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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 *Client.
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.
102 /******************************************************************************/
103 /*********************** GLOBAL VARIABLES ****************************/
104 /******************************************************************************/
106 /****************************** Global variables ******************************/
109 * Handle to our configuration.
111 const struct GNUNET_CONFIGURATION_Handle *cfg;
114 * Handle to the statistics service.
116 struct GNUNET_STATISTICS_Handle *stats;
119 * Handle to communicate with ATS.
121 struct GNUNET_ATS_ConnectivityHandle *ats_ch;
126 struct GNUNET_PeerIdentity my_full_id;
131 struct GNUNET_CRYPTO_EddsaPrivateKey *my_private_key;
134 * Signal that shutdown is happening: prevent recovery measures.
139 * DLL with all the clients, head.
141 static struct CadetClient *clients_head;
144 * DLL with all the clients, tail.
146 static struct CadetClient *clients_tail;
149 * Next ID to assign to a client.
151 static unsigned int next_client_id;
154 * All ports clients of this peer have opened.
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 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 port before
440 * client @a cls opened port @a port. Bind them now.
442 * @param cls the `struct CadetClient`
443 * @param port the 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 CadetClient *c = cls;
453 struct CadetChannel *ch = value;
457 GNUNET_assert (GNUNET_YES ==
458 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
466 * Handle port open request. Creates a mapping from the
467 * port to the respective client and checks whether we have
468 * loose channels trying to bind to the port. If so, those
471 * @param cls Identification of the client.
472 * @param pmsg The actual message.
475 handle_port_open (void *cls,
476 const struct GNUNET_CADET_PortMessage *pmsg)
478 struct CadetClient *c = cls;
480 LOG (GNUNET_ERROR_TYPE_DEBUG,
481 "Open port %s requested by %s\n",
482 GNUNET_h2s (&pmsg->port),
484 if (NULL == c->ports)
485 c->ports = GNUNET_CONTAINER_multihashmap_create (4,
488 GNUNET_CONTAINER_multihashmap_put (c->ports,
491 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
494 GNUNET_SERVICE_client_drop (c->client);
497 (void) GNUNET_CONTAINER_multihashmap_put (open_ports,
500 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
501 GNUNET_CONTAINER_multihashmap_get_multiple (loose_channels,
505 GNUNET_SERVICE_client_continue (c->client);
510 * Handler for port close requests. Marks this port as closed
511 * (unless of course we have another client with the same port
512 * open). Note that existing channels accepted on the port are
515 * @param cls Identification of the client.
516 * @param pmsg The actual message.
519 handle_port_close (void *cls,
520 const struct GNUNET_CADET_PortMessage *pmsg)
522 struct CadetClient *c = cls;
524 LOG (GNUNET_ERROR_TYPE_DEBUG,
525 "Closing port %s as requested by %s\n",
526 GNUNET_h2s (&pmsg->port),
529 GNUNET_CONTAINER_multihashmap_remove (c->ports,
534 GNUNET_SERVICE_client_drop (c->client);
537 GNUNET_assert (GNUNET_YES ==
538 GNUNET_CONTAINER_multihashmap_remove (open_ports,
541 GNUNET_SERVICE_client_continue (c->client);
546 * Handler for requests for us creating a new channel to another peer and port.
548 * @param cls Identification of the client.
549 * @param tcm The actual message.
552 handle_channel_create (void *cls,
553 const struct GNUNET_CADET_LocalChannelCreateMessage *tcm)
555 struct CadetClient *c = cls;
556 struct CadetChannel *ch;
558 if (ntohl (tcm->ccn.channel_of_client) < GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
560 /* Channel ID not in allowed range. */
562 GNUNET_SERVICE_client_drop (c->client);
565 ch = lookup_channel (c,
569 /* Channel ID already in use. Not allowed. */
571 GNUNET_SERVICE_client_drop (c->client);
574 LOG (GNUNET_ERROR_TYPE_DEBUG,
575 "New channel to %s at port %s requested by %s\n",
576 GNUNET_i2s (&tcm->peer),
577 GNUNET_h2s (&tcm->port),
581 ch = GCCH_channel_local_new (c,
590 GNUNET_SERVICE_client_drop (c->client);
593 GNUNET_assert (GNUNET_YES ==
594 GNUNET_CONTAINER_multihashmap32_put (c->channels,
595 ntohl (tcm->ccn.channel_of_client),
597 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
599 GNUNET_SERVICE_client_continue (c->client);
604 * Handler for requests of destroying an existing channel.
606 * @param cls client identification of the client
607 * @param msg the actual message
610 handle_channel_destroy (void *cls,
611 const struct GNUNET_CADET_LocalChannelDestroyMessage *msg)
613 struct CadetClient *c = cls;
614 struct CadetChannel *ch;
616 ch = lookup_channel (c,
620 /* Client attempted to destroy unknown channel.
621 Can happen if the other side went down at the same time.*/
622 LOG (GNUNET_ERROR_TYPE_DEBUG,
623 "%s tried to destroy unknown channel %X\n",
625 (uint32_t) ntohl (msg->ccn.channel_of_client));
628 LOG (GNUNET_ERROR_TYPE_DEBUG,
629 "%s is destroying %s\n",
632 GNUNET_assert (GNUNET_YES ==
633 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
634 ntohl (msg->ccn.channel_of_client),
636 GCCH_channel_local_destroy (ch,
639 GNUNET_SERVICE_client_continue (c->client);
644 * Check for client traffic data message is well-formed.
646 * @param cls identification of the client
647 * @param msg the actual message
648 * @return #GNUNET_OK if @a msg is OK, #GNUNET_SYSERR if not
651 check_local_data (void *cls,
652 const struct GNUNET_CADET_LocalData *msg)
655 size_t payload_claimed_size;
657 struct GNUNET_MessageHeader pa;
659 /* FIXME: what is the format we shall allow for @a msg?
660 ONE payload item or multiple? Seems current cadet_api
661 at least in theory allows more than one. Next-gen
662 cadet_api will likely no more, so we could then
663 simplify this mess again. */
664 /* Sanity check for message size */
665 payload_size = ntohs (msg->header.size) - sizeof (*msg);
666 buf = (const char *) &msg[1];
667 while (payload_size >= sizeof (struct GNUNET_MessageHeader))
669 /* need to memcpy() for alignment */
673 payload_claimed_size = ntohs (pa.size);
674 if ( (payload_size < payload_claimed_size) ||
675 (payload_claimed_size < sizeof (struct GNUNET_MessageHeader)) ||
676 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < payload_claimed_size) )
679 LOG (GNUNET_ERROR_TYPE_DEBUG,
680 "Local data of %u total size had sub-message %u at %u with %u bytes\n",
681 ntohs (msg->header.size),
683 (unsigned int) (buf - (const char *) &msg[1]),
684 (unsigned int) payload_claimed_size);
685 return GNUNET_SYSERR;
687 payload_size -= payload_claimed_size;
688 buf += payload_claimed_size;
690 if (0 != payload_size)
693 return GNUNET_SYSERR;
700 * Handler for client payload traffic to be send on a channel to
703 * @param cls identification of the client
704 * @param msg the actual message
707 handle_local_data (void *cls,
708 const struct GNUNET_CADET_LocalData *msg)
710 struct CadetClient *c = cls;
711 struct CadetChannel *ch;
715 ch = lookup_channel (c,
719 /* Channel does not exist (anymore) */
720 LOG (GNUNET_ERROR_TYPE_WARNING,
721 "Dropping payload for channel %u from client (channel unknown, other endpoint may have disconnected)\n",
722 (unsigned int) ntohl (msg->ccn.channel_of_client));
723 GNUNET_SERVICE_client_continue (c->client);
726 payload_size = ntohs (msg->header.size) - sizeof (*msg);
727 GNUNET_STATISTICS_update (stats,
728 "# payload received from clients",
731 buf = (const char *) &msg[1];
732 LOG (GNUNET_ERROR_TYPE_DEBUG,
733 "Received %u bytes payload from %s for %s\n",
734 (unsigned int) payload_size,
738 GCCH_handle_local_data (ch,
743 GNUNET_SERVICE_client_drop (c->client);
746 GNUNET_SERVICE_client_continue (c->client);
751 * Handler for client's ACKs for payload traffic.
753 * @param cls identification of the client.
754 * @param msg The actual message.
757 handle_local_ack (void *cls,
758 const struct GNUNET_CADET_LocalAck *msg)
760 struct CadetClient *c = cls;
761 struct CadetChannel *ch;
763 ch = lookup_channel (c,
767 /* Channel does not exist (anymore) */
768 LOG (GNUNET_ERROR_TYPE_WARNING,
769 "Ignoring local ACK for channel %u from client (channel unknown, other endpoint may have disconnected)\n",
770 (unsigned int) ntohl (msg->ccn.channel_of_client));
771 GNUNET_SERVICE_client_continue (c->client);
774 LOG (GNUNET_ERROR_TYPE_DEBUG,
775 "Got a local ACK from %s for %s\n",
778 GCCH_handle_local_ack (ch,
780 GNUNET_SERVICE_client_continue (c->client);
785 * Iterator over all peers to send a monitoring client info about each peer.
787 * @param cls Closure ().
788 * @param peer Peer ID (tunnel remote peer).
789 * @param value Peer info.
790 * @return #GNUNET_YES, to keep iterating.
793 get_all_peers_iterator (void *cls,
794 const struct GNUNET_PeerIdentity *peer,
797 struct CadetClient *c = cls;
798 struct CadetPeer *p = value;
799 struct GNUNET_MQ_Envelope *env;
800 struct GNUNET_CADET_LocalInfoPeer *msg;
802 env = GNUNET_MQ_msg (msg,
803 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
804 msg->destination = *peer;
805 msg->paths = htons (GCP_count_paths (p));
806 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
808 GNUNET_MQ_send (c->mq,
815 * Handler for client's INFO PEERS request.
817 * @param cls Identification of the client.
818 * @param message The actual message.
821 handle_get_peers (void *cls,
822 const struct GNUNET_MessageHeader *message)
824 struct CadetClient *c = cls;
825 struct GNUNET_MQ_Envelope *env;
826 struct GNUNET_MessageHeader *reply;
828 GCP_iterate_all (&get_all_peers_iterator,
830 env = GNUNET_MQ_msg (reply,
831 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
832 GNUNET_MQ_send (c->mq,
834 GNUNET_SERVICE_client_continue (c->client);
839 * Iterator over all paths of a peer to build an InfoPeer message.
840 * Message contains blocks of peers, first not included.
842 * @param cls message queue for transmission
843 * @param path Path itself
844 * @param off offset of the peer on @a path
845 * @return #GNUNET_YES if should keep iterating.
846 * #GNUNET_NO otherwise.
849 path_info_iterator (void *cls,
850 struct CadetPeerPath *path,
853 struct GNUNET_MQ_Handle *mq = cls;
854 struct GNUNET_MQ_Envelope *env;
855 struct GNUNET_MessageHeader *resp;
856 struct GNUNET_PeerIdentity *id;
859 unsigned int path_length;
861 path_length = GCPP_get_length (path);
862 path_size = sizeof (struct GNUNET_PeerIdentity) * (path_length - 1);
863 if (sizeof (*resp) + path_size > UINT16_MAX)
865 LOG (GNUNET_ERROR_TYPE_WARNING,
866 "Path of %u entries is too long for info message\n",
870 env = GNUNET_MQ_msg_extra (resp,
872 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
873 id = (struct GNUNET_PeerIdentity *) &resp[1];
875 /* Don't copy first peer. First peer is always the local one. Last
876 * peer is always the destination (leave as 0, EOL).
878 for (i = 0; i < off; i++)
879 id[i] = *GCP_get_id (GCPP_get_peer_at_offset (path,
888 * Handler for client's SHOW_PEER request.
890 * @param cls Identification of the client.
891 * @param msg The actual message.
894 handle_show_peer (void *cls,
895 const struct GNUNET_CADET_LocalInfo *msg)
897 struct CadetClient *c = cls;
899 struct GNUNET_MQ_Envelope *env;
900 struct GNUNET_MessageHeader *resp;
902 p = GCP_get (&msg->peer,
905 GCP_iterate_paths (p,
908 /* Send message with 0/0 to indicate the end */
909 env = GNUNET_MQ_msg (resp,
910 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER_END);
911 GNUNET_MQ_send (c->mq,
913 GNUNET_SERVICE_client_continue (c->client);
918 * Iterator over all tunnels to send a monitoring client info about each tunnel.
920 * @param cls Closure ().
921 * @param peer Peer ID (tunnel remote peer).
922 * @param value a `struct CadetPeer`
923 * @return #GNUNET_YES, to keep iterating.
926 get_all_tunnels_iterator (void *cls,
927 const struct GNUNET_PeerIdentity *peer,
930 struct CadetClient *c = cls;
931 struct CadetPeer *p = value;
932 struct GNUNET_MQ_Envelope *env;
933 struct GNUNET_CADET_LocalInfoTunnel *msg;
934 struct CadetTunnel *t;
936 t = GCP_get_tunnel (p,
940 env = GNUNET_MQ_msg (msg,
941 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
942 msg->destination = *peer;
943 msg->channels = htonl (GCT_count_channels (t));
944 msg->connections = htonl (GCT_count_any_connections (t));
945 msg->cstate = htons (0);
946 msg->estate = htons ((uint16_t) GCT_get_estate (t));
947 GNUNET_MQ_send (c->mq,
954 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS request.
956 * @param cls client Identification of the client.
957 * @param message The actual message.
960 handle_info_tunnels (void *cls,
961 const struct GNUNET_MessageHeader *message)
963 struct CadetClient *c = cls;
964 struct GNUNET_MQ_Envelope *env;
965 struct GNUNET_MessageHeader *reply;
967 GCP_iterate_all (&get_all_tunnels_iterator,
969 env = GNUNET_MQ_msg (reply,
970 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
971 GNUNET_MQ_send (c->mq,
973 GNUNET_SERVICE_client_continue (c->client);
978 * Update the message with information about the connection.
980 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
981 * @param ct a connection about which we should store information in @a cls
984 iter_connection (void *cls,
985 struct CadetTConnection *ct)
987 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
988 struct CadetConnection *cc = ct->cc;
989 struct GNUNET_CADET_ConnectionTunnelIdentifier *h;
991 h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
992 h[msg->connections++] = *(GCC_get_id (cc));
997 * Update the message with information about the channel.
999 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
1000 * @param ch a channel about which we should store information in @a cls
1003 iter_channel (void *cls,
1004 struct CadetChannel *ch)
1006 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
1007 struct GNUNET_CADET_ConnectionTunnelIdentifier *h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
1008 struct GNUNET_CADET_ChannelTunnelNumber *chn
1009 = (struct GNUNET_CADET_ChannelTunnelNumber *) &h[msg->connections];
1011 chn[msg->channels++] = GCCH_get_id (ch);
1016 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL request.
1018 * @param cls Identification of the client.
1019 * @param msg The actual message.
1022 handle_info_tunnel (void *cls,
1023 const struct GNUNET_CADET_LocalInfo *msg)
1025 struct CadetClient *c = cls;
1026 struct GNUNET_MQ_Envelope *env;
1027 struct GNUNET_CADET_LocalInfoTunnel *resp;
1028 struct CadetTunnel *t;
1029 struct CadetPeer *p;
1033 p = GCP_get (&msg->peer,
1035 t = GCP_get_tunnel (p,
1039 /* We don't know the tunnel */
1040 struct GNUNET_MQ_Envelope *env;
1041 struct GNUNET_CADET_LocalInfoTunnel *warn;
1043 LOG (GNUNET_ERROR_TYPE_INFO,
1044 "Tunnel to %s unknown\n",
1045 GNUNET_i2s_full (&msg->peer));
1046 env = GNUNET_MQ_msg (warn,
1047 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1048 warn->destination = msg->peer;
1049 GNUNET_MQ_send (c->mq,
1051 GNUNET_SERVICE_client_continue (c->client);
1055 /* Initialize context */
1056 ch_n = GCT_count_channels (t);
1057 c_n = GCT_count_any_connections (t);
1058 env = GNUNET_MQ_msg_extra (resp,
1059 c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier) +
1060 ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber),
1061 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1062 resp->destination = msg->peer;
1063 /* Do not reorder! #iter_channel needs counters in HBO! */
1064 GCT_iterate_connections (t,
1067 GCT_iterate_channels (t,
1070 resp->connections = htonl (resp->connections);
1071 resp->channels = htonl (resp->channels);
1072 resp->cstate = htons (0);
1073 resp->estate = htons (GCT_get_estate (t));
1074 GNUNET_MQ_send (c->mq,
1076 GNUNET_SERVICE_client_continue (c->client);
1081 * Iterator over all peers to dump info for each peer.
1083 * @param cls Closure (unused).
1084 * @param peer Peer ID (tunnel remote peer).
1085 * @param value Peer info.
1087 * @return #GNUNET_YES, to keep iterating.
1090 show_peer_iterator (void *cls,
1091 const struct GNUNET_PeerIdentity *peer,
1094 struct CadetPeer *p = value;
1095 struct CadetTunnel *t;
1097 t = GCP_get_tunnel (p,
1101 GNUNET_ERROR_TYPE_ERROR);
1102 LOG (GNUNET_ERROR_TYPE_ERROR, "\n");
1108 * Handler for client's INFO_DUMP request.
1110 * @param cls Identification of the client.
1111 * @param message The actual message.
1114 handle_info_dump (void *cls,
1115 const struct GNUNET_MessageHeader *message)
1117 struct CadetClient *c = cls;
1119 LOG (GNUNET_ERROR_TYPE_INFO,
1120 "Received dump info request from client %u\n",
1123 LOG (GNUNET_ERROR_TYPE_ERROR,
1124 "*************************** DUMP START ***************************\n");
1125 for (struct CadetClient *ci = clients_head;
1129 LOG (GNUNET_ERROR_TYPE_ERROR,
1130 "Client %u (%p), handle: %p, ports: %u, channels: %u\n",
1135 ? GNUNET_CONTAINER_multihashmap_size (ci->ports)
1137 GNUNET_CONTAINER_multihashmap32_size (ci->channels));
1139 LOG (GNUNET_ERROR_TYPE_ERROR, "***************************\n");
1140 GCP_iterate_all (&show_peer_iterator,
1143 LOG (GNUNET_ERROR_TYPE_ERROR,
1144 "**************************** DUMP END ****************************\n");
1146 GNUNET_SERVICE_client_continue (c->client);
1152 * Callback called when a client connects to the service.
1154 * @param cls closure for the service
1155 * @param client the new client that connected to the service
1156 * @param mq the message queue used to send messages to the client
1160 client_connect_cb (void *cls,
1161 struct GNUNET_SERVICE_Client *client,
1162 struct GNUNET_MQ_Handle *mq)
1164 struct CadetClient *c;
1166 c = GNUNET_new (struct CadetClient);
1169 c->id = next_client_id++; /* overflow not important: just for debug */
1171 = GNUNET_CONTAINER_multihashmap32_create (32);
1172 GNUNET_CONTAINER_DLL_insert (clients_head,
1175 GNUNET_STATISTICS_update (stats,
1179 LOG (GNUNET_ERROR_TYPE_DEBUG,
1187 * A channel was destroyed by the other peer. Tell our client.
1189 * @param c client that lost a channel
1190 * @param ccn channel identification number for the client
1191 * @param ch the channel object
1194 GSC_handle_remote_channel_destroy (struct CadetClient *c,
1195 struct GNUNET_CADET_ClientChannelNumber ccn,
1196 struct CadetChannel *ch)
1198 struct GNUNET_MQ_Envelope *env;
1199 struct GNUNET_CADET_LocalChannelDestroyMessage *tdm;
1201 env = GNUNET_MQ_msg (tdm,
1202 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY);
1204 GSC_send_to_client (c,
1206 GNUNET_assert (GNUNET_YES ==
1207 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1208 ntohl (ccn.channel_of_client),
1214 * A client that created a loose channel that was not bound to a port
1215 * disconnected, drop it from the #loose_channels list.
1217 * @param port the port the channel was trying to bind to
1218 * @param ch the channel that was lost
1221 GSC_drop_loose_channel (const struct GNUNET_HashCode *port,
1222 struct CadetChannel *ch)
1224 GNUNET_assert (GNUNET_YES ==
1225 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
1232 * Iterator for deleting each channel whose client endpoint disconnected.
1234 * @param cls Closure (client that has disconnected).
1235 * @param key The local channel id in host byte order
1236 * @param value The value stored at the key (channel to destroy).
1237 * @return #GNUNET_OK, keep iterating.
1240 channel_destroy_iterator (void *cls,
1244 struct CadetClient *c = cls;
1245 struct GNUNET_CADET_ClientChannelNumber ccn;
1246 struct CadetChannel *ch = value;
1248 LOG (GNUNET_ERROR_TYPE_DEBUG,
1249 "Destroying %s, due to %s disconnecting.\n",
1252 ccn.channel_of_client = htonl (key);
1253 GCCH_channel_local_destroy (ch,
1256 GNUNET_assert (GNUNET_YES ==
1257 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1265 * Remove client's ports from the global hashmap on disconnect.
1267 * @param cls Closure (unused).
1268 * @param key the port.
1269 * @param value the `struct CadetClient` to remove
1270 * @return #GNUNET_OK, keep iterating.
1273 client_release_ports (void *cls,
1274 const struct GNUNET_HashCode *key,
1277 struct CadetClient *c = value;
1279 LOG (GNUNET_ERROR_TYPE_DEBUG,
1280 "Closing port %s due to %s disconnect.\n",
1283 GNUNET_assert (GNUNET_YES ==
1284 GNUNET_CONTAINER_multihashmap_remove (open_ports,
1287 GNUNET_assert (GNUNET_YES ==
1288 GNUNET_CONTAINER_multihashmap_remove (c->ports,
1296 * Callback called when a client disconnected from the service
1298 * @param cls closure for the service
1299 * @param client the client that disconnected
1300 * @param internal_cls should be equal to @a c
1303 client_disconnect_cb (void *cls,
1304 struct GNUNET_SERVICE_Client *client,
1307 struct CadetClient *c = internal_cls;
1309 GNUNET_assert (c->client == client);
1310 LOG (GNUNET_ERROR_TYPE_DEBUG,
1311 "%s is disconnecting.\n",
1313 if (NULL != c->channels)
1315 GNUNET_CONTAINER_multihashmap32_iterate (c->channels,
1316 &channel_destroy_iterator,
1318 GNUNET_assert (0 == GNUNET_CONTAINER_multihashmap32_size (c->channels));
1319 GNUNET_CONTAINER_multihashmap32_destroy (c->channels);
1321 if (NULL != c->ports)
1323 GNUNET_CONTAINER_multihashmap_iterate (c->ports,
1324 &client_release_ports,
1326 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
1328 GNUNET_CONTAINER_DLL_remove (clients_head,
1331 GNUNET_STATISTICS_update (stats,
1336 if ( (NULL == clients_head) &&
1337 (GNUNET_YES == shutting_down) )
1343 * Setup CADET internals.
1345 * @param cls closure
1346 * @param server the initialized server
1347 * @param c configuration to use
1351 const struct GNUNET_CONFIGURATION_Handle *c,
1352 struct GNUNET_SERVICE_Handle *service)
1356 GNUNET_CONFIGURATION_get_value_number (c,
1361 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1364 "needs to be a number");
1365 ratchet_messages = 64;
1368 GNUNET_CONFIGURATION_get_value_time (c,
1373 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1376 "need delay value");
1377 ratchet_time = GNUNET_TIME_UNIT_HOURS;
1380 GNUNET_CONFIGURATION_get_value_time (c,
1382 "REFRESH_CONNECTION_TIME",
1385 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1387 "REFRESH_CONNECTION_TIME",
1388 "need delay value");
1389 keepalive_period = GNUNET_TIME_UNIT_MINUTES;
1392 GNUNET_CONFIGURATION_get_value_number (c,
1401 LOG (GNUNET_ERROR_TYPE_WARNING, "**************************************\n");
1402 LOG (GNUNET_ERROR_TYPE_WARNING, "Cadet is running with DROP enabled.\n");
1403 LOG (GNUNET_ERROR_TYPE_WARNING, "This is NOT a good idea!\n");
1404 LOG (GNUNET_ERROR_TYPE_WARNING, "Remove DROP_PERCENT from config file.\n");
1405 LOG (GNUNET_ERROR_TYPE_WARNING, "**************************************\n");
1407 my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
1408 if (NULL == my_private_key)
1411 GNUNET_SCHEDULER_shutdown ();
1414 GNUNET_CRYPTO_eddsa_key_get_public (my_private_key,
1415 &my_full_id.public_key);
1416 stats = GNUNET_STATISTICS_create ("cadet",
1418 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
1420 ats_ch = GNUNET_ATS_connectivity_init (c);
1421 /* FIXME: optimize code to allow GNUNET_YES here! */
1422 open_ports = GNUNET_CONTAINER_multihashmap_create (16,
1424 loose_channels = GNUNET_CONTAINER_multihashmap_create (16,
1426 peers = GNUNET_CONTAINER_multipeermap_create (16,
1428 connections = GNUNET_CONTAINER_multishortmap_create (256,
1433 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1434 "CADET started for peer %s\n",
1435 GNUNET_i2s (&my_full_id));
1441 * Define "main" method using service macro.
1445 GNUNET_SERVICE_OPTION_NONE,
1448 &client_disconnect_cb,
1450 GNUNET_MQ_hd_fixed_size (port_open,
1451 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN,
1452 struct GNUNET_CADET_PortMessage,
1454 GNUNET_MQ_hd_fixed_size (port_close,
1455 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE,
1456 struct GNUNET_CADET_PortMessage,
1458 GNUNET_MQ_hd_fixed_size (channel_create,
1459 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE,
1460 struct GNUNET_CADET_LocalChannelCreateMessage,
1462 GNUNET_MQ_hd_fixed_size (channel_destroy,
1463 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY,
1464 struct GNUNET_CADET_LocalChannelDestroyMessage,
1466 GNUNET_MQ_hd_var_size (local_data,
1467 GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
1468 struct GNUNET_CADET_LocalData,
1470 GNUNET_MQ_hd_fixed_size (local_ack,
1471 GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK,
1472 struct GNUNET_CADET_LocalAck,
1474 GNUNET_MQ_hd_fixed_size (get_peers,
1475 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS,
1476 struct GNUNET_MessageHeader,
1478 GNUNET_MQ_hd_fixed_size (show_peer,
1479 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER,
1480 struct GNUNET_CADET_LocalInfo,
1482 GNUNET_MQ_hd_fixed_size (info_tunnels,
1483 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
1484 struct GNUNET_MessageHeader,
1486 GNUNET_MQ_hd_fixed_size (info_tunnel,
1487 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
1488 struct GNUNET_CADET_LocalInfo,
1490 GNUNET_MQ_hd_fixed_size (info_dump,
1491 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP,
1492 struct GNUNET_MessageHeader,
1494 GNUNET_MQ_handler_end ());
1496 /* end of gnunet-service-cadet-new.c */