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;
2177 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2178 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2181 GNUNET_MESH_DEBUG_M2S (type));
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_UNICAST_ACK:
2191 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
2192 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2193 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2195 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2196 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2197 t->force_ack = GNUNET_YES;
2203 /* Check if we need to transmit the ACK */
2205 if (0 && NULL == o &&
2206 t->queue_max > next_fc->queue_n * 4 &&
2207 GMC_is_pid_bigger (prev_fc->last_ack_sent, prev_fc->last_pid_recv) &&
2208 GNUNET_NO == t->force_ack)
2210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
2211 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2212 " t->qmax: %u, t->qn: %u\n",
2213 t->queue_max, next_fc->queue_n);
2214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2215 " t->pid: %u, t->ack: %u\n",
2216 prev_fc->last_pid_recv, prev_fc->last_ack_sent);
2220 /* Ok, ACK might be necessary, what PID to ACK? */
2221 delta = t->queue_max - next_fc->queue_n;
2222 if (NULL != o && GNUNET_YES == t->reliable && NULL != rel->head_sent)
2223 delta_mid = rel->mid_sent - rel->head_sent->mid;
2226 if (0 > delta || (GNUNET_YES == t->reliable &&
2228 (10 < rel->n_sent || 64 <= delta_mid)))
2230 if (NULL != o && delta > 1)
2232 ack = prev_fc->last_pid_recv + delta;
2233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
2234 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2235 " last pid %u, last ack %u, qmax %u, q %u\n",
2236 prev_fc->last_pid_recv, prev_fc->last_ack_sent,
2237 t->queue_max, next_fc->queue_n);
2238 if (ack == prev_fc->last_ack_sent && GNUNET_NO == t->force_ack)
2240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
2244 prev_fc->last_ack_sent = ack;
2246 send_local_ack (t, o, fwd);
2248 send_ack (t, hop, ack);
2251 t->force_ack = GNUNET_NO;
2256 * Modify the mesh message TID from global to local and send to client.
2258 * @param t Tunnel on which to send the message.
2259 * @param msg Message to modify and send.
2260 * @param c Client to send to.
2261 * @param tid Tunnel ID to use (c can be both owner and client).
2264 tunnel_send_client_to_tid (struct MeshTunnel *t,
2265 const struct GNUNET_MESH_Data *msg,
2266 struct MeshClient *c, MESH_TunnelNumber tid)
2268 struct GNUNET_MESH_LocalData *copy;
2269 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
2270 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
2272 if (size < sizeof (struct GNUNET_MessageHeader))
2274 GNUNET_break_op (0);
2282 copy = (struct GNUNET_MESH_LocalData *) cbuf;
2283 memcpy (©[1], &msg[1], size);
2284 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
2285 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
2286 copy->tid = htonl (tid);
2287 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2288 ©->header, GNUNET_NO);
2292 * Modify the unicast message TID from global to local and send to client.
2294 * @param t Tunnel on which to send the message.
2295 * @param msg Message to modify and send.
2296 * @param fwd Forward?
2299 tunnel_send_client_data (struct MeshTunnel *t,
2300 const struct GNUNET_MESH_Data *msg,
2304 tunnel_send_client_to_tid (t, msg, t->client, t->local_tid_dest);
2306 tunnel_send_client_to_tid (t, msg, t->owner, t->local_tid);
2311 * Send up to 64 buffered messages to the client for in order delivery.
2313 * @param t Tunnel on which to empty the message buffer.
2314 * @param c Client to send to.
2315 * @param rel Reliability structure to corresponding peer.
2316 * If rel == t->bck_rel, this is FWD data.
2319 tunnel_send_client_buffered_data (struct MeshTunnel *t, struct MeshClient *c,
2320 struct MeshTunnelReliability *rel)
2323 struct MeshReliableMessage *copy;
2324 struct MeshReliableMessage *next;
2326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n");
2327 for (copy = rel->head_recv; NULL != copy; copy = next)
2330 if (copy->mid == rel->mid_recv)
2332 struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
2334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2335 " have %u! now expecting %u\n",
2336 copy->mid, rel->mid_recv + 1);
2337 tunnel_send_client_data (t, msg, (rel == t->bck_rel));
2339 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2345 " don't have %u, next is %u\n",
2351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n");
2356 * We have received a message out of order, buffer it until we receive
2357 * the missing one and we can feed the rest to the client.
2359 * @param t Tunnel to add to.
2360 * @param msg Message to buffer.
2361 * @param rel Reliability data to the corresponding direction.
2364 tunnel_add_buffered_data (struct MeshTunnel *t,
2365 const struct GNUNET_MESH_Data *msg,
2366 struct MeshTunnelReliability *rel)
2368 struct MeshReliableMessage *copy;
2369 struct MeshReliableMessage *prev;
2373 size = ntohs (msg->header.size);
2374 mid = ntohl (msg->mid);
2375 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data %u\n", mid);
2377 copy = GNUNET_malloc (sizeof (*copy) + size);
2380 memcpy (©[1], msg, size);
2382 // FIXME do something better than O(n), although n < 64...
2383 // FIXME start from the end (most messages are the latest ones)
2384 for (prev = rel->head_recv; NULL != prev; prev = prev->next)
2386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %u\n", prev->mid);
2387 if (GMC_is_pid_bigger (prev->mid, mid))
2389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n");
2390 GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv,
2395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n");
2396 GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy);
2397 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data END\n");
2402 * Destroy a reliable message after it has been acknowledged, either by
2403 * direct mid ACK or bitfield. Updates the appropriate data structures and
2404 * timers and frees all memory.
2406 * @param copy Message that is no longer needed: remote peer got it.
2409 tunnel_free_reliable_message (struct MeshReliableMessage *copy)
2411 struct MeshTunnelReliability *rel;
2412 struct GNUNET_TIME_Relative time;
2415 time = GNUNET_TIME_absolute_get_duration (copy->timestamp);
2416 rel->expected_delay.rel_value *= 7;
2417 rel->expected_delay.rel_value += time.rel_value;
2418 rel->expected_delay.rel_value /= 8;
2420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %u\n", copy->mid);
2421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
2422 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! took %s\n",
2423 GNUNET_STRINGS_relative_time_to_string (time, GNUNET_NO));
2424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n",
2425 GNUNET_STRINGS_relative_time_to_string (rel->expected_delay,
2427 rel->retry_timer = rel->expected_delay;
2428 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2434 * Mark future messages as ACK'd.
2436 * @param t Tunnel whose sent buffer to clean.
2437 * @param msg DataACK message with a bitfield of future ACK'd messages.
2438 * @param rel Reliability data.
2441 tunnel_free_sent_reliable (struct MeshTunnel *t,
2442 const struct GNUNET_MESH_DataACK *msg,
2443 struct MeshTunnelReliability *rel)
2445 struct MeshReliableMessage *copy;
2446 struct MeshReliableMessage *next;
2453 bitfield = msg->futures;
2454 mid = ntohl (msg->mid);
2455 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2456 "free_sent_reliable %u %llX\n",
2458 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2459 " rel %p, head %p\n",
2460 rel, rel->head_sent);
2461 for (i = 0, copy = rel->head_sent;
2462 i < 64 && NULL != copy && 0 != bitfield;
2465 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2466 " trying bit %u (mid %u)\n",
2469 if (0 == (bitfield & mask))
2472 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n");
2473 /* Bit was set, clear the bit from the bitfield */
2476 /* The i-th bit was set. Do we have that copy? */
2477 /* Skip copies with mid < target */
2478 target = mid + i + 1;
2479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %u\n", target);
2480 while (NULL != copy && GMC_is_pid_bigger (target, copy->mid))
2483 /* Did we run out of copies? (previously freed, it's ok) */
2486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n");
2490 /* Did we overshoot the target? (previously freed, it's ok) */
2491 if (GMC_is_pid_bigger (copy->mid, target))
2493 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %u\n", copy->mid);
2497 /* Now copy->mid == target, free it */
2499 tunnel_free_reliable_message (copy);
2502 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n");
2507 * We haven't received an ACK after a certain time: restransmit the message.
2509 * @param cls Closure (MeshReliableMessage with the message to restransmit)
2510 * @param tc TaskContext.
2513 tunnel_retransmit_message (void *cls,
2514 const struct GNUNET_SCHEDULER_TaskContext *tc)
2516 struct MeshTunnelReliability *rel = cls;
2517 struct MeshReliableMessage *copy;
2518 struct MeshFlowControl *fc;
2519 struct MeshPeerQueue *q;
2520 struct MeshPeerInfo *pi;
2521 struct MeshTunnel *t;
2522 struct GNUNET_MESH_Data *payload;
2525 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
2526 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2530 copy = rel->head_sent;
2537 /* Search the message to be retransmitted in the outgoing queue */
2538 payload = (struct GNUNET_MESH_Data *) ©[1];
2539 hop = rel == t->fwd_rel ? t->next_hop : t->prev_hop;
2540 fc = rel == t->fwd_rel ? &t->prev_fc : &t->next_fc;
2541 pi = peer_get_short (hop);
2542 for (q = pi->queue_head; NULL != q; q = q->next)
2544 if (ntohs (payload->header.type) == q->type)
2546 struct GNUNET_MESH_Data *queued_data = q->cls;
2548 if (queued_data->mid == payload->mid)
2553 /* Message not found in the queue */
2556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid);
2558 fc->last_ack_sent++;
2559 fc->last_pid_recv++;
2560 payload->pid = htonl (fc->last_pid_recv);
2561 send_prebuilt_message (&payload->header, hop, t);
2562 GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
2566 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! STILL IN QUEUE %u\n", copy->mid);
2569 rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer);
2570 rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
2571 &tunnel_retransmit_message,
2577 * @brief Re-initiate traffic to this peer if necessary.
2579 * Check if there is traffic queued towards this peer
2580 * and the core transmit handle is NULL (traffic was stalled).
2581 * If so, call core tmt rdy.
2583 * @param peer_id Short ID of peer to which initiate traffic.
2586 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2588 struct MeshPeerInfo *peer;
2589 struct GNUNET_PeerIdentity id;
2590 struct MeshPeerQueue *q;
2593 peer = peer_get_short (peer_id);
2594 if (NULL != peer->core_transmit)
2597 q = queue_get_next (peer);
2600 /* Might br multicast traffic already sent to this particular peer but
2601 * not to other children in this tunnel.
2602 * This way t->queue_n would be > 0 but the queue of this particular peer
2608 GNUNET_PEER_resolve (peer->id, &id);
2609 peer->core_transmit =
2610 GNUNET_CORE_notify_transmit_ready(core_handle,
2613 GNUNET_TIME_UNIT_FOREVER_REL,
2623 * Send a message to all peers and clients in this tunnel that the tunnel
2624 * is no longer valid. If some peer or client should not receive the message,
2625 * should be zero'ed out before calling this function.
2627 * @param t The tunnel whose peers and clients to notify.
2630 tunnel_send_destroy (struct MeshTunnel *t)
2632 struct GNUNET_MESH_TunnelDestroy msg;
2633 struct GNUNET_PeerIdentity id;
2635 msg.header.size = htons (sizeof (msg));
2636 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2637 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2638 msg.tid = htonl (t->id.tid);
2639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2640 " sending tunnel destroy for tunnel: %s [%X]\n",
2641 GNUNET_i2s (&msg.oid), t->id.tid);
2643 if (NULL == t->client && 0 != t->next_hop)
2645 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2646 GNUNET_PEER_resolve (t->next_hop, &id);
2647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2648 " sending forward to %s\n",
2650 send_prebuilt_message (&msg.header, t->next_hop, t);
2652 if (NULL == t->owner && 0 != t->prev_hop)
2654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2655 GNUNET_PEER_resolve (t->prev_hop, &id);
2656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2657 " sending back to %s\n",
2659 send_prebuilt_message (&msg.header, t->prev_hop, t);
2661 if (NULL != t->owner)
2663 send_client_tunnel_destroy (t->owner, t);
2665 if (NULL != t->client)
2667 send_client_tunnel_destroy (t->client, t);
2673 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2675 * @param t Tunnel which to cancel.
2676 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2679 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2681 struct MeshPeerInfo *peer_info;
2682 struct MeshPeerQueue *pq;
2683 struct MeshPeerQueue *next;
2686 return; /* Was local peer, 0'ed in tunnel_destroy_iterator */
2687 peer_info = peer_get_short (neighbor);
2688 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2691 if (pq->tunnel == t)
2693 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2694 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2696 /* Should have been removed on destroy children */
2699 queue_destroy (pq, GNUNET_YES);
2702 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2704 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2705 peer_info->core_transmit = NULL;
2711 * Destroy the tunnel.
2713 * This function does not generate any warning traffic to clients or peers.
2716 * Remove the tunnel from peer_info's and clients' hashmaps.
2717 * Cancel messages belonging to this tunnel queued to neighbors.
2718 * Free any allocated resources linked to the tunnel.
2720 * @param t the tunnel to destroy
2722 * @return GNUNET_OK on success
2725 tunnel_destroy (struct MeshTunnel *t)
2727 struct MeshClient *c;
2728 struct GNUNET_HashCode hash;
2738 struct GNUNET_PeerIdentity id;
2740 GNUNET_PEER_resolve (t->id.oid, &id);
2741 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2742 GNUNET_i2s (&id), t->id.tid);
2744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2748 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2749 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2758 GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels, t->local_tid, t))
2765 if (NULL != t->client)
2769 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
2770 t->local_tid_dest, t))
2776 GNUNET_CONTAINER_multihashmap32_remove (incoming_tunnels,
2777 t->local_tid_dest, t))
2784 if (0 != t->prev_hop)
2786 peer_cancel_queues (t->prev_hop, t);
2787 GNUNET_PEER_change_rc (t->prev_hop, -1);
2789 if (0 != t->next_hop)
2791 peer_cancel_queues (t->next_hop, t);
2792 GNUNET_PEER_change_rc (t->next_hop, -1);
2795 peer_info_remove_tunnel (peer_get_short (t->dest), t);
2798 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2799 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2802 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2803 path_destroy (t->path);
2809 * Tunnel is empty: destroy it.
2811 * Notifies all participants (peers, cleints) about the destruction.
2813 * @param t Tunnel to destroy.
2816 tunnel_destroy_empty (struct MeshTunnel *t)
2820 struct GNUNET_PeerIdentity id;
2822 GNUNET_PEER_resolve (t->id.oid, &id);
2823 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2824 "executing destruction of empty tunnel %s [%X]\n",
2825 GNUNET_i2s (&id), t->id.tid);
2829 if (GNUNET_NO == t->destroy)
2830 tunnel_send_destroy (t);
2831 if (0 == t->pending_messages)
2834 t->destroy = GNUNET_YES;
2838 * Initialize a Flow Control structure to the initial state.
2840 * @param fc Flow Control structure to initialize.
2843 fc_init (struct MeshFlowControl *fc)
2845 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2846 fc->last_pid_recv = (uint32_t) -1;
2847 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
2848 fc->last_ack_recv = (uint32_t) -1;
2849 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2850 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2855 * Create a new tunnel
2857 * @param owner Who is the owner of the tunnel (short ID).
2858 * @param tid Tunnel Number of the tunnel.
2859 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2860 * @param local Tunnel Number for the tunnel, for the client point of view.
2862 * @return A new initialized tunnel. NULL on error.
2864 static struct MeshTunnel *
2865 tunnel_new (GNUNET_PEER_Id owner,
2866 MESH_TunnelNumber tid,
2867 struct MeshClient *client,
2868 MESH_TunnelNumber local)
2870 struct MeshTunnel *t;
2871 struct GNUNET_HashCode hash;
2873 if (n_tunnels >= max_tunnels && NULL == client)
2876 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2879 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2881 fc_init (&t->next_fc);
2882 fc_init (&t->prev_fc);
2883 t->local_tid = local;
2885 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2887 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2889 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2890 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2897 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2905 GNUNET_CONTAINER_multihashmap32_put (client->own_tunnels,
2907 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2911 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2921 * Set options in a tunnel, extracted from a bit flag field
2923 * @param t Tunnel to set options to.
2924 * @param options Bit array in host byte order.
2927 tunnel_set_options (struct MeshTunnel *t, uint32_t options)
2929 t->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
2930 GNUNET_YES : GNUNET_NO;
2931 t->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
2932 GNUNET_YES : GNUNET_NO;
2937 * Iterator for deleting each tunnel whose client endpoint disconnected.
2939 * @param cls Closure (client that has disconnected).
2940 * @param key The local tunnel id (used to access the hashmap).
2941 * @param value The value stored at the key (tunnel to destroy).
2943 * @return GNUNET_OK, keep iterating.
2946 tunnel_destroy_iterator (void *cls,
2950 struct MeshTunnel *t = value;
2951 struct MeshClient *c = cls;
2953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2954 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
2955 t->local_tid, t->local_tid_dest, c->id);
2956 client_delete_tunnel (c, t);
2959 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
2961 if (0 != t->next_hop) { /* destroy could come before a path is used */
2962 GNUNET_PEER_change_rc (t->next_hop, -1);
2968 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
2970 if (0 != t->prev_hop) { /* destroy could come before a path is used */
2971 GNUNET_PEER_change_rc (t->prev_hop, -1);
2976 tunnel_destroy_empty (t);
2983 * Timeout function, destroys tunnel if called
2985 * @param cls Closure (tunnel to destroy).
2986 * @param tc TaskContext
2989 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2991 struct MeshTunnel *t = cls;
2992 struct GNUNET_PeerIdentity id;
2994 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2995 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2997 GNUNET_PEER_resolve(t->id.oid, &id);
2998 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
2999 "Tunnel %s [%X] timed out. Destroying.\n",
3000 GNUNET_i2s(&id), t->id.tid);
3001 if (NULL != t->client)
3002 send_client_tunnel_destroy (t->client, t);
3003 tunnel_destroy (t); /* Do not notify other */
3008 * Resets the tunnel timeout. Starts it if no timeout was running.
3010 * @param t Tunnel whose timeout to reset.
3011 * @param fwd Is this forward?
3013 * TODO use heap to improve efficiency of scheduler.
3014 * FIXME use fwd, keep 2 timers
3017 tunnel_reset_timeout (struct MeshTunnel *t, int fwd)
3019 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
3021 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
3022 GNUNET_SCHEDULER_cancel (t->maintenance_task);
3023 t->maintenance_task =
3024 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3025 (refresh_path_time, 4), &tunnel_timeout, t);
3029 /******************************************************************************/
3030 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3031 /******************************************************************************/
3034 * Function to send a create path packet to a peer.
3036 * @param cls closure
3037 * @param size number of bytes available in buf
3038 * @param buf where the callee should write the message
3039 * @return number of bytes written to buf
3042 send_core_path_create (void *cls, size_t size, void *buf)
3044 struct MeshTunnel *t = cls;
3045 struct GNUNET_MESH_CreateTunnel *msg;
3046 struct GNUNET_PeerIdentity *peer_ptr;
3047 struct MeshPeerPath *p = t->path;
3052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
3054 sizeof (struct GNUNET_MESH_CreateTunnel) +
3055 p->length * sizeof (struct GNUNET_PeerIdentity);
3057 if (size < size_needed || NULL == buf)
3062 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
3063 msg->header.size = htons (size_needed);
3064 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
3065 msg->tid = ntohl (t->id.tid);
3068 if (GNUNET_YES == t->nobuffer)
3069 opt |= GNUNET_MESH_OPTION_NOBUFFER;
3070 if (GNUNET_YES == t->reliable)
3071 opt |= GNUNET_MESH_OPTION_RELIABLE;
3072 msg->opt = htonl (opt);
3073 msg->port = htonl (t->port);
3075 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
3076 for (i = 0; i < p->length; i++)
3078 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
3081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3082 "CREATE PATH (%u bytes long) sent!\n", size_needed);
3088 * Creates a path ack message in buf and frees all unused resources.
3090 * @param cls closure (MeshTransmissionDescriptor)
3091 * @param size number of bytes available in buf
3092 * @param buf where the callee should write the message
3093 * @return number of bytes written to buf
3096 send_core_path_ack (void *cls, size_t size, void *buf)
3098 struct MeshTunnel *t = cls;
3099 struct GNUNET_MESH_PathACK *msg = buf;
3101 GNUNET_assert (NULL != t);
3102 if (sizeof (struct GNUNET_MESH_PathACK) > size)
3107 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
3108 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
3109 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3110 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
3111 msg->tid = htonl (t->id.tid);
3112 msg->peer_id = my_full_id;
3113 msg->ack = htonl (t->prev_fc.last_ack_sent);
3115 /* TODO add signature */
3117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
3118 return sizeof (struct GNUNET_MESH_PathACK);
3123 * Free a transmission that was already queued with all resources
3124 * associated to the request.
3126 * @param queue Queue handler to cancel.
3127 * @param clear_cls Is it necessary to free associated cls?
3130 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3132 struct MeshFlowControl *fc;
3134 if (GNUNET_YES == clear_cls)
3136 switch (queue->type)
3138 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3139 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3140 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3142 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3143 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3144 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3145 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3146 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
3147 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3148 " prebuilt message\n");
3149 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3151 GNUNET_MESH_DEBUG_M2S (queue->type));
3153 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3158 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3159 " type %s unknown!\n",
3160 GNUNET_MESH_DEBUG_M2S (queue->type));
3162 GNUNET_free_non_null (queue->cls);
3164 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3165 queue->peer->queue_tail,
3168 /* Delete from appropriate fc in the tunnel */
3169 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type ||
3170 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type )
3172 if (queue->peer->id == queue->tunnel->prev_hop)
3173 fc = &queue->tunnel->prev_fc;
3174 else if (queue->peer->id == queue->tunnel->next_hop)
3175 fc = &queue->tunnel->next_fc;
3179 GNUNET_free (queue);
3184 GNUNET_free (queue);
3189 * @brief Get the next transmittable message from the queue.
3191 * This will be the head, except in the case of being a data packet
3192 * not allowed by the destination peer.
3194 * @param peer Destination peer.
3196 * @return The next viable MeshPeerQueue element to send to that peer.
3197 * NULL when there are no transmittable messages.
3199 struct MeshPeerQueue *
3200 queue_get_next (const struct MeshPeerInfo *peer)
3202 struct MeshPeerQueue *q;
3204 struct GNUNET_MESH_Data *dmsg;
3205 struct MeshTunnel* t;
3209 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
3210 for (q = peer->queue_head; NULL != q; q = q->next)
3213 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3215 GNUNET_MESH_DEBUG_M2S (q->type));
3216 dmsg = (struct GNUNET_MESH_Data *) q->cls;
3217 pid = ntohl (dmsg->pid);
3220 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3221 ack = t->next_fc.last_ack_recv;
3223 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3224 ack = t->prev_fc.last_ack_recv;
3227 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3232 "* ACK: %u, PID: %u, MID: %u\n",
3233 ack, pid, ntohl (dmsg->mid));
3234 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
3236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3242 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3247 "* nothing found\n");
3253 queue_send (void *cls, size_t size, void *buf)
3255 struct MeshPeerInfo *peer = cls;
3256 struct GNUNET_MessageHeader *msg;
3257 struct MeshPeerQueue *queue;
3258 struct MeshTunnel *t;
3259 struct GNUNET_PeerIdentity dst_id;
3260 struct MeshFlowControl *fc;
3265 peer->core_transmit = NULL;
3267 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
3268 queue = queue_get_next (peer);
3270 /* Queue has no internal mesh traffic nor sendable payload */
3273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
3274 if (NULL == peer->queue_head)
3275 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
3278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
3280 GNUNET_PEER_resolve (peer->id, &dst_id);
3281 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3283 GNUNET_i2s (&dst_id));
3284 /* Check if buffer size is enough for the message */
3285 if (queue->size > size)
3287 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3288 "* not enough room, reissue\n");
3289 peer->core_transmit =
3290 GNUNET_CORE_notify_transmit_ready (core_handle,
3293 GNUNET_TIME_UNIT_FOREVER_REL,
3300 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
3303 GNUNET_assert (0 < t->pending_messages);
3304 t->pending_messages--;
3308 switch (queue->type)
3311 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3312 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3313 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3314 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3315 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3316 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3317 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3318 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
3319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3321 GNUNET_MESH_DEBUG_M2S (queue->type));
3323 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3324 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3325 data_size = send_core_data_raw (queue->cls, size, buf);
3326 msg = (struct GNUNET_MessageHeader *) buf;
3327 type = ntohs (msg->type);
3329 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
3331 data_size = send_core_path_create (queue->cls, size, buf);
3333 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3334 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
3335 data_size = send_core_path_ack (queue->cls, size, buf);
3339 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3340 "* type unknown: %u\n",
3345 if (0 < drop_percent &&
3346 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
3348 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3349 "Dropping message of type %s\n",
3350 GNUNET_MESH_DEBUG_M2S(queue->type));
3353 /* Free queue, but cls was freed by send_core_* */
3354 queue_destroy (queue, GNUNET_NO);
3356 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
3357 pid = ((struct GNUNET_MESH_Data *) buf)->pid;
3361 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3362 t->next_fc.last_pid_sent = pid;
3363 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES);
3364 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3366 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3368 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3369 t->prev_fc.last_pid_sent = pid;
3370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3372 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3373 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO);
3379 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3381 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
3385 /* If more data in queue, send next */
3386 queue = queue_get_next (peer);
3389 struct GNUNET_PeerIdentity id;
3391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
3392 GNUNET_PEER_resolve (peer->id, &id);
3393 peer->core_transmit =
3394 GNUNET_CORE_notify_transmit_ready(core_handle,
3397 GNUNET_TIME_UNIT_FOREVER_REL,
3403 if (NULL != peer->queue_head)
3405 if (peer->id == t->next_hop)
3407 else if (peer->id == t->prev_hop)
3414 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task && fc->queue_n > 0)
3416 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3417 "* %s starting poll timeout\n",
3418 GNUNET_i2s (&my_full_id));
3420 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3424 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
3430 * @brief Queue and pass message to core when possible.
3432 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3433 * accounts for it. In case the queue is full, the message is dropped and
3436 * Otherwise, message is treated as internal and allowed to go regardless of
3439 * @param cls Closure (@c type dependant). It will be used by queue_send to
3440 * build the message to be sent if not already prebuilt.
3441 * @param type Type of the message, 0 for a raw message.
3442 * @param size Size of the message.
3443 * @param dst Neighbor to send message to.
3444 * @param t Tunnel this message belongs to.
3447 queue_add (void *cls, uint16_t type, size_t size,
3448 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3450 struct MeshPeerQueue *queue;
3451 struct GNUNET_PeerIdentity id;
3452 struct MeshFlowControl *fc;
3456 priority = GNUNET_NO;
3457 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3461 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3467 if (fc->queue_n >= t->queue_max)
3469 /* If this isn't a retransmission, drop the message */
3470 if (GNUNET_NO == t->reliable ||
3471 (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) ||
3472 (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type))
3474 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
3477 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3478 "queue full: %u/%u\n",
3479 fc->queue_n, t->queue_max);
3480 return; /* Drop this message */
3482 priority = GNUNET_YES;
3486 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3492 if (GNUNET_YES == priority)
3494 struct GNUNET_MESH_Data *d;
3498 GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue);
3499 d = (struct GNUNET_MESH_Data *) queue->cls;
3501 for (queue = dst->queue_tail; NULL != queue; queue = queue->prev)
3503 if (queue->type != type)
3505 d = (struct GNUNET_MESH_Data *) queue->cls;
3512 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3513 if (NULL == dst->core_transmit)
3515 GNUNET_PEER_resolve (dst->id, &id);
3516 dst->core_transmit =
3517 GNUNET_CORE_notify_transmit_ready (core_handle,
3520 GNUNET_TIME_UNIT_FOREVER_REL,
3526 t->pending_messages++;
3530 /******************************************************************************/
3531 /******************** MESH NETWORK HANDLERS **************************/
3532 /******************************************************************************/
3536 * Core handler for path creation
3538 * @param cls closure
3539 * @param message message
3540 * @param peer peer identity this notification is about
3542 * @return GNUNET_OK to keep the connection open,
3543 * GNUNET_SYSERR to close it (signal serious error)
3546 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3547 const struct GNUNET_MessageHeader *message)
3549 unsigned int own_pos;
3552 MESH_TunnelNumber tid;
3553 struct GNUNET_MESH_CreateTunnel *msg;
3554 struct GNUNET_PeerIdentity *pi;
3555 struct MeshPeerPath *path;
3556 struct MeshPeerInfo *dest_peer_info;
3557 struct MeshPeerInfo *orig_peer_info;
3558 struct MeshTunnel *t;
3560 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3561 "Received a path create msg [%s]\n",
3562 GNUNET_i2s (&my_full_id));
3563 size = ntohs (message->size);
3564 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3566 GNUNET_break_op (0);
3570 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3571 if (size % sizeof (struct GNUNET_PeerIdentity))
3573 GNUNET_break_op (0);
3576 size /= sizeof (struct GNUNET_PeerIdentity);
3579 GNUNET_break_op (0);
3582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3583 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3585 tid = ntohl (msg->tid);
3586 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3588 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
3589 t = tunnel_get (pi, tid);
3590 if (NULL == t) /* might be a local tunnel */
3594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3595 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3601 t->port = ntohl (msg->port);
3602 opt = ntohl (msg->opt);
3603 if (0 != (opt & GNUNET_MESH_OPTION_NOBUFFER))
3605 t->nobuffer = GNUNET_YES;
3608 if (0 != (opt & GNUNET_MESH_OPTION_RELIABLE))
3610 t->reliable = GNUNET_YES;
3612 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3614 tunnel_reset_timeout (t, GNUNET_YES); // FIXME
3616 t->state = MESH_TUNNEL_WAITING;
3618 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3619 if (NULL == dest_peer_info)
3621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3622 " Creating PeerInfo for destination.\n");
3623 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3624 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3625 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3627 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3629 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3630 if (NULL == orig_peer_info)
3632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3633 " Creating PeerInfo for origin.\n");
3634 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3635 orig_peer_info->id = GNUNET_PEER_intern (pi);
3636 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3637 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3640 path = path_new (size);
3642 for (i = 0; i < size; i++)
3644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3645 GNUNET_i2s (&pi[i]));
3646 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3647 if (path->peers[i] == myid)
3650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3651 if (own_pos == 0 && path->peers[own_pos] != myid)
3653 /* create path: self not found in path through self */
3654 GNUNET_break_op (0);
3655 path_destroy (path);
3659 path_add_to_peers (path, GNUNET_NO);
3660 tunnel_use_path (t, path);
3662 peer_info_add_tunnel (dest_peer_info, t);
3664 if (own_pos == size - 1)
3666 struct MeshClient *c;
3668 /* Find target client */
3669 c = GNUNET_CONTAINER_multihashmap32_get (ports, t->port);
3672 /* TODO send reject */
3676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3677 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3679 /* Assign local tid */
3680 while (NULL != tunnel_get_incoming (next_local_tid))
3681 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3682 t->local_tid_dest = next_local_tid++;
3683 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3685 if (GNUNET_YES == t->reliable)
3687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
3688 t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
3690 t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
3693 tunnel_add_client (t, c);
3694 send_client_tunnel_create (t);
3699 struct MeshPeerPath *path2;
3701 t->next_hop = path->peers[own_pos + 1];
3702 GNUNET_PEER_change_rc(t->next_hop, 1);
3704 /* It's for somebody else! Retransmit. */
3705 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3706 path2 = path_duplicate (path);
3707 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3708 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3709 send_create_path (t);
3717 * Core handler for path ACKs
3719 * @param cls closure
3720 * @param message message
3721 * @param peer peer identity this notification is about
3723 * @return GNUNET_OK to keep the connection open,
3724 * GNUNET_SYSERR to close it (signal serious error)
3727 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3728 const struct GNUNET_MessageHeader *message)
3730 struct GNUNET_MESH_PathACK *msg;
3731 struct MeshPeerInfo *peer_info;
3732 struct MeshPeerPath *p;
3733 struct MeshTunnel *t;
3735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3736 GNUNET_i2s (&my_full_id));
3737 msg = (struct GNUNET_MESH_PathACK *) message;
3738 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3741 /* TODO notify that we don't know the tunnel */
3742 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3743 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3744 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3748 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3750 peer_info = peer_get (&msg->peer_id);
3751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3752 GNUNET_i2s (&msg->peer_id));
3753 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3756 /* Add path to peers? */
3760 path_add_to_peers (p, GNUNET_YES);
3766 t->state = MESH_TUNNEL_READY;
3767 t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0;
3768 t->prev_fc.last_ack_sent = ntohl (msg->ack);
3770 /* Message for us? */
3771 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3773 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3774 if (NULL == t->owner)
3776 GNUNET_break_op (0);
3779 if (NULL != peer_info->dhtget)
3781 GNUNET_DHT_get_stop (peer_info->dhtget);
3782 peer_info->dhtget = NULL;
3784 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_YES);
3785 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_NO);
3789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3790 " not for us, retransmitting...\n");
3791 peer_info = peer_get (&msg->oid);
3792 send_prebuilt_message (message, t->prev_hop, t);
3798 * Core handler for notifications of broken paths
3800 * @param cls closure
3801 * @param message message
3802 * @param peer peer identity this notification is about
3804 * @return GNUNET_OK to keep the connection open,
3805 * GNUNET_SYSERR to close it (signal serious error)
3808 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3809 const struct GNUNET_MessageHeader *message)
3811 struct GNUNET_MESH_PathBroken *msg;
3812 struct MeshTunnel *t;
3814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3815 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3816 msg = (struct GNUNET_MESH_PathBroken *) message;
3817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3818 GNUNET_i2s (&msg->peer1));
3819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3820 GNUNET_i2s (&msg->peer2));
3821 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3824 GNUNET_break_op (0);
3827 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3828 GNUNET_PEER_search (&msg->peer2));
3835 * Core handler for tunnel destruction
3837 * @param cls closure
3838 * @param message message
3839 * @param peer peer identity this notification is about
3841 * @return GNUNET_OK to keep the connection open,
3842 * GNUNET_SYSERR to close it (signal serious error)
3845 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3846 const struct GNUNET_MessageHeader *message)
3848 struct GNUNET_MESH_TunnelDestroy *msg;
3849 struct MeshTunnel *t;
3851 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3853 "Got a TUNNEL DESTROY packet from %s\n",
3855 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3856 " for tunnel %s [%u]\n",
3857 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3858 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3861 /* Probably already got the message from another path,
3862 * destroyed the tunnel and retransmitted to children.
3865 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3869 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3871 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3872 t->local_tid, t->local_tid_dest);
3874 if (GNUNET_PEER_search (peer) == t->prev_hop)
3876 // TODO check owner's signature
3877 // TODO add owner's signatue to tunnel for retransmission
3878 peer_cancel_queues (t->prev_hop, t);
3879 GNUNET_PEER_change_rc (t->prev_hop, -1);
3882 else if (GNUNET_PEER_search (peer) == t->next_hop)
3884 // TODO check dest's signature
3885 // TODO add dest's signatue to tunnel for retransmission
3886 peer_cancel_queues (t->next_hop, t);
3887 GNUNET_PEER_change_rc (t->next_hop, -1);
3892 GNUNET_break_op (0);
3893 // TODO check both owner AND destination's signature to see which matches
3894 // TODO restransmit in appropriate direction
3897 tunnel_destroy_empty (t);
3899 // TODO: add timeout to destroy the tunnel anyway
3905 * Generic handler for mesh network payload traffic.
3907 * @param peer Peer identity this notification is about.
3908 * @param message Data message.
3909 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
3911 * @return GNUNET_OK to keep the connection open,
3912 * GNUNET_SYSERR to close it (signal serious error)
3915 handle_mesh_data (const struct GNUNET_PeerIdentity *peer,
3916 const struct GNUNET_MessageHeader *message,
3919 struct GNUNET_MESH_Data *msg;
3920 struct MeshFlowControl *fc;
3921 struct MeshTunnelReliability *rel;
3922 struct MeshTunnel *t;
3923 struct MeshClient *c;
3929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
3930 GNUNET_MESH_DEBUG_M2S (ntohs (message->type)),
3933 size = ntohs (message->size);
3935 sizeof (struct GNUNET_MESH_Data) +
3936 sizeof (struct GNUNET_MessageHeader))
3941 msg = (struct GNUNET_MESH_Data *) message;
3942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
3943 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3945 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3948 /* TODO notify back: we don't know this tunnel */
3949 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3950 GNUNET_break_op (0);
3954 /* Initialize FWD/BCK data */
3955 pid = ntohl (msg->pid);
3956 fc = fwd ? &t->prev_fc : &t->next_fc;
3957 c = fwd ? t->client : t->owner;
3958 rel = fwd ? t->bck_rel : t->fwd_rel;
3959 hop = fwd ? t->next_hop : t->prev_hop;
3960 if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
3962 GNUNET_STATISTICS_update (stats, "# unsolicited data", 1, GNUNET_NO);
3963 GNUNET_break_op (0);
3964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3965 "Received PID %u, (prev %u), ACK %u\n",
3966 pid, fc->last_pid_recv, fc->last_ack_sent);
3970 tunnel_reset_timeout (t, fwd);
3973 /* TODO signature verification */
3974 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us! sending to client\n");
3975 GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
3976 if (GMC_is_pid_bigger (pid, fc->last_pid_recv))
3980 mid = ntohl (msg->mid);
3981 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3982 " pid %u (mid %u) not seen yet\n", pid, mid);
3983 fc->last_pid_recv = pid;
3985 if (GNUNET_NO == t->reliable ||
3986 ( !GMC_is_pid_bigger (rel->mid_recv, mid) &&
3987 GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) )
3989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3990 "!!! RECV %u\n", ntohl (msg->mid));
3991 if (GNUNET_YES == t->reliable)
3993 /* Is this the exact next expected messasge? */
3994 if (mid == rel->mid_recv)
3996 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
3998 tunnel_send_client_data (t, msg, fwd);
3999 tunnel_send_client_buffered_data (t, c, rel);
4003 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
4004 tunnel_add_buffered_data (t, msg, rel);
4007 else /* Tunnel unreliable, send to clients directly */
4009 tunnel_send_client_data (t, msg, fwd);
4014 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4015 " MID %u not expected (%u - %u), dropping!\n",
4016 ntohl (msg->mid), rel->mid_recv, rel->mid_recv + 64);
4021 // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
4022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4023 " Pid %u not expected (%u+), dropping!\n",
4024 pid, fc->last_pid_recv + 1);
4026 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, fwd);
4029 fc->last_pid_recv = pid;
4035 ttl = ntohl (msg->ttl);
4036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4039 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4040 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4041 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, fwd);
4047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
4048 send_prebuilt_message (message, hop, t);
4049 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4056 * Core handler for mesh network traffic going from the origin to a peer
4058 * @param cls Closure (unused).
4059 * @param message Message received.
4060 * @param peer Peer who sent the message.
4062 * @return GNUNET_OK to keep the connection open,
4063 * GNUNET_SYSERR to close it (signal serious error)
4066 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4067 const struct GNUNET_MessageHeader *message)
4069 return handle_mesh_data (peer, message, GNUNET_YES);
4073 * Core handler for mesh network traffic towards the owner of a tunnel.
4075 * @param cls Closure (unused).
4076 * @param message Message received.
4077 * @param peer Peer who sent the message.
4079 * @return GNUNET_OK to keep the connection open,
4080 * GNUNET_SYSERR to close it (signal serious error)
4083 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4084 const struct GNUNET_MessageHeader *message)
4086 return handle_mesh_data (peer, message, GNUNET_NO);
4091 * Core handler for mesh network traffic end-to-end ACKs.
4093 * @param cls Closure.
4094 * @param message Message.
4095 * @param peer Peer identity this notification is about.
4097 * @return GNUNET_OK to keep the connection open,
4098 * GNUNET_SYSERR to close it (signal serious error)
4101 handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4102 const struct GNUNET_MessageHeader *message)
4104 struct GNUNET_MESH_DataACK *msg;
4105 struct MeshTunnelReliability *rel;
4106 struct MeshReliableMessage *copy;
4107 struct MeshReliableMessage *next;
4108 struct MeshTunnel *t;
4114 type = ntohs (message->type);
4115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message from %s!\n",
4116 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4117 msg = (struct GNUNET_MESH_DataACK *) message;
4119 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4122 /* TODO notify that we dont know this tunnel (whom)? */
4123 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4126 ack = ntohl (msg->mid);
4127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4129 /* Is this a forward or backward ACK? */
4130 id = GNUNET_PEER_search (peer);
4131 if (t->next_hop == id && GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type)
4133 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4134 if (NULL == t->owner)
4136 send_prebuilt_message (message, t->prev_hop, t);
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);
4153 GNUNET_break_op (0);
4157 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %u\n", ack);
4158 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
4160 if (GMC_is_pid_bigger (copy->mid, ack))
4162 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
4163 tunnel_free_sent_reliable (t, msg, rel);
4167 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
4169 tunnel_free_reliable_message (copy);
4171 /* Once buffers have been free'd, send ACK */
4172 tunnel_send_ack (t, type, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type);
4174 /* If some message was free'd, update the retransmission delay*/
4175 if (GNUNET_YES == work)
4177 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
4179 GNUNET_SCHEDULER_cancel (rel->retry_task);
4180 if (NULL == rel->head_sent)
4182 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
4186 struct GNUNET_TIME_Absolute new_target;
4187 struct GNUNET_TIME_Relative delay;
4189 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
4190 MESH_RETRANSMIT_MARGIN);
4191 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
4193 delay = GNUNET_TIME_absolute_get_remaining (new_target);
4195 GNUNET_SCHEDULER_add_delayed (delay,
4196 &tunnel_retransmit_message,
4207 * Core handler for mesh network traffic point-to-point acks.
4209 * @param cls closure
4210 * @param message message
4211 * @param peer peer identity this notification is about
4213 * @return GNUNET_OK to keep the connection open,
4214 * GNUNET_SYSERR to close it (signal serious error)
4217 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4218 const struct GNUNET_MessageHeader *message)
4220 struct GNUNET_MESH_ACK *msg;
4221 struct MeshTunnel *t;
4222 struct MeshFlowControl *fc;
4226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4228 msg = (struct GNUNET_MESH_ACK *) message;
4230 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4234 /* TODO notify that we dont know this tunnel (whom)? */
4235 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4238 ack = ntohl (msg->pid);
4239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4241 /* Is this a forward or backward ACK? */
4242 id = GNUNET_PEER_search (peer);
4243 if (t->next_hop == id)
4245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4248 else if (t->prev_hop == id)
4250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4255 GNUNET_break_op (0);
4259 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
4260 GMC_is_pid_bigger (ack, fc->last_ack_recv))
4262 GNUNET_SCHEDULER_cancel (fc->poll_task);
4263 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4264 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4266 fc->last_ack_recv = ack;
4267 peer_unlock_queue (id);
4269 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, t->next_hop == id);
4276 * Core handler for mesh network traffic point-to-point ack polls.
4278 * @param cls closure
4279 * @param message message
4280 * @param peer peer identity this notification is about
4282 * @return GNUNET_OK to keep the connection open,
4283 * GNUNET_SYSERR to close it (signal serious error)
4286 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4287 const struct GNUNET_MessageHeader *message)
4289 struct GNUNET_MESH_Poll *msg;
4290 struct MeshTunnel *t;
4291 struct MeshFlowControl *fc;
4296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
4299 msg = (struct GNUNET_MESH_Poll *) message;
4301 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4305 /* TODO notify that we dont know this tunnel (whom)? */
4306 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4307 GNUNET_break_op (0);
4311 /* Is this a forward or backward ACK? */
4312 id = GNUNET_PEER_search(peer);
4313 pid = ntohl (msg->pid);
4314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid);
4315 if (t->next_hop == id)
4317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", t->next_fc.last_pid_recv);
4320 old = fc->last_pid_recv;
4321 fc->last_pid_recv = pid;
4322 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, GNUNET_NO);
4324 else if (t->prev_hop == id)
4326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4327 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", t->prev_fc.last_pid_recv);
4329 old = fc->last_pid_recv;
4330 fc->last_pid_recv = pid;
4331 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, GNUNET_YES);
4336 if (GNUNET_YES == t->reliable)
4337 fc->last_pid_recv = old;
4344 * Core handler for mesh keepalives.
4346 * @param cls closure
4347 * @param message message
4348 * @param peer peer identity this notification is about
4349 * @return GNUNET_OK to keep the connection open,
4350 * GNUNET_SYSERR to close it (signal serious error)
4352 * TODO: Check who we got this from, to validate route.
4355 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4356 const struct GNUNET_MessageHeader *message)
4358 struct GNUNET_MESH_TunnelKeepAlive *msg;
4359 struct MeshTunnel *t;
4361 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4364 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4365 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4369 /* TODO notify that we dont know that tunnel */
4370 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4375 tunnel_reset_timeout (t, GNUNET_YES); // FIXME
4376 if (NULL != t->client || 0 == t->next_hop || myid == t->next_hop)
4379 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4380 send_prebuilt_message (message, t->next_hop, t);
4387 * Functions to handle messages from core
4389 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4390 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4391 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4392 sizeof (struct GNUNET_MESH_PathBroken)},
4393 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4394 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4395 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4396 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4397 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK,
4398 sizeof (struct GNUNET_MESH_DataACK)},
4399 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK,
4400 sizeof (struct GNUNET_MESH_DataACK)},
4401 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
4402 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4403 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4404 sizeof (struct GNUNET_MESH_ACK)},
4405 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4406 sizeof (struct GNUNET_MESH_Poll)},
4407 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4408 sizeof (struct GNUNET_MESH_PathACK)},
4414 /******************************************************************************/
4415 /**************** MESH LOCAL HANDLER HELPERS ***********************/
4416 /******************************************************************************/
4421 * notify_client_connection_failure: notify a client that the connection to the
4422 * requested remote peer is not possible (for instance, no route found)
4423 * Function called when the socket is ready to queue more data. "buf" will be
4424 * NULL and "size" zero if the socket was closed for writing in the meantime.
4426 * @param cls closure
4427 * @param size number of bytes available in buf
4428 * @param buf where the callee should write the message
4429 * @return number of bytes written to buf
4432 notify_client_connection_failure (void *cls, size_t size, void *buf)
4435 struct MeshPeerInfo *peer_info;
4436 struct GNUNET_MESH_PeerControl *msg;
4437 struct GNUNET_PeerIdentity id;
4439 if (0 == size && NULL == buf)
4441 // TODO retry? cancel?
4445 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
4446 peer_info = (struct MeshPeerInfo *) cls;
4447 msg = (struct GNUNET_MESH_PeerControl *) buf;
4448 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
4449 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
4450 // msg->tunnel_id = htonl(peer_info->t->tid);
4451 GNUNET_PEER_resolve (peer_info->id, &id);
4452 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
4460 * Send keepalive packets for a tunnel.
4462 * @param cls Closure (tunnel for which to send the keepalive).
4463 * @param tc Notification context.
4465 * FIXME: add a refresh reset in case of normal unicast traffic is doing the job
4468 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4470 struct MeshTunnel *t = cls;
4471 struct GNUNET_MESH_TunnelKeepAlive *msg;
4472 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
4475 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
4476 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
4477 NULL == t->owner || 0 == t->local_tid)
4482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4483 "sending keepalive for tunnel %d\n", t->id.tid);
4485 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
4486 msg->header.size = htons (size);
4487 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
4488 msg->oid = my_full_id;
4489 msg->tid = htonl (t->id.tid);
4490 send_prebuilt_message (&msg->header, t->next_hop, t);
4492 t->maintenance_task =
4493 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
4498 * Function to process paths received for a new peer addition. The recorded
4499 * paths form the initial tunnel, which can be optimized later.
4500 * Called on each result obtained for the DHT search.
4502 * @param cls closure
4503 * @param exp when will this value expire
4504 * @param key key of the result
4505 * @param get_path path of the get request
4506 * @param get_path_length lenght of get_path
4507 * @param put_path path of the put request
4508 * @param put_path_length length of the put_path
4509 * @param type type of the result
4510 * @param size number of bytes in data
4511 * @param data pointer to the result data
4514 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4515 const struct GNUNET_HashCode * key,
4516 const struct GNUNET_PeerIdentity *get_path,
4517 unsigned int get_path_length,
4518 const struct GNUNET_PeerIdentity *put_path,
4519 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4520 size_t size, const void *data)
4522 struct MeshPeerInfo *peer = cls;
4523 struct MeshPeerPath *p;
4524 struct GNUNET_PeerIdentity pi;
4527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4528 GNUNET_PEER_resolve (peer->id, &pi);
4529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4531 p = path_build_from_dht (get_path, get_path_length,
4532 put_path, put_path_length);
4533 path_add_to_peers (p, GNUNET_NO);
4535 for (i = 0; i < peer->ntunnels; i++)
4537 struct GNUNET_PeerIdentity id;
4539 GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id);
4540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n",
4541 GNUNET_i2s (&id), peer->tunnels[i]->id.tid,
4542 peer->tunnels[i]->local_tid,
4543 peer->tunnels[i]->local_tid_dest);
4544 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
4546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
4547 peer_connect (peer, peer->tunnels[i]);
4555 /******************************************************************************/
4556 /********************* MESH LOCAL HANDLES **************************/
4557 /******************************************************************************/
4561 * Handler for client connection.
4563 * @param cls Closure (unused).
4564 * @param client Client handler.
4567 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
4569 struct MeshClient *c;
4573 c = GNUNET_malloc (sizeof (struct MeshClient));
4575 GNUNET_SERVER_client_keep (client);
4576 GNUNET_SERVER_client_set_user_context (client, c);
4577 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4582 * Handler for client disconnection
4584 * @param cls closure
4585 * @param client identification of the client; NULL
4586 * for the last call when the server is destroyed
4589 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4591 struct MeshClient *c;
4592 struct MeshClient *next;
4594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
4597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4601 c = client_get (client);
4604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
4606 GNUNET_SERVER_client_drop (c->handle);
4607 c->shutting_down = GNUNET_YES;
4608 if (NULL != c->own_tunnels)
4610 GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels,
4611 &tunnel_destroy_iterator, c);
4612 GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels);
4615 if (NULL != c->incoming_tunnels)
4617 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels,
4618 &tunnel_destroy_iterator, c);
4619 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels);
4622 if (NULL != c->ports)
4623 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
4625 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
4628 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4633 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
4635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4641 * Handler for new clients
4643 * @param cls closure
4644 * @param client identification of the client
4645 * @param message the actual message, which includes messages the client wants
4648 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4649 const struct GNUNET_MessageHeader *message)
4651 struct GNUNET_MESH_ClientConnect *cc_msg;
4652 struct MeshClient *c;
4657 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
4659 /* Check data sanity */
4660 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4661 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4662 if (0 != (size % sizeof (uint32_t)))
4665 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4668 size /= sizeof (uint32_t);
4670 /* Initialize new client structure */
4671 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
4672 c->id = next_client_id++; /* overflow not important: just for debug */
4673 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
4674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
4679 p = (uint32_t *) &cc_msg[1];
4680 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
4681 for (i = 0; i < size; i++)
4684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
4686 /* store in client's hashmap */
4687 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
4688 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4689 /* store in global hashmap */
4690 /* FIXME only allow one client to have the port open,
4691 * have a backup hashmap with waiting clients */
4692 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
4693 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4697 c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4698 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4699 GNUNET_SERVER_notification_context_add (nc, client);
4700 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
4702 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
4708 * Handler for requests of new tunnels
4710 * @param cls Closure.
4711 * @param client Identification of the client.
4712 * @param message The actual message.
4715 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
4716 const struct GNUNET_MessageHeader *message)
4718 struct GNUNET_MESH_TunnelMessage *t_msg;
4719 struct MeshPeerInfo *peer_info;
4720 struct MeshTunnel *t;
4721 struct MeshClient *c;
4722 MESH_TunnelNumber tid;
4724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
4726 /* Sanity check for client registration */
4727 if (NULL == (c = client_get (client)))
4730 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4735 /* Message size sanity check */
4736 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4739 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4743 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4744 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4745 GNUNET_i2s (&t_msg->peer));
4746 /* Sanity check for tunnel numbering */
4747 tid = ntohl (t_msg->tunnel_id);
4748 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4751 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4754 /* Sanity check for duplicate tunnel IDs */
4755 if (NULL != tunnel_get_by_local_id (c, tid))
4758 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4763 while (NULL != tunnel_get_by_pi (myid, next_tid))
4764 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4765 t = tunnel_new (myid, next_tid, c, tid);
4766 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4770 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4773 t->port = ntohl (t_msg->port);
4774 tunnel_set_options (t, ntohl (t_msg->opt));
4775 if (GNUNET_YES == t->reliable)
4777 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
4778 t->fwd_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
4780 t->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
4783 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
4784 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
4786 peer_info = peer_get (&t_msg->peer);
4787 peer_info_add_tunnel (peer_info, t);
4788 peer_connect (peer_info, t);
4789 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4795 * Handler for requests of deleting tunnels
4797 * @param cls closure
4798 * @param client identification of the client
4799 * @param message the actual message
4802 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4803 const struct GNUNET_MessageHeader *message)
4805 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4806 struct MeshClient *c;
4807 struct MeshTunnel *t;
4808 MESH_TunnelNumber tid;
4810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4811 "Got a DESTROY TUNNEL from client!\n");
4813 /* Sanity check for client registration */
4814 if (NULL == (c = client_get (client)))
4817 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4820 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4822 /* Message sanity check */
4823 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4826 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4830 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4832 /* Retrieve tunnel */
4833 tid = ntohl (tunnel_msg->tunnel_id);
4834 t = tunnel_get_by_local_id(c, tid);
4837 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4839 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4843 /* Cleanup after the tunnel */
4844 client_delete_tunnel (c, t);
4851 peer_info_remove_tunnel (peer_get_short (t->dest), t);
4855 /* The tunnel will be destroyed when the last message is transmitted. */
4856 tunnel_destroy_empty (t);
4858 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4864 * Handler for client traffic
4866 * @param cls closure
4867 * @param client identification of the client
4868 * @param message the actual message
4871 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
4872 const struct GNUNET_MessageHeader *message)
4874 struct GNUNET_MESH_LocalData *data_msg;
4875 struct MeshClient *c;
4876 struct MeshTunnel *t;
4877 struct MeshFlowControl *fc;
4878 MESH_TunnelNumber tid;
4881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4882 "Got data from a client!\n");
4884 /* Sanity check for client registration */
4885 if (NULL == (c = client_get (client)))
4888 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4893 data_msg = (struct GNUNET_MESH_LocalData *) message;
4895 /* Sanity check for message size */
4896 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
4897 if (size < sizeof (struct GNUNET_MessageHeader))
4900 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4904 /* Tunnel exists? */
4905 tid = ntohl (data_msg->tid);
4906 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI)
4909 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4912 t = tunnel_get_by_local_id (c, tid);
4916 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4920 /* Is the client in the tunnel? */
4921 if ( !( (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
4923 t->owner->handle == client)
4925 (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
4927 t->client->handle == client) ) )
4930 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4934 /* Ok, everything is correct, send the message
4935 * (pretend we got it from a mesh peer)
4938 struct GNUNET_MESH_Data *payload;
4939 char cbuf[sizeof(struct GNUNET_MESH_Data) + size];
4941 fc = tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? &t->prev_fc : &t->next_fc;
4942 if (GNUNET_YES == t->reliable)
4944 struct MeshTunnelReliability *rel;
4945 struct MeshReliableMessage *copy;
4947 rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel;
4948 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage)
4949 + sizeof(struct GNUNET_MESH_Data)
4951 copy->mid = rel->mid_sent++;
4952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->mid);
4953 copy->timestamp = GNUNET_TIME_absolute_get ();
4956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
4957 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
4958 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
4961 GNUNET_TIME_relative_multiply (rel->expected_delay,
4962 MESH_RETRANSMIT_MARGIN);
4964 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
4965 &tunnel_retransmit_message,
4968 payload = (struct GNUNET_MESH_Data *) ©[1];
4969 payload->mid = htonl (copy->mid);
4973 payload = (struct GNUNET_MESH_Data *) cbuf;
4974 payload->mid = htonl (fc->last_pid_recv + 1);
4976 memcpy (&payload[1], &data_msg[1], size);
4977 payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size);
4978 payload->header.type = htons (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ?
4979 GNUNET_MESSAGE_TYPE_MESH_UNICAST :
4980 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4981 GNUNET_PEER_resolve(t->id.oid, &payload->oid);;
4982 payload->tid = htonl (t->id.tid);
4983 payload->ttl = htonl (default_ttl);
4984 payload->pid = htonl (fc->last_pid_recv + 1);
4985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4986 " calling generic handler...\n");
4987 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4988 handle_mesh_unicast (NULL, &my_full_id, &payload->header);
4990 handle_mesh_to_orig (NULL, &my_full_id, &payload->header);
4992 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
4993 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5000 * Handler for client's ACKs for payload traffic.
5002 * @param cls Closure (unused).
5003 * @param client Identification of the client.
5004 * @param message The actual message.
5007 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5008 const struct GNUNET_MessageHeader *message)
5010 struct GNUNET_MESH_LocalAck *msg;
5011 struct MeshTunnel *t;
5012 struct MeshClient *c;
5013 MESH_TunnelNumber tid;
5015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5016 /* Sanity check for client registration */
5017 if (NULL == (c = client_get (client)))
5020 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5025 msg = (struct GNUNET_MESH_LocalAck *) message;
5027 /* Tunnel exists? */
5028 tid = ntohl (msg->tunnel_id);
5029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5030 t = tunnel_get_by_local_id (c, tid);
5034 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5035 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5036 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5040 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5041 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5043 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5044 t->prev_fc.last_ack_recv++;
5045 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_NO);
5049 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5050 t->next_fc.last_ack_recv++;
5051 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_YES);
5054 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5062 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5064 * @param cls Closure (client handle).
5065 * @param key Key (hashed tunnel ID, unused).
5066 * @param value Tunnel info.
5068 * @return GNUNET_YES, to keep iterating.
5071 monitor_all_tunnels_iterator (void *cls,
5072 const struct GNUNET_HashCode * key,
5075 struct GNUNET_SERVER_Client *client = cls;
5076 struct MeshTunnel *t = value;
5077 struct GNUNET_MESH_LocalMonitor *msg;
5079 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5080 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5081 msg->tunnel_id = htonl (t->id.tid);
5082 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5083 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5084 GNUNET_PEER_resolve (t->dest, &msg->destination);
5086 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5087 "* sending info about tunnel %s [%u]\n",
5088 GNUNET_i2s (&msg->owner), t->id.tid);
5090 GNUNET_SERVER_notification_context_unicast (nc, client,
5091 &msg->header, GNUNET_NO);
5097 * Handler for client's MONITOR request.
5099 * @param cls Closure (unused).
5100 * @param client Identification of the client.
5101 * @param message The actual message.
5104 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5105 const struct GNUNET_MessageHeader *message)
5107 struct MeshClient *c;
5109 /* Sanity check for client registration */
5110 if (NULL == (c = client_get (client)))
5113 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5117 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5118 "Received get tunnels request from client %u\n",
5120 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5121 monitor_all_tunnels_iterator,
5123 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5124 "Get tunnels request from client %u completed\n",
5126 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5131 * Handler for client's MONITOR_TUNNEL request.
5133 * @param cls Closure (unused).
5134 * @param client Identification of the client.
5135 * @param message The actual message.
5138 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5139 const struct GNUNET_MessageHeader *message)
5141 const struct GNUNET_MESH_LocalMonitor *msg;
5142 struct GNUNET_MESH_LocalMonitor *resp;
5143 struct MeshClient *c;
5144 struct MeshTunnel *t;
5146 /* Sanity check for client registration */
5147 if (NULL == (c = client_get (client)))
5150 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5154 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5155 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5156 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5159 ntohl (msg->tunnel_id));
5160 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5163 /* We don't know the tunnel FIXME */
5164 struct GNUNET_MESH_LocalMonitor warn;
5167 GNUNET_SERVER_notification_context_unicast (nc, client,
5170 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5174 /* Initialize context */
5175 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5177 GNUNET_PEER_resolve (t->dest, &resp->destination);
5178 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5179 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5180 &resp->header, GNUNET_NO);
5183 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5184 "Monitor tunnel request from client %u completed\n",
5186 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5191 * Functions to handle messages from clients
5193 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5194 {&handle_local_new_client, NULL,
5195 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5196 {&handle_local_tunnel_create, NULL,
5197 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5198 sizeof (struct GNUNET_MESH_TunnelMessage)},
5199 {&handle_local_tunnel_destroy, NULL,
5200 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5201 sizeof (struct GNUNET_MESH_TunnelMessage)},
5202 {&handle_local_data, NULL,
5203 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
5204 {&handle_local_ack, NULL,
5205 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5206 sizeof (struct GNUNET_MESH_LocalAck)},
5207 {&handle_local_get_tunnels, NULL,
5208 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5209 sizeof (struct GNUNET_MessageHeader)},
5210 {&handle_local_show_tunnel, NULL,
5211 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5212 sizeof (struct GNUNET_MESH_LocalMonitor)},
5218 * Method called whenever a given peer connects.
5220 * @param cls closure
5221 * @param peer peer identity this notification is about
5224 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5226 struct MeshPeerInfo *peer_info;
5227 struct MeshPeerPath *path;
5229 DEBUG_CONN ("Peer connected\n");
5230 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5231 peer_info = peer_get (peer);
5232 if (myid == peer_info->id)
5234 DEBUG_CONN (" (self)\n");
5235 path = path_new (1);
5239 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5240 path = path_new (2);
5241 path->peers[1] = peer_info->id;
5242 GNUNET_PEER_change_rc (peer_info->id, 1);
5243 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5245 path->peers[0] = myid;
5246 GNUNET_PEER_change_rc (myid, 1);
5247 peer_info_add_path (peer_info, path, GNUNET_YES);
5253 * Method called whenever a peer disconnects.
5255 * @param cls closure
5256 * @param peer peer identity this notification is about
5259 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5261 struct MeshPeerInfo *pi;
5262 struct MeshPeerQueue *q;
5263 struct MeshPeerQueue *n;
5265 DEBUG_CONN ("Peer disconnected\n");
5266 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5276 /* TODO try to reroute this traffic instead */
5277 queue_destroy(q, GNUNET_YES);
5280 if (NULL != pi->core_transmit)
5282 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5283 pi->core_transmit = NULL;
5285 peer_remove_path (pi, pi->id, myid);
5288 DEBUG_CONN (" (self)\n");
5290 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5296 * Install server (service) handlers and start listening to clients.
5301 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5302 GNUNET_SERVER_connect_notify (server_handle,
5303 &handle_local_client_connect, NULL);
5304 GNUNET_SERVER_disconnect_notify (server_handle,
5305 &handle_local_client_disconnect, NULL);
5306 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5308 clients_head = NULL;
5309 clients_tail = NULL;
5311 GNUNET_SERVER_resume (server_handle);
5316 * To be called on core init/fail.
5318 * @param cls Closure (config)
5319 * @param server handle to the server for this service
5320 * @param identity the public identity of this peer
5323 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5324 const struct GNUNET_PeerIdentity *identity)
5326 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5329 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5330 GNUNET_break (core_handle == server);
5331 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5334 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5335 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5337 GNUNET_i2s (identity));
5338 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5340 GNUNET_i2s (&my_full_id));
5341 GNUNET_CORE_disconnect (core_handle);
5342 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5343 NULL, /* Closure passed to MESH functions */
5344 &core_init, /* Call core_init once connected */
5345 &core_connect, /* Handle connects */
5346 &core_disconnect, /* remove peers on disconnects */
5347 NULL, /* Don't notify about all incoming messages */
5348 GNUNET_NO, /* For header only in notification */
5349 NULL, /* Don't notify about all outbound messages */
5350 GNUNET_NO, /* For header-only out notification */
5351 core_handlers); /* Register these handlers */
5360 /******************************************************************************/
5361 /************************ MAIN FUNCTIONS ****************************/
5362 /******************************************************************************/
5365 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5367 * @param cls closure
5368 * @param key current key code
5369 * @param value value in the hash map
5370 * @return GNUNET_YES if we should continue to iterate,
5374 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5376 struct MeshTunnel *t = value;
5383 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5385 * @param cls closure
5386 * @param key current key code
5387 * @param value value in the hash map
5388 * @return GNUNET_YES if we should continue to iterate,
5392 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5394 struct MeshPeerInfo *p = value;
5395 struct MeshPeerQueue *q;
5396 struct MeshPeerQueue *n;
5404 queue_destroy(q, GNUNET_YES);
5408 peer_info_destroy (p);
5414 * Task run during shutdown.
5420 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5422 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5424 if (core_handle != NULL)
5426 GNUNET_CORE_disconnect (core_handle);
5429 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5430 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5431 if (dht_handle != NULL)
5433 GNUNET_DHT_disconnect (dht_handle);
5438 GNUNET_SERVER_notification_context_destroy (nc);
5441 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5443 GNUNET_SCHEDULER_cancel (announce_id_task);
5444 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5446 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5451 * Process mesh requests.
5453 * @param cls closure
5454 * @param server the initialized server
5455 * @param c configuration to use
5458 run (void *cls, struct GNUNET_SERVER_Handle *server,
5459 const struct GNUNET_CONFIGURATION_Handle *c)
5462 struct GNUNET_CRYPTO_EccPrivateKey *pk;
5464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5465 server_handle = server;
5466 GNUNET_SERVER_suspend (server_handle);
5469 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5472 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5474 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5475 "mesh", "peer/privatekey");
5476 GNUNET_SCHEDULER_shutdown ();
5481 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5482 &refresh_path_time))
5484 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5486 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5487 "mesh", "refresh path time");
5488 GNUNET_SCHEDULER_shutdown ();
5493 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5496 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5498 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5499 "mesh", "id announce time");
5500 GNUNET_SCHEDULER_shutdown ();
5505 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5508 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5510 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5511 "mesh", "connect timeout");
5512 GNUNET_SCHEDULER_shutdown ();
5517 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5520 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5522 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5523 "mesh", "max msgs queue");
5524 GNUNET_SCHEDULER_shutdown ();
5529 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5532 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5534 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5535 "mesh", "max tunnels");
5536 GNUNET_SCHEDULER_shutdown ();
5541 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5544 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5546 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5547 "mesh", "default ttl", 64);
5552 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5555 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5556 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5557 "mesh", "max peers", 1000);
5562 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
5569 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5570 "Mesh is running with drop mode enabled. "
5571 "This is NOT a good idea! "
5572 "Remove the DROP_PERCENT option from your configuration.\n");
5576 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5577 &dht_replication_level))
5579 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5581 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5582 "mesh", "dht replication level", 3);
5583 dht_replication_level = 3;
5586 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5587 incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5588 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5589 ports = GNUNET_CONTAINER_multihashmap32_create (32);
5591 dht_handle = GNUNET_DHT_connect (c, 64);
5592 if (NULL == dht_handle)
5596 stats = GNUNET_STATISTICS_create ("mesh", c);
5598 /* Scheduled the task to clean up when shutdown is called */
5599 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5601 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
5602 GNUNET_free (keyfile);
5603 GNUNET_assert (NULL != pk);
5604 my_private_key = pk;
5605 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5606 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5607 &my_full_id.hashPubKey);
5608 myid = GNUNET_PEER_intern (&my_full_id);
5609 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5610 "Mesh for peer [%s] starting\n",
5611 GNUNET_i2s(&my_full_id));
5613 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5614 NULL, /* Closure passed to MESH functions */
5615 &core_init, /* Call core_init once connected */
5616 &core_connect, /* Handle connects */
5617 &core_disconnect, /* remove peers on disconnects */
5618 NULL, /* Don't notify about all incoming messages */
5619 GNUNET_NO, /* For header only in notification */
5620 NULL, /* Don't notify about all outbound messages */
5621 GNUNET_NO, /* For header-only out notification */
5622 core_handlers); /* Register these handlers */
5623 if (NULL == core_handle)
5626 GNUNET_SCHEDULER_shutdown ();
5630 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5631 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5637 * The main function for the mesh service.
5639 * @param argc number of arguments from the command line
5640 * @param argv command line arguments
5641 * @return 0 ok, 1 on error
5644 main (int argc, char *const *argv)
5649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5650 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5652 ret = (GNUNET_OK == r) ? 0 : 1;
5653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");