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
8 option) any later version.
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh-new.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
27 * - relay corking down to core
28 * - set ttl relative to path length
31 * - keep queues until receiving ACK
37 #include "mesh2_protocol.h"
38 #include "mesh_path.h"
39 #include "block_mesh.h"
40 #include "gnunet_dht_service.h"
41 #include "gnunet_statistics_service.h"
43 #define MESH_BLOOM_SIZE 128
45 #define MESH_DEBUG_DHT GNUNET_NO
46 #define MESH_DEBUG_CONNECTION GNUNET_NO
47 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
49 #define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\
50 GNUNET_TIME_UNIT_MINUTES,\
53 #if MESH_DEBUG_CONNECTION
54 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
56 #define DEBUG_CONN(...)
60 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
62 #define DEBUG_DHT(...)
69 struct timespec __mesh_start;
70 struct timespec __mesh_end;
71 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
72 #define INTERVAL_END \
74 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
75 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
76 if (__diff < 0) __diff += 1000000000;\
80 #define INTERVAL_SHOW \
82 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
84 #define INTERVAL_START
89 /******************************************************************************/
90 /************************ DATA STRUCTURES ****************************/
91 /******************************************************************************/
93 /** FWD declaration */
99 * Struct containing info about a queued transmission to this peer
106 struct MeshPeerQueue *next;
111 struct MeshPeerQueue *prev;
114 * Peer this transmission is directed to.
116 struct MeshPeerInfo *peer;
119 * Tunnel this message belongs to.
121 struct MeshTunnel *tunnel;
124 * Pointer to info stucture used as cls.
134 * Size of the message
141 * Struct containing all information regarding a given peer
151 * Last time we heard from this peer
153 struct GNUNET_TIME_Absolute last_contact;
156 * Number of attempts to reconnect so far
158 int n_reconnect_attempts;
161 * Paths to reach the peer, ordered by ascending hop count
163 struct MeshPeerPath *path_head;
166 * Paths to reach the peer, ordered by ascending hop count
168 struct MeshPeerPath *path_tail;
171 * Handle to stop the DHT search for a path to this peer
173 struct GNUNET_DHT_GetHandle *dhtget;
176 * Array of tunnels this peer is the target of.
177 * Most probably a small amount, therefore not a hashmap.
178 * When the path to the peer changes, notify these tunnels to let them
179 * re-adjust their path trees.
181 struct MeshTunnel **tunnels;
184 * Number of tunnels this peers participates in
186 unsigned int ntunnels;
189 * Transmission queue to core DLL head
191 struct MeshPeerQueue *queue_head;
194 * Transmission queue to core DLL tail
196 struct MeshPeerQueue *queue_tail;
199 * How many messages are in the queue to this peer.
201 unsigned int queue_n;
204 * Handle for queued transmissions
206 struct GNUNET_CORE_TransmitHandle *core_transmit;
211 * Struct to encapsulate all the Flow Control information to a peer in the
212 * context of a tunnel: Same peer in different tunnels will have independent
213 * flow control structures, allowing to choke/free tunnels according to its
216 struct MeshFlowControl
219 * ID of the last packet sent towards the peer.
221 uint32_t last_pid_sent;
224 * ID of the last packet received from the peer.
226 uint32_t last_pid_recv;
229 * Last ACK sent to the peer (peer can't send more than this PID).
231 uint32_t last_ack_sent;
234 * Last ACK sent towards the origin (for traffic towards leaf node).
236 uint32_t last_ack_recv;
239 * How many messages are in the queue towards this peer.
244 * Task to poll the peer in case of a lost ACK causes stall.
246 GNUNET_SCHEDULER_TaskIdentifier poll_task;
249 * How frequently to poll for ACKs.
251 struct GNUNET_TIME_Relative poll_time;
254 * On which tunnel to poll.
255 * Using an explicit poll_ctx would not help memory wise,
256 * since the allocated context would have to be stored in the
257 * fc struct in order to free it upon cancelling poll_task.
259 struct MeshTunnel *t;
264 * Globally unique tunnel identification (owner + number)
265 * DO NOT USE OVER THE NETWORK
270 * Node that owns the tunnel
275 * Tunnel number to differentiate all the tunnels owned by the node oid
276 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
278 MESH_TunnelNumber tid;
283 * Struct containing all information regarding a tunnel
284 * For an intermediate node the improtant info used will be:
285 * - id Tunnel unique identification
286 * - paths[0] To know where to send it next
287 * - metainfo: ready, speeds, accounting
294 struct MESH_TunnelID id;
297 * Port of the tunnel.
302 * State of the tunnel.
304 enum MeshTunnelState state;
307 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
309 MESH_TunnelNumber local_tid;
312 * Local tunnel number for local destination clients (incoming number)
313 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
316 MESH_TunnelNumber local_tid_dest;
319 * Is the tunnel bufferless (minimum latency)?
324 * Force sending ACK? Flag to allow duplicate ACK on POLL.
329 * How many messages do we accept in the forward queue.
331 unsigned int queue_max;
334 * Last time the tunnel was used
336 struct GNUNET_TIME_Absolute timestamp;
339 * Destination of the tunnel.
344 * Next hop in the tunnel. If 0, @c client must be set.
346 GNUNET_PEER_Id next_hop;
349 * Previous hop in the tunnel. If 0, @c owner must be set.
351 GNUNET_PEER_Id prev_hop;
354 * Flow control information about @c next_hop or @c client.
356 struct MeshFlowControl next_fc;
359 * Flow control information about @c prev_hop or @c owner.
361 struct MeshFlowControl prev_fc;
364 * Client owner of the tunnel, if any
366 struct MeshClient *owner;
369 * Client destination of the tunnel, if any.
371 struct MeshClient *client;
374 * Task to keep the used paths alive at the owner,
375 * time tunnel out on all the other peers.
377 GNUNET_SCHEDULER_TaskIdentifier maintenance_task;
380 * Path being used for the tunnel.
382 struct MeshPeerPath *path;
385 * Flag to signal the destruction of the tunnel.
386 * If this is set GNUNET_YES the tunnel will be destroyed
387 * when the queue is empty.
392 * Total messages pending for this tunnels, payload or not.
394 unsigned int pending_messages;
399 * Struct containing information about a client of the service
401 * TODO: add a list of 'waiting' ports
408 struct MeshClient *next;
413 struct MeshClient *prev;
416 * Tunnels that belong to this client, indexed by local id
418 struct GNUNET_CONTAINER_MultiHashMap *own_tunnels;
421 * Tunnels this client has accepted, indexed by incoming local id
423 struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
426 * Handle to communicate with the client
428 struct GNUNET_SERVER_Client *handle;
431 * Ports that this client has declared interest in.
432 * Indexed by a GMC_hash32 (type), contains *Client.
434 struct GNUNET_CONTAINER_MultiHashMap *ports;
437 * Whether the client is active or shutting down (don't send confirmations
438 * to a client that is shutting down.
443 * ID of the client, mainly for debug messages
450 /******************************************************************************/
451 /************************ DEBUG FUNCTIONS ****************************/
452 /******************************************************************************/
456 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
457 * @param cls string to print
458 * @param success GNUNET_OK if the PUT was transmitted,
459 * GNUNET_NO on timeout,
460 * GNUNET_SYSERR on disconnect from service
461 * after the PUT message was transmitted
462 * (so we don't know if it was received or not)
467 mesh_debug (void *cls, int success)
471 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
476 unsigned int debug_fwd_ack;
477 unsigned int debug_bck_ack;
481 /******************************************************************************/
482 /*********************** GLOBAL VARIABLES ****************************/
483 /******************************************************************************/
485 /************************** Configuration parameters **************************/
488 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
490 static struct GNUNET_TIME_Relative refresh_path_time;
493 * How often to PUT own ID in the DHT.
495 static struct GNUNET_TIME_Relative id_announce_time;
498 * Maximum time allowed to connect to a peer found by string.
500 static struct GNUNET_TIME_Relative connect_timeout;
503 * Default TTL for payload packets.
505 static unsigned long long default_ttl;
508 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
510 static unsigned long long dht_replication_level;
513 * How many tunnels are we willing to maintain.
514 * Local tunnels are always allowed, even if there are more tunnels than max.
516 static unsigned long long max_tunnels;
519 * How many messages *in total* are we willing to queue, divided by number of
520 * tunnels to get tunnel queue size.
522 static unsigned long long max_msgs_queue;
525 * How many peers do we want to remember?
527 static unsigned long long max_peers;
530 /*************************** Static global variables **************************/
533 * Hostkey generation context
535 static struct GNUNET_CRYPTO_EccKeyGenerationContext *keygen;
538 * DLL with all the clients, head.
540 static struct MeshClient *clients_head;
543 * DLL with all the clients, tail.
545 static struct MeshClient *clients_tail;
548 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
550 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
553 * Number of tunnels known.
555 static unsigned long long n_tunnels;
558 * Tunnels incoming, indexed by MESH_TunnelNumber
559 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
561 static struct GNUNET_CONTAINER_MultiHashMap *incoming_tunnels;
564 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
566 static struct GNUNET_CONTAINER_MultiHashMap *peers;
569 * Handle to communicate with transport
571 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
574 * Handle to communicate with core.
576 static struct GNUNET_CORE_Handle *core_handle;
581 static struct GNUNET_DHT_Handle *dht_handle;
586 static struct GNUNET_SERVER_Handle *server_handle;
589 * Handle to the statistics service.
591 static struct GNUNET_STATISTICS_Handle *stats;
594 * Notification context, to send messages to local clients.
596 static struct GNUNET_SERVER_NotificationContext *nc;
599 * Local peer own ID (memory efficient handle).
601 static GNUNET_PEER_Id myid;
604 * Local peer own ID (full value).
606 static struct GNUNET_PeerIdentity my_full_id;
611 static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
616 static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key;
619 * Tunnel ID for the next created tunnel (global tunnel number).
621 static MESH_TunnelNumber next_tid;
624 * Tunnel ID for the next incoming tunnel (local tunnel number).
626 static MESH_TunnelNumber next_local_tid;
629 * All ports clients of this peer have opened.
631 static struct GNUNET_CONTAINER_MultiHashMap *ports;
634 * Task to periodically announce itself in the network.
636 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
639 * Next ID to assign to a client.
641 unsigned int next_client_id;
644 /******************************************************************************/
645 /*********************** DECLARATIONS **************************/
646 /******************************************************************************/
649 * Function to process paths received for a new peer addition. The recorded
650 * paths form the initial tunnel, which can be optimized later.
651 * Called on each result obtained for the DHT search.
654 * @param exp when will this value expire
655 * @param key key of the result
656 * @param type type of the result
657 * @param size number of bytes in data
658 * @param data pointer to the result data
661 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
662 const struct GNUNET_HashCode * key,
663 const struct GNUNET_PeerIdentity *get_path,
664 unsigned int get_path_length,
665 const struct GNUNET_PeerIdentity *put_path,
666 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
667 size_t size, const void *data);
671 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
672 * and insert it in the appropiate structures if the peer is not known yet.
674 * @param peer Full identity of the peer.
676 * @return Existing or newly created peer info.
678 static struct MeshPeerInfo *
679 peer_get (const struct GNUNET_PeerIdentity *peer);
683 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
684 * and insert it in the appropiate structures if the peer is not known yet.
686 * @param peer Short identity of the peer.
688 * @return Existing or newly created peer info.
690 static struct MeshPeerInfo *
691 peer_get_short (const GNUNET_PEER_Id peer);
695 * Build a PeerPath from the paths returned from the DHT, reversing the paths
696 * to obtain a local peer -> destination path and interning the peer ids.
698 * @return Newly allocated and created path
700 static struct MeshPeerPath *
701 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
702 unsigned int get_path_length,
703 const struct GNUNET_PeerIdentity *put_path,
704 unsigned int put_path_length);
708 * Adds a path to the peer_infos of all the peers in the path
710 * @param p Path to process.
711 * @param confirmed Whether we know if the path works or not.
714 path_add_to_peers (struct MeshPeerPath *p, int confirmed);
719 * Search for a tunnel by global ID using full PeerIdentities.
721 * @param oid owner of the tunnel.
722 * @param tid global tunnel number.
724 * @return tunnel handler, NULL if doesn't exist.
726 static struct MeshTunnel *
727 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
731 * Notify a tunnel that a connection has broken that affects at least
734 * @param t Tunnel affected.
735 * @param p1 Peer that got disconnected from p2.
736 * @param p2 Peer that got disconnected from p1.
738 * @return Short ID of the peer disconnected (either p1 or p2).
739 * 0 if the tunnel remained unaffected.
741 static GNUNET_PEER_Id
742 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
747 * @brief Use the given path for the tunnel.
748 * Update the next and prev hops (and RCs).
749 * (Re)start the path refresh in case the tunnel is locally owned.
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,
925 * Notify the appropiate client that a new incoming tunnel was created.
927 * @param t Tunnel that was created.
930 send_client_tunnel_create (struct MeshTunnel *t)
932 struct GNUNET_MESH_TunnelMessage msg;
934 if (NULL == t->client)
936 msg.header.size = htons (sizeof (msg));
937 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
938 msg.tunnel_id = htonl (t->local_tid_dest);
939 msg.port = htonl (t->port);
940 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
941 &msg.header, GNUNET_NO);
946 * Notify dest client that the incoming tunnel is no longer valid.
948 * @param t Tunnel that was destroyed.
951 send_client_tunnel_destroy (struct MeshTunnel *t)
953 struct GNUNET_MESH_TunnelMessage msg;
955 if (NULL == t->client)
957 msg.header.size = htons (sizeof (msg));
958 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
959 msg.tunnel_id = htonl (t->local_tid_dest);
960 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
961 &msg.header, GNUNET_NO);
966 * Iterator over all the peers to remove the oldest not-used entry.
968 * @param cls Closure (unsued).
969 * @param key ID of the peer.
970 * @param value Peer_Info of the peer.
975 peer_info_timeout (void *cls,
976 const struct GNUNET_HashCode *key,
983 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
984 * and insert it in the appropiate structures if the peer is not known yet.
986 * @param peer Full identity of the peer.
988 * @return Existing or newly created peer info.
990 static struct MeshPeerInfo *
991 peer_get (const struct GNUNET_PeerIdentity *peer)
993 struct MeshPeerInfo *peer_info;
995 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
996 if (NULL == peer_info)
999 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1000 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1002 GNUNET_CONTAINER_multihashmap_iterate (peers,
1006 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1007 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1008 peer_info->id = GNUNET_PEER_intern (peer);
1010 peer_info->last_contact = GNUNET_TIME_absolute_get();
1017 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1018 * and insert it in the appropiate structures if the peer is not known yet.
1020 * @param peer Short identity of the peer.
1022 * @return Existing or newly created peer info.
1024 static struct MeshPeerInfo *
1025 peer_get_short (const GNUNET_PEER_Id peer)
1027 struct GNUNET_PeerIdentity id;
1029 GNUNET_PEER_resolve (peer, &id);
1030 return peer_get (&id);
1035 * Choose the best path towards a peer considering the tunnel properties.
1037 * @param peer The destination peer.
1038 * @param t The tunnel the path is for.
1040 * @return Best current known path towards the peer, if any.
1042 static struct MeshPeerPath *
1043 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1045 struct MeshPeerPath *best_p;
1046 struct MeshPeerPath *p;
1047 unsigned int best_cost;
1050 best_p = p = peer->path_head;
1051 best_cost = cost = p->length;
1054 if ((cost = p->length) < best_cost)
1066 * Remove the tunnel from the list of tunnels to which a peer is target.
1068 * @param peer PeerInfo of the peer.
1069 * @param t Tunnel to remove.
1072 peer_remove_tunnel (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1076 for (i = 0; i < peer->ntunnels; i++)
1079 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1082 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1084 GNUNET_realloc (peer->tunnels,
1085 peer->ntunnels * sizeof(struct MeshTunnel *));
1093 * Core callback to write a pre-constructed data packet to core buffer
1095 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1096 * @param size Number of bytes available in buf.
1097 * @param buf Where the to write the message.
1099 * @return number of bytes written to buf
1102 send_core_data_raw (void *cls, size_t size, void *buf)
1104 struct GNUNET_MessageHeader *msg = cls;
1107 GNUNET_assert (NULL != msg);
1108 total_size = ntohs (msg->size);
1110 if (total_size > size)
1115 memcpy (buf, msg, total_size);
1122 * Sends an already built message to a peer, properly registrating
1123 * all used resources.
1125 * @param message Message to send. Function makes a copy of it.
1126 * @param peer Short ID of the neighbor whom to send the message.
1127 * @param t Tunnel on which this message is transmitted.
1130 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1131 GNUNET_PEER_Id peer,
1132 struct MeshTunnel *t)
1134 struct GNUNET_PeerIdentity id;
1135 struct MeshPeerInfo *neighbor;
1136 struct MeshPeerPath *p;
1141 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1146 size = ntohs (message->size);
1147 data = GNUNET_malloc (size);
1148 memcpy (data, message, size);
1149 type = ntohs(message->type);
1152 struct GNUNET_MESH_Unicast *u;
1154 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1155 u = (struct GNUNET_MESH_Unicast *) data;
1156 u->ttl = htonl (ntohl (u->ttl) - 1);
1159 GNUNET_PEER_resolve (peer, &id);
1160 neighbor = peer_get (&id);
1161 for (p = neighbor->path_head; NULL != p; p = p->next)
1171 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1172 " %s IS NOT DIRECTLY CONNECTED\n",
1174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1177 for (p = neighbor->path_head; NULL != p; p = p->next)
1179 struct GNUNET_PeerIdentity debug_id;
1182 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1183 " path with %u hops through:\n",
1185 for (i = 0; i < p->length; i++)
1187 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1190 i, GNUNET_i2s(&debug_id));
1194 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
1195 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1196 " no direct connection to %s\n",
1201 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1212 * Sends a CREATE PATH message for a path to a peer, properly registrating
1213 * all used resources.
1215 * @param t Tunnel for which the path is created.
1218 send_create_path (struct MeshTunnel *t)
1220 struct MeshPeerInfo *neighbor;
1222 neighbor = peer_get_short (t->next_hop);
1224 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1225 sizeof (struct GNUNET_MESH_CreateTunnel) +
1226 (t->path->length * sizeof (struct GNUNET_PeerIdentity)),
1229 t->state = MESH_TUNNEL_WAITING;
1234 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1236 * @param t Tunnel which to confirm.
1239 send_path_ack (struct MeshTunnel *t)
1241 struct MeshPeerInfo *peer;
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 given 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 (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);
1288 t->state = MESH_TUNNEL_SEARCHING;
1290 /* Otherwise, there is no path but the DHT get is already started. */
1295 * Destroy the peer_info and free any allocated resources linked to it
1297 * @param pi The peer_info to destroy.
1299 * @return GNUNET_OK on success
1302 peer_info_destroy (struct MeshPeerInfo *pi)
1304 struct GNUNET_PeerIdentity id;
1305 struct MeshPeerPath *p;
1306 struct MeshPeerPath *nextp;
1308 GNUNET_PEER_resolve (pi->id, &id);
1309 GNUNET_PEER_change_rc (pi->id, -1);
1312 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1315 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1316 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1318 if (NULL != pi->dhtget)
1320 GNUNET_DHT_get_stop (pi->dhtget);
1326 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1336 * Remove all paths that rely on a direct connection between p1 and p2
1337 * from the peer itself and notify all tunnels about it.
1339 * @param peer PeerInfo of affected peer.
1340 * @param p1 GNUNET_PEER_Id of one peer.
1341 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1344 * TODO: optimize (see below)
1347 peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1350 struct MeshPeerPath *p;
1351 struct MeshPeerPath *next;
1352 struct MeshPeerInfo *peer_d;
1354 unsigned int destroyed;
1357 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1359 for (p = peer->path_head; NULL != p; p = next)
1362 for (i = 0; i < (p->length - 1); i++)
1364 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1365 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1367 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1377 for (i = 0; i < peer->ntunnels; i++)
1379 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1383 peer_d = peer_get_short (d);
1384 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1385 tunnel_use_path (peer->tunnels[i], next);
1386 peer_connect (peer_d, peer->tunnels[i]);
1388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1393 * Add the path to the peer and update the path used to reach it in case this
1396 * @param peer_info Destination peer to add the path to.
1397 * @param path New path to add. Last peer must be the peer in arg 1.
1398 * Path will be either used of freed if already known.
1399 * @param trusted Do we trust that this path is real?
1402 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1405 struct MeshPeerPath *aux;
1409 if ((NULL == peer_info) || (NULL == path))
1412 path_destroy (path);
1415 if (path->peers[path->length - 1] != peer_info->id)
1418 path_destroy (path);
1421 if (path->length <= 2 && GNUNET_NO == trusted)
1423 /* Only allow CORE to tell us about direct paths */
1424 path_destroy (path);
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);
1528 if (fc == &t->prev_fc)
1532 else if (fc == &t->next_fc)
1541 send_prebuilt_message (&msg.header, peer, t);
1542 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
1543 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
1549 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1550 * to obtain a local peer -> destination path and interning the peer ids.
1552 * @return Newly allocated and created path
1554 static struct MeshPeerPath *
1555 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1556 unsigned int get_path_length,
1557 const struct GNUNET_PeerIdentity *put_path,
1558 unsigned int put_path_length)
1560 struct MeshPeerPath *p;
1566 GNUNET_PEER_change_rc (myid, 1);
1567 i = get_path_length;
1568 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1569 for (i--; i >= 0; i--)
1571 id = GNUNET_PEER_intern (&get_path[i]);
1572 if (p->length > 0 && id == p->peers[p->length - 1])
1574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1575 GNUNET_PEER_change_rc (id, -1);
1579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1580 GNUNET_i2s (&get_path[i]));
1582 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1583 p->peers[p->length - 1] = id;
1586 i = put_path_length;
1587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1588 for (i--; i >= 0; i--)
1590 id = GNUNET_PEER_intern (&put_path[i]);
1593 /* PUT path went through us, so discard the path up until now and start
1594 * from here to get a much shorter (and loop-free) path.
1599 if (p->length > 0 && id == p->peers[p->length - 1])
1601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1602 GNUNET_PEER_change_rc (id, -1);
1606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1607 GNUNET_i2s (&put_path[i]));
1609 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1610 p->peers[p->length - 1] = id;
1614 if (get_path_length > 0)
1615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1616 GNUNET_i2s (&get_path[0]));
1617 if (put_path_length > 0)
1618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1619 GNUNET_i2s (&put_path[0]));
1620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1622 for (i = 0; i < p->length; i++)
1624 struct GNUNET_PeerIdentity peer_id;
1626 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1627 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1628 GNUNET_i2s (&peer_id));
1636 * Adds a path to the peer_infos of all the peers in the path
1638 * @param p Path to process.
1639 * @param confirmed Whether we know if the path works or not.
1642 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1646 /* TODO: invert and add */
1647 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1648 for (i++; i < p->length; i++)
1650 struct MeshPeerInfo *aux;
1651 struct MeshPeerPath *copy;
1653 aux = peer_get_short (p->peers[i]);
1654 copy = path_duplicate (p);
1655 copy->length = i + 1;
1656 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
1662 * Send keepalive packets for a peer
1664 * @param cls Closure (tunnel for which to send the keepalive).
1665 * @param tc Notification context.
1668 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1672 * Search for a tunnel among the incoming tunnels
1674 * @param tid the local id of the tunnel
1676 * @return tunnel handler, NULL if doesn't exist
1678 static struct MeshTunnel *
1679 tunnel_get_incoming (MESH_TunnelNumber tid)
1681 struct GNUNET_HashCode hash;
1683 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1684 GMC_hash32 (tid, &hash);
1685 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1690 * Search for a tunnel among the tunnels for a client
1692 * @param c the client whose tunnels to search in
1693 * @param tid the local id of the tunnel
1695 * @return tunnel handler, NULL if doesn't exist
1697 static struct MeshTunnel *
1698 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1700 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1702 return tunnel_get_incoming (tid);
1706 struct GNUNET_HashCode hash;
1708 GMC_hash32 (tid, &hash);
1709 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
1715 * Search for a tunnel by global ID using PEER_ID
1717 * @param pi owner of the tunnel
1718 * @param tid global tunnel number
1720 * @return tunnel handler, NULL if doesn't exist
1722 static struct MeshTunnel *
1723 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1725 struct MESH_TunnelID id;
1726 struct GNUNET_HashCode hash;
1731 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1732 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1737 * Search for a tunnel by global ID using full PeerIdentities
1739 * @param oid owner of the tunnel
1740 * @param tid global tunnel number
1742 * @return tunnel handler, NULL if doesn't exist
1744 static struct MeshTunnel *
1745 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1747 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1752 * Add a client to a tunnel, initializing all needed data structures.
1754 * FIXME: make static after implementing port numbers
1756 * @param t Tunnel to which add the client.
1757 * @param c Client which to add to the tunnel.
1760 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
1762 if (NULL != t->client)
1767 if (0 != t->next_hop)
1777 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1779 unsigned int own_pos;
1781 for (own_pos = 0; own_pos < p->length; own_pos++)
1783 if (p->peers[own_pos] == myid)
1786 if (own_pos > p->length - 1)
1792 if (own_pos < p->length - 1)
1793 t->next_hop = p->peers[own_pos + 1];
1795 t->next_hop = p->peers[own_pos];
1796 GNUNET_PEER_change_rc (t->next_hop, 1);
1798 t->prev_hop = p->peers[own_pos - 1];
1800 t->prev_hop = p->peers[0];
1801 GNUNET_PEER_change_rc (t->prev_hop, 1);
1803 if (NULL != t->path)
1804 path_destroy (t->path);
1805 t->path = path_duplicate (p);
1808 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
1809 GNUNET_SCHEDULER_cancel (t->maintenance_task);
1810 t->maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
1817 * Notifies a tunnel that a connection has broken that affects at least
1818 * some of its peers. Sends a notification towards the root of the tree.
1819 * In case the peer is the owner of the tree, notifies the client that owns
1820 * the tunnel and tries to reconnect.
1822 * @param t Tunnel affected.
1823 * @param p1 Peer that got disconnected from p2.
1824 * @param p2 Peer that got disconnected from p1.
1826 * @return Short ID of the peer disconnected (either p1 or p2).
1827 * 0 if the tunnel remained unaffected.
1829 static GNUNET_PEER_Id
1830 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1833 // if (myid != p1 && myid != p2) FIXME
1838 // if (tree_get_predecessor (t->tree) != 0)
1840 // /* We are the peer still connected, notify owner of the disconnection. */
1841 // struct GNUNET_MESH_PathBroken msg;
1842 // struct GNUNET_PeerIdentity neighbor;
1844 // msg.header.size = htons (sizeof (msg));
1845 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1846 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1847 // msg.tid = htonl (t->id.tid);
1848 // msg.peer1 = my_full_id;
1849 // GNUNET_PEER_resolve (pid, &msg.peer2);
1850 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
1851 // send_prebuilt_message (&msg.header, &neighbor, t);
1858 * Build a local ACK message and send it to a local client.
1860 * @param t Tunnel on which to send the ACK.
1861 * @param c Client to whom send the ACK.
1862 * @param ack Value of the ACK.
1865 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
1867 struct GNUNET_MESH_LocalAck msg;
1869 msg.header.size = htons (sizeof (msg));
1870 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1871 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
1872 msg.max_pid = htonl (ack);
1873 GNUNET_SERVER_notification_context_unicast(nc,
1880 * Build an ACK message and queue it to send to the given peer.
1882 * @param t Tunnel on which to send the ACK.
1883 * @param peer Peer to whom send the ACK.
1884 * @param ack Value of the ACK.
1887 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
1889 struct GNUNET_MESH_ACK msg;
1891 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1892 msg.header.size = htons (sizeof (msg));
1893 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
1894 msg.pid = htonl (ack);
1895 msg.tid = htonl (t->id.tid);
1897 send_prebuilt_message (&msg.header, peer, t);
1902 * Send an ACK informing the predecessor about the available buffer space.
1903 * In case there is no predecessor, inform the owning client.
1904 * If buffering is off, send only on behalf of children or self if endpoint.
1905 * If buffering is on, send when sent to children and buffer space is free.
1906 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
1907 * the ACK itself goes "back" (towards root).
1909 * @param t Tunnel on which to send the ACK.
1910 * @param type Type of message that triggered the ACK transmission.
1913 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
1917 /* Is it after unicast retransmission? */
1920 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1922 "ACK due to FWD DATA retransmission\n");
1923 if (GNUNET_YES == t->nobuffer)
1925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
1929 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1930 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
1932 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1933 t->force_ack = GNUNET_YES;
1939 /* Check if we need to transmit the ACK */
1940 if (t->queue_max > t->next_fc.queue_n * 4 &&
1941 GMC_is_pid_bigger(t->prev_fc.last_ack_sent, t->prev_fc.last_pid_recv) &&
1942 GNUNET_NO == t->force_ack)
1944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
1945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1946 " t->qmax: %u, t->qn: %u\n",
1947 t->queue_max, t->next_fc.queue_n);
1948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1949 " t->pid: %u, t->ack: %u\n",
1950 t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent);
1954 /* Ok, ACK might be necessary, what PID to ACK? */
1955 ack = t->prev_fc.last_pid_recv + t->queue_max - t->next_fc.queue_n;
1956 if (ack == t->prev_fc.last_ack_sent && GNUNET_NO == t->force_ack)
1958 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
1962 t->prev_fc.last_ack_sent = ack;
1963 if (NULL != t->owner)
1964 send_local_ack (t, t->owner, ack);
1965 else if (0 != t->prev_hop)
1966 send_ack (t, t->prev_hop, ack);
1970 t->force_ack = GNUNET_NO;
1975 * Send an ACK informing the children node/client about the available
1977 * If buffering is off, send only on behalf of root (can be self).
1978 * If buffering is on, send when sent to predecessor and buffer space is free.
1979 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
1980 * the ACK itself goes "forward" (towards children/clients).
1982 * @param t Tunnel on which to send the ACK.
1983 * @param type Type of message that triggered the ACK transmission.
1986 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
1989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1990 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
1991 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
1992 /* Is it after data to_origin retransmission? */
1995 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
1996 if (GNUNET_YES == t->nobuffer)
1998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1999 " Not sending ACK, nobuffer + traffic\n");
2003 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2004 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2006 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2007 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2008 t->force_ack = GNUNET_YES;
2014 /* TODO: Check if we need to transmit the ACK (as in fwd) */
2016 ack = t->next_fc.last_pid_recv + t->queue_max - t->prev_fc.queue_n;
2018 if (t->next_fc.last_ack_sent == ack && GNUNET_NO == t->force_ack)
2020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2021 " Not sending ACK, not needed\n");
2024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2025 " Sending BCK ACK %u (last sent: %u)\n",
2026 ack, t->next_fc.last_ack_sent);
2027 t->next_fc.last_ack_sent = ack;
2029 if (NULL != t->client)
2030 send_local_ack (t, t->client, ack);
2031 else if (0 != t->next_hop)
2032 send_ack (t, t->next_hop, ack);
2035 t->force_ack = GNUNET_NO;
2040 * @brief Re-initiate traffic to this peer if necessary.
2042 * Check if there is traffic queued towards this peer
2043 * and the core transmit handle is NULL (traffic was stalled).
2044 * If so, call core tmt rdy.
2046 * @param peer_id Short ID of peer to which initiate traffic.
2049 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2051 struct MeshPeerInfo *peer;
2052 struct GNUNET_PeerIdentity id;
2053 struct MeshPeerQueue *q;
2056 peer = peer_get_short (peer_id);
2057 if (NULL != peer->core_transmit)
2060 q = queue_get_next (peer);
2063 /* Might br multicast traffic already sent to this particular peer but
2064 * not to other children in this tunnel.
2065 * This way t->queue_n would be > 0 but the queue of this particular peer
2071 GNUNET_PEER_resolve (peer->id, &id);
2072 peer->core_transmit =
2073 GNUNET_CORE_notify_transmit_ready(core_handle,
2076 GNUNET_TIME_UNIT_FOREVER_REL,
2086 * Send a message to all peers in this tunnel that the tunnel is no longer
2089 * @param t The tunnel whose peers to notify.
2092 tunnel_send_destroy (struct MeshTunnel *t)
2094 struct GNUNET_MESH_TunnelDestroy msg;
2095 struct GNUNET_PeerIdentity id;
2097 msg.header.size = htons (sizeof (msg));
2098 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2099 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2100 msg.tid = htonl (t->id.tid);
2101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2102 " sending tunnel destroy for tunnel: %s [%X]\n",
2103 GNUNET_i2s (&msg.oid), t->id.tid);
2105 if (NULL == t->client)
2107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2108 GNUNET_PEER_resolve (t->next_hop, &id);
2109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2110 " sending forward to %s\n",
2112 send_prebuilt_message (&msg.header, t->next_hop, t);
2114 if (NULL == t->owner)
2116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2117 GNUNET_PEER_resolve (t->prev_hop, &id);
2118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2119 " sending back to %s\n",
2121 send_prebuilt_message (&msg.header, t->prev_hop, t);
2127 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2129 * @param t Tunnel which to cancel.
2130 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2133 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2135 struct MeshPeerInfo *peer_info;
2136 struct MeshPeerQueue *pq;
2137 struct MeshPeerQueue *next;
2139 peer_info = peer_get_short (neighbor);
2140 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2143 if (pq->tunnel == t)
2145 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2146 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2148 /* Should have been removed on destroy children */
2151 queue_destroy (pq, GNUNET_YES);
2154 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2156 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2157 peer_info->core_transmit = NULL;
2163 * Destroy the tunnel and free any allocated resources linked to it.
2165 * @param t the tunnel to destroy
2167 * @return GNUNET_OK on success
2170 tunnel_destroy (struct MeshTunnel *t)
2172 struct MeshClient *c;
2173 struct GNUNET_HashCode hash;
2183 struct GNUNET_PeerIdentity id;
2185 GNUNET_PEER_resolve (t->id.oid, &id);
2186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2187 GNUNET_i2s (&id), t->id.tid);
2189 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2193 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2194 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2202 GMC_hash32 (t->local_tid, &hash);
2204 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2211 if (NULL != t->client)
2213 GMC_hash32 (t->local_tid_dest, &hash);
2215 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2222 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2228 peer_cancel_queues (t->next_hop, t);
2229 peer_cancel_queues (t->prev_hop, t);
2230 GNUNET_PEER_change_rc(t->next_hop, -1);
2231 GNUNET_PEER_change_rc(t->prev_hop, -1);
2233 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2234 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2237 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2243 * Tunnel is empty: destroy it.
2245 * @param t Tunnel to destroy.
2248 tunnel_destroy_empty (struct MeshTunnel *t)
2252 struct GNUNET_PeerIdentity id;
2254 GNUNET_PEER_resolve (t->id.oid, &id);
2255 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2256 "executing destruction of empty tunnel %s [%X]\n",
2257 GNUNET_i2s (&id), t->id.tid);
2261 tunnel_send_destroy (t);
2262 if (0 == t->pending_messages)
2265 t->destroy = GNUNET_YES;
2269 * Initialize a Flow Control structure to the initial state.
2271 * @param fc Flow Control structure to initialize.
2274 fc_init (struct MeshFlowControl *fc)
2276 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2277 fc->last_pid_recv = (uint32_t) -1;
2278 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
2279 fc->last_ack_recv = (uint32_t) -1;
2280 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2281 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2286 * Create a new tunnel
2288 * @param owner Who is the owner of the tunnel (short ID).
2289 * @param tid Tunnel Number of the tunnel.
2290 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2291 * @param local Tunnel Number for the tunnel, for the client point of view.
2293 * @return A new initialized tunnel. NULL on error.
2295 static struct MeshTunnel *
2296 tunnel_new (GNUNET_PEER_Id owner,
2297 MESH_TunnelNumber tid,
2298 struct MeshClient *client,
2299 MESH_TunnelNumber local)
2301 struct MeshTunnel *t;
2302 struct GNUNET_HashCode hash;
2304 if (n_tunnels >= max_tunnels && NULL == client)
2307 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2310 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2312 fc_init (&t->next_fc);
2313 fc_init (&t->prev_fc);
2314 t->local_tid = local;
2316 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2318 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2320 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2321 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2328 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2335 GMC_hash32 (t->local_tid, &hash);
2337 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
2338 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2342 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2353 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2354 * client when the client disconnects. If the client is not the owner, the
2355 * owner will get notified if no more clients are in the tunnel and the client
2356 * get removed from the tunnel's list.
2358 * @param cls closure (client that is disconnecting)
2359 * @param key the hash of the local tunnel id (used to access the hashmap)
2360 * @param value the value stored at the key (tunnel to destroy)
2362 * @return GNUNET_OK, keep iterating.
2365 tunnel_destroy_iterator (void *cls,
2366 const struct GNUNET_HashCode * key,
2369 struct MeshTunnel *t = value;
2370 struct MeshClient *c = cls;
2372 send_client_tunnel_destroy (t);
2375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client %u is destination.\n", c->id);
2376 client_delete_tunnel (c, t);
2377 tunnel_destroy_empty (t);
2380 tunnel_send_destroy (t);
2382 t->destroy = GNUNET_YES;
2389 * Timeout function, destroys tunnel if called
2391 * @param cls Closure (tunnel to destroy).
2392 * @param tc TaskContext
2395 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2397 struct MeshTunnel *t = cls;
2398 struct GNUNET_PeerIdentity id;
2400 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2401 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2403 GNUNET_PEER_resolve(t->id.oid, &id);
2404 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2405 "Tunnel %s [%X] timed out. Destroying.\n",
2406 GNUNET_i2s(&id), t->id.tid);
2407 send_client_tunnel_destroy (t);
2413 * Resets the tunnel timeout. Starts it if no timeout was running.
2415 * @param t Tunnel whose timeout to reset.
2417 * TODO use heap to improve efficiency of scheduler.
2420 tunnel_reset_timeout (struct MeshTunnel *t)
2422 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
2424 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2425 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2426 t->maintenance_task =
2427 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2428 (refresh_path_time, 4), &tunnel_timeout, t);
2432 /******************************************************************************/
2433 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2434 /******************************************************************************/
2437 * Function to send a create path packet to a peer.
2439 * @param cls closure
2440 * @param size number of bytes available in buf
2441 * @param buf where the callee should write the message
2442 * @return number of bytes written to buf
2445 send_core_path_create (void *cls, size_t size, void *buf)
2447 struct MeshTunnel *t = cls;
2448 struct GNUNET_MESH_CreateTunnel *msg;
2449 struct GNUNET_PeerIdentity *peer_ptr;
2450 struct MeshPeerPath *p = t->path;
2455 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
2457 sizeof (struct GNUNET_MESH_CreateTunnel) +
2458 p->length * sizeof (struct GNUNET_PeerIdentity);
2460 if (size < size_needed || NULL == buf)
2465 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
2466 msg->header.size = htons (size_needed);
2467 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2468 msg->tid = ntohl (t->id.tid);
2471 if (GNUNET_YES == t->nobuffer)
2472 opt |= MESH_TUNNEL_OPT_NOBUFFER;
2473 msg->opt = htonl (opt);
2474 msg->port = htonl (t->port);
2476 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2477 for (i = 0; i < p->length; i++)
2479 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2483 "CREATE PATH (%u bytes long) sent!\n", size_needed);
2489 * Creates a path ack message in buf and frees all unused resources.
2491 * @param cls closure (MeshTransmissionDescriptor)
2492 * @param size number of bytes available in buf
2493 * @param buf where the callee should write the message
2494 * @return number of bytes written to buf
2497 send_core_path_ack (void *cls, size_t size, void *buf)
2499 struct MeshTunnel *t = cls;
2500 struct GNUNET_MESH_PathACK *msg = buf;
2502 GNUNET_assert (NULL != t);
2503 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2508 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : INITIAL_WINDOW_SIZE - 1;
2509 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2510 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2511 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
2512 msg->tid = htonl (t->id.tid);
2513 msg->peer_id = my_full_id;
2514 msg->ack = htonl (t->prev_fc.last_ack_sent);
2516 /* TODO add signature */
2518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
2519 return sizeof (struct GNUNET_MESH_PathACK);
2524 * Free a transmission that was already queued with all resources
2525 * associated to the request.
2527 * @param queue Queue handler to cancel.
2528 * @param clear_cls Is it necessary to free associated cls?
2531 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
2533 struct MeshFlowControl *fc;
2535 if (GNUNET_YES == clear_cls)
2537 switch (queue->type)
2539 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2540 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
2541 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
2543 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2544 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2545 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2546 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2547 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2549 " prebuilt message\n");
2550 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2552 GNUNET_MESH_DEBUG_M2S (queue->type));
2554 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
2559 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2560 " type %s unknown!\n",
2561 GNUNET_MESH_DEBUG_M2S (queue->type));
2563 GNUNET_free_non_null (queue->cls);
2565 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
2566 queue->peer->queue_tail,
2569 /* Delete from appropiate fc in the tunnel */
2570 if (queue->peer->id == queue->tunnel->next_hop)
2571 fc = &queue->tunnel->next_fc;
2572 else if (queue->peer->id == queue->tunnel->next_hop)
2573 fc = &queue->tunnel->next_fc;
2580 GNUNET_free (queue);
2585 * @brief Get the next transmittable message from the queue.
2587 * This will be the head, except in the case of being a data packet
2588 * not allowed by the destination peer.
2590 * @param peer Destination peer.
2592 * @return The next viable MeshPeerQueue element to send to that peer.
2593 * NULL when there are no transmittable messages.
2595 struct MeshPeerQueue *
2596 queue_get_next (const struct MeshPeerInfo *peer)
2598 struct MeshPeerQueue *q;
2600 struct GNUNET_MESH_Unicast *ucast;
2601 struct GNUNET_MESH_ToOrigin *to_orig;
2602 struct MeshTunnel* t;
2606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* selecting message\n");
2607 for (q = peer->queue_head; NULL != q; q = q->next)
2610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2612 GNUNET_MESH_DEBUG_M2S(q->type));
2615 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2616 ucast = (struct GNUNET_MESH_Unicast *) q->cls;
2617 pid = ntohl (ucast->pid);
2618 ack = t->next_fc.last_ack_recv;
2620 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2621 to_orig = (struct GNUNET_MESH_ToOrigin *) q->cls;
2622 pid = ntohl (to_orig->pid);
2623 ack = t->prev_fc.last_ack_recv;
2626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2631 "********* ACK: %u, PID: %u\n",
2633 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
2635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2642 "********* NEXT!\n");
2645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2646 "********* nothing found\n");
2652 queue_send (void *cls, size_t size, void *buf)
2654 struct MeshPeerInfo *peer = cls;
2655 struct GNUNET_MessageHeader *msg;
2656 struct MeshPeerQueue *queue;
2657 struct MeshTunnel *t;
2658 struct GNUNET_PeerIdentity dst_id;
2659 struct MeshFlowControl *fc;
2663 peer->core_transmit = NULL;
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Queue send\n");
2666 queue = queue_get_next (peer);
2668 /* Queue has no internal mesh traffic nor sendable payload */
2671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not ready, return\n");
2672 if (NULL == peer->queue_head)
2673 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
2676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* not empty\n");
2678 GNUNET_PEER_resolve (peer->id, &dst_id);
2679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2680 "********* towards %s\n",
2681 GNUNET_i2s (&dst_id));
2682 /* Check if buffer size is enough for the message */
2683 if (queue->size > size)
2685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2686 "********* not enough room, reissue\n");
2687 peer->core_transmit =
2688 GNUNET_CORE_notify_transmit_ready (core_handle,
2691 GNUNET_TIME_UNIT_FOREVER_REL,
2698 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* size ok\n");
2701 GNUNET_assert (0 < t->pending_messages);
2702 t->pending_messages--;
2706 switch (queue->type)
2709 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2710 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2711 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
2712 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
2713 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2714 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2716 "********* raw: %s\n",
2717 GNUNET_MESH_DEBUG_M2S (queue->type));
2719 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2720 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2721 data_size = send_core_data_raw (queue->cls, size, buf);
2722 msg = (struct GNUNET_MessageHeader *) buf;
2723 type = ntohs (msg->type);
2725 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2726 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path create\n");
2727 data_size = send_core_path_create (queue->cls, size, buf);
2729 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* path ack\n");
2731 data_size = send_core_path_ack (queue->cls, size, buf);
2735 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2736 "********* type unknown: %u\n",
2741 /* Free queue, but cls was freed by send_core_* */
2742 queue_destroy (queue, GNUNET_NO);
2744 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
2747 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2748 t->next_fc.last_pid_sent = ((struct GNUNET_MESH_Unicast *) buf)->pid;
2749 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
2751 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2752 t->prev_fc.last_pid_sent = ((struct GNUNET_MESH_ToOrigin *) buf)->pid;
2753 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
2759 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
2761 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* destroying tunnel!\n");
2765 /* If more data in queue, send next */
2766 queue = queue_get_next (peer);
2769 struct GNUNET_PeerIdentity id;
2771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* more data!\n");
2772 GNUNET_PEER_resolve (peer->id, &id);
2773 peer->core_transmit =
2774 GNUNET_CORE_notify_transmit_ready(core_handle,
2777 GNUNET_TIME_UNIT_FOREVER_REL,
2783 else if (NULL != peer->queue_head)
2785 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2786 "********* %s stalled\n",
2787 GNUNET_i2s (&my_full_id));
2788 if (peer->id == t->next_hop)
2790 else if (peer->id == t->prev_hop)
2797 if (NULL != fc && GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
2800 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2804 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "********* Return %d\n", data_size);
2810 * @brief Queue and pass message to core when possible.
2812 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
2813 * accounts for it. In case the queue is full, the message is dropped and
2816 * Otherwise, message is treated as internal and allowed to go regardless of
2819 * @param cls Closure (@c type dependant). It will be used by queue_send to
2820 * build the message to be sent if not already prebuilt.
2821 * @param type Type of the message, 0 for a raw message.
2822 * @param size Size of the message.
2823 * @param dst Neighbor to send message to.
2824 * @param t Tunnel this message belongs to.
2827 queue_add (void *cls, uint16_t type, size_t size,
2828 struct MeshPeerInfo *dst, struct MeshTunnel *t)
2830 struct MeshPeerQueue *queue;
2831 struct GNUNET_PeerIdentity id;
2835 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2837 n = &t->next_fc.queue_n;
2839 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
2841 n = &t->prev_fc.queue_n;
2845 if (*n >= t->queue_max)
2848 GNUNET_STATISTICS_update(stats,
2849 "# messages dropped (buffer full)",
2851 return; /* Drop message */
2855 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
2861 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
2862 if (NULL == dst->core_transmit)
2864 GNUNET_PEER_resolve (dst->id, &id);
2865 dst->core_transmit =
2866 GNUNET_CORE_notify_transmit_ready (core_handle,
2869 GNUNET_TIME_UNIT_FOREVER_REL,
2875 t->pending_messages++;
2879 /******************************************************************************/
2880 /******************** MESH NETWORK HANDLERS **************************/
2881 /******************************************************************************/
2885 * Core handler for path creation
2887 * @param cls closure
2888 * @param message message
2889 * @param peer peer identity this notification is about
2891 * @return GNUNET_OK to keep the connection open,
2892 * GNUNET_SYSERR to close it (signal serious error)
2895 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2896 const struct GNUNET_MessageHeader *message)
2898 unsigned int own_pos;
2901 MESH_TunnelNumber tid;
2902 struct GNUNET_MESH_CreateTunnel *msg;
2903 struct GNUNET_PeerIdentity *pi;
2904 struct GNUNET_HashCode hash;
2905 struct MeshPeerPath *path;
2906 struct MeshPeerInfo *dest_peer_info;
2907 struct MeshPeerInfo *orig_peer_info;
2908 struct MeshTunnel *t;
2910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2911 "Received a path create msg [%s]\n",
2912 GNUNET_i2s (&my_full_id));
2913 size = ntohs (message->size);
2914 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
2916 GNUNET_break_op (0);
2920 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
2921 if (size % sizeof (struct GNUNET_PeerIdentity))
2923 GNUNET_break_op (0);
2926 size /= sizeof (struct GNUNET_PeerIdentity);
2929 GNUNET_break_op (0);
2932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
2933 msg = (struct GNUNET_MESH_CreateTunnel *) message;
2935 tid = ntohl (msg->tid);
2936 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2938 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
2939 t = tunnel_get (pi, tid);
2940 if (NULL == t) /* might be a local tunnel */
2944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
2945 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
2951 t->port = ntohl (msg->port);
2952 opt = ntohl (msg->opt);
2953 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
2955 t->nobuffer = GNUNET_YES;
2956 t->prev_fc.last_ack_sent = t->prev_fc.last_pid_recv + 1;
2957 t->next_fc.last_ack_sent = t->next_fc.last_pid_recv + 1;
2960 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
2962 tunnel_reset_timeout (t);
2963 GMC_hash32 (t->local_tid_dest, &hash);
2965 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
2966 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2973 t->state = MESH_TUNNEL_WAITING;
2975 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2976 if (NULL == dest_peer_info)
2978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2979 " Creating PeerInfo for destination.\n");
2980 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2981 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
2982 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
2984 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2986 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
2987 if (NULL == orig_peer_info)
2989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2990 " Creating PeerInfo for origin.\n");
2991 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
2992 orig_peer_info->id = GNUNET_PEER_intern (pi);
2993 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
2994 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
2996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
2997 path = path_new (size);
2999 for (i = 0; i < size; i++)
3001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3002 GNUNET_i2s (&pi[i]));
3003 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3004 if (path->peers[i] == myid)
3007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3008 if (own_pos == 0 && path->peers[own_pos] != myid)
3010 /* create path: self not found in path through self */
3011 GNUNET_break_op (0);
3012 path_destroy (path);
3016 path_add_to_peers (path, GNUNET_NO);
3017 tunnel_use_path (t, path);
3019 if (own_pos == size - 1)
3021 struct MeshClient *c;
3022 struct GNUNET_HashCode hc;
3024 /* Find target client */
3025 GMC_hash32 (t->port, &hc);
3026 c = GNUNET_CONTAINER_multihashmap_get (ports, &hc);
3029 /* TODO send reject */
3034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3035 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3038 /* Assign local tid */
3039 while (NULL != tunnel_get_incoming (next_local_tid))
3040 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3041 t->local_tid_dest = next_local_tid++;
3042 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3044 send_client_tunnel_create (t);
3049 struct MeshPeerPath *path2;
3051 t->next_hop = path->peers[own_pos + 1];
3052 GNUNET_PEER_change_rc(t->next_hop, 1);
3054 /* It's for somebody else! Retransmit. */
3055 path2 = path_duplicate (path);
3056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3057 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3058 path2 = path_duplicate (path);
3059 peer_info_add_path_to_origin (orig_peer_info, path2, GNUNET_NO);
3060 send_create_path (t);
3062 path_destroy (path);
3068 * Core handler for notifications of broken paths
3070 * @param cls closure
3071 * @param message message
3072 * @param peer peer identity this notification is about
3074 * @return GNUNET_OK to keep the connection open,
3075 * GNUNET_SYSERR to close it (signal serious error)
3078 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3079 const struct GNUNET_MessageHeader *message)
3081 struct GNUNET_MESH_PathBroken *msg;
3082 struct MeshTunnel *t;
3084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3085 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3086 msg = (struct GNUNET_MESH_PathBroken *) message;
3087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3088 GNUNET_i2s (&msg->peer1));
3089 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3090 GNUNET_i2s (&msg->peer2));
3091 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3094 GNUNET_break_op (0);
3097 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3098 GNUNET_PEER_search (&msg->peer2));
3105 * Core handler for tunnel destruction
3107 * @param cls closure
3108 * @param message message
3109 * @param peer peer identity this notification is about
3111 * @return GNUNET_OK to keep the connection open,
3112 * GNUNET_SYSERR to close it (signal serious error)
3115 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3116 const struct GNUNET_MessageHeader *message)
3118 struct GNUNET_MESH_TunnelDestroy *msg;
3119 struct MeshTunnel *t;
3121 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3123 "Got a TUNNEL DESTROY packet from %s\n",
3125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3126 " for tunnel %s [%u]\n",
3127 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3128 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3131 /* Probably already got the message from another path,
3132 * destroyed the tunnel and retransmitted to children.
3135 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3139 // TODO check owner's signature
3140 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3142 /* Tunnel was incoming, notify clients */
3143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3144 t->local_tid, t->local_tid_dest);
3145 send_client_tunnel_destroy (t);
3147 tunnel_send_destroy (t);
3148 t->destroy = GNUNET_YES;
3149 // TODO: add timeout to destroy the tunnel anyway
3155 * Core handler for mesh network traffic going from the origin to a peer
3157 * @param cls closure
3158 * @param peer peer identity this notification is about
3159 * @param message message
3160 * @return GNUNET_OK to keep the connection open,
3161 * GNUNET_SYSERR to close it (signal serious error)
3164 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3165 const struct GNUNET_MessageHeader *message)
3167 struct GNUNET_MESH_Unicast *msg;
3168 struct MeshTunnel *t;
3173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3176 size = ntohs (message->size);
3178 sizeof (struct GNUNET_MESH_Unicast) +
3179 sizeof (struct GNUNET_MessageHeader))
3184 msg = (struct GNUNET_MESH_Unicast *) message;
3185 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3186 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3188 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3191 /* TODO notify back: we don't know this tunnel */
3192 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3193 GNUNET_break_op (0);
3196 pid = ntohl (msg->pid);
3197 if (t->prev_fc.last_pid_recv == pid)
3199 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
3200 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3201 " Already seen pid %u, DROPPING!\n", pid);
3206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3207 " pid %u not seen yet, forwarding\n", pid);
3210 if (GMC_is_pid_bigger (pid, t->prev_fc.last_ack_sent))
3212 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3213 GNUNET_break_op (0);
3214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3215 "Received PID %u, ACK %u\n",
3216 pid, t->prev_fc.last_ack_sent);
3217 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3220 t->prev_fc.last_pid_recv = pid;
3222 tunnel_reset_timeout (t);
3223 if (t->dest == myid)
3225 if (NULL == t->client)
3230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3231 " it's for us! sending to clients...\n");
3232 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
3233 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
3234 message, GNUNET_NO);
3235 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3238 if (0 == t->next_hop)
3243 ttl = ntohl (msg->ttl);
3244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
3247 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
3248 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
3249 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3252 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3253 " not for us, retransmitting...\n");
3255 send_prebuilt_message (message, t->next_hop, t);
3256 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
3262 * Core handler for mesh network traffic toward the owner of a tunnel
3264 * @param cls closure
3265 * @param message message
3266 * @param peer peer identity this notification is about
3268 * @return GNUNET_OK to keep the connection open,
3269 * GNUNET_SYSERR to close it (signal serious error)
3272 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3273 const struct GNUNET_MessageHeader *message)
3275 struct GNUNET_MESH_ToOrigin *msg;
3276 struct MeshTunnel *t;
3280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
3282 size = ntohs (message->size);
3283 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3284 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3286 GNUNET_break_op (0);
3289 msg = (struct GNUNET_MESH_ToOrigin *) message;
3290 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3291 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3292 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3293 pid = ntohl (msg->pid);
3297 /* TODO notify that we dont know this tunnel (whom)? */
3298 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3300 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
3301 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3305 if (t->next_fc.last_pid_recv == pid)
3307 /* already seen this packet, drop */
3308 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
3309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3310 " Already seen pid %u, DROPPING!\n", pid);
3311 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3315 if (GMC_is_pid_bigger (pid, t->next_fc.last_ack_sent))
3317 GNUNET_STATISTICS_update (stats, "# unsolicited to_orig", 1, GNUNET_NO);
3318 GNUNET_break_op (0);
3319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3320 "Received PID %u, ACK %u\n",
3321 pid, t->next_fc.last_ack_sent);
3322 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3325 t->next_fc.last_pid_recv = pid;
3326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3327 " pid %u not seen yet, forwarding\n", pid);
3329 if (NULL != t->owner)
3332 struct GNUNET_MESH_ToOrigin *copy;
3334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3335 " it's for us! sending to clients...\n");
3336 /* TODO signature verification */
3337 memcpy (cbuf, message, size);
3338 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3339 copy->tid = htonl (t->local_tid);
3340 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
3341 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3342 ©->header, GNUNET_NO);
3343 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
3346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3347 " not for us, retransmitting...\n");
3349 if (0 == t->prev_hop) /* No owner AND no prev hop */
3351 if (GNUNET_YES == t->destroy)
3353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3354 "to orig received on a dying tunnel %s [%X]\n",
3355 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3358 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3359 "unknown to origin at %s\n",
3360 GNUNET_i2s (&my_full_id));
3361 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3364 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3365 "on tunnel %s [%X]\n",
3366 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3369 send_prebuilt_message (message, t->prev_hop, t);
3370 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
3377 * Core handler for mesh network traffic point-to-point acks.
3379 * @param cls closure
3380 * @param message message
3381 * @param peer peer identity this notification is about
3383 * @return GNUNET_OK to keep the connection open,
3384 * GNUNET_SYSERR to close it (signal serious error)
3387 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3388 const struct GNUNET_MessageHeader *message)
3390 struct GNUNET_MESH_ACK *msg;
3391 struct MeshTunnel *t;
3395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
3397 msg = (struct GNUNET_MESH_ACK *) message;
3399 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3403 /* TODO notify that we dont know this tunnel (whom)? */
3404 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
3407 ack = ntohl (msg->pid);
3408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
3410 /* Is this a forward or backward ACK? */
3411 id = GNUNET_PEER_search (peer);
3412 if (t->next_hop == id)
3415 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
3416 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task &&
3417 GMC_is_pid_bigger (ack, t->next_fc.last_ack_recv))
3419 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3420 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3421 t->next_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3423 t->next_fc.last_ack_recv = ack;
3424 peer_unlock_queue (t->next_hop);
3425 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3427 else if (t->prev_hop == id)
3430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
3431 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task &&
3432 GMC_is_pid_bigger (ack, t->prev_fc.last_ack_recv))
3434 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3435 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3436 t->prev_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3438 t->prev_fc.last_ack_recv = ack;
3439 peer_unlock_queue (t->prev_hop);
3440 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3443 GNUNET_break_op (0);
3449 * Core handler for mesh network traffic point-to-point ack polls.
3451 * @param cls closure
3452 * @param message message
3453 * @param peer peer identity this notification is about
3455 * @return GNUNET_OK to keep the connection open,
3456 * GNUNET_SYSERR to close it (signal serious error)
3459 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
3460 const struct GNUNET_MessageHeader *message)
3462 struct GNUNET_MESH_Poll *msg;
3463 struct MeshTunnel *t;
3466 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
3469 msg = (struct GNUNET_MESH_Poll *) message;
3471 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3475 /* TODO notify that we dont know this tunnel (whom)? */
3476 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
3477 GNUNET_break_op (0);
3481 /* Is this a forward or backward ACK? */
3482 id = GNUNET_PEER_search(peer);
3483 if (t->next_hop == id)
3485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
3486 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3488 else if (t->prev_hop == id)
3490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
3491 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3500 * Core handler for path ACKs
3502 * @param cls closure
3503 * @param message message
3504 * @param peer peer identity this notification is about
3506 * @return GNUNET_OK to keep the connection open,
3507 * GNUNET_SYSERR to close it (signal serious error)
3510 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3511 const struct GNUNET_MessageHeader *message)
3513 struct GNUNET_MESH_PathACK *msg;
3514 struct MeshPeerInfo *peer_info;
3515 struct MeshPeerPath *p;
3516 struct MeshTunnel *t;
3518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3519 GNUNET_i2s (&my_full_id));
3520 msg = (struct GNUNET_MESH_PathACK *) message;
3521 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3524 /* TODO notify that we don't know the tunnel */
3525 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3527 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3531 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3533 peer_info = peer_get (&msg->peer_id);
3534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3535 GNUNET_i2s (&msg->peer_id));
3536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3539 /* Add path to peers? */
3543 path_add_to_peers (p, GNUNET_YES);
3549 t->state = MESH_TUNNEL_READY;
3550 t->next_fc.last_ack_recv = ntohl (msg->ack);
3551 t->prev_fc.last_ack_sent = ntohl (msg->ack);
3553 /* Message for us? */
3554 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3557 if (NULL == t->owner)
3559 GNUNET_break_op (0);
3562 if (NULL != peer_info->dhtget)
3564 GNUNET_DHT_get_stop (peer_info->dhtget);
3565 peer_info->dhtget = NULL;
3567 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3571 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3572 " not for us, retransmitting...\n");
3573 peer_info = peer_get (&msg->oid);
3574 send_prebuilt_message (message, t->prev_hop, t);
3580 * Core handler for mesh keepalives.
3582 * @param cls closure
3583 * @param message message
3584 * @param peer peer identity this notification is about
3585 * @return GNUNET_OK to keep the connection open,
3586 * GNUNET_SYSERR to close it (signal serious error)
3588 * TODO: Check who we got this from, to validate route.
3591 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
3592 const struct GNUNET_MessageHeader *message)
3594 struct GNUNET_MESH_TunnelKeepAlive *msg;
3595 struct MeshTunnel *t;
3597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
3600 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
3601 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3605 /* TODO notify that we dont know that tunnel */
3606 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
3611 tunnel_reset_timeout (t);
3613 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
3614 send_prebuilt_message (message, t->next_hop, t);
3621 * Functions to handle messages from core
3623 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3624 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3625 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3626 sizeof (struct GNUNET_MESH_PathBroken)},
3627 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
3628 sizeof (struct GNUNET_MESH_TunnelDestroy)},
3629 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3630 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
3631 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
3632 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3633 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
3634 sizeof (struct GNUNET_MESH_ACK)},
3635 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
3636 sizeof (struct GNUNET_MESH_Poll)},
3637 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3638 sizeof (struct GNUNET_MESH_PathACK)},
3644 /******************************************************************************/
3645 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3646 /******************************************************************************/
3651 * notify_client_connection_failure: notify a client that the connection to the
3652 * requested remote peer is not possible (for instance, no route found)
3653 * Function called when the socket is ready to queue more data. "buf" will be
3654 * NULL and "size" zero if the socket was closed for writing in the meantime.
3656 * @param cls closure
3657 * @param size number of bytes available in buf
3658 * @param buf where the callee should write the message
3659 * @return number of bytes written to buf
3662 notify_client_connection_failure (void *cls, size_t size, void *buf)
3665 struct MeshPeerInfo *peer_info;
3666 struct GNUNET_MESH_PeerControl *msg;
3667 struct GNUNET_PeerIdentity id;
3669 if (0 == size && NULL == buf)
3671 // TODO retry? cancel?
3675 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3676 peer_info = (struct MeshPeerInfo *) cls;
3677 msg = (struct GNUNET_MESH_PeerControl *) buf;
3678 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3679 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3680 // msg->tunnel_id = htonl(peer_info->t->tid);
3681 GNUNET_PEER_resolve (peer_info->id, &id);
3682 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3690 * Send keepalive packets for a tunnel.
3692 * @param cls Closure (tunnel for which to send the keepalive).
3693 * @param tc Notification context.
3696 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3698 struct MeshTunnel *t = cls;
3699 struct GNUNET_MESH_TunnelKeepAlive *msg;
3700 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
3703 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3704 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3705 NULL == t->owner || 0 == t->local_tid || 0 != t->prev_hop)
3710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3711 "sending keepalive for tunnel %d\n", t->id.tid);
3713 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
3714 msg->header.size = htons (size);
3715 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3716 msg->oid = my_full_id;
3717 msg->tid = htonl (t->id.tid);
3718 send_prebuilt_message (&msg->header, t->next_hop, t);
3720 t->maintenance_task =
3721 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3726 * Function to process paths received for a new peer addition. The recorded
3727 * paths form the initial tunnel, which can be optimized later.
3728 * Called on each result obtained for the DHT search.
3730 * @param cls closure
3731 * @param exp when will this value expire
3732 * @param key key of the result
3733 * @param get_path path of the get request
3734 * @param get_path_length lenght of get_path
3735 * @param put_path path of the put request
3736 * @param put_path_length length of the put_path
3737 * @param type type of the result
3738 * @param size number of bytes in data
3739 * @param data pointer to the result data
3742 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3743 const struct GNUNET_HashCode * key,
3744 const struct GNUNET_PeerIdentity *get_path,
3745 unsigned int get_path_length,
3746 const struct GNUNET_PeerIdentity *put_path,
3747 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3748 size_t size, const void *data)
3750 struct MeshPeerInfo *peer = cls;
3751 struct MeshPeerPath *p;
3752 struct GNUNET_PeerIdentity pi;
3755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
3756 GNUNET_PEER_resolve (peer->id, &pi);
3757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
3759 p = path_build_from_dht (get_path, get_path_length,
3760 put_path, put_path_length);
3761 path_add_to_peers (p, GNUNET_NO);
3763 for (i = 0; i < peer->ntunnels; i++)
3765 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
3766 peer_connect (peer, peer->tunnels[i]);
3773 /******************************************************************************/
3774 /********************* MESH LOCAL HANDLES **************************/
3775 /******************************************************************************/
3779 * Handler for client disconnection
3781 * @param cls closure
3782 * @param client identification of the client; NULL
3783 * for the last call when the server is destroyed
3786 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3788 struct MeshClient *c;
3789 struct MeshClient *next;
3791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
3794 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
3801 if (c->handle != client)
3803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
3807 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
3809 GNUNET_SERVER_client_drop (c->handle);
3810 c->shutting_down = GNUNET_YES;
3811 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3812 &tunnel_destroy_iterator, c);
3813 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3814 &tunnel_destroy_iterator, c);
3815 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3816 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3818 if (NULL != c->ports)
3819 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
3821 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
3822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
3824 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
3827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
3833 * Handler for new clients
3835 * @param cls closure
3836 * @param client identification of the client
3837 * @param message the actual message, which includes messages the client wants
3840 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3841 const struct GNUNET_MessageHeader *message)
3843 struct GNUNET_MESH_ClientConnect *cc_msg;
3844 struct MeshClient *c;
3849 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
3851 /* Check data sanity */
3852 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3853 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3854 if (0 != (size % sizeof (uint32_t)))
3857 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3860 size /= sizeof (uint32_t);
3862 /* Create new client structure */
3863 c = GNUNET_malloc (sizeof (struct MeshClient));
3864 c->id = next_client_id++; /* overflow not important: just for debug */
3865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
3866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
3868 GNUNET_SERVER_client_keep (client);
3872 struct GNUNET_HashCode hc;
3874 p = (uint32_t *) &cc_msg[1];
3875 c->ports = GNUNET_CONTAINER_multihashmap_create (size, GNUNET_NO);
3876 for (i = 0; i < size; i++)
3879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
3880 GMC_hash32 (u32, &hc);
3882 /* store in client's hashmap */
3883 GNUNET_CONTAINER_multihashmap_put (c->ports, &hc, c,
3884 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
3885 /* store in global hashmap */
3886 /* FIXME only allow one client to have the port open,
3887 * have a backup hashmap with waiting clients */
3888 GNUNET_CONTAINER_multihashmap_put (ports, &hc, c,
3889 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3893 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
3894 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3895 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3896 GNUNET_SERVER_notification_context_add (nc, client);
3897 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
3899 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
3905 * Handler for requests of new tunnels
3907 * @param cls Closure.
3908 * @param client Identification of the client.
3909 * @param message The actual message.
3912 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3913 const struct GNUNET_MessageHeader *message)
3915 struct GNUNET_MESH_TunnelMessage *t_msg;
3916 struct MeshPeerInfo *peer_info;
3917 struct MeshTunnel *t;
3918 struct MeshClient *c;
3919 MESH_TunnelNumber tid;
3921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
3923 /* Sanity check for client registration */
3924 if (NULL == (c = client_get (client)))
3927 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3932 /* Message sanity check */
3933 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3936 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3940 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
3942 GNUNET_i2s (&t_msg->peer));
3943 /* Sanity check for tunnel numbering */
3944 tid = ntohl (t_msg->tunnel_id);
3945 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3948 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3951 /* Sanity check for duplicate tunnel IDs */
3952 if (NULL != tunnel_get_by_local_id (c, tid))
3955 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3959 while (NULL != tunnel_get_by_pi (myid, next_tid))
3960 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3961 t = tunnel_new (myid, next_tid, c, tid);
3962 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3966 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3969 t->port = ntohl (t_msg->port);
3970 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
3971 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
3973 peer_info = peer_get (&t_msg->peer);
3974 GNUNET_array_append (peer_info->tunnels, peer_info->ntunnels, t);
3975 peer_connect (peer_info, t);
3976 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3982 * Handler for requests of deleting tunnels
3984 * @param cls closure
3985 * @param client identification of the client
3986 * @param message the actual message
3989 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
3990 const struct GNUNET_MessageHeader *message)
3992 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
3993 struct MeshClient *c;
3994 struct MeshTunnel *t;
3995 MESH_TunnelNumber tid;
3997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3998 "Got a DESTROY TUNNEL from client!\n");
4000 /* Sanity check for client registration */
4001 if (NULL == (c = client_get (client)))
4004 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4009 /* Message sanity check */
4010 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4013 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4017 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4019 /* Retrieve tunnel */
4020 tid = ntohl (tunnel_msg->tunnel_id);
4021 t = tunnel_get_by_local_id(c, tid);
4024 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4026 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4031 tunnel_destroy_empty (t);
4032 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4035 send_client_tunnel_destroy (t);
4036 client_delete_tunnel (c, t);
4038 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4040 tunnel_send_destroy (t);
4041 peer_remove_tunnel (peer_get_short(t->dest), t);
4042 t->destroy = GNUNET_YES;
4043 /* The tunnel will be destroyed when the last message is transmitted. */
4044 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4050 * Handler for requests of seeting tunnel's buffering policy.
4052 * @param cls Closure (unused).
4053 * @param client Identification of the client.
4054 * @param message The actual message.
4057 handle_local_tunnel_buffer (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 BUFFER request 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 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4079 /* Retrieve tunnel */
4080 tid = ntohl (tunnel_msg->tunnel_id);
4081 t = tunnel_get_by_local_id(c, tid);
4084 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4086 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4090 switch (ntohs(message->type))
4092 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
4093 t->nobuffer = GNUNET_NO;
4095 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
4096 t->nobuffer = GNUNET_YES;
4102 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4107 * Handler for client traffic directed to one peer
4109 * @param cls closure
4110 * @param client identification of the client
4111 * @param message the actual message
4114 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4115 const struct GNUNET_MessageHeader *message)
4117 struct MeshClient *c;
4118 struct MeshTunnel *t;
4119 struct GNUNET_MESH_Unicast *data_msg;
4120 MESH_TunnelNumber tid;
4123 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4124 "Got a unicast request from a client!\n");
4126 /* Sanity check for client registration */
4127 if (NULL == (c = client_get (client)))
4130 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4135 data_msg = (struct GNUNET_MESH_Unicast *) message;
4137 /* Sanity check for message size */
4138 size = ntohs (message->size);
4139 if (sizeof (struct GNUNET_MESH_Unicast) +
4140 sizeof (struct GNUNET_MessageHeader) > size)
4143 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4147 /* Tunnel exists? */
4148 tid = ntohl (data_msg->tid);
4149 t = tunnel_get_by_local_id (c, tid);
4153 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4157 /* Is it a local tunnel? Then, does client own the tunnel? */
4158 if (t->owner->handle != client)
4161 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4165 /* PID should be as expected: client<->service communication */
4166 if (ntohl (data_msg->pid) != t->prev_fc.last_pid_recv + 1)
4169 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4170 "Unicast PID, expected %u, got %u\n",
4171 t->prev_fc.last_pid_recv + 1, ntohl (data_msg->pid));
4172 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4176 /* Ok, everything is correct, send the message
4177 * (pretend we got it from a mesh peer)
4180 /* Work around const limitation */
4181 char buf[ntohs (message->size)] GNUNET_ALIGN;
4182 struct GNUNET_MESH_Unicast *copy;
4184 copy = (struct GNUNET_MESH_Unicast *) buf;
4185 memcpy (buf, data_msg, size);
4186 copy->oid = my_full_id;
4187 copy->tid = htonl (t->id.tid);
4188 copy->ttl = htonl (default_ttl);
4189 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4190 " calling generic handler...\n");
4191 handle_mesh_unicast (NULL, &my_full_id, ©->header);
4193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4194 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4201 * Handler for client traffic directed to the origin
4203 * @param cls closure
4204 * @param client identification of the client
4205 * @param message the actual message
4208 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4209 const struct GNUNET_MessageHeader *message)
4211 struct GNUNET_MESH_ToOrigin *data_msg;
4212 struct MeshFlowControl *fc;
4213 struct MeshClient *c;
4214 struct MeshTunnel *t;
4215 MESH_TunnelNumber tid;
4218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4219 "Got a ToOrigin request from a client!\n");
4220 /* Sanity check for client registration */
4221 if (NULL == (c = client_get (client)))
4224 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4227 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4229 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4231 /* Sanity check for message size */
4232 size = ntohs (message->size);
4233 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4234 sizeof (struct GNUNET_MessageHeader) > size)
4237 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4241 /* Tunnel exists? */
4242 tid = ntohl (data_msg->tid);
4243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4244 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4247 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4250 t = tunnel_get_by_local_id (c, tid);
4253 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4254 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4256 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4260 /* It should be sent by someone who has this as incoming tunnel. */
4264 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4268 /* PID should be as expected */
4270 if (ntohl (data_msg->pid) != fc->last_pid_recv + 1)
4273 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4274 "To Origin PID, expected %u, got %u\n",
4275 fc->last_pid_recv + 1,
4276 ntohl (data_msg->pid));
4277 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4281 /* Ok, everything is correct, send the message
4282 * (pretend we got it from a mesh peer)
4285 char buf[ntohs (message->size)] GNUNET_ALIGN;
4286 struct GNUNET_MESH_ToOrigin *copy;
4288 /* Work around 'const' limitation */
4289 memcpy (buf, data_msg, size);
4290 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4291 GNUNET_PEER_resolve (t->id.oid, ©->oid);
4292 copy->tid = htonl (t->id.tid);
4293 copy->ttl = htonl (default_ttl);
4295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4296 " calling generic handler...\n");
4297 handle_mesh_to_orig (NULL, &my_full_id, ©->header);
4299 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4306 * Handler for client's ACKs for payload traffic.
4308 * @param cls Closure (unused).
4309 * @param client Identification of the client.
4310 * @param message The actual message.
4313 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
4314 const struct GNUNET_MessageHeader *message)
4316 struct GNUNET_MESH_LocalAck *msg;
4317 struct MeshTunnel *t;
4318 struct MeshClient *c;
4319 MESH_TunnelNumber tid;
4322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
4323 /* Sanity check for client registration */
4324 if (NULL == (c = client_get (client)))
4327 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4332 msg = (struct GNUNET_MESH_LocalAck *) message;
4334 /* Tunnel exists? */
4335 tid = ntohl (msg->tunnel_id);
4336 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4337 t = tunnel_get_by_local_id (c, tid);
4341 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4342 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4343 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4347 ack = ntohl (msg->max_pid);
4348 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
4350 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
4353 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
4354 t->prev_fc.last_ack_recv = ack;
4355 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4359 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
4360 t->next_fc.last_ack_recv = ack;
4361 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4364 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4372 * Iterator over all tunnels to send a monitoring client info about each tunnel.
4374 * @param cls Closure (client handle).
4375 * @param key Key (hashed tunnel ID, unused).
4376 * @param value Tunnel info.
4378 * @return GNUNET_YES, to keep iterating.
4381 monitor_all_tunnels_iterator (void *cls,
4382 const struct GNUNET_HashCode * key,
4385 struct GNUNET_SERVER_Client *client = cls;
4386 struct MeshTunnel *t = value;
4387 struct GNUNET_MESH_LocalMonitor *msg;
4389 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
4390 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
4391 msg->tunnel_id = htonl (t->id.tid);
4392 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4393 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
4394 GNUNET_PEER_resolve (t->dest, &msg->destination);
4396 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4397 "* sending info about tunnel %s [%u]\n",
4398 GNUNET_i2s (&msg->owner), t->id.tid);
4400 GNUNET_SERVER_notification_context_unicast (nc, client,
4401 &msg->header, GNUNET_NO);
4407 * Handler for client's MONITOR request.
4409 * @param cls Closure (unused).
4410 * @param client Identification of the client.
4411 * @param message The actual message.
4414 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
4415 const struct GNUNET_MessageHeader *message)
4417 struct MeshClient *c;
4419 /* Sanity check for client registration */
4420 if (NULL == (c = client_get (client)))
4423 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4427 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4428 "Received get tunnels request from client %u\n",
4430 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
4431 monitor_all_tunnels_iterator,
4433 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4434 "Get tunnels request from client %u completed\n",
4436 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4441 * Handler for client's MONITOR_TUNNEL request.
4443 * @param cls Closure (unused).
4444 * @param client Identification of the client.
4445 * @param message The actual message.
4448 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
4449 const struct GNUNET_MessageHeader *message)
4451 const struct GNUNET_MESH_LocalMonitor *msg;
4452 struct GNUNET_MESH_LocalMonitor *resp;
4453 struct MeshClient *c;
4454 struct MeshTunnel *t;
4456 /* Sanity check for client registration */
4457 if (NULL == (c = client_get (client)))
4460 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4464 msg = (struct GNUNET_MESH_LocalMonitor *) message;
4465 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4466 "Received tunnel info request from client %u for tunnel %s[%X]\n",
4469 ntohl (msg->tunnel_id));
4470 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
4473 /* We don't know the tunnel FIXME */
4474 struct GNUNET_MESH_LocalMonitor warn;
4477 GNUNET_SERVER_notification_context_unicast (nc, client,
4480 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4484 /* Initialize context */
4485 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
4487 GNUNET_PEER_resolve (t->dest, &resp->destination);
4488 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4489 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
4490 &resp->header, GNUNET_NO);
4493 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4494 "Monitor tunnel request from client %u completed\n",
4496 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4501 * Functions to handle messages from clients
4503 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4504 {&handle_local_new_client, NULL,
4505 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4506 {&handle_local_tunnel_create, NULL,
4507 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4508 sizeof (struct GNUNET_MESH_TunnelMessage)},
4509 {&handle_local_tunnel_destroy, NULL,
4510 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4511 sizeof (struct GNUNET_MESH_TunnelMessage)},
4512 {&handle_local_tunnel_buffer, NULL,
4513 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
4514 sizeof (struct GNUNET_MESH_TunnelMessage)},
4515 {&handle_local_tunnel_buffer, NULL,
4516 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
4517 sizeof (struct GNUNET_MESH_TunnelMessage)},
4518 {&handle_local_unicast, NULL,
4519 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4520 {&handle_local_to_origin, NULL,
4521 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4522 {&handle_local_ack, NULL,
4523 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
4524 sizeof (struct GNUNET_MESH_LocalAck)},
4525 {&handle_local_get_tunnels, NULL,
4526 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
4527 sizeof (struct GNUNET_MessageHeader)},
4528 {&handle_local_show_tunnel, NULL,
4529 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
4530 sizeof (struct GNUNET_MESH_LocalMonitor)},
4536 * Method called whenever a given peer connects.
4538 * @param cls closure
4539 * @param peer peer identity this notification is about
4542 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
4544 struct MeshPeerInfo *peer_info;
4545 struct MeshPeerPath *path;
4547 DEBUG_CONN ("Peer connected\n");
4548 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
4549 peer_info = peer_get (peer);
4550 if (myid == peer_info->id)
4552 DEBUG_CONN (" (self)\n");
4557 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
4559 path = path_new (2);
4560 path->peers[0] = myid;
4561 path->peers[1] = peer_info->id;
4562 GNUNET_PEER_change_rc (myid, 1);
4563 GNUNET_PEER_change_rc (peer_info->id, 1);
4564 peer_info_add_path (peer_info, path, GNUNET_YES);
4565 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
4571 * Method called whenever a peer disconnects.
4573 * @param cls closure
4574 * @param peer peer identity this notification is about
4577 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4579 struct MeshPeerInfo *pi;
4580 struct MeshPeerQueue *q;
4581 struct MeshPeerQueue *n;
4583 DEBUG_CONN ("Peer disconnected\n");
4584 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4594 /* TODO try to reroute this traffic instead */
4595 queue_destroy(q, GNUNET_YES);
4598 if (NULL != pi->core_transmit)
4600 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
4601 pi->core_transmit = NULL;
4603 peer_remove_path (pi, pi->id, myid);
4606 DEBUG_CONN (" (self)\n");
4608 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
4614 * To be called on core init/fail.
4616 * @param cls Closure (config)
4617 * @param server handle to the server for this service
4618 * @param identity the public identity of this peer
4621 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4622 const struct GNUNET_PeerIdentity *identity)
4624 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4627 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
4628 core_handle = server;
4629 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4632 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
4633 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4635 GNUNET_i2s (identity));
4636 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4638 GNUNET_i2s (&my_full_id));
4639 GNUNET_CORE_disconnect (core_handle);
4640 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4641 NULL, /* Closure passed to MESH functions */
4642 &core_init, /* Call core_init once connected */
4643 &core_connect, /* Handle connects */
4644 &core_disconnect, /* remove peers on disconnects */
4645 NULL, /* Don't notify about all incoming messages */
4646 GNUNET_NO, /* For header only in notification */
4647 NULL, /* Don't notify about all outbound messages */
4648 GNUNET_NO, /* For header-only out notification */
4649 core_handlers); /* Register these handlers */
4657 /******************************************************************************/
4658 /************************ MAIN FUNCTIONS ****************************/
4659 /******************************************************************************/
4662 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4664 * @param cls closure
4665 * @param key current key code
4666 * @param value value in the hash map
4667 * @return GNUNET_YES if we should continue to iterate,
4671 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
4673 struct MeshTunnel *t = value;
4680 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4682 * @param cls closure
4683 * @param key current key code
4684 * @param value value in the hash map
4685 * @return GNUNET_YES if we should continue to iterate,
4689 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
4691 struct MeshPeerInfo *p = value;
4692 struct MeshPeerQueue *q;
4693 struct MeshPeerQueue *n;
4701 queue_destroy(q, GNUNET_YES);
4705 peer_info_destroy (p);
4711 * Task run during shutdown.
4717 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
4721 if (core_handle != NULL)
4723 GNUNET_CORE_disconnect (core_handle);
4728 GNUNET_CRYPTO_ecc_key_create_stop (keygen);
4731 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4732 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4733 if (dht_handle != NULL)
4735 GNUNET_DHT_disconnect (dht_handle);
4740 GNUNET_SERVER_notification_context_destroy (nc);
4743 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4745 GNUNET_SCHEDULER_cancel (announce_id_task);
4746 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
4753 * Callback for hostkey read/generation.
4755 * @param cls Closure (Configuration handle).
4756 * @param pk The ECC private key.
4757 * @param emsg Error message, if any.
4760 key_generation_cb (void *cls,
4761 struct GNUNET_CRYPTO_EccPrivateKey *pk,
4764 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4765 struct MeshPeerInfo *peer;
4766 struct MeshPeerPath *p;
4771 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4772 _("Mesh service could not access hostkey: %s. Exiting.\n"),
4774 GNUNET_SCHEDULER_shutdown ();
4777 my_private_key = pk;
4778 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
4779 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4780 &my_full_id.hashPubKey);
4781 myid = GNUNET_PEER_intern (&my_full_id);
4782 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4783 "Mesh for peer [%s] starting\n",
4784 GNUNET_i2s(&my_full_id));
4786 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4787 NULL, /* Closure passed to MESH functions */
4788 &core_init, /* Call core_init once connected */
4789 &core_connect, /* Handle connects */
4790 &core_disconnect, /* remove peers on disconnects */
4791 NULL, /* Don't notify about all incoming messages */
4792 GNUNET_NO, /* For header only in notification */
4793 NULL, /* Don't notify about all outbound messages */
4794 GNUNET_NO, /* For header-only out notification */
4795 core_handlers); /* Register these handlers */
4796 if (core_handle == NULL)
4799 GNUNET_SCHEDULER_shutdown ();
4804 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4807 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4808 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
4809 GNUNET_SERVER_disconnect_notify (server_handle,
4810 &handle_local_client_disconnect, NULL);
4813 clients_head = NULL;
4814 clients_tail = NULL;
4817 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4819 /* Create a peer_info for the local peer */
4820 peer = peer_get (&my_full_id);
4823 GNUNET_PEER_change_rc (myid, 1);
4824 peer_info_add_path (peer, p, GNUNET_YES);
4825 GNUNET_SERVER_resume (server_handle);
4826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
4831 * Process mesh requests.
4833 * @param cls closure
4834 * @param server the initialized server
4835 * @param c configuration to use
4838 run (void *cls, struct GNUNET_SERVER_Handle *server,
4839 const struct GNUNET_CONFIGURATION_Handle *c)
4843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
4844 server_handle = server;
4847 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
4850 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4852 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4853 "mesh", "peer/privatekey");
4854 GNUNET_SCHEDULER_shutdown ();
4859 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
4860 &refresh_path_time))
4862 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4864 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4865 "mesh", "refresh path time");
4866 GNUNET_SCHEDULER_shutdown ();
4871 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
4874 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4876 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4877 "mesh", "id announce time");
4878 GNUNET_SCHEDULER_shutdown ();
4883 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
4886 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4888 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4889 "mesh", "connect timeout");
4890 GNUNET_SCHEDULER_shutdown ();
4895 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
4898 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4900 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4901 "mesh", "max msgs queue");
4902 GNUNET_SCHEDULER_shutdown ();
4907 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
4910 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4912 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4913 "mesh", "max tunnels");
4914 GNUNET_SCHEDULER_shutdown ();
4919 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
4922 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4924 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4925 "mesh", "default ttl", 64);
4930 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
4933 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4934 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4935 "mesh", "max peers", 1000);
4940 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
4941 &dht_replication_level))
4943 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4945 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4946 "mesh", "dht replication level", 3);
4947 dht_replication_level = 3;
4950 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4951 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4952 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4953 ports = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4955 dht_handle = GNUNET_DHT_connect (c, 64);
4956 if (NULL == dht_handle)
4960 stats = GNUNET_STATISTICS_create ("mesh", c);
4962 GNUNET_SERVER_suspend (server_handle);
4963 /* Scheduled the task to clean up when shutdown is called */
4964 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4966 keygen = GNUNET_CRYPTO_ecc_key_create_start (keyfile,
4969 GNUNET_free (keyfile);
4974 * The main function for the mesh service.
4976 * @param argc number of arguments from the command line
4977 * @param argv command line arguments
4978 * @return 0 ok, 1 on error
4981 main (int argc, char *const *argv)
4986 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
4987 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
4989 ret = (GNUNET_OK == r) ? 0 : 1;
4990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
4994 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4995 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
4996 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);