children and buffer space is free.
1928 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
1929 * the ACK itself goes "back" (towards root).
1931 * @param t Tunnel on which to send the ACK.
1932 * @param type Type of message that triggered the ACK transmission.
1935 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
1939 /* Is it after unicast retransmission? */
1942 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1944 "ACK due to FWD DATA retransmission\n");
1945 if (GNUNET_YES == t->nobuffer)
1947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
1951 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1952 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
1954 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1955 t->force_ack = GNUNET_YES;
1961 /* Check if we need to transmit the ACK */
1962 if (t->queue_max > t->next_fc.queue_n * 4 &&
1963 GMC_is_pid_bigger(t->prev_fc.last_ack_sent, t->prev_fc.last_pid_recv) &&
1964 GNUNET_NO == t->force_ack)
1966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
1967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1968 " t->qmax: %u, t->qn: %u\n",
1969 t->queue_max, t->next_fc.queue_n);
1970 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1971 " t->pid: %u, t->ack: %u\n",
1972 t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent);
1976 /* Ok, ACK might be necessary, what PID to ACK? */
1977 ack = t->prev_fc.last_pid_recv + t->queue_max - t->next_fc.queue_n;
1978 if (ack == t->prev_fc.last_ack_sent && GNUNET_NO == t->force_ack)
1980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
1984 t->prev_fc.last_ack_sent = ack;
1985 if (0 != t->prev_hop)
1986 send_ack (t, t->prev_hop, ack);
1987 else if (NULL != t->owner)
1988 send_local_ack (t, t->owner, ack);
1992 t->force_ack = GNUNET_NO;
1997 * Send an ACK informing the children node/client about the available
1999 * If buffering is off, send only on behalf of root (can be self).
2000 * If buffering is on, send when sent to predecessor and buffer space is free.
2001 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
2002 * the ACK itself goes "forward" (towards children/clients).
2004 * @param t Tunnel on which to send the ACK.
2005 * @param type Type of message that triggered the ACK transmission.
2008 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
2011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2012 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
2013 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
2014 /* Is it after data to_origin retransmission? */
2017 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2018 if (GNUNET_YES == t->nobuffer)
2020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2021 " Not sending ACK, nobuffer + traffic\n");
2025 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2026 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2028 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2029 t->force_ack = GNUNET_YES;
2035 ack = t->next_fc.last_pid_recv + t->queue_max - t->prev_fc.queue_n;
2037 if (t->next_fc.last_ack_sent == ack && GNUNET_NO == t->force_ack)
2039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2040 " Not sending ACK, not needed\n");
2043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2044 " Sending BCK ACK %u (last sent: %u)\n",
2045 ack, t->next_fc.last_ack_sent);
2046 t->next_fc.last_ack_sent = ack;
2048 if (0 != t->next_hop)
2049 send_ack (t, t->next_hop, ack);
2050 else if (NULL != t->client)
2051 send_local_ack (t, t->client, ack);
2054 t->force_ack = GNUNET_NO;
2059 * @brief Re-initiate traffic to this peer if necessary.
2061 * Check if there is traffic queued towards this peer
2062 * and the core transmit handle is NULL (traffic was stalled).
2063 * If so, call core tmt rdy.
2065 * @param peer_id Short ID of peer to which initiate traffic.
2068 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2070 struct MeshPeerInfo *peer;
2071 struct GNUNET_PeerIdentity id;
2072 struct MeshPeerQueue *q;
2075 peer = peer_get_short (peer_id);
2076 if (NULL != peer->core_transmit)
2079 q = queue_get_next (peer);
2082 /* Might br multicast traffic already sent to this particular peer but
2083 * not to other children in this tunnel.
2084 * This way t->queue_n would be > 0 but the queue of this particular peer
2090 GNUNET_PEER_resolve (peer->id, &id);
2091 peer->core_transmit =
2092 GNUNET_CORE_notify_transmit_ready(core_handle,
2095 GNUNET_TIME_UNIT_FOREVER_REL,
2105 * Send a message to all peers in this tunnel that the tunnel is no longer
2108 * @param t The tunnel whose peers to notify.
2111 tunnel_send_destroy (struct MeshTunnel *t)
2113 struct GNUNET_MESH_TunnelDestroy msg;
2114 struct GNUNET_PeerIdentity id;
2116 msg.header.size = htons (sizeof (msg));
2117 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2118 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2119 msg.tid = htonl (t->id.tid);
2120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2121 " sending tunnel destroy for tunnel: %s [%X]\n",
2122 GNUNET_i2s (&msg.oid), t->id.tid);
2124 if (0 != t->next_hop)
2126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2127 GNUNET_PEER_resolve (t->next_hop, &id);
2128 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2129 " sending forward to %s\n",
2131 send_prebuilt_message (&msg.header, t->next_hop, t);
2133 if (0 != t->prev_hop)
2135 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2136 GNUNET_PEER_resolve (t->prev_hop, &id);
2137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2138 " sending back to %s\n",
2140 send_prebuilt_message (&msg.header, t->prev_hop, t);
2146 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2148 * @param t Tunnel which to cancel.
2149 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2152 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2154 struct MeshPeerInfo *peer_info;
2155 struct MeshPeerQueue *pq;
2156 struct MeshPeerQueue *next;
2158 peer_info = peer_get_short (neighbor);
2159 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2162 if (pq->tunnel == t)
2164 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2165 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2167 // Should have been removed on destroy children
2170 queue_destroy (pq, GNUNET_YES);
2173 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2175 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2176 peer_info->core_transmit = NULL;
2182 * Destroy the tunnel and free any allocated resources linked to it.
2184 * @param t the tunnel to destroy
2186 * @return GNUNET_OK on success
2189 tunnel_destroy (struct MeshTunnel *t)
2191 struct MeshClient *c;
2192 struct GNUNET_HashCode hash;
2202 struct GNUNET_PeerIdentity id;
2204 GNUNET_PEER_resolve (t->id.oid, &id);
2205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2206 GNUNET_i2s (&id), t->id.tid);
2208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2212 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2213 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2221 GMC_hash32 (t->local_tid, &hash);
2223 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2230 if (NULL != t->client)
2232 GMC_hash32 (t->local_tid_dest, &hash);
2234 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2241 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2247 peer_cancel_queues (t->next_hop, t);
2248 peer_cancel_queues (t->prev_hop, t);
2250 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2251 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2254 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2259 #define TUNNEL_DESTROY_EMPTY_TIME GNUNET_TIME_UNIT_MILLISECONDS
2262 * Tunnel is empty: destroy it.
2264 * @param t Tunnel to destroy.
2267 tunnel_destroy_empty (struct MeshTunnel *t)
2271 struct GNUNET_PeerIdentity id;
2273 GNUNET_PEER_resolve (t->id.oid, &id);
2274 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2275 "executing destruction of empty tunnel %s [%X]\n",
2276 GNUNET_i2s (&id), t->id.tid);
2280 tunnel_send_destroy (t);
2281 if (0 == t->pending_messages)
2284 t->destroy = GNUNET_YES;
2288 * Initialize a Flow Control structure to the initial state.
2290 * @param fc Flow Control structure to initialize.
2293 fc_init (struct MeshFlowControl *fc)
2295 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2296 fc->last_pid_recv = (uint32_t) -1;
2297 fc->last_ack_sent = INITIAL_WINDOW_SIZE - 1;
2298 fc->last_ack_recv = INITIAL_WINDOW_SIZE - 1;
2299 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2300 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2305 * Create a new tunnel
2307 * @param owner Who is the owner of the tunnel (short ID).
2308 * @param tid Tunnel Number of the tunnel.
2309 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2310 * @param local Tunnel Number for the tunnel, for the client point of view.
2312 * @return A new initialized tunnel. NULL on error.
2314 static struct MeshTunnel *
2315 tunnel_new (GNUNET_PEER_Id owner,
2316 MESH_TunnelNumber tid,
2317 struct MeshClient *client,
2318 MESH_TunnelNumber local)
2320 struct MeshTunnel *t;
2321 struct GNUNET_HashCode hash;
2323 if (n_tunnels >= max_tunnels && NULL == client)
2326 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2329 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2331 fc_init (&t->next_fc);
2332 fc_init (&t->prev_fc);
2333 t->local_tid = local;
2335 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2337 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2339 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2340 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2347 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2354 GMC_hash32 (t->local_tid, &hash);
2356 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
2357 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2361 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2372 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2373 * client when the client disconnects. If the client is not the owner, the
2374 * owner will get notified if no more clients are in the tunnel and the client
2375 * get removed from the tunnel's list.
2377 * @param cls closure (client that is disconnecting)
2378 * @param key the hash of the local tunnel id (used to access the hashmap)
2379 * @param value the value stored at the key (tunnel to destroy)
2381 * @return GNUNET_OK, keep iterating.
2384 tunnel_destroy_iterator (void *cls,
2385 const struct GNUNET_HashCode * key,
2388 struct MeshTunnel *t = value;
2389 struct MeshClient *c = cls;
2391 send_client_tunnel_destroy (t);
2394 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %u is destination.\n", c->id);
2395 client_delete_tunnel (c, t);
2396 tunnel_destroy_empty (t);
2399 tunnel_send_destroy (t);
2401 t->destroy = GNUNET_YES;
2408 * Timeout function, destroys tunnel if called
2410 * @param cls Closure (tunnel to destroy).
2411 * @param tc TaskContext
2414 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2416 struct MeshTunnel *t = cls;
2417 struct GNUNET_PeerIdentity id;
2419 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2420 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2422 GNUNET_PEER_resolve(t->id.oid, &id);
2423 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2424 "Tunnel %s [%X] timed out. Destroying.\n",
2425 GNUNET_i2s(&id), t->id.tid);
2426 send_client_tunnel_destroy (t);
2432 * Resets the tunnel timeout. Starts it if no timeout was running.
2434 * @param t Tunnel whose timeout to reset.
2436 * TODO use heap to improve efficiency of scheduler.
2439 tunnel_reset_timeout (struct MeshTunnel *t)
2441 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
2443 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2444 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2445 t->maintenance_task =
2446 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2447 (refresh_path_time, 4), &tunnel_timeout, t);
2451 /******************************************************************************/
2452 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2453 /******************************************************************************/
2456 * Function to send a create path packet to a peer.
2458 * @param cls closure
2459 * @param size number of bytes available in buf
2460 * @param buf where the callee should write the message
2461 * @return number of bytes written to buf
2464 send_core_path_create (void *cls, size_t size, void *buf)
2466 struct MeshTunnel *t = cls;
2467 struct GNUNET_MESH_ManipulatePath *msg;
2468 struct GNUNET_PeerIdentity *peer_ptr;
2469 struct MeshPeerPath *p = t->path;
2474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
2476 sizeof (struct GNUNET_MESH_ManipulatePath) +
2477 p->length * sizeof (struct GNUNET_PeerIdentity);
2479 if (size < size_needed || NULL == buf)
2484 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2485 msg->header.size = htons (size_needed);
2486 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2487 msg->tid = ntohl (t->id.tid);
2490 if (GNUNET_YES == t->nobuffer)
2491 opt |= MESH_TUNNEL_OPT_NOBUFFER;
2492 msg->opt = htonl(opt);
2495 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2496 for (i = 0; i < p->length; i++)
2498 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2501 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2502 "CREATE PATH (%u bytes long) sent!\n", size_needed);
2508 * Creates a path ack message in buf and frees all unused resources.
2510 * @param cls closure (MeshTransmissionDescriptor)
2511 * @param size number of bytes available in buf
2512 * @param buf where the callee should write the message
2513 * @return number of bytes written to buf
2516 send_core_path_ack (void *cls, size_t size, void *buf)
2518 struct MeshTransmissionDescriptor *info = cls;
2519 struct GNUNET_MESH_PathACK *msg = buf;
2521 GNUNET_assert (NULL != info);
2522 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2527 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2528 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2529 GNUNET_PEER_resolve (info->origin->oid, &msg->oid);
2530 msg->tid = htonl (info->origin->tid);
2531 msg->peer_id = my_full_id;
2534 /* TODO add signature */
2536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
2537 return sizeof (struct GNUNET_MESH_PathACK);
2542 * Free a transmission that was already queued with all resources
2543 * associated to the request.
2545 * @param queue Queue handler to cancel.
2546 * @param clear_cls Is it necessary to free associated cls?
2549 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
2551 struct MeshTransmissionDescriptor *dd;
2552 // unsigned int max;
2554 if (GNUNET_YES == clear_cls)
2556 switch (queue->type)
2558 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2559 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
2560 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
2562 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2563 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2564 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2565 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2566 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2568 " prebuilt message\n");
2569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2571 GNUNET_MESH_DEBUG_M2S(queue->type));
2573 GNUNET_free (dd->data);
2575 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
2580 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2581 " type %s unknown!\n",
2582 GNUNET_MESH_DEBUG_M2S(queue->type));
2584 GNUNET_free_non_null (queue->cls);
2586 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
2587 queue->peer->queue_tail,
2590 /* Delete from child_fc in the appropiate tunnel */
2591 // max = queue->tunnel->fwd_queue_max;
2592 // GNUNET_PEER_resolve (queue->peer->id, &id);
2593 // if (NULL != cinfo)
2595 // for (i = 0; i < cinfo->send_buffer_n; i++)
2597 // i2 = (cinfo->send_buffer_start + i) % max;
2598 // if (cinfo->send_buffer[i2] == queue)
2600 // /* Found corresponding entry in the send_buffer. Move all others back. */
2604 // for (j = i, j2 = 0, j3 = 0; j < cinfo->send_buffer_n - 1; j++)
2606 // j2 = (cinfo->send_buffer_start + j) % max;
2607 // j3 = (cinfo->send_buffer_start + j + 1) % max;
2608 // cinfo->send_buffer[j2] = cinfo->send_buffer[j3];
2611 // cinfo->send_buffer[j3] = NULL;
2612 // cinfo->send_buffer_n--;
2617 GNUNET_free (queue);
2622 * @brief Get the next transmittable message from the queue.
2624 * This will be the head, except in the case of being a data packet
2625 * not allowed by the destination peer.
2627 * @param peer Destination peer.
2629 * @return The next viable MeshPeerQueue element to send to that peer.
2630 * NULL when there are no transmittable messages.
2632 struct MeshPeerQueue *
2633 queue_get_next (const struct MeshPeerInfo *peer)
2635 struct MeshPeerQueue *q;
2637 struct MeshTransmissionDescriptor *info;
2638 // struct GNUNET_MESH_Unicast *ucast;
2639 // struct GNUNET_MESH_ToOrigin *to_orig;
2640 struct GNUNET_PeerIdentity id;
2642 // uint32_t ack; FIXME
2644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
2645 for (q = peer->queue_head; NULL != q; q = q->next)
2649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2651 GNUNET_MESH_DEBUG_M2S(q->type));
2654 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2655 // ucast = (struct GNUNET_MESH_Unicast *) info->mesh_data->data;
2656 // pid = ntohl (ucast->pid);
2657 GNUNET_PEER_resolve (info->peer->id, &id);
2658 // ack = cinfo->fwd_ack;
2660 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2661 // to_orig = (struct GNUNET_MESH_ToOrigin *) info->mesh_data->data;
2662 // pid = ntohl (to_orig->pid);
2663 // ack = t->bck_ack;
2666 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2670 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2671 // "********* ACK: %u, PID: %u\n",
2673 // if (GNUNET_NO == GMC_is_pid_bigger(pid, ack))
2675 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2676 // "********* OK!\n");
2681 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2682 // "********* NEXT!\n");
2685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2686 "********* nothing found\n");
2692 queue_send (void *cls, size_t size, void *buf)
2694 struct MeshPeerInfo *peer = cls;
2695 struct GNUNET_MessageHeader *msg;
2696 struct MeshPeerQueue *queue;
2697 struct MeshTunnel *t;
2698 struct GNUNET_PeerIdentity dst_id;
2699 struct MeshFlowControl *fc;
2702 peer->core_transmit = NULL;
2704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
2705 queue = queue_get_next (peer);
2707 /* Queue has no internal mesh traffic nor sendable payload */
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
2711 if (NULL == peer->queue_head)
2712 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
2715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
2717 GNUNET_PEER_resolve (peer->id, &dst_id);
2718 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2719 "********* towards %s\n",
2720 GNUNET_i2s(&dst_id));
2721 /* Check if buffer size is enough for the message */
2722 if (queue->size > size)
2724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2725 "********* not enough room, reissue\n");
2726 peer->core_transmit =
2727 GNUNET_CORE_notify_transmit_ready (core_handle,
2730 GNUNET_TIME_UNIT_FOREVER_REL,
2737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
2740 GNUNET_assert (0 < t->pending_messages);
2741 t->pending_messages--;
2742 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type)
2744 t->next_fc.queue_n--;
2745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2746 "********* unicast: t->q (%u/%u)\n",
2747 t->next_fc.queue_n, t->queue_max);
2749 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type)
2751 t->prev_fc.queue_n--;
2752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2753 "********* to orig: t->q (%u/%u)\n",
2754 t->prev_fc.queue_n, t->queue_max);
2758 switch (queue->type)
2761 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2762 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2763 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
2764 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
2765 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2766 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2768 "********* raw: %s\n",
2769 GNUNET_MESH_DEBUG_M2S (queue->type));
2771 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2772 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2773 data_size = send_core_data_raw (queue->cls, size, buf);
2774 msg = (struct GNUNET_MessageHeader *) buf;
2775 switch (ntohs (msg->type)) // Type of preconstructed message
2777 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2778 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
2780 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2781 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
2787 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
2789 data_size = send_core_path_create (queue->cls, size, buf);
2791 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2792 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
2793 data_size = send_core_path_ack (queue->cls, size, buf);
2797 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2798 "********* type unknown: %u\n",
2802 switch (queue->type)
2804 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2805 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2806 // if (cinfo->send_buffer[cinfo->send_buffer_start] != queue)
2808 // GNUNET_break (0);
2809 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2810 // "at pos %u (%p) != %p\n",
2811 // cinfo->send_buffer_start,
2812 // cinfo->send_buffer[cinfo->send_buffer_start],
2815 // if (cinfo->send_buffer_n > 0)
2817 // cinfo->send_buffer[cinfo->send_buffer_start] = NULL;
2818 // cinfo->send_buffer_n--;
2819 // cinfo->send_buffer_start++;
2820 // cinfo->send_buffer_start %= t->fwd_queue_max;
2824 // GNUNET_break (0);
2831 /* Free queue, but cls was freed by send_core_* */
2832 queue_destroy (queue, GNUNET_NO);
2834 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
2836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
2840 /* If more data in queue, send next */
2841 queue = queue_get_next (peer);
2844 struct GNUNET_PeerIdentity id;
2846 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
2847 GNUNET_PEER_resolve (peer->id, &id);
2848 peer->core_transmit =
2849 GNUNET_CORE_notify_transmit_ready(core_handle,
2852 GNUNET_TIME_UNIT_FOREVER_REL,
2860 if (NULL != peer->queue_head)
2862 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2863 "********* %s stalled\n",
2864 GNUNET_i2s(&my_full_id));
2865 if (peer->id == t->next_hop)
2869 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
2872 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
2883 * @brief Queue and pass message to core when possible.
2885 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
2886 * accounts for it. In case the queue is full, the message is dropped and
2889 * Otherwise, message is treated as internal and allowed to go regardless of
2892 * @param cls Closure (@c type dependant). It will be used by queue_send to
2893 * build the message to be sent if not already prebuilt.
2894 * @param type Type of the message, 0 for a raw message.
2895 * @param size Size of the message.
2896 * @param dst Neighbor to send message to.
2897 * @param t Tunnel this message belongs to.
2900 queue_add (void *cls, uint16_t type, size_t size,
2901 struct MeshPeerInfo *dst, struct MeshTunnel *t)
2903 struct MeshPeerQueue *queue;
2904 struct GNUNET_PeerIdentity id;
2908 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2910 n = &t->next_fc.queue_n;
2912 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
2914 n = &t->prev_fc.queue_n;
2918 if (*n >= t->queue_max)
2921 GNUNET_STATISTICS_update(stats,
2922 "# messages dropped (buffer full)",
2924 return; // Drop message
2928 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
2934 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
2935 if (NULL == dst->core_transmit)
2937 GNUNET_PEER_resolve (dst->id, &id);
2938 dst->core_transmit =
2939 GNUNET_CORE_notify_transmit_ready (core_handle,
2942 GNUNET_TIME_UNIT_FOREVER_REL,
2948 t->pending_messages++;
2952 /******************************************************************************/
2953 /******************** MESH NETWORK HANDLERS **************************/
2954 /******************************************************************************/
2958 * Core handler for path creation
2960 * @param cls closure
2961 * @param message message
2962 * @param peer peer identity this notification is about
2964 * @return GNUNET_OK to keep the connection open,
2965 * GNUNET_SYSERR to close it (signal serious error)
2968 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2969 const struct GNUNET_MessageHeader *message)
2971 unsigned int own_pos;
2974 MESH_TunnelNumber tid;
2975 struct GNUNET_MESH_ManipulatePath *msg;
2976 struct GNUNET_PeerIdentity *pi;
2977 struct GNUNET_HashCode hash;
2978 struct MeshPeerPath *path;
2979 struct MeshPeerInfo *dest_peer_info;
2980 struct MeshPeerInfo *orig_peer_info;
2981 struct MeshTunnel *t;
2983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2984 "Received a path create msg [%s]\n",
2985 GNUNET_i2s (&my_full_id));
2986 size = ntohs (message->size);
2987 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2989 GNUNET_break_op (0);
2993 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2994 if (size % sizeof (struct GNUNET_PeerIdentity))
2996 GNUNET_break_op (0);
2999 size /= sizeof (struct GNUNET_PeerIdentity);
3002 GNUNET_break_op (0);
3005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3006 msg = (struct GNUNET_MESH_ManipulatePath *) message;
3008 tid = ntohl (msg->tid);
3009 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3010 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3011 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
3012 t = tunnel_get (pi, tid);
3013 if (NULL == t) // FIXME only for INCOMING tunnels?
3017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3018 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3021 // FIXME notify failure
3024 opt = ntohl (msg->opt);
3025 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
3027 t->nobuffer = GNUNET_YES;
3028 t->prev_fc.last_ack_sent = t->prev_fc.last_pid_recv + 1;
3030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3032 if (GNUNET_YES == t->nobuffer)
3037 // FIXME only assign a local tid if a local client is interested (on demand)
3038 while (NULL != tunnel_get_incoming (next_local_tid))
3039 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3040 t->local_tid_dest = next_local_tid++;
3041 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3044 tunnel_reset_timeout (t);
3045 GMC_hash32 (t->local_tid_dest, &hash);
3047 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
3048 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
3056 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3057 if (NULL == dest_peer_info)
3059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3060 " Creating PeerInfo for destination.\n");
3061 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3062 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3063 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3065 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3067 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3068 if (NULL == orig_peer_info)
3070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3071 " Creating PeerInfo for origin.\n");
3072 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3073 orig_peer_info->id = GNUNET_PEER_intern (pi);
3074 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3075 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3078 path = path_new (size);
3080 for (i = 0; i < size; i++)
3082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3083 GNUNET_i2s (&pi[i]));
3084 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3085 if (path->peers[i] == myid)
3088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3091 /* cannot be self, must be 'not found' */
3092 /* create path: self not found in path through self */
3093 GNUNET_break_op (0);
3094 path_destroy (path);
3098 path_add_to_peers (path, GNUNET_NO);
3099 t->prev_hop = path->peers[own_pos - 1];
3100 GNUNET_PEER_change_rc (t->prev_hop, 1);
3101 if (own_pos == size - 1)
3103 /* It is for us! Send ack. */
3104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3105 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3111 struct MeshPeerPath *path2;
3113 t->next_hop = path->peers[own_pos + 1];
3114 GNUNET_PEER_change_rc(t->next_hop, 1);
3116 /* It's for somebody else! Retransmit. */
3117 path2 = path_duplicate (path);
3118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3119 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3120 path2 = path_duplicate (path);
3121 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
3122 send_create_path (dest_peer_info, path, t);
3129 * Core handler for path destruction
3131 * @param cls closure
3132 * @param message message
3133 * @param peer peer identity this notification is about
3135 * @return GNUNET_OK to keep the connection open,
3136 * GNUNET_SYSERR to close it (signal serious error)
3139 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3140 const struct GNUNET_MessageHeader *message)
3142 struct GNUNET_MESH_ManipulatePath *msg;
3143 struct GNUNET_PeerIdentity *pi;
3144 struct MeshPeerPath *path;
3145 struct MeshTunnel *t;
3146 unsigned int own_pos;
3150 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3151 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
3152 size = ntohs (message->size);
3153 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
3155 GNUNET_break_op (0);
3159 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
3160 if (size % sizeof (struct GNUNET_PeerIdentity))
3162 GNUNET_break_op (0);
3165 size /= sizeof (struct GNUNET_PeerIdentity);
3168 GNUNET_break_op (0);
3171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3173 msg = (struct GNUNET_MESH_ManipulatePath *) message;
3174 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3176 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
3178 t = tunnel_get (pi, ntohl (msg->tid));
3181 /* TODO notify back: we don't know this tunnel */
3182 GNUNET_break_op (0);
3185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3186 path = path_new (size);
3188 for (i = 0; i < size; i++)
3190 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3191 GNUNET_i2s (&pi[i]));
3192 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3193 if (path->peers[i] == myid)
3196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3197 if (own_pos < path->length - 1)
3198 send_prebuilt_message (message, path->peers[own_pos + 1], t);
3200 send_client_tunnel_destroy (t);
3202 // tunnel_delete_peer (t, path->peers[path->length - 1]); FIXME
3203 path_destroy (path);
3209 * Core handler for notifications of broken paths
3211 * @param cls closure
3212 * @param message message
3213 * @param peer peer identity this notification is about
3215 * @return GNUNET_OK to keep the connection open,
3216 * GNUNET_SYSERR to close it (signal serious error)
3219 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3220 const struct GNUNET_MessageHeader *message)
3222 struct GNUNET_MESH_PathBroken *msg;
3223 struct MeshTunnel *t;
3225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3226 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3227 msg = (struct GNUNET_MESH_PathBroken *) message;
3228 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3229 GNUNET_i2s (&msg->peer1));
3230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3231 GNUNET_i2s (&msg->peer2));
3232 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3235 GNUNET_break_op (0);
3238 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3239 GNUNET_PEER_search (&msg->peer2));
3246 * Core handler for tunnel destruction
3248 * @param cls closure
3249 * @param message message
3250 * @param peer peer identity this notification is about
3252 * @return GNUNET_OK to keep the connection open,
3253 * GNUNET_SYSERR to close it (signal serious error)
3256 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3257 const struct GNUNET_MessageHeader *message)
3259 struct GNUNET_MESH_TunnelDestroy *msg;
3260 struct MeshTunnel *t;
3262 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3264 "Got a TUNNEL DESTROY packet from %s\n",
3266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3267 " for tunnel %s [%u]\n",
3268 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3269 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3270 /* Check signature */
3273 /* Probably already got the message from another path,
3274 * destroyed the tunnel and retransmitted to children.
3277 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3281 // TODO check owner's signature
3282 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3284 /* Tunnel was incoming, notify clients */
3285 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3286 t->local_tid, t->local_tid_dest);
3287 send_client_tunnel_destroy (t);
3289 tunnel_send_destroy (t);
3290 t->destroy = GNUNET_YES;
3291 // TODO: add timeout to destroy the tunnel anyway
3297 * Core handler for mesh network traffic going from the origin to a peer
3299 * @param cls closure
3300 * @param peer peer identity this notification is about
3301 * @param message message
3302 * @return GNUNET_OK to keep the connection open,
3303 * GNUNET_SYSERR to close it (signal serious error)
3306 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3307 const struct GNUNET_MessageHeader *message)
3309 struct GNUNET_MESH_Unicast *msg;
3310 struct MeshTunnel *t;
3315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3318 size = ntohs (message->size);
3320 sizeof (struct GNUNET_MESH_Unicast) +
3321 sizeof (struct GNUNET_MessageHeader))
3326 msg = (struct GNUNET_MESH_Unicast *) message;
3327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3328 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3330 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3333 /* TODO notify back: we don't know this tunnel */
3334 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3335 GNUNET_break_op (0);
3338 pid = ntohl (msg->pid);
3339 if (t->prev_fc.last_pid_recv == pid)
3341 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
3342 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3343 " Already seen pid %u, DROPPING!\n", pid);
3348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3349 " pid %u not seen yet, forwarding\n", pid);
3352 t->prev_fc.last_pid_recv = pid;
3354 if (GMC_is_pid_bigger (pid, t->prev_fc.last_ack_sent))
3356 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3357 GNUNET_break_op (0);
3358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3359 "Received PID %u, ACK %u\n",
3360 pid, t->prev_fc.last_ack_sent);
3364 tunnel_reset_timeout (t);
3365 if (t->dest == myid)
3367 if (NULL == t->client)
3372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3373 " it's for us! sending to clients...\n");
3374 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
3375 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
3376 message, GNUNET_NO);
3377 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3380 if (0 == t->next_hop)
3385 ttl = ntohl (msg->ttl);
3386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
3389 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
3390 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
3391 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3394 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3395 " not for us, retransmitting...\n");
3397 if (GNUNET_YES == t->nobuffer &&
3398 GNUNET_YES == GMC_is_pid_bigger (pid, t->next_fc.last_ack_recv))
3400 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3401 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " %u > %u\n",
3402 pid, t->next_fc.last_ack_recv);
3403 GNUNET_break_op (0);
3406 send_prebuilt_message (message, t->next_hop, t);
3407 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
3413 * Core handler for mesh network traffic toward the owner of a tunnel
3415 * @param cls closure
3416 * @param message message
3417 * @param peer peer identity this notification is about
3419 * @return GNUNET_OK to keep the connection open,
3420 * GNUNET_SYSERR to close it (signal serious error)
3423 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3424 const struct GNUNET_MessageHeader *message)
3426 struct GNUNET_MESH_ToOrigin *msg;
3427 struct MeshPeerInfo *peer_info;
3428 struct MeshTunnel *t;
3432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
3434 size = ntohs (message->size);
3435 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3436 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3438 GNUNET_break_op (0);
3441 msg = (struct GNUNET_MESH_ToOrigin *) message;
3442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3443 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3444 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3445 pid = ntohl (msg->pid);
3449 /* TODO notify that we dont know this tunnel (whom)? */
3450 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3452 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
3453 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3458 if (t->next_fc.last_pid_recv == pid)
3460 /* already seen this packet, drop */
3461 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
3462 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3463 " Already seen pid %u, DROPPING!\n", pid);
3464 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3469 " pid %u not seen yet, forwarding\n", pid);
3470 t->next_fc.last_pid_recv = pid;
3472 if (NULL != t->owner)
3475 struct GNUNET_MESH_ToOrigin *copy;
3477 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3478 " it's for us! sending to clients...\n");
3479 /* TODO signature verification */
3480 memcpy (cbuf, message, size);
3481 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3482 copy->tid = htonl (t->local_tid);
3483 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
3484 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3485 ©->header, GNUNET_NO);
3486 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
3489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3490 " not for us, retransmitting...\n");
3492 peer_info = peer_get (&msg->oid);
3493 if (NULL == peer_info)
3495 /* unknown origin of tunnel */
3499 if (0 == t->prev_hop) /* No owner AND no prev hop */
3501 if (GNUNET_YES == t->destroy)
3503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3504 "to orig received on a dying tunnel %s [%X]\n",
3505 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3508 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3509 "unknown to origin at %s\n",
3510 GNUNET_i2s (&my_full_id));
3511 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3514 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3515 "for tunnel %s [%X]\n",
3516 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3519 send_prebuilt_message (message, t->prev_hop, t);
3520 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
3527 * Core handler for mesh network traffic point-to-point acks.
3529 * @param cls closure
3530 * @param message message
3531 * @param peer peer identity this notification is about
3533 * @return GNUNET_OK to keep the connection open,
3534 * GNUNET_SYSERR to close it (signal serious error)
3537 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3538 const struct GNUNET_MessageHeader *message)
3540 struct GNUNET_MESH_ACK *msg;
3541 struct MeshTunnel *t;
3544 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
3546 msg = (struct GNUNET_MESH_ACK *) message;
3548 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3552 /* TODO notify that we dont know this tunnel (whom)? */
3553 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
3556 ack = ntohl (msg->pid);
3557 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
3559 /* Is this a forward or backward ACK? */
3560 if (t->prev_hop != GNUNET_PEER_search (peer))
3563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
3564 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task &&
3565 GMC_is_pid_bigger (ack, t->next_fc.last_ack_recv))
3567 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3568 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3569 t->next_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3571 t->next_fc.last_ack_recv = ack;
3572 peer_unlock_queue (t->next_hop);
3573 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3577 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
3578 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task &&
3579 GMC_is_pid_bigger (ack, t->prev_fc.last_ack_recv))
3581 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3582 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3583 t->prev_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3585 t->prev_fc.last_ack_recv = ack;
3586 peer_unlock_queue (t->prev_hop);
3587 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3594 * Core handler for mesh network traffic point-to-point ack polls.
3596 * @param cls closure
3597 * @param message message
3598 * @param peer peer identity this notification is about
3600 * @return GNUNET_OK to keep the connection open,
3601 * GNUNET_SYSERR to close it (signal serious error)
3604 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
3605 const struct GNUNET_MessageHeader *message)
3607 struct GNUNET_MESH_Poll *msg;
3608 struct MeshTunnel *t;
3610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
3613 msg = (struct GNUNET_MESH_Poll *) message;
3615 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3619 /* TODO notify that we dont know this tunnel (whom)? */
3620 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
3621 GNUNET_break_op (0);
3625 /* Is this a forward or backward ACK? */
3626 if (t->prev_hop != GNUNET_PEER_search(peer))
3628 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
3629 /* FIXME cinfo->bck_ack = cinfo->fwd_pid; // mark as ready to send */
3630 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
3635 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3642 * Core handler for path ACKs
3644 * @param cls closure
3645 * @param message message
3646 * @param peer peer identity this notification is about
3648 * @return GNUNET_OK to keep the connection open,
3649 * GNUNET_SYSERR to close it (signal serious error)
3652 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3653 const struct GNUNET_MessageHeader *message)
3655 struct GNUNET_MESH_PathACK *msg;
3656 struct MeshPeerInfo *peer_info;
3657 struct MeshPeerPath *p;
3658 struct MeshTunnel *t;
3660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3661 GNUNET_i2s (&my_full_id));
3662 msg = (struct GNUNET_MESH_PathACK *) message;
3663 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3666 /* TODO notify that we don't know the tunnel */
3667 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3668 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3669 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3673 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3675 peer_info = peer_get (&msg->peer_id);
3676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3677 GNUNET_i2s (&msg->peer_id));
3678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3681 /* Add path to peers? */
3685 path_add_to_peers (p, GNUNET_YES);
3692 /* Message for us? */
3693 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3696 if (NULL == t->owner)
3698 GNUNET_break_op (0);
3701 if (NULL != peer_info->dhtget)
3703 GNUNET_DHT_get_stop (peer_info->dhtget);
3704 peer_info->dhtget = NULL;
3709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3710 " not for us, retransmitting...\n");
3711 peer_info = peer_get (&msg->oid);
3712 send_prebuilt_message (message, t->prev_hop, t);
3718 * Core handler for mesh keepalives.
3720 * @param cls closure
3721 * @param message message
3722 * @param peer peer identity this notification is about
3723 * @return GNUNET_OK to keep the connection open,
3724 * GNUNET_SYSERR to close it (signal serious error)
3726 * TODO: Check who we got this from, to validate route.
3729 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
3730 const struct GNUNET_MessageHeader *message)
3732 struct GNUNET_MESH_TunnelKeepAlive *msg;
3733 struct MeshTunnel *t;
3735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
3738 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
3739 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3743 /* TODO notify that we dont know that tunnel */
3744 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
3749 tunnel_reset_timeout (t);
3751 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
3752 send_prebuilt_message (message, t->next_hop, t);
3759 * Functions to handle messages from core
3761 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3762 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3763 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3764 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3765 sizeof (struct GNUNET_MESH_PathBroken)},
3766 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
3767 sizeof (struct GNUNET_MESH_TunnelDestroy)},
3768 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3769 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
3770 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
3771 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3772 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
3773 sizeof (struct GNUNET_MESH_ACK)},
3774 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
3775 sizeof (struct GNUNET_MESH_Poll)},
3776 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3777 sizeof (struct GNUNET_MESH_PathACK)},
3783 /******************************************************************************/
3784 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3785 /******************************************************************************/
3790 * notify_client_connection_failure: notify a client that the connection to the
3791 * requested remote peer is not possible (for instance, no route found)
3792 * Function called when the socket is ready to queue more data. "buf" will be
3793 * NULL and "size" zero if the socket was closed for writing in the meantime.
3795 * @param cls closure
3796 * @param size number of bytes available in buf
3797 * @param buf where the callee should write the message
3798 * @return number of bytes written to buf
3801 notify_client_connection_failure (void *cls, size_t size, void *buf)
3804 struct MeshPeerInfo *peer_info;
3805 struct GNUNET_MESH_PeerControl *msg;
3806 struct GNUNET_PeerIdentity id;
3808 if (0 == size && NULL == buf)
3810 // TODO retry? cancel?
3814 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3815 peer_info = (struct MeshPeerInfo *) cls;
3816 msg = (struct GNUNET_MESH_PeerControl *) buf;
3817 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3818 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3819 // msg->tunnel_id = htonl(peer_info->t->tid);
3820 GNUNET_PEER_resolve (peer_info->id, &id);
3821 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3829 * Send keepalive packets for a tunnel.
3831 * @param cls Closure (tunnel for which to send the keepalive).
3832 * @param tc Notification context.
3835 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3837 struct MeshTunnel *t = cls;
3838 struct GNUNET_MESH_TunnelKeepAlive *msg;
3839 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
3842 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3843 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3844 NULL == t->owner || 0 == t->local_tid || 0 != t->prev_hop)
3849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3850 "sending keepalive for tunnel %d\n", t->id.tid);
3852 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
3853 msg->header.size = htons (size);
3854 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3855 msg->oid = my_full_id;
3856 msg->tid = htonl (t->id.tid);
3857 send_prebuilt_message (&msg->header, t->next_hop, t);
3859 t->maintenance_task =
3860 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3865 * Function to process paths received for a new peer addition. The recorded
3866 * paths form the initial tunnel, which can be optimized later.
3867 * Called on each result obtained for the DHT search.
3869 * @param cls closure
3870 * @param exp when will this value expire
3871 * @param key key of the result
3872 * @param get_path path of the get request
3873 * @param get_path_length lenght of get_path
3874 * @param put_path path of the put request
3875 * @param put_path_length length of the put_path
3876 * @param type type of the result
3877 * @param size number of bytes in data
3878 * @param data pointer to the result data
3880 * TODO: re-issue the request after certain time? cancel after X results?
3883 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3884 const struct GNUNET_HashCode * key,
3885 const struct GNUNET_PeerIdentity *get_path,
3886 unsigned int get_path_length,
3887 const struct GNUNET_PeerIdentity *put_path,
3888 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3889 size_t size, const void *data)
3891 struct MeshPeerInfo *peer = cls;
3892 struct MeshPeerPath *p;
3893 struct GNUNET_PeerIdentity pi;
3896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
3897 GNUNET_PEER_resolve (peer->id, &pi);
3898 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
3900 p = path_build_from_dht (get_path, get_path_length,
3901 put_path, put_path_length);
3902 path_add_to_peers (p, GNUNET_NO);
3904 for (i = 0; i < peer->ntunnels; i++)
3906 peer_connect (peer, peer->tunnels[i]); // FIXME add if
3913 /******************************************************************************/
3914 /********************* MESH LOCAL HANDLES **************************/
3915 /******************************************************************************/
3919 * Handler for client disconnection
3921 * @param cls closure
3922 * @param client identification of the client; NULL
3923 * for the last call when the server is destroyed
3926 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3928 struct MeshClient *c;
3929 struct MeshClient *next;
3931 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
3934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
3941 if (c->handle != client)
3943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
3947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
3949 GNUNET_SERVER_client_drop (c->handle);
3950 c->shutting_down = GNUNET_YES;
3951 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3952 &tunnel_destroy_iterator, c);
3953 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3954 &tunnel_destroy_iterator, c);
3955 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3956 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3958 if (NULL != c->types)
3959 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3961 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
3962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
3964 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
3967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
3973 * Handler for new clients
3975 * @param cls closure
3976 * @param client identification of the client
3977 * @param message the actual message, which includes messages the client wants
3980 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3981 const struct GNUNET_MessageHeader *message)
3983 struct GNUNET_MESH_ClientConnect *cc_msg;
3984 struct MeshClient *c;
3990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
3992 /* Check data sanity */
3993 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3994 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3995 ntypes = ntohs (cc_msg->types);
3996 if (size != ntypes * sizeof (uint16_t))
3999 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4003 /* Create new client structure */
4004 c = GNUNET_malloc (sizeof (struct MeshClient));
4005 c->id = next_client_id++; // overflow not important: just for debug
4006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
4007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u types\n", ntypes);
4009 GNUNET_SERVER_client_keep (client);
4013 struct GNUNET_HashCode hc;
4015 t = (uint16_t *) &cc_msg[1];
4016 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes, GNUNET_NO);
4017 for (i = 0; i < ntypes; i++)
4020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
4021 GMC_hash32 ((uint32_t) u16, &hc);
4023 /* store in clients hashmap */
4024 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
4025 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4026 /* store in global hashmap */
4027 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
4028 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4032 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4033 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4034 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4035 GNUNET_SERVER_notification_context_add (nc, client);
4036 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
4038 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
4044 * Handler for requests of new tunnels
4046 * @param cls Closure.
4047 * @param client Identification of the client.
4048 * @param message The actual message.
4051 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
4052 const struct GNUNET_MessageHeader *message)
4054 struct GNUNET_MESH_TunnelMessage *t_msg;
4055 struct MeshPeerInfo *peer_info;
4056 struct MeshTunnel *t;
4057 struct MeshClient *c;
4058 MESH_TunnelNumber tid;
4060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
4062 /* Sanity check for client registration */
4063 if (NULL == (c = client_get (client)))
4066 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4069 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4071 /* Message sanity check */
4072 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4075 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4079 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4081 GNUNET_i2s (&t_msg->peer));
4082 /* Sanity check for tunnel numbering */
4083 tid = ntohl (t_msg->tunnel_id);
4084 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4087 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4090 /* Sanity check for duplicate tunnel IDs */
4091 if (NULL != tunnel_get_by_local_id (c, tid))
4094 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4098 while (NULL != tunnel_get_by_pi (myid, next_tid))
4099 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4100 t = tunnel_new (myid, next_tid, c, tid);
4101 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4105 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
4109 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
4111 peer_info = peer_get (&t_msg->peer);
4112 GNUNET_array_append (peer_info->tunnels, peer_info->ntunnels, t);
4113 peer_connect (peer_info, t);
4114 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4120 * Handler for requests of deleting tunnels
4122 * @param cls closure
4123 * @param client identification of the client
4124 * @param message the actual message
4127 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4128 const struct GNUNET_MessageHeader *message)
4130 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4131 struct MeshClient *c;
4132 struct MeshTunnel *t;
4133 MESH_TunnelNumber tid;
4135 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4136 "Got a DESTROY TUNNEL from client!\n");
4138 /* Sanity check for client registration */
4139 if (NULL == (c = client_get (client)))
4142 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4147 /* Message sanity check */
4148 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4151 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4155 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4157 /* Retrieve tunnel */
4158 tid = ntohl (tunnel_msg->tunnel_id);
4159 t = tunnel_get_by_local_id(c, tid);
4162 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4164 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4169 tunnel_destroy_empty (t);
4170 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4173 send_client_tunnel_destroy (t);
4174 client_delete_tunnel (c, t);
4176 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4178 tunnel_send_destroy (t);
4179 peer_remove_tunnel (peer_get_short(t->dest), t);
4180 t->destroy = GNUNET_YES;
4181 /* The tunnel will be destroyed when the last message is transmitted. */
4182 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4188 * Handler for requests of seeting tunnel's buffering policy.
4190 * @param cls Closure (unused).
4191 * @param client Identification of the client.
4192 * @param message The actual message.
4195 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
4196 const struct GNUNET_MessageHeader *message)
4198 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4199 struct MeshClient *c;
4200 struct MeshTunnel *t;
4201 MESH_TunnelNumber tid;
4203 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4204 "Got a BUFFER request from client!\n");
4206 /* Sanity check for client registration */
4207 if (NULL == (c = client_get (client)))
4210 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4215 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4217 /* Retrieve tunnel */
4218 tid = ntohl (tunnel_msg->tunnel_id);
4219 t = tunnel_get_by_local_id(c, tid);
4222 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4224 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4228 switch (ntohs(message->type))
4230 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
4231 t->nobuffer = GNUNET_NO;
4233 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
4234 t->nobuffer = GNUNET_YES;
4240 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4245 * Handler for client traffic directed to one peer
4247 * @param cls closure
4248 * @param client identification of the client
4249 * @param message the actual message
4252 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4253 const struct GNUNET_MessageHeader *message)
4255 struct MeshClient *c;
4256 struct MeshTunnel *t;
4257 struct GNUNET_MESH_Unicast *data_msg;
4258 MESH_TunnelNumber tid;
4261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4262 "Got a unicast request from a client!\n");
4264 /* Sanity check for client registration */
4265 if (NULL == (c = client_get (client)))
4268 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4273 data_msg = (struct GNUNET_MESH_Unicast *) message;
4275 /* Sanity check for message size */
4276 size = ntohs (message->size);
4277 if (sizeof (struct GNUNET_MESH_Unicast) +
4278 sizeof (struct GNUNET_MessageHeader) > size)
4281 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4285 /* Tunnel exists? */
4286 tid = ntohl (data_msg->tid);
4287 t = tunnel_get_by_local_id (c, tid);
4291 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4295 /* Is it a local tunnel? Then, does client own the tunnel? */
4296 if (t->owner->handle != client)
4299 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4303 /* PID should be as expected: client<->service communication */
4304 if (ntohl (data_msg->pid) != t->prev_fc.last_pid_recv + 1)
4307 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4308 "Unicast PID, expected %u, got %u\n",
4309 t->prev_fc.last_pid_recv + 1, ntohl (data_msg->pid));
4310 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4314 /* Ok, everything is correct, send the message
4315 * (pretend we got it from a mesh peer)
4318 /* Work around const limitation */
4319 char buf[ntohs (message->size)] GNUNET_ALIGN;
4320 struct GNUNET_MESH_Unicast *copy;
4322 copy = (struct GNUNET_MESH_Unicast *) buf;
4323 memcpy (buf, data_msg, size);
4324 copy->oid = my_full_id;
4325 copy->tid = htonl (t->id.tid);
4326 copy->ttl = htonl (default_ttl);
4327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4328 " calling generic handler...\n");
4329 handle_mesh_data_unicast (NULL, &my_full_id, ©->header);
4331 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4332 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4339 * Handler for client traffic directed to the origin
4341 * @param cls closure
4342 * @param client identification of the client
4343 * @param message the actual message
4346 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4347 const struct GNUNET_MessageHeader *message)
4349 struct GNUNET_MESH_ToOrigin *data_msg;
4350 struct MeshFlowControl *fc;
4351 struct MeshClient *c;
4352 struct MeshTunnel *t;
4353 MESH_TunnelNumber tid;
4356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4357 "Got a ToOrigin request from a client!\n");
4358 /* Sanity check for client registration */
4359 if (NULL == (c = client_get (client)))
4362 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4367 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4369 /* Sanity check for message size */
4370 size = ntohs (message->size);
4371 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4372 sizeof (struct GNUNET_MessageHeader) > size)
4375 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4379 /* Tunnel exists? */
4380 tid = ntohl (data_msg->tid);
4381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4382 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4385 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4388 t = tunnel_get_by_local_id (c, tid);
4391 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4392 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4394 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4398 /* It should be sent by someone who has this as incoming tunnel. */
4402 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4406 /* PID should be as expected */
4408 if (ntohl (data_msg->pid) != fc->last_pid_recv + 1)
4411 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4412 "To Origin PID, expected %u, got %u\n",
4413 fc->last_pid_recv + 1,
4414 ntohl (data_msg->pid));
4415 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4418 fc->last_pid_recv++;
4420 /* Ok, everything is correct, send the message
4421 * (pretend we got it from a mesh peer)
4424 char buf[ntohs (message->size)] GNUNET_ALIGN;
4425 struct GNUNET_MESH_ToOrigin *copy;
4427 /* Work around 'const' limitation */
4428 memcpy (buf, data_msg, size);
4429 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4430 GNUNET_PEER_resolve (t->id.oid, ©->oid);
4431 copy->tid = htonl (t->id.tid);
4432 copy->ttl = htonl (default_ttl);
4433 copy->pid = htonl (t->prev_fc.last_pid_sent + 1);
4435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4436 " calling generic handler...\n");
4437 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header);
4439 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4446 * Handler for client's ACKs for payload traffic.
4448 * @param cls Closure (unused).
4449 * @param client Identification of the client.
4450 * @param message The actual message.
4453 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
4454 const struct GNUNET_MessageHeader *message)
4456 struct GNUNET_MESH_LocalAck *msg;
4457 struct MeshTunnel *t;
4458 struct MeshClient *c;
4459 MESH_TunnelNumber tid;
4462 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
4463 /* Sanity check for client registration */
4464 if (NULL == (c = client_get (client)))
4467 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4470 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4472 msg = (struct GNUNET_MESH_LocalAck *) message;
4474 /* Tunnel exists? */
4475 tid = ntohl (msg->tunnel_id);
4476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4477 t = tunnel_get_by_local_id (c, tid);
4481 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4482 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4483 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4487 ack = ntohl (msg->max_pid);
4488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
4490 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
4493 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
4494 t->prev_fc.last_ack_recv = ack;
4495 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4499 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
4500 t->next_fc.last_ack_recv = ack;
4501 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4504 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4512 * Iterator over all tunnels to send a monitoring client info about each tunnel.
4514 * @param cls Closure (client handle).
4515 * @param key Key (hashed tunnel ID, unused).
4516 * @param value Tunnel info.
4518 * @return GNUNET_YES, to keep iterating.
4521 monitor_all_tunnels_iterator (void *cls,
4522 const struct GNUNET_HashCode * key,
4525 struct GNUNET_SERVER_Client *client = cls;
4526 struct MeshTunnel *t = value;
4527 struct GNUNET_MESH_LocalMonitor *msg;
4529 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
4530 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
4531 msg->tunnel_id = htonl (t->id.tid);
4532 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4533 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
4534 GNUNET_PEER_resolve (t->dest, &msg->destination);
4536 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4537 "* sending info about tunnel %s [%u]\n",
4538 GNUNET_i2s (&msg->owner), t->id.tid);
4540 GNUNET_SERVER_notification_context_unicast (nc, client,
4541 &msg->header, GNUNET_NO);
4547 * Handler for client's MONITOR request.
4549 * @param cls Closure (unused).
4550 * @param client Identification of the client.
4551 * @param message The actual message.
4554 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
4555 const struct GNUNET_MessageHeader *message)
4557 struct MeshClient *c;
4559 /* Sanity check for client registration */
4560 if (NULL == (c = client_get (client)))
4563 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4567 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4568 "Received get tunnels request from client %u\n",
4570 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
4571 monitor_all_tunnels_iterator,
4573 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4574 "Get tunnels request from client %u completed\n",
4576 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4581 * Handler for client's MONITOR_TUNNEL request.
4583 * @param cls Closure (unused).
4584 * @param client Identification of the client.
4585 * @param message The actual message.
4588 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
4589 const struct GNUNET_MessageHeader *message)
4591 const struct GNUNET_MESH_LocalMonitor *msg;
4592 struct GNUNET_MESH_LocalMonitor *resp;
4593 struct MeshClient *c;
4594 struct MeshTunnel *t;
4596 /* Sanity check for client registration */
4597 if (NULL == (c = client_get (client)))
4600 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4604 msg = (struct GNUNET_MESH_LocalMonitor *) message;
4605 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4606 "Received tunnel info request from client %u for tunnel %s[%X]\n",
4609 ntohl (msg->tunnel_id));
4610 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
4613 /* We don't know the tunnel FIXME */
4614 struct GNUNET_MESH_LocalMonitor warn;
4617 GNUNET_SERVER_notification_context_unicast (nc, client,
4620 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4624 /* Initialize context */
4625 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
4627 GNUNET_PEER_resolve (t->dest, &resp->destination);
4628 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4629 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
4630 &resp->header, GNUNET_NO);
4633 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4634 "Monitor tunnel request from client %u completed\n",
4636 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4641 * Functions to handle messages from clients
4643 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4644 {&handle_local_new_client, NULL,
4645 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4646 {&handle_local_tunnel_create, NULL,
4647 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4648 sizeof (struct GNUNET_MESH_TunnelMessage)},
4649 {&handle_local_tunnel_destroy, NULL,
4650 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4651 sizeof (struct GNUNET_MESH_TunnelMessage)},
4652 {&handle_local_tunnel_buffer, NULL,
4653 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
4654 sizeof (struct GNUNET_MESH_TunnelMessage)},
4655 {&handle_local_tunnel_buffer, NULL,
4656 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
4657 sizeof (struct GNUNET_MESH_TunnelMessage)},
4658 {&handle_local_unicast, NULL,
4659 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4660 {&handle_local_to_origin, NULL,
4661 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4662 {&handle_local_ack, NULL,
4663 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
4664 sizeof (struct GNUNET_MESH_LocalAck)},
4665 {&handle_local_get_tunnels, NULL,
4666 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
4667 sizeof (struct GNUNET_MessageHeader)},
4668 {&handle_local_show_tunnel, NULL,
4669 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
4670 sizeof (struct GNUNET_MESH_LocalMonitor)},
4676 * To be called on core init/fail.
4678 * @param cls service closure
4679 * @param server handle to the server for this service
4680 * @param identity the public identity of this peer
4683 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4684 const struct GNUNET_PeerIdentity *identity)
4687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
4688 core_handle = server;
4689 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4692 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
4693 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4695 GNUNET_i2s (identity));
4696 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4698 GNUNET_i2s (&my_full_id));
4699 GNUNET_SCHEDULER_shutdown (); // Try gracefully
4701 GNUNET_abort(); // Try harder
4708 * Method called whenever a given peer connects.
4710 * @param cls closure
4711 * @param peer peer identity this notification is about
4714 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
4716 struct MeshPeerInfo *peer_info;
4717 struct MeshPeerPath *path;
4719 DEBUG_CONN ("Peer connected\n");
4720 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
4721 peer_info = peer_get (peer);
4722 if (myid == peer_info->id)
4724 DEBUG_CONN (" (self)\n");
4729 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
4731 path = path_new (2);
4732 path->peers[0] = myid;
4733 path->peers[1] = peer_info->id;
4734 GNUNET_PEER_change_rc (myid, 1);
4735 GNUNET_PEER_change_rc (peer_info->id, 1);
4736 peer_info_add_path (peer_info, path, GNUNET_YES);
4737 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
4743 * Method called whenever a peer disconnects.
4745 * @param cls closure
4746 * @param peer peer identity this notification is about
4749 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4751 struct MeshPeerInfo *pi;
4752 struct MeshPeerQueue *q;
4753 struct MeshPeerQueue *n;
4755 DEBUG_CONN ("Peer disconnected\n");
4756 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4766 /* TODO try to reroute this traffic instead */
4767 queue_destroy(q, GNUNET_YES);
4770 if (NULL != pi->core_transmit)
4772 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
4773 pi->core_transmit = NULL;
4775 peer_remove_path (pi, pi->id, myid);
4778 DEBUG_CONN (" (self)\n");
4780 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
4785 /******************************************************************************/
4786 /************************ MAIN FUNCTIONS ****************************/
4787 /******************************************************************************/
4790 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4792 * @param cls closure
4793 * @param key current key code
4794 * @param value value in the hash map
4795 * @return GNUNET_YES if we should continue to iterate,
4799 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
4801 struct MeshTunnel *t = value;
4808 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4810 * @param cls closure
4811 * @param key current key code
4812 * @param value value in the hash map
4813 * @return GNUNET_YES if we should continue to iterate,
4817 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
4819 struct MeshPeerInfo *p = value;
4820 struct MeshPeerQueue *q;
4821 struct MeshPeerQueue *n;
4829 queue_destroy(q, GNUNET_YES);
4833 peer_info_destroy (p);
4839 * Task run during shutdown.
4845 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4847 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
4849 if (core_handle != NULL)
4851 GNUNET_CORE_disconnect (core_handle);
4856 GNUNET_CRYPTO_ecc_key_create_stop (keygen);
4859 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4860 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4861 if (dht_handle != NULL)
4863 GNUNET_DHT_disconnect (dht_handle);
4868 GNUNET_SERVER_notification_context_destroy (nc);
4871 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4873 GNUNET_SCHEDULER_cancel (announce_id_task);
4874 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4876 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
4881 * Callback for hostkey read/generation.
4883 * @param cls Closure (Configuration handle).
4884 * @param pk The ECC private key.
4885 * @param emsg Error message, if any.
4888 key_generation_cb (void *cls,
4889 struct GNUNET_CRYPTO_EccPrivateKey *pk,
4892 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4893 struct MeshPeerInfo *peer;
4894 struct MeshPeerPath *p;
4899 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4900 _("Mesh service could not access hostkey: %s. Exiting.\n"),
4902 GNUNET_SCHEDULER_shutdown ();
4905 my_private_key = pk;
4906 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
4907 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4908 &my_full_id.hashPubKey);
4909 myid = GNUNET_PEER_intern (&my_full_id);
4910 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4911 "Mesh for peer [%s] starting\n",
4912 GNUNET_i2s(&my_full_id));
4914 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4915 NULL, /* Closure passed to MESH functions */
4916 &core_init, /* Call core_init once connected */
4917 &core_connect, /* Handle connects */
4918 &core_disconnect, /* remove peers on disconnects */
4919 NULL, /* Don't notify about all incoming messages */
4920 GNUNET_NO, /* For header only in notification */
4921 NULL, /* Don't notify about all outbound messages */
4922 GNUNET_NO, /* For header-only out notification */
4923 core_handlers); /* Register these handlers */
4925 if (core_handle == NULL)
4928 GNUNET_SCHEDULER_shutdown ();
4933 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4936 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4937 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
4938 GNUNET_SERVER_disconnect_notify (server_handle,
4939 &handle_local_client_disconnect, NULL);
4942 clients_head = NULL;
4943 clients_tail = NULL;
4946 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4948 /* Create a peer_info for the local peer */
4949 peer = peer_get (&my_full_id);
4952 GNUNET_PEER_change_rc (myid, 1);
4953 peer_info_add_path (peer, p, GNUNET_YES);
4954 GNUNET_SERVER_resume (server_handle);
4955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
4960 * Process mesh requests.
4962 * @param cls closure
4963 * @param server the initialized server
4964 * @param c configuration to use
4967 run (void *cls, struct GNUNET_SERVER_Handle *server,
4968 const struct GNUNET_CONFIGURATION_Handle *c)
4972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
4973 server_handle = server;
4976 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
4979 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4981 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4982 "mesh", "peer/privatekey");
4983 GNUNET_SCHEDULER_shutdown ();
4988 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
4989 &refresh_path_time))
4991 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4993 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4994 "mesh", "refresh path time");
4995 GNUNET_SCHEDULER_shutdown ();
5000 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5003 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5005 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5006 "mesh", "id announce time");
5007 GNUNET_SCHEDULER_shutdown ();
5012 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5015 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5017 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5018 "mesh", "connect timeout");
5019 GNUNET_SCHEDULER_shutdown ();
5024 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5027 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5029 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5030 "mesh", "max msgs queue");
5031 GNUNET_SCHEDULER_shutdown ();
5036 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5039 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5041 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5042 "mesh", "max tunnels");
5043 GNUNET_SCHEDULER_shutdown ();
5048 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5051 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5053 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5054 "mesh", "default ttl", 64);
5059 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5062 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5063 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5064 "mesh", "max peers", 1000);
5069 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5070 &dht_replication_level))
5072 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5074 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5075 "mesh", "dht replication level", 3);
5076 dht_replication_level = 3;
5079 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5080 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5081 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5082 types = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5084 dht_handle = GNUNET_DHT_connect (c, 64);
5085 if (NULL == dht_handle)
5089 stats = GNUNET_STATISTICS_create ("mesh", c);
5091 GNUNET_SERVER_suspend (server_handle);
5092 /* Scheduled the task to clean up when shutdown is called */
5093 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5095 keygen = GNUNET_CRYPTO_ecc_key_create_start (keyfile,
5098 GNUNET_free (keyfile);
5103 * The main function for the mesh service.
5105 * @param argc number of arguments from the command line
5106 * @param argv command line arguments
5107 * @return 0 ok, 1 on error
5110 main (int argc, char *const *argv)
5115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5116 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5118 ret = (GNUNET_OK == r) ? 0 : 1;
5119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
5123 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5124 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
5125 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);