2 This file is part of GNUnet.
3 (C) 2001-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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,
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22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
27 * - when sending in-order buffered data, wait for client ACKs
30 * - relay corking down to core
31 * - set ttl relative to path length
39 #include "mesh_protocol.h"
40 #include "mesh_path.h"
41 #include "block_mesh.h"
42 #include "gnunet_dht_service.h"
43 #include "gnunet_statistics_service.h"
45 #define MESH_BLOOM_SIZE 128
47 #define MESH_DEBUG_DHT GNUNET_NO
48 #define MESH_DEBUG_CONNECTION GNUNET_NO
49 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
51 #define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\
52 GNUNET_TIME_UNIT_MINUTES,\
54 #define MESH_RETRANSMIT_TIME GNUNET_TIME_UNIT_SECONDS
55 #define MESH_RETRANSMIT_MARGIN 4
57 #if MESH_DEBUG_CONNECTION
58 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
60 #define DEBUG_CONN(...)
64 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
66 #define DEBUG_DHT(...)
73 struct timespec __mesh_start;
74 struct timespec __mesh_end;
75 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
76 #define INTERVAL_END \
78 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
79 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
80 if (__diff < 0) __diff += 1000000000;\
84 #define INTERVAL_SHOW \
86 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
88 #define INTERVAL_START
93 /******************************************************************************/
94 /************************ DATA STRUCTURES ****************************/
95 /******************************************************************************/
97 /** FWD declaration */
103 * Struct containing info about a queued transmission to this peer
110 struct MeshPeerQueue *next;
115 struct MeshPeerQueue *prev;
118 * Peer this transmission is directed to.
120 struct MeshPeerInfo *peer;
123 * Tunnel this message belongs to.
125 struct MeshTunnel *tunnel;
128 * Pointer to info stucture used as cls.
138 * Size of the message
145 * Struct containing all information regarding a given peer
155 * Last time we heard from this peer
157 struct GNUNET_TIME_Absolute last_contact;
160 * Number of attempts to reconnect so far
162 int n_reconnect_attempts;
165 * Paths to reach the peer, ordered by ascending hop count
167 struct MeshPeerPath *path_head;
170 * Paths to reach the peer, ordered by ascending hop count
172 struct MeshPeerPath *path_tail;
175 * Handle to stop the DHT search for a path to this peer
177 struct GNUNET_DHT_GetHandle *dhtget;
180 * Array of tunnels this peer is the target of.
181 * Most probably a small amount, therefore not a hashmap.
182 * When the path to the peer changes, notify these tunnels to let them
183 * re-adjust their path trees.
185 struct MeshTunnel **tunnels;
188 * Number of tunnels this peers participates in
190 unsigned int ntunnels;
193 * Transmission queue to core DLL head
195 struct MeshPeerQueue *queue_head;
198 * Transmission queue to core DLL tail
200 struct MeshPeerQueue *queue_tail;
203 * How many messages are in the queue to this peer.
205 unsigned int queue_n;
208 * Handle for queued transmissions
210 struct GNUNET_CORE_TransmitHandle *core_transmit;
215 * Struct to encapsulate all the Flow Control information to a peer in the
216 * context of a tunnel: Same peer in different tunnels will have independent
217 * flow control structures, allowing to choke/free tunnels according to its
220 struct MeshFlowControl
223 * ID of the last packet sent towards the peer.
225 uint32_t last_pid_sent;
228 * ID of the last packet received from the peer.
230 uint32_t last_pid_recv;
233 * Last ACK sent to the peer (peer can't send more than this PID).
235 uint32_t last_ack_sent;
238 * Last ACK sent towards the origin (for traffic towards leaf node).
240 uint32_t last_ack_recv;
243 * How many payload messages are in the queue towards this peer.
248 * Task to poll the peer in case of a lost ACK causes stall.
250 GNUNET_SCHEDULER_TaskIdentifier poll_task;
253 * How frequently to poll for ACKs.
255 struct GNUNET_TIME_Relative poll_time;
258 * On which tunnel to poll.
259 * Using an explicit poll_ctx would not help memory wise,
260 * since the allocated context would have to be stored in the
261 * fc struct in order to free it upon cancelling poll_task.
263 struct MeshTunnel *t;
268 * Globally unique tunnel identification (owner + number)
269 * DO NOT USE OVER THE NETWORK
274 * Node that owns the tunnel
279 * Tunnel number to differentiate all the tunnels owned by the node oid
280 * ( tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI )
282 MESH_TunnelNumber tid;
287 * Data needed for reliable tunnel endpoint retransmission management.
289 struct MeshTunnelReliability;
293 * Info needed to retry a message in case it gets lost.
295 struct MeshReliableMessage
298 * Double linked list, FIFO style
300 struct MeshReliableMessage *next;
301 struct MeshReliableMessage *prev;
304 * Tunnel Reliability queue this message is in.
306 struct MeshTunnelReliability *rel;
309 * ID of the message (ACK needed to free)
314 * When was this message issued (to calculate ACK delay)
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.
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 fwd_maintenance_task;
476 * Task to keep the used paths alive at the destination,
477 * time tunnel out on all the other peers.
479 GNUNET_SCHEDULER_TaskIdentifier bck_maintenance_task;
482 * Path being used for the tunnel.
484 struct MeshPeerPath *path;
487 * Flag to signal the destruction of the tunnel.
488 * If this is set GNUNET_YES the tunnel will be destroyed
489 * when the queue is empty.
494 * Total messages pending for this tunnels, payload or not.
496 unsigned int pending_messages;
500 * Only present (non-NULL) at the owner of a tunnel.
502 struct MeshTunnelReliability *fwd_rel;
506 * Only present (non-NULL) at the destination of a tunnel.
508 struct MeshTunnelReliability *bck_rel;
513 * Struct containing information about a client of the service
515 * TODO: add a list of 'waiting' ports
522 struct MeshClient *next;
527 struct MeshClient *prev;
530 * Tunnels that belong to this client, indexed by local id
532 struct GNUNET_CONTAINER_MultiHashMap32 *own_tunnels;
535 * Tunnels this client has accepted, indexed by incoming local id
537 struct GNUNET_CONTAINER_MultiHashMap32 *incoming_tunnels;
540 * Handle to communicate with the client
542 struct GNUNET_SERVER_Client *handle;
545 * Ports that this client has declared interest in.
546 * Indexed by port, contains *Client.
548 struct GNUNET_CONTAINER_MultiHashMap32 *ports;
551 * Whether the client is active or shutting down (don't send confirmations
552 * to a client that is shutting down.
557 * ID of the client, mainly for debug messages
564 /******************************************************************************/
565 /************************ DEBUG FUNCTIONS ****************************/
566 /******************************************************************************/
570 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
571 * @param cls string to print
572 * @param success GNUNET_OK if the PUT was transmitted,
573 * GNUNET_NO on timeout,
574 * GNUNET_SYSERR on disconnect from service
575 * after the PUT message was transmitted
576 * (so we don't know if it was received or not)
581 mesh_debug (void *cls, int success)
585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
591 /******************************************************************************/
592 /*********************** GLOBAL VARIABLES ****************************/
593 /******************************************************************************/
595 /************************** Configuration parameters **************************/
598 * How often to send tunnel keepalives. Tunnels timeout after 4 missed.
600 static struct GNUNET_TIME_Relative refresh_path_time;
603 * How often to PUT own ID in the DHT.
605 static struct GNUNET_TIME_Relative id_announce_time;
608 * Maximum time allowed to connect to a peer found by string.
610 static struct GNUNET_TIME_Relative connect_timeout;
613 * Default TTL for payload packets.
615 static unsigned long long default_ttl;
618 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
620 static unsigned long long dht_replication_level;
623 * How many tunnels are we willing to maintain.
624 * Local tunnels are always allowed, even if there are more tunnels than max.
626 static unsigned long long max_tunnels;
629 * How many messages *in total* are we willing to queue, divided by number of
630 * tunnels to get tunnel queue size.
632 static unsigned long long max_msgs_queue;
635 * How many peers do we want to remember?
637 static unsigned long long max_peers;
640 * Percentage of messages that will be dropped (for test purposes only).
642 static unsigned long long drop_percent;
644 /*************************** Static global variables **************************/
647 * DLL with all the clients, head.
649 static struct MeshClient *clients_head;
652 * DLL with all the clients, tail.
654 static struct MeshClient *clients_tail;
657 * Tunnels known, indexed by MESH_TunnelID (MeshTunnel).
659 static struct GNUNET_CONTAINER_MultiHashMap *tunnels;
662 * Number of tunnels known.
664 static unsigned long long n_tunnels;
667 * Tunnels incoming, indexed by MESH_TunnelNumber
668 * (which is greater than GNUNET_MESH_LOCAL_TUNNEL_ID_SERV).
670 static struct GNUNET_CONTAINER_MultiHashMap32 *incoming_tunnels;
673 * Peers known, indexed by PeerIdentity (MeshPeerInfo).
675 static struct GNUNET_CONTAINER_MultiHashMap *peers;
678 * Handle to communicate with transport
680 // static struct GNUNET_TRANSPORT_Handle *transport_handle;
683 * Handle to communicate with core.
685 static struct GNUNET_CORE_Handle *core_handle;
690 static struct GNUNET_DHT_Handle *dht_handle;
695 static struct GNUNET_SERVER_Handle *server_handle;
698 * Handle to the statistics service.
700 static struct GNUNET_STATISTICS_Handle *stats;
703 * Notification context, to send messages to local clients.
705 static struct GNUNET_SERVER_NotificationContext *nc;
708 * Local peer own ID (memory efficient handle).
710 static GNUNET_PEER_Id myid;
713 * Local peer own ID (full value).
715 static struct GNUNET_PeerIdentity my_full_id;
720 static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
725 static struct GNUNET_CRYPTO_EccPublicKeyBinaryEncoded my_public_key;
728 * Tunnel ID for the next created tunnel (global tunnel number).
730 static MESH_TunnelNumber next_tid;
733 * Tunnel ID for the next incoming tunnel (local tunnel number).
735 static MESH_TunnelNumber next_local_tid;
738 * All ports clients of this peer have opened.
740 static struct GNUNET_CONTAINER_MultiHashMap32 *ports;
743 * Task to periodically announce itself in the network.
745 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
748 * Next ID to assign to a client.
750 unsigned int next_client_id;
753 /******************************************************************************/
754 /*********************** DECLARATIONS **************************/
755 /******************************************************************************/
758 * Function to process paths received for a new peer addition. The recorded
759 * paths form the initial tunnel, which can be optimized later.
760 * Called on each result obtained for the DHT search.
763 * @param exp when will this value expire
764 * @param key key of the result
765 * @param type type of the result
766 * @param size number of bytes in data
767 * @param data pointer to the result data
770 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
771 const struct GNUNET_HashCode * key,
772 const struct GNUNET_PeerIdentity *get_path,
773 unsigned int get_path_length,
774 const struct GNUNET_PeerIdentity *put_path,
775 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
776 size_t size, const void *data);
780 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
781 * and insert it in the appropriate structures if the peer is not known yet.
783 * @param peer Full identity of the peer.
785 * @return Existing or newly created peer info.
787 static struct MeshPeerInfo *
788 peer_get (const struct GNUNET_PeerIdentity *peer);
792 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
793 * and insert it in the appropriate structures if the peer is not known yet.
795 * @param peer Short identity of the peer.
797 * @return Existing or newly created peer info.
799 static struct MeshPeerInfo *
800 peer_get_short (const GNUNET_PEER_Id peer);
804 * Build a PeerPath from the paths returned from the DHT, reversing the paths
805 * to obtain a local peer -> destination path and interning the peer ids.
807 * @return Newly allocated and created path
809 static struct MeshPeerPath *
810 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
811 unsigned int get_path_length,
812 const struct GNUNET_PeerIdentity *put_path,
813 unsigned int put_path_length);
817 * Adds a path to the peer_infos of all the peers in the path
819 * @param p Path to process.
820 * @param confirmed Whether we know if the path works or not.
823 path_add_to_peers (struct MeshPeerPath *p, int confirmed);
828 * Search for a tunnel by global ID using full PeerIdentities.
830 * @param oid owner of the tunnel.
831 * @param tid global tunnel number.
833 * @return tunnel handler, NULL if doesn't exist.
835 static struct MeshTunnel *
836 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid);
840 * Change the tunnel state.
842 * @param t Tunnel whose ttate to change.
843 * @param state New state.
846 tunnel_change_state (struct MeshTunnel *t, enum MeshTunnelState state);
850 * Notify a tunnel that a connection has broken that affects at least
853 * @param t Tunnel affected.
854 * @param p1 Peer that got disconnected from p2.
855 * @param p2 Peer that got disconnected from p1.
857 * @return Short ID of the peer disconnected (either p1 or p2).
858 * 0 if the tunnel remained unaffected.
860 static GNUNET_PEER_Id
861 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
866 * Send FWD keepalive packets for a tunnel.
868 * @param cls Closure (tunnel for which to send the keepalive).
869 * @param tc Notification context.
872 tunnel_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
875 * Send BCK keepalive packets for a tunnel.
877 * @param cls Closure (tunnel for which to send the keepalive).
878 * @param tc Notification context.
881 tunnel_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
884 * @brief Use the given path for the tunnel.
885 * Update the next and prev hops (and RCs).
886 * (Re)start the path refresh in case the tunnel is locally owned.
888 * @param t Tunnel to update.
889 * @param p Path to use.
892 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p);
895 * Tunnel is empty: destroy it.
897 * Notifies all participants (peers, cleints) about the destruction.
899 * @param t Tunnel to destroy.
902 tunnel_destroy_empty (struct MeshTunnel *t);
905 * Destroy the tunnel.
907 * This function does not generate any warning traffic to clients or peers.
910 * Remove the tunnel from peer_info's and clients' hashmaps.
911 * Cancel messages belonging to this tunnel queued to neighbors.
912 * Free any allocated resources linked to the tunnel.
914 * @param t the tunnel to destroy
916 * @return GNUNET_OK on success
919 tunnel_destroy (struct MeshTunnel *t);
922 * @brief Queue and pass message to core when possible.
924 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
925 * and accounts for it. In case the queue is full, the message is dropped and
928 * Otherwise, message is treated as internal and allowed to go regardless of
931 * @param cls Closure (@c type dependant). It will be used by queue_send to
932 * build the message to be sent if not already prebuilt.
933 * @param type Type of the message, 0 for a raw message.
934 * @param size Size of the message.
935 * @param dst Neighbor to send message to.
936 * @param t Tunnel this message belongs to.
939 queue_add (void *cls, uint16_t type, size_t size,
940 struct MeshPeerInfo *dst, struct MeshTunnel *t);
944 * Free a transmission that was already queued with all resources
945 * associated to the request.
947 * @param queue Queue handler to cancel.
948 * @param clear_cls Is it necessary to free associated cls?
951 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
955 * @brief Get the next transmittable message from the queue.
957 * This will be the head, except in the case of being a data packet
958 * not allowed by the destination peer.
960 * @param peer Destination peer.
962 * @return The next viable MeshPeerQueue element to send to that peer.
963 * NULL when there are no transmittable messages.
965 struct MeshPeerQueue *
966 queue_get_next (const struct MeshPeerInfo *peer);
970 * Core callback to write a queued packet to core buffer
972 * @param cls Closure (peer info).
973 * @param size Number of bytes available in buf.
974 * @param buf Where the to write the message.
976 * @return number of bytes written to buf
979 queue_send (void *cls, size_t size, void *buf);
983 * Dummy function to separate declarations from definitions in function list.
986 __mesh_divider______________________________________________________________();
990 GNUNET_MESH_DEBUG_S2S (enum MeshTunnelState s)
992 static char buf[128];
997 * Uninitialized status, should never appear in operation.
999 case MESH_TUNNEL_NEW: return "MESH_TUNNEL_NEW";
1002 * Path to the peer not known yet
1004 case MESH_TUNNEL_SEARCHING: return "MESH_TUNNEL_SEARCHING";
1007 * Request sent, not yet answered.
1009 case MESH_TUNNEL_WAITING: return "MESH_TUNNEL_WAITING";
1012 * Peer connected and ready to accept data
1014 case MESH_TUNNEL_READY: return "MESH_TUNNEL_READY";
1017 * Peer connected previosly but not responding
1019 case MESH_TUNNEL_RECONNECTING: return "MESH_TUNNEL_RECONNECTING";
1022 sprintf (buf, "%u (UNKNOWN STATE)", s);
1028 /******************************************************************************/
1029 /************************ PERIODIC FUNCTIONS ****************************/
1030 /******************************************************************************/
1033 * Periodically announce self id in the DHT
1035 * @param cls closure
1036 * @param tc task context
1039 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1041 struct PBlock block;
1043 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1045 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1049 * - Set data expiration in function of X
1050 * - Adapt X to churn
1052 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1054 block.id = my_full_id;
1055 GNUNET_DHT_put (dht_handle, /* DHT handle */
1056 &my_full_id.hashPubKey, /* Key to use */
1057 dht_replication_level, /* Replication level */
1058 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1059 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1060 sizeof (block), /* Size of the data */
1061 (const char *) &block, /* Data itself */
1062 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1063 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1064 NULL, /* Continuation */
1065 NULL); /* Continuation closure */
1067 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1071 /******************************************************************************/
1072 /****************** GENERAL HELPER FUNCTIONS ************************/
1073 /******************************************************************************/
1077 * Check if client has registered with the service and has not disconnected
1079 * @param client the client to check
1081 * @return non-NULL if client exists in the global DLL
1083 static struct MeshClient *
1084 client_get (struct GNUNET_SERVER_Client *client)
1086 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
1091 * Deletes a tunnel from a client (either owner or destination). To be used on
1094 * @param c Client whose tunnel to delete.
1095 * @param t Tunnel which should be deleted.
1098 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1102 GNUNET_assert (GNUNET_YES ==
1103 GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels,
1109 GNUNET_assert (GNUNET_YES ==
1110 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
1118 * Notify the appropriate client that a new incoming tunnel was created.
1120 * @param t Tunnel that was created.
1123 send_local_tunnel_create (struct MeshTunnel *t)
1125 struct GNUNET_MESH_TunnelMessage msg;
1127 if (NULL == t->client)
1129 msg.header.size = htons (sizeof (msg));
1130 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1131 msg.tunnel_id = htonl (t->local_tid_dest);
1132 msg.port = htonl (t->port);
1134 msg.opt |= GNUNET_YES == t->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0;
1135 msg.opt |= GNUNET_YES == t->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0;
1136 msg.opt = htonl (msg.opt);
1137 GNUNET_PEER_resolve (t->id.oid, &msg.peer);
1138 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1139 &msg.header, GNUNET_NO);
1144 * Notify a client that the incoming tunnel is no longer valid.
1146 * @param t Tunnel that is destroyed.
1147 * @param fwd Forward notification (owner->dest)?
1150 send_local_tunnel_destroy (struct MeshTunnel *t, int fwd)
1152 struct GNUNET_MESH_TunnelMessage msg;
1153 struct MeshClient *c;
1155 c = fwd ? t->client : t->owner;
1161 msg.header.size = htons (sizeof (msg));
1162 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1163 msg.tunnel_id = htonl (fwd ? t->local_tid_dest : t->local_tid);
1164 msg.port = htonl (0);
1165 memset (&msg.peer, 0, sizeof (msg.peer));
1166 msg.opt = htonl (0);
1167 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1168 &msg.header, GNUNET_NO);
1173 * Build a local ACK message and send it to a local client.
1175 * @param t Tunnel on which to send the ACK.
1176 * @param c Client to whom send the ACK.
1177 * @param is_fwd Set to GNUNET_YES for FWD ACK (dest->owner)
1180 send_local_ack (struct MeshTunnel *t,
1181 struct MeshClient *c,
1184 struct GNUNET_MESH_LocalAck msg;
1186 msg.header.size = htons (sizeof (msg));
1187 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1188 msg.tunnel_id = htonl (is_fwd ? t->local_tid : t->local_tid_dest);
1189 GNUNET_SERVER_notification_context_unicast (nc,
1198 * Sends an already built message to a peer, properly registrating
1199 * all used resources.
1201 * @param message Message to send. Function makes a copy of it.
1202 * @param peer Short ID of the neighbor whom to send the message.
1203 * @param t Tunnel on which this message is transmitted.
1206 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1207 GNUNET_PEER_Id peer,
1208 struct MeshTunnel *t)
1210 struct GNUNET_PeerIdentity id;
1211 struct MeshPeerInfo *neighbor;
1212 struct MeshPeerPath *p;
1217 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1222 size = ntohs (message->size);
1223 data = GNUNET_malloc (size);
1224 memcpy (data, message, size);
1225 type = ntohs(message->type);
1226 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
1227 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
1229 struct GNUNET_MESH_Data *u;
1231 u = (struct GNUNET_MESH_Data *) data;
1232 u->ttl = htonl (ntohl (u->ttl) - 1);
1234 GNUNET_PEER_resolve (peer, &id);
1235 neighbor = peer_get (&id);
1236 for (p = neighbor->path_head; NULL != p; p = p->next)
1246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1247 " %s IS NOT DIRECTLY CONNECTED\n",
1249 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1252 for (p = neighbor->path_head; NULL != p; p = p->next)
1254 struct GNUNET_PeerIdentity debug_id;
1257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1258 " path with %u hops through:\n",
1260 for (i = 0; i < p->length; i++)
1262 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1265 i, GNUNET_i2s(&debug_id));
1270 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1271 " no direct connection to %s\n",
1276 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1287 * Sends a CREATE PATH message for a path to a peer, properly registrating
1288 * all used resources.
1290 * @param t Tunnel for which the path is created.
1293 send_path_create (struct MeshTunnel *t)
1295 struct MeshPeerInfo *neighbor;
1297 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send create path\n");
1298 neighbor = peer_get_short (t->next_hop);
1300 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1301 sizeof (struct GNUNET_MESH_CreateTunnel) +
1302 (t->path->length * sizeof (struct GNUNET_PeerIdentity)),
1305 tunnel_change_state (t, MESH_TUNNEL_WAITING);
1310 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1312 * @param t Tunnel which to confirm.
1315 send_path_ack (struct MeshTunnel *t)
1317 struct MeshPeerInfo *neighbor;
1319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send path ack\n");
1320 neighbor = peer_get_short (t->prev_hop);
1322 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1323 sizeof (struct GNUNET_MESH_PathACK),
1326 tunnel_change_state (t, MESH_TUNNEL_WAITING);
1331 * Build an ACK message and queue it to send to the given peer.
1333 * @param t Tunnel on which to send the ACK.
1334 * @param peer Peer to whom send the ACK.
1335 * @param ack Value of the ACK.
1338 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
1340 struct GNUNET_MESH_ACK msg;
1342 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1343 msg.header.size = htons (sizeof (msg));
1344 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
1345 msg.pid = htonl (ack);
1346 msg.tid = htonl (t->id.tid);
1348 send_prebuilt_message (&msg.header, peer, t);
1353 * Core callback to write a pre-constructed data packet to core buffer
1355 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1356 * @param size Number of bytes available in buf.
1357 * @param buf Where the to write the message.
1359 * @return number of bytes written to buf
1362 send_core_data_raw (void *cls, size_t size, void *buf)
1364 struct GNUNET_MessageHeader *msg = cls;
1367 GNUNET_assert (NULL != msg);
1368 total_size = ntohs (msg->size);
1370 if (total_size > size)
1375 memcpy (buf, msg, total_size);
1382 * Function to send a create path packet to a peer.
1384 * @param cls closure
1385 * @param size number of bytes available in buf
1386 * @param buf where the callee should write the message
1387 * @return number of bytes written to buf
1390 send_core_path_create (void *cls, size_t size, void *buf)
1392 struct MeshTunnel *t = cls;
1393 struct GNUNET_MESH_CreateTunnel *msg;
1394 struct GNUNET_PeerIdentity *peer_ptr;
1395 struct MeshPeerPath *p = t->path;
1400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
1402 sizeof (struct GNUNET_MESH_CreateTunnel) +
1403 p->length * sizeof (struct GNUNET_PeerIdentity);
1405 if (size < size_needed || NULL == buf)
1410 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
1411 msg->header.size = htons (size_needed);
1412 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1413 msg->tid = ntohl (t->id.tid);
1416 if (GNUNET_YES == t->nobuffer)
1417 opt |= GNUNET_MESH_OPTION_NOBUFFER;
1418 if (GNUNET_YES == t->reliable)
1419 opt |= GNUNET_MESH_OPTION_RELIABLE;
1420 msg->opt = htonl (opt);
1421 msg->port = htonl (t->port);
1423 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1424 for (i = 0; i < p->length; i++)
1426 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1430 "CREATE PATH (%u bytes long) sent!\n", size_needed);
1436 * Creates a path ack message in buf and frees all unused resources.
1438 * @param cls closure (MeshTransmissionDescriptor)
1439 * @param size number of bytes available in buf
1440 * @param buf where the callee should write the message
1441 * @return number of bytes written to buf
1444 send_core_path_ack (void *cls, size_t size, void *buf)
1446 struct MeshTunnel *t = cls;
1447 struct GNUNET_MESH_PathACK *msg = buf;
1449 GNUNET_assert (NULL != t);
1450 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1455 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
1456 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1457 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1458 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
1459 msg->tid = htonl (t->id.tid);
1460 msg->peer_id = my_full_id;
1461 msg->ack = htonl (t->prev_fc.last_ack_sent);
1463 /* TODO add signature */
1465 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
1466 return sizeof (struct GNUNET_MESH_PathACK);
1471 * Iterator over all the peers to remove the oldest not-used entry.
1473 * @param cls Closure (unsued).
1474 * @param key ID of the peer.
1475 * @param value Peer_Info of the peer.
1480 peer_info_timeout (void *cls,
1481 const struct GNUNET_HashCode *key,
1488 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1489 * and insert it in the appropriate structures if the peer is not known yet.
1491 * @param peer Full identity of the peer.
1493 * @return Existing or newly created peer info.
1495 static struct MeshPeerInfo *
1496 peer_get (const struct GNUNET_PeerIdentity *peer)
1498 struct MeshPeerInfo *peer_info;
1500 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1501 if (NULL == peer_info)
1504 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1505 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1507 GNUNET_CONTAINER_multihashmap_iterate (peers,
1511 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1512 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1513 peer_info->id = GNUNET_PEER_intern (peer);
1515 peer_info->last_contact = GNUNET_TIME_absolute_get();
1522 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1523 * and insert it in the appropriate structures if the peer is not known yet.
1525 * @param peer Short identity of the peer.
1527 * @return Existing or newly created peer info.
1529 static struct MeshPeerInfo *
1530 peer_get_short (const GNUNET_PEER_Id peer)
1532 struct GNUNET_PeerIdentity id;
1534 GNUNET_PEER_resolve (peer, &id);
1535 return peer_get (&id);
1540 * Select which PID to POLL for, to compensate for lost messages.
1542 * @param pi Peer we want to poll.
1543 * @param t Tunnel about which we want to poll.
1545 * @return PID to use, either last sent or first_in_queue - 1
1548 peer_get_first_payload_pid (struct MeshPeerInfo *pi, struct MeshTunnel *t)
1550 struct MeshPeerQueue *q;
1553 type = pi->id == t->next_hop ? GNUNET_MESSAGE_TYPE_MESH_UNICAST :
1554 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN;
1556 for (q = pi->queue_head; NULL != q; q = q->next)
1558 if (q->type == type && q->tunnel == t)
1560 struct GNUNET_MESH_Data *msg = q->cls;
1562 /* Pretend that the last one sent was the previous to this */
1563 return ntohl (msg->pid) - 1;
1567 /* No data in queue, use last sent */
1569 struct MeshFlowControl *fc;
1571 fc = pi->id == t->next_hop ? &t->next_fc : &t->prev_fc;
1572 return fc->last_pid_sent;
1578 * Choose the best path towards a peer considering the tunnel properties.
1580 * @param peer The destination peer.
1581 * @param t The tunnel the path is for.
1583 * @return Best current known path towards the peer, if any.
1585 static struct MeshPeerPath *
1586 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1588 struct MeshPeerPath *best_p;
1589 struct MeshPeerPath *p;
1590 unsigned int best_cost;
1593 best_p = p = peer->path_head;
1594 best_cost = cost = p->length;
1597 if ((cost = p->length) < best_cost)
1609 * Try to establish a new connection to this peer in the given tunnel.
1610 * If the peer doesn't have any path to it yet, try to get one.
1611 * If the peer already has some path, send a CREATE PATH towards it.
1613 * @param peer PeerInfo of the peer.
1614 * @param t Tunnel for which to create the path, if possible.
1617 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1619 struct MeshPeerPath *p;
1621 if (NULL != peer->path_head)
1623 p = peer_get_best_path (peer, t);
1624 tunnel_use_path (t, p);
1625 send_path_create (t);
1627 else if (NULL == peer->dhtget)
1629 struct GNUNET_PeerIdentity id;
1631 GNUNET_PEER_resolve (peer->id, &id);
1632 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1633 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1634 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1635 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1636 &id.hashPubKey, /* key to search */
1637 dht_replication_level, /* replication level */
1638 GNUNET_DHT_RO_RECORD_ROUTE |
1639 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1641 0, /* xquery bits */
1642 &dht_get_id_handler, peer);
1643 tunnel_change_state (t, MESH_TUNNEL_SEARCHING);
1647 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1648 "There is no path but the DHT GET is already started.\n");
1654 * @brief Re-initiate traffic to this peer if necessary.
1656 * Check if there is traffic queued towards this peer
1657 * and the core transmit handle is NULL (traffic was stalled).
1658 * If so, call core tmt rdy.
1660 * @param peer_id Short ID of peer to which initiate traffic.
1663 peer_unlock_queue (GNUNET_PEER_Id peer_id)
1665 struct MeshPeerInfo *peer;
1666 struct MeshPeerQueue *q;
1669 peer = peer_get_short (peer_id);
1670 if (NULL != peer->core_transmit)
1673 q = queue_get_next (peer);
1678 peer->core_transmit =
1679 GNUNET_CORE_notify_transmit_ready (core_handle,
1682 GNUNET_TIME_UNIT_FOREVER_REL,
1683 GNUNET_PEER_resolve2 (peer->id),
1691 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
1693 * @param t Tunnel which to cancel.
1694 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
1697 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
1699 struct MeshPeerInfo *peer_info;
1700 struct MeshPeerQueue *pq;
1701 struct MeshPeerQueue *next;
1702 struct MeshFlowControl *fc;
1705 return; /* Was local peer, 0'ed in tunnel_destroy_iterator */
1706 peer_info = peer_get_short (neighbor);
1707 for (pq = peer_info->queue_head; NULL != pq; pq = next)
1710 if (pq->tunnel == t)
1712 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
1713 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
1715 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1716 "peer_cancel_queues %s\n",
1717 GNUNET_MESH_DEBUG_M2S (pq->type));
1719 queue_destroy (pq, GNUNET_YES);
1722 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
1724 GNUNET_CORE_notify_transmit_ready_cancel (peer_info->core_transmit);
1725 peer_info->core_transmit = NULL;
1727 fc = neighbor == t->next_hop ? &t->next_fc : &t->prev_fc;
1728 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
1730 GNUNET_SCHEDULER_cancel (fc->poll_task);
1731 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1737 * Destroy the peer_info and free any allocated resources linked to it
1739 * @param pi The peer_info to destroy.
1741 * @return GNUNET_OK on success
1744 peer_info_destroy (struct MeshPeerInfo *pi)
1746 struct GNUNET_PeerIdentity id;
1747 struct MeshPeerPath *p;
1748 struct MeshPeerPath *nextp;
1751 GNUNET_PEER_resolve (pi->id, &id);
1752 GNUNET_PEER_change_rc (pi->id, -1);
1755 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1758 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1759 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1761 if (NULL != pi->dhtget)
1763 GNUNET_DHT_get_stop (pi->dhtget);
1769 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1773 for (i = 0; i < pi->ntunnels; i++)
1774 tunnel_destroy_empty (pi->tunnels[i]);
1775 GNUNET_array_grow (pi->tunnels, pi->ntunnels, 0);
1782 * Remove all paths that rely on a direct connection between p1 and p2
1783 * from the peer itself and notify all tunnels about it.
1785 * @param peer PeerInfo of affected peer.
1786 * @param p1 GNUNET_PEER_Id of one peer.
1787 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1790 * TODO: optimize (see below)
1793 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1796 struct MeshPeerPath *p;
1797 struct MeshPeerPath *next;
1798 struct MeshPeerInfo *peer_d;
1800 unsigned int destroyed;
1803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1805 for (p = peer->path_head; NULL != p; p = next)
1808 for (i = 0; i < (p->length - 1); i++)
1810 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1811 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1813 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1823 for (i = 0; i < peer->ntunnels; i++)
1825 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1829 peer_d = peer_get_short (d);
1830 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1831 tunnel_use_path (peer->tunnels[i], next);
1832 peer_connect (peer_d, peer->tunnels[i]);
1834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1839 * Add the path to the peer and update the path used to reach it in case this
1842 * @param peer_info Destination peer to add the path to.
1843 * @param path New path to add. Last peer must be the peer in arg 1.
1844 * Path will be either used of freed if already known.
1845 * @param trusted Do we trust that this path is real?
1848 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1851 struct MeshPeerPath *aux;
1855 if ((NULL == peer_info) || (NULL == path))
1858 path_destroy (path);
1861 if (path->peers[path->length - 1] != peer_info->id)
1864 path_destroy (path);
1867 if (2 >= path->length && GNUNET_NO == trusted)
1869 /* Only allow CORE to tell us about direct paths */
1870 path_destroy (path);
1873 for (l = 1; l < path->length; l++)
1875 if (path->peers[l] == myid)
1877 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1878 for (l2 = 0; l2 < path->length - l; l2++)
1880 path->peers[l2] = path->peers[l + l2];
1885 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1890 struct GNUNET_PeerIdentity id;
1892 GNUNET_PEER_resolve (peer_info->id, &id);
1893 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1894 path->length, GNUNET_i2s (&id));
1897 l = path_get_length (path);
1900 path_destroy (path);
1904 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1905 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1907 l2 = path_get_length (aux);
1910 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1911 peer_info->path_tail, aux, path);
1916 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1918 path_destroy (path);
1923 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1930 * Add the path to the origin peer and update the path used to reach it in case
1931 * this is the shortest.
1932 * The path is given in peer_info -> destination, therefore we turn the path
1933 * upside down first.
1935 * @param peer_info Peer to add the path to, being the origin of the path.
1936 * @param path New path to add after being inversed.
1937 * Path will be either used or freed.
1938 * @param trusted Do we trust that this path is real?
1941 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1942 struct MeshPeerPath *path, int trusted)
1945 peer_info_add_path (peer_info, path, trusted);
1950 * Add a tunnel to the list of tunnels a peer participates in.
1951 * Update the tunnel's destination.
1953 * @param p Peer to add to.
1954 * @param t Tunnel to add.
1957 peer_info_add_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1961 GNUNET_break (t->dest == p->id);
1965 GNUNET_PEER_change_rc (t->dest, 1);
1966 GNUNET_array_append (p->tunnels, p->ntunnels, t);
1971 * Remove a tunnel from the list of tunnels a peer participates in.
1972 * Free the tunnel's destination.
1974 * @param p Peer to clean.
1975 * @param t Tunnel to remove.
1978 peer_info_remove_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1982 if (t->dest == p->id)
1984 GNUNET_PEER_change_rc (t->dest, -1);
1987 for (i = 0; i < p->ntunnels; i++)
1989 if (p->tunnels[i] == t)
1991 p->tunnels[i] = p->tunnels[p->ntunnels - 1];
1992 GNUNET_array_grow (p->tunnels, p->ntunnels, p->ntunnels - 1);
2000 * Function called if the connection to the peer has been stalled for a while,
2001 * possibly due to a missed ACK. Poll the peer about its ACK status.
2003 * @param cls Closure (poll ctx).
2004 * @param tc TaskContext.
2007 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2009 struct MeshFlowControl *fc = cls;
2010 struct GNUNET_MESH_Poll msg;
2011 struct MeshTunnel *t = fc->t;
2012 GNUNET_PEER_Id peer;
2014 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2015 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2020 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n");
2022 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2024 if (fc == &t->prev_fc)
2026 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** prev peer!\n");
2029 else if (fc == &t->next_fc)
2031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** next peer!\n");
2039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** peer: %s!\n",
2040 GNUNET_i2s(GNUNET_PEER_resolve2 (peer)));
2043 if (GNUNET_YES == t->destroy)
2050 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
2051 msg.header.size = htons (sizeof (msg));
2052 msg.tid = htonl (t->id.tid);
2053 msg.pid = htonl (peer_get_first_payload_pid (peer_get_short (peer), t));
2054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** pid (%u)!\n", ntohl (msg.pid));
2055 send_prebuilt_message (&msg.header, peer, t);
2056 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
2057 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2063 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2064 * to obtain a local peer -> destination path and interning the peer ids.
2066 * @return Newly allocated and created path
2068 static struct MeshPeerPath *
2069 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2070 unsigned int get_path_length,
2071 const struct GNUNET_PeerIdentity *put_path,
2072 unsigned int put_path_length)
2074 struct MeshPeerPath *p;
2080 GNUNET_PEER_change_rc (myid, 1);
2081 i = get_path_length;
2082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2083 for (i--; i >= 0; i--)
2085 id = GNUNET_PEER_intern (&get_path[i]);
2086 if (p->length > 0 && id == p->peers[p->length - 1])
2088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2089 GNUNET_PEER_change_rc (id, -1);
2093 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2094 GNUNET_i2s (&get_path[i]));
2096 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2097 p->peers[p->length - 1] = id;
2100 i = put_path_length;
2101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2102 for (i--; i >= 0; i--)
2104 id = GNUNET_PEER_intern (&put_path[i]);
2107 /* PUT path went through us, so discard the path up until now and start
2108 * from here to get a much shorter (and loop-free) path.
2113 if (p->length > 0 && id == p->peers[p->length - 1])
2115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2116 GNUNET_PEER_change_rc (id, -1);
2120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2121 GNUNET_i2s (&put_path[i]));
2123 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2124 p->peers[p->length - 1] = id;
2128 if (get_path_length > 0)
2129 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2130 GNUNET_i2s (&get_path[0]));
2131 if (put_path_length > 0)
2132 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2133 GNUNET_i2s (&put_path[0]));
2134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2136 for (i = 0; i < p->length; i++)
2138 struct GNUNET_PeerIdentity peer_id;
2140 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2141 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2142 GNUNET_i2s (&peer_id));
2150 * Adds a path to the peer_infos of all the peers in the path
2152 * @param p Path to process.
2153 * @param confirmed Whether we know if the path works or not.
2156 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2160 /* TODO: invert and add */
2161 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2162 for (i++; i < p->length; i++)
2164 struct MeshPeerInfo *aux;
2165 struct MeshPeerPath *copy;
2167 aux = peer_get_short (p->peers[i]);
2168 copy = path_duplicate (p);
2169 copy->length = i + 1;
2170 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
2176 * Search for a tunnel among the incoming tunnels
2178 * @param tid the local id of the tunnel
2180 * @return tunnel handler, NULL if doesn't exist
2182 static struct MeshTunnel *
2183 tunnel_get_incoming (MESH_TunnelNumber tid)
2185 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2186 return GNUNET_CONTAINER_multihashmap32_get (incoming_tunnels, tid);
2191 * Search for a tunnel among the tunnels for a client
2193 * @param c the client whose tunnels to search in
2194 * @param tid the local id of the tunnel
2196 * @return tunnel handler, NULL if doesn't exist
2198 static struct MeshTunnel *
2199 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2201 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2203 GNUNET_break_op (0);
2204 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TID %X not a local tid\n", tid);
2207 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2209 return tunnel_get_incoming (tid);
2213 return GNUNET_CONTAINER_multihashmap32_get (c->own_tunnels, tid);
2219 * Search for a tunnel by global ID using PEER_ID
2221 * @param pi owner of the tunnel
2222 * @param tid global tunnel number
2224 * @return tunnel handler, NULL if doesn't exist
2226 static struct MeshTunnel *
2227 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2229 struct MESH_TunnelID id;
2230 struct GNUNET_HashCode hash;
2235 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2236 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2241 * Search for a tunnel by global ID using full PeerIdentities
2243 * @param oid owner of the tunnel
2244 * @param tid global tunnel number
2246 * @return tunnel handler, NULL if doesn't exist
2248 static struct MeshTunnel *
2249 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2251 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2256 * Change the tunnel state.
2258 * @param t Tunnel whose ttate to change.
2259 * @param state New state.
2262 tunnel_change_state (struct MeshTunnel *t, enum MeshTunnelState state)
2264 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2265 "Tunnel %s[%X] state was %s\n",
2266 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid,
2267 GNUNET_MESH_DEBUG_S2S (t->state));
2268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2269 "Tunnel %s[%X] state is now %s\n",
2270 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid,
2271 GNUNET_MESH_DEBUG_S2S (state));
2278 * Add a client to a tunnel, initializing all needed data structures.
2280 * @param t Tunnel to which add the client.
2281 * @param c Client which to add to the tunnel.
2284 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
2286 if (NULL != t->client)
2292 GNUNET_CONTAINER_multihashmap32_put (c->incoming_tunnels,
2293 t->local_tid_dest, t,
2294 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2300 GNUNET_CONTAINER_multihashmap32_put (incoming_tunnels,
2301 t->local_tid_dest, t,
2302 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2312 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
2314 unsigned int own_pos;
2316 for (own_pos = 0; own_pos < p->length; own_pos++)
2318 if (p->peers[own_pos] == myid)
2321 if (own_pos > p->length - 1)
2327 if (own_pos < p->length - 1)
2328 t->next_hop = p->peers[own_pos + 1];
2330 t->next_hop = p->peers[own_pos];
2331 GNUNET_PEER_change_rc (t->next_hop, 1);
2333 t->prev_hop = p->peers[own_pos - 1];
2335 t->prev_hop = p->peers[0];
2336 GNUNET_PEER_change_rc (t->prev_hop, 1);
2338 if (NULL != t->path)
2339 path_destroy (t->path);
2340 t->path = path_duplicate (p);
2343 if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task)
2344 GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task);
2345 t->fwd_maintenance_task =
2346 GNUNET_SCHEDULER_add_delayed (refresh_path_time,
2347 &tunnel_fwd_keepalive, t);
2353 * Notifies a tunnel that a connection has broken that affects at least
2354 * some of its peers. Sends a notification towards the root of the tree.
2355 * In case the peer is the owner of the tree, notifies the client that owns
2356 * the tunnel and tries to reconnect.
2358 * @param t Tunnel affected.
2359 * @param p1 Peer that got disconnected from p2.
2360 * @param p2 Peer that got disconnected from p1.
2362 * @return Short ID of the peer disconnected (either p1 or p2).
2363 * 0 if the tunnel remained unaffected.
2365 static GNUNET_PEER_Id
2366 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2369 // if (myid != p1 && myid != p2) FIXME
2374 // if (tree_get_predecessor (t->tree) != 0)
2376 // /* We are the peer still connected, notify owner of the disconnection. */
2377 // struct GNUNET_MESH_PathBroken msg;
2378 // struct GNUNET_PeerIdentity neighbor;
2380 // msg.header.size = htons (sizeof (msg));
2381 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2382 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2383 // msg.tid = htonl (t->id.tid);
2384 // msg.peer1 = my_full_id;
2385 // GNUNET_PEER_resolve (pid, &msg.peer2);
2386 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2387 // send_prebuilt_message (&msg.header, &neighbor, t);
2394 * Send an end-to-end FWD ACK message for the most recent in-sequence payload.
2396 * @param t Tunnel this is about.
2397 * @param fwd Is for FWD traffic? (ACK dest->owner)
2400 tunnel_send_data_ack (struct MeshTunnel *t, int fwd)
2402 struct GNUNET_MESH_DataACK msg;
2403 struct MeshTunnelReliability *rel;
2404 struct MeshReliableMessage *copy;
2409 rel = fwd ? t->bck_rel : t->fwd_rel;
2410 hop = fwd ? t->prev_hop : t->next_hop;
2411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2412 "send_data_ack for %u\n",
2415 if (GNUNET_NO == t->reliable)
2417 GNUNET_break_op (0);
2420 msg.header.type = htons (fwd ? GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK :
2421 GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK);
2422 msg.header.size = htons (sizeof (msg));
2423 msg.tid = htonl (t->id.tid);
2424 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2425 msg.mid = htonl (rel->mid_recv - 1);
2427 for (copy = rel->head_recv; NULL != copy; copy = copy->next)
2429 delta = copy->mid - rel->mid_recv;
2432 mask = 0x1LL << delta;
2433 msg.futures |= mask;
2434 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2435 " setting bit for %u (delta %u) (%llX) -> %llX\n",
2436 copy->mid, delta, mask, msg.futures);
2438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " final futures %llX\n", msg.futures);
2440 send_prebuilt_message (&msg.header, hop, t);
2441 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_data_ack END\n");
2446 * Send an ACK informing the predecessor about the available buffer space.
2447 * In case there is no predecessor, inform the owning client.
2448 * If buffering is off, send only on behalf of children or self if endpoint.
2449 * If buffering is on, send when sent to children and buffer space is free.
2450 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
2451 * the ACK itself goes "back" (towards root).
2453 * @param t Tunnel on which to send the ACK.
2454 * @param type Type of message that triggered the ACK transmission.
2455 * @param fwd Is this FWD ACK? (Going dest->owner)
2458 tunnel_send_ack (struct MeshTunnel *t, uint16_t type, int fwd)
2460 struct MeshTunnelReliability *rel;
2461 struct MeshFlowControl *next_fc;
2462 struct MeshFlowControl *prev_fc;
2463 struct MeshClient *c;
2464 struct MeshClient *o;
2470 rel = fwd ? t->fwd_rel : t->bck_rel;
2471 c = fwd ? t->client : t->owner;
2472 o = fwd ? t->owner : t->client;
2473 next_fc = fwd ? &t->next_fc : &t->prev_fc;
2474 prev_fc = fwd ? &t->prev_fc : &t->next_fc;
2475 hop = fwd ? t->prev_hop : t->next_hop;
2479 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2480 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2481 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2483 GNUNET_MESH_DEBUG_M2S (type));
2484 if (GNUNET_YES == t->nobuffer && (GNUNET_NO == t->reliable || NULL == c))
2486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
2489 if (GNUNET_YES == t->reliable && NULL != c)
2490 tunnel_send_data_ack (t, fwd);
2492 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
2493 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
2494 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2495 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2497 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2498 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2499 t->force_ack = GNUNET_YES;
2505 /* Check if we need to transmit the ACK */
2507 prev_fc->last_ack_sent - prev_fc->last_pid_recv > 3 &&
2508 GNUNET_NO == t->force_ack)
2510 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
2511 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2512 " last pid recv: %u, last ack sent: %u\n",
2513 prev_fc->last_pid_recv, prev_fc->last_ack_sent);
2517 /* Ok, ACK might be necessary, what PID to ACK? */
2518 delta = t->queue_max - next_fc->queue_n;
2519 if (NULL != o && GNUNET_YES == t->reliable && NULL != rel->head_sent)
2520 delta_mid = rel->mid_sent - rel->head_sent->mid;
2523 if (0 > delta || (GNUNET_YES == t->reliable &&
2525 (10 < rel->n_sent || 64 <= delta_mid)))
2527 if (NULL != o && delta > 1)
2529 ack = prev_fc->last_pid_recv + delta;
2530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
2531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2532 " last pid %u, last ack %u, qmax %u, q %u\n",
2533 prev_fc->last_pid_recv, prev_fc->last_ack_sent,
2534 t->queue_max, next_fc->queue_n);
2535 if (ack == prev_fc->last_ack_sent && GNUNET_NO == t->force_ack)
2537 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
2541 prev_fc->last_ack_sent = ack;
2543 send_local_ack (t, o, fwd);
2545 send_ack (t, hop, ack);
2547 GNUNET_break (GNUNET_YES == t->destroy);
2548 t->force_ack = GNUNET_NO;
2553 * Modify the mesh message TID from global to local and send to client.
2555 * @param t Tunnel on which to send the message.
2556 * @param msg Message to modify and send.
2557 * @param c Client to send to.
2558 * @param tid Tunnel ID to use (c can be both owner and client).
2561 tunnel_send_client_to_tid (struct MeshTunnel *t,
2562 const struct GNUNET_MESH_Data *msg,
2563 struct MeshClient *c, MESH_TunnelNumber tid)
2565 struct GNUNET_MESH_LocalData *copy;
2566 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
2567 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
2569 if (size < sizeof (struct GNUNET_MessageHeader))
2571 GNUNET_break_op (0);
2579 copy = (struct GNUNET_MESH_LocalData *) cbuf;
2580 memcpy (©[1], &msg[1], size);
2581 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
2582 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
2583 copy->tid = htonl (tid);
2584 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2585 ©->header, GNUNET_NO);
2589 * Modify the unicast message TID from global to local and send to client.
2591 * @param t Tunnel on which to send the message.
2592 * @param msg Message to modify and send.
2593 * @param fwd Forward?
2596 tunnel_send_client_data (struct MeshTunnel *t,
2597 const struct GNUNET_MESH_Data *msg,
2601 tunnel_send_client_to_tid (t, msg, t->client, t->local_tid_dest);
2603 tunnel_send_client_to_tid (t, msg, t->owner, t->local_tid);
2608 * Send up to 64 buffered messages to the client for in order delivery.
2610 * @param t Tunnel on which to empty the message buffer.
2611 * @param c Client to send to.
2612 * @param rel Reliability structure to corresponding peer.
2613 * If rel == t->bck_rel, this is FWD data.
2616 tunnel_send_client_buffered_data (struct MeshTunnel *t, struct MeshClient *c,
2617 struct MeshTunnelReliability *rel)
2620 struct MeshReliableMessage *copy;
2621 struct MeshReliableMessage *next;
2623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n");
2624 for (copy = rel->head_recv; NULL != copy; copy = next)
2627 if (copy->mid == rel->mid_recv)
2629 struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
2631 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2632 " have %u! now expecting %u\n",
2633 copy->mid, rel->mid_recv + 1);
2634 tunnel_send_client_data (t, msg, (rel == t->bck_rel));
2636 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2642 " don't have %u, next is %u\n",
2648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n");
2653 * We have received a message out of order, buffer it until we receive
2654 * the missing one and we can feed the rest to the client.
2656 * @param t Tunnel to add to.
2657 * @param msg Message to buffer.
2658 * @param rel Reliability data to the corresponding direction.
2661 tunnel_add_buffered_data (struct MeshTunnel *t,
2662 const struct GNUNET_MESH_Data *msg,
2663 struct MeshTunnelReliability *rel)
2665 struct MeshReliableMessage *copy;
2666 struct MeshReliableMessage *prev;
2670 size = ntohs (msg->header.size);
2671 mid = ntohl (msg->mid);
2672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data %u\n", mid);
2674 copy = GNUNET_malloc (sizeof (*copy) + size);
2677 memcpy (©[1], msg, size);
2679 // FIXME do something better than O(n), although n < 64...
2680 // FIXME start from the end (most messages are the latest ones)
2681 for (prev = rel->head_recv; NULL != prev; prev = prev->next)
2683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %u\n", prev->mid);
2684 if (GMC_is_pid_bigger (prev->mid, mid))
2686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n");
2687 GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv,
2692 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n");
2693 GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy);
2694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data END\n");
2699 * Destroy a reliable message after it has been acknowledged, either by
2700 * direct mid ACK or bitfield. Updates the appropriate data structures and
2701 * timers and frees all memory.
2703 * @param copy Message that is no longer needed: remote peer got it.
2706 tunnel_free_reliable_message (struct MeshReliableMessage *copy)
2708 struct MeshTunnelReliability *rel;
2709 struct GNUNET_TIME_Relative time;
2712 time = GNUNET_TIME_absolute_get_duration (copy->timestamp);
2713 rel->expected_delay.rel_value *= 7;
2714 rel->expected_delay.rel_value += time.rel_value;
2715 rel->expected_delay.rel_value /= 8;
2717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %u\n", copy->mid);
2718 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
2719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! took %s\n",
2720 GNUNET_STRINGS_relative_time_to_string (time, GNUNET_NO));
2721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n",
2722 GNUNET_STRINGS_relative_time_to_string (rel->expected_delay,
2724 rel->retry_timer = rel->expected_delay;
2725 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2731 * Destroy all reliable messages queued for a tunnel,
2732 * during a tunnel destruction.
2733 * Frees the reliability structure itself.
2735 * @param rel Reliability data for a tunnel.
2738 tunnel_free_reliable_all (struct MeshTunnelReliability *rel)
2740 struct MeshReliableMessage *copy;
2741 struct MeshReliableMessage *next;
2746 for (copy = rel->head_recv; NULL != copy; copy = next)
2749 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2752 for (copy = rel->head_sent; NULL != copy; copy = next)
2755 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2758 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
2759 GNUNET_SCHEDULER_cancel (rel->retry_task);
2765 * Mark future messages as ACK'd.
2767 * @param t Tunnel whose sent buffer to clean.
2768 * @param msg DataACK message with a bitfield of future ACK'd messages.
2769 * @param rel Reliability data.
2772 tunnel_free_sent_reliable (struct MeshTunnel *t,
2773 const struct GNUNET_MESH_DataACK *msg,
2774 struct MeshTunnelReliability *rel)
2776 struct MeshReliableMessage *copy;
2777 struct MeshReliableMessage *next;
2784 bitfield = msg->futures;
2785 mid = ntohl (msg->mid);
2786 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2787 "free_sent_reliable %u %llX\n",
2789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2790 " rel %p, head %p\n",
2791 rel, rel->head_sent);
2792 for (i = 0, copy = rel->head_sent;
2793 i < 64 && NULL != copy && 0 != bitfield;
2796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2797 " trying bit %u (mid %u)\n",
2800 if (0 == (bitfield & mask))
2803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n");
2804 /* Bit was set, clear the bit from the bitfield */
2807 /* The i-th bit was set. Do we have that copy? */
2808 /* Skip copies with mid < target */
2809 target = mid + i + 1;
2810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %u\n", target);
2811 while (NULL != copy && GMC_is_pid_bigger (target, copy->mid))
2814 /* Did we run out of copies? (previously freed, it's ok) */
2817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n");
2821 /* Did we overshoot the target? (previously freed, it's ok) */
2822 if (GMC_is_pid_bigger (copy->mid, target))
2824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %u\n", copy->mid);
2828 /* Now copy->mid == target, free it */
2830 tunnel_free_reliable_message (copy);
2833 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n");
2838 * We haven't received an ACK after a certain time: restransmit the message.
2840 * @param cls Closure (MeshReliableMessage with the message to restransmit)
2841 * @param tc TaskContext.
2844 tunnel_retransmit_message (void *cls,
2845 const struct GNUNET_SCHEDULER_TaskContext *tc)
2847 struct MeshTunnelReliability *rel = cls;
2848 struct MeshReliableMessage *copy;
2849 struct MeshFlowControl *fc;
2850 struct MeshPeerQueue *q;
2851 struct MeshPeerInfo *pi;
2852 struct MeshTunnel *t;
2853 struct GNUNET_MESH_Data *payload;
2856 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
2857 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2861 copy = rel->head_sent;
2868 /* Search the message to be retransmitted in the outgoing queue */
2869 payload = (struct GNUNET_MESH_Data *) ©[1];
2870 hop = rel == t->fwd_rel ? t->next_hop : t->prev_hop;
2871 fc = rel == t->fwd_rel ? &t->prev_fc : &t->next_fc;
2872 pi = peer_get_short (hop);
2873 for (q = pi->queue_head; NULL != q; q = q->next)
2875 if (ntohs (payload->header.type) == q->type)
2877 struct GNUNET_MESH_Data *queued_data = q->cls;
2879 if (queued_data->mid == payload->mid)
2884 /* Message not found in the queue */
2887 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid);
2889 fc->last_ack_sent++;
2890 fc->last_pid_recv++;
2891 payload->pid = htonl (fc->last_pid_recv);
2892 send_prebuilt_message (&payload->header, hop, t);
2893 GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
2897 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! STILL IN QUEUE %u\n", copy->mid);
2900 rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer);
2901 rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
2902 &tunnel_retransmit_message,
2908 * Send keepalive packets for a tunnel.
2910 * @param t Tunnel to keep alive..
2911 * @param fwd Is this a FWD keepalive? (owner -> dest).
2914 tunnel_keepalive (struct MeshTunnel *t, int fwd)
2916 struct GNUNET_MESH_TunnelKeepAlive *msg;
2917 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
2922 type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE :
2923 GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE;
2924 hop = fwd ? t->next_hop : t->prev_hop;
2926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2927 "sending %s keepalive for tunnel %d\n",
2928 fwd ? "FWD" : "BCK", t->id.tid);
2930 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
2931 msg->header.size = htons (size);
2932 msg->header.type = htons (type);
2933 msg->oid = *(GNUNET_PEER_resolve2 (t->id.oid));
2934 msg->tid = htonl (t->id.tid);
2935 send_prebuilt_message (&msg->header, hop, t);
2940 * Send keepalive packets for a tunnel.
2942 * @param cls Closure (tunnel for which to send the keepalive).
2943 * @param tc Notification context.
2946 tunnel_recreate (struct MeshTunnel *t, int fwd)
2948 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2949 "sending path recreate for tunnel %s[%X]\n",
2950 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
2952 send_path_create (t);
2959 * Generic tunnel timer management.
2960 * Depending on the role of the peer in the tunnel will send the
2961 * appropriate message (build or keepalive)
2963 * @param t Tunnel to maintain.
2967 tunnel_maintain (struct MeshTunnel *t, int fwd)
2971 case MESH_TUNNEL_NEW:
2973 case MESH_TUNNEL_SEARCHING:
2974 /* TODO DHT GET with RO_BART */
2976 case MESH_TUNNEL_WAITING:
2977 tunnel_recreate (t, fwd);
2979 case MESH_TUNNEL_READY:
2980 tunnel_keepalive (t, fwd);
2989 tunnel_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2991 struct MeshTunnel *t = cls;
2993 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2994 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
2998 tunnel_maintain (t, GNUNET_YES);
2999 t->fwd_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
3000 &tunnel_fwd_keepalive,
3006 tunnel_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3008 struct MeshTunnel *t = cls;
3010 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3011 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3015 tunnel_keepalive (t, GNUNET_NO);
3016 t->bck_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
3017 &tunnel_bck_keepalive,
3023 * Send a message to all peers and clients in this tunnel that the tunnel
3024 * is no longer valid. If some peer or client should not receive the message,
3025 * should be zero'ed out before calling this function.
3027 * @param t The tunnel whose peers and clients to notify.
3030 tunnel_send_destroy (struct MeshTunnel *t)
3032 struct GNUNET_MESH_TunnelDestroy msg;
3033 struct GNUNET_PeerIdentity id;
3035 msg.header.size = htons (sizeof (msg));
3036 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3037 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3038 msg.tid = htonl (t->id.tid);
3039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3040 " sending tunnel destroy for tunnel: %s [%X]\n",
3041 GNUNET_i2s (&msg.oid), t->id.tid);
3043 if (NULL == t->client && 0 != t->next_hop)
3045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
3046 GNUNET_PEER_resolve (t->next_hop, &id);
3047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3048 " sending forward to %s\n",
3050 send_prebuilt_message (&msg.header, t->next_hop, t);
3052 if (NULL == t->owner && 0 != t->prev_hop)
3054 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
3055 GNUNET_PEER_resolve (t->prev_hop, &id);
3056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3057 " sending back to %s\n",
3059 send_prebuilt_message (&msg.header, t->prev_hop, t);
3061 if (NULL != t->owner)
3063 send_local_tunnel_destroy (t, GNUNET_NO);
3065 if (NULL != t->client)
3067 send_local_tunnel_destroy (t, GNUNET_YES);
3072 tunnel_destroy (struct MeshTunnel *t)
3074 struct MeshClient *c;
3075 struct GNUNET_HashCode hash;
3084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3085 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3087 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3089 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3090 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3098 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels,
3110 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
3111 t->local_tid_dest, t))
3117 GNUNET_CONTAINER_multihashmap32_remove (incoming_tunnels,
3118 t->local_tid_dest, t))
3125 if(GNUNET_YES == t->reliable)
3127 tunnel_free_reliable_all (t->fwd_rel);
3128 tunnel_free_reliable_all (t->bck_rel);
3130 if (0 != t->prev_hop)
3132 peer_cancel_queues (t->prev_hop, t);
3133 GNUNET_PEER_change_rc (t->prev_hop, -1);
3135 if (0 != t->next_hop)
3137 peer_cancel_queues (t->next_hop, t);
3138 GNUNET_PEER_change_rc (t->next_hop, -1);
3140 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task)
3142 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3143 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3145 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task)
3147 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3148 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3151 peer_info_remove_tunnel (peer_get_short (t->dest), t);
3154 if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task)
3155 GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task);
3156 if (GNUNET_SCHEDULER_NO_TASK != t->bck_maintenance_task)
3157 GNUNET_SCHEDULER_cancel (t->bck_maintenance_task);
3160 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
3161 path_destroy (t->path);
3167 * Tunnel is empty: destroy it.
3169 * Notifies all participants (peers, cleints) about the destruction.
3171 * @param t Tunnel to destroy.
3174 tunnel_destroy_empty (struct MeshTunnel *t)
3178 struct GNUNET_PeerIdentity id;
3180 GNUNET_PEER_resolve (t->id.oid, &id);
3181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3182 "executing destruction of empty tunnel %s [%X]\n",
3183 GNUNET_i2s (&id), t->id.tid);
3187 if (GNUNET_NO == t->destroy)
3188 tunnel_send_destroy (t);
3189 if (0 == t->pending_messages)
3192 t->destroy = GNUNET_YES;
3196 * Initialize a Flow Control structure to the initial state.
3198 * @param fc Flow Control structure to initialize.
3201 fc_init (struct MeshFlowControl *fc)
3203 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
3204 fc->last_pid_recv = (uint32_t) -1;
3205 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
3206 fc->last_ack_recv = (uint32_t) -1;
3207 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3208 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
3213 * Create a new tunnel
3215 * @param owner Who is the owner of the tunnel (short ID).
3216 * @param tid Tunnel Number of the tunnel.
3217 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
3218 * @param local Tunnel Number for the tunnel, for the client point of view.
3220 * @return A new initialized tunnel. NULL on error.
3222 static struct MeshTunnel *
3223 tunnel_new (GNUNET_PEER_Id owner,
3224 MESH_TunnelNumber tid,
3225 struct MeshClient *client,
3226 MESH_TunnelNumber local)
3228 struct MeshTunnel *t;
3229 struct GNUNET_HashCode hash;
3231 if (n_tunnels >= max_tunnels && NULL == client)
3234 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3237 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
3239 fc_init (&t->next_fc);
3240 fc_init (&t->prev_fc);
3243 t->local_tid = local;
3245 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
3247 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3249 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3250 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3257 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3265 GNUNET_CONTAINER_multihashmap32_put (client->own_tunnels,
3267 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3271 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3281 * Set options in a tunnel, extracted from a bit flag field
3283 * @param t Tunnel to set options to.
3284 * @param options Bit array in host byte order.
3287 tunnel_set_options (struct MeshTunnel *t, uint32_t options)
3289 t->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
3290 GNUNET_YES : GNUNET_NO;
3291 t->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
3292 GNUNET_YES : GNUNET_NO;
3297 * Iterator for deleting each tunnel whose client endpoint disconnected.
3299 * @param cls Closure (client that has disconnected).
3300 * @param key The local tunnel id (used to access the hashmap).
3301 * @param value The value stored at the key (tunnel to destroy).
3303 * @return GNUNET_OK, keep iterating.
3306 tunnel_destroy_iterator (void *cls,
3310 struct MeshTunnel *t = value;
3311 struct MeshClient *c = cls;
3313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3314 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
3315 t->local_tid, t->local_tid_dest, c->id);
3316 client_delete_tunnel (c, t);
3319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
3321 if (0 != t->next_hop) { /* destroy could come before a path is used */
3322 GNUNET_PEER_change_rc (t->next_hop, -1);
3328 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
3330 if (0 != t->prev_hop) { /* destroy could come before a path is used */
3331 GNUNET_PEER_change_rc (t->prev_hop, -1);
3336 tunnel_destroy_empty (t);
3343 * remove client's ports from the global hashmap on diconnect.
3345 * @param cls Closure (unused).
3347 * @param value ThClient structure.
3349 * @return GNUNET_OK, keep iterating.
3352 client_release_ports (void *cls,
3358 res = GNUNET_CONTAINER_multihashmap32_remove (ports, key, value);
3359 if (GNUNET_YES != res)
3362 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3363 "Port %u by client %p was not registered.\n",
3370 * Timeout function due to lack of keepalive/traffic from the owner.
3371 * Destroys tunnel if called.
3373 * @param cls Closure (tunnel to destroy).
3374 * @param tc TaskContext
3377 tunnel_fwd_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3379 struct MeshTunnel *t = cls;
3381 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3382 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3385 "Tunnel %s [%X] FWD timed out. Destroying.\n",
3386 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3387 if (NULL != t->client)
3388 send_local_tunnel_destroy (t, GNUNET_YES);
3389 tunnel_destroy (t); /* Do not notify other */
3394 * Timeout function due to lack of keepalive/traffic from the destination.
3395 * Destroys tunnel if called.
3397 * @param cls Closure (tunnel to destroy).
3398 * @param tc TaskContext
3401 tunnel_bck_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3403 struct MeshTunnel *t = cls;
3405 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3406 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3409 "Tunnel %s [%X] BCK timed out. Destroying.\n",
3410 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3411 if (NULL != t->owner)
3412 send_local_tunnel_destroy (t, GNUNET_NO);
3413 tunnel_destroy (t); /* Do not notify other */
3418 * Resets the tunnel timeout task, some other message has done the task's job.
3419 * - For the first peer on the direction this means to send
3420 * a keepalive or a path confirmation message (either create or ACK).
3421 * - For all other peers, this means to destroy the tunnel,
3422 * due to lack of activity.
3423 * Starts the tiemout if no timeout was running (tunnel just created).
3425 * @param t Tunnel whose timeout to reset.
3426 * @param fwd Is this forward?
3428 * TODO use heap to improve efficiency of scheduler.
3431 tunnel_reset_timeout (struct MeshTunnel *t, int fwd)
3433 GNUNET_SCHEDULER_TaskIdentifier *ti;
3434 GNUNET_SCHEDULER_Task f;
3435 struct MeshClient *c;
3437 ti = fwd ? &t->fwd_maintenance_task : &t->bck_maintenance_task;
3438 c = fwd ? t->owner : t->client;
3440 if (GNUNET_SCHEDULER_NO_TASK != *ti)
3441 GNUNET_SCHEDULER_cancel (*ti);
3445 f = fwd ? &tunnel_fwd_keepalive : &tunnel_bck_keepalive;
3446 *ti = GNUNET_SCHEDULER_add_delayed (refresh_path_time, f, t);
3450 f = fwd ? &tunnel_fwd_timeout : &tunnel_bck_timeout;
3451 *ti = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3452 (refresh_path_time, 4),
3458 /******************************************************************************/
3459 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3460 /******************************************************************************/
3463 * Free a transmission that was already queued with all resources
3464 * associated to the request.
3466 * @param queue Queue handler to cancel.
3467 * @param clear_cls Is it necessary to free associated cls?
3470 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3472 struct MeshFlowControl *fc;
3474 if (GNUNET_YES == clear_cls)
3476 switch (queue->type)
3478 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3479 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3480 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3482 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3483 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3484 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3485 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3486 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3487 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3488 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3489 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3491 " prebuilt message\n");
3492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3494 GNUNET_MESH_DEBUG_M2S (queue->type));
3496 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3501 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3502 " type %s unknown!\n",
3503 GNUNET_MESH_DEBUG_M2S (queue->type));
3505 GNUNET_free_non_null (queue->cls);
3507 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3508 queue->peer->queue_tail,
3511 /* Delete from appropriate fc in the tunnel */
3512 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type ||
3513 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type )
3515 if (queue->peer->id == queue->tunnel->prev_hop)
3516 fc = &queue->tunnel->prev_fc;
3517 else if (queue->peer->id == queue->tunnel->next_hop)
3518 fc = &queue->tunnel->next_fc;
3522 GNUNET_free (queue);
3527 GNUNET_free (queue);
3532 * @brief Get the next transmittable message from the queue.
3534 * This will be the head, except in the case of being a data packet
3535 * not allowed by the destination peer.
3537 * @param peer Destination peer.
3539 * @return The next viable MeshPeerQueue element to send to that peer.
3540 * NULL when there are no transmittable messages.
3542 struct MeshPeerQueue *
3543 queue_get_next (const struct MeshPeerInfo *peer)
3545 struct MeshPeerQueue *q;
3547 struct GNUNET_MESH_Data *dmsg;
3548 struct MeshTunnel* t;
3552 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
3553 for (q = peer->queue_head; NULL != q; q = q->next)
3556 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3558 GNUNET_MESH_DEBUG_M2S (q->type));
3559 dmsg = (struct GNUNET_MESH_Data *) q->cls;
3560 pid = ntohl (dmsg->pid);
3563 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3564 ack = t->next_fc.last_ack_recv;
3566 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3567 ack = t->prev_fc.last_ack_recv;
3570 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3575 "* ACK: %u, PID: %u, MID: %u\n",
3576 ack, pid, ntohl (dmsg->mid));
3577 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
3579 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3585 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3590 "* nothing found\n");
3596 queue_send (void *cls, size_t size, void *buf)
3598 struct MeshPeerInfo *peer = cls;
3599 struct GNUNET_MessageHeader *msg;
3600 struct MeshPeerQueue *queue;
3601 struct MeshTunnel *t;
3602 struct GNUNET_PeerIdentity dst_id;
3603 struct MeshFlowControl *fc;
3608 peer->core_transmit = NULL;
3610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
3611 queue = queue_get_next (peer);
3613 /* Queue has no internal mesh traffic nor sendable payload */
3616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
3617 if (NULL == peer->queue_head)
3618 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
3621 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
3623 GNUNET_PEER_resolve (peer->id, &dst_id);
3624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3626 GNUNET_i2s (&dst_id));
3627 /* Check if buffer size is enough for the message */
3628 if (queue->size > size)
3630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3631 "* not enough room, reissue\n");
3632 peer->core_transmit =
3633 GNUNET_CORE_notify_transmit_ready (core_handle,
3636 GNUNET_TIME_UNIT_FOREVER_REL,
3643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
3646 GNUNET_assert (0 < t->pending_messages);
3647 t->pending_messages--;
3651 switch (queue->type)
3654 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3655 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3656 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3657 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3658 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3659 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3660 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3661 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3662 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3665 GNUNET_MESH_DEBUG_M2S (queue->type));
3667 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3668 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3669 data_size = send_core_data_raw (queue->cls, size, buf);
3670 msg = (struct GNUNET_MessageHeader *) buf;
3671 type = ntohs (msg->type);
3673 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
3675 data_size = send_core_path_create (queue->cls, size, buf);
3677 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3678 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
3679 data_size = send_core_path_ack (queue->cls, size, buf);
3683 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3684 "* type unknown: %u\n",
3689 if (0 < drop_percent &&
3690 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
3692 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3693 "Dropping message of type %s\n",
3694 GNUNET_MESH_DEBUG_M2S(queue->type));
3697 /* Free queue, but cls was freed by send_core_* */
3698 queue_destroy (queue, GNUNET_NO);
3700 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
3701 pid = ((struct GNUNET_MESH_Data *) buf)->pid;
3705 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3706 t->next_fc.last_pid_sent = pid;
3707 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES);
3708 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3710 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3712 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3713 t->prev_fc.last_pid_sent = pid;
3714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3716 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3717 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO);
3723 /* If more data in queue, send next */
3724 queue = queue_get_next (peer);
3727 struct GNUNET_PeerIdentity id;
3729 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
3730 GNUNET_PEER_resolve (peer->id, &id);
3731 peer->core_transmit =
3732 GNUNET_CORE_notify_transmit_ready(core_handle,
3735 GNUNET_TIME_UNIT_FOREVER_REL,
3741 if (peer->id == t->next_hop)
3743 else if (peer->id == t->prev_hop)
3748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "id: %u, next: %u, prev: %u\n",
3749 peer->id, t->next_hop, t->prev_hop);
3752 if (NULL != peer->queue_head)
3754 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task && fc->queue_n > 0)
3756 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3757 "* %s starting poll timeout\n",
3758 GNUNET_i2s (&my_full_id));
3759 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3765 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
3767 GNUNET_SCHEDULER_cancel (fc->poll_task);
3768 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3771 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3773 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
3776 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
3782 * @brief Queue and pass message to core when possible.
3784 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3785 * accounts for it. In case the queue is full, the message is dropped and
3788 * Otherwise, message is treated as internal and allowed to go regardless of
3791 * @param cls Closure (@c type dependant). It will be used by queue_send to
3792 * build the message to be sent if not already prebuilt.
3793 * @param type Type of the message, 0 for a raw message.
3794 * @param size Size of the message.
3795 * @param dst Neighbor to send message to.
3796 * @param t Tunnel this message belongs to.
3799 queue_add (void *cls, uint16_t type, size_t size,
3800 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3802 struct MeshPeerQueue *queue;
3803 struct GNUNET_PeerIdentity id;
3804 struct MeshFlowControl *fc;
3808 priority = GNUNET_NO;
3809 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3813 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3819 if (fc->queue_n >= t->queue_max)
3821 /* If this isn't a retransmission, drop the message */
3822 if (GNUNET_NO == t->reliable ||
3823 (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) ||
3824 (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type))
3826 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
3829 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3830 "queue full: %u/%u\n",
3831 fc->queue_n, t->queue_max);
3832 return; /* Drop this message */
3834 priority = GNUNET_YES;
3837 if (GMC_is_pid_bigger(fc->last_pid_sent + 1, fc->last_ack_recv) &&
3838 GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
3839 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3843 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3849 if (GNUNET_YES == priority)
3851 struct GNUNET_MESH_Data *d;
3855 GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue);
3856 d = (struct GNUNET_MESH_Data *) queue->cls;
3858 for (queue = dst->queue_tail; NULL != queue; queue = queue->prev)
3860 if (queue->type != type)
3862 d = (struct GNUNET_MESH_Data *) queue->cls;
3869 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3871 if (NULL == dst->core_transmit)
3873 GNUNET_PEER_resolve (dst->id, &id);
3874 dst->core_transmit =
3875 GNUNET_CORE_notify_transmit_ready (core_handle,
3878 GNUNET_TIME_UNIT_FOREVER_REL,
3884 t->pending_messages++;
3888 /******************************************************************************/
3889 /******************** MESH NETWORK HANDLERS **************************/
3890 /******************************************************************************/
3894 * Core handler for path creation
3896 * @param cls closure
3897 * @param message message
3898 * @param peer peer identity this notification is about
3900 * @return GNUNET_OK to keep the connection open,
3901 * GNUNET_SYSERR to close it (signal serious error)
3904 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3905 const struct GNUNET_MessageHeader *message)
3907 unsigned int own_pos;
3910 MESH_TunnelNumber tid;
3911 struct GNUNET_MESH_CreateTunnel *msg;
3912 struct GNUNET_PeerIdentity *pi;
3913 struct MeshPeerPath *path;
3914 struct MeshPeerInfo *dest_peer_info;
3915 struct MeshPeerInfo *orig_peer_info;
3916 struct MeshTunnel *t;
3918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3919 "Received a path create msg [%s]\n",
3920 GNUNET_i2s (&my_full_id));
3921 size = ntohs (message->size);
3922 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3924 GNUNET_break_op (0);
3928 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3929 if (size % sizeof (struct GNUNET_PeerIdentity))
3931 GNUNET_break_op (0);
3934 size /= sizeof (struct GNUNET_PeerIdentity);
3937 GNUNET_break_op (0);
3940 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3941 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3943 tid = ntohl (msg->tid);
3944 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3945 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3946 " path is for tunnel %s[%X]:%u.\n",
3947 GNUNET_i2s (pi), tid, ntohl (msg->port));
3948 t = tunnel_get (pi, tid);
3949 if (NULL == t) /* might be a local tunnel */
3953 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3954 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3960 t->port = ntohl (msg->port);
3961 opt = ntohl (msg->opt);
3962 if (0 != (opt & GNUNET_MESH_OPTION_NOBUFFER))
3964 t->nobuffer = GNUNET_YES;
3967 if (0 != (opt & GNUNET_MESH_OPTION_RELIABLE))
3969 t->reliable = GNUNET_YES;
3971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3973 tunnel_reset_timeout (t, GNUNET_YES);
3974 tunnel_change_state (t, MESH_TUNNEL_WAITING);
3976 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3977 if (NULL == dest_peer_info)
3979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3980 " Creating PeerInfo for destination.\n");
3981 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3982 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3983 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3985 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3987 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3988 if (NULL == orig_peer_info)
3990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3991 " Creating PeerInfo for origin.\n");
3992 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3993 orig_peer_info->id = GNUNET_PEER_intern (pi);
3994 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3995 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3998 path = path_new (size);
4000 for (i = 0; i < size; i++)
4002 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4003 GNUNET_i2s (&pi[i]));
4004 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4005 if (path->peers[i] == myid)
4008 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4009 if (own_pos == 0 && path->peers[own_pos] != myid)
4011 /* create path: self not found in path through self */
4012 GNUNET_break_op (0);
4013 path_destroy (path);
4017 path_add_to_peers (path, GNUNET_NO);
4018 tunnel_use_path (t, path);
4020 peer_info_add_tunnel (dest_peer_info, t);
4022 if (own_pos == size - 1)
4024 struct MeshClient *c;
4026 /* Find target client */
4027 c = GNUNET_CONTAINER_multihashmap32_get (ports, t->port);
4030 /* TODO send reject */
4034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4035 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
4037 /* Assign local tid */
4038 while (NULL != tunnel_get_incoming (next_local_tid))
4039 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4040 t->local_tid_dest = next_local_tid++;
4041 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4043 if (GNUNET_YES == t->reliable)
4045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
4046 t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
4048 t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
4051 tunnel_add_client (t, c);
4052 send_local_tunnel_create (t);
4054 /* Eliminate tunnel when origin dies */
4055 tunnel_reset_timeout (t, GNUNET_YES);
4056 /* Keep tunnel alive in direction dest->owner*/
4057 tunnel_reset_timeout (t, GNUNET_NO);
4061 struct MeshPeerPath *path2;
4063 t->next_hop = path->peers[own_pos + 1];
4064 GNUNET_PEER_change_rc(t->next_hop, 1);
4066 /* It's for somebody else! Retransmit. */
4067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4068 path2 = path_duplicate (path);
4069 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4070 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4071 send_path_create (t);
4079 * Core handler for path ACKs
4081 * @param cls closure
4082 * @param message message
4083 * @param peer peer identity this notification is about
4085 * @return GNUNET_OK to keep the connection open,
4086 * GNUNET_SYSERR to close it (signal serious error)
4089 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4090 const struct GNUNET_MessageHeader *message)
4092 struct GNUNET_MESH_PathACK *msg;
4093 struct MeshPeerInfo *peer_info;
4094 struct MeshPeerPath *p;
4095 struct MeshTunnel *t;
4097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4098 GNUNET_i2s (&my_full_id));
4099 msg = (struct GNUNET_MESH_PathACK *) message;
4100 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4103 /* TODO notify that we don't know the tunnel */
4104 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4105 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4106 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4109 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4110 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4112 peer_info = peer_get (&msg->peer_id);
4113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4114 GNUNET_i2s (&msg->peer_id));
4115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4118 /* Add path to peers? */
4122 path_add_to_peers (p, GNUNET_YES);
4128 tunnel_change_state (t, MESH_TUNNEL_READY);
4129 tunnel_reset_timeout (t, GNUNET_NO);
4130 t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0;
4131 t->prev_fc.last_ack_sent = ntohl (msg->ack);
4133 /* Message for us? */
4134 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4137 if (NULL == t->owner)
4139 GNUNET_break_op (0);
4142 if (NULL != peer_info->dhtget)
4144 GNUNET_DHT_get_stop (peer_info->dhtget);
4145 peer_info->dhtget = NULL;
4147 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_YES);
4148 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_NO);
4152 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4153 " not for us, retransmitting...\n");
4154 send_prebuilt_message (message, t->prev_hop, t);
4160 * Core handler for notifications of broken paths
4162 * @param cls closure
4163 * @param message message
4164 * @param peer peer identity this notification is about
4166 * @return GNUNET_OK to keep the connection open,
4167 * GNUNET_SYSERR to close it (signal serious error)
4170 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4171 const struct GNUNET_MessageHeader *message)
4173 struct GNUNET_MESH_PathBroken *msg;
4174 struct MeshTunnel *t;
4176 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4177 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4178 msg = (struct GNUNET_MESH_PathBroken *) message;
4179 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4180 GNUNET_i2s (&msg->peer1));
4181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4182 GNUNET_i2s (&msg->peer2));
4183 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4186 GNUNET_break_op (0);
4189 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4190 GNUNET_PEER_search (&msg->peer2));
4197 * Core handler for tunnel destruction
4199 * @param cls closure
4200 * @param message message
4201 * @param peer peer identity this notification is about
4203 * @return GNUNET_OK to keep the connection open,
4204 * GNUNET_SYSERR to close it (signal serious error)
4207 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4208 const struct GNUNET_MessageHeader *message)
4210 struct GNUNET_MESH_TunnelDestroy *msg;
4211 struct MeshTunnel *t;
4213 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4215 "Got a TUNNEL DESTROY packet from %s\n",
4217 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4218 " for tunnel %s [%u]\n",
4219 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4220 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4223 /* Probably already got the message from another path,
4224 * destroyed the tunnel and retransmitted to children.
4227 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
4231 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4233 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4234 t->local_tid, t->local_tid_dest);
4236 if (GNUNET_PEER_search (peer) == t->prev_hop)
4238 // TODO check owner's signature
4239 // TODO add owner's signatue to tunnel for retransmission
4240 peer_cancel_queues (t->prev_hop, t);
4241 GNUNET_PEER_change_rc (t->prev_hop, -1);
4244 else if (GNUNET_PEER_search (peer) == t->next_hop)
4246 // TODO check dest's signature
4247 // TODO add dest's signatue to tunnel for retransmission
4248 peer_cancel_queues (t->next_hop, t);
4249 GNUNET_PEER_change_rc (t->next_hop, -1);
4254 GNUNET_break_op (0);
4255 // TODO check both owner AND destination's signature to see which matches
4256 // TODO restransmit in appropriate direction
4259 tunnel_destroy_empty (t);
4261 // TODO: add timeout to destroy the tunnel anyway
4267 * Generic handler for mesh network payload traffic.
4269 * @param peer Peer identity this notification is about.
4270 * @param message Data message.
4271 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
4273 * @return GNUNET_OK to keep the connection open,
4274 * GNUNET_SYSERR to close it (signal serious error)
4277 handle_mesh_data (const struct GNUNET_PeerIdentity *peer,
4278 const struct GNUNET_MessageHeader *message,
4281 struct GNUNET_MESH_Data *msg;
4282 struct MeshFlowControl *fc;
4283 struct MeshTunnelReliability *rel;
4284 struct MeshTunnel *t;
4285 struct MeshClient *c;
4293 size = ntohs (message->size);
4295 sizeof (struct GNUNET_MESH_Data) +
4296 sizeof (struct GNUNET_MessageHeader))
4301 type =ntohs (message->type);
4302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
4303 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4304 msg = (struct GNUNET_MESH_Data *) message;
4305 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
4306 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
4308 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4311 /* TODO notify back: we don't know this tunnel */
4312 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4313 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "WARNING tunnel unknown\n");
4317 /* Initialize FWD/BCK data */
4318 pid = ntohl (msg->pid);
4319 fc = fwd ? &t->prev_fc : &t->next_fc;
4320 c = fwd ? t->client : t->owner;
4321 rel = fwd ? t->bck_rel : t->fwd_rel;
4322 hop = fwd ? t->next_hop : t->prev_hop;
4323 if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
4325 GNUNET_STATISTICS_update (stats, "# unsolicited data", 1, GNUNET_NO);
4326 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4327 "WARNING Received PID %u, (prev %u), ACK %u\n",
4328 pid, fc->last_pid_recv, fc->last_ack_sent);
4332 tunnel_change_state (t, MESH_TUNNEL_READY);
4333 tunnel_reset_timeout (t, fwd);
4336 /* TODO signature verification */
4337 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us! sending to client\n");
4338 GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
4339 if (GMC_is_pid_bigger (pid, fc->last_pid_recv))
4343 mid = ntohl (msg->mid);
4344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4345 " pid %u (mid %u) not seen yet\n", pid, mid);
4346 fc->last_pid_recv = pid;
4348 if (GNUNET_NO == t->reliable ||
4349 ( !GMC_is_pid_bigger (rel->mid_recv, mid) &&
4350 GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) )
4352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4353 "!!! RECV %u\n", ntohl (msg->mid));
4354 if (GNUNET_YES == t->reliable)
4356 /* Is this the exact next expected messasge? */
4357 if (mid == rel->mid_recv)
4359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
4361 tunnel_send_client_data (t, msg, fwd);
4362 tunnel_send_client_buffered_data (t, c, rel);
4366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
4367 tunnel_add_buffered_data (t, msg, rel);
4370 else /* Tunnel unreliable, send to clients directly */
4372 tunnel_send_client_data (t, msg, fwd);
4377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4378 " MID %u not expected (%u - %u), dropping!\n",
4379 ntohl (msg->mid), rel->mid_recv, rel->mid_recv + 64);
4384 // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
4385 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4386 " Pid %u not expected (%u+), dropping!\n",
4387 pid, fc->last_pid_recv + 1);
4389 tunnel_send_ack (t, type, fwd);
4392 fc->last_pid_recv = pid;
4395 GNUNET_STATISTICS_update (stats, "# data on dying tunnel", 1, GNUNET_NO);
4396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "data on dying tunnel %s[%X]\n",
4397 GNUNET_PEER_resolve2 (t->id.oid), ntohl (msg->tid));
4398 return GNUNET_OK; /* Next hop has destoyed the tunnel, drop */
4400 ttl = ntohl (msg->ttl);
4401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4404 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4405 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4406 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, fwd);
4412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
4413 send_prebuilt_message (message, hop, t);
4414 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4421 * Core handler for mesh network traffic going from the origin to a peer
4423 * @param cls Closure (unused).
4424 * @param message Message received.
4425 * @param peer Peer who sent the message.
4427 * @return GNUNET_OK to keep the connection open,
4428 * GNUNET_SYSERR to close it (signal serious error)
4431 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4432 const struct GNUNET_MessageHeader *message)
4434 return handle_mesh_data (peer, message, GNUNET_YES);
4438 * Core handler for mesh network traffic towards the owner of a tunnel.
4440 * @param cls Closure (unused).
4441 * @param message Message received.
4442 * @param peer Peer who sent the message.
4444 * @return GNUNET_OK to keep the connection open,
4445 * GNUNET_SYSERR to close it (signal serious error)
4448 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4449 const struct GNUNET_MessageHeader *message)
4451 return handle_mesh_data (peer, message, GNUNET_NO);
4456 * Core handler for mesh network traffic end-to-end ACKs.
4458 * @param cls Closure.
4459 * @param message Message.
4460 * @param peer Peer identity this notification is about.
4462 * @return GNUNET_OK to keep the connection open,
4463 * GNUNET_SYSERR to close it (signal serious error)
4466 handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4467 const struct GNUNET_MessageHeader *message)
4469 struct GNUNET_MESH_DataACK *msg;
4470 struct MeshTunnelReliability *rel;
4471 struct MeshReliableMessage *copy;
4472 struct MeshReliableMessage *next;
4473 struct MeshTunnel *t;
4479 type = ntohs (message->type);
4480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message from %s!\n",
4481 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4482 msg = (struct GNUNET_MESH_DataACK *) message;
4484 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4487 /* TODO notify that we dont know this tunnel (whom)? */
4488 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4491 ack = ntohl (msg->mid);
4492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4494 /* Is this a forward or backward ACK? */
4495 id = GNUNET_PEER_search (peer);
4496 if (t->next_hop == id && GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type)
4498 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4499 if (NULL == t->owner)
4501 send_prebuilt_message (message, t->prev_hop, t);
4506 else if (t->prev_hop == id && GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK == type)
4508 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4509 if (NULL == t->client)
4511 send_prebuilt_message (message, t->next_hop, t);
4518 GNUNET_break_op (0);
4522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %u\n", ack);
4523 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
4525 if (GMC_is_pid_bigger (copy->mid, ack))
4527 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
4528 tunnel_free_sent_reliable (t, msg, rel);
4532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
4534 tunnel_free_reliable_message (copy);
4536 /* Once buffers have been free'd, send ACK */
4537 tunnel_send_ack (t, type, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type);
4539 /* If some message was free'd, update the retransmission delay*/
4540 if (GNUNET_YES == work)
4542 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
4544 GNUNET_SCHEDULER_cancel (rel->retry_task);
4545 if (NULL == rel->head_sent)
4547 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
4551 struct GNUNET_TIME_Absolute new_target;
4552 struct GNUNET_TIME_Relative delay;
4554 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
4555 MESH_RETRANSMIT_MARGIN);
4556 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
4558 delay = GNUNET_TIME_absolute_get_remaining (new_target);
4560 GNUNET_SCHEDULER_add_delayed (delay,
4561 &tunnel_retransmit_message,
4572 * Core handler for mesh network traffic point-to-point acks.
4574 * @param cls closure
4575 * @param message message
4576 * @param peer peer identity this notification is about
4578 * @return GNUNET_OK to keep the connection open,
4579 * GNUNET_SYSERR to close it (signal serious error)
4582 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4583 const struct GNUNET_MessageHeader *message)
4585 struct GNUNET_MESH_ACK *msg;
4586 struct MeshTunnel *t;
4587 struct MeshFlowControl *fc;
4591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4593 msg = (struct GNUNET_MESH_ACK *) message;
4595 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4599 /* TODO notify that we dont know this tunnel (whom)? */
4600 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4603 ack = ntohl (msg->pid);
4604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4606 /* Is this a forward or backward ACK? */
4607 id = GNUNET_PEER_search (peer);
4608 if (t->next_hop == id)
4610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4613 else if (t->prev_hop == id)
4615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4620 GNUNET_break_op (0);
4624 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
4625 GMC_is_pid_bigger (ack, fc->last_ack_recv))
4627 GNUNET_SCHEDULER_cancel (fc->poll_task);
4628 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4629 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4632 fc->last_ack_recv = ack;
4633 peer_unlock_queue (id);
4634 tunnel_change_state (t, MESH_TUNNEL_READY);
4636 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, t->next_hop == id);
4643 * Core handler for mesh network traffic point-to-point ack polls.
4645 * @param cls closure
4646 * @param message message
4647 * @param peer peer identity this notification is about
4649 * @return GNUNET_OK to keep the connection open,
4650 * GNUNET_SYSERR to close it (signal serious error)
4653 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4654 const struct GNUNET_MessageHeader *message)
4656 struct GNUNET_MESH_Poll *msg;
4657 struct MeshTunnel *t;
4658 struct MeshFlowControl *fc;
4663 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
4666 msg = (struct GNUNET_MESH_Poll *) message;
4668 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4672 /* TODO notify that we dont know this tunnel (whom)? */
4673 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4674 GNUNET_break_op (0);
4678 /* Is this a forward or backward ACK? */
4679 id = GNUNET_PEER_search (peer);
4680 pid = ntohl (msg->pid);
4681 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid);
4682 if (t->next_hop == id)
4684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4686 old = fc->last_pid_recv;
4688 else if (t->prev_hop == id)
4690 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4692 old = fc->last_pid_recv;
4700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", fc->last_pid_recv);
4701 fc->last_pid_recv = pid;
4702 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, t->prev_hop == id);
4704 if (GNUNET_YES == t->reliable)
4705 fc->last_pid_recv = old;
4712 * Core handler for mesh keepalives.
4714 * @param cls closure
4715 * @param message message
4716 * @param peer peer identity this notification is about
4717 * @return GNUNET_OK to keep the connection open,
4718 * GNUNET_SYSERR to close it (signal serious error)
4720 * TODO: Check who we got this from, to validate route.
4723 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4724 const struct GNUNET_MessageHeader *message)
4726 struct GNUNET_MESH_TunnelKeepAlive *msg;
4727 struct MeshTunnel *t;
4728 struct MeshClient *c;
4732 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4736 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4739 /* TODO notify that we dont know that tunnel */
4740 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4745 fwd = GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE == ntohs (message->type) ?
4746 GNUNET_YES : GNUNET_NO;
4747 c = fwd ? t->client : t->owner;
4748 hop = fwd ? t->next_hop : t->prev_hop;
4751 tunnel_change_state (t, MESH_TUNNEL_READY);
4752 tunnel_reset_timeout (t, fwd);
4753 if (NULL != c || 0 == hop || myid == hop)
4756 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4757 send_prebuilt_message (message, hop, t);
4764 * Functions to handle messages from core
4766 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4767 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4768 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4769 sizeof (struct GNUNET_MESH_PathBroken)},
4770 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4771 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4772 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4773 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4774 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK,
4775 sizeof (struct GNUNET_MESH_DataACK)},
4776 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK,
4777 sizeof (struct GNUNET_MESH_DataACK)},
4778 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE,
4779 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4780 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE,
4781 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4782 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4783 sizeof (struct GNUNET_MESH_ACK)},
4784 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4785 sizeof (struct GNUNET_MESH_Poll)},
4786 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4787 sizeof (struct GNUNET_MESH_PathACK)},
4793 * Function to process paths received for a new peer addition. The recorded
4794 * paths form the initial tunnel, which can be optimized later.
4795 * Called on each result obtained for the DHT search.
4797 * @param cls closure
4798 * @param exp when will this value expire
4799 * @param key key of the result
4800 * @param get_path path of the get request
4801 * @param get_path_length lenght of get_path
4802 * @param put_path path of the put request
4803 * @param put_path_length length of the put_path
4804 * @param type type of the result
4805 * @param size number of bytes in data
4806 * @param data pointer to the result data
4809 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4810 const struct GNUNET_HashCode * key,
4811 const struct GNUNET_PeerIdentity *get_path,
4812 unsigned int get_path_length,
4813 const struct GNUNET_PeerIdentity *put_path,
4814 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4815 size_t size, const void *data)
4817 struct MeshPeerInfo *peer = cls;
4818 struct MeshPeerPath *p;
4819 struct GNUNET_PeerIdentity pi;
4822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4823 GNUNET_PEER_resolve (peer->id, &pi);
4824 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4826 p = path_build_from_dht (get_path, get_path_length,
4827 put_path, put_path_length);
4828 path_add_to_peers (p, GNUNET_NO);
4830 for (i = 0; i < peer->ntunnels; i++)
4832 struct GNUNET_PeerIdentity id;
4834 GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id);
4835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n",
4836 GNUNET_i2s (&id), peer->tunnels[i]->id.tid,
4837 peer->tunnels[i]->local_tid,
4838 peer->tunnels[i]->local_tid_dest);
4839 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
4841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
4842 peer_connect (peer, peer->tunnels[i]);
4850 /******************************************************************************/
4851 /********************* MESH LOCAL HANDLES **************************/
4852 /******************************************************************************/
4856 * Handler for client connection.
4858 * @param cls Closure (unused).
4859 * @param client Client handler.
4862 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
4864 struct MeshClient *c;
4868 c = GNUNET_malloc (sizeof (struct MeshClient));
4870 GNUNET_SERVER_client_keep (client);
4871 GNUNET_SERVER_client_set_user_context (client, c);
4872 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4877 * Handler for client disconnection
4879 * @param cls closure
4880 * @param client identification of the client; NULL
4881 * for the last call when the server is destroyed
4884 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4886 struct MeshClient *c;
4887 struct MeshClient *next;
4889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
4892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4896 c = client_get (client);
4899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u, %p)\n",
4901 GNUNET_SERVER_client_drop (c->handle);
4902 c->shutting_down = GNUNET_YES;
4903 if (NULL != c->own_tunnels)
4905 GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels,
4906 &tunnel_destroy_iterator, c);
4907 GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels);
4910 if (NULL != c->incoming_tunnels)
4912 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels,
4913 &tunnel_destroy_iterator, c);
4914 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels);
4917 if (NULL != c->ports)
4919 GNUNET_CONTAINER_multihashmap32_iterate (c->ports,
4920 &client_release_ports, c);
4921 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
4924 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c);
4927 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4932 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
4934 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4940 * Handler for new clients
4942 * @param cls closure
4943 * @param client identification of the client
4944 * @param message the actual message, which includes messages the client wants
4947 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4948 const struct GNUNET_MessageHeader *message)
4950 struct GNUNET_MESH_ClientConnect *cc_msg;
4951 struct MeshClient *c;
4956 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
4958 /* Check data sanity */
4959 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4960 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4961 if (0 != (size % sizeof (uint32_t)))
4964 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4967 size /= sizeof (uint32_t);
4969 /* Initialize new client structure */
4970 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
4971 c->id = next_client_id++; /* overflow not important: just for debug */
4972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
4973 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
4978 p = (uint32_t *) &cc_msg[1];
4979 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
4980 for (i = 0; i < size; i++)
4983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
4985 /* store in client's hashmap */
4986 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
4987 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4988 /* store in global hashmap */
4989 /* FIXME only allow one client to have the port open,
4990 * have a backup hashmap with waiting clients */
4991 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
4992 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4996 c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4997 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4998 GNUNET_SERVER_notification_context_add (nc, client);
4999 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
5001 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5002 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
5007 * Handler for requests of new tunnels
5009 * @param cls Closure.
5010 * @param client Identification of the client.
5011 * @param message The actual message.
5014 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
5015 const struct GNUNET_MessageHeader *message)
5017 struct GNUNET_MESH_TunnelMessage *t_msg;
5018 struct MeshPeerInfo *peer_info;
5019 struct MeshTunnel *t;
5020 struct MeshClient *c;
5021 MESH_TunnelNumber tid;
5023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
5025 /* Sanity check for client registration */
5026 if (NULL == (c = client_get (client)))
5029 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5032 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5034 /* Message size sanity check */
5035 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5038 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5042 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s:%u\n",
5044 GNUNET_i2s (&t_msg->peer), ntohl (t_msg->port));
5045 tid = ntohl (t_msg->tunnel_id);
5046 /* Sanity check for duplicate tunnel IDs */
5047 if (NULL != tunnel_get_by_local_id (c, tid))
5050 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5055 while (NULL != tunnel_get_by_pi (myid, next_tid))
5056 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5057 t = tunnel_new (myid, next_tid, c, tid);
5058 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5062 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5065 t->port = ntohl (t_msg->port);
5066 tunnel_set_options (t, ntohl (t_msg->opt));
5067 if (GNUNET_YES == t->reliable)
5069 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
5070 t->fwd_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
5072 t->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
5075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
5076 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
5078 peer_info = peer_get (&t_msg->peer);
5079 peer_info_add_tunnel (peer_info, t);
5080 peer_connect (peer_info, t);
5081 tunnel_reset_timeout (t, GNUNET_YES);
5082 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5088 * Handler for requests of deleting tunnels
5090 * @param cls closure
5091 * @param client identification of the client
5092 * @param message the actual message
5095 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
5096 const struct GNUNET_MessageHeader *message)
5098 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5099 struct MeshClient *c;
5100 struct MeshTunnel *t;
5101 MESH_TunnelNumber tid;
5103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5104 "Got a DESTROY TUNNEL from client!\n");
5106 /* Sanity check for client registration */
5107 if (NULL == (c = client_get (client)))
5110 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5115 /* Message sanity check */
5116 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5119 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5123 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5125 /* Retrieve tunnel */
5126 tid = ntohl (tunnel_msg->tunnel_id);
5127 t = tunnel_get_by_local_id (c, tid);
5130 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5132 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5136 /* Cleanup after the tunnel */
5137 client_delete_tunnel (c, t);
5138 if (c == t->client && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV <= tid)
5142 else if (c == t->owner && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV > tid)
5144 peer_info_remove_tunnel (peer_get_short (t->dest), t);
5149 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5150 " tunnel %X client %p (%p, %p)\n",
5151 tid, c, t->owner, t->client);
5155 /* The tunnel will be destroyed when the last message is transmitted. */
5156 tunnel_destroy_empty (t);
5158 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5164 * Handler for client traffic
5166 * @param cls closure
5167 * @param client identification of the client
5168 * @param message the actual message
5171 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
5172 const struct GNUNET_MessageHeader *message)
5174 struct GNUNET_MESH_LocalData *data_msg;
5175 struct MeshClient *c;
5176 struct MeshTunnel *t;
5177 struct MeshFlowControl *fc;
5178 MESH_TunnelNumber tid;
5181 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5182 "Got data from a client!\n");
5184 /* Sanity check for client registration */
5185 if (NULL == (c = client_get (client)))
5188 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5193 data_msg = (struct GNUNET_MESH_LocalData *) message;
5195 /* Sanity check for message size */
5196 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
5197 if (size < sizeof (struct GNUNET_MessageHeader))
5200 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5204 /* Tunnel exists? */
5205 tid = ntohl (data_msg->tid);
5206 t = tunnel_get_by_local_id (c, tid);
5210 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5214 /* Is the client in the tunnel? */
5215 if ( !( (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5217 t->owner->handle == client)
5219 (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5221 t->client->handle == client) ) )
5224 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5228 /* Ok, everything is correct, send the message
5229 * (pretend we got it from a mesh peer)
5232 struct GNUNET_MESH_Data *payload;
5233 char cbuf[sizeof(struct GNUNET_MESH_Data) + size];
5235 fc = tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? &t->prev_fc : &t->next_fc;
5236 if (GNUNET_YES == t->reliable)
5238 struct MeshTunnelReliability *rel;
5239 struct MeshReliableMessage *copy;
5241 rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel;
5242 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage)
5243 + sizeof(struct GNUNET_MESH_Data)
5245 copy->mid = rel->mid_sent++;
5246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->mid);
5247 copy->timestamp = GNUNET_TIME_absolute_get ();
5250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
5251 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
5252 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
5255 GNUNET_TIME_relative_multiply (rel->expected_delay,
5256 MESH_RETRANSMIT_MARGIN);
5258 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
5259 &tunnel_retransmit_message,
5262 payload = (struct GNUNET_MESH_Data *) ©[1];
5263 payload->mid = htonl (copy->mid);
5267 payload = (struct GNUNET_MESH_Data *) cbuf;
5268 payload->mid = htonl (fc->last_pid_recv + 1);
5270 memcpy (&payload[1], &data_msg[1], size);
5271 payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size);
5272 payload->header.type = htons (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ?
5273 GNUNET_MESSAGE_TYPE_MESH_UNICAST :
5274 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5275 GNUNET_PEER_resolve(t->id.oid, &payload->oid);;
5276 payload->tid = htonl (t->id.tid);
5277 payload->ttl = htonl (default_ttl);
5278 payload->pid = htonl (fc->last_pid_recv + 1);
5279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5280 " calling generic handler...\n");
5281 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5282 handle_mesh_unicast (NULL, &my_full_id, &payload->header);
5284 handle_mesh_to_orig (NULL, &my_full_id, &payload->header);
5286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
5287 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5294 * Handler for client's ACKs for payload traffic.
5296 * @param cls Closure (unused).
5297 * @param client Identification of the client.
5298 * @param message The actual message.
5301 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5302 const struct GNUNET_MessageHeader *message)
5304 struct GNUNET_MESH_LocalAck *msg;
5305 struct MeshTunnel *t;
5306 struct MeshClient *c;
5307 MESH_TunnelNumber tid;
5309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5310 /* Sanity check for client registration */
5311 if (NULL == (c = client_get (client)))
5314 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5317 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5319 msg = (struct GNUNET_MESH_LocalAck *) message;
5321 /* Tunnel exists? */
5322 tid = ntohl (msg->tunnel_id);
5323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5324 t = tunnel_get_by_local_id (c, tid);
5328 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5329 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5330 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5334 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5335 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5337 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5338 t->prev_fc.last_ack_recv++;
5339 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_NO);
5343 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5344 t->next_fc.last_ack_recv++;
5345 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_YES);
5348 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5356 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5358 * @param cls Closure (client handle).
5359 * @param key Key (hashed tunnel ID, unused).
5360 * @param value Tunnel info.
5362 * @return GNUNET_YES, to keep iterating.
5365 monitor_all_tunnels_iterator (void *cls,
5366 const struct GNUNET_HashCode * key,
5369 struct GNUNET_SERVER_Client *client = cls;
5370 struct MeshTunnel *t = value;
5371 struct GNUNET_MESH_LocalMonitor *msg;
5373 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5374 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5375 msg->tunnel_id = htonl (t->id.tid);
5376 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5377 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5378 GNUNET_PEER_resolve (t->dest, &msg->destination);
5380 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5381 "* sending info about tunnel %s [%u]\n",
5382 GNUNET_i2s (&msg->owner), t->id.tid);
5384 GNUNET_SERVER_notification_context_unicast (nc, client,
5385 &msg->header, GNUNET_NO);
5391 * Handler for client's MONITOR request.
5393 * @param cls Closure (unused).
5394 * @param client Identification of the client.
5395 * @param message The actual message.
5398 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5399 const struct GNUNET_MessageHeader *message)
5401 struct MeshClient *c;
5403 /* Sanity check for client registration */
5404 if (NULL == (c = client_get (client)))
5407 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5411 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5412 "Received get tunnels request from client %u\n",
5414 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5415 monitor_all_tunnels_iterator,
5417 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5418 "Get tunnels request from client %u completed\n",
5420 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5425 * Handler for client's MONITOR_TUNNEL request.
5427 * @param cls Closure (unused).
5428 * @param client Identification of the client.
5429 * @param message The actual message.
5432 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5433 const struct GNUNET_MessageHeader *message)
5435 const struct GNUNET_MESH_LocalMonitor *msg;
5436 struct GNUNET_MESH_LocalMonitor *resp;
5437 struct MeshClient *c;
5438 struct MeshTunnel *t;
5440 /* Sanity check for client registration */
5441 if (NULL == (c = client_get (client)))
5444 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5448 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5449 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5450 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5453 ntohl (msg->tunnel_id));
5454 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5457 /* We don't know the tunnel FIXME */
5458 struct GNUNET_MESH_LocalMonitor warn;
5461 GNUNET_SERVER_notification_context_unicast (nc, client,
5464 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5468 /* Initialize context */
5469 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5471 GNUNET_PEER_resolve (t->dest, &resp->destination);
5472 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5473 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5474 &resp->header, GNUNET_NO);
5477 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5478 "Monitor tunnel request from client %u completed\n",
5480 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5485 * Functions to handle messages from clients
5487 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5488 {&handle_local_new_client, NULL,
5489 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5490 {&handle_local_tunnel_create, NULL,
5491 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5492 sizeof (struct GNUNET_MESH_TunnelMessage)},
5493 {&handle_local_tunnel_destroy, NULL,
5494 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5495 sizeof (struct GNUNET_MESH_TunnelMessage)},
5496 {&handle_local_data, NULL,
5497 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
5498 {&handle_local_ack, NULL,
5499 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5500 sizeof (struct GNUNET_MESH_LocalAck)},
5501 {&handle_local_get_tunnels, NULL,
5502 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5503 sizeof (struct GNUNET_MessageHeader)},
5504 {&handle_local_show_tunnel, NULL,
5505 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5506 sizeof (struct GNUNET_MESH_LocalMonitor)},
5512 * Method called whenever a given peer connects.
5514 * @param cls closure
5515 * @param peer peer identity this notification is about
5518 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5520 struct MeshPeerInfo *peer_info;
5521 struct MeshPeerPath *path;
5523 DEBUG_CONN ("Peer connected\n");
5524 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5525 peer_info = peer_get (peer);
5526 if (myid == peer_info->id)
5528 DEBUG_CONN (" (self)\n");
5529 path = path_new (1);
5533 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5534 path = path_new (2);
5535 path->peers[1] = peer_info->id;
5536 GNUNET_PEER_change_rc (peer_info->id, 1);
5537 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5539 path->peers[0] = myid;
5540 GNUNET_PEER_change_rc (myid, 1);
5541 peer_info_add_path (peer_info, path, GNUNET_YES);
5547 * Method called whenever a peer disconnects.
5549 * @param cls closure
5550 * @param peer peer identity this notification is about
5553 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5555 struct MeshPeerInfo *pi;
5556 struct MeshPeerQueue *q;
5557 struct MeshPeerQueue *n;
5559 DEBUG_CONN ("Peer disconnected\n");
5560 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5570 /* TODO try to reroute this traffic instead */
5571 queue_destroy(q, GNUNET_YES);
5574 if (NULL != pi->core_transmit)
5576 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5577 pi->core_transmit = NULL;
5579 peer_info_remove_path (pi, pi->id, myid);
5582 DEBUG_CONN (" (self)\n");
5584 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5590 * Install server (service) handlers and start listening to clients.
5595 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5596 GNUNET_SERVER_connect_notify (server_handle,
5597 &handle_local_client_connect, NULL);
5598 GNUNET_SERVER_disconnect_notify (server_handle,
5599 &handle_local_client_disconnect, NULL);
5600 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5602 clients_head = NULL;
5603 clients_tail = NULL;
5605 GNUNET_SERVER_resume (server_handle);
5610 * To be called on core init/fail.
5612 * @param cls Closure (config)
5613 * @param server handle to the server for this service
5614 * @param identity the public identity of this peer
5617 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5618 const struct GNUNET_PeerIdentity *identity)
5620 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5624 GNUNET_break (core_handle == server);
5625 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5628 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5629 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5631 GNUNET_i2s (identity));
5632 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5634 GNUNET_i2s (&my_full_id));
5635 GNUNET_CORE_disconnect (core_handle);
5636 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5637 NULL, /* Closure passed to MESH functions */
5638 &core_init, /* Call core_init once connected */
5639 &core_connect, /* Handle connects */
5640 &core_disconnect, /* remove peers on disconnects */
5641 NULL, /* Don't notify about all incoming messages */
5642 GNUNET_NO, /* For header only in notification */
5643 NULL, /* Don't notify about all outbound messages */
5644 GNUNET_NO, /* For header-only out notification */
5645 core_handlers); /* Register these handlers */
5654 /******************************************************************************/
5655 /************************ MAIN FUNCTIONS ****************************/
5656 /******************************************************************************/
5659 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5661 * @param cls closure
5662 * @param key current key code
5663 * @param value value in the hash map
5664 * @return GNUNET_YES if we should continue to iterate,
5668 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5670 struct MeshTunnel *t = value;
5677 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5679 * @param cls closure
5680 * @param key current key code
5681 * @param value value in the hash map
5682 * @return GNUNET_YES if we should continue to iterate,
5686 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5688 struct MeshPeerInfo *p = value;
5689 struct MeshPeerQueue *q;
5690 struct MeshPeerQueue *n;
5698 queue_destroy(q, GNUNET_YES);
5702 peer_info_destroy (p);
5708 * Task run during shutdown.
5714 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5716 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5718 if (core_handle != NULL)
5720 GNUNET_CORE_disconnect (core_handle);
5723 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5724 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5725 if (dht_handle != NULL)
5727 GNUNET_DHT_disconnect (dht_handle);
5732 GNUNET_SERVER_notification_context_destroy (nc);
5735 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5737 GNUNET_SCHEDULER_cancel (announce_id_task);
5738 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5745 * Process mesh requests.
5747 * @param cls closure
5748 * @param server the initialized server
5749 * @param c configuration to use
5752 run (void *cls, struct GNUNET_SERVER_Handle *server,
5753 const struct GNUNET_CONFIGURATION_Handle *c)
5756 struct GNUNET_CRYPTO_EccPrivateKey *pk;
5758 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5759 server_handle = server;
5760 GNUNET_SERVER_suspend (server_handle);
5763 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5766 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5768 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5769 "mesh", "peer/privatekey");
5770 GNUNET_SCHEDULER_shutdown ();
5775 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5776 &refresh_path_time))
5778 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5780 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5781 "mesh", "refresh path time");
5782 GNUNET_SCHEDULER_shutdown ();
5787 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5790 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5792 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5793 "mesh", "id announce time");
5794 GNUNET_SCHEDULER_shutdown ();
5799 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5802 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5804 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5805 "mesh", "connect timeout");
5806 GNUNET_SCHEDULER_shutdown ();
5811 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5814 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5816 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5817 "mesh", "max msgs queue");
5818 GNUNET_SCHEDULER_shutdown ();
5823 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5826 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5828 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5829 "mesh", "max tunnels");
5830 GNUNET_SCHEDULER_shutdown ();
5835 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5838 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5840 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5841 "mesh", "default ttl", 64);
5846 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5849 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5850 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5851 "mesh", "max peers", 1000);
5856 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
5863 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5864 "Mesh is running with drop mode enabled. "
5865 "This is NOT a good idea! "
5866 "Remove the DROP_PERCENT option from your configuration.\n");
5870 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5871 &dht_replication_level))
5873 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5875 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5876 "mesh", "dht replication level", 3);
5877 dht_replication_level = 3;
5880 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5881 incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5882 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5883 ports = GNUNET_CONTAINER_multihashmap32_create (32);
5885 dht_handle = GNUNET_DHT_connect (c, 64);
5886 if (NULL == dht_handle)
5890 stats = GNUNET_STATISTICS_create ("mesh", c);
5892 /* Scheduled the task to clean up when shutdown is called */
5893 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5895 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
5896 GNUNET_free (keyfile);
5897 GNUNET_assert (NULL != pk);
5898 my_private_key = pk;
5899 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5900 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5901 &my_full_id.hashPubKey);
5902 myid = GNUNET_PEER_intern (&my_full_id);
5903 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5904 "Mesh for peer [%s] starting\n",
5905 GNUNET_i2s(&my_full_id));
5907 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5908 NULL, /* Closure passed to MESH functions */
5909 &core_init, /* Call core_init once connected */
5910 &core_connect, /* Handle connects */
5911 &core_disconnect, /* remove peers on disconnects */
5912 NULL, /* Don't notify about all incoming messages */
5913 GNUNET_NO, /* For header only in notification */
5914 NULL, /* Don't notify about all outbound messages */
5915 GNUNET_NO, /* For header-only out notification */
5916 core_handlers); /* Register these handlers */
5917 if (NULL == core_handle)
5920 GNUNET_SCHEDULER_shutdown ();
5924 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5925 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5931 * The main function for the mesh service.
5933 * @param argc number of arguments from the command line
5934 * @param argv command line arguments
5935 * @return 0 ok, 1 on error
5938 main (int argc, char *const *argv)
5943 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5944 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5946 ret = (GNUNET_OK == r) ? 0 : 1;
5947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");