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22 * @file cadet/gnunet-service-cadet-new.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-new.h"
41 #include "gnunet-service-cadet-new_channel.h"
42 #include "gnunet-service-cadet-new_connection.h"
43 #include "gnunet-service-cadet-new_core.h"
44 #include "gnunet-service-cadet-new_dht.h"
45 #include "gnunet-service-cadet-new_hello.h"
46 #include "gnunet-service-cadet-new_tunnels.h"
47 #include "gnunet-service-cadet-new_peer.h"
48 #include "gnunet-service-cadet-new_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 recover 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;
188 * Send a message to a client.
190 * @param c client to get the message
191 * @param env envelope with the message
194 GSC_send_to_client (struct CadetClient *c,
195 struct GNUNET_MQ_Envelope *env)
197 GNUNET_MQ_send (c->mq,
203 * Return identifier for a client as a string.
205 * @param c client to identify
206 * @return string for debugging
209 GSC_2s (struct CadetClient *c)
213 GNUNET_snprintf (buf,
222 * Lookup channel of client @a c by @a ccn.
224 * @param c client to look in
225 * @param ccn channel ID to look up
226 * @return NULL if no such channel exists
228 static struct CadetChannel *
229 lookup_channel (struct CadetClient *c,
230 struct GNUNET_CADET_ClientChannelNumber ccn)
232 return GNUNET_CONTAINER_multihashmap32_get (c->channels,
233 ntohl (ccn.channel_of_client));
238 * Obtain the next LID to use for incoming connections to
241 * @param c client handle
243 static struct GNUNET_CADET_ClientChannelNumber
244 client_get_next_ccn (struct CadetClient *c)
246 struct GNUNET_CADET_ClientChannelNumber ccn = c->next_ccn;
248 /* increment until we have a free one... */
253 ccn.channel_of_client
254 = htonl (1 + (ntohl (ccn.channel_of_client)));
255 if (ntohl (ccn.channel_of_client) >=
256 GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
257 ccn.channel_of_client = htonl (0);
259 c->next_ccn.channel_of_client
260 = htonl (1 + (ntohl (ccn.channel_of_client)));
266 * Bind incoming channel to this client, and notify client about
267 * incoming connection. Caller is responsible for notifying the other
268 * peer about our acceptance of the channel.
270 * @param c client to bind to
271 * @param ch channel to be bound
272 * @param dest peer that establishes the connection
273 * @param port port number
274 * @param options options
275 * @return local channel number assigned to the new client
277 struct GNUNET_CADET_ClientChannelNumber
278 GSC_bind (struct CadetClient *c,
279 struct CadetChannel *ch,
280 struct CadetPeer *dest,
281 const struct GNUNET_HashCode *port,
284 struct GNUNET_MQ_Envelope *env;
285 struct GNUNET_CADET_LocalChannelCreateMessage *msg;
286 struct GNUNET_CADET_ClientChannelNumber ccn;
288 ccn = client_get_next_ccn (c);
289 GNUNET_assert (GNUNET_YES ==
290 GNUNET_CONTAINER_multihashmap32_put (c->channels,
291 ntohl (ccn.channel_of_client),
293 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
294 LOG (GNUNET_ERROR_TYPE_DEBUG,
295 "Accepting incoming %s from %s on open port %s (%u)\n",
300 /* notify local client about incoming connection! */
301 env = GNUNET_MQ_msg (msg,
302 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE);
305 msg->opt = htonl (options);
306 msg->peer = *GCP_get_id (dest);
307 GSC_send_to_client (c,
314 * Callback invoked on all peers to destroy all tunnels
315 * that may still exist.
318 * @param pid identify of a peer
319 * @param value a `struct CadetPeer` that may still have a tunnel
320 * @return #GNUNET_OK (iterate over all entries)
323 destroy_tunnels_now (void *cls,
324 const struct GNUNET_PeerIdentity *pid,
327 struct CadetPeer *cp = value;
328 struct CadetTunnel *t = GCP_get_tunnel (cp,
332 GCT_destroy_tunnel_now (t);
338 * Callback invoked on all peers to destroy all tunnels
339 * that may still exist.
342 * @param pid identify of a peer
343 * @param value a `struct CadetPeer` that may still have a tunnel
344 * @return #GNUNET_OK (iterate over all entries)
347 destroy_paths_now (void *cls,
348 const struct GNUNET_PeerIdentity *pid,
351 struct CadetPeer *cp = value;
353 GCP_drop_owned_paths (cp);
359 * Task run during shutdown.
364 shutdown_task (void *cls)
366 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
368 shutting_down = GNUNET_YES;
372 GNUNET_STATISTICS_destroy (stats,
376 if (NULL != open_ports)
378 GNUNET_CONTAINER_multihashmap_destroy (open_ports);
381 if (NULL != loose_channels)
383 GNUNET_CONTAINER_multihashmap_destroy (loose_channels);
384 loose_channels = NULL;
386 /* Destroy tunnels. Note that all channels must be destroyed first! */
387 GCP_iterate_all (&destroy_tunnels_now,
389 /* All tunnels, channels, connections and CORE must be down before this point. */
390 GCP_iterate_all (&destroy_paths_now,
392 /* All paths, tunnels, channels, connections and CORE must be down before this point. */
393 GCP_destroy_all_peers ();
396 GNUNET_CONTAINER_multipeermap_destroy (peers);
399 if (NULL != connections)
401 GNUNET_CONTAINER_multishortmap_destroy (connections);
406 GNUNET_ATS_connectivity_done (ats_ch);
411 GNUNET_free_non_null (my_private_key);
412 my_private_key = NULL;
417 * We had a remote connection @a value to port @a port before
418 * client @a cls opened port @a port. Bind them now.
420 * @param cls the `struct CadetClient`
421 * @param port the port
422 * @param value the `struct CadetChannel`
423 * @return #GNUNET_YES (iterate over all such channels)
426 bind_loose_channel (void *cls,
427 const struct GNUNET_HashCode *port,
430 struct CadetClient *c = cls;
431 struct CadetChannel *ch = value;
435 GNUNET_assert (GNUNET_YES ==
436 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
444 * Handle port open request. Creates a mapping from the
445 * port to the respective client and checks whether we have
446 * loose channels trying to bind to the port. If so, those
449 * @param cls Identification of the client.
450 * @param pmsg The actual message.
453 handle_port_open (void *cls,
454 const struct GNUNET_CADET_PortMessage *pmsg)
456 struct CadetClient *c = cls;
458 LOG (GNUNET_ERROR_TYPE_DEBUG,
459 "Open port %s requested by %s\n",
460 GNUNET_h2s (&pmsg->port),
462 if (NULL == c->ports)
463 c->ports = GNUNET_CONTAINER_multihashmap_create (4,
466 GNUNET_CONTAINER_multihashmap_put (c->ports,
469 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
472 GNUNET_SERVICE_client_drop (c->client);
475 (void) GNUNET_CONTAINER_multihashmap_put (open_ports,
478 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
479 GNUNET_CONTAINER_multihashmap_get_multiple (loose_channels,
483 GNUNET_SERVICE_client_continue (c->client);
488 * Handler for port close requests. Marks this port as closed
489 * (unless of course we have another client with the same port
490 * open). Note that existing channels accepted on the port are
493 * @param cls Identification of the client.
494 * @param pmsg The actual message.
497 handle_port_close (void *cls,
498 const struct GNUNET_CADET_PortMessage *pmsg)
500 struct CadetClient *c = cls;
502 LOG (GNUNET_ERROR_TYPE_DEBUG,
503 "Closing port %s as requested by %s\n",
504 GNUNET_h2s (&pmsg->port),
507 GNUNET_CONTAINER_multihashmap_remove (c->ports,
512 GNUNET_SERVICE_client_drop (c->client);
515 GNUNET_assert (GNUNET_YES ==
516 GNUNET_CONTAINER_multihashmap_remove (open_ports,
519 GNUNET_SERVICE_client_continue (c->client);
524 * Handler for requests for us creating a new channel to another peer and port.
526 * @param cls Identification of the client.
527 * @param tcm The actual message.
530 handle_channel_create (void *cls,
531 const struct GNUNET_CADET_LocalChannelCreateMessage *tcm)
533 struct CadetClient *c = cls;
534 struct CadetChannel *ch;
536 if (ntohl (tcm->ccn.channel_of_client) < GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
538 /* Channel ID not in allowed range. */
540 GNUNET_SERVICE_client_drop (c->client);
543 ch = lookup_channel (c,
547 /* Channel ID already in use. Not allowed. */
549 GNUNET_SERVICE_client_drop (c->client);
552 LOG (GNUNET_ERROR_TYPE_DEBUG,
553 "New channel to %s at port %s requested by %s\n",
554 GNUNET_i2s (&tcm->peer),
555 GNUNET_h2s (&tcm->port),
559 ch = GCCH_channel_local_new (c,
568 GNUNET_SERVICE_client_drop (c->client);
571 GNUNET_assert (GNUNET_YES ==
572 GNUNET_CONTAINER_multihashmap32_put (c->channels,
573 ntohl (tcm->ccn.channel_of_client),
575 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
577 GNUNET_SERVICE_client_continue (c->client);
582 * Handler for requests of destroying an existing channel.
584 * @param cls client identification of the client
585 * @param msg the actual message
588 handle_channel_destroy (void *cls,
589 const struct GNUNET_CADET_LocalChannelDestroyMessage *msg)
591 struct CadetClient *c = cls;
592 struct CadetChannel *ch;
594 ch = lookup_channel (c,
598 /* Client attempted to destroy unknown channel */
600 GNUNET_SERVICE_client_drop (c->client);
603 LOG (GNUNET_ERROR_TYPE_INFO,
604 "%s is destroying %s\n",
607 GNUNET_assert (GNUNET_YES ==
608 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
609 ntohl (msg->ccn.channel_of_client),
611 GCCH_channel_local_destroy (ch);
612 GNUNET_SERVICE_client_continue (c->client);
617 * Check for client traffic data message is well-formed.
619 * @param cls identification of the client
620 * @param msg the actual message
621 * @return #GNUNET_OK if @a msg is OK, #GNUNET_SYSERR if not
624 check_data (void *cls,
625 const struct GNUNET_CADET_LocalData *msg)
628 size_t payload_claimed_size;
630 struct GNUNET_MessageHeader pa;
632 /* Sanity check for message size */
633 payload_size = ntohs (msg->header.size) - sizeof (*msg);
634 if ( (payload_size < sizeof (struct GNUNET_MessageHeader)) ||
635 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < payload_size) )
638 return GNUNET_SYSERR;
640 buf = (const char *) &msg[1];
642 /* need to memcpy() for alignment */
646 payload_claimed_size = ntohs (pa.size);
647 if ( (payload_size < payload_claimed_size) ||
648 (0 == payload_claimed_size) )
651 return GNUNET_SYSERR;
653 payload_size -= payload_claimed_size;
654 buf += payload_claimed_size;
655 } while (payload_size >= sizeof (struct GNUNET_MessageHeader));
656 if (0 != payload_size)
659 return GNUNET_SYSERR;
666 * Handler for client payload traffic to be send on a channel to
669 * @param cls identification of the client
670 * @param msg the actual message
673 handle_data (void *cls,
674 const struct GNUNET_CADET_LocalData *msg)
676 struct CadetClient *c = cls;
677 struct CadetChannel *ch;
681 ch = lookup_channel (c,
685 /* Channel does not exist! */
687 GNUNET_SERVICE_client_drop (c->client);
690 payload_size = ntohs (msg->header.size) - sizeof (*msg);
691 buf = (const char *) &msg[1];
692 LOG (GNUNET_ERROR_TYPE_DEBUG,
693 "Received %u bytes payload from %s for %s\n",
694 (unsigned int) payload_size,
698 GCCH_handle_local_data (ch,
702 GNUNET_SERVICE_client_drop (c->client);
705 GNUNET_SERVICE_client_continue (c->client);
710 * Handler for client's ACKs for payload traffic.
712 * @param cls identification of the client.
713 * @param msg The actual message.
716 handle_ack (void *cls,
717 const struct GNUNET_CADET_LocalAck *msg)
719 struct CadetClient *c = cls;
720 struct CadetChannel *ch;
722 ch = lookup_channel (c,
726 /* Channel does not exist! */
728 GNUNET_SERVICE_client_drop (c->client);
731 LOG (GNUNET_ERROR_TYPE_DEBUG,
732 "Got a local ACK from %s for %s\n",
735 GCCH_handle_local_ack (ch);
736 GNUNET_SERVICE_client_continue (c->client);
741 * Iterator over all peers to send a monitoring client info about each peer.
743 * @param cls Closure ().
744 * @param peer Peer ID (tunnel remote peer).
745 * @param value Peer info.
746 * @return #GNUNET_YES, to keep iterating.
749 get_all_peers_iterator (void *cls,
750 const struct GNUNET_PeerIdentity *peer,
753 struct CadetClient *c = cls;
754 struct CadetPeer *p = value;
755 struct GNUNET_MQ_Envelope *env;
756 struct GNUNET_CADET_LocalInfoPeer *msg;
758 env = GNUNET_MQ_msg (msg,
759 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
760 msg->destination = *peer;
761 msg->paths = htons (GCP_count_paths (p));
762 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
764 GNUNET_MQ_send (c->mq,
771 * Handler for client's INFO PEERS request.
773 * @param cls Identification of the client.
774 * @param message The actual message.
777 handle_get_peers (void *cls,
778 const struct GNUNET_MessageHeader *message)
780 struct CadetClient *c = cls;
781 struct GNUNET_MQ_Envelope *env;
782 struct GNUNET_MessageHeader *reply;
784 GCP_iterate_all (&get_all_peers_iterator,
786 env = GNUNET_MQ_msg (reply,
787 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
788 GNUNET_MQ_send (c->mq,
790 GNUNET_SERVICE_client_continue (c->client);
795 * Iterator over all paths of a peer to build an InfoPeer message.
796 * Message contains blocks of peers, first not included.
798 * @param cls message queue for transmission
799 * @param path Path itself
800 * @param off offset of the peer on @a path
801 * @return #GNUNET_YES if should keep iterating.
802 * #GNUNET_NO otherwise.
805 path_info_iterator (void *cls,
806 struct CadetPeerPath *path,
809 struct GNUNET_MQ_Handle *mq = cls;
810 struct GNUNET_MQ_Envelope *env;
811 struct GNUNET_MessageHeader *resp;
812 struct GNUNET_PeerIdentity *id;
815 unsigned int path_length;
817 path_length = GCPP_get_length (path);
818 path_size = sizeof (struct GNUNET_PeerIdentity) * (path_length - 1);
819 if (sizeof (*resp) + path_size > UINT16_MAX)
821 LOG (GNUNET_ERROR_TYPE_WARNING,
822 "Path of %u entries is too long for info message\n",
826 env = GNUNET_MQ_msg_extra (resp,
828 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
829 id = (struct GNUNET_PeerIdentity *) &resp[1];
831 /* Don't copy first peer. First peer is always the local one. Last
832 * peer is always the destination (leave as 0, EOL).
834 for (i = 0; i < off; i++)
835 id[i] = *GCP_get_id (GCPP_get_peer_at_offset (path,
844 * Handler for client's SHOW_PEER request.
846 * @param cls Identification of the client.
847 * @param msg The actual message.
850 handle_show_peer (void *cls,
851 const struct GNUNET_CADET_LocalInfo *msg)
853 struct CadetClient *c = cls;
855 struct GNUNET_MQ_Envelope *env;
856 struct GNUNET_MessageHeader *resp;
858 p = GCP_get (&msg->peer,
861 GCP_iterate_paths (p,
864 /* Send message with 0/0 to indicate the end */
865 env = GNUNET_MQ_msg (resp,
866 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER_END);
867 GNUNET_MQ_send (c->mq,
869 GNUNET_SERVICE_client_continue (c->client);
874 * Iterator over all tunnels to send a monitoring client info about each tunnel.
876 * @param cls Closure ().
877 * @param peer Peer ID (tunnel remote peer).
878 * @param value a `struct CadetPeer`
879 * @return #GNUNET_YES, to keep iterating.
882 get_all_tunnels_iterator (void *cls,
883 const struct GNUNET_PeerIdentity *peer,
886 struct CadetClient *c = cls;
887 struct CadetPeer *p = value;
888 struct GNUNET_MQ_Envelope *env;
889 struct GNUNET_CADET_LocalInfoTunnel *msg;
890 struct CadetTunnel *t;
892 t = GCP_get_tunnel (p,
896 env = GNUNET_MQ_msg (msg,
897 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
898 msg->destination = *peer;
899 msg->channels = htonl (GCT_count_channels (t));
900 msg->connections = htonl (GCT_count_any_connections (t));
901 msg->cstate = htons (0);
902 msg->estate = htons ((uint16_t) GCT_get_estate (t));
903 GNUNET_MQ_send (c->mq,
910 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS request.
912 * @param cls client Identification of the client.
913 * @param message The actual message.
916 handle_info_tunnels (void *cls,
917 const struct GNUNET_MessageHeader *message)
919 struct CadetClient *c = cls;
920 struct GNUNET_MQ_Envelope *env;
921 struct GNUNET_MessageHeader *reply;
923 GCP_iterate_all (&get_all_tunnels_iterator,
925 env = GNUNET_MQ_msg (reply,
926 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
927 GNUNET_MQ_send (c->mq,
929 GNUNET_SERVICE_client_continue (c->client);
934 * Update the message with information about the connection.
936 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
937 * @param c a connection about which we should store information in @a cls
940 iter_connection (void *cls,
941 struct CadetConnection *c)
943 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
944 struct GNUNET_CADET_ConnectionTunnelIdentifier *h;
946 h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
947 h[msg->connections++] = *(GCC_get_id (c));
952 * Update the message with information about the channel.
954 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
955 * @param ch a channel about which we should store information in @a cls
958 iter_channel (void *cls,
959 struct CadetChannel *ch)
961 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
962 struct GNUNET_CADET_ConnectionTunnelIdentifier *h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
963 struct GNUNET_CADET_ChannelTunnelNumber *chn
964 = (struct GNUNET_CADET_ChannelTunnelNumber *) &h[msg->connections];
966 chn[msg->channels++] = GCCH_get_id (ch);
971 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL request.
973 * @param cls Identification of the client.
974 * @param msg The actual message.
977 handle_info_tunnel (void *cls,
978 const struct GNUNET_CADET_LocalInfo *msg)
980 struct CadetClient *c = cls;
981 struct GNUNET_MQ_Envelope *env;
982 struct GNUNET_CADET_LocalInfoTunnel *resp;
983 struct CadetTunnel *t;
988 p = GCP_get (&msg->peer,
990 t = GCP_get_tunnel (p,
994 /* We don't know the tunnel */
995 struct GNUNET_MQ_Envelope *env;
996 struct GNUNET_CADET_LocalInfoTunnel *warn;
998 LOG (GNUNET_ERROR_TYPE_INFO,
999 "Tunnel to %s unknown\n",
1000 GNUNET_i2s_full (&msg->peer));
1001 env = GNUNET_MQ_msg (warn,
1002 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1003 warn->destination = msg->peer;
1004 GNUNET_MQ_send (c->mq,
1006 GNUNET_SERVICE_client_continue (c->client);
1010 /* Initialize context */
1011 ch_n = GCT_count_channels (t);
1012 c_n = GCT_count_any_connections (t);
1013 env = GNUNET_MQ_msg_extra (resp,
1014 c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier) +
1015 ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber),
1016 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1017 resp->destination = msg->peer;
1018 /* Do not reorder! #iter_channel needs counters in HBO! */
1019 GCT_iterate_connections (t,
1022 GCT_iterate_channels (t,
1025 resp->connections = htonl (resp->connections);
1026 resp->channels = htonl (resp->channels);
1027 resp->cstate = htons (0);
1028 resp->estate = htons (GCT_get_estate (t));
1029 GNUNET_MQ_send (c->mq,
1031 GNUNET_SERVICE_client_continue (c->client);
1036 * Iterator over all peers to dump info for each peer.
1038 * @param cls Closure (unused).
1039 * @param peer Peer ID (tunnel remote peer).
1040 * @param value Peer info.
1042 * @return #GNUNET_YES, to keep iterating.
1045 show_peer_iterator (void *cls,
1046 const struct GNUNET_PeerIdentity *peer,
1049 struct CadetPeer *p = value;
1050 struct CadetTunnel *t;
1052 t = GCP_get_tunnel (p,
1056 GNUNET_ERROR_TYPE_ERROR);
1057 LOG (GNUNET_ERROR_TYPE_ERROR, "\n");
1063 * Handler for client's INFO_DUMP request.
1065 * @param cls Identification of the client.
1066 * @param message The actual message.
1069 handle_info_dump (void *cls,
1070 const struct GNUNET_MessageHeader *message)
1072 struct CadetClient *c = cls;
1074 LOG (GNUNET_ERROR_TYPE_INFO,
1075 "Received dump info request from client %u\n",
1078 LOG (GNUNET_ERROR_TYPE_ERROR,
1079 "*************************** DUMP START ***************************\n");
1080 for (struct CadetClient *ci = clients_head;
1084 LOG (GNUNET_ERROR_TYPE_ERROR,
1085 "Client %u (%p), handle: %p, ports: %u, channels: %u\n",
1090 ? GNUNET_CONTAINER_multihashmap_size (ci->ports)
1092 GNUNET_CONTAINER_multihashmap32_size (ci->channels));
1094 LOG (GNUNET_ERROR_TYPE_ERROR, "***************************\n");
1095 GCP_iterate_all (&show_peer_iterator,
1098 LOG (GNUNET_ERROR_TYPE_ERROR,
1099 "**************************** DUMP END ****************************\n");
1101 GNUNET_SERVICE_client_continue (c->client);
1107 * Callback called when a client connects to the service.
1109 * @param cls closure for the service
1110 * @param client the new client that connected to the service
1111 * @param mq the message queue used to send messages to the client
1115 client_connect_cb (void *cls,
1116 struct GNUNET_SERVICE_Client *client,
1117 struct GNUNET_MQ_Handle *mq)
1119 struct CadetClient *c;
1121 c = GNUNET_new (struct CadetClient);
1124 c->id = next_client_id++; /* overflow not important: just for debug */
1126 = GNUNET_CONTAINER_multihashmap32_create (32);
1127 GNUNET_CONTAINER_DLL_insert (clients_head,
1130 GNUNET_STATISTICS_update (stats,
1134 LOG (GNUNET_ERROR_TYPE_DEBUG,
1142 * A channel was destroyed by the other peer. Tell our client.
1144 * @param c client that lost a channel
1145 * @param ccn channel identification number for the client
1146 * @param ch the channel object
1149 GSC_handle_remote_channel_destroy (struct CadetClient *c,
1150 struct GNUNET_CADET_ClientChannelNumber ccn,
1151 struct CadetChannel *ch)
1153 struct GNUNET_MQ_Envelope *env;
1154 struct GNUNET_CADET_LocalChannelDestroyMessage *tdm;
1156 env = GNUNET_MQ_msg (tdm,
1157 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY);
1159 GSC_send_to_client (c,
1161 GNUNET_assert (GNUNET_YES ==
1162 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1163 ntohl (ccn.channel_of_client),
1169 * Iterator for deleting each channel whose client endpoint disconnected.
1171 * @param cls Closure (client that has disconnected).
1172 * @param key The local channel id in host byte order
1173 * @param value The value stored at the key (channel to destroy).
1174 * @return #GNUNET_OK, keep iterating.
1177 channel_destroy_iterator (void *cls,
1181 struct CadetClient *c = cls;
1182 struct CadetChannel *ch = value;
1184 LOG (GNUNET_ERROR_TYPE_DEBUG,
1185 "Destroying %s, due to %s disconnecting.\n",
1188 GNUNET_assert (GNUNET_YES ==
1189 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1192 if (key < GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
1193 GCCH_channel_local_destroy (ch);
1195 GCCH_channel_incoming_destroy (ch);
1201 * Remove client's ports from the global hashmap on disconnect.
1203 * @param cls Closure (unused).
1204 * @param key the port.
1205 * @param value the `struct CadetClient` to remove
1206 * @return #GNUNET_OK, keep iterating.
1209 client_release_ports (void *cls,
1210 const struct GNUNET_HashCode *key,
1213 struct CadetClient *c = value;
1215 LOG (GNUNET_ERROR_TYPE_DEBUG,
1216 "Closing port %s due to %s disconnect.\n",
1219 GNUNET_assert (GNUNET_YES ==
1220 GNUNET_CONTAINER_multihashmap_remove (open_ports,
1223 GNUNET_assert (GNUNET_YES ==
1224 GNUNET_CONTAINER_multihashmap_remove (c->ports,
1232 * Callback called when a client disconnected from the service
1234 * @param cls closure for the service
1235 * @param client the client that disconnected
1236 * @param internal_cls should be equal to @a c
1239 client_disconnect_cb (void *cls,
1240 struct GNUNET_SERVICE_Client *client,
1243 struct CadetClient *c = internal_cls;
1245 GNUNET_assert (c->client == client);
1246 LOG (GNUNET_ERROR_TYPE_DEBUG,
1247 "%s is disconnecting.\n",
1249 if (NULL != c->channels)
1251 GNUNET_CONTAINER_multihashmap32_iterate (c->channels,
1252 &channel_destroy_iterator,
1254 GNUNET_CONTAINER_multihashmap32_destroy (c->channels);
1256 if (NULL != c->ports)
1258 GNUNET_CONTAINER_multihashmap_iterate (c->ports,
1259 &client_release_ports,
1261 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
1263 GNUNET_CONTAINER_DLL_remove (clients_head,
1266 GNUNET_STATISTICS_update (stats,
1275 * Setup CADET internals.
1277 * @param cls closure
1278 * @param server the initialized server
1279 * @param c configuration to use
1283 const struct GNUNET_CONFIGURATION_Handle *c,
1284 struct GNUNET_SERVICE_Handle *service)
1288 GNUNET_CONFIGURATION_get_value_number (c,
1293 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1296 "needs to be a number");
1297 ratchet_messages = 64;
1300 GNUNET_CONFIGURATION_get_value_time (c,
1305 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1308 "need delay value");
1309 ratchet_time = GNUNET_TIME_UNIT_HOURS;
1312 my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
1313 if (NULL == my_private_key)
1316 GNUNET_SCHEDULER_shutdown ();
1319 GNUNET_CRYPTO_eddsa_key_get_public (my_private_key,
1320 &my_full_id.public_key);
1321 stats = GNUNET_STATISTICS_create ("cadet",
1323 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
1325 ats_ch = GNUNET_ATS_connectivity_init (c);
1326 /* FIXME: optimize code to allow GNUNET_YES here! */
1327 open_ports = GNUNET_CONTAINER_multihashmap_create (16,
1329 loose_channels = GNUNET_CONTAINER_multihashmap_create (16,
1331 peers = GNUNET_CONTAINER_multipeermap_create (16,
1333 connections = GNUNET_CONTAINER_multishortmap_create (256,
1338 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1339 "CADET started for peer %s\n",
1340 GNUNET_i2s (&my_full_id));
1346 * Define "main" method using service macro.
1350 GNUNET_SERVICE_OPTION_NONE,
1353 &client_disconnect_cb,
1355 GNUNET_MQ_hd_fixed_size (port_open,
1356 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN,
1357 struct GNUNET_CADET_PortMessage,
1359 GNUNET_MQ_hd_fixed_size (port_close,
1360 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE,
1361 struct GNUNET_CADET_PortMessage,
1363 GNUNET_MQ_hd_fixed_size (channel_create,
1364 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE,
1365 struct GNUNET_CADET_LocalChannelCreateMessage,
1367 GNUNET_MQ_hd_fixed_size (channel_destroy,
1368 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY,
1369 struct GNUNET_CADET_LocalChannelDestroyMessage,
1371 GNUNET_MQ_hd_var_size (data,
1372 GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
1373 struct GNUNET_CADET_LocalData,
1375 GNUNET_MQ_hd_fixed_size (ack,
1376 GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK,
1377 struct GNUNET_CADET_LocalAck,
1379 GNUNET_MQ_hd_fixed_size (get_peers,
1380 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS,
1381 struct GNUNET_MessageHeader,
1383 GNUNET_MQ_hd_fixed_size (show_peer,
1384 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER,
1385 struct GNUNET_CADET_LocalInfo,
1387 GNUNET_MQ_hd_fixed_size (info_tunnels,
1388 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
1389 struct GNUNET_MessageHeader,
1391 GNUNET_MQ_hd_fixed_size (info_tunnel,
1392 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
1393 struct GNUNET_CADET_LocalInfo,
1395 GNUNET_MQ_hd_fixed_size (info_dump,
1396 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP,
1397 struct GNUNET_MessageHeader,
1399 GNUNET_MQ_handler_end ());
1401 /* end of gnunet-service-cadet-new.c */