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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 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;
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 * Shutdown everything once the clients have disconnected.
366 GNUNET_STATISTICS_destroy (stats,
370 if (NULL != open_ports)
372 GNUNET_CONTAINER_multihashmap_destroy (open_ports);
375 if (NULL != loose_channels)
377 GNUNET_CONTAINER_multihashmap_destroy (loose_channels);
378 loose_channels = NULL;
380 /* Destroy tunnels. Note that all channels must be destroyed first! */
381 GCP_iterate_all (&destroy_tunnels_now,
383 /* All tunnels, channels, connections and CORE must be down before this point. */
384 GCP_iterate_all (&destroy_paths_now,
386 /* All paths, tunnels, channels, connections and CORE must be down before this point. */
387 GCP_destroy_all_peers ();
390 GNUNET_CONTAINER_multipeermap_destroy (peers);
393 if (NULL != connections)
395 GNUNET_CONTAINER_multishortmap_destroy (connections);
400 GNUNET_ATS_connectivity_done (ats_ch);
405 GNUNET_free_non_null (my_private_key);
406 my_private_key = NULL;
411 * Task run during shutdown.
416 shutdown_task (void *cls)
418 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
420 shutting_down = GNUNET_YES;
422 if (NULL == clients_head)
428 * We had a remote connection @a value to port @a port before
429 * client @a cls opened port @a port. Bind them now.
431 * @param cls the `struct CadetClient`
432 * @param port the port
433 * @param value the `struct CadetChannel`
434 * @return #GNUNET_YES (iterate over all such channels)
437 bind_loose_channel (void *cls,
438 const struct GNUNET_HashCode *port,
441 struct CadetClient *c = cls;
442 struct CadetChannel *ch = value;
446 GNUNET_assert (GNUNET_YES ==
447 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
455 * Handle port open request. Creates a mapping from the
456 * port to the respective client and checks whether we have
457 * loose channels trying to bind to the port. If so, those
460 * @param cls Identification of the client.
461 * @param pmsg The actual message.
464 handle_port_open (void *cls,
465 const struct GNUNET_CADET_PortMessage *pmsg)
467 struct CadetClient *c = cls;
469 LOG (GNUNET_ERROR_TYPE_DEBUG,
470 "Open port %s requested by %s\n",
471 GNUNET_h2s (&pmsg->port),
473 if (NULL == c->ports)
474 c->ports = GNUNET_CONTAINER_multihashmap_create (4,
477 GNUNET_CONTAINER_multihashmap_put (c->ports,
480 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
483 GNUNET_SERVICE_client_drop (c->client);
486 (void) GNUNET_CONTAINER_multihashmap_put (open_ports,
489 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
490 GNUNET_CONTAINER_multihashmap_get_multiple (loose_channels,
494 GNUNET_SERVICE_client_continue (c->client);
499 * Handler for port close requests. Marks this port as closed
500 * (unless of course we have another client with the same port
501 * open). Note that existing channels accepted on the port are
504 * @param cls Identification of the client.
505 * @param pmsg The actual message.
508 handle_port_close (void *cls,
509 const struct GNUNET_CADET_PortMessage *pmsg)
511 struct CadetClient *c = cls;
513 LOG (GNUNET_ERROR_TYPE_DEBUG,
514 "Closing port %s as requested by %s\n",
515 GNUNET_h2s (&pmsg->port),
518 GNUNET_CONTAINER_multihashmap_remove (c->ports,
523 GNUNET_SERVICE_client_drop (c->client);
526 GNUNET_assert (GNUNET_YES ==
527 GNUNET_CONTAINER_multihashmap_remove (open_ports,
530 GNUNET_SERVICE_client_continue (c->client);
535 * Handler for requests for us creating a new channel to another peer and port.
537 * @param cls Identification of the client.
538 * @param tcm The actual message.
541 handle_channel_create (void *cls,
542 const struct GNUNET_CADET_LocalChannelCreateMessage *tcm)
544 struct CadetClient *c = cls;
545 struct CadetChannel *ch;
547 if (ntohl (tcm->ccn.channel_of_client) < GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
549 /* Channel ID not in allowed range. */
551 GNUNET_SERVICE_client_drop (c->client);
554 ch = lookup_channel (c,
558 /* Channel ID already in use. Not allowed. */
560 GNUNET_SERVICE_client_drop (c->client);
563 LOG (GNUNET_ERROR_TYPE_DEBUG,
564 "New channel to %s at port %s requested by %s\n",
565 GNUNET_i2s (&tcm->peer),
566 GNUNET_h2s (&tcm->port),
570 ch = GCCH_channel_local_new (c,
579 GNUNET_SERVICE_client_drop (c->client);
582 GNUNET_assert (GNUNET_YES ==
583 GNUNET_CONTAINER_multihashmap32_put (c->channels,
584 ntohl (tcm->ccn.channel_of_client),
586 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
588 GNUNET_SERVICE_client_continue (c->client);
593 * Handler for requests of destroying an existing channel.
595 * @param cls client identification of the client
596 * @param msg the actual message
599 handle_channel_destroy (void *cls,
600 const struct GNUNET_CADET_LocalChannelDestroyMessage *msg)
602 struct CadetClient *c = cls;
603 struct CadetChannel *ch;
605 ch = lookup_channel (c,
609 /* Client attempted to destroy unknown channel */
611 GNUNET_SERVICE_client_drop (c->client);
614 LOG (GNUNET_ERROR_TYPE_INFO,
615 "%s is destroying %s\n",
618 GNUNET_assert (GNUNET_YES ==
619 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
620 ntohl (msg->ccn.channel_of_client),
622 GCCH_channel_local_destroy (ch,
624 GNUNET_SERVICE_client_continue (c->client);
629 * Check for client traffic data message is well-formed.
631 * @param cls identification of the client
632 * @param msg the actual message
633 * @return #GNUNET_OK if @a msg is OK, #GNUNET_SYSERR if not
636 check_data (void *cls,
637 const struct GNUNET_CADET_LocalData *msg)
640 size_t payload_claimed_size;
642 struct GNUNET_MessageHeader pa;
644 /* FIXME: what is the format we shall allow for @a msg?
645 ONE payload item or multiple? Seems current cadet_api
646 at least in theory allows more than one. Next-gen
647 cadet_api will likely no more, so we could then
648 simplify this mess again. */
649 /* Sanity check for message size */
650 payload_size = ntohs (msg->header.size) - sizeof (*msg);
651 buf = (const char *) &msg[1];
652 while (payload_size >= sizeof (struct GNUNET_MessageHeader))
654 /* need to memcpy() for alignment */
658 payload_claimed_size = ntohs (pa.size);
659 if ( (payload_size < payload_claimed_size) ||
660 (payload_claimed_size < sizeof (struct GNUNET_MessageHeader)) ||
661 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < payload_claimed_size) )
664 LOG (GNUNET_ERROR_TYPE_DEBUG,
665 "Local data of %u total size had sub-message %u at %u with %u bytes\n",
666 ntohs (msg->header.size),
668 (unsigned int) (buf - (const char *) &msg[1]),
669 (unsigned int) payload_claimed_size);
670 return GNUNET_SYSERR;
672 payload_size -= payload_claimed_size;
673 buf += payload_claimed_size;
675 if (0 != payload_size)
678 return GNUNET_SYSERR;
685 * Handler for client payload traffic to be send on a channel to
688 * @param cls identification of the client
689 * @param msg the actual message
692 handle_data (void *cls,
693 const struct GNUNET_CADET_LocalData *msg)
695 struct CadetClient *c = cls;
696 struct CadetChannel *ch;
700 ch = lookup_channel (c,
704 /* Channel does not exist! */
706 GNUNET_SERVICE_client_drop (c->client);
709 payload_size = ntohs (msg->header.size) - sizeof (*msg);
710 buf = (const char *) &msg[1];
711 LOG (GNUNET_ERROR_TYPE_DEBUG,
712 "Received %u bytes payload from %s for %s\n",
713 (unsigned int) payload_size,
717 GCCH_handle_local_data (ch,
721 GNUNET_SERVICE_client_drop (c->client);
724 GNUNET_SERVICE_client_continue (c->client);
729 * Handler for client's ACKs for payload traffic.
731 * @param cls identification of the client.
732 * @param msg The actual message.
735 handle_ack (void *cls,
736 const struct GNUNET_CADET_LocalAck *msg)
738 struct CadetClient *c = cls;
739 struct CadetChannel *ch;
741 ch = lookup_channel (c,
745 /* Channel does not exist! */
747 GNUNET_SERVICE_client_drop (c->client);
750 LOG (GNUNET_ERROR_TYPE_DEBUG,
751 "Got a local ACK from %s for %s\n",
754 GCCH_handle_local_ack (ch);
755 GNUNET_SERVICE_client_continue (c->client);
760 * Iterator over all peers to send a monitoring client info about each peer.
762 * @param cls Closure ().
763 * @param peer Peer ID (tunnel remote peer).
764 * @param value Peer info.
765 * @return #GNUNET_YES, to keep iterating.
768 get_all_peers_iterator (void *cls,
769 const struct GNUNET_PeerIdentity *peer,
772 struct CadetClient *c = cls;
773 struct CadetPeer *p = value;
774 struct GNUNET_MQ_Envelope *env;
775 struct GNUNET_CADET_LocalInfoPeer *msg;
777 env = GNUNET_MQ_msg (msg,
778 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
779 msg->destination = *peer;
780 msg->paths = htons (GCP_count_paths (p));
781 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
783 GNUNET_MQ_send (c->mq,
790 * Handler for client's INFO PEERS request.
792 * @param cls Identification of the client.
793 * @param message The actual message.
796 handle_get_peers (void *cls,
797 const struct GNUNET_MessageHeader *message)
799 struct CadetClient *c = cls;
800 struct GNUNET_MQ_Envelope *env;
801 struct GNUNET_MessageHeader *reply;
803 GCP_iterate_all (&get_all_peers_iterator,
805 env = GNUNET_MQ_msg (reply,
806 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
807 GNUNET_MQ_send (c->mq,
809 GNUNET_SERVICE_client_continue (c->client);
814 * Iterator over all paths of a peer to build an InfoPeer message.
815 * Message contains blocks of peers, first not included.
817 * @param cls message queue for transmission
818 * @param path Path itself
819 * @param off offset of the peer on @a path
820 * @return #GNUNET_YES if should keep iterating.
821 * #GNUNET_NO otherwise.
824 path_info_iterator (void *cls,
825 struct CadetPeerPath *path,
828 struct GNUNET_MQ_Handle *mq = cls;
829 struct GNUNET_MQ_Envelope *env;
830 struct GNUNET_MessageHeader *resp;
831 struct GNUNET_PeerIdentity *id;
834 unsigned int path_length;
836 path_length = GCPP_get_length (path);
837 path_size = sizeof (struct GNUNET_PeerIdentity) * (path_length - 1);
838 if (sizeof (*resp) + path_size > UINT16_MAX)
840 LOG (GNUNET_ERROR_TYPE_WARNING,
841 "Path of %u entries is too long for info message\n",
845 env = GNUNET_MQ_msg_extra (resp,
847 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
848 id = (struct GNUNET_PeerIdentity *) &resp[1];
850 /* Don't copy first peer. First peer is always the local one. Last
851 * peer is always the destination (leave as 0, EOL).
853 for (i = 0; i < off; i++)
854 id[i] = *GCP_get_id (GCPP_get_peer_at_offset (path,
863 * Handler for client's SHOW_PEER request.
865 * @param cls Identification of the client.
866 * @param msg The actual message.
869 handle_show_peer (void *cls,
870 const struct GNUNET_CADET_LocalInfo *msg)
872 struct CadetClient *c = cls;
874 struct GNUNET_MQ_Envelope *env;
875 struct GNUNET_MessageHeader *resp;
877 p = GCP_get (&msg->peer,
880 GCP_iterate_paths (p,
883 /* Send message with 0/0 to indicate the end */
884 env = GNUNET_MQ_msg (resp,
885 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER_END);
886 GNUNET_MQ_send (c->mq,
888 GNUNET_SERVICE_client_continue (c->client);
893 * Iterator over all tunnels to send a monitoring client info about each tunnel.
895 * @param cls Closure ().
896 * @param peer Peer ID (tunnel remote peer).
897 * @param value a `struct CadetPeer`
898 * @return #GNUNET_YES, to keep iterating.
901 get_all_tunnels_iterator (void *cls,
902 const struct GNUNET_PeerIdentity *peer,
905 struct CadetClient *c = cls;
906 struct CadetPeer *p = value;
907 struct GNUNET_MQ_Envelope *env;
908 struct GNUNET_CADET_LocalInfoTunnel *msg;
909 struct CadetTunnel *t;
911 t = GCP_get_tunnel (p,
915 env = GNUNET_MQ_msg (msg,
916 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
917 msg->destination = *peer;
918 msg->channels = htonl (GCT_count_channels (t));
919 msg->connections = htonl (GCT_count_any_connections (t));
920 msg->cstate = htons (0);
921 msg->estate = htons ((uint16_t) GCT_get_estate (t));
922 GNUNET_MQ_send (c->mq,
929 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS request.
931 * @param cls client Identification of the client.
932 * @param message The actual message.
935 handle_info_tunnels (void *cls,
936 const struct GNUNET_MessageHeader *message)
938 struct CadetClient *c = cls;
939 struct GNUNET_MQ_Envelope *env;
940 struct GNUNET_MessageHeader *reply;
942 GCP_iterate_all (&get_all_tunnels_iterator,
944 env = GNUNET_MQ_msg (reply,
945 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
946 GNUNET_MQ_send (c->mq,
948 GNUNET_SERVICE_client_continue (c->client);
953 * Update the message with information about the connection.
955 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
956 * @param c a connection about which we should store information in @a cls
959 iter_connection (void *cls,
960 struct CadetConnection *c)
962 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
963 struct GNUNET_CADET_ConnectionTunnelIdentifier *h;
965 h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
966 h[msg->connections++] = *(GCC_get_id (c));
971 * Update the message with information about the channel.
973 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
974 * @param ch a channel about which we should store information in @a cls
977 iter_channel (void *cls,
978 struct CadetChannel *ch)
980 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
981 struct GNUNET_CADET_ConnectionTunnelIdentifier *h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
982 struct GNUNET_CADET_ChannelTunnelNumber *chn
983 = (struct GNUNET_CADET_ChannelTunnelNumber *) &h[msg->connections];
985 chn[msg->channels++] = GCCH_get_id (ch);
990 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL request.
992 * @param cls Identification of the client.
993 * @param msg The actual message.
996 handle_info_tunnel (void *cls,
997 const struct GNUNET_CADET_LocalInfo *msg)
999 struct CadetClient *c = cls;
1000 struct GNUNET_MQ_Envelope *env;
1001 struct GNUNET_CADET_LocalInfoTunnel *resp;
1002 struct CadetTunnel *t;
1003 struct CadetPeer *p;
1007 p = GCP_get (&msg->peer,
1009 t = GCP_get_tunnel (p,
1013 /* We don't know the tunnel */
1014 struct GNUNET_MQ_Envelope *env;
1015 struct GNUNET_CADET_LocalInfoTunnel *warn;
1017 LOG (GNUNET_ERROR_TYPE_INFO,
1018 "Tunnel to %s unknown\n",
1019 GNUNET_i2s_full (&msg->peer));
1020 env = GNUNET_MQ_msg (warn,
1021 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1022 warn->destination = msg->peer;
1023 GNUNET_MQ_send (c->mq,
1025 GNUNET_SERVICE_client_continue (c->client);
1029 /* Initialize context */
1030 ch_n = GCT_count_channels (t);
1031 c_n = GCT_count_any_connections (t);
1032 env = GNUNET_MQ_msg_extra (resp,
1033 c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier) +
1034 ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber),
1035 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1036 resp->destination = msg->peer;
1037 /* Do not reorder! #iter_channel needs counters in HBO! */
1038 GCT_iterate_connections (t,
1041 GCT_iterate_channels (t,
1044 resp->connections = htonl (resp->connections);
1045 resp->channels = htonl (resp->channels);
1046 resp->cstate = htons (0);
1047 resp->estate = htons (GCT_get_estate (t));
1048 GNUNET_MQ_send (c->mq,
1050 GNUNET_SERVICE_client_continue (c->client);
1055 * Iterator over all peers to dump info for each peer.
1057 * @param cls Closure (unused).
1058 * @param peer Peer ID (tunnel remote peer).
1059 * @param value Peer info.
1061 * @return #GNUNET_YES, to keep iterating.
1064 show_peer_iterator (void *cls,
1065 const struct GNUNET_PeerIdentity *peer,
1068 struct CadetPeer *p = value;
1069 struct CadetTunnel *t;
1071 t = GCP_get_tunnel (p,
1075 GNUNET_ERROR_TYPE_ERROR);
1076 LOG (GNUNET_ERROR_TYPE_ERROR, "\n");
1082 * Handler for client's INFO_DUMP request.
1084 * @param cls Identification of the client.
1085 * @param message The actual message.
1088 handle_info_dump (void *cls,
1089 const struct GNUNET_MessageHeader *message)
1091 struct CadetClient *c = cls;
1093 LOG (GNUNET_ERROR_TYPE_INFO,
1094 "Received dump info request from client %u\n",
1097 LOG (GNUNET_ERROR_TYPE_ERROR,
1098 "*************************** DUMP START ***************************\n");
1099 for (struct CadetClient *ci = clients_head;
1103 LOG (GNUNET_ERROR_TYPE_ERROR,
1104 "Client %u (%p), handle: %p, ports: %u, channels: %u\n",
1109 ? GNUNET_CONTAINER_multihashmap_size (ci->ports)
1111 GNUNET_CONTAINER_multihashmap32_size (ci->channels));
1113 LOG (GNUNET_ERROR_TYPE_ERROR, "***************************\n");
1114 GCP_iterate_all (&show_peer_iterator,
1117 LOG (GNUNET_ERROR_TYPE_ERROR,
1118 "**************************** DUMP END ****************************\n");
1120 GNUNET_SERVICE_client_continue (c->client);
1126 * Callback called when a client connects to the service.
1128 * @param cls closure for the service
1129 * @param client the new client that connected to the service
1130 * @param mq the message queue used to send messages to the client
1134 client_connect_cb (void *cls,
1135 struct GNUNET_SERVICE_Client *client,
1136 struct GNUNET_MQ_Handle *mq)
1138 struct CadetClient *c;
1140 c = GNUNET_new (struct CadetClient);
1143 c->id = next_client_id++; /* overflow not important: just for debug */
1145 = GNUNET_CONTAINER_multihashmap32_create (32);
1146 GNUNET_CONTAINER_DLL_insert (clients_head,
1149 GNUNET_STATISTICS_update (stats,
1153 LOG (GNUNET_ERROR_TYPE_DEBUG,
1161 * A channel was destroyed by the other peer. Tell our client.
1163 * @param c client that lost a channel
1164 * @param ccn channel identification number for the client
1165 * @param ch the channel object
1168 GSC_handle_remote_channel_destroy (struct CadetClient *c,
1169 struct GNUNET_CADET_ClientChannelNumber ccn,
1170 struct CadetChannel *ch)
1172 struct GNUNET_MQ_Envelope *env;
1173 struct GNUNET_CADET_LocalChannelDestroyMessage *tdm;
1175 env = GNUNET_MQ_msg (tdm,
1176 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY);
1178 GSC_send_to_client (c,
1180 GNUNET_assert (GNUNET_YES ==
1181 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1182 ntohl (ccn.channel_of_client),
1188 * Iterator for deleting each channel whose client endpoint disconnected.
1190 * @param cls Closure (client that has disconnected).
1191 * @param key The local channel id in host byte order
1192 * @param value The value stored at the key (channel to destroy).
1193 * @return #GNUNET_OK, keep iterating.
1196 channel_destroy_iterator (void *cls,
1200 struct CadetClient *c = cls;
1201 struct CadetChannel *ch = value;
1203 LOG (GNUNET_ERROR_TYPE_DEBUG,
1204 "Destroying %s, due to %s disconnecting.\n",
1207 GNUNET_assert (GNUNET_YES ==
1208 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1211 GCCH_channel_local_destroy (ch,
1218 * Remove client's ports from the global hashmap on disconnect.
1220 * @param cls Closure (unused).
1221 * @param key the port.
1222 * @param value the `struct CadetClient` to remove
1223 * @return #GNUNET_OK, keep iterating.
1226 client_release_ports (void *cls,
1227 const struct GNUNET_HashCode *key,
1230 struct CadetClient *c = value;
1232 LOG (GNUNET_ERROR_TYPE_DEBUG,
1233 "Closing port %s due to %s disconnect.\n",
1236 GNUNET_assert (GNUNET_YES ==
1237 GNUNET_CONTAINER_multihashmap_remove (open_ports,
1240 GNUNET_assert (GNUNET_YES ==
1241 GNUNET_CONTAINER_multihashmap_remove (c->ports,
1249 * Callback called when a client disconnected from the service
1251 * @param cls closure for the service
1252 * @param client the client that disconnected
1253 * @param internal_cls should be equal to @a c
1256 client_disconnect_cb (void *cls,
1257 struct GNUNET_SERVICE_Client *client,
1260 struct CadetClient *c = internal_cls;
1262 GNUNET_assert (c->client == client);
1263 LOG (GNUNET_ERROR_TYPE_DEBUG,
1264 "%s is disconnecting.\n",
1266 if (NULL != c->channels)
1268 GNUNET_CONTAINER_multihashmap32_iterate (c->channels,
1269 &channel_destroy_iterator,
1271 GNUNET_CONTAINER_multihashmap32_destroy (c->channels);
1273 if (NULL != c->ports)
1275 GNUNET_CONTAINER_multihashmap_iterate (c->ports,
1276 &client_release_ports,
1278 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
1280 GNUNET_CONTAINER_DLL_remove (clients_head,
1283 GNUNET_STATISTICS_update (stats,
1288 if ( (NULL == clients_head) &&
1289 (GNUNET_YES == shutting_down) )
1295 * Setup CADET internals.
1297 * @param cls closure
1298 * @param server the initialized server
1299 * @param c configuration to use
1303 const struct GNUNET_CONFIGURATION_Handle *c,
1304 struct GNUNET_SERVICE_Handle *service)
1308 GNUNET_CONFIGURATION_get_value_number (c,
1313 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1316 "needs to be a number");
1317 ratchet_messages = 64;
1320 GNUNET_CONFIGURATION_get_value_time (c,
1325 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1328 "need delay value");
1329 ratchet_time = GNUNET_TIME_UNIT_HOURS;
1332 my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
1333 if (NULL == my_private_key)
1336 GNUNET_SCHEDULER_shutdown ();
1339 GNUNET_CRYPTO_eddsa_key_get_public (my_private_key,
1340 &my_full_id.public_key);
1341 stats = GNUNET_STATISTICS_create ("cadet",
1343 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
1345 ats_ch = GNUNET_ATS_connectivity_init (c);
1346 /* FIXME: optimize code to allow GNUNET_YES here! */
1347 open_ports = GNUNET_CONTAINER_multihashmap_create (16,
1349 loose_channels = GNUNET_CONTAINER_multihashmap_create (16,
1351 peers = GNUNET_CONTAINER_multipeermap_create (16,
1353 connections = GNUNET_CONTAINER_multishortmap_create (256,
1358 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1359 "CADET started for peer %s\n",
1360 GNUNET_i2s (&my_full_id));
1366 * Define "main" method using service macro.
1370 GNUNET_SERVICE_OPTION_NONE,
1373 &client_disconnect_cb,
1375 GNUNET_MQ_hd_fixed_size (port_open,
1376 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN,
1377 struct GNUNET_CADET_PortMessage,
1379 GNUNET_MQ_hd_fixed_size (port_close,
1380 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE,
1381 struct GNUNET_CADET_PortMessage,
1383 GNUNET_MQ_hd_fixed_size (channel_create,
1384 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE,
1385 struct GNUNET_CADET_LocalChannelCreateMessage,
1387 GNUNET_MQ_hd_fixed_size (channel_destroy,
1388 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY,
1389 struct GNUNET_CADET_LocalChannelDestroyMessage,
1391 GNUNET_MQ_hd_var_size (data,
1392 GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
1393 struct GNUNET_CADET_LocalData,
1395 GNUNET_MQ_hd_fixed_size (ack,
1396 GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK,
1397 struct GNUNET_CADET_LocalAck,
1399 GNUNET_MQ_hd_fixed_size (get_peers,
1400 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS,
1401 struct GNUNET_MessageHeader,
1403 GNUNET_MQ_hd_fixed_size (show_peer,
1404 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER,
1405 struct GNUNET_CADET_LocalInfo,
1407 GNUNET_MQ_hd_fixed_size (info_tunnels,
1408 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
1409 struct GNUNET_MessageHeader,
1411 GNUNET_MQ_hd_fixed_size (info_tunnel,
1412 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
1413 struct GNUNET_CADET_LocalInfo,
1415 GNUNET_MQ_hd_fixed_size (info_dump,
1416 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP,
1417 struct GNUNET_MessageHeader,
1419 GNUNET_MQ_handler_end ());
1421 /* end of gnunet-service-cadet-new.c */