2 This file is part of GNUnet.
3 (C) 2001-2013 Christian Grothoff (and other contributing authors)
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
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17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 * @file mesh/gnunet-service-mesh-enc.c
23 * @brief GNUnet MESH service with encryption
24 * @author Bartlomiej Polot
27 * - when sending in-order buffered data, wait for client ACKs
30 * - set connection IDs independently from tunnel, tunnel has no ID
33 * - relay corking down to core
34 * - set ttl relative to path length
38 * - peer: other mesh instance. If there is direct connection it's a neighbor.
39 * - tunnel: encrypted connection to a peer, neighbor or not.
40 * - channel: connection between two clients, on the same or different peers.
41 * have properties like reliability.
42 * - path: series of directly connected peer from one peer to another.
43 * - connection: path which is being used in a tunnel.
47 #include "gnunet_crypto_lib.h"
49 #include "mesh_protocol_enc.h"
50 #include "mesh_path.h"
51 #include "block_mesh.h"
52 #include "gnunet_dht_service.h"
53 #include "gnunet_statistics_service.h"
55 #define MESH_BLOOM_SIZE 128
57 #define MESH_DEBUG_DHT GNUNET_NO
58 #define MESH_DEBUG_CONNECTION GNUNET_YES
59 #define MESH_DEBUG_TIMING __LINUX__ && GNUNET_NO
61 #define MESH_MAX_POLL_TIME GNUNET_TIME_relative_multiply (\
62 GNUNET_TIME_UNIT_MINUTES,\
64 #define MESH_RETRANSMIT_TIME GNUNET_TIME_UNIT_SECONDS
65 #define MESH_RETRANSMIT_MARGIN 4
67 #if MESH_DEBUG_CONNECTION
68 #define DEBUG_CONN(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
70 #define DEBUG_CONN(...)
74 #define DEBUG_DHT(...) GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
76 #define DEBUG_DHT(...)
83 struct timespec __mesh_start;
84 struct timespec __mesh_end;
85 #define INTERVAL_START clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_start))
86 #define INTERVAL_END \
88 clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &(__mesh_end));\
89 double __diff = __mesh_end.tv_nsec - __mesh_start.tv_nsec;\
90 if (__diff < 0) __diff += 1000000000;\
94 #define INTERVAL_SHOW \
96 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "AVG process time: %f ns\n", __sum/__count)
98 #define INTERVAL_START
100 #define INTERVAL_SHOW
104 * All the states a tunnel can be in.
109 * Uninitialized status, should never appear in operation.
114 * Path to the peer not known yet
116 MESH_TUNNEL_SEARCHING,
119 * Request sent, not yet answered.
124 * Peer connected and ready to accept data
129 * Peer connected previosly but not responding
131 MESH_TUNNEL_RECONNECTING
136 * All the states a connection can be in.
138 enum MeshConnectionState
141 * Uninitialized status, should never appear in operation.
146 * Connection create message sent, waiting for ACK.
148 MESH_CONNECTION_SENT,
151 * Connection ACK sent, waiting for ACK.
156 * Connection confirmed, ready to carry traffic.
158 MESH_CONNECTION_READY,
163 * All the states a connection can be in.
165 enum MeshChannelState
168 * Uninitialized status, should never appear in operation.
173 * Connection create message sent, waiting for ACK.
178 * Connection confirmed, ready to carry traffic..
184 /******************************************************************************/
185 /************************ DATA STRUCTURES ****************************/
186 /******************************************************************************/
188 /** FWD declaration */
192 struct MeshConnection;
194 struct MeshChannelReliability;
198 * Struct containing info about a queued transmission to this peer
205 struct MeshPeerQueue *next;
210 struct MeshPeerQueue *prev;
213 * Peer this transmission is directed to.
215 struct MeshPeer *peer;
218 * Connection this message belongs to.
220 struct MeshConnection *c;
228 * Channel this message belongs to, if known.
230 struct MeshChannel *ch;
233 * Pointer to info stucture used as cls.
243 * Size of the message
250 * Struct to encapsulate all the Flow Control information to a peer to which
251 * we are directly connected (on a core level).
253 struct MeshFlowControl
256 * Connection this controls.
258 struct MeshConnection *c;
261 * How many messages are in the queue on this connection.
263 unsigned int queue_n;
266 * How many messages do we accept in the queue.
268 unsigned int queue_max;
276 * ID of the last packet sent towards the peer.
278 uint32_t last_pid_sent;
281 * ID of the last packet received from the peer.
283 uint32_t last_pid_recv;
286 * Last ACK sent to the peer (peer can't send more than this PID).
288 uint32_t last_ack_sent;
291 * Last ACK sent towards the origin (for traffic towards leaf node).
293 uint32_t last_ack_recv;
296 * Task to poll the peer in case of a lost ACK causes stall.
298 GNUNET_SCHEDULER_TaskIdentifier poll_task;
301 * How frequently to poll for ACKs.
303 struct GNUNET_TIME_Relative poll_time;
308 * Struct containing all information regarding a given peer
318 * Last time we heard from this peer
320 struct GNUNET_TIME_Absolute last_contact;
323 * Paths to reach the peer, ordered by ascending hop count
325 struct MeshPeerPath *path_head;
328 * Paths to reach the peer, ordered by ascending hop count
330 struct MeshPeerPath *path_tail;
333 * Handle to stop the DHT search for paths to this peer
335 struct GNUNET_DHT_GetHandle *dhtget;
338 * Tunnel to this peer, if any.
340 struct MeshTunnel2 *tunnel;
343 * Connections that go through this peer, indexed by tid;
345 struct GNUNET_CONTAINER_MultiHashMap *connections;
348 * Handle for queued transmissions
350 struct GNUNET_CORE_TransmitHandle *core_transmit;
353 * Transmission queue to core DLL head
355 struct MeshPeerQueue *queue_head;
358 * Transmission queue to core DLL tail
360 struct MeshPeerQueue *queue_tail;
363 * How many messages are in the queue to this peer.
365 unsigned int queue_n;
370 * Info needed to retry a message in case it gets lost.
372 struct MeshReliableMessage
375 * Double linked list, FIFO style
377 struct MeshReliableMessage *next;
378 struct MeshReliableMessage *prev;
381 * Type of message (payload, channel management).
386 * Tunnel Reliability queue this message is in.
388 struct MeshChannelReliability *rel;
391 * ID of the message (ACK needed to free)
396 * When was this message issued (to calculate ACK delay)
398 struct GNUNET_TIME_Absolute timestamp;
400 /* struct GNUNET_MESH_Data with payload */
405 * Info about the traffic state for a client in a channel.
407 struct MeshChannelReliability
410 * Channel this is about.
412 struct MeshChannel *ch;
415 * DLL of messages sent and not yet ACK'd.
417 struct MeshReliableMessage *head_sent;
418 struct MeshReliableMessage *tail_sent;
421 * Messages pending to send.
426 * DLL of messages received out of order.
428 struct MeshReliableMessage *head_recv;
429 struct MeshReliableMessage *tail_recv;
437 * Next MID to use for outgoing traffic.
442 * Next MID expected for incoming traffic.
447 * Can we send data to the client?
452 * Task to resend/poll in case no ACK is received.
454 GNUNET_SCHEDULER_TaskIdentifier retry_task;
457 * Counter for exponential backoff.
459 struct GNUNET_TIME_Relative retry_timer;
462 * How long does it usually take to get an ACK.
464 struct GNUNET_TIME_Relative expected_delay;
469 * Struct containing all information regarding a channel to a remote client.
474 * Tunnel this channel is in.
476 struct MeshTunnel2 *t;
479 * Double linked list.
481 struct MeshChannel *next;
482 struct MeshChannel *prev;
485 * Destination port of the channel.
490 * Global channel number ( < GNUNET_MESH_LOCAL_CHANNEL_ID_CLI)
492 MESH_ChannelNumber gid;
495 * Local tunnel number for root (owner) client.
496 * ( >= GNUNET_MESH_LOCAL_CHANNEL_ID_CLI or 0 )
498 MESH_ChannelNumber lid_root;
501 * Local tunnel number for local destination clients (incoming number)
502 * ( >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV or 0).
504 MESH_ChannelNumber lid_dest;
509 enum MeshChannelState state;
512 * Is the tunnel bufferless (minimum latency)?
517 * Is the tunnel reliable?
522 * Last time the channel was used
524 struct GNUNET_TIME_Absolute timestamp;
527 * Client owner of the tunnel, if any
529 struct MeshClient *root;
532 * Client destination of the tunnel, if any.
534 struct MeshClient *dest;
537 * Flag to signal the destruction of the channel.
538 * If this is set GNUNET_YES the channel will be destroyed
539 * when the queue is empty.
544 * Total messages pending for this channel, payload or not.
546 unsigned int pending_messages;
550 * Only present (non-NULL) at the owner of a tunnel.
552 struct MeshChannelReliability *root_rel;
556 * Only present (non-NULL) at the destination of a tunnel.
558 struct MeshChannelReliability *dest_rel;
564 * Struct containing all information regarding a connection to a peer.
566 struct MeshConnection
571 struct MeshConnection *next;
572 struct MeshConnection *prev;
575 * Tunnel this connection is part of.
577 struct MeshTunnel2 *t;
580 * Flow control information for traffic fwd.
582 struct MeshFlowControl fwd_fc;
585 * Flow control information for traffic bck.
587 struct MeshFlowControl bck_fc;
590 * ID of the connection.
592 struct GNUNET_HashCode id;
595 * State of the connection.
597 enum MeshConnectionState state;
600 * Path being used for the tunnel.
602 struct MeshPeerPath *path;
605 * Position of the local peer in the path.
607 unsigned int own_pos;
610 * Task to keep the used paths alive at the owner,
611 * time tunnel out on all the other peers.
613 GNUNET_SCHEDULER_TaskIdentifier fwd_maintenance_task;
616 * Task to keep the used paths alive at the destination,
617 * time tunnel out on all the other peers.
619 GNUNET_SCHEDULER_TaskIdentifier bck_maintenance_task;
622 * Pending message count.
624 int pending_messages;
627 * Destroy flag: if true, destroy on last message.
634 * Struct used to queue messages in a tunnel.
636 struct MeshTunnelQueue
641 struct MeshTunnelQueue *next;
642 struct MeshTunnelQueue *prev;
647 struct MeshChannel *ch;
652 /* struct GNUNET_MessageHeader *msg; */
657 * Struct containing all information regarding a tunnel to a peer.
662 * Endpoint of the tunnel.
664 struct MeshPeer *peer;
667 * State of the tunnel.
669 enum MeshTunnelState state;
672 * Local peer ephemeral private key
674 struct GNUNET_CRYPTO_EccPrivateKey *my_eph_key;
677 * Local peer ephemeral public key
679 struct GNUNET_CRYPTO_EccPublicKey *my_eph;
682 * Remote peer's public key.
684 struct GNUNET_CRYPTO_EccPublicKey *peers_eph;
687 * Encryption ("our") key.
689 struct GNUNET_CRYPTO_AesSessionKey e_key;
692 * Decryption ("their") key.
694 struct GNUNET_CRYPTO_AesSessionKey d_key;
697 * Paths that are actively used to reach the destination peer.
699 struct MeshConnection *connection_head;
700 struct MeshConnection *connection_tail;
703 * Next connection number.
708 * Channels inside this tunnel.
710 struct MeshChannel *channel_head;
711 struct MeshChannel *channel_tail;
714 * Channel ID for the next created channel.
716 MESH_ChannelNumber next_chid;
719 * Channel ID for the next incoming channel.
721 MESH_ChannelNumber next_local_chid;
724 * Pending message count.
726 int pending_messages;
729 * Destroy flag: if true, destroy on last message.
734 * Queued messages, to transmit once tunnel gets connected.
736 struct MeshTunnelQueue *tq_head;
737 struct MeshTunnelQueue *tq_tail;
743 * Struct containing information about a client of the service
745 * TODO: add a list of 'waiting' ports
752 struct MeshClient *next;
757 struct MeshClient *prev;
760 * Tunnels that belong to this client, indexed by local id
762 struct GNUNET_CONTAINER_MultiHashMap32 *own_channels;
765 * Tunnels this client has accepted, indexed by incoming local id
767 struct GNUNET_CONTAINER_MultiHashMap32 *incoming_channels;
770 * Handle to communicate with the client
772 struct GNUNET_SERVER_Client *handle;
775 * Ports that this client has declared interest in.
776 * Indexed by port, contains *Client.
778 struct GNUNET_CONTAINER_MultiHashMap32 *ports;
781 * Whether the client is active or shutting down (don't send confirmations
782 * to a client that is shutting down.
787 * ID of the client, mainly for debug messages
793 /******************************************************************************/
794 /************************ DEBUG FUNCTIONS ****************************/
795 /******************************************************************************/
799 * GNUNET_SCHEDULER_Task for printing a message after some operation is done
800 * @param cls string to print
801 * @param success GNUNET_OK if the PUT was transmitted,
802 * GNUNET_NO on timeout,
803 * GNUNET_SYSERR on disconnect from service
804 * after the PUT message was transmitted
805 * (so we don't know if it was received or not)
810 mesh_debug (void *cls, int success)
814 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "%s (%d)\n", s, success);
820 /******************************************************************************/
821 /*********************** GLOBAL VARIABLES ****************************/
822 /******************************************************************************/
824 /************************** Configuration parameters **************************/
827 * How often to send path keepalives. Paths timeout after 4 missed.
829 static struct GNUNET_TIME_Relative refresh_connection_time;
832 * How often to PUT own ID in the DHT.
834 static struct GNUNET_TIME_Relative id_announce_time;
837 * Maximum time allowed to connect to a peer found by string.
839 static struct GNUNET_TIME_Relative connect_timeout;
842 * Default TTL for payload packets.
844 static unsigned long long default_ttl;
847 * DHT replication level, see DHT API: GNUNET_DHT_get_start, GNUNET_DHT_put.
849 static unsigned long long dht_replication_level;
852 * How many connections are we willing to maintain.
853 * Local connections are always allowed, even if there are more connections than max.
855 static unsigned long long max_connections;
858 * How many messages *in total* are we willing to queue, divide by number of
859 * connections to get connection queue size.
861 static unsigned long long max_msgs_queue;
864 * How many peers do we want to remember?
866 static unsigned long long max_peers;
869 * Percentage of messages that will be dropped (for test purposes only).
871 static unsigned long long drop_percent;
873 /*************************** Static global variables **************************/
876 * DLL with all the clients, head.
878 static struct MeshClient *clients_head;
881 * DLL with all the clients, tail.
883 static struct MeshClient *clients_tail;
886 * Connections known, indexed by cid (MeshConnection).
888 static struct GNUNET_CONTAINER_MultiHashMap *connections;
891 * Peers known, indexed by PeerIdentity (MeshPeer).
893 static struct GNUNET_CONTAINER_MultiHashMap *peers;
896 * Handle to communicate with core.
898 static struct GNUNET_CORE_Handle *core_handle;
903 static struct GNUNET_DHT_Handle *dht_handle;
906 * Handle to server lib.
908 static struct GNUNET_SERVER_Handle *server_handle;
911 * Handle to the statistics service.
913 static struct GNUNET_STATISTICS_Handle *stats;
916 * Notification context, to send messages to local clients.
918 static struct GNUNET_SERVER_NotificationContext *nc;
921 * Local peer own ID (memory efficient handle).
923 static GNUNET_PEER_Id myid;
926 * Local peer own ID (full value).
928 static struct GNUNET_PeerIdentity my_full_id;
933 static struct GNUNET_CRYPTO_EccPrivateKey *my_private_key;
938 static struct GNUNET_CRYPTO_EccPublicKey my_public_key;
941 * All ports clients of this peer have opened.
943 static struct GNUNET_CONTAINER_MultiHashMap32 *ports;
946 * Task to periodically announce itself in the network.
948 GNUNET_SCHEDULER_TaskIdentifier announce_id_task;
951 * Next ID to assign to a client.
953 unsigned int next_client_id;
956 /******************************************************************************/
957 /*********************** DECLARATIONS **************************/
958 /******************************************************************************/
961 * Function to process paths received for a new peer addition. The recorded
962 * paths form the initial tunnel, which can be optimized later.
963 * Called on each result obtained for the DHT search.
966 * @param exp when will this value expire
967 * @param key key of the result
968 * @param type type of the result
969 * @param size number of bytes in data
970 * @param data pointer to the result data
973 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
974 const struct GNUNET_HashCode * key,
975 const struct GNUNET_PeerIdentity *get_path,
976 unsigned int get_path_length,
977 const struct GNUNET_PeerIdentity *put_path,
978 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
979 size_t size, const void *data);
983 * Retrieve the MeshPeer stucture associated with the peer, create one
984 * and insert it in the appropriate structures if the peer is not known yet.
986 * @param peer Full identity of the peer.
988 * @return Existing or newly created peer info.
990 static struct MeshPeer *
991 peer_get (const struct GNUNET_PeerIdentity *peer);
995 * Retrieve the MeshPeer stucture associated with the peer, create one
996 * and insert it in the appropriate structures if the peer is not known yet.
998 * @param peer Short identity of the peer.
1000 * @return Existing or newly created peer info.
1002 static struct MeshPeer *
1003 peer_get_short (const GNUNET_PEER_Id peer);
1007 * Build a PeerPath from the paths returned from the DHT, reversing the paths
1008 * to obtain a local peer -> destination path and interning the peer ids.
1010 * @return Newly allocated and created path
1012 static struct MeshPeerPath *
1013 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
1014 unsigned int get_path_length,
1015 const struct GNUNET_PeerIdentity *put_path,
1016 unsigned int put_path_length);
1020 * Adds a path to the data structs of all the peers in the path
1022 * @param p Path to process.
1023 * @param confirmed Whether we know if the path works or not.
1026 path_add_to_peers (struct MeshPeerPath *p, int confirmed);
1030 * Search for a tunnel by global ID using full PeerIdentities.
1032 * @param t Tunnel containing the channel.
1033 * @param chid Public channel number.
1035 * @return channel handler, NULL if doesn't exist
1037 static struct MeshChannel *
1038 channel_get (struct MeshTunnel2 *t, MESH_ChannelNumber chid);
1041 * Modify the data message ID from global to local and send to client.
1043 * @param ch Channel on which to send the message.
1044 * @param msg Message to modify and send.
1045 * @param fwd Forward?
1048 channel_send_client_data (struct MeshChannel *ch,
1049 const struct GNUNET_MESH_Data *msg,
1054 * Change the tunnel state.
1056 * @param t Tunnel whose state to change.
1057 * @param state New state.
1060 tunnel_change_state (struct MeshTunnel2 *t, enum MeshTunnelState state);
1064 * Notify a tunnel that a connection has broken that affects at least
1065 * some of its peers.
1067 * @param t Tunnel affected.
1068 * @param p1 Peer that got disconnected from p2.
1069 * @param p2 Peer that got disconnected from p1.
1071 * @return Short ID of the peer disconnected (either p1 or p2).
1072 * 0 if the tunnel remained unaffected.
1074 static GNUNET_PEER_Id
1075 tunnel_notify_connection_broken (struct MeshTunnel2 *t,
1076 GNUNET_PEER_Id p1, GNUNET_PEER_Id p2);
1079 * @brief Use the given path for the tunnel.
1080 * Update the next and prev hops (and RCs).
1081 * (Re)start the path refresh in case the tunnel is locally owned.
1083 * @param t Tunnel to update.
1084 * @param p Path to use.
1086 * @return Connection created.
1088 static struct MeshConnection *
1089 tunnel_use_path (struct MeshTunnel2 *t, struct MeshPeerPath *p);
1092 * Tunnel is empty: destroy it.
1094 * Notifies all participants (peers, cleints) about the destruction.
1096 * @param t Tunnel to destroy.
1099 tunnel_destroy_empty (struct MeshTunnel2 *t);
1102 * Destroy the tunnel.
1104 * This function does not generate any warning traffic to clients or peers.
1107 * Cancel messages belonging to this tunnel queued to neighbors.
1108 * Free any allocated resources linked to the tunnel.
1110 * @param t The tunnel to destroy.
1113 tunnel_destroy (struct MeshTunnel2 *t);
1116 * Create a connection.
1118 * @param cid Connection ID.
1120 static struct MeshConnection *
1121 connection_new (const struct GNUNET_HashCode *cid);
1124 * Connection is no longer needed: destroy it and remove from tunnel.
1126 * @param c Connection to destroy.
1129 connection_destroy (struct MeshConnection *c);
1132 * Send FWD keepalive packets for a connection.
1134 * @param cls Closure (connection for which to send the keepalive).
1135 * @param tc Notification context.
1138 connection_fwd_keepalive (void *cls,
1139 const struct GNUNET_SCHEDULER_TaskContext *tc);
1142 * Send BCK keepalive packets for a connection.
1144 * @param cls Closure (connection for which to send the keepalive).
1145 * @param tc Notification context.
1148 connection_bck_keepalive (void *cls,
1149 const struct GNUNET_SCHEDULER_TaskContext *tc);
1153 * Change the tunnel state.
1155 * @param c Connection whose state to change.
1156 * @param state New state.
1159 connection_change_state (struct MeshConnection* c,
1160 enum MeshConnectionState state);
1165 * @brief Queue and pass message to core when possible.
1167 * @param cls Closure (@c type dependant). It will be used by queue_send to
1168 * build the message to be sent if not already prebuilt.
1169 * @param type Type of the message, 0 for a raw message.
1170 * @param size Size of the message.
1171 * @param c Connection this message belongs to (cannot be NULL).
1172 * @param ch Channel this message belongs to, if applicable (otherwise NULL).
1173 * @param fwd Is this a message going root->dest? (FWD ACK are NOT FWD!)
1176 queue_add (void* cls,
1179 struct MeshConnection* c,
1180 struct MeshChannel* ch,
1185 * Free a transmission that was already queued with all resources
1186 * associated to the request.
1188 * @param queue Queue handler to cancel.
1189 * @param clear_cls Is it necessary to free associated cls?
1192 queue_destroy (struct MeshPeerQueue *queue, int clear_cls);
1196 * Core callback to write a queued packet to core buffer
1198 * @param cls Closure (peer info).
1199 * @param size Number of bytes available in buf.
1200 * @param buf Where the to write the message.
1202 * @return number of bytes written to buf
1205 queue_send (void *cls, size_t size, void *buf);
1209 * Demultiplex by message type and call appropriate handler for a message
1210 * towards a channel of a local tunnel.
1212 * @param t Tunnel this message came on.
1213 * @param msgh Message header.
1214 * @param fwd Is this message fwd?
1217 handle_decrypted (struct MeshTunnel2 *t,
1218 const struct GNUNET_MessageHeader *msgh,
1223 * Dummy function to separate declarations from definitions in function list.
1226 __mesh_divider______________________________________________________________();
1230 * Get string description for tunnel state.
1232 * @param s Tunnel state.
1234 * @return String representation.
1237 GNUNET_MESH_DEBUG_TS2S (enum MeshTunnelState s)
1239 static char buf[128];
1243 case MESH_TUNNEL_NEW:
1244 return "MESH_TUNNEL_NEW";
1245 case MESH_TUNNEL_SEARCHING:
1246 return "MESH_TUNNEL_SEARCHING";
1247 case MESH_TUNNEL_WAITING:
1248 return "MESH_TUNNEL_WAITING";
1249 case MESH_TUNNEL_READY:
1250 return "MESH_TUNNEL_READY";
1251 case MESH_TUNNEL_RECONNECTING:
1252 return "MESH_TUNNEL_RECONNECTING";
1255 sprintf (buf, "%u (UNKNOWN STATE)", s);
1262 * Get string description for tunnel state.
1264 * @param s Tunnel state.
1266 * @return String representation.
1269 GNUNET_MESH_DEBUG_CS2S (enum MeshTunnelState s)
1273 case MESH_CONNECTION_NEW:
1274 return "MESH_CONNECTION_NEW";
1275 case MESH_CONNECTION_SENT:
1276 return "MESH_CONNECTION_SENT";
1277 case MESH_CONNECTION_READY:
1278 return "MESH_CONNECTION_READY";
1280 return "MESH_CONNECTION_STATE_ERROR";
1286 /******************************************************************************/
1287 /************************ PERIODIC FUNCTIONS ****************************/
1288 /******************************************************************************/
1291 * Periodically announce self id in the DHT
1293 * @param cls closure
1294 * @param tc task context
1297 announce_id (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
1299 struct PBlock block;
1301 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
1303 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
1307 * - Set data expiration in function of X
1308 * - Adapt X to churn
1310 DEBUG_DHT ("DHT_put for ID %s started.\n", GNUNET_i2s (&my_full_id));
1312 block.id = my_full_id;
1313 GNUNET_DHT_put (dht_handle, /* DHT handle */
1314 &my_full_id.hashPubKey, /* Key to use */
1315 dht_replication_level, /* Replication level */
1316 GNUNET_DHT_RO_RECORD_ROUTE | GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE, /* DHT options */
1317 GNUNET_BLOCK_TYPE_MESH_PEER, /* Block type */
1318 sizeof (block), /* Size of the data */
1319 (const char *) &block, /* Data itself */
1320 GNUNET_TIME_UNIT_FOREVER_ABS, /* Data expiration */
1321 GNUNET_TIME_UNIT_FOREVER_REL, /* Retry time */
1322 NULL, /* Continuation */
1323 NULL); /* Continuation closure */
1325 GNUNET_SCHEDULER_add_delayed (id_announce_time, &announce_id, cls);
1329 /******************************************************************************/
1330 /****************** GENERAL HELPER FUNCTIONS ************************/
1331 /******************************************************************************/
1335 * Get the static string for a peer ID.
1339 * @return Static string for it's ID.
1342 peer2s (const struct MeshPeer *peer)
1346 return GNUNET_i2s (GNUNET_PEER_resolve2 (peer->id));
1351 * Get the previous hop in a connection
1353 * @param c Connection.
1355 * @return Previous peer in the connection.
1357 static struct MeshPeer *
1358 connection_get_prev_hop (struct MeshConnection *c)
1362 if (0 == c->own_pos || c->path->length < 2)
1363 id = c->path->peers[0];
1365 id = c->path->peers[c->own_pos - 1];
1367 return peer_get_short (id);
1372 * Get the next hop in a connection
1374 * @param c Connection.
1376 * @return Next peer in the connection.
1378 static struct MeshPeer *
1379 connection_get_next_hop (struct MeshConnection *c)
1383 if ((c->path->length - 1) == c->own_pos || c->path->length < 2)
1384 id = c->path->peers[c->path->length - 1];
1386 id = c->path->peers[c->own_pos + 1];
1388 return peer_get_short (id);
1393 * Get the hop in a connection.
1395 * @param c Connection.
1396 * @param fwd Next hop?
1398 * @return Next peer in the connection.
1400 static struct MeshPeer *
1401 connection_get_hop (struct MeshConnection *c, int fwd)
1404 return connection_get_next_hop (c);
1405 return connection_get_prev_hop (c);
1409 * Check if client has registered with the service and has not disconnected
1411 * @param client the client to check
1413 * @return non-NULL if client exists in the global DLL
1415 static struct MeshClient *
1416 client_get (struct GNUNET_SERVER_Client *client)
1418 return GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
1423 * Deletes a tunnel from a client (either owner or destination).
1425 * @param c Client whose tunnel to delete.
1426 * @param ch Channel which should be deleted.
1429 client_delete_channel (struct MeshClient *c, struct MeshChannel *ch)
1435 res = GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
1437 if (GNUNET_YES != res)
1438 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client_delete_channel owner KO\n");
1442 res = GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
1444 if (GNUNET_YES != res)
1445 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client_delete_tunnel client KO\n");
1451 * Notify the appropriate client that a new incoming channel was created.
1453 * @param ch Channel that was created.
1456 send_local_channel_create (struct MeshChannel *ch)
1458 struct GNUNET_MESH_ChannelMessage msg;
1459 struct MeshTunnel2 *t = ch->t;
1461 if (NULL == ch->dest)
1463 msg.header.size = htons (sizeof (msg));
1464 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_CREATE);
1465 msg.channel_id = htonl (ch->lid_dest);
1466 msg.port = htonl (ch->port);
1468 msg.opt |= GNUNET_YES == ch->reliable ? GNUNET_MESH_OPTION_RELIABLE : 0;
1469 msg.opt |= GNUNET_YES == ch->nobuffer ? GNUNET_MESH_OPTION_NOBUFFER : 0;
1470 msg.opt = htonl (msg.opt);
1471 GNUNET_PEER_resolve (t->peer->id, &msg.peer);
1472 GNUNET_SERVER_notification_context_unicast (nc, ch->dest->handle,
1473 &msg.header, GNUNET_NO);
1478 * Notify a client that the incoming tunnel is no longer valid.
1480 * @param ch Channel that is destroyed.
1481 * @param fwd Forward notification (owner->dest)?
1484 send_local_channel_destroy (struct MeshChannel *ch, int fwd)
1486 struct GNUNET_MESH_ChannelMessage msg;
1487 struct MeshClient *c;
1489 c = fwd ? ch->dest : ch->root;
1495 msg.header.size = htons (sizeof (msg));
1496 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_TUNNEL_DESTROY);
1497 msg.channel_id = htonl (fwd ? ch->lid_dest : ch->lid_root);
1498 msg.port = htonl (0);
1499 memset (&msg.peer, 0, sizeof (msg.peer));
1500 msg.opt = htonl (0);
1501 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
1502 &msg.header, GNUNET_NO);
1507 * Build a local ACK message and send it to a local client, if needed.
1509 * If the client was already allowed to send data, do nothing.
1511 * @param ch Channel on which to send the ACK.
1512 * @param c Client to whom send the ACK.
1513 * @param fwd Set to GNUNET_YES for FWD ACK (dest->root)
1516 send_local_ack (struct MeshChannel *ch, int fwd)
1518 struct GNUNET_MESH_LocalAck msg;
1519 struct MeshChannelReliability *rel;
1520 struct MeshClient *c;
1522 c = fwd ? ch->root : ch->dest;
1523 rel = fwd ? ch->root_rel : ch->dest_rel;
1525 if (GNUNET_YES == rel->client_ready)
1526 return; /* don't send double ACKs to client */
1528 rel->client_ready = GNUNET_YES;
1530 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
1531 "send local %s ack on %s:%X towards %p\n",
1532 fwd ? "FWD" : "BCK", peer2s (ch->t->peer), ch->gid, c);
1535 || ( fwd && (0 == ch->lid_root || c != ch->root))
1536 || (!fwd && (0 == ch->lid_dest || c != ch->dest)) )
1541 msg.header.size = htons (sizeof (msg));
1542 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK);
1543 msg.channel_id = htonl (fwd ? ch->lid_root : ch->lid_dest);
1544 GNUNET_SERVER_notification_context_unicast (nc,
1553 * Count established (ready) connections of a tunnel.
1555 * @param t Tunnel on which to send the message.
1557 * @return Number of connections.
1560 tunnel_count_connections (struct MeshTunnel2 *t)
1562 struct MeshConnection *c;
1565 for (c = t->connection_head, i = 0; NULL != c; c = c->next, i++);
1572 * Pick a connection on which send the next data message.
1574 * @param t Tunnel on which to send the message.
1575 * @param fwd Is this a fwd message?
1577 * @return The connection on which to send the next message.
1579 static struct MeshConnection *
1580 tunnel_get_connection (struct MeshTunnel2 *t, int fwd)
1582 struct MeshConnection *c;
1583 struct MeshConnection *best;
1584 struct MeshFlowControl *fc;
1585 unsigned int lowest_q;
1587 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "tunnel_get_connection %s\n",
1590 lowest_q = UINT_MAX;
1591 for (c = t->connection_head; NULL != c; c = c->next)
1593 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " connection %s, \n",
1594 GNUNET_h2s (&c->id));
1595 if (MESH_CONNECTION_READY == c->state)
1597 fc = fwd ? &c->fwd_fc : &c->bck_fc;
1603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " q_n %u, \n", fc->queue_n);
1604 if (fc->queue_n < lowest_q)
1607 lowest_q = fc->queue_n;
1616 * Is this peer the first one on the connection?
1618 * @param c Connection.
1619 * @param fwd Is this about fwd traffic?
1621 * @return GNUNET_YES if origin, GNUNET_NO if relay/terminal.
1624 connection_is_origin (struct MeshConnection *c, int fwd)
1626 if (!fwd && c->own_pos == c->path->length - 1)
1628 if (fwd && c->own_pos == 0)
1635 * Is this peer the last one on the connection?
1637 * @param c Connection.
1638 * @param fwd Is this about fwd traffic?
1639 * Note that the ROOT is the terminal for BCK traffic!
1641 * @return GNUNET_YES if terminal, GNUNET_NO if relay/origin.
1644 connection_is_terminal (struct MeshConnection *c, int fwd)
1646 if (fwd && c->own_pos == c->path->length - 1)
1648 if (!fwd && c->own_pos == 0)
1655 * Is the recipient client for this channel on this peer?
1657 * @param ch Channel.
1658 * @param fwd Is this for fwd traffic?
1660 * @return GNUNET_YES in case it is.
1663 channel_is_terminal (struct MeshChannel *ch, int fwd)
1665 if (NULL == ch->t || NULL == ch->t->connection_head)
1670 return connection_is_terminal (ch->t->connection_head, fwd);
1675 * Get free buffer space towards the client on a specific channel.
1677 * @param ch Channel.
1678 * @param fwd Is query about FWD traffic?
1680 * @return Free buffer space [0 - 64]
1683 channel_get_buffer (struct MeshChannel *ch, int fwd)
1685 struct MeshChannelReliability *rel;
1687 rel = fwd ? ch->dest_rel : ch->root_rel;
1689 /* If rel is NULL it means that the end is not yet created,
1690 * most probably is a loopback channel at the point of sending
1691 * the ChannelCreate to itself.
1696 return (64 - rel->n_recv);
1701 * Get free buffer space in a connection.
1703 * @param c Connection.
1704 * @param fwd Is query about FWD traffic?
1706 * @return Free buffer space [0 - max_msgs_queue/max_connections]
1709 connection_get_buffer (struct MeshConnection *c, int fwd)
1711 struct MeshFlowControl *fc;
1713 fc = fwd ? &c->fwd_fc : &c->bck_fc;
1715 return (fc->queue_max - fc->queue_n);
1720 * Get the total buffer space for a tunnel.
1723 tunnel_get_buffer (struct MeshTunnel2 *t, int fwd)
1725 struct MeshConnection *c;
1726 struct MeshFlowControl *fc;
1727 unsigned int buffer;
1729 c = t->connection_head;
1738 /* If terminal, return biggest channel buffer */
1739 if (connection_is_terminal (c, fwd))
1741 struct MeshChannel *ch;
1742 unsigned int ch_buf;
1744 if (NULL == t->channel_head)
1747 for (ch = t->channel_head; NULL != ch; ch = ch->next)
1749 ch_buf = channel_get_buffer (ch, fwd);
1750 if (ch_buf > buffer)
1756 /* If not terminal, return sum of connection buffers */
1759 if (c->state != MESH_CONNECTION_READY)
1762 fc = fwd ? &c->fwd_fc : &c->bck_fc;
1763 buffer += fc->last_ack_recv - fc->last_pid_sent;
1772 * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
1773 * Encrypt data with the tunnel key.
1775 * @param t Tunnel whose key to use.
1776 * @param dst Destination for the encrypted data.
1777 * @param src Source of the plaintext.
1778 * @param size Size of the plaintext.
1779 * @param iv Initialization Vector to use.
1780 * @param fwd Is this a fwd message?
1783 tunnel_encrypt (struct MeshTunnel2 *t,
1784 void *dst, const void *src,
1785 size_t size, uint64_t iv, int fwd)
1787 memcpy (dst, src, size);
1792 * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
1793 * Decrypt data with the tunnel key.
1795 * @param t Tunnel whose key to use.
1796 * @param dst Destination for the plaintext.
1797 * @param src Source of the encrypted data.
1798 * @param size Size of the encrypted data.
1799 * @param iv Initialization Vector to use.
1800 * @param fwd Is this a fwd message?
1803 tunnel_decrypt (struct MeshTunnel2 *t,
1804 void *dst, const void *src,
1805 size_t size, uint64_t iv, int fwd)
1807 memcpy (dst, src, size);
1812 * Sends an already built message on a connection, properly registering
1813 * all used resources.
1815 * @param message Message to send. Function makes a copy of it.
1816 * If message is not hop-by-hop, decrements TTL of copy.
1817 * @param c Connection on which this message is transmitted.
1818 * @param ch Channel on which this message is transmitted, or NULL.
1819 * @param fwd Is this a fwd message?
1822 send_prebuilt_message_connection (const struct GNUNET_MessageHeader *message,
1823 struct MeshConnection *c,
1824 struct MeshChannel *ch,
1831 size = ntohs (message->size);
1832 data = GNUNET_malloc (size);
1833 memcpy (data, message, size);
1834 type = ntohs (message->type);
1835 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send %s (%u) on connection %s\n",
1836 GNUNET_MESH_DEBUG_M2S (type), size, GNUNET_h2s (&c->id));
1840 struct GNUNET_MESH_Encrypted *emsg;
1841 struct GNUNET_MESH_ACK *amsg;
1842 struct GNUNET_MESH_Poll *pmsg;
1843 struct GNUNET_MESH_ConnectionDestroy *dmsg;
1844 struct GNUNET_MESH_ConnectionBroken *bmsg;
1847 case GNUNET_MESSAGE_TYPE_MESH_FWD:
1848 case GNUNET_MESSAGE_TYPE_MESH_BCK:
1849 emsg = (struct GNUNET_MESH_Encrypted *) data;
1850 ttl = ntohl (emsg->ttl);
1853 GNUNET_break_op (0);
1857 emsg->ttl = htonl (ttl - 1);
1858 emsg->pid = htonl (fwd ? c->fwd_fc.next_pid++ : c->bck_fc.next_pid++);
1859 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " pid %u\n", ntohl (emsg->pid));
1862 case GNUNET_MESSAGE_TYPE_MESH_ACK:
1863 amsg = (struct GNUNET_MESH_ACK *) data;
1865 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", ntohl (amsg->ack));
1868 case GNUNET_MESSAGE_TYPE_MESH_POLL:
1869 pmsg = (struct GNUNET_MESH_Poll *) data;
1871 pmsg->pid = htonl (fwd ? c->fwd_fc.last_pid_sent : c->bck_fc.last_pid_sent);
1872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " poll %u\n", ntohl (pmsg->pid));
1875 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
1876 dmsg = (struct GNUNET_MESH_ConnectionDestroy *) data;
1881 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
1882 bmsg = (struct GNUNET_MESH_ConnectionBroken *) data;
1887 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
1888 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
1905 * Sends an already built message on a tunnel, choosing the best connection.
1907 * @param message Message to send. Function modifies it.
1908 * @param t Tunnel on which this message is transmitted.
1909 * @param ch Channel on which this message is transmitted.
1910 * @param fwd Is this a fwd message?
1913 send_prebuilt_message_tunnel (struct GNUNET_MESH_Encrypted *msg,
1914 struct MeshTunnel2 *t,
1915 struct MeshChannel *ch,
1918 struct MeshConnection *c;
1921 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send on Tunnel %s\n",
1923 c = tunnel_get_connection (t, fwd);
1926 GNUNET_break (GNUNET_YES == t->destroy);
1929 type = ntohs (msg->header.type);
1932 case GNUNET_MESSAGE_TYPE_MESH_FWD:
1933 case GNUNET_MESSAGE_TYPE_MESH_BCK:
1934 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
1935 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
1937 msg->ttl = htonl (default_ttl);
1940 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "unkown type %s\n",
1941 GNUNET_MESH_DEBUG_M2S (type));
1946 send_prebuilt_message_connection (&msg->header, c, ch, fwd);
1951 * Sends an already built message on a channel, properly registering
1952 * all used resources and encrypting the message with the tunnel's key.
1954 * @param message Message to send. Function makes a copy of it.
1955 * @param ch Channel on which this message is transmitted.
1956 * @param fwd Is this a fwd message?
1959 send_prebuilt_message_channel (const struct GNUNET_MessageHeader *message,
1960 struct MeshChannel *ch,
1963 struct GNUNET_MESH_Encrypted *msg;
1964 size_t size = ntohs (message->size);
1965 char *cbuf[sizeof (struct GNUNET_MESH_Encrypted) + size];
1969 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send on Channel %s:%X\n",
1970 peer2s (ch->t->peer), ch->gid);
1971 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %s\n",
1972 GNUNET_MESH_DEBUG_M2S (ntohs (message->type)));
1974 if (channel_is_terminal (ch, fwd))
1976 handle_decrypted (ch->t, message, fwd);
1980 type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD : GNUNET_MESSAGE_TYPE_MESH_BCK;
1981 iv = GNUNET_CRYPTO_random_u64 (GNUNET_CRYPTO_QUALITY_NONCE, UINT64_MAX);
1983 msg = (struct GNUNET_MESH_Encrypted *) cbuf;
1984 msg->header.type = htons (type);
1985 msg->header.size = htons (sizeof (struct GNUNET_MESH_Encrypted) + size);
1986 msg->iv = GNUNET_htonll (iv);
1987 tunnel_encrypt (ch->t, &msg[1], message, size, iv, fwd);
1988 send_prebuilt_message_tunnel (msg, ch->t, ch, fwd);
1993 * Sends a CREATE CONNECTION message for a path to a peer.
1994 * Changes the connection and tunnel states if necessary.
1996 * @param connection Connection to create.
1999 send_connection_create (struct MeshConnection *connection)
2001 struct MeshTunnel2 *t;
2004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send connection create\n");
2006 GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE,
2007 sizeof (struct GNUNET_MESH_ConnectionCreate) +
2008 (connection->path->length *
2009 sizeof (struct GNUNET_PeerIdentity)),
2014 (MESH_TUNNEL_SEARCHING == t->state || MESH_TUNNEL_NEW == t->state))
2015 tunnel_change_state (t, MESH_TUNNEL_WAITING);
2016 if (MESH_CONNECTION_NEW == connection->state)
2017 connection_change_state (connection, MESH_CONNECTION_SENT);
2022 * Sends a CONNECTION ACK message in reponse to a received CONNECTION_CREATE
2025 * @param connection Connection to confirm.
2026 * @param fwd Is this a fwd ACK? (First is bck (SYNACK), second is fwd (ACK))
2029 send_connection_ack (struct MeshConnection *connection, int fwd)
2031 struct MeshTunnel2 *t;
2034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Send connection ack\n");
2036 GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK,
2037 sizeof (struct GNUNET_MESH_ConnectionACK),
2041 if (MESH_TUNNEL_NEW == t->state)
2042 tunnel_change_state (t, MESH_TUNNEL_WAITING);
2047 * Core callback to write a pre-constructed data packet to core buffer
2049 * @param cls Closure (MeshTransmissionDescriptor with data in "data" member).
2050 * @param size Number of bytes available in buf.
2051 * @param buf Where the to write the message.
2053 * @return number of bytes written to buf
2056 send_core_data_raw (void *cls, size_t size, void *buf)
2058 struct GNUNET_MessageHeader *msg = cls;
2061 GNUNET_assert (NULL != msg);
2062 total_size = ntohs (msg->size);
2064 if (total_size > size)
2069 memcpy (buf, msg, total_size);
2076 * Function to send a create connection message to a peer.
2078 * @param c Connection to create.
2079 * @param size number of bytes available in buf
2080 * @param buf where the callee should write the message
2081 * @return number of bytes written to buf
2084 send_core_connection_create (struct MeshConnection *c, size_t size, void *buf)
2086 struct GNUNET_MESH_ConnectionCreate *msg;
2087 struct GNUNET_PeerIdentity *peer_ptr;
2088 struct MeshPeerPath *p = c->path;
2092 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending CONNECTION CREATE...\n");
2094 sizeof (struct GNUNET_MESH_ConnectionCreate) +
2095 p->length * sizeof (struct GNUNET_PeerIdentity);
2097 if (size < size_needed || NULL == buf)
2102 msg = (struct GNUNET_MESH_ConnectionCreate *) buf;
2103 msg->header.size = htons (size_needed);
2104 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE);
2107 peer_ptr = (struct GNUNET_PeerIdentity *) &msg[1];
2108 for (i = 0; i < p->length; i++)
2110 GNUNET_PEER_resolve (p->peers[i], peer_ptr++);
2113 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2114 "CONNECTION CREATE (%u bytes long) sent!\n", size_needed);
2120 * Creates a path ack message in buf and frees all unused resources.
2122 * @param c Connection to send an ACK on.
2123 * @param size number of bytes available in buf
2124 * @param buf where the callee should write the message
2126 * @return number of bytes written to buf
2129 send_core_connection_ack (struct MeshConnection *c, size_t size, void *buf)
2131 struct GNUNET_MESH_ConnectionACK *msg = buf;
2132 struct MeshTunnel2 *t = c->t;
2134 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Sending CONNECTION ACK...\n");
2135 GNUNET_assert (NULL != t);
2136 if (sizeof (struct GNUNET_MESH_ConnectionACK) > size)
2141 msg->header.size = htons (sizeof (struct GNUNET_MESH_ConnectionACK));
2142 msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK);
2146 /* TODO add signature */
2148 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CONNECTION ACK sent!\n");
2149 return sizeof (struct GNUNET_MESH_ConnectionACK);
2154 * Destroy the peer_info and free any allocated resources linked to it
2156 * @param peer The peer_info to destroy.
2158 * @return GNUNET_OK on success
2161 peer_destroy (struct MeshPeer *peer)
2163 struct GNUNET_PeerIdentity id;
2164 struct MeshPeerPath *p;
2165 struct MeshPeerPath *nextp;
2167 GNUNET_PEER_resolve (peer->id, &id);
2168 GNUNET_PEER_change_rc (peer->id, -1);
2171 GNUNET_CONTAINER_multihashmap_remove (peers, &id.hashPubKey, peer))
2174 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
2175 "removing peer %s, not in hashmap\n", GNUNET_i2s (&id));
2177 if (NULL != peer->dhtget)
2179 GNUNET_DHT_get_stop (peer->dhtget);
2181 p = peer->path_head;
2185 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2189 tunnel_destroy_empty (peer->tunnel);
2196 * Returns if peer is used (has a tunnel, is neighbor).
2198 * @peer Peer to check.
2200 * @return GNUNET_YES if peer is in use.
2203 peer_is_used (struct MeshPeer *peer)
2205 struct MeshPeerPath *p;
2207 if (NULL != peer->tunnel)
2210 for (p = peer->path_head; NULL != p; p = p->next)
2219 * Iterator over all the peers to get the oldest timestamp.
2221 * @param cls Closure (unsued).
2222 * @param key ID of the peer.
2223 * @param value Peer_Info of the peer.
2226 peer_get_oldest (void *cls,
2227 const struct GNUNET_HashCode *key,
2230 struct MeshPeer *p = value;
2231 struct GNUNET_TIME_Absolute *abs = cls;
2233 /* Don't count active peers */
2234 if (GNUNET_YES == peer_is_used (p))
2237 if (abs->abs_value_us < p->last_contact.abs_value_us)
2238 abs->abs_value_us = p->last_contact.abs_value_us;
2245 * Iterator over all the peers to remove the oldest entry.
2247 * @param cls Closure (unsued).
2248 * @param key ID of the peer.
2249 * @param value Peer_Info of the peer.
2252 peer_timeout (void *cls,
2253 const struct GNUNET_HashCode *key,
2256 struct MeshPeer *p = value;
2257 struct GNUNET_TIME_Absolute *abs = cls;
2259 if (p->last_contact.abs_value_us == abs->abs_value_us &&
2260 GNUNET_NO == peer_is_used (p))
2270 * Delete oldest unused peer.
2273 peer_delete_oldest (void)
2275 struct GNUNET_TIME_Absolute abs;
2277 abs = GNUNET_TIME_UNIT_FOREVER_ABS;
2279 GNUNET_CONTAINER_multihashmap_iterate (peers,
2282 GNUNET_CONTAINER_multihashmap_iterate (peers,
2289 * Retrieve the MeshPeer stucture associated with the peer, create one
2290 * and insert it in the appropriate structures if the peer is not known yet.
2292 * @param peer Full identity of the peer.
2294 * @return Existing or newly created peer info.
2296 static struct MeshPeer *
2297 peer_get (const struct GNUNET_PeerIdentity *peer_id)
2299 struct MeshPeer *peer;
2301 peer = GNUNET_CONTAINER_multihashmap_get (peers, &peer_id->hashPubKey);
2304 peer = GNUNET_new (struct MeshPeer);
2305 if (GNUNET_CONTAINER_multihashmap_size (peers) > max_peers)
2307 peer_delete_oldest ();
2309 GNUNET_CONTAINER_multihashmap_put (peers, &peer_id->hashPubKey, peer,
2310 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
2311 peer->id = GNUNET_PEER_intern (peer_id);
2313 peer->last_contact = GNUNET_TIME_absolute_get();
2320 * Retrieve the MeshPeer stucture associated with the peer, create one
2321 * and insert it in the appropriate structures if the peer is not known yet.
2323 * @param peer Short identity of the peer.
2325 * @return Existing or newly created peer info.
2327 static struct MeshPeer *
2328 peer_get_short (const GNUNET_PEER_Id peer)
2330 return peer_get (GNUNET_PEER_resolve2 (peer));
2335 * Get a cost of a path for a peer considering existing tunnel connections.
2337 * @param peer Peer towards which the path is considered.
2338 * @param path Candidate path.
2340 * @return Cost of the path (path length + number of overlapping nodes)
2343 peer_get_path_cost (const struct MeshPeer *peer,
2344 const struct MeshPeerPath *path)
2346 struct MeshConnection *c;
2347 unsigned int overlap;
2355 GNUNET_assert (NULL != peer->tunnel);
2357 for (i = 0; i < path->length; i++)
2359 for (c = peer->tunnel->connection_head; NULL != c; c = c->next)
2361 for (j = 0; j < c->path->length; j++)
2363 if (path->peers[i] == c->path->peers[j])
2371 return (path->length + overlap) * (path->score * -1);
2376 * Choose the best path towards a peer considering the tunnel properties.
2378 * @param peer The destination peer.
2380 * @return Best current known path towards the peer, if any.
2382 static struct MeshPeerPath *
2383 peer_get_best_path (const struct MeshPeer *peer)
2385 struct MeshPeerPath *best_p;
2386 struct MeshPeerPath *p;
2387 struct MeshConnection *c;
2388 unsigned int best_cost;
2391 best_cost = UINT_MAX;
2393 for (p = peer->path_head; NULL != p; p = p->next)
2395 for (c = peer->tunnel->connection_head; NULL != c; c = c->next)
2399 continue; /* If path is in use in a connection, skip it. */
2401 if ((cost = peer_get_path_cost (peer, p)) < best_cost)
2411 queue_is_sendable (struct MeshPeerQueue *q)
2413 struct MeshFlowControl *fc;
2415 /* Is PID-independent? */
2418 case GNUNET_MESSAGE_TYPE_MESH_ACK:
2419 case GNUNET_MESSAGE_TYPE_MESH_POLL:
2423 /* Is PID allowed? */
2424 fc = q->fwd ? &q->c->fwd_fc : &q->c->bck_fc;
2425 if (GMC_is_pid_bigger (fc->last_ack_recv, fc->last_pid_sent))
2433 * Get first sendable message.
2435 * @param peer The destination peer.
2437 * @return Best current known path towards the peer, if any.
2439 static struct MeshPeerQueue *
2440 peer_get_first_message (const struct MeshPeer *peer)
2442 struct MeshPeerQueue *q;
2444 for (q = peer->queue_head; NULL != q; q = q->next)
2446 if (queue_is_sendable (q))
2455 * Try to establish a new connection to this peer in the given tunnel.
2456 * If the peer doesn't have any path to it yet, try to get one.
2457 * If the peer already has some path, send a CREATE CONNECTION towards it.
2459 * @param peer PeerInfo of the peer.
2462 peer_connect (struct MeshPeer *peer)
2464 struct MeshTunnel2 *t;
2465 struct MeshPeerPath *p;
2466 struct MeshConnection *c;
2469 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2470 "peer_connect towards %s\n",
2474 rerun_dhtget = GNUNET_NO;
2476 if (NULL != peer->path_head)
2478 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "path exists\n");
2479 p = peer_get_best_path (peer);
2482 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u hops\n", p->length);
2483 c = tunnel_use_path (t, p);
2486 /* This case can happen when the path includes a first hop that is
2487 * not yet known to be connected.
2489 * This happens quite often during testing when running mesh
2490 * under valgrind: core connect notifications come very late and the
2491 * DHT result has already come and created a valid path.
2492 * In this case, the peer->connections hashmap will be NULL and
2493 * tunnel_use_path will not be able to create a connection from that
2496 * Re-running the DHT GET should give core time to callback.
2499 rerun_dhtget = GNUNET_YES;
2503 send_connection_create (c);
2509 if (NULL != peer->dhtget && GNUNET_YES == rerun_dhtget)
2511 GNUNET_DHT_get_stop (peer->dhtget);
2512 peer->dhtget = NULL;
2513 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2514 " Stopping DHT GET for peer %s\n", peer2s (peer));
2517 if (NULL == peer->dhtget)
2519 const struct GNUNET_PeerIdentity *id;
2521 id = GNUNET_PEER_resolve2 (peer->id);
2522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2523 " Starting DHT GET for peer %s\n", peer2s (peer));
2524 peer->dhtget = GNUNET_DHT_get_start (dht_handle, /* handle */
2525 GNUNET_BLOCK_TYPE_MESH_PEER, /* type */
2526 &id->hashPubKey, /* key to search */
2527 dht_replication_level, /* replication level */
2528 GNUNET_DHT_RO_RECORD_ROUTE |
2529 GNUNET_DHT_RO_DEMULTIPLEX_EVERYWHERE,
2531 0, /* xquery bits */
2532 &dht_get_id_handler, peer);
2533 if (MESH_TUNNEL_NEW == t->state)
2534 tunnel_change_state (t, MESH_TUNNEL_SEARCHING);
2540 * Get the first transmittable message for a connection.
2542 * @param c Connection.
2543 * @param fwd Is this FWD?
2545 * @return First transmittable message.
2547 static struct MeshPeerQueue *
2548 connection_get_first_message (struct MeshConnection *c, int fwd)
2550 struct MeshPeerQueue *q;
2553 p = connection_get_hop (c, fwd);
2555 for (q = p->queue_head; NULL != q; q = q->next)
2559 if (queue_is_sendable (q))
2568 * @brief Re-initiate traffic on this connection if necessary.
2570 * Check if there is traffic queued towards this peer
2571 * and the core transmit handle is NULL (traffic was stalled).
2572 * If so, call core tmt rdy.
2574 * @param c Connection on which initiate traffic.
2575 * @param fwd Is this about fwd traffic?
2578 connection_unlock_queue (struct MeshConnection *c, int fwd)
2580 struct MeshPeer *peer;
2581 struct MeshPeerQueue *q;
2584 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2585 "connection_unlock_queue %s on %s\n",
2586 fwd ? "FWD" : "BCK", GNUNET_h2s (&c->id));
2588 if (connection_is_origin (c, fwd))
2590 struct MeshTunnel2 *t = c->t;
2591 struct MeshChannel *ch;
2592 struct MeshChannelReliability *rel;
2594 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " is origin!\n");
2595 /* FIXME randomize channel selection, not always first channel */
2596 for (ch = t->channel_head; NULL != ch; ch = ch->next)
2598 rel = fwd ? ch->root_rel : ch->dest_rel;
2600 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " channel %X - %s\n",
2601 ch->gid, rel->client_ready ? "ready " : "not ready");
2602 if (GNUNET_NO == rel->client_ready)
2604 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending local ack!\n");
2605 send_local_ack (ch, fwd);
2606 return; /* FIXME authorize all channels? */
2612 peer = connection_get_hop (c, fwd);
2614 if (NULL != peer->core_transmit)
2616 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " already unlocked!\n");
2617 return; /* Already unlocked */
2620 q = connection_get_first_message (c, fwd);
2623 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " queue empty!\n");
2624 return; /* Nothing to transmit */
2628 peer->core_transmit =
2629 GNUNET_CORE_notify_transmit_ready (core_handle,
2632 GNUNET_TIME_UNIT_FOREVER_REL,
2633 GNUNET_PEER_resolve2 (peer->id),
2641 * Cancel all transmissions that belong to a certain connection.
2643 * @param c Connection which to cancel.
2644 * @param fwd Cancel fwd traffic?
2647 connection_cancel_queues (struct MeshConnection *c, int fwd)
2649 struct MeshPeerQueue *q;
2650 struct MeshPeerQueue *next;
2651 struct MeshFlowControl *fc;
2652 struct MeshPeer *peer;
2659 fc = fwd ? &c->fwd_fc : &c->bck_fc;
2660 peer = connection_get_hop (c, fwd);
2662 for (q = peer->queue_head; NULL != q; q = next)
2667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
2668 "connection_cancel_queue %s\n",
2669 GNUNET_MESH_DEBUG_M2S (q->type));
2670 queue_destroy (q, GNUNET_YES);
2673 if (NULL == peer->queue_head)
2675 if (NULL != peer->core_transmit)
2677 GNUNET_CORE_notify_transmit_ready_cancel (peer->core_transmit);
2678 peer->core_transmit = NULL;
2680 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
2682 GNUNET_SCHEDULER_cancel (fc->poll_task);
2683 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2690 * Remove all paths that rely on a direct connection between p1 and p2
2691 * from the peer itself and notify all tunnels about it.
2693 * @param peer PeerInfo of affected peer.
2694 * @param p1 GNUNET_PEER_Id of one peer.
2695 * @param p2 GNUNET_PEER_Id of another peer that was connected to the first and
2698 * FIXME use peer->connections!!!
2701 peer_remove_path (struct MeshPeer *peer, GNUNET_PEER_Id p1,
2704 struct MeshPeerPath *p;
2705 struct MeshPeerPath *next;
2706 struct MeshPeer *peer_d;
2708 unsigned int destroyed;
2711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path\n");
2713 for (p = peer->path_head; NULL != p; p = next)
2716 for (i = 0; i < (p->length - 1); i++)
2718 if ((p->peers[i] == p1 && p->peers[i + 1] == p2) ||
2719 (p->peers[i] == p2 && p->peers[i + 1] == p1))
2721 GNUNET_CONTAINER_DLL_remove (peer->path_head, peer->path_tail, p);
2731 d = tunnel_notify_connection_broken (peer->tunnel, p1, p2);
2733 peer_d = peer_get_short (d); // FIXME
2734 next = peer_get_best_path (peer_d);
2735 tunnel_use_path (peer->tunnel, next);
2736 peer_connect (peer_d);
2738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer_info_remove_path END\n");
2743 * Add the path to the peer and update the path used to reach it in case this
2746 * @param peer_info Destination peer to add the path to.
2747 * @param path New path to add. Last peer must be the peer in arg 1.
2748 * Path will be either used of freed if already known.
2749 * @param trusted Do we trust that this path is real?
2752 peer_add_path (struct MeshPeer *peer_info, struct MeshPeerPath *path,
2755 struct MeshPeerPath *aux;
2759 if ((NULL == peer_info) || (NULL == path))
2762 path_destroy (path);
2765 if (path->peers[path->length - 1] != peer_info->id)
2768 path_destroy (path);
2771 if (2 >= path->length && GNUNET_NO == trusted)
2773 /* Only allow CORE to tell us about direct paths */
2774 path_destroy (path);
2777 for (l = 1; l < path->length; l++)
2779 if (path->peers[l] == myid)
2781 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shortening path by %u\n", l);
2782 for (l2 = 0; l2 < path->length - l; l2++)
2784 path->peers[l2] = path->peers[l + l2];
2789 GNUNET_realloc (path->peers, path->length * sizeof (GNUNET_PEER_Id));
2793 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "adding path [%u] to peer %s\n",
2794 path->length, peer2s (peer_info));
2796 l = path_get_length (path);
2799 path_destroy (path);
2803 GNUNET_assert (peer_info->id == path->peers[path->length - 1]);
2804 for (aux = peer_info->path_head; aux != NULL; aux = aux->next)
2806 l2 = path_get_length (aux);
2809 GNUNET_CONTAINER_DLL_insert_before (peer_info->path_head,
2810 peer_info->path_tail, aux, path);
2815 if (l2 == l && memcmp (path->peers, aux->peers, l) == 0)
2817 path_destroy (path);
2822 GNUNET_CONTAINER_DLL_insert_tail (peer_info->path_head, peer_info->path_tail,
2829 * Add the path to the origin peer and update the path used to reach it in case
2830 * this is the shortest.
2831 * The path is given in peer_info -> destination, therefore we turn the path
2832 * upside down first.
2834 * @param peer_info Peer to add the path to, being the origin of the path.
2835 * @param path New path to add after being inversed.
2836 * Path will be either used or freed.
2837 * @param trusted Do we trust that this path is real?
2840 peer_add_path_to_origin (struct MeshPeer *peer_info,
2841 struct MeshPeerPath *path, int trusted)
2846 peer_add_path (peer_info, path, trusted);
2852 * Function called if a connection has been stalled for a while,
2853 * possibly due to a missed ACK. Poll the neighbor about its ACK status.
2855 * @param cls Closure (poll ctx).
2856 * @param tc TaskContext.
2859 connection_poll (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
2861 struct MeshFlowControl *fc = cls;
2862 struct GNUNET_MESH_Poll msg;
2863 struct MeshConnection *c;
2865 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
2866 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
2872 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** Polling!\n");
2873 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** connection %s[%X]\n",
2874 peer2s (c->t->peer), c->id);
2875 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** %s\n",
2876 fc == &c->fwd_fc ? "FWD" : "BCK");
2878 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_POLL);
2879 msg.header.size = htons (sizeof (msg));
2880 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " *** pid (%u)!\n", fc->last_pid_sent);
2881 send_prebuilt_message_connection (&msg.header, c, NULL, fc == &c->fwd_fc);
2882 fc->poll_time = GNUNET_TIME_STD_BACKOFF (fc->poll_time);
2883 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
2884 &connection_poll, fc);
2889 * Build a PeerPath from the paths returned from the DHT, reversing the paths
2890 * to obtain a local peer -> destination path and interning the peer ids.
2892 * @return Newly allocated and created path
2894 static struct MeshPeerPath *
2895 path_build_from_dht (const struct GNUNET_PeerIdentity *get_path,
2896 unsigned int get_path_length,
2897 const struct GNUNET_PeerIdentity *put_path,
2898 unsigned int put_path_length)
2900 struct MeshPeerPath *p;
2906 GNUNET_PEER_change_rc (myid, 1);
2907 i = get_path_length;
2908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " GET has %d hops.\n", i);
2909 for (i--; i >= 0; i--)
2911 id = GNUNET_PEER_intern (&get_path[i]);
2912 if (p->length > 0 && id == p->peers[p->length - 1])
2914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2915 GNUNET_PEER_change_rc (id, -1);
2919 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from GET: %s.\n",
2920 GNUNET_i2s (&get_path[i]));
2922 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2923 p->peers[p->length - 1] = id;
2926 i = put_path_length;
2927 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PUT has %d hops.\n", i);
2928 for (i--; i >= 0; i--)
2930 id = GNUNET_PEER_intern (&put_path[i]);
2933 /* PUT path went through us, so discard the path up until now and start
2934 * from here to get a much shorter (and loop-free) path.
2939 if (p->length > 0 && id == p->peers[p->length - 1])
2941 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Optimizing 1 hop out.\n");
2942 GNUNET_PEER_change_rc (id, -1);
2946 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Adding from PUT: %s.\n",
2947 GNUNET_i2s (&put_path[i]));
2949 p->peers = GNUNET_realloc (p->peers, sizeof (GNUNET_PEER_Id) * p->length);
2950 p->peers[p->length - 1] = id;
2954 if (get_path_length > 0)
2955 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of GET: %s)\n",
2956 GNUNET_i2s (&get_path[0]));
2957 if (put_path_length > 0)
2958 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (first of PUT: %s)\n",
2959 GNUNET_i2s (&put_path[0]));
2960 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " In total: %d hops\n",
2962 for (i = 0; i < p->length; i++)
2964 struct GNUNET_PeerIdentity peer_id;
2966 GNUNET_PEER_resolve (p->peers[i], &peer_id);
2967 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " %u: %s\n", p->peers[i],
2968 GNUNET_i2s (&peer_id));
2976 * Adds a path to the peer_infos of all the peers in the path
2978 * @param p Path to process.
2979 * @param confirmed Whether we know if the path works or not.
2982 path_add_to_peers (struct MeshPeerPath *p, int confirmed)
2986 /* TODO: invert and add */
2987 for (i = 0; i < p->length && p->peers[i] != myid; i++) /* skip'em */ ;
2988 for (i++; i < p->length; i++)
2990 struct MeshPeer *aux;
2991 struct MeshPeerPath *copy;
2993 aux = peer_get_short (p->peers[i]);
2994 copy = path_duplicate (p);
2995 copy->length = i + 1;
2996 peer_add_path (aux, copy, p->length < 3 ? GNUNET_NO : confirmed);
3002 * Search for a channel among the channels for a client
3004 * @param c the client whose channels to search in
3005 * @param chid the local id of the channel
3007 * @return channel handler, NULL if doesn't exist
3009 static struct MeshChannel *
3010 channel_get_by_local_id (struct MeshClient *c, MESH_ChannelNumber chid)
3012 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " -- get CHID %X\n", chid);
3013 if (0 == (chid & GNUNET_MESH_LOCAL_CHANNEL_ID_CLI))
3015 GNUNET_break_op (0);
3016 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CHID %X not a local chid\n", chid);
3019 if (chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV)
3020 return GNUNET_CONTAINER_multihashmap32_get (c->incoming_channels, chid);
3021 return GNUNET_CONTAINER_multihashmap32_get (c->own_channels, chid);
3027 channel_debug (struct MeshChannel *ch)
3031 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "*** DEBUG NULL CHANNEL ***\n");
3034 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Channel %s:%X\n",
3035 peer2s (ch->t->peer), ch->gid);
3036 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " root %p/%p\n",
3037 ch->root, ch->root_rel);
3038 if (NULL != ch->root)
3040 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " cli %u\n", ch->root->id);
3041 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ready %s\n",
3042 ch->root_rel->client_ready ? "YES" : "NO");
3043 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " id %X\n", ch->lid_root);
3045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " root %p/%p\n",
3046 ch->dest, ch->dest_rel);
3047 if (NULL != ch->dest)
3049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " cli %u\n", ch->dest->id);
3050 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ready %s\n",
3051 ch->dest_rel->client_ready ? "YES" : "NO");
3052 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " id %X\n", ch->lid_dest);
3057 fc_debug (struct MeshFlowControl *fc)
3059 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " IN: %u/%u\n",
3060 fc->last_pid_recv, fc->last_ack_sent);
3061 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " OUT: %u/%u\n",
3062 fc->last_pid_sent, fc->last_ack_recv);
3063 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " QUEUE: %u/%u\n",
3064 fc->queue_n, fc->queue_max);
3068 connection_debug (struct MeshConnection *c)
3072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "*** DEBUG NULL CONNECTION ***\n");
3075 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Connection %s:%X\n",
3076 peer2s (c->t->peer), GNUNET_h2s (&c->id));
3077 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " state: %u, pending msgs: %u\n",
3078 c->state, c->pending_messages);
3079 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD FC\n");
3080 fc_debug (&c->fwd_fc);
3081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK FC\n");
3082 fc_debug (&c->bck_fc);
3087 static struct MeshChannel *
3088 channel_get (struct MeshTunnel2 *t, MESH_ChannelNumber chid)
3090 struct MeshChannel *ch;
3095 for (ch = t->channel_head; NULL != ch; ch = ch->next)
3097 if (ch->gid == chid)
3106 * Change the tunnel state.
3108 * @param t Tunnel whose state to change.
3109 * @param state New state.
3112 tunnel_change_state (struct MeshTunnel2* t, enum MeshTunnelState state)
3116 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3117 "Tunnel %s state was %s\n",
3119 GNUNET_MESH_DEBUG_TS2S (t->state));
3120 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3121 "Tunnel %s state is now %s\n",
3123 GNUNET_MESH_DEBUG_TS2S (state));
3129 * Cache a message to be sent once tunnel is online.
3131 * @param t Tunnel to hold the message.
3132 * @param ch Channel the message is about.
3133 * @param msg Message itself (copy will be made).
3134 * @param fwd Is this fwd?
3137 tunnel_queue_data (struct MeshTunnel2 *t,
3138 struct MeshChannel *ch,
3139 struct GNUNET_MessageHeader *msg,
3142 struct MeshTunnelQueue *tq;
3143 uint16_t size = ntohs (msg->size);
3145 tq = GNUNET_malloc (sizeof (struct MeshTunnelQueue) + size);
3148 memcpy (&tq[1], msg, size);
3149 GNUNET_CONTAINER_DLL_insert_tail (t->tq_head, t->tq_tail, tq);
3154 * Send all cached messages that we can, tunnel is online.
3156 * @param t Tunnel that holds the messages.
3157 * @param fwd Is this fwd?
3160 tunnel_send_queued_data (struct MeshTunnel2 *t, int fwd)
3162 struct MeshTunnelQueue *tq;
3163 struct MeshTunnelQueue *next;
3166 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3167 "tunnel_send_queued_data on tunnel %s\n",
3169 room = tunnel_get_buffer (t, fwd);
3170 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " buffer space: %u\n", room);
3171 for (tq = t->tq_head; NULL != tq && room > 0; tq = next)
3175 GNUNET_CONTAINER_DLL_remove (t->tq_head, t->tq_tail, tq);
3176 send_prebuilt_message_channel ((struct GNUNET_MessageHeader *) &tq[1],
3185 connection_change_state (struct MeshConnection* c,
3186 enum MeshConnectionState state)
3188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3189 "Connection %s state was %s\n",
3190 GNUNET_h2s (&c->id), GNUNET_MESH_DEBUG_CS2S (c->state));
3191 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3192 "Connection %s state is now %s\n",
3193 GNUNET_h2s (&c->id), GNUNET_MESH_DEBUG_CS2S (state));
3199 * Add a client to a channel, initializing all needed data structures.
3201 * @param ch Channel to which add the client.
3202 * @param c Client which to add to the channel.
3205 channel_add_client (struct MeshChannel *ch, struct MeshClient *c)
3207 struct MeshTunnel2 *t = ch->t;
3209 if (NULL != ch->dest)
3215 /* Assign local id as destination */
3216 while (NULL != channel_get_by_local_id (c, t->next_local_chid))
3217 t->next_local_chid = (t->next_local_chid + 1) | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
3218 ch->lid_dest = t->next_local_chid++;
3219 t->next_local_chid = t->next_local_chid | GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
3221 /* Store in client's hashmap */
3223 GNUNET_CONTAINER_multihashmap32_put (c->incoming_channels,
3225 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
3231 GNUNET_break (NULL == ch->dest_rel);
3232 ch->dest_rel = GNUNET_new (struct MeshChannelReliability);
3233 ch->dest_rel->ch = ch;
3234 ch->dest_rel->expected_delay = MESH_RETRANSMIT_TIME;
3240 static struct MeshConnection *
3241 tunnel_use_path (struct MeshTunnel2 *t, struct MeshPeerPath *p)
3243 struct MeshConnection *c;
3244 struct GNUNET_HashCode cid;
3245 struct MeshPeer *peer;
3246 unsigned int own_pos;
3248 GNUNET_CRYPTO_hash_create_random (GNUNET_CRYPTO_QUALITY_NONCE, &cid);
3250 c = connection_new (&cid);
3252 GNUNET_CONTAINER_DLL_insert (t->connection_head, t->connection_tail, c);
3253 for (own_pos = 0; own_pos < p->length; own_pos++)
3255 if (p->peers[own_pos] == myid)
3258 if (own_pos > p->length - 1)
3261 connection_destroy (c);
3264 c->own_pos = own_pos;
3269 c->fwd_maintenance_task =
3270 GNUNET_SCHEDULER_add_delayed (refresh_connection_time,
3271 &connection_fwd_keepalive, c);
3274 peer = connection_get_next_hop (c);
3275 if (NULL == peer->connections)
3277 connection_destroy (c);
3280 GNUNET_CONTAINER_multihashmap_put (peer->connections, &c->id, c,
3281 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
3282 peer = connection_get_prev_hop (c);
3283 if (NULL == peer->connections)
3285 connection_destroy (c);
3288 GNUNET_CONTAINER_multihashmap_put (peer->connections, &c->id, c,
3289 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
3295 * Notifies a tunnel that a connection has broken that affects at least
3296 * some of its peers. Sends a notification towards the root of the tree.
3297 * In case the peer is the owner of the tree, notifies the client that owns
3298 * the tunnel and tries to reconnect.
3300 * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME
3302 * @param t Tunnel affected.
3303 * @param p1 Peer that got disconnected from p2.
3304 * @param p2 Peer that got disconnected from p1.
3306 * @return Short ID of the peer disconnected (either p1 or p2).
3307 * 0 if the tunnel remained unaffected.
3309 static GNUNET_PEER_Id
3310 tunnel_notify_connection_broken (struct MeshTunnel2* t,
3311 GNUNET_PEER_Id p1, GNUNET_PEER_Id p2)
3313 // if (myid != p1 && myid != p2) FIXME
3318 // if (tree_get_predecessor (t->tree) != 0)
3320 // /* We are the peer still connected, notify owner of the disconnection. */
3321 // struct GNUNET_MESH_PathBroken msg;
3322 // struct GNUNET_PeerIdentity neighbor;
3324 // msg.header.size = htons (sizeof (msg));
3325 // msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_PATH_BROKEN);
3326 // GNUNET_PEER_resolve (t->id.oid, &msg.oid);
3327 // msg.tid = htonl (t->id.tid);
3328 // msg.peer1 = my_full_id;
3329 // GNUNET_PEER_resolve (pid, &msg.peer2);
3330 // GNUNET_PEER_resolve (tree_get_predecessor (t->tree), &neighbor);
3331 // send_prebuilt_message (&msg.header, &neighbor, t);
3338 * Send an end-to-end ACK message for the most recent in-sequence payload.
3340 * If channel is not reliable, do nothing.
3342 * @param ch Channel this is about.
3343 * @param fwd Is for FWD traffic? (ACK dest->owner)
3346 channel_send_data_ack (struct MeshChannel *ch, int fwd)
3348 struct GNUNET_MESH_DataACK msg;
3349 struct MeshChannelReliability *rel;
3350 struct MeshReliableMessage *copy;
3355 if (GNUNET_NO == ch->reliable)
3359 rel = fwd ? ch->dest_rel : ch->root_rel;
3360 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3361 "send_data_ack for %u\n",
3364 type = GNUNET_MESSAGE_TYPE_MESH_DATA_ACK;
3365 msg.header.type = htons (type);
3366 msg.header.size = htons (sizeof (msg));
3367 msg.chid = htonl (ch->gid);
3368 msg.mid = htonl (rel->mid_recv - 1);
3370 for (copy = rel->head_recv; NULL != copy; copy = copy->next)
3372 if (copy->type != type)
3374 delta = copy->mid - rel->mid_recv;
3377 mask = 0x1LL << delta;
3378 msg.futures |= mask;
3379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3380 " setting bit for %u (delta %u) (%llX) -> %llX\n",
3381 copy->mid, delta, mask, msg.futures);
3383 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " final futures %llX\n", msg.futures);
3385 send_prebuilt_message_channel (&msg.header, ch, fwd);
3386 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_data_ack END\n");
3391 * Send an ACK informing the predecessor about the available buffer space.
3393 * Note that for fwd ack, the FWD mean forward *traffic* (root->dest),
3394 * the ACK itself goes "back" (dest->root).
3396 * @param c Connection on which to send the ACK.
3397 * @param buffer How much space free to advertise?
3398 * @param fwd Is this FWD ACK? (Going dest->owner)
3401 connection_send_ack (struct MeshConnection *c, unsigned int buffer, int fwd)
3403 struct MeshFlowControl *next_fc;
3404 struct MeshFlowControl *prev_fc;
3405 struct GNUNET_MESH_ACK msg;
3409 next_fc = fwd ? &c->fwd_fc : &c->bck_fc;
3410 prev_fc = fwd ? &c->bck_fc : &c->fwd_fc;
3412 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3413 "connection send %s ack on %s\n",
3414 fwd ? "FWD" : "BCK", GNUNET_h2s (&c->id));
3416 /* Check if we need to transmit the ACK */
3417 if (prev_fc->last_ack_sent - prev_fc->last_pid_recv > 3)
3419 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending ACK, buffer > 3\n");
3420 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3421 " last pid recv: %u, last ack sent: %u\n",
3422 prev_fc->last_pid_recv, prev_fc->last_ack_sent);
3426 /* Ok, ACK might be necessary, what PID to ACK? */
3427 delta = next_fc->queue_max - next_fc->queue_n;
3428 ack = prev_fc->last_pid_recv + delta;
3429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
3430 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3431 " last pid %u, last ack %u, qmax %u, q %u\n",
3432 prev_fc->last_pid_recv, prev_fc->last_ack_sent,
3433 next_fc->queue_max, next_fc->queue_n);
3434 if (ack == prev_fc->last_ack_sent)
3436 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Not sending FWD ACK, not needed\n");
3440 prev_fc->last_ack_sent = ack;
3442 /* Build ACK message and send on connection */
3443 msg.header.size = htons (sizeof (msg));
3444 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_ACK);
3445 msg.ack = htonl (ack);
3448 send_prebuilt_message_connection (&msg.header, c, NULL, !fwd);
3453 * Modify the mesh message TID from global to local and send to client.
3455 * @param ch Channel on which to send the message.
3456 * @param msg Message to modify and send.
3457 * @param c Client to send to.
3458 * @param tid Tunnel ID to use (c can be both owner and client).
3461 channel_send_client_to_tid (struct MeshChannel *ch,
3462 const struct GNUNET_MESH_Data *msg,
3463 struct MeshClient *c, MESH_ChannelNumber id)
3465 struct GNUNET_MESH_LocalData *copy;
3466 uint16_t size = ntohs (msg->header.size) - sizeof (struct GNUNET_MESH_Data);
3467 char cbuf[size + sizeof (struct GNUNET_MESH_LocalData)];
3469 if (size < sizeof (struct GNUNET_MessageHeader))
3471 GNUNET_break_op (0);
3479 copy = (struct GNUNET_MESH_LocalData *) cbuf;
3480 memcpy (©[1], &msg[1], size);
3481 copy->header.size = htons (sizeof (struct GNUNET_MESH_LocalData) + size);
3482 copy->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA);
3483 copy->id = htonl (id);
3484 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
3485 ©->header, GNUNET_NO);
3490 * We have received a message out of order, or the client is not ready.
3491 * Buffer it until we receive an ACK from the client or the missing
3492 * message from the channel.
3494 * @param msg Message to buffer (MUST be of type MESH_DATA).
3495 * @param rel Reliability data to the corresponding direction.
3498 channel_rel_add_buffered_data (const struct GNUNET_MESH_Data *msg,
3499 struct MeshChannelReliability *rel)
3501 struct MeshReliableMessage *copy;
3502 struct MeshReliableMessage *prev;
3506 size = ntohs (msg->header.size);
3507 mid = ntohl (msg->mid);
3509 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data %u\n", mid);
3511 copy = GNUNET_malloc (sizeof (*copy) + size);
3514 memcpy (©[1], msg, size);
3518 // FIXME do something better than O(n), although n < 64...
3519 // FIXME start from the end (most messages are the latest ones)
3520 for (prev = rel->head_recv; NULL != prev; prev = prev->next)
3522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prev %u\n", prev->mid);
3523 if (GMC_is_pid_bigger (prev->mid, mid))
3525 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " bingo!\n");
3526 GNUNET_CONTAINER_DLL_insert_before (rel->head_recv, rel->tail_recv,
3531 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " insert at tail!\n");
3532 GNUNET_CONTAINER_DLL_insert_tail (rel->head_recv, rel->tail_recv, copy);
3533 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "add_buffered_data END\n");
3538 channel_send_client_data (struct MeshChannel *ch,
3539 const struct GNUNET_MESH_Data *msg,
3544 if (ch->dest_rel->client_ready)
3545 channel_send_client_to_tid (ch, msg, ch->dest, ch->lid_dest);
3547 channel_rel_add_buffered_data (msg, ch->dest_rel);
3551 if (ch->root_rel->client_ready)
3552 channel_send_client_to_tid (ch, msg, ch->root, ch->lid_root);
3554 channel_rel_add_buffered_data (msg, ch->root_rel);
3560 * Send a buffered message to the client, for in order delivery or
3561 * as result of client ACK.
3563 * @param ch Channel on which to empty the message buffer.
3564 * @param c Client to send to.
3565 * @param rel Reliability structure to corresponding peer.
3566 * If rel == bck_rel, this is FWD data.
3569 channel_send_client_buffered_data (struct MeshChannel *ch,
3570 struct MeshClient *c,
3573 struct MeshReliableMessage *copy;
3574 struct MeshChannelReliability *rel;
3576 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data\n");
3577 rel = fwd ? ch->dest_rel : ch->root_rel;
3578 if (GNUNET_NO == rel->client_ready)
3580 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client not ready\n");
3584 copy = rel->head_recv;
3585 /* We never buffer channel management messages */
3588 if (copy->mid == rel->mid_recv || GNUNET_NO == ch->reliable)
3590 struct GNUNET_MESH_Data *msg = (struct GNUNET_MESH_Data *) ©[1];
3592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3593 " have %u! now expecting %u\n",
3594 copy->mid, rel->mid_recv + 1);
3595 channel_send_client_data (ch, msg, fwd);
3598 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
3603 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3604 " reliable && don't have %u, next is %u\n",
3610 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "send_buffered_data END\n");
3615 * Destroy a reliable message after it has been acknowledged, either by
3616 * direct mid ACK or bitfield. Updates the appropriate data structures and
3617 * timers and frees all memory.
3619 * @param copy Message that is no longer needed: remote peer got it.
3622 rel_message_free (struct MeshReliableMessage *copy)
3624 struct MeshChannelReliability *rel;
3625 struct GNUNET_TIME_Relative time;
3628 time = GNUNET_TIME_absolute_get_duration (copy->timestamp);
3629 rel->expected_delay.rel_value_us *= 7;
3630 rel->expected_delay.rel_value_us += time.rel_value_us;
3631 rel->expected_delay.rel_value_us /= 8;
3633 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Freeing %u\n", copy->mid);
3634 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
3635 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! took %s\n",
3636 GNUNET_STRINGS_relative_time_to_string (time, GNUNET_NO));
3637 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! new expected delay %s\n",
3638 GNUNET_STRINGS_relative_time_to_string (rel->expected_delay,
3640 rel->retry_timer = rel->expected_delay;
3641 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
3647 * Destroy all reliable messages queued for a channel,
3648 * during a channel destruction.
3649 * Frees the reliability structure itself.
3651 * @param rel Reliability data for a channel.
3654 channel_rel_free_all (struct MeshChannelReliability *rel)
3656 struct MeshReliableMessage *copy;
3657 struct MeshReliableMessage *next;
3662 for (copy = rel->head_recv; NULL != copy; copy = next)
3665 GNUNET_CONTAINER_DLL_remove (rel->head_recv, rel->tail_recv, copy);
3668 for (copy = rel->head_sent; NULL != copy; copy = next)
3671 GNUNET_CONTAINER_DLL_remove (rel->head_sent, rel->tail_sent, copy);
3674 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
3675 GNUNET_SCHEDULER_cancel (rel->retry_task);
3681 * Mark future messages as ACK'd.
3683 * @param rel Reliability data.
3684 * @param msg DataACK message with a bitfield of future ACK'd messages.
3687 channel_rel_free_sent (struct MeshChannelReliability *rel,
3688 const struct GNUNET_MESH_DataACK *msg)
3690 struct MeshReliableMessage *copy;
3691 struct MeshReliableMessage *next;
3698 bitfield = msg->futures;
3699 mid = ntohl (msg->mid);
3700 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3701 "free_sent_reliable %u %llX\n",
3703 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3704 " rel %p, head %p\n",
3705 rel, rel->head_sent);
3706 for (i = 0, copy = rel->head_sent;
3707 i < 64 && NULL != copy && 0 != bitfield;
3710 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3711 " trying bit %u (mid %u)\n",
3714 if (0 == (bitfield & mask))
3717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " set!\n");
3718 /* Bit was set, clear the bit from the bitfield */
3721 /* The i-th bit was set. Do we have that copy? */
3722 /* Skip copies with mid < target */
3723 target = mid + i + 1;
3724 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " target %u\n", target);
3725 while (NULL != copy && GMC_is_pid_bigger (target, copy->mid))
3728 /* Did we run out of copies? (previously freed, it's ok) */
3731 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "run out of copies...\n");
3735 /* Did we overshoot the target? (previously freed, it's ok) */
3736 if (GMC_is_pid_bigger (copy->mid, target))
3738 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " next copy %u\n", copy->mid);
3742 /* Now copy->mid == target, free it */
3744 rel_message_free (copy);
3747 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "free_sent_reliable END\n");
3752 * We haven't received an ACK after a certain time: restransmit the message.
3754 * @param cls Closure (MeshReliableMessage with the message to restransmit)
3755 * @param tc TaskContext.
3758 channel_retransmit_message (void *cls,
3759 const struct GNUNET_SCHEDULER_TaskContext *tc)
3761 struct MeshChannelReliability *rel = cls;
3762 struct MeshReliableMessage *copy;
3763 struct MeshPeerQueue *q;
3764 struct MeshChannel *ch;
3765 struct MeshConnection *c;
3766 struct GNUNET_MESH_Data *payload;
3767 struct MeshPeer *hop;
3770 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
3771 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
3775 copy = rel->head_sent;
3782 /* Search the message to be retransmitted in the outgoing queue.
3783 * Check only the queue for the connection that is going to be used,
3784 * if the message is stuck in some other connection's queue we shouldn't
3786 * - cancelling it and sending the new one doesn't guarantee it's delivery,
3787 * the old connection could be temporary stalled or the queue happened to
3788 * be long at time of insertion.
3789 * - not sending the new one could cause terrible delays the old connection
3792 payload = (struct GNUNET_MESH_Data *) ©[1];
3793 fwd = (rel == ch->root_rel);
3794 c = tunnel_get_connection (ch->t, fwd);
3795 hop = connection_get_hop (c, fwd);
3796 for (q = hop->queue_head; NULL != q; q = q->next)
3798 if (ntohs (payload->header.type) == q->type && ch == q->ch)
3800 struct GNUNET_MESH_Data *queued_data = q->cls;
3802 if (queued_data->mid == payload->mid)
3807 /* Message not found in the queue that we are going to use. */
3810 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RETRANSMIT %u\n", copy->mid);
3812 send_prebuilt_message_channel (&payload->header, ch, fwd);
3813 GNUNET_STATISTICS_update (stats, "# data retransmitted", 1, GNUNET_NO);
3817 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! ALREADY IN QUEUE %u\n", copy->mid);
3820 rel->retry_timer = GNUNET_TIME_STD_BACKOFF (rel->retry_timer);
3821 rel->retry_task = GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
3822 &channel_retransmit_message,
3828 * Send ACK on one or more connections due to buffer space to the client.
3830 * Iterates all connections of the tunnel and sends ACKs appropriately.
3832 * @param ch Channel which has some free buffer space.
3833 * @param fwd Is this in for FWD traffic? (ACK goes dest->root)
3836 channel_send_connections_ack (struct MeshChannel *ch,
3837 unsigned int buffer,
3840 struct MeshTunnel2 *t = ch->t;
3841 struct MeshConnection *c;
3842 struct MeshFlowControl *fc;
3845 uint32_t allow_per_connection;
3848 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3849 "Channel send connection %s ack on %s:%X\n",
3850 fwd ? "FWD" : "BCK", peer2s (ch->t->peer), ch->gid);
3852 /* Count connections, how many messages are already allowed */
3853 for (cs = 0, allowed = 0, c = t->connection_head; NULL != c; c = c->next)
3855 fc = fwd ? &c->fwd_fc : &c->bck_fc;
3856 if (GMC_is_pid_bigger(fc->last_pid_recv, fc->last_ack_sent))
3861 allowed += fc->last_ack_sent - fc->last_pid_recv;
3865 /* Make sure there is no overflow */
3866 if (allowed > buffer)
3872 /* Authorize connections to send more data */
3873 to_allow = buffer - allowed;
3875 for (c = t->connection_head; NULL != c && to_allow > 0; c = c->next)
3877 allow_per_connection = to_allow/cs;
3878 to_allow -= allow_per_connection;
3880 fc = fwd ? &c->fwd_fc : &c->bck_fc;
3881 if (fc->last_ack_sent - fc->last_pid_recv > 64 / 3)
3885 connection_send_ack (c, allow_per_connection, fwd);
3888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3889 "Channel send connection %s ack on %s:%X\n",
3890 fwd ? "FWD" : "BCK", peer2s (ch->t->peer), ch->gid);
3891 GNUNET_break (to_allow == 0);
3896 * Send an ACK on the appropriate connection/channel, depending on
3897 * the direction and the position of the peer.
3899 * @param c Which connection to send the hop-by-hop ACK.
3900 * @param ch Channel, if any.
3901 * @param fwd Is this a fwd ACK? (will go dest->root)
3904 send_ack (struct MeshConnection *c, struct MeshChannel *ch, int fwd)
3906 unsigned int buffer;
3908 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3909 "send ack %s on %p %p\n",
3910 fwd ? "FWD" : "BCK", c, ch);
3911 if (NULL == c || connection_is_terminal (c, fwd))
3913 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " getting from Channel\n");
3914 buffer = tunnel_get_buffer (NULL == c ? ch->t : c->t, fwd);
3918 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " getting from Connection\n");
3919 GNUNET_assert (NULL != c);
3920 buffer = connection_get_buffer (c, fwd);
3922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " buffer available: %u\n", buffer);
3926 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending on all connections\n");
3927 GNUNET_assert (NULL != ch);
3928 channel_send_connections_ack (ch, buffer, fwd);
3930 else if (connection_is_origin (c, fwd))
3932 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending on channel...\n");
3935 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " really sending!\n");
3936 GNUNET_assert (NULL != ch);
3937 send_local_ack (ch, fwd);
3942 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending on connection\n");
3943 connection_send_ack (c, buffer, fwd);
3949 * Channel was ACK'd by remote peer, mark as ready and cancel retransmission.
3951 * @param ch Channel to mark as ready.
3952 * @param fwd Was the CREATE message sent fwd?
3955 channel_confirm (struct MeshChannel *ch, int fwd)
3957 struct MeshChannelReliability *rel;
3958 struct MeshReliableMessage *copy;
3959 struct MeshReliableMessage *next;
3961 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
3962 " channel confirm %s %s:%X\n",
3963 fwd ? "FWD" : "BCK", peer2s (ch->t->peer), ch->gid);
3964 ch->state = MESH_CHANNEL_READY;
3966 rel = fwd ? ch->root_rel : ch->dest_rel;
3967 for (copy = rel->head_sent; NULL != copy; copy = next)
3969 struct GNUNET_MessageHeader *msg;
3972 msg = (struct GNUNET_MessageHeader *) ©[1];
3973 if (ntohs (msg->type) == GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE)
3975 rel_message_free (copy);
3979 if (GNUNET_NO == rel->client_ready)
3980 send_local_ack (ch, fwd);
3985 * Save a copy to retransmit in case it gets lost.
3987 * Initializes all needed callbacks and timers.
3989 * @param ch Channel this message goes on.
3990 * @param msg Message to copy.
3991 * @param fwd Is this fwd traffic?
3994 channel_save_copy (struct MeshChannel *ch,
3995 const struct GNUNET_MessageHeader *msg,
3998 struct MeshChannelReliability *rel;
3999 struct MeshReliableMessage *copy;
4004 rel = fwd ? ch->root_rel : ch->dest_rel;
4005 mid = rel->mid_send;
4006 type = ntohs (msg->type);
4007 size = ntohs (msg->size);
4009 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! SAVE %u\n", mid);
4010 copy = GNUNET_malloc (sizeof (struct MeshReliableMessage) + size);
4012 copy->timestamp = GNUNET_TIME_absolute_get ();
4015 memcpy (©[1], msg, size);
4017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " n_sent %u\n", rel->n_sent);
4018 GNUNET_CONTAINER_DLL_insert_tail (rel->head_sent, rel->tail_sent, copy);
4019 if (GNUNET_SCHEDULER_NO_TASK == rel->retry_task)
4022 GNUNET_TIME_relative_multiply (rel->expected_delay,
4023 MESH_RETRANSMIT_MARGIN);
4025 GNUNET_SCHEDULER_add_delayed (rel->retry_timer,
4026 &channel_retransmit_message,
4033 * Send keepalive packets for a connection.
4035 * @param c Connection to keep alive..
4036 * @param fwd Is this a FWD keepalive? (owner -> dest).
4039 connection_keepalive (struct MeshConnection *c, int fwd)
4041 struct GNUNET_MESH_ConnectionKeepAlive *msg;
4042 size_t size = sizeof (struct GNUNET_MESH_ConnectionKeepAlive);
4046 type = fwd ? GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE :
4047 GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE;
4049 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4050 "sending %s keepalive for connection %s[%d]\n",
4051 fwd ? "FWD" : "BCK",
4052 peer2s (c->t->peer),
4055 msg = (struct GNUNET_MESH_ConnectionKeepAlive *) cbuf;
4056 msg->header.size = htons (size);
4057 msg->header.type = htons (type);
4060 send_prebuilt_message_connection (&msg->header, c, NULL, fwd);
4065 * Send CONNECTION_{CREATE/ACK} packets for a connection.
4067 * @param c Connection for which to send the message.
4068 * @param fwd If GNUNET_YES, send CREATE, otherwise send ACK.
4071 connection_recreate (struct MeshConnection *c, int fwd)
4073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sending connection recreate\n");
4075 send_connection_create (c);
4077 send_connection_ack (c, GNUNET_NO);
4082 * Generic connection timer management.
4083 * Depending on the role of the peer in the connection will send the
4084 * appropriate message (build or keepalive)
4086 * @param c Conncetion to maintain.
4087 * @param fwd Is FWD?
4090 connection_maintain (struct MeshConnection *c, int fwd)
4092 if (MESH_TUNNEL_SEARCHING == c->t->state)
4094 /* TODO DHT GET with RO_BART */
4099 case MESH_CONNECTION_NEW:
4101 case MESH_CONNECTION_SENT:
4102 connection_recreate (c, fwd);
4104 case MESH_CONNECTION_READY:
4105 connection_keepalive (c, fwd);
4114 connection_fwd_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4116 struct MeshConnection *c = cls;
4118 c->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
4119 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4122 connection_maintain (c, GNUNET_YES);
4123 c->fwd_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_connection_time,
4124 &connection_fwd_keepalive,
4130 connection_bck_keepalive (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
4132 struct MeshConnection *c = cls;
4134 c->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
4135 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4138 connection_maintain (c, GNUNET_NO);
4139 c->bck_maintenance_task = GNUNET_SCHEDULER_add_delayed (refresh_connection_time,
4140 &connection_bck_keepalive,
4146 * Send a message to all peers in this connection that the connection
4147 * is no longer valid.
4149 * If some peer should not receive the message, it should be zero'ed out
4150 * before calling this function.
4152 * @param c The connection whose peers to notify.
4155 connection_send_destroy (struct MeshConnection *c)
4157 struct GNUNET_MESH_ConnectionDestroy msg;
4159 msg.header.size = htons (sizeof (msg));
4160 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY);;
4162 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4163 " sending connection destroy for connection %s[%X]\n",
4164 peer2s (c->t->peer),
4167 if (GNUNET_NO == connection_is_terminal (c, GNUNET_YES))
4168 send_prebuilt_message_connection (&msg.header, c, NULL, GNUNET_YES);
4169 if (GNUNET_NO == connection_is_terminal (c, GNUNET_NO))
4170 send_prebuilt_message_connection (&msg.header, c, NULL, GNUNET_NO);
4171 c->destroy = GNUNET_YES;
4176 * Confirm we got a channel create.
4178 * @param ch The channel to confirm.
4179 * @param fwd Should we send the ACK fwd?
4182 channel_send_ack (struct MeshChannel *ch, int fwd)
4184 struct GNUNET_MESH_ChannelManage msg;
4186 msg.header.size = htons (sizeof (msg));
4187 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_ACK);
4188 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4189 " sending channel ack for channel %s:%X\n",
4190 peer2s (ch->t->peer),
4193 msg.chid = htonl (ch->gid);
4194 send_prebuilt_message_channel (&msg.header, ch, fwd);
4199 * Send a message to all clients (local and remote) of this channel
4200 * notifying that the channel is no longer valid.
4202 * If some peer or client should not receive the message,
4203 * should be zero'ed out before calling this function.
4205 * @param ch The channel whose clients to notify.
4208 channel_send_destroy (struct MeshChannel *ch)
4210 struct GNUNET_MESH_ChannelManage msg;
4212 msg.header.size = htons (sizeof (msg));
4213 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY);
4214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4215 " sending channel destroy for channel %s:%X\n",
4216 peer2s (ch->t->peer),
4219 if (channel_is_terminal (ch, GNUNET_NO))
4221 if (NULL != ch->root && GNUNET_NO == ch->root->shutting_down)
4223 msg.chid = htonl (ch->lid_root);
4224 send_local_channel_destroy (ch, GNUNET_NO);
4229 msg.chid = htonl (ch->gid);
4230 send_prebuilt_message_channel (&msg.header, ch, GNUNET_NO);
4233 if (channel_is_terminal (ch, GNUNET_YES))
4235 if (NULL != ch->dest && GNUNET_NO == ch->dest->shutting_down)
4237 msg.chid = htonl (ch->lid_dest);
4238 send_local_channel_destroy (ch, GNUNET_YES);
4243 msg.chid = htonl (ch->gid);
4244 send_prebuilt_message_channel (&msg.header, ch, GNUNET_YES);
4252 static struct MeshTunnel2 *
4255 struct MeshTunnel2 *t;
4257 t = GNUNET_new (struct MeshTunnel2);
4259 t->next_local_chid = GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
4261 // GNUNET_CONTAINER_multihashmap_put (tunnels, tid, t,
4262 // GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST))
4264 // GNUNET_break (0);
4265 // tunnel_destroy (t);
4269 // char salt[] = "salt";
4270 // GNUNET_CRYPTO_kdf (&t->e_key, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
4271 // salt, sizeof (salt),
4272 // &t->e_key, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
4273 // &my_full_id, sizeof (struct GNUNET_PeerIdentity),
4274 // GNUNET_PEER_resolve2 (t->peer->id), sizeof (struct GNUNET_PeerIdentity),
4276 // GNUNET_CRYPTO_kdf (&t->d_key, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
4277 // salt, sizeof (salt),
4278 // &t->d_key, sizeof (struct GNUNET_CRYPTO_AesSessionKey),
4279 // GNUNET_PEER_resolve2 (t->peer->id), sizeof (struct GNUNET_PeerIdentity),
4280 // &my_full_id, sizeof (struct GNUNET_PeerIdentity),
4288 * Add a connection to a tunnel.
4291 * @param c Connection.
4294 tunnel_add_connection (struct MeshTunnel2 *t, struct MeshConnection *c)
4296 struct MeshConnection *aux;
4298 for (aux = t->connection_head; aux != NULL; aux = aux->next)
4301 GNUNET_CONTAINER_DLL_insert_tail (t->connection_head, t->connection_tail, c);
4306 * Initialize a Flow Control structure to the initial state.
4308 * @param fc Flow Control structure to initialize.
4311 fc_init (struct MeshFlowControl *fc)
4314 fc->last_pid_sent = (uint32_t) -1; /* Next (expected) = 0 */
4315 fc->last_pid_recv = (uint32_t) -1;
4316 fc->last_ack_sent = (uint32_t) 0;
4317 fc->last_ack_recv = (uint32_t) 0;
4318 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
4319 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
4321 fc->queue_max = (max_msgs_queue / max_connections) + 1;
4325 static struct MeshConnection *
4326 connection_new (const struct GNUNET_HashCode *cid)
4328 struct MeshConnection *c;
4330 c = GNUNET_new (struct MeshConnection);
4332 GNUNET_CONTAINER_multihashmap_put (connections, &c->id, c,
4333 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
4334 fc_init (&c->fwd_fc);
4335 fc_init (&c->bck_fc);
4344 * Find a connection.
4346 * @param cid Connection ID.
4348 static struct MeshConnection *
4349 connection_get (const struct GNUNET_HashCode *cid)
4351 return GNUNET_CONTAINER_multihashmap_get (connections, cid);
4356 connection_destroy (struct MeshConnection *c)
4358 struct MeshPeer *peer;
4363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying connection %s[%X]\n",
4364 peer2s (c->t->peer),
4367 /* Cancel all traffic */
4368 connection_cancel_queues (c, GNUNET_YES);
4369 connection_cancel_queues (c, GNUNET_NO);
4371 /* Cancel maintainance task (keepalive/timeout) */
4372 if (GNUNET_SCHEDULER_NO_TASK != c->fwd_maintenance_task)
4373 GNUNET_SCHEDULER_cancel (c->fwd_maintenance_task);
4374 if (GNUNET_SCHEDULER_NO_TASK != c->bck_maintenance_task)
4375 GNUNET_SCHEDULER_cancel (c->bck_maintenance_task);
4377 /* Deregister from neighbors */
4378 peer = connection_get_next_hop (c);
4379 if (NULL != peer && NULL != peer->connections)
4380 GNUNET_CONTAINER_multihashmap_remove (peer->connections, &c->id, c);
4381 peer = connection_get_prev_hop (c);
4382 if (NULL != peer && NULL != peer->connections)
4383 GNUNET_CONTAINER_multihashmap_remove (peer->connections, &c->id, c);
4386 GNUNET_STATISTICS_update (stats, "# connections", -1, GNUNET_NO);
4387 GNUNET_CONTAINER_DLL_remove (c->t->connection_head, c->t->connection_tail, c);
4393 tunnel_destroy (struct MeshTunnel2 *t)
4395 struct MeshConnection *c;
4396 struct MeshConnection *next;
4401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "destroying tunnel %s\n",
4404 // if (GNUNET_YES != GNUNET_CONTAINER_multihashmap_remove (tunnels, &t->id, t))
4405 // GNUNET_break (0);
4407 for (c = t->connection_head; NULL != c; c = next)
4410 connection_destroy (c);
4413 GNUNET_STATISTICS_update (stats, "# tunnels", -1, GNUNET_NO);
4420 * Tunnel is empty: destroy it.
4422 * Notifies all connections about the destruction.
4424 * @param t Tunnel to destroy.
4427 tunnel_destroy_empty (struct MeshTunnel2 *t)
4429 struct MeshConnection *c;
4431 for (c = t->connection_head; NULL != c; c = c->next)
4433 if (GNUNET_NO == c->destroy)
4434 connection_send_destroy (c);
4437 if (0 == t->pending_messages)
4440 t->destroy = GNUNET_YES;
4445 * Destroy tunnel if empty (no more channels).
4447 * @param t Tunnel to destroy if empty.
4450 tunnel_destroy_if_empty (struct MeshTunnel2 *t)
4452 if (NULL != t->channel_head)
4455 tunnel_destroy_empty (t);
4460 * Destroy a channel and free all resources.
4462 * @param ch Channel to destroy.
4465 channel_destroy (struct MeshChannel *ch)
4467 struct MeshClient *c;
4475 if (GNUNET_YES != GNUNET_CONTAINER_multihashmap32_remove (c->own_channels,
4486 GNUNET_CONTAINER_multihashmap32_remove (c->incoming_channels,
4493 channel_rel_free_all (ch->root_rel);
4494 channel_rel_free_all (ch->dest_rel);
4496 GNUNET_CONTAINER_DLL_remove (ch->t->channel_head, ch->t->channel_tail, ch);
4497 GNUNET_STATISTICS_update (stats, "# channels", -1, GNUNET_NO);
4503 * Create a new channel.
4505 * @param t Tunnel this channel is in.
4506 * @param owner Client that owns the channel, NULL for foreign channels.
4507 * @param lid_root Local ID for root client.
4509 * @return A new initialized channel. NULL on error.
4511 static struct MeshChannel *
4512 channel_new (struct MeshTunnel2 *t,
4513 struct MeshClient *owner, MESH_ChannelNumber lid_root)
4515 struct MeshChannel *ch;
4517 ch = GNUNET_new (struct MeshChannel);
4519 ch->lid_root = lid_root;
4522 GNUNET_CONTAINER_DLL_insert (t->channel_head, t->channel_tail, ch);
4524 GNUNET_STATISTICS_update (stats, "# channels", 1, GNUNET_NO);
4528 while (NULL != channel_get (t, t->next_chid))
4529 t->next_chid = (t->next_chid + 1) & ~GNUNET_MESH_LOCAL_CHANNEL_ID_CLI;
4530 ch->gid = t->next_chid;
4531 t->next_chid = (t->next_chid + 1) & ~GNUNET_MESH_LOCAL_CHANNEL_ID_CLI;
4534 GNUNET_CONTAINER_multihashmap32_put (owner->own_channels, lid_root, ch,
4535 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
4538 channel_destroy (ch);
4539 GNUNET_SERVER_receive_done (owner->handle, GNUNET_SYSERR);
4549 * Set options in a channel, extracted from a bit flag field
4551 * @param ch Channel to set options to.
4552 * @param options Bit array in host byte order.
4555 channel_set_options (struct MeshChannel *ch, uint32_t options)
4557 ch->nobuffer = (options & GNUNET_MESH_OPTION_NOBUFFER) != 0 ?
4558 GNUNET_YES : GNUNET_NO;
4559 ch->reliable = (options & GNUNET_MESH_OPTION_RELIABLE) != 0 ?
4560 GNUNET_YES : GNUNET_NO;
4565 * Iterator for deleting each channel whose client endpoint disconnected.
4567 * @param cls Closure (client that has disconnected).
4568 * @param key The local channel id (used to access the hashmap).
4569 * @param value The value stored at the key (channel to destroy).
4571 * @return GNUNET_OK, keep iterating.
4574 channel_destroy_iterator (void *cls,
4578 struct MeshChannel *ch = value;
4579 struct MeshClient *c = cls;
4580 struct MeshTunnel2 *t;
4582 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4583 " Channel %X (%X / %X) destroy, due to client %u shutdown.\n",
4584 ch->gid, ch->lid_root, ch->lid_dest, c->id);
4588 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is destination.\n", c->id);
4592 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Client %u is owner.\n", c->id);
4596 channel_send_destroy (ch);
4597 channel_destroy (ch);
4598 tunnel_destroy_if_empty (t);
4605 * Remove client's ports from the global hashmap on disconnect.
4607 * @param cls Closure (unused).
4609 * @param value Client structure.
4611 * @return GNUNET_OK, keep iterating.
4614 client_release_ports (void *cls,
4620 res = GNUNET_CONTAINER_multihashmap32_remove (ports, key, value);
4621 if (GNUNET_YES != res)
4624 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4625 "Port %u by client %p was not registered.\n",
4633 * Timeout function due to lack of keepalive/traffic from the owner.
4634 * Destroys connection if called.
4636 * @param cls Closure (connection to destroy).
4637 * @param tc TaskContext.
4640 connection_fwd_timeout (void *cls,
4641 const struct GNUNET_SCHEDULER_TaskContext *tc)
4643 struct MeshConnection *c = cls;
4645 c->fwd_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
4646 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4648 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4649 "Connection %s[%X] FWD timed out. Destroying.\n",
4650 peer2s (c->t->peer),
4653 if (connection_is_origin (c, GNUNET_YES)) /* If local, leave. */
4656 connection_destroy (c);
4661 * Timeout function due to lack of keepalive/traffic from the destination.
4662 * Destroys connection if called.
4664 * @param cls Closure (connection to destroy).
4665 * @param tc TaskContext
4668 connection_bck_timeout (void *cls,
4669 const struct GNUNET_SCHEDULER_TaskContext *tc)
4671 struct MeshConnection *c = cls;
4673 c->bck_maintenance_task = GNUNET_SCHEDULER_NO_TASK;
4674 if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
4677 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4678 "Connection %s[%X] FWD timed out. Destroying.\n",
4679 peer2s (c->t->peer),
4682 if (connection_is_origin (c, GNUNET_NO)) /* If local, leave. */
4685 connection_destroy (c);
4690 * Resets the connection timeout task, some other message has done the
4692 * - For the first peer on the direction this means to send
4693 * a keepalive or a path confirmation message (either create or ACK).
4694 * - For all other peers, this means to destroy the connection,
4695 * due to lack of activity.
4696 * Starts the tiemout if no timeout was running (connection just created).
4698 * @param c Connection whose timeout to reset.
4699 * @param fwd Is this forward?
4701 * TODO use heap to improve efficiency of scheduler.
4704 connection_reset_timeout (struct MeshConnection *c, int fwd)
4706 GNUNET_SCHEDULER_TaskIdentifier *ti;
4707 GNUNET_SCHEDULER_Task f;
4709 ti = fwd ? &c->fwd_maintenance_task : &c->bck_maintenance_task;
4711 if (GNUNET_SCHEDULER_NO_TASK != *ti)
4712 GNUNET_SCHEDULER_cancel (*ti);
4714 if (connection_is_origin (c, fwd)) /* Endpoint */
4716 f = fwd ? &connection_fwd_keepalive : &connection_bck_keepalive;
4717 *ti = GNUNET_SCHEDULER_add_delayed (refresh_connection_time, f, c);
4721 struct GNUNET_TIME_Relative delay;
4723 delay = GNUNET_TIME_relative_multiply (refresh_connection_time, 4);
4724 f = fwd ? &connection_fwd_timeout : &connection_bck_timeout;
4725 *ti = GNUNET_SCHEDULER_add_delayed (delay, f, c);
4731 * Iterator to notify all connections of a broken link. Mark connections
4732 * to destroy after all traffic has been sent.
4734 * @param cls Closure (peer disconnected).
4735 * @param key Current key code (tid).
4736 * @param value Value in the hash map (connection).
4738 * @return GNUNET_YES if we should continue to iterate,
4742 connection_broken (void *cls,
4743 const struct GNUNET_HashCode *key,
4746 struct MeshPeer *peer = cls;
4747 struct MeshConnection *c = value;
4748 struct GNUNET_MESH_ConnectionBroken msg;
4751 fwd = peer == connection_get_prev_hop (c);
4753 if (connection_is_terminal (c, fwd))
4755 /* Local shutdown: no point in iterating anymore */
4756 connection_destroy (c);
4759 connection_cancel_queues (c, !fwd);
4761 msg.header.size = htons (sizeof (struct GNUNET_MESH_ConnectionBroken));
4762 msg.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN);
4764 msg.peer1 = my_full_id;
4765 msg.peer2 = *GNUNET_PEER_resolve2 (peer->id);
4766 send_prebuilt_message_connection (&msg.header, c, NULL, fwd);
4767 c->destroy = GNUNET_YES;
4772 /******************************************************************************/
4773 /**************** MESH NETWORK HANDLER HELPERS ***********************/
4774 /******************************************************************************/
4777 * Free a transmission that was already queued with all resources
4778 * associated to the request.
4780 * @param queue Queue handler to cancel.
4781 * @param clear_cls Is it necessary to free associated cls?
4784 queue_destroy (struct MeshPeerQueue *queue, int clear_cls)
4786 struct MeshPeer *peer;
4787 struct MeshFlowControl *fc;
4792 GNUNET_assert (NULL != queue->c);
4793 fc = fwd ? &queue->c->fwd_fc : &queue->c->bck_fc;
4795 if (GNUNET_YES == clear_cls)
4797 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " queue destroy type %s\n",
4798 GNUNET_MESH_DEBUG_M2S (queue->type));
4799 switch (queue->type)
4801 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
4802 case GNUNET_MESSAGE_TYPE_MESH_TUNNEL_DESTROY:
4803 GNUNET_log (GNUNET_ERROR_TYPE_INFO, "destroying a DESTROY message\n");
4804 GNUNET_break (GNUNET_YES == queue->c->destroy);
4806 case GNUNET_MESSAGE_TYPE_MESH_FWD:
4807 case GNUNET_MESSAGE_TYPE_MESH_BCK:
4808 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4809 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4810 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
4811 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
4812 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
4813 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " prebuilt message\n");;
4814 GNUNET_free_non_null (queue->cls);
4819 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " type %s unknown!\n",
4820 GNUNET_MESH_DEBUG_M2S (queue->type));
4824 GNUNET_CONTAINER_DLL_remove (peer->queue_head, peer->queue_tail, queue);
4826 if (queue->type != GNUNET_MESSAGE_TYPE_MESH_ACK &&
4827 queue->type != GNUNET_MESSAGE_TYPE_MESH_POLL)
4829 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Q_N- %p %u, \n", fc, fc->queue_n);
4833 if (NULL != queue->c)
4835 queue->c->pending_messages--;
4836 if (NULL != queue->c->t)
4838 queue->c->t->pending_messages--;
4842 GNUNET_free (queue);
4847 queue_send (void *cls, size_t size, void *buf)
4849 struct MeshPeer *peer = cls;
4850 struct MeshFlowControl *fc;
4851 struct MeshConnection *c;
4852 struct GNUNET_MessageHeader *msg;
4853 struct MeshPeerQueue *queue;
4854 struct MeshTunnel2 *t;
4855 struct MeshChannel *ch;
4856 const struct GNUNET_PeerIdentity *dst_id;
4862 peer->core_transmit = NULL;
4863 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Queue send (max %u)\n", size);
4865 if (NULL == buf || 0 == size)
4867 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Buffer size 0.\n");
4872 queue = peer_get_first_message (peer);
4875 GNUNET_break (0); /* Core tmt_rdy should've been canceled */
4880 fc = fwd ? &c->fwd_fc : &c->bck_fc;
4883 dst_id = GNUNET_PEER_resolve2 (peer->id);
4884 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* towards %s\n", GNUNET_i2s (dst_id));
4885 /* Check if buffer size is enough for the message */
4886 if (queue->size > size)
4888 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* not enough room, reissue\n");
4889 peer->core_transmit =
4890 GNUNET_CORE_notify_transmit_ready (core_handle,
4893 GNUNET_TIME_UNIT_FOREVER_REL,
4900 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* size %u ok\n", queue->size);
4902 t = (NULL != c) ? c->t : NULL;
4906 switch (queue->type)
4908 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY:
4909 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN:
4910 case GNUNET_MESSAGE_TYPE_MESH_FWD:
4911 case GNUNET_MESSAGE_TYPE_MESH_BCK:
4912 case GNUNET_MESSAGE_TYPE_MESH_ACK:
4913 case GNUNET_MESSAGE_TYPE_MESH_POLL:
4914 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4916 GNUNET_MESH_DEBUG_M2S (queue->type));
4917 data_size = send_core_data_raw (queue->cls, size, buf);
4918 msg = (struct GNUNET_MessageHeader *) buf;
4919 type = ntohs (msg->type);
4921 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE:
4922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path create\n");
4923 if (connection_is_origin (c, GNUNET_YES))
4924 data_size = send_core_connection_create (queue->c, size, buf);
4926 data_size = send_core_data_raw (queue->cls, size, buf);
4928 case GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK:
4929 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* path ack\n");
4930 if (connection_is_origin (c, GNUNET_NO))
4931 data_size = send_core_connection_ack (queue->c, size, buf);
4933 data_size = send_core_data_raw (queue->cls, size, buf);
4935 case GNUNET_MESSAGE_TYPE_MESH_DATA:
4936 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
4937 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
4938 /* This should be encapsulted */
4943 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "* type unknown: %u\n",
4948 if (0 < drop_percent &&
4949 GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK, 101) < drop_percent)
4951 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
4952 "Dropping message of type %s\n",
4953 GNUNET_MESH_DEBUG_M2S (queue->type));
4957 /* Free queue, but cls was freed by send_core_* */
4959 queue_destroy (queue, GNUNET_NO);
4961 /* Send ACK if needed, after accounting for sent ID in fc->queue_n */
4964 case GNUNET_MESSAGE_TYPE_MESH_FWD:
4965 case GNUNET_MESSAGE_TYPE_MESH_BCK:
4966 pid = ntohl ( ((struct GNUNET_MESH_Encrypted *) buf)->pid );
4967 fc->last_pid_sent = pid;
4968 send_ack (c, ch, fwd);
4974 /* If more data in queue, send next */
4975 queue = peer_get_first_message (peer);
4978 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* more data!\n");
4979 if (NULL == peer->core_transmit) {
4980 peer->core_transmit =
4981 GNUNET_CORE_notify_transmit_ready(core_handle,
4984 GNUNET_TIME_UNIT_FOREVER_REL,
4992 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
4993 "* tmt rdy called somewhere else\n");
4995 if (GNUNET_SCHEDULER_NO_TASK == fc->poll_task)
4997 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* starting poll timeout\n");
4999 GNUNET_SCHEDULER_add_delayed (fc->poll_time, &connection_poll, fc);
5004 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task)
5006 GNUNET_SCHEDULER_cancel (fc->poll_task);
5007 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
5012 c->pending_messages--;
5013 if (GNUNET_YES == c->destroy && 0 == c->pending_messages)
5015 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying connection!\n");
5016 connection_destroy (c);
5022 t->pending_messages--;
5023 if (GNUNET_YES == t->destroy && 0 == t->pending_messages)
5025 // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* destroying tunnel!\n");
5029 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "* Return %d\n", data_size);
5035 queue_add (void *cls, uint16_t type, size_t size,
5036 struct MeshConnection *c,
5037 struct MeshChannel *ch,
5040 struct MeshPeerQueue *queue;
5041 struct MeshFlowControl *fc;
5042 struct MeshPeer *peer;
5045 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5046 "queue add %s %s (%u) on c %p, ch %p\n",
5047 fwd ? "FWD" : "BCK", GNUNET_MESH_DEBUG_M2S (type), size, c, ch);
5048 GNUNET_assert (NULL != c);
5050 fc = fwd ? &c->fwd_fc : &c->bck_fc;
5051 peer = fwd ? connection_get_next_hop (c) : connection_get_prev_hop (c);
5061 if (GNUNET_MESSAGE_TYPE_MESH_POLL == type ||
5062 GNUNET_MESSAGE_TYPE_MESH_ACK == type)
5067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "priority %d\n", priority);
5068 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "fc %p\n", fc);
5069 if (fc->queue_n >= fc->queue_max && 0 == priority)
5071 GNUNET_STATISTICS_update (stats, "# messages dropped (buffer full)",
5074 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5075 "queue full: %u/%u\n",
5076 fc->queue_n, fc->queue_max);
5077 return; /* Drop this message */
5080 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "last pid %u\n", fc->last_pid_sent);
5081 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ack %u\n", fc->last_ack_recv);
5082 if (GMC_is_pid_bigger (fc->last_pid_sent + 1, fc->last_ack_recv) &&
5083 GNUNET_SCHEDULER_NO_TASK == fc->poll_task &&
5084 GNUNET_MESSAGE_TYPE_MESH_POLL != type)
5086 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5087 "no buffer space (%u > %u): starting poll\n",
5088 fc->last_pid_sent + 1, fc->last_ack_recv);
5089 fc->poll_task = GNUNET_SCHEDULER_add_delayed (fc->poll_time,
5093 queue = GNUNET_malloc (sizeof (struct MeshPeerQueue));
5101 if (100 <= priority)
5103 GNUNET_CONTAINER_DLL_insert (peer->queue_head, peer->queue_tail, queue);
5107 GNUNET_CONTAINER_DLL_insert_tail (peer->queue_head, peer->queue_tail, queue);
5108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Q_N+ %p %u, \n", fc, fc->queue_n);
5113 if (NULL == peer->core_transmit)
5115 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5116 "calling core tmt rdy towards %s for %u bytes\n",
5117 peer2s (peer), size);
5118 peer->core_transmit =
5119 GNUNET_CORE_notify_transmit_ready (core_handle,
5122 GNUNET_TIME_UNIT_FOREVER_REL,
5123 GNUNET_PEER_resolve2 (peer->id),
5130 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5131 "core tmt rdy towards %s already called\n",
5135 c->pending_messages++;
5137 c->t->pending_messages++;
5141 /******************************************************************************/
5142 /******************** MESH NETWORK HANDLERS **************************/
5143 /******************************************************************************/
5147 * Generic handler for mesh network payload traffic.
5149 * @param t Tunnel on which we got this message.
5150 * @param message Unencryted data message.
5151 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
5154 handle_data (struct MeshTunnel2 *t, const struct GNUNET_MESH_Data *msg, int fwd)
5156 struct MeshChannelReliability *rel;
5157 struct MeshChannel *ch;
5158 struct MeshClient *c;
5164 size = ntohs (msg->header.size);
5166 sizeof (struct GNUNET_MESH_Data) +
5167 sizeof (struct GNUNET_MessageHeader))
5172 type = ntohs (msg->header.type);
5173 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message\n",
5174 GNUNET_MESH_DEBUG_M2S (type));
5175 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " payload of type %s\n",
5176 GNUNET_MESH_DEBUG_M2S (ntohs (msg[1].header.type)));
5179 ch = channel_get (t, ntohl (msg->chid));
5182 GNUNET_STATISTICS_update (stats, "# data on unknown channel", 1, GNUNET_NO);
5183 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "WARNING channel unknown\n");
5187 /* Initialize FWD/BCK data */
5188 c = fwd ? ch->dest : ch->root;
5189 rel = fwd ? ch->dest_rel : ch->root_rel;
5197 tunnel_change_state (t, MESH_TUNNEL_READY);
5199 GNUNET_STATISTICS_update (stats, "# data received", 1, GNUNET_NO);
5201 mid = ntohl (msg->mid);
5202 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " mid %u\n", mid);
5204 if (GNUNET_NO == ch->reliable ||
5205 ( !GMC_is_pid_bigger (rel->mid_recv, mid) &&
5206 GMC_is_pid_bigger (rel->mid_recv + 64, mid) ) )
5208 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! RECV %u\n", mid);
5209 if (GNUNET_YES == ch->reliable)
5211 /* Is this the exact next expected messasge? */
5212 if (mid == rel->mid_recv)
5214 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "as expected\n");
5216 channel_send_client_data (ch, msg, fwd);
5220 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "save for later\n");
5221 channel_rel_add_buffered_data (msg, rel);
5226 /* Tunnel is unreliable: send to clients directly */
5227 /* FIXME: accept Out Of Order traffic */
5228 rel->mid_recv = mid + 1;
5229 channel_send_client_data (ch, msg, fwd);
5234 GNUNET_break_op (0);
5235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5236 " MID %u not expected (%u - %u), dropping!\n",
5237 mid, rel->mid_recv, rel->mid_recv + 64);
5240 channel_send_data_ack (ch, fwd);
5244 * Handler for mesh network traffic end-to-end ACKs.
5246 * @param t Tunnel on which we got this message.
5247 * @param message Data message.
5248 * @param fwd Is this a fwd ACK? (dest->orig)
5251 handle_data_ack (struct MeshTunnel2 *t,
5252 const struct GNUNET_MESH_DataACK *msg, int fwd)
5254 struct MeshChannelReliability *rel;
5255 struct MeshReliableMessage *copy;
5256 struct MeshReliableMessage *next;
5257 struct MeshChannel *ch;
5262 type = ntohs (msg->header.type);
5263 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a %s message!\n",
5264 GNUNET_MESH_DEBUG_M2S (type));
5265 ch = channel_get (t, ntohl (msg->chid));
5268 GNUNET_STATISTICS_update (stats, "# ack on unknown channel", 1, GNUNET_NO);
5271 ack = ntohl (msg->mid);
5272 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! %s ACK %u\n",
5273 (GNUNET_YES == fwd) ? "FWD" : "BCK", ack);
5275 if (GNUNET_YES == fwd)
5289 for (work = GNUNET_NO, copy = rel->head_sent; copy != NULL; copy = next)
5291 if (GMC_is_pid_bigger (copy->mid, ack))
5293 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! head %u, out!\n", copy->mid);
5294 channel_rel_free_sent (rel, msg);
5298 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! id %u\n", copy->mid);
5300 rel_message_free (copy);
5302 /* ACK client if needed */
5303 // channel_send_ack (t, type, GNUNET_MESSAGE_TYPE_MESH_UNICAST_ACK == type);
5305 /* If some message was free'd, update the retransmission delay*/
5306 if (GNUNET_YES == work)
5308 if (GNUNET_SCHEDULER_NO_TASK != rel->retry_task)
5310 GNUNET_SCHEDULER_cancel (rel->retry_task);
5311 if (NULL == rel->head_sent)
5313 rel->retry_task = GNUNET_SCHEDULER_NO_TASK;
5317 struct GNUNET_TIME_Absolute new_target;
5318 struct GNUNET_TIME_Relative delay;
5320 delay = GNUNET_TIME_relative_multiply (rel->retry_timer,
5321 MESH_RETRANSMIT_MARGIN);
5322 new_target = GNUNET_TIME_absolute_add (rel->head_sent->timestamp,
5324 delay = GNUNET_TIME_absolute_get_remaining (new_target);
5326 GNUNET_SCHEDULER_add_delayed (delay,
5327 &channel_retransmit_message,
5338 * Core handler for connection creation.
5340 * @param cls Closure (unused).
5341 * @param peer Sender (neighbor).
5342 * @param message Message.
5344 * @return GNUNET_OK to keep the connection open,
5345 * GNUNET_SYSERR to close it (signal serious error)
5348 handle_mesh_connection_create (void *cls,
5349 const struct GNUNET_PeerIdentity *peer,
5350 const struct GNUNET_MessageHeader *message)
5352 struct GNUNET_MESH_ConnectionCreate *msg;
5353 struct GNUNET_PeerIdentity *id;
5354 struct GNUNET_HashCode *cid;
5355 struct MeshPeerPath *path;
5356 struct MeshPeer *dest_peer;
5357 struct MeshPeer *orig_peer;
5358 struct MeshConnection *c;
5359 unsigned int own_pos;
5363 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
5364 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a connection create msg\n");
5367 size = ntohs (message->size);
5368 if (size < sizeof (struct GNUNET_MESH_ConnectionCreate))
5370 GNUNET_break_op (0);
5374 /* Calculate hops */
5375 size -= sizeof (struct GNUNET_MESH_ConnectionCreate);
5376 if (size % sizeof (struct GNUNET_PeerIdentity))
5378 GNUNET_break_op (0);
5381 size /= sizeof (struct GNUNET_PeerIdentity);
5384 GNUNET_break_op (0);
5387 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " path has %u hops.\n", size);
5389 /* Get parameters */
5390 msg = (struct GNUNET_MESH_ConnectionCreate *) message;
5392 id = (struct GNUNET_PeerIdentity *) &msg[1];
5393 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5394 " connection %s (%s).\n",
5395 GNUNET_h2s (cid), GNUNET_i2s (id));
5397 /* Create connection */
5398 c = connection_get (cid);
5401 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating connection\n");
5402 c = connection_new (cid);
5404 return GNUNET_OK; connection_reset_timeout (c, GNUNET_YES);
5405 tunnel_change_state (c->t, MESH_TUNNEL_WAITING);
5408 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Creating path...\n");
5409 path = path_new (size);
5411 for (i = 0; i < size; i++)
5413 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... adding %s\n",
5414 GNUNET_i2s (&id[i]));
5415 path->peers[i] = GNUNET_PEER_intern (&id[i]);
5416 if (path->peers[i] == myid)
5419 if (own_pos == 0 && path->peers[own_pos] != myid)
5421 /* create path: self not found in path through self */
5422 GNUNET_break_op (0);
5423 path_destroy (path);
5424 connection_destroy (c);
5427 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Own position: %u\n", own_pos);
5428 path_add_to_peers (path, GNUNET_NO);
5429 c->path = path_duplicate (path);
5430 c->own_pos = own_pos;
5437 /* Remember peers */
5438 dest_peer = peer_get (&id[size - 1]);
5439 orig_peer = peer_get (&id[0]);
5441 /* Is it a connection to us? */
5442 if (c->own_pos == size - 1)
5444 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " It's for us!\n");
5445 peer_add_path_to_origin (orig_peer, path, GNUNET_YES);
5447 if (NULL == orig_peer->tunnel)
5449 orig_peer->tunnel = tunnel_new ();
5450 orig_peer->tunnel->peer = orig_peer;
5452 tunnel_add_connection (orig_peer->tunnel, c);
5454 send_connection_ack (c, GNUNET_NO);
5456 /* Keep tunnel alive in direction dest->owner*/
5457 connection_reset_timeout (c, GNUNET_NO);
5461 /* It's for somebody else! Retransmit. */
5462 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Retransmitting.\n");
5463 peer_add_path (dest_peer, path_duplicate (path), GNUNET_NO);
5464 peer_add_path_to_origin (orig_peer, path, GNUNET_NO);
5465 send_prebuilt_message_connection (message, c, NULL, GNUNET_YES);
5472 * Core handler for path ACKs
5474 * @param cls closure
5475 * @param message message
5476 * @param peer peer identity this notification is about
5478 * @return GNUNET_OK to keep the connection open,
5479 * GNUNET_SYSERR to close it (signal serious error)
5482 handle_mesh_connection_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5483 const struct GNUNET_MessageHeader *message)
5485 struct GNUNET_MESH_ConnectionACK *msg;
5486 struct MeshPeerPath *p;
5487 struct MeshConnection *c;
5489 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
5490 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received a connection ACK msg\n");
5491 msg = (struct GNUNET_MESH_ConnectionACK *) message;
5492 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on connection %s\n",
5493 GNUNET_h2s (&msg->cid));
5494 c = connection_get (&msg->cid);
5497 GNUNET_STATISTICS_update (stats, "# control on unknown connection",
5499 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " don't know the connection!\n");
5503 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " via peer %s\n",
5506 /* Add path to peers? */
5510 path_add_to_peers (p, GNUNET_YES);
5516 connection_change_state (c, MESH_CONNECTION_READY);
5517 connection_reset_timeout (c, GNUNET_NO);
5519 /* Message for us? */
5520 if (connection_is_terminal (c, GNUNET_NO))
5522 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Connection ACK for us!\n");
5523 if (MESH_TUNNEL_READY != c->t->state)
5524 tunnel_change_state (c->t, MESH_TUNNEL_READY);
5525 tunnel_send_queued_data (c->t, GNUNET_YES);
5526 if (3 <= tunnel_count_connections (c->t) && NULL != c->t->peer->dhtget)
5528 GNUNET_DHT_get_stop (c->t->peer->dhtget);
5529 c->t->peer->dhtget = NULL;
5531 //connection_send_ack (c, GNUNET_NO); /* FIXME */
5535 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
5536 send_prebuilt_message_connection (message, c, NULL, GNUNET_NO);
5542 * Core handler for notifications of broken paths
5544 * @param cls Closure (unused).
5545 * @param peer Peer identity of sending neighbor.
5546 * @param message Message.
5548 * @return GNUNET_OK to keep the connection open,
5549 * GNUNET_SYSERR to close it (signal serious error)
5552 handle_mesh_connection_broken (void *cls, const struct GNUNET_PeerIdentity *peer,
5553 const struct GNUNET_MessageHeader *message)
5555 struct GNUNET_MESH_ConnectionBroken *msg;
5556 struct MeshConnection *c;
5558 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5559 "Received a CONNECTION BROKEN msg from %s\n", GNUNET_i2s (peer));
5560 msg = (struct GNUNET_MESH_ConnectionBroken *) message;
5561 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5562 GNUNET_i2s (&msg->peer1));
5563 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " regarding %s\n",
5564 GNUNET_i2s (&msg->peer2));
5565 c = connection_get (&msg->cid);
5568 GNUNET_break_op (0);
5571 tunnel_notify_connection_broken (c->t, GNUNET_PEER_search (&msg->peer1),
5572 GNUNET_PEER_search (&msg->peer2));
5579 * Core handler for tunnel destruction
5581 * @param cls Closure (unused).
5582 * @param peer Peer identity of sending neighbor.
5583 * @param message Message.
5585 * @return GNUNET_OK to keep the connection open,
5586 * GNUNET_SYSERR to close it (signal serious error)
5589 handle_mesh_connection_destroy (void *cls,
5590 const struct GNUNET_PeerIdentity *peer,
5591 const struct GNUNET_MessageHeader *message)
5593 struct GNUNET_MESH_ConnectionDestroy *msg;
5594 struct MeshConnection *c;
5598 msg = (struct GNUNET_MESH_ConnectionDestroy *) message;
5599 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5600 "Got a CONNECTION DESTROY message from %s\n",
5602 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5603 " for connection %s\n",
5604 GNUNET_h2s (&msg->cid));
5605 c = connection_get (&msg->cid);
5608 /* Probably already got the message from another path,
5609 * destroyed the tunnel and retransmitted to children.
5612 GNUNET_STATISTICS_update (stats, "# control on unknown tunnel",
5616 id = GNUNET_PEER_search (peer);
5617 if (id == connection_get_prev_hop (c)->id)
5619 else if (id == connection_get_next_hop (c)->id)
5623 GNUNET_break_op (0);
5626 send_prebuilt_message_connection (message, c, NULL, fwd);
5627 c->destroy = GNUNET_YES;
5634 * Handler for channel create messages.
5636 * @param t Tunnel this channel is to be created in.
5637 * @param msg Message.
5638 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
5641 handle_channel_create (struct MeshTunnel2 *t,
5642 struct GNUNET_MESH_ChannelCreate *msg,
5645 MESH_ChannelNumber chid;
5646 struct MeshChannel *ch;
5647 struct MeshClient *c;
5650 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received Channel Create\n");
5651 /* Check message size */
5652 if (ntohs (msg->header.size) != sizeof (struct GNUNET_MESH_ChannelCreate))
5654 GNUNET_break_op (0);
5658 /* Check if channel exists */
5659 chid = ntohl (msg->chid);
5660 ch = channel_get (t, chid);
5663 /* Probably a retransmission, safe to ignore */
5664 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " already exists...\n");
5665 if (NULL != ch->dest)
5667 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " duplicate CC!!\n");
5668 channel_send_ack (ch, !fwd);
5674 /* Create channel */
5675 ch = channel_new (t, NULL, 0);
5676 channel_set_options (ch, ntohl (msg->opt));
5679 /* Find a destination client */
5680 port = ntohl (msg->port);
5681 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port %u\n", port);
5682 c = GNUNET_CONTAINER_multihashmap32_get (ports, port);
5685 /* TODO send reject */
5686 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " no client has port registered\n");
5691 channel_add_client (ch, c);
5692 if (GNUNET_YES == ch->reliable)
5693 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "!!! Reliable\n");
5695 send_local_channel_create (ch);
5696 channel_send_ack (ch, !fwd);
5697 send_local_ack (ch, !fwd);
5702 * Handler for channel ack messages.
5704 * @param t Tunnel this channel is to be created in.
5705 * @param msg Message.
5706 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
5709 handle_channel_ack (struct MeshTunnel2 *t,
5710 struct GNUNET_MESH_ChannelManage *msg,
5713 MESH_ChannelNumber chid;
5714 struct MeshChannel *ch;
5716 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received Channel ACK\n");
5717 /* Check message size */
5718 if (ntohs (msg->header.size) != sizeof (struct GNUNET_MESH_ChannelManage))
5720 GNUNET_break_op (0);
5724 /* Check if channel exists */
5725 chid = ntohl (msg->chid);
5726 ch = channel_get (t, chid);
5729 GNUNET_break_op (0);
5730 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " channel %u unknown!!\n", chid);
5734 channel_confirm (ch, !fwd);
5739 * Handler for channel destroy messages.
5741 * @param t Tunnel this channel is to be destroyed of.
5742 * @param msg Message.
5743 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
5746 handle_channel_destroy (struct MeshTunnel2 *t,
5747 struct GNUNET_MESH_ChannelManage *msg,
5750 MESH_ChannelNumber chid;
5751 struct MeshChannel *ch;
5753 /* Check message size */
5754 if (ntohs (msg->header.size) != sizeof (struct GNUNET_MESH_ChannelManage))
5756 GNUNET_break_op (0);
5760 /* Check if channel exists */
5761 chid = ntohl (msg->chid);
5762 ch = channel_get (t, chid);
5765 /* Probably a retransmission, safe to ignore */
5769 send_local_channel_destroy (ch, fwd);
5770 channel_destroy (ch);
5775 handle_decrypted (struct MeshTunnel2 *t,
5776 const struct GNUNET_MessageHeader *msgh,
5779 switch (ntohs (msgh->type))
5781 case GNUNET_MESSAGE_TYPE_MESH_DATA:
5782 /* Don't send hop ACK, wait for client to ACK */
5783 handle_data (t, (struct GNUNET_MESH_Data *) msgh, fwd);
5786 case GNUNET_MESSAGE_TYPE_MESH_DATA_ACK:
5787 handle_data_ack (t, (struct GNUNET_MESH_DataACK *) msgh, fwd);
5790 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE:
5791 handle_channel_create (t,
5792 (struct GNUNET_MESH_ChannelCreate *) msgh,
5796 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_ACK:
5797 handle_channel_ack (t,
5798 (struct GNUNET_MESH_ChannelManage *) msgh,
5802 case GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY:
5803 handle_channel_destroy (t,
5804 (struct GNUNET_MESH_ChannelManage *) msgh,
5809 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5810 "end-to-end message not known (%u)\n",
5811 ntohs (msgh->type));
5817 * Generic handler for mesh network encrypted traffic.
5819 * @param peer Peer identity this notification is about.
5820 * @param message Encrypted message.
5821 * @param fwd Is this FWD traffic? GNUNET_YES : GNUNET_NO;
5823 * @return GNUNET_OK to keep the connection open,
5824 * GNUNET_SYSERR to close it (signal serious error)
5827 handle_mesh_encrypted (const struct GNUNET_PeerIdentity *peer,
5828 const struct GNUNET_MESH_Encrypted *msg,
5831 struct MeshConnection *c;
5832 struct MeshTunnel2 *t;
5833 struct MeshPeer *neighbor;
5834 struct MeshFlowControl *fc;
5841 size = ntohs (msg->header.size);
5843 sizeof (struct GNUNET_MESH_Encrypted) +
5844 sizeof (struct GNUNET_MessageHeader))
5846 GNUNET_break_op (0);
5849 type = ntohs (msg->header.type);
5850 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
5851 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a %s message from %s\n",
5852 GNUNET_MESH_DEBUG_M2S (type), GNUNET_i2s (peer));
5854 /* Check connection */
5855 c = connection_get (&msg->cid);
5858 GNUNET_STATISTICS_update (stats, "# unknown connection", 1, GNUNET_NO);
5859 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "WARNING connection unknown\n");
5863 fc = fwd ? &c->fwd_fc : &c->bck_fc;
5865 /* Check if origin is as expected */
5866 neighbor = connection_get_hop (c, !fwd);
5867 if (peer_get (peer)->id != neighbor->id)
5869 GNUNET_break_op (0);
5874 pid = ntohl (msg->pid);
5875 if (GMC_is_pid_bigger (pid, fc->last_ack_sent))
5877 GNUNET_STATISTICS_update (stats, "# unsolicited message", 1, GNUNET_NO);
5878 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5879 "WARNING Received PID %u, (prev %u), ACK %u\n",
5880 pid, fc->last_pid_recv, fc->last_ack_sent);
5883 if (GNUNET_NO == GMC_is_pid_bigger (pid, fc->last_pid_recv))
5885 GNUNET_STATISTICS_update (stats, "# duplicate PID", 1, GNUNET_NO);
5886 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
5887 " Pid %u not expected (%u+), dropping!\n",
5888 pid, fc->last_pid_recv + 1);
5891 if (MESH_CONNECTION_SENT == c->state)
5892 connection_change_state (c, MESH_CONNECTION_READY);
5893 connection_reset_timeout (c, fwd);
5894 fc->last_pid_recv = pid;
5896 /* Is this message for us? */
5897 if (connection_is_terminal (c, fwd))
5899 size_t dsize = size - sizeof (struct GNUNET_MESH_Encrypted);
5901 struct GNUNET_MessageHeader *msgh;
5904 /* TODO signature verification */
5905 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " message for us!\n");
5906 GNUNET_STATISTICS_update (stats, "# messages received", 1, GNUNET_NO);
5908 fc->last_pid_recv = pid;
5909 tunnel_decrypt (t, cbuf, &msg[1], dsize, msg->iv, fwd);
5913 msgh = (struct GNUNET_MessageHeader *) &cbuf[off];
5914 handle_decrypted (t, msgh, fwd);
5915 off += ntohs (msgh->size);
5917 send_ack (c, NULL, fwd);
5921 /* Message not for us: forward to next hop */
5922 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " not for us, retransmitting...\n");
5923 ttl = ntohl (msg->ttl);
5924 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ttl: %u\n", ttl);
5927 GNUNET_STATISTICS_update (stats, "# TTL drops", 1, GNUNET_NO);
5928 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " TTL is 0, DROPPING!\n");
5929 send_ack (c, NULL, fwd);
5932 GNUNET_STATISTICS_update (stats, "# messages forwarded", 1, GNUNET_NO);
5934 send_prebuilt_message_connection (&msg->header, c, NULL, fwd);
5941 * Core handler for mesh network traffic going orig->dest.
5943 * @param cls Closure (unused).
5944 * @param message Message received.
5945 * @param peer Peer who sent the message.
5947 * @return GNUNET_OK to keep the connection open,
5948 * GNUNET_SYSERR to close it (signal serious error)
5951 handle_mesh_fwd (void *cls, const struct GNUNET_PeerIdentity *peer,
5952 const struct GNUNET_MessageHeader *message)
5954 return handle_mesh_encrypted (peer,
5955 (struct GNUNET_MESH_Encrypted *)message,
5960 * Core handler for mesh network traffic going dest->orig.
5962 * @param cls Closure (unused).
5963 * @param message Message received.
5964 * @param peer Peer who sent the message.
5966 * @return GNUNET_OK to keep the connection open,
5967 * GNUNET_SYSERR to close it (signal serious error)
5970 handle_mesh_bck (void *cls, const struct GNUNET_PeerIdentity *peer,
5971 const struct GNUNET_MessageHeader *message)
5973 return handle_mesh_encrypted (peer,
5974 (struct GNUNET_MESH_Encrypted *)message,
5980 * Core handler for mesh network traffic point-to-point acks.
5982 * @param cls closure
5983 * @param message message
5984 * @param peer peer identity this notification is about
5986 * @return GNUNET_OK to keep the connection open,
5987 * GNUNET_SYSERR to close it (signal serious error)
5990 handle_mesh_ack (void *cls, const struct GNUNET_PeerIdentity *peer,
5991 const struct GNUNET_MessageHeader *message)
5993 struct GNUNET_MESH_ACK *msg;
5994 struct MeshConnection *c;
5995 struct MeshFlowControl *fc;
5999 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
6000 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got an ACK packet from %s!\n",
6002 msg = (struct GNUNET_MESH_ACK *) message;
6004 c = connection_get (&msg->cid);
6008 GNUNET_STATISTICS_update (stats, "# ack on unknown connection", 1,
6013 /* Is this a forward or backward ACK? */
6014 id = GNUNET_PEER_search (peer);
6015 if (connection_get_next_hop (c)->id == id)
6017 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
6020 else if (connection_get_prev_hop (c)->id == id)
6022 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
6027 GNUNET_break_op (0);
6031 ack = ntohl (msg->ack);
6032 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ACK %u\n", ack);
6034 /* Cancel polling if the ACK is bigger than before. */
6035 if (GNUNET_SCHEDULER_NO_TASK != fc->poll_task &&
6036 GMC_is_pid_bigger (ack, fc->last_ack_recv))
6038 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " Cancel poll\n");
6039 GNUNET_SCHEDULER_cancel (fc->poll_task);
6040 fc->poll_task = GNUNET_SCHEDULER_NO_TASK;
6041 fc->poll_time = GNUNET_TIME_UNIT_SECONDS;
6044 fc->last_ack_recv = ack;
6045 connection_unlock_queue (c, fc == &c->fwd_fc);
6052 * Core handler for mesh network traffic point-to-point ack polls.
6054 * @param cls closure
6055 * @param message message
6056 * @param peer peer identity this notification is about
6058 * @return GNUNET_OK to keep the connection open,
6059 * GNUNET_SYSERR to close it (signal serious error)
6062 handle_mesh_poll (void *cls, const struct GNUNET_PeerIdentity *peer,
6063 const struct GNUNET_MessageHeader *message)
6065 struct GNUNET_MESH_Poll *msg;
6066 struct MeshConnection *c;
6067 struct MeshFlowControl *fc;
6072 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "\n\n");
6073 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a POLL packet from %s!\n",
6076 msg = (struct GNUNET_MESH_Poll *) message;
6078 c = connection_get (&msg->cid);
6082 GNUNET_STATISTICS_update (stats, "# poll on unknown connection", 1,
6084 GNUNET_break_op (0);
6088 /* Is this a forward or backward ACK?
6089 * Note: a poll should never be needed in a loopback case,
6090 * since there is no possiblility of packet loss there, so
6091 * this way of discerining FWD/BCK should not be a problem.
6093 id = GNUNET_PEER_search (peer);
6094 if (connection_get_next_hop (c)->id == id)
6096 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " FWD ACK\n");
6099 else if (connection_get_prev_hop (c)->id == id)
6101 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " BCK ACK\n");
6106 GNUNET_break_op (0);
6110 pid = ntohl (msg->pid);
6111 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " PID %u, OLD %u\n",
6112 pid, fc->last_pid_recv);
6113 fc->last_pid_recv = pid;
6114 fwd = fc == &c->fwd_fc;
6115 send_ack (c, NULL, fwd);
6122 * Core handler for mesh keepalives.
6124 * @param cls closure
6125 * @param message message
6126 * @param peer peer identity this notification is about
6127 * @return GNUNET_OK to keep the connection open,
6128 * GNUNET_SYSERR to close it (signal serious error)
6130 * TODO: Check who we got this from, to validate route.
6133 handle_mesh_keepalive (void *cls, const struct GNUNET_PeerIdentity *peer,
6134 const struct GNUNET_MessageHeader *message)
6136 struct GNUNET_MESH_ConnectionKeepAlive *msg;
6137 struct MeshConnection *c;
6138 struct MeshPeer *neighbor;
6141 msg = (struct GNUNET_MESH_ConnectionKeepAlive *) message;
6142 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "got a keepalive packet from %s\n",
6145 c = connection_get (&msg->cid);
6148 GNUNET_STATISTICS_update (stats, "# keepalive on unknown connection", 1,
6153 fwd = GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE == ntohs (message->type) ?
6154 GNUNET_YES : GNUNET_NO;
6156 /* Check if origin is as expected */
6157 neighbor = connection_get_hop (c, fwd);
6158 if (peer_get (peer)->id != neighbor->id)
6160 GNUNET_break_op (0);
6164 connection_change_state (c, MESH_CONNECTION_READY);
6165 connection_reset_timeout (c, fwd);
6167 if (connection_is_terminal (c, fwd))
6170 GNUNET_STATISTICS_update (stats, "# keepalives forwarded", 1, GNUNET_NO);
6171 send_prebuilt_message_connection (message, c, NULL, fwd);
6179 * Functions to handle messages from core
6181 static struct GNUNET_CORE_MessageHandler core_handlers[] = {
6182 {&handle_mesh_connection_create, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_CREATE,
6184 {&handle_mesh_connection_ack, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_ACK,
6185 sizeof (struct GNUNET_MESH_ConnectionACK)},
6186 {&handle_mesh_connection_broken, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_BROKEN,
6187 sizeof (struct GNUNET_MESH_ConnectionBroken)},
6188 {&handle_mesh_connection_destroy, GNUNET_MESSAGE_TYPE_MESH_CONNECTION_DESTROY,
6189 sizeof (struct GNUNET_MESH_ConnectionDestroy)},
6190 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_FWD_KEEPALIVE,
6191 sizeof (struct GNUNET_MESH_ConnectionKeepAlive)},
6192 {&handle_mesh_keepalive, GNUNET_MESSAGE_TYPE_MESH_BCK_KEEPALIVE,
6193 sizeof (struct GNUNET_MESH_ConnectionKeepAlive)},
6194 {&handle_mesh_ack, GNUNET_MESSAGE_TYPE_MESH_ACK,
6195 sizeof (struct GNUNET_MESH_ACK)},
6196 {&handle_mesh_poll, GNUNET_MESSAGE_TYPE_MESH_POLL,
6197 sizeof (struct GNUNET_MESH_Poll)},
6198 {&handle_mesh_fwd, GNUNET_MESSAGE_TYPE_MESH_FWD, 0},
6199 {&handle_mesh_bck, GNUNET_MESSAGE_TYPE_MESH_BCK, 0},
6205 * Function to process paths received for a new peer addition. The recorded
6206 * paths form the initial tunnel, which can be optimized later.
6207 * Called on each result obtained for the DHT search.
6209 * @param cls closure
6210 * @param exp when will this value expire
6211 * @param key key of the result
6212 * @param get_path path of the get request
6213 * @param get_path_length lenght of get_path
6214 * @param put_path path of the put request
6215 * @param put_path_length length of the put_path
6216 * @param type type of the result
6217 * @param size number of bytes in data
6218 * @param data pointer to the result data
6221 dht_get_id_handler (void *cls, struct GNUNET_TIME_Absolute exp,
6222 const struct GNUNET_HashCode * key,
6223 const struct GNUNET_PeerIdentity *get_path,
6224 unsigned int get_path_length,
6225 const struct GNUNET_PeerIdentity *put_path,
6226 unsigned int put_path_length, enum GNUNET_BLOCK_Type type,
6227 size_t size, const void *data)
6229 struct MeshPeer *peer = cls;
6230 struct MeshPeerPath *p;
6231 struct MeshConnection *c;
6232 struct GNUNET_PeerIdentity pi;
6235 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got results from DHT!\n");
6236 GNUNET_PEER_resolve (peer->id, &pi);
6237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " for %s\n", GNUNET_i2s (&pi));
6239 p = path_build_from_dht (get_path, get_path_length,
6240 put_path, put_path_length);
6241 path_add_to_peers (p, GNUNET_NO);
6244 /* Count connections */
6245 for (c = peer->tunnel->connection_head, i = 0; NULL != c; c = c->next, i++);
6247 /* If we already have 3 (or more (?!)) connections, it's enough */
6251 if (peer->tunnel->state == MESH_TUNNEL_SEARCHING)
6253 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " ... connect!\n");
6254 peer_connect (peer);
6260 /******************************************************************************/
6261 /********************* MESH LOCAL HANDLES **************************/
6262 /******************************************************************************/
6266 * Handler for client connection.
6268 * @param cls Closure (unused).
6269 * @param client Client handler.
6272 handle_local_client_connect (void *cls, struct GNUNET_SERVER_Client *client)
6274 struct MeshClient *c;
6278 c = GNUNET_malloc (sizeof (struct MeshClient));
6280 c->id = next_client_id++; /* overflow not important: just for debug */
6281 GNUNET_SERVER_client_keep (client);
6282 GNUNET_SERVER_client_set_user_context (client, c);
6283 GNUNET_CONTAINER_DLL_insert (clients_head, clients_tail, c);
6288 * Handler for client disconnection
6290 * @param cls closure
6291 * @param client identification of the client; NULL
6292 * for the last call when the server is destroyed
6295 handle_local_client_disconnect (void *cls, struct GNUNET_SERVER_Client *client)
6297 struct MeshClient *c;
6299 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "client disconnected: %p\n", client);
6302 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " (SERVER DOWN)\n");
6306 c = client_get (client);
6309 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "matching client found (%u, %p)\n",
6311 GNUNET_SERVER_client_drop (c->handle);
6312 c->shutting_down = GNUNET_YES;
6313 if (NULL != c->own_channels)
6315 GNUNET_CONTAINER_multihashmap32_iterate (c->own_channels,
6316 &channel_destroy_iterator, c);
6317 GNUNET_CONTAINER_multihashmap32_destroy (c->own_channels);
6320 if (NULL != c->incoming_channels)
6322 GNUNET_CONTAINER_multihashmap32_iterate (c->incoming_channels,
6323 &channel_destroy_iterator, c);
6324 GNUNET_CONTAINER_multihashmap32_destroy (c->incoming_channels);
6327 if (NULL != c->ports)
6329 GNUNET_CONTAINER_multihashmap32_iterate (c->ports,
6330 &client_release_ports, c);
6331 GNUNET_CONTAINER_multihashmap32_destroy (c->ports);
6333 GNUNET_CONTAINER_DLL_remove (clients_head, clients_tail, c);
6334 GNUNET_STATISTICS_update (stats, "# clients", -1, GNUNET_NO);
6335 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client free (%p)\n", c);
6340 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " context NULL!\n");
6342 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done!\n");
6348 * Handler for new clients
6350 * @param cls closure
6351 * @param client identification of the client
6352 * @param message the actual message, which includes messages the client wants
6355 handle_local_new_client (void *cls, struct GNUNET_SERVER_Client *client,
6356 const struct GNUNET_MessageHeader *message)
6358 struct GNUNET_MESH_ClientConnect *cc_msg;
6359 struct MeshClient *c;
6364 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client connected %p\n", client);
6366 /* Check data sanity */
6367 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_ClientConnect);
6368 cc_msg = (struct GNUNET_MESH_ClientConnect *) message;
6369 if (0 != (size % sizeof (uint32_t)))
6372 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6375 size /= sizeof (uint32_t);
6377 /* Initialize new client structure */
6378 c = GNUNET_SERVER_client_get_user_context (client, struct MeshClient);
6379 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client id %u\n", c->id);
6380 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " client has %u ports\n", size);
6385 p = (uint32_t *) &cc_msg[1];
6386 c->ports = GNUNET_CONTAINER_multihashmap32_create (size);
6387 for (i = 0; i < size; i++)
6390 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " port: %u\n", u32);
6392 /* store in client's hashmap */
6393 GNUNET_CONTAINER_multihashmap32_put (c->ports, u32, c,
6394 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
6395 /* store in global hashmap */
6396 /* FIXME only allow one client to have the port open,
6397 * have a backup hashmap with waiting clients */
6398 GNUNET_CONTAINER_multihashmap32_put (ports, u32, c,
6399 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
6403 c->own_channels = GNUNET_CONTAINER_multihashmap32_create (32);
6404 c->incoming_channels = GNUNET_CONTAINER_multihashmap32_create (32);
6405 GNUNET_SERVER_notification_context_add (nc, client);
6406 GNUNET_STATISTICS_update (stats, "# clients", 1, GNUNET_NO);
6408 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6409 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new client processed\n");
6414 * Handler for requests of new tunnels
6416 * @param cls Closure.
6417 * @param client Identification of the client.
6418 * @param message The actual message.
6421 handle_local_channel_create (void *cls, struct GNUNET_SERVER_Client *client,
6422 const struct GNUNET_MessageHeader *message)
6424 struct GNUNET_MESH_ChannelMessage *msg;
6425 struct MeshPeer *peer;
6426 struct MeshTunnel2 *t;
6427 struct MeshChannel *ch;
6428 struct MeshClient *c;
6429 MESH_ChannelNumber chid;
6431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new channel requested\n");
6433 /* Sanity check for client registration */
6434 if (NULL == (c = client_get (client)))
6437 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6440 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6442 /* Message size sanity check */
6443 if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
6446 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6450 msg = (struct GNUNET_MESH_ChannelMessage *) message;
6451 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " towards %s:%u\n",
6452 GNUNET_i2s (&msg->peer), ntohl (msg->port));
6453 chid = ntohl (msg->channel_id);
6455 /* Sanity check for duplicate channel IDs */
6456 if (NULL != channel_get_by_local_id (c, chid))
6459 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6463 peer = peer_get (&msg->peer);
6464 if (NULL == peer->tunnel)
6466 peer->tunnel = tunnel_new ();
6467 peer->tunnel->peer = peer;
6471 /* Create channel */
6472 ch = channel_new (t, c, chid);
6476 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6479 ch->port = ntohl (msg->port);
6480 channel_set_options (ch, ntohl (msg->opt));
6482 /* In unreliable channels, we'll use the DLL to buffer data for the root */
6483 ch->root_rel = GNUNET_new (struct MeshChannelReliability);
6484 ch->root_rel->ch = ch;
6485 ch->root_rel->expected_delay = MESH_RETRANSMIT_TIME;
6487 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "CREATED CHANNEL %s[%x]:%u (%x)\n",
6488 peer2s (t->peer), ch->gid, ch->port, ch->lid_root);
6489 peer_connect (peer);
6491 /* Send create channel */
6493 struct GNUNET_MESH_ChannelCreate msgcc;
6495 msgcc.header.size = htons (sizeof (msgcc));
6496 msgcc.header.type = htons (GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE);
6497 msgcc.chid = htonl (ch->gid);
6498 msgcc.port = msg->port;
6499 msgcc.opt = msg->opt;
6501 tunnel_queue_data (t, ch, &msgcc.header, GNUNET_YES);
6504 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6510 * Handler for requests of deleting tunnels
6512 * @param cls closure
6513 * @param client identification of the client
6514 * @param message the actual message
6517 handle_local_channel_destroy (void *cls, struct GNUNET_SERVER_Client *client,
6518 const struct GNUNET_MessageHeader *message)
6520 struct GNUNET_MESH_ChannelMessage *msg;
6521 struct MeshClient *c;
6522 struct MeshChannel *ch;
6523 struct MeshTunnel2 *t;
6524 MESH_ChannelNumber chid;
6526 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6527 "Got a DESTROY CHANNEL from client!\n");
6529 /* Sanity check for client registration */
6530 if (NULL == (c = client_get (client)))
6533 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6536 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6538 /* Message sanity check */
6539 if (sizeof (struct GNUNET_MESH_ChannelMessage) != ntohs (message->size))
6542 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6546 msg = (struct GNUNET_MESH_ChannelMessage *) message;
6548 /* Retrieve tunnel */
6549 chid = ntohl (msg->channel_id);
6550 ch = channel_get_by_local_id (c, chid);
6553 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, " channel %X not found\n", chid);
6555 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6559 /* Cleanup after the tunnel */
6560 client_delete_channel (c, ch);
6561 if (c == ch->dest && GNUNET_MESH_LOCAL_CHANNEL_ID_SERV <= chid)
6565 else if (c == ch->root && GNUNET_MESH_LOCAL_CHANNEL_ID_SERV > chid)
6571 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
6572 " channel %X client %p (%p, %p)\n",
6573 chid, c, ch->root, ch->dest);
6578 channel_destroy (ch);
6579 tunnel_destroy_if_empty (t);
6581 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6587 * Handler for client traffic
6589 * @param cls closure
6590 * @param client identification of the client
6591 * @param message the actual message
6594 handle_local_data (void *cls, struct GNUNET_SERVER_Client *client,
6595 const struct GNUNET_MessageHeader *message)
6597 struct GNUNET_MESH_LocalData *msg;
6598 struct MeshClient *c;
6599 struct MeshChannel *ch;
6600 struct MeshChannelReliability *rel;
6601 MESH_ChannelNumber chid;
6605 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
6606 "Got data from a client!\n");
6608 /* Sanity check for client registration */
6609 if (NULL == (c = client_get (client)))
6612 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6615 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6617 msg = (struct GNUNET_MESH_LocalData *) message;
6619 /* Sanity check for message size */
6620 size = ntohs (message->size) - sizeof (struct GNUNET_MESH_LocalData);
6621 if (size < sizeof (struct GNUNET_MessageHeader))
6624 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6628 /* Channel exists? */
6629 chid = ntohl (msg->id);
6630 fwd = chid < GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
6631 ch = channel_get_by_local_id (c, chid);
6635 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6639 /* Is the client in the channel? */
6642 ch->root->handle == client)
6646 ch->dest->handle == client) ) )
6649 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6653 rel = fwd ? ch->root_rel : ch->dest_rel;
6654 rel->client_ready = GNUNET_NO;
6656 /* Ok, everything is correct, send the message. */
6658 struct GNUNET_MESH_Data *payload;
6659 uint16_t p2p_size = sizeof(struct GNUNET_MESH_Data) + size;
6660 unsigned char cbuf[p2p_size];
6662 payload = (struct GNUNET_MESH_Data *) cbuf;
6663 payload->mid = htonl (rel->mid_send);
6665 memcpy (&payload[1], &msg[1], size);
6666 payload->header.size = htons (p2p_size);
6667 payload->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_DATA);
6668 payload->chid = htonl (ch->gid);
6669 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " sending on channel...\n");
6670 send_prebuilt_message_channel (&payload->header, ch, fwd);
6672 if (GNUNET_YES == ch->reliable)
6673 channel_save_copy (ch, &payload->header, fwd);
6675 if (tunnel_get_buffer (ch->t, fwd) > 0)
6676 send_local_ack (ch, fwd);
6677 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "receive done OK\n");
6678 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6685 * Handler for client's ACKs for payload traffic.
6687 * @param cls Closure (unused).
6688 * @param client Identification of the client.
6689 * @param message The actual message.
6692 handle_local_ack (void *cls, struct GNUNET_SERVER_Client *client,
6693 const struct GNUNET_MessageHeader *message)
6695 struct GNUNET_MESH_LocalAck *msg;
6696 struct MeshChannelReliability *rel;
6697 struct MeshChannel *ch;
6698 struct MeshClient *c;
6699 MESH_ChannelNumber chid;
6702 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Got a local ACK\n");
6704 /* Sanity check for client registration */
6705 if (NULL == (c = client_get (client)))
6708 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6711 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " by client %u\n", c->id);
6713 msg = (struct GNUNET_MESH_LocalAck *) message;
6715 /* Channel exists? */
6716 chid = ntohl (msg->channel_id);
6717 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " on channel %X\n", chid);
6718 ch = channel_get_by_local_id (c, chid);
6719 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, " -- ch %p\n", ch);
6723 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Channel %X unknown.\n", chid);
6724 GNUNET_log (GNUNET_ERROR_TYPE_WARNING, " for client %u.\n", c->id);
6725 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6729 /* If client is root, the ACK is going FWD, therefore this is "BCK". */
6730 /* If client is dest, the ACK is going BCK, therefore this is "FWD" */
6731 fwd = chid >= GNUNET_MESH_LOCAL_CHANNEL_ID_SERV;
6732 rel = fwd ? ch->dest_rel : ch->root_rel;
6734 rel->client_ready = GNUNET_YES;
6735 channel_send_client_buffered_data (ch, c, fwd);
6736 send_ack (NULL, ch, fwd);
6738 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6745 * Iterator over all tunnels to send a monitoring client info about each tunnel.
6747 * @param cls Closure (client handle).
6748 * @param key Key (hashed tunnel ID, unused).
6749 * @param value Tunnel info.
6751 * @return GNUNET_YES, to keep iterating.
6754 // monitor_all_tunnels_iterator (void *cls,
6755 // const struct GNUNET_HashCode * key,
6758 // struct GNUNET_SERVER_Client *client = cls;
6759 // struct MeshChannel *ch = value;
6760 // struct GNUNET_MESH_LocalMonitor *msg;
6762 // msg = GNUNET_malloc (sizeof(struct GNUNET_MESH_LocalMonitor));
6763 // msg->channel_id = htonl (ch->gid);
6764 // msg->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
6765 // msg->header.type = htons (GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS);
6767 // GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6768 // "* sending info about tunnel %s\n",
6769 // GNUNET_i2s (&msg->owner));
6771 // GNUNET_SERVER_notification_context_unicast (nc, client,
6772 // &msg->header, GNUNET_NO);
6773 // return GNUNET_YES;
6778 * Handler for client's MONITOR request.
6780 * @param cls Closure (unused).
6781 * @param client Identification of the client.
6782 * @param message The actual message.
6785 handle_local_get_tunnels (void *cls, struct GNUNET_SERVER_Client *client,
6786 const struct GNUNET_MessageHeader *message)
6788 struct MeshClient *c;
6790 /* Sanity check for client registration */
6791 if (NULL == (c = client_get (client)))
6794 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6798 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6799 "Received get tunnels request from client %u\n",
6801 // GNUNET_CONTAINER_multihashmap_iterate (tunnels,
6802 // monitor_all_tunnels_iterator,
6804 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6805 "Get tunnels request from client %u completed\n",
6807 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6812 * Handler for client's MONITOR_TUNNEL request.
6814 * @param cls Closure (unused).
6815 * @param client Identification of the client.
6816 * @param message The actual message.
6819 handle_local_show_tunnel (void *cls, struct GNUNET_SERVER_Client *client,
6820 const struct GNUNET_MessageHeader *message)
6822 const struct GNUNET_MESH_LocalMonitor *msg;
6823 struct GNUNET_MESH_LocalMonitor *resp;
6824 struct MeshClient *c;
6825 struct MeshChannel *ch;
6827 /* Sanity check for client registration */
6828 if (NULL == (c = client_get (client)))
6831 GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
6835 msg = (struct GNUNET_MESH_LocalMonitor *) message;
6836 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6837 "Received tunnel info request from client %u for tunnel %s[%X]\n",
6840 ntohl (msg->channel_id));
6841 // ch = channel_get (&msg->owner, ntohl (msg->channel_id));
6845 /* We don't know the tunnel */
6846 struct GNUNET_MESH_LocalMonitor warn;
6849 GNUNET_SERVER_notification_context_unicast (nc, client,
6852 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6856 /* Initialize context */
6857 resp = GNUNET_malloc (sizeof (struct GNUNET_MESH_LocalMonitor));
6859 resp->header.size = htons (sizeof (struct GNUNET_MESH_LocalMonitor));
6860 GNUNET_SERVER_notification_context_unicast (nc, c->handle,
6861 &resp->header, GNUNET_NO);
6864 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
6865 "Monitor tunnel request from client %u completed\n",
6867 GNUNET_SERVER_receive_done (client, GNUNET_OK);
6872 * Functions to handle messages from clients
6874 static struct GNUNET_SERVER_MessageHandler client_handlers[] = {
6875 {&handle_local_new_client, NULL,
6876 GNUNET_MESSAGE_TYPE_MESH_LOCAL_CONNECT, 0},
6877 {&handle_local_channel_create, NULL,
6878 GNUNET_MESSAGE_TYPE_MESH_CHANNEL_CREATE,
6879 sizeof (struct GNUNET_MESH_ChannelMessage)},
6880 {&handle_local_channel_destroy, NULL,
6881 GNUNET_MESSAGE_TYPE_MESH_CHANNEL_DESTROY,
6882 sizeof (struct GNUNET_MESH_ChannelMessage)},
6883 {&handle_local_data, NULL,
6884 GNUNET_MESSAGE_TYPE_MESH_LOCAL_DATA, 0},
6885 {&handle_local_ack, NULL,
6886 GNUNET_MESSAGE_TYPE_MESH_LOCAL_ACK,
6887 sizeof (struct GNUNET_MESH_LocalAck)},
6888 {&handle_local_get_tunnels, NULL,
6889 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNELS,
6890 sizeof (struct GNUNET_MessageHeader)},
6891 {&handle_local_show_tunnel, NULL,
6892 GNUNET_MESSAGE_TYPE_MESH_LOCAL_INFO_TUNNEL,
6893 sizeof (struct GNUNET_MESH_LocalMonitor)},
6899 * Method called whenever a given peer connects.
6901 * @param cls closure
6902 * @param peer peer identity this notification is about
6905 core_connect (void *cls, const struct GNUNET_PeerIdentity *peer)
6907 struct MeshPeer *pi;
6908 struct MeshPeerPath *path;
6910 DEBUG_CONN ("Peer connected\n");
6911 DEBUG_CONN (" %s\n", GNUNET_i2s (&my_full_id));
6912 pi = peer_get (peer);
6915 DEBUG_CONN (" (self)\n");
6916 path = path_new (1);
6920 DEBUG_CONN (" %s\n", GNUNET_i2s (peer));
6921 path = path_new (2);
6922 path->peers[1] = pi->id;
6923 GNUNET_PEER_change_rc (pi->id, 1);
6924 GNUNET_STATISTICS_update (stats, "# peers", 1, GNUNET_NO);
6926 path->peers[0] = myid;
6927 GNUNET_PEER_change_rc (myid, 1);
6928 peer_add_path (pi, path, GNUNET_YES);
6930 pi->connections = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_YES);
6936 * Method called whenever a peer disconnects.
6938 * @param cls closure
6939 * @param peer peer identity this notification is about
6942 core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
6944 struct MeshPeer *pi;
6946 DEBUG_CONN ("Peer disconnected\n");
6947 pi = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
6954 peer_remove_path (pi, myid, pi->id);
6956 GNUNET_CONTAINER_multihashmap_iterate (pi->connections,
6959 GNUNET_CONTAINER_multihashmap_destroy (pi->connections);
6960 pi->connections = NULL;
6963 DEBUG_CONN (" (self)\n");
6965 GNUNET_STATISTICS_update (stats, "# peers", -1, GNUNET_NO);
6972 * Install server (service) handlers and start listening to clients.
6977 GNUNET_SERVER_add_handlers (server_handle, client_handlers);
6978 GNUNET_SERVER_connect_notify (server_handle,
6979 &handle_local_client_connect, NULL);
6980 GNUNET_SERVER_disconnect_notify (server_handle,
6981 &handle_local_client_disconnect, NULL);
6982 nc = GNUNET_SERVER_notification_context_create (server_handle, 1);
6984 clients_head = NULL;
6985 clients_tail = NULL;
6987 GNUNET_SERVER_resume (server_handle);
6992 * To be called on core init/fail.
6994 * @param cls Closure (config)
6995 * @param identity the public identity of this peer
6998 core_init (void *cls,
6999 const struct GNUNET_PeerIdentity *identity)
7001 const struct GNUNET_CONFIGURATION_Handle *c = cls;
7004 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core init\n");
7005 if (0 != memcmp (identity, &my_full_id, sizeof (my_full_id)))
7007 GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Wrong CORE service\n"));
7008 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7010 GNUNET_i2s (identity));
7011 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7013 GNUNET_i2s (&my_full_id));
7014 GNUNET_CORE_disconnect (core_handle);
7015 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
7016 NULL, /* Closure passed to MESH functions */
7017 &core_init, /* Call core_init once connected */
7018 &core_connect, /* Handle connects */
7019 &core_disconnect, /* remove peers on disconnects */
7020 NULL, /* Don't notify about all incoming messages */
7021 GNUNET_NO, /* For header only in notification */
7022 NULL, /* Don't notify about all outbound messages */
7023 GNUNET_NO, /* For header-only out notification */
7024 core_handlers); /* Register these handlers */
7033 /******************************************************************************/
7034 /************************ MAIN FUNCTIONS ****************************/
7035 /******************************************************************************/
7038 * Iterator over tunnel hash map entries to destroy the tunnel during shutdown.
7040 * @param cls closure
7041 * @param key current key code
7042 * @param value value in the hash map
7043 * @return GNUNET_YES if we should continue to iterate,
7047 shutdown_tunnel (void *cls, const struct GNUNET_HashCode * key, void *value)
7049 struct MeshPeer *p = value;
7050 struct MeshTunnel2 *t = p->tunnel;
7059 * Task run during shutdown.
7065 shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
7067 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shutting down\n");
7069 if (core_handle != NULL)
7071 GNUNET_CORE_disconnect (core_handle);
7074 GNUNET_CONTAINER_multihashmap_iterate (peers, &shutdown_tunnel, NULL);
7075 if (dht_handle != NULL)
7077 GNUNET_DHT_disconnect (dht_handle);
7082 GNUNET_SERVER_notification_context_destroy (nc);
7085 if (GNUNET_SCHEDULER_NO_TASK != announce_id_task)
7087 GNUNET_SCHEDULER_cancel (announce_id_task);
7088 announce_id_task = GNUNET_SCHEDULER_NO_TASK;
7090 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "shut down\n");
7095 * Process mesh requests.
7097 * @param cls closure
7098 * @param server the initialized server
7099 * @param c configuration to use
7102 run (void *cls, struct GNUNET_SERVER_Handle *server,
7103 const struct GNUNET_CONFIGURATION_Handle *c)
7106 struct GNUNET_CRYPTO_EccPrivateKey *pk;
7108 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "starting to run\n");
7109 server_handle = server;
7110 GNUNET_SERVER_suspend (server_handle);
7113 GNUNET_CONFIGURATION_get_value_filename (c, "PEER", "PRIVATE_KEY",
7116 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7118 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
7119 "mesh", "peer/privatekey");
7120 GNUNET_SCHEDULER_shutdown ();
7125 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "REFRESH_CONNECTION_TIME",
7126 &refresh_connection_time))
7128 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7130 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
7131 "mesh", "refresh path time");
7132 GNUNET_SCHEDULER_shutdown ();
7137 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "ID_ANNOUNCE_TIME",
7140 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7142 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
7143 "mesh", "id announce time");
7144 GNUNET_SCHEDULER_shutdown ();
7149 GNUNET_CONFIGURATION_get_value_time (c, "MESH", "CONNECT_TIMEOUT",
7152 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7154 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
7155 "mesh", "connect timeout");
7156 GNUNET_SCHEDULER_shutdown ();
7161 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_MSGS_QUEUE",
7164 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7166 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
7167 "mesh", "max msgs queue");
7168 GNUNET_SCHEDULER_shutdown ();
7173 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_CONNECTIONS",
7176 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
7178 ("%s service is lacking key configuration settings (%s). Exiting.\n"),
7179 "mesh", "max tunnels");
7180 GNUNET_SCHEDULER_shutdown ();
7185 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DEFAULT_TTL",
7188 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7190 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
7191 "mesh", "default ttl", 64);
7196 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "MAX_PEERS",
7199 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7200 _("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
7201 "mesh", "max peers", 1000);
7206 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DROP_PERCENT",
7213 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7214 "Mesh is running with drop mode enabled. "
7215 "This is NOT a good idea! "
7216 "Remove the DROP_PERCENT option from your configuration.\n");
7220 GNUNET_CONFIGURATION_get_value_number (c, "MESH", "DHT_REPLICATION_LEVEL",
7221 &dht_replication_level))
7223 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
7225 ("%s service is lacking key configuration settings (%s). Using default (%u).\n"),
7226 "mesh", "dht replication level", 3);
7227 dht_replication_level = 3;
7230 connections = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_YES);
7231 peers = GNUNET_CONTAINER_multihashmap_create (32, GNUNET_NO);
7232 ports = GNUNET_CONTAINER_multihashmap32_create (32);
7234 dht_handle = GNUNET_DHT_connect (c, 64);
7235 if (NULL == dht_handle)
7239 stats = GNUNET_STATISTICS_create ("mesh", c);
7241 /* Scheduled the task to clean up when shutdown is called */
7242 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
7244 pk = GNUNET_CRYPTO_ecc_key_create_from_file (keyfile);
7245 GNUNET_free (keyfile);
7246 GNUNET_assert (NULL != pk);
7247 my_private_key = pk;
7248 GNUNET_CRYPTO_ecc_key_get_public (my_private_key, &my_public_key);
7249 GNUNET_CRYPTO_hash (&my_public_key, sizeof (my_public_key),
7250 &my_full_id.hashPubKey);
7251 myid = GNUNET_PEER_intern (&my_full_id);
7252 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
7253 "Mesh for peer [%s] starting\n",
7254 GNUNET_i2s(&my_full_id));
7256 core_handle = GNUNET_CORE_connect (c, /* Main configuration */
7257 NULL, /* Closure passed to MESH functions */
7258 &core_init, /* Call core_init once connected */
7259 &core_connect, /* Handle connects */
7260 &core_disconnect, /* remove peers on disconnects */
7261 NULL, /* Don't notify about all incoming messages */
7262 GNUNET_NO, /* For header only in notification */
7263 NULL, /* Don't notify about all outbound messages */
7264 GNUNET_NO, /* For header-only out notification */
7265 core_handlers); /* Register these handlers */
7266 if (NULL == core_handle)
7269 GNUNET_SCHEDULER_shutdown ();
7272 announce_id_task = GNUNET_SCHEDULER_add_now (&announce_id, cls);
7273 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Mesh service running\n");
7278 * The main function for the mesh service.
7280 * @param argc number of arguments from the command line
7281 * @param argv command line arguments
7282 * @return 0 ok, 1 on error
7285 main (int argc, char *const *argv)
7290 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main()\n");
7291 r = GNUNET_SERVICE_run (argc, argv, "mesh", GNUNET_SERVICE_OPTION_NONE, &run,
7293 ret = (GNUNET_OK == r) ? 0 : 1;
7294 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "main() END\n");