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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 *cm;
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 (cm,
302 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE);
305 cm->opt = htonl (options);
306 cm->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,
722 GNUNET_SERVICE_client_drop (c->client);
725 GNUNET_SERVICE_client_continue (c->client);
730 * Handler for client's ACKs for payload traffic.
732 * @param cls identification of the client.
733 * @param msg The actual message.
736 handle_ack (void *cls,
737 const struct GNUNET_CADET_LocalAck *msg)
739 struct CadetClient *c = cls;
740 struct CadetChannel *ch;
742 ch = lookup_channel (c,
746 /* Channel does not exist! */
748 GNUNET_SERVICE_client_drop (c->client);
751 LOG (GNUNET_ERROR_TYPE_DEBUG,
752 "Got a local ACK from %s for %s\n",
755 GCCH_handle_local_ack (ch);
756 GNUNET_SERVICE_client_continue (c->client);
761 * Iterator over all peers to send a monitoring client info about each peer.
763 * @param cls Closure ().
764 * @param peer Peer ID (tunnel remote peer).
765 * @param value Peer info.
766 * @return #GNUNET_YES, to keep iterating.
769 get_all_peers_iterator (void *cls,
770 const struct GNUNET_PeerIdentity *peer,
773 struct CadetClient *c = cls;
774 struct CadetPeer *p = value;
775 struct GNUNET_MQ_Envelope *env;
776 struct GNUNET_CADET_LocalInfoPeer *msg;
778 env = GNUNET_MQ_msg (msg,
779 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
780 msg->destination = *peer;
781 msg->paths = htons (GCP_count_paths (p));
782 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
784 GNUNET_MQ_send (c->mq,
791 * Handler for client's INFO PEERS request.
793 * @param cls Identification of the client.
794 * @param message The actual message.
797 handle_get_peers (void *cls,
798 const struct GNUNET_MessageHeader *message)
800 struct CadetClient *c = cls;
801 struct GNUNET_MQ_Envelope *env;
802 struct GNUNET_MessageHeader *reply;
804 GCP_iterate_all (&get_all_peers_iterator,
806 env = GNUNET_MQ_msg (reply,
807 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
808 GNUNET_MQ_send (c->mq,
810 GNUNET_SERVICE_client_continue (c->client);
815 * Iterator over all paths of a peer to build an InfoPeer message.
816 * Message contains blocks of peers, first not included.
818 * @param cls message queue for transmission
819 * @param path Path itself
820 * @param off offset of the peer on @a path
821 * @return #GNUNET_YES if should keep iterating.
822 * #GNUNET_NO otherwise.
825 path_info_iterator (void *cls,
826 struct CadetPeerPath *path,
829 struct GNUNET_MQ_Handle *mq = cls;
830 struct GNUNET_MQ_Envelope *env;
831 struct GNUNET_MessageHeader *resp;
832 struct GNUNET_PeerIdentity *id;
835 unsigned int path_length;
837 path_length = GCPP_get_length (path);
838 path_size = sizeof (struct GNUNET_PeerIdentity) * (path_length - 1);
839 if (sizeof (*resp) + path_size > UINT16_MAX)
841 LOG (GNUNET_ERROR_TYPE_WARNING,
842 "Path of %u entries is too long for info message\n",
846 env = GNUNET_MQ_msg_extra (resp,
848 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
849 id = (struct GNUNET_PeerIdentity *) &resp[1];
851 /* Don't copy first peer. First peer is always the local one. Last
852 * peer is always the destination (leave as 0, EOL).
854 for (i = 0; i < off; i++)
855 id[i] = *GCP_get_id (GCPP_get_peer_at_offset (path,
864 * Handler for client's SHOW_PEER request.
866 * @param cls Identification of the client.
867 * @param msg The actual message.
870 handle_show_peer (void *cls,
871 const struct GNUNET_CADET_LocalInfo *msg)
873 struct CadetClient *c = cls;
875 struct GNUNET_MQ_Envelope *env;
876 struct GNUNET_MessageHeader *resp;
878 p = GCP_get (&msg->peer,
881 GCP_iterate_paths (p,
884 /* Send message with 0/0 to indicate the end */
885 env = GNUNET_MQ_msg (resp,
886 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER_END);
887 GNUNET_MQ_send (c->mq,
889 GNUNET_SERVICE_client_continue (c->client);
894 * Iterator over all tunnels to send a monitoring client info about each tunnel.
896 * @param cls Closure ().
897 * @param peer Peer ID (tunnel remote peer).
898 * @param value a `struct CadetPeer`
899 * @return #GNUNET_YES, to keep iterating.
902 get_all_tunnels_iterator (void *cls,
903 const struct GNUNET_PeerIdentity *peer,
906 struct CadetClient *c = cls;
907 struct CadetPeer *p = value;
908 struct GNUNET_MQ_Envelope *env;
909 struct GNUNET_CADET_LocalInfoTunnel *msg;
910 struct CadetTunnel *t;
912 t = GCP_get_tunnel (p,
916 env = GNUNET_MQ_msg (msg,
917 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
918 msg->destination = *peer;
919 msg->channels = htonl (GCT_count_channels (t));
920 msg->connections = htonl (GCT_count_any_connections (t));
921 msg->cstate = htons (0);
922 msg->estate = htons ((uint16_t) GCT_get_estate (t));
923 GNUNET_MQ_send (c->mq,
930 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS request.
932 * @param cls client Identification of the client.
933 * @param message The actual message.
936 handle_info_tunnels (void *cls,
937 const struct GNUNET_MessageHeader *message)
939 struct CadetClient *c = cls;
940 struct GNUNET_MQ_Envelope *env;
941 struct GNUNET_MessageHeader *reply;
943 GCP_iterate_all (&get_all_tunnels_iterator,
945 env = GNUNET_MQ_msg (reply,
946 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
947 GNUNET_MQ_send (c->mq,
949 GNUNET_SERVICE_client_continue (c->client);
954 * Update the message with information about the connection.
956 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
957 * @param c a connection about which we should store information in @a cls
960 iter_connection (void *cls,
961 struct CadetConnection *c)
963 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
964 struct GNUNET_CADET_ConnectionTunnelIdentifier *h;
966 h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
967 h[msg->connections++] = *(GCC_get_id (c));
972 * Update the message with information about the channel.
974 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
975 * @param ch a channel about which we should store information in @a cls
978 iter_channel (void *cls,
979 struct CadetChannel *ch)
981 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
982 struct GNUNET_CADET_ConnectionTunnelIdentifier *h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
983 struct GNUNET_CADET_ChannelTunnelNumber *chn
984 = (struct GNUNET_CADET_ChannelTunnelNumber *) &h[msg->connections];
986 chn[msg->channels++] = GCCH_get_id (ch);
991 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL request.
993 * @param cls Identification of the client.
994 * @param msg The actual message.
997 handle_info_tunnel (void *cls,
998 const struct GNUNET_CADET_LocalInfo *msg)
1000 struct CadetClient *c = cls;
1001 struct GNUNET_MQ_Envelope *env;
1002 struct GNUNET_CADET_LocalInfoTunnel *resp;
1003 struct CadetTunnel *t;
1004 struct CadetPeer *p;
1008 p = GCP_get (&msg->peer,
1010 t = GCP_get_tunnel (p,
1014 /* We don't know the tunnel */
1015 struct GNUNET_MQ_Envelope *env;
1016 struct GNUNET_CADET_LocalInfoTunnel *warn;
1018 LOG (GNUNET_ERROR_TYPE_INFO,
1019 "Tunnel to %s unknown\n",
1020 GNUNET_i2s_full (&msg->peer));
1021 env = GNUNET_MQ_msg (warn,
1022 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1023 warn->destination = msg->peer;
1024 GNUNET_MQ_send (c->mq,
1026 GNUNET_SERVICE_client_continue (c->client);
1030 /* Initialize context */
1031 ch_n = GCT_count_channels (t);
1032 c_n = GCT_count_any_connections (t);
1033 env = GNUNET_MQ_msg_extra (resp,
1034 c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier) +
1035 ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber),
1036 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
1037 resp->destination = msg->peer;
1038 /* Do not reorder! #iter_channel needs counters in HBO! */
1039 GCT_iterate_connections (t,
1042 GCT_iterate_channels (t,
1045 resp->connections = htonl (resp->connections);
1046 resp->channels = htonl (resp->channels);
1047 resp->cstate = htons (0);
1048 resp->estate = htons (GCT_get_estate (t));
1049 GNUNET_MQ_send (c->mq,
1051 GNUNET_SERVICE_client_continue (c->client);
1056 * Iterator over all peers to dump info for each peer.
1058 * @param cls Closure (unused).
1059 * @param peer Peer ID (tunnel remote peer).
1060 * @param value Peer info.
1062 * @return #GNUNET_YES, to keep iterating.
1065 show_peer_iterator (void *cls,
1066 const struct GNUNET_PeerIdentity *peer,
1069 struct CadetPeer *p = value;
1070 struct CadetTunnel *t;
1072 t = GCP_get_tunnel (p,
1076 GNUNET_ERROR_TYPE_ERROR);
1077 LOG (GNUNET_ERROR_TYPE_ERROR, "\n");
1083 * Handler for client's INFO_DUMP request.
1085 * @param cls Identification of the client.
1086 * @param message The actual message.
1089 handle_info_dump (void *cls,
1090 const struct GNUNET_MessageHeader *message)
1092 struct CadetClient *c = cls;
1094 LOG (GNUNET_ERROR_TYPE_INFO,
1095 "Received dump info request from client %u\n",
1098 LOG (GNUNET_ERROR_TYPE_ERROR,
1099 "*************************** DUMP START ***************************\n");
1100 for (struct CadetClient *ci = clients_head;
1104 LOG (GNUNET_ERROR_TYPE_ERROR,
1105 "Client %u (%p), handle: %p, ports: %u, channels: %u\n",
1110 ? GNUNET_CONTAINER_multihashmap_size (ci->ports)
1112 GNUNET_CONTAINER_multihashmap32_size (ci->channels));
1114 LOG (GNUNET_ERROR_TYPE_ERROR, "***************************\n");
1115 GCP_iterate_all (&show_peer_iterator,
1118 LOG (GNUNET_ERROR_TYPE_ERROR,
1119 "**************************** DUMP END ****************************\n");
1121 GNUNET_SERVICE_client_continue (c->client);
1127 * Callback called when a client connects to the service.
1129 * @param cls closure for the service
1130 * @param client the new client that connected to the service
1131 * @param mq the message queue used to send messages to the client
1135 client_connect_cb (void *cls,
1136 struct GNUNET_SERVICE_Client *client,
1137 struct GNUNET_MQ_Handle *mq)
1139 struct CadetClient *c;
1141 c = GNUNET_new (struct CadetClient);
1144 c->id = next_client_id++; /* overflow not important: just for debug */
1146 = GNUNET_CONTAINER_multihashmap32_create (32);
1147 GNUNET_CONTAINER_DLL_insert (clients_head,
1150 GNUNET_STATISTICS_update (stats,
1154 LOG (GNUNET_ERROR_TYPE_DEBUG,
1162 * A channel was destroyed by the other peer. Tell our client.
1164 * @param c client that lost a channel
1165 * @param ccn channel identification number for the client
1166 * @param ch the channel object
1169 GSC_handle_remote_channel_destroy (struct CadetClient *c,
1170 struct GNUNET_CADET_ClientChannelNumber ccn,
1171 struct CadetChannel *ch)
1173 struct GNUNET_MQ_Envelope *env;
1174 struct GNUNET_CADET_LocalChannelDestroyMessage *tdm;
1176 env = GNUNET_MQ_msg (tdm,
1177 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY);
1179 GSC_send_to_client (c,
1181 GNUNET_assert (GNUNET_YES ==
1182 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1183 ntohl (ccn.channel_of_client),
1189 * Iterator for deleting each channel whose client endpoint disconnected.
1191 * @param cls Closure (client that has disconnected).
1192 * @param key The local channel id in host byte order
1193 * @param value The value stored at the key (channel to destroy).
1194 * @return #GNUNET_OK, keep iterating.
1197 channel_destroy_iterator (void *cls,
1201 struct CadetClient *c = cls;
1202 struct CadetChannel *ch = value;
1204 LOG (GNUNET_ERROR_TYPE_DEBUG,
1205 "Destroying %s, due to %s disconnecting.\n",
1208 GNUNET_assert (GNUNET_YES ==
1209 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1212 GCCH_channel_local_destroy (ch,
1219 * Remove client's ports from the global hashmap on disconnect.
1221 * @param cls Closure (unused).
1222 * @param key the port.
1223 * @param value the `struct CadetClient` to remove
1224 * @return #GNUNET_OK, keep iterating.
1227 client_release_ports (void *cls,
1228 const struct GNUNET_HashCode *key,
1231 struct CadetClient *c = value;
1233 LOG (GNUNET_ERROR_TYPE_DEBUG,
1234 "Closing port %s due to %s disconnect.\n",
1237 GNUNET_assert (GNUNET_YES ==
1238 GNUNET_CONTAINER_multihashmap_remove (open_ports,
1241 GNUNET_assert (GNUNET_YES ==
1242 GNUNET_CONTAINER_multihashmap_remove (c->ports,
1250 * Callback called when a client disconnected from the service
1252 * @param cls closure for the service
1253 * @param client the client that disconnected
1254 * @param internal_cls should be equal to @a c
1257 client_disconnect_cb (void *cls,
1258 struct GNUNET_SERVICE_Client *client,
1261 struct CadetClient *c = internal_cls;
1263 GNUNET_assert (c->client == client);
1264 LOG (GNUNET_ERROR_TYPE_DEBUG,
1265 "%s is disconnecting.\n",
1267 if (NULL != c->channels)
1269 GNUNET_CONTAINER_multihashmap32_iterate (c->channels,
1270 &channel_destroy_iterator,
1272 GNUNET_CONTAINER_multihashmap32_destroy (c->channels);
1274 if (NULL != c->ports)
1276 GNUNET_CONTAINER_multihashmap_iterate (c->ports,
1277 &client_release_ports,
1279 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
1281 GNUNET_CONTAINER_DLL_remove (clients_head,
1284 GNUNET_STATISTICS_update (stats,
1289 if ( (NULL == clients_head) &&
1290 (GNUNET_YES == shutting_down) )
1296 * Setup CADET internals.
1298 * @param cls closure
1299 * @param server the initialized server
1300 * @param c configuration to use
1304 const struct GNUNET_CONFIGURATION_Handle *c,
1305 struct GNUNET_SERVICE_Handle *service)
1309 GNUNET_CONFIGURATION_get_value_number (c,
1314 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1317 "needs to be a number");
1318 ratchet_messages = 64;
1321 GNUNET_CONFIGURATION_get_value_time (c,
1326 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1329 "need delay value");
1330 ratchet_time = GNUNET_TIME_UNIT_HOURS;
1333 my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
1334 if (NULL == my_private_key)
1337 GNUNET_SCHEDULER_shutdown ();
1340 GNUNET_CRYPTO_eddsa_key_get_public (my_private_key,
1341 &my_full_id.public_key);
1342 stats = GNUNET_STATISTICS_create ("cadet",
1344 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
1346 ats_ch = GNUNET_ATS_connectivity_init (c);
1347 /* FIXME: optimize code to allow GNUNET_YES here! */
1348 open_ports = GNUNET_CONTAINER_multihashmap_create (16,
1350 loose_channels = GNUNET_CONTAINER_multihashmap_create (16,
1352 peers = GNUNET_CONTAINER_multipeermap_create (16,
1354 connections = GNUNET_CONTAINER_multishortmap_create (256,
1359 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1360 "CADET started for peer %s\n",
1361 GNUNET_i2s (&my_full_id));
1367 * Define "main" method using service macro.
1371 GNUNET_SERVICE_OPTION_NONE,
1374 &client_disconnect_cb,
1376 GNUNET_MQ_hd_fixed_size (port_open,
1377 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN,
1378 struct GNUNET_CADET_PortMessage,
1380 GNUNET_MQ_hd_fixed_size (port_close,
1381 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE,
1382 struct GNUNET_CADET_PortMessage,
1384 GNUNET_MQ_hd_fixed_size (channel_create,
1385 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE,
1386 struct GNUNET_CADET_LocalChannelCreateMessage,
1388 GNUNET_MQ_hd_fixed_size (channel_destroy,
1389 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY,
1390 struct GNUNET_CADET_LocalChannelDestroyMessage,
1392 GNUNET_MQ_hd_var_size (data,
1393 GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
1394 struct GNUNET_CADET_LocalData,
1396 GNUNET_MQ_hd_fixed_size (ack,
1397 GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK,
1398 struct GNUNET_CADET_LocalAck,
1400 GNUNET_MQ_hd_fixed_size (get_peers,
1401 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS,
1402 struct GNUNET_MessageHeader,
1404 GNUNET_MQ_hd_fixed_size (show_peer,
1405 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER,
1406 struct GNUNET_CADET_LocalInfo,
1408 GNUNET_MQ_hd_fixed_size (info_tunnels,
1409 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
1410 struct GNUNET_MessageHeader,
1412 GNUNET_MQ_hd_fixed_size (info_tunnel,
1413 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
1414 struct GNUNET_CADET_LocalInfo,
1416 GNUNET_MQ_hd_fixed_size (info_dump,
1417 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP,
1418 struct GNUNET_MessageHeader,
1420 GNUNET_MQ_handler_end ());
1422 /* end of gnunet-service-cadet-new.c */