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3 Copyright (C) 2001-2013, 2017 GNUnet e.V.
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
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18 SPDX-License-Identifier: AGPL3.0-or-later
22 * @file cadet/gnunet-service-cadet.c
23 * @brief GNUnet CADET service with encryption
24 * @author Bartlomiej Polot
25 * @author Christian Grothoff
28 * - peer: other cadet instance. If there is direct connection it's a neighbor.
29 * - path: series of directly connected peer from one peer to another.
30 * - connection: path which is being used in a tunnel.
31 * - tunnel: encrypted connection to a peer, neighbor or not.
32 * - channel: logical link between two clients, on the same or different peers.
33 * have properties like reliability.
37 #include "gnunet_util_lib.h"
39 #include "gnunet_statistics_service.h"
40 #include "gnunet-service-cadet.h"
41 #include "gnunet-service-cadet_channel.h"
42 #include "gnunet-service-cadet_connection.h"
43 #include "gnunet-service-cadet_core.h"
44 #include "gnunet-service-cadet_dht.h"
45 #include "gnunet-service-cadet_hello.h"
46 #include "gnunet-service-cadet_tunnels.h"
47 #include "gnunet-service-cadet_peer.h"
48 #include "gnunet-service-cadet_paths.h"
50 #define LOG(level, ...) GNUNET_log (level,__VA_ARGS__)
54 * Struct containing information about a client of the service
61 struct CadetClient *next;
66 struct CadetClient *prev;
69 * Tunnels that belong to this client, indexed by local id,
70 * value is a `struct CadetChannel`.
72 struct GNUNET_CONTAINER_MultiHashMap32 *channels;
75 * Handle to communicate with the client
77 struct GNUNET_MQ_Handle *mq;
82 struct GNUNET_SERVICE_Client *client;
85 * Ports that this client has declared interest in.
86 * Indexed by port, contains `struct OpenPort`
88 struct GNUNET_CONTAINER_MultiHashMap *ports;
91 * Channel ID to use for the next incoming channel for this client.
92 * Wraps around (in theory).
94 struct GNUNET_CADET_ClientChannelNumber next_ccn;
97 * ID of the client, mainly for debug messages. Purely internal to this file.
103 /******************************************************************************/
104 /*********************** GLOBAL VARIABLES ****************************/
105 /******************************************************************************/
107 /****************************** Global variables ******************************/
110 * Handle to our configuration.
112 const struct GNUNET_CONFIGURATION_Handle *cfg;
115 * Handle to the statistics service.
117 struct GNUNET_STATISTICS_Handle *stats;
120 * Handle to communicate with ATS.
122 struct GNUNET_ATS_ConnectivityHandle *ats_ch;
127 struct GNUNET_PeerIdentity my_full_id;
132 struct GNUNET_CRYPTO_EddsaPrivateKey *my_private_key;
135 * Signal that shutdown is happening: prevent recovery measures.
140 * DLL with all the clients, head.
142 static struct CadetClient *clients_head;
145 * DLL with all the clients, tail.
147 static struct CadetClient *clients_tail;
150 * Next ID to assign to a client.
152 static unsigned int next_client_id;
155 * All ports clients of this peer have opened. Maps from
156 * a hashed port to a `struct OpenPort`.
158 struct GNUNET_CONTAINER_MultiHashMap *open_ports;
161 * Map from ports to channels where the ports were closed at the
162 * time we got the inbound connection.
163 * Indexed by h_port, contains `struct CadetChannel`.
165 struct GNUNET_CONTAINER_MultiHashMap *loose_channels;
168 * Map from PIDs to `struct CadetPeer` entries.
170 struct GNUNET_CONTAINER_MultiPeerMap *peers;
173 * Map from `struct GNUNET_CADET_ConnectionTunnelIdentifier`
174 * hash codes to `struct CadetConnection` objects.
176 struct GNUNET_CONTAINER_MultiShortmap *connections;
179 * How many messages are needed to trigger an AXOLOTL ratchet advance.
181 unsigned long long ratchet_messages;
184 * How long until we trigger a ratched advance due to time.
186 struct GNUNET_TIME_Relative ratchet_time;
189 * How frequently do we send KEEPALIVE messages on idle connections?
191 struct GNUNET_TIME_Relative keepalive_period;
194 * Set to non-zero values to create random drops to test retransmissions.
196 unsigned long long drop_percent;
200 * Send a message to a client.
202 * @param c client to get the message
203 * @param env envelope with the message
206 GSC_send_to_client (struct CadetClient *c,
207 struct GNUNET_MQ_Envelope *env)
209 GNUNET_MQ_send (c->mq,
215 * Return identifier for a client as a string.
217 * @param c client to identify
218 * @return string for debugging
221 GSC_2s (struct CadetClient *c)
225 GNUNET_snprintf (buf,
234 * Lookup channel of client @a c by @a ccn.
236 * @param c client to look in
237 * @param ccn channel ID to look up
238 * @return NULL if no such channel exists
240 static struct CadetChannel *
241 lookup_channel (struct CadetClient *c,
242 struct GNUNET_CADET_ClientChannelNumber ccn)
244 return GNUNET_CONTAINER_multihashmap32_get (c->channels,
245 ntohl (ccn.channel_of_client));
250 * Obtain the next LID to use for incoming connections to
253 * @param c client handle
255 static struct GNUNET_CADET_ClientChannelNumber
256 client_get_next_ccn (struct CadetClient *c)
258 struct GNUNET_CADET_ClientChannelNumber ccn = c->next_ccn;
260 /* increment until we have a free one... */
265 ccn.channel_of_client
266 = htonl (1 + (ntohl (ccn.channel_of_client)));
267 if (ntohl (ccn.channel_of_client) >=
268 GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
269 ccn.channel_of_client = htonl (0);
271 c->next_ccn.channel_of_client
272 = htonl (1 + (ntohl (ccn.channel_of_client)));
278 * Bind incoming channel to this client, and notify client about
279 * incoming connection. Caller is responsible for notifying the other
280 * peer about our acceptance of the channel.
282 * @param c client to bind to
283 * @param ch channel to be bound
284 * @param dest peer that establishes the connection
285 * @param port port number
286 * @param options options
287 * @return local channel number assigned to the new client
289 struct GNUNET_CADET_ClientChannelNumber
290 GSC_bind (struct CadetClient *c,
291 struct CadetChannel *ch,
292 struct CadetPeer *dest,
293 const struct GNUNET_HashCode *port,
296 struct GNUNET_MQ_Envelope *env;
297 struct GNUNET_CADET_LocalChannelCreateMessage *cm;
298 struct GNUNET_CADET_ClientChannelNumber ccn;
300 ccn = client_get_next_ccn (c);
301 GNUNET_assert (GNUNET_YES ==
302 GNUNET_CONTAINER_multihashmap32_put (c->channels,
303 ntohl (ccn.channel_of_client),
305 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
306 LOG (GNUNET_ERROR_TYPE_DEBUG,
307 "Accepting incoming %s from %s on open port %s (%u), assigning ccn %X\n",
311 (uint32_t) ntohl (options),
312 (uint32_t) ntohl (ccn.channel_of_client));
313 /* notify local client about incoming connection! */
314 env = GNUNET_MQ_msg (cm,
315 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE);
318 cm->opt = htonl (options);
319 cm->peer = *GCP_get_id (dest);
320 GSC_send_to_client (c,
327 * Callback invoked on all peers to destroy all tunnels
328 * that may still exist.
331 * @param pid identify of a peer
332 * @param value a `struct CadetPeer` that may still have a tunnel
333 * @return #GNUNET_OK (iterate over all entries)
336 destroy_tunnels_now (void *cls,
337 const struct GNUNET_PeerIdentity *pid,
340 struct CadetPeer *cp = value;
341 struct CadetTunnel *t = GCP_get_tunnel (cp,
345 GCT_destroy_tunnel_now (t);
351 * Callback invoked on all peers to destroy all tunnels
352 * that may still exist.
355 * @param pid identify of a peer
356 * @param value a `struct CadetPeer` that may still have a tunnel
357 * @return #GNUNET_OK (iterate over all entries)
360 destroy_paths_now (void *cls,
361 const struct GNUNET_PeerIdentity *pid,
364 struct CadetPeer *cp = value;
366 GCP_drop_owned_paths (cp);
372 * Shutdown everything once the clients have disconnected.
379 GNUNET_STATISTICS_destroy (stats,
383 if (NULL != open_ports)
385 GNUNET_CONTAINER_multihashmap_destroy (open_ports);
388 if (NULL != loose_channels)
390 GNUNET_CONTAINER_multihashmap_destroy (loose_channels);
391 loose_channels = NULL;
393 /* Destroy tunnels. Note that all channels must be destroyed first! */
394 GCP_iterate_all (&destroy_tunnels_now,
396 /* All tunnels, channels, connections and CORE must be down before this point. */
397 GCP_iterate_all (&destroy_paths_now,
399 /* All paths, tunnels, channels, connections and CORE must be down before this point. */
400 GCP_destroy_all_peers ();
403 GNUNET_CONTAINER_multipeermap_destroy (peers);
406 if (NULL != connections)
408 GNUNET_CONTAINER_multishortmap_destroy (connections);
413 GNUNET_ATS_connectivity_done (ats_ch);
418 GNUNET_free_non_null (my_private_key);
419 my_private_key = NULL;
424 * Task run during shutdown.
429 shutdown_task (void *cls)
431 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
433 shutting_down = GNUNET_YES;
435 if (NULL == clients_head)
441 * We had a remote connection @a value to port @a h_port before
442 * client @a cls opened port @a port. Bind them now.
444 * @param cls the `struct CadetClient`
445 * @param h_port the hashed port
446 * @param value the `struct CadetChannel`
447 * @return #GNUNET_YES (iterate over all such channels)
450 bind_loose_channel (void *cls,
451 const struct GNUNET_HashCode *port,
454 struct OpenPort *op = cls;
455 struct CadetChannel *ch = value;
460 GNUNET_assert (GNUNET_YES ==
461 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
469 * Handle port open request. Creates a mapping from the
470 * port to the respective client and checks whether we have
471 * loose channels trying to bind to the port. If so, those
474 * @param cls Identification of the client.
475 * @param pmsg The actual message.
478 handle_port_open (void *cls,
479 const struct GNUNET_CADET_PortMessage *pmsg)
481 struct CadetClient *c = cls;
484 LOG (GNUNET_ERROR_TYPE_DEBUG,
485 "Open port %s requested by %s\n",
486 GNUNET_h2s (&pmsg->port),
488 if (NULL == c->ports)
489 c->ports = GNUNET_CONTAINER_multihashmap_create (4,
491 op = GNUNET_new (struct OpenPort);
493 op->port = pmsg->port;
494 GCCH_hash_port (&op->h_port,
498 GNUNET_CONTAINER_multihashmap_put (c->ports,
501 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
504 GNUNET_SERVICE_client_drop (c->client);
507 (void) GNUNET_CONTAINER_multihashmap_put (open_ports,
510 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
511 GNUNET_CONTAINER_multihashmap_get_multiple (loose_channels,
515 GNUNET_SERVICE_client_continue (c->client);
520 * Handler for port close requests. Marks this port as closed
521 * (unless of course we have another client with the same port
522 * open). Note that existing channels accepted on the port are
525 * @param cls Identification of the client.
526 * @param pmsg The actual message.
529 handle_port_close (void *cls,
530 const struct GNUNET_CADET_PortMessage *pmsg)
532 struct CadetClient *c = cls;
535 LOG (GNUNET_ERROR_TYPE_DEBUG,
536 "Closing port %s as requested by %s\n",
537 GNUNET_h2s (&pmsg->port),
539 if (NULL == c->ports)
541 /* Client closed a port despite _never_ having opened one? */
543 GNUNET_SERVICE_client_drop (c->client);
546 op = GNUNET_CONTAINER_multihashmap_get (c->ports,
551 GNUNET_SERVICE_client_drop (c->client);
554 GNUNET_assert (GNUNET_YES ==
555 GNUNET_CONTAINER_multihashmap_remove (c->ports,
558 GNUNET_assert (GNUNET_YES ==
559 GNUNET_CONTAINER_multihashmap_remove (open_ports,
563 GNUNET_SERVICE_client_continue (c->client);
568 * Handler for requests for us creating a new channel to another peer and port.
570 * @param cls Identification of the client.
571 * @param tcm The actual message.
574 handle_channel_create (void *cls,
575 const struct GNUNET_CADET_LocalChannelCreateMessage *tcm)
577 struct CadetClient *c = cls;
578 struct CadetChannel *ch;
580 if (ntohl (tcm->ccn.channel_of_client) < GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
582 /* Channel ID not in allowed range. */
584 GNUNET_SERVICE_client_drop (c->client);
587 ch = lookup_channel (c,
591 /* Channel ID already in use. Not allowed. */
593 GNUNET_SERVICE_client_drop (c->client);
596 LOG (GNUNET_ERROR_TYPE_DEBUG,
597 "New channel to %s at port %s requested by %s\n",
598 GNUNET_i2s (&tcm->peer),
599 GNUNET_h2s (&tcm->port),
603 ch = GCCH_channel_local_new (c,
612 GNUNET_SERVICE_client_drop (c->client);
615 GNUNET_assert (GNUNET_YES ==
616 GNUNET_CONTAINER_multihashmap32_put (c->channels,
617 ntohl (tcm->ccn.channel_of_client),
619 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
621 GNUNET_SERVICE_client_continue (c->client);
626 * Handler for requests of destroying an existing channel.
628 * @param cls client identification of the client
629 * @param msg the actual message
632 handle_channel_destroy (void *cls,
633 const struct GNUNET_CADET_LocalChannelDestroyMessage *msg)
635 struct CadetClient *c = cls;
636 struct CadetChannel *ch;
638 ch = lookup_channel (c,
642 /* Client attempted to destroy unknown channel.
643 Can happen if the other side went down at the same time.*/
644 LOG (GNUNET_ERROR_TYPE_DEBUG,
645 "%s tried to destroy unknown channel %X\n",
647 (uint32_t) ntohl (msg->ccn.channel_of_client));
648 GNUNET_SERVICE_client_continue (c->client);
651 LOG (GNUNET_ERROR_TYPE_DEBUG,
652 "%s is destroying %s\n",
655 GNUNET_assert (GNUNET_YES ==
656 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
657 ntohl (msg->ccn.channel_of_client),
659 GCCH_channel_local_destroy (ch,
662 GNUNET_SERVICE_client_continue (c->client);
667 * Check for client traffic data message is well-formed.
669 * @param cls identification of the client
670 * @param msg the actual message
671 * @return #GNUNET_OK if @a msg is OK, #GNUNET_SYSERR if not
674 check_local_data (void *cls,
675 const struct GNUNET_CADET_LocalData *msg)
678 size_t payload_claimed_size;
680 struct GNUNET_MessageHeader pa;
682 /* FIXME: what is the format we shall allow for @a msg?
683 ONE payload item or multiple? Seems current cadet_api
684 at least in theory allows more than one. Next-gen
685 cadet_api will likely no more, so we could then
686 simplify this mess again. */
687 /* Sanity check for message size */
688 payload_size = ntohs (msg->header.size) - sizeof (*msg);
689 buf = (const char *) &msg[1];
690 while (payload_size >= sizeof (struct GNUNET_MessageHeader))
692 /* need to memcpy() for alignment */
696 payload_claimed_size = ntohs (pa.size);
697 if ( (payload_size < payload_claimed_size) ||
698 (payload_claimed_size < sizeof (struct GNUNET_MessageHeader)) ||
699 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < payload_claimed_size) )
702 LOG (GNUNET_ERROR_TYPE_DEBUG,
703 "Local data of %u total size had sub-message %u at %u with %u bytes\n",
704 ntohs (msg->header.size),
706 (unsigned int) (buf - (const char *) &msg[1]),
707 (unsigned int) payload_claimed_size);
708 return GNUNET_SYSERR;
710 payload_size -= payload_claimed_size;
711 buf += payload_claimed_size;
713 if (0 != payload_size)
716 return GNUNET_SYSERR;
723 * Handler for client payload traffic to be send on a channel to
726 * @param cls identification of the client
727 * @param msg the actual message
730 handle_local_data (void *cls,
731 const struct GNUNET_CADET_LocalData *msg)
733 struct CadetClient *c = cls;
734 struct CadetChannel *ch;
738 ch = lookup_channel (c,
742 /* Channel does not exist (anymore) */
743 LOG (GNUNET_ERROR_TYPE_WARNING,
744 "Dropping payload for channel %u from client (channel unknown, other endpoint may have disconnected)\n",
745 (unsigned int) ntohl (msg->ccn.channel_of_client));
746 GNUNET_SERVICE_client_continue (c->client);
749 payload_size = ntohs (msg->header.size) - sizeof (*msg);
750 GNUNET_STATISTICS_update (stats,
751 "# payload received from clients",
754 buf = (const char *) &msg[1];
755 LOG (GNUNET_ERROR_TYPE_DEBUG,
756 "Received %u bytes payload from %s for %s\n",
757 (unsigned int) payload_size,
761 GCCH_handle_local_data (ch,
767 GNUNET_SERVICE_client_drop (c->client);
770 GNUNET_SERVICE_client_continue (c->client);
775 * Handler for client's ACKs for payload traffic.
777 * @param cls identification of the client.
778 * @param msg The actual message.
781 handle_local_ack (void *cls,
782 const struct GNUNET_CADET_LocalAck *msg)
784 struct CadetClient *c = cls;
785 struct CadetChannel *ch;
787 ch = lookup_channel (c,
791 /* Channel does not exist (anymore) */
792 LOG (GNUNET_ERROR_TYPE_WARNING,
793 "Ignoring local ACK for channel %u from client (channel unknown, other endpoint may have disconnected)\n",
794 (unsigned int) ntohl (msg->ccn.channel_of_client));
795 GNUNET_SERVICE_client_continue (c->client);
798 LOG (GNUNET_ERROR_TYPE_DEBUG,
799 "Got a local ACK from %s for %s\n",
802 GCCH_handle_local_ack (ch,
804 GNUNET_SERVICE_client_continue (c->client);
809 * Iterator over all peers to send a monitoring client info about each peer.
811 * @param cls Closure ().
812 * @param peer Peer ID (tunnel remote peer).
813 * @param value Peer info.
814 * @return #GNUNET_YES, to keep iterating.
817 get_all_peers_iterator (void *cls,
818 const struct GNUNET_PeerIdentity *peer,
821 struct CadetClient *c = cls;
822 struct CadetPeer *p = value;
823 struct GNUNET_MQ_Envelope *env;
824 struct GNUNET_CADET_LocalInfoPeer *msg;
826 env = GNUNET_MQ_msg (msg,
827 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
828 msg->destination = *peer;
829 msg->paths = htons (GCP_count_paths (p));
830 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
832 GNUNET_MQ_send (c->mq,
839 * Handler for client's INFO PEERS request.
841 * @param cls Identification of the client.
842 * @param message The actual message.
845 handle_get_peers (void *cls,
846 const struct GNUNET_MessageHeader *message)
848 struct CadetClient *c = cls;
849 struct GNUNET_MQ_Envelope *env;
850 struct GNUNET_MessageHeader *reply;
852 GCP_iterate_all (&get_all_peers_iterator,
854 env = GNUNET_MQ_msg (reply,
855 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
856 GNUNET_MQ_send (c->mq,
858 GNUNET_SERVICE_client_continue (c->client);
863 * Iterator over all paths of a peer to build an InfoPeer message.
864 * Message contains blocks of peers, first not included.
866 * @param cls message queue for transmission
867 * @param path Path itself
868 * @param off offset of the peer on @a path
869 * @return #GNUNET_YES if should keep iterating.
870 * #GNUNET_NO otherwise.
873 path_info_iterator (void *cls,
874 struct CadetPeerPath *path,
877 struct GNUNET_MQ_Handle *mq = cls;
878 struct GNUNET_MQ_Envelope *env;
879 struct GNUNET_CADET_LocalInfoPeer *resp;
880 struct GNUNET_PeerIdentity *id;
883 unsigned int path_length;
885 path_length = GCPP_get_length (path);
886 path_size = sizeof (struct GNUNET_PeerIdentity) * path_length;
887 if (sizeof (*resp) + path_size > UINT16_MAX)
889 LOG (GNUNET_ERROR_TYPE_WARNING,
890 "Path of %u entries is too long for info message\n",
894 env = GNUNET_MQ_msg_extra (resp,
896 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
899 resp->offset = htons(off);
900 resp->finished_with_paths = htons(0);
902 id = (struct GNUNET_PeerIdentity *) &resp[1];
904 /* Don't copy first peer. First peer is always the local one. Last
905 * peer is always the destination (leave as 0, EOL).
907 for (i = 0; i <= off; i++)
908 id[i] = *GCP_get_id (GCPP_get_peer_at_offset (path,
916 * Getting summary information about the number of paths and if a tunnel exists,
917 * and the indirect paths to a peer, if there are ones.
919 * @param cls Closure ().
920 * @param peer Peer ID (tunnel remote peer).
921 * @param value Peer info.
922 * @return #GNUNET_YES, to keep iterating.
925 get_peer_info (void *cls,
926 const struct GNUNET_PeerIdentity *peer,
929 struct CadetClient *c = cls;
930 struct GNUNET_MQ_Envelope *env;
931 struct GNUNET_CADET_LocalInfoPeer *msg;
933 env = GNUNET_MQ_msg (msg,
934 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
935 msg->offset = htons(0);
936 msg->destination = *peer;
937 msg->paths = htons (GCP_count_paths (p));
938 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
940 msg->finished_with_paths = htons(0);
941 GNUNET_MQ_send (c->mq,
943 GCP_iterate_indirect_paths (p,
950 * Handler for client's SHOW_PEER request.
952 * @param cls Identification of the client.
953 * @param msg The actual message.
956 handle_show_peer (void *cls,
957 const struct GNUNET_CADET_LocalInfo *msg)
959 struct CadetClient *c = cls;
961 struct GNUNET_MQ_Envelope *env;
962 struct GNUNET_CADET_LocalInfoPeer *resp;
964 p = GCP_get (&msg->peer,
967 get_peer_info(c, &(msg->peer), p);
971 env = GNUNET_MQ_msg (resp,
972 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
973 resp->finished_with_paths = htons(1);
974 resp->destination = msg->peer;
976 GNUNET_MQ_send (c->mq,
979 GNUNET_SERVICE_client_continue (c->client);
984 * Iterator over all tunnels to send a monitoring client info about each tunnel.
986 * @param cls Closure ().
987 * @param peer Peer ID (tunnel remote peer).
988 * @param value a `struct CadetPeer`
989 * @return #GNUNET_YES, to keep iterating.
992 get_all_tunnels_iterator (void *cls,
993 const struct GNUNET_PeerIdentity *peer,
996 struct CadetClient *c = cls;
997 struct CadetPeer *p = value;
998 struct GNUNET_MQ_Envelope *env;
999 struct GNUNET_CADET_LocalInfoTunnel *msg;
1000 struct CadetTunnel *t;
1002 t = GCP_get_tunnel (p,
1006 env = GNUNET_MQ_msg (msg,
1007 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
1008 msg->destination = *peer;
1009 msg->channels = htonl (GCT_count_channels (t));
1010 msg->connections = htonl (GCT_count_any_connections (t));
1011 msg->cstate = htons (0);
1012 msg->estate = htons ((uint16_t) GCT_get_estate (t));
1013 GNUNET_MQ_send (c->mq,
1020 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS request.
1022 * @param cls client Identification of the client.
1023 * @param message The actual message.
1026 handle_info_tunnels (void *cls,
1027 const struct GNUNET_MessageHeader *message)
1029 struct CadetClient *c = cls;
1030 struct GNUNET_MQ_Envelope *env;
1031 struct GNUNET_MessageHeader *reply;
1033 GCP_iterate_all (&get_all_tunnels_iterator,
1035 env = GNUNET_MQ_msg (reply,
1036 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
1037 GNUNET_MQ_send (c->mq,
1039 GNUNET_SERVICE_client_continue (c->client);
1044 * Update the message with information about the connection.
1046 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
1047 * @param ct a connection about which we should store information in @a cls
1050 iter_connection (void *cls,
1051 struct CadetTConnection *ct)
1053 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
1054 struct CadetConnection *cc = ct->cc;
1055 struct GNUNET_CADET_ConnectionTunnelIdentifier *h;
1057 h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
1058 h[msg->connections++] = *(GCC_get_id (cc));
1063 * Update the message with information about the channel.
1065 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
1066 * @param ch a channel about which we should store information in @a cls
1069 iter_channel (void *cls,
1070 struct CadetChannel *ch)
1072 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
1073 struct GNUNET_CADET_ConnectionTunnelIdentifier *h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
1074 struct GNUNET_CADET_ChannelTunnelNumber *chn
1075 = (struct GNUNET_CADET_ChannelTunnelNumber *) &h[msg->connections];
1077 chn[msg->channels++] = GCCH_get_id (ch);
1082 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL request.
1084 * @param cls Identification of the client.
1085 * @param msg The actual message.
1088 handle_info_tunnel (void *cls,
1089 const struct GNUNET_CADET_LocalInfo *msg)
1091 struct CadetClient *c = cls;
1092 struct GNUNET_MQ_Envelope *env;
1093 struct GNUNET_CADET_LocalInfoTunnel *resp;
1094 struct CadetTunnel *t;
1095 struct CadetPeer *p;
1099 p = GCP_get (&msg->peer,
1101 t = GCP_get_tunnel (p,
1105 /* We don't know the tunnel */
1106 struct GNUNET_MQ_Envelope *env;
1107 struct GNUNET_CADET_LocalInfoTunnel *warn;
1109 LOG (GNUNET_ERROR_TYPE_INFO,
1110 "Tunnel to %s unknown\n",
1111 GNUNET_i2s_full (&msg->peer));
1112 env = GNUNET_MQ_msg (warn,
1113 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1114 warn->destination = msg->peer;
1115 GNUNET_MQ_send (c->mq,
1117 GNUNET_SERVICE_client_continue (c->client);
1121 /* Initialize context */
1122 ch_n = GCT_count_channels (t);
1123 c_n = GCT_count_any_connections (t);
1124 env = GNUNET_MQ_msg_extra (resp,
1125 c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier) +
1126 ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber),
1127 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1128 resp->destination = msg->peer;
1129 /* Do not reorder! #iter_channel needs counters in HBO! */
1130 GCT_iterate_connections (t,
1133 GCT_iterate_channels (t,
1136 resp->connections = htonl (resp->connections);
1137 resp->channels = htonl (resp->channels);
1138 resp->cstate = htons (0);
1139 resp->estate = htons (GCT_get_estate (t));
1140 GNUNET_MQ_send (c->mq,
1142 GNUNET_SERVICE_client_continue (c->client);
1147 * Iterator over all peers to dump info for each peer.
1149 * @param cls Closure (unused).
1150 * @param peer Peer ID (tunnel remote peer).
1151 * @param value Peer info.
1153 * @return #GNUNET_YES, to keep iterating.
1156 show_peer_iterator (void *cls,
1157 const struct GNUNET_PeerIdentity *peer,
1160 struct CadetPeer *p = value;
1161 struct CadetTunnel *t;
1163 t = GCP_get_tunnel (p,
1167 GNUNET_ERROR_TYPE_ERROR);
1168 LOG (GNUNET_ERROR_TYPE_ERROR, "\n");
1174 * Handler for client's INFO_DUMP request.
1176 * @param cls Identification of the client.
1177 * @param message The actual message.
1180 handle_info_dump (void *cls,
1181 const struct GNUNET_MessageHeader *message)
1183 struct CadetClient *c = cls;
1185 LOG (GNUNET_ERROR_TYPE_INFO,
1186 "Received dump info request from client %u\n",
1189 LOG (GNUNET_ERROR_TYPE_ERROR,
1190 "*************************** DUMP START ***************************\n");
1191 for (struct CadetClient *ci = clients_head;
1195 LOG (GNUNET_ERROR_TYPE_ERROR,
1196 "Client %u (%p), handle: %p, ports: %u, channels: %u\n",
1201 ? GNUNET_CONTAINER_multihashmap_size (ci->ports)
1203 GNUNET_CONTAINER_multihashmap32_size (ci->channels));
1205 LOG (GNUNET_ERROR_TYPE_ERROR, "***************************\n");
1206 GCP_iterate_all (&show_peer_iterator,
1209 LOG (GNUNET_ERROR_TYPE_ERROR,
1210 "**************************** DUMP END ****************************\n");
1212 GNUNET_SERVICE_client_continue (c->client);
1218 * Callback called when a client connects to the service.
1220 * @param cls closure for the service
1221 * @param client the new client that connected to the service
1222 * @param mq the message queue used to send messages to the client
1226 client_connect_cb (void *cls,
1227 struct GNUNET_SERVICE_Client *client,
1228 struct GNUNET_MQ_Handle *mq)
1230 struct CadetClient *c;
1232 c = GNUNET_new (struct CadetClient);
1235 c->id = next_client_id++; /* overflow not important: just for debug */
1237 = GNUNET_CONTAINER_multihashmap32_create (32);
1238 GNUNET_CONTAINER_DLL_insert (clients_head,
1241 GNUNET_STATISTICS_update (stats,
1245 LOG (GNUNET_ERROR_TYPE_DEBUG,
1253 * A channel was destroyed by the other peer. Tell our client.
1255 * @param c client that lost a channel
1256 * @param ccn channel identification number for the client
1257 * @param ch the channel object
1260 GSC_handle_remote_channel_destroy (struct CadetClient *c,
1261 struct GNUNET_CADET_ClientChannelNumber ccn,
1262 struct CadetChannel *ch)
1264 struct GNUNET_MQ_Envelope *env;
1265 struct GNUNET_CADET_LocalChannelDestroyMessage *tdm;
1267 env = GNUNET_MQ_msg (tdm,
1268 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY);
1270 GSC_send_to_client (c,
1272 GNUNET_assert (GNUNET_YES ==
1273 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1274 ntohl (ccn.channel_of_client),
1280 * A client that created a loose channel that was not bound to a port
1281 * disconnected, drop it from the #loose_channels list.
1283 * @param h_port the hashed port the channel was trying to bind to
1284 * @param ch the channel that was lost
1287 GSC_drop_loose_channel (const struct GNUNET_HashCode *h_port,
1288 struct CadetChannel *ch)
1290 GNUNET_assert (GNUNET_YES ==
1291 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
1298 * Iterator for deleting each channel whose client endpoint disconnected.
1300 * @param cls Closure (client that has disconnected).
1301 * @param key The local channel id in host byte order
1302 * @param value The value stored at the key (channel to destroy).
1303 * @return #GNUNET_OK, keep iterating.
1306 channel_destroy_iterator (void *cls,
1310 struct CadetClient *c = cls;
1311 struct GNUNET_CADET_ClientChannelNumber ccn;
1312 struct CadetChannel *ch = value;
1314 LOG (GNUNET_ERROR_TYPE_DEBUG,
1315 "Destroying %s, due to %s disconnecting.\n",
1318 ccn.channel_of_client = htonl (key);
1319 GCCH_channel_local_destroy (ch,
1322 GNUNET_assert (GNUNET_YES ==
1323 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1331 * Remove client's ports from the global hashmap on disconnect.
1333 * @param cls the `struct CadetClient`
1334 * @param port the port.
1335 * @param value the `struct OpenPort` to remove
1336 * @return #GNUNET_OK, keep iterating.
1339 client_release_ports (void *cls,
1340 const struct GNUNET_HashCode *port,
1343 struct CadetClient *c = cls;
1344 struct OpenPort *op = value;
1346 GNUNET_assert (c == op->c);
1347 LOG (GNUNET_ERROR_TYPE_DEBUG,
1348 "Closing port %s due to %s disconnect.\n",
1351 GNUNET_assert (GNUNET_YES ==
1352 GNUNET_CONTAINER_multihashmap_remove (open_ports,
1355 GNUNET_assert (GNUNET_YES ==
1356 GNUNET_CONTAINER_multihashmap_remove (c->ports,
1365 * Callback called when a client disconnected from the service
1367 * @param cls closure for the service
1368 * @param client the client that disconnected
1369 * @param internal_cls should be equal to @a c
1372 client_disconnect_cb (void *cls,
1373 struct GNUNET_SERVICE_Client *client,
1376 struct CadetClient *c = internal_cls;
1378 GNUNET_assert (c->client == client);
1379 LOG (GNUNET_ERROR_TYPE_DEBUG,
1380 "%s is disconnecting.\n",
1382 if (NULL != c->channels)
1384 GNUNET_CONTAINER_multihashmap32_iterate (c->channels,
1385 &channel_destroy_iterator,
1387 GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap32_size (c->channels));
1388 GNUNET_CONTAINER_multihashmap32_destroy (c->channels);
1390 if (NULL != c->ports)
1392 GNUNET_CONTAINER_multihashmap_iterate (c->ports,
1393 &client_release_ports,
1395 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
1397 GNUNET_CONTAINER_DLL_remove (clients_head,
1400 GNUNET_STATISTICS_update (stats,
1405 if ( (NULL == clients_head) &&
1406 (GNUNET_YES == shutting_down) )
1412 * Setup CADET internals.
1414 * @param cls closure
1415 * @param server the initialized server
1416 * @param c configuration to use
1420 const struct GNUNET_CONFIGURATION_Handle *c,
1421 struct GNUNET_SERVICE_Handle *service)
1425 GNUNET_CONFIGURATION_get_value_number (c,
1430 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1433 "needs to be a number");
1434 ratchet_messages = 64;
1437 GNUNET_CONFIGURATION_get_value_time (c,
1442 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1445 "need delay value");
1446 ratchet_time = GNUNET_TIME_UNIT_HOURS;
1449 GNUNET_CONFIGURATION_get_value_time (c,
1451 "REFRESH_CONNECTION_TIME",
1454 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1456 "REFRESH_CONNECTION_TIME",
1457 "need delay value");
1458 keepalive_period = GNUNET_TIME_UNIT_MINUTES;
1461 GNUNET_CONFIGURATION_get_value_number (c,
1470 LOG (GNUNET_ERROR_TYPE_WARNING, "**************************************\n");
1471 LOG (GNUNET_ERROR_TYPE_WARNING, "Cadet is running with DROP enabled.\n");
1472 LOG (GNUNET_ERROR_TYPE_WARNING, "This is NOT a good idea!\n");
1473 LOG (GNUNET_ERROR_TYPE_WARNING, "Remove DROP_PERCENT from config file.\n");
1474 LOG (GNUNET_ERROR_TYPE_WARNING, "**************************************\n");
1476 my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
1477 if (NULL == my_private_key)
1480 GNUNET_SCHEDULER_shutdown ();
1483 GNUNET_CRYPTO_eddsa_key_get_public (my_private_key,
1484 &my_full_id.public_key);
1485 stats = GNUNET_STATISTICS_create ("cadet",
1487 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
1489 ats_ch = GNUNET_ATS_connectivity_init (c);
1490 /* FIXME: optimize code to allow GNUNET_YES here! */
1491 open_ports = GNUNET_CONTAINER_multihashmap_create (16,
1493 loose_channels = GNUNET_CONTAINER_multihashmap_create (16,
1495 peers = GNUNET_CONTAINER_multipeermap_create (16,
1497 connections = GNUNET_CONTAINER_multishortmap_create (256,
1502 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1503 "CADET started for peer %s\n",
1504 GNUNET_i2s (&my_full_id));
1510 * Define "main" method using service macro.
1514 GNUNET_SERVICE_OPTION_NONE,
1517 &client_disconnect_cb,
1519 GNUNET_MQ_hd_fixed_size (port_open,
1520 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN,
1521 struct GNUNET_CADET_PortMessage,
1523 GNUNET_MQ_hd_fixed_size (port_close,
1524 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE,
1525 struct GNUNET_CADET_PortMessage,
1527 GNUNET_MQ_hd_fixed_size (channel_create,
1528 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE,
1529 struct GNUNET_CADET_LocalChannelCreateMessage,
1531 GNUNET_MQ_hd_fixed_size (channel_destroy,
1532 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY,
1533 struct GNUNET_CADET_LocalChannelDestroyMessage,
1535 GNUNET_MQ_hd_var_size (local_data,
1536 GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
1537 struct GNUNET_CADET_LocalData,
1539 GNUNET_MQ_hd_fixed_size (local_ack,
1540 GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK,
1541 struct GNUNET_CADET_LocalAck,
1543 GNUNET_MQ_hd_fixed_size (get_peers,
1544 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS,
1545 struct GNUNET_MessageHeader,
1547 GNUNET_MQ_hd_fixed_size (show_peer,
1548 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER,
1549 struct GNUNET_CADET_LocalInfo,
1551 GNUNET_MQ_hd_fixed_size (info_tunnels,
1552 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
1553 struct GNUNET_MessageHeader,
1555 GNUNET_MQ_hd_fixed_size (info_tunnel,
1556 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
1557 struct GNUNET_CADET_LocalInfo,
1559 GNUNET_MQ_hd_fixed_size (info_dump,
1560 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP,
1561 struct GNUNET_MessageHeader,
1563 GNUNET_MQ_handler_end ());
1565 /* end of gnunet-service-cadet-new.c */