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 * Path will be either used or freed.
1492 * @param trusted Do we trust that this path is real?
1495 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1496 struct MeshPeerPath *path, int trusted)
1499 peer_info_add_path (peer_info, path, trusted);
1504 * Function called if the connection to the peer has been stalled for a while,
1505 * possibly due to a missed ACK. Poll the peer about its ACK status.
1507 * @param cls Closure (poll ctx).
1508 * @param tc TaskContext.
1511 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1513 struct MeshFlowControl *fc = cls;
1514 struct GNUNET_MESH_Poll msg;
1515 struct MeshTunnel *t = fc->t;
1516 GNUNET_PEER_Id peer;
1518 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1519 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1524 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
1525 msg.header.size = htons (sizeof (msg));
1526 msg.tid = htonl (t->id.tid);
1527 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1529 if (fc == &t->prev_fc)
1533 else if (fc == &t->next_fc)
1542 send_prebuilt_message (&msg.header, peer, t);
1543 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
1544 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
1550 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1551 * to obtain a local peer -> destination path and interning the peer ids.
1553 * @return Newly allocated and created path
1555 static struct MeshPeerPath *
1556 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1557 unsigned int get_path_length,
1558 const struct GNUNET_PeerIdentity *put_path,
1559 unsigned int put_path_length)
1561 struct MeshPeerPath *p;
1567 GNUNET_PEER_change_rc (myid, 1);
1568 i = get_path_length;
1569 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1570 for (i--; i >= 0; i--)
1572 id = GNUNET_PEER_intern (&get_path[i]);
1573 if (p->length > 0 && id == p->peers[p->length - 1])
1575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1576 GNUNET_PEER_change_rc (id, -1);
1580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1581 GNUNET_i2s (&get_path[i]));
1583 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1584 p->peers[p->length - 1] = id;
1587 i = put_path_length;
1588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1589 for (i--; i >= 0; i--)
1591 id = GNUNET_PEER_intern (&put_path[i]);
1594 /* PUT path went through us, so discard the path up until now and start
1595 * from here to get a much shorter (and loop-free) path.
1600 if (p->length > 0 && id == p->peers[p->length - 1])
1602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1603 GNUNET_PEER_change_rc (id, -1);
1607 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1608 GNUNET_i2s (&put_path[i]));
1610 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1611 p->peers[p->length - 1] = id;
1615 if (get_path_length > 0)
1616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1617 GNUNET_i2s (&get_path[0]));
1618 if (put_path_length > 0)
1619 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1620 GNUNET_i2s (&put_path[0]));
1621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1623 for (i = 0; i < p->length; i++)
1625 struct GNUNET_PeerIdentity peer_id;
1627 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1628 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1629 GNUNET_i2s (&peer_id));
1637 * Adds a path to the peer_infos of all the peers in the path
1639 * @param p Path to process.
1640 * @param confirmed Whether we know if the path works or not.
1643 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1647 /* TODO: invert and add */
1648 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1649 for (i++; i < p->length; i++)
1651 struct MeshPeerInfo *aux;
1652 struct MeshPeerPath *copy;
1654 aux = peer_get_short (p->peers[i]);
1655 copy = path_duplicate (p);
1656 copy->length = i + 1;
1657 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
1663 * Send keepalive packets for a peer
1665 * @param cls Closure (tunnel for which to send the keepalive).
1666 * @param tc Notification context.
1669 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1673 * Search for a tunnel among the incoming tunnels
1675 * @param tid the local id of the tunnel
1677 * @return tunnel handler, NULL if doesn't exist
1679 static struct MeshTunnel *
1680 tunnel_get_incoming (MESH_TunnelNumber tid)
1682 struct GNUNET_HashCode hash;
1684 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1685 GMC_hash32 (tid, &hash);
1686 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1691 * Search for a tunnel among the tunnels for a client
1693 * @param c the client whose tunnels to search in
1694 * @param tid the local id of the tunnel
1696 * @return tunnel handler, NULL if doesn't exist
1698 static struct MeshTunnel *
1699 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1701 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1703 return tunnel_get_incoming (tid);
1707 struct GNUNET_HashCode hash;
1709 GMC_hash32 (tid, &hash);
1710 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
1716 * Search for a tunnel by global ID using PEER_ID
1718 * @param pi owner of the tunnel
1719 * @param tid global tunnel number
1721 * @return tunnel handler, NULL if doesn't exist
1723 static struct MeshTunnel *
1724 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1726 struct MESH_TunnelID id;
1727 struct GNUNET_HashCode hash;
1732 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1733 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1738 * Search for a tunnel by global ID using full PeerIdentities
1740 * @param oid owner of the tunnel
1741 * @param tid global tunnel number
1743 * @return tunnel handler, NULL if doesn't exist
1745 static struct MeshTunnel *
1746 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1748 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1753 * Add a client to a tunnel, initializing all needed data structures.
1755 * @param t Tunnel to which add the client.
1756 * @param c Client which to add to the tunnel.
1759 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
1761 struct GNUNET_HashCode hash;
1763 if (NULL != t->client)
1768 if (0 != t->next_hop)
1773 GMC_hash32 (t->local_tid_dest, &hash);
1775 GNUNET_CONTAINER_multihashmap_put (c->incoming_tunnels, &hash, t,
1776 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1782 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
1783 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1793 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1795 unsigned int own_pos;
1797 for (own_pos = 0; own_pos < p->length; own_pos++)
1799 if (p->peers[own_pos] == myid)
1802 if (own_pos > p->length - 1)
1808 if (own_pos < p->length - 1)
1809 t->next_hop = p->peers[own_pos + 1];
1811 t->next_hop = p->peers[own_pos];
1812 GNUNET_PEER_change_rc (t->next_hop, 1);
1814 t->prev_hop = p->peers[own_pos - 1];
1816 t->prev_hop = p->peers[0];
1817 GNUNET_PEER_change_rc (t->prev_hop, 1);
1819 if (NULL != t->path)
1820 path_destroy (t->path);
1821 t->path = path_duplicate (p);
1824 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
1825 GNUNET_SCHEDULER_cancel (t->maintenance_task);
1826 t->maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
1833 * Notifies a tunnel that a connection has broken that affects at least
1834 * some of its peers. Sends a notification towards the root of the tree.
1835 * In case the peer is the owner of the tree, notifies the client that owns
1836 * the tunnel and tries to reconnect.
1838 * @param t Tunnel affected.
1839 * @param p1 Peer that got disconnected from p2.
1840 * @param p2 Peer that got disconnected from p1.
1842 * @return Short ID of the peer disconnected (either p1 or p2).
1843 * 0 if the tunnel remained unaffected.
1845 static GNUNET_PEER_Id
1846 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1849 // if (myid != p1 && myid != p2) FIXME
1854 // if (tree_get_predecessor (t->tree) != 0)
1856 // /* We are the peer still connected, notify owner of the disconnection. */
1857 // struct GNUNET_MESH_PathBroken msg;
1858 // struct GNUNET_PeerIdentity neighbor;
1860 // msg.header.size = htons (sizeof (msg));
1861 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1862 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1863 // msg.tid = htonl (t->id.tid);
1864 // msg.peer1 = my_full_id;
1865 // GNUNET_PEER_resolve (pid, &msg.peer2);
1866 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
1867 // send_prebuilt_message (&msg.header, &neighbor, t);
1874 * Build a local ACK message and send it to a local client.
1876 * @param t Tunnel on which to send the ACK.
1877 * @param c Client to whom send the ACK.
1878 * @param ack Value of the ACK.
1881 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
1883 struct GNUNET_MESH_LocalAck msg;
1885 msg.header.size = htons (sizeof (msg));
1886 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1887 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
1888 msg.max_pid = htonl (ack);
1889 GNUNET_SERVER_notification_context_unicast(nc,
1896 * Build an ACK message and queue it to send to the given peer.
1898 * @param t Tunnel on which to send the ACK.
1899 * @param peer Peer to whom send the ACK.
1900 * @param ack Value of the ACK.
1903 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
1905 struct GNUNET_MESH_ACK msg;
1907 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1908 msg.header.size = htons (sizeof (msg));
1909 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
1910 msg.pid = htonl (ack);
1911 msg.tid = htonl (t->id.tid);
1913 send_prebuilt_message (&msg.header, peer, t);
1918 * Send an ACK informing the predecessor about the available buffer space.
1919 * In case there is no predecessor, inform the owning client.
1920 * If buffering is off, send only on behalf of children or self if endpoint.
1921 * If buffering is on, send when sent to children and buffer space is free.
1922 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
1923 * the ACK itself goes "back" (towards root).
1925 * @param t Tunnel on which to send the ACK.
1926 * @param type Type of message that triggered the ACK transmission.
1929 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
1933 /* Is it after unicast retransmission? */
1936 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1937 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1938 "ACK due to FWD DATA retransmission\n");
1939 if (GNUNET_YES == t->nobuffer)
1941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
1945 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1946 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
1948 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1949 t->force_ack = GNUNET_YES;
1955 /* Check if we need to transmit the ACK */
1956 if (t->queue_max > t->next_fc.queue_n * 4 &&
1957 GMC_is_pid_bigger(t->prev_fc.last_ack_sent, t->prev_fc.last_pid_recv) &&
1958 GNUNET_NO == t->force_ack)
1960 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
1961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1962 " t->qmax: %u, t->qn: %u\n",
1963 t->queue_max, t->next_fc.queue_n);
1964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1965 " t->pid: %u, t->ack: %u\n",
1966 t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent);
1970 /* Ok, ACK might be necessary, what PID to ACK? */
1971 ack = t->prev_fc.last_pid_recv + t->queue_max - t->next_fc.queue_n;
1972 if (ack == t->prev_fc.last_ack_sent && GNUNET_NO == t->force_ack)
1974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
1978 t->prev_fc.last_ack_sent = ack;
1979 if (NULL != t->owner)
1980 send_local_ack (t, t->owner, ack);
1981 else if (0 != t->prev_hop)
1982 send_ack (t, t->prev_hop, ack);
1986 t->force_ack = GNUNET_NO;
1991 * Send an ACK informing the children node/client about the available
1993 * If buffering is off, send only on behalf of root (can be self).
1994 * If buffering is on, send when sent to predecessor and buffer space is free.
1995 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
1996 * the ACK itself goes "forward" (towards children/clients).
1998 * @param t Tunnel on which to send the ACK.
1999 * @param type Type of message that triggered the ACK transmission.
2002 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
2005 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2006 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
2007 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
2008 /* Is it after data to_origin retransmission? */
2011 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2012 if (GNUNET_YES == t->nobuffer)
2014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2015 " Not sending ACK, nobuffer + traffic\n");
2019 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2020 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2022 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2023 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2024 t->force_ack = GNUNET_YES;
2030 /* TODO: Check if we need to transmit the ACK (as in fwd) */
2032 ack = t->next_fc.last_pid_recv + t->queue_max - t->prev_fc.queue_n;
2034 if (t->next_fc.last_ack_sent == ack && GNUNET_NO == t->force_ack)
2036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2037 " Not sending ACK, not needed\n");
2040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2041 " Sending BCK ACK %u (last sent: %u)\n",
2042 ack, t->next_fc.last_ack_sent);
2043 t->next_fc.last_ack_sent = ack;
2045 if (NULL != t->client)
2046 send_local_ack (t, t->client, ack);
2047 else if (0 != t->next_hop)
2048 send_ack (t, t->next_hop, ack);
2051 t->force_ack = GNUNET_NO;
2056 * @brief Re-initiate traffic to this peer if necessary.
2058 * Check if there is traffic queued towards this peer
2059 * and the core transmit handle is NULL (traffic was stalled).
2060 * If so, call core tmt rdy.
2062 * @param peer_id Short ID of peer to which initiate traffic.
2065 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2067 struct MeshPeerInfo *peer;
2068 struct GNUNET_PeerIdentity id;
2069 struct MeshPeerQueue *q;
2072 peer = peer_get_short (peer_id);
2073 if (NULL != peer->core_transmit)
2076 q = queue_get_next (peer);
2079 /* Might br multicast traffic already sent to this particular peer but
2080 * not to other children in this tunnel.
2081 * This way t->queue_n would be > 0 but the queue of this particular peer
2087 GNUNET_PEER_resolve (peer->id, &id);
2088 peer->core_transmit =
2089 GNUNET_CORE_notify_transmit_ready(core_handle,
2092 GNUNET_TIME_UNIT_FOREVER_REL,
2102 * Send a message to all peers in this tunnel that the tunnel is no longer
2105 * @param t The tunnel whose peers to notify.
2108 tunnel_send_destroy (struct MeshTunnel *t)
2110 struct GNUNET_MESH_TunnelDestroy msg;
2111 struct GNUNET_PeerIdentity id;
2113 msg.header.size = htons (sizeof (msg));
2114 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2115 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2116 msg.tid = htonl (t->id.tid);
2117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2118 " sending tunnel destroy for tunnel: %s [%X]\n",
2119 GNUNET_i2s (&msg.oid), t->id.tid);
2121 if (NULL == t->client && 0 != t->next_hop)
2123 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2124 GNUNET_PEER_resolve (t->next_hop, &id);
2125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2126 " sending forward to %s\n",
2128 send_prebuilt_message (&msg.header, t->next_hop, t);
2130 if (NULL == t->owner && 0 != t->prev_hop)
2132 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2133 GNUNET_PEER_resolve (t->prev_hop, &id);
2134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2135 " sending back to %s\n",
2137 send_prebuilt_message (&msg.header, t->prev_hop, t);
2143 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2145 * @param t Tunnel which to cancel.
2146 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2149 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2151 struct MeshPeerInfo *peer_info;
2152 struct MeshPeerQueue *pq;
2153 struct MeshPeerQueue *next;
2155 peer_info = peer_get_short (neighbor);
2156 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2159 if (pq->tunnel == t)
2161 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2162 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2164 /* Should have been removed on destroy children */
2167 queue_destroy (pq, GNUNET_YES);
2170 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2172 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2173 peer_info->core_transmit = NULL;
2179 * Destroy the tunnel and free any allocated resources linked to it.
2181 * @param t the tunnel to destroy
2183 * @return GNUNET_OK on success
2186 tunnel_destroy (struct MeshTunnel *t)
2188 struct MeshClient *c;
2189 struct GNUNET_HashCode hash;
2199 struct GNUNET_PeerIdentity id;
2201 GNUNET_PEER_resolve (t->id.oid, &id);
2202 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2203 GNUNET_i2s (&id), t->id.tid);
2205 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2209 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2210 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2218 GMC_hash32 (t->local_tid, &hash);
2220 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2227 if (NULL != t->client)
2230 GMC_hash32 (t->local_tid_dest, &hash);
2232 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2238 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2245 peer_cancel_queues (t->next_hop, t);
2246 peer_cancel_queues (t->prev_hop, t);
2247 GNUNET_PEER_change_rc(t->next_hop, -1);
2248 GNUNET_PEER_change_rc(t->prev_hop, -1);
2250 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2251 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2254 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2260 * Tunnel is empty: destroy it.
2262 * @param t Tunnel to destroy.
2265 tunnel_destroy_empty (struct MeshTunnel *t)
2269 struct GNUNET_PeerIdentity id;
2271 GNUNET_PEER_resolve (t->id.oid, &id);
2272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2273 "executing destruction of empty tunnel %s [%X]\n",
2274 GNUNET_i2s (&id), t->id.tid);
2278 if (GNUNET_NO == t->destroy)
2279 tunnel_send_destroy (t);
2280 if (0 == t->pending_messages)
2283 t->destroy = GNUNET_YES;
2287 * Initialize a Flow Control structure to the initial state.
2289 * @param fc Flow Control structure to initialize.
2292 fc_init (struct MeshFlowControl *fc)
2294 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2295 fc->last_pid_recv = (uint32_t) -1;
2296 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
2297 fc->last_ack_recv = (uint32_t) -1;
2298 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2299 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2304 * Create a new tunnel
2306 * @param owner Who is the owner of the tunnel (short ID).
2307 * @param tid Tunnel Number of the tunnel.
2308 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2309 * @param local Tunnel Number for the tunnel, for the client point of view.
2311 * @return A new initialized tunnel. NULL on error.
2313 static struct MeshTunnel *
2314 tunnel_new (GNUNET_PEER_Id owner,
2315 MESH_TunnelNumber tid,
2316 struct MeshClient *client,
2317 MESH_TunnelNumber local)
2319 struct MeshTunnel *t;
2320 struct GNUNET_HashCode hash;
2322 if (n_tunnels >= max_tunnels && NULL == client)
2325 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2328 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2330 fc_init (&t->next_fc);
2331 fc_init (&t->prev_fc);
2332 t->local_tid = local;
2334 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2336 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2338 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2339 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2346 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2353 GMC_hash32 (t->local_tid, &hash);
2355 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
2356 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2360 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2371 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2372 * client when the client disconnects. If the client is not the owner, the
2373 * owner will get notified if no more clients are in the tunnel and the client
2374 * get removed from the tunnel's list.
2376 * @param cls closure (client that is disconnecting)
2377 * @param key the hash of the local tunnel id (used to access the hashmap)
2378 * @param value the value stored at the key (tunnel to destroy)
2380 * @return GNUNET_OK, keep iterating.
2383 tunnel_destroy_iterator (void *cls,
2384 const struct GNUNET_HashCode * key,
2387 struct MeshTunnel *t = value;
2388 struct MeshClient *c = cls;
2390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2391 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
2392 t->local_tid, t->local_tid_dest, c->id);
2393 if (GNUNET_NO == c->shutting_down)
2394 send_client_tunnel_destroy (t);
2395 client_delete_tunnel (c, t);
2398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
2402 else if (c == t->owner)
2404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
2412 tunnel_destroy_empty (t);
2419 * Timeout function, destroys tunnel if called
2421 * @param cls Closure (tunnel to destroy).
2422 * @param tc TaskContext
2425 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2427 struct MeshTunnel *t = cls;
2428 struct GNUNET_PeerIdentity id;
2430 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2431 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2433 GNUNET_PEER_resolve(t->id.oid, &id);
2434 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2435 "Tunnel %s [%X] timed out. Destroying.\n",
2436 GNUNET_i2s(&id), t->id.tid);
2437 send_client_tunnel_destroy (t);
2443 * Resets the tunnel timeout. Starts it if no timeout was running.
2445 * @param t Tunnel whose timeout to reset.
2447 * TODO use heap to improve efficiency of scheduler.
2450 tunnel_reset_timeout (struct MeshTunnel *t)
2452 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
2454 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2455 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2456 t->maintenance_task =
2457 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2458 (refresh_path_time, 4), &tunnel_timeout, t);
2462 /******************************************************************************/
2463 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2464 /******************************************************************************/
2467 * Function to send a create path packet to a peer.
2469 * @param cls closure
2470 * @param size number of bytes available in buf
2471 * @param buf where the callee should write the message
2472 * @return number of bytes written to buf
2475 send_core_path_create (void *cls, size_t size, void *buf)
2477 struct MeshTunnel *t = cls;
2478 struct GNUNET_MESH_CreateTunnel *msg;
2479 struct GNUNET_PeerIdentity *peer_ptr;
2480 struct MeshPeerPath *p = t->path;
2485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
2487 sizeof (struct GNUNET_MESH_CreateTunnel) +
2488 p->length * sizeof (struct GNUNET_PeerIdentity);
2490 if (size < size_needed || NULL == buf)
2495 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
2496 msg->header.size = htons (size_needed);
2497 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2498 msg->tid = ntohl (t->id.tid);
2501 if (GNUNET_YES == t->nobuffer)
2502 opt |= MESH_TUNNEL_OPT_NOBUFFER;
2503 msg->opt = htonl (opt);
2504 msg->port = htonl (t->port);
2506 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2507 for (i = 0; i < p->length; i++)
2509 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2513 "CREATE PATH (%u bytes long) sent!\n", size_needed);
2519 * Creates a path ack message in buf and frees all unused resources.
2521 * @param cls closure (MeshTransmissionDescriptor)
2522 * @param size number of bytes available in buf
2523 * @param buf where the callee should write the message
2524 * @return number of bytes written to buf
2527 send_core_path_ack (void *cls, size_t size, void *buf)
2529 struct MeshTunnel *t = cls;
2530 struct GNUNET_MESH_PathACK *msg = buf;
2532 GNUNET_assert (NULL != t);
2533 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2538 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
2539 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2540 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2541 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
2542 msg->tid = htonl (t->id.tid);
2543 msg->peer_id = my_full_id;
2544 msg->ack = htonl (t->prev_fc.last_ack_sent);
2546 /* TODO add signature */
2548 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
2549 return sizeof (struct GNUNET_MESH_PathACK);
2554 * Free a transmission that was already queued with all resources
2555 * associated to the request.
2557 * @param queue Queue handler to cancel.
2558 * @param clear_cls Is it necessary to free associated cls?
2561 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
2563 struct MeshFlowControl *fc;
2565 if (GNUNET_YES == clear_cls)
2567 switch (queue->type)
2569 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2570 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
2571 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
2573 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2574 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2575 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2576 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2577 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2579 " prebuilt message\n");
2580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2582 GNUNET_MESH_DEBUG_M2S (queue->type));
2584 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
2589 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2590 " type %s unknown!\n",
2591 GNUNET_MESH_DEBUG_M2S (queue->type));
2593 GNUNET_free_non_null (queue->cls);
2595 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
2596 queue->peer->queue_tail,
2599 /* Delete from appropiate fc in the tunnel */
2600 if (queue->peer->id == queue->tunnel->next_hop)
2601 fc = &queue->tunnel->next_fc;
2602 else if (queue->peer->id == queue->tunnel->next_hop)
2603 fc = &queue->tunnel->next_fc;
2610 GNUNET_free (queue);
2615 * @brief Get the next transmittable message from the queue.
2617 * This will be the head, except in the case of being a data packet
2618 * not allowed by the destination peer.
2620 * @param peer Destination peer.
2622 * @return The next viable MeshPeerQueue element to send to that peer.
2623 * NULL when there are no transmittable messages.
2625 struct MeshPeerQueue *
2626 queue_get_next (const struct MeshPeerInfo *peer)
2628 struct MeshPeerQueue *q;
2630 struct GNUNET_MESH_Unicast *ucast;
2631 struct GNUNET_MESH_ToOrigin *to_orig;
2632 struct MeshTunnel* t;
2636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
2637 for (q = peer->queue_head; NULL != q; q = q->next)
2640 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2642 GNUNET_MESH_DEBUG_M2S(q->type));
2645 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2646 ucast = (struct GNUNET_MESH_Unicast *) q->cls;
2647 pid = ntohl (ucast->pid);
2648 ack = t->next_fc.last_ack_recv;
2650 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2651 to_orig = (struct GNUNET_MESH_ToOrigin *) q->cls;
2652 pid = ntohl (to_orig->pid);
2653 ack = t->prev_fc.last_ack_recv;
2656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2661 "* ACK: %u, PID: %u\n",
2663 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2676 "* nothing found\n");
2682 queue_send (void *cls, size_t size, void *buf)
2684 struct MeshPeerInfo *peer = cls;
2685 struct GNUNET_MessageHeader *msg;
2686 struct MeshPeerQueue *queue;
2687 struct MeshTunnel *t;
2688 struct GNUNET_PeerIdentity dst_id;
2689 struct MeshFlowControl *fc;
2693 peer->core_transmit = NULL;
2695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
2696 queue = queue_get_next (peer);
2698 /* Queue has no internal mesh traffic nor sendable payload */
2701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
2702 if (NULL == peer->queue_head)
2703 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
2706 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
2708 GNUNET_PEER_resolve (peer->id, &dst_id);
2709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2711 GNUNET_i2s (&dst_id));
2712 /* Check if buffer size is enough for the message */
2713 if (queue->size > size)
2715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2716 "* not enough room, reissue\n");
2717 peer->core_transmit =
2718 GNUNET_CORE_notify_transmit_ready (core_handle,
2721 GNUNET_TIME_UNIT_FOREVER_REL,
2728 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
2731 GNUNET_assert (0 < t->pending_messages);
2732 t->pending_messages--;
2736 switch (queue->type)
2739 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2740 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2741 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
2742 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
2743 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2744 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2747 GNUNET_MESH_DEBUG_M2S (queue->type));
2749 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2750 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2751 data_size = send_core_data_raw (queue->cls, size, buf);
2752 msg = (struct GNUNET_MessageHeader *) buf;
2753 type = ntohs (msg->type);
2755 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
2757 data_size = send_core_path_create (queue->cls, size, buf);
2759 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2760 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
2761 data_size = send_core_path_ack (queue->cls, size, buf);
2765 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2766 "* type unknown: %u\n",
2771 /* Free queue, but cls was freed by send_core_* */
2772 queue_destroy (queue, GNUNET_NO);
2774 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
2777 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2778 t->next_fc.last_pid_sent = ((struct GNUNET_MESH_Unicast *) buf)->pid;
2779 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
2781 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2782 t->prev_fc.last_pid_sent = ((struct GNUNET_MESH_ToOrigin *) buf)->pid;
2783 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
2789 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
2791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
2795 /* If more data in queue, send next */
2796 queue = queue_get_next (peer);
2799 struct GNUNET_PeerIdentity id;
2801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
2802 GNUNET_PEER_resolve (peer->id, &id);
2803 peer->core_transmit =
2804 GNUNET_CORE_notify_transmit_ready(core_handle,
2807 GNUNET_TIME_UNIT_FOREVER_REL,
2813 else if (NULL != peer->queue_head)
2815 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2817 GNUNET_i2s (&my_full_id));
2818 if (peer->id == t->next_hop)
2820 else if (peer->id == t->prev_hop)
2827 if (NULL != fc && GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
2830 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
2840 * @brief Queue and pass message to core when possible.
2842 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
2843 * accounts for it. In case the queue is full, the message is dropped and
2846 * Otherwise, message is treated as internal and allowed to go regardless of
2849 * @param cls Closure (@c type dependant). It will be used by queue_send to
2850 * build the message to be sent if not already prebuilt.
2851 * @param type Type of the message, 0 for a raw message.
2852 * @param size Size of the message.
2853 * @param dst Neighbor to send message to.
2854 * @param t Tunnel this message belongs to.
2857 queue_add (void *cls, uint16_t type, size_t size,
2858 struct MeshPeerInfo *dst, struct MeshTunnel *t)
2860 struct MeshPeerQueue *queue;
2861 struct GNUNET_PeerIdentity id;
2865 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2867 n = &t->next_fc.queue_n;
2869 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
2871 n = &t->prev_fc.queue_n;
2875 if (*n >= t->queue_max)
2878 GNUNET_STATISTICS_update(stats,
2879 "# messages dropped (buffer full)",
2881 return; /* Drop message */
2885 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
2891 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
2892 if (NULL == dst->core_transmit)
2894 GNUNET_PEER_resolve (dst->id, &id);
2895 dst->core_transmit =
2896 GNUNET_CORE_notify_transmit_ready (core_handle,
2899 GNUNET_TIME_UNIT_FOREVER_REL,
2905 t->pending_messages++;
2909 /******************************************************************************/
2910 /******************** MESH NETWORK HANDLERS **************************/
2911 /******************************************************************************/
2915 * Core handler for path creation
2917 * @param cls closure
2918 * @param message message
2919 * @param peer peer identity this notification is about
2921 * @return GNUNET_OK to keep the connection open,
2922 * GNUNET_SYSERR to close it (signal serious error)
2925 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2926 const struct GNUNET_MessageHeader *message)
2928 unsigned int own_pos;
2931 MESH_TunnelNumber tid;
2932 struct GNUNET_MESH_CreateTunnel *msg;
2933 struct GNUNET_PeerIdentity *pi;
2934 struct MeshPeerPath *path;
2935 struct MeshPeerInfo *dest_peer_info;
2936 struct MeshPeerInfo *orig_peer_info;
2937 struct MeshTunnel *t;
2939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2940 "Received a path create msg [%s]\n",
2941 GNUNET_i2s (&my_full_id));
2942 size = ntohs (message->size);
2943 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
2945 GNUNET_break_op (0);
2949 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
2950 if (size % sizeof (struct GNUNET_PeerIdentity))
2952 GNUNET_break_op (0);
2955 size /= sizeof (struct GNUNET_PeerIdentity);
2958 GNUNET_break_op (0);
2961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
2962 msg = (struct GNUNET_MESH_CreateTunnel *) message;
2964 tid = ntohl (msg->tid);
2965 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2967 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
2968 t = tunnel_get (pi, tid);
2969 if (NULL == t) /* might be a local tunnel */
2973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
2974 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
2980 t->port = ntohl (msg->port);
2981 opt = ntohl (msg->opt);
2982 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
2984 t->nobuffer = GNUNET_YES;
2985 t->prev_fc.last_ack_sent = t->prev_fc.last_pid_recv + 1;
2986 t->next_fc.last_ack_sent = t->next_fc.last_pid_recv + 1;
2989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
2991 tunnel_reset_timeout (t);
2993 t->state = MESH_TUNNEL_WAITING;
2995 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
2996 if (NULL == dest_peer_info)
2998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2999 " Creating PeerInfo for destination.\n");
3000 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3001 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3002 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3004 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3006 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3007 if (NULL == orig_peer_info)
3009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3010 " Creating PeerInfo for origin.\n");
3011 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3012 orig_peer_info->id = GNUNET_PEER_intern (pi);
3013 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3014 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3016 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3017 path = path_new (size);
3019 for (i = 0; i < size; i++)
3021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3022 GNUNET_i2s (&pi[i]));
3023 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3024 if (path->peers[i] == myid)
3027 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3028 if (own_pos == 0 && path->peers[own_pos] != myid)
3030 /* create path: self not found in path through self */
3031 GNUNET_break_op (0);
3032 path_destroy (path);
3036 path_add_to_peers (path, GNUNET_NO);
3037 tunnel_use_path (t, path);
3039 if (own_pos == size - 1)
3041 struct MeshClient *c;
3042 struct GNUNET_HashCode hc;
3044 /* Find target client */
3045 GMC_hash32 (t->port, &hc);
3046 c = GNUNET_CONTAINER_multihashmap_get (ports, &hc);
3049 /* TODO send reject */
3053 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3054 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3057 /* Assign local tid */
3058 while (NULL != tunnel_get_incoming (next_local_tid))
3059 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3060 t->local_tid_dest = next_local_tid++;
3061 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3063 tunnel_add_client (t, c);
3064 send_client_tunnel_create (t);
3069 struct MeshPeerPath *path2;
3071 t->next_hop = path->peers[own_pos + 1];
3072 GNUNET_PEER_change_rc(t->next_hop, 1);
3074 /* It's for somebody else! Retransmit. */
3075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3076 path2 = path_duplicate (path);
3077 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3078 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3079 send_create_path (t);
3087 * Core handler for path ACKs
3089 * @param cls closure
3090 * @param message message
3091 * @param peer peer identity this notification is about
3093 * @return GNUNET_OK to keep the connection open,
3094 * GNUNET_SYSERR to close it (signal serious error)
3097 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3098 const struct GNUNET_MessageHeader *message)
3100 struct GNUNET_MESH_PathACK *msg;
3101 struct MeshPeerInfo *peer_info;
3102 struct MeshPeerPath *p;
3103 struct MeshTunnel *t;
3105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3106 GNUNET_i2s (&my_full_id));
3107 msg = (struct GNUNET_MESH_PathACK *) message;
3108 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3111 /* TODO notify that we don't know the tunnel */
3112 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3114 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3118 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3120 peer_info = peer_get (&msg->peer_id);
3121 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3122 GNUNET_i2s (&msg->peer_id));
3123 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3126 /* Add path to peers? */
3130 path_add_to_peers (p, GNUNET_YES);
3136 t->state = MESH_TUNNEL_READY;
3137 t->next_fc.last_ack_recv = ntohl (msg->ack);
3138 t->prev_fc.last_ack_sent = ntohl (msg->ack);
3140 /* Message for us? */
3141 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3144 if (NULL == t->owner)
3146 GNUNET_break_op (0);
3149 if (NULL != peer_info->dhtget)
3151 GNUNET_DHT_get_stop (peer_info->dhtget);
3152 peer_info->dhtget = NULL;
3154 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3158 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3159 " not for us, retransmitting...\n");
3160 peer_info = peer_get (&msg->oid);
3161 send_prebuilt_message (message, t->prev_hop, t);
3167 * Core handler for notifications of broken paths
3169 * @param cls closure
3170 * @param message message
3171 * @param peer peer identity this notification is about
3173 * @return GNUNET_OK to keep the connection open,
3174 * GNUNET_SYSERR to close it (signal serious error)
3177 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3178 const struct GNUNET_MessageHeader *message)
3180 struct GNUNET_MESH_PathBroken *msg;
3181 struct MeshTunnel *t;
3183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3184 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3185 msg = (struct GNUNET_MESH_PathBroken *) message;
3186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3187 GNUNET_i2s (&msg->peer1));
3188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3189 GNUNET_i2s (&msg->peer2));
3190 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3193 GNUNET_break_op (0);
3196 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3197 GNUNET_PEER_search (&msg->peer2));
3204 * Core handler for tunnel destruction
3206 * @param cls closure
3207 * @param message message
3208 * @param peer peer identity this notification is about
3210 * @return GNUNET_OK to keep the connection open,
3211 * GNUNET_SYSERR to close it (signal serious error)
3214 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3215 const struct GNUNET_MessageHeader *message)
3217 struct GNUNET_MESH_TunnelDestroy *msg;
3218 struct MeshTunnel *t;
3220 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3222 "Got a TUNNEL DESTROY packet from %s\n",
3224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3225 " for tunnel %s [%u]\n",
3226 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3227 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3230 /* Probably already got the message from another path,
3231 * destroyed the tunnel and retransmitted to children.
3234 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3238 // TODO check owner's signature
3239 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3241 /* Tunnel was incoming, notify clients */
3242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3243 t->local_tid, t->local_tid_dest);
3244 send_client_tunnel_destroy (t);
3246 tunnel_send_destroy (t);
3247 t->destroy = GNUNET_YES;
3248 // TODO: add timeout to destroy the tunnel anyway
3254 * Core handler for mesh network traffic going from the origin to a peer
3256 * @param cls closure
3257 * @param peer peer identity this notification is about
3258 * @param message message
3259 * @return GNUNET_OK to keep the connection open,
3260 * GNUNET_SYSERR to close it (signal serious error)
3263 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3264 const struct GNUNET_MessageHeader *message)
3266 struct GNUNET_MESH_Unicast *msg;
3267 struct MeshTunnel *t;
3272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3275 size = ntohs (message->size);
3277 sizeof (struct GNUNET_MESH_Unicast) +
3278 sizeof (struct GNUNET_MessageHeader))
3283 msg = (struct GNUNET_MESH_Unicast *) message;
3284 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3285 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3287 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3290 /* TODO notify back: we don't know this tunnel */
3291 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3292 GNUNET_break_op (0);
3295 pid = ntohl (msg->pid);
3296 if (t->prev_fc.last_pid_recv == pid)
3298 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
3299 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3300 " Already seen pid %u, DROPPING!\n", pid);
3305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3306 " pid %u not seen yet, forwarding\n", pid);
3309 if (GMC_is_pid_bigger (pid, t->prev_fc.last_ack_sent))
3311 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3312 GNUNET_break_op (0);
3313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3314 "Received PID %u, ACK %u\n",
3315 pid, t->prev_fc.last_ack_sent);
3316 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3319 t->prev_fc.last_pid_recv = pid;
3321 tunnel_reset_timeout (t);
3322 if (t->dest == myid)
3324 if (NULL == t->client)
3329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3330 " it's for us! sending to clients...\n");
3331 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
3332 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
3333 message, GNUNET_NO);
3334 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3337 if (0 == t->next_hop)
3342 ttl = ntohl (msg->ttl);
3343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
3346 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
3347 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
3348 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3352 " not for us, retransmitting...\n");
3354 send_prebuilt_message (message, t->next_hop, t);
3355 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
3361 * Core handler for mesh network traffic toward the owner of a tunnel
3363 * @param cls closure
3364 * @param message message
3365 * @param peer peer identity this notification is about
3367 * @return GNUNET_OK to keep the connection open,
3368 * GNUNET_SYSERR to close it (signal serious error)
3371 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3372 const struct GNUNET_MessageHeader *message)
3374 struct GNUNET_MESH_ToOrigin *msg;
3375 struct MeshTunnel *t;
3379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
3381 size = ntohs (message->size);
3382 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3383 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3385 GNUNET_break_op (0);
3388 msg = (struct GNUNET_MESH_ToOrigin *) message;
3389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3390 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3391 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3392 pid = ntohl (msg->pid);
3396 /* TODO notify that we dont know this tunnel (whom)? */
3397 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3399 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
3400 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3404 if (t->next_fc.last_pid_recv == pid)
3406 /* already seen this packet, drop */
3407 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
3408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3409 " Already seen pid %u, DROPPING!\n", pid);
3410 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3414 if (GMC_is_pid_bigger (pid, t->next_fc.last_ack_sent))
3416 GNUNET_STATISTICS_update (stats, "# unsolicited to_orig", 1, GNUNET_NO);
3417 GNUNET_break_op (0);
3418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3419 "Received PID %u, ACK %u\n",
3420 pid, t->next_fc.last_ack_sent);
3421 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3424 t->next_fc.last_pid_recv = pid;
3425 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3426 " pid %u not seen yet, forwarding\n", pid);
3428 if (NULL != t->owner)
3431 struct GNUNET_MESH_ToOrigin *copy;
3433 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3434 " it's for us! sending to clients...\n");
3435 /* TODO signature verification */
3436 memcpy (cbuf, message, size);
3437 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3438 copy->tid = htonl (t->local_tid);
3439 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
3440 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3441 ©->header, GNUNET_NO);
3442 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
3445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3446 " not for us, retransmitting...\n");
3448 if (0 == t->prev_hop) /* No owner AND no prev hop */
3450 if (GNUNET_YES == t->destroy)
3452 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3453 "to orig received on a dying tunnel %s [%X]\n",
3454 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3457 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3458 "unknown to origin at %s\n",
3459 GNUNET_i2s (&my_full_id));
3460 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3463 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3464 "on tunnel %s [%X]\n",
3465 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3468 send_prebuilt_message (message, t->prev_hop, t);
3469 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
3476 * Core handler for mesh network traffic point-to-point acks.
3478 * @param cls closure
3479 * @param message message
3480 * @param peer peer identity this notification is about
3482 * @return GNUNET_OK to keep the connection open,
3483 * GNUNET_SYSERR to close it (signal serious error)
3486 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3487 const struct GNUNET_MessageHeader *message)
3489 struct GNUNET_MESH_ACK *msg;
3490 struct MeshTunnel *t;
3494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
3496 msg = (struct GNUNET_MESH_ACK *) message;
3498 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3502 /* TODO notify that we dont know this tunnel (whom)? */
3503 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
3506 ack = ntohl (msg->pid);
3507 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
3509 /* Is this a forward or backward ACK? */
3510 id = GNUNET_PEER_search (peer);
3511 if (t->next_hop == id)
3514 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
3515 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task &&
3516 GMC_is_pid_bigger (ack, t->next_fc.last_ack_recv))
3518 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3519 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3520 t->next_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3522 t->next_fc.last_ack_recv = ack;
3523 peer_unlock_queue (t->next_hop);
3524 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3526 else if (t->prev_hop == id)
3529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
3530 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task &&
3531 GMC_is_pid_bigger (ack, t->prev_fc.last_ack_recv))
3533 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3534 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3535 t->prev_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3537 t->prev_fc.last_ack_recv = ack;
3538 peer_unlock_queue (t->prev_hop);
3539 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3542 GNUNET_break_op (0);
3548 * Core handler for mesh network traffic point-to-point ack polls.
3550 * @param cls closure
3551 * @param message message
3552 * @param peer peer identity this notification is about
3554 * @return GNUNET_OK to keep the connection open,
3555 * GNUNET_SYSERR to close it (signal serious error)
3558 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
3559 const struct GNUNET_MessageHeader *message)
3561 struct GNUNET_MESH_Poll *msg;
3562 struct MeshTunnel *t;
3565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
3568 msg = (struct GNUNET_MESH_Poll *) message;
3570 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3574 /* TODO notify that we dont know this tunnel (whom)? */
3575 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
3576 GNUNET_break_op (0);
3580 /* Is this a forward or backward ACK? */
3581 id = GNUNET_PEER_search(peer);
3582 if (t->next_hop == id)
3584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
3585 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3587 else if (t->prev_hop == id)
3589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
3590 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3600 * Core handler for mesh keepalives.
3602 * @param cls closure
3603 * @param message message
3604 * @param peer peer identity this notification is about
3605 * @return GNUNET_OK to keep the connection open,
3606 * GNUNET_SYSERR to close it (signal serious error)
3608 * TODO: Check who we got this from, to validate route.
3611 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
3612 const struct GNUNET_MessageHeader *message)
3614 struct GNUNET_MESH_TunnelKeepAlive *msg;
3615 struct MeshTunnel *t;
3617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
3620 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
3621 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3625 /* TODO notify that we dont know that tunnel */
3626 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
3631 tunnel_reset_timeout (t);
3633 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
3634 send_prebuilt_message (message, t->next_hop, t);
3641 * Functions to handle messages from core
3643 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3644 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3645 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3646 sizeof (struct GNUNET_MESH_PathBroken)},
3647 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
3648 sizeof (struct GNUNET_MESH_TunnelDestroy)},
3649 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3650 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
3651 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
3652 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3653 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
3654 sizeof (struct GNUNET_MESH_ACK)},
3655 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
3656 sizeof (struct GNUNET_MESH_Poll)},
3657 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3658 sizeof (struct GNUNET_MESH_PathACK)},
3664 /******************************************************************************/
3665 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3666 /******************************************************************************/
3671 * notify_client_connection_failure: notify a client that the connection to the
3672 * requested remote peer is not possible (for instance, no route found)
3673 * Function called when the socket is ready to queue more data. "buf" will be
3674 * NULL and "size" zero if the socket was closed for writing in the meantime.
3676 * @param cls closure
3677 * @param size number of bytes available in buf
3678 * @param buf where the callee should write the message
3679 * @return number of bytes written to buf
3682 notify_client_connection_failure (void *cls, size_t size, void *buf)
3685 struct MeshPeerInfo *peer_info;
3686 struct GNUNET_MESH_PeerControl *msg;
3687 struct GNUNET_PeerIdentity id;
3689 if (0 == size && NULL == buf)
3691 // TODO retry? cancel?
3695 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3696 peer_info = (struct MeshPeerInfo *) cls;
3697 msg = (struct GNUNET_MESH_PeerControl *) buf;
3698 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3699 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3700 // msg->tunnel_id = htonl(peer_info->t->tid);
3701 GNUNET_PEER_resolve (peer_info->id, &id);
3702 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3710 * Send keepalive packets for a tunnel.
3712 * @param cls Closure (tunnel for which to send the keepalive).
3713 * @param tc Notification context.
3716 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3718 struct MeshTunnel *t = cls;
3719 struct GNUNET_MESH_TunnelKeepAlive *msg;
3720 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
3723 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3724 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3725 NULL == t->owner || 0 == t->local_tid || 0 != t->prev_hop)
3730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3731 "sending keepalive for tunnel %d\n", t->id.tid);
3733 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
3734 msg->header.size = htons (size);
3735 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3736 msg->oid = my_full_id;
3737 msg->tid = htonl (t->id.tid);
3738 send_prebuilt_message (&msg->header, t->next_hop, t);
3740 t->maintenance_task =
3741 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3746 * Function to process paths received for a new peer addition. The recorded
3747 * paths form the initial tunnel, which can be optimized later.
3748 * Called on each result obtained for the DHT search.
3750 * @param cls closure
3751 * @param exp when will this value expire
3752 * @param key key of the result
3753 * @param get_path path of the get request
3754 * @param get_path_length lenght of get_path
3755 * @param put_path path of the put request
3756 * @param put_path_length length of the put_path
3757 * @param type type of the result
3758 * @param size number of bytes in data
3759 * @param data pointer to the result data
3762 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3763 const struct GNUNET_HashCode * key,
3764 const struct GNUNET_PeerIdentity *get_path,
3765 unsigned int get_path_length,
3766 const struct GNUNET_PeerIdentity *put_path,
3767 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3768 size_t size, const void *data)
3770 struct MeshPeerInfo *peer = cls;
3771 struct MeshPeerPath *p;
3772 struct GNUNET_PeerIdentity pi;
3775 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
3776 GNUNET_PEER_resolve (peer->id, &pi);
3777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
3779 p = path_build_from_dht (get_path, get_path_length,
3780 put_path, put_path_length);
3781 path_add_to_peers (p, GNUNET_NO);
3783 for (i = 0; i < peer->ntunnels; i++)
3785 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
3786 peer_connect (peer, peer->tunnels[i]);
3793 /******************************************************************************/
3794 /********************* MESH LOCAL HANDLES **************************/
3795 /******************************************************************************/
3799 * Handler for client disconnection
3801 * @param cls closure
3802 * @param client identification of the client; NULL
3803 * for the last call when the server is destroyed
3806 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3808 struct MeshClient *c;
3809 struct MeshClient *next;
3811 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
3814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
3821 if (c->handle != client)
3823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
3827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
3829 GNUNET_SERVER_client_drop (c->handle);
3830 c->shutting_down = GNUNET_YES;
3831 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3832 &tunnel_destroy_iterator, c);
3833 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3834 &tunnel_destroy_iterator, c);
3835 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3836 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3838 if (NULL != c->ports)
3839 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
3841 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
3842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
3844 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
3847 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
3853 * Handler for new clients
3855 * @param cls closure
3856 * @param client identification of the client
3857 * @param message the actual message, which includes messages the client wants
3860 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3861 const struct GNUNET_MessageHeader *message)
3863 struct GNUNET_MESH_ClientConnect *cc_msg;
3864 struct MeshClient *c;
3869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
3871 /* Check data sanity */
3872 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3873 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3874 if (0 != (size % sizeof (uint32_t)))
3877 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3880 size /= sizeof (uint32_t);
3882 /* Create new client structure */
3883 c = GNUNET_malloc (sizeof (struct MeshClient));
3884 c->id = next_client_id++; /* overflow not important: just for debug */
3885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
3886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
3888 GNUNET_SERVER_client_keep (client);
3892 struct GNUNET_HashCode hc;
3894 p = (uint32_t *) &cc_msg[1];
3895 c->ports = GNUNET_CONTAINER_multihashmap_create (size, GNUNET_NO);
3896 for (i = 0; i < size; i++)
3899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
3900 GMC_hash32 (u32, &hc);
3902 /* store in client's hashmap */
3903 GNUNET_CONTAINER_multihashmap_put (c->ports, &hc, c,
3904 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
3905 /* store in global hashmap */
3906 /* FIXME only allow one client to have the port open,
3907 * have a backup hashmap with waiting clients */
3908 GNUNET_CONTAINER_multihashmap_put (ports, &hc, c,
3909 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3913 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
3914 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3915 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3916 GNUNET_SERVER_notification_context_add (nc, client);
3917 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
3919 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
3925 * Handler for requests of new tunnels
3927 * @param cls Closure.
3928 * @param client Identification of the client.
3929 * @param message The actual message.
3932 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3933 const struct GNUNET_MessageHeader *message)
3935 struct GNUNET_MESH_TunnelMessage *t_msg;
3936 struct MeshPeerInfo *peer_info;
3937 struct MeshTunnel *t;
3938 struct MeshClient *c;
3939 MESH_TunnelNumber tid;
3941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
3943 /* Sanity check for client registration */
3944 if (NULL == (c = client_get (client)))
3947 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3952 /* Message sanity check */
3953 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3956 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3960 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
3962 GNUNET_i2s (&t_msg->peer));
3963 /* Sanity check for tunnel numbering */
3964 tid = ntohl (t_msg->tunnel_id);
3965 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3968 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3971 /* Sanity check for duplicate tunnel IDs */
3972 if (NULL != tunnel_get_by_local_id (c, tid))
3975 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3979 while (NULL != tunnel_get_by_pi (myid, next_tid))
3980 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3981 t = tunnel_new (myid, next_tid, c, tid);
3982 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
3986 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3989 t->port = ntohl (t_msg->port);
3990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
3991 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
3993 peer_info = peer_get (&t_msg->peer);
3994 GNUNET_array_append (peer_info->tunnels, peer_info->ntunnels, t);
3995 peer_connect (peer_info, t);
3996 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4002 * Handler for requests of deleting tunnels
4004 * @param cls closure
4005 * @param client identification of the client
4006 * @param message the actual message
4009 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4010 const struct GNUNET_MessageHeader *message)
4012 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4013 struct MeshClient *c;
4014 struct MeshTunnel *t;
4015 MESH_TunnelNumber tid;
4017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4018 "Got a DESTROY TUNNEL from client!\n");
4020 /* Sanity check for client registration */
4021 if (NULL == (c = client_get (client)))
4024 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4027 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4029 /* Message sanity check */
4030 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4033 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4037 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4039 /* Retrieve tunnel */
4040 tid = ntohl (tunnel_msg->tunnel_id);
4041 t = tunnel_get_by_local_id(c, tid);
4044 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4046 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4051 tunnel_destroy_empty (t);
4052 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4055 send_client_tunnel_destroy (t);
4056 client_delete_tunnel (c, t);
4058 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4060 tunnel_send_destroy (t);
4061 peer_remove_tunnel (peer_get_short(t->dest), t);
4062 t->destroy = GNUNET_YES;
4063 /* The tunnel will be destroyed when the last message is transmitted. */
4064 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4070 * Handler for requests of seeting tunnel's buffering policy.
4072 * @param cls Closure (unused).
4073 * @param client Identification of the client.
4074 * @param message The actual message.
4077 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
4078 const struct GNUNET_MessageHeader *message)
4080 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4081 struct MeshClient *c;
4082 struct MeshTunnel *t;
4083 MESH_TunnelNumber tid;
4085 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4086 "Got a BUFFER request from client!\n");
4088 /* Sanity check for client registration */
4089 if (NULL == (c = client_get (client)))
4092 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4095 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4097 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4099 /* Retrieve tunnel */
4100 tid = ntohl (tunnel_msg->tunnel_id);
4101 t = tunnel_get_by_local_id(c, tid);
4104 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4106 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4110 switch (ntohs(message->type))
4112 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
4113 t->nobuffer = GNUNET_NO;
4115 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
4116 t->nobuffer = GNUNET_YES;
4122 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4127 * Handler for client traffic directed to one peer
4129 * @param cls closure
4130 * @param client identification of the client
4131 * @param message the actual message
4134 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4135 const struct GNUNET_MessageHeader *message)
4137 struct MeshClient *c;
4138 struct MeshTunnel *t;
4139 struct GNUNET_MESH_Unicast *data_msg;
4140 MESH_TunnelNumber tid;
4143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4144 "Got a unicast request from a client!\n");
4146 /* Sanity check for client registration */
4147 if (NULL == (c = client_get (client)))
4150 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4153 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4155 data_msg = (struct GNUNET_MESH_Unicast *) message;
4157 /* Sanity check for message size */
4158 size = ntohs (message->size);
4159 if (sizeof (struct GNUNET_MESH_Unicast) +
4160 sizeof (struct GNUNET_MessageHeader) > size)
4163 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4167 /* Tunnel exists? */
4168 tid = ntohl (data_msg->tid);
4169 t = tunnel_get_by_local_id (c, tid);
4173 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4177 /* Is it a local tunnel? Then, does client own the tunnel? */
4178 if (t->owner->handle != client)
4181 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4185 /* PID should be as expected: client<->service communication */
4186 if (ntohl (data_msg->pid) != t->prev_fc.last_pid_recv + 1)
4189 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4190 "Unicast PID, expected %u, got %u\n",
4191 t->prev_fc.last_pid_recv + 1, ntohl (data_msg->pid));
4192 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4196 /* Ok, everything is correct, send the message
4197 * (pretend we got it from a mesh peer)
4200 /* Work around const limitation */
4201 char buf[ntohs (message->size)] GNUNET_ALIGN;
4202 struct GNUNET_MESH_Unicast *copy;
4204 copy = (struct GNUNET_MESH_Unicast *) buf;
4205 memcpy (buf, data_msg, size);
4206 copy->oid = my_full_id;
4207 copy->tid = htonl (t->id.tid);
4208 copy->ttl = htonl (default_ttl);
4209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4210 " calling generic handler...\n");
4211 handle_mesh_unicast (NULL, &my_full_id, ©->header);
4213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4214 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4221 * Handler for client traffic directed to the origin
4223 * @param cls closure
4224 * @param client identification of the client
4225 * @param message the actual message
4228 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4229 const struct GNUNET_MessageHeader *message)
4231 struct GNUNET_MESH_ToOrigin *data_msg;
4232 struct MeshFlowControl *fc;
4233 struct MeshClient *c;
4234 struct MeshTunnel *t;
4235 MESH_TunnelNumber tid;
4238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4239 "Got a ToOrigin request from a client!\n");
4240 /* Sanity check for client registration */
4241 if (NULL == (c = client_get (client)))
4244 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4249 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4251 /* Sanity check for message size */
4252 size = ntohs (message->size);
4253 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4254 sizeof (struct GNUNET_MessageHeader) > size)
4257 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4261 /* Tunnel exists? */
4262 tid = ntohl (data_msg->tid);
4263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4264 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4267 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4270 t = tunnel_get_by_local_id (c, tid);
4273 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4274 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4276 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4280 /* It should be sent by someone who has this as incoming tunnel. */
4284 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4288 /* PID should be as expected */
4290 if (ntohl (data_msg->pid) != fc->last_pid_recv + 1)
4293 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4294 "To Origin PID, expected %u, got %u\n",
4295 fc->last_pid_recv + 1,
4296 ntohl (data_msg->pid));
4297 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4301 /* Ok, everything is correct, send the message
4302 * (pretend we got it from a mesh peer)
4305 char buf[ntohs (message->size)] GNUNET_ALIGN;
4306 struct GNUNET_MESH_ToOrigin *copy;
4308 /* Work around 'const' limitation */
4309 memcpy (buf, data_msg, size);
4310 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4311 GNUNET_PEER_resolve (t->id.oid, ©->oid);
4312 copy->tid = htonl (t->id.tid);
4313 copy->ttl = htonl (default_ttl);
4315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4316 " calling generic handler...\n");
4317 handle_mesh_to_orig (NULL, &my_full_id, ©->header);
4319 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4326 * Handler for client's ACKs for payload traffic.
4328 * @param cls Closure (unused).
4329 * @param client Identification of the client.
4330 * @param message The actual message.
4333 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
4334 const struct GNUNET_MessageHeader *message)
4336 struct GNUNET_MESH_LocalAck *msg;
4337 struct MeshTunnel *t;
4338 struct MeshClient *c;
4339 MESH_TunnelNumber tid;
4342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
4343 /* Sanity check for client registration */
4344 if (NULL == (c = client_get (client)))
4347 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4352 msg = (struct GNUNET_MESH_LocalAck *) message;
4354 /* Tunnel exists? */
4355 tid = ntohl (msg->tunnel_id);
4356 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4357 t = tunnel_get_by_local_id (c, tid);
4361 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4362 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4363 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4367 ack = ntohl (msg->max_pid);
4368 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
4370 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
4373 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
4374 t->prev_fc.last_ack_recv = ack;
4375 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4379 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
4380 t->next_fc.last_ack_recv = ack;
4381 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4384 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4392 * Iterator over all tunnels to send a monitoring client info about each tunnel.
4394 * @param cls Closure (client handle).
4395 * @param key Key (hashed tunnel ID, unused).
4396 * @param value Tunnel info.
4398 * @return GNUNET_YES, to keep iterating.
4401 monitor_all_tunnels_iterator (void *cls,
4402 const struct GNUNET_HashCode * key,
4405 struct GNUNET_SERVER_Client *client = cls;
4406 struct MeshTunnel *t = value;
4407 struct GNUNET_MESH_LocalMonitor *msg;
4409 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
4410 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
4411 msg->tunnel_id = htonl (t->id.tid);
4412 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4413 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
4414 GNUNET_PEER_resolve (t->dest, &msg->destination);
4416 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4417 "* sending info about tunnel %s [%u]\n",
4418 GNUNET_i2s (&msg->owner), t->id.tid);
4420 GNUNET_SERVER_notification_context_unicast (nc, client,
4421 &msg->header, GNUNET_NO);
4427 * Handler for client's MONITOR request.
4429 * @param cls Closure (unused).
4430 * @param client Identification of the client.
4431 * @param message The actual message.
4434 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
4435 const struct GNUNET_MessageHeader *message)
4437 struct MeshClient *c;
4439 /* Sanity check for client registration */
4440 if (NULL == (c = client_get (client)))
4443 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4447 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4448 "Received get tunnels request from client %u\n",
4450 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
4451 monitor_all_tunnels_iterator,
4453 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4454 "Get tunnels request from client %u completed\n",
4456 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4461 * Handler for client's MONITOR_TUNNEL request.
4463 * @param cls Closure (unused).
4464 * @param client Identification of the client.
4465 * @param message The actual message.
4468 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
4469 const struct GNUNET_MessageHeader *message)
4471 const struct GNUNET_MESH_LocalMonitor *msg;
4472 struct GNUNET_MESH_LocalMonitor *resp;
4473 struct MeshClient *c;
4474 struct MeshTunnel *t;
4476 /* Sanity check for client registration */
4477 if (NULL == (c = client_get (client)))
4480 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4484 msg = (struct GNUNET_MESH_LocalMonitor *) message;
4485 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4486 "Received tunnel info request from client %u for tunnel %s[%X]\n",
4489 ntohl (msg->tunnel_id));
4490 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
4493 /* We don't know the tunnel FIXME */
4494 struct GNUNET_MESH_LocalMonitor warn;
4497 GNUNET_SERVER_notification_context_unicast (nc, client,
4500 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4504 /* Initialize context */
4505 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
4507 GNUNET_PEER_resolve (t->dest, &resp->destination);
4508 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4509 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
4510 &resp->header, GNUNET_NO);
4513 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4514 "Monitor tunnel request from client %u completed\n",
4516 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4521 * Functions to handle messages from clients
4523 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4524 {&handle_local_new_client, NULL,
4525 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4526 {&handle_local_tunnel_create, NULL,
4527 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4528 sizeof (struct GNUNET_MESH_TunnelMessage)},
4529 {&handle_local_tunnel_destroy, NULL,
4530 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4531 sizeof (struct GNUNET_MESH_TunnelMessage)},
4532 {&handle_local_tunnel_buffer, NULL,
4533 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
4534 sizeof (struct GNUNET_MESH_TunnelMessage)},
4535 {&handle_local_tunnel_buffer, NULL,
4536 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
4537 sizeof (struct GNUNET_MESH_TunnelMessage)},
4538 {&handle_local_unicast, NULL,
4539 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4540 {&handle_local_to_origin, NULL,
4541 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4542 {&handle_local_ack, NULL,
4543 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
4544 sizeof (struct GNUNET_MESH_LocalAck)},
4545 {&handle_local_get_tunnels, NULL,
4546 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
4547 sizeof (struct GNUNET_MessageHeader)},
4548 {&handle_local_show_tunnel, NULL,
4549 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
4550 sizeof (struct GNUNET_MESH_LocalMonitor)},
4556 * Method called whenever a given peer connects.
4558 * @param cls closure
4559 * @param peer peer identity this notification is about
4562 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
4564 struct MeshPeerInfo *peer_info;
4565 struct MeshPeerPath *path;
4567 DEBUG_CONN ("Peer connected\n");
4568 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
4569 peer_info = peer_get (peer);
4570 if (myid == peer_info->id)
4572 DEBUG_CONN (" (self)\n");
4577 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
4579 path = path_new (2);
4580 path->peers[0] = myid;
4581 path->peers[1] = peer_info->id;
4582 GNUNET_PEER_change_rc (myid, 1);
4583 GNUNET_PEER_change_rc (peer_info->id, 1);
4584 peer_info_add_path (peer_info, path, GNUNET_YES);
4585 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
4591 * Method called whenever a peer disconnects.
4593 * @param cls closure
4594 * @param peer peer identity this notification is about
4597 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4599 struct MeshPeerInfo *pi;
4600 struct MeshPeerQueue *q;
4601 struct MeshPeerQueue *n;
4603 DEBUG_CONN ("Peer disconnected\n");
4604 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4614 /* TODO try to reroute this traffic instead */
4615 queue_destroy(q, GNUNET_YES);
4618 if (NULL != pi->core_transmit)
4620 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
4621 pi->core_transmit = NULL;
4623 peer_remove_path (pi, pi->id, myid);
4626 DEBUG_CONN (" (self)\n");
4628 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
4634 * Install server (service) handlers and start listening to clients.
4639 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4640 GNUNET_SERVER_disconnect_notify (server_handle,
4641 &handle_local_client_disconnect, NULL);
4642 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
4644 clients_head = NULL;
4645 clients_tail = NULL;
4647 GNUNET_SERVER_resume (server_handle);
4652 * To be called on core init/fail.
4654 * @param cls Closure (config)
4655 * @param server handle to the server for this service
4656 * @param identity the public identity of this peer
4659 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4660 const struct GNUNET_PeerIdentity *identity)
4662 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
4666 GNUNET_break (core_handle == server);
4667 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4670 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
4671 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4673 GNUNET_i2s (identity));
4674 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4676 GNUNET_i2s (&my_full_id));
4677 GNUNET_CORE_disconnect (core_handle);
4678 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4679 NULL, /* Closure passed to MESH functions */
4680 &core_init, /* Call core_init once connected */
4681 &core_connect, /* Handle connects */
4682 &core_disconnect, /* remove peers on disconnects */
4683 NULL, /* Don't notify about all incoming messages */
4684 GNUNET_NO, /* For header only in notification */
4685 NULL, /* Don't notify about all outbound messages */
4686 GNUNET_NO, /* For header-only out notification */
4687 core_handlers); /* Register these handlers */
4696 /******************************************************************************/
4697 /************************ MAIN FUNCTIONS ****************************/
4698 /******************************************************************************/
4701 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4703 * @param cls closure
4704 * @param key current key code
4705 * @param value value in the hash map
4706 * @return GNUNET_YES if we should continue to iterate,
4710 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
4712 struct MeshTunnel *t = value;
4719 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4721 * @param cls closure
4722 * @param key current key code
4723 * @param value value in the hash map
4724 * @return GNUNET_YES if we should continue to iterate,
4728 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
4730 struct MeshPeerInfo *p = value;
4731 struct MeshPeerQueue *q;
4732 struct MeshPeerQueue *n;
4740 queue_destroy(q, GNUNET_YES);
4744 peer_info_destroy (p);
4750 * Task run during shutdown.
4756 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
4760 if (core_handle != NULL)
4762 GNUNET_CORE_disconnect (core_handle);
4767 GNUNET_CRYPTO_ecc_key_create_stop (keygen);
4770 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4771 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4772 if (dht_handle != NULL)
4774 GNUNET_DHT_disconnect (dht_handle);
4779 GNUNET_SERVER_notification_context_destroy (nc);
4782 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4784 GNUNET_SCHEDULER_cancel (announce_id_task);
4785 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4787 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
4792 * Callback for hostkey read/generation.
4794 * @param cls Closure (Configuration handle).
4795 * @param pk The ECC private key.
4796 * @param emsg Error message, if any.
4799 key_generation_cb (void *cls,
4800 struct GNUNET_CRYPTO_EccPrivateKey *pk,
4803 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4804 struct MeshPeerInfo *peer;
4805 struct MeshPeerPath *p;
4810 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4811 _("Could not access hostkey: %s. Exiting.\n"),
4813 GNUNET_SCHEDULER_shutdown ();
4816 my_private_key = pk;
4817 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
4818 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4819 &my_full_id.hashPubKey);
4820 myid = GNUNET_PEER_intern (&my_full_id);
4821 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4822 "Mesh for peer [%s] starting\n",
4823 GNUNET_i2s(&my_full_id));
4825 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4826 NULL, /* Closure passed to MESH functions */
4827 &core_init, /* Call core_init once connected */
4828 &core_connect, /* Handle connects */
4829 &core_disconnect, /* remove peers on disconnects */
4830 NULL, /* Don't notify about all incoming messages */
4831 GNUNET_NO, /* For header only in notification */
4832 NULL, /* Don't notify about all outbound messages */
4833 GNUNET_NO, /* For header-only out notification */
4834 core_handlers); /* Register these handlers */
4835 if (core_handle == NULL)
4838 GNUNET_SCHEDULER_shutdown ();
4843 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4845 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4847 /* Create a peer_info for the local peer */
4848 peer = peer_get (&my_full_id);
4851 GNUNET_PEER_change_rc (myid, 1);
4852 peer_info_add_path (peer, p, GNUNET_YES);
4854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
4859 * Process mesh requests.
4861 * @param cls closure
4862 * @param server the initialized server
4863 * @param c configuration to use
4866 run (void *cls, struct GNUNET_SERVER_Handle *server,
4867 const struct GNUNET_CONFIGURATION_Handle *c)
4871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
4872 server_handle = server;
4873 GNUNET_SERVER_suspend (server_handle);
4876 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
4879 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4881 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4882 "mesh", "peer/privatekey");
4883 GNUNET_SCHEDULER_shutdown ();
4888 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
4889 &refresh_path_time))
4891 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4893 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4894 "mesh", "refresh path time");
4895 GNUNET_SCHEDULER_shutdown ();
4900 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
4903 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4905 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4906 "mesh", "id announce time");
4907 GNUNET_SCHEDULER_shutdown ();
4912 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
4915 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4917 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4918 "mesh", "connect timeout");
4919 GNUNET_SCHEDULER_shutdown ();
4924 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
4927 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4929 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4930 "mesh", "max msgs queue");
4931 GNUNET_SCHEDULER_shutdown ();
4936 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
4939 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4941 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4942 "mesh", "max tunnels");
4943 GNUNET_SCHEDULER_shutdown ();
4948 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
4951 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4953 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4954 "mesh", "default ttl", 64);
4959 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
4962 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4963 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4964 "mesh", "max peers", 1000);
4969 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
4970 &dht_replication_level))
4972 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4974 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4975 "mesh", "dht replication level", 3);
4976 dht_replication_level = 3;
4979 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4980 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4981 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4982 ports = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
4984 dht_handle = GNUNET_DHT_connect (c, 64);
4985 if (NULL == dht_handle)
4989 stats = GNUNET_STATISTICS_create ("mesh", c);
4991 /* Scheduled the task to clean up when shutdown is called */
4992 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
4994 keygen = GNUNET_CRYPTO_ecc_key_create_start (keyfile,
4997 GNUNET_free (keyfile);
5002 * The main function for the mesh service.
5004 * @param argc number of arguments from the command line
5005 * @param argv command line arguments
5006 * @return 0 ok, 1 on error
5009 main (int argc, char *const *argv)
5014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5015 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5017 ret = (GNUNET_OK == r) ? 0 : 1;
5018 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
5022 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5023 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
5024 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);