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20 * @file cadet/gnunet-service-cadet.c
21 * @brief GNUnet CADET service with encryption
22 * @author Bartlomiej Polot
23 * @author Christian Grothoff
26 * - peer: other cadet instance. If there is direct connection it's a neighbor.
27 * - path: series of directly connected peer from one peer to another.
28 * - connection: path which is being used in a tunnel.
29 * - tunnel: encrypted connection to a peer, neighbor or not.
30 * - channel: logical link between two clients, on the same or different peers.
31 * have properties like reliability.
35 #include "gnunet_util_lib.h"
37 #include "gnunet_statistics_service.h"
38 #include "gnunet-service-cadet.h"
39 #include "gnunet-service-cadet_channel.h"
40 #include "gnunet-service-cadet_connection.h"
41 #include "gnunet-service-cadet_core.h"
42 #include "gnunet-service-cadet_dht.h"
43 #include "gnunet-service-cadet_hello.h"
44 #include "gnunet-service-cadet_tunnels.h"
45 #include "gnunet-service-cadet_peer.h"
46 #include "gnunet-service-cadet_paths.h"
48 #define LOG(level, ...) GNUNET_log (level,__VA_ARGS__)
52 * Struct containing information about a client of the service
59 struct CadetClient *next;
64 struct CadetClient *prev;
67 * Tunnels that belong to this client, indexed by local id,
68 * value is a `struct CadetChannel`.
70 struct GNUNET_CONTAINER_MultiHashMap32 *channels;
73 * Handle to communicate with the client
75 struct GNUNET_MQ_Handle *mq;
80 struct GNUNET_SERVICE_Client *client;
83 * Ports that this client has declared interest in.
84 * Indexed by port, contains `struct OpenPort`
86 struct GNUNET_CONTAINER_MultiHashMap *ports;
89 * Channel ID to use for the next incoming channel for this client.
90 * Wraps around (in theory).
92 struct GNUNET_CADET_ClientChannelNumber next_ccn;
95 * ID of the client, mainly for debug messages. Purely internal to this file.
101 /******************************************************************************/
102 /*********************** GLOBAL VARIABLES ****************************/
103 /******************************************************************************/
105 /****************************** Global variables ******************************/
108 * Handle to our configuration.
110 const struct GNUNET_CONFIGURATION_Handle *cfg;
113 * Handle to the statistics service.
115 struct GNUNET_STATISTICS_Handle *stats;
118 * Handle to communicate with ATS.
120 struct GNUNET_ATS_ConnectivityHandle *ats_ch;
125 struct GNUNET_PeerIdentity my_full_id;
130 struct GNUNET_CRYPTO_EddsaPrivateKey *my_private_key;
133 * Signal that shutdown is happening: prevent recovery measures.
138 * DLL with all the clients, head.
140 static struct CadetClient *clients_head;
143 * DLL with all the clients, tail.
145 static struct CadetClient *clients_tail;
148 * Next ID to assign to a client.
150 static unsigned int next_client_id;
153 * All ports clients of this peer have opened. Maps from
154 * a hashed port to a `struct OpenPort`.
156 struct GNUNET_CONTAINER_MultiHashMap *open_ports;
159 * Map from ports to channels where the ports were closed at the
160 * time we got the inbound connection.
161 * Indexed by h_port, contains `struct CadetChannel`.
163 struct GNUNET_CONTAINER_MultiHashMap *loose_channels;
166 * Map from PIDs to `struct CadetPeer` entries.
168 struct GNUNET_CONTAINER_MultiPeerMap *peers;
171 * Map from `struct GNUNET_CADET_ConnectionTunnelIdentifier`
172 * hash codes to `struct CadetConnection` objects.
174 struct GNUNET_CONTAINER_MultiShortmap *connections;
177 * How many messages are needed to trigger an AXOLOTL ratchet advance.
179 unsigned long long ratchet_messages;
182 * How long until we trigger a ratched advance due to time.
184 struct GNUNET_TIME_Relative ratchet_time;
187 * How frequently do we send KEEPALIVE messages on idle connections?
189 struct GNUNET_TIME_Relative keepalive_period;
192 * Set to non-zero values to create random drops to test retransmissions.
194 unsigned long long drop_percent;
198 * Send a message to a client.
200 * @param c client to get the message
201 * @param env envelope with the message
204 GSC_send_to_client (struct CadetClient *c,
205 struct GNUNET_MQ_Envelope *env)
207 GNUNET_MQ_send (c->mq,
213 * Return identifier for a client as a string.
215 * @param c client to identify
216 * @return string for debugging
219 GSC_2s (struct CadetClient *c)
223 GNUNET_snprintf (buf,
232 * Lookup channel of client @a c by @a ccn.
234 * @param c client to look in
235 * @param ccn channel ID to look up
236 * @return NULL if no such channel exists
238 static struct CadetChannel *
239 lookup_channel (struct CadetClient *c,
240 struct GNUNET_CADET_ClientChannelNumber ccn)
242 return GNUNET_CONTAINER_multihashmap32_get (c->channels,
243 ntohl (ccn.channel_of_client));
248 * Obtain the next LID to use for incoming connections to
251 * @param c client handle
253 static struct GNUNET_CADET_ClientChannelNumber
254 client_get_next_ccn (struct CadetClient *c)
256 struct GNUNET_CADET_ClientChannelNumber ccn = c->next_ccn;
258 /* increment until we have a free one... */
263 ccn.channel_of_client
264 = htonl (1 + (ntohl (ccn.channel_of_client)));
265 if (ntohl (ccn.channel_of_client) >=
266 GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
267 ccn.channel_of_client = htonl (0);
269 c->next_ccn.channel_of_client
270 = htonl (1 + (ntohl (ccn.channel_of_client)));
276 * Bind incoming channel to this client, and notify client about
277 * incoming connection. Caller is responsible for notifying the other
278 * peer about our acceptance of the channel.
280 * @param c client to bind to
281 * @param ch channel to be bound
282 * @param dest peer that establishes the connection
283 * @param port port number
284 * @param options options
285 * @return local channel number assigned to the new client
287 struct GNUNET_CADET_ClientChannelNumber
288 GSC_bind (struct CadetClient *c,
289 struct CadetChannel *ch,
290 struct CadetPeer *dest,
291 const struct GNUNET_HashCode *port,
294 struct GNUNET_MQ_Envelope *env;
295 struct GNUNET_CADET_LocalChannelCreateMessage *cm;
296 struct GNUNET_CADET_ClientChannelNumber ccn;
298 ccn = client_get_next_ccn (c);
299 GNUNET_assert (GNUNET_YES ==
300 GNUNET_CONTAINER_multihashmap32_put (c->channels,
301 ntohl (ccn.channel_of_client),
303 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
304 LOG (GNUNET_ERROR_TYPE_DEBUG,
305 "Accepting incoming %s from %s on open port %s (%u), assigning ccn %X\n",
309 (uint32_t) ntohl (options),
310 (uint32_t) ntohl (ccn.channel_of_client));
311 /* notify local client about incoming connection! */
312 env = GNUNET_MQ_msg (cm,
313 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE);
316 cm->opt = htonl (options);
317 cm->peer = *GCP_get_id (dest);
318 GSC_send_to_client (c,
325 * Callback invoked on all peers to destroy all tunnels
326 * that may still exist.
329 * @param pid identify of a peer
330 * @param value a `struct CadetPeer` that may still have a tunnel
331 * @return #GNUNET_OK (iterate over all entries)
334 destroy_tunnels_now (void *cls,
335 const struct GNUNET_PeerIdentity *pid,
338 struct CadetPeer *cp = value;
339 struct CadetTunnel *t = GCP_get_tunnel (cp,
343 GCT_destroy_tunnel_now (t);
349 * Callback invoked on all peers to destroy all tunnels
350 * that may still exist.
353 * @param pid identify of a peer
354 * @param value a `struct CadetPeer` that may still have a tunnel
355 * @return #GNUNET_OK (iterate over all entries)
358 destroy_paths_now (void *cls,
359 const struct GNUNET_PeerIdentity *pid,
362 struct CadetPeer *cp = value;
364 GCP_drop_owned_paths (cp);
370 * Shutdown everything once the clients have disconnected.
377 GNUNET_STATISTICS_destroy (stats,
381 if (NULL != open_ports)
383 GNUNET_CONTAINER_multihashmap_destroy (open_ports);
386 if (NULL != loose_channels)
388 GNUNET_CONTAINER_multihashmap_destroy (loose_channels);
389 loose_channels = NULL;
391 /* Destroy tunnels. Note that all channels must be destroyed first! */
392 GCP_iterate_all (&destroy_tunnels_now,
394 /* All tunnels, channels, connections and CORE must be down before this point. */
395 GCP_iterate_all (&destroy_paths_now,
397 /* All paths, tunnels, channels, connections and CORE must be down before this point. */
398 GCP_destroy_all_peers ();
401 GNUNET_CONTAINER_multipeermap_destroy (peers);
404 if (NULL != connections)
406 GNUNET_CONTAINER_multishortmap_destroy (connections);
411 GNUNET_ATS_connectivity_done (ats_ch);
416 GNUNET_free_non_null (my_private_key);
417 my_private_key = NULL;
422 * Task run during shutdown.
427 shutdown_task (void *cls)
429 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
431 shutting_down = GNUNET_YES;
433 if (NULL == clients_head)
439 * We had a remote connection @a value to port @a h_port before
440 * client @a cls opened port @a port. Bind them now.
442 * @param cls the `struct CadetClient`
443 * @param h_port the hashed port
444 * @param value the `struct CadetChannel`
445 * @return #GNUNET_YES (iterate over all such channels)
448 bind_loose_channel (void *cls,
449 const struct GNUNET_HashCode *port,
452 struct OpenPort *op = cls;
453 struct CadetChannel *ch = value;
458 GNUNET_assert (GNUNET_YES ==
459 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
467 * Handle port open request. Creates a mapping from the
468 * port to the respective client and checks whether we have
469 * loose channels trying to bind to the port. If so, those
472 * @param cls Identification of the client.
473 * @param pmsg The actual message.
476 handle_port_open (void *cls,
477 const struct GNUNET_CADET_PortMessage *pmsg)
479 struct CadetClient *c = cls;
482 LOG (GNUNET_ERROR_TYPE_DEBUG,
483 "Open port %s requested by %s\n",
484 GNUNET_h2s (&pmsg->port),
486 if (NULL == c->ports)
487 c->ports = GNUNET_CONTAINER_multihashmap_create (4,
489 op = GNUNET_new (struct OpenPort);
491 op->port = pmsg->port;
492 GCCH_hash_port (&op->h_port,
496 GNUNET_CONTAINER_multihashmap_put (c->ports,
499 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
502 GNUNET_SERVICE_client_drop (c->client);
505 (void) GNUNET_CONTAINER_multihashmap_put (open_ports,
508 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
509 GNUNET_CONTAINER_multihashmap_get_multiple (loose_channels,
513 GNUNET_SERVICE_client_continue (c->client);
518 * Handler for port close requests. Marks this port as closed
519 * (unless of course we have another client with the same port
520 * open). Note that existing channels accepted on the port are
523 * @param cls Identification of the client.
524 * @param pmsg The actual message.
527 handle_port_close (void *cls,
528 const struct GNUNET_CADET_PortMessage *pmsg)
530 struct CadetClient *c = cls;
533 LOG (GNUNET_ERROR_TYPE_DEBUG,
534 "Closing port %s as requested by %s\n",
535 GNUNET_h2s (&pmsg->port),
537 if (NULL == c->ports)
539 /* Client closed a port despite _never_ having opened one? */
541 GNUNET_SERVICE_client_drop (c->client);
544 op = GNUNET_CONTAINER_multihashmap_get (c->ports,
549 GNUNET_SERVICE_client_drop (c->client);
552 GNUNET_assert (GNUNET_YES ==
553 GNUNET_CONTAINER_multihashmap_remove (c->ports,
556 GNUNET_assert (GNUNET_YES ==
557 GNUNET_CONTAINER_multihashmap_remove (open_ports,
561 GNUNET_SERVICE_client_continue (c->client);
566 * Handler for requests for us creating a new channel to another peer and port.
568 * @param cls Identification of the client.
569 * @param tcm The actual message.
572 handle_channel_create (void *cls,
573 const struct GNUNET_CADET_LocalChannelCreateMessage *tcm)
575 struct CadetClient *c = cls;
576 struct CadetChannel *ch;
578 if (ntohl (tcm->ccn.channel_of_client) < GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
580 /* Channel ID not in allowed range. */
582 GNUNET_SERVICE_client_drop (c->client);
585 ch = lookup_channel (c,
589 /* Channel ID already in use. Not allowed. */
591 GNUNET_SERVICE_client_drop (c->client);
594 LOG (GNUNET_ERROR_TYPE_DEBUG,
595 "New channel to %s at port %s requested by %s\n",
596 GNUNET_i2s (&tcm->peer),
597 GNUNET_h2s (&tcm->port),
601 ch = GCCH_channel_local_new (c,
610 GNUNET_SERVICE_client_drop (c->client);
613 GNUNET_assert (GNUNET_YES ==
614 GNUNET_CONTAINER_multihashmap32_put (c->channels,
615 ntohl (tcm->ccn.channel_of_client),
617 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
619 GNUNET_SERVICE_client_continue (c->client);
624 * Handler for requests of destroying an existing channel.
626 * @param cls client identification of the client
627 * @param msg the actual message
630 handle_channel_destroy (void *cls,
631 const struct GNUNET_CADET_LocalChannelDestroyMessage *msg)
633 struct CadetClient *c = cls;
634 struct CadetChannel *ch;
636 ch = lookup_channel (c,
640 /* Client attempted to destroy unknown channel.
641 Can happen if the other side went down at the same time.*/
642 LOG (GNUNET_ERROR_TYPE_DEBUG,
643 "%s tried to destroy unknown channel %X\n",
645 (uint32_t) ntohl (msg->ccn.channel_of_client));
646 GNUNET_SERVICE_client_continue (c->client);
649 LOG (GNUNET_ERROR_TYPE_DEBUG,
650 "%s is destroying %s\n",
653 GNUNET_assert (GNUNET_YES ==
654 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
655 ntohl (msg->ccn.channel_of_client),
657 GCCH_channel_local_destroy (ch,
660 GNUNET_SERVICE_client_continue (c->client);
665 * Check for client traffic data message is well-formed.
667 * @param cls identification of the client
668 * @param msg the actual message
669 * @return #GNUNET_OK if @a msg is OK, #GNUNET_SYSERR if not
672 check_local_data (void *cls,
673 const struct GNUNET_CADET_LocalData *msg)
676 size_t payload_claimed_size;
678 struct GNUNET_MessageHeader pa;
680 /* FIXME: what is the format we shall allow for @a msg?
681 ONE payload item or multiple? Seems current cadet_api
682 at least in theory allows more than one. Next-gen
683 cadet_api will likely no more, so we could then
684 simplify this mess again. */
685 /* Sanity check for message size */
686 payload_size = ntohs (msg->header.size) - sizeof (*msg);
687 buf = (const char *) &msg[1];
688 while (payload_size >= sizeof (struct GNUNET_MessageHeader))
690 /* need to memcpy() for alignment */
694 payload_claimed_size = ntohs (pa.size);
695 if ( (payload_size < payload_claimed_size) ||
696 (payload_claimed_size < sizeof (struct GNUNET_MessageHeader)) ||
697 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < payload_claimed_size) )
700 LOG (GNUNET_ERROR_TYPE_DEBUG,
701 "Local data of %u total size had sub-message %u at %u with %u bytes\n",
702 ntohs (msg->header.size),
704 (unsigned int) (buf - (const char *) &msg[1]),
705 (unsigned int) payload_claimed_size);
706 return GNUNET_SYSERR;
708 payload_size -= payload_claimed_size;
709 buf += payload_claimed_size;
711 if (0 != payload_size)
714 return GNUNET_SYSERR;
721 * Handler for client payload traffic to be send on a channel to
724 * @param cls identification of the client
725 * @param msg the actual message
728 handle_local_data (void *cls,
729 const struct GNUNET_CADET_LocalData *msg)
731 struct CadetClient *c = cls;
732 struct CadetChannel *ch;
736 ch = lookup_channel (c,
740 /* Channel does not exist (anymore) */
741 LOG (GNUNET_ERROR_TYPE_WARNING,
742 "Dropping payload for channel %u from client (channel unknown, other endpoint may have disconnected)\n",
743 (unsigned int) ntohl (msg->ccn.channel_of_client));
744 GNUNET_SERVICE_client_continue (c->client);
747 payload_size = ntohs (msg->header.size) - sizeof (*msg);
748 GNUNET_STATISTICS_update (stats,
749 "# payload received from clients",
752 buf = (const char *) &msg[1];
753 LOG (GNUNET_ERROR_TYPE_DEBUG,
754 "Received %u bytes payload from %s for %s\n",
755 (unsigned int) payload_size,
759 GCCH_handle_local_data (ch,
765 GNUNET_SERVICE_client_drop (c->client);
768 GNUNET_SERVICE_client_continue (c->client);
773 * Handler for client's ACKs for payload traffic.
775 * @param cls identification of the client.
776 * @param msg The actual message.
779 handle_local_ack (void *cls,
780 const struct GNUNET_CADET_LocalAck *msg)
782 struct CadetClient *c = cls;
783 struct CadetChannel *ch;
785 ch = lookup_channel (c,
789 /* Channel does not exist (anymore) */
790 LOG (GNUNET_ERROR_TYPE_WARNING,
791 "Ignoring local ACK for channel %u from client (channel unknown, other endpoint may have disconnected)\n",
792 (unsigned int) ntohl (msg->ccn.channel_of_client));
793 GNUNET_SERVICE_client_continue (c->client);
796 LOG (GNUNET_ERROR_TYPE_DEBUG,
797 "Got a local ACK from %s for %s\n",
800 GCCH_handle_local_ack (ch,
802 GNUNET_SERVICE_client_continue (c->client);
807 * Iterator over all peers to send a monitoring client info about each peer.
809 * @param cls Closure ().
810 * @param peer Peer ID (tunnel remote peer).
811 * @param value Peer info.
812 * @return #GNUNET_YES, to keep iterating.
815 get_all_peers_iterator (void *cls,
816 const struct GNUNET_PeerIdentity *peer,
819 struct CadetClient *c = cls;
820 struct CadetPeer *p = value;
821 struct GNUNET_MQ_Envelope *env;
822 struct GNUNET_CADET_LocalInfoPeer *msg;
824 env = GNUNET_MQ_msg (msg,
825 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
826 msg->destination = *peer;
827 msg->paths = htons (GCP_count_paths (p));
828 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
830 GNUNET_MQ_send (c->mq,
837 * Handler for client's INFO PEERS request.
839 * @param cls Identification of the client.
840 * @param message The actual message.
843 handle_get_peers (void *cls,
844 const struct GNUNET_MessageHeader *message)
846 struct CadetClient *c = cls;
847 struct GNUNET_MQ_Envelope *env;
848 struct GNUNET_MessageHeader *reply;
850 GCP_iterate_all (&get_all_peers_iterator,
852 env = GNUNET_MQ_msg (reply,
853 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
854 GNUNET_MQ_send (c->mq,
856 GNUNET_SERVICE_client_continue (c->client);
861 * Iterator over all paths of a peer to build an InfoPeer message.
862 * Message contains blocks of peers, first not included.
864 * @param cls message queue for transmission
865 * @param path Path itself
866 * @param off offset of the peer on @a path
867 * @return #GNUNET_YES if should keep iterating.
868 * #GNUNET_NO otherwise.
871 path_info_iterator (void *cls,
872 struct CadetPeerPath *path,
875 struct GNUNET_MQ_Handle *mq = cls;
876 struct GNUNET_MQ_Envelope *env;
877 struct GNUNET_CADET_LocalInfoPeer *resp;
878 struct GNUNET_PeerIdentity *id;
881 unsigned int path_length;
883 path_length = GCPP_get_length (path);
884 path_size = sizeof (struct GNUNET_PeerIdentity) * path_length;
885 if (sizeof (*resp) + path_size > UINT16_MAX)
887 LOG (GNUNET_ERROR_TYPE_WARNING,
888 "Path of %u entries is too long for info message\n",
892 env = GNUNET_MQ_msg_extra (resp,
894 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
897 resp->offset = htons(off);
898 resp->finished_with_paths = htons(0);
900 id = (struct GNUNET_PeerIdentity *) &resp[1];
902 /* Don't copy first peer. First peer is always the local one. Last
903 * peer is always the destination (leave as 0, EOL).
905 for (i = 0; i <= off; i++)
906 id[i] = *GCP_get_id (GCPP_get_peer_at_offset (path,
914 * Getting summary information about the number of paths and if a tunnel exists,
915 * and the indirect paths to a peer, if there are ones.
917 * @param cls Closure ().
918 * @param peer Peer ID (tunnel remote peer).
919 * @param value Peer info.
920 * @return #GNUNET_YES, to keep iterating.
923 get_peer_info (void *cls,
924 const struct GNUNET_PeerIdentity *peer,
927 struct CadetClient *c = cls;
928 struct GNUNET_MQ_Envelope *env;
929 struct GNUNET_CADET_LocalInfoPeer *msg;
931 env = GNUNET_MQ_msg (msg,
932 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
933 msg->offset = htons(0);
934 msg->destination = *peer;
935 msg->paths = htons (GCP_count_paths (p));
936 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
938 msg->finished_with_paths = htons(0);
939 GNUNET_MQ_send (c->mq,
941 GCP_iterate_indirect_paths (p,
948 * Handler for client's SHOW_PEER request.
950 * @param cls Identification of the client.
951 * @param msg The actual message.
954 handle_show_peer (void *cls,
955 const struct GNUNET_CADET_LocalInfo *msg)
957 struct CadetClient *c = cls;
959 struct GNUNET_MQ_Envelope *env;
960 struct GNUNET_CADET_LocalInfoPeer *resp;
962 p = GCP_get (&msg->peer,
965 get_peer_info(c, &(msg->peer), p);
969 env = GNUNET_MQ_msg (resp,
970 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
971 resp->finished_with_paths = htons(1);
972 resp->destination = msg->peer;
974 GNUNET_MQ_send (c->mq,
977 GNUNET_SERVICE_client_continue (c->client);
982 * Iterator over all tunnels to send a monitoring client info about each tunnel.
984 * @param cls Closure ().
985 * @param peer Peer ID (tunnel remote peer).
986 * @param value a `struct CadetPeer`
987 * @return #GNUNET_YES, to keep iterating.
990 get_all_tunnels_iterator (void *cls,
991 const struct GNUNET_PeerIdentity *peer,
994 struct CadetClient *c = cls;
995 struct CadetPeer *p = value;
996 struct GNUNET_MQ_Envelope *env;
997 struct GNUNET_CADET_LocalInfoTunnel *msg;
998 struct CadetTunnel *t;
1000 t = GCP_get_tunnel (p,
1004 env = GNUNET_MQ_msg (msg,
1005 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
1006 msg->destination = *peer;
1007 msg->channels = htonl (GCT_count_channels (t));
1008 msg->connections = htonl (GCT_count_any_connections (t));
1009 msg->cstate = htons (0);
1010 msg->estate = htons ((uint16_t) GCT_get_estate (t));
1011 GNUNET_MQ_send (c->mq,
1018 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS request.
1020 * @param cls client Identification of the client.
1021 * @param message The actual message.
1024 handle_info_tunnels (void *cls,
1025 const struct GNUNET_MessageHeader *message)
1027 struct CadetClient *c = cls;
1028 struct GNUNET_MQ_Envelope *env;
1029 struct GNUNET_MessageHeader *reply;
1031 GCP_iterate_all (&get_all_tunnels_iterator,
1033 env = GNUNET_MQ_msg (reply,
1034 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
1035 GNUNET_MQ_send (c->mq,
1037 GNUNET_SERVICE_client_continue (c->client);
1042 * Update the message with information about the connection.
1044 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
1045 * @param ct a connection about which we should store information in @a cls
1048 iter_connection (void *cls,
1049 struct CadetTConnection *ct)
1051 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
1052 struct CadetConnection *cc = ct->cc;
1053 struct GNUNET_CADET_ConnectionTunnelIdentifier *h;
1055 h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
1056 h[msg->connections++] = *(GCC_get_id (cc));
1061 * Update the message with information about the channel.
1063 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
1064 * @param ch a channel about which we should store information in @a cls
1067 iter_channel (void *cls,
1068 struct CadetChannel *ch)
1070 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
1071 struct GNUNET_CADET_ConnectionTunnelIdentifier *h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
1072 struct GNUNET_CADET_ChannelTunnelNumber *chn
1073 = (struct GNUNET_CADET_ChannelTunnelNumber *) &h[msg->connections];
1075 chn[msg->channels++] = GCCH_get_id (ch);
1080 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL request.
1082 * @param cls Identification of the client.
1083 * @param msg The actual message.
1086 handle_info_tunnel (void *cls,
1087 const struct GNUNET_CADET_LocalInfo *msg)
1089 struct CadetClient *c = cls;
1090 struct GNUNET_MQ_Envelope *env;
1091 struct GNUNET_CADET_LocalInfoTunnel *resp;
1092 struct CadetTunnel *t;
1093 struct CadetPeer *p;
1097 p = GCP_get (&msg->peer,
1099 t = GCP_get_tunnel (p,
1103 /* We don't know the tunnel */
1104 struct GNUNET_MQ_Envelope *env;
1105 struct GNUNET_CADET_LocalInfoTunnel *warn;
1107 LOG (GNUNET_ERROR_TYPE_INFO,
1108 "Tunnel to %s unknown\n",
1109 GNUNET_i2s_full (&msg->peer));
1110 env = GNUNET_MQ_msg (warn,
1111 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1112 warn->destination = msg->peer;
1113 GNUNET_MQ_send (c->mq,
1115 GNUNET_SERVICE_client_continue (c->client);
1119 /* Initialize context */
1120 ch_n = GCT_count_channels (t);
1121 c_n = GCT_count_any_connections (t);
1122 env = GNUNET_MQ_msg_extra (resp,
1123 c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier) +
1124 ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber),
1125 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1126 resp->destination = msg->peer;
1127 /* Do not reorder! #iter_channel needs counters in HBO! */
1128 GCT_iterate_connections (t,
1131 GCT_iterate_channels (t,
1134 resp->connections = htonl (resp->connections);
1135 resp->channels = htonl (resp->channels);
1136 resp->cstate = htons (0);
1137 resp->estate = htons (GCT_get_estate (t));
1138 GNUNET_MQ_send (c->mq,
1140 GNUNET_SERVICE_client_continue (c->client);
1145 * Iterator over all peers to dump info for each peer.
1147 * @param cls Closure (unused).
1148 * @param peer Peer ID (tunnel remote peer).
1149 * @param value Peer info.
1151 * @return #GNUNET_YES, to keep iterating.
1154 show_peer_iterator (void *cls,
1155 const struct GNUNET_PeerIdentity *peer,
1158 struct CadetPeer *p = value;
1159 struct CadetTunnel *t;
1161 t = GCP_get_tunnel (p,
1165 GNUNET_ERROR_TYPE_ERROR);
1166 LOG (GNUNET_ERROR_TYPE_ERROR, "\n");
1172 * Handler for client's INFO_DUMP request.
1174 * @param cls Identification of the client.
1175 * @param message The actual message.
1178 handle_info_dump (void *cls,
1179 const struct GNUNET_MessageHeader *message)
1181 struct CadetClient *c = cls;
1183 LOG (GNUNET_ERROR_TYPE_INFO,
1184 "Received dump info request from client %u\n",
1187 LOG (GNUNET_ERROR_TYPE_ERROR,
1188 "*************************** DUMP START ***************************\n");
1189 for (struct CadetClient *ci = clients_head;
1193 LOG (GNUNET_ERROR_TYPE_ERROR,
1194 "Client %u (%p), handle: %p, ports: %u, channels: %u\n",
1199 ? GNUNET_CONTAINER_multihashmap_size (ci->ports)
1201 GNUNET_CONTAINER_multihashmap32_size (ci->channels));
1203 LOG (GNUNET_ERROR_TYPE_ERROR, "***************************\n");
1204 GCP_iterate_all (&show_peer_iterator,
1207 LOG (GNUNET_ERROR_TYPE_ERROR,
1208 "**************************** DUMP END ****************************\n");
1210 GNUNET_SERVICE_client_continue (c->client);
1216 * Callback called when a client connects to the service.
1218 * @param cls closure for the service
1219 * @param client the new client that connected to the service
1220 * @param mq the message queue used to send messages to the client
1224 client_connect_cb (void *cls,
1225 struct GNUNET_SERVICE_Client *client,
1226 struct GNUNET_MQ_Handle *mq)
1228 struct CadetClient *c;
1230 c = GNUNET_new (struct CadetClient);
1233 c->id = next_client_id++; /* overflow not important: just for debug */
1235 = GNUNET_CONTAINER_multihashmap32_create (32);
1236 GNUNET_CONTAINER_DLL_insert (clients_head,
1239 GNUNET_STATISTICS_update (stats,
1243 LOG (GNUNET_ERROR_TYPE_DEBUG,
1251 * A channel was destroyed by the other peer. Tell our client.
1253 * @param c client that lost a channel
1254 * @param ccn channel identification number for the client
1255 * @param ch the channel object
1258 GSC_handle_remote_channel_destroy (struct CadetClient *c,
1259 struct GNUNET_CADET_ClientChannelNumber ccn,
1260 struct CadetChannel *ch)
1262 struct GNUNET_MQ_Envelope *env;
1263 struct GNUNET_CADET_LocalChannelDestroyMessage *tdm;
1265 env = GNUNET_MQ_msg (tdm,
1266 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY);
1268 GSC_send_to_client (c,
1270 GNUNET_assert (GNUNET_YES ==
1271 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1272 ntohl (ccn.channel_of_client),
1278 * A client that created a loose channel that was not bound to a port
1279 * disconnected, drop it from the #loose_channels list.
1281 * @param h_port the hashed port the channel was trying to bind to
1282 * @param ch the channel that was lost
1285 GSC_drop_loose_channel (const struct GNUNET_HashCode *h_port,
1286 struct CadetChannel *ch)
1288 GNUNET_assert (GNUNET_YES ==
1289 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
1296 * Iterator for deleting each channel whose client endpoint disconnected.
1298 * @param cls Closure (client that has disconnected).
1299 * @param key The local channel id in host byte order
1300 * @param value The value stored at the key (channel to destroy).
1301 * @return #GNUNET_OK, keep iterating.
1304 channel_destroy_iterator (void *cls,
1308 struct CadetClient *c = cls;
1309 struct GNUNET_CADET_ClientChannelNumber ccn;
1310 struct CadetChannel *ch = value;
1312 LOG (GNUNET_ERROR_TYPE_DEBUG,
1313 "Destroying %s, due to %s disconnecting.\n",
1316 ccn.channel_of_client = htonl (key);
1317 GCCH_channel_local_destroy (ch,
1320 GNUNET_assert (GNUNET_YES ==
1321 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1329 * Remove client's ports from the global hashmap on disconnect.
1331 * @param cls the `struct CadetClient`
1332 * @param port the port.
1333 * @param value the `struct OpenPort` to remove
1334 * @return #GNUNET_OK, keep iterating.
1337 client_release_ports (void *cls,
1338 const struct GNUNET_HashCode *port,
1341 struct CadetClient *c = cls;
1342 struct OpenPort *op = value;
1344 GNUNET_assert (c == op->c);
1345 LOG (GNUNET_ERROR_TYPE_DEBUG,
1346 "Closing port %s due to %s disconnect.\n",
1349 GNUNET_assert (GNUNET_YES ==
1350 GNUNET_CONTAINER_multihashmap_remove (open_ports,
1353 GNUNET_assert (GNUNET_YES ==
1354 GNUNET_CONTAINER_multihashmap_remove (c->ports,
1363 * Callback called when a client disconnected from the service
1365 * @param cls closure for the service
1366 * @param client the client that disconnected
1367 * @param internal_cls should be equal to @a c
1370 client_disconnect_cb (void *cls,
1371 struct GNUNET_SERVICE_Client *client,
1374 struct CadetClient *c = internal_cls;
1376 GNUNET_assert (c->client == client);
1377 LOG (GNUNET_ERROR_TYPE_DEBUG,
1378 "%s is disconnecting.\n",
1380 if (NULL != c->channels)
1382 GNUNET_CONTAINER_multihashmap32_iterate (c->channels,
1383 &channel_destroy_iterator,
1385 GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap32_size (c->channels));
1386 GNUNET_CONTAINER_multihashmap32_destroy (c->channels);
1388 if (NULL != c->ports)
1390 GNUNET_CONTAINER_multihashmap_iterate (c->ports,
1391 &client_release_ports,
1393 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
1395 GNUNET_CONTAINER_DLL_remove (clients_head,
1398 GNUNET_STATISTICS_update (stats,
1403 if ( (NULL == clients_head) &&
1404 (GNUNET_YES == shutting_down) )
1410 * Setup CADET internals.
1412 * @param cls closure
1413 * @param server the initialized server
1414 * @param c configuration to use
1418 const struct GNUNET_CONFIGURATION_Handle *c,
1419 struct GNUNET_SERVICE_Handle *service)
1423 GNUNET_CONFIGURATION_get_value_number (c,
1428 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1431 "needs to be a number");
1432 ratchet_messages = 64;
1435 GNUNET_CONFIGURATION_get_value_time (c,
1440 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1443 "need delay value");
1444 ratchet_time = GNUNET_TIME_UNIT_HOURS;
1447 GNUNET_CONFIGURATION_get_value_time (c,
1449 "REFRESH_CONNECTION_TIME",
1452 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1454 "REFRESH_CONNECTION_TIME",
1455 "need delay value");
1456 keepalive_period = GNUNET_TIME_UNIT_MINUTES;
1459 GNUNET_CONFIGURATION_get_value_number (c,
1468 LOG (GNUNET_ERROR_TYPE_WARNING, "**************************************\n");
1469 LOG (GNUNET_ERROR_TYPE_WARNING, "Cadet is running with DROP enabled.\n");
1470 LOG (GNUNET_ERROR_TYPE_WARNING, "This is NOT a good idea!\n");
1471 LOG (GNUNET_ERROR_TYPE_WARNING, "Remove DROP_PERCENT from config file.\n");
1472 LOG (GNUNET_ERROR_TYPE_WARNING, "**************************************\n");
1474 my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
1475 if (NULL == my_private_key)
1478 GNUNET_SCHEDULER_shutdown ();
1481 GNUNET_CRYPTO_eddsa_key_get_public (my_private_key,
1482 &my_full_id.public_key);
1483 stats = GNUNET_STATISTICS_create ("cadet",
1485 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
1487 ats_ch = GNUNET_ATS_connectivity_init (c);
1488 /* FIXME: optimize code to allow GNUNET_YES here! */
1489 open_ports = GNUNET_CONTAINER_multihashmap_create (16,
1491 loose_channels = GNUNET_CONTAINER_multihashmap_create (16,
1493 peers = GNUNET_CONTAINER_multipeermap_create (16,
1495 connections = GNUNET_CONTAINER_multishortmap_create (256,
1500 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1501 "CADET started for peer %s\n",
1502 GNUNET_i2s (&my_full_id));
1508 * Define "main" method using service macro.
1512 GNUNET_SERVICE_OPTION_NONE,
1515 &client_disconnect_cb,
1517 GNUNET_MQ_hd_fixed_size (port_open,
1518 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN,
1519 struct GNUNET_CADET_PortMessage,
1521 GNUNET_MQ_hd_fixed_size (port_close,
1522 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE,
1523 struct GNUNET_CADET_PortMessage,
1525 GNUNET_MQ_hd_fixed_size (channel_create,
1526 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE,
1527 struct GNUNET_CADET_LocalChannelCreateMessage,
1529 GNUNET_MQ_hd_fixed_size (channel_destroy,
1530 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY,
1531 struct GNUNET_CADET_LocalChannelDestroyMessage,
1533 GNUNET_MQ_hd_var_size (local_data,
1534 GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
1535 struct GNUNET_CADET_LocalData,
1537 GNUNET_MQ_hd_fixed_size (local_ack,
1538 GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK,
1539 struct GNUNET_CADET_LocalAck,
1541 GNUNET_MQ_hd_fixed_size (get_peers,
1542 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS,
1543 struct GNUNET_MessageHeader,
1545 GNUNET_MQ_hd_fixed_size (show_peer,
1546 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER,
1547 struct GNUNET_CADET_LocalInfo,
1549 GNUNET_MQ_hd_fixed_size (info_tunnels,
1550 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
1551 struct GNUNET_MessageHeader,
1553 GNUNET_MQ_hd_fixed_size (info_tunnel,
1554 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
1555 struct GNUNET_CADET_LocalInfo,
1557 GNUNET_MQ_hd_fixed_size (info_dump,
1558 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP,
1559 struct GNUNET_MessageHeader,
1561 GNUNET_MQ_handler_end ());
1563 /* end of gnunet-service-cadet-new.c */