2 This file is part of GNUnet.
3 (C) 2001-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file mesh/gnunet-service-mesh.c
23 * @brief GNUnet MESH service
24 * @author Bartlomiej Polot
27 * - 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 * @brief Queue and pass message to core when possible.
907 * If type is payload (UNICAST, TO_ORIGIN, MULTICAST) checks for queue status
908 * and accounts for it. In case the queue is full, the message is dropped and
911 * Otherwise, message is treated as internal and allowed to go regardless of
914 * @param cls Closure (@c type dependant). It will be used by queue_send to
915 * build the message to be sent if not already prebuilt.
916 * @param type Type of the message, 0 for a raw message.
917 * @param size Size of the message.
918 * @param dst Neighbor to send message to.
919 * @param t Tunnel this message belongs to.
922 queue_add (void *cls, uint16_t type, size_t size,
923 struct MeshPeerInfo *dst, struct MeshTunnel *t);
927 * Free a transmission that was already queued with all resources
928 * associated to the request.
930 * @param queue Queue handler to cancel.
931 * @param clear_cls Is it necessary to free associated cls?
934 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
938 * @brief Get the next transmittable message from the queue.
940 * This will be the head, except in the case of being a data packet
941 * not allowed by the destination peer.
943 * @param peer Destination peer.
945 * @return The next viable MeshPeerQueue element to send to that peer.
946 * NULL when there are no transmittable messages.
948 struct MeshPeerQueue *
949 queue_get_next (const struct MeshPeerInfo *peer);
953 * Core callback to write a queued packet to core buffer
955 * @param cls Closure (peer info).
956 * @param size Number of bytes available in buf.
957 * @param buf Where the to write the message.
959 * @return number of bytes written to buf
962 queue_send (void *cls, size_t size, void *buf);
966 * Dummy function to separate declarations from definitions in function list.
969 __mesh_divider______________________________________________________________();
973 GNUNET_MESH_DEBUG_S2S (enum MeshTunnelState s)
975 static char buf[128];
980 * Uninitialized status, should never appear in operation.
982 case MESH_TUNNEL_NEW: return "MESH_TUNNEL_NEW";
985 * Path to the peer not known yet
987 case MESH_TUNNEL_SEARCHING: return "MESH_TUNNEL_SEARCHING";
990 * Request sent, not yet answered.
992 case MESH_TUNNEL_WAITING: return "MESH_TUNNEL_WAITING";
995 * Peer connected and ready to accept data
997 case MESH_TUNNEL_READY: return "MESH_TUNNEL_READY";
1000 * Peer connected previosly but not responding
1002 case MESH_TUNNEL_RECONNECTING: return "MESH_TUNNEL_RECONNECTING";
1005 sprintf (buf, "%u (UNKNOWN STATE)", s);
1011 /******************************************************************************/
1012 /************************ PERIODIC FUNCTIONS ****************************/
1013 /******************************************************************************/
1016 * Periodically announce self id in the DHT
1018 * @param cls closure
1019 * @param tc task context
1022 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1024 struct PBlock block;
1026 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1028 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1032 * - Set data expiration in function of X
1033 * - Adapt X to churn
1035 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1037 block.id = my_full_id;
1038 GNUNET_DHT_put (dht_handle, /* DHT handle */
1039 &my_full_id.hashPubKey, /* Key to use */
1040 dht_replication_level, /* Replication level */
1041 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1042 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1043 sizeof (block), /* Size of the data */
1044 (const char *) &block, /* Data itself */
1045 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1046 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1047 NULL, /* Continuation */
1048 NULL); /* Continuation closure */
1050 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1054 /******************************************************************************/
1055 /****************** GENERAL HELPER FUNCTIONS ************************/
1056 /******************************************************************************/
1060 * Check if client has registered with the service and has not disconnected
1062 * @param client the client to check
1064 * @return non-NULL if client exists in the global DLL
1066 static struct MeshClient *
1067 client_get (struct GNUNET_SERVER_Client *client)
1069 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
1074 * Deletes a tunnel from a client (either owner or destination). To be used on
1077 * @param c Client whose tunnel to delete.
1078 * @param t Tunnel which should be deleted.
1081 client_delete_tunnel (struct MeshClient *c, struct MeshTunnel *t)
1085 GNUNET_assert (GNUNET_YES ==
1086 GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels,
1092 GNUNET_assert (GNUNET_YES ==
1093 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
1101 * Notify the appropriate client that a new incoming tunnel was created.
1103 * @param t Tunnel that was created.
1106 send_local_tunnel_create (struct MeshTunnel *t)
1108 struct GNUNET_MESH_TunnelMessage msg;
1110 if (NULL == t->client)
1112 msg.header.size = htons (sizeof (msg));
1113 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1114 msg.tunnel_id = htonl (t->local_tid_dest);
1115 msg.port = htonl (t->port);
1117 msg.opt |= GNUNET_YES == t->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0;
1118 msg.opt |= GNUNET_YES == t->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0;
1119 msg.opt = htonl (msg.opt);
1120 GNUNET_PEER_resolve (t->id.oid, &msg.peer);
1121 GNUNET_SERVER_notification_context_unicast (nc, t->client->handle,
1122 &msg.header, GNUNET_NO);
1127 * Notify a client that the incoming tunnel is no longer valid.
1129 * @param t Tunnel that is destroyed.
1130 * @param fwd Forward notification (owner->dest)?
1133 send_local_tunnel_destroy (struct MeshTunnel *t, int fwd)
1135 struct GNUNET_MESH_TunnelMessage msg;
1136 struct MeshClient *c;
1138 c = fwd ? t->client : t->owner;
1144 msg.header.size = htons (sizeof (msg));
1145 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1146 msg.tunnel_id = htonl (fwd ? t->local_tid_dest : t->local_tid);
1147 msg.port = htonl (0);
1148 memset (&msg.peer, 0, sizeof (msg.peer));
1149 msg.opt = htonl (0);
1150 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1151 &msg.header, GNUNET_NO);
1156 * Build a local ACK message and send it to a local client.
1158 * @param t Tunnel on which to send the ACK.
1159 * @param c Client to whom send the ACK.
1160 * @param is_fwd Set to GNUNET_YES for FWD ACK (dest->owner)
1163 send_local_ack (struct MeshTunnel *t,
1164 struct MeshClient *c,
1167 struct GNUNET_MESH_LocalAck msg;
1169 msg.header.size = htons (sizeof (msg));
1170 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1171 msg.tunnel_id = htonl (is_fwd ? t->local_tid : t->local_tid_dest);
1172 GNUNET_SERVER_notification_context_unicast (nc,
1181 * Sends an already built message to a peer, properly registrating
1182 * all used resources.
1184 * @param message Message to send. Function makes a copy of it.
1185 * @param peer Short ID of the neighbor whom to send the message.
1186 * @param t Tunnel on which this message is transmitted.
1189 send_prebuilt_message (const struct GNUNET_MessageHeader *message,
1190 GNUNET_PEER_Id peer,
1191 struct MeshTunnel *t)
1193 struct GNUNET_PeerIdentity id;
1194 struct MeshPeerInfo *neighbor;
1195 struct MeshPeerPath *p;
1200 // GNUNET_TRANSPORT_try_connect(); FIXME use?
1205 size = ntohs (message->size);
1206 data = GNUNET_malloc (size);
1207 memcpy (data, message, size);
1208 type = ntohs(message->type);
1209 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type ||
1210 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
1212 struct GNUNET_MESH_Data *u;
1214 u = (struct GNUNET_MESH_Data *) data;
1215 u->ttl = htonl (ntohl (u->ttl) - 1);
1217 GNUNET_PEER_resolve (peer, &id);
1218 neighbor = peer_get (&id);
1219 for (p = neighbor->path_head; NULL != p; p = p->next)
1229 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1230 " %s IS NOT DIRECTLY CONNECTED\n",
1232 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1235 for (p = neighbor->path_head; NULL != p; p = p->next)
1237 struct GNUNET_PeerIdentity debug_id;
1240 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1241 " path with %u hops through:\n",
1243 for (i = 0; i < p->length; i++)
1245 GNUNET_PEER_resolve(p->peers[i], &debug_id);
1246 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1248 i, GNUNET_i2s(&debug_id));
1253 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1254 " no direct connection to %s\n",
1259 if (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK == type)
1270 * Sends a CREATE PATH message for a path to a peer, properly registrating
1271 * all used resources.
1273 * @param t Tunnel for which the path is created.
1276 send_path_create (struct MeshTunnel *t)
1278 struct MeshPeerInfo *neighbor;
1280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send create path\n");
1281 neighbor = peer_get_short (t->next_hop);
1283 GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE,
1284 sizeof (struct GNUNET_MESH_CreateTunnel) +
1285 (t->path->length * sizeof (struct GNUNET_PeerIdentity)),
1288 tunnel_change_state (t, MESH_TUNNEL_WAITING);
1293 * Sends a PATH ACK message in reponse to a received PATH_CREATE directed to us.
1295 * @param t Tunnel which to confirm.
1298 send_path_ack (struct MeshTunnel *t)
1300 struct MeshPeerInfo *neighbor;
1302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send path ack\n");
1303 neighbor = peer_get_short (t->prev_hop);
1305 GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
1306 sizeof (struct GNUNET_MESH_PathACK),
1309 tunnel_change_state (t, MESH_TUNNEL_WAITING);
1314 * Build an ACK message and queue it to send to the given peer.
1316 * @param t Tunnel on which to send the ACK.
1317 * @param peer Peer to whom send the ACK.
1318 * @param ack Value of the ACK.
1321 send_ack (struct MeshTunnel *t, GNUNET_PEER_Id peer, uint32_t ack)
1323 struct GNUNET_MESH_ACK msg;
1325 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1326 msg.header.size = htons (sizeof (msg));
1327 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
1328 msg.pid = htonl (ack);
1329 msg.tid = htonl (t->id.tid);
1331 send_prebuilt_message (&msg.header, peer, t);
1336 * Core callback to write a pre-constructed data packet to core buffer
1338 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
1339 * @param size Number of bytes available in buf.
1340 * @param buf Where the to write the message.
1342 * @return number of bytes written to buf
1345 send_core_data_raw (void *cls, size_t size, void *buf)
1347 struct GNUNET_MessageHeader *msg = cls;
1350 GNUNET_assert (NULL != msg);
1351 total_size = ntohs (msg->size);
1353 if (total_size > size)
1358 memcpy (buf, msg, total_size);
1365 * Function to send a create path packet to a peer.
1367 * @param cls closure
1368 * @param size number of bytes available in buf
1369 * @param buf where the callee should write the message
1370 * @return number of bytes written to buf
1373 send_core_path_create (void *cls, size_t size, void *buf)
1375 struct MeshTunnel *t = cls;
1376 struct GNUNET_MESH_CreateTunnel *msg;
1377 struct GNUNET_PeerIdentity *peer_ptr;
1378 struct MeshPeerPath *p = t->path;
1383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATE PATH sending...\n");
1385 sizeof (struct GNUNET_MESH_CreateTunnel) +
1386 p->length * sizeof (struct GNUNET_PeerIdentity);
1388 if (size < size_needed || NULL == buf)
1393 msg = (struct GNUNET_MESH_CreateTunnel *) buf;
1394 msg->header.size = htons (size_needed);
1395 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE);
1396 msg->tid = ntohl (t->id.tid);
1399 if (GNUNET_YES == t->nobuffer)
1400 opt |= GNUNET_MESH_OPTION_NOBUFFER;
1401 if (GNUNET_YES == t->reliable)
1402 opt |= GNUNET_MESH_OPTION_RELIABLE;
1403 msg->opt = htonl (opt);
1404 msg->port = htonl (t->port);
1406 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
1407 for (i = 0; i < p->length; i++)
1409 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
1412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1413 "CREATE PATH (%u bytes long) sent!\n", size_needed);
1419 * Creates a path ack message in buf and frees all unused resources.
1421 * @param cls closure (MeshTransmissionDescriptor)
1422 * @param size number of bytes available in buf
1423 * @param buf where the callee should write the message
1424 * @return number of bytes written to buf
1427 send_core_path_ack (void *cls, size_t size, void *buf)
1429 struct MeshTunnel *t = cls;
1430 struct GNUNET_MESH_PathACK *msg = buf;
1432 GNUNET_assert (NULL != t);
1433 if (sizeof (struct GNUNET_MESH_PathACK) > size)
1438 t->prev_fc.last_ack_sent = t->nobuffer ? 0 : t->queue_max - 1;
1439 msg->header.size = htons (sizeof (struct GNUNET_MESH_PathACK));
1440 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_ACK);
1441 GNUNET_PEER_resolve (t->id.oid, &msg->oid);
1442 msg->tid = htonl (t->id.tid);
1443 msg->peer_id = my_full_id;
1444 msg->ack = htonl (t->prev_fc.last_ack_sent);
1446 /* TODO add signature */
1448 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "PATH ACK sent!\n");
1449 return sizeof (struct GNUNET_MESH_PathACK);
1454 * Iterator over all the peers to remove the oldest not-used entry.
1456 * @param cls Closure (unsued).
1457 * @param key ID of the peer.
1458 * @param value Peer_Info of the peer.
1463 peer_info_timeout (void *cls,
1464 const struct GNUNET_HashCode *key,
1471 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1472 * and insert it in the appropriate structures if the peer is not known yet.
1474 * @param peer Full identity of the peer.
1476 * @return Existing or newly created peer info.
1478 static struct MeshPeerInfo *
1479 peer_get (const struct GNUNET_PeerIdentity *peer)
1481 struct MeshPeerInfo *peer_info;
1483 peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
1484 if (NULL == peer_info)
1487 (struct MeshPeerInfo *) GNUNET_malloc (sizeof (struct MeshPeerInfo));
1488 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
1490 GNUNET_CONTAINER_multihashmap_iterate (peers,
1494 GNUNET_CONTAINER_multihashmap_put (peers, &peer->hashPubKey, peer_info,
1495 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
1496 peer_info->id = GNUNET_PEER_intern (peer);
1498 peer_info->last_contact = GNUNET_TIME_absolute_get();
1505 * Retrieve the MeshPeerInfo stucture associated with the peer, create one
1506 * and insert it in the appropriate structures if the peer is not known yet.
1508 * @param peer Short identity of the peer.
1510 * @return Existing or newly created peer info.
1512 static struct MeshPeerInfo *
1513 peer_get_short (const GNUNET_PEER_Id peer)
1515 struct GNUNET_PeerIdentity id;
1517 GNUNET_PEER_resolve (peer, &id);
1518 return peer_get (&id);
1523 * Select which PID to POLL for, to compensate for lost messages.
1525 * @param pi Peer we want to poll.
1526 * @param t Tunnel about which we want to poll.
1528 * @return PID to use, either last sent or first_in_queue - 1
1531 peer_get_first_payload_pid (struct MeshPeerInfo *pi, struct MeshTunnel *t)
1533 struct MeshPeerQueue *q;
1536 type = pi->id == t->next_hop ? GNUNET_MESSAGE_TYPE_MESH_UNICAST :
1537 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN;
1539 for (q = pi->queue_head; NULL != q; q = q->next)
1541 if (q->type == type && q->tunnel == t)
1543 struct GNUNET_MESH_Data *msg = q->cls;
1545 /* Pretend that the last one sent was the previous to this */
1546 return ntohl (msg->pid) - 1;
1550 /* No data in queue, use last sent */
1552 struct MeshFlowControl *fc;
1554 fc = pi->id == t->next_hop ? &t->next_fc : &t->prev_fc;
1555 return fc->last_pid_sent;
1561 * Choose the best path towards a peer considering the tunnel properties.
1563 * @param peer The destination peer.
1564 * @param t The tunnel the path is for.
1566 * @return Best current known path towards the peer, if any.
1568 static struct MeshPeerPath *
1569 peer_get_best_path (const struct MeshPeerInfo *peer, const struct MeshTunnel *t)
1571 struct MeshPeerPath *best_p;
1572 struct MeshPeerPath *p;
1573 unsigned int best_cost;
1576 best_p = p = peer->path_head;
1577 best_cost = cost = p->length;
1580 if ((cost = p->length) < best_cost)
1592 * Try to establish a new connection to this peer in the given tunnel.
1593 * If the peer doesn't have any path to it yet, try to get one.
1594 * If the peer already has some path, send a CREATE PATH towards it.
1596 * @param peer PeerInfo of the peer.
1597 * @param t Tunnel for which to create the path, if possible.
1600 peer_connect (struct MeshPeerInfo *peer, struct MeshTunnel *t)
1602 struct MeshPeerPath *p;
1604 if (NULL != peer->path_head)
1606 p = peer_get_best_path (peer, t);
1607 tunnel_use_path (t, p);
1608 send_path_create (t);
1610 else if (NULL == peer->dhtget)
1612 struct GNUNET_PeerIdentity id;
1614 GNUNET_PEER_resolve (peer->id, &id);
1615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1616 " Starting DHT GET for peer %s\n", GNUNET_i2s (&id));
1617 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
1618 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
1619 &id.hashPubKey, /* key to search */
1620 dht_replication_level, /* replication level */
1621 GNUNET_DHT_RO_RECORD_ROUTE |
1622 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
1624 0, /* xquery bits */
1625 &dht_get_id_handler, peer);
1626 tunnel_change_state (t, MESH_TUNNEL_SEARCHING);
1630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1631 "There is no path but the DHT GET is already started.\n");
1637 * @brief Re-initiate traffic to this peer if necessary.
1639 * Check if there is traffic queued towards this peer
1640 * and the core transmit handle is NULL (traffic was stalled).
1641 * If so, call core tmt rdy.
1643 * @param peer_id Short ID of peer to which initiate traffic.
1646 peer_unlock_queue (GNUNET_PEER_Id peer_id)
1648 struct MeshPeerInfo *peer;
1649 struct MeshPeerQueue *q;
1652 peer = peer_get_short (peer_id);
1653 if (NULL != peer->core_transmit)
1656 q = queue_get_next (peer);
1661 peer->core_transmit =
1662 GNUNET_CORE_notify_transmit_ready (core_handle,
1665 GNUNET_TIME_UNIT_FOREVER_REL,
1666 GNUNET_PEER_resolve2 (peer->id),
1674 * Cancel all transmissions towards a neighbor that belong to a certain tunnel.
1676 * @param t Tunnel which to cancel.
1677 * @param neighbor Short ID of the neighbor to whom cancel the transmissions.
1680 peer_cancel_queues (GNUNET_PEER_Id neighbor, struct MeshTunnel *t)
1682 struct MeshPeerInfo *peer_info;
1683 struct MeshPeerQueue *pq;
1684 struct MeshPeerQueue *next;
1687 return; /* Was local peer, 0'ed in tunnel_destroy_iterator */
1688 peer_info = peer_get_short (neighbor);
1689 for (pq = peer_info->queue_head; NULL != pq; pq = next)
1692 if (pq->tunnel == t)
1694 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == pq->type ||
1695 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == pq->type)
1697 /* Should have been removed on destroy children */
1700 queue_destroy (pq, GNUNET_YES);
1703 if (NULL == peer_info->queue_head && NULL != peer_info->core_transmit)
1705 GNUNET_CORE_notify_transmit_ready_cancel(peer_info->core_transmit);
1706 peer_info->core_transmit = NULL;
1712 * Destroy the peer_info and free any allocated resources linked to it
1714 * @param pi The peer_info to destroy.
1716 * @return GNUNET_OK on success
1719 peer_info_destroy (struct MeshPeerInfo *pi)
1721 struct GNUNET_PeerIdentity id;
1722 struct MeshPeerPath *p;
1723 struct MeshPeerPath *nextp;
1726 GNUNET_PEER_resolve (pi->id, &id);
1727 GNUNET_PEER_change_rc (pi->id, -1);
1730 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, pi))
1733 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
1734 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
1736 if (NULL != pi->dhtget)
1738 GNUNET_DHT_get_stop (pi->dhtget);
1744 GNUNET_CONTAINER_DLL_remove (pi->path_head, pi->path_tail, p);
1748 for (i = 0; i < pi->ntunnels; i++)
1749 tunnel_destroy_empty (pi->tunnels[i]);
1750 GNUNET_array_grow (pi->tunnels, pi->ntunnels, 0);
1757 * Remove all paths that rely on a direct connection between p1 and p2
1758 * from the peer itself and notify all tunnels about it.
1760 * @param peer PeerInfo of affected peer.
1761 * @param p1 GNUNET_PEER_Id of one peer.
1762 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
1765 * TODO: optimize (see below)
1768 peer_info_remove_path (struct MeshPeerInfo *peer, GNUNET_PEER_Id p1,
1771 struct MeshPeerPath *p;
1772 struct MeshPeerPath *next;
1773 struct MeshPeerInfo *peer_d;
1775 unsigned int destroyed;
1778 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
1780 for (p = peer->path_head; NULL != p; p = next)
1783 for (i = 0; i < (p->length - 1); i++)
1785 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
1786 (p->peers[i] == p2 && p->peers[i + 1] == p1))
1788 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
1798 for (i = 0; i < peer->ntunnels; i++)
1800 d = tunnel_notify_connection_broken (peer->tunnels[i], p1, p2);
1804 peer_d = peer_get_short (d);
1805 next = peer_get_best_path (peer_d, peer->tunnels[i]);
1806 tunnel_use_path (peer->tunnels[i], next);
1807 peer_connect (peer_d, peer->tunnels[i]);
1809 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
1814 * Add the path to the peer and update the path used to reach it in case this
1817 * @param peer_info Destination peer to add the path to.
1818 * @param path New path to add. Last peer must be the peer in arg 1.
1819 * Path will be either used of freed if already known.
1820 * @param trusted Do we trust that this path is real?
1823 peer_info_add_path (struct MeshPeerInfo *peer_info, struct MeshPeerPath *path,
1826 struct MeshPeerPath *aux;
1830 if ((NULL == peer_info) || (NULL == path))
1833 path_destroy (path);
1836 if (path->peers[path->length - 1] != peer_info->id)
1839 path_destroy (path);
1842 if (2 >= path->length && GNUNET_NO == trusted)
1844 /* Only allow CORE to tell us about direct paths */
1845 path_destroy (path);
1848 for (l = 1; l < path->length; l++)
1850 if (path->peers[l] == myid)
1852 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
1853 for (l2 = 0; l2 < path->length - l; l2++)
1855 path->peers[l2] = path->peers[l + l2];
1860 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
1865 struct GNUNET_PeerIdentity id;
1867 GNUNET_PEER_resolve (peer_info->id, &id);
1868 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
1869 path->length, GNUNET_i2s (&id));
1872 l = path_get_length (path);
1875 path_destroy (path);
1879 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
1880 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
1882 l2 = path_get_length (aux);
1885 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
1886 peer_info->path_tail, aux, path);
1891 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
1893 path_destroy (path);
1898 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
1905 * Add the path to the origin peer and update the path used to reach it in case
1906 * this is the shortest.
1907 * The path is given in peer_info -> destination, therefore we turn the path
1908 * upside down first.
1910 * @param peer_info Peer to add the path to, being the origin of the path.
1911 * @param path New path to add after being inversed.
1912 * Path will be either used or freed.
1913 * @param trusted Do we trust that this path is real?
1916 peer_info_add_path_to_origin (struct MeshPeerInfo *peer_info,
1917 struct MeshPeerPath *path, int trusted)
1920 peer_info_add_path (peer_info, path, trusted);
1925 * Add a tunnel to the list of tunnels a peer participates in.
1926 * Update the tunnel's destination.
1928 * @param p Peer to add to.
1929 * @param t Tunnel to add.
1932 peer_info_add_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1936 GNUNET_break (t->dest == p->id);
1940 GNUNET_PEER_change_rc (t->dest, 1);
1941 GNUNET_array_append (p->tunnels, p->ntunnels, t);
1946 * Remove a tunnel from the list of tunnels a peer participates in.
1947 * Free the tunnel's destination.
1949 * @param p Peer to clean.
1950 * @param t Tunnel to remove.
1953 peer_info_remove_tunnel (struct MeshPeerInfo *p, struct MeshTunnel *t)
1957 if (t->dest == p->id)
1959 GNUNET_PEER_change_rc (t->dest, -1);
1962 for (i = 0; i < p->ntunnels; i++)
1964 if (p->tunnels[i] == t)
1966 p->tunnels[i] = p->tunnels[p->ntunnels - 1];
1967 GNUNET_array_grow (p->tunnels, p->ntunnels, p->ntunnels - 1);
1975 * Function called if the connection to the peer has been stalled for a while,
1976 * possibly due to a missed ACK. Poll the peer about its ACK status.
1978 * @param cls Closure (poll ctx).
1979 * @param tc TaskContext.
1982 tunnel_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1984 struct MeshFlowControl *fc = cls;
1985 struct GNUNET_MESH_Poll msg;
1986 struct MeshTunnel *t = fc->t;
1987 GNUNET_PEER_Id peer;
1989 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
1990 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1995 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n");
1997 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
1999 if (fc == &t->prev_fc)
2001 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** prev peer!\n");
2004 else if (fc == &t->next_fc)
2006 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** next peer!\n");
2014 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
2015 msg.header.size = htons (sizeof (msg));
2016 msg.tid = htonl (t->id.tid);
2017 msg.pid = htonl (peer_get_first_payload_pid (peer_get_short (peer), t));
2018 send_prebuilt_message (&msg.header, peer, t);
2019 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
2020 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2026 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2027 * to obtain a local peer -> destination path and interning the peer ids.
2029 * @return Newly allocated and created path
2031 static struct MeshPeerPath *
2032 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2033 unsigned int get_path_length,
2034 const struct GNUNET_PeerIdentity *put_path,
2035 unsigned int put_path_length)
2037 struct MeshPeerPath *p;
2043 GNUNET_PEER_change_rc (myid, 1);
2044 i = get_path_length;
2045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2046 for (i--; i >= 0; i--)
2048 id = GNUNET_PEER_intern (&get_path[i]);
2049 if (p->length > 0 && id == p->peers[p->length - 1])
2051 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2052 GNUNET_PEER_change_rc (id, -1);
2056 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2057 GNUNET_i2s (&get_path[i]));
2059 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2060 p->peers[p->length - 1] = id;
2063 i = put_path_length;
2064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2065 for (i--; i >= 0; i--)
2067 id = GNUNET_PEER_intern (&put_path[i]);
2070 /* PUT path went through us, so discard the path up until now and start
2071 * from here to get a much shorter (and loop-free) path.
2076 if (p->length > 0 && id == p->peers[p->length - 1])
2078 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2079 GNUNET_PEER_change_rc (id, -1);
2083 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2084 GNUNET_i2s (&put_path[i]));
2086 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2087 p->peers[p->length - 1] = id;
2091 if (get_path_length > 0)
2092 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2093 GNUNET_i2s (&get_path[0]));
2094 if (put_path_length > 0)
2095 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2096 GNUNET_i2s (&put_path[0]));
2097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2099 for (i = 0; i < p->length; i++)
2101 struct GNUNET_PeerIdentity peer_id;
2103 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2104 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2105 GNUNET_i2s (&peer_id));
2113 * Adds a path to the peer_infos of all the peers in the path
2115 * @param p Path to process.
2116 * @param confirmed Whether we know if the path works or not.
2119 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2123 /* TODO: invert and add */
2124 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2125 for (i++; i < p->length; i++)
2127 struct MeshPeerInfo *aux;
2128 struct MeshPeerPath *copy;
2130 aux = peer_get_short (p->peers[i]);
2131 copy = path_duplicate (p);
2132 copy->length = i + 1;
2133 peer_info_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
2139 * Search for a tunnel among the incoming tunnels
2141 * @param tid the local id of the tunnel
2143 * @return tunnel handler, NULL if doesn't exist
2145 static struct MeshTunnel *
2146 tunnel_get_incoming (MESH_TunnelNumber tid)
2148 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV);
2149 return GNUNET_CONTAINER_multihashmap32_get (incoming_tunnels, tid);
2154 * Search for a tunnel among the tunnels for a client
2156 * @param c the client whose tunnels to search in
2157 * @param tid the local id of the tunnel
2159 * @return tunnel handler, NULL if doesn't exist
2161 static struct MeshTunnel *
2162 tunnel_get_by_local_id (struct MeshClient *c, MESH_TunnelNumber tid)
2164 if (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
2166 return tunnel_get_incoming (tid);
2170 GNUNET_assert (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_CLI);
2171 return GNUNET_CONTAINER_multihashmap32_get (c->own_tunnels, tid);
2177 * Search for a tunnel by global ID using PEER_ID
2179 * @param pi owner of the tunnel
2180 * @param tid global tunnel number
2182 * @return tunnel handler, NULL if doesn't exist
2184 static struct MeshTunnel *
2185 tunnel_get_by_pi (GNUNET_PEER_Id pi, MESH_TunnelNumber tid)
2187 struct MESH_TunnelID id;
2188 struct GNUNET_HashCode hash;
2193 GNUNET_CRYPTO_hash (&id, sizeof (struct MESH_TunnelID), &hash);
2194 return GNUNET_CONTAINER_multihashmap_get (tunnels, &hash);
2199 * Search for a tunnel by global ID using full PeerIdentities
2201 * @param oid owner of the tunnel
2202 * @param tid global tunnel number
2204 * @return tunnel handler, NULL if doesn't exist
2206 static struct MeshTunnel *
2207 tunnel_get (const struct GNUNET_PeerIdentity *oid, MESH_TunnelNumber tid)
2209 return tunnel_get_by_pi (GNUNET_PEER_search (oid), tid);
2214 * Change the tunnel state.
2216 * @param t Tunnel whose ttate to change.
2217 * @param state New state.
2220 tunnel_change_state (struct MeshTunnel *t, enum MeshTunnelState state)
2222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2223 "Tunnel %s[%X] state was %s\n",
2224 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid,
2225 GNUNET_MESH_DEBUG_S2S (t->state));
2226 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2227 "Tunnel %s[%X] state is now %s\n",
2228 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid,
2229 GNUNET_MESH_DEBUG_S2S (state));
2236 * Add a client to a tunnel, initializing all needed data structures.
2238 * @param t Tunnel to which add the client.
2239 * @param c Client which to add to the tunnel.
2242 tunnel_add_client (struct MeshTunnel *t, struct MeshClient *c)
2244 if (NULL != t->client)
2250 GNUNET_CONTAINER_multihashmap32_put (c->incoming_tunnels,
2251 t->local_tid_dest, t,
2252 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2258 GNUNET_CONTAINER_multihashmap32_put (incoming_tunnels,
2259 t->local_tid_dest, t,
2260 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
2270 tunnel_use_path (struct MeshTunnel *t, struct MeshPeerPath *p)
2272 unsigned int own_pos;
2274 for (own_pos = 0; own_pos < p->length; own_pos++)
2276 if (p->peers[own_pos] == myid)
2279 if (own_pos > p->length - 1)
2285 if (own_pos < p->length - 1)
2286 t->next_hop = p->peers[own_pos + 1];
2288 t->next_hop = p->peers[own_pos];
2289 GNUNET_PEER_change_rc (t->next_hop, 1);
2291 t->prev_hop = p->peers[own_pos - 1];
2293 t->prev_hop = p->peers[0];
2294 GNUNET_PEER_change_rc (t->prev_hop, 1);
2296 if (NULL != t->path)
2297 path_destroy (t->path);
2298 t->path = path_duplicate (p);
2301 if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task)
2302 GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task);
2303 t->fwd_maintenance_task =
2304 GNUNET_SCHEDULER_add_delayed (refresh_path_time,
2305 &tunnel_fwd_keepalive, t);
2311 * Notifies a tunnel that a connection has broken that affects at least
2312 * some of its peers. Sends a notification towards the root of the tree.
2313 * In case the peer is the owner of the tree, notifies the client that owns
2314 * the tunnel and tries to reconnect.
2316 * @param t Tunnel affected.
2317 * @param p1 Peer that got disconnected from p2.
2318 * @param p2 Peer that got disconnected from p1.
2320 * @return Short ID of the peer disconnected (either p1 or p2).
2321 * 0 if the tunnel remained unaffected.
2323 static GNUNET_PEER_Id
2324 tunnel_notify_connection_broken (struct MeshTunnel *t, GNUNET_PEER_Id p1,
2327 // if (myid != p1 && myid != p2) FIXME
2332 // if (tree_get_predecessor (t->tree) != 0)
2334 // /* We are the peer still connected, notify owner of the disconnection. */
2335 // struct GNUNET_MESH_PathBroken msg;
2336 // struct GNUNET_PeerIdentity neighbor;
2338 // msg.header.size = htons (sizeof (msg));
2339 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
2340 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2341 // msg.tid = htonl (t->id.tid);
2342 // msg.peer1 = my_full_id;
2343 // GNUNET_PEER_resolve (pid, &msg.peer2);
2344 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
2345 // send_prebuilt_message (&msg.header, &neighbor, t);
2352 * Send an end-to-end FWD ACK message for the most recent in-sequence payload.
2354 * @param t Tunnel this is about.
2355 * @param fwd Is for FWD traffic? (ACK dest->owner)
2358 tunnel_send_data_ack (struct MeshTunnel *t, int fwd)
2360 struct GNUNET_MESH_DataACK msg;
2361 struct MeshTunnelReliability *rel;
2362 struct MeshReliableMessage *copy;
2367 rel = fwd ? t->bck_rel : t->fwd_rel;
2368 hop = fwd ? t->prev_hop : t->next_hop;
2369 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2370 "send_data_ack for %u\n",
2373 if (GNUNET_NO == t->reliable)
2375 GNUNET_break_op (0);
2378 msg.header.type = htons (fwd ? GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK :
2379 GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK);
2380 msg.header.size = htons (sizeof (msg));
2381 msg.tid = htonl (t->id.tid);
2382 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2383 msg.mid = htonl (rel->mid_recv - 1);
2385 for (copy = rel->head_recv; NULL != copy; copy = copy->next)
2387 delta = copy->mid - rel->mid_recv;
2390 mask = 0x1LL << delta;
2391 msg.futures |= mask;
2392 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2393 " setting bit for %u (delta %u) (%llX) -> %llX\n",
2394 copy->mid, delta, mask, msg.futures);
2396 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " final futures %llX\n", msg.futures);
2398 send_prebuilt_message (&msg.header, hop, t);
2399 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_data_ack END\n");
2404 * Send an ACK informing the predecessor about the available buffer space.
2405 * In case there is no predecessor, inform the owning client.
2406 * If buffering is off, send only on behalf of children or self if endpoint.
2407 * If buffering is on, send when sent to children and buffer space is free.
2408 * Note that although the name is fwd_ack, the FWD mean forward *traffic*,
2409 * the ACK itself goes "back" (towards root).
2411 * @param t Tunnel on which to send the ACK.
2412 * @param type Type of message that triggered the ACK transmission.
2413 * @param fwd Is this FWD ACK? (Going dest->owner)
2416 tunnel_send_ack (struct MeshTunnel *t, uint16_t type, int fwd)
2418 struct MeshTunnelReliability *rel;
2419 struct MeshFlowControl *next_fc;
2420 struct MeshFlowControl *prev_fc;
2421 struct MeshClient *c;
2422 struct MeshClient *o;
2428 rel = fwd ? t->fwd_rel : t->bck_rel;
2429 c = fwd ? t->client : t->owner;
2430 o = fwd ? t->owner : t->client;
2431 next_fc = fwd ? &t->next_fc : &t->prev_fc;
2432 prev_fc = fwd ? &t->prev_fc : &t->next_fc;
2433 hop = fwd ? t->prev_hop : t->next_hop;
2437 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
2438 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
2439 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2441 GNUNET_MESH_DEBUG_M2S (type));
2442 if (GNUNET_YES == t->nobuffer)
2444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, nobuffer\n");
2447 if (GNUNET_YES == t->reliable && NULL != c)
2448 tunnel_send_data_ack (t, fwd);
2450 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
2451 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
2452 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2453 case GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK:
2455 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2456 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
2457 t->force_ack = GNUNET_YES;
2463 /* Check if we need to transmit the ACK */
2465 prev_fc->last_ack_sent - prev_fc->last_pid_recv > 3 &&
2466 GNUNET_NO == t->force_ack)
2468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer free\n");
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470 " last pid recv: %u, last ack sent: %u\n",
2471 prev_fc->last_pid_recv, prev_fc->last_ack_sent);
2475 /* Ok, ACK might be necessary, what PID to ACK? */
2476 delta = t->queue_max - next_fc->queue_n;
2477 if (NULL != o && GNUNET_YES == t->reliable && NULL != rel->head_sent)
2478 delta_mid = rel->mid_sent - rel->head_sent->mid;
2481 if (0 > delta || (GNUNET_YES == t->reliable &&
2483 (10 < rel->n_sent || 64 <= delta_mid)))
2485 if (NULL != o && delta > 1)
2487 ack = prev_fc->last_pid_recv + delta;
2488 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
2489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2490 " last pid %u, last ack %u, qmax %u, q %u\n",
2491 prev_fc->last_pid_recv, prev_fc->last_ack_sent,
2492 t->queue_max, next_fc->queue_n);
2493 if (ack == prev_fc->last_ack_sent && GNUNET_NO == t->force_ack)
2495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
2499 prev_fc->last_ack_sent = ack;
2501 send_local_ack (t, o, fwd);
2503 send_ack (t, hop, ack);
2505 GNUNET_break (GNUNET_YES == t->destroy);
2506 t->force_ack = GNUNET_NO;
2511 * Modify the mesh message TID from global to local and send to client.
2513 * @param t Tunnel on which to send the message.
2514 * @param msg Message to modify and send.
2515 * @param c Client to send to.
2516 * @param tid Tunnel ID to use (c can be both owner and client).
2519 tunnel_send_client_to_tid (struct MeshTunnel *t,
2520 const struct GNUNET_MESH_Data *msg,
2521 struct MeshClient *c, MESH_TunnelNumber tid)
2523 struct GNUNET_MESH_LocalData *copy;
2524 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
2525 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
2527 if (size < sizeof (struct GNUNET_MessageHeader))
2529 GNUNET_break_op (0);
2537 copy = (struct GNUNET_MESH_LocalData *) cbuf;
2538 memcpy (©[1], &msg[1], size);
2539 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
2540 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
2541 copy->tid = htonl (tid);
2542 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
2543 ©->header, GNUNET_NO);
2547 * Modify the unicast message TID from global to local and send to client.
2549 * @param t Tunnel on which to send the message.
2550 * @param msg Message to modify and send.
2551 * @param fwd Forward?
2554 tunnel_send_client_data (struct MeshTunnel *t,
2555 const struct GNUNET_MESH_Data *msg,
2559 tunnel_send_client_to_tid (t, msg, t->client, t->local_tid_dest);
2561 tunnel_send_client_to_tid (t, msg, t->owner, t->local_tid);
2566 * Send up to 64 buffered messages to the client for in order delivery.
2568 * @param t Tunnel on which to empty the message buffer.
2569 * @param c Client to send to.
2570 * @param rel Reliability structure to corresponding peer.
2571 * If rel == t->bck_rel, this is FWD data.
2574 tunnel_send_client_buffered_data (struct MeshTunnel *t, struct MeshClient *c,
2575 struct MeshTunnelReliability *rel)
2578 struct MeshReliableMessage *copy;
2579 struct MeshReliableMessage *next;
2581 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n");
2582 for (copy = rel->head_recv; NULL != copy; copy = next)
2585 if (copy->mid == rel->mid_recv)
2587 struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
2589 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2590 " have %u! now expecting %u\n",
2591 copy->mid, rel->mid_recv + 1);
2592 tunnel_send_client_data (t, msg, (rel == t->bck_rel));
2594 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
2599 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2600 " don't have %u, next is %u\n",
2606 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n");
2611 * We have received a message out of order, buffer it until we receive
2612 * the missing one and we can feed the rest to the client.
2614 * @param t Tunnel to add to.
2615 * @param msg Message to buffer.
2616 * @param rel Reliability data to the corresponding direction.
2619 tunnel_add_buffered_data (struct MeshTunnel *t,
2620 const struct GNUNET_MESH_Data *msg,
2621 struct MeshTunnelReliability *rel)
2623 struct MeshReliableMessage *copy;
2624 struct MeshReliableMessage *prev;
2628 size = ntohs (msg->header.size);
2629 mid = ntohl (msg->mid);
2630 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data %u\n", mid);
2632 copy = GNUNET_malloc (sizeof (*copy) + size);
2635 memcpy (©[1], msg, size);
2637 // FIXME do something better than O(n), although n < 64...
2638 // FIXME start from the end (most messages are the latest ones)
2639 for (prev = rel->head_recv; NULL != prev; prev = prev->next)
2641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %u\n", prev->mid);
2642 if (GMC_is_pid_bigger (prev->mid, mid))
2644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n");
2645 GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv,
2650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n");
2651 GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy);
2652 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data END\n");
2657 * Destroy a reliable message after it has been acknowledged, either by
2658 * direct mid ACK or bitfield. Updates the appropriate data structures and
2659 * timers and frees all memory.
2661 * @param copy Message that is no longer needed: remote peer got it.
2664 tunnel_free_reliable_message (struct MeshReliableMessage *copy)
2666 struct MeshTunnelReliability *rel;
2667 struct GNUNET_TIME_Relative time;
2670 time = GNUNET_TIME_absolute_get_duration (copy->timestamp);
2671 rel->expected_delay.rel_value *= 7;
2672 rel->expected_delay.rel_value += time.rel_value;
2673 rel->expected_delay.rel_value /= 8;
2675 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %u\n", copy->mid);
2676 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
2677 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! took %s\n",
2678 GNUNET_STRINGS_relative_time_to_string (time, GNUNET_NO));
2679 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n",
2680 GNUNET_STRINGS_relative_time_to_string (rel->expected_delay,
2682 rel->retry_timer = rel->expected_delay;
2683 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
2689 * Mark future messages as ACK'd.
2691 * @param t Tunnel whose sent buffer to clean.
2692 * @param msg DataACK message with a bitfield of future ACK'd messages.
2693 * @param rel Reliability data.
2696 tunnel_free_sent_reliable (struct MeshTunnel *t,
2697 const struct GNUNET_MESH_DataACK *msg,
2698 struct MeshTunnelReliability *rel)
2700 struct MeshReliableMessage *copy;
2701 struct MeshReliableMessage *next;
2708 bitfield = msg->futures;
2709 mid = ntohl (msg->mid);
2710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2711 "free_sent_reliable %u %llX\n",
2713 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2714 " rel %p, head %p\n",
2715 rel, rel->head_sent);
2716 for (i = 0, copy = rel->head_sent;
2717 i < 64 && NULL != copy && 0 != bitfield;
2720 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2721 " trying bit %u (mid %u)\n",
2724 if (0 == (bitfield & mask))
2727 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n");
2728 /* Bit was set, clear the bit from the bitfield */
2731 /* The i-th bit was set. Do we have that copy? */
2732 /* Skip copies with mid < target */
2733 target = mid + i + 1;
2734 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %u\n", target);
2735 while (NULL != copy && GMC_is_pid_bigger (target, copy->mid))
2738 /* Did we run out of copies? (previously freed, it's ok) */
2741 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n");
2745 /* Did we overshoot the target? (previously freed, it's ok) */
2746 if (GMC_is_pid_bigger (copy->mid, target))
2748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %u\n", copy->mid);
2752 /* Now copy->mid == target, free it */
2754 tunnel_free_reliable_message (copy);
2757 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n");
2762 * We haven't received an ACK after a certain time: restransmit the message.
2764 * @param cls Closure (MeshReliableMessage with the message to restransmit)
2765 * @param tc TaskContext.
2768 tunnel_retransmit_message (void *cls,
2769 const struct GNUNET_SCHEDULER_TaskContext *tc)
2771 struct MeshTunnelReliability *rel = cls;
2772 struct MeshReliableMessage *copy;
2773 struct MeshFlowControl *fc;
2774 struct MeshPeerQueue *q;
2775 struct MeshPeerInfo *pi;
2776 struct MeshTunnel *t;
2777 struct GNUNET_MESH_Data *payload;
2780 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
2781 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2785 copy = rel->head_sent;
2792 /* Search the message to be retransmitted in the outgoing queue */
2793 payload = (struct GNUNET_MESH_Data *) ©[1];
2794 hop = rel == t->fwd_rel ? t->next_hop : t->prev_hop;
2795 fc = rel == t->fwd_rel ? &t->prev_fc : &t->next_fc;
2796 pi = peer_get_short (hop);
2797 for (q = pi->queue_head; NULL != q; q = q->next)
2799 if (ntohs (payload->header.type) == q->type)
2801 struct GNUNET_MESH_Data *queued_data = q->cls;
2803 if (queued_data->mid == payload->mid)
2808 /* Message not found in the queue */
2811 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid);
2813 fc->last_ack_sent++;
2814 fc->last_pid_recv++;
2815 payload->pid = htonl (fc->last_pid_recv);
2816 send_prebuilt_message (&payload->header, hop, t);
2817 GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
2821 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! STILL IN QUEUE %u\n", copy->mid);
2824 rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer);
2825 rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
2826 &tunnel_retransmit_message,
2832 * Send keepalive packets for a tunnel.
2834 * @param t Tunnel to keep alive..
2835 * @param fwd Is this a FWD keepalive? (owner -> dest).
2838 tunnel_keepalive (struct MeshTunnel *t, int fwd)
2840 struct GNUNET_MESH_TunnelKeepAlive *msg;
2841 size_t size = sizeof (struct GNUNET_MESH_TunnelKeepAlive);
2846 type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE :
2847 GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE;
2848 hop = fwd ? t->next_hop : t->prev_hop;
2850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2851 "sending %s keepalive for tunnel %d\n",
2852 fwd ? "FWD" : "BCK", t->id.tid);
2854 msg = (struct GNUNET_MESH_TunnelKeepAlive *) cbuf;
2855 msg->header.size = htons (size);
2856 msg->header.type = htons (type);
2857 msg->oid = *(GNUNET_PEER_resolve2 (t->id.oid));
2858 msg->tid = htonl (t->id.tid);
2859 send_prebuilt_message (&msg->header, hop, t);
2864 * Send keepalive packets for a tunnel.
2866 * @param cls Closure (tunnel for which to send the keepalive).
2867 * @param tc Notification context.
2870 tunnel_recreate (struct MeshTunnel *t, int fwd)
2872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2873 "sending path recreate for tunnel %s[%X]\n",
2874 GNUNET_i2s (GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
2876 send_path_create (t);
2883 * Generic tunnel timer management.
2884 * Depending on the role of the peer in the tunnel will send the
2885 * appropriate message (build or keepalive)
2887 * @param t Tunnel to maintain.
2891 tunnel_maintain (struct MeshTunnel *t, int fwd)
2895 case MESH_TUNNEL_NEW:
2897 case MESH_TUNNEL_SEARCHING:
2898 /* TODO DHT GET with RO_BART */
2900 case MESH_TUNNEL_WAITING:
2901 tunnel_recreate (t, fwd);
2903 case MESH_TUNNEL_READY:
2904 tunnel_keepalive (t, fwd);
2913 tunnel_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2915 struct MeshTunnel *t = cls;
2917 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2918 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
2922 tunnel_maintain (t, GNUNET_YES);
2923 t->fwd_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
2924 &tunnel_fwd_keepalive,
2930 tunnel_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2932 struct MeshTunnel *t = cls;
2934 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
2935 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) ||
2939 tunnel_keepalive (t, GNUNET_NO);
2940 t->bck_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_path_time,
2941 &tunnel_bck_keepalive,
2947 * Send a message to all peers and clients in this tunnel that the tunnel
2948 * is no longer valid. If some peer or client should not receive the message,
2949 * should be zero'ed out before calling this function.
2951 * @param t The tunnel whose peers and clients to notify.
2954 tunnel_send_destroy (struct MeshTunnel *t)
2956 struct GNUNET_MESH_TunnelDestroy msg;
2957 struct GNUNET_PeerIdentity id;
2959 msg.header.size = htons (sizeof (msg));
2960 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);
2961 GNUNET_PEER_resolve (t->id.oid, &msg.oid);
2962 msg.tid = htonl (t->id.tid);
2963 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2964 " sending tunnel destroy for tunnel: %s [%X]\n",
2965 GNUNET_i2s (&msg.oid), t->id.tid);
2967 if (NULL == t->client && 0 != t->next_hop)
2969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " child: %u\n", t->next_hop);
2970 GNUNET_PEER_resolve (t->next_hop, &id);
2971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2972 " sending forward to %s\n",
2974 send_prebuilt_message (&msg.header, t->next_hop, t);
2976 if (NULL == t->owner && 0 != t->prev_hop)
2978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " parent: %u\n", t->prev_hop);
2979 GNUNET_PEER_resolve (t->prev_hop, &id);
2980 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2981 " sending back to %s\n",
2983 send_prebuilt_message (&msg.header, t->prev_hop, t);
2985 if (NULL != t->owner)
2987 send_local_tunnel_destroy (t, GNUNET_NO);
2989 if (NULL != t->client)
2991 send_local_tunnel_destroy (t, GNUNET_YES);
2997 * Destroy the tunnel.
2999 * This function does not generate any warning traffic to clients or peers.
3002 * Remove the tunnel from peer_info's and clients' hashmaps.
3003 * Cancel messages belonging to this tunnel queued to neighbors.
3004 * Free any allocated resources linked to the tunnel.
3006 * @param t the tunnel to destroy
3008 * @return GNUNET_OK on success
3011 tunnel_destroy (struct MeshTunnel *t)
3013 struct MeshClient *c;
3014 struct GNUNET_HashCode hash;
3024 struct GNUNET_PeerIdentity id;
3026 GNUNET_PEER_resolve (t->id.oid, &id);
3027 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s [%x]\n",
3028 GNUNET_i2s (&id), t->id.tid);
3030 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
3034 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3035 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &hash, t))
3044 GNUNET_CONTAINER_multihashmap32_remove (c->own_tunnels, t->local_tid, t))
3051 if (NULL != t->client)
3055 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_tunnels,
3056 t->local_tid_dest, t))
3062 GNUNET_CONTAINER_multihashmap32_remove (incoming_tunnels,
3063 t->local_tid_dest, t))
3070 if (0 != t->prev_hop)
3072 peer_cancel_queues (t->prev_hop, t);
3073 GNUNET_PEER_change_rc (t->prev_hop, -1);
3075 if (0 != t->next_hop)
3077 peer_cancel_queues (t->next_hop, t);
3078 GNUNET_PEER_change_rc (t->next_hop, -1);
3080 if (GNUNET_SCHEDULER_NO_TASK != t->next_fc.poll_task)
3082 GNUNET_SCHEDULER_cancel (t->next_fc.poll_task);
3083 t->next_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3085 if (GNUNET_SCHEDULER_NO_TASK != t->prev_fc.poll_task)
3087 GNUNET_SCHEDULER_cancel (t->prev_fc.poll_task);
3088 t->prev_fc.poll_task = GNUNET_SCHEDULER_NO_TASK;
3091 peer_info_remove_tunnel (peer_get_short (t->dest), t);
3094 if (GNUNET_SCHEDULER_NO_TASK != t->fwd_maintenance_task)
3095 GNUNET_SCHEDULER_cancel (t->fwd_maintenance_task);
3096 if (GNUNET_SCHEDULER_NO_TASK != t->bck_maintenance_task)
3097 GNUNET_SCHEDULER_cancel (t->bck_maintenance_task);
3100 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
3101 path_destroy (t->path);
3107 * Tunnel is empty: destroy it.
3109 * Notifies all participants (peers, cleints) about the destruction.
3111 * @param t Tunnel to destroy.
3114 tunnel_destroy_empty (struct MeshTunnel *t)
3118 struct GNUNET_PeerIdentity id;
3120 GNUNET_PEER_resolve (t->id.oid, &id);
3121 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3122 "executing destruction of empty tunnel %s [%X]\n",
3123 GNUNET_i2s (&id), t->id.tid);
3127 if (GNUNET_NO == t->destroy)
3128 tunnel_send_destroy (t);
3129 if (0 == t->pending_messages)
3132 t->destroy = GNUNET_YES;
3136 * Initialize a Flow Control structure to the initial state.
3138 * @param fc Flow Control structure to initialize.
3141 fc_init (struct MeshFlowControl *fc)
3143 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
3144 fc->last_pid_recv = (uint32_t) -1;
3145 fc->last_ack_sent = (uint32_t) -1; /* No traffic allowed yet */
3146 fc->last_ack_recv = (uint32_t) -1;
3147 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3148 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
3153 * Create a new tunnel
3155 * @param owner Who is the owner of the tunnel (short ID).
3156 * @param tid Tunnel Number of the tunnel.
3157 * @param client Clients that owns the tunnel, NULL for foreign tunnels.
3158 * @param local Tunnel Number for the tunnel, for the client point of view.
3160 * @return A new initialized tunnel. NULL on error.
3162 static struct MeshTunnel *
3163 tunnel_new (GNUNET_PEER_Id owner,
3164 MESH_TunnelNumber tid,
3165 struct MeshClient *client,
3166 MESH_TunnelNumber local)
3168 struct MeshTunnel *t;
3169 struct GNUNET_HashCode hash;
3171 if (n_tunnels >= max_tunnels && NULL == client)
3174 t = GNUNET_malloc (sizeof (struct MeshTunnel));
3177 t->queue_max = (max_msgs_queue / max_tunnels) + 1;
3179 fc_init (&t->next_fc);
3180 fc_init (&t->prev_fc);
3183 t->local_tid = local;
3185 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
3187 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3189 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3190 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3197 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3205 GNUNET_CONTAINER_multihashmap32_put (client->own_tunnels,
3207 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3211 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3221 * Set options in a tunnel, extracted from a bit flag field
3223 * @param t Tunnel to set options to.
3224 * @param options Bit array in host byte order.
3227 tunnel_set_options (struct MeshTunnel *t, uint32_t options)
3229 t->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
3230 GNUNET_YES : GNUNET_NO;
3231 t->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
3232 GNUNET_YES : GNUNET_NO;
3237 * Iterator for deleting each tunnel whose client endpoint disconnected.
3239 * @param cls Closure (client that has disconnected).
3240 * @param key The local tunnel id (used to access the hashmap).
3241 * @param value The value stored at the key (tunnel to destroy).
3243 * @return GNUNET_OK, keep iterating.
3246 tunnel_destroy_iterator (void *cls,
3250 struct MeshTunnel *t = value;
3251 struct MeshClient *c = cls;
3253 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3254 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
3255 t->local_tid, t->local_tid_dest, c->id);
3256 client_delete_tunnel (c, t);
3259 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
3261 if (0 != t->next_hop) { /* destroy could come before a path is used */
3262 GNUNET_PEER_change_rc (t->next_hop, -1);
3268 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
3270 if (0 != t->prev_hop) { /* destroy could come before a path is used */
3271 GNUNET_PEER_change_rc (t->prev_hop, -1);
3276 tunnel_destroy_empty (t);
3282 * Timeout function due to lack of keepalive/traffic from the owner.
3283 * Destroys tunnel if called.
3285 * @param cls Closure (tunnel to destroy).
3286 * @param tc TaskContext
3289 tunnel_fwd_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3291 struct MeshTunnel *t = cls;
3293 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3294 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3297 "Tunnel %s [%X] FWD timed out. Destroying.\n",
3298 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3299 if (NULL != t->client)
3300 send_local_tunnel_destroy (t, GNUNET_YES);
3301 tunnel_destroy (t); /* Do not notify other */
3306 * Timeout function due to lack of keepalive/traffic from the destination.
3307 * Destroys tunnel if called.
3309 * @param cls Closure (tunnel to destroy).
3310 * @param tc TaskContext
3313 tunnel_bck_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3315 struct MeshTunnel *t = cls;
3317 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3318 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3320 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3321 "Tunnel %s [%X] BCK timed out. Destroying.\n",
3322 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3323 if (NULL != t->owner)
3324 send_local_tunnel_destroy (t, GNUNET_NO);
3325 tunnel_destroy (t); /* Do not notify other */
3330 * Resets the tunnel timeout task, some other message has done the task's job.
3331 * - For the first peer on the direction this means to send
3332 * a keepalive or a path confirmation message (either create or ACK).
3333 * - For all other peers, this means to destroy the tunnel,
3334 * due to lack of activity.
3335 * Starts the tiemout if no timeout was running (tunnel just created).
3337 * @param t Tunnel whose timeout to reset.
3338 * @param fwd Is this forward?
3340 * TODO use heap to improve efficiency of scheduler.
3343 tunnel_reset_timeout (struct MeshTunnel *t, int fwd)
3345 GNUNET_SCHEDULER_TaskIdentifier *ti;
3346 GNUNET_SCHEDULER_Task f;
3347 struct MeshClient *c;
3349 ti = fwd ? &t->fwd_maintenance_task : &t->bck_maintenance_task;
3350 c = fwd ? t->owner : t->client;
3352 if (GNUNET_SCHEDULER_NO_TASK != *ti)
3353 GNUNET_SCHEDULER_cancel (*ti);
3357 f = fwd ? &tunnel_fwd_keepalive : &tunnel_bck_keepalive;
3358 *ti = GNUNET_SCHEDULER_add_delayed (refresh_path_time, f, t);
3362 f = fwd ? &tunnel_fwd_timeout : &tunnel_bck_timeout;
3363 *ti = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3364 (refresh_path_time, 4),
3370 /******************************************************************************/
3371 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3372 /******************************************************************************/
3375 * Free a transmission that was already queued with all resources
3376 * associated to the request.
3378 * @param queue Queue handler to cancel.
3379 * @param clear_cls Is it necessary to free associated cls?
3382 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3384 struct MeshFlowControl *fc;
3386 if (GNUNET_YES == clear_cls)
3388 switch (queue->type)
3390 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3391 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3392 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3394 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3395 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3396 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3397 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3398 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3399 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3400 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3401 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3402 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3403 " prebuilt message\n");
3404 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3406 GNUNET_MESH_DEBUG_M2S (queue->type));
3408 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3413 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3414 " type %s unknown!\n",
3415 GNUNET_MESH_DEBUG_M2S (queue->type));
3417 GNUNET_free_non_null (queue->cls);
3419 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3420 queue->peer->queue_tail,
3423 /* Delete from appropriate fc in the tunnel */
3424 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type ||
3425 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type )
3427 if (queue->peer->id == queue->tunnel->prev_hop)
3428 fc = &queue->tunnel->prev_fc;
3429 else if (queue->peer->id == queue->tunnel->next_hop)
3430 fc = &queue->tunnel->next_fc;
3434 GNUNET_free (queue);
3439 GNUNET_free (queue);
3444 * @brief Get the next transmittable message from the queue.
3446 * This will be the head, except in the case of being a data packet
3447 * not allowed by the destination peer.
3449 * @param peer Destination peer.
3451 * @return The next viable MeshPeerQueue element to send to that peer.
3452 * NULL when there are no transmittable messages.
3454 struct MeshPeerQueue *
3455 queue_get_next (const struct MeshPeerInfo *peer)
3457 struct MeshPeerQueue *q;
3459 struct GNUNET_MESH_Data *dmsg;
3460 struct MeshTunnel* t;
3464 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
3465 for (q = peer->queue_head; NULL != q; q = q->next)
3468 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3470 GNUNET_MESH_DEBUG_M2S (q->type));
3471 dmsg = (struct GNUNET_MESH_Data *) q->cls;
3472 pid = ntohl (dmsg->pid);
3475 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3476 ack = t->next_fc.last_ack_recv;
3478 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3479 ack = t->prev_fc.last_ack_recv;
3482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3486 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3487 "* ACK: %u, PID: %u, MID: %u\n",
3488 ack, pid, ntohl (dmsg->mid));
3489 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
3491 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3497 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3501 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3502 "* nothing found\n");
3508 queue_send (void *cls, size_t size, void *buf)
3510 struct MeshPeerInfo *peer = cls;
3511 struct GNUNET_MessageHeader *msg;
3512 struct MeshPeerQueue *queue;
3513 struct MeshTunnel *t;
3514 struct GNUNET_PeerIdentity dst_id;
3515 struct MeshFlowControl *fc;
3520 peer->core_transmit = NULL;
3522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
3523 queue = queue_get_next (peer);
3525 /* Queue has no internal mesh traffic nor sendable payload */
3528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
3529 if (NULL == peer->queue_head)
3530 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
3533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
3535 GNUNET_PEER_resolve (peer->id, &dst_id);
3536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3538 GNUNET_i2s (&dst_id));
3539 /* Check if buffer size is enough for the message */
3540 if (queue->size > size)
3542 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3543 "* not enough room, reissue\n");
3544 peer->core_transmit =
3545 GNUNET_CORE_notify_transmit_ready (core_handle,
3548 GNUNET_TIME_UNIT_FOREVER_REL,
3555 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
3558 GNUNET_assert (0 < t->pending_messages);
3559 t->pending_messages--;
3563 switch (queue->type)
3566 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3567 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3568 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3569 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3570 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3571 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3572 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3573 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3574 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3575 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3577 GNUNET_MESH_DEBUG_M2S (queue->type));
3579 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3580 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3581 data_size = send_core_data_raw (queue->cls, size, buf);
3582 msg = (struct GNUNET_MessageHeader *) buf;
3583 type = ntohs (msg->type);
3585 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3586 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
3587 data_size = send_core_path_create (queue->cls, size, buf);
3589 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3590 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
3591 data_size = send_core_path_ack (queue->cls, size, buf);
3595 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3596 "* type unknown: %u\n",
3601 if (0 < drop_percent &&
3602 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
3604 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3605 "Dropping message of type %s\n",
3606 GNUNET_MESH_DEBUG_M2S(queue->type));
3609 /* Free queue, but cls was freed by send_core_* */
3610 queue_destroy (queue, GNUNET_NO);
3612 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
3613 pid = ((struct GNUNET_MESH_Data *) buf)->pid;
3617 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3618 t->next_fc.last_pid_sent = pid;
3619 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES);
3620 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3622 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3624 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3625 t->prev_fc.last_pid_sent = pid;
3626 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3628 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3629 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO);
3635 /* If more data in queue, send next */
3636 queue = queue_get_next (peer);
3639 struct GNUNET_PeerIdentity id;
3641 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
3642 GNUNET_PEER_resolve (peer->id, &id);
3643 peer->core_transmit =
3644 GNUNET_CORE_notify_transmit_ready(core_handle,
3647 GNUNET_TIME_UNIT_FOREVER_REL,
3653 if (peer->id == t->next_hop)
3655 else if (peer->id == t->prev_hop)
3660 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "id: %u, next: %u, prev: %u\n",
3661 peer->id, t->next_hop, t->prev_hop);
3664 if (NULL != peer->queue_head)
3666 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task && fc->queue_n > 0)
3668 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3669 "* %s starting poll timeout\n",
3670 GNUNET_i2s (&my_full_id));
3672 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3678 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
3680 GNUNET_SCHEDULER_cancel (fc->poll_task);
3681 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3684 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
3689 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
3695 * @brief Queue and pass message to core when possible.
3697 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3698 * accounts for it. In case the queue is full, the message is dropped and
3701 * Otherwise, message is treated as internal and allowed to go regardless of
3704 * @param cls Closure (@c type dependant). It will be used by queue_send to
3705 * build the message to be sent if not already prebuilt.
3706 * @param type Type of the message, 0 for a raw message.
3707 * @param size Size of the message.
3708 * @param dst Neighbor to send message to.
3709 * @param t Tunnel this message belongs to.
3712 queue_add (void *cls, uint16_t type, size_t size,
3713 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3715 struct MeshPeerQueue *queue;
3716 struct GNUNET_PeerIdentity id;
3717 struct MeshFlowControl *fc;
3721 priority = GNUNET_NO;
3722 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3726 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3732 if (fc->queue_n >= t->queue_max)
3734 /* If this isn't a retransmission, drop the message */
3735 if (GNUNET_NO == t->reliable ||
3736 (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) ||
3737 (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type))
3739 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
3742 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3743 "queue full: %u/%u\n",
3744 fc->queue_n, t->queue_max);
3745 return; /* Drop this message */
3747 priority = GNUNET_YES;
3750 if (GMC_is_pid_bigger(fc->last_pid_sent + 1, fc->last_ack_recv) &&
3751 GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
3752 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3756 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3762 if (GNUNET_YES == priority)
3764 struct GNUNET_MESH_Data *d;
3768 GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue);
3769 d = (struct GNUNET_MESH_Data *) queue->cls;
3771 for (queue = dst->queue_tail; NULL != queue; queue = queue->prev)
3773 if (queue->type != type)
3775 d = (struct GNUNET_MESH_Data *) queue->cls;
3782 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3784 if (NULL == dst->core_transmit)
3786 GNUNET_PEER_resolve (dst->id, &id);
3787 dst->core_transmit =
3788 GNUNET_CORE_notify_transmit_ready (core_handle,
3791 GNUNET_TIME_UNIT_FOREVER_REL,
3797 t->pending_messages++;
3801 /******************************************************************************/
3802 /******************** MESH NETWORK HANDLERS **************************/
3803 /******************************************************************************/
3807 * Core handler for path creation
3809 * @param cls closure
3810 * @param message message
3811 * @param peer peer identity this notification is about
3813 * @return GNUNET_OK to keep the connection open,
3814 * GNUNET_SYSERR to close it (signal serious error)
3817 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3818 const struct GNUNET_MessageHeader *message)
3820 unsigned int own_pos;
3823 MESH_TunnelNumber tid;
3824 struct GNUNET_MESH_CreateTunnel *msg;
3825 struct GNUNET_PeerIdentity *pi;
3826 struct MeshPeerPath *path;
3827 struct MeshPeerInfo *dest_peer_info;
3828 struct MeshPeerInfo *orig_peer_info;
3829 struct MeshTunnel *t;
3831 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3832 "Received a path create msg [%s]\n",
3833 GNUNET_i2s (&my_full_id));
3834 size = ntohs (message->size);
3835 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3837 GNUNET_break_op (0);
3841 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3842 if (size % sizeof (struct GNUNET_PeerIdentity))
3844 GNUNET_break_op (0);
3847 size /= sizeof (struct GNUNET_PeerIdentity);
3850 GNUNET_break_op (0);
3853 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3854 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3856 tid = ntohl (msg->tid);
3857 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3858 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3859 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
3860 t = tunnel_get (pi, tid);
3861 if (NULL == t) /* might be a local tunnel */
3865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3866 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3872 t->port = ntohl (msg->port);
3873 opt = ntohl (msg->opt);
3874 if (0 != (opt & GNUNET_MESH_OPTION_NOBUFFER))
3876 t->nobuffer = GNUNET_YES;
3879 if (0 != (opt & GNUNET_MESH_OPTION_RELIABLE))
3881 t->reliable = GNUNET_YES;
3883 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3885 tunnel_reset_timeout (t, GNUNET_YES);
3886 tunnel_change_state (t, MESH_TUNNEL_WAITING);
3888 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3889 if (NULL == dest_peer_info)
3891 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3892 " Creating PeerInfo for destination.\n");
3893 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3894 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3895 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3897 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3899 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3900 if (NULL == orig_peer_info)
3902 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3903 " Creating PeerInfo for origin.\n");
3904 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3905 orig_peer_info->id = GNUNET_PEER_intern (pi);
3906 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3907 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3910 path = path_new (size);
3912 for (i = 0; i < size; i++)
3914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3915 GNUNET_i2s (&pi[i]));
3916 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3917 if (path->peers[i] == myid)
3920 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3921 if (own_pos == 0 && path->peers[own_pos] != myid)
3923 /* create path: self not found in path through self */
3924 GNUNET_break_op (0);
3925 path_destroy (path);
3929 path_add_to_peers (path, GNUNET_NO);
3930 tunnel_use_path (t, path);
3932 peer_info_add_tunnel (dest_peer_info, t);
3934 if (own_pos == size - 1)
3936 struct MeshClient *c;
3938 /* Find target client */
3939 c = GNUNET_CONTAINER_multihashmap32_get (ports, t->port);
3942 /* TODO send reject */
3946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3947 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3949 /* Assign local tid */
3950 while (NULL != tunnel_get_incoming (next_local_tid))
3951 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3952 t->local_tid_dest = next_local_tid++;
3953 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3955 if (GNUNET_YES == t->reliable)
3957 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
3958 t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
3960 t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
3963 tunnel_add_client (t, c);
3964 send_local_tunnel_create (t);
3966 /* Eliminate tunnel when origin dies */
3967 tunnel_reset_timeout (t, GNUNET_YES);
3968 /* Keep tunnel alive in direction dest->owner*/
3969 tunnel_reset_timeout (t, GNUNET_NO);
3973 struct MeshPeerPath *path2;
3975 t->next_hop = path->peers[own_pos + 1];
3976 GNUNET_PEER_change_rc(t->next_hop, 1);
3978 /* It's for somebody else! Retransmit. */
3979 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3980 path2 = path_duplicate (path);
3981 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3982 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3983 send_path_create (t);
3991 * Core handler for path ACKs
3993 * @param cls closure
3994 * @param message message
3995 * @param peer peer identity this notification is about
3997 * @return GNUNET_OK to keep the connection open,
3998 * GNUNET_SYSERR to close it (signal serious error)
4001 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4002 const struct GNUNET_MessageHeader *message)
4004 struct GNUNET_MESH_PathACK *msg;
4005 struct MeshPeerInfo *peer_info;
4006 struct MeshPeerPath *p;
4007 struct MeshTunnel *t;
4009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4010 GNUNET_i2s (&my_full_id));
4011 msg = (struct GNUNET_MESH_PathACK *) message;
4012 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4015 /* TODO notify that we don't know the tunnel */
4016 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4018 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4021 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4022 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4024 peer_info = peer_get (&msg->peer_id);
4025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4026 GNUNET_i2s (&msg->peer_id));
4027 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4030 /* Add path to peers? */
4034 path_add_to_peers (p, GNUNET_YES);
4040 tunnel_change_state (t, MESH_TUNNEL_READY);
4041 tunnel_reset_timeout (t, GNUNET_NO);
4042 t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0;
4043 t->prev_fc.last_ack_sent = ntohl (msg->ack);
4045 /* Message for us? */
4046 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4048 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4049 if (NULL == t->owner)
4051 GNUNET_break_op (0);
4054 if (NULL != peer_info->dhtget)
4056 GNUNET_DHT_get_stop (peer_info->dhtget);
4057 peer_info->dhtget = NULL;
4059 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_YES);
4060 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_NO);
4064 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4065 " not for us, retransmitting...\n");
4066 send_prebuilt_message (message, t->prev_hop, t);
4072 * Core handler for notifications of broken paths
4074 * @param cls closure
4075 * @param message message
4076 * @param peer peer identity this notification is about
4078 * @return GNUNET_OK to keep the connection open,
4079 * GNUNET_SYSERR to close it (signal serious error)
4082 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4083 const struct GNUNET_MessageHeader *message)
4085 struct GNUNET_MESH_PathBroken *msg;
4086 struct MeshTunnel *t;
4088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4089 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4090 msg = (struct GNUNET_MESH_PathBroken *) message;
4091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4092 GNUNET_i2s (&msg->peer1));
4093 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4094 GNUNET_i2s (&msg->peer2));
4095 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4098 GNUNET_break_op (0);
4101 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4102 GNUNET_PEER_search (&msg->peer2));
4109 * Core handler for tunnel destruction
4111 * @param cls closure
4112 * @param message message
4113 * @param peer peer identity this notification is about
4115 * @return GNUNET_OK to keep the connection open,
4116 * GNUNET_SYSERR to close it (signal serious error)
4119 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4120 const struct GNUNET_MessageHeader *message)
4122 struct GNUNET_MESH_TunnelDestroy *msg;
4123 struct MeshTunnel *t;
4125 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4127 "Got a TUNNEL DESTROY packet from %s\n",
4129 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4130 " for tunnel %s [%u]\n",
4131 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4132 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4135 /* Probably already got the message from another path,
4136 * destroyed the tunnel and retransmitted to children.
4139 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
4143 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4145 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4146 t->local_tid, t->local_tid_dest);
4148 if (GNUNET_PEER_search (peer) == t->prev_hop)
4150 // TODO check owner's signature
4151 // TODO add owner's signatue to tunnel for retransmission
4152 peer_cancel_queues (t->prev_hop, t);
4153 GNUNET_PEER_change_rc (t->prev_hop, -1);
4156 else if (GNUNET_PEER_search (peer) == t->next_hop)
4158 // TODO check dest's signature
4159 // TODO add dest's signatue to tunnel for retransmission
4160 peer_cancel_queues (t->next_hop, t);
4161 GNUNET_PEER_change_rc (t->next_hop, -1);
4166 GNUNET_break_op (0);
4167 // TODO check both owner AND destination's signature to see which matches
4168 // TODO restransmit in appropriate direction
4171 tunnel_destroy_empty (t);
4173 // TODO: add timeout to destroy the tunnel anyway
4179 * Generic handler for mesh network payload traffic.
4181 * @param peer Peer identity this notification is about.
4182 * @param message Data message.
4183 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
4185 * @return GNUNET_OK to keep the connection open,
4186 * GNUNET_SYSERR to close it (signal serious error)
4189 handle_mesh_data (const struct GNUNET_PeerIdentity *peer,
4190 const struct GNUNET_MessageHeader *message,
4193 struct GNUNET_MESH_Data *msg;
4194 struct MeshFlowControl *fc;
4195 struct MeshTunnelReliability *rel;
4196 struct MeshTunnel *t;
4197 struct MeshClient *c;
4205 size = ntohs (message->size);
4207 sizeof (struct GNUNET_MESH_Data) +
4208 sizeof (struct GNUNET_MessageHeader))
4213 type =ntohs (message->type);
4214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
4215 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4216 msg = (struct GNUNET_MESH_Data *) message;
4217 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
4218 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
4220 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4223 /* TODO notify back: we don't know this tunnel */
4224 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4225 GNUNET_break_op (0);
4229 /* Initialize FWD/BCK data */
4230 pid = ntohl (msg->pid);
4231 fc = fwd ? &t->prev_fc : &t->next_fc;
4232 c = fwd ? t->client : t->owner;
4233 rel = fwd ? t->bck_rel : t->fwd_rel;
4234 hop = fwd ? t->next_hop : t->prev_hop;
4235 if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
4237 GNUNET_STATISTICS_update (stats, "# unsolicited data", 1, GNUNET_NO);
4238 GNUNET_break_op (0);
4239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4240 "Received PID %u, (prev %u), ACK %u\n",
4241 pid, fc->last_pid_recv, fc->last_ack_sent);
4245 tunnel_change_state (t, MESH_TUNNEL_READY);
4246 tunnel_reset_timeout (t, fwd);
4249 /* TODO signature verification */
4250 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us! sending to client\n");
4251 GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
4252 if (GMC_is_pid_bigger (pid, fc->last_pid_recv))
4256 mid = ntohl (msg->mid);
4257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4258 " pid %u (mid %u) not seen yet\n", pid, mid);
4259 fc->last_pid_recv = pid;
4261 if (GNUNET_NO == t->reliable ||
4262 ( !GMC_is_pid_bigger (rel->mid_recv, mid) &&
4263 GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) )
4265 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4266 "!!! RECV %u\n", ntohl (msg->mid));
4267 if (GNUNET_YES == t->reliable)
4269 /* Is this the exact next expected messasge? */
4270 if (mid == rel->mid_recv)
4272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
4274 tunnel_send_client_data (t, msg, fwd);
4275 tunnel_send_client_buffered_data (t, c, rel);
4279 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
4280 tunnel_add_buffered_data (t, msg, rel);
4283 else /* Tunnel unreliable, send to clients directly */
4285 tunnel_send_client_data (t, msg, fwd);
4290 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4291 " MID %u not expected (%u - %u), dropping!\n",
4292 ntohl (msg->mid), rel->mid_recv, rel->mid_recv + 64);
4297 // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
4298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4299 " Pid %u not expected (%u+), dropping!\n",
4300 pid, fc->last_pid_recv + 1);
4302 tunnel_send_ack (t, type, fwd);
4305 fc->last_pid_recv = pid;
4308 GNUNET_STATISTICS_update (stats, "# data on dying tunnel", 1, GNUNET_NO);
4309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "data on dying tunnel %s[%X]\n",
4310 GNUNET_PEER_resolve2 (t->id.oid), ntohl (msg->tid));
4311 return GNUNET_OK; /* Next hop has destoyed the tunnel, drop */
4313 ttl = ntohl (msg->ttl);
4314 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4317 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4318 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4319 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, fwd);
4325 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
4326 send_prebuilt_message (message, hop, t);
4327 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4334 * Core handler for mesh network traffic going from the origin to a peer
4336 * @param cls Closure (unused).
4337 * @param message Message received.
4338 * @param peer Peer who sent the message.
4340 * @return GNUNET_OK to keep the connection open,
4341 * GNUNET_SYSERR to close it (signal serious error)
4344 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4345 const struct GNUNET_MessageHeader *message)
4347 return handle_mesh_data (peer, message, GNUNET_YES);
4351 * Core handler for mesh network traffic towards the owner of a tunnel.
4353 * @param cls Closure (unused).
4354 * @param message Message received.
4355 * @param peer Peer who sent the message.
4357 * @return GNUNET_OK to keep the connection open,
4358 * GNUNET_SYSERR to close it (signal serious error)
4361 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4362 const struct GNUNET_MessageHeader *message)
4364 return handle_mesh_data (peer, message, GNUNET_NO);
4369 * Core handler for mesh network traffic end-to-end ACKs.
4371 * @param cls Closure.
4372 * @param message Message.
4373 * @param peer Peer identity this notification is about.
4375 * @return GNUNET_OK to keep the connection open,
4376 * GNUNET_SYSERR to close it (signal serious error)
4379 handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4380 const struct GNUNET_MessageHeader *message)
4382 struct GNUNET_MESH_DataACK *msg;
4383 struct MeshTunnelReliability *rel;
4384 struct MeshReliableMessage *copy;
4385 struct MeshReliableMessage *next;
4386 struct MeshTunnel *t;
4392 type = ntohs (message->type);
4393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message from %s!\n",
4394 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4395 msg = (struct GNUNET_MESH_DataACK *) message;
4397 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4400 /* TODO notify that we dont know this tunnel (whom)? */
4401 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4404 ack = ntohl (msg->mid);
4405 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4407 /* Is this a forward or backward ACK? */
4408 id = GNUNET_PEER_search (peer);
4409 if (t->next_hop == id && GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type)
4411 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4412 if (NULL == t->owner)
4414 send_prebuilt_message (message, t->prev_hop, t);
4419 else if (t->prev_hop == id && GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK == type)
4421 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4422 if (NULL == t->client)
4424 send_prebuilt_message (message, t->next_hop, t);
4431 GNUNET_break_op (0);
4435 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %u\n", ack);
4436 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
4438 if (GMC_is_pid_bigger (copy->mid, ack))
4440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
4441 tunnel_free_sent_reliable (t, msg, rel);
4445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
4447 tunnel_free_reliable_message (copy);
4449 /* Once buffers have been free'd, send ACK */
4450 tunnel_send_ack (t, type, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type);
4452 /* If some message was free'd, update the retransmission delay*/
4453 if (GNUNET_YES == work)
4455 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
4457 GNUNET_SCHEDULER_cancel (rel->retry_task);
4458 if (NULL == rel->head_sent)
4460 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
4464 struct GNUNET_TIME_Absolute new_target;
4465 struct GNUNET_TIME_Relative delay;
4467 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
4468 MESH_RETRANSMIT_MARGIN);
4469 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
4471 delay = GNUNET_TIME_absolute_get_remaining (new_target);
4473 GNUNET_SCHEDULER_add_delayed (delay,
4474 &tunnel_retransmit_message,
4485 * Core handler for mesh network traffic point-to-point acks.
4487 * @param cls closure
4488 * @param message message
4489 * @param peer peer identity this notification is about
4491 * @return GNUNET_OK to keep the connection open,
4492 * GNUNET_SYSERR to close it (signal serious error)
4495 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4496 const struct GNUNET_MessageHeader *message)
4498 struct GNUNET_MESH_ACK *msg;
4499 struct MeshTunnel *t;
4500 struct MeshFlowControl *fc;
4504 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4506 msg = (struct GNUNET_MESH_ACK *) message;
4508 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4512 /* TODO notify that we dont know this tunnel (whom)? */
4513 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4516 ack = ntohl (msg->pid);
4517 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4519 /* Is this a forward or backward ACK? */
4520 id = GNUNET_PEER_search (peer);
4521 if (t->next_hop == id)
4523 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4526 else if (t->prev_hop == id)
4528 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4533 GNUNET_break_op (0);
4537 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
4538 GMC_is_pid_bigger (ack, fc->last_ack_recv))
4540 GNUNET_SCHEDULER_cancel (fc->poll_task);
4541 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4542 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4545 fc->last_ack_recv = ack;
4546 peer_unlock_queue (id);
4547 tunnel_change_state (t, MESH_TUNNEL_READY);
4549 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, t->next_hop == id);
4556 * Core handler for mesh network traffic point-to-point ack polls.
4558 * @param cls closure
4559 * @param message message
4560 * @param peer peer identity this notification is about
4562 * @return GNUNET_OK to keep the connection open,
4563 * GNUNET_SYSERR to close it (signal serious error)
4566 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4567 const struct GNUNET_MessageHeader *message)
4569 struct GNUNET_MESH_Poll *msg;
4570 struct MeshTunnel *t;
4571 struct MeshFlowControl *fc;
4576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
4579 msg = (struct GNUNET_MESH_Poll *) message;
4581 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4585 /* TODO notify that we dont know this tunnel (whom)? */
4586 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4587 GNUNET_break_op (0);
4591 /* Is this a forward or backward ACK? */
4592 id = GNUNET_PEER_search (peer);
4593 pid = ntohl (msg->pid);
4594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid);
4595 if (t->next_hop == id)
4597 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4599 old = fc->last_pid_recv;
4601 else if (t->prev_hop == id)
4603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4605 old = fc->last_pid_recv;
4613 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", fc->last_pid_recv);
4614 fc->last_pid_recv = pid;
4615 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, t->prev_hop == id);
4617 if (GNUNET_YES == t->reliable)
4618 fc->last_pid_recv = old;
4625 * Core handler for mesh keepalives.
4627 * @param cls closure
4628 * @param message message
4629 * @param peer peer identity this notification is about
4630 * @return GNUNET_OK to keep the connection open,
4631 * GNUNET_SYSERR to close it (signal serious error)
4633 * TODO: Check who we got this from, to validate route.
4636 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4637 const struct GNUNET_MessageHeader *message)
4639 struct GNUNET_MESH_TunnelKeepAlive *msg;
4640 struct MeshTunnel *t;
4641 struct MeshClient *c;
4645 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4646 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4649 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4652 /* TODO notify that we dont know that tunnel */
4653 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4658 fwd = GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE == ntohs (message->type) ?
4659 GNUNET_YES : GNUNET_NO;
4660 c = fwd ? t->client : t->owner;
4661 hop = fwd ? t->next_hop : t->prev_hop;
4664 tunnel_change_state (t, MESH_TUNNEL_READY);
4665 tunnel_reset_timeout (t, fwd);
4666 if (NULL != c || 0 == hop || myid == hop)
4669 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4670 send_prebuilt_message (message, hop, t);
4677 * Functions to handle messages from core
4679 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4680 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4681 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4682 sizeof (struct GNUNET_MESH_PathBroken)},
4683 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4684 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4685 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4686 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4687 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK,
4688 sizeof (struct GNUNET_MESH_DataACK)},
4689 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK,
4690 sizeof (struct GNUNET_MESH_DataACK)},
4691 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE,
4692 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4693 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE,
4694 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4695 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4696 sizeof (struct GNUNET_MESH_ACK)},
4697 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4698 sizeof (struct GNUNET_MESH_Poll)},
4699 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4700 sizeof (struct GNUNET_MESH_PathACK)},
4706 * Function to process paths received for a new peer addition. The recorded
4707 * paths form the initial tunnel, which can be optimized later.
4708 * Called on each result obtained for the DHT search.
4710 * @param cls closure
4711 * @param exp when will this value expire
4712 * @param key key of the result
4713 * @param get_path path of the get request
4714 * @param get_path_length lenght of get_path
4715 * @param put_path path of the put request
4716 * @param put_path_length length of the put_path
4717 * @param type type of the result
4718 * @param size number of bytes in data
4719 * @param data pointer to the result data
4722 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4723 const struct GNUNET_HashCode * key,
4724 const struct GNUNET_PeerIdentity *get_path,
4725 unsigned int get_path_length,
4726 const struct GNUNET_PeerIdentity *put_path,
4727 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4728 size_t size, const void *data)
4730 struct MeshPeerInfo *peer = cls;
4731 struct MeshPeerPath *p;
4732 struct GNUNET_PeerIdentity pi;
4735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4736 GNUNET_PEER_resolve (peer->id, &pi);
4737 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4739 p = path_build_from_dht (get_path, get_path_length,
4740 put_path, put_path_length);
4741 path_add_to_peers (p, GNUNET_NO);
4743 for (i = 0; i < peer->ntunnels; i++)
4745 struct GNUNET_PeerIdentity id;
4747 GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id);
4748 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n",
4749 GNUNET_i2s (&id), peer->tunnels[i]->id.tid,
4750 peer->tunnels[i]->local_tid,
4751 peer->tunnels[i]->local_tid_dest);
4752 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
4754 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
4755 peer_connect (peer, peer->tunnels[i]);
4763 /******************************************************************************/
4764 /********************* MESH LOCAL HANDLES **************************/
4765 /******************************************************************************/
4769 * Handler for client connection.
4771 * @param cls Closure (unused).
4772 * @param client Client handler.
4775 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
4777 struct MeshClient *c;
4781 c = GNUNET_malloc (sizeof (struct MeshClient));
4783 GNUNET_SERVER_client_keep (client);
4784 GNUNET_SERVER_client_set_user_context (client, c);
4785 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4790 * Handler for client disconnection
4792 * @param cls closure
4793 * @param client identification of the client; NULL
4794 * for the last call when the server is destroyed
4797 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4799 struct MeshClient *c;
4800 struct MeshClient *next;
4802 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
4805 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4809 c = client_get (client);
4812 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
4814 GNUNET_SERVER_client_drop (c->handle);
4815 c->shutting_down = GNUNET_YES;
4816 if (NULL != c->own_tunnels)
4818 GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels,
4819 &tunnel_destroy_iterator, c);
4820 GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels);
4823 if (NULL != c->incoming_tunnels)
4825 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels,
4826 &tunnel_destroy_iterator, c);
4827 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels);
4830 if (NULL != c->ports)
4831 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
4833 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4834 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
4836 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4841 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
4843 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4849 * Handler for new clients
4851 * @param cls closure
4852 * @param client identification of the client
4853 * @param message the actual message, which includes messages the client wants
4856 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4857 const struct GNUNET_MessageHeader *message)
4859 struct GNUNET_MESH_ClientConnect *cc_msg;
4860 struct MeshClient *c;
4865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
4867 /* Check data sanity */
4868 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4869 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4870 if (0 != (size % sizeof (uint32_t)))
4873 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4876 size /= sizeof (uint32_t);
4878 /* Initialize new client structure */
4879 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
4880 c->id = next_client_id++; /* overflow not important: just for debug */
4881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
4882 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
4887 p = (uint32_t *) &cc_msg[1];
4888 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
4889 for (i = 0; i < size; i++)
4892 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
4894 /* store in client's hashmap */
4895 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
4896 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4897 /* store in global hashmap */
4898 /* FIXME only allow one client to have the port open,
4899 * have a backup hashmap with waiting clients */
4900 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
4901 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4905 c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4906 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4907 GNUNET_SERVER_notification_context_add (nc, client);
4908 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
4910 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4911 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
4916 * Handler for requests of new tunnels
4918 * @param cls Closure.
4919 * @param client Identification of the client.
4920 * @param message The actual message.
4923 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
4924 const struct GNUNET_MessageHeader *message)
4926 struct GNUNET_MESH_TunnelMessage *t_msg;
4927 struct MeshPeerInfo *peer_info;
4928 struct MeshTunnel *t;
4929 struct MeshClient *c;
4930 MESH_TunnelNumber tid;
4932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
4934 /* Sanity check for client registration */
4935 if (NULL == (c = client_get (client)))
4938 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4943 /* Message size sanity check */
4944 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4947 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4951 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4952 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4953 GNUNET_i2s (&t_msg->peer));
4954 /* Sanity check for tunnel numbering */
4955 tid = ntohl (t_msg->tunnel_id);
4956 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4959 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4962 /* Sanity check for duplicate tunnel IDs */
4963 if (NULL != tunnel_get_by_local_id (c, tid))
4966 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4971 while (NULL != tunnel_get_by_pi (myid, next_tid))
4972 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4973 t = tunnel_new (myid, next_tid, c, tid);
4974 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4978 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4981 t->port = ntohl (t_msg->port);
4982 tunnel_set_options (t, ntohl (t_msg->opt));
4983 if (GNUNET_YES == t->reliable)
4985 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
4986 t->fwd_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
4988 t->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
4991 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
4992 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
4994 peer_info = peer_get (&t_msg->peer);
4995 peer_info_add_tunnel (peer_info, t);
4996 peer_connect (peer_info, t);
4997 tunnel_reset_timeout (t, GNUNET_YES);
4998 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5004 * Handler for requests of deleting tunnels
5006 * @param cls closure
5007 * @param client identification of the client
5008 * @param message the actual message
5011 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
5012 const struct GNUNET_MessageHeader *message)
5014 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5015 struct MeshClient *c;
5016 struct MeshTunnel *t;
5017 MESH_TunnelNumber tid;
5019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5020 "Got a DESTROY TUNNEL from client!\n");
5022 /* Sanity check for client registration */
5023 if (NULL == (c = client_get (client)))
5026 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5031 /* Message sanity check */
5032 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5035 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5039 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5041 /* Retrieve tunnel */
5042 tid = ntohl (tunnel_msg->tunnel_id);
5043 t = tunnel_get_by_local_id (c, tid);
5046 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5048 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5052 /* Cleanup after the tunnel */
5053 client_delete_tunnel (c, t);
5054 if (c == t->client && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV >= tid)
5058 else if (c == t->owner && GNUNET_MESH_LOCAL_TUNNEL_ID_SERV < tid)
5060 peer_info_remove_tunnel (peer_get_short (t->dest), t);
5065 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5066 " tunnel %X client %p (%p, %p)\n",
5067 tid, c, t->owner, t->client);
5071 /* The tunnel will be destroyed when the last message is transmitted. */
5072 tunnel_destroy_empty (t);
5074 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5080 * Handler for client traffic
5082 * @param cls closure
5083 * @param client identification of the client
5084 * @param message the actual message
5087 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
5088 const struct GNUNET_MessageHeader *message)
5090 struct GNUNET_MESH_LocalData *data_msg;
5091 struct MeshClient *c;
5092 struct MeshTunnel *t;
5093 struct MeshFlowControl *fc;
5094 MESH_TunnelNumber tid;
5097 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5098 "Got data from a client!\n");
5100 /* Sanity check for client registration */
5101 if (NULL == (c = client_get (client)))
5104 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5107 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5109 data_msg = (struct GNUNET_MESH_LocalData *) message;
5111 /* Sanity check for message size */
5112 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
5113 if (size < sizeof (struct GNUNET_MessageHeader))
5116 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5120 /* Tunnel exists? */
5121 tid = ntohl (data_msg->tid);
5122 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI)
5125 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5128 t = tunnel_get_by_local_id (c, tid);
5132 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5136 /* Is the client in the tunnel? */
5137 if ( !( (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5139 t->owner->handle == client)
5141 (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5143 t->client->handle == client) ) )
5146 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5150 /* Ok, everything is correct, send the message
5151 * (pretend we got it from a mesh peer)
5154 struct GNUNET_MESH_Data *payload;
5155 char cbuf[sizeof(struct GNUNET_MESH_Data) + size];
5157 fc = tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? &t->prev_fc : &t->next_fc;
5158 if (GNUNET_YES == t->reliable)
5160 struct MeshTunnelReliability *rel;
5161 struct MeshReliableMessage *copy;
5163 rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel;
5164 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage)
5165 + sizeof(struct GNUNET_MESH_Data)
5167 copy->mid = rel->mid_sent++;
5168 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->mid);
5169 copy->timestamp = GNUNET_TIME_absolute_get ();
5172 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
5173 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
5174 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
5177 GNUNET_TIME_relative_multiply (rel->expected_delay,
5178 MESH_RETRANSMIT_MARGIN);
5180 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
5181 &tunnel_retransmit_message,
5184 payload = (struct GNUNET_MESH_Data *) ©[1];
5185 payload->mid = htonl (copy->mid);
5189 payload = (struct GNUNET_MESH_Data *) cbuf;
5190 payload->mid = htonl (fc->last_pid_recv + 1);
5192 memcpy (&payload[1], &data_msg[1], size);
5193 payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size);
5194 payload->header.type = htons (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ?
5195 GNUNET_MESSAGE_TYPE_MESH_UNICAST :
5196 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5197 GNUNET_PEER_resolve(t->id.oid, &payload->oid);;
5198 payload->tid = htonl (t->id.tid);
5199 payload->ttl = htonl (default_ttl);
5200 payload->pid = htonl (fc->last_pid_recv + 1);
5201 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5202 " calling generic handler...\n");
5203 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5204 handle_mesh_unicast (NULL, &my_full_id, &payload->header);
5206 handle_mesh_to_orig (NULL, &my_full_id, &payload->header);
5208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
5209 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5216 * Handler for client's ACKs for payload traffic.
5218 * @param cls Closure (unused).
5219 * @param client Identification of the client.
5220 * @param message The actual message.
5223 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5224 const struct GNUNET_MessageHeader *message)
5226 struct GNUNET_MESH_LocalAck *msg;
5227 struct MeshTunnel *t;
5228 struct MeshClient *c;
5229 MESH_TunnelNumber tid;
5231 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5232 /* Sanity check for client registration */
5233 if (NULL == (c = client_get (client)))
5236 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5239 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5241 msg = (struct GNUNET_MESH_LocalAck *) message;
5243 /* Tunnel exists? */
5244 tid = ntohl (msg->tunnel_id);
5245 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5246 t = tunnel_get_by_local_id (c, tid);
5250 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5251 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5252 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5256 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5257 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5259 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5260 t->prev_fc.last_ack_recv++;
5261 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_NO);
5265 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5266 t->next_fc.last_ack_recv++;
5267 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_YES);
5270 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5278 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5280 * @param cls Closure (client handle).
5281 * @param key Key (hashed tunnel ID, unused).
5282 * @param value Tunnel info.
5284 * @return GNUNET_YES, to keep iterating.
5287 monitor_all_tunnels_iterator (void *cls,
5288 const struct GNUNET_HashCode * key,
5291 struct GNUNET_SERVER_Client *client = cls;
5292 struct MeshTunnel *t = value;
5293 struct GNUNET_MESH_LocalMonitor *msg;
5295 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5296 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5297 msg->tunnel_id = htonl (t->id.tid);
5298 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5299 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5300 GNUNET_PEER_resolve (t->dest, &msg->destination);
5302 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5303 "* sending info about tunnel %s [%u]\n",
5304 GNUNET_i2s (&msg->owner), t->id.tid);
5306 GNUNET_SERVER_notification_context_unicast (nc, client,
5307 &msg->header, GNUNET_NO);
5313 * Handler for client's MONITOR request.
5315 * @param cls Closure (unused).
5316 * @param client Identification of the client.
5317 * @param message The actual message.
5320 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5321 const struct GNUNET_MessageHeader *message)
5323 struct MeshClient *c;
5325 /* Sanity check for client registration */
5326 if (NULL == (c = client_get (client)))
5329 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5333 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5334 "Received get tunnels request from client %u\n",
5336 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5337 monitor_all_tunnels_iterator,
5339 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5340 "Get tunnels request from client %u completed\n",
5342 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5347 * Handler for client's MONITOR_TUNNEL request.
5349 * @param cls Closure (unused).
5350 * @param client Identification of the client.
5351 * @param message The actual message.
5354 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5355 const struct GNUNET_MessageHeader *message)
5357 const struct GNUNET_MESH_LocalMonitor *msg;
5358 struct GNUNET_MESH_LocalMonitor *resp;
5359 struct MeshClient *c;
5360 struct MeshTunnel *t;
5362 /* Sanity check for client registration */
5363 if (NULL == (c = client_get (client)))
5366 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5370 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5371 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5372 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5375 ntohl (msg->tunnel_id));
5376 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5379 /* We don't know the tunnel FIXME */
5380 struct GNUNET_MESH_LocalMonitor warn;
5383 GNUNET_SERVER_notification_context_unicast (nc, client,
5386 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5390 /* Initialize context */
5391 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5393 GNUNET_PEER_resolve (t->dest, &resp->destination);
5394 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5395 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5396 &resp->header, GNUNET_NO);
5399 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5400 "Monitor tunnel request from client %u completed\n",
5402 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5407 * Functions to handle messages from clients
5409 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5410 {&handle_local_new_client, NULL,
5411 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5412 {&handle_local_tunnel_create, NULL,
5413 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5414 sizeof (struct GNUNET_MESH_TunnelMessage)},
5415 {&handle_local_tunnel_destroy, NULL,
5416 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5417 sizeof (struct GNUNET_MESH_TunnelMessage)},
5418 {&handle_local_data, NULL,
5419 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
5420 {&handle_local_ack, NULL,
5421 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5422 sizeof (struct GNUNET_MESH_LocalAck)},
5423 {&handle_local_get_tunnels, NULL,
5424 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5425 sizeof (struct GNUNET_MessageHeader)},
5426 {&handle_local_show_tunnel, NULL,
5427 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5428 sizeof (struct GNUNET_MESH_LocalMonitor)},
5434 * Method called whenever a given peer connects.
5436 * @param cls closure
5437 * @param peer peer identity this notification is about
5440 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5442 struct MeshPeerInfo *peer_info;
5443 struct MeshPeerPath *path;
5445 DEBUG_CONN ("Peer connected\n");
5446 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5447 peer_info = peer_get (peer);
5448 if (myid == peer_info->id)
5450 DEBUG_CONN (" (self)\n");
5451 path = path_new (1);
5455 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5456 path = path_new (2);
5457 path->peers[1] = peer_info->id;
5458 GNUNET_PEER_change_rc (peer_info->id, 1);
5459 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5461 path->peers[0] = myid;
5462 GNUNET_PEER_change_rc (myid, 1);
5463 peer_info_add_path (peer_info, path, GNUNET_YES);
5469 * Method called whenever a peer disconnects.
5471 * @param cls closure
5472 * @param peer peer identity this notification is about
5475 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5477 struct MeshPeerInfo *pi;
5478 struct MeshPeerQueue *q;
5479 struct MeshPeerQueue *n;
5481 DEBUG_CONN ("Peer disconnected\n");
5482 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5492 /* TODO try to reroute this traffic instead */
5493 queue_destroy(q, GNUNET_YES);
5496 if (NULL != pi->core_transmit)
5498 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5499 pi->core_transmit = NULL;
5501 peer_info_remove_path (pi, pi->id, myid);
5504 DEBUG_CONN (" (self)\n");
5506 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5512 * Install server (service) handlers and start listening to clients.
5517 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5518 GNUNET_SERVER_connect_notify (server_handle,
5519 &handle_local_client_connect, NULL);
5520 GNUNET_SERVER_disconnect_notify (server_handle,
5521 &handle_local_client_disconnect, NULL);
5522 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5524 clients_head = NULL;
5525 clients_tail = NULL;
5527 GNUNET_SERVER_resume (server_handle);
5532 * To be called on core init/fail.
5534 * @param cls Closure (config)
5535 * @param server handle to the server for this service
5536 * @param identity the public identity of this peer
5539 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5540 const struct GNUNET_PeerIdentity *identity)
5542 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5545 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5546 GNUNET_break (core_handle == server);
5547 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5550 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5551 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5553 GNUNET_i2s (identity));
5554 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5556 GNUNET_i2s (&my_full_id));
5557 GNUNET_CORE_disconnect (core_handle);
5558 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5559 NULL, /* Closure passed to MESH functions */
5560 &core_init, /* Call core_init once connected */
5561 &core_connect, /* Handle connects */
5562 &core_disconnect, /* remove peers on disconnects */
5563 NULL, /* Don't notify about all incoming messages */
5564 GNUNET_NO, /* For header only in notification */
5565 NULL, /* Don't notify about all outbound messages */
5566 GNUNET_NO, /* For header-only out notification */
5567 core_handlers); /* Register these handlers */
5576 /******************************************************************************/
5577 /************************ MAIN FUNCTIONS ****************************/
5578 /******************************************************************************/
5581 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5583 * @param cls closure
5584 * @param key current key code
5585 * @param value value in the hash map
5586 * @return GNUNET_YES if we should continue to iterate,
5590 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5592 struct MeshTunnel *t = value;
5599 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5601 * @param cls closure
5602 * @param key current key code
5603 * @param value value in the hash map
5604 * @return GNUNET_YES if we should continue to iterate,
5608 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5610 struct MeshPeerInfo *p = value;
5611 struct MeshPeerQueue *q;
5612 struct MeshPeerQueue *n;
5620 queue_destroy(q, GNUNET_YES);
5624 peer_info_destroy (p);
5630 * Task run during shutdown.
5636 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5638 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5640 if (core_handle != NULL)
5642 GNUNET_CORE_disconnect (core_handle);
5645 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5646 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5647 if (dht_handle != NULL)
5649 GNUNET_DHT_disconnect (dht_handle);
5654 GNUNET_SERVER_notification_context_destroy (nc);
5657 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5659 GNUNET_SCHEDULER_cancel (announce_id_task);
5660 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5662 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5667 * Process mesh requests.
5669 * @param cls closure
5670 * @param server the initialized server
5671 * @param c configuration to use
5674 run (void *cls, struct GNUNET_SERVER_Handle *server,
5675 const struct GNUNET_CONFIGURATION_Handle *c)
5678 struct GNUNET_CRYPTO_EccPrivateKey *pk;
5680 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5681 server_handle = server;
5682 GNUNET_SERVER_suspend (server_handle);
5685 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5688 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5690 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5691 "mesh", "peer/privatekey");
5692 GNUNET_SCHEDULER_shutdown ();
5697 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5698 &refresh_path_time))
5700 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5702 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5703 "mesh", "refresh path time");
5704 GNUNET_SCHEDULER_shutdown ();
5709 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5712 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5714 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5715 "mesh", "id announce time");
5716 GNUNET_SCHEDULER_shutdown ();
5721 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5724 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5726 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5727 "mesh", "connect timeout");
5728 GNUNET_SCHEDULER_shutdown ();
5733 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5736 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5738 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5739 "mesh", "max msgs queue");
5740 GNUNET_SCHEDULER_shutdown ();
5745 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5748 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5750 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5751 "mesh", "max tunnels");
5752 GNUNET_SCHEDULER_shutdown ();
5757 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5760 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5762 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5763 "mesh", "default ttl", 64);
5768 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5771 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5772 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5773 "mesh", "max peers", 1000);
5778 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
5785 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5786 "Mesh is running with drop mode enabled. "
5787 "This is NOT a good idea! "
5788 "Remove the DROP_PERCENT option from your configuration.\n");
5792 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5793 &dht_replication_level))
5795 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5797 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5798 "mesh", "dht replication level", 3);
5799 dht_replication_level = 3;
5802 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5803 incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5804 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5805 ports = GNUNET_CONTAINER_multihashmap32_create (32);
5807 dht_handle = GNUNET_DHT_connect (c, 64);
5808 if (NULL == dht_handle)
5812 stats = GNUNET_STATISTICS_create ("mesh", c);
5814 /* Scheduled the task to clean up when shutdown is called */
5815 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5817 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
5818 GNUNET_free (keyfile);
5819 GNUNET_assert (NULL != pk);
5820 my_private_key = pk;
5821 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5822 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5823 &my_full_id.hashPubKey);
5824 myid = GNUNET_PEER_intern (&my_full_id);
5825 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5826 "Mesh for peer [%s] starting\n",
5827 GNUNET_i2s(&my_full_id));
5829 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5830 NULL, /* Closure passed to MESH functions */
5831 &core_init, /* Call core_init once connected */
5832 &core_connect, /* Handle connects */
5833 &core_disconnect, /* remove peers on disconnects */
5834 NULL, /* Don't notify about all incoming messages */
5835 GNUNET_NO, /* For header only in notification */
5836 NULL, /* Don't notify about all outbound messages */
5837 GNUNET_NO, /* For header-only out notification */
5838 core_handlers); /* Register these handlers */
5839 if (NULL == core_handle)
5842 GNUNET_SCHEDULER_shutdown ();
5846 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5847 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5853 * The main function for the mesh service.
5855 * @param argc number of arguments from the command line
5856 * @param argv command line arguments
5857 * @return 0 ok, 1 on error
5860 main (int argc, char *const *argv)
5865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5866 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5868 ret = (GNUNET_OK == r) ? 0 : 1;
5869 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");