2 This file is part of GNUnet.
3 (C) 2001-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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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.
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16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
27 * - when sending in-order buffered data, wait for client ACKs
30 * - relay corking down to core
31 * - set ttl relative to path length
39 #include "mesh_protocol.h"
40 #include "mesh_path.h"
41 #include "block_mesh.h"
42 #include "gnunet_dht_service.h"
43 #include "gnunet_statistics_service.h"
45 #define MESH_BLOOM_SIZE 128
47 #define MESH_DEBUG_DHT GNUNET_NO
48 #define MESH_DEBUG_CONNECTION GNUNET_NO
49 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
51 #define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\
52 GNUNET_TIME_UNIT_MINUTES,\
54 #define MESH_RETRANSMIT_TIME GNUNET_TIME_UNIT_SECONDS
55 #define MESH_RETRANSMIT_MARGIN 4
57 #if MESH_DEBUG_CONNECTION
58 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
60 #define DEBUG_CONN(...)
64 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
66 #define DEBUG_DHT(...)
73 struct timespec __mesh_start;
74 struct timespec __mesh_end;
75 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
76 #define INTERVAL_END \
78 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
79 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
80 if (__diff < 0) __diff += 1000000000;\
84 #define INTERVAL_SHOW \
86 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
88 #define INTERVAL_START
93 /******************************************************************************/
94 /************************ DATA STRUCTURES ****************************/
95 /******************************************************************************/
97 /** FWD declaration */
103 * Struct containing info about a queued transmission to this peer
110 struct MeshPeerQueue *next;
115 struct MeshPeerQueue *prev;
118 * Peer this transmission is directed to.
120 struct MeshPeerInfo *peer;
123 * Tunnel this message belongs to.
125 struct MeshTunnel *tunnel;
128 * Pointer to info stucture used as cls.
138 * Size of the message
145 * Struct containing all information regarding a given peer
155 * Last time we heard from this peer
157 struct GNUNET_TIME_Absolute last_contact;
160 * Number of attempts to reconnect so far
162 int n_reconnect_attempts;
165 * Paths to reach the peer, ordered by ascending hop count
167 struct MeshPeerPath *path_head;
170 * Paths to reach the peer, ordered by ascending hop count
172 struct MeshPeerPath *path_tail;
175 * Handle to stop the DHT search for a path to this peer
177 struct GNUNET_DHT_GetHandle *dhtget;
180 * Array of tunnels this peer is the target of.
181 * Most probably a small amount, therefore not a hashmap.
182 * When the path to the peer changes, notify these tunnels to let them
183 * re-adjust their path trees.
185 struct MeshTunnel **tunnels;
188 * Number of tunnels this peers participates in
190 unsigned int ntunnels;
193 * Transmission queue to core DLL head
195 struct MeshPeerQueue *queue_head;
198 * Transmission queue to core DLL tail
200 struct MeshPeerQueue *queue_tail;
203 * How many messages are in the queue to this peer.
205 unsigned int queue_n;
208 * Handle for queued transmissions
210 struct GNUNET_CORE_TransmitHandle *core_transmit;
215 * Struct to encapsulate all the Flow Control information to a peer in the
216 * context of a tunnel: Same peer in different tunnels will have independent
217 * flow control structures, allowing to choke/free tunnels according to its
220 struct MeshFlowControl
223 * ID of the last packet sent towards the peer.
225 uint32_t last_pid_sent;
228 * ID of the last packet received from the peer.
230 uint32_t last_pid_recv;
233 * Last ACK sent to the peer (peer can't send more than this PID).
235 uint32_t last_ack_sent;
238 * Last ACK sent towards the origin (for traffic towards leaf node).
240 uint32_t last_ack_recv;
243 * How many payload messages are in the queue towards this peer.
248 * Task to poll the peer in case of a lost ACK causes stall.
250 GNUNET_SCHEDULER_TaskIdentifier poll_task;
253 * How frequently to poll for ACKs.
255 struct GNUNET_TIME_Relative poll_time;
258 * On which tunnel to poll.
259 * Using an explicit poll_ctx would not help memory wise,
260 * since the allocated context would have to be stored in the
261 * fc struct in order to free it upon cancelling poll_task.
263 struct MeshTunnel *t;
268 * Globally unique tunnel identification (owner + number)
269 * DO NOT USE OVER THE NETWORK
274 * Node that owns the tunnel
279 * Tunnel number to differentiate all the tunnels owned by the node oid
280 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
282 MESH_TunnelNumber tid;
287 * Data needed for reliable tunnel endpoint retransmission management.
289 struct MeshTunnelReliability;
293 * Info needed to retry a message in case it gets lost.
295 struct MeshReliableMessage
298 * Double linked list, FIFO style
300 struct MeshReliableMessage *next;
301 struct MeshReliableMessage *prev;
304 * Tunnel Reliability queue this message is in.
306 struct MeshTunnelReliability *rel;
309 * ID of the message (ACK needed to free)
314 * When was this message issued (to calculate ACK delay) FIXME update with traffic
316 struct GNUNET_TIME_Absolute timestamp;
318 /* struct GNUNET_MESH_Data with payload */
322 struct MeshTunnelReliability
325 * Tunnel this is about.
327 struct MeshTunnel *t;
330 * DLL of messages sent and not yet ACK'd.
332 struct MeshReliableMessage *head_sent;
333 struct MeshReliableMessage *tail_sent;
346 * DLL of messages received out of order.
348 struct MeshReliableMessage *head_recv;
349 struct MeshReliableMessage *tail_recv;
357 * Task to resend/poll in case no ACK is received.
359 GNUNET_SCHEDULER_TaskIdentifier retry_task;
362 * Counter for exponential backoff.
364 struct GNUNET_TIME_Relative retry_timer;
367 * How long does it usually take to get an ACK. FIXME update with traffic
369 struct GNUNET_TIME_Relative expected_delay;
374 * Struct containing all information regarding a tunnel
375 * For an intermediate node the improtant info used will be:
376 * - id Tunnel unique identification
377 * - paths[0] To know where to send it next
378 * - metainfo: ready, speeds, accounting
385 struct MESH_TunnelID id;
388 * Port of the tunnel.
393 * State of the tunnel.
395 enum MeshTunnelState state;
398 * Local tunnel number ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI or 0 )
400 MESH_TunnelNumber local_tid;
403 * Local tunnel number for local destination clients (incoming number)
404 * ( >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV or 0). All clients share the same
407 MESH_TunnelNumber local_tid_dest;
410 * Is the tunnel bufferless (minimum latency)?
415 * Is the tunnel reliable?
420 * Force sending ACK? Flag to allow duplicate ACK on POLL.
425 * How many messages do we accept in the forward queue.
427 unsigned int queue_max;
430 * Last time the tunnel was used
432 struct GNUNET_TIME_Absolute timestamp;
435 * Destination of the tunnel.
440 * Next hop in the tunnel. If 0, @c client must be set.
442 GNUNET_PEER_Id next_hop;
445 * Previous hop in the tunnel. If 0, @c owner must be set.
447 GNUNET_PEER_Id prev_hop;
450 * Flow control information about @c next_hop or @c client.
452 struct MeshFlowControl next_fc;
455 * Flow control information about @c prev_hop or @c owner.
457 struct MeshFlowControl prev_fc;
460 * Client owner of the tunnel, if any
462 struct MeshClient *owner;
465 * Client destination of the tunnel, if any.
467 struct MeshClient *client;
470 * Task to keep the used paths alive at the owner,
471 * time tunnel out on all the other peers.
473 GNUNET_SCHEDULER_TaskIdentifier maintenance_task;
476 * Path being used for the tunnel.
478 struct MeshPeerPath *path;
481 * Flag to signal the destruction of the tunnel.
482 * If this is set GNUNET_YES the tunnel will be destroyed
483 * when the queue is empty.
488 * Total messages pending for this tunnels, payload or not.
490 unsigned int pending_messages;
494 * Only present (non-NULL) at the owner of a tunnel.
496 struct MeshTunnelReliability *fwd_rel;
500 * Only present (non-NULL) at the destination of a tunnel.
502 struct MeshTunnelReliability *bck_rel;
507 * Struct containing information about a client of the service
509 * TODO: add a list of 'waiting' ports
516 struct MeshClient *next;
521 struct MeshClient *prev;
524 * Tunnels that belong to this client, indexed by local id
526 struct GNUNET_CONTAINER_MultiHashMap32 *own_tunnels;
529 * Tunnels this client has accepted, indexed by incoming local id
531 struct GNUNET_CONTAINER_MultiHashMap32 *incoming_tunnels;
534 * Handle to communicate with the client
536 struct GNUNET_SERVER_Client *handle;
539 * Ports that this client has declared interest in.
540 * Indexed by port, contains *Client.
542 struct GNUNET_CONTAINER_MultiHashMap32 *ports;
545 * Whether the client is active or shutting down (don't send confirmations
546 * to a client that is shutting down.
551 * ID of the client, mainly for debug messages
558 /******************************************************************************/
559 /************************ DEBUG FUNCTIONS ****************************/
560 /******************************************************************************/
564 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
565 * @param cls string to print
566 * @param success GNUNET_OK if the PUT was transmitted,
567 * GNUNET_NO on timeout,
568 * GNUNET_SYSERR on disconnect from service
569 * after the PUT message was transmitted
570 * (so we don't know if it was received or not)
575 mesh_debug (void *cls, int success)
579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
585 /******************************************************************************/
586 /*********************** GLOBAL VARIABLES ****************************/
587 /******************************************************************************/
589 /************************** Configuration parameters **************************/
592 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
594 static struct GNUNET_TIME_Relative refresh_path_time;
597 * How often to PUT own ID in the DHT.
599 static struct GNUNET_TIME_Relative id_announce_time;
602 * Maximum time allowed to connect to a peer found by string.
604 static struct GNUNET_TIME_Relative connect_timeout;
607 * Default TTL for payload packets.
609 static unsigned long long default_ttl;
612 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
614 static unsigned long long dht_replication_level;
617 * How many tunnels are we willing to maintain.
618 * Local tunnels are always allowed, even if there are more tunnels than max.
620 static unsigned long long max_tunnels;
623 * How many messages *in total* are we willing to queue, divided by number of
624 * tunnels to get tunnel queue size.
626 static unsigned long long max_msgs_queue;
629 * How many peers do we want to remember?
631 static unsigned long long max_peers;
634 * Percentage of messages that will be dropped (for test purposes only).
636 static unsigned long long drop_percent;
638 /*************************** Static global variables **************************/
641 * DLL with all the clients, head.
643 static struct MeshClient *clients_head;
646 * DLL with all the clients, tail.
648 static struct MeshClient *clients_tail;
651 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
653 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
656 * Number of tunnels known.
658 static unsigned long long n_tunnels;
661 * Tunnels incoming, indexed by MESH_TunnelNumber
662 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
664 static struct GNUNET_CONTAINER_MultiHashMap32 *incoming_tunnels;
667 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
669 static struct GNUNET_CONTAINER_MultiHashMap *peers;
672 * Handle to communicate with transport
674 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
677 * Handle to communicate with core.
679 static struct GNUNET_CORE_Handle *core_handle;
684 static struct GNUNET_DHT_Handle *dht_handle;
689 static struct GNUNET_SERVER_Handle *server_handle;
692 * Handle to the statistics service.
694 static struct GNUNET_STATISTICS_Handle *stats;
697 * Notification context, to send messages to local clients.
699 static struct GNUNET_SERVER_NotificationContext *nc;
702 * Local peer own ID (memory efficient handle).
704 static GNUNET_PEER_Id myid;
707 * Local peer own ID (full value).
709 static struct GNUNET_PeerIdentity my_full_id;
714 static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
719 static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key;
722 * Tunnel ID for the next created tunnel (global tunnel number).
724 static MESH_TunnelNumber next_tid;
727 * Tunnel ID for the next incoming tunnel (local tunnel number).
729 static MESH_TunnelNumber next_local_tid;
732 * All ports clients of this peer have opened.
734 static struct GNUNET_CONTAINER_MultiHashMap32 *ports;
737 * Task to periodically announce itself in the network.
739 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
742 * Next ID to assign to a client.
744 unsigned int next_client_id;
747 /******************************************************************************/
748 /*********************** DECLARATIONS **************************/
749 /******************************************************************************/
752 * Function to process paths received for a new peer addition. The recorded
753 * paths form the initial tunnel, which can be optimized later.
754 * Called on each result obtained for the DHT search.
757 * @param exp when will this value expire
758 * @param key key of the result
759 * @param type type of the result
760 * @param size number of bytes in data
761 * @param data pointer to the result data
764 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
765 const struct GNUNET_HashCode * key,
766 const struct GNUNET_PeerIdentity *get_path,
767 unsigned int get_path_length,
768 const struct GNUNET_PeerIdentity *put_path,
769 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
770 size_t size, const void *data);
774 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
775 * and insert it in the appropriate structures if the peer is not known yet.
777 * @param peer Full identity of the peer.
779 * @return Existing or newly created peer info.
781 static struct MeshPeerInfo *
782 peer_get (const struct GNUNET_PeerIdentity *peer);
786 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
787 * and insert it in the appropriate structures if the peer is not known yet.
789 * @param peer Short identity of the peer.
791 * @return Existing or newly created peer info.
793 static struct MeshPeerInfo *
794 peer_get_short (const GNUNET_PEER_Id peer);
798 * Build a PeerPath from the paths returned from the DHT, reversing the paths
799 * to obtain a local peer -> destination path and interning the peer ids.
801 * @return Newly allocated and created path
803 static struct MeshPeerPath *
804 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
805 unsigned int get_path_length,
806 const struct GNUNET_PeerIdentity *put_path,
807 unsigned int put_path_length);
811 * Adds a path to the peer_infos of all the peers in the path
813 * @param p Path to process.
814 * @param confirmed Whether we know if the path works or not.
817 path_add_to_peers (struct MeshPeerPath *p, int confirmed);
822 * Search for a tunnel by global ID using full PeerIdentities.
824 * @param oid owner of the tunnel.
825 * @param tid global tunnel number.
827 * @return tunnel handler, NULL if doesn't exist.
829 static struct MeshTunnel *
830 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
834 * Notify a tunnel that a connection has broken that affects at least
837 * @param t Tunnel affected.
838 * @param p1 Peer that got disconnected from p2.
839 * @param p2 Peer that got disconnected from p1.
841 * @return Short ID of the peer disconnected (either p1 or p2).
842 * 0 if the tunnel remained unaffected.
844 static GNUNET_PEER_Id
845 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
850 * @brief Use the given path for the tunnel.
851 * Update the next and prev hops (and RCs).
852 * (Re)start the path refresh in case the tunnel is locally owned.
854 * @param t Tunnel to update.
855 * @param p Path to use.
858 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p);
861 * Tunnel is empty: destroy it.
863 * Notifies all participants (peers, cleints) about the destruction.
865 * @param t Tunnel to destroy.
868 tunnel_destroy_empty (struct MeshTunnel *t);
871 * @brief Queue and pass message to core when possible.
873 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
874 * and accounts for it. In case the queue is full, the message is dropped and
877 * Otherwise, message is treated as internal and allowed to go regardless of
880 * @param cls Closure (@c type dependant). It will be used by queue_send to
881 * build the message to be sent if not already prebuilt.
882 * @param type Type of the message, 0 for a raw message.
883 * @param size Size of the message.
884 * @param dst Neighbor to send message to.
885 * @param t Tunnel this message belongs to.
888 queue_add (void *cls, uint16_t type, size_t size,
889 struct MeshPeerInfo *dst, struct MeshTunnel *t);
893 * Free a transmission that was already queued with all resources
894 * associated to the request.
896 * @param queue Queue handler to cancel.
897 * @param clear_cls Is it necessary to free associated cls?
900 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
904 * @brief Get the next transmittable message from the queue.
906 * This will be the head, except in the case of being a data packet
907 * not allowed by the destination peer.
909 * @param peer Destination peer.
911 * @return The next viable MeshPeerQueue element to send to that peer.
912 * NULL when there are no transmittable messages.
914 struct MeshPeerQueue *
915 queue_get_next (const struct MeshPeerInfo *peer);
919 * Core callback to write a queued packet to core buffer
921 * @param cls Closure (peer info).
922 * @param size Number of bytes available in buf.
923 * @param buf Where the to write the message.
925 * @return number of bytes written to buf
928 queue_send (void *cls, size_t size, void *buf);
931 /******************************************************************************/
932 /************************ PERIODIC FUNCTIONS ****************************/
933 /******************************************************************************/
936 * Periodically announce self id in the DHT
939 * @param tc task context
942 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
946 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
948 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
952 * - Set data expiration in function of X
955 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
957 block.id = my_full_id;
958 GNUNET_DHT_put (dht_handle, /* DHT handle */
959 &my_full_id.hashPubKey, /* Key to use */
960 dht_replication_level, /* Replication level */
961 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
962 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
963 sizeof (block), /* Size of the data */
964 (const char *) &block, /* Data itself */
965 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
966 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
967 NULL, /* Continuation */
968 NULL); /* Continuation closure */
970 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
974 /******************************************************************************/
975 /****************** GENERAL HELPER FUNCTIONS ************************/
976 /******************************************************************************/
980 * Check if client has registered with the service and has not disconnected
982 * @param client the client to check
984 * @return non-NULL if client exists in the global DLL
986 static struct MeshClient *
987 client_get (struct GNUNET_SERVER_Client *client)
989 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
994 * Deletes a tunnel from a client (either owner or destination). To be used on
997 * @param c Client whose tunnel to delete.
998 * @param t Tunnel which should be deleted.
1001 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1005 GNUNET_assert (GNUNET_YES ==
1006 GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels,
1012 GNUNET_assert (GNUNET_YES ==
1013 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
1020 * Notify the appropriate client that a new incoming tunnel was created.
1022 * @param t Tunnel that was created.
1025 send_client_tunnel_create (struct MeshTunnel *t)
1027 struct GNUNET_MESH_TunnelMessage msg;
1029 if (NULL == t->client)
1031 msg.header.size = htons (sizeof (msg));
1032 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1033 msg.tunnel_id = htonl (t->local_tid_dest);
1034 msg.port = htonl (t->port);
1036 msg.opt |= GNUNET_YES == t->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0;
1037 msg.opt |= GNUNET_YES == t->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0;
1038 msg.opt = htonl (msg.opt);
1039 GNUNET_PEER_resolve (t->id.oid, &msg.peer);
1040 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1041 &msg.header, GNUNET_NO);
1046 * Notify dest client that the incoming tunnel is no longer valid.
1048 * @param c Client to notify..
1049 * @param t Tunnel that is destroyed.
1052 send_client_tunnel_destroy (struct MeshClient *c, struct MeshTunnel *t)
1054 struct GNUNET_MESH_TunnelMessage msg;
1061 if (c != t->client && c != t->owner)
1066 msg.header.size = htons (sizeof (msg));
1067 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1068 msg.tunnel_id = htonl (t->local_tid_dest);
1069 msg.port = htonl (0);
1070 memset(&msg.peer, 0, sizeof (msg.peer));
1071 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1072 &msg.header, GNUNET_NO);
1077 * Iterator over all the peers to remove the oldest not-used entry.
1079 * @param cls Closure (unsued).
1080 * @param key ID of the peer.
1081 * @param value Peer_Info of the peer.
1086 peer_info_timeout (void *cls,
1087 const struct GNUNET_HashCode *key,
1094 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1095 * and insert it in the appropriate structures if the peer is not known yet.
1097 * @param peer Full identity of the peer.
1099 * @return Existing or newly created peer info.
1101 static struct MeshPeerInfo *
1102 peer_get (const struct GNUNET_PeerIdentity *peer)
1104 struct MeshPeerInfo *peer_info;
1106 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1107 if (NULL == peer_info)
1110 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1111 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1113 GNUNET_CONTAINER_multihashmap_iterate (peers,
1117 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1118 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1119 peer_info->id = GNUNET_PEER_intern (peer);
1121 peer_info->last_contact = GNUNET_TIME_absolute_get();
1128 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1129 * and insert it in the appropriate structures if the peer is not known yet.
1131 * @param peer Short identity of the peer.
1133 * @return Existing or newly created peer info.
1135 static struct MeshPeerInfo *
1136 peer_get_short (const GNUNET_PEER_Id peer)
1138 struct GNUNET_PeerIdentity id;
1140 GNUNET_PEER_resolve (peer, &id);
1141 return peer_get (&id);
1146 * Select which PID to POLL for, to compensate for lost messages.
1148 * @param pi Peer we want to poll.
1149 * @param t Tunnel about which we want to poll.
1151 * @return PID to use, either last sent or first_in_queue - 1
1154 peer_get_first_payload_pid (struct MeshPeerInfo *pi, struct MeshTunnel *t)
1156 struct MeshPeerQueue *q;
1159 type = pi->id == t->next_hop ? GNUNET_MESSAGE_TYPE_MESH_UNICAST :
1160 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN;
1162 for (q = pi->queue_head; NULL != q; q = q->next)
1164 if (q->type == type && q->tunnel == t)
1166 struct GNUNET_MESH_Data *msg = q->cls;
1168 /* Pretend that the last one sent was the previous to this */
1169 return ntohl (msg->pid) - 1;
1173 /* No data in queue, use last sent */
1175 struct MeshFlowControl *fc;
1177 fc = pi->id == t->next_hop ? &t->next_fc : &t->prev_fc;
1178 return fc->last_pid_sent;
1184 * Choose the best path towards a peer considering the tunnel properties.
1186 * @param peer The destination peer.
1187 * @param t The tunnel the path is for.
1189 * @return Best current known path towards the peer, if any.
1191 static struct MeshPeerPath *
1192 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1194 struct MeshPeerPath *best_p;
1195 struct MeshPeerPath *p;
1196 unsigned int best_cost;
1199 best_p = p = peer->path_head;
1200 best_cost = cost = p->length;
1203 if ((cost = p->length) < best_cost)
1214 * Core callback to write a pre-constructed data packet to core buffer
1216 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1217 * @param size Number of bytes available in buf.
1218 * @param buf Where the to write the message.
1220 * @return number of bytes written to buf
1223 send_core_data_raw (void *cls, size_t size, void *buf)
1225 struct GNUNET_MessageHeader *msg = cls;
1228 GNUNET_assert (NULL != msg);
1229 total_size = ntohs (msg->size);
1231 if (total_size > size)
1236 memcpy (buf, msg, total_size);
1243 * Sends an already built message to a peer, properly registrating
1244 * all used resources.
1246 * @param message Message to send. Function makes a copy of it.
1247 * @param peer Short ID of the neighbor whom to send the message.
1248 * @param t Tunnel on which this message is transmitted.
1251 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1252 GNUNET_PEER_Id peer,
1253 struct MeshTunnel *t)
1255 struct GNUNET_PeerIdentity id;
1256 struct MeshPeerInfo *neighbor;
1257 struct MeshPeerPath *p;
1262 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1267 size = ntohs (message->size);
1268 data = GNUNET_malloc (size);
1269 memcpy (data, message, size);
1270 type = ntohs(message->type);
1271 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
1272 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
1274 struct GNUNET_MESH_Data *u;
1276 u = (struct GNUNET_MESH_Data *) data;
1277 u->ttl = htonl (ntohl (u->ttl) - 1);
1279 GNUNET_PEER_resolve (peer, &id);
1280 neighbor = peer_get (&id);
1281 for (p = neighbor->path_head; NULL != p; p = p->next)
1291 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1292 " %s IS NOT DIRECTLY CONNECTED\n",
1294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1297 for (p = neighbor->path_head; NULL != p; p = p->next)
1299 struct GNUNET_PeerIdentity debug_id;
1302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1303 " path with %u hops through:\n",
1305 for (i = 0; i < p->length; i++)
1307 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1310 i, GNUNET_i2s(&debug_id));
1314 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
1315 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1316 " no direct connection to %s\n",
1321 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1332 * Sends a CREATE PATH message for a path to a peer, properly registrating
1333 * all used resources.
1335 * @param t Tunnel for which the path is created.
1338 send_create_path (struct MeshTunnel *t)
1340 struct MeshPeerInfo *neighbor;
1342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send create path\n");
1343 neighbor = peer_get_short (t->next_hop);
1345 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1346 sizeof (struct GNUNET_MESH_CreateTunnel) +
1347 (t->path->length * sizeof (struct GNUNET_PeerIdentity)),
1350 t->state = MESH_TUNNEL_WAITING;
1355 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1357 * @param t Tunnel which to confirm.
1360 send_path_ack (struct MeshTunnel *t)
1362 struct MeshPeerInfo *peer;
1364 peer = peer_get_short (t->prev_hop);
1367 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1368 sizeof (struct GNUNET_MESH_PathACK),
1375 * Try to establish a new connection to this peer in the given tunnel.
1376 * If the peer doesn't have any path to it yet, try to get one.
1377 * If the peer already has some path, send a CREATE PATH towards it.
1379 * @param peer PeerInfo of the peer.
1380 * @param t Tunnel for which to create the path, if possible.
1383 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1385 struct MeshPeerPath *p;
1387 if (NULL != peer->path_head)
1389 p = peer_get_best_path (peer, t);
1390 tunnel_use_path (t, p);
1391 send_create_path (t);
1393 else if (NULL == peer->dhtget)
1395 struct GNUNET_PeerIdentity id;
1397 GNUNET_PEER_resolve (peer->id, &id);
1398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1399 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1400 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1401 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1402 &id.hashPubKey, /* key to search */
1403 dht_replication_level, /* replication level */
1404 GNUNET_DHT_RO_RECORD_ROUTE |
1405 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1407 0, /* xquery bits */
1408 &dht_get_id_handler, peer);
1409 t->state = MESH_TUNNEL_SEARCHING;
1413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1414 "There is no path but the DHT GET is already started.\n");
1420 * Destroy the peer_info and free any allocated resources linked to it
1422 * @param pi The peer_info to destroy.
1424 * @return GNUNET_OK on success
1427 peer_info_destroy (struct MeshPeerInfo *pi)
1429 struct GNUNET_PeerIdentity id;
1430 struct MeshPeerPath *p;
1431 struct MeshPeerPath *nextp;
1434 GNUNET_PEER_resolve (pi->id, &id);
1435 GNUNET_PEER_change_rc (pi->id, -1);
1438 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1441 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1442 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1444 if (NULL != pi->dhtget)
1446 GNUNET_DHT_get_stop (pi->dhtget);
1452 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1456 for (i = 0; i < pi->ntunnels; i++)
1457 tunnel_destroy_empty (pi->tunnels[i]);
1458 GNUNET_array_grow (pi->tunnels, pi->ntunnels, 0);
1465 * Remove all paths that rely on a direct connection between p1 and p2
1466 * from the peer itself and notify all tunnels about it.
1468 * @param peer PeerInfo of affected peer.
1469 * @param p1 GNUNET_PEER_Id of one peer.
1470 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1473 * TODO: optimize (see below)
1476 peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1479 struct MeshPeerPath *p;
1480 struct MeshPeerPath *next;
1481 struct MeshPeerInfo *peer_d;
1483 unsigned int destroyed;
1486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1488 for (p = peer->path_head; NULL != p; p = next)
1491 for (i = 0; i < (p->length - 1); i++)
1493 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1494 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1496 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1506 for (i = 0; i < peer->ntunnels; i++)
1508 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1512 peer_d = peer_get_short (d);
1513 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1514 tunnel_use_path (peer->tunnels[i], next);
1515 peer_connect (peer_d, peer->tunnels[i]);
1517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1522 * Add the path to the peer and update the path used to reach it in case this
1525 * @param peer_info Destination peer to add the path to.
1526 * @param path New path to add. Last peer must be the peer in arg 1.
1527 * Path will be either used of freed if already known.
1528 * @param trusted Do we trust that this path is real?
1531 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1534 struct MeshPeerPath *aux;
1538 if ((NULL == peer_info) || (NULL == path))
1541 path_destroy (path);
1544 if (path->peers[path->length - 1] != peer_info->id)
1547 path_destroy (path);
1550 if (2 >= path->length && GNUNET_NO == trusted)
1552 /* Only allow CORE to tell us about direct paths */
1553 path_destroy (path);
1556 for (l = 1; l < path->length; l++)
1558 if (path->peers[l] == myid)
1560 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1561 for (l2 = 0; l2 < path->length - l; l2++)
1563 path->peers[l2] = path->peers[l + l2];
1568 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1573 struct GNUNET_PeerIdentity id;
1575 GNUNET_PEER_resolve (peer_info->id, &id);
1576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1577 path->length, GNUNET_i2s (&id));
1580 l = path_get_length (path);
1583 path_destroy (path);
1587 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1588 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1590 l2 = path_get_length (aux);
1593 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1594 peer_info->path_tail, aux, path);
1599 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1601 path_destroy (path);
1606 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1613 * Add the path to the origin peer and update the path used to reach it in case
1614 * this is the shortest.
1615 * The path is given in peer_info -> destination, therefore we turn the path
1616 * upside down first.
1618 * @param peer_info Peer to add the path to, being the origin of the path.
1619 * @param path New path to add after being inversed.
1620 * Path will be either used or freed.
1621 * @param trusted Do we trust that this path is real?
1624 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1625 struct MeshPeerPath *path, int trusted)
1628 peer_info_add_path (peer_info, path, trusted);
1633 * Add a tunnel to the list of tunnels a peer participates in.
1634 * Update the tunnel's destination.
1636 * @param p Peer to add to.
1637 * @param t Tunnel to add.
1640 peer_info_add_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1644 GNUNET_break (t->dest == p->id);
1648 GNUNET_PEER_change_rc (t->dest, 1);
1649 GNUNET_array_append (p->tunnels, p->ntunnels, t);
1654 * Remove a tunnel from the list of tunnels a peer participates in.
1655 * Free the tunnel's destination.
1657 * @param p Peer to clean.
1658 * @param t Tunnel to remove.
1661 peer_info_remove_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1665 if (t->dest == p->id)
1667 GNUNET_PEER_change_rc (t->dest, -1);
1670 for (i = 0; i < p->ntunnels; i++)
1672 if (p->tunnels[i] == t)
1674 p->tunnels[i] = p->tunnels[p->ntunnels - 1];
1675 GNUNET_array_grow (p->tunnels, p->ntunnels, p->ntunnels - 1);
1683 * Function called if the connection to the peer has been stalled for a while,
1684 * possibly due to a missed ACK. Poll the peer about its ACK status.
1686 * @param cls Closure (poll ctx).
1687 * @param tc TaskContext.
1690 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1692 struct MeshFlowControl *fc = cls;
1693 struct GNUNET_MESH_Poll msg;
1694 struct MeshTunnel *t = fc->t;
1695 GNUNET_PEER_Id peer;
1697 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1698 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n");
1705 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1707 if (fc == &t->prev_fc)
1709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** prev peer!\n");
1712 else if (fc == &t->next_fc)
1714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** next peer!\n");
1722 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
1723 msg.header.size = htons (sizeof (msg));
1724 msg.tid = htonl (t->id.tid);
1725 msg.pid = htonl (peer_get_first_payload_pid (peer_get_short (peer), t));
1726 send_prebuilt_message (&msg.header, peer, t);
1727 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
1728 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
1734 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1735 * to obtain a local peer -> destination path and interning the peer ids.
1737 * @return Newly allocated and created path
1739 static struct MeshPeerPath *
1740 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1741 unsigned int get_path_length,
1742 const struct GNUNET_PeerIdentity *put_path,
1743 unsigned int put_path_length)
1745 struct MeshPeerPath *p;
1751 GNUNET_PEER_change_rc (myid, 1);
1752 i = get_path_length;
1753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1754 for (i--; i >= 0; i--)
1756 id = GNUNET_PEER_intern (&get_path[i]);
1757 if (p->length > 0 && id == p->peers[p->length - 1])
1759 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1760 GNUNET_PEER_change_rc (id, -1);
1764 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1765 GNUNET_i2s (&get_path[i]));
1767 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1768 p->peers[p->length - 1] = id;
1771 i = put_path_length;
1772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1773 for (i--; i >= 0; i--)
1775 id = GNUNET_PEER_intern (&put_path[i]);
1778 /* PUT path went through us, so discard the path up until now and start
1779 * from here to get a much shorter (and loop-free) path.
1784 if (p->length > 0 && id == p->peers[p->length - 1])
1786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1787 GNUNET_PEER_change_rc (id, -1);
1791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1792 GNUNET_i2s (&put_path[i]));
1794 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1795 p->peers[p->length - 1] = id;
1799 if (get_path_length > 0)
1800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1801 GNUNET_i2s (&get_path[0]));
1802 if (put_path_length > 0)
1803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1804 GNUNET_i2s (&put_path[0]));
1805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1807 for (i = 0; i < p->length; i++)
1809 struct GNUNET_PeerIdentity peer_id;
1811 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1813 GNUNET_i2s (&peer_id));
1821 * Adds a path to the peer_infos of all the peers in the path
1823 * @param p Path to process.
1824 * @param confirmed Whether we know if the path works or not.
1827 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1831 /* TODO: invert and add */
1832 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1833 for (i++; i < p->length; i++)
1835 struct MeshPeerInfo *aux;
1836 struct MeshPeerPath *copy;
1838 aux = peer_get_short (p->peers[i]);
1839 copy = path_duplicate (p);
1840 copy->length = i + 1;
1841 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
1847 * Send keepalive packets for a peer
1849 * @param cls Closure (tunnel for which to send the keepalive).
1850 * @param tc Notification context.
1853 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1857 * Search for a tunnel among the incoming tunnels
1859 * @param tid the local id of the tunnel
1861 * @return tunnel handler, NULL if doesn't exist
1863 static struct MeshTunnel *
1864 tunnel_get_incoming (MESH_TunnelNumber tid)
1866 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1867 return GNUNET_CONTAINER_multihashmap32_get (incoming_tunnels, tid);
1872 * Search for a tunnel among the tunnels for a client
1874 * @param c the client whose tunnels to search in
1875 * @param tid the local id of the tunnel
1877 * @return tunnel handler, NULL if doesn't exist
1879 static struct MeshTunnel *
1880 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1882 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1884 return tunnel_get_incoming (tid);
1888 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI);
1889 return GNUNET_CONTAINER_multihashmap32_get (c->own_tunnels, tid);
1895 * Search for a tunnel by global ID using PEER_ID
1897 * @param pi owner of the tunnel
1898 * @param tid global tunnel number
1900 * @return tunnel handler, NULL if doesn't exist
1902 static struct MeshTunnel *
1903 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1905 struct MESH_TunnelID id;
1906 struct GNUNET_HashCode hash;
1911 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1912 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1917 * Search for a tunnel by global ID using full PeerIdentities
1919 * @param oid owner of the tunnel
1920 * @param tid global tunnel number
1922 * @return tunnel handler, NULL if doesn't exist
1924 static struct MeshTunnel *
1925 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1927 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1932 * Add a client to a tunnel, initializing all needed data structures.
1934 * @param t Tunnel to which add the client.
1935 * @param c Client which to add to the tunnel.
1938 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
1940 if (NULL != t->client)
1946 GNUNET_CONTAINER_multihashmap32_put (c->incoming_tunnels,
1947 t->local_tid_dest, t,
1948 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1954 GNUNET_CONTAINER_multihashmap32_put (incoming_tunnels,
1955 t->local_tid_dest, t,
1956 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1966 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1968 unsigned int own_pos;
1970 for (own_pos = 0; own_pos < p->length; own_pos++)
1972 if (p->peers[own_pos] == myid)
1975 if (own_pos > p->length - 1)
1981 if (own_pos < p->length - 1)
1982 t->next_hop = p->peers[own_pos + 1];
1984 t->next_hop = p->peers[own_pos];
1985 GNUNET_PEER_change_rc (t->next_hop, 1);
1987 t->prev_hop = p->peers[own_pos - 1];
1989 t->prev_hop = p->peers[0];
1990 GNUNET_PEER_change_rc (t->prev_hop, 1);
1992 if (NULL != t->path)
1993 path_destroy (t->path);
1994 t->path = path_duplicate (p);
1997 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
1998 GNUNET_SCHEDULER_cancel (t->maintenance_task);
1999 t->maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
2006 * Notifies a tunnel that a connection has broken that affects at least
2007 * some of its peers. Sends a notification towards the root of the tree.
2008 * In case the peer is the owner of the tree, notifies the client that owns
2009 * the tunnel and tries to reconnect.
2011 * @param t Tunnel affected.
2012 * @param p1 Peer that got disconnected from p2.
2013 * @param p2 Peer that got disconnected from p1.
2015 * @return Short ID of the peer disconnected (either p1 or p2).
2016 * 0 if the tunnel remained unaffected.
2018 static GNUNET_PEER_Id
2019 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2022 // if (myid != p1 && myid != p2) FIXME
2027 // if (tree_get_predecessor (t->tree) != 0)
2029 // /* We are the peer still connected, notify owner of the disconnection. */
2030 // struct GNUNET_MESH_PathBroken msg;
2031 // struct GNUNET_PeerIdentity neighbor;
2033 // msg.header.size = htons (sizeof (msg));
2034 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2035 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2036 // msg.tid = htonl (t->id.tid);
2037 // msg.peer1 = my_full_id;
2038 // GNUNET_PEER_resolve (pid, &msg.peer2);
2039 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2040 // send_prebuilt_message (&msg.header, &neighbor, t);
2047 * Build a local ACK message and send it to a local client.
2049 * @param t Tunnel on which to send the ACK.
2050 * @param c Client to whom send the ACK.
2051 * @param is_fwd Set to GNUNET_YES for FWD ACK (dest->owner)
2054 send_local_ack (struct MeshTunnel *t,
2055 struct MeshClient *c,
2058 struct GNUNET_MESH_LocalAck msg;
2060 msg.header.size = htons (sizeof (msg));
2061 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
2062 msg.tunnel_id = htonl (is_fwd ? t->local_tid : t->local_tid_dest);
2063 GNUNET_SERVER_notification_context_unicast (nc,
2070 * Build an ACK message and queue it to send to the given peer.
2072 * @param t Tunnel on which to send the ACK.
2073 * @param peer Peer to whom send the ACK.
2074 * @param ack Value of the ACK.
2077 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
2079 struct GNUNET_MESH_ACK msg;
2081 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2082 msg.header.size = htons (sizeof (msg));
2083 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
2084 msg.pid = htonl (ack);
2085 msg.tid = htonl (t->id.tid);
2087 send_prebuilt_message (&msg.header, peer, t);
2092 * Send an end-to-end FWD ACK message for the most recent in-sequence payload.
2094 * @param t Tunnel this is about.
2095 * @param fwd Is for FWD traffic? (ACK dest->owner)
2098 tunnel_send_data_ack (struct MeshTunnel *t, int fwd)
2100 struct GNUNET_MESH_DataACK msg;
2101 struct MeshTunnelReliability *rel;
2102 struct MeshReliableMessage *copy;
2107 rel = fwd ? t->bck_rel : t->fwd_rel;
2108 hop = fwd ? t->prev_hop : t->next_hop;
2109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2110 "send_data_ack for %u\n",
2113 if (GNUNET_NO == t->reliable)
2115 GNUNET_break_op (0);
2118 msg.header.type = htons (fwd ? GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK :
2119 GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK);
2120 msg.header.size = htons (sizeof (msg));
2121 msg.tid = htonl (t->id.tid);
2122 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2123 msg.mid = htonl (rel->mid_recv - 1);
2125 for (copy = rel->head_recv; NULL != copy; copy = copy->next)
2127 delta = copy->mid - rel->mid_recv;
2130 mask = 0x1LL << delta;
2131 msg.futures |= mask;
2132 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2133 " setting bit for %u (delta %u) (%llX) -> %llX\n",
2134 copy->mid, delta, mask, msg.futures);
2136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " final futures %llX\n", msg.futures);
2138 send_prebuilt_message (&msg.header, hop, t);
2139 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_data_ack END\n");
2144 * Send an ACK informing the predecessor about the available buffer space.
2145 * In case there is no predecessor, inform the owning client.
2146 * If buffering is off, send only on behalf of children or self if endpoint.
2147 * If buffering is on, send when sent to children and buffer space is free.
2148 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
2149 * the ACK itself goes "back" (towards root).
2151 * @param t Tunnel on which to send the ACK.
2152 * @param type Type of message that triggered the ACK transmission.
2153 * @param fwd Is this FWD ACK? (Going dest->owner)
2156 tunnel_send_ack (struct MeshTunnel *t, uint16_t type, int fwd)
2158 struct MeshTunnelReliability *rel;
2159 struct MeshFlowControl *next_fc;
2160 struct MeshFlowControl *prev_fc;
2161 struct MeshClient *c;
2162 struct MeshClient *o;
2168 rel = fwd ? t->fwd_rel : t->bck_rel;
2169 c = fwd ? t->client : t->owner;
2170 o = fwd ? t->owner : t->client;
2171 next_fc = fwd ? &t->next_fc : &t->prev_fc;
2172 prev_fc = fwd ? &t->prev_fc : &t->next_fc;
2173 hop = fwd ? t->prev_hop : t->next_hop;
2175 /* Is it after unicast retransmission? */
2178 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2179 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2180 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2181 "ACK due to DATA retransmission\n");
2182 if (GNUNET_YES == t->nobuffer)
2184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
2187 if (GNUNET_YES == t->reliable && NULL != c)
2188 tunnel_send_data_ack (t, fwd);
2190 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2191 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2192 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
2194 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2195 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2196 t->force_ack = GNUNET_YES;
2202 /* Check if we need to transmit the ACK */
2204 if (0 && NULL == o &&
2205 t->queue_max > next_fc->queue_n * 4 &&
2206 GMC_is_pid_bigger (prev_fc->last_ack_sent, prev_fc->last_pid_recv) &&
2207 GNUNET_NO == t->force_ack)
2209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
2210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2211 " t->qmax: %u, t->qn: %u\n",
2212 t->queue_max, next_fc->queue_n);
2213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2214 " t->pid: %u, t->ack: %u\n",
2215 prev_fc->last_pid_recv, prev_fc->last_ack_sent);
2219 /* Ok, ACK might be necessary, what PID to ACK? */
2220 delta = t->queue_max - next_fc->queue_n;
2221 if (NULL != o && GNUNET_YES == t->reliable && NULL != rel->head_sent)
2222 delta_mid = rel->mid_sent - rel->head_sent->mid;
2225 if (0 > delta || (GNUNET_YES == t->reliable &&
2227 (rel->n_sent > 10 || delta_mid > 64)))
2229 if (NULL != o && delta > 1)
2231 ack = prev_fc->last_pid_recv + delta;
2232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
2233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2234 " last pid %u, last ack %u, qmax %u, q %u\n",
2235 prev_fc->last_pid_recv, prev_fc->last_ack_sent,
2236 t->queue_max, next_fc->queue_n);
2237 if (ack == prev_fc->last_ack_sent && GNUNET_NO == t->force_ack)
2239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
2243 prev_fc->last_ack_sent = ack;
2245 send_local_ack (t, o, fwd);
2247 send_ack (t, hop, ack);
2250 t->force_ack = GNUNET_NO;
2255 * Modify the mesh message TID from global to local and send to client.
2257 * @param t Tunnel on which to send the message.
2258 * @param msg Message to modify and send.
2259 * @param c Client to send to.
2260 * @param tid Tunnel ID to use (c can be both owner and client).
2263 tunnel_send_client_to_tid (struct MeshTunnel *t,
2264 const struct GNUNET_MESH_Data *msg,
2265 struct MeshClient *c, MESH_TunnelNumber tid)
2267 struct GNUNET_MESH_LocalData *copy;
2268 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
2269 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
2271 if (size < sizeof (struct GNUNET_MessageHeader))
2273 GNUNET_break_op (0);
2281 copy = (struct GNUNET_MESH_LocalData *) cbuf;
2282 memcpy (©[1], &msg[1], size);
2283 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
2284 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
2285 copy->tid = htonl (tid);
2286 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2287 ©->header, GNUNET_NO);
2291 * Modify the unicast message TID from global to local and send to client.
2293 * @param t Tunnel on which to send the message.
2294 * @param msg Message to modify and send.
2295 * @param fwd Forward?
2298 tunnel_send_client_data (struct MeshTunnel *t,
2299 const struct GNUNET_MESH_Data *msg,
2303 tunnel_send_client_to_tid (t, msg, t->client, t->local_tid_dest);
2305 tunnel_send_client_to_tid (t, msg, t->owner, t->local_tid);
2310 * Send up to 64 buffered messages to the client for in order delivery.
2312 * @param t Tunnel on which to empty the message buffer.
2313 * @param c Client to send to.
2314 * @param rel Reliability structure to corresponding peer.
2315 * If rel == t->bck_rel, this is FWD data.
2318 tunnel_send_client_buffered_data (struct MeshTunnel *t, struct MeshClient *c,
2319 struct MeshTunnelReliability *rel)
2322 struct MeshReliableMessage *copy;
2323 struct MeshReliableMessage *next;
2325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n");
2326 for (copy = rel->head_recv; NULL != copy; copy = next)
2329 if (copy->mid == rel->mid_recv)
2331 struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
2333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2334 " have %u! now expecting %u\n",
2335 copy->mid, rel->mid_recv + 1);
2336 tunnel_send_client_data (t, msg, (rel == t->bck_rel));
2338 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2343 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2344 " don't have %u, next is %u\n",
2350 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n");
2355 * We have received a message out of order, buffer it until we receive
2356 * the missing one and we can feed the rest to the client.
2358 * @param t Tunnel to add to.
2359 * @param msg Message to buffer.
2360 * @param rel Reliability data to the corresponding direction.
2363 tunnel_add_buffered_data (struct MeshTunnel *t,
2364 const struct GNUNET_MESH_Data *msg,
2365 struct MeshTunnelReliability *rel)
2367 struct MeshReliableMessage *copy;
2368 struct MeshReliableMessage *prev;
2372 size = ntohs (msg->header.size);
2373 mid = ntohl (msg->mid);
2374 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data %u\n", mid);
2376 copy = GNUNET_malloc (sizeof (*copy) + size);
2379 memcpy (©[1], msg, size);
2381 // FIXME do something better than O(n), although n < 64...
2382 // FIXME start from the end (most messages are the latest ones)
2383 for (prev = rel->head_recv; NULL != prev; prev = prev->next)
2385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %u\n", prev->mid);
2386 if (GMC_is_pid_bigger (prev->mid, mid))
2388 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n");
2389 GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv,
2394 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n");
2395 GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy);
2396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data END\n");
2401 * Destroy a reliable message after it has been acknowledged, either by
2402 * direct mid ACK or bitfield. Updates the appropriate data structures and
2403 * timers and frees all memory.
2405 * @param copy Message that is no longer needed: remote peer got it.
2408 tunnel_free_reliable_message (struct MeshReliableMessage *copy)
2410 struct MeshTunnelReliability *rel;
2411 struct GNUNET_TIME_Relative time;
2414 time = GNUNET_TIME_absolute_get_duration (copy->timestamp);
2415 rel->expected_delay.rel_value *= 7;
2416 rel->expected_delay.rel_value += time.rel_value;
2417 rel->expected_delay.rel_value /= 8;
2419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %u\n", copy->mid);
2420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
2421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! took %s\n",
2422 GNUNET_STRINGS_relative_time_to_string (time, GNUNET_NO));
2423 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n",
2424 GNUNET_STRINGS_relative_time_to_string (rel->expected_delay,
2426 rel->retry_timer = rel->expected_delay;
2427 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2433 * Mark future messages as ACK'd.
2435 * @param t Tunnel whose sent buffer to clean.
2436 * @param msg DataACK message with a bitfield of future ACK'd messages.
2437 * @param rel Reliability data.
2440 tunnel_free_sent_reliable (struct MeshTunnel *t,
2441 const struct GNUNET_MESH_DataACK *msg,
2442 struct MeshTunnelReliability *rel)
2444 struct MeshReliableMessage *copy;
2445 struct MeshReliableMessage *next;
2452 bitfield = msg->futures;
2453 mid = ntohl (msg->mid);
2454 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2455 "free_sent_reliable %u %llX\n",
2457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2458 " rel %p, head %p\n",
2459 rel, rel->head_sent);
2460 for (i = 0, copy = rel->head_sent;
2461 i < 64 && NULL != copy && 0 != bitfield;
2464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2465 " trying bit %u (mid %u)\n",
2468 if (0 == (bitfield & mask))
2471 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n");
2472 /* Bit was set, clear the bit from the bitfield */
2475 /* The i-th bit was set. Do we have that copy? */
2476 /* Skip copies with mid < target */
2477 target = mid + i + 1;
2478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %u\n", target);
2479 while (NULL != copy && GMC_is_pid_bigger (target, copy->mid))
2482 /* Did we run out of copies? (previously freed, it's ok) */
2485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n");
2489 /* Did we overshoot the target? (previously freed, it's ok) */
2490 if (GMC_is_pid_bigger (copy->mid, target))
2492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %u\n", copy->mid);
2496 /* Now copy->mid == target, free it */
2498 tunnel_free_reliable_message (copy);
2501 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n");
2506 * We haven't received an ACK after a certain time: restransmit the message.
2508 * @param cls Closure (MeshReliableMessage with the message to restransmit)
2509 * @param tc TaskContext.
2512 tunnel_retransmit_message (void *cls,
2513 const struct GNUNET_SCHEDULER_TaskContext *tc)
2515 struct MeshTunnelReliability *rel = cls;
2516 struct MeshReliableMessage *copy;
2517 struct MeshFlowControl *fc;
2518 struct MeshPeerQueue *q;
2519 struct MeshPeerInfo *pi;
2520 struct MeshTunnel *t;
2521 struct GNUNET_MESH_Data *payload;
2524 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
2525 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2529 copy = rel->head_sent;
2536 /* Search the message to be retransmitted in the outgoing queue */
2537 payload = (struct GNUNET_MESH_Data *) ©[1];
2538 hop = rel == t->fwd_rel ? t->next_hop : t->prev_hop;
2539 fc = rel == t->fwd_rel ? &t->prev_fc : &t->next_fc;
2540 pi = peer_get_short (hop);
2541 for (q = pi->queue_head; NULL != q; q = q->next)
2543 if (ntohs (payload->header.type) == q->type)
2545 struct GNUNET_MESH_Data *queued_data = q->cls;
2547 if (queued_data->mid == payload->mid)
2552 /* Message not found in the queue */
2555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid);
2557 fc->last_ack_sent++;
2558 fc->last_pid_recv++;
2559 payload->pid = htonl (fc->last_pid_recv);
2560 send_prebuilt_message (&payload->header, hop, t);
2561 GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
2565 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! STILL IN QUEUE %u\n", copy->mid);
2568 rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer);
2569 rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
2570 &tunnel_retransmit_message,
2576 * @brief Re-initiate traffic to this peer if necessary.
2578 * Check if there is traffic queued towards this peer
2579 * and the core transmit handle is NULL (traffic was stalled).
2580 * If so, call core tmt rdy.
2582 * @param peer_id Short ID of peer to which initiate traffic.
2585 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2587 struct MeshPeerInfo *peer;
2588 struct GNUNET_PeerIdentity id;
2589 struct MeshPeerQueue *q;
2592 peer = peer_get_short (peer_id);
2593 if (NULL != peer->core_transmit)
2596 q = queue_get_next (peer);
2599 /* Might br multicast traffic already sent to this particular peer but
2600 * not to other children in this tunnel.
2601 * This way t->queue_n would be > 0 but the queue of this particular peer
2607 GNUNET_PEER_resolve (peer->id, &id);
2608 peer->core_transmit =
2609 GNUNET_CORE_notify_transmit_ready(core_handle,
2612 GNUNET_TIME_UNIT_FOREVER_REL,
2622 * Send a message to all peers and clients in this tunnel that the tunnel
2623 * is no longer valid. If some peer or client should not receive the message,
2624 * should be zero'ed out before calling this function.
2626 * @param t The tunnel whose peers and clients to notify.
2629 tunnel_send_destroy (struct MeshTunnel *t)
2631 struct GNUNET_MESH_TunnelDestroy msg;
2632 struct GNUNET_PeerIdentity id;
2634 msg.header.size = htons (sizeof (msg));
2635 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2636 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2637 msg.tid = htonl (t->id.tid);
2638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2639 " sending tunnel destroy for tunnel: %s [%X]\n",
2640 GNUNET_i2s (&msg.oid), t->id.tid);
2642 if (NULL == t->client && 0 != t->next_hop)
2644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2645 GNUNET_PEER_resolve (t->next_hop, &id);
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2647 " sending forward to %s\n",
2649 send_prebuilt_message (&msg.header, t->next_hop, t);
2651 if (NULL == t->owner && 0 != t->prev_hop)
2653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2654 GNUNET_PEER_resolve (t->prev_hop, &id);
2655 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2656 " sending back to %s\n",
2658 send_prebuilt_message (&msg.header, t->prev_hop, t);
2660 if (NULL != t->owner)
2662 send_client_tunnel_destroy (t->owner, t);
2664 if (NULL != t->client)
2666 send_client_tunnel_destroy (t->client, t);
2672 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2674 * @param t Tunnel which to cancel.
2675 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2678 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2680 struct MeshPeerInfo *peer_info;
2681 struct MeshPeerQueue *pq;
2682 struct MeshPeerQueue *next;
2685 return; /* Was local peer, 0'ed in tunnel_destroy_iterator */
2686 peer_info = peer_get_short (neighbor);
2687 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2690 if (pq->tunnel == t)
2692 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2693 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2695 /* Should have been removed on destroy children */
2698 queue_destroy (pq, GNUNET_YES);
2701 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2703 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2704 peer_info->core_transmit = NULL;
2710 * Destroy the tunnel.
2712 * This function does not generate any warning traffic to clients or peers.
2715 * Remove the tunnel from peer_info's and clients' hashmaps.
2716 * Cancel messages belonging to this tunnel queued to neighbors.
2717 * Free any allocated resources linked to the tunnel.
2719 * @param t the tunnel to destroy
2721 * @return GNUNET_OK on success
2724 tunnel_destroy (struct MeshTunnel *t)
2726 struct MeshClient *c;
2727 struct GNUNET_HashCode hash;
2737 struct GNUNET_PeerIdentity id;
2739 GNUNET_PEER_resolve (t->id.oid, &id);
2740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2741 GNUNET_i2s (&id), t->id.tid);
2743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2747 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2748 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2757 GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels, t->local_tid, t))
2764 if (NULL != t->client)
2768 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
2769 t->local_tid_dest, t))
2775 GNUNET_CONTAINER_multihashmap32_remove (incoming_tunnels,
2776 t->local_tid_dest, t))
2783 if (0 != t->prev_hop)
2785 peer_cancel_queues (t->prev_hop, t);
2786 GNUNET_PEER_change_rc (t->prev_hop, -1);
2788 if (0 != t->next_hop)
2790 peer_cancel_queues (t->next_hop, t);
2791 GNUNET_PEER_change_rc (t->next_hop, -1);
2794 peer_info_remove_tunnel (peer_get_short (t->dest), t);
2797 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2798 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2801 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2802 path_destroy (t->path);
2808 * Tunnel is empty: destroy it.
2810 * Notifies all participants (peers, cleints) about the destruction.
2812 * @param t Tunnel to destroy.
2815 tunnel_destroy_empty (struct MeshTunnel *t)
2819 struct GNUNET_PeerIdentity id;
2821 GNUNET_PEER_resolve (t->id.oid, &id);
2822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2823 "executing destruction of empty tunnel %s [%X]\n",
2824 GNUNET_i2s (&id), t->id.tid);
2828 if (GNUNET_NO == t->destroy)
2829 tunnel_send_destroy (t);
2830 if (0 == t->pending_messages)
2833 t->destroy = GNUNET_YES;
2837 * Initialize a Flow Control structure to the initial state.
2839 * @param fc Flow Control structure to initialize.
2842 fc_init (struct MeshFlowControl *fc)
2844 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2845 fc->last_pid_recv = (uint32_t) -1;
2846 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
2847 fc->last_ack_recv = (uint32_t) -1;
2848 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2849 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2854 * Create a new tunnel
2856 * @param owner Who is the owner of the tunnel (short ID).
2857 * @param tid Tunnel Number of the tunnel.
2858 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2859 * @param local Tunnel Number for the tunnel, for the client point of view.
2861 * @return A new initialized tunnel. NULL on error.
2863 static struct MeshTunnel *
2864 tunnel_new (GNUNET_PEER_Id owner,
2865 MESH_TunnelNumber tid,
2866 struct MeshClient *client,
2867 MESH_TunnelNumber local)
2869 struct MeshTunnel *t;
2870 struct GNUNET_HashCode hash;
2872 if (n_tunnels >= max_tunnels && NULL == client)
2875 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2878 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2880 fc_init (&t->next_fc);
2881 fc_init (&t->prev_fc);
2882 t->local_tid = local;
2884 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2886 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2888 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2889 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2896 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2904 GNUNET_CONTAINER_multihashmap32_put (client->own_tunnels,
2906 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2910 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2920 * Set options in a tunnel, extracted from a bit flag field
2922 * @param t Tunnel to set options to.
2923 * @param options Bit array in host byte order.
2926 tunnel_set_options (struct MeshTunnel *t, uint32_t options)
2928 t->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
2929 GNUNET_YES : GNUNET_NO;
2930 t->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
2931 GNUNET_YES : GNUNET_NO;
2936 * Iterator for deleting each tunnel whose client endpoint disconnected.
2938 * @param cls Closure (client that has disconnected).
2939 * @param key The local tunnel id (used to access the hashmap).
2940 * @param value The value stored at the key (tunnel to destroy).
2942 * @return GNUNET_OK, keep iterating.
2945 tunnel_destroy_iterator (void *cls,
2949 struct MeshTunnel *t = value;
2950 struct MeshClient *c = cls;
2952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2953 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
2954 t->local_tid, t->local_tid_dest, c->id);
2955 client_delete_tunnel (c, t);
2958 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
2960 if (0 != t->next_hop) { /* destroy could come before a path is used */
2961 GNUNET_PEER_change_rc (t->next_hop, -1);
2967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
2969 if (0 != t->prev_hop) { /* destroy could come before a path is used */
2970 GNUNET_PEER_change_rc (t->prev_hop, -1);
2975 tunnel_destroy_empty (t);
2982 * Timeout function, destroys tunnel if called
2984 * @param cls Closure (tunnel to destroy).
2985 * @param tc TaskContext
2988 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2990 struct MeshTunnel *t = cls;
2991 struct GNUNET_PeerIdentity id;
2993 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2994 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2996 GNUNET_PEER_resolve(t->id.oid, &id);
2997 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2998 "Tunnel %s [%X] timed out. Destroying.\n",
2999 GNUNET_i2s(&id), t->id.tid);
3000 if (NULL != t->client)
3001 send_client_tunnel_destroy (t->client, t);
3002 tunnel_destroy (t); /* Do not notify other */
3007 * Resets the tunnel timeout. Starts it if no timeout was running.
3009 * @param t Tunnel whose timeout to reset.
3010 * @param fwd Is this forward?
3012 * TODO use heap to improve efficiency of scheduler.
3013 * FIXME use fwd, keep 2 timers
3016 tunnel_reset_timeout (struct MeshTunnel *t, int fwd)
3018 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
3020 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
3021 GNUNET_SCHEDULER_cancel (t->maintenance_task);
3022 t->maintenance_task =
3023 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3024 (refresh_path_time, 4), &tunnel_timeout, t);
3028 /******************************************************************************/
3029 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3030 /******************************************************************************/
3033 * Function to send a create path packet to a peer.
3035 * @param cls closure
3036 * @param size number of bytes available in buf
3037 * @param buf where the callee should write the message
3038 * @return number of bytes written to buf
3041 send_core_path_create (void *cls, size_t size, void *buf)
3043 struct MeshTunnel *t = cls;
3044 struct GNUNET_MESH_CreateTunnel *msg;
3045 struct GNUNET_PeerIdentity *peer_ptr;
3046 struct MeshPeerPath *p = t->path;
3051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
3053 sizeof (struct GNUNET_MESH_CreateTunnel) +
3054 p->length * sizeof (struct GNUNET_PeerIdentity);
3056 if (size < size_needed || NULL == buf)
3061 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
3062 msg->header.size = htons (size_needed);
3063 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
3064 msg->tid = ntohl (t->id.tid);
3067 if (GNUNET_YES == t->nobuffer)
3068 opt |= GNUNET_MESH_OPTION_NOBUFFER;
3069 if (GNUNET_YES == t->reliable)
3070 opt |= GNUNET_MESH_OPTION_RELIABLE;
3071 msg->opt = htonl (opt);
3072 msg->port = htonl (t->port);
3074 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
3075 for (i = 0; i < p->length; i++)
3077 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
3080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3081 "CREATE PATH (%u bytes long) sent!\n", size_needed);
3087 * Creates a path ack message in buf and frees all unused resources.
3089 * @param cls closure (MeshTransmissionDescriptor)
3090 * @param size number of bytes available in buf
3091 * @param buf where the callee should write the message
3092 * @return number of bytes written to buf
3095 send_core_path_ack (void *cls, size_t size, void *buf)
3097 struct MeshTunnel *t = cls;
3098 struct GNUNET_MESH_PathACK *msg = buf;
3100 GNUNET_assert (NULL != t);
3101 if (sizeof (struct GNUNET_MESH_PathACK) > size)
3106 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
3107 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
3108 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3109 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
3110 msg->tid = htonl (t->id.tid);
3111 msg->peer_id = my_full_id;
3112 msg->ack = htonl (t->prev_fc.last_ack_sent);
3114 /* TODO add signature */
3116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
3117 return sizeof (struct GNUNET_MESH_PathACK);
3122 * Free a transmission that was already queued with all resources
3123 * associated to the request.
3125 * @param queue Queue handler to cancel.
3126 * @param clear_cls Is it necessary to free associated cls?
3129 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3131 struct MeshFlowControl *fc;
3133 if (GNUNET_YES == clear_cls)
3135 switch (queue->type)
3137 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3138 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3139 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3141 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3142 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3143 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3144 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3145 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
3146 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3147 " prebuilt message\n");
3148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3150 GNUNET_MESH_DEBUG_M2S (queue->type));
3152 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3153 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3157 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3158 " type %s unknown!\n",
3159 GNUNET_MESH_DEBUG_M2S (queue->type));
3161 GNUNET_free_non_null (queue->cls);
3163 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3164 queue->peer->queue_tail,
3167 /* Delete from appropriate fc in the tunnel */
3168 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type ||
3169 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type )
3171 if (queue->peer->id == queue->tunnel->prev_hop)
3172 fc = &queue->tunnel->prev_fc;
3173 else if (queue->peer->id == queue->tunnel->next_hop)
3174 fc = &queue->tunnel->next_fc;
3178 GNUNET_free (queue);
3183 GNUNET_free (queue);
3188 * @brief Get the next transmittable message from the queue.
3190 * This will be the head, except in the case of being a data packet
3191 * not allowed by the destination peer.
3193 * @param peer Destination peer.
3195 * @return The next viable MeshPeerQueue element to send to that peer.
3196 * NULL when there are no transmittable messages.
3198 struct MeshPeerQueue *
3199 queue_get_next (const struct MeshPeerInfo *peer)
3201 struct MeshPeerQueue *q;
3203 struct GNUNET_MESH_Data *dmsg;
3204 struct MeshTunnel* t;
3208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
3209 for (q = peer->queue_head; NULL != q; q = q->next)
3212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3214 GNUNET_MESH_DEBUG_M2S (q->type));
3215 dmsg = (struct GNUNET_MESH_Data *) q->cls;
3216 pid = ntohl (dmsg->pid);
3219 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3220 ack = t->next_fc.last_ack_recv;
3222 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3223 ack = t->prev_fc.last_ack_recv;
3226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3231 "* ACK: %u, PID: %u, MID: %u\n",
3232 ack, pid, ntohl (dmsg->mid));
3233 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
3235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3246 "* nothing found\n");
3252 queue_send (void *cls, size_t size, void *buf)
3254 struct MeshPeerInfo *peer = cls;
3255 struct GNUNET_MessageHeader *msg;
3256 struct MeshPeerQueue *queue;
3257 struct MeshTunnel *t;
3258 struct GNUNET_PeerIdentity dst_id;
3259 struct MeshFlowControl *fc;
3264 peer->core_transmit = NULL;
3266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
3267 queue = queue_get_next (peer);
3269 /* Queue has no internal mesh traffic nor sendable payload */
3272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
3273 if (NULL == peer->queue_head)
3274 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
3277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
3279 GNUNET_PEER_resolve (peer->id, &dst_id);
3280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3282 GNUNET_i2s (&dst_id));
3283 /* Check if buffer size is enough for the message */
3284 if (queue->size > size)
3286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3287 "* not enough room, reissue\n");
3288 peer->core_transmit =
3289 GNUNET_CORE_notify_transmit_ready (core_handle,
3292 GNUNET_TIME_UNIT_FOREVER_REL,
3299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
3302 GNUNET_assert (0 < t->pending_messages);
3303 t->pending_messages--;
3307 switch (queue->type)
3310 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3311 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3312 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3313 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3314 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3315 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3316 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3317 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
3318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3320 GNUNET_MESH_DEBUG_M2S (queue->type));
3322 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3323 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3324 data_size = send_core_data_raw (queue->cls, size, buf);
3325 msg = (struct GNUNET_MessageHeader *) buf;
3326 type = ntohs (msg->type);
3328 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
3330 data_size = send_core_path_create (queue->cls, size, buf);
3332 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
3334 data_size = send_core_path_ack (queue->cls, size, buf);
3338 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3339 "* type unknown: %u\n",
3344 if (0 < drop_percent &&
3345 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
3347 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3348 "Dropping message of type %s\n",
3349 GNUNET_MESH_DEBUG_M2S(queue->type));
3352 /* Free queue, but cls was freed by send_core_* */
3353 queue_destroy (queue, GNUNET_NO);
3355 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
3356 pid = ((struct GNUNET_MESH_Data *) buf)->pid;
3360 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3361 t->next_fc.last_pid_sent = pid;
3362 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES);
3363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3365 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3367 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3368 t->prev_fc.last_pid_sent = pid;
3369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3371 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3372 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO);
3378 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
3384 /* If more data in queue, send next */
3385 queue = queue_get_next (peer);
3388 struct GNUNET_PeerIdentity id;
3390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
3391 GNUNET_PEER_resolve (peer->id, &id);
3392 peer->core_transmit =
3393 GNUNET_CORE_notify_transmit_ready(core_handle,
3396 GNUNET_TIME_UNIT_FOREVER_REL,
3402 if (NULL != peer->queue_head)
3404 if (peer->id == t->next_hop)
3406 else if (peer->id == t->prev_hop)
3413 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task && fc->queue_n > 0)
3415 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3416 "* %s starting poll timeout\n",
3417 GNUNET_i2s (&my_full_id));
3419 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3423 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
3429 * @brief Queue and pass message to core when possible.
3431 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3432 * accounts for it. In case the queue is full, the message is dropped and
3435 * Otherwise, message is treated as internal and allowed to go regardless of
3438 * @param cls Closure (@c type dependant). It will be used by queue_send to
3439 * build the message to be sent if not already prebuilt.
3440 * @param type Type of the message, 0 for a raw message.
3441 * @param size Size of the message.
3442 * @param dst Neighbor to send message to.
3443 * @param t Tunnel this message belongs to.
3446 queue_add (void *cls, uint16_t type, size_t size,
3447 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3449 struct MeshPeerQueue *queue;
3450 struct GNUNET_PeerIdentity id;
3451 struct MeshFlowControl *fc;
3455 priority = GNUNET_NO;
3456 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3460 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3466 if (fc->queue_n >= t->queue_max)
3468 /* If this isn't a retransmission, drop the message */
3469 if (GNUNET_NO == t->reliable ||
3470 (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) ||
3471 (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type))
3473 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
3476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3477 "queue full: %u/%u\n",
3478 fc->queue_n, t->queue_max);
3479 return; /* Drop this message */
3481 priority = GNUNET_YES;
3485 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3491 if (GNUNET_YES == priority)
3493 struct GNUNET_MESH_Data *d;
3497 GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue);
3498 d = (struct GNUNET_MESH_Data *) queue->cls;
3500 for (queue = dst->queue_tail; NULL != queue; queue = queue->prev)
3502 if (queue->type != type)
3504 d = (struct GNUNET_MESH_Data *) queue->cls;
3511 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3512 if (NULL == dst->core_transmit)
3514 GNUNET_PEER_resolve (dst->id, &id);
3515 dst->core_transmit =
3516 GNUNET_CORE_notify_transmit_ready (core_handle,
3519 GNUNET_TIME_UNIT_FOREVER_REL,
3525 t->pending_messages++;
3529 /******************************************************************************/
3530 /******************** MESH NETWORK HANDLERS **************************/
3531 /******************************************************************************/
3535 * Core handler for path creation
3537 * @param cls closure
3538 * @param message message
3539 * @param peer peer identity this notification is about
3541 * @return GNUNET_OK to keep the connection open,
3542 * GNUNET_SYSERR to close it (signal serious error)
3545 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3546 const struct GNUNET_MessageHeader *message)
3548 unsigned int own_pos;
3551 MESH_TunnelNumber tid;
3552 struct GNUNET_MESH_CreateTunnel *msg;
3553 struct GNUNET_PeerIdentity *pi;
3554 struct MeshPeerPath *path;
3555 struct MeshPeerInfo *dest_peer_info;
3556 struct MeshPeerInfo *orig_peer_info;
3557 struct MeshTunnel *t;
3559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3560 "Received a path create msg [%s]\n",
3561 GNUNET_i2s (&my_full_id));
3562 size = ntohs (message->size);
3563 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3565 GNUNET_break_op (0);
3569 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3570 if (size % sizeof (struct GNUNET_PeerIdentity))
3572 GNUNET_break_op (0);
3575 size /= sizeof (struct GNUNET_PeerIdentity);
3578 GNUNET_break_op (0);
3581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3582 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3584 tid = ntohl (msg->tid);
3585 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3586 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3587 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
3588 t = tunnel_get (pi, tid);
3589 if (NULL == t) /* might be a local tunnel */
3593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3594 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3600 t->port = ntohl (msg->port);
3601 opt = ntohl (msg->opt);
3602 if (0 != (opt & GNUNET_MESH_OPTION_NOBUFFER))
3604 t->nobuffer = GNUNET_YES;
3607 if (0 != (opt & GNUNET_MESH_OPTION_RELIABLE))
3609 t->reliable = GNUNET_YES;
3611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3613 tunnel_reset_timeout (t, GNUNET_YES); // FIXME
3615 t->state = MESH_TUNNEL_WAITING;
3617 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3618 if (NULL == dest_peer_info)
3620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3621 " Creating PeerInfo for destination.\n");
3622 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3623 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3624 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3626 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3628 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3629 if (NULL == orig_peer_info)
3631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3632 " Creating PeerInfo for origin.\n");
3633 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3634 orig_peer_info->id = GNUNET_PEER_intern (pi);
3635 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3636 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3639 path = path_new (size);
3641 for (i = 0; i < size; i++)
3643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3644 GNUNET_i2s (&pi[i]));
3645 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3646 if (path->peers[i] == myid)
3649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3650 if (own_pos == 0 && path->peers[own_pos] != myid)
3652 /* create path: self not found in path through self */
3653 GNUNET_break_op (0);
3654 path_destroy (path);
3658 path_add_to_peers (path, GNUNET_NO);
3659 tunnel_use_path (t, path);
3661 peer_info_add_tunnel (dest_peer_info, t);
3663 if (own_pos == size - 1)
3665 struct MeshClient *c;
3667 /* Find target client */
3668 c = GNUNET_CONTAINER_multihashmap32_get (ports, t->port);
3671 /* TODO send reject */
3675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3676 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3678 /* Assign local tid */
3679 while (NULL != tunnel_get_incoming (next_local_tid))
3680 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3681 t->local_tid_dest = next_local_tid++;
3682 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3684 if (GNUNET_YES == t->reliable)
3686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
3687 t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
3689 t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
3692 tunnel_add_client (t, c);
3693 send_client_tunnel_create (t);
3698 struct MeshPeerPath *path2;
3700 t->next_hop = path->peers[own_pos + 1];
3701 GNUNET_PEER_change_rc(t->next_hop, 1);
3703 /* It's for somebody else! Retransmit. */
3704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3705 path2 = path_duplicate (path);
3706 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3707 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3708 send_create_path (t);
3716 * Core handler for path ACKs
3718 * @param cls closure
3719 * @param message message
3720 * @param peer peer identity this notification is about
3722 * @return GNUNET_OK to keep the connection open,
3723 * GNUNET_SYSERR to close it (signal serious error)
3726 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3727 const struct GNUNET_MessageHeader *message)
3729 struct GNUNET_MESH_PathACK *msg;
3730 struct MeshPeerInfo *peer_info;
3731 struct MeshPeerPath *p;
3732 struct MeshTunnel *t;
3734 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3735 GNUNET_i2s (&my_full_id));
3736 msg = (struct GNUNET_MESH_PathACK *) message;
3737 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3740 /* TODO notify that we don't know the tunnel */
3741 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3743 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3747 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3749 peer_info = peer_get (&msg->peer_id);
3750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3751 GNUNET_i2s (&msg->peer_id));
3752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3755 /* Add path to peers? */
3759 path_add_to_peers (p, GNUNET_YES);
3765 t->state = MESH_TUNNEL_READY;
3766 t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0;
3767 t->prev_fc.last_ack_sent = ntohl (msg->ack);
3769 /* Message for us? */
3770 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3773 if (NULL == t->owner)
3775 GNUNET_break_op (0);
3778 if (NULL != peer_info->dhtget)
3780 GNUNET_DHT_get_stop (peer_info->dhtget);
3781 peer_info->dhtget = NULL;
3783 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_YES);
3784 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_NO);
3788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3789 " not for us, retransmitting...\n");
3790 peer_info = peer_get (&msg->oid);
3791 send_prebuilt_message (message, t->prev_hop, t);
3797 * Core handler for notifications of broken paths
3799 * @param cls closure
3800 * @param message message
3801 * @param peer peer identity this notification is about
3803 * @return GNUNET_OK to keep the connection open,
3804 * GNUNET_SYSERR to close it (signal serious error)
3807 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3808 const struct GNUNET_MessageHeader *message)
3810 struct GNUNET_MESH_PathBroken *msg;
3811 struct MeshTunnel *t;
3813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3814 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3815 msg = (struct GNUNET_MESH_PathBroken *) message;
3816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3817 GNUNET_i2s (&msg->peer1));
3818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3819 GNUNET_i2s (&msg->peer2));
3820 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3823 GNUNET_break_op (0);
3826 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3827 GNUNET_PEER_search (&msg->peer2));
3834 * Core handler for tunnel destruction
3836 * @param cls closure
3837 * @param message message
3838 * @param peer peer identity this notification is about
3840 * @return GNUNET_OK to keep the connection open,
3841 * GNUNET_SYSERR to close it (signal serious error)
3844 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3845 const struct GNUNET_MessageHeader *message)
3847 struct GNUNET_MESH_TunnelDestroy *msg;
3848 struct MeshTunnel *t;
3850 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3852 "Got a TUNNEL DESTROY packet from %s\n",
3854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3855 " for tunnel %s [%u]\n",
3856 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3857 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3860 /* Probably already got the message from another path,
3861 * destroyed the tunnel and retransmitted to children.
3864 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3868 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3871 t->local_tid, t->local_tid_dest);
3873 if (GNUNET_PEER_search (peer) == t->prev_hop)
3875 // TODO check owner's signature
3876 // TODO add owner's signatue to tunnel for retransmission
3877 peer_cancel_queues (t->prev_hop, t);
3878 GNUNET_PEER_change_rc (t->prev_hop, -1);
3881 else if (GNUNET_PEER_search (peer) == t->next_hop)
3883 // TODO check dest's signature
3884 // TODO add dest's signatue to tunnel for retransmission
3885 peer_cancel_queues (t->next_hop, t);
3886 GNUNET_PEER_change_rc (t->next_hop, -1);
3891 GNUNET_break_op (0);
3892 // TODO check both owner AND destination's signature to see which matches
3893 // TODO restransmit in appropriate direction
3896 tunnel_destroy_empty (t);
3898 // TODO: add timeout to destroy the tunnel anyway
3904 * Generic handler for mesh network payload traffic.
3906 * @param peer Peer identity this notification is about.
3907 * @param message Data message.
3908 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
3910 * @return GNUNET_OK to keep the connection open,
3911 * GNUNET_SYSERR to close it (signal serious error)
3914 handle_mesh_data (const struct GNUNET_PeerIdentity *peer,
3915 const struct GNUNET_MessageHeader *message,
3918 struct GNUNET_MESH_Data *msg;
3919 struct MeshFlowControl *fc;
3920 struct MeshTunnelReliability *rel;
3921 struct MeshTunnel *t;
3922 struct MeshClient *c;
3928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
3929 GNUNET_MESH_DEBUG_M2S (ntohs (message->type)),
3932 size = ntohs (message->size);
3934 sizeof (struct GNUNET_MESH_Data) +
3935 sizeof (struct GNUNET_MessageHeader))
3940 msg = (struct GNUNET_MESH_Data *) message;
3941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
3942 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3944 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3947 /* TODO notify back: we don't know this tunnel */
3948 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3949 GNUNET_break_op (0);
3953 /* Initialize FWD/BCK data */
3954 pid = ntohl (msg->pid);
3955 fc = fwd ? &t->prev_fc : &t->next_fc;
3956 c = fwd ? t->client : t->owner;
3957 rel = fwd ? t->bck_rel : t->fwd_rel;
3958 hop = fwd ? t->next_hop : t->prev_hop;
3959 if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
3961 GNUNET_STATISTICS_update (stats, "# unsolicited data", 1, GNUNET_NO);
3962 GNUNET_break_op (0);
3963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3964 "Received PID %u, (prev %u), ACK %u\n",
3965 pid, fc->last_pid_recv, fc->last_ack_sent);
3969 tunnel_reset_timeout (t, fwd);
3972 /* TODO signature verification */
3973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us! sending to client\n");
3974 GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
3975 if (GMC_is_pid_bigger (pid, fc->last_pid_recv))
3979 mid = ntohl (msg->mid);
3980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3981 " pid %u (mid %u) not seen yet\n", pid, mid);
3982 fc->last_pid_recv = pid;
3984 if (GNUNET_NO == t->reliable ||
3985 ( !GMC_is_pid_bigger (rel->mid_recv, mid) &&
3986 GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) )
3988 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3989 "!!! RECV %u\n", ntohl (msg->mid));
3990 if (GNUNET_YES == t->reliable)
3992 /* Is this the exact next expected messasge? */
3993 if (mid == rel->mid_recv)
3995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
3997 tunnel_send_client_data (t, msg, fwd);
3998 tunnel_send_client_buffered_data (t, c, rel);
4002 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
4003 tunnel_add_buffered_data (t, msg, rel);
4006 else /* Tunnel unreliable, send to clients directly */
4008 tunnel_send_client_data (t, msg, fwd);
4013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4014 " MID %u not expected (%u - %u), dropping!\n",
4015 ntohl (msg->mid), rel->mid_recv, rel->mid_recv + 64);
4020 // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
4021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4022 " Pid %u not expected (%u+), dropping!\n",
4023 pid, fc->last_pid_recv + 1);
4025 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, fwd);
4028 fc->last_pid_recv = pid;
4034 ttl = ntohl (msg->ttl);
4035 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4038 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4039 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4040 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, fwd);
4046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
4047 send_prebuilt_message (message, hop, t);
4048 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4055 * Core handler for mesh network traffic going from the origin to a peer
4057 * @param cls Closure (unused).
4058 * @param message Message received.
4059 * @param peer Peer who sent the message.
4061 * @return GNUNET_OK to keep the connection open,
4062 * GNUNET_SYSERR to close it (signal serious error)
4065 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4066 const struct GNUNET_MessageHeader *message)
4068 return handle_mesh_data (peer, message, GNUNET_YES);
4072 * Core handler for mesh network traffic towards the owner of a tunnel.
4074 * @param cls Closure (unused).
4075 * @param message Message received.
4076 * @param peer Peer who sent the message.
4078 * @return GNUNET_OK to keep the connection open,
4079 * GNUNET_SYSERR to close it (signal serious error)
4082 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4083 const struct GNUNET_MessageHeader *message)
4085 return handle_mesh_data (peer, message, GNUNET_NO);
4090 * Core handler for mesh network traffic end-to-end ACKs.
4092 * @param cls Closure.
4093 * @param message Message.
4094 * @param peer Peer identity this notification is about.
4096 * @return GNUNET_OK to keep the connection open,
4097 * GNUNET_SYSERR to close it (signal serious error)
4100 handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4101 const struct GNUNET_MessageHeader *message)
4103 struct GNUNET_MESH_DataACK *msg;
4104 struct MeshTunnelReliability *rel;
4105 struct MeshReliableMessage *copy;
4106 struct MeshReliableMessage *next;
4107 struct MeshTunnel *t;
4113 type = ntohs (message->type);
4114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message from %s!\n",
4115 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4116 msg = (struct GNUNET_MESH_DataACK *) message;
4118 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4121 /* TODO notify that we dont know this tunnel (whom)? */
4122 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4125 ack = ntohl (msg->mid);
4126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4128 /* Is this a forward or backward ACK? */
4129 id = GNUNET_PEER_search (peer);
4130 if (t->next_hop == id && GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type)
4132 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4133 if (NULL == t->owner)
4135 send_prebuilt_message (message, t->prev_hop, t);
4139 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES);
4141 else if (t->prev_hop == id && GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK == type)
4143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4144 if (NULL == t->client)
4146 send_prebuilt_message (message, t->next_hop, t);
4150 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO);
4154 GNUNET_break_op (0);
4158 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %u\n", ack);
4159 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
4161 if (GMC_is_pid_bigger (copy->mid, ack))
4163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
4164 tunnel_free_sent_reliable (t, msg, rel);
4168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
4170 tunnel_free_reliable_message (copy);
4173 if (GNUNET_YES == work)
4175 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
4177 GNUNET_SCHEDULER_cancel (rel->retry_task);
4178 if (NULL == rel->head_sent)
4180 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
4184 struct GNUNET_TIME_Absolute new_target;
4185 struct GNUNET_TIME_Relative delay;
4187 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
4188 MESH_RETRANSMIT_MARGIN);
4189 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
4191 delay = GNUNET_TIME_absolute_get_remaining (new_target);
4193 GNUNET_SCHEDULER_add_delayed (delay,
4194 &tunnel_retransmit_message,
4200 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK, GNUNET_YES);
4206 * Core handler for mesh network traffic point-to-point acks.
4208 * @param cls closure
4209 * @param message message
4210 * @param peer peer identity this notification is about
4212 * @return GNUNET_OK to keep the connection open,
4213 * GNUNET_SYSERR to close it (signal serious error)
4216 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4217 const struct GNUNET_MessageHeader *message)
4219 struct GNUNET_MESH_ACK *msg;
4220 struct MeshTunnel *t;
4221 struct MeshFlowControl *fc;
4225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4227 msg = (struct GNUNET_MESH_ACK *) message;
4229 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4233 /* TODO notify that we dont know this tunnel (whom)? */
4234 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4237 ack = ntohl (msg->pid);
4238 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4240 /* Is this a forward or backward ACK? */
4241 id = GNUNET_PEER_search (peer);
4242 if (t->next_hop == id)
4244 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4247 else if (t->prev_hop == id)
4249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4254 GNUNET_break_op (0);
4258 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
4259 GMC_is_pid_bigger (ack, fc->last_ack_recv))
4261 GNUNET_SCHEDULER_cancel (fc->poll_task);
4262 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4263 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4265 fc->last_ack_recv = ack;
4266 peer_unlock_queue (id);
4268 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, t->next_hop == id);
4275 * Core handler for mesh network traffic point-to-point ack polls.
4277 * @param cls closure
4278 * @param message message
4279 * @param peer peer identity this notification is about
4281 * @return GNUNET_OK to keep the connection open,
4282 * GNUNET_SYSERR to close it (signal serious error)
4285 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4286 const struct GNUNET_MessageHeader *message)
4288 struct GNUNET_MESH_Poll *msg;
4289 struct MeshTunnel *t;
4290 struct MeshFlowControl *fc;
4295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
4298 msg = (struct GNUNET_MESH_Poll *) message;
4300 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4304 /* TODO notify that we dont know this tunnel (whom)? */
4305 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4306 GNUNET_break_op (0);
4310 /* Is this a forward or backward ACK? */
4311 id = GNUNET_PEER_search(peer);
4312 pid = ntohl (msg->pid);
4313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid);
4314 if (t->next_hop == id)
4316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", t->next_fc.last_pid_recv);
4319 old = fc->last_pid_recv;
4320 fc->last_pid_recv = pid;
4321 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, GNUNET_NO);
4323 else if (t->prev_hop == id)
4325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", t->prev_fc.last_pid_recv);
4328 old = fc->last_pid_recv;
4329 fc->last_pid_recv = pid;
4330 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, GNUNET_YES);
4335 if (GNUNET_YES == t->reliable)
4336 fc->last_pid_recv = old;
4343 * Core handler for mesh keepalives.
4345 * @param cls closure
4346 * @param message message
4347 * @param peer peer identity this notification is about
4348 * @return GNUNET_OK to keep the connection open,
4349 * GNUNET_SYSERR to close it (signal serious error)
4351 * TODO: Check who we got this from, to validate route.
4354 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4355 const struct GNUNET_MessageHeader *message)
4357 struct GNUNET_MESH_TunnelKeepAlive *msg;
4358 struct MeshTunnel *t;
4360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4363 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4364 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4368 /* TODO notify that we dont know that tunnel */
4369 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4374 tunnel_reset_timeout (t, GNUNET_YES); // FIXME
4375 if (NULL != t->client || 0 == t->next_hop || myid == t->next_hop)
4378 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4379 send_prebuilt_message (message, t->next_hop, t);
4386 * Functions to handle messages from core
4388 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4389 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4390 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4391 sizeof (struct GNUNET_MESH_PathBroken)},
4392 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4393 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4394 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4395 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4396 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK,
4397 sizeof (struct GNUNET_MESH_DataACK)},
4398 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK,
4399 sizeof (struct GNUNET_MESH_DataACK)},
4400 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
4401 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4402 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4403 sizeof (struct GNUNET_MESH_ACK)},
4404 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4405 sizeof (struct GNUNET_MESH_Poll)},
4406 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4407 sizeof (struct GNUNET_MESH_PathACK)},
4413 /******************************************************************************/
4414 /**************** MESH LOCAL HANDLER HELPERS ***********************/
4415 /******************************************************************************/
4420 * notify_client_connection_failure: notify a client that the connection to the
4421 * requested remote peer is not possible (for instance, no route found)
4422 * Function called when the socket is ready to queue more data. "buf" will be
4423 * NULL and "size" zero if the socket was closed for writing in the meantime.
4425 * @param cls closure
4426 * @param size number of bytes available in buf
4427 * @param buf where the callee should write the message
4428 * @return number of bytes written to buf
4431 notify_client_connection_failure (void *cls, size_t size, void *buf)
4434 struct MeshPeerInfo *peer_info;
4435 struct GNUNET_MESH_PeerControl *msg;
4436 struct GNUNET_PeerIdentity id;
4438 if (0 == size && NULL == buf)
4440 // TODO retry? cancel?
4444 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
4445 peer_info = (struct MeshPeerInfo *) cls;
4446 msg = (struct GNUNET_MESH_PeerControl *) buf;
4447 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
4448 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
4449 // msg->tunnel_id = htonl(peer_info->t->tid);
4450 GNUNET_PEER_resolve (peer_info->id, &id);
4451 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
4459 * Send keepalive packets for a tunnel.
4461 * @param cls Closure (tunnel for which to send the keepalive).
4462 * @param tc Notification context.
4464 * FIXME: add a refresh reset in case of normal unicast traffic is doing the job
4467 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4469 struct MeshTunnel *t = cls;
4470 struct GNUNET_MESH_TunnelKeepAlive *msg;
4471 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
4474 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
4475 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
4476 NULL == t->owner || 0 == t->local_tid)
4481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4482 "sending keepalive for tunnel %d\n", t->id.tid);
4484 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
4485 msg->header.size = htons (size);
4486 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
4487 msg->oid = my_full_id;
4488 msg->tid = htonl (t->id.tid);
4489 send_prebuilt_message (&msg->header, t->next_hop, t);
4491 t->maintenance_task =
4492 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
4497 * Function to process paths received for a new peer addition. The recorded
4498 * paths form the initial tunnel, which can be optimized later.
4499 * Called on each result obtained for the DHT search.
4501 * @param cls closure
4502 * @param exp when will this value expire
4503 * @param key key of the result
4504 * @param get_path path of the get request
4505 * @param get_path_length lenght of get_path
4506 * @param put_path path of the put request
4507 * @param put_path_length length of the put_path
4508 * @param type type of the result
4509 * @param size number of bytes in data
4510 * @param data pointer to the result data
4513 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4514 const struct GNUNET_HashCode * key,
4515 const struct GNUNET_PeerIdentity *get_path,
4516 unsigned int get_path_length,
4517 const struct GNUNET_PeerIdentity *put_path,
4518 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4519 size_t size, const void *data)
4521 struct MeshPeerInfo *peer = cls;
4522 struct MeshPeerPath *p;
4523 struct GNUNET_PeerIdentity pi;
4526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4527 GNUNET_PEER_resolve (peer->id, &pi);
4528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4530 p = path_build_from_dht (get_path, get_path_length,
4531 put_path, put_path_length);
4532 path_add_to_peers (p, GNUNET_NO);
4534 for (i = 0; i < peer->ntunnels; i++)
4536 struct GNUNET_PeerIdentity id;
4538 GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id);
4539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n",
4540 GNUNET_i2s (&id), peer->tunnels[i]->id.tid,
4541 peer->tunnels[i]->local_tid,
4542 peer->tunnels[i]->local_tid_dest);
4543 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
4545 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
4546 peer_connect (peer, peer->tunnels[i]);
4554 /******************************************************************************/
4555 /********************* MESH LOCAL HANDLES **************************/
4556 /******************************************************************************/
4560 * Handler for client connection.
4562 * @param cls Closure (unused).
4563 * @param client Client handler.
4566 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
4568 struct MeshClient *c;
4572 c = GNUNET_malloc (sizeof (struct MeshClient));
4574 GNUNET_SERVER_client_keep (client);
4575 GNUNET_SERVER_client_set_user_context (client, c);
4576 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4581 * Handler for client disconnection
4583 * @param cls closure
4584 * @param client identification of the client; NULL
4585 * for the last call when the server is destroyed
4588 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4590 struct MeshClient *c;
4591 struct MeshClient *next;
4593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
4596 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4600 c = client_get (client);
4603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
4605 GNUNET_SERVER_client_drop (c->handle);
4606 c->shutting_down = GNUNET_YES;
4607 if (NULL != c->own_tunnels)
4609 GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels,
4610 &tunnel_destroy_iterator, c);
4611 GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels);
4614 if (NULL != c->incoming_tunnels)
4616 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels,
4617 &tunnel_destroy_iterator, c);
4618 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels);
4621 if (NULL != c->ports)
4622 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
4624 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4625 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
4627 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4632 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
4634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4640 * Handler for new clients
4642 * @param cls closure
4643 * @param client identification of the client
4644 * @param message the actual message, which includes messages the client wants
4647 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4648 const struct GNUNET_MessageHeader *message)
4650 struct GNUNET_MESH_ClientConnect *cc_msg;
4651 struct MeshClient *c;
4656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
4658 /* Check data sanity */
4659 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4660 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4661 if (0 != (size % sizeof (uint32_t)))
4664 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4667 size /= sizeof (uint32_t);
4669 /* Initialize new client structure */
4670 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
4671 c->id = next_client_id++; /* overflow not important: just for debug */
4672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
4673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
4678 p = (uint32_t *) &cc_msg[1];
4679 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
4680 for (i = 0; i < size; i++)
4683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
4685 /* store in client's hashmap */
4686 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
4687 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4688 /* store in global hashmap */
4689 /* FIXME only allow one client to have the port open,
4690 * have a backup hashmap with waiting clients */
4691 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
4692 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4696 c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4697 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4698 GNUNET_SERVER_notification_context_add (nc, client);
4699 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
4701 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
4707 * Handler for requests of new tunnels
4709 * @param cls Closure.
4710 * @param client Identification of the client.
4711 * @param message The actual message.
4714 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
4715 const struct GNUNET_MessageHeader *message)
4717 struct GNUNET_MESH_TunnelMessage *t_msg;
4718 struct MeshPeerInfo *peer_info;
4719 struct MeshTunnel *t;
4720 struct MeshClient *c;
4721 MESH_TunnelNumber tid;
4723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
4725 /* Sanity check for client registration */
4726 if (NULL == (c = client_get (client)))
4729 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4732 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4734 /* Message size sanity check */
4735 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4738 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4742 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4744 GNUNET_i2s (&t_msg->peer));
4745 /* Sanity check for tunnel numbering */
4746 tid = ntohl (t_msg->tunnel_id);
4747 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4750 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4753 /* Sanity check for duplicate tunnel IDs */
4754 if (NULL != tunnel_get_by_local_id (c, tid))
4757 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4762 while (NULL != tunnel_get_by_pi (myid, next_tid))
4763 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4764 t = tunnel_new (myid, next_tid, c, tid);
4765 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4769 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4772 t->port = ntohl (t_msg->port);
4773 tunnel_set_options (t, ntohl (t_msg->opt));
4774 if (GNUNET_YES == t->reliable)
4776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
4777 t->fwd_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
4779 t->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
4782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
4783 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
4785 peer_info = peer_get (&t_msg->peer);
4786 peer_info_add_tunnel (peer_info, t);
4787 peer_connect (peer_info, t);
4788 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4794 * Handler for requests of deleting tunnels
4796 * @param cls closure
4797 * @param client identification of the client
4798 * @param message the actual message
4801 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4802 const struct GNUNET_MessageHeader *message)
4804 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4805 struct MeshClient *c;
4806 struct MeshTunnel *t;
4807 MESH_TunnelNumber tid;
4809 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4810 "Got a DESTROY TUNNEL from client!\n");
4812 /* Sanity check for client registration */
4813 if (NULL == (c = client_get (client)))
4816 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4821 /* Message sanity check */
4822 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4825 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4829 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4831 /* Retrieve tunnel */
4832 tid = ntohl (tunnel_msg->tunnel_id);
4833 t = tunnel_get_by_local_id(c, tid);
4836 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4838 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4842 /* Cleanup after the tunnel */
4843 client_delete_tunnel (c, t);
4850 peer_info_remove_tunnel (peer_get_short (t->dest), t);
4854 /* The tunnel will be destroyed when the last message is transmitted. */
4855 tunnel_destroy_empty (t);
4857 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4863 * Handler for client traffic
4865 * @param cls closure
4866 * @param client identification of the client
4867 * @param message the actual message
4870 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
4871 const struct GNUNET_MessageHeader *message)
4873 struct GNUNET_MESH_LocalData *data_msg;
4874 struct MeshClient *c;
4875 struct MeshTunnel *t;
4876 struct MeshFlowControl *fc;
4877 MESH_TunnelNumber tid;
4880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4881 "Got data from a client!\n");
4883 /* Sanity check for client registration */
4884 if (NULL == (c = client_get (client)))
4887 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4892 data_msg = (struct GNUNET_MESH_LocalData *) message;
4894 /* Sanity check for message size */
4895 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
4896 if (size < sizeof (struct GNUNET_MessageHeader))
4899 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4903 /* Tunnel exists? */
4904 tid = ntohl (data_msg->tid);
4905 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI)
4908 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4911 t = tunnel_get_by_local_id (c, tid);
4915 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4919 /* Is the client in the tunnel? */
4920 if ( !( (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
4922 t->owner->handle == client)
4924 (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
4926 t->client->handle == client) ) )
4929 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4933 /* Ok, everything is correct, send the message
4934 * (pretend we got it from a mesh peer)
4937 struct GNUNET_MESH_Data *payload;
4938 char cbuf[sizeof(struct GNUNET_MESH_Data) + size];
4940 fc = tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? &t->prev_fc : &t->next_fc;
4941 if (GNUNET_YES == t->reliable)
4943 struct MeshTunnelReliability *rel;
4944 struct MeshReliableMessage *copy;
4946 rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel;
4947 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage)
4948 + sizeof(struct GNUNET_MESH_Data)
4950 copy->mid = rel->mid_sent++;
4951 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->mid);
4952 copy->timestamp = GNUNET_TIME_absolute_get ();
4955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
4956 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
4957 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
4960 GNUNET_TIME_relative_multiply (rel->expected_delay,
4961 MESH_RETRANSMIT_MARGIN);
4963 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
4964 &tunnel_retransmit_message,
4967 payload = (struct GNUNET_MESH_Data *) ©[1];
4968 payload->mid = htonl (copy->mid);
4972 payload = (struct GNUNET_MESH_Data *) cbuf;
4973 payload->mid = htonl (fc->last_pid_recv + 1);
4975 memcpy (&payload[1], &data_msg[1], size);
4976 payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size);
4977 payload->header.type = htons (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ?
4978 GNUNET_MESSAGE_TYPE_MESH_UNICAST :
4979 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4980 GNUNET_PEER_resolve(t->id.oid, &payload->oid);;
4981 payload->tid = htonl (t->id.tid);
4982 payload->ttl = htonl (default_ttl);
4983 payload->pid = htonl (fc->last_pid_recv + 1);
4984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4985 " calling generic handler...\n");
4986 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4987 handle_mesh_unicast (NULL, &my_full_id, &payload->header);
4989 handle_mesh_to_orig (NULL, &my_full_id, &payload->header);
4991 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4992 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4999 * Handler for client's ACKs for payload traffic.
5001 * @param cls Closure (unused).
5002 * @param client Identification of the client.
5003 * @param message The actual message.
5006 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5007 const struct GNUNET_MessageHeader *message)
5009 struct GNUNET_MESH_LocalAck *msg;
5010 struct MeshTunnel *t;
5011 struct MeshClient *c;
5012 MESH_TunnelNumber tid;
5014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5015 /* Sanity check for client registration */
5016 if (NULL == (c = client_get (client)))
5019 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5024 msg = (struct GNUNET_MESH_LocalAck *) message;
5026 /* Tunnel exists? */
5027 tid = ntohl (msg->tunnel_id);
5028 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5029 t = tunnel_get_by_local_id (c, tid);
5033 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5034 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5035 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5039 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5040 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5042 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5043 t->prev_fc.last_ack_recv++;
5044 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_NO);
5048 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5049 t->next_fc.last_ack_recv++;
5050 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_YES);
5053 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5061 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5063 * @param cls Closure (client handle).
5064 * @param key Key (hashed tunnel ID, unused).
5065 * @param value Tunnel info.
5067 * @return GNUNET_YES, to keep iterating.
5070 monitor_all_tunnels_iterator (void *cls,
5071 const struct GNUNET_HashCode * key,
5074 struct GNUNET_SERVER_Client *client = cls;
5075 struct MeshTunnel *t = value;
5076 struct GNUNET_MESH_LocalMonitor *msg;
5078 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5079 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5080 msg->tunnel_id = htonl (t->id.tid);
5081 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5082 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5083 GNUNET_PEER_resolve (t->dest, &msg->destination);
5085 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5086 "* sending info about tunnel %s [%u]\n",
5087 GNUNET_i2s (&msg->owner), t->id.tid);
5089 GNUNET_SERVER_notification_context_unicast (nc, client,
5090 &msg->header, GNUNET_NO);
5096 * Handler for client's MONITOR request.
5098 * @param cls Closure (unused).
5099 * @param client Identification of the client.
5100 * @param message The actual message.
5103 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5104 const struct GNUNET_MessageHeader *message)
5106 struct MeshClient *c;
5108 /* Sanity check for client registration */
5109 if (NULL == (c = client_get (client)))
5112 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5116 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5117 "Received get tunnels request from client %u\n",
5119 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5120 monitor_all_tunnels_iterator,
5122 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5123 "Get tunnels request from client %u completed\n",
5125 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5130 * Handler for client's MONITOR_TUNNEL request.
5132 * @param cls Closure (unused).
5133 * @param client Identification of the client.
5134 * @param message The actual message.
5137 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5138 const struct GNUNET_MessageHeader *message)
5140 const struct GNUNET_MESH_LocalMonitor *msg;
5141 struct GNUNET_MESH_LocalMonitor *resp;
5142 struct MeshClient *c;
5143 struct MeshTunnel *t;
5145 /* Sanity check for client registration */
5146 if (NULL == (c = client_get (client)))
5149 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5153 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5154 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5155 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5158 ntohl (msg->tunnel_id));
5159 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5162 /* We don't know the tunnel FIXME */
5163 struct GNUNET_MESH_LocalMonitor warn;
5166 GNUNET_SERVER_notification_context_unicast (nc, client,
5169 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5173 /* Initialize context */
5174 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5176 GNUNET_PEER_resolve (t->dest, &resp->destination);
5177 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5178 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5179 &resp->header, GNUNET_NO);
5182 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5183 "Monitor tunnel request from client %u completed\n",
5185 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5190 * Functions to handle messages from clients
5192 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5193 {&handle_local_new_client, NULL,
5194 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5195 {&handle_local_tunnel_create, NULL,
5196 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5197 sizeof (struct GNUNET_MESH_TunnelMessage)},
5198 {&handle_local_tunnel_destroy, NULL,
5199 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5200 sizeof (struct GNUNET_MESH_TunnelMessage)},
5201 {&handle_local_data, NULL,
5202 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
5203 {&handle_local_ack, NULL,
5204 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5205 sizeof (struct GNUNET_MESH_LocalAck)},
5206 {&handle_local_get_tunnels, NULL,
5207 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5208 sizeof (struct GNUNET_MessageHeader)},
5209 {&handle_local_show_tunnel, NULL,
5210 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5211 sizeof (struct GNUNET_MESH_LocalMonitor)},
5217 * Method called whenever a given peer connects.
5219 * @param cls closure
5220 * @param peer peer identity this notification is about
5223 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5225 struct MeshPeerInfo *peer_info;
5226 struct MeshPeerPath *path;
5228 DEBUG_CONN ("Peer connected\n");
5229 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5230 peer_info = peer_get (peer);
5231 if (myid == peer_info->id)
5233 DEBUG_CONN (" (self)\n");
5234 path = path_new (1);
5238 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5239 path = path_new (2);
5240 path->peers[1] = peer_info->id;
5241 GNUNET_PEER_change_rc (peer_info->id, 1);
5242 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5244 path->peers[0] = myid;
5245 GNUNET_PEER_change_rc (myid, 1);
5246 peer_info_add_path (peer_info, path, GNUNET_YES);
5252 * Method called whenever a peer disconnects.
5254 * @param cls closure
5255 * @param peer peer identity this notification is about
5258 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5260 struct MeshPeerInfo *pi;
5261 struct MeshPeerQueue *q;
5262 struct MeshPeerQueue *n;
5264 DEBUG_CONN ("Peer disconnected\n");
5265 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5275 /* TODO try to reroute this traffic instead */
5276 queue_destroy(q, GNUNET_YES);
5279 if (NULL != pi->core_transmit)
5281 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5282 pi->core_transmit = NULL;
5284 peer_remove_path (pi, pi->id, myid);
5287 DEBUG_CONN (" (self)\n");
5289 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5295 * Install server (service) handlers and start listening to clients.
5300 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5301 GNUNET_SERVER_connect_notify (server_handle,
5302 &handle_local_client_connect, NULL);
5303 GNUNET_SERVER_disconnect_notify (server_handle,
5304 &handle_local_client_disconnect, NULL);
5305 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5307 clients_head = NULL;
5308 clients_tail = NULL;
5310 GNUNET_SERVER_resume (server_handle);
5315 * To be called on core init/fail.
5317 * @param cls Closure (config)
5318 * @param server handle to the server for this service
5319 * @param identity the public identity of this peer
5322 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5323 const struct GNUNET_PeerIdentity *identity)
5325 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5329 GNUNET_break (core_handle == server);
5330 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5333 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5334 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5336 GNUNET_i2s (identity));
5337 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5339 GNUNET_i2s (&my_full_id));
5340 GNUNET_CORE_disconnect (core_handle);
5341 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5342 NULL, /* Closure passed to MESH functions */
5343 &core_init, /* Call core_init once connected */
5344 &core_connect, /* Handle connects */
5345 &core_disconnect, /* remove peers on disconnects */
5346 NULL, /* Don't notify about all incoming messages */
5347 GNUNET_NO, /* For header only in notification */
5348 NULL, /* Don't notify about all outbound messages */
5349 GNUNET_NO, /* For header-only out notification */
5350 core_handlers); /* Register these handlers */
5359 /******************************************************************************/
5360 /************************ MAIN FUNCTIONS ****************************/
5361 /******************************************************************************/
5364 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5366 * @param cls closure
5367 * @param key current key code
5368 * @param value value in the hash map
5369 * @return GNUNET_YES if we should continue to iterate,
5373 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5375 struct MeshTunnel *t = value;
5382 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5384 * @param cls closure
5385 * @param key current key code
5386 * @param value value in the hash map
5387 * @return GNUNET_YES if we should continue to iterate,
5391 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5393 struct MeshPeerInfo *p = value;
5394 struct MeshPeerQueue *q;
5395 struct MeshPeerQueue *n;
5403 queue_destroy(q, GNUNET_YES);
5407 peer_info_destroy (p);
5413 * Task run during shutdown.
5419 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5423 if (core_handle != NULL)
5425 GNUNET_CORE_disconnect (core_handle);
5428 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5429 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5430 if (dht_handle != NULL)
5432 GNUNET_DHT_disconnect (dht_handle);
5437 GNUNET_SERVER_notification_context_destroy (nc);
5440 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5442 GNUNET_SCHEDULER_cancel (announce_id_task);
5443 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5450 * Process mesh requests.
5452 * @param cls closure
5453 * @param server the initialized server
5454 * @param c configuration to use
5457 run (void *cls, struct GNUNET_SERVER_Handle *server,
5458 const struct GNUNET_CONFIGURATION_Handle *c)
5461 struct GNUNET_CRYPTO_EccPrivateKey *pk;
5463 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5464 server_handle = server;
5465 GNUNET_SERVER_suspend (server_handle);
5468 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5471 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5473 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5474 "mesh", "peer/privatekey");
5475 GNUNET_SCHEDULER_shutdown ();
5480 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5481 &refresh_path_time))
5483 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5485 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5486 "mesh", "refresh path time");
5487 GNUNET_SCHEDULER_shutdown ();
5492 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5495 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5497 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5498 "mesh", "id announce time");
5499 GNUNET_SCHEDULER_shutdown ();
5504 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5507 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5509 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5510 "mesh", "connect timeout");
5511 GNUNET_SCHEDULER_shutdown ();
5516 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5519 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5521 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5522 "mesh", "max msgs queue");
5523 GNUNET_SCHEDULER_shutdown ();
5528 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5531 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5533 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5534 "mesh", "max tunnels");
5535 GNUNET_SCHEDULER_shutdown ();
5540 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5543 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5545 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5546 "mesh", "default ttl", 64);
5551 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5554 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5555 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5556 "mesh", "max peers", 1000);
5561 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
5568 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5569 "Mesh is running with drop mode enabled. "
5570 "This is NOT a good idea! "
5571 "Remove the DROP_PERCENT option from your configuration.\n");
5575 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5576 &dht_replication_level))
5578 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5580 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5581 "mesh", "dht replication level", 3);
5582 dht_replication_level = 3;
5585 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5586 incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5587 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5588 ports = GNUNET_CONTAINER_multihashmap32_create (32);
5590 dht_handle = GNUNET_DHT_connect (c, 64);
5591 if (NULL == dht_handle)
5595 stats = GNUNET_STATISTICS_create ("mesh", c);
5597 /* Scheduled the task to clean up when shutdown is called */
5598 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5600 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
5601 GNUNET_free (keyfile);
5602 GNUNET_assert (NULL != pk);
5603 my_private_key = pk;
5604 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5605 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5606 &my_full_id.hashPubKey);
5607 myid = GNUNET_PEER_intern (&my_full_id);
5608 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5609 "Mesh for peer [%s] starting\n",
5610 GNUNET_i2s(&my_full_id));
5612 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5613 NULL, /* Closure passed to MESH functions */
5614 &core_init, /* Call core_init once connected */
5615 &core_connect, /* Handle connects */
5616 &core_disconnect, /* remove peers on disconnects */
5617 NULL, /* Don't notify about all incoming messages */
5618 GNUNET_NO, /* For header only in notification */
5619 NULL, /* Don't notify about all outbound messages */
5620 GNUNET_NO, /* For header-only out notification */
5621 core_handlers); /* Register these handlers */
5622 if (NULL == core_handle)
5625 GNUNET_SCHEDULER_shutdown ();
5629 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5630 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5636 * The main function for the mesh service.
5638 * @param argc number of arguments from the command line
5639 * @param argv command line arguments
5640 * @return 0 ok, 1 on error
5643 main (int argc, char *const *argv)
5648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5649 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5651 ret = (GNUNET_OK == r) ? 0 : 1;
5652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");