2 This file is part of GNUnet.
3 (C) 2001-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
27 * - keep queues until receiving ACK
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);
584 unsigned int debug_fwd_ack;
585 unsigned int debug_bck_ack;
589 /******************************************************************************/
590 /*********************** GLOBAL VARIABLES ****************************/
591 /******************************************************************************/
593 /************************** Configuration parameters **************************/
596 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
598 static struct GNUNET_TIME_Relative refresh_path_time;
601 * How often to PUT own ID in the DHT.
603 static struct GNUNET_TIME_Relative id_announce_time;
606 * Maximum time allowed to connect to a peer found by string.
608 static struct GNUNET_TIME_Relative connect_timeout;
611 * Default TTL for payload packets.
613 static unsigned long long default_ttl;
616 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
618 static unsigned long long dht_replication_level;
621 * How many tunnels are we willing to maintain.
622 * Local tunnels are always allowed, even if there are more tunnels than max.
624 static unsigned long long max_tunnels;
627 * How many messages *in total* are we willing to queue, divided by number of
628 * tunnels to get tunnel queue size.
630 static unsigned long long max_msgs_queue;
633 * How many peers do we want to remember?
635 static unsigned long long max_peers;
638 * Percentage of messages that will be dropped (for test purposes only).
640 static unsigned long long drop_percent;
642 /*************************** Static global variables **************************/
645 * DLL with all the clients, head.
647 static struct MeshClient *clients_head;
650 * DLL with all the clients, tail.
652 static struct MeshClient *clients_tail;
655 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
657 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
660 * Number of tunnels known.
662 static unsigned long long n_tunnels;
665 * Tunnels incoming, indexed by MESH_TunnelNumber
666 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
668 static struct GNUNET_CONTAINER_MultiHashMap32 *incoming_tunnels;
671 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
673 static struct GNUNET_CONTAINER_MultiHashMap *peers;
676 * Handle to communicate with transport
678 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
681 * Handle to communicate with core.
683 static struct GNUNET_CORE_Handle *core_handle;
688 static struct GNUNET_DHT_Handle *dht_handle;
693 static struct GNUNET_SERVER_Handle *server_handle;
696 * Handle to the statistics service.
698 static struct GNUNET_STATISTICS_Handle *stats;
701 * Notification context, to send messages to local clients.
703 static struct GNUNET_SERVER_NotificationContext *nc;
706 * Local peer own ID (memory efficient handle).
708 static GNUNET_PEER_Id myid;
711 * Local peer own ID (full value).
713 static struct GNUNET_PeerIdentity my_full_id;
718 static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
723 static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key;
726 * Tunnel ID for the next created tunnel (global tunnel number).
728 static MESH_TunnelNumber next_tid;
731 * Tunnel ID for the next incoming tunnel (local tunnel number).
733 static MESH_TunnelNumber next_local_tid;
736 * All ports clients of this peer have opened.
738 static struct GNUNET_CONTAINER_MultiHashMap32 *ports;
741 * Task to periodically announce itself in the network.
743 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
746 * Next ID to assign to a client.
748 unsigned int next_client_id;
751 /******************************************************************************/
752 /*********************** DECLARATIONS **************************/
753 /******************************************************************************/
756 * Function to process paths received for a new peer addition. The recorded
757 * paths form the initial tunnel, which can be optimized later.
758 * Called on each result obtained for the DHT search.
761 * @param exp when will this value expire
762 * @param key key of the result
763 * @param type type of the result
764 * @param size number of bytes in data
765 * @param data pointer to the result data
768 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
769 const struct GNUNET_HashCode * key,
770 const struct GNUNET_PeerIdentity *get_path,
771 unsigned int get_path_length,
772 const struct GNUNET_PeerIdentity *put_path,
773 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
774 size_t size, const void *data);
778 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
779 * and insert it in the appropriate structures if the peer is not known yet.
781 * @param peer Full identity of the peer.
783 * @return Existing or newly created peer info.
785 static struct MeshPeerInfo *
786 peer_get (const struct GNUNET_PeerIdentity *peer);
790 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
791 * and insert it in the appropriate structures if the peer is not known yet.
793 * @param peer Short identity of the peer.
795 * @return Existing or newly created peer info.
797 static struct MeshPeerInfo *
798 peer_get_short (const GNUNET_PEER_Id peer);
802 * Build a PeerPath from the paths returned from the DHT, reversing the paths
803 * to obtain a local peer -> destination path and interning the peer ids.
805 * @return Newly allocated and created path
807 static struct MeshPeerPath *
808 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
809 unsigned int get_path_length,
810 const struct GNUNET_PeerIdentity *put_path,
811 unsigned int put_path_length);
815 * Adds a path to the peer_infos of all the peers in the path
817 * @param p Path to process.
818 * @param confirmed Whether we know if the path works or not.
821 path_add_to_peers (struct MeshPeerPath *p, int confirmed);
826 * Search for a tunnel by global ID using full PeerIdentities.
828 * @param oid owner of the tunnel.
829 * @param tid global tunnel number.
831 * @return tunnel handler, NULL if doesn't exist.
833 static struct MeshTunnel *
834 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
838 * Notify a tunnel that a connection has broken that affects at least
841 * @param t Tunnel affected.
842 * @param p1 Peer that got disconnected from p2.
843 * @param p2 Peer that got disconnected from p1.
845 * @return Short ID of the peer disconnected (either p1 or p2).
846 * 0 if the tunnel remained unaffected.
848 static GNUNET_PEER_Id
849 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
854 * @brief Use the given path for the tunnel.
855 * Update the next and prev hops (and RCs).
856 * (Re)start the path refresh in case the tunnel is locally owned.
858 * @param t Tunnel to update.
859 * @param p Path to use.
862 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p);
865 * Tunnel is empty: destroy it.
867 * Notifies all participants (peers, cleints) about the destruction.
869 * @param t Tunnel to destroy.
872 tunnel_destroy_empty (struct MeshTunnel *t);
875 * @brief Queue and pass message to core when possible.
877 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
878 * and accounts for it. In case the queue is full, the message is dropped and
881 * Otherwise, message is treated as internal and allowed to go regardless of
884 * @param cls Closure (@c type dependant). It will be used by queue_send to
885 * build the message to be sent if not already prebuilt.
886 * @param type Type of the message, 0 for a raw message.
887 * @param size Size of the message.
888 * @param dst Neighbor to send message to.
889 * @param t Tunnel this message belongs to.
892 queue_add (void *cls, uint16_t type, size_t size,
893 struct MeshPeerInfo *dst, struct MeshTunnel *t);
897 * Free a transmission that was already queued with all resources
898 * associated to the request.
900 * @param queue Queue handler to cancel.
901 * @param clear_cls Is it necessary to free associated cls?
904 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
908 * @brief Get the next transmittable message from the queue.
910 * This will be the head, except in the case of being a data packet
911 * not allowed by the destination peer.
913 * @param peer Destination peer.
915 * @return The next viable MeshPeerQueue element to send to that peer.
916 * NULL when there are no transmittable messages.
918 struct MeshPeerQueue *
919 queue_get_next (const struct MeshPeerInfo *peer);
923 * Core callback to write a queued packet to core buffer
925 * @param cls Closure (peer info).
926 * @param size Number of bytes available in buf.
927 * @param buf Where the to write the message.
929 * @return number of bytes written to buf
932 queue_send (void *cls, size_t size, void *buf);
935 /******************************************************************************/
936 /************************ PERIODIC FUNCTIONS ****************************/
937 /******************************************************************************/
940 * Periodically announce self id in the DHT
943 * @param tc task context
946 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
950 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
952 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
956 * - Set data expiration in function of X
959 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
961 block.id = my_full_id;
962 GNUNET_DHT_put (dht_handle, /* DHT handle */
963 &my_full_id.hashPubKey, /* Key to use */
964 dht_replication_level, /* Replication level */
965 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
966 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
967 sizeof (block), /* Size of the data */
968 (const char *) &block, /* Data itself */
969 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
970 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
971 NULL, /* Continuation */
972 NULL); /* Continuation closure */
974 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
978 /******************************************************************************/
979 /****************** GENERAL HELPER FUNCTIONS ************************/
980 /******************************************************************************/
984 * Check if client has registered with the service and has not disconnected
986 * @param client the client to check
988 * @return non-NULL if client exists in the global DLL
990 static struct MeshClient *
991 client_get (struct GNUNET_SERVER_Client *client)
993 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
998 * Deletes a tunnel from a client (either owner or destination). To be used on
1001 * @param c Client whose tunnel to delete.
1002 * @param t Tunnel which should be deleted.
1005 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1009 GNUNET_assert (GNUNET_YES ==
1010 GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels,
1016 GNUNET_assert (GNUNET_YES ==
1017 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
1024 * Notify the appropriate client that a new incoming tunnel was created.
1026 * @param t Tunnel that was created.
1029 send_client_tunnel_create (struct MeshTunnel *t)
1031 struct GNUNET_MESH_TunnelMessage msg;
1033 if (NULL == t->client)
1035 msg.header.size = htons (sizeof (msg));
1036 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1037 msg.tunnel_id = htonl (t->local_tid_dest);
1038 msg.port = htonl (t->port);
1040 msg.opt |= GNUNET_YES == t->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0;
1041 msg.opt |= GNUNET_YES == t->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0;
1042 msg.opt = htonl (msg.opt);
1043 GNUNET_PEER_resolve (t->id.oid, &msg.peer);
1044 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1045 &msg.header, GNUNET_NO);
1050 * Notify dest client that the incoming tunnel is no longer valid.
1052 * @param c Client to notify..
1053 * @param t Tunnel that is destroyed.
1056 send_client_tunnel_destroy (struct MeshClient *c, struct MeshTunnel *t)
1058 struct GNUNET_MESH_TunnelMessage msg;
1065 if (c != t->client && c != t->owner)
1070 msg.header.size = htons (sizeof (msg));
1071 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1072 msg.tunnel_id = htonl (t->local_tid_dest);
1073 msg.port = htonl (0);
1074 memset(&msg.peer, 0, sizeof (msg.peer));
1075 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1076 &msg.header, GNUNET_NO);
1081 * Iterator over all the peers to remove the oldest not-used entry.
1083 * @param cls Closure (unsued).
1084 * @param key ID of the peer.
1085 * @param value Peer_Info of the peer.
1090 peer_info_timeout (void *cls,
1091 const struct GNUNET_HashCode *key,
1098 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1099 * and insert it in the appropriate structures if the peer is not known yet.
1101 * @param peer Full identity of the peer.
1103 * @return Existing or newly created peer info.
1105 static struct MeshPeerInfo *
1106 peer_get (const struct GNUNET_PeerIdentity *peer)
1108 struct MeshPeerInfo *peer_info;
1110 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1111 if (NULL == peer_info)
1114 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1115 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1117 GNUNET_CONTAINER_multihashmap_iterate (peers,
1121 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1122 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1123 peer_info->id = GNUNET_PEER_intern (peer);
1125 peer_info->last_contact = GNUNET_TIME_absolute_get();
1132 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1133 * and insert it in the appropriate structures if the peer is not known yet.
1135 * @param peer Short identity of the peer.
1137 * @return Existing or newly created peer info.
1139 static struct MeshPeerInfo *
1140 peer_get_short (const GNUNET_PEER_Id peer)
1142 struct GNUNET_PeerIdentity id;
1144 GNUNET_PEER_resolve (peer, &id);
1145 return peer_get (&id);
1150 * Choose the best path towards a peer considering the tunnel properties.
1152 * @param peer The destination peer.
1153 * @param t The tunnel the path is for.
1155 * @return Best current known path towards the peer, if any.
1157 static struct MeshPeerPath *
1158 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1160 struct MeshPeerPath *best_p;
1161 struct MeshPeerPath *p;
1162 unsigned int best_cost;
1165 best_p = p = peer->path_head;
1166 best_cost = cost = p->length;
1169 if ((cost = p->length) < best_cost)
1180 * Core callback to write a pre-constructed data packet to core buffer
1182 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1183 * @param size Number of bytes available in buf.
1184 * @param buf Where the to write the message.
1186 * @return number of bytes written to buf
1189 send_core_data_raw (void *cls, size_t size, void *buf)
1191 struct GNUNET_MessageHeader *msg = cls;
1194 GNUNET_assert (NULL != msg);
1195 total_size = ntohs (msg->size);
1197 if (total_size > size)
1202 memcpy (buf, msg, total_size);
1209 * Sends an already built message to a peer, properly registrating
1210 * all used resources.
1212 * @param message Message to send. Function makes a copy of it.
1213 * @param peer Short ID of the neighbor whom to send the message.
1214 * @param t Tunnel on which this message is transmitted.
1217 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1218 GNUNET_PEER_Id peer,
1219 struct MeshTunnel *t)
1221 struct GNUNET_PeerIdentity id;
1222 struct MeshPeerInfo *neighbor;
1223 struct MeshPeerPath *p;
1228 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1233 size = ntohs (message->size);
1234 data = GNUNET_malloc (size);
1235 memcpy (data, message, size);
1236 type = ntohs(message->type);
1237 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
1238 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
1240 struct GNUNET_MESH_Data *u;
1242 u = (struct GNUNET_MESH_Data *) data;
1243 u->ttl = htonl (ntohl (u->ttl) - 1);
1245 GNUNET_PEER_resolve (peer, &id);
1246 neighbor = peer_get (&id);
1247 for (p = neighbor->path_head; NULL != p; p = p->next)
1257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1258 " %s IS NOT DIRECTLY CONNECTED\n",
1260 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1263 for (p = neighbor->path_head; NULL != p; p = p->next)
1265 struct GNUNET_PeerIdentity debug_id;
1268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1269 " path with %u hops through:\n",
1271 for (i = 0; i < p->length; i++)
1273 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1274 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1276 i, GNUNET_i2s(&debug_id));
1280 GNUNET_break (0); // FIXME sometimes fails (testing disconnect?)
1281 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1282 " no direct connection to %s\n",
1287 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1298 * Sends a CREATE PATH message for a path to a peer, properly registrating
1299 * all used resources.
1301 * @param t Tunnel for which the path is created.
1304 send_create_path (struct MeshTunnel *t)
1306 struct MeshPeerInfo *neighbor;
1308 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send create path\n");
1309 neighbor = peer_get_short (t->next_hop);
1311 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1312 sizeof (struct GNUNET_MESH_CreateTunnel) +
1313 (t->path->length * sizeof (struct GNUNET_PeerIdentity)),
1316 t->state = MESH_TUNNEL_WAITING;
1321 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1323 * @param t Tunnel which to confirm.
1326 send_path_ack (struct MeshTunnel *t)
1328 struct MeshPeerInfo *peer;
1330 peer = peer_get_short (t->prev_hop);
1333 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1334 sizeof (struct GNUNET_MESH_PathACK),
1341 * Try to establish a new connection to this peer in the given tunnel.
1342 * If the peer doesn't have any path to it yet, try to get one.
1343 * If the peer already has some path, send a CREATE PATH towards it.
1345 * @param peer PeerInfo of the peer.
1346 * @param t Tunnel for which to create the path, if possible.
1349 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1351 struct MeshPeerPath *p;
1353 if (NULL != peer->path_head)
1355 p = peer_get_best_path (peer, t);
1356 tunnel_use_path (t, p);
1357 send_create_path (t);
1359 else if (NULL == peer->dhtget)
1361 struct GNUNET_PeerIdentity id;
1363 GNUNET_PEER_resolve (peer->id, &id);
1364 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1365 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1366 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1367 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1368 &id.hashPubKey, /* key to search */
1369 dht_replication_level, /* replication level */
1370 GNUNET_DHT_RO_RECORD_ROUTE |
1371 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1373 0, /* xquery bits */
1374 &dht_get_id_handler, peer);
1375 t->state = MESH_TUNNEL_SEARCHING;
1379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1380 "There is no path but the DHT GET is already started.\n");
1386 * Destroy the peer_info and free any allocated resources linked to it
1388 * @param pi The peer_info to destroy.
1390 * @return GNUNET_OK on success
1393 peer_info_destroy (struct MeshPeerInfo *pi)
1395 struct GNUNET_PeerIdentity id;
1396 struct MeshPeerPath *p;
1397 struct MeshPeerPath *nextp;
1400 GNUNET_PEER_resolve (pi->id, &id);
1401 GNUNET_PEER_change_rc (pi->id, -1);
1404 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1407 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1408 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1410 if (NULL != pi->dhtget)
1412 GNUNET_DHT_get_stop (pi->dhtget);
1418 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1422 for (i = 0; i < pi->ntunnels; i++)
1423 tunnel_destroy_empty (pi->tunnels[i]);
1424 GNUNET_array_grow (pi->tunnels, pi->ntunnels, 0);
1431 * Remove all paths that rely on a direct connection between p1 and p2
1432 * from the peer itself and notify all tunnels about it.
1434 * @param peer PeerInfo of affected peer.
1435 * @param p1 GNUNET_PEER_Id of one peer.
1436 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1439 * TODO: optimize (see below)
1442 peer_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1445 struct MeshPeerPath *p;
1446 struct MeshPeerPath *next;
1447 struct MeshPeerInfo *peer_d;
1449 unsigned int destroyed;
1452 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1454 for (p = peer->path_head; NULL != p; p = next)
1457 for (i = 0; i < (p->length - 1); i++)
1459 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1460 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1462 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1472 for (i = 0; i < peer->ntunnels; i++)
1474 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1478 peer_d = peer_get_short (d);
1479 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1480 tunnel_use_path (peer->tunnels[i], next);
1481 peer_connect (peer_d, peer->tunnels[i]);
1483 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1488 * Add the path to the peer and update the path used to reach it in case this
1491 * @param peer_info Destination peer to add the path to.
1492 * @param path New path to add. Last peer must be the peer in arg 1.
1493 * Path will be either used of freed if already known.
1494 * @param trusted Do we trust that this path is real?
1497 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1500 struct MeshPeerPath *aux;
1504 if ((NULL == peer_info) || (NULL == path))
1507 path_destroy (path);
1510 if (path->peers[path->length - 1] != peer_info->id)
1513 path_destroy (path);
1516 if (2 >= path->length && GNUNET_NO == trusted)
1518 /* Only allow CORE to tell us about direct paths */
1519 path_destroy (path);
1522 for (l = 1; l < path->length; l++)
1524 if (path->peers[l] == myid)
1526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1527 for (l2 = 0; l2 < path->length - l; l2++)
1529 path->peers[l2] = path->peers[l + l2];
1534 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1539 struct GNUNET_PeerIdentity id;
1541 GNUNET_PEER_resolve (peer_info->id, &id);
1542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1543 path->length, GNUNET_i2s (&id));
1546 l = path_get_length (path);
1549 path_destroy (path);
1553 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1554 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1556 l2 = path_get_length (aux);
1559 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1560 peer_info->path_tail, aux, path);
1565 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1567 path_destroy (path);
1572 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1579 * Add the path to the origin peer and update the path used to reach it in case
1580 * this is the shortest.
1581 * The path is given in peer_info -> destination, therefore we turn the path
1582 * upside down first.
1584 * @param peer_info Peer to add the path to, being the origin of the path.
1585 * @param path New path to add after being inversed.
1586 * Path will be either used or freed.
1587 * @param trusted Do we trust that this path is real?
1590 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1591 struct MeshPeerPath *path, int trusted)
1594 peer_info_add_path (peer_info, path, trusted);
1599 * Add a tunnel to the list of tunnels a peer participates in.
1600 * Update the tunnel's destination.
1602 * @param p Peer to add to.
1603 * @param t Tunnel to add.
1606 peer_info_add_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1610 GNUNET_break (t->dest == p->id);
1614 GNUNET_PEER_change_rc (t->dest, 1);
1615 GNUNET_array_append (p->tunnels, p->ntunnels, t);
1620 * Remove a tunnel from the list of tunnels a peer participates in.
1621 * Free the tunnel's destination.
1623 * @param p Peer to clean.
1624 * @param t Tunnel to remove.
1627 peer_info_remove_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1631 if (t->dest == p->id)
1633 GNUNET_PEER_change_rc (t->dest, -1);
1636 for (i = 0; i < p->ntunnels; i++)
1638 if (p->tunnels[i] == t)
1640 p->tunnels[i] = p->tunnels[p->ntunnels - 1];
1641 GNUNET_array_grow (p->tunnels, p->ntunnels, p->ntunnels - 1);
1649 * Function called if the connection to the peer has been stalled for a while,
1650 * possibly due to a missed ACK. Poll the peer about its ACK status.
1652 * @param cls Closure (poll ctx).
1653 * @param tc TaskContext.
1656 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1658 struct MeshFlowControl *fc = cls;
1659 struct GNUNET_MESH_Poll msg;
1660 struct MeshTunnel *t = fc->t;
1661 GNUNET_PEER_Id peer;
1663 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1664 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n");
1671 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
1672 msg.header.size = htons (sizeof (msg));
1673 msg.tid = htonl (t->id.tid);
1674 msg.pid = htonl (fc->last_pid_sent);
1675 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1677 if (fc == &t->prev_fc)
1679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** prev peer!\n");
1682 else if (fc == &t->next_fc)
1684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** next peer!\n");
1692 send_prebuilt_message (&msg.header, peer, t);
1693 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
1694 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
1700 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1701 * to obtain a local peer -> destination path and interning the peer ids.
1703 * @return Newly allocated and created path
1705 static struct MeshPeerPath *
1706 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1707 unsigned int get_path_length,
1708 const struct GNUNET_PeerIdentity *put_path,
1709 unsigned int put_path_length)
1711 struct MeshPeerPath *p;
1717 GNUNET_PEER_change_rc (myid, 1);
1718 i = get_path_length;
1719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
1720 for (i--; i >= 0; i--)
1722 id = GNUNET_PEER_intern (&get_path[i]);
1723 if (p->length > 0 && id == p->peers[p->length - 1])
1725 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1726 GNUNET_PEER_change_rc (id, -1);
1730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
1731 GNUNET_i2s (&get_path[i]));
1733 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1734 p->peers[p->length - 1] = id;
1737 i = put_path_length;
1738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
1739 for (i--; i >= 0; i--)
1741 id = GNUNET_PEER_intern (&put_path[i]);
1744 /* PUT path went through us, so discard the path up until now and start
1745 * from here to get a much shorter (and loop-free) path.
1750 if (p->length > 0 && id == p->peers[p->length - 1])
1752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
1753 GNUNET_PEER_change_rc (id, -1);
1757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
1758 GNUNET_i2s (&put_path[i]));
1760 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
1761 p->peers[p->length - 1] = id;
1765 if (get_path_length > 0)
1766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
1767 GNUNET_i2s (&get_path[0]));
1768 if (put_path_length > 0)
1769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
1770 GNUNET_i2s (&put_path[0]));
1771 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
1773 for (i = 0; i < p->length; i++)
1775 struct GNUNET_PeerIdentity peer_id;
1777 GNUNET_PEER_resolve (p->peers[i], &peer_id);
1778 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
1779 GNUNET_i2s (&peer_id));
1787 * Adds a path to the peer_infos of all the peers in the path
1789 * @param p Path to process.
1790 * @param confirmed Whether we know if the path works or not.
1793 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
1797 /* TODO: invert and add */
1798 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
1799 for (i++; i < p->length; i++)
1801 struct MeshPeerInfo *aux;
1802 struct MeshPeerPath *copy;
1804 aux = peer_get_short (p->peers[i]);
1805 copy = path_duplicate (p);
1806 copy->length = i + 1;
1807 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
1813 * Send keepalive packets for a peer
1815 * @param cls Closure (tunnel for which to send the keepalive).
1816 * @param tc Notification context.
1819 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
1823 * Search for a tunnel among the incoming tunnels
1825 * @param tid the local id of the tunnel
1827 * @return tunnel handler, NULL if doesn't exist
1829 static struct MeshTunnel *
1830 tunnel_get_incoming (MESH_TunnelNumber tid)
1832 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
1833 return GNUNET_CONTAINER_multihashmap32_get (incoming_tunnels, tid);
1838 * Search for a tunnel among the tunnels for a client
1840 * @param c the client whose tunnels to search in
1841 * @param tid the local id of the tunnel
1843 * @return tunnel handler, NULL if doesn't exist
1845 static struct MeshTunnel *
1846 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
1848 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
1850 return tunnel_get_incoming (tid);
1854 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI);
1855 return GNUNET_CONTAINER_multihashmap32_get (c->own_tunnels, tid);
1861 * Search for a tunnel by global ID using PEER_ID
1863 * @param pi owner of the tunnel
1864 * @param tid global tunnel number
1866 * @return tunnel handler, NULL if doesn't exist
1868 static struct MeshTunnel *
1869 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
1871 struct MESH_TunnelID id;
1872 struct GNUNET_HashCode hash;
1877 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
1878 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
1883 * Search for a tunnel by global ID using full PeerIdentities
1885 * @param oid owner of the tunnel
1886 * @param tid global tunnel number
1888 * @return tunnel handler, NULL if doesn't exist
1890 static struct MeshTunnel *
1891 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
1893 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
1898 * Add a client to a tunnel, initializing all needed data structures.
1900 * @param t Tunnel to which add the client.
1901 * @param c Client which to add to the tunnel.
1904 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
1906 if (NULL != t->client)
1912 GNUNET_CONTAINER_multihashmap32_put (c->incoming_tunnels,
1913 t->local_tid_dest, t,
1914 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1920 GNUNET_CONTAINER_multihashmap32_put (incoming_tunnels,
1921 t->local_tid_dest, t,
1922 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
1932 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
1934 unsigned int own_pos;
1936 for (own_pos = 0; own_pos < p->length; own_pos++)
1938 if (p->peers[own_pos] == myid)
1941 if (own_pos > p->length - 1)
1947 if (own_pos < p->length - 1)
1948 t->next_hop = p->peers[own_pos + 1];
1950 t->next_hop = p->peers[own_pos];
1951 GNUNET_PEER_change_rc (t->next_hop, 1);
1953 t->prev_hop = p->peers[own_pos - 1];
1955 t->prev_hop = p->peers[0];
1956 GNUNET_PEER_change_rc (t->prev_hop, 1);
1958 if (NULL != t->path)
1959 path_destroy (t->path);
1960 t->path = path_duplicate (p);
1963 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
1964 GNUNET_SCHEDULER_cancel (t->maintenance_task);
1965 t->maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
1972 * Notifies a tunnel that a connection has broken that affects at least
1973 * some of its peers. Sends a notification towards the root of the tree.
1974 * In case the peer is the owner of the tree, notifies the client that owns
1975 * the tunnel and tries to reconnect.
1977 * @param t Tunnel affected.
1978 * @param p1 Peer that got disconnected from p2.
1979 * @param p2 Peer that got disconnected from p1.
1981 * @return Short ID of the peer disconnected (either p1 or p2).
1982 * 0 if the tunnel remained unaffected.
1984 static GNUNET_PEER_Id
1985 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
1988 // if (myid != p1 && myid != p2) FIXME
1993 // if (tree_get_predecessor (t->tree) != 0)
1995 // /* We are the peer still connected, notify owner of the disconnection. */
1996 // struct GNUNET_MESH_PathBroken msg;
1997 // struct GNUNET_PeerIdentity neighbor;
1999 // msg.header.size = htons (sizeof (msg));
2000 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2001 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2002 // msg.tid = htonl (t->id.tid);
2003 // msg.peer1 = my_full_id;
2004 // GNUNET_PEER_resolve (pid, &msg.peer2);
2005 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2006 // send_prebuilt_message (&msg.header, &neighbor, t);
2013 * Build a local ACK message and send it to a local client.
2015 * @param t Tunnel on which to send the ACK.
2016 * @param c Client to whom send the ACK.
2017 * @param is_fwd Set to GNUNET_YES for FWD ACK (dest->owner)
2020 send_local_ack (struct MeshTunnel *t,
2021 struct MeshClient *c,
2024 struct GNUNET_MESH_LocalAck msg;
2026 msg.header.size = htons (sizeof (msg));
2027 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
2028 msg.tunnel_id = htonl (is_fwd ? t->local_tid : t->local_tid_dest);
2029 GNUNET_SERVER_notification_context_unicast (nc,
2036 * Build an ACK message and queue it to send to the given peer.
2038 * @param t Tunnel on which to send the ACK.
2039 * @param peer Peer to whom send the ACK.
2040 * @param ack Value of the ACK.
2043 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
2045 struct GNUNET_MESH_ACK msg;
2047 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2048 msg.header.size = htons (sizeof (msg));
2049 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
2050 msg.pid = htonl (ack);
2051 msg.tid = htonl (t->id.tid);
2053 send_prebuilt_message (&msg.header, peer, t);
2058 * Send an end-to-end FWD ACK message for the most recent in-sequence payload.
2060 * @param t Tunnel this is about.
2063 tunnel_send_fwd_data_ack (struct MeshTunnel *t)
2065 struct GNUNET_MESH_DataACK msg;
2066 struct MeshTunnelReliability *rel;
2067 struct MeshReliableMessage *copy;
2072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2073 "send_fwd_data_ack for %llu\n",
2074 t->bck_rel->mid_recv - 1);
2076 if (GNUNET_NO == t->reliable)
2078 GNUNET_break_op (0);
2081 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK);
2082 msg.header.size = htons (sizeof (msg));
2083 msg.tid = htonl (t->id.tid);
2084 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2085 msg.mid = GNUNET_htonll (t->bck_rel->mid_recv - 1);
2088 for (i = 0, copy = rel->head_recv;
2089 i < 64 && NULL != copy;
2090 i++, copy = copy->next)
2092 delta = copy->mid - t->bck_rel->mid_recv;
2093 mask = 0x1 << delta;
2094 msg.futures |= mask;
2095 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2096 " setting bit for %u (delta %u) (%llX) -> %llX\n",
2097 copy->mid, delta, mask, msg.futures);
2099 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " final futures %llX\n", msg.futures);
2101 send_prebuilt_message (&msg.header, t->prev_hop, t);
2102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_fwd_data_ack END\n");
2107 * Send an end-to-end BCK ACK message for the most recent in-sequence payload.
2109 * @param t Tunnel this is about.
2112 tunnel_send_bck_data_ack (struct MeshTunnel *t)
2114 struct GNUNET_MESH_DataACK msg;
2116 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK);
2117 msg.header.size = htons (sizeof (msg));
2118 msg.tid = htonl (t->id.tid);
2119 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2120 msg.mid = GNUNET_htonll (t->fwd_rel->mid_recv - 1);
2121 msg.futures = 0; // FIXME set bits of other newer messages received
2123 send_prebuilt_message (&msg.header, t->next_hop, t);
2128 * Send an ACK informing the predecessor about the available buffer space.
2129 * In case there is no predecessor, inform the owning client.
2130 * If buffering is off, send only on behalf of children or self if endpoint.
2131 * If buffering is on, send when sent to children and buffer space is free.
2132 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
2133 * the ACK itself goes "back" (towards root).
2135 * @param t Tunnel on which to send the ACK.
2136 * @param type Type of message that triggered the ACK transmission.
2139 tunnel_send_fwd_ack (struct MeshTunnel *t, uint16_t type)
2144 /* Is it after unicast retransmission? */
2147 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2149 "ACK due to FWD DATA retransmission\n");
2150 if (GNUNET_YES == t->nobuffer)
2152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
2155 if (GNUNET_YES == t->reliable && NULL != t->client)
2156 tunnel_send_fwd_data_ack (t);
2158 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2159 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2161 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2162 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2163 t->force_ack = GNUNET_YES;
2169 /* Check if we need to transmit the ACK */
2170 if (0 && NULL == t->owner &&
2171 t->queue_max > t->next_fc.queue_n * 4 &&
2172 GMC_is_pid_bigger(t->prev_fc.last_ack_sent, t->prev_fc.last_pid_recv) &&
2173 GNUNET_NO == t->force_ack)
2175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, buffer free\n");
2176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2177 " t->qmax: %u, t->qn: %u\n",
2178 t->queue_max, t->next_fc.queue_n);
2179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2180 " t->pid: %u, t->ack: %u\n",
2181 t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent);
2185 /* Ok, ACK might be necessary, what PID to ACK? */
2186 delta = t->queue_max - t->next_fc.queue_n;
2187 if (0 > delta || (GNUNET_YES == t->reliable &&
2189 t->fwd_rel->n_sent > 10))
2191 if (NULL != t->owner && delta > 1)
2193 ack = t->prev_fc.last_pid_recv + delta;
2194 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK %u\n", ack);
2195 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2196 " last %u, qmax %u, q %u\n",
2197 t->prev_fc.last_pid_recv, t->queue_max, t->next_fc.queue_n);
2198 if (ack == t->prev_fc.last_ack_sent && GNUNET_NO == t->force_ack)
2200 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
2204 t->prev_fc.last_ack_sent = ack;
2205 if (NULL != t->owner)
2206 send_local_ack (t, t->owner, GNUNET_YES);
2207 else if (0 != t->prev_hop)
2208 send_ack (t, t->prev_hop, ack);
2212 t->force_ack = GNUNET_NO;
2217 * Send an ACK informing the children node/client about the available
2219 * If buffering is off, send only on behalf of root (can be self).
2220 * If buffering is on, send when sent to predecessor and buffer space is free.
2221 * Note that although the name is bck_ack, the BCK mean backwards *traffic*,
2222 * the ACK itself goes "forward" (towards children/clients).
2224 * @param t Tunnel on which to send the ACK.
2225 * @param type Type of message that triggered the ACK transmission.
2228 tunnel_send_bck_ack (struct MeshTunnel *t, uint16_t type)
2231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2232 "Sending BCK ACK on tunnel %u [%u] due to %s\n",
2233 t->id.oid, t->id.tid, GNUNET_MESH_DEBUG_M2S(type));
2234 /* Is it after data to_origin retransmission? */
2237 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2238 if (GNUNET_YES == t->nobuffer)
2240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2241 " Not sending ACK, nobuffer + traffic\n");
2244 if (GNUNET_YES == t->reliable && NULL != t->owner)
2245 tunnel_send_bck_data_ack (t);
2247 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2248 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2250 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2251 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2252 t->force_ack = GNUNET_YES;
2258 /* TODO: Check if we need to transmit the ACK (as in fwd) */
2260 ack = t->next_fc.last_pid_recv + t->queue_max - t->prev_fc.queue_n;
2262 if (t->next_fc.last_ack_sent == ack && GNUNET_NO == t->force_ack)
2264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2265 " Not sending ACK, not needed, last ack sent was %u\n",
2266 t->next_fc.last_ack_sent);
2269 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2270 " Sending BCK ACK %u (last sent: %u)\n",
2271 ack, t->next_fc.last_ack_sent);
2272 t->next_fc.last_ack_sent = ack;
2274 if (NULL != t->client)
2275 send_local_ack (t, t->client, GNUNET_NO);
2276 else if (0 != t->next_hop)
2277 send_ack (t, t->next_hop, ack);
2280 t->force_ack = GNUNET_NO;
2285 * Modify the mesh message TID from global to local and send to client.
2287 * @param t Tunnel on which to send the message.
2288 * @param msg Message to modify and send.
2289 * @param c Client to send to.
2290 * @param tid Tunnel ID to use (c can be both owner and client).
2293 tunnel_send_client_data (struct MeshTunnel *t,
2294 const struct GNUNET_MESH_Data *msg,
2295 struct MeshClient *c, MESH_TunnelNumber tid)
2297 struct GNUNET_MESH_LocalData *copy;
2298 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
2299 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
2301 if (size < sizeof (struct GNUNET_MessageHeader))
2303 GNUNET_break_op (0);
2311 copy = (struct GNUNET_MESH_LocalData *) cbuf;
2312 memcpy (©[1], &msg[1], size);
2313 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
2314 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
2315 copy->tid = htonl (tid);
2316 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2317 ©->header, GNUNET_NO);
2321 * Modify the unicast message TID from global to local and send to client.
2323 * @param t Tunnel on which to send the message.
2324 * @param msg Message to modify and send.
2327 tunnel_send_client_ucast (struct MeshTunnel *t,
2328 const struct GNUNET_MESH_Data *msg)
2330 tunnel_send_client_data (t, msg, t->client, t->local_tid_dest);
2335 * Send up to 64 buffered messages to the client for in order delivery.
2337 * @param t Tunnel on which to empty the message buffer.
2340 tunnel_send_client_buffered_ucast (struct MeshTunnel *t)
2342 struct MeshTunnelReliability *rel;
2343 struct MeshReliableMessage *copy;
2344 struct MeshReliableMessage *next;
2346 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_unicast\n");
2348 for (copy = rel->head_recv; NULL != copy; copy = next)
2351 if (copy->mid == rel->mid_recv)
2353 struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
2355 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2356 " have %llu! now expecting %llu\n",
2357 copy->mid, rel->mid_recv + 1LL);
2358 tunnel_send_client_ucast (t, msg);
2360 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2365 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2366 " don't have %llu, (%llu)\n",
2372 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_unicast END\n");
2377 * We have received a message out of order, buffer it until we receive
2378 * the missing one and we can feed the rest to the client.
2381 tunnel_add_buffer_ucast (struct MeshTunnel *t,
2382 const struct GNUNET_MESH_Data *msg)
2384 struct MeshTunnelReliability *rel;
2385 struct MeshReliableMessage *copy;
2386 struct MeshReliableMessage *prev;
2391 size = ntohs (msg->header.size);
2392 mid = GNUNET_ntohll (msg->mid);
2393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffer_ucast %llu\n", mid);
2395 copy = GNUNET_malloc (sizeof (*copy) + size);
2398 memcpy (©[1], msg, size);
2400 // FIXME do something better than O(n), although n < 64...
2401 for (prev = rel->head_recv; NULL != prev; prev = prev->next)
2403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %llu\n", prev->mid);
2404 if (mid < prev->mid)
2406 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n");
2407 GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv,
2412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n");
2413 GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy);
2414 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffer_ucast END\n");
2419 * Mark future messages as ACK'd.
2421 * @param t Tunnel whose sent buffer to clean.
2422 * @param msg DataACK message with a bitfield of future ACK'd messages.
2425 tunnel_free_buffer_ucast (struct MeshTunnel *t,
2426 const struct GNUNET_MESH_DataACK *msg)
2428 struct MeshTunnelReliability *rel;
2429 struct MeshReliableMessage *copy;
2430 struct MeshReliableMessage *next;
2437 bitfield = msg->futures;
2438 mid = GNUNET_ntohll (msg->mid);
2440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2441 "free_sent_buffer %llu %llX\n",
2443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2444 " rel %p, head %p\n",
2445 rel, rel->head_sent);
2446 for (i = 0, copy = rel->head_sent;
2447 i < 64 && NULL != copy && 0 != bitfield;
2450 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2451 " trying bit %u (mid %llu)\n",
2454 if (0 == (bitfield & mask))
2457 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n");
2458 /* Bit was set, clear the bit from the bitfield */
2461 /* The i-th bit was set. Do we have that copy? */
2462 /* Skip copies with mid < target */
2463 target = mid + i + 1;
2464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %llu\n", target);
2465 while (NULL != copy && copy->mid < target)
2468 /* Did we run out of copies? (previously freed, it's ok) */
2471 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n");
2475 /* Did we overshoot the target? (previously freed, it's ok) */
2476 if (copy->mid > target)
2478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %llu\n", copy->mid);
2482 /* Now copy->mid == target, free it */
2483 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %llu\n", target);
2485 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_buffer END\n");
2494 * Modify the to_origin message TID from global to local and send to client.
2496 * @param t Tunnel on which to send the message.
2497 * @param msg Message to modify and send.
2500 tunnel_send_client_to_orig (struct MeshTunnel *t,
2501 const struct GNUNET_MESH_Data *msg)
2503 tunnel_send_client_data (t, msg, t->owner, t->local_tid);
2508 * We haven't received an ACK after a certain time: restransmit the message.
2510 * @param cls Closure (MeshReliableMessage with the message to restransmit)
2511 * @param tc TaskContext.
2514 tunnel_retransmit_message (void *cls,
2515 const struct GNUNET_SCHEDULER_TaskContext *tc)
2517 struct MeshTunnelReliability *rel = cls;
2518 struct MeshReliableMessage *copy;
2519 struct MeshFlowControl *fc;
2520 struct MeshPeerQueue *q;
2521 struct MeshPeerInfo *pi;
2522 struct MeshTunnel *t;
2523 struct GNUNET_MESH_Data *payload;
2526 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
2527 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2531 copy = rel->head_sent;
2538 /* Search the message to be retransmitted in the outgoing queue */
2539 payload = (struct GNUNET_MESH_Data *) ©[1];
2540 hop = rel == t->fwd_rel ? t->next_hop : t->prev_hop;
2541 fc = rel == t->fwd_rel ? &t->prev_fc : &t->next_fc;
2542 pi = peer_get_short (hop);
2543 for (q = pi->queue_head; NULL != q; q = q->next)
2545 if (ntohs (payload->header.type) == q->type)
2547 struct GNUNET_MESH_Data *queued_data = q->cls;
2549 if (queued_data->mid == payload->mid)
2554 /* Message not found in the queue */
2557 struct GNUNET_TIME_Relative diff;
2559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %llu\n", copy->mid);
2560 diff = GNUNET_TIME_absolute_get_duration (copy->timestamp);
2561 diff = GNUNET_TIME_relative_divide (diff, 10);
2562 copy->timestamp = GNUNET_TIME_absolute_subtract (GNUNET_TIME_absolute_get(),
2565 fc->last_ack_sent++;
2566 payload->pid = htonl (fc->last_pid_recv + 1);
2567 fc->last_pid_recv++;
2568 send_prebuilt_message (&payload->header, hop, t);
2569 GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
2573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! STILL IN QUEUE %llu\n", copy->mid);
2576 rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer);
2577 rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
2578 &tunnel_retransmit_message,
2584 * @brief Re-initiate traffic to this peer if necessary.
2586 * Check if there is traffic queued towards this peer
2587 * and the core transmit handle is NULL (traffic was stalled).
2588 * If so, call core tmt rdy.
2590 * @param peer_id Short ID of peer to which initiate traffic.
2593 peer_unlock_queue(GNUNET_PEER_Id peer_id)
2595 struct MeshPeerInfo *peer;
2596 struct GNUNET_PeerIdentity id;
2597 struct MeshPeerQueue *q;
2600 peer = peer_get_short (peer_id);
2601 if (NULL != peer->core_transmit)
2604 q = queue_get_next (peer);
2607 /* Might br multicast traffic already sent to this particular peer but
2608 * not to other children in this tunnel.
2609 * This way t->queue_n would be > 0 but the queue of this particular peer
2615 GNUNET_PEER_resolve (peer->id, &id);
2616 peer->core_transmit =
2617 GNUNET_CORE_notify_transmit_ready(core_handle,
2620 GNUNET_TIME_UNIT_FOREVER_REL,
2630 * Send a message to all peers and clients in this tunnel that the tunnel
2631 * is no longer valid. If some peer or client should not receive the message,
2632 * should be zero'ed out before calling this function.
2634 * @param t The tunnel whose peers and clients to notify.
2637 tunnel_send_destroy (struct MeshTunnel *t)
2639 struct GNUNET_MESH_TunnelDestroy msg;
2640 struct GNUNET_PeerIdentity id;
2642 msg.header.size = htons (sizeof (msg));
2643 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2644 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2645 msg.tid = htonl (t->id.tid);
2646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2647 " sending tunnel destroy for tunnel: %s [%X]\n",
2648 GNUNET_i2s (&msg.oid), t->id.tid);
2650 if (NULL == t->client && 0 != t->next_hop)
2652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2653 GNUNET_PEER_resolve (t->next_hop, &id);
2654 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2655 " sending forward to %s\n",
2657 send_prebuilt_message (&msg.header, t->next_hop, t);
2659 if (NULL == t->owner && 0 != t->prev_hop)
2661 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2662 GNUNET_PEER_resolve (t->prev_hop, &id);
2663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2664 " sending back to %s\n",
2666 send_prebuilt_message (&msg.header, t->prev_hop, t);
2668 if (NULL != t->owner)
2670 send_client_tunnel_destroy (t->owner, t);
2672 if (NULL != t->client)
2674 send_client_tunnel_destroy (t->client, t);
2680 * Cancel all transmissions towards a neighbor that belongs to a certain tunnel.
2682 * @param t Tunnel which to cancel.
2683 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
2686 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
2688 struct MeshPeerInfo *peer_info;
2689 struct MeshPeerQueue *pq;
2690 struct MeshPeerQueue *next;
2693 return; /* Was local peer, 0'ed in tunnel_destroy_iterator */
2694 peer_info = peer_get_short (neighbor);
2695 for (pq = peer_info->queue_head; NULL != pq; pq = next)
2698 if (pq->tunnel == t)
2700 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
2701 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
2703 /* Should have been removed on destroy children */
2706 queue_destroy (pq, GNUNET_YES);
2709 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
2711 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
2712 peer_info->core_transmit = NULL;
2718 * Destroy the tunnel.
2720 * This function does not generate any warning traffic to clients or peers.
2723 * Remove the tunnel from peer_info's and clients' hashmaps.
2724 * Cancel messages belonging to this tunnel queued to neighbors.
2725 * Free any allocated resources linked to the tunnel.
2727 * @param t the tunnel to destroy
2729 * @return GNUNET_OK on success
2732 tunnel_destroy (struct MeshTunnel *t)
2734 struct MeshClient *c;
2735 struct GNUNET_HashCode hash;
2745 struct GNUNET_PeerIdentity id;
2747 GNUNET_PEER_resolve (t->id.oid, &id);
2748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
2749 GNUNET_i2s (&id), t->id.tid);
2751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
2755 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2756 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
2765 GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels, t->local_tid, t))
2772 if (NULL != t->client)
2776 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
2777 t->local_tid_dest, t))
2783 GNUNET_CONTAINER_multihashmap32_remove (incoming_tunnels,
2784 t->local_tid_dest, t))
2791 if (0 != t->prev_hop)
2793 peer_cancel_queues (t->prev_hop, t);
2794 GNUNET_PEER_change_rc (t->prev_hop, -1);
2796 if (0 != t->next_hop)
2798 peer_cancel_queues (t->next_hop, t);
2799 GNUNET_PEER_change_rc (t->next_hop, -1);
2802 peer_info_remove_tunnel (peer_get_short (t->dest), t);
2805 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
2806 GNUNET_SCHEDULER_cancel (t->maintenance_task);
2809 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
2810 path_destroy (t->path);
2816 * Tunnel is empty: destroy it.
2818 * Notifies all participants (peers, cleints) about the destruction.
2820 * @param t Tunnel to destroy.
2823 tunnel_destroy_empty (struct MeshTunnel *t)
2827 struct GNUNET_PeerIdentity id;
2829 GNUNET_PEER_resolve (t->id.oid, &id);
2830 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2831 "executing destruction of empty tunnel %s [%X]\n",
2832 GNUNET_i2s (&id), t->id.tid);
2836 if (GNUNET_NO == t->destroy)
2837 tunnel_send_destroy (t);
2838 if (0 == t->pending_messages)
2841 t->destroy = GNUNET_YES;
2845 * Initialize a Flow Control structure to the initial state.
2847 * @param fc Flow Control structure to initialize.
2850 fc_init (struct MeshFlowControl *fc)
2852 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
2853 fc->last_pid_recv = (uint32_t) -1;
2854 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
2855 fc->last_ack_recv = (uint32_t) -1;
2856 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2857 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
2862 * Create a new tunnel
2864 * @param owner Who is the owner of the tunnel (short ID).
2865 * @param tid Tunnel Number of the tunnel.
2866 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
2867 * @param local Tunnel Number for the tunnel, for the client point of view.
2869 * @return A new initialized tunnel. NULL on error.
2871 static struct MeshTunnel *
2872 tunnel_new (GNUNET_PEER_Id owner,
2873 MESH_TunnelNumber tid,
2874 struct MeshClient *client,
2875 MESH_TunnelNumber local)
2877 struct MeshTunnel *t;
2878 struct GNUNET_HashCode hash;
2880 if (n_tunnels >= max_tunnels && NULL == client)
2883 t = GNUNET_malloc (sizeof (struct MeshTunnel));
2886 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
2888 fc_init (&t->next_fc);
2889 fc_init (&t->prev_fc);
2890 t->local_tid = local;
2892 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
2894 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
2896 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
2897 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2904 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2912 GNUNET_CONTAINER_multihashmap32_put (client->own_tunnels,
2914 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
2918 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
2928 * Set options in a tunnel, extracted from a bit flag field
2930 * @param t Tunnel to set options to.
2931 * @param options Bit array in host byte order.
2934 tunnel_set_options (struct MeshTunnel *t, uint32_t options)
2936 t->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
2937 GNUNET_YES : GNUNET_NO;
2938 t->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
2939 GNUNET_YES : GNUNET_NO;
2944 * Iterator for deleting each tunnel whose client endpoint disconnected.
2946 * @param cls Closure (client that has disconnected).
2947 * @param key The local tunnel id (used to access the hashmap).
2948 * @param value The value stored at the key (tunnel to destroy).
2950 * @return GNUNET_OK, keep iterating.
2953 tunnel_destroy_iterator (void *cls,
2957 struct MeshTunnel *t = value;
2958 struct MeshClient *c = cls;
2960 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2961 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
2962 t->local_tid, t->local_tid_dest, c->id);
2963 client_delete_tunnel (c, t);
2966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
2968 if (0 != t->next_hop) { /* destroy could come before a path is used */
2969 GNUNET_PEER_change_rc (t->next_hop, -1);
2975 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
2977 if (0 != t->prev_hop) { /* destroy could come before a path is used */
2978 GNUNET_PEER_change_rc (t->prev_hop, -1);
2983 tunnel_destroy_empty (t);
2990 * Timeout function, destroys tunnel if called
2992 * @param cls Closure (tunnel to destroy).
2993 * @param tc TaskContext
2996 tunnel_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2998 struct MeshTunnel *t = cls;
2999 struct GNUNET_PeerIdentity id;
3001 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3002 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3004 GNUNET_PEER_resolve(t->id.oid, &id);
3005 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3006 "Tunnel %s [%X] timed out. Destroying.\n",
3007 GNUNET_i2s(&id), t->id.tid);
3008 if (NULL != t->client)
3009 send_client_tunnel_destroy (t->client, t);
3010 tunnel_destroy (t); /* Do not notify other */
3015 * Resets the tunnel timeout. Starts it if no timeout was running.
3017 * @param t Tunnel whose timeout to reset.
3019 * TODO use heap to improve efficiency of scheduler.
3022 tunnel_reset_timeout (struct MeshTunnel *t)
3024 if (NULL != t->owner || 0 != t->local_tid || 0 == t->prev_hop)
3026 if (GNUNET_SCHEDULER_NO_TASK != t->maintenance_task)
3027 GNUNET_SCHEDULER_cancel (t->maintenance_task);
3028 t->maintenance_task =
3029 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3030 (refresh_path_time, 4), &tunnel_timeout, t);
3034 /******************************************************************************/
3035 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3036 /******************************************************************************/
3039 * Function to send a create path packet to a peer.
3041 * @param cls closure
3042 * @param size number of bytes available in buf
3043 * @param buf where the callee should write the message
3044 * @return number of bytes written to buf
3047 send_core_path_create (void *cls, size_t size, void *buf)
3049 struct MeshTunnel *t = cls;
3050 struct GNUNET_MESH_CreateTunnel *msg;
3051 struct GNUNET_PeerIdentity *peer_ptr;
3052 struct MeshPeerPath *p = t->path;
3057 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
3059 sizeof (struct GNUNET_MESH_CreateTunnel) +
3060 p->length * sizeof (struct GNUNET_PeerIdentity);
3062 if (size < size_needed || NULL == buf)
3067 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
3068 msg->header.size = htons (size_needed);
3069 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
3070 msg->tid = ntohl (t->id.tid);
3073 if (GNUNET_YES == t->nobuffer)
3074 opt |= GNUNET_MESH_OPTION_NOBUFFER;
3075 if (GNUNET_YES == t->reliable)
3076 opt |= GNUNET_MESH_OPTION_RELIABLE;
3077 msg->opt = htonl (opt);
3078 msg->port = htonl (t->port);
3080 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
3081 for (i = 0; i < p->length; i++)
3083 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
3086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3087 "CREATE PATH (%u bytes long) sent!\n", size_needed);
3093 * Creates a path ack message in buf and frees all unused resources.
3095 * @param cls closure (MeshTransmissionDescriptor)
3096 * @param size number of bytes available in buf
3097 * @param buf where the callee should write the message
3098 * @return number of bytes written to buf
3101 send_core_path_ack (void *cls, size_t size, void *buf)
3103 struct MeshTunnel *t = cls;
3104 struct GNUNET_MESH_PathACK *msg = buf;
3106 GNUNET_assert (NULL != t);
3107 if (sizeof (struct GNUNET_MESH_PathACK) > size)
3112 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
3113 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
3114 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3115 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
3116 msg->tid = htonl (t->id.tid);
3117 msg->peer_id = my_full_id;
3118 msg->ack = htonl (t->prev_fc.last_ack_sent);
3120 /* TODO add signature */
3122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
3123 return sizeof (struct GNUNET_MESH_PathACK);
3128 * Free a transmission that was already queued with all resources
3129 * associated to the request.
3131 * @param queue Queue handler to cancel.
3132 * @param clear_cls Is it necessary to free associated cls?
3135 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3137 struct MeshFlowControl *fc;
3139 if (GNUNET_YES == clear_cls)
3141 switch (queue->type)
3143 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3144 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3145 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3147 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3148 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3149 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3150 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3151 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
3152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3153 " prebuilt message\n");
3154 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3156 GNUNET_MESH_DEBUG_M2S (queue->type));
3158 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3163 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3164 " type %s unknown!\n",
3165 GNUNET_MESH_DEBUG_M2S (queue->type));
3167 GNUNET_free_non_null (queue->cls);
3169 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3170 queue->peer->queue_tail,
3173 /* Delete from appropriate fc in the tunnel */
3174 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type ||
3175 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type )
3177 if (queue->peer->id == queue->tunnel->prev_hop)
3178 fc = &queue->tunnel->prev_fc;
3179 else if (queue->peer->id == queue->tunnel->next_hop)
3180 fc = &queue->tunnel->next_fc;
3184 GNUNET_free (queue);
3189 GNUNET_free (queue);
3194 * @brief Get the next transmittable message from the queue.
3196 * This will be the head, except in the case of being a data packet
3197 * not allowed by the destination peer.
3199 * @param peer Destination peer.
3201 * @return The next viable MeshPeerQueue element to send to that peer.
3202 * NULL when there are no transmittable messages.
3204 struct MeshPeerQueue *
3205 queue_get_next (const struct MeshPeerInfo *peer)
3207 struct MeshPeerQueue *q;
3209 struct GNUNET_MESH_Data *dmsg;
3210 struct MeshTunnel* t;
3214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
3215 for (q = peer->queue_head; NULL != q; q = q->next)
3218 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3220 GNUNET_MESH_DEBUG_M2S (q->type));
3221 dmsg = (struct GNUNET_MESH_Data *) q->cls;
3222 pid = ntohl (dmsg->pid);
3225 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3226 ack = t->next_fc.last_ack_recv;
3228 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3229 ack = t->prev_fc.last_ack_recv;
3232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3237 "* ACK: %u, PID: %u, MID: %llu\n",
3238 ack, pid, GNUNET_ntohll (dmsg->mid));
3239 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
3241 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3247 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3252 "* nothing found\n");
3258 queue_send (void *cls, size_t size, void *buf)
3260 struct MeshPeerInfo *peer = cls;
3261 struct GNUNET_MessageHeader *msg;
3262 struct MeshPeerQueue *queue;
3263 struct MeshTunnel *t;
3264 struct GNUNET_PeerIdentity dst_id;
3265 struct MeshFlowControl *fc;
3270 peer->core_transmit = NULL;
3272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
3273 queue = queue_get_next (peer);
3275 /* Queue has no internal mesh traffic nor sendable payload */
3278 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
3279 if (NULL == peer->queue_head)
3280 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
3283 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
3285 GNUNET_PEER_resolve (peer->id, &dst_id);
3286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3288 GNUNET_i2s (&dst_id));
3289 /* Check if buffer size is enough for the message */
3290 if (queue->size > size)
3292 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3293 "* not enough room, reissue\n");
3294 peer->core_transmit =
3295 GNUNET_CORE_notify_transmit_ready (core_handle,
3298 GNUNET_TIME_UNIT_FOREVER_REL,
3305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
3308 GNUNET_assert (0 < t->pending_messages);
3309 t->pending_messages--;
3313 switch (queue->type)
3316 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3317 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3318 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3319 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3320 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3321 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3322 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3323 case GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE:
3324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3326 GNUNET_MESH_DEBUG_M2S (queue->type));
3328 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3329 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3330 data_size = send_core_data_raw (queue->cls, size, buf);
3331 msg = (struct GNUNET_MessageHeader *) buf;
3332 type = ntohs (msg->type);
3334 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
3336 data_size = send_core_path_create (queue->cls, size, buf);
3338 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3339 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
3340 data_size = send_core_path_ack (queue->cls, size, buf);
3344 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3345 "* type unknown: %u\n",
3350 if (0 < drop_percent &&
3351 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
3353 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3354 "Dropping message of type %s\n",
3355 GNUNET_MESH_DEBUG_M2S(queue->type));
3358 /* Free queue, but cls was freed by send_core_* */
3359 queue_destroy (queue, GNUNET_NO);
3361 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
3362 pid = ((struct GNUNET_MESH_Data *) buf)->pid;
3366 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3367 t->next_fc.last_pid_sent = pid;
3368 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
3370 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3371 t->prev_fc.last_pid_sent = pid;
3372 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
3378 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
3384 /* If more data in queue, send next */
3385 queue = queue_get_next (peer);
3388 struct GNUNET_PeerIdentity id;
3390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
3391 GNUNET_PEER_resolve (peer->id, &id);
3392 peer->core_transmit =
3393 GNUNET_CORE_notify_transmit_ready(core_handle,
3396 GNUNET_TIME_UNIT_FOREVER_REL,
3402 else if (NULL != peer->queue_head)
3404 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3406 GNUNET_i2s (&my_full_id));
3407 if (peer->id == t->next_hop)
3409 else if (peer->id == t->prev_hop)
3416 if (NULL != fc && GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
3419 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3423 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
3429 * @brief Queue and pass message to core when possible.
3431 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3432 * accounts for it. In case the queue is full, the message is dropped and
3435 * Otherwise, message is treated as internal and allowed to go regardless of
3438 * @param cls Closure (@c type dependant). It will be used by queue_send to
3439 * build the message to be sent if not already prebuilt.
3440 * @param type Type of the message, 0 for a raw message.
3441 * @param size Size of the message.
3442 * @param dst Neighbor to send message to.
3443 * @param t Tunnel this message belongs to.
3446 queue_add (void *cls, uint16_t type, size_t size,
3447 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3449 struct MeshPeerQueue *queue;
3450 struct GNUNET_PeerIdentity id;
3451 struct MeshFlowControl *fc;
3455 priority = GNUNET_NO;
3456 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3460 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3466 if (fc->queue_n >= t->queue_max)
3468 /* If this isn't a retransmission, drop the message */
3469 if (GNUNET_NO == t->reliable ||
3470 (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) ||
3471 (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type))
3473 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
3476 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3477 "queue full: %u/%u\n",
3478 fc->queue_n, t->queue_max);
3479 return; /* Drop this message */
3481 priority = GNUNET_YES;
3485 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3491 if (GNUNET_YES == priority)
3493 struct GNUNET_MESH_Data *d;
3497 GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue);
3498 d = (struct GNUNET_MESH_Data *) queue->cls;
3500 for (queue = dst->queue_tail; NULL != queue; queue = queue->prev)
3502 if (queue->type != type)
3504 d = (struct GNUNET_MESH_Data *) queue->cls;
3511 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3512 if (NULL == dst->core_transmit)
3514 GNUNET_PEER_resolve (dst->id, &id);
3515 dst->core_transmit =
3516 GNUNET_CORE_notify_transmit_ready (core_handle,
3519 GNUNET_TIME_UNIT_FOREVER_REL,
3525 t->pending_messages++;
3529 /******************************************************************************/
3530 /******************** MESH NETWORK HANDLERS **************************/
3531 /******************************************************************************/
3535 * Core handler for path creation
3537 * @param cls closure
3538 * @param message message
3539 * @param peer peer identity this notification is about
3541 * @return GNUNET_OK to keep the connection open,
3542 * GNUNET_SYSERR to close it (signal serious error)
3545 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3546 const struct GNUNET_MessageHeader *message)
3548 unsigned int own_pos;
3551 MESH_TunnelNumber tid;
3552 struct GNUNET_MESH_CreateTunnel *msg;
3553 struct GNUNET_PeerIdentity *pi;
3554 struct MeshPeerPath *path;
3555 struct MeshPeerInfo *dest_peer_info;
3556 struct MeshPeerInfo *orig_peer_info;
3557 struct MeshTunnel *t;
3559 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3560 "Received a path create msg [%s]\n",
3561 GNUNET_i2s (&my_full_id));
3562 size = ntohs (message->size);
3563 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3565 GNUNET_break_op (0);
3569 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3570 if (size % sizeof (struct GNUNET_PeerIdentity))
3572 GNUNET_break_op (0);
3575 size /= sizeof (struct GNUNET_PeerIdentity);
3578 GNUNET_break_op (0);
3581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3582 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3584 tid = ntohl (msg->tid);
3585 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3586 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3587 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
3588 t = tunnel_get (pi, tid);
3589 if (NULL == t) /* might be a local tunnel */
3593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3594 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3600 t->port = ntohl (msg->port);
3601 opt = ntohl (msg->opt);
3602 if (0 != (opt & GNUNET_MESH_OPTION_NOBUFFER))
3604 t->nobuffer = GNUNET_YES;
3607 if (0 != (opt & GNUNET_MESH_OPTION_RELIABLE))
3609 t->reliable = GNUNET_YES;
3611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3613 tunnel_reset_timeout (t);
3615 t->state = MESH_TUNNEL_WAITING;
3617 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3618 if (NULL == dest_peer_info)
3620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3621 " Creating PeerInfo for destination.\n");
3622 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3623 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3624 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3626 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3628 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3629 if (NULL == orig_peer_info)
3631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3632 " Creating PeerInfo for origin.\n");
3633 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3634 orig_peer_info->id = GNUNET_PEER_intern (pi);
3635 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3636 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3639 path = path_new (size);
3641 for (i = 0; i < size; i++)
3643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3644 GNUNET_i2s (&pi[i]));
3645 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3646 if (path->peers[i] == myid)
3649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3650 if (own_pos == 0 && path->peers[own_pos] != myid)
3652 /* create path: self not found in path through self */
3653 GNUNET_break_op (0);
3654 path_destroy (path);
3658 path_add_to_peers (path, GNUNET_NO);
3659 tunnel_use_path (t, path);
3661 peer_info_add_tunnel (dest_peer_info, t);
3663 if (own_pos == size - 1)
3665 struct MeshClient *c;
3667 /* Find target client */
3668 c = GNUNET_CONTAINER_multihashmap32_get (ports, t->port);
3671 /* TODO send reject */
3675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3676 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3678 /* Assign local tid */
3679 while (NULL != tunnel_get_incoming (next_local_tid))
3680 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3681 t->local_tid_dest = next_local_tid++;
3682 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3684 if (GNUNET_YES == t->reliable)
3686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
3687 t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
3689 t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
3692 tunnel_add_client (t, c);
3693 send_client_tunnel_create (t);
3698 struct MeshPeerPath *path2;
3700 t->next_hop = path->peers[own_pos + 1];
3701 GNUNET_PEER_change_rc(t->next_hop, 1);
3703 /* It's for somebody else! Retransmit. */
3704 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3705 path2 = path_duplicate (path);
3706 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3707 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3708 send_create_path (t);
3716 * Core handler for path ACKs
3718 * @param cls closure
3719 * @param message message
3720 * @param peer peer identity this notification is about
3722 * @return GNUNET_OK to keep the connection open,
3723 * GNUNET_SYSERR to close it (signal serious error)
3726 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
3727 const struct GNUNET_MessageHeader *message)
3729 struct GNUNET_MESH_PathACK *msg;
3730 struct MeshPeerInfo *peer_info;
3731 struct MeshPeerPath *p;
3732 struct MeshTunnel *t;
3734 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
3735 GNUNET_i2s (&my_full_id));
3736 msg = (struct GNUNET_MESH_PathACK *) message;
3737 t = tunnel_get (&msg->oid, ntohl(msg->tid));
3740 /* TODO notify that we don't know the tunnel */
3741 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
3742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
3743 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
3747 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
3749 peer_info = peer_get (&msg->peer_id);
3750 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
3751 GNUNET_i2s (&msg->peer_id));
3752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
3755 /* Add path to peers? */
3759 path_add_to_peers (p, GNUNET_YES);
3765 t->state = MESH_TUNNEL_READY;
3766 t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0;
3767 t->prev_fc.last_ack_sent = ntohl (msg->ack);
3769 /* Message for us? */
3770 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
3772 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3773 if (NULL == t->owner)
3775 GNUNET_break_op (0);
3778 if (NULL != peer_info->dhtget)
3780 GNUNET_DHT_get_stop (peer_info->dhtget);
3781 peer_info->dhtget = NULL;
3783 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3784 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
3788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3789 " not for us, retransmitting...\n");
3790 peer_info = peer_get (&msg->oid);
3791 send_prebuilt_message (message, t->prev_hop, t);
3797 * Core handler for notifications of broken paths
3799 * @param cls closure
3800 * @param message message
3801 * @param peer peer identity this notification is about
3803 * @return GNUNET_OK to keep the connection open,
3804 * GNUNET_SYSERR to close it (signal serious error)
3807 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
3808 const struct GNUNET_MessageHeader *message)
3810 struct GNUNET_MESH_PathBroken *msg;
3811 struct MeshTunnel *t;
3813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3814 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
3815 msg = (struct GNUNET_MESH_PathBroken *) message;
3816 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3817 GNUNET_i2s (&msg->peer1));
3818 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
3819 GNUNET_i2s (&msg->peer2));
3820 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3823 GNUNET_break_op (0);
3826 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
3827 GNUNET_PEER_search (&msg->peer2));
3834 * Core handler for tunnel destruction
3836 * @param cls closure
3837 * @param message message
3838 * @param peer peer identity this notification is about
3840 * @return GNUNET_OK to keep the connection open,
3841 * GNUNET_SYSERR to close it (signal serious error)
3844 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
3845 const struct GNUNET_MessageHeader *message)
3847 struct GNUNET_MESH_TunnelDestroy *msg;
3848 struct MeshTunnel *t;
3850 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
3851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3852 "Got a TUNNEL DESTROY packet from %s\n",
3854 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3855 " for tunnel %s [%u]\n",
3856 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
3857 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3860 /* Probably already got the message from another path,
3861 * destroyed the tunnel and retransmitted to children.
3864 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
3868 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
3870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
3871 t->local_tid, t->local_tid_dest);
3873 if (GNUNET_PEER_search (peer) == t->prev_hop)
3875 // TODO check owner's signature
3876 // TODO add owner's signatue to tunnel for retransmission
3877 peer_cancel_queues (t->prev_hop, t);
3878 GNUNET_PEER_change_rc (t->prev_hop, -1);
3881 else if (GNUNET_PEER_search (peer) == t->next_hop)
3883 // TODO check dest's signature
3884 // TODO add dest's signatue to tunnel for retransmission
3885 peer_cancel_queues (t->next_hop, t);
3886 GNUNET_PEER_change_rc (t->next_hop, -1);
3891 GNUNET_break_op (0);
3892 // TODO check both owner AND destination's signature to see which matches
3893 // TODO restransmit in appropriate direction
3896 tunnel_destroy_empty (t);
3898 // TODO: add timeout to destroy the tunnel anyway
3904 * Core handler for mesh network traffic going from the origin to a peer
3906 * @param cls closure
3907 * @param peer peer identity this notification is about
3908 * @param message message
3909 * @return GNUNET_OK to keep the connection open,
3910 * GNUNET_SYSERR to close it (signal serious error)
3913 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
3914 const struct GNUNET_MessageHeader *message)
3916 struct GNUNET_MESH_Data *msg;
3917 struct MeshTunnel *t;
3922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a unicast packet from %s\n",
3925 size = ntohs (message->size);
3927 sizeof (struct GNUNET_MESH_Data) +
3928 sizeof (struct GNUNET_MessageHeader))
3933 msg = (struct GNUNET_MESH_Data *) message;
3934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
3935 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
3937 t = tunnel_get (&msg->oid, ntohl (msg->tid));
3940 /* TODO notify back: we don't know this tunnel */
3941 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
3942 GNUNET_break_op (0);
3945 pid = ntohl (msg->pid);
3946 if (GMC_is_pid_bigger (pid, t->prev_fc.last_ack_sent))
3948 GNUNET_STATISTICS_update (stats, "# unsolicited unicast", 1, GNUNET_NO);
3949 GNUNET_break_op (0);
3950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3951 "Received PID %u, (prev %u), ACK %u\n",
3952 pid, t->prev_fc.last_pid_recv, t->prev_fc.last_ack_sent);
3953 tunnel_send_fwd_ack(t, GNUNET_MESSAGE_TYPE_MESH_POLL);
3957 tunnel_reset_timeout (t);
3958 if (t->dest == myid)
3960 /* TODO signature verification */
3961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3962 " it's for us! sending to clients...\n");
3963 GNUNET_STATISTICS_update (stats, "# unicast received", 1, GNUNET_NO);
3964 // if (GMC_is_pid_bigger(pid, t->prev_fc.last_pid_recv)) FIXME use
3965 if (GMC_is_pid_bigger (pid, t->prev_fc.last_pid_recv))
3969 mid = GNUNET_ntohll (msg->mid);
3970 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3971 " pid %u (%llu) not seen yet\n", pid, mid);
3972 t->prev_fc.last_pid_recv = pid;
3974 if (GNUNET_NO == t->reliable ||
3975 (mid >= t->bck_rel->mid_recv && mid <= t->bck_rel->mid_recv + 64))
3977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3978 "!!! RECV %llu\n", GNUNET_ntohll(msg->mid));
3979 if (GNUNET_YES == t->reliable)
3981 /* Is this the exact next expected messasge? */
3982 if (mid == t->bck_rel->mid_recv)
3984 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
3985 t->bck_rel->mid_recv++;
3986 tunnel_send_client_ucast (t, msg);
3987 tunnel_send_client_buffered_ucast (t);
3991 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
3992 tunnel_add_buffer_ucast (t, msg);
3998 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3999 " MID %llu not expected (%llu - %llu), dropping!\n",
4000 GNUNET_ntohll (msg->mid),
4001 t->bck_rel->mid_recv, t->bck_rel->mid_recv + 64LL);
4006 // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
4007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4008 " Pid %u not expected (%u), dropping!\n",
4009 pid, t->prev_fc.last_pid_recv + 1);
4011 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
4014 t->prev_fc.last_pid_recv = pid;
4015 if (0 == t->next_hop)
4020 ttl = ntohl (msg->ttl);
4021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4024 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4025 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4026 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4030 " not for us, retransmitting...\n");
4032 send_prebuilt_message (message, t->next_hop, t);
4033 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4039 * Core handler for mesh network traffic toward the owner of a tunnel
4041 * @param cls closure
4042 * @param message message
4043 * @param peer peer identity this notification is about
4045 * @return GNUNET_OK to keep the connection open,
4046 * GNUNET_SYSERR to close it (signal serious error)
4049 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4050 const struct GNUNET_MessageHeader *message)
4052 struct GNUNET_MESH_Data *msg;
4053 struct MeshTunnel *t;
4058 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a ToOrigin packet from %s\n",
4060 size = ntohs (message->size);
4061 if (size < sizeof (struct GNUNET_MESH_Data) + /* Payload must be */
4062 sizeof (struct GNUNET_MessageHeader)) /* at least a header */
4064 GNUNET_break_op (0);
4067 msg = (struct GNUNET_MESH_Data *) message;
4068 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " of type %s\n",
4069 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
4070 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4071 pid = ntohl (msg->pid);
4074 /* TODO notify that we dont know this tunnel (whom)? */
4075 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4077 "Received to_origin with PID %u on unknown tunnel %s [%u]\n",
4078 pid, GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4082 if (GMC_is_pid_bigger (pid, t->next_fc.last_ack_sent))
4084 GNUNET_STATISTICS_update (stats, "# unsolicited to_orig", 1, GNUNET_NO);
4085 GNUNET_break_op (0);
4086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4087 "Received PID %u, ACK %u\n",
4088 pid, t->next_fc.last_ack_sent);
4089 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
4093 if (myid == t->id.oid)
4095 /* TODO signature verification */
4096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4097 " it's for us! sending to clients...\n");
4098 GNUNET_STATISTICS_update (stats, "# to origin received", 1, GNUNET_NO);
4099 if ( (GNUNET_NO == t->reliable &&
4100 GMC_is_pid_bigger(pid, t->next_fc.last_pid_recv))
4102 (GNUNET_YES == t->reliable &&
4103 pid == t->next_fc.last_pid_recv + 1) ) // FIXME use "futures" as accepting
4105 t->next_fc.last_pid_recv = pid;
4106 tunnel_send_client_to_orig (t, msg);
4110 // GNUNET_STATISTICS_update (stats, "# duplicate PID drops BCK", 1, GNUNET_NO);
4111 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4112 " Pid %u not expected, sending FWD ACK!\n", pid);
4114 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4118 " not for us, retransmitting...\n");
4119 t->next_fc.last_pid_recv = pid;
4120 if (0 == t->prev_hop) /* No owner AND no prev hop */
4122 if (GNUNET_YES == t->destroy)
4124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4125 "to orig received on a dying tunnel %s [%X]\n",
4126 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4129 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4130 "unknown to origin at %s\n",
4131 GNUNET_i2s (&my_full_id));
4132 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4135 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
4136 "on tunnel %s [%X]\n",
4137 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4140 ttl = ntohl (msg->ttl);
4141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4144 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4145 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4146 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4149 send_prebuilt_message (message, t->prev_hop, t);
4150 GNUNET_STATISTICS_update (stats, "# to origin forwarded", 1, GNUNET_NO);
4157 * Core handler for mesh network traffic end-to-end ACKs.
4159 * @param cls Closure.
4160 * @param message Message.
4161 * @param peer Peer identity this notification is about.
4163 * @return GNUNET_OK to keep the connection open,
4164 * GNUNET_SYSERR to close it (signal serious error)
4167 handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4168 const struct GNUNET_MessageHeader *message)
4170 struct GNUNET_MESH_DataACK *msg;
4171 struct MeshTunnelReliability *rel;
4172 struct MeshReliableMessage *copy;
4173 struct MeshReliableMessage *next;
4174 struct MeshTunnel *t;
4180 type = ntohs (message->type);
4181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message from %s!\n",
4182 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4183 msg = (struct GNUNET_MESH_DataACK *) message;
4185 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4188 /* TODO notify that we dont know this tunnel (whom)? */
4189 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4192 ack = GNUNET_ntohll (msg->mid);
4193 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %llu\n", ack);
4195 /* Is this a forward or backward ACK? */
4196 id = GNUNET_PEER_search (peer);
4197 if (t->next_hop == id && GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type)
4199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4200 if (NULL == t->owner)
4202 send_prebuilt_message (message, t->prev_hop, t);
4206 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST);
4208 else if (t->prev_hop == id && GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK == type)
4210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4211 if (NULL == t->client)
4213 send_prebuilt_message (message, t->next_hop, t);
4217 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
4221 GNUNET_break_op (0);
4225 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %llu\n", ack);
4226 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
4228 struct GNUNET_TIME_Relative time;
4230 if (copy->mid > ack)
4232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %llu, out!\n", copy->mid);
4233 tunnel_free_buffer_ucast (t, msg);
4237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %llu\n", copy->mid);
4239 time = GNUNET_TIME_absolute_get_duration (copy->timestamp);
4240 rel->expected_delay.rel_value += time.rel_value;
4241 rel->expected_delay.rel_value /= 2;
4243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n",
4244 GNUNET_STRINGS_relative_time_to_string (rel->expected_delay,
4246 rel->retry_timer = rel->expected_delay;
4247 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
4251 if (GNUNET_YES == work)
4253 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
4255 GNUNET_SCHEDULER_cancel (rel->retry_task);
4256 if (NULL == rel->head_sent)
4258 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
4262 struct GNUNET_TIME_Absolute new_target;
4263 struct GNUNET_TIME_Relative delay;
4265 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
4266 MESH_RETRANSMIT_MARGIN);
4267 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
4269 delay = GNUNET_TIME_absolute_get_remaining (new_target);
4271 GNUNET_SCHEDULER_add_delayed (delay,
4272 &tunnel_retransmit_message,
4283 * Core handler for mesh network traffic point-to-point acks.
4285 * @param cls closure
4286 * @param message message
4287 * @param peer peer identity this notification is about
4289 * @return GNUNET_OK to keep the connection open,
4290 * GNUNET_SYSERR to close it (signal serious error)
4293 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4294 const struct GNUNET_MessageHeader *message)
4296 struct GNUNET_MESH_ACK *msg;
4297 struct MeshTunnel *t;
4298 struct MeshFlowControl *fc;
4302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4304 msg = (struct GNUNET_MESH_ACK *) message;
4306 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4310 /* TODO notify that we dont know this tunnel (whom)? */
4311 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4314 ack = ntohl (msg->pid);
4315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4317 /* Is this a forward or backward ACK? */
4318 id = GNUNET_PEER_search (peer);
4319 if (t->next_hop == id)
4322 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4325 else if (t->prev_hop == id)
4328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4333 GNUNET_break_op (0);
4337 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
4338 GMC_is_pid_bigger (ack, fc->last_ack_recv))
4340 GNUNET_SCHEDULER_cancel (fc->poll_task);
4341 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4342 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4344 fc->last_ack_recv = ack;
4345 peer_unlock_queue (id);
4347 if (t->next_hop == id)
4348 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4350 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK);
4357 * Core handler for mesh network traffic point-to-point ack polls.
4359 * @param cls closure
4360 * @param message message
4361 * @param peer peer identity this notification is about
4363 * @return GNUNET_OK to keep the connection open,
4364 * GNUNET_SYSERR to close it (signal serious error)
4367 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4368 const struct GNUNET_MessageHeader *message)
4370 struct GNUNET_MESH_Poll *msg;
4371 struct MeshTunnel *t;
4372 struct MeshFlowControl *fc;
4377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
4380 msg = (struct GNUNET_MESH_Poll *) message;
4382 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4386 /* TODO notify that we dont know this tunnel (whom)? */
4387 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4388 GNUNET_break_op (0);
4392 /* Is this a forward or backward ACK? */
4393 id = GNUNET_PEER_search(peer);
4394 pid = ntohl (msg->pid);
4395 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid);
4396 if (t->next_hop == id)
4398 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4399 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", t->next_fc.last_pid_recv);
4401 old = fc->last_pid_recv;
4402 fc->last_pid_recv = pid;
4403 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
4405 else if (t->prev_hop == id)
4407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", t->prev_fc.last_pid_recv);
4410 old = fc->last_pid_recv;
4411 fc->last_pid_recv = pid;
4412 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL);
4417 if (GNUNET_YES == t->reliable)
4418 fc->last_pid_recv = old;
4425 * Core handler for mesh keepalives.
4427 * @param cls closure
4428 * @param message message
4429 * @param peer peer identity this notification is about
4430 * @return GNUNET_OK to keep the connection open,
4431 * GNUNET_SYSERR to close it (signal serious error)
4433 * TODO: Check who we got this from, to validate route.
4436 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4437 const struct GNUNET_MessageHeader *message)
4439 struct GNUNET_MESH_TunnelKeepAlive *msg;
4440 struct MeshTunnel *t;
4442 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4445 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4446 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4450 /* TODO notify that we dont know that tunnel */
4451 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4456 tunnel_reset_timeout (t);
4457 if (NULL != t->client || 0 == t->next_hop || myid == t->next_hop)
4460 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4461 send_prebuilt_message (message, t->next_hop, t);
4468 * Functions to handle messages from core
4470 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4471 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4472 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4473 sizeof (struct GNUNET_MESH_PathBroken)},
4474 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4475 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4476 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4477 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4478 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK,
4479 sizeof (struct GNUNET_MESH_DataACK)},
4480 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK,
4481 sizeof (struct GNUNET_MESH_DataACK)},
4482 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE,
4483 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4484 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4485 sizeof (struct GNUNET_MESH_ACK)},
4486 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4487 sizeof (struct GNUNET_MESH_Poll)},
4488 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4489 sizeof (struct GNUNET_MESH_PathACK)},
4495 /******************************************************************************/
4496 /**************** MESH LOCAL HANDLER HELPERS ***********************/
4497 /******************************************************************************/
4502 * notify_client_connection_failure: notify a client that the connection to the
4503 * requested remote peer is not possible (for instance, no route found)
4504 * Function called when the socket is ready to queue more data. "buf" will be
4505 * NULL and "size" zero if the socket was closed for writing in the meantime.
4507 * @param cls closure
4508 * @param size number of bytes available in buf
4509 * @param buf where the callee should write the message
4510 * @return number of bytes written to buf
4513 notify_client_connection_failure (void *cls, size_t size, void *buf)
4516 struct MeshPeerInfo *peer_info;
4517 struct GNUNET_MESH_PeerControl *msg;
4518 struct GNUNET_PeerIdentity id;
4520 if (0 == size && NULL == buf)
4522 // TODO retry? cancel?
4526 size_needed = sizeof (struct GNUNET_MESH_PeerControl);
4527 peer_info = (struct MeshPeerInfo *) cls;
4528 msg = (struct GNUNET_MESH_PeerControl *) buf;
4529 msg->header.size = htons (sizeof (struct GNUNET_MESH_PeerControl));
4530 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_PEER_DISCONNECTED);
4531 // msg->tunnel_id = htonl(peer_info->t->tid);
4532 GNUNET_PEER_resolve (peer_info->id, &id);
4533 memcpy (&msg->peer, &id, sizeof (struct GNUNET_PeerIdentity));
4541 * Send keepalive packets for a tunnel.
4543 * @param cls Closure (tunnel for which to send the keepalive).
4544 * @param tc Notification context.
4546 * FIXME: add a refresh reset in case of normal unicast traffic is doing the job
4549 path_refresh (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4551 struct MeshTunnel *t = cls;
4552 struct GNUNET_MESH_TunnelKeepAlive *msg;
4553 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
4556 t->maintenance_task = GNUNET_SCHEDULER_NO_TASK;
4557 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
4558 NULL == t->owner || 0 == t->local_tid)
4563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4564 "sending keepalive for tunnel %d\n", t->id.tid);
4566 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
4567 msg->header.size = htons (size);
4568 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_KEEPALIVE);
4569 msg->oid = my_full_id;
4570 msg->tid = htonl (t->id.tid);
4571 send_prebuilt_message (&msg->header, t->next_hop, t);
4573 t->maintenance_task =
4574 GNUNET_SCHEDULER_add_delayed (refresh_path_time, &path_refresh, t);
4579 * Function to process paths received for a new peer addition. The recorded
4580 * paths form the initial tunnel, which can be optimized later.
4581 * Called on each result obtained for the DHT search.
4583 * @param cls closure
4584 * @param exp when will this value expire
4585 * @param key key of the result
4586 * @param get_path path of the get request
4587 * @param get_path_length lenght of get_path
4588 * @param put_path path of the put request
4589 * @param put_path_length length of the put_path
4590 * @param type type of the result
4591 * @param size number of bytes in data
4592 * @param data pointer to the result data
4595 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4596 const struct GNUNET_HashCode * key,
4597 const struct GNUNET_PeerIdentity *get_path,
4598 unsigned int get_path_length,
4599 const struct GNUNET_PeerIdentity *put_path,
4600 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4601 size_t size, const void *data)
4603 struct MeshPeerInfo *peer = cls;
4604 struct MeshPeerPath *p;
4605 struct GNUNET_PeerIdentity pi;
4608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4609 GNUNET_PEER_resolve (peer->id, &pi);
4610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4612 p = path_build_from_dht (get_path, get_path_length,
4613 put_path, put_path_length);
4614 path_add_to_peers (p, GNUNET_NO);
4616 for (i = 0; i < peer->ntunnels; i++)
4618 struct GNUNET_PeerIdentity id;
4620 GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id);
4621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n",
4622 GNUNET_i2s (&id), peer->tunnels[i]->id.tid,
4623 peer->tunnels[i]->local_tid,
4624 peer->tunnels[i]->local_tid_dest);
4625 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
4627 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
4628 peer_connect (peer, peer->tunnels[i]);
4636 /******************************************************************************/
4637 /********************* MESH LOCAL HANDLES **************************/
4638 /******************************************************************************/
4642 * Handler for client connection.
4644 * @param cls Closure (unused).
4645 * @param client Client handler.
4648 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
4650 struct MeshClient *c;
4654 c = GNUNET_malloc (sizeof (struct MeshClient));
4656 GNUNET_SERVER_client_keep (client);
4657 GNUNET_SERVER_client_set_user_context (client, c);
4658 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4663 * Handler for client disconnection
4665 * @param cls closure
4666 * @param client identification of the client; NULL
4667 * for the last call when the server is destroyed
4670 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4672 struct MeshClient *c;
4673 struct MeshClient *next;
4675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
4678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4682 c = client_get (client);
4685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
4687 GNUNET_SERVER_client_drop (c->handle);
4688 c->shutting_down = GNUNET_YES;
4689 if (NULL != c->own_tunnels)
4691 GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels,
4692 &tunnel_destroy_iterator, c);
4693 GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels);
4696 if (NULL != c->incoming_tunnels)
4698 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels,
4699 &tunnel_destroy_iterator, c);
4700 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels);
4703 if (NULL != c->ports)
4704 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
4706 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
4709 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4714 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
4716 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4722 * Handler for new clients
4724 * @param cls closure
4725 * @param client identification of the client
4726 * @param message the actual message, which includes messages the client wants
4729 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4730 const struct GNUNET_MessageHeader *message)
4732 struct GNUNET_MESH_ClientConnect *cc_msg;
4733 struct MeshClient *c;
4738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
4740 /* Check data sanity */
4741 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4742 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4743 if (0 != (size % sizeof (uint32_t)))
4746 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4749 size /= sizeof (uint32_t);
4751 /* Initialize new client structure */
4752 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
4753 c->id = next_client_id++; /* overflow not important: just for debug */
4754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
4755 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
4760 p = (uint32_t *) &cc_msg[1];
4761 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
4762 for (i = 0; i < size; i++)
4765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
4767 /* store in client's hashmap */
4768 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
4769 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4770 /* store in global hashmap */
4771 /* FIXME only allow one client to have the port open,
4772 * have a backup hashmap with waiting clients */
4773 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
4774 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4778 c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4779 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4780 GNUNET_SERVER_notification_context_add (nc, client);
4781 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
4783 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4784 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
4789 * Handler for requests of new tunnels
4791 * @param cls Closure.
4792 * @param client Identification of the client.
4793 * @param message The actual message.
4796 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
4797 const struct GNUNET_MessageHeader *message)
4799 struct GNUNET_MESH_TunnelMessage *t_msg;
4800 struct MeshPeerInfo *peer_info;
4801 struct MeshTunnel *t;
4802 struct MeshClient *c;
4803 MESH_TunnelNumber tid;
4805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
4807 /* Sanity check for client registration */
4808 if (NULL == (c = client_get (client)))
4811 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4816 /* Message size sanity check */
4817 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4820 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4824 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4825 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4826 GNUNET_i2s (&t_msg->peer));
4827 /* Sanity check for tunnel numbering */
4828 tid = ntohl (t_msg->tunnel_id);
4829 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4832 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4835 /* Sanity check for duplicate tunnel IDs */
4836 if (NULL != tunnel_get_by_local_id (c, tid))
4839 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4844 while (NULL != tunnel_get_by_pi (myid, next_tid))
4845 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4846 t = tunnel_new (myid, next_tid, c, tid);
4847 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4851 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4854 t->port = ntohl (t_msg->port);
4855 tunnel_set_options (t, ntohl (t_msg->opt));
4856 if (GNUNET_YES == t->reliable)
4858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
4859 t->fwd_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
4861 t->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
4864 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
4865 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
4867 peer_info = peer_get (&t_msg->peer);
4868 peer_info_add_tunnel (peer_info, t);
4869 peer_connect (peer_info, t);
4870 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4876 * Handler for requests of deleting tunnels
4878 * @param cls closure
4879 * @param client identification of the client
4880 * @param message the actual message
4883 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
4884 const struct GNUNET_MessageHeader *message)
4886 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
4887 struct MeshClient *c;
4888 struct MeshTunnel *t;
4889 MESH_TunnelNumber tid;
4891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4892 "Got a DESTROY TUNNEL from client!\n");
4894 /* Sanity check for client registration */
4895 if (NULL == (c = client_get (client)))
4898 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4901 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4903 /* Message sanity check */
4904 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4907 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4911 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4913 /* Retrieve tunnel */
4914 tid = ntohl (tunnel_msg->tunnel_id);
4915 t = tunnel_get_by_local_id(c, tid);
4918 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
4920 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4924 /* Cleanup after the tunnel */
4925 client_delete_tunnel (c, t);
4932 peer_info_remove_tunnel (peer_get_short (t->dest), t);
4936 /* The tunnel will be destroyed when the last message is transmitted. */
4937 tunnel_destroy_empty (t);
4939 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4945 * Handler for client traffic
4947 * @param cls closure
4948 * @param client identification of the client
4949 * @param message the actual message
4952 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
4953 const struct GNUNET_MessageHeader *message)
4955 struct GNUNET_MESH_LocalData *data_msg;
4956 struct MeshClient *c;
4957 struct MeshTunnel *t;
4958 struct MeshFlowControl *fc;
4959 MESH_TunnelNumber tid;
4962 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4963 "Got data from a client!\n");
4965 /* Sanity check for client registration */
4966 if (NULL == (c = client_get (client)))
4969 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4974 data_msg = (struct GNUNET_MESH_LocalData *) message;
4976 /* Sanity check for message size */
4977 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
4978 if (size < sizeof (struct GNUNET_MessageHeader))
4981 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4985 /* Tunnel exists? */
4986 tid = ntohl (data_msg->tid);
4987 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI)
4990 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4993 t = tunnel_get_by_local_id (c, tid);
4997 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5001 /* Is the client in the tunnel? */
5002 if ( !( (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5004 t->owner->handle == client)
5006 (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5008 t->client->handle == client) ) )
5011 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5015 /* Ok, everything is correct, send the message
5016 * (pretend we got it from a mesh peer)
5019 struct GNUNET_MESH_Data *payload;
5020 char cbuf[sizeof(struct GNUNET_MESH_Data) + size];
5022 fc = tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? &t->prev_fc : &t->next_fc;
5023 if (GNUNET_YES == t->reliable)
5025 struct MeshTunnelReliability *rel;
5026 struct MeshReliableMessage *copy;
5028 rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel;
5029 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage)
5030 + sizeof(struct GNUNET_MESH_Data)
5032 copy->mid = rel->mid_sent++;
5033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %llu\n", copy->mid);
5034 copy->timestamp = GNUNET_TIME_absolute_get ();
5037 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
5038 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
5041 GNUNET_TIME_relative_multiply (rel->expected_delay,
5042 MESH_RETRANSMIT_MARGIN);
5044 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
5045 &tunnel_retransmit_message,
5048 payload = (struct GNUNET_MESH_Data *) ©[1];
5049 payload->mid = GNUNET_htonll (copy->mid);
5053 payload = (struct GNUNET_MESH_Data *) cbuf;
5055 // FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
5056 // use different struct for unreliable traffic, save 8 bytes
5058 memcpy (&payload[1], &data_msg[1], size);
5059 payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size);
5060 payload->header.type = htons (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ?
5061 GNUNET_MESSAGE_TYPE_MESH_UNICAST :
5062 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5063 GNUNET_PEER_resolve(t->id.oid, &payload->oid);;
5064 payload->tid = htonl (t->id.tid);
5065 payload->ttl = htonl (default_ttl);
5066 payload->pid = htonl (fc->last_pid_recv + 1);
5067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5068 " calling generic handler...\n");
5069 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5070 handle_mesh_unicast (NULL, &my_full_id, &payload->header);
5072 handle_mesh_to_orig (NULL, &my_full_id, &payload->header);
5074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
5075 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5082 * Handler for client's ACKs for payload traffic.
5084 * @param cls Closure (unused).
5085 * @param client Identification of the client.
5086 * @param message The actual message.
5089 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5090 const struct GNUNET_MessageHeader *message)
5092 struct GNUNET_MESH_LocalAck *msg;
5093 struct MeshTunnel *t;
5094 struct MeshClient *c;
5095 MESH_TunnelNumber tid;
5097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5098 /* Sanity check for client registration */
5099 if (NULL == (c = client_get (client)))
5102 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5107 msg = (struct GNUNET_MESH_LocalAck *) message;
5109 /* Tunnel exists? */
5110 tid = ntohl (msg->tunnel_id);
5111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5112 t = tunnel_get_by_local_id (c, tid);
5116 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5117 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5118 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5122 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5125 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5126 t->prev_fc.last_ack_recv++;
5127 tunnel_send_bck_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
5131 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5132 t->next_fc.last_ack_recv++;
5133 tunnel_send_fwd_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
5136 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5144 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5146 * @param cls Closure (client handle).
5147 * @param key Key (hashed tunnel ID, unused).
5148 * @param value Tunnel info.
5150 * @return GNUNET_YES, to keep iterating.
5153 monitor_all_tunnels_iterator (void *cls,
5154 const struct GNUNET_HashCode * key,
5157 struct GNUNET_SERVER_Client *client = cls;
5158 struct MeshTunnel *t = value;
5159 struct GNUNET_MESH_LocalMonitor *msg;
5161 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5162 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5163 msg->tunnel_id = htonl (t->id.tid);
5164 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5165 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5166 GNUNET_PEER_resolve (t->dest, &msg->destination);
5168 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5169 "* sending info about tunnel %s [%u]\n",
5170 GNUNET_i2s (&msg->owner), t->id.tid);
5172 GNUNET_SERVER_notification_context_unicast (nc, client,
5173 &msg->header, GNUNET_NO);
5179 * Handler for client's MONITOR request.
5181 * @param cls Closure (unused).
5182 * @param client Identification of the client.
5183 * @param message The actual message.
5186 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5187 const struct GNUNET_MessageHeader *message)
5189 struct MeshClient *c;
5191 /* Sanity check for client registration */
5192 if (NULL == (c = client_get (client)))
5195 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5199 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5200 "Received get tunnels request from client %u\n",
5202 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5203 monitor_all_tunnels_iterator,
5205 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5206 "Get tunnels request from client %u completed\n",
5208 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5213 * Handler for client's MONITOR_TUNNEL request.
5215 * @param cls Closure (unused).
5216 * @param client Identification of the client.
5217 * @param message The actual message.
5220 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5221 const struct GNUNET_MessageHeader *message)
5223 const struct GNUNET_MESH_LocalMonitor *msg;
5224 struct GNUNET_MESH_LocalMonitor *resp;
5225 struct MeshClient *c;
5226 struct MeshTunnel *t;
5228 /* Sanity check for client registration */
5229 if (NULL == (c = client_get (client)))
5232 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5236 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5237 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5238 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5241 ntohl (msg->tunnel_id));
5242 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5245 /* We don't know the tunnel FIXME */
5246 struct GNUNET_MESH_LocalMonitor warn;
5249 GNUNET_SERVER_notification_context_unicast (nc, client,
5252 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5256 /* Initialize context */
5257 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5259 GNUNET_PEER_resolve (t->dest, &resp->destination);
5260 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5261 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5262 &resp->header, GNUNET_NO);
5265 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5266 "Monitor tunnel request from client %u completed\n",
5268 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5273 * Functions to handle messages from clients
5275 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5276 {&handle_local_new_client, NULL,
5277 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5278 {&handle_local_tunnel_create, NULL,
5279 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5280 sizeof (struct GNUNET_MESH_TunnelMessage)},
5281 {&handle_local_tunnel_destroy, NULL,
5282 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5283 sizeof (struct GNUNET_MESH_TunnelMessage)},
5284 {&handle_local_data, NULL,
5285 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
5286 {&handle_local_ack, NULL,
5287 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5288 sizeof (struct GNUNET_MESH_LocalAck)},
5289 {&handle_local_get_tunnels, NULL,
5290 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5291 sizeof (struct GNUNET_MessageHeader)},
5292 {&handle_local_show_tunnel, NULL,
5293 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5294 sizeof (struct GNUNET_MESH_LocalMonitor)},
5300 * Method called whenever a given peer connects.
5302 * @param cls closure
5303 * @param peer peer identity this notification is about
5306 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5308 struct MeshPeerInfo *peer_info;
5309 struct MeshPeerPath *path;
5311 DEBUG_CONN ("Peer connected\n");
5312 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5313 peer_info = peer_get (peer);
5314 if (myid == peer_info->id)
5316 DEBUG_CONN (" (self)\n");
5317 path = path_new (1);
5321 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5322 path = path_new (2);
5323 path->peers[1] = peer_info->id;
5324 GNUNET_PEER_change_rc (peer_info->id, 1);
5325 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5327 path->peers[0] = myid;
5328 GNUNET_PEER_change_rc (myid, 1);
5329 peer_info_add_path (peer_info, path, GNUNET_YES);
5335 * Method called whenever a peer disconnects.
5337 * @param cls closure
5338 * @param peer peer identity this notification is about
5341 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5343 struct MeshPeerInfo *pi;
5344 struct MeshPeerQueue *q;
5345 struct MeshPeerQueue *n;
5347 DEBUG_CONN ("Peer disconnected\n");
5348 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5358 /* TODO try to reroute this traffic instead */
5359 queue_destroy(q, GNUNET_YES);
5362 if (NULL != pi->core_transmit)
5364 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5365 pi->core_transmit = NULL;
5367 peer_remove_path (pi, pi->id, myid);
5370 DEBUG_CONN (" (self)\n");
5372 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5378 * Install server (service) handlers and start listening to clients.
5383 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5384 GNUNET_SERVER_connect_notify (server_handle,
5385 &handle_local_client_connect, NULL);
5386 GNUNET_SERVER_disconnect_notify (server_handle,
5387 &handle_local_client_disconnect, NULL);
5388 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5390 clients_head = NULL;
5391 clients_tail = NULL;
5393 GNUNET_SERVER_resume (server_handle);
5398 * To be called on core init/fail.
5400 * @param cls Closure (config)
5401 * @param server handle to the server for this service
5402 * @param identity the public identity of this peer
5405 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5406 const struct GNUNET_PeerIdentity *identity)
5408 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5412 GNUNET_break (core_handle == server);
5413 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5416 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5417 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5419 GNUNET_i2s (identity));
5420 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5422 GNUNET_i2s (&my_full_id));
5423 GNUNET_CORE_disconnect (core_handle);
5424 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5425 NULL, /* Closure passed to MESH functions */
5426 &core_init, /* Call core_init once connected */
5427 &core_connect, /* Handle connects */
5428 &core_disconnect, /* remove peers on disconnects */
5429 NULL, /* Don't notify about all incoming messages */
5430 GNUNET_NO, /* For header only in notification */
5431 NULL, /* Don't notify about all outbound messages */
5432 GNUNET_NO, /* For header-only out notification */
5433 core_handlers); /* Register these handlers */
5442 /******************************************************************************/
5443 /************************ MAIN FUNCTIONS ****************************/
5444 /******************************************************************************/
5447 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5449 * @param cls closure
5450 * @param key current key code
5451 * @param value value in the hash map
5452 * @return GNUNET_YES if we should continue to iterate,
5456 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5458 struct MeshTunnel *t = value;
5465 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5467 * @param cls closure
5468 * @param key current key code
5469 * @param value value in the hash map
5470 * @return GNUNET_YES if we should continue to iterate,
5474 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5476 struct MeshPeerInfo *p = value;
5477 struct MeshPeerQueue *q;
5478 struct MeshPeerQueue *n;
5486 queue_destroy(q, GNUNET_YES);
5490 peer_info_destroy (p);
5496 * Task run during shutdown.
5502 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5506 if (core_handle != NULL)
5508 GNUNET_CORE_disconnect (core_handle);
5511 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5512 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5513 if (dht_handle != NULL)
5515 GNUNET_DHT_disconnect (dht_handle);
5520 GNUNET_SERVER_notification_context_destroy (nc);
5523 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5525 GNUNET_SCHEDULER_cancel (announce_id_task);
5526 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5533 * Process mesh requests.
5535 * @param cls closure
5536 * @param server the initialized server
5537 * @param c configuration to use
5540 run (void *cls, struct GNUNET_SERVER_Handle *server,
5541 const struct GNUNET_CONFIGURATION_Handle *c)
5544 struct GNUNET_CRYPTO_EccPrivateKey *pk;
5546 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5547 server_handle = server;
5548 GNUNET_SERVER_suspend (server_handle);
5551 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5554 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5556 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5557 "mesh", "peer/privatekey");
5558 GNUNET_SCHEDULER_shutdown ();
5563 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5564 &refresh_path_time))
5566 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5568 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5569 "mesh", "refresh path time");
5570 GNUNET_SCHEDULER_shutdown ();
5575 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5578 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5580 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5581 "mesh", "id announce time");
5582 GNUNET_SCHEDULER_shutdown ();
5587 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5590 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5592 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5593 "mesh", "connect timeout");
5594 GNUNET_SCHEDULER_shutdown ();
5599 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5602 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5604 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5605 "mesh", "max msgs queue");
5606 GNUNET_SCHEDULER_shutdown ();
5611 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5614 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5616 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5617 "mesh", "max tunnels");
5618 GNUNET_SCHEDULER_shutdown ();
5623 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5626 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5628 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5629 "mesh", "default ttl", 64);
5634 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5637 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5638 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5639 "mesh", "max peers", 1000);
5644 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
5651 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5652 "Mesh is running with drop mode enabled. "
5653 "This is NOT a good idea! "
5654 "Remove the DROP_PERCENT option from your configuration.\n");
5658 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5659 &dht_replication_level))
5661 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5663 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5664 "mesh", "dht replication level", 3);
5665 dht_replication_level = 3;
5668 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5669 incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5670 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5671 ports = GNUNET_CONTAINER_multihashmap32_create (32);
5673 dht_handle = GNUNET_DHT_connect (c, 64);
5674 if (NULL == dht_handle)
5678 stats = GNUNET_STATISTICS_create ("mesh", c);
5680 /* Scheduled the task to clean up when shutdown is called */
5681 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5683 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
5684 GNUNET_free (keyfile);
5685 GNUNET_assert (NULL != pk);
5686 my_private_key = pk;
5687 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5688 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5689 &my_full_id.hashPubKey);
5690 myid = GNUNET_PEER_intern (&my_full_id);
5691 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5692 "Mesh for peer [%s] starting\n",
5693 GNUNET_i2s(&my_full_id));
5695 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5696 NULL, /* Closure passed to MESH functions */
5697 &core_init, /* Call core_init once connected */
5698 &core_connect, /* Handle connects */
5699 &core_disconnect, /* remove peers on disconnects */
5700 NULL, /* Don't notify about all incoming messages */
5701 GNUNET_NO, /* For header only in notification */
5702 NULL, /* Don't notify about all outbound messages */
5703 GNUNET_NO, /* For header-only out notification */
5704 core_handlers); /* Register these handlers */
5705 if (NULL == core_handle)
5708 GNUNET_SCHEDULER_shutdown ();
5712 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5713 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5719 * The main function for the mesh service.
5721 * @param argc number of arguments from the command line
5722 * @param argv command line arguments
5723 * @return 0 ok, 1 on error
5726 main (int argc, char *const *argv)
5731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5732 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5734 ret = (GNUNET_OK == r) ? 0 : 1;
5735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");
5739 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5740 "Mesh for peer [%s] FWD ACKs %u, BCK ACKs %u\n",
5741 GNUNET_i2s(&my_full_id), debug_fwd_ack, debug_bck_ack);