2 This file is part of GNUnet.
3 (C) 2001-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
30 * - PERIODIC FUNCTIONS
31 * - MESH NETWORK HANDLER HELPERS
32 * - MESH NETWORK HANDLES
33 * - MESH LOCAL HANDLER HELPERS
34 * - MESH LOCAL HANDLES
35 * - MAIN FUNCTIONS (main & run)
38 * - error reporting (CREATE/CHANGE/ADD/DEL?) -- new message!
39 * - partial disconnect reporting -- same as error reporting?
41 * - relay corking down to core
42 * - set ttl relative to tree depth
43 * - Add data ACK count in path ACK
44 * - Make common GNUNET_MESH_Data header for unicast, to_orig, multicast
50 #include "mesh2_protocol.h"
51 #include "mesh_tunnel_tree.h"
52 #include "block_mesh.h"
53 #include "gnunet_dht_service.h"
54 #include "gnunet_statistics_service.h"
56 #define MESH_BLOOM_SIZE 128
58 #define MESH_DEBUG_DHT GNUNET_NO
59 #define MESH_DEBUG_CONNECTION GNUNET_NO
60 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
62 #define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\
63 GNUNET_TIME_UNIT_MINUTES,\
66 #if MESH_DEBUG_CONNECTION
67 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
69 #define DEBUG_CONN(...)
73 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
75 #define DEBUG_DHT(...)
82 struct timespec __mesh_start;
83 struct timespec __mesh_end;
84 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
85 #define INTERVAL_END \
87 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
88 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
89 if (__diff < 0) __diff += 1000000000;\
93 #define INTERVAL_SHOW \
95 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
97 #define INTERVAL_START
102 /******************************************************************************/
103 /************************ DATA STRUCTURES ****************************/
104 /******************************************************************************/
106 /** FWD declaration */
112 * Struct containing info about a queued transmission to this peer
119 struct MeshPeerQueue *next;
124 struct MeshPeerQueue *prev;
127 * Peer this transmission is directed to.
129 struct MeshPeerInfo *peer;
132 * Tunnel this message belongs to.
134 struct MeshTunnel *tunnel;
137 * Pointer to info stucture used as cls.
147 * Size of the message
154 * Struct containing all information regarding a given peer
164 * Last time we heard from this peer
166 struct GNUNET_TIME_Absolute last_contact;
169 * Number of attempts to reconnect so far
171 int n_reconnect_attempts;
174 * Paths to reach the peer, ordered by ascending hop count
176 struct MeshPeerPath *path_head;
179 * Paths to reach the peer, ordered by ascending hop count
181 struct MeshPeerPath *path_tail;
184 * Handle to stop the DHT search for a path to this peer
186 struct GNUNET_DHT_GetHandle *dhtget;
189 * Array of tunnels this peer is the target of.
190 * Most probably a small amount, therefore not a hashmap.
191 * When the path to the peer changes, notify these tunnels to let them
192 * re-adjust their path trees.
194 struct MeshTunnel **tunnels;
197 * Number of tunnels this peers participates in
199 unsigned int ntunnels;
202 * Transmission queue to core DLL head
204 struct MeshPeerQueue *queue_head;
207 * Transmission queue to core DLL tail
209 struct MeshPeerQueue *queue_tail;
212 * How many messages are in the queue to this peer.
214 unsigned int queue_n;
217 * Handle for queued transmissions
219 struct GNUNET_CORE_TransmitHandle *core_transmit;
224 * Struct to encapsulate all the Flow Control information to a peer in the
225 * context of a tunnel: Same peer in different tunnels will have independent
226 * flow control structures, allowing to choke/free tunnels according to its
229 struct MeshFlowControl
232 * ID of the last packet sent towards the peer.
234 uint32_t last_pid_sent;
237 * ID of the last packet received from the peer.
239 uint32_t last_pid_recv;
242 * Last ACK sent to the peer (peer can't send more than this PID).
244 uint32_t last_ack_sent;
247 * Last ACK sent towards the origin (for traffic towards leaf node).
249 uint32_t last_ack_recv;
252 * How many messages are in the queue towards this peer.
257 * Task to poll the peer in case of a lost ACK causes stall.
259 GNUNET_SCHEDULER_TaskIdentifier poll_task;
262 * How frequently to poll for ACKs.
264 struct GNUNET_TIME_Relative poll_time;
267 * On which tunnel to poll.
268 * Using an explicit poll_ctx would not help memory wise,
269 * since the allocated context would have to be stored in the
270 * fc struct in order to free it upon cancelling poll_task.
272 struct MeshTunnel *t;
277 * Globally unique tunnel identification (owner + number)
278 * DO NOT USE OVER THE NETWORK
283 * Node that owns the tunnel
288 * Tunnel number to differentiate all the tunnels owned by the node oid
289 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
291 MESH_TunnelNumber tid;
296 * Struct containing all information regarding a tunnel
297 * For an intermediate node the improtant info used will be:
298 * - id Tunnel unique identification
299 * - paths[0] To know where to send it next
300 * - metainfo: ready, speeds, accounting
307 struct MESH_TunnelID id;
310 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
312 MESH_TunnelNumber local_tid;
315 * Local tunnel number for local destination clients (incoming number)
316 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
319 MESH_TunnelNumber local_tid_dest;
322 * Is the tunnel bufferless (minimum latency)?
327 * Force sending ACK? Flag to allow duplicate ACK on POLL.
332 * How many messages do we accept in the forward queue.
334 unsigned int queue_max;
337 * Last time the tunnel was used
339 struct GNUNET_TIME_Absolute timestamp;
342 * Destination of the tunnel.
347 * Next hop in the tunnel. If 0, @c client must be set.
349 GNUNET_PEER_Id next_hop;
352 * Previous hop in the tunnel. If 0, @c owner must be set.
354 GNUNET_PEER_Id prev_hop;
357 * Flow control information about @c next_hop or @c client.
359 struct MeshFlowControl next_fc;
362 * Flow control information about @c prev_hop or @c owner.
364 struct MeshFlowControl prev_fc;
367 * Client owner of the tunnel, if any
369 struct MeshClient *owner;
372 * Client destination of the tunnel, if any.
374 struct MeshClient *client;
377 * Task to keep the used paths alive at the owner,
378 * time tunnel out on all the other peers.
380 GNUNET_SCHEDULER_TaskIdentifier maintenance_task;
383 * Path being used for the tunnel.
385 struct MeshPeerPath *path;
388 * Flag to signal the destruction of the tunnel.
389 * If this is set GNUNET_YES the tunnel will be destroyed
390 * when the queue is empty.
395 * Total messages pending for this tunnels, payload or not.
397 unsigned int pending_messages;
402 * Struct containing information about a client of the service
404 * TODO: add a list of 'waiting' types
411 struct MeshClient *next;
416 struct MeshClient *prev;
419 * Tunnels that belong to this client, indexed by local id
421 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
424 * Tunnels this client has accepted, indexed by incoming local id
426 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
429 * Handle to communicate with the client
431 struct GNUNET_SERVER_Client *handle;
434 * Messages that this client has declared interest in.
435 * Indexed by a GMC_hash32 (type), contains *Client.
437 struct GNUNET_CONTAINER_MultiHashMap *types;
440 * Whether the client is active or shutting down (don't send confirmations
441 * to a client that is shutting down.
446 * ID of the client, mainly for debug messages
453 /******************************************************************************/
454 /************************ DEBUG FUNCTIONS ****************************/
455 /******************************************************************************/
459 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
460 * @param cls string to print
461 * @param success GNUNET_OK if the PUT was transmitted,
462 * GNUNET_NO on timeout,
463 * GNUNET_SYSERR on disconnect from service
464 * after the PUT message was transmitted
465 * (so we don't know if it was received or not)
470 mesh_debug (void *cls, int success)
474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
478 unsigned int debug_fwd_ack;
479 unsigned int debug_bck_ack;
483 /******************************************************************************/
484 /*********************** GLOBAL VARIABLES ****************************/
485 /******************************************************************************/
487 /************************** Configuration parameters **************************/
490 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
492 static struct GNUNET_TIME_Relative refresh_path_time;
495 * How often to PUT own ID in the DHT.
497 static struct GNUNET_TIME_Relative id_announce_time;
500 * Maximum time allowed to connect to a peer found by string.
502 static struct GNUNET_TIME_Relative connect_timeout;
505 * Default TTL for payload packets.
507 static unsigned long long default_ttl;
510 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
512 static unsigned long long dht_replication_level;
515 * How many tunnels are we willing to maintain.
516 * Local tunnels are always allowed, even if there are more tunnels than max.
518 static unsigned long long max_tunnels;
521 * How many messages *in total* are we willing to queue, divided by number of
522 * tunnels to get tunnel queue size.
524 static unsigned long long max_msgs_queue;
527 * How many peers do we want to remember?
529 static unsigned long long max_peers;
532 /*************************** Static global variables **************************/
535 * Hostkey generation context
537 static struct GNUNET_CRYPTO_EccKeyGenerationContext *keygen;
540 * DLL with all the clients, head.
542 static struct MeshClient *clients_head;
545 * DLL with all the clients, tail.
547 static struct MeshClient *clients_tail;
550 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
552 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
555 * Number of tunnels known.
557 static unsigned long long n_tunnels;
560 * Tunnels incoming, indexed by MESH_TunnelNumber
561 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
563 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
566 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
568 static struct GNUNET_CONTAINER_MultiHashMap *peers;
571 * Handle to communicate with transport
573 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
576 * Handle to communicate with core.
578 static struct GNUNET_CORE_Handle *core_handle;
583 static struct GNUNET_DHT_Handle *dht_handle;
588 static struct GNUNET_SERVER_Handle *server_handle;
591 * Handle to the statistics service.
593 static struct GNUNET_STATISTICS_Handle *stats;
596 * Notification context, to send messages to local clients.
598 static struct GNUNET_SERVER_NotificationContext *nc;
601 * Local peer own ID (memory efficient handle).
603 static GNUNET_PEER_Id myid;
606 * Local peer own ID (full value).
608 static struct GNUNET_PeerIdentity my_full_id;
613 static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
618 static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key;
621 * Tunnel ID for the next created tunnel (global tunnel number).
623 static MESH_TunnelNumber next_tid;
626 * Tunnel ID for the next incoming tunnel (local tunnel number).
628 static MESH_TunnelNumber next_local_tid;
631 * All message types clients of this peer are interested in.
633 static struct GNUNET_CONTAINER_MultiHashMap *types;
636 * Task to periodically announce itself in the network.
638 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
641 * Next ID to assign to a client.
643 unsigned int next_client_id;
646 /******************************************************************************/
647 /*********************** DECLARATIONS **************************/
648 /******************************************************************************/
651 * Function to process paths received for a new peer addition. The recorded
652 * paths form the initial tunnel, which can be optimized later.
653 * Called on each result obtained for the DHT search.
656 * @param exp when will this value expire
657 * @param key key of the result
658 * @param type type of the result
659 * @param size number of bytes in data
660 * @param data pointer to the result data
663 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
664 const struct GNUNET_HashCode * key,
665 const struct GNUNET_PeerIdentity *get_path,
666 unsigned int get_path_length,
667 const struct GNUNET_PeerIdentity *put_path,
668 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
669 size_t size, const void *data);
673 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
674 * and insert it in the appropiate structures if the peer is not known yet.
676 * @param peer Full identity of the peer.
678 * @return Existing or newly created peer info.
680 static struct MeshPeerInfo *
681 peer_get (const struct GNUNET_PeerIdentity *peer);
685 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
686 * and insert it in the appropiate structures if the peer is not known yet.
688 * @param peer Short identity of the peer.
690 * @return Existing or newly created peer info.
692 static struct MeshPeerInfo *
693 peer_get_short (const GNUNET_PEER_Id peer);
697 * Build a PeerPath from the paths returned from the DHT, reversing the paths
698 * to obtain a local peer -> destination path and interning the peer ids.
700 * @return Newly allocated and created path
702 static struct MeshPeerPath *
703 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
704 unsigned int get_path_length,
705 const struct GNUNET_PeerIdentity *put_path,
706 unsigned int put_path_length);
710 * Adds a path to the peer_infos of all the peers in the path
712 * @param p Path to process.
713 * @param confirmed Whether we know if the path works or not.
716 path_add_to_peers (struct MeshPeerPath *p, int confirmed);
721 * Search for a tunnel by global ID using full PeerIdentities.
723 * @param oid owner of the tunnel.
724 * @param tid global tunnel number.
726 * @return tunnel handler, NULL if doesn't exist.
728 static struct MeshTunnel *
729 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
733 * Notify a tunnel that a connection has broken that affects at least
736 * @param t Tunnel affected.
737 * @param p1 Peer that got disconnected from p2.
738 * @param p2 Peer that got disconnected from p1.
740 * @return Short ID of the peer disconnected (either p1 or p2).
741 * 0 if the tunnel remained unaffected.
743 static GNUNET_PEER_Id
744 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
749 * Use the given path for the tunnel.
751 * @param t Tunnel to update.
752 * @param p Path to use.
755 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p);
758 * @brief Queue and pass message to core when possible.
760 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
761 * and accounts for it. In case the queue is full, the message is dropped and
764 * Otherwise, message is treated as internal and allowed to go regardless of
767 * @param cls Closure (@c type dependant). It will be used by queue_send to
768 * build the message to be sent if not already prebuilt.
769 * @param type Type of the message, 0 for a raw message.
770 * @param size Size of the message.
771 * @param dst Neighbor to send message to.
772 * @param t Tunnel this message belongs to.
775 queue_add (void *cls, uint16_t type, size_t size,
776 struct MeshPeerInfo *dst, struct MeshTunnel *t);
780 * Free a transmission that was already queued with all resources
781 * associated to the request.
783 * @param queue Queue handler to cancel.
784 * @param clear_cls Is it necessary to free associated cls?
787 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
791 * @brief Get the next transmittable message from the queue.
793 * This will be the head, except in the case of being a data packet
794 * not allowed by the destination peer.
796 * @param peer Destination peer.
798 * @return The next viable MeshPeerQueue element to send to that peer.
799 * NULL when there are no transmittable messages.
801 struct MeshPeerQueue *
802 queue_get_next (const struct MeshPeerInfo *peer);
806 * Core callback to write a queued packet to core buffer
808 * @param cls Closure (peer info).
809 * @param size Number of bytes available in buf.
810 * @param buf Where the to write the message.
812 * @return number of bytes written to buf
815 queue_send (void *cls, size_t size, void *buf);
818 /******************************************************************************/
819 /************************ PERIODIC FUNCTIONS ****************************/
820 /******************************************************************************/
823 * Periodically announce self id in the DHT
826 * @param tc task context
829 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
833 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
835 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
839 * - Set data expiration in function of X
842 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
844 block.id = my_full_id;
845 block.type = htonl (0);
846 GNUNET_DHT_put (dht_handle, /* DHT handle */
847 &my_full_id.hashPubKey, /* Key to use */
848 dht_replication_level, /* Replication level */
849 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
850 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
851 sizeof (block), /* Size of the data */
852 (const char *) &block, /* Data itself */
853 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
854 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
855 NULL, /* Continuation */
856 NULL); /* Continuation closure */
858 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
862 /******************************************************************************/
863 /****************** GENERAL HELPER FUNCTIONS ************************/
864 /******************************************************************************/
868 * Check if client has registered with the service and has not disconnected
870 * @param client the client to check
872 * @return non-NULL if client exists in the global DLL
874 static struct MeshClient *
875 client_get (struct GNUNET_SERVER_Client *client)
877 struct MeshClient *c;
882 if (c->handle == client)
891 * Deletes a tunnel from a client (either owner or destination). To be used on
894 * @param c Client whose tunnel to delete.
895 * @param t Tunnel which should be deleted.
898 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
900 struct GNUNET_HashCode hash;
904 GMC_hash32 (t->local_tid, &hash);
905 GNUNET_assert (GNUNET_YES ==
906 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels,
910 else if (c == t->client)
912 GMC_hash32 (t->local_tid_dest, &hash);
913 GNUNET_assert (GNUNET_YES ==
914 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels,
926 * Notify all clients (not depending on registration status) that the incoming
927 * tunnel is no longer valid.
929 * @param t Tunnel that was destroyed.
932 send_client_tunnel_destroy (struct MeshTunnel *t)
934 struct GNUNET_MESH_TunnelMessage msg;
936 if (NULL == t->client)
938 msg.header.size = htons (sizeof (msg));
939 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
940 msg.tunnel_id = htonl (t->local_tid_dest);
941 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
942 &msg.header, GNUNET_NO);
947 * Iterator over all the peers to remove the oldest not-used entry.
949 * @param cls Closure (unsued).
950 * @param key ID of the peer.
951 * @param value Peer_Info of the peer.
956 peer_info_timeout (void *cls,
957 const struct GNUNET_HashCode *key,
964 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
965 * and insert it in the appropiate structures if the peer is not known yet.
967 * @param peer Full identity of the peer.
969 * @return Existing or newly created peer info.
971 static struct MeshPeerInfo *
972 peer_get (const struct GNUNET_PeerIdentity *peer)
974 struct MeshPeerInfo *peer_info;
976 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
977 if (NULL == peer_info)
980 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
981 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
983 GNUNET_CONTAINER_multihashmap_iterate (peers,
987 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
988 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
989 peer_info->id = GNUNET_PEER_intern (peer);
991 peer_info->last_contact = GNUNET_TIME_absolute_get();
998 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
999 * and insert it in the appropiate structures if the peer is not known yet.
1001 * @param peer Short identity of the peer.
1003 * @return Existing or newly created peer info.
1005 static struct MeshPeerInfo *
1006 peer_get_short (const GNUNET_PEER_Id peer)
1008 struct GNUNET_PeerIdentity id;
1010 GNUNET_PEER_resolve (peer, &id);
1011 return peer_get (&id);
1016 * Choose the best path towards a peer considering the tunnel properties.
1018 * @param peer The destination peer.
1019 * @param t The tunnel the path is for.
1021 * @return Best current known path towards the peer, if any.
1023 static struct MeshPeerPath *
1024 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1026 struct MeshPeerPath *best_p;
1027 struct MeshPeerPath *p;
1028 unsigned int best_cost;
1031 best_p = p = peer->path_head;
1032 best_cost = cost = p->length;
1035 if ((cost = p->length) < best_cost)
1047 * Remove the tunnel from the list of tunnels to which a peer is target.
1049 * @param peer PeerInfo of the peer.
1050 * @param t Tunnel to remove.
1053 peer_remove_tunnel (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1057 for (i = 0; i < peer->ntunnels; i++)
1060 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1063 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1065 GNUNET_realloc (peer->tunnels,
1066 peer->ntunnels * sizeof(struct MeshTunnel *));
1074 * Core callback to write a pre-constructed data packet to core buffer
1076 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1077 * @param size Number of bytes available in buf.
1078 * @param buf Where the to write the message.
1080 * @return number of bytes written to buf
1083 send_core_data_raw (void *cls, size_t size, void *buf)
1085 struct GNUNET_MessageHeader *msg = cls;
1088 GNUNET_assert (NULL != msg);
1089 total_size = ntohs (msg->size);
1091 if (total_size > size)
1096 memcpy (buf, msg, total_size);
1103 * Sends an already built message to a peer, properly registrating
1104 * all used resources.
1106 * @param message Message to send. Function makes a copy of it.
1107 * @param peer Short ID of the neighbor whom to send the message.
1108 * @param t Tunnel on which this message is transmitted.
1111 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1112 GNUNET_PEER_Id peer,
1113 struct MeshTunnel *t)
1115 struct GNUNET_PeerIdentity id;
1116 struct MeshPeerInfo *neighbor;
1117 struct MeshPeerPath *p;
1122 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1127 size = ntohs (message->size);
1128 data = GNUNET_malloc (size);
1129 memcpy (data, message, size);
1130 type = ntohs(message->type);
1133 struct GNUNET_MESH_Unicast *u;
1134 struct GNUNET_MESH_ToOrigin *to;
1136 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1137 u = (struct GNUNET_MESH_Unicast *) data;
1138 u->ttl = htonl (ntohl (u->ttl) - 1);
1140 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1141 to = (struct GNUNET_MESH_ToOrigin *) data;
1142 t->prev_fc.last_pid_sent++; /* FIXME per hop? */
1143 to->pid = htonl (t->prev_fc.last_pid_sent);
1145 GNUNET_PEER_resolve (peer, &id);
1146 neighbor = peer_get (&id);
1147 for (p = neighbor->path_head; NULL != p; p = p->next)
1157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1158 " %s IS NOT DIRECTLY CONNECTED\n",
1160 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1163 for (p = neighbor->path_head; NULL != p; p = p->next)
1165 struct GNUNET_PeerIdentity debug_id;
1168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1169 " path with %u hops through:\n",
1171 for (i = 0; i < p->length; i++)
1173 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1176 i, GNUNET_i2s(&debug_id));
1180 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
1181 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1182 " no direct connection to %s\n",
1187 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1198 * Sends a CREATE PATH message for a path to a peer, properly registrating
1199 * all used resources.
1201 * @param peer PeerInfo of the final peer for whom this path is being created.
1202 * @param p Path itself.
1203 * @param t Tunnel for which the path is created.
1206 send_create_path (struct MeshPeerInfo *peer, struct MeshPeerPath *p,
1207 struct MeshTunnel *t)
1209 struct MeshPeerInfo *neighbor;
1217 neighbor = peer_get_short (t->next_hop);
1219 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1220 sizeof (struct GNUNET_MESH_ManipulatePath) +
1221 (p->length * sizeof (struct GNUNET_PeerIdentity)),
1228 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1230 * @param t Tunnel which to confirm.
1233 send_path_ack (struct MeshTunnel *t)
1235 struct MeshPeerInfo *peer;
1237 if (0 == t->prev_hop)
1243 peer = peer_get_short (t->prev_hop);
1246 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1247 sizeof (struct GNUNET_MESH_PathACK),
1254 * Try to establish a new connection to this peer in the fiven tunnel.
1255 * If the peer doesn't have any path to it yet, try to get one.
1256 * If the peer already has some path, send a CREATE PATH towards it.
1258 * @param peer PeerInfo of the peer.
1259 * @param t Tunnel for which to create the path, if possible.
1262 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1264 struct MeshPeerPath *p;
1266 if (NULL != peer->path_head)
1268 p = peer_get_best_path (peer, t);
1269 tunnel_use_path (t, p);
1270 send_create_path (peer, p, t);
1272 else if (NULL == peer->dhtget)
1274 struct GNUNET_PeerIdentity id;
1276 GNUNET_PEER_resolve (peer->id, &id);
1277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1278 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1279 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1280 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1281 &id.hashPubKey, /* key to search */
1282 dht_replication_level, /* replication level */
1283 GNUNET_DHT_RO_RECORD_ROUTE |
1284 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1286 0, /* xquery bits */
1287 &dht_get_id_handler, peer);
1289 /* Otherwise, there is no path but the DHT get is already started. */
1294 * Destroy the peer_info and free any allocated resources linked to it
1296 * @param pi The peer_info to destroy.
1298 * @return GNUNET_OK on success
1301 peer_info_destroy (struct MeshPeerInfo *pi)
1303 struct GNUNET_PeerIdentity id;
1304 struct MeshPeerPath *p;
1305 struct MeshPeerPath *nextp;
1307 GNUNET_PEER_resolve (pi->id, &id);
1308 GNUNET_PEER_change_rc (pi->id, -1);
1311 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1314 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1315 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1317 if (NULL != pi->dhtget)
1319 GNUNET_DHT_get_stop (pi->dhtget);
1325 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1335 * Remove all paths that rely on a direct connection between p1 and p2
1336 * from the peer itself and notify all tunnels about it.
1338 * @param peer PeerInfo of affected peer.
1339 * @param p1 GNUNET_PEER_Id of one peer.
1340 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1343 * TODO: optimize (see below)
1346 peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1349 struct MeshPeerPath *p;
1350 struct MeshPeerPath *next;
1351 struct MeshPeerInfo *peer_d;
1353 unsigned int destroyed;
1356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1358 for (p = peer->path_head; NULL != p; p = next)
1361 for (i = 0; i < (p->length - 1); i++)
1363 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1364 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1366 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1376 for (i = 0; i < peer->ntunnels; i++)
1378 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1382 peer_d = peer_get_short (d);
1383 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1384 tunnel_use_path (peer->tunnels[i], next);
1385 peer_connect (peer_d, peer->tunnels[i]);
1387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1392 * Add the path to the peer and update the path used to reach it in case this
1395 * @param peer_info Destination peer to add the path to.
1396 * @param path New path to add. Last peer must be the peer in arg 1.
1397 * Path will be either used of freed if already known.
1398 * @param trusted Do we trust that this path is real?
1401 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1404 struct MeshPeerPath *aux;
1408 if ((NULL == peer_info) || (NULL == path))
1411 path_destroy (path);
1414 if (path->peers[path->length - 1] != peer_info->id)
1417 path_destroy (path);
1420 if (path->length <= 2 && GNUNET_NO == trusted)
1422 /* Only allow CORE to tell us about direct paths */
1423 path_destroy (path);
1426 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1427 for (l = 1; l < path->length; l++)
1429 if (path->peers[l] == myid)
1431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1432 for (l2 = 0; l2 < path->length - l; l2++)
1434 path->peers[l2] = path->peers[l + l2];
1439 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1444 struct GNUNET_PeerIdentity id;
1446 GNUNET_PEER_resolve (peer_info->id, &id);
1447 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1448 path->length, GNUNET_i2s (&id));
1451 l = path_get_length (path);
1458 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1459 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1461 l2 = path_get_length (aux);
1464 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1465 peer_info->path_tail, aux, path);
1470 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1472 path_destroy (path);
1477 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1484 * Add the path to the origin peer and update the path used to reach it in case
1485 * this is the shortest.
1486 * The path is given in peer_info -> destination, therefore we turn the path
1487 * upside down first.
1489 * @param peer_info Peer to add the path to, being the origin of the path.
1490 * @param path New path to add after being inversed.
1491 * @param trusted Do we trust that this path is real?
1494 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1495 struct MeshPeerPath *path, int trusted)
1498 peer_info_add_path (peer_info, path, trusted);
1503 * Function called if the connection to the peer has been stalled for a while,
1504 * possibly due to a missed ACK. Poll the peer about its ACK status.
1506 * @param cls Closure (poll ctx).
1507 * @param tc TaskContext.
1510 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1512 struct MeshFlowControl *fc = cls;
1513 struct GNUNET_MESH_Poll msg;
1514 struct MeshTunnel *t = fc->t;
1515 GNUNET_PEER_Id peer;
1517 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1518 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1523 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
1524 msg.header.size = htons (sizeof (msg));
1525 msg.tid = htonl (t->id.tid);
1526 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1527 msg.last_ack = htonl (fc->last_ack_recv);
1529 if (fc == &t->prev_fc)
1537 send_prebuilt_message (&msg.header, peer, t);
1538 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
1539 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
1545 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1546 * to obtain a local peer -> destination path and interning the peer ids.
1548 * @return Newly allocated and created path
1550 static struct MeshPeerPath *
1551 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1552 unsigned int get_path_length,
1553 const struct GNUNET_PeerIdentity *put_path,
1554 unsigned int put_path_length)
1556 struct MeshPeerPath *p;
1562 GNUNET_PEER_change_rc (myid, 1);
1563 i = get_path_length;
1564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1565 for (i--; i >= 0; i--)
1567 id = GNUNET_PEER_intern (&get_path[i]);
1568 if (p->length > 0 && id == p->peers[p->length - 1])
1570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1571 GNUNET_PEER_change_rc (id, -1);
1575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1576 GNUNET_i2s (&get_path[i]));
1578 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1579 p->peers[p->length - 1] = id;
1582 i = put_path_length;
1583 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1584 for (i--; i >= 0; i--)
1586 id = GNUNET_PEER_intern (&put_path[i]);
1589 /* PUT path went through us, so discard the path up until now and start
1590 * from here to get a much shorter (and loop-free) path.
1595 if (p->length > 0 && id == p->peers[p->length - 1])
1597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1598 GNUNET_PEER_change_rc (id, -1);
1602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1603 GNUNET_i2s (&put_path[i]));
1605 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1606 p->peers[p->length - 1] = id;
1610 if (get_path_length > 0)
1611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1612 GNUNET_i2s (&get_path[0]));
1613 if (put_path_length > 0)
1614 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1615 GNUNET_i2s (&put_path[0]));
1616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1618 for (i = 0; i < p->length; i++)
1620 struct GNUNET_PeerIdentity peer_id;
1622 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1624 GNUNET_i2s (&peer_id));
1632 * Adds a path to the peer_infos of all the peers in the path
1634 * @param p Path to process.
1635 * @param confirmed Whether we know if the path works or not.
1638 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1642 /* TODO: invert and add */
1643 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1644 for (i++; i < p->length; i++)
1646 struct MeshPeerInfo *aux;
1647 struct MeshPeerPath *copy;
1649 aux = peer_get_short (p->peers[i]);
1650 copy = path_duplicate (p);
1651 copy->length = i + 1;
1652 peer_info_add_path (aux, copy, GNUNET_NO);
1658 * Send keepalive packets for a peer
1660 * @param cls Closure (tunnel for which to send the keepalive).
1661 * @param tc Notification context.
1664 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1668 * Search for a tunnel among the incoming tunnels
1670 * @param tid the local id of the tunnel
1672 * @return tunnel handler, NULL if doesn't exist
1674 static struct MeshTunnel *
1675 tunnel_get_incoming (MESH_TunnelNumber tid)
1677 struct GNUNET_HashCode hash;
1679 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1680 GMC_hash32 (tid, &hash);
1681 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1686 * Search for a tunnel among the tunnels for a client
1688 * @param c the client whose tunnels to search in
1689 * @param tid the local id of the tunnel
1691 * @return tunnel handler, NULL if doesn't exist
1693 static struct MeshTunnel *
1694 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1696 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1698 return tunnel_get_incoming (tid);
1702 struct GNUNET_HashCode hash;
1704 GMC_hash32 (tid, &hash);
1705 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
1711 * Search for a tunnel by global ID using PEER_ID
1713 * @param pi owner of the tunnel
1714 * @param tid global tunnel number
1716 * @return tunnel handler, NULL if doesn't exist
1718 static struct MeshTunnel *
1719 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1721 struct MESH_TunnelID id;
1722 struct GNUNET_HashCode hash;
1727 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1728 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1733 * Search for a tunnel by global ID using full PeerIdentities
1735 * @param oid owner of the tunnel
1736 * @param tid global tunnel number
1738 * @return tunnel handler, NULL if doesn't exist
1740 static struct MeshTunnel *
1741 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1743 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1748 * Add a client to a tunnel, initializing all needed data structures.
1750 * FIXME: make static after implementing port numbers
1752 * @param t Tunnel to which add the client.
1753 * @param c Client which to add to the tunnel.
1756 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
1758 if (NULL != t->client)
1763 if (0 != t->next_hop)
1773 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1777 for (i = 0; i < p->length; i++)
1779 if (p->peers[i] == myid)
1782 if (i > p->length - 1)
1788 if (i < p->length - 1)
1789 t->next_hop = p->peers[i + 1];
1793 t->prev_hop = p->peers[i - 1];
1797 if (NULL != t->path)
1798 path_destroy (t->path);
1799 t->path = path_duplicate (p);
1800 if (GNUNET_SCHEDULER_NO_TASK == t->maintenance_task)
1801 t->maintenance_task =
1802 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
1807 * Notifies a tunnel that a connection has broken that affects at least
1808 * some of its peers. Sends a notification towards the root of the tree.
1809 * In case the peer is the owner of the tree, notifies the client that owns
1810 * the tunnel and tries to reconnect.
1812 * @param t Tunnel affected.
1813 * @param p1 Peer that got disconnected from p2.
1814 * @param p2 Peer that got disconnected from p1.
1816 * @return Short ID of the peer disconnected (either p1 or p2).
1817 * 0 if the tunnel remained unaffected.
1819 static GNUNET_PEER_Id
1820 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1823 // if (myid != p1 && myid != p2) FIXME
1828 // if (tree_get_predecessor (t->tree) != 0)
1830 // /* We are the peer still connected, notify owner of the disconnection. */
1831 // struct GNUNET_MESH_PathBroken msg;
1832 // struct GNUNET_PeerIdentity neighbor;
1834 // msg.header.size = htons (sizeof (msg));
1835 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1836 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1837 // msg.tid = htonl (t->id.tid);
1838 // msg.peer1 = my_full_id;
1839 // GNUNET_PEER_resolve (pid, &msg.peer2);
1840 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
1841 // send_prebuilt_message (&msg.header, &neighbor, t);
1848 * Build a local ACK message and send it to a local client.
1850 * @param t Tunnel on which to send the ACK.
1851 * @param c Client to whom send the ACK.
1852 * @param ack Value of the ACK.
1855 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
1857 struct GNUNET_MESH_LocalAck msg;
1859 msg.header.size = htons (sizeof (msg));
1860 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1861 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
1862 msg.max_pid = htonl (ack);
1863 GNUNET_SERVER_notification_context_unicast(nc,
1870 * Build an ACK message and queue it to send to the given peer.
1872 * @param t Tunnel on which to send the ACK.
1873 * @param peer Peer to whom send the ACK.
1874 * @param ack Value of the ACK.
1877 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
1879 struct GNUNET_MESH_ACK msg;
1881 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1882 msg.header.size = htons (sizeof (msg));
1883 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
1884 msg.pid = htonl (ack);
1885 msg.tid = htonl (t->id.tid);
1887 send_prebuilt_message (&msg.header, peer, t);
1892 * Send an ACK informing the predecessor about the available buffer space.
1893 * In case there is no predecessor, inform the owning client.
1894 * If buffering is off, send only on behalf of children or self if endpoint.
1895 * If buffering is on, send when sent to children and buffer space is free.
1896 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
1897 * the ACK itself goes "back" (towards root).
1899 * @param t Tunnel on which to send the ACK.
1900 * @param type Type of message that triggered the ACK transmission.
1903 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
1907 /* Is it after unicast retransmission? */
1910 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1912 "ACK due to FWD DATA retransmission\n");
1913 if (GNUNET_YES == t->nobuffer)
1915 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
1919 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1920 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
1922 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1923 t->force_ack = GNUNET_YES;
1929 /* Check if we need to transmit the ACK */
1930 if (t->queue_max > t->next_fc.queue_n * 4 &&
1931 GMC_is_pid_bigger(t->prev_fc.last_ack_sent, t->prev_fc.last_pid_recv) &&
1932 GNUNET_NO == t->force_ack)
1934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
1935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1936 " t->qmax: %u, t->qn: %u\n",
1937 t->queue_max, t->next_fc.queue_n);
1938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1939 " t->pid: %u, t->ack: %u\n",
1940 t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent);
1944 /* Ok, ACK might be necessary, what PID to ACK? */
1945 ack = t->prev_fc.last_pid_recv + t->queue_max - t->next_fc.queue_n;
1946 if (ack == t->prev_fc.last_ack_sent && GNUNET_NO == t->force_ack)
1948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
1952 t->prev_fc.last_ack_sent = ack;
1953 if (0 != t->prev_hop)
1954 send_ack (t, t->prev_hop, ack);
1955 else if (NULL != t->owner)
1956 send_local_ack (t, t->owner, ack);
1960 t->force_ack = GNUNET_NO;
1965 * Send an ACK informing the children node/client about the available
1967 * If buffering is off, send only on behalf of root (can be self).
1968 * If buffering is on, send when sent to predecessor and buffer space is free.
1969 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
1970 * the ACK itself goes "forward" (towards children/clients).
1972 * @param t Tunnel on which to send the ACK.
1973 * @param type Type of message that triggered the ACK transmission.
1976 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
1979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1980 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
1981 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
1982 /* Is it after data to_origin retransmission? */
1985 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1986 if (GNUNET_YES == t->nobuffer)
1988 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1989 " Not sending ACK, nobuffer + traffic\n");
1993 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1994 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
1996 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1997 t->force_ack = GNUNET_YES;
2003 ack = t->next_fc.last_pid_recv + t->queue_max - t->prev_fc.queue_n;
2005 if (t->next_fc.last_ack_sent == ack && GNUNET_NO == t->force_ack)
2007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2008 " Not sending ACK, not needed\n");
2011 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2012 " Sending BCK ACK %u (last sent: %u)\n",
2013 ack, t->next_fc.last_ack_sent);
2014 t->next_fc.last_ack_sent = ack;
2016 if (0 != t->next_hop)
2017 send_ack (t, t->next_hop, ack);
2018 else if (NULL != t->client)
2019 send_local_ack (t, t->client, ack);
2022 t->force_ack = GNUNET_NO;
2027 * @brief Re-initiate traffic to this peer if necessary.
2029 * Check if there is traffic queued towards this peer
2030 * and the core transmit handle is NULL (traffic was stalled).
2031 * If so, call core tmt rdy.
2033 * @param peer_id Short ID of peer to which initiate traffic.
2036 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2038 struct MeshPeerInfo *peer;
2039 struct GNUNET_PeerIdentity id;
2040 struct MeshPeerQueue *q;
2043 peer = peer_get_short (peer_id);
2044 if (NULL != peer->core_transmit)
2047 q = queue_get_next (peer);
2050 /* Might br multicast traffic already sent to this particular peer but
2051 * not to other children in this tunnel.
2052 * This way t->queue_n would be > 0 but the queue of this particular peer
2058 GNUNET_PEER_resolve (peer->id, &id);
2059 peer->core_transmit =
2060 GNUNET_CORE_notify_transmit_ready(core_handle,
2063 GNUNET_TIME_UNIT_FOREVER_REL,
2073 * Send a message to all peers in this tunnel that the tunnel is no longer
2076 * @param t The tunnel whose peers to notify.
2079 tunnel_send_destroy (struct MeshTunnel *t)
2081 struct GNUNET_MESH_TunnelDestroy msg;
2082 struct GNUNET_PeerIdentity id;
2084 msg.header.size = htons (sizeof (msg));
2085 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2086 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2087 msg.tid = htonl (t->id.tid);
2088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2089 " sending tunnel destroy for tunnel: %s [%X]\n",
2090 GNUNET_i2s (&msg.oid), t->id.tid);
2092 if (0 != t->next_hop)
2094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2095 GNUNET_PEER_resolve (t->next_hop, &id);
2096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2097 " sending forward to %s\n",
2099 send_prebuilt_message (&msg.header, t->next_hop, t);
2101 if (0 != t->prev_hop)
2103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2104 GNUNET_PEER_resolve (t->prev_hop, &id);
2105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2106 " sending back to %s\n",
2108 send_prebuilt_message (&msg.header, t->prev_hop, t);
2114 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2116 * @param t Tunnel which to cancel.
2117 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2120 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2122 struct MeshPeerInfo *peer_info;
2123 struct MeshPeerQueue *pq;
2124 struct MeshPeerQueue *next;
2126 peer_info = peer_get_short (neighbor);
2127 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2130 if (pq->tunnel == t)
2132 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2133 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2135 // Should have been removed on destroy children
2138 queue_destroy (pq, GNUNET_YES);
2141 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2143 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2144 peer_info->core_transmit = NULL;
2150 * Destroy the tunnel and free any allocated resources linked to it.
2152 * @param t the tunnel to destroy
2154 * @return GNUNET_OK on success
2157 tunnel_destroy (struct MeshTunnel *t)
2159 struct MeshClient *c;
2160 struct GNUNET_HashCode hash;
2170 struct GNUNET_PeerIdentity id;
2172 GNUNET_PEER_resolve (t->id.oid, &id);
2173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2174 GNUNET_i2s (&id), t->id.tid);
2176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2180 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2181 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2189 GMC_hash32 (t->local_tid, &hash);
2191 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2198 if (NULL != t->client)
2200 GMC_hash32 (t->local_tid_dest, &hash);
2202 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2209 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2215 peer_cancel_queues (t->next_hop, t);
2216 peer_cancel_queues (t->prev_hop, t);
2218 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2219 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2222 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2227 #define TUNNEL_DESTROY_EMPTY_TIME GNUNET_TIME_UNIT_MILLISECONDS
2230 * Tunnel is empty: destroy it.
2232 * @param t Tunnel to destroy.
2235 tunnel_destroy_empty (struct MeshTunnel *t)
2239 struct GNUNET_PeerIdentity id;
2241 GNUNET_PEER_resolve (t->id.oid, &id);
2242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2243 "executing destruction of empty tunnel %s [%X]\n",
2244 GNUNET_i2s (&id), t->id.tid);
2248 tunnel_send_destroy (t);
2249 if (0 == t->pending_messages)
2252 t->destroy = GNUNET_YES;
2256 * Initialize a Flow Control structure to the initial state.
2258 * @param fc Flow Control structure to initialize.
2261 fc_init (struct MeshFlowControl *fc)
2263 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2264 fc->last_pid_recv = (uint32_t) -1;
2265 fc->last_ack_sent = INITIAL_WINDOW_SIZE - 1;
2266 fc->last_ack_recv = INITIAL_WINDOW_SIZE - 1;
2267 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2268 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2273 * Create a new tunnel
2275 * @param owner Who is the owner of the tunnel (short ID).
2276 * @param tid Tunnel Number of the tunnel.
2277 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2278 * @param local Tunnel Number for the tunnel, for the client point of view.
2280 * @return A new initialized tunnel. NULL on error.
2282 static struct MeshTunnel *
2283 tunnel_new (GNUNET_PEER_Id owner,
2284 MESH_TunnelNumber tid,
2285 struct MeshClient *client,
2286 MESH_TunnelNumber local)
2288 struct MeshTunnel *t;
2289 struct GNUNET_HashCode hash;
2291 if (n_tunnels >= max_tunnels && NULL == client)
2294 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2297 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2299 fc_init (&t->next_fc);
2300 fc_init (&t->prev_fc);
2301 t->local_tid = local;
2303 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2305 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2307 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2308 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2315 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2322 GMC_hash32 (t->local_tid, &hash);
2324 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
2325 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2329 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2340 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2341 * client when the client disconnects. If the client is not the owner, the
2342 * owner will get notified if no more clients are in the tunnel and the client
2343 * get removed from the tunnel's list.
2345 * @param cls closure (client that is disconnecting)
2346 * @param key the hash of the local tunnel id (used to access the hashmap)
2347 * @param value the value stored at the key (tunnel to destroy)
2349 * @return GNUNET_OK, keep iterating.
2352 tunnel_destroy_iterator (void *cls,
2353 const struct GNUNET_HashCode * key,
2356 struct MeshTunnel *t = value;
2357 struct MeshClient *c = cls;
2359 send_client_tunnel_destroy (t);
2362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %u is destination.\n", c->id);
2363 client_delete_tunnel (c, t);
2364 tunnel_destroy_empty (t);
2367 tunnel_send_destroy (t);
2369 t->destroy = GNUNET_YES;
2376 * Timeout function, destroys tunnel if called
2378 * @param cls Closure (tunnel to destroy).
2379 * @param tc TaskContext
2382 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2384 struct MeshTunnel *t = cls;
2385 struct GNUNET_PeerIdentity id;
2387 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2388 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2390 GNUNET_PEER_resolve(t->id.oid, &id);
2391 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2392 "Tunnel %s [%X] timed out. Destroying.\n",
2393 GNUNET_i2s(&id), t->id.tid);
2394 send_client_tunnel_destroy (t);
2400 * Resets the tunnel timeout. Starts it if no timeout was running.
2402 * @param t Tunnel whose timeout to reset.
2404 * TODO use heap to improve efficiency of scheduler.
2407 tunnel_reset_timeout (struct MeshTunnel *t)
2409 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
2411 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2412 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2413 t->maintenance_task =
2414 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2415 (refresh_path_time, 4), &tunnel_timeout, t);
2419 /******************************************************************************/
2420 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2421 /******************************************************************************/
2424 * Function to send a create path packet to a peer.
2426 * @param cls closure
2427 * @param size number of bytes available in buf
2428 * @param buf where the callee should write the message
2429 * @return number of bytes written to buf
2432 send_core_path_create (void *cls, size_t size, void *buf)
2434 struct MeshTunnel *t = cls;
2435 struct GNUNET_MESH_ManipulatePath *msg;
2436 struct GNUNET_PeerIdentity *peer_ptr;
2437 struct MeshPeerPath *p = t->path;
2442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
2444 sizeof (struct GNUNET_MESH_ManipulatePath) +
2445 p->length * sizeof (struct GNUNET_PeerIdentity);
2447 if (size < size_needed || NULL == buf)
2452 msg = (struct GNUNET_MESH_ManipulatePath *) buf;
2453 msg->header.size = htons (size_needed);
2454 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2455 msg->tid = ntohl (t->id.tid);
2458 if (GNUNET_YES == t->nobuffer)
2459 opt |= MESH_TUNNEL_OPT_NOBUFFER;
2460 msg->opt = htonl(opt);
2463 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2464 for (i = 0; i < p->length; i++)
2466 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470 "CREATE PATH (%u bytes long) sent!\n", size_needed);
2476 * Creates a path ack message in buf and frees all unused resources.
2478 * @param cls closure (MeshTransmissionDescriptor)
2479 * @param size number of bytes available in buf
2480 * @param buf where the callee should write the message
2481 * @return number of bytes written to buf
2484 send_core_path_ack (void *cls, size_t size, void *buf)
2486 struct MESH_TunnelID *id = cls;
2487 struct GNUNET_MESH_PathACK *msg = buf;
2489 GNUNET_assert (NULL != id);
2490 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2495 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2496 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2497 GNUNET_PEER_resolve (id->oid, &msg->oid);
2498 msg->tid = htonl (id->tid);
2499 msg->peer_id = my_full_id;
2501 /* TODO add signature */
2503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
2504 return sizeof (struct GNUNET_MESH_PathACK);
2509 * Free a transmission that was already queued with all resources
2510 * associated to the request.
2512 * @param queue Queue handler to cancel.
2513 * @param clear_cls Is it necessary to free associated cls?
2516 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
2518 struct MeshFlowControl *fc;
2520 if (GNUNET_YES == clear_cls)
2522 switch (queue->type)
2524 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2525 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
2526 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
2528 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2529 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2530 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2531 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2532 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2534 " prebuilt message\n");
2535 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2537 GNUNET_MESH_DEBUG_M2S (queue->type));
2539 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
2544 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2545 " type %s unknown!\n",
2546 GNUNET_MESH_DEBUG_M2S (queue->type));
2548 GNUNET_free_non_null (queue->cls);
2550 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
2551 queue->peer->queue_tail,
2554 /* Delete from appropiate fc in the tunnel */
2555 if (queue->peer->id == queue->tunnel->next_hop)
2556 fc = &queue->tunnel->next_fc;
2557 else if (queue->peer->id == queue->tunnel->next_hop)
2558 fc = &queue->tunnel->next_fc;
2565 GNUNET_free (queue);
2570 * @brief Get the next transmittable message from the queue.
2572 * This will be the head, except in the case of being a data packet
2573 * not allowed by the destination peer.
2575 * @param peer Destination peer.
2577 * @return The next viable MeshPeerQueue element to send to that peer.
2578 * NULL when there are no transmittable messages.
2580 struct MeshPeerQueue *
2581 queue_get_next (const struct MeshPeerInfo *peer)
2583 struct MeshPeerQueue *q;
2585 struct GNUNET_MESH_Unicast *ucast;
2586 struct GNUNET_MESH_ToOrigin *to_orig;
2587 struct MeshTunnel* t;
2591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
2592 for (q = peer->queue_head; NULL != q; q = q->next)
2595 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2597 GNUNET_MESH_DEBUG_M2S(q->type));
2600 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2601 ucast = (struct GNUNET_MESH_Unicast *) q->cls;
2602 pid = ntohl (ucast->pid);
2603 ack = t->next_fc.last_ack_recv;
2605 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2606 to_orig = (struct GNUNET_MESH_ToOrigin *) q->cls;
2607 pid = ntohl (to_orig->pid);
2608 ack = t->prev_fc.last_ack_recv;
2611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2616 "********* ACK: %u, PID: %u\n",
2618 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
2620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2627 "********* NEXT!\n");
2630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2631 "********* nothing found\n");
2637 queue_send (void *cls, size_t size, void *buf)
2639 struct MeshPeerInfo *peer = cls;
2640 struct GNUNET_MessageHeader *msg;
2641 struct MeshPeerQueue *queue;
2642 struct MeshTunnel *t;
2643 struct GNUNET_PeerIdentity dst_id;
2644 struct MeshFlowControl *fc;
2647 peer->core_transmit = NULL;
2649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
2650 queue = queue_get_next (peer);
2652 /* Queue has no internal mesh traffic nor sendable payload */
2655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
2656 if (NULL == peer->queue_head)
2657 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
2660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
2662 GNUNET_PEER_resolve (peer->id, &dst_id);
2663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2664 "********* towards %s\n",
2665 GNUNET_i2s (&dst_id));
2666 /* Check if buffer size is enough for the message */
2667 if (queue->size > size)
2669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2670 "********* not enough room, reissue\n");
2671 peer->core_transmit =
2672 GNUNET_CORE_notify_transmit_ready (core_handle,
2675 GNUNET_TIME_UNIT_FOREVER_REL,
2682 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
2685 GNUNET_assert (0 < t->pending_messages);
2686 t->pending_messages--;
2689 switch (queue->type)
2692 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2693 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2694 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
2695 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
2696 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2697 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2698 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2699 "********* raw: %s\n",
2700 GNUNET_MESH_DEBUG_M2S (queue->type));
2702 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2703 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2704 data_size = send_core_data_raw (queue->cls, size, buf);
2705 msg = (struct GNUNET_MessageHeader *) buf;
2706 switch (ntohs (msg->type)) // Type of preconstructed message
2708 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2709 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
2711 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2712 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
2718 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
2720 data_size = send_core_path_create (queue->cls, size, buf);
2722 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
2724 data_size = send_core_path_ack (queue->cls, size, buf);
2728 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2729 "********* type unknown: %u\n",
2733 switch (queue->type)
2735 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2736 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2737 // if (cinfo->send_buffer[cinfo->send_buffer_start] != queue)
2739 // GNUNET_break (0);
2740 // GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2741 // "at pos %u (%p) != %p\n",
2742 // cinfo->send_buffer_start,
2743 // cinfo->send_buffer[cinfo->send_buffer_start],
2746 // if (cinfo->send_buffer_n > 0)
2748 // cinfo->send_buffer[cinfo->send_buffer_start] = NULL;
2749 // cinfo->send_buffer_n--;
2750 // cinfo->send_buffer_start++;
2751 // cinfo->send_buffer_start %= t->fwd_queue_max;
2755 // GNUNET_break (0);
2762 /* Free queue, but cls was freed by send_core_* */
2763 queue_destroy (queue, GNUNET_NO);
2765 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
2767 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
2771 /* If more data in queue, send next */
2772 queue = queue_get_next (peer);
2775 struct GNUNET_PeerIdentity id;
2777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
2778 GNUNET_PEER_resolve (peer->id, &id);
2779 peer->core_transmit =
2780 GNUNET_CORE_notify_transmit_ready(core_handle,
2783 GNUNET_TIME_UNIT_FOREVER_REL,
2791 if (NULL != peer->queue_head)
2793 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2794 "********* %s stalled\n",
2795 GNUNET_i2s(&my_full_id));
2796 if (peer->id == t->next_hop)
2800 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
2803 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2808 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* return %d\n", data_size);
2814 * @brief Queue and pass message to core when possible.
2816 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
2817 * accounts for it. In case the queue is full, the message is dropped and
2820 * Otherwise, message is treated as internal and allowed to go regardless of
2823 * @param cls Closure (@c type dependant). It will be used by queue_send to
2824 * build the message to be sent if not already prebuilt.
2825 * @param type Type of the message, 0 for a raw message.
2826 * @param size Size of the message.
2827 * @param dst Neighbor to send message to.
2828 * @param t Tunnel this message belongs to.
2831 queue_add (void *cls, uint16_t type, size_t size,
2832 struct MeshPeerInfo *dst, struct MeshTunnel *t)
2834 struct MeshPeerQueue *queue;
2835 struct GNUNET_PeerIdentity id;
2839 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2841 n = &t->next_fc.queue_n;
2843 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
2845 n = &t->prev_fc.queue_n;
2849 if (*n >= t->queue_max)
2852 GNUNET_STATISTICS_update(stats,
2853 "# messages dropped (buffer full)",
2855 return; // Drop message
2859 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
2865 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
2866 if (NULL == dst->core_transmit)
2868 GNUNET_PEER_resolve (dst->id, &id);
2869 dst->core_transmit =
2870 GNUNET_CORE_notify_transmit_ready (core_handle,
2873 GNUNET_TIME_UNIT_FOREVER_REL,
2879 t->pending_messages++;
2883 /******************************************************************************/
2884 /******************** MESH NETWORK HANDLERS **************************/
2885 /******************************************************************************/
2889 * Core handler for path creation
2891 * @param cls closure
2892 * @param message message
2893 * @param peer peer identity this notification is about
2895 * @return GNUNET_OK to keep the connection open,
2896 * GNUNET_SYSERR to close it (signal serious error)
2899 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2900 const struct GNUNET_MessageHeader *message)
2902 unsigned int own_pos;
2905 MESH_TunnelNumber tid;
2906 struct GNUNET_MESH_ManipulatePath *msg;
2907 struct GNUNET_PeerIdentity *pi;
2908 struct GNUNET_HashCode hash;
2909 struct MeshPeerPath *path;
2910 struct MeshPeerInfo *dest_peer_info;
2911 struct MeshPeerInfo *orig_peer_info;
2912 struct MeshTunnel *t;
2914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2915 "Received a path create msg [%s]\n",
2916 GNUNET_i2s (&my_full_id));
2917 size = ntohs (message->size);
2918 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
2920 GNUNET_break_op (0);
2924 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
2925 if (size % sizeof (struct GNUNET_PeerIdentity))
2927 GNUNET_break_op (0);
2930 size /= sizeof (struct GNUNET_PeerIdentity);
2933 GNUNET_break_op (0);
2936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
2937 msg = (struct GNUNET_MESH_ManipulatePath *) message;
2939 tid = ntohl (msg->tid);
2940 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2942 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi), tid);
2943 t = tunnel_get (pi, tid);
2944 if (NULL == t) // FIXME only for INCOMING tunnels?
2948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
2949 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
2952 // FIXME notify failure
2955 opt = ntohl (msg->opt);
2956 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
2958 t->nobuffer = GNUNET_YES;
2959 t->prev_fc.last_ack_sent = t->prev_fc.last_pid_recv + 1;
2961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
2963 if (GNUNET_YES == t->nobuffer)
2968 // FIXME only assign a local tid if a local client is interested (on demand)
2969 while (NULL != tunnel_get_incoming (next_local_tid))
2970 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2971 t->local_tid_dest = next_local_tid++;
2972 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
2975 tunnel_reset_timeout (t);
2976 GMC_hash32 (t->local_tid_dest, &hash);
2978 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2979 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2987 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2988 if (NULL == dest_peer_info)
2990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2991 " Creating PeerInfo for destination.\n");
2992 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2993 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2994 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2996 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2998 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2999 if (NULL == orig_peer_info)
3001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3002 " Creating PeerInfo for origin.\n");
3003 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3004 orig_peer_info->id = GNUNET_PEER_intern (pi);
3005 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3006 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3008 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3009 path = path_new (size);
3011 for (i = 0; i < size; i++)
3013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3014 GNUNET_i2s (&pi[i]));
3015 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3016 if (path->peers[i] == myid)
3019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3022 /* cannot be self, must be 'not found' */
3023 /* create path: self not found in path through self */
3024 GNUNET_break_op (0);
3025 path_destroy (path);
3029 path_add_to_peers (path, GNUNET_NO);
3030 t->prev_hop = path->peers[own_pos - 1];
3031 GNUNET_PEER_change_rc (t->prev_hop, 1);
3032 if (own_pos == size - 1)
3034 /* It is for us! Send ack. */
3035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3036 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3042 struct MeshPeerPath *path2;
3044 t->next_hop = path->peers[own_pos + 1];
3045 GNUNET_PEER_change_rc(t->next_hop, 1);
3047 /* It's for somebody else! Retransmit. */
3048 path2 = path_duplicate (path);
3049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3050 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3051 path2 = path_duplicate (path);
3052 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
3053 send_create_path (dest_peer_info, path, t);
3060 * Core handler for path destruction
3062 * @param cls closure
3063 * @param message message
3064 * @param peer peer identity this notification is about
3066 * @return GNUNET_OK to keep the connection open,
3067 * GNUNET_SYSERR to close it (signal serious error)
3070 handle_mesh_path_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3071 const struct GNUNET_MessageHeader *message)
3073 struct GNUNET_MESH_ManipulatePath *msg;
3074 struct GNUNET_PeerIdentity *pi;
3075 struct MeshPeerPath *path;
3076 struct MeshTunnel *t;
3077 unsigned int own_pos;
3081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3082 "Received a PATH DESTROY msg from %s\n", GNUNET_i2s (peer));
3083 size = ntohs (message->size);
3084 if (size < sizeof (struct GNUNET_MESH_ManipulatePath))
3086 GNUNET_break_op (0);
3090 size -= sizeof (struct GNUNET_MESH_ManipulatePath);
3091 if (size % sizeof (struct GNUNET_PeerIdentity))
3093 GNUNET_break_op (0);
3096 size /= sizeof (struct GNUNET_PeerIdentity);
3099 GNUNET_break_op (0);
3102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3104 msg = (struct GNUNET_MESH_ManipulatePath *) message;
3105 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3107 " path is for tunnel %s [%X].\n", GNUNET_i2s (pi),
3109 t = tunnel_get (pi, ntohl (msg->tid));
3112 /* TODO notify back: we don't know this tunnel */
3113 GNUNET_break_op (0);
3116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3117 path = path_new (size);
3119 for (i = 0; i < size; i++)
3121 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3122 GNUNET_i2s (&pi[i]));
3123 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3124 if (path->peers[i] == myid)
3127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3128 if (own_pos < path->length - 1)
3129 send_prebuilt_message (message, path->peers[own_pos + 1], t);
3131 send_client_tunnel_destroy (t);
3133 // tunnel_delete_peer (t, path->peers[path->length - 1]); FIXME
3134 path_destroy (path);
3140 * Core handler for notifications of broken paths
3142 * @param cls closure
3143 * @param message message
3144 * @param peer peer identity this notification is about
3146 * @return GNUNET_OK to keep the connection open,
3147 * GNUNET_SYSERR to close it (signal serious error)
3150 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3151 const struct GNUNET_MessageHeader *message)
3153 struct GNUNET_MESH_PathBroken *msg;
3154 struct MeshTunnel *t;
3156 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3157 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3158 msg = (struct GNUNET_MESH_PathBroken *) message;
3159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3160 GNUNET_i2s (&msg->peer1));
3161 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3162 GNUNET_i2s (&msg->peer2));
3163 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3166 GNUNET_break_op (0);
3169 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3170 GNUNET_PEER_search (&msg->peer2));
3177 * Core handler for tunnel destruction
3179 * @param cls closure
3180 * @param message message
3181 * @param peer peer identity this notification is about
3183 * @return GNUNET_OK to keep the connection open,
3184 * GNUNET_SYSERR to close it (signal serious error)
3187 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3188 const struct GNUNET_MessageHeader *message)
3190 struct GNUNET_MESH_TunnelDestroy *msg;
3191 struct MeshTunnel *t;
3193 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3195 "Got a TUNNEL DESTROY packet from %s\n",
3197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3198 " for tunnel %s [%u]\n",
3199 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3200 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3203 /* Probably already got the message from another path,
3204 * destroyed the tunnel and retransmitted to children.
3207 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3211 // TODO check owner's signature
3212 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3214 /* Tunnel was incoming, notify clients */
3215 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3216 t->local_tid, t->local_tid_dest);
3217 send_client_tunnel_destroy (t);
3219 tunnel_send_destroy (t);
3220 t->destroy = GNUNET_YES;
3221 // TODO: add timeout to destroy the tunnel anyway
3227 * Core handler for mesh network traffic going from the origin to a peer
3229 * @param cls closure
3230 * @param peer peer identity this notification is about
3231 * @param message message
3232 * @return GNUNET_OK to keep the connection open,
3233 * GNUNET_SYSERR to close it (signal serious error)
3236 handle_mesh_data_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3237 const struct GNUNET_MessageHeader *message)
3239 struct GNUNET_MESH_Unicast *msg;
3240 struct MeshTunnel *t;
3245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3248 size = ntohs (message->size);
3250 sizeof (struct GNUNET_MESH_Unicast) +
3251 sizeof (struct GNUNET_MessageHeader))
3256 msg = (struct GNUNET_MESH_Unicast *) message;
3257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3258 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3260 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3263 /* TODO notify back: we don't know this tunnel */
3264 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3265 GNUNET_break_op (0);
3268 pid = ntohl (msg->pid);
3269 if (t->prev_fc.last_pid_recv == pid)
3271 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
3272 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3273 " Already seen pid %u, DROPPING!\n", pid);
3278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3279 " pid %u not seen yet, forwarding\n", pid);
3282 t->prev_fc.last_pid_recv = pid;
3284 if (GMC_is_pid_bigger (pid, t->prev_fc.last_ack_sent))
3286 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3287 GNUNET_break_op (0);
3288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3289 "Received PID %u, ACK %u\n",
3290 pid, t->prev_fc.last_ack_sent);
3294 tunnel_reset_timeout (t);
3295 if (t->dest == myid)
3297 if (NULL == t->client)
3302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3303 " it's for us! sending to clients...\n");
3304 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
3305 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
3306 message, GNUNET_NO);
3307 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3310 if (0 == t->next_hop)
3315 ttl = ntohl (msg->ttl);
3316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
3319 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
3320 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
3321 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3325 " not for us, retransmitting...\n");
3327 if (GNUNET_YES == t->nobuffer &&
3328 GNUNET_YES == GMC_is_pid_bigger (pid, t->next_fc.last_ack_recv))
3330 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3331 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " %u > %u\n",
3332 pid, t->next_fc.last_ack_recv);
3333 GNUNET_break_op (0);
3336 send_prebuilt_message (message, t->next_hop, t);
3337 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
3343 * Core handler for mesh network traffic toward the owner of a tunnel
3345 * @param cls closure
3346 * @param message message
3347 * @param peer peer identity this notification is about
3349 * @return GNUNET_OK to keep the connection open,
3350 * GNUNET_SYSERR to close it (signal serious error)
3353 handle_mesh_data_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3354 const struct GNUNET_MessageHeader *message)
3356 struct GNUNET_MESH_ToOrigin *msg;
3357 struct MeshPeerInfo *peer_info;
3358 struct MeshTunnel *t;
3362 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
3364 size = ntohs (message->size);
3365 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3366 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3368 GNUNET_break_op (0);
3371 msg = (struct GNUNET_MESH_ToOrigin *) message;
3372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3373 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3374 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3375 pid = ntohl (msg->pid);
3379 /* TODO notify that we dont know this tunnel (whom)? */
3380 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3382 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
3383 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3388 if (t->next_fc.last_pid_recv == pid)
3390 /* already seen this packet, drop */
3391 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
3392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3393 " Already seen pid %u, DROPPING!\n", pid);
3394 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3399 " pid %u not seen yet, forwarding\n", pid);
3400 t->next_fc.last_pid_recv = pid;
3402 if (NULL != t->owner)
3405 struct GNUNET_MESH_ToOrigin *copy;
3407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3408 " it's for us! sending to clients...\n");
3409 /* TODO signature verification */
3410 memcpy (cbuf, message, size);
3411 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3412 copy->tid = htonl (t->local_tid);
3413 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
3414 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3415 ©->header, GNUNET_NO);
3416 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
3419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3420 " not for us, retransmitting...\n");
3422 peer_info = peer_get (&msg->oid);
3423 if (NULL == peer_info)
3425 /* unknown origin of tunnel */
3429 if (0 == t->prev_hop) /* No owner AND no prev hop */
3431 if (GNUNET_YES == t->destroy)
3433 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3434 "to orig received on a dying tunnel %s [%X]\n",
3435 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3438 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3439 "unknown to origin at %s\n",
3440 GNUNET_i2s (&my_full_id));
3441 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3444 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3445 "for tunnel %s [%X]\n",
3446 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3449 send_prebuilt_message (message, t->prev_hop, t);
3450 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
3457 * Core handler for mesh network traffic point-to-point acks.
3459 * @param cls closure
3460 * @param message message
3461 * @param peer peer identity this notification is about
3463 * @return GNUNET_OK to keep the connection open,
3464 * GNUNET_SYSERR to close it (signal serious error)
3467 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3468 const struct GNUNET_MessageHeader *message)
3470 struct GNUNET_MESH_ACK *msg;
3471 struct MeshTunnel *t;
3474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
3476 msg = (struct GNUNET_MESH_ACK *) message;
3478 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3482 /* TODO notify that we dont know this tunnel (whom)? */
3483 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
3486 ack = ntohl (msg->pid);
3487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
3489 /* Is this a forward or backward ACK? */
3490 if (t->prev_hop != GNUNET_PEER_search (peer))
3493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
3494 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task &&
3495 GMC_is_pid_bigger (ack, t->next_fc.last_ack_recv))
3497 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3498 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3499 t->next_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3501 t->next_fc.last_ack_recv = ack;
3502 peer_unlock_queue (t->next_hop);
3503 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
3508 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task &&
3509 GMC_is_pid_bigger (ack, t->prev_fc.last_ack_recv))
3511 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3512 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3513 t->prev_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3515 t->prev_fc.last_ack_recv = ack;
3516 peer_unlock_queue (t->prev_hop);
3517 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3524 * Core handler for mesh network traffic point-to-point ack polls.
3526 * @param cls closure
3527 * @param message message
3528 * @param peer peer identity this notification is about
3530 * @return GNUNET_OK to keep the connection open,
3531 * GNUNET_SYSERR to close it (signal serious error)
3534 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
3535 const struct GNUNET_MessageHeader *message)
3537 struct GNUNET_MESH_Poll *msg;
3538 struct MeshTunnel *t;
3540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
3543 msg = (struct GNUNET_MESH_Poll *) message;
3545 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3549 /* TODO notify that we dont know this tunnel (whom)? */
3550 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
3551 GNUNET_break_op (0);
3555 /* Is this a forward or backward ACK? */
3556 if (t->prev_hop != GNUNET_PEER_search(peer))
3558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
3559 /* FIXME cinfo->bck_ack = cinfo->fwd_pid; // mark as ready to send */
3560 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3564 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
3565 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3572 * Core handler for path ACKs
3574 * @param cls closure
3575 * @param message message
3576 * @param peer peer identity this notification is about
3578 * @return GNUNET_OK to keep the connection open,
3579 * GNUNET_SYSERR to close it (signal serious error)
3582 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3583 const struct GNUNET_MessageHeader *message)
3585 struct GNUNET_MESH_PathACK *msg;
3586 struct MeshPeerInfo *peer_info;
3587 struct MeshPeerPath *p;
3588 struct MeshTunnel *t;
3590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3591 GNUNET_i2s (&my_full_id));
3592 msg = (struct GNUNET_MESH_PathACK *) message;
3593 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3596 /* TODO notify that we don't know the tunnel */
3597 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3599 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3603 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3605 peer_info = peer_get (&msg->peer_id);
3606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3607 GNUNET_i2s (&msg->peer_id));
3608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3611 /* Add path to peers? */
3615 path_add_to_peers (p, GNUNET_YES);
3622 /* Message for us? */
3623 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3625 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3626 if (NULL == t->owner)
3628 GNUNET_break_op (0);
3631 if (NULL != peer_info->dhtget)
3633 GNUNET_DHT_get_stop (peer_info->dhtget);
3634 peer_info->dhtget = NULL;
3639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3640 " not for us, retransmitting...\n");
3641 peer_info = peer_get (&msg->oid);
3642 send_prebuilt_message (message, t->prev_hop, t);
3648 * Core handler for mesh keepalives.
3650 * @param cls closure
3651 * @param message message
3652 * @param peer peer identity this notification is about
3653 * @return GNUNET_OK to keep the connection open,
3654 * GNUNET_SYSERR to close it (signal serious error)
3656 * TODO: Check who we got this from, to validate route.
3659 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
3660 const struct GNUNET_MessageHeader *message)
3662 struct GNUNET_MESH_TunnelKeepAlive *msg;
3663 struct MeshTunnel *t;
3665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
3668 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
3669 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3673 /* TODO notify that we dont know that tunnel */
3674 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
3679 tunnel_reset_timeout (t);
3681 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
3682 send_prebuilt_message (message, t->next_hop, t);
3689 * Functions to handle messages from core
3691 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3692 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3693 {&handle_mesh_path_destroy, GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY, 0},
3694 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3695 sizeof (struct GNUNET_MESH_PathBroken)},
3696 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
3697 sizeof (struct GNUNET_MESH_TunnelDestroy)},
3698 {&handle_mesh_data_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3699 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
3700 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
3701 {&handle_mesh_data_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3702 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
3703 sizeof (struct GNUNET_MESH_ACK)},
3704 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
3705 sizeof (struct GNUNET_MESH_Poll)},
3706 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3707 sizeof (struct GNUNET_MESH_PathACK)},
3713 /******************************************************************************/
3714 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3715 /******************************************************************************/
3720 * notify_client_connection_failure: notify a client that the connection to the
3721 * requested remote peer is not possible (for instance, no route found)
3722 * Function called when the socket is ready to queue more data. "buf" will be
3723 * NULL and "size" zero if the socket was closed for writing in the meantime.
3725 * @param cls closure
3726 * @param size number of bytes available in buf
3727 * @param buf where the callee should write the message
3728 * @return number of bytes written to buf
3731 notify_client_connection_failure (void *cls, size_t size, void *buf)
3734 struct MeshPeerInfo *peer_info;
3735 struct GNUNET_MESH_PeerControl *msg;
3736 struct GNUNET_PeerIdentity id;
3738 if (0 == size && NULL == buf)
3740 // TODO retry? cancel?
3744 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3745 peer_info = (struct MeshPeerInfo *) cls;
3746 msg = (struct GNUNET_MESH_PeerControl *) buf;
3747 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3748 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3749 // msg->tunnel_id = htonl(peer_info->t->tid);
3750 GNUNET_PEER_resolve (peer_info->id, &id);
3751 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3759 * Send keepalive packets for a tunnel.
3761 * @param cls Closure (tunnel for which to send the keepalive).
3762 * @param tc Notification context.
3765 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3767 struct MeshTunnel *t = cls;
3768 struct GNUNET_MESH_TunnelKeepAlive *msg;
3769 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
3772 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3773 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3774 NULL == t->owner || 0 == t->local_tid || 0 != t->prev_hop)
3779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3780 "sending keepalive for tunnel %d\n", t->id.tid);
3782 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
3783 msg->header.size = htons (size);
3784 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3785 msg->oid = my_full_id;
3786 msg->tid = htonl (t->id.tid);
3787 send_prebuilt_message (&msg->header, t->next_hop, t);
3789 t->maintenance_task =
3790 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3795 * Function to process paths received for a new peer addition. The recorded
3796 * paths form the initial tunnel, which can be optimized later.
3797 * Called on each result obtained for the DHT search.
3799 * @param cls closure
3800 * @param exp when will this value expire
3801 * @param key key of the result
3802 * @param get_path path of the get request
3803 * @param get_path_length lenght of get_path
3804 * @param put_path path of the put request
3805 * @param put_path_length length of the put_path
3806 * @param type type of the result
3807 * @param size number of bytes in data
3808 * @param data pointer to the result data
3810 * TODO: re-issue the request after certain time? cancel after X results?
3813 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3814 const struct GNUNET_HashCode * key,
3815 const struct GNUNET_PeerIdentity *get_path,
3816 unsigned int get_path_length,
3817 const struct GNUNET_PeerIdentity *put_path,
3818 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3819 size_t size, const void *data)
3821 struct MeshPeerInfo *peer = cls;
3822 struct MeshPeerPath *p;
3823 struct GNUNET_PeerIdentity pi;
3826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
3827 GNUNET_PEER_resolve (peer->id, &pi);
3828 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
3830 p = path_build_from_dht (get_path, get_path_length,
3831 put_path, put_path_length);
3832 path_add_to_peers (p, GNUNET_NO);
3834 for (i = 0; i < peer->ntunnels; i++)
3836 peer_connect (peer, peer->tunnels[i]); // FIXME add if
3843 /******************************************************************************/
3844 /********************* MESH LOCAL HANDLES **************************/
3845 /******************************************************************************/
3849 * Handler for client disconnection
3851 * @param cls closure
3852 * @param client identification of the client; NULL
3853 * for the last call when the server is destroyed
3856 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3858 struct MeshClient *c;
3859 struct MeshClient *next;
3861 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
3864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
3871 if (c->handle != client)
3873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
3877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
3879 GNUNET_SERVER_client_drop (c->handle);
3880 c->shutting_down = GNUNET_YES;
3881 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3882 &tunnel_destroy_iterator, c);
3883 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3884 &tunnel_destroy_iterator, c);
3885 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3886 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3888 if (NULL != c->types)
3889 GNUNET_CONTAINER_multihashmap_destroy (c->types);
3891 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
3892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
3894 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
3897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
3903 * Handler for new clients
3905 * @param cls closure
3906 * @param client identification of the client
3907 * @param message the actual message, which includes messages the client wants
3910 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3911 const struct GNUNET_MessageHeader *message)
3913 struct GNUNET_MESH_ClientConnect *cc_msg;
3914 struct MeshClient *c;
3920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
3922 /* Check data sanity */
3923 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3924 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3925 ntypes = ntohs (cc_msg->types);
3926 if (size != ntypes * sizeof (uint16_t))
3929 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3933 /* Create new client structure */
3934 c = GNUNET_malloc (sizeof (struct MeshClient));
3935 c->id = next_client_id++; // overflow not important: just for debug
3936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT NEW %u\n", c->id);
3937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u types\n", ntypes);
3939 GNUNET_SERVER_client_keep (client);
3943 struct GNUNET_HashCode hc;
3945 t = (uint16_t *) &cc_msg[1];
3946 c->types = GNUNET_CONTAINER_multihashmap_create (ntypes, GNUNET_NO);
3947 for (i = 0; i < ntypes; i++)
3950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " msg type: %u\n", u16);
3951 GMC_hash32 ((uint32_t) u16, &hc);
3953 /* store in clients hashmap */
3954 GNUNET_CONTAINER_multihashmap_put (c->types, &hc, c,
3955 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
3956 /* store in global hashmap */
3957 GNUNET_CONTAINER_multihashmap_put (types, &hc, c,
3958 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3962 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
3963 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3964 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3965 GNUNET_SERVER_notification_context_add (nc, client);
3966 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
3968 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
3974 * Handler for requests of new tunnels
3976 * @param cls Closure.
3977 * @param client Identification of the client.
3978 * @param message The actual message.
3981 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3982 const struct GNUNET_MessageHeader *message)
3984 struct GNUNET_MESH_TunnelMessage *t_msg;
3985 struct MeshPeerInfo *peer_info;
3986 struct MeshTunnel *t;
3987 struct MeshClient *c;
3988 MESH_TunnelNumber tid;
3990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
3992 /* Sanity check for client registration */
3993 if (NULL == (c = client_get (client)))
3996 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4001 /* Message sanity check */
4002 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4005 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4009 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4010 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4011 GNUNET_i2s (&t_msg->peer));
4012 /* Sanity check for tunnel numbering */
4013 tid = ntohl (t_msg->tunnel_id);
4014 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4017 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4020 /* Sanity check for duplicate tunnel IDs */
4021 if (NULL != tunnel_get_by_local_id (c, tid))
4024 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4028 while (NULL != tunnel_get_by_pi (myid, next_tid))
4029 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4030 t = tunnel_new (myid, next_tid, c, tid);
4031 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4035 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s [%x] (%x)\n",
4039 GNUNET_i2s (&my_full_id), t->id.tid, t->local_tid);
4041 peer_info = peer_get (&t_msg->peer);
4042 GNUNET_array_append (peer_info->tunnels, peer_info->ntunnels, t);
4043 peer_connect (peer_info, t);
4044 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4050 * Handler for requests of deleting tunnels
4052 * @param cls closure
4053 * @param client identification of the client
4054 * @param message the actual message
4057 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4058 const struct GNUNET_MessageHeader *message)
4060 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4061 struct MeshClient *c;
4062 struct MeshTunnel *t;
4063 MESH_TunnelNumber tid;
4065 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4066 "Got a DESTROY TUNNEL from client!\n");
4068 /* Sanity check for client registration */
4069 if (NULL == (c = client_get (client)))
4072 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4077 /* Message sanity check */
4078 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4081 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4085 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4087 /* Retrieve tunnel */
4088 tid = ntohl (tunnel_msg->tunnel_id);
4089 t = tunnel_get_by_local_id(c, tid);
4092 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4094 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4099 tunnel_destroy_empty (t);
4100 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4103 send_client_tunnel_destroy (t);
4104 client_delete_tunnel (c, t);
4106 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4108 tunnel_send_destroy (t);
4109 peer_remove_tunnel (peer_get_short(t->dest), t);
4110 t->destroy = GNUNET_YES;
4111 /* The tunnel will be destroyed when the last message is transmitted. */
4112 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4118 * Handler for requests of seeting tunnel's buffering policy.
4120 * @param cls Closure (unused).
4121 * @param client Identification of the client.
4122 * @param message The actual message.
4125 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
4126 const struct GNUNET_MessageHeader *message)
4128 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4129 struct MeshClient *c;
4130 struct MeshTunnel *t;
4131 MESH_TunnelNumber tid;
4133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4134 "Got a BUFFER request from client!\n");
4136 /* Sanity check for client registration */
4137 if (NULL == (c = client_get (client)))
4140 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4145 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4147 /* Retrieve tunnel */
4148 tid = ntohl (tunnel_msg->tunnel_id);
4149 t = tunnel_get_by_local_id(c, tid);
4152 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4154 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4158 switch (ntohs(message->type))
4160 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
4161 t->nobuffer = GNUNET_NO;
4163 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
4164 t->nobuffer = GNUNET_YES;
4170 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4175 * Handler for client traffic directed to one peer
4177 * @param cls closure
4178 * @param client identification of the client
4179 * @param message the actual message
4182 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4183 const struct GNUNET_MessageHeader *message)
4185 struct MeshClient *c;
4186 struct MeshTunnel *t;
4187 struct GNUNET_MESH_Unicast *data_msg;
4188 MESH_TunnelNumber tid;
4191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4192 "Got a unicast request from a client!\n");
4194 /* Sanity check for client registration */
4195 if (NULL == (c = client_get (client)))
4198 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4203 data_msg = (struct GNUNET_MESH_Unicast *) message;
4205 /* Sanity check for message size */
4206 size = ntohs (message->size);
4207 if (sizeof (struct GNUNET_MESH_Unicast) +
4208 sizeof (struct GNUNET_MessageHeader) > size)
4211 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4215 /* Tunnel exists? */
4216 tid = ntohl (data_msg->tid);
4217 t = tunnel_get_by_local_id (c, tid);
4221 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4225 /* Is it a local tunnel? Then, does client own the tunnel? */
4226 if (t->owner->handle != client)
4229 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4233 /* PID should be as expected: client<->service communication */
4234 if (ntohl (data_msg->pid) != t->prev_fc.last_pid_recv + 1)
4237 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4238 "Unicast PID, expected %u, got %u\n",
4239 t->prev_fc.last_pid_recv + 1, ntohl (data_msg->pid));
4240 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4244 /* Ok, everything is correct, send the message
4245 * (pretend we got it from a mesh peer)
4248 /* Work around const limitation */
4249 char buf[ntohs (message->size)] GNUNET_ALIGN;
4250 struct GNUNET_MESH_Unicast *copy;
4252 copy = (struct GNUNET_MESH_Unicast *) buf;
4253 memcpy (buf, data_msg, size);
4254 copy->oid = my_full_id;
4255 copy->tid = htonl (t->id.tid);
4256 copy->ttl = htonl (default_ttl);
4257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4258 " calling generic handler...\n");
4259 handle_mesh_data_unicast (NULL, &my_full_id, ©->header);
4261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4262 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4269 * Handler for client traffic directed to the origin
4271 * @param cls closure
4272 * @param client identification of the client
4273 * @param message the actual message
4276 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4277 const struct GNUNET_MessageHeader *message)
4279 struct GNUNET_MESH_ToOrigin *data_msg;
4280 struct MeshFlowControl *fc;
4281 struct MeshClient *c;
4282 struct MeshTunnel *t;
4283 MESH_TunnelNumber tid;
4286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4287 "Got a ToOrigin request from a client!\n");
4288 /* Sanity check for client registration */
4289 if (NULL == (c = client_get (client)))
4292 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4297 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4299 /* Sanity check for message size */
4300 size = ntohs (message->size);
4301 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4302 sizeof (struct GNUNET_MessageHeader) > size)
4305 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4309 /* Tunnel exists? */
4310 tid = ntohl (data_msg->tid);
4311 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4312 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4315 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4318 t = tunnel_get_by_local_id (c, tid);
4321 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4322 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4324 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4328 /* It should be sent by someone who has this as incoming tunnel. */
4332 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4336 /* PID should be as expected */
4338 if (ntohl (data_msg->pid) != fc->last_pid_recv + 1)
4341 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4342 "To Origin PID, expected %u, got %u\n",
4343 fc->last_pid_recv + 1,
4344 ntohl (data_msg->pid));
4345 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4348 fc->last_pid_recv++;
4350 /* Ok, everything is correct, send the message
4351 * (pretend we got it from a mesh peer)
4354 char buf[ntohs (message->size)] GNUNET_ALIGN;
4355 struct GNUNET_MESH_ToOrigin *copy;
4357 /* Work around 'const' limitation */
4358 memcpy (buf, data_msg, size);
4359 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4360 GNUNET_PEER_resolve (t->id.oid, ©->oid);
4361 copy->tid = htonl (t->id.tid);
4362 copy->ttl = htonl (default_ttl);
4363 copy->pid = htonl (t->prev_fc.last_pid_sent + 1);
4365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4366 " calling generic handler...\n");
4367 handle_mesh_data_to_orig (NULL, &my_full_id, ©->header);
4369 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4376 * Handler for client's ACKs for payload traffic.
4378 * @param cls Closure (unused).
4379 * @param client Identification of the client.
4380 * @param message The actual message.
4383 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
4384 const struct GNUNET_MessageHeader *message)
4386 struct GNUNET_MESH_LocalAck *msg;
4387 struct MeshTunnel *t;
4388 struct MeshClient *c;
4389 MESH_TunnelNumber tid;
4392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
4393 /* Sanity check for client registration */
4394 if (NULL == (c = client_get (client)))
4397 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4402 msg = (struct GNUNET_MESH_LocalAck *) message;
4404 /* Tunnel exists? */
4405 tid = ntohl (msg->tunnel_id);
4406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4407 t = tunnel_get_by_local_id (c, tid);
4411 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4412 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4413 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4417 ack = ntohl (msg->max_pid);
4418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
4420 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
4423 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
4424 t->prev_fc.last_ack_recv = ack;
4425 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4429 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
4430 t->next_fc.last_ack_recv = ack;
4431 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4434 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4442 * Iterator over all tunnels to send a monitoring client info about each tunnel.
4444 * @param cls Closure (client handle).
4445 * @param key Key (hashed tunnel ID, unused).
4446 * @param value Tunnel info.
4448 * @return GNUNET_YES, to keep iterating.
4451 monitor_all_tunnels_iterator (void *cls,
4452 const struct GNUNET_HashCode * key,
4455 struct GNUNET_SERVER_Client *client = cls;
4456 struct MeshTunnel *t = value;
4457 struct GNUNET_MESH_LocalMonitor *msg;
4459 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
4460 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
4461 msg->tunnel_id = htonl (t->id.tid);
4462 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4463 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
4464 GNUNET_PEER_resolve (t->dest, &msg->destination);
4466 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4467 "* sending info about tunnel %s [%u]\n",
4468 GNUNET_i2s (&msg->owner), t->id.tid);
4470 GNUNET_SERVER_notification_context_unicast (nc, client,
4471 &msg->header, GNUNET_NO);
4477 * Handler for client's MONITOR request.
4479 * @param cls Closure (unused).
4480 * @param client Identification of the client.
4481 * @param message The actual message.
4484 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
4485 const struct GNUNET_MessageHeader *message)
4487 struct MeshClient *c;
4489 /* Sanity check for client registration */
4490 if (NULL == (c = client_get (client)))
4493 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4497 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4498 "Received get tunnels request from client %u\n",
4500 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
4501 monitor_all_tunnels_iterator,
4503 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4504 "Get tunnels request from client %u completed\n",
4506 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4511 * Handler for client's MONITOR_TUNNEL request.
4513 * @param cls Closure (unused).
4514 * @param client Identification of the client.
4515 * @param message The actual message.
4518 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
4519 const struct GNUNET_MessageHeader *message)
4521 const struct GNUNET_MESH_LocalMonitor *msg;
4522 struct GNUNET_MESH_LocalMonitor *resp;
4523 struct MeshClient *c;
4524 struct MeshTunnel *t;
4526 /* Sanity check for client registration */
4527 if (NULL == (c = client_get (client)))
4530 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4534 msg = (struct GNUNET_MESH_LocalMonitor *) message;
4535 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4536 "Received tunnel info request from client %u for tunnel %s[%X]\n",
4539 ntohl (msg->tunnel_id));
4540 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
4543 /* We don't know the tunnel FIXME */
4544 struct GNUNET_MESH_LocalMonitor warn;
4547 GNUNET_SERVER_notification_context_unicast (nc, client,
4550 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4554 /* Initialize context */
4555 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
4557 GNUNET_PEER_resolve (t->dest, &resp->destination);
4558 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4559 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
4560 &resp->header, GNUNET_NO);
4563 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4564 "Monitor tunnel request from client %u completed\n",
4566 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4571 * Functions to handle messages from clients
4573 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4574 {&handle_local_new_client, NULL,
4575 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4576 {&handle_local_tunnel_create, NULL,
4577 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4578 sizeof (struct GNUNET_MESH_TunnelMessage)},
4579 {&handle_local_tunnel_destroy, NULL,
4580 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4581 sizeof (struct GNUNET_MESH_TunnelMessage)},
4582 {&handle_local_tunnel_buffer, NULL,
4583 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
4584 sizeof (struct GNUNET_MESH_TunnelMessage)},
4585 {&handle_local_tunnel_buffer, NULL,
4586 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
4587 sizeof (struct GNUNET_MESH_TunnelMessage)},
4588 {&handle_local_unicast, NULL,
4589 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4590 {&handle_local_to_origin, NULL,
4591 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4592 {&handle_local_ack, NULL,
4593 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
4594 sizeof (struct GNUNET_MESH_LocalAck)},
4595 {&handle_local_get_tunnels, NULL,
4596 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
4597 sizeof (struct GNUNET_MessageHeader)},
4598 {&handle_local_show_tunnel, NULL,
4599 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
4600 sizeof (struct GNUNET_MESH_LocalMonitor)},
4606 * To be called on core init/fail.
4608 * @param cls service closure
4609 * @param server handle to the server for this service
4610 * @param identity the public identity of this peer
4613 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4614 const struct GNUNET_PeerIdentity *identity)
4617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
4618 core_handle = server;
4619 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4622 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
4623 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4625 GNUNET_i2s (identity));
4626 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4628 GNUNET_i2s (&my_full_id));
4629 GNUNET_SCHEDULER_shutdown (); // Try gracefully
4631 GNUNET_abort(); // Try harder
4638 * Method called whenever a given peer connects.
4640 * @param cls closure
4641 * @param peer peer identity this notification is about
4644 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
4646 struct MeshPeerInfo *peer_info;
4647 struct MeshPeerPath *path;
4649 DEBUG_CONN ("Peer connected\n");
4650 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
4651 peer_info = peer_get (peer);
4652 if (myid == peer_info->id)
4654 DEBUG_CONN (" (self)\n");
4659 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
4661 path = path_new (2);
4662 path->peers[0] = myid;
4663 path->peers[1] = peer_info->id;
4664 GNUNET_PEER_change_rc (myid, 1);
4665 GNUNET_PEER_change_rc (peer_info->id, 1);
4666 peer_info_add_path (peer_info, path, GNUNET_YES);
4667 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
4673 * Method called whenever a peer disconnects.
4675 * @param cls closure
4676 * @param peer peer identity this notification is about
4679 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4681 struct MeshPeerInfo *pi;
4682 struct MeshPeerQueue *q;
4683 struct MeshPeerQueue *n;
4685 DEBUG_CONN ("Peer disconnected\n");
4686 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4696 /* TODO try to reroute this traffic instead */
4697 queue_destroy(q, GNUNET_YES);
4700 if (NULL != pi->core_transmit)
4702 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
4703 pi->core_transmit = NULL;
4705 peer_remove_path (pi, pi->id, myid);
4708 DEBUG_CONN (" (self)\n");
4710 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
4715 /******************************************************************************/
4716 /************************ MAIN FUNCTIONS ****************************/
4717 /******************************************************************************/
4720 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4722 * @param cls closure
4723 * @param key current key code
4724 * @param value value in the hash map
4725 * @return GNUNET_YES if we should continue to iterate,
4729 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
4731 struct MeshTunnel *t = value;
4738 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4740 * @param cls closure
4741 * @param key current key code
4742 * @param value value in the hash map
4743 * @return GNUNET_YES if we should continue to iterate,
4747 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
4749 struct MeshPeerInfo *p = value;
4750 struct MeshPeerQueue *q;
4751 struct MeshPeerQueue *n;
4759 queue_destroy(q, GNUNET_YES);
4763 peer_info_destroy (p);
4769 * Task run during shutdown.
4775 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
4779 if (core_handle != NULL)
4781 GNUNET_CORE_disconnect (core_handle);
4786 GNUNET_CRYPTO_ecc_key_create_stop (keygen);
4789 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4790 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4791 if (dht_handle != NULL)
4793 GNUNET_DHT_disconnect (dht_handle);
4798 GNUNET_SERVER_notification_context_destroy (nc);
4801 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4803 GNUNET_SCHEDULER_cancel (announce_id_task);
4804 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
4811 * Callback for hostkey read/generation.
4813 * @param cls Closure (Configuration handle).
4814 * @param pk The ECC private key.
4815 * @param emsg Error message, if any.
4818 key_generation_cb (void *cls,
4819 struct GNUNET_CRYPTO_EccPrivateKey *pk,
4822 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4823 struct MeshPeerInfo *peer;
4824 struct MeshPeerPath *p;
4829 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4830 _("Mesh service could not access hostkey: %s. Exiting.\n"),
4832 GNUNET_SCHEDULER_shutdown ();
4835 my_private_key = pk;
4836 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
4837 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4838 &my_full_id.hashPubKey);
4839 myid = GNUNET_PEER_intern (&my_full_id);
4840 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4841 "Mesh for peer [%s] starting\n",
4842 GNUNET_i2s(&my_full_id));
4844 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4845 NULL, /* Closure passed to MESH functions */
4846 &core_init, /* Call core_init once connected */
4847 &core_connect, /* Handle connects */
4848 &core_disconnect, /* remove peers on disconnects */
4849 NULL, /* Don't notify about all incoming messages */
4850 GNUNET_NO, /* For header only in notification */
4851 NULL, /* Don't notify about all outbound messages */
4852 GNUNET_NO, /* For header-only out notification */
4853 core_handlers); /* Register these handlers */
4855 if (core_handle == NULL)
4858 GNUNET_SCHEDULER_shutdown ();
4863 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4866 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4867 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
4868 GNUNET_SERVER_disconnect_notify (server_handle,
4869 &handle_local_client_disconnect, NULL);
4872 clients_head = NULL;
4873 clients_tail = NULL;
4876 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4878 /* Create a peer_info for the local peer */
4879 peer = peer_get (&my_full_id);
4882 GNUNET_PEER_change_rc (myid, 1);
4883 peer_info_add_path (peer, p, GNUNET_YES);
4884 GNUNET_SERVER_resume (server_handle);
4885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
4890 * Process mesh requests.
4892 * @param cls closure
4893 * @param server the initialized server
4894 * @param c configuration to use
4897 run (void *cls, struct GNUNET_SERVER_Handle *server,
4898 const struct GNUNET_CONFIGURATION_Handle *c)
4902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
4903 server_handle = server;
4906 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
4909 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4911 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4912 "mesh", "peer/privatekey");
4913 GNUNET_SCHEDULER_shutdown ();
4918 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
4919 &refresh_path_time))
4921 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4923 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4924 "mesh", "refresh path time");
4925 GNUNET_SCHEDULER_shutdown ();
4930 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
4933 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4935 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4936 "mesh", "id announce time");
4937 GNUNET_SCHEDULER_shutdown ();
4942 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
4945 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4947 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4948 "mesh", "connect timeout");
4949 GNUNET_SCHEDULER_shutdown ();
4954 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
4957 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4959 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4960 "mesh", "max msgs queue");
4961 GNUNET_SCHEDULER_shutdown ();
4966 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
4969 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4971 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4972 "mesh", "max tunnels");
4973 GNUNET_SCHEDULER_shutdown ();
4978 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
4981 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4983 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4984 "mesh", "default ttl", 64);
4989 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
4992 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4993 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4994 "mesh", "max peers", 1000);
4999 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5000 &dht_replication_level))
5002 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5004 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5005 "mesh", "dht replication level", 3);
5006 dht_replication_level = 3;
5009 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5010 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5011 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5012 types = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5014 dht_handle = GNUNET_DHT_connect (c, 64);
5015 if (NULL == dht_handle)
5019 stats = GNUNET_STATISTICS_create ("mesh", c);
5021 GNUNET_SERVER_suspend (server_handle);
5022 /* Scheduled the task to clean up when shutdown is called */
5023 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5025 keygen = GNUNET_CRYPTO_ecc_key_create_start (keyfile,
5028 GNUNET_free (keyfile);
5033 * The main function for the mesh service.
5035 * @param argc number of arguments from the command line
5036 * @param argv command line arguments
5037 * @return 0 ok, 1 on error
5040 main (int argc, char *const *argv)
5045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5046 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5048 ret = (GNUNET_OK == r) ? 0 : 1;
5049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
5053 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5054 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
5055 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);