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.
10 GNUnet is distributed in the hope that it will be useful, but
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_PEER_resolve (t->id.oid, &msg.peer);
941 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
942 &msg.header, GNUNET_NO);
947 * Notify dest client that the incoming tunnel is no longer valid.
949 * @param t Tunnel that was destroyed.
952 send_client_tunnel_destroy (struct MeshTunnel *t)
954 struct GNUNET_MESH_TunnelMessage msg;
956 if (NULL == t->client)
958 msg.header.size = htons (sizeof (msg));
959 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
960 msg.tunnel_id = htonl (t->local_tid_dest);
961 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
962 &msg.header, GNUNET_NO);
967 * Iterator over all the peers to remove the oldest not-used entry.
969 * @param cls Closure (unsued).
970 * @param key ID of the peer.
971 * @param value Peer_Info of the peer.
976 peer_info_timeout (void *cls,
977 const struct GNUNET_HashCode *key,
984 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
985 * and insert it in the appropiate structures if the peer is not known yet.
987 * @param peer Full identity of the peer.
989 * @return Existing or newly created peer info.
991 static struct MeshPeerInfo *
992 peer_get (const struct GNUNET_PeerIdentity *peer)
994 struct MeshPeerInfo *peer_info;
996 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
997 if (NULL == peer_info)
1000 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1001 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1003 GNUNET_CONTAINER_multihashmap_iterate (peers,
1007 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1008 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1009 peer_info->id = GNUNET_PEER_intern (peer);
1011 peer_info->last_contact = GNUNET_TIME_absolute_get();
1018 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1019 * and insert it in the appropiate structures if the peer is not known yet.
1021 * @param peer Short identity of the peer.
1023 * @return Existing or newly created peer info.
1025 static struct MeshPeerInfo *
1026 peer_get_short (const GNUNET_PEER_Id peer)
1028 struct GNUNET_PeerIdentity id;
1030 GNUNET_PEER_resolve (peer, &id);
1031 return peer_get (&id);
1036 * Choose the best path towards a peer considering the tunnel properties.
1038 * @param peer The destination peer.
1039 * @param t The tunnel the path is for.
1041 * @return Best current known path towards the peer, if any.
1043 static struct MeshPeerPath *
1044 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1046 struct MeshPeerPath *best_p;
1047 struct MeshPeerPath *p;
1048 unsigned int best_cost;
1051 best_p = p = peer->path_head;
1052 best_cost = cost = p->length;
1055 if ((cost = p->length) < best_cost)
1067 * Remove the tunnel from the list of tunnels to which a peer is target.
1069 * @param peer PeerInfo of the peer.
1070 * @param t Tunnel to remove.
1073 peer_remove_tunnel (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1077 for (i = 0; i < peer->ntunnels; i++)
1080 memcmp (&peer->tunnels[i]->id, &t->id, sizeof (struct MESH_TunnelID)))
1083 peer->tunnels[i] = peer->tunnels[peer->ntunnels];
1085 GNUNET_realloc (peer->tunnels,
1086 peer->ntunnels * sizeof(struct MeshTunnel *));
1094 * Core callback to write a pre-constructed data packet to core buffer
1096 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1097 * @param size Number of bytes available in buf.
1098 * @param buf Where the to write the message.
1100 * @return number of bytes written to buf
1103 send_core_data_raw (void *cls, size_t size, void *buf)
1105 struct GNUNET_MessageHeader *msg = cls;
1108 GNUNET_assert (NULL != msg);
1109 total_size = ntohs (msg->size);
1111 if (total_size > size)
1116 memcpy (buf, msg, total_size);
1123 * Sends an already built message to a peer, properly registrating
1124 * all used resources.
1126 * @param message Message to send. Function makes a copy of it.
1127 * @param peer Short ID of the neighbor whom to send the message.
1128 * @param t Tunnel on which this message is transmitted.
1131 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1132 GNUNET_PEER_Id peer,
1133 struct MeshTunnel *t)
1135 struct GNUNET_PeerIdentity id;
1136 struct MeshPeerInfo *neighbor;
1137 struct MeshPeerPath *p;
1142 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1147 size = ntohs (message->size);
1148 data = GNUNET_malloc (size);
1149 memcpy (data, message, size);
1150 type = ntohs(message->type);
1153 struct GNUNET_MESH_Unicast *u;
1155 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1156 u = (struct GNUNET_MESH_Unicast *) data;
1157 u->ttl = htonl (ntohl (u->ttl) - 1);
1160 GNUNET_PEER_resolve (peer, &id);
1161 neighbor = peer_get (&id);
1162 for (p = neighbor->path_head; NULL != p; p = p->next)
1172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1173 " %s IS NOT DIRECTLY CONNECTED\n",
1175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1178 for (p = neighbor->path_head; NULL != p; p = p->next)
1180 struct GNUNET_PeerIdentity debug_id;
1183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1184 " path with %u hops through:\n",
1186 for (i = 0; i < p->length; i++)
1188 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1189 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1191 i, GNUNET_i2s(&debug_id));
1195 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
1196 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1197 " no direct connection to %s\n",
1202 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1213 * Sends a CREATE PATH message for a path to a peer, properly registrating
1214 * all used resources.
1216 * @param t Tunnel for which the path is created.
1219 send_create_path (struct MeshTunnel *t)
1221 struct MeshPeerInfo *neighbor;
1223 neighbor = peer_get_short (t->next_hop);
1225 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1226 sizeof (struct GNUNET_MESH_CreateTunnel) +
1227 (t->path->length * sizeof (struct GNUNET_PeerIdentity)),
1230 t->state = MESH_TUNNEL_WAITING;
1235 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1237 * @param t Tunnel which to confirm.
1240 send_path_ack (struct MeshTunnel *t)
1242 struct MeshPeerInfo *peer;
1244 peer = peer_get_short (t->prev_hop);
1247 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1248 sizeof (struct GNUNET_MESH_PathACK),
1255 * Try to establish a new connection to this peer in the given tunnel.
1256 * If the peer doesn't have any path to it yet, try to get one.
1257 * If the peer already has some path, send a CREATE PATH towards it.
1259 * @param peer PeerInfo of the peer.
1260 * @param t Tunnel for which to create the path, if possible.
1263 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1265 struct MeshPeerPath *p;
1267 if (NULL != peer->path_head)
1269 p = peer_get_best_path (peer, t);
1270 tunnel_use_path (t, p);
1271 send_create_path (t);
1273 else if (NULL == peer->dhtget)
1275 struct GNUNET_PeerIdentity id;
1277 GNUNET_PEER_resolve (peer->id, &id);
1278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1279 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1280 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1281 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1282 &id.hashPubKey, /* key to search */
1283 dht_replication_level, /* replication level */
1284 GNUNET_DHT_RO_RECORD_ROUTE |
1285 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1287 0, /* xquery bits */
1288 &dht_get_id_handler, peer);
1289 t->state = MESH_TUNNEL_SEARCHING;
1291 /* Otherwise, there is no path but the DHT get is already started. */
1296 * Destroy the peer_info and free any allocated resources linked to it
1298 * @param pi The peer_info to destroy.
1300 * @return GNUNET_OK on success
1303 peer_info_destroy (struct MeshPeerInfo *pi)
1305 struct GNUNET_PeerIdentity id;
1306 struct MeshPeerPath *p;
1307 struct MeshPeerPath *nextp;
1309 GNUNET_PEER_resolve (pi->id, &id);
1310 GNUNET_PEER_change_rc (pi->id, -1);
1313 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1316 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1317 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1319 if (NULL != pi->dhtget)
1321 GNUNET_DHT_get_stop (pi->dhtget);
1327 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1337 * Remove all paths that rely on a direct connection between p1 and p2
1338 * from the peer itself and notify all tunnels about it.
1340 * @param peer PeerInfo of affected peer.
1341 * @param p1 GNUNET_PEER_Id of one peer.
1342 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1345 * TODO: optimize (see below)
1348 peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1351 struct MeshPeerPath *p;
1352 struct MeshPeerPath *next;
1353 struct MeshPeerInfo *peer_d;
1355 unsigned int destroyed;
1358 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1360 for (p = peer->path_head; NULL != p; p = next)
1363 for (i = 0; i < (p->length - 1); i++)
1365 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1366 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1368 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1378 for (i = 0; i < peer->ntunnels; i++)
1380 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1384 peer_d = peer_get_short (d);
1385 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1386 tunnel_use_path (peer->tunnels[i], next);
1387 peer_connect (peer_d, peer->tunnels[i]);
1389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1394 * Add the path to the peer and update the path used to reach it in case this
1397 * @param peer_info Destination peer to add the path to.
1398 * @param path New path to add. Last peer must be the peer in arg 1.
1399 * Path will be either used of freed if already known.
1400 * @param trusted Do we trust that this path is real?
1403 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1406 struct MeshPeerPath *aux;
1410 if ((NULL == peer_info) || (NULL == path))
1413 path_destroy (path);
1416 if (path->peers[path->length - 1] != peer_info->id)
1419 path_destroy (path);
1422 if (path->length <= 2 && GNUNET_NO == trusted)
1424 /* Only allow CORE to tell us about direct paths */
1425 path_destroy (path);
1428 for (l = 1; l < path->length; l++)
1430 if (path->peers[l] == myid)
1432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1433 for (l2 = 0; l2 < path->length - l; l2++)
1435 path->peers[l2] = path->peers[l + l2];
1440 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1445 struct GNUNET_PeerIdentity id;
1447 GNUNET_PEER_resolve (peer_info->id, &id);
1448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1449 path->length, GNUNET_i2s (&id));
1452 l = path_get_length (path);
1459 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1460 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1462 l2 = path_get_length (aux);
1465 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1466 peer_info->path_tail, aux, path);
1471 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1473 path_destroy (path);
1478 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1485 * Add the path to the origin peer and update the path used to reach it in case
1486 * this is the shortest.
1487 * The path is given in peer_info -> destination, therefore we turn the path
1488 * upside down first.
1490 * @param peer_info Peer to add the path to, being the origin of the path.
1491 * @param path New path to add after being inversed.
1492 * Path will be either used or freed.
1493 * @param trusted Do we trust that this path is real?
1496 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1497 struct MeshPeerPath *path, int trusted)
1500 peer_info_add_path (peer_info, path, trusted);
1506 * Remove a tunnel from the list of tunnels a peer participates in.
1508 * @param p Peer to clean.
1509 * @param t Tunnel to remove.
1512 peer_info_remove_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1516 for (i = 0; i < p->ntunnels; i++)
1518 if (p->tunnels[i] == t)
1520 p->tunnels[i] = p->tunnels[p->ntunnels - 1];
1521 GNUNET_array_grow (p->tunnels, p->ntunnels, p->ntunnels - 1);
1529 * Function called if the connection to the peer has been stalled for a while,
1530 * possibly due to a missed ACK. Poll the peer about its ACK status.
1532 * @param cls Closure (poll ctx).
1533 * @param tc TaskContext.
1536 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1538 struct MeshFlowControl *fc = cls;
1539 struct GNUNET_MESH_Poll msg;
1540 struct MeshTunnel *t = fc->t;
1541 GNUNET_PEER_Id peer;
1543 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1544 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1549 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
1550 msg.header.size = htons (sizeof (msg));
1551 msg.tid = htonl (t->id.tid);
1552 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1554 if (fc == &t->prev_fc)
1558 else if (fc == &t->next_fc)
1567 send_prebuilt_message (&msg.header, peer, t);
1568 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
1569 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
1575 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1576 * to obtain a local peer -> destination path and interning the peer ids.
1578 * @return Newly allocated and created path
1580 static struct MeshPeerPath *
1581 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1582 unsigned int get_path_length,
1583 const struct GNUNET_PeerIdentity *put_path,
1584 unsigned int put_path_length)
1586 struct MeshPeerPath *p;
1592 GNUNET_PEER_change_rc (myid, 1);
1593 i = get_path_length;
1594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1595 for (i--; i >= 0; i--)
1597 id = GNUNET_PEER_intern (&get_path[i]);
1598 if (p->length > 0 && id == p->peers[p->length - 1])
1600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1601 GNUNET_PEER_change_rc (id, -1);
1605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1606 GNUNET_i2s (&get_path[i]));
1608 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1609 p->peers[p->length - 1] = id;
1612 i = put_path_length;
1613 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1614 for (i--; i >= 0; i--)
1616 id = GNUNET_PEER_intern (&put_path[i]);
1619 /* PUT path went through us, so discard the path up until now and start
1620 * from here to get a much shorter (and loop-free) path.
1625 if (p->length > 0 && id == p->peers[p->length - 1])
1627 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1628 GNUNET_PEER_change_rc (id, -1);
1632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1633 GNUNET_i2s (&put_path[i]));
1635 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1636 p->peers[p->length - 1] = id;
1640 if (get_path_length > 0)
1641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1642 GNUNET_i2s (&get_path[0]));
1643 if (put_path_length > 0)
1644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1645 GNUNET_i2s (&put_path[0]));
1646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1648 for (i = 0; i < p->length; i++)
1650 struct GNUNET_PeerIdentity peer_id;
1652 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1654 GNUNET_i2s (&peer_id));
1662 * Adds a path to the peer_infos of all the peers in the path
1664 * @param p Path to process.
1665 * @param confirmed Whether we know if the path works or not.
1668 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1672 /* TODO: invert and add */
1673 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1674 for (i++; i < p->length; i++)
1676 struct MeshPeerInfo *aux;
1677 struct MeshPeerPath *copy;
1679 aux = peer_get_short (p->peers[i]);
1680 copy = path_duplicate (p);
1681 copy->length = i + 1;
1682 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
1688 * Send keepalive packets for a peer
1690 * @param cls Closure (tunnel for which to send the keepalive).
1691 * @param tc Notification context.
1694 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1698 * Search for a tunnel among the incoming tunnels
1700 * @param tid the local id of the tunnel
1702 * @return tunnel handler, NULL if doesn't exist
1704 static struct MeshTunnel *
1705 tunnel_get_incoming (MESH_TunnelNumber tid)
1707 struct GNUNET_HashCode hash;
1709 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1710 GMC_hash32 (tid, &hash);
1711 return GNUNET_CONTAINER_multihashmap_get (incoming_tunnels, &hash);
1716 * Search for a tunnel among the tunnels for a client
1718 * @param c the client whose tunnels to search in
1719 * @param tid the local id of the tunnel
1721 * @return tunnel handler, NULL if doesn't exist
1723 static struct MeshTunnel *
1724 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1726 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1728 return tunnel_get_incoming (tid);
1732 struct GNUNET_HashCode hash;
1734 GMC_hash32 (tid, &hash);
1735 return GNUNET_CONTAINER_multihashmap_get (c->own_tunnels, &hash);
1741 * Search for a tunnel by global ID using PEER_ID
1743 * @param pi owner of the tunnel
1744 * @param tid global tunnel number
1746 * @return tunnel handler, NULL if doesn't exist
1748 static struct MeshTunnel *
1749 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1751 struct MESH_TunnelID id;
1752 struct GNUNET_HashCode hash;
1757 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1758 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1763 * Search for a tunnel by global ID using full PeerIdentities
1765 * @param oid owner of the tunnel
1766 * @param tid global tunnel number
1768 * @return tunnel handler, NULL if doesn't exist
1770 static struct MeshTunnel *
1771 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1773 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1778 * Add a client to a tunnel, initializing all needed data structures.
1780 * @param t Tunnel to which add the client.
1781 * @param c Client which to add to the tunnel.
1784 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
1786 struct GNUNET_HashCode hash;
1788 if (NULL != t->client)
1793 GMC_hash32 (t->local_tid_dest, &hash);
1795 GNUNET_CONTAINER_multihashmap_put (c->incoming_tunnels, &hash, t,
1796 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1802 GNUNET_CONTAINER_multihashmap_put (incoming_tunnels, &hash, t,
1803 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1813 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1815 unsigned int own_pos;
1817 for (own_pos = 0; own_pos < p->length; own_pos++)
1819 if (p->peers[own_pos] == myid)
1822 if (own_pos > p->length - 1)
1828 if (own_pos < p->length - 1)
1829 t->next_hop = p->peers[own_pos + 1];
1831 t->next_hop = p->peers[own_pos];
1832 GNUNET_PEER_change_rc (t->next_hop, 1);
1834 t->prev_hop = p->peers[own_pos - 1];
1836 t->prev_hop = p->peers[0];
1837 GNUNET_PEER_change_rc (t->prev_hop, 1);
1839 if (NULL != t->path)
1840 path_destroy (t->path);
1841 t->path = path_duplicate (p);
1844 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
1845 GNUNET_SCHEDULER_cancel (t->maintenance_task);
1846 t->maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
1853 * Notifies a tunnel that a connection has broken that affects at least
1854 * some of its peers. Sends a notification towards the root of the tree.
1855 * In case the peer is the owner of the tree, notifies the client that owns
1856 * the tunnel and tries to reconnect.
1858 * @param t Tunnel affected.
1859 * @param p1 Peer that got disconnected from p2.
1860 * @param p2 Peer that got disconnected from p1.
1862 * @return Short ID of the peer disconnected (either p1 or p2).
1863 * 0 if the tunnel remained unaffected.
1865 static GNUNET_PEER_Id
1866 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1869 // if (myid != p1 && myid != p2) FIXME
1874 // if (tree_get_predecessor (t->tree) != 0)
1876 // /* We are the peer still connected, notify owner of the disconnection. */
1877 // struct GNUNET_MESH_PathBroken msg;
1878 // struct GNUNET_PeerIdentity neighbor;
1880 // msg.header.size = htons (sizeof (msg));
1881 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
1882 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1883 // msg.tid = htonl (t->id.tid);
1884 // msg.peer1 = my_full_id;
1885 // GNUNET_PEER_resolve (pid, &msg.peer2);
1886 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
1887 // send_prebuilt_message (&msg.header, &neighbor, t);
1894 * Build a local ACK message and send it to a local client.
1896 * @param t Tunnel on which to send the ACK.
1897 * @param c Client to whom send the ACK.
1898 * @param ack Value of the ACK.
1901 send_local_ack (struct MeshTunnel *t, struct MeshClient *c, uint32_t ack)
1903 struct GNUNET_MESH_LocalAck msg;
1905 msg.header.size = htons (sizeof (msg));
1906 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1907 msg.tunnel_id = htonl (t->owner == c ? t->local_tid : t->local_tid_dest);
1908 msg.max_pid = htonl (ack);
1909 GNUNET_SERVER_notification_context_unicast(nc,
1916 * Build an ACK message and queue it to send to the given peer.
1918 * @param t Tunnel on which to send the ACK.
1919 * @param peer Peer to whom send the ACK.
1920 * @param ack Value of the ACK.
1923 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
1925 struct GNUNET_MESH_ACK msg;
1927 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1928 msg.header.size = htons (sizeof (msg));
1929 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
1930 msg.pid = htonl (ack);
1931 msg.tid = htonl (t->id.tid);
1933 send_prebuilt_message (&msg.header, peer, t);
1938 * Send an ACK informing the predecessor about the available buffer space.
1939 * In case there is no predecessor, inform the owning client.
1940 * If buffering is off, send only on behalf of children or self if endpoint.
1941 * If buffering is on, send when sent to children and buffer space is free.
1942 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
1943 * the ACK itself goes "back" (towards root).
1945 * @param t Tunnel on which to send the ACK.
1946 * @param type Type of message that triggered the ACK transmission.
1949 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
1953 /* Is it after unicast retransmission? */
1956 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
1957 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1958 "ACK due to FWD DATA retransmission\n");
1959 if (GNUNET_YES == t->nobuffer)
1961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
1965 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1966 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
1968 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1969 t->force_ack = GNUNET_YES;
1975 /* Check if we need to transmit the ACK */
1976 if (t->queue_max > t->next_fc.queue_n * 4 &&
1977 GMC_is_pid_bigger(t->prev_fc.last_ack_sent, t->prev_fc.last_pid_recv) &&
1978 GNUNET_NO == t->force_ack)
1980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
1981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1982 " t->qmax: %u, t->qn: %u\n",
1983 t->queue_max, t->next_fc.queue_n);
1984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1985 " t->pid: %u, t->ack: %u\n",
1986 t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent);
1990 /* Ok, ACK might be necessary, what PID to ACK? */
1991 ack = t->prev_fc.last_pid_recv + t->queue_max - t->next_fc.queue_n;
1992 if (ack == t->prev_fc.last_ack_sent && GNUNET_NO == t->force_ack)
1994 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
1998 t->prev_fc.last_ack_sent = ack;
1999 if (NULL != t->owner)
2000 send_local_ack (t, t->owner, ack);
2001 else if (0 != t->prev_hop)
2002 send_ack (t, t->prev_hop, ack);
2006 t->force_ack = GNUNET_NO;
2011 * Send an ACK informing the children node/client about the available
2013 * If buffering is off, send only on behalf of root (can be self).
2014 * If buffering is on, send when sent to predecessor and buffer space is free.
2015 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
2016 * the ACK itself goes "forward" (towards children/clients).
2018 * @param t Tunnel on which to send the ACK.
2019 * @param type Type of message that triggered the ACK transmission.
2022 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
2025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2026 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
2027 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
2028 /* Is it after data to_origin retransmission? */
2031 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2032 if (GNUNET_YES == t->nobuffer)
2034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2035 " Not sending ACK, nobuffer + traffic\n");
2039 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2040 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2042 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2043 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2044 t->force_ack = GNUNET_YES;
2050 /* TODO: Check if we need to transmit the ACK (as in fwd) */
2052 ack = t->next_fc.last_pid_recv + t->queue_max - t->prev_fc.queue_n;
2054 if (t->next_fc.last_ack_sent == ack && GNUNET_NO == t->force_ack)
2056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2057 " Not sending ACK, not needed\n");
2060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2061 " Sending BCK ACK %u (last sent: %u)\n",
2062 ack, t->next_fc.last_ack_sent);
2063 t->next_fc.last_ack_sent = ack;
2065 if (NULL != t->client)
2066 send_local_ack (t, t->client, ack);
2067 else if (0 != t->next_hop)
2068 send_ack (t, t->next_hop, ack);
2071 t->force_ack = GNUNET_NO;
2076 * @brief Re-initiate traffic to this peer if necessary.
2078 * Check if there is traffic queued towards this peer
2079 * and the core transmit handle is NULL (traffic was stalled).
2080 * If so, call core tmt rdy.
2082 * @param peer_id Short ID of peer to which initiate traffic.
2085 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2087 struct MeshPeerInfo *peer;
2088 struct GNUNET_PeerIdentity id;
2089 struct MeshPeerQueue *q;
2092 peer = peer_get_short (peer_id);
2093 if (NULL != peer->core_transmit)
2096 q = queue_get_next (peer);
2099 /* Might br multicast traffic already sent to this particular peer but
2100 * not to other children in this tunnel.
2101 * This way t->queue_n would be > 0 but the queue of this particular peer
2107 GNUNET_PEER_resolve (peer->id, &id);
2108 peer->core_transmit =
2109 GNUNET_CORE_notify_transmit_ready(core_handle,
2112 GNUNET_TIME_UNIT_FOREVER_REL,
2122 * Send a message to all peers in this tunnel that the tunnel is no longer
2125 * @param t The tunnel whose peers to notify.
2128 tunnel_send_destroy (struct MeshTunnel *t)
2130 struct GNUNET_MESH_TunnelDestroy msg;
2131 struct GNUNET_PeerIdentity id;
2133 msg.header.size = htons (sizeof (msg));
2134 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2135 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2136 msg.tid = htonl (t->id.tid);
2137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2138 " sending tunnel destroy for tunnel: %s [%X]\n",
2139 GNUNET_i2s (&msg.oid), t->id.tid);
2141 if (NULL == t->client && 0 != t->next_hop)
2143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2144 GNUNET_PEER_resolve (t->next_hop, &id);
2145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2146 " sending forward to %s\n",
2148 send_prebuilt_message (&msg.header, t->next_hop, t);
2150 if (NULL == t->owner && 0 != t->prev_hop)
2152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2153 GNUNET_PEER_resolve (t->prev_hop, &id);
2154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2155 " sending back to %s\n",
2157 send_prebuilt_message (&msg.header, t->prev_hop, t);
2163 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2165 * @param t Tunnel which to cancel.
2166 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2169 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2171 struct MeshPeerInfo *peer_info;
2172 struct MeshPeerQueue *pq;
2173 struct MeshPeerQueue *next;
2175 peer_info = peer_get_short (neighbor);
2176 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2179 if (pq->tunnel == t)
2181 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2182 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2184 /* Should have been removed on destroy children */
2187 queue_destroy (pq, GNUNET_YES);
2190 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2192 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2193 peer_info->core_transmit = NULL;
2199 * Destroy the tunnel and free any allocated resources linked to it.
2201 * @param t the tunnel to destroy
2203 * @return GNUNET_OK on success
2206 tunnel_destroy (struct MeshTunnel *t)
2208 struct MeshClient *c;
2209 struct GNUNET_HashCode hash;
2219 struct GNUNET_PeerIdentity id;
2221 GNUNET_PEER_resolve (t->id.oid, &id);
2222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2223 GNUNET_i2s (&id), t->id.tid);
2225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2229 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2230 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2238 GMC_hash32 (t->local_tid, &hash);
2240 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2247 if (NULL != t->client)
2250 GMC_hash32 (t->local_tid_dest, &hash);
2252 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2258 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2265 peer_cancel_queues (t->next_hop, t);
2266 peer_cancel_queues (t->prev_hop, t);
2267 GNUNET_PEER_change_rc(t->next_hop, -1);
2268 GNUNET_PEER_change_rc(t->prev_hop, -1);
2270 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2271 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2274 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2275 path_destroy (t->path);
2281 * Tunnel is empty: destroy it.
2283 * @param t Tunnel to destroy.
2286 tunnel_destroy_empty (struct MeshTunnel *t)
2290 struct GNUNET_PeerIdentity id;
2292 GNUNET_PEER_resolve (t->id.oid, &id);
2293 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2294 "executing destruction of empty tunnel %s [%X]\n",
2295 GNUNET_i2s (&id), t->id.tid);
2299 if (GNUNET_NO == t->destroy)
2300 tunnel_send_destroy (t);
2301 if (0 == t->pending_messages)
2304 t->destroy = GNUNET_YES;
2308 * Initialize a Flow Control structure to the initial state.
2310 * @param fc Flow Control structure to initialize.
2313 fc_init (struct MeshFlowControl *fc)
2315 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2316 fc->last_pid_recv = (uint32_t) -1;
2317 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
2318 fc->last_ack_recv = (uint32_t) -1;
2319 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2320 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2325 * Create a new tunnel
2327 * @param owner Who is the owner of the tunnel (short ID).
2328 * @param tid Tunnel Number of the tunnel.
2329 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2330 * @param local Tunnel Number for the tunnel, for the client point of view.
2332 * @return A new initialized tunnel. NULL on error.
2334 static struct MeshTunnel *
2335 tunnel_new (GNUNET_PEER_Id owner,
2336 MESH_TunnelNumber tid,
2337 struct MeshClient *client,
2338 MESH_TunnelNumber local)
2340 struct MeshTunnel *t;
2341 struct GNUNET_HashCode hash;
2343 if (n_tunnels >= max_tunnels && NULL == client)
2346 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2349 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2351 fc_init (&t->next_fc);
2352 fc_init (&t->prev_fc);
2353 t->local_tid = local;
2355 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2357 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2359 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2360 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2367 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2374 GMC_hash32 (t->local_tid, &hash);
2376 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
2377 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2381 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2392 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2393 * client when the client disconnects. If the client is not the owner, the
2394 * owner will get notified if no more clients are in the tunnel and the client
2395 * get removed from the tunnel's list.
2397 * @param cls closure (client that is disconnecting)
2398 * @param key the hash of the local tunnel id (used to access the hashmap)
2399 * @param value the value stored at the key (tunnel to destroy)
2401 * @return GNUNET_OK, keep iterating.
2404 tunnel_destroy_iterator (void *cls,
2405 const struct GNUNET_HashCode * key,
2408 struct MeshTunnel *t = value;
2409 struct MeshClient *c = cls;
2411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2412 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
2413 t->local_tid, t->local_tid_dest, c->id);
2414 if (GNUNET_NO == c->shutting_down)
2415 send_client_tunnel_destroy (t);
2416 client_delete_tunnel (c, t);
2419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
2423 else if (c == t->owner)
2425 struct MeshPeerInfo *p;
2426 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
2429 p = peer_get_short(t->dest);
2430 peer_info_remove_tunnel (p, t);
2436 tunnel_destroy_empty (t);
2443 * Timeout function, destroys tunnel if called
2445 * @param cls Closure (tunnel to destroy).
2446 * @param tc TaskContext
2449 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2451 struct MeshTunnel *t = cls;
2452 struct GNUNET_PeerIdentity id;
2454 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2455 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2457 GNUNET_PEER_resolve(t->id.oid, &id);
2458 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2459 "Tunnel %s [%X] timed out. Destroying.\n",
2460 GNUNET_i2s(&id), t->id.tid);
2461 send_client_tunnel_destroy (t);
2467 * Resets the tunnel timeout. Starts it if no timeout was running.
2469 * @param t Tunnel whose timeout to reset.
2471 * TODO use heap to improve efficiency of scheduler.
2474 tunnel_reset_timeout (struct MeshTunnel *t)
2476 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
2478 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2479 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2480 t->maintenance_task =
2481 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2482 (refresh_path_time, 4), &tunnel_timeout, t);
2486 /******************************************************************************/
2487 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2488 /******************************************************************************/
2491 * Function to send a create path packet to a peer.
2493 * @param cls closure
2494 * @param size number of bytes available in buf
2495 * @param buf where the callee should write the message
2496 * @return number of bytes written to buf
2499 send_core_path_create (void *cls, size_t size, void *buf)
2501 struct MeshTunnel *t = cls;
2502 struct GNUNET_MESH_CreateTunnel *msg;
2503 struct GNUNET_PeerIdentity *peer_ptr;
2504 struct MeshPeerPath *p = t->path;
2509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
2511 sizeof (struct GNUNET_MESH_CreateTunnel) +
2512 p->length * sizeof (struct GNUNET_PeerIdentity);
2514 if (size < size_needed || NULL == buf)
2519 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
2520 msg->header.size = htons (size_needed);
2521 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2522 msg->tid = ntohl (t->id.tid);
2525 if (GNUNET_YES == t->nobuffer)
2526 opt |= MESH_TUNNEL_OPT_NOBUFFER;
2527 msg->opt = htonl (opt);
2528 msg->port = htonl (t->port);
2530 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2531 for (i = 0; i < p->length; i++)
2533 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2537 "CREATE PATH (%u bytes long) sent!\n", size_needed);
2543 * Creates a path ack message in buf and frees all unused resources.
2545 * @param cls closure (MeshTransmissionDescriptor)
2546 * @param size number of bytes available in buf
2547 * @param buf where the callee should write the message
2548 * @return number of bytes written to buf
2551 send_core_path_ack (void *cls, size_t size, void *buf)
2553 struct MeshTunnel *t = cls;
2554 struct GNUNET_MESH_PathACK *msg = buf;
2556 GNUNET_assert (NULL != t);
2557 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2562 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
2563 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2564 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2565 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
2566 msg->tid = htonl (t->id.tid);
2567 msg->peer_id = my_full_id;
2568 msg->ack = htonl (t->prev_fc.last_ack_sent);
2570 /* TODO add signature */
2572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
2573 return sizeof (struct GNUNET_MESH_PathACK);
2578 * Free a transmission that was already queued with all resources
2579 * associated to the request.
2581 * @param queue Queue handler to cancel.
2582 * @param clear_cls Is it necessary to free associated cls?
2585 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
2587 struct MeshFlowControl *fc;
2589 if (GNUNET_YES == clear_cls)
2591 switch (queue->type)
2593 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2594 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
2595 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
2597 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2598 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2599 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2600 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2601 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2603 " prebuilt message\n");
2604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2606 GNUNET_MESH_DEBUG_M2S (queue->type));
2608 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
2613 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2614 " type %s unknown!\n",
2615 GNUNET_MESH_DEBUG_M2S (queue->type));
2617 GNUNET_free_non_null (queue->cls);
2619 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
2620 queue->peer->queue_tail,
2623 /* Delete from appropiate fc in the tunnel */
2624 if (queue->peer->id == queue->tunnel->next_hop)
2625 fc = &queue->tunnel->next_fc;
2626 else if (queue->peer->id == queue->tunnel->next_hop)
2627 fc = &queue->tunnel->next_fc;
2634 GNUNET_free (queue);
2639 * @brief Get the next transmittable message from the queue.
2641 * This will be the head, except in the case of being a data packet
2642 * not allowed by the destination peer.
2644 * @param peer Destination peer.
2646 * @return The next viable MeshPeerQueue element to send to that peer.
2647 * NULL when there are no transmittable messages.
2649 struct MeshPeerQueue *
2650 queue_get_next (const struct MeshPeerInfo *peer)
2652 struct MeshPeerQueue *q;
2654 struct GNUNET_MESH_Unicast *ucast;
2655 struct GNUNET_MESH_ToOrigin *to_orig;
2656 struct MeshTunnel* t;
2660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
2661 for (q = peer->queue_head; NULL != q; q = q->next)
2664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2666 GNUNET_MESH_DEBUG_M2S(q->type));
2669 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2670 ucast = (struct GNUNET_MESH_Unicast *) q->cls;
2671 pid = ntohl (ucast->pid);
2672 ack = t->next_fc.last_ack_recv;
2674 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2675 to_orig = (struct GNUNET_MESH_ToOrigin *) q->cls;
2676 pid = ntohl (to_orig->pid);
2677 ack = t->prev_fc.last_ack_recv;
2680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2685 "* ACK: %u, PID: %u\n",
2687 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
2689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2695 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2699 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2700 "* nothing found\n");
2706 queue_send (void *cls, size_t size, void *buf)
2708 struct MeshPeerInfo *peer = cls;
2709 struct GNUNET_MessageHeader *msg;
2710 struct MeshPeerQueue *queue;
2711 struct MeshTunnel *t;
2712 struct GNUNET_PeerIdentity dst_id;
2713 struct MeshFlowControl *fc;
2717 peer->core_transmit = NULL;
2719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
2720 queue = queue_get_next (peer);
2722 /* Queue has no internal mesh traffic nor sendable payload */
2725 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
2726 if (NULL == peer->queue_head)
2727 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
2730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
2732 GNUNET_PEER_resolve (peer->id, &dst_id);
2733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2735 GNUNET_i2s (&dst_id));
2736 /* Check if buffer size is enough for the message */
2737 if (queue->size > size)
2739 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2740 "* not enough room, reissue\n");
2741 peer->core_transmit =
2742 GNUNET_CORE_notify_transmit_ready (core_handle,
2745 GNUNET_TIME_UNIT_FOREVER_REL,
2752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
2755 GNUNET_assert (0 < t->pending_messages);
2756 t->pending_messages--;
2760 switch (queue->type)
2763 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2764 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2765 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
2766 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
2767 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2768 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2771 GNUNET_MESH_DEBUG_M2S (queue->type));
2773 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2774 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2775 data_size = send_core_data_raw (queue->cls, size, buf);
2776 msg = (struct GNUNET_MessageHeader *) buf;
2777 type = ntohs (msg->type);
2779 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2780 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
2781 data_size = send_core_path_create (queue->cls, size, buf);
2783 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2784 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
2785 data_size = send_core_path_ack (queue->cls, size, buf);
2789 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2790 "* type unknown: %u\n",
2795 /* Free queue, but cls was freed by send_core_* */
2796 queue_destroy (queue, GNUNET_NO);
2798 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
2801 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2802 t->next_fc.last_pid_sent = ((struct GNUNET_MESH_Unicast *) buf)->pid;
2803 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
2805 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2806 t->prev_fc.last_pid_sent = ((struct GNUNET_MESH_ToOrigin *) buf)->pid;
2807 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
2813 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
2815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
2819 /* If more data in queue, send next */
2820 queue = queue_get_next (peer);
2823 struct GNUNET_PeerIdentity id;
2825 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
2826 GNUNET_PEER_resolve (peer->id, &id);
2827 peer->core_transmit =
2828 GNUNET_CORE_notify_transmit_ready(core_handle,
2831 GNUNET_TIME_UNIT_FOREVER_REL,
2837 else if (NULL != peer->queue_head)
2839 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2841 GNUNET_i2s (&my_full_id));
2842 if (peer->id == t->next_hop)
2844 else if (peer->id == t->prev_hop)
2851 if (NULL != fc && GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
2854 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
2864 * @brief Queue and pass message to core when possible.
2866 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
2867 * accounts for it. In case the queue is full, the message is dropped and
2870 * Otherwise, message is treated as internal and allowed to go regardless of
2873 * @param cls Closure (@c type dependant). It will be used by queue_send to
2874 * build the message to be sent if not already prebuilt.
2875 * @param type Type of the message, 0 for a raw message.
2876 * @param size Size of the message.
2877 * @param dst Neighbor to send message to.
2878 * @param t Tunnel this message belongs to.
2881 queue_add (void *cls, uint16_t type, size_t size,
2882 struct MeshPeerInfo *dst, struct MeshTunnel *t)
2884 struct MeshPeerQueue *queue;
2885 struct GNUNET_PeerIdentity id;
2889 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2891 n = &t->next_fc.queue_n;
2893 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
2895 n = &t->prev_fc.queue_n;
2899 if (*n >= t->queue_max)
2902 GNUNET_STATISTICS_update(stats,
2903 "# messages dropped (buffer full)",
2905 return; /* Drop message */
2909 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
2915 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
2916 if (NULL == dst->core_transmit)
2918 GNUNET_PEER_resolve (dst->id, &id);
2919 dst->core_transmit =
2920 GNUNET_CORE_notify_transmit_ready (core_handle,
2923 GNUNET_TIME_UNIT_FOREVER_REL,
2929 t->pending_messages++;
2933 /******************************************************************************/
2934 /******************** MESH NETWORK HANDLERS **************************/
2935 /******************************************************************************/
2939 * Core handler for path creation
2941 * @param cls closure
2942 * @param message message
2943 * @param peer peer identity this notification is about
2945 * @return GNUNET_OK to keep the connection open,
2946 * GNUNET_SYSERR to close it (signal serious error)
2949 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
2950 const struct GNUNET_MessageHeader *message)
2952 unsigned int own_pos;
2955 MESH_TunnelNumber tid;
2956 struct GNUNET_MESH_CreateTunnel *msg;
2957 struct GNUNET_PeerIdentity *pi;
2958 struct MeshPeerPath *path;
2959 struct MeshPeerInfo *dest_peer_info;
2960 struct MeshPeerInfo *orig_peer_info;
2961 struct MeshTunnel *t;
2963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2964 "Received a path create msg [%s]\n",
2965 GNUNET_i2s (&my_full_id));
2966 size = ntohs (message->size);
2967 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
2969 GNUNET_break_op (0);
2973 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
2974 if (size % sizeof (struct GNUNET_PeerIdentity))
2976 GNUNET_break_op (0);
2979 size /= sizeof (struct GNUNET_PeerIdentity);
2982 GNUNET_break_op (0);
2985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
2986 msg = (struct GNUNET_MESH_CreateTunnel *) message;
2988 tid = ntohl (msg->tid);
2989 pi = (struct GNUNET_PeerIdentity *) &msg[1];
2990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2991 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
2992 t = tunnel_get (pi, tid);
2993 if (NULL == t) /* might be a local tunnel */
2997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
2998 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3004 t->port = ntohl (msg->port);
3005 opt = ntohl (msg->opt);
3006 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
3008 t->nobuffer = GNUNET_YES;
3009 t->prev_fc.last_ack_sent = t->prev_fc.last_pid_recv + 1;
3010 t->next_fc.last_ack_sent = t->next_fc.last_pid_recv + 1;
3013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3015 tunnel_reset_timeout (t);
3017 t->state = MESH_TUNNEL_WAITING;
3019 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3020 if (NULL == dest_peer_info)
3022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3023 " Creating PeerInfo for destination.\n");
3024 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3025 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3026 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3028 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3030 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3031 if (NULL == orig_peer_info)
3033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3034 " Creating PeerInfo for origin.\n");
3035 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3036 orig_peer_info->id = GNUNET_PEER_intern (pi);
3037 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3038 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3041 path = path_new (size);
3043 for (i = 0; i < size; i++)
3045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3046 GNUNET_i2s (&pi[i]));
3047 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3048 if (path->peers[i] == myid)
3051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3052 if (own_pos == 0 && path->peers[own_pos] != myid)
3054 /* create path: self not found in path through self */
3055 GNUNET_break_op (0);
3056 path_destroy (path);
3060 path_add_to_peers (path, GNUNET_NO);
3061 tunnel_use_path (t, path);
3063 if (own_pos == size - 1)
3065 struct MeshClient *c;
3066 struct GNUNET_HashCode hc;
3068 /* Find target client */
3069 GMC_hash32 (t->port, &hc);
3070 c = GNUNET_CONTAINER_multihashmap_get (ports, &hc);
3073 /* TODO send reject */
3077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3078 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3081 /* Assign local tid */
3082 while (NULL != tunnel_get_incoming (next_local_tid))
3083 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3084 t->local_tid_dest = next_local_tid++;
3085 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3087 tunnel_add_client (t, c);
3088 send_client_tunnel_create (t);
3093 struct MeshPeerPath *path2;
3095 t->next_hop = path->peers[own_pos + 1];
3096 GNUNET_PEER_change_rc(t->next_hop, 1);
3098 /* It's for somebody else! Retransmit. */
3099 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3100 path2 = path_duplicate (path);
3101 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3102 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3103 send_create_path (t);
3111 * Core handler for path ACKs
3113 * @param cls closure
3114 * @param message message
3115 * @param peer peer identity this notification is about
3117 * @return GNUNET_OK to keep the connection open,
3118 * GNUNET_SYSERR to close it (signal serious error)
3121 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3122 const struct GNUNET_MessageHeader *message)
3124 struct GNUNET_MESH_PathACK *msg;
3125 struct MeshPeerInfo *peer_info;
3126 struct MeshPeerPath *p;
3127 struct MeshTunnel *t;
3129 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3130 GNUNET_i2s (&my_full_id));
3131 msg = (struct GNUNET_MESH_PathACK *) message;
3132 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3135 /* TODO notify that we don't know the tunnel */
3136 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3137 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3138 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3142 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3144 peer_info = peer_get (&msg->peer_id);
3145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3146 GNUNET_i2s (&msg->peer_id));
3147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3150 /* Add path to peers? */
3154 path_add_to_peers (p, GNUNET_YES);
3160 t->state = MESH_TUNNEL_READY;
3161 t->next_fc.last_ack_recv = ntohl (msg->ack);
3162 t->prev_fc.last_ack_sent = ntohl (msg->ack);
3164 /* Message for us? */
3165 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3168 if (NULL == t->owner)
3170 GNUNET_break_op (0);
3173 if (NULL != peer_info->dhtget)
3175 GNUNET_DHT_get_stop (peer_info->dhtget);
3176 peer_info->dhtget = NULL;
3178 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3182 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3183 " not for us, retransmitting...\n");
3184 peer_info = peer_get (&msg->oid);
3185 send_prebuilt_message (message, t->prev_hop, t);
3191 * Core handler for notifications of broken paths
3193 * @param cls closure
3194 * @param message message
3195 * @param peer peer identity this notification is about
3197 * @return GNUNET_OK to keep the connection open,
3198 * GNUNET_SYSERR to close it (signal serious error)
3201 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3202 const struct GNUNET_MessageHeader *message)
3204 struct GNUNET_MESH_PathBroken *msg;
3205 struct MeshTunnel *t;
3207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3208 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3209 msg = (struct GNUNET_MESH_PathBroken *) message;
3210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3211 GNUNET_i2s (&msg->peer1));
3212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3213 GNUNET_i2s (&msg->peer2));
3214 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3217 GNUNET_break_op (0);
3220 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3221 GNUNET_PEER_search (&msg->peer2));
3228 * Core handler for tunnel destruction
3230 * @param cls closure
3231 * @param message message
3232 * @param peer peer identity this notification is about
3234 * @return GNUNET_OK to keep the connection open,
3235 * GNUNET_SYSERR to close it (signal serious error)
3238 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3239 const struct GNUNET_MessageHeader *message)
3241 struct GNUNET_MESH_TunnelDestroy *msg;
3242 struct MeshTunnel *t;
3244 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3246 "Got a TUNNEL DESTROY packet from %s\n",
3248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3249 " for tunnel %s [%u]\n",
3250 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3251 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3254 /* Probably already got the message from another path,
3255 * destroyed the tunnel and retransmitted to children.
3258 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3262 // TODO check owner's signature
3263 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3265 /* Tunnel was incoming, notify clients */
3266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3267 t->local_tid, t->local_tid_dest);
3268 send_client_tunnel_destroy (t);
3270 tunnel_send_destroy (t);
3271 t->destroy = GNUNET_YES;
3272 // TODO: add timeout to destroy the tunnel anyway
3278 * Core handler for mesh network traffic going from the origin to a peer
3280 * @param cls closure
3281 * @param peer peer identity this notification is about
3282 * @param message message
3283 * @return GNUNET_OK to keep the connection open,
3284 * GNUNET_SYSERR to close it (signal serious error)
3287 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3288 const struct GNUNET_MessageHeader *message)
3290 struct GNUNET_MESH_Unicast *msg;
3291 struct MeshTunnel *t;
3296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3299 size = ntohs (message->size);
3301 sizeof (struct GNUNET_MESH_Unicast) +
3302 sizeof (struct GNUNET_MessageHeader))
3307 msg = (struct GNUNET_MESH_Unicast *) message;
3308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3309 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3311 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3314 /* TODO notify back: we don't know this tunnel */
3315 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3316 GNUNET_break_op (0);
3319 pid = ntohl (msg->pid);
3320 if (t->prev_fc.last_pid_recv == pid)
3322 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
3323 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3324 " Already seen pid %u, DROPPING!\n", pid);
3329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3330 " pid %u not seen yet, forwarding\n", pid);
3333 if (GMC_is_pid_bigger (pid, t->prev_fc.last_ack_sent))
3335 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3336 GNUNET_break_op (0);
3337 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3338 "Received PID %u, ACK %u\n",
3339 pid, t->prev_fc.last_ack_sent);
3340 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3343 t->prev_fc.last_pid_recv = pid;
3345 tunnel_reset_timeout (t);
3346 if (t->dest == myid)
3348 if (NULL == t->client)
3353 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3354 " it's for us! sending to clients...\n");
3355 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
3356 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
3357 message, GNUNET_NO);
3358 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3361 if (0 == t->next_hop)
3366 ttl = ntohl (msg->ttl);
3367 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
3370 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
3371 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
3372 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3376 " not for us, retransmitting...\n");
3378 send_prebuilt_message (message, t->next_hop, t);
3379 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
3385 * Core handler for mesh network traffic toward the owner of a tunnel
3387 * @param cls closure
3388 * @param message message
3389 * @param peer peer identity this notification is about
3391 * @return GNUNET_OK to keep the connection open,
3392 * GNUNET_SYSERR to close it (signal serious error)
3395 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3396 const struct GNUNET_MessageHeader *message)
3398 struct GNUNET_MESH_ToOrigin *msg;
3399 struct MeshTunnel *t;
3403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
3405 size = ntohs (message->size);
3406 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3407 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3409 GNUNET_break_op (0);
3412 msg = (struct GNUNET_MESH_ToOrigin *) message;
3413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3414 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3415 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3416 pid = ntohl (msg->pid);
3420 /* TODO notify that we dont know this tunnel (whom)? */
3421 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3422 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3423 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
3424 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3428 if (t->next_fc.last_pid_recv == pid)
3430 /* already seen this packet, drop */
3431 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
3432 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3433 " Already seen pid %u, DROPPING!\n", pid);
3434 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3438 if (GMC_is_pid_bigger (pid, t->next_fc.last_ack_sent))
3440 GNUNET_STATISTICS_update (stats, "# unsolicited to_orig", 1, GNUNET_NO);
3441 GNUNET_break_op (0);
3442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3443 "Received PID %u, ACK %u\n",
3444 pid, t->next_fc.last_ack_sent);
3445 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3448 t->next_fc.last_pid_recv = pid;
3449 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3450 " pid %u not seen yet, forwarding\n", pid);
3452 if (NULL != t->owner)
3455 struct GNUNET_MESH_ToOrigin *copy;
3457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3458 " it's for us! sending to clients...\n");
3459 /* TODO signature verification */
3460 memcpy (cbuf, message, size);
3461 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
3462 copy->tid = htonl (t->local_tid);
3463 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
3464 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
3465 ©->header, GNUNET_NO);
3466 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
3469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3470 " not for us, retransmitting...\n");
3472 if (0 == t->prev_hop) /* No owner AND no prev hop */
3474 if (GNUNET_YES == t->destroy)
3476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3477 "to orig received on a dying tunnel %s [%X]\n",
3478 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3481 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3482 "unknown to origin at %s\n",
3483 GNUNET_i2s (&my_full_id));
3484 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3487 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3488 "on tunnel %s [%X]\n",
3489 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3492 send_prebuilt_message (message, t->prev_hop, t);
3493 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
3500 * Core handler for mesh network traffic point-to-point acks.
3502 * @param cls closure
3503 * @param message message
3504 * @param peer peer identity this notification is about
3506 * @return GNUNET_OK to keep the connection open,
3507 * GNUNET_SYSERR to close it (signal serious error)
3510 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3511 const struct GNUNET_MessageHeader *message)
3513 struct GNUNET_MESH_ACK *msg;
3514 struct MeshTunnel *t;
3518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
3520 msg = (struct GNUNET_MESH_ACK *) message;
3522 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3526 /* TODO notify that we dont know this tunnel (whom)? */
3527 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
3530 ack = ntohl (msg->pid);
3531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
3533 /* Is this a forward or backward ACK? */
3534 id = GNUNET_PEER_search (peer);
3535 if (t->next_hop == id)
3538 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
3539 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task &&
3540 GMC_is_pid_bigger (ack, t->next_fc.last_ack_recv))
3542 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3543 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3544 t->next_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3546 t->next_fc.last_ack_recv = ack;
3547 peer_unlock_queue (t->next_hop);
3548 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3550 else if (t->prev_hop == id)
3553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
3554 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task &&
3555 GMC_is_pid_bigger (ack, t->prev_fc.last_ack_recv))
3557 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3558 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3559 t->prev_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3561 t->prev_fc.last_ack_recv = ack;
3562 peer_unlock_queue (t->prev_hop);
3563 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3566 GNUNET_break_op (0);
3572 * Core handler for mesh network traffic point-to-point ack polls.
3574 * @param cls closure
3575 * @param message message
3576 * @param peer peer identity this notification is about
3578 * @return GNUNET_OK to keep the connection open,
3579 * GNUNET_SYSERR to close it (signal serious error)
3582 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
3583 const struct GNUNET_MessageHeader *message)
3585 struct GNUNET_MESH_Poll *msg;
3586 struct MeshTunnel *t;
3589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
3592 msg = (struct GNUNET_MESH_Poll *) message;
3594 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3598 /* TODO notify that we dont know this tunnel (whom)? */
3599 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
3600 GNUNET_break_op (0);
3604 /* Is this a forward or backward ACK? */
3605 id = GNUNET_PEER_search(peer);
3606 if (t->next_hop == id)
3608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
3609 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3611 else if (t->prev_hop == id)
3613 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
3614 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3624 * Core handler for mesh keepalives.
3626 * @param cls closure
3627 * @param message message
3628 * @param peer peer identity this notification is about
3629 * @return GNUNET_OK to keep the connection open,
3630 * GNUNET_SYSERR to close it (signal serious error)
3632 * TODO: Check who we got this from, to validate route.
3635 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
3636 const struct GNUNET_MessageHeader *message)
3638 struct GNUNET_MESH_TunnelKeepAlive *msg;
3639 struct MeshTunnel *t;
3641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
3644 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
3645 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3649 /* TODO notify that we dont know that tunnel */
3650 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
3655 tunnel_reset_timeout (t);
3657 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
3658 send_prebuilt_message (message, t->next_hop, t);
3665 * Functions to handle messages from core
3667 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3668 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3669 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3670 sizeof (struct GNUNET_MESH_PathBroken)},
3671 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
3672 sizeof (struct GNUNET_MESH_TunnelDestroy)},
3673 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3674 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
3675 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
3676 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3677 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
3678 sizeof (struct GNUNET_MESH_ACK)},
3679 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
3680 sizeof (struct GNUNET_MESH_Poll)},
3681 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3682 sizeof (struct GNUNET_MESH_PathACK)},
3688 /******************************************************************************/
3689 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3690 /******************************************************************************/
3695 * notify_client_connection_failure: notify a client that the connection to the
3696 * requested remote peer is not possible (for instance, no route found)
3697 * Function called when the socket is ready to queue more data. "buf" will be
3698 * NULL and "size" zero if the socket was closed for writing in the meantime.
3700 * @param cls closure
3701 * @param size number of bytes available in buf
3702 * @param buf where the callee should write the message
3703 * @return number of bytes written to buf
3706 notify_client_connection_failure (void *cls, size_t size, void *buf)
3709 struct MeshPeerInfo *peer_info;
3710 struct GNUNET_MESH_PeerControl *msg;
3711 struct GNUNET_PeerIdentity id;
3713 if (0 == size && NULL == buf)
3715 // TODO retry? cancel?
3719 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3720 peer_info = (struct MeshPeerInfo *) cls;
3721 msg = (struct GNUNET_MESH_PeerControl *) buf;
3722 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3723 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3724 // msg->tunnel_id = htonl(peer_info->t->tid);
3725 GNUNET_PEER_resolve (peer_info->id, &id);
3726 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3734 * Send keepalive packets for a tunnel.
3736 * @param cls Closure (tunnel for which to send the keepalive).
3737 * @param tc Notification context.
3740 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3742 struct MeshTunnel *t = cls;
3743 struct GNUNET_MESH_TunnelKeepAlive *msg;
3744 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
3747 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3748 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3749 NULL == t->owner || 0 == t->local_tid || 0 != t->prev_hop)
3754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3755 "sending keepalive for tunnel %d\n", t->id.tid);
3757 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
3758 msg->header.size = htons (size);
3759 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3760 msg->oid = my_full_id;
3761 msg->tid = htonl (t->id.tid);
3762 send_prebuilt_message (&msg->header, t->next_hop, t);
3764 t->maintenance_task =
3765 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3770 * Function to process paths received for a new peer addition. The recorded
3771 * paths form the initial tunnel, which can be optimized later.
3772 * Called on each result obtained for the DHT search.
3774 * @param cls closure
3775 * @param exp when will this value expire
3776 * @param key key of the result
3777 * @param get_path path of the get request
3778 * @param get_path_length lenght of get_path
3779 * @param put_path path of the put request
3780 * @param put_path_length length of the put_path
3781 * @param type type of the result
3782 * @param size number of bytes in data
3783 * @param data pointer to the result data
3786 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3787 const struct GNUNET_HashCode * key,
3788 const struct GNUNET_PeerIdentity *get_path,
3789 unsigned int get_path_length,
3790 const struct GNUNET_PeerIdentity *put_path,
3791 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3792 size_t size, const void *data)
3794 struct MeshPeerInfo *peer = cls;
3795 struct MeshPeerPath *p;
3796 struct GNUNET_PeerIdentity pi;
3799 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
3800 GNUNET_PEER_resolve (peer->id, &pi);
3801 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
3803 p = path_build_from_dht (get_path, get_path_length,
3804 put_path, put_path_length);
3805 path_add_to_peers (p, GNUNET_NO);
3807 for (i = 0; i < peer->ntunnels; i++)
3809 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
3810 peer_connect (peer, peer->tunnels[i]);
3817 /******************************************************************************/
3818 /********************* MESH LOCAL HANDLES **************************/
3819 /******************************************************************************/
3823 * Handler for client disconnection
3825 * @param cls closure
3826 * @param client identification of the client; NULL
3827 * for the last call when the server is destroyed
3830 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3832 struct MeshClient *c;
3833 struct MeshClient *next;
3835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
3838 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
3845 if (c->handle != client)
3847 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
3851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
3853 GNUNET_SERVER_client_drop (c->handle);
3854 c->shutting_down = GNUNET_YES;
3855 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3856 &tunnel_destroy_iterator, c);
3857 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3858 &tunnel_destroy_iterator, c);
3859 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3860 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3862 if (NULL != c->ports)
3863 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
3865 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
3866 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
3868 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
3871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
3877 * Handler for new clients
3879 * @param cls closure
3880 * @param client identification of the client
3881 * @param message the actual message, which includes messages the client wants
3884 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3885 const struct GNUNET_MessageHeader *message)
3887 struct GNUNET_MESH_ClientConnect *cc_msg;
3888 struct MeshClient *c;
3893 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
3895 /* Check data sanity */
3896 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3897 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3898 if (0 != (size % sizeof (uint32_t)))
3901 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3904 size /= sizeof (uint32_t);
3906 /* Create new client structure */
3907 c = GNUNET_malloc (sizeof (struct MeshClient));
3908 c->id = next_client_id++; /* overflow not important: just for debug */
3909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
3910 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
3912 GNUNET_SERVER_client_keep (client);
3916 struct GNUNET_HashCode hc;
3918 p = (uint32_t *) &cc_msg[1];
3919 c->ports = GNUNET_CONTAINER_multihashmap_create (size, GNUNET_NO);
3920 for (i = 0; i < size; i++)
3923 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
3924 GMC_hash32 (u32, &hc);
3926 /* store in client's hashmap */
3927 GNUNET_CONTAINER_multihashmap_put (c->ports, &hc, c,
3928 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
3929 /* store in global hashmap */
3930 /* FIXME only allow one client to have the port open,
3931 * have a backup hashmap with waiting clients */
3932 GNUNET_CONTAINER_multihashmap_put (ports, &hc, c,
3933 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3937 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
3938 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3939 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3940 GNUNET_SERVER_notification_context_add (nc, client);
3941 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
3943 GNUNET_SERVER_receive_done (client, GNUNET_OK);
3944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
3949 * Handler for requests of new tunnels
3951 * @param cls Closure.
3952 * @param client Identification of the client.
3953 * @param message The actual message.
3956 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
3957 const struct GNUNET_MessageHeader *message)
3959 struct GNUNET_MESH_TunnelMessage *t_msg;
3960 struct MeshPeerInfo *peer_info;
3961 struct MeshTunnel *t;
3962 struct MeshClient *c;
3963 MESH_TunnelNumber tid;
3965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
3967 /* Sanity check for client registration */
3968 if (NULL == (c = client_get (client)))
3971 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3976 /* Message sanity check */
3977 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
3980 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3984 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
3985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
3986 GNUNET_i2s (&t_msg->peer));
3987 /* Sanity check for tunnel numbering */
3988 tid = ntohl (t_msg->tunnel_id);
3989 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
3992 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3995 /* Sanity check for duplicate tunnel IDs */
3996 if (NULL != tunnel_get_by_local_id (c, tid))
3999 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4003 while (NULL != tunnel_get_by_pi (myid, next_tid))
4004 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4005 t = tunnel_new (myid, next_tid, c, tid);
4006 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4010 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4013 t->port = ntohl (t_msg->port);
4014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
4015 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
4017 peer_info = peer_get (&t_msg->peer);
4018 GNUNET_array_append (peer_info->tunnels, peer_info->ntunnels, t);
4019 peer_connect (peer_info, t);
4020 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4026 * Handler for requests of deleting tunnels
4028 * @param cls closure
4029 * @param client identification of the client
4030 * @param message the actual message
4033 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4034 const struct GNUNET_MessageHeader *message)
4036 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4037 struct MeshClient *c;
4038 struct MeshTunnel *t;
4039 MESH_TunnelNumber tid;
4041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4042 "Got a DESTROY TUNNEL from client!\n");
4044 /* Sanity check for client registration */
4045 if (NULL == (c = client_get (client)))
4048 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4053 /* Message sanity check */
4054 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4057 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4061 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4063 /* Retrieve tunnel */
4064 tid = ntohl (tunnel_msg->tunnel_id);
4065 t = tunnel_get_by_local_id(c, tid);
4068 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4070 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4075 tunnel_destroy_empty (t);
4076 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4079 send_client_tunnel_destroy (t);
4080 client_delete_tunnel (c, t);
4082 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4084 tunnel_send_destroy (t);
4085 peer_remove_tunnel (peer_get_short(t->dest), t);
4086 t->destroy = GNUNET_YES;
4087 /* The tunnel will be destroyed when the last message is transmitted. */
4088 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4094 * Handler for requests of seeting tunnel's buffering policy.
4096 * @param cls Closure (unused).
4097 * @param client Identification of the client.
4098 * @param message The actual message.
4101 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
4102 const struct GNUNET_MessageHeader *message)
4104 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4105 struct MeshClient *c;
4106 struct MeshTunnel *t;
4107 MESH_TunnelNumber tid;
4109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4110 "Got a BUFFER request from client!\n");
4112 /* Sanity check for client registration */
4113 if (NULL == (c = client_get (client)))
4116 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4121 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4123 /* Retrieve tunnel */
4124 tid = ntohl (tunnel_msg->tunnel_id);
4125 t = tunnel_get_by_local_id(c, tid);
4128 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4130 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4134 switch (ntohs(message->type))
4136 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
4137 t->nobuffer = GNUNET_NO;
4139 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
4140 t->nobuffer = GNUNET_YES;
4146 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4151 * Handler for client traffic directed to one peer
4153 * @param cls closure
4154 * @param client identification of the client
4155 * @param message the actual message
4158 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4159 const struct GNUNET_MessageHeader *message)
4161 struct MeshClient *c;
4162 struct MeshTunnel *t;
4163 struct GNUNET_MESH_Unicast *data_msg;
4164 MESH_TunnelNumber tid;
4167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4168 "Got a unicast request from a client!\n");
4170 /* Sanity check for client registration */
4171 if (NULL == (c = client_get (client)))
4174 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4177 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4179 data_msg = (struct GNUNET_MESH_Unicast *) message;
4181 /* Sanity check for message size */
4182 size = ntohs (message->size);
4183 if (sizeof (struct GNUNET_MESH_Unicast) +
4184 sizeof (struct GNUNET_MessageHeader) > size)
4187 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4191 /* Tunnel exists? */
4192 tid = ntohl (data_msg->tid);
4193 t = tunnel_get_by_local_id (c, tid);
4197 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4201 /* Is it a local tunnel? Then, does client own the tunnel? */
4202 if (t->owner->handle != client)
4205 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4209 /* PID should be as expected: client<->service communication */
4210 if (ntohl (data_msg->pid) != t->prev_fc.last_pid_recv + 1)
4213 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4214 "Unicast PID, expected %u, got %u\n",
4215 t->prev_fc.last_pid_recv + 1, ntohl (data_msg->pid));
4216 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4220 /* Ok, everything is correct, send the message
4221 * (pretend we got it from a mesh peer)
4224 /* Work around const limitation */
4225 char buf[ntohs (message->size)] GNUNET_ALIGN;
4226 struct GNUNET_MESH_Unicast *copy;
4228 copy = (struct GNUNET_MESH_Unicast *) buf;
4229 memcpy (buf, data_msg, size);
4230 copy->oid = my_full_id;
4231 copy->tid = htonl (t->id.tid);
4232 copy->ttl = htonl (default_ttl);
4233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4234 " calling generic handler...\n");
4235 handle_mesh_unicast (NULL, &my_full_id, ©->header);
4237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4238 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4245 * Handler for client traffic directed to the origin
4247 * @param cls closure
4248 * @param client identification of the client
4249 * @param message the actual message
4252 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4253 const struct GNUNET_MessageHeader *message)
4255 struct GNUNET_MESH_ToOrigin *data_msg;
4256 struct MeshFlowControl *fc;
4257 struct MeshClient *c;
4258 struct MeshTunnel *t;
4259 MESH_TunnelNumber tid;
4262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4263 "Got a ToOrigin request from a client!\n");
4264 /* Sanity check for client registration */
4265 if (NULL == (c = client_get (client)))
4268 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4271 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4273 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4275 /* Sanity check for message size */
4276 size = ntohs (message->size);
4277 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4278 sizeof (struct GNUNET_MessageHeader) > size)
4281 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4285 /* Tunnel exists? */
4286 tid = ntohl (data_msg->tid);
4287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4288 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4291 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4294 t = tunnel_get_by_local_id (c, tid);
4297 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4298 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4300 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4304 /* It should be sent by someone who has this as incoming tunnel. */
4308 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4312 /* PID should be as expected */
4314 if (ntohl (data_msg->pid) != fc->last_pid_recv + 1)
4317 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4318 "To Origin PID, expected %u, got %u\n",
4319 fc->last_pid_recv + 1,
4320 ntohl (data_msg->pid));
4321 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4325 /* Ok, everything is correct, send the message
4326 * (pretend we got it from a mesh peer)
4329 char buf[ntohs (message->size)] GNUNET_ALIGN;
4330 struct GNUNET_MESH_ToOrigin *copy;
4332 /* Work around 'const' limitation */
4333 memcpy (buf, data_msg, size);
4334 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4335 GNUNET_PEER_resolve (t->id.oid, ©->oid);
4336 copy->tid = htonl (t->id.tid);
4337 copy->ttl = htonl (default_ttl);
4339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4340 " calling generic handler...\n");
4341 handle_mesh_to_orig (NULL, &my_full_id, ©->header);
4343 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4350 * Handler for client's ACKs for payload traffic.
4352 * @param cls Closure (unused).
4353 * @param client Identification of the client.
4354 * @param message The actual message.
4357 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
4358 const struct GNUNET_MessageHeader *message)
4360 struct GNUNET_MESH_LocalAck *msg;
4361 struct MeshTunnel *t;
4362 struct MeshClient *c;
4363 MESH_TunnelNumber tid;
4366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
4367 /* Sanity check for client registration */
4368 if (NULL == (c = client_get (client)))
4371 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4374 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4376 msg = (struct GNUNET_MESH_LocalAck *) message;
4378 /* Tunnel exists? */
4379 tid = ntohl (msg->tunnel_id);
4380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4381 t = tunnel_get_by_local_id (c, tid);
4385 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4386 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4387 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4391 ack = ntohl (msg->max_pid);
4392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
4394 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
4397 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
4398 t->prev_fc.last_ack_recv = ack;
4399 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4403 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
4404 t->next_fc.last_ack_recv = ack;
4405 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4408 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4416 * Iterator over all tunnels to send a monitoring client info about each tunnel.
4418 * @param cls Closure (client handle).
4419 * @param key Key (hashed tunnel ID, unused).
4420 * @param value Tunnel info.
4422 * @return GNUNET_YES, to keep iterating.
4425 monitor_all_tunnels_iterator (void *cls,
4426 const struct GNUNET_HashCode * key,
4429 struct GNUNET_SERVER_Client *client = cls;
4430 struct MeshTunnel *t = value;
4431 struct GNUNET_MESH_LocalMonitor *msg;
4433 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
4434 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
4435 msg->tunnel_id = htonl (t->id.tid);
4436 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4437 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
4438 GNUNET_PEER_resolve (t->dest, &msg->destination);
4440 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4441 "* sending info about tunnel %s [%u]\n",
4442 GNUNET_i2s (&msg->owner), t->id.tid);
4444 GNUNET_SERVER_notification_context_unicast (nc, client,
4445 &msg->header, GNUNET_NO);
4451 * Handler for client's MONITOR request.
4453 * @param cls Closure (unused).
4454 * @param client Identification of the client.
4455 * @param message The actual message.
4458 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
4459 const struct GNUNET_MessageHeader *message)
4461 struct MeshClient *c;
4463 /* Sanity check for client registration */
4464 if (NULL == (c = client_get (client)))
4467 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4471 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4472 "Received get tunnels request from client %u\n",
4474 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
4475 monitor_all_tunnels_iterator,
4477 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4478 "Get tunnels request from client %u completed\n",
4480 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4485 * Handler for client's MONITOR_TUNNEL request.
4487 * @param cls Closure (unused).
4488 * @param client Identification of the client.
4489 * @param message The actual message.
4492 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
4493 const struct GNUNET_MessageHeader *message)
4495 const struct GNUNET_MESH_LocalMonitor *msg;
4496 struct GNUNET_MESH_LocalMonitor *resp;
4497 struct MeshClient *c;
4498 struct MeshTunnel *t;
4500 /* Sanity check for client registration */
4501 if (NULL == (c = client_get (client)))
4504 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4508 msg = (struct GNUNET_MESH_LocalMonitor *) message;
4509 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4510 "Received tunnel info request from client %u for tunnel %s[%X]\n",
4513 ntohl (msg->tunnel_id));
4514 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
4517 /* We don't know the tunnel FIXME */
4518 struct GNUNET_MESH_LocalMonitor warn;
4521 GNUNET_SERVER_notification_context_unicast (nc, client,
4524 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4528 /* Initialize context */
4529 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
4531 GNUNET_PEER_resolve (t->dest, &resp->destination);
4532 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4533 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
4534 &resp->header, GNUNET_NO);
4537 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4538 "Monitor tunnel request from client %u completed\n",
4540 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4545 * Functions to handle messages from clients
4547 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4548 {&handle_local_new_client, NULL,
4549 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4550 {&handle_local_tunnel_create, NULL,
4551 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4552 sizeof (struct GNUNET_MESH_TunnelMessage)},
4553 {&handle_local_tunnel_destroy, NULL,
4554 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4555 sizeof (struct GNUNET_MESH_TunnelMessage)},
4556 {&handle_local_tunnel_buffer, NULL,
4557 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
4558 sizeof (struct GNUNET_MESH_TunnelMessage)},
4559 {&handle_local_tunnel_buffer, NULL,
4560 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
4561 sizeof (struct GNUNET_MESH_TunnelMessage)},
4562 {&handle_local_unicast, NULL,
4563 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4564 {&handle_local_to_origin, NULL,
4565 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4566 {&handle_local_ack, NULL,
4567 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
4568 sizeof (struct GNUNET_MESH_LocalAck)},
4569 {&handle_local_get_tunnels, NULL,
4570 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
4571 sizeof (struct GNUNET_MessageHeader)},
4572 {&handle_local_show_tunnel, NULL,
4573 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
4574 sizeof (struct GNUNET_MESH_LocalMonitor)},
4580 * Method called whenever a given peer connects.
4582 * @param cls closure
4583 * @param peer peer identity this notification is about
4586 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
4588 struct MeshPeerInfo *peer_info;
4589 struct MeshPeerPath *path;
4591 DEBUG_CONN ("Peer connected\n");
4592 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
4593 peer_info = peer_get (peer);
4594 if (myid == peer_info->id)
4596 DEBUG_CONN (" (self)\n");
4601 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
4603 path = path_new (2);
4604 path->peers[0] = myid;
4605 path->peers[1] = peer_info->id;
4606 GNUNET_PEER_change_rc (myid, 1);
4607 GNUNET_PEER_change_rc (peer_info->id, 1);
4608 peer_info_add_path (peer_info, path, GNUNET_YES);
4609 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
4615 * Method called whenever a peer disconnects.
4617 * @param cls closure
4618 * @param peer peer identity this notification is about
4621 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4623 struct MeshPeerInfo *pi;
4624 struct MeshPeerQueue *q;
4625 struct MeshPeerQueue *n;
4627 DEBUG_CONN ("Peer disconnected\n");
4628 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4638 /* TODO try to reroute this traffic instead */
4639 queue_destroy(q, GNUNET_YES);
4642 if (NULL != pi->core_transmit)
4644 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
4645 pi->core_transmit = NULL;
4647 peer_remove_path (pi, pi->id, myid);
4650 DEBUG_CONN (" (self)\n");
4652 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
4658 * Install server (service) handlers and start listening to clients.
4663 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4664 GNUNET_SERVER_disconnect_notify (server_handle,
4665 &handle_local_client_disconnect, NULL);
4666 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
4668 clients_head = NULL;
4669 clients_tail = NULL;
4671 GNUNET_SERVER_resume (server_handle);
4676 * To be called on core init/fail.
4678 * @param cls Closure (config)
4679 * @param server handle to the server for this service
4680 * @param identity the public identity of this peer
4683 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4684 const struct GNUNET_PeerIdentity *identity)
4686 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
4690 GNUNET_break (core_handle == server);
4691 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4694 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
4695 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4697 GNUNET_i2s (identity));
4698 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4700 GNUNET_i2s (&my_full_id));
4701 GNUNET_CORE_disconnect (core_handle);
4702 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4703 NULL, /* Closure passed to MESH functions */
4704 &core_init, /* Call core_init once connected */
4705 &core_connect, /* Handle connects */
4706 &core_disconnect, /* remove peers on disconnects */
4707 NULL, /* Don't notify about all incoming messages */
4708 GNUNET_NO, /* For header only in notification */
4709 NULL, /* Don't notify about all outbound messages */
4710 GNUNET_NO, /* For header-only out notification */
4711 core_handlers); /* Register these handlers */
4720 /******************************************************************************/
4721 /************************ MAIN FUNCTIONS ****************************/
4722 /******************************************************************************/
4725 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4727 * @param cls closure
4728 * @param key current key code
4729 * @param value value in the hash map
4730 * @return GNUNET_YES if we should continue to iterate,
4734 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
4736 struct MeshTunnel *t = value;
4743 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4745 * @param cls closure
4746 * @param key current key code
4747 * @param value value in the hash map
4748 * @return GNUNET_YES if we should continue to iterate,
4752 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
4754 struct MeshPeerInfo *p = value;
4755 struct MeshPeerQueue *q;
4756 struct MeshPeerQueue *n;
4764 queue_destroy(q, GNUNET_YES);
4768 peer_info_destroy (p);
4774 * Task run during shutdown.
4780 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
4784 if (core_handle != NULL)
4786 GNUNET_CORE_disconnect (core_handle);
4791 GNUNET_CRYPTO_ecc_key_create_stop (keygen);
4794 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4795 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4796 if (dht_handle != NULL)
4798 GNUNET_DHT_disconnect (dht_handle);
4803 GNUNET_SERVER_notification_context_destroy (nc);
4806 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4808 GNUNET_SCHEDULER_cancel (announce_id_task);
4809 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4811 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
4816 * Callback for hostkey read/generation.
4818 * @param cls Closure (Configuration handle).
4819 * @param pk The ECC private key.
4820 * @param emsg Error message, if any.
4823 key_generation_cb (void *cls,
4824 struct GNUNET_CRYPTO_EccPrivateKey *pk,
4827 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4828 struct MeshPeerInfo *peer;
4829 struct MeshPeerPath *p;
4834 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4835 _("Could not access hostkey: %s. Exiting.\n"),
4837 GNUNET_SCHEDULER_shutdown ();
4840 my_private_key = pk;
4841 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
4842 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4843 &my_full_id.hashPubKey);
4844 myid = GNUNET_PEER_intern (&my_full_id);
4845 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4846 "Mesh for peer [%s] starting\n",
4847 GNUNET_i2s(&my_full_id));
4849 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4850 NULL, /* Closure passed to MESH functions */
4851 &core_init, /* Call core_init once connected */
4852 &core_connect, /* Handle connects */
4853 &core_disconnect, /* remove peers on disconnects */
4854 NULL, /* Don't notify about all incoming messages */
4855 GNUNET_NO, /* For header only in notification */
4856 NULL, /* Don't notify about all outbound messages */
4857 GNUNET_NO, /* For header-only out notification */
4858 core_handlers); /* Register these handlers */
4859 if (core_handle == NULL)
4862 GNUNET_SCHEDULER_shutdown ();
4867 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4869 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4871 /* Create a peer_info for the local peer */
4872 peer = peer_get (&my_full_id);
4875 GNUNET_PEER_change_rc (myid, 1);
4876 peer_info_add_path (peer, p, GNUNET_YES);
4878 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
4883 * Process mesh requests.
4885 * @param cls closure
4886 * @param server the initialized server
4887 * @param c configuration to use
4890 run (void *cls, struct GNUNET_SERVER_Handle *server,
4891 const struct GNUNET_CONFIGURATION_Handle *c)
4895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
4896 server_handle = server;
4897 GNUNET_SERVER_suspend (server_handle);
4900 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
4903 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4905 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4906 "mesh", "peer/privatekey");
4907 GNUNET_SCHEDULER_shutdown ();
4912 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
4913 &refresh_path_time))
4915 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4917 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4918 "mesh", "refresh path time");
4919 GNUNET_SCHEDULER_shutdown ();
4924 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
4927 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4929 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4930 "mesh", "id announce time");
4931 GNUNET_SCHEDULER_shutdown ();
4936 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
4939 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4941 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4942 "mesh", "connect timeout");
4943 GNUNET_SCHEDULER_shutdown ();
4948 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
4951 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4953 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4954 "mesh", "max msgs queue");
4955 GNUNET_SCHEDULER_shutdown ();
4960 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
4963 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4965 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4966 "mesh", "max tunnels");
4967 GNUNET_SCHEDULER_shutdown ();
4972 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
4975 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4977 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4978 "mesh", "default ttl", 64);
4983 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
4986 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4987 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4988 "mesh", "max peers", 1000);
4993 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
4994 &dht_replication_level))
4996 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4998 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
4999 "mesh", "dht replication level", 3);
5000 dht_replication_level = 3;
5003 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5004 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5005 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5006 ports = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5008 dht_handle = GNUNET_DHT_connect (c, 64);
5009 if (NULL == dht_handle)
5013 stats = GNUNET_STATISTICS_create ("mesh", c);
5015 /* Scheduled the task to clean up when shutdown is called */
5016 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5018 keygen = GNUNET_CRYPTO_ecc_key_create_start (keyfile,
5021 GNUNET_free (keyfile);
5026 * The main function for the mesh service.
5028 * @param argc number of arguments from the command line
5029 * @param argv command line arguments
5030 * @return 0 ok, 1 on error
5033 main (int argc, char *const *argv)
5038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5039 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5041 ret = (GNUNET_OK == r) ? 0 : 1;
5042 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
5046 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5047 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
5048 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);