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;
1704 return; /* Was local peer, 0'ed in tunnel_destroy_iterator */
1705 peer_info = peer_get_short (neighbor);
1706 for (pq = peer_info->queue_head; NULL != pq; pq = next)
1709 if (pq->tunnel == t)
1711 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
1712 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
1714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1715 "peer_cancel_queues %s\n",
1716 GNUNET_MESH_DEBUG_M2S (pq->type));
1718 queue_destroy (pq, GNUNET_YES);
1721 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
1723 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
1724 peer_info->core_transmit = NULL;
1730 * Destroy the peer_info and free any allocated resources linked to it
1732 * @param pi The peer_info to destroy.
1734 * @return GNUNET_OK on success
1737 peer_info_destroy (struct MeshPeerInfo *pi)
1739 struct GNUNET_PeerIdentity id;
1740 struct MeshPeerPath *p;
1741 struct MeshPeerPath *nextp;
1744 GNUNET_PEER_resolve (pi->id, &id);
1745 GNUNET_PEER_change_rc (pi->id, -1);
1748 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1751 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1752 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1754 if (NULL != pi->dhtget)
1756 GNUNET_DHT_get_stop (pi->dhtget);
1762 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1766 for (i = 0; i < pi->ntunnels; i++)
1767 tunnel_destroy_empty (pi->tunnels[i]);
1768 GNUNET_array_grow (pi->tunnels, pi->ntunnels, 0);
1775 * Remove all paths that rely on a direct connection between p1 and p2
1776 * from the peer itself and notify all tunnels about it.
1778 * @param peer PeerInfo of affected peer.
1779 * @param p1 GNUNET_PEER_Id of one peer.
1780 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1783 * TODO: optimize (see below)
1786 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1789 struct MeshPeerPath *p;
1790 struct MeshPeerPath *next;
1791 struct MeshPeerInfo *peer_d;
1793 unsigned int destroyed;
1796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1798 for (p = peer->path_head; NULL != p; p = next)
1801 for (i = 0; i < (p->length - 1); i++)
1803 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1804 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1806 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1816 for (i = 0; i < peer->ntunnels; i++)
1818 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1822 peer_d = peer_get_short (d);
1823 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1824 tunnel_use_path (peer->tunnels[i], next);
1825 peer_connect (peer_d, peer->tunnels[i]);
1827 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1832 * Add the path to the peer and update the path used to reach it in case this
1835 * @param peer_info Destination peer to add the path to.
1836 * @param path New path to add. Last peer must be the peer in arg 1.
1837 * Path will be either used of freed if already known.
1838 * @param trusted Do we trust that this path is real?
1841 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1844 struct MeshPeerPath *aux;
1848 if ((NULL == peer_info) || (NULL == path))
1851 path_destroy (path);
1854 if (path->peers[path->length - 1] != peer_info->id)
1857 path_destroy (path);
1860 if (2 >= path->length && GNUNET_NO == trusted)
1862 /* Only allow CORE to tell us about direct paths */
1863 path_destroy (path);
1866 for (l = 1; l < path->length; l++)
1868 if (path->peers[l] == myid)
1870 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1871 for (l2 = 0; l2 < path->length - l; l2++)
1873 path->peers[l2] = path->peers[l + l2];
1878 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1883 struct GNUNET_PeerIdentity id;
1885 GNUNET_PEER_resolve (peer_info->id, &id);
1886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1887 path->length, GNUNET_i2s (&id));
1890 l = path_get_length (path);
1893 path_destroy (path);
1897 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1898 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1900 l2 = path_get_length (aux);
1903 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1904 peer_info->path_tail, aux, path);
1909 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1911 path_destroy (path);
1916 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1923 * Add the path to the origin peer and update the path used to reach it in case
1924 * this is the shortest.
1925 * The path is given in peer_info -> destination, therefore we turn the path
1926 * upside down first.
1928 * @param peer_info Peer to add the path to, being the origin of the path.
1929 * @param path New path to add after being inversed.
1930 * Path will be either used or freed.
1931 * @param trusted Do we trust that this path is real?
1934 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1935 struct MeshPeerPath *path, int trusted)
1938 peer_info_add_path (peer_info, path, trusted);
1943 * Add a tunnel to the list of tunnels a peer participates in.
1944 * Update the tunnel's destination.
1946 * @param p Peer to add to.
1947 * @param t Tunnel to add.
1950 peer_info_add_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1954 GNUNET_break (t->dest == p->id);
1958 GNUNET_PEER_change_rc (t->dest, 1);
1959 GNUNET_array_append (p->tunnels, p->ntunnels, t);
1964 * Remove a tunnel from the list of tunnels a peer participates in.
1965 * Free the tunnel's destination.
1967 * @param p Peer to clean.
1968 * @param t Tunnel to remove.
1971 peer_info_remove_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1975 if (t->dest == p->id)
1977 GNUNET_PEER_change_rc (t->dest, -1);
1980 for (i = 0; i < p->ntunnels; i++)
1982 if (p->tunnels[i] == t)
1984 p->tunnels[i] = p->tunnels[p->ntunnels - 1];
1985 GNUNET_array_grow (p->tunnels, p->ntunnels, p->ntunnels - 1);
1993 * Function called if the connection to the peer has been stalled for a while,
1994 * possibly due to a missed ACK. Poll the peer about its ACK status.
1996 * @param cls Closure (poll ctx).
1997 * @param tc TaskContext.
2000 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2002 struct MeshFlowControl *fc = cls;
2003 struct GNUNET_MESH_Poll msg;
2004 struct MeshTunnel *t = fc->t;
2005 GNUNET_PEER_Id peer;
2007 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2008 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2013 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n");
2015 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2017 if (fc == &t->prev_fc)
2019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** prev peer!\n");
2022 else if (fc == &t->next_fc)
2024 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** next peer!\n");
2032 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** peer: %s!\n",
2033 GNUNET_i2s(GNUNET_PEER_resolve2 (peer)));
2036 if (GNUNET_YES == t->destroy)
2043 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
2044 msg.header.size = htons (sizeof (msg));
2045 msg.tid = htonl (t->id.tid);
2046 msg.pid = htonl (peer_get_first_payload_pid (peer_get_short (peer), t));
2047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** pid (%u)!\n", ntohl (msg.pid));
2048 send_prebuilt_message (&msg.header, peer, t);
2049 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
2050 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2056 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2057 * to obtain a local peer -> destination path and interning the peer ids.
2059 * @return Newly allocated and created path
2061 static struct MeshPeerPath *
2062 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2063 unsigned int get_path_length,
2064 const struct GNUNET_PeerIdentity *put_path,
2065 unsigned int put_path_length)
2067 struct MeshPeerPath *p;
2073 GNUNET_PEER_change_rc (myid, 1);
2074 i = get_path_length;
2075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2076 for (i--; i >= 0; i--)
2078 id = GNUNET_PEER_intern (&get_path[i]);
2079 if (p->length > 0 && id == p->peers[p->length - 1])
2081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2082 GNUNET_PEER_change_rc (id, -1);
2086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2087 GNUNET_i2s (&get_path[i]));
2089 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2090 p->peers[p->length - 1] = id;
2093 i = put_path_length;
2094 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2095 for (i--; i >= 0; i--)
2097 id = GNUNET_PEER_intern (&put_path[i]);
2100 /* PUT path went through us, so discard the path up until now and start
2101 * from here to get a much shorter (and loop-free) path.
2106 if (p->length > 0 && id == p->peers[p->length - 1])
2108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2109 GNUNET_PEER_change_rc (id, -1);
2113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2114 GNUNET_i2s (&put_path[i]));
2116 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2117 p->peers[p->length - 1] = id;
2121 if (get_path_length > 0)
2122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2123 GNUNET_i2s (&get_path[0]));
2124 if (put_path_length > 0)
2125 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2126 GNUNET_i2s (&put_path[0]));
2127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2129 for (i = 0; i < p->length; i++)
2131 struct GNUNET_PeerIdentity peer_id;
2133 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2135 GNUNET_i2s (&peer_id));
2143 * Adds a path to the peer_infos of all the peers in the path
2145 * @param p Path to process.
2146 * @param confirmed Whether we know if the path works or not.
2149 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2153 /* TODO: invert and add */
2154 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2155 for (i++; i < p->length; i++)
2157 struct MeshPeerInfo *aux;
2158 struct MeshPeerPath *copy;
2160 aux = peer_get_short (p->peers[i]);
2161 copy = path_duplicate (p);
2162 copy->length = i + 1;
2163 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
2169 * Search for a tunnel among the incoming tunnels
2171 * @param tid the local id of the tunnel
2173 * @return tunnel handler, NULL if doesn't exist
2175 static struct MeshTunnel *
2176 tunnel_get_incoming (MESH_TunnelNumber tid)
2178 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2179 return GNUNET_CONTAINER_multihashmap32_get (incoming_tunnels, tid);
2184 * Search for a tunnel among the tunnels for a client
2186 * @param c the client whose tunnels to search in
2187 * @param tid the local id of the tunnel
2189 * @return tunnel handler, NULL if doesn't exist
2191 static struct MeshTunnel *
2192 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2194 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2196 GNUNET_break_op (0);
2197 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TID %X not a local tid\n", tid);
2200 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2202 return tunnel_get_incoming (tid);
2206 return GNUNET_CONTAINER_multihashmap32_get (c->own_tunnels, tid);
2212 * Search for a tunnel by global ID using PEER_ID
2214 * @param pi owner of the tunnel
2215 * @param tid global tunnel number
2217 * @return tunnel handler, NULL if doesn't exist
2219 static struct MeshTunnel *
2220 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2222 struct MESH_TunnelID id;
2223 struct GNUNET_HashCode hash;
2228 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2229 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2234 * Search for a tunnel by global ID using full PeerIdentities
2236 * @param oid owner of the tunnel
2237 * @param tid global tunnel number
2239 * @return tunnel handler, NULL if doesn't exist
2241 static struct MeshTunnel *
2242 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2244 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2249 * Change the tunnel state.
2251 * @param t Tunnel whose ttate to change.
2252 * @param state New state.
2255 tunnel_change_state (struct MeshTunnel *t, enum MeshTunnelState state)
2257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2258 "Tunnel %s[%X] state was %s\n",
2259 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid,
2260 GNUNET_MESH_DEBUG_S2S (t->state));
2261 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2262 "Tunnel %s[%X] state is now %s\n",
2263 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid,
2264 GNUNET_MESH_DEBUG_S2S (state));
2271 * Add a client to a tunnel, initializing all needed data structures.
2273 * @param t Tunnel to which add the client.
2274 * @param c Client which to add to the tunnel.
2277 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
2279 if (NULL != t->client)
2285 GNUNET_CONTAINER_multihashmap32_put (c->incoming_tunnels,
2286 t->local_tid_dest, t,
2287 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2293 GNUNET_CONTAINER_multihashmap32_put (incoming_tunnels,
2294 t->local_tid_dest, t,
2295 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2305 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
2307 unsigned int own_pos;
2309 for (own_pos = 0; own_pos < p->length; own_pos++)
2311 if (p->peers[own_pos] == myid)
2314 if (own_pos > p->length - 1)
2320 if (own_pos < p->length - 1)
2321 t->next_hop = p->peers[own_pos + 1];
2323 t->next_hop = p->peers[own_pos];
2324 GNUNET_PEER_change_rc (t->next_hop, 1);
2326 t->prev_hop = p->peers[own_pos - 1];
2328 t->prev_hop = p->peers[0];
2329 GNUNET_PEER_change_rc (t->prev_hop, 1);
2331 if (NULL != t->path)
2332 path_destroy (t->path);
2333 t->path = path_duplicate (p);
2336 if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task)
2337 GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task);
2338 t->fwd_maintenance_task =
2339 GNUNET_SCHEDULER_add_delayed (refresh_path_time,
2340 &tunnel_fwd_keepalive, t);
2346 * Notifies a tunnel that a connection has broken that affects at least
2347 * some of its peers. Sends a notification towards the root of the tree.
2348 * In case the peer is the owner of the tree, notifies the client that owns
2349 * the tunnel and tries to reconnect.
2351 * @param t Tunnel affected.
2352 * @param p1 Peer that got disconnected from p2.
2353 * @param p2 Peer that got disconnected from p1.
2355 * @return Short ID of the peer disconnected (either p1 or p2).
2356 * 0 if the tunnel remained unaffected.
2358 static GNUNET_PEER_Id
2359 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2362 // if (myid != p1 && myid != p2) FIXME
2367 // if (tree_get_predecessor (t->tree) != 0)
2369 // /* We are the peer still connected, notify owner of the disconnection. */
2370 // struct GNUNET_MESH_PathBroken msg;
2371 // struct GNUNET_PeerIdentity neighbor;
2373 // msg.header.size = htons (sizeof (msg));
2374 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2375 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2376 // msg.tid = htonl (t->id.tid);
2377 // msg.peer1 = my_full_id;
2378 // GNUNET_PEER_resolve (pid, &msg.peer2);
2379 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2380 // send_prebuilt_message (&msg.header, &neighbor, t);
2387 * Send an end-to-end FWD ACK message for the most recent in-sequence payload.
2389 * @param t Tunnel this is about.
2390 * @param fwd Is for FWD traffic? (ACK dest->owner)
2393 tunnel_send_data_ack (struct MeshTunnel *t, int fwd)
2395 struct GNUNET_MESH_DataACK msg;
2396 struct MeshTunnelReliability *rel;
2397 struct MeshReliableMessage *copy;
2402 rel = fwd ? t->bck_rel : t->fwd_rel;
2403 hop = fwd ? t->prev_hop : t->next_hop;
2404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2405 "send_data_ack for %u\n",
2408 if (GNUNET_NO == t->reliable)
2410 GNUNET_break_op (0);
2413 msg.header.type = htons (fwd ? GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK :
2414 GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK);
2415 msg.header.size = htons (sizeof (msg));
2416 msg.tid = htonl (t->id.tid);
2417 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2418 msg.mid = htonl (rel->mid_recv - 1);
2420 for (copy = rel->head_recv; NULL != copy; copy = copy->next)
2422 delta = copy->mid - rel->mid_recv;
2425 mask = 0x1LL << delta;
2426 msg.futures |= mask;
2427 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2428 " setting bit for %u (delta %u) (%llX) -> %llX\n",
2429 copy->mid, delta, mask, msg.futures);
2431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " final futures %llX\n", msg.futures);
2433 send_prebuilt_message (&msg.header, hop, t);
2434 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_data_ack END\n");
2439 * Send an ACK informing the predecessor about the available buffer space.
2440 * In case there is no predecessor, inform the owning client.
2441 * If buffering is off, send only on behalf of children or self if endpoint.
2442 * If buffering is on, send when sent to children and buffer space is free.
2443 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
2444 * the ACK itself goes "back" (towards root).
2446 * @param t Tunnel on which to send the ACK.
2447 * @param type Type of message that triggered the ACK transmission.
2448 * @param fwd Is this FWD ACK? (Going dest->owner)
2451 tunnel_send_ack (struct MeshTunnel *t, uint16_t type, int fwd)
2453 struct MeshTunnelReliability *rel;
2454 struct MeshFlowControl *next_fc;
2455 struct MeshFlowControl *prev_fc;
2456 struct MeshClient *c;
2457 struct MeshClient *o;
2463 rel = fwd ? t->fwd_rel : t->bck_rel;
2464 c = fwd ? t->client : t->owner;
2465 o = fwd ? t->owner : t->client;
2466 next_fc = fwd ? &t->next_fc : &t->prev_fc;
2467 prev_fc = fwd ? &t->prev_fc : &t->next_fc;
2468 hop = fwd ? t->prev_hop : t->next_hop;
2472 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2473 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2474 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2476 GNUNET_MESH_DEBUG_M2S (type));
2477 if (GNUNET_YES == t->nobuffer && (GNUNET_NO == t->reliable || NULL == c))
2479 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
2482 if (GNUNET_YES == t->reliable && NULL != c)
2483 tunnel_send_data_ack (t, fwd);
2485 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
2486 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
2487 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2488 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2490 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2491 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2492 t->force_ack = GNUNET_YES;
2498 /* Check if we need to transmit the ACK */
2500 prev_fc->last_ack_sent - prev_fc->last_pid_recv > 3 &&
2501 GNUNET_NO == t->force_ack)
2503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
2504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2505 " last pid recv: %u, last ack sent: %u\n",
2506 prev_fc->last_pid_recv, prev_fc->last_ack_sent);
2510 /* Ok, ACK might be necessary, what PID to ACK? */
2511 delta = t->queue_max - next_fc->queue_n;
2512 if (NULL != o && GNUNET_YES == t->reliable && NULL != rel->head_sent)
2513 delta_mid = rel->mid_sent - rel->head_sent->mid;
2516 if (0 > delta || (GNUNET_YES == t->reliable &&
2518 (10 < rel->n_sent || 64 <= delta_mid)))
2520 if (NULL != o && delta > 1)
2522 ack = prev_fc->last_pid_recv + delta;
2523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
2524 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2525 " last pid %u, last ack %u, qmax %u, q %u\n",
2526 prev_fc->last_pid_recv, prev_fc->last_ack_sent,
2527 t->queue_max, next_fc->queue_n);
2528 if (ack == prev_fc->last_ack_sent && GNUNET_NO == t->force_ack)
2530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
2534 prev_fc->last_ack_sent = ack;
2536 send_local_ack (t, o, fwd);
2538 send_ack (t, hop, ack);
2540 GNUNET_break (GNUNET_YES == t->destroy);
2541 t->force_ack = GNUNET_NO;
2546 * Modify the mesh message TID from global to local and send to client.
2548 * @param t Tunnel on which to send the message.
2549 * @param msg Message to modify and send.
2550 * @param c Client to send to.
2551 * @param tid Tunnel ID to use (c can be both owner and client).
2554 tunnel_send_client_to_tid (struct MeshTunnel *t,
2555 const struct GNUNET_MESH_Data *msg,
2556 struct MeshClient *c, MESH_TunnelNumber tid)
2558 struct GNUNET_MESH_LocalData *copy;
2559 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
2560 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
2562 if (size < sizeof (struct GNUNET_MessageHeader))
2564 GNUNET_break_op (0);
2572 copy = (struct GNUNET_MESH_LocalData *) cbuf;
2573 memcpy (©[1], &msg[1], size);
2574 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
2575 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
2576 copy->tid = htonl (tid);
2577 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2578 ©->header, GNUNET_NO);
2582 * Modify the unicast message TID from global to local and send to client.
2584 * @param t Tunnel on which to send the message.
2585 * @param msg Message to modify and send.
2586 * @param fwd Forward?
2589 tunnel_send_client_data (struct MeshTunnel *t,
2590 const struct GNUNET_MESH_Data *msg,
2594 tunnel_send_client_to_tid (t, msg, t->client, t->local_tid_dest);
2596 tunnel_send_client_to_tid (t, msg, t->owner, t->local_tid);
2601 * Send up to 64 buffered messages to the client for in order delivery.
2603 * @param t Tunnel on which to empty the message buffer.
2604 * @param c Client to send to.
2605 * @param rel Reliability structure to corresponding peer.
2606 * If rel == t->bck_rel, this is FWD data.
2609 tunnel_send_client_buffered_data (struct MeshTunnel *t, struct MeshClient *c,
2610 struct MeshTunnelReliability *rel)
2613 struct MeshReliableMessage *copy;
2614 struct MeshReliableMessage *next;
2616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n");
2617 for (copy = rel->head_recv; NULL != copy; copy = next)
2620 if (copy->mid == rel->mid_recv)
2622 struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
2624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2625 " have %u! now expecting %u\n",
2626 copy->mid, rel->mid_recv + 1);
2627 tunnel_send_client_data (t, msg, (rel == t->bck_rel));
2629 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2635 " don't have %u, next is %u\n",
2641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n");
2646 * We have received a message out of order, buffer it until we receive
2647 * the missing one and we can feed the rest to the client.
2649 * @param t Tunnel to add to.
2650 * @param msg Message to buffer.
2651 * @param rel Reliability data to the corresponding direction.
2654 tunnel_add_buffered_data (struct MeshTunnel *t,
2655 const struct GNUNET_MESH_Data *msg,
2656 struct MeshTunnelReliability *rel)
2658 struct MeshReliableMessage *copy;
2659 struct MeshReliableMessage *prev;
2663 size = ntohs (msg->header.size);
2664 mid = ntohl (msg->mid);
2665 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data %u\n", mid);
2667 copy = GNUNET_malloc (sizeof (*copy) + size);
2670 memcpy (©[1], msg, size);
2672 // FIXME do something better than O(n), although n < 64...
2673 // FIXME start from the end (most messages are the latest ones)
2674 for (prev = rel->head_recv; NULL != prev; prev = prev->next)
2676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %u\n", prev->mid);
2677 if (GMC_is_pid_bigger (prev->mid, mid))
2679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n");
2680 GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv,
2685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n");
2686 GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy);
2687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data END\n");
2692 * Destroy a reliable message after it has been acknowledged, either by
2693 * direct mid ACK or bitfield. Updates the appropriate data structures and
2694 * timers and frees all memory.
2696 * @param copy Message that is no longer needed: remote peer got it.
2699 tunnel_free_reliable_message (struct MeshReliableMessage *copy)
2701 struct MeshTunnelReliability *rel;
2702 struct GNUNET_TIME_Relative time;
2705 time = GNUNET_TIME_absolute_get_duration (copy->timestamp);
2706 rel->expected_delay.rel_value *= 7;
2707 rel->expected_delay.rel_value += time.rel_value;
2708 rel->expected_delay.rel_value /= 8;
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %u\n", copy->mid);
2711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
2712 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! took %s\n",
2713 GNUNET_STRINGS_relative_time_to_string (time, GNUNET_NO));
2714 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n",
2715 GNUNET_STRINGS_relative_time_to_string (rel->expected_delay,
2717 rel->retry_timer = rel->expected_delay;
2718 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2724 * Destroy all reliable messages queued for a tunnel,
2725 * during a tunnel destruction.
2726 * Frees the reliability structure itself.
2728 * @param rel Reliability data for a tunnel.
2731 tunnel_free_reliable_all (struct MeshTunnelReliability *rel)
2733 struct MeshReliableMessage *copy;
2734 struct MeshReliableMessage *next;
2739 for (copy = rel->head_recv; NULL != copy; copy = next)
2742 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2745 for (copy = rel->head_sent; NULL != copy; copy = next)
2748 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2751 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
2752 GNUNET_SCHEDULER_cancel (rel->retry_task);
2758 * Mark future messages as ACK'd.
2760 * @param t Tunnel whose sent buffer to clean.
2761 * @param msg DataACK message with a bitfield of future ACK'd messages.
2762 * @param rel Reliability data.
2765 tunnel_free_sent_reliable (struct MeshTunnel *t,
2766 const struct GNUNET_MESH_DataACK *msg,
2767 struct MeshTunnelReliability *rel)
2769 struct MeshReliableMessage *copy;
2770 struct MeshReliableMessage *next;
2777 bitfield = msg->futures;
2778 mid = ntohl (msg->mid);
2779 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2780 "free_sent_reliable %u %llX\n",
2782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2783 " rel %p, head %p\n",
2784 rel, rel->head_sent);
2785 for (i = 0, copy = rel->head_sent;
2786 i < 64 && NULL != copy && 0 != bitfield;
2789 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2790 " trying bit %u (mid %u)\n",
2793 if (0 == (bitfield & mask))
2796 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n");
2797 /* Bit was set, clear the bit from the bitfield */
2800 /* The i-th bit was set. Do we have that copy? */
2801 /* Skip copies with mid < target */
2802 target = mid + i + 1;
2803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %u\n", target);
2804 while (NULL != copy && GMC_is_pid_bigger (target, copy->mid))
2807 /* Did we run out of copies? (previously freed, it's ok) */
2810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n");
2814 /* Did we overshoot the target? (previously freed, it's ok) */
2815 if (GMC_is_pid_bigger (copy->mid, target))
2817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %u\n", copy->mid);
2821 /* Now copy->mid == target, free it */
2823 tunnel_free_reliable_message (copy);
2826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n");
2831 * We haven't received an ACK after a certain time: restransmit the message.
2833 * @param cls Closure (MeshReliableMessage with the message to restransmit)
2834 * @param tc TaskContext.
2837 tunnel_retransmit_message (void *cls,
2838 const struct GNUNET_SCHEDULER_TaskContext *tc)
2840 struct MeshTunnelReliability *rel = cls;
2841 struct MeshReliableMessage *copy;
2842 struct MeshFlowControl *fc;
2843 struct MeshPeerQueue *q;
2844 struct MeshPeerInfo *pi;
2845 struct MeshTunnel *t;
2846 struct GNUNET_MESH_Data *payload;
2849 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
2850 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2854 copy = rel->head_sent;
2861 /* Search the message to be retransmitted in the outgoing queue */
2862 payload = (struct GNUNET_MESH_Data *) ©[1];
2863 hop = rel == t->fwd_rel ? t->next_hop : t->prev_hop;
2864 fc = rel == t->fwd_rel ? &t->prev_fc : &t->next_fc;
2865 pi = peer_get_short (hop);
2866 for (q = pi->queue_head; NULL != q; q = q->next)
2868 if (ntohs (payload->header.type) == q->type)
2870 struct GNUNET_MESH_Data *queued_data = q->cls;
2872 if (queued_data->mid == payload->mid)
2877 /* Message not found in the queue */
2880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid);
2882 fc->last_ack_sent++;
2883 fc->last_pid_recv++;
2884 payload->pid = htonl (fc->last_pid_recv);
2885 send_prebuilt_message (&payload->header, hop, t);
2886 GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
2890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! STILL IN QUEUE %u\n", copy->mid);
2893 rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer);
2894 rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
2895 &tunnel_retransmit_message,
2901 * Send keepalive packets for a tunnel.
2903 * @param t Tunnel to keep alive..
2904 * @param fwd Is this a FWD keepalive? (owner -> dest).
2907 tunnel_keepalive (struct MeshTunnel *t, int fwd)
2909 struct GNUNET_MESH_TunnelKeepAlive *msg;
2910 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
2915 type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE :
2916 GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE;
2917 hop = fwd ? t->next_hop : t->prev_hop;
2919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2920 "sending %s keepalive for tunnel %d\n",
2921 fwd ? "FWD" : "BCK", t->id.tid);
2923 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
2924 msg->header.size = htons (size);
2925 msg->header.type = htons (type);
2926 msg->oid = *(GNUNET_PEER_resolve2 (t->id.oid));
2927 msg->tid = htonl (t->id.tid);
2928 send_prebuilt_message (&msg->header, hop, t);
2933 * Send keepalive packets for a tunnel.
2935 * @param cls Closure (tunnel for which to send the keepalive).
2936 * @param tc Notification context.
2939 tunnel_recreate (struct MeshTunnel *t, int fwd)
2941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2942 "sending path recreate for tunnel %s[%X]\n",
2943 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
2945 send_path_create (t);
2952 * Generic tunnel timer management.
2953 * Depending on the role of the peer in the tunnel will send the
2954 * appropriate message (build or keepalive)
2956 * @param t Tunnel to maintain.
2960 tunnel_maintain (struct MeshTunnel *t, int fwd)
2964 case MESH_TUNNEL_NEW:
2966 case MESH_TUNNEL_SEARCHING:
2967 /* TODO DHT GET with RO_BART */
2969 case MESH_TUNNEL_WAITING:
2970 tunnel_recreate (t, fwd);
2972 case MESH_TUNNEL_READY:
2973 tunnel_keepalive (t, fwd);
2982 tunnel_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2984 struct MeshTunnel *t = cls;
2986 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2987 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
2991 tunnel_maintain (t, GNUNET_YES);
2992 t->fwd_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
2993 &tunnel_fwd_keepalive,
2999 tunnel_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3001 struct MeshTunnel *t = cls;
3003 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3004 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3008 tunnel_keepalive (t, GNUNET_NO);
3009 t->bck_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
3010 &tunnel_bck_keepalive,
3016 * Send a message to all peers and clients in this tunnel that the tunnel
3017 * is no longer valid. If some peer or client should not receive the message,
3018 * should be zero'ed out before calling this function.
3020 * @param t The tunnel whose peers and clients to notify.
3023 tunnel_send_destroy (struct MeshTunnel *t)
3025 struct GNUNET_MESH_TunnelDestroy msg;
3026 struct GNUNET_PeerIdentity id;
3028 msg.header.size = htons (sizeof (msg));
3029 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3030 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3031 msg.tid = htonl (t->id.tid);
3032 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3033 " sending tunnel destroy for tunnel: %s [%X]\n",
3034 GNUNET_i2s (&msg.oid), t->id.tid);
3036 if (NULL == t->client && 0 != t->next_hop)
3038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
3039 GNUNET_PEER_resolve (t->next_hop, &id);
3040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3041 " sending forward to %s\n",
3043 send_prebuilt_message (&msg.header, t->next_hop, t);
3045 if (NULL == t->owner && 0 != t->prev_hop)
3047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
3048 GNUNET_PEER_resolve (t->prev_hop, &id);
3049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3050 " sending back to %s\n",
3052 send_prebuilt_message (&msg.header, t->prev_hop, t);
3054 if (NULL != t->owner)
3056 send_local_tunnel_destroy (t, GNUNET_NO);
3058 if (NULL != t->client)
3060 send_local_tunnel_destroy (t, GNUNET_YES);
3065 tunnel_destroy (struct MeshTunnel *t)
3067 struct MeshClient *c;
3068 struct GNUNET_HashCode hash;
3077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3078 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3082 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3083 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3091 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels,
3103 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
3104 t->local_tid_dest, t))
3110 GNUNET_CONTAINER_multihashmap32_remove (incoming_tunnels,
3111 t->local_tid_dest, t))
3118 if(GNUNET_YES == t->reliable)
3120 tunnel_free_reliable_all (t->fwd_rel);
3121 tunnel_free_reliable_all (t->bck_rel);
3123 if (0 != t->prev_hop)
3125 peer_cancel_queues (t->prev_hop, t);
3126 GNUNET_PEER_change_rc (t->prev_hop, -1);
3128 if (0 != t->next_hop)
3130 peer_cancel_queues (t->next_hop, t);
3131 GNUNET_PEER_change_rc (t->next_hop, -1);
3133 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task)
3135 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3136 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3138 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task)
3140 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3141 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3144 peer_info_remove_tunnel (peer_get_short (t->dest), t);
3147 if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task)
3148 GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task);
3149 if (GNUNET_SCHEDULER_NO_TASK != t->bck_maintenance_task)
3150 GNUNET_SCHEDULER_cancel (t->bck_maintenance_task);
3153 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
3154 path_destroy (t->path);
3160 * Tunnel is empty: destroy it.
3162 * Notifies all participants (peers, cleints) about the destruction.
3164 * @param t Tunnel to destroy.
3167 tunnel_destroy_empty (struct MeshTunnel *t)
3171 struct GNUNET_PeerIdentity id;
3173 GNUNET_PEER_resolve (t->id.oid, &id);
3174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3175 "executing destruction of empty tunnel %s [%X]\n",
3176 GNUNET_i2s (&id), t->id.tid);
3180 if (GNUNET_NO == t->destroy)
3181 tunnel_send_destroy (t);
3182 if (0 == t->pending_messages)
3185 t->destroy = GNUNET_YES;
3189 * Initialize a Flow Control structure to the initial state.
3191 * @param fc Flow Control structure to initialize.
3194 fc_init (struct MeshFlowControl *fc)
3196 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
3197 fc->last_pid_recv = (uint32_t) -1;
3198 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
3199 fc->last_ack_recv = (uint32_t) -1;
3200 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3201 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
3206 * Create a new tunnel
3208 * @param owner Who is the owner of the tunnel (short ID).
3209 * @param tid Tunnel Number of the tunnel.
3210 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
3211 * @param local Tunnel Number for the tunnel, for the client point of view.
3213 * @return A new initialized tunnel. NULL on error.
3215 static struct MeshTunnel *
3216 tunnel_new (GNUNET_PEER_Id owner,
3217 MESH_TunnelNumber tid,
3218 struct MeshClient *client,
3219 MESH_TunnelNumber local)
3221 struct MeshTunnel *t;
3222 struct GNUNET_HashCode hash;
3224 if (n_tunnels >= max_tunnels && NULL == client)
3227 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3230 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
3232 fc_init (&t->next_fc);
3233 fc_init (&t->prev_fc);
3236 t->local_tid = local;
3238 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
3240 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3242 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3243 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3250 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3258 GNUNET_CONTAINER_multihashmap32_put (client->own_tunnels,
3260 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3264 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3274 * Set options in a tunnel, extracted from a bit flag field
3276 * @param t Tunnel to set options to.
3277 * @param options Bit array in host byte order.
3280 tunnel_set_options (struct MeshTunnel *t, uint32_t options)
3282 t->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
3283 GNUNET_YES : GNUNET_NO;
3284 t->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
3285 GNUNET_YES : GNUNET_NO;
3290 * Iterator for deleting each tunnel whose client endpoint disconnected.
3292 * @param cls Closure (client that has disconnected).
3293 * @param key The local tunnel id (used to access the hashmap).
3294 * @param value The value stored at the key (tunnel to destroy).
3296 * @return GNUNET_OK, keep iterating.
3299 tunnel_destroy_iterator (void *cls,
3303 struct MeshTunnel *t = value;
3304 struct MeshClient *c = cls;
3306 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3307 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
3308 t->local_tid, t->local_tid_dest, c->id);
3309 client_delete_tunnel (c, t);
3312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
3314 if (0 != t->next_hop) { /* destroy could come before a path is used */
3315 GNUNET_PEER_change_rc (t->next_hop, -1);
3321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
3323 if (0 != t->prev_hop) { /* destroy could come before a path is used */
3324 GNUNET_PEER_change_rc (t->prev_hop, -1);
3329 tunnel_destroy_empty (t);
3336 * remove client's ports from the global hashmap on diconnect.
3338 * @param cls Closure (unused).
3340 * @param value ThClient structure.
3342 * @return GNUNET_OK, keep iterating.
3345 client_release_ports (void *cls,
3351 res = GNUNET_CONTAINER_multihashmap32_remove (ports, key, value);
3352 if (GNUNET_YES != res)
3355 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3356 "Port %u by client %p was not registered.\n",
3363 * Timeout function due to lack of keepalive/traffic from the owner.
3364 * Destroys tunnel if called.
3366 * @param cls Closure (tunnel to destroy).
3367 * @param tc TaskContext
3370 tunnel_fwd_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3372 struct MeshTunnel *t = cls;
3374 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3375 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3377 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3378 "Tunnel %s [%X] FWD timed out. Destroying.\n",
3379 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3380 if (NULL != t->client)
3381 send_local_tunnel_destroy (t, GNUNET_YES);
3382 tunnel_destroy (t); /* Do not notify other */
3387 * Timeout function due to lack of keepalive/traffic from the destination.
3388 * Destroys tunnel if called.
3390 * @param cls Closure (tunnel to destroy).
3391 * @param tc TaskContext
3394 tunnel_bck_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3396 struct MeshTunnel *t = cls;
3398 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3399 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3402 "Tunnel %s [%X] BCK timed out. Destroying.\n",
3403 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3404 if (NULL != t->owner)
3405 send_local_tunnel_destroy (t, GNUNET_NO);
3406 tunnel_destroy (t); /* Do not notify other */
3411 * Resets the tunnel timeout task, some other message has done the task's job.
3412 * - For the first peer on the direction this means to send
3413 * a keepalive or a path confirmation message (either create or ACK).
3414 * - For all other peers, this means to destroy the tunnel,
3415 * due to lack of activity.
3416 * Starts the tiemout if no timeout was running (tunnel just created).
3418 * @param t Tunnel whose timeout to reset.
3419 * @param fwd Is this forward?
3421 * TODO use heap to improve efficiency of scheduler.
3424 tunnel_reset_timeout (struct MeshTunnel *t, int fwd)
3426 GNUNET_SCHEDULER_TaskIdentifier *ti;
3427 GNUNET_SCHEDULER_Task f;
3428 struct MeshClient *c;
3430 ti = fwd ? &t->fwd_maintenance_task : &t->bck_maintenance_task;
3431 c = fwd ? t->owner : t->client;
3433 if (GNUNET_SCHEDULER_NO_TASK != *ti)
3434 GNUNET_SCHEDULER_cancel (*ti);
3438 f = fwd ? &tunnel_fwd_keepalive : &tunnel_bck_keepalive;
3439 *ti = GNUNET_SCHEDULER_add_delayed (refresh_path_time, f, t);
3443 f = fwd ? &tunnel_fwd_timeout : &tunnel_bck_timeout;
3444 *ti = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3445 (refresh_path_time, 4),
3451 /******************************************************************************/
3452 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3453 /******************************************************************************/
3456 * Free a transmission that was already queued with all resources
3457 * associated to the request.
3459 * @param queue Queue handler to cancel.
3460 * @param clear_cls Is it necessary to free associated cls?
3463 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3465 struct MeshFlowControl *fc;
3467 if (GNUNET_YES == clear_cls)
3469 switch (queue->type)
3471 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3472 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3473 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3475 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3476 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3477 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3478 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3479 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3480 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3481 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3482 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3483 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3484 " prebuilt message\n");
3485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3487 GNUNET_MESH_DEBUG_M2S (queue->type));
3489 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3494 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3495 " type %s unknown!\n",
3496 GNUNET_MESH_DEBUG_M2S (queue->type));
3498 GNUNET_free_non_null (queue->cls);
3500 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3501 queue->peer->queue_tail,
3504 /* Delete from appropriate fc in the tunnel */
3505 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type ||
3506 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type )
3508 if (queue->peer->id == queue->tunnel->prev_hop)
3509 fc = &queue->tunnel->prev_fc;
3510 else if (queue->peer->id == queue->tunnel->next_hop)
3511 fc = &queue->tunnel->next_fc;
3515 GNUNET_free (queue);
3520 GNUNET_free (queue);
3525 * @brief Get the next transmittable message from the queue.
3527 * This will be the head, except in the case of being a data packet
3528 * not allowed by the destination peer.
3530 * @param peer Destination peer.
3532 * @return The next viable MeshPeerQueue element to send to that peer.
3533 * NULL when there are no transmittable messages.
3535 struct MeshPeerQueue *
3536 queue_get_next (const struct MeshPeerInfo *peer)
3538 struct MeshPeerQueue *q;
3540 struct GNUNET_MESH_Data *dmsg;
3541 struct MeshTunnel* t;
3545 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
3546 for (q = peer->queue_head; NULL != q; q = q->next)
3549 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3551 GNUNET_MESH_DEBUG_M2S (q->type));
3552 dmsg = (struct GNUNET_MESH_Data *) q->cls;
3553 pid = ntohl (dmsg->pid);
3556 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3557 ack = t->next_fc.last_ack_recv;
3559 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3560 ack = t->prev_fc.last_ack_recv;
3563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3567 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3568 "* ACK: %u, PID: %u, MID: %u\n",
3569 ack, pid, ntohl (dmsg->mid));
3570 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
3572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3578 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3583 "* nothing found\n");
3589 queue_send (void *cls, size_t size, void *buf)
3591 struct MeshPeerInfo *peer = cls;
3592 struct GNUNET_MessageHeader *msg;
3593 struct MeshPeerQueue *queue;
3594 struct MeshTunnel *t;
3595 struct GNUNET_PeerIdentity dst_id;
3596 struct MeshFlowControl *fc;
3601 peer->core_transmit = NULL;
3603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
3604 queue = queue_get_next (peer);
3606 /* Queue has no internal mesh traffic nor sendable payload */
3609 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
3610 if (NULL == peer->queue_head)
3611 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
3614 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
3616 GNUNET_PEER_resolve (peer->id, &dst_id);
3617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3619 GNUNET_i2s (&dst_id));
3620 /* Check if buffer size is enough for the message */
3621 if (queue->size > size)
3623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3624 "* not enough room, reissue\n");
3625 peer->core_transmit =
3626 GNUNET_CORE_notify_transmit_ready (core_handle,
3629 GNUNET_TIME_UNIT_FOREVER_REL,
3636 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
3639 GNUNET_assert (0 < t->pending_messages);
3640 t->pending_messages--;
3644 switch (queue->type)
3647 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3648 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3649 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3650 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3651 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3652 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3653 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3654 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3655 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3658 GNUNET_MESH_DEBUG_M2S (queue->type));
3660 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3661 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3662 data_size = send_core_data_raw (queue->cls, size, buf);
3663 msg = (struct GNUNET_MessageHeader *) buf;
3664 type = ntohs (msg->type);
3666 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
3668 data_size = send_core_path_create (queue->cls, size, buf);
3670 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
3672 data_size = send_core_path_ack (queue->cls, size, buf);
3676 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3677 "* type unknown: %u\n",
3682 if (0 < drop_percent &&
3683 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
3685 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3686 "Dropping message of type %s\n",
3687 GNUNET_MESH_DEBUG_M2S(queue->type));
3690 /* Free queue, but cls was freed by send_core_* */
3691 queue_destroy (queue, GNUNET_NO);
3693 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
3694 pid = ((struct GNUNET_MESH_Data *) buf)->pid;
3698 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3699 t->next_fc.last_pid_sent = pid;
3700 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES);
3701 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3703 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3705 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3706 t->prev_fc.last_pid_sent = pid;
3707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3709 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3710 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO);
3716 /* If more data in queue, send next */
3717 queue = queue_get_next (peer);
3720 struct GNUNET_PeerIdentity id;
3722 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
3723 GNUNET_PEER_resolve (peer->id, &id);
3724 peer->core_transmit =
3725 GNUNET_CORE_notify_transmit_ready(core_handle,
3728 GNUNET_TIME_UNIT_FOREVER_REL,
3734 if (peer->id == t->next_hop)
3736 else if (peer->id == t->prev_hop)
3741 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "id: %u, next: %u, prev: %u\n",
3742 peer->id, t->next_hop, t->prev_hop);
3745 if (NULL != peer->queue_head)
3747 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task && fc->queue_n > 0)
3749 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3750 "* %s starting poll timeout\n",
3751 GNUNET_i2s (&my_full_id));
3752 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3758 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
3760 GNUNET_SCHEDULER_cancel (fc->poll_task);
3761 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3764 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3766 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
3769 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
3775 * @brief Queue and pass message to core when possible.
3777 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3778 * accounts for it. In case the queue is full, the message is dropped and
3781 * Otherwise, message is treated as internal and allowed to go regardless of
3784 * @param cls Closure (@c type dependant). It will be used by queue_send to
3785 * build the message to be sent if not already prebuilt.
3786 * @param type Type of the message, 0 for a raw message.
3787 * @param size Size of the message.
3788 * @param dst Neighbor to send message to.
3789 * @param t Tunnel this message belongs to.
3792 queue_add (void *cls, uint16_t type, size_t size,
3793 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3795 struct MeshPeerQueue *queue;
3796 struct GNUNET_PeerIdentity id;
3797 struct MeshFlowControl *fc;
3801 priority = GNUNET_NO;
3802 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3806 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3812 if (fc->queue_n >= t->queue_max)
3814 /* If this isn't a retransmission, drop the message */
3815 if (GNUNET_NO == t->reliable ||
3816 (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) ||
3817 (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type))
3819 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
3822 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3823 "queue full: %u/%u\n",
3824 fc->queue_n, t->queue_max);
3825 return; /* Drop this message */
3827 priority = GNUNET_YES;
3830 if (GMC_is_pid_bigger(fc->last_pid_sent + 1, fc->last_ack_recv) &&
3831 GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
3832 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3836 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3842 if (GNUNET_YES == priority)
3844 struct GNUNET_MESH_Data *d;
3848 GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue);
3849 d = (struct GNUNET_MESH_Data *) queue->cls;
3851 for (queue = dst->queue_tail; NULL != queue; queue = queue->prev)
3853 if (queue->type != type)
3855 d = (struct GNUNET_MESH_Data *) queue->cls;
3862 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3864 if (NULL == dst->core_transmit)
3866 GNUNET_PEER_resolve (dst->id, &id);
3867 dst->core_transmit =
3868 GNUNET_CORE_notify_transmit_ready (core_handle,
3871 GNUNET_TIME_UNIT_FOREVER_REL,
3877 t->pending_messages++;
3881 /******************************************************************************/
3882 /******************** MESH NETWORK HANDLERS **************************/
3883 /******************************************************************************/
3887 * Core handler for path creation
3889 * @param cls closure
3890 * @param message message
3891 * @param peer peer identity this notification is about
3893 * @return GNUNET_OK to keep the connection open,
3894 * GNUNET_SYSERR to close it (signal serious error)
3897 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3898 const struct GNUNET_MessageHeader *message)
3900 unsigned int own_pos;
3903 MESH_TunnelNumber tid;
3904 struct GNUNET_MESH_CreateTunnel *msg;
3905 struct GNUNET_PeerIdentity *pi;
3906 struct MeshPeerPath *path;
3907 struct MeshPeerInfo *dest_peer_info;
3908 struct MeshPeerInfo *orig_peer_info;
3909 struct MeshTunnel *t;
3911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3912 "Received a path create msg [%s]\n",
3913 GNUNET_i2s (&my_full_id));
3914 size = ntohs (message->size);
3915 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3917 GNUNET_break_op (0);
3921 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3922 if (size % sizeof (struct GNUNET_PeerIdentity))
3924 GNUNET_break_op (0);
3927 size /= sizeof (struct GNUNET_PeerIdentity);
3930 GNUNET_break_op (0);
3933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3934 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3936 tid = ntohl (msg->tid);
3937 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3938 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3939 " path is for tunnel %s[%X]:%u.\n",
3940 GNUNET_i2s (pi), tid, ntohl (msg->port));
3941 t = tunnel_get (pi, tid);
3942 if (NULL == t) /* might be a local tunnel */
3946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3947 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3953 t->port = ntohl (msg->port);
3954 opt = ntohl (msg->opt);
3955 if (0 != (opt & GNUNET_MESH_OPTION_NOBUFFER))
3957 t->nobuffer = GNUNET_YES;
3960 if (0 != (opt & GNUNET_MESH_OPTION_RELIABLE))
3962 t->reliable = GNUNET_YES;
3964 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3966 tunnel_reset_timeout (t, GNUNET_YES);
3967 tunnel_change_state (t, MESH_TUNNEL_WAITING);
3969 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3970 if (NULL == dest_peer_info)
3972 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3973 " Creating PeerInfo for destination.\n");
3974 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3975 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3976 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3978 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3980 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3981 if (NULL == orig_peer_info)
3983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3984 " Creating PeerInfo for origin.\n");
3985 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3986 orig_peer_info->id = GNUNET_PEER_intern (pi);
3987 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3988 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3991 path = path_new (size);
3993 for (i = 0; i < size; i++)
3995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3996 GNUNET_i2s (&pi[i]));
3997 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3998 if (path->peers[i] == myid)
4001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4002 if (own_pos == 0 && path->peers[own_pos] != myid)
4004 /* create path: self not found in path through self */
4005 GNUNET_break_op (0);
4006 path_destroy (path);
4010 path_add_to_peers (path, GNUNET_NO);
4011 tunnel_use_path (t, path);
4013 peer_info_add_tunnel (dest_peer_info, t);
4015 if (own_pos == size - 1)
4017 struct MeshClient *c;
4019 /* Find target client */
4020 c = GNUNET_CONTAINER_multihashmap32_get (ports, t->port);
4023 /* TODO send reject */
4027 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4028 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
4030 /* Assign local tid */
4031 while (NULL != tunnel_get_incoming (next_local_tid))
4032 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4033 t->local_tid_dest = next_local_tid++;
4034 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4036 if (GNUNET_YES == t->reliable)
4038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
4039 t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
4041 t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
4044 tunnel_add_client (t, c);
4045 send_local_tunnel_create (t);
4047 /* Eliminate tunnel when origin dies */
4048 tunnel_reset_timeout (t, GNUNET_YES);
4049 /* Keep tunnel alive in direction dest->owner*/
4050 tunnel_reset_timeout (t, GNUNET_NO);
4054 struct MeshPeerPath *path2;
4056 t->next_hop = path->peers[own_pos + 1];
4057 GNUNET_PEER_change_rc(t->next_hop, 1);
4059 /* It's for somebody else! Retransmit. */
4060 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4061 path2 = path_duplicate (path);
4062 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4063 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4064 send_path_create (t);
4072 * Core handler for path ACKs
4074 * @param cls closure
4075 * @param message message
4076 * @param peer peer identity this notification is about
4078 * @return GNUNET_OK to keep the connection open,
4079 * GNUNET_SYSERR to close it (signal serious error)
4082 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4083 const struct GNUNET_MessageHeader *message)
4085 struct GNUNET_MESH_PathACK *msg;
4086 struct MeshPeerInfo *peer_info;
4087 struct MeshPeerPath *p;
4088 struct MeshTunnel *t;
4090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4091 GNUNET_i2s (&my_full_id));
4092 msg = (struct GNUNET_MESH_PathACK *) message;
4093 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4096 /* TODO notify that we don't know the tunnel */
4097 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4099 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4102 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4103 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4105 peer_info = peer_get (&msg->peer_id);
4106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4107 GNUNET_i2s (&msg->peer_id));
4108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4111 /* Add path to peers? */
4115 path_add_to_peers (p, GNUNET_YES);
4121 tunnel_change_state (t, MESH_TUNNEL_READY);
4122 tunnel_reset_timeout (t, GNUNET_NO);
4123 t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0;
4124 t->prev_fc.last_ack_sent = ntohl (msg->ack);
4126 /* Message for us? */
4127 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4129 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4130 if (NULL == t->owner)
4132 GNUNET_break_op (0);
4135 if (NULL != peer_info->dhtget)
4137 GNUNET_DHT_get_stop (peer_info->dhtget);
4138 peer_info->dhtget = NULL;
4140 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_YES);
4141 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_NO);
4145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4146 " not for us, retransmitting...\n");
4147 send_prebuilt_message (message, t->prev_hop, t);
4153 * Core handler for notifications of broken paths
4155 * @param cls closure
4156 * @param message message
4157 * @param peer peer identity this notification is about
4159 * @return GNUNET_OK to keep the connection open,
4160 * GNUNET_SYSERR to close it (signal serious error)
4163 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4164 const struct GNUNET_MessageHeader *message)
4166 struct GNUNET_MESH_PathBroken *msg;
4167 struct MeshTunnel *t;
4169 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4170 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4171 msg = (struct GNUNET_MESH_PathBroken *) message;
4172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4173 GNUNET_i2s (&msg->peer1));
4174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4175 GNUNET_i2s (&msg->peer2));
4176 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4179 GNUNET_break_op (0);
4182 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4183 GNUNET_PEER_search (&msg->peer2));
4190 * Core handler for tunnel destruction
4192 * @param cls closure
4193 * @param message message
4194 * @param peer peer identity this notification is about
4196 * @return GNUNET_OK to keep the connection open,
4197 * GNUNET_SYSERR to close it (signal serious error)
4200 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4201 const struct GNUNET_MessageHeader *message)
4203 struct GNUNET_MESH_TunnelDestroy *msg;
4204 struct MeshTunnel *t;
4206 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4207 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4208 "Got a TUNNEL DESTROY packet from %s\n",
4210 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4211 " for tunnel %s [%u]\n",
4212 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4213 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4216 /* Probably already got the message from another path,
4217 * destroyed the tunnel and retransmitted to children.
4220 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
4224 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4227 t->local_tid, t->local_tid_dest);
4229 if (GNUNET_PEER_search (peer) == t->prev_hop)
4231 // TODO check owner's signature
4232 // TODO add owner's signatue to tunnel for retransmission
4233 peer_cancel_queues (t->prev_hop, t);
4234 GNUNET_PEER_change_rc (t->prev_hop, -1);
4237 else if (GNUNET_PEER_search (peer) == t->next_hop)
4239 // TODO check dest's signature
4240 // TODO add dest's signatue to tunnel for retransmission
4241 peer_cancel_queues (t->next_hop, t);
4242 GNUNET_PEER_change_rc (t->next_hop, -1);
4247 GNUNET_break_op (0);
4248 // TODO check both owner AND destination's signature to see which matches
4249 // TODO restransmit in appropriate direction
4252 tunnel_destroy_empty (t);
4254 // TODO: add timeout to destroy the tunnel anyway
4260 * Generic handler for mesh network payload traffic.
4262 * @param peer Peer identity this notification is about.
4263 * @param message Data message.
4264 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
4266 * @return GNUNET_OK to keep the connection open,
4267 * GNUNET_SYSERR to close it (signal serious error)
4270 handle_mesh_data (const struct GNUNET_PeerIdentity *peer,
4271 const struct GNUNET_MessageHeader *message,
4274 struct GNUNET_MESH_Data *msg;
4275 struct MeshFlowControl *fc;
4276 struct MeshTunnelReliability *rel;
4277 struct MeshTunnel *t;
4278 struct MeshClient *c;
4286 size = ntohs (message->size);
4288 sizeof (struct GNUNET_MESH_Data) +
4289 sizeof (struct GNUNET_MessageHeader))
4294 type =ntohs (message->type);
4295 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
4296 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4297 msg = (struct GNUNET_MESH_Data *) message;
4298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
4299 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
4301 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4304 /* TODO notify back: we don't know this tunnel */
4305 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4306 GNUNET_break_op (0);
4310 /* Initialize FWD/BCK data */
4311 pid = ntohl (msg->pid);
4312 fc = fwd ? &t->prev_fc : &t->next_fc;
4313 c = fwd ? t->client : t->owner;
4314 rel = fwd ? t->bck_rel : t->fwd_rel;
4315 hop = fwd ? t->next_hop : t->prev_hop;
4316 if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
4318 GNUNET_STATISTICS_update (stats, "# unsolicited data", 1, GNUNET_NO);
4319 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4320 "WARNING Received PID %u, (prev %u), ACK %u\n",
4321 pid, fc->last_pid_recv, fc->last_ack_sent);
4325 tunnel_change_state (t, MESH_TUNNEL_READY);
4326 tunnel_reset_timeout (t, fwd);
4329 /* TODO signature verification */
4330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us! sending to client\n");
4331 GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
4332 if (GMC_is_pid_bigger (pid, fc->last_pid_recv))
4336 mid = ntohl (msg->mid);
4337 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4338 " pid %u (mid %u) not seen yet\n", pid, mid);
4339 fc->last_pid_recv = pid;
4341 if (GNUNET_NO == t->reliable ||
4342 ( !GMC_is_pid_bigger (rel->mid_recv, mid) &&
4343 GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) )
4345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4346 "!!! RECV %u\n", ntohl (msg->mid));
4347 if (GNUNET_YES == t->reliable)
4349 /* Is this the exact next expected messasge? */
4350 if (mid == rel->mid_recv)
4352 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
4354 tunnel_send_client_data (t, msg, fwd);
4355 tunnel_send_client_buffered_data (t, c, rel);
4359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
4360 tunnel_add_buffered_data (t, msg, rel);
4363 else /* Tunnel unreliable, send to clients directly */
4365 tunnel_send_client_data (t, msg, fwd);
4370 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4371 " MID %u not expected (%u - %u), dropping!\n",
4372 ntohl (msg->mid), rel->mid_recv, rel->mid_recv + 64);
4377 // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
4378 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4379 " Pid %u not expected (%u+), dropping!\n",
4380 pid, fc->last_pid_recv + 1);
4382 tunnel_send_ack (t, type, fwd);
4385 fc->last_pid_recv = pid;
4388 GNUNET_STATISTICS_update (stats, "# data on dying tunnel", 1, GNUNET_NO);
4389 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "data on dying tunnel %s[%X]\n",
4390 GNUNET_PEER_resolve2 (t->id.oid), ntohl (msg->tid));
4391 return GNUNET_OK; /* Next hop has destoyed the tunnel, drop */
4393 ttl = ntohl (msg->ttl);
4394 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4397 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4398 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4399 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, fwd);
4405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
4406 send_prebuilt_message (message, hop, t);
4407 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4414 * Core handler for mesh network traffic going from the origin to a peer
4416 * @param cls Closure (unused).
4417 * @param message Message received.
4418 * @param peer Peer who sent the message.
4420 * @return GNUNET_OK to keep the connection open,
4421 * GNUNET_SYSERR to close it (signal serious error)
4424 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4425 const struct GNUNET_MessageHeader *message)
4427 return handle_mesh_data (peer, message, GNUNET_YES);
4431 * Core handler for mesh network traffic towards the owner of a tunnel.
4433 * @param cls Closure (unused).
4434 * @param message Message received.
4435 * @param peer Peer who sent the message.
4437 * @return GNUNET_OK to keep the connection open,
4438 * GNUNET_SYSERR to close it (signal serious error)
4441 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4442 const struct GNUNET_MessageHeader *message)
4444 return handle_mesh_data (peer, message, GNUNET_NO);
4449 * Core handler for mesh network traffic end-to-end ACKs.
4451 * @param cls Closure.
4452 * @param message Message.
4453 * @param peer Peer identity this notification is about.
4455 * @return GNUNET_OK to keep the connection open,
4456 * GNUNET_SYSERR to close it (signal serious error)
4459 handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4460 const struct GNUNET_MessageHeader *message)
4462 struct GNUNET_MESH_DataACK *msg;
4463 struct MeshTunnelReliability *rel;
4464 struct MeshReliableMessage *copy;
4465 struct MeshReliableMessage *next;
4466 struct MeshTunnel *t;
4472 type = ntohs (message->type);
4473 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message from %s!\n",
4474 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4475 msg = (struct GNUNET_MESH_DataACK *) message;
4477 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4480 /* TODO notify that we dont know this tunnel (whom)? */
4481 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4484 ack = ntohl (msg->mid);
4485 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4487 /* Is this a forward or backward ACK? */
4488 id = GNUNET_PEER_search (peer);
4489 if (t->next_hop == id && GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type)
4491 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4492 if (NULL == t->owner)
4494 send_prebuilt_message (message, t->prev_hop, t);
4499 else if (t->prev_hop == id && GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK == type)
4501 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4502 if (NULL == t->client)
4504 send_prebuilt_message (message, t->next_hop, t);
4511 GNUNET_break_op (0);
4515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %u\n", ack);
4516 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
4518 if (GMC_is_pid_bigger (copy->mid, ack))
4520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
4521 tunnel_free_sent_reliable (t, msg, rel);
4525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
4527 tunnel_free_reliable_message (copy);
4529 /* Once buffers have been free'd, send ACK */
4530 tunnel_send_ack (t, type, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type);
4532 /* If some message was free'd, update the retransmission delay*/
4533 if (GNUNET_YES == work)
4535 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
4537 GNUNET_SCHEDULER_cancel (rel->retry_task);
4538 if (NULL == rel->head_sent)
4540 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
4544 struct GNUNET_TIME_Absolute new_target;
4545 struct GNUNET_TIME_Relative delay;
4547 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
4548 MESH_RETRANSMIT_MARGIN);
4549 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
4551 delay = GNUNET_TIME_absolute_get_remaining (new_target);
4553 GNUNET_SCHEDULER_add_delayed (delay,
4554 &tunnel_retransmit_message,
4565 * Core handler for mesh network traffic point-to-point acks.
4567 * @param cls closure
4568 * @param message message
4569 * @param peer peer identity this notification is about
4571 * @return GNUNET_OK to keep the connection open,
4572 * GNUNET_SYSERR to close it (signal serious error)
4575 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4576 const struct GNUNET_MessageHeader *message)
4578 struct GNUNET_MESH_ACK *msg;
4579 struct MeshTunnel *t;
4580 struct MeshFlowControl *fc;
4584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4586 msg = (struct GNUNET_MESH_ACK *) message;
4588 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4592 /* TODO notify that we dont know this tunnel (whom)? */
4593 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4596 ack = ntohl (msg->pid);
4597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4599 /* Is this a forward or backward ACK? */
4600 id = GNUNET_PEER_search (peer);
4601 if (t->next_hop == id)
4603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4606 else if (t->prev_hop == id)
4608 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4613 GNUNET_break_op (0);
4617 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
4618 GMC_is_pid_bigger (ack, fc->last_ack_recv))
4620 GNUNET_SCHEDULER_cancel (fc->poll_task);
4621 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4622 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4625 fc->last_ack_recv = ack;
4626 peer_unlock_queue (id);
4627 tunnel_change_state (t, MESH_TUNNEL_READY);
4629 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, t->next_hop == id);
4636 * Core handler for mesh network traffic point-to-point ack polls.
4638 * @param cls closure
4639 * @param message message
4640 * @param peer peer identity this notification is about
4642 * @return GNUNET_OK to keep the connection open,
4643 * GNUNET_SYSERR to close it (signal serious error)
4646 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4647 const struct GNUNET_MessageHeader *message)
4649 struct GNUNET_MESH_Poll *msg;
4650 struct MeshTunnel *t;
4651 struct MeshFlowControl *fc;
4656 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
4659 msg = (struct GNUNET_MESH_Poll *) message;
4661 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4665 /* TODO notify that we dont know this tunnel (whom)? */
4666 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4667 GNUNET_break_op (0);
4671 /* Is this a forward or backward ACK? */
4672 id = GNUNET_PEER_search (peer);
4673 pid = ntohl (msg->pid);
4674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid);
4675 if (t->next_hop == id)
4677 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4679 old = fc->last_pid_recv;
4681 else if (t->prev_hop == id)
4683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4685 old = fc->last_pid_recv;
4693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", fc->last_pid_recv);
4694 fc->last_pid_recv = pid;
4695 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, t->prev_hop == id);
4697 if (GNUNET_YES == t->reliable)
4698 fc->last_pid_recv = old;
4705 * Core handler for mesh keepalives.
4707 * @param cls closure
4708 * @param message message
4709 * @param peer peer identity this notification is about
4710 * @return GNUNET_OK to keep the connection open,
4711 * GNUNET_SYSERR to close it (signal serious error)
4713 * TODO: Check who we got this from, to validate route.
4716 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4717 const struct GNUNET_MessageHeader *message)
4719 struct GNUNET_MESH_TunnelKeepAlive *msg;
4720 struct MeshTunnel *t;
4721 struct MeshClient *c;
4725 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4726 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4729 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4732 /* TODO notify that we dont know that tunnel */
4733 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4738 fwd = GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE == ntohs (message->type) ?
4739 GNUNET_YES : GNUNET_NO;
4740 c = fwd ? t->client : t->owner;
4741 hop = fwd ? t->next_hop : t->prev_hop;
4744 tunnel_change_state (t, MESH_TUNNEL_READY);
4745 tunnel_reset_timeout (t, fwd);
4746 if (NULL != c || 0 == hop || myid == hop)
4749 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4750 send_prebuilt_message (message, hop, t);
4757 * Functions to handle messages from core
4759 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4760 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4761 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4762 sizeof (struct GNUNET_MESH_PathBroken)},
4763 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4764 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4765 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4766 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4767 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK,
4768 sizeof (struct GNUNET_MESH_DataACK)},
4769 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK,
4770 sizeof (struct GNUNET_MESH_DataACK)},
4771 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE,
4772 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4773 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE,
4774 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4775 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4776 sizeof (struct GNUNET_MESH_ACK)},
4777 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4778 sizeof (struct GNUNET_MESH_Poll)},
4779 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4780 sizeof (struct GNUNET_MESH_PathACK)},
4786 * Function to process paths received for a new peer addition. The recorded
4787 * paths form the initial tunnel, which can be optimized later.
4788 * Called on each result obtained for the DHT search.
4790 * @param cls closure
4791 * @param exp when will this value expire
4792 * @param key key of the result
4793 * @param get_path path of the get request
4794 * @param get_path_length lenght of get_path
4795 * @param put_path path of the put request
4796 * @param put_path_length length of the put_path
4797 * @param type type of the result
4798 * @param size number of bytes in data
4799 * @param data pointer to the result data
4802 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4803 const struct GNUNET_HashCode * key,
4804 const struct GNUNET_PeerIdentity *get_path,
4805 unsigned int get_path_length,
4806 const struct GNUNET_PeerIdentity *put_path,
4807 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4808 size_t size, const void *data)
4810 struct MeshPeerInfo *peer = cls;
4811 struct MeshPeerPath *p;
4812 struct GNUNET_PeerIdentity pi;
4815 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4816 GNUNET_PEER_resolve (peer->id, &pi);
4817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4819 p = path_build_from_dht (get_path, get_path_length,
4820 put_path, put_path_length);
4821 path_add_to_peers (p, GNUNET_NO);
4823 for (i = 0; i < peer->ntunnels; i++)
4825 struct GNUNET_PeerIdentity id;
4827 GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id);
4828 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n",
4829 GNUNET_i2s (&id), peer->tunnels[i]->id.tid,
4830 peer->tunnels[i]->local_tid,
4831 peer->tunnels[i]->local_tid_dest);
4832 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
4834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
4835 peer_connect (peer, peer->tunnels[i]);
4843 /******************************************************************************/
4844 /********************* MESH LOCAL HANDLES **************************/
4845 /******************************************************************************/
4849 * Handler for client connection.
4851 * @param cls Closure (unused).
4852 * @param client Client handler.
4855 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
4857 struct MeshClient *c;
4861 c = GNUNET_malloc (sizeof (struct MeshClient));
4863 GNUNET_SERVER_client_keep (client);
4864 GNUNET_SERVER_client_set_user_context (client, c);
4865 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4870 * Handler for client disconnection
4872 * @param cls closure
4873 * @param client identification of the client; NULL
4874 * for the last call when the server is destroyed
4877 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4879 struct MeshClient *c;
4880 struct MeshClient *next;
4882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
4885 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4889 c = client_get (client);
4892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u, %p)\n",
4894 GNUNET_SERVER_client_drop (c->handle);
4895 c->shutting_down = GNUNET_YES;
4896 if (NULL != c->own_tunnels)
4898 GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels,
4899 &tunnel_destroy_iterator, c);
4900 GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels);
4903 if (NULL != c->incoming_tunnels)
4905 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels,
4906 &tunnel_destroy_iterator, c);
4907 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels);
4910 if (NULL != c->ports)
4912 GNUNET_CONTAINER_multihashmap32_iterate (c->ports,
4913 &client_release_ports, c);
4914 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
4917 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c);
4920 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4925 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
4927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4933 * Handler for new clients
4935 * @param cls closure
4936 * @param client identification of the client
4937 * @param message the actual message, which includes messages the client wants
4940 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4941 const struct GNUNET_MessageHeader *message)
4943 struct GNUNET_MESH_ClientConnect *cc_msg;
4944 struct MeshClient *c;
4949 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
4951 /* Check data sanity */
4952 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4953 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4954 if (0 != (size % sizeof (uint32_t)))
4957 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4960 size /= sizeof (uint32_t);
4962 /* Initialize new client structure */
4963 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
4964 c->id = next_client_id++; /* overflow not important: just for debug */
4965 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
4966 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
4971 p = (uint32_t *) &cc_msg[1];
4972 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
4973 for (i = 0; i < size; i++)
4976 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
4978 /* store in client's hashmap */
4979 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
4980 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4981 /* store in global hashmap */
4982 /* FIXME only allow one client to have the port open,
4983 * have a backup hashmap with waiting clients */
4984 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
4985 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4989 c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4990 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4991 GNUNET_SERVER_notification_context_add (nc, client);
4992 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
4994 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
5000 * Handler for requests of new tunnels
5002 * @param cls Closure.
5003 * @param client Identification of the client.
5004 * @param message The actual message.
5007 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
5008 const struct GNUNET_MessageHeader *message)
5010 struct GNUNET_MESH_TunnelMessage *t_msg;
5011 struct MeshPeerInfo *peer_info;
5012 struct MeshTunnel *t;
5013 struct MeshClient *c;
5014 MESH_TunnelNumber tid;
5016 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
5018 /* Sanity check for client registration */
5019 if (NULL == (c = client_get (client)))
5022 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5027 /* Message size sanity check */
5028 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5031 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5035 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s:%u\n",
5037 GNUNET_i2s (&t_msg->peer), ntohl (t_msg->port));
5038 tid = ntohl (t_msg->tunnel_id);
5039 /* Sanity check for duplicate tunnel IDs */
5040 if (NULL != tunnel_get_by_local_id (c, tid))
5043 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5048 while (NULL != tunnel_get_by_pi (myid, next_tid))
5049 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5050 t = tunnel_new (myid, next_tid, c, tid);
5051 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5055 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5058 t->port = ntohl (t_msg->port);
5059 tunnel_set_options (t, ntohl (t_msg->opt));
5060 if (GNUNET_YES == t->reliable)
5062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
5063 t->fwd_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
5065 t->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
5068 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
5069 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
5071 peer_info = peer_get (&t_msg->peer);
5072 peer_info_add_tunnel (peer_info, t);
5073 peer_connect (peer_info, t);
5074 tunnel_reset_timeout (t, GNUNET_YES);
5075 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5081 * Handler for requests of deleting tunnels
5083 * @param cls closure
5084 * @param client identification of the client
5085 * @param message the actual message
5088 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
5089 const struct GNUNET_MessageHeader *message)
5091 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5092 struct MeshClient *c;
5093 struct MeshTunnel *t;
5094 MESH_TunnelNumber tid;
5096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5097 "Got a DESTROY TUNNEL from client!\n");
5099 /* Sanity check for client registration */
5100 if (NULL == (c = client_get (client)))
5103 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5106 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5108 /* Message sanity check */
5109 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5112 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5116 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5118 /* Retrieve tunnel */
5119 tid = ntohl (tunnel_msg->tunnel_id);
5120 t = tunnel_get_by_local_id (c, tid);
5123 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5125 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5129 /* Cleanup after the tunnel */
5130 client_delete_tunnel (c, t);
5131 if (c == t->client && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV <= tid)
5135 else if (c == t->owner && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV > tid)
5137 peer_info_remove_tunnel (peer_get_short (t->dest), t);
5142 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5143 " tunnel %X client %p (%p, %p)\n",
5144 tid, c, t->owner, t->client);
5148 /* The tunnel will be destroyed when the last message is transmitted. */
5149 tunnel_destroy_empty (t);
5151 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5157 * Handler for client traffic
5159 * @param cls closure
5160 * @param client identification of the client
5161 * @param message the actual message
5164 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
5165 const struct GNUNET_MessageHeader *message)
5167 struct GNUNET_MESH_LocalData *data_msg;
5168 struct MeshClient *c;
5169 struct MeshTunnel *t;
5170 struct MeshFlowControl *fc;
5171 MESH_TunnelNumber tid;
5174 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5175 "Got data from a client!\n");
5177 /* Sanity check for client registration */
5178 if (NULL == (c = client_get (client)))
5181 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5184 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5186 data_msg = (struct GNUNET_MESH_LocalData *) message;
5188 /* Sanity check for message size */
5189 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
5190 if (size < sizeof (struct GNUNET_MessageHeader))
5193 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5197 /* Tunnel exists? */
5198 tid = ntohl (data_msg->tid);
5199 t = tunnel_get_by_local_id (c, tid);
5203 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5207 /* Is the client in the tunnel? */
5208 if ( !( (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5210 t->owner->handle == client)
5212 (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5214 t->client->handle == client) ) )
5217 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5221 /* Ok, everything is correct, send the message
5222 * (pretend we got it from a mesh peer)
5225 struct GNUNET_MESH_Data *payload;
5226 char cbuf[sizeof(struct GNUNET_MESH_Data) + size];
5228 fc = tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? &t->prev_fc : &t->next_fc;
5229 if (GNUNET_YES == t->reliable)
5231 struct MeshTunnelReliability *rel;
5232 struct MeshReliableMessage *copy;
5234 rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel;
5235 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage)
5236 + sizeof(struct GNUNET_MESH_Data)
5238 copy->mid = rel->mid_sent++;
5239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->mid);
5240 copy->timestamp = GNUNET_TIME_absolute_get ();
5243 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
5244 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
5245 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
5248 GNUNET_TIME_relative_multiply (rel->expected_delay,
5249 MESH_RETRANSMIT_MARGIN);
5251 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
5252 &tunnel_retransmit_message,
5255 payload = (struct GNUNET_MESH_Data *) ©[1];
5256 payload->mid = htonl (copy->mid);
5260 payload = (struct GNUNET_MESH_Data *) cbuf;
5261 payload->mid = htonl (fc->last_pid_recv + 1);
5263 memcpy (&payload[1], &data_msg[1], size);
5264 payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size);
5265 payload->header.type = htons (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ?
5266 GNUNET_MESSAGE_TYPE_MESH_UNICAST :
5267 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5268 GNUNET_PEER_resolve(t->id.oid, &payload->oid);;
5269 payload->tid = htonl (t->id.tid);
5270 payload->ttl = htonl (default_ttl);
5271 payload->pid = htonl (fc->last_pid_recv + 1);
5272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5273 " calling generic handler...\n");
5274 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5275 handle_mesh_unicast (NULL, &my_full_id, &payload->header);
5277 handle_mesh_to_orig (NULL, &my_full_id, &payload->header);
5279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
5280 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5287 * Handler for client's ACKs for payload traffic.
5289 * @param cls Closure (unused).
5290 * @param client Identification of the client.
5291 * @param message The actual message.
5294 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5295 const struct GNUNET_MessageHeader *message)
5297 struct GNUNET_MESH_LocalAck *msg;
5298 struct MeshTunnel *t;
5299 struct MeshClient *c;
5300 MESH_TunnelNumber tid;
5302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5303 /* Sanity check for client registration */
5304 if (NULL == (c = client_get (client)))
5307 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5310 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5312 msg = (struct GNUNET_MESH_LocalAck *) message;
5314 /* Tunnel exists? */
5315 tid = ntohl (msg->tunnel_id);
5316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5317 t = tunnel_get_by_local_id (c, tid);
5321 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5322 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5323 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5327 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5328 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5330 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5331 t->prev_fc.last_ack_recv++;
5332 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_NO);
5336 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5337 t->next_fc.last_ack_recv++;
5338 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_YES);
5341 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5349 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5351 * @param cls Closure (client handle).
5352 * @param key Key (hashed tunnel ID, unused).
5353 * @param value Tunnel info.
5355 * @return GNUNET_YES, to keep iterating.
5358 monitor_all_tunnels_iterator (void *cls,
5359 const struct GNUNET_HashCode * key,
5362 struct GNUNET_SERVER_Client *client = cls;
5363 struct MeshTunnel *t = value;
5364 struct GNUNET_MESH_LocalMonitor *msg;
5366 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5367 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5368 msg->tunnel_id = htonl (t->id.tid);
5369 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5370 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5371 GNUNET_PEER_resolve (t->dest, &msg->destination);
5373 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5374 "* sending info about tunnel %s [%u]\n",
5375 GNUNET_i2s (&msg->owner), t->id.tid);
5377 GNUNET_SERVER_notification_context_unicast (nc, client,
5378 &msg->header, GNUNET_NO);
5384 * Handler for client's MONITOR request.
5386 * @param cls Closure (unused).
5387 * @param client Identification of the client.
5388 * @param message The actual message.
5391 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5392 const struct GNUNET_MessageHeader *message)
5394 struct MeshClient *c;
5396 /* Sanity check for client registration */
5397 if (NULL == (c = client_get (client)))
5400 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5404 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5405 "Received get tunnels request from client %u\n",
5407 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5408 monitor_all_tunnels_iterator,
5410 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5411 "Get tunnels request from client %u completed\n",
5413 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5418 * Handler for client's MONITOR_TUNNEL request.
5420 * @param cls Closure (unused).
5421 * @param client Identification of the client.
5422 * @param message The actual message.
5425 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5426 const struct GNUNET_MessageHeader *message)
5428 const struct GNUNET_MESH_LocalMonitor *msg;
5429 struct GNUNET_MESH_LocalMonitor *resp;
5430 struct MeshClient *c;
5431 struct MeshTunnel *t;
5433 /* Sanity check for client registration */
5434 if (NULL == (c = client_get (client)))
5437 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5441 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5442 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5443 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5446 ntohl (msg->tunnel_id));
5447 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5450 /* We don't know the tunnel FIXME */
5451 struct GNUNET_MESH_LocalMonitor warn;
5454 GNUNET_SERVER_notification_context_unicast (nc, client,
5457 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5461 /* Initialize context */
5462 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5464 GNUNET_PEER_resolve (t->dest, &resp->destination);
5465 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5466 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5467 &resp->header, GNUNET_NO);
5470 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5471 "Monitor tunnel request from client %u completed\n",
5473 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5478 * Functions to handle messages from clients
5480 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5481 {&handle_local_new_client, NULL,
5482 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5483 {&handle_local_tunnel_create, NULL,
5484 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5485 sizeof (struct GNUNET_MESH_TunnelMessage)},
5486 {&handle_local_tunnel_destroy, NULL,
5487 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5488 sizeof (struct GNUNET_MESH_TunnelMessage)},
5489 {&handle_local_data, NULL,
5490 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
5491 {&handle_local_ack, NULL,
5492 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5493 sizeof (struct GNUNET_MESH_LocalAck)},
5494 {&handle_local_get_tunnels, NULL,
5495 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5496 sizeof (struct GNUNET_MessageHeader)},
5497 {&handle_local_show_tunnel, NULL,
5498 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5499 sizeof (struct GNUNET_MESH_LocalMonitor)},
5505 * Method called whenever a given peer connects.
5507 * @param cls closure
5508 * @param peer peer identity this notification is about
5511 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5513 struct MeshPeerInfo *peer_info;
5514 struct MeshPeerPath *path;
5516 DEBUG_CONN ("Peer connected\n");
5517 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5518 peer_info = peer_get (peer);
5519 if (myid == peer_info->id)
5521 DEBUG_CONN (" (self)\n");
5522 path = path_new (1);
5526 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5527 path = path_new (2);
5528 path->peers[1] = peer_info->id;
5529 GNUNET_PEER_change_rc (peer_info->id, 1);
5530 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5532 path->peers[0] = myid;
5533 GNUNET_PEER_change_rc (myid, 1);
5534 peer_info_add_path (peer_info, path, GNUNET_YES);
5540 * Method called whenever a peer disconnects.
5542 * @param cls closure
5543 * @param peer peer identity this notification is about
5546 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5548 struct MeshPeerInfo *pi;
5549 struct MeshPeerQueue *q;
5550 struct MeshPeerQueue *n;
5552 DEBUG_CONN ("Peer disconnected\n");
5553 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5563 /* TODO try to reroute this traffic instead */
5564 queue_destroy(q, GNUNET_YES);
5567 if (NULL != pi->core_transmit)
5569 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5570 pi->core_transmit = NULL;
5572 peer_info_remove_path (pi, pi->id, myid);
5575 DEBUG_CONN (" (self)\n");
5577 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5583 * Install server (service) handlers and start listening to clients.
5588 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5589 GNUNET_SERVER_connect_notify (server_handle,
5590 &handle_local_client_connect, NULL);
5591 GNUNET_SERVER_disconnect_notify (server_handle,
5592 &handle_local_client_disconnect, NULL);
5593 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5595 clients_head = NULL;
5596 clients_tail = NULL;
5598 GNUNET_SERVER_resume (server_handle);
5603 * To be called on core init/fail.
5605 * @param cls Closure (config)
5606 * @param server handle to the server for this service
5607 * @param identity the public identity of this peer
5610 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5611 const struct GNUNET_PeerIdentity *identity)
5613 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5617 GNUNET_break (core_handle == server);
5618 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5621 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5622 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5624 GNUNET_i2s (identity));
5625 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5627 GNUNET_i2s (&my_full_id));
5628 GNUNET_CORE_disconnect (core_handle);
5629 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5630 NULL, /* Closure passed to MESH functions */
5631 &core_init, /* Call core_init once connected */
5632 &core_connect, /* Handle connects */
5633 &core_disconnect, /* remove peers on disconnects */
5634 NULL, /* Don't notify about all incoming messages */
5635 GNUNET_NO, /* For header only in notification */
5636 NULL, /* Don't notify about all outbound messages */
5637 GNUNET_NO, /* For header-only out notification */
5638 core_handlers); /* Register these handlers */
5647 /******************************************************************************/
5648 /************************ MAIN FUNCTIONS ****************************/
5649 /******************************************************************************/
5652 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5654 * @param cls closure
5655 * @param key current key code
5656 * @param value value in the hash map
5657 * @return GNUNET_YES if we should continue to iterate,
5661 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5663 struct MeshTunnel *t = value;
5670 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5672 * @param cls closure
5673 * @param key current key code
5674 * @param value value in the hash map
5675 * @return GNUNET_YES if we should continue to iterate,
5679 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5681 struct MeshPeerInfo *p = value;
5682 struct MeshPeerQueue *q;
5683 struct MeshPeerQueue *n;
5691 queue_destroy(q, GNUNET_YES);
5695 peer_info_destroy (p);
5701 * Task run during shutdown.
5707 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5709 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5711 if (core_handle != NULL)
5713 GNUNET_CORE_disconnect (core_handle);
5716 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5717 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5718 if (dht_handle != NULL)
5720 GNUNET_DHT_disconnect (dht_handle);
5725 GNUNET_SERVER_notification_context_destroy (nc);
5728 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5730 GNUNET_SCHEDULER_cancel (announce_id_task);
5731 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5738 * Process mesh requests.
5740 * @param cls closure
5741 * @param server the initialized server
5742 * @param c configuration to use
5745 run (void *cls, struct GNUNET_SERVER_Handle *server,
5746 const struct GNUNET_CONFIGURATION_Handle *c)
5749 struct GNUNET_CRYPTO_EccPrivateKey *pk;
5751 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5752 server_handle = server;
5753 GNUNET_SERVER_suspend (server_handle);
5756 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5759 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5761 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5762 "mesh", "peer/privatekey");
5763 GNUNET_SCHEDULER_shutdown ();
5768 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5769 &refresh_path_time))
5771 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5773 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5774 "mesh", "refresh path time");
5775 GNUNET_SCHEDULER_shutdown ();
5780 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5783 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5785 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5786 "mesh", "id announce time");
5787 GNUNET_SCHEDULER_shutdown ();
5792 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5795 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5797 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5798 "mesh", "connect timeout");
5799 GNUNET_SCHEDULER_shutdown ();
5804 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5807 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5809 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5810 "mesh", "max msgs queue");
5811 GNUNET_SCHEDULER_shutdown ();
5816 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5819 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5821 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5822 "mesh", "max tunnels");
5823 GNUNET_SCHEDULER_shutdown ();
5828 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5831 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5833 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5834 "mesh", "default ttl", 64);
5839 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5842 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5843 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5844 "mesh", "max peers", 1000);
5849 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
5856 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5857 "Mesh is running with drop mode enabled. "
5858 "This is NOT a good idea! "
5859 "Remove the DROP_PERCENT option from your configuration.\n");
5863 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5864 &dht_replication_level))
5866 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5868 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5869 "mesh", "dht replication level", 3);
5870 dht_replication_level = 3;
5873 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5874 incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5875 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5876 ports = GNUNET_CONTAINER_multihashmap32_create (32);
5878 dht_handle = GNUNET_DHT_connect (c, 64);
5879 if (NULL == dht_handle)
5883 stats = GNUNET_STATISTICS_create ("mesh", c);
5885 /* Scheduled the task to clean up when shutdown is called */
5886 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5888 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
5889 GNUNET_free (keyfile);
5890 GNUNET_assert (NULL != pk);
5891 my_private_key = pk;
5892 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5893 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5894 &my_full_id.hashPubKey);
5895 myid = GNUNET_PEER_intern (&my_full_id);
5896 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5897 "Mesh for peer [%s] starting\n",
5898 GNUNET_i2s(&my_full_id));
5900 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5901 NULL, /* Closure passed to MESH functions */
5902 &core_init, /* Call core_init once connected */
5903 &core_connect, /* Handle connects */
5904 &core_disconnect, /* remove peers on disconnects */
5905 NULL, /* Don't notify about all incoming messages */
5906 GNUNET_NO, /* For header only in notification */
5907 NULL, /* Don't notify about all outbound messages */
5908 GNUNET_NO, /* For header-only out notification */
5909 core_handlers); /* Register these handlers */
5910 if (NULL == core_handle)
5913 GNUNET_SCHEDULER_shutdown ();
5917 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5918 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5924 * The main function for the mesh service.
5926 * @param argc number of arguments from the command line
5927 * @param argv command line arguments
5928 * @return 0 ok, 1 on error
5931 main (int argc, char *const *argv)
5936 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5937 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5939 ret = (GNUNET_OK == r) ? 0 : 1;
5940 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");