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_PATH_ACK:
1969 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1970 t->force_ack = GNUNET_YES;
1976 /* Check if we need to transmit the ACK */
1977 if (t->queue_max > t->next_fc.queue_n * 4 &&
1978 GMC_is_pid_bigger(t->prev_fc.last_ack_sent, t->prev_fc.last_pid_recv) &&
1979 GNUNET_NO == t->force_ack)
1981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
1982 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1983 " t->qmax: %u, t->qn: %u\n",
1984 t->queue_max, t->next_fc.queue_n);
1985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1986 " t->pid: %u, t->ack: %u\n",
1987 t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent);
1991 /* Ok, ACK might be necessary, what PID to ACK? */
1992 ack = t->prev_fc.last_pid_recv + t->queue_max - t->next_fc.queue_n;
1993 if (ack == t->prev_fc.last_ack_sent && GNUNET_NO == t->force_ack)
1995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
1999 t->prev_fc.last_ack_sent = ack;
2000 if (NULL != t->owner)
2001 send_local_ack (t, t->owner, ack);
2002 else if (0 != t->prev_hop)
2003 send_ack (t, t->prev_hop, ack);
2007 t->force_ack = GNUNET_NO;
2012 * Send an ACK informing the children node/client about the available
2014 * If buffering is off, send only on behalf of root (can be self).
2015 * If buffering is on, send when sent to predecessor and buffer space is free.
2016 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
2017 * the ACK itself goes "forward" (towards children/clients).
2019 * @param t Tunnel on which to send the ACK.
2020 * @param type Type of message that triggered the ACK transmission.
2023 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
2026 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2027 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
2028 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
2029 /* Is it after data to_origin retransmission? */
2032 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2033 if (GNUNET_YES == t->nobuffer)
2035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2036 " Not sending ACK, nobuffer + traffic\n");
2040 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2041 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2043 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2044 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2045 t->force_ack = GNUNET_YES;
2051 /* TODO: Check if we need to transmit the ACK (as in fwd) */
2053 ack = t->next_fc.last_pid_recv + t->queue_max - t->prev_fc.queue_n;
2055 if (t->next_fc.last_ack_sent == ack && GNUNET_NO == t->force_ack)
2057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2058 " Not sending ACK, not needed\n");
2061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2062 " Sending BCK ACK %u (last sent: %u)\n",
2063 ack, t->next_fc.last_ack_sent);
2064 t->next_fc.last_ack_sent = ack;
2066 if (NULL != t->client)
2067 send_local_ack (t, t->client, ack);
2068 else if (0 != t->next_hop)
2069 send_ack (t, t->next_hop, ack);
2072 t->force_ack = GNUNET_NO;
2077 * Modify the unicast message TID from global to local and send to client.
2079 * @param t Tunnel on which to send the message.
2080 * @param msg Message to modify and send.
2083 tunnel_send_client_ucast (struct MeshTunnel *t,
2084 const struct GNUNET_MESH_Unicast *msg)
2086 struct GNUNET_MESH_Unicast *copy;
2087 uint16_t size = ntohs (msg->header.size);
2090 if (size < sizeof (struct GNUNET_MESH_Unicast) +
2091 sizeof (struct GNUNET_MessageHeader))
2093 GNUNET_break_op (0);
2096 if (NULL == t->client)
2101 copy = (struct GNUNET_MESH_Unicast *) cbuf;
2102 memcpy (copy, msg, size);
2103 copy->tid = htonl (t->local_tid_dest);
2104 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
2105 ©->header, GNUNET_NO);
2110 * Modify the to_origin message TID from global to local and send to client.
2112 * @param t Tunnel on which to send the message.
2113 * @param msg Message to modify and send.
2116 tunnel_send_client_to_orig (struct MeshTunnel *t,
2117 const struct GNUNET_MESH_ToOrigin *msg)
2119 struct GNUNET_MESH_ToOrigin *copy;
2120 uint16_t size = ntohs (msg->header.size);
2123 if (size < sizeof (struct GNUNET_MESH_ToOrigin) +
2124 sizeof (struct GNUNET_MessageHeader))
2126 GNUNET_break_op (0);
2129 if (NULL == t->owner)
2134 copy = (struct GNUNET_MESH_ToOrigin *) cbuf;
2135 memcpy (cbuf, msg, size);
2136 copy->tid = htonl (t->local_tid);
2137 GNUNET_SERVER_notification_context_unicast (nc, t->owner->handle,
2138 ©->header, GNUNET_NO);
2143 * @brief Re-initiate traffic to this peer if necessary.
2145 * Check if there is traffic queued towards this peer
2146 * and the core transmit handle is NULL (traffic was stalled).
2147 * If so, call core tmt rdy.
2149 * @param peer_id Short ID of peer to which initiate traffic.
2152 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2154 struct MeshPeerInfo *peer;
2155 struct GNUNET_PeerIdentity id;
2156 struct MeshPeerQueue *q;
2159 peer = peer_get_short (peer_id);
2160 if (NULL != peer->core_transmit)
2163 q = queue_get_next (peer);
2166 /* Might br multicast traffic already sent to this particular peer but
2167 * not to other children in this tunnel.
2168 * This way t->queue_n would be > 0 but the queue of this particular peer
2174 GNUNET_PEER_resolve (peer->id, &id);
2175 peer->core_transmit =
2176 GNUNET_CORE_notify_transmit_ready(core_handle,
2179 GNUNET_TIME_UNIT_FOREVER_REL,
2189 * Send a message to all peers in this tunnel that the tunnel is no longer
2192 * @param t The tunnel whose peers to notify.
2195 tunnel_send_destroy (struct MeshTunnel *t)
2197 struct GNUNET_MESH_TunnelDestroy msg;
2198 struct GNUNET_PeerIdentity id;
2200 msg.header.size = htons (sizeof (msg));
2201 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2202 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2203 msg.tid = htonl (t->id.tid);
2204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2205 " sending tunnel destroy for tunnel: %s [%X]\n",
2206 GNUNET_i2s (&msg.oid), t->id.tid);
2208 if (NULL == t->client && 0 != t->next_hop)
2210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2211 GNUNET_PEER_resolve (t->next_hop, &id);
2212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2213 " sending forward to %s\n",
2215 send_prebuilt_message (&msg.header, t->next_hop, t);
2217 if (NULL == t->owner && 0 != t->prev_hop)
2219 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2220 GNUNET_PEER_resolve (t->prev_hop, &id);
2221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2222 " sending back to %s\n",
2224 send_prebuilt_message (&msg.header, t->prev_hop, t);
2230 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2232 * @param t Tunnel which to cancel.
2233 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2236 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2238 struct MeshPeerInfo *peer_info;
2239 struct MeshPeerQueue *pq;
2240 struct MeshPeerQueue *next;
2242 peer_info = peer_get_short (neighbor);
2243 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2246 if (pq->tunnel == t)
2248 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2249 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2251 /* Should have been removed on destroy children */
2254 queue_destroy (pq, GNUNET_YES);
2257 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2259 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2260 peer_info->core_transmit = NULL;
2266 * Destroy the tunnel and free any allocated resources linked to it.
2268 * @param t the tunnel to destroy
2270 * @return GNUNET_OK on success
2273 tunnel_destroy (struct MeshTunnel *t)
2275 struct MeshClient *c;
2276 struct GNUNET_HashCode hash;
2286 struct GNUNET_PeerIdentity id;
2288 GNUNET_PEER_resolve (t->id.oid, &id);
2289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2290 GNUNET_i2s (&id), t->id.tid);
2292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2296 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2297 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2305 GMC_hash32 (t->local_tid, &hash);
2307 GNUNET_CONTAINER_multihashmap_remove (c->own_tunnels, &hash, t))
2314 if (NULL != t->client)
2317 GMC_hash32 (t->local_tid_dest, &hash);
2319 GNUNET_CONTAINER_multihashmap_remove (c->incoming_tunnels, &hash, t))
2325 GNUNET_CONTAINER_multihashmap_remove (incoming_tunnels, &hash, t))
2332 peer_cancel_queues (t->next_hop, t);
2333 peer_cancel_queues (t->prev_hop, t);
2334 GNUNET_PEER_change_rc(t->next_hop, -1);
2335 GNUNET_PEER_change_rc(t->prev_hop, -1);
2337 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2338 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2341 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2342 path_destroy (t->path);
2348 * Tunnel is empty: destroy it.
2350 * @param t Tunnel to destroy.
2353 tunnel_destroy_empty (struct MeshTunnel *t)
2357 struct GNUNET_PeerIdentity id;
2359 GNUNET_PEER_resolve (t->id.oid, &id);
2360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2361 "executing destruction of empty tunnel %s [%X]\n",
2362 GNUNET_i2s (&id), t->id.tid);
2366 if (GNUNET_NO == t->destroy)
2367 tunnel_send_destroy (t);
2368 if (0 == t->pending_messages)
2371 t->destroy = GNUNET_YES;
2375 * Initialize a Flow Control structure to the initial state.
2377 * @param fc Flow Control structure to initialize.
2380 fc_init (struct MeshFlowControl *fc)
2382 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2383 fc->last_pid_recv = (uint32_t) -1;
2384 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
2385 fc->last_ack_recv = (uint32_t) -1;
2386 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2387 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2392 * Create a new tunnel
2394 * @param owner Who is the owner of the tunnel (short ID).
2395 * @param tid Tunnel Number of the tunnel.
2396 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2397 * @param local Tunnel Number for the tunnel, for the client point of view.
2399 * @return A new initialized tunnel. NULL on error.
2401 static struct MeshTunnel *
2402 tunnel_new (GNUNET_PEER_Id owner,
2403 MESH_TunnelNumber tid,
2404 struct MeshClient *client,
2405 MESH_TunnelNumber local)
2407 struct MeshTunnel *t;
2408 struct GNUNET_HashCode hash;
2410 if (n_tunnels >= max_tunnels && NULL == client)
2413 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2416 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2418 fc_init (&t->next_fc);
2419 fc_init (&t->prev_fc);
2420 t->local_tid = local;
2422 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2424 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2426 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2427 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2434 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2441 GMC_hash32 (t->local_tid, &hash);
2443 GNUNET_CONTAINER_multihashmap_put (client->own_tunnels, &hash, t,
2444 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2448 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2459 * tunnel_destroy_iterator: iterator for deleting each tunnel that belongs to a
2460 * client when the client disconnects. If the client is not the owner, the
2461 * owner will get notified if no more clients are in the tunnel and the client
2462 * get removed from the tunnel's list.
2464 * @param cls closure (client that is disconnecting)
2465 * @param key the hash of the local tunnel id (used to access the hashmap)
2466 * @param value the value stored at the key (tunnel to destroy)
2468 * @return GNUNET_OK, keep iterating.
2471 tunnel_destroy_iterator (void *cls,
2472 const struct GNUNET_HashCode * key,
2475 struct MeshTunnel *t = value;
2476 struct MeshClient *c = cls;
2478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2479 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
2480 t->local_tid, t->local_tid_dest, c->id);
2481 if (GNUNET_NO == c->shutting_down)
2482 send_client_tunnel_destroy (t);
2483 client_delete_tunnel (c, t);
2486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
2490 else if (c == t->owner)
2492 struct MeshPeerInfo *p;
2493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
2496 p = peer_get_short(t->dest);
2497 peer_info_remove_tunnel (p, t);
2503 tunnel_destroy_empty (t);
2510 * Timeout function, destroys tunnel if called
2512 * @param cls Closure (tunnel to destroy).
2513 * @param tc TaskContext
2516 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2518 struct MeshTunnel *t = cls;
2519 struct GNUNET_PeerIdentity id;
2521 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2522 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2524 GNUNET_PEER_resolve(t->id.oid, &id);
2525 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2526 "Tunnel %s [%X] timed out. Destroying.\n",
2527 GNUNET_i2s(&id), t->id.tid);
2528 send_client_tunnel_destroy (t);
2534 * Resets the tunnel timeout. Starts it if no timeout was running.
2536 * @param t Tunnel whose timeout to reset.
2538 * TODO use heap to improve efficiency of scheduler.
2541 tunnel_reset_timeout (struct MeshTunnel *t)
2543 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
2545 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2546 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2547 t->maintenance_task =
2548 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
2549 (refresh_path_time, 4), &tunnel_timeout, t);
2553 /******************************************************************************/
2554 /**************** MESH NETWORK HANDLER HELPERS ***********************/
2555 /******************************************************************************/
2558 * Function to send a create path packet to a peer.
2560 * @param cls closure
2561 * @param size number of bytes available in buf
2562 * @param buf where the callee should write the message
2563 * @return number of bytes written to buf
2566 send_core_path_create (void *cls, size_t size, void *buf)
2568 struct MeshTunnel *t = cls;
2569 struct GNUNET_MESH_CreateTunnel *msg;
2570 struct GNUNET_PeerIdentity *peer_ptr;
2571 struct MeshPeerPath *p = t->path;
2576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
2578 sizeof (struct GNUNET_MESH_CreateTunnel) +
2579 p->length * sizeof (struct GNUNET_PeerIdentity);
2581 if (size < size_needed || NULL == buf)
2586 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
2587 msg->header.size = htons (size_needed);
2588 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
2589 msg->tid = ntohl (t->id.tid);
2592 if (GNUNET_YES == t->nobuffer)
2593 opt |= MESH_TUNNEL_OPT_NOBUFFER;
2594 msg->opt = htonl (opt);
2595 msg->port = htonl (t->port);
2597 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2598 for (i = 0; i < p->length; i++)
2600 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2604 "CREATE PATH (%u bytes long) sent!\n", size_needed);
2610 * Creates a path ack message in buf and frees all unused resources.
2612 * @param cls closure (MeshTransmissionDescriptor)
2613 * @param size number of bytes available in buf
2614 * @param buf where the callee should write the message
2615 * @return number of bytes written to buf
2618 send_core_path_ack (void *cls, size_t size, void *buf)
2620 struct MeshTunnel *t = cls;
2621 struct GNUNET_MESH_PathACK *msg = buf;
2623 GNUNET_assert (NULL != t);
2624 if (sizeof (struct GNUNET_MESH_PathACK) > size)
2629 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
2630 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
2631 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
2632 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
2633 msg->tid = htonl (t->id.tid);
2634 msg->peer_id = my_full_id;
2635 msg->ack = htonl (t->prev_fc.last_ack_sent);
2637 /* TODO add signature */
2639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
2640 return sizeof (struct GNUNET_MESH_PathACK);
2645 * Free a transmission that was already queued with all resources
2646 * associated to the request.
2648 * @param queue Queue handler to cancel.
2649 * @param clear_cls Is it necessary to free associated cls?
2652 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
2654 struct MeshFlowControl *fc;
2656 if (GNUNET_YES == clear_cls)
2658 switch (queue->type)
2660 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2661 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
2662 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
2664 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2665 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2666 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2667 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2668 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2670 " prebuilt message\n");
2671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2673 GNUNET_MESH_DEBUG_M2S (queue->type));
2675 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
2680 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
2681 " type %s unknown!\n",
2682 GNUNET_MESH_DEBUG_M2S (queue->type));
2684 GNUNET_free_non_null (queue->cls);
2686 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
2687 queue->peer->queue_tail,
2690 /* Delete from appropiate fc in the tunnel */
2691 if (queue->peer->id == queue->tunnel->next_hop)
2692 fc = &queue->tunnel->next_fc;
2693 else if (queue->peer->id == queue->tunnel->next_hop)
2694 fc = &queue->tunnel->next_fc;
2701 GNUNET_free (queue);
2706 * @brief Get the next transmittable message from the queue.
2708 * This will be the head, except in the case of being a data packet
2709 * not allowed by the destination peer.
2711 * @param peer Destination peer.
2713 * @return The next viable MeshPeerQueue element to send to that peer.
2714 * NULL when there are no transmittable messages.
2716 struct MeshPeerQueue *
2717 queue_get_next (const struct MeshPeerInfo *peer)
2719 struct MeshPeerQueue *q;
2721 struct GNUNET_MESH_Unicast *ucast;
2722 struct GNUNET_MESH_ToOrigin *to_orig;
2723 struct MeshTunnel* t;
2727 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
2728 for (q = peer->queue_head; NULL != q; q = q->next)
2731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2733 GNUNET_MESH_DEBUG_M2S(q->type));
2736 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2737 ucast = (struct GNUNET_MESH_Unicast *) q->cls;
2738 pid = ntohl (ucast->pid);
2739 ack = t->next_fc.last_ack_recv;
2741 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2742 to_orig = (struct GNUNET_MESH_ToOrigin *) q->cls;
2743 pid = ntohl (to_orig->pid);
2744 ack = t->prev_fc.last_ack_recv;
2747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2752 "* ACK: %u, PID: %u\n",
2754 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
2756 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2762 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2767 "* nothing found\n");
2773 queue_send (void *cls, size_t size, void *buf)
2775 struct MeshPeerInfo *peer = cls;
2776 struct GNUNET_MessageHeader *msg;
2777 struct MeshPeerQueue *queue;
2778 struct MeshTunnel *t;
2779 struct GNUNET_PeerIdentity dst_id;
2780 struct MeshFlowControl *fc;
2784 peer->core_transmit = NULL;
2786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
2787 queue = queue_get_next (peer);
2789 /* Queue has no internal mesh traffic nor sendable payload */
2792 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
2793 if (NULL == peer->queue_head)
2794 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
2797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
2799 GNUNET_PEER_resolve (peer->id, &dst_id);
2800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2802 GNUNET_i2s (&dst_id));
2803 /* Check if buffer size is enough for the message */
2804 if (queue->size > size)
2806 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2807 "* not enough room, reissue\n");
2808 peer->core_transmit =
2809 GNUNET_CORE_notify_transmit_ready (core_handle,
2812 GNUNET_TIME_UNIT_FOREVER_REL,
2819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
2822 GNUNET_assert (0 < t->pending_messages);
2823 t->pending_messages--;
2827 switch (queue->type)
2830 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2831 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2832 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
2833 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
2834 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
2835 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
2836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2838 GNUNET_MESH_DEBUG_M2S (queue->type));
2840 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2841 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2842 data_size = send_core_data_raw (queue->cls, size, buf);
2843 msg = (struct GNUNET_MessageHeader *) buf;
2844 type = ntohs (msg->type);
2846 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
2847 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
2848 data_size = send_core_path_create (queue->cls, size, buf);
2850 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
2852 data_size = send_core_path_ack (queue->cls, size, buf);
2856 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2857 "* type unknown: %u\n",
2862 /* Free queue, but cls was freed by send_core_* */
2863 queue_destroy (queue, GNUNET_NO);
2865 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
2868 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2869 t->next_fc.last_pid_sent = ((struct GNUNET_MESH_Unicast *) buf)->pid;
2870 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
2872 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2873 t->prev_fc.last_pid_sent = ((struct GNUNET_MESH_ToOrigin *) buf)->pid;
2874 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
2880 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
2882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
2886 /* If more data in queue, send next */
2887 queue = queue_get_next (peer);
2890 struct GNUNET_PeerIdentity id;
2892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
2893 GNUNET_PEER_resolve (peer->id, &id);
2894 peer->core_transmit =
2895 GNUNET_CORE_notify_transmit_ready(core_handle,
2898 GNUNET_TIME_UNIT_FOREVER_REL,
2904 else if (NULL != peer->queue_head)
2906 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2908 GNUNET_i2s (&my_full_id));
2909 if (peer->id == t->next_hop)
2911 else if (peer->id == t->prev_hop)
2918 if (NULL != fc && GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
2921 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
2931 * @brief Queue and pass message to core when possible.
2933 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
2934 * accounts for it. In case the queue is full, the message is dropped and
2937 * Otherwise, message is treated as internal and allowed to go regardless of
2940 * @param cls Closure (@c type dependant). It will be used by queue_send to
2941 * build the message to be sent if not already prebuilt.
2942 * @param type Type of the message, 0 for a raw message.
2943 * @param size Size of the message.
2944 * @param dst Neighbor to send message to.
2945 * @param t Tunnel this message belongs to.
2948 queue_add (void *cls, uint16_t type, size_t size,
2949 struct MeshPeerInfo *dst, struct MeshTunnel *t)
2951 struct MeshPeerQueue *queue;
2952 struct GNUNET_PeerIdentity id;
2956 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
2958 n = &t->next_fc.queue_n;
2960 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
2962 n = &t->prev_fc.queue_n;
2966 if (*n >= t->queue_max)
2969 GNUNET_STATISTICS_update(stats,
2970 "# messages dropped (buffer full)",
2972 return; /* Drop message */
2976 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
2982 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
2983 if (NULL == dst->core_transmit)
2985 GNUNET_PEER_resolve (dst->id, &id);
2986 dst->core_transmit =
2987 GNUNET_CORE_notify_transmit_ready (core_handle,
2990 GNUNET_TIME_UNIT_FOREVER_REL,
2996 t->pending_messages++;
3000 /******************************************************************************/
3001 /******************** MESH NETWORK HANDLERS **************************/
3002 /******************************************************************************/
3006 * Core handler for path creation
3008 * @param cls closure
3009 * @param message message
3010 * @param peer peer identity this notification is about
3012 * @return GNUNET_OK to keep the connection open,
3013 * GNUNET_SYSERR to close it (signal serious error)
3016 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3017 const struct GNUNET_MessageHeader *message)
3019 unsigned int own_pos;
3022 MESH_TunnelNumber tid;
3023 struct GNUNET_MESH_CreateTunnel *msg;
3024 struct GNUNET_PeerIdentity *pi;
3025 struct MeshPeerPath *path;
3026 struct MeshPeerInfo *dest_peer_info;
3027 struct MeshPeerInfo *orig_peer_info;
3028 struct MeshTunnel *t;
3030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3031 "Received a path create msg [%s]\n",
3032 GNUNET_i2s (&my_full_id));
3033 size = ntohs (message->size);
3034 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3036 GNUNET_break_op (0);
3040 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3041 if (size % sizeof (struct GNUNET_PeerIdentity))
3043 GNUNET_break_op (0);
3046 size /= sizeof (struct GNUNET_PeerIdentity);
3049 GNUNET_break_op (0);
3052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3053 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3055 tid = ntohl (msg->tid);
3056 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3058 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
3059 t = tunnel_get (pi, tid);
3060 if (NULL == t) /* might be a local tunnel */
3064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3065 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3071 t->port = ntohl (msg->port);
3072 opt = ntohl (msg->opt);
3073 if (0 != (opt & MESH_TUNNEL_OPT_NOBUFFER))
3075 t->nobuffer = GNUNET_YES;
3076 t->prev_fc.last_ack_sent = t->prev_fc.last_pid_recv + 1;
3077 t->next_fc.last_ack_sent = t->next_fc.last_pid_recv + 1;
3080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3082 tunnel_reset_timeout (t);
3084 t->state = MESH_TUNNEL_WAITING;
3086 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3087 if (NULL == dest_peer_info)
3089 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3090 " Creating PeerInfo for destination.\n");
3091 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3092 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3093 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3095 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3097 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3098 if (NULL == orig_peer_info)
3100 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3101 " Creating PeerInfo for origin.\n");
3102 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3103 orig_peer_info->id = GNUNET_PEER_intern (pi);
3104 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3105 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3108 path = path_new (size);
3110 for (i = 0; i < size; i++)
3112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3113 GNUNET_i2s (&pi[i]));
3114 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3115 if (path->peers[i] == myid)
3118 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3119 if (own_pos == 0 && path->peers[own_pos] != myid)
3121 /* create path: self not found in path through self */
3122 GNUNET_break_op (0);
3123 path_destroy (path);
3127 path_add_to_peers (path, GNUNET_NO);
3128 tunnel_use_path (t, path);
3130 if (own_pos == size - 1)
3132 struct MeshClient *c;
3133 struct GNUNET_HashCode hc;
3135 /* Find target client */
3136 GMC_hash32 (t->port, &hc);
3137 c = GNUNET_CONTAINER_multihashmap_get (ports, &hc);
3140 /* TODO send reject */
3144 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3145 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3148 /* Assign local tid */
3149 while (NULL != tunnel_get_incoming (next_local_tid))
3150 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3151 t->local_tid_dest = next_local_tid++;
3152 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3154 tunnel_add_client (t, c);
3155 send_client_tunnel_create (t);
3160 struct MeshPeerPath *path2;
3162 t->next_hop = path->peers[own_pos + 1];
3163 GNUNET_PEER_change_rc(t->next_hop, 1);
3165 /* It's for somebody else! Retransmit. */
3166 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3167 path2 = path_duplicate (path);
3168 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3169 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3170 send_create_path (t);
3178 * Core handler for path ACKs
3180 * @param cls closure
3181 * @param message message
3182 * @param peer peer identity this notification is about
3184 * @return GNUNET_OK to keep the connection open,
3185 * GNUNET_SYSERR to close it (signal serious error)
3188 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3189 const struct GNUNET_MessageHeader *message)
3191 struct GNUNET_MESH_PathACK *msg;
3192 struct MeshPeerInfo *peer_info;
3193 struct MeshPeerPath *p;
3194 struct MeshTunnel *t;
3196 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3197 GNUNET_i2s (&my_full_id));
3198 msg = (struct GNUNET_MESH_PathACK *) message;
3199 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3202 /* TODO notify that we don't know the tunnel */
3203 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3205 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3209 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3211 peer_info = peer_get (&msg->peer_id);
3212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3213 GNUNET_i2s (&msg->peer_id));
3214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3217 /* Add path to peers? */
3221 path_add_to_peers (p, GNUNET_YES);
3227 t->state = MESH_TUNNEL_READY;
3228 t->next_fc.last_ack_recv = ntohl (msg->ack);
3229 t->prev_fc.last_ack_sent = ntohl (msg->ack);
3231 /* Message for us? */
3232 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3235 if (NULL == t->owner)
3237 GNUNET_break_op (0);
3240 if (NULL != peer_info->dhtget)
3242 GNUNET_DHT_get_stop (peer_info->dhtget);
3243 peer_info->dhtget = NULL;
3245 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3246 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3251 " not for us, retransmitting...\n");
3252 peer_info = peer_get (&msg->oid);
3253 send_prebuilt_message (message, t->prev_hop, t);
3259 * Core handler for notifications of broken paths
3261 * @param cls closure
3262 * @param message message
3263 * @param peer peer identity this notification is about
3265 * @return GNUNET_OK to keep the connection open,
3266 * GNUNET_SYSERR to close it (signal serious error)
3269 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3270 const struct GNUNET_MessageHeader *message)
3272 struct GNUNET_MESH_PathBroken *msg;
3273 struct MeshTunnel *t;
3275 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3276 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3277 msg = (struct GNUNET_MESH_PathBroken *) message;
3278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3279 GNUNET_i2s (&msg->peer1));
3280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3281 GNUNET_i2s (&msg->peer2));
3282 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3285 GNUNET_break_op (0);
3288 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3289 GNUNET_PEER_search (&msg->peer2));
3296 * Core handler for tunnel destruction
3298 * @param cls closure
3299 * @param message message
3300 * @param peer peer identity this notification is about
3302 * @return GNUNET_OK to keep the connection open,
3303 * GNUNET_SYSERR to close it (signal serious error)
3306 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3307 const struct GNUNET_MessageHeader *message)
3309 struct GNUNET_MESH_TunnelDestroy *msg;
3310 struct MeshTunnel *t;
3312 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3314 "Got a TUNNEL DESTROY packet from %s\n",
3316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3317 " for tunnel %s [%u]\n",
3318 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3319 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3322 /* Probably already got the message from another path,
3323 * destroyed the tunnel and retransmitted to children.
3326 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3330 // TODO check owner's signature
3331 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3333 /* Tunnel was incoming, notify clients */
3334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3335 t->local_tid, t->local_tid_dest);
3336 send_client_tunnel_destroy (t);
3338 tunnel_send_destroy (t);
3339 t->destroy = GNUNET_YES;
3340 // TODO: add timeout to destroy the tunnel anyway
3346 * Core handler for mesh network traffic going from the origin to a peer
3348 * @param cls closure
3349 * @param peer peer identity this notification is about
3350 * @param message message
3351 * @return GNUNET_OK to keep the connection open,
3352 * GNUNET_SYSERR to close it (signal serious error)
3355 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3356 const struct GNUNET_MessageHeader *message)
3358 struct GNUNET_MESH_Unicast *msg;
3359 struct MeshTunnel *t;
3364 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3367 size = ntohs (message->size);
3369 sizeof (struct GNUNET_MESH_Unicast) +
3370 sizeof (struct GNUNET_MessageHeader))
3375 msg = (struct GNUNET_MESH_Unicast *) message;
3376 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3377 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3379 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3382 /* TODO notify back: we don't know this tunnel */
3383 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3384 GNUNET_break_op (0);
3387 pid = ntohl (msg->pid);
3388 if (t->prev_fc.last_pid_recv == pid)
3390 GNUNET_STATISTICS_update (stats, "# duplicate PID drops", 1, GNUNET_NO);
3391 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3392 " Already seen pid %u, DROPPING!\n", pid);
3397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3398 " pid %u not seen yet, forwarding\n", pid);
3401 if (GMC_is_pid_bigger (pid, t->prev_fc.last_ack_sent))
3403 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3404 GNUNET_break_op (0);
3405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3406 "Received PID %u, ACK %u\n",
3407 pid, t->prev_fc.last_ack_sent);
3408 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3411 t->prev_fc.last_pid_recv = pid;
3413 tunnel_reset_timeout (t);
3414 if (t->dest == myid)
3416 /* TODO signature verification */
3417 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3418 " it's for us! sending to clients...\n");
3419 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
3420 tunnel_send_client_ucast (t, msg);
3421 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3424 if (0 == t->next_hop)
3429 ttl = ntohl (msg->ttl);
3430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
3433 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
3434 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
3435 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3439 " not for us, retransmitting...\n");
3441 send_prebuilt_message (message, t->next_hop, t);
3442 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
3448 * Core handler for mesh network traffic toward the owner of a tunnel
3450 * @param cls closure
3451 * @param message message
3452 * @param peer peer identity this notification is about
3454 * @return GNUNET_OK to keep the connection open,
3455 * GNUNET_SYSERR to close it (signal serious error)
3458 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
3459 const struct GNUNET_MessageHeader *message)
3461 struct GNUNET_MESH_ToOrigin *msg;
3462 struct MeshTunnel *t;
3466 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
3468 size = ntohs (message->size);
3469 if (size < sizeof (struct GNUNET_MESH_ToOrigin) + /* Payload must be */
3470 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
3472 GNUNET_break_op (0);
3475 msg = (struct GNUNET_MESH_ToOrigin *) message;
3476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3477 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3478 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3479 pid = ntohl (msg->pid);
3483 /* TODO notify that we dont know this tunnel (whom)? */
3484 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3486 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
3487 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3491 if (t->next_fc.last_pid_recv == pid)
3493 /* already seen this packet, drop */
3494 GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
3495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3496 " Already seen pid %u, DROPPING!\n", pid);
3497 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3501 if (GMC_is_pid_bigger (pid, t->next_fc.last_ack_sent))
3503 GNUNET_STATISTICS_update (stats, "# unsolicited to_orig", 1, GNUNET_NO);
3504 GNUNET_break_op (0);
3505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3506 "Received PID %u, ACK %u\n",
3507 pid, t->next_fc.last_ack_sent);
3508 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3511 t->next_fc.last_pid_recv = pid;
3512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3513 " pid %u not seen yet, forwarding\n", pid);
3515 if (myid == t->id.oid)
3517 /* TODO signature verification */
3518 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3519 " it's for us! sending to clients...\n");
3520 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
3521 tunnel_send_client_to_orig (t, msg);
3522 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
3525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3526 " not for us, retransmitting...\n");
3528 if (0 == t->prev_hop) /* No owner AND no prev hop */
3530 if (GNUNET_YES == t->destroy)
3532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3533 "to orig received on a dying tunnel %s [%X]\n",
3534 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3537 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3538 "unknown to origin at %s\n",
3539 GNUNET_i2s (&my_full_id));
3540 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3543 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3544 "on tunnel %s [%X]\n",
3545 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3548 send_prebuilt_message (message, t->prev_hop, t);
3549 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
3556 * Core handler for mesh network traffic point-to-point acks.
3558 * @param cls closure
3559 * @param message message
3560 * @param peer peer identity this notification is about
3562 * @return GNUNET_OK to keep the connection open,
3563 * GNUNET_SYSERR to close it (signal serious error)
3566 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3567 const struct GNUNET_MessageHeader *message)
3569 struct GNUNET_MESH_ACK *msg;
3570 struct MeshTunnel *t;
3574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
3576 msg = (struct GNUNET_MESH_ACK *) message;
3578 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3582 /* TODO notify that we dont know this tunnel (whom)? */
3583 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
3586 ack = ntohl (msg->pid);
3587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
3589 /* Is this a forward or backward ACK? */
3590 id = GNUNET_PEER_search (peer);
3591 if (t->next_hop == id)
3594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
3595 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task &&
3596 GMC_is_pid_bigger (ack, t->next_fc.last_ack_recv))
3598 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3599 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3600 t->next_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3602 t->next_fc.last_ack_recv = ack;
3603 peer_unlock_queue (t->next_hop);
3604 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3606 else if (t->prev_hop == id)
3609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
3610 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task &&
3611 GMC_is_pid_bigger (ack, t->prev_fc.last_ack_recv))
3613 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3614 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3615 t->prev_fc.poll_time = GNUNET_TIME_UNIT_SECONDS;
3617 t->prev_fc.last_ack_recv = ack;
3618 peer_unlock_queue (t->prev_hop);
3619 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
3622 GNUNET_break_op (0);
3628 * Core handler for mesh network traffic point-to-point ack polls.
3630 * @param cls closure
3631 * @param message message
3632 * @param peer peer identity this notification is about
3634 * @return GNUNET_OK to keep the connection open,
3635 * GNUNET_SYSERR to close it (signal serious error)
3638 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
3639 const struct GNUNET_MessageHeader *message)
3641 struct GNUNET_MESH_Poll *msg;
3642 struct MeshTunnel *t;
3645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
3648 msg = (struct GNUNET_MESH_Poll *) message;
3650 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3654 /* TODO notify that we dont know this tunnel (whom)? */
3655 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
3656 GNUNET_break_op (0);
3660 /* Is this a forward or backward ACK? */
3661 id = GNUNET_PEER_search(peer);
3662 if (t->next_hop == id)
3664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
3665 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3667 else if (t->prev_hop == id)
3669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
3670 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3680 * Core handler for mesh keepalives.
3682 * @param cls closure
3683 * @param message message
3684 * @param peer peer identity this notification is about
3685 * @return GNUNET_OK to keep the connection open,
3686 * GNUNET_SYSERR to close it (signal serious error)
3688 * TODO: Check who we got this from, to validate route.
3691 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
3692 const struct GNUNET_MessageHeader *message)
3694 struct GNUNET_MESH_TunnelKeepAlive *msg;
3695 struct MeshTunnel *t;
3697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
3700 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
3701 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3705 /* TODO notify that we dont know that tunnel */
3706 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
3711 tunnel_reset_timeout (t);
3713 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
3714 send_prebuilt_message (message, t->next_hop, t);
3721 * Functions to handle messages from core
3723 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
3724 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
3725 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
3726 sizeof (struct GNUNET_MESH_PathBroken)},
3727 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
3728 sizeof (struct GNUNET_MESH_TunnelDestroy)},
3729 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
3730 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
3731 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
3732 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
3733 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
3734 sizeof (struct GNUNET_MESH_ACK)},
3735 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
3736 sizeof (struct GNUNET_MESH_Poll)},
3737 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
3738 sizeof (struct GNUNET_MESH_PathACK)},
3744 /******************************************************************************/
3745 /**************** MESH LOCAL HANDLER HELPERS ***********************/
3746 /******************************************************************************/
3751 * notify_client_connection_failure: notify a client that the connection to the
3752 * requested remote peer is not possible (for instance, no route found)
3753 * Function called when the socket is ready to queue more data. "buf" will be
3754 * NULL and "size" zero if the socket was closed for writing in the meantime.
3756 * @param cls closure
3757 * @param size number of bytes available in buf
3758 * @param buf where the callee should write the message
3759 * @return number of bytes written to buf
3762 notify_client_connection_failure (void *cls, size_t size, void *buf)
3765 struct MeshPeerInfo *peer_info;
3766 struct GNUNET_MESH_PeerControl *msg;
3767 struct GNUNET_PeerIdentity id;
3769 if (0 == size && NULL == buf)
3771 // TODO retry? cancel?
3775 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
3776 peer_info = (struct MeshPeerInfo *) cls;
3777 msg = (struct GNUNET_MESH_PeerControl *) buf;
3778 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
3779 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
3780 // msg->tunnel_id = htonl(peer_info->t->tid);
3781 GNUNET_PEER_resolve (peer_info->id, &id);
3782 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
3790 * Send keepalive packets for a tunnel.
3792 * @param cls Closure (tunnel for which to send the keepalive).
3793 * @param tc Notification context.
3796 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3798 struct MeshTunnel *t = cls;
3799 struct GNUNET_MESH_TunnelKeepAlive *msg;
3800 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
3803 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3804 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3805 NULL == t->owner || 0 == t->local_tid || 0 != t->prev_hop)
3810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3811 "sending keepalive for tunnel %d\n", t->id.tid);
3813 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
3814 msg->header.size = htons (size);
3815 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
3816 msg->oid = my_full_id;
3817 msg->tid = htonl (t->id.tid);
3818 send_prebuilt_message (&msg->header, t->next_hop, t);
3820 t->maintenance_task =
3821 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
3826 * Function to process paths received for a new peer addition. The recorded
3827 * paths form the initial tunnel, which can be optimized later.
3828 * Called on each result obtained for the DHT search.
3830 * @param cls closure
3831 * @param exp when will this value expire
3832 * @param key key of the result
3833 * @param get_path path of the get request
3834 * @param get_path_length lenght of get_path
3835 * @param put_path path of the put request
3836 * @param put_path_length length of the put_path
3837 * @param type type of the result
3838 * @param size number of bytes in data
3839 * @param data pointer to the result data
3842 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
3843 const struct GNUNET_HashCode * key,
3844 const struct GNUNET_PeerIdentity *get_path,
3845 unsigned int get_path_length,
3846 const struct GNUNET_PeerIdentity *put_path,
3847 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
3848 size_t size, const void *data)
3850 struct MeshPeerInfo *peer = cls;
3851 struct MeshPeerPath *p;
3852 struct GNUNET_PeerIdentity pi;
3855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
3856 GNUNET_PEER_resolve (peer->id, &pi);
3857 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
3859 p = path_build_from_dht (get_path, get_path_length,
3860 put_path, put_path_length);
3861 path_add_to_peers (p, GNUNET_NO);
3863 for (i = 0; i < peer->ntunnels; i++)
3865 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
3866 peer_connect (peer, peer->tunnels[i]);
3873 /******************************************************************************/
3874 /********************* MESH LOCAL HANDLES **************************/
3875 /******************************************************************************/
3879 * Handler for client disconnection
3881 * @param cls closure
3882 * @param client identification of the client; NULL
3883 * for the last call when the server is destroyed
3886 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
3888 struct MeshClient *c;
3889 struct MeshClient *next;
3891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected\n");
3894 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
3901 if (c->handle != client)
3903 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... searching\n");
3907 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
3909 GNUNET_SERVER_client_drop (c->handle);
3910 c->shutting_down = GNUNET_YES;
3911 GNUNET_CONTAINER_multihashmap_iterate (c->own_tunnels,
3912 &tunnel_destroy_iterator, c);
3913 GNUNET_CONTAINER_multihashmap_iterate (c->incoming_tunnels,
3914 &tunnel_destroy_iterator, c);
3915 GNUNET_CONTAINER_multihashmap_destroy (c->own_tunnels);
3916 GNUNET_CONTAINER_multihashmap_destroy (c->incoming_tunnels);
3918 if (NULL != c->ports)
3919 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
3921 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
3922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
3924 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
3927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
3933 * Handler for new clients
3935 * @param cls closure
3936 * @param client identification of the client
3937 * @param message the actual message, which includes messages the client wants
3940 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
3941 const struct GNUNET_MessageHeader *message)
3943 struct GNUNET_MESH_ClientConnect *cc_msg;
3944 struct MeshClient *c;
3949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected\n");
3951 /* Check data sanity */
3952 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
3953 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
3954 if (0 != (size % sizeof (uint32_t)))
3957 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
3960 size /= sizeof (uint32_t);
3962 /* Create new client structure */
3963 c = GNUNET_malloc (sizeof (struct MeshClient));
3964 c->id = next_client_id++; /* overflow not important: just for debug */
3965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
3966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
3968 GNUNET_SERVER_client_keep (client);
3972 struct GNUNET_HashCode hc;
3974 p = (uint32_t *) &cc_msg[1];
3975 c->ports = GNUNET_CONTAINER_multihashmap_create (size, GNUNET_NO);
3976 for (i = 0; i < size; i++)
3979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
3980 GMC_hash32 (u32, &hc);
3982 /* store in client's hashmap */
3983 GNUNET_CONTAINER_multihashmap_put (c->ports, &hc, c,
3984 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
3985 /* store in global hashmap */
3986 /* FIXME only allow one client to have the port open,
3987 * have a backup hashmap with waiting clients */
3988 GNUNET_CONTAINER_multihashmap_put (ports, &hc, c,
3989 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
3993 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
3994 c->own_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3995 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
3996 GNUNET_SERVER_notification_context_add (nc, client);
3997 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
3999 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
4005 * Handler for requests of new tunnels
4007 * @param cls Closure.
4008 * @param client Identification of the client.
4009 * @param message The actual message.
4012 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
4013 const struct GNUNET_MessageHeader *message)
4015 struct GNUNET_MESH_TunnelMessage *t_msg;
4016 struct MeshPeerInfo *peer_info;
4017 struct MeshTunnel *t;
4018 struct MeshClient *c;
4019 MESH_TunnelNumber tid;
4021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
4023 /* Sanity check for client registration */
4024 if (NULL == (c = client_get (client)))
4027 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4032 /* Message sanity check */
4033 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4036 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4040 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4042 GNUNET_i2s (&t_msg->peer));
4043 /* Sanity check for tunnel numbering */
4044 tid = ntohl (t_msg->tunnel_id);
4045 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4048 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4051 /* Sanity check for duplicate tunnel IDs */
4052 if (NULL != tunnel_get_by_local_id (c, tid))
4055 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4059 while (NULL != tunnel_get_by_pi (myid, next_tid))
4060 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4061 t = tunnel_new (myid, next_tid, c, tid);
4062 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4066 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4069 t->port = ntohl (t_msg->port);
4070 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
4071 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
4073 peer_info = peer_get (&t_msg->peer);
4074 GNUNET_array_append (peer_info->tunnels, peer_info->ntunnels, t);
4075 peer_connect (peer_info, t);
4076 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4082 * Handler for requests of deleting tunnels
4084 * @param cls closure
4085 * @param client identification of the client
4086 * @param message the actual message
4089 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4090 const struct GNUNET_MessageHeader *message)
4092 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4093 struct MeshClient *c;
4094 struct MeshTunnel *t;
4095 MESH_TunnelNumber tid;
4097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4098 "Got a DESTROY TUNNEL from client!\n");
4100 /* Sanity check for client registration */
4101 if (NULL == (c = client_get (client)))
4104 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4109 /* Message sanity check */
4110 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4113 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4117 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4119 /* Retrieve tunnel */
4120 tid = ntohl (tunnel_msg->tunnel_id);
4121 t = tunnel_get_by_local_id(c, tid);
4124 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4126 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4131 tunnel_destroy_empty (t);
4132 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4135 send_client_tunnel_destroy (t);
4136 client_delete_tunnel (c, t);
4138 /* Don't try to ACK the client about the tunnel_destroy multicast packet */
4140 tunnel_send_destroy (t);
4141 peer_remove_tunnel (peer_get_short(t->dest), t);
4142 t->destroy = GNUNET_YES;
4143 /* The tunnel will be destroyed when the last message is transmitted. */
4144 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4150 * Handler for requests of seeting tunnel's buffering policy.
4152 * @param cls Closure (unused).
4153 * @param client Identification of the client.
4154 * @param message The actual message.
4157 handle_local_tunnel_buffer (void *cls, struct GNUNET_SERVER_Client *client,
4158 const struct GNUNET_MessageHeader *message)
4160 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4161 struct MeshClient *c;
4162 struct MeshTunnel *t;
4163 MESH_TunnelNumber tid;
4165 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4166 "Got a BUFFER request from client!\n");
4168 /* Sanity check for client registration */
4169 if (NULL == (c = client_get (client)))
4172 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4177 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4179 /* Retrieve tunnel */
4180 tid = ntohl (tunnel_msg->tunnel_id);
4181 t = tunnel_get_by_local_id(c, tid);
4184 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4186 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4190 switch (ntohs(message->type))
4192 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER:
4193 t->nobuffer = GNUNET_NO;
4195 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER:
4196 t->nobuffer = GNUNET_YES;
4202 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4207 * Handler for client traffic directed to one peer
4209 * @param cls closure
4210 * @param client identification of the client
4211 * @param message the actual message
4214 handle_local_unicast (void *cls, struct GNUNET_SERVER_Client *client,
4215 const struct GNUNET_MessageHeader *message)
4217 struct MeshClient *c;
4218 struct MeshTunnel *t;
4219 struct GNUNET_MESH_Unicast *data_msg;
4220 MESH_TunnelNumber tid;
4223 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4224 "Got a unicast request from a client!\n");
4226 /* Sanity check for client registration */
4227 if (NULL == (c = client_get (client)))
4230 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4235 data_msg = (struct GNUNET_MESH_Unicast *) message;
4237 /* Sanity check for message size */
4238 size = ntohs (message->size);
4239 if (sizeof (struct GNUNET_MESH_Unicast) +
4240 sizeof (struct GNUNET_MessageHeader) > size)
4243 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4247 /* Tunnel exists? */
4248 tid = ntohl (data_msg->tid);
4249 t = tunnel_get_by_local_id (c, tid);
4253 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4257 /* Is it a local tunnel? Then, does client own the tunnel? */
4258 if (t->owner->handle != client)
4261 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4265 /* PID should be as expected: client<->service communication */
4266 if (ntohl (data_msg->pid) != t->prev_fc.last_pid_recv + 1)
4269 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4270 "Unicast PID, expected %u, got %u\n",
4271 t->prev_fc.last_pid_recv + 1, ntohl (data_msg->pid));
4272 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4276 /* Ok, everything is correct, send the message
4277 * (pretend we got it from a mesh peer)
4280 /* Work around const limitation */
4281 char buf[ntohs (message->size)] GNUNET_ALIGN;
4282 struct GNUNET_MESH_Unicast *copy;
4284 copy = (struct GNUNET_MESH_Unicast *) buf;
4285 memcpy (buf, data_msg, size);
4286 copy->oid = my_full_id;
4287 copy->tid = htonl (t->id.tid);
4288 copy->ttl = htonl (default_ttl);
4289 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4290 " calling generic handler...\n");
4291 handle_mesh_unicast (NULL, &my_full_id, ©->header);
4293 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4294 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4301 * Handler for client traffic directed to the origin
4303 * @param cls closure
4304 * @param client identification of the client
4305 * @param message the actual message
4308 handle_local_to_origin (void *cls, struct GNUNET_SERVER_Client *client,
4309 const struct GNUNET_MessageHeader *message)
4311 struct GNUNET_MESH_ToOrigin *data_msg;
4312 struct MeshFlowControl *fc;
4313 struct MeshClient *c;
4314 struct MeshTunnel *t;
4315 MESH_TunnelNumber tid;
4318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4319 "Got a ToOrigin request from a client!\n");
4320 /* Sanity check for client registration */
4321 if (NULL == (c = client_get (client)))
4324 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4329 data_msg = (struct GNUNET_MESH_ToOrigin *) message;
4331 /* Sanity check for message size */
4332 size = ntohs (message->size);
4333 if (sizeof (struct GNUNET_MESH_ToOrigin) +
4334 sizeof (struct GNUNET_MessageHeader) > size)
4337 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4341 /* Tunnel exists? */
4342 tid = ntohl (data_msg->tid);
4343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4344 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4347 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4350 t = tunnel_get_by_local_id (c, tid);
4353 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4354 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4356 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4360 /* It should be sent by someone who has this as incoming tunnel. */
4364 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4368 /* PID should be as expected */
4370 if (ntohl (data_msg->pid) != fc->last_pid_recv + 1)
4373 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4374 "To Origin PID, expected %u, got %u\n",
4375 fc->last_pid_recv + 1,
4376 ntohl (data_msg->pid));
4377 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4381 /* Ok, everything is correct, send the message
4382 * (pretend we got it from a mesh peer)
4385 char buf[ntohs (message->size)] GNUNET_ALIGN;
4386 struct GNUNET_MESH_ToOrigin *copy;
4388 /* Work around 'const' limitation */
4389 memcpy (buf, data_msg, size);
4390 copy = (struct GNUNET_MESH_ToOrigin *) buf;
4391 GNUNET_PEER_resolve (t->id.oid, ©->oid);
4392 copy->tid = htonl (t->id.tid);
4393 copy->ttl = htonl (default_ttl);
4395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4396 " calling generic handler...\n");
4397 handle_mesh_to_orig (NULL, &my_full_id, ©->header);
4399 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4406 * Handler for client's ACKs for payload traffic.
4408 * @param cls Closure (unused).
4409 * @param client Identification of the client.
4410 * @param message The actual message.
4413 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
4414 const struct GNUNET_MessageHeader *message)
4416 struct GNUNET_MESH_LocalAck *msg;
4417 struct MeshTunnel *t;
4418 struct MeshClient *c;
4419 MESH_TunnelNumber tid;
4422 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
4423 /* Sanity check for client registration */
4424 if (NULL == (c = client_get (client)))
4427 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4432 msg = (struct GNUNET_MESH_LocalAck *) message;
4434 /* Tunnel exists? */
4435 tid = ntohl (msg->tunnel_id);
4436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
4437 t = tunnel_get_by_local_id (c, tid);
4441 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
4442 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
4443 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4447 ack = ntohl (msg->max_pid);
4448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ack);
4450 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
4453 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
4454 t->prev_fc.last_ack_recv = ack;
4455 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4459 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
4460 t->next_fc.last_ack_recv = ack;
4461 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
4464 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4472 * Iterator over all tunnels to send a monitoring client info about each tunnel.
4474 * @param cls Closure (client handle).
4475 * @param key Key (hashed tunnel ID, unused).
4476 * @param value Tunnel info.
4478 * @return GNUNET_YES, to keep iterating.
4481 monitor_all_tunnels_iterator (void *cls,
4482 const struct GNUNET_HashCode * key,
4485 struct GNUNET_SERVER_Client *client = cls;
4486 struct MeshTunnel *t = value;
4487 struct GNUNET_MESH_LocalMonitor *msg;
4489 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
4490 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
4491 msg->tunnel_id = htonl (t->id.tid);
4492 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4493 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
4494 GNUNET_PEER_resolve (t->dest, &msg->destination);
4496 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4497 "* sending info about tunnel %s [%u]\n",
4498 GNUNET_i2s (&msg->owner), t->id.tid);
4500 GNUNET_SERVER_notification_context_unicast (nc, client,
4501 &msg->header, GNUNET_NO);
4507 * Handler for client's MONITOR request.
4509 * @param cls Closure (unused).
4510 * @param client Identification of the client.
4511 * @param message The actual message.
4514 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
4515 const struct GNUNET_MessageHeader *message)
4517 struct MeshClient *c;
4519 /* Sanity check for client registration */
4520 if (NULL == (c = client_get (client)))
4523 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4527 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4528 "Received get tunnels request from client %u\n",
4530 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
4531 monitor_all_tunnels_iterator,
4533 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4534 "Get tunnels request from client %u completed\n",
4536 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4541 * Handler for client's MONITOR_TUNNEL request.
4543 * @param cls Closure (unused).
4544 * @param client Identification of the client.
4545 * @param message The actual message.
4548 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
4549 const struct GNUNET_MessageHeader *message)
4551 const struct GNUNET_MESH_LocalMonitor *msg;
4552 struct GNUNET_MESH_LocalMonitor *resp;
4553 struct MeshClient *c;
4554 struct MeshTunnel *t;
4556 /* Sanity check for client registration */
4557 if (NULL == (c = client_get (client)))
4560 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4564 msg = (struct GNUNET_MESH_LocalMonitor *) message;
4565 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4566 "Received tunnel info request from client %u for tunnel %s[%X]\n",
4569 ntohl (msg->tunnel_id));
4570 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
4573 /* We don't know the tunnel FIXME */
4574 struct GNUNET_MESH_LocalMonitor warn;
4577 GNUNET_SERVER_notification_context_unicast (nc, client,
4580 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4584 /* Initialize context */
4585 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
4587 GNUNET_PEER_resolve (t->dest, &resp->destination);
4588 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
4589 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
4590 &resp->header, GNUNET_NO);
4593 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4594 "Monitor tunnel request from client %u completed\n",
4596 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4601 * Functions to handle messages from clients
4603 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
4604 {&handle_local_new_client, NULL,
4605 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
4606 {&handle_local_tunnel_create, NULL,
4607 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
4608 sizeof (struct GNUNET_MESH_TunnelMessage)},
4609 {&handle_local_tunnel_destroy, NULL,
4610 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
4611 sizeof (struct GNUNET_MESH_TunnelMessage)},
4612 {&handle_local_tunnel_buffer, NULL,
4613 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_BUFFER,
4614 sizeof (struct GNUNET_MESH_TunnelMessage)},
4615 {&handle_local_tunnel_buffer, NULL,
4616 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_NOBUFFER,
4617 sizeof (struct GNUNET_MESH_TunnelMessage)},
4618 {&handle_local_unicast, NULL,
4619 GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4620 {&handle_local_to_origin, NULL,
4621 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4622 {&handle_local_ack, NULL,
4623 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
4624 sizeof (struct GNUNET_MESH_LocalAck)},
4625 {&handle_local_get_tunnels, NULL,
4626 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
4627 sizeof (struct GNUNET_MessageHeader)},
4628 {&handle_local_show_tunnel, NULL,
4629 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
4630 sizeof (struct GNUNET_MESH_LocalMonitor)},
4636 * Method called whenever a given peer connects.
4638 * @param cls closure
4639 * @param peer peer identity this notification is about
4642 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
4644 struct MeshPeerInfo *peer_info;
4645 struct MeshPeerPath *path;
4647 DEBUG_CONN ("Peer connected\n");
4648 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
4649 peer_info = peer_get (peer);
4650 if (myid == peer_info->id)
4652 DEBUG_CONN (" (self)\n");
4657 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
4659 path = path_new (2);
4660 path->peers[0] = myid;
4661 path->peers[1] = peer_info->id;
4662 GNUNET_PEER_change_rc (myid, 1);
4663 GNUNET_PEER_change_rc (peer_info->id, 1);
4664 peer_info_add_path (peer_info, path, GNUNET_YES);
4665 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
4671 * Method called whenever a peer disconnects.
4673 * @param cls closure
4674 * @param peer peer identity this notification is about
4677 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
4679 struct MeshPeerInfo *pi;
4680 struct MeshPeerQueue *q;
4681 struct MeshPeerQueue *n;
4683 DEBUG_CONN ("Peer disconnected\n");
4684 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
4694 /* TODO try to reroute this traffic instead */
4695 queue_destroy(q, GNUNET_YES);
4698 if (NULL != pi->core_transmit)
4700 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
4701 pi->core_transmit = NULL;
4703 peer_remove_path (pi, pi->id, myid);
4706 DEBUG_CONN (" (self)\n");
4708 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
4714 * Install server (service) handlers and start listening to clients.
4719 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
4720 GNUNET_SERVER_disconnect_notify (server_handle,
4721 &handle_local_client_disconnect, NULL);
4722 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
4724 clients_head = NULL;
4725 clients_tail = NULL;
4727 GNUNET_SERVER_resume (server_handle);
4732 * To be called on core init/fail.
4734 * @param cls Closure (config)
4735 * @param server handle to the server for this service
4736 * @param identity the public identity of this peer
4739 core_init (void *cls, struct GNUNET_CORE_Handle *server,
4740 const struct GNUNET_PeerIdentity *identity)
4742 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4745 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
4746 GNUNET_break (core_handle == server);
4747 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
4750 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
4751 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4753 GNUNET_i2s (identity));
4754 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4756 GNUNET_i2s (&my_full_id));
4757 GNUNET_CORE_disconnect (core_handle);
4758 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4759 NULL, /* Closure passed to MESH functions */
4760 &core_init, /* Call core_init once connected */
4761 &core_connect, /* Handle connects */
4762 &core_disconnect, /* remove peers on disconnects */
4763 NULL, /* Don't notify about all incoming messages */
4764 GNUNET_NO, /* For header only in notification */
4765 NULL, /* Don't notify about all outbound messages */
4766 GNUNET_NO, /* For header-only out notification */
4767 core_handlers); /* Register these handlers */
4776 /******************************************************************************/
4777 /************************ MAIN FUNCTIONS ****************************/
4778 /******************************************************************************/
4781 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
4783 * @param cls closure
4784 * @param key current key code
4785 * @param value value in the hash map
4786 * @return GNUNET_YES if we should continue to iterate,
4790 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
4792 struct MeshTunnel *t = value;
4799 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
4801 * @param cls closure
4802 * @param key current key code
4803 * @param value value in the hash map
4804 * @return GNUNET_YES if we should continue to iterate,
4808 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
4810 struct MeshPeerInfo *p = value;
4811 struct MeshPeerQueue *q;
4812 struct MeshPeerQueue *n;
4820 queue_destroy(q, GNUNET_YES);
4824 peer_info_destroy (p);
4830 * Task run during shutdown.
4836 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4838 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
4840 if (core_handle != NULL)
4842 GNUNET_CORE_disconnect (core_handle);
4847 GNUNET_CRYPTO_ecc_key_create_stop (keygen);
4850 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
4851 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
4852 if (dht_handle != NULL)
4854 GNUNET_DHT_disconnect (dht_handle);
4859 GNUNET_SERVER_notification_context_destroy (nc);
4862 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
4864 GNUNET_SCHEDULER_cancel (announce_id_task);
4865 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
4867 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
4872 * Callback for hostkey read/generation.
4874 * @param cls Closure (Configuration handle).
4875 * @param pk The ECC private key.
4876 * @param emsg Error message, if any.
4879 key_generation_cb (void *cls,
4880 struct GNUNET_CRYPTO_EccPrivateKey *pk,
4883 const struct GNUNET_CONFIGURATION_Handle *c = cls;
4884 struct MeshPeerInfo *peer;
4885 struct MeshPeerPath *p;
4890 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4891 _("Could not access hostkey: %s. Exiting.\n"),
4893 GNUNET_SCHEDULER_shutdown ();
4896 my_private_key = pk;
4897 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
4898 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
4899 &my_full_id.hashPubKey);
4900 myid = GNUNET_PEER_intern (&my_full_id);
4901 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
4902 "Mesh for peer [%s] starting\n",
4903 GNUNET_i2s(&my_full_id));
4905 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
4906 NULL, /* Closure passed to MESH functions */
4907 &core_init, /* Call core_init once connected */
4908 &core_connect, /* Handle connects */
4909 &core_disconnect, /* remove peers on disconnects */
4910 NULL, /* Don't notify about all incoming messages */
4911 GNUNET_NO, /* For header only in notification */
4912 NULL, /* Don't notify about all outbound messages */
4913 GNUNET_NO, /* For header-only out notification */
4914 core_handlers); /* Register these handlers */
4915 if (core_handle == NULL)
4918 GNUNET_SCHEDULER_shutdown ();
4923 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4925 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
4927 /* Create a peer_info for the local peer */
4928 peer = peer_get (&my_full_id);
4931 GNUNET_PEER_change_rc (myid, 1);
4932 peer_info_add_path (peer, p, GNUNET_YES);
4934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
4939 * Process mesh requests.
4941 * @param cls closure
4942 * @param server the initialized server
4943 * @param c configuration to use
4946 run (void *cls, struct GNUNET_SERVER_Handle *server,
4947 const struct GNUNET_CONFIGURATION_Handle *c)
4951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
4952 server_handle = server;
4953 GNUNET_SERVER_suspend (server_handle);
4956 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
4959 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4961 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4962 "mesh", "peer/privatekey");
4963 GNUNET_SCHEDULER_shutdown ();
4968 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
4969 &refresh_path_time))
4971 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4973 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4974 "mesh", "refresh path time");
4975 GNUNET_SCHEDULER_shutdown ();
4980 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
4983 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4985 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4986 "mesh", "id announce time");
4987 GNUNET_SCHEDULER_shutdown ();
4992 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
4995 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4997 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
4998 "mesh", "connect timeout");
4999 GNUNET_SCHEDULER_shutdown ();
5004 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5007 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5009 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5010 "mesh", "max msgs queue");
5011 GNUNET_SCHEDULER_shutdown ();
5016 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5019 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5021 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5022 "mesh", "max tunnels");
5023 GNUNET_SCHEDULER_shutdown ();
5028 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5031 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5033 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5034 "mesh", "default ttl", 64);
5039 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5042 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5043 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5044 "mesh", "max peers", 1000);
5049 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5050 &dht_replication_level))
5052 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5054 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5055 "mesh", "dht replication level", 3);
5056 dht_replication_level = 3;
5059 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5060 incoming_tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5061 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5062 ports = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5064 dht_handle = GNUNET_DHT_connect (c, 64);
5065 if (NULL == dht_handle)
5069 stats = GNUNET_STATISTICS_create ("mesh", c);
5071 /* Scheduled the task to clean up when shutdown is called */
5072 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5074 keygen = GNUNET_CRYPTO_ecc_key_create_start (keyfile,
5077 GNUNET_free (keyfile);
5082 * The main function for the mesh service.
5084 * @param argc number of arguments from the command line
5085 * @param argv command line arguments
5086 * @return 0 ok, 1 on error
5089 main (int argc, char *const *argv)
5094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5095 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5097 ret = (GNUNET_OK == r) ? 0 : 1;
5098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
5102 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5103 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
5104 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);