2 This file is part of GNUnet.
3 Copyright (C) 2001-2013, 2017 GNUnet e.V.
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
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 channel %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 * Task run during shutdown.
343 shutdown_task (void *cls)
345 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
347 shutting_down = GNUNET_YES;
351 GNUNET_STATISTICS_destroy (stats,
355 if (NULL != open_ports)
357 GNUNET_CONTAINER_multihashmap_destroy (open_ports);
360 if (NULL != loose_channels)
362 GNUNET_CONTAINER_multihashmap_destroy (loose_channels);
363 loose_channels = NULL;
365 /* Destroy tunnels. Note that all channels must be destroyed first! */
366 GCP_iterate_all (&destroy_tunnels_now,
368 /* All tunnels, channels, connections and CORE must be down before this point. */
369 GCP_destroy_all_peers ();
372 GNUNET_CONTAINER_multipeermap_destroy (peers);
375 if (NULL != connections)
377 GNUNET_CONTAINER_multishortmap_destroy (connections);
382 GNUNET_ATS_connectivity_done (ats_ch);
387 GNUNET_free_non_null (my_private_key);
388 my_private_key = NULL;
393 * We had a remote connection @a value to port @a port before
394 * client @a cls opened port @a port. Bind them now.
396 * @param cls the `struct CadetClient`
397 * @param port the port
398 * @param value the `struct CadetChannel`
399 * @return #GNUNET_YES (iterate over all such channels)
402 bind_loose_channel (void *cls,
403 const struct GNUNET_HashCode *port,
406 struct CadetClient *c = cls;
407 struct CadetChannel *ch = value;
411 GNUNET_assert (GNUNET_YES ==
412 GNUNET_CONTAINER_multihashmap_remove (loose_channels,
420 * Handle port open request. Creates a mapping from the
421 * port to the respective client and checks whether we have
422 * loose channels trying to bind to the port. If so, those
425 * @param cls Identification of the client.
426 * @param pmsg The actual message.
429 handle_port_open (void *cls,
430 const struct GNUNET_CADET_PortMessage *pmsg)
432 struct CadetClient *c = cls;
434 LOG (GNUNET_ERROR_TYPE_DEBUG,
435 "Open port %s requested by client %s\n",
436 GNUNET_h2s (&pmsg->port),
438 if (NULL == c->ports)
439 c->ports = GNUNET_CONTAINER_multihashmap_create (4,
442 GNUNET_CONTAINER_multihashmap_put (c->ports,
445 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY))
448 GNUNET_SERVICE_client_drop (c->client);
451 (void) GNUNET_CONTAINER_multihashmap_put (open_ports,
454 GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
455 GNUNET_CONTAINER_multihashmap_get_multiple (loose_channels,
459 GNUNET_SERVICE_client_continue (c->client);
464 * Handler for port close requests. Marks this port as closed
465 * (unless of course we have another client with the same port
466 * open). Note that existing channels accepted on the port are
469 * @param cls Identification of the client.
470 * @param pmsg The actual message.
473 handle_port_close (void *cls,
474 const struct GNUNET_CADET_PortMessage *pmsg)
476 struct CadetClient *c = cls;
478 LOG (GNUNET_ERROR_TYPE_DEBUG,
479 "Closing port %s as requested by client %s\n",
480 GNUNET_h2s (&pmsg->port),
483 GNUNET_CONTAINER_multihashmap_remove (c->ports,
488 GNUNET_SERVICE_client_drop (c->client);
491 GNUNET_assert (GNUNET_YES ==
492 GNUNET_CONTAINER_multihashmap_remove (open_ports,
495 GNUNET_SERVICE_client_continue (c->client);
500 * Handler for requests for us creating a new channel to another peer and port.
502 * @param cls Identification of the client.
503 * @param tcm The actual message.
506 handle_channel_create (void *cls,
507 const struct GNUNET_CADET_LocalChannelCreateMessage *tcm)
509 struct CadetClient *c = cls;
510 struct CadetChannel *ch;
512 if (ntohl (tcm->ccn.channel_of_client) < GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
514 /* Channel ID not in allowed range. */
516 GNUNET_SERVICE_client_drop (c->client);
519 ch = lookup_channel (c,
523 /* Channel ID already in use. Not allowed. */
525 GNUNET_SERVICE_client_drop (c->client);
530 ch = GCCH_channel_local_new (c,
539 GNUNET_SERVICE_client_drop (c->client);
542 GNUNET_assert (GNUNET_YES ==
543 GNUNET_CONTAINER_multihashmap32_put (c->channels,
544 ntohl (tcm->ccn.channel_of_client),
546 GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
548 LOG (GNUNET_ERROR_TYPE_DEBUG,
549 "New channel %s to %s at port %s requested by client %s\n",
551 GNUNET_i2s (&tcm->peer),
552 GNUNET_h2s (&tcm->port),
554 GNUNET_SERVICE_client_continue (c->client);
559 * Handler for requests of destroying an existing channel.
561 * @param cls client identification of the client
562 * @param msg the actual message
565 handle_channel_destroy (void *cls,
566 const struct GNUNET_CADET_LocalChannelDestroyMessage *msg)
568 struct CadetClient *c = cls;
569 struct CadetChannel *ch;
571 ch = lookup_channel (c,
575 /* Client attempted to destroy unknown channel */
577 GNUNET_SERVICE_client_drop (c->client);
580 LOG (GNUNET_ERROR_TYPE_INFO,
581 "Client %s is destroying channel %s\n",
584 GNUNET_assert (GNUNET_YES ==
585 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
586 ntohl (msg->ccn.channel_of_client),
588 GCCH_channel_local_destroy (ch);
589 GNUNET_SERVICE_client_continue (c->client);
594 * Check for client traffic data message is well-formed.
596 * @param cls identification of the client
597 * @param msg the actual message
598 * @return #GNUNET_OK if @a msg is OK, #GNUNET_SYSERR if not
601 check_data (void *cls,
602 const struct GNUNET_CADET_LocalData *msg)
604 const struct GNUNET_MessageHeader *payload;
606 size_t payload_claimed_size;
608 /* Sanity check for message size */
609 payload_size = ntohs (msg->header.size) - sizeof (*msg);
610 if ( (payload_size < sizeof (struct GNUNET_MessageHeader)) ||
611 (GNUNET_CONSTANTS_MAX_CADET_MESSAGE_SIZE < payload_size) )
614 return GNUNET_SYSERR;
616 payload = (struct GNUNET_MessageHeader *) &msg[1];
617 payload_claimed_size = ntohs (payload->size);
618 if (payload_size != payload_claimed_size)
621 return GNUNET_SYSERR;
628 * Handler for client payload traffic to be send on a channel to
631 * @param cls identification of the client
632 * @param msg the actual message
635 handle_data (void *cls,
636 const struct GNUNET_CADET_LocalData *msg)
638 struct CadetClient *c = cls;
639 struct CadetChannel *ch;
640 const struct GNUNET_MessageHeader *payload;
642 ch = lookup_channel (c,
646 /* Channel does not exist! */
648 GNUNET_SERVICE_client_drop (c->client);
652 payload = (const struct GNUNET_MessageHeader *) &msg[1];
653 LOG (GNUNET_ERROR_TYPE_DEBUG,
654 "Received %u bytes payload from client %s for channel %s\n",
655 ntohs (payload->size),
659 GCCH_handle_local_data (ch,
662 GNUNET_SERVICE_client_drop (c->client);
665 GNUNET_SERVICE_client_continue (c->client);
670 * Handler for client's ACKs for payload traffic.
672 * @param cls identification of the client.
673 * @param msg The actual message.
676 handle_ack (void *cls,
677 const struct GNUNET_CADET_LocalAck *msg)
679 struct CadetClient *c = cls;
680 struct CadetChannel *ch;
682 ch = lookup_channel (c,
686 /* Channel does not exist! */
688 GNUNET_SERVICE_client_drop (c->client);
691 LOG (GNUNET_ERROR_TYPE_DEBUG,
692 "Got a local ACK from client %s for channel %s\n",
695 GCCH_handle_local_ack (ch);
696 GNUNET_SERVICE_client_continue (c->client);
701 * Iterator over all peers to send a monitoring client info about each peer.
703 * @param cls Closure ().
704 * @param peer Peer ID (tunnel remote peer).
705 * @param value Peer info.
706 * @return #GNUNET_YES, to keep iterating.
709 get_all_peers_iterator (void *cls,
710 const struct GNUNET_PeerIdentity *peer,
713 struct CadetClient *c = cls;
714 struct CadetPeer *p = value;
715 struct GNUNET_MQ_Envelope *env;
716 struct GNUNET_CADET_LocalInfoPeer *msg;
718 env = GNUNET_MQ_msg (msg,
719 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
720 msg->destination = *peer;
721 msg->paths = htons (GCP_count_paths (p));
722 msg->tunnel = htons (NULL != GCP_get_tunnel (p,
724 GNUNET_MQ_send (c->mq,
731 * Handler for client's INFO PEERS request.
733 * @param cls Identification of the client.
734 * @param message The actual message.
737 handle_get_peers (void *cls,
738 const struct GNUNET_MessageHeader *message)
740 struct CadetClient *c = cls;
741 struct GNUNET_MQ_Envelope *env;
742 struct GNUNET_MessageHeader *reply;
744 GCP_iterate_all (&get_all_peers_iterator,
746 env = GNUNET_MQ_msg (reply,
747 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS);
748 GNUNET_MQ_send (c->mq,
750 GNUNET_SERVICE_client_continue (c->client);
755 * Iterator over all paths of a peer to build an InfoPeer message.
756 * Message contains blocks of peers, first not included.
758 * @param cls message queue for transmission
759 * @param path Path itself
760 * @param off offset of the peer on @a path
761 * @return #GNUNET_YES if should keep iterating.
762 * #GNUNET_NO otherwise.
765 path_info_iterator (void *cls,
766 struct CadetPeerPath *path,
769 struct GNUNET_MQ_Handle *mq = cls;
770 struct GNUNET_MQ_Envelope *env;
771 struct GNUNET_MessageHeader *resp;
772 struct GNUNET_PeerIdentity *id;
775 unsigned int path_length;
777 path_length = GCPP_get_length (path);
778 path_size = sizeof (struct GNUNET_PeerIdentity) * (path_length - 1);
779 if (sizeof (*resp) + path_size > UINT16_MAX)
781 LOG (GNUNET_ERROR_TYPE_WARNING,
782 "Path of %u entries is too long for info message\n",
786 env = GNUNET_MQ_msg_extra (resp,
788 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER);
789 id = (struct GNUNET_PeerIdentity *) &resp[1];
791 /* Don't copy first peer. First peer is always the local one. Last
792 * peer is always the destination (leave as 0, EOL).
794 for (i = 0; i < off; i++)
795 id[i] = *GCP_get_id (GCPP_get_peer_at_offset (path,
804 * Handler for client's SHOW_PEER request.
806 * @param cls Identification of the client.
807 * @param msg The actual message.
810 handle_show_peer (void *cls,
811 const struct GNUNET_CADET_LocalInfo *msg)
813 struct CadetClient *c = cls;
815 struct GNUNET_MQ_Envelope *env;
816 struct GNUNET_MessageHeader *resp;
818 p = GCP_get (&msg->peer,
821 GCP_iterate_paths (p,
824 /* Send message with 0/0 to indicate the end */
825 env = GNUNET_MQ_msg (resp,
826 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER_END);
827 GNUNET_MQ_send (c->mq,
829 GNUNET_SERVICE_client_continue (c->client);
834 * Iterator over all tunnels to send a monitoring client info about each tunnel.
836 * @param cls Closure ().
837 * @param peer Peer ID (tunnel remote peer).
838 * @param value a `struct CadetPeer`
839 * @return #GNUNET_YES, to keep iterating.
842 get_all_tunnels_iterator (void *cls,
843 const struct GNUNET_PeerIdentity *peer,
846 struct CadetClient *c = cls;
847 struct CadetPeer *p = value;
848 struct GNUNET_MQ_Envelope *env;
849 struct GNUNET_CADET_LocalInfoTunnel *msg;
850 struct CadetTunnel *t;
852 t = GCP_get_tunnel (p,
856 env = GNUNET_MQ_msg (msg,
857 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
858 msg->destination = *peer;
859 msg->channels = htonl (GCT_count_channels (t));
860 msg->connections = htonl (GCT_count_any_connections (t));
861 msg->cstate = htons (0);
862 msg->estate = htons ((uint16_t) GCT_get_estate (t));
863 GNUNET_MQ_send (c->mq,
870 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS request.
872 * @param cls client Identification of the client.
873 * @param message The actual message.
876 handle_info_tunnels (void *cls,
877 const struct GNUNET_MessageHeader *message)
879 struct CadetClient *c = cls;
880 struct GNUNET_MQ_Envelope *env;
881 struct GNUNET_MessageHeader *reply;
883 GCP_iterate_all (&get_all_tunnels_iterator,
885 env = GNUNET_MQ_msg (reply,
886 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS);
887 GNUNET_MQ_send (c->mq,
889 GNUNET_SERVICE_client_continue (c->client);
894 * Update the message with information about the connection.
896 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
897 * @param c a connection about which we should store information in @a cls
900 iter_connection (void *cls,
901 struct CadetConnection *c)
903 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
904 struct GNUNET_CADET_ConnectionTunnelIdentifier *h;
906 h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
907 h[msg->connections++] = *(GCC_get_id (c));
912 * Update the message with information about the channel.
914 * @param cls a `struct GNUNET_CADET_LocalInfoTunnel` message to update
915 * @param ch a channel about which we should store information in @a cls
918 iter_channel (void *cls,
919 struct CadetChannel *ch)
921 struct GNUNET_CADET_LocalInfoTunnel *msg = cls;
922 struct GNUNET_CADET_ConnectionTunnelIdentifier *h = (struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1];
923 struct GNUNET_CADET_ChannelTunnelNumber *chn
924 = (struct GNUNET_CADET_ChannelTunnelNumber *) &h[msg->connections];
926 chn[msg->channels++] = GCCH_get_id (ch);
931 * Handler for client's #GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL request.
933 * @param cls Identification of the client.
934 * @param msg The actual message.
937 handle_info_tunnel (void *cls,
938 const struct GNUNET_CADET_LocalInfo *msg)
940 struct CadetClient *c = cls;
941 struct GNUNET_MQ_Envelope *env;
942 struct GNUNET_CADET_LocalInfoTunnel *resp;
943 struct CadetTunnel *t;
948 p = GCP_get (&msg->peer,
950 t = GCP_get_tunnel (p,
954 /* We don't know the tunnel */
955 struct GNUNET_MQ_Envelope *env;
956 struct GNUNET_CADET_LocalInfoTunnel *warn;
958 LOG (GNUNET_ERROR_TYPE_INFO,
959 "Tunnel to %s unknown\n",
960 GNUNET_i2s_full (&msg->peer));
961 env = GNUNET_MQ_msg (warn,
962 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
963 warn->destination = msg->peer;
964 GNUNET_MQ_send (c->mq,
966 GNUNET_SERVICE_client_continue (c->client);
970 /* Initialize context */
971 ch_n = GCT_count_channels (t);
972 c_n = GCT_count_any_connections (t);
973 env = GNUNET_MQ_msg_extra (resp,
974 c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier) +
975 ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber),
976 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL);
977 resp->destination = msg->peer;
978 /* Do not reorder! #iter_channel needs counters in HBO! */
979 GCT_iterate_connections (t,
982 GCT_iterate_channels (t,
985 resp->connections = htonl (resp->connections);
986 resp->channels = htonl (resp->channels);
987 resp->cstate = htons (0);
988 resp->estate = htons (GCT_get_estate (t));
989 GNUNET_MQ_send (c->mq,
991 GNUNET_SERVICE_client_continue (c->client);
996 * Iterator over all peers to dump info for each peer.
998 * @param cls Closure (unused).
999 * @param peer Peer ID (tunnel remote peer).
1000 * @param value Peer info.
1002 * @return #GNUNET_YES, to keep iterating.
1005 show_peer_iterator (void *cls,
1006 const struct GNUNET_PeerIdentity *peer,
1009 struct CadetPeer *p = value;
1010 struct CadetTunnel *t;
1012 t = GCP_get_tunnel (p,
1016 GNUNET_ERROR_TYPE_ERROR);
1017 LOG (GNUNET_ERROR_TYPE_ERROR, "\n");
1023 * Handler for client's INFO_DUMP request.
1025 * @param cls Identification of the client.
1026 * @param message The actual message.
1029 handle_info_dump (void *cls,
1030 const struct GNUNET_MessageHeader *message)
1032 struct CadetClient *c = cls;
1034 LOG (GNUNET_ERROR_TYPE_INFO,
1035 "Received dump info request from client %u\n",
1038 LOG (GNUNET_ERROR_TYPE_ERROR,
1039 "*************************** DUMP START ***************************\n");
1040 for (struct CadetClient *ci = clients_head;
1044 LOG (GNUNET_ERROR_TYPE_ERROR,
1045 "Client %u (%p), handle: %p, ports: %u, channels: %u\n",
1050 ? GNUNET_CONTAINER_multihashmap_size (ci->ports)
1052 GNUNET_CONTAINER_multihashmap32_size (ci->channels));
1054 LOG (GNUNET_ERROR_TYPE_ERROR, "***************************\n");
1055 GCP_iterate_all (&show_peer_iterator,
1058 LOG (GNUNET_ERROR_TYPE_ERROR,
1059 "**************************** DUMP END ****************************\n");
1061 GNUNET_SERVICE_client_continue (c->client);
1067 * Callback called when a client connects to the service.
1069 * @param cls closure for the service
1070 * @param client the new client that connected to the service
1071 * @param mq the message queue used to send messages to the client
1075 client_connect_cb (void *cls,
1076 struct GNUNET_SERVICE_Client *client,
1077 struct GNUNET_MQ_Handle *mq)
1079 struct CadetClient *c;
1081 c = GNUNET_new (struct CadetClient);
1084 c->id = next_client_id++; /* overflow not important: just for debug */
1086 = GNUNET_CONTAINER_multihashmap32_create (32);
1087 GNUNET_CONTAINER_DLL_insert (clients_head,
1090 GNUNET_STATISTICS_update (stats,
1094 LOG (GNUNET_ERROR_TYPE_DEBUG,
1095 "Client %s connected\n",
1102 * Iterator for deleting each channel whose client endpoint disconnected.
1104 * @param cls Closure (client that has disconnected).
1105 * @param key The local channel id in host byte order
1106 * @param value The value stored at the key (channel to destroy).
1107 * @return #GNUNET_OK, keep iterating.
1110 channel_destroy_iterator (void *cls,
1114 struct CadetClient *c = cls;
1115 struct CadetChannel *ch = value;
1117 GNUNET_assert (GNUNET_YES ==
1118 GNUNET_CONTAINER_multihashmap32_remove (c->channels,
1121 LOG (GNUNET_ERROR_TYPE_DEBUG,
1122 "Destroying channel %s, due to client %s disconnecting.\n",
1125 if (key < GNUNET_CADET_LOCAL_CHANNEL_ID_CLI)
1126 GCCH_channel_local_destroy (ch);
1128 GCCH_channel_incoming_destroy (ch);
1134 * Remove client's ports from the global hashmap on disconnect.
1136 * @param cls Closure (unused).
1137 * @param key the port.
1138 * @param value the `struct CadetClient` to remove
1139 * @return #GNUNET_OK, keep iterating.
1142 client_release_ports (void *cls,
1143 const struct GNUNET_HashCode *key,
1146 struct CadetClient *c = value;
1148 LOG (GNUNET_ERROR_TYPE_DEBUG,
1149 "Closing port %s due to client %s disconnect.\n",
1152 GNUNET_assert (GNUNET_YES ==
1153 GNUNET_CONTAINER_multihashmap_remove (open_ports,
1156 GNUNET_assert (GNUNET_YES ==
1157 GNUNET_CONTAINER_multihashmap_remove (c->ports,
1165 * Callback called when a client disconnected from the service
1167 * @param cls closure for the service
1168 * @param client the client that disconnected
1169 * @param internal_cls should be equal to @a c
1172 client_disconnect_cb (void *cls,
1173 struct GNUNET_SERVICE_Client *client,
1176 struct CadetClient *c = internal_cls;
1178 GNUNET_assert (c->client == client);
1179 LOG (GNUNET_ERROR_TYPE_DEBUG,
1180 "Client %s is disconnecting.\n",
1182 if (NULL != c->channels)
1184 GNUNET_CONTAINER_multihashmap32_iterate (c->channels,
1185 &channel_destroy_iterator,
1187 GNUNET_CONTAINER_multihashmap32_destroy (c->channels);
1189 if (NULL != c->ports)
1191 GNUNET_CONTAINER_multihashmap_iterate (c->ports,
1192 &client_release_ports,
1194 GNUNET_CONTAINER_multihashmap_destroy (c->ports);
1196 GNUNET_CONTAINER_DLL_remove (clients_head,
1199 GNUNET_STATISTICS_update (stats,
1208 * Setup CADET internals.
1210 * @param cls closure
1211 * @param server the initialized server
1212 * @param c configuration to use
1216 const struct GNUNET_CONFIGURATION_Handle *c,
1217 struct GNUNET_SERVICE_Handle *service)
1221 GNUNET_CONFIGURATION_get_value_number (c,
1226 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1229 "needs to be a number");
1230 ratchet_messages = 64;
1233 GNUNET_CONFIGURATION_get_value_time (c,
1238 GNUNET_log_config_invalid (GNUNET_ERROR_TYPE_WARNING,
1241 "need delay value");
1242 ratchet_time = GNUNET_TIME_UNIT_HOURS;
1245 my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (c);
1246 if (NULL == my_private_key)
1249 GNUNET_SCHEDULER_shutdown ();
1252 GNUNET_CRYPTO_eddsa_key_get_public (my_private_key,
1253 &my_full_id.public_key);
1254 stats = GNUNET_STATISTICS_create ("cadet",
1256 GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
1258 ats_ch = GNUNET_ATS_connectivity_init (c);
1259 /* FIXME: optimize code to allow GNUNET_YES here! */
1260 open_ports = GNUNET_CONTAINER_multihashmap_create (16,
1262 loose_channels = GNUNET_CONTAINER_multihashmap_create (16,
1264 peers = GNUNET_CONTAINER_multipeermap_create (16,
1266 connections = GNUNET_CONTAINER_multishortmap_create (256,
1271 GNUNET_log (GNUNET_ERROR_TYPE_INFO,
1272 "CADET started for peer %s\n",
1273 GNUNET_i2s (&my_full_id));
1279 * Define "main" method using service macro.
1283 GNUNET_SERVICE_OPTION_NONE,
1286 &client_disconnect_cb,
1288 GNUNET_MQ_hd_fixed_size (port_open,
1289 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_OPEN,
1290 struct GNUNET_CADET_PortMessage,
1292 GNUNET_MQ_hd_fixed_size (port_close,
1293 GNUNET_MESSAGE_TYPE_CADET_LOCAL_PORT_CLOSE,
1294 struct GNUNET_CADET_PortMessage,
1296 GNUNET_MQ_hd_fixed_size (channel_create,
1297 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_CREATE,
1298 struct GNUNET_CADET_LocalChannelCreateMessage,
1300 GNUNET_MQ_hd_fixed_size (channel_destroy,
1301 GNUNET_MESSAGE_TYPE_CADET_LOCAL_CHANNEL_DESTROY,
1302 struct GNUNET_CADET_LocalChannelDestroyMessage,
1304 GNUNET_MQ_hd_var_size (data,
1305 GNUNET_MESSAGE_TYPE_CADET_LOCAL_DATA,
1306 struct GNUNET_CADET_LocalData,
1308 GNUNET_MQ_hd_fixed_size (ack,
1309 GNUNET_MESSAGE_TYPE_CADET_LOCAL_ACK,
1310 struct GNUNET_CADET_LocalAck,
1312 GNUNET_MQ_hd_fixed_size (get_peers,
1313 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEERS,
1314 struct GNUNET_MessageHeader,
1316 GNUNET_MQ_hd_fixed_size (show_peer,
1317 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PEER,
1318 struct GNUNET_CADET_LocalInfo,
1320 GNUNET_MQ_hd_fixed_size (info_tunnels,
1321 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNELS,
1322 struct GNUNET_MessageHeader,
1324 GNUNET_MQ_hd_fixed_size (info_tunnel,
1325 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL,
1326 struct GNUNET_CADET_LocalInfo,
1328 GNUNET_MQ_hd_fixed_size (info_dump,
1329 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_DUMP,
1330 struct GNUNET_MessageHeader,
1332 GNUNET_MQ_handler_end ());
1334 /* end of gnunet-service-cadet-new.c */