2 This file is part of GNUnet.
3 (C) 2001-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
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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,
18 Boston, MA 02111-1307, USA.
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)
1104 res = GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels,
1106 if (GNUNET_YES != res)
1107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel owner KO\n");
1111 res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
1112 t->local_tid_dest, t);
1113 if (GNUNET_YES != res)
1114 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel client KO\n");
1120 * Notify the appropriate client that a new incoming tunnel was created.
1122 * @param t Tunnel that was created.
1125 send_local_tunnel_create (struct MeshTunnel *t)
1127 struct GNUNET_MESH_TunnelMessage msg;
1129 if (NULL == t->client)
1131 msg.header.size = htons (sizeof (msg));
1132 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1133 msg.tunnel_id = htonl (t->local_tid_dest);
1134 msg.port = htonl (t->port);
1136 msg.opt |= GNUNET_YES == t->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0;
1137 msg.opt |= GNUNET_YES == t->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0;
1138 msg.opt = htonl (msg.opt);
1139 GNUNET_PEER_resolve (t->id.oid, &msg.peer);
1140 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1141 &msg.header, GNUNET_NO);
1146 * Notify a client that the incoming tunnel is no longer valid.
1148 * @param t Tunnel that is destroyed.
1149 * @param fwd Forward notification (owner->dest)?
1152 send_local_tunnel_destroy (struct MeshTunnel *t, int fwd)
1154 struct GNUNET_MESH_TunnelMessage msg;
1155 struct MeshClient *c;
1157 c = fwd ? t->client : t->owner;
1163 msg.header.size = htons (sizeof (msg));
1164 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1165 msg.tunnel_id = htonl (fwd ? t->local_tid_dest : t->local_tid);
1166 msg.port = htonl (0);
1167 memset (&msg.peer, 0, sizeof (msg.peer));
1168 msg.opt = htonl (0);
1169 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1170 &msg.header, GNUNET_NO);
1175 * Build a local ACK message and send it to a local client.
1177 * @param t Tunnel on which to send the ACK.
1178 * @param c Client to whom send the ACK.
1179 * @param is_fwd Set to GNUNET_YES for FWD ACK (dest->owner)
1182 send_local_ack (struct MeshTunnel *t,
1183 struct MeshClient *c,
1186 struct GNUNET_MESH_LocalAck msg;
1188 msg.header.size = htons (sizeof (msg));
1189 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1190 msg.tunnel_id = htonl (is_fwd ? t->local_tid : t->local_tid_dest);
1191 GNUNET_SERVER_notification_context_unicast (nc,
1200 * Sends an already built message to a peer, properly registrating
1201 * all used resources.
1203 * @param message Message to send. Function makes a copy of it.
1204 * @param peer Short ID of the neighbor whom to send the message.
1205 * @param t Tunnel on which this message is transmitted.
1208 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1209 GNUNET_PEER_Id peer,
1210 struct MeshTunnel *t)
1212 struct GNUNET_PeerIdentity id;
1213 struct MeshPeerInfo *neighbor;
1214 struct MeshPeerPath *p;
1219 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1224 size = ntohs (message->size);
1225 data = GNUNET_malloc (size);
1226 memcpy (data, message, size);
1227 type = ntohs(message->type);
1228 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
1229 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
1231 struct GNUNET_MESH_Data *u;
1233 u = (struct GNUNET_MESH_Data *) data;
1234 u->ttl = htonl (ntohl (u->ttl) - 1);
1236 GNUNET_PEER_resolve (peer, &id);
1237 neighbor = peer_get (&id);
1238 for (p = neighbor->path_head; NULL != p; p = p->next)
1248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1249 " %s IS NOT DIRECTLY CONNECTED\n",
1251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1254 for (p = neighbor->path_head; NULL != p; p = p->next)
1256 struct GNUNET_PeerIdentity debug_id;
1259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1260 " path with %u hops through:\n",
1262 for (i = 0; i < p->length; i++)
1264 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1267 i, GNUNET_i2s(&debug_id));
1272 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1273 " no direct connection to %s\n",
1278 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1289 * Sends a CREATE PATH message for a path to a peer, properly registrating
1290 * all used resources.
1292 * @param t Tunnel for which the path is created.
1295 send_path_create (struct MeshTunnel *t)
1297 struct MeshPeerInfo *neighbor;
1299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send create path\n");
1300 neighbor = peer_get_short (t->next_hop);
1302 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1303 sizeof (struct GNUNET_MESH_CreateTunnel) +
1304 (t->path->length * sizeof (struct GNUNET_PeerIdentity)),
1307 tunnel_change_state (t, MESH_TUNNEL_WAITING);
1312 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1314 * @param t Tunnel which to confirm.
1317 send_path_ack (struct MeshTunnel *t)
1319 struct MeshPeerInfo *neighbor;
1321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send path ack\n");
1322 neighbor = peer_get_short (t->prev_hop);
1324 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1325 sizeof (struct GNUNET_MESH_PathACK),
1328 tunnel_change_state (t, MESH_TUNNEL_WAITING);
1333 * Build an ACK message and queue it to send to the given peer.
1335 * @param t Tunnel on which to send the ACK.
1336 * @param peer Peer to whom send the ACK.
1337 * @param ack Value of the ACK.
1340 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
1342 struct GNUNET_MESH_ACK msg;
1344 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1345 msg.header.size = htons (sizeof (msg));
1346 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
1347 msg.pid = htonl (ack);
1348 msg.tid = htonl (t->id.tid);
1350 send_prebuilt_message (&msg.header, peer, t);
1355 * Core callback to write a pre-constructed data packet to core buffer
1357 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1358 * @param size Number of bytes available in buf.
1359 * @param buf Where the to write the message.
1361 * @return number of bytes written to buf
1364 send_core_data_raw (void *cls, size_t size, void *buf)
1366 struct GNUNET_MessageHeader *msg = cls;
1369 GNUNET_assert (NULL != msg);
1370 total_size = ntohs (msg->size);
1372 if (total_size > size)
1377 memcpy (buf, msg, total_size);
1384 * Function to send a create path packet to a peer.
1386 * @param cls closure
1387 * @param size number of bytes available in buf
1388 * @param buf where the callee should write the message
1389 * @return number of bytes written to buf
1392 send_core_path_create (void *cls, size_t size, void *buf)
1394 struct MeshTunnel *t = cls;
1395 struct GNUNET_MESH_CreateTunnel *msg;
1396 struct GNUNET_PeerIdentity *peer_ptr;
1397 struct MeshPeerPath *p = t->path;
1402 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
1404 sizeof (struct GNUNET_MESH_CreateTunnel) +
1405 p->length * sizeof (struct GNUNET_PeerIdentity);
1407 if (size < size_needed || NULL == buf)
1412 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
1413 msg->header.size = htons (size_needed);
1414 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1415 msg->tid = ntohl (t->id.tid);
1418 if (GNUNET_YES == t->nobuffer)
1419 opt |= GNUNET_MESH_OPTION_NOBUFFER;
1420 if (GNUNET_YES == t->reliable)
1421 opt |= GNUNET_MESH_OPTION_RELIABLE;
1422 msg->opt = htonl (opt);
1423 msg->port = htonl (t->port);
1425 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1426 for (i = 0; i < p->length; i++)
1428 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1432 "CREATE PATH (%u bytes long) sent!\n", size_needed);
1438 * Creates a path ack message in buf and frees all unused resources.
1440 * @param cls closure (MeshTransmissionDescriptor)
1441 * @param size number of bytes available in buf
1442 * @param buf where the callee should write the message
1443 * @return number of bytes written to buf
1446 send_core_path_ack (void *cls, size_t size, void *buf)
1448 struct MeshTunnel *t = cls;
1449 struct GNUNET_MESH_PathACK *msg = buf;
1451 GNUNET_assert (NULL != t);
1452 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1457 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
1458 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1459 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1460 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
1461 msg->tid = htonl (t->id.tid);
1462 msg->peer_id = my_full_id;
1463 msg->ack = htonl (t->prev_fc.last_ack_sent);
1465 /* TODO add signature */
1467 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
1468 return sizeof (struct GNUNET_MESH_PathACK);
1473 * Iterator over all the peers to remove the oldest not-used entry.
1475 * @param cls Closure (unsued).
1476 * @param key ID of the peer.
1477 * @param value Peer_Info of the peer.
1482 peer_info_timeout (void *cls,
1483 const struct GNUNET_HashCode *key,
1490 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1491 * and insert it in the appropriate structures if the peer is not known yet.
1493 * @param peer Full identity of the peer.
1495 * @return Existing or newly created peer info.
1497 static struct MeshPeerInfo *
1498 peer_get (const struct GNUNET_PeerIdentity *peer)
1500 struct MeshPeerInfo *peer_info;
1502 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1503 if (NULL == peer_info)
1506 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1507 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1509 GNUNET_CONTAINER_multihashmap_iterate (peers,
1513 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1514 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1515 peer_info->id = GNUNET_PEER_intern (peer);
1517 peer_info->last_contact = GNUNET_TIME_absolute_get();
1524 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1525 * and insert it in the appropriate structures if the peer is not known yet.
1527 * @param peer Short identity of the peer.
1529 * @return Existing or newly created peer info.
1531 static struct MeshPeerInfo *
1532 peer_get_short (const GNUNET_PEER_Id peer)
1534 struct GNUNET_PeerIdentity id;
1536 GNUNET_PEER_resolve (peer, &id);
1537 return peer_get (&id);
1542 * Select which PID to POLL for, to compensate for lost messages.
1544 * @param pi Peer we want to poll.
1545 * @param t Tunnel about which we want to poll.
1547 * @return PID to use, either last sent or first_in_queue - 1
1550 peer_get_first_payload_pid (struct MeshPeerInfo *pi, struct MeshTunnel *t)
1552 struct MeshPeerQueue *q;
1555 type = pi->id == t->next_hop ? GNUNET_MESSAGE_TYPE_MESH_UNICAST :
1556 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN;
1558 for (q = pi->queue_head; NULL != q; q = q->next)
1560 if (q->type == type && q->tunnel == t)
1562 struct GNUNET_MESH_Data *msg = q->cls;
1564 /* Pretend that the last one sent was the previous to this */
1565 return ntohl (msg->pid) - 1;
1569 /* No data in queue, use last sent */
1571 struct MeshFlowControl *fc;
1573 fc = pi->id == t->next_hop ? &t->next_fc : &t->prev_fc;
1574 return fc->last_pid_sent;
1580 * Choose the best path towards a peer considering the tunnel properties.
1582 * @param peer The destination peer.
1583 * @param t The tunnel the path is for.
1585 * @return Best current known path towards the peer, if any.
1587 static struct MeshPeerPath *
1588 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1590 struct MeshPeerPath *best_p;
1591 struct MeshPeerPath *p;
1592 unsigned int best_cost;
1595 best_p = p = peer->path_head;
1596 best_cost = cost = p->length;
1599 if ((cost = p->length) < best_cost)
1611 * Try to establish a new connection to this peer in the given tunnel.
1612 * If the peer doesn't have any path to it yet, try to get one.
1613 * If the peer already has some path, send a CREATE PATH towards it.
1615 * @param peer PeerInfo of the peer.
1616 * @param t Tunnel for which to create the path, if possible.
1619 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1621 struct MeshPeerPath *p;
1623 if (NULL != peer->path_head)
1625 p = peer_get_best_path (peer, t);
1626 tunnel_use_path (t, p);
1627 send_path_create (t);
1629 else if (NULL == peer->dhtget)
1631 struct GNUNET_PeerIdentity id;
1633 GNUNET_PEER_resolve (peer->id, &id);
1634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1635 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1636 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1637 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1638 &id.hashPubKey, /* key to search */
1639 dht_replication_level, /* replication level */
1640 GNUNET_DHT_RO_RECORD_ROUTE |
1641 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1643 0, /* xquery bits */
1644 &dht_get_id_handler, peer);
1645 tunnel_change_state (t, MESH_TUNNEL_SEARCHING);
1649 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1650 "There is no path but the DHT GET is already started.\n");
1656 * @brief Re-initiate traffic to this peer if necessary.
1658 * Check if there is traffic queued towards this peer
1659 * and the core transmit handle is NULL (traffic was stalled).
1660 * If so, call core tmt rdy.
1662 * @param peer_id Short ID of peer to which initiate traffic.
1665 peer_unlock_queue (GNUNET_PEER_Id peer_id)
1667 struct MeshPeerInfo *peer;
1668 struct MeshPeerQueue *q;
1671 peer = peer_get_short (peer_id);
1672 if (NULL != peer->core_transmit)
1675 q = queue_get_next (peer);
1680 peer->core_transmit =
1681 GNUNET_CORE_notify_transmit_ready (core_handle,
1684 GNUNET_TIME_UNIT_FOREVER_REL,
1685 GNUNET_PEER_resolve2 (peer->id),
1693 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
1695 * @param t Tunnel which to cancel.
1696 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
1699 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
1701 struct MeshPeerInfo *peer_info;
1702 struct MeshPeerQueue *pq;
1703 struct MeshPeerQueue *next;
1704 struct MeshFlowControl *fc;
1707 return; /* Was local peer, 0'ed in tunnel_destroy_iterator */
1708 peer_info = peer_get_short (neighbor);
1709 for (pq = peer_info->queue_head; NULL != pq; pq = next)
1712 if (pq->tunnel == t)
1714 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
1715 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
1717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1718 "peer_cancel_queues %s\n",
1719 GNUNET_MESH_DEBUG_M2S (pq->type));
1721 queue_destroy (pq, GNUNET_YES);
1724 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
1726 GNUNET_CORE_notify_transmit_ready_cancel (peer_info->core_transmit);
1727 peer_info->core_transmit = NULL;
1729 fc = neighbor == t->next_hop ? &t->next_fc : &t->prev_fc;
1730 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
1732 GNUNET_SCHEDULER_cancel (fc->poll_task);
1733 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1739 * Destroy the peer_info and free any allocated resources linked to it
1741 * @param pi The peer_info to destroy.
1743 * @return GNUNET_OK on success
1746 peer_info_destroy (struct MeshPeerInfo *pi)
1748 struct GNUNET_PeerIdentity id;
1749 struct MeshPeerPath *p;
1750 struct MeshPeerPath *nextp;
1753 GNUNET_PEER_resolve (pi->id, &id);
1754 GNUNET_PEER_change_rc (pi->id, -1);
1757 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1760 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1761 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1763 if (NULL != pi->dhtget)
1765 GNUNET_DHT_get_stop (pi->dhtget);
1771 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1775 for (i = 0; i < pi->ntunnels; i++)
1776 tunnel_destroy_empty (pi->tunnels[i]);
1777 GNUNET_array_grow (pi->tunnels, pi->ntunnels, 0);
1784 * Remove all paths that rely on a direct connection between p1 and p2
1785 * from the peer itself and notify all tunnels about it.
1787 * @param peer PeerInfo of affected peer.
1788 * @param p1 GNUNET_PEER_Id of one peer.
1789 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1792 * TODO: optimize (see below)
1795 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1798 struct MeshPeerPath *p;
1799 struct MeshPeerPath *next;
1800 struct MeshPeerInfo *peer_d;
1802 unsigned int destroyed;
1805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1807 for (p = peer->path_head; NULL != p; p = next)
1810 for (i = 0; i < (p->length - 1); i++)
1812 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1813 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1815 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1825 for (i = 0; i < peer->ntunnels; i++)
1827 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1831 peer_d = peer_get_short (d);
1832 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1833 tunnel_use_path (peer->tunnels[i], next);
1834 peer_connect (peer_d, peer->tunnels[i]);
1836 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1841 * Add the path to the peer and update the path used to reach it in case this
1844 * @param peer_info Destination peer to add the path to.
1845 * @param path New path to add. Last peer must be the peer in arg 1.
1846 * Path will be either used of freed if already known.
1847 * @param trusted Do we trust that this path is real?
1850 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1853 struct MeshPeerPath *aux;
1857 if ((NULL == peer_info) || (NULL == path))
1860 path_destroy (path);
1863 if (path->peers[path->length - 1] != peer_info->id)
1866 path_destroy (path);
1869 if (2 >= path->length && GNUNET_NO == trusted)
1871 /* Only allow CORE to tell us about direct paths */
1872 path_destroy (path);
1875 for (l = 1; l < path->length; l++)
1877 if (path->peers[l] == myid)
1879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1880 for (l2 = 0; l2 < path->length - l; l2++)
1882 path->peers[l2] = path->peers[l + l2];
1887 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1892 struct GNUNET_PeerIdentity id;
1894 GNUNET_PEER_resolve (peer_info->id, &id);
1895 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1896 path->length, GNUNET_i2s (&id));
1899 l = path_get_length (path);
1902 path_destroy (path);
1906 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1907 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1909 l2 = path_get_length (aux);
1912 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1913 peer_info->path_tail, aux, path);
1918 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1920 path_destroy (path);
1925 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1932 * Add the path to the origin peer and update the path used to reach it in case
1933 * this is the shortest.
1934 * The path is given in peer_info -> destination, therefore we turn the path
1935 * upside down first.
1937 * @param peer_info Peer to add the path to, being the origin of the path.
1938 * @param path New path to add after being inversed.
1939 * Path will be either used or freed.
1940 * @param trusted Do we trust that this path is real?
1943 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1944 struct MeshPeerPath *path, int trusted)
1947 peer_info_add_path (peer_info, path, trusted);
1952 * Add a tunnel to the list of tunnels a peer participates in.
1953 * Update the tunnel's destination.
1955 * @param p Peer to add to.
1956 * @param t Tunnel to add.
1959 peer_info_add_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1963 GNUNET_break (t->dest == p->id);
1967 GNUNET_PEER_change_rc (t->dest, 1);
1968 GNUNET_array_append (p->tunnels, p->ntunnels, t);
1973 * Remove a tunnel from the list of tunnels a peer participates in.
1974 * Free the tunnel's destination.
1976 * @param p Peer to clean.
1977 * @param t Tunnel to remove.
1980 peer_info_remove_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1984 if (t->dest == p->id)
1986 GNUNET_PEER_change_rc (t->dest, -1);
1989 for (i = 0; i < p->ntunnels; i++)
1991 if (p->tunnels[i] == t)
1993 p->tunnels[i] = p->tunnels[p->ntunnels - 1];
1994 GNUNET_array_grow (p->tunnels, p->ntunnels, p->ntunnels - 1);
2002 * Function called if the connection to the peer has been stalled for a while,
2003 * possibly due to a missed ACK. Poll the peer about its ACK status.
2005 * @param cls Closure (poll ctx).
2006 * @param tc TaskContext.
2009 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2011 struct MeshFlowControl *fc = cls;
2012 struct GNUNET_MESH_Poll msg;
2013 struct MeshTunnel *t = fc->t;
2014 GNUNET_PEER_Id peer;
2016 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2017 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n");
2024 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2026 if (fc == &t->prev_fc)
2028 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** prev peer!\n");
2031 else if (fc == &t->next_fc)
2033 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** next peer!\n");
2041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** peer: %s!\n",
2042 GNUNET_i2s(GNUNET_PEER_resolve2 (peer)));
2045 if (GNUNET_YES == t->destroy)
2052 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
2053 msg.header.size = htons (sizeof (msg));
2054 msg.tid = htonl (t->id.tid);
2055 msg.pid = htonl (peer_get_first_payload_pid (peer_get_short (peer), t));
2056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** pid (%u)!\n", ntohl (msg.pid));
2057 send_prebuilt_message (&msg.header, peer, t);
2058 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
2059 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2065 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2066 * to obtain a local peer -> destination path and interning the peer ids.
2068 * @return Newly allocated and created path
2070 static struct MeshPeerPath *
2071 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2072 unsigned int get_path_length,
2073 const struct GNUNET_PeerIdentity *put_path,
2074 unsigned int put_path_length)
2076 struct MeshPeerPath *p;
2082 GNUNET_PEER_change_rc (myid, 1);
2083 i = get_path_length;
2084 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2085 for (i--; i >= 0; i--)
2087 id = GNUNET_PEER_intern (&get_path[i]);
2088 if (p->length > 0 && id == p->peers[p->length - 1])
2090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2091 GNUNET_PEER_change_rc (id, -1);
2095 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2096 GNUNET_i2s (&get_path[i]));
2098 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2099 p->peers[p->length - 1] = id;
2102 i = put_path_length;
2103 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2104 for (i--; i >= 0; i--)
2106 id = GNUNET_PEER_intern (&put_path[i]);
2109 /* PUT path went through us, so discard the path up until now and start
2110 * from here to get a much shorter (and loop-free) path.
2115 if (p->length > 0 && id == p->peers[p->length - 1])
2117 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2118 GNUNET_PEER_change_rc (id, -1);
2122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2123 GNUNET_i2s (&put_path[i]));
2125 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2126 p->peers[p->length - 1] = id;
2130 if (get_path_length > 0)
2131 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2132 GNUNET_i2s (&get_path[0]));
2133 if (put_path_length > 0)
2134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2135 GNUNET_i2s (&put_path[0]));
2136 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2138 for (i = 0; i < p->length; i++)
2140 struct GNUNET_PeerIdentity peer_id;
2142 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2144 GNUNET_i2s (&peer_id));
2152 * Adds a path to the peer_infos of all the peers in the path
2154 * @param p Path to process.
2155 * @param confirmed Whether we know if the path works or not.
2158 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2162 /* TODO: invert and add */
2163 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2164 for (i++; i < p->length; i++)
2166 struct MeshPeerInfo *aux;
2167 struct MeshPeerPath *copy;
2169 aux = peer_get_short (p->peers[i]);
2170 copy = path_duplicate (p);
2171 copy->length = i + 1;
2172 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
2178 * Search for a tunnel among the incoming tunnels
2180 * @param tid the local id of the tunnel
2182 * @return tunnel handler, NULL if doesn't exist
2184 static struct MeshTunnel *
2185 tunnel_get_incoming (MESH_TunnelNumber tid)
2187 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2188 return GNUNET_CONTAINER_multihashmap32_get (incoming_tunnels, tid);
2193 * Search for a tunnel among the tunnels for a client
2195 * @param c the client whose tunnels to search in
2196 * @param tid the local id of the tunnel
2198 * @return tunnel handler, NULL if doesn't exist
2200 static struct MeshTunnel *
2201 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2203 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
2205 GNUNET_break_op (0);
2206 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TID %X not a local tid\n", tid);
2209 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2211 return tunnel_get_incoming (tid);
2215 return GNUNET_CONTAINER_multihashmap32_get (c->own_tunnels, tid);
2221 * Search for a tunnel by global ID using PEER_ID
2223 * @param pi owner of the tunnel
2224 * @param tid global tunnel number
2226 * @return tunnel handler, NULL if doesn't exist
2228 static struct MeshTunnel *
2229 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2231 struct MESH_TunnelID id;
2232 struct GNUNET_HashCode hash;
2237 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2238 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2243 * Search for a tunnel by global ID using full PeerIdentities
2245 * @param oid owner of the tunnel
2246 * @param tid global tunnel number
2248 * @return tunnel handler, NULL if doesn't exist
2250 static struct MeshTunnel *
2251 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2253 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2258 * Change the tunnel state.
2260 * @param t Tunnel whose ttate to change.
2261 * @param state New state.
2264 tunnel_change_state (struct MeshTunnel *t, enum MeshTunnelState state)
2266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2267 "Tunnel %s[%X] state was %s\n",
2268 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid,
2269 GNUNET_MESH_DEBUG_S2S (t->state));
2270 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2271 "Tunnel %s[%X] state is now %s\n",
2272 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid,
2273 GNUNET_MESH_DEBUG_S2S (state));
2280 * Add a client to a tunnel, initializing all needed data structures.
2282 * @param t Tunnel to which add the client.
2283 * @param c Client which to add to the tunnel.
2286 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
2288 if (NULL != t->client)
2294 GNUNET_CONTAINER_multihashmap32_put (c->incoming_tunnels,
2295 t->local_tid_dest, t,
2296 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2302 GNUNET_CONTAINER_multihashmap32_put (incoming_tunnels,
2303 t->local_tid_dest, t,
2304 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2314 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
2316 unsigned int own_pos;
2318 for (own_pos = 0; own_pos < p->length; own_pos++)
2320 if (p->peers[own_pos] == myid)
2323 if (own_pos > p->length - 1)
2329 if (own_pos < p->length - 1)
2330 t->next_hop = p->peers[own_pos + 1];
2332 t->next_hop = p->peers[own_pos];
2333 GNUNET_PEER_change_rc (t->next_hop, 1);
2335 t->prev_hop = p->peers[own_pos - 1];
2337 t->prev_hop = p->peers[0];
2338 GNUNET_PEER_change_rc (t->prev_hop, 1);
2340 if (NULL != t->path)
2341 path_destroy (t->path);
2342 t->path = path_duplicate (p);
2345 if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task)
2346 GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task);
2347 t->fwd_maintenance_task =
2348 GNUNET_SCHEDULER_add_delayed (refresh_path_time,
2349 &tunnel_fwd_keepalive, t);
2355 * Notifies a tunnel that a connection has broken that affects at least
2356 * some of its peers. Sends a notification towards the root of the tree.
2357 * In case the peer is the owner of the tree, notifies the client that owns
2358 * the tunnel and tries to reconnect.
2360 * @param t Tunnel affected.
2361 * @param p1 Peer that got disconnected from p2.
2362 * @param p2 Peer that got disconnected from p1.
2364 * @return Short ID of the peer disconnected (either p1 or p2).
2365 * 0 if the tunnel remained unaffected.
2367 static GNUNET_PEER_Id
2368 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2371 // if (myid != p1 && myid != p2) FIXME
2376 // if (tree_get_predecessor (t->tree) != 0)
2378 // /* We are the peer still connected, notify owner of the disconnection. */
2379 // struct GNUNET_MESH_PathBroken msg;
2380 // struct GNUNET_PeerIdentity neighbor;
2382 // msg.header.size = htons (sizeof (msg));
2383 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2384 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2385 // msg.tid = htonl (t->id.tid);
2386 // msg.peer1 = my_full_id;
2387 // GNUNET_PEER_resolve (pid, &msg.peer2);
2388 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2389 // send_prebuilt_message (&msg.header, &neighbor, t);
2396 * Send an end-to-end FWD ACK message for the most recent in-sequence payload.
2398 * @param t Tunnel this is about.
2399 * @param fwd Is for FWD traffic? (ACK dest->owner)
2402 tunnel_send_data_ack (struct MeshTunnel *t, int fwd)
2404 struct GNUNET_MESH_DataACK msg;
2405 struct MeshTunnelReliability *rel;
2406 struct MeshReliableMessage *copy;
2411 rel = fwd ? t->bck_rel : t->fwd_rel;
2412 hop = fwd ? t->prev_hop : t->next_hop;
2413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2414 "send_data_ack for %u\n",
2417 if (GNUNET_NO == t->reliable)
2419 GNUNET_break_op (0);
2422 msg.header.type = htons (fwd ? GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK :
2423 GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK);
2424 msg.header.size = htons (sizeof (msg));
2425 msg.tid = htonl (t->id.tid);
2426 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2427 msg.mid = htonl (rel->mid_recv - 1);
2429 for (copy = rel->head_recv; NULL != copy; copy = copy->next)
2431 delta = copy->mid - rel->mid_recv;
2434 mask = 0x1LL << delta;
2435 msg.futures |= mask;
2436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2437 " setting bit for %u (delta %u) (%llX) -> %llX\n",
2438 copy->mid, delta, mask, msg.futures);
2440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " final futures %llX\n", msg.futures);
2442 send_prebuilt_message (&msg.header, hop, t);
2443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_data_ack END\n");
2448 * Send an ACK informing the predecessor about the available buffer space.
2449 * In case there is no predecessor, inform the owning client.
2450 * If buffering is off, send only on behalf of children or self if endpoint.
2451 * If buffering is on, send when sent to children and buffer space is free.
2452 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
2453 * the ACK itself goes "back" (towards root).
2455 * @param t Tunnel on which to send the ACK.
2456 * @param type Type of message that triggered the ACK transmission.
2457 * @param fwd Is this FWD ACK? (Going dest->owner)
2460 tunnel_send_ack (struct MeshTunnel *t, uint16_t type, int fwd)
2462 struct MeshTunnelReliability *rel;
2463 struct MeshFlowControl *next_fc;
2464 struct MeshFlowControl *prev_fc;
2465 struct MeshClient *c;
2466 struct MeshClient *o;
2472 rel = fwd ? t->fwd_rel : t->bck_rel;
2473 c = fwd ? t->client : t->owner;
2474 o = fwd ? t->owner : t->client;
2475 next_fc = fwd ? &t->next_fc : &t->prev_fc;
2476 prev_fc = fwd ? &t->prev_fc : &t->next_fc;
2477 hop = fwd ? t->prev_hop : t->next_hop;
2481 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2482 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2483 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2485 GNUNET_MESH_DEBUG_M2S (type));
2486 if (GNUNET_YES == t->nobuffer && (GNUNET_NO == t->reliable || NULL == c))
2488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
2491 if (GNUNET_YES == t->reliable && NULL != c)
2492 tunnel_send_data_ack (t, fwd);
2494 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
2495 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
2496 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2497 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2499 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2500 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2501 t->force_ack = GNUNET_YES;
2507 /* Check if we need to transmit the ACK */
2509 prev_fc->last_ack_sent - prev_fc->last_pid_recv > 3 &&
2510 GNUNET_NO == t->force_ack)
2512 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
2513 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2514 " last pid recv: %u, last ack sent: %u\n",
2515 prev_fc->last_pid_recv, prev_fc->last_ack_sent);
2519 /* Ok, ACK might be necessary, what PID to ACK? */
2520 delta = t->queue_max - next_fc->queue_n;
2521 if (NULL != o && GNUNET_YES == t->reliable && NULL != rel->head_sent)
2522 delta_mid = rel->mid_sent - rel->head_sent->mid;
2525 if (0 > delta || (GNUNET_YES == t->reliable &&
2527 (10 < rel->n_sent || 64 <= delta_mid)))
2529 if (NULL != o && delta > 1)
2531 ack = prev_fc->last_pid_recv + delta;
2532 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
2533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2534 " last pid %u, last ack %u, qmax %u, q %u\n",
2535 prev_fc->last_pid_recv, prev_fc->last_ack_sent,
2536 t->queue_max, next_fc->queue_n);
2537 if (ack == prev_fc->last_ack_sent && GNUNET_NO == t->force_ack)
2539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
2543 prev_fc->last_ack_sent = ack;
2545 send_local_ack (t, o, fwd);
2547 send_ack (t, hop, ack);
2549 GNUNET_break (GNUNET_YES == t->destroy);
2550 t->force_ack = GNUNET_NO;
2555 * Modify the mesh message TID from global to local and send to client.
2557 * @param t Tunnel on which to send the message.
2558 * @param msg Message to modify and send.
2559 * @param c Client to send to.
2560 * @param tid Tunnel ID to use (c can be both owner and client).
2563 tunnel_send_client_to_tid (struct MeshTunnel *t,
2564 const struct GNUNET_MESH_Data *msg,
2565 struct MeshClient *c, MESH_TunnelNumber tid)
2567 struct GNUNET_MESH_LocalData *copy;
2568 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
2569 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
2571 if (size < sizeof (struct GNUNET_MessageHeader))
2573 GNUNET_break_op (0);
2581 copy = (struct GNUNET_MESH_LocalData *) cbuf;
2582 memcpy (©[1], &msg[1], size);
2583 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
2584 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
2585 copy->tid = htonl (tid);
2586 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2587 ©->header, GNUNET_NO);
2591 * Modify the unicast message TID from global to local and send to client.
2593 * @param t Tunnel on which to send the message.
2594 * @param msg Message to modify and send.
2595 * @param fwd Forward?
2598 tunnel_send_client_data (struct MeshTunnel *t,
2599 const struct GNUNET_MESH_Data *msg,
2603 tunnel_send_client_to_tid (t, msg, t->client, t->local_tid_dest);
2605 tunnel_send_client_to_tid (t, msg, t->owner, t->local_tid);
2610 * Send up to 64 buffered messages to the client for in order delivery.
2612 * @param t Tunnel on which to empty the message buffer.
2613 * @param c Client to send to.
2614 * @param rel Reliability structure to corresponding peer.
2615 * If rel == t->bck_rel, this is FWD data.
2618 tunnel_send_client_buffered_data (struct MeshTunnel *t, struct MeshClient *c,
2619 struct MeshTunnelReliability *rel)
2622 struct MeshReliableMessage *copy;
2623 struct MeshReliableMessage *next;
2625 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n");
2626 for (copy = rel->head_recv; NULL != copy; copy = next)
2629 if (copy->mid == rel->mid_recv)
2631 struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
2633 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2634 " have %u! now expecting %u\n",
2635 copy->mid, rel->mid_recv + 1);
2636 tunnel_send_client_data (t, msg, (rel == t->bck_rel));
2638 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2643 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2644 " don't have %u, next is %u\n",
2650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n");
2655 * We have received a message out of order, buffer it until we receive
2656 * the missing one and we can feed the rest to the client.
2658 * @param t Tunnel to add to.
2659 * @param msg Message to buffer.
2660 * @param rel Reliability data to the corresponding direction.
2663 tunnel_add_buffered_data (struct MeshTunnel *t,
2664 const struct GNUNET_MESH_Data *msg,
2665 struct MeshTunnelReliability *rel)
2667 struct MeshReliableMessage *copy;
2668 struct MeshReliableMessage *prev;
2672 size = ntohs (msg->header.size);
2673 mid = ntohl (msg->mid);
2674 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data %u\n", mid);
2676 copy = GNUNET_malloc (sizeof (*copy) + size);
2679 memcpy (©[1], msg, size);
2681 // FIXME do something better than O(n), although n < 64...
2682 // FIXME start from the end (most messages are the latest ones)
2683 for (prev = rel->head_recv; NULL != prev; prev = prev->next)
2685 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %u\n", prev->mid);
2686 if (GMC_is_pid_bigger (prev->mid, mid))
2688 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n");
2689 GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv,
2694 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n");
2695 GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy);
2696 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data END\n");
2701 * Destroy a reliable message after it has been acknowledged, either by
2702 * direct mid ACK or bitfield. Updates the appropriate data structures and
2703 * timers and frees all memory.
2705 * @param copy Message that is no longer needed: remote peer got it.
2708 tunnel_free_reliable_message (struct MeshReliableMessage *copy)
2710 struct MeshTunnelReliability *rel;
2711 struct GNUNET_TIME_Relative time;
2714 time = GNUNET_TIME_absolute_get_duration (copy->timestamp);
2715 rel->expected_delay.rel_value *= 7;
2716 rel->expected_delay.rel_value += time.rel_value;
2717 rel->expected_delay.rel_value /= 8;
2719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %u\n", copy->mid);
2720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
2721 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! took %s\n",
2722 GNUNET_STRINGS_relative_time_to_string (time, GNUNET_NO));
2723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n",
2724 GNUNET_STRINGS_relative_time_to_string (rel->expected_delay,
2726 rel->retry_timer = rel->expected_delay;
2727 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2733 * Destroy all reliable messages queued for a tunnel,
2734 * during a tunnel destruction.
2735 * Frees the reliability structure itself.
2737 * @param rel Reliability data for a tunnel.
2740 tunnel_free_reliable_all (struct MeshTunnelReliability *rel)
2742 struct MeshReliableMessage *copy;
2743 struct MeshReliableMessage *next;
2748 for (copy = rel->head_recv; NULL != copy; copy = next)
2751 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2754 for (copy = rel->head_sent; NULL != copy; copy = next)
2757 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2760 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
2761 GNUNET_SCHEDULER_cancel (rel->retry_task);
2767 * Mark future messages as ACK'd.
2769 * @param t Tunnel whose sent buffer to clean.
2770 * @param msg DataACK message with a bitfield of future ACK'd messages.
2771 * @param rel Reliability data.
2774 tunnel_free_sent_reliable (struct MeshTunnel *t,
2775 const struct GNUNET_MESH_DataACK *msg,
2776 struct MeshTunnelReliability *rel)
2778 struct MeshReliableMessage *copy;
2779 struct MeshReliableMessage *next;
2786 bitfield = msg->futures;
2787 mid = ntohl (msg->mid);
2788 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2789 "free_sent_reliable %u %llX\n",
2791 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2792 " rel %p, head %p\n",
2793 rel, rel->head_sent);
2794 for (i = 0, copy = rel->head_sent;
2795 i < 64 && NULL != copy && 0 != bitfield;
2798 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2799 " trying bit %u (mid %u)\n",
2802 if (0 == (bitfield & mask))
2805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n");
2806 /* Bit was set, clear the bit from the bitfield */
2809 /* The i-th bit was set. Do we have that copy? */
2810 /* Skip copies with mid < target */
2811 target = mid + i + 1;
2812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %u\n", target);
2813 while (NULL != copy && GMC_is_pid_bigger (target, copy->mid))
2816 /* Did we run out of copies? (previously freed, it's ok) */
2819 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n");
2823 /* Did we overshoot the target? (previously freed, it's ok) */
2824 if (GMC_is_pid_bigger (copy->mid, target))
2826 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %u\n", copy->mid);
2830 /* Now copy->mid == target, free it */
2832 tunnel_free_reliable_message (copy);
2835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n");
2840 * We haven't received an ACK after a certain time: restransmit the message.
2842 * @param cls Closure (MeshReliableMessage with the message to restransmit)
2843 * @param tc TaskContext.
2846 tunnel_retransmit_message (void *cls,
2847 const struct GNUNET_SCHEDULER_TaskContext *tc)
2849 struct MeshTunnelReliability *rel = cls;
2850 struct MeshReliableMessage *copy;
2851 struct MeshFlowControl *fc;
2852 struct MeshPeerQueue *q;
2853 struct MeshPeerInfo *pi;
2854 struct MeshTunnel *t;
2855 struct GNUNET_MESH_Data *payload;
2858 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
2859 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2863 copy = rel->head_sent;
2870 /* Search the message to be retransmitted in the outgoing queue */
2871 payload = (struct GNUNET_MESH_Data *) ©[1];
2872 hop = rel == t->fwd_rel ? t->next_hop : t->prev_hop;
2873 fc = rel == t->fwd_rel ? &t->prev_fc : &t->next_fc;
2874 pi = peer_get_short (hop);
2875 for (q = pi->queue_head; NULL != q; q = q->next)
2877 if (ntohs (payload->header.type) == q->type)
2879 struct GNUNET_MESH_Data *queued_data = q->cls;
2881 if (queued_data->mid == payload->mid)
2886 /* Message not found in the queue */
2889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid);
2891 fc->last_ack_sent++;
2892 fc->last_pid_recv++;
2893 payload->pid = htonl (fc->last_pid_recv);
2894 send_prebuilt_message (&payload->header, hop, t);
2895 GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
2899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! STILL IN QUEUE %u\n", copy->mid);
2902 rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer);
2903 rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
2904 &tunnel_retransmit_message,
2910 * Send keepalive packets for a tunnel.
2912 * @param t Tunnel to keep alive..
2913 * @param fwd Is this a FWD keepalive? (owner -> dest).
2916 tunnel_keepalive (struct MeshTunnel *t, int fwd)
2918 struct GNUNET_MESH_TunnelKeepAlive *msg;
2919 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
2924 type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE :
2925 GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE;
2926 hop = fwd ? t->next_hop : t->prev_hop;
2928 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2929 "sending %s keepalive for tunnel %d\n",
2930 fwd ? "FWD" : "BCK", t->id.tid);
2932 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
2933 msg->header.size = htons (size);
2934 msg->header.type = htons (type);
2935 msg->oid = *(GNUNET_PEER_resolve2 (t->id.oid));
2936 msg->tid = htonl (t->id.tid);
2937 send_prebuilt_message (&msg->header, hop, t);
2942 * Send keepalive packets for a tunnel.
2944 * @param cls Closure (tunnel for which to send the keepalive).
2945 * @param tc Notification context.
2948 tunnel_recreate (struct MeshTunnel *t, int fwd)
2950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2951 "sending path recreate for tunnel %s[%X]\n",
2952 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
2954 send_path_create (t);
2961 * Generic tunnel timer management.
2962 * Depending on the role of the peer in the tunnel will send the
2963 * appropriate message (build or keepalive)
2965 * @param t Tunnel to maintain.
2969 tunnel_maintain (struct MeshTunnel *t, int fwd)
2973 case MESH_TUNNEL_NEW:
2975 case MESH_TUNNEL_SEARCHING:
2976 /* TODO DHT GET with RO_BART */
2978 case MESH_TUNNEL_WAITING:
2979 tunnel_recreate (t, fwd);
2981 case MESH_TUNNEL_READY:
2982 tunnel_keepalive (t, fwd);
2991 tunnel_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2993 struct MeshTunnel *t = cls;
2995 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2996 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3000 tunnel_maintain (t, GNUNET_YES);
3001 t->fwd_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
3002 &tunnel_fwd_keepalive,
3008 tunnel_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3010 struct MeshTunnel *t = cls;
3012 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3013 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
3017 tunnel_keepalive (t, GNUNET_NO);
3018 t->bck_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
3019 &tunnel_bck_keepalive,
3025 * Send a message to all peers and clients in this tunnel that the tunnel
3026 * is no longer valid. If some peer or client should not receive the message,
3027 * should be zero'ed out before calling this function.
3029 * @param t The tunnel whose peers and clients to notify.
3032 tunnel_send_destroy (struct MeshTunnel *t)
3034 struct GNUNET_MESH_TunnelDestroy msg;
3035 struct GNUNET_PeerIdentity id;
3037 msg.header.size = htons (sizeof (msg));
3038 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
3039 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3040 msg.tid = htonl (t->id.tid);
3041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3042 " sending tunnel destroy for tunnel: %s [%X]\n",
3043 GNUNET_i2s (&msg.oid), t->id.tid);
3045 if (NULL == t->client && 0 != t->next_hop)
3047 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
3048 GNUNET_PEER_resolve (t->next_hop, &id);
3049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3050 " sending forward to %s\n",
3052 send_prebuilt_message (&msg.header, t->next_hop, t);
3054 if (NULL == t->owner && 0 != t->prev_hop)
3056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
3057 GNUNET_PEER_resolve (t->prev_hop, &id);
3058 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3059 " sending back to %s\n",
3061 send_prebuilt_message (&msg.header, t->prev_hop, t);
3063 if (NULL != t->owner)
3065 send_local_tunnel_destroy (t, GNUNET_NO);
3067 if (NULL != t->client)
3069 send_local_tunnel_destroy (t, GNUNET_YES);
3074 tunnel_destroy (struct MeshTunnel *t)
3076 struct MeshClient *c;
3077 struct GNUNET_HashCode hash;
3086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3087 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3089 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3091 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3092 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3100 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels,
3112 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
3113 t->local_tid_dest, t))
3119 GNUNET_CONTAINER_multihashmap32_remove (incoming_tunnels,
3120 t->local_tid_dest, t))
3127 if(GNUNET_YES == t->reliable)
3129 tunnel_free_reliable_all (t->fwd_rel);
3130 tunnel_free_reliable_all (t->bck_rel);
3132 if (0 != t->prev_hop)
3134 peer_cancel_queues (t->prev_hop, t);
3135 GNUNET_PEER_change_rc (t->prev_hop, -1);
3137 if (0 != t->next_hop)
3139 peer_cancel_queues (t->next_hop, t);
3140 GNUNET_PEER_change_rc (t->next_hop, -1);
3142 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task)
3144 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3145 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3147 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task)
3149 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3150 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3153 peer_info_remove_tunnel (peer_get_short (t->dest), t);
3156 if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task)
3157 GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task);
3158 if (GNUNET_SCHEDULER_NO_TASK != t->bck_maintenance_task)
3159 GNUNET_SCHEDULER_cancel (t->bck_maintenance_task);
3162 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
3163 path_destroy (t->path);
3169 * Tunnel is empty: destroy it.
3171 * Notifies all participants (peers, cleints) about the destruction.
3173 * @param t Tunnel to destroy.
3176 tunnel_destroy_empty (struct MeshTunnel *t)
3180 struct GNUNET_PeerIdentity id;
3182 GNUNET_PEER_resolve (t->id.oid, &id);
3183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3184 "executing destruction of empty tunnel %s [%X]\n",
3185 GNUNET_i2s (&id), t->id.tid);
3189 if (GNUNET_NO == t->destroy)
3190 tunnel_send_destroy (t);
3191 if (0 == t->pending_messages)
3194 t->destroy = GNUNET_YES;
3198 * Initialize a Flow Control structure to the initial state.
3200 * @param fc Flow Control structure to initialize.
3203 fc_init (struct MeshFlowControl *fc)
3205 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
3206 fc->last_pid_recv = (uint32_t) -1;
3207 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
3208 fc->last_ack_recv = (uint32_t) -1;
3209 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3210 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
3215 * Create a new tunnel
3217 * @param owner Who is the owner of the tunnel (short ID).
3218 * @param tid Tunnel Number of the tunnel.
3219 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
3220 * @param local Tunnel Number for the tunnel, for the client point of view.
3222 * @return A new initialized tunnel. NULL on error.
3224 static struct MeshTunnel *
3225 tunnel_new (GNUNET_PEER_Id owner,
3226 MESH_TunnelNumber tid,
3227 struct MeshClient *client,
3228 MESH_TunnelNumber local)
3230 struct MeshTunnel *t;
3231 struct GNUNET_HashCode hash;
3233 if (n_tunnels >= max_tunnels && NULL == client)
3236 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3239 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
3241 fc_init (&t->next_fc);
3242 fc_init (&t->prev_fc);
3245 t->local_tid = local;
3247 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
3249 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3251 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3252 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3259 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3267 GNUNET_CONTAINER_multihashmap32_put (client->own_tunnels,
3269 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3273 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3283 * Set options in a tunnel, extracted from a bit flag field
3285 * @param t Tunnel to set options to.
3286 * @param options Bit array in host byte order.
3289 tunnel_set_options (struct MeshTunnel *t, uint32_t options)
3291 t->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
3292 GNUNET_YES : GNUNET_NO;
3293 t->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
3294 GNUNET_YES : GNUNET_NO;
3299 * Iterator for deleting each tunnel whose client endpoint disconnected.
3301 * @param cls Closure (client that has disconnected).
3302 * @param key The local tunnel id (used to access the hashmap).
3303 * @param value The value stored at the key (tunnel to destroy).
3305 * @return GNUNET_OK, keep iterating.
3308 tunnel_destroy_iterator (void *cls,
3312 struct MeshTunnel *t = value;
3313 struct MeshClient *c = cls;
3315 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3316 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
3317 t->local_tid, t->local_tid_dest, c->id);
3318 client_delete_tunnel (c, t);
3321 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
3323 if (0 != t->next_hop) { /* destroy could come before a path is used */
3324 GNUNET_PEER_change_rc (t->next_hop, -1);
3330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
3332 if (0 != t->prev_hop) { /* destroy could come before a path is used */
3333 GNUNET_PEER_change_rc (t->prev_hop, -1);
3338 tunnel_destroy_empty (t);
3345 * remove client's ports from the global hashmap on diconnect.
3347 * @param cls Closure (unused).
3349 * @param value ThClient structure.
3351 * @return GNUNET_OK, keep iterating.
3354 client_release_ports (void *cls,
3360 res = GNUNET_CONTAINER_multihashmap32_remove (ports, key, value);
3361 if (GNUNET_YES != res)
3364 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3365 "Port %u by client %p was not registered.\n",
3372 * Timeout function due to lack of keepalive/traffic from the owner.
3373 * Destroys tunnel if called.
3375 * @param cls Closure (tunnel to destroy).
3376 * @param tc TaskContext
3379 tunnel_fwd_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3381 struct MeshTunnel *t = cls;
3383 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3384 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3387 "Tunnel %s [%X] FWD timed out. Destroying.\n",
3388 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3389 if (NULL != t->client)
3390 send_local_tunnel_destroy (t, GNUNET_YES);
3391 tunnel_destroy (t); /* Do not notify other */
3396 * Timeout function due to lack of keepalive/traffic from the destination.
3397 * Destroys tunnel if called.
3399 * @param cls Closure (tunnel to destroy).
3400 * @param tc TaskContext
3403 tunnel_bck_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3405 struct MeshTunnel *t = cls;
3407 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3408 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3410 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3411 "Tunnel %s [%X] BCK timed out. Destroying.\n",
3412 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3413 if (NULL != t->owner)
3414 send_local_tunnel_destroy (t, GNUNET_NO);
3415 tunnel_destroy (t); /* Do not notify other */
3420 * Resets the tunnel timeout task, some other message has done the task's job.
3421 * - For the first peer on the direction this means to send
3422 * a keepalive or a path confirmation message (either create or ACK).
3423 * - For all other peers, this means to destroy the tunnel,
3424 * due to lack of activity.
3425 * Starts the tiemout if no timeout was running (tunnel just created).
3427 * @param t Tunnel whose timeout to reset.
3428 * @param fwd Is this forward?
3430 * TODO use heap to improve efficiency of scheduler.
3433 tunnel_reset_timeout (struct MeshTunnel *t, int fwd)
3435 GNUNET_SCHEDULER_TaskIdentifier *ti;
3436 GNUNET_SCHEDULER_Task f;
3437 struct MeshClient *c;
3439 ti = fwd ? &t->fwd_maintenance_task : &t->bck_maintenance_task;
3440 c = fwd ? t->owner : t->client;
3442 if (GNUNET_SCHEDULER_NO_TASK != *ti)
3443 GNUNET_SCHEDULER_cancel (*ti);
3447 f = fwd ? &tunnel_fwd_keepalive : &tunnel_bck_keepalive;
3448 *ti = GNUNET_SCHEDULER_add_delayed (refresh_path_time, f, t);
3452 f = fwd ? &tunnel_fwd_timeout : &tunnel_bck_timeout;
3453 *ti = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3454 (refresh_path_time, 4),
3460 /******************************************************************************/
3461 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3462 /******************************************************************************/
3465 * Free a transmission that was already queued with all resources
3466 * associated to the request.
3468 * @param queue Queue handler to cancel.
3469 * @param clear_cls Is it necessary to free associated cls?
3472 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3474 struct MeshFlowControl *fc;
3476 if (GNUNET_YES == clear_cls)
3478 switch (queue->type)
3480 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3481 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3482 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3484 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3485 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3486 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3487 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3488 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3489 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3490 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3491 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3493 " prebuilt message\n");
3494 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3496 GNUNET_MESH_DEBUG_M2S (queue->type));
3498 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3503 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3504 " type %s unknown!\n",
3505 GNUNET_MESH_DEBUG_M2S (queue->type));
3507 GNUNET_free_non_null (queue->cls);
3509 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3510 queue->peer->queue_tail,
3513 /* Delete from appropriate fc in the tunnel */
3514 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type ||
3515 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type )
3517 if (queue->peer->id == queue->tunnel->prev_hop)
3518 fc = &queue->tunnel->prev_fc;
3519 else if (queue->peer->id == queue->tunnel->next_hop)
3520 fc = &queue->tunnel->next_fc;
3524 GNUNET_free (queue);
3529 GNUNET_free (queue);
3534 * @brief Get the next transmittable message from the queue.
3536 * This will be the head, except in the case of being a data packet
3537 * not allowed by the destination peer.
3539 * @param peer Destination peer.
3541 * @return The next viable MeshPeerQueue element to send to that peer.
3542 * NULL when there are no transmittable messages.
3544 struct MeshPeerQueue *
3545 queue_get_next (const struct MeshPeerInfo *peer)
3547 struct MeshPeerQueue *q;
3549 struct GNUNET_MESH_Data *dmsg;
3550 struct MeshTunnel* t;
3554 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
3555 for (q = peer->queue_head; NULL != q; q = q->next)
3558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3560 GNUNET_MESH_DEBUG_M2S (q->type));
3561 dmsg = (struct GNUNET_MESH_Data *) q->cls;
3562 pid = ntohl (dmsg->pid);
3565 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3566 ack = t->next_fc.last_ack_recv;
3568 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3569 ack = t->prev_fc.last_ack_recv;
3572 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3577 "* ACK: %u, PID: %u, MID: %u\n",
3578 ack, pid, ntohl (dmsg->mid));
3579 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
3581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3591 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3592 "* nothing found\n");
3598 queue_send (void *cls, size_t size, void *buf)
3600 struct MeshPeerInfo *peer = cls;
3601 struct GNUNET_MessageHeader *msg;
3602 struct MeshPeerQueue *queue;
3603 struct MeshTunnel *t;
3604 struct GNUNET_PeerIdentity dst_id;
3605 struct MeshFlowControl *fc;
3610 peer->core_transmit = NULL;
3612 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
3614 if (NULL == buf || 0 ==size)
3616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Buffer size 0.\n");
3619 queue = queue_get_next (peer);
3621 /* Queue has no internal mesh traffic nor sendable payload */
3624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
3625 if (NULL == peer->queue_head)
3626 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
3630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
3632 GNUNET_PEER_resolve (peer->id, &dst_id);
3633 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3635 GNUNET_i2s (&dst_id));
3636 /* Check if buffer size is enough for the message */
3637 if (queue->size > size)
3639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3640 "* not enough room, reissue\n");
3641 peer->core_transmit =
3642 GNUNET_CORE_notify_transmit_ready (core_handle,
3645 GNUNET_TIME_UNIT_FOREVER_REL,
3652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
3655 GNUNET_assert (0 < t->pending_messages);
3656 t->pending_messages--;
3660 switch (queue->type)
3663 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3664 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3665 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3666 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3667 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3668 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3669 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3670 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3671 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3672 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3674 GNUNET_MESH_DEBUG_M2S (queue->type));
3676 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3677 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3678 data_size = send_core_data_raw (queue->cls, size, buf);
3679 msg = (struct GNUNET_MessageHeader *) buf;
3680 type = ntohs (msg->type);
3682 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3683 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
3684 data_size = send_core_path_create (queue->cls, size, buf);
3686 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
3688 data_size = send_core_path_ack (queue->cls, size, buf);
3692 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3693 "* type unknown: %u\n",
3698 if (0 < drop_percent &&
3699 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
3701 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3702 "Dropping message of type %s\n",
3703 GNUNET_MESH_DEBUG_M2S(queue->type));
3706 /* Free queue, but cls was freed by send_core_* */
3707 queue_destroy (queue, GNUNET_NO);
3709 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
3710 pid = ((struct GNUNET_MESH_Data *) buf)->pid;
3714 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3715 t->next_fc.last_pid_sent = pid;
3716 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES);
3717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3719 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3721 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3722 t->prev_fc.last_pid_sent = pid;
3723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3725 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3726 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO);
3732 /* If more data in queue, send next */
3733 queue = queue_get_next (peer);
3736 struct GNUNET_PeerIdentity id;
3738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
3739 GNUNET_PEER_resolve (peer->id, &id);
3740 peer->core_transmit =
3741 GNUNET_CORE_notify_transmit_ready(core_handle,
3744 GNUNET_TIME_UNIT_FOREVER_REL,
3750 if (peer->id == t->next_hop)
3752 else if (peer->id == t->prev_hop)
3757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "id: %u, next: %u, prev: %u\n",
3758 peer->id, t->next_hop, t->prev_hop);
3761 if (NULL != peer->queue_head)
3763 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task && fc->queue_n > 0)
3765 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3766 "* %s starting poll timeout\n",
3767 GNUNET_i2s (&my_full_id));
3768 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3774 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
3776 GNUNET_SCHEDULER_cancel (fc->poll_task);
3777 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3780 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3782 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
3785 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
3791 * @brief Queue and pass message to core when possible.
3793 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3794 * accounts for it. In case the queue is full, the message is dropped and
3797 * Otherwise, message is treated as internal and allowed to go regardless of
3800 * @param cls Closure (@c type dependant). It will be used by queue_send to
3801 * build the message to be sent if not already prebuilt.
3802 * @param type Type of the message, 0 for a raw message.
3803 * @param size Size of the message.
3804 * @param dst Neighbor to send message to.
3805 * @param t Tunnel this message belongs to.
3808 queue_add (void *cls, uint16_t type, size_t size,
3809 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3811 struct MeshPeerQueue *queue;
3812 struct MeshFlowControl *fc;
3816 priority = GNUNET_NO;
3817 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3821 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3827 if (fc->queue_n >= t->queue_max)
3829 /* If this isn't a retransmission, drop the message */
3830 if (GNUNET_NO == t->reliable ||
3831 (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) ||
3832 (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type))
3834 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
3837 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3838 "queue full: %u/%u\n",
3839 fc->queue_n, t->queue_max);
3840 return; /* Drop this message */
3842 priority = GNUNET_YES;
3845 if (GMC_is_pid_bigger(fc->last_pid_sent + 1, fc->last_ack_recv) &&
3846 GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
3847 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3851 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3857 if (GNUNET_YES == priority)
3859 struct GNUNET_MESH_Data *d;
3863 GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue);
3864 d = (struct GNUNET_MESH_Data *) queue->cls;
3866 for (queue = dst->queue_tail; NULL != queue; queue = queue->prev)
3868 if (queue->type != type)
3870 d = (struct GNUNET_MESH_Data *) queue->cls;
3877 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3879 if (NULL == dst->core_transmit)
3881 dst->core_transmit =
3882 GNUNET_CORE_notify_transmit_ready (core_handle,
3885 GNUNET_TIME_UNIT_FOREVER_REL,
3886 GNUNET_PEER_resolve2 (dst->id),
3891 t->pending_messages++;
3895 /******************************************************************************/
3896 /******************** MESH NETWORK HANDLERS **************************/
3897 /******************************************************************************/
3901 * Core handler for path creation
3903 * @param cls closure
3904 * @param message message
3905 * @param peer peer identity this notification is about
3907 * @return GNUNET_OK to keep the connection open,
3908 * GNUNET_SYSERR to close it (signal serious error)
3911 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3912 const struct GNUNET_MessageHeader *message)
3914 unsigned int own_pos;
3917 MESH_TunnelNumber tid;
3918 struct GNUNET_MESH_CreateTunnel *msg;
3919 struct GNUNET_PeerIdentity *pi;
3920 struct MeshPeerPath *path;
3921 struct MeshPeerInfo *dest_peer_info;
3922 struct MeshPeerInfo *orig_peer_info;
3923 struct MeshTunnel *t;
3925 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3926 "Received a path create msg [%s]\n",
3927 GNUNET_i2s (&my_full_id));
3928 size = ntohs (message->size);
3929 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3931 GNUNET_break_op (0);
3935 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3936 if (size % sizeof (struct GNUNET_PeerIdentity))
3938 GNUNET_break_op (0);
3941 size /= sizeof (struct GNUNET_PeerIdentity);
3944 GNUNET_break_op (0);
3947 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3948 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3950 tid = ntohl (msg->tid);
3951 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3953 " path is for tunnel %s[%X]:%u.\n",
3954 GNUNET_i2s (pi), tid, ntohl (msg->port));
3955 t = tunnel_get (pi, tid);
3956 if (NULL == t) /* might be a local tunnel */
3960 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3961 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3967 t->port = ntohl (msg->port);
3968 opt = ntohl (msg->opt);
3969 if (0 != (opt & GNUNET_MESH_OPTION_NOBUFFER))
3971 t->nobuffer = GNUNET_YES;
3974 if (0 != (opt & GNUNET_MESH_OPTION_RELIABLE))
3976 t->reliable = GNUNET_YES;
3978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3980 tunnel_reset_timeout (t, GNUNET_YES);
3981 tunnel_change_state (t, MESH_TUNNEL_WAITING);
3983 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3984 if (NULL == dest_peer_info)
3986 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3987 " Creating PeerInfo for destination.\n");
3988 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3989 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3990 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3992 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3994 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3995 if (NULL == orig_peer_info)
3997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3998 " Creating PeerInfo for origin.\n");
3999 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
4000 orig_peer_info->id = GNUNET_PEER_intern (pi);
4001 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
4002 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
4004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
4005 path = path_new (size);
4007 for (i = 0; i < size; i++)
4009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
4010 GNUNET_i2s (&pi[i]));
4011 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
4012 if (path->peers[i] == myid)
4015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
4016 if (own_pos == 0 && path->peers[own_pos] != myid)
4018 /* create path: self not found in path through self */
4019 GNUNET_break_op (0);
4020 path_destroy (path);
4024 path_add_to_peers (path, GNUNET_NO);
4025 tunnel_use_path (t, path);
4027 peer_info_add_tunnel (dest_peer_info, t);
4029 if (own_pos == size - 1)
4031 struct MeshClient *c;
4033 /* Find target client */
4034 c = GNUNET_CONTAINER_multihashmap32_get (ports, t->port);
4037 /* TODO send reject */
4041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4042 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
4044 /* Assign local tid */
4045 while (NULL != tunnel_get_incoming (next_local_tid))
4046 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4047 t->local_tid_dest = next_local_tid++;
4048 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
4050 if (GNUNET_YES == t->reliable)
4052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
4053 t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
4055 t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
4058 tunnel_add_client (t, c);
4059 send_local_tunnel_create (t);
4061 /* Eliminate tunnel when origin dies */
4062 tunnel_reset_timeout (t, GNUNET_YES);
4063 /* Keep tunnel alive in direction dest->owner*/
4064 tunnel_reset_timeout (t, GNUNET_NO);
4068 struct MeshPeerPath *path2;
4070 t->next_hop = path->peers[own_pos + 1];
4071 GNUNET_PEER_change_rc(t->next_hop, 1);
4073 /* It's for somebody else! Retransmit. */
4074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
4075 path2 = path_duplicate (path);
4076 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
4077 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
4078 send_path_create (t);
4086 * Core handler for path ACKs
4088 * @param cls closure
4089 * @param message message
4090 * @param peer peer identity this notification is about
4092 * @return GNUNET_OK to keep the connection open,
4093 * GNUNET_SYSERR to close it (signal serious error)
4096 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4097 const struct GNUNET_MessageHeader *message)
4099 struct GNUNET_MESH_PathACK *msg;
4100 struct MeshPeerInfo *peer_info;
4101 struct MeshPeerPath *p;
4102 struct MeshTunnel *t;
4104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4105 GNUNET_i2s (&my_full_id));
4106 msg = (struct GNUNET_MESH_PathACK *) message;
4107 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4110 /* TODO notify that we don't know the tunnel */
4111 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4112 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4113 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4117 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4119 peer_info = peer_get (&msg->peer_id);
4120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4121 GNUNET_i2s (&msg->peer_id));
4122 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4125 /* Add path to peers? */
4129 path_add_to_peers (p, GNUNET_YES);
4135 tunnel_change_state (t, MESH_TUNNEL_READY);
4136 tunnel_reset_timeout (t, GNUNET_NO);
4137 t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0;
4138 t->prev_fc.last_ack_sent = ntohl (msg->ack);
4140 /* Message for us? */
4141 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4144 if (NULL == t->owner)
4146 GNUNET_break_op (0);
4149 if (NULL != peer_info->dhtget)
4151 GNUNET_DHT_get_stop (peer_info->dhtget);
4152 peer_info->dhtget = NULL;
4154 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_YES);
4155 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_NO);
4159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4160 " not for us, retransmitting...\n");
4161 send_prebuilt_message (message, t->prev_hop, t);
4167 * Core handler for notifications of broken paths
4169 * @param cls closure
4170 * @param message message
4171 * @param peer peer identity this notification is about
4173 * @return GNUNET_OK to keep the connection open,
4174 * GNUNET_SYSERR to close it (signal serious error)
4177 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4178 const struct GNUNET_MessageHeader *message)
4180 struct GNUNET_MESH_PathBroken *msg;
4181 struct MeshTunnel *t;
4183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4184 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4185 msg = (struct GNUNET_MESH_PathBroken *) message;
4186 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4187 GNUNET_i2s (&msg->peer1));
4188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4189 GNUNET_i2s (&msg->peer2));
4190 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4193 GNUNET_break_op (0);
4196 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4197 GNUNET_PEER_search (&msg->peer2));
4204 * Core handler for tunnel destruction
4206 * @param cls closure
4207 * @param message message
4208 * @param peer peer identity this notification is about
4210 * @return GNUNET_OK to keep the connection open,
4211 * GNUNET_SYSERR to close it (signal serious error)
4214 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4215 const struct GNUNET_MessageHeader *message)
4217 struct GNUNET_MESH_TunnelDestroy *msg;
4218 struct MeshTunnel *t;
4220 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4221 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4222 "Got a TUNNEL DESTROY packet from %s\n",
4224 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4225 " for tunnel %s [%u]\n",
4226 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4227 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4230 /* Probably already got the message from another path,
4231 * destroyed the tunnel and retransmitted to children.
4234 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
4238 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4241 t->local_tid, t->local_tid_dest);
4243 if (GNUNET_PEER_search (peer) == t->prev_hop)
4245 // TODO check owner's signature
4246 // TODO add owner's signatue to tunnel for retransmission
4247 peer_cancel_queues (t->prev_hop, t);
4248 GNUNET_PEER_change_rc (t->prev_hop, -1);
4251 else if (GNUNET_PEER_search (peer) == t->next_hop)
4253 // TODO check dest's signature
4254 // TODO add dest's signatue to tunnel for retransmission
4255 peer_cancel_queues (t->next_hop, t);
4256 GNUNET_PEER_change_rc (t->next_hop, -1);
4261 GNUNET_break_op (0);
4262 // TODO check both owner AND destination's signature to see which matches
4263 // TODO restransmit in appropriate direction
4266 tunnel_destroy_empty (t);
4268 // TODO: add timeout to destroy the tunnel anyway
4274 * Generic handler for mesh network payload traffic.
4276 * @param peer Peer identity this notification is about.
4277 * @param message Data message.
4278 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
4280 * @return GNUNET_OK to keep the connection open,
4281 * GNUNET_SYSERR to close it (signal serious error)
4284 handle_mesh_data (const struct GNUNET_PeerIdentity *peer,
4285 const struct GNUNET_MessageHeader *message,
4288 struct GNUNET_MESH_Data *msg;
4289 struct MeshFlowControl *fc;
4290 struct MeshTunnelReliability *rel;
4291 struct MeshTunnel *t;
4292 struct MeshClient *c;
4300 size = ntohs (message->size);
4302 sizeof (struct GNUNET_MESH_Data) +
4303 sizeof (struct GNUNET_MessageHeader))
4308 type =ntohs (message->type);
4309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
4310 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4311 msg = (struct GNUNET_MESH_Data *) message;
4312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
4313 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
4315 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4318 /* TODO notify back: we don't know this tunnel */
4319 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "WARNING tunnel unknown\n");
4324 /* Initialize FWD/BCK data */
4325 pid = ntohl (msg->pid);
4326 fc = fwd ? &t->prev_fc : &t->next_fc;
4327 c = fwd ? t->client : t->owner;
4328 rel = fwd ? t->bck_rel : t->fwd_rel;
4329 hop = fwd ? t->next_hop : t->prev_hop;
4330 if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
4332 GNUNET_STATISTICS_update (stats, "# unsolicited data", 1, GNUNET_NO);
4333 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4334 "WARNING Received PID %u, (prev %u), ACK %u\n",
4335 pid, fc->last_pid_recv, fc->last_ack_sent);
4339 tunnel_change_state (t, MESH_TUNNEL_READY);
4340 tunnel_reset_timeout (t, fwd);
4343 /* TODO signature verification */
4344 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us! sending to client\n");
4345 GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
4346 if (GMC_is_pid_bigger (pid, fc->last_pid_recv))
4350 mid = ntohl (msg->mid);
4351 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4352 " pid %u (mid %u) not seen yet\n", pid, mid);
4353 fc->last_pid_recv = pid;
4355 if (GNUNET_NO == t->reliable ||
4356 ( !GMC_is_pid_bigger (rel->mid_recv, mid) &&
4357 GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) )
4359 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4360 "!!! RECV %u\n", ntohl (msg->mid));
4361 if (GNUNET_YES == t->reliable)
4363 /* Is this the exact next expected messasge? */
4364 if (mid == rel->mid_recv)
4366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
4368 tunnel_send_client_data (t, msg, fwd);
4369 tunnel_send_client_buffered_data (t, c, rel);
4373 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
4374 tunnel_add_buffered_data (t, msg, rel);
4377 else /* Tunnel unreliable, send to clients directly */
4379 tunnel_send_client_data (t, msg, fwd);
4384 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4385 " MID %u not expected (%u - %u), dropping!\n",
4386 ntohl (msg->mid), rel->mid_recv, rel->mid_recv + 64);
4391 // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
4392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4393 " Pid %u not expected (%u+), dropping!\n",
4394 pid, fc->last_pid_recv + 1);
4396 tunnel_send_ack (t, type, fwd);
4399 fc->last_pid_recv = pid;
4402 GNUNET_STATISTICS_update (stats, "# data on dying tunnel", 1, GNUNET_NO);
4403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "data on dying tunnel %s[%X]\n",
4404 GNUNET_PEER_resolve2 (t->id.oid), ntohl (msg->tid));
4405 return GNUNET_OK; /* Next hop has destoyed the tunnel, drop */
4407 ttl = ntohl (msg->ttl);
4408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4411 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4412 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4413 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, fwd);
4419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
4420 send_prebuilt_message (message, hop, t);
4421 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4428 * Core handler for mesh network traffic going from the origin to a peer
4430 * @param cls Closure (unused).
4431 * @param message Message received.
4432 * @param peer Peer who sent the message.
4434 * @return GNUNET_OK to keep the connection open,
4435 * GNUNET_SYSERR to close it (signal serious error)
4438 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4439 const struct GNUNET_MessageHeader *message)
4441 return handle_mesh_data (peer, message, GNUNET_YES);
4445 * Core handler for mesh network traffic towards the owner of a tunnel.
4447 * @param cls Closure (unused).
4448 * @param message Message received.
4449 * @param peer Peer who sent the message.
4451 * @return GNUNET_OK to keep the connection open,
4452 * GNUNET_SYSERR to close it (signal serious error)
4455 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4456 const struct GNUNET_MessageHeader *message)
4458 return handle_mesh_data (peer, message, GNUNET_NO);
4463 * Core handler for mesh network traffic end-to-end ACKs.
4465 * @param cls Closure.
4466 * @param message Message.
4467 * @param peer Peer identity this notification is about.
4469 * @return GNUNET_OK to keep the connection open,
4470 * GNUNET_SYSERR to close it (signal serious error)
4473 handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4474 const struct GNUNET_MessageHeader *message)
4476 struct GNUNET_MESH_DataACK *msg;
4477 struct MeshTunnelReliability *rel;
4478 struct MeshReliableMessage *copy;
4479 struct MeshReliableMessage *next;
4480 struct MeshTunnel *t;
4486 type = ntohs (message->type);
4487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message from %s!\n",
4488 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4489 msg = (struct GNUNET_MESH_DataACK *) message;
4491 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4494 /* TODO notify that we dont know this tunnel (whom)? */
4495 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4498 ack = ntohl (msg->mid);
4499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4501 /* Is this a forward or backward ACK? */
4502 id = GNUNET_PEER_search (peer);
4503 if (t->next_hop == id && GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type)
4505 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4506 if (NULL == t->owner)
4508 send_prebuilt_message (message, t->prev_hop, t);
4513 else if (t->prev_hop == id && GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK == type)
4515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4516 if (NULL == t->client)
4518 send_prebuilt_message (message, t->next_hop, t);
4525 GNUNET_break_op (0);
4529 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %u\n", ack);
4530 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
4532 if (GMC_is_pid_bigger (copy->mid, ack))
4534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
4535 tunnel_free_sent_reliable (t, msg, rel);
4539 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
4541 tunnel_free_reliable_message (copy);
4543 /* Once buffers have been free'd, send ACK */
4544 tunnel_send_ack (t, type, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type);
4546 /* If some message was free'd, update the retransmission delay*/
4547 if (GNUNET_YES == work)
4549 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
4551 GNUNET_SCHEDULER_cancel (rel->retry_task);
4552 if (NULL == rel->head_sent)
4554 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
4558 struct GNUNET_TIME_Absolute new_target;
4559 struct GNUNET_TIME_Relative delay;
4561 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
4562 MESH_RETRANSMIT_MARGIN);
4563 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
4565 delay = GNUNET_TIME_absolute_get_remaining (new_target);
4567 GNUNET_SCHEDULER_add_delayed (delay,
4568 &tunnel_retransmit_message,
4579 * Core handler for mesh network traffic point-to-point acks.
4581 * @param cls closure
4582 * @param message message
4583 * @param peer peer identity this notification is about
4585 * @return GNUNET_OK to keep the connection open,
4586 * GNUNET_SYSERR to close it (signal serious error)
4589 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4590 const struct GNUNET_MessageHeader *message)
4592 struct GNUNET_MESH_ACK *msg;
4593 struct MeshTunnel *t;
4594 struct MeshFlowControl *fc;
4598 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4600 msg = (struct GNUNET_MESH_ACK *) message;
4602 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4606 /* TODO notify that we dont know this tunnel (whom)? */
4607 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4610 ack = ntohl (msg->pid);
4611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4613 /* Is this a forward or backward ACK? */
4614 id = GNUNET_PEER_search (peer);
4615 if (t->next_hop == id)
4617 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4620 else if (t->prev_hop == id)
4622 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4627 GNUNET_break_op (0);
4631 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
4632 GMC_is_pid_bigger (ack, fc->last_ack_recv))
4634 GNUNET_SCHEDULER_cancel (fc->poll_task);
4635 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4636 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4639 fc->last_ack_recv = ack;
4640 peer_unlock_queue (id);
4641 tunnel_change_state (t, MESH_TUNNEL_READY);
4643 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, t->next_hop == id);
4650 * Core handler for mesh network traffic point-to-point ack polls.
4652 * @param cls closure
4653 * @param message message
4654 * @param peer peer identity this notification is about
4656 * @return GNUNET_OK to keep the connection open,
4657 * GNUNET_SYSERR to close it (signal serious error)
4660 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4661 const struct GNUNET_MessageHeader *message)
4663 struct GNUNET_MESH_Poll *msg;
4664 struct MeshTunnel *t;
4665 struct MeshFlowControl *fc;
4670 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a POLL packet from %s!\n",
4673 msg = (struct GNUNET_MESH_Poll *) message;
4675 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4679 /* TODO notify that we dont know this tunnel (whom)? */
4680 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4681 GNUNET_break_op (0);
4685 /* Is this a forward or backward ACK? */
4686 id = GNUNET_PEER_search (peer);
4687 pid = ntohl (msg->pid);
4688 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid);
4689 if (t->next_hop == id)
4691 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4693 old = fc->last_pid_recv;
4695 else if (t->prev_hop == id)
4697 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4699 old = fc->last_pid_recv;
4707 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", fc->last_pid_recv);
4708 fc->last_pid_recv = pid;
4709 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, t->prev_hop == id);
4711 if (GNUNET_YES == t->reliable)
4712 fc->last_pid_recv = old;
4719 * Core handler for mesh keepalives.
4721 * @param cls closure
4722 * @param message message
4723 * @param peer peer identity this notification is about
4724 * @return GNUNET_OK to keep the connection open,
4725 * GNUNET_SYSERR to close it (signal serious error)
4727 * TODO: Check who we got this from, to validate route.
4730 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4731 const struct GNUNET_MessageHeader *message)
4733 struct GNUNET_MESH_TunnelKeepAlive *msg;
4734 struct MeshTunnel *t;
4735 struct MeshClient *c;
4739 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4743 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4746 /* TODO notify that we dont know that tunnel */
4747 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4752 fwd = GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE == ntohs (message->type) ?
4753 GNUNET_YES : GNUNET_NO;
4754 c = fwd ? t->client : t->owner;
4755 hop = fwd ? t->next_hop : t->prev_hop;
4758 tunnel_change_state (t, MESH_TUNNEL_READY);
4759 tunnel_reset_timeout (t, fwd);
4760 if (NULL != c || 0 == hop || myid == hop)
4763 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4764 send_prebuilt_message (message, hop, t);
4771 * Functions to handle messages from core
4773 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4774 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4775 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4776 sizeof (struct GNUNET_MESH_PathBroken)},
4777 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4778 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4779 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4780 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4781 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK,
4782 sizeof (struct GNUNET_MESH_DataACK)},
4783 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK,
4784 sizeof (struct GNUNET_MESH_DataACK)},
4785 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE,
4786 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4787 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE,
4788 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4789 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4790 sizeof (struct GNUNET_MESH_ACK)},
4791 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4792 sizeof (struct GNUNET_MESH_Poll)},
4793 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4794 sizeof (struct GNUNET_MESH_PathACK)},
4800 * Function to process paths received for a new peer addition. The recorded
4801 * paths form the initial tunnel, which can be optimized later.
4802 * Called on each result obtained for the DHT search.
4804 * @param cls closure
4805 * @param exp when will this value expire
4806 * @param key key of the result
4807 * @param get_path path of the get request
4808 * @param get_path_length lenght of get_path
4809 * @param put_path path of the put request
4810 * @param put_path_length length of the put_path
4811 * @param type type of the result
4812 * @param size number of bytes in data
4813 * @param data pointer to the result data
4816 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4817 const struct GNUNET_HashCode * key,
4818 const struct GNUNET_PeerIdentity *get_path,
4819 unsigned int get_path_length,
4820 const struct GNUNET_PeerIdentity *put_path,
4821 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4822 size_t size, const void *data)
4824 struct MeshPeerInfo *peer = cls;
4825 struct MeshPeerPath *p;
4826 struct GNUNET_PeerIdentity pi;
4829 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4830 GNUNET_PEER_resolve (peer->id, &pi);
4831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4833 p = path_build_from_dht (get_path, get_path_length,
4834 put_path, put_path_length);
4835 path_add_to_peers (p, GNUNET_NO);
4837 for (i = 0; i < peer->ntunnels; i++)
4839 struct GNUNET_PeerIdentity id;
4841 GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id);
4842 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n",
4843 GNUNET_i2s (&id), peer->tunnels[i]->id.tid,
4844 peer->tunnels[i]->local_tid,
4845 peer->tunnels[i]->local_tid_dest);
4846 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
4848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
4849 peer_connect (peer, peer->tunnels[i]);
4857 /******************************************************************************/
4858 /********************* MESH LOCAL HANDLES **************************/
4859 /******************************************************************************/
4863 * Handler for client connection.
4865 * @param cls Closure (unused).
4866 * @param client Client handler.
4869 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
4871 struct MeshClient *c;
4875 c = GNUNET_malloc (sizeof (struct MeshClient));
4877 GNUNET_SERVER_client_keep (client);
4878 GNUNET_SERVER_client_set_user_context (client, c);
4879 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4884 * Handler for client disconnection
4886 * @param cls closure
4887 * @param client identification of the client; NULL
4888 * for the last call when the server is destroyed
4891 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4893 struct MeshClient *c;
4894 struct MeshClient *next;
4896 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
4899 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4903 c = client_get (client);
4906 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u, %p)\n",
4908 GNUNET_SERVER_client_drop (c->handle);
4909 c->shutting_down = GNUNET_YES;
4910 if (NULL != c->own_tunnels)
4912 GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels,
4913 &tunnel_destroy_iterator, c);
4914 GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels);
4917 if (NULL != c->incoming_tunnels)
4919 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels,
4920 &tunnel_destroy_iterator, c);
4921 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels);
4924 if (NULL != c->ports)
4926 GNUNET_CONTAINER_multihashmap32_iterate (c->ports,
4927 &client_release_ports, c);
4928 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
4931 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c);
4934 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4939 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
4941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4947 * Handler for new clients
4949 * @param cls closure
4950 * @param client identification of the client
4951 * @param message the actual message, which includes messages the client wants
4954 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4955 const struct GNUNET_MessageHeader *message)
4957 struct GNUNET_MESH_ClientConnect *cc_msg;
4958 struct MeshClient *c;
4963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
4965 /* Check data sanity */
4966 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4967 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4968 if (0 != (size % sizeof (uint32_t)))
4971 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4974 size /= sizeof (uint32_t);
4976 /* Initialize new client structure */
4977 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
4978 c->id = next_client_id++; /* overflow not important: just for debug */
4979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
4980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
4985 p = (uint32_t *) &cc_msg[1];
4986 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
4987 for (i = 0; i < size; i++)
4990 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
4992 /* store in client's hashmap */
4993 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
4994 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4995 /* store in global hashmap */
4996 /* FIXME only allow one client to have the port open,
4997 * have a backup hashmap with waiting clients */
4998 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
4999 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
5003 c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5004 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5005 GNUNET_SERVER_notification_context_add (nc, client);
5006 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
5008 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
5014 * Handler for requests of new tunnels
5016 * @param cls Closure.
5017 * @param client Identification of the client.
5018 * @param message The actual message.
5021 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
5022 const struct GNUNET_MessageHeader *message)
5024 struct GNUNET_MESH_TunnelMessage *t_msg;
5025 struct MeshPeerInfo *peer_info;
5026 struct MeshTunnel *t;
5027 struct MeshClient *c;
5028 MESH_TunnelNumber tid;
5030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
5032 /* Sanity check for client registration */
5033 if (NULL == (c = client_get (client)))
5036 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5039 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5041 /* Message size sanity check */
5042 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5045 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5049 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s:%u\n",
5051 GNUNET_i2s (&t_msg->peer), ntohl (t_msg->port));
5052 tid = ntohl (t_msg->tunnel_id);
5053 /* Sanity check for duplicate tunnel IDs */
5054 if (NULL != tunnel_get_by_local_id (c, tid))
5057 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5062 while (NULL != tunnel_get_by_pi (myid, next_tid))
5063 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5064 t = tunnel_new (myid, next_tid, c, tid);
5065 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
5069 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5072 t->port = ntohl (t_msg->port);
5073 tunnel_set_options (t, ntohl (t_msg->opt));
5074 if (GNUNET_YES == t->reliable)
5076 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
5077 t->fwd_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
5079 t->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
5082 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
5083 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
5085 peer_info = peer_get (&t_msg->peer);
5086 peer_info_add_tunnel (peer_info, t);
5087 peer_connect (peer_info, t);
5088 tunnel_reset_timeout (t, GNUNET_YES);
5089 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5095 * Handler for requests of deleting tunnels
5097 * @param cls closure
5098 * @param client identification of the client
5099 * @param message the actual message
5102 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
5103 const struct GNUNET_MessageHeader *message)
5105 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5106 struct MeshClient *c;
5107 struct MeshTunnel *t;
5108 MESH_TunnelNumber tid;
5110 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5111 "Got a DESTROY TUNNEL from client!\n");
5113 /* Sanity check for client registration */
5114 if (NULL == (c = client_get (client)))
5117 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5122 /* Message sanity check */
5123 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5126 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5130 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5132 /* Retrieve tunnel */
5133 tid = ntohl (tunnel_msg->tunnel_id);
5134 t = tunnel_get_by_local_id (c, tid);
5137 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5139 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5143 /* Cleanup after the tunnel */
5144 client_delete_tunnel (c, t);
5145 if (c == t->client && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV <= tid)
5149 else if (c == t->owner && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV > tid)
5151 peer_info_remove_tunnel (peer_get_short (t->dest), t);
5156 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5157 " tunnel %X client %p (%p, %p)\n",
5158 tid, c, t->owner, t->client);
5162 /* The tunnel will be destroyed when the last message is transmitted. */
5163 tunnel_destroy_empty (t);
5165 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5171 * Handler for client traffic
5173 * @param cls closure
5174 * @param client identification of the client
5175 * @param message the actual message
5178 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
5179 const struct GNUNET_MessageHeader *message)
5181 struct GNUNET_MESH_LocalData *data_msg;
5182 struct MeshClient *c;
5183 struct MeshTunnel *t;
5184 struct MeshFlowControl *fc;
5185 MESH_TunnelNumber tid;
5188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5189 "Got data from a client!\n");
5191 /* Sanity check for client registration */
5192 if (NULL == (c = client_get (client)))
5195 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5198 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5200 data_msg = (struct GNUNET_MESH_LocalData *) message;
5202 /* Sanity check for message size */
5203 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
5204 if (size < sizeof (struct GNUNET_MessageHeader))
5207 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5211 /* Tunnel exists? */
5212 tid = ntohl (data_msg->tid);
5213 t = tunnel_get_by_local_id (c, tid);
5217 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5221 /* Is the client in the tunnel? */
5222 if ( !( (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5224 t->owner->handle == client)
5226 (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5228 t->client->handle == client) ) )
5231 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5235 /* Ok, everything is correct, send the message
5236 * (pretend we got it from a mesh peer)
5239 struct GNUNET_MESH_Data *payload;
5240 char cbuf[sizeof(struct GNUNET_MESH_Data) + size];
5242 fc = tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? &t->prev_fc : &t->next_fc;
5243 if (GNUNET_YES == t->reliable)
5245 struct MeshTunnelReliability *rel;
5246 struct MeshReliableMessage *copy;
5248 rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel;
5249 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage)
5250 + sizeof(struct GNUNET_MESH_Data)
5252 copy->mid = rel->mid_sent++;
5253 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->mid);
5254 copy->timestamp = GNUNET_TIME_absolute_get ();
5257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
5258 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
5259 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
5262 GNUNET_TIME_relative_multiply (rel->expected_delay,
5263 MESH_RETRANSMIT_MARGIN);
5265 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
5266 &tunnel_retransmit_message,
5269 payload = (struct GNUNET_MESH_Data *) ©[1];
5270 payload->mid = htonl (copy->mid);
5274 payload = (struct GNUNET_MESH_Data *) cbuf;
5275 payload->mid = htonl (fc->last_pid_recv + 1);
5277 memcpy (&payload[1], &data_msg[1], size);
5278 payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size);
5279 payload->header.type = htons (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ?
5280 GNUNET_MESSAGE_TYPE_MESH_UNICAST :
5281 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5282 GNUNET_PEER_resolve(t->id.oid, &payload->oid);;
5283 payload->tid = htonl (t->id.tid);
5284 payload->ttl = htonl (default_ttl);
5285 payload->pid = htonl (fc->last_pid_recv + 1);
5286 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5287 " calling generic handler...\n");
5288 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5289 handle_mesh_unicast (NULL, &my_full_id, &payload->header);
5291 handle_mesh_to_orig (NULL, &my_full_id, &payload->header);
5293 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
5294 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5301 * Handler for client's ACKs for payload traffic.
5303 * @param cls Closure (unused).
5304 * @param client Identification of the client.
5305 * @param message The actual message.
5308 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5309 const struct GNUNET_MessageHeader *message)
5311 struct GNUNET_MESH_LocalAck *msg;
5312 struct MeshTunnel *t;
5313 struct MeshClient *c;
5314 MESH_TunnelNumber tid;
5316 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5317 /* Sanity check for client registration */
5318 if (NULL == (c = client_get (client)))
5321 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5324 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5326 msg = (struct GNUNET_MESH_LocalAck *) message;
5328 /* Tunnel exists? */
5329 tid = ntohl (msg->tunnel_id);
5330 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5331 t = tunnel_get_by_local_id (c, tid);
5335 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5336 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5337 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5341 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5342 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5344 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5345 t->prev_fc.last_ack_recv++;
5346 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_NO);
5350 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5351 t->next_fc.last_ack_recv++;
5352 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_YES);
5355 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5363 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5365 * @param cls Closure (client handle).
5366 * @param key Key (hashed tunnel ID, unused).
5367 * @param value Tunnel info.
5369 * @return GNUNET_YES, to keep iterating.
5372 monitor_all_tunnels_iterator (void *cls,
5373 const struct GNUNET_HashCode * key,
5376 struct GNUNET_SERVER_Client *client = cls;
5377 struct MeshTunnel *t = value;
5378 struct GNUNET_MESH_LocalMonitor *msg;
5380 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5381 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5382 msg->tunnel_id = htonl (t->id.tid);
5383 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5384 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5385 GNUNET_PEER_resolve (t->dest, &msg->destination);
5387 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5388 "* sending info about tunnel %s [%u]\n",
5389 GNUNET_i2s (&msg->owner), t->id.tid);
5391 GNUNET_SERVER_notification_context_unicast (nc, client,
5392 &msg->header, GNUNET_NO);
5398 * Handler for client's MONITOR request.
5400 * @param cls Closure (unused).
5401 * @param client Identification of the client.
5402 * @param message The actual message.
5405 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5406 const struct GNUNET_MessageHeader *message)
5408 struct MeshClient *c;
5410 /* Sanity check for client registration */
5411 if (NULL == (c = client_get (client)))
5414 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5418 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5419 "Received get tunnels request from client %u\n",
5421 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5422 monitor_all_tunnels_iterator,
5424 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5425 "Get tunnels request from client %u completed\n",
5427 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5432 * Handler for client's MONITOR_TUNNEL request.
5434 * @param cls Closure (unused).
5435 * @param client Identification of the client.
5436 * @param message The actual message.
5439 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5440 const struct GNUNET_MessageHeader *message)
5442 const struct GNUNET_MESH_LocalMonitor *msg;
5443 struct GNUNET_MESH_LocalMonitor *resp;
5444 struct MeshClient *c;
5445 struct MeshTunnel *t;
5447 /* Sanity check for client registration */
5448 if (NULL == (c = client_get (client)))
5451 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5455 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5456 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5457 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5460 ntohl (msg->tunnel_id));
5461 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5464 /* We don't know the tunnel FIXME */
5465 struct GNUNET_MESH_LocalMonitor warn;
5468 GNUNET_SERVER_notification_context_unicast (nc, client,
5471 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5475 /* Initialize context */
5476 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5478 GNUNET_PEER_resolve (t->dest, &resp->destination);
5479 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5480 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5481 &resp->header, GNUNET_NO);
5484 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5485 "Monitor tunnel request from client %u completed\n",
5487 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5492 * Functions to handle messages from clients
5494 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5495 {&handle_local_new_client, NULL,
5496 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5497 {&handle_local_tunnel_create, NULL,
5498 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5499 sizeof (struct GNUNET_MESH_TunnelMessage)},
5500 {&handle_local_tunnel_destroy, NULL,
5501 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5502 sizeof (struct GNUNET_MESH_TunnelMessage)},
5503 {&handle_local_data, NULL,
5504 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
5505 {&handle_local_ack, NULL,
5506 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5507 sizeof (struct GNUNET_MESH_LocalAck)},
5508 {&handle_local_get_tunnels, NULL,
5509 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5510 sizeof (struct GNUNET_MessageHeader)},
5511 {&handle_local_show_tunnel, NULL,
5512 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5513 sizeof (struct GNUNET_MESH_LocalMonitor)},
5519 * Method called whenever a given peer connects.
5521 * @param cls closure
5522 * @param peer peer identity this notification is about
5525 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5527 struct MeshPeerInfo *peer_info;
5528 struct MeshPeerPath *path;
5530 DEBUG_CONN ("Peer connected\n");
5531 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5532 peer_info = peer_get (peer);
5533 if (myid == peer_info->id)
5535 DEBUG_CONN (" (self)\n");
5536 path = path_new (1);
5540 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5541 path = path_new (2);
5542 path->peers[1] = peer_info->id;
5543 GNUNET_PEER_change_rc (peer_info->id, 1);
5544 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5546 path->peers[0] = myid;
5547 GNUNET_PEER_change_rc (myid, 1);
5548 peer_info_add_path (peer_info, path, GNUNET_YES);
5554 * Method called whenever a peer disconnects.
5556 * @param cls closure
5557 * @param peer peer identity this notification is about
5560 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5562 struct MeshPeerInfo *pi;
5563 struct MeshPeerQueue *q;
5564 struct MeshPeerQueue *n;
5566 DEBUG_CONN ("Peer disconnected\n");
5567 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5577 /* TODO try to reroute this traffic instead */
5578 queue_destroy(q, GNUNET_YES);
5581 if (NULL != pi->core_transmit)
5583 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5584 pi->core_transmit = NULL;
5586 peer_info_remove_path (pi, pi->id, myid);
5589 DEBUG_CONN (" (self)\n");
5591 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5597 * Install server (service) handlers and start listening to clients.
5602 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5603 GNUNET_SERVER_connect_notify (server_handle,
5604 &handle_local_client_connect, NULL);
5605 GNUNET_SERVER_disconnect_notify (server_handle,
5606 &handle_local_client_disconnect, NULL);
5607 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5609 clients_head = NULL;
5610 clients_tail = NULL;
5612 GNUNET_SERVER_resume (server_handle);
5617 * To be called on core init/fail.
5619 * @param cls Closure (config)
5620 * @param server handle to the server for this service
5621 * @param identity the public identity of this peer
5624 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5625 const struct GNUNET_PeerIdentity *identity)
5627 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5631 GNUNET_break (core_handle == server);
5632 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5635 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5636 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5638 GNUNET_i2s (identity));
5639 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5641 GNUNET_i2s (&my_full_id));
5642 GNUNET_CORE_disconnect (core_handle);
5643 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5644 NULL, /* Closure passed to MESH functions */
5645 &core_init, /* Call core_init once connected */
5646 &core_connect, /* Handle connects */
5647 &core_disconnect, /* remove peers on disconnects */
5648 NULL, /* Don't notify about all incoming messages */
5649 GNUNET_NO, /* For header only in notification */
5650 NULL, /* Don't notify about all outbound messages */
5651 GNUNET_NO, /* For header-only out notification */
5652 core_handlers); /* Register these handlers */
5661 /******************************************************************************/
5662 /************************ MAIN FUNCTIONS ****************************/
5663 /******************************************************************************/
5666 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5668 * @param cls closure
5669 * @param key current key code
5670 * @param value value in the hash map
5671 * @return GNUNET_YES if we should continue to iterate,
5675 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5677 struct MeshTunnel *t = value;
5684 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5686 * @param cls closure
5687 * @param key current key code
5688 * @param value value in the hash map
5689 * @return GNUNET_YES if we should continue to iterate,
5693 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5695 struct MeshPeerInfo *p = value;
5696 struct MeshPeerQueue *q;
5697 struct MeshPeerQueue *n;
5705 queue_destroy(q, GNUNET_YES);
5709 peer_info_destroy (p);
5715 * Task run during shutdown.
5721 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5723 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5725 if (core_handle != NULL)
5727 GNUNET_CORE_disconnect (core_handle);
5730 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5731 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5732 if (dht_handle != NULL)
5734 GNUNET_DHT_disconnect (dht_handle);
5739 GNUNET_SERVER_notification_context_destroy (nc);
5742 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5744 GNUNET_SCHEDULER_cancel (announce_id_task);
5745 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5752 * Process mesh requests.
5754 * @param cls closure
5755 * @param server the initialized server
5756 * @param c configuration to use
5759 run (void *cls, struct GNUNET_SERVER_Handle *server,
5760 const struct GNUNET_CONFIGURATION_Handle *c)
5763 struct GNUNET_CRYPTO_EccPrivateKey *pk;
5765 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5766 server_handle = server;
5767 GNUNET_SERVER_suspend (server_handle);
5770 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5773 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5775 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5776 "mesh", "peer/privatekey");
5777 GNUNET_SCHEDULER_shutdown ();
5782 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5783 &refresh_path_time))
5785 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5787 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5788 "mesh", "refresh path time");
5789 GNUNET_SCHEDULER_shutdown ();
5794 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5797 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5799 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5800 "mesh", "id announce time");
5801 GNUNET_SCHEDULER_shutdown ();
5806 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5809 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5811 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5812 "mesh", "connect timeout");
5813 GNUNET_SCHEDULER_shutdown ();
5818 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5821 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5823 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5824 "mesh", "max msgs queue");
5825 GNUNET_SCHEDULER_shutdown ();
5830 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5833 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5835 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5836 "mesh", "max tunnels");
5837 GNUNET_SCHEDULER_shutdown ();
5842 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5845 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5847 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5848 "mesh", "default ttl", 64);
5853 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5856 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5857 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5858 "mesh", "max peers", 1000);
5863 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
5870 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5871 "Mesh is running with drop mode enabled. "
5872 "This is NOT a good idea! "
5873 "Remove the DROP_PERCENT option from your configuration.\n");
5877 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5878 &dht_replication_level))
5880 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5882 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5883 "mesh", "dht replication level", 3);
5884 dht_replication_level = 3;
5887 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5888 incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5889 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5890 ports = GNUNET_CONTAINER_multihashmap32_create (32);
5892 dht_handle = GNUNET_DHT_connect (c, 64);
5893 if (NULL == dht_handle)
5897 stats = GNUNET_STATISTICS_create ("mesh", c);
5899 /* Scheduled the task to clean up when shutdown is called */
5900 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5902 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
5903 GNUNET_free (keyfile);
5904 GNUNET_assert (NULL != pk);
5905 my_private_key = pk;
5906 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5907 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5908 &my_full_id.hashPubKey);
5909 myid = GNUNET_PEER_intern (&my_full_id);
5910 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5911 "Mesh for peer [%s] starting\n",
5912 GNUNET_i2s(&my_full_id));
5914 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5915 NULL, /* Closure passed to MESH functions */
5916 &core_init, /* Call core_init once connected */
5917 &core_connect, /* Handle connects */
5918 &core_disconnect, /* remove peers on disconnects */
5919 NULL, /* Don't notify about all incoming messages */
5920 GNUNET_NO, /* For header only in notification */
5921 NULL, /* Don't notify about all outbound messages */
5922 GNUNET_NO, /* For header-only out notification */
5923 core_handlers); /* Register these handlers */
5924 if (NULL == core_handle)
5927 GNUNET_SCHEDULER_shutdown ();
5931 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5932 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5933 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5938 * The main function for the mesh service.
5940 * @param argc number of arguments from the command line
5941 * @param argv command line arguments
5942 * @return 0 ok, 1 on error
5945 main (int argc, char *const *argv)
5950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5951 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5953 ret = (GNUNET_OK == r) ? 0 : 1;
5954 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");