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);
3181 t->local_tid = local;
3183 GNUNET_STATISTICS_update (stats, "# tunnels", 1, GNUNET_NO);
3185 GNUNET_CRYPTO_hash (&t->id, sizeof (struct MESH_TunnelID), &hash);
3187 GNUNET_CONTAINER_multihashmap_put (tunnels, &hash, t,
3188 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3195 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3203 GNUNET_CONTAINER_multihashmap32_put (client->own_tunnels,
3205 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
3209 GNUNET_SERVER_receive_done (client->handle, GNUNET_SYSERR);
3219 * Set options in a tunnel, extracted from a bit flag field
3221 * @param t Tunnel to set options to.
3222 * @param options Bit array in host byte order.
3225 tunnel_set_options (struct MeshTunnel *t, uint32_t options)
3227 t->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
3228 GNUNET_YES : GNUNET_NO;
3229 t->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
3230 GNUNET_YES : GNUNET_NO;
3235 * Iterator for deleting each tunnel whose client endpoint disconnected.
3237 * @param cls Closure (client that has disconnected).
3238 * @param key The local tunnel id (used to access the hashmap).
3239 * @param value The value stored at the key (tunnel to destroy).
3241 * @return GNUNET_OK, keep iterating.
3244 tunnel_destroy_iterator (void *cls,
3248 struct MeshTunnel *t = value;
3249 struct MeshClient *c = cls;
3251 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3252 " Tunnel %X / %X destroy, due to client %u shutdown.\n",
3253 t->local_tid, t->local_tid_dest, c->id);
3254 client_delete_tunnel (c, t);
3257 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
3259 if (0 != t->next_hop) { /* destroy could come before a path is used */
3260 GNUNET_PEER_change_rc (t->next_hop, -1);
3266 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
3268 if (0 != t->prev_hop) { /* destroy could come before a path is used */
3269 GNUNET_PEER_change_rc (t->prev_hop, -1);
3274 tunnel_destroy_empty (t);
3280 * Timeout function due to lack of keepalive/traffic from the owner.
3281 * Destroys tunnel if called.
3283 * @param cls Closure (tunnel to destroy).
3284 * @param tc TaskContext
3287 tunnel_fwd_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3289 struct MeshTunnel *t = cls;
3291 t->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3292 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3295 "Tunnel %s [%X] FWD timed out. Destroying.\n",
3296 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3297 if (NULL != t->client)
3298 send_local_tunnel_destroy (t, GNUNET_YES);
3299 tunnel_destroy (t); /* Do not notify other */
3304 * Timeout function due to lack of keepalive/traffic from the destination.
3305 * Destroys tunnel if called.
3307 * @param cls Closure (tunnel to destroy).
3308 * @param tc TaskContext
3311 tunnel_bck_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
3313 struct MeshTunnel *t = cls;
3315 t->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
3316 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3318 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3319 "Tunnel %s [%X] BCK timed out. Destroying.\n",
3320 GNUNET_i2s(GNUNET_PEER_resolve2 (t->id.oid)), t->id.tid);
3321 if (NULL != t->owner)
3322 send_local_tunnel_destroy (t, GNUNET_NO);
3323 tunnel_destroy (t); /* Do not notify other */
3328 * Resets the tunnel timeout task, some other message has done the task's job.
3329 * - For the first peer on the direction this means to send
3330 * a keepalive or a path confirmation message (either create or ACK).
3331 * - For all other peers, this means to destroy the tunnel,
3332 * due to lack of activity.
3333 * Starts the tiemout if no timeout was running (tunnel just created).
3335 * @param t Tunnel whose timeout to reset.
3336 * @param fwd Is this forward?
3338 * TODO use heap to improve efficiency of scheduler.
3341 tunnel_reset_timeout (struct MeshTunnel *t, int fwd)
3343 GNUNET_SCHEDULER_TaskIdentifier *ti;
3344 GNUNET_SCHEDULER_Task f;
3345 struct MeshClient *c;
3347 ti = fwd ? &t->fwd_maintenance_task : &t->bck_maintenance_task;
3348 c = fwd ? t->owner : t->client;
3350 if (GNUNET_SCHEDULER_NO_TASK != *ti)
3351 GNUNET_SCHEDULER_cancel (*ti);
3355 f = fwd ? &tunnel_fwd_keepalive : &tunnel_bck_keepalive;
3356 *ti = GNUNET_SCHEDULER_add_delayed (refresh_path_time, f, t);
3360 f = fwd ? &tunnel_fwd_timeout : &tunnel_bck_timeout;
3361 *ti = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
3362 (refresh_path_time, 4),
3368 /******************************************************************************/
3369 /**************** MESH NETWORK HANDLER HELPERS ***********************/
3370 /******************************************************************************/
3373 * Free a transmission that was already queued with all resources
3374 * associated to the request.
3376 * @param queue Queue handler to cancel.
3377 * @param clear_cls Is it necessary to free associated cls?
3380 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
3382 struct MeshFlowControl *fc;
3384 if (GNUNET_YES == clear_cls)
3386 switch (queue->type)
3388 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3389 GNUNET_log (GNUNET_ERROR_TYPE_INFO, " cancelling TUNNEL_DESTROY\n");
3390 GNUNET_break (GNUNET_YES == queue->tunnel->destroy);
3392 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3393 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3394 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3395 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3396 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3397 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3398 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3399 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3400 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3401 " prebuilt message\n");
3402 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3404 GNUNET_MESH_DEBUG_M2S (queue->type));
3406 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3407 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " type create path\n");
3411 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
3412 " type %s unknown!\n",
3413 GNUNET_MESH_DEBUG_M2S (queue->type));
3415 GNUNET_free_non_null (queue->cls);
3417 GNUNET_CONTAINER_DLL_remove (queue->peer->queue_head,
3418 queue->peer->queue_tail,
3421 /* Delete from appropriate fc in the tunnel */
3422 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == queue->type ||
3423 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == queue->type )
3425 if (queue->peer->id == queue->tunnel->prev_hop)
3426 fc = &queue->tunnel->prev_fc;
3427 else if (queue->peer->id == queue->tunnel->next_hop)
3428 fc = &queue->tunnel->next_fc;
3432 GNUNET_free (queue);
3437 GNUNET_free (queue);
3442 * @brief Get the next transmittable message from the queue.
3444 * This will be the head, except in the case of being a data packet
3445 * not allowed by the destination peer.
3447 * @param peer Destination peer.
3449 * @return The next viable MeshPeerQueue element to send to that peer.
3450 * NULL when there are no transmittable messages.
3452 struct MeshPeerQueue *
3453 queue_get_next (const struct MeshPeerInfo *peer)
3455 struct MeshPeerQueue *q;
3457 struct GNUNET_MESH_Data *dmsg;
3458 struct MeshTunnel* t;
3462 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* selecting message\n");
3463 for (q = peer->queue_head; NULL != q; q = q->next)
3466 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3468 GNUNET_MESH_DEBUG_M2S (q->type));
3469 dmsg = (struct GNUNET_MESH_Data *) q->cls;
3470 pid = ntohl (dmsg->pid);
3473 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3474 ack = t->next_fc.last_ack_recv;
3476 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3477 ack = t->prev_fc.last_ack_recv;
3480 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3484 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3485 "* ACK: %u, PID: %u, MID: %u\n",
3486 ack, pid, ntohl (dmsg->mid));
3487 if (GNUNET_NO == GMC_is_pid_bigger (pid, ack))
3489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3495 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3500 "* nothing found\n");
3506 queue_send (void *cls, size_t size, void *buf)
3508 struct MeshPeerInfo *peer = cls;
3509 struct GNUNET_MessageHeader *msg;
3510 struct MeshPeerQueue *queue;
3511 struct MeshTunnel *t;
3512 struct GNUNET_PeerIdentity dst_id;
3513 struct MeshFlowControl *fc;
3518 peer->core_transmit = NULL;
3520 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send\n");
3521 queue = queue_get_next (peer);
3523 /* Queue has no internal mesh traffic nor sendable payload */
3526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not ready, return\n");
3527 if (NULL == peer->queue_head)
3528 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
3531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not empty\n");
3533 GNUNET_PEER_resolve (peer->id, &dst_id);
3534 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3536 GNUNET_i2s (&dst_id));
3537 /* Check if buffer size is enough for the message */
3538 if (queue->size > size)
3540 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3541 "* not enough room, reissue\n");
3542 peer->core_transmit =
3543 GNUNET_CORE_notify_transmit_ready (core_handle,
3546 GNUNET_TIME_UNIT_FOREVER_REL,
3553 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size ok\n");
3556 GNUNET_assert (0 < t->pending_messages);
3557 t->pending_messages--;
3561 switch (queue->type)
3564 case GNUNET_MESSAGE_TYPE_MESH_ACK:
3565 case GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK:
3566 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK:
3567 case GNUNET_MESSAGE_TYPE_MESH_POLL:
3568 case GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN:
3569 case GNUNET_MESSAGE_TYPE_MESH_PATH_DESTROY:
3570 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
3571 case GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE:
3572 case GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE:
3573 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3575 GNUNET_MESH_DEBUG_M2S (queue->type));
3577 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3578 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3579 data_size = send_core_data_raw (queue->cls, size, buf);
3580 msg = (struct GNUNET_MessageHeader *) buf;
3581 type = ntohs (msg->type);
3583 case GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE:
3584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
3585 data_size = send_core_path_create (queue->cls, size, buf);
3587 case GNUNET_MESSAGE_TYPE_MESH_PATH_ACK:
3588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
3589 data_size = send_core_path_ack (queue->cls, size, buf);
3593 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3594 "* type unknown: %u\n",
3599 if (0 < drop_percent &&
3600 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
3602 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
3603 "Dropping message of type %s\n",
3604 GNUNET_MESH_DEBUG_M2S(queue->type));
3607 /* Free queue, but cls was freed by send_core_* */
3608 queue_destroy (queue, GNUNET_NO);
3610 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
3611 pid = ((struct GNUNET_MESH_Data *) buf)->pid;
3615 case GNUNET_MESSAGE_TYPE_MESH_UNICAST:
3616 t->next_fc.last_pid_sent = pid;
3617 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_UNICAST, GNUNET_YES);
3618 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3620 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3622 case GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN:
3623 t->prev_fc.last_pid_sent = pid;
3624 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3626 ntohl ( ((struct GNUNET_MESH_Data *) buf)->mid ) );
3627 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, GNUNET_NO);
3633 /* If more data in queue, send next */
3634 queue = queue_get_next (peer);
3637 struct GNUNET_PeerIdentity id;
3639 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
3640 GNUNET_PEER_resolve (peer->id, &id);
3641 peer->core_transmit =
3642 GNUNET_CORE_notify_transmit_ready(core_handle,
3645 GNUNET_TIME_UNIT_FOREVER_REL,
3651 if (peer->id == t->next_hop)
3653 else if (peer->id == t->prev_hop)
3658 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "id: %u, next: %u, prev: %u\n",
3659 peer->id, t->next_hop, t->prev_hop);
3662 if (NULL != peer->queue_head)
3664 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task && fc->queue_n > 0)
3666 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
3667 "* %s starting poll timeout\n",
3668 GNUNET_i2s (&my_full_id));
3670 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3676 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
3678 GNUNET_SCHEDULER_cancel (fc->poll_task);
3679 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
3682 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
3684 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
3687 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
3693 * @brief Queue and pass message to core when possible.
3695 * If type is payload (UNICAST, TO_ORIGIN) checks for queue status and
3696 * accounts for it. In case the queue is full, the message is dropped and
3699 * Otherwise, message is treated as internal and allowed to go regardless of
3702 * @param cls Closure (@c type dependant). It will be used by queue_send to
3703 * build the message to be sent if not already prebuilt.
3704 * @param type Type of the message, 0 for a raw message.
3705 * @param size Size of the message.
3706 * @param dst Neighbor to send message to.
3707 * @param t Tunnel this message belongs to.
3710 queue_add (void *cls, uint16_t type, size_t size,
3711 struct MeshPeerInfo *dst, struct MeshTunnel *t)
3713 struct MeshPeerQueue *queue;
3714 struct GNUNET_PeerIdentity id;
3715 struct MeshFlowControl *fc;
3719 priority = GNUNET_NO;
3720 if (GNUNET_MESSAGE_TYPE_MESH_UNICAST == type)
3724 else if (GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type)
3730 if (fc->queue_n >= t->queue_max)
3732 /* If this isn't a retransmission, drop the message */
3733 if (GNUNET_NO == t->reliable ||
3734 (NULL == t->owner && GNUNET_MESSAGE_TYPE_MESH_UNICAST == type) ||
3735 (NULL == t->client && GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN == type))
3737 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
3740 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3741 "queue full: %u/%u\n",
3742 fc->queue_n, t->queue_max);
3743 return; /* Drop this message */
3745 priority = GNUNET_YES;
3748 if (GMC_is_pid_bigger(fc->last_pid_sent + 1, fc->last_ack_recv) &&
3749 GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
3750 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
3754 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
3760 if (GNUNET_YES == priority)
3762 struct GNUNET_MESH_Data *d;
3766 GNUNET_CONTAINER_DLL_insert (dst->queue_head, dst->queue_tail, queue);
3767 d = (struct GNUNET_MESH_Data *) queue->cls;
3769 for (queue = dst->queue_tail; NULL != queue; queue = queue->prev)
3771 if (queue->type != type)
3773 d = (struct GNUNET_MESH_Data *) queue->cls;
3780 GNUNET_CONTAINER_DLL_insert_tail (dst->queue_head, dst->queue_tail, queue);
3782 if (NULL == dst->core_transmit)
3784 GNUNET_PEER_resolve (dst->id, &id);
3785 dst->core_transmit =
3786 GNUNET_CORE_notify_transmit_ready (core_handle,
3789 GNUNET_TIME_UNIT_FOREVER_REL,
3795 t->pending_messages++;
3799 /******************************************************************************/
3800 /******************** MESH NETWORK HANDLERS **************************/
3801 /******************************************************************************/
3805 * Core handler for path creation
3807 * @param cls closure
3808 * @param message message
3809 * @param peer peer identity this notification is about
3811 * @return GNUNET_OK to keep the connection open,
3812 * GNUNET_SYSERR to close it (signal serious error)
3815 handle_mesh_path_create (void *cls, const struct GNUNET_PeerIdentity *peer,
3816 const struct GNUNET_MessageHeader *message)
3818 unsigned int own_pos;
3821 MESH_TunnelNumber tid;
3822 struct GNUNET_MESH_CreateTunnel *msg;
3823 struct GNUNET_PeerIdentity *pi;
3824 struct MeshPeerPath *path;
3825 struct MeshPeerInfo *dest_peer_info;
3826 struct MeshPeerInfo *orig_peer_info;
3827 struct MeshTunnel *t;
3829 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3830 "Received a path create msg [%s]\n",
3831 GNUNET_i2s (&my_full_id));
3832 size = ntohs (message->size);
3833 if (size < sizeof (struct GNUNET_MESH_CreateTunnel))
3835 GNUNET_break_op (0);
3839 size -= sizeof (struct GNUNET_MESH_CreateTunnel);
3840 if (size % sizeof (struct GNUNET_PeerIdentity))
3842 GNUNET_break_op (0);
3845 size /= sizeof (struct GNUNET_PeerIdentity);
3848 GNUNET_break_op (0);
3851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
3852 msg = (struct GNUNET_MESH_CreateTunnel *) message;
3854 tid = ntohl (msg->tid);
3855 pi = (struct GNUNET_PeerIdentity *) &msg[1];
3856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3857 " path is for tunnel %s[%X].\n", GNUNET_i2s (pi), tid);
3858 t = tunnel_get (pi, tid);
3859 if (NULL == t) /* might be a local tunnel */
3863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating tunnel\n");
3864 t = tunnel_new (GNUNET_PEER_intern (pi), tid, NULL, 0);
3870 t->port = ntohl (msg->port);
3871 opt = ntohl (msg->opt);
3872 if (0 != (opt & GNUNET_MESH_OPTION_NOBUFFER))
3874 t->nobuffer = GNUNET_YES;
3877 if (0 != (opt & GNUNET_MESH_OPTION_RELIABLE))
3879 t->reliable = GNUNET_YES;
3881 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " nobuffer:%d\n", t->nobuffer);
3883 tunnel_reset_timeout (t, GNUNET_YES);
3884 tunnel_change_state (t, MESH_TUNNEL_WAITING);
3886 GNUNET_CONTAINER_multihashmap_get (peers, &pi[size - 1].hashPubKey);
3887 if (NULL == dest_peer_info)
3889 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3890 " Creating PeerInfo for destination.\n");
3891 dest_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3892 dest_peer_info->id = GNUNET_PEER_intern (&pi[size - 1]);
3893 GNUNET_CONTAINER_multihashmap_put (peers, &pi[size - 1].hashPubKey,
3895 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3897 orig_peer_info = GNUNET_CONTAINER_multihashmap_get (peers, &pi->hashPubKey);
3898 if (NULL == orig_peer_info)
3900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3901 " Creating PeerInfo for origin.\n");
3902 orig_peer_info = GNUNET_malloc (sizeof (struct MeshPeerInfo));
3903 orig_peer_info->id = GNUNET_PEER_intern (pi);
3904 GNUNET_CONTAINER_multihashmap_put (peers, &pi->hashPubKey, orig_peer_info,
3905 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
3907 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
3908 path = path_new (size);
3910 for (i = 0; i < size; i++)
3912 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
3913 GNUNET_i2s (&pi[i]));
3914 path->peers[i] = GNUNET_PEER_intern (&pi[i]);
3915 if (path->peers[i] == myid)
3918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
3919 if (own_pos == 0 && path->peers[own_pos] != myid)
3921 /* create path: self not found in path through self */
3922 GNUNET_break_op (0);
3923 path_destroy (path);
3927 path_add_to_peers (path, GNUNET_NO);
3928 tunnel_use_path (t, path);
3930 peer_info_add_tunnel (dest_peer_info, t);
3932 if (own_pos == size - 1)
3934 struct MeshClient *c;
3936 /* Find target client */
3937 c = GNUNET_CONTAINER_multihashmap32_get (ports, t->port);
3940 /* TODO send reject */
3944 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
3945 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_YES);
3947 /* Assign local tid */
3948 while (NULL != tunnel_get_incoming (next_local_tid))
3949 next_local_tid = (next_local_tid + 1) | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3950 t->local_tid_dest = next_local_tid++;
3951 next_local_tid = next_local_tid | GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
3953 if (GNUNET_YES == t->reliable)
3955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
3956 t->bck_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
3958 t->bck_rel->expected_delay = MESH_RETRANSMIT_TIME;
3961 tunnel_add_client (t, c);
3962 send_local_tunnel_create (t);
3964 /* Eliminate tunnel when origin dies */
3965 tunnel_reset_timeout (t, GNUNET_YES);
3966 /* Keep tunnel alive in direction dest->owner*/
3967 tunnel_reset_timeout (t, GNUNET_NO);
3971 struct MeshPeerPath *path2;
3973 t->next_hop = path->peers[own_pos + 1];
3974 GNUNET_PEER_change_rc(t->next_hop, 1);
3976 /* It's for somebody else! Retransmit. */
3977 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
3978 path2 = path_duplicate (path);
3979 peer_info_add_path (dest_peer_info, path2, GNUNET_NO);
3980 peer_info_add_path_to_origin (orig_peer_info, path, GNUNET_NO);
3981 send_path_create (t);
3989 * Core handler for path ACKs
3991 * @param cls closure
3992 * @param message message
3993 * @param peer peer identity this notification is about
3995 * @return GNUNET_OK to keep the connection open,
3996 * GNUNET_SYSERR to close it (signal serious error)
3999 handle_mesh_path_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4000 const struct GNUNET_MessageHeader *message)
4002 struct GNUNET_MESH_PathACK *msg;
4003 struct MeshPeerInfo *peer_info;
4004 struct MeshPeerPath *p;
4005 struct MeshTunnel *t;
4007 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a path ACK msg [%s]\n",
4008 GNUNET_i2s (&my_full_id));
4009 msg = (struct GNUNET_MESH_PathACK *) message;
4010 t = tunnel_get (&msg->oid, ntohl(msg->tid));
4013 /* TODO notify that we don't know the tunnel */
4014 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel", 1, GNUNET_NO);
4015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the tunnel %s [%X]!\n",
4016 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4019 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %s [%X]\n",
4020 GNUNET_i2s (&msg->oid), ntohl(msg->tid));
4022 peer_info = peer_get (&msg->peer_id);
4023 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by peer %s\n",
4024 GNUNET_i2s (&msg->peer_id));
4025 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
4028 /* Add path to peers? */
4032 path_add_to_peers (p, GNUNET_YES);
4038 tunnel_change_state (t, MESH_TUNNEL_READY);
4039 tunnel_reset_timeout (t, GNUNET_NO);
4040 t->next_fc.last_ack_recv = (NULL == t->client) ? ntohl (msg->ack) : 0;
4041 t->prev_fc.last_ack_sent = ntohl (msg->ack);
4043 /* Message for us? */
4044 if (0 == memcmp (&msg->oid, &my_full_id, sizeof (struct GNUNET_PeerIdentity)))
4046 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
4047 if (NULL == t->owner)
4049 GNUNET_break_op (0);
4052 if (NULL != peer_info->dhtget)
4054 GNUNET_DHT_get_stop (peer_info->dhtget);
4055 peer_info->dhtget = NULL;
4057 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_YES);
4058 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK, GNUNET_NO);
4062 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4063 " not for us, retransmitting...\n");
4064 send_prebuilt_message (message, t->prev_hop, t);
4070 * Core handler for notifications of broken paths
4072 * @param cls closure
4073 * @param message message
4074 * @param peer peer identity this notification is about
4076 * @return GNUNET_OK to keep the connection open,
4077 * GNUNET_SYSERR to close it (signal serious error)
4080 handle_mesh_path_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
4081 const struct GNUNET_MessageHeader *message)
4083 struct GNUNET_MESH_PathBroken *msg;
4084 struct MeshTunnel *t;
4086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4087 "Received a PATH BROKEN msg from %s\n", GNUNET_i2s (peer));
4088 msg = (struct GNUNET_MESH_PathBroken *) message;
4089 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4090 GNUNET_i2s (&msg->peer1));
4091 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
4092 GNUNET_i2s (&msg->peer2));
4093 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4096 GNUNET_break_op (0);
4099 tunnel_notify_connection_broken (t, GNUNET_PEER_search (&msg->peer1),
4100 GNUNET_PEER_search (&msg->peer2));
4107 * Core handler for tunnel destruction
4109 * @param cls closure
4110 * @param message message
4111 * @param peer peer identity this notification is about
4113 * @return GNUNET_OK to keep the connection open,
4114 * GNUNET_SYSERR to close it (signal serious error)
4117 handle_mesh_tunnel_destroy (void *cls, const struct GNUNET_PeerIdentity *peer,
4118 const struct GNUNET_MessageHeader *message)
4120 struct GNUNET_MESH_TunnelDestroy *msg;
4121 struct MeshTunnel *t;
4123 msg = (struct GNUNET_MESH_TunnelDestroy *) message;
4124 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4125 "Got a TUNNEL DESTROY packet from %s\n",
4127 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4128 " for tunnel %s [%u]\n",
4129 GNUNET_i2s (&msg->oid), ntohl (msg->tid));
4130 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4133 /* Probably already got the message from another path,
4134 * destroyed the tunnel and retransmitted to children.
4137 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
4141 if (t->local_tid_dest >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
4143 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "INCOMING TUNNEL %X %X\n",
4144 t->local_tid, t->local_tid_dest);
4146 if (GNUNET_PEER_search (peer) == t->prev_hop)
4148 // TODO check owner's signature
4149 // TODO add owner's signatue to tunnel for retransmission
4150 peer_cancel_queues (t->prev_hop, t);
4151 GNUNET_PEER_change_rc (t->prev_hop, -1);
4154 else if (GNUNET_PEER_search (peer) == t->next_hop)
4156 // TODO check dest's signature
4157 // TODO add dest's signatue to tunnel for retransmission
4158 peer_cancel_queues (t->next_hop, t);
4159 GNUNET_PEER_change_rc (t->next_hop, -1);
4164 GNUNET_break_op (0);
4165 // TODO check both owner AND destination's signature to see which matches
4166 // TODO restransmit in appropriate direction
4169 tunnel_destroy_empty (t);
4171 // TODO: add timeout to destroy the tunnel anyway
4177 * Generic handler for mesh network payload traffic.
4179 * @param peer Peer identity this notification is about.
4180 * @param message Data message.
4181 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
4183 * @return GNUNET_OK to keep the connection open,
4184 * GNUNET_SYSERR to close it (signal serious error)
4187 handle_mesh_data (const struct GNUNET_PeerIdentity *peer,
4188 const struct GNUNET_MessageHeader *message,
4191 struct GNUNET_MESH_Data *msg;
4192 struct MeshFlowControl *fc;
4193 struct MeshTunnelReliability *rel;
4194 struct MeshTunnel *t;
4195 struct MeshClient *c;
4203 size = ntohs (message->size);
4205 sizeof (struct GNUNET_MESH_Data) +
4206 sizeof (struct GNUNET_MessageHeader))
4211 type =ntohs (message->type);
4212 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
4213 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4214 msg = (struct GNUNET_MESH_Data *) message;
4215 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
4216 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
4218 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4221 /* TODO notify back: we don't know this tunnel */
4222 GNUNET_STATISTICS_update (stats, "# data on unknown tunnel", 1, GNUNET_NO);
4223 GNUNET_break_op (0);
4227 /* Initialize FWD/BCK data */
4228 pid = ntohl (msg->pid);
4229 fc = fwd ? &t->prev_fc : &t->next_fc;
4230 c = fwd ? t->client : t->owner;
4231 rel = fwd ? t->bck_rel : t->fwd_rel;
4232 hop = fwd ? t->next_hop : t->prev_hop;
4233 if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
4235 GNUNET_STATISTICS_update (stats, "# unsolicited data", 1, GNUNET_NO);
4236 GNUNET_break_op (0);
4237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4238 "Received PID %u, (prev %u), ACK %u\n",
4239 pid, fc->last_pid_recv, fc->last_ack_sent);
4243 tunnel_change_state (t, MESH_TUNNEL_READY);
4244 tunnel_reset_timeout (t, fwd);
4247 /* TODO signature verification */
4248 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " it's for us! sending to client\n");
4249 GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
4250 if (GMC_is_pid_bigger (pid, fc->last_pid_recv))
4254 mid = ntohl (msg->mid);
4255 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4256 " pid %u (mid %u) not seen yet\n", pid, mid);
4257 fc->last_pid_recv = pid;
4259 if (GNUNET_NO == t->reliable ||
4260 ( !GMC_is_pid_bigger (rel->mid_recv, mid) &&
4261 GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) )
4263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4264 "!!! RECV %u\n", ntohl (msg->mid));
4265 if (GNUNET_YES == t->reliable)
4267 /* Is this the exact next expected messasge? */
4268 if (mid == rel->mid_recv)
4270 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
4272 tunnel_send_client_data (t, msg, fwd);
4273 tunnel_send_client_buffered_data (t, c, rel);
4277 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
4278 tunnel_add_buffered_data (t, msg, rel);
4281 else /* Tunnel unreliable, send to clients directly */
4283 tunnel_send_client_data (t, msg, fwd);
4288 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4289 " MID %u not expected (%u - %u), dropping!\n",
4290 ntohl (msg->mid), rel->mid_recv, rel->mid_recv + 64);
4295 // GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
4296 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4297 " Pid %u not expected (%u+), dropping!\n",
4298 pid, fc->last_pid_recv + 1);
4300 tunnel_send_ack (t, type, fwd);
4303 fc->last_pid_recv = pid;
4306 GNUNET_STATISTICS_update (stats, "# data on dying tunnel", 1, GNUNET_NO);
4307 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "data on dying tunnel %s[%X]\n",
4308 GNUNET_PEER_resolve2 (t->id.oid), ntohl (msg->tid));
4309 return GNUNET_OK; /* Next hop has destoyed the tunnel, drop */
4311 ttl = ntohl (msg->ttl);
4312 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
4315 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
4316 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
4317 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, fwd);
4323 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
4324 send_prebuilt_message (message, hop, t);
4325 GNUNET_STATISTICS_update (stats, "# unicast forwarded", 1, GNUNET_NO);
4332 * Core handler for mesh network traffic going from the origin to a peer
4334 * @param cls Closure (unused).
4335 * @param message Message received.
4336 * @param peer Peer who sent the message.
4338 * @return GNUNET_OK to keep the connection open,
4339 * GNUNET_SYSERR to close it (signal serious error)
4342 handle_mesh_unicast (void *cls, const struct GNUNET_PeerIdentity *peer,
4343 const struct GNUNET_MessageHeader *message)
4345 return handle_mesh_data (peer, message, GNUNET_YES);
4349 * Core handler for mesh network traffic towards the owner of a tunnel.
4351 * @param cls Closure (unused).
4352 * @param message Message received.
4353 * @param peer Peer who sent the message.
4355 * @return GNUNET_OK to keep the connection open,
4356 * GNUNET_SYSERR to close it (signal serious error)
4359 handle_mesh_to_orig (void *cls, const struct GNUNET_PeerIdentity *peer,
4360 const struct GNUNET_MessageHeader *message)
4362 return handle_mesh_data (peer, message, GNUNET_NO);
4367 * Core handler for mesh network traffic end-to-end ACKs.
4369 * @param cls Closure.
4370 * @param message Message.
4371 * @param peer Peer identity this notification is about.
4373 * @return GNUNET_OK to keep the connection open,
4374 * GNUNET_SYSERR to close it (signal serious error)
4377 handle_mesh_data_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4378 const struct GNUNET_MessageHeader *message)
4380 struct GNUNET_MESH_DataACK *msg;
4381 struct MeshTunnelReliability *rel;
4382 struct MeshReliableMessage *copy;
4383 struct MeshReliableMessage *next;
4384 struct MeshTunnel *t;
4390 type = ntohs (message->type);
4391 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message from %s!\n",
4392 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
4393 msg = (struct GNUNET_MESH_DataACK *) message;
4395 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4398 /* TODO notify that we dont know this tunnel (whom)? */
4399 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4402 ack = ntohl (msg->mid);
4403 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4405 /* Is this a forward or backward ACK? */
4406 id = GNUNET_PEER_search (peer);
4407 if (t->next_hop == id && GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type)
4409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4410 if (NULL == t->owner)
4412 send_prebuilt_message (message, t->prev_hop, t);
4417 else if (t->prev_hop == id && GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK == type)
4419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4420 if (NULL == t->client)
4422 send_prebuilt_message (message, t->next_hop, t);
4429 GNUNET_break_op (0);
4433 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ACK %u\n", ack);
4434 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
4436 if (GMC_is_pid_bigger (copy->mid, ack))
4438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
4439 tunnel_free_sent_reliable (t, msg, rel);
4443 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
4445 tunnel_free_reliable_message (copy);
4447 /* Once buffers have been free'd, send ACK */
4448 tunnel_send_ack (t, type, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type);
4450 /* If some message was free'd, update the retransmission delay*/
4451 if (GNUNET_YES == work)
4453 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
4455 GNUNET_SCHEDULER_cancel (rel->retry_task);
4456 if (NULL == rel->head_sent)
4458 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
4462 struct GNUNET_TIME_Absolute new_target;
4463 struct GNUNET_TIME_Relative delay;
4465 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
4466 MESH_RETRANSMIT_MARGIN);
4467 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
4469 delay = GNUNET_TIME_absolute_get_remaining (new_target);
4471 GNUNET_SCHEDULER_add_delayed (delay,
4472 &tunnel_retransmit_message,
4483 * Core handler for mesh network traffic point-to-point acks.
4485 * @param cls closure
4486 * @param message message
4487 * @param peer peer identity this notification is about
4489 * @return GNUNET_OK to keep the connection open,
4490 * GNUNET_SYSERR to close it (signal serious error)
4493 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
4494 const struct GNUNET_MessageHeader *message)
4496 struct GNUNET_MESH_ACK *msg;
4497 struct MeshTunnel *t;
4498 struct MeshFlowControl *fc;
4502 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
4504 msg = (struct GNUNET_MESH_ACK *) message;
4506 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4510 /* TODO notify that we dont know this tunnel (whom)? */
4511 GNUNET_STATISTICS_update (stats, "# ack on unknown tunnel", 1, GNUNET_NO);
4514 ack = ntohl (msg->pid);
4515 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
4517 /* Is this a forward or backward ACK? */
4518 id = GNUNET_PEER_search (peer);
4519 if (t->next_hop == id)
4521 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
4524 else if (t->prev_hop == id)
4526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
4531 GNUNET_break_op (0);
4535 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
4536 GMC_is_pid_bigger (ack, fc->last_ack_recv))
4538 GNUNET_SCHEDULER_cancel (fc->poll_task);
4539 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4540 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4543 fc->last_ack_recv = ack;
4544 peer_unlock_queue (id);
4545 tunnel_change_state (t, MESH_TUNNEL_READY);
4547 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_ACK, t->next_hop == id);
4554 * Core handler for mesh network traffic point-to-point ack polls.
4556 * @param cls closure
4557 * @param message message
4558 * @param peer peer identity this notification is about
4560 * @return GNUNET_OK to keep the connection open,
4561 * GNUNET_SYSERR to close it (signal serious error)
4564 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
4565 const struct GNUNET_MessageHeader *message)
4567 struct GNUNET_MESH_Poll *msg;
4568 struct MeshTunnel *t;
4569 struct MeshFlowControl *fc;
4574 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an POLL packet from %s!\n",
4577 msg = (struct GNUNET_MESH_Poll *) message;
4579 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4583 /* TODO notify that we dont know this tunnel (whom)? */
4584 GNUNET_STATISTICS_update (stats, "# poll on unknown tunnel", 1, GNUNET_NO);
4585 GNUNET_break_op (0);
4589 /* Is this a forward or backward ACK? */
4590 id = GNUNET_PEER_search (peer);
4591 pid = ntohl (msg->pid);
4592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u\n", pid);
4593 if (t->next_hop == id)
4595 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from FWD\n");
4597 old = fc->last_pid_recv;
4599 else if (t->prev_hop == id)
4601 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " from BCK\n");
4603 old = fc->last_pid_recv;
4611 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " was %u\n", fc->last_pid_recv);
4612 fc->last_pid_recv = pid;
4613 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_POLL, t->prev_hop == id);
4615 if (GNUNET_YES == t->reliable)
4616 fc->last_pid_recv = old;
4623 * Core handler for mesh keepalives.
4625 * @param cls closure
4626 * @param message message
4627 * @param peer peer identity this notification is about
4628 * @return GNUNET_OK to keep the connection open,
4629 * GNUNET_SYSERR to close it (signal serious error)
4631 * TODO: Check who we got this from, to validate route.
4634 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
4635 const struct GNUNET_MessageHeader *message)
4637 struct GNUNET_MESH_TunnelKeepAlive *msg;
4638 struct MeshTunnel *t;
4639 struct MeshClient *c;
4643 msg = (struct GNUNET_MESH_TunnelKeepAlive *) message;
4644 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
4647 t = tunnel_get (&msg->oid, ntohl (msg->tid));
4650 /* TODO notify that we dont know that tunnel */
4651 GNUNET_STATISTICS_update (stats, "# keepalive on unknown tunnel", 1,
4656 fwd = GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE == ntohs (message->type) ?
4657 GNUNET_YES : GNUNET_NO;
4658 c = fwd ? t->client : t->owner;
4659 hop = fwd ? t->next_hop : t->prev_hop;
4662 tunnel_change_state (t, MESH_TUNNEL_READY);
4663 tunnel_reset_timeout (t, fwd);
4664 if (NULL != c || 0 == hop || myid == hop)
4667 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
4668 send_prebuilt_message (message, hop, t);
4675 * Functions to handle messages from core
4677 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
4678 {&handle_mesh_path_create, GNUNET_MESSAGE_TYPE_MESH_PATH_CREATE, 0},
4679 {&handle_mesh_path_broken, GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN,
4680 sizeof (struct GNUNET_MESH_PathBroken)},
4681 {&handle_mesh_tunnel_destroy, GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY,
4682 sizeof (struct GNUNET_MESH_TunnelDestroy)},
4683 {&handle_mesh_unicast, GNUNET_MESSAGE_TYPE_MESH_UNICAST, 0},
4684 {&handle_mesh_to_orig, GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN, 0},
4685 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK,
4686 sizeof (struct GNUNET_MESH_DataACK)},
4687 {&handle_mesh_data_ack, GNUNET_MESSAGE_TYPE_MESH_TO_ORIG_ACK,
4688 sizeof (struct GNUNET_MESH_DataACK)},
4689 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE,
4690 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4691 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE,
4692 sizeof (struct GNUNET_MESH_TunnelKeepAlive)},
4693 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
4694 sizeof (struct GNUNET_MESH_ACK)},
4695 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
4696 sizeof (struct GNUNET_MESH_Poll)},
4697 {&handle_mesh_path_ack, GNUNET_MESSAGE_TYPE_MESH_PATH_ACK,
4698 sizeof (struct GNUNET_MESH_PathACK)},
4704 * Function to process paths received for a new peer addition. The recorded
4705 * paths form the initial tunnel, which can be optimized later.
4706 * Called on each result obtained for the DHT search.
4708 * @param cls closure
4709 * @param exp when will this value expire
4710 * @param key key of the result
4711 * @param get_path path of the get request
4712 * @param get_path_length lenght of get_path
4713 * @param put_path path of the put request
4714 * @param put_path_length length of the put_path
4715 * @param type type of the result
4716 * @param size number of bytes in data
4717 * @param data pointer to the result data
4720 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
4721 const struct GNUNET_HashCode * key,
4722 const struct GNUNET_PeerIdentity *get_path,
4723 unsigned int get_path_length,
4724 const struct GNUNET_PeerIdentity *put_path,
4725 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
4726 size_t size, const void *data)
4728 struct MeshPeerInfo *peer = cls;
4729 struct MeshPeerPath *p;
4730 struct GNUNET_PeerIdentity pi;
4733 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
4734 GNUNET_PEER_resolve (peer->id, &pi);
4735 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
4737 p = path_build_from_dht (get_path, get_path_length,
4738 put_path, put_path_length);
4739 path_add_to_peers (p, GNUNET_NO);
4741 for (i = 0; i < peer->ntunnels; i++)
4743 struct GNUNET_PeerIdentity id;
4745 GNUNET_PEER_resolve (peer->tunnels[i]->id.oid, &id);
4746 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... tunnel %s:%X (%X / %X)\n",
4747 GNUNET_i2s (&id), peer->tunnels[i]->id.tid,
4748 peer->tunnels[i]->local_tid,
4749 peer->tunnels[i]->local_tid_dest);
4750 if (peer->tunnels[i]->state == MESH_TUNNEL_SEARCHING)
4752 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
4753 peer_connect (peer, peer->tunnels[i]);
4761 /******************************************************************************/
4762 /********************* MESH LOCAL HANDLES **************************/
4763 /******************************************************************************/
4767 * Handler for client connection.
4769 * @param cls Closure (unused).
4770 * @param client Client handler.
4773 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
4775 struct MeshClient *c;
4779 c = GNUNET_malloc (sizeof (struct MeshClient));
4781 GNUNET_SERVER_client_keep (client);
4782 GNUNET_SERVER_client_set_user_context (client, c);
4783 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
4788 * Handler for client disconnection
4790 * @param cls closure
4791 * @param client identification of the client; NULL
4792 * for the last call when the server is destroyed
4795 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
4797 struct MeshClient *c;
4798 struct MeshClient *next;
4800 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
4803 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
4807 c = client_get (client);
4810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u)\n",
4812 GNUNET_SERVER_client_drop (c->handle);
4813 c->shutting_down = GNUNET_YES;
4814 if (NULL != c->own_tunnels)
4816 GNUNET_CONTAINER_multihashmap32_iterate (c->own_tunnels,
4817 &tunnel_destroy_iterator, c);
4818 GNUNET_CONTAINER_multihashmap32_destroy (c->own_tunnels);
4821 if (NULL != c->incoming_tunnels)
4823 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_tunnels,
4824 &tunnel_destroy_iterator, c);
4825 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_tunnels);
4828 if (NULL != c->ports)
4829 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
4831 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
4832 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " CLIENT FREE at %p\n", c);
4834 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
4839 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
4841 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
4847 * Handler for new clients
4849 * @param cls closure
4850 * @param client identification of the client
4851 * @param message the actual message, which includes messages the client wants
4854 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
4855 const struct GNUNET_MessageHeader *message)
4857 struct GNUNET_MESH_ClientConnect *cc_msg;
4858 struct MeshClient *c;
4863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
4865 /* Check data sanity */
4866 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
4867 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
4868 if (0 != (size % sizeof (uint32_t)))
4871 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4874 size /= sizeof (uint32_t);
4876 /* Initialize new client structure */
4877 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
4878 c->id = next_client_id++; /* overflow not important: just for debug */
4879 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
4880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
4885 p = (uint32_t *) &cc_msg[1];
4886 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
4887 for (i = 0; i < size; i++)
4890 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
4892 /* store in client's hashmap */
4893 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
4894 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4895 /* store in global hashmap */
4896 /* FIXME only allow one client to have the port open,
4897 * have a backup hashmap with waiting clients */
4898 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
4899 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
4903 c->own_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4904 c->incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
4905 GNUNET_SERVER_notification_context_add (nc, client);
4906 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
4908 GNUNET_SERVER_receive_done (client, GNUNET_OK);
4909 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
4914 * Handler for requests of new tunnels
4916 * @param cls Closure.
4917 * @param client Identification of the client.
4918 * @param message The actual message.
4921 handle_local_tunnel_create (void *cls, struct GNUNET_SERVER_Client *client,
4922 const struct GNUNET_MessageHeader *message)
4924 struct GNUNET_MESH_TunnelMessage *t_msg;
4925 struct MeshPeerInfo *peer_info;
4926 struct MeshTunnel *t;
4927 struct MeshClient *c;
4928 MESH_TunnelNumber tid;
4930 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new tunnel requested\n");
4932 /* Sanity check for client registration */
4933 if (NULL == (c = client_get (client)))
4936 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4939 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
4941 /* Message size sanity check */
4942 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
4945 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4949 t_msg = (struct GNUNET_MESH_TunnelMessage *) message;
4950 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s\n",
4951 GNUNET_i2s (&t_msg->peer));
4952 /* Sanity check for tunnel numbering */
4953 tid = ntohl (t_msg->tunnel_id);
4954 if (0 == (tid & GNUNET_MESH_LOCAL_TUNNEL_ID_CLI))
4957 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4960 /* Sanity check for duplicate tunnel IDs */
4961 if (NULL != tunnel_get_by_local_id (c, tid))
4964 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4969 while (NULL != tunnel_get_by_pi (myid, next_tid))
4970 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4971 t = tunnel_new (myid, next_tid, c, tid);
4972 next_tid = (next_tid + 1) & ~GNUNET_MESH_LOCAL_TUNNEL_ID_CLI;
4976 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
4979 t->port = ntohl (t_msg->port);
4980 tunnel_set_options (t, ntohl (t_msg->opt));
4981 if (GNUNET_YES == t->reliable)
4983 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
4984 t->fwd_rel = GNUNET_malloc (sizeof (struct MeshTunnelReliability));
4986 t->fwd_rel->expected_delay = MESH_RETRANSMIT_TIME;
4989 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED TUNNEL %s[%x]:%u (%x)\n",
4990 GNUNET_i2s (&my_full_id), t->id.tid, t->port, t->local_tid);
4992 peer_info = peer_get (&t_msg->peer);
4993 peer_info_add_tunnel (peer_info, t);
4994 peer_connect (peer_info, t);
4995 tunnel_reset_timeout (t, GNUNET_YES);
4996 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5002 * Handler for requests of deleting tunnels
5004 * @param cls closure
5005 * @param client identification of the client
5006 * @param message the actual message
5009 handle_local_tunnel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
5010 const struct GNUNET_MessageHeader *message)
5012 struct GNUNET_MESH_TunnelMessage *tunnel_msg;
5013 struct MeshClient *c;
5014 struct MeshTunnel *t;
5015 MESH_TunnelNumber tid;
5017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5018 "Got a DESTROY TUNNEL from client!\n");
5020 /* Sanity check for client registration */
5021 if (NULL == (c = client_get (client)))
5024 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5027 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5029 /* Message sanity check */
5030 if (sizeof (struct GNUNET_MESH_TunnelMessage) != ntohs (message->size))
5033 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5037 tunnel_msg = (struct GNUNET_MESH_TunnelMessage *) message;
5039 /* Retrieve tunnel */
5040 tid = ntohl (tunnel_msg->tunnel_id);
5041 t = tunnel_get_by_local_id(c, tid);
5044 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " tunnel %X not found\n", tid);
5046 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5050 /* Cleanup after the tunnel */
5051 client_delete_tunnel (c, t);
5058 peer_info_remove_tunnel (peer_get_short (t->dest), t);
5062 /* The tunnel will be destroyed when the last message is transmitted. */
5063 tunnel_destroy_empty (t);
5065 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5071 * Handler for client traffic
5073 * @param cls closure
5074 * @param client identification of the client
5075 * @param message the actual message
5078 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
5079 const struct GNUNET_MessageHeader *message)
5081 struct GNUNET_MESH_LocalData *data_msg;
5082 struct MeshClient *c;
5083 struct MeshTunnel *t;
5084 struct MeshFlowControl *fc;
5085 MESH_TunnelNumber tid;
5088 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5089 "Got data from a client!\n");
5091 /* Sanity check for client registration */
5092 if (NULL == (c = client_get (client)))
5095 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5098 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5100 data_msg = (struct GNUNET_MESH_LocalData *) message;
5102 /* Sanity check for message size */
5103 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
5104 if (size < sizeof (struct GNUNET_MessageHeader))
5107 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5111 /* Tunnel exists? */
5112 tid = ntohl (data_msg->tid);
5113 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_CLI)
5116 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5119 t = tunnel_get_by_local_id (c, tid);
5123 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5127 /* Is the client in the tunnel? */
5128 if ( !( (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5130 t->owner->handle == client)
5132 (tid >= GNUNET_MESH_LOCAL_TUNNEL_ID_SERV &&
5134 t->client->handle == client) ) )
5137 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5141 /* Ok, everything is correct, send the message
5142 * (pretend we got it from a mesh peer)
5145 struct GNUNET_MESH_Data *payload;
5146 char cbuf[sizeof(struct GNUNET_MESH_Data) + size];
5148 fc = tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ? &t->prev_fc : &t->next_fc;
5149 if (GNUNET_YES == t->reliable)
5151 struct MeshTunnelReliability *rel;
5152 struct MeshReliableMessage *copy;
5154 rel = (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV) ? t->fwd_rel : t->bck_rel;
5155 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage)
5156 + sizeof(struct GNUNET_MESH_Data)
5158 copy->mid = rel->mid_sent++;
5159 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! DATA %u\n", copy->mid);
5160 copy->timestamp = GNUNET_TIME_absolute_get ();
5163 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
5164 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
5165 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
5168 GNUNET_TIME_relative_multiply (rel->expected_delay,
5169 MESH_RETRANSMIT_MARGIN);
5171 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
5172 &tunnel_retransmit_message,
5175 payload = (struct GNUNET_MESH_Data *) ©[1];
5176 payload->mid = htonl (copy->mid);
5180 payload = (struct GNUNET_MESH_Data *) cbuf;
5181 payload->mid = htonl (fc->last_pid_recv + 1);
5183 memcpy (&payload[1], &data_msg[1], size);
5184 payload->header.size = htons (sizeof (struct GNUNET_MESH_Data) + size);
5185 payload->header.type = htons (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV ?
5186 GNUNET_MESSAGE_TYPE_MESH_UNICAST :
5187 GNUNET_MESSAGE_TYPE_MESH_TO_ORIGIN);
5188 GNUNET_PEER_resolve(t->id.oid, &payload->oid);;
5189 payload->tid = htonl (t->id.tid);
5190 payload->ttl = htonl (default_ttl);
5191 payload->pid = htonl (fc->last_pid_recv + 1);
5192 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5193 " calling generic handler...\n");
5194 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5195 handle_mesh_unicast (NULL, &my_full_id, &payload->header);
5197 handle_mesh_to_orig (NULL, &my_full_id, &payload->header);
5199 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
5200 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5207 * Handler for client's ACKs for payload traffic.
5209 * @param cls Closure (unused).
5210 * @param client Identification of the client.
5211 * @param message The actual message.
5214 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
5215 const struct GNUNET_MessageHeader *message)
5217 struct GNUNET_MESH_LocalAck *msg;
5218 struct MeshTunnel *t;
5219 struct MeshClient *c;
5220 MESH_TunnelNumber tid;
5222 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
5223 /* Sanity check for client registration */
5224 if (NULL == (c = client_get (client)))
5227 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5230 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
5232 msg = (struct GNUNET_MESH_LocalAck *) message;
5234 /* Tunnel exists? */
5235 tid = ntohl (msg->tunnel_id);
5236 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on tunnel %X\n", tid);
5237 t = tunnel_get_by_local_id (c, tid);
5241 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Tunnel %X unknown.\n", tid);
5242 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
5243 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5247 /* Does client own tunnel? I.E: Is this an ACK for BCK traffic? */
5248 if (tid < GNUNET_MESH_LOCAL_TUNNEL_ID_SERV)
5250 /* The client owns the tunnel, ACK is for data to_origin, send BCK ACK. */
5251 t->prev_fc.last_ack_recv++;
5252 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_NO);
5256 /* The client doesn't own the tunnel, this ACK is for FWD traffic. */
5257 t->next_fc.last_ack_recv++;
5258 tunnel_send_ack (t, GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK, GNUNET_YES);
5261 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5269 * Iterator over all tunnels to send a monitoring client info about each tunnel.
5271 * @param cls Closure (client handle).
5272 * @param key Key (hashed tunnel ID, unused).
5273 * @param value Tunnel info.
5275 * @return GNUNET_YES, to keep iterating.
5278 monitor_all_tunnels_iterator (void *cls,
5279 const struct GNUNET_HashCode * key,
5282 struct GNUNET_SERVER_Client *client = cls;
5283 struct MeshTunnel *t = value;
5284 struct GNUNET_MESH_LocalMonitor *msg;
5286 msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
5287 GNUNET_PEER_resolve(t->id.oid, &msg->owner);
5288 msg->tunnel_id = htonl (t->id.tid);
5289 msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5290 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
5291 GNUNET_PEER_resolve (t->dest, &msg->destination);
5293 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5294 "* sending info about tunnel %s [%u]\n",
5295 GNUNET_i2s (&msg->owner), t->id.tid);
5297 GNUNET_SERVER_notification_context_unicast (nc, client,
5298 &msg->header, GNUNET_NO);
5304 * Handler for client's MONITOR request.
5306 * @param cls Closure (unused).
5307 * @param client Identification of the client.
5308 * @param message The actual message.
5311 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
5312 const struct GNUNET_MessageHeader *message)
5314 struct MeshClient *c;
5316 /* Sanity check for client registration */
5317 if (NULL == (c = client_get (client)))
5320 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5324 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5325 "Received get tunnels request from client %u\n",
5327 GNUNET_CONTAINER_multihashmap_iterate (tunnels,
5328 monitor_all_tunnels_iterator,
5330 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5331 "Get tunnels request from client %u completed\n",
5333 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5338 * Handler for client's MONITOR_TUNNEL request.
5340 * @param cls Closure (unused).
5341 * @param client Identification of the client.
5342 * @param message The actual message.
5345 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
5346 const struct GNUNET_MessageHeader *message)
5348 const struct GNUNET_MESH_LocalMonitor *msg;
5349 struct GNUNET_MESH_LocalMonitor *resp;
5350 struct MeshClient *c;
5351 struct MeshTunnel *t;
5353 /* Sanity check for client registration */
5354 if (NULL == (c = client_get (client)))
5357 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
5361 msg = (struct GNUNET_MESH_LocalMonitor *) message;
5362 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5363 "Received tunnel info request from client %u for tunnel %s[%X]\n",
5366 ntohl (msg->tunnel_id));
5367 t = tunnel_get (&msg->owner, ntohl (msg->tunnel_id));
5370 /* We don't know the tunnel FIXME */
5371 struct GNUNET_MESH_LocalMonitor warn;
5374 GNUNET_SERVER_notification_context_unicast (nc, client,
5377 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5381 /* Initialize context */
5382 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
5384 GNUNET_PEER_resolve (t->dest, &resp->destination);
5385 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
5386 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
5387 &resp->header, GNUNET_NO);
5390 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5391 "Monitor tunnel request from client %u completed\n",
5393 GNUNET_SERVER_receive_done (client, GNUNET_OK);
5398 * Functions to handle messages from clients
5400 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
5401 {&handle_local_new_client, NULL,
5402 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
5403 {&handle_local_tunnel_create, NULL,
5404 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE,
5405 sizeof (struct GNUNET_MESH_TunnelMessage)},
5406 {&handle_local_tunnel_destroy, NULL,
5407 GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY,
5408 sizeof (struct GNUNET_MESH_TunnelMessage)},
5409 {&handle_local_data, NULL,
5410 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
5411 {&handle_local_ack, NULL,
5412 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
5413 sizeof (struct GNUNET_MESH_LocalAck)},
5414 {&handle_local_get_tunnels, NULL,
5415 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
5416 sizeof (struct GNUNET_MessageHeader)},
5417 {&handle_local_show_tunnel, NULL,
5418 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
5419 sizeof (struct GNUNET_MESH_LocalMonitor)},
5425 * Method called whenever a given peer connects.
5427 * @param cls closure
5428 * @param peer peer identity this notification is about
5431 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
5433 struct MeshPeerInfo *peer_info;
5434 struct MeshPeerPath *path;
5436 DEBUG_CONN ("Peer connected\n");
5437 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
5438 peer_info = peer_get (peer);
5439 if (myid == peer_info->id)
5441 DEBUG_CONN (" (self)\n");
5442 path = path_new (1);
5446 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
5447 path = path_new (2);
5448 path->peers[1] = peer_info->id;
5449 GNUNET_PEER_change_rc (peer_info->id, 1);
5450 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
5452 path->peers[0] = myid;
5453 GNUNET_PEER_change_rc (myid, 1);
5454 peer_info_add_path (peer_info, path, GNUNET_YES);
5460 * Method called whenever a peer disconnects.
5462 * @param cls closure
5463 * @param peer peer identity this notification is about
5466 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
5468 struct MeshPeerInfo *pi;
5469 struct MeshPeerQueue *q;
5470 struct MeshPeerQueue *n;
5472 DEBUG_CONN ("Peer disconnected\n");
5473 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
5483 /* TODO try to reroute this traffic instead */
5484 queue_destroy(q, GNUNET_YES);
5487 if (NULL != pi->core_transmit)
5489 GNUNET_CORE_notify_transmit_ready_cancel(pi->core_transmit);
5490 pi->core_transmit = NULL;
5492 peer_info_remove_path (pi, pi->id, myid);
5495 DEBUG_CONN (" (self)\n");
5497 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
5503 * Install server (service) handlers and start listening to clients.
5508 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
5509 GNUNET_SERVER_connect_notify (server_handle,
5510 &handle_local_client_connect, NULL);
5511 GNUNET_SERVER_disconnect_notify (server_handle,
5512 &handle_local_client_disconnect, NULL);
5513 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
5515 clients_head = NULL;
5516 clients_tail = NULL;
5518 GNUNET_SERVER_resume (server_handle);
5523 * To be called on core init/fail.
5525 * @param cls Closure (config)
5526 * @param server handle to the server for this service
5527 * @param identity the public identity of this peer
5530 core_init (void *cls, struct GNUNET_CORE_Handle *server,
5531 const struct GNUNET_PeerIdentity *identity)
5533 const struct GNUNET_CONFIGURATION_Handle *c = cls;
5536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
5537 GNUNET_break (core_handle == server);
5538 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)) ||
5541 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
5542 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5544 GNUNET_i2s (identity));
5545 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5547 GNUNET_i2s (&my_full_id));
5548 GNUNET_CORE_disconnect (core_handle);
5549 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5550 NULL, /* Closure passed to MESH functions */
5551 &core_init, /* Call core_init once connected */
5552 &core_connect, /* Handle connects */
5553 &core_disconnect, /* remove peers on disconnects */
5554 NULL, /* Don't notify about all incoming messages */
5555 GNUNET_NO, /* For header only in notification */
5556 NULL, /* Don't notify about all outbound messages */
5557 GNUNET_NO, /* For header-only out notification */
5558 core_handlers); /* Register these handlers */
5567 /******************************************************************************/
5568 /************************ MAIN FUNCTIONS ****************************/
5569 /******************************************************************************/
5572 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
5574 * @param cls closure
5575 * @param key current key code
5576 * @param value value in the hash map
5577 * @return GNUNET_YES if we should continue to iterate,
5581 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
5583 struct MeshTunnel *t = value;
5590 * Iterator over peer hash map entries to destroy the tunnel during shutdown.
5592 * @param cls closure
5593 * @param key current key code
5594 * @param value value in the hash map
5595 * @return GNUNET_YES if we should continue to iterate,
5599 shutdown_peer (void *cls, const struct GNUNET_HashCode * key, void *value)
5601 struct MeshPeerInfo *p = value;
5602 struct MeshPeerQueue *q;
5603 struct MeshPeerQueue *n;
5611 queue_destroy(q, GNUNET_YES);
5615 peer_info_destroy (p);
5621 * Task run during shutdown.
5627 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
5629 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
5631 if (core_handle != NULL)
5633 GNUNET_CORE_disconnect (core_handle);
5636 GNUNET_CONTAINER_multihashmap_iterate (tunnels, &shutdown_tunnel, NULL);
5637 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_peer, NULL);
5638 if (dht_handle != NULL)
5640 GNUNET_DHT_disconnect (dht_handle);
5645 GNUNET_SERVER_notification_context_destroy (nc);
5648 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
5650 GNUNET_SCHEDULER_cancel (announce_id_task);
5651 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
5653 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
5658 * Process mesh requests.
5660 * @param cls closure
5661 * @param server the initialized server
5662 * @param c configuration to use
5665 run (void *cls, struct GNUNET_SERVER_Handle *server,
5666 const struct GNUNET_CONFIGURATION_Handle *c)
5669 struct GNUNET_CRYPTO_EccPrivateKey *pk;
5671 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
5672 server_handle = server;
5673 GNUNET_SERVER_suspend (server_handle);
5676 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
5679 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5681 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5682 "mesh", "peer/privatekey");
5683 GNUNET_SCHEDULER_shutdown ();
5688 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_PATH_TIME",
5689 &refresh_path_time))
5691 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5693 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5694 "mesh", "refresh path time");
5695 GNUNET_SCHEDULER_shutdown ();
5700 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
5703 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5705 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5706 "mesh", "id announce time");
5707 GNUNET_SCHEDULER_shutdown ();
5712 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
5715 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5717 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5718 "mesh", "connect timeout");
5719 GNUNET_SCHEDULER_shutdown ();
5724 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
5727 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5729 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5730 "mesh", "max msgs queue");
5731 GNUNET_SCHEDULER_shutdown ();
5736 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_TUNNELS",
5739 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
5741 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
5742 "mesh", "max tunnels");
5743 GNUNET_SCHEDULER_shutdown ();
5748 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
5751 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5753 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5754 "mesh", "default ttl", 64);
5759 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
5762 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5763 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5764 "mesh", "max peers", 1000);
5769 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
5776 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5777 "Mesh is running with drop mode enabled. "
5778 "This is NOT a good idea! "
5779 "Remove the DROP_PERCENT option from your configuration.\n");
5783 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
5784 &dht_replication_level))
5786 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
5788 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
5789 "mesh", "dht replication level", 3);
5790 dht_replication_level = 3;
5793 tunnels = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5794 incoming_tunnels = GNUNET_CONTAINER_multihashmap32_create (32);
5795 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
5796 ports = GNUNET_CONTAINER_multihashmap32_create (32);
5798 dht_handle = GNUNET_DHT_connect (c, 64);
5799 if (NULL == dht_handle)
5803 stats = GNUNET_STATISTICS_create ("mesh", c);
5805 /* Scheduled the task to clean up when shutdown is called */
5806 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
5808 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
5809 GNUNET_free (keyfile);
5810 GNUNET_assert (NULL != pk);
5811 my_private_key = pk;
5812 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
5813 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
5814 &my_full_id.hashPubKey);
5815 myid = GNUNET_PEER_intern (&my_full_id);
5816 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
5817 "Mesh for peer [%s] starting\n",
5818 GNUNET_i2s(&my_full_id));
5820 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
5821 NULL, /* Closure passed to MESH functions */
5822 &core_init, /* Call core_init once connected */
5823 &core_connect, /* Handle connects */
5824 &core_disconnect, /* remove peers on disconnects */
5825 NULL, /* Don't notify about all incoming messages */
5826 GNUNET_NO, /* For header only in notification */
5827 NULL, /* Don't notify about all outbound messages */
5828 GNUNET_NO, /* For header-only out notification */
5829 core_handlers); /* Register these handlers */
5830 if (NULL == core_handle)
5833 GNUNET_SCHEDULER_shutdown ();
5837 next_local_tid = GNUNET_MESH_LOCAL_TUNNEL_ID_SERV;
5838 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
5839 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
5844 * The main function for the mesh service.
5846 * @param argc number of arguments from the command line
5847 * @param argv command line arguments
5848 * @return 0 ok, 1 on error
5851 main (int argc, char *const *argv)
5856 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
5857 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
5859 ret = (GNUNET_OK == r) ? 0 : 1;
5860 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");